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 | ||
07f6c4bc YX |
37 | #include <linux/rhashtable.h> |
38 | #include <linux/jhash.h> | |
b97bf3fd | 39 | #include "core.h" |
e2dafe87 | 40 | #include "name_table.h" |
78acb1f9 | 41 | #include "node.h" |
e2dafe87 | 42 | #include "link.h" |
5a9ee0be | 43 | #include "config.h" |
2e84c60b | 44 | #include "socket.h" |
2cf8aa19 | 45 | |
07f6c4bc YX |
46 | #define SS_LISTENING -1 /* socket is listening */ |
47 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 48 | |
07f6c4bc | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 50 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
51 | #define TIPC_FWD_MSG 1 |
52 | #define TIPC_CONN_OK 0 | |
53 | #define TIPC_CONN_PROBING 1 | |
54 | #define TIPC_MAX_PORT 0xffffffff | |
55 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
56 | |
57 | /** | |
58 | * struct tipc_sock - TIPC socket structure | |
59 | * @sk: socket - interacts with 'port' and with user via the socket API | |
60 | * @connected: non-zero if port is currently connected to a peer port | |
61 | * @conn_type: TIPC type used when connection was established | |
62 | * @conn_instance: TIPC instance used when connection was established | |
63 | * @published: non-zero if port has one or more associated names | |
64 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 65 | * @portid: unique port identity in TIPC socket hash table |
301bae56 JPM |
66 | * @phdr: preformatted message header used when sending messages |
67 | * @port_list: adjacent ports in TIPC's global list of ports | |
68 | * @publications: list of publications for port | |
69 | * @pub_count: total # of publications port has made during its lifetime | |
70 | * @probing_state: | |
2f55c437 | 71 | * @probing_intv: |
301bae56 JPM |
72 | * @conn_timeout: the time we can wait for an unresponded setup request |
73 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
74 | * @link_cong: non-zero if owner must sleep because of link congestion | |
75 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
76 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
07f6c4bc YX |
77 | * @node: hash table node |
78 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
79 | */ |
80 | struct tipc_sock { | |
81 | struct sock sk; | |
82 | int connected; | |
83 | u32 conn_type; | |
84 | u32 conn_instance; | |
85 | int published; | |
86 | u32 max_pkt; | |
07f6c4bc | 87 | u32 portid; |
301bae56 JPM |
88 | struct tipc_msg phdr; |
89 | struct list_head sock_list; | |
90 | struct list_head publications; | |
91 | u32 pub_count; | |
92 | u32 probing_state; | |
2f55c437 | 93 | unsigned long probing_intv; |
301bae56 JPM |
94 | uint conn_timeout; |
95 | atomic_t dupl_rcvcnt; | |
96 | bool link_cong; | |
97 | uint sent_unacked; | |
98 | uint rcv_unacked; | |
07f6c4bc YX |
99 | struct rhash_head node; |
100 | struct rcu_head rcu; | |
301bae56 | 101 | }; |
b97bf3fd | 102 | |
4f4482dc | 103 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 104 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 105 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
106 | static int tipc_release(struct socket *sock); |
107 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 108 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 109 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 110 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 111 | struct tipc_name_seq const *seq); |
301bae56 | 112 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 113 | struct tipc_name_seq const *seq); |
e05b31f4 | 114 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
115 | static int tipc_sk_insert(struct tipc_sock *tsk); |
116 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
b97bf3fd | 117 | |
bca65eae FW |
118 | static const struct proto_ops packet_ops; |
119 | static const struct proto_ops stream_ops; | |
120 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
121 | |
122 | static struct proto tipc_proto; | |
c5fa7b3c | 123 | static struct proto tipc_proto_kern; |
b97bf3fd | 124 | |
1a1a143d RA |
125 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
126 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
127 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
128 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
129 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
130 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
131 | }; | |
132 | ||
c4307285 | 133 | /* |
0c3141e9 AS |
134 | * Revised TIPC socket locking policy: |
135 | * | |
136 | * Most socket operations take the standard socket lock when they start | |
137 | * and hold it until they finish (or until they need to sleep). Acquiring | |
138 | * this lock grants the owner exclusive access to the fields of the socket | |
139 | * data structures, with the exception of the backlog queue. A few socket | |
140 | * operations can be done without taking the socket lock because they only | |
141 | * read socket information that never changes during the life of the socket. | |
142 | * | |
143 | * Socket operations may acquire the lock for the associated TIPC port if they | |
144 | * need to perform an operation on the port. If any routine needs to acquire | |
145 | * both the socket lock and the port lock it must take the socket lock first | |
146 | * to avoid the risk of deadlock. | |
147 | * | |
148 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
149 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
150 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
151 | * and either handles the message itself or adds it to the socket's backlog | |
152 | * queue; in the latter case the queued message is processed once the process | |
153 | * owning the socket lock releases it. | |
154 | * | |
155 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
156 | * the problem of a blocked socket operation preventing any other operations | |
157 | * from occurring. However, applications must be careful if they have | |
158 | * multiple threads trying to send (or receive) on the same socket, as these | |
159 | * operations might interfere with each other. For example, doing a connect | |
160 | * and a receive at the same time might allow the receive to consume the | |
161 | * ACK message meant for the connect. While additional work could be done | |
162 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
163 | * | |
164 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
165 | * that another operation that must be performed in a non-blocking manner is | |
166 | * not delayed for very long because the lock has already been taken. | |
167 | * | |
168 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
169 | * constant over its lifetime; such fields can be examined without taking | |
170 | * the socket lock and/or port lock, and do not need to be re-read even | |
171 | * after resuming processing after waiting. These fields include: | |
172 | * - socket type | |
173 | * - pointer to socket sk structure (aka tipc_sock structure) | |
174 | * - pointer to port structure | |
175 | * - port reference | |
176 | */ | |
177 | ||
c5898636 JPM |
178 | static u32 tsk_own_node(struct tipc_sock *tsk) |
179 | { | |
180 | return msg_prevnode(&tsk->phdr); | |
181 | } | |
182 | ||
301bae56 | 183 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 184 | { |
301bae56 | 185 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
186 | } |
187 | ||
301bae56 | 188 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 189 | { |
301bae56 | 190 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
191 | } |
192 | ||
301bae56 | 193 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 194 | { |
301bae56 | 195 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
196 | } |
197 | ||
301bae56 | 198 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 199 | { |
301bae56 | 200 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
201 | } |
202 | ||
301bae56 | 203 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 204 | { |
301bae56 | 205 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
206 | } |
207 | ||
301bae56 | 208 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 209 | { |
301bae56 | 210 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
211 | } |
212 | ||
301bae56 | 213 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 214 | { |
301bae56 | 215 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
216 | } |
217 | ||
301bae56 | 218 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
219 | { |
220 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
221 | return -EINVAL; | |
301bae56 | 222 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
223 | return 0; |
224 | } | |
8826cde6 | 225 | |
301bae56 JPM |
226 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
227 | { | |
228 | return container_of(sk, struct tipc_sock, sk); | |
229 | } | |
230 | ||
231 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
232 | { | |
233 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
234 | } | |
235 | ||
0c3141e9 | 236 | /** |
2e84c60b | 237 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
238 | * |
239 | * Caller must hold socket lock | |
b97bf3fd | 240 | */ |
2e84c60b | 241 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 242 | { |
5f6d9123 | 243 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
244 | } |
245 | ||
b97bf3fd | 246 | /** |
2e84c60b | 247 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
248 | * |
249 | * Caller must hold socket lock | |
b97bf3fd | 250 | */ |
2e84c60b | 251 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 252 | { |
a6ca1094 | 253 | struct sk_buff *skb; |
8db1bae3 | 254 | u32 dnode; |
c5898636 | 255 | u32 own_node = tsk_own_node(tipc_sk(sk)); |
0c3141e9 | 256 | |
a6ca1094 | 257 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
c5898636 JPM |
258 | if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT)) |
259 | tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0); | |
8db1bae3 | 260 | } |
b97bf3fd PL |
261 | } |
262 | ||
2e84c60b | 263 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
264 | * |
265 | * Handles cases where the node's network address has changed from | |
266 | * the default of <0.0.0> to its configured setting. | |
267 | */ | |
2e84c60b | 268 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 269 | { |
34747539 | 270 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 271 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
272 | u32 orig_node; |
273 | u32 peer_node; | |
274 | ||
301bae56 | 275 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
276 | return false; |
277 | ||
278 | if (unlikely(msg_origport(msg) != peer_port)) | |
279 | return false; | |
280 | ||
281 | orig_node = msg_orignode(msg); | |
301bae56 | 282 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
283 | |
284 | if (likely(orig_node == peer_node)) | |
285 | return true; | |
286 | ||
34747539 | 287 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
288 | return true; |
289 | ||
34747539 | 290 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
291 | return true; |
292 | ||
293 | return false; | |
294 | } | |
295 | ||
b97bf3fd | 296 | /** |
c5fa7b3c | 297 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 298 | * @net: network namespace (must be default network) |
b97bf3fd PL |
299 | * @sock: pre-allocated socket structure |
300 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 301 | * @kern: caused by kernel or by userspace? |
c4307285 | 302 | * |
0c3141e9 AS |
303 | * This routine creates additional data structures used by the TIPC socket, |
304 | * initializes them, and links them together. | |
b97bf3fd PL |
305 | * |
306 | * Returns 0 on success, errno otherwise | |
307 | */ | |
58ed9442 JPM |
308 | static int tipc_sk_create(struct net *net, struct socket *sock, |
309 | int protocol, int kern) | |
b97bf3fd | 310 | { |
c5898636 | 311 | struct tipc_net *tn; |
0c3141e9 AS |
312 | const struct proto_ops *ops; |
313 | socket_state state; | |
b97bf3fd | 314 | struct sock *sk; |
58ed9442 | 315 | struct tipc_sock *tsk; |
5b8fa7ce | 316 | struct tipc_msg *msg; |
0c3141e9 AS |
317 | |
318 | /* Validate arguments */ | |
b97bf3fd PL |
319 | if (unlikely(protocol != 0)) |
320 | return -EPROTONOSUPPORT; | |
321 | ||
b97bf3fd PL |
322 | switch (sock->type) { |
323 | case SOCK_STREAM: | |
0c3141e9 AS |
324 | ops = &stream_ops; |
325 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
326 | break; |
327 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
328 | ops = &packet_ops; |
329 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
330 | break; |
331 | case SOCK_DGRAM: | |
b97bf3fd | 332 | case SOCK_RDM: |
0c3141e9 AS |
333 | ops = &msg_ops; |
334 | state = SS_READY; | |
b97bf3fd | 335 | break; |
49978651 | 336 | default: |
49978651 | 337 | return -EPROTOTYPE; |
b97bf3fd PL |
338 | } |
339 | ||
0c3141e9 | 340 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
341 | if (!kern) |
342 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
343 | else | |
344 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
345 | ||
0c3141e9 | 346 | if (sk == NULL) |
b97bf3fd | 347 | return -ENOMEM; |
b97bf3fd | 348 | |
58ed9442 | 349 | tsk = tipc_sk(sk); |
301bae56 | 350 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
351 | INIT_LIST_HEAD(&tsk->publications); |
352 | msg = &tsk->phdr; | |
c5898636 JPM |
353 | tn = net_generic(sock_net(sk), tipc_net_id); |
354 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 355 | NAMED_H_SIZE, 0); |
b97bf3fd | 356 | |
0c3141e9 | 357 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
358 | sock->ops = ops; |
359 | sock->state = state; | |
0c3141e9 | 360 | sock_init_data(sock, sk); |
07f6c4bc YX |
