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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>
32
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>
38
39static int pn_socket_release(struct socket *sock)
40{
41 struct sock *sk = sock->sk;
42
43 if (sk) {
44 sock->sk = NULL;
45 sk->sk_prot->close(sk, 0);
46 }
47 return 0;
48}
49
50#define PN_HASHSIZE 16
51#define PN_HASHMASK (PN_HASHSIZE-1)
52
53
54static struct {
55 struct hlist_head hlist[PN_HASHSIZE];
56 struct mutex lock;
57} pnsocks;
58
59void __init pn_sock_init(void)
60{
61 unsigned int i;
62
63 for (i = 0; i < PN_HASHSIZE; i++)
64 INIT_HLIST_HEAD(pnsocks.hlist + i);
65 mutex_init(&pnsocks.lock);
66}
67
68static struct hlist_head *pn_hash_list(u16 obj)
69{
70 return pnsocks.hlist + (obj & PN_HASHMASK);
71}
72
73
74
75
76
77struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn)
78{
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);
85
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);
90
91 if (!net_eq(sock_net(sknode), net))
92 continue;
93 if (pn_port(obj)) {
94
95 if (pn_port(pn->sobject) != pn_port(obj))
96 continue;
97 } else {
98
99 if (pn->resource != res)
100 continue;
101 }
102 if (pn_addr(pn->sobject) &&
103 pn_addr(pn->sobject) != pn_addr(obj))
104 continue;
105
106 rval = sknode;
107 sock_hold(sknode);
108 break;
109 }
110 rcu_read_unlock();
111
112 return rval;
113}
114
115
116void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb)
117{
118 struct hlist_head *hlist = pnsocks.hlist;
119 unsigned int h;
120
121 rcu_read_lock();
122 for (h = 0; h < PN_HASHSIZE; h++) {
123 struct hlist_node *node;
124 struct sock *sknode;
125
126 sk_for_each(sknode, node, hlist) {
127 struct sk_buff *clone;
128
129 if (!net_eq(sock_net(sknode), net))
130 continue;
131 if (!sock_flag(sknode, SOCK_BROADCAST))
132 continue;
133
134 clone = skb_clone(skb, GFP_ATOMIC);
135 if (clone) {
136 sock_hold(sknode);
137 sk_receive_skb(sknode, clone, 0);
138 }
139 }
140 hlist++;
141 }
142 rcu_read_unlock();
143}
144
145void pn_sock_hash(struct sock *sk)
146{
147 struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject);
148
149 mutex_lock(&pnsocks.lock);
150 sk_add_node_rcu(sk, hlist);
151 mutex_unlock(&pnsocks.lock);
152}
153EXPORT_SYMBOL(pn_sock_hash);
154
155void pn_sock_unhash(struct sock *sk)
156{
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();
162}
163EXPORT_SYMBOL(pn_sock_unhash);
164
165static DEFINE_MUTEX(port_mutex);
166
167static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
168{
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;
175
176 if (sk->sk_prot->bind)
177 return sk->sk_prot->bind(sk, addr, len);
178
179 if (len < sizeof(struct sockaddr_pn))
180 return -EINVAL;
181 if (spn->spn_family != AF_PHONET)
182 return -EAFNOSUPPORT;
183
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;
188
189 lock_sock(sk);
190 if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) {
191 err = -EINVAL;
192 goto out;
193 }
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;
199
200
201 pn->sobject = pn_object(saddr, pn_port(pn->sobject));
202 pn->resource = spn->spn_resource;
203
204
205 sk->sk_prot->hash(sk);
206out_port:
207 mutex_unlock(&port_mutex);
208out:
209 release_sock(sk);
210 return err;
211}
212
213static int pn_socket_autobind(struct socket *sock)
214{
215 struct sockaddr_pn sa;
216 int err;
217
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;
226}
227
228static int pn_socket_connect(struct socket *sock, struct sockaddr *addr,
229 int len, int flags)
230{
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;
237
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;
244
245 lock_sock(sk);
246
247 switch (sock->state) {
248 case SS_UNCONNECTED:
249 if (sk->sk_state != TCP_CLOSE) {
250 err = -EISCONN;
251 goto out;
252 }
253 break;
254 case SS_CONNECTING:
255 err = -EALREADY;
256 goto out;
257 default:
258 err = -EISCONN;
259 goto out;
260 }
261
262 pn->dobject = pn_sockaddr_get_object(spn);
263 pn->resource = pn_sockaddr_get_resource(spn);
264 sock->state = SS_CONNECTING;
265
266 err = sk->sk_prot->connect(sk, addr, len);
267 if (err) {
268 sock->state = SS_UNCONNECTED;
269 pn->dobject = 0;
270 goto out;
271 }
272
273 while (sk->sk_state == TCP_SYN_SENT) {
274 DEFINE_WAIT(wait);
