Commit | Line | Data |
---|---|---|
ba113a94 RDC |
1 | /* |
2 | * File: socket.c | |
3 | * | |
4 | * Phonet sockets | |
5 | * | |
6 | * Copyright (C) 2008 Nokia Corporation. | |
7 | * | |
31fdc555 RDC |
8 | * Authors: Sakari Ailus <sakari.ailus@nokia.com> |
9 | * Rémi Denis-Courmont | |
ba113a94 RDC |
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> |
174cd4b1 IM |
30 | #include <linux/sched/signal.h> |
31 | ||
ba113a94 RDC |
32 | #include <net/sock.h> |
33 | #include <net/tcp_states.h> | |
34 | ||
35 | #include <linux/phonet.h> | |
bc3b2d7f | 36 | #include <linux/export.h> |
ba113a94 | 37 | #include <net/phonet/phonet.h> |
9995a32b | 38 | #include <net/phonet/pep.h> |
ba113a94 RDC |
39 | #include <net/phonet/pn_dev.h> |
40 | ||
41 | static int pn_socket_release(struct socket *sock) | |
42 | { | |
43 | struct sock *sk = sock->sk; | |
44 | ||
45 | if (sk) { | |
46 | sock->sk = NULL; | |
47 | sk->sk_prot->close(sk, 0); | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
6b0d07ba RDC |
52 | #define PN_HASHSIZE 16 |
53 | #define PN_HASHMASK (PN_HASHSIZE-1) | |
54 | ||
55 | ||
ba113a94 | 56 | static struct { |
6b0d07ba | 57 | struct hlist_head hlist[PN_HASHSIZE]; |
44f4d5a2 | 58 | struct mutex lock; |
6b0d07ba RDC |
59 | } pnsocks; |
60 | ||
61 | void __init pn_sock_init(void) | |
62 | { | |
95c96174 | 63 | unsigned int i; |
6b0d07ba RDC |
64 | |
65 | for (i = 0; i < PN_HASHSIZE; i++) | |
66 | INIT_HLIST_HEAD(pnsocks.hlist + i); | |
44f4d5a2 | 67 | mutex_init(&pnsocks.lock); |
6b0d07ba RDC |
68 | } |
69 | ||
70 | static struct hlist_head *pn_hash_list(u16 obj) | |
71 | { | |
72 | return pnsocks.hlist + (obj & PN_HASHMASK); | |
73 | } | |
ba113a94 RDC |
74 | |
75 | /* | |
76 | * Find address based on socket address, match only certain fields. | |
77 | * Also grab sock if it was found. Remember to sock_put it later. | |
78 | */ | |
52404881 | 79 | struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn) |
ba113a94 | 80 | { |
ba113a94 RDC |
81 | struct sock *sknode; |
82 | struct sock *rval = NULL; | |
83 | u16 obj = pn_sockaddr_get_object(spn); | |
84 | u8 res = spn->spn_resource; | |
6b0d07ba | 85 | struct hlist_head *hlist = pn_hash_list(obj); |
ba113a94 | 86 | |
44f4d5a2 | 87 | rcu_read_lock(); |
b67bfe0d | 88 | sk_for_each_rcu(sknode, hlist) { |
ba113a94 RDC |
89 | struct pn_sock *pn = pn_sk(sknode); |
90 | BUG_ON(!pn->sobject); /* unbound socket */ | |
91 | ||
52404881 RDC |
92 | if (!net_eq(sock_net(sknode), net)) |
93 | continue; | |
ba113a94 RDC |
94 | if (pn_port(obj)) { |
95 | /* Look up socket by port */ | |
96 | if (pn_port(pn->sobject) != pn_port(obj)) | |
97 | continue; | |
98 | } else { | |
99 | /* If port is zero, look up by resource */ | |
100 | if (pn->resource != res) | |
101 | continue; | |
102 | } | |
f64f9e71 JP |
103 | if (pn_addr(pn->sobject) && |
104 | pn_addr(pn->sobject) != pn_addr(obj)) | |
ba113a94 RDC |
105 | continue; |
106 | ||
107 | rval = sknode; | |
108 | sock_hold(sknode); | |
109 | break; | |
110 | } | |
44f4d5a2 | 111 | rcu_read_unlock(); |
ba113a94 RDC |
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 | 119 | struct hlist_head *hlist = pnsocks.hlist; |
95c96174 | 120 | unsigned int h; |
f14001fc | 121 | |
44f4d5a2 | 122 | rcu_read_lock(); |
6b0d07ba | 123 | for (h = 0; h < PN_HASHSIZE; h++) { |
