Patch "NFSv4: Force a post-op attribute update when holding a delegation" has been added to the 4.2-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    NFSv4: Force a post-op attribute update when holding a delegation

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nfsv4-force-a-post-op-attribute-update-when-holding-a-delegation.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>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

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

commit aaae3f00d3f67f681a1f3cb7af999e976e8a24ce upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/inode.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1483,6 +1483,13 @@ static int nfs_post_op_update_inode_lock
 {
 	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);


Patches currently in stable-queue which might be from trond.myklebust@primarydata.com are

queue-4.2/nfs41-flexfiles-zero-out-ds-write-wcc.patch
queue-4.2/nfs-nfs_set_pgio_error-sometimes-misses-errors.patch
queue-4.2/nfs-fix-a-null-pointer-dereference-of-migration-recovery-ops-for-v4.2-client.patch
queue-4.2/sunrpc-xs_reset_transport-must-mark-the-connection-as-disconnected.patch
queue-4.2/nfs-fix-truncated-client-owner-id-without-proto-type.patch
queue-4.2/nfs-don-t-let-the-ctime-override-attribute-barriers.patch
queue-4.2/sunrpc-fix-a-thinko-in-xs_connect.patch
queue-4.2/nfsv4-don-t-set-setattr-for-o_rdonly-o_excl.patch
queue-4.2/nfs41-flexfiles-update-inode-after-write-finishes.patch
queue-4.2/nfsv4.1-pnfs-fix-borken-function-_same_data_server_addrs_locked.patch
queue-4.2/nfsv4-force-a-post-op-attribute-update-when-holding-a-delegation.patch
queue-4.2/nfsv4.1-pnfs-fix-atomicity-of-commit-list-updates.patch
queue-4.2/nfsv4.1-flexfiles-fix-a-protocol-error-in-layoutreturn.patch
queue-4.2/revert-nfsv4-remove-incorrect-check-in-can_open_delegated.patch
queue-4.2/nfsv4.1-fix-a-protocol-issue-with-close-stateids.patch