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 | * | |
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 | 307 | static int pn_socket_accept(struct socket *sock, struct socket *newsock, |
cdfbabfb | 308 | int flags, bool kern) |
9995a32b RDC |
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 | ||
cdfbabfb | 317 | newsk = sk->sk_prot->accept(sk, flags, &err, kern); |
9995a32b RDC |
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 | 328 | static int pn_socket_getname(struct socket *sock, struct sockaddr *addr, |
9b2c45d4 | 329 | int peer) |
ba113a94 RDC |
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 | ||
9b2c45d4 | 340 | return sizeof(struct sockaddr_pn); |
ba113a94 RDC |
341 | } |
342 | ||
ade994f4 | 343 | static __poll_t pn_socket_poll(struct file *file, struct socket *sock, |
9995a32b RDC |
344 | poll_table *wait) |
345 | { | |
346 | struct sock *sk = sock->sk; | |
347 | struct pep_sock *pn = pep_sk(sk); | |
ade994f4 | 348 | __poll_t mask = 0; |
9995a32b | 349 | |
43815482 | 350 | poll_wait(file, sk_sleep(sk), wait); |
9995a32b | 351 | |
f7ae8d59 | 352 | if (sk->sk_state == TCP_CLOSE) |
a9a08845 | 353 | return EPOLLERR; |
9995a32b | 354 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
a9a08845 | 355 | mask |= EPOLLIN | EPOLLRDNORM; |
c41bd97f | 356 | if (!skb_queue_empty(&pn->ctrlreq_queue)) |
a9a08845 | 357 | mask |= EPOLLPRI; |
c41bd97f | 358 | if (!mask && sk->sk_state == TCP_CLOSE_WAIT) |
a9a08845 | 359 | return EPOLLHUP; |
9995a32b | 360 | |
01b38606 | 361 | if (sk->sk_state == TCP_ESTABLISHED && |
14afee4b | 362 | refcount_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf && |
01b38606 | 363 | atomic_read(&pn->tx_credits)) |
a9a08845 | 364 | mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND; |
9995a32b RDC |
365 | |
366 | return mask; | |
367 | } | |
368 | ||
ba113a94 RDC |
369 | static int pn_socket_ioctl(struct socket *sock, unsigned int cmd, |
370 | unsigned long arg) | |
371 | { | |
372 | struct sock *sk = sock->sk; | |
373 | struct pn_sock *pn = pn_sk(sk); | |
374 | ||
375 | if (cmd == SIOCPNGETOBJECT) { | |
376 | struct net_device *dev; | |
377 | u16 handle; | |
378 | u8 saddr; | |
379 | ||
380 | if (get_user(handle, (__u16 __user *)arg)) | |
381 | return -EFAULT; | |
382 | ||
383 | lock_sock(sk); | |
384 | if (sk->sk_bound_dev_if) | |
385 | dev = dev_get_by_index(sock_net(sk), | |
386 | sk->sk_bound_dev_if); | |
387 | else | |
388 | dev = phonet_device_get(sock_net(sk)); | |
389 | if (dev && (dev->flags & IFF_UP)) | |
390 | saddr = phonet_address_get(dev, pn_addr(handle)); | |
391 | else | |
392 | saddr = PN_NO_ADDR; | |
393 | release_sock(sk); | |
394 | ||
395 | if (dev) | |
396 | dev_put(dev); | |
397 | if (saddr == PN_NO_ADDR) | |
398 | return -EHOSTUNREACH; | |
399 | ||
400 | handle = pn_object(saddr, pn_port(pn->sobject)); | |
401 | return put_user(handle, (__u16 __user *)arg); | |
402 | } | |
403 | ||
404 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
405 | } | |
406 | ||
9995a32b RDC |
407 | static int pn_socket_listen(struct socket *sock, int backlog) |
