ceph: don't request excl caps when mount is readonly
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index a58666a..e7af6479 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1855,14 +1855,17 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
retain |= CEPH_CAP_ANY; /* be greedy */
} else if (S_ISDIR(inode->i_mode) &&
(issued & CEPH_CAP_FILE_SHARED) &&
- __ceph_dir_is_complete(ci)) {
+ __ceph_dir_is_complete(ci)) {
/*
* If a directory is complete, we want to keep
* the exclusive cap. So that MDS does not end up
* revoking the shared cap on every create/unlink
* operation.
*/
- want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
+ if (IS_RDONLY(inode))
+ want = CEPH_CAP_ANY_SHARED;
+ else
+ want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
retain |= want;
} else {