Lockd: shutdown NLM hosts in network namespace context

Lockd now managed in network namespace context. And this patch introduces
network namespace related NLM hosts shutdown in case of releasing per-net Lockd
resources.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 9ebd91d..eb75ca7 100644 (file)
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -565,12 +565,8 @@ void nlm_host_rebooted(const struct nlm_reboot *info)
        nsm_release(nsm);
 }
 
-/*
- * Shut down the hosts module.
- * Note that this routine is called only at server shutdown time.
- */
 void
-nlm_shutdown_hosts(void)
+nlm_shutdown_hosts_net(struct net *net)
 {
        struct hlist_head *chain;
        struct hlist_node *pos;
@@ -582,6 +578,8 @@ nlm_shutdown_hosts(void)
        /* First, make all hosts eligible for gc */
        dprintk("lockd: nuking all hosts...\n");
        for_each_host(host, pos, chain, nlm_server_hosts) {
+               if (net && host->net != net)
+                       continue;
                host->h_expires = jiffies - 1;
                if (host->h_rpcclnt) {
                        rpc_shutdown_client(host->h_rpcclnt);
@@ -592,15 +590,29 @@ nlm_shutdown_hosts(void)
        /* Then, perform a garbage collection pass */
        nlm_gc_hosts();
        mutex_unlock(&nlm_host_mutex);
+}
+
+/*
+ * Shut down the hosts module.
+ * Note that this routine is called only at server shutdown time.
+ */
+void
+nlm_shutdown_hosts(void)
+{
+       struct hlist_head *chain;
+       struct hlist_node *pos;
+       struct nlm_host *host;
+
+       nlm_shutdown_hosts_net(NULL);
 
        /* complain if any hosts are left */
        if (nrhosts != 0) {
                printk(KERN_WARNING "lockd: couldn't shutdown host module!\n");
                dprintk("lockd: %lu hosts left:\n", nrhosts);
                for_each_host(host, pos, chain, nlm_server_hosts) {
-                       dprintk("       %s (cnt %d use %d exp %ld)\n",
+                       dprintk("       %s (cnt %d use %d exp %ld net %p)\n",
                                host->h_name, atomic_read(&host->h_count),
-                               host->h_inuse, host->h_expires);
+                               host->h_inuse, host->h_expires, host->net);
                }
        }
 }

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 90dec42..2774e10 100644 (file)
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -281,8 +281,10 @@ static void lockd_down_net(struct net *net)
        struct svc_serv *serv = nlmsvc_rqst->rq_server;
 
        if (ln->nlmsvc_users) {
-               if (--ln->nlmsvc_users == 0)
+               if (--ln->nlmsvc_users == 0) {
+                       nlm_shutdown_hosts_net(net);
                        svc_shutdown_net(serv, net);
+               }
        } else {
                printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n",
                                nlmsvc_task, net);

diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 94b3d13..f04ce6a 100644 (file)
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -234,6 +234,7 @@ struct rpc_clnt * nlm_bind_host(struct nlm_host *);
 void             nlm_rebind_host(struct nlm_host *);
 struct nlm_host * nlm_get_host(struct nlm_host *);
 void             nlm_shutdown_hosts(void);
+void             nlm_shutdown_hosts_net(struct net *net);
 void             nlm_host_rebooted(const struct nlm_reboot *);
 
 /*