275
276 if (!timeo) {
277 err = -EINPROGRESS;
278 goto out;
279 }
280 if (signal_pending(tsk)) {
281 err = sock_intr_errno(timeo);
282 goto out;
283 }
284
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);
291 }
292
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;
300out:
301 release_sock(sk);
302 return err;
303}
304
305static int pn_socket_accept(struct socket *sock, struct socket *newsock,
306 int flags)
307{
308 struct sock *sk = sock->sk;
309 struct sock *newsk;
310 int err;
311
312 if (unlikely(sk->sk_state != TCP_LISTEN))
313 return -EINVAL;
314
315 newsk = sk->sk_prot->accept(sk, flags, &err);
316 if (!newsk)
317 return err;
318
319 lock_sock(newsk);
320 sock_graft(newsk, newsock);
321 newsock->state = SS_CONNECTED;
322 release_sock(newsk);
323 return 0;
324}
325
326static int pn_socket_getname(struct socket *sock, struct sockaddr *addr,
327 int *sockaddr_len, int peer)
328{
329 struct sock *sk = sock->sk;
330 struct pn_sock *pn = pn_sk(sk);
331
332 memset(addr, 0, sizeof(struct sockaddr_pn));
333 addr->sa_family = AF_PHONET;
334 if (!peer)
335 pn_sockaddr_set_object((struct sockaddr_pn *)addr,
336 pn->sobject);
337
338 *sockaddr_len = sizeof(struct sockaddr_pn);
339 return 0;
340}
341
342static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
343 poll_table *wait)
344{
345 struct sock *sk = sock->sk;
346 struct pep_sock *pn = pep_sk(sk);
347 unsigned int mask = 0;
348
349 poll_wait(file, sk_sleep(sk), wait);
350
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;
359
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;
364
365 return mask;
366}
367
368static int pn_socket_ioctl(struct socket *sock, unsigned int cmd,
369 unsigned long arg)
370{
371 struct sock *sk = sock->sk;
372 struct pn_sock *pn = pn_sk(sk);
373
374 if (cmd == SIOCPNGETOBJECT) {
375 struct net_device *dev;
376 u16 handle;
377 u8 saddr;
378
379 if (get_user(handle, (__u16 __user *)arg))
380 return -EFAULT;
381
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);
393
394 if (dev)
395 dev_put(dev);
396 if (saddr == PN_NO_ADDR)
397 return -EHOSTUNREACH;
398
399 handle = pn_object(saddr, pn_port(pn->sobject));
400 return put_user(handle, (__u16 __user *)arg);
401 }
402
403 return sk->sk_prot->ioctl(sk, cmd, arg);
404}
405
406static int pn_socket_listen(struct socket *sock, int backlog)
407{
408 struct sock *sk = sock->sk;
409 int err = 0;
410
411 if (pn_socket_autobind(sock))
412 return -ENOBUFS;
413
414 lock_sock(sk);
415 if (sock->state != SS_UNCONNECTED) {
416 err = -EINVAL;
417 goto out;
418 }
419
420 if (sk->sk_state != TCP_LISTEN) {
421 sk->sk_state = TCP_LISTEN;
422 sk->sk_ack_backlog = 0;
423 }
424 sk->sk_max_ack_backlog = backlog;
425out:
426 release_sock(sk);
427 return err;
428}
429
430static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock,
431 struct msghdr *m, size_t total_len)
432{
433 struct sock *sk = sock->sk;
434
435 if (pn_socket_autobind(sock))
436 return -EAGAIN;
437
438 return sk->sk_prot->sendmsg(iocb, sk, m, total_len);
439}
440
441const 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,
464};
465
466const 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,
489};
490EXPORT_SYMBOL(phonet_stream_ops);
491
492
493int pn_sock_get_port(struct sock *sk, unsigned short sport)
494{
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;
500
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
506 int port, pmin, pmax;
507
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;
513
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);
521 }
522 } else {
523
524 pn_sockaddr_set_port(&try_sa, sport);
525 tmpsk = pn_find_sock_by_sa(net, &try_sa);
526 if (tmpsk == NULL)
527
528 goto found;
529 else
530 sock_put(tmpsk);
531 }
532
533 return -EADDRINUSE;
534
535found:
536 pn->sobject = pn_object(pn_addr(pn->sobject), sport);
537 return 0;
538}
539EXPORT_SYMBOL(pn_sock_get_port);
540
541#ifdef CONFIG_PROC_FS
542static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
543{
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 int h;
549
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--;
557 }
558 hlist++;
559 }
560 return NULL;
561}
562
563static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk)
564{
565 struct net *net = seq_file_net(seq);
566
567 do