361 | if (tipc_sk_insert(tsk)) { |
362 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
363 | return -EINVAL; | |
364 | } | |
365 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 366 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 367 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 368 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
369 | sk->sk_data_ready = tipc_data_ready; |
370 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 371 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 372 | tsk->sent_unacked = 0; |
4f4482dc | 373 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 374 | |
0c3141e9 | 375 | if (sock->state == SS_READY) { |
301bae56 | 376 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 377 | if (sock->type == SOCK_DGRAM) |
301bae56 | 378 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 379 | } |
b97bf3fd PL |
380 | return 0; |
381 | } | |
382 | ||
c5fa7b3c YX |
383 | /** |
384 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
385 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
386 | * | |
387 | * We cannot use sock_creat_kern here because it bumps module user count. | |
388 | * Since socket owner and creator is the same module we must make sure | |
389 | * that module count remains zero for module local sockets, otherwise | |
390 | * we cannot do rmmod. | |
391 | * | |
392 | * Returns 0 on success, errno otherwise | |
393 | */ | |
a62fbcce | 394 | int tipc_sock_create_local(struct net *net, int type, struct socket **res) |
c5fa7b3c YX |
395 | { |
396 | int rc; | |
c5fa7b3c YX |
397 | |
398 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
399 | if (rc < 0) { | |
400 | pr_err("Failed to create kernel socket\n"); | |
401 | return rc; | |
402 | } | |
a62fbcce | 403 | tipc_sk_create(net, *res, 0, 1); |
c5fa7b3c | 404 | |
c5fa7b3c YX |
405 | return 0; |
406 | } | |
407 | ||
408 | /** | |
409 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
410 | * @sock: the socket to be released. | |
411 | * | |
412 | * Module reference count is not incremented when such sockets are created, | |
413 | * so we must keep it from being decremented when they are released. | |
414 | */ | |
415 | void tipc_sock_release_local(struct socket *sock) | |
416 | { | |
247f0f3c | 417 | tipc_release(sock); |
c5fa7b3c YX |
418 | sock->ops = NULL; |
419 | sock_release(sock); | |
420 | } | |
421 | ||
422 | /** | |
423 | * tipc_sock_accept_local - accept a connection on a socket created | |
424 | * with tipc_sock_create_local. Use this function to avoid that | |
425 | * module reference count is inadvertently incremented. | |
426 | * | |
427 | * @sock: the accepting socket | |
428 | * @newsock: reference to the new socket to be created | |
429 | * @flags: socket flags | |
430 | */ | |
431 | ||
432 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 433 | int flags) |
c5fa7b3c YX |
434 | { |
435 | struct sock *sk = sock->sk; | |
436 | int ret; | |
437 | ||
438 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
439 | sk->sk_protocol, newsock); | |
440 | if (ret < 0) | |
441 | return ret; | |
442 | ||
247f0f3c | 443 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
444 | if (ret < 0) { |
445 | sock_release(*newsock); | |
446 | return ret; | |
447 | } | |
448 | (*newsock)->ops = sock->ops; | |
449 | return ret; | |
450 | } | |
451 | ||
07f6c4bc YX |
452 | static void tipc_sk_callback(struct rcu_head *head) |
453 | { | |
454 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
455 | ||
456 | sock_put(&tsk->sk); | |
457 | } | |
458 | ||
b97bf3fd | 459 | /** |
247f0f3c | 460 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
461 | * @sock: socket to destroy |
462 | * | |
463 | * This routine cleans up any messages that are still queued on the socket. | |
464 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
465 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
466 | * and any others are discarded. (If the first message on a STREAM socket | |
467 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 468 | * |
b97bf3fd PL |
469 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
470 | * are returned or discarded according to the "destination droppable" setting | |
471 | * specified for the message by the sender. | |
472 | * | |
473 | * Returns 0 on success, errno otherwise | |
474 | */ | |
247f0f3c | 475 | static int tipc_release(struct socket *sock) |
b97bf3fd | 476 | { |
b97bf3fd | 477 | struct sock *sk = sock->sk; |
357c4774 | 478 | struct net *net; |
58ed9442 | 479 | struct tipc_sock *tsk; |
a6ca1094 | 480 | struct sk_buff *skb; |
f2f2a96a | 481 | u32 dnode, probing_state; |
b97bf3fd | 482 | |
0c3141e9 AS |
483 | /* |
484 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
485 | * releases a pre-allocated child socket that was never used) | |
486 | */ | |
0c3141e9 | 487 | if (sk == NULL) |
b97bf3fd | 488 | return 0; |
c4307285 | 489 | |
357c4774 | 490 | net = sock_net(sk); |
58ed9442 | 491 | tsk = tipc_sk(sk); |
0c3141e9 AS |
492 | lock_sock(sk); |
493 | ||
494 | /* | |
495 | * Reject all unreceived messages, except on an active connection | |
496 | * (which disconnects locally & sends a 'FIN+' to peer) | |
497 | */ | |
301bae56 | 498 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 499 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
500 | skb = __skb_dequeue(&sk->sk_receive_queue); |
501 | if (skb == NULL) | |
b97bf3fd | 502 | break; |
a6ca1094 YX |
503 | if (TIPC_SKB_CB(skb)->handle != NULL) |
504 | kfree_skb(skb); | |
0c3141e9 AS |
505 | else { |
506 | if ((sock->state == SS_CONNECTING) || | |
507 | (sock->state == SS_CONNECTED)) { | |
508 | sock->state = SS_DISCONNECTING; | |
301bae56 | 509 | tsk->connected = 0; |
f2f9800d | 510 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 511 | } |
c5898636 | 512 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 513 | TIPC_ERR_NO_PORT)) |
f2f9800d | 514 | tipc_link_xmit_skb(net, skb, dnode, 0); |
0c3141e9 | 515 | } |
b97bf3fd PL |
516 | } |
517 | ||
301bae56 | 518 | tipc_sk_withdraw(tsk, 0, NULL); |
f2f2a96a | 519 | probing_state = tsk->probing_state; |
3721e9c7 YX |
520 | if (del_timer_sync(&sk->sk_timer) && |
521 | probing_state != TIPC_CONN_PROBING) | |
f2f2a96a | 522 | sock_put(sk); |
07f6c4bc | 523 | tipc_sk_remove(tsk); |
301bae56 | 524 | if (tsk->connected) { |
c5898636 | 525 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 526 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 527 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 528 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 529 | if (skb) |
f2f9800d YX |
530 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
531 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
5b8fa7ce | 532 | } |
b97bf3fd | 533 | |
0c3141e9 | 534 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 535 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 536 | |
0c3141e9 | 537 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
538 | sock->state = SS_DISCONNECTING; |
539 | release_sock(sk); | |
07f6c4bc YX |
540 | |
541 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 542 | sock->sk = NULL; |
b97bf3fd | 543 | |
065d7e39 | 544 | return 0; |
b97bf3fd PL |
545 | } |
546 | ||
547 | /** | |
247f0f3c | 548 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
549 | * @sock: socket structure |
550 | * @uaddr: socket address describing name(s) and desired operation | |
551 | * @uaddr_len: size of socket address data structure | |
c4307285 | 552 | * |
b97bf3fd PL |
553 | * Name and name sequence binding is indicated using a positive scope value; |
554 | * a negative scope value unbinds the specified name. Specifying no name | |
555 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 556 | * |
b97bf3fd | 557 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
558 | * |
559 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
560 | * access any non-constant socket information. | |
b97bf3fd | 561 | */ |
247f0f3c YX |
562 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
563 | int uaddr_len) | |
b97bf3fd | 564 | { |
84602761 | 565 | struct sock *sk = sock->sk; |
b97bf3fd | 566 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 567 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 568 | int res = -EINVAL; |
b97bf3fd | 569 | |
84602761 YX |
570 | lock_sock(sk); |
571 | if (unlikely(!uaddr_len)) { | |
301bae56 | 572 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
573 | goto exit; |
574 | } | |
c4307285 | 575 | |
84602761 YX |
576 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
577 | res = -EINVAL; | |
578 | goto exit; | |
579 | } | |
580 | if (addr->family != AF_TIPC) { | |
581 | res = -EAFNOSUPPORT; | |
582 | goto exit; | |
583 | } | |
b97bf3fd | 584 | |
b97bf3fd PL |
585 | if (addr->addrtype == TIPC_ADDR_NAME) |
586 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
587 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
588 | res = -EAFNOSUPPORT; | |
589 | goto exit; | |
590 | } | |
c4307285 | 591 | |
13a2e898 | 592 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 593 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
594 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
595 | res = -EACCES; | |
596 | goto exit; | |
597 | } | |
c422f1bd | 598 | |
84602761 | 599 | res = (addr->scope > 0) ? |
301bae56 JPM |
600 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
601 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
602 | exit: |
603 | release_sock(sk); | |
604 | return res; | |
b97bf3fd PL |
605 | } |
606 | ||
c4307285 | 607 | /** |
247f0f3c | 608 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
609 | * @sock: socket structure |
610 | * @uaddr: area for returned socket address | |
611 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 612 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 613 | * |
b97bf3fd | 614 | * Returns 0 on success, errno otherwise |
0c3141e9 | 615 | * |
2da59918 AS |
616 | * NOTE: This routine doesn't need to take the socket lock since it only |
617 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 618 | * a completely predictable manner). |
b97bf3fd | 619 | */ |
247f0f3c YX |
620 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
621 | int *uaddr_len, int peer) | |
b97bf3fd | 622 | { |
b97bf3fd | 623 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 624 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 625 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 626 | |
88f8a5e3 | 627 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 628 | if (peer) { |
2da59918 AS |
629 | if ((sock->state != SS_CONNECTED) && |
630 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
631 | return -ENOTCONN; | |
301bae56 JPM |
632 | addr->addr.id.ref = tsk_peer_port(tsk); |
633 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 634 | } else { |
07f6c4bc | 635 | addr->addr.id.ref = tsk->portid; |
34747539 | 636 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 637 | } |
b97bf3fd PL |
638 | |
639 | *uaddr_len = sizeof(*addr); | |
640 | addr->addrtype = TIPC_ADDR_ID; | |
641 | addr->family = AF_TIPC; | |
642 | addr->scope = 0; | |
b97bf3fd PL |
643 | addr->addr.name.domain = 0; |
644 | ||
0c3141e9 | 645 | return 0; |
b97bf3fd PL |
646 | } |
647 | ||
648 | /** | |
247f0f3c | 649 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
650 | * @file: file structure associated with the socket |
651 | * @sock: socket for which to calculate the poll bits | |
652 | * @wait: ??? | |
653 | * | |
9b674e82 AS |
654 | * Returns pollmask value |
655 | * | |
656 | * COMMENTARY: | |
657 | * It appears that the usual socket locking mechanisms are not useful here | |
658 | * since the pollmask info is potentially out-of-date the moment this routine | |
659 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
660 | * to handle any preventable race conditions, so TIPC will do the same ... | |
661 | * | |
662 | * TIPC sets the returned events as follows: | |
f662c070 AS |
663 | * |
664 | * socket state flags set | |
665 | * ------------ --------- | |
666 | * unconnected no read flags | |
c4fc298a | 667 | * POLLOUT if port is not congested |
f662c070 AS |
668 | * |
669 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
670 | * no write flags | |
671 | * | |
672 | * connected POLLIN/POLLRDNORM if data in rx queue | |
673 | * POLLOUT if port is not congested | |
674 | * | |
675 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
676 | * no write flags | |
677 | * | |
678 | * listening POLLIN if SYN in rx queue | |
679 | * no write flags | |
680 | * | |
681 | * ready POLLIN/POLLRDNORM if data in rx queue | |
682 | * [connectionless] POLLOUT (since port cannot be congested) | |
683 | * | |
684 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
685 | * imply that the operation will succeed, merely that it should be performed | |
686 | * and will not block. | |
b97bf3fd | 687 | */ |
247f0f3c YX |
688 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
689 | poll_table *wait) | |
b97bf3fd | 690 | { |
9b674e82 | 691 | struct sock *sk = sock->sk; |
58ed9442 | 692 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 693 | u32 mask = 0; |
9b674e82 | 694 | |
f288bef4 | 695 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 696 | |
f662c070 | 697 | switch ((int)sock->state) { |
c4fc298a | 698 | case SS_UNCONNECTED: |
60120526 | 699 | if (!tsk->link_cong) |
c4fc298a EH |
700 | mask |= POLLOUT; |
701 | break; | |
f662c070 AS |
702 | case SS_READY: |
703 | case SS_CONNECTED: | |
301bae56 | 704 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
705 | mask |= POLLOUT; |
706 | /* fall thru' */ | |
707 | case SS_CONNECTING: | |
708 | case SS_LISTENING: | |
709 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
