linux-stable/fs/lockd
NeilBrown f4578ba11c lockd: hold a reference to nlmsvc_serv while stopping the thread.
Both nfsd and nfsv4-callback take a temporary reference to the svc_serv
while calling svc_set_num_threads() to stop the last thread.  lockd does
not.

This extra reference prevents the scv_serv from being freed when the
last thread drops its reference count.  This is not currently needed
for lockd as the svc_serv is not accessed after the last thread is told
to exit.

However a future patch will require svc_exit_thread() to access the
svc_serv after the svc_put() so it will need the code that calls
svc_set_num_threads() to keep a reference and keep the svc_serv active.

So copy the pattern from nfsd and nfsv4-cb to lockd, and take a
reference around svc_set_num_threads(.., 0)

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Tested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:04 -04:00
..
clnt4xdr.c lockd: set file_lock start and end when decoding nlm4 testargs 2023-03-14 14:00:55 -04:00
clntlock.c NFS: add a sysfs link to the lockd rpc_client 2023-06-19 15:06:07 -04:00
clntproc.c lockd: add some client-side tracepoints 2023-04-26 09:05:00 -04:00
clntxdr.c NFS: Remove print_overflow_msg() 2019-02-13 11:53:45 -05:00
host.c lockd: purge resources held on behalf of nlm clients when shutting down 2023-04-26 09:04:59 -04:00
Makefile lockd: add some client-side tracepoints 2023-04-26 09:05:00 -04:00
mon.c fs: lockd: avoid possible wrong NULL parameter 2023-08-29 17:45:22 -04:00
netns.h filelock: move file locking definitions to separate header file 2023-01-11 06:52:32 -05:00
procfs.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
procfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
svc.c lockd: hold a reference to nlmsvc_serv while stopping the thread. 2023-10-16 12:44:04 -04:00
svc4proc.c lockd: set missing fl_flags field when retrieving args 2022-12-10 11:01:11 -05:00
svclock.c lockd: fix race in async lock request handling 2023-10-16 12:44:02 -04:00
svcproc.c lockd: set missing fl_flags field when retrieving args 2022-12-10 11:01:11 -05:00
svcshare.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
svcsubs.c NFSD 6.2 Release Notes 2022-12-12 20:54:39 -08:00
svcxdr.h NLM: Fix svcxdr_encode_owner() 2021-09-17 10:35:10 -04:00
trace.c lockd: add some client-side tracepoints 2023-04-26 09:05:00 -04:00
trace.h lockd: add some client-side tracepoints 2023-04-26 09:05:00 -04:00
xdr.c SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.c lockd: set file_lock start and end when decoding nlm4 testargs 2023-03-14 14:00:55 -04:00