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]; |
44f4d5a2 | 55 | struct mutex 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); | |
44f4d5a2 | 64 | mutex_init(&pnsocks.lock); |
6b0d07ba RDC |
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 | 84 | |
44f4d5a2 RDC |
85 | rcu_read_lock(); |
86 | sk_for_each_rcu(sknode, node, hlist) { | |
ba113a94 RDC |
87 | struct pn_sock *pn = pn_sk(sknode); |
88 | BUG_ON(!pn->sobject); /* unbound socket */ | |
89 | ||
52404881 RDC |
90 | if (!net_eq(sock_net(sknode), net)) |
91 | continue; | |
ba113a94 RDC |
92 | if (pn_port(obj)) { |
93 | /* Look up socket by port */ | |
94 | if (pn_port(pn->sobject) != pn_port(obj)) | |
95 | continue; | |
96 | } else { | |
97 | /* If port is zero, look up by resource */ | |
98 | if (pn->resource != res) | |
99 | continue; | |
100 | } | |
f64f9e71 JP |
101 | if (pn_addr(pn->sobject) && |
102 | pn_addr(pn->sobject) != pn_addr(obj)) | |
ba113a94 RDC |
103 | continue; |
104 | ||
105 | rval = sknode; | |
106 | sock_hold(sknode); | |
107 | break; | |
108 | } | |
44f4d5a2 | 109 | rcu_read_unlock(); |
ba113a94 RDC |
110 | |
111 | return rval; | |
f14001fc RDC |
112 | } |
113 | ||
114 | /* Deliver a broadcast packet (only in bottom-half) */ | |
115 | void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb) | |
116 | { | |
6b0d07ba RDC |
117 | struct hlist_head *hlist = pnsocks.hlist; |
118 | unsigned h; | |
f14001fc | 119 | |
44f4d5a2 | 120 | rcu_read_lock(); |
6b0d07ba RDC |
121 | for (h = 0; h < PN_HASHSIZE; h++) { |
122 | struct hlist_node *node; | |
123 | struct sock *sknode; | |
f14001fc | 124 | |
6b0d07ba RDC |
125 | sk_for_each(sknode, node, hlist) { |
126 | struct sk_buff *clone; | |
ba113a94 | 127 | |
6b0d07ba RDC |
128 | if (!net_eq(sock_net(sknode), net)) |
129 | continue; | |
130 | if (!sock_flag(sknode, SOCK_BROADCAST)) | |
131 | continue; | |
132 | ||
133 | clone = skb_clone(skb, GFP_ATOMIC); | |
134 | if (clone) { | |
135 | sock_hold(sknode); | |
136 | sk_receive_skb(sknode, clone, 0); | |
137 | } | |
21912d1c | 138 | } |
6b0d07ba | 139 | hlist++; |
f14001fc | 140 | } |
44f4d5a2 | 141 | rcu_read_unlock(); |
ba113a94 RDC |
142 | } |
143 | ||
144 | void pn_sock_hash(struct sock *sk) | |
145 | { | |
6b0d07ba RDC |
146 | struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject); |
147 | ||
44f4d5a2 RDC |
148 | mutex_lock(&pnsocks.lock); |
149 | sk_add_node_rcu(sk, hlist); | |
150 | mutex_unlock(&pnsocks.lock); | |
ba113a94 RDC |
151 | } |
152 | EXPORT_SYMBOL(pn_sock_hash); | |
153 | ||
154 | void pn_sock_unhash(struct sock *sk) | |
155 | { | |
44f4d5a2 RDC |
156 | mutex_lock(&pnsocks.lock); |
157 | sk_del_node_init_rcu(sk); | |
158 | mutex_unlock(&pnsocks.lock); | |
7417fa83 | 159 | pn_sock_unbind_all_res(sk); |
44f4d5a2 | 160 | synchronize_rcu(); |
ba113a94 RDC |
161 | } |
162 | EXPORT_SYMBOL(pn_sock_unhash); | |
163 | ||
582b0b61 RDC |
164 | static DEFINE_MUTEX(port_mutex); |
165 | ||
ba113a94 RDC |
166 | static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len) |
167 | { | |
168 | struct sock *sk = sock->sk; | |
