ceph: don't include used caps in cap_wanted
when copying files to cephfs, file data may stay in page cache after
corresponding file is closed. Cached data use Fc capability. If we
include Fc capability in cap_wanted, MDS will treat files with cached
data as open files, and journal them in an EOpen event when trimming
log segment.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 245ca38..a80a899 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1525,13 +1525,13 @@
retry_locked:
file_wanted = __ceph_caps_file_wanted(ci);
used = __ceph_caps_used(ci);
- want = file_wanted | used;
issued = __ceph_caps_issued(ci, &implemented);
revoking = implemented & ~issued;
- retain = want | CEPH_CAP_PIN;
+ want = file_wanted;
+ retain = file_wanted | used | CEPH_CAP_PIN;
if (!mdsc->stopping && inode->i_nlink > 0) {
- if (want) {
+ if (file_wanted) {
retain |= CEPH_CAP_ANY; /* be greedy */
} else if (S_ISDIR(inode->i_mode) &&
(issued & CEPH_CAP_FILE_SHARED) &&