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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 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" |
6c9808ce | 38 | #include "ref.h" |
d265fef6 | 39 | #include "port.h" |
e2dafe87 | 40 | #include "name_table.h" |
78acb1f9 | 41 | #include "node.h" |
e2dafe87 | 42 | #include "link.h" |
2cf8aa19 | 43 | #include <linux/export.h> |
5a9ee0be | 44 | #include "config.h" |
2cf8aa19 | 45 | |
b97bf3fd PL |
46 | #define SS_LISTENING -1 /* socket is listening */ |
47 | #define SS_READY -2 /* socket is connectionless */ | |
48 | ||
3654ea02 | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
dadebc00 | 50 | #define CONN_PROBING_INTERVAL 3600000 /* [ms] => 1 h */ |
ac0074ee | 51 | #define TIPC_FWD_MSG 1 |
b97bf3fd | 52 | |
4f4482dc | 53 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 54 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 55 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
56 | static int tipc_release(struct socket *sock); |
57 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 58 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
57289015 | 59 | static void tipc_sk_timeout(unsigned long ref); |
0fc87aae JPM |
60 | static int tipc_sk_publish(struct tipc_port *port, uint scope, |
61 | struct tipc_name_seq const *seq); | |
62 | static int tipc_sk_withdraw(struct tipc_port *port, uint scope, | |
63 | struct tipc_name_seq const *seq); | |
b97bf3fd | 64 | |
bca65eae FW |
65 | static const struct proto_ops packet_ops; |
66 | static const struct proto_ops stream_ops; | |
67 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
68 | |
69 | static struct proto tipc_proto; | |
c5fa7b3c | 70 | static struct proto tipc_proto_kern; |
b97bf3fd | 71 | |
c4307285 | 72 | /* |
0c3141e9 AS |
73 | * Revised TIPC socket locking policy: |
74 | * | |
75 | * Most socket operations take the standard socket lock when they start | |
76 | * and hold it until they finish (or until they need to sleep). Acquiring | |
77 | * this lock grants the owner exclusive access to the fields of the socket | |
78 | * data structures, with the exception of the backlog queue. A few socket | |
79 | * operations can be done without taking the socket lock because they only | |
80 | * read socket information that never changes during the life of the socket. | |
81 | * | |
82 | * Socket operations may acquire the lock for the associated TIPC port if they | |
83 | * need to perform an operation on the port. If any routine needs to acquire | |
84 | * both the socket lock and the port lock it must take the socket lock first | |
85 | * to avoid the risk of deadlock. | |
86 | * | |
87 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
88 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
89 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
90 | * and either handles the message itself or adds it to the socket's backlog | |
91 | * queue; in the latter case the queued message is processed once the process | |
92 | * owning the socket lock releases it. | |
93 | * | |
94 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
95 | * the problem of a blocked socket operation preventing any other operations | |
96 | * from occurring. However, applications must be careful if they have | |
97 | * multiple threads trying to send (or receive) on the same socket, as these | |
98 | * operations might interfere with each other. For example, doing a connect | |
99 | * and a receive at the same time might allow the receive to consume the | |
100 | * ACK message meant for the connect. While additional work could be done | |
101 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
102 | * | |
103 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
104 | * that another operation that must be performed in a non-blocking manner is | |
105 | * not delayed for very long because the lock has already been taken. | |
106 | * | |
107 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
108 | * constant over its lifetime; such fields can be examined without taking | |
109 | * the socket lock and/or port lock, and do not need to be re-read even | |
110 | * after resuming processing after waiting. These fields include: | |
111 | * - socket type | |
112 | * - pointer to socket sk structure (aka tipc_sock structure) | |
113 | * - pointer to port structure | |
114 | * - port reference | |
115 | */ | |
116 | ||
8826cde6 JPM |
117 | #include "socket.h" |
118 | ||
0c3141e9 AS |
119 | /** |
120 | * advance_rx_queue - discard first buffer in socket receive queue | |
121 | * | |
122 | * Caller must hold socket lock | |
b97bf3fd | 123 | */ |
0c3141e9 | 124 | static void advance_rx_queue(struct sock *sk) |
b97bf3fd | 125 | { |
5f6d9123 | 126 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
127 | } |
128 | ||
b97bf3fd | 129 | /** |
0c3141e9 AS |
130 | * reject_rx_queue - reject all buffers in socket receive queue |
131 | * | |
132 | * Caller must hold socket lock | |
b97bf3fd | 133 | */ |
0c3141e9 | 134 | static void reject_rx_queue(struct sock *sk) |
b97bf3fd | 135 | { |
0c3141e9 | 136 | struct sk_buff *buf; |
8db1bae3 | 137 | u32 dnode; |
0c3141e9 | 138 | |
8db1bae3 JPM |
139 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) { |
140 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) | |
9fbfb8b1 | 141 | tipc_link_xmit(buf, dnode, 0); |
8db1bae3 | 142 | } |
b97bf3fd PL |
143 | } |
144 | ||
0fc87aae JPM |
145 | /* tipc_sk_peer_msg - verify if message was sent by connected port's peer |
146 | * | |
147 | * Handles cases where the node's network address has changed from | |
148 | * the default of <0.0.0> to its configured setting. | |
149 | */ | |
150 | static bool tipc_sk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) | |
151 | { | |
152 | u32 peer_port = tipc_port_peerport(&tsk->port); | |
153 | u32 orig_node; | |
154 | u32 peer_node; | |
155 | ||
156 | if (unlikely(!tsk->port.connected)) | |
157 | return false; | |
158 | ||
159 | if (unlikely(msg_origport(msg) != peer_port)) | |
160 | return false; | |
161 | ||
162 | orig_node = msg_orignode(msg); | |
163 | peer_node = tipc_port_peernode(&tsk->port); | |
164 | ||
165 | if (likely(orig_node == peer_node)) | |
166 | return true; | |
167 | ||
168 | if (!orig_node && (peer_node == tipc_own_addr)) | |
169 | return true; | |
170 | ||
171 | if (!peer_node && (orig_node == tipc_own_addr)) | |
172 | return true; | |
173 | ||
174 | return false; | |
175 | } | |
176 | ||
b97bf3fd | 177 | /** |
c5fa7b3c | 178 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 179 | * @net: network namespace (must be default network) |
b97bf3fd PL |
180 | * @sock: pre-allocated socket structure |
181 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 182 | * @kern: caused by kernel or by userspace? |
c4307285 | 183 | * |
0c3141e9 AS |
184 | * This routine creates additional data structures used by the TIPC socket, |
185 | * initializes them, and links them together. | |
b97bf3fd PL |
186 | * |
187 | * Returns 0 on success, errno otherwise | |
188 | */ | |
58ed9442 JPM |
189 | static int tipc_sk_create(struct net *net, struct socket *sock, |
190 | int protocol, int kern) | |
b97bf3fd | 191 | { |
0c3141e9 AS |
192 | const struct proto_ops *ops; |
193 | socket_state state; | |
b97bf3fd | 194 | struct sock *sk; |
58ed9442 JPM |
195 | struct tipc_sock *tsk; |
196 | struct tipc_port *port; | |
5b8fa7ce | 197 | struct tipc_msg *msg; |
58ed9442 | 198 | u32 ref; |
0c3141e9 AS |
199 | |
200 | /* Validate arguments */ | |
b97bf3fd PL |
201 | if (unlikely(protocol != 0)) |
202 | return -EPROTONOSUPPORT; | |
203 | ||
b97bf3fd PL |
204 | switch (sock->type) { |
205 | case SOCK_STREAM: | |
0c3141e9 AS |
206 | ops = &stream_ops; |
207 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
208 | break; |
209 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
210 | ops = &packet_ops; |
211 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
212 | break; |
213 | case SOCK_DGRAM: | |
b97bf3fd | 214 | case SOCK_RDM: |
0c3141e9 AS |
215 | ops = &msg_ops; |
216 | state = SS_READY; | |
b97bf3fd | 217 | break; |
49978651 | 218 | default: |
49978651 | 219 | return -EPROTOTYPE; |
b97bf3fd PL |
220 | } |
221 | ||
0c3141e9 | 222 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
223 | if (!kern) |
224 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
225 | else | |
226 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
227 | ||
0c3141e9 | 228 | if (sk == NULL) |
b97bf3fd | 229 | return -ENOMEM; |
b97bf3fd | 230 | |
58ed9442 JPM |
231 | tsk = tipc_sk(sk); |
232 | port = &tsk->port; | |
6c9808ce | 233 | ref = tipc_ref_acquire(tsk); |
58ed9442 | 234 | if (!ref) { |
5b8fa7ce | 235 | pr_warn("Socket create failed; reference table exhausted\n"); |
0c3141e9 AS |
236 | return -ENOMEM; |
237 | } | |
5b8fa7ce JPM |
238 | port->max_pkt = MAX_PKT_DEFAULT; |
239 | port->ref = ref; | |
240 | INIT_LIST_HEAD(&port->publications); | |
5b8fa7ce | 241 | |
5b8fa7ce JPM |
242 | msg = &port->phdr; |
243 | tipc_msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
244 | NAMED_H_SIZE, 0); | |
245 | msg_set_origport(msg, ref); | |
b97bf3fd | 246 | |
0c3141e9 | 247 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
248 | sock->ops = ops; |
249 | sock->state = state; | |
0c3141e9 | 250 | sock_init_data(sock, sk); |
57289015 | 251 | k_init_timer(&port->timer, (Handler)tipc_sk_timeout, ref); |
4f4482dc | 252 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 253 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
254 | sk->sk_data_ready = tipc_data_ready; |
255 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 256 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 257 | tsk->sent_unacked = 0; |
4f4482dc | 258 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 259 | |
0c3141e9 | 260 | if (sock->state == SS_READY) { |
58ed9442 | 261 | tipc_port_set_unreturnable(port, true); |
0c3141e9 | 262 | if (sock->type == SOCK_DGRAM) |
58ed9442 | 263 | tipc_port_set_unreliable(port, true); |
0c3141e9 | 264 | } |
b97bf3fd PL |
265 | return 0; |
266 | } | |
267 | ||
c5fa7b3c YX |
268 | /** |
269 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
270 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
271 | * | |
272 | * We cannot use sock_creat_kern here because it bumps module user count. | |
273 | * Since socket owner and creator is the same module we must make sure | |
274 | * that module count remains zero for module local sockets, otherwise | |
275 | * we cannot do rmmod. | |
276 | * | |
277 | * Returns 0 on success, errno otherwise | |
278 | */ | |
279 | int tipc_sock_create_local(int type, struct socket **res) | |
280 | { | |
281 | int rc; | |
c5fa7b3c YX |
282 | |
283 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
284 | if (rc < 0) { | |
285 | pr_err("Failed to create kernel socket\n"); | |
286 | return rc; | |
287 | } | |
288 | tipc_sk_create(&init_net, *res, 0, 1); | |
289 | ||
c5fa7b3c YX |
290 | return 0; |
291 | } | |
292 | ||
293 | /** | |
294 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
295 | * @sock: the socket to be released. | |
296 | * | |
297 | * Module reference count is not incremented when such sockets are created, | |
298 | * so we must keep it from being decremented when they are released. | |
299 | */ | |
300 | void tipc_sock_release_local(struct socket *sock) | |
301 | { | |
247f0f3c | 302 | tipc_release(sock); |
c5fa7b3c YX |
303 | sock->ops = NULL; |
304 | sock_release(sock); | |
305 | } | |
