powerpc/83xx: merge PCI bridge additions
[linux/fpc-iii.git] / net / phonet / socket.c
blob3f8d0b1603b98f5c1c2ad5105b6a3226c27df1f3
1 /*
2 * File: socket.c
4 * Phonet sockets
6 * Copyright (C) 2008 Nokia Corporation.
8 * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
9 * Original author: Sakari Ailus <sakari.ailus@nokia.com>
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.
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.
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
26 #include <linux/gfp.h>
27 #include <linux/kernel.h>
28 #include <linux/net.h>
29 #include <linux/poll.h>
30 #include <net/sock.h>
31 #include <net/tcp_states.h>
33 #include <linux/phonet.h>
34 #include <linux/export.h>
35 #include <net/phonet/phonet.h>
36 #include <net/phonet/pep.h>
37 #include <net/phonet/pn_dev.h>
39 static int pn_socket_release(struct socket *sock)
41 struct sock *sk = sock->sk;
43 if (sk) {
44 sock->sk = NULL;
45 sk->sk_prot->close(sk, 0);
47 return 0;
50 #define PN_HASHSIZE 16
51 #define PN_HASHMASK (PN_HASHSIZE-1)
54 static struct {
55 struct hlist_head hlist[PN_HASHSIZE];
56 struct mutex lock;
57 } pnsocks;
59 void __init pn_sock_init(void)
61 unsigned i;
63 for (i = 0; i < PN_HASHSIZE; i++)
64 INIT_HLIST_HEAD(pnsocks.hlist + i);
65 mutex_init(&pnsocks.lock);
68 static struct hlist_head *pn_hash_list(u16 obj)
70 return pnsocks.hlist + (obj & PN_HASHMASK);
74 * Find address based on socket address, match only certain fields.
75 * Also grab sock if it was found. Remember to sock_put it later.
77 struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn)
79 struct hlist_node *node;
80 struct sock *sknode;
81 struct sock *rval = NULL;
82 u16 obj = pn_sockaddr_get_object(spn);
83 u8 res = spn->spn_resource;
84 struct hlist_head *hlist = pn_hash_list(obj);
86 rcu_read_lock();
87 sk_for_each_rcu(sknode, node, hlist) {
88 struct pn_sock *pn = pn_sk(sknode);
89 BUG_ON(!pn->sobject); /* unbound socket */
91 if (!net_eq(sock_net(sknode), net))
92 continue;
93 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;
102 if (pn_addr(pn->sobject) &&
103 pn_addr(pn->sobject) != pn_addr(obj))
104 continue;
106 rval = sknode;
107 sock_hold(sknode);
108 break;
110 rcu_read_unlock();
112 return rval;
115 /* Deliver a broadcast packet (only in bottom-half) */
116 void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb)
118 struct hlist_head *hlist = pnsocks.hlist;
119 unsigned h;
121 rcu_read_lock();
122 for (h = 0; h < PN_HASHSIZE; h++) {
123 struct hlist_node *node;
124 struct sock *sknode;
126 sk_for_each(sknode, node, hlist) {
127 struct sk_buff *clone;
129 if (!net_eq(sock_net(sknode), net))
130 continue;
131 if (!sock_flag(sknode, SOCK_BROADCAST))
132 continue;
134 clone = skb_clone(skb, GFP_ATOMIC);
135 if (clone) {
136 sock_hold(sknode);
137 sk_receive_skb(sknode, clone, 0);
140 hlist++;
142 rcu_read_unlock();
145 void pn_sock_hash(struct sock *sk)
147 struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject);
149 mutex_lock(&pnsocks.lock);
150 sk_add_node_rcu(sk, hlist);
