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linux/fs/ocfs2
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Gang He 9673e0050c ocfs2: ocfs2_downconvert_lock failure results in deadlock 
Usually, ocfs2_downconvert_lock() function always downconverts dlm lock to
the expected level for satisfy dlm bast requests from the other nodes.

But there is a rare situation.  When dlm lock conversion is being
canceled, ocfs2_downconvert_lock() function will return -EBUSY.  You need
to be aware that ocfs2_cancel_convert() function is asynchronous in fsdlm
implementation.

If we does not requeue this lockres entry, ocfs2 downconvert thread no
longer handles this dlm lock bast request.  Then, the other nodes will not
get the dlm lock again, the current node's process will be blocked when
acquire this dlm lock again.

Link: https://lkml.kernel.org/r/20210830044621.12544-1-ghe@suse.com
Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-09-03 09:58:09 -07:00
..
cluster ocfs2: remove redundant initialization of variable ret 2021-06-29 10:53:46 -07:00
dlm ocfs2: remove redundant assignment to pointer queue 2021-06-29 10:53:46 -07:00
dlmfs treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
acl.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
acl.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
alloc.c ext4: add discard/zeroout flags to journal flush 2021-06-22 19:27:10 -04:00
alloc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
aops.c mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
aops.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
blockcheck.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
blockcheck.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
buffer_head_io.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
buffer_head_io.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dcache.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dcache.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dir.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dir.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
dlmglue.c ocfs2: ocfs2_downconvert_lock failure results in deadlock 2021-09-03 09:58:09 -07:00
dlmglue.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
export.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
export.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
extent_map.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
extent_map.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
file.c ocfs2: issue zeroout to EOF blocks 2021-07-30 10:14:39 -07:00
file.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
filecheck.c ocfs2: fix snprintf() checking 2021-06-29 10:53:46 -07:00
filecheck.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
heartbeat.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
heartbeat.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
inode.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
inode.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ioctl.c ocfs2: convert to fileattr 2021-04-12 15:04:30 +02:00
ioctl.h ocfs2: convert to fileattr 2021-04-12 15:04:30 +02:00
journal.c ext4: add discard/zeroout flags to journal flush 2021-06-22 19:27:10 -04:00
journal.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
Kconfig ocfs2: replace HTTP links with HTTPS ones 2020-08-07 11:33:22 -07:00
localalloc.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
localalloc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
locks.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
locks.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
Makefile
mmap.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
mmap.h
move_extents.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
move_extents.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
namei.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
namei.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs1_fs_compat.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_fs.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_ioctl.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_lockid.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_lockingver.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
ocfs2_trace.h
ocfs2.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
quota_global.c ocfs2: quota_local: fix possible uninitialized-variable access in ocfs2_local_read_info() 2021-09-03 09:58:09 -07:00
quota_local.c ocfs2: quota_local: fix possible uninitialized-variable access in ocfs2_local_read_info() 2021-09-03 09:58:09 -07:00
quota.h
refcounttree.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
refcounttree.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
reservations.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
reservations.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
resize.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
resize.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
slot_map.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
slot_map.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stack_o2cb.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stack_user.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
stackglue.c ocfs2: fix snprintf() checking 2021-06-29 10:53:46 -07:00
stackglue.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
suballoc.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
suballoc.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
super.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
super.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
symlink.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
symlink.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
sysfile.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
sysfile.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
uptodate.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
uptodate.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
xattr.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
xattr.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00