sctp: Make the proc files per network namespace.

- Convert all of the files under /proc/net/sctp to be per
  network namespace.

- Don't print anything for /proc/net/sctp/snmp except in
  the initial network namespaces as the snmp counters still
  have to be converted to be per network namespace.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 39 insertions, 20 deletions

diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index 1e2eee88c3ea..dc79a3aa0382 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -80,8 +80,12 @@ static const struct snmp_mib sctp_snmp_list[] = {
 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
 {
+        struct net *net = seq->private;
         int i;
 
+        if (!net_eq(net, &init_net))
+                return 0;
+
         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
                            snmp_fold_field((void __percpu **)sctp_statistics,
@@ -93,7 +97,7 @@ static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
 /* Initialize the seq file operations for 'snmp' object. */
 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
 {
-        return single_open(file, sctp_snmp_seq_show, NULL);
+        return single_open_net(inode, file, sctp_snmp_seq_show);
 }
 
 static const struct file_operations sctp_snmp_seq_fops = {
@@ -105,11 +109,12 @@ static const struct file_operations sctp_snmp_seq_fops = {
 };
 
 /* Set up the proc fs entry for 'snmp' object. */
-int __init sctp_snmp_proc_init(void)
+int __net_init sctp_snmp_proc_init(struct net *net)
 {
         struct proc_dir_entry *p;
 
-        p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
+        p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
+                        &sctp_snmp_seq_fops);
         if (!p)
                 return -ENOMEM;
 
@@ -117,9 +122,9 @@ int __init sctp_snmp_proc_init(void)
 }
 
 /* Cleanup the proc fs entry for 'snmp' object. */
-void sctp_snmp_proc_exit(void)
+void sctp_snmp_proc_exit(struct net *net)
 {
-        remove_proc_entry("snmp", proc_net_sctp);
+        remove_proc_entry("snmp", net->sctp.proc_net_sctp);
 }
 
 /* Dump local addresses of an association/endpoint. */
@@ -197,6 +202,7 @@ static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 /* Display sctp endpoints (/proc/net/sctp/eps). */
 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 {
+        struct seq_net_private *priv = seq->private;
         struct sctp_hashbucket *head;
         struct sctp_ep_common *epb;
         struct sctp_endpoint *ep;
@@ -213,6 +219,8 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
         sctp_for_each_hentry(epb, node, &head->chain) {
                 ep = sctp_ep(epb);
                 sk = epb->sk;
+                if (!net_eq(sock_net(sk), priv->net))
+                        continue;
                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
                            sctp_sk(sk)->type, sk->sk_state, hash,
                            epb->bind_addr.port,
@@ -238,7 +246,8 @@ static const struct seq_operations sctp_eps_ops = {
 /* Initialize the seq file operations for 'eps' object. */
 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 {
-        return seq_open(file, &sctp_eps_ops);
+        return seq_open_net(inode, file, &sctp_eps_ops,
+                            sizeof(struct seq_net_private));
 }
 
 static const struct file_operations sctp_eps_seq_fops = {
@@ -249,11 +258,12 @@ static const struct file_operations sctp_eps_seq_fops = {
 };
 
 /* Set up the proc fs entry for 'eps' object. */
-int __init sctp_eps_proc_init(void)
+int __net_init sctp_eps_proc_init(struct net *net)
 {
         struct proc_dir_entry *p;
 
-        p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
+        p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
+                        &sctp_eps_seq_fops);
         if (!p)
                 return -ENOMEM;
 
@@ -261,9 +271,9 @@ int __init sctp_eps_proc_init(void)
 }
 
 /* Cleanup the proc fs entry for 'eps' object. */
-void sctp_eps_proc_exit(void)
+void sctp_eps_proc_exit(struct net *net)
 {
-        remove_proc_entry("eps", proc_net_sctp);
+        remove_proc_entry("eps", net->sctp.proc_net_sctp);
 }
 
 
@@ -300,6 +310,7 @@ static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 /* Display sctp associations (/proc/net/sctp/assocs). */
 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 {
+        struct seq_net_private *priv = seq->private;
         struct sctp_hashbucket *head;
         struct sctp_ep_common *epb;
         struct sctp_association *assoc;
@@ -316,6 +327,8 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
         sctp_for_each_hentry(epb, node, &head->chain) {
                 assoc = sctp_assoc(epb);
                 sk = epb->sk;
+                if (!net_eq(sock_net(sk), priv->net))
+                        continue;
                 seq_printf(seq,
                            "%8pK %8pK %-3d %-3d %-2d %-4d "
                            "%4d %8d %8d %7d %5lu %-5d %5d ",
@@ -354,7 +367,8 @@ static const struct seq_operations sctp_assoc_ops = {
 /* Initialize the seq file operations for 'assocs' object. */
 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 {
-        return seq_open(file, &sctp_assoc_ops);
+        return seq_open_net(inode, file, &sctp_assoc_ops,
+                            sizeof(struct seq_net_private));
 }
 
 static const struct file_operations sctp_assocs_seq_fops = {
@@ -365,11 +379,11 @@ static const struct file_operations sctp_assocs_seq_fops = {
 };
 
 /* Set up the proc fs entry for 'assocs' object. */
-int __init sctp_assocs_proc_init(void)
+int __net_init sctp_assocs_proc_init(struct net *net)
 {
         struct proc_dir_entry *p;
 
-        p = proc_create("assocs", S_IRUGO, proc_net_sctp,
+        p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
                         &sctp_assocs_seq_fops);
         if (!p)
                 return -ENOMEM;
@@ -378,9 +392,9 @@ int __init sctp_assocs_proc_init(void)
 }
 
 /* Cleanup the proc fs entry for 'assocs' object. */
-void sctp_assocs_proc_exit(void)
+void sctp_assocs_proc_exit(struct net *net)
 {
-        remove_proc_entry("assocs", proc_net_sctp);
+        remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 }
 
 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
@@ -412,6 +426,7 @@ static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 
 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 {
+        struct seq_net_private *priv = seq->private;
         struct sctp_hashbucket *head;
         struct sctp_ep_common *epb;
         struct sctp_association *assoc;
@@ -426,6 +441,8 @@ static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
         sctp_local_bh_disable();
         read_lock(&head->lock);
         sctp_for_each_hentry(epb, node, &head->chain) {
+                if (!net_eq(sock_net(epb->sk), priv->net))
+                        continue;
                 assoc = sctp_assoc(epb);
                 list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
                                         transports) {
@@ -489,14 +506,15 @@ static const struct seq_operations sctp_remaddr_ops = {
 };
 
 /* Cleanup the proc fs entry for 'remaddr' object. */
-void sctp_remaddr_proc_exit(void)
+void sctp_remaddr_proc_exit(struct net *net)
 {
-        remove_proc_entry("remaddr", proc_net_sctp);
+        remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 }
 
 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 {
-        return seq_open(file, &sctp_remaddr_ops);
+        return seq_open_net(inode, file, &sctp_remaddr_ops,
+                            sizeof(struct seq_net_private));
 }
 
 static const struct file_operations sctp_remaddr_seq_fops = {
@@ -506,11 +524,12 @@ static const struct file_operations sctp_remaddr_seq_fops = {
         .release = seq_release,
 };
 
-int __init sctp_remaddr_proc_init(void)
+int __net_init sctp_remaddr_proc_init(struct net *net)
 {
         struct proc_dir_entry *p;
 
-        p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops);
+        p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
+                        &sctp_remaddr_seq_fops);
         if (!p)
                 return -ENOMEM;
         return 0;