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ceph: check all mds' caps after page writeback

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If an inode has caps from multiple mds's, the following can happen:

- non-auth mds revokes Fsc. Fcb is used, so page writeback is queued.
- when writeback finishes, ceph_check_caps() is called with auth only
  flag. ceph_check_caps() invalidates pagecache, but skips checking any
  non-auth caps.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2020-03-05 20:21:04 +08:00 committed by Ilya Dryomov
parent 11ba6b9cee
commit bf73c62e7f
2 changed files with 2 additions and 2 deletions
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2
fs/ceph/caps.c
View File

@ -3062,7 +3062,7 @@ void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
spin_unlock(&ci->i_ceph_lock);
if (last) {
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
ceph_check_caps(ci, 0, NULL);
} else if (flush_snaps) {
ceph_flush_snaps(ci, NULL);
}

2
fs/ceph/inode.c
View File

@ -1984,7 +1984,7 @@ retry:
mutex_unlock(&ci->i_truncate_mutex);
if (wrbuffer_refs == 0)
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
ceph_check_caps(ci, 0, NULL);
wake_up_all(&ci->i_cap_wq);
}