169 | struct pn_sock *pn = pn_sk(sk); | |
170 | struct sockaddr_pn *spn = (struct sockaddr_pn *)addr; | |
171 | int err; | |
172 | u16 handle; | |
173 | u8 saddr; | |
174 | ||
175 | if (sk->sk_prot->bind) | |
176 | return sk->sk_prot->bind(sk, addr, len); | |
177 | ||
178 | if (len < sizeof(struct sockaddr_pn)) | |
179 | return -EINVAL; | |
180 | if (spn->spn_family != AF_PHONET) | |
181 | return -EAFNOSUPPORT; | |
182 | ||
183 | handle = pn_sockaddr_get_object((struct sockaddr_pn *)addr); | |
184 | saddr = pn_addr(handle); | |
52404881 | 185 | if (saddr && phonet_address_lookup(sock_net(sk), saddr)) |
ba113a94 RDC |
186 | return -EADDRNOTAVAIL; |
187 | ||
188 | lock_sock(sk); | |
189 | if (sk->sk_state != TCP_CLOSE || pn_port(pn->sobject)) { | |
190 | err = -EINVAL; /* attempt to rebind */ | |
191 | goto out; | |
192 | } | |
582b0b61 RDC |
193 | WARN_ON(sk_hashed(sk)); |
194 | mutex_lock(&port_mutex); | |
ba113a94 RDC |
195 | err = sk->sk_prot->get_port(sk, pn_port(handle)); |
196 | if (err) | |
582b0b61 | 197 | goto out_port; |
ba113a94 RDC |
198 | |
199 | /* get_port() sets the port, bind() sets the address if applicable */ | |
200 | pn->sobject = pn_object(saddr, pn_port(pn->sobject)); | |
201 | pn->resource = spn->spn_resource; | |
202 | ||
203 | /* Enable RX on the socket */ | |
204 | sk->sk_prot->hash(sk); | |
582b0b61 RDC |
205 | out_port: |
206 | mutex_unlock(&port_mutex); | |
ba113a94 RDC |
207 | out: |
208 | release_sock(sk); | |
209 | return err; | |
210 | } | |
211 | ||
212 | static int pn_socket_autobind(struct socket *sock) | |
213 | { | |
214 | struct sockaddr_pn sa; | |
215 | int err; | |
216 | ||
217 | memset(&sa, 0, sizeof(sa)); | |
218 | sa.spn_family = AF_PHONET; | |
219 | err = pn_socket_bind(sock, (struct sockaddr *)&sa, | |
220 | sizeof(struct sockaddr_pn)); | |
221 | if (err != -EINVAL) | |
222 | return err; | |
223 | BUG_ON(!pn_port(pn_sk(sock->sk)->sobject)); | |
224 | return 0; /* socket was already bound */ | |
225 | } | |
226 | ||
b3d62553 KS |
227 | static int pn_socket_connect(struct socket *sock, struct sockaddr *addr, |
228 | int len, int flags) | |
229 | { | |
230 | struct sock *sk = sock->sk; | |
297edb60 | 231 | struct pn_sock *pn = pn_sk(sk); |
b3d62553 | 232 | struct sockaddr_pn *spn = (struct sockaddr_pn *)addr; |
297edb60 RDC |
233 | struct task_struct *tsk = current; |
234 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
b3d62553 KS |
235 | int err; |
236 | ||
297edb60 RDC |
237 | if (pn_socket_autobind(sock)) |
238 | return -ENOBUFS; | |
b3d62553 KS |
239 | if (len < sizeof(struct sockaddr_pn)) |
240 | return -EINVAL; | |
241 | if (spn->spn_family != AF_PHONET) | |
242 | return -EAFNOSUPPORT; | |
243 | ||
244 | lock_sock(sk); | |
245 | ||
246 | switch (sock->state) { | |
247 | case SS_UNCONNECTED: | |
297edb60 | 248 | if (sk->sk_state != TCP_CLOSE) { |
b3d62553 KS |
249 | err = -EISCONN; |
250 | goto out; | |
b3d62553 KS |
251 | } |
252 | break; | |
297edb60 RDC |
253 | case SS_CONNECTING: |
254 | err = -EALREADY; | |
255 | goto out; | |
