Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2001-2007, 2012-2015, 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" |
c637c103 | 43 | #include "name_distr.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); | |
39a0295f YX |
117 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
118 | size_t dsz); | |
119 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 120 | |
bca65eae FW |
121 | static const struct proto_ops packet_ops; |
122 | static const struct proto_ops stream_ops; | |
123 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
124 | static struct proto tipc_proto; |
125 | ||
1a1a143d RA |
126 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
127 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
128 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
129 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
130 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
131 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
132 | }; | |
133 | ||
c4307285 | 134 | /* |
0c3141e9 AS |
135 | * Revised TIPC socket locking policy: |
136 | * | |
137 | * Most socket operations take the standard socket lock when they start | |
138 | * and hold it until they finish (or until they need to sleep). Acquiring | |
139 | * this lock grants the owner exclusive access to the fields of the socket | |
140 | * data structures, with the exception of the backlog queue. A few socket | |
141 | * operations can be done without taking the socket lock because they only | |
142 | * read socket information that never changes during the life of the socket. | |
143 | * | |
144 | * Socket operations may acquire the lock for the associated TIPC port if they | |
145 | * need to perform an operation on the port. If any routine needs to acquire | |
146 | * both the socket lock and the port lock it must take the socket lock first | |
147 | * to avoid the risk of deadlock. | |
148 | * | |
149 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
150 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
151 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
152 | * and either handles the message itself or adds it to the socket's backlog | |
153 | * queue; in the latter case the queued message is processed once the process | |
154 | * owning the socket lock releases it. | |
155 | * | |
156 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
157 | * the problem of a blocked socket operation preventing any other operations | |
158 | * from occurring. However, applications must be careful if they have | |
159 | * multiple threads trying to send (or receive) on the same socket, as these | |
160 | * operations might interfere with each other. For example, doing a connect | |
161 | * and a receive at the same time might allow the receive to consume the | |
162 | * ACK message meant for the connect. While additional work could be done | |
163 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
164 | * | |
165 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
166 | * that another operation that must be performed in a non-blocking manner is | |
167 | * not delayed for very long because the lock has already been taken. | |
168 | * | |
169 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
170 | * constant over its lifetime; such fields can be examined without taking | |
171 | * the socket lock and/or port lock, and do not need to be re-read even | |
172 | * after resuming processing after waiting. These fields include: | |
173 | * - socket type | |
174 | * - pointer to socket sk structure (aka tipc_sock structure) | |
175 | * - pointer to port structure | |
176 | * - port reference | |
177 | */ | |
178 | ||
c5898636 JPM |
179 | static u32 tsk_own_node(struct tipc_sock *tsk) |
180 | { | |
181 | return msg_prevnode(&tsk->phdr); | |
182 | } | |
183 | ||
301bae56 | 184 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 185 | { |
301bae56 | 186 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
187 | } |
188 | ||
301bae56 | 189 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 190 | { |
301bae56 | 191 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
192 | } |
193 | ||
301bae56 | 194 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 195 | { |
301bae56 | 196 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
197 | } |
198 | ||
301bae56 | 199 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 200 | { |
301bae56 | 201 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
202 | } |
203 | ||
301bae56 | 204 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 205 | { |
301bae56 | 206 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
207 | } |
208 | ||
301bae56 | 209 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 210 | { |
301bae56 | 211 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
212 | } |
213 | ||
301bae56 | 214 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 215 | { |
301bae56 | 216 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
217 | } |
218 | ||
301bae56 | 219 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
220 | { |
221 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
222 | return -EINVAL; | |
301bae56 | 223 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
224 | return 0; |
225 | } | |
8826cde6 | 226 | |
301bae56 JPM |
227 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
228 | { | |
229 | return container_of(sk, struct tipc_sock, sk); | |
230 | } | |
231 | ||
232 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
233 | { | |
234 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
235 | } | |
236 | ||
0c3141e9 | 237 | /** |
2e84c60b | 238 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
239 | * |
240 | * Caller must hold socket lock | |
b97bf3fd | 241 | */ |
2e84c60b | 242 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 243 | { |
5f6d9123 | 244 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
245 | } |
246 | ||
b97bf3fd | 247 | /** |
2e84c60b | 248 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
249 | * |
250 | * Caller must hold socket lock | |
b97bf3fd | 251 | */ |
2e84c60b | 252 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 253 | { |
a6ca1094 | 254 | struct sk_buff *skb; |
8db1bae3 | 255 | u32 dnode; |
c5898636 | 256 | u32 own_node = tsk_own_node(tipc_sk(sk)); |
0c3141e9 | 257 | |
a6ca1094 | 258 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
c5898636 JPM |
259 | if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT)) |
260 | tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0); | |
8db1bae3 | 261 | } |
b97bf3fd PL |
262 | } |
263 | ||
2e84c60b | 264 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
265 | * |
266 | * Handles cases where the node's network address has changed from | |
267 | * the default of <0.0.0> to its configured setting. | |
268 | */ | |
2e84c60b | 269 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 270 | { |
34747539 | 271 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 272 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
273 | u32 orig_node; |
274 | u32 peer_node; | |
275 | ||
301bae56 | 276 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
277 | return false; |
278 | ||
279 | if (unlikely(msg_origport(msg) != peer_port)) | |
280 | return false; | |
281 | ||
282 | orig_node = msg_orignode(msg); | |
301bae56 | 283 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
284 | |
285 | if (likely(orig_node == peer_node)) | |
286 | return true; | |
287 | ||
34747539 | 288 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
289 | return true; |
290 | ||
34747539 | 291 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
292 | return true; |
293 | ||
294 | return false; | |
295 | } | |
296 | ||
b97bf3fd | 297 | /** |
c5fa7b3c | 298 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 299 | * @net: network namespace (must be default network) |
b97bf3fd PL |
300 | * @sock: pre-allocated socket structure |
301 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 302 | * @kern: caused by kernel or by userspace? |
c4307285 | 303 | * |
0c3141e9 AS |
304 | * This routine creates additional data structures used by the TIPC socket, |
305 | * initializes them, and links them together. | |
b97bf3fd PL |
306 | * |
307 | * Returns 0 on success, errno otherwise | |
308 | */ | |
58ed9442 JPM |
309 | static int tipc_sk_create(struct net *net, struct socket *sock, |
310 | int protocol, int kern) | |
b97bf3fd | 311 | { |
c5898636 | 312 | struct tipc_net *tn; |
0c3141e9 AS |
313 | const struct proto_ops *ops; |
314 | socket_state state; | |
b97bf3fd | 315 | struct sock *sk; |
58ed9442 | 316 | struct tipc_sock *tsk; |
5b8fa7ce | 317 | struct tipc_msg *msg; |
0c3141e9 AS |
318 | |
319 | /* Validate arguments */ | |
b97bf3fd PL |
320 | if (unlikely(protocol != 0)) |
321 | return -EPROTONOSUPPORT; | |
322 | ||
b97bf3fd PL |
323 | switch (sock->type) { |
324 | case SOCK_STREAM: | |
0c3141e9 AS |
325 | ops = &stream_ops; |
326 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
327 | break; |
328 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
329 | ops = &packet_ops; |
330 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
331 | break; |
332 | case SOCK_DGRAM: | |
b97bf3fd | 333 | case SOCK_RDM: |
0c3141e9 AS |
334 | ops = &msg_ops; |
335 | state = SS_READY; | |
b97bf3fd | 336 | break; |
49978651 | 337 | default: |
49978651 | 338 | return -EPROTOTYPE; |
b97bf3fd PL |
339 | } |
340 | ||
0c3141e9 | 341 | /* Allocate socket's protocol area */ |
76100a8a | 342 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); |
0c3141e9 | 343 | if (sk == NULL) |
b97bf3fd | 344 | return -ENOMEM; |
b97bf3fd | 345 | |
58ed9442 | 346 | tsk = tipc_sk(sk); |
301bae56 | 347 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
348 | INIT_LIST_HEAD(&tsk->publications); |
349 | msg = &tsk->phdr; | |
c5898636 JPM |
350 | tn = net_generic(sock_net(sk), tipc_net_id); |
351 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 352 | NAMED_H_SIZE, 0); |
b97bf3fd | 353 | |
0c3141e9 | 354 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
355 | sock->ops = ops; |
356 | sock->state = state; | |
0c3141e9 | 357 | sock_init_data(sock, sk); |
07f6c4bc YX |
358 | if (tipc_sk_insert(tsk)) { |
359 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
360 | return -EINVAL; | |
361 | } | |
362 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 363 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 364 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 365 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
366 | sk->sk_data_ready = tipc_data_ready; |
367 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 368 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 369 | tsk->sent_unacked = 0; |
4f4482dc | 370 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 371 | |
0c3141e9 | 372 | if (sock->state == SS_READY) { |
301bae56 | 373 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 374 | if (sock->type == SOCK_DGRAM) |
301bae56 | 375 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 376 | } |
b97bf3fd PL |
377 | return 0; |
378 | } | |
379 | ||
07f6c4bc YX |
380 | static void tipc_sk_callback(struct rcu_head *head) |
381 | { | |
382 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
383 | ||
384 | sock_put(&tsk->sk); | |
385 | } | |
386 | ||
b97bf3fd | 387 | /** |
247f0f3c | 388 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
389 | * @sock: socket to destroy |
390 | * | |
391 | * This routine cleans up any messages that are still queued on the socket. | |
392 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
393 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
394 | * and any others are discarded. (If the first message on a STREAM socket | |
395 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 396 | * |
b97bf3fd PL |
397 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
398 | * are returned or discarded according to the "destination droppable" setting | |
399 | * specified for the message by the sender. | |
400 | * | |
401 | * Returns 0 on success, errno otherwise | |
402 | */ | |
247f0f3c | 403 | static int tipc_release(struct socket *sock) |
b97bf3fd | 404 | { |
b97bf3fd | 405 | struct sock *sk = sock->sk; |
357c4774 | 406 | struct net *net; |
58ed9442 | 407 | struct tipc_sock *tsk; |
a6ca1094 | 408 | struct sk_buff *skb; |
f2f2a96a | 409 | u32 dnode, probing_state; |
b97bf3fd | 410 | |
0c3141e9 AS |
411 | /* |
412 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
413 | * releases a pre-allocated child socket that was never used) | |
414 | */ | |
0c3141e9 | 415 | if (sk == NULL) |
b97bf3fd | 416 | return 0; |
c4307285 | 417 | |
357c4774 | 418 | net = sock_net(sk); |
58ed9442 | 419 | tsk = tipc_sk(sk); |
