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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
51b9a31c | 4 | * Copyright (c) 2001-2007, 2012-2016, 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 | 37 | #include <linux/rhashtable.h> |
174cd4b1 IM |
38 | #include <linux/sched/signal.h> |
39 | ||
b97bf3fd | 40 | #include "core.h" |
e2dafe87 | 41 | #include "name_table.h" |
78acb1f9 | 42 | #include "node.h" |
e2dafe87 | 43 | #include "link.h" |
c637c103 | 44 | #include "name_distr.h" |
2e84c60b | 45 | #include "socket.h" |
a6bf70f7 | 46 | #include "bcast.h" |
49cc66ea | 47 | #include "netlink.h" |
2cf8aa19 | 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 | 51 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
52 | #define TIPC_MAX_PORT 0xffffffff |
53 | #define TIPC_MIN_PORT 1 | |
301bae56 | 54 | |
0c288c86 PB |
55 | enum { |
56 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 57 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 58 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 59 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 60 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
61 | }; |
62 | ||
301bae56 JPM |
63 | /** |
64 | * struct tipc_sock - TIPC socket structure | |
65 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
66 | * @conn_type: TIPC type used when connection was established |
67 | * @conn_instance: TIPC instance used when connection was established | |
68 | * @published: non-zero if port has one or more associated names | |
69 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 70 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 71 | * @phdr: preformatted message header used when sending messages |
365ad353 | 72 | * #cong_links: list of congested links |
301bae56 | 73 | * @publications: list of publications for port |
365ad353 | 74 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 JPM |
75 | * @pub_count: total # of publications port has made during its lifetime |
76 | * @probing_state: | |
301bae56 JPM |
77 | * @conn_timeout: the time we can wait for an unresponded setup request |
78 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 79 | * @cong_link_cnt: number of congested links |
301bae56 JPM |
80 | * @sent_unacked: # messages sent by socket, and not yet acked by peer |
81 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
aeda16b6 | 82 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 83 | * @node: hash table node |
01fd12bb | 84 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 85 | * @rcu: rcu struct for tipc_sock |
301bae56 JPM |
86 | */ |
87 | struct tipc_sock { | |
88 | struct sock sk; | |
301bae56 JPM |
89 | u32 conn_type; |
90 | u32 conn_instance; | |
91 | int published; | |
92 | u32 max_pkt; | |
07f6c4bc | 93 | u32 portid; |
301bae56 | 94 | struct tipc_msg phdr; |
365ad353 | 95 | struct list_head cong_links; |
301bae56 JPM |
96 | struct list_head publications; |
97 | u32 pub_count; | |
301bae56 JPM |
98 | uint conn_timeout; |
99 | atomic_t dupl_rcvcnt; | |
8ea642ee | 100 | bool probe_unacked; |
365ad353 | 101 | u16 cong_link_cnt; |
10724cc7 JPM |
102 | u16 snt_unacked; |
103 | u16 snd_win; | |
60020e18 | 104 | u16 peer_caps; |
10724cc7 JPM |
105 | u16 rcv_unacked; |
106 | u16 rcv_win; | |
aeda16b6 | 107 | struct sockaddr_tipc peer; |
07f6c4bc | 108 | struct rhash_head node; |
01fd12bb | 109 | struct tipc_mc_method mc_method; |
07f6c4bc | 110 | struct rcu_head rcu; |
301bae56 | 111 | }; |
b97bf3fd | 112 | |
4f4482dc | 113 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 114 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 115 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 116 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
117 | static int tipc_release(struct socket *sock); |
118 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
f2f2a96a | 119 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 120 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 121 | struct tipc_name_seq const *seq); |
301bae56 | 122 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 123 | struct tipc_name_seq const *seq); |
e05b31f4 | 124 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
125 | static int tipc_sk_insert(struct tipc_sock *tsk); |
126 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 127 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 128 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
b97bf3fd | 129 | |
bca65eae FW |
130 | static const struct proto_ops packet_ops; |
131 | static const struct proto_ops stream_ops; | |
132 | static const struct proto_ops msg_ops; | |
b97bf3fd | 133 | static struct proto tipc_proto; |
6cca7289 HX |
134 | static const struct rhashtable_params tsk_rht_params; |
135 | ||
c5898636 JPM |
136 | static u32 tsk_own_node(struct tipc_sock *tsk) |
137 | { | |
138 | return msg_prevnode(&tsk->phdr); | |
139 | } | |
140 | ||
301bae56 | 141 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 142 | { |
301bae56 | 143 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
144 | } |
145 | ||
301bae56 | 146 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 147 | { |
301bae56 | 148 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
149 | } |
150 | ||
301bae56 | 151 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 152 | { |
301bae56 | 153 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
154 | } |
155 | ||
301bae56 | 156 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 157 | { |
301bae56 | 158 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
159 | } |
160 | ||
301bae56 | 161 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 162 | { |
301bae56 | 163 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
164 | } |
165 | ||
301bae56 | 166 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 167 | { |
301bae56 | 168 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
169 | } |
170 | ||
301bae56 | 171 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 172 | { |
301bae56 | 173 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
174 | } |
175 | ||
301bae56 | 176 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
177 | { |
178 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
179 | return -EINVAL; | |
301bae56 | 180 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
181 | return 0; |
182 | } | |
8826cde6 | 183 | |
301bae56 JPM |
184 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
185 | { | |
186 | return container_of(sk, struct tipc_sock, sk); | |
187 | } | |
188 | ||
10724cc7 | 189 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 190 | { |
6998cc6e | 191 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
192 | } |
193 | ||
194 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
195 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
196 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
197 | */ | |
198 | static u16 tsk_adv_blocks(int len) | |
199 | { | |
200 | return len / FLOWCTL_BLK_SZ / 4; | |
201 | } | |
202 | ||
203 | /* tsk_inc(): increment counter for sent or received data | |
204 | * - If block based flow control is not supported by peer we | |
205 | * fall back to message based ditto, incrementing the counter | |
206 | */ | |
207 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
208 | { | |
209 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
210 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
211 | return 1; | |
301bae56 JPM |
212 | } |
213 | ||
0c3141e9 | 214 | /** |
2e84c60b | 215 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
216 | * |
217 | * Caller must hold socket lock | |
b97bf3fd | 218 | */ |
2e84c60b | 219 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 220 | { |