256 | default: | |
257 | err = -EISCONN; | |
258 | goto out; | |
b3d62553 | 259 | } |
b3d62553 | 260 | |
297edb60 RDC |
261 | pn->dobject = pn_sockaddr_get_object(spn); |
262 | pn->resource = pn_sockaddr_get_resource(spn); | |
b3d62553 | 263 | sock->state = SS_CONNECTING; |
297edb60 | 264 | |
b3d62553 | 265 | err = sk->sk_prot->connect(sk, addr, len); |
297edb60 | 266 | if (err) { |
b3d62553 | 267 | sock->state = SS_UNCONNECTED; |
297edb60 | 268 | pn->dobject = 0; |
b3d62553 KS |
269 | goto out; |
270 | } | |
271 | ||
297edb60 RDC |
272 | while (sk->sk_state == TCP_SYN_SENT) { |
273 | DEFINE_WAIT(wait); | |
b3d62553 | 274 | |
297edb60 RDC |
275 | if (!timeo) { |
276 | err = -EINPROGRESS; | |
277 | goto out; | |
278 | } | |
279 | if (signal_pending(tsk)) { | |
280 | err = sock_intr_errno(timeo); | |
281 | goto out; | |
282 | } | |
b3d62553 | 283 | |
297edb60 RDC |
284 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
285 | TASK_INTERRUPTIBLE); | |
286 | release_sock(sk); | |
287 | timeo = schedule_timeout(timeo); | |
288 | lock_sock(sk); | |
289 | finish_wait(sk_sleep(sk), &wait); | |
b3d62553 | 290 | } |
b3d62553 | 291 | |
297edb60 RDC |
292 | if ((1 << sk->sk_state) & (TCPF_SYN_RECV|TCPF_ESTABLISHED)) |
293 | err = 0; | |
294 | else if (sk->sk_state == TCP_CLOSE_WAIT) | |
295 | err = -ECONNRESET; | |
296 | else | |
297 | err = -ECONNREFUSED; | |
298 | sock->state = err ? SS_UNCONNECTED : SS_CONNECTED; | |
b3d62553 KS |
299 | out: |
300 | release_sock(sk); | |
301 | return err; | |
302 | } | |
b3d62553 | 303 | |
9995a32b RDC |
304 | static int pn_socket_accept(struct socket *sock, struct socket *newsock, |
305 | int flags) | |
306 | { | |
307 | struct sock *sk = sock->sk; | |
308 | struct sock *newsk; | |
309 | int err; | |
310 | ||
f7ae8d59 RDC |
311 | if (unlikely(sk->sk_state != TCP_LISTEN)) |
312 | return -EINVAL; | |
313 | ||
9995a32b RDC |
314 | newsk = sk->sk_prot->accept(sk, flags, &err); |
315 | if (!newsk) | |
316 | return err; | |
317 | ||
318 | lock_sock(newsk); | |
319 | sock_graft(newsk, newsock); | |
320 | newsock->state = SS_CONNECTED; | |
321 | release_sock(newsk); | |
322 | return 0; | |
323 | } | |
324 | ||
ba113a94 RDC |
325 | static int pn_socket_getname(struct socket *sock, struct sockaddr *addr, |
326 | int *sockaddr_len, int peer) | |
327 | { | |
328 | struct sock *sk = sock->sk; | |
329 | struct pn_sock *pn = pn_sk(sk); | |
330 | ||
331 | memset(addr, 0, sizeof(struct sockaddr_pn)); | |
332 | addr->sa_family = AF_PHONET; | |
333 | if (!peer) /* Race with bind() here is userland's problem. */ | |
334 | pn_sockaddr_set_object((struct sockaddr_pn *)addr, | |
335 | pn->sobject); | |
336 | ||
337 | *sockaddr_len = sizeof(struct sockaddr_pn); | |
338 | return 0; | |
339 | } | |
340 | ||
9995a32b RDC |
341 | static unsigned int pn_socket_poll(struct file *file, struct socket *sock, |
342 | poll_table *wait) | |
343 | { | |
344 | struct sock *sk = sock->sk; | |
345 | struct pep_sock *pn = pep_sk(sk); | |
346 | unsigned int mask = 0; | |
347 | ||
43815482 | 348 | poll_wait(file, sk_sleep(sk), wait); |
