linux-sg2042/fs/nfs/nfs4proc.c

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/*
* fs/nfs/nfs4proc.c
*
* Client-side procedure declarations for NFSv4.
*
* Copyright (c) 2002 The Regents of the University of Michigan.
* All rights reserved.
*
* Kendrick Smith <kmsmith@umich.edu>
* Andy Adamson <andros@umich.edu>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/sunrpc/bc_xprt.h>
#include "nfs4_fs.h"
#include "delegation.h"
#include "internal.h"
#include "iostat.h"
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
#include "callback.h"
#define NFSDBG_FACILITY NFSDBG_PROC
#define NFS4_POLL_RETRY_MIN (HZ/10)
#define NFS4_POLL_RETRY_MAX (15*HZ)
#define NFS4_MAX_LOOP_ON_RECOVER (10)
struct nfs4_opendata;
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
/* Prevent leaks of NFSv4 errors into userland */
static int nfs4_map_errors(int err)
{
if (err >= -1000)
return err;
switch (err) {
case -NFS4ERR_RESOURCE:
return -EREMOTEIO;
default:
dprintk("%s could not handle NFSv4 error %d\n",
__func__, -err);
break;
}
return -EIO;
}
/*
* This is our standard bitmap for GETATTR requests.
*/
const u32 nfs4_fattr_bitmap[2] = {
FATTR4_WORD0_TYPE
| FATTR4_WORD0_CHANGE
| FATTR4_WORD0_SIZE
| FATTR4_WORD0_FSID
| FATTR4_WORD0_FILEID,
FATTR4_WORD1_MODE
| FATTR4_WORD1_NUMLINKS
| FATTR4_WORD1_OWNER
| FATTR4_WORD1_OWNER_GROUP
| FATTR4_WORD1_RAWDEV
| FATTR4_WORD1_SPACE_USED
| FATTR4_WORD1_TIME_ACCESS
| FATTR4_WORD1_TIME_METADATA
| FATTR4_WORD1_TIME_MODIFY
};
const u32 nfs4_statfs_bitmap[2] = {
FATTR4_WORD0_FILES_AVAIL
| FATTR4_WORD0_FILES_FREE
| FATTR4_WORD0_FILES_TOTAL,
FATTR4_WORD1_SPACE_AVAIL
| FATTR4_WORD1_SPACE_FREE
| FATTR4_WORD1_SPACE_TOTAL
};
const u32 nfs4_pathconf_bitmap[2] = {
FATTR4_WORD0_MAXLINK
| FATTR4_WORD0_MAXNAME,
0
};
const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
| FATTR4_WORD0_MAXREAD
| FATTR4_WORD0_MAXWRITE
| FATTR4_WORD0_LEASE_TIME,
0
};
const u32 nfs4_fs_locations_bitmap[2] = {
FATTR4_WORD0_TYPE
| FATTR4_WORD0_CHANGE
| FATTR4_WORD0_SIZE
| FATTR4_WORD0_FSID
| FATTR4_WORD0_FILEID
| FATTR4_WORD0_FS_LOCATIONS,
FATTR4_WORD1_MODE
| FATTR4_WORD1_NUMLINKS
| FATTR4_WORD1_OWNER
| FATTR4_WORD1_OWNER_GROUP
| FATTR4_WORD1_RAWDEV
| FATTR4_WORD1_SPACE_USED
| FATTR4_WORD1_TIME_ACCESS
| FATTR4_WORD1_TIME_METADATA
| FATTR4_WORD1_TIME_MODIFY
| FATTR4_WORD1_MOUNTED_ON_FILEID
};
static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
struct nfs4_readdir_arg *readdir)
{
__be32 *start, *p;
BUG_ON(readdir->count < 80);
if (cookie > 2) {
readdir->cookie = cookie;
memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
return;
}
readdir->cookie = 0;
memset(&readdir->verifier, 0, sizeof(readdir->verifier));
if (cookie == 2)
return;
/*
* NFSv4 servers do not return entries for '.' and '..'
* Therefore, we fake these entries here. We let '.'
* have cookie 0 and '..' have cookie 1. Note that
* when talking to the server, we always send cookie 0
* instead of 1 or 2.
*/
start = p = kmap_atomic(*readdir->pages, KM_USER0);
if (cookie == 0) {
*p++ = xdr_one; /* next */
*p++ = xdr_zero; /* cookie, first word */
*p++ = xdr_one; /* cookie, second word */
*p++ = xdr_one; /* entry len */
memcpy(p, ".\0\0\0", 4); /* entry */
p++;
*p++ = xdr_one; /* bitmap length */
*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
*p++ = htonl(8); /* attribute buffer length */
p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
}
*p++ = xdr_one; /* next */
*p++ = xdr_zero; /* cookie, first word */
*p++ = xdr_two; /* cookie, second word */
*p++ = xdr_two; /* entry len */
memcpy(p, "..\0\0", 4); /* entry */
p++;
*p++ = xdr_one; /* bitmap length */
*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
*p++ = htonl(8); /* attribute buffer length */
p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
readdir->pgbase = (char *)p - (char *)start;
readdir->count -= readdir->pgbase;
kunmap_atomic(start, KM_USER0);
}
static int nfs4_wait_clnt_recover(struct nfs_client *clp)
{
int res;
might_sleep();
res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
2009-03-12 02:10:30 +08:00
nfs_wait_bit_killable, TASK_KILLABLE);
return res;
}
static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
{
int res = 0;
might_sleep();
if (*timeout <= 0)
*timeout = NFS4_POLL_RETRY_MIN;
if (*timeout > NFS4_POLL_RETRY_MAX)
*timeout = NFS4_POLL_RETRY_MAX;
schedule_timeout_killable(*timeout);
if (fatal_signal_pending(current))
res = -ERESTARTSYS;
*timeout <<= 1;
return res;
}
/* This is the error handling routine for processes that are allowed
* to sleep.
*/
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_state *state = exception->state;
int ret = errorcode;
exception->retry = 0;
switch(errorcode) {
case 0:
return 0;
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;
nfs4_state_mark_reclaim_nograce(clp, state);
goto do_state_recovery;
case -NFS4ERR_STALE_STATEID:
if (state == NULL)
break;
nfs4_state_mark_reclaim_reboot(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_EXPIRED:
goto do_state_recovery;
#if defined(CONFIG_NFS_V4_1)
nfs41: kick start nfs41 session recovery when handling errors Remove checking for any errors that the SEQUENCE operation does not return. -NFS4ERR_STALE_CLIENTID, NFS4ERR_EXPIRED, NFS4ERR_CB_PATH_DOWN, NFS4ERR_BACK_CHAN_BUSY, NFS4ERR_OP_NOT_IN_SESSION. SEQUENCE operation error recovery is very primative, we only reset the session. Remove checking for any errors that are returned by the SEQUENCE operation, but that resetting the session won't address. NFS4ERR_RETRY_UNCACHED_REP, NFS4ERR_SEQUENCE_POS,NFS4ERR_TOO_MANY_OPS. Add error checking for missing SEQUENCE errors that a session reset will address. NFS4ERR_BAD_HIGH_SLOT, NFS4ERR_DEADSESSION, NFS4ERR_SEQ_FALSE_RETRY. A reset of the session is currently our only response to a SEQUENCE operation error. Don't reset the session on errors where a new session won't help. Don't reset the session on errors where a new session won't help. [nfs41: nfs4_async_handle_error update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: trigger the state manager for session reset] Replace session state bit with nfs_client state bit. Set the NFS4CLNT_SESSION_SETUP bit upon a session related error in the sync/async error handlers. [nfs41: _nfs4_async_handle_error fix session reset error list] Sequence operation errors that session reset could help. NFS4ERR_BADSESSION NFS4ERR_BADSLOT NFS4ERR_BAD_HIGH_SLOT NFS4ERR_DEADSESSION NFS4ERR_CONN_NOT_BOUND_TO_SESSION NFS4ERR_SEQ_FALSE_RETRY NFS4ERR_SEQ_MISORDERED Sequence operation errors that a session reset would not help NFS4ERR_BADXDR NFS4ERR_DELAY NFS4ERR_REP_TOO_BIG NFS4ERR_REP_TOO_BIG_TO_CACHE NFS4ERR_REQ_TOO_BIG NFS4ERR_RETRY_UNCACHED_REP NFS4ERR_SEQUENCE_POS NFS4ERR_TOO_MANY_OPS Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41 nfs4_handle_exception fix session reset error list] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs41_sequece_call_done code to nfs41: sequence operation] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:42 +08:00
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
case -NFS4ERR_DEADSESSION:
case -NFS4ERR_SEQ_FALSE_RETRY:
case -NFS4ERR_SEQ_MISORDERED:
dprintk("%s ERROR: %d Reset session\n", __func__,
errorcode);
nfs4_schedule_state_recovery(clp);
nfs41: kick start nfs41 session recovery when handling errors Remove checking for any errors that the SEQUENCE operation does not return. -NFS4ERR_STALE_CLIENTID, NFS4ERR_EXPIRED, NFS4ERR_CB_PATH_DOWN, NFS4ERR_BACK_CHAN_BUSY, NFS4ERR_OP_NOT_IN_SESSION. SEQUENCE operation error recovery is very primative, we only reset the session. Remove checking for any errors that are returned by the SEQUENCE operation, but that resetting the session won't address. NFS4ERR_RETRY_UNCACHED_REP, NFS4ERR_SEQUENCE_POS,NFS4ERR_TOO_MANY_OPS. Add error checking for missing SEQUENCE errors that a session reset will address. NFS4ERR_BAD_HIGH_SLOT, NFS4ERR_DEADSESSION, NFS4ERR_SEQ_FALSE_RETRY. A reset of the session is currently our only response to a SEQUENCE operation error. Don't reset the session on errors where a new session won't help. Don't reset the session on errors where a new session won't help. [nfs41: nfs4_async_handle_error update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: trigger the state manager for session reset] Replace session state bit with nfs_client state bit. Set the NFS4CLNT_SESSION_SETUP bit upon a session related error in the sync/async error handlers. [nfs41: _nfs4_async_handle_error fix session reset error list] Sequence operation errors that session reset could help. NFS4ERR_BADSESSION NFS4ERR_BADSLOT NFS4ERR_BAD_HIGH_SLOT NFS4ERR_DEADSESSION NFS4ERR_CONN_NOT_BOUND_TO_SESSION NFS4ERR_SEQ_FALSE_RETRY NFS4ERR_SEQ_MISORDERED Sequence operation errors that a session reset would not help NFS4ERR_BADXDR NFS4ERR_DELAY NFS4ERR_REP_TOO_BIG NFS4ERR_REP_TOO_BIG_TO_CACHE NFS4ERR_REQ_TOO_BIG NFS4ERR_RETRY_UNCACHED_REP NFS4ERR_SEQUENCE_POS NFS4ERR_TOO_MANY_OPS Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41 nfs4_handle_exception fix session reset error list] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs41_sequece_call_done code to nfs41: sequence operation] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:42 +08:00
exception->retry = 1;
break;
#endif /* defined(CONFIG_NFS_V4_1) */
case -NFS4ERR_FILE_OPEN:
if (exception->timeout > HZ) {
/* We have retried a decent amount, time to
* fail
*/
ret = -EBUSY;
break;
}
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
ret = nfs4_delay(server->client, &exception->timeout);
if (ret != 0)
break;
case -NFS4ERR_OLD_STATEID:
exception->retry = 1;
}
/* We failed to handle the error */
return nfs4_map_errors(ret);
do_state_recovery:
nfs4_schedule_state_recovery(clp);
ret = nfs4_wait_clnt_recover(clp);
if (ret == 0)
exception->retry = 1;
return ret;
}
static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
{
struct nfs_client *clp = server->nfs_client;
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal,timestamp))
clp->cl_last_renewal = timestamp;
spin_unlock(&clp->cl_lock);
}
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
#if defined(CONFIG_NFS_V4_1)
nfs41: free slot Free a slot in the slot table. Mark the slot as free in the bitmap-based allocation table by clearing a bit corresponding to the slotid. Update lowest_free_slotid if freed slotid is lower than that. Update highest_used_slotid. In the case the freed slotid equals the highest_used_slotid, scan downwards for the next highest used slotid using the optimized fls* functions. Finally, wake up thread waiting on slot_tbl_waitq for a free slot to become available. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: free slot use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_first_zero_bit for nfs4_find_slot] While at it, obliterate lowest_free_slotid and fix-up related comments. As per review comment 21/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use __clear_bit for nfs4_free_slot] While at it, fix-up function comment. Part of review comment 22/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_last_bit in nfs4_free_slot to determine highest used slot.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:16 +08:00
/*
* nfs4_free_slot - free a slot and efficiently update slot table.
*
* freeing a slot is trivially done by clearing its respective bit
* in the bitmap.
* If the freed slotid equals highest_used_slotid we want to update it
* so that the server would be able to size down the slot table if needed,
* otherwise we know that the highest_used_slotid is still in use.
* When updating highest_used_slotid there may be "holes" in the bitmap
* so we need to scan down from highest_used_slotid to 0 looking for the now
* highest slotid in use.
* If none found, highest_used_slotid is set to -1.
*
* Must be called while holding tbl->slot_tbl_lock
nfs41: free slot Free a slot in the slot table. Mark the slot as free in the bitmap-based allocation table by clearing a bit corresponding to the slotid. Update lowest_free_slotid if freed slotid is lower than that. Update highest_used_slotid. In the case the freed slotid equals the highest_used_slotid, scan downwards for the next highest used slotid using the optimized fls* functions. Finally, wake up thread waiting on slot_tbl_waitq for a free slot to become available. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: free slot use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_first_zero_bit for nfs4_find_slot] While at it, obliterate lowest_free_slotid and fix-up related comments. As per review comment 21/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use __clear_bit for nfs4_free_slot] While at it, fix-up function comment. Part of review comment 22/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_last_bit in nfs4_free_slot to determine highest used slot.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:16 +08:00
*/
static void
nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
{
int slotid = free_slotid;
/* clear used bit in bitmap */
__clear_bit(slotid, tbl->used_slots);
/* update highest_used_slotid when it is freed */
if (slotid == tbl->highest_used_slotid) {
slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
if (slotid < tbl->max_slots)
nfs41: free slot Free a slot in the slot table. Mark the slot as free in the bitmap-based allocation table by clearing a bit corresponding to the slotid. Update lowest_free_slotid if freed slotid is lower than that. Update highest_used_slotid. In the case the freed slotid equals the highest_used_slotid, scan downwards for the next highest used slotid using the optimized fls* functions. Finally, wake up thread waiting on slot_tbl_waitq for a free slot to become available. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: free slot use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_first_zero_bit for nfs4_find_slot] While at it, obliterate lowest_free_slotid and fix-up related comments. As per review comment 21/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use __clear_bit for nfs4_free_slot] While at it, fix-up function comment. Part of review comment 22/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_last_bit in nfs4_free_slot to determine highest used slot.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:16 +08:00
tbl->highest_used_slotid = slotid;
else
tbl->highest_used_slotid = -1;
}
dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
free_slotid, tbl->highest_used_slotid);
}
/*
* Signal state manager thread if session is drained
*/
static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
{
struct rpc_task *task;
if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
if (task)
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
return;
}
if (ses->fc_slot_table.highest_used_slotid != -1)
return;
dprintk("%s COMPLETE: Session Drained\n", __func__);
complete(&ses->complete);
}
static void nfs41_sequence_free_slot(const struct nfs_client *clp,
struct nfs4_sequence_res *res)
{
struct nfs4_slot_table *tbl;
tbl = &clp->cl_session->fc_slot_table;
if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
/* just wake up the next guy waiting since
* we may have not consumed a slot after all */
dprintk("%s: No slot\n", __func__);
return;
}
spin_lock(&tbl->slot_tbl_lock);
nfs4_free_slot(tbl, res->sr_slotid);
nfs41_check_drain_session_complete(clp->cl_session);
spin_unlock(&tbl->slot_tbl_lock);
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
}
nfs41: nfs41_sequence_done Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:18 +08:00
static void nfs41_sequence_done(struct nfs_client *clp,
struct nfs4_sequence_res *res,
int rpc_status)
{
unsigned long timestamp;
struct nfs4_slot_table *tbl;
struct nfs4_slot *slot;
/*
* sr_status remains 1 if an RPC level error occurred. The server
* may or may not have processed the sequence operation..
* Proceed as if the server received and processed the sequence
* operation.
*/
if (res->sr_status == 1)
res->sr_status = NFS_OK;
/* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
goto out;
/* Check the SEQUENCE operation status */
nfs41: nfs41_sequence_done Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:18 +08:00
if (res->sr_status == 0) {
tbl = &clp->cl_session->fc_slot_table;
slot = tbl->slots + res->sr_slotid;
nfs41: nfs41_sequence_done Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:18 +08:00
/* Update the slot's sequence and clientid lease timer */
++slot->seq_nr;
timestamp = res->sr_renewal_time;
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal, timestamp))
clp->cl_last_renewal = timestamp;
spin_unlock(&clp->cl_lock);
/* Check sequence flags */
nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
nfs41: nfs41_sequence_done Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:18 +08:00
}
out:
/* The session may be reset by one of the error handlers. */
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
nfs41_sequence_free_slot(clp, res);
}
/*
* nfs4_find_slot - efficiently look for a free slot
*
* nfs4_find_slot looks for an unset bit in the used_slots bitmap.
* If found, we mark the slot as used, update the highest_used_slotid,
* and respectively set up the sequence operation args.
* The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
*
* Note: must be called with under the slot_tbl_lock.
*/
static u8
nfs4_find_slot(struct nfs4_slot_table *tbl)
{
int slotid;
u8 ret_id = NFS4_MAX_SLOT_TABLE;
BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
__func__, tbl->used_slots[0], tbl->highest_used_slotid,
tbl->max_slots);
slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
if (slotid >= tbl->max_slots)
goto out;
__set_bit(slotid, tbl->used_slots);
if (slotid > tbl->highest_used_slotid)
tbl->highest_used_slotid = slotid;
ret_id = slotid;
out:
dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
__func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
return ret_id;
}
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
static int nfs41_setup_sequence(struct nfs4_session *session,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply,
struct rpc_task *task)
{
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
struct nfs4_slot *slot;
struct nfs4_slot_table *tbl;
u8 slotid;
dprintk("--> %s\n", __func__);
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
/* slot already allocated? */
if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
return 0;
memset(res, 0, sizeof(*res));
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
tbl = &session->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
/*
* The state manager will wait until the slot table is empty.
