lockd: remove net pointer from messages

Publishing of net pointer is not safe, use net->ns.inum as net ID in debug messages [ 171.757678] lockd_up_net: per-net data created; net=f00001e7 [ 171.767188] NFSD: starting 90-second grace period (net f00001e7) [ 300.653313] lockd: nuking all hosts in net f00001e7... [ 300.653641] lockd: host garbage collection for net f00001e7 [ 300.653968] lockd: nlmsvc_mark_resources for net f00001e7 [ 300.711483] lockd_down_net: per-net data destroyed; net=f00001e7 [ 300.711847] lockd: nuking all hosts in net 0... [ 300.711847] lockd: host garbage collection for net 0 [ 300.711848] lockd: nlmsvc_mark_resources for net 0 Signed-off-by: Vasily Averin <[email protected]> Signed-off-by: J. Bruce Fields <[email protected]>
rountree · Nov 27, 2017 · e919b07 · e919b07
1 parent ba58952
commit e919b07
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Showing 4 changed files with 21 additions and 14 deletions.
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
@@ -578,8 +578,10 @@ static void nlm_complain_hosts(struct net *net)
 
 		if (ln->nrhosts == 0)
 			return;
-		printk(KERN_WARNING "lockd: couldn't shutdown host module for net %p!\n", net);
-		dprintk("lockd: %lu hosts left in net %p:\n", ln->nrhosts, net);
+		pr_warn("lockd: couldn't shutdown host module for net %x!\n",
+			net->ns.inum);
+		dprintk("lockd: %lu hosts left in net %x:\n", ln->nrhosts,
+			net->ns.inum);
 	} else {
 		if (nrhosts == 0)
 			return;
@@ -590,9 +592,9 @@ static void nlm_complain_hosts(struct net *net)
 	for_each_host(host, chain, nlm_server_hosts) {
 		if (net && host->net != net)
 			continue;
-		dprintk("       %s (cnt %d use %d exp %ld net %p)\n",
+		dprintk("       %s (cnt %d use %d exp %ld net %x)\n",
 			host->h_name, atomic_read(&host->h_count),
-			host->h_inuse, host->h_expires, host->net);
+			host->h_inuse, host->h_expires, host->net->ns.inum);
 	}
 }
 
@@ -605,7 +607,8 @@ nlm_shutdown_hosts_net(struct net *net)
 	mutex_lock(&nlm_host_mutex);
 
 	/* First, make all hosts eligible for gc */
-	dprintk("lockd: nuking all hosts in net %p...\n", net);
+	dprintk("lockd: nuking all hosts in net %x...\n",
+		net ? net->ns.inum : 0);
 	for_each_host(host, chain, nlm_server_hosts) {
 		if (net && host->net != net)
 			continue;
@@ -646,7 +649,8 @@ nlm_gc_hosts(struct net *net)
 	struct hlist_node *next;
 	struct nlm_host	*host;
 
-	dprintk("lockd: host garbage collection for net %p\n", net);
+	dprintk("lockd: host garbage collection for net %x\n",
+		net ? net->ns.inum : 0);
 	for_each_host(host, chain, nlm_server_hosts) {
 		if (net && host->net != net)
 			continue;
@@ -662,9 +666,10 @@ nlm_gc_hosts(struct net *net)
 		if (atomic_read(&host->h_count) || host->h_inuse
 		 || time_before(jiffies, host->h_expires)) {
 			dprintk("nlm_gc_hosts skipping %s "
-				"(cnt %d use %d exp %ld net %p)\n",
+				"(cnt %d use %d exp %ld net %x)\n",
 				host->h_name, atomic_read(&host->h_count),
-				host->h_inuse, host->h_expires, host->net);
+				host->h_inuse, host->h_expires,
+				host->net->ns.inum);
 			continue;
 		}
 		nlm_destroy_host_locked(host);

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
@@ -110,7 +110,8 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
 	clnt = nsm_create(host->net, host->nodename);
 	if (IS_ERR(clnt)) {
 		dprintk("lockd: failed to create NSM upcall transport, "
-			"status=%ld, net=%p\n", PTR_ERR(clnt), host->net);
+			"status=%ld, net=%x\n", PTR_ERR(clnt),
+			host->net->ns.inum);
 		return PTR_ERR(clnt);
 	}
 

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
@@ -259,7 +259,7 @@ static int lockd_up_net(struct svc_serv *serv, struct net *net)
 	if (error < 0)
 		goto err_bind;
 	set_grace_period(net);
-	dprintk("lockd_up_net: per-net data created; net=%p\n", net);
+	dprintk("%s: per-net data created; net=%x\n", __func__, net->ns.inum);
 	return 0;
 
 err_bind:
@@ -275,11 +275,12 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
 		if (--ln->nlmsvc_users == 0) {
 			nlm_shutdown_hosts_net(net);
 			svc_shutdown_net(serv, net);
-			dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net);
+			dprintk("%s: per-net data destroyed; net=%x\n",
+				__func__, net->ns.inum);
 		}
 	} else {
-		printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n",
-				nlmsvc_task, net);
+		pr_err("%s: no users! task=%p, net=%x\n",
+			__func__, nlmsvc_task, net->ns.inum);
 		BUG();
 	}
 }

diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
@@ -370,7 +370,7 @@ nlmsvc_mark_resources(struct net *net)
 {
 	struct nlm_host hint;
 
-	dprintk("lockd: nlmsvc_mark_resources for net %p\n", net);
+	dprintk("lockd: %s for net %x\n", __func__, net ? net->ns.inum : 0);
 	hint.net = net;
 	nlm_traverse_files(&hint, nlmsvc_mark_host, NULL);
 }