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authorTrond Myklebust <trond.myklebust@primarydata.com>2014-03-05 08:44:23 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-03-05 11:55:06 -0500
commite1253be0ece1a95a02c7f5843194877471af8179 (patch)
treed5f22de8fec53058a624f308df1375973c264c79 /fs/nfs
parent755a48a7a4eb05b9c8424e3017d947b2961a60e0 (diff)
NFSv4: nfs4_stateid_is_current should return 'true' for an invalid stateid
When nfs4_set_rw_stateid() can fails by returning EIO to indicate that the stateid is completely invalid, then it makes no sense to have it trigger a retry of the READ or WRITE operation. Instead, we should just have it fall through and attempt a recovery. This fixes an infinite loop in which the client keeps replaying the same bad stateid back to the server. Reported-by: Andy Adamson <andros@netapp.com> Link: http://lkml.kernel.org/r/1393954269-3974-1-git-send-email-andros@netapp.com Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 44e088dc357..4ae8141452c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4011,8 +4011,9 @@ static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
{
nfs4_stateid current_stateid;
- if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
- return false;
+ /* If the current stateid represents a lost lock, then exit */
+ if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
+ return true;
return nfs4_stateid_match(stateid, &current_stateid);
}