6b0d07ba | 124 | struct sock *sknode; |
f14001fc | 125 | |
b67bfe0d | 126 | sk_for_each(sknode, hlist) { |
6b0d07ba | 127 | struct sk_buff *clone; |
ba113a94 | 128 | |
6b0d07ba RDC |
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 | } | |
21912d1c | 139 | } |
6b0d07ba | 140 | hlist++; |
f14001fc | 141 | } |
44f4d5a2 | 142 | rcu_read_unlock(); |
ba113a94 RDC |
143 | } |
144 | ||
086c653f | 145 | int pn_sock_hash(struct sock *sk) |
ba113a94 | 146 | { |
6b0d07ba RDC |
147 | struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject); |
148 | ||
44f4d5a2 RDC |
149 | mutex_lock(&pnsocks.lock); |
150 | sk_add_node_rcu(sk, hlist); | |
151 | mutex_unlock(&pnsocks.lock); | |
086c653f CG |
152 | |
153 | return 0; | |
ba113a94 RDC |
154 | } |
155 | EXPORT_SYMBOL(pn_sock_hash); | |
156 | ||
157 | void pn_sock_unhash(struct sock *sk) | |
158 | { | |
44f4d5a2 RDC |
159 | mutex_lock(&pnsocks.lock); |
160 | sk_del_node_init_rcu(sk); | |
161 | mutex_unlock(&pnsocks.lock); | |
7417fa83 | 162 | pn_sock_unbind_all_res(sk); |
44f4d5a2 | 163 | synchronize_rcu(); |
ba113a94 RDC |
164 | } |
165 | EXPORT_SYMBOL(pn_sock_unhash); | |
166 | ||
582b0b61 RDC |
167 | static DEFINE_MUTEX(port_mutex); |
168 | ||
ba113a94 RDC |
169 | static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len) |
170 | { | |
171 | struct sock *sk = sock->sk; | |
172 | struct pn_sock *pn = pn_sk(sk); | |
173 | struct sockaddr_pn *spn = (struct sockaddr_pn *)addr; | |
174 | int err; | |
175 | u16 handle; | |
176 | u8 saddr; | |
177 | ||
178 | if (sk->sk_prot->bind) | |
179 | return sk->sk_prot->bind(sk, addr, len); | |
180 | ||
181 | if (len < sizeof(struct sockaddr_pn)) | |
182 | return -EINVAL; | |
183 | if (spn->spn_family != AF_PHONET) | |
184 | return -EAFNOSUPPORT; | |
185 | ||
186 | handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr); | |
187 | saddr = pn_addr(handle); | |
52404881 | 188 | if (saddr && phonet_address_lookup(sock_net(sk), saddr)) |
ba113a94 RDC |
189 | return -EADDRNOTAVAIL; |
190 | ||
191 | lock_sock(sk); | |
192 | if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) { | |
193 | err = -EINVAL; /* attempt to rebind */ | |
194 | goto out; | |
195 | } | |
582b0b61 RDC |
196 | WARN_ON(sk_hashed(sk)); |
197 | mutex_lock(&port_mutex); | |
ba113a94 RDC |
198 | err = sk->sk_prot->get_port(sk, pn_port(handle)); |
199 | if (err) | |
582b0b61 | 200 | goto out_port; |
ba113a94 RDC |
201 | |
202 | /* get_port() sets the port, bind() sets the address if applicable */ | |
203 | pn->sobject = pn_object(saddr, pn_port(pn->sobject)); | |
204 | pn->resource = spn->spn_resource; | |
205 | ||
206 | /* Enable RX on the socket */ | |
086c653f | 207 | err = sk->sk_prot->hash(sk); |
582b0b61 RDC |
208 | out_port: |
209 | mutex_unlock(&port_mutex); | |
ba113a94 RDC |
210 | out: |
211 | release_sock(sk); | |
212 | return err; | |
213 | } | |
214 | ||
215 | static int pn_socket_autobind(struct socket *sock) | |
216 | { | |
217 | struct sockaddr_pn sa; | |
218 | int err; | |
219 | ||
220 | memset(&sa, 0, sizeof(sa)); | |
221 | sa.spn_family = AF_PHONET; | |
222 | err = pn_socket_bind(sock, (struct sockaddr *)&sa, | |
223 | sizeof(struct sockaddr_pn)); | |
224 | if (err != -EINVAL) | |
225 | return err; | |