306 | ||
307 | /** | |
308 | * tipc_sock_accept_local - accept a connection on a socket created | |
309 | * with tipc_sock_create_local. Use this function to avoid that | |
310 | * module reference count is inadvertently incremented. | |
311 | * | |
312 | * @sock: the accepting socket | |
313 | * @newsock: reference to the new socket to be created | |
314 | * @flags: socket flags | |
315 | */ | |
316 | ||
317 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 318 | int flags) |
c5fa7b3c YX |
319 | { |
320 | struct sock *sk = sock->sk; | |
321 | int ret; | |
322 | ||
323 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
324 | sk->sk_protocol, newsock); | |
325 | if (ret < 0) | |
326 | return ret; | |
327 | ||
247f0f3c | 328 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
329 | if (ret < 0) { |
330 | sock_release(*newsock); | |
331 | return ret; | |
332 | } | |
333 | (*newsock)->ops = sock->ops; | |
334 | return ret; | |
335 | } | |
336 | ||
b97bf3fd | 337 | /** |
247f0f3c | 338 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
339 | * @sock: socket to destroy |
340 | * | |
341 | * This routine cleans up any messages that are still queued on the socket. | |
342 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
343 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
344 | * and any others are discarded. (If the first message on a STREAM socket | |
345 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 346 | * |
b97bf3fd PL |
347 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
348 | * are returned or discarded according to the "destination droppable" setting | |
349 | * specified for the message by the sender. | |
350 | * | |
351 | * Returns 0 on success, errno otherwise | |
352 | */ | |
247f0f3c | 353 | static int tipc_release(struct socket *sock) |
b97bf3fd | 354 | { |
b97bf3fd | 355 | struct sock *sk = sock->sk; |
58ed9442 JPM |
356 | struct tipc_sock *tsk; |
357 | struct tipc_port *port; | |
b97bf3fd | 358 | struct sk_buff *buf; |
8db1bae3 | 359 | u32 dnode; |
b97bf3fd | 360 | |
0c3141e9 AS |
361 | /* |
362 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
363 | * releases a pre-allocated child socket that was never used) | |
364 | */ | |
0c3141e9 | 365 | if (sk == NULL) |
b97bf3fd | 366 | return 0; |
c4307285 | 367 | |
58ed9442 JPM |
368 | tsk = tipc_sk(sk); |
369 | port = &tsk->port; | |
0c3141e9 AS |
370 | lock_sock(sk); |
371 | ||
372 | /* | |
373 | * Reject all unreceived messages, except on an active connection | |
374 | * (which disconnects locally & sends a 'FIN+' to peer) | |
375 | */ | |
5b8fa7ce | 376 | dnode = tipc_port_peernode(port); |
b97bf3fd | 377 | while (sock->state != SS_DISCONNECTING) { |
0c3141e9 AS |
378 | buf = __skb_dequeue(&sk->sk_receive_queue); |
379 | if (buf == NULL) | |
b97bf3fd | 380 | break; |
40682432 | 381 | if (TIPC_SKB_CB(buf)->handle != NULL) |
5f6d9123 | 382 | kfree_skb(buf); |
0c3141e9 AS |
383 | else { |
384 | if ((sock->state == SS_CONNECTING) || | |
385 | (sock->state == SS_CONNECTED)) { | |
386 | sock->state = SS_DISCONNECTING; | |
dadebc00 | 387 | port->connected = 0; |
5b8fa7ce | 388 | tipc_node_remove_conn(dnode, port->ref); |
0c3141e9 | 389 | } |
8db1bae3 | 390 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
9fbfb8b1 | 391 | tipc_link_xmit(buf, dnode, 0); |
0c3141e9 | 392 | } |
b97bf3fd PL |
393 | } |
394 | ||
0fc87aae | 395 | tipc_sk_withdraw(port, 0, NULL); |
5b8fa7ce | 396 | tipc_ref_discard(port->ref); |
5b8fa7ce JPM |
397 | k_cancel_timer(&port->timer); |
398 | if (port->connected) { | |
399 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, | |
400 | SHORT_H_SIZE, 0, dnode, tipc_own_addr, | |
401 | tipc_port_peerport(port), | |
402 | port->ref, TIPC_ERR_NO_PORT); | |
403 | if (buf) | |
404 | tipc_link_xmit(buf, dnode, port->ref); | |
405 | tipc_node_remove_conn(dnode, port->ref); | |
406 | } | |
5b8fa7ce | 407 | k_term_timer(&port->timer); |
b97bf3fd | 408 | |
0c3141e9 | 409 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 410 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 411 | |
0c3141e9 | 412 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
413 | sock->state = SS_DISCONNECTING; |
414 | release_sock(sk); | |
b97bf3fd | 415 | sock_put(sk); |
0c3141e9 | 416 | sock->sk = NULL; |
b97bf3fd | 417 | |
065d7e39 | 418 | return 0; |
b97bf3fd PL |
419 | } |
420 | ||
421 | /** | |
247f0f3c | 422 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
423 | * @sock: socket structure |
424 | * @uaddr: socket address describing name(s) and desired operation | |
425 | * @uaddr_len: size of socket address data structure | |
c4307285 | 426 | * |
b97bf3fd PL |
427 | * Name and name sequence binding is indicated using a positive scope value; |
428 | * a negative scope value unbinds the specified name. Specifying no name | |
429 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 430 | * |
b97bf3fd | 431 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
432 | * |
433 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
434 | * access any non-constant socket information. | |
b97bf3fd | 435 | */ |
247f0f3c YX |
436 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
437 | int uaddr_len) | |
b97bf3fd | 438 | { |
84602761 | 439 | struct sock *sk = sock->sk; |
b97bf3fd | 440 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 441 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 442 | int res = -EINVAL; |
b97bf3fd | 443 | |
84602761 YX |
444 | lock_sock(sk); |
445 | if (unlikely(!uaddr_len)) { | |
0fc87aae | 446 | res = tipc_sk_withdraw(&tsk->port, 0, NULL); |
84602761 YX |
447 | goto exit; |
448 | } | |
c4307285 | 449 | |
84602761 YX |
450 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
451 | res = -EINVAL; | |
452 | goto exit; | |
453 | } | |
454 | if (addr->family != AF_TIPC) { | |
455 | res = -EAFNOSUPPORT; | |
456 | goto exit; | |
457 | } | |
b97bf3fd | 458 | |
b97bf3fd PL |
459 | if (addr->addrtype == TIPC_ADDR_NAME) |
460 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
461 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
462 | res = -EAFNOSUPPORT; | |
463 | goto exit; | |
464 | } | |
c4307285 | 465 | |
13a2e898 | 466 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 467 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
468 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
469 | res = -EACCES; | |
470 | goto exit; | |
471 | } | |
c422f1bd | 472 | |
84602761 | 473 | res = (addr->scope > 0) ? |
0fc87aae JPM |
474 | tipc_sk_publish(&tsk->port, addr->scope, &addr->addr.nameseq) : |
475 | tipc_sk_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
476 | exit: |
477 | release_sock(sk); | |
478 | return res; | |
b97bf3fd PL |
479 | } |
480 | ||
c4307285 | 481 | /** |
247f0f3c | 482 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
483 | * @sock: socket structure |
484 | * @uaddr: area for returned socket address | |
485 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 486 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 487 | * |
b97bf3fd | 488 | * Returns 0 on success, errno otherwise |
0c3141e9 | 489 | * |
2da59918 AS |
490 | * NOTE: This routine doesn't need to take the socket lock since it only |
491 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 492 | * a completely predictable manner). |
b97bf3fd | 493 | */ |
247f0f3c YX |
494 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
495 | int *uaddr_len, int peer) | |
b97bf3fd | 496 | { |
b97bf3fd | 497 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 498 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
b97bf3fd | 499 | |
88f8a5e3 | 500 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 501 | if (peer) { |
2da59918 AS |
502 | if ((sock->state != SS_CONNECTED) && |
503 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
504 | return -ENOTCONN; | |
58ed9442 JPM |
505 | addr->addr.id.ref = tipc_port_peerport(&tsk->port); |
506 | addr->addr.id.node = tipc_port_peernode(&tsk->port); | |
0c3141e9 | 507 | } else { |
58ed9442 | 508 | addr->addr.id.ref = tsk->port.ref; |
b924dcf0 | 509 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 510 | } |
b97bf3fd PL |
511 | |
512 | *uaddr_len = sizeof(*addr); | |
513 | addr->addrtype = TIPC_ADDR_ID; | |
514 | addr->family = AF_TIPC; | |
515 | addr->scope = 0; | |
b97bf3fd PL |
516 | addr->addr.name.domain = 0; |
517 | ||
0c3141e9 | 518 | return 0; |
b97bf3fd PL |
519 | } |
520 | ||
521 | /** | |
247f0f3c | 522 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
523 | * @file: file structure associated with the socket |
524 | * @sock: socket for which to calculate the poll bits | |
525 | * @wait: ??? | |
526 | * | |
9b674e82 AS |
527 | * Returns pollmask value |
528 | * | |
529 | * COMMENTARY: | |
530 | * It appears that the usual socket locking mechanisms are not useful here | |
531 | * since the pollmask info is potentially out-of-date the moment this routine | |
532 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
533 | * to handle any preventable race conditions, so TIPC will do the same ... | |
534 | * | |
535 | * TIPC sets the returned events as follows: | |
f662c070 AS |
536 | * |
537 | * socket state flags set | |
538 | * ------------ --------- | |
539 | * unconnected no read flags | |
c4fc298a | 540 | * POLLOUT if port is not congested |
f662c070 AS |
541 | * |
542 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
543 | * no write flags | |
544 | * | |
545 | * connected POLLIN/POLLRDNORM if data in rx queue | |
546 | * POLLOUT if port is not congested | |
547 | * | |
548 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
549 | * no write flags | |
550 | * | |
551 | * listening POLLIN if SYN in rx queue | |
552 | * no write flags | |
553 | * | |
554 | * ready POLLIN/POLLRDNORM if data in rx queue | |
555 | * [connectionless] POLLOUT (since port cannot be congested) | |
556 | * | |
557 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
558 | * imply that the operation will succeed, merely that it should be performed | |
559 | * and will not block. | |
b97bf3fd | 560 | */ |
247f0f3c YX |
561 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
562 | poll_table *wait) | |
b97bf3fd | 563 | { |
9b674e82 | 564 | struct sock *sk = sock->sk; |
58ed9442 | 565 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 566 | u32 mask = 0; |
9b674e82 | 567 | |
f288bef4 | 568 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 569 | |
f662c070 | 570 | switch ((int)sock->state) { |
c4fc298a | 571 | case SS_UNCONNECTED: |
60120526 | 572 | if (!tsk->link_cong) |
c4fc298a EH |
573 | mask |= POLLOUT; |
574 | break; | |
f662c070 AS |
575 | case SS_READY: |
576 | case SS_CONNECTED: | |
60120526 | 577 | if (!tsk->link_cong && !tipc_sk_conn_cong(tsk)) |
f662c070 AS |
578 | mask |= POLLOUT; |
579 | /* fall thru' */ | |
580 | case SS_CONNECTING: | |
581 | case SS_LISTENING: | |
582 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
583 | mask |= (POLLIN | POLLRDNORM); | |
584 | break; | |
585 | case SS_DISCONNECTING: | |
586 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
587 | break; | |
588 | } | |
9b674e82 AS |
589 | |
590 | return mask; | |
b97bf3fd PL |
591 | } |
592 | ||
0abd8ff2 JPM |
593 | /** |
594 | * tipc_sendmcast - send multicast message | |
595 | * @sock: socket structure | |
596 | * @seq: destination address | |
597 | * @iov: message data to send | |
598 | * @dsz: total length of message data | |
599 | * @timeo: timeout to wait for wakeup | |
600 | * | |