5f6d9123 | 221 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
222 | } |
223 | ||
bcd3ffd4 JPM |
224 | /* tipc_sk_respond() : send response message back to sender |
225 | */ | |
226 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
227 | { | |
228 | u32 selector; | |
229 | u32 dnode; | |
230 | u32 onode = tipc_own_addr(sock_net(sk)); | |
231 | ||
232 | if (!tipc_msg_reverse(onode, &skb, err)) | |
233 | return; | |
234 | ||
235 | dnode = msg_destnode(buf_msg(skb)); | |
236 | selector = msg_origport(buf_msg(skb)); | |
237 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
238 | } | |
239 | ||
b97bf3fd | 240 | /** |
2e84c60b | 241 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
242 | * |
243 | * Caller must hold socket lock | |
b97bf3fd | 244 | */ |
2e84c60b | 245 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 246 | { |
a6ca1094 | 247 | struct sk_buff *skb; |
0c3141e9 | 248 | |
bcd3ffd4 JPM |
249 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
250 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
251 | } |
252 | ||
d6fb7e9c PB |
253 | static bool tipc_sk_connected(struct sock *sk) |
254 | { | |
f40acbaf | 255 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
256 | } |
257 | ||
c752023a PB |
258 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
259 | * @sk: socket | |
260 | * | |
261 | * Returns true if connection less, false otherwise | |
262 | */ | |
263 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
264 | { | |
265 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
266 | } | |
267 | ||
2e84c60b | 268 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
269 | * |
270 | * Handles cases where the node's network address has changed from | |
271 | * the default of <0.0.0> to its configured setting. | |
272 | */ | |
2e84c60b | 273 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 274 | { |
d6fb7e9c PB |
275 | struct sock *sk = &tsk->sk; |
276 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 277 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
278 | u32 orig_node; |
279 | u32 peer_node; | |
280 | ||
d6fb7e9c | 281 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
282 | return false; |
283 | ||
284 | if (unlikely(msg_origport(msg) != peer_port)) | |
285 | return false; | |
286 | ||
287 | orig_node = msg_orignode(msg); | |
301bae56 | 288 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
289 | |
290 | if (likely(orig_node == peer_node)) | |
291 | return true; | |
292 | ||
34747539 | 293 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
294 | return true; |
295 | ||
34747539 | 296 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
297 | return true; |
298 | ||
299 | return false; | |
300 | } | |
301 | ||
0c288c86 PB |
302 | /* tipc_set_sk_state - set the sk_state of the socket |
303 | * @sk: socket | |
304 | * | |
305 | * Caller must hold socket lock | |
306 | * | |
307 | * Returns 0 on success, errno otherwise | |
308 | */ | |
309 | static int tipc_set_sk_state(struct sock *sk, int state) | |
310 | { | |
438adcaf | 311 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
312 | int res = -EINVAL; |
313 | ||
314 | switch (state) { | |
438adcaf PB |
315 | case TIPC_OPEN: |
316 | res = 0; | |
317 | break; | |
0c288c86 | 318 | case TIPC_LISTEN: |
99a20889 | 319 | case TIPC_CONNECTING: |
438adcaf | 320 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
321 | res = 0; |
322 | break; | |
8ea642ee | 323 | case TIPC_ESTABLISHED: |
99a20889 | 324 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 325 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
326 | res = 0; |
327 | break; | |
9fd4b070 | 328 | case TIPC_DISCONNECTING: |
99a20889 | 329 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
330 | oldsk_state == TIPC_ESTABLISHED) |
331 | res = 0; | |
332 | break; | |
0c288c86 PB |
333 | } |
334 | ||
335 | if (!res) | |
336 | sk->sk_state = state; | |
337 | ||
338 | return res; | |
339 | } | |
340 | ||
8c44e1af JPM |
341 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
342 | { | |
343 | struct sock *sk = sock->sk; | |
344 | int err = sock_error(sk); | |
345 | int typ = sock->type; | |
346 | ||
347 | if (err) | |
348 | return err; | |
349 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
350 | if (sk->sk_state == TIPC_DISCONNECTING) | |
351 | return -EPIPE; | |
352 | else if (!tipc_sk_connected(sk)) | |
353 | return -ENOTCONN; | |
354 | } | |
355 | if (!*timeout) | |
356 | return -EAGAIN; | |
357 | if (signal_pending(current)) | |
358 | return sock_intr_errno(*timeout); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | #define tipc_wait_for_cond(sock_, timeout_, condition_) \ | |
364 | ({ \ | |
365 | int rc_ = 0; \ | |
366 | int done_ = 0; \ | |
367 | \ | |
368 | while (!(condition_) && !done_) { \ | |
369 | struct sock *sk_ = sock->sk; \ | |
370 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
371 | \ | |
372 | rc_ = tipc_sk_sock_err(sock_, timeout_); \ | |
373 | if (rc_) \ | |
374 | break; \ | |
375 | prepare_to_wait(sk_sleep(sk_), &wait_, \ | |
376 | TASK_INTERRUPTIBLE); \ | |
377 | done_ = sk_wait_event(sk_, timeout_, \ | |
378 | (condition_), &wait_); \ | |
379 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
380 | } \ | |
381 | rc_; \ | |
382 | }) | |
383 | ||
b97bf3fd | 384 | /** |
c5fa7b3c | 385 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 386 | * @net: network namespace (must be default network) |
b97bf3fd PL |
387 | * @sock: pre-allocated socket structure |
388 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 389 | * @kern: caused by kernel or by userspace? |
c4307285 | 390 | * |
0c3141e9 AS |
391 | * This routine creates additional data structures used by the TIPC socket, |
392 | * initializes them, and links them together. | |
b97bf3fd PL |
393 | * |
394 | * Returns 0 on success, errno otherwise | |
395 | */ | |
58ed9442 JPM |
396 | static int tipc_sk_create(struct net *net, struct socket *sock, |
397 | int protocol, int kern) | |
b97bf3fd | 398 | { |
c5898636 | 399 | struct tipc_net *tn; |
0c3141e9 | 400 | const struct proto_ops *ops; |
b97bf3fd | 401 | struct sock *sk; |
58ed9442 | 402 | struct tipc_sock *tsk; |
5b8fa7ce | 403 | struct tipc_msg *msg; |
0c3141e9 AS |
404 | |
405 | /* Validate arguments */ | |
b97bf3fd PL |
406 | if (unlikely(protocol != 0)) |
407 | return -EPROTONOSUPPORT; | |
408 | ||
b97bf3fd PL |
409 | switch (sock->type) { |
410 | case SOCK_STREAM: | |
0c3141e9 | 411 | ops = &stream_ops; |
b97bf3fd PL |
412 | break; |
413 | case SOCK_SEQPACKET: | |
0c3141e9 | 414 | ops = &packet_ops; |
b97bf3fd PL |
415 | break; |
416 | case SOCK_DGRAM: | |
b97bf3fd | 417 | case SOCK_RDM: |
0c3141e9 | 418 | ops = &msg_ops; |
b97bf3fd | 419 | break; |
49978651 | 420 | default: |
49978651 | 421 | return -EPROTOTYPE; |
b97bf3fd PL |
422 | } |
423 | ||
0c3141e9 | 424 | /* Allocate socket's protocol area */ |
11aa9c28 | 425 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 426 | if (sk == NULL) |
b97bf3fd | 427 | return -ENOMEM; |
b97bf3fd | 428 | |
58ed9442 | 429 | tsk = tipc_sk(sk); |
301bae56 | 430 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 431 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 432 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 433 | msg = &tsk->phdr; |
c5898636 | 434 | tn = net_generic(sock_net(sk), tipc_net_id); |
b97bf3fd | 435 | |
0c3141e9 | 436 | /* Finish initializing socket data structures */ |
0c3141e9 | 437 | sock->ops = ops; |
0c3141e9 | 438 | sock_init_data(sock, sk); |
438adcaf | 439 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 440 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 441 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