226 | BUG_ON(!pn_port(pn_sk(sock->sk)->sobject)); | |
227 | return 0; /* socket was already bound */ | |
228 | } | |
229 | ||
b3d62553 KS |
230 | static int pn_socket_connect(struct socket *sock, struct sockaddr *addr, |
231 | int len, int flags) | |
232 | { | |
233 | struct sock *sk = sock->sk; | |
297edb60 | 234 | struct pn_sock *pn = pn_sk(sk); |
b3d62553 | 235 | struct sockaddr_pn *spn = (struct sockaddr_pn *)addr; |
297edb60 RDC |
236 | struct task_struct *tsk = current; |
237 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
b3d62553 KS |
238 | int err; |
239 | ||
297edb60 RDC |
240 | if (pn_socket_autobind(sock)) |
241 | return -ENOBUFS; | |
b3d62553 KS |
242 | if (len < sizeof(struct sockaddr_pn)) |
243 | return -EINVAL; | |
244 | if (spn->spn_family != AF_PHONET) | |
245 | return -EAFNOSUPPORT; | |
246 | ||
247 | lock_sock(sk); | |
248 | ||
249 | switch (sock->state) { | |
250 | case SS_UNCONNECTED: | |
297edb60 | 251 | if (sk->sk_state != TCP_CLOSE) { |
b3d62553 KS |
252 | err = -EISCONN; |
253 | goto out; | |
b3d62553 KS |
254 | } |
255 | break; | |
297edb60 RDC |
256 | case SS_CONNECTING: |
257 | err = -EALREADY; | |
258 | goto out; | |
259 | default: | |
260 | err = -EISCONN; | |
261 | goto out; | |
b3d62553 | 262 | } |
b3d62553 | 263 | |
297edb60 RDC |
264 | pn->dobject = pn_sockaddr_get_object(spn); |
265 | pn->resource = pn_sockaddr_get_resource(spn); | |
b3d62553 | 266 | sock->state = SS_CONNECTING; |
297edb60 | 267 | |
b3d62553 | 268 | err = sk->sk_prot->connect(sk, addr, len); |
297edb60 | 269 | if (err) { |
b3d62553 | 270 | sock->state = SS_UNCONNECTED; |
297edb60 | 271 | pn->dobject = 0; |
b3d62553 KS |
272 | goto out; |
273 | } | |
274 | ||
297edb60 RDC |
275 | while (sk->sk_state == TCP_SYN_SENT) { |
276 | DEFINE_WAIT(wait); | |
b3d62553 | 277 | |
297edb60 RDC |
278 | if (!timeo) { |
279 | err = -EINPROGRESS; | |
280 | goto out; | |
281 | } | |
282 | if (signal_pending(tsk)) { | |
283 | err = sock_intr_errno(timeo); | |
284 | goto out; | |
285 | } | |
b3d62553 | 286 | |
297edb60 RDC |
287 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
288 | TASK_INTERRUPTIBLE); | |
289 | release_sock(sk); | |
290 | timeo = schedule_timeout(timeo); | |
291 | lock_sock(sk); | |
292 | finish_wait(sk_sleep(sk), &wait); | |
b3d62553 | 293 | } |
b3d62553 | 294 | |
297edb60 RDC |
295 | if ((1 << sk->sk_state) & (TCPF_SYN_RECV|TCPF_ESTABLISHED)) |
296 | err = 0; | |
297 | else if (sk->sk_state == TCP_CLOSE_WAIT) | |
298 | err = -ECONNRESET; | |
299 | else | |
300 | err = -ECONNREFUSED; | |
301 | sock->state = err ? SS_UNCONNECTED : SS_CONNECTED; | |
b3d62553 KS |
302 | out: |
303 | release_sock(sk); | |
304 | return err; | |
305 | } | |
b3d62553 | 306 | |
9995a32b RDC |
307 | static int pn_socket_accept(struct socket *sock, struct socket *newsock, |
308 | int flags) | |
309 | { | |
310 | struct sock *sk = sock->sk; | |
311 | struct sock *newsk; | |
312 | int err; | |
313 | ||
f7ae8d59 RDC |
314 | if (unlikely(sk->sk_state != TCP_LISTEN)) |
315 | return -EINVAL; | |
316 | ||
9995a32b RDC |
317 | newsk = sk->sk_prot->accept(sk, flags, &err); |
318 | if (!newsk) | |
319 | return err; | |
320 | ||
321 | lock_sock(newsk); | |
322 | sock_graft(newsk, newsock); | |
323 | newsock->state = SS_CONNECTED; | |
324 | release_sock(newsk); | |
