From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Thu, 22 Sep 2016 17:39:18 +0000 (-0400)
Subject: NFSv4: Open state recovery must account for file permission changes
X-Git-Tag: firefly_0821_release~176^2~4^2~22^2~49
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2c52c33a25f508bc8ba80d666339cf2f44ece3ad;p=firefly-linux-kernel-4.4.55.git

NFSv4: Open state recovery must account for file permission changes

commit 304020fe48c6c7fff8b5a38f382b54404f0f79d3 upstream.

If the file permissions change on the server, then we may not be able to
recover open state. If so, we need to ensure that we mark the file
descriptor appropriately.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Tested-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index d854693a15b0..82dc3035ea45 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1493,6 +1493,9 @@ restart:
 					__func__, status);
 			case -ENOENT:
 			case -ENOMEM:
+			case -EACCES:
+			case -EROFS:
+			case -EIO:
 			case -ESTALE:
 				/* Open state on this file cannot be recovered */
 				nfs4_state_mark_recovery_failed(state, status);