151 mutex_unlock(&pnsocks.lock);
153 EXPORT_SYMBOL(pn_sock_hash);
155 void pn_sock_unhash(struct sock *sk)
157 mutex_lock(&pnsocks.lock);
158 sk_del_node_init_rcu(sk);
159 mutex_unlock(&pnsocks.lock);
160 pn_sock_unbind_all_res(sk);
161 synchronize_rcu();
163 EXPORT_SYMBOL(pn_sock_unhash);
165 static DEFINE_MUTEX(port_mutex);
167 static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
169 struct sock *sk = sock->sk;
170 struct pn_sock *pn = pn_sk(sk);
171 struct sockaddr_pn *spn = (struct sockaddr_pn *)addr;
172 int err;
173 u16 handle;
174 u8 saddr;
176 if (sk->sk_prot->bind)
177 return sk->sk_prot->bind(sk, addr, len);
179 if (len < sizeof(struct sockaddr_pn))
180 return -EINVAL;
181 if (spn->spn_family != AF_PHONET)
182 return -EAFNOSUPPORT;
184 handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr);
185 saddr = pn_addr(handle);
186 if (saddr && phonet_address_lookup(sock_net(sk), saddr))
187 return -EADDRNOTAVAIL;
189 lock_sock(sk);
190 if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) {
191 err = -EINVAL; /* attempt to rebind */
192 goto out;
194 WARN_ON(sk_hashed(sk));
195 mutex_lock(&port_mutex);
196 err = sk->sk_prot->get_port(sk, pn_port(handle));
197 if (err)
198 goto out_port;
200 /* get_port() sets the port, bind() sets the address if applicable */
201 pn->sobject = pn_object(saddr, pn_port(pn->sobject));
202 pn->resource = spn->spn_resource;
204 /* Enable RX on the socket */
205 sk->sk_prot->hash(sk);
206 out_port:
207 mutex_unlock(&port_mutex);
208 out:
209 release_sock(sk);
210 return err;
213 static int pn_socket_autobind(struct socket *sock)
215 struct sockaddr_pn sa;
216 int err;
218 memset(&sa, 0, sizeof(sa));
219 sa.spn_family = AF_PHONET;
220 err = pn_socket_bind(sock, (struct sockaddr *)&sa,
221 sizeof(struct sockaddr_pn));
222 if (err != -EINVAL)
223 return err;
224 BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));
225 return 0; /* socket was already bound */
228 static int pn_socket_connect(struct socket *sock, struct sockaddr *addr,
229 int len, int flags)
231 struct sock *sk = sock->sk;
232 struct pn_sock *pn = pn_sk(sk);
233 struct sockaddr_pn *spn = (struct sockaddr_pn *)addr;
234 struct task_struct *tsk = current;
235 long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
236 int err;
238 if (pn_socket_autobind(sock))
239 return -ENOBUFS;
240 if (len < sizeof(struct sockaddr_pn))
241 return -EINVAL;
242 if (spn->spn_family != AF_PHONET)
243 return -EAFNOSUPPORT;
245 lock_sock(sk);
247 switch (sock->state) {
248 case SS_UNCONNECTED:
249 if (sk->sk_state != TCP_CLOSE) {
250 err = -EISCONN;
251 goto out;
253 break;
254 case SS_CONNECTING:
255 err = -EALREADY;
256 goto out;
257 default:
258 err = -EISCONN;
259 goto out;
262 pn->dobject = pn_sockaddr_get_object(spn);
263 pn->resource = pn_sockaddr_get_resource(spn);
264 sock->state = SS_CONNECTING;
266 err = sk->sk_prot->connect(sk, addr, len);
267 if (err) {
268 sock->state = SS_UNCONNECTED;
269 pn->dobject = 0;
270 goto out;
273 while (sk->sk_state == TCP_SYN_SENT) {
