Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/socket.c: TIPC socket API | |
c4307285 | 3 | * |
8826cde6 | 4 | * Copyright (c) 2001-2007, 2012-2014, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
b97bf3fd | 37 | #include "core.h" |
d265fef6 | 38 | #include "port.h" |
b97bf3fd | 39 | |
2cf8aa19 | 40 | #include <linux/export.h> |
2cf8aa19 | 41 | |
b97bf3fd PL |
42 | #define SS_LISTENING -1 /* socket is listening */ |
43 | #define SS_READY -2 /* socket is connectionless */ | |
44 | ||
3654ea02 | 45 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
b97bf3fd | 46 | |
0c3141e9 | 47 | static int backlog_rcv(struct sock *sk, struct sk_buff *skb); |
f288bef4 YX |
48 | static void tipc_data_ready(struct sock *sk, int len); |
49 | static void tipc_write_space(struct sock *sk); | |
247f0f3c YX |
50 | static int tipc_release(struct socket *sock); |
51 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
b97bf3fd | 52 | |
bca65eae FW |
53 | static const struct proto_ops packet_ops; |
54 | static const struct proto_ops stream_ops; | |
55 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
56 | |
57 | static struct proto tipc_proto; | |
c5fa7b3c | 58 | static struct proto tipc_proto_kern; |
b97bf3fd | 59 | |
c4307285 | 60 | /* |
0c3141e9 AS |
61 | * Revised TIPC socket locking policy: |
62 | * | |
63 | * Most socket operations take the standard socket lock when they start | |
64 | * and hold it until they finish (or until they need to sleep). Acquiring | |
65 | * this lock grants the owner exclusive access to the fields of the socket | |
66 | * data structures, with the exception of the backlog queue. A few socket | |
67 | * operations can be done without taking the socket lock because they only | |
68 | * read socket information that never changes during the life of the socket. | |
69 | * | |
70 | * Socket operations may acquire the lock for the associated TIPC port if they | |
71 | * need to perform an operation on the port. If any routine needs to acquire | |
72 | * both the socket lock and the port lock it must take the socket lock first | |
73 | * to avoid the risk of deadlock. | |
74 | * | |
75 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
76 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
77 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
78 | * and either handles the message itself or adds it to the socket's backlog | |
79 | * queue; in the latter case the queued message is processed once the process | |
80 | * owning the socket lock releases it. | |
81 | * | |
82 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
83 | * the problem of a blocked socket operation preventing any other operations | |
84 | * from occurring. However, applications must be careful if they have | |
85 | * multiple threads trying to send (or receive) on the same socket, as these | |
86 | * operations might interfere with each other. For example, doing a connect | |
87 | * and a receive at the same time might allow the receive to consume the | |
88 | * ACK message meant for the connect. While additional work could be done | |
89 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
90 | * | |
91 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
92 | * that another operation that must be performed in a non-blocking manner is | |
93 | * not delayed for very long because the lock has already been taken. | |
94 | * | |
95 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
96 | * constant over its lifetime; such fields can be examined without taking | |
97 | * the socket lock and/or port lock, and do not need to be re-read even | |
98 | * after resuming processing after waiting. These fields include: | |
99 | * - socket type | |
100 | * - pointer to socket sk structure (aka tipc_sock structure) | |
101 | * - pointer to port structure | |
102 | * - port reference | |
103 | */ | |
104 | ||
8826cde6 JPM |
105 | #include "socket.h" |
106 | ||
0c3141e9 AS |
107 | /** |
108 | * advance_rx_queue - discard first buffer in socket receive queue | |
109 | * | |
110 | * Caller must hold socket lock | |
b97bf3fd | 111 | */ |
0c3141e9 | 112 | static void advance_rx_queue(struct sock *sk) |
b97bf3fd | 113 | { |
5f6d9123 | 114 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
115 | } |
116 | ||
b97bf3fd | 117 | /** |
0c3141e9 AS |
118 | * reject_rx_queue - reject all buffers in socket receive queue |
119 | * | |
120 | * Caller must hold socket lock | |
b97bf3fd | 121 | */ |
0c3141e9 | 122 | static void reject_rx_queue(struct sock *sk) |
b97bf3fd | 123 | { |
0c3141e9 AS |
124 | struct sk_buff *buf; |
125 | ||
9da3d475 | 126 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) |
0c3141e9 | 127 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
b97bf3fd PL |
128 | } |
129 | ||
130 | /** | |
c5fa7b3c | 131 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 132 | * @net: network namespace (must be default network) |
b97bf3fd PL |
133 | * @sock: pre-allocated socket structure |
134 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 135 | * @kern: caused by kernel or by userspace? |
c4307285 | 136 | * |
0c3141e9 AS |
137 | * This routine creates additional data structures used by the TIPC socket, |
138 | * initializes them, and links them together. | |
b97bf3fd PL |
139 | * |
140 | * Returns 0 on success, errno otherwise | |
141 | */ | |
58ed9442 JPM |
142 | static int tipc_sk_create(struct net *net, struct socket *sock, |
143 | int protocol, int kern) | |
b97bf3fd | 144 | { |
0c3141e9 AS |
145 | const struct proto_ops *ops; |
146 | socket_state state; | |
b97bf3fd | 147 | struct sock *sk; |
58ed9442 JPM |
148 | struct tipc_sock *tsk; |
149 | struct tipc_port *port; | |
150 | u32 ref; | |
0c3141e9 AS |
151 | |
152 | /* Validate arguments */ | |
b97bf3fd PL |
153 | if (unlikely(protocol != 0)) |
154 | return -EPROTONOSUPPORT; | |
155 | ||
b97bf3fd PL |
156 | switch (sock->type) { |
157 | case SOCK_STREAM: | |
0c3141e9 AS |
158 | ops = &stream_ops; |
159 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
160 | break; |
161 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
162 | ops = &packet_ops; |
163 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
164 | break; |
165 | case SOCK_DGRAM: | |
b97bf3fd | 166 | case SOCK_RDM: |
0c3141e9 AS |
167 | ops = &msg_ops; |
168 | state = SS_READY; | |
b97bf3fd | 169 | break; |
49978651 | 170 | default: |
49978651 | 171 | return -EPROTOTYPE; |
b97bf3fd PL |
172 | } |
173 | ||
0c3141e9 | 174 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
175 | if (!kern) |
176 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
177 | else | |
178 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
179 | ||
0c3141e9 | 180 | if (sk == NULL) |
b97bf3fd | 181 | return -ENOMEM; |
b97bf3fd | 182 | |
58ed9442 JPM |
183 | tsk = tipc_sk(sk); |
184 | port = &tsk->port; | |
185 | ||
186 | ref = tipc_port_init(port, TIPC_LOW_IMPORTANCE); | |
187 | if (!ref) { | |
188 | pr_warn("Socket registration failed, ref. table exhausted\n"); | |
0c3141e9 AS |
189 | sk_free(sk); |
190 | return -ENOMEM; | |
191 | } | |
b97bf3fd | 192 | |
0c3141e9 | 193 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
194 | sock->ops = ops; |
195 | sock->state = state; | |
b97bf3fd | 196 | |
0c3141e9 | 197 | sock_init_data(sock, sk); |
0c3141e9 | 198 | sk->sk_backlog_rcv = backlog_rcv; |
cc79dd1b | 199 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
200 | sk->sk_data_ready = tipc_data_ready; |
201 | sk->sk_write_space = tipc_write_space; | |
a0f40f02 | 202 | tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT; |
58ed9442 | 203 | tipc_port_unlock(port); |
7ef43eba | 204 | |
0c3141e9 | 205 | if (sock->state == SS_READY) { |
58ed9442 | 206 | tipc_port_set_unreturnable(port, true); |
0c3141e9 | 207 | if (sock->type == SOCK_DGRAM) |
58ed9442 | 208 | tipc_port_set_unreliable(port, true); |
0c3141e9 | 209 | } |
b97bf3fd PL |
210 | return 0; |
211 | } | |
212 | ||
c5fa7b3c YX |
213 | /** |
214 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
215 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
216 | * | |
217 | * We cannot use sock_creat_kern here because it bumps module user count. | |
218 | * Since socket owner and creator is the same module we must make sure | |
219 | * that module count remains zero for module local sockets, otherwise | |
220 | * we cannot do rmmod. | |
221 | * | |
222 | * Returns 0 on success, errno otherwise | |
223 | */ | |
224 | int tipc_sock_create_local(int type, struct socket **res) | |
225 | { | |
226 | int rc; | |
c5fa7b3c YX |
227 | |
228 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
229 | if (rc < 0) { | |
230 | pr_err("Failed to create kernel socket\n"); | |
231 | return rc; | |
232 | } | |
233 | tipc_sk_create(&init_net, *res, 0, 1); | |
234 | ||
c5fa7b3c YX |
235 | return 0; |
236 | } | |
237 | ||
238 | /** | |
239 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
240 | * @sock: the socket to be released. | |
241 | * | |
242 | * Module reference count is not incremented when such sockets are created, | |
243 | * so we must keep it from being decremented when they are released. | |
244 | */ | |
245 | void tipc_sock_release_local(struct socket *sock) | |
246 | { | |
247f0f3c | 247 | tipc_release(sock); |
c5fa7b3c YX |
248 | sock->ops = NULL; |
249 | sock_release(sock); | |