* Schedule the reset thread
*/
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
nfs41: schedule async session reset Define a new session reset state which is set upon a sequence operation error in both the sync and async error handlers. Place all new requests and all but the last outstanding rpc on the slot_tbl_waitq. Spawn the recovery thread when the last slot is free. Call nfs4_proc_destroy_session, reinitialize the session, call nfs4_proc_create_session, clear the session reset state, and wake up the next task on the slot_tbl_waitq. Return the nfs4_proc_destroy_session status to the session reclaimer and check for NFS4ERR_BADSESSION and NFS4ERR_DEADSESSION. Other destroy session errors should be handled in nfs4_proc_destroy_session where the call can be retried with adjusted arguments. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> nfs41: make nfs4_wait_bit_killable public] nfs4_wait_bit_killable to be used by NFSv4.1 session recover logic. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: trigger the state manager for session reset] Replace the session reset state with the NFS4CLNT_SESSION_SETUP cl_state. Place all rpc tasks to sleep on the slot table waitqueue until the slot table is drained, then schedule state recovery and wait for it to complete. Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs41_session_recovery [ch] Replaced by using the nfs4_state_manager. Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: nfs4_wait_bit_killable only used locally] [nfs41: keep nfs4_wait_bit_killable static] [nfs41: keep const nfs_server in nfs4_handle_exception] [nfs41: remove session parameter from nfs4_find_slot] Signed-off-by: Andy Adamson <andros@netapp.com Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: resset the session from nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:43 +08:00
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s Schedule Session Reset\n", __func__);
return -EAGAIN;
nfs41: schedule async session reset Define a new session reset state which is set upon a sequence operation error in both the sync and async error handlers. Place all new requests and all but the last outstanding rpc on the slot_tbl_waitq. Spawn the recovery thread when the last slot is free. Call nfs4_proc_destroy_session, reinitialize the session, call nfs4_proc_create_session, clear the session reset state, and wake up the next task on the slot_tbl_waitq. Return the nfs4_proc_destroy_session status to the session reclaimer and check for NFS4ERR_BADSESSION and NFS4ERR_DEADSESSION. Other destroy session errors should be handled in nfs4_proc_destroy_session where the call can be retried with adjusted arguments. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> nfs41: make nfs4_wait_bit_killable public] nfs4_wait_bit_killable to be used by NFSv4.1 session recover logic. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: trigger the state manager for session reset] Replace the session reset state with the NFS4CLNT_SESSION_SETUP cl_state. Place all rpc tasks to sleep on the slot table waitqueue until the slot table is drained, then schedule state recovery and wait for it to complete. Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs41_session_recovery [ch] Replaced by using the nfs4_state_manager. Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: nfs4_wait_bit_killable only used locally] [nfs41: keep nfs4_wait_bit_killable static] [nfs41: keep const nfs_server in nfs4_handle_exception] [nfs41: remove session parameter from nfs4_find_slot] Signed-off-by: Andy Adamson <andros@netapp.com Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: resset the session from nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:43 +08:00
}
if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s enforce FIFO order\n", __func__);
return -EAGAIN;
}
slotid = nfs4_find_slot(tbl);
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
if (slotid == NFS4_MAX_SLOT_TABLE) {
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
spin_unlock(&tbl->slot_tbl_lock);
dprintk("<-- %s: no free slots\n", __func__);
return -EAGAIN;
}
spin_unlock(&tbl->slot_tbl_lock);
rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
slot = tbl->slots + slotid;
args->sa_session = session;
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
args->sa_slotid = slotid;
args->sa_cache_this = cache_reply;
dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
res->sr_session = session;
nfs41: setup_sequence method Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:15 +08:00
res->sr_slotid = slotid;
res->sr_renewal_time = jiffies;
/*
* sr_status is only set in decode_sequence, and so will remain
* set to 1 if an rpc level failure occurs.
*/
res->sr_status = 1;
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
return 0;
}
int nfs4_setup_sequence(struct nfs_client *clp,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply,
struct rpc_task *task)
{
int ret = 0;
dprintk("--> %s clp %p session %p sr_slotid %d\n",
__func__, clp, clp->cl_session, res->sr_slotid);
if (!nfs4_has_session(clp))
goto out;
ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
task);
if (ret && ret != -EAGAIN) {
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
/* terminate rpc task */
task->tk_status = ret;
task->tk_action = NULL;
}
out:
dprintk("<-- %s status=%d\n", __func__, ret);
return ret;
}
struct nfs41_call_sync_data {
struct nfs_client *clp;
struct nfs4_sequence_args *seq_args;
struct nfs4_sequence_res *seq_res;
int cache_reply;
};
static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
{
struct nfs41_call_sync_data *data = calldata;
dprintk("--> %s data->clp->cl_session %p\n", __func__,
data->clp->cl_session);
if (nfs4_setup_sequence(data->clp, data->seq_args,
data->seq_res, data->cache_reply, task))
return;
rpc_call_start(task);
}
static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs41_call_sync_prepare(task, calldata);
}
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
{
struct nfs41_call_sync_data *data = calldata;
nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
}
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
struct rpc_call_ops nfs41_call_sync_ops = {
.rpc_call_prepare = nfs41_call_sync_prepare,
.rpc_call_done = nfs41_call_sync_done,
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
};
struct rpc_call_ops nfs41_call_priv_sync_ops = {
.rpc_call_prepare = nfs41_call_priv_sync_prepare,
.rpc_call_done = nfs41_call_sync_done,
};
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
static int nfs4_call_sync_sequence(struct nfs_client *clp,
struct rpc_clnt *clnt,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply,
int privileged)
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
{
int ret;
struct rpc_task *task;
struct nfs41_call_sync_data data = {
.clp = clp,
.seq_args = args,
.seq_res = res,
.cache_reply = cache_reply,
};
struct rpc_task_setup task_setup = {
.rpc_client = clnt,
.rpc_message = msg,
.callback_ops = &nfs41_call_sync_ops,
.callback_data = &data
};
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
if (privileged)
task_setup.callback_ops = &nfs41_call_priv_sync_ops;
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
task = rpc_run_task(&task_setup);
if (IS_ERR(task))
ret = PTR_ERR(task);
else {
ret = task->tk_status;
rpc_put_task(task);
}
return ret;
}
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
int _nfs4_call_sync_session(struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply)
{
nfs41: nfs4_setup_sequence Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:13 +08:00
return nfs4_call_sync_sequence(server->nfs_client, server->client,
msg, args, res, cache_reply, 0);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
}
#endif /* CONFIG_NFS_V4_1 */
int _nfs4_call_sync(struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply)
{
args->sa_session = res->sr_session = NULL;
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return rpc_call_sync(server->client, msg, 0);
}
#define nfs4_call_sync(server, msg, args, res, cache_reply) \
(server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
&(res)->seq_res, (cache_reply))
nfs41: nfs41_sequence_done Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:18 +08:00
static void nfs4_sequence_done(const struct nfs_server *server,
struct nfs4_sequence_res *res, int rpc_status)
{
#ifdef CONFIG_NFS_V4_1
if (nfs4_has_session(server->nfs_client))
nfs41_sequence_done(server->nfs_client, res, rpc_status);
#endif /* CONFIG_NFS_V4_1 */
}
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
{
struct nfs_inode *nfsi = NFS_I(dir);
spin_lock(&dir->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
nfs_force_lookup_revalidate(dir);
nfsi->change_attr = cinfo->after;
spin_unlock(&dir->i_lock);
}
struct nfs4_opendata {
struct kref kref;
struct nfs_openargs o_arg;
struct nfs_openres o_res;
struct nfs_open_confirmargs c_arg;
struct nfs_open_confirmres c_res;
struct nfs_fattr f_attr;
struct nfs_fattr dir_attr;
struct path path;
struct dentry *dir;
struct nfs4_state_owner *owner;
struct nfs4_state *state;
struct iattr attrs;
unsigned long timestamp;
unsigned int rpc_done : 1;
int rpc_status;
int cancelled;
};
static void nfs4_init_opendata_res(struct nfs4_opendata *p)
{
p->o_res.f_attr = &p->f_attr;
p->o_res.dir_attr = &p->dir_attr;
p->o_res.seqid = p->o_arg.seqid;
p->c_res.seqid = p->c_arg.seqid;
p->o_res.server = p->o_arg.server;
nfs_fattr_init(&p->f_attr);
nfs_fattr_init(&p->dir_attr);
p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
}
static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
struct nfs4_state_owner *sp, fmode_t fmode, int flags,
const struct iattr *attrs)
{
struct dentry *parent = dget_parent(path->dentry);
struct inode *dir = parent->d_inode;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs4_opendata *p;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL)
goto err;
p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
if (p->o_arg.seqid == NULL)
goto err_free;
p->path.mnt = mntget(path->mnt);
p->path.dentry = dget(path->dentry);
p->dir = parent;
p->owner = sp;
atomic_inc(&sp->so_count);
p->o_arg.fh = NFS_FH(dir);
p->o_arg.open_flags = flags;
p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
p->o_arg.clientid = server->nfs_client->cl_clientid;
p->o_arg.id = sp->so_owner_id.id;
p->o_arg.name = &p->path.dentry->d_name;
p->o_arg.server = server;
p->o_arg.bitmask = server->attr_bitmask;
p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
if (flags & O_EXCL) {
if (nfs4_has_persistent_session(server->nfs_client)) {
/* GUARDED */
p->o_arg.u.attrs = &p->attrs;
memcpy(&p->attrs, attrs, sizeof(p->attrs));
} else { /* EXCLUSIVE4_1 */
u32 *s = (u32 *) p->o_arg.u.verifier.data;
s[0] = jiffies;
s[1] = current->pid;
}
} else if (flags & O_CREAT) {
p->o_arg.u.attrs = &p->attrs;
memcpy(&p->attrs, attrs, sizeof(p->attrs));
}
p->c_arg.fh = &p->o_res.fh;
p->c_arg.stateid = &p->o_res.stateid;
p->c_arg.seqid = p->o_arg.seqid;
nfs4_init_opendata_res(p);
kref_init(&p->kref);
return p;
err_free:
kfree(p);
err:
dput(parent);
return NULL;
}
static void nfs4_opendata_free(struct kref *kref)
{
struct nfs4_opendata *p = container_of(kref,
struct nfs4_opendata, kref);
nfs_free_seqid(p->o_arg.seqid);
if (p->state != NULL)
nfs4_put_open_state(p->state);
nfs4_put_state_owner(p->owner);
dput(p->dir);
path_put(&p->path);
kfree(p);
}
static void nfs4_opendata_put(struct nfs4_opendata *p)
{
if (p != NULL)
kref_put(&p->kref, nfs4_opendata_free);
}
static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
{
int ret;
ret = rpc_wait_for_completion_task(task);
return ret;
}
static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
{
int ret = 0;
if (open_mode & O_EXCL)
goto out;
switch (mode & (FMODE_READ|FMODE_WRITE)) {
case FMODE_READ:
ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
&& state->n_rdonly != 0;
break;
case FMODE_WRITE:
ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
&& state->n_wronly != 0;
break;
case FMODE_READ|FMODE_WRITE:
ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
&& state->n_rdwr != 0;
}
out:
return ret;
}
static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
{
if ((delegation->type & fmode) != fmode)
return 0;
if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
return 0;
nfs_mark_delegation_referenced(delegation);
return 1;
}
static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
{
switch (fmode) {
case FMODE_WRITE:
state->n_wronly++;
break;
case FMODE_READ:
state->n_rdonly++;
break;
case FMODE_READ|FMODE_WRITE:
state->n_rdwr++;
}
nfs4_state_set_mode_locked(state, state->state | fmode);
}
static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
{
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
switch (fmode) {
case FMODE_READ:
set_bit(NFS_O_RDONLY_STATE, &state->flags);
break;
case FMODE_WRITE:
set_bit(NFS_O_WRONLY_STATE, &state->flags);
break;
case FMODE_READ|FMODE_WRITE:
set_bit(NFS_O_RDWR_STATE, &state->flags);
}
}
static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
{
write_seqlock(&state->seqlock);
nfs_set_open_stateid_locked(state, stateid, fmode);
write_sequnlock(&state->seqlock);
}
static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
{
/*
* Protect the call to nfs4_state_set_mode_locked and
* serialise the stateid update
*/
write_seqlock(&state->seqlock);
if (deleg_stateid != NULL) {
memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
set_bit(NFS_DELEGATED_STATE, &state->flags);
}
if (open_stateid != NULL)
nfs_set_open_stateid_locked(state, open_stateid, fmode);
write_sequnlock(&state->seqlock);
spin_lock(&state->owner->so_lock);
update_open_stateflags(state, fmode);
spin_unlock(&state->owner->so_lock);
}
static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_delegation *deleg_cur;
int ret = 0;
fmode &= (FMODE_READ|FMODE_WRITE);
rcu_read_lock();
deleg_cur = rcu_dereference(nfsi->delegation);
if (deleg_cur == NULL)
goto no_delegation;
spin_lock(&deleg_cur->lock);
if (nfsi->delegation != deleg_cur ||
(deleg_cur->type & fmode) != fmode)
goto no_delegation_unlock;
if (delegation == NULL)
delegation = &deleg_cur->stateid;
else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
goto no_delegation_unlock;
nfs_mark_delegation_referenced(deleg_cur);
__update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
ret = 1;
no_delegation_unlock:
spin_unlock(&deleg_cur->lock);
no_delegation:
rcu_read_unlock();
if (!ret && open_stateid != NULL) {
__update_open_stateid(state, open_stateid, NULL, fmode);
ret = 1;
}
return ret;
}
static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
{
struct nfs_delegation *delegation;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation == NULL || (delegation->type & fmode) == fmode) {
rcu_read_unlock();
return;
}
rcu_read_unlock();
nfs_inode_return_delegation(inode);
}
static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
{
struct nfs4_state *state = opendata->state;
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_delegation *delegation;
int open_mode = opendata->o_arg.open_flags & O_EXCL;
fmode_t fmode = opendata->o_arg.fmode;
nfs4_stateid stateid;
int ret = -EAGAIN;
for (;;) {
if (can_open_cached(state, fmode, open_mode)) {
spin_lock(&state->owner->so_lock);
if (can_open_cached(state, fmode, open_mode)) {
update_open_stateflags(state, fmode);
spin_unlock(&state->owner->so_lock);
goto out_return_state;
}
spin_unlock(&state->owner->so_lock);
}
rcu_read_lock();
delegation = rcu_dereference(nfsi->delegation);
if (delegation == NULL ||
!can_open_delegated(delegation, fmode)) {
rcu_read_unlock();
break;
}
/* Save the delegation */
memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
rcu_read_unlock();
ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
if (ret != 0)
goto out;
ret = -EAGAIN;
/* Try to update the stateid using the delegation */
if (update_open_stateid(state, NULL, &stateid, fmode))
goto out_return_state;
}
out:
return ERR_PTR(ret);
out_return_state:
atomic_inc(&state->count);
return state;
}
static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
{
struct inode *inode;
struct nfs4_state *state = NULL;
struct nfs_delegation *delegation;
int ret;
if (!data->rpc_done) {
state = nfs4_try_open_cached(data);
goto out;
}
ret = -EAGAIN;
if (!(data->f_attr.valid & NFS_ATTR_FATTR))
goto err;
inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
ret = PTR_ERR(inode);
if (IS_ERR(inode))
goto err;
ret = -ENOMEM;
state = nfs4_get_open_state(inode, data->owner);
if (state == NULL)
goto err_put_inode;
if (data->o_res.delegation_type != 0) {
int delegation_flags = 0;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation)
delegation_flags = delegation->flags;
rcu_read_unlock();
if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
nfs_inode_set_delegation(state->inode,
data->owner->so_cred,
&data->o_res);
else
nfs_inode_reclaim_delegation(state->inode,
data->owner->so_cred,
&data->o_res);
}
update_open_stateid(state, &data->o_res.stateid, NULL,
data->o_arg.fmode);
iput(inode);
out:
return state;
err_put_inode:
iput(inode);
err:
return ERR_PTR(ret);
}
static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_open_context *ctx;
spin_lock(&state->inode->i_lock);
list_for_each_entry(ctx, &nfsi->open_files, list) {
if (ctx->state != state)
continue;
get_nfs_open_context(ctx);
spin_unlock(&state->inode->i_lock);
return ctx;
}
spin_unlock(&state->inode->i_lock);
return ERR_PTR(-ENOENT);
}
static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
{
struct nfs4_opendata *opendata;
opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
if (opendata == NULL)
return ERR_PTR(-ENOMEM);
opendata->state = state;
atomic_inc(&state->count);
return opendata;
}
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
{
struct nfs4_state *newstate;
int ret;
opendata->o_arg.open_flags = 0;
opendata->o_arg.fmode = fmode;
memset(&opendata->o_res, 0, sizeof(opendata->o_res));
memset(&opendata->c_res, 0, sizeof(opendata->c_res));
nfs4_init_opendata_res(opendata);
ret = _nfs4_recover_proc_open(opendata);
if (ret != 0)
return ret;
newstate = nfs4_opendata_to_nfs4_state(opendata);
if (IS_ERR(newstate))
return PTR_ERR(newstate);
nfs4_close_state(&opendata->path, newstate, fmode);
*res = newstate;
return 0;
}
static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
{
struct nfs4_state *newstate;
int ret;
/* memory barrier prior to reading state->n_* */
clear_bit(NFS_DELEGATED_STATE, &state->flags);
smp_rmb();
if (state->n_rdwr != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
if (newstate != state)
return -ESTALE;
}
if (state->n_wronly != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
if (newstate != state)
return -ESTALE;
}
if (state->n_rdonly != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
if (ret != 0)
return ret;
if (newstate != state)
return -ESTALE;
}
/*
* We may have performed cached opens for all three recoveries.
* Check if we need to update the current stateid.
*/
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
write_seqlock(&state->seqlock);
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
write_sequnlock(&state->seqlock);
}
return 0;
}
/*
* OPEN_RECLAIM:
* reclaim state on the server after a reboot.
