Commit | Line | Data |
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ba113a94 RDC |
1 | /* |
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 | ||
5a0e3ad6 | 26 | #include <linux/gfp.h> |
ba113a94 RDC |
27 | #include <linux/kernel.h> |
28 | #include <linux/net.h> | |
9995a32b | 29 | #include <linux/poll.h> |
ba113a94 RDC |
30 | #include <net/sock.h> |
31 | #include <net/tcp_states.h> | |
32 | ||
33 | #include <linux/phonet.h> | |
34 | #include <net/phonet/phonet.h> | |
9995a32b | 35 | #include <net/phonet/pep.h> |
ba113a94 RDC |
36 | #include <net/phonet/pn_dev.h> |
37 | ||
38 | static 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 | ||
6b0d07ba RDC |
49 | #define PN_HASHSIZE 16 |
50 | #define PN_HASHMASK (PN_HASHSIZE-1) | |
51 | ||
52 | ||
ba113a94 | 53 | static struct { |
6b0d07ba | 54 | struct hlist_head hlist[PN_HASHSIZE]; |
ba113a94 | 55 | spinlock_t lock; |
6b0d07ba RDC |
56 | } pnsocks; |
57 | ||
58 | void __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 | ||
67 | static struct hlist_head *pn_hash_list(u16 obj) | |
68 | { | |
69 | return pnsocks.hlist + (obj & PN_HASHMASK); | |
70 | } | |
ba113a94 RDC |
71 | |
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 | */ | |
52404881 | 76 | struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn) |
ba113a94 RDC |
77 | { |
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; | |
6b0d07ba | 83 | struct hlist_head *hlist = pn_hash_list(obj); |
ba113a94 RDC |
84 | |
85 | spin_lock_bh(&pnsocks.lock); | |
86 | ||
6b0d07ba | 87 | sk_for_each(sknode, node, hlist) { |
ba113a94 RDC |
88 | struct pn_sock *pn = pn_sk(sknode); |
89 | BUG_ON(!pn->sobject); /* unbound socket */ | |
90 | ||
52404881 RDC |
91 | if (!net_eq(sock_net(sknode), net)) |
92 | continue; | |
ba113a94 RDC |
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; | |
101 | } | |
f64f9e71 JP |
102 | if (pn_addr(pn->sobject) && |
103 | pn_addr(pn->sobject) != pn_addr(obj)) | |
ba113a94 RDC |
104 | continue; |
105 | ||
106 | rval = sknode; | |
107 | sock_hold(sknode); | |
108 | break; | |
109 | } | |
110 | ||
111 | spin_unlock_bh(&pnsocks.lock); | |
112 | ||
113 | return rval; | |
f14001fc RDC |
114 | } |
115 | ||
116 | /* Deliver a broadcast packet (only in bottom-half) */ | |
117 | void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb) | |
118 | { | |
6b0d07ba RDC |
119 | struct hlist_head *hlist = pnsocks.hlist; |
120 | unsigned h; | |
f14001fc RDC |
121 | |
122 | spin_lock(&pnsocks.lock); | |
6b0d07ba RDC |
123 | for (h = 0; h < PN_HASHSIZE; h++) { |
124 | struct hlist_node *node; | |
125 | struct sock *sknode; | |
f14001fc | 126 | |
6b0d07ba RDC |
127 | sk_for_each(sknode, node, hlist) { |
128 | struct sk_buff *clone; | |
ba113a94 | 129 | |
6b0d07ba RDC |
130 | 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 | } | |
21912d1c | 140 | } |
6b0d07ba | 141 | hlist++; |
f14001fc RDC |
142 | } |
143 | spin_unlock(&pnsocks.lock); | |
ba113a94 RDC |
144 | } |
145 | ||
146 | void pn_sock_hash(struct sock *sk) | |
