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 <[email protected]>
Cc: Ilya Dryomov <[email protected]>
Cc: "Yan, Zheng" <[email protected]>
Cc: Sage Weil <[email protected]>
---
 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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