0c3141e9 AS |
420 | lock_sock(sk); |
421 | ||
422 | /* | |
423 | * Reject all unreceived messages, except on an active connection | |
424 | * (which disconnects locally & sends a 'FIN+' to peer) | |
425 | */ | |
301bae56 | 426 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 427 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
428 | skb = __skb_dequeue(&sk->sk_receive_queue); |
429 | if (skb == NULL) | |
b97bf3fd | 430 | break; |
a6ca1094 YX |
431 | if (TIPC_SKB_CB(skb)->handle != NULL) |
432 | kfree_skb(skb); | |
0c3141e9 AS |
433 | else { |
434 | if ((sock->state == SS_CONNECTING) || | |
435 | (sock->state == SS_CONNECTED)) { | |
436 | sock->state = SS_DISCONNECTING; | |
301bae56 | 437 | tsk->connected = 0; |
f2f9800d | 438 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 439 | } |
c5898636 | 440 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 441 | TIPC_ERR_NO_PORT)) |
f2f9800d | 442 | tipc_link_xmit_skb(net, skb, dnode, 0); |
0c3141e9 | 443 | } |
b97bf3fd PL |
444 | } |
445 | ||
301bae56 | 446 | tipc_sk_withdraw(tsk, 0, NULL); |
f2f2a96a | 447 | probing_state = tsk->probing_state; |
3721e9c7 YX |
448 | if (del_timer_sync(&sk->sk_timer) && |
449 | probing_state != TIPC_CONN_PROBING) | |
f2f2a96a | 450 | sock_put(sk); |
07f6c4bc | 451 | tipc_sk_remove(tsk); |
301bae56 | 452 | if (tsk->connected) { |
c5898636 | 453 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 454 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 455 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 456 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 457 | if (skb) |
f2f9800d YX |
458 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
459 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
5b8fa7ce | 460 | } |
b97bf3fd | 461 | |
0c3141e9 | 462 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 463 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 464 | |
0c3141e9 | 465 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
466 | sock->state = SS_DISCONNECTING; |
467 | release_sock(sk); | |
07f6c4bc YX |
468 | |
469 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 470 | sock->sk = NULL; |
b97bf3fd | 471 | |
065d7e39 | 472 | return 0; |
b97bf3fd PL |
473 | } |
474 | ||
475 | /** | |
247f0f3c | 476 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
477 | * @sock: socket structure |
478 | * @uaddr: socket address describing name(s) and desired operation | |
479 | * @uaddr_len: size of socket address data structure | |
c4307285 | 480 | * |
b97bf3fd PL |
481 | * Name and name sequence binding is indicated using a positive scope value; |
482 | * a negative scope value unbinds the specified name. Specifying no name | |
483 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 484 | * |
b97bf3fd | 485 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
486 | * |
487 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
488 | * access any non-constant socket information. | |
b97bf3fd | 489 | */ |
247f0f3c YX |
490 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
491 | int uaddr_len) | |
b97bf3fd | 492 | { |
84602761 | 493 | struct sock *sk = sock->sk; |
b97bf3fd | 494 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 495 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 496 | int res = -EINVAL; |
b97bf3fd | 497 | |
84602761 YX |
498 | lock_sock(sk); |
499 | if (unlikely(!uaddr_len)) { | |
301bae56 | 500 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
501 | goto exit; |
502 | } | |
c4307285 | 503 | |
84602761 YX |
504 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
505 | res = -EINVAL; | |
506 | goto exit; | |
507 | } | |
508 | if (addr->family != AF_TIPC) { | |
509 | res = -EAFNOSUPPORT; | |
510 | goto exit; | |
511 | } | |
b97bf3fd | 512 | |
b97bf3fd PL |
513 | if (addr->addrtype == TIPC_ADDR_NAME) |
514 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
515 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
516 | res = -EAFNOSUPPORT; | |
517 | goto exit; | |
518 | } | |
c4307285 | 519 | |
13a2e898 | 520 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 521 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
522 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
523 | res = -EACCES; | |
524 | goto exit; | |
525 | } | |
c422f1bd | 526 | |
84602761 | 527 | res = (addr->scope > 0) ? |
301bae56 JPM |
528 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
529 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
530 | exit: |
531 | release_sock(sk); | |
532 | return res; | |
b97bf3fd PL |
533 | } |
534 | ||
c4307285 | 535 | /** |
247f0f3c | 536 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
537 | * @sock: socket structure |
538 | * @uaddr: area for returned socket address | |
539 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 540 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 541 | * |
b97bf3fd | 542 | * Returns 0 on success, errno otherwise |
0c3141e9 | 543 | * |
2da59918 AS |
544 | * NOTE: This routine doesn't need to take the socket lock since it only |
545 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 546 | * a completely predictable manner). |
b97bf3fd | 547 | */ |
247f0f3c YX |
548 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
549 | int *uaddr_len, int peer) | |
b97bf3fd | 550 | { |
b97bf3fd | 551 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 552 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 553 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 554 | |
88f8a5e3 | 555 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 556 | if (peer) { |
2da59918 AS |
557 | if ((sock->state != SS_CONNECTED) && |
558 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
559 | return -ENOTCONN; | |
301bae56 JPM |
560 | addr->addr.id.ref = tsk_peer_port(tsk); |
561 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 562 | } else { |
07f6c4bc | 563 | addr->addr.id.ref = tsk->portid; |
34747539 | 564 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 565 | } |
b97bf3fd PL |
566 | |
567 | *uaddr_len = sizeof(*addr); | |
568 | addr->addrtype = TIPC_ADDR_ID; | |
569 | addr->family = AF_TIPC; | |
570 | addr->scope = 0; | |
b97bf3fd PL |
571 | addr->addr.name.domain = 0; |
572 | ||
0c3141e9 | 573 | return 0; |
b97bf3fd PL |
574 | } |
575 | ||
576 | /** | |
247f0f3c | 577 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
578 | * @file: file structure associated with the socket |
579 | * @sock: socket for which to calculate the poll bits | |
580 | * @wait: ??? | |
581 | * | |
9b674e82 AS |
582 | * Returns pollmask value |
583 | * | |
584 | * COMMENTARY: | |
585 | * It appears that the usual socket locking mechanisms are not useful here | |
586 | * since the pollmask info is potentially out-of-date the moment this routine | |
587 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
588 | * to handle any preventable race conditions, so TIPC will do the same ... | |
589 | * | |
590 | * TIPC sets the returned events as follows: | |
f662c070 AS |
591 | * |
592 | * socket state flags set | |
593 | * ------------ --------- | |
594 | * unconnected no read flags | |
c4fc298a | 595 | * POLLOUT if port is not congested |
f662c070 AS |
596 | * |
597 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
598 | * no write flags | |
599 | * | |
600 | * connected POLLIN/POLLRDNORM if data in rx queue | |
601 | * POLLOUT if port is not congested | |
602 | * | |
603 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
604 | * no write flags | |
605 | * | |
606 | * listening POLLIN if SYN in rx queue | |
607 | * no write flags | |
608 | * | |
609 | * ready POLLIN/POLLRDNORM if data in rx queue | |
610 | * [connectionless] POLLOUT (since port cannot be congested) | |
611 | * | |
612 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
613 | * imply that the operation will succeed, merely that it should be performed | |
614 | * and will not block. | |
b97bf3fd | 615 | */ |
247f0f3c YX |
616 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
617 | poll_table *wait) | |
b97bf3fd | 618 | { |
9b674e82 | 619 | struct sock *sk = sock->sk; |
58ed9442 | 620 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 621 | u32 mask = 0; |
9b674e82 | 622 | |
f288bef4 | 623 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 624 | |
f662c070 | 625 | switch ((int)sock->state) { |
c4fc298a | 626 | case SS_UNCONNECTED: |
60120526 | 627 | if (!tsk->link_cong) |
c4fc298a EH |
628 | mask |= POLLOUT; |
629 | break; | |
f662c070 AS |
630 | case SS_READY: |
631 | case SS_CONNECTED: | |
301bae56 | 632 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
633 | mask |= POLLOUT; |
634 | /* fall thru' */ | |
635 | case SS_CONNECTING: | |
636 | case SS_LISTENING: | |
637 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
638 | mask |= (POLLIN | POLLRDNORM); | |
639 | break; | |
640 | case SS_DISCONNECTING: | |
641 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
642 | break; | |
643 | } | |
9b674e82 AS |
644 | |
645 | return mask; | |
b97bf3fd PL |
646 | } |
647 | ||
0abd8ff2 JPM |
648 | /** |
649 | * tipc_sendmcast - send multicast message | |
650 | * @sock: socket structure | |
651 | * @seq: destination address | |
562640f3 | 652 | * @msg: message to send |
0abd8ff2 JPM |
653 | * @dsz: total length of message data |
654 | * @timeo: timeout to wait for wakeup | |
655 | * | |
656 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
657 | * Returns the number of bytes sent on success, or errno | |
658 | */ | |
659 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 660 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
661 | { |
662 | struct sock *sk = sock->sk; | |
c5898636 | 663 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 664 | struct net *net = sock_net(sk); |
c5898636 | 665 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 666 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
f25dcc76 | 667 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
668 | uint mtu; |
669 | int rc; | |
670 | ||
671 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
672 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
673 | msg_set_destport(mhdr, 0); | |
674 | msg_set_destnode(mhdr, 0); | |
675 | msg_set_nametype(mhdr, seq->type); | |
676 | msg_set_namelower(mhdr, seq->lower); | |
677 | msg_set_nameupper(mhdr, seq->upper); | |
678 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
679 | ||
680 | new_mtu: | |
681 | mtu = tipc_bclink_get_mtu(); | |
94153e36 | 682 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
0abd8ff2 JPM |
683 | if (unlikely(rc < 0)) |
684 | return rc; | |
685 | ||
686 | do { | |
94153e36 | 687 | rc = tipc_bclink_xmit(net, pktchain); |
0abd8ff2 JPM |
688 | if (likely(rc >= 0)) { |
689 | rc = dsz; | |
690 | break; | |
691 | } | |
f25dcc76 AV |
692 | if (rc == -EMSGSIZE) { |
693 | msg->msg_iter = save; | |
0abd8ff2 | 694 | goto new_mtu; |
f25dcc76 | 695 | } |
0abd8ff2 JPM |
696 | if (rc != -ELINKCONG) |
697 | break; | |
50100a5e | 698 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
699 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
700 | if (rc) | |
94153e36 | 701 | __skb_queue_purge(pktchain); |
0abd8ff2 JPM |
702 | } while (!rc); |
703 | return rc; | |
704 | } | |
705 | ||
cb1b7280 JPM |
706 | /** |
707 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
708 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
709 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
710 | * | |
711 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 712 | */ |
cb1b7280 JPM |
713 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
714 | struct sk_buff_head *inputq) | |
078bec82 | 715 | { |
cb1b7280 | 716 | struct tipc_msg *msg; |
3c724acd | 717 | struct tipc_plist dports; |
3c724acd | 718 | u32 portid; |
078bec82 | 719 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
720 | struct sk_buff_head tmpq; |
721 | uint hsz; | |
722 | struct sk_buff *skb, *_skb; | |
3c724acd | 723 | |
cb1b7280 | 724 | __skb_queue_head_init(&tmpq); |
3c724acd | 725 | tipc_plist_init(&dports); |
078bec82 | 726 | |
cb1b7280 JPM |
727 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
728 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
729 | msg = buf_msg(skb); | |
730 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
731 | ||
732 | if (in_own_node(net, msg_orignode(msg))) | |
733 | scope = TIPC_NODE_SCOPE; | |
734 | ||
735 | /* Create destination port list and message clones: */ | |
736 | tipc_nametbl_mc_translate(net, | |
737 | msg_nametype(msg), msg_namelower(msg), | |
738 | msg_nameupper(msg), scope, &dports); | |
739 | portid = tipc_plist_pop(&dports); | |
740 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
741 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