250 | } | |
251 | ||
252 | /** | |
253 | * tipc_sock_accept_local - accept a connection on a socket created | |
254 | * with tipc_sock_create_local. Use this function to avoid that | |
255 | * module reference count is inadvertently incremented. | |
256 | * | |
257 | * @sock: the accepting socket | |
258 | * @newsock: reference to the new socket to be created | |
259 | * @flags: socket flags | |
260 | */ | |
261 | ||
262 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 263 | int flags) |
c5fa7b3c YX |
264 | { |
265 | struct sock *sk = sock->sk; | |
266 | int ret; | |
267 | ||
268 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
269 | sk->sk_protocol, newsock); | |
270 | if (ret < 0) | |
271 | return ret; | |
272 | ||
247f0f3c | 273 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
274 | if (ret < 0) { |
275 | sock_release(*newsock); | |
276 | return ret; | |
277 | } | |
278 | (*newsock)->ops = sock->ops; | |
279 | return ret; | |
280 | } | |
281 | ||
b97bf3fd | 282 | /** |
247f0f3c | 283 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
284 | * @sock: socket to destroy |
285 | * | |
286 | * This routine cleans up any messages that are still queued on the socket. | |
287 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
288 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
289 | * and any others are discarded. (If the first message on a STREAM socket | |
290 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 291 | * |
b97bf3fd PL |
292 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
293 | * are returned or discarded according to the "destination droppable" setting | |
294 | * specified for the message by the sender. | |
295 | * | |
296 | * Returns 0 on success, errno otherwise | |
297 | */ | |
247f0f3c | 298 | static int tipc_release(struct socket *sock) |
b97bf3fd | 299 | { |
b97bf3fd | 300 | struct sock *sk = sock->sk; |
58ed9442 JPM |
301 | struct tipc_sock *tsk; |
302 | struct tipc_port *port; | |
b97bf3fd | 303 | struct sk_buff *buf; |
0c3141e9 | 304 | int res; |
b97bf3fd | 305 | |
0c3141e9 AS |
306 | /* |
307 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
308 | * releases a pre-allocated child socket that was never used) | |
309 | */ | |
0c3141e9 | 310 | if (sk == NULL) |
b97bf3fd | 311 | return 0; |
c4307285 | 312 | |
58ed9442 JPM |
313 | tsk = tipc_sk(sk); |
314 | port = &tsk->port; | |
0c3141e9 AS |
315 | lock_sock(sk); |
316 | ||
317 | /* | |
318 | * Reject all unreceived messages, except on an active connection | |
319 | * (which disconnects locally & sends a 'FIN+' to peer) | |
320 | */ | |
b97bf3fd | 321 | while (sock->state != SS_DISCONNECTING) { |
0c3141e9 AS |
322 | buf = __skb_dequeue(&sk->sk_receive_queue); |
323 | if (buf == NULL) | |
b97bf3fd | 324 | break; |
40682432 | 325 | if (TIPC_SKB_CB(buf)->handle != NULL) |
5f6d9123 | 326 | kfree_skb(buf); |
0c3141e9 AS |
327 | else { |
328 | if ((sock->state == SS_CONNECTING) || | |
329 | (sock->state == SS_CONNECTED)) { | |
330 | sock->state = SS_DISCONNECTING; | |
58ed9442 | 331 | tipc_port_disconnect(port->ref); |
0c3141e9 | 332 | } |
b97bf3fd | 333 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
0c3141e9 | 334 | } |
b97bf3fd PL |
335 | } |
336 | ||
58ed9442 JPM |
337 | /* Destroy TIPC port; also disconnects an active connection and |
338 | * sends a 'FIN-' to peer. | |
0c3141e9 | 339 | */ |
58ed9442 | 340 | tipc_port_destroy(port); |
b97bf3fd | 341 | |
0c3141e9 | 342 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 343 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 344 | |
0c3141e9 | 345 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
346 | sock->state = SS_DISCONNECTING; |
347 | release_sock(sk); | |
b97bf3fd PL |
348 | |
349 | sock_put(sk); | |
0c3141e9 | 350 | sock->sk = NULL; |
b97bf3fd | 351 | |
b97bf3fd PL |
352 | return res; |
353 | } | |
354 | ||
355 | /** | |
247f0f3c | 356 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
357 | * @sock: socket structure |
358 | * @uaddr: socket address describing name(s) and desired operation | |
359 | * @uaddr_len: size of socket address data structure | |
c4307285 | 360 | * |
b97bf3fd PL |
361 | * Name and name sequence binding is indicated using a positive scope value; |
362 | * a negative scope value unbinds the specified name. Specifying no name | |
363 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 364 | * |
b97bf3fd | 365 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
366 | * |
367 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
368 | * access any non-constant socket information. | |
b97bf3fd | 369 | */ |
247f0f3c YX |
370 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
371 | int uaddr_len) | |
b97bf3fd | 372 | { |
84602761 | 373 | struct sock *sk = sock->sk; |
b97bf3fd | 374 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 375 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 376 | int res = -EINVAL; |
b97bf3fd | 377 | |
84602761 YX |
378 | lock_sock(sk); |
379 | if (unlikely(!uaddr_len)) { | |
58ed9442 | 380 | res = tipc_withdraw(&tsk->port, 0, NULL); |
84602761 YX |
381 | goto exit; |
382 | } | |
c4307285 | 383 | |
84602761 YX |
384 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
385 | res = -EINVAL; | |
386 | goto exit; | |
387 | } | |
388 | if (addr->family != AF_TIPC) { | |
389 | res = -EAFNOSUPPORT; | |
390 | goto exit; | |
391 | } | |
b97bf3fd | 392 | |
b97bf3fd PL |
393 | if (addr->addrtype == TIPC_ADDR_NAME) |
394 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
395 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
396 | res = -EAFNOSUPPORT; | |
397 | goto exit; | |
398 | } | |
c4307285 | 399 | |
13a2e898 | 400 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 401 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
402 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
403 | res = -EACCES; | |
404 | goto exit; | |
405 | } | |
c422f1bd | 406 | |
84602761 | 407 | res = (addr->scope > 0) ? |
58ed9442 JPM |
408 | tipc_publish(&tsk->port, addr->scope, &addr->addr.nameseq) : |
409 | tipc_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
410 | exit: |
411 | release_sock(sk); | |
412 | return res; | |
b97bf3fd PL |
413 | } |
414 | ||
c4307285 | 415 | /** |
247f0f3c | 416 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
417 | * @sock: socket structure |
418 | * @uaddr: area for returned socket address | |
419 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 420 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 421 | * |
b97bf3fd | 422 | * Returns 0 on success, errno otherwise |
0c3141e9 | 423 | * |
2da59918 AS |
424 | * NOTE: This routine doesn't need to take the socket lock since it only |
425 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 426 | * a completely predictable manner). |
b97bf3fd | 427 | */ |
247f0f3c YX |
428 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
429 | int *uaddr_len, int peer) | |
b97bf3fd | 430 | { |
b97bf3fd | 431 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 432 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
b97bf3fd | 433 | |
88f8a5e3 | 434 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 435 | if (peer) { |
2da59918 AS |
436 | if ((sock->state != SS_CONNECTED) && |
437 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
438 | return -ENOTCONN; | |
58ed9442 JPM |
439 | addr->addr.id.ref = tipc_port_peerport(&tsk->port); |
440 | addr->addr.id.node = tipc_port_peernode(&tsk->port); | |
0c3141e9 | 441 | } else { |
58ed9442 | 442 | addr->addr.id.ref = tsk->port.ref; |
b924dcf0 | 443 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 444 | } |
b97bf3fd PL |
445 | |
446 | *uaddr_len = sizeof(*addr); | |
447 | addr->addrtype = TIPC_ADDR_ID; | |
448 | addr->family = AF_TIPC; | |
449 | addr->scope = 0; | |
b97bf3fd PL |
450 | addr->addr.name.domain = 0; |
451 | ||
0c3141e9 | 452 | return 0; |
b97bf3fd PL |
453 | } |
454 | ||
455 | /** | |
247f0f3c | 456 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
457 | * @file: file structure associated with the socket |
458 | * @sock: socket for which to calculate the poll bits | |
459 | * @wait: ??? | |
460 | * | |
9b674e82 AS |
461 | * Returns pollmask value |
462 | * | |
463 | * COMMENTARY: | |
464 | * It appears that the usual socket locking mechanisms are not useful here | |
465 | * since the pollmask info is potentially out-of-date the moment this routine | |
466 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
467 | * to handle any preventable race conditions, so TIPC will do the same ... | |
468 | * | |
469 | * TIPC sets the returned events as follows: | |
f662c070 AS |
470 | * |
471 | * socket state flags set | |
472 | * ------------ --------- | |
473 | * unconnected no read flags | |
c4fc298a | 474 | * POLLOUT if port is not congested |
f662c070 AS |
475 | * |
476 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
477 | * no write flags | |
478 | * | |
479 | * connected POLLIN/POLLRDNORM if data in rx queue | |
480 | * POLLOUT if port is not congested | |
481 | * | |
482 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
483 | * no write flags | |
484 | * | |
485 | * listening POLLIN if SYN in rx queue | |
486 | * no write flags | |
487 | * | |
488 | * ready POLLIN/POLLRDNORM if data in rx queue | |