442 | return -EINVAL; |
443 | } | |
40f9f439 HX |
444 | |
445 | /* Ensure tsk is visible before we read own_addr. */ | |
446 | smp_mb(); | |
447 | ||
448 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
449 | NAMED_H_SIZE, 0); | |
450 | ||
07f6c4bc | 451 | msg_set_origport(msg, tsk->portid); |
3721e9c7 | 452 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
6f00089c | 453 | sk->sk_shutdown = 0; |
4f4482dc | 454 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 455 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
456 | sk->sk_data_ready = tipc_data_ready; |
457 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 458 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
459 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
460 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 461 | |
10724cc7 JPM |
462 | /* Start out with safe limits until we receive an advertised window */ |
463 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
464 | tsk->rcv_win = tsk->snd_win; | |
465 | ||
c752023a | 466 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 467 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 468 | if (sock->type == SOCK_DGRAM) |
301bae56 | 469 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 470 | } |
438adcaf | 471 | |
b97bf3fd PL |
472 | return 0; |
473 | } | |
474 | ||
07f6c4bc YX |
475 | static void tipc_sk_callback(struct rcu_head *head) |
476 | { | |
477 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
478 | ||
479 | sock_put(&tsk->sk); | |
480 | } | |
481 | ||
6f00089c PB |
482 | /* Caller should hold socket lock for the socket. */ |
483 | static void __tipc_shutdown(struct socket *sock, int error) | |
484 | { | |
485 | struct sock *sk = sock->sk; | |
486 | struct tipc_sock *tsk = tipc_sk(sk); | |
487 | struct net *net = sock_net(sk); | |
365ad353 | 488 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
489 | u32 dnode = tsk_peer_node(tsk); |
490 | struct sk_buff *skb; | |
491 | ||
365ad353 JPM |
492 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
493 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
494 | !tsk_conn_cong(tsk))); | |
495 | ||
6f00089c PB |
496 | /* Reject all unreceived messages, except on an active connection |
497 | * (which disconnects locally & sends a 'FIN+' to peer). | |
498 | */ | |
499 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
500 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
501 | kfree_skb(skb); | |
693c5649 | 502 | continue; |
6f00089c | 503 | } |
693c5649 JPM |
504 | if (!tipc_sk_type_connectionless(sk) && |
505 | sk->sk_state != TIPC_DISCONNECTING) { | |
506 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
507 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
508 | } | |
509 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 510 | } |
693c5649 JPM |
511 | |
512 | if (tipc_sk_type_connectionless(sk)) | |
513 | return; | |
514 | ||
6f00089c PB |
515 | if (sk->sk_state != TIPC_DISCONNECTING) { |
516 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
517 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
518 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
519 | tsk->portid, error); | |
520 | if (skb) | |
521 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
522 | tipc_node_remove_conn(net, dnode, tsk->portid); |
523 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
524 | } |
525 | } | |
526 | ||
b97bf3fd | 527 | /** |
247f0f3c | 528 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
529 | * @sock: socket to destroy |
530 | * | |
531 | * This routine cleans up any messages that are still queued on the socket. | |
532 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
533 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
534 | * and any others are discarded. (If the first message on a STREAM socket | |
535 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 536 | * |
b97bf3fd PL |
537 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
538 | * are returned or discarded according to the "destination droppable" setting | |
539 | * specified for the message by the sender. | |
540 | * | |
541 | * Returns 0 on success, errno otherwise | |
542 | */ | |
247f0f3c | 543 | static int tipc_release(struct socket *sock) |
b97bf3fd | 544 | { |
b97bf3fd | 545 | struct sock *sk = sock->sk; |
58ed9442 | 546 | struct tipc_sock *tsk; |
b97bf3fd | 547 | |
0c3141e9 AS |
548 | /* |
549 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
550 | * releases a pre-allocated child socket that was never used) | |
551 | */ | |
0c3141e9 | 552 | if (sk == NULL) |
b97bf3fd | 553 | return 0; |
c4307285 | 554 | |
58ed9442 | 555 | tsk = tipc_sk(sk); |
0c3141e9 AS |
556 | lock_sock(sk); |
557 | ||
6f00089c PB |
558 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
559 | sk->sk_shutdown = SHUTDOWN_MASK; | |
301bae56 | 560 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 561 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 562 | tipc_sk_remove(tsk); |
b97bf3fd | 563 | |
0c3141e9 | 564 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 565 | release_sock(sk); |
365ad353 JPM |
566 | u32_list_purge(&tsk->cong_links); |
567 | tsk->cong_link_cnt = 0; | |
07f6c4bc | 568 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 569 | sock->sk = NULL; |
b97bf3fd | 570 | |
065d7e39 | 571 | return 0; |
b97bf3fd PL |
572 | } |
573 | ||
574 | /** | |
247f0f3c | 575 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
576 | * @sock: socket structure |
577 | * @uaddr: socket address describing name(s) and desired operation | |
578 | * @uaddr_len: size of socket address data structure | |
c4307285 | 579 | * |
b97bf3fd PL |
580 | * Name and name sequence binding is indicated using a positive scope value; |
581 | * a negative scope value unbinds the specified name. Specifying no name | |
582 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 583 | * |
b97bf3fd | 584 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
585 | * |
586 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
587 | * access any non-constant socket information. | |
b97bf3fd | 588 | */ |
247f0f3c YX |
589 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
590 | int uaddr_len) | |
b97bf3fd | 591 | { |
84602761 | 592 | struct sock *sk = sock->sk; |
b97bf3fd | 593 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 594 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 595 | int res = -EINVAL; |
b97bf3fd | 596 | |
84602761 YX |
597 | lock_sock(sk); |
598 | if (unlikely(!uaddr_len)) { | |
301bae56 | 599 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
600 | goto exit; |
601 | } | |
c4307285 | 602 | |
84602761 YX |
603 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
604 | res = -EINVAL; | |
605 | goto exit; | |
606 | } | |
607 | if (addr->family != AF_TIPC) { | |
608 | res = -EAFNOSUPPORT; | |
609 | goto exit; | |
610 | } | |
b97bf3fd | 611 | |
b97bf3fd PL |
612 | if (addr->addrtype == TIPC_ADDR_NAME) |
613 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
614 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
615 | res = -EAFNOSUPPORT; | |
616 | goto exit; | |
617 | } | |
c4307285 | 618 | |
13a2e898 | 619 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 620 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
621 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
622 | res = -EACCES; | |
623 | goto exit; | |
624 | } | |
c422f1bd | 625 | |
84602761 | 626 | res = (addr->scope > 0) ? |
301bae56 JPM |
627 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
628 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
629 | exit: |
630 | release_sock(sk); | |