*/
static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
{
struct nfs_delegation *delegation;
struct nfs4_opendata *opendata;
fmode_t delegation_type = 0;
int status;
opendata = nfs4_open_recoverdata_alloc(ctx, state);
if (IS_ERR(opendata))
return PTR_ERR(opendata);
opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
opendata->o_arg.fh = NFS_FH(state->inode);
rcu_read_lock();
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
NFSv4: Fix a typo in _nfs4_do_open_reclaim This should fix the following Oops reported by Jeff Garzik: kernel BUG at fs/nfs/nfs4xdr.c:1040! invalid opcode: 0000 [1] SMP CPU 0 Modules linked in: nfs lockd sunrpc af_packet ipv6 cpufreq_ondemand acpi_cpufreq battery floppy nvram sg snd_hda_intel ata_generic snd_pcm_oss snd_mixer_oss snd_pcm i2c_i801 snd_page_alloc e1000 firewire_ohci ata_piix i2c_core sr_mod cdrom sata_sil ahci libata sd_mod scsi_mod ext3 jbd ehci_hcd uhci_hcd Pid: 16353, comm: 10.10.10.1-recl Not tainted 2.6.23-rc3 #1 RIP: 0010:[<ffffffff88240980>] [<ffffffff88240980>] :nfs:encode_open+0x1c0/0x330 RSP: 0018:ffff8100467c5c60 EFLAGS: 00010202 RAX: ffff81000f89b8b8 RBX: 00000000697a6f6d RCX: ffff81000f89b8b8 RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffff8100467c5c80 RBP: ffff8100467c5c80 R08: ffff81000f89bc30 R09: ffff81000f89b83f R10: 0000000000000001 R11: ffffffff881e79e0 R12: ffff81003cbd1808 R13: ffff81000f89b860 R14: ffff81005fc984e0 R15: ffffffff88240af0 FS: 0000000000000000(0000) GS:ffffffff8052a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00002adb9e51a030 CR3: 000000007ea7e000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process 10.10.10.1-recl (pid: 16353, threadinfo ffff8100467c4000, task ffff8100038ce780) Stack: ffff81004aeb6a40 ffff81003cbd1808 ffff81003cbd1808 ffffffff88240b5d ffff81000f89b8bc ffff81005fc984e8 ffff81000f89bc30 ffff81005fc984e8 0000000300000000 0000000000000000 0000000000000000 ffff81003cbd1800 Call Trace: [<ffffffff88240b5d>] :nfs:nfs4_xdr_enc_open_noattr+0x6d/0x90 [<ffffffff881e74b7>] :sunrpc:rpcauth_wrap_req+0x97/0xf0 [<ffffffff88240af0>] :nfs:nfs4_xdr_enc_open_noattr+0x0/0x90 [<ffffffff881df57a>] :sunrpc:call_transmit+0x18a/0x290 [<ffffffff881e5e7b>] :sunrpc:__rpc_execute+0x6b/0x290 [<ffffffff881dff76>] :sunrpc:rpc_do_run_task+0x76/0xd0 [<ffffffff882373f6>] :nfs:_nfs4_proc_open+0x76/0x230 [<ffffffff88237a2e>] :nfs:nfs4_open_recover_helper+0x5e/0xc0 [<ffffffff88237b74>] :nfs:nfs4_open_recover+0xe4/0x120 [<ffffffff88238e14>] :nfs:nfs4_open_reclaim+0xa4/0xf0 [<ffffffff882413c5>] :nfs:nfs4_reclaim_open_state+0x55/0x1b0 [<ffffffff882417ea>] :nfs:reclaimer+0x2ca/0x390 [<ffffffff88241520>] :nfs:reclaimer+0x0/0x390 [<ffffffff8024e59b>] kthread+0x4b/0x80 [<ffffffff8020cad8>] child_rip+0xa/0x12 [<ffffffff8024e550>] kthread+0x0/0x80 [<ffffffff8020cace>] child_rip+0x0/0x12 Code: 0f 0b eb fe 48 89 ef c7 00 00 00 00 02 be 08 00 00 00 e8 79 RIP [<ffffffff88240980>] :nfs:encode_open+0x1c0/0x330 RSP <ffff8100467c5c60> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-08-27 21:57:46 +08:00
delegation_type = delegation->type;
rcu_read_unlock();
opendata->o_arg.u.delegation_type = delegation_type;
status = nfs4_open_recover(opendata, state);
nfs4_opendata_put(opendata);
return status;
}
static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_do_open_reclaim(ctx, state);
if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
struct nfs_open_context *ctx;
int ret;
ctx = nfs4_state_find_open_context(state);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = nfs4_do_open_reclaim(ctx, state);
put_nfs_open_context(ctx);
return ret;
}
static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
{
struct nfs4_opendata *opendata;
int ret;
opendata = nfs4_open_recoverdata_alloc(ctx, state);
if (IS_ERR(opendata))
return PTR_ERR(opendata);
opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
memcpy(opendata->o_arg.u.delegation.data, stateid->data,
sizeof(opendata->o_arg.u.delegation.data));
ret = nfs4_open_recover(opendata, state);
nfs4_opendata_put(opendata);
return ret;
}
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
{
struct nfs4_exception exception = { };
struct nfs_server *server = NFS_SERVER(state->inode);
int err;
do {
err = _nfs4_open_delegation_recall(ctx, state, stateid);
switch (err) {
case 0:
case -ENOENT:
case -ESTALE:
goto out;
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
case -NFS4ERR_DEADSESSION:
nfs4_schedule_state_recovery(
server->nfs_client);
goto out;
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
/* Don't recall a delegation if it was lost */
nfs4_schedule_state_recovery(server->nfs_client);
goto out;
case -ERESTARTSYS:
/*
* The show must go on: exit, but mark the
* stateid as needing recovery.
*/
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
case -ENOMEM:
err = 0;
goto out;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
out:
return err;
}
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
{
struct nfs4_opendata *data = calldata;
data->rpc_status = task->tk_status;
if (RPC_ASSASSINATED(task))
return;
if (data->rpc_status == 0) {
memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
sizeof(data->o_res.stateid.data));
nfs_confirm_seqid(&data->owner->so_seqid, 0);
renew_lease(data->o_res.server, data->timestamp);
data->rpc_done = 1;
}
}
static void nfs4_open_confirm_release(void *calldata)
{
struct nfs4_opendata *data = calldata;
struct nfs4_state *state = NULL;
/* If this request hasn't been cancelled, do nothing */
if (data->cancelled == 0)
goto out_free;
/* In case of error, no cleanup! */
if (!data->rpc_done)
goto out_free;
state = nfs4_opendata_to_nfs4_state(data);
if (!IS_ERR(state))
nfs4_close_state(&data->path, state, data->o_arg.fmode);
out_free:
nfs4_opendata_put(data);
}
static const struct rpc_call_ops nfs4_open_confirm_ops = {
.rpc_call_done = nfs4_open_confirm_done,
.rpc_release = nfs4_open_confirm_release,
};
/*
* Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
*/
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
{
struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
.rpc_argp = &data->c_arg,
.rpc_resp = &data->c_res,
.rpc_cred = data->owner->so_cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = server->client,
.rpc_message = &msg,
.callback_ops = &nfs4_open_confirm_ops,
.callback_data = data,
.workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC,
};
int status;
kref_get(&data->kref);
data->rpc_done = 0;
data->rpc_status = 0;
data->timestamp = jiffies;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
status = nfs4_wait_for_completion_rpc_task(task);
if (status != 0) {
data->cancelled = 1;
smp_wmb();
} else
status = data->rpc_status;
rpc_put_task(task);
return status;
}
static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
{
struct nfs4_opendata *data = calldata;
struct nfs4_state_owner *sp = data->owner;
if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
return;
/*
* Check if we still need to send an OPEN call, or if we can use
* a delegation instead.
*/
if (data->state != NULL) {
struct nfs_delegation *delegation;
if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
goto out_no_action;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
if (delegation != NULL &&
test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
rcu_read_unlock();
goto out_no_action;
}
rcu_read_unlock();
}
/* Update sequence id. */
data->o_arg.id = sp->so_owner_id.id;
data->o_arg.clientid = sp->so_client->cl_clientid;
if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
}
data->timestamp = jiffies;
if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
&data->o_arg.seq_args,
&data->o_res.seq_res, 1, task))
return;
rpc_call_start(task);
return;
out_no_action:
task->tk_action = NULL;
}
static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs4_open_prepare(task, calldata);
}
static void nfs4_open_done(struct rpc_task *task, void *calldata)
{
struct nfs4_opendata *data = calldata;
data->rpc_status = task->tk_status;
nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
task->tk_status);
if (RPC_ASSASSINATED(task))
return;
if (task->tk_status == 0) {
switch (data->o_res.f_attr->mode & S_IFMT) {
case S_IFREG:
break;
case S_IFLNK:
data->rpc_status = -ELOOP;
break;
case S_IFDIR:
data->rpc_status = -EISDIR;
break;
default:
data->rpc_status = -ENOTDIR;
}
renew_lease(data->o_res.server, data->timestamp);
if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
nfs_confirm_seqid(&data->owner->so_seqid, 0);
}
data->rpc_done = 1;
}
static void nfs4_open_release(void *calldata)
{
struct nfs4_opendata *data = calldata;
struct nfs4_state *state = NULL;
/* If this request hasn't been cancelled, do nothing */
if (data->cancelled == 0)
goto out_free;
/* In case of error, no cleanup! */
if (data->rpc_status != 0 || !data->rpc_done)
goto out_free;
/* In case we need an open_confirm, no cleanup! */
if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
goto out_free;
state = nfs4_opendata_to_nfs4_state(data);
if (!IS_ERR(state))
nfs4_close_state(&data->path, state, data->o_arg.fmode);
out_free:
nfs4_opendata_put(data);
}
static const struct rpc_call_ops nfs4_open_ops = {
.rpc_call_prepare = nfs4_open_prepare,
.rpc_call_done = nfs4_open_done,
.rpc_release = nfs4_open_release,
};
static const struct rpc_call_ops nfs4_recover_open_ops = {
.rpc_call_prepare = nfs4_recover_open_prepare,
.rpc_call_done = nfs4_open_done,
.rpc_release = nfs4_open_release,
};
static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
{
struct inode *dir = data->dir->d_inode;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_openargs *o_arg = &data->o_arg;
struct nfs_openres *o_res = &data->o_res;
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
.rpc_argp = o_arg,
.rpc_resp = o_res,
.rpc_cred = data->owner->so_cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = server->client,
.rpc_message = &msg,
.callback_ops = &nfs4_open_ops,
.callback_data = data,
.workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC,
};
int status;
kref_get(&data->kref);
data->rpc_done = 0;
data->rpc_status = 0;
data->cancelled = 0;
if (isrecover)
task_setup_data.callback_ops = &nfs4_recover_open_ops;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
status = nfs4_wait_for_completion_rpc_task(task);
if (status != 0) {
data->cancelled = 1;
smp_wmb();
} else
status = data->rpc_status;
rpc_put_task(task);
return status;
}
static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
{
struct inode *dir = data->dir->d_inode;
struct nfs_openres *o_res = &data->o_res;
int status;
status = nfs4_run_open_task(data, 1);
if (status != 0 || !data->rpc_done)
return status;
nfs_refresh_inode(dir, o_res->dir_attr);
if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
status = _nfs4_proc_open_confirm(data);
if (status != 0)
return status;
}
return status;
}
/*
* Note: On error, nfs4_proc_open will free the struct nfs4_opendata
*/
static int _nfs4_proc_open(struct nfs4_opendata *data)
{
struct inode *dir = data->dir->d_inode;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_openargs *o_arg = &data->o_arg;
struct nfs_openres *o_res = &data->o_res;
int status;
status = nfs4_run_open_task(data, 0);
if (status != 0 || !data->rpc_done)
return status;
if (o_arg->open_flags & O_CREAT) {
update_changeattr(dir, &o_res->cinfo);
nfs_post_op_update_inode(dir, o_res->dir_attr);
} else
nfs_refresh_inode(dir, o_res->dir_attr);
if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
status = _nfs4_proc_open_confirm(data);
if (status != 0)
return status;
}
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
return 0;
}
static int nfs4_recover_expired_lease(struct nfs_server *server)
{
struct nfs_client *clp = server->nfs_client;
unsigned int loop;
int ret;
for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
ret = nfs4_wait_clnt_recover(clp);
if (ret != 0)
break;
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
!test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
break;
nfs4_schedule_state_recovery(clp);
ret = -EIO;
}
return ret;
}
/*
* OPEN_EXPIRED:
* reclaim state on the server after a network partition.
* Assumes caller holds the appropriate lock
*/
static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
{
struct nfs4_opendata *opendata;
int ret;
opendata = nfs4_open_recoverdata_alloc(ctx, state);
if (IS_ERR(opendata))
return PTR_ERR(opendata);
ret = nfs4_open_recover(opendata, state);
if (ret == -ESTALE)
d_drop(ctx->path.dentry);
nfs4_opendata_put(opendata);
return ret;
}
static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_open_expired(ctx, state);
switch (err) {
default:
goto out;
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
nfs4_handle_exception(server, err, &exception);
err = 0;
}
} while (exception.retry);
out:
return err;
}
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
struct nfs_open_context *ctx;
int ret;
ctx = nfs4_state_find_open_context(state);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = nfs4_do_open_expired(ctx, state);
put_nfs_open_context(ctx);
return ret;
}
/*
* on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
* fields corresponding to attributes that were used to store the verifier.
* Make sure we clobber those fields in the later setattr call
*/
static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
{
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
!(sattr->ia_valid & ATTR_ATIME_SET))
sattr->ia_valid |= ATTR_ATIME;
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
!(sattr->ia_valid & ATTR_MTIME_SET))
sattr->ia_valid |= ATTR_MTIME;
}
/*
* Returns a referenced nfs4_state
*/
static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
{
struct nfs4_state_owner *sp;
struct nfs4_state *state = NULL;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs4_opendata *opendata;
int status;
/* Protect against reboot recovery conflicts */
status = -ENOMEM;
if (!(sp = nfs4_get_state_owner(server, cred))) {
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
goto out_err;
}
status = nfs4_recover_expired_lease(server);
if (status != 0)
goto err_put_state_owner;
if (path->dentry->d_inode != NULL)
nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
status = -ENOMEM;
opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
if (opendata == NULL)
goto err_put_state_owner;
if (path->dentry->d_inode != NULL)
opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
status = _nfs4_proc_open(opendata);
if (status != 0)
goto err_opendata_put;
if (opendata->o_arg.open_flags & O_EXCL)
nfs4_exclusive_attrset(opendata, sattr);
state = nfs4_opendata_to_nfs4_state(opendata);
status = PTR_ERR(state);
if (IS_ERR(state))
goto err_opendata_put;
if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
nfs4_opendata_put(opendata);
nfs4_put_state_owner(sp);
*res = state;
return 0;
err_opendata_put:
nfs4_opendata_put(opendata);
err_put_state_owner:
nfs4_put_state_owner(sp);
out_err:
*res = NULL;
return status;
}
static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
{
struct nfs4_exception exception = { };
struct nfs4_state *res;
int status;
do {
status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
if (status == 0)
break;
/* NOTE: BAD_SEQID means the server and client disagree about the
* book-keeping w.r.t. state-changing operations
* (OPEN/CLOSE/LOCK/LOCKU...)
* It is actually a sign of a bug on the client or on the server.
*
* If we receive a BAD_SEQID error in the particular case of
* doing an OPEN, we assume that nfs_increment_open_seqid() will
* have unhashed the old state_owner for us, and that we can
* therefore safely retry using a new one. We should still warn
* the user though...
*/
if (status == -NFS4ERR_BAD_SEQID) {
printk(KERN_WARNING "NFS: v4 server %s "
" returned a bad sequence-id error!\n",
NFS_SERVER(dir)->nfs_client->cl_hostname);
exception.retry = 1;
continue;
}
/*
* BAD_STATEID on OPEN means that the server cancelled our
* state before it received the OPEN_CONFIRM.
* Recover by retrying the request as per the discussion
* on Page 181 of RFC3530.
*/
if (status == -NFS4ERR_BAD_STATEID) {
exception.retry = 1;
continue;
}
if (status == -EAGAIN) {
/* We must have found a delegation */
exception.retry = 1;
continue;
}
res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
status, &exception));
} while (exception.retry);
return res;
}
static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_fattr *fattr, struct iattr *sattr,
struct nfs4_state *state)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_setattrargs arg = {
.fh = NFS_FH(inode),
.iap = sattr,
.server = server,
.bitmask = server->attr_bitmask,
};
struct nfs_setattrres res = {
.fattr = fattr,
.server = server,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = cred,
};
unsigned long timestamp = jiffies;
int status;
nfs_fattr_init(fattr);
if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
/* Use that stateid */
} else if (state != NULL) {
nfs4_copy_stateid(&arg.stateid, state, current->files);
} else
memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &arg, &res, 1);
if (status == 0 && state != NULL)
renew_lease(server, timestamp);
return status;
}
static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_fattr *fattr, struct iattr *sattr,
struct nfs4_state *state)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_do_setattr(inode, cred, fattr, sattr, state),
&exception);
} while (exception.retry);
return err;
}
struct nfs4_closedata {
struct path path;
struct inode *inode;
struct nfs4_state *state;
struct nfs_closeargs arg;
struct nfs_closeres res;
struct nfs_fattr fattr;
unsigned long timestamp;
};
static void nfs4_free_closedata(void *data)
{
struct nfs4_closedata *calldata = data;
struct nfs4_state_owner *sp = calldata->state->owner;
nfs4_put_open_state(calldata->state);
nfs_free_seqid(calldata->arg.seqid);
nfs4_put_state_owner(sp);
path_put(&calldata->path);
kfree(calldata);
}
static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
fmode_t fmode)
{
spin_lock(&state->owner->so_lock);
if (!(fmode & FMODE_READ))
clear_bit(NFS_O_RDONLY_STATE, &state->flags);
if (!(fmode & FMODE_WRITE))
clear_bit(NFS_O_WRONLY_STATE, &state->flags);
clear_bit(NFS_O_RDWR_STATE, &state->flags);
spin_unlock(&state->owner->so_lock);
}
static void nfs4_close_done(struct rpc_task *task, void *data)
{
struct nfs4_closedata *calldata = data;
struct nfs4_state *state = calldata->state;
struct nfs_server *server = NFS_SERVER(calldata->inode);
nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
if (RPC_ASSASSINATED(task))
return;
/* hmm. we are done with the inode, and in the process of freeing
* the state_owner. we keep this around to process errors
*/
switch (task->tk_status) {
case 0:
nfs_set_open_stateid(state, &calldata->res.stateid, 0);
renew_lease(server, calldata->timestamp);
nfs4_close_clear_stateid_flags(state,
calldata->arg.fmode);
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_EXPIRED:
if (calldata->arg.fmode == 0)
break;
default:
if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
rpc_restart_call_prepare(task);
}
nfs_release_seqid(calldata->arg.seqid);
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
}
static void nfs4_close_prepare(struct rpc_task *task, void *data)
{
struct nfs4_closedata *calldata = data;
struct nfs4_state *state = calldata->state;
int call_close = 0;
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
return;
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
spin_lock(&state->owner->so_lock);
/* Calculate the change in open mode */
if (state->n_rdwr == 0) {
if (state->n_rdonly == 0) {
call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
calldata->arg.fmode &= ~FMODE_READ;
}
if (state->n_wronly == 0) {
call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
calldata->arg.fmode &= ~FMODE_WRITE;
}
}
spin_unlock(&state->owner->so_lock);
if (!call_close) {
/* Note: exit _without_ calling nfs4_close_done */
task->tk_action = NULL;
return;
}
if (calldata->arg.fmode == 0)
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
nfs_fattr_init(calldata->res.fattr);
calldata->timestamp = jiffies;
if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
&calldata->arg.seq_args, &calldata->res.seq_res,
1, task))
return;
rpc_call_start(task);
}
static const struct rpc_call_ops nfs4_close_ops = {
.rpc_call_prepare = nfs4_close_prepare,
.rpc_call_done = nfs4_close_done,
.rpc_release = nfs4_free_closedata,
};
/*
* It is possible for data to be read/written from a mem-mapped file
* after the sys_close call (which hits the vfs layer as a flush).
