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Subject[PATCH 4.2 089/134] Revert "NFSv4: Remove incorrect check in can_open_delegated()"
Date
4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Trond Myklebust <trond.myklebust@primarydata.com>

commit 36319608e28701c07cad80ae3be8b0fdfb1ab40f upstream.

This reverts commit 4e379d36c050b0117b5d10048be63a44f5036115.

This commit opens up a race between the recovery code and the open code.

Reported-by: Olga Kornievskaia <aglo@umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/nfs/nfs4proc.c | 2 ++
1 file changed, 2 insertions(+)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1156,6 +1156,8 @@ static int can_open_delegated(struct nfs
return 0;
if ((delegation->type & fmode) != fmode)
return 0;
+ if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
+ return 0;
if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
return 0;
nfs_mark_delegation_referenced(delegation);



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