blob: c785bfd0744f149b753506f8f2f754329410f8ad [file] [log] [blame]
Remi Denis-Courmontba113a92008-09-22 20:05:19 -07001/*
2 * File: socket.c
3 *
4 * Phonet sockets
5 *
6 * Copyright (C) 2008 Nokia Corporation.
7 *
8 * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
9 * Original author: Sakari Ailus <sakari.ailus@nokia.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * version 2 as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23 * 02110-1301 USA
24 */
25
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/gfp.h>
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070027#include <linux/kernel.h>
28#include <linux/net.h>
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -070029#include <linux/poll.h>
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070030#include <net/sock.h>
31#include <net/tcp_states.h>
32
33#include <linux/phonet.h>
34#include <net/phonet/phonet.h>
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -070035#include <net/phonet/pep.h>
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070036#include <net/phonet/pn_dev.h>
37
38static int pn_socket_release(struct socket *sock)
39{
40 struct sock *sk = sock->sk;
41
42 if (sk) {
43 sock->sk = NULL;
44 sk->sk_prot->close(sk, 0);
45 }
46 return 0;
47}
48
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +000049#define PN_HASHSIZE 16
50#define PN_HASHMASK (PN_HASHSIZE-1)
51
52
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070053static struct {
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +000054 struct hlist_head hlist[PN_HASHSIZE];
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070055 spinlock_t lock;
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +000056} pnsocks;
57
58void __init pn_sock_init(void)
59{
60 unsigned i;
61
62 for (i = 0; i < PN_HASHSIZE; i++)
63 INIT_HLIST_HEAD(pnsocks.hlist + i);
64 spin_lock_init(&pnsocks.lock);
65}
66
67static struct hlist_head *pn_hash_list(u16 obj)
68{
69 return pnsocks.hlist + (obj & PN_HASHMASK);
70}
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070071
72/*
73 * Find address based on socket address, match only certain fields.
74 * Also grab sock if it was found. Remember to sock_put it later.
75 */
Rémi Denis-Courmont52404882008-12-03 15:42:56 -080076struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn)
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070077{
78 struct hlist_node *node;
79 struct sock *sknode;
80 struct sock *rval = NULL;
81 u16 obj = pn_sockaddr_get_object(spn);
82 u8 res = spn->spn_resource;
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +000083 struct hlist_head *hlist = pn_hash_list(obj);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070084
85 spin_lock_bh(&pnsocks.lock);
86
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +000087 sk_for_each(sknode, node, hlist) {
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070088 struct pn_sock *pn = pn_sk(sknode);
89 BUG_ON(!pn->sobject); /* unbound socket */
90
Rémi Denis-Courmont52404882008-12-03 15:42:56 -080091 if (!net_eq(sock_net(sknode), net))
92 continue;
Remi Denis-Courmontba113a92008-09-22 20:05:19 -070093 if (pn_port(obj)) {
94 /* Look up socket by port */
95 if (pn_port(pn->sobject) != pn_port(obj))
96 continue;
97 } else {
98 /* If port is zero, look up by resource */
99 if (pn->resource != res)
100 continue;
101 }
Joe Perchesf64f9e72009-11-29 16:55:45 -0800102 if (pn_addr(pn->sobject) &&
103 pn_addr(pn->sobject) != pn_addr(obj))
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700104 continue;
105
106 rval = sknode;
107 sock_hold(sknode);
108 break;
109 }
110
111 spin_unlock_bh(&pnsocks.lock);
112
113 return rval;
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000114}
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700115
