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lockd: move svc_exit_thread() into the thread

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[ Upstream commit 6a4e2527a63620a820c4ebf3596b57176da26fb3 ]

The normal place to call svc_exit_thread() is from the thread itself
just before it exists.
Do this for lockd.

This means that nlmsvc_rqst is not used out side of lockd_start_svc(),
so it can be made local to that function, and renamed to 'rqst'.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
NeilBrown 2021-11-29 15:51:25 +11:00 committed by Greg Kroah-Hartman
parent 7077a00703
commit 8304dd04fb
1 changed files with 12 additions and 11 deletions
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23
fs/lockd/svc.c
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@ -56,7 +56,6 @@ static DEFINE_MUTEX(nlmsvc_mutex);
static unsigned int nlmsvc_users;
static struct svc_serv *nlmsvc_serv;
static struct task_struct *nlmsvc_task;
static struct svc_rqst *nlmsvc_rqst;
unsigned long nlmsvc_timeout;
unsigned int lockd_net_id;
@ -182,6 +181,11 @@ lockd(void *vrqstp)
nlm_shutdown_hosts();
cancel_delayed_work_sync(&ln->grace_period_end);
locks_end_grace(&ln->lockd_manager);
dprintk("lockd_down: service stopped\n");
svc_exit_thread(rqstp);
return 0;
}
@ -358,13 +362,14 @@ static void lockd_unregister_notifiers(void)
static int lockd_start_svc(struct svc_serv *serv)
{
int error;
struct svc_rqst *rqst;
/*
* Create the kernel thread and wait for it to start.
*/
nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
if (IS_ERR(nlmsvc_rqst)) {
error = PTR_ERR(nlmsvc_rqst);
rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
if (IS_ERR(rqst)) {
error = PTR_ERR(rqst);
printk(KERN_WARNING
"lockd_up: svc_rqst allocation failed, error=%d\n",
error);
@ -374,24 +379,23 @@ static int lockd_start_svc(struct svc_serv *serv)
svc_sock_update_bufs(serv);
serv->sv_maxconn = nlm_max_connections;
nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name);
nlmsvc_task = kthread_create(lockd, rqst, "%s", serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
error = PTR_ERR(nlmsvc_task);
printk(KERN_WARNING
"lockd_up: kthread_run failed, error=%d\n", error);
goto out_task;
}
nlmsvc_rqst->rq_task = nlmsvc_task;
rqst->rq_task = nlmsvc_task;
wake_up_process(nlmsvc_task);
dprintk("lockd_up: service started\n");
return 0;
out_task:
svc_exit_thread(nlmsvc_rqst);
svc_exit_thread(rqst);
nlmsvc_task = NULL;
out_rqst:
nlmsvc_rqst = NULL;
return error;
}
@ -500,9 +504,6 @@ lockd_down(struct net *net)
}
lockd_unregister_notifiers();
kthread_stop(nlmsvc_task);
dprintk("lockd_down: service stopped\n");
svc_exit_thread(nlmsvc_rqst);
nlmsvc_rqst = NULL;
dprintk("lockd_down: service destroyed\n");
nlmsvc_serv = NULL;
nlmsvc_task = NULL;