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Diffstat (limited to 'fs/lockd/svc.c')
-rw-r--r--fs/lockd/svc.c117
1 files changed, 48 insertions, 69 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 2169af4d545..c631a83931c 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -50,8 +50,7 @@ EXPORT_SYMBOL(nlmsvc_ops);
static DEFINE_MUTEX(nlmsvc_mutex);
static unsigned int nlmsvc_users;
static struct task_struct *nlmsvc_task;
-static struct svc_serv *nlmsvc_serv;
-int nlmsvc_grace_period;
+static struct svc_rqst *nlmsvc_rqst;
unsigned long nlmsvc_timeout;
/*
@@ -85,27 +84,23 @@ static unsigned long get_lockd_grace_period(void)
return nlm_timeout * 5 * HZ;
}
-unsigned long get_nfs_grace_period(void)
-{
- unsigned long lockdgrace = get_lockd_grace_period();
- unsigned long nfsdgrace = 0;
-
- if (nlmsvc_ops)
- nfsdgrace = nlmsvc_ops->get_grace_period();
-
- return max(lockdgrace, nfsdgrace);
-}
-EXPORT_SYMBOL(get_nfs_grace_period);
+static struct lock_manager lockd_manager = {
+};
-static unsigned long set_grace_period(void)
+static void grace_ender(struct work_struct *not_used)
{
- nlmsvc_grace_period = 1;
- return get_nfs_grace_period() + jiffies;
+ locks_end_grace(&lockd_manager);
}
-static inline void clear_grace_period(void)
+static DECLARE_DELAYED_WORK(grace_period_end, grace_ender);
+
+static void set_grace_period(void)
{
- nlmsvc_grace_period = 0;
+ unsigned long grace_period = get_lockd_grace_period();
+
+ locks_start_grace(&lockd_manager);
+ cancel_delayed_work_sync(&grace_period_end);
+ schedule_delayed_work(&grace_period_end, grace_period);
}
/*
@@ -116,7 +111,6 @@ lockd(void *vrqstp)
{
int err = 0, preverr = 0;
struct svc_rqst *rqstp = vrqstp;
- unsigned long grace_period_expire;
/* try_to_freeze() is called from svc_recv() */
set_freezable();
@@ -139,7 +133,7 @@ lockd(void *vrqstp)
nlm_timeout = LOCKD_DFLT_TIMEO;
nlmsvc_timeout = nlm_timeout * HZ;
- grace_period_expire = set_grace_period();
+ set_grace_period();
/*
* The main request loop. We don't terminate until the last
@@ -153,21 +147,12 @@ lockd(void *vrqstp)
flush_signals(current);
if (nlmsvc_ops) {
nlmsvc_invalidate_all();
- grace_period_expire = set_grace_period();
+ set_grace_period();
}
continue;
}
- /*
- * Retry any blocked locks that have been notified by
- * the VFS. Don't do this during grace period.
- * (Theoretically, there shouldn't even be blocked locks
- * during grace period).
- */
- if (!nlmsvc_grace_period) {
- timeout = nlmsvc_retry_blocked();
- } else if (time_before(grace_period_expire, jiffies))
- clear_grace_period();
+ timeout = nlmsvc_retry_blocked();
/*
* Find a socket with data available and call its
@@ -194,43 +179,38 @@ lockd(void *vrqstp)
svc_process(rqstp);
}
-
flush_signals(current);
+ cancel_delayed_work_sync(&grace_period_end);
if (nlmsvc_ops)
nlmsvc_invalidate_all();
nlm_shutdown_hosts();
-
unlock_kernel();
-
- nlmsvc_task = NULL;
- nlmsvc_serv = NULL;
-
- /* Exit the RPC thread */
- svc_exit_thread(rqstp);
-
return 0;
}
/*
- * Make any sockets that are needed but not present.