710 | mask |= (POLLIN | POLLRDNORM); | |
711 | break; | |
712 | case SS_DISCONNECTING: | |
713 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
714 | break; | |
715 | } | |
9b674e82 AS |
716 | |
717 | return mask; | |
b97bf3fd PL |
718 | } |
719 | ||
0abd8ff2 JPM |
720 | /** |
721 | * tipc_sendmcast - send multicast message | |
722 | * @sock: socket structure | |
723 | * @seq: destination address | |
562640f3 | 724 | * @msg: message to send |
0abd8ff2 JPM |
725 | * @dsz: total length of message data |
726 | * @timeo: timeout to wait for wakeup | |
727 | * | |
728 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
729 | * Returns the number of bytes sent on success, or errno | |
730 | */ | |
731 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 732 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
733 | { |
734 | struct sock *sk = sock->sk; | |
c5898636 | 735 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 736 | struct net *net = sock_net(sk); |
c5898636 | 737 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 738 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
f25dcc76 | 739 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
740 | uint mtu; |
741 | int rc; | |
742 | ||
743 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
744 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
745 | msg_set_destport(mhdr, 0); | |
746 | msg_set_destnode(mhdr, 0); | |
747 | msg_set_nametype(mhdr, seq->type); | |
748 | msg_set_namelower(mhdr, seq->lower); | |
749 | msg_set_nameupper(mhdr, seq->upper); | |
750 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
751 | ||
752 | new_mtu: | |
753 | mtu = tipc_bclink_get_mtu(); | |
94153e36 | 754 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
0abd8ff2 JPM |
755 | if (unlikely(rc < 0)) |
756 | return rc; | |
757 | ||
758 | do { | |
94153e36 | 759 | rc = tipc_bclink_xmit(net, pktchain); |
0abd8ff2 JPM |
760 | if (likely(rc >= 0)) { |
761 | rc = dsz; | |
762 | break; | |
763 | } | |
f25dcc76 AV |
764 | if (rc == -EMSGSIZE) { |
765 | msg->msg_iter = save; | |
0abd8ff2 | 766 | goto new_mtu; |
f25dcc76 | 767 | } |
0abd8ff2 JPM |
768 | if (rc != -ELINKCONG) |
769 | break; | |
50100a5e | 770 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
771 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
772 | if (rc) | |
94153e36 | 773 | __skb_queue_purge(pktchain); |
0abd8ff2 JPM |
774 | } while (!rc); |
775 | return rc; | |
776 | } | |
777 | ||
078bec82 JPM |
778 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
779 | */ | |
f2f9800d | 780 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff *buf) |
078bec82 JPM |
781 | { |
782 | struct tipc_msg *msg = buf_msg(buf); | |
783 | struct tipc_port_list dports = {0, NULL, }; | |
784 | struct tipc_port_list *item; | |
785 | struct sk_buff *b; | |
786 | uint i, last, dst = 0; | |
787 | u32 scope = TIPC_CLUSTER_SCOPE; | |
788 | ||
34747539 | 789 | if (in_own_node(net, msg_orignode(msg))) |
078bec82 JPM |
790 | scope = TIPC_NODE_SCOPE; |
791 | ||
792 | /* Create destination port list: */ | |
4ac1c8d0 YX |
793 | tipc_nametbl_mc_translate(net, msg_nametype(msg), msg_namelower(msg), |
794 | msg_nameupper(msg), scope, &dports); | |
078bec82 JPM |
795 | last = dports.count; |
796 | if (!last) { | |
797 | kfree_skb(buf); | |
798 | return; | |
799 | } | |
800 | ||
801 | for (item = &dports; item; item = item->next) { | |
802 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { | |
803 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; | |
804 | if (!b) { | |
805 | pr_warn("Failed do clone mcast rcv buffer\n"); | |
806 | continue; | |
807 | } | |
808 | msg_set_destport(msg, item->ports[i]); | |
f2f9800d | 809 | tipc_sk_rcv(net, b); |
078bec82 JPM |
810 | } |
811 | } | |
812 | tipc_port_list_free(&dports); | |
813 | } | |
814 | ||
ac0074ee JPM |
815 | /** |
816 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
817 | * @tsk: receiving socket | |
1186adf7 | 818 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed. |
ac0074ee | 819 | */ |
1186adf7 | 820 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb) |
ac0074ee | 821 | { |
1186adf7 | 822 | struct tipc_msg *msg = buf_msg(*skb); |
60120526 | 823 | int conn_cong; |
1186adf7 JPM |
824 | u32 dnode; |
825 | u32 own_node = tsk_own_node(tsk); | |
ac0074ee | 826 | /* Ignore if connection cannot be validated: */ |
2e84c60b | 827 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
828 | goto exit; |
829 | ||
301bae56 | 830 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
831 | |
832 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 833 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
834 | tsk->sent_unacked -= msg_msgcnt(msg); |
835 | if (conn_cong) | |
50100a5e | 836 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee | 837 | } else if (msg_type(msg) == CONN_PROBE) { |
1186adf7 JPM |
838 | if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) { |
839 | msg_set_type(msg, CONN_PROBE_REPLY); | |
840 | return; | |
841 | } | |
ac0074ee JPM |
842 | } |
843 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
844 | exit: | |
1186adf7 JPM |
845 | kfree_skb(*skb); |
846 | *skb = NULL; | |
ac0074ee JPM |
847 | } |
848 | ||
3f40504f YX |
849 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
850 | { | |
851 | struct sock *sk = sock->sk; | |
58ed9442 | 852 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
853 | DEFINE_WAIT(wait); |
854 | int done; | |
855 | ||
856 | do { | |
857 | int err = sock_error(sk); | |
858 | if (err) | |
859 | return err; | |
860 | if (sock->state == SS_DISCONNECTING) | |
861 | return -EPIPE; | |
862 | if (!*timeo_p) | |
863 | return -EAGAIN; | |
864 | if (signal_pending(current)) | |
865 | return sock_intr_errno(*timeo_p); | |
866 | ||
867 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 868 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
869 | finish_wait(sk_sleep(sk), &wait); |
870 | } while (!done); | |
871 | return 0; | |
872 | } | |
873 | ||
b97bf3fd | 874 | /** |
247f0f3c | 875 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 876 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
877 | * @sock: socket structure |
878 | * @m: message to send | |
e2dafe87 | 879 | * @dsz: amount of user data to be sent |
c4307285 | 880 | * |
b97bf3fd | 881 | * Message must have an destination specified explicitly. |
c4307285 | 882 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
883 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
884 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 885 | * |
b97bf3fd PL |
886 | * Returns the number of bytes sent on success, or errno otherwise |
887 | */ | |
247f0f3c | 888 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
e2dafe87 | 889 | struct msghdr *m, size_t dsz) |
b97bf3fd | 890 | { |
e2dafe87 | 891 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 892 | struct sock *sk = sock->sk; |
58ed9442 | 893 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 894 | struct net *net = sock_net(sk); |
301bae56 | 895 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 896 | u32 dnode, dport; |
94153e36 | 897 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
a6ca1094 | 898 | struct sk_buff *skb; |
e2dafe87 | 899 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
f25dcc76 | 900 | struct iov_iter save; |
e2dafe87 | 901 | u32 mtu; |
3f40504f | 902 | long timeo; |
88b17b6a | 903 | int rc; |
b97bf3fd PL |
904 | |
905 | if (unlikely(!dest)) | |
906 | return -EDESTADDRREQ; | |
e2dafe87 | 907 | |
51f9cc1f AS |
908 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
909 | (dest->family != AF_TIPC))) | |
b97bf3fd | 910 | return -EINVAL; |
e2dafe87 JPM |
911 | |
912 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 913 | return -EMSGSIZE; |
b97bf3fd | 914 | |
0c3141e9 AS |
915 | if (iocb) |
916 | lock_sock(sk); | |
917 | ||
e2dafe87 | 918 | if (unlikely(sock->state != SS_READY)) { |
0c3141e9 | 919 | if (sock->state == SS_LISTENING) { |
e2dafe87 | 920 | rc = -EPIPE; |
0c3141e9 AS |
921 | goto exit; |
922 | } | |
923 | if (sock->state != SS_UNCONNECTED) { | |
e2dafe87 | 924 | rc = -EISCONN; |
0c3141e9 AS |
925 | goto exit; |
926 | } | |
301bae56 | 927 | if (tsk->published) { |
e2dafe87 | 928 | rc = -EOPNOTSUPP; |
0c3141e9 AS |
929 | goto exit; |
930 | } | |
3388007b | 931 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
932 | tsk->conn_type = dest->addr.name.name.type; |
933 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 934 | } |
b97bf3fd PL |
935 | } |
936 | ||
3f40504f | 937 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
938 | |
939 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
562640f3 | 940 | rc = tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
941 | goto exit; |
942 | } else if (dest->addrtype == TIPC_ADDR_NAME) { | |
943 | u32 type = dest->addr.name.name.type; | |
944 | u32 inst = dest->addr.name.name.instance; | |
945 | u32 domain = dest->addr.name.domain; | |
946 | ||
947 | dnode = domain; | |
948 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
949 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
950 | msg_set_nametype(mhdr, type); | |
951 | msg_set_nameinst(mhdr, inst); | |
952 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 953 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
954 | msg_set_destnode(mhdr, dnode); |
955 | msg_set_destport(mhdr, dport); | |
956 | if (unlikely(!dport && !dnode)) { | |
957 | rc = -EHOSTUNREACH; | |
958 | goto exit; | |
c4307285 | 959 | } |
e2dafe87 JPM |
960 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
961 | dnode = dest->addr.id.node; | |
962 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
963 | msg_set_lookup_scope(mhdr, 0); | |
964 | msg_set_destnode(mhdr, dnode); | |
965 | msg_set_destport(mhdr, dest->addr.id.ref); | |
966 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
967 | } | |
968 | ||
f25dcc76 | 969 | save = m->msg_iter; |
e2dafe87 | 970 | new_mtu: |
f2f9800d | 971 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
94153e36 | 972 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
e2dafe87 JPM |
973 | if (rc < 0) |
974 | goto exit; | |
975 | ||
976 | do { | |
94153e36 | 977 | skb = skb_peek(pktchain); |
a6ca1094 | 978 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
94153e36 | 979 | rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid); |
e2dafe87 JPM |
980 | if (likely(rc >= 0)) { |
981 | if (sock->state != SS_READY) | |
0c3141e9 | 982 | sock->state = SS_CONNECTING; |
e2dafe87 | 983 | rc = dsz; |
0c3141e9 | 984 | break; |
c4307285 | 985 | } |
f25dcc76 AV |
986 | if (rc == -EMSGSIZE) { |
987 | m->msg_iter = save; | |
e2dafe87 | 988 | goto new_mtu; |
f25dcc76 | 989 | } |
e2dafe87 | 990 | if (rc != -ELINKCONG) |
0c3141e9 | 991 | break; |
50100a5e | 992 | tsk->link_cong = 1; |
e2dafe87 | 993 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 994 | if (rc) |
94153e36 | 995 | __skb_queue_purge(pktchain); |
e2dafe87 | 996 | } while (!rc); |
0c3141e9 AS |
997 | exit: |
998 | if (iocb) | |
999 | release_sock(sk); | |
e2dafe87 JPM |
1000 | |
1001 | return rc; | |
b97bf3fd PL |
1002 | } |
1003 | ||
391a6dd1 YX |
1004 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
1005 | { | |
1006 | struct sock *sk = sock->sk; | |
58ed9442 | 1007 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
1008 | DEFINE_WAIT(wait); |
1009 | int done; | |
1010 | ||
1011 | do { | |
1012 | int err = sock_error(sk); | |
1013 | if (err) | |
1014 | return err; | |
1015 | if (sock->state == SS_DISCONNECTING) | |
1016 | return -EPIPE; | |
1017 | else if (sock->state != SS_CONNECTED) | |
1018 | return -ENOTCONN; | |
1019 | if (!*timeo_p) | |
1020 | return -EAGAIN; | |
1021 | if (signal_pending(current)) | |
1022 | return sock_intr_errno(*timeo_p); | |
1023 | ||
1024 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1025 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 1026 | (!tsk->link_cong && |
301bae56 JPM |
1027 | !tsk_conn_cong(tsk)) || |
1028 | !tsk->connected); | |
391a6dd1 YX |
1029 | finish_wait(sk_sleep(sk), &wait); |
1030 | } while (!done); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
c4307285 | 1034 | /** |
4ccfe5e0 JPM |
1035 | * tipc_send_stream - send stream-oriented data |
1036 | * @iocb: (unused) | |
b97bf3fd | 1037 | * @sock: socket structure |
4ccfe5e0 JPM |
1038 | * @m: data to send |
1039 | * @dsz: total length of data to be transmitted | |
c4307285 | 1040 | * |
4ccfe5e0 | 1041 | * Used for SOCK_STREAM data. |
c4307285 | 1042 | * |
4ccfe5e0 JPM |
1043 | * Returns the number of bytes sent on success (or partial success), |
1044 | * or errno if no data sent | |
b97bf3fd | 1045 | */ |
4ccfe5e0 JPM |
1046 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
1047 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1048 | { |
0c3141e9 | 1049 | struct sock *sk = sock->sk; |
f2f9800d | 1050 | struct net *net = sock_net(sk); |
58ed9442 | 1051 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1052 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 1053 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
342dfc30 | 1054 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1055 | u32 portid = tsk->portid; |
4ccfe5e0 | 1056 | int rc = -EINVAL; |
391a6dd1 | 1057 | long timeo; |
4ccfe5e0 JPM |
1058 | u32 dnode; |
1059 | uint mtu, send, sent = 0; | |
f25dcc76 | 1060 | struct iov_iter save; |
b97bf3fd PL |
1061 | |
1062 | /* Handle implied connection establishment */ | |
4ccfe5e0 JPM |
1063 | if (unlikely(dest)) { |
1064 | rc = tipc_sendmsg(iocb, sock, m, dsz); | |
1065 | if (dsz && (dsz == rc)) | |
60120526 | 1066 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1067 | return rc; |
1068 | } | |
1069 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1070 | return -EMSGSIZE; |