742 | if (_skb) { | |
743 | msg_set_destport(buf_msg(_skb), portid); | |
744 | __skb_queue_tail(&tmpq, _skb); | |
745 | continue; | |
746 | } | |
747 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 748 | } |
cb1b7280 JPM |
749 | /* Append to inputq if not already done by other thread */ |
750 | spin_lock_bh(&inputq->lock); | |
751 | if (skb_peek(arrvq) == skb) { | |
752 | skb_queue_splice_tail_init(&tmpq, inputq); | |
753 | kfree_skb(__skb_dequeue(arrvq)); | |
754 | } | |
755 | spin_unlock_bh(&inputq->lock); | |
756 | __skb_queue_purge(&tmpq); | |
757 | kfree_skb(skb); | |
078bec82 | 758 | } |
cb1b7280 | 759 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
760 | } |
761 | ||
ac0074ee JPM |
762 | /** |
763 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
764 | * @tsk: receiving socket | |
1186adf7 | 765 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed. |
ac0074ee | 766 | */ |
1186adf7 | 767 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb) |
ac0074ee | 768 | { |
1186adf7 | 769 | struct tipc_msg *msg = buf_msg(*skb); |
60120526 | 770 | int conn_cong; |
1186adf7 JPM |
771 | u32 dnode; |
772 | u32 own_node = tsk_own_node(tsk); | |
ac0074ee | 773 | /* Ignore if connection cannot be validated: */ |
2e84c60b | 774 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
775 | goto exit; |
776 | ||
301bae56 | 777 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
778 | |
779 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 780 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
781 | tsk->sent_unacked -= msg_msgcnt(msg); |
782 | if (conn_cong) | |
50100a5e | 783 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee | 784 | } else if (msg_type(msg) == CONN_PROBE) { |
1186adf7 JPM |
785 | if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) { |
786 | msg_set_type(msg, CONN_PROBE_REPLY); | |
787 | return; | |
788 | } | |
ac0074ee JPM |
789 | } |
790 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
791 | exit: | |
1186adf7 JPM |
792 | kfree_skb(*skb); |
793 | *skb = NULL; | |
ac0074ee JPM |
794 | } |
795 | ||
3f40504f YX |
796 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
797 | { | |
798 | struct sock *sk = sock->sk; | |
58ed9442 | 799 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
800 | DEFINE_WAIT(wait); |
801 | int done; | |
802 | ||
803 | do { | |
804 | int err = sock_error(sk); | |
805 | if (err) | |
806 | return err; | |
807 | if (sock->state == SS_DISCONNECTING) | |
808 | return -EPIPE; | |
809 | if (!*timeo_p) | |
810 | return -EAGAIN; | |
811 | if (signal_pending(current)) | |
812 | return sock_intr_errno(*timeo_p); | |
813 | ||
814 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 815 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
816 | finish_wait(sk_sleep(sk), &wait); |
817 | } while (!done); | |
818 | return 0; | |
819 | } | |
820 | ||
b97bf3fd | 821 | /** |
247f0f3c | 822 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
823 | * @sock: socket structure |
824 | * @m: message to send | |
e2dafe87 | 825 | * @dsz: amount of user data to be sent |
c4307285 | 826 | * |
b97bf3fd | 827 | * Message must have an destination specified explicitly. |
c4307285 | 828 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
829 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
830 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 831 | * |
b97bf3fd PL |
832 | * Returns the number of bytes sent on success, or errno otherwise |
833 | */ | |
1b784140 | 834 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 835 | struct msghdr *m, size_t dsz) |
39a0295f YX |
836 | { |
837 | struct sock *sk = sock->sk; | |
838 | int ret; | |
839 | ||
840 | lock_sock(sk); | |
841 | ret = __tipc_sendmsg(sock, m, dsz); | |
842 | release_sock(sk); | |
843 | ||
844 | return ret; | |
845 | } | |
846 | ||
847 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 848 | { |
e2dafe87 | 849 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 850 | struct sock *sk = sock->sk; |
58ed9442 | 851 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 852 | struct net *net = sock_net(sk); |
301bae56 | 853 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 854 | u32 dnode, dport; |
94153e36 | 855 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
a6ca1094 | 856 | struct sk_buff *skb; |
e2dafe87 | 857 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
f25dcc76 | 858 | struct iov_iter save; |
e2dafe87 | 859 | u32 mtu; |
3f40504f | 860 | long timeo; |
88b17b6a | 861 | int rc; |
b97bf3fd PL |
862 | |
863 | if (unlikely(!dest)) | |
864 | return -EDESTADDRREQ; | |
e2dafe87 | 865 | |
51f9cc1f AS |
866 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
867 | (dest->family != AF_TIPC))) | |
b97bf3fd | 868 | return -EINVAL; |
e2dafe87 JPM |
869 | |
870 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 871 | return -EMSGSIZE; |
b97bf3fd | 872 | |
e2dafe87 | 873 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
874 | if (sock->state == SS_LISTENING) |
875 | return -EPIPE; | |
876 | if (sock->state != SS_UNCONNECTED) | |
877 | return -EISCONN; | |
878 | if (tsk->published) | |
879 | return -EOPNOTSUPP; | |
3388007b | 880 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
881 | tsk->conn_type = dest->addr.name.name.type; |
882 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 883 | } |
b97bf3fd PL |
884 | } |
885 | ||
3f40504f | 886 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
887 | |
888 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 889 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
890 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
891 | u32 type = dest->addr.name.name.type; | |
892 | u32 inst = dest->addr.name.name.instance; | |
893 | u32 domain = dest->addr.name.domain; | |
894 | ||
895 | dnode = domain; | |
896 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
897 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
898 | msg_set_nametype(mhdr, type); | |
899 | msg_set_nameinst(mhdr, inst); | |
900 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 901 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
902 | msg_set_destnode(mhdr, dnode); |
903 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
904 | if (unlikely(!dport && !dnode)) |
905 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
906 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
907 | dnode = dest->addr.id.node; | |
908 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
909 | msg_set_lookup_scope(mhdr, 0); | |
910 | msg_set_destnode(mhdr, dnode); | |
911 | msg_set_destport(mhdr, dest->addr.id.ref); | |
912 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
913 | } | |
914 | ||
f25dcc76 | 915 | save = m->msg_iter; |
e2dafe87 | 916 | new_mtu: |
f2f9800d | 917 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
94153e36 | 918 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
e2dafe87 | 919 | if (rc < 0) |
39a0295f | 920 | return rc; |
e2dafe87 JPM |
921 | |
922 | do { | |
94153e36 | 923 | skb = skb_peek(pktchain); |
a6ca1094 | 924 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
94153e36 | 925 | rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid); |
e2dafe87 JPM |
926 | if (likely(rc >= 0)) { |
927 | if (sock->state != SS_READY) | |
0c3141e9 | 928 | sock->state = SS_CONNECTING; |
e2dafe87 | 929 | rc = dsz; |
0c3141e9 | 930 | break; |
c4307285 | 931 | } |
f25dcc76 AV |
932 | if (rc == -EMSGSIZE) { |
933 | m->msg_iter = save; | |
e2dafe87 | 934 | goto new_mtu; |
f25dcc76 | 935 | } |
e2dafe87 | 936 | if (rc != -ELINKCONG) |
0c3141e9 | 937 | break; |
50100a5e | 938 | tsk->link_cong = 1; |
e2dafe87 | 939 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 940 | if (rc) |
94153e36 | 941 | __skb_queue_purge(pktchain); |
e2dafe87 | 942 | } while (!rc); |
e2dafe87 JPM |
943 | |
944 | return rc; | |
b97bf3fd PL |
945 | } |
946 | ||
391a6dd1 YX |
947 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
948 | { | |
949 | struct sock *sk = sock->sk; | |
58ed9442 | 950 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
951 | DEFINE_WAIT(wait); |
952 | int done; | |
953 | ||
954 | do { | |
955 | int err = sock_error(sk); | |
956 | if (err) | |
957 | return err; | |
958 | if (sock->state == SS_DISCONNECTING) | |
959 | return -EPIPE; | |
960 | else if (sock->state != SS_CONNECTED) | |
961 | return -ENOTCONN; | |
962 | if (!*timeo_p) | |
963 | return -EAGAIN; | |
964 | if (signal_pending(current)) | |
965 | return sock_intr_errno(*timeo_p); | |
966 | ||
967 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
968 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 969 | (!tsk->link_cong && |
301bae56 JPM |
970 | !tsk_conn_cong(tsk)) || |
971 | !tsk->connected); | |
391a6dd1 YX |
972 | finish_wait(sk_sleep(sk), &wait); |
973 | } while (!done); | |
974 | return 0; | |
975 | } | |
976 | ||
c4307285 | 977 | /** |
4ccfe5e0 | 978 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 979 | * @sock: socket structure |
4ccfe5e0 JPM |
980 | * @m: data to send |
981 | * @dsz: total length of data to be transmitted | |
c4307285 | 982 | * |
4ccfe5e0 | 983 | * Used for SOCK_STREAM data. |
c4307285 | 984 | * |
4ccfe5e0 JPM |
985 | * Returns the number of bytes sent on success (or partial success), |
986 | * or errno if no data sent | |
b97bf3fd | 987 | */ |
1b784140 | 988 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
989 | { |
990 | struct sock *sk = sock->sk; | |
991 | int ret; | |
992 | ||
993 | lock_sock(sk); | |
994 | ret = __tipc_send_stream(sock, m, dsz); | |
995 | release_sock(sk); | |
996 | ||
997 | return ret; | |
998 | } | |
999 | ||
1000 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1001 | { |
0c3141e9 | 1002 | struct sock *sk = sock->sk; |
f2f9800d | 1003 | struct net *net = sock_net(sk); |
58ed9442 | 1004 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1005 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 1006 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
342dfc30 | 1007 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1008 | u32 portid = tsk->portid; |
4ccfe5e0 | 1009 | int rc = -EINVAL; |
391a6dd1 | 1010 | long timeo; |
4ccfe5e0 JPM |
1011 | u32 dnode; |
1012 | uint mtu, send, sent = 0; | |
f25dcc76 | 1013 | struct iov_iter save; |
b97bf3fd PL |
1014 | |
1015 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1016 | if (unlikely(dest)) { |
39a0295f | 1017 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1018 | if (dsz && (dsz == rc)) |
60120526 | 1019 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1020 | return rc; |
1021 | } | |
1022 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1023 | return -EMSGSIZE; |
1024 | ||
391a6dd1 YX |
1025 | if (unlikely(sock->state != SS_CONNECTED)) { |
1026 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1027 | return -EPIPE; |
391a6dd1 | 1028 | else |
39a0295f | 1029 | return -ENOTCONN; |
391a6dd1 | 1030 | } |
1d835874 | 1031 | |
391a6dd1 | 1032 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1033 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1034 | |
1035 | next: | |
f25dcc76 | 1036 | save = m->msg_iter; |
301bae56 | 1037 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1038 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
94153e36 | 1039 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
4ccfe5e0 | 1040 | if (unlikely(rc < 0)) |
39a0295f | 1041 | return rc; |
c4307285 | 1042 | do { |
301bae56 | 1043 | if (likely(!tsk_conn_cong(tsk))) { |
94153e36 | 1044 | rc = tipc_link_xmit(net, pktchain, dnode, portid); |
4ccfe5e0 | 1045 | if (likely(!rc)) { |
60120526 | 1046 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1047 | sent += send; |
1048 | if (sent == dsz) | |
1049 | break; | |
1050 | goto next; | |
1051 | } | |
1052 | if (rc == -EMSGSIZE) { | |
f2f9800d YX |
1053 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1054 | portid); | |
f25dcc76 | 1055 | m->msg_iter = save; |
4ccfe5e0 JPM |
1056 | goto next; |
1057 | } | |
1058 | if (rc != -ELINKCONG) | |
1059 | break; | |
50100a5e | 1060 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1061 | } |
1062 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1063 | if (rc) |
94153e36 | 1064 | __skb_queue_purge(pktchain); |
4ccfe5e0 | 1065 | } while (!rc); |
39a0295f | 1066 | |
4ccfe5e0 | 1067 | return sent ? sent : rc; |
b97bf3fd PL |
1068 | } |
1069 | ||
c4307285 | 1070 | /** |
4ccfe5e0 | 1071 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1072 | * @sock: socket structure |
4ccfe5e0 JPM |
1073 | * @m: message to send |
1074 | * @dsz: length of data to be transmitted | |
c4307285 | 1075 | * |
4ccfe5e0 | 1076 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1077 | * |
4ccfe5e0 | 1078 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1079 | */ |