* This means that we can't safely call nfsv4 close on a file until
* the inode is cleared. This in turn means that we are not good
* NFSv4 citizens - we do not indicate to the server to update the file's
* share state even when we are done with one of the three share
* stateid's in the inode.
*
* NOTE: Caller must be holding the sp->so_owner semaphore!
*/
int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_closedata *calldata;
struct nfs4_state_owner *sp = state->owner;
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
.rpc_cred = state->owner->so_cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = server->client,
.rpc_message = &msg,
.callback_ops = &nfs4_close_ops,
.workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC,
};
int status = -ENOMEM;
calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
if (calldata == NULL)
goto out;
calldata->inode = state->inode;
calldata->state = state;
calldata->arg.fh = NFS_FH(state->inode);
calldata->arg.stateid = &state->open_stateid;
/* Serialization for the sequence id */
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
if (calldata->arg.seqid == NULL)
goto out_free_calldata;
calldata->arg.fmode = 0;
calldata->arg.bitmask = server->cache_consistency_bitmask;
calldata->res.fattr = &calldata->fattr;
calldata->res.seqid = calldata->arg.seqid;
calldata->res.server = server;
calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
calldata->path.mnt = mntget(path->mnt);
calldata->path.dentry = dget(path->dentry);
msg.rpc_argp = &calldata->arg,
msg.rpc_resp = &calldata->res,
task_setup_data.callback_data = calldata;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
status = 0;
if (wait)
status = rpc_wait_for_completion_task(task);
rpc_put_task(task);
return status;
out_free_calldata:
kfree(calldata);
out:
nfs4_put_open_state(state);
nfs4_put_state_owner(sp);
return status;
}
static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
{
struct file *filp;
int ret;
/* If the open_intent is for execute, we have an extra check to make */
if (fmode & FMODE_EXEC) {
ret = nfs_may_open(state->inode,
state->owner->so_cred,
nd->intent.open.flags);
if (ret < 0)
goto out_close;
}
filp = lookup_instantiate_filp(nd, path->dentry, NULL);
if (!IS_ERR(filp)) {
struct nfs_open_context *ctx;
ctx = nfs_file_open_context(filp);
ctx->state = state;
return 0;
}
ret = PTR_ERR(filp);
out_close:
nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
return ret;
}
struct dentry *
nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
struct path path = {
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct dentry *parent;
struct iattr attr;
struct rpc_cred *cred;
struct nfs4_state *state;
struct dentry *res;
fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
if (nd->flags & LOOKUP_CREATE) {
attr.ia_mode = nd->intent.open.create_mode;
attr.ia_valid = ATTR_MODE;
if (!IS_POSIXACL(dir))
attr.ia_mode &= ~current_umask();
} else {
attr.ia_valid = 0;
BUG_ON(nd->intent.open.flags & O_CREAT);
}
cred = rpc_lookup_cred();
if (IS_ERR(cred))
return (struct dentry *)cred;
parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
nfs_block_sillyrename(parent);
state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
put_rpccred(cred);
if (IS_ERR(state)) {
if (PTR_ERR(state) == -ENOENT) {
d_add(dentry, NULL);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
}
nfs_unblock_sillyrename(parent);
return (struct dentry *)state;
}
res = d_add_unique(dentry, igrab(state->inode));
if (res != NULL)
path.dentry = res;
nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
nfs_unblock_sillyrename(parent);
nfs4_intent_set_file(nd, &path, state, fmode);
return res;
}
int
nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
{
struct path path = {
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct rpc_cred *cred;
struct nfs4_state *state;
fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
cred = rpc_lookup_cred();
if (IS_ERR(cred))
return PTR_ERR(cred);
state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
put_rpccred(cred);
if (IS_ERR(state)) {
switch (PTR_ERR(state)) {
case -EPERM:
case -EACCES:
case -EDQUOT:
case -ENOSPC:
case -EROFS:
lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
return 1;
default:
goto out_drop;
}
}
if (state->inode == dentry->d_inode) {
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
nfs4_intent_set_file(nd, &path, state, fmode);
return 1;
}
nfs4_close_sync(&path, state, fmode);
out_drop:
d_drop(dentry);
return 0;
}
static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
{
if (ctx->state == NULL)
return;
if (is_sync)
nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
else
nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
}
static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
{
struct nfs4_server_caps_arg args = {
.fhandle = fhandle,
};
struct nfs4_server_caps_res res = {};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
.rpc_argp = &args,
.rpc_resp = &res,
};
int status;
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &args, &res, 0);
if (status == 0) {
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
NFS_CAP_CTIME|NFS_CAP_MTIME);
if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
server->caps |= NFS_CAP_ACLS;
if (res.has_links != 0)
server->caps |= NFS_CAP_HARDLINKS;
if (res.has_symlinks != 0)
server->caps |= NFS_CAP_SYMLINKS;
if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
server->caps |= NFS_CAP_FILEID;
if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
server->caps |= NFS_CAP_MODE;
if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
server->caps |= NFS_CAP_NLINK;
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
server->caps |= NFS_CAP_OWNER;
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
server->caps |= NFS_CAP_OWNER_GROUP;
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
server->caps |= NFS_CAP_ATIME;
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
server->caps |= NFS_CAP_CTIME;
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
server->caps |= NFS_CAP_MTIME;
memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
server->acl_bitmask = res.acl_bitmask;
}
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return status;
}
int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_server_capabilities(server, fhandle),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs4_lookup_root_arg args = {
.bitmask = nfs4_fattr_bitmap,
};
struct nfs4_lookup_res res = {
.server = server,
.fattr = info->fattr,
.fh = fhandle,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs_fattr_init(info->fattr);
return nfs4_call_sync(server, &msg, &args, &res, 0);
}
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_lookup_root(server, fhandle, info),
&exception);
} while (exception.retry);
return err;
}
NFS: Share NFS superblocks per-protocol per-server per-FSID The attached patch makes NFS share superblocks between mounts from the same server and FSID over the same protocol. It does this by creating each superblock with a false root and returning the real root dentry in the vfsmount presented by get_sb(). The root dentry set starts off as an anonymous dentry if we don't already have the dentry for its inode, otherwise it simply returns the dentry we already have. We may thus end up with several trees of dentries in the superblock, and if at some later point one of anonymous tree roots is discovered by normal filesystem activity to be located in another tree within the superblock, the anonymous root is named and materialises attached to the second tree at the appropriate point. Why do it this way? Why not pass an extra argument to the mount() syscall to indicate the subpath and then pathwalk from the server root to the desired directory? You can't guarantee this will work for two reasons: (1) The root and intervening nodes may not be accessible to the client. With NFS2 and NFS3, for instance, mountd is called on the server to get the filehandle for the tip of a path. mountd won't give us handles for anything we don't have permission to access, and so we can't set up NFS inodes for such nodes, and so can't easily set up dentries (we'd have to have ghost inodes or something). With this patch we don't actually create dentries until we get handles from the server that we can use to set up their inodes, and we don't actually bind them into the tree until we know for sure where they go. (2) Inaccessible symbolic links. If we're asked to mount two exports from the server, eg: mount warthog:/warthog/aaa/xxx /mmm mount warthog:/warthog/bbb/yyy /nnn We may not be able to access anything nearer the root than xxx and yyy, but we may find out later that /mmm/www/yyy, say, is actually the same directory as the one mounted on /nnn. What we might then find out, for example, is that /warthog/bbb was actually a symbolic link to /warthog/aaa/xxx/www, but we can't actually determine that by talking to the server until /warthog is made available by NFS. This would lead to having constructed an errneous dentry tree which we can't easily fix. We can end up with a dentry marked as a directory when it should actually be a symlink, or we could end up with an apparently hardlinked directory. With this patch we need not make assumptions about the type of a dentry for which we can't retrieve information, nor need we assume we know its place in the grand scheme of things until we actually see that place. This patch reduces the possibility of aliasing in the inode and page caches for inodes that may be accessed by more than one NFS export. It also reduces the number of superblocks required for NFS where there are many NFS exports being used from a server (home directory server + autofs for example). This in turn makes it simpler to do local caching of network filesystems, as it can then be guaranteed that there won't be links from multiple inodes in separate superblocks to the same cache file. Obviously, cache aliasing between different levels of NFS protocol could still be a problem, but at least that gives us another key to use when indexing the cache. This patch makes the following changes: (1) The server record construction/destruction has been abstracted out into its own set of functions to make things easier to get right. These have been moved into fs/nfs/client.c. All the code in fs/nfs/client.c has to do with the management of connections to servers, and doesn't touch superblocks in any way; the remaining code in fs/nfs/super.c has to do with VFS superblock management. (2) The sequence of events undertaken by NFS mount is now reordered: (a) A volume representation (struct nfs_server) is allocated. (b) A server representation (struct nfs_client) is acquired. This may be allocated or shared, and is keyed on server address, port and NFS version. (c) If allocated, the client representation is initialised. The state member variable of nfs_client is used to prevent a race during initialisation from two mounts. (d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find the root filehandle for the mount (fs/nfs/getroot.c). For NFS2/3 we are given the root FH in advance. (e) The volume FSID is probed for on the root FH. (f) The volume representation is initialised from the FSINFO record retrieved on the root FH. (g) sget() is called to acquire a superblock. This may be allocated or shared, keyed on client pointer and FSID. (h) If allocated, the superblock is initialised. (i) If the superblock is shared, then the new nfs_server record is discarded. (j) The root dentry for this mount is looked up from the root FH. (k) The root dentry for this mount is assigned to the vfsmount. (3) nfs_readdir_lookup() creates dentries for each of the entries readdir() returns; this function now attaches disconnected trees from alternate roots that happen to be discovered attached to a directory being read (in the same way nfs_lookup() is made to do for lookup ops). The new d_materialise_unique() function is now used to do this, thus permitting the whole thing to be done under one set of locks, and thus avoiding any race between mount and lookup operations on the same directory. (4) The client management code uses a new debug facility: NFSDBG_CLIENT which is set by echoing 1024 to /proc/net/sunrpc/nfs_debug. (5) Clone mounts are now called xdev mounts. (6) Use the dentry passed to the statfs() op as the handle for retrieving fs statistics rather than the root dentry of the superblock (which is now a dummy). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-08-23 08:06:13 +08:00
/*
* get the file handle for the "/" directory on the server
*/
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
NFS: Share NFS superblocks per-protocol per-server per-FSID The attached patch makes NFS share superblocks between mounts from the same server and FSID over the same protocol. It does this by creating each superblock with a false root and returning the real root dentry in the vfsmount presented by get_sb(). The root dentry set starts off as an anonymous dentry if we don't already have the dentry for its inode, otherwise it simply returns the dentry we already have. We may thus end up with several trees of dentries in the superblock, and if at some later point one of anonymous tree roots is discovered by normal filesystem activity to be located in another tree within the superblock, the anonymous root is named and materialises attached to the second tree at the appropriate point. Why do it this way? Why not pass an extra argument to the mount() syscall to indicate the subpath and then pathwalk from the server root to the desired directory? You can't guarantee this will work for two reasons: (1) The root and intervening nodes may not be accessible to the client. With NFS2 and NFS3, for instance, mountd is called on the server to get the filehandle for the tip of a path. mountd won't give us handles for anything we don't have permission to access, and so we can't set up NFS inodes for such nodes, and so can't easily set up dentries (we'd have to have ghost inodes or something). With this patch we don't actually create dentries until we get handles from the server that we can use to set up their inodes, and we don't actually bind them into the tree until we know for sure where they go. (2) Inaccessible symbolic links. If we're asked to mount two exports from the server, eg: mount warthog:/warthog/aaa/xxx /mmm mount warthog:/warthog/bbb/yyy /nnn We may not be able to access anything nearer the root than xxx and yyy, but we may find out later that /mmm/www/yyy, say, is actually the same directory as the one mounted on /nnn. What we might then find out, for example, is that /warthog/bbb was actually a symbolic link to /warthog/aaa/xxx/www, but we can't actually determine that by talking to the server until /warthog is made available by NFS. This would lead to having constructed an errneous dentry tree which we can't easily fix. We can end up with a dentry marked as a directory when it should actually be a symlink, or we could end up with an apparently hardlinked directory. With this patch we need not make assumptions about the type of a dentry for which we can't retrieve information, nor need we assume we know its place in the grand scheme of things until we actually see that place. This patch reduces the possibility of aliasing in the inode and page caches for inodes that may be accessed by more than one NFS export. It also reduces the number of superblocks required for NFS where there are many NFS exports being used from a server (home directory server + autofs for example). This in turn makes it simpler to do local caching of network filesystems, as it can then be guaranteed that there won't be links from multiple inodes in separate superblocks to the same cache file. Obviously, cache aliasing between different levels of NFS protocol could still be a problem, but at least that gives us another key to use when indexing the cache. This patch makes the following changes: (1) The server record construction/destruction has been abstracted out into its own set of functions to make things easier to get right. These have been moved into fs/nfs/client.c. All the code in fs/nfs/client.c has to do with the management of connections to servers, and doesn't touch superblocks in any way; the remaining code in fs/nfs/super.c has to do with VFS superblock management. (2) The sequence of events undertaken by NFS mount is now reordered: (a) A volume representation (struct nfs_server) is allocated. (b) A server representation (struct nfs_client) is acquired. This may be allocated or shared, and is keyed on server address, port and NFS version. (c) If allocated, the client representation is initialised. The state member variable of nfs_client is used to prevent a race during initialisation from two mounts. (d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find the root filehandle for the mount (fs/nfs/getroot.c). For NFS2/3 we are given the root FH in advance. (e) The volume FSID is probed for on the root FH. (f) The volume representation is initialised from the FSINFO record retrieved on the root FH. (g) sget() is called to acquire a superblock. This may be allocated or shared, keyed on client pointer and FSID. (h) If allocated, the superblock is initialised. (i) If the superblock is shared, then the new nfs_server record is discarded. (j) The root dentry for this mount is looked up from the root FH. (k) The root dentry for this mount is assigned to the vfsmount. (3) nfs_readdir_lookup() creates dentries for each of the entries readdir() returns; this function now attaches disconnected trees from alternate roots that happen to be discovered attached to a directory being read (in the same way nfs_lookup() is made to do for lookup ops). The new d_materialise_unique() function is now used to do this, thus permitting the whole thing to be done under one set of locks, and thus avoiding any race between mount and lookup operations on the same directory. (4) The client management code uses a new debug facility: NFSDBG_CLIENT which is set by echoing 1024 to /proc/net/sunrpc/nfs_debug. (5) Clone mounts are now called xdev mounts. (6) Use the dentry passed to the statfs() op as the handle for retrieving fs statistics rather than the root dentry of the superblock (which is now a dummy). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-08-23 08:06:13 +08:00
struct nfs_fsinfo *info)
{
int status;
status = nfs4_lookup_root(server, fhandle, info);
if (status == 0)
status = nfs4_server_capabilities(server, fhandle);
if (status == 0)
status = nfs4_do_fsinfo(server, fhandle, info);
return nfs4_map_errors(status);
}
/*
* Get locations and (maybe) other attributes of a referral.
* Note that we'll actually follow the referral later when
* we detect fsid mismatch in inode revalidation
*/
static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
{
int status = -ENOMEM;
struct page *page = NULL;
struct nfs4_fs_locations *locations = NULL;
page = alloc_page(GFP_KERNEL);
if (page == NULL)
goto out;
locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
if (locations == NULL)
goto out;
status = nfs4_proc_fs_locations(dir, name, locations, page);
if (status != 0)
goto out;
/* Make sure server returned a different fsid for the referral */
if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
status = -EIO;
goto out;
}
memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
if (!fattr->mode)
fattr->mode = S_IFDIR;
memset(fhandle, 0, sizeof(struct nfs_fh));
out:
if (page)
__free_page(page);
if (locations)
kfree(locations);
return status;
}
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs4_getattr_arg args = {
.fh = fhandle,
.bitmask = server->attr_bitmask,
};
struct nfs4_getattr_res res = {
.fattr = fattr,
.server = server,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs_fattr_init(fattr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return nfs4_call_sync(server, &msg, &args, &res, 0);
}
static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_proc_getattr(server, fhandle, fattr),
&exception);
} while (exception.retry);
return err;
}
/*
* The file is not closed if it is opened due to the a request to change
* the size of the file. The open call will not be needed once the
* VFS layer lookup-intents are implemented.
*
* Close is called when the inode is destroyed.
* If we haven't opened the file for O_WRONLY, we
* need to in the size_change case to obtain a stateid.
*
* Got race?
* Because OPEN is always done by name in nfsv4, it is
* possible that we opened a different file by the same
* name. We can recognize this race condition, but we
* can't do anything about it besides returning an error.
*
* This will be fixed with VFS changes (lookup-intent).
*/
static int
nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
struct iattr *sattr)
{
struct inode *inode = dentry->d_inode;
struct rpc_cred *cred = NULL;
struct nfs4_state *state = NULL;
int status;
nfs_fattr_init(fattr);
/* Search for an existing open(O_WRITE) file */
if (sattr->ia_valid & ATTR_FILE) {
struct nfs_open_context *ctx;
ctx = nfs_file_open_context(sattr->ia_file);
if (ctx) {
cred = ctx->cred;
state = ctx->state;
}
}
status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
if (status == 0)
nfs_setattr_update_inode(inode, sattr);
return status;
}
static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
const struct qstr *name, struct nfs_fh *fhandle,
struct nfs_fattr *fattr)
{
int status;
struct nfs4_lookup_arg args = {
.bitmask = server->attr_bitmask,
.dir_fh = dirfh,
.name = name,
};
struct nfs4_lookup_res res = {
.server = server,
.fattr = fattr,
.fh = fhandle,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs_fattr_init(fattr);
dprintk("NFS call lookupfh %s\n", name->name);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &args, &res, 0);
dprintk("NFS reply lookupfh: %d\n", status);
return status;
}
static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
struct qstr *name, struct nfs_fh *fhandle,
struct nfs_fattr *fattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
/* FIXME: !!!! */
if (err == -NFS4ERR_MOVED) {
err = -EREMOTE;
break;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
int status;
dprintk("NFS call lookup %s\n", name->name);
status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
if (status == -NFS4ERR_MOVED)
status = nfs4_get_referral(dir, name, fattr, fhandle);
dprintk("NFS reply lookup: %d\n", status);
return status;
}
static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
_nfs4_proc_lookup(dir, name, fhandle, fattr),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_fattr fattr;
struct nfs4_accessargs args = {
.fh = NFS_FH(inode),
.bitmask = server->attr_bitmask,
};
struct nfs4_accessres res = {
.server = server,
.fattr = &fattr,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_cred = entry->cred,
};
int mode = entry->mask;
int status;
/*
* Determine which access bits we want to ask for...
