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Highlights: 

- Fix EXCHANGE_ID response when NFSD runs in a container
 - A battery of new static trace points
 - Socket transports now use bio_vec to send Replies
 - NFS/RDMA now supports filesystems with no .splice_read method
 - Favor memcpy() over DMA mapping for small RPC/RDMA Replies
 - Add pre-requisites for supporting multiple Write chunks
 - Numerous minor fixes and clean-ups
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Merge tag 'nfsd-5.7' of git://git.linux-nfs.org/projects/cel/cel-2.6

Pull nfsd updates from Chuck Lever:

 - Fix EXCHANGE_ID response when NFSD runs in a container

 - A battery of new static trace points

 - Socket transports now use bio_vec to send Replies

 - NFS/RDMA now supports filesystems with no .splice_read method

 - Favor memcpy() over DMA mapping for small RPC/RDMA Replies

 - Add pre-requisites for supporting multiple Write chunks

 - Numerous minor fixes and clean-ups

[ Chuck is filling in for Bruce this time while he and his family settle
  into a new house ]

* tag 'nfsd-5.7' of git://git.linux-nfs.org/projects/cel/cel-2.6: (39 commits)
  svcrdma: Fix leak of transport addresses
  SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()'
  SUNRPC/cache: don't allow invalid entries to be flushed
  nfsd: fsnotify on rmdir under nfsd/clients/
  nfsd4: kill warnings on testing stateids with mismatched clientids
  nfsd: remove read permission bit for ctl sysctl
  NFSD: Fix NFS server build errors
  sunrpc: Add tracing for cache events
  SUNRPC/cache: Allow garbage collection of invalid cache entries
  nfsd: export upcalls must not return ESTALE when mountd is down
  nfsd: Add tracepoints for update of the expkey and export cache entries
  nfsd: Add tracepoints for exp_find_key() and exp_get_by_name()
  nfsd: Add tracing to nfsd_set_fh_dentry()
  nfsd: Don't add locks to closed or closing open stateids
  SUNRPC: Teach server to use xprt_sock_sendmsg for socket sends
  SUNRPC: Refactor xs_sendpages()
  svcrdma: Avoid DMA mapping small RPC Replies
  svcrdma: Fix double sync of transport header buffer
  svcrdma: Refactor chunk list encoders
  SUNRPC: Add encoders for list item discriminators
  ...
This commit is contained in:
Linus Torvalds 2020-04-04 11:13:51 -07:00
parent bdabb68931 1a33d8a284
commit b3d8e42282
40 changed files with 1420 additions and 922 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/nfs/dns_resolve.c
View File

@ -152,12 +152,13 @@ static int nfs_dns_upcall(struct cache_detail *cd,
struct cache_head *ch)
{
struct nfs_dns_ent *key = container_of(ch, struct nfs_dns_ent, h);
int ret;
ret = nfs_cache_upcall(cd, key->hostname);
if (ret)
ret = sunrpc_cache_pipe_upcall(cd, ch);
return ret;
if (test_and_set_bit(CACHE_PENDING, &ch->flags))
return 0;
if (!nfs_cache_upcall(cd, key->hostname))
return 0;
clear_bit(CACHE_PENDING, &ch->flags);
return sunrpc_cache_pipe_upcall_timeout(cd, ch);
}
static int nfs_dns_match(struct cache_head *ca,

2
fs/nfsd/Kconfig
View File

@ -136,7 +136,7 @@ config NFSD_FLEXFILELAYOUT
config NFSD_V4_2_INTER_SSC
bool "NFSv4.2 inter server to server COPY"
depends on NFSD_V4 && NFS_V4_1 && NFS_V4_2
depends on NFSD_V4 && NFS_V4_1 && NFS_V4_2 && NFS_FS=y
help
This option enables support for NFSv4.2 inter server to
server copy where the destination server calls the NFSv4.2

45
fs/nfsd/export.c
View File

@ -23,6 +23,7 @@
#include "netns.h"
#include "pnfs.h"
#include "filecache.h"
#include "trace.h"
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
@ -50,6 +51,11 @@ static void expkey_put(struct kref *ref)
kfree_rcu(key, ek_rcu);
}
static int expkey_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h);
}
static void expkey_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
@ -140,7 +146,9 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
if (len == 0) {
set_bit(CACHE_NEGATIVE, &key.h.flags);
ek = svc_expkey_update(cd, &key, ek);
if (!ek)
if (ek)
trace_nfsd_expkey_update(ek, NULL);
else
err = -ENOMEM;
} else {
err = kern_path(buf, 0, &key.ek_path);
@ -150,7 +158,9 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
dprintk("Found the path %s\n", buf);
ek = svc_expkey_update(cd, &key, ek);
if (!ek)
if (ek)
trace_nfsd_expkey_update(ek, buf);
else
err = -ENOMEM;
path_put(&key.ek_path);
}
@ -249,6 +259,7 @@ static const struct cache_detail svc_expkey_cache_template = {
.hash_size = EXPKEY_HASHMAX,
.name = "nfsd.fh",
.cache_put = expkey_put,
.cache_upcall = expkey_upcall,
.cache_request = expkey_request,
.cache_parse = expkey_parse,
.cache_show = expkey_show,
@ -330,6 +341,11 @@ static void svc_export_put(struct kref *ref)
kfree_rcu(exp, ex_rcu);
}
static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h);
}
static void svc_export_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
@ -643,15 +659,17 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
}
expp = svc_export_lookup(&exp);
if (expp)
expp = svc_export_update(&exp, expp);
else
if (!expp) {
err = -ENOMEM;
cache_flush();
if (expp == NULL)
err = -ENOMEM;
else
goto out4;
}
expp = svc_export_update(&exp, expp);
if (expp) {
trace_nfsd_export_update(expp);
cache_flush();
exp_put(expp);
} else
err = -ENOMEM;
out4:
nfsd4_fslocs_free(&exp.ex_fslocs);
kfree(exp.ex_uuid);
@ -767,6 +785,7 @@ static const struct cache_detail svc_export_cache_template = {
.hash_size = EXPORT_HASHMAX,
.name = "nfsd.export",
.cache_put = svc_export_put,
.cache_upcall = svc_export_upcall,
.cache_request = svc_export_request,
.cache_parse = svc_export_parse,
.cache_show = svc_export_show,
@ -832,8 +851,10 @@ exp_find_key(struct cache_detail *cd, struct auth_domain *clp, int fsid_type,
if (ek == NULL)
return ERR_PTR(-ENOMEM);
err = cache_check(cd, &ek->h, reqp);
if (err)
if (err) {
trace_nfsd_exp_find_key(&key, err);
return ERR_PTR(err);
}
return ek;
}
@ -855,8 +876,10 @@ exp_get_by_name(struct cache_detail *cd, struct auth_domain *clp,
if (exp == NULL)
return ERR_PTR(-ENOMEM);
err = cache_check(cd, &exp->h, reqp);
if (err)
if (err) {
trace_nfsd_exp_get_by_name(&key, err);
return ERR_PTR(err);
}
return exp;
}

2
fs/nfsd/filecache.c
View File

@ -890,7 +890,7 @@ nfsd_file_find_locked(struct inode *inode, unsigned int may_flags,
unsigned char need = may_flags & NFSD_FILE_MAY_MASK;
hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head,
nf_node) {
nf_node, lockdep_is_held(&nfsd_file_hashtbl[hashval].nfb_lock)) {
if ((need & nf->nf_may) != need)
continue;
if (nf->nf_inode != inode)

2
fs/nfsd/netns.h
View File

@ -172,6 +172,8 @@ struct nfsd_net {
unsigned int longest_chain_cachesize;
struct shrinker nfsd_reply_cache_shrinker;
/* utsname taken from the the process that starts the server */
char nfsd_name[UNX_MAXNODENAME+1];
};
/* Simple check to find out if a given net was properly initialized */

14
fs/nfsd/nfs4idmap.c
View File

@ -122,6 +122,12 @@ idtoname_hash(struct ent *ent)
return hash;
}
static int
idtoname_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall_timeout(cd, h);
}
static void
idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
int *blen)
@ -184,6 +190,7 @@ static const struct cache_detail idtoname_cache_template = {
.hash_size = ENT_HASHMAX,
.name = "nfs4.idtoname",
.cache_put = ent_put,
.cache_upcall = idtoname_upcall,
.cache_request = idtoname_request,
.cache_parse = idtoname_parse,
.cache_show = idtoname_show,
@ -295,6 +302,12 @@ nametoid_hash(struct ent *ent)
return hash_str(ent->name, ENT_HASHBITS);
}
static int
nametoid_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall_timeout(cd, h);
}
static void
nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp,
int *blen)
@ -347,6 +360,7 @@ static const struct cache_detail nametoid_cache_template = {
.hash_size = ENT_HASHMAX,
.name = "nfs4.nametoid",
.cache_put = ent_put,
.cache_upcall = nametoid_upcall,
.cache_request = nametoid_request,
.cache_parse = nametoid_parse,
.cache_show = nametoid_show,

87
fs/nfsd/nfs4state.c
View File

@ -494,6 +494,8 @@ find_any_file(struct nfs4_file *f)
{
struct nfsd_file *ret;
if (!f)
return NULL;
spin_lock(&f->fi_lock);
ret = __nfs4_get_fd(f, O_RDWR);
if (!ret) {
@ -1309,6 +1311,12 @@ static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
nfs4_free_stateowner(sop);
}
static bool
nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp)
{
return list_empty(&stp->st_perfile);
}
static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
{
struct nfs4_file *fp = stp->st_stid.sc_file;
@ -1379,9 +1387,11 @@ static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
{
lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
if (!unhash_ol_stateid(stp))
return false;
list_del_init(&stp->st_locks);
nfs4_unhash_stid(&stp->st_stid);
return unhash_ol_stateid(stp);
return true;
}
static void release_lock_stateid(struct nfs4_ol_stateid *stp)
@ -1446,13 +1456,12 @@ static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
struct list_head *reaplist)
{
bool unhashed;
lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
unhashed = unhash_ol_stateid(stp);
if (!unhash_ol_stateid(stp))
return false;
release_open_stateid_locks(stp, reaplist);
return unhashed;
return true;
}
static void release_open_stateid(struct nfs4_ol_stateid *stp)
@ -2636,7 +2645,7 @@ static const struct file_operations client_ctl_fops = {
static const struct tree_descr client_files[] = {
[0] = {"info", &client_info_fops, S_IRUSR},
[1] = {"states", &client_states_fops, S_IRUSR},
[2] = {"ctl", &client_ctl_fops, S_IRUSR|S_IWUSR},
[2] = {"ctl", &client_ctl_fops, S_IWUSR},
[3] = {""},
};
@ -4343,7 +4352,8 @@ find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
{
struct nfs4_file *fp;
hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
lockdep_is_held(&state_lock)) {
if (fh_match(&fp->fi_fhandle, fh)) {
if (refcount_inc_not_zero(&fp->fi_ref))
return fp;
@ -5521,15 +5531,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
CLOSE_STATEID(stateid))
return status;
/* Client debugging aid. */
if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
char addr_str[INET6_ADDRSTRLEN];
rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
sizeof(addr_str));
pr_warn_ratelimited("NFSD: client %s testing state ID "
"with incorrect client ID\n", addr_str);
if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid))
return status;
}
spin_lock(&cl->cl_lock);
s = find_stateid_locked(cl, stateid);
if (!s)
@ -6393,21 +6396,21 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
}
static struct nfs4_ol_stateid *
find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
find_lock_stateid(const struct nfs4_lockowner *lo,
const struct nfs4_ol_stateid *ost)
{
struct nfs4_ol_stateid *lst;
struct nfs4_client *clp = lo->lo_owner.so_client;
lockdep_assert_held(&clp->cl_lock);
lockdep_assert_held(&ost->st_stid.sc_client->cl_lock);
list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
if (lst->st_stid.sc_type != NFS4_LOCK_STID)
continue;
if (lst->st_stid.sc_file == fp) {
refcount_inc(&lst->st_stid.sc_count);
return lst;
/* If ost is not hashed, ost->st_locks will not be valid */
if (!nfs4_ol_stateid_unhashed(ost))
list_for_each_entry(lst, &ost->st_locks, st_locks) {
if (lst->st_stateowner == &lo->lo_owner) {
refcount_inc(&lst->st_stid.sc_count);
return lst;
}
}
}
return NULL;
}
@ -6423,11 +6426,11 @@ init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
retry:
spin_lock(&clp->cl_lock);
spin_lock(&fp->fi_lock);
retstp = find_lock_stateid(lo, fp);
if (nfs4_ol_stateid_unhashed(open_stp))
goto out_close;
retstp = find_lock_stateid(lo, open_stp);
if (retstp)
goto out_unlock;
goto out_found;
refcount_inc(&stp->st_stid.sc_count);
stp->st_stid.sc_type = NFS4_LOCK_STID;
stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
@ -6436,22 +6439,26 @@ retry:
stp->st_access_bmap = 0;
stp->st_deny_bmap = open_stp->st_deny_bmap;
stp->st_openstp = open_stp;
spin_lock(&fp->fi_lock);
list_add(&stp->st_locks, &open_stp->st_locks);
list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
list_add(&stp->st_perfile, &fp->fi_stateids);
out_unlock:
spin_unlock(&fp->fi_lock);
spin_unlock(&clp->cl_lock);
if (retstp) {
if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
nfs4_put_stid(&retstp->st_stid);
goto retry;
}
/* To keep mutex tracking happy */
mutex_unlock(&stp->st_mutex);
stp = retstp;
}
return stp;
out_found:
spin_unlock(&clp->cl_lock);
if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
nfs4_put_stid(&retstp->st_stid);
goto retry;
}
/* To keep mutex tracking happy */
mutex_unlock(&stp->st_mutex);
return retstp;
out_close:
spin_unlock(&clp->cl_lock);
mutex_unlock(&stp->st_mutex);
return NULL;
}
static struct nfs4_ol_stateid *
@ -6466,7 +6473,7 @@ find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
*new = false;
spin_lock(&clp->cl_lock);
lst = find_lock_stateid(lo, fi);
lst = find_lock_stateid(lo, ost);
spin_unlock(&clp->cl_lock);
if (lst != NULL) {
if (nfsd4_lock_ol_stateid(lst) == nfs_ok)

38
fs/nfsd/nfs4xdr.c
View File

@ -3591,23 +3591,22 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
__be32 nfserr;
__be32 tmp;
__be32 *p;
u32 zzz = 0;
int pad;
/*
* svcrdma requires every READ payload to start somewhere
* in xdr->pages.
*/
if (xdr->iov == xdr->buf->head) {
xdr->iov = NULL;
xdr->end = xdr->p;
}
len = maxcount;
v = 0;
thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
p = xdr_reserve_space(xdr, (thislen+3)&~3);
WARN_ON_ONCE(!p);
resp->rqstp->rq_vec[v].iov_base = p;
resp->rqstp->rq_vec[v].iov_len = thislen;
v++;
len -= thislen;
while (len) {
thislen = min_t(long, len, PAGE_SIZE);
p = xdr_reserve_space(xdr, (thislen+3)&~3);
p = xdr_reserve_space(xdr, thislen);
WARN_ON_ONCE(!p);
resp->rqstp->rq_vec[v].iov_base = p;
resp->rqstp->rq_vec[v].iov_len = thislen;
@ -3616,23 +3615,25 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
}
read->rd_vlen = v;
len = maxcount;
nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
&eof);
read->rd_length = maxcount;
if (nfserr)
return nfserr;
xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
if (svc_encode_read_payload(resp->rqstp, starting_len + 8, maxcount))
return nfserr_io;
xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
tmp = htonl(eof);
write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
tmp = htonl(maxcount);
write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
tmp = xdr_zero;
pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
&zzz, pad);
&tmp, pad);
return 0;
}
@ -4005,11 +4006,12 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
int major_id_sz;
int server_scope_sz;
uint64_t minor_id = 0;
struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
major_id = utsname()->nodename;
major_id_sz = strlen(major_id);
server_scope = utsname()->nodename;
server_scope_sz = strlen(server_scope);
major_id = nn->nfsd_name;
major_id_sz = strlen(nn->nfsd_name);
server_scope = nn->nfsd_name;
server_scope_sz = strlen(nn->nfsd_name);
p = xdr_reserve_space(xdr,
8 /* eir_clientid */ +

