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NFSv4.1: do not use deviceids after MDS clientid invalidation 

Mark all deviceids established under an expired MDS clientid as invalid.
Stop all new i/o through DS and send through the MDS.
Don't use any new LAYOUTGETs that use the invalid deviceid. Purge all layouts
established under the expired MDS clientid.
Remove the MDS clientid deviceid and data servers reference

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-06-15 17:52:40 -04:00 committed by Trond Myklebust
parent a56aaa02b1
commit c47abcf8ff
5 changed files with 47 additions and 0 deletions
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10
fs/nfs/nfs4filelayout.c
View File

@ -334,6 +334,9 @@ filelayout_read_pagelist(struct nfs_read_data *data)
__func__, data->inode->i_ino,
data->args.pgbase, (size_t)data->args.count, offset);
if (test_bit(NFS_DEVICEID_INVALID, &FILELAYOUT_DEVID_NODE(lseg)->flags))
return PNFS_NOT_ATTEMPTED;
/* Retrieve the correct rpc_client for the byte range */
j = nfs4_fl_calc_j_index(lseg, offset);
idx = nfs4_fl_calc_ds_index(lseg, j);
@ -373,6 +376,9 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
struct nfs_fh *fh;
int status;
if (test_bit(NFS_DEVICEID_INVALID, &FILELAYOUT_DEVID_NODE(lseg)->flags))
return PNFS_NOT_ATTEMPTED;
/* Retrieve the correct rpc_client for the byte range */
j = nfs4_fl_calc_j_index(lseg, offset);
idx = nfs4_fl_calc_ds_index(lseg, j);
@ -456,6 +462,10 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo,
goto out;
} else
dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node);
/* Found deviceid is being reaped */
if (test_bit(NFS_DEVICEID_INVALID, &dsaddr->id_node.flags))
goto out_put;
fl->dsaddr = dsaddr;
if (fl->first_stripe_index < 0 ||

6
fs/nfs/nfs4filelayout.h
View File

@ -96,6 +96,12 @@ FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
generic_hdr);
}
static inline struct nfs4_deviceid_node *
FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
{
return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
}
extern struct nfs_fh *
nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);

3
fs/nfs/pnfs.c
View File

@ -452,6 +452,9 @@ pnfs_destroy_all_layouts(struct nfs_client *clp)
struct pnfs_layout_hdr *lo;
LIST_HEAD(tmp_list);
nfs4_deviceid_mark_client_invalid(clp);
nfs4_deviceid_purge_client(clp);
spin_lock(&clp->cl_lock);
rcu_read_lock();
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {

8
fs/nfs/pnfs.h
View File

@ -192,12 +192,20 @@ struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
enum pnfs_iomode iomode,
gfp_t gfp_flags);
void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
/* nfs4_deviceid_flags */
enum {
NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
};
/* pnfs_dev.c */
struct nfs4_deviceid_node {
struct hlist_node node;
struct hlist_node tmpnode;
const struct pnfs_layoutdriver_type *ld;
const struct nfs_client *nfs_client;
unsigned long flags;
struct nfs4_deviceid deviceid;
atomic_t ref;
};

20
fs/nfs/pnfs_dev.c
View File

@ -156,6 +156,7 @@ nfs4_init_deviceid_node(struct nfs4_deviceid_node *d,
INIT_HLIST_NODE(&d->tmpnode);
d->ld = ld;
d->nfs_client = nfs_client;
d->flags = 0;
d->deviceid = *id;
atomic_set(&d->ref, 1);
}
@ -253,3 +254,22 @@ nfs4_deviceid_purge_client(const struct nfs_client *clp)
for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++)
_deviceid_purge_client(clp, h);
}
/*
* Stop use of all deviceids associated with an nfs_client
*/
void
nfs4_deviceid_mark_client_invalid(struct nfs_client *clp)
{
struct nfs4_deviceid_node *d;
struct hlist_node *n;
int i;
rcu_read_lock();
for (i = 0; i < NFS4_DEVICE_ID_HASH_SIZE; i ++){
hlist_for_each_entry_rcu(d, n, &nfs4_deviceid_cache[i], node)
if (d->nfs_client == clp)
set_bit(NFS_DEVICEID_INVALID, &d->flags);
}
rcu_read_unlock();
}