9995a32b | 349 | |
f7ae8d59 | 350 | if (sk->sk_state == TCP_CLOSE) |
9995a32b | 351 | return POLLERR; |
9995a32b RDC |
352 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
353 | mask |= POLLIN | POLLRDNORM; | |
c41bd97f RDC |
354 | if (!skb_queue_empty(&pn->ctrlreq_queue)) |
355 | mask |= POLLPRI; | |
356 | if (!mask && sk->sk_state == TCP_CLOSE_WAIT) | |
9995a32b RDC |
357 | return POLLHUP; |
358 | ||
01b38606 RDC |
359 | if (sk->sk_state == TCP_ESTABLISHED && |
360 | atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf && | |
361 | atomic_read(&pn->tx_credits)) | |
9995a32b RDC |
362 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
363 | ||
364 | return mask; | |
365 | } | |
366 | ||
ba113a94 RDC |
367 | static int pn_socket_ioctl(struct socket *sock, unsigned int cmd, |
368 | unsigned long arg) | |
369 | { | |
370 | struct sock *sk = sock->sk; | |
371 | struct pn_sock *pn = pn_sk(sk); | |
372 | ||
373 | if (cmd == SIOCPNGETOBJECT) { | |
374 | struct net_device *dev; | |
375 | u16 handle; | |
376 | u8 saddr; | |
377 | ||
378 | if (get_user(handle, (__u16 __user *)arg)) | |
379 | return -EFAULT; | |
380 | ||
381 | lock_sock(sk); | |
382 | if (sk->sk_bound_dev_if) | |
383 | dev = dev_get_by_index(sock_net(sk), | |
384 | sk->sk_bound_dev_if); | |
385 | else | |
386 | dev = phonet_device_get(sock_net(sk)); | |
387 | if (dev && (dev->flags & IFF_UP)) | |
388 | saddr = phonet_address_get(dev, pn_addr(handle)); | |
389 | else | |
390 | saddr = PN_NO_ADDR; | |
391 | release_sock(sk); | |
392 | ||
393 | if (dev) | |
394 | dev_put(dev); | |
395 | if (saddr == PN_NO_ADDR) | |
396 | return -EHOSTUNREACH; | |
397 | ||
398 | handle = pn_object(saddr, pn_port(pn->sobject)); | |
399 | return put_user(handle, (__u16 __user *)arg); | |
400 | } | |
401 | ||
402 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
403 | } | |
404 | ||
9995a32b RDC |
405 | static int pn_socket_listen(struct socket *sock, int backlog) |
406 | { | |
407 | struct sock *sk = sock->sk; | |
408 | int err = 0; | |
409 | ||
9995a32b RDC |
410 | if (pn_socket_autobind(sock)) |
411 | return -ENOBUFS; | |
412 | ||
413 | lock_sock(sk); | |
96241544 | 414 | if (sock->state != SS_UNCONNECTED) { |
9995a32b RDC |
415 | err = -EINVAL; |
416 | goto out; | |
417 | } | |
418 | ||
96241544 RDC |
419 | if (sk->sk_state != TCP_LISTEN) { |
420 | sk->sk_state = TCP_LISTEN; | |
421 | sk->sk_ack_backlog = 0; | |
422 | } | |
9995a32b RDC |
423 | sk->sk_max_ack_backlog = backlog; |
424 | out: | |
425 | release_sock(sk); | |
426 | return err; | |
427 | } | |
428 | ||
ba113a94 RDC |
429 | static int pn_socket_sendmsg(struct kiocb *iocb, struct socket *sock, |
430 | struct msghdr *m, size_t total_len) | |
431 | { | |
432 | struct sock *sk = sock->sk; | |
433 | ||
434 | if (pn_socket_autobind(sock)) | |
435 | return -EAGAIN; | |
436 | ||
437 | return sk->sk_prot->sendmsg(iocb, sk, m, total_len); | |
438 | } | |
439 | ||
440 | const struct proto_ops phonet_dgram_ops = { | |
441 | .family = AF_PHONET, | |
442 | .owner = THIS_MODULE, | |