1b784140 | 1080 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1081 | { |
4ccfe5e0 JPM |
1082 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1083 | return -EMSGSIZE; | |
b97bf3fd | 1084 | |
1b784140 | 1085 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1086 | } |
1087 | ||
dadebc00 | 1088 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1089 | */ |
301bae56 | 1090 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1091 | u32 peer_node) |
b97bf3fd | 1092 | { |
3721e9c7 YX |
1093 | struct sock *sk = &tsk->sk; |
1094 | struct net *net = sock_net(sk); | |
301bae56 | 1095 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1096 | |
dadebc00 JPM |
1097 | msg_set_destnode(msg, peer_node); |
1098 | msg_set_destport(msg, peer_port); | |
1099 | msg_set_type(msg, TIPC_CONN_MSG); | |
1100 | msg_set_lookup_scope(msg, 0); | |
1101 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1102 | |
2f55c437 | 1103 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1104 | tsk->probing_state = TIPC_CONN_OK; |
1105 | tsk->connected = 1; | |
3721e9c7 | 1106 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1107 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1108 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1109 | } |
1110 | ||
1111 | /** | |
1112 | * set_orig_addr - capture sender's address for received message | |
1113 | * @m: descriptor for message info | |
1114 | * @msg: received message header | |
c4307285 | 1115 | * |
b97bf3fd PL |
1116 | * Note: Address is not captured if not requested by receiver. |
1117 | */ | |
05790c64 | 1118 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1119 | { |
342dfc30 | 1120 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1121 | |
c4307285 | 1122 | if (addr) { |
b97bf3fd PL |
1123 | addr->family = AF_TIPC; |
1124 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1125 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1126 | addr->addr.id.ref = msg_origport(msg); |
1127 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1128 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1129 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1130 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1131 | } | |
1132 | } | |
1133 | ||
1134 | /** | |
301bae56 | 1135 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1136 | * @m: descriptor for message info |
1137 | * @msg: received message header | |
301bae56 | 1138 | * @tsk: TIPC port associated with message |
c4307285 | 1139 | * |
b97bf3fd | 1140 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1141 | * |
b97bf3fd PL |
1142 | * Returns 0 if successful, otherwise errno |
1143 | */ | |
301bae56 JPM |
1144 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1145 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1146 | { |
1147 | u32 anc_data[3]; | |
1148 | u32 err; | |
1149 | u32 dest_type; | |
3546c750 | 1150 | int has_name; |
b97bf3fd PL |
1151 | int res; |
1152 | ||
1153 | if (likely(m->msg_controllen == 0)) | |
1154 | return 0; | |
1155 | ||
1156 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1157 | err = msg ? msg_errcode(msg) : 0; |
1158 | if (unlikely(err)) { | |
1159 | anc_data[0] = err; | |
1160 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1161 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1162 | if (res) | |
b97bf3fd | 1163 | return res; |
2db9983a AS |
1164 | if (anc_data[1]) { |
1165 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1166 | msg_data(msg)); | |
1167 | if (res) | |
1168 | return res; | |
1169 | } | |
b97bf3fd PL |
1170 | } |
1171 | ||
1172 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1173 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1174 | switch (dest_type) { | |
1175 | case TIPC_NAMED_MSG: | |
3546c750 | 1176 | has_name = 1; |
b97bf3fd PL |
1177 | anc_data[0] = msg_nametype(msg); |
1178 | anc_data[1] = msg_namelower(msg); | |
1179 | anc_data[2] = msg_namelower(msg); | |
1180 | break; | |
1181 | case TIPC_MCAST_MSG: | |
3546c750 | 1182 | has_name = 1; |
b97bf3fd PL |
1183 | anc_data[0] = msg_nametype(msg); |
1184 | anc_data[1] = msg_namelower(msg); | |
1185 | anc_data[2] = msg_nameupper(msg); | |
1186 | break; | |
1187 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1188 | has_name = (tsk->conn_type != 0); |
1189 | anc_data[0] = tsk->conn_type; | |
1190 | anc_data[1] = tsk->conn_instance; | |
1191 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1192 | break; |
1193 | default: | |
3546c750 | 1194 | has_name = 0; |
b97bf3fd | 1195 | } |
2db9983a AS |
1196 | if (has_name) { |
1197 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1198 | if (res) | |
1199 | return res; | |
1200 | } | |
b97bf3fd PL |
1201 | |
1202 | return 0; | |
1203 | } | |
1204 | ||
301bae56 | 1205 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1206 | { |
f2f9800d | 1207 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1208 | struct sk_buff *skb = NULL; |
739f5e4e | 1209 | struct tipc_msg *msg; |
301bae56 JPM |
1210 | u32 peer_port = tsk_peer_port(tsk); |
1211 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1212 | |
301bae56 | 1213 | if (!tsk->connected) |
739f5e4e | 1214 | return; |
c5898636 JPM |
1215 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1216 | dnode, tsk_own_node(tsk), peer_port, | |
1217 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1218 | if (!skb) |
739f5e4e | 1219 | return; |
a6ca1094 | 1220 | msg = buf_msg(skb); |
739f5e4e | 1221 | msg_set_msgcnt(msg, ack); |
f2f9800d | 1222 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1223 | } |
1224 | ||
85d3fc94 | 1225 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1226 | { |
1227 | struct sock *sk = sock->sk; | |
1228 | DEFINE_WAIT(wait); | |
85d3fc94 | 1229 | long timeo = *timeop; |
9bbb4ecc YX |
1230 | int err; |
1231 | ||
1232 | for (;;) { | |
1233 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1234 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1235 | if (sock->state == SS_DISCONNECTING) { |
1236 | err = -ENOTCONN; | |
1237 | break; | |
1238 | } | |
1239 | release_sock(sk); | |
1240 | timeo = schedule_timeout(timeo); | |
1241 | lock_sock(sk); | |
1242 | } | |
1243 | err = 0; | |
1244 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1245 | break; | |
9bbb4ecc YX |
1246 | err = -EAGAIN; |
1247 | if (!timeo) | |
1248 | break; | |
143fe22f EH |
1249 | err = sock_intr_errno(timeo); |
1250 | if (signal_pending(current)) | |
1251 | break; | |
9bbb4ecc YX |
1252 | } |
1253 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1254 | *timeop = timeo; |
9bbb4ecc YX |
1255 | return err; |
1256 | } | |
1257 | ||
c4307285 | 1258 | /** |
247f0f3c | 1259 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1260 | * @m: descriptor for message info |
1261 | * @buf_len: total size of user buffer area | |
1262 | * @flags: receive flags | |
c4307285 | 1263 | * |
b97bf3fd PL |
1264 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1265 | * If the complete message doesn't fit in user area, truncate it. | |
1266 | * | |
1267 | * Returns size of returned message data, errno otherwise | |
1268 | */ | |
1b784140 YX |
1269 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1270 | int flags) | |
b97bf3fd | 1271 | { |
0c3141e9 | 1272 | struct sock *sk = sock->sk; |
58ed9442 | 1273 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1274 | struct sk_buff *buf; |
1275 | struct tipc_msg *msg; | |
9bbb4ecc | 1276 | long timeo; |
b97bf3fd PL |
1277 | unsigned int sz; |
1278 | u32 err; | |
1279 | int res; | |
1280 | ||
0c3141e9 | 1281 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1282 | if (unlikely(!buf_len)) |
1283 | return -EINVAL; | |
1284 | ||
0c3141e9 | 1285 | lock_sock(sk); |
b97bf3fd | 1286 | |
0c3141e9 AS |
1287 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1288 | res = -ENOTCONN; | |
b97bf3fd PL |
1289 | goto exit; |
1290 | } | |
1291 | ||
9bbb4ecc | 1292 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1293 | restart: |
b97bf3fd | 1294 | |
0c3141e9 | 1295 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1296 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1297 | if (res) |
1298 | goto exit; | |
b97bf3fd | 1299 | |
0c3141e9 | 1300 | /* Look at first message in receive queue */ |
0c3141e9 | 1301 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1302 | msg = buf_msg(buf); |
1303 | sz = msg_data_sz(msg); | |
1304 | err = msg_errcode(msg); | |
1305 | ||
b97bf3fd | 1306 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1307 | if ((!sz) && (!err)) { |
2e84c60b | 1308 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1309 | goto restart; |
1310 | } | |
1311 | ||
1312 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1313 | set_orig_addr(m, msg); |
1314 | ||
1315 | /* Capture ancillary data (optional) */ | |
301bae56 | 1316 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1317 | if (res) |
b97bf3fd PL |
1318 | goto exit; |
1319 | ||
1320 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1321 | if (!err) { |
1322 | if (unlikely(buf_len < sz)) { | |
1323 | sz = buf_len; | |
1324 | m->msg_flags |= MSG_TRUNC; | |
1325 | } | |
51f3d02b | 1326 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1327 | if (res) |
b97bf3fd | 1328 | goto exit; |
b97bf3fd PL |
1329 | res = sz; |
1330 | } else { | |
1331 | if ((sock->state == SS_READY) || | |
1332 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1333 | res = 0; | |
1334 | else | |
1335 | res = -ECONNRESET; | |
1336 | } | |
1337 | ||
1338 | /* Consume received message (optional) */ | |
b97bf3fd | 1339 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1340 | if ((sock->state != SS_READY) && |
60120526 | 1341 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1342 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1343 | tsk->rcv_unacked = 0; |
1344 | } | |
2e84c60b | 1345 | tsk_advance_rx_queue(sk); |
c4307285 | 1346 | } |
b97bf3fd | 1347 | exit: |
0c3141e9 | 1348 | release_sock(sk); |
b97bf3fd PL |
1349 | return res; |
1350 | } | |
1351 | ||
c4307285 | 1352 | /** |
247f0f3c | 1353 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1354 | * @m: descriptor for message info |
1355 | * @buf_len: total size of user buffer area | |
1356 | * @flags: receive flags | |
c4307285 YH |
1357 | * |
1358 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1359 | * will optionally wait for more; never truncates data. |
1360 | * | |
1361 | * Returns size of returned message data, errno otherwise | |
1362 | */ | |
1b784140 YX |
1363 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1364 | size_t buf_len, int flags) | |
b97bf3fd | 1365 | { |
0c3141e9 | 1366 | struct sock *sk = sock->sk; |
58ed9442 | 1367 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1368 | struct sk_buff *buf; |
1369 | struct tipc_msg *msg; | |
9bbb4ecc | 1370 | long timeo; |
b97bf3fd | 1371 | unsigned int sz; |
3720d40b | 1372 | int sz_to_copy, target, needed; |
b97bf3fd | 1373 | int sz_copied = 0; |
b97bf3fd | 1374 | u32 err; |
0c3141e9 | 1375 | int res = 0; |
b97bf3fd | 1376 | |
0c3141e9 | 1377 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1378 | if (unlikely(!buf_len)) |
1379 | return -EINVAL; | |
1380 | ||
0c3141e9 | 1381 | lock_sock(sk); |
b97bf3fd | 1382 | |
9bbb4ecc | 1383 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1384 | res = -ENOTCONN; |
b97bf3fd PL |
1385 | goto exit; |
1386 | } | |
1387 | ||
3720d40b | 1388 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1389 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1390 | |
617d3c7a | 1391 | restart: |
0c3141e9 | 1392 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1393 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1394 | if (res) |
1395 | goto exit; | |
b97bf3fd | 1396 | |
0c3141e9 | 1397 | /* Look at first message in receive queue */ |
0c3141e9 | 1398 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1399 | msg = buf_msg(buf); |
1400 | sz = msg_data_sz(msg); | |
1401 | err = msg_errcode(msg); | |
1402 | ||
1403 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1404 | if ((!sz) && (!err)) { |
2e84c60b | 1405 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1406 | goto restart; |
1407 | } | |
1408 | ||
1409 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1410 | if (sz_copied == 0) { |
1411 | set_orig_addr(m, msg); | |
301bae56 | 1412 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1413 | if (res) |
b97bf3fd PL |
1414 | goto exit; |
1415 | } | |
1416 | ||
1417 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1418 | if (!err) { |
0232fd0a | 1419 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1420 | |
0232fd0a | 1421 | sz -= offset; |
b97bf3fd PL |
1422 | needed = (buf_len - sz_copied); |
