GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-23 15:11:16 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

NFSv4: Fix NFSv4 trunking discovery

Browse source 
If walking the list in nfs4[01]_walk_client_list fails, then the most
likely explanation is that the server dropped the clientid before we
actually managed to confirm it. As long as our nfs_client is the very
last one in the list to be tested, the caller can be assured that this
is the case when the final return value is NFS4ERR_STALE_CLIENTID.

Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org [>=3.7]
Tested-by: Ben Greear <greearb@candelatech.com>
This commit is contained in:
Trond Myklebust 2013-01-18 22:56:23 -05:00
parent 4ae19c2dd7
commit 202c312dba
2 changed files with 9 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

26
fs/nfs/nfs4client.c
View file

@ -352,14 +352,8 @@ int nfs40_walk_client_list(struct nfs_client *new,
}
spin_unlock(&nn->nfs_client_lock);
/* No match found. The server lost our clientid */
out:
/*
* No matching nfs_client found. This should be impossible,
* because the new nfs_client has already been added to
* nfs_client_list by nfs_get_client().
*
* Don't BUG(), since the caller is holding a mutex.
*/
if (prev)
nfs_put_client(prev);
dprintk("NFS: <-- %s status = %d\n", __func__, status);
@ -430,7 +424,7 @@ int nfs41_walk_client_list(struct nfs_client *new,
{
struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
struct nfs_client *pos, *n, *prev = NULL;
int error;
int status = -NFS4ERR_STALE_CLIENTID;
spin_lock(&nn->nfs_client_lock);
list_for_each_entry_safe(pos, n, &nn->nfs_client_list, cl_share_link) {
@ -446,8 +440,8 @@ int nfs41_walk_client_list(struct nfs_client *new,
nfs_put_client(prev);
prev = pos;
error = nfs_wait_client_init_complete(pos);
if (error < 0) {
status = nfs_wait_client_init_complete(pos);
if (status < 0) {
nfs_put_client(pos);
spin_lock(&nn->nfs_client_lock);
continue;
@ -480,16 +474,10 @@ int nfs41_walk_client_list(struct nfs_client *new,
return 0;
}
/*
* No matching nfs_client found. This should be impossible,
* because the new nfs_client has already been added to
* nfs_client_list by nfs_get_client().
*
* Don't BUG(), since the caller is holding a mutex.
*/
/* No matching nfs_client found. */
spin_unlock(&nn->nfs_client_lock);
pr_err("NFS: %s Error: no matching nfs_client found\n", __func__);
return -NFS4ERR_STALE_CLIENTID;
dprintk("NFS: <-- %s status = %d\n", __func__, status);
return status;
}
#endif /* CONFIG_NFS_V4_1 */