325 | return 0; | |
326 | } | |
327 | ||
ba113a94 RDC |
328 | static int pn_socket_getname(struct socket *sock, struct sockaddr *addr, |
329 | int *sockaddr_len, int peer) | |
330 | { | |
331 | struct sock *sk = sock->sk; | |
332 | struct pn_sock *pn = pn_sk(sk); | |
333 | ||
334 | memset(addr, 0, sizeof(struct sockaddr_pn)); | |
335 | addr->sa_family = AF_PHONET; | |
336 | if (!peer) /* Race with bind() here is userland's problem. */ | |
337 | pn_sockaddr_set_object((struct sockaddr_pn *)addr, | |
338 | pn->sobject); | |
339 | ||
340 | *sockaddr_len = sizeof(struct sockaddr_pn); | |
341 | return 0; | |
342 | } | |
343 | ||
9995a32b RDC |
344 | static unsigned int pn_socket_poll(struct file *file, struct socket *sock, |
345 | poll_table *wait) | |
346 | { | |
347 | struct sock *sk = sock->sk; | |
348 | struct pep_sock *pn = pep_sk(sk); | |
349 | unsigned int mask = 0; | |
350 | ||
43815482 | 351 | poll_wait(file, sk_sleep(sk), wait); |
9995a32b | 352 | |
f7ae8d59 | 353 | if (sk->sk_state == TCP_CLOSE) |
9995a32b | 354 | return POLLERR; |
9995a32b RDC |
355 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
356 | mask |= POLLIN | POLLRDNORM; | |
c41bd97f RDC |
357 | if (!skb_queue_empty(&pn->ctrlreq_queue)) |
358 | mask |= POLLPRI; | |
359 | if (!mask && sk->sk_state == TCP_CLOSE_WAIT) | |
9995a32b RDC |
360 | return POLLHUP; |
361 | ||
01b38606 RDC |
362 | if (sk->sk_state == TCP_ESTABLISHED && |
363 | atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf && | |
364 | atomic_read(&pn->tx_credits)) | |
9995a32b RDC |
365 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
366 | ||
367 | return mask; | |
368 | } | |
369 | ||
ba113a94 RDC |
370 | static int pn_socket_ioctl(struct socket *sock, unsigned int cmd, |
371 | unsigned long arg) | |
372 | { | |
373 | struct sock *sk = sock->sk; | |
374 | struct pn_sock *pn = pn_sk(sk); | |
375 | ||
376 | if (cmd == SIOCPNGETOBJECT) { | |
377 | struct net_device *dev; | |
378 | u16 handle; | |
379 | u8 saddr; | |
380 | ||
381 | if (get_user(handle, (__u16 __user *)arg)) | |
382 | return -EFAULT; | |
383 | ||
384 | lock_sock(sk); | |
385 | if (sk->sk_bound_dev_if) | |
386 | dev = dev_get_by_index(sock_net(sk), | |
387 | sk->sk_bound_dev_if); | |
388 | else | |
389 | dev = phonet_device_get(sock_net(sk)); | |
390 | if (dev && (dev->flags & IFF_UP)) | |
391 | saddr = phonet_address_get(dev, pn_addr(handle)); | |
392 | else | |
393 | saddr = PN_NO_ADDR; | |
394 | release_sock(sk); | |
395 | ||
396 | if (dev) | |
397 | dev_put(dev); | |
398 | if (saddr == PN_NO_ADDR) | |
399 | return -EHOSTUNREACH; | |
400 | ||
401 | handle = pn_object(saddr, pn_port(pn->sobject)); | |
402 | return put_user(handle, (__u16 __user *)arg); | |
403 | } | |
404 | ||
405 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
406 | } | |
407 | ||
9995a32b RDC |
408 | static int pn_socket_listen(struct socket *sock, int backlog) |
409 | { | |
410 | struct sock *sk = sock->sk; | |
411 | int err = 0; | |
412 | ||
9995a32b RDC |
413 | if (pn_socket_autobind(sock)) |
414 | return -ENOBUFS; | |
415 | ||
416 | lock_sock(sk); | |
96241544 | 417 | if (sock->state != SS_UNCONNECTED) { |
9995a32b RDC |
418 | err = -EINVAL; |
419 | goto out; | |
420 | } | |
421 | ||
96241544 RDC |
422 | if (sk->sk_state != TCP_LISTEN) { |
