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>

diff --git a/include/net/netns/sctp.h b/include/net/netns/sctp.h
index 29e36b4..9c20a82 100644 (file)
--- a/include/net/netns/sctp.h
+++ b/include/net/netns/sctp.h
@@ -2,8 +2,13 @@
 #define __NETNS_SCTP_H__
 
 struct sock;
+struct proc_dir_entry;
 
 struct netns_sctp {
+#ifdef CONFIG_PROC_FS
+       struct proc_dir_entry *proc_net_sctp;
+#endif
+
        /* This is the global socket data structure used for responding to
         * the Out-of-the-blue (OOTB) packets.  A control sock will be created
         * for this socket at the initialization time.

diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 550a81b..b49588a 100644 (file)
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -172,14 +172,14 @@ void sctp_backlog_migrate(struct sctp_association *assoc,
 /*
  * sctp/proc.c
  */
-int sctp_snmp_proc_init(void);
-void sctp_snmp_proc_exit(void);
-int sctp_eps_proc_init(void);
-void sctp_eps_proc_exit(void);
-int sctp_assocs_proc_init(void);
-void sctp_assocs_proc_exit(void);
-int sctp_remaddr_proc_init(void);
-void sctp_remaddr_proc_exit(void);
+int sctp_snmp_proc_init(struct net *net);
+void sctp_snmp_proc_exit(struct net *net);
+int sctp_eps_proc_init(struct net *net);
+void sctp_eps_proc_exit(struct net *net);
+int sctp_assocs_proc_init(struct net *net);
+void sctp_assocs_proc_exit(struct net *net);
+int sctp_remaddr_proc_init(struct net *net);
+void sctp_remaddr_proc_exit(struct net *net);
 
 
 /*
@@ -360,16 +360,16 @@ atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
 #define SCTP_DBG_OBJCNT_ENTRY(name) \
 {.label= #name, .counter= &sctp_dbg_objcnt_## name}
 
-void sctp_dbg_objcnt_init(void);
-void sctp_dbg_objcnt_exit(void);
+void sctp_dbg_objcnt_init(struct net *);
+void sctp_dbg_objcnt_exit(struct net *);
 
 #else
 
 #define SCTP_DBG_OBJCNT_INC(name)
 #define SCTP_DBG_OBJCNT_DEC(name)
 
-static inline void sctp_dbg_objcnt_init(void) { return; }
-static inline void sctp_dbg_objcnt_exit(void) { return; }
+static inline void sctp_dbg_objcnt_init(struct net *) { return; }
+static inline void sctp_dbg_objcnt_exit(struct net *) { return; }
 
 #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
 
@@ -585,7 +585,6 @@ for (pos = chunk->subh.fwdtsn_hdr->skip;\
 
 extern struct proto sctp_prot;
 extern struct proto sctpv6_prot;
-extern struct proc_dir_entry *proc_net_sctp;
 void sctp_put_port(struct sock *sk);
 
 extern struct idr sctp_assocs_id;

diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c
index 8ef8e7d..fe012c4 100644 (file)
--- a/net/sctp/objcnt.c
+++ b/net/sctp/objcnt.c
@@ -129,20 +129,20 @@ static const struct file_operations sctp_objcnt_ops = {
 };
 
 /* Initialize the objcount in the proc filesystem.  */
-void sctp_dbg_objcnt_init(void)
+void sctp_dbg_objcnt_init(struct net *net)
 {
        struct proc_dir_entry *ent;
 
        ent = proc_create("sctp_dbg_objcnt", 0,
-                         proc_net_sctp, &sctp_objcnt_ops);
+                         net->sctp.proc_net_sctp, &sctp_objcnt_ops);
        if (!ent)
                pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n");
 }
 
 /* Cleanup the objcount entry in the proc filesystem.  */
-void sctp_dbg_objcnt_exit(void)
+void sctp_dbg_objcnt_exit(struct net *net)
 {
-       remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp);
+       remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp);
 }
 
 

diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index 1e2eee8..dc79a3a 100644 (file)
--- 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;

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 48a5989..de7994e 100644 (file)
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -71,10 +71,6 @@
 struct sctp_globals sctp_globals __read_mostly;
 DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
 
-#ifdef CONFIG_PROC_FS
-struct proc_dir_entry  *proc_net_sctp;
-#endif
-
 struct idr sctp_assocs_id;
 DEFINE_SPINLOCK(sctp_assocs_id_lock);
 
@@ -91,60 +87,52 @@ int sysctl_sctp_rmem[3];
 int sysctl_sctp_wmem[3];
 