274 DEFINE_WAIT(wait);
276 if (!timeo) {
277 err = -EINPROGRESS;
278 goto out;
280 if (signal_pending(tsk)) {
281 err = sock_intr_errno(timeo);
282 goto out;
285 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
286 TASK_INTERRUPTIBLE);
287 release_sock(sk);
288 timeo = schedule_timeout(timeo);
289 lock_sock(sk);
290 finish_wait(sk_sleep(sk), &wait);
293 if ((1 << sk->sk_state) & (TCPF_SYN_RECV|TCPF_ESTABLISHED))
294 err = 0;
295 else if (sk->sk_state == TCP_CLOSE_WAIT)
296 err = -ECONNRESET;
297 else
298 err = -ECONNREFUSED;
299 sock->state = err ? SS_UNCONNECTED : SS_CONNECTED;
300 out:
301 release_sock(sk);
302 return err;
305 static int pn_socket_accept(struct socket *sock, struct socket *newsock,
306 int flags)
308 struct sock *sk = sock->sk;
309 struct sock *newsk;
310 int err;
312 if (unlikely(sk->sk_state != TCP_LISTEN))
313 return -EINVAL;
315 newsk = sk->sk_prot->accept(sk, flags, &err);
316 if (!newsk)
317 return err;
319 lock_sock(newsk);
320 sock_graft(newsk, newsock);
321 newsock->state = SS_CONNECTED;
322 release_sock(newsk);
323 return 0;
326 static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
327 int *sockaddr_len, int peer)
329 struct sock *sk = sock->sk;
330 struct pn_sock *pn = pn_sk(sk);
332 memset(addr, 0, sizeof(struct sockaddr_pn));
333 addr->sa_family = AF_PHONET;
334 if (!peer) /* Race with bind() here is userland's problem. */
335 pn_sockaddr_set_object((struct sockaddr_pn *)addr,
336 pn->sobject);
338 *sockaddr_len = sizeof(struct sockaddr_pn);
339 return 0;
342 static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
343 poll_table *wait)
345 struct sock *sk = sock->sk;
346 struct pep_sock *pn = pep_sk(sk);
347 unsigned int mask = 0;
349 poll_wait(file, sk_sleep(sk), wait);
351 if (sk->sk_state == TCP_CLOSE)
352 return POLLERR;
353 if (!skb_queue_empty(&sk->sk_receive_queue))
354 mask |= POLLIN | POLLRDNORM;
355 if (!skb_queue_empty(&pn->ctrlreq_queue))
356 mask |= POLLPRI;
357 if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
358 return POLLHUP;
360 if (sk->sk_state == TCP_ESTABLISHED &&
361 atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf &&
362 atomic_read(&pn->tx_credits))
363 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
365 return mask;
368 static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
369 unsigned long arg)
371 struct sock *sk = sock->sk;
372 struct pn_sock *pn = pn_sk(sk);
374 if (cmd == SIOCPNGETOBJECT) {
375 struct net_device *dev;
376 u16 handle;
377 u8 saddr;
379 if (get_user(handle, (__u16 __user *)arg))
380 return -EFAULT;
382 lock_sock(sk);
383 if (sk->sk_bound_dev_if)
384 dev = dev_get_by_index(sock_net(sk),
385 sk->sk_bound_dev_if);
386 else
387 dev = phonet_device_get(sock_net(sk));
388 if (dev && (dev->flags & IFF_UP))
389 saddr = phonet_address_get(dev, pn_addr(handle));
390 else
391 saddr = PN_NO_ADDR;
392 release_sock(sk);
394 if (dev)
395 dev_put(dev);
396 if (saddr == PN_NO_ADDR)
397 return -EHOSTUNREACH;
399 handle = pn_object(saddr, pn_port(pn->sobject));