423 | sk->sk_state = TCP_LISTEN; | |
424 | sk->sk_ack_backlog = 0; | |
425 | } | |
9995a32b RDC |
426 | sk->sk_max_ack_backlog = backlog; |
427 | out: | |
428 | release_sock(sk); | |
429 | return err; | |
430 | } | |
431 | ||
1b784140 YX |
432 | static int pn_socket_sendmsg(struct socket *sock, struct msghdr *m, |
433 | size_t total_len) | |
ba113a94 RDC |
434 | { |
435 | struct sock *sk = sock->sk; | |
436 | ||
437 | if (pn_socket_autobind(sock)) | |
438 | return -EAGAIN; | |
439 | ||
1b784140 | 440 | return sk->sk_prot->sendmsg(sk, m, total_len); |
ba113a94 RDC |
441 | } |
442 | ||
443 | const struct proto_ops phonet_dgram_ops = { | |
444 | .family = AF_PHONET, | |
445 | .owner = THIS_MODULE, | |
446 | .release = pn_socket_release, | |
447 | .bind = pn_socket_bind, | |
448 | .connect = sock_no_connect, | |
449 | .socketpair = sock_no_socketpair, | |
450 | .accept = sock_no_accept, | |
451 | .getname = pn_socket_getname, | |
452 | .poll = datagram_poll, | |
453 | .ioctl = pn_socket_ioctl, | |
454 | .listen = sock_no_listen, | |
455 | .shutdown = sock_no_shutdown, | |
456 | .setsockopt = sock_no_setsockopt, | |
457 | .getsockopt = sock_no_getsockopt, | |
458 | #ifdef CONFIG_COMPAT | |
459 | .compat_setsockopt = sock_no_setsockopt, | |
460 | .compat_getsockopt = sock_no_getsockopt, | |
461 | #endif | |
462 | .sendmsg = pn_socket_sendmsg, | |
463 | .recvmsg = sock_common_recvmsg, | |
464 | .mmap = sock_no_mmap, | |
465 | .sendpage = sock_no_sendpage, | |
466 | }; | |
467 | ||
9995a32b RDC |
468 | const struct proto_ops phonet_stream_ops = { |
469 | .family = AF_PHONET, | |
470 | .owner = THIS_MODULE, | |
471 | .release = pn_socket_release, | |
472 | .bind = pn_socket_bind, | |
b3d62553 | 473 | .connect = pn_socket_connect, |
9995a32b RDC |
474 | .socketpair = sock_no_socketpair, |
475 | .accept = pn_socket_accept, | |
476 | .getname = pn_socket_getname, | |
477 | .poll = pn_socket_poll, | |
478 | .ioctl = pn_socket_ioctl, | |
479 | .listen = pn_socket_listen, | |
480 | .shutdown = sock_no_shutdown, | |
02a47617 RDC |
481 | .setsockopt = sock_common_setsockopt, |
482 | .getsockopt = sock_common_getsockopt, | |
9995a32b | 483 | #ifdef CONFIG_COMPAT |
02a47617 RDC |
484 | .compat_setsockopt = compat_sock_common_setsockopt, |
485 | .compat_getsockopt = compat_sock_common_getsockopt, | |
9995a32b RDC |
486 | #endif |
487 | .sendmsg = pn_socket_sendmsg, | |
488 | .recvmsg = sock_common_recvmsg, | |
489 | .mmap = sock_no_mmap, | |
490 | .sendpage = sock_no_sendpage, | |
491 | }; | |
492 | EXPORT_SYMBOL(phonet_stream_ops); | |
493 | ||
ba113a94 RDC |
494 | /* allocate port for a socket */ |
495 | int pn_sock_get_port(struct sock *sk, unsigned short sport) | |
496 | { | |
497 | static int port_cur; | |
52404881 | 498 | struct net *net = sock_net(sk); |
ba113a94 RDC |
499 | struct pn_sock *pn = pn_sk(sk); |
500 | struct sockaddr_pn try_sa; | |
501 | struct sock *tmpsk; | |
502 | ||
503 | memset(&try_sa, 0, sizeof(struct sockaddr_pn)); | |
504 | try_sa.spn_family = AF_PHONET; | |
582b0b61 | 505 | WARN_ON(!mutex_is_locked(&port_mutex)); |
ba113a94 RDC |
506 | if (!sport) { |
507 | /* search free port */ | |
87ab4e20 | 508 | int port, pmin, pmax; |
ba113a94 | 509 | |
87ab4e20 | 510 | phonet_get_local_port_range(&pmin, &pmax); |
ba113a94 RDC |