147 | { | |
6b0d07ba RDC |
148 | struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject); |
149 | ||
ba113a94 | 150 | spin_lock_bh(&pnsocks.lock); |
6b0d07ba | 151 | sk_add_node(sk, hlist); |
ba113a94 RDC |
152 | spin_unlock_bh(&pnsocks.lock); |
153 | } | |
154 | EXPORT_SYMBOL(pn_sock_hash); | |
155 | ||
156 | void 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); | |
7417fa83 | 161 | pn_sock_unbind_all_res(sk); |
ba113a94 RDC |
162 | } |
163 | EXPORT_SYMBOL(pn_sock_unhash); | |
164 | ||
582b0b61 RDC |
165 | static DEFINE_MUTEX(port_mutex); |
166 | ||
ba113a94 RDC |
167 | static 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); | |
52404881 | 186 | if (saddr && phonet_address_lookup(sock_net(sk), saddr)) |
ba113a94 RDC |
187 | return -EADDRNOTAVAIL; |
188 | ||
189 | lock_sock(sk); | |
190 | if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) { | |
191 | err = -EINVAL; /* attempt to rebind */ | |
192 | goto out; | |
193 | } | |
582b0b61 RDC |
194 | WARN_ON(sk_hashed(sk)); |
195 | mutex_lock(&port_mutex); | |
ba113a94 RDC |
196 | err = sk->sk_prot->get_port(sk, pn_port(handle)); |
197 | if (err) | |
582b0b61 | 198 | goto out_port; |
ba113a94 RDC |
199 | |
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; | |
203 | ||
204 | /* Enable RX on the socket */ | |
205 | sk->sk_prot->hash(sk); | |
582b0b61 RDC |
206 | out_port: |
207 | mutex_unlock(&port_mutex); | |
ba113a94 RDC |
208 | out: |
209 | release_sock(sk); | |
210 | return err; | |
211 | } | |
212 | ||
213 | static 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; /* socket was already bound */ | |
226 | } | |
227 | ||
b3d62553 KS |
228 | #ifdef CONFIG_PHONET_PIPECTRLR |
229 | static int pn_socket_connect(struct socket *sock, struct sockaddr *addr, | |
230 | int len, int flags) | |
231 | { | |
232 | struct sock *sk = sock->sk; | |
233 | struct sockaddr_pn *spn = (struct sockaddr_pn *)addr; | |
234 | long timeo; | |
235 | int err; | |
236 | ||
237 | if (len < sizeof(struct sockaddr_pn)) | |
238 | return -EINVAL; | |
239 | if (spn->spn_family != AF_PHONET) | |
240 | return -EAFNOSUPPORT; | |
241 | ||
242 | lock_sock(sk); | |
243 | ||
244 | switch (sock->state) { | |
245 | case SS_UNCONNECTED: | |
246 | sk->sk_state = TCP_CLOSE; | |
247 | break; | |
248 | case SS_CONNECTING: | |
249 | switch (sk->sk_state) { | |
250 | case TCP_SYN_RECV: | |
251 | sock->state = SS_CONNECTED; | |
252 | err = -EISCONN; | |
253 | goto out; | |
254 | case TCP_CLOSE: | |
255 | err = -EALREADY; | |
256 | if (flags & O_NONBLOCK) | |
257 | goto out; | |
258 | goto wait_connect; | |
259 | } | |
260 | break; | |
261 | case SS_CONNECTED: | |
262 | switch (sk->sk_state) { | |
263 | case TCP_SYN_RECV: | |
264 | err = -EISCONN; | |
265 | goto out; | |
266 | case TCP_CLOSE: | |
267 | sock->state = SS_UNCONNECTED; | |
268 | break; | |
269 | } | |
270 | break; | |
271 | case SS_DISCONNECTING: | |
272 | case SS_FREE: | |
273 | break; | |
274 | } | |
275 | sk->sk_state = TCP_CLOSE; | |