631 | return res; | |
b97bf3fd PL |
632 | } |
633 | ||
c4307285 | 634 | /** |
247f0f3c | 635 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
636 | * @sock: socket structure |
637 | * @uaddr: area for returned socket address | |
638 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 639 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 640 | * |
b97bf3fd | 641 | * Returns 0 on success, errno otherwise |
0c3141e9 | 642 | * |
2da59918 AS |
643 | * NOTE: This routine doesn't need to take the socket lock since it only |
644 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 645 | * a completely predictable manner). |
b97bf3fd | 646 | */ |
247f0f3c YX |
647 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
648 | int *uaddr_len, int peer) | |
b97bf3fd | 649 | { |
b97bf3fd | 650 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
651 | struct sock *sk = sock->sk; |
652 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 653 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 654 | |
88f8a5e3 | 655 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 656 | if (peer) { |
f40acbaf | 657 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 658 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 659 | return -ENOTCONN; |
301bae56 JPM |
660 | addr->addr.id.ref = tsk_peer_port(tsk); |
661 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 662 | } else { |
07f6c4bc | 663 | addr->addr.id.ref = tsk->portid; |
34747539 | 664 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 665 | } |
b97bf3fd PL |
666 | |
667 | *uaddr_len = sizeof(*addr); | |
668 | addr->addrtype = TIPC_ADDR_ID; | |
669 | addr->family = AF_TIPC; | |
670 | addr->scope = 0; | |
b97bf3fd PL |
671 | addr->addr.name.domain = 0; |
672 | ||
0c3141e9 | 673 | return 0; |
b97bf3fd PL |
674 | } |
675 | ||
676 | /** | |
247f0f3c | 677 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
678 | * @file: file structure associated with the socket |
679 | * @sock: socket for which to calculate the poll bits | |
680 | * @wait: ??? | |
681 | * | |
9b674e82 AS |
682 | * Returns pollmask value |
683 | * | |
684 | * COMMENTARY: | |
685 | * It appears that the usual socket locking mechanisms are not useful here | |
686 | * since the pollmask info is potentially out-of-date the moment this routine | |
687 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
688 | * to handle any preventable race conditions, so TIPC will do the same ... | |
689 | * | |
f662c070 AS |
690 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
691 | * imply that the operation will succeed, merely that it should be performed | |
692 | * and will not block. | |
b97bf3fd | 693 | */ |
247f0f3c YX |
694 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
695 | poll_table *wait) | |
b97bf3fd | 696 | { |
9b674e82 | 697 | struct sock *sk = sock->sk; |
58ed9442 | 698 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 699 | u32 mask = 0; |
9b674e82 | 700 | |
f288bef4 | 701 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 702 | |
6f00089c PB |
703 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
704 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
705 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
706 | mask |= POLLHUP; | |
707 | ||
f40acbaf PB |
708 | switch (sk->sk_state) { |
709 | case TIPC_ESTABLISHED: | |
365ad353 | 710 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
f662c070 | 711 | mask |= POLLOUT; |
f40acbaf PB |
712 | /* fall thru' */ |
713 | case TIPC_LISTEN: | |
714 | case TIPC_CONNECTING: | |
f662c070 AS |
715 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
716 | mask |= (POLLIN | POLLRDNORM); | |
f40acbaf PB |
717 | break; |
718 | case TIPC_OPEN: | |
365ad353 | 719 | if (!tsk->cong_link_cnt) |
f40acbaf PB |
720 | mask |= POLLOUT; |
721 | if (tipc_sk_type_connectionless(sk) && | |
722 | (!skb_queue_empty(&sk->sk_receive_queue))) | |
723 | mask |= (POLLIN | POLLRDNORM); | |
724 | break; | |
725 | case TIPC_DISCONNECTING: | |
726 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
727 | break; | |
f662c070 | 728 | } |
9b674e82 AS |
729 | |
730 | return mask; | |
b97bf3fd PL |
731 | } |
732 | ||
0abd8ff2 JPM |
733 | /** |
734 | * tipc_sendmcast - send multicast message | |
735 | * @sock: socket structure | |
736 | * @seq: destination address | |
562640f3 | 737 | * @msg: message to send |
365ad353 JPM |
738 | * @dlen: length of data to send |
739 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
740 | * |
741 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
742 | * Returns the number of bytes sent on success, or errno | |
743 | */ | |
744 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 745 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
746 | { |
747 | struct sock *sk = sock->sk; | |
c5898636 | 748 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 749 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 750 | struct net *net = sock_net(sk); |
365ad353 | 751 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 752 | struct tipc_mc_method *method = &tsk->mc_method; |
a853e4c6 | 753 | u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); |
365ad353 | 754 | struct sk_buff_head pkts; |
a853e4c6 | 755 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
756 | int rc; |
757 | ||
a853e4c6 | 758 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
759 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
760 | if (unlikely(rc)) | |
761 | return rc; | |
f214fc40 | 762 | |
a853e4c6 JPM |
763 | /* Lookup destination nodes */ |
764 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
765 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
766 | seq->upper, domain, &dsts); | |
767 | if (!dsts.local && !dsts.remote) | |
768 | return -EHOSTUNREACH; | |
769 | ||
770 | /* Build message header */ | |
365ad353 | 771 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 772 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
773 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
774 | msg_set_destport(hdr, 0); | |
775 | msg_set_destnode(hdr, 0); | |
776 | msg_set_nametype(hdr, seq->type); | |
777 | msg_set_namelower(hdr, seq->lower); | |
778 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 779 | |
a853e4c6 | 780 | /* Build message as chain of buffers */ |
365ad353 JPM |
781 | skb_queue_head_init(&pkts); |
782 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
0abd8ff2 | 783 | |
a853e4c6 JPM |
784 | /* Send message if build was successful */ |
785 | if (unlikely(rc == dlen)) | |
01fd12bb | 786 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 JPM |
787 | &tsk->cong_link_cnt); |
788 | ||
789 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
790 | |
791 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
792 | } |
793 | ||
cb1b7280 JPM |
794 | /** |
795 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
796 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
797 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
798 | * | |
799 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 800 | */ |
cb1b7280 JPM |
801 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
802 | struct sk_buff_head *inputq) | |
078bec82 | 803 | { |
cb1b7280 | 804 | struct tipc_msg *msg; |
4d8642d8 | 805 | struct list_head dports; |
3c724acd | 806 | u32 portid; |
078bec82 | 807 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
808 | struct sk_buff_head tmpq; |
809 | uint hsz; | |
810 | struct sk_buff *skb, *_skb; | |
3c724acd | 811 | |
cb1b7280 | 812 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 813 | INIT_LIST_HEAD(&dports); |
078bec82 | 814 | |
cb1b7280 JPM |
815 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