601 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
602 | * Returns the number of bytes sent on success, or errno | |
603 | */ | |
604 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
605 | struct iovec *iov, size_t dsz, long timeo) | |
606 | { | |
607 | struct sock *sk = sock->sk; | |
608 | struct tipc_msg *mhdr = &tipc_sk(sk)->port.phdr; | |
609 | struct sk_buff *buf; | |
610 | uint mtu; | |
611 | int rc; | |
612 | ||
613 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
614 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
615 | msg_set_destport(mhdr, 0); | |
616 | msg_set_destnode(mhdr, 0); | |
617 | msg_set_nametype(mhdr, seq->type); | |
618 | msg_set_namelower(mhdr, seq->lower); | |
619 | msg_set_nameupper(mhdr, seq->upper); | |
620 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
621 | ||
622 | new_mtu: | |
623 | mtu = tipc_bclink_get_mtu(); | |
9fbfb8b1 | 624 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
0abd8ff2 JPM |
625 | if (unlikely(rc < 0)) |
626 | return rc; | |
627 | ||
628 | do { | |
629 | rc = tipc_bclink_xmit(buf); | |
630 | if (likely(rc >= 0)) { | |
631 | rc = dsz; | |
632 | break; | |
633 | } | |
634 | if (rc == -EMSGSIZE) | |
635 | goto new_mtu; | |
636 | if (rc != -ELINKCONG) | |
637 | break; | |
50100a5e | 638 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
639 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
640 | if (rc) | |
641 | kfree_skb_list(buf); | |
642 | } while (!rc); | |
643 | return rc; | |
644 | } | |
645 | ||
078bec82 JPM |
646 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
647 | */ | |
648 | void tipc_sk_mcast_rcv(struct sk_buff *buf) | |
649 | { | |
650 | struct tipc_msg *msg = buf_msg(buf); | |
651 | struct tipc_port_list dports = {0, NULL, }; | |
652 | struct tipc_port_list *item; | |
653 | struct sk_buff *b; | |
654 | uint i, last, dst = 0; | |
655 | u32 scope = TIPC_CLUSTER_SCOPE; | |
656 | ||
657 | if (in_own_node(msg_orignode(msg))) | |
658 | scope = TIPC_NODE_SCOPE; | |
659 | ||
660 | /* Create destination port list: */ | |
661 | tipc_nametbl_mc_translate(msg_nametype(msg), | |
662 | msg_namelower(msg), | |
663 | msg_nameupper(msg), | |
664 | scope, | |
665 | &dports); | |
666 | last = dports.count; | |
667 | if (!last) { | |
668 | kfree_skb(buf); | |
669 | return; | |
670 | } | |
671 | ||
672 | for (item = &dports; item; item = item->next) { | |
673 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { | |
674 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; | |
675 | if (!b) { | |
676 | pr_warn("Failed do clone mcast rcv buffer\n"); | |
677 | continue; | |
678 | } | |
679 | msg_set_destport(msg, item->ports[i]); | |
680 | tipc_sk_rcv(b); | |
681 | } | |
682 | } | |
683 | tipc_port_list_free(&dports); | |
684 | } | |
685 | ||
ac0074ee JPM |
686 | /** |
687 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
688 | * @tsk: receiving socket | |
689 | * @dnode: node to send response message to, if any | |
690 | * @buf: buffer containing protocol message | |
691 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if | |
692 | * (CONN_PROBE_REPLY) message should be forwarded. | |
693 | */ | |
52f50ce5 WY |
694 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
695 | struct sk_buff *buf) | |
ac0074ee JPM |
696 | { |
697 | struct tipc_msg *msg = buf_msg(buf); | |
698 | struct tipc_port *port = &tsk->port; | |
60120526 | 699 | int conn_cong; |
ac0074ee JPM |
700 | |
701 | /* Ignore if connection cannot be validated: */ | |
0fc87aae | 702 | if (!tipc_sk_peer_msg(tsk, msg)) |
ac0074ee JPM |
703 | goto exit; |
704 | ||
705 | port->probing_state = TIPC_CONN_OK; | |
706 | ||
707 | if (msg_type(msg) == CONN_ACK) { | |
60120526 JPM |
708 | conn_cong = tipc_sk_conn_cong(tsk); |
709 | tsk->sent_unacked -= msg_msgcnt(msg); | |
710 | if (conn_cong) | |
50100a5e | 711 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee JPM |
712 | } else if (msg_type(msg) == CONN_PROBE) { |
713 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) | |
714 | return TIPC_OK; | |
715 | msg_set_type(msg, CONN_PROBE_REPLY); | |
716 | return TIPC_FWD_MSG; | |
717 | } | |
718 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
719 | exit: | |
720 | kfree_skb(buf); | |
721 | return TIPC_OK; | |
722 | } | |
723 | ||
c4307285 | 724 | /** |
b97bf3fd PL |
725 | * dest_name_check - verify user is permitted to send to specified port name |
726 | * @dest: destination address | |
727 | * @m: descriptor for message to be sent | |
c4307285 | 728 | * |
b97bf3fd PL |
729 | * Prevents restricted configuration commands from being issued by |
730 | * unauthorized users. | |
c4307285 | 731 | * |
b97bf3fd PL |
732 | * Returns 0 if permission is granted, otherwise errno |
733 | */ | |
05790c64 | 734 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
b97bf3fd PL |
735 | { |
736 | struct tipc_cfg_msg_hdr hdr; | |
737 | ||
e2dafe87 JPM |
738 | if (unlikely(dest->addrtype == TIPC_ADDR_ID)) |
739 | return 0; | |
c4307285 YH |
740 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
741 | return 0; | |
742 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) | |
743 | return 0; | |
c4307285 YH |
744 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
745 | return -EACCES; | |
b97bf3fd | 746 | |
3f8dd944 AS |
747 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
748 | return -EMSGSIZE; | |
c4307285 | 749 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
b97bf3fd | 750 | return -EFAULT; |
70cb2347 | 751 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
b97bf3fd | 752 | return -EACCES; |
c4307285 | 753 | |
b97bf3fd PL |
754 | return 0; |
755 | } | |
756 | ||
3f40504f YX |
757 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
758 | { | |
759 | struct sock *sk = sock->sk; | |
58ed9442 | 760 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
761 | DEFINE_WAIT(wait); |
762 | int done; | |
763 | ||
764 | do { | |
765 | int err = sock_error(sk); | |
766 | if (err) | |
767 | return err; | |
768 | if (sock->state == SS_DISCONNECTING) | |
769 | return -EPIPE; | |
770 | if (!*timeo_p) | |
771 | return -EAGAIN; | |
772 | if (signal_pending(current)) | |
773 | return sock_intr_errno(*timeo_p); | |
774 | ||
775 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 776 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
777 | finish_wait(sk_sleep(sk), &wait); |
778 | } while (!done); | |
779 | return 0; | |
780 | } | |
781 | ||
b97bf3fd | 782 | /** |
247f0f3c | 783 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 784 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
785 | * @sock: socket structure |
786 | * @m: message to send | |
e2dafe87 | 787 | * @dsz: amount of user data to be sent |
c4307285 | 788 | * |
b97bf3fd | 789 | * Message must have an destination specified explicitly. |
c4307285 | 790 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
791 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
792 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 793 | * |
b97bf3fd PL |
794 | * Returns the number of bytes sent on success, or errno otherwise |
795 | */ | |
247f0f3c | 796 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
e2dafe87 | 797 | struct msghdr *m, size_t dsz) |
b97bf3fd | 798 | { |
e2dafe87 | 799 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 800 | struct sock *sk = sock->sk; |
58ed9442 | 801 | struct tipc_sock *tsk = tipc_sk(sk); |
5c311421 | 802 | struct tipc_port *port = &tsk->port; |
e2dafe87 JPM |
803 | struct tipc_msg *mhdr = &port->phdr; |
804 | struct iovec *iov = m->msg_iov; | |
805 | u32 dnode, dport; | |
806 | struct sk_buff *buf; | |
807 | struct tipc_name_seq *seq = &dest->addr.nameseq; | |
808 | u32 mtu; | |
3f40504f | 809 | long timeo; |
e2dafe87 | 810 | int rc = -EINVAL; |
b97bf3fd PL |
811 | |
812 | if (unlikely(!dest)) | |
813 | return -EDESTADDRREQ; | |
e2dafe87 | 814 | |
51f9cc1f AS |
815 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
816 | (dest->family != AF_TIPC))) | |
b97bf3fd | 817 | return -EINVAL; |
e2dafe87 JPM |
818 | |
819 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 820 | return -EMSGSIZE; |
b97bf3fd | 821 | |
0c3141e9 AS |
822 | if (iocb) |
823 | lock_sock(sk); | |
824 | ||
e2dafe87 | 825 | if (unlikely(sock->state != SS_READY)) { |
0c3141e9 | 826 | if (sock->state == SS_LISTENING) { |
e2dafe87 | 827 | rc = -EPIPE; |
0c3141e9 AS |
828 | goto exit; |
829 | } | |
830 | if (sock->state != SS_UNCONNECTED) { | |
e2dafe87 | 831 | rc = -EISCONN; |
0c3141e9 AS |
832 | goto exit; |
833 | } | |
58ed9442 | 834 | if (tsk->port.published) { |
e2dafe87 | 835 | rc = -EOPNOTSUPP; |
0c3141e9 AS |
836 | goto exit; |
837 | } | |
3388007b | 838 | if (dest->addrtype == TIPC_ADDR_NAME) { |
58ed9442 JPM |
839 | tsk->port.conn_type = dest->addr.name.name.type; |
840 | tsk->port.conn_instance = dest->addr.name.name.instance; | |
3388007b | 841 | } |
b97bf3fd | 842 | } |
e2dafe87 JPM |
843 | rc = dest_name_check(dest, m); |
844 | if (rc) | |
845 | goto exit; | |
b97bf3fd | 846 | |
3f40504f | 847 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
848 | |
849 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
850 | rc = tipc_sendmcast(sock, seq, iov, dsz, timeo); | |
851 | goto exit; | |
852 | } else if (dest->addrtype == TIPC_ADDR_NAME) { | |
853 | u32 type = dest->addr.name.name.type; | |
854 | u32 inst = dest->addr.name.name.instance; | |
855 | u32 domain = dest->addr.name.domain; | |
856 | ||
857 | dnode = domain; | |
858 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
859 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
860 | msg_set_nametype(mhdr, type); | |
861 | msg_set_nameinst(mhdr, inst); | |
862 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
863 | dport = tipc_nametbl_translate(type, inst, &dnode); | |
864 | msg_set_destnode(mhdr, dnode); | |
865 | msg_set_destport(mhdr, dport); | |
866 | if (unlikely(!dport && !dnode)) { | |
867 | rc = -EHOSTUNREACH; | |
868 | goto exit; | |
c4307285 | 869 | } |
e2dafe87 JPM |
870 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
871 | dnode = dest->addr.id.node; | |
872 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
873 | msg_set_lookup_scope(mhdr, 0); | |
874 | msg_set_destnode(mhdr, dnode); | |
875 | msg_set_destport(mhdr, dest->addr.id.ref); | |
876 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
877 | } | |
878 | ||
879 | new_mtu: | |
880 | mtu = tipc_node_get_mtu(dnode, tsk->port.ref); | |
9fbfb8b1 | 881 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
e2dafe87 JPM |
882 | if (rc < 0) |
883 | goto exit; | |
884 | ||
885 | do { | |
50100a5e | 886 | TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong; |
9fbfb8b1 | 887 | rc = tipc_link_xmit(buf, dnode, tsk->port.ref); |
e2dafe87 JPM |
888 | if (likely(rc >= 0)) { |
889 | if (sock->state != SS_READY) | |
0c3141e9 | 890 | sock->state = SS_CONNECTING; |
e2dafe87 | 891 | rc = dsz; |
0c3141e9 | 892 | break; |
c4307285 | 893 | } |
e2dafe87 JPM |
894 | if (rc == -EMSGSIZE) |
895 | goto new_mtu; | |
e2dafe87 | 896 | if (rc != -ELINKCONG) |
0c3141e9 | 897 | break; |
50100a5e | 898 | tsk->link_cong = 1; |
e2dafe87 | 899 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb EH |
900 | if (rc) |
901 | kfree_skb_list(buf); | |
e2dafe87 | 902 | } while (!rc); |
0c3141e9 AS |
903 | exit: |
904 | if (iocb) | |
905 | release_sock(sk); | |
e2dafe87 JPM |
906 | |
907 | return rc; | |
b97bf3fd PL |
908 | } |
909 | ||
391a6dd1 YX |
910 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
911 | { | |