1
fs/nfsd/nfsctl.c
View File

@ -1333,6 +1333,7 @@ void nfsd_client_rmdir(struct dentry *dentry)
dget(dentry);
ret = simple_rmdir(dir, dentry);
WARN_ON_ONCE(ret);
fsnotify_rmdir(dir, dentry);
d_delete(dentry);
inode_unlock(dir);
}

13
fs/nfsd/nfsfh.c
View File

@ -14,6 +14,7 @@
#include "nfsd.h"
#include "vfs.h"
#include "auth.h"
#include "trace.h"
#define NFSDDBG_FACILITY NFSDDBG_FH
@ -209,11 +210,14 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
}
error = nfserr_stale;
if (PTR_ERR(exp) == -ENOENT)
return error;
if (IS_ERR(exp)) {
trace_nfsd_set_fh_dentry_badexport(rqstp, fhp, PTR_ERR(exp));
if (PTR_ERR(exp) == -ENOENT)
return error;
if (IS_ERR(exp))
return nfserrno(PTR_ERR(exp));
}
if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) {
/* Elevate privileges so that the lack of 'r' or 'x'
@ -267,6 +271,9 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
dentry = exportfs_decode_fh(exp->ex_path.mnt, fid,
data_left, fileid_type,
nfsd_acceptable, exp);
if (IS_ERR_OR_NULL(dentry))
trace_nfsd_set_fh_dentry_badhandle(rqstp, fhp,
dentry ? PTR_ERR(dentry) : -ESTALE);
}
if (dentry == NULL)
goto out;

3
fs/nfsd/nfssvc.c
View File

@ -749,6 +749,9 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
if (nrservs == 0 && nn->nfsd_serv == NULL)
goto out;
strlcpy(nn->nfsd_name, utsname()->nodename,
sizeof(nn->nfsd_name));
error = nfsd_create_serv(net);
if (error)
goto out;

122
fs/nfsd/trace.h
View File

@ -9,6 +9,7 @@
#define _NFSD_TRACE_H
#include <linux/tracepoint.h>
#include "export.h"
#include "nfsfh.h"
TRACE_EVENT(nfsd_compound,
@ -50,6 +51,127 @@ TRACE_EVENT(nfsd_compound_status,
__get_str(name), __entry->status)
)
DECLARE_EVENT_CLASS(nfsd_fh_err_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,
int status),
TP_ARGS(rqstp, fhp, status),
TP_STRUCT__entry(
__field(u32, xid)
__field(u32, fh_hash)
__field(int, status)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(rqstp->rq_xid);
__entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
__entry->status = status;
),
TP_printk("xid=0x%08x fh_hash=0x%08x status=%d",
__entry->xid, __entry->fh_hash,
__entry->status)
)
#define DEFINE_NFSD_FH_ERR_EVENT(name) \
DEFINE_EVENT(nfsd_fh_err_class, nfsd_##name, \
TP_PROTO(struct svc_rqst *rqstp, \
struct svc_fh *fhp, \
int status), \
TP_ARGS(rqstp, fhp, status))
DEFINE_NFSD_FH_ERR_EVENT(set_fh_dentry_badexport);
DEFINE_NFSD_FH_ERR_EVENT(set_fh_dentry_badhandle);
TRACE_EVENT(nfsd_exp_find_key,
TP_PROTO(const struct svc_expkey *key,
int status),
TP_ARGS(key, status),
TP_STRUCT__entry(
__field(int, fsidtype)
__array(u32, fsid, 6)
__string(auth_domain, key->ek_client->name)
__field(int, status)
),
TP_fast_assign(
__entry->fsidtype = key->ek_fsidtype;
memcpy(__entry->fsid, key->ek_fsid, 4*6);
__assign_str(auth_domain, key->ek_client->name);
__entry->status = status;
),
TP_printk("fsid=%x::%s domain=%s status=%d",
__entry->fsidtype,
__print_array(__entry->fsid, 6, 4),
__get_str(auth_domain),
__entry->status
)
);
TRACE_EVENT(nfsd_expkey_update,
TP_PROTO(const struct svc_expkey *key, const char *exp_path),
TP_ARGS(key, exp_path),
TP_STRUCT__entry(
__field(int, fsidtype)
__array(u32, fsid, 6)
__string(auth_domain, key->ek_client->name)
__string(path, exp_path)
__field(bool, cache)
),
TP_fast_assign(
__entry->fsidtype = key->ek_fsidtype;
memcpy(__entry->fsid, key->ek_fsid, 4*6);
__assign_str(auth_domain, key->ek_client->name);
__assign_str(path, exp_path);
__entry->cache = !test_bit(CACHE_NEGATIVE, &key->h.flags);
),
TP_printk("fsid=%x::%s domain=%s path=%s cache=%s",
__entry->fsidtype,
__print_array(__entry->fsid, 6, 4),
__get_str(auth_domain),
__get_str(path),
__entry->cache ? "pos" : "neg"
)
);
TRACE_EVENT(nfsd_exp_get_by_name,
TP_PROTO(const struct svc_export *key,
int status),
TP_ARGS(key, status),
TP_STRUCT__entry(
__string(path, key->ex_path.dentry->d_name.name)
__string(auth_domain, key->ex_client->name)
__field(int, status)
),
TP_fast_assign(
__assign_str(path, key->ex_path.dentry->d_name.name);
__assign_str(auth_domain, key->ex_client->name);
__entry->status = status;
),
TP_printk("path=%s domain=%s status=%d",
__get_str(path),
__get_str(auth_domain),
__entry->status
)
);
TRACE_EVENT(nfsd_export_update,
TP_PROTO(const struct svc_export *key),
TP_ARGS(key),
TP_STRUCT__entry(
__string(path, key->ex_path.dentry->d_name.name)
__string(auth_domain, key->ex_client->name)
__field(bool, cache)
),
TP_fast_assign(
__assign_str(path, key->ex_path.dentry->d_name.name);
__assign_str(auth_domain, key->ex_client->name);
__entry->cache = !test_bit(CACHE_NEGATIVE, &key->h.flags);
),
TP_printk("path=%s domain=%s cache=%s",
__get_str(path),
__get_str(auth_domain),
__entry->cache ? "pos" : "neg"
)
);
DECLARE_EVENT_CLASS(nfsd_io_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,

9
include/linux/sunrpc/cache.h
View File

@ -179,6 +179,9 @@ sunrpc_cache_update(struct cache_detail *detail,
extern int
sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h);
extern int
sunrpc_cache_pipe_upcall_timeout(struct cache_detail *detail,
struct cache_head *h);
extern void cache_clean_deferred(void *owner);
@ -206,11 +209,11 @@ static inline void cache_put(struct cache_head *h, struct cache_detail *cd)
static inline bool cache_is_expired(struct cache_detail *detail, struct cache_head *h)
{
if (h->expiry_time < seconds_since_boot())
return true;
if (!test_bit(CACHE_VALID, &h->flags))
return false;
return (h->expiry_time < seconds_since_boot()) ||
(detail->flush_time >= h->last_refresh);
return detail->flush_time >= h->last_refresh;
}
extern int cache_check(struct cache_detail *detail,

3
include/linux/sunrpc/rpc_rdma.h
View File

@ -58,7 +58,8 @@ enum {
enum {
rpcrdma_fixed_maxsz = 4,
rpcrdma_segment_maxsz = 4,
rpcrdma_readchunk_maxsz = 2 + rpcrdma_segment_maxsz,
rpcrdma_readseg_maxsz = 1 + rpcrdma_segment_maxsz,
rpcrdma_readchunk_maxsz = 1 + rpcrdma_readseg_maxsz,
};
/*

5
include/linux/sunrpc/svc.h
View File

@ -380,7 +380,7 @@ struct svc_deferred_req {
struct cache_deferred_req handle;
size_t xprt_hlen;
int argslen;
__be32 args[0];
__be32 args[];
};
struct svc_process_info {
@ -517,6 +517,9 @@ void svc_wake_up(struct svc_serv *);
void svc_reserve(struct svc_rqst *rqstp, int space);
struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu);
char * svc_print_addr(struct svc_rqst *, char *, size_t);
int svc_encode_read_payload(struct svc_rqst *rqstp,
unsigned int offset,
unsigned int length);
unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
struct page **pages,
struct kvec *first, size_t total);

24
include/linux/sunrpc/svc_rdma.h
View File

@ -52,6 +52,7 @@
/* Default and maximum inline threshold sizes */
enum {
RPCRDMA_PULLUP_THRESH = RPCRDMA_V1_DEF_INLINE_SIZE >> 1,
RPCRDMA_DEF_INLINE_THRESH = 4096,
RPCRDMA_MAX_INLINE_THRESH = 65536
};
@ -132,11 +133,16 @@ struct svc_rdma_recv_ctxt {
struct ib_sge rc_recv_sge;
void *rc_recv_buf;
struct xdr_buf rc_arg;
struct xdr_stream rc_stream;
bool rc_temp;
u32 rc_byte_len;
unsigned int rc_page_count;
unsigned int rc_hdr_count;
u32 rc_inv_rkey;
__be32 *rc_write_list;
__be32 *rc_reply_chunk;
unsigned int rc_read_payload_offset;
unsigned int rc_read_payload_length;
struct page *rc_pages[RPCSVC_MAXPAGES];
};
@ -144,6 +150,8 @@ struct svc_rdma_send_ctxt {
struct list_head sc_list;
struct ib_send_wr sc_send_wr;
struct ib_cqe sc_cqe;
struct xdr_buf sc_hdrbuf;
struct xdr_stream sc_stream;
void *sc_xprt_buf;
int sc_page_count;
int sc_cur_sge_no;
@ -170,9 +178,11 @@ extern int svc_rdma_recv_read_chunk(struct svcxprt_rdma *rdma,
struct svc_rqst *rqstp,
struct svc_rdma_recv_ctxt *head, __be32 *p);
extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma,
__be32 *wr_ch, struct xdr_buf *xdr);
__be32 *wr_ch, struct xdr_buf *xdr,
unsigned int offset,
unsigned long length);
extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
__be32 *rp_ch, bool writelist,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr);
/* svc_rdma_sendto.c */
@ -182,13 +192,13 @@ extern struct svc_rdma_send_ctxt *
extern void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt);
extern int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr);
extern void svc_rdma_sync_reply_hdr(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
unsigned int len);
extern int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
struct xdr_buf *xdr, __be32 *wr_lst);
struct svc_rdma_send_ctxt *sctxt,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr);
extern int svc_rdma_sendto(struct svc_rqst *);
extern int svc_rdma_read_payload(struct svc_rqst *rqstp, unsigned int offset,
unsigned int length);
/* svc_rdma_transport.c */
extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);

2
include/linux/sunrpc/svc_xprt.h
View File

@ -21,6 +21,8 @@ struct svc_xprt_ops {
int (*xpo_has_wspace)(struct svc_xprt *);
int (*xpo_recvfrom)(struct svc_rqst *);
int (*xpo_sendto)(struct svc_rqst *);
int (*xpo_read_payload)(struct svc_rqst *, unsigned int,
unsigned int);
void (*xpo_release_rqst)(struct svc_rqst *);
void (*xpo_detach)(struct svc_xprt *);
void (*xpo_free)(struct svc_xprt *);

67
include/linux/sunrpc/xdr.h
View File

@ -188,20 +188,6 @@ extern int xdr_buf_read_mic(struct xdr_buf *, struct xdr_netobj *, unsigned int)
extern int read_bytes_from_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
extern int write_bytes_to_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
/*
* Helper structure for copying from an sk_buff.
*/
struct xdr_skb_reader {
struct sk_buff *skb;
unsigned int offset;
size_t count;
__wsum csum;
};
typedef size_t (*xdr_skb_read_actor)(struct xdr_skb_reader *desc, void *to, size_t len);
extern int csum_partial_copy_to_xdr(struct xdr_buf *, struct sk_buff *);
extern int xdr_encode_word(struct xdr_buf *, unsigned int, u32);
extern int xdr_decode_word(struct xdr_buf *, unsigned int, u32 *);
@ -300,6 +286,59 @@ xdr_align_size(size_t n)
return (n + mask) & ~mask;
}
/**
* xdr_pad_size - Calculate size of an object's pad
* @n: Size of an object being XDR encoded (in bytes)
*
* This implementation avoids the need for conditional
* branches or modulo division.
*
* Return value:
* Size (in bytes) of the needed XDR pad
*/
static inline size_t xdr_pad_size(size_t n)
{
return xdr_align_size(n) - n;
}
/**
* xdr_stream_encode_item_present - Encode a "present" list item
* @xdr: pointer to xdr_stream
*
* Return values:
* On success, returns length in bytes of XDR buffer consumed
* %-EMSGSIZE on XDR buffer overflow
*/
static inline ssize_t xdr_stream_encode_item_present(struct xdr_stream *xdr)
{
const size_t len = sizeof(__be32);
__be32 *p = xdr_reserve_space(xdr, len);
if (unlikely(!p))
return -EMSGSIZE;
*p = xdr_one;
return len;
}
/**
* xdr_stream_encode_item_absent - Encode a "not present" list item
* @xdr: pointer to xdr_stream
*
* Return values:
* On success, returns length in bytes of XDR buffer consumed
* %-EMSGSIZE on XDR buffer overflow
*/
static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr)
{
const size_t len = sizeof(__be32);
__be32 *p = xdr_reserve_space(xdr, len);
if (unlikely(!p))
return -EMSGSIZE;
*p = xdr_zero;
return len;
}
/**
* xdr_stream_encode_u32 - Encode a 32-bit integer
* @xdr: pointer to xdr_stream

59
include/trace/events/rpcgss.h
View File

@ -126,7 +126,7 @@ DEFINE_GSSAPI_EVENT(verify_mic);
DEFINE_GSSAPI_EVENT(wrap);
DEFINE_GSSAPI_EVENT(unwrap);
TRACE_EVENT(rpcgss_accept_upcall,
TRACE_EVENT(rpcgss_svc_accept_upcall,
TP_PROTO(
__be32 xid,
u32 major_status,
@ -154,6 +154,29 @@ TRACE_EVENT(rpcgss_accept_upcall,
)
);
TRACE_EVENT(rpcgss_svc_accept,
TP_PROTO(
__be32 xid,
size_t len
),
TP_ARGS(xid, len),
TP_STRUCT__entry(
__field(u32, xid)
__field(size_t, len)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(xid);
__entry->len = len;
),
TP_printk("xid=0x%08x len=%zu",
__entry->xid, __entry->len
)
);
/**
** GSS auth unwrap failures
@ -268,6 +291,40 @@ TRACE_EVENT(rpcgss_need_reencode,
__entry->ret ? "" : "un")
);
DECLARE_EVENT_CLASS(rpcgss_svc_seqno_class,
TP_PROTO(
__be32 xid,
u32 seqno
),
TP_ARGS(xid, seqno),
TP_STRUCT__entry(
__field(u32, xid)
__field(u32, seqno)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(xid);
__entry->seqno = seqno;
),
TP_printk("xid=0x%08x seqno=%u, request discarded",
__entry->xid, __entry->seqno)
);
#define DEFINE_SVC_SEQNO_EVENT(name) \
DEFINE_EVENT(rpcgss_svc_seqno_class, rpcgss_svc_##name, \
TP_PROTO( \
__be32 xid, \
u32 seqno \
), \
TP_ARGS(xid, seqno))
DEFINE_SVC_SEQNO_EVENT(large_seqno);
DEFINE_SVC_SEQNO_EVENT(old_seqno);
/**
** gssd upcall related trace events
**/

