ceph: fix update of ctime from MDS

The client can have a newer ctime than the MDS due to AUTH_EXCL and
XATTR_EXCL caps as well; update the check in ceph_fill_file_time
appropriately.

This fixes cases where ctime/mtime goes backward under the right sequence
of local updates (e.g. chmod) and mds replies (e.g. subsequent stat that
goes to the MDS).

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 425c5b1f944e..7bc0fbd26af2 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -471,7 +471,9 @@ void ceph_fill_file_time(struct inode *inode, int issued,
 
         if (issued & (CEPH_CAP_FILE_EXCL|
                       CEPH_CAP_FILE_WR|
-                      CEPH_CAP_FILE_BUFFER)) {
+                      CEPH_CAP_FILE_BUFFER|
+                      CEPH_CAP_AUTH_EXCL|
+                      CEPH_CAP_XATTR_EXCL)) {
                 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
                         dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
                              inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
@@ -511,7 +513,7 @@ void ceph_fill_file_time(struct inode *inode, int issued,
                         warn = 1;
                 }
         } else {
-                /* we have no write caps; whatever the MDS says is true */
+                /* we have no write|excl caps; whatever the MDS says is true */
                 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
                         inode->i_ctime = *ctime;
                         inode->i_mtime = *mtime;