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000116/* Deliver a broadcast packet (only in bottom-half) */
117void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb)
118{
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000119 struct hlist_head *hlist = pnsocks.hlist;
120 unsigned h;
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000121
122 spin_lock(&pnsocks.lock);
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000123 for (h = 0; h < PN_HASHSIZE; h++) {
124 struct hlist_node *node;
125 struct sock *sknode;
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000126
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000127 sk_for_each(sknode, node, hlist) {
128 struct sk_buff *clone;
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000129
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000130 if (!net_eq(sock_net(sknode), net))
131 continue;
132 if (!sock_flag(sknode, SOCK_BROADCAST))
133 continue;
134
135 clone = skb_clone(skb, GFP_ATOMIC);
136 if (clone) {
137 sock_hold(sknode);
138 sk_receive_skb(sknode, clone, 0);
139 }
Rémi Denis-Courmont21912d12009-10-15 12:29:14 -0700140 }
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000141 hlist++;
Rémi Denis-Courmontf14001f2009-10-14 00:48:27 +0000142 }
143 spin_unlock(&pnsocks.lock);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700144}
145
146void pn_sock_hash(struct sock *sk)
147{
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000148 struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject);
149
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700150 spin_lock_bh(&pnsocks.lock);
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000151 sk_add_node(sk, hlist);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700152 spin_unlock_bh(&pnsocks.lock);
153}
154EXPORT_SYMBOL(pn_sock_hash);
155
156void pn_sock_unhash(struct sock *sk)
157{
158 spin_lock_bh(&pnsocks.lock);
159 sk_del_node_init(sk);
160 spin_unlock_bh(&pnsocks.lock);
161}
162EXPORT_SYMBOL(pn_sock_unhash);
163
Rémi Denis-Courmont582b0b62009-09-23 03:17:10 +0000164static DEFINE_MUTEX(port_mutex);
165
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700166static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
167{
168 struct sock *sk = sock->sk;
169 struct pn_sock *pn = pn_sk(sk);
170 struct sockaddr_pn *spn = (struct sockaddr_pn *)addr;
171 int err;
172 u16 handle;
173 u8 saddr;
174
175 if (sk->sk_prot->bind)
176 return sk->sk_prot->bind(sk, addr, len);
177
178 if (len < sizeof(struct sockaddr_pn))
179 return -EINVAL;
180 if (spn->spn_family != AF_PHONET)
181 return -EAFNOSUPPORT;
182
183 handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr);
184 saddr = pn_addr(handle);
Rémi Denis-Courmont52404882008-12-03 15:42:56 -0800185 if (saddr && phonet_address_lookup(sock_net(sk), saddr))
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700186 return -EADDRNOTAVAIL;
187
188 lock_sock(sk);
189 if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) {
190 err = -EINVAL; /* attempt to rebind */
191 goto out;
192 }
Rémi Denis-Courmont582b0b62009-09-23 03:17:10 +0000193 WARN_ON(sk_hashed(sk));
194 mutex_lock(&port_mutex);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700195 err = sk->sk_prot->get_port(sk, pn_port(handle));
196 if (err)
Rémi Denis-Courmont582b0b62009-09-23 03:17:10 +0000197 goto out_port;
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700198
199 /* get_port() sets the port, bind() sets the address if applicable */
200 pn->sobject = pn_object(saddr, pn_port(pn->sobject));
201 pn->resource = spn->spn_resource;
202
203 /* Enable RX on the socket */
204 sk->sk_prot->hash(sk);
Rémi Denis-Courmont582b0b62009-09-23 03:17:10 +0000205out_port:
206 mutex_unlock(&port_mutex);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700207out:
208 release_sock(sk);
209 return err;
210}
211