276 | sk_stream_kill_queues(sk); | |
277 | ||
278 | sock->state = SS_CONNECTING; | |
279 | err = sk->sk_prot->connect(sk, addr, len); | |
280 | if (err < 0) { | |
281 | sock->state = SS_UNCONNECTED; | |
282 | sk->sk_state = TCP_CLOSE; | |
283 | goto out; | |
284 | } | |
285 | ||
286 | err = -EINPROGRESS; | |
287 | wait_connect: | |
288 | if (sk->sk_state != TCP_SYN_RECV && (flags & O_NONBLOCK)) | |
289 | goto out; | |
290 | ||
291 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
292 | release_sock(sk); | |
293 | ||
294 | err = -ERESTARTSYS; | |
295 | timeo = wait_event_interruptible_timeout(*sk_sleep(sk), | |
296 | sk->sk_state != TCP_CLOSE, | |
297 | timeo); | |
298 | ||
299 | lock_sock(sk); | |
300 | if (timeo < 0) | |
301 | goto out; /* -ERESTARTSYS */ | |
302 | ||
303 | err = -ETIMEDOUT; | |
304 | if (timeo == 0 && sk->sk_state != TCP_SYN_RECV) | |
305 | goto out; | |
306 | ||
307 | if (sk->sk_state != TCP_SYN_RECV) { | |
308 | sock->state = SS_UNCONNECTED; | |
309 | err = sock_error(sk); | |
310 | if (!err) | |
311 | err = -ECONNREFUSED; | |
312 | goto out; | |
313 | } | |
314 | sock->state = SS_CONNECTED; | |
315 | err = 0; | |
316 | ||
317 | out: | |
318 | release_sock(sk); | |
319 | return err; | |
320 | } | |
321 | #endif | |
322 | ||
9995a32b RDC |
323 | static int pn_socket_accept(struct socket *sock, struct socket *newsock, |
324 | int flags) | |
325 | { | |
326 | struct sock *sk = sock->sk; | |
327 | struct sock *newsk; | |
328 | int err; | |
329 | ||
330 | newsk = sk->sk_prot->accept(sk, flags, &err); | |
331 | if (!newsk) | |
332 | return err; | |
333 | ||
334 | lock_sock(newsk); | |
335 | sock_graft(newsk, newsock); | |
336 | newsock->state = SS_CONNECTED; | |
337 | release_sock(newsk); | |
338 | return 0; | |
339 | } | |
340 | ||
ba113a94 RDC |
341 | static int pn_socket_getname(struct socket *sock, struct sockaddr *addr, |
342 | int *sockaddr_len, int peer) | |
343 | { | |
344 | struct sock *sk = sock->sk; | |
345 | struct pn_sock *pn = pn_sk(sk); | |
346 | ||
347 | memset(addr, 0, sizeof(struct sockaddr_pn)); | |
348 | addr->sa_family = AF_PHONET; | |
349 | if (!peer) /* Race with bind() here is userland's problem. */ | |
350 | pn_sockaddr_set_object((struct sockaddr_pn *)addr, | |
351 | pn->sobject); | |
352 | ||
353 | *sockaddr_len = sizeof(struct sockaddr_pn); | |
354 | return 0; | |
355 | } | |
356 | ||
9995a32b RDC |
357 | static unsigned int pn_socket_poll(struct file *file, struct socket *sock, |
358 | poll_table *wait) | |
359 | { | |
360 | struct sock *sk = sock->sk; | |
361 | struct pep_sock *pn = pep_sk(sk); | |
362 | unsigned int mask = 0; | |
363 | ||
43815482 | 364 | poll_wait(file, sk_sleep(sk), wait); |
9995a32b RDC |
365 | |
366 | switch (sk->sk_state) { | |
367 | case TCP_LISTEN: | |
368 | return hlist_empty(&pn->ackq) ? 0 : POLLIN; | |
369 | case TCP_CLOSE: | |
370 | return POLLERR; | |
371 | } | |
372 | ||
373 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
374 | mask |= POLLIN | POLLRDNORM; | |