67
include/trace/events/rpcrdma.h
View File

@ -1469,7 +1469,7 @@ DECLARE_EVENT_CLASS(svcrdma_segment_event,
);
#define DEFINE_SEGMENT_EVENT(name) \
DEFINE_EVENT(svcrdma_segment_event, svcrdma_encode_##name,\
DEFINE_EVENT(svcrdma_segment_event, svcrdma_##name,\
TP_PROTO( \
u32 handle, \
u32 length, \
@ -1477,8 +1477,11 @@ DECLARE_EVENT_CLASS(svcrdma_segment_event,
), \
TP_ARGS(handle, length, offset))
DEFINE_SEGMENT_EVENT(rseg);
DEFINE_SEGMENT_EVENT(wseg);
DEFINE_SEGMENT_EVENT(decode_wseg);
DEFINE_SEGMENT_EVENT(encode_rseg);
DEFINE_SEGMENT_EVENT(send_rseg);
DEFINE_SEGMENT_EVENT(encode_wseg);
DEFINE_SEGMENT_EVENT(send_wseg);
DECLARE_EVENT_CLASS(svcrdma_chunk_event,
TP_PROTO(
@ -1501,17 +1504,19 @@ DECLARE_EVENT_CLASS(svcrdma_chunk_event,
);
#define DEFINE_CHUNK_EVENT(name) \
DEFINE_EVENT(svcrdma_chunk_event, svcrdma_encode_##name,\
DEFINE_EVENT(svcrdma_chunk_event, svcrdma_##name, \
TP_PROTO( \
u32 length \
), \
TP_ARGS(length))
DEFINE_CHUNK_EVENT(pzr);
DEFINE_CHUNK_EVENT(write);
DEFINE_CHUNK_EVENT(reply);
DEFINE_CHUNK_EVENT(send_pzr);
DEFINE_CHUNK_EVENT(encode_write_chunk);
DEFINE_CHUNK_EVENT(send_write_chunk);
DEFINE_CHUNK_EVENT(encode_read_chunk);
DEFINE_CHUNK_EVENT(send_reply_chunk);
TRACE_EVENT(svcrdma_encode_read,
TRACE_EVENT(svcrdma_send_read_chunk,
TP_PROTO(
u32 length,
u32 position
@ -1634,6 +1639,24 @@ TRACE_EVENT(svcrdma_dma_map_rwctx,
)
);
TRACE_EVENT(svcrdma_send_pullup,
TP_PROTO(
unsigned int len
),
TP_ARGS(len),
TP_STRUCT__entry(
__field(unsigned int, len)
),
TP_fast_assign(
__entry->len = len;
),
TP_printk("len=%u", __entry->len)
);
TRACE_EVENT(svcrdma_send_failed,
TP_PROTO(
const struct svc_rqst *rqst,
@ -1813,34 +1836,6 @@ TRACE_EVENT(svcrdma_post_rw,
DEFINE_SENDCOMP_EVENT(read);
DEFINE_SENDCOMP_EVENT(write);
TRACE_EVENT(svcrdma_cm_event,
TP_PROTO(
const struct rdma_cm_event *event,
const struct sockaddr *sap
),
TP_ARGS(event, sap),
TP_STRUCT__entry(
__field(unsigned int, event)
__field(int, status)
__array(__u8, addr, INET6_ADDRSTRLEN + 10)
),
TP_fast_assign(
__entry->event = event->event;
__entry->status = event->status;
snprintf(__entry->addr, sizeof(__entry->addr) - 1,
"%pISpc", sap);
),
TP_printk("addr=%s event=%s (%u/%d)",
__entry->addr,
rdma_show_cm_event(__entry->event),
__entry->event, __entry->status
)
);
TRACE_EVENT(svcrdma_qp_error,
TP_PROTO(
const struct ib_event *event,

76
include/trace/events/sunrpc.h
View File

@ -14,6 +14,49 @@
#include <linux/net.h>
#include <linux/tracepoint.h>
DECLARE_EVENT_CLASS(xdr_buf_class,
TP_PROTO(
const struct xdr_buf *xdr
),
TP_ARGS(xdr),
TP_STRUCT__entry(
__field(const void *, head_base)
__field(size_t, head_len)
__field(const void *, tail_base)
__field(size_t, tail_len)
__field(unsigned int, page_len)
__field(unsigned int, msg_len)
),
TP_fast_assign(
__entry->head_base = xdr->head[0].iov_base;
__entry->head_len = xdr->head[0].iov_len;
__entry->tail_base = xdr->tail[0].iov_base;
__entry->tail_len = xdr->tail[0].iov_len;
__entry->page_len = xdr->page_len;
__entry->msg_len = xdr->len;
),
TP_printk("head=[%p,%zu] page=%u tail=[%p,%zu] len=%u",
__entry->head_base, __entry->head_len, __entry->page_len,
__entry->tail_base, __entry->tail_len, __entry->msg_len
)
);
#define DEFINE_XDRBUF_EVENT(name) \
DEFINE_EVENT(xdr_buf_class, name, \
TP_PROTO( \
const struct xdr_buf *xdr \
), \
TP_ARGS(xdr))
DEFINE_XDRBUF_EVENT(xprt_sendto);
DEFINE_XDRBUF_EVENT(xprt_recvfrom);
DEFINE_XDRBUF_EVENT(svc_recvfrom);
DEFINE_XDRBUF_EVENT(svc_sendto);
TRACE_DEFINE_ENUM(RPC_AUTH_OK);
TRACE_DEFINE_ENUM(RPC_AUTH_BADCRED);
TRACE_DEFINE_ENUM(RPC_AUTH_REJECTEDCRED);
@ -1292,6 +1335,39 @@ DECLARE_EVENT_CLASS(svc_deferred_event,
DEFINE_SVC_DEFERRED_EVENT(drop);
DEFINE_SVC_DEFERRED_EVENT(revisit);
DECLARE_EVENT_CLASS(cache_event,
TP_PROTO(
const struct cache_detail *cd,
const struct cache_head *h
),
TP_ARGS(cd, h),
TP_STRUCT__entry(
__field(const struct cache_head *, h)
__string(name, cd->name)
),
TP_fast_assign(
__entry->h = h;
__assign_str(name, cd->name);
),
TP_printk("cache=%s entry=%p", __get_str(name), __entry->h)
);
#define DEFINE_CACHE_EVENT(name) \
DEFINE_EVENT(cache_event, name, \
TP_PROTO( \
const struct cache_detail *cd, \
const struct cache_head *h \
), \
TP_ARGS(cd, h))
DEFINE_CACHE_EVENT(cache_entry_expired);
DEFINE_CACHE_EVENT(cache_entry_upcall);
DEFINE_CACHE_EVENT(cache_entry_update);
DEFINE_CACHE_EVENT(cache_entry_make_negative);
DEFINE_CACHE_EVENT(cache_entry_no_listener);
#endif /* _TRACE_SUNRPC_H */
#include <trace/define_trace.h>

2
net/sunrpc/auth_gss/auth_gss.c
View File

@ -1877,7 +1877,7 @@ static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
else
iov = snd_buf->head;
p = iov->iov_base + iov->iov_len;
pad = 3 - ((snd_buf->len - offset - 1) & 3);
pad = xdr_pad_size(snd_buf->len - offset);
memset(p, 0, pad);
iov->iov_len += pad;
snd_buf->len += pad;

60
net/sunrpc/auth_gss/svcauth_gss.c
View File

@ -55,10 +55,6 @@
#include "gss_rpc_upcall.h"
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
/* The rpcsec_init cache is used for mapping RPCSEC_GSS_{,CONT_}INIT requests
* into replies.
*
@ -184,6 +180,11 @@ static struct cache_head *rsi_alloc(void)
return NULL;
}
static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall_timeout(cd, h);
}
static void rsi_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
@ -282,6 +283,7 @@ static const struct cache_detail rsi_cache_template = {
.hash_size = RSI_HASHMAX,
.name = "auth.rpcsec.init",
.cache_put = rsi_put,
.cache_upcall = rsi_upcall,
.cache_request = rsi_request,
.cache_parse = rsi_parse,
.match = rsi_match,
@ -428,6 +430,11 @@ rsc_alloc(void)
return NULL;
}
static int rsc_upcall(struct cache_detail *cd, struct cache_head *h)
{
return -EINVAL;
}
static int rsc_parse(struct cache_detail *cd,
char *mesg, int mlen)
{
@ -554,6 +561,7 @@ static const struct cache_detail rsc_cache_template = {
.hash_size = RSC_HASHMAX,
.name = "auth.rpcsec.context",
.cache_put = rsc_put,
.cache_upcall = rsc_upcall,
.cache_parse = rsc_parse,
.match = rsc_match,
.init = rsc_init,
@ -713,14 +721,12 @@ gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
}
if (gc->gc_seq > MAXSEQ) {
dprintk("RPC: svcauth_gss: discarding request with "
"large sequence number %d\n", gc->gc_seq);
trace_rpcgss_svc_large_seqno(rqstp->rq_xid, gc->gc_seq);
*authp = rpcsec_gsserr_ctxproblem;
return SVC_DENIED;
}
if (!gss_check_seq_num(rsci, gc->gc_seq)) {
dprintk("RPC: svcauth_gss: discarding request with "
"old sequence number %d\n", gc->gc_seq);
trace_rpcgss_svc_old_seqno(rqstp->rq_xid, gc->gc_seq);
return SVC_DROP;
}
return SVC_OK;
@ -961,7 +967,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs
/* XXX: This is very inefficient. It would be better to either do
* this while we encrypt, or maybe in the receive code, if we can peak
* ahead and work out the service and mechanism there. */
offset = buf->head[0].iov_len % 4;
offset = xdr_pad_size(buf->head[0].iov_len);
if (offset) {
buf->buflen = RPCSVC_MAXPAYLOAD;
xdr_shift_buf(buf, offset);
@ -1245,7 +1251,6 @@ static int gss_proxy_save_rsc(struct cache_detail *cd,
if (!ud->found_creds) {
/* userspace seem buggy, we should always get at least a
* mapping to nobody */
dprintk("RPC: No creds found!\n");
goto out;
} else {
struct timespec64 boot;
@ -1311,8 +1316,8 @@ static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
if (status)
goto out;
trace_rpcgss_accept_upcall(rqstp->rq_xid, ud.major_status,
ud.minor_status);
trace_rpcgss_svc_accept_upcall(rqstp->rq_xid, ud.major_status,
ud.minor_status);
switch (ud.major_status) {
case GSS_S_CONTINUE_NEEDED:
@ -1320,31 +1325,23 @@ static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
break;
case GSS_S_COMPLETE:
status = gss_proxy_save_rsc(sn->rsc_cache, &ud, &handle);
if (status) {
pr_info("%s: gss_proxy_save_rsc failed (%d)\n",
__func__, status);
if (status)
goto out;
}
cli_handle.data = (u8 *)&handle;
cli_handle.len = sizeof(handle);
break;
default:
ret = SVC_CLOSE;
goto out;
}
/* Got an answer to the upcall; use it: */
if (gss_write_init_verf(sn->rsc_cache, rqstp,
&cli_handle, &ud.major_status)) {
pr_info("%s: gss_write_init_verf failed\n", __func__);
&cli_handle, &ud.major_status))
goto out;
}
if (gss_write_resv(resv, PAGE_SIZE,
&cli_handle, &ud.out_token,
ud.major_status, ud.minor_status)) {
pr_info("%s: gss_write_resv failed\n", __func__);
ud.major_status, ud.minor_status))
goto out;
}
ret = SVC_COMPLETE;
out:
@ -1495,8 +1492,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
int ret;
struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
dprintk("RPC: svcauth_gss: argv->iov_len = %zd\n",
argv->iov_len);
trace_rpcgss_svc_accept(rqstp->rq_xid, argv->iov_len);
*authp = rpc_autherr_badcred;
if (!svcdata)
@ -1680,7 +1676,8 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
goto out;
integ_offset = (u8 *)(p + 1) - (u8 *)resbuf->head[0].iov_base;
integ_len = resbuf->len - integ_offset;
BUG_ON(integ_len % 4);
if (integ_len & 3)
goto out;
*p++ = htonl(integ_len);
*p++ = htonl(gc->gc_seq);
if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len)) {
@ -1704,7 +1701,8 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
resv->iov_len += XDR_QUADLEN(mic.len) << 2;
/* not strictly required: */
resbuf->len += XDR_QUADLEN(mic.len) << 2;
BUG_ON(resv->iov_len > PAGE_SIZE);
if (resv->iov_len > PAGE_SIZE)
goto out_err;
out:
stat = 0;
out_err:
@ -1740,9 +1738,11 @@ svcauth_gss_wrap_resp_priv(struct svc_rqst *rqstp)
* both the head and tail.
*/
if (resbuf->tail[0].iov_base) {
BUG_ON(resbuf->tail[0].iov_base >= resbuf->head[0].iov_base
+ PAGE_SIZE);
BUG_ON(resbuf->tail[0].iov_base < resbuf->head[0].iov_base);
if (resbuf->tail[0].iov_base >=
resbuf->head[0].iov_base + PAGE_SIZE)
return -EINVAL;
if (resbuf->tail[0].iov_base < resbuf->head[0].iov_base)
return -EINVAL;
if (resbuf->tail[0].iov_len + resbuf->head[0].iov_len
+ 2 * RPC_MAX_AUTH_SIZE > PAGE_SIZE)
return -ENOMEM;