400 return put_user(handle, (__u16 __user *)arg);
403 return sk->sk_prot->ioctl(sk, cmd, arg);
406 static int pn_socket_listen(struct socket *sock, int backlog)
408 struct sock *sk = sock->sk;
409 int err = 0;
411 if (pn_socket_autobind(sock))
412 return -ENOBUFS;
414 lock_sock(sk);
415 if (sock->state != SS_UNCONNECTED) {
416 err = -EINVAL;
417 goto out;
420 if (sk->sk_state != TCP_LISTEN) {
421 sk->sk_state = TCP_LISTEN;
422 sk->sk_ack_backlog = 0;
424 sk->sk_max_ack_backlog = backlog;
425 out:
426 release_sock(sk);
427 return err;
430 static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
431 struct msghdr *m, size_t total_len)
433 struct sock *sk = sock->sk;
435 if (pn_socket_autobind(sock))
436 return -EAGAIN;
438 return sk->sk_prot->sendmsg(iocb, sk, m, total_len);
441 const struct proto_ops phonet_dgram_ops = {
442 .family = AF_PHONET,
443 .owner = THIS_MODULE,
444 .release = pn_socket_release,
445 .bind = pn_socket_bind,
446 .connect = sock_no_connect,
447 .socketpair = sock_no_socketpair,
448 .accept = sock_no_accept,
449 .getname = pn_socket_getname,
450 .poll = datagram_poll,
451 .ioctl = pn_socket_ioctl,
452 .listen = sock_no_listen,
453 .shutdown = sock_no_shutdown,
454 .setsockopt = sock_no_setsockopt,
455 .getsockopt = sock_no_getsockopt,
456 #ifdef CONFIG_COMPAT
457 .compat_setsockopt = sock_no_setsockopt,
458 .compat_getsockopt = sock_no_getsockopt,
459 #endif
460 .sendmsg = pn_socket_sendmsg,
461 .recvmsg = sock_common_recvmsg,
462 .mmap = sock_no_mmap,
463 .sendpage = sock_no_sendpage,
466 const struct proto_ops phonet_stream_ops = {
467 .family = AF_PHONET,
468 .owner = THIS_MODULE,
469 .release = pn_socket_release,
470 .bind = pn_socket_bind,
471 .connect = pn_socket_connect,
472 .socketpair = sock_no_socketpair,
473 .accept = pn_socket_accept,
474 .getname = pn_socket_getname,
475 .poll = pn_socket_poll,
476 .ioctl = pn_socket_ioctl,
477 .listen = pn_socket_listen,
478 .shutdown = sock_no_shutdown,
479 .setsockopt = sock_common_setsockopt,
480 .getsockopt = sock_common_getsockopt,
481 #ifdef CONFIG_COMPAT
482 .compat_setsockopt = compat_sock_common_setsockopt,
483 .compat_getsockopt = compat_sock_common_getsockopt,
484 #endif
485 .sendmsg = pn_socket_sendmsg,
486 .recvmsg = sock_common_recvmsg,
487 .mmap = sock_no_mmap,
488 .sendpage = sock_no_sendpage,
490 EXPORT_SYMBOL(phonet_stream_ops);
492 /* allocate port for a socket */
493 int pn_sock_get_port(struct sock *sk, unsigned short sport)
495 static int port_cur;
496 struct net *net = sock_net(sk);
497 struct pn_sock *pn = pn_sk(sk);
498 struct sockaddr_pn try_sa;
499 struct sock *tmpsk;
501 memset(&try_sa, 0, sizeof(struct sockaddr_pn));
502 try_sa.spn_family = AF_PHONET;
503 WARN_ON(!mutex_is_locked(&port_mutex));
504 if (!sport) {
505 /* search free port */
506 int port, pmin, pmax;
508 phonet_get_local_port_range(&pmin, &pmax);
509 for (port = pmin; port <= pmax; port++) {
510 port_cur++;
511 if (port_cur < pmin || port_cur > pmax)
512 port_cur = pmin;
514 pn_sockaddr_set_port(&try_sa, port_cur);