1071 | ||
0c3141e9 AS |
1072 | if (iocb) |
1073 | lock_sock(sk); | |
b97bf3fd | 1074 | |
391a6dd1 YX |
1075 | if (unlikely(sock->state != SS_CONNECTED)) { |
1076 | if (sock->state == SS_DISCONNECTING) | |
4ccfe5e0 | 1077 | rc = -EPIPE; |
391a6dd1 | 1078 | else |
4ccfe5e0 | 1079 | rc = -ENOTCONN; |
391a6dd1 YX |
1080 | goto exit; |
1081 | } | |
1d835874 | 1082 | |
391a6dd1 | 1083 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1084 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1085 | |
1086 | next: | |
f25dcc76 | 1087 | save = m->msg_iter; |
301bae56 | 1088 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1089 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
94153e36 | 1090 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
4ccfe5e0 JPM |
1091 | if (unlikely(rc < 0)) |
1092 | goto exit; | |
c4307285 | 1093 | do { |
301bae56 | 1094 | if (likely(!tsk_conn_cong(tsk))) { |
94153e36 | 1095 | rc = tipc_link_xmit(net, pktchain, dnode, portid); |
4ccfe5e0 | 1096 | if (likely(!rc)) { |
60120526 | 1097 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1098 | sent += send; |
1099 | if (sent == dsz) | |
1100 | break; | |
1101 | goto next; | |
1102 | } | |
1103 | if (rc == -EMSGSIZE) { | |
f2f9800d YX |
1104 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1105 | portid); | |
f25dcc76 | 1106 | m->msg_iter = save; |
4ccfe5e0 JPM |
1107 | goto next; |
1108 | } | |
1109 | if (rc != -ELINKCONG) | |
1110 | break; | |
50100a5e | 1111 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1112 | } |
1113 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1114 | if (rc) |
94153e36 | 1115 | __skb_queue_purge(pktchain); |
4ccfe5e0 | 1116 | } while (!rc); |
391a6dd1 | 1117 | exit: |
0c3141e9 AS |
1118 | if (iocb) |
1119 | release_sock(sk); | |
4ccfe5e0 | 1120 | return sent ? sent : rc; |
b97bf3fd PL |
1121 | } |
1122 | ||
c4307285 | 1123 | /** |
4ccfe5e0 JPM |
1124 | * tipc_send_packet - send a connection-oriented message |
1125 | * @iocb: if NULL, indicates that socket lock is already held | |
b97bf3fd | 1126 | * @sock: socket structure |
4ccfe5e0 JPM |
1127 | * @m: message to send |
1128 | * @dsz: length of data to be transmitted | |
c4307285 | 1129 | * |
4ccfe5e0 | 1130 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1131 | * |
4ccfe5e0 | 1132 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1133 | */ |
4ccfe5e0 JPM |
1134 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
1135 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1136 | { |
4ccfe5e0 JPM |
1137 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1138 | return -EMSGSIZE; | |
b97bf3fd | 1139 | |
4ccfe5e0 | 1140 | return tipc_send_stream(iocb, sock, m, dsz); |
b97bf3fd PL |
1141 | } |
1142 | ||
dadebc00 | 1143 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1144 | */ |
301bae56 | 1145 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1146 | u32 peer_node) |
b97bf3fd | 1147 | { |
3721e9c7 YX |
1148 | struct sock *sk = &tsk->sk; |
1149 | struct net *net = sock_net(sk); | |
301bae56 | 1150 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1151 | |
dadebc00 JPM |
1152 | msg_set_destnode(msg, peer_node); |
1153 | msg_set_destport(msg, peer_port); | |
1154 | msg_set_type(msg, TIPC_CONN_MSG); | |
1155 | msg_set_lookup_scope(msg, 0); | |
1156 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1157 | |
2f55c437 | 1158 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1159 | tsk->probing_state = TIPC_CONN_OK; |
1160 | tsk->connected = 1; | |
3721e9c7 | 1161 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1162 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1163 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1164 | } |
1165 | ||
1166 | /** | |
1167 | * set_orig_addr - capture sender's address for received message | |
1168 | * @m: descriptor for message info | |
1169 | * @msg: received message header | |
c4307285 | 1170 | * |
b97bf3fd PL |
1171 | * Note: Address is not captured if not requested by receiver. |
1172 | */ | |
05790c64 | 1173 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1174 | { |
342dfc30 | 1175 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1176 | |
c4307285 | 1177 | if (addr) { |
b97bf3fd PL |
1178 | addr->family = AF_TIPC; |
1179 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1180 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1181 | addr->addr.id.ref = msg_origport(msg); |
1182 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1183 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1184 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1185 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1186 | } | |
1187 | } | |
1188 | ||
1189 | /** | |
301bae56 | 1190 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1191 | * @m: descriptor for message info |
1192 | * @msg: received message header | |
301bae56 | 1193 | * @tsk: TIPC port associated with message |
c4307285 | 1194 | * |
b97bf3fd | 1195 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1196 | * |
b97bf3fd PL |
1197 | * Returns 0 if successful, otherwise errno |
1198 | */ | |
301bae56 JPM |
1199 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1200 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1201 | { |
1202 | u32 anc_data[3]; | |
1203 | u32 err; | |
1204 | u32 dest_type; | |
3546c750 | 1205 | int has_name; |
b97bf3fd PL |
1206 | int res; |
1207 | ||
1208 | if (likely(m->msg_controllen == 0)) | |
1209 | return 0; | |
1210 | ||
1211 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1212 | err = msg ? msg_errcode(msg) : 0; |
1213 | if (unlikely(err)) { | |
1214 | anc_data[0] = err; | |
1215 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1216 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1217 | if (res) | |
b97bf3fd | 1218 | return res; |
2db9983a AS |
1219 | if (anc_data[1]) { |
1220 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1221 | msg_data(msg)); | |
1222 | if (res) | |
1223 | return res; | |
1224 | } | |
b97bf3fd PL |
1225 | } |
1226 | ||
1227 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1228 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1229 | switch (dest_type) { | |
1230 | case TIPC_NAMED_MSG: | |
3546c750 | 1231 | has_name = 1; |
b97bf3fd PL |
1232 | anc_data[0] = msg_nametype(msg); |
1233 | anc_data[1] = msg_namelower(msg); | |
1234 | anc_data[2] = msg_namelower(msg); | |
1235 | break; | |
1236 | case TIPC_MCAST_MSG: | |
3546c750 | 1237 | has_name = 1; |
b97bf3fd PL |
1238 | anc_data[0] = msg_nametype(msg); |
1239 | anc_data[1] = msg_namelower(msg); | |
1240 | anc_data[2] = msg_nameupper(msg); | |
1241 | break; | |
1242 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1243 | has_name = (tsk->conn_type != 0); |
1244 | anc_data[0] = tsk->conn_type; | |
1245 | anc_data[1] = tsk->conn_instance; | |
1246 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1247 | break; |
1248 | default: | |
3546c750 | 1249 | has_name = 0; |
b97bf3fd | 1250 | } |
2db9983a AS |
1251 | if (has_name) { |
1252 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1253 | if (res) | |
1254 | return res; | |
1255 | } | |
b97bf3fd PL |
1256 | |
1257 | return 0; | |
1258 | } | |
1259 | ||
301bae56 | 1260 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1261 | { |
f2f9800d | 1262 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1263 | struct sk_buff *skb = NULL; |
739f5e4e | 1264 | struct tipc_msg *msg; |
301bae56 JPM |
1265 | u32 peer_port = tsk_peer_port(tsk); |
1266 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1267 | |
301bae56 | 1268 | if (!tsk->connected) |
739f5e4e | 1269 | return; |
c5898636 JPM |
1270 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1271 | dnode, tsk_own_node(tsk), peer_port, | |
1272 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1273 | if (!skb) |
739f5e4e | 1274 | return; |
a6ca1094 | 1275 | msg = buf_msg(skb); |
739f5e4e | 1276 | msg_set_msgcnt(msg, ack); |
f2f9800d | 1277 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1278 | } |
1279 | ||
85d3fc94 | 1280 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1281 | { |
1282 | struct sock *sk = sock->sk; | |
1283 | DEFINE_WAIT(wait); | |
85d3fc94 | 1284 | long timeo = *timeop; |
9bbb4ecc YX |
1285 | int err; |
1286 | ||
1287 | for (;;) { | |
1288 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1289 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1290 | if (sock->state == SS_DISCONNECTING) { |
1291 | err = -ENOTCONN; | |
1292 | break; | |
1293 | } | |
1294 | release_sock(sk); | |
1295 | timeo = schedule_timeout(timeo); | |
1296 | lock_sock(sk); | |
1297 | } | |
1298 | err = 0; | |
1299 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1300 | break; | |
1301 | err = sock_intr_errno(timeo); | |
1302 | if (signal_pending(current)) | |
1303 | break; | |
1304 | err = -EAGAIN; | |
1305 | if (!timeo) | |
1306 | break; | |
1307 | } | |
1308 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1309 | *timeop = timeo; |
9bbb4ecc YX |
1310 | return err; |
1311 | } | |
1312 | ||
c4307285 | 1313 | /** |
247f0f3c | 1314 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1315 | * @iocb: (unused) |
1316 | * @m: descriptor for message info | |
1317 | * @buf_len: total size of user buffer area | |
1318 | * @flags: receive flags | |
c4307285 | 1319 | * |
b97bf3fd PL |
1320 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1321 | * If the complete message doesn't fit in user area, truncate it. | |
1322 | * | |
1323 | * Returns size of returned message data, errno otherwise | |
1324 | */ | |
247f0f3c YX |
1325 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1326 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1327 | { |
0c3141e9 | 1328 | struct sock *sk = sock->sk; |
58ed9442 | 1329 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1330 | struct sk_buff *buf; |
1331 | struct tipc_msg *msg; | |
9bbb4ecc | 1332 | long timeo; |
b97bf3fd PL |
1333 | unsigned int sz; |
1334 | u32 err; | |
1335 | int res; | |
1336 | ||
0c3141e9 | 1337 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1338 | if (unlikely(!buf_len)) |
1339 | return -EINVAL; | |
1340 | ||
0c3141e9 | 1341 | lock_sock(sk); |
b97bf3fd | 1342 | |
0c3141e9 AS |
1343 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1344 | res = -ENOTCONN; | |
b97bf3fd PL |
1345 | goto exit; |
1346 | } | |
1347 | ||
9bbb4ecc | 1348 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1349 | restart: |
b97bf3fd | 1350 | |
0c3141e9 | 1351 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1352 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1353 | if (res) |
1354 | goto exit; | |
b97bf3fd | 1355 | |
0c3141e9 | 1356 | /* Look at first message in receive queue */ |
0c3141e9 | 1357 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1358 | msg = buf_msg(buf); |
1359 | sz = msg_data_sz(msg); | |
1360 | err = msg_errcode(msg); | |
1361 | ||
b97bf3fd | 1362 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1363 | if ((!sz) && (!err)) { |
2e84c60b | 1364 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1365 | goto restart; |
1366 | } | |
1367 | ||
1368 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1369 | set_orig_addr(m, msg); |
1370 | ||
1371 | /* Capture ancillary data (optional) */ | |
301bae56 | 1372 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1373 | if (res) |
b97bf3fd PL |
1374 | goto exit; |
1375 | ||
1376 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1377 | if (!err) { |
1378 | if (unlikely(buf_len < sz)) { | |
1379 | sz = buf_len; | |
1380 | m->msg_flags |= MSG_TRUNC; | |
1381 | } | |
51f3d02b | 1382 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1383 | if (res) |
b97bf3fd | 1384 | goto exit; |
b97bf3fd PL |
1385 | res = sz; |
1386 | } else { | |
1387 | if ((sock->state == SS_READY) || | |
1388 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1389 | res = 0; | |
1390 | else | |
1391 | res = -ECONNRESET; | |
1392 | } | |
1393 | ||
1394 | /* Consume received message (optional) */ | |
b97bf3fd | 1395 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1396 | if ((sock->state != SS_READY) && |
60120526 | 1397 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1398 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1399 | tsk->rcv_unacked = 0; |
1400 | } | |
2e84c60b | 1401 | tsk_advance_rx_queue(sk); |
c4307285 | 1402 | } |
b97bf3fd | 1403 | exit: |
0c3141e9 | 1404 | release_sock(sk); |
b97bf3fd PL |
1405 | return res; |
1406 | } | |
1407 | ||
c4307285 | 1408 | /** |
247f0f3c | 1409 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1410 | * @iocb: (unused) |
1411 | * @m: descriptor for message info | |
1412 | * @buf_len: total size of user buffer area | |
1413 | * @flags: receive flags | |
c4307285 YH |
1414 | * |
1415 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1416 | * will optionally wait for more; never truncates data. |
1417 | * | |
1418 | * Returns size of returned message data, errno otherwise | |
1419 | */ | |
247f0f3c YX |
1420 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1421 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1422 | { |
0c3141e9 | 1423 | struct sock *sk = sock->sk; |
58ed9442 | 1424 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1425 | struct sk_buff *buf; |
1426 | struct tipc_msg *msg; | |
9bbb4ecc | 1427 | long timeo; |
b97bf3fd | 1428 | unsigned int sz; |
3720d40b | 1429 | int sz_to_copy, target, needed; |
b97bf3fd | 1430 | int sz_copied = 0; |
b97bf3fd | 1431 | u32 err; |
0c3141e9 | 1432 | int res = 0; |
b97bf3fd | 1433 | |
0c3141e9 | 1434 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1435 | if (unlikely(!buf_len)) |
1436 | return -EINVAL; | |
1437 | ||
0c3141e9 | 1438 | lock_sock(sk); |