128
net/sunrpc/cache.c
View File

@ -32,13 +32,13 @@
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <trace/events/sunrpc.h>
#include "netns.h"
#define RPCDBG_FACILITY RPCDBG_CACHE
static bool cache_defer_req(struct cache_req *req, struct cache_head *item);
static void cache_revisit_request(struct cache_head *item);
static bool cache_listeners_exist(struct cache_detail *detail);
static void cache_init(struct cache_head *h, struct cache_detail *detail)
{
@ -65,13 +65,14 @@ static struct cache_head *sunrpc_cache_find_rcu(struct cache_detail *detail,
rcu_read_lock();
hlist_for_each_entry_rcu(tmp, head, cache_list) {
if (detail->match(tmp, key)) {
if (cache_is_expired(detail, tmp))
continue;
tmp = cache_get_rcu(tmp);
rcu_read_unlock();
return tmp;
}
if (!detail->match(tmp, key))
continue;
if (test_bit(CACHE_VALID, &tmp->flags) &&
cache_is_expired(detail, tmp))
continue;
tmp = cache_get_rcu(tmp);
rcu_read_unlock();
return tmp;
}
rcu_read_unlock();
return NULL;
@ -113,18 +114,21 @@ static struct cache_head *sunrpc_cache_add_entry(struct cache_detail *detail,
spin_lock(&detail->hash_lock);
/* check if entry appeared while we slept */
hlist_for_each_entry_rcu(tmp, head, cache_list) {
if (detail->match(tmp, key)) {
if (cache_is_expired(detail, tmp)) {
sunrpc_begin_cache_remove_entry(tmp, detail);
freeme = tmp;
break;
}
cache_get(tmp);
spin_unlock(&detail->hash_lock);
cache_put(new, detail);
return tmp;
hlist_for_each_entry_rcu(tmp, head, cache_list,
lockdep_is_held(&detail->hash_lock)) {
if (!detail->match(tmp, key))
continue;
if (test_bit(CACHE_VALID, &tmp->flags) &&
cache_is_expired(detail, tmp)) {
sunrpc_begin_cache_remove_entry(tmp, detail);
trace_cache_entry_expired(detail, tmp);
freeme = tmp;
break;
}
cache_get(tmp);
spin_unlock(&detail->hash_lock);
cache_put(new, detail);
return tmp;
}
hlist_add_head_rcu(&new->cache_list, head);
@ -174,6 +178,25 @@ static void cache_fresh_unlocked(struct cache_head *head,
}
}
static void cache_make_negative(struct cache_detail *detail,
struct cache_head *h)
{
set_bit(CACHE_NEGATIVE, &h->flags);
trace_cache_entry_make_negative(detail, h);
}
static void cache_entry_update(struct cache_detail *detail,
struct cache_head *h,
struct cache_head *new)
{
if (!test_bit(CACHE_NEGATIVE, &new->flags)) {
detail->update(h, new);
trace_cache_entry_update(detail, h);
} else {
cache_make_negative(detail, h);
}
}
struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
struct cache_head *new, struct cache_head *old, int hash)
{
@ -186,10 +209,7 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
if (!test_bit(CACHE_VALID, &old->flags)) {
spin_lock(&detail->hash_lock);
if (!test_bit(CACHE_VALID, &old->flags)) {
if (test_bit(CACHE_NEGATIVE, &new->flags))
set_bit(CACHE_NEGATIVE, &old->flags);
else
detail->update(old, new);
cache_entry_update(detail, old, new);
cache_fresh_locked(old, new->expiry_time, detail);
spin_unlock(&detail->hash_lock);
cache_fresh_unlocked(old, detail);
@ -207,10 +227,7 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
detail->init(tmp, old);
spin_lock(&detail->hash_lock);
if (test_bit(CACHE_NEGATIVE, &new->flags))
set_bit(CACHE_NEGATIVE, &tmp->flags);
else
detail->update(tmp, new);
cache_entry_update(detail, tmp, new);
hlist_add_head(&tmp->cache_list, &detail->hash_table[hash]);
detail->entries++;
cache_get(tmp);
@ -224,13 +241,6 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail,
}
EXPORT_SYMBOL_GPL(sunrpc_cache_update);
static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
{
if (cd->cache_upcall)
return cd->cache_upcall(cd, h);
return sunrpc_cache_pipe_upcall(cd, h);
}
static inline int cache_is_valid(struct cache_head *h)
{
if (!test_bit(CACHE_VALID, &h->flags))
@ -259,7 +269,7 @@ static int try_to_negate_entry(struct cache_detail *detail, struct cache_head *h
spin_lock(&detail->hash_lock);
rv = cache_is_valid(h);
if (rv == -EAGAIN) {
set_bit(CACHE_NEGATIVE, &h->flags);
cache_make_negative(detail, h);
cache_fresh_locked(h, seconds_since_boot()+CACHE_NEW_EXPIRY,
detail);
rv = -ENOENT;
@ -303,17 +313,14 @@ int cache_check(struct cache_detail *detail,
(h->expiry_time != 0 && age > refresh_age/2)) {
dprintk("RPC: Want update, refage=%lld, age=%lld\n",
refresh_age, age);
if (!test_and_set_bit(CACHE_PENDING, &h->flags)) {
switch (cache_make_upcall(detail, h)) {
case -EINVAL:
rv = try_to_negate_entry(detail, h);
break;
case -EAGAIN:
cache_fresh_unlocked(h, detail);
break;
}
} else if (!cache_listeners_exist(detail))
switch (detail->cache_upcall(detail, h)) {
case -EINVAL:
rv = try_to_negate_entry(detail, h);
break;
case -EAGAIN:
cache_fresh_unlocked(h, detail);
break;
}
}
if (rv == -EAGAIN) {
@ -468,6 +475,7 @@ static int cache_clean(void)
continue;
sunrpc_begin_cache_remove_entry(ch, current_detail);
trace_cache_entry_expired(current_detail, ch);
rv = 1;
break;
}
@ -1195,20 +1203,12 @@ static bool cache_listeners_exist(struct cache_detail *detail)
*
* Each request is at most one page long.
*/
int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
static int cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
{
char *buf;
struct cache_request *crq;
int ret = 0;
if (!detail->cache_request)
return -EINVAL;
if (!cache_listeners_exist(detail)) {
warn_no_listener(detail);
return -EINVAL;
}
if (test_bit(CACHE_CLEANED, &h->flags))
/* Too late to make an upcall */
return -EAGAIN;
@ -1231,6 +1231,7 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
if (test_bit(CACHE_PENDING, &h->flags)) {
crq->item = cache_get(h);
list_add_tail(&crq->q.list, &detail->queue);
trace_cache_entry_upcall(detail, h);
} else
/* Lost a race, no longer PENDING, so don't enqueue */
ret = -EAGAIN;
@ -1242,8 +1243,27 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
}
return ret;
}
int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
{
if (test_and_set_bit(CACHE_PENDING, &h->flags))
return 0;
return cache_pipe_upcall(detail, h);
}
EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
int sunrpc_cache_pipe_upcall_timeout(struct cache_detail *detail,
struct cache_head *h)
{
if (!cache_listeners_exist(detail)) {
warn_no_listener(detail);
trace_cache_entry_no_listener(detail, h);
return -EINVAL;
}
return sunrpc_cache_pipe_upcall(detail, h);
}
EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall_timeout);
/*
* parse a message from user-space and pass it
* to an appropriate cache

1
net/sunrpc/clnt.c
View File

@ -2509,6 +2509,7 @@ call_decode(struct rpc_task *task)
goto out;
req->rq_rcv_buf.len = req->rq_private_buf.len;
trace_xprt_recvfrom(&req->rq_rcv_buf);
/* Check that the softirq receive buffer is valid */
WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf,

141
net/sunrpc/socklib.c
View File

@ -14,9 +14,24 @@
#include <linux/types.h>
#include <linux/pagemap.h>
#include <linux/udp.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/xdr.h>
#include <linux/export.h>
#include "socklib.h"
/*
* Helper structure for copying from an sk_buff.
*/
struct xdr_skb_reader {
struct sk_buff *skb;
unsigned int offset;
size_t count;
__wsum csum;
};
typedef size_t (*xdr_skb_read_actor)(struct xdr_skb_reader *desc, void *to,
size_t len);
/**
* xdr_skb_read_bits - copy some data bits from skb to internal buffer
@ -186,3 +201,129 @@ no_checksum:
return 0;
}
EXPORT_SYMBOL_GPL(csum_partial_copy_to_xdr);
static inline int xprt_sendmsg(struct socket *sock, struct msghdr *msg,
size_t seek)
{
if (seek)
iov_iter_advance(&msg->msg_iter, seek);
return sock_sendmsg(sock, msg);
}
static int xprt_send_kvec(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t seek)
{
iov_iter_kvec(&msg->msg_iter, WRITE, vec, 1, vec->iov_len);
return xprt_sendmsg(sock, msg, seek);
}
static int xprt_send_pagedata(struct socket *sock, struct msghdr *msg,
struct xdr_buf *xdr, size_t base)
{
int err;
err = xdr_alloc_bvec(xdr, GFP_KERNEL);
if (err < 0)
return err;
iov_iter_bvec(&msg->msg_iter, WRITE, xdr->bvec, xdr_buf_pagecount(xdr),
xdr->page_len + xdr->page_base);
return xprt_sendmsg(sock, msg, base + xdr->page_base);
}
/* Common case:
* - stream transport
* - sending from byte 0 of the message
* - the message is wholly contained in @xdr's head iovec
*/
static int xprt_send_rm_and_kvec(struct socket *sock, struct msghdr *msg,
rpc_fraghdr marker, struct kvec *vec,
size_t base)
{
struct kvec iov[2] = {
[0] = {
.iov_base = &marker,
.iov_len = sizeof(marker)
},
[1] = *vec,
};
size_t len = iov[0].iov_len + iov[1].iov_len;
iov_iter_kvec(&msg->msg_iter, WRITE, iov, 2, len);
return xprt_sendmsg(sock, msg, base);
}
/**
* xprt_sock_sendmsg - write an xdr_buf directly to a socket
* @sock: open socket to send on
* @msg: socket message metadata
* @xdr: xdr_buf containing this request
* @base: starting position in the buffer
* @marker: stream record marker field
* @sent_p: return the total number of bytes successfully queued for sending
*
* Return values:
* On success, returns zero and fills in @sent_p.
* %-ENOTSOCK if @sock is not a struct socket.
*/
int xprt_sock_sendmsg(struct socket *sock, struct msghdr *msg,
struct xdr_buf *xdr, unsigned int base,
rpc_fraghdr marker, unsigned int *sent_p)
{
unsigned int rmsize = marker ? sizeof(marker) : 0;
unsigned int remainder = rmsize + xdr->len - base;
unsigned int want;
int err = 0;
*sent_p = 0;
if (unlikely(!sock))
return -ENOTSOCK;
msg->msg_flags |= MSG_MORE;
want = xdr->head[0].iov_len + rmsize;
if (base < want) {
unsigned int len = want - base;
remainder -= len;
if (remainder == 0)
msg->msg_flags &= ~MSG_MORE;
if (rmsize)
err = xprt_send_rm_and_kvec(sock, msg, marker,
&xdr->head[0], base);
else
err = xprt_send_kvec(sock, msg, &xdr->head[0], base);
if (remainder == 0 || err != len)
goto out;
*sent_p += err;
base = 0;
} else {
base -= want;
}
if (base < xdr->page_len) {
unsigned int len = xdr->page_len - base;
remainder -= len;
if (remainder == 0)
msg->msg_flags &= ~MSG_MORE;
err = xprt_send_pagedata(sock, msg, xdr, base);
if (remainder == 0 || err != len)
goto out;
*sent_p += err;
base = 0;
} else {
base -= xdr->page_len;
}
if (base >= xdr->tail[0].iov_len)
return 0;
msg->msg_flags &= ~MSG_MORE;
err = xprt_send_kvec(sock, msg, &xdr->tail[0], base);
out:
if (err > 0) {
*sent_p += err;
err = 0;
}
return err;
}

15
net/sunrpc/socklib.h Normal file
View File

@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
* Copyright (C) 2020, Oracle.
*/
#ifndef _NET_SUNRPC_SOCKLIB_H_
#define _NET_SUNRPC_SOCKLIB_H_
int csum_partial_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb);
int xprt_sock_sendmsg(struct socket *sock, struct msghdr *msg,
struct xdr_buf *xdr, unsigned int base,
rpc_fraghdr marker, unsigned int *sent_p);
#endif /* _NET_SUNRPC_SOCKLIB_H_ */

4
net/sunrpc/sunrpc.h
View File

@ -50,10 +50,6 @@ static inline int sock_is_loopback(struct sock *sk)
return loopback;
}
int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
struct page *headpage, unsigned long headoffset,
struct page *tailpage, unsigned long tailoffset);
int rpc_clients_notifier_register(void);
void rpc_clients_notifier_unregister(void);
#endif /* _NET_SUNRPC_SUNRPC_H */

20
net/sunrpc/svc.c
View File

@ -1529,10 +1529,6 @@ svc_process(struct svc_rqst *rqstp)
goto out_drop;
}
/* Reserve space for the record marker */
if (rqstp->rq_prot == IPPROTO_TCP)
svc_putnl(resv, 0);
/* Returns 1 for send, 0 for drop */
if (likely(svc_process_common(rqstp, argv, resv)))
return svc_send(rqstp);
@ -1636,6 +1632,22 @@ u32 svc_max_payload(const struct svc_rqst *rqstp)
}
EXPORT_SYMBOL_GPL(svc_max_payload);
/**
* svc_encode_read_payload - mark a range of bytes as a READ payload
* @rqstp: svc_rqst to operate on
* @offset: payload's byte offset in rqstp->rq_res
* @length: size of payload, in bytes
*
* Returns zero on success, or a negative errno if a permanent
* error occurred.
*/
int svc_encode_read_payload(struct svc_rqst *rqstp, unsigned int offset,
unsigned int length)
{
return rqstp->rq_xprt->xpt_ops->xpo_read_payload(rqstp, offset, length);
}
EXPORT_SYMBOL_GPL(svc_encode_read_payload);
/**
* svc_fill_write_vector - Construct data argument for VFS write call
* @rqstp: svc_rqst to operate on

22
net/sunrpc/svc_xprt.c
View File

@ -104,8 +104,17 @@ void svc_unreg_xprt_class(struct svc_xprt_class *xcl)
}
EXPORT_SYMBOL_GPL(svc_unreg_xprt_class);
/*
* Format the transport list for printing
/**
* svc_print_xprts - Format the transport list for printing
* @buf: target buffer for formatted address
* @maxlen: length of target buffer
*
* Fills in @buf with a string containing a list of transport names, each name
* terminated with '\n'. If the buffer is too small, some entries may be
* missing, but it is guaranteed that all lines in the output buffer are
* complete.
*
* Returns positive length of the filled-in string.
*/
int svc_print_xprts(char *buf, int maxlen)
{
@ -118,9 +127,9 @@ int svc_print_xprts(char *buf, int maxlen)
list_for_each_entry(xcl, &svc_xprt_class_list, xcl_list) {
int slen;
sprintf(tmpstr, "%s %d\n", xcl->xcl_name, xcl->xcl_max_payload);
slen = strlen(tmpstr);
if (len + slen > maxlen)
slen = snprintf(tmpstr, sizeof(tmpstr), "%s %d\n",
xcl->xcl_name, xcl->xcl_max_payload);
if (slen >= sizeof(tmpstr) || len + slen >= maxlen)
break;
len += slen;
strcat(buf, tmpstr);
@ -802,6 +811,8 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
len = svc_deferred_recv(rqstp);
else
len = xprt->xpt_ops->xpo_recvfrom(rqstp);
if (len > 0)
trace_svc_recvfrom(&rqstp->rq_arg);
rqstp->rq_stime = ktime_get();
rqstp->rq_reserved = serv->sv_max_mesg;
atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
@ -905,6 +916,7 @@ int svc_send(struct svc_rqst *rqstp)
xb->len = xb->head[0].iov_len +
xb->page_len +
xb->tail[0].iov_len;
trace_svc_sendto(xb);
/* Grab mutex to serialize outgoing data. */
mutex_lock(&xprt->xpt_mutex);

12
net/sunrpc/svcauth_unix.c
View File

@ -148,6 +148,11 @@ static struct cache_head *ip_map_alloc(void)
return NULL;
}
static int ip_map_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall(cd, h);
}
static void ip_map_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
@ -467,6 +472,11 @@ static struct cache_head *unix_gid_alloc(void)
return NULL;
}
static int unix_gid_upcall(struct cache_detail *cd, struct cache_head *h)
{
return sunrpc_cache_pipe_upcall_timeout(cd, h);
}
static void unix_gid_request(struct cache_detail *cd,
struct cache_head *h,
char **bpp, int *blen)
@ -584,6 +594,7 @@ static const struct cache_detail unix_gid_cache_template = {
.hash_size = GID_HASHMAX,
.name = "auth.unix.gid",
.cache_put = unix_gid_put,
.cache_upcall = unix_gid_upcall,
.cache_request = unix_gid_request,
.cache_parse = unix_gid_parse,
.cache_show = unix_gid_show,
@ -881,6 +892,7 @@ static const struct cache_detail ip_map_cache_template = {
.hash_size = IP_HASHMAX,
.name = "auth.unix.ip",
.cache_put = ip_map_put,
.cache_upcall = ip_map_upcall,
.cache_request = ip_map_request,
.cache_parse = ip_map_parse,
.cache_show = ip_map_show,