489 | * [connectionless] POLLOUT (since port cannot be congested) | |
490 | * | |
491 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
492 | * imply that the operation will succeed, merely that it should be performed | |
493 | * and will not block. | |
b97bf3fd | 494 | */ |
247f0f3c YX |
495 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
496 | poll_table *wait) | |
b97bf3fd | 497 | { |
9b674e82 | 498 | struct sock *sk = sock->sk; |
58ed9442 | 499 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 500 | u32 mask = 0; |
9b674e82 | 501 | |
f288bef4 | 502 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 503 | |
f662c070 | 504 | switch ((int)sock->state) { |
c4fc298a | 505 | case SS_UNCONNECTED: |
58ed9442 | 506 | if (!tsk->port.congested) |
c4fc298a EH |
507 | mask |= POLLOUT; |
508 | break; | |
f662c070 AS |
509 | case SS_READY: |
510 | case SS_CONNECTED: | |
58ed9442 | 511 | if (!tsk->port.congested) |
f662c070 AS |
512 | mask |= POLLOUT; |
513 | /* fall thru' */ | |
514 | case SS_CONNECTING: | |
515 | case SS_LISTENING: | |
516 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
517 | mask |= (POLLIN | POLLRDNORM); | |
518 | break; | |
519 | case SS_DISCONNECTING: | |
520 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
521 | break; | |
522 | } | |
9b674e82 AS |
523 | |
524 | return mask; | |
b97bf3fd PL |
525 | } |
526 | ||
c4307285 | 527 | /** |
b97bf3fd PL |
528 | * dest_name_check - verify user is permitted to send to specified port name |
529 | * @dest: destination address | |
530 | * @m: descriptor for message to be sent | |
c4307285 | 531 | * |
b97bf3fd PL |
532 | * Prevents restricted configuration commands from being issued by |
533 | * unauthorized users. | |
c4307285 | 534 | * |
b97bf3fd PL |
535 | * Returns 0 if permission is granted, otherwise errno |
536 | */ | |
05790c64 | 537 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
b97bf3fd PL |
538 | { |
539 | struct tipc_cfg_msg_hdr hdr; | |
540 | ||
c4307285 YH |
541 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
542 | return 0; | |
543 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) | |
544 | return 0; | |
c4307285 YH |
545 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
546 | return -EACCES; | |
b97bf3fd | 547 | |
3f8dd944 AS |
548 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
549 | return -EMSGSIZE; | |
c4307285 | 550 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
b97bf3fd | 551 | return -EFAULT; |
70cb2347 | 552 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
b97bf3fd | 553 | return -EACCES; |
c4307285 | 554 | |
b97bf3fd PL |
555 | return 0; |
556 | } | |
557 | ||
3f40504f YX |
558 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
559 | { | |
560 | struct sock *sk = sock->sk; | |
58ed9442 | 561 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
562 | DEFINE_WAIT(wait); |
563 | int done; | |
564 | ||
565 | do { | |
566 | int err = sock_error(sk); | |
567 | if (err) | |
568 | return err; | |
569 | if (sock->state == SS_DISCONNECTING) | |
570 | return -EPIPE; | |
571 | if (!*timeo_p) | |
572 | return -EAGAIN; | |
573 | if (signal_pending(current)) | |
574 | return sock_intr_errno(*timeo_p); | |
575 | ||
576 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
58ed9442 | 577 | done = sk_wait_event(sk, timeo_p, !tsk->port.congested); |
3f40504f YX |
578 | finish_wait(sk_sleep(sk), &wait); |
579 | } while (!done); | |
580 | return 0; | |
581 | } | |
582 | ||
58ed9442 | 583 | |
b97bf3fd | 584 | /** |
247f0f3c | 585 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 586 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
587 | * @sock: socket structure |
588 | * @m: message to send | |
e9024f0f | 589 | * @total_len: length of message |
c4307285 | 590 | * |
b97bf3fd | 591 | * Message must have an destination specified explicitly. |
c4307285 | 592 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
593 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
594 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 595 | * |
b97bf3fd PL |
596 | * Returns the number of bytes sent on success, or errno otherwise |
597 | */ | |
247f0f3c YX |
598 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
599 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 600 | { |
0c3141e9 | 601 | struct sock *sk = sock->sk; |
58ed9442 | 602 | struct tipc_sock *tsk = tipc_sk(sk); |
5c311421 | 603 | struct tipc_port *port = &tsk->port; |
342dfc30 | 604 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
b97bf3fd | 605 | int needs_conn; |
3f40504f | 606 | long timeo; |
b97bf3fd PL |
607 | int res = -EINVAL; |
608 | ||
609 | if (unlikely(!dest)) | |
610 | return -EDESTADDRREQ; | |
51f9cc1f AS |
611 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
612 | (dest->family != AF_TIPC))) | |
b97bf3fd | 613 | return -EINVAL; |
97f8b87e | 614 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 615 | return -EMSGSIZE; |
b97bf3fd | 616 | |
0c3141e9 AS |
617 | if (iocb) |
618 | lock_sock(sk); | |
619 | ||
b97bf3fd PL |
620 | needs_conn = (sock->state != SS_READY); |
621 | if (unlikely(needs_conn)) { | |
0c3141e9 AS |
622 | if (sock->state == SS_LISTENING) { |
623 | res = -EPIPE; | |
624 | goto exit; | |
625 | } | |
626 | if (sock->state != SS_UNCONNECTED) { | |
627 | res = -EISCONN; | |
628 | goto exit; | |
629 | } | |
58ed9442 | 630 | if (tsk->port.published) { |
0c3141e9 AS |
631 | res = -EOPNOTSUPP; |
632 | goto exit; | |
633 | } | |
3388007b | 634 | if (dest->addrtype == TIPC_ADDR_NAME) { |
58ed9442 JPM |
635 | tsk->port.conn_type = dest->addr.name.name.type; |
636 | tsk->port.conn_instance = dest->addr.name.name.instance; | |
3388007b | 637 | } |
b97bf3fd PL |
638 | |
639 | /* Abort any pending connection attempts (very unlikely) */ | |
0c3141e9 | 640 | reject_rx_queue(sk); |
b97bf3fd PL |
641 | } |
642 | ||
3f40504f | 643 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 YH |
644 | do { |
645 | if (dest->addrtype == TIPC_ADDR_NAME) { | |
2db9983a AS |
646 | res = dest_name_check(dest, m); |
647 | if (res) | |
0c3141e9 | 648 | break; |
5c311421 | 649 | res = tipc_send2name(port, |
c4307285 YH |
650 | &dest->addr.name.name, |
651 | dest->addr.name.domain, | |
26896904 AS |
652 | m->msg_iov, |
653 | total_len); | |
0e65967e | 654 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
5c311421 | 655 | res = tipc_send2port(port, |
c4307285 | 656 | &dest->addr.id, |
26896904 AS |
657 | m->msg_iov, |
658 | total_len); | |
0e65967e | 659 | } else if (dest->addrtype == TIPC_ADDR_MCAST) { |
b97bf3fd PL |
660 | if (needs_conn) { |
661 | res = -EOPNOTSUPP; | |
0c3141e9 | 662 | break; |
b97bf3fd | 663 | } |
2db9983a AS |
664 | res = dest_name_check(dest, m); |
665 | if (res) | |
0c3141e9 | 666 | break; |
5c311421 | 667 | res = tipc_port_mcast_xmit(port, |
247f0f3c YX |
668 | &dest->addr.nameseq, |
669 | m->msg_iov, | |
670 | total_len); | |
c4307285 YH |
671 | } |
672 | if (likely(res != -ELINKCONG)) { | |
a016892c | 673 | if (needs_conn && (res >= 0)) |
0c3141e9 | 674 | sock->state = SS_CONNECTING; |
0c3141e9 | 675 | break; |
c4307285 | 676 | } |
3f40504f YX |
677 | res = tipc_wait_for_sndmsg(sock, &timeo); |
678 | if (res) | |
0c3141e9 | 679 | break; |
c4307285 | 680 | } while (1); |
0c3141e9 AS |
681 | |
682 | exit: | |
683 | if (iocb) | |
684 | release_sock(sk); | |
685 | return res; | |
b97bf3fd PL |
686 | } |
687 | ||
391a6dd1 YX |
688 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
689 | { | |
690 | struct sock *sk = sock->sk; | |
58ed9442 JPM |
691 | struct tipc_sock *tsk = tipc_sk(sk); |
692 | struct tipc_port *port = &tsk->port; | |
391a6dd1 YX |
693 | DEFINE_WAIT(wait); |
694 | int done; | |
695 | ||
696 | do { | |
697 | int err = sock_error(sk); | |
698 | if (err) | |
699 | return err; | |
700 | if (sock->state == SS_DISCONNECTING) | |
701 | return -EPIPE; | |
702 | else if (sock->state != SS_CONNECTED) | |
703 | return -ENOTCONN; | |
704 | if (!*timeo_p) | |
705 | return -EAGAIN; | |
706 | if (signal_pending(current)) | |
707 | return sock_intr_errno(*timeo_p); | |
708 | ||
709 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
710 | done = sk_wait_event(sk, timeo_p, | |
58ed9442 | 711 | (!port->congested || !port->connected)); |
391a6dd1 YX |
712 | finish_wait(sk_sleep(sk), &wait); |
713 | } while (!done); | |
714 | return 0; | |
715 | } | |
716 | ||
c4307285 | 717 | /** |
247f0f3c | 718 | * tipc_send_packet - send a connection-oriented message |
0c3141e9 | 719 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
720 | * @sock: socket structure |
721 | * @m: message to send | |
e9024f0f | 722 | * @total_len: length of message |
c4307285 | 723 | * |
b97bf3fd | 724 | * Used for SOCK_SEQPACKET messages and SOCK_STREAM data. |
c4307285 | 725 | * |
b97bf3fd PL |
726 | * Returns the number of bytes sent on success, or errno otherwise |
727 | */ | |
247f0f3c YX |
728 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
729 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 730 | { |
0c3141e9 | 731 | struct sock *sk = sock->sk; |
58ed9442 | 732 | struct tipc_sock *tsk = tipc_sk(sk); |
342dfc30 | 733 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
391a6dd1 YX |
734 | int res = -EINVAL; |
735 | long timeo; | |
b97bf3fd PL |
736 | |
737 | /* Handle implied connection establishment */ | |
b97bf3fd | 738 | if (unlikely(dest)) |