b97bf3fd | 1439 | |
9bbb4ecc | 1440 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1441 | res = -ENOTCONN; |
b97bf3fd PL |
1442 | goto exit; |
1443 | } | |
1444 | ||
3720d40b | 1445 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1446 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1447 | |
617d3c7a | 1448 | restart: |
0c3141e9 | 1449 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1450 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1451 | if (res) |
1452 | goto exit; | |
b97bf3fd | 1453 | |
0c3141e9 | 1454 | /* Look at first message in receive queue */ |
0c3141e9 | 1455 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1456 | msg = buf_msg(buf); |
1457 | sz = msg_data_sz(msg); | |
1458 | err = msg_errcode(msg); | |
1459 | ||
1460 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1461 | if ((!sz) && (!err)) { |
2e84c60b | 1462 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1463 | goto restart; |
1464 | } | |
1465 | ||
1466 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1467 | if (sz_copied == 0) { |
1468 | set_orig_addr(m, msg); | |
301bae56 | 1469 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1470 | if (res) |
b97bf3fd PL |
1471 | goto exit; |
1472 | } | |
1473 | ||
1474 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1475 | if (!err) { |
0232fd0a | 1476 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1477 | |
0232fd0a | 1478 | sz -= offset; |
b97bf3fd PL |
1479 | needed = (buf_len - sz_copied); |
1480 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1481 | |
51f3d02b DM |
1482 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1483 | m, sz_to_copy); | |
0232fd0a | 1484 | if (res) |
b97bf3fd | 1485 | goto exit; |
0232fd0a | 1486 | |
b97bf3fd PL |
1487 | sz_copied += sz_to_copy; |
1488 | ||
1489 | if (sz_to_copy < sz) { | |
1490 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1491 | TIPC_SKB_CB(buf)->handle = |
1492 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1493 | goto exit; |
1494 | } | |
b97bf3fd PL |
1495 | } else { |
1496 | if (sz_copied != 0) | |
1497 | goto exit; /* can't add error msg to valid data */ | |
1498 | ||
1499 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1500 | res = 0; | |
1501 | else | |
1502 | res = -ECONNRESET; | |
1503 | } | |
1504 | ||
1505 | /* Consume received message (optional) */ | |
b97bf3fd | 1506 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1507 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1508 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1509 | tsk->rcv_unacked = 0; |
1510 | } | |
2e84c60b | 1511 | tsk_advance_rx_queue(sk); |
c4307285 | 1512 | } |
b97bf3fd PL |
1513 | |
1514 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1515 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1516 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1517 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1518 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1519 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1520 | goto restart; |
1521 | ||
1522 | exit: | |
0c3141e9 | 1523 | release_sock(sk); |
a3b0a5a9 | 1524 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1525 | } |
1526 | ||
f288bef4 YX |
1527 | /** |
1528 | * tipc_write_space - wake up thread if port congestion is released | |
1529 | * @sk: socket | |
1530 | */ | |
1531 | static void tipc_write_space(struct sock *sk) | |
1532 | { | |
1533 | struct socket_wq *wq; | |
1534 | ||
1535 | rcu_read_lock(); | |
1536 | wq = rcu_dereference(sk->sk_wq); | |
1537 | if (wq_has_sleeper(wq)) | |
1538 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1539 | POLLWRNORM | POLLWRBAND); | |
1540 | rcu_read_unlock(); | |
1541 | } | |
1542 | ||
1543 | /** | |
1544 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1545 | * @sk: socket | |
1546 | * @len: the length of messages | |
1547 | */ | |
676d2369 | 1548 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1549 | { |
1550 | struct socket_wq *wq; | |
1551 | ||
1552 | rcu_read_lock(); | |
1553 | wq = rcu_dereference(sk->sk_wq); | |
1554 | if (wq_has_sleeper(wq)) | |
1555 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1556 | POLLRDNORM | POLLRDBAND); | |
1557 | rcu_read_unlock(); | |
1558 | } | |
1559 | ||
7e6c131e YX |
1560 | /** |
1561 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1562 | * @tsk: TIPC socket |
1186adf7 | 1563 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1564 | * |
b2ad5e5f | 1565 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1566 | */ |
1186adf7 | 1567 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb) |
7e6c131e | 1568 | { |
58ed9442 | 1569 | struct sock *sk = &tsk->sk; |
f2f9800d | 1570 | struct net *net = sock_net(sk); |
8826cde6 | 1571 | struct socket *sock = sk->sk_socket; |
1186adf7 | 1572 | struct tipc_msg *msg = buf_msg(*skb); |
e4de5fab | 1573 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1574 | |
1575 | if (msg_mcast(msg)) | |
1576 | return retval; | |
1577 | ||
1578 | switch ((int)sock->state) { | |
1579 | case SS_CONNECTED: | |
1580 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1581 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1582 | if (unlikely(msg_errcode(msg))) { |
1583 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1584 | tsk->connected = 0; |
dadebc00 | 1585 | /* let timer expire on it's own */ |
f2f9800d | 1586 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
07f6c4bc | 1587 | tsk->portid); |
7e6c131e YX |
1588 | } |
1589 | retval = TIPC_OK; | |
1590 | } | |
1591 | break; | |
1592 | case SS_CONNECTING: | |
1593 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1594 | |
1595 | if (unlikely(!msg_connected(msg))) | |
1596 | break; | |
1597 | ||
584d24b3 YX |
1598 | if (unlikely(msg_errcode(msg))) { |
1599 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1600 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1601 | retval = TIPC_OK; |
1602 | break; | |
1603 | } | |
1604 | ||
dadebc00 | 1605 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1606 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1607 | sk->sk_err = EINVAL; |
7e6c131e | 1608 | retval = TIPC_OK; |
584d24b3 YX |
1609 | break; |
1610 | } | |
1611 | ||
301bae56 JPM |
1612 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1613 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1614 | sock->state = SS_CONNECTED; |
1615 | ||
584d24b3 YX |
1616 | /* If an incoming message is an 'ACK-', it should be |
1617 | * discarded here because it doesn't contain useful | |
1618 | * data. In addition, we should try to wake up | |
1619 | * connect() routine if sleeping. | |
1620 | */ | |
1621 | if (msg_data_sz(msg) == 0) { | |
1186adf7 JPM |
1622 | kfree_skb(*skb); |
1623 | *skb = NULL; | |
584d24b3 YX |
1624 | if (waitqueue_active(sk_sleep(sk))) |
1625 | wake_up_interruptible(sk_sleep(sk)); | |
1626 | } | |
1627 | retval = TIPC_OK; | |
7e6c131e YX |
1628 | break; |
1629 | case SS_LISTENING: | |
1630 | case SS_UNCONNECTED: | |
1631 | /* Accept only SYN message */ | |
1632 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1633 | retval = TIPC_OK; | |
1634 | break; | |
1635 | case SS_DISCONNECTING: | |
1636 | break; | |
1637 | default: | |
1638 | pr_err("Unknown socket state %u\n", sock->state); | |
1639 | } | |
1640 | return retval; | |
1641 | } | |
1642 | ||
aba79f33 YX |
1643 | /** |
1644 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1645 | * @sk: socket | |
1646 | * @buf: message | |
1647 | * | |
1648 | * For all connection oriented messages, irrespective of importance, | |
1649 | * the default overload value (i.e. 67MB) is set as limit. | |
1650 | * | |
1651 | * For all connectionless messages, by default new queue limits are | |
1652 | * as belows: | |
1653 | * | |
cc79dd1b YX |
1654 | * TIPC_LOW_IMPORTANCE (4 MB) |
1655 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1656 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1657 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1658 | * |
1659 | * Returns overload limit according to corresponding message importance | |
1660 | */ | |
1661 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1662 | { | |
1663 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1664 | |
1665 | if (msg_connected(msg)) | |
0cee6bbe | 1666 | return sysctl_tipc_rmem[2]; |
1667 | ||
1668 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1669 | msg_importance(msg); | |
aba79f33 YX |
1670 | } |
1671 | ||
c4307285 | 1672 | /** |
0c3141e9 AS |
1673 | * filter_rcv - validate incoming message |
1674 | * @sk: socket | |
1186adf7 | 1675 | * @skb: pointer to message. Set to NULL if buffer is consumed. |
c4307285 | 1676 | * |
0c3141e9 AS |
1677 | * Enqueues message on receive queue if acceptable; optionally handles |
1678 | * disconnect indication for a connected socket. | |
1679 | * | |
1186adf7 | 1680 | * Called with socket lock already taken |
c4307285 | 1681 | * |
1186adf7 | 1682 | * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected |
b97bf3fd | 1683 | */ |
1186adf7 | 1684 | static int filter_rcv(struct sock *sk, struct sk_buff **skb) |
b97bf3fd | 1685 | { |
0c3141e9 | 1686 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1687 | struct tipc_sock *tsk = tipc_sk(sk); |
1186adf7 JPM |
1688 | struct tipc_msg *msg = buf_msg(*skb); |
1689 | unsigned int limit = rcvbuf_limit(sk, *skb); | |
e4de5fab | 1690 | int rc = TIPC_OK; |
b97bf3fd | 1691 | |
1186adf7 JPM |
1692 | if (unlikely(msg_user(msg) == CONN_MANAGER)) { |
1693 | tipc_sk_proto_rcv(tsk, skb); | |
1694 | return TIPC_OK; | |
1695 | } | |
ec8a2e56 | 1696 | |
50100a5e | 1697 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1186adf7 | 1698 | kfree_skb(*skb); |
50100a5e JPM |
1699 | tsk->link_cong = 0; |
1700 | sk->sk_write_space(sk); | |
1186adf7 | 1701 | *skb = NULL; |
50100a5e JPM |
1702 | return TIPC_OK; |
1703 | } | |
1704 | ||
b97bf3fd | 1705 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1706 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1707 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1708 | |
b97bf3fd | 1709 | if (sock->state == SS_READY) { |
b29f1428 | 1710 | if (msg_connected(msg)) |
e4de5fab | 1711 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1712 | } else { |
1186adf7 JPM |
1713 | rc = filter_connect(tsk, skb); |
1714 | if (rc != TIPC_OK || !*skb) | |
e4de5fab | 1715 | return rc; |
b97bf3fd PL |
1716 | } |
1717 | ||
1718 | /* Reject message if there isn't room to queue it */ | |
1186adf7 | 1719 | if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit) |
e4de5fab | 1720 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1721 | |
aba79f33 | 1722 | /* Enqueue message */ |
1186adf7 JPM |
1723 | TIPC_SKB_CB(*skb)->handle = NULL; |
1724 | __skb_queue_tail(&sk->sk_receive_queue, *skb); | |
1725 | skb_set_owner_r(*skb, sk); | |
0c3141e9 | 1726 | |
676d2369 | 1727 | sk->sk_data_ready(sk); |
1186adf7 | 1728 | *skb = NULL; |
0c3141e9 AS |
1729 | return TIPC_OK; |
1730 | } | |
b97bf3fd | 1731 | |
0c3141e9 | 1732 | /** |
4f4482dc | 1733 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1734 | * @sk: socket |
a6ca1094 | 1735 | * @skb: message |
0c3141e9 | 1736 | * |
e3a77561 | 1737 | * Caller must hold socket lock |
0c3141e9 AS |
1738 | * |
1739 | * Returns 0 | |
1740 | */ | |
a6ca1094 | 1741 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1742 | { |
1186adf7 JPM |
1743 | int err; |
1744 | atomic_t *dcnt; | |
1745 | u32 dnode; | |
4f4482dc | 1746 | struct tipc_sock *tsk = tipc_sk(sk); |
34747539 | 1747 | struct net *net = sock_net(sk); |
a6ca1094 | 1748 | uint truesize = skb->truesize; |
0c3141e9 | 1749 | |
1186adf7 JPM |
1750 | err = filter_rcv(sk, &skb); |
1751 | if (likely(!skb)) { | |
1752 | dcnt = &tsk->dupl_rcvcnt; | |
1753 | if (atomic_read(dcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1754 | atomic_add(truesize, dcnt); | |
ac0074ee JPM |
1755 | return 0; |
1756 | } | |
1186adf7 JPM |
1757 | if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err)) |
1758 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); | |
0c3141e9 AS |
1759 | return 0; |
1760 | } | |
1761 | ||
d570d864 JPM |
1762 | /** |
1763 | * tipc_sk_enqueue_skb - enqueue buffer to socket or backlog queue | |
1764 | * @sk: socket | |
1765 | * @skb: pointer to message. Set to NULL if buffer is consumed. | |
1766 | * @dnode: if buffer should be forwarded/returned, send to this node | |
1767 | * | |
1768 | * Caller must hold socket lock | |
1769 | * | |
1770 | * Returns TIPC_OK (0) or -tipc error code | |
1771 | */ | |
1772 | static int tipc_sk_enqueue_skb(struct sock *sk, struct sk_buff **skb) | |
1773 | { | |
1774 | unsigned int lim; | |
1775 | atomic_t *dcnt; | |
1776 | ||
1777 | if (unlikely(!*skb)) | |
1778 | return TIPC_OK; | |
1779 | if (!sock_owned_by_user(sk)) | |
1780 | return filter_rcv(sk, skb); | |
1781 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
1782 | if (sk->sk_backlog.len) | |
1783 | atomic_set(dcnt, 0); | |
1784 | lim = rcvbuf_limit(sk, *skb) + atomic_read(dcnt); | |
1785 | if (unlikely(sk_add_backlog(sk, *skb, lim))) | |
1786 | return -TIPC_ERR_OVERLOAD; | |
1787 | *skb = NULL; | |
1788 | return TIPC_OK; | |
1789 | } | |
1790 | ||
0c3141e9 | 1791 | /** |
24be34b5 | 1792 | * tipc_sk_rcv - handle incoming message |
a6ca1094 | 1793 | * @skb: buffer containing arriving message |
9816f061 JPM |
1794 | * Consumes buffer |
1795 | * Returns 0 if success, or errno: -EHOSTUNREACH | |
0c3141e9 | 1796 | */ |
f2f9800d | 1797 | int tipc_sk_rcv(struct net *net, struct sk_buff *skb) |
0c3141e9 | 1798 | { |
9816f061 | 1799 | struct tipc_sock *tsk; |
c5898636 | 1800 | struct tipc_net *tn; |
9816f061 | 1801 | struct sock *sk; |
a6ca1094 | 1802 | u32 dport = msg_destport(buf_msg(skb)); |