816 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
817 | msg = buf_msg(skb); | |
818 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
819 | ||
820 | if (in_own_node(net, msg_orignode(msg))) | |
821 | scope = TIPC_NODE_SCOPE; | |
822 | ||
823 | /* Create destination port list and message clones: */ | |
824 | tipc_nametbl_mc_translate(net, | |
825 | msg_nametype(msg), msg_namelower(msg), | |
826 | msg_nameupper(msg), scope, &dports); | |
4d8642d8 JPM |
827 | portid = u32_pop(&dports); |
828 | for (; portid; portid = u32_pop(&dports)) { | |
cb1b7280 JPM |
829 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); |
830 | if (_skb) { | |
831 | msg_set_destport(buf_msg(_skb), portid); | |
832 | __skb_queue_tail(&tmpq, _skb); | |
833 | continue; | |
834 | } | |
835 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 836 | } |
cb1b7280 JPM |
837 | /* Append to inputq if not already done by other thread */ |
838 | spin_lock_bh(&inputq->lock); | |
839 | if (skb_peek(arrvq) == skb) { | |
840 | skb_queue_splice_tail_init(&tmpq, inputq); | |
841 | kfree_skb(__skb_dequeue(arrvq)); | |
842 | } | |
843 | spin_unlock_bh(&inputq->lock); | |
844 | __skb_queue_purge(&tmpq); | |
845 | kfree_skb(skb); | |
078bec82 | 846 | } |
cb1b7280 | 847 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
848 | } |
849 | ||
ac0074ee JPM |
850 | /** |
851 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
852 | * @tsk: receiving socket | |
bcd3ffd4 | 853 | * @skb: pointer to message buffer. |
ac0074ee | 854 | */ |
f1d048f2 JPM |
855 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
856 | struct sk_buff_head *xmitq) | |
ac0074ee | 857 | { |
bcd3ffd4 | 858 | struct sock *sk = &tsk->sk; |
f1d048f2 | 859 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
860 | struct tipc_msg *hdr = buf_msg(skb); |
861 | int mtyp = msg_type(hdr); | |
10724cc7 | 862 | bool conn_cong; |
bcd3ffd4 | 863 | |
ac0074ee | 864 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 865 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
866 | goto exit; |
867 | ||
8ea642ee | 868 | tsk->probe_unacked = false; |
ac0074ee | 869 | |
bcd3ffd4 JPM |
870 | if (mtyp == CONN_PROBE) { |
871 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
872 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
873 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
874 | return; |
875 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 876 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
877 | tsk->snt_unacked -= msg_conn_ack(hdr); |
878 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
879 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 880 | if (conn_cong) |
bcd3ffd4 JPM |
881 | sk->sk_write_space(sk); |
882 | } else if (mtyp != CONN_PROBE_REPLY) { | |
883 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 884 | } |
ac0074ee | 885 | exit: |
bcd3ffd4 | 886 | kfree_skb(skb); |
ac0074ee JPM |
887 | } |
888 | ||
b97bf3fd | 889 | /** |
247f0f3c | 890 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
891 | * @sock: socket structure |
892 | * @m: message to send | |
e2dafe87 | 893 | * @dsz: amount of user data to be sent |
c4307285 | 894 | * |
b97bf3fd | 895 | * Message must have an destination specified explicitly. |
c4307285 | 896 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
897 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
898 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 899 | * |
b97bf3fd PL |
900 | * Returns the number of bytes sent on success, or errno otherwise |
901 | */ | |
1b784140 | 902 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 903 | struct msghdr *m, size_t dsz) |
39a0295f YX |
904 | { |
905 | struct sock *sk = sock->sk; | |
906 | int ret; | |
907 | ||
908 | lock_sock(sk); | |
909 | ret = __tipc_sendmsg(sock, m, dsz); | |
910 | release_sock(sk); | |
911 | ||
912 | return ret; | |
913 | } | |
914 | ||
365ad353 | 915 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 916 | { |
0c3141e9 | 917 | struct sock *sk = sock->sk; |
f2f9800d | 918 | struct net *net = sock_net(sk); |
365ad353 JPM |
919 | struct tipc_sock *tsk = tipc_sk(sk); |
920 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
921 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
922 | struct list_head *clinks = &tsk->cong_links; | |
923 | bool syn = !tipc_sk_type_connectionless(sk); | |
924 | struct tipc_msg *hdr = &tsk->phdr; | |
f2f8036e | 925 | struct tipc_name_seq *seq; |
365ad353 JPM |
926 | struct sk_buff_head pkts; |
927 | u32 type, inst, domain; | |
928 | u32 dnode, dport; | |
929 | int mtu, rc; | |
b97bf3fd | 930 | |
365ad353 | 931 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 932 | return -EMSGSIZE; |
365ad353 | 933 | |
f2f8036e | 934 | if (unlikely(!dest)) { |
365ad353 JPM |
935 | dest = &tsk->peer; |
936 | if (!syn || dest->family != AF_TIPC) | |
f2f8036e | 937 | return -EDESTADDRREQ; |
f2f8036e | 938 | } |
365ad353 JPM |
939 | |
940 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
941 | return -EINVAL; | |
942 | ||
943 | if (unlikely(dest->family != AF_TIPC)) | |
944 | return -EINVAL; | |
945 | ||
946 | if (unlikely(syn)) { | |
0c288c86 | 947 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 948 | return -EPIPE; |
438adcaf | 949 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
950 | return -EISCONN; |
951 | if (tsk->published) | |
952 | return -EOPNOTSUPP; | |
3388007b | 953 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
954 | tsk->conn_type = dest->addr.name.name.type; |
955 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 956 | } |
b97bf3fd | 957 | } |
e2dafe87 | 958 | |
365ad353 JPM |
959 | seq = &dest->addr.nameseq; |
960 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
961 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 962 | |
365ad353 JPM |
963 | if (dest->addrtype == TIPC_ADDR_NAME) { |
964 | type = dest->addr.name.name.type; | |
965 | inst = dest->addr.name.name.instance; | |
966 | domain = dest->addr.name.domain; | |
e2dafe87 | 967 | dnode = domain; |
365ad353 JPM |
968 | msg_set_type(hdr, TIPC_NAMED_MSG); |
969 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
970 | msg_set_nametype(hdr, type); | |
971 | msg_set_nameinst(hdr, inst); | |
972 | msg_set_lookup_scope(hdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 973 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
974 | msg_set_destnode(hdr, dnode); |
975 | msg_set_destport(hdr, dport); | |
39a0295f YX |
976 | if (unlikely(!dport && !dnode)) |
977 | return -EHOSTUNREACH; | |
365ad353 | 978 | |
e2dafe87 JPM |
979 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
980 | dnode = dest->addr.id.node; | |
365ad353 JPM |
981 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
982 | msg_set_lookup_scope(hdr, 0); | |
983 | msg_set_destnode(hdr, dnode); | |
984 | msg_set_destport(hdr, dest->addr.id.ref); | |
985 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
986 | } |
987 | ||
365ad353 JPM |
988 | /* Block or return if destination link is congested */ |
989 | rc = tipc_wait_for_cond(sock, &timeout, !u32_find(clinks, dnode)); | |
990 | if (unlikely(rc)) | |
991 | return rc; | |
992 | ||
993 | skb_queue_head_init(&pkts); | |
f2f9800d | 994 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
995 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
996 | if (unlikely(rc != dlen)) | |
39a0295f | 997 | return rc; |
e2dafe87 | 998 | |
365ad353 JPM |
999 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1000 | if (unlikely(rc == -ELINKCONG)) { | |
1001 | u32_push(clinks, dnode); | |
1002 | tsk->cong_link_cnt++; | |
1003 | rc = 0; | |
1004 | } | |
e2dafe87 | 1005 | |
365ad353 JPM |
1006 | if (unlikely(syn && !rc)) |