515 tmpsk = pn_find_sock_by_sa(net, &try_sa);
516 if (tmpsk == NULL) {
517 sport = port_cur;
518 goto found;
519 } else
520 sock_put(tmpsk);
522 } else {
523 /* try to find specific port */
524 pn_sockaddr_set_port(&try_sa, sport);
525 tmpsk = pn_find_sock_by_sa(net, &try_sa);
526 if (tmpsk == NULL)
527 /* No sock there! We can use that port... */
528 goto found;
529 else
530 sock_put(tmpsk);
532 /* the port must be in use already */
533 return -EADDRINUSE;
535 found:
536 pn->sobject = pn_object(pn_addr(pn->sobject), sport);
537 return 0;
539 EXPORT_SYMBOL(pn_sock_get_port);
541 #ifdef CONFIG_PROC_FS
542 static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
544 struct net *net = seq_file_net(seq);
545 struct hlist_head *hlist = pnsocks.hlist;
546 struct hlist_node *node;
547 struct sock *sknode;
548 unsigned h;
550 for (h = 0; h < PN_HASHSIZE; h++) {
551 sk_for_each_rcu(sknode, node, hlist) {
552 if (!net_eq(net, sock_net(sknode)))
553 continue;
554 if (!pos)
555 return sknode;
556 pos--;
558 hlist++;
560 return NULL;
563 static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)
565 struct net *net = seq_file_net(seq);
568 sk = sk_next(sk);
569 while (sk && !net_eq(net, sock_net(sk)));
571 return sk;
574 static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)
575 __acquires(rcu)
577 rcu_read_lock();
578 return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
581 static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)
583 struct sock *sk;
585 if (v == SEQ_START_TOKEN)
586 sk = pn_sock_get_idx(seq, 0);
587 else
588 sk = pn_sock_get_next(seq, v);
589 (*pos)++;
590 return sk;
593 static void pn_sock_seq_stop(struct seq_file *seq, void *v)
594 __releases(rcu)
596 rcu_read_unlock();
599 static int pn_sock_seq_show(struct seq_file *seq, void *v)
601 int len;
603 if (v == SEQ_START_TOKEN)
604 seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue "
605 " uid inode ref pointer drops", &len);
606 else {
607 struct sock *sk = v;
608 struct pn_sock *pn = pn_sk(sk);
610 seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu "
611 "%d %pK %d%n",
612 sk->sk_protocol, pn->sobject, pn->dobject,
613 pn->resource, sk->sk_state,
614 sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
615 sock_i_uid(sk), sock_i_ino(sk),
616 atomic_read(&sk->sk_refcnt), sk,
617 atomic_read(&sk->sk_drops), &len);
619 seq_printf(seq, "%*s\n", 127 - len, "");
620 return 0;
623 static const struct seq_operations pn_sock_seq_ops = {
624 .start = pn_sock_seq_start,
625 .next = pn_sock_seq_next,
626 .stop = pn_sock_seq_stop,
627 .show = pn_sock_seq_show,
630 static int pn_sock_open(struct inode *inode, struct file *file)
632 return seq_open_net(inode, file, &pn_sock_seq_ops,
633 sizeof(struct seq_net_private));
636 const struct file_operations pn_sock_seq_fops = {
637 .owner = THIS_MODULE,
638 .open = pn_sock_open,
639 .read = seq_read,
640 .llseek = seq_lseek,
641 .release = seq_release_net,
643 #endif
645 static struct {
646 struct sock *sk[256];
647 } pnres;
650 * Find and hold socket based on resource.