*/
if (mode & MAY_READ)
args.access |= NFS4_ACCESS_READ;
if (S_ISDIR(inode->i_mode)) {
if (mode & MAY_WRITE)
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
if (mode & MAY_EXEC)
args.access |= NFS4_ACCESS_LOOKUP;
} else {
if (mode & MAY_WRITE)
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
if (mode & MAY_EXEC)
args.access |= NFS4_ACCESS_EXECUTE;
}
nfs_fattr_init(&fattr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &args, &res, 0);
if (!status) {
entry->mask = 0;
if (res.access & NFS4_ACCESS_READ)
entry->mask |= MAY_READ;
if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
entry->mask |= MAY_WRITE;
if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
entry->mask |= MAY_EXEC;
nfs_refresh_inode(inode, &fattr);
}
return status;
}
static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(inode),
_nfs4_proc_access(inode, entry),
&exception);
} while (exception.retry);
return err;
}
/*
* TODO: For the time being, we don't try to get any attributes
* along with any of the zero-copy operations READ, READDIR,
* READLINK, WRITE.
*
* In the case of the first three, we want to put the GETATTR
* after the read-type operation -- this is because it is hard
* to predict the length of a GETATTR response in v4, and thus
* align the READ data correctly. This means that the GETATTR
* may end up partially falling into the page cache, and we should
* shift it into the 'tail' of the xdr_buf before processing.
* To do this efficiently, we need to know the total length
* of data received, which doesn't seem to be available outside
* of the RPC layer.
*
* In the case of WRITE, we also want to put the GETATTR after
* the operation -- in this case because we want to make sure
* we get the post-operation mtime and size. This means that
* we can't use xdr_encode_pages() as written: we need a variant
* of it which would leave room in the 'tail' iovec.
*
* Both of these changes to the XDR layer would in fact be quite
* minor, but I decided to leave them for a subsequent patch.
*/
static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
unsigned int pgbase, unsigned int pglen)
{
struct nfs4_readlink args = {
.fh = NFS_FH(inode),
.pgbase = pgbase,
.pglen = pglen,
.pages = &page,
};
struct nfs4_readlink_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
}
static int nfs4_proc_readlink(struct inode *inode, struct page *page,
unsigned int pgbase, unsigned int pglen)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(inode),
_nfs4_proc_readlink(inode, page, pgbase, pglen),
&exception);
} while (exception.retry);
return err;
}
/*
* Got race?
* We will need to arrange for the VFS layer to provide an atomic open.
* Until then, this create/open method is prone to inefficiency and race
* conditions due to the lookup, create, and open VFS calls from sys_open()
* placed on the wire.
*
* Given the above sorry state of affairs, I'm simply sending an OPEN.
* The file will be opened again in the subsequent VFS open call
* (nfs4_proc_file_open).
*
* The open for read will just hang around to be used by any process that
* opens the file O_RDONLY. This will all be resolved with the VFS changes.
*/
static int
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags, struct nameidata *nd)
{
struct path path = {
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct nfs4_state *state;
struct rpc_cred *cred;
fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
int status = 0;
cred = rpc_lookup_cred();
if (IS_ERR(cred)) {
status = PTR_ERR(cred);
goto out;
}
state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d_drop(dentry);
if (IS_ERR(state)) {
status = PTR_ERR(state);
goto out_putcred;
}
d_add(dentry, igrab(state->inode));
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
if (flags & O_EXCL) {
struct nfs_fattr fattr;
status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
if (status == 0)
nfs_setattr_update_inode(state->inode, sattr);
nfs_post_op_update_inode(state->inode, &fattr);
}
if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
status = nfs4_intent_set_file(nd, &path, state, fmode);
else
nfs4_close_sync(&path, state, fmode);
out_putcred:
put_rpccred(cred);
out:
return status;
}
static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
{
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_removeargs args = {
.fh = NFS_FH(dir),
.name.len = name->len,
.name.name = name->name,
.bitmask = server->attr_bitmask,
};
struct nfs_removeres res = {
.server = server,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
.rpc_argp = &args,
.rpc_resp = &res,
};
int status;
nfs_fattr_init(&res.dir_attr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &args, &res, 1);
if (status == 0) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, &res.dir_attr);
}
return status;
}
static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
_nfs4_proc_remove(dir, name),
&exception);
} while (exception.retry);
return err;
}
static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_removeargs *args = msg->rpc_argp;
struct nfs_removeres *res = msg->rpc_resp;
args->bitmask = server->cache_consistency_bitmask;
res->server = server;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
}
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
struct nfs_removeres *res = task->tk_msg.rpc_resp;
nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
return 0;
update_changeattr(dir, &res->cinfo);
nfs_post_op_update_inode(dir, &res->dir_attr);
return 1;
}
static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_server *server = NFS_SERVER(old_dir);
struct nfs4_rename_arg arg = {
.old_dir = NFS_FH(old_dir),
.new_dir = NFS_FH(new_dir),
.old_name = old_name,
.new_name = new_name,
.bitmask = server->attr_bitmask,
};
struct nfs_fattr old_fattr, new_fattr;
struct nfs4_rename_res res = {
.server = server,
.old_fattr = &old_fattr,
.new_fattr = &new_fattr,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
nfs_fattr_init(res.old_fattr);
nfs_fattr_init(res.new_fattr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &arg, &res, 1);
if (!status) {
update_changeattr(old_dir, &res.old_cinfo);
nfs_post_op_update_inode(old_dir, res.old_fattr);
update_changeattr(new_dir, &res.new_cinfo);
nfs_post_op_update_inode(new_dir, res.new_fattr);
}
return status;
}
static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(old_dir),
_nfs4_proc_rename(old_dir, old_name,
new_dir, new_name),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_link_arg arg = {
.fh = NFS_FH(inode),
.dir_fh = NFS_FH(dir),
.name = name,
.bitmask = server->attr_bitmask,
};
struct nfs_fattr fattr, dir_attr;
struct nfs4_link_res res = {
.server = server,
.fattr = &fattr,
.dir_attr = &dir_attr,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
nfs_fattr_init(res.fattr);
nfs_fattr_init(res.dir_attr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &arg, &res, 1);
if (!status) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, res.dir_attr);
nfs_post_op_update_inode(inode, res.fattr);
}
return status;
}
static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(inode),
_nfs4_proc_link(inode, dir, name),
&exception);
} while (exception.retry);
return err;
}
struct nfs4_createdata {
struct rpc_message msg;
struct nfs4_create_arg arg;
struct nfs4_create_res res;
struct nfs_fh fh;
struct nfs_fattr fattr;
struct nfs_fattr dir_fattr;
};
static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
struct qstr *name, struct iattr *sattr, u32 ftype)
{
struct nfs4_createdata *data;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data != NULL) {
struct nfs_server *server = NFS_SERVER(dir);
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
data->msg.rpc_argp = &data->arg;
data->msg.rpc_resp = &data->res;
data->arg.dir_fh = NFS_FH(dir);
data->arg.server = server;
data->arg.name = name;
data->arg.attrs = sattr;
data->arg.ftype = ftype;
data->arg.bitmask = server->attr_bitmask;
data->res.server = server;
data->res.fh = &data->fh;
data->res.fattr = &data->fattr;
data->res.dir_fattr = &data->dir_fattr;
nfs_fattr_init(data->res.fattr);
nfs_fattr_init(data->res.dir_fattr);
}
return data;
}
static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
{
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
&data->arg, &data->res, 1);
if (status == 0) {
update_changeattr(dir, &data->res.dir_cinfo);
nfs_post_op_update_inode(dir, data->res.dir_fattr);
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
}
return status;
}
static void nfs4_free_createdata(struct nfs4_createdata *data)
{
kfree(data);
}
static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
struct page *page, unsigned int len, struct iattr *sattr)
{
struct nfs4_createdata *data;
int status = -ENAMETOOLONG;
if (len > NFS4_MAXPATHLEN)
goto out;
status = -ENOMEM;
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
if (data == NULL)
goto out;
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
data->arg.u.symlink.pages = &page;
data->arg.u.symlink.len = len;
status = nfs4_do_create(dir, dentry, data);
nfs4_free_createdata(data);
out:
return status;
}
static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
struct page *page, unsigned int len, struct iattr *sattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
_nfs4_proc_symlink(dir, dentry, page,
len, sattr),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
struct iattr *sattr)
{
struct nfs4_createdata *data;
int status = -ENOMEM;
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
if (data == NULL)
goto out;
status = nfs4_do_create(dir, dentry, data);
nfs4_free_createdata(data);
out:
return status;
}
static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
struct iattr *sattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
_nfs4_proc_mkdir(dir, dentry, sattr),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page *page, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs4_readdir_arg args = {
.fh = NFS_FH(dir),
.pages = &page,
.pgbase = 0,
.count = count,
.bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
};
struct nfs4_readdir_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_cred = cred,
};
int status;
dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
dentry->d_parent->d_name.name,
dentry->d_name.name,
(unsigned long long)cookie);
nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
res.pgbase = args.pgbase;
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
if (status == 0)
memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
nfs_invalidate_atime(dir);
dprintk("%s: returns %d\n", __func__, status);
return status;
}
static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page *page, unsigned int count, int plus)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
_nfs4_proc_readdir(dentry, cred, cookie,
page, count, plus),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
struct iattr *sattr, dev_t rdev)
{
struct nfs4_createdata *data;
int mode = sattr->ia_mode;
int status = -ENOMEM;
BUG_ON(!(sattr->ia_valid & ATTR_MODE));
BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
if (data == NULL)
goto out;
if (S_ISFIFO(mode))
data->arg.ftype = NF4FIFO;
else if (S_ISBLK(mode)) {
data->arg.ftype = NF4BLK;
data->arg.u.device.specdata1 = MAJOR(rdev);
data->arg.u.device.specdata2 = MINOR(rdev);
}
else if (S_ISCHR(mode)) {
data->arg.ftype = NF4CHR;
data->arg.u.device.specdata1 = MAJOR(rdev);
data->arg.u.device.specdata2 = MINOR(rdev);
}
status = nfs4_do_create(dir, dentry, data);
nfs4_free_createdata(data);
out:
return status;
}
static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
struct iattr *sattr, dev_t rdev)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
_nfs4_proc_mknod(dir, dentry, sattr, rdev),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsstat *fsstat)
{
struct nfs4_statfs_arg args = {
.fh = fhandle,
.bitmask = server->attr_bitmask,
};
struct nfs4_statfs_res res = {
.fsstat = fsstat,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs_fattr_init(fsstat->fattr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return nfs4_call_sync(server, &msg, &args, &res, 0);
}
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_proc_statfs(server, fhandle, fsstat),
&exception);
} while (exception.retry);
return err;
}
static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *fsinfo)
{
struct nfs4_fsinfo_arg args = {
.fh = fhandle,
.bitmask = server->attr_bitmask,
};
struct nfs4_fsinfo_res res = {
.fsinfo = fsinfo,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
.rpc_argp = &args,
.rpc_resp = &res,
};
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return nfs4_call_sync(server, &msg, &args, &res, 0);
}
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_do_fsinfo(server, fhandle, fsinfo),
&exception);
} while (exception.retry);
return err;
}
static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
{
nfs_fattr_init(fsinfo->fattr);
return nfs4_do_fsinfo(server, fhandle, fsinfo);
}
static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *pathconf)
{
struct nfs4_pathconf_arg args = {
.fh = fhandle,
.bitmask = server->attr_bitmask,
};
struct nfs4_pathconf_res res = {
.pathconf = pathconf,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
.rpc_argp = &args,
.rpc_resp = &res,
};
/* None of the pathconf attributes are mandatory to implement */
if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
memset(pathconf, 0, sizeof(*pathconf));
return 0;
}
nfs_fattr_init(pathconf->fattr);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
return nfs4_call_sync(server, &msg, &args, &res, 0);
}
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_pathconf *pathconf)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(server,
_nfs4_proc_pathconf(server, fhandle, pathconf),
&exception);
} while (exception.retry);
return err;
}
static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
struct nfs_server *server = NFS_SERVER(data->inode);
dprintk("--> %s\n", __func__);
nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
nfs_restart_rpc(task, server->nfs_client);
return -EAGAIN;
}
nfs_invalidate_atime(data->inode);
if (task->tk_status > 0)
renew_lease(server, data->timestamp);
return 0;
}
static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
data->timestamp = jiffies;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
}
static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->inode;
nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
return -EAGAIN;
}
if (task->tk_status >= 0) {
renew_lease(NFS_SERVER(inode), data->timestamp);
nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
}
return 0;
}
static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
struct nfs_server *server = NFS_SERVER(data->inode);
data->args.bitmask = server->cache_consistency_bitmask;
data->res.server = server;
data->timestamp = jiffies;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
}
static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->inode;
nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
return -EAGAIN;
}
nfs_refresh_inode(inode, data->res.fattr);
return 0;
}
static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
struct nfs_server *server = NFS_SERVER(data->inode);
data->args.bitmask = server->cache_consistency_bitmask;
data->res.server = server;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
}
/*
* nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
* standalone procedure for queueing an asynchronous RENEW.
*/
static void nfs4_renew_done(struct rpc_task *task, void *data)
{
struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
unsigned long timestamp = (unsigned long)data;
if (task->tk_status < 0) {
/* Unless we're shutting down, schedule state recovery! */
if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
nfs4_schedule_state_recovery(clp);
return;
}
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal,timestamp))
clp->cl_last_renewal = timestamp;
spin_unlock(&clp->cl_lock);
}
static const struct rpc_call_ops nfs4_renew_ops = {
.rpc_call_done = nfs4_renew_done,
};
int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
.rpc_argp = clp,
.rpc_cred = cred,
};
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
&nfs4_renew_ops, (void *)jiffies);
}
int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
.rpc_argp = clp,
.rpc_cred = cred,
};
unsigned long now = jiffies;
int status;
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
if (status < 0)
return status;
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal,now))
clp->cl_last_renewal = now;
spin_unlock(&clp->cl_lock);
return 0;
}
static inline int nfs4_server_supports_acls(struct nfs_server *server)
{
return (server->caps & NFS_CAP_ACLS)
&& (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
&& (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
}
/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
* it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
* the stack.