e3a77561 | 1803 | int err = -TIPC_ERR_NO_PORT; |
8db1bae3 | 1804 | u32 dnode; |
9816f061 | 1805 | |
e3a77561 | 1806 | /* Find destination */ |
e05b31f4 | 1807 | tsk = tipc_sk_lookup(net, dport); |
e3a77561 JPM |
1808 | if (likely(tsk)) { |
1809 | sk = &tsk->sk; | |
1810 | spin_lock_bh(&sk->sk_lock.slock); | |
1811 | err = tipc_sk_enqueue_skb(sk, &skb); | |
1812 | spin_unlock_bh(&sk->sk_lock.slock); | |
1813 | sock_put(sk); | |
9816f061 | 1814 | } |
e3a77561 JPM |
1815 | if (likely(!skb)) |
1816 | return 0; | |
1817 | if (tipc_msg_lookup_dest(net, skb, &dnode, &err)) | |
1818 | goto xmit; | |
1819 | if (!err) { | |
1820 | dnode = msg_destnode(buf_msg(skb)); | |
1821 | goto xmit; | |
1186adf7 | 1822 | } |
e3a77561 JPM |
1823 | tn = net_generic(net, tipc_net_id); |
1824 | if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err)) | |
1825 | return -EHOSTUNREACH; | |
1826 | xmit: | |
1827 | tipc_link_xmit_skb(net, skb, dnode, dport); | |
1186adf7 | 1828 | return err ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1829 | } |
1830 | ||
78eb3a53 YX |
1831 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1832 | { | |
1833 | struct sock *sk = sock->sk; | |
1834 | DEFINE_WAIT(wait); | |
1835 | int done; | |
1836 | ||
1837 | do { | |
1838 | int err = sock_error(sk); | |
1839 | if (err) | |
1840 | return err; | |
1841 | if (!*timeo_p) | |
1842 | return -ETIMEDOUT; | |
1843 | if (signal_pending(current)) | |
1844 | return sock_intr_errno(*timeo_p); | |
1845 | ||
1846 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1847 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1848 | finish_wait(sk_sleep(sk), &wait); | |
1849 | } while (!done); | |
1850 | return 0; | |
1851 | } | |
1852 | ||
b97bf3fd | 1853 | /** |
247f0f3c | 1854 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1855 | * @sock: socket structure |
1856 | * @dest: socket address for destination port | |
1857 | * @destlen: size of socket address data structure | |
0c3141e9 | 1858 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1859 | * |
1860 | * Returns 0 on success, errno otherwise | |
1861 | */ | |
247f0f3c YX |
1862 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1863 | int destlen, int flags) | |
b97bf3fd | 1864 | { |
0c3141e9 | 1865 | struct sock *sk = sock->sk; |
b89741a0 AS |
1866 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1867 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1868 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1869 | socket_state previous; | |
b89741a0 AS |
1870 | int res; |
1871 | ||
0c3141e9 AS |
1872 | lock_sock(sk); |
1873 | ||
b89741a0 | 1874 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1875 | if (sock->state == SS_READY) { |
1876 | res = -EOPNOTSUPP; | |
1877 | goto exit; | |
1878 | } | |
b89741a0 | 1879 | |
b89741a0 AS |
1880 | /* |
1881 | * Reject connection attempt using multicast address | |
1882 | * | |
1883 | * Note: send_msg() validates the rest of the address fields, | |
1884 | * so there's no need to do it here | |
1885 | */ | |
0c3141e9 AS |
1886 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1887 | res = -EINVAL; | |
1888 | goto exit; | |
1889 | } | |
1890 | ||
78eb3a53 | 1891 | previous = sock->state; |
584d24b3 YX |
1892 | switch (sock->state) { |
1893 | case SS_UNCONNECTED: | |
1894 | /* Send a 'SYN-' to destination */ | |
1895 | m.msg_name = dest; | |
1896 | m.msg_namelen = destlen; | |
1897 | ||
1898 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1899 | * indicate send_msg() is never blocked. | |
1900 | */ | |
1901 | if (!timeout) | |
1902 | m.msg_flags = MSG_DONTWAIT; | |
1903 | ||
247f0f3c | 1904 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1905 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1906 | goto exit; | |
1907 | ||
1908 | /* Just entered SS_CONNECTING state; the only | |
1909 | * difference is that return value in non-blocking | |
1910 | * case is EINPROGRESS, rather than EALREADY. | |
1911 | */ | |
1912 | res = -EINPROGRESS; | |
584d24b3 | 1913 | case SS_CONNECTING: |
78eb3a53 YX |
1914 | if (previous == SS_CONNECTING) |
1915 | res = -EALREADY; | |
1916 | if (!timeout) | |
1917 | goto exit; | |
1918 | timeout = msecs_to_jiffies(timeout); | |
1919 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1920 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1921 | break; |
1922 | case SS_CONNECTED: | |
1923 | res = -EISCONN; | |
1924 | break; | |
1925 | default: | |
1926 | res = -EINVAL; | |
78eb3a53 | 1927 | break; |
b89741a0 | 1928 | } |
0c3141e9 AS |
1929 | exit: |
1930 | release_sock(sk); | |
b89741a0 | 1931 | return res; |
b97bf3fd PL |
1932 | } |
1933 | ||
c4307285 | 1934 | /** |
247f0f3c | 1935 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1936 | * @sock: socket structure |
1937 | * @len: (unused) | |
c4307285 | 1938 | * |
b97bf3fd PL |
1939 | * Returns 0 on success, errno otherwise |
1940 | */ | |
247f0f3c | 1941 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1942 | { |
0c3141e9 AS |
1943 | struct sock *sk = sock->sk; |
1944 | int res; | |
1945 | ||
1946 | lock_sock(sk); | |
b97bf3fd | 1947 | |
245f3d34 | 1948 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1949 | res = -EINVAL; |
1950 | else { | |
1951 | sock->state = SS_LISTENING; | |
1952 | res = 0; | |
1953 | } | |
1954 | ||
1955 | release_sock(sk); | |
1956 | return res; | |
b97bf3fd PL |
1957 | } |
1958 | ||
6398e23c YX |
1959 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1960 | { | |
1961 | struct sock *sk = sock->sk; | |
1962 | DEFINE_WAIT(wait); | |
1963 | int err; | |
1964 | ||
1965 | /* True wake-one mechanism for incoming connections: only | |
1966 | * one process gets woken up, not the 'whole herd'. | |
1967 | * Since we do not 'race & poll' for established sockets | |
1968 | * anymore, the common case will execute the loop only once. | |
1969 | */ | |
1970 | for (;;) { | |
1971 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1972 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1973 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1974 | release_sock(sk); |
1975 | timeo = schedule_timeout(timeo); | |
1976 | lock_sock(sk); | |
1977 | } | |
1978 | err = 0; | |
1979 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1980 | break; | |
1981 | err = -EINVAL; | |
1982 | if (sock->state != SS_LISTENING) | |
1983 | break; | |
1984 | err = sock_intr_errno(timeo); | |
1985 | if (signal_pending(current)) | |
1986 | break; | |
1987 | err = -EAGAIN; | |
1988 | if (!timeo) | |
1989 | break; | |
1990 | } | |
1991 | finish_wait(sk_sleep(sk), &wait); | |
1992 | return err; | |
1993 | } | |
1994 | ||
c4307285 | 1995 | /** |
247f0f3c | 1996 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1997 | * @sock: listening socket |
1998 | * @newsock: new socket that is to be connected | |
1999 | * @flags: file-related flags associated with socket | |
c4307285 | 2000 | * |
b97bf3fd PL |
2001 | * Returns 0 on success, errno otherwise |
2002 | */ | |
247f0f3c | 2003 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2004 | { |
0fef8f20 | 2005 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2006 | struct sk_buff *buf; |
301bae56 | 2007 | struct tipc_sock *new_tsock; |
0fef8f20 | 2008 | struct tipc_msg *msg; |
6398e23c | 2009 | long timeo; |
0c3141e9 | 2010 | int res; |
b97bf3fd | 2011 | |
0c3141e9 | 2012 | lock_sock(sk); |
b97bf3fd | 2013 | |
0c3141e9 AS |
2014 | if (sock->state != SS_LISTENING) { |
2015 | res = -EINVAL; | |
b97bf3fd PL |
2016 | goto exit; |
2017 | } | |
6398e23c YX |
2018 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2019 | res = tipc_wait_for_accept(sock, timeo); | |
2020 | if (res) | |
2021 | goto exit; | |
0c3141e9 AS |
2022 | |
2023 | buf = skb_peek(&sk->sk_receive_queue); | |
2024 | ||
c5fa7b3c | 2025 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2026 | if (res) |
2027 | goto exit; | |
b97bf3fd | 2028 | |
0fef8f20 | 2029 | new_sk = new_sock->sk; |
301bae56 | 2030 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2031 | msg = buf_msg(buf); |
b97bf3fd | 2032 | |
0fef8f20 PG |
2033 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2034 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2035 | ||
2036 | /* | |
2037 | * Reject any stray messages received by new socket | |
2038 | * before the socket lock was taken (very, very unlikely) | |
2039 | */ | |
2e84c60b | 2040 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2041 | |
2042 | /* Connect new socket to it's peer */ | |
301bae56 | 2043 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2044 | new_sock->state = SS_CONNECTED; |
2045 | ||
301bae56 | 2046 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2047 | if (msg_named(msg)) { |
301bae56 JPM |
2048 | new_tsock->conn_type = msg_nametype(msg); |
2049 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2050 | } |
0fef8f20 PG |
2051 | |
2052 | /* | |
2053 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2054 | * Respond to 'SYN+' by queuing it on new socket. | |
2055 | */ | |
2056 | if (!msg_data_sz(msg)) { | |
2057 | struct msghdr m = {NULL,}; | |
2058 | ||
2e84c60b | 2059 | tsk_advance_rx_queue(sk); |
247f0f3c | 2060 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
2061 | } else { |
2062 | __skb_dequeue(&sk->sk_receive_queue); | |
2063 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2064 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2065 | } |
2066 | release_sock(new_sk); | |
b97bf3fd | 2067 | exit: |
0c3141e9 | 2068 | release_sock(sk); |
b97bf3fd PL |
2069 | return res; |
2070 | } | |
2071 | ||
2072 | /** | |
247f0f3c | 2073 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2074 | * @sock: socket structure |
e247a8f5 | 2075 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2076 | * |
2077 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2078 | * |
b97bf3fd PL |
2079 | * Returns 0 on success, errno otherwise |
2080 | */ | |
247f0f3c | 2081 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2082 | { |
0c3141e9 | 2083 | struct sock *sk = sock->sk; |
f2f9800d | 2084 | struct net *net = sock_net(sk); |
58ed9442 | 2085 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2086 | struct sk_buff *skb; |
80e44c22 | 2087 | u32 dnode; |
b97bf3fd PL |
2088 | int res; |
2089 | ||
e247a8f5 AS |
2090 | if (how != SHUT_RDWR) |
2091 | return -EINVAL; | |
b97bf3fd | 2092 | |
0c3141e9 | 2093 | lock_sock(sk); |
b97bf3fd PL |
2094 | |
2095 | switch (sock->state) { | |
0c3141e9 | 2096 | case SS_CONNECTING: |
b97bf3fd PL |
2097 | case SS_CONNECTED: |
2098 | ||
b97bf3fd | 2099 | restart: |
617d3c7a | 2100 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2101 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2102 | if (skb) { | |
2103 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2104 | kfree_skb(skb); | |
b97bf3fd PL |
2105 | goto restart; |
2106 | } | |
c5898636 | 2107 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 2108 | TIPC_CONN_SHUTDOWN)) |
f2f9800d YX |
2109 | tipc_link_xmit_skb(net, skb, dnode, |
2110 | tsk->portid); | |
2111 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
0c3141e9 | 2112 | } else { |
301bae56 | 2113 | dnode = tsk_peer_node(tsk); |
c5898636 JPM |
2114 | |
2115 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
80e44c22 | 2116 | TIPC_CONN_MSG, SHORT_H_SIZE, |
c5898636 | 2117 | 0, dnode, tsk_own_node(tsk), |
301bae56 | 2118 | tsk_peer_port(tsk), |
07f6c4bc | 2119 | tsk->portid, TIPC_CONN_SHUTDOWN); |
f2f9800d | 2120 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2121 | } |
301bae56 | 2122 | tsk->connected = 0; |
0c3141e9 | 2123 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2124 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2125 | /* fall through */ |
2126 | ||
2127 | case SS_DISCONNECTING: | |
2128 | ||
75031151 | 2129 | /* Discard any unreceived messages */ |
57467e56 | 2130 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2131 | |
2132 | /* Wake up anyone sleeping in poll */ | |
2133 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2134 | res = 0; |
2135 | break; | |
2136 | ||
2137 | default: | |
2138 | res = -ENOTCONN; | |
2139 | } | |
2140 | ||
0c3141e9 | 2141 | release_sock(sk); |
b97bf3fd PL |
2142 | return res; |
2143 | } | |
2144 | ||
f2f2a96a | 2145 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2146 | { |
f2f2a96a YX |
2147 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2148 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2149 | struct sk_buff *skb = NULL; |
57289015 | 2150 | u32 peer_port, peer_node; |
c5898636 | 2151 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2152 | |
6c9808ce | 2153 | bh_lock_sock(sk); |
301bae56 | 2154 | if (!tsk->connected) { |
6c9808ce JPM |
2155 | bh_unlock_sock(sk); |
2156 | goto exit; | |
57289015 | 2157 | } |
301bae56 JPM |
2158 | peer_port = tsk_peer_port(tsk); |
2159 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2160 | |
301bae56 | 2161 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
57289015 | 2162 | /* Previous probe not answered -> self abort */ |
c5898636 | 2163 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 2164 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, |
c5898636 | 2165 | own_node, peer_node, tsk->portid, |
34747539 | 2166 | peer_port, TIPC_ERR_NO_PORT); |
57289015 | 2167 | } else { |
c5898636 JPM |
2168 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2169 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2170 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2171 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2172 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2173 | } |
2174 | bh_unlock_sock(sk); | |
a6ca1094 | 2175 | if (skb) |
f2f9800d | 2176 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2177 | exit: |