1423 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1424 | |
51f3d02b DM |
1425 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1426 | m, sz_to_copy); | |
0232fd0a | 1427 | if (res) |
b97bf3fd | 1428 | goto exit; |
0232fd0a | 1429 | |
b97bf3fd PL |
1430 | sz_copied += sz_to_copy; |
1431 | ||
1432 | if (sz_to_copy < sz) { | |
1433 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1434 | TIPC_SKB_CB(buf)->handle = |
1435 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1436 | goto exit; |
1437 | } | |
b97bf3fd PL |
1438 | } else { |
1439 | if (sz_copied != 0) | |
1440 | goto exit; /* can't add error msg to valid data */ | |
1441 | ||
1442 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1443 | res = 0; | |
1444 | else | |
1445 | res = -ECONNRESET; | |
1446 | } | |
1447 | ||
1448 | /* Consume received message (optional) */ | |
b97bf3fd | 1449 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1450 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1451 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1452 | tsk->rcv_unacked = 0; |
1453 | } | |
2e84c60b | 1454 | tsk_advance_rx_queue(sk); |
c4307285 | 1455 | } |
b97bf3fd PL |
1456 | |
1457 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1458 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1459 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1460 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1461 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1462 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1463 | goto restart; |
1464 | ||
1465 | exit: | |
0c3141e9 | 1466 | release_sock(sk); |
a3b0a5a9 | 1467 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1468 | } |
1469 | ||
f288bef4 YX |
1470 | /** |
1471 | * tipc_write_space - wake up thread if port congestion is released | |
1472 | * @sk: socket | |
1473 | */ | |
1474 | static void tipc_write_space(struct sock *sk) | |
1475 | { | |
1476 | struct socket_wq *wq; | |
1477 | ||
1478 | rcu_read_lock(); | |
1479 | wq = rcu_dereference(sk->sk_wq); | |
1480 | if (wq_has_sleeper(wq)) | |
1481 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1482 | POLLWRNORM | POLLWRBAND); | |
1483 | rcu_read_unlock(); | |
1484 | } | |
1485 | ||
1486 | /** | |
1487 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1488 | * @sk: socket | |
1489 | * @len: the length of messages | |
1490 | */ | |
676d2369 | 1491 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1492 | { |
1493 | struct socket_wq *wq; | |
1494 | ||
1495 | rcu_read_lock(); | |
1496 | wq = rcu_dereference(sk->sk_wq); | |
1497 | if (wq_has_sleeper(wq)) | |
1498 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1499 | POLLRDNORM | POLLRDBAND); | |
1500 | rcu_read_unlock(); | |
1501 | } | |
1502 | ||
7e6c131e YX |
1503 | /** |
1504 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1505 | * @tsk: TIPC socket |
1186adf7 | 1506 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1507 | * |
b2ad5e5f | 1508 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1509 | */ |
1186adf7 | 1510 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb) |
7e6c131e | 1511 | { |
58ed9442 | 1512 | struct sock *sk = &tsk->sk; |
f2f9800d | 1513 | struct net *net = sock_net(sk); |
8826cde6 | 1514 | struct socket *sock = sk->sk_socket; |
1186adf7 | 1515 | struct tipc_msg *msg = buf_msg(*skb); |
e4de5fab | 1516 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1517 | |
1518 | if (msg_mcast(msg)) | |
1519 | return retval; | |
1520 | ||
1521 | switch ((int)sock->state) { | |
1522 | case SS_CONNECTED: | |
1523 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1524 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1525 | if (unlikely(msg_errcode(msg))) { |
1526 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1527 | tsk->connected = 0; |
dadebc00 | 1528 | /* let timer expire on it's own */ |
f2f9800d | 1529 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
07f6c4bc | 1530 | tsk->portid); |
7e6c131e YX |
1531 | } |
1532 | retval = TIPC_OK; | |
1533 | } | |
1534 | break; | |
1535 | case SS_CONNECTING: | |
1536 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1537 | |
1538 | if (unlikely(!msg_connected(msg))) | |
1539 | break; | |
1540 | ||
584d24b3 YX |
1541 | if (unlikely(msg_errcode(msg))) { |
1542 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1543 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1544 | retval = TIPC_OK; |
1545 | break; | |
1546 | } | |
1547 | ||
dadebc00 | 1548 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1549 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1550 | sk->sk_err = EINVAL; |
7e6c131e | 1551 | retval = TIPC_OK; |
584d24b3 YX |
1552 | break; |
1553 | } | |
1554 | ||
301bae56 JPM |
1555 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1556 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1557 | sock->state = SS_CONNECTED; |
1558 | ||
584d24b3 YX |
1559 | /* If an incoming message is an 'ACK-', it should be |
1560 | * discarded here because it doesn't contain useful | |
1561 | * data. In addition, we should try to wake up | |
1562 | * connect() routine if sleeping. | |
1563 | */ | |
1564 | if (msg_data_sz(msg) == 0) { | |
1186adf7 JPM |
1565 | kfree_skb(*skb); |
1566 | *skb = NULL; | |
584d24b3 YX |
1567 | if (waitqueue_active(sk_sleep(sk))) |
1568 | wake_up_interruptible(sk_sleep(sk)); | |
1569 | } | |
1570 | retval = TIPC_OK; | |
7e6c131e YX |
1571 | break; |
1572 | case SS_LISTENING: | |
1573 | case SS_UNCONNECTED: | |
1574 | /* Accept only SYN message */ | |
1575 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1576 | retval = TIPC_OK; | |
1577 | break; | |
1578 | case SS_DISCONNECTING: | |
1579 | break; | |
1580 | default: | |
1581 | pr_err("Unknown socket state %u\n", sock->state); | |
1582 | } | |
1583 | return retval; | |
1584 | } | |
1585 | ||
aba79f33 YX |
1586 | /** |
1587 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1588 | * @sk: socket | |
1589 | * @buf: message | |
1590 | * | |
1591 | * For all connection oriented messages, irrespective of importance, | |
1592 | * the default overload value (i.e. 67MB) is set as limit. | |
1593 | * | |
1594 | * For all connectionless messages, by default new queue limits are | |
1595 | * as belows: | |
1596 | * | |
cc79dd1b YX |
1597 | * TIPC_LOW_IMPORTANCE (4 MB) |
1598 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1599 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1600 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1601 | * |
1602 | * Returns overload limit according to corresponding message importance | |
1603 | */ | |
1604 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1605 | { | |
1606 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1607 | |
1608 | if (msg_connected(msg)) | |
0cee6bbe | 1609 | return sysctl_tipc_rmem[2]; |
1610 | ||
1611 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1612 | msg_importance(msg); | |
aba79f33 YX |
1613 | } |
1614 | ||
c4307285 | 1615 | /** |
0c3141e9 AS |
1616 | * filter_rcv - validate incoming message |
1617 | * @sk: socket | |
1186adf7 | 1618 | * @skb: pointer to message. Set to NULL if buffer is consumed. |
c4307285 | 1619 | * |
0c3141e9 AS |
1620 | * Enqueues message on receive queue if acceptable; optionally handles |
1621 | * disconnect indication for a connected socket. | |
1622 | * | |
1186adf7 | 1623 | * Called with socket lock already taken |
c4307285 | 1624 | * |
1186adf7 | 1625 | * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected |
b97bf3fd | 1626 | */ |
1186adf7 | 1627 | static int filter_rcv(struct sock *sk, struct sk_buff **skb) |
b97bf3fd | 1628 | { |
0c3141e9 | 1629 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1630 | struct tipc_sock *tsk = tipc_sk(sk); |
1186adf7 JPM |
1631 | struct tipc_msg *msg = buf_msg(*skb); |
1632 | unsigned int limit = rcvbuf_limit(sk, *skb); | |
e4de5fab | 1633 | int rc = TIPC_OK; |
b97bf3fd | 1634 | |
1186adf7 JPM |
1635 | if (unlikely(msg_user(msg) == CONN_MANAGER)) { |
1636 | tipc_sk_proto_rcv(tsk, skb); | |
1637 | return TIPC_OK; | |
1638 | } | |
ec8a2e56 | 1639 | |
50100a5e | 1640 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1186adf7 | 1641 | kfree_skb(*skb); |
50100a5e JPM |
1642 | tsk->link_cong = 0; |
1643 | sk->sk_write_space(sk); | |
1186adf7 | 1644 | *skb = NULL; |
50100a5e JPM |
1645 | return TIPC_OK; |
1646 | } | |
1647 | ||
b97bf3fd | 1648 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1649 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1650 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1651 | |
b97bf3fd | 1652 | if (sock->state == SS_READY) { |
b29f1428 | 1653 | if (msg_connected(msg)) |
e4de5fab | 1654 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1655 | } else { |
1186adf7 JPM |
1656 | rc = filter_connect(tsk, skb); |
1657 | if (rc != TIPC_OK || !*skb) | |
e4de5fab | 1658 | return rc; |
b97bf3fd PL |
1659 | } |
1660 | ||
1661 | /* Reject message if there isn't room to queue it */ | |
1186adf7 | 1662 | if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit) |
e4de5fab | 1663 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1664 | |
aba79f33 | 1665 | /* Enqueue message */ |
1186adf7 JPM |
1666 | TIPC_SKB_CB(*skb)->handle = NULL; |
1667 | __skb_queue_tail(&sk->sk_receive_queue, *skb); | |
1668 | skb_set_owner_r(*skb, sk); | |
0c3141e9 | 1669 | |
676d2369 | 1670 | sk->sk_data_ready(sk); |
1186adf7 | 1671 | *skb = NULL; |
0c3141e9 AS |
1672 | return TIPC_OK; |
1673 | } | |
b97bf3fd | 1674 | |
0c3141e9 | 1675 | /** |
4f4482dc | 1676 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1677 | * @sk: socket |
a6ca1094 | 1678 | * @skb: message |
0c3141e9 | 1679 | * |
e3a77561 | 1680 | * Caller must hold socket lock |
0c3141e9 AS |
1681 | * |
1682 | * Returns 0 | |
1683 | */ | |
a6ca1094 | 1684 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1685 | { |
1186adf7 JPM |
1686 | int err; |
1687 | atomic_t *dcnt; | |
1688 | u32 dnode; | |
4f4482dc | 1689 | struct tipc_sock *tsk = tipc_sk(sk); |
34747539 | 1690 | struct net *net = sock_net(sk); |
a6ca1094 | 1691 | uint truesize = skb->truesize; |
0c3141e9 | 1692 | |
1186adf7 JPM |
1693 | err = filter_rcv(sk, &skb); |
1694 | if (likely(!skb)) { | |
1695 | dcnt = &tsk->dupl_rcvcnt; | |
1696 | if (atomic_read(dcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1697 | atomic_add(truesize, dcnt); | |
ac0074ee JPM |
1698 | return 0; |
1699 | } | |
1186adf7 JPM |
1700 | if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err)) |
1701 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); | |
0c3141e9 AS |
1702 | return 0; |
1703 | } | |
1704 | ||
d570d864 | 1705 | /** |
c637c103 JPM |
1706 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1707 | * inputq and try adding them to socket or backlog queue | |
1708 | * @inputq: list of incoming buffers with potentially different destinations | |
1709 | * @sk: socket where the buffers should be enqueued | |
1710 | * @dport: port number for the socket | |
1711 | * @_skb: returned buffer to be forwarded or rejected, if applicable | |
d570d864 JPM |
1712 | * |
1713 | * Caller must hold socket lock | |
1714 | * | |
c637c103 JPM |
1715 | * Returns TIPC_OK if all buffers enqueued, otherwise -TIPC_ERR_OVERLOAD |
1716 | * or -TIPC_ERR_NO_PORT | |
d570d864 | 1717 | */ |
c637c103 JPM |
1718 | static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1719 | u32 dport, struct sk_buff **_skb) | |
d570d864 JPM |
1720 | { |
1721 | unsigned int lim; | |
1722 | atomic_t *dcnt; | |
c637c103 JPM |
1723 | int err; |
1724 | struct sk_buff *skb; | |
1725 | unsigned long time_limit = jiffies + 2; | |
1726 | ||
1727 | while (skb_queue_len(inputq)) { | |
51a00daf JPM |
1728 | if (unlikely(time_after_eq(jiffies, time_limit))) |
1729 | return TIPC_OK; | |
c637c103 JPM |
1730 | skb = tipc_skb_dequeue(inputq, dport); |
1731 | if (unlikely(!skb)) | |
1732 | return TIPC_OK; | |
c637c103 JPM |
1733 | if (!sock_owned_by_user(sk)) { |
1734 | err = filter_rcv(sk, &skb); | |
1735 | if (likely(!skb)) | |
1736 | continue; | |
1737 | *_skb = skb; | |
1738 | return err; | |
1739 | } | |
1740 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
1741 | if (sk->sk_backlog.len) | |
1742 | atomic_set(dcnt, 0); | |
1743 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1744 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1745 | continue; | |
1746 | *_skb = skb; | |
d570d864 | 1747 | return -TIPC_ERR_OVERLOAD; |
c637c103 | 1748 | } |
d570d864 JPM |
1749 | return TIPC_OK; |
1750 | } | |
1751 | ||
0c3141e9 | 1752 | /** |
c637c103 JPM |
1753 | * tipc_sk_rcv - handle a chain of incoming buffers |
1754 | * @inputq: buffer list containing the buffers | |
1755 | * Consumes all buffers in list until inputq is empty | |