212static int pn_socket_autobind(struct socket *sock)
213{
214 struct sockaddr_pn sa;
215 int err;
216
217 memset(&sa, 0, sizeof(sa));
218 sa.spn_family = AF_PHONET;
219 err = pn_socket_bind(sock, (struct sockaddr *)&sa,
220 sizeof(struct sockaddr_pn));
221 if (err != -EINVAL)
222 return err;
223 BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));
224 return 0; /* socket was already bound */
225}
226
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700227static int pn_socket_accept(struct socket *sock, struct socket *newsock,
228 int flags)
229{
230 struct sock *sk = sock->sk;
231 struct sock *newsk;
232 int err;
233
234 newsk = sk->sk_prot->accept(sk, flags, &err);
235 if (!newsk)
236 return err;
237
238 lock_sock(newsk);
239 sock_graft(newsk, newsock);
240 newsock->state = SS_CONNECTED;
241 release_sock(newsk);
242 return 0;
243}
244
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700245static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
246 int *sockaddr_len, int peer)
247{
248 struct sock *sk = sock->sk;
249 struct pn_sock *pn = pn_sk(sk);
250
251 memset(addr, 0, sizeof(struct sockaddr_pn));
252 addr->sa_family = AF_PHONET;
253 if (!peer) /* Race with bind() here is userland's problem. */
254 pn_sockaddr_set_object((struct sockaddr_pn *)addr,
255 pn->sobject);
256
257 *sockaddr_len = sizeof(struct sockaddr_pn);
258 return 0;
259}
260
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700261static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
262 poll_table *wait)
263{
264 struct sock *sk = sock->sk;
265 struct pep_sock *pn = pep_sk(sk);
266 unsigned int mask = 0;
267
268 poll_wait(file, &sock->wait, wait);
269
270 switch (sk->sk_state) {
271 case TCP_LISTEN:
272 return hlist_empty(&pn->ackq) ? 0 : POLLIN;
273 case TCP_CLOSE:
274 return POLLERR;
275 }
276
277 if (!skb_queue_empty(&sk->sk_receive_queue))
278 mask |= POLLIN | POLLRDNORM;
Rémi Denis-Courmontc41bd97f82008-10-05 11:15:43 -0700279 if (!skb_queue_empty(&pn->ctrlreq_queue))
280 mask |= POLLPRI;
281 if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700282 return POLLHUP;
283
Rémi Denis-Courmontbe677732008-12-17 15:48:31 -0800284 if (sk->sk_state == TCP_ESTABLISHED && atomic_read(&pn->tx_credits))
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700285 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
286
287 return mask;
288}
289
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700290static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
291 unsigned long arg)
292{
293 struct sock *sk = sock->sk;
294 struct pn_sock *pn = pn_sk(sk);
295
296 if (cmd == SIOCPNGETOBJECT) {
297 struct net_device *dev;
298 u16 handle;
299 u8 saddr;
300
301 if (get_user(handle, (__u16 __user *)arg))
302 return -EFAULT;
303
304 lock_sock(sk);
305 if (sk->sk_bound_dev_if)
306 dev = dev_get_by_index(sock_net(sk),
307 sk->sk_bound_dev_if);
308 else
309 dev = phonet_device_get(sock_net(sk));
310 if (dev && (dev->flags & IFF_UP))
311 saddr = phonet_address_get(dev, pn_addr(handle));
312 else
313 saddr = PN_NO_ADDR;
314 release_sock(sk);
315
316 if (dev)
317 dev_put(dev);
318 if (saddr == PN_NO_ADDR)
319 return -EHOSTUNREACH;
320
321 handle = pn_object(saddr, pn_port(pn->sobject));
322 return put_user(handle, (__u16 __user *)arg);
323 }
324
325 return sk->sk_prot->ioctl(sk, cmd, arg);
326}
327
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700328static int pn_socket_listen(struct socket *sock, int backlog)
329{
330 struct sock *sk = sock->sk;
331 int err = 0;
332
333 if (sock->state != SS_UNCONNECTED)
334 return -EINVAL;
335 if (pn_socket_autobind(sock))
336 return -ENOBUFS;
337
338 lock_sock(sk);
339 if (sk->sk_state != TCP_CLOSE) {
340 err = -EINVAL;
341 goto out;
342 }
343
344 sk->sk_state = TCP_LISTEN;
345 sk->sk_ack_backlog = 0;