247f0f3c | 739 | return tipc_sendmsg(iocb, sock, m, total_len); |
b97bf3fd | 740 | |
97f8b87e | 741 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 AS |
742 | return -EMSGSIZE; |
743 | ||
0c3141e9 AS |
744 | if (iocb) |
745 | lock_sock(sk); | |
b97bf3fd | 746 | |
391a6dd1 YX |
747 | if (unlikely(sock->state != SS_CONNECTED)) { |
748 | if (sock->state == SS_DISCONNECTING) | |
749 | res = -EPIPE; | |
750 | else | |
751 | res = -ENOTCONN; | |
752 | goto exit; | |
753 | } | |
1d835874 | 754 | |
391a6dd1 | 755 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 | 756 | do { |
5c311421 | 757 | res = tipc_send(&tsk->port, m->msg_iov, total_len); |
a016892c | 758 | if (likely(res != -ELINKCONG)) |
0c3141e9 | 759 | break; |
391a6dd1 YX |
760 | res = tipc_wait_for_sndpkt(sock, &timeo); |
761 | if (res) | |
0c3141e9 | 762 | break; |
c4307285 | 763 | } while (1); |
391a6dd1 | 764 | exit: |
0c3141e9 AS |
765 | if (iocb) |
766 | release_sock(sk); | |
767 | return res; | |
b97bf3fd PL |
768 | } |
769 | ||
c4307285 | 770 | /** |
247f0f3c | 771 | * tipc_send_stream - send stream-oriented data |
b97bf3fd PL |
772 | * @iocb: (unused) |
773 | * @sock: socket structure | |
774 | * @m: data to send | |
775 | * @total_len: total length of data to be sent | |
c4307285 | 776 | * |
b97bf3fd | 777 | * Used for SOCK_STREAM data. |
c4307285 YH |
778 | * |
779 | * Returns the number of bytes sent on success (or partial success), | |
1303e8f1 | 780 | * or errno if no data sent |
b97bf3fd | 781 | */ |
247f0f3c YX |
782 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
783 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 784 | { |
0c3141e9 | 785 | struct sock *sk = sock->sk; |
58ed9442 | 786 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
787 | struct msghdr my_msg; |
788 | struct iovec my_iov; | |
789 | struct iovec *curr_iov; | |
790 | int curr_iovlen; | |
791 | char __user *curr_start; | |
05646c91 | 792 | u32 hdr_size; |
b97bf3fd PL |
793 | int curr_left; |
794 | int bytes_to_send; | |
1303e8f1 | 795 | int bytes_sent; |
b97bf3fd | 796 | int res; |
c4307285 | 797 | |
0c3141e9 AS |
798 | lock_sock(sk); |
799 | ||
05646c91 | 800 | /* Handle special cases where there is no connection */ |
c4307285 | 801 | if (unlikely(sock->state != SS_CONNECTED)) { |
3b8401fe | 802 | if (sock->state == SS_UNCONNECTED) |
247f0f3c | 803 | res = tipc_send_packet(NULL, sock, m, total_len); |
b0555976 | 804 | else |
805 | res = sock->state == SS_DISCONNECTING ? -EPIPE : -ENOTCONN; | |
3b8401fe | 806 | goto exit; |
c4307285 | 807 | } |
b97bf3fd | 808 | |
0c3141e9 AS |
809 | if (unlikely(m->msg_name)) { |
810 | res = -EISCONN; | |
811 | goto exit; | |
812 | } | |
eb5959c2 | 813 | |
97f8b87e | 814 | if (total_len > (unsigned int)INT_MAX) { |
c29c3f70 AS |
815 | res = -EMSGSIZE; |
816 | goto exit; | |
817 | } | |
818 | ||
c4307285 | 819 | /* |
b97bf3fd PL |
820 | * Send each iovec entry using one or more messages |
821 | * | |
c4307285 | 822 | * Note: This algorithm is good for the most likely case |
b97bf3fd PL |
823 | * (i.e. one large iovec entry), but could be improved to pass sets |
824 | * of small iovec entries into send_packet(). | |
825 | */ | |
1303e8f1 AS |
826 | curr_iov = m->msg_iov; |
827 | curr_iovlen = m->msg_iovlen; | |
b97bf3fd PL |
828 | my_msg.msg_iov = &my_iov; |
829 | my_msg.msg_iovlen = 1; | |
eb5959c2 AS |
830 | my_msg.msg_flags = m->msg_flags; |
831 | my_msg.msg_name = NULL; | |
1303e8f1 | 832 | bytes_sent = 0; |
b97bf3fd | 833 | |
58ed9442 | 834 | hdr_size = msg_hdr_sz(&tsk->port.phdr); |
05646c91 | 835 | |
b97bf3fd PL |
836 | while (curr_iovlen--) { |
837 | curr_start = curr_iov->iov_base; | |
838 | curr_left = curr_iov->iov_len; | |
839 | ||
840 | while (curr_left) { | |
58ed9442 | 841 | bytes_to_send = tsk->port.max_pkt - hdr_size; |
05646c91 AS |
842 | if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE) |
843 | bytes_to_send = TIPC_MAX_USER_MSG_SIZE; | |
844 | if (curr_left < bytes_to_send) | |
845 | bytes_to_send = curr_left; | |
b97bf3fd PL |
846 | my_iov.iov_base = curr_start; |
847 | my_iov.iov_len = bytes_to_send; | |
247f0f3c YX |
848 | res = tipc_send_packet(NULL, sock, &my_msg, |
849 | bytes_to_send); | |
2db9983a | 850 | if (res < 0) { |
0c3141e9 | 851 | if (bytes_sent) |
05646c91 | 852 | res = bytes_sent; |
0c3141e9 | 853 | goto exit; |
1303e8f1 | 854 | } |
b97bf3fd PL |
855 | curr_left -= bytes_to_send; |
856 | curr_start += bytes_to_send; | |
1303e8f1 | 857 | bytes_sent += bytes_to_send; |
b97bf3fd PL |
858 | } |
859 | ||
860 | curr_iov++; | |
861 | } | |
0c3141e9 AS |
862 | res = bytes_sent; |
863 | exit: | |
864 | release_sock(sk); | |
865 | return res; | |
b97bf3fd PL |
866 | } |
867 | ||
868 | /** | |
869 | * auto_connect - complete connection setup to a remote port | |
58ed9442 | 870 | * @tsk: tipc socket structure |
b97bf3fd | 871 | * @msg: peer's response message |
c4307285 | 872 | * |
b97bf3fd PL |
873 | * Returns 0 on success, errno otherwise |
874 | */ | |
58ed9442 | 875 | static int auto_connect(struct tipc_sock *tsk, struct tipc_msg *msg) |
b97bf3fd | 876 | { |
58ed9442 JPM |
877 | struct tipc_port *port = &tsk->port; |
878 | struct socket *sock = tsk->sk.sk_socket; | |
f9fef18c JPM |
879 | struct tipc_portid peer; |
880 | ||
881 | peer.ref = msg_origport(msg); | |
882 | peer.node = msg_orignode(msg); | |
b97bf3fd | 883 | |
58ed9442 | 884 | __tipc_port_connect(port->ref, port, &peer); |
584d24b3 YX |
885 | |
886 | if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE) | |
887 | return -EINVAL; | |
58ed9442 | 888 | msg_set_importance(&port->phdr, (u32)msg_importance(msg)); |
b97bf3fd PL |
889 | sock->state = SS_CONNECTED; |
890 | return 0; | |
891 | } | |
892 | ||
893 | /** | |
894 | * set_orig_addr - capture sender's address for received message | |
895 | * @m: descriptor for message info | |
896 | * @msg: received message header | |
c4307285 | 897 | * |
b97bf3fd PL |
898 | * Note: Address is not captured if not requested by receiver. |
899 | */ | |
05790c64 | 900 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 901 | { |
342dfc30 | 902 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 903 | |
c4307285 | 904 | if (addr) { |
b97bf3fd PL |
905 | addr->family = AF_TIPC; |
906 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 907 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
908 | addr->addr.id.ref = msg_origport(msg); |
909 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
910 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
911 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
912 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
913 | } | |
914 | } | |
915 | ||
916 | /** | |
c4307285 | 917 | * anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
918 | * @m: descriptor for message info |
919 | * @msg: received message header | |
920 | * @tport: TIPC port associated with message | |
c4307285 | 921 | * |
b97bf3fd | 922 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 923 | * |
b97bf3fd PL |
924 | * Returns 0 if successful, otherwise errno |
925 | */ | |
05790c64 | 926 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
ae8509c4 | 927 | struct tipc_port *tport) |
b97bf3fd PL |
928 | { |
929 | u32 anc_data[3]; | |
930 | u32 err; | |
931 | u32 dest_type; | |
3546c750 | 932 | int has_name; |
b97bf3fd PL |
933 | int res; |
934 | ||
935 | if (likely(m->msg_controllen == 0)) | |
936 | return 0; | |
937 | ||
938 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
939 | err = msg ? msg_errcode(msg) : 0; |
940 | if (unlikely(err)) { | |
941 | anc_data[0] = err; | |
942 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
943 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
944 | if (res) | |
b97bf3fd | 945 | return res; |
2db9983a AS |
946 | if (anc_data[1]) { |
947 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
948 | msg_data(msg)); | |
949 | if (res) | |
950 | return res; | |
951 | } | |
b97bf3fd PL |
952 | } |
953 | ||
954 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
955 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
956 | switch (dest_type) { | |
957 | case TIPC_NAMED_MSG: | |
3546c750 | 958 | has_name = 1; |
b97bf3fd PL |
959 | anc_data[0] = msg_nametype(msg); |
960 | anc_data[1] = msg_namelower(msg); | |
961 | anc_data[2] = msg_namelower(msg); | |
962 | break; | |
963 | case TIPC_MCAST_MSG: | |
3546c750 | 964 | has_name = 1; |
b97bf3fd PL |
965 | anc_data[0] = msg_nametype(msg); |
966 | anc_data[1] = msg_namelower(msg); | |
967 | anc_data[2] = msg_nameupper(msg); | |
968 | break; | |
969 | case TIPC_CONN_MSG: | |
3546c750 | 970 | has_name = (tport->conn_type != 0); |
b97bf3fd PL |
971 | anc_data[0] = tport->conn_type; |
972 | anc_data[1] = tport->conn_instance; | |
973 | anc_data[2] = tport->conn_instance; | |
974 | break; | |
975 | default: | |
3546c750 | 976 | has_name = 0; |
b97bf3fd | 977 | } |
2db9983a AS |
978 | if (has_name) { |
979 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
980 | if (res) | |
981 | return res; | |
982 | } | |
b97bf3fd PL |
983 | |
984 | return 0; | |
985 | } | |
986 | ||
9bbb4ecc YX |
987 | static int tipc_wait_for_rcvmsg(struct socket *sock, long timeo) |
988 | { | |
989 | struct sock *sk = sock->sk; | |
990 | DEFINE_WAIT(wait); | |
991 | int err; | |
992 | ||
993 | for (;;) { | |