1756 | * Note: may be called in multiple threads referring to the same queue | |
1757 | * Returns 0 if last buffer was accepted, otherwise -EHOSTUNREACH | |
1758 | * Only node local calls check the return value, sending single-buffer queues | |
0c3141e9 | 1759 | */ |
c637c103 | 1760 | int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1761 | { |
c637c103 JPM |
1762 | u32 dnode, dport = 0; |
1763 | int err = -TIPC_ERR_NO_PORT; | |
1764 | struct sk_buff *skb; | |
9816f061 | 1765 | struct tipc_sock *tsk; |
c5898636 | 1766 | struct tipc_net *tn; |
9816f061 | 1767 | struct sock *sk; |
9816f061 | 1768 | |
c637c103 JPM |
1769 | while (skb_queue_len(inputq)) { |
1770 | skb = NULL; | |
1771 | dport = tipc_skb_peek_port(inputq, dport); | |
1772 | tsk = tipc_sk_lookup(net, dport); | |
1773 | if (likely(tsk)) { | |
1774 | sk = &tsk->sk; | |
1775 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
1776 | err = tipc_sk_enqueue(inputq, sk, dport, &skb); | |
1777 | spin_unlock_bh(&sk->sk_lock.slock); | |
1778 | dport = 0; | |
1779 | } | |
1780 | sock_put(sk); | |
1781 | } else { | |
1782 | skb = tipc_skb_dequeue(inputq, dport); | |
1783 | } | |
1784 | if (likely(!skb)) | |
1785 | continue; | |
1786 | if (tipc_msg_lookup_dest(net, skb, &dnode, &err)) | |
1787 | goto xmit; | |
1788 | if (!err) { | |
1789 | dnode = msg_destnode(buf_msg(skb)); | |
1790 | goto xmit; | |
1791 | } | |
1792 | tn = net_generic(net, tipc_net_id); | |
1793 | if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err)) | |
1794 | continue; | |
e3a77561 | 1795 | xmit: |
c637c103 JPM |
1796 | tipc_link_xmit_skb(net, skb, dnode, dport); |
1797 | } | |
1186adf7 | 1798 | return err ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1799 | } |
1800 | ||
78eb3a53 YX |
1801 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1802 | { | |
1803 | struct sock *sk = sock->sk; | |
1804 | DEFINE_WAIT(wait); | |
1805 | int done; | |
1806 | ||
1807 | do { | |
1808 | int err = sock_error(sk); | |
1809 | if (err) | |
1810 | return err; | |
1811 | if (!*timeo_p) | |
1812 | return -ETIMEDOUT; | |
1813 | if (signal_pending(current)) | |
1814 | return sock_intr_errno(*timeo_p); | |
1815 | ||
1816 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1817 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1818 | finish_wait(sk_sleep(sk), &wait); | |
1819 | } while (!done); | |
1820 | return 0; | |
1821 | } | |
1822 | ||
b97bf3fd | 1823 | /** |
247f0f3c | 1824 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1825 | * @sock: socket structure |
1826 | * @dest: socket address for destination port | |
1827 | * @destlen: size of socket address data structure | |
0c3141e9 | 1828 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1829 | * |
1830 | * Returns 0 on success, errno otherwise | |
1831 | */ | |
247f0f3c YX |
1832 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1833 | int destlen, int flags) | |
b97bf3fd | 1834 | { |
0c3141e9 | 1835 | struct sock *sk = sock->sk; |
b89741a0 AS |
1836 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1837 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1838 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1839 | socket_state previous; | |
b89741a0 AS |
1840 | int res; |
1841 | ||
0c3141e9 AS |
1842 | lock_sock(sk); |
1843 | ||
b89741a0 | 1844 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1845 | if (sock->state == SS_READY) { |
1846 | res = -EOPNOTSUPP; | |
1847 | goto exit; | |
1848 | } | |
b89741a0 | 1849 | |
b89741a0 AS |
1850 | /* |
1851 | * Reject connection attempt using multicast address | |
1852 | * | |
1853 | * Note: send_msg() validates the rest of the address fields, | |
1854 | * so there's no need to do it here | |
1855 | */ | |
0c3141e9 AS |
1856 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1857 | res = -EINVAL; | |
1858 | goto exit; | |
1859 | } | |
1860 | ||
78eb3a53 | 1861 | previous = sock->state; |
584d24b3 YX |
1862 | switch (sock->state) { |
1863 | case SS_UNCONNECTED: | |
1864 | /* Send a 'SYN-' to destination */ | |
1865 | m.msg_name = dest; | |
1866 | m.msg_namelen = destlen; | |
1867 | ||
1868 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1869 | * indicate send_msg() is never blocked. | |
1870 | */ | |
1871 | if (!timeout) | |
1872 | m.msg_flags = MSG_DONTWAIT; | |
1873 | ||
39a0295f | 1874 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1875 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1876 | goto exit; | |
1877 | ||
1878 | /* Just entered SS_CONNECTING state; the only | |
1879 | * difference is that return value in non-blocking | |
1880 | * case is EINPROGRESS, rather than EALREADY. | |
1881 | */ | |
1882 | res = -EINPROGRESS; | |
584d24b3 | 1883 | case SS_CONNECTING: |
78eb3a53 YX |
1884 | if (previous == SS_CONNECTING) |
1885 | res = -EALREADY; | |
1886 | if (!timeout) | |
1887 | goto exit; | |
1888 | timeout = msecs_to_jiffies(timeout); | |
1889 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1890 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1891 | break; |
1892 | case SS_CONNECTED: | |
1893 | res = -EISCONN; | |
1894 | break; | |
1895 | default: | |
1896 | res = -EINVAL; | |
78eb3a53 | 1897 | break; |
b89741a0 | 1898 | } |
0c3141e9 AS |
1899 | exit: |
1900 | release_sock(sk); | |
b89741a0 | 1901 | return res; |
b97bf3fd PL |
1902 | } |
1903 | ||
c4307285 | 1904 | /** |
247f0f3c | 1905 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1906 | * @sock: socket structure |
1907 | * @len: (unused) | |
c4307285 | 1908 | * |
b97bf3fd PL |
1909 | * Returns 0 on success, errno otherwise |
1910 | */ | |
247f0f3c | 1911 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1912 | { |
0c3141e9 AS |
1913 | struct sock *sk = sock->sk; |
1914 | int res; | |
1915 | ||
1916 | lock_sock(sk); | |
b97bf3fd | 1917 | |
245f3d34 | 1918 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1919 | res = -EINVAL; |
1920 | else { | |
1921 | sock->state = SS_LISTENING; | |
1922 | res = 0; | |
1923 | } | |
1924 | ||
1925 | release_sock(sk); | |
1926 | return res; | |
b97bf3fd PL |
1927 | } |
1928 | ||
6398e23c YX |
1929 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1930 | { | |
1931 | struct sock *sk = sock->sk; | |
1932 | DEFINE_WAIT(wait); | |
1933 | int err; | |
1934 | ||
1935 | /* True wake-one mechanism for incoming connections: only | |
1936 | * one process gets woken up, not the 'whole herd'. | |
1937 | * Since we do not 'race & poll' for established sockets | |
1938 | * anymore, the common case will execute the loop only once. | |
1939 | */ | |
1940 | for (;;) { | |
1941 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1942 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1943 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1944 | release_sock(sk); |
1945 | timeo = schedule_timeout(timeo); | |
1946 | lock_sock(sk); | |
1947 | } | |
1948 | err = 0; | |
1949 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1950 | break; | |
1951 | err = -EINVAL; | |
1952 | if (sock->state != SS_LISTENING) | |
1953 | break; | |
6398e23c YX |
1954 | err = -EAGAIN; |
1955 | if (!timeo) | |
1956 | break; | |
143fe22f EH |
1957 | err = sock_intr_errno(timeo); |
1958 | if (signal_pending(current)) | |
1959 | break; | |
6398e23c YX |
1960 | } |
1961 | finish_wait(sk_sleep(sk), &wait); | |
1962 | return err; | |
1963 | } | |
1964 | ||
c4307285 | 1965 | /** |
247f0f3c | 1966 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1967 | * @sock: listening socket |
1968 | * @newsock: new socket that is to be connected | |
1969 | * @flags: file-related flags associated with socket | |
c4307285 | 1970 | * |
b97bf3fd PL |
1971 | * Returns 0 on success, errno otherwise |
1972 | */ | |
247f0f3c | 1973 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1974 | { |
0fef8f20 | 1975 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1976 | struct sk_buff *buf; |
301bae56 | 1977 | struct tipc_sock *new_tsock; |
0fef8f20 | 1978 | struct tipc_msg *msg; |
6398e23c | 1979 | long timeo; |
0c3141e9 | 1980 | int res; |
b97bf3fd | 1981 | |
0c3141e9 | 1982 | lock_sock(sk); |
b97bf3fd | 1983 | |
0c3141e9 AS |
1984 | if (sock->state != SS_LISTENING) { |
1985 | res = -EINVAL; | |
b97bf3fd PL |
1986 | goto exit; |
1987 | } | |
6398e23c YX |
1988 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1989 | res = tipc_wait_for_accept(sock, timeo); | |
1990 | if (res) | |
1991 | goto exit; | |
0c3141e9 AS |
1992 | |
1993 | buf = skb_peek(&sk->sk_receive_queue); | |
1994 | ||
c5fa7b3c | 1995 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1996 | if (res) |
1997 | goto exit; | |
b97bf3fd | 1998 | |
0fef8f20 | 1999 | new_sk = new_sock->sk; |
301bae56 | 2000 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2001 | msg = buf_msg(buf); |
b97bf3fd | 2002 | |
0fef8f20 PG |
2003 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2004 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2005 | ||
2006 | /* | |
2007 | * Reject any stray messages received by new socket | |
2008 | * before the socket lock was taken (very, very unlikely) | |
2009 | */ | |
2e84c60b | 2010 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2011 | |
2012 | /* Connect new socket to it's peer */ | |
301bae56 | 2013 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2014 | new_sock->state = SS_CONNECTED; |
2015 | ||
301bae56 | 2016 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2017 | if (msg_named(msg)) { |
301bae56 JPM |
2018 | new_tsock->conn_type = msg_nametype(msg); |
2019 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2020 | } |
0fef8f20 PG |
2021 | |
2022 | /* | |
2023 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2024 | * Respond to 'SYN+' by queuing it on new socket. | |
2025 | */ | |
2026 | if (!msg_data_sz(msg)) { | |
2027 | struct msghdr m = {NULL,}; | |
2028 | ||
2e84c60b | 2029 | tsk_advance_rx_queue(sk); |
39a0295f | 2030 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2031 | } else { |
2032 | __skb_dequeue(&sk->sk_receive_queue); | |
2033 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2034 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2035 | } |
2036 | release_sock(new_sk); | |
b97bf3fd | 2037 | exit: |
0c3141e9 | 2038 | release_sock(sk); |
b97bf3fd PL |
2039 | return res; |
2040 | } | |
2041 | ||
2042 | /** | |
247f0f3c | 2043 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2044 | * @sock: socket structure |
e247a8f5 | 2045 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2046 | * |
2047 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2048 | * |
b97bf3fd PL |
2049 | * Returns 0 on success, errno otherwise |
2050 | */ | |
247f0f3c | 2051 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2052 | { |
0c3141e9 | 2053 | struct sock *sk = sock->sk; |
f2f9800d | 2054 | struct net *net = sock_net(sk); |
58ed9442 | 2055 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2056 | struct sk_buff *skb; |
80e44c22 | 2057 | u32 dnode; |
b97bf3fd PL |
2058 | int res; |
2059 | ||
e247a8f5 AS |
2060 | if (how != SHUT_RDWR) |
2061 | return -EINVAL; | |
b97bf3fd | 2062 | |
0c3141e9 | 2063 | lock_sock(sk); |
b97bf3fd PL |
2064 | |
2065 | switch (sock->state) { | |
0c3141e9 | 2066 | case SS_CONNECTING: |
b97bf3fd PL |
2067 | case SS_CONNECTED: |
2068 | ||
b97bf3fd | 2069 | restart: |
617d3c7a | 2070 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2071 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2072 | if (skb) { | |
2073 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2074 | kfree_skb(skb); | |
b97bf3fd PL |
2075 | goto restart; |
2076 | } | |
c5898636 | 2077 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 2078 | TIPC_CONN_SHUTDOWN)) |
f2f9800d YX |
2079 | tipc_link_xmit_skb(net, skb, dnode, |
2080 | tsk->portid); | |
0c3141e9 | 2081 | } else { |
301bae56 | 2082 | dnode = tsk_peer_node(tsk); |
c5898636 JPM |
2083 | |
2084 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
80e44c22 | 2085 | TIPC_CONN_MSG, SHORT_H_SIZE, |
c5898636 | 2086 | 0, dnode, tsk_own_node(tsk), |
301bae56 | 2087 | tsk_peer_port(tsk), |
07f6c4bc | 2088 | tsk->portid, TIPC_CONN_SHUTDOWN); |
f2f9800d | 2089 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2090 | } |
301bae56 | 2091 | tsk->connected = 0; |
0c3141e9 | 2092 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2093 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2094 | /* fall through */ |
2095 | ||
2096 | case SS_DISCONNECTING: | |
2097 | ||
75031151 | 2098 | /* Discard any unreceived messages */ |
57467e56 | 2099 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2100 | |
2101 | /* Wake up anyone sleeping in poll */ | |
2102 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2103 | res = 0; |
2104 | break; | |
2105 | ||
2106 | default: | |
2107 | res = -ENOTCONN; | |