*/
#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
static void buf_to_pages(const void *buf, size_t buflen,
struct page **pages, unsigned int *pgbase)
{
const void *p = buf;
*pgbase = offset_in_page(buf);
p -= *pgbase;
while (p < buf + buflen) {
*(pages++) = virt_to_page(p);
p += PAGE_CACHE_SIZE;
}
}
struct nfs4_cached_acl {
int cached;
size_t len;
char data[0];
};
static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
{
struct nfs_inode *nfsi = NFS_I(inode);
spin_lock(&inode->i_lock);
kfree(nfsi->nfs4_acl);
nfsi->nfs4_acl = acl;
spin_unlock(&inode->i_lock);
}
static void nfs4_zap_acl_attr(struct inode *inode)
{
nfs4_set_cached_acl(inode, NULL);
}
static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs4_cached_acl *acl;
int ret = -ENOENT;
spin_lock(&inode->i_lock);
acl = nfsi->nfs4_acl;
if (acl == NULL)
goto out;
if (buf == NULL) /* user is just asking for length */
goto out_len;
if (acl->cached == 0)
goto out;
ret = -ERANGE; /* see getxattr(2) man page */
if (acl->len > buflen)
goto out;
memcpy(buf, acl->data, acl->len);
out_len:
ret = acl->len;
out:
spin_unlock(&inode->i_lock);
return ret;
}
static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
{
struct nfs4_cached_acl *acl;
if (buf && acl_len <= PAGE_SIZE) {
acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
if (acl == NULL)
goto out;
acl->cached = 1;
memcpy(acl->data, buf, acl_len);
} else {
acl = kmalloc(sizeof(*acl), GFP_KERNEL);
if (acl == NULL)
goto out;
acl->cached = 0;
}
acl->len = acl_len;
out:
nfs4_set_cached_acl(inode, acl);
}
static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
{
struct page *pages[NFS4ACL_MAXPAGES];
struct nfs_getaclargs args = {
.fh = NFS_FH(inode),
.acl_pages = pages,
.acl_len = buflen,
};
struct nfs_getaclres res = {
.acl_len = buflen,
};
void *resp_buf;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
.rpc_argp = &args,
.rpc_resp = &res,
};
struct page *localpage = NULL;
int ret;
if (buflen < PAGE_SIZE) {
/* As long as we're doing a round trip to the server anyway,
* let's be prepared for a page of acl data. */
localpage = alloc_page(GFP_KERNEL);
resp_buf = page_address(localpage);
if (localpage == NULL)
return -ENOMEM;
args.acl_pages[0] = localpage;
args.acl_pgbase = 0;
args.acl_len = PAGE_SIZE;
} else {
resp_buf = buf;
buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
}
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
if (ret)
goto out_free;
if (res.acl_len > args.acl_len)
nfs4_write_cached_acl(inode, NULL, res.acl_len);
else
nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
if (buf) {
ret = -ERANGE;
if (res.acl_len > buflen)
goto out_free;
if (localpage)
memcpy(buf, resp_buf, res.acl_len);
}
ret = res.acl_len;
out_free:
if (localpage)
__free_page(localpage);
return ret;
}
static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
{
struct nfs4_exception exception = { };
ssize_t ret;
do {
ret = __nfs4_get_acl_uncached(inode, buf, buflen);
if (ret >= 0)
break;
ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
} while (exception.retry);
return ret;
}
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
int ret;
if (!nfs4_server_supports_acls(server))
return -EOPNOTSUPP;
ret = nfs_revalidate_inode(server, inode);
if (ret < 0)
return ret;
ret = nfs4_read_cached_acl(inode, buf, buflen);
if (ret != -ENOENT)
return ret;
return nfs4_get_acl_uncached(inode, buf, buflen);
}
static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
struct page *pages[NFS4ACL_MAXPAGES];
struct nfs_setaclargs arg = {
.fh = NFS_FH(inode),
.acl_pages = pages,
.acl_len = buflen,
};
struct nfs_setaclres res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int ret;
if (!nfs4_server_supports_acls(server))
return -EOPNOTSUPP;
nfs_inode_return_delegation(inode);
buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
nfs_access_zap_cache(inode);
nfs_zap_acl_cache(inode);
return ret;
}
static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(inode),
__nfs4_proc_set_acl(inode, buf, buflen),
&exception);
} while (exception.retry);
return err;
}
static int
_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
{
if (!clp || task->tk_status >= 0)
return 0;
switch(task->tk_status) {
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;
nfs4_state_mark_reclaim_nograce(clp, state);
goto do_state_recovery;
case -NFS4ERR_STALE_STATEID:
if (state == NULL)
break;
nfs4_state_mark_reclaim_reboot(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_EXPIRED:
goto do_state_recovery;
nfs41: kick start nfs41 session recovery when handling errors Remove checking for any errors that the SEQUENCE operation does not return. -NFS4ERR_STALE_CLIENTID, NFS4ERR_EXPIRED, NFS4ERR_CB_PATH_DOWN, NFS4ERR_BACK_CHAN_BUSY, NFS4ERR_OP_NOT_IN_SESSION. SEQUENCE operation error recovery is very primative, we only reset the session. Remove checking for any errors that are returned by the SEQUENCE operation, but that resetting the session won't address. NFS4ERR_RETRY_UNCACHED_REP, NFS4ERR_SEQUENCE_POS,NFS4ERR_TOO_MANY_OPS. Add error checking for missing SEQUENCE errors that a session reset will address. NFS4ERR_BAD_HIGH_SLOT, NFS4ERR_DEADSESSION, NFS4ERR_SEQ_FALSE_RETRY. A reset of the session is currently our only response to a SEQUENCE operation error. Don't reset the session on errors where a new session won't help. Don't reset the session on errors where a new session won't help. [nfs41: nfs4_async_handle_error update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: trigger the state manager for session reset] Replace session state bit with nfs_client state bit. Set the NFS4CLNT_SESSION_SETUP bit upon a session related error in the sync/async error handlers. [nfs41: _nfs4_async_handle_error fix session reset error list] Sequence operation errors that session reset could help. NFS4ERR_BADSESSION NFS4ERR_BADSLOT NFS4ERR_BAD_HIGH_SLOT NFS4ERR_DEADSESSION NFS4ERR_CONN_NOT_BOUND_TO_SESSION NFS4ERR_SEQ_FALSE_RETRY NFS4ERR_SEQ_MISORDERED Sequence operation errors that a session reset would not help NFS4ERR_BADXDR NFS4ERR_DELAY NFS4ERR_REP_TOO_BIG NFS4ERR_REP_TOO_BIG_TO_CACHE NFS4ERR_REQ_TOO_BIG NFS4ERR_RETRY_UNCACHED_REP NFS4ERR_SEQUENCE_POS NFS4ERR_TOO_MANY_OPS Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41 nfs4_handle_exception fix session reset error list] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs41_sequece_call_done code to nfs41: sequence operation] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:42 +08:00
#if defined(CONFIG_NFS_V4_1)
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_DEADSESSION:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
case -NFS4ERR_SEQ_FALSE_RETRY:
case -NFS4ERR_SEQ_MISORDERED:
dprintk("%s ERROR %d, Reset session\n", __func__,
task->tk_status);
nfs4_schedule_state_recovery(clp);
nfs41: kick start nfs41 session recovery when handling errors Remove checking for any errors that the SEQUENCE operation does not return. -NFS4ERR_STALE_CLIENTID, NFS4ERR_EXPIRED, NFS4ERR_CB_PATH_DOWN, NFS4ERR_BACK_CHAN_BUSY, NFS4ERR_OP_NOT_IN_SESSION. SEQUENCE operation error recovery is very primative, we only reset the session. Remove checking for any errors that are returned by the SEQUENCE operation, but that resetting the session won't address. NFS4ERR_RETRY_UNCACHED_REP, NFS4ERR_SEQUENCE_POS,NFS4ERR_TOO_MANY_OPS. Add error checking for missing SEQUENCE errors that a session reset will address. NFS4ERR_BAD_HIGH_SLOT, NFS4ERR_DEADSESSION, NFS4ERR_SEQ_FALSE_RETRY. A reset of the session is currently our only response to a SEQUENCE operation error. Don't reset the session on errors where a new session won't help. Don't reset the session on errors where a new session won't help. [nfs41: nfs4_async_handle_error update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: trigger the state manager for session reset] Replace session state bit with nfs_client state bit. Set the NFS4CLNT_SESSION_SETUP bit upon a session related error in the sync/async error handlers. [nfs41: _nfs4_async_handle_error fix session reset error list] Sequence operation errors that session reset could help. NFS4ERR_BADSESSION NFS4ERR_BADSLOT NFS4ERR_BAD_HIGH_SLOT NFS4ERR_DEADSESSION NFS4ERR_CONN_NOT_BOUND_TO_SESSION NFS4ERR_SEQ_FALSE_RETRY NFS4ERR_SEQ_MISORDERED Sequence operation errors that a session reset would not help NFS4ERR_BADXDR NFS4ERR_DELAY NFS4ERR_REP_TOO_BIG NFS4ERR_REP_TOO_BIG_TO_CACHE NFS4ERR_REQ_TOO_BIG NFS4ERR_RETRY_UNCACHED_REP NFS4ERR_SEQUENCE_POS NFS4ERR_TOO_MANY_OPS Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41 nfs4_handle_exception fix session reset error list] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs41_sequece_call_done code to nfs41: sequence operation] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:42 +08:00
task->tk_status = 0;
return -EAGAIN;
#endif /* CONFIG_NFS_V4_1 */
case -NFS4ERR_DELAY:
if (server)
nfs_inc_server_stats(server, NFSIOS_DELAY);
case -NFS4ERR_GRACE:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
task->tk_status = 0;
return -EAGAIN;
case -NFS4ERR_OLD_STATEID:
task->tk_status = 0;
return -EAGAIN;
}
task->tk_status = nfs4_map_errors(task->tk_status);
return 0;
do_state_recovery:
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
nfs4_schedule_state_recovery(clp);
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
task->tk_status = 0;
return -EAGAIN;
}
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
{
return _nfs4_async_handle_error(task, server, server->nfs_client, state);
}
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
{
nfs4_verifier sc_verifier;
struct nfs4_setclientid setclientid = {
.sc_verifier = &sc_verifier,
.sc_prog = program,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
.rpc_argp = &setclientid,
.rpc_resp = clp,
.rpc_cred = cred,
};
__be32 *p;
int loop = 0;
int status;
p = (__be32*)sc_verifier.data;
*p++ = htonl((u32)clp->cl_boot_time.tv_sec);
*p = htonl((u32)clp->cl_boot_time.tv_nsec);
for(;;) {
setclientid.sc_name_len = scnprintf(setclientid.sc_name,
sizeof(setclientid.sc_name), "%s/%s %s %s %u",
clp->cl_ipaddr,
rpc_peeraddr2str(clp->cl_rpcclient,
RPC_DISPLAY_ADDR),
rpc_peeraddr2str(clp->cl_rpcclient,
RPC_DISPLAY_PROTO),
clp->cl_rpcclient->cl_auth->au_ops->au_name,
clp->cl_id_uniquifier);
setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
sizeof(setclientid.sc_netid),
rpc_peeraddr2str(clp->cl_rpcclient,
RPC_DISPLAY_NETID));
setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
sizeof(setclientid.sc_uaddr), "%s.%u.%u",
clp->cl_ipaddr, port >> 8, port & 255);
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
if (status != -NFS4ERR_CLID_INUSE)
break;
if (signalled())
break;
if (loop++ & 1)
ssleep(clp->cl_lease_time + 1);
else
if (++clp->cl_id_uniquifier == 0)
break;
}
return status;
}
static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs_fsinfo fsinfo;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
.rpc_argp = clp,
.rpc_resp = &fsinfo,
.rpc_cred = cred,
};
unsigned long now;
int status;
now = jiffies;
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
if (status == 0) {
spin_lock(&clp->cl_lock);
clp->cl_lease_time = fsinfo.lease_time * HZ;
clp->cl_last_renewal = now;
spin_unlock(&clp->cl_lock);
}
return status;
}
int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
long timeout = 0;
int err;
do {
err = _nfs4_proc_setclientid_confirm(clp, cred);
switch (err) {
case 0:
return err;
case -NFS4ERR_RESOURCE:
/* The IBM lawyers misread another document! */
case -NFS4ERR_DELAY:
err = nfs4_delay(clp->cl_rpcclient, &timeout);
}
} while (err == 0);
return err;
}
struct nfs4_delegreturndata {
struct nfs4_delegreturnargs args;
struct nfs4_delegreturnres res;
struct nfs_fh fh;
nfs4_stateid stateid;
unsigned long timestamp;
struct nfs_fattr fattr;
int rpc_status;
};
static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
{
struct nfs4_delegreturndata *data = calldata;
nfs4_sequence_done(data->res.server, &data->res.seq_res,
task->tk_status);
switch (task->tk_status) {
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
case 0:
renew_lease(data->res.server, data->timestamp);
break;
default:
if (nfs4_async_handle_error(task, data->res.server, NULL) ==
-EAGAIN) {
nfs_restart_rpc(task, data->res.server->nfs_client);
return;
}
}
data->rpc_status = task->tk_status;
}
static void nfs4_delegreturn_release(void *calldata)
{
kfree(calldata);
}
#if defined(CONFIG_NFS_V4_1)
static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
{
struct nfs4_delegreturndata *d_data;
d_data = (struct nfs4_delegreturndata *)data;
if (nfs4_setup_sequence(d_data->res.server->nfs_client,
&d_data->args.seq_args,
&d_data->res.seq_res, 1, task))
return;
rpc_call_start(task);
}
#endif /* CONFIG_NFS_V4_1 */
static const struct rpc_call_ops nfs4_delegreturn_ops = {
#if defined(CONFIG_NFS_V4_1)
.rpc_call_prepare = nfs4_delegreturn_prepare,
#endif /* CONFIG_NFS_V4_1 */
.rpc_call_done = nfs4_delegreturn_done,
.rpc_release = nfs4_delegreturn_release,
};
static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
{
struct nfs4_delegreturndata *data;
struct nfs_server *server = NFS_SERVER(inode);
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
.rpc_cred = cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = server->client,
.rpc_message = &msg,
.callback_ops = &nfs4_delegreturn_ops,
.flags = RPC_TASK_ASYNC,
};
int status = 0;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
data->args.fhandle = &data->fh;
data->args.stateid = &data->stateid;
data->args.bitmask = server->attr_bitmask;
nfs_copy_fh(&data->fh, NFS_FH(inode));
memcpy(&data->stateid, stateid, sizeof(data->stateid));
data->res.fattr = &data->fattr;
data->res.server = server;
data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
nfs_fattr_init(data->res.fattr);
data->timestamp = jiffies;
data->rpc_status = 0;
task_setup_data.callback_data = data;
msg.rpc_argp = &data->args,
msg.rpc_resp = &data->res,
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
if (!issync)
goto out;
status = nfs4_wait_for_completion_rpc_task(task);
if (status != 0)
goto out;
status = data->rpc_status;
if (status != 0)
goto out;
nfs_refresh_inode(inode, &data->fattr);
out:
rpc_put_task(task);
return status;
}
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
switch (err) {
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
case 0:
return 0;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
/*
* sleep, with exponential backoff, and retry the LOCK operation.
*/
static unsigned long
nfs4_set_lock_task_retry(unsigned long timeout)
{
schedule_timeout_killable(timeout);
timeout <<= 1;
if (timeout > NFS4_LOCK_MAXTIMEOUT)
return NFS4_LOCK_MAXTIMEOUT;
return timeout;
}
static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_client *clp = server->nfs_client;
struct nfs_lockt_args arg = {
.fh = NFS_FH(inode),
.fl = request,
};
struct nfs_lockt_res res = {
.denied = request,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = state->owner->so_cred,
};
struct nfs4_lock_state *lsp;
int status;
arg.lock_owner.clientid = clp->cl_clientid;
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
lsp = request->fl_u.nfs4_fl.owner;
arg.lock_owner.id = lsp->ls_id.id;
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &arg, &res, 1);
switch (status) {
case 0:
request->fl_type = F_UNLCK;
break;
case -NFS4ERR_DENIED:
status = 0;
}
request->fl_ops->fl_release_private(request);
out:
return status;
}
static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(state->inode),
_nfs4_proc_getlk(state, cmd, request),
&exception);
} while (exception.retry);
return err;
}
static int do_vfs_lock(struct file *file, struct file_lock *fl)
{
int res = 0;
switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
case FL_POSIX:
res = posix_lock_file_wait(file, fl);
break;
case FL_FLOCK:
res = flock_lock_file_wait(file, fl);
break;
default:
BUG();
}
return res;
}
struct nfs4_unlockdata {
struct nfs_locku_args arg;
struct nfs_locku_res res;
struct nfs4_lock_state *lsp;
struct nfs_open_context *ctx;
struct file_lock fl;
const struct nfs_server *server;
unsigned long timestamp;
};
static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
struct nfs_open_context *ctx,
struct nfs4_lock_state *lsp,
struct nfs_seqid *seqid)
{
struct nfs4_unlockdata *p;
struct inode *inode = lsp->ls_state->inode;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL)
return NULL;
p->arg.fh = NFS_FH(inode);
p->arg.fl = &p->fl;
p->arg.seqid = seqid;
p->res.seqid = seqid;
p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
p->arg.stateid = &lsp->ls_stateid;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
/* Ensure we don't close file until we're done freeing locks! */
p->ctx = get_nfs_open_context(ctx);
memcpy(&p->fl, fl, sizeof(p->fl));
p->server = NFS_SERVER(inode);
return p;
}
static void nfs4_locku_release_calldata(void *data)
{
struct nfs4_unlockdata *calldata = data;
nfs_free_seqid(calldata->arg.seqid);
nfs4_put_lock_state(calldata->lsp);
put_nfs_open_context(calldata->ctx);
kfree(calldata);
}
static void nfs4_locku_done(struct rpc_task *task, void *data)
{
struct nfs4_unlockdata *calldata = data;
nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
task->tk_status);
if (RPC_ASSASSINATED(task))
return;
switch (task->tk_status) {
case 0:
memcpy(calldata->lsp->ls_stateid.data,
calldata->res.stateid.data,
sizeof(calldata->lsp->ls_stateid.data));
renew_lease(calldata->server, calldata->timestamp);
break;
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
break;
default:
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
nfs_restart_rpc(task,
calldata->server->nfs_client);
}
}
static void nfs4_locku_prepare(struct rpc_task *task, void *data)
{
struct nfs4_unlockdata *calldata = data;
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
return;
if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
/* Note: exit _without_ running nfs4_locku_done */
task->tk_action = NULL;
return;
}
calldata->timestamp = jiffies;
if (nfs4_setup_sequence(calldata->server->nfs_client,
&calldata->arg.seq_args,
&calldata->res.seq_res, 1, task))
return;
rpc_call_start(task);
}
static const struct rpc_call_ops nfs4_locku_ops = {
.rpc_call_prepare = nfs4_locku_prepare,
.rpc_call_done = nfs4_locku_done,
.rpc_release = nfs4_locku_release_calldata,
};
static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
struct nfs_open_context *ctx,
struct nfs4_lock_state *lsp,
struct nfs_seqid *seqid)
{
struct nfs4_unlockdata *data;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
.rpc_cred = ctx->cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = NFS_CLIENT(lsp->ls_state->inode),
.rpc_message = &msg,
.callback_ops = &nfs4_locku_ops,
.workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC,
};
NFSv4: Make sure unlock is really an unlock when cancelling a lock I ran into a curious issue when a lock is being canceled. The cancellation results in a lock request to the vfs layer instead of an unlock request. This is particularly insidious when the process that owns the lock is exiting. In that case, sometimes the erroneous lock is applied AFTER the process has entered zombie state, preventing the lock from ever being released. Eventually other processes block on the lock causing a slow degredation of the system. In the 2.6.16 kernel this was investigated on, the problem is compounded by the fact that the cl_sem is held while blocking on the vfs lock, which results in most processes accessing the nfs file system in question hanging. In more detail, here is how the situation occurs: first _nfs4_do_setlk(): static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) ... ret = nfs4_wait_for_completion_rpc_task(task); if (ret == 0) { ... } else data->cancelled = 1; then nfs4_lock_release(): static void nfs4_lock_release(void *calldata) ... if (data->cancelled != 0) { struct rpc_task *task; task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, data->arg.lock_seqid); The problem is the same file_lock that was passed in to _nfs4_do_setlk() gets passed to nfs4_do_unlck() from nfs4_lock_release(). So the type is still F_RDLCK or FWRLCK, not F_UNLCK. At some point, when cancelling the lock, the type needs to be changed to F_UNLCK. It seemed easiest to do that in nfs4_do_unlck(), but it could be done in nfs4_lock_release(). The concern I had with doing it there was if something still needed the original file_lock, though it turns out the original file_lock still needs to be modified by nfs4_do_unlck() because nfs4_do_unlck() uses the original file_lock to pass to the vfs layer, and a copy of the original file_lock for the RPC request. It seems like the simplest solution is to force all situations where nfs4_do_unlck() is being used to result in an unlock, so with that in mind, I made the following change: Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-07-10 06:32:29 +08:00
/* Ensure this is an unlock - when canceling a lock, the
* canceled lock is passed in, and it won't be an unlock.