912 | struct sock *sk = sock->sk; | |
58ed9442 | 913 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
914 | DEFINE_WAIT(wait); |
915 | int done; | |
916 | ||
917 | do { | |
918 | int err = sock_error(sk); | |
919 | if (err) | |
920 | return err; | |
921 | if (sock->state == SS_DISCONNECTING) | |
922 | return -EPIPE; | |
923 | else if (sock->state != SS_CONNECTED) | |
924 | return -ENOTCONN; | |
925 | if (!*timeo_p) | |
926 | return -EAGAIN; | |
927 | if (signal_pending(current)) | |
928 | return sock_intr_errno(*timeo_p); | |
929 | ||
930 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
931 | done = sk_wait_event(sk, timeo_p, | |
60120526 JPM |
932 | (!tsk->link_cong && |
933 | !tipc_sk_conn_cong(tsk)) || | |
934 | !tsk->port.connected); | |
391a6dd1 YX |
935 | finish_wait(sk_sleep(sk), &wait); |
936 | } while (!done); | |
937 | return 0; | |
938 | } | |
939 | ||
c4307285 | 940 | /** |
4ccfe5e0 JPM |
941 | * tipc_send_stream - send stream-oriented data |
942 | * @iocb: (unused) | |
b97bf3fd | 943 | * @sock: socket structure |
4ccfe5e0 JPM |
944 | * @m: data to send |
945 | * @dsz: total length of data to be transmitted | |
c4307285 | 946 | * |
4ccfe5e0 | 947 | * Used for SOCK_STREAM data. |
c4307285 | 948 | * |
4ccfe5e0 JPM |
949 | * Returns the number of bytes sent on success (or partial success), |
950 | * or errno if no data sent | |
b97bf3fd | 951 | */ |
4ccfe5e0 JPM |
952 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
953 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 954 | { |
0c3141e9 | 955 | struct sock *sk = sock->sk; |
58ed9442 | 956 | struct tipc_sock *tsk = tipc_sk(sk); |
4ccfe5e0 JPM |
957 | struct tipc_port *port = &tsk->port; |
958 | struct tipc_msg *mhdr = &port->phdr; | |
959 | struct sk_buff *buf; | |
342dfc30 | 960 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
4ccfe5e0 JPM |
961 | u32 ref = port->ref; |
962 | int rc = -EINVAL; | |
391a6dd1 | 963 | long timeo; |
4ccfe5e0 JPM |
964 | u32 dnode; |
965 | uint mtu, send, sent = 0; | |
b97bf3fd PL |
966 | |
967 | /* Handle implied connection establishment */ | |
4ccfe5e0 JPM |
968 | if (unlikely(dest)) { |
969 | rc = tipc_sendmsg(iocb, sock, m, dsz); | |
970 | if (dsz && (dsz == rc)) | |
60120526 | 971 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
972 | return rc; |
973 | } | |
974 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
975 | return -EMSGSIZE; |
976 | ||
0c3141e9 AS |
977 | if (iocb) |
978 | lock_sock(sk); | |
b97bf3fd | 979 | |
391a6dd1 YX |
980 | if (unlikely(sock->state != SS_CONNECTED)) { |
981 | if (sock->state == SS_DISCONNECTING) | |
4ccfe5e0 | 982 | rc = -EPIPE; |
391a6dd1 | 983 | else |
4ccfe5e0 | 984 | rc = -ENOTCONN; |
391a6dd1 YX |
985 | goto exit; |
986 | } | |
1d835874 | 987 | |
391a6dd1 | 988 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
4ccfe5e0 | 989 | dnode = tipc_port_peernode(port); |
4ccfe5e0 JPM |
990 | |
991 | next: | |
992 | mtu = port->max_pkt; | |
993 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); | |
9fbfb8b1 | 994 | rc = tipc_msg_build(mhdr, m->msg_iov, sent, send, mtu, &buf); |
4ccfe5e0 JPM |
995 | if (unlikely(rc < 0)) |
996 | goto exit; | |
c4307285 | 997 | do { |
60120526 | 998 | if (likely(!tipc_sk_conn_cong(tsk))) { |
9fbfb8b1 | 999 | rc = tipc_link_xmit(buf, dnode, ref); |
4ccfe5e0 | 1000 | if (likely(!rc)) { |
60120526 | 1001 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1002 | sent += send; |
1003 | if (sent == dsz) | |
1004 | break; | |
1005 | goto next; | |
1006 | } | |
1007 | if (rc == -EMSGSIZE) { | |
1008 | port->max_pkt = tipc_node_get_mtu(dnode, ref); | |
1009 | goto next; | |
1010 | } | |
1011 | if (rc != -ELINKCONG) | |
1012 | break; | |
50100a5e | 1013 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1014 | } |
1015 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb EH |
1016 | if (rc) |
1017 | kfree_skb_list(buf); | |
4ccfe5e0 | 1018 | } while (!rc); |
391a6dd1 | 1019 | exit: |
0c3141e9 AS |
1020 | if (iocb) |
1021 | release_sock(sk); | |
4ccfe5e0 | 1022 | return sent ? sent : rc; |
b97bf3fd PL |
1023 | } |
1024 | ||
c4307285 | 1025 | /** |
4ccfe5e0 JPM |
1026 | * tipc_send_packet - send a connection-oriented message |
1027 | * @iocb: if NULL, indicates that socket lock is already held | |
b97bf3fd | 1028 | * @sock: socket structure |
4ccfe5e0 JPM |
1029 | * @m: message to send |
1030 | * @dsz: length of data to be transmitted | |
c4307285 | 1031 | * |
4ccfe5e0 | 1032 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1033 | * |
4ccfe5e0 | 1034 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1035 | */ |
4ccfe5e0 JPM |
1036 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
1037 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1038 | { |
4ccfe5e0 JPM |
1039 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1040 | return -EMSGSIZE; | |
b97bf3fd | 1041 | |
4ccfe5e0 | 1042 | return tipc_send_stream(iocb, sock, m, dsz); |
b97bf3fd PL |
1043 | } |
1044 | ||
dadebc00 | 1045 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1046 | */ |
dadebc00 JPM |
1047 | static void tipc_sk_finish_conn(struct tipc_port *port, u32 peer_port, |
1048 | u32 peer_node) | |
b97bf3fd | 1049 | { |
dadebc00 | 1050 | struct tipc_msg *msg = &port->phdr; |
b97bf3fd | 1051 | |
dadebc00 JPM |
1052 | msg_set_destnode(msg, peer_node); |
1053 | msg_set_destport(msg, peer_port); | |
1054 | msg_set_type(msg, TIPC_CONN_MSG); | |
1055 | msg_set_lookup_scope(msg, 0); | |
1056 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1057 | |
dadebc00 JPM |
1058 | port->probing_interval = CONN_PROBING_INTERVAL; |
1059 | port->probing_state = TIPC_CONN_OK; | |
1060 | port->connected = 1; | |
1061 | k_start_timer(&port->timer, port->probing_interval); | |
1062 | tipc_node_add_conn(peer_node, port->ref, peer_port); | |
1063 | port->max_pkt = tipc_node_get_mtu(peer_node, port->ref); | |
b97bf3fd PL |
1064 | } |
1065 | ||
1066 | /** | |
1067 | * set_orig_addr - capture sender's address for received message | |
1068 | * @m: descriptor for message info | |
1069 | * @msg: received message header | |
c4307285 | 1070 | * |
b97bf3fd PL |
1071 | * Note: Address is not captured if not requested by receiver. |
1072 | */ | |
05790c64 | 1073 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1074 | { |
342dfc30 | 1075 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1076 | |
c4307285 | 1077 | if (addr) { |
b97bf3fd PL |
1078 | addr->family = AF_TIPC; |
1079 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1080 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1081 | addr->addr.id.ref = msg_origport(msg); |
1082 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1083 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1084 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1085 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /** | |
c4307285 | 1090 | * anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1091 | * @m: descriptor for message info |
1092 | * @msg: received message header | |
1093 | * @tport: TIPC port associated with message | |
c4307285 | 1094 | * |
b97bf3fd | 1095 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1096 | * |
b97bf3fd PL |
1097 | * Returns 0 if successful, otherwise errno |
1098 | */ | |
05790c64 | 1099 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
ae8509c4 | 1100 | struct tipc_port *tport) |
b97bf3fd PL |
1101 | { |
1102 | u32 anc_data[3]; | |
1103 | u32 err; | |
1104 | u32 dest_type; | |
3546c750 | 1105 | int has_name; |
b97bf3fd PL |
1106 | int res; |
1107 | ||
1108 | if (likely(m->msg_controllen == 0)) | |
1109 | return 0; | |
1110 | ||
1111 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1112 | err = msg ? msg_errcode(msg) : 0; |
1113 | if (unlikely(err)) { | |
1114 | anc_data[0] = err; | |
1115 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1116 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1117 | if (res) | |
b97bf3fd | 1118 | return res; |
2db9983a AS |
1119 | if (anc_data[1]) { |
1120 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1121 | msg_data(msg)); | |
1122 | if (res) | |
1123 | return res; | |
1124 | } | |
b97bf3fd PL |
1125 | } |
1126 | ||
1127 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1128 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1129 | switch (dest_type) { | |
1130 | case TIPC_NAMED_MSG: | |
3546c750 | 1131 | has_name = 1; |
b97bf3fd PL |
1132 | anc_data[0] = msg_nametype(msg); |
1133 | anc_data[1] = msg_namelower(msg); | |
1134 | anc_data[2] = msg_namelower(msg); | |
1135 | break; | |
1136 | case TIPC_MCAST_MSG: | |
3546c750 | 1137 | has_name = 1; |
b97bf3fd PL |
1138 | anc_data[0] = msg_nametype(msg); |
1139 | anc_data[1] = msg_namelower(msg); | |
1140 | anc_data[2] = msg_nameupper(msg); | |
1141 | break; | |
1142 | case TIPC_CONN_MSG: | |
3546c750 | 1143 | has_name = (tport->conn_type != 0); |
b97bf3fd PL |
1144 | anc_data[0] = tport->conn_type; |
1145 | anc_data[1] = tport->conn_instance; | |
1146 | anc_data[2] = tport->conn_instance; | |
1147 | break; | |
1148 | default: | |
3546c750 | 1149 | has_name = 0; |
b97bf3fd | 1150 | } |
2db9983a AS |
1151 | if (has_name) { |
1152 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1153 | if (res) | |
1154 | return res; | |
1155 | } | |
b97bf3fd PL |
1156 | |
1157 | return 0; | |
1158 | } | |
1159 | ||
739f5e4e JPM |
1160 | static void tipc_sk_send_ack(struct tipc_port *port, uint ack) |
1161 | { | |
1162 | struct sk_buff *buf = NULL; | |
1163 | struct tipc_msg *msg; | |
1164 | u32 peer_port = tipc_port_peerport(port); | |
1165 | u32 dnode = tipc_port_peernode(port); | |
1166 | ||
1167 | if (!port->connected) | |
1168 | return; | |
1169 | buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, | |
1170 | tipc_own_addr, peer_port, port->ref, TIPC_OK); | |
1171 | if (!buf) | |
1172 | return; | |
1173 | msg = buf_msg(buf); | |
1174 | msg_set_msgcnt(msg, ack); | |
1175 | tipc_link_xmit(buf, dnode, msg_link_selector(msg)); | |
1176 | } | |
1177 | ||
85d3fc94 | 1178 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1179 | { |
1180 | struct sock *sk = sock->sk; | |
1181 | DEFINE_WAIT(wait); | |
85d3fc94 | 1182 | long timeo = *timeop; |
9bbb4ecc YX |
1183 | int err; |
1184 | ||
1185 | for (;;) { | |
1186 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1187 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1188 | if (sock->state == SS_DISCONNECTING) { |
1189 | err = -ENOTCONN; | |
1190 | break; | |
1191 | } | |
1192 | release_sock(sk); | |
1193 | timeo = schedule_timeout(timeo); | |
1194 | lock_sock(sk); | |
1195 | } | |
1196 | err = 0; | |
1197 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1198 | break; | |
1199 | err = sock_intr_errno(timeo); | |
1200 | if (signal_pending(current)) | |
1201 | break; | |
1202 | err = -EAGAIN; | |
1203 | if (!timeo) | |
1204 | break; | |
1205 | } | |
1206 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1207 | *timeop = timeo; |
9bbb4ecc YX |
1208 | return err; |
1209 | } | |
1210 | ||
c4307285 | 1211 | /** |
247f0f3c | 1212 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1213 | * @iocb: (unused) |
1214 | * @m: descriptor for message info | |
1215 | * @buf_len: total size of user buffer area | |
1216 | * @flags: receive flags | |
c4307285 | 1217 | * |
b97bf3fd PL |
1218 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1219 | * If the complete message doesn't fit in user area, truncate it. | |
1220 | * | |
1221 | * Returns size of returned message data, errno otherwise | |
1222 | */ | |