1007 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1008 | ||
1009 | return rc ? rc : dlen; | |
b97bf3fd PL |
1010 | } |
1011 | ||
c4307285 | 1012 | /** |
365ad353 | 1013 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1014 | * @sock: socket structure |
4ccfe5e0 JPM |
1015 | * @m: data to send |
1016 | * @dsz: total length of data to be transmitted | |
c4307285 | 1017 | * |
4ccfe5e0 | 1018 | * Used for SOCK_STREAM data. |
c4307285 | 1019 | * |
4ccfe5e0 JPM |
1020 | * Returns the number of bytes sent on success (or partial success), |
1021 | * or errno if no data sent | |
b97bf3fd | 1022 | */ |
365ad353 | 1023 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1024 | { |
1025 | struct sock *sk = sock->sk; | |
1026 | int ret; | |
1027 | ||
1028 | lock_sock(sk); | |
365ad353 | 1029 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1030 | release_sock(sk); |
1031 | ||
1032 | return ret; | |
1033 | } | |
1034 | ||
365ad353 | 1035 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1036 | { |
0c3141e9 | 1037 | struct sock *sk = sock->sk; |
342dfc30 | 1038 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1039 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1040 | struct tipc_sock *tsk = tipc_sk(sk); | |
1041 | struct tipc_msg *hdr = &tsk->phdr; | |
1042 | struct net *net = sock_net(sk); | |
1043 | struct sk_buff_head pkts; | |
1044 | u32 dnode = tsk_peer_node(tsk); | |
1045 | int send, sent = 0; | |
1046 | int rc = 0; | |
1d835874 | 1047 | |
365ad353 | 1048 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1049 | |
365ad353 JPM |
1050 | if (unlikely(dlen > INT_MAX)) |
1051 | return -EMSGSIZE; | |
4ccfe5e0 | 1052 | |
365ad353 JPM |
1053 | /* Handle implicit connection setup */ |
1054 | if (unlikely(dest)) { | |
1055 | rc = __tipc_sendmsg(sock, m, dlen); | |
1056 | if (dlen && (dlen == rc)) | |
1057 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); | |
39a0295f | 1058 | return rc; |
365ad353 | 1059 | } |
f214fc40 | 1060 | |
c4307285 | 1061 | do { |
365ad353 JPM |
1062 | rc = tipc_wait_for_cond(sock, &timeout, |
1063 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1064 | !tsk_conn_cong(tsk) && |
1065 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1066 | if (unlikely(rc)) |
1067 | break; | |
1068 | ||
1069 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1070 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1071 | if (unlikely(rc != send)) | |
1072 | break; | |
1073 | ||
1074 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1075 | if (unlikely(rc == -ELINKCONG)) { | |
1076 | tsk->cong_link_cnt = 1; | |
1077 | rc = 0; | |
1078 | } | |
1079 | if (likely(!rc)) { | |
1080 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1081 | sent += send; | |
1082 | } | |
1083 | } while (sent < dlen && !rc); | |
39a0295f | 1084 | |
365ad353 | 1085 | return rc ? rc : sent; |
b97bf3fd PL |
1086 | } |
1087 | ||
c4307285 | 1088 | /** |
4ccfe5e0 | 1089 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1090 | * @sock: socket structure |
4ccfe5e0 JPM |
1091 | * @m: message to send |
1092 | * @dsz: length of data to be transmitted | |
c4307285 | 1093 | * |
4ccfe5e0 | 1094 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1095 | * |
4ccfe5e0 | 1096 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1097 | */ |
1b784140 | 1098 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1099 | { |
4ccfe5e0 JPM |
1100 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1101 | return -EMSGSIZE; | |
b97bf3fd | 1102 | |
365ad353 | 1103 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1104 | } |
1105 | ||
dadebc00 | 1106 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1107 | */ |
301bae56 | 1108 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1109 | u32 peer_node) |
b97bf3fd | 1110 | { |
3721e9c7 YX |
1111 | struct sock *sk = &tsk->sk; |
1112 | struct net *net = sock_net(sk); | |
301bae56 | 1113 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1114 | |
dadebc00 JPM |
1115 | msg_set_destnode(msg, peer_node); |
1116 | msg_set_destport(msg, peer_port); | |
1117 | msg_set_type(msg, TIPC_CONN_MSG); | |
1118 | msg_set_lookup_scope(msg, 0); | |
1119 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1120 | |
360aab6b | 1121 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
8ea642ee | 1122 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1123 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1124 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1125 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1126 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1127 | return; | |
1128 | ||
1129 | /* Fall back to message based flow control */ | |
1130 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1131 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1132 | } |
1133 | ||
1134 | /** | |
1135 | * set_orig_addr - capture sender's address for received message | |
1136 | * @m: descriptor for message info | |
1137 | * @msg: received message header | |
c4307285 | 1138 | * |
b97bf3fd PL |
1139 | * Note: Address is not captured if not requested by receiver. |
1140 | */ | |
05790c64 | 1141 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1142 | { |
342dfc30 | 1143 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1144 | |
c4307285 | 1145 | if (addr) { |
b97bf3fd PL |
1146 | addr->family = AF_TIPC; |
1147 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1148 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1149 | addr->addr.id.ref = msg_origport(msg); |
1150 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1151 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1152 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1153 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1154 | } | |
1155 | } | |
1156 | ||
1157 | /** | |
301bae56 | 1158 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1159 | * @m: descriptor for message info |
1160 | * @msg: received message header | |
301bae56 | 1161 | * @tsk: TIPC port associated with message |
c4307285 | 1162 | * |
b97bf3fd | 1163 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1164 | * |
b97bf3fd PL |
1165 | * Returns 0 if successful, otherwise errno |
1166 | */ | |
301bae56 JPM |
1167 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1168 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1169 | { |
1170 | u32 anc_data[3]; | |
1171 | u32 err; | |
1172 | u32 dest_type; | |
3546c750 | 1173 | int has_name; |
b97bf3fd PL |
1174 | int res; |
1175 | ||
1176 | if (likely(m->msg_controllen == 0)) | |
1177 | return 0; | |
1178 | ||
1179 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1180 | err = msg ? msg_errcode(msg) : 0; |
1181 | if (unlikely(err)) { | |
1182 | anc_data[0] = err; | |
1183 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1184 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1185 | if (res) | |
b97bf3fd | 1186 | return res; |
2db9983a AS |
1187 | if (anc_data[1]) { |
1188 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1189 | msg_data(msg)); | |
1190 | if (res) | |
1191 | return res; | |
1192 | } | |
b97bf3fd PL |
1193 | } |
1194 | ||
1195 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1196 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1197 | switch (dest_type) { | |
1198 | case TIPC_NAMED_MSG: | |
3546c750 | 1199 | has_name = 1; |
b97bf3fd PL |
1200 | anc_data[0] = msg_nametype(msg); |
1201 | anc_data[1] = msg_namelower(msg); | |
1202 | anc_data[2] = msg_namelower(msg); | |
1203 | break; | |
1204 | case TIPC_MCAST_MSG: | |
3546c750 | 1205 | has_name = 1; |
b97bf3fd PL |
1206 | anc_data[0] = msg_nametype(msg); |
1207 | anc_data[1] = msg_namelower(msg); | |
