From aaae3f00d3f67f681a1f3cb7af999e976e8a24ce Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Thu, 20 Aug 2015 18:56:07 -0500
Subject: NFSv4: Force a post-op attribute update when holding a delegation
If the ctime or mtime or change attribute have changed because
of an operation we initiated, we should make sure that we force
an attribute update. However we do not want to mark the page cache
for revalidation.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.0+
---
fs/nfs/inode.c | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'fs/nfs/inode.c')
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 2744d48bbbfe..e2cc0031decb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1477,6 +1477,13 @@ static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr
{
unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
+ /*
+ * Don't revalidate the pagecache if we hold a delegation, but do
+ * force an attribute update
+ */
+ if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
+ invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_FORCED;
+
if (S_ISDIR(inode->i_mode))
invalid |= NFS_INO_INVALID_DATA;
nfs_set_cache_invalid(inode, invalid);
--
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