c41bd97f RDC |
375 | if (!skb_queue_empty(&pn->ctrlreq_queue)) |
376 | mask |= POLLPRI; | |
377 | if (!mask && sk->sk_state == TCP_CLOSE_WAIT) | |
9995a32b RDC |
378 | return POLLHUP; |
379 | ||
01b38606 RDC |
380 | if (sk->sk_state == TCP_ESTABLISHED && |
381 | atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf && | |
382 | atomic_read(&pn->tx_credits)) | |
9995a32b RDC |
383 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
384 | ||
385 | return mask; | |
386 | } | |
387 | ||
ba113a94 RDC |
388 | static int pn_socket_ioctl(struct socket *sock, unsigned int cmd, |
389 | unsigned long arg) | |
390 | { | |
391 | struct sock *sk = sock->sk; | |
392 | struct pn_sock *pn = pn_sk(sk); | |
393 | ||
394 | if (cmd == SIOCPNGETOBJECT) { | |
395 | struct net_device *dev; | |
396 | u16 handle; | |
397 | u8 saddr; | |
398 | ||
399 | if (get_user(handle, (__u16 __user *)arg)) | |
400 | return -EFAULT; | |
401 | ||
402 | lock_sock(sk); | |
403 | if (sk->sk_bound_dev_if) | |
404 | dev = dev_get_by_index(sock_net(sk), | |
405 | sk->sk_bound_dev_if); | |
406 | else | |
407 | dev = phonet_device_get(sock_net(sk)); | |
408 | if (dev && (dev->flags & IFF_UP)) | |
409 | saddr = phonet_address_get(dev, pn_addr(handle)); | |
410 | else | |
411 | saddr = PN_NO_ADDR; | |
412 | release_sock(sk); | |
413 | ||
414 | if (dev) | |
415 | dev_put(dev); | |
416 | if (saddr == PN_NO_ADDR) | |
417 | return -EHOSTUNREACH; | |
418 | ||
419 | handle = pn_object(saddr, pn_port(pn->sobject)); | |
420 | return put_user(handle, (__u16 __user *)arg); | |
421 | } | |
422 | ||
423 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
424 | } | |
425 | ||
9995a32b RDC |
426 | static int pn_socket_listen(struct socket *sock, int backlog) |
427 | { | |
428 | struct sock *sk = sock->sk; | |
429 | int err = 0; | |
430 | ||
431 | if (sock->state != SS_UNCONNECTED) | |
432 | return -EINVAL; | |
433 | if (pn_socket_autobind(sock)) | |
434 | return -ENOBUFS; | |
435 | ||
436 | lock_sock(sk); | |
437 | if (sk->sk_state != TCP_CLOSE) { | |
438 | err = -EINVAL; | |
439 | goto out; | |
440 | } | |
441 | ||
442 | sk->sk_state = TCP_LISTEN; | |
443 | sk->sk_ack_backlog = 0; | |
444 | sk->sk_max_ack_backlog = backlog; | |
445 | out: | |
446 | release_sock(sk); | |
447 | return err; | |
448 | } | |
449 | ||
ba113a94 RDC |
450 | static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock, |
451 | struct msghdr *m, size_t total_len) | |
452 | { | |
453 | struct sock *sk = sock->sk; | |
454 | ||
455 | if (pn_socket_autobind(sock)) | |
456 | return -EAGAIN; | |
457 | ||
458 | return sk->sk_prot->sendmsg(iocb, sk, m, total_len); | |
459 | } | |
460 | ||
461 | const struct proto_ops phonet_dgram_ops = { | |
462 | .family = AF_PHONET, | |
463 | .owner = THIS_MODULE, | |
464 | .release = pn_socket_release, | |
465 | .bind = pn_socket_bind, | |
466 | .connect = sock_no_connect, | |
467 | .socketpair = sock_no_socketpair, | |
468 | .accept = sock_no_accept, | |
469 | .getname = pn_socket_getname, | |