247f0f3c YX |
1223 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1224 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1225 | { |
0c3141e9 | 1226 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1227 | struct tipc_sock *tsk = tipc_sk(sk); |
1228 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1229 | struct sk_buff *buf; |
1230 | struct tipc_msg *msg; | |
9bbb4ecc | 1231 | long timeo; |
b97bf3fd PL |
1232 | unsigned int sz; |
1233 | u32 err; | |
1234 | int res; | |
1235 | ||
0c3141e9 | 1236 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1237 | if (unlikely(!buf_len)) |
1238 | return -EINVAL; | |
1239 | ||
0c3141e9 | 1240 | lock_sock(sk); |
b97bf3fd | 1241 | |
0c3141e9 AS |
1242 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1243 | res = -ENOTCONN; | |
b97bf3fd PL |
1244 | goto exit; |
1245 | } | |
1246 | ||
9bbb4ecc | 1247 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1248 | restart: |
b97bf3fd | 1249 | |
0c3141e9 | 1250 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1251 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1252 | if (res) |
1253 | goto exit; | |
b97bf3fd | 1254 | |
0c3141e9 | 1255 | /* Look at first message in receive queue */ |
0c3141e9 | 1256 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1257 | msg = buf_msg(buf); |
1258 | sz = msg_data_sz(msg); | |
1259 | err = msg_errcode(msg); | |
1260 | ||
b97bf3fd | 1261 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1262 | if ((!sz) && (!err)) { |
0c3141e9 | 1263 | advance_rx_queue(sk); |
b97bf3fd PL |
1264 | goto restart; |
1265 | } | |
1266 | ||
1267 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1268 | set_orig_addr(m, msg); |
1269 | ||
1270 | /* Capture ancillary data (optional) */ | |
58ed9442 | 1271 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1272 | if (res) |
b97bf3fd PL |
1273 | goto exit; |
1274 | ||
1275 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1276 | if (!err) { |
1277 | if (unlikely(buf_len < sz)) { | |
1278 | sz = buf_len; | |
1279 | m->msg_flags |= MSG_TRUNC; | |
1280 | } | |
0232fd0a AS |
1281 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
1282 | m->msg_iov, sz); | |
1283 | if (res) | |
b97bf3fd | 1284 | goto exit; |
b97bf3fd PL |
1285 | res = sz; |
1286 | } else { | |
1287 | if ((sock->state == SS_READY) || | |
1288 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1289 | res = 0; | |
1290 | else | |
1291 | res = -ECONNRESET; | |
1292 | } | |
1293 | ||
1294 | /* Consume received message (optional) */ | |
b97bf3fd | 1295 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1296 | if ((sock->state != SS_READY) && |
60120526 | 1297 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
739f5e4e | 1298 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
60120526 JPM |
1299 | tsk->rcv_unacked = 0; |
1300 | } | |
0c3141e9 | 1301 | advance_rx_queue(sk); |
c4307285 | 1302 | } |
b97bf3fd | 1303 | exit: |
0c3141e9 | 1304 | release_sock(sk); |
b97bf3fd PL |
1305 | return res; |
1306 | } | |
1307 | ||
c4307285 | 1308 | /** |
247f0f3c | 1309 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1310 | * @iocb: (unused) |
1311 | * @m: descriptor for message info | |
1312 | * @buf_len: total size of user buffer area | |
1313 | * @flags: receive flags | |
c4307285 YH |
1314 | * |
1315 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1316 | * will optionally wait for more; never truncates data. |
1317 | * | |
1318 | * Returns size of returned message data, errno otherwise | |
1319 | */ | |
247f0f3c YX |
1320 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1321 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1322 | { |
0c3141e9 | 1323 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1324 | struct tipc_sock *tsk = tipc_sk(sk); |
1325 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1326 | struct sk_buff *buf; |
1327 | struct tipc_msg *msg; | |
9bbb4ecc | 1328 | long timeo; |
b97bf3fd | 1329 | unsigned int sz; |
3720d40b | 1330 | int sz_to_copy, target, needed; |
b97bf3fd | 1331 | int sz_copied = 0; |
b97bf3fd | 1332 | u32 err; |
0c3141e9 | 1333 | int res = 0; |
b97bf3fd | 1334 | |
0c3141e9 | 1335 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1336 | if (unlikely(!buf_len)) |
1337 | return -EINVAL; | |
1338 | ||
0c3141e9 | 1339 | lock_sock(sk); |
b97bf3fd | 1340 | |
9bbb4ecc | 1341 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1342 | res = -ENOTCONN; |
b97bf3fd PL |
1343 | goto exit; |
1344 | } | |
1345 | ||
3720d40b | 1346 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1347 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1348 | |
617d3c7a | 1349 | restart: |
0c3141e9 | 1350 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1351 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1352 | if (res) |
1353 | goto exit; | |
b97bf3fd | 1354 | |
0c3141e9 | 1355 | /* Look at first message in receive queue */ |
0c3141e9 | 1356 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1357 | msg = buf_msg(buf); |
1358 | sz = msg_data_sz(msg); | |
1359 | err = msg_errcode(msg); | |
1360 | ||
1361 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1362 | if ((!sz) && (!err)) { |
0c3141e9 | 1363 | advance_rx_queue(sk); |
b97bf3fd PL |
1364 | goto restart; |
1365 | } | |
1366 | ||
1367 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1368 | if (sz_copied == 0) { |
1369 | set_orig_addr(m, msg); | |
58ed9442 | 1370 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1371 | if (res) |
b97bf3fd PL |
1372 | goto exit; |
1373 | } | |
1374 | ||
1375 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1376 | if (!err) { |
0232fd0a | 1377 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1378 | |
0232fd0a | 1379 | sz -= offset; |
b97bf3fd PL |
1380 | needed = (buf_len - sz_copied); |
1381 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a AS |
1382 | |
1383 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, | |
1384 | m->msg_iov, sz_to_copy); | |
1385 | if (res) | |
b97bf3fd | 1386 | goto exit; |
0232fd0a | 1387 | |
b97bf3fd PL |
1388 | sz_copied += sz_to_copy; |
1389 | ||
1390 | if (sz_to_copy < sz) { | |
1391 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1392 | TIPC_SKB_CB(buf)->handle = |
1393 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1394 | goto exit; |
1395 | } | |
b97bf3fd PL |
1396 | } else { |
1397 | if (sz_copied != 0) | |
1398 | goto exit; /* can't add error msg to valid data */ | |
1399 | ||
1400 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1401 | res = 0; | |
1402 | else | |
1403 | res = -ECONNRESET; | |
1404 | } | |
1405 | ||
1406 | /* Consume received message (optional) */ | |
b97bf3fd | 1407 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1408 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
739f5e4e | 1409 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
60120526 JPM |
1410 | tsk->rcv_unacked = 0; |
1411 | } | |
0c3141e9 | 1412 | advance_rx_queue(sk); |
c4307285 | 1413 | } |
b97bf3fd PL |
1414 | |
1415 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1416 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1417 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1418 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1419 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1420 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1421 | goto restart; |
1422 | ||
1423 | exit: | |
0c3141e9 | 1424 | release_sock(sk); |
a3b0a5a9 | 1425 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1426 | } |
1427 | ||
f288bef4 YX |
1428 | /** |
1429 | * tipc_write_space - wake up thread if port congestion is released | |
1430 | * @sk: socket | |
1431 | */ | |
1432 | static void tipc_write_space(struct sock *sk) | |
1433 | { | |
1434 | struct socket_wq *wq; | |
1435 | ||
1436 | rcu_read_lock(); | |
1437 | wq = rcu_dereference(sk->sk_wq); | |
1438 | if (wq_has_sleeper(wq)) | |
1439 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1440 | POLLWRNORM | POLLWRBAND); | |
1441 | rcu_read_unlock(); | |
1442 | } | |
1443 | ||
1444 | /** | |
1445 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1446 | * @sk: socket | |
1447 | * @len: the length of messages | |
1448 | */ | |
676d2369 | 1449 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1450 | { |
1451 | struct socket_wq *wq; | |
1452 | ||
1453 | rcu_read_lock(); | |
1454 | wq = rcu_dereference(sk->sk_wq); | |
1455 | if (wq_has_sleeper(wq)) | |
1456 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1457 | POLLRDNORM | POLLRDBAND); | |
1458 | rcu_read_unlock(); | |
1459 | } | |
1460 | ||
7e6c131e YX |
1461 | /** |
1462 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1463 | * @tsk: TIPC socket |
7e6c131e YX |
1464 | * @msg: message |
1465 | * | |
e4de5fab | 1466 | * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1467 | */ |
e4de5fab | 1468 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
7e6c131e | 1469 | { |
58ed9442 JPM |
1470 | struct sock *sk = &tsk->sk; |
1471 | struct tipc_port *port = &tsk->port; | |
8826cde6 | 1472 | struct socket *sock = sk->sk_socket; |
7e6c131e | 1473 | struct tipc_msg *msg = buf_msg(*buf); |
8826cde6 | 1474 | |
e4de5fab | 1475 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1476 | |
1477 | if (msg_mcast(msg)) | |
1478 | return retval; | |
1479 | ||
1480 | switch ((int)sock->state) { | |
1481 | case SS_CONNECTED: | |
1482 | /* Accept only connection-based messages sent by peer */ | |
0fc87aae | 1483 | if (tipc_sk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1484 | if (unlikely(msg_errcode(msg))) { |
1485 | sock->state = SS_DISCONNECTING; | |
dadebc00 JPM |
1486 | port->connected = 0; |
1487 | /* let timer expire on it's own */ | |
1488 | tipc_node_remove_conn(tipc_port_peernode(port), | |
1489 | port->ref); | |
7e6c131e YX |
1490 | } |
1491 | retval = TIPC_OK; | |
1492 | } | |
1493 | break; | |
1494 | case SS_CONNECTING: | |
1495 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1496 | |
1497 | if (unlikely(!msg_connected(msg))) | |
1498 | break; | |
1499 | ||
584d24b3 YX |
1500 | if (unlikely(msg_errcode(msg))) { |
1501 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1502 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1503 | retval = TIPC_OK; |
1504 | break; | |
1505 | } | |
1506 | ||
dadebc00 | 1507 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1508 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1509 | sk->sk_err = EINVAL; |
7e6c131e | 1510 | retval = TIPC_OK; |
584d24b3 YX |
1511 | break; |
1512 | } | |
1513 | ||
dadebc00 JPM |
1514 | tipc_sk_finish_conn(port, msg_origport(msg), msg_orignode(msg)); |
1515 | msg_set_importance(&port->phdr, msg_importance(msg)); | |
1516 | sock->state = SS_CONNECTED; | |
1517 | ||
584d24b3 YX |
1518 | /* If an incoming message is an 'ACK-', it should be |
1519 | * discarded here because it doesn't contain useful | |
1520 | * data. In addition, we should try to wake up | |
1521 | * connect() routine if sleeping. | |
1522 | */ | |
1523 | if (msg_data_sz(msg) == 0) { | |
1524 | kfree_skb(*buf); | |
1525 | *buf = NULL; | |
1526 | if (waitqueue_active(sk_sleep(sk))) | |
1527 | wake_up_interruptible(sk_sleep(sk)); | |
1528 | } | |
1529 | retval = TIPC_OK; | |
7e6c131e YX |
1530 | break; |
1531 | case SS_LISTENING: | |
1532 | case SS_UNCONNECTED: | |
1533 | /* Accept only SYN message */ | |
1534 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1535 | retval = TIPC_OK; | |
1536 | break; | |
1537 | case SS_DISCONNECTING: | |
1538 | break; | |