- * If nlm_udpport or nlm_tcpport were set as module
- * options, make those sockets unconditionally
+ * Ensure there are active UDP and TCP listeners for lockd.
+ *
+ * Even if we have only TCP NFS mounts and/or TCP NFSDs, some
+ * local services (such as rpc.statd) still require UDP, and
+ * some NFS servers do not yet support NLM over TCP.
+ *
+ * Returns zero if all listeners are available; otherwise a
+ * negative errno value is returned.
*/
-static int make_socks(struct svc_serv *serv, int proto)
+static int make_socks(struct svc_serv *serv)
{
static int warned;
struct svc_xprt *xprt;
int err = 0;
- if (proto == IPPROTO_UDP || nlm_udpport) {
- xprt = svc_find_xprt(serv, "udp", 0, 0);
- if (!xprt)
- err = svc_create_xprt(serv, "udp", nlm_udpport,
- SVC_SOCK_DEFAULTS);
- else
- svc_xprt_put(xprt);
- }
- if (err >= 0 && (proto == IPPROTO_TCP || nlm_tcpport)) {
+ xprt = svc_find_xprt(serv, "udp", 0, 0);
+ if (!xprt)
+ err = svc_create_xprt(serv, "udp", nlm_udpport,
+ SVC_SOCK_DEFAULTS);
+ else
+ svc_xprt_put(xprt);
+ if (err >= 0) {
xprt = svc_find_xprt(serv, "tcp", 0, 0);
if (!xprt)
err = svc_create_xprt(serv, "tcp", nlm_tcpport,
@@ -250,22 +230,17 @@ static int make_socks(struct svc_serv *serv, int proto)
/*
* Bring up the lockd process if it's not already up.
*/
-int
-lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
+int lockd_up(void)
{
struct svc_serv *serv;
- struct svc_rqst *rqstp;
int error = 0;
mutex_lock(&nlmsvc_mutex);
/*
* Check whether we're already up and running.
*/
- if (nlmsvc_serv) {
- if (proto)
- error = make_socks(nlmsvc_serv, proto);
+ if (nlmsvc_rqst)
goto out;
- }
/*
* Sanity check: if there's no pid,
@@ -276,21 +251,23 @@ lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
"lockd_up: no pid, %d users??\n", nlmsvc_users);
error = -ENOMEM;
- serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
+ serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, AF_INET, NULL);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
goto out;
}
- if ((error = make_socks(serv, proto)) < 0)
+ error = make_socks(serv);
+ if (error < 0)
goto destroy_and_out;
/*
* Create the kernel thread and wait for it to start.
*/
- rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
- if (IS_ERR(rqstp)) {
- error = PTR_ERR(rqstp);
+ nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0]);
+ if (IS_ERR(nlmsvc_rqst)) {
+ error = PTR_ERR(nlmsvc_rqst);
+ nlmsvc_rqst = NULL;
printk(KERN_WARNING
"lockd_up: svc_rqst allocation failed, error=%d\n",
error);
@@ -298,16 +275,15 @@ lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
}
svc_sock_update_bufs(serv);
- nlmsvc_serv = rqstp->rq_server;
- nlmsvc_task = kthread_run(lockd, rqstp, serv->sv_name);
+ nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
error = PTR_ERR(nlmsvc_task);
+ svc_exit_thread(nlmsvc_rqst);
nlmsvc_task = NULL;
- nlmsvc_serv = NULL;
+ nlmsvc_rqst = NULL;
printk(KERN_WARNING
"lockd_up: kthread_run failed, error=%d\n", error);
- svc_exit_thread(rqstp);
goto destroy_and_out;
}
@@ -346,6 +322,9 @@ lockd_down(void)
BUG();
}
kthread_stop(nlmsvc_task);
+ svc_exit_thread(nlmsvc_rqst);
+ nlmsvc_task = NULL;
+ nlmsvc_rqst = NULL;
out:
mutex_unlock(&nlmsvc_mutex);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 14:22:49 +0000