linux-kernel - [PATCH 08/10] ocfs2: honor AT_STATX_DONT

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Message-Id: <1505896805-12055-9-git-send-email-mszeredi@redhat.com>
Date:   Wed, 20 Sep 2017 10:40:03 +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>,
        Mark Fasheh <mfasheh@...sity.com>,
        Joel Becker <jlbec@...lplan.org>
Subject: [PATCH 08/10] ocfs2: 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: Mark Fasheh <mfasheh@...sity.com>
Cc: Joel Becker <jlbec@...lplan.org>
---
 fs/ocfs2/file.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 6e41fc8fabbe..2d248d71c275 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1307,11 +1307,13 @@ int ocfs2_getattr(const struct path *path, struct kstat *stat,
 	struct ocfs2_super *osb = sb->s_fs_info;
 	int err;
 
-	err = ocfs2_inode_revalidate(path->dentry);
-	if (err) {
-		if (err != -ENOENT)
-			mlog_errno(err);
-		goto bail;
+	if (!(flags & AT_STATX_DONT_SYNC)) {
+		err = ocfs2_inode_revalidate(path->dentry);
+		if (err) {
+			if (err != -ENOENT)
+				mlog_errno(err);
+			goto bail;
+		}
 	}
 
 	generic_fillattr(inode, stat);
-- 
2.5.5