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authorRémi Denis-Courmont <remi.denis-courmont@nokia.com>2010-09-15 12:30:14 +0000
committerDavid S. Miller <davem@davemloft.net>2010-09-15 21:31:33 -0700
commit507215f8d04f9e61f38c975e61d93bcafd30815f (patch)
tree79a88610eaf8abcc3f160ca0ced0a1b4e72dfd80 /net/phonet
parentb6a563b2af4ec5b0363cf89869ba234c0e2cd3da (diff)
Phonet: list subscribed resources via proc_fs
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/phonet')
-rw-r--r--net/phonet/pn_dev.c2
-rw-r--r--net/phonet/socket.c96
2 files changed, 98 insertions, 0 deletions
diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index d0a429459370..947038ddd04c 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -373,6 +373,7 @@ int __init phonet_device_init(void)
if (err)
return err;
+ proc_net_fops_create(&init_net, "pnresource", 0, &pn_res_seq_fops);
register_netdevice_notifier(&phonet_device_notifier);
err = phonet_netlink_register();
if (err)
@@ -385,6 +386,7 @@ void phonet_device_exit(void)
rtnl_unregister_all(PF_PHONET);
unregister_netdevice_notifier(&phonet_device_notifier);
unregister_pernet_device(&phonet_net_ops);
+ proc_net_remove(&init_net, "pnresource");
}
int phonet_route_add(struct net_device *dev, u8 daddr)
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index d4f41afc0583..6bf6e3c97d5c 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -654,3 +654,99 @@ void pn_sock_unbind_all_res(struct sock *sk)
match--;
}
}
+
+#ifdef CONFIG_PROC_FS
+static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct net *net = seq_file_net(seq);
+ unsigned i;
+
+ if (!net_eq(net, &init_net))
+ return NULL;
+
+ for (i = 0; i < 256; i++) {
+ if (pnres.sk[i] == NULL)
+ continue;
+ if (!pos)
+ return pnres.sk + i;
+ pos--;
+ }
+ return NULL;
+}
+
+static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk)
+{
+ struct net *net = seq_file_net(seq);
+ unsigned i;
+
+ BUG_ON(!net_eq(net, &init_net));
+
+ for (i = (sk - pnres.sk) + 1; i < 256; i++)
+ if (pnres.sk[i])
+ return pnres.sk + i;
+ return NULL;
+}
+
+static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(resource_mutex)
+{
+ mutex_lock(&resource_mutex);
+ return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
+}
+
+static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct sock **sk;
+
+ if (v == SEQ_START_TOKEN)
+ sk = pn_res_get_idx(seq, 0);
+ else
+ sk = pn_res_get_next(seq, v);
+ (*pos)++;
+ return sk;
+}
+
+static void pn_res_seq_stop(struct seq_file *seq, void *v)
+ __releases(resource_mutex)
+{
+ mutex_unlock(&resource_mutex);
+}
+
+static int pn_res_seq_show(struct seq_file *seq, void *v)
+{
+ int len;
+
+ if (v == SEQ_START_TOKEN)
+ seq_printf(seq, "%s%n", "rs uid inode", &len);
+ else {
+ struct sock **psk = v;
+ struct sock *sk = *psk;
+
+ seq_printf(seq, "%02X %5d %lu%n",
+ psk - pnres.sk, sock_i_uid(sk), sock_i_ino(sk), &len);
+ }
+ seq_printf(seq, "%*s\n", 63 - len, "");
+ return 0;
+}
+
+static const struct seq_operations pn_res_seq_ops = {
+ .start = pn_res_seq_start,
+ .next = pn_res_seq_next,
+ .stop = pn_res_seq_stop,
+ .show = pn_res_seq_show,
+};
+
+static int pn_res_open(struct inode *inode, struct file *file)
+{
+ return seq_open_net(inode, file, &pn_res_seq_ops,
+ sizeof(struct seq_net_private));
+}
+
+const struct file_operations pn_res_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = pn_res_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_net,
+};
+#endif

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