470 | .poll = datagram_poll, | |
471 | .ioctl = pn_socket_ioctl, | |
472 | .listen = sock_no_listen, | |
473 | .shutdown = sock_no_shutdown, | |
474 | .setsockopt = sock_no_setsockopt, | |
475 | .getsockopt = sock_no_getsockopt, | |
476 | #ifdef CONFIG_COMPAT | |
477 | .compat_setsockopt = sock_no_setsockopt, | |
478 | .compat_getsockopt = sock_no_getsockopt, | |
479 | #endif | |
480 | .sendmsg = pn_socket_sendmsg, | |
481 | .recvmsg = sock_common_recvmsg, | |
482 | .mmap = sock_no_mmap, | |
483 | .sendpage = sock_no_sendpage, | |
484 | }; | |
485 | ||
9995a32b RDC |
486 | const struct proto_ops phonet_stream_ops = { |
487 | .family = AF_PHONET, | |
488 | .owner = THIS_MODULE, | |
489 | .release = pn_socket_release, | |
490 | .bind = pn_socket_bind, | |
b3d62553 KS |
491 | #ifdef CONFIG_PHONET_PIPECTRLR |
492 | .connect = pn_socket_connect, | |
493 | #else | |
9995a32b | 494 | .connect = sock_no_connect, |
b3d62553 | 495 | #endif |
9995a32b RDC |
496 | .socketpair = sock_no_socketpair, |
497 | .accept = pn_socket_accept, | |
498 | .getname = pn_socket_getname, | |
499 | .poll = pn_socket_poll, | |
500 | .ioctl = pn_socket_ioctl, | |
501 | .listen = pn_socket_listen, | |
502 | .shutdown = sock_no_shutdown, | |
02a47617 RDC |
503 | .setsockopt = sock_common_setsockopt, |
504 | .getsockopt = sock_common_getsockopt, | |
9995a32b | 505 | #ifdef CONFIG_COMPAT |
02a47617 RDC |
506 | .compat_setsockopt = compat_sock_common_setsockopt, |
507 | .compat_getsockopt = compat_sock_common_getsockopt, | |
9995a32b RDC |
508 | #endif |
509 | .sendmsg = pn_socket_sendmsg, | |
510 | .recvmsg = sock_common_recvmsg, | |
511 | .mmap = sock_no_mmap, | |
512 | .sendpage = sock_no_sendpage, | |
513 | }; | |
514 | EXPORT_SYMBOL(phonet_stream_ops); | |
515 | ||
ba113a94 RDC |
516 | /* allocate port for a socket */ |
517 | int pn_sock_get_port(struct sock *sk, unsigned short sport) | |
518 | { | |
519 | static int port_cur; | |
52404881 | 520 | struct net *net = sock_net(sk); |
ba113a94 RDC |
521 | struct pn_sock *pn = pn_sk(sk); |
522 | struct sockaddr_pn try_sa; | |
523 | struct sock *tmpsk; | |
524 | ||
525 | memset(&try_sa, 0, sizeof(struct sockaddr_pn)); | |
526 | try_sa.spn_family = AF_PHONET; | |
582b0b61 | 527 | WARN_ON(!mutex_is_locked(&port_mutex)); |
ba113a94 RDC |
528 | if (!sport) { |
529 | /* search free port */ | |
87ab4e20 | 530 | int port, pmin, pmax; |
ba113a94 | 531 | |
87ab4e20 | 532 | phonet_get_local_port_range(&pmin, &pmax); |
ba113a94 RDC |
533 | for (port = pmin; port <= pmax; port++) { |
534 | port_cur++; | |
535 | if (port_cur < pmin || port_cur > pmax) | |
536 | port_cur = pmin; | |
537 | ||
538 | pn_sockaddr_set_port(&try_sa, port_cur); | |
52404881 | 539 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
540 | if (tmpsk == NULL) { |
541 | sport = port_cur; | |
542 | goto found; | |
543 | } else | |
544 | sock_put(tmpsk); | |
545 | } | |
546 | } else { | |
547 | /* try to find specific port */ | |
548 | pn_sockaddr_set_port(&try_sa, sport); | |