202
net/sunrpc/svcsock.c
View File

@ -55,6 +55,7 @@
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/xprt.h>
#include "socklib.h"
#include "sunrpc.h"
#define RPCDBG_FACILITY RPCDBG_SVCXPRT
@ -174,109 +175,10 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
}
}
/*
* send routine intended to be shared by the fore- and back-channel
*/
int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
struct page *headpage, unsigned long headoffset,
struct page *tailpage, unsigned long tailoffset)
static int svc_sock_read_payload(struct svc_rqst *rqstp, unsigned int offset,
unsigned int length)
{
int result;
int size;
struct page **ppage = xdr->pages;
size_t base = xdr->page_base;
unsigned int pglen = xdr->page_len;
unsigned int flags = MSG_MORE | MSG_SENDPAGE_NOTLAST;
int slen;
int len = 0;
slen = xdr->len;
/* send head */
if (slen == xdr->head[0].iov_len)
flags = 0;
len = kernel_sendpage(sock, headpage, headoffset,
xdr->head[0].iov_len, flags);
if (len != xdr->head[0].iov_len)
goto out;
slen -= xdr->head[0].iov_len;
if (slen == 0)
goto out;
/* send page data */
size = PAGE_SIZE - base < pglen ? PAGE_SIZE - base : pglen;
while (pglen > 0) {
if (slen == size)
flags = 0;
result = kernel_sendpage(sock, *ppage, base, size, flags);
if (result > 0)
len += result;
if (result != size)
goto out;
slen -= size;
pglen -= size;
size = PAGE_SIZE < pglen ? PAGE_SIZE : pglen;
base = 0;
ppage++;
}
/* send tail */
if (xdr->tail[0].iov_len) {
result = kernel_sendpage(sock, tailpage, tailoffset,
xdr->tail[0].iov_len, 0);
if (result > 0)
len += result;
}
out:
return len;
}
/*
* Generic sendto routine
*/
static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
{
struct svc_sock *svsk =
container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
struct socket *sock = svsk->sk_sock;
union {
struct cmsghdr hdr;
long all[SVC_PKTINFO_SPACE / sizeof(long)];
} buffer;
struct cmsghdr *cmh = &buffer.hdr;
int len = 0;
unsigned long tailoff;
unsigned long headoff;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
if (rqstp->rq_prot == IPPROTO_UDP) {
struct msghdr msg = {
.msg_name = &rqstp->rq_addr,
.msg_namelen = rqstp->rq_addrlen,
.msg_control = cmh,
.msg_controllen = sizeof(buffer),
.msg_flags = MSG_MORE,
};
svc_set_cmsg_data(rqstp, cmh);
if (sock_sendmsg(sock, &msg) < 0)
goto out;
}
tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1);
headoff = 0;
len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff,
rqstp->rq_respages[0], tailoff);
out:
dprintk("svc: socket %p sendto([%p %zu... ], %d) = %d (addr %s)\n",
svsk, xdr->head[0].iov_base, xdr->head[0].iov_len,
xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
return len;
return 0;
}
/*
@ -600,17 +502,43 @@ out_free:
return 0;
}
static int
svc_udp_sendto(struct svc_rqst *rqstp)
/**
* svc_udp_sendto - Send out a reply on a UDP socket
* @rqstp: completed svc_rqst
*
* Returns the number of bytes sent, or a negative errno.
*/
static int svc_udp_sendto(struct svc_rqst *rqstp)
{
int error;
struct svc_xprt *xprt = rqstp->rq_xprt;
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
struct xdr_buf *xdr = &rqstp->rq_res;
union {
struct cmsghdr hdr;
long all[SVC_PKTINFO_SPACE / sizeof(long)];
} buffer;
struct cmsghdr *cmh = &buffer.hdr;
struct msghdr msg = {
.msg_name = &rqstp->rq_addr,
.msg_namelen = rqstp->rq_addrlen,
.msg_control = cmh,
.msg_controllen = sizeof(buffer),
};
unsigned int uninitialized_var(sent);
int err;
error = svc_sendto(rqstp, &rqstp->rq_res);
if (error == -ECONNREFUSED)
svc_set_cmsg_data(rqstp, cmh);
err = xprt_sock_sendmsg(svsk->sk_sock, &msg, xdr, 0, 0, &sent);
xdr_free_bvec(xdr);
if (err == -ECONNREFUSED) {
/* ICMP error on earlier request. */
error = svc_sendto(rqstp, &rqstp->rq_res);
return error;
err = xprt_sock_sendmsg(svsk->sk_sock, &msg, xdr, 0, 0, &sent);
xdr_free_bvec(xdr);
}
if (err < 0)
return err;
return sent;
}
static int svc_udp_has_wspace(struct svc_xprt *xprt)
@ -653,6 +581,7 @@ static const struct svc_xprt_ops svc_udp_ops = {
.xpo_create = svc_udp_create,
.xpo_recvfrom = svc_udp_recvfrom,
.xpo_sendto = svc_udp_sendto,
.xpo_read_payload = svc_sock_read_payload,
.xpo_release_rqst = svc_release_udp_skb,
.xpo_detach = svc_sock_detach,
.xpo_free = svc_sock_free,
@ -1128,35 +1057,39 @@ err_noclose:
return 0; /* record not complete */
}
/*
* Send out data on TCP socket.
/**
* svc_tcp_sendto - Send out a reply on a TCP socket
* @rqstp: completed svc_rqst
*
* Returns the number of bytes sent, or a negative errno.
*/
static int svc_tcp_sendto(struct svc_rqst *rqstp)
{
struct xdr_buf *xbufp = &rqstp->rq_res;
int sent;
__be32 reclen;
struct svc_xprt *xprt = rqstp->rq_xprt;
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
struct xdr_buf *xdr = &rqstp->rq_res;
rpc_fraghdr marker = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT |
(u32)xdr->len);
struct msghdr msg = {
.msg_flags = 0,
};
unsigned int uninitialized_var(sent);
int err;
/* Set up the first element of the reply kvec.
* Any other kvecs that may be in use have been taken
* care of by the server implementation itself.
*/
reclen = htonl(0x80000000|((xbufp->len ) - 4));
memcpy(xbufp->head[0].iov_base, &reclen, 4);
sent = svc_sendto(rqstp, &rqstp->rq_res);
if (sent != xbufp->len) {
printk(KERN_NOTICE
"rpc-srv/tcp: %s: %s %d when sending %d bytes "
"- shutting down socket\n",
rqstp->rq_xprt->xpt_server->sv_name,
(sent<0)?"got error":"sent only",
sent, xbufp->len);
set_bit(XPT_CLOSE, &rqstp->rq_xprt->xpt_flags);
svc_xprt_enqueue(rqstp->rq_xprt);
sent = -EAGAIN;
}
err = xprt_sock_sendmsg(svsk->sk_sock, &msg, xdr, 0, marker, &sent);
xdr_free_bvec(xdr);
if (err < 0 || sent != (xdr->len + sizeof(marker)))
goto out_close;
return sent;
out_close:
pr_notice("rpc-srv/tcp: %s: %s %d when sending %d bytes - shutting down socket\n",
xprt->xpt_server->sv_name,
(err < 0) ? "got error" : "sent",
(err < 0) ? err : sent, xdr->len);
set_bit(XPT_CLOSE, &xprt->xpt_flags);
svc_xprt_enqueue(xprt);
return -EAGAIN;
}
static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
@ -1171,6 +1104,7 @@ static const struct svc_xprt_ops svc_tcp_ops = {
.xpo_create = svc_tcp_create,
.xpo_recvfrom = svc_tcp_recvfrom,
.xpo_sendto = svc_tcp_sendto,
.xpo_read_payload = svc_sock_read_payload,
.xpo_release_rqst = svc_release_skb,
.xpo_detach = svc_tcp_sock_detach,
.xpo_free = svc_sock_free,

3
net/sunrpc/xprt.c
View File

@ -1117,8 +1117,6 @@ void xprt_complete_rqst(struct rpc_task *task, int copied)
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt;
dprintk("RPC: %5u xid %08x complete (%d bytes received)\n",
task->tk_pid, ntohl(req->rq_xid), copied);
trace_xprt_complete_rqst(xprt, req->rq_xid, copied);
xprt->stat.recvs++;
@ -1462,6 +1460,7 @@ xprt_request_transmit(struct rpc_rqst *req, struct rpc_task *snd_task)
*/
req->rq_ntrans++;
trace_xprt_sendto(&req->rq_snd_buf);
connect_cookie = xprt->connect_cookie;
status = xprt->ops->send_request(req);
if (status != 0) {

36
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -275,32 +275,6 @@ out:
return n;
}
static inline int
encode_item_present(struct xdr_stream *xdr)
{
__be32 *p;
p = xdr_reserve_space(xdr, sizeof(*p));
if (unlikely(!p))
return -EMSGSIZE;
*p = xdr_one;
return 0;
}
static inline int
encode_item_not_present(struct xdr_stream *xdr)
{
__be32 *p;
p = xdr_reserve_space(xdr, sizeof(*p));
if (unlikely(!p))
return -EMSGSIZE;
*p = xdr_zero;
return 0;
}
static void
xdr_encode_rdma_segment(__be32 *iptr, struct rpcrdma_mr *mr)
{
@ -414,7 +388,7 @@ static int rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt,
} while (nsegs);
done:
return encode_item_not_present(xdr);
return xdr_stream_encode_item_absent(xdr);
}
/* Register and XDR encode the Write list. Supports encoding a list
@ -453,7 +427,7 @@ static int rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt,
if (nsegs < 0)
return nsegs;
if (encode_item_present(xdr) < 0)
if (xdr_stream_encode_item_present(xdr) < 0)
return -EMSGSIZE;
segcount = xdr_reserve_space(xdr, sizeof(*segcount));
if (unlikely(!segcount))
@ -480,7 +454,7 @@ static int rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt,
*segcount = cpu_to_be32(nchunks);
done:
return encode_item_not_present(xdr);
return xdr_stream_encode_item_absent(xdr);
}
/* Register and XDR encode the Reply chunk. Supports encoding an array
@ -507,14 +481,14 @@ static int rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt,
__be32 *segcount;
if (wtype != rpcrdma_replych)
return encode_item_not_present(xdr);
return xdr_stream_encode_item_absent(xdr);
seg = req->rl_segments;
nsegs = rpcrdma_convert_iovs(r_xprt, &rqst->rq_rcv_buf, 0, wtype, seg);
if (nsegs < 0)
return nsegs;
if (encode_item_present(xdr) < 0)
if (xdr_stream_encode_item_present(xdr) < 0)
return -EMSGSIZE;
segcount = xdr_reserve_space(xdr, sizeof(*segcount));
if (unlikely(!segcount))

17
net/sunrpc/xprtrdma/svc_rdma_backchannel.c
View File

@ -117,7 +117,7 @@ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma,
{
int ret;
ret = svc_rdma_map_reply_msg(rdma, ctxt, &rqst->rq_snd_buf, NULL);
ret = svc_rdma_map_reply_msg(rdma, ctxt, NULL, &rqst->rq_snd_buf);
if (ret < 0)
return -EIO;
@ -181,7 +181,9 @@ rpcrdma_bc_send_request(struct svcxprt_rdma *rdma, struct rpc_rqst *rqst)
if (!ctxt)
goto drop_connection;
p = ctxt->sc_xprt_buf;
p = xdr_reserve_space(&ctxt->sc_stream, RPCRDMA_HDRLEN_MIN);
if (!p)
goto put_ctxt;
*p++ = rqst->rq_xid;
*p++ = rpcrdma_version;
*p++ = cpu_to_be32(r_xprt->rx_buf.rb_bc_max_requests);
@ -189,7 +191,6 @@ rpcrdma_bc_send_request(struct svcxprt_rdma *rdma, struct rpc_rqst *rqst)
*p++ = xdr_zero;
*p++ = xdr_zero;
*p = xdr_zero;
svc_rdma_sync_reply_hdr(rdma, ctxt, RPCRDMA_HDRLEN_MIN);
#ifdef SVCRDMA_BACKCHANNEL_DEBUG
pr_info("%s: %*ph\n", __func__, 64, rqst->rq_buffer);
@ -197,12 +198,13 @@ rpcrdma_bc_send_request(struct svcxprt_rdma *rdma, struct rpc_rqst *rqst)
rqst->rq_xtime = ktime_get();
rc = svc_rdma_bc_sendto(rdma, rqst, ctxt);
if (rc) {
svc_rdma_send_ctxt_put(rdma, ctxt);
goto drop_connection;
}
if (rc)
goto put_ctxt;
return 0;
put_ctxt:
svc_rdma_send_ctxt_put(rdma, ctxt);
drop_connection:
dprintk("svcrdma: failed to send bc call\n");
return -ENOTCONN;
@ -250,6 +252,7 @@ xprt_rdma_bc_put(struct rpc_xprt *xprt)
{
dprintk("svcrdma: %s: xprt %p\n", __func__, xprt);
xprt_rdma_free_addresses(xprt);
xprt_free(xprt);
}