2108 | } | |
2109 | ||
0c3141e9 | 2110 | release_sock(sk); |
b97bf3fd PL |
2111 | return res; |
2112 | } | |
2113 | ||
f2f2a96a | 2114 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2115 | { |
f2f2a96a YX |
2116 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2117 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2118 | struct sk_buff *skb = NULL; |
57289015 | 2119 | u32 peer_port, peer_node; |
c5898636 | 2120 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2121 | |
6c9808ce | 2122 | bh_lock_sock(sk); |
301bae56 | 2123 | if (!tsk->connected) { |
6c9808ce JPM |
2124 | bh_unlock_sock(sk); |
2125 | goto exit; | |
57289015 | 2126 | } |
301bae56 JPM |
2127 | peer_port = tsk_peer_port(tsk); |
2128 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2129 | |
301bae56 | 2130 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
57289015 | 2131 | /* Previous probe not answered -> self abort */ |
c5898636 | 2132 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 2133 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, |
c5898636 | 2134 | own_node, peer_node, tsk->portid, |
34747539 | 2135 | peer_port, TIPC_ERR_NO_PORT); |
57289015 | 2136 | } else { |
c5898636 JPM |
2137 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2138 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2139 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2140 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2141 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2142 | } |
2143 | bh_unlock_sock(sk); | |
a6ca1094 | 2144 | if (skb) |
f2f9800d | 2145 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2146 | exit: |
07f6c4bc | 2147 | sock_put(sk); |
57289015 JPM |
2148 | } |
2149 | ||
301bae56 | 2150 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2151 | struct tipc_name_seq const *seq) |
2152 | { | |
f2f9800d | 2153 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2154 | struct publication *publ; |
2155 | u32 key; | |
2156 | ||
301bae56 | 2157 | if (tsk->connected) |
0fc87aae | 2158 | return -EINVAL; |
07f6c4bc YX |
2159 | key = tsk->portid + tsk->pub_count + 1; |
2160 | if (key == tsk->portid) | |
0fc87aae JPM |
2161 | return -EADDRINUSE; |
2162 | ||
f2f9800d | 2163 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2164 | scope, tsk->portid, key); |
0fc87aae JPM |
2165 | if (unlikely(!publ)) |
2166 | return -EINVAL; | |
2167 | ||
301bae56 JPM |
2168 | list_add(&publ->pport_list, &tsk->publications); |
2169 | tsk->pub_count++; | |
2170 | tsk->published = 1; | |
0fc87aae JPM |
2171 | return 0; |
2172 | } | |
2173 | ||
301bae56 | 2174 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2175 | struct tipc_name_seq const *seq) |
2176 | { | |
f2f9800d | 2177 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2178 | struct publication *publ; |
2179 | struct publication *safe; | |
2180 | int rc = -EINVAL; | |
2181 | ||
301bae56 | 2182 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2183 | if (seq) { |
2184 | if (publ->scope != scope) | |
2185 | continue; | |
2186 | if (publ->type != seq->type) | |
2187 | continue; | |
2188 | if (publ->lower != seq->lower) | |
2189 | continue; | |
2190 | if (publ->upper != seq->upper) | |
2191 | break; | |
f2f9800d | 2192 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2193 | publ->ref, publ->key); |
2194 | rc = 0; | |
2195 | break; | |
2196 | } | |
f2f9800d | 2197 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2198 | publ->ref, publ->key); |
2199 | rc = 0; | |
2200 | } | |
301bae56 JPM |
2201 | if (list_empty(&tsk->publications)) |
2202 | tsk->published = 0; | |
0fc87aae JPM |
2203 | return rc; |
2204 | } | |
2205 | ||
5a9ee0be JPM |
2206 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2207 | * when we go from standalone to network mode. | |
2208 | */ | |
e05b31f4 | 2209 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2210 | { |
e05b31f4 | 2211 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2212 | const struct bucket_table *tbl; |
2213 | struct rhash_head *pos; | |
2214 | struct tipc_sock *tsk; | |
5a9ee0be | 2215 | struct tipc_msg *msg; |
07f6c4bc | 2216 | int i; |
5a9ee0be | 2217 | |
07f6c4bc | 2218 | rcu_read_lock(); |
e05b31f4 | 2219 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2220 | for (i = 0; i < tbl->size; i++) { |
2221 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2222 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2223 | msg = &tsk->phdr; | |
34747539 YX |
2224 | msg_set_prevnode(msg, tn->own_addr); |
2225 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2226 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2227 | } | |
5a9ee0be | 2228 | } |
07f6c4bc | 2229 | rcu_read_unlock(); |
5a9ee0be JPM |
2230 | } |
2231 | ||
e05b31f4 | 2232 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2233 | { |
e05b31f4 | 2234 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2235 | struct tipc_sock *tsk; |
808d90f9 | 2236 | |
07f6c4bc | 2237 | rcu_read_lock(); |
e05b31f4 | 2238 | tsk = rhashtable_lookup(&tn->sk_rht, &portid); |
07f6c4bc YX |
2239 | if (tsk) |
2240 | sock_hold(&tsk->sk); | |
2241 | rcu_read_unlock(); | |
808d90f9 | 2242 | |
07f6c4bc | 2243 | return tsk; |
808d90f9 JPM |
2244 | } |
2245 | ||
07f6c4bc | 2246 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2247 | { |
e05b31f4 YX |
2248 | struct sock *sk = &tsk->sk; |
2249 | struct net *net = sock_net(sk); | |
2250 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2251 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2252 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2253 | |
07f6c4bc YX |
2254 | while (remaining--) { |
2255 | portid++; | |
2256 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2257 | portid = TIPC_MIN_PORT; | |
2258 | tsk->portid = portid; | |
2259 | sock_hold(&tsk->sk); | |
e05b31f4 | 2260 | if (rhashtable_lookup_insert(&tn->sk_rht, &tsk->node)) |
07f6c4bc YX |
2261 | return 0; |
2262 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2263 | } |
2264 | ||
07f6c4bc | 2265 | return -1; |
808d90f9 JPM |
2266 | } |
2267 | ||
07f6c4bc | 2268 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2269 | { |
07f6c4bc | 2270 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2271 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2272 | |
e05b31f4 | 2273 | if (rhashtable_remove(&tn->sk_rht, &tsk->node)) { |
07f6c4bc YX |
2274 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2275 | __sock_put(sk); | |
808d90f9 | 2276 | } |
808d90f9 JPM |
2277 | } |
2278 | ||
e05b31f4 | 2279 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2280 | { |
e05b31f4 | 2281 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2282 | struct rhashtable_params rht_params = { |
2283 | .nelem_hint = 192, | |
2284 | .head_offset = offsetof(struct tipc_sock, node), | |
2285 | .key_offset = offsetof(struct tipc_sock, portid), | |
2286 | .key_len = sizeof(u32), /* portid */ | |
2287 | .hashfn = jhash, | |
446c89ac HX |
2288 | .max_size = 1048576, |
2289 | .min_size = 256, | |
07f6c4bc | 2290 | }; |
808d90f9 | 2291 | |
e05b31f4 | 2292 | return rhashtable_init(&tn->sk_rht, &rht_params); |
808d90f9 JPM |
2293 | } |
2294 | ||
e05b31f4 | 2295 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2296 | { |
e05b31f4 YX |
2297 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2298 | ||
07f6c4bc YX |
2299 | /* Wait for socket readers to complete */ |
2300 | synchronize_net(); | |
808d90f9 | 2301 | |
e05b31f4 | 2302 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2303 | } |
2304 | ||
b97bf3fd | 2305 | /** |
247f0f3c | 2306 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2307 | * @sock: socket structure |
2308 | * @lvl: option level | |
2309 | * @opt: option identifier | |
2310 | * @ov: pointer to new option value | |
2311 | * @ol: length of option value | |
c4307285 YH |
2312 | * |
2313 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2314 | * (to ease compatibility). |
c4307285 | 2315 | * |
b97bf3fd PL |
2316 | * Returns 0 on success, errno otherwise |
2317 | */ | |
247f0f3c YX |
2318 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2319 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2320 | { |
0c3141e9 | 2321 | struct sock *sk = sock->sk; |
58ed9442 | 2322 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2323 | u32 value; |
2324 | int res; | |
2325 | ||
c4307285 YH |
2326 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2327 | return 0; | |
b97bf3fd PL |
2328 | if (lvl != SOL_TIPC) |
2329 | return -ENOPROTOOPT; | |
2330 | if (ol < sizeof(value)) | |
2331 | return -EINVAL; | |
2db9983a AS |
2332 | res = get_user(value, (u32 __user *)ov); |
2333 | if (res) | |
b97bf3fd PL |
2334 | return res; |
2335 | ||
0c3141e9 | 2336 | lock_sock(sk); |
c4307285 | 2337 | |
b97bf3fd PL |
2338 | switch (opt) { |
2339 | case TIPC_IMPORTANCE: | |
301bae56 | 2340 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2341 | break; |
2342 | case TIPC_SRC_DROPPABLE: | |
2343 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2344 | tsk_set_unreliable(tsk, value); |
c4307285 | 2345 | else |
b97bf3fd PL |
2346 | res = -ENOPROTOOPT; |
2347 | break; | |
2348 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2349 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2350 | break; |
2351 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2352 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2353 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2354 | break; |
2355 | default: | |
2356 | res = -EINVAL; | |
2357 | } | |
2358 | ||
0c3141e9 AS |
2359 | release_sock(sk); |
2360 | ||
b97bf3fd PL |
2361 | return res; |
2362 | } | |
2363 | ||
2364 | /** | |
247f0f3c | 2365 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2366 | * @sock: socket structure |
2367 | * @lvl: option level | |
2368 | * @opt: option identifier | |
2369 | * @ov: receptacle for option value | |
2370 | * @ol: receptacle for length of option value | |
c4307285 YH |
2371 | * |
2372 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2373 | * (to ease compatibility). |
c4307285 | 2374 | * |
b97bf3fd PL |
2375 | * Returns 0 on success, errno otherwise |
2376 | */ | |
247f0f3c YX |
2377 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2378 | char __user *ov, int __user *ol) | |
b97bf3fd | 2379 | { |
0c3141e9 | 2380 | struct sock *sk = sock->sk; |
58ed9442 | 2381 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2382 | int len; |
b97bf3fd | 2383 | u32 value; |
c4307285 | 2384 | int res; |
b97bf3fd | 2385 | |
c4307285 YH |
2386 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2387 | return put_user(0, ol); | |
b97bf3fd PL |
2388 | if (lvl != SOL_TIPC) |
2389 | return -ENOPROTOOPT; | |
2db9983a AS |
2390 | res = get_user(len, ol); |
2391 | if (res) | |
c4307285 | 2392 | return res; |
b97bf3fd | 2393 | |
0c3141e9 | 2394 | lock_sock(sk); |
b97bf3fd PL |
2395 | |
2396 | switch (opt) { | |
2397 | case TIPC_IMPORTANCE: | |
301bae56 | 2398 | value = tsk_importance(tsk); |
b97bf3fd PL |
2399 | break; |
2400 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2401 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2402 | break; |
2403 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2404 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2405 | break; |
2406 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2407 | value = tsk->conn_timeout; |
0c3141e9 | 2408 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2409 | break; |
0e65967e | 2410 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2411 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2412 | break; |
0e65967e | 2413 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2414 | value = skb_queue_len(&sk->sk_receive_queue); |
2415 | break; | |
b97bf3fd PL |
2416 | default: |
2417 | res = -EINVAL; | |
2418 | } | |
2419 | ||
0c3141e9 AS |
2420 | release_sock(sk); |
2421 | ||
25860c3b PG |
2422 | if (res) |
2423 | return res; /* "get" failed */ | |
b97bf3fd | 2424 | |
25860c3b PG |
2425 | if (len < sizeof(value)) |
2426 | return -EINVAL; | |
2427 | ||
2428 | if (copy_to_user(ov, &value, sizeof(value))) | |
2429 | return -EFAULT; | |
2430 | ||
2431 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2432 | } |
2433 | ||
f2f9800d | 2434 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2435 | { |
f2f9800d | 2436 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2437 | struct tipc_sioc_ln_req lnr; |
2438 | void __user *argp = (void __user *)arg; | |
2439 | ||
2440 | switch (cmd) { | |
2441 | case SIOCGETLINKNAME: | |
2442 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2443 | return -EFAULT; | |
f2f9800d YX |
2444 | if (!tipc_node_get_linkname(sock_net(sk), |