511 | for (port = pmin; port <= pmax; port++) { |
512 | port_cur++; | |
513 | if (port_cur < pmin || port_cur > pmax) | |
514 | port_cur = pmin; | |
515 | ||
516 | pn_sockaddr_set_port(&try_sa, port_cur); | |
52404881 | 517 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
518 | if (tmpsk == NULL) { |
519 | sport = port_cur; | |
520 | goto found; | |
521 | } else | |
522 | sock_put(tmpsk); | |
523 | } | |
524 | } else { | |
525 | /* try to find specific port */ | |
526 | pn_sockaddr_set_port(&try_sa, sport); | |
52404881 | 527 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
528 | if (tmpsk == NULL) |
529 | /* No sock there! We can use that port... */ | |
530 | goto found; | |
531 | else | |
532 | sock_put(tmpsk); | |
533 | } | |
ba113a94 RDC |
534 | /* the port must be in use already */ |
535 | return -EADDRINUSE; | |
536 | ||
537 | found: | |
ba113a94 RDC |
538 | pn->sobject = pn_object(pn_addr(pn->sobject), sport); |
539 | return 0; | |
540 | } | |
541 | EXPORT_SYMBOL(pn_sock_get_port); | |
c1dc13e9 | 542 | |
ae6e2aef | 543 | #ifdef CONFIG_PROC_FS |
c1dc13e9 RDC |
544 | static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos) |
545 | { | |
546 | struct net *net = seq_file_net(seq); | |
6b0d07ba | 547 | struct hlist_head *hlist = pnsocks.hlist; |
c1dc13e9 | 548 | struct sock *sknode; |
95c96174 | 549 | unsigned int h; |
c1dc13e9 | 550 | |
6b0d07ba | 551 | for (h = 0; h < PN_HASHSIZE; h++) { |
b67bfe0d | 552 | sk_for_each_rcu(sknode, hlist) { |
6b0d07ba RDC |
553 | if (!net_eq(net, sock_net(sknode))) |
554 | continue; | |
555 | if (!pos) | |
556 | return sknode; | |
557 | pos--; | |
558 | } | |
559 | hlist++; | |
c1dc13e9 RDC |
560 | } |
561 | return NULL; | |
562 | } | |
563 | ||
564 | static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk) | |
565 | { | |
566 | struct net *net = seq_file_net(seq); | |
567 | ||
568 | do | |
569 | sk = sk_next(sk); | |
570 | while (sk && !net_eq(net, sock_net(sk))); | |
571 | ||
572 | return sk; | |
573 | } | |
574 | ||
575 | static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos) | |
44f4d5a2 | 576 | __acquires(rcu) |
c1dc13e9 | 577 | { |
44f4d5a2 | 578 | rcu_read_lock(); |
c1dc13e9 RDC |
579 | return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
580 | } | |
581 | ||
582 | static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
583 | { | |
584 | struct sock *sk; | |
585 | ||
586 | if (v == SEQ_START_TOKEN) | |
587 | sk = pn_sock_get_idx(seq, 0); | |
588 | else | |
589 | sk = pn_sock_get_next(seq, v); | |
590 | (*pos)++; | |
591 | return sk; | |
592 | } | |
593 | ||
594 | static void pn_sock_seq_stop(struct seq_file *seq, void *v) | |
44f4d5a2 | 595 | __releases(rcu) |
c1dc13e9 | 596 | { |
44f4d5a2 | 597 | rcu_read_unlock(); |
c1dc13e9 RDC |
598 | } |
599 | ||
600 | static int pn_sock_seq_show(struct seq_file *seq, void *v) | |
601 | { | |
652586df | 602 | seq_setwidth(seq, 127); |
c1dc13e9 | 603 | if (v == SEQ_START_TOKEN) |
652586df TH |
604 | seq_puts(seq, "pt loc rem rs st tx_queue rx_queue " |
605 | " uid inode ref pointer drops"); | |
c1dc13e9 RDC |
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 " | |
652586df | 611 | "%d %pK %d", |
a8059512 RDC |
612 | sk->sk_protocol, pn->sobject, pn->dobject, |
613 | pn->resource, sk->sk_state, | |