408 | { | |
409 | struct sock *sk = sock->sk; | |
410 | int err = 0; | |
411 | ||
9995a32b RDC |
412 | if (pn_socket_autobind(sock)) |
413 | return -ENOBUFS; | |
414 | ||
415 | lock_sock(sk); | |
96241544 | 416 | if (sock->state != SS_UNCONNECTED) { |
9995a32b RDC |
417 | err = -EINVAL; |
418 | goto out; | |
419 | } | |
420 | ||
96241544 RDC |
421 | if (sk->sk_state != TCP_LISTEN) { |
422 | sk->sk_state = TCP_LISTEN; | |
423 | sk->sk_ack_backlog = 0; | |
424 | } | |
9995a32b RDC |
425 | sk->sk_max_ack_backlog = backlog; |
426 | out: | |
427 | release_sock(sk); | |
428 | return err; | |
429 | } | |
430 | ||
1b784140 YX |
431 | static int pn_socket_sendmsg(struct socket *sock, struct msghdr *m, |
432 | size_t total_len) | |
ba113a94 RDC |
433 | { |
434 | struct sock *sk = sock->sk; | |
435 | ||
436 | if (pn_socket_autobind(sock)) | |
437 | return -EAGAIN; | |
438 | ||
1b784140 | 439 | return sk->sk_prot->sendmsg(sk, m, total_len); |
ba113a94 RDC |
440 | } |
441 | ||
442 | const struct proto_ops phonet_dgram_ops = { | |
443 | .family = AF_PHONET, | |
444 | .owner = THIS_MODULE, | |
445 | .release = pn_socket_release, | |
446 | .bind = pn_socket_bind, | |
447 | .connect = sock_no_connect, | |
448 | .socketpair = sock_no_socketpair, | |
449 | .accept = sock_no_accept, | |
450 | .getname = pn_socket_getname, | |
451 | .poll = datagram_poll, | |
452 | .ioctl = pn_socket_ioctl, | |
453 | .listen = sock_no_listen, | |
454 | .shutdown = sock_no_shutdown, | |
455 | .setsockopt = sock_no_setsockopt, | |
456 | .getsockopt = sock_no_getsockopt, | |
457 | #ifdef CONFIG_COMPAT | |
458 | .compat_setsockopt = sock_no_setsockopt, | |
459 | .compat_getsockopt = sock_no_getsockopt, | |
460 | #endif | |
461 | .sendmsg = pn_socket_sendmsg, | |
462 | .recvmsg = sock_common_recvmsg, | |
463 | .mmap = sock_no_mmap, | |
464 | .sendpage = sock_no_sendpage, | |
465 | }; | |
466 | ||
9995a32b RDC |
467 | const struct proto_ops phonet_stream_ops = { |
468 | .family = AF_PHONET, | |
469 | .owner = THIS_MODULE, | |
470 | .release = pn_socket_release, | |
471 | .bind = pn_socket_bind, | |
b3d62553 | 472 | .connect = pn_socket_connect, |
9995a32b RDC |
473 | .socketpair = sock_no_socketpair, |
474 | .accept = pn_socket_accept, | |
475 | .getname = pn_socket_getname, | |
476 | .poll = pn_socket_poll, | |
477 | .ioctl = pn_socket_ioctl, | |
478 | .listen = pn_socket_listen, | |
479 | .shutdown = sock_no_shutdown, | |
02a47617 RDC |
480 | .setsockopt = sock_common_setsockopt, |
481 | .getsockopt = sock_common_getsockopt, | |
9995a32b | 482 | #ifdef CONFIG_COMPAT |
02a47617 RDC |
483 | .compat_setsockopt = compat_sock_common_setsockopt, |
484 | .compat_getsockopt = compat_sock_common_getsockopt, | |
9995a32b RDC |
485 | #endif |
486 | .sendmsg = pn_socket_sendmsg, | |
487 | .recvmsg = sock_common_recvmsg, | |
488 | .mmap = sock_no_mmap, | |
489 | .sendpage = sock_no_sendpage, | |
490 | }; | |
491 | EXPORT_SYMBOL(phonet_stream_ops); | |
492 | ||
ba113a94 RDC |
493 | /* allocate port for a socket */ |