52404881 | 549 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
550 | if (tmpsk == NULL) |
551 | /* No sock there! We can use that port... */ | |
552 | goto found; | |
553 | else | |
554 | sock_put(tmpsk); | |
555 | } | |
ba113a94 RDC |
556 | /* the port must be in use already */ |
557 | return -EADDRINUSE; | |
558 | ||
559 | found: | |
ba113a94 RDC |
560 | pn->sobject = pn_object(pn_addr(pn->sobject), sport); |
561 | return 0; | |
562 | } | |
563 | EXPORT_SYMBOL(pn_sock_get_port); | |
c1dc13e9 | 564 | |
ae6e2aef | 565 | #ifdef CONFIG_PROC_FS |
c1dc13e9 RDC |
566 | static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos) |
567 | { | |
568 | struct net *net = seq_file_net(seq); | |
6b0d07ba | 569 | struct hlist_head *hlist = pnsocks.hlist; |
c1dc13e9 RDC |
570 | struct hlist_node *node; |
571 | struct sock *sknode; | |
6b0d07ba | 572 | unsigned h; |
c1dc13e9 | 573 | |
6b0d07ba RDC |
574 | for (h = 0; h < PN_HASHSIZE; h++) { |
575 | sk_for_each(sknode, node, hlist) { | |
576 | if (!net_eq(net, sock_net(sknode))) | |
577 | continue; | |
578 | if (!pos) | |
579 | return sknode; | |
580 | pos--; | |
581 | } | |
582 | hlist++; | |
c1dc13e9 RDC |
583 | } |
584 | return NULL; | |
585 | } | |
586 | ||
587 | static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk) | |
588 | { | |
589 | struct net *net = seq_file_net(seq); | |
590 | ||
591 | do | |
592 | sk = sk_next(sk); | |
593 | while (sk && !net_eq(net, sock_net(sk))); | |
594 | ||
595 | return sk; | |
596 | } | |
597 | ||
598 | static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos) | |
599 | __acquires(pnsocks.lock) | |
600 | { | |
601 | spin_lock_bh(&pnsocks.lock); | |
602 | return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
603 | } | |
604 | ||
605 | static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
606 | { | |
607 | struct sock *sk; | |
608 | ||
609 | if (v == SEQ_START_TOKEN) | |
610 | sk = pn_sock_get_idx(seq, 0); | |
611 | else | |
612 | sk = pn_sock_get_next(seq, v); | |
613 | (*pos)++; | |
614 | return sk; | |
615 | } | |
616 | ||
617 | static void pn_sock_seq_stop(struct seq_file *seq, void *v) | |
618 | __releases(pnsocks.lock) | |
619 | { | |
620 | spin_unlock_bh(&pnsocks.lock); | |
621 | } | |
622 | ||
623 | static int pn_sock_seq_show(struct seq_file *seq, void *v) | |
624 | { | |
625 | int len; | |
626 | ||
627 | if (v == SEQ_START_TOKEN) | |
628 | seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue " | |
629 | " uid inode ref pointer drops", &len); | |
630 | else { | |
631 | struct sock *sk = v; | |
632 | struct pn_sock *pn = pn_sk(sk); | |
633 | ||
634 | seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu " | |
635 | "%d %p %d%n", | |
636 | sk->sk_protocol, pn->sobject, 0, pn->resource, | |
637 | sk->sk_state, | |
638 | sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), | |
639 | sock_i_uid(sk), sock_i_ino(sk), | |
640 | atomic_read(&sk->sk_refcnt), sk, | |
641 | atomic_read(&sk->sk_drops), &len); | |