443 | .release = pn_socket_release, | |
444 | .bind = pn_socket_bind, | |
445 | .connect = sock_no_connect, | |
446 | .socketpair = sock_no_socketpair, | |
447 | .accept = sock_no_accept, | |
448 | .getname = pn_socket_getname, | |
449 | .poll = datagram_poll, | |
450 | .ioctl = pn_socket_ioctl, | |
451 | .listen = sock_no_listen, | |
452 | .shutdown = sock_no_shutdown, | |
453 | .setsockopt = sock_no_setsockopt, | |
454 | .getsockopt = sock_no_getsockopt, | |
455 | #ifdef CONFIG_COMPAT | |
456 | .compat_setsockopt = sock_no_setsockopt, | |
457 | .compat_getsockopt = sock_no_getsockopt, | |
458 | #endif | |
459 | .sendmsg = pn_socket_sendmsg, | |
460 | .recvmsg = sock_common_recvmsg, | |
461 | .mmap = sock_no_mmap, | |
462 | .sendpage = sock_no_sendpage, | |
463 | }; | |
464 | ||
9995a32b RDC |
465 | const struct proto_ops phonet_stream_ops = { |
466 | .family = AF_PHONET, | |
467 | .owner = THIS_MODULE, | |
468 | .release = pn_socket_release, | |
469 | .bind = pn_socket_bind, | |
b3d62553 | 470 | .connect = pn_socket_connect, |
9995a32b RDC |
471 | .socketpair = sock_no_socketpair, |
472 | .accept = pn_socket_accept, | |
473 | .getname = pn_socket_getname, | |
474 | .poll = pn_socket_poll, | |
475 | .ioctl = pn_socket_ioctl, | |
476 | .listen = pn_socket_listen, | |
477 | .shutdown = sock_no_shutdown, | |
02a47617 RDC |
478 | .setsockopt = sock_common_setsockopt, |
479 | .getsockopt = sock_common_getsockopt, | |
9995a32b | 480 | #ifdef CONFIG_COMPAT |
02a47617 RDC |
481 | .compat_setsockopt = compat_sock_common_setsockopt, |
482 | .compat_getsockopt = compat_sock_common_getsockopt, | |
9995a32b RDC |
483 | #endif |
484 | .sendmsg = pn_socket_sendmsg, | |
485 | .recvmsg = sock_common_recvmsg, | |
486 | .mmap = sock_no_mmap, | |
487 | .sendpage = sock_no_sendpage, | |
488 | }; | |
489 | EXPORT_SYMBOL(phonet_stream_ops); | |
490 | ||
ba113a94 RDC |
491 | /* allocate port for a socket */ |
492 | int pn_sock_get_port(struct sock *sk, unsigned short sport) | |
493 | { | |
494 | static int port_cur; | |
52404881 | 495 | struct net *net = sock_net(sk); |
ba113a94 RDC |
496 | struct pn_sock *pn = pn_sk(sk); |
497 | struct sockaddr_pn try_sa; | |
498 | struct sock *tmpsk; | |
499 | ||
500 | memset(&try_sa, 0, sizeof(struct sockaddr_pn)); | |
501 | try_sa.spn_family = AF_PHONET; | |
582b0b61 | 502 | WARN_ON(!mutex_is_locked(&port_mutex)); |
ba113a94 RDC |
503 | if (!sport) { |
504 | /* search free port */ | |
87ab4e20 | 505 | int port, pmin, pmax; |
ba113a94 | 506 | |
87ab4e20 | 507 | phonet_get_local_port_range(&pmin, &pmax); |
ba113a94 RDC |
508 | for (port = pmin; port <= pmax; port++) { |
509 | port_cur++; | |
510 | if (port_cur < pmin || port_cur > pmax) | |
511 | port_cur = pmin; | |
512 | ||
513 | pn_sockaddr_set_port(&try_sa, port_cur); | |
52404881 | 514 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
515 | if (tmpsk == NULL) { |
516 | sport = port_cur; | |
517 | goto found; | |
518 | } else | |
519 | sock_put(tmpsk); | |
520 | } | |
521 | } else { | |
522 | /* try to find specific port */ | |
