Andreas Gruenbacher 82e938bd53 gfs2: Upgrade shared glocks for atime updates
Commit 20f829999c38 ("gfs2: Rework read and page fault locking") lifted
the glock lock taking from the low-level ->readpage and ->readahead
address space operations to the higher-level ->read_iter file and
->fault vm operations.  The glocks are still taken in LM_ST_SHARED mode
only.  On filesystems mounted without the noatime option, ->read_iter
sometimes needs to update the atime as well, though.  Right now, this
leads to a failed locking mode assertion in gfs2_dirty_inode.

Fix that by introducing a new update_time inode operation.  There, if
the glock is held non-exclusively, upgrade it to an exclusive lock.

Reported-by: Alexander Aring <aahringo@redhat.com>
Fixes: 20f829999c38 ("gfs2: Rework read and page fault locking")
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2020-11-26 19:58:25 +01:00
..
2020-10-16 11:11:22 -07:00
2020-11-10 10:07:15 -08:00
2020-10-19 14:28:30 -07:00
2020-11-19 22:38:29 -05:00
2020-09-21 08:59:26 -07:00
2020-11-14 11:26:04 -08:00
2020-11-20 11:47:22 -08:00
\n
2020-10-15 14:56:15 -07:00
2020-10-01 11:15:31 +02:00
2020-09-10 14:03:31 -07:00
2020-10-05 10:38:33 -06:00
2020-10-19 14:28:30 -07:00
\n
2020-10-15 15:03:10 -07:00
2020-10-16 12:21:15 -07:00
2020-10-13 12:12:44 -07:00
2020-08-04 21:02:38 -04:00
2020-10-16 11:11:15 -07:00
2020-09-22 23:45:57 -04:00
2020-11-20 11:47:22 -08:00
2020-07-31 08:16:01 +02:00
2020-08-07 11:33:24 -07:00
2020-10-23 11:33:41 -07:00
2020-05-14 16:44:24 +02:00
2020-08-12 10:58:01 -07:00
2020-10-23 11:33:41 -07:00
2020-07-31 08:16:00 +02:00
2020-11-06 10:05:18 -08:00
2020-10-24 12:40:18 -07:00
2020-09-26 22:55:05 -04:00
2020-08-27 16:06:47 -04:00
2020-06-09 15:40:50 -07:00
2020-07-31 08:16:01 +02:00