246
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View File

@ -193,6 +193,7 @@ svc_rdma_recv_ctxt_get(struct svcxprt_rdma *rdma)
out:
ctxt->rc_page_count = 0;
ctxt->rc_read_payload_length = 0;
return ctxt;
out_empty:
@ -357,15 +358,14 @@ static void svc_rdma_build_arg_xdr(struct svc_rqst *rqstp,
arg->len = ctxt->rc_byte_len;
}
/* This accommodates the largest possible Write chunk,
* in one segment.
/* This accommodates the largest possible Write chunk.
*/
#define MAX_BYTES_WRITE_SEG ((u32)(RPCSVC_MAXPAGES << PAGE_SHIFT))
#define MAX_BYTES_WRITE_CHUNK ((u32)(RPCSVC_MAXPAGES << PAGE_SHIFT))
/* This accommodates the largest possible Position-Zero
* Read chunk or Reply chunk, in one segment.
* Read chunk or Reply chunk.
*/
#define MAX_BYTES_SPECIAL_SEG ((u32)((RPCSVC_MAXPAGES + 2) << PAGE_SHIFT))
#define MAX_BYTES_SPECIAL_CHUNK ((u32)((RPCSVC_MAXPAGES + 2) << PAGE_SHIFT))
/* Sanity check the Read list.
*
@ -373,7 +373,7 @@ static void svc_rdma_build_arg_xdr(struct svc_rqst *rqstp,
* - This implementation supports only one Read chunk.
*
* Sanity checks:
* - Read list does not overflow buffer.
* - Read list does not overflow Receive buffer.
* - Segment size limited by largest NFS data payload.
*
* The segment count is limited to how many segments can
@ -381,30 +381,44 @@ static void svc_rdma_build_arg_xdr(struct svc_rqst *rqstp,
* buffer. That's about 40 Read segments for a 1KB inline
* threshold.
*
* Returns pointer to the following Write list.
* Return values:
* %true: Read list is valid. @rctxt's xdr_stream is updated
* to point to the first byte past the Read list.
* %false: Read list is corrupt. @rctxt's xdr_stream is left
* in an unknown state.
*/
static __be32 *xdr_check_read_list(__be32 *p, const __be32 *end)
static bool xdr_check_read_list(struct svc_rdma_recv_ctxt *rctxt)
{
u32 position;
u32 position, len;
bool first;
__be32 *p;
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
len = 0;
first = true;
while (*p++ != xdr_zero) {
if (first) {
position = be32_to_cpup(p++);
first = false;
} else if (be32_to_cpup(p++) != position) {
return NULL;
}
p++; /* handle */
if (be32_to_cpup(p++) > MAX_BYTES_SPECIAL_SEG)
return NULL;
p += 2; /* offset */
while (*p != xdr_zero) {
p = xdr_inline_decode(&rctxt->rc_stream,
rpcrdma_readseg_maxsz * sizeof(*p));
if (!p)
return false;
if (p > end)
return NULL;
if (first) {
position = be32_to_cpup(p);
first = false;
} else if (be32_to_cpup(p) != position) {
return false;
}
p += 2;
len += be32_to_cpup(p);
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
}
return p;
return len <= MAX_BYTES_SPECIAL_CHUNK;
}
/* The segment count is limited to how many segments can
@ -412,67 +426,100 @@ static __be32 *xdr_check_read_list(__be32 *p, const __be32 *end)
* buffer. That's about 60 Write segments for a 1KB inline
* threshold.
*/
static __be32 *xdr_check_write_chunk(__be32 *p, const __be32 *end,
u32 maxlen)
static bool xdr_check_write_chunk(struct svc_rdma_recv_ctxt *rctxt, u32 maxlen)
{
u32 i, segcount;
u32 i, segcount, total;
__be32 *p;
segcount = be32_to_cpup(p++);
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
segcount = be32_to_cpup(p);
total = 0;
for (i = 0; i < segcount; i++) {
p++; /* handle */
if (be32_to_cpup(p++) > maxlen)
return NULL;
p += 2; /* offset */
u32 handle, length;
u64 offset;
if (p > end)
return NULL;
p = xdr_inline_decode(&rctxt->rc_stream,
rpcrdma_segment_maxsz * sizeof(*p));
if (!p)
return false;
handle = be32_to_cpup(p++);
length = be32_to_cpup(p++);
xdr_decode_hyper(p, &offset);
trace_svcrdma_decode_wseg(handle, length, offset);
total += length;
}
return p;
return total <= maxlen;
}
/* Sanity check the Write list.
*
* Implementation limits:
* - This implementation supports only one Write chunk.
* - This implementation currently supports only one Write chunk.
*
* Sanity checks:
* - Write list does not overflow buffer.
* - Segment size limited by largest NFS data payload.
* - Write list does not overflow Receive buffer.
* - Chunk size limited by largest NFS data payload.
*
* Returns pointer to the following Reply chunk.
* Return values:
* %true: Write list is valid. @rctxt's xdr_stream is updated
* to point to the first byte past the Write list.
* %false: Write list is corrupt. @rctxt's xdr_stream is left
* in an unknown state.
*/
static __be32 *xdr_check_write_list(__be32 *p, const __be32 *end)
static bool xdr_check_write_list(struct svc_rdma_recv_ctxt *rctxt)
{
u32 chcount;
u32 chcount = 0;
__be32 *p;
chcount = 0;
while (*p++ != xdr_zero) {
p = xdr_check_write_chunk(p, end, MAX_BYTES_WRITE_SEG);
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
rctxt->rc_write_list = p;
while (*p != xdr_zero) {
if (!xdr_check_write_chunk(rctxt, MAX_BYTES_WRITE_CHUNK))
return false;
++chcount;
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return NULL;
if (chcount++ > 1)
return NULL;
return false;
}
return p;
if (!chcount)
rctxt->rc_write_list = NULL;
return chcount < 2;
}
/* Sanity check the Reply chunk.
*
* Sanity checks:
* - Reply chunk does not overflow buffer.
* - Segment size limited by largest NFS data payload.
* - Reply chunk does not overflow Receive buffer.
* - Chunk size limited by largest NFS data payload.
*
* Returns pointer to the following RPC header.
* Return values:
* %true: Reply chunk is valid. @rctxt's xdr_stream is updated
* to point to the first byte past the Reply chunk.
* %false: Reply chunk is corrupt. @rctxt's xdr_stream is left
* in an unknown state.
*/
static __be32 *xdr_check_reply_chunk(__be32 *p, const __be32 *end)
static bool xdr_check_reply_chunk(struct svc_rdma_recv_ctxt *rctxt)
{
if (*p++ != xdr_zero) {
p = xdr_check_write_chunk(p, end, MAX_BYTES_SPECIAL_SEG);
if (!p)
return NULL;
__be32 *p;
p = xdr_inline_decode(&rctxt->rc_stream, sizeof(*p));
if (!p)
return false;
rctxt->rc_reply_chunk = p;
if (*p != xdr_zero) {
if (!xdr_check_write_chunk(rctxt, MAX_BYTES_SPECIAL_CHUNK))
return false;
} else {
rctxt->rc_reply_chunk = NULL;
}
return p;
return true;
}
/* RPC-over-RDMA Version One private extension: Remote Invalidation.
@ -537,60 +584,61 @@ static void svc_rdma_get_inv_rkey(struct svcxprt_rdma *rdma,
ctxt->rc_inv_rkey = be32_to_cpu(inv_rkey);
}
/* On entry, xdr->head[0].iov_base points to first byte in the
* RPC-over-RDMA header.
/**
* svc_rdma_xdr_decode_req - Decode the transport header
* @rq_arg: xdr_buf containing ingress RPC/RDMA message
* @rctxt: state of decoding
*
* On entry, xdr->head[0].iov_base points to first byte of the
* RPC-over-RDMA transport header.
*
* On successful exit, head[0] points to first byte past the
* RPC-over-RDMA header. For RDMA_MSG, this is the RPC message.
*
* The length of the RPC-over-RDMA header is returned.
*
* Assumptions:
* - The transport header is entirely contained in the head iovec.
*/
static int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg)
static int svc_rdma_xdr_decode_req(struct xdr_buf *rq_arg,
struct svc_rdma_recv_ctxt *rctxt)
{
__be32 *p, *end, *rdma_argp;
__be32 *p, *rdma_argp;
unsigned int hdr_len;
/* Verify that there's enough bytes for header + something */
if (rq_arg->len <= RPCRDMA_HDRLEN_ERR)
goto out_short;
rdma_argp = rq_arg->head[0].iov_base;
if (*(rdma_argp + 1) != rpcrdma_version)
goto out_version;
xdr_init_decode(&rctxt->rc_stream, rq_arg, rdma_argp, NULL);
switch (*(rdma_argp + 3)) {
p = xdr_inline_decode(&rctxt->rc_stream,
rpcrdma_fixed_maxsz * sizeof(*p));
if (unlikely(!p))
goto out_short;
p++;
if (*p != rpcrdma_version)
goto out_version;
p += 2;
switch (*p) {
case rdma_msg:
break;
case rdma_nomsg:
break;
case rdma_done:
goto out_drop;
case rdma_error:
goto out_drop;
default:
goto out_proc;
}
end = (__be32 *)((unsigned long)rdma_argp + rq_arg->len);
p = xdr_check_read_list(rdma_argp + 4, end);
if (!p)
if (!xdr_check_read_list(rctxt))
goto out_inval;
p = xdr_check_write_list(p, end);
if (!p)
if (!xdr_check_write_list(rctxt))
goto out_inval;
p = xdr_check_reply_chunk(p, end);
if (!p)
goto out_inval;
if (p > end)
if (!xdr_check_reply_chunk(rctxt))
goto out_inval;
rq_arg->head[0].iov_base = p;
hdr_len = (unsigned long)p - (unsigned long)rdma_argp;
rq_arg->head[0].iov_base = rctxt->rc_stream.p;
hdr_len = xdr_stream_pos(&rctxt->rc_stream);
rq_arg->head[0].iov_len -= hdr_len;
rq_arg->len -= hdr_len;
trace_svcrdma_decode_rqst(rdma_argp, hdr_len);
@ -650,7 +698,6 @@ static void svc_rdma_send_error(struct svcxprt_rdma *xprt,
__be32 *rdma_argp, int status)
{
struct svc_rdma_send_ctxt *ctxt;
unsigned int length;
__be32 *p;
int ret;
@ -658,29 +705,46 @@ static void svc_rdma_send_error(struct svcxprt_rdma *xprt,
if (!ctxt)
return;
p = ctxt->sc_xprt_buf;
p = xdr_reserve_space(&ctxt->sc_stream,
rpcrdma_fixed_maxsz * sizeof(*p));
if (!p)
goto put_ctxt;
*p++ = *rdma_argp;
*p++ = *(rdma_argp + 1);
*p++ = xprt->sc_fc_credits;
*p++ = rdma_error;
*p = rdma_error;
switch (status) {
case -EPROTONOSUPPORT:
p = xdr_reserve_space(&ctxt->sc_stream, 3 * sizeof(*p));
if (!p)
goto put_ctxt;
*p++ = err_vers;
*p++ = rpcrdma_version;
*p++ = rpcrdma_version;
*p = rpcrdma_version;
trace_svcrdma_err_vers(*rdma_argp);
break;
default:
*p++ = err_chunk;
p = xdr_reserve_space(&ctxt->sc_stream, sizeof(*p));
if (!p)
goto put_ctxt;
*p = err_chunk;
trace_svcrdma_err_chunk(*rdma_argp);
}
length = (unsigned long)p - (unsigned long)ctxt->sc_xprt_buf;
svc_rdma_sync_reply_hdr(xprt, ctxt, length);
ctxt->sc_send_wr.num_sge = 1;
ctxt->sc_send_wr.opcode = IB_WR_SEND;
ctxt->sc_sges[0].length = ctxt->sc_hdrbuf.len;
ret = svc_rdma_send(xprt, &ctxt->sc_send_wr);
if (ret)
svc_rdma_send_ctxt_put(xprt, ctxt);
goto put_ctxt;
return;
put_ctxt:
svc_rdma_send_ctxt_put(xprt, ctxt);
}
/* By convention, backchannel calls arrive via rdma_msg type
@ -785,7 +849,7 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_next_page = rqstp->rq_respages;
p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
ret = svc_rdma_xdr_decode_req(&rqstp->rq_arg);
ret = svc_rdma_xdr_decode_req(&rqstp->rq_arg, ctxt);
if (ret < 0)
goto out_err;
if (ret == 0)

57
net/sunrpc/xprtrdma/svc_rdma_rw.c
View File

@ -41,7 +41,7 @@ struct svc_rdma_rw_ctxt {
struct rdma_rw_ctx rw_ctx;
int rw_nents;
struct sg_table rw_sg_table;
struct scatterlist rw_first_sgl[0];
struct scatterlist rw_first_sgl[];
};
static inline struct svc_rdma_rw_ctxt *
@ -439,7 +439,8 @@ svc_rdma_build_writes(struct svc_rdma_write_info *info,
if (ret < 0)
goto out_initerr;
trace_svcrdma_encode_wseg(seg_handle, write_len, seg_offset);
trace_svcrdma_send_wseg(seg_handle, write_len, seg_offset);
list_add(&ctxt->rw_list, &cc->cc_rwctxts);
cc->cc_sqecount += ret;
if (write_len == seg_length - info->wi_seg_off) {
@ -482,18 +483,19 @@ static int svc_rdma_send_xdr_kvec(struct svc_rdma_write_info *info,
vec->iov_len);
}
/* Send an xdr_buf's page list by itself. A Write chunk is
* just the page list. a Reply chunk is the head, page list,
* and tail. This function is shared between the two types
* of chunk.
/* Send an xdr_buf's page list by itself. A Write chunk is just
* the page list. A Reply chunk is @xdr's head, page list, and
* tail. This function is shared between the two types of chunk.
*/
static int svc_rdma_send_xdr_pagelist(struct svc_rdma_write_info *info,
struct xdr_buf *xdr)
struct xdr_buf *xdr,
unsigned int offset,
unsigned long length)
{
info->wi_xdr = xdr;
info->wi_next_off = 0;
info->wi_next_off = offset - xdr->head[0].iov_len;
return svc_rdma_build_writes(info, svc_rdma_pagelist_to_sg,
xdr->page_len);
length);
}
/**
@ -501,6 +503,8 @@ static int svc_rdma_send_xdr_pagelist(struct svc_rdma_write_info *info,
* @rdma: controlling RDMA transport
* @wr_ch: Write chunk provided by client
* @xdr: xdr_buf containing the data payload
* @offset: payload's byte offset in @xdr
* @length: size of payload, in bytes
*
* Returns a non-negative number of bytes the chunk consumed, or
* %-E2BIG if the payload was larger than the Write chunk,
@ -510,19 +514,20 @@ static int svc_rdma_send_xdr_pagelist(struct svc_rdma_write_info *info,
* %-EIO if rdma_rw initialization failed (DMA mapping, etc).
*/
int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, __be32 *wr_ch,
struct xdr_buf *xdr)
struct xdr_buf *xdr,
unsigned int offset, unsigned long length)
{
struct svc_rdma_write_info *info;
int ret;
if (!xdr->page_len)
if (!length)
return 0;
info = svc_rdma_write_info_alloc(rdma, wr_ch);
if (!info)
return -ENOMEM;
ret = svc_rdma_send_xdr_pagelist(info, xdr);
ret = svc_rdma_send_xdr_pagelist(info, xdr, offset, length);
if (ret < 0)
goto out_err;
@ -530,8 +535,8 @@ int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, __be32 *wr_ch,
if (ret < 0)
goto out_err;
trace_svcrdma_encode_write(xdr->page_len);
return xdr->page_len;
trace_svcrdma_send_write_chunk(xdr->page_len);
return length;
out_err:
svc_rdma_write_info_free(info);
@ -541,8 +546,7 @@ out_err:
/**
* svc_rdma_send_reply_chunk - Write all segments in the Reply chunk
* @rdma: controlling RDMA transport
* @rp_ch: Reply chunk provided by client
* @writelist: true if client provided a Write list
* @rctxt: Write and Reply chunks from client
* @xdr: xdr_buf containing an RPC Reply
*
* Returns a non-negative number of bytes the chunk consumed, or
@ -552,13 +556,14 @@ out_err:
* %-ENOTCONN if posting failed (connection is lost),
* %-EIO if rdma_rw initialization failed (DMA mapping, etc).
*/
int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, __be32 *rp_ch,
bool writelist, struct xdr_buf *xdr)
int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr)
{
struct svc_rdma_write_info *info;
int consumed, ret;
info = svc_rdma_write_info_alloc(rdma, rp_ch);
info = svc_rdma_write_info_alloc(rdma, rctxt->rc_reply_chunk);
if (!info)
return -ENOMEM;
@ -570,8 +575,10 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, __be32 *rp_ch,
/* Send the page list in the Reply chunk only if the
* client did not provide Write chunks.
*/
if (!writelist && xdr->page_len) {
ret = svc_rdma_send_xdr_pagelist(info, xdr);
if (!rctxt->rc_write_list && xdr->page_len) {
ret = svc_rdma_send_xdr_pagelist(info, xdr,
xdr->head[0].iov_len,
xdr->page_len);
if (ret < 0)
goto out_err;
consumed += xdr->page_len;
@ -588,7 +595,7 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, __be32 *rp_ch,
if (ret < 0)
goto out_err;
trace_svcrdma_encode_reply(consumed);
trace_svcrdma_send_reply_chunk(consumed);
return consumed;
out_err:
@ -691,7 +698,7 @@ static int svc_rdma_build_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
break;
trace_svcrdma_encode_rseg(rs_handle, rs_length, rs_offset);
trace_svcrdma_send_rseg(rs_handle, rs_length, rs_offset);
info->ri_chunklen += rs_length;
}
@ -722,7 +729,7 @@ static int svc_rdma_build_normal_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
goto out;
trace_svcrdma_encode_read(info->ri_chunklen, info->ri_position);
trace_svcrdma_send_read_chunk(info->ri_chunklen, info->ri_position);
head->rc_hdr_count = 0;
@ -778,7 +785,7 @@ static int svc_rdma_build_pz_read_chunk(struct svc_rqst *rqstp,
if (ret < 0)
goto out;
trace_svcrdma_encode_pzr(info->ri_chunklen);
trace_svcrdma_send_pzr(info->ri_chunklen);
head->rc_arg.len += info->ri_chunklen;
head->rc_arg.buflen += info->ri_chunklen;

