linux-stable/fs/gfs2
Bob Peterson 20b3291290 gfs2: Fix regression in freeze_go_sync
Patch 541656d3a5 ("gfs2: freeze should work on read-only mounts") changed
the check for glock state in function freeze_go_sync() from "gl->gl_state
== LM_ST_SHARED" to "gl->gl_req == LM_ST_EXCLUSIVE".  That's wrong and it
regressed gfs2's freeze/thaw mechanism because it caused only the freezing
node (which requests the glock in EX) to queue freeze work.

All nodes go through this go_sync code path during the freeze to drop their
SHared hold on the freeze glock, allowing the freezing node to acquire it
in EXclusive mode. But all the nodes must freeze access to the file system
locally, so they ALL must queue freeze work. The freeze_work calls
freeze_func, which makes a request to reacquire the freeze glock in SH,
effectively blocking until the thaw from the EX holder. Once thawed, the
freezing node drops its EX hold on the freeze glock, then the (blocked)
freeze_func reacquires the freeze glock in SH again (on all nodes, including
the freezer) so all nodes go back to a thawed state.

This patch changes the check back to gl_state == LM_ST_SHARED like it was
prior to 541656d3a5.

Fixes: 541656d3a5 ("gfs2: freeze should work on read-only mounts")
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2020-11-18 16:28:11 +01:00
..
acl.c gfs2: Change inode qa_data to allow multiple users 2020-03-27 14:08:04 -05:00
acl.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
aops.c gfs2: Fix case in which ail writes are done to jdata holes 2020-11-12 18:55:20 +01:00
aops.h gfs2: mark stuffed_readpage static 2019-07-03 14:45:18 +02:00
bmap.c Revert "gfs2: Ignore journal log writes for jdata holes" 2020-11-12 18:41:57 +01:00
bmap.h gfs2: use iomap for buffered I/O in ordered and writeback mode 2020-10-14 23:54:42 +02:00
dentry.c gfs2: untangle the logic in gfs2_drevalidate 2019-09-03 09:42:41 +02:00
dir.c mm: remove the pgprot argument to __vmalloc 2020-06-02 10:59:11 -07:00
dir.h gfs2: Delete an unnecessary check before brelse() 2019-09-04 20:22:17 +02:00
export.c gfs2: Minor gfs2_lookup_by_inum cleanup 2020-06-05 20:19:21 +02:00
file.c Changes in gfs2: 2020-08-10 18:22:43 -07:00
gfs2.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
glock.c gfs2: Wake up when sd_glock_disposal becomes zero 2020-11-03 14:39:11 +01:00
glock.h Merge branch 'gfs2-iopen' into for-next 2020-06-05 21:25:36 +02:00
glops.c gfs2: Fix regression in freeze_go_sync 2020-11-18 16:28:11 +01:00
glops.h gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
incore.h gfs2: lookup local statfs inodes prior to journal recovery 2020-10-23 15:47:14 +02:00
inode.c gfs2: Don't call cancel_delayed_work_sync from within delete work function 2020-11-02 21:34:47 +01:00
inode.h gfs2: Minor gfs2_lookup_by_inum cleanup 2020-06-05 20:19:21 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lock_dlm.c gfs2: Force withdraw to replay journals and wait for it to finish 2020-02-27 07:53:12 -06:00
log.c gfs2: Fix case in which ail writes are done to jdata holes 2020-11-12 18:55:20 +01:00
log.h gfs2: Wipe jdata and ail1 in gfs2_journal_wipe, formerly gfs2_meta_wipe 2020-10-15 14:29:03 +02:00
lops.c gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
lops.h gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
main.c gfs2: eliminate GIF_ORDERED in favor of list_empty 2020-07-03 12:05:34 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
meta_io.c gfs2: Wipe jdata and ail1 in gfs2_journal_wipe, formerly gfs2_meta_wipe 2020-10-15 14:29:03 +02:00
meta_io.h gfs2: Wipe jdata and ail1 in gfs2_journal_wipe, formerly gfs2_meta_wipe 2020-10-15 14:29:03 +02:00
ops_fstype.c gfs2: don't initialize statfs_change inodes in spectator mode 2020-10-29 22:16:46 +01:00
quota.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
quota.h gfs2: move privileged user check to gfs2_quota_lock_check 2020-05-08 18:47:58 +02:00
recovery.c gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
recovery.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
rgrp.c gfs2: fix possible reference leak in gfs2_check_blk_type 2020-11-12 13:09:07 +01:00
rgrp.h gfs2: Fix NULL pointer dereference in gfs2_rgrp_dump 2020-10-14 23:54:43 +02:00
super.c gfs2: Add missing truncate_inode_pages_final for sd_aspace 2020-10-29 22:16:46 +01:00
super.h gfs2: lookup local statfs inodes prior to journal recovery 2020-10-23 15:47:14 +02:00
sys.c gfs2: use-after-free in sysfs deregistration 2020-10-14 23:54:43 +02:00
sys.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
trace_gfs2.h gfs2: eliminate GLF_QUEUED flag in favor of list_empty(gl_holders) 2020-10-15 17:04:53 +02:00
trans.c gfs2: add some much needed cleanup for log flushes that fail 2020-08-24 13:54:07 +02:00
trans.h gfs2: new slab for transactions 2020-06-05 21:24:25 +02:00
util.c gfs2: Fix NULL pointer dereference in gfs2_rgrp_dump 2020-10-14 23:54:43 +02:00
util.h gfs2: Make sure we don't miss any delayed withdraws 2020-10-14 23:54:41 +02:00
xattr.c gfs2: Change inode qa_data to allow multiple users 2020-03-27 14:08:04 -05:00
xattr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00