From: Xiubo Li <xiubli@xxxxxxxxxx>
When truncating the inode the MDS will acquire the xlock for the
ifile Locker, which will revoke the 'Frwsxl' caps from the clients.
But when the client just releases and flushes the 'Fw' caps to MDS,
for exmaple, and once the MDS receives the caps flushing msg it
just thought the revocation has finished. Then the MDS will continue
truncating the inode and then issued the truncate notification to
all the clients. While just before the clients receives the cap
flushing ack they receive the truncation notification, the clients
will detecte that the 'issued | dirty' is still holding the 'Fw'
caps.
Fixes: b0d7c2231015 ("ceph: introduce i_truncate_mutex")
Cc: stable@xxxxxxxxxxxxxxx
URL: https://tracker.ceph.com/issues/56693
Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
---
V2:
- Added the info about which commit it's fixing
fs/ceph/inode.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index ea6f966dacd5..8017b9e5864f 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -769,9 +769,7 @@ int ceph_fill_file_size(struct inode *inode, int issued,
ci->i_truncate_seq = truncate_seq;
/* the MDS should have revoked these caps */
- WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
- CEPH_CAP_FILE_RD |
- CEPH_CAP_FILE_WR |
+ WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD |
CEPH_CAP_FILE_LAZYIO));
/*
* If we hold relevant caps, or in the case where we're
--
2.41.0