07f6c4bc | 2178 | sock_put(sk); |
57289015 JPM |
2179 | } |
2180 | ||
301bae56 | 2181 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2182 | struct tipc_name_seq const *seq) |
2183 | { | |
f2f9800d | 2184 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2185 | struct publication *publ; |
2186 | u32 key; | |
2187 | ||
301bae56 | 2188 | if (tsk->connected) |
0fc87aae | 2189 | return -EINVAL; |
07f6c4bc YX |
2190 | key = tsk->portid + tsk->pub_count + 1; |
2191 | if (key == tsk->portid) | |
0fc87aae JPM |
2192 | return -EADDRINUSE; |
2193 | ||
f2f9800d | 2194 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2195 | scope, tsk->portid, key); |
0fc87aae JPM |
2196 | if (unlikely(!publ)) |
2197 | return -EINVAL; | |
2198 | ||
301bae56 JPM |
2199 | list_add(&publ->pport_list, &tsk->publications); |
2200 | tsk->pub_count++; | |
2201 | tsk->published = 1; | |
0fc87aae JPM |
2202 | return 0; |
2203 | } | |
2204 | ||
301bae56 | 2205 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2206 | struct tipc_name_seq const *seq) |
2207 | { | |
f2f9800d | 2208 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2209 | struct publication *publ; |
2210 | struct publication *safe; | |
2211 | int rc = -EINVAL; | |
2212 | ||
301bae56 | 2213 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2214 | if (seq) { |
2215 | if (publ->scope != scope) | |
2216 | continue; | |
2217 | if (publ->type != seq->type) | |
2218 | continue; | |
2219 | if (publ->lower != seq->lower) | |
2220 | continue; | |
2221 | if (publ->upper != seq->upper) | |
2222 | break; | |
f2f9800d | 2223 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2224 | publ->ref, publ->key); |
2225 | rc = 0; | |
2226 | break; | |
2227 | } | |
f2f9800d | 2228 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2229 | publ->ref, publ->key); |
2230 | rc = 0; | |
2231 | } | |
301bae56 JPM |
2232 | if (list_empty(&tsk->publications)) |
2233 | tsk->published = 0; | |
0fc87aae JPM |
2234 | return rc; |
2235 | } | |
2236 | ||
301bae56 | 2237 | static int tipc_sk_show(struct tipc_sock *tsk, char *buf, |
5a9ee0be JPM |
2238 | int len, int full_id) |
2239 | { | |
34747539 YX |
2240 | struct net *net = sock_net(&tsk->sk); |
2241 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
5a9ee0be JPM |
2242 | struct publication *publ; |
2243 | int ret; | |
2244 | ||
2245 | if (full_id) | |
2246 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", | |
34747539 YX |
2247 | tipc_zone(tn->own_addr), |
2248 | tipc_cluster(tn->own_addr), | |
2249 | tipc_node(tn->own_addr), tsk->portid); | |
5a9ee0be | 2250 | else |
07f6c4bc | 2251 | ret = tipc_snprintf(buf, len, "%-10u:", tsk->portid); |
5a9ee0be | 2252 | |
301bae56 JPM |
2253 | if (tsk->connected) { |
2254 | u32 dport = tsk_peer_port(tsk); | |
2255 | u32 destnode = tsk_peer_node(tsk); | |
5a9ee0be JPM |
2256 | |
2257 | ret += tipc_snprintf(buf + ret, len - ret, | |
2258 | " connected to <%u.%u.%u:%u>", | |
2259 | tipc_zone(destnode), | |
2260 | tipc_cluster(destnode), | |
2261 | tipc_node(destnode), dport); | |
301bae56 | 2262 | if (tsk->conn_type != 0) |
5a9ee0be | 2263 | ret += tipc_snprintf(buf + ret, len - ret, |
301bae56 JPM |
2264 | " via {%u,%u}", tsk->conn_type, |
2265 | tsk->conn_instance); | |
2266 | } else if (tsk->published) { | |
5a9ee0be | 2267 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
301bae56 | 2268 | list_for_each_entry(publ, &tsk->publications, pport_list) { |
5a9ee0be JPM |
2269 | if (publ->lower == publ->upper) |
2270 | ret += tipc_snprintf(buf + ret, len - ret, | |
2271 | " {%u,%u}", publ->type, | |
2272 | publ->lower); | |
2273 | else | |
2274 | ret += tipc_snprintf(buf + ret, len - ret, | |
2275 | " {%u,%u,%u}", publ->type, | |
2276 | publ->lower, publ->upper); | |
2277 | } | |
2278 | } | |
2279 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); | |
2280 | return ret; | |
2281 | } | |
2282 | ||
e05b31f4 | 2283 | struct sk_buff *tipc_sk_socks_show(struct net *net) |
5a9ee0be | 2284 | { |
e05b31f4 | 2285 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2286 | const struct bucket_table *tbl; |
2287 | struct rhash_head *pos; | |
5a9ee0be JPM |
2288 | struct sk_buff *buf; |
2289 | struct tlv_desc *rep_tlv; | |
2290 | char *pb; | |
2291 | int pb_len; | |
2292 | struct tipc_sock *tsk; | |
2293 | int str_len = 0; | |
07f6c4bc | 2294 | int i; |
5a9ee0be JPM |
2295 | |
2296 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); | |
2297 | if (!buf) | |
2298 | return NULL; | |
2299 | rep_tlv = (struct tlv_desc *)buf->data; | |
2300 | pb = TLV_DATA(rep_tlv); | |
2301 | pb_len = ULTRA_STRING_MAX_LEN; | |
2302 | ||
07f6c4bc | 2303 | rcu_read_lock(); |
e05b31f4 | 2304 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2305 | for (i = 0; i < tbl->size; i++) { |
2306 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2307 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2308 | str_len += tipc_sk_show(tsk, pb + str_len, | |
2309 | pb_len - str_len, 0); | |
2310 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2311 | } | |
5a9ee0be | 2312 | } |
07f6c4bc YX |
2313 | rcu_read_unlock(); |
2314 | ||
5a9ee0be JPM |
2315 | str_len += 1; /* for "\0" */ |
2316 | skb_put(buf, TLV_SPACE(str_len)); | |
2317 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
2318 | ||
2319 | return buf; | |
2320 | } | |
2321 | ||
2322 | /* tipc_sk_reinit: set non-zero address in all existing sockets | |
2323 | * when we go from standalone to network mode. | |
2324 | */ | |
e05b31f4 | 2325 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2326 | { |
e05b31f4 | 2327 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2328 | const struct bucket_table *tbl; |
2329 | struct rhash_head *pos; | |
2330 | struct tipc_sock *tsk; | |
5a9ee0be | 2331 | struct tipc_msg *msg; |
07f6c4bc | 2332 | int i; |
5a9ee0be | 2333 | |
07f6c4bc | 2334 | rcu_read_lock(); |
e05b31f4 | 2335 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2336 | for (i = 0; i < tbl->size; i++) { |
2337 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2338 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2339 | msg = &tsk->phdr; | |
34747539 YX |
2340 | msg_set_prevnode(msg, tn->own_addr); |
2341 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2342 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2343 | } | |
5a9ee0be | 2344 | } |
07f6c4bc | 2345 | rcu_read_unlock(); |
5a9ee0be JPM |
2346 | } |
2347 | ||
e05b31f4 | 2348 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2349 | { |
e05b31f4 | 2350 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2351 | struct tipc_sock *tsk; |
808d90f9 | 2352 | |
07f6c4bc | 2353 | rcu_read_lock(); |
e05b31f4 | 2354 | tsk = rhashtable_lookup(&tn->sk_rht, &portid); |
07f6c4bc YX |
2355 | if (tsk) |
2356 | sock_hold(&tsk->sk); | |
2357 | rcu_read_unlock(); | |
808d90f9 | 2358 | |
07f6c4bc | 2359 | return tsk; |
808d90f9 JPM |
2360 | } |
2361 | ||
07f6c4bc | 2362 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2363 | { |
e05b31f4 YX |
2364 | struct sock *sk = &tsk->sk; |
2365 | struct net *net = sock_net(sk); | |
2366 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2367 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2368 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2369 | |
07f6c4bc YX |
2370 | while (remaining--) { |
2371 | portid++; | |
2372 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2373 | portid = TIPC_MIN_PORT; | |
2374 | tsk->portid = portid; | |
2375 | sock_hold(&tsk->sk); | |
e05b31f4 | 2376 | if (rhashtable_lookup_insert(&tn->sk_rht, &tsk->node)) |
07f6c4bc YX |
2377 | return 0; |
2378 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2379 | } |
2380 | ||
07f6c4bc | 2381 | return -1; |
808d90f9 JPM |
2382 | } |
2383 | ||
07f6c4bc | 2384 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2385 | { |
07f6c4bc | 2386 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2387 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2388 | |
e05b31f4 | 2389 | if (rhashtable_remove(&tn->sk_rht, &tsk->node)) { |
07f6c4bc YX |
2390 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2391 | __sock_put(sk); | |
808d90f9 | 2392 | } |
808d90f9 JPM |
2393 | } |
2394 | ||
e05b31f4 | 2395 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2396 | { |
e05b31f4 | 2397 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2398 | struct rhashtable_params rht_params = { |
2399 | .nelem_hint = 192, | |
2400 | .head_offset = offsetof(struct tipc_sock, node), | |
2401 | .key_offset = offsetof(struct tipc_sock, portid), | |
2402 | .key_len = sizeof(u32), /* portid */ | |
2403 | .hashfn = jhash, | |
2404 | .max_shift = 20, /* 1M */ | |
2405 | .min_shift = 8, /* 256 */ | |
2406 | .grow_decision = rht_grow_above_75, | |
2407 | .shrink_decision = rht_shrink_below_30, | |
2408 | }; | |
808d90f9 | 2409 | |
e05b31f4 | 2410 | return rhashtable_init(&tn->sk_rht, &rht_params); |
808d90f9 JPM |
2411 | } |
2412 | ||
e05b31f4 | 2413 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2414 | { |
e05b31f4 YX |
2415 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2416 | ||
07f6c4bc YX |
2417 | /* Wait for socket readers to complete */ |
2418 | synchronize_net(); | |
808d90f9 | 2419 | |
e05b31f4 | 2420 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2421 | } |
2422 | ||
b97bf3fd | 2423 | /** |
247f0f3c | 2424 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2425 | * @sock: socket structure |
2426 | * @lvl: option level | |
2427 | * @opt: option identifier | |
2428 | * @ov: pointer to new option value | |
2429 | * @ol: length of option value | |
c4307285 YH |
2430 | * |
2431 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2432 | * (to ease compatibility). |
c4307285 | 2433 | * |
b97bf3fd PL |
2434 | * Returns 0 on success, errno otherwise |
2435 | */ | |
247f0f3c YX |
2436 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2437 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2438 | { |
0c3141e9 | 2439 | struct sock *sk = sock->sk; |
58ed9442 | 2440 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2441 | u32 value; |
2442 | int res; | |
2443 | ||
c4307285 YH |
2444 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2445 | return 0; | |
b97bf3fd PL |
2446 | if (lvl != SOL_TIPC) |
2447 | return -ENOPROTOOPT; | |
2448 | if (ol < sizeof(value)) | |
2449 | return -EINVAL; | |
2db9983a AS |
2450 | res = get_user(value, (u32 __user *)ov); |
2451 | if (res) | |
b97bf3fd PL |
2452 | return res; |
2453 | ||
0c3141e9 | 2454 | lock_sock(sk); |
c4307285 | 2455 | |
b97bf3fd PL |
2456 | switch (opt) { |
2457 | case TIPC_IMPORTANCE: | |
301bae56 | 2458 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2459 | break; |
2460 | case TIPC_SRC_DROPPABLE: | |
2461 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2462 | tsk_set_unreliable(tsk, value); |
c4307285 | 2463 | else |
b97bf3fd PL |
2464 | res = -ENOPROTOOPT; |
2465 | break; | |
2466 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2467 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2468 | break; |
2469 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2470 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2471 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2472 | break; |
2473 | default: | |
2474 | res = -EINVAL; | |
2475 | } | |
2476 | ||
0c3141e9 AS |
2477 | release_sock(sk); |
2478 | ||
b97bf3fd PL |
2479 | return res; |
2480 | } | |
2481 | ||
2482 | /** | |
247f0f3c | 2483 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2484 | * @sock: socket structure |
2485 | * @lvl: option level | |
2486 | * @opt: option identifier | |
2487 | * @ov: receptacle for option value | |
2488 | * @ol: receptacle for length of option value | |
c4307285 YH |
2489 | * |
2490 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2491 | * (to ease compatibility). |
c4307285 | 2492 | * |
b97bf3fd PL |
2493 | * Returns 0 on success, errno otherwise |
2494 | */ | |
247f0f3c YX |
2495 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2496 | char __user *ov, int __user *ol) | |
b97bf3fd | 2497 | { |
0c3141e9 | 2498 | struct sock *sk = sock->sk; |
58ed9442 | 2499 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2500 | int len; |
b97bf3fd | 2501 | u32 value; |
c4307285 | 2502 | int res; |
b97bf3fd | 2503 | |
c4307285 YH |
2504 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2505 | return put_user(0, ol); | |
b97bf3fd PL |
2506 | if (lvl != SOL_TIPC) |
2507 | return -ENOPROTOOPT; | |
2db9983a AS |
2508 | res = get_user(len, ol); |
2509 | if (res) | |
c4307285 | 2510 | return res; |
b97bf3fd | 2511 | |
0c3141e9 | 2512 | lock_sock(sk); |
b97bf3fd PL |
2513 | |
2514 | switch (opt) { | |
2515 | case TIPC_IMPORTANCE: | |
301bae56 | 2516 | value = tsk_importance(tsk); |
b97bf3fd PL |
2517 | break; |
2518 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2519 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2520 | break; |
2521 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2522 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2523 | break; |
2524 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2525 | value = tsk->conn_timeout; |
0c3141e9 | 2526 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2527 | break; |
0e65967e | 2528 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2529 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2530 | break; |
0e65967e | 2531 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2532 | value = skb_queue_len(&sk->sk_receive_queue); |
2533 | break; | |
b97bf3fd PL |
2534 | default: |
2535 | res = -EINVAL; | |
2536 | } | |
2537 | ||
0c3141e9 AS |
2538 | release_sock(sk); |
2539 | ||
25860c3b PG |
2540 | if (res) |
2541 | return res; /* "get" failed */ | |
b97bf3fd | 2542 | |
25860c3b PG |
2543 | if (len < sizeof(value)) |
