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authorTrond Myklebust <trond.myklebust@primarydata.com>2014-03-05 08:44:23 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-03-23 21:38:17 -0700
commitc8dd8fdf0bd8c858d30ba3889104e226e865cade (patch)
tree63ec25df247bc7579d0ee43c5e6cb05d313125d6 /fs
parent40cb674a5a0cff49a46af150fb862229e545e908 (diff)
downloadlinaro-lsk-c8dd8fdf0bd8c858d30ba3889104e226e865cade.tar.gz
NFSv4: nfs4_stateid_is_current should return 'true' for an invalid stateid
commit e1253be0ece1a95a02c7f5843194877471af8179 upstream. 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 Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
-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 26e71bdb5b3..1ae7dd5956c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3607,8 +3607,9 @@ 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);
}