1208 | anc_data[2] = msg_nameupper(msg); | |
1209 | break; | |
1210 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1211 | has_name = (tsk->conn_type != 0); |
1212 | anc_data[0] = tsk->conn_type; | |
1213 | anc_data[1] = tsk->conn_instance; | |
1214 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1215 | break; |
1216 | default: | |
3546c750 | 1217 | has_name = 0; |
b97bf3fd | 1218 | } |
2db9983a AS |
1219 | if (has_name) { |
1220 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1221 | if (res) | |
1222 | return res; | |
1223 | } | |
b97bf3fd PL |
1224 | |
1225 | return 0; | |
1226 | } | |
1227 | ||
10724cc7 | 1228 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1229 | { |
d6fb7e9c PB |
1230 | struct sock *sk = &tsk->sk; |
1231 | struct net *net = sock_net(sk); | |
a6ca1094 | 1232 | struct sk_buff *skb = NULL; |
739f5e4e | 1233 | struct tipc_msg *msg; |
301bae56 JPM |
1234 | u32 peer_port = tsk_peer_port(tsk); |
1235 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1236 | |
d6fb7e9c | 1237 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1238 | return; |
c5898636 JPM |
1239 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1240 | dnode, tsk_own_node(tsk), peer_port, | |
1241 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1242 | if (!skb) |
739f5e4e | 1243 | return; |
a6ca1094 | 1244 | msg = buf_msg(skb); |
10724cc7 JPM |
1245 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1246 | tsk->rcv_unacked = 0; | |
1247 | ||
1248 | /* Adjust to and advertize the correct window limit */ | |
1249 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1250 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1251 | msg_set_adv_win(msg, tsk->rcv_win); | |
1252 | } | |
af9b028e | 1253 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1254 | } |
1255 | ||
85d3fc94 | 1256 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1257 | { |
1258 | struct sock *sk = sock->sk; | |
1259 | DEFINE_WAIT(wait); | |
85d3fc94 | 1260 | long timeo = *timeop; |
9bbb4ecc YX |
1261 | int err; |
1262 | ||
1263 | for (;;) { | |
1264 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1265 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1266 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1267 | err = -ENOTCONN; |
1268 | break; | |
1269 | } | |
1270 | release_sock(sk); | |
1271 | timeo = schedule_timeout(timeo); | |
1272 | lock_sock(sk); | |
1273 | } | |
1274 | err = 0; | |
1275 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1276 | break; | |
9bbb4ecc YX |
1277 | err = -EAGAIN; |
1278 | if (!timeo) | |
1279 | break; | |
143fe22f EH |
1280 | err = sock_intr_errno(timeo); |
1281 | if (signal_pending(current)) | |
1282 | break; | |
9bbb4ecc YX |
1283 | } |
1284 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1285 | *timeop = timeo; |
9bbb4ecc YX |
1286 | return err; |
1287 | } | |
1288 | ||
c4307285 | 1289 | /** |
247f0f3c | 1290 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1291 | * @m: descriptor for message info |
1292 | * @buf_len: total size of user buffer area | |
1293 | * @flags: receive flags | |
c4307285 | 1294 | * |
b97bf3fd PL |
1295 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1296 | * If the complete message doesn't fit in user area, truncate it. | |
1297 | * | |
1298 | * Returns size of returned message data, errno otherwise | |
1299 | */ | |
1b784140 YX |
1300 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1301 | int flags) | |
b97bf3fd | 1302 | { |
0c3141e9 | 1303 | struct sock *sk = sock->sk; |
58ed9442 | 1304 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1305 | struct sk_buff *buf; |
1306 | struct tipc_msg *msg; | |
c752023a | 1307 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
9bbb4ecc | 1308 | long timeo; |
b97bf3fd PL |
1309 | unsigned int sz; |
1310 | u32 err; | |
10724cc7 | 1311 | int res, hlen; |
b97bf3fd | 1312 | |
0c3141e9 | 1313 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1314 | if (unlikely(!buf_len)) |
1315 | return -EINVAL; | |
1316 | ||
0c3141e9 | 1317 | lock_sock(sk); |
b97bf3fd | 1318 | |
438adcaf | 1319 | if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1320 | res = -ENOTCONN; |
b97bf3fd PL |
1321 | goto exit; |
1322 | } | |
1323 | ||
9bbb4ecc | 1324 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1325 | restart: |
b97bf3fd | 1326 | |
0c3141e9 | 1327 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1328 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1329 | if (res) |
1330 | goto exit; | |
b97bf3fd | 1331 | |
0c3141e9 | 1332 | /* Look at first message in receive queue */ |
0c3141e9 | 1333 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1334 | msg = buf_msg(buf); |
1335 | sz = msg_data_sz(msg); | |
10724cc7 | 1336 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1337 | err = msg_errcode(msg); |
1338 | ||
b97bf3fd | 1339 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1340 | if ((!sz) && (!err)) { |
2e84c60b | 1341 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1342 | goto restart; |
1343 | } | |
1344 | ||
1345 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1346 | set_orig_addr(m, msg); |
1347 | ||
1348 | /* Capture ancillary data (optional) */ | |
301bae56 | 1349 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1350 | if (res) |
b97bf3fd PL |
1351 | goto exit; |
1352 | ||
1353 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1354 | if (!err) { |
1355 | if (unlikely(buf_len < sz)) { | |
1356 | sz = buf_len; | |
1357 | m->msg_flags |= MSG_TRUNC; | |
1358 | } | |
10724cc7 | 1359 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1360 | if (res) |
b97bf3fd | 1361 | goto exit; |
b97bf3fd PL |
1362 | res = sz; |
1363 | } else { | |
c752023a PB |
1364 | if (is_connectionless || err == TIPC_CONN_SHUTDOWN || |
1365 | m->msg_control) | |
b97bf3fd PL |
1366 | res = 0; |
1367 | else | |
1368 | res = -ECONNRESET; | |
1369 | } | |
1370 | ||
10724cc7 JPM |
1371 | if (unlikely(flags & MSG_PEEK)) |
1372 | goto exit; | |
1373 | ||
c752023a | 1374 | if (likely(!is_connectionless)) { |
10724cc7 JPM |
1375 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); |
1376 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1377 | tipc_sk_send_ack(tsk); | |
c4307285 | 1378 | } |
10724cc7 | 1379 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1380 | exit: |
0c3141e9 | 1381 | release_sock(sk); |
b97bf3fd PL |
1382 | return res; |
1383 | } | |
1384 | ||
c4307285 | 1385 | /** |
247f0f3c | 1386 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1387 | * @m: descriptor for message info |
1388 | * @buf_len: total size of user buffer area | |
1389 | * @flags: receive flags | |
c4307285 YH |
1390 | * |
1391 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1392 | * will optionally wait for more; never truncates data. |
1393 | * | |
1394 | * Returns size of returned message data, errno otherwise | |
1395 | */ | |
1b784140 YX |
1396 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1397 | size_t buf_len, int flags) | |
b97bf3fd | 1398 | { |
0c3141e9 | 1399 | struct sock *sk = sock->sk; |
58ed9442 | 1400 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1401 | struct sk_buff *buf; |
1402 | struct tipc_msg *msg; | |
9bbb4ecc | 1403 | long timeo; |
b97bf3fd | 1404 | unsigned int sz; |
ba8aebe9 | 1405 | int target; |
b97bf3fd | 1406 | int sz_copied = 0; |
b97bf3fd | 1407 | u32 err; |
10724cc7 | 1408 | int res = 0, hlen; |
b97bf3fd | 1409 | |
0c3141e9 | 1410 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1411 | if (unlikely(!buf_len)) |
1412 | return -EINVAL; | |
1413 | ||
0c3141e9 | 1414 | lock_sock(sk); |
b97bf3fd | 1415 | |