652 struct sock *pn_find_sock_by_res(struct net *net, u8 res)
654 struct sock *sk;
656 if (!net_eq(net, &init_net))
657 return NULL;
659 rcu_read_lock();
660 sk = rcu_dereference(pnres.sk[res]);
661 if (sk)
662 sock_hold(sk);
663 rcu_read_unlock();
664 return sk;
667 static DEFINE_MUTEX(resource_mutex);
669 int pn_sock_bind_res(struct sock *sk, u8 res)
671 int ret = -EADDRINUSE;
673 if (!net_eq(sock_net(sk), &init_net))
674 return -ENOIOCTLCMD;
675 if (!capable(CAP_SYS_ADMIN))
676 return -EPERM;
677 if (pn_socket_autobind(sk->sk_socket))
678 return -EAGAIN;
680 mutex_lock(&resource_mutex);
681 if (pnres.sk[res] == NULL) {
682 sock_hold(sk);
683 RCU_INIT_POINTER(pnres.sk[res], sk);
684 ret = 0;
686 mutex_unlock(&resource_mutex);
687 return ret;
690 int pn_sock_unbind_res(struct sock *sk, u8 res)
692 int ret = -ENOENT;
694 if (!capable(CAP_SYS_ADMIN))
695 return -EPERM;
697 mutex_lock(&resource_mutex);
698 if (pnres.sk[res] == sk) {
699 RCU_INIT_POINTER(pnres.sk[res], NULL);
700 ret = 0;
702 mutex_unlock(&resource_mutex);
704 if (ret == 0) {
705 synchronize_rcu();
706 sock_put(sk);
708 return ret;
711 void pn_sock_unbind_all_res(struct sock *sk)
713 unsigned res, match = 0;
715 mutex_lock(&resource_mutex);
716 for (res = 0; res < 256; res++) {
717 if (pnres.sk[res] == sk) {
718 RCU_INIT_POINTER(pnres.sk[res], NULL);
719 match++;
722 mutex_unlock(&resource_mutex);
724 while (match > 0) {
725 __sock_put(sk);
726 match--;
728 /* Caller is responsible for RCU sync before final sock_put() */
731 #ifdef CONFIG_PROC_FS
732 static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
734 struct net *net = seq_file_net(seq);
735 unsigned i;
737 if (!net_eq(net, &init_net))
738 return NULL;
740 for (i = 0; i < 256; i++) {
741 if (pnres.sk[i] == NULL)
742 continue;
743 if (!pos)
744 return pnres.sk + i;
745 pos--;
747 return NULL;
750 static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk)
752 struct net *net = seq_file_net(seq);
753 unsigned i;
755 BUG_ON(!net_eq(net, &init_net));
757 for (i = (sk - pnres.sk) + 1; i < 256; i++)
758 if (pnres.sk[i])
759 return pnres.sk + i;
760 return NULL;
763 static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos)
764 __acquires(resource_mutex)
766 mutex_lock(&resource_mutex);
767 return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
770 static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos)
772 struct sock **sk;
774 if (v == SEQ_START_TOKEN)
775 sk = pn_res_get_idx(seq, 0);
776 else
777 sk = pn_res_get_next(seq, v);
778 (*pos)++;
779 return sk;
782 static void pn_res_seq_stop(struct seq_file *seq, void *v)
783 __releases(resource_mutex)
785 mutex_unlock(&resource_mutex);
788 static int pn_res_seq_show(struct seq_file *seq, void *v)
790 int len;
792 if (v == SEQ_START_TOKEN)
793 seq_printf(seq, "%s%n", "rs uid inode", &len);
794 else {
795 struct sock **psk = v;
796 struct sock *sk = *psk;
798 seq_printf(seq, "%02X %5d %lu%n",
799 (int) (psk - pnres.sk), sock_i_uid(sk),
800 sock_i_ino(sk), &len);
802 seq_printf(seq, "%*s\n", 63 - len, "");
803 return 0;
806 static const struct seq_operations pn_res_seq_ops = {
807 .start = pn_res_seq_start,
808 .next = pn_res_seq_next,
809 .stop = pn_res_seq_stop,
810 .show = pn_res_seq_show,
813 static int pn_res_open(struct inode *inode, struct file *file)
815 return seq_open_net(inode, file, &pn_res_seq_ops,
816 sizeof(struct seq_net_private));
819 const struct file_operations pn_res_seq_fops = {
820 .owner = THIS_MODULE,
821 .open = pn_res_open,
822 .read = seq_read,
823 .llseek = seq_lseek,
824 .release = seq_release_net,
826 #endif