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[PATCH 01/10] ceph: honor AT_STATX_DONT_SYNC

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  [PATCH 01/10] ceph: honor AT_STATX_DONT_SYNC Miklos Szeredi <mszeredi@redhat.com> - 2017-09-20 10:50 +0200

#1735638 — [PATCH 01/10] ceph: 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@redhat.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: "Yan, Zheng" <zyan@redhat.com>
Cc: Sage Weil <sage@redhat.com>
---
 fs/ceph/inode.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 373dab5173ca..723002f6b060 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2201,9 +2201,11 @@ int ceph_getattr(const struct path *path, struct kstat *stat,
 {
 	struct inode *inode = d_inode(path->dentry);
 	struct ceph_inode_info *ci = ceph_inode(inode);
-	int err;
+	int err = 0;
+
+	if (!(flags & AT_STATX_DONT_SYNC))
+		err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
 
-	err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
 	if (!err) {
 		generic_fillattr(inode, stat);
 		stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
-- 
2.5.5

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