642 | } | |
643 | seq_printf(seq, "%*s\n", 127 - len, ""); | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static const struct seq_operations pn_sock_seq_ops = { | |
648 | .start = pn_sock_seq_start, | |
649 | .next = pn_sock_seq_next, | |
650 | .stop = pn_sock_seq_stop, | |
651 | .show = pn_sock_seq_show, | |
652 | }; | |
653 | ||
654 | static int pn_sock_open(struct inode *inode, struct file *file) | |
655 | { | |
cb7d9e7f RDC |
656 | return seq_open_net(inode, file, &pn_sock_seq_ops, |
657 | sizeof(struct seq_net_private)); | |
c1dc13e9 RDC |
658 | } |
659 | ||
660 | const struct file_operations pn_sock_seq_fops = { | |
661 | .owner = THIS_MODULE, | |
662 | .open = pn_sock_open, | |
663 | .read = seq_read, | |
664 | .llseek = seq_lseek, | |
cb7d9e7f | 665 | .release = seq_release_net, |
c1dc13e9 | 666 | }; |
ae6e2aef | 667 | #endif |
4e3d16ce RDC |
668 | |
669 | static struct { | |
670 | struct sock *sk[256]; | |
671 | } pnres; | |
672 | ||
673 | /* | |
674 | * Find and hold socket based on resource. | |
675 | */ | |
676 | struct sock *pn_find_sock_by_res(struct net *net, u8 res) | |
677 | { | |
678 | struct sock *sk; | |
679 | ||
680 | if (!net_eq(net, &init_net)) | |
681 | return NULL; | |
682 | ||
683 | rcu_read_lock(); | |
684 | sk = rcu_dereference(pnres.sk[res]); | |
685 | if (sk) | |
686 | sock_hold(sk); | |
687 | rcu_read_unlock(); | |
688 | return sk; | |
689 | } | |
690 | ||
691 | static DEFINE_MUTEX(resource_mutex); | |
692 | ||
693 | int pn_sock_bind_res(struct sock *sk, u8 res) | |
694 | { | |
695 | int ret = -EADDRINUSE; | |
696 | ||
697 | if (!net_eq(sock_net(sk), &init_net)) | |
698 | return -ENOIOCTLCMD; | |
699 | if (!capable(CAP_SYS_ADMIN)) | |
700 | return -EPERM; | |
701 | if (pn_socket_autobind(sk->sk_socket)) | |
702 | return -EAGAIN; | |
703 | ||
704 | mutex_lock(&resource_mutex); | |
705 | if (pnres.sk[res] == NULL) { | |
706 | sock_hold(sk); | |
707 | rcu_assign_pointer(pnres.sk[res], sk); | |
708 | ret = 0; | |
709 | } | |
710 | mutex_unlock(&resource_mutex); | |
711 | return ret; | |
712 | } | |
713 | ||
714 | int pn_sock_unbind_res(struct sock *sk, u8 res) | |
715 | { | |
716 | int ret = -ENOENT; | |
717 | ||
718 | if (!capable(CAP_SYS_ADMIN)) | |
719 | return -EPERM; | |
720 | ||
721 | mutex_lock(&resource_mutex); | |
722 | if (pnres.sk[res] == sk) { | |
723 | rcu_assign_pointer(pnres.sk[res], NULL); | |
724 | ret = 0; | |
725 | } | |
726 | mutex_unlock(&resource_mutex); | |
727 | ||
728 | if (ret == 0) { | |
729 | synchronize_rcu(); | |
730 | sock_put(sk); | |
731 | } | |
732 | return ret; | |
733 | } | |
734 | ||
735 | void pn_sock_unbind_all_res(struct sock *sk) | |
736 | { | |
737 | unsigned res, match = 0; | |
738 | ||
739 | mutex_lock(&resource_mutex); | |
740 | for (res = 0; res < 256; res++) { | |
741 | if (pnres.sk[res] == sk) { | |
742 | rcu_assign_pointer(pnres.sk[res], NULL); | |
743 | match++; | |
744 | } | |
745 | } | |
746 | mutex_unlock(&resource_mutex); | |
747 | ||
748 | if (match == 0) | |