994 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 995 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
996 | if (sock->state == SS_DISCONNECTING) { |
997 | err = -ENOTCONN; | |
998 | break; | |
999 | } | |
1000 | release_sock(sk); | |
1001 | timeo = schedule_timeout(timeo); | |
1002 | lock_sock(sk); | |
1003 | } | |
1004 | err = 0; | |
1005 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1006 | break; | |
1007 | err = sock_intr_errno(timeo); | |
1008 | if (signal_pending(current)) | |
1009 | break; | |
1010 | err = -EAGAIN; | |
1011 | if (!timeo) | |
1012 | break; | |
1013 | } | |
1014 | finish_wait(sk_sleep(sk), &wait); | |
1015 | return err; | |
1016 | } | |
1017 | ||
c4307285 | 1018 | /** |
247f0f3c | 1019 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1020 | * @iocb: (unused) |
1021 | * @m: descriptor for message info | |
1022 | * @buf_len: total size of user buffer area | |
1023 | * @flags: receive flags | |
c4307285 | 1024 | * |
b97bf3fd PL |
1025 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1026 | * If the complete message doesn't fit in user area, truncate it. | |
1027 | * | |
1028 | * Returns size of returned message data, errno otherwise | |
1029 | */ | |
247f0f3c YX |
1030 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1031 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1032 | { |
0c3141e9 | 1033 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1034 | struct tipc_sock *tsk = tipc_sk(sk); |
1035 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1036 | struct sk_buff *buf; |
1037 | struct tipc_msg *msg; | |
9bbb4ecc | 1038 | long timeo; |
b97bf3fd PL |
1039 | unsigned int sz; |
1040 | u32 err; | |
1041 | int res; | |
1042 | ||
0c3141e9 | 1043 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1044 | if (unlikely(!buf_len)) |
1045 | return -EINVAL; | |
1046 | ||
0c3141e9 | 1047 | lock_sock(sk); |
b97bf3fd | 1048 | |
0c3141e9 AS |
1049 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1050 | res = -ENOTCONN; | |
b97bf3fd PL |
1051 | goto exit; |
1052 | } | |
1053 | ||
9bbb4ecc | 1054 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1055 | restart: |
b97bf3fd | 1056 | |
0c3141e9 | 1057 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1058 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1059 | if (res) | |
1060 | goto exit; | |
b97bf3fd | 1061 | |
0c3141e9 | 1062 | /* Look at first message in receive queue */ |
0c3141e9 | 1063 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1064 | msg = buf_msg(buf); |
1065 | sz = msg_data_sz(msg); | |
1066 | err = msg_errcode(msg); | |
1067 | ||
b97bf3fd | 1068 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1069 | if ((!sz) && (!err)) { |
0c3141e9 | 1070 | advance_rx_queue(sk); |
b97bf3fd PL |
1071 | goto restart; |
1072 | } | |
1073 | ||
1074 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1075 | set_orig_addr(m, msg); |
1076 | ||
1077 | /* Capture ancillary data (optional) */ | |
58ed9442 | 1078 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1079 | if (res) |
b97bf3fd PL |
1080 | goto exit; |
1081 | ||
1082 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1083 | if (!err) { |
1084 | if (unlikely(buf_len < sz)) { | |
1085 | sz = buf_len; | |
1086 | m->msg_flags |= MSG_TRUNC; | |
1087 | } | |
0232fd0a AS |
1088 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
1089 | m->msg_iov, sz); | |
1090 | if (res) | |
b97bf3fd | 1091 | goto exit; |
b97bf3fd PL |
1092 | res = sz; |
1093 | } else { | |
1094 | if ((sock->state == SS_READY) || | |
1095 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1096 | res = 0; | |
1097 | else | |
1098 | res = -ECONNRESET; | |
1099 | } | |
1100 | ||
1101 | /* Consume received message (optional) */ | |
b97bf3fd | 1102 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1103 | if ((sock->state != SS_READY) && |
58ed9442 JPM |
1104 | (++port->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1105 | tipc_acknowledge(port->ref, port->conn_unacked); | |
0c3141e9 | 1106 | advance_rx_queue(sk); |
c4307285 | 1107 | } |
b97bf3fd | 1108 | exit: |
0c3141e9 | 1109 | release_sock(sk); |
b97bf3fd PL |
1110 | return res; |
1111 | } | |
1112 | ||
c4307285 | 1113 | /** |
247f0f3c | 1114 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1115 | * @iocb: (unused) |
1116 | * @m: descriptor for message info | |
1117 | * @buf_len: total size of user buffer area | |
1118 | * @flags: receive flags | |
c4307285 YH |
1119 | * |
1120 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1121 | * will optionally wait for more; never truncates data. |
1122 | * | |
1123 | * Returns size of returned message data, errno otherwise | |
1124 | */ | |
247f0f3c YX |
1125 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1126 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1127 | { |
0c3141e9 | 1128 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1129 | struct tipc_sock *tsk = tipc_sk(sk); |
1130 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1131 | struct sk_buff *buf; |
1132 | struct tipc_msg *msg; | |
9bbb4ecc | 1133 | long timeo; |
b97bf3fd | 1134 | unsigned int sz; |
3720d40b | 1135 | int sz_to_copy, target, needed; |
b97bf3fd | 1136 | int sz_copied = 0; |
b97bf3fd | 1137 | u32 err; |
0c3141e9 | 1138 | int res = 0; |
b97bf3fd | 1139 | |
0c3141e9 | 1140 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1141 | if (unlikely(!buf_len)) |
1142 | return -EINVAL; | |
1143 | ||
0c3141e9 | 1144 | lock_sock(sk); |
b97bf3fd | 1145 | |
9bbb4ecc | 1146 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1147 | res = -ENOTCONN; |
b97bf3fd PL |
1148 | goto exit; |
1149 | } | |
1150 | ||
3720d40b | 1151 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1152 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1153 | |
617d3c7a | 1154 | restart: |
0c3141e9 | 1155 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1156 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1157 | if (res) | |
1158 | goto exit; | |
b97bf3fd | 1159 | |
0c3141e9 | 1160 | /* Look at first message in receive queue */ |
0c3141e9 | 1161 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1162 | msg = buf_msg(buf); |
1163 | sz = msg_data_sz(msg); | |
1164 | err = msg_errcode(msg); | |
1165 | ||
1166 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1167 | if ((!sz) && (!err)) { |
0c3141e9 | 1168 | advance_rx_queue(sk); |
b97bf3fd PL |
1169 | goto restart; |
1170 | } | |
1171 | ||
1172 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1173 | if (sz_copied == 0) { |
1174 | set_orig_addr(m, msg); | |
58ed9442 | 1175 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1176 | if (res) |
b97bf3fd PL |
1177 | goto exit; |
1178 | } | |
1179 | ||
1180 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1181 | if (!err) { |
0232fd0a | 1182 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1183 | |
0232fd0a | 1184 | sz -= offset; |
b97bf3fd PL |
1185 | needed = (buf_len - sz_copied); |
1186 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a AS |
1187 | |
1188 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, | |
1189 | m->msg_iov, sz_to_copy); | |
1190 | if (res) | |
b97bf3fd | 1191 | goto exit; |
0232fd0a | 1192 | |
b97bf3fd PL |
1193 | sz_copied += sz_to_copy; |
1194 | ||
1195 | if (sz_to_copy < sz) { | |
1196 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1197 | TIPC_SKB_CB(buf)->handle = |
1198 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1199 | goto exit; |
1200 | } | |
b97bf3fd PL |
1201 | } else { |
1202 | if (sz_copied != 0) | |
1203 | goto exit; /* can't add error msg to valid data */ | |
1204 | ||
1205 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1206 | res = 0; | |
1207 | else | |
1208 | res = -ECONNRESET; | |
1209 | } | |
1210 | ||
1211 | /* Consume received message (optional) */ | |
b97bf3fd | 1212 | if (likely(!(flags & MSG_PEEK))) { |
58ed9442 JPM |
1213 | if (unlikely(++port->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1214 | tipc_acknowledge(port->ref, port->conn_unacked); | |
0c3141e9 | 1215 | advance_rx_queue(sk); |
c4307285 | 1216 | } |
b97bf3fd PL |
1217 | |
1218 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1219 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1220 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1221 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1222 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1223 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1224 | goto restart; |
1225 | ||
1226 | exit: | |
0c3141e9 | 1227 | release_sock(sk); |
a3b0a5a9 | 1228 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1229 | } |
1230 | ||
f288bef4 YX |
1231 | /** |
1232 | * tipc_write_space - wake up thread if port congestion is released | |
1233 | * @sk: socket | |
1234 | */ | |
1235 | static void tipc_write_space(struct sock *sk) | |
1236 | { | |
1237 | struct socket_wq *wq; | |
1238 | ||
1239 | rcu_read_lock(); | |
1240 | wq = rcu_dereference(sk->sk_wq); | |
1241 | if (wq_has_sleeper(wq)) | |
1242 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1243 | POLLWRNORM | POLLWRBAND); | |
1244 | rcu_read_unlock(); | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1249 | * @sk: socket | |
1250 | * @len: the length of messages | |
1251 | */ | |
1252 | static void tipc_data_ready(struct sock *sk, int len) | |
1253 | { | |