494 | int pn_sock_get_port(struct sock *sk, unsigned short sport) | |
495 | { | |
496 | static int port_cur; | |
52404881 | 497 | struct net *net = sock_net(sk); |
ba113a94 RDC |
498 | struct pn_sock *pn = pn_sk(sk); |
499 | struct sockaddr_pn try_sa; | |
500 | struct sock *tmpsk; | |
501 | ||
502 | memset(&try_sa, 0, sizeof(struct sockaddr_pn)); | |
503 | try_sa.spn_family = AF_PHONET; | |
582b0b61 | 504 | WARN_ON(!mutex_is_locked(&port_mutex)); |
ba113a94 RDC |
505 | if (!sport) { |
506 | /* search free port */ | |
87ab4e20 | 507 | int port, pmin, pmax; |
ba113a94 | 508 | |
87ab4e20 | 509 | phonet_get_local_port_range(&pmin, &pmax); |
ba113a94 RDC |
510 | for (port = pmin; port <= pmax; port++) { |
511 | port_cur++; | |
512 | if (port_cur < pmin || port_cur > pmax) | |
513 | port_cur = pmin; | |
514 | ||
515 | pn_sockaddr_set_port(&try_sa, port_cur); | |
52404881 | 516 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
517 | if (tmpsk == NULL) { |
518 | sport = port_cur; | |
519 | goto found; | |
520 | } else | |
521 | sock_put(tmpsk); | |
522 | } | |
523 | } else { | |
524 | /* try to find specific port */ | |
525 | pn_sockaddr_set_port(&try_sa, sport); | |
52404881 | 526 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
527 | if (tmpsk == NULL) |
528 | /* No sock there! We can use that port... */ | |
529 | goto found; | |
530 | else | |
531 | sock_put(tmpsk); | |
532 | } | |
ba113a94 RDC |
533 | /* the port must be in use already */ |
534 | return -EADDRINUSE; | |
535 | ||
536 | found: | |
ba113a94 RDC |
537 | pn->sobject = pn_object(pn_addr(pn->sobject), sport); |
538 | return 0; | |
539 | } | |
540 | EXPORT_SYMBOL(pn_sock_get_port); | |
c1dc13e9 | 541 | |
ae6e2aef | 542 | #ifdef CONFIG_PROC_FS |
c1dc13e9 RDC |
543 | static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos) |
544 | { | |
545 | struct net *net = seq_file_net(seq); | |
6b0d07ba | 546 | struct hlist_head *hlist = pnsocks.hlist; |
c1dc13e9 | 547 | struct sock *sknode; |
95c96174 | 548 | unsigned int h; |
c1dc13e9 | 549 | |
6b0d07ba | 550 | for (h = 0; h < PN_HASHSIZE; h++) { |
b67bfe0d | 551 | sk_for_each_rcu(sknode, hlist) { |
6b0d07ba RDC |
552 | if (!net_eq(net, sock_net(sknode))) |
553 | continue; | |
554 | if (!pos) | |
555 | return sknode; | |
556 | pos--; | |
557 | } | |
558 | hlist++; | |
c1dc13e9 RDC |
559 | } |
560 | return NULL; | |
561 | } | |
562 | ||
563 | static 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 | ||
574 | static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos) | |
44f4d5a2 | 575 | __acquires(rcu) |
c1dc13e9 | 576 | { |
44f4d5a2 | 577 | rcu_read_lock(); |
c1dc13e9 RDC |
578 | return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
579 | } | |
580 | ||
581 | static 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 | ||
593 | static void pn_sock_seq_stop(struct seq_file *seq, void *v) | |
44f4d5a2 | 594 | __releases(rcu) |
c1dc13e9 | 595 | { |
44f4d5a2 | 596 | rcu_read_unlock(); |
c1dc13e9 RDC |
597 | } |
598 | ||
599 | static int pn_sock_seq_show(struct seq_file *seq, void *v) | |