568 sk = sk_next(sk);
569 while (sk && !net_eq(net, sock_net(sk)));
570
571 return sk;
572}
573
574static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos)
575 __acquires(rcu)
576{
577 rcu_read_lock();
578 return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
579}
580
581static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos)
582{
583 struct sock *sk;
584
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;
591}
592
593static void pn_sock_seq_stop(struct seq_file *seq, void *v)
594 __releases(rcu)
595{
596 rcu_read_unlock();
597}
598
599static int pn_sock_seq_show(struct seq_file *seq, void *v)
600{
601 int len;
602
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);
609
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);
618 }
619 seq_printf(seq, "%*s\n", 127 - len, "");
620 return 0;
621}
622
623static 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,
628};
629
630static int pn_sock_open(struct inode *inode, struct file *file)
631{
632 return seq_open_net(inode, file, &pn_sock_seq_ops,
633 sizeof(struct seq_net_private));
634}
635
636const 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,
642};
643#endif
644
645static struct {
646 struct sock *sk[256];
647} pnres;
648
649
650
651
652struct sock *pn_find_sock_by_res(struct net *net, u8 res)
653{
654 struct sock *sk;
655
656 if (!net_eq(net, &init_net))
657 return NULL;
658
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;
665}
666
667static DEFINE_MUTEX(resource_mutex);
668
669int pn_sock_bind_res(struct sock *sk, u8 res)
670{
671 int ret = -EADDRINUSE;
672
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;
679
680 mutex_lock(&resource_mutex);
681 if (pnres.sk[res] == NULL) {
682 sock_hold(sk);
683 rcu_assign_pointer(pnres.sk[res], sk);
684 ret = 0;
685 }
686 mutex_unlock(&resource_mutex);
687 return ret;
688}
689
690int pn_sock_unbind_res(struct sock *sk, u8 res)
691{
692 int ret = -ENOENT;
693
694 if (!capable(CAP_SYS_ADMIN))
695 return -EPERM;
696
697 mutex_lock(&resource_mutex);
698 if (pnres.sk[res] == sk) {
699 RCU_INIT_POINTER(pnres.sk[res], NULL);
700 ret = 0;
701 }
702 mutex_unlock(&resource_mutex);
703
704 if (ret == 0) {
705 synchronize_rcu();
706 sock_put(sk);
707 }
708 return ret;
709}
710
711void pn_sock_unbind_all_res(struct sock *sk)
712{
713 unsigned int res, match = 0;
714
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++;
720 }
721 }
722 mutex_unlock(&resource_mutex);
723
724 while (match > 0) {
725 __sock_put(sk);
726 match--;
727 }
728
729}
730
731#ifdef CONFIG_PROC_FS
732static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos)
733{
734 struct net *net = seq_file_net(seq);
735 unsigned int i;
736
737 if (!net_eq(net, &init_net))
738 return NULL;
739
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--;
746 }
747 return NULL;
748}
749
750static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk)
751{
752 struct net *net = seq_file_net(seq);
753 unsigned int i;
754
755 BUG_ON(!net_eq(net, &init_net));
756
757 for (i = (sk - pnres.sk) + 1; i < 256; i++)
758 if (pnres.sk[i])
759 return pnres.sk + i;
760 return NULL;
761}
762
763static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos)
764 __acquires(resource_mutex)
765{
766 mutex_lock(&resource_mutex);
767 return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
768}
769
770static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos)
771{
772 struct sock **sk;
773
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;
780}
781
782static void pn_res_seq_stop(struct seq_file *seq, void *v)
783 __releases(resource_mutex)
784{
785 mutex_unlock(&resource_mutex);
786}
787
788static int pn_res_seq_show(struct seq_file *seq, void *v)
789{
790 int len;
791
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;
797
798 seq_printf(seq, "%02X %5d %lu%n",
799 (int) (psk - pnres.sk), sock_i_uid(sk),
800 sock_i_ino(sk), &len);
801 }
802 seq_printf(seq, "%*s\n", 63 - len, "");
803 return 0;
804}
805
806static 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,
811};
812
813static int pn_res_open(struct inode *inode, struct file *file)
814{
815 return seq_open_net(inode, file, &pn_res_seq_ops,
816 sizeof(struct seq_net_private));
817}
818
819const 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,
825};
826#endif
827