1254 | struct socket_wq *wq; | |
1255 | ||
1256 | rcu_read_lock(); | |
1257 | wq = rcu_dereference(sk->sk_wq); | |
1258 | if (wq_has_sleeper(wq)) | |
1259 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1260 | POLLRDNORM | POLLRDBAND); | |
1261 | rcu_read_unlock(); | |
1262 | } | |
1263 | ||
7e6c131e YX |
1264 | /** |
1265 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1266 | * @tsk: TIPC socket |
7e6c131e YX |
1267 | * @msg: message |
1268 | * | |
1269 | * Returns TIPC error status code and socket error status code | |
1270 | * once it encounters some errors | |
1271 | */ | |
58ed9442 | 1272 | static u32 filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
7e6c131e | 1273 | { |
58ed9442 JPM |
1274 | struct sock *sk = &tsk->sk; |
1275 | struct tipc_port *port = &tsk->port; | |
8826cde6 | 1276 | struct socket *sock = sk->sk_socket; |
7e6c131e | 1277 | struct tipc_msg *msg = buf_msg(*buf); |
8826cde6 | 1278 | |
7e6c131e | 1279 | u32 retval = TIPC_ERR_NO_PORT; |
584d24b3 | 1280 | int res; |
7e6c131e YX |
1281 | |
1282 | if (msg_mcast(msg)) | |
1283 | return retval; | |
1284 | ||
1285 | switch ((int)sock->state) { | |
1286 | case SS_CONNECTED: | |
1287 | /* Accept only connection-based messages sent by peer */ | |
8826cde6 | 1288 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
7e6c131e YX |
1289 | if (unlikely(msg_errcode(msg))) { |
1290 | sock->state = SS_DISCONNECTING; | |
8826cde6 | 1291 | __tipc_port_disconnect(port); |
7e6c131e YX |
1292 | } |
1293 | retval = TIPC_OK; | |
1294 | } | |
1295 | break; | |
1296 | case SS_CONNECTING: | |
1297 | /* Accept only ACK or NACK message */ | |
584d24b3 YX |
1298 | if (unlikely(msg_errcode(msg))) { |
1299 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1300 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1301 | retval = TIPC_OK; |
1302 | break; | |
1303 | } | |
1304 | ||
1305 | if (unlikely(!msg_connected(msg))) | |
1306 | break; | |
1307 | ||
58ed9442 | 1308 | res = auto_connect(tsk, msg); |
584d24b3 YX |
1309 | if (res) { |
1310 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1311 | sk->sk_err = -res; |
7e6c131e | 1312 | retval = TIPC_OK; |
584d24b3 YX |
1313 | break; |
1314 | } | |
1315 | ||
1316 | /* If an incoming message is an 'ACK-', it should be | |
1317 | * discarded here because it doesn't contain useful | |
1318 | * data. In addition, we should try to wake up | |
1319 | * connect() routine if sleeping. | |
1320 | */ | |
1321 | if (msg_data_sz(msg) == 0) { | |
1322 | kfree_skb(*buf); | |
1323 | *buf = NULL; | |
1324 | if (waitqueue_active(sk_sleep(sk))) | |
1325 | wake_up_interruptible(sk_sleep(sk)); | |
1326 | } | |
1327 | retval = TIPC_OK; | |
7e6c131e YX |
1328 | break; |
1329 | case SS_LISTENING: | |
1330 | case SS_UNCONNECTED: | |
1331 | /* Accept only SYN message */ | |
1332 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1333 | retval = TIPC_OK; | |
1334 | break; | |
1335 | case SS_DISCONNECTING: | |
1336 | break; | |
1337 | default: | |
1338 | pr_err("Unknown socket state %u\n", sock->state); | |
1339 | } | |
1340 | return retval; | |
1341 | } | |
1342 | ||
aba79f33 YX |
1343 | /** |
1344 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1345 | * @sk: socket | |
1346 | * @buf: message | |
1347 | * | |
1348 | * For all connection oriented messages, irrespective of importance, | |
1349 | * the default overload value (i.e. 67MB) is set as limit. | |
1350 | * | |
1351 | * For all connectionless messages, by default new queue limits are | |
1352 | * as belows: | |
1353 | * | |
cc79dd1b YX |
1354 | * TIPC_LOW_IMPORTANCE (4 MB) |
1355 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1356 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1357 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1358 | * |
1359 | * Returns overload limit according to corresponding message importance | |
1360 | */ | |
1361 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1362 | { | |
1363 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1364 | |
1365 | if (msg_connected(msg)) | |
0cee6bbe | 1366 | return sysctl_tipc_rmem[2]; |
1367 | ||
1368 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1369 | msg_importance(msg); | |
aba79f33 YX |
1370 | } |
1371 | ||
c4307285 | 1372 | /** |
0c3141e9 AS |
1373 | * filter_rcv - validate incoming message |
1374 | * @sk: socket | |
b97bf3fd | 1375 | * @buf: message |
c4307285 | 1376 | * |
0c3141e9 AS |
1377 | * Enqueues message on receive queue if acceptable; optionally handles |
1378 | * disconnect indication for a connected socket. | |
1379 | * | |
1380 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1381 | * |
b97bf3fd PL |
1382 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) |
1383 | */ | |
0c3141e9 | 1384 | static u32 filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1385 | { |
0c3141e9 | 1386 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1387 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd | 1388 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1389 | unsigned int limit = rcvbuf_limit(sk, buf); |
7e6c131e | 1390 | u32 res = TIPC_OK; |
b97bf3fd | 1391 | |
b97bf3fd | 1392 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 AS |
1393 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
1394 | return TIPC_ERR_NO_PORT; | |
0c3141e9 | 1395 | |
b97bf3fd | 1396 | if (sock->state == SS_READY) { |
b29f1428 | 1397 | if (msg_connected(msg)) |
b97bf3fd | 1398 | return TIPC_ERR_NO_PORT; |
b97bf3fd | 1399 | } else { |
58ed9442 | 1400 | res = filter_connect(tsk, &buf); |
7e6c131e YX |
1401 | if (res != TIPC_OK || buf == NULL) |
1402 | return res; | |
b97bf3fd PL |
1403 | } |
1404 | ||
1405 | /* Reject message if there isn't room to queue it */ | |
aba79f33 YX |
1406 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
1407 | return TIPC_ERR_OVERLOAD; | |
b97bf3fd | 1408 | |
aba79f33 | 1409 | /* Enqueue message */ |
40682432 | 1410 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1411 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1412 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1413 | |
f288bef4 | 1414 | sk->sk_data_ready(sk, 0); |
0c3141e9 AS |
1415 | return TIPC_OK; |
1416 | } | |
b97bf3fd | 1417 | |
0c3141e9 AS |
1418 | /** |
1419 | * backlog_rcv - handle incoming message from backlog queue | |
1420 | * @sk: socket | |
1421 | * @buf: message | |
1422 | * | |
1423 | * Caller must hold socket lock, but not port lock. | |
1424 | * | |
1425 | * Returns 0 | |
1426 | */ | |
0c3141e9 AS |
1427 | static int backlog_rcv(struct sock *sk, struct sk_buff *buf) |
1428 | { | |
1429 | u32 res; | |
1430 | ||
1431 | res = filter_rcv(sk, buf); | |
1432 | if (res) | |
1433 | tipc_reject_msg(buf, res); | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | /** | |
24be34b5 JPM |
1438 | * tipc_sk_rcv - handle incoming message |
1439 | * @sk: socket receiving message | |
0c3141e9 AS |
1440 | * @buf: message |
1441 | * | |
1442 | * Called with port lock already taken. | |
1443 | * | |
1444 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) | |
1445 | */ | |
24be34b5 | 1446 | u32 tipc_sk_rcv(struct sock *sk, struct sk_buff *buf) |
0c3141e9 | 1447 | { |
0c3141e9 AS |
1448 | u32 res; |
1449 | ||
1450 | /* | |
1451 | * Process message if socket is unlocked; otherwise add to backlog queue | |
1452 | * | |
1453 | * This code is based on sk_receive_skb(), but must be distinct from it | |
1454 | * since a TIPC-specific filter/reject mechanism is utilized | |
1455 | */ | |
0c3141e9 AS |
1456 | bh_lock_sock(sk); |
1457 | if (!sock_owned_by_user(sk)) { | |
1458 | res = filter_rcv(sk, buf); | |
1459 | } else { | |
aba79f33 | 1460 | if (sk_add_backlog(sk, buf, rcvbuf_limit(sk, buf))) |
53eecb1b ZY |
1461 | res = TIPC_ERR_OVERLOAD; |
1462 | else | |
1463 | res = TIPC_OK; | |
0c3141e9 AS |
1464 | } |
1465 | bh_unlock_sock(sk); | |
1466 | ||
1467 | return res; | |
b97bf3fd PL |
1468 | } |
1469 | ||
78eb3a53 YX |
1470 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1471 | { | |
1472 | struct sock *sk = sock->sk; | |
1473 | DEFINE_WAIT(wait); | |
1474 | int done; | |
1475 | ||
1476 | do { | |
1477 | int err = sock_error(sk); | |
1478 | if (err) | |
1479 | return err; | |
1480 | if (!*timeo_p) | |
1481 | return -ETIMEDOUT; | |
1482 | if (signal_pending(current)) | |
1483 | return sock_intr_errno(*timeo_p); | |
1484 | ||
1485 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1486 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1487 | finish_wait(sk_sleep(sk), &wait); | |
1488 | } while (!done); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
b97bf3fd | 1492 | /** |
247f0f3c | 1493 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1494 | * @sock: socket structure |
1495 | * @dest: socket address for destination port | |
1496 | * @destlen: size of socket address data structure | |
0c3141e9 | 1497 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1498 | * |
1499 | * Returns 0 on success, errno otherwise | |
1500 | */ | |
247f0f3c YX |
1501 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1502 | int destlen, int flags) | |
b97bf3fd | 1503 | { |
0c3141e9 | 1504 | struct sock *sk = sock->sk; |
b89741a0 AS |
1505 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1506 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1507 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1508 | socket_state previous; | |