749 | return; | |
750 | synchronize_rcu(); | |
751 | while (match > 0) { | |
752 | sock_put(sk); | |
753 | match--; | |
754 | } | |
755 | } | |
507215f8 RDC |
756 | |
757 | #ifdef CONFIG_PROC_FS | |
758 | static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos) | |
759 | { | |
760 | struct net *net = seq_file_net(seq); | |
761 | unsigned i; | |
762 | ||
763 | if (!net_eq(net, &init_net)) | |
764 | return NULL; | |
765 | ||
766 | for (i = 0; i < 256; i++) { | |
767 | if (pnres.sk[i] == NULL) | |
768 | continue; | |
769 | if (!pos) | |
770 | return pnres.sk + i; | |
771 | pos--; | |
772 | } | |
773 | return NULL; | |
774 | } | |
775 | ||
776 | static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk) | |
777 | { | |
778 | struct net *net = seq_file_net(seq); | |
779 | unsigned i; | |
780 | ||
781 | BUG_ON(!net_eq(net, &init_net)); | |
782 | ||
783 | for (i = (sk - pnres.sk) + 1; i < 256; i++) | |
784 | if (pnres.sk[i]) | |
785 | return pnres.sk + i; | |
786 | return NULL; | |
787 | } | |
788 | ||
789 | static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos) | |
790 | __acquires(resource_mutex) | |
791 | { | |
792 | mutex_lock(&resource_mutex); | |
793 | return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
794 | } | |
795 | ||
796 | static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
797 | { | |
798 | struct sock **sk; | |
799 | ||
800 | if (v == SEQ_START_TOKEN) | |
801 | sk = pn_res_get_idx(seq, 0); | |
802 | else | |
803 | sk = pn_res_get_next(seq, v); | |
804 | (*pos)++; | |
805 | return sk; | |
806 | } | |
807 | ||
808 | static void pn_res_seq_stop(struct seq_file *seq, void *v) | |
809 | __releases(resource_mutex) | |
810 | { | |
811 | mutex_unlock(&resource_mutex); | |
812 | } | |
813 | ||
814 | static int pn_res_seq_show(struct seq_file *seq, void *v) | |
815 | { | |
816 | int len; | |
817 | ||
818 | if (v == SEQ_START_TOKEN) | |
819 | seq_printf(seq, "%s%n", "rs uid inode", &len); | |
820 | else { | |
821 | struct sock **psk = v; | |
822 | struct sock *sk = *psk; | |
823 | ||
824 | seq_printf(seq, "%02X %5d %lu%n", | |
9e0064a5 DM |
825 | (int) (psk - pnres.sk), sock_i_uid(sk), |
826 | sock_i_ino(sk), &len); | |
507215f8 RDC |
827 | } |
828 | seq_printf(seq, "%*s\n", 63 - len, ""); | |
829 | return 0; | |
830 | } | |
831 | ||
832 | static const struct seq_operations pn_res_seq_ops = { | |
833 | .start = pn_res_seq_start, | |
834 | .next = pn_res_seq_next, | |
835 | .stop = pn_res_seq_stop, | |
836 | .show = pn_res_seq_show, | |
837 | }; | |
838 | ||
839 | static int pn_res_open(struct inode *inode, struct file *file) | |
840 | { | |
841 | return seq_open_net(inode, file, &pn_res_seq_ops, | |
842 | sizeof(struct seq_net_private)); | |
843 | } | |
844 | ||
845 | const struct file_operations pn_res_seq_fops = { | |
846 | .owner = THIS_MODULE, | |
847 | .open = pn_res_open, | |
848 | .read = seq_read, | |
849 | .llseek = seq_lseek, | |
850 | .release = seq_release_net, | |
851 | }; | |
852 | #endif |