600 | { | |
652586df | 601 | seq_setwidth(seq, 127); |
c1dc13e9 | 602 | if (v == SEQ_START_TOKEN) |
652586df TH |
603 | seq_puts(seq, "pt loc rem rs st tx_queue rx_queue " |
604 | " uid inode ref pointer drops"); | |
c1dc13e9 RDC |
605 | else { |
606 | struct sock *sk = v; | |
607 | struct pn_sock *pn = pn_sk(sk); | |
608 | ||
609 | seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu " | |
652586df | 610 | "%d %pK %d", |
a8059512 RDC |
611 | sk->sk_protocol, pn->sobject, pn->dobject, |
612 | pn->resource, sk->sk_state, | |
c1dc13e9 | 613 | sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), |
a7cb5a49 EB |
614 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), |
615 | sock_i_ino(sk), | |
41c6d650 | 616 | refcount_read(&sk->sk_refcnt), sk, |
652586df | 617 | atomic_read(&sk->sk_drops)); |
c1dc13e9 | 618 | } |
652586df | 619 | seq_pad(seq, '\n'); |
c1dc13e9 RDC |
620 | return 0; |
621 | } | |
622 | ||
c3506372 | 623 | const struct seq_operations pn_sock_seq_ops = { |
c1dc13e9 RDC |
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 | }; | |
ae6e2aef | 629 | #endif |
4e3d16ce RDC |
630 | |
631 | static struct { | |
632 | struct sock *sk[256]; | |
633 | } pnres; | |
634 | ||
635 | /* | |
636 | * Find and hold socket based on resource. | |
637 | */ | |
638 | struct sock *pn_find_sock_by_res(struct net *net, u8 res) | |
639 | { | |
640 | struct sock *sk; | |
641 | ||
642 | if (!net_eq(net, &init_net)) | |
643 | return NULL; | |
644 | ||
645 | rcu_read_lock(); | |
646 | sk = rcu_dereference(pnres.sk[res]); | |
647 | if (sk) | |
648 | sock_hold(sk); | |
649 | rcu_read_unlock(); | |
650 | return sk; | |
651 | } | |
652 | ||
653 | static DEFINE_MUTEX(resource_mutex); | |
654 | ||
655 | int pn_sock_bind_res(struct sock *sk, u8 res) | |
656 | { | |
657 | int ret = -EADDRINUSE; | |
658 | ||
659 | if (!net_eq(sock_net(sk), &init_net)) | |
660 | return -ENOIOCTLCMD; | |
661 | if (!capable(CAP_SYS_ADMIN)) | |
662 | return -EPERM; | |
663 | if (pn_socket_autobind(sk->sk_socket)) | |
664 | return -EAGAIN; | |
665 | ||
666 | mutex_lock(&resource_mutex); | |
667 | if (pnres.sk[res] == NULL) { | |
668 | sock_hold(sk); | |
cf778b00 | 669 | rcu_assign_pointer(pnres.sk[res], sk); |
4e3d16ce RDC |
670 | ret = 0; |
671 | } | |
672 | mutex_unlock(&resource_mutex); | |
673 | return ret; | |
674 | } | |
675 | ||
676 | int pn_sock_unbind_res(struct sock *sk, u8 res) | |
677 | { | |
678 | int ret = -ENOENT; | |
679 | ||
680 | if (!capable(CAP_SYS_ADMIN)) | |
681 | return -EPERM; | |
682 | ||
683 | mutex_lock(&resource_mutex); | |
684 | if (pnres.sk[res] == sk) { | |
a9b3cd7f | 685 | RCU_INIT_POINTER(pnres.sk[res], NULL); |
4e3d16ce RDC |
686 | ret = 0; |
687 | } | |
688 | mutex_unlock(&resource_mutex); | |
689 | ||
690 | if (ret == 0) { | |
691 | synchronize_rcu(); | |
692 | sock_put(sk); | |
693 | } | |
694 | return ret; | |
695 | } | |
696 | ||
697 | void pn_sock_unbind_all_res(struct sock *sk) | |
698 | { | |
95c96174 | 699 | unsigned int res, match = 0; |
4e3d16ce RDC |
700 | |