346 sk->sk_max_ack_backlog = backlog;
347out:
348 release_sock(sk);
349 return err;
350}
351
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700352static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
353 struct msghdr *m, size_t total_len)
354{
355 struct sock *sk = sock->sk;
356
357 if (pn_socket_autobind(sock))
358 return -EAGAIN;
359
360 return sk->sk_prot->sendmsg(iocb, sk, m, total_len);
361}
362
363const struct proto_ops phonet_dgram_ops = {
364 .family = AF_PHONET,
365 .owner = THIS_MODULE,
366 .release = pn_socket_release,
367 .bind = pn_socket_bind,
368 .connect = sock_no_connect,
369 .socketpair = sock_no_socketpair,
370 .accept = sock_no_accept,
371 .getname = pn_socket_getname,
372 .poll = datagram_poll,
373 .ioctl = pn_socket_ioctl,
374 .listen = sock_no_listen,
375 .shutdown = sock_no_shutdown,
376 .setsockopt = sock_no_setsockopt,
377 .getsockopt = sock_no_getsockopt,
378#ifdef CONFIG_COMPAT
379 .compat_setsockopt = sock_no_setsockopt,
380 .compat_getsockopt = sock_no_getsockopt,
381#endif
382 .sendmsg = pn_socket_sendmsg,
383 .recvmsg = sock_common_recvmsg,
384 .mmap = sock_no_mmap,
385 .sendpage = sock_no_sendpage,
386};
387
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700388const struct proto_ops phonet_stream_ops = {
389 .family = AF_PHONET,
390 .owner = THIS_MODULE,
391 .release = pn_socket_release,
392 .bind = pn_socket_bind,
393 .connect = sock_no_connect,
394 .socketpair = sock_no_socketpair,
395 .accept = pn_socket_accept,
396 .getname = pn_socket_getname,
397 .poll = pn_socket_poll,
398 .ioctl = pn_socket_ioctl,
399 .listen = pn_socket_listen,
400 .shutdown = sock_no_shutdown,
Rémi Denis-Courmont02a47612008-10-05 11:16:16 -0700401 .setsockopt = sock_common_setsockopt,
402 .getsockopt = sock_common_getsockopt,
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700403#ifdef CONFIG_COMPAT
Rémi Denis-Courmont02a47612008-10-05 11:16:16 -0700404 .compat_setsockopt = compat_sock_common_setsockopt,
405 .compat_getsockopt = compat_sock_common_getsockopt,
Rémi Denis-Courmont9995a322008-10-05 11:14:48 -0700406#endif
407 .sendmsg = pn_socket_sendmsg,
408 .recvmsg = sock_common_recvmsg,
409 .mmap = sock_no_mmap,
410 .sendpage = sock_no_sendpage,
411};
412EXPORT_SYMBOL(phonet_stream_ops);
413
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700414/* allocate port for a socket */
415int pn_sock_get_port(struct sock *sk, unsigned short sport)
416{
417 static int port_cur;
Rémi Denis-Courmont52404882008-12-03 15:42:56 -0800418 struct net *net = sock_net(sk);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700419 struct pn_sock *pn = pn_sk(sk);
420 struct sockaddr_pn try_sa;
421 struct sock *tmpsk;
422
423 memset(&try_sa, 0, sizeof(struct sockaddr_pn));
424 try_sa.spn_family = AF_PHONET;
Rémi Denis-Courmont582b0b62009-09-23 03:17:10 +0000425 WARN_ON(!mutex_is_locked(&port_mutex));
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700426 if (!sport) {
427 /* search free port */
Remi Denis-Courmont87ab4e22008-09-22 20:08:39 -0700428 int port, pmin, pmax;
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700429
Remi Denis-Courmont87ab4e22008-09-22 20:08:39 -0700430 phonet_get_local_port_range(&pmin, &pmax);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700431 for (port = pmin; port <= pmax; port++) {
432 port_cur++;
433 if (port_cur < pmin || port_cur > pmax)
434 port_cur = pmin;
435
436 pn_sockaddr_set_port(&try_sa, port_cur);
Rémi Denis-Courmont52404882008-12-03 15:42:56 -0800437 tmpsk = pn_find_sock_by_sa(net, &try_sa);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700438 if (tmpsk == NULL) {
439 sport = port_cur;
440 goto found;
441 } else
442 sock_put(tmpsk);
443 }
444 } else {
445 /* try to find specific port */
446 pn_sockaddr_set_port(&try_sa, sport);