2544 | return -EINVAL; | |
2545 | ||
2546 | if (copy_to_user(ov, &value, sizeof(value))) | |
2547 | return -EFAULT; | |
2548 | ||
2549 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2550 | } |
2551 | ||
f2f9800d | 2552 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2553 | { |
f2f9800d | 2554 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2555 | struct tipc_sioc_ln_req lnr; |
2556 | void __user *argp = (void __user *)arg; | |
2557 | ||
2558 | switch (cmd) { | |
2559 | case SIOCGETLINKNAME: | |
2560 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2561 | return -EFAULT; | |
f2f9800d YX |
2562 | if (!tipc_node_get_linkname(sock_net(sk), |
2563 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2564 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2565 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2566 | return -EFAULT; | |
2567 | return 0; | |
2568 | } | |
2569 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2570 | default: |
2571 | return -ENOIOCTLCMD; | |
2572 | } | |
2573 | } | |
2574 | ||
ae86b9e3 BH |
2575 | /* Protocol switches for the various types of TIPC sockets */ |
2576 | ||
bca65eae | 2577 | static const struct proto_ops msg_ops = { |
0e65967e | 2578 | .owner = THIS_MODULE, |
b97bf3fd | 2579 | .family = AF_TIPC, |
247f0f3c YX |
2580 | .release = tipc_release, |
2581 | .bind = tipc_bind, | |
2582 | .connect = tipc_connect, | |
5eee6a6d | 2583 | .socketpair = sock_no_socketpair, |
245f3d34 | 2584 | .accept = sock_no_accept, |
247f0f3c YX |
2585 | .getname = tipc_getname, |
2586 | .poll = tipc_poll, | |
78acb1f9 | 2587 | .ioctl = tipc_ioctl, |
245f3d34 | 2588 | .listen = sock_no_listen, |
247f0f3c YX |
2589 | .shutdown = tipc_shutdown, |
2590 | .setsockopt = tipc_setsockopt, | |
2591 | .getsockopt = tipc_getsockopt, | |
2592 | .sendmsg = tipc_sendmsg, | |
2593 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2594 | .mmap = sock_no_mmap, |
2595 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2596 | }; |
2597 | ||
bca65eae | 2598 | static const struct proto_ops packet_ops = { |
0e65967e | 2599 | .owner = THIS_MODULE, |
b97bf3fd | 2600 | .family = AF_TIPC, |
247f0f3c YX |
2601 | .release = tipc_release, |
2602 | .bind = tipc_bind, | |
2603 | .connect = tipc_connect, | |
5eee6a6d | 2604 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2605 | .accept = tipc_accept, |
2606 | .getname = tipc_getname, | |
2607 | .poll = tipc_poll, | |
78acb1f9 | 2608 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2609 | .listen = tipc_listen, |
2610 | .shutdown = tipc_shutdown, | |
2611 | .setsockopt = tipc_setsockopt, | |
2612 | .getsockopt = tipc_getsockopt, | |
2613 | .sendmsg = tipc_send_packet, | |
2614 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2615 | .mmap = sock_no_mmap, |
2616 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2617 | }; |
2618 | ||
bca65eae | 2619 | static const struct proto_ops stream_ops = { |
0e65967e | 2620 | .owner = THIS_MODULE, |
b97bf3fd | 2621 | .family = AF_TIPC, |
247f0f3c YX |
2622 | .release = tipc_release, |
2623 | .bind = tipc_bind, | |
2624 | .connect = tipc_connect, | |
5eee6a6d | 2625 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2626 | .accept = tipc_accept, |
2627 | .getname = tipc_getname, | |
2628 | .poll = tipc_poll, | |
78acb1f9 | 2629 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2630 | .listen = tipc_listen, |
2631 | .shutdown = tipc_shutdown, | |
2632 | .setsockopt = tipc_setsockopt, | |
2633 | .getsockopt = tipc_getsockopt, | |
2634 | .sendmsg = tipc_send_stream, | |
2635 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2636 | .mmap = sock_no_mmap, |
2637 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2638 | }; |
2639 | ||
bca65eae | 2640 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2641 | .owner = THIS_MODULE, |
b97bf3fd | 2642 | .family = AF_TIPC, |
c5fa7b3c | 2643 | .create = tipc_sk_create |
b97bf3fd PL |
2644 | }; |
2645 | ||
2646 | static struct proto tipc_proto = { | |
2647 | .name = "TIPC", | |
2648 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2649 | .obj_size = sizeof(struct tipc_sock), |
2650 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2651 | }; |
2652 | ||
c5fa7b3c YX |
2653 | static struct proto tipc_proto_kern = { |
2654 | .name = "TIPC", | |
2655 | .obj_size = sizeof(struct tipc_sock), | |
2656 | .sysctl_rmem = sysctl_tipc_rmem | |
2657 | }; | |
2658 | ||
b97bf3fd | 2659 | /** |
4323add6 | 2660 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2661 | * |
b97bf3fd PL |
2662 | * Returns 0 on success, errno otherwise |
2663 | */ | |
4323add6 | 2664 | int tipc_socket_init(void) |
b97bf3fd PL |
2665 | { |
2666 | int res; | |
2667 | ||
c4307285 | 2668 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2669 | if (res) { |
2cf8aa19 | 2670 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2671 | goto out; |
2672 | } | |
2673 | ||
2674 | res = sock_register(&tipc_family_ops); | |
2675 | if (res) { | |
2cf8aa19 | 2676 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2677 | proto_unregister(&tipc_proto); |
2678 | goto out; | |
2679 | } | |
b97bf3fd PL |
2680 | out: |
2681 | return res; | |
2682 | } | |
2683 | ||
2684 | /** | |
4323add6 | 2685 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2686 | */ |
4323add6 | 2687 | void tipc_socket_stop(void) |
b97bf3fd | 2688 | { |
b97bf3fd PL |
2689 | sock_unregister(tipc_family_ops.family); |
2690 | proto_unregister(&tipc_proto); | |
2691 | } | |
34b78a12 RA |
2692 | |
2693 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2694 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2695 | { |
2696 | u32 peer_node; | |
2697 | u32 peer_port; | |
2698 | struct nlattr *nest; | |
2699 | ||
2700 | peer_node = tsk_peer_node(tsk); | |
2701 | peer_port = tsk_peer_port(tsk); | |
2702 | ||
2703 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2704 | ||
2705 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2706 | goto msg_full; | |
2707 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2708 | goto msg_full; | |
2709 | ||
2710 | if (tsk->conn_type != 0) { | |
2711 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2712 | goto msg_full; | |
2713 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2714 | goto msg_full; | |
2715 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2716 | goto msg_full; | |
2717 | } | |
2718 | nla_nest_end(skb, nest); | |
2719 | ||
2720 | return 0; | |
2721 | ||
2722 | msg_full: | |
2723 | nla_nest_cancel(skb, nest); | |
2724 | ||
2725 | return -EMSGSIZE; | |
2726 | } | |
2727 | ||
2728 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2729 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2730 | struct tipc_sock *tsk) | |
34b78a12 RA |
2731 | { |
2732 | int err; | |
2733 | void *hdr; | |
2734 | struct nlattr *attrs; | |
34747539 YX |
2735 | struct net *net = sock_net(skb->sk); |
2736 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2737 | |
2738 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2739 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); | |
2740 | if (!hdr) | |
2741 | goto msg_cancel; | |
2742 | ||
2743 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2744 | if (!attrs) | |
2745 | goto genlmsg_cancel; | |
07f6c4bc | 2746 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2747 | goto attr_msg_cancel; |
34747539 | 2748 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2749 | goto attr_msg_cancel; |
2750 | ||
2751 | if (tsk->connected) { | |
2752 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2753 | if (err) | |
2754 | goto attr_msg_cancel; | |
2755 | } else if (!list_empty(&tsk->publications)) { | |
2756 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2757 | goto attr_msg_cancel; | |
2758 | } | |
2759 | nla_nest_end(skb, attrs); | |
2760 | genlmsg_end(skb, hdr); | |
2761 | ||
2762 | return 0; | |
2763 | ||
2764 | attr_msg_cancel: | |
2765 | nla_nest_cancel(skb, attrs); | |
2766 | genlmsg_cancel: | |
2767 | genlmsg_cancel(skb, hdr); | |
2768 | msg_cancel: | |
2769 | return -EMSGSIZE; | |
2770 | } | |
2771 | ||
2772 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2773 | { | |
2774 | int err; | |
2775 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2776 | const struct bucket_table *tbl; |
2777 | struct rhash_head *pos; | |
e05b31f4 YX |
2778 | struct net *net = sock_net(skb->sk); |
2779 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2780 | u32 tbl_id = cb->args[0]; |
2781 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2782 | |
07f6c4bc | 2783 | rcu_read_lock(); |
e05b31f4 | 2784 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2785 | for (; tbl_id < tbl->size; tbl_id++) { |
2786 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2787 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2788 | if (prev_portid && prev_portid != tsk->portid) { |
2789 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2790 | continue; | |
2791 | } | |
2792 | ||
07f6c4bc | 2793 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2794 | if (err) { |
2795 | prev_portid = tsk->portid; | |
2796 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2797 | goto out; | |
2798 | } | |
2799 | prev_portid = 0; | |
07f6c4bc | 2800 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2801 | } |
34b78a12 | 2802 | } |
d6e164e3 | 2803 | out: |
07f6c4bc | 2804 | rcu_read_unlock(); |
d6e164e3 RA |
2805 | cb->args[0] = tbl_id; |
2806 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2807 | |
2808 | return skb->len; | |
2809 | } | |
1a1a143d RA |
2810 | |
2811 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2812 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2813 | struct netlink_callback *cb, | |
2814 | struct publication *publ) | |
1a1a143d RA |
2815 | { |
2816 | void *hdr; | |
2817 | struct nlattr *attrs; | |
2818 | ||
2819 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2820 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); | |
2821 | if (!hdr) | |
2822 | goto msg_cancel; | |
2823 | ||
2824 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2825 | if (!attrs) | |
2826 | goto genlmsg_cancel; | |
2827 | ||
2828 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2829 | goto attr_msg_cancel; | |
2830 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2831 | goto attr_msg_cancel; | |
2832 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2833 | goto attr_msg_cancel; | |
2834 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2835 | goto attr_msg_cancel; | |
2836 | ||
2837 | nla_nest_end(skb, attrs); | |
2838 | genlmsg_end(skb, hdr); | |
2839 | ||
2840 | return 0; | |
2841 | ||
2842 | attr_msg_cancel: | |
2843 | nla_nest_cancel(skb, attrs); | |
2844 | genlmsg_cancel: | |
2845 | genlmsg_cancel(skb, hdr); | |
2846 | msg_cancel: | |
2847 | return -EMSGSIZE; | |
2848 | } | |
2849 | ||
2850 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2851 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2852 | struct netlink_callback *cb, | |
2853 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2854 | { |
2855 | int err; | |
2856 | struct publication *p; | |
2857 | ||
2858 | if (*last_publ) { | |
2859 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2860 | if (p->key == *last_publ) | |
2861 | break; | |
2862 | } | |
2863 | if (p->key != *last_publ) { | |
2864 | /* We never set seq or call nl_dump_check_consistent() | |
2865 | * this means that setting prev_seq here will cause the | |
2866 | * consistence check to fail in the netlink callback | |
2867 | * handler. Resulting in the last NLMSG_DONE message | |
2868 | * having the NLM_F_DUMP_INTR flag set. | |
2869 | */ | |
2870 | cb->prev_seq = 1; | |
2871 | *last_publ = 0; | |
2872 | return -EPIPE; | |
2873 | } | |
2874 | } else { | |
2875 | p = list_first_entry(&tsk->publications, struct publication, | |
2876 | pport_list); | |
2877 | } | |
2878 | ||
2879 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2880 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2881 | if (err) { | |
2882 | *last_publ = p->key; | |
2883 | return err; | |
2884 | } | |
2885 | } | |
2886 | *last_publ = 0; | |
2887 | ||
2888 | return 0; | |
2889 | } | |
2890 | ||
2891 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2892 | { | |
2893 | int err; | |
07f6c4bc | 2894 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2895 | u32 last_publ = cb->args[1]; |
2896 | u32 done = cb->args[2]; | |
e05b31f4 | 2897 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2898 | struct tipc_sock *tsk; |
2899 | ||
07f6c4bc | 2900 | if (!tsk_portid) { |
1a1a143d RA |
2901 | struct nlattr **attrs; |
2902 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2903 | ||
2904 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2905 | if (err) | |
2906 | return err; | |
2907 | ||
2908 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2909 | attrs[TIPC_NLA_SOCK], | |
2910 | tipc_nl_sock_policy); | |
2911 | if (err) | |
2912 | return err; | |
2913 | ||
2914 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2915 | return -EINVAL; | |
2916 | ||
07f6c4bc | 2917 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2918 | } |
2919 | ||
2920 | if (done) | |
2921 | return 0; | |
2922 | ||
e05b31f4 | 2923 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2924 | if (!tsk) |
2925 | return -EINVAL; | |
2926 | ||
2927 | lock_sock(&tsk->sk); | |
2928 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2929 | if (!err) | |
2930 | done = 1; | |
2931 | release_sock(&tsk->sk); | |
07f6c4bc | 2932 | sock_put(&tsk->sk); |
1a1a143d | 2933 | |
07f6c4bc | 2934 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2935 | cb->args[1] = last_publ; |
2936 | cb->args[2] = done; | |
2937 | ||
2938 | return skb->len; | |
2939 | } |