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NFSv4: Schedule recovery if nfs40_walk_client_list() is interrupted 

If a timeout or a signal interrupts the NFSv4 trunking discovery
SETCLIENTID_CONFIRM call, then we don't know whether or not the
server has changed the callback identifier on us.
Assume that it did, and schedule a 'path down' recovery...

Tested-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2014-03-18 14:11:24 -04:00
parent 706cb8db3b
commit f9b7ebdf7e
1 changed files with 7 additions and 0 deletions
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7
fs/nfs/nfs4client.c
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@ -531,6 +531,13 @@ int nfs40_walk_client_list(struct nfs_client *new,
*result = pos;
dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
__func__, pos, atomic_read(&pos->cl_count));
goto out;
case -ERESTARTSYS:
case -ETIMEDOUT:
/* The callback path may have been inadvertently
* changed. Schedule recovery!
*/
nfs4_schedule_path_down_recovery(pos);
default:
goto out;
}