Rémi Denis-Courmont52404882008-12-03 15:42:56 -0800447 tmpsk = pn_find_sock_by_sa(net, &try_sa);
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700448 if (tmpsk == NULL)
449 /* No sock there! We can use that port... */
450 goto found;
451 else
452 sock_put(tmpsk);
453 }
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700454 /* the port must be in use already */
455 return -EADDRINUSE;
456
457found:
Remi Denis-Courmontba113a92008-09-22 20:05:19 -0700458 pn->sobject = pn_object(pn_addr(pn->sobject), sport);
459 return 0;
460}
461EXPORT_SYMBOL(pn_sock_get_port);
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000462
Randy Dunlapae6e2ae2009-08-17 10:35:49 +0000463#ifdef CONFIG_PROC_FS
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000464static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
465{
466 struct net *net = seq_file_net(seq);
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000467 struct hlist_head *hlist = pnsocks.hlist;
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000468 struct hlist_node *node;
469 struct sock *sknode;
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000470 unsigned h;
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000471
Rémi Denis-Courmont6b0d07b2009-11-09 02:17:01 +0000472 for (h = 0; h < PN_HASHSIZE; h++) {
473 sk_for_each(sknode, node, hlist) {
474 if (!net_eq(net, sock_net(sknode)))
475 continue;
476 if (!pos)
477 return sknode;
478 pos--;
479 }
480 hlist++;
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000481 }
482 return NULL;
483}
484
485static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)
486{
487 struct net *net = seq_file_net(seq);
488
489 do
490 sk = sk_next(sk);
491 while (sk && !net_eq(net, sock_net(sk)));
492
493 return sk;
494}
495
496static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)
497 __acquires(pnsocks.lock)
498{
499 spin_lock_bh(&pnsocks.lock);
500 return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
501}
502
503static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)
504{
505 struct sock *sk;
506
507 if (v == SEQ_START_TOKEN)
508 sk = pn_sock_get_idx(seq, 0);
509 else
510 sk = pn_sock_get_next(seq, v);
511 (*pos)++;
512 return sk;
513}
514
515static void pn_sock_seq_stop(struct seq_file *seq, void *v)
516 __releases(pnsocks.lock)
517{
518 spin_unlock_bh(&pnsocks.lock);
519}
520
521static int pn_sock_seq_show(struct seq_file *seq, void *v)
522{
523 int len;
524
525 if (v == SEQ_START_TOKEN)
526 seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue "
527 " uid inode ref pointer drops", &len);
528 else {
529 struct sock *sk = v;
530 struct pn_sock *pn = pn_sk(sk);
531
532 seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
533 "%d %p %d%n",
534 sk->sk_protocol, pn->sobject, 0, pn->resource,
535 sk->sk_state,
536 sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
537 sock_i_uid(sk), sock_i_ino(sk),
538 atomic_read(&sk->sk_refcnt), sk,
539 atomic_read(&sk->sk_drops), &len);
540 }
541 seq_printf(seq, "%*s\n", 127 - len, "");
542 return 0;
543}
544
545static const struct seq_operations pn_sock_seq_ops = {
546 .start = pn_sock_seq_start,
547 .next = pn_sock_seq_next,
548 .stop = pn_sock_seq_stop,
549 .show = pn_sock_seq_show,
550};
551
552static int pn_sock_open(struct inode *inode, struct file *file)
553{
Rémi Denis-Courmontcb7d9e7f2009-08-11 03:12:07 +0000554 return seq_open_net(inode, file, &pn_sock_seq_ops,
555 sizeof(struct seq_net_private));
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000556}
557
558const struct file_operations pn_sock_seq_fops = {
559 .owner = THIS_MODULE,
560 .open = pn_sock_open,
561 .read = seq_read,
562 .llseek = seq_lseek,
Rémi Denis-Courmontcb7d9e7f2009-08-11 03:12:07 +0000563 .release = seq_release_net,
Rémi Denis-Courmontc1dc13e2009-07-21 01:57:57 +0000564};
Randy Dunlapae6e2ae2009-08-17 10:35:49 +0000565#endif