b89741a0 AS |
1509 | int res; |
1510 | ||
0c3141e9 AS |
1511 | lock_sock(sk); |
1512 | ||
b89741a0 | 1513 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1514 | if (sock->state == SS_READY) { |
1515 | res = -EOPNOTSUPP; | |
1516 | goto exit; | |
1517 | } | |
b89741a0 | 1518 | |
b89741a0 AS |
1519 | /* |
1520 | * Reject connection attempt using multicast address | |
1521 | * | |
1522 | * Note: send_msg() validates the rest of the address fields, | |
1523 | * so there's no need to do it here | |
1524 | */ | |
0c3141e9 AS |
1525 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1526 | res = -EINVAL; | |
1527 | goto exit; | |
1528 | } | |
1529 | ||
78eb3a53 | 1530 | previous = sock->state; |
584d24b3 YX |
1531 | switch (sock->state) { |
1532 | case SS_UNCONNECTED: | |
1533 | /* Send a 'SYN-' to destination */ | |
1534 | m.msg_name = dest; | |
1535 | m.msg_namelen = destlen; | |
1536 | ||
1537 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1538 | * indicate send_msg() is never blocked. | |
1539 | */ | |
1540 | if (!timeout) | |
1541 | m.msg_flags = MSG_DONTWAIT; | |
1542 | ||
247f0f3c | 1543 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1544 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1545 | goto exit; | |
1546 | ||
1547 | /* Just entered SS_CONNECTING state; the only | |
1548 | * difference is that return value in non-blocking | |
1549 | * case is EINPROGRESS, rather than EALREADY. | |
1550 | */ | |
1551 | res = -EINPROGRESS; | |
584d24b3 | 1552 | case SS_CONNECTING: |
78eb3a53 YX |
1553 | if (previous == SS_CONNECTING) |
1554 | res = -EALREADY; | |
1555 | if (!timeout) | |
1556 | goto exit; | |
1557 | timeout = msecs_to_jiffies(timeout); | |
1558 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1559 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1560 | break; |
1561 | case SS_CONNECTED: | |
1562 | res = -EISCONN; | |
1563 | break; | |
1564 | default: | |
1565 | res = -EINVAL; | |
78eb3a53 | 1566 | break; |
b89741a0 | 1567 | } |
0c3141e9 AS |
1568 | exit: |
1569 | release_sock(sk); | |
b89741a0 | 1570 | return res; |
b97bf3fd PL |
1571 | } |
1572 | ||
c4307285 | 1573 | /** |
247f0f3c | 1574 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1575 | * @sock: socket structure |
1576 | * @len: (unused) | |
c4307285 | 1577 | * |
b97bf3fd PL |
1578 | * Returns 0 on success, errno otherwise |
1579 | */ | |
247f0f3c | 1580 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1581 | { |
0c3141e9 AS |
1582 | struct sock *sk = sock->sk; |
1583 | int res; | |
1584 | ||
1585 | lock_sock(sk); | |
b97bf3fd | 1586 | |
245f3d34 | 1587 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1588 | res = -EINVAL; |
1589 | else { | |
1590 | sock->state = SS_LISTENING; | |
1591 | res = 0; | |
1592 | } | |
1593 | ||
1594 | release_sock(sk); | |
1595 | return res; | |
b97bf3fd PL |
1596 | } |
1597 | ||
6398e23c YX |
1598 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1599 | { | |
1600 | struct sock *sk = sock->sk; | |
1601 | DEFINE_WAIT(wait); | |
1602 | int err; | |
1603 | ||
1604 | /* True wake-one mechanism for incoming connections: only | |
1605 | * one process gets woken up, not the 'whole herd'. | |
1606 | * Since we do not 'race & poll' for established sockets | |
1607 | * anymore, the common case will execute the loop only once. | |
1608 | */ | |
1609 | for (;;) { | |
1610 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1611 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1612 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1613 | release_sock(sk); |
1614 | timeo = schedule_timeout(timeo); | |
1615 | lock_sock(sk); | |
1616 | } | |
1617 | err = 0; | |
1618 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1619 | break; | |
1620 | err = -EINVAL; | |
1621 | if (sock->state != SS_LISTENING) | |
1622 | break; | |
1623 | err = sock_intr_errno(timeo); | |
1624 | if (signal_pending(current)) | |
1625 | break; | |
1626 | err = -EAGAIN; | |
1627 | if (!timeo) | |
1628 | break; | |
1629 | } | |
1630 | finish_wait(sk_sleep(sk), &wait); | |
1631 | return err; | |
1632 | } | |
1633 | ||
c4307285 | 1634 | /** |
247f0f3c | 1635 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1636 | * @sock: listening socket |
1637 | * @newsock: new socket that is to be connected | |
1638 | * @flags: file-related flags associated with socket | |
c4307285 | 1639 | * |
b97bf3fd PL |
1640 | * Returns 0 on success, errno otherwise |
1641 | */ | |
247f0f3c | 1642 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1643 | { |
0fef8f20 | 1644 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1645 | struct sk_buff *buf; |
8826cde6 | 1646 | struct tipc_port *new_port; |
0fef8f20 | 1647 | struct tipc_msg *msg; |
f9fef18c | 1648 | struct tipc_portid peer; |
0fef8f20 | 1649 | u32 new_ref; |
6398e23c | 1650 | long timeo; |
0c3141e9 | 1651 | int res; |
b97bf3fd | 1652 | |
0c3141e9 | 1653 | lock_sock(sk); |
b97bf3fd | 1654 | |
0c3141e9 AS |
1655 | if (sock->state != SS_LISTENING) { |
1656 | res = -EINVAL; | |
b97bf3fd PL |
1657 | goto exit; |
1658 | } | |
6398e23c YX |
1659 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1660 | res = tipc_wait_for_accept(sock, timeo); | |
1661 | if (res) | |
1662 | goto exit; | |
0c3141e9 AS |
1663 | |
1664 | buf = skb_peek(&sk->sk_receive_queue); | |
1665 | ||
c5fa7b3c | 1666 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1667 | if (res) |
1668 | goto exit; | |
b97bf3fd | 1669 | |
0fef8f20 | 1670 | new_sk = new_sock->sk; |
58ed9442 | 1671 | new_port = &tipc_sk(new_sk)->port; |
8826cde6 | 1672 | new_ref = new_port->ref; |
0fef8f20 | 1673 | msg = buf_msg(buf); |
b97bf3fd | 1674 | |
0fef8f20 PG |
1675 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1676 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1677 | ||
1678 | /* | |
1679 | * Reject any stray messages received by new socket | |
1680 | * before the socket lock was taken (very, very unlikely) | |
1681 | */ | |
1682 | reject_rx_queue(new_sk); | |
1683 | ||
1684 | /* Connect new socket to it's peer */ | |
f9fef18c JPM |
1685 | peer.ref = msg_origport(msg); |
1686 | peer.node = msg_orignode(msg); | |
1687 | tipc_port_connect(new_ref, &peer); | |
0fef8f20 PG |
1688 | new_sock->state = SS_CONNECTED; |
1689 | ||
3b4f302d | 1690 | tipc_port_set_importance(new_port, msg_importance(msg)); |
0fef8f20 | 1691 | if (msg_named(msg)) { |
8826cde6 JPM |
1692 | new_port->conn_type = msg_nametype(msg); |
1693 | new_port->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 1694 | } |
0fef8f20 PG |
1695 | |
1696 | /* | |
1697 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
1698 | * Respond to 'SYN+' by queuing it on new socket. | |
1699 | */ | |
1700 | if (!msg_data_sz(msg)) { | |
1701 | struct msghdr m = {NULL,}; | |
1702 | ||
1703 | advance_rx_queue(sk); | |
247f0f3c | 1704 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
1705 | } else { |
1706 | __skb_dequeue(&sk->sk_receive_queue); | |
1707 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 1708 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
1709 | } |
1710 | release_sock(new_sk); | |
b97bf3fd | 1711 | exit: |
0c3141e9 | 1712 | release_sock(sk); |
b97bf3fd PL |
1713 | return res; |
1714 | } | |
1715 | ||
1716 | /** | |
247f0f3c | 1717 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 1718 | * @sock: socket structure |
e247a8f5 | 1719 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
1720 | * |
1721 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 1722 | * |
b97bf3fd PL |
1723 | * Returns 0 on success, errno otherwise |
1724 | */ | |
247f0f3c | 1725 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 1726 | { |
0c3141e9 | 1727 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1728 | struct tipc_sock *tsk = tipc_sk(sk); |
1729 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1730 | struct sk_buff *buf; |
1731 | int res; | |
1732 | ||
e247a8f5 AS |
1733 | if (how != SHUT_RDWR) |
1734 | return -EINVAL; | |
b97bf3fd | 1735 | |
0c3141e9 | 1736 | lock_sock(sk); |
b97bf3fd PL |
1737 | |
1738 | switch (sock->state) { | |
0c3141e9 | 1739 | case SS_CONNECTING: |
b97bf3fd PL |
1740 | case SS_CONNECTED: |
1741 | ||
b97bf3fd | 1742 | restart: |
617d3c7a | 1743 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
0c3141e9 AS |
1744 | buf = __skb_dequeue(&sk->sk_receive_queue); |
1745 | if (buf) { | |
40682432 | 1746 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
5f6d9123 | 1747 | kfree_skb(buf); |
b97bf3fd PL |
1748 | goto restart; |
1749 | } | |
58ed9442 | 1750 | tipc_port_disconnect(port->ref); |
b97bf3fd | 1751 | tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 1752 | } else { |
58ed9442 | 1753 | tipc_port_shutdown(port->ref); |
b97bf3fd | 1754 | } |
0c3141e9 AS |
1755 | |
1756 | sock->state = SS_DISCONNECTING; | |
b97bf3fd PL |
1757 | |
1758 | /* fall through */ | |
1759 | ||
1760 | case SS_DISCONNECTING: | |
1761 | ||
75031151 | 1762 | /* Discard any unreceived messages */ |
57467e56 | 1763 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
1764 | |
1765 | /* Wake up anyone sleeping in poll */ | |
1766 | sk->sk_state_change(sk); | |
b97bf3fd PL |
1767 | res = 0; |
1768 | break; | |
1769 | ||
1770 | default: | |
1771 | res = -ENOTCONN; | |
1772 | } | |
1773 | ||
