Alexander Aring 1c675c937c dlm: fix plock lookup when using multiple lockspaces ... commit 7c53e847ff upstream. All posix lock ops, for all lockspaces (gfs2 file systems) are sent to userspace (dlm_controld) through a single misc device. The dlm_controld daemon reads the ops from the misc device and sends them to other cluster nodes using separate, per-lockspace cluster api communication channels. The ops for a single lockspace are ordered at this level, so that the results are received in the same sequence that the requests were sent. When the results are sent back to the kernel via the misc device, they are again funneled through the single misc device for all lockspaces. When the dlm code in the kernel processes the results from the misc device, these results will be returned in the same sequence that the requests were sent, on a per-lockspace basis. A recent change in this request/reply matching code missed the "per-lockspace" check (fsid comparison) when matching request and reply, so replies could be incorrectly matched to requests from other lockspaces. Cc: stable@vger.kernel.org Reported-by: Barry Marson <bmarson@redhat.com> Fixes: 57e2c2f2d9 ("fs: dlm: fix mismatch of plock results from userspace") Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-09-23 10:59:55 +02:00
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Kconfig	…
Makefile	…
ast.c	fs: dlm: fix race between test_bit() and queue_work()	2022-10-26 13:22:14 +02:00
ast.h	…
config.c	fs: dlm: fix memory leak when fenced	2021-07-14 16:53:17 +02:00
config.h	…
debug_fs.c	fs: dlm: fix debugfs dump	2021-05-19 10:08:20 +02:00
dir.c	…
dir.h	…
dlm_internal.h	dlm: remove BUG() before panic()	2020-06-24 17:50:26 +02:00
lock.c	dlm: replace usage of found with dedicated list iterator variable	2023-08-30 16:27:20 +02:00
lock.h	…
lockspace.c	dlm: Fix kobject memleak	2020-08-19 08:16:21 +02:00
lockspace.h	…
lowcomms.c	fs: dlm: cancel work sync othercon	2021-07-14 16:53:17 +02:00
lowcomms.h	…
lvb_table.h	…
main.c	dlm: no need to check return value of debugfs_create functions	2019-07-11 11:01:58 -05:00
member.c	…
member.h	…
memory.c	…
memory.h	…
midcomms.c	…
midcomms.h	…
netlink.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
plock.c	dlm: fix plock lookup when using multiple lockspaces	2023-09-23 10:59:55 +02:00
rcom.c	…
rcom.h	…
recover.c	dlm: replace usage of found with dedicated list iterator variable	2023-08-30 16:27:20 +02:00
recover.h	…
recoverd.c	…
recoverd.h	…
requestqueue.c	…
requestqueue.h	…
user.c	…
user.h	…
util.c	…
util.h	…