701 | mutex_lock(&resource_mutex); | |
702 | for (res = 0; res < 256; res++) { | |
703 | if (pnres.sk[res] == sk) { | |
a9b3cd7f | 704 | RCU_INIT_POINTER(pnres.sk[res], NULL); |
4e3d16ce RDC |
705 | match++; |
706 | } | |
707 | } | |
708 | mutex_unlock(&resource_mutex); | |
709 | ||
4e3d16ce | 710 | while (match > 0) { |
44f4d5a2 | 711 | __sock_put(sk); |
4e3d16ce RDC |
712 | match--; |
713 | } | |
44f4d5a2 | 714 | /* Caller is responsible for RCU sync before final sock_put() */ |
4e3d16ce | 715 | } |
507215f8 RDC |
716 | |
717 | #ifdef CONFIG_PROC_FS | |
718 | static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos) | |
719 | { | |
720 | struct net *net = seq_file_net(seq); | |
95c96174 | 721 | unsigned int i; |
507215f8 RDC |
722 | |
723 | if (!net_eq(net, &init_net)) | |
724 | return NULL; | |
725 | ||
726 | for (i = 0; i < 256; i++) { | |
727 | if (pnres.sk[i] == NULL) | |
728 | continue; | |
729 | if (!pos) | |
730 | return pnres.sk + i; | |
731 | pos--; | |
732 | } | |
733 | return NULL; | |
734 | } | |
735 | ||
736 | static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk) | |
737 | { | |
738 | struct net *net = seq_file_net(seq); | |
95c96174 | 739 | unsigned int i; |
507215f8 RDC |
740 | |
741 | BUG_ON(!net_eq(net, &init_net)); | |
742 | ||
743 | for (i = (sk - pnres.sk) + 1; i < 256; i++) | |
744 | if (pnres.sk[i]) | |
745 | return pnres.sk + i; | |
746 | return NULL; | |
747 | } | |
748 | ||
749 | static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos) | |
750 | __acquires(resource_mutex) | |
751 | { | |
752 | mutex_lock(&resource_mutex); | |
753 | return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
754 | } | |
755 | ||
756 | static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
757 | { | |
758 | struct sock **sk; | |
759 | ||
760 | if (v == SEQ_START_TOKEN) | |
761 | sk = pn_res_get_idx(seq, 0); | |
762 | else | |
763 | sk = pn_res_get_next(seq, v); | |
764 | (*pos)++; | |
765 | return sk; | |
766 | } | |
767 | ||
768 | static void pn_res_seq_stop(struct seq_file *seq, void *v) | |
769 | __releases(resource_mutex) | |
770 | { | |
771 | mutex_unlock(&resource_mutex); | |
772 | } | |
773 | ||
774 | static int pn_res_seq_show(struct seq_file *seq, void *v) | |
775 | { | |
652586df | 776 | seq_setwidth(seq, 63); |
507215f8 | 777 | if (v == SEQ_START_TOKEN) |
652586df | 778 | seq_puts(seq, "rs uid inode"); |
507215f8 RDC |
779 | else { |
780 | struct sock **psk = v; | |
781 | struct sock *sk = *psk; | |
782 | ||
652586df | 783 | seq_printf(seq, "%02X %5u %lu", |
a7cb5a49 EB |
784 | (int) (psk - pnres.sk), |
785 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), | |
652586df | 786 | sock_i_ino(sk)); |
507215f8 | 787 | } |
652586df | 788 | seq_pad(seq, '\n'); |
507215f8 RDC |
789 | return 0; |
790 | } | |
791 | ||
c3506372 | 792 | const struct seq_operations pn_res_seq_ops = { |
507215f8 RDC |
793 | .start = pn_res_seq_start, |
794 | .next = pn_res_seq_next, | |
795 | .stop = pn_res_seq_stop, | |
796 | .show = pn_res_seq_show, | |
797 | }; | |
507215f8 | 798 | #endif |