0c3141e9 | 1774 | release_sock(sk); |
b97bf3fd PL |
1775 | return res; |
1776 | } | |
1777 | ||
1778 | /** | |
247f0f3c | 1779 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
1780 | * @sock: socket structure |
1781 | * @lvl: option level | |
1782 | * @opt: option identifier | |
1783 | * @ov: pointer to new option value | |
1784 | * @ol: length of option value | |
c4307285 YH |
1785 | * |
1786 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 1787 | * (to ease compatibility). |
c4307285 | 1788 | * |
b97bf3fd PL |
1789 | * Returns 0 on success, errno otherwise |
1790 | */ | |
247f0f3c YX |
1791 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
1792 | char __user *ov, unsigned int ol) | |
b97bf3fd | 1793 | { |
0c3141e9 | 1794 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1795 | struct tipc_sock *tsk = tipc_sk(sk); |
1796 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1797 | u32 value; |
1798 | int res; | |
1799 | ||
c4307285 YH |
1800 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1801 | return 0; | |
b97bf3fd PL |
1802 | if (lvl != SOL_TIPC) |
1803 | return -ENOPROTOOPT; | |
1804 | if (ol < sizeof(value)) | |
1805 | return -EINVAL; | |
2db9983a AS |
1806 | res = get_user(value, (u32 __user *)ov); |
1807 | if (res) | |
b97bf3fd PL |
1808 | return res; |
1809 | ||
0c3141e9 | 1810 | lock_sock(sk); |
c4307285 | 1811 | |
b97bf3fd PL |
1812 | switch (opt) { |
1813 | case TIPC_IMPORTANCE: | |
58ed9442 | 1814 | tipc_port_set_importance(port, value); |
b97bf3fd PL |
1815 | break; |
1816 | case TIPC_SRC_DROPPABLE: | |
1817 | if (sock->type != SOCK_STREAM) | |
58ed9442 | 1818 | tipc_port_set_unreliable(port, value); |
c4307285 | 1819 | else |
b97bf3fd PL |
1820 | res = -ENOPROTOOPT; |
1821 | break; | |
1822 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 1823 | tipc_port_set_unreturnable(port, value); |
b97bf3fd PL |
1824 | break; |
1825 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1826 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 1827 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
1828 | break; |
1829 | default: | |
1830 | res = -EINVAL; | |
1831 | } | |
1832 | ||
0c3141e9 AS |
1833 | release_sock(sk); |
1834 | ||
b97bf3fd PL |
1835 | return res; |
1836 | } | |
1837 | ||
1838 | /** | |
247f0f3c | 1839 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
1840 | * @sock: socket structure |
1841 | * @lvl: option level | |
1842 | * @opt: option identifier | |
1843 | * @ov: receptacle for option value | |
1844 | * @ol: receptacle for length of option value | |
c4307285 YH |
1845 | * |
1846 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 1847 | * (to ease compatibility). |
c4307285 | 1848 | * |
b97bf3fd PL |
1849 | * Returns 0 on success, errno otherwise |
1850 | */ | |
247f0f3c YX |
1851 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
1852 | char __user *ov, int __user *ol) | |
b97bf3fd | 1853 | { |
0c3141e9 | 1854 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1855 | struct tipc_sock *tsk = tipc_sk(sk); |
1856 | struct tipc_port *port = &tsk->port; | |
c4307285 | 1857 | int len; |
b97bf3fd | 1858 | u32 value; |
c4307285 | 1859 | int res; |
b97bf3fd | 1860 | |
c4307285 YH |
1861 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1862 | return put_user(0, ol); | |
b97bf3fd PL |
1863 | if (lvl != SOL_TIPC) |
1864 | return -ENOPROTOOPT; | |
2db9983a AS |
1865 | res = get_user(len, ol); |
1866 | if (res) | |
c4307285 | 1867 | return res; |
b97bf3fd | 1868 | |
0c3141e9 | 1869 | lock_sock(sk); |
b97bf3fd PL |
1870 | |
1871 | switch (opt) { | |
1872 | case TIPC_IMPORTANCE: | |
58ed9442 | 1873 | value = tipc_port_importance(port); |
b97bf3fd PL |
1874 | break; |
1875 | case TIPC_SRC_DROPPABLE: | |
58ed9442 | 1876 | value = tipc_port_unreliable(port); |
b97bf3fd PL |
1877 | break; |
1878 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 1879 | value = tipc_port_unreturnable(port); |
b97bf3fd PL |
1880 | break; |
1881 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1882 | value = tipc_sk(sk)->conn_timeout; |
0c3141e9 | 1883 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 1884 | break; |
0e65967e | 1885 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 1886 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 1887 | break; |
0e65967e | 1888 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 1889 | value = skb_queue_len(&sk->sk_receive_queue); |
1890 | break; | |
b97bf3fd PL |
1891 | default: |
1892 | res = -EINVAL; | |
1893 | } | |
1894 | ||
0c3141e9 AS |
1895 | release_sock(sk); |
1896 | ||
25860c3b PG |
1897 | if (res) |
1898 | return res; /* "get" failed */ | |
b97bf3fd | 1899 | |
25860c3b PG |
1900 | if (len < sizeof(value)) |
1901 | return -EINVAL; | |
1902 | ||
1903 | if (copy_to_user(ov, &value, sizeof(value))) | |
1904 | return -EFAULT; | |
1905 | ||
1906 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
1907 | } |
1908 | ||
ae86b9e3 BH |
1909 | /* Protocol switches for the various types of TIPC sockets */ |
1910 | ||
bca65eae | 1911 | static const struct proto_ops msg_ops = { |
0e65967e | 1912 | .owner = THIS_MODULE, |
b97bf3fd | 1913 | .family = AF_TIPC, |
247f0f3c YX |
1914 | .release = tipc_release, |
1915 | .bind = tipc_bind, | |
1916 | .connect = tipc_connect, | |
5eee6a6d | 1917 | .socketpair = sock_no_socketpair, |
245f3d34 | 1918 | .accept = sock_no_accept, |
247f0f3c YX |
1919 | .getname = tipc_getname, |
1920 | .poll = tipc_poll, | |
5eee6a6d | 1921 | .ioctl = sock_no_ioctl, |
245f3d34 | 1922 | .listen = sock_no_listen, |
247f0f3c YX |
1923 | .shutdown = tipc_shutdown, |
1924 | .setsockopt = tipc_setsockopt, | |
1925 | .getsockopt = tipc_getsockopt, | |
1926 | .sendmsg = tipc_sendmsg, | |
1927 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1928 | .mmap = sock_no_mmap, |
1929 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1930 | }; |
1931 | ||
bca65eae | 1932 | static const struct proto_ops packet_ops = { |
0e65967e | 1933 | .owner = THIS_MODULE, |
b97bf3fd | 1934 | .family = AF_TIPC, |
247f0f3c YX |
1935 | .release = tipc_release, |
1936 | .bind = tipc_bind, | |
1937 | .connect = tipc_connect, | |
5eee6a6d | 1938 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1939 | .accept = tipc_accept, |
1940 | .getname = tipc_getname, | |
1941 | .poll = tipc_poll, | |
5eee6a6d | 1942 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1943 | .listen = tipc_listen, |
1944 | .shutdown = tipc_shutdown, | |
1945 | .setsockopt = tipc_setsockopt, | |
1946 | .getsockopt = tipc_getsockopt, | |
1947 | .sendmsg = tipc_send_packet, | |
1948 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1949 | .mmap = sock_no_mmap, |
1950 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1951 | }; |
1952 | ||
bca65eae | 1953 | static const struct proto_ops stream_ops = { |
0e65967e | 1954 | .owner = THIS_MODULE, |
b97bf3fd | 1955 | .family = AF_TIPC, |
247f0f3c YX |
1956 | .release = tipc_release, |
1957 | .bind = tipc_bind, | |
1958 | .connect = tipc_connect, | |
5eee6a6d | 1959 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1960 | .accept = tipc_accept, |
1961 | .getname = tipc_getname, | |
1962 | .poll = tipc_poll, | |
5eee6a6d | 1963 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1964 | .listen = tipc_listen, |
1965 | .shutdown = tipc_shutdown, | |
1966 | .setsockopt = tipc_setsockopt, | |
1967 | .getsockopt = tipc_getsockopt, | |
1968 | .sendmsg = tipc_send_stream, | |
1969 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
1970 | .mmap = sock_no_mmap, |
1971 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1972 | }; |
1973 | ||
bca65eae | 1974 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 1975 | .owner = THIS_MODULE, |
b97bf3fd | 1976 | .family = AF_TIPC, |
c5fa7b3c | 1977 | .create = tipc_sk_create |
b97bf3fd PL |
1978 | }; |
1979 | ||
1980 | static struct proto tipc_proto = { | |
1981 | .name = "TIPC", | |
1982 | .owner = THIS_MODULE, | |
cc79dd1b YX |
1983 | .obj_size = sizeof(struct tipc_sock), |
1984 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
1985 | }; |
1986 | ||
c5fa7b3c YX |
1987 | static struct proto tipc_proto_kern = { |
1988 | .name = "TIPC", | |
1989 | .obj_size = sizeof(struct tipc_sock), | |
1990 | .sysctl_rmem = sysctl_tipc_rmem | |
1991 | }; | |
1992 | ||
b97bf3fd | 1993 | /** |
4323add6 | 1994 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 1995 | * |
b97bf3fd PL |
1996 | * Returns 0 on success, errno otherwise |
1997 | */ | |
4323add6 | 1998 | int tipc_socket_init(void) |
b97bf3fd PL |
1999 | { |
2000 | int res; | |
2001 | ||
c4307285 | 2002 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2003 | if (res) { |
2cf8aa19 | 2004 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2005 | goto out; |
2006 | } | |
2007 | ||
2008 | res = sock_register(&tipc_family_ops); | |
2009 | if (res) { | |
2cf8aa19 | 2010 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2011 | proto_unregister(&tipc_proto); |
2012 | goto out; | |
2013 | } | |
b97bf3fd PL |
2014 | out: |
2015 | return res; | |
2016 | } | |
2017 | ||
2018 | /** | |
4323add6 | 2019 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2020 | */ |
4323add6 | 2021 | void tipc_socket_stop(void) |
b97bf3fd | 2022 | { |
b97bf3fd PL |
2023 | sock_unregister(tipc_family_ops.family); |
2024 | proto_unregister(&tipc_proto); | |
2025 | } |