c1dc13e9 | 614 | sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), |
a7cb5a49 EB |
615 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), |
616 | sock_i_ino(sk), | |
c1dc13e9 | 617 | atomic_read(&sk->sk_refcnt), sk, |
652586df | 618 | atomic_read(&sk->sk_drops)); |
c1dc13e9 | 619 | } |
652586df | 620 | seq_pad(seq, '\n'); |
c1dc13e9 RDC |
621 | return 0; |
622 | } | |
623 | ||
624 | static const struct seq_operations pn_sock_seq_ops = { | |
625 | .start = pn_sock_seq_start, | |
626 | .next = pn_sock_seq_next, | |
627 | .stop = pn_sock_seq_stop, | |
628 | .show = pn_sock_seq_show, | |
629 | }; | |
630 | ||
631 | static int pn_sock_open(struct inode *inode, struct file *file) | |
632 | { | |
cb7d9e7f RDC |
633 | return seq_open_net(inode, file, &pn_sock_seq_ops, |
634 | sizeof(struct seq_net_private)); | |
c1dc13e9 RDC |
635 | } |
636 | ||
637 | const struct file_operations pn_sock_seq_fops = { | |
638 | .owner = THIS_MODULE, | |
639 | .open = pn_sock_open, | |
640 | .read = seq_read, | |
641 | .llseek = seq_lseek, | |
cb7d9e7f | 642 | .release = seq_release_net, |
c1dc13e9 | 643 | }; |
ae6e2aef | 644 | #endif |
4e3d16ce RDC |
645 | |
646 | static struct { | |
647 | struct sock *sk[256]; | |
648 | } pnres; | |
649 | ||
650 | /* | |
651 | * Find and hold socket based on resource. | |
652 | */ | |
653 | struct sock *pn_find_sock_by_res(struct net *net, u8 res) | |
654 | { | |
655 | struct sock *sk; | |
656 | ||
657 | if (!net_eq(net, &init_net)) | |
658 | return NULL; | |
659 | ||
660 | rcu_read_lock(); | |
661 | sk = rcu_dereference(pnres.sk[res]); | |
662 | if (sk) | |
663 | sock_hold(sk); | |
664 | rcu_read_unlock(); | |
665 | return sk; | |
666 | } | |
667 | ||
668 | static DEFINE_MUTEX(resource_mutex); | |
669 | ||
670 | int pn_sock_bind_res(struct sock *sk, u8 res) | |
671 | { | |
672 | int ret = -EADDRINUSE; | |
673 | ||
674 | if (!net_eq(sock_net(sk), &init_net)) | |
675 | return -ENOIOCTLCMD; | |
676 | if (!capable(CAP_SYS_ADMIN)) | |
677 | return -EPERM; | |
678 | if (pn_socket_autobind(sk->sk_socket)) | |
679 | return -EAGAIN; | |
680 | ||
681 | mutex_lock(&resource_mutex); | |
682 | if (pnres.sk[res] == NULL) { | |
683 | sock_hold(sk); | |
cf778b00 | 684 | rcu_assign_pointer(pnres.sk[res], sk); |
4e3d16ce RDC |
685 | ret = 0; |
686 | } | |
687 | mutex_unlock(&resource_mutex); | |
688 | return ret; | |
689 | } | |
690 | ||
691 | int pn_sock_unbind_res(struct sock *sk, u8 res) | |
692 | { | |
693 | int ret = -ENOENT; | |
694 | ||
695 | if (!capable(CAP_SYS_ADMIN)) | |
696 | return -EPERM; | |
697 | ||
698 | mutex_lock(&resource_mutex); | |
699 | if (pnres.sk[res] == sk) { | |
a9b3cd7f | 700 | RCU_INIT_POINTER(pnres.sk[res], NULL); |
4e3d16ce RDC |
701 | ret = 0; |
702 | } | |
703 | mutex_unlock(&resource_mutex); | |
704 | ||
705 | if (ret == 0) { | |
706 | synchronize_rcu(); | |
707 | sock_put(sk); | |
708 | } | |
709 | return ret; | |
710 | } | |
711 | ||
712 | void pn_sock_unbind_all_res(struct sock *sk) | |
713 | { | |
95c96174 | 714 | unsigned int res, match = 0; |
4e3d16ce RDC |
715 | |
716 | mutex_lock(&resource_mutex); | |
717 | for (res = 0; res < 256; res++) { | |
718 | if (pnres.sk[res] == sk) { | |
a9b3cd7f | 719 | RCU_INIT_POINTER(pnres.sk[res], NULL); |
4e3d16ce RDC |
720 | match++; |