523 | pn_sockaddr_set_port(&try_sa, sport); | |
52404881 | 524 | tmpsk = pn_find_sock_by_sa(net, &try_sa); |
ba113a94 RDC |
525 | if (tmpsk == NULL) |
526 | /* No sock there! We can use that port... */ | |
527 | goto found; | |
528 | else | |
529 | sock_put(tmpsk); | |
530 | } | |
ba113a94 RDC |
531 | /* the port must be in use already */ |
532 | return -EADDRINUSE; | |
533 | ||
534 | found: | |
ba113a94 RDC |
535 | pn->sobject = pn_object(pn_addr(pn->sobject), sport); |
536 | return 0; | |
537 | } | |
538 | EXPORT_SYMBOL(pn_sock_get_port); | |
c1dc13e9 | 539 | |
ae6e2aef | 540 | #ifdef CONFIG_PROC_FS |
c1dc13e9 RDC |
541 | static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos) |
542 | { | |
543 | struct net *net = seq_file_net(seq); | |
6b0d07ba | 544 | struct hlist_head *hlist = pnsocks.hlist; |
c1dc13e9 RDC |
545 | struct hlist_node *node; |
546 | struct sock *sknode; | |
6b0d07ba | 547 | unsigned h; |
c1dc13e9 | 548 | |
6b0d07ba | 549 | for (h = 0; h < PN_HASHSIZE; h++) { |
44f4d5a2 | 550 | sk_for_each_rcu(sknode, node, hlist) { |
6b0d07ba RDC |
551 | if (!net_eq(net, sock_net(sknode))) |
552 | continue; | |
553 | if (!pos) | |
554 | return sknode; | |
555 | pos--; | |
556 | } | |
557 | hlist++; | |
c1dc13e9 RDC |
558 | } |
559 | return NULL; | |
560 | } | |
561 | ||
562 | static struct sock *pn_sock_get_next(struct seq_file *seq, struct sock *sk) | |
563 | { | |
564 | struct net *net = seq_file_net(seq); | |
565 | ||
566 | do | |
567 | sk = sk_next(sk); | |
568 | while (sk && !net_eq(net, sock_net(sk))); | |
569 | ||
570 | return sk; | |
571 | } | |
572 | ||
573 | static void *pn_sock_seq_start(struct seq_file *seq, loff_t *pos) | |
44f4d5a2 | 574 | __acquires(rcu) |
c1dc13e9 | 575 | { |
44f4d5a2 | 576 | rcu_read_lock(); |
c1dc13e9 RDC |
577 | return *pos ? pn_sock_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
578 | } | |
579 | ||
580 | static void *pn_sock_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
581 | { | |
582 | struct sock *sk; | |
583 | ||
584 | if (v == SEQ_START_TOKEN) | |
585 | sk = pn_sock_get_idx(seq, 0); | |
586 | else | |
587 | sk = pn_sock_get_next(seq, v); | |
588 | (*pos)++; | |
589 | return sk; | |
590 | } | |
591 | ||
592 | static void pn_sock_seq_stop(struct seq_file *seq, void *v) | |
44f4d5a2 | 593 | __releases(rcu) |
c1dc13e9 | 594 | { |
44f4d5a2 | 595 | rcu_read_unlock(); |
c1dc13e9 RDC |
596 | } |
597 | ||
598 | static int pn_sock_seq_show(struct seq_file *seq, void *v) | |
599 | { | |
600 | int len; | |
601 | ||
602 | if (v == SEQ_START_TOKEN) | |
603 | seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue " | |
604 | " uid inode ref pointer drops", &len); | |
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 " | |
71338aa7 | 610 | "%d %pK %d%n", |
a8059512 RDC |
611 | sk->sk_protocol, pn->sobject, pn->dobject, |
612 | pn->resource, sk->sk_state, | |
c1dc13e9 RDC |
613 | sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), |
614 | sock_i_uid(sk), sock_i_ino(sk), | |
615 | atomic_read(&sk->sk_refcnt), sk, | |
616 | atomic_read(&sk->sk_drops), &len); | |
