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authorRémi Denis-Courmont <remi.denis-courmont@nokia.com>2009-07-20 21:57:57 -0400
committerDavid S. Miller <davem@davemloft.net>2009-07-23 20:58:19 -0400
commitc1dc13e9d0bc35a8d85bf4238c48c1b627d48f35 (patch)
tree7bc3ecf8a72b1dc940f6cd676eb9bcfebfc2402e
parente8834a63bddf87f7b85955d1ba60d28343d88469 (diff)
Phonet: sockets list through proc_fs
This provides a list of sockets with their Phonet bind addresses and some socket debug informations through /proc/net/phonet. Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/phonet/pn_dev.h2
-rw-r--r--net/phonet/pn_dev.c7
-rw-r--r--net/phonet/socket.c96
3 files changed, 105 insertions, 0 deletions
diff --git a/include/net/phonet/pn_dev.h b/include/net/phonet/pn_dev.h
index 29d126736611..44c923c9e21d 100644
--- a/include/net/phonet/pn_dev.h
+++ b/include/net/phonet/pn_dev.h
@@ -49,4 +49,6 @@ void phonet_address_notify(int event, struct net_device *dev, u8 addr);
49 49
50#define PN_NO_ADDR 0xff 50#define PN_NO_ADDR 0xff
51 51
52extern const struct file_operations pn_sock_seq_fops;
53
52#endif 54#endif
diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index b0d6ddd82a9d..5107b7949c9c 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -218,6 +218,11 @@ static int phonet_init_net(struct net *net)
218 if (!pnn) 218 if (!pnn)
219 return -ENOMEM; 219 return -ENOMEM;
220 220
221 if (!proc_net_fops_create(net, "phonet", 0, &pn_sock_seq_fops)) {
222 kfree(pnn);
223 return -ENOMEM;
224 }
225
221 INIT_LIST_HEAD(&pnn->pndevs.list); 226 INIT_LIST_HEAD(&pnn->pndevs.list);
222 spin_lock_init(&pnn->pndevs.lock); 227 spin_lock_init(&pnn->pndevs.lock);
223 net_assign_generic(net, phonet_net_id, pnn); 228 net_assign_generic(net, phonet_net_id, pnn);
@@ -233,6 +238,8 @@ static void phonet_exit_net(struct net *net)
233 for_each_netdev(net, dev) 238 for_each_netdev(net, dev)
234 phonet_device_destroy(dev); 239 phonet_device_destroy(dev);
235 rtnl_unlock(); 240 rtnl_unlock();
241
242 proc_net_remove(net, "phonet");
236 kfree(pnn); 243 kfree(pnn);
237} 244}
238 245
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index ada2a35bf7a2..aa1617a7f265 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -412,3 +412,99 @@ found:
412 return 0; 412 return 0;
413} 413}
414EXPORT_SYMBOL(pn_sock_get_port); 414EXPORT_SYMBOL(pn_sock_get_port);
415
416static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
417{
418 struct net *net = seq_file_net(seq);
419 struct hlist_node *node;
420 struct sock *sknode;
421
422 sk_for_each(sknode, node, &pnsocks.hlist) {
423 if (!net_eq(net, sock_net(sknode)))
424 continue;
425 if (!pos)
426 return sknode;
427 pos--;
428 }
429 return NULL;
430}
431
432static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)
433{
434 struct net *net = seq_file_net(seq);
435
436 do
437 sk = sk_next(sk);
438 while (sk && !net_eq(net, sock_net(sk)));
439
440 return sk;
441}
442
443static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)
444 __acquires(pnsocks.lock)
445{
446 spin_lock_bh(&pnsocks.lock);
447 return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
448}
449
450static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)
451{
452 struct sock *sk;
453
454 if (v == SEQ_START_TOKEN)
455 sk = pn_sock_get_idx(seq, 0);
456 else
457 sk = pn_sock_get_next(seq, v);
458 (*pos)++;
459 return sk;
460}
461
462static void pn_sock_seq_stop(struct seq_file *seq, void *v)
463 __releases(pnsocks.lock)
464{
465 spin_unlock_bh(&pnsocks.lock);
466}
467
468static int pn_sock_seq_show(struct seq_file *seq, void *v)
469{
470 int len;
471
472 if (v == SEQ_START_TOKEN)
473 seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue "
474 " uid inode ref pointer drops", &len);
475 else {
476 struct sock *sk = v;
477 struct pn_sock *pn = pn_sk(sk);
478
479 seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
480 "%d %p %d%n",
481 sk->sk_protocol, pn->sobject, 0, pn->resource,
482 sk->sk_state,
483 sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
484 sock_i_uid(sk), sock_i_ino(sk),
485 atomic_read(&sk->sk_refcnt), sk,
486 atomic_read(&sk->sk_drops), &len);
487 }
488 seq_printf(seq, "%*s\n", 127 - len, "");
489 return 0;
490}
491
492static const struct seq_operations pn_sock_seq_ops = {
493 .start = pn_sock_seq_start,
494 .next = pn_sock_seq_next,
495 .stop = pn_sock_seq_stop,
496 .show = pn_sock_seq_show,
497};
498
499static int pn_sock_open(struct inode *inode, struct file *file)
500{
501 return seq_open(file, &pn_sock_seq_ops);
502}
503
504const struct file_operations pn_sock_seq_fops = {
505 .owner = THIS_MODULE,
506 .open = pn_sock_open,
507 .read = seq_read,
508 .llseek = seq_lseek,
509 .release = seq_release,
510};