721 | } | |
722 | } | |
723 | mutex_unlock(&resource_mutex); | |
724 | ||
4e3d16ce | 725 | while (match > 0) { |
44f4d5a2 | 726 | __sock_put(sk); |
4e3d16ce RDC |
727 | match--; |
728 | } | |
44f4d5a2 | 729 | /* Caller is responsible for RCU sync before final sock_put() */ |
4e3d16ce | 730 | } |
507215f8 RDC |
731 | |
732 | #ifdef CONFIG_PROC_FS | |
733 | static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos) | |
734 | { | |
735 | struct net *net = seq_file_net(seq); | |
95c96174 | 736 | unsigned int i; |
507215f8 RDC |
737 | |
738 | if (!net_eq(net, &init_net)) | |
739 | return NULL; | |
740 | ||
741 | for (i = 0; i < 256; i++) { | |
742 | if (pnres.sk[i] == NULL) | |
743 | continue; | |
744 | if (!pos) | |
745 | return pnres.sk + i; | |
746 | pos--; | |
747 | } | |
748 | return NULL; | |
749 | } | |
750 | ||
751 | static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk) | |
752 | { | |
753 | struct net *net = seq_file_net(seq); | |
95c96174 | 754 | unsigned int i; |
507215f8 RDC |
755 | |
756 | BUG_ON(!net_eq(net, &init_net)); | |
757 | ||
758 | for (i = (sk - pnres.sk) + 1; i < 256; i++) | |
759 | if (pnres.sk[i]) | |
760 | return pnres.sk + i; | |
761 | return NULL; | |
762 | } | |
763 | ||
764 | static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos) | |
765 | __acquires(resource_mutex) | |
766 | { | |
767 | mutex_lock(&resource_mutex); | |
768 | return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
769 | } | |
770 | ||
771 | static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
772 | { | |
773 | struct sock **sk; | |
774 | ||
775 | if (v == SEQ_START_TOKEN) | |
776 | sk = pn_res_get_idx(seq, 0); | |
777 | else | |
778 | sk = pn_res_get_next(seq, v); | |
779 | (*pos)++; | |
780 | return sk; | |
781 | } | |
782 | ||
783 | static void pn_res_seq_stop(struct seq_file *seq, void *v) | |
784 | __releases(resource_mutex) | |
785 | { | |
786 | mutex_unlock(&resource_mutex); | |
787 | } | |
788 | ||
789 | static int pn_res_seq_show(struct seq_file *seq, void *v) | |
790 | { | |
652586df | 791 | seq_setwidth(seq, 63); |
507215f8 | 792 | if (v == SEQ_START_TOKEN) |
652586df | 793 | seq_puts(seq, "rs uid inode"); |
507215f8 RDC |
794 | else { |
795 | struct sock **psk = v; | |
796 | struct sock *sk = *psk; | |
797 | ||
652586df | 798 | seq_printf(seq, "%02X %5u %lu", |
a7cb5a49 EB |
799 | (int) (psk - pnres.sk), |
800 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), | |
652586df | 801 | sock_i_ino(sk)); |
507215f8 | 802 | } |
652586df | 803 | seq_pad(seq, '\n'); |
507215f8 RDC |
804 | return 0; |
805 | } | |
806 | ||
807 | static const struct seq_operations pn_res_seq_ops = { | |
808 | .start = pn_res_seq_start, | |
809 | .next = pn_res_seq_next, | |
810 | .stop = pn_res_seq_stop, | |
811 | .show = pn_res_seq_show, | |
812 | }; | |
813 | ||
814 | static int pn_res_open(struct inode *inode, struct file *file) | |
815 | { | |
816 | return seq_open_net(inode, file, &pn_res_seq_ops, | |
817 | sizeof(struct seq_net_private)); | |
818 | } | |
819 | ||
820 | const struct file_operations pn_res_seq_fops = { | |
821 | .owner = THIS_MODULE, | |
822 | .open = pn_res_open, | |
823 | .read = seq_read, | |
824 | .llseek = seq_lseek, | |
825 | .release = seq_release_net, | |
826 | }; | |
827 | #endif |