1539 | default: | |
1540 | pr_err("Unknown socket state %u\n", sock->state); | |
1541 | } | |
1542 | return retval; | |
1543 | } | |
1544 | ||
aba79f33 YX |
1545 | /** |
1546 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1547 | * @sk: socket | |
1548 | * @buf: message | |
1549 | * | |
1550 | * For all connection oriented messages, irrespective of importance, | |
1551 | * the default overload value (i.e. 67MB) is set as limit. | |
1552 | * | |
1553 | * For all connectionless messages, by default new queue limits are | |
1554 | * as belows: | |
1555 | * | |
cc79dd1b YX |
1556 | * TIPC_LOW_IMPORTANCE (4 MB) |
1557 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1558 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1559 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1560 | * |
1561 | * Returns overload limit according to corresponding message importance | |
1562 | */ | |
1563 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1564 | { | |
1565 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1566 | |
1567 | if (msg_connected(msg)) | |
0cee6bbe | 1568 | return sysctl_tipc_rmem[2]; |
1569 | ||
1570 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1571 | msg_importance(msg); | |
aba79f33 YX |
1572 | } |
1573 | ||
c4307285 | 1574 | /** |
0c3141e9 AS |
1575 | * filter_rcv - validate incoming message |
1576 | * @sk: socket | |
b97bf3fd | 1577 | * @buf: message |
c4307285 | 1578 | * |
0c3141e9 AS |
1579 | * Enqueues message on receive queue if acceptable; optionally handles |
1580 | * disconnect indication for a connected socket. | |
1581 | * | |
1582 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1583 | * |
e4de5fab | 1584 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
ac0074ee | 1585 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
b97bf3fd | 1586 | */ |
e4de5fab | 1587 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1588 | { |
0c3141e9 | 1589 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1590 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd | 1591 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1592 | unsigned int limit = rcvbuf_limit(sk, buf); |
ac0074ee | 1593 | u32 onode; |
e4de5fab | 1594 | int rc = TIPC_OK; |
b97bf3fd | 1595 | |
ac0074ee JPM |
1596 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
1597 | return tipc_sk_proto_rcv(tsk, &onode, buf); | |
ec8a2e56 | 1598 | |
50100a5e JPM |
1599 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1600 | kfree_skb(buf); | |
1601 | tsk->link_cong = 0; | |
1602 | sk->sk_write_space(sk); | |
1603 | return TIPC_OK; | |
1604 | } | |
1605 | ||
b97bf3fd | 1606 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1607 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1608 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1609 | |
b97bf3fd | 1610 | if (sock->state == SS_READY) { |
b29f1428 | 1611 | if (msg_connected(msg)) |
e4de5fab | 1612 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1613 | } else { |
e4de5fab JPM |
1614 | rc = filter_connect(tsk, &buf); |
1615 | if (rc != TIPC_OK || buf == NULL) | |
1616 | return rc; | |
b97bf3fd PL |
1617 | } |
1618 | ||
1619 | /* Reject message if there isn't room to queue it */ | |
aba79f33 | 1620 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
e4de5fab | 1621 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1622 | |
aba79f33 | 1623 | /* Enqueue message */ |
40682432 | 1624 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1625 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1626 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1627 | |
676d2369 | 1628 | sk->sk_data_ready(sk); |
0c3141e9 AS |
1629 | return TIPC_OK; |
1630 | } | |
b97bf3fd | 1631 | |
0c3141e9 | 1632 | /** |
4f4482dc | 1633 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 AS |
1634 | * @sk: socket |
1635 | * @buf: message | |
1636 | * | |
1637 | * Caller must hold socket lock, but not port lock. | |
1638 | * | |
1639 | * Returns 0 | |
1640 | */ | |
4f4482dc | 1641 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf) |
0c3141e9 | 1642 | { |
e4de5fab | 1643 | int rc; |
8db1bae3 | 1644 | u32 onode; |
4f4482dc | 1645 | struct tipc_sock *tsk = tipc_sk(sk); |
02c00c2a | 1646 | uint truesize = buf->truesize; |
0c3141e9 | 1647 | |
e4de5fab | 1648 | rc = filter_rcv(sk, buf); |
4f4482dc | 1649 | |
ac0074ee JPM |
1650 | if (likely(!rc)) { |
1651 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1652 | atomic_add(truesize, &tsk->dupl_rcvcnt); | |
1653 | return 0; | |
1654 | } | |
1655 | ||
1656 | if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc)) | |
1657 | return 0; | |
1658 | ||
9fbfb8b1 | 1659 | tipc_link_xmit(buf, onode, 0); |
4f4482dc | 1660 | |
0c3141e9 AS |
1661 | return 0; |
1662 | } | |
1663 | ||
1664 | /** | |
24be34b5 | 1665 | * tipc_sk_rcv - handle incoming message |
9816f061 JPM |
1666 | * @buf: buffer containing arriving message |
1667 | * Consumes buffer | |
1668 | * Returns 0 if success, or errno: -EHOSTUNREACH | |
0c3141e9 | 1669 | */ |
9816f061 | 1670 | int tipc_sk_rcv(struct sk_buff *buf) |
0c3141e9 | 1671 | { |
9816f061 JPM |
1672 | struct tipc_sock *tsk; |
1673 | struct tipc_port *port; | |
1674 | struct sock *sk; | |
1675 | u32 dport = msg_destport(buf_msg(buf)); | |
e4de5fab | 1676 | int rc = TIPC_OK; |
4f4482dc | 1677 | uint limit; |
8db1bae3 | 1678 | u32 dnode; |
9816f061 | 1679 | |
5a379074 | 1680 | /* Validate destination and message */ |
6c9808ce | 1681 | tsk = tipc_sk_get(dport); |
9b50fd08 | 1682 | if (unlikely(!tsk)) { |
5a379074 | 1683 | rc = tipc_msg_eval(buf, &dnode); |
9816f061 JPM |
1684 | goto exit; |
1685 | } | |
9b50fd08 | 1686 | port = &tsk->port; |
9816f061 JPM |
1687 | sk = &tsk->sk; |
1688 | ||
1689 | /* Queue message */ | |
0c3141e9 | 1690 | bh_lock_sock(sk); |
9816f061 | 1691 | |
0c3141e9 | 1692 | if (!sock_owned_by_user(sk)) { |
e4de5fab | 1693 | rc = filter_rcv(sk, buf); |
0c3141e9 | 1694 | } else { |
4f4482dc JPM |
1695 | if (sk->sk_backlog.len == 0) |
1696 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
1697 | limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt); | |
1698 | if (sk_add_backlog(sk, buf, limit)) | |
e4de5fab | 1699 | rc = -TIPC_ERR_OVERLOAD; |
0c3141e9 AS |
1700 | } |
1701 | bh_unlock_sock(sk); | |
6c9808ce | 1702 | tipc_sk_put(tsk); |
e4de5fab | 1703 | if (likely(!rc)) |
9816f061 JPM |
1704 | return 0; |
1705 | exit: | |
5a379074 | 1706 | if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) |
8db1bae3 | 1707 | return -EHOSTUNREACH; |
5a379074 | 1708 | |
9fbfb8b1 | 1709 | tipc_link_xmit(buf, dnode, 0); |
5a379074 | 1710 | return (rc < 0) ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1711 | } |
1712 | ||
78eb3a53 YX |
1713 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1714 | { | |
1715 | struct sock *sk = sock->sk; | |
1716 | DEFINE_WAIT(wait); | |
1717 | int done; | |
1718 | ||
1719 | do { | |
1720 | int err = sock_error(sk); | |
1721 | if (err) | |
1722 | return err; | |
1723 | if (!*timeo_p) | |
1724 | return -ETIMEDOUT; | |
1725 | if (signal_pending(current)) | |
1726 | return sock_intr_errno(*timeo_p); | |
1727 | ||
1728 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1729 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1730 | finish_wait(sk_sleep(sk), &wait); | |
1731 | } while (!done); | |
1732 | return 0; | |
1733 | } | |
1734 | ||
b97bf3fd | 1735 | /** |
247f0f3c | 1736 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1737 | * @sock: socket structure |
1738 | * @dest: socket address for destination port | |
1739 | * @destlen: size of socket address data structure | |
0c3141e9 | 1740 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1741 | * |
1742 | * Returns 0 on success, errno otherwise | |
1743 | */ | |
247f0f3c YX |
1744 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1745 | int destlen, int flags) | |
b97bf3fd | 1746 | { |
0c3141e9 | 1747 | struct sock *sk = sock->sk; |
b89741a0 AS |
1748 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1749 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1750 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1751 | socket_state previous; | |
b89741a0 AS |
1752 | int res; |
1753 | ||
0c3141e9 AS |
1754 | lock_sock(sk); |
1755 | ||
b89741a0 | 1756 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1757 | if (sock->state == SS_READY) { |
1758 | res = -EOPNOTSUPP; | |
1759 | goto exit; | |
1760 | } | |
b89741a0 | 1761 | |
b89741a0 AS |
1762 | /* |
1763 | * Reject connection attempt using multicast address | |
1764 | * | |
1765 | * Note: send_msg() validates the rest of the address fields, | |
1766 | * so there's no need to do it here | |
1767 | */ | |
0c3141e9 AS |
1768 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1769 | res = -EINVAL; | |
1770 | goto exit; | |
1771 | } | |
1772 | ||
78eb3a53 | 1773 | previous = sock->state; |
584d24b3 YX |
1774 | switch (sock->state) { |
1775 | case SS_UNCONNECTED: | |
1776 | /* Send a 'SYN-' to destination */ | |
1777 | m.msg_name = dest; | |
1778 | m.msg_namelen = destlen; | |
1779 | ||
1780 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1781 | * indicate send_msg() is never blocked. | |
1782 | */ | |
1783 | if (!timeout) | |
1784 | m.msg_flags = MSG_DONTWAIT; | |
1785 | ||
247f0f3c | 1786 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1787 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1788 | goto exit; | |
1789 | ||
1790 | /* Just entered SS_CONNECTING state; the only | |
1791 | * difference is that return value in non-blocking | |
1792 | * case is EINPROGRESS, rather than EALREADY. | |
1793 | */ | |
1794 | res = -EINPROGRESS; | |
584d24b3 | 1795 | case SS_CONNECTING: |
78eb3a53 YX |
1796 | if (previous == SS_CONNECTING) |
1797 | res = -EALREADY; | |
1798 | if (!timeout) | |
1799 | goto exit; | |
1800 | timeout = msecs_to_jiffies(timeout); | |
1801 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1802 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1803 | break; |
1804 | case SS_CONNECTED: | |
1805 | res = -EISCONN; | |
1806 | break; | |
1807 | default: | |
1808 | res = -EINVAL; | |
78eb3a53 | 1809 | break; |
b89741a0 | 1810 | } |
0c3141e9 AS |
1811 | exit: |
1812 | release_sock(sk); | |
b89741a0 | 1813 | return res; |
b97bf3fd PL |
1814 | } |
1815 | ||
c4307285 | 1816 | /** |
247f0f3c | 1817 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1818 | * @sock: socket structure |
1819 | * @len: (unused) | |
c4307285 | 1820 | * |
b97bf3fd PL |
1821 | * Returns 0 on success, errno otherwise |
1822 | */ | |
247f0f3c | 1823 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1824 | { |
0c3141e9 AS |
1825 | struct sock *sk = sock->sk; |
1826 | int res; | |
1827 | ||
1828 | lock_sock(sk); | |
b97bf3fd | 1829 | |
245f3d34 | 1830 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1831 | res = -EINVAL; |
1832 | else { | |
1833 | sock->state = SS_LISTENING; | |
1834 | res = 0; | |
1835 | } | |
1836 | ||
1837 | release_sock(sk); | |
1838 | return res; | |
b97bf3fd PL |
1839 | } |
1840 | ||
6398e23c YX |
1841 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1842 | { | |
1843 | struct sock *sk = sock->sk; | |
1844 | DEFINE_WAIT(wait); | |
1845 | int err; | |
1846 | ||
1847 | /* True wake-one mechanism for incoming connections: only | |
1848 | * one process gets woken up, not the 'whole herd'. | |
1849 | * Since we do not 'race & poll' for established sockets | |
1850 | * anymore, the common case will execute the loop only once. | |
1851 | */ | |
1852 | for (;;) { | |