*/
fl->fl_type = F_UNLCK;
data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
if (data == NULL) {
nfs_free_seqid(seqid);
return ERR_PTR(-ENOMEM);
}
msg.rpc_argp = &data->arg,
msg.rpc_resp = &data->res,
task_setup_data.callback_data = data;
return rpc_run_task(&task_setup_data);
}
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_seqid *seqid;
struct nfs4_lock_state *lsp;
struct rpc_task *task;
int status = 0;
unsigned char fl_flags = request->fl_flags;
status = nfs4_set_lock_state(state, request);
/* Unlock _before_ we do the RPC call */
request->fl_flags |= FL_EXISTS;
down_read(&nfsi->rwsem);
if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
up_read(&nfsi->rwsem);
goto out;
}
up_read(&nfsi->rwsem);
if (status != 0)
goto out;
/* Is this a delegated lock? */
if (test_bit(NFS_DELEGATED_STATE, &state->flags))
goto out;
lsp = request->fl_u.nfs4_fl.owner;
seqid = nfs_alloc_seqid(&lsp->ls_seqid);
status = -ENOMEM;
if (seqid == NULL)
goto out;
task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
status = PTR_ERR(task);
if (IS_ERR(task))
goto out;
status = nfs4_wait_for_completion_rpc_task(task);
rpc_put_task(task);
out:
request->fl_flags = fl_flags;
return status;
}
struct nfs4_lockdata {
struct nfs_lock_args arg;
struct nfs_lock_res res;
struct nfs4_lock_state *lsp;
struct nfs_open_context *ctx;
struct file_lock fl;
unsigned long timestamp;
int rpc_status;
int cancelled;
struct nfs_server *server;
};
static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
{
struct nfs4_lockdata *p;
struct inode *inode = lsp->ls_state->inode;
struct nfs_server *server = NFS_SERVER(inode);
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL)
return NULL;
p->arg.fh = NFS_FH(inode);
p->arg.fl = &p->fl;
p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
if (p->arg.open_seqid == NULL)
goto out_free;
p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
if (p->arg.lock_seqid == NULL)
goto out_free_seqid;
p->arg.lock_stateid = &lsp->ls_stateid;
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id.id;
p->res.lock_seqid = p->arg.lock_seqid;
p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
p->lsp = lsp;
p->server = server;
atomic_inc(&lsp->ls_count);
p->ctx = get_nfs_open_context(ctx);
memcpy(&p->fl, fl, sizeof(p->fl));
return p;
out_free_seqid:
nfs_free_seqid(p->arg.open_seqid);
out_free:
kfree(p);
return NULL;
}
static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
{
struct nfs4_lockdata *data = calldata;
struct nfs4_state *state = data->lsp->ls_state;
dprintk("%s: begin!\n", __func__);
if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
return;
/* Do we need to do an open_to_lock_owner? */
if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
return;
data->arg.open_stateid = &state->stateid;
data->arg.new_lock_owner = 1;
data->res.open_seqid = data->arg.open_seqid;
} else
data->arg.new_lock_owner = 0;
data->timestamp = jiffies;
if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
&data->res.seq_res, 1, task))
return;
rpc_call_start(task);
dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
}
static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs4_lock_prepare(task, calldata);
}
static void nfs4_lock_done(struct rpc_task *task, void *calldata)
{
struct nfs4_lockdata *data = calldata;
dprintk("%s: begin!\n", __func__);
nfs4_sequence_done(data->server, &data->res.seq_res,
task->tk_status);
data->rpc_status = task->tk_status;
if (RPC_ASSASSINATED(task))
goto out;
if (data->arg.new_lock_owner != 0) {
if (data->rpc_status == 0)
nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
else
goto out;
}
if (data->rpc_status == 0) {
memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
sizeof(data->lsp->ls_stateid.data));
data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
}
out:
dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
}
static void nfs4_lock_release(void *calldata)
{
struct nfs4_lockdata *data = calldata;
dprintk("%s: begin!\n", __func__);
nfs_free_seqid(data->arg.open_seqid);
if (data->cancelled != 0) {
struct rpc_task *task;
task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
data->arg.lock_seqid);
if (!IS_ERR(task))
rpc_put_task(task);
dprintk("%s: cancelling lock!\n", __func__);
} else
nfs_free_seqid(data->arg.lock_seqid);
nfs4_put_lock_state(data->lsp);
put_nfs_open_context(data->ctx);
kfree(data);
dprintk("%s: done!\n", __func__);
}
static const struct rpc_call_ops nfs4_lock_ops = {
.rpc_call_prepare = nfs4_lock_prepare,
.rpc_call_done = nfs4_lock_done,
.rpc_release = nfs4_lock_release,
};
static const struct rpc_call_ops nfs4_recover_lock_ops = {
.rpc_call_prepare = nfs4_recover_lock_prepare,
.rpc_call_done = nfs4_lock_done,
.rpc_release = nfs4_lock_release,
};
static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_state *state = lsp->ls_state;
switch (error) {
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_EXPIRED:
if (new_lock_owner != 0 ||
(lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
nfs4_state_mark_reclaim_nograce(clp, state);
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
break;
case -NFS4ERR_STALE_STATEID:
if (new_lock_owner != 0 ||
(lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
nfs4_state_mark_reclaim_reboot(clp, state);
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
};
}
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
{
struct nfs4_lockdata *data;
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
.rpc_cred = state->owner->so_cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = NFS_CLIENT(state->inode),
.rpc_message = &msg,
.callback_ops = &nfs4_lock_ops,
.workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC,
};
int ret;
dprintk("%s: begin!\n", __func__);
data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
fl->fl_u.nfs4_fl.owner);
if (data == NULL)
return -ENOMEM;
if (IS_SETLKW(cmd))
data->arg.block = 1;
if (recovery_type > NFS_LOCK_NEW) {
if (recovery_type == NFS_LOCK_RECLAIM)
data->arg.reclaim = NFS_LOCK_RECLAIM;
task_setup_data.callback_ops = &nfs4_recover_lock_ops;
}
msg.rpc_argp = &data->arg,
msg.rpc_resp = &data->res,
task_setup_data.callback_data = data;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
ret = nfs4_wait_for_completion_rpc_task(task);
if (ret == 0) {
ret = data->rpc_status;
if (ret)
nfs4_handle_setlk_error(data->server, data->lsp,
data->arg.new_lock_owner, ret);
} else
data->cancelled = 1;
rpc_put_task(task);
dprintk("%s: done, ret = %d!\n", __func__, ret);
return ret;
}
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
do {
/* Cache the lock if possible... */
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
err = nfs4_set_lock_state(state, request);
if (err != 0)
return err;
do {
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
switch (err) {
default:
goto out;
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
nfs4_handle_exception(server, err, &exception);
err = 0;
}
} while (exception.retry);
out:
return err;
}
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
unsigned char fl_flags = request->fl_flags;
int status = -ENOLCK;
if ((fl_flags & FL_POSIX) &&
!test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
goto out;
/* Is this a delegated open? */
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
request->fl_flags |= FL_ACCESS;
status = do_vfs_lock(request->fl_file, request);
if (status < 0)
goto out;
down_read(&nfsi->rwsem);
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
/* Yes: cache locks! */
/* ...but avoid races with delegation recall... */
request->fl_flags = fl_flags & ~FL_SLEEP;
status = do_vfs_lock(request->fl_file, request);
goto out_unlock;
}
status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
if (status != 0)
goto out_unlock;
/* Note: we always want to sleep here! */
request->fl_flags = fl_flags | FL_SLEEP;
if (do_vfs_lock(request->fl_file, request) < 0)
printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
out_unlock:
up_read(&nfsi->rwsem);
out:
request->fl_flags = fl_flags;
return status;
}
static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_proc_setlk(state, cmd, request);
if (err == -NFS4ERR_DENIED)
err = -EAGAIN;
err = nfs4_handle_exception(NFS_SERVER(state->inode),
err, &exception);
} while (exception.retry);
return err;
}
static int
nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
{
struct nfs_open_context *ctx;
struct nfs4_state *state;
unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
int status;
/* verify open state */
ctx = nfs_file_open_context(filp);
state = ctx->state;
if (request->fl_start < 0 || request->fl_end < 0)
return -EINVAL;
if (IS_GETLK(cmd)) {
if (state != NULL)
return nfs4_proc_getlk(state, F_GETLK, request);
return 0;
}
if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
return -EINVAL;
if (request->fl_type == F_UNLCK) {
if (state != NULL)
return nfs4_proc_unlck(state, cmd, request);
return 0;
}
if (state == NULL)
return -ENOLCK;
do {
status = nfs4_proc_setlk(state, cmd, request);
if ((status != -EAGAIN) || IS_SETLK(cmd))
break;
timeout = nfs4_set_lock_task_retry(timeout);
status = -ERESTARTSYS;
if (signalled())
break;
} while(status < 0);
return status;
}
int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
err = nfs4_set_lock_state(state, fl);
if (err != 0)
goto out;
do {
err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
switch (err) {
default:
printk(KERN_ERR "%s: unhandled error %d.\n",
__func__, err);
case 0:
case -ESTALE:
goto out;
case -NFS4ERR_EXPIRED:
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
case -NFS4ERR_DEADSESSION:
nfs4_schedule_state_recovery(server->nfs_client);
goto out;
case -ERESTARTSYS:
/*
* The show must go on: exit, but mark the
* stateid as needing recovery.
*/
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OPENMODE:
nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
err = 0;
goto out;
case -ENOMEM:
case -NFS4ERR_DENIED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
err = 0;
goto out;
case -NFS4ERR_DELAY:
break;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
out:
return err;
}
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
size_t buflen, int flags)
{
struct inode *inode = dentry->d_inode;
if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
return -EOPNOTSUPP;
return nfs4_proc_set_acl(inode, buf, buflen);
}
/* The getxattr man page suggests returning -ENODATA for unknown attributes,
* and that's what we'll do for e.g. user attributes that haven't been set.
* But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
* attributes in kernel-managed attribute namespaces. */
ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
size_t buflen)
{
struct inode *inode = dentry->d_inode;
if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
return -EOPNOTSUPP;
return nfs4_proc_get_acl(inode, buf, buflen);
}
ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
{
size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
return 0;
if (buf && buflen < len)
return -ERANGE;
if (buf)
memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
return len;
}
static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
{
if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
(fattr->valid & NFS_ATTR_FATTR_FSID) &&
(fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
return;
fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
NFS_ATTR_FATTR_NLINK;
fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
fattr->nlink = 2;
}
int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
struct nfs4_fs_locations *fs_locations, struct page *page)
{
struct nfs_server *server = NFS_SERVER(dir);
u32 bitmask[2] = {
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
[1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
};
struct nfs4_fs_locations_arg args = {
.dir_fh = NFS_FH(dir),
.name = name,
.page = page,
.bitmask = bitmask,
};
struct nfs4_fs_locations_res res = {
.fs_locations = fs_locations,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
.rpc_argp = &args,
.rpc_resp = &res,
};
int status;
dprintk("%s: start\n", __func__);
nfs_fattr_init(&fs_locations->fattr);
fs_locations->server = server;
fs_locations->nlocations = 0;
nfs41: introduce nfs4_call_sync Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:03 +08:00
status = nfs4_call_sync(server, &msg, &args, &res, 0);
nfs_fixup_referral_attributes(&fs_locations->fattr);
dprintk("%s: returned status = %d\n", __func__, status);
return status;
}
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
#ifdef CONFIG_NFS_V4_1
/*
* nfs4_proc_exchange_id()
*
* Since the clientid has expired, all compounds using sessions
* associated with the stale clientid will be returning
* NFS4ERR_BADSESSION in the sequence operation, and will therefore
* be in some phase of session reset.
*/
int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
{
nfs4_verifier verifier;
struct nfs41_exchange_id_args args = {
.client = clp,
.flags = clp->cl_exchange_flags,
};
struct nfs41_exchange_id_res res = {
.client = clp,
};
int status;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_cred = cred,
};
__be32 *p;
dprintk("--> %s\n", __func__);
BUG_ON(clp == NULL);
/* Remove server-only flags */
args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
p = (u32 *)verifier.data;
*p++ = htonl((u32)clp->cl_boot_time.tv_sec);
*p = htonl((u32)clp->cl_boot_time.tv_nsec);
args.verifier = &verifier;
while (1) {
args.id_len = scnprintf(args.id, sizeof(args.id),
"%s/%s %u",
clp->cl_ipaddr,
rpc_peeraddr2str(clp->cl_rpcclient,
RPC_DISPLAY_ADDR),
clp->cl_id_uniquifier);
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
if (status != NFS4ERR_CLID_INUSE)
break;
if (signalled())
break;
if (++clp->cl_id_uniquifier == 0)
break;
}
dprintk("<-- %s status= %d\n", __func__, status);
return status;
}
struct nfs4_get_lease_time_data {
struct nfs4_get_lease_time_args *args;
struct nfs4_get_lease_time_res *res;
struct nfs_client *clp;
};
static void nfs4_get_lease_time_prepare(struct rpc_task *task,
void *calldata)
{
int ret;
struct nfs4_get_lease_time_data *data =
(struct nfs4_get_lease_time_data *)calldata;
dprintk("--> %s\n", __func__);
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
/* just setup sequence, do not trigger session recovery
since we're invoked within one */
ret = nfs41_setup_sequence(data->clp->cl_session,
&data->args->la_seq_args,
&data->res->lr_seq_res, 0, task);
BUG_ON(ret == -EAGAIN);
rpc_call_start(task);
dprintk("<-- %s\n", __func__);
}
/*
* Called from nfs4_state_manager thread for session setup, so don't recover
* from sequence operation or clientid errors.
*/
static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
{
struct nfs4_get_lease_time_data *data =
(struct nfs4_get_lease_time_data *)calldata;
dprintk("--> %s\n", __func__);
nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
switch (task->tk_status) {
case -NFS4ERR_DELAY:
case -NFS4ERR_GRACE:
dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
rpc_delay(task, NFS4_POLL_RETRY_MIN);
task->tk_status = 0;
nfs_restart_rpc(task, data->clp);
return;
}
dprintk("<-- %s\n", __func__);
}
struct rpc_call_ops nfs4_get_lease_time_ops = {
.rpc_call_prepare = nfs4_get_lease_time_prepare,
.rpc_call_done = nfs4_get_lease_time_done,
};
int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
{
struct rpc_task *task;
struct nfs4_get_lease_time_args args;
struct nfs4_get_lease_time_res res = {
.lr_fsinfo = fsinfo,
};
struct nfs4_get_lease_time_data data = {
.args = &args,
.res = &res,
.clp = clp,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
.rpc_argp = &args,
.rpc_resp = &res,
};
struct rpc_task_setup task_setup = {
.rpc_client = clp->cl_rpcclient,
.rpc_message = &msg,
.callback_ops = &nfs4_get_lease_time_ops,
.callback_data = &data
};
int status;
res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
dprintk("--> %s\n", __func__);
task = rpc_run_task(&task_setup);
if (IS_ERR(task))
status = PTR_ERR(task);
else {
status = task->tk_status;
rpc_put_task(task);
}
dprintk("<-- %s return %d\n", __func__, status);
return status;
}
/*
* Reset a slot table
*/
static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
int old_max_slots, int ivalue)
{
int i;
int ret = 0;
dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
/*
* Until we have dynamic slot table adjustment, insist
* upon the same slot table size
*/
if (max_slots != old_max_slots) {
dprintk("%s reset slot table does't match old\n",
__func__);
ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
goto out;
}
spin_lock(&tbl->slot_tbl_lock);
for (i = 0; i < max_slots; ++i)
tbl->slots[i].seq_nr = ivalue;
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
tbl, tbl->slots, tbl->max_slots);
out:
dprintk("<-- %s: return %d\n", __func__, ret);
return ret;
}
/*
* Reset the forechannel and backchannel slot tables
*/
static int nfs4_reset_slot_tables(struct nfs4_session *session)
{
int status;
status = nfs4_reset_slot_table(&session->fc_slot_table,
session->fc_attrs.max_reqs,
session->fc_slot_table.max_slots,
1);
if (status)
return status;
status = nfs4_reset_slot_table(&session->bc_slot_table,
session->bc_attrs.max_reqs,
session->bc_slot_table.max_slots,
0);
return status;
}
/* Destroy the slot table */
static void nfs4_destroy_slot_tables(struct nfs4_session *session)
{
if (session->fc_slot_table.slots != NULL) {
kfree(session->fc_slot_table.slots);
session->fc_slot_table.slots = NULL;
}
if (session->bc_slot_table.slots != NULL) {
kfree(session->bc_slot_table.slots);
session->bc_slot_table.slots = NULL;
}
return;
}
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
/*
* Initialize slot table
*/
static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
int max_slots, int ivalue)
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
{
struct nfs4_slot *slot;
int ret = -ENOMEM;
BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
if (!slot)
goto out;
ret = 0;
spin_lock(&tbl->slot_tbl_lock);
tbl->max_slots = max_slots;
tbl->slots = slot;
tbl->highest_used_slotid = -1; /* no slot is currently used */
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
tbl, tbl->slots, tbl->max_slots);
out:
dprintk("<-- %s: return %d\n", __func__, ret);
return ret;
}
/*
* Initialize the forechannel and backchannel tables
*/
static int nfs4_init_slot_tables(struct nfs4_session *session)
{
struct nfs4_slot_table *tbl;
int status = 0;
tbl = &session->fc_slot_table;
if (tbl->slots == NULL) {
status = nfs4_init_slot_table(tbl,
session->fc_attrs.max_reqs, 1);
if (status)
return status;
}
tbl = &session->bc_slot_table;
if (tbl->slots == NULL) {
status = nfs4_init_slot_table(tbl,
session->bc_attrs.max_reqs, 0);
if (status)
nfs4_destroy_slot_tables(session);
}
return status;
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
}
struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
{
struct nfs4_session *session;
struct nfs4_slot_table *tbl;
session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
if (!session)
return NULL;
nfs41: add session setup to the state manager At mount, nfs_alloc_client sets the cl_state NFS4CLNT_LEASE_EXPIRED bit and nfs4_alloc_session sets the NFS4CLNT_SESSION_SETUP bit, so both bits are set when nfs4_lookup_root calls nfs4_recover_expired_lease which schedules the nfs4_state_manager and waits for it to complete. Place the session setup after the clientid establishment in nfs4_state_manager so that the session is setup right after the clientid has been established without rescheduling the state manager. Unlike nfsv4.0, the nfs_client struct is not ready to use until the session has been established. Postpone marking the nfs_client struct to NFS_CS_READY until after a successful CREATE_SESSION call so that other threads cannot use the client until the session is established. If the EXCHANGE_ID call fails and the session has not been setup (the NFS4CLNT_SESSION_SETUP bit is set), mark the client with the error and return. If the session setup CREATE_SESSION call fails with NFS4ERR_STALE_CLIENTID which could occur due to server reboot or network partition inbetween the EXCHANGE_ID and CREATE_SESSION call, reset the NFS4CLNT_LEASE_EXPIRED and NFS4CLNT_SESSION_SETUP bits and try again. If the CREATE_SESSION call fails with other errors, mark the client with the error and return. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: NFS_CS_SESSION_SETUP cl_cons_state for back channel setup] On session setup, the CREATE_SESSION reply races with the server back channel probe which needs to succeed to setup the back channel. Set a new cl_cons_state NFS_CS_SESSION_SETUP just prior to the CREATE_SESSION call and add it as a valid state to nfs_find_client so that the client back channel can find the nfs_client struct and won't drop the server backchannel probe. Use a new cl_cons_state so that NFSv4.0 back channel behaviour which only sets NFS_CS_READY is unchanged. Adjust waiting on the nfs_client_active_wq accordingly. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rename NFS_CS_SESSION_SETUP to NFS_CS_SESSION_INITING] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: set NFS_CL_SESSION_INITING in alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: move session setup into a function] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_proc_create_session declaration here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:38 +08:00
/*
* The create session reply races with the server back
* channel probe. Mark the client NFS_CS_SESSION_INITING
* so that the client back channel can find the
* nfs_client struct
*/
clp->cl_cons_state = NFS_CS_SESSION_INITING;
init_completion(&session->complete);
nfs41: add session setup to the state manager At mount, nfs_alloc_client sets the cl_state NFS4CLNT_LEASE_EXPIRED bit and nfs4_alloc_session sets the NFS4CLNT_SESSION_SETUP bit, so both bits are set when nfs4_lookup_root calls nfs4_recover_expired_lease which schedules the nfs4_state_manager and waits for it to complete. Place the session setup after the clientid establishment in nfs4_state_manager so that the session is setup right after the clientid has been established without rescheduling the state manager. Unlike nfsv4.0, the nfs_client struct is not ready to use until the session has been established. Postpone marking the nfs_client struct to NFS_CS_READY until after a successful CREATE_SESSION call so that other threads cannot use the client until the session is established. If the EXCHANGE_ID call fails and the session has not been setup (the NFS4CLNT_SESSION_SETUP bit is set), mark the client with the error and return. If the session setup CREATE_SESSION call fails with NFS4ERR_STALE_CLIENTID which could occur due to server reboot or network partition inbetween the EXCHANGE_ID and CREATE_SESSION call, reset the NFS4CLNT_LEASE_EXPIRED and NFS4CLNT_SESSION_SETUP bits and try again. If the CREATE_SESSION call fails with other errors, mark the client with the error and return. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: NFS_CS_SESSION_SETUP cl_cons_state for back channel setup] On session setup, the CREATE_SESSION reply races with the server back channel probe which needs to succeed to setup the back channel. Set a new cl_cons_state NFS_CS_SESSION_SETUP just prior to the CREATE_SESSION call and add it as a valid state to nfs_find_client so that the client back channel can find the nfs_client struct and won't drop the server backchannel probe. Use a new cl_cons_state so that NFSv4.0 back channel behaviour which only sets NFS_CS_READY is unchanged. Adjust waiting on the nfs_client_active_wq accordingly. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rename NFS_CS_SESSION_SETUP to NFS_CS_SESSION_INITING] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: set NFS_CL_SESSION_INITING in alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: move session setup into a function] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_proc_create_session declaration here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:38 +08:00
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
tbl = &session->fc_slot_table;
tbl->highest_used_slotid = -1;
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
tbl = &session->bc_slot_table;
tbl->highest_used_slotid = -1;
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
session->clp = clp;
return session;
}
void nfs4_destroy_session(struct nfs4_session *session)
{
nfs4_proc_destroy_session(session);
dprintk("%s Destroy backchannel for xprt %p\n",
__func__, session->clp->cl_rpcclient->cl_xprt);
xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
NFS41_BC_MIN_CALLBACKS);
nfs4_destroy_slot_tables(session);
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
kfree(session);
}
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
/*
* Initialize the values to be used by the client in CREATE_SESSION
* If nfs4_init_session set the fore channel request and response sizes,
* use them.