617 | } | |
618 | seq_printf(seq, "%*s\n", 127 - len, ""); | |
619 | return 0; | |
620 | } | |
621 | ||
622 | static const struct seq_operations pn_sock_seq_ops = { | |
623 | .start = pn_sock_seq_start, | |
624 | .next = pn_sock_seq_next, | |
625 | .stop = pn_sock_seq_stop, | |
626 | .show = pn_sock_seq_show, | |
627 | }; | |
628 | ||
629 | static int pn_sock_open(struct inode *inode, struct file *file) | |
630 | { | |
cb7d9e7f RDC |
631 | return seq_open_net(inode, file, &pn_sock_seq_ops, |
632 | sizeof(struct seq_net_private)); | |
c1dc13e9 RDC |
633 | } |
634 | ||
635 | const struct file_operations pn_sock_seq_fops = { | |
636 | .owner = THIS_MODULE, | |
637 | .open = pn_sock_open, | |
638 | .read = seq_read, | |
639 | .llseek = seq_lseek, | |
cb7d9e7f | 640 | .release = seq_release_net, |
c1dc13e9 | 641 | }; |
ae6e2aef | 642 | #endif |
4e3d16ce RDC |
643 | |
644 | static struct { | |
645 | struct sock *sk[256]; | |
646 | } pnres; | |
647 | ||
648 | /* | |
649 | * Find and hold socket based on resource. | |
650 | */ | |
651 | struct sock *pn_find_sock_by_res(struct net *net, u8 res) | |
652 | { | |
653 | struct sock *sk; | |
654 | ||
655 | if (!net_eq(net, &init_net)) | |
656 | return NULL; | |
657 | ||
658 | rcu_read_lock(); | |
659 | sk = rcu_dereference(pnres.sk[res]); | |
660 | if (sk) | |
661 | sock_hold(sk); | |
662 | rcu_read_unlock(); | |
663 | return sk; | |
664 | } | |
665 | ||
666 | static DEFINE_MUTEX(resource_mutex); | |
667 | ||
668 | int pn_sock_bind_res(struct sock *sk, u8 res) | |
669 | { | |
670 | int ret = -EADDRINUSE; | |
671 | ||
672 | if (!net_eq(sock_net(sk), &init_net)) | |
673 | return -ENOIOCTLCMD; | |
674 | if (!capable(CAP_SYS_ADMIN)) | |
675 | return -EPERM; | |
676 | if (pn_socket_autobind(sk->sk_socket)) | |
677 | return -EAGAIN; | |
678 | ||
679 | mutex_lock(&resource_mutex); | |
680 | if (pnres.sk[res] == NULL) { | |
681 | sock_hold(sk); | |
682 | rcu_assign_pointer(pnres.sk[res], sk); | |
683 | ret = 0; | |
684 | } | |
685 | mutex_unlock(&resource_mutex); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | int pn_sock_unbind_res(struct sock *sk, u8 res) | |
690 | { | |
691 | int ret = -ENOENT; | |
692 | ||
693 | if (!capable(CAP_SYS_ADMIN)) | |
694 | return -EPERM; | |
695 | ||
696 | mutex_lock(&resource_mutex); | |
697 | if (pnres.sk[res] == sk) { | |
698 | rcu_assign_pointer(pnres.sk[res], NULL); | |
699 | ret = 0; | |
700 | } | |
701 | mutex_unlock(&resource_mutex); | |
702 | ||
703 | if (ret == 0) { | |
704 | synchronize_rcu(); | |
705 | sock_put(sk); | |
706 | } | |
707 | return ret; | |
708 | } | |
709 | ||
710 | void pn_sock_unbind_all_res(struct sock *sk) | |
711 | { | |
712 | unsigned res, match = 0; | |
713 | ||
714 | mutex_lock(&resource_mutex); | |
715 | for (res = 0; res < 256; res++) { | |
716 | if (pnres.sk[res] == sk) { | |
717 | rcu_assign_pointer(pnres.sk[res], NULL); | |
718 | match++; | |
719 | } | |
720 | } | |
721 | mutex_unlock(&resource_mutex); | |
722 | ||
4e3d16ce | 723 | while (match > 0) { |
44f4d5a2 | 724 | __sock_put(sk); |