1853 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1854 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1855 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1856 | release_sock(sk); |
1857 | timeo = schedule_timeout(timeo); | |
1858 | lock_sock(sk); | |
1859 | } | |
1860 | err = 0; | |
1861 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1862 | break; | |
1863 | err = -EINVAL; | |
1864 | if (sock->state != SS_LISTENING) | |
1865 | break; | |
1866 | err = sock_intr_errno(timeo); | |
1867 | if (signal_pending(current)) | |
1868 | break; | |
1869 | err = -EAGAIN; | |
1870 | if (!timeo) | |
1871 | break; | |
1872 | } | |
1873 | finish_wait(sk_sleep(sk), &wait); | |
1874 | return err; | |
1875 | } | |
1876 | ||
c4307285 | 1877 | /** |
247f0f3c | 1878 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1879 | * @sock: listening socket |
1880 | * @newsock: new socket that is to be connected | |
1881 | * @flags: file-related flags associated with socket | |
c4307285 | 1882 | * |
b97bf3fd PL |
1883 | * Returns 0 on success, errno otherwise |
1884 | */ | |
247f0f3c | 1885 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1886 | { |
0fef8f20 | 1887 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1888 | struct sk_buff *buf; |
8826cde6 | 1889 | struct tipc_port *new_port; |
0fef8f20 | 1890 | struct tipc_msg *msg; |
6398e23c | 1891 | long timeo; |
0c3141e9 | 1892 | int res; |
b97bf3fd | 1893 | |
0c3141e9 | 1894 | lock_sock(sk); |
b97bf3fd | 1895 | |
0c3141e9 AS |
1896 | if (sock->state != SS_LISTENING) { |
1897 | res = -EINVAL; | |
b97bf3fd PL |
1898 | goto exit; |
1899 | } | |
6398e23c YX |
1900 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1901 | res = tipc_wait_for_accept(sock, timeo); | |
1902 | if (res) | |
1903 | goto exit; | |
0c3141e9 AS |
1904 | |
1905 | buf = skb_peek(&sk->sk_receive_queue); | |
1906 | ||
c5fa7b3c | 1907 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1908 | if (res) |
1909 | goto exit; | |
b97bf3fd | 1910 | |
0fef8f20 | 1911 | new_sk = new_sock->sk; |
58ed9442 | 1912 | new_port = &tipc_sk(new_sk)->port; |
0fef8f20 | 1913 | msg = buf_msg(buf); |
b97bf3fd | 1914 | |
0fef8f20 PG |
1915 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1916 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1917 | ||
1918 | /* | |
1919 | * Reject any stray messages received by new socket | |
1920 | * before the socket lock was taken (very, very unlikely) | |
1921 | */ | |
1922 | reject_rx_queue(new_sk); | |
1923 | ||
1924 | /* Connect new socket to it's peer */ | |
dadebc00 | 1925 | tipc_sk_finish_conn(new_port, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
1926 | new_sock->state = SS_CONNECTED; |
1927 | ||
3b4f302d | 1928 | tipc_port_set_importance(new_port, msg_importance(msg)); |
0fef8f20 | 1929 | if (msg_named(msg)) { |
8826cde6 JPM |
1930 | new_port->conn_type = msg_nametype(msg); |
1931 | new_port->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 1932 | } |
0fef8f20 PG |
1933 | |
1934 | /* | |
1935 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
1936 | * Respond to 'SYN+' by queuing it on new socket. | |
1937 | */ | |
1938 | if (!msg_data_sz(msg)) { | |
1939 | struct msghdr m = {NULL,}; | |
1940 | ||
1941 | advance_rx_queue(sk); | |
247f0f3c | 1942 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
1943 | } else { |
1944 | __skb_dequeue(&sk->sk_receive_queue); | |
1945 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 1946 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
1947 | } |
1948 | release_sock(new_sk); | |
b97bf3fd | 1949 | exit: |
0c3141e9 | 1950 | release_sock(sk); |
b97bf3fd PL |
1951 | return res; |
1952 | } | |
1953 | ||
1954 | /** | |
247f0f3c | 1955 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 1956 | * @sock: socket structure |
e247a8f5 | 1957 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
1958 | * |
1959 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 1960 | * |
b97bf3fd PL |
1961 | * Returns 0 on success, errno otherwise |
1962 | */ | |
247f0f3c | 1963 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 1964 | { |
0c3141e9 | 1965 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1966 | struct tipc_sock *tsk = tipc_sk(sk); |
1967 | struct tipc_port *port = &tsk->port; | |
b97bf3fd | 1968 | struct sk_buff *buf; |
80e44c22 | 1969 | u32 dnode; |
b97bf3fd PL |
1970 | int res; |
1971 | ||
e247a8f5 AS |
1972 | if (how != SHUT_RDWR) |
1973 | return -EINVAL; | |
b97bf3fd | 1974 | |
0c3141e9 | 1975 | lock_sock(sk); |
b97bf3fd PL |
1976 | |
1977 | switch (sock->state) { | |
0c3141e9 | 1978 | case SS_CONNECTING: |
b97bf3fd PL |
1979 | case SS_CONNECTED: |
1980 | ||
b97bf3fd | 1981 | restart: |
617d3c7a | 1982 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
0c3141e9 AS |
1983 | buf = __skb_dequeue(&sk->sk_receive_queue); |
1984 | if (buf) { | |
40682432 | 1985 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
5f6d9123 | 1986 | kfree_skb(buf); |
b97bf3fd PL |
1987 | goto restart; |
1988 | } | |
80e44c22 JPM |
1989 | if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN)) |
1990 | tipc_link_xmit(buf, dnode, port->ref); | |
dadebc00 | 1991 | tipc_node_remove_conn(dnode, port->ref); |
0c3141e9 | 1992 | } else { |
80e44c22 JPM |
1993 | dnode = tipc_port_peernode(port); |
1994 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
1995 | TIPC_CONN_MSG, SHORT_H_SIZE, | |
1996 | 0, dnode, tipc_own_addr, | |
1997 | tipc_port_peerport(port), | |
1998 | port->ref, TIPC_CONN_SHUTDOWN); | |
1999 | tipc_link_xmit(buf, dnode, port->ref); | |
b97bf3fd | 2000 | } |
dadebc00 | 2001 | port->connected = 0; |
0c3141e9 | 2002 | sock->state = SS_DISCONNECTING; |
dadebc00 | 2003 | tipc_node_remove_conn(dnode, port->ref); |
b97bf3fd PL |
2004 | /* fall through */ |
2005 | ||
2006 | case SS_DISCONNECTING: | |
2007 | ||
75031151 | 2008 | /* Discard any unreceived messages */ |
57467e56 | 2009 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2010 | |
2011 | /* Wake up anyone sleeping in poll */ | |
2012 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2013 | res = 0; |
2014 | break; | |
2015 | ||
2016 | default: | |
2017 | res = -ENOTCONN; | |
2018 | } | |
2019 | ||
0c3141e9 | 2020 | release_sock(sk); |
b97bf3fd PL |
2021 | return res; |
2022 | } | |
2023 | ||
57289015 JPM |
2024 | static void tipc_sk_timeout(unsigned long ref) |
2025 | { | |
6c9808ce | 2026 | struct tipc_sock *tsk; |
9b50fd08 | 2027 | struct tipc_port *port; |
57289015 JPM |
2028 | struct sock *sk; |
2029 | struct sk_buff *buf = NULL; | |
57289015 JPM |
2030 | u32 peer_port, peer_node; |
2031 | ||
6c9808ce | 2032 | tsk = tipc_sk_get(ref); |
9b50fd08 | 2033 | if (!tsk) |
6c9808ce JPM |
2034 | goto exit; |
2035 | sk = &tsk->sk; | |
9b50fd08 | 2036 | port = &tsk->port; |
6c9808ce JPM |
2037 | |
2038 | bh_lock_sock(sk); | |
57289015 | 2039 | if (!port->connected) { |
6c9808ce JPM |
2040 | bh_unlock_sock(sk); |
2041 | goto exit; | |
57289015 | 2042 | } |
57289015 JPM |
2043 | peer_port = tipc_port_peerport(port); |
2044 | peer_node = tipc_port_peernode(port); | |
2045 | ||
2046 | if (port->probing_state == TIPC_CONN_PROBING) { | |
2047 | /* Previous probe not answered -> self abort */ | |
2048 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, | |
2049 | SHORT_H_SIZE, 0, tipc_own_addr, | |
2050 | peer_node, ref, peer_port, | |
2051 | TIPC_ERR_NO_PORT); | |
2052 | } else { | |
2053 | buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, | |
2054 | 0, peer_node, tipc_own_addr, | |
2055 | peer_port, ref, TIPC_OK); | |
2056 | port->probing_state = TIPC_CONN_PROBING; | |
2057 | k_start_timer(&port->timer, port->probing_interval); | |
2058 | } | |
2059 | bh_unlock_sock(sk); | |
6c9808ce JPM |
2060 | if (buf) |
2061 | tipc_link_xmit(buf, peer_node, ref); | |
2062 | exit: | |
2063 | tipc_sk_put(tsk); | |
57289015 JPM |
2064 | } |
2065 | ||
0fc87aae JPM |
2066 | static int tipc_sk_publish(struct tipc_port *port, uint scope, |
2067 | struct tipc_name_seq const *seq) | |
2068 | { | |
2069 | struct publication *publ; | |
2070 | u32 key; | |
2071 | ||
2072 | if (port->connected) | |
2073 | return -EINVAL; | |
2074 | key = port->ref + port->pub_count + 1; | |
2075 | if (key == port->ref) | |
2076 | return -EADDRINUSE; | |
2077 | ||
2078 | publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper, | |
2079 | scope, port->ref, key); | |
2080 | if (unlikely(!publ)) | |
2081 | return -EINVAL; | |
2082 | ||
2083 | list_add(&publ->pport_list, &port->publications); | |
2084 | port->pub_count++; | |
2085 | port->published = 1; | |
2086 | return 0; | |
2087 | } | |
2088 | ||
2089 | static int tipc_sk_withdraw(struct tipc_port *port, uint scope, | |
2090 | struct tipc_name_seq const *seq) | |
2091 | { | |
2092 | struct publication *publ; | |
2093 | struct publication *safe; | |
2094 | int rc = -EINVAL; | |
2095 | ||
2096 | list_for_each_entry_safe(publ, safe, &port->publications, pport_list) { | |
2097 | if (seq) { | |
2098 | if (publ->scope != scope) | |
2099 | continue; | |
2100 | if (publ->type != seq->type) | |
2101 | continue; | |
2102 | if (publ->lower != seq->lower) | |
2103 | continue; | |
2104 | if (publ->upper != seq->upper) | |
2105 | break; | |
2106 | tipc_nametbl_withdraw(publ->type, publ->lower, | |
2107 | publ->ref, publ->key); | |
2108 | rc = 0; | |
2109 | break; | |
2110 | } | |
2111 | tipc_nametbl_withdraw(publ->type, publ->lower, | |
2112 | publ->ref, publ->key); | |
2113 | rc = 0; | |
2114 | } | |
2115 | if (list_empty(&port->publications)) | |
2116 | port->published = 0; | |
2117 | return rc; | |
2118 | } | |
2119 | ||
5a9ee0be JPM |
2120 | static int tipc_sk_show(struct tipc_port *port, char *buf, |
2121 | int len, int full_id) | |
2122 | { | |
2123 | struct publication *publ; | |
2124 | int ret; | |
2125 | ||
2126 | if (full_id) | |
2127 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", | |
2128 | tipc_zone(tipc_own_addr), | |
2129 | tipc_cluster(tipc_own_addr), | |
2130 | tipc_node(tipc_own_addr), port->ref); | |
2131 | else | |
2132 | ret = tipc_snprintf(buf, len, "%-10u:", port->ref); | |
2133 | ||
2134 | if (port->connected) { | |
2135 | u32 dport = tipc_port_peerport(port); | |
2136 | u32 destnode = tipc_port_peernode(port); | |
2137 | ||
2138 | ret += tipc_snprintf(buf + ret, len - ret, | |
2139 | " connected to <%u.%u.%u:%u>", | |
2140 | tipc_zone(destnode), | |
2141 | tipc_cluster(destnode), | |
2142 | tipc_node(destnode), dport); | |
2143 | if (port->conn_type != 0) | |
2144 | ret += tipc_snprintf(buf + ret, len - ret, | |
2145 | " via {%u,%u}", port->conn_type, | |
2146 | port->conn_instance); | |
2147 | } else if (port->published) { | |
2148 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); | |
2149 | list_for_each_entry(publ, &port->publications, pport_list) { | |
2150 | if (publ->lower == publ->upper) | |
2151 | ret += tipc_snprintf(buf + ret, len - ret, | |
2152 | " {%u,%u}", publ->type, | |
2153 | publ->lower); | |
2154 | else | |
2155 | ret += tipc_snprintf(buf + ret, len - ret, | |
2156 | " {%u,%u,%u}", publ->type, | |
2157 | publ->lower, publ->upper); | |
2158 | } | |
2159 | } | |
2160 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); | |
2161 | return ret; | |
2162 | } | |
2163 | ||
2164 | struct sk_buff *tipc_sk_socks_show(void) | |
2165 | { | |
2166 | struct sk_buff *buf; | |
2167 | struct tlv_desc *rep_tlv; | |
2168 | char *pb; | |
2169 | int pb_len; | |
2170 | struct tipc_sock *tsk; | |
2171 | int str_len = 0; | |
2172 | u32 ref = 0; | |