*
* Set the back channel max_resp_sz_cached to zero to force the client to
* always set csa_cachethis to FALSE because the current implementation
* of the back channel DRC only supports caching the CB_SEQUENCE operation.
*/
static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
{
struct nfs4_session *session = args->client->cl_session;
unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
mxresp_sz = session->fc_attrs.max_resp_sz;
if (mxrqst_sz == 0)
mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
if (mxresp_sz == 0)
mxresp_sz = NFS_MAX_FILE_IO_SIZE;
/* Fore channel attributes */
args->fc_attrs.headerpadsz = 0;
args->fc_attrs.max_rqst_sz = mxrqst_sz;
args->fc_attrs.max_resp_sz = mxresp_sz;
args->fc_attrs.max_resp_sz_cached = mxresp_sz;
args->fc_attrs.max_ops = NFS4_MAX_OPS;
args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
__func__,
args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
args->fc_attrs.max_reqs);
/* Back channel attributes */
args->bc_attrs.headerpadsz = 0;
args->bc_attrs.max_rqst_sz = PAGE_SIZE;
args->bc_attrs.max_resp_sz = PAGE_SIZE;
args->bc_attrs.max_resp_sz_cached = 0;
args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
args->bc_attrs.max_reqs = 1;
dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
__func__,
args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
args->bc_attrs.max_reqs);
}
static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
{
if (rcvd <= sent)
return 0;
printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
"sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
return -EINVAL;
}
#define _verify_fore_channel_attr(_name_) \
_verify_channel_attr("fore", #_name_, \
args->fc_attrs._name_, \
session->fc_attrs._name_)
#define _verify_back_channel_attr(_name_) \
_verify_channel_attr("back", #_name_, \
args->bc_attrs._name_, \
session->bc_attrs._name_)
/*
* The server is not allowed to increase the fore channel header pad size,
* maximum response size, or maximum number of operations.
*
* The back channel attributes are only negotiatied down: We send what the
* (back channel) server insists upon.
*/
static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
struct nfs4_session *session)
{
int ret = 0;
ret |= _verify_fore_channel_attr(headerpadsz);
ret |= _verify_fore_channel_attr(max_resp_sz);
ret |= _verify_fore_channel_attr(max_ops);
ret |= _verify_back_channel_attr(headerpadsz);
ret |= _verify_back_channel_attr(max_rqst_sz);
ret |= _verify_back_channel_attr(max_resp_sz);
ret |= _verify_back_channel_attr(max_resp_sz_cached);
ret |= _verify_back_channel_attr(max_ops);
ret |= _verify_back_channel_attr(max_reqs);
return ret;
}
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
static int _nfs4_proc_create_session(struct nfs_client *clp)
{
struct nfs4_session *session = clp->cl_session;
struct nfs41_create_session_args args = {
.client = clp,
.cb_program = NFS4_CALLBACK,
};
struct nfs41_create_session_res res = {
.client = clp,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
.rpc_argp = &args,
.rpc_resp = &res,
};
int status;
nfs4_init_channel_attrs(&args);
args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
if (!status)
/* Verify the session's negotiated channel_attrs values */
status = nfs4_verify_channel_attrs(&args, session);
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
if (!status) {
/* Increment the clientid slot sequence id */
clp->cl_seqid++;
}
return status;
}
/*
* Issues a CREATE_SESSION operation to the server.
* It is the responsibility of the caller to verify the session is
* expired before calling this routine.
*/
int nfs4_proc_create_session(struct nfs_client *clp)
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
{
int status;
unsigned *ptr;
struct nfs4_session *session = clp->cl_session;
dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
status = _nfs4_proc_create_session(clp);
if (status)
goto out;
/* Init and reset the fore channel */
status = nfs4_init_slot_tables(session);
dprintk("slot table initialization returned %d\n", status);
if (status)
goto out;
status = nfs4_reset_slot_tables(session);
dprintk("slot table reset returned %d\n", status);
nfs41: create_session operation Implement the create_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Set the real fore channel max operations to preserve server resources. Note: If the server returns < NFS4_MAX_OPS, the client will very soon get an NFS4ERR_TOO_MANY_OPS. A later patch will handle this. Set the max_rqst_sz and max_resp_sz to PAGE_SIZE - we preallocate the buffers. Set the back channel max_resp_sz_cached to zero to force the client to always set csa_cachethis to FALSE because the current implementation of the back channel DRC only supports caching the CB_SEQUENCE operation. The client back channel server supports one slot, and desires 2 operations per compound. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Use the struct nfs_client cl_rpcclient. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_init_channel_attrs, just use nfs41_create_session_args] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use rsize and wsize for session channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set channel max operations] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: set back channel attributes] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_adjust_channel_attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: move CONFIG_NFS_V4_1 endif] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] [moved nfs4_init_slot_table definition here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use kcalloc to allocate slot table] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix Xcode_create_session's xdr Xcoding pointer type] [nfs41: refactor decoding of channel attributes] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-04-01 21:22:31 +08:00
if (status)
goto out;
ptr = (unsigned *)&session->sess_id.data[0];
dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
out:
dprintk("<-- %s\n", __func__);
return status;
}
/*
* Issue the over-the-wire RPC DESTROY_SESSION.
* The caller must serialize access to this routine.
*/
int nfs4_proc_destroy_session(struct nfs4_session *session)
{
int status = 0;
struct rpc_message msg;
dprintk("--> nfs4_proc_destroy_session\n");
/* session is still being setup */
if (session->clp->cl_cons_state != NFS_CS_READY)
return status;
msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
msg.rpc_argp = session;
msg.rpc_resp = NULL;
msg.rpc_cred = NULL;
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
if (status)
printk(KERN_WARNING
"Got error %d from the server on DESTROY_SESSION. "
"Session has been destroyed regardless...\n", status);
dprintk("<-- nfs4_proc_destroy_session\n");
return status;
}
int nfs4_init_session(struct nfs_server *server)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_session *session;
unsigned int rsize, wsize;
int ret;
if (!nfs4_has_session(clp))
return 0;
rsize = server->rsize;
if (rsize == 0)
rsize = NFS_MAX_FILE_IO_SIZE;
wsize = server->wsize;
if (wsize == 0)
wsize = NFS_MAX_FILE_IO_SIZE;
session = clp->cl_session;
session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
ret = nfs4_recover_expired_lease(server);
if (!ret)
ret = nfs4_check_client_ready(clp);
return ret;
}
nfs41: sequence operation Implement the sequence operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Check returned sessionid, slotid and slot sequenceid in decode_sequence. If the server returns different values for sessionID, slotID or slot sequence number than what was sent, the server is looney tunes. Pass the sequence operation status to nfs41_sequence_done in order to determine when to increment the slot sequence ID. Free slot is separated from sequence done. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: deref slot table in decode_sequence only for minorversion!=0] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [nfs41: return ESERVERFAULT in decode_sequence] [no sr_session, no sr_flags] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use nfs4_call_sync_sequence to renew session lease] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove nfs4_call_sync_sequence forward definition] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: use struct nfs_client for nfs41_proc_async_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41 nfs41_sequence_call_done update error checking] [nfs41 nfs41_sequence_done update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove switch on error from nfs41_sequence_call_done] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:36 +08:00
/*
* Renew the cl_session lease.
*/
static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs4_sequence_args args;
struct nfs4_sequence_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
.rpc_argp = &args,
.rpc_resp = &res,
.rpc_cred = cred,
};
args.sa_cache_this = 0;
return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
&res, args.sa_cache_this, 1);
nfs41: sequence operation Implement the sequence operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Check returned sessionid, slotid and slot sequenceid in decode_sequence. If the server returns different values for sessionID, slotID or slot sequence number than what was sent, the server is looney tunes. Pass the sequence operation status to nfs41_sequence_done in order to determine when to increment the slot sequence ID. Free slot is separated from sequence done. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: deref slot table in decode_sequence only for minorversion!=0] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [nfs41: return ESERVERFAULT in decode_sequence] [no sr_session, no sr_flags] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use nfs4_call_sync_sequence to renew session lease] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove nfs4_call_sync_sequence forward definition] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: use struct nfs_client for nfs41_proc_async_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41 nfs41_sequence_call_done update error checking] [nfs41 nfs41_sequence_done update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove switch on error from nfs41_sequence_call_done] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:36 +08:00
}
void nfs41_sequence_call_done(struct rpc_task *task, void *data)
{
struct nfs_client *clp = (struct nfs_client *)data;
nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
if (task->tk_status < 0) {
dprintk("%s ERROR %d\n", __func__, task->tk_status);
if (_nfs4_async_handle_error(task, NULL, clp, NULL)
== -EAGAIN) {
nfs_restart_rpc(task, clp);
nfs41: sequence operation Implement the sequence operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Check returned sessionid, slotid and slot sequenceid in decode_sequence. If the server returns different values for sessionID, slotID or slot sequence number than what was sent, the server is looney tunes. Pass the sequence operation status to nfs41_sequence_done in order to determine when to increment the slot sequence ID. Free slot is separated from sequence done. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: deref slot table in decode_sequence only for minorversion!=0] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [nfs41: return ESERVERFAULT in decode_sequence] [no sr_session, no sr_flags] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use nfs4_call_sync_sequence to renew session lease] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove nfs4_call_sync_sequence forward definition] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: use struct nfs_client for nfs41_proc_async_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41 nfs41_sequence_call_done update error checking] [nfs41 nfs41_sequence_done update error checking] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove switch on error from nfs41_sequence_call_done] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:22:36 +08:00
return;
}
}
dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
kfree(task->tk_msg.rpc_argp);
kfree(task->tk_msg.rpc_resp);
dprintk("<-- %s\n", __func__);
}
static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
{
struct nfs_client *clp;
struct nfs4_sequence_args *args;
struct nfs4_sequence_res *res;
clp = (struct nfs_client *)data;
args = task->tk_msg.rpc_argp;
res = task->tk_msg.rpc_resp;
if (nfs4_setup_sequence(clp, args, res, 0, task))
return;
rpc_call_start(task);
}
static const struct rpc_call_ops nfs41_sequence_ops = {
.rpc_call_done = nfs41_sequence_call_done,
.rpc_call_prepare = nfs41_sequence_prepare,
};
static int nfs41_proc_async_sequence(struct nfs_client *clp,
struct rpc_cred *cred)
{
struct nfs4_sequence_args *args;
struct nfs4_sequence_res *res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
.rpc_cred = cred,
};
args = kzalloc(sizeof(*args), GFP_KERNEL);
if (!args)
return -ENOMEM;
res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res) {
kfree(args);
return -ENOMEM;
}
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
msg.rpc_argp = args;
msg.rpc_resp = res;
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
&nfs41_sequence_ops, (void *)clp);
}
struct nfs4_reclaim_complete_data {
struct nfs_client *clp;
struct nfs41_reclaim_complete_args arg;
struct nfs41_reclaim_complete_res res;
};
static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
&calldata->res.seq_res, 0, task))
return;
rpc_call_start(task);
}
static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
struct nfs_client *clp = calldata->clp;
struct nfs4_sequence_res *res = &calldata->res.seq_res;
dprintk("--> %s\n", __func__);
nfs41_sequence_done(clp, res, task->tk_status);
switch (task->tk_status) {
case 0:
case -NFS4ERR_COMPLETE_ALREADY:
break;
case -NFS4ERR_BADSESSION:
case -NFS4ERR_DEADSESSION:
/*
* Handle the session error, but do not retry the operation, as
* we have no way of telling whether the clientid had to be
* reset before we got our reply. If reset, a new wave of
* reclaim operations will follow, containing their own reclaim
* complete. We don't want our retry to get on the way of
* recovery by incorrectly indicating to the server that we're
* done reclaiming state since the process had to be restarted.
*/
_nfs4_async_handle_error(task, NULL, clp, NULL);
break;
default:
if (_nfs4_async_handle_error(
task, NULL, clp, NULL) == -EAGAIN) {
rpc_restart_call_prepare(task);
return;
}
}
dprintk("<-- %s\n", __func__);
}
static void nfs4_free_reclaim_complete_data(void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
kfree(calldata);
}
static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
.rpc_call_prepare = nfs4_reclaim_complete_prepare,
.rpc_call_done = nfs4_reclaim_complete_done,
.rpc_release = nfs4_free_reclaim_complete_data,
};
/*
* Issue a global reclaim complete.
*/
static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
{
struct nfs4_reclaim_complete_data *calldata;
struct rpc_task *task;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
};
struct rpc_task_setup task_setup_data = {
.rpc_client = clp->cl_rpcclient,
.rpc_message = &msg,
.callback_ops = &nfs4_reclaim_complete_call_ops,
.flags = RPC_TASK_ASYNC,
};
int status = -ENOMEM;
dprintk("--> %s\n", __func__);
calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
if (calldata == NULL)
goto out;
calldata->clp = clp;
calldata->arg.one_fs = 0;
calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
msg.rpc_argp = &calldata->arg;
msg.rpc_resp = &calldata->res;
task_setup_data.callback_data = calldata;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
status = PTR_ERR(task);
rpc_put_task(task);
out:
dprintk("<-- %s status=%d\n", __func__, status);
return status;
}
nfs41: sessions client infrastructure NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-04-01 21:21:53 +08:00
#endif /* CONFIG_NFS_V4_1 */
struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
.recover_open = nfs4_open_reclaim,
.recover_lock = nfs4_lock_reclaim,
.establish_clid = nfs4_init_clientid,
.get_clid_cred = nfs4_get_setclientid_cred,
};
#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
.recover_open = nfs4_open_reclaim,
.recover_lock = nfs4_lock_reclaim,
.establish_clid = nfs41_init_clientid,
.get_clid_cred = nfs4_get_exchange_id_cred,
.reclaim_complete = nfs41_proc_reclaim_complete,
};
#endif /* CONFIG_NFS_V4_1 */
struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
.recover_open = nfs4_open_expired,
.recover_lock = nfs4_lock_expired,
.establish_clid = nfs4_init_clientid,
.get_clid_cred = nfs4_get_setclientid_cred,
};
#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
.recover_open = nfs4_open_expired,
.recover_lock = nfs4_lock_expired,
.establish_clid = nfs41_init_clientid,
.get_clid_cred = nfs4_get_exchange_id_cred,
};
#endif /* CONFIG_NFS_V4_1 */
struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
.sched_state_renewal = nfs4_proc_async_renew,
.get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
.renew_lease = nfs4_proc_renew,
};
#if defined(CONFIG_NFS_V4_1)
struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
.sched_state_renewal = nfs41_proc_async_sequence,
.get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
.renew_lease = nfs4_proc_sequence,
};
#endif
/*
* Per minor version reboot and network partition recovery ops
*/
struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
&nfs40_reboot_recovery_ops,
#if defined(CONFIG_NFS_V4_1)
&nfs41_reboot_recovery_ops,
#endif
};
struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
&nfs40_nograce_recovery_ops,
#if defined(CONFIG_NFS_V4_1)
&nfs41_nograce_recovery_ops,
#endif
};
struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
&nfs40_state_renewal_ops,
#if defined(CONFIG_NFS_V4_1)
&nfs41_state_renewal_ops,
#endif
};
static const struct inode_operations nfs4_file_inode_operations = {
.permission = nfs_permission,
.getattr = nfs_getattr,
.setattr = nfs_setattr,
.getxattr = nfs4_getxattr,
.setxattr = nfs4_setxattr,
.listxattr = nfs4_listxattr,
};
const struct nfs_rpc_ops nfs_v4_clientops = {
.version = 4, /* protocol version */
.dentry_ops = &nfs4_dentry_operations,
.dir_inode_ops = &nfs4_dir_inode_operations,
.file_inode_ops = &nfs4_file_inode_operations,
.getroot = nfs4_proc_get_root,
.getattr = nfs4_proc_getattr,
.setattr = nfs4_proc_setattr,
.lookupfh = nfs4_proc_lookupfh,
.lookup = nfs4_proc_lookup,
.access = nfs4_proc_access,
.readlink = nfs4_proc_readlink,
.create = nfs4_proc_create,
.remove = nfs4_proc_remove,
.unlink_setup = nfs4_proc_unlink_setup,
.unlink_done = nfs4_proc_unlink_done,
.rename = nfs4_proc_rename,
.link = nfs4_proc_link,
.symlink = nfs4_proc_symlink,
.mkdir = nfs4_proc_mkdir,
.rmdir = nfs4_proc_remove,
.readdir = nfs4_proc_readdir,
.mknod = nfs4_proc_mknod,
.statfs = nfs4_proc_statfs,
.fsinfo = nfs4_proc_fsinfo,
.pathconf = nfs4_proc_pathconf,
.set_capabilities = nfs4_server_capabilities,
.decode_dirent = nfs4_decode_dirent,
.read_setup = nfs4_proc_read_setup,
.read_done = nfs4_read_done,
.write_setup = nfs4_proc_write_setup,
.write_done = nfs4_write_done,
.commit_setup = nfs4_proc_commit_setup,
.commit_done = nfs4_commit_done,
.lock = nfs4_proc_lock,
.clear_acl_cache = nfs4_zap_acl_attr,
.close_context = nfs4_close_context,
};
/*
* Local variables:
* c-basic-offset: 8
* End:
*/