 /* Set up the proc fs entry for the SCTP protocol. */
-static __init int sctp_proc_init(void)
+static __net_init int sctp_proc_init(struct net *net)
 {
 #ifdef CONFIG_PROC_FS
-       if (!proc_net_sctp) {
-               proc_net_sctp = proc_mkdir("sctp", init_net.proc_net);
-               if (!proc_net_sctp)
-                       goto out_free_percpu;
-       }
-
-       if (sctp_snmp_proc_init())
+       net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
+       if (!net->sctp.proc_net_sctp)
+               goto out_proc_net_sctp;
+       if (sctp_snmp_proc_init(net))
                goto out_snmp_proc_init;
-       if (sctp_eps_proc_init())
+       if (sctp_eps_proc_init(net))
                goto out_eps_proc_init;
-       if (sctp_assocs_proc_init())
+       if (sctp_assocs_proc_init(net))
                goto out_assocs_proc_init;
-       if (sctp_remaddr_proc_init())
+       if (sctp_remaddr_proc_init(net))
                goto out_remaddr_proc_init;
 
        return 0;
 
 out_remaddr_proc_init:
-       sctp_assocs_proc_exit();
+       sctp_assocs_proc_exit(net);
 out_assocs_proc_init:
-       sctp_eps_proc_exit();
+       sctp_eps_proc_exit(net);
 out_eps_proc_init:
-       sctp_snmp_proc_exit();
+       sctp_snmp_proc_exit(net);
 out_snmp_proc_init:
-       if (proc_net_sctp) {
-               proc_net_sctp = NULL;
-               remove_proc_entry("sctp", init_net.proc_net);
-       }
-out_free_percpu:
-#else
-       return 0;
-#endif /* CONFIG_PROC_FS */
+       remove_proc_entry("sctp", net->proc_net);
+       net->sctp.proc_net_sctp = NULL;
+out_proc_net_sctp:
        return -ENOMEM;
+#endif /* CONFIG_PROC_FS */
+       return 0;
 }
 
 /* Clean up the proc fs entry for the SCTP protocol.
  * Note: Do not make this __exit as it is used in the init error
  * path.
  */
-static void sctp_proc_exit(void)
+static void sctp_proc_exit(struct net *net)
 {
 #ifdef CONFIG_PROC_FS
-       sctp_snmp_proc_exit();
-       sctp_eps_proc_exit();
-       sctp_assocs_proc_exit();
-       sctp_remaddr_proc_exit();
-
-       if (proc_net_sctp) {
-               proc_net_sctp = NULL;
-               remove_proc_entry("sctp", init_net.proc_net);
-       }
+       sctp_snmp_proc_exit(net);
+       sctp_eps_proc_exit(net);
+       sctp_assocs_proc_exit(net);
+       sctp_remaddr_proc_exit(net);
+
+       remove_proc_entry("sctp", net->proc_net);
+       net->sctp.proc_net_sctp = NULL;
 #endif
 }
 
@@ -1180,6 +1168,13 @@ static int sctp_net_init(struct net *net)
 {
        int status;
 
+       /* Initialize proc fs directory.  */
+       status = sctp_proc_init(net);
+       if (status)
+               goto err_init_proc;
+
+       sctp_dbg_objcnt_init(net);
+
        /* Initialize the control inode/socket for handling OOTB packets.  */
        if ((status = sctp_ctl_sock_init(net))) {
                pr_err("Failed to initialize the SCTP control sock\n");
@@ -1202,6 +1197,9 @@ static int sctp_net_init(struct net *net)
        return 0;
 
 err_ctl_sock_init:
+       sctp_dbg_objcnt_exit(net);
+       sctp_proc_exit(net);
+err_init_proc:
        return status;
 }
 
@@ -1213,6 +1211,10 @@ static void sctp_net_exit(struct net *net)
 
        /* Free the control endpoint.  */
        inet_ctl_sock_destroy(net->sctp.ctl_sock);
+
+       sctp_dbg_objcnt_exit(net);
+
+       sctp_proc_exit(net);
 }
 
 static struct pernet_operations sctp_net_ops = {
@@ -1259,14 +1261,6 @@ SCTP_STATIC __init int sctp_init(void)
        if (status)
                goto err_percpu_counter_init;
 
-       /* Initialize proc fs directory.  */
-       status = sctp_proc_init();
-       if (status)
-               goto err_init_proc;
-
-       /* Initialize object count debugging.  */
-       sctp_dbg_objcnt_init();
-
        /*
         * 14. Suggested SCTP Protocol Parameter Values
         */
@@ -1476,9 +1470,6 @@ err_ehash_alloc:
                   get_order(sctp_assoc_hashsize *
                             sizeof(struct sctp_hashbucket)));
 err_ahash_alloc:
-       sctp_dbg_objcnt_exit();
-       sctp_proc_exit();
-err_init_proc:
        percpu_counter_destroy(&sctp_sockets_allocated);
 err_percpu_counter_init:
        cleanup_sctp_mibs();
@@ -1520,9 +1511,7 @@ SCTP_STATIC __exit void sctp_exit(void)
                   get_order(sctp_port_hashsize *
                             sizeof(struct sctp_bind_hashbucket)));
 
-       sctp_dbg_objcnt_exit();
        percpu_counter_destroy(&sctp_sockets_allocated);
-       sctp_proc_exit();
        cleanup_sctp_mibs();
 
        rcu_barrier(); /* Wait for completion of call_rcu()'s */