2173 | ||
2174 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); | |
2175 | if (!buf) | |
2176 | return NULL; | |
2177 | rep_tlv = (struct tlv_desc *)buf->data; | |
2178 | pb = TLV_DATA(rep_tlv); | |
2179 | pb_len = ULTRA_STRING_MAX_LEN; | |
2180 | ||
6c9808ce JPM |
2181 | tsk = tipc_sk_get_next(&ref); |
2182 | for (; tsk; tsk = tipc_sk_get_next(&ref)) { | |
2183 | lock_sock(&tsk->sk); | |
5a9ee0be JPM |
2184 | str_len += tipc_sk_show(&tsk->port, pb + str_len, |
2185 | pb_len - str_len, 0); | |
6c9808ce JPM |
2186 | release_sock(&tsk->sk); |
2187 | tipc_sk_put(tsk); | |
5a9ee0be JPM |
2188 | } |
2189 | str_len += 1; /* for "\0" */ | |
2190 | skb_put(buf, TLV_SPACE(str_len)); | |
2191 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
2192 | ||
2193 | return buf; | |
2194 | } | |
2195 | ||
2196 | /* tipc_sk_reinit: set non-zero address in all existing sockets | |
2197 | * when we go from standalone to network mode. | |
2198 | */ | |
2199 | void tipc_sk_reinit(void) | |
2200 | { | |
2201 | struct tipc_msg *msg; | |
2202 | u32 ref = 0; | |
6c9808ce | 2203 | struct tipc_sock *tsk = tipc_sk_get_next(&ref); |
5a9ee0be | 2204 | |
6c9808ce JPM |
2205 | for (; tsk; tsk = tipc_sk_get_next(&ref)) { |
2206 | lock_sock(&tsk->sk); | |
5a9ee0be JPM |
2207 | msg = &tsk->port.phdr; |
2208 | msg_set_prevnode(msg, tipc_own_addr); | |
2209 | msg_set_orignode(msg, tipc_own_addr); | |
6c9808ce JPM |
2210 | release_sock(&tsk->sk); |
2211 | tipc_sk_put(tsk); | |
5a9ee0be JPM |
2212 | } |
2213 | } | |
2214 | ||
b97bf3fd | 2215 | /** |
247f0f3c | 2216 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2217 | * @sock: socket structure |
2218 | * @lvl: option level | |
2219 | * @opt: option identifier | |
2220 | * @ov: pointer to new option value | |
2221 | * @ol: length of option value | |
c4307285 YH |
2222 | * |
2223 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2224 | * (to ease compatibility). |
c4307285 | 2225 | * |
b97bf3fd PL |
2226 | * Returns 0 on success, errno otherwise |
2227 | */ | |
247f0f3c YX |
2228 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2229 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2230 | { |
0c3141e9 | 2231 | struct sock *sk = sock->sk; |
58ed9442 JPM |
2232 | struct tipc_sock *tsk = tipc_sk(sk); |
2233 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
2234 | u32 value; |
2235 | int res; | |
2236 | ||
c4307285 YH |
2237 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2238 | return 0; | |
b97bf3fd PL |
2239 | if (lvl != SOL_TIPC) |
2240 | return -ENOPROTOOPT; | |
2241 | if (ol < sizeof(value)) | |
2242 | return -EINVAL; | |
2db9983a AS |
2243 | res = get_user(value, (u32 __user *)ov); |
2244 | if (res) | |
b97bf3fd PL |
2245 | return res; |
2246 | ||
0c3141e9 | 2247 | lock_sock(sk); |
c4307285 | 2248 | |
b97bf3fd PL |
2249 | switch (opt) { |
2250 | case TIPC_IMPORTANCE: | |
ac32c7f7 | 2251 | res = tipc_port_set_importance(port, value); |
b97bf3fd PL |
2252 | break; |
2253 | case TIPC_SRC_DROPPABLE: | |
2254 | if (sock->type != SOCK_STREAM) | |
58ed9442 | 2255 | tipc_port_set_unreliable(port, value); |
c4307285 | 2256 | else |
b97bf3fd PL |
2257 | res = -ENOPROTOOPT; |
2258 | break; | |
2259 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 2260 | tipc_port_set_unreturnable(port, value); |
b97bf3fd PL |
2261 | break; |
2262 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2263 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2264 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2265 | break; |
2266 | default: | |
2267 | res = -EINVAL; | |
2268 | } | |
2269 | ||
0c3141e9 AS |
2270 | release_sock(sk); |
2271 | ||
b97bf3fd PL |
2272 | return res; |
2273 | } | |
2274 | ||
2275 | /** | |
247f0f3c | 2276 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2277 | * @sock: socket structure |
2278 | * @lvl: option level | |
2279 | * @opt: option identifier | |
2280 | * @ov: receptacle for option value | |
2281 | * @ol: receptacle for length of option value | |
c4307285 YH |
2282 | * |
2283 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2284 | * (to ease compatibility). |
c4307285 | 2285 | * |
b97bf3fd PL |
2286 | * Returns 0 on success, errno otherwise |
2287 | */ | |
247f0f3c YX |
2288 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2289 | char __user *ov, int __user *ol) | |
b97bf3fd | 2290 | { |
0c3141e9 | 2291 | struct sock *sk = sock->sk; |
58ed9442 JPM |
2292 | struct tipc_sock *tsk = tipc_sk(sk); |
2293 | struct tipc_port *port = &tsk->port; | |
c4307285 | 2294 | int len; |
b97bf3fd | 2295 | u32 value; |
c4307285 | 2296 | int res; |
b97bf3fd | 2297 | |
c4307285 YH |
2298 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2299 | return put_user(0, ol); | |
b97bf3fd PL |
2300 | if (lvl != SOL_TIPC) |
2301 | return -ENOPROTOOPT; | |
2db9983a AS |
2302 | res = get_user(len, ol); |
2303 | if (res) | |
c4307285 | 2304 | return res; |
b97bf3fd | 2305 | |
0c3141e9 | 2306 | lock_sock(sk); |
b97bf3fd PL |
2307 | |
2308 | switch (opt) { | |
2309 | case TIPC_IMPORTANCE: | |
58ed9442 | 2310 | value = tipc_port_importance(port); |
b97bf3fd PL |
2311 | break; |
2312 | case TIPC_SRC_DROPPABLE: | |
58ed9442 | 2313 | value = tipc_port_unreliable(port); |
b97bf3fd PL |
2314 | break; |
2315 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 2316 | value = tipc_port_unreturnable(port); |
b97bf3fd PL |
2317 | break; |
2318 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2319 | value = tipc_sk(sk)->conn_timeout; |
0c3141e9 | 2320 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2321 | break; |
0e65967e | 2322 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2323 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2324 | break; |
0e65967e | 2325 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2326 | value = skb_queue_len(&sk->sk_receive_queue); |
2327 | break; | |
b97bf3fd PL |
2328 | default: |
2329 | res = -EINVAL; | |
2330 | } | |
2331 | ||
0c3141e9 AS |
2332 | release_sock(sk); |
2333 | ||
25860c3b PG |
2334 | if (res) |
2335 | return res; /* "get" failed */ | |
b97bf3fd | 2336 | |
25860c3b PG |
2337 | if (len < sizeof(value)) |
2338 | return -EINVAL; | |
2339 | ||
2340 | if (copy_to_user(ov, &value, sizeof(value))) | |
2341 | return -EFAULT; | |
2342 | ||
2343 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2344 | } |
2345 | ||
52f50ce5 | 2346 | static int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg) |
78acb1f9 EH |
2347 | { |
2348 | struct tipc_sioc_ln_req lnr; | |
2349 | void __user *argp = (void __user *)arg; | |
2350 | ||
2351 | switch (cmd) { | |
2352 | case SIOCGETLINKNAME: | |
2353 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2354 | return -EFAULT; | |
2355 | if (!tipc_node_get_linkname(lnr.bearer_id, lnr.peer, | |
2356 | lnr.linkname, TIPC_MAX_LINK_NAME)) { | |
2357 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2358 | return -EFAULT; | |
2359 | return 0; | |
2360 | } | |
2361 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2362 | default: |
2363 | return -ENOIOCTLCMD; | |
2364 | } | |
2365 | } | |
2366 | ||
ae86b9e3 BH |
2367 | /* Protocol switches for the various types of TIPC sockets */ |
2368 | ||
bca65eae | 2369 | static const struct proto_ops msg_ops = { |
0e65967e | 2370 | .owner = THIS_MODULE, |
b97bf3fd | 2371 | .family = AF_TIPC, |
247f0f3c YX |
2372 | .release = tipc_release, |
2373 | .bind = tipc_bind, | |
2374 | .connect = tipc_connect, | |
5eee6a6d | 2375 | .socketpair = sock_no_socketpair, |
245f3d34 | 2376 | .accept = sock_no_accept, |
247f0f3c YX |
2377 | .getname = tipc_getname, |
2378 | .poll = tipc_poll, | |
78acb1f9 | 2379 | .ioctl = tipc_ioctl, |
245f3d34 | 2380 | .listen = sock_no_listen, |
247f0f3c YX |
2381 | .shutdown = tipc_shutdown, |
2382 | .setsockopt = tipc_setsockopt, | |
2383 | .getsockopt = tipc_getsockopt, | |
2384 | .sendmsg = tipc_sendmsg, | |
2385 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2386 | .mmap = sock_no_mmap, |
2387 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2388 | }; |
2389 | ||
bca65eae | 2390 | static const struct proto_ops packet_ops = { |
0e65967e | 2391 | .owner = THIS_MODULE, |
b97bf3fd | 2392 | .family = AF_TIPC, |
247f0f3c YX |
2393 | .release = tipc_release, |
2394 | .bind = tipc_bind, | |
2395 | .connect = tipc_connect, | |
5eee6a6d | 2396 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2397 | .accept = tipc_accept, |
2398 | .getname = tipc_getname, | |
2399 | .poll = tipc_poll, | |
78acb1f9 | 2400 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2401 | .listen = tipc_listen, |
2402 | .shutdown = tipc_shutdown, | |
2403 | .setsockopt = tipc_setsockopt, | |
2404 | .getsockopt = tipc_getsockopt, | |
2405 | .sendmsg = tipc_send_packet, | |
2406 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2407 | .mmap = sock_no_mmap, |
2408 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2409 | }; |
2410 | ||
bca65eae | 2411 | static const struct proto_ops stream_ops = { |
0e65967e | 2412 | .owner = THIS_MODULE, |
b97bf3fd | 2413 | .family = AF_TIPC, |
247f0f3c YX |
2414 | .release = tipc_release, |
2415 | .bind = tipc_bind, | |
2416 | .connect = tipc_connect, | |
5eee6a6d | 2417 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2418 | .accept = tipc_accept, |
2419 | .getname = tipc_getname, | |
2420 | .poll = tipc_poll, | |
78acb1f9 | 2421 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2422 | .listen = tipc_listen, |
2423 | .shutdown = tipc_shutdown, | |
2424 | .setsockopt = tipc_setsockopt, | |
2425 | .getsockopt = tipc_getsockopt, | |
2426 | .sendmsg = tipc_send_stream, | |
2427 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2428 | .mmap = sock_no_mmap, |
2429 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2430 | }; |
2431 | ||
bca65eae | 2432 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2433 | .owner = THIS_MODULE, |
b97bf3fd | 2434 | .family = AF_TIPC, |
c5fa7b3c | 2435 | .create = tipc_sk_create |
b97bf3fd PL |
2436 | }; |
2437 | ||
2438 | static struct proto tipc_proto = { | |
2439 | .name = "TIPC", | |
2440 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2441 | .obj_size = sizeof(struct tipc_sock), |
2442 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2443 | }; |
2444 | ||
c5fa7b3c YX |
2445 | static struct proto tipc_proto_kern = { |
2446 | .name = "TIPC", | |
2447 | .obj_size = sizeof(struct tipc_sock), | |
2448 | .sysctl_rmem = sysctl_tipc_rmem | |
2449 | }; | |
2450 | ||
b97bf3fd | 2451 | /** |
4323add6 | 2452 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2453 | * |
b97bf3fd PL |
2454 | * Returns 0 on success, errno otherwise |
2455 | */ | |
4323add6 | 2456 | int tipc_socket_init(void) |
b97bf3fd PL |
2457 | { |
2458 | int res; | |
2459 | ||
c4307285 | 2460 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2461 | if (res) { |
2cf8aa19 | 2462 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2463 | goto out; |
2464 | } | |
2465 | ||
2466 | res = sock_register(&tipc_family_ops); | |
2467 | if (res) { | |
2cf8aa19 | 2468 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2469 | proto_unregister(&tipc_proto); |
2470 | goto out; | |
2471 | } | |
b97bf3fd PL |
2472 | out: |
2473 | return res; | |
2474 | } | |
2475 | ||
2476 | /** | |
4323add6 | 2477 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2478 | */ |
4323add6 | 2479 | void tipc_socket_stop(void) |
b97bf3fd | 2480 | { |
b97bf3fd PL |
2481 | sock_unregister(tipc_family_ops.family); |
2482 | proto_unregister(&tipc_proto); | |
2483 | } |