528
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@ -151,6 +151,8 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
ctxt->sc_send_wr.send_flags = IB_SEND_SIGNALED;
ctxt->sc_cqe.done = svc_rdma_wc_send;
ctxt->sc_xprt_buf = buffer;
xdr_buf_init(&ctxt->sc_hdrbuf, ctxt->sc_xprt_buf,
rdma->sc_max_req_size);
ctxt->sc_sges[0].addr = addr;
for (i = 0; i < rdma->sc_max_send_sges; i++)
@ -204,6 +206,10 @@ struct svc_rdma_send_ctxt *svc_rdma_send_ctxt_get(struct svcxprt_rdma *rdma)
spin_unlock(&rdma->sc_send_lock);
out:
rpcrdma_set_xdrlen(&ctxt->sc_hdrbuf, 0);
xdr_init_encode(&ctxt->sc_stream, &ctxt->sc_hdrbuf,
ctxt->sc_xprt_buf, NULL);
ctxt->sc_send_wr.num_sge = 0;
ctxt->sc_cur_sge_no = 0;
ctxt->sc_page_count = 0;
@ -295,6 +301,12 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr)
might_sleep();
/* Sync the transport header buffer */
ib_dma_sync_single_for_device(rdma->sc_pd->device,
wr->sg_list[0].addr,
wr->sg_list[0].length,
DMA_TO_DEVICE);
/* If the SQ is full, wait until an SQ entry is available */
while (1) {
if ((atomic_dec_return(&rdma->sc_sq_avail) < 0)) {
@ -322,166 +334,173 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr)
return ret;
}
static u32 xdr_padsize(u32 len)
{
return (len & 3) ? (4 - (len & 3)) : 0;
}
/* Returns length of transport header, in bytes.
*/
static unsigned int svc_rdma_reply_hdr_len(__be32 *rdma_resp)
{
unsigned int nsegs;
__be32 *p;
p = rdma_resp;
/* RPC-over-RDMA V1 replies never have a Read list. */
p += rpcrdma_fixed_maxsz + 1;
/* Skip Write list. */
while (*p++ != xdr_zero) {
nsegs = be32_to_cpup(p++);
p += nsegs * rpcrdma_segment_maxsz;
}
/* Skip Reply chunk. */
if (*p++ != xdr_zero) {
nsegs = be32_to_cpup(p++);
p += nsegs * rpcrdma_segment_maxsz;
}
return (unsigned long)p - (unsigned long)rdma_resp;
}
/* One Write chunk is copied from Call transport header to Reply
* transport header. Each segment's length field is updated to
* reflect number of bytes consumed in the segment.
/**
* svc_rdma_encode_read_list - Encode RPC Reply's Read chunk list
* @sctxt: Send context for the RPC Reply
*
* Returns number of segments in this chunk.
* Return values:
* On success, returns length in bytes of the Reply XDR buffer
* that was consumed by the Reply Read list
* %-EMSGSIZE on XDR buffer overflow
*/
static unsigned int xdr_encode_write_chunk(__be32 *dst, __be32 *src,
static ssize_t svc_rdma_encode_read_list(struct svc_rdma_send_ctxt *sctxt)
{
/* RPC-over-RDMA version 1 replies never have a Read list. */
return xdr_stream_encode_item_absent(&sctxt->sc_stream);
}
/**
* svc_rdma_encode_write_segment - Encode one Write segment
* @src: matching Write chunk in the RPC Call header
* @sctxt: Send context for the RPC Reply
* @remaining: remaining bytes of the payload left in the Write chunk
*
* Return values:
* On success, returns length in bytes of the Reply XDR buffer
* that was consumed by the Write segment
* %-EMSGSIZE on XDR buffer overflow
*/
static ssize_t svc_rdma_encode_write_segment(__be32 *src,
struct svc_rdma_send_ctxt *sctxt,
unsigned int *remaining)
{
__be32 *p;
const size_t len = rpcrdma_segment_maxsz * sizeof(*p);
u32 handle, length;
u64 offset;
p = xdr_reserve_space(&sctxt->sc_stream, len);
if (!p)
return -EMSGSIZE;
handle = be32_to_cpup(src++);
length = be32_to_cpup(src++);
xdr_decode_hyper(src, &offset);
*p++ = cpu_to_be32(handle);
if (*remaining < length) {
/* segment only partly filled */
length = *remaining;
*remaining = 0;
} else {
/* entire segment was consumed */
*remaining -= length;
}
*p++ = cpu_to_be32(length);
xdr_encode_hyper(p, offset);
trace_svcrdma_encode_wseg(handle, length, offset);
return len;
}
/**
* svc_rdma_encode_write_chunk - Encode one Write chunk
* @src: matching Write chunk in the RPC Call header
* @sctxt: Send context for the RPC Reply
* @remaining: size in bytes of the payload in the Write chunk
*
* Copy a Write chunk from the Call transport header to the
* Reply transport header. Update each segment's length field
* to reflect the number of bytes written in that segment.
*
* Return values:
* On success, returns length in bytes of the Reply XDR buffer
* that was consumed by the Write chunk
* %-EMSGSIZE on XDR buffer overflow
*/
static ssize_t svc_rdma_encode_write_chunk(__be32 *src,
struct svc_rdma_send_ctxt *sctxt,
unsigned int remaining)
{
unsigned int i, nsegs;
u32 seg_len;
ssize_t len, ret;
/* Write list discriminator */
*dst++ = *src++;
len = 0;
trace_svcrdma_encode_write_chunk(remaining);
/* number of segments in this chunk */
nsegs = be32_to_cpup(src);
*dst++ = *src++;
src++;
ret = xdr_stream_encode_item_present(&sctxt->sc_stream);
if (ret < 0)
return -EMSGSIZE;
len += ret;
nsegs = be32_to_cpup(src++);
ret = xdr_stream_encode_u32(&sctxt->sc_stream, nsegs);
if (ret < 0)
return -EMSGSIZE;
len += ret;
for (i = nsegs; i; i--) {
/* segment's RDMA handle */
*dst++ = *src++;
/* bytes returned in this segment */
seg_len = be32_to_cpu(*src);
if (remaining >= seg_len) {
/* entire segment was consumed */
*dst = *src;
remaining -= seg_len;
} else {
/* segment only partly filled */
*dst = cpu_to_be32(remaining);
remaining = 0;
}
dst++; src++;
/* segment's RDMA offset */
*dst++ = *src++;
*dst++ = *src++;
ret = svc_rdma_encode_write_segment(src, sctxt, &remaining);
if (ret < 0)
return -EMSGSIZE;
src += rpcrdma_segment_maxsz;
len += ret;
}
return nsegs;
return len;
}
/* The client provided a Write list in the Call message. Fill in
* the segments in the first Write chunk in the Reply's transport
/**
* svc_rdma_encode_write_list - Encode RPC Reply's Write chunk list
* @rctxt: Reply context with information about the RPC Call
* @sctxt: Send context for the RPC Reply
* @length: size in bytes of the payload in the first Write chunk
*
* The client provides a Write chunk list in the Call message. Fill
* in the segments in the first Write chunk in the Reply's transport
* header with the number of bytes consumed in each segment.
* Remaining chunks are returned unused.
*
* Assumptions:
* - Client has provided only one Write chunk
*
* Return values:
* On success, returns length in bytes of the Reply XDR buffer
* that was consumed by the Reply's Write list
* %-EMSGSIZE on XDR buffer overflow
*/
static void svc_rdma_xdr_encode_write_list(__be32 *rdma_resp, __be32 *wr_ch,
unsigned int consumed)
static ssize_t
svc_rdma_encode_write_list(const struct svc_rdma_recv_ctxt *rctxt,
struct svc_rdma_send_ctxt *sctxt,
unsigned int length)
{
unsigned int nsegs;
__be32 *p, *q;
ssize_t len, ret;
/* RPC-over-RDMA V1 replies never have a Read list. */
p = rdma_resp + rpcrdma_fixed_maxsz + 1;
ret = svc_rdma_encode_write_chunk(rctxt->rc_write_list, sctxt, length);
if (ret < 0)
return ret;
len = ret;
q = wr_ch;
while (*q != xdr_zero) {
nsegs = xdr_encode_write_chunk(p, q, consumed);
q += 2 + nsegs * rpcrdma_segment_maxsz;
p += 2 + nsegs * rpcrdma_segment_maxsz;
consumed = 0;
}
/* Terminate the Write list */
ret = xdr_stream_encode_item_absent(&sctxt->sc_stream);
if (ret < 0)
return ret;
/* Terminate Write list */
*p++ = xdr_zero;
/* Reply chunk discriminator; may be replaced later */
*p = xdr_zero;
return len + ret;
}
/* The client provided a Reply chunk in the Call message. Fill in
* the segments in the Reply chunk in the Reply message with the
* number of bytes consumed in each segment.
/**
* svc_rdma_encode_reply_chunk - Encode RPC Reply's Reply chunk
* @rctxt: Reply context with information about the RPC Call
* @sctxt: Send context for the RPC Reply
* @length: size in bytes of the payload in the Reply chunk
*
* Assumptions:
* - Reply can always fit in the provided Reply chunk
* - Reply can always fit in the client-provided Reply chunk
*
* Return values:
* On success, returns length in bytes of the Reply XDR buffer
* that was consumed by the Reply's Reply chunk
* %-EMSGSIZE on XDR buffer overflow
*/
static void svc_rdma_xdr_encode_reply_chunk(__be32 *rdma_resp, __be32 *rp_ch,
unsigned int consumed)
static ssize_t
svc_rdma_encode_reply_chunk(const struct svc_rdma_recv_ctxt *rctxt,
struct svc_rdma_send_ctxt *sctxt,
unsigned int length)
{
__be32 *p;
/* Find the Reply chunk in the Reply's xprt header.
* RPC-over-RDMA V1 replies never have a Read list.
*/
p = rdma_resp + rpcrdma_fixed_maxsz + 1;
/* Skip past Write list */
while (*p++ != xdr_zero)
p += 1 + be32_to_cpup(p) * rpcrdma_segment_maxsz;
xdr_encode_write_chunk(p, rp_ch, consumed);
}
/* Parse the RPC Call's transport header.
*/
static void svc_rdma_get_write_arrays(__be32 *rdma_argp,
__be32 **write, __be32 **reply)
{
__be32 *p;
p = rdma_argp + rpcrdma_fixed_maxsz;
/* Read list */
while (*p++ != xdr_zero)
p += 5;
/* Write list */
if (*p != xdr_zero) {
*write = p;
while (*p++ != xdr_zero)
p += 1 + be32_to_cpu(*p) * 4;
} else {
*write = NULL;
p++;
}
/* Reply chunk */
if (*p != xdr_zero)
*reply = p;
else
*reply = NULL;
return svc_rdma_encode_write_chunk(rctxt->rc_reply_chunk, sctxt,
length);
}
static int svc_rdma_dma_map_page(struct svcxprt_rdma *rdma,
@ -520,38 +539,36 @@ static int svc_rdma_dma_map_buf(struct svcxprt_rdma *rdma,
}
/**
* svc_rdma_sync_reply_hdr - DMA sync the transport header buffer
* svc_rdma_pull_up_needed - Determine whether to use pull-up
* @rdma: controlling transport
* @ctxt: send_ctxt for the Send WR
* @len: length of transport header
* @sctxt: send_ctxt for the Send WR
* @rctxt: Write and Reply chunks provided by client
* @xdr: xdr_buf containing RPC message to transmit
*
*/
void svc_rdma_sync_reply_hdr(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
unsigned int len)
{
ctxt->sc_sges[0].length = len;
ctxt->sc_send_wr.num_sge++;
ib_dma_sync_single_for_device(rdma->sc_pd->device,
ctxt->sc_sges[0].addr, len,
DMA_TO_DEVICE);
}
/* If the xdr_buf has more elements than the device can
* transmit in a single RDMA Send, then the reply will
* have to be copied into a bounce buffer.
* Returns:
* %true if pull-up must be used
* %false otherwise
*/
static bool svc_rdma_pull_up_needed(struct svcxprt_rdma *rdma,
struct xdr_buf *xdr,
__be32 *wr_lst)
struct svc_rdma_send_ctxt *sctxt,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr)
{
int elements;
/* For small messages, copying bytes is cheaper than DMA mapping.
*/
if (sctxt->sc_hdrbuf.len + xdr->len < RPCRDMA_PULLUP_THRESH)
return true;
/* Check whether the xdr_buf has more elements than can
* fit in a single RDMA Send.
*/
/* xdr->head */
elements = 1;
/* xdr->pages */
if (!wr_lst) {
if (!rctxt || !rctxt->rc_write_list) {
unsigned int remaining;
unsigned long pageoff;
@ -573,29 +590,36 @@ static bool svc_rdma_pull_up_needed(struct svcxprt_rdma *rdma,
return elements >= rdma->sc_max_send_sges;
}
/* The device is not capable of sending the reply directly.
* Assemble the elements of @xdr into the transport header
* buffer.
/**
* svc_rdma_pull_up_reply_msg - Copy Reply into a single buffer
* @rdma: controlling transport
* @sctxt: send_ctxt for the Send WR; xprt hdr is already prepared
* @rctxt: Write and Reply chunks provided by client
* @xdr: prepared xdr_buf containing RPC message
*
* The device is not capable of sending the reply directly.
* Assemble the elements of @xdr into the transport header buffer.
*
* Returns zero on success, or a negative errno on failure.
*/
static int svc_rdma_pull_up_reply_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
struct xdr_buf *xdr, __be32 *wr_lst)
struct svc_rdma_send_ctxt *sctxt,
const struct svc_rdma_recv_ctxt *rctxt,
const struct xdr_buf *xdr)
{
unsigned char *dst, *tailbase;
unsigned int taillen;
dst = ctxt->sc_xprt_buf;
dst += ctxt->sc_sges[0].length;
dst = sctxt->sc_xprt_buf + sctxt->sc_hdrbuf.len;
memcpy(dst, xdr->head[0].iov_base, xdr->head[0].iov_len);
dst += xdr->head[0].iov_len;
tailbase = xdr->tail[0].iov_base;
taillen = xdr->tail[0].iov_len;
if (wr_lst) {
if (rctxt && rctxt->rc_write_list) {
u32 xdrpad;
xdrpad = xdr_padsize(xdr->page_len);
xdrpad = xdr_pad_size(xdr->page_len);
if (taillen && xdrpad) {
tailbase += xdrpad;
taillen -= xdrpad;
@ -621,29 +645,26 @@ static int svc_rdma_pull_up_reply_msg(struct svcxprt_rdma *rdma,
if (taillen)
memcpy(dst, tailbase, taillen);
ctxt->sc_sges[0].length += xdr->len;
ib_dma_sync_single_for_device(rdma->sc_pd->device,
ctxt->sc_sges[0].addr,
ctxt->sc_sges[0].length,
DMA_TO_DEVICE);
sctxt->sc_sges[0].length += xdr->len;
trace_svcrdma_send_pullup(sctxt->sc_sges[0].length);
return 0;
}
/* svc_rdma_map_reply_msg - Map the buffer holding RPC message
/* svc_rdma_map_reply_msg - DMA map the buffer holding RPC message
* @rdma: controlling transport
* @ctxt: send_ctxt for the Send WR
* @sctxt: send_ctxt for the Send WR
* @rctxt: Write and Reply chunks provided by client
* @xdr: prepared xdr_buf containing RPC message
* @wr_lst: pointer to Call header's Write list, or NULL
*
* Load the xdr_buf into the ctxt's sge array, and DMA map each
* element as it is added.
* element as it is added. The Send WR's num_sge field is set.
*
* Returns zero on success, or a negative errno on failure.
*/
int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
struct xdr_buf *xdr, __be32 *wr_lst)
struct svc_rdma_send_ctxt *sctxt,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr)
{
unsigned int len, remaining;
unsigned long page_off;
@ -652,11 +673,24 @@ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
u32 xdr_pad;
int ret;
if (svc_rdma_pull_up_needed(rdma, xdr, wr_lst))
return svc_rdma_pull_up_reply_msg(rdma, ctxt, xdr, wr_lst);
/* Set up the (persistently-mapped) transport header SGE. */
sctxt->sc_send_wr.num_sge = 1;
sctxt->sc_sges[0].length = sctxt->sc_hdrbuf.len;
++ctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_buf(rdma, ctxt,
/* If there is a Reply chunk, nothing follows the transport
* header, and we're done here.
*/
if (rctxt && rctxt->rc_reply_chunk)
return 0;
/* For pull-up, svc_rdma_send() will sync the transport header.
* No additional DMA mapping is necessary.
*/
if (svc_rdma_pull_up_needed(rdma, sctxt, rctxt, xdr))
return svc_rdma_pull_up_reply_msg(rdma, sctxt, rctxt, xdr);
++sctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_buf(rdma, sctxt,
xdr->head[0].iov_base,
xdr->head[0].iov_len);
if (ret < 0)
@ -667,10 +701,10 @@ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
* have added XDR padding in the tail buffer, and that
* should not be included inline.
*/
if (wr_lst) {
if (rctxt && rctxt->rc_write_list) {
base = xdr->tail[0].iov_base;
len = xdr->tail[0].iov_len;
xdr_pad = xdr_padsize(xdr->page_len);
xdr_pad = xdr_pad_size(xdr->page_len);
if (len && xdr_pad) {
base += xdr_pad;
@ -686,8 +720,8 @@ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
while (remaining) {
len = min_t(u32, PAGE_SIZE - page_off, remaining);
++ctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_page(rdma, ctxt, *ppages++,
++sctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_page(rdma, sctxt, *ppages++,
page_off, len);
if (ret < 0)
return ret;
@ -700,8 +734,8 @@ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
len = xdr->tail[0].iov_len;
tail:
if (len) {
++ctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_buf(rdma, ctxt, base, len);
++sctxt->sc_cur_sge_no;
ret = svc_rdma_dma_map_buf(rdma, sctxt, base, len);
if (ret < 0)
return ret;
}
@ -748,18 +782,14 @@ static void svc_rdma_save_io_pages(struct svc_rqst *rqstp,
*/
static int svc_rdma_send_reply_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *sctxt,
struct svc_rdma_recv_ctxt *rctxt,
struct svc_rqst *rqstp,
__be32 *wr_lst, __be32 *rp_ch)
const struct svc_rdma_recv_ctxt *rctxt,
struct svc_rqst *rqstp)
{
int ret;
if (!rp_ch) {
ret = svc_rdma_map_reply_msg(rdma, sctxt,
&rqstp->rq_res, wr_lst);
if (ret < 0)
return ret;
}
ret = svc_rdma_map_reply_msg(rdma, sctxt, rctxt, &rqstp->rq_res);
if (ret < 0)
return ret;
svc_rdma_save_io_pages(rqstp, sctxt);
@ -769,8 +799,6 @@ static int svc_rdma_send_reply_msg(struct svcxprt_rdma *rdma,
} else {
sctxt->sc_send_wr.opcode = IB_WR_SEND;
}
dprintk("svcrdma: posting Send WR with %u sge(s)\n",
sctxt->sc_send_wr.num_sge);
return svc_rdma_send(rdma, &sctxt->sc_send_wr);
}
@ -785,26 +813,31 @@ static int svc_rdma_send_error_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt,
struct svc_rqst *rqstp)
{
struct svc_rdma_recv_ctxt *rctxt = rqstp->rq_xprt_ctxt;
__be32 *rdma_argp = rctxt->rc_recv_buf;
__be32 *p;
int ret;
p = ctxt->sc_xprt_buf;
trace_svcrdma_err_chunk(*p);
p += 3;
rpcrdma_set_xdrlen(&ctxt->sc_hdrbuf, 0);
xdr_init_encode(&ctxt->sc_stream, &ctxt->sc_hdrbuf, ctxt->sc_xprt_buf,
NULL);
p = xdr_reserve_space(&ctxt->sc_stream, RPCRDMA_HDRLEN_ERR);
if (!p)
return -ENOMSG;
*p++ = *rdma_argp;
*p++ = *(rdma_argp + 1);
*p++ = rdma->sc_fc_credits;
*p++ = rdma_error;
*p = err_chunk;
svc_rdma_sync_reply_hdr(rdma, ctxt, RPCRDMA_HDRLEN_ERR);
trace_svcrdma_err_chunk(*rdma_argp);
svc_rdma_save_io_pages(rqstp, ctxt);
ctxt->sc_send_wr.num_sge = 1;
ctxt->sc_send_wr.opcode = IB_WR_SEND;
ret = svc_rdma_send(rdma, &ctxt->sc_send_wr);
if (ret) {
svc_rdma_send_ctxt_put(rdma, ctxt);
return ret;
}
return 0;
ctxt->sc_sges[0].length = ctxt->sc_hdrbuf.len;
return svc_rdma_send(rdma, &ctxt->sc_send_wr);
}
/**
@ -825,14 +858,14 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
struct svcxprt_rdma *rdma =
container_of(xprt, struct svcxprt_rdma, sc_xprt);
struct svc_rdma_recv_ctxt *rctxt = rqstp->rq_xprt_ctxt;
__be32 *p, *rdma_argp, *rdma_resp, *wr_lst, *rp_ch;
__be32 *rdma_argp = rctxt->rc_recv_buf;
__be32 *wr_lst = rctxt->rc_write_list;
__be32 *rp_ch = rctxt->rc_reply_chunk;
struct xdr_buf *xdr = &rqstp->rq_res;
struct svc_rdma_send_ctxt *sctxt;
__be32 *p;
int ret;
rdma_argp = rctxt->rc_recv_buf;
svc_rdma_get_write_arrays(rdma_argp, &wr_lst, &rp_ch);
/* Create the RDMA response header. xprt->xpt_mutex,
* acquired in svc_send(), serializes RPC replies. The
* code path below that inserts the credit grant value
@ -843,36 +876,52 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
sctxt = svc_rdma_send_ctxt_get(rdma);
if (!sctxt)
goto err0;
rdma_resp = sctxt->sc_xprt_buf;
p = rdma_resp;
p = xdr_reserve_space(&sctxt->sc_stream,
rpcrdma_fixed_maxsz * sizeof(*p));
if (!p)
goto err0;
*p++ = *rdma_argp;
*p++ = *(rdma_argp + 1);
*p++ = rdma->sc_fc_credits;
*p++ = rp_ch ? rdma_nomsg : rdma_msg;
/* Start with empty chunks */
*p++ = xdr_zero;
*p++ = xdr_zero;
*p = xdr_zero;
*p = rp_ch ? rdma_nomsg : rdma_msg;
if (svc_rdma_encode_read_list(sctxt) < 0)
goto err0;
if (wr_lst) {
/* XXX: Presume the client sent only one Write chunk */
ret = svc_rdma_send_write_chunk(rdma, wr_lst, xdr);
unsigned long offset;
unsigned int length;
if (rctxt->rc_read_payload_length) {
offset = rctxt->rc_read_payload_offset;
length = rctxt->rc_read_payload_length;
} else {
offset = xdr->head[0].iov_len;
length = xdr->page_len;
}
ret = svc_rdma_send_write_chunk(rdma, wr_lst, xdr, offset,
length);
if (ret < 0)
goto err2;
svc_rdma_xdr_encode_write_list(rdma_resp, wr_lst, ret);
if (svc_rdma_encode_write_list(rctxt, sctxt, length) < 0)
goto err0;
} else {
if (xdr_stream_encode_item_absent(&sctxt->sc_stream) < 0)
goto err0;
}
if (rp_ch) {
ret = svc_rdma_send_reply_chunk(rdma, rp_ch, wr_lst, xdr);
ret = svc_rdma_send_reply_chunk(rdma, rctxt, &rqstp->rq_res);
if (ret < 0)
goto err2;
svc_rdma_xdr_encode_reply_chunk(rdma_resp, rp_ch, ret);
if (svc_rdma_encode_reply_chunk(rctxt, sctxt, ret) < 0)
goto err0;
} else {
if (xdr_stream_encode_item_absent(&sctxt->sc_stream) < 0)
goto err0;
}
svc_rdma_sync_reply_hdr(rdma, sctxt, svc_rdma_reply_hdr_len(rdma_resp));
ret = svc_rdma_send_reply_msg(rdma, sctxt, rctxt, rqstp,
wr_lst, rp_ch);
ret = svc_rdma_send_reply_msg(rdma, sctxt, rctxt, rqstp);
if (ret < 0)
goto err1;
ret = 0;
@ -900,3 +949,30 @@ out:
ret = -ENOTCONN;
goto out;
}
/**
* svc_rdma_read_payload - special processing for a READ payload
* @rqstp: svc_rqst to operate on
* @offset: payload's byte offset in @xdr
* @length: size of payload, in bytes
*
* Returns zero on success.
*
* For the moment, just record the xdr_buf location of the READ
* payload. svc_rdma_sendto will use that location later when
* we actually send the payload.
*/
int svc_rdma_read_payload(struct svc_rqst *rqstp, unsigned int offset,
unsigned int length)
{
struct svc_rdma_recv_ctxt *rctxt = rqstp->rq_xprt_ctxt;
/* XXX: Just one READ payload slot for now, since our
* transport implementation currently supports only one
* Write chunk.
*/
rctxt->rc_read_payload_offset = offset;
rctxt->rc_read_payload_length = length;
return 0;
}