4e3d16ce RDC |
725 | match--; |
726 | } | |
44f4d5a2 | 727 | /* Caller is responsible for RCU sync before final sock_put() */ |
4e3d16ce | 728 | } |
507215f8 RDC |
729 | |
730 | #ifdef CONFIG_PROC_FS | |
731 | static struct sock **pn_res_get_idx(struct seq_file *seq, loff_t pos) | |
732 | { | |
733 | struct net *net = seq_file_net(seq); | |
734 | unsigned i; | |
735 | ||
736 | if (!net_eq(net, &init_net)) | |
737 | return NULL; | |
738 | ||
739 | for (i = 0; i < 256; i++) { | |
740 | if (pnres.sk[i] == NULL) | |
741 | continue; | |
742 | if (!pos) | |
743 | return pnres.sk + i; | |
744 | pos--; | |
745 | } | |
746 | return NULL; | |
747 | } | |
748 | ||
749 | static struct sock **pn_res_get_next(struct seq_file *seq, struct sock **sk) | |
750 | { | |
751 | struct net *net = seq_file_net(seq); | |
752 | unsigned i; | |
753 | ||
754 | BUG_ON(!net_eq(net, &init_net)); | |
755 | ||
756 | for (i = (sk - pnres.sk) + 1; i < 256; i++) | |
757 | if (pnres.sk[i]) | |
758 | return pnres.sk + i; | |
759 | return NULL; | |
760 | } | |
761 | ||
762 | static void *pn_res_seq_start(struct seq_file *seq, loff_t *pos) | |
763 | __acquires(resource_mutex) | |
764 | { | |
765 | mutex_lock(&resource_mutex); | |
766 | return *pos ? pn_res_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
767 | } | |
768 | ||
769 | static void *pn_res_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
770 | { | |
771 | struct sock **sk; | |
772 | ||
773 | if (v == SEQ_START_TOKEN) | |
774 | sk = pn_res_get_idx(seq, 0); | |
775 | else | |
776 | sk = pn_res_get_next(seq, v); | |
777 | (*pos)++; | |
778 | return sk; | |
779 | } | |
780 | ||
781 | static void pn_res_seq_stop(struct seq_file *seq, void *v) | |
782 | __releases(resource_mutex) | |
783 | { | |
784 | mutex_unlock(&resource_mutex); | |
785 | } | |
786 | ||
787 | static int pn_res_seq_show(struct seq_file *seq, void *v) | |
788 | { | |
789 | int len; | |
790 | ||
791 | if (v == SEQ_START_TOKEN) | |
792 | seq_printf(seq, "%s%n", "rs uid inode", &len); | |
793 | else { | |
794 | struct sock **psk = v; | |
795 | struct sock *sk = *psk; | |
796 | ||
797 | seq_printf(seq, "%02X %5d %lu%n", | |
9e0064a5 DM |
798 | (int) (psk - pnres.sk), sock_i_uid(sk), |
799 | sock_i_ino(sk), &len); | |
507215f8 RDC |
800 | } |
801 | seq_printf(seq, "%*s\n", 63 - len, ""); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static const struct seq_operations pn_res_seq_ops = { | |
806 | .start = pn_res_seq_start, | |
807 | .next = pn_res_seq_next, | |
808 | .stop = pn_res_seq_stop, | |
809 | .show = pn_res_seq_show, | |
810 | }; | |
811 | ||
812 | static int pn_res_open(struct inode *inode, struct file *file) | |
813 | { | |
814 | return seq_open_net(inode, file, &pn_res_seq_ops, | |
815 | sizeof(struct seq_net_private)); | |
816 | } | |
817 | ||
818 | const struct file_operations pn_res_seq_fops = { | |
819 | .owner = THIS_MODULE, | |
820 | .open = pn_res_open, | |
821 | .read = seq_read, | |
822 | .llseek = seq_lseek, | |
823 | .release = seq_release_net, | |
824 | }; | |
825 | #endif |