2445 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2446 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2447 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2448 | return -EFAULT; | |
2449 | return 0; | |
2450 | } | |
2451 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2452 | default: |
2453 | return -ENOIOCTLCMD; | |
2454 | } | |
2455 | } | |
2456 | ||
ae86b9e3 BH |
2457 | /* Protocol switches for the various types of TIPC sockets */ |
2458 | ||
bca65eae | 2459 | static const struct proto_ops msg_ops = { |
0e65967e | 2460 | .owner = THIS_MODULE, |
b97bf3fd | 2461 | .family = AF_TIPC, |
247f0f3c YX |
2462 | .release = tipc_release, |
2463 | .bind = tipc_bind, | |
2464 | .connect = tipc_connect, | |
5eee6a6d | 2465 | .socketpair = sock_no_socketpair, |
245f3d34 | 2466 | .accept = sock_no_accept, |
247f0f3c YX |
2467 | .getname = tipc_getname, |
2468 | .poll = tipc_poll, | |
78acb1f9 | 2469 | .ioctl = tipc_ioctl, |
245f3d34 | 2470 | .listen = sock_no_listen, |
247f0f3c YX |
2471 | .shutdown = tipc_shutdown, |
2472 | .setsockopt = tipc_setsockopt, | |
2473 | .getsockopt = tipc_getsockopt, | |
2474 | .sendmsg = tipc_sendmsg, | |
2475 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2476 | .mmap = sock_no_mmap, |
2477 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2478 | }; |
2479 | ||
bca65eae | 2480 | static const struct proto_ops packet_ops = { |
0e65967e | 2481 | .owner = THIS_MODULE, |
b97bf3fd | 2482 | .family = AF_TIPC, |
247f0f3c YX |
2483 | .release = tipc_release, |
2484 | .bind = tipc_bind, | |
2485 | .connect = tipc_connect, | |
5eee6a6d | 2486 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2487 | .accept = tipc_accept, |
2488 | .getname = tipc_getname, | |
2489 | .poll = tipc_poll, | |
78acb1f9 | 2490 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2491 | .listen = tipc_listen, |
2492 | .shutdown = tipc_shutdown, | |
2493 | .setsockopt = tipc_setsockopt, | |
2494 | .getsockopt = tipc_getsockopt, | |
2495 | .sendmsg = tipc_send_packet, | |
2496 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2497 | .mmap = sock_no_mmap, |
2498 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2499 | }; |
2500 | ||
bca65eae | 2501 | static const struct proto_ops stream_ops = { |
0e65967e | 2502 | .owner = THIS_MODULE, |
b97bf3fd | 2503 | .family = AF_TIPC, |
247f0f3c YX |
2504 | .release = tipc_release, |
2505 | .bind = tipc_bind, | |
2506 | .connect = tipc_connect, | |
5eee6a6d | 2507 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2508 | .accept = tipc_accept, |
2509 | .getname = tipc_getname, | |
2510 | .poll = tipc_poll, | |
78acb1f9 | 2511 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2512 | .listen = tipc_listen, |
2513 | .shutdown = tipc_shutdown, | |
2514 | .setsockopt = tipc_setsockopt, | |
2515 | .getsockopt = tipc_getsockopt, | |
2516 | .sendmsg = tipc_send_stream, | |
2517 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2518 | .mmap = sock_no_mmap, |
2519 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2520 | }; |
2521 | ||
bca65eae | 2522 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2523 | .owner = THIS_MODULE, |
b97bf3fd | 2524 | .family = AF_TIPC, |
c5fa7b3c | 2525 | .create = tipc_sk_create |
b97bf3fd PL |
2526 | }; |
2527 | ||
2528 | static struct proto tipc_proto = { | |
2529 | .name = "TIPC", | |
2530 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2531 | .obj_size = sizeof(struct tipc_sock), |
2532 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2533 | }; |
2534 | ||
2535 | /** | |
4323add6 | 2536 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2537 | * |
b97bf3fd PL |
2538 | * Returns 0 on success, errno otherwise |
2539 | */ | |
4323add6 | 2540 | int tipc_socket_init(void) |
b97bf3fd PL |
2541 | { |
2542 | int res; | |
2543 | ||
c4307285 | 2544 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2545 | if (res) { |
2cf8aa19 | 2546 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2547 | goto out; |
2548 | } | |
2549 | ||
2550 | res = sock_register(&tipc_family_ops); | |
2551 | if (res) { | |
2cf8aa19 | 2552 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2553 | proto_unregister(&tipc_proto); |
2554 | goto out; | |
2555 | } | |
b97bf3fd PL |
2556 | out: |
2557 | return res; | |
2558 | } | |
2559 | ||
2560 | /** | |
4323add6 | 2561 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2562 | */ |
4323add6 | 2563 | void tipc_socket_stop(void) |
b97bf3fd | 2564 | { |
b97bf3fd PL |
2565 | sock_unregister(tipc_family_ops.family); |
2566 | proto_unregister(&tipc_proto); | |
2567 | } | |
34b78a12 RA |
2568 | |
2569 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2570 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2571 | { |
2572 | u32 peer_node; | |
2573 | u32 peer_port; | |
2574 | struct nlattr *nest; | |
2575 | ||
2576 | peer_node = tsk_peer_node(tsk); | |
2577 | peer_port = tsk_peer_port(tsk); | |
2578 | ||
2579 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2580 | ||
2581 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2582 | goto msg_full; | |
2583 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2584 | goto msg_full; | |
2585 | ||
2586 | if (tsk->conn_type != 0) { | |
2587 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2588 | goto msg_full; | |
2589 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2590 | goto msg_full; | |
2591 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2592 | goto msg_full; | |
2593 | } | |
2594 | nla_nest_end(skb, nest); | |
2595 | ||
2596 | return 0; | |
2597 | ||
2598 | msg_full: | |
2599 | nla_nest_cancel(skb, nest); | |
2600 | ||
2601 | return -EMSGSIZE; | |
2602 | } | |
2603 | ||
2604 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2605 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2606 | struct tipc_sock *tsk) | |
34b78a12 RA |
2607 | { |
2608 | int err; | |
2609 | void *hdr; | |
2610 | struct nlattr *attrs; | |
34747539 YX |
2611 | struct net *net = sock_net(skb->sk); |
2612 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2613 | |
2614 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2615 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2616 | if (!hdr) |
2617 | goto msg_cancel; | |
2618 | ||
2619 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2620 | if (!attrs) | |
2621 | goto genlmsg_cancel; | |
07f6c4bc | 2622 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2623 | goto attr_msg_cancel; |
34747539 | 2624 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2625 | goto attr_msg_cancel; |
2626 | ||
2627 | if (tsk->connected) { | |
2628 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2629 | if (err) | |
2630 | goto attr_msg_cancel; | |
2631 | } else if (!list_empty(&tsk->publications)) { | |
2632 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2633 | goto attr_msg_cancel; | |
2634 | } | |
2635 | nla_nest_end(skb, attrs); | |
2636 | genlmsg_end(skb, hdr); | |
2637 | ||
2638 | return 0; | |
2639 | ||
2640 | attr_msg_cancel: | |
2641 | nla_nest_cancel(skb, attrs); | |
2642 | genlmsg_cancel: | |
2643 | genlmsg_cancel(skb, hdr); | |
2644 | msg_cancel: | |
2645 | return -EMSGSIZE; | |
2646 | } | |
2647 | ||
2648 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2649 | { | |
2650 | int err; | |
2651 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2652 | const struct bucket_table *tbl; |
2653 | struct rhash_head *pos; | |
e05b31f4 YX |
2654 | struct net *net = sock_net(skb->sk); |
2655 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2656 | u32 tbl_id = cb->args[0]; |
2657 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2658 | |
07f6c4bc | 2659 | rcu_read_lock(); |
e05b31f4 | 2660 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2661 | for (; tbl_id < tbl->size; tbl_id++) { |
2662 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2663 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2664 | if (prev_portid && prev_portid != tsk->portid) { |
2665 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2666 | continue; | |
2667 | } | |
2668 | ||
07f6c4bc | 2669 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2670 | if (err) { |
2671 | prev_portid = tsk->portid; | |
2672 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2673 | goto out; | |
2674 | } | |
2675 | prev_portid = 0; | |
07f6c4bc | 2676 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2677 | } |
34b78a12 | 2678 | } |
d6e164e3 | 2679 | out: |
07f6c4bc | 2680 | rcu_read_unlock(); |
d6e164e3 RA |
2681 | cb->args[0] = tbl_id; |
2682 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2683 | |
2684 | return skb->len; | |
2685 | } | |
1a1a143d RA |
2686 | |
2687 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2688 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2689 | struct netlink_callback *cb, | |
2690 | struct publication *publ) | |
1a1a143d RA |
2691 | { |
2692 | void *hdr; | |
2693 | struct nlattr *attrs; | |
2694 | ||
2695 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2696 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2697 | if (!hdr) |
2698 | goto msg_cancel; | |
2699 | ||
2700 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2701 | if (!attrs) | |
2702 | goto genlmsg_cancel; | |
2703 | ||
2704 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2705 | goto attr_msg_cancel; | |
2706 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2707 | goto attr_msg_cancel; | |
2708 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2709 | goto attr_msg_cancel; | |
2710 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2711 | goto attr_msg_cancel; | |
2712 | ||
2713 | nla_nest_end(skb, attrs); | |
2714 | genlmsg_end(skb, hdr); | |
2715 | ||
2716 | return 0; | |
2717 | ||
2718 | attr_msg_cancel: | |
2719 | nla_nest_cancel(skb, attrs); | |
2720 | genlmsg_cancel: | |
2721 | genlmsg_cancel(skb, hdr); | |
2722 | msg_cancel: | |
2723 | return -EMSGSIZE; | |
2724 | } | |
2725 | ||
2726 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2727 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2728 | struct netlink_callback *cb, | |
2729 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2730 | { |
2731 | int err; | |
2732 | struct publication *p; | |
2733 | ||
2734 | if (*last_publ) { | |
2735 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2736 | if (p->key == *last_publ) | |
2737 | break; | |
2738 | } | |
2739 | if (p->key != *last_publ) { | |
2740 | /* We never set seq or call nl_dump_check_consistent() | |
2741 | * this means that setting prev_seq here will cause the | |
2742 | * consistence check to fail in the netlink callback | |
2743 | * handler. Resulting in the last NLMSG_DONE message | |
2744 | * having the NLM_F_DUMP_INTR flag set. | |
2745 | */ | |
2746 | cb->prev_seq = 1; | |
2747 | *last_publ = 0; | |
2748 | return -EPIPE; | |
2749 | } | |
2750 | } else { | |
2751 | p = list_first_entry(&tsk->publications, struct publication, | |
2752 | pport_list); | |
2753 | } | |
2754 | ||
2755 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2756 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2757 | if (err) { | |
2758 | *last_publ = p->key; | |
2759 | return err; | |
2760 | } | |
2761 | } | |
2762 | *last_publ = 0; | |
2763 | ||
2764 | return 0; | |
2765 | } | |
2766 | ||
2767 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2768 | { | |
2769 | int err; | |
07f6c4bc | 2770 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2771 | u32 last_publ = cb->args[1]; |
2772 | u32 done = cb->args[2]; | |
e05b31f4 | 2773 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2774 | struct tipc_sock *tsk; |
2775 | ||
07f6c4bc | 2776 | if (!tsk_portid) { |
1a1a143d RA |
2777 | struct nlattr **attrs; |
2778 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2779 | ||
2780 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2781 | if (err) | |
2782 | return err; | |
2783 | ||
2784 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2785 | attrs[TIPC_NLA_SOCK], | |
2786 | tipc_nl_sock_policy); | |
2787 | if (err) | |
2788 | return err; | |
2789 | ||
2790 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2791 | return -EINVAL; | |
2792 | ||
07f6c4bc | 2793 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2794 | } |
2795 | ||
2796 | if (done) | |
2797 | return 0; | |
2798 | ||
e05b31f4 | 2799 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2800 | if (!tsk) |
2801 | return -EINVAL; | |
2802 | ||
2803 | lock_sock(&tsk->sk); | |
2804 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2805 | if (!err) | |
2806 | done = 1; | |
2807 | release_sock(&tsk->sk); | |
07f6c4bc | 2808 | sock_put(&tsk->sk); |
1a1a143d | 2809 | |
07f6c4bc | 2810 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2811 | cb->args[1] = last_publ; |
2812 | cb->args[2] = done; | |
2813 | ||
2814 | return skb->len; | |
2815 | } |