8
net/sunrpc/xprtrdma/svc_rdma_transport.c
View File

@ -82,6 +82,7 @@ static const struct svc_xprt_ops svc_rdma_ops = {
.xpo_create = svc_rdma_create,
.xpo_recvfrom = svc_rdma_recvfrom,
.xpo_sendto = svc_rdma_sendto,
.xpo_read_payload = svc_rdma_read_payload,
.xpo_release_rqst = svc_rdma_release_rqst,
.xpo_detach = svc_rdma_detach,
.xpo_free = svc_rdma_free,
@ -240,10 +241,6 @@ static void handle_connect_req(struct rdma_cm_id *new_cma_id,
static int rdma_listen_handler(struct rdma_cm_id *cma_id,
struct rdma_cm_event *event)
{
struct sockaddr *sap = (struct sockaddr *)&cma_id->route.addr.src_addr;
trace_svcrdma_cm_event(event, sap);
switch (event->event) {
case RDMA_CM_EVENT_CONNECT_REQUEST:
dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, "
@ -265,12 +262,9 @@ static int rdma_listen_handler(struct rdma_cm_id *cma_id,
static int rdma_cma_handler(struct rdma_cm_id *cma_id,
struct rdma_cm_event *event)
{
struct sockaddr *sap = (struct sockaddr *)&cma_id->route.addr.dst_addr;
struct svcxprt_rdma *rdma = cma_id->context;
struct svc_xprt *xprt = &rdma->sc_xprt;
trace_svcrdma_cm_event(event, sap);
switch (event->event) {
case RDMA_CM_EVENT_ESTABLISHED:
/* Accept complete */

188
net/sunrpc/xprtsock.c
View File

@ -54,6 +54,7 @@
#include <trace/events/sunrpc.h>
#include "socklib.h"
#include "sunrpc.h"
static void xs_close(struct rpc_xprt *xprt);
@ -749,125 +750,6 @@ xs_stream_start_connect(struct sock_xprt *transport)
#define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL)
static int xs_sendmsg(struct socket *sock, struct msghdr *msg, size_t seek)
{
if (seek)
iov_iter_advance(&msg->msg_iter, seek);
return sock_sendmsg(sock, msg);
}
static int xs_send_kvec(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t seek)
{
iov_iter_kvec(&msg->msg_iter, WRITE, vec, 1, vec->iov_len);
return xs_sendmsg(sock, msg, seek);
}
static int xs_send_pagedata(struct socket *sock, struct msghdr *msg, struct xdr_buf *xdr, size_t base)
{
int err;
err = xdr_alloc_bvec(xdr, GFP_KERNEL);
if (err < 0)
return err;
iov_iter_bvec(&msg->msg_iter, WRITE, xdr->bvec,
xdr_buf_pagecount(xdr),
xdr->page_len + xdr->page_base);
return xs_sendmsg(sock, msg, base + xdr->page_base);
}
#define xs_record_marker_len() sizeof(rpc_fraghdr)
/* Common case:
* - stream transport
* - sending from byte 0 of the message
* - the message is wholly contained in @xdr's head iovec
*/
static int xs_send_rm_and_kvec(struct socket *sock, struct msghdr *msg,
rpc_fraghdr marker, struct kvec *vec, size_t base)
{
struct kvec iov[2] = {
[0] = {
.iov_base = &marker,
.iov_len = sizeof(marker)
},
[1] = *vec,
};
size_t len = iov[0].iov_len + iov[1].iov_len;
iov_iter_kvec(&msg->msg_iter, WRITE, iov, 2, len);
return xs_sendmsg(sock, msg, base);
}
/**
* xs_sendpages - write pages directly to a socket
* @sock: socket to send on
* @addr: UDP only -- address of destination
* @addrlen: UDP only -- length of destination address
* @xdr: buffer containing this request
* @base: starting position in the buffer
* @rm: stream record marker field
* @sent_p: return the total number of bytes successfully queued for sending
*
*/
static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, rpc_fraghdr rm, int *sent_p)
{
struct msghdr msg = {
.msg_name = addr,
.msg_namelen = addrlen,
.msg_flags = XS_SENDMSG_FLAGS | MSG_MORE,
};
unsigned int rmsize = rm ? sizeof(rm) : 0;
unsigned int remainder = rmsize + xdr->len - base;
unsigned int want;
int err = 0;
if (unlikely(!sock))
return -ENOTSOCK;
want = xdr->head[0].iov_len + rmsize;
if (base < want) {
unsigned int len = want - base;
remainder -= len;
if (remainder == 0)
msg.msg_flags &= ~MSG_MORE;
if (rmsize)
err = xs_send_rm_and_kvec(sock, &msg, rm,
&xdr->head[0], base);
else
err = xs_send_kvec(sock, &msg, &xdr->head[0], base);
if (remainder == 0 || err != len)
goto out;
*sent_p += err;
base = 0;
} else
base -= want;
if (base < xdr->page_len) {
unsigned int len = xdr->page_len - base;
remainder -= len;
if (remainder == 0)
msg.msg_flags &= ~MSG_MORE;
err = xs_send_pagedata(sock, &msg, xdr, base);
if (remainder == 0 || err != len)
goto out;
*sent_p += err;
base = 0;
} else
base -= xdr->page_len;
if (base >= xdr->tail[0].iov_len)
return 0;
msg.msg_flags &= ~MSG_MORE;
err = xs_send_kvec(sock, &msg, &xdr->tail[0], base);
out:
if (err > 0) {
*sent_p += err;
err = 0;
}
return err;
}
/**
* xs_nospace - handle transmit was incomplete
* @req: pointer to RPC request
@ -959,8 +841,11 @@ static int xs_local_send_request(struct rpc_rqst *req)
struct xdr_buf *xdr = &req->rq_snd_buf;
rpc_fraghdr rm = xs_stream_record_marker(xdr);
unsigned int msglen = rm ? req->rq_slen + sizeof(rm) : req->rq_slen;
struct msghdr msg = {
.msg_flags = XS_SENDMSG_FLAGS,
};
unsigned int uninitialized_var(sent);
int status;
int sent = 0;
/* Close the stream if the previous transmission was incomplete */
if (xs_send_request_was_aborted(transport, req)) {
@ -972,8 +857,8 @@ static int xs_local_send_request(struct rpc_rqst *req)
req->rq_svec->iov_base, req->rq_svec->iov_len);
req->rq_xtime = ktime_get();
status = xs_sendpages(transport->sock, NULL, 0, xdr,
transport->xmit.offset, rm, &sent);
status = xprt_sock_sendmsg(transport->sock, &msg, xdr,
transport->xmit.offset, rm, &sent);
dprintk("RPC: %s(%u) = %d\n",
__func__, xdr->len - transport->xmit.offset, status);
@ -1025,7 +910,12 @@ static int xs_udp_send_request(struct rpc_rqst *req)
struct rpc_xprt *xprt = req->rq_xprt;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct xdr_buf *xdr = &req->rq_snd_buf;
int sent = 0;
struct msghdr msg = {
.msg_name = xs_addr(xprt),
.msg_namelen = xprt->addrlen,
.msg_flags = XS_SENDMSG_FLAGS,
};
unsigned int uninitialized_var(sent);
int status;
xs_pktdump("packet data:",
@ -1039,8 +929,7 @@ static int xs_udp_send_request(struct rpc_rqst *req)
return -EBADSLT;
req->rq_xtime = ktime_get();
status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen,
xdr, 0, 0, &sent);
status = xprt_sock_sendmsg(transport->sock, &msg, xdr, 0, 0, &sent);
dprintk("RPC: xs_udp_send_request(%u) = %d\n",
xdr->len, status);
@ -1106,9 +995,12 @@ static int xs_tcp_send_request(struct rpc_rqst *req)
struct xdr_buf *xdr = &req->rq_snd_buf;
rpc_fraghdr rm = xs_stream_record_marker(xdr);
unsigned int msglen = rm ? req->rq_slen + sizeof(rm) : req->rq_slen;
struct msghdr msg = {
.msg_flags = XS_SENDMSG_FLAGS,
};
bool vm_wait = false;
unsigned int uninitialized_var(sent);
int status;
int sent;
/* Close the stream if the previous transmission was incomplete */
if (xs_send_request_was_aborted(transport, req)) {
@ -1129,9 +1021,8 @@ static int xs_tcp_send_request(struct rpc_rqst *req)
* called sendmsg(). */
req->rq_xtime = ktime_get();
while (1) {
sent = 0;
status = xs_sendpages(transport->sock, NULL, 0, xdr,
transport->xmit.offset, rm, &sent);
status = xprt_sock_sendmsg(transport->sock, &msg, xdr,
transport->xmit.offset, rm, &sent);
dprintk("RPC: xs_tcp_send_request(%u) = %d\n",
xdr->len - transport->xmit.offset, status);
@ -2636,46 +2527,25 @@ static void bc_free(struct rpc_task *task)
free_page((unsigned long)buf);
}
/*
* Use the svc_sock to send the callback. Must be called with svsk->sk_mutex
* held. Borrows heavily from svc_tcp_sendto and xs_tcp_send_request.
*/
static int bc_sendto(struct rpc_rqst *req)
{
int len;
struct xdr_buf *xbufp = &req->rq_snd_buf;
struct xdr_buf *xdr = &req->rq_snd_buf;
struct sock_xprt *transport =
container_of(req->rq_xprt, struct sock_xprt, xprt);
unsigned long headoff;
unsigned long tailoff;
struct page *tailpage;
struct msghdr msg = {
.msg_flags = MSG_MORE
.msg_flags = 0,
};
rpc_fraghdr marker = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT |
(u32)xbufp->len);
struct kvec iov = {
.iov_base = &marker,
.iov_len = sizeof(marker),
};
(u32)xdr->len);
unsigned int sent = 0;
int err;
req->rq_xtime = ktime_get();
len = kernel_sendmsg(transport->sock, &msg, &iov, 1, iov.iov_len);
if (len != iov.iov_len)
err = xprt_sock_sendmsg(transport->sock, &msg, xdr, 0, marker, &sent);
xdr_free_bvec(xdr);
if (err < 0 || sent != (xdr->len + sizeof(marker)))
return -EAGAIN;
tailpage = NULL;
if (xbufp->tail[0].iov_len)
tailpage = virt_to_page(xbufp->tail[0].iov_base);
tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK;
headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK;
len = svc_send_common(transport->sock, xbufp,
virt_to_page(xbufp->head[0].iov_base), headoff,
tailpage, tailoff);
if (len != xbufp->len)
return -EAGAIN;
return len;
return sent;
}
/*