linux-kernel - [PATCH 05/10] gfs2: honor AT_STATX_DONT

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Message-Id: <1505896805-12055-6-git-send-email-mszeredi@redhat.com>
Date:   Wed, 20 Sep 2017 10:40:00 +0200
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>,
        Bob Peterson <rpeterso@...hat.com>,
        Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 05/10] gfs2: honor AT_STATX_DONT_SYNC

The description of this flag says "Don't sync attributes with the server".
In other words: always use the attributes cached in the kernel and don't
send network or local messages to refresh the attributes.

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Cc: Bob Peterson <rpeterso@...hat.com>
Cc: Steven Whitehouse <swhiteho@...hat.com>
---
 fs/gfs2/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 863749e29bf9..c59d36a3b724 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1989,7 +1989,8 @@ static int gfs2_getattr(const struct path *path, struct kstat *stat,
 	int error;
 
 	gfs2_holder_mark_uninitialized(&gh);
-	if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
+	if (!(flags & AT_STATX_DONT_SYNC) &&
+	    gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
 		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
 		if (error)
 			return error;
-- 
2.5.5