438adcaf | 1416 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1417 | res = -ENOTCONN; |
b97bf3fd PL |
1418 | goto exit; |
1419 | } | |
1420 | ||
3720d40b | 1421 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1422 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1423 | |
617d3c7a | 1424 | restart: |
0c3141e9 | 1425 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1426 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1427 | if (res) |
1428 | goto exit; | |
b97bf3fd | 1429 | |
0c3141e9 | 1430 | /* Look at first message in receive queue */ |
0c3141e9 | 1431 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1432 | msg = buf_msg(buf); |
1433 | sz = msg_data_sz(msg); | |
10724cc7 | 1434 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1435 | err = msg_errcode(msg); |
1436 | ||
1437 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1438 | if ((!sz) && (!err)) { |
2e84c60b | 1439 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1440 | goto restart; |
1441 | } | |
1442 | ||
1443 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1444 | if (sz_copied == 0) { |
1445 | set_orig_addr(m, msg); | |
301bae56 | 1446 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1447 | if (res) |
b97bf3fd PL |
1448 | goto exit; |
1449 | } | |
1450 | ||
1451 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1452 | if (!err) { |
ba8aebe9 PB |
1453 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1454 | u32 needed; | |
1455 | int sz_to_copy; | |
b97bf3fd | 1456 | |
0232fd0a | 1457 | sz -= offset; |
b97bf3fd | 1458 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1459 | sz_to_copy = min(sz, needed); |
0232fd0a | 1460 | |
10724cc7 | 1461 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1462 | if (res) |
b97bf3fd | 1463 | goto exit; |
0232fd0a | 1464 | |
b97bf3fd PL |
1465 | sz_copied += sz_to_copy; |
1466 | ||
1467 | if (sz_to_copy < sz) { | |
1468 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1469 | TIPC_SKB_CB(buf)->bytes_read = |
1470 | offset + sz_to_copy; | |
b97bf3fd PL |
1471 | goto exit; |
1472 | } | |
b97bf3fd PL |
1473 | } else { |
1474 | if (sz_copied != 0) | |
1475 | goto exit; /* can't add error msg to valid data */ | |
1476 | ||
1477 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1478 | res = 0; | |
1479 | else | |
1480 | res = -ECONNRESET; | |
1481 | } | |
1482 | ||
10724cc7 JPM |
1483 | if (unlikely(flags & MSG_PEEK)) |
1484 | goto exit; | |
1485 | ||
1486 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1487 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1488 | tipc_sk_send_ack(tsk); | |
1489 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1490 | |
1491 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1492 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1493 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1494 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1495 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1496 | goto restart; |
1497 | ||
1498 | exit: | |
0c3141e9 | 1499 | release_sock(sk); |
a3b0a5a9 | 1500 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1501 | } |
1502 | ||
f288bef4 YX |
1503 | /** |
1504 | * tipc_write_space - wake up thread if port congestion is released | |
1505 | * @sk: socket | |
1506 | */ | |
1507 | static void tipc_write_space(struct sock *sk) | |
1508 | { | |
1509 | struct socket_wq *wq; | |
1510 | ||
1511 | rcu_read_lock(); | |
1512 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1513 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1514 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1515 | POLLWRNORM | POLLWRBAND); | |
1516 | rcu_read_unlock(); | |
1517 | } | |
1518 | ||
1519 | /** | |
1520 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1521 | * @sk: socket | |
1522 | * @len: the length of messages | |
1523 | */ | |
676d2369 | 1524 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1525 | { |
1526 | struct socket_wq *wq; | |
1527 | ||
1528 | rcu_read_lock(); | |
1529 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1530 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1531 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1532 | POLLRDNORM | POLLRDBAND); | |
1533 | rcu_read_unlock(); | |
1534 | } | |
1535 | ||
f4195d1e YX |
1536 | static void tipc_sock_destruct(struct sock *sk) |
1537 | { | |
1538 | __skb_queue_purge(&sk->sk_receive_queue); | |
1539 | } | |
1540 | ||
7e6c131e YX |
1541 | /** |
1542 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1543 | * @tsk: TIPC socket |
1186adf7 | 1544 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1545 | * |
cda3696d | 1546 | * Returns true if everything ok, false otherwise |
7e6c131e | 1547 | */ |
cda3696d | 1548 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1549 | { |
58ed9442 | 1550 | struct sock *sk = &tsk->sk; |
f2f9800d | 1551 | struct net *net = sock_net(sk); |
cda3696d | 1552 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1553 | |
cda3696d JPM |
1554 | if (unlikely(msg_mcast(hdr))) |
1555 | return false; | |
7e6c131e | 1556 | |
99a20889 PB |
1557 | switch (sk->sk_state) { |
1558 | case TIPC_CONNECTING: | |
cda3696d JPM |
1559 | /* Accept only ACK or NACK message */ |
1560 | if (unlikely(!msg_connected(hdr))) | |
1561 | return false; | |
dadebc00 | 1562 | |
cda3696d | 1563 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1564 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1565 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1566 | return true; |
584d24b3 YX |
1567 | } |
1568 | ||
cda3696d | 1569 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1570 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1571 | sk->sk_err = EINVAL; |
cda3696d | 1572 | return true; |
584d24b3 YX |
1573 | } |
1574 | ||
cda3696d JPM |
1575 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1576 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 1577 | |
cda3696d JPM |
1578 | /* If 'ACK+' message, add to socket receive queue */ |
1579 | if (msg_data_sz(hdr)) | |
1580 | return true; | |
1581 | ||
1582 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1583 | if (waitqueue_active(sk_sleep(sk))) | |
1584 | wake_up_interruptible(sk_sleep(sk)); | |
1585 | ||
1586 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1587 | msg_set_dest_droppable(hdr, 1); | |
1588 | return false; | |
cda3696d | 1589 | |
438adcaf | 1590 | case TIPC_OPEN: |
9fd4b070 | 1591 | case TIPC_DISCONNECTING: |
438adcaf PB |
1592 | break; |
1593 | case TIPC_LISTEN: | |
7e6c131e | 1594 | /* Accept only SYN message */ |
cda3696d JPM |
1595 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1596 | return true; | |
7e6c131e | 1597 | break; |
f40acbaf PB |
1598 | case TIPC_ESTABLISHED: |
1599 | /* Accept only connection-based messages sent by peer */ | |
1600 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
1601 | return false; | |
1602 | ||
1603 | if (unlikely(msg_errcode(hdr))) { | |
1604 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1605 | /* Let timer expire on it's own */ | |
1606 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1607 | tsk->portid); | |
1608 | sk->sk_state_change(sk); | |
1609 | } | |
1610 | return true; | |
7e6c131e | 1611 | default: |
438adcaf | 1612 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 1613 | } |
438adcaf | 1614 | |
cda3696d | 1615 | return false; |
7e6c131e YX |
1616 | } |
1617 | ||
aba79f33 YX |
1618 | /** |
1619 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1620 | * @sk: socket | |
10724cc7 | 1621 | * @skb: message |
aba79f33 | 1622 | * |
10724cc7 JPM |
1623 | * For connection oriented messages, irrespective of importance, |
1624 | * default queue limit is 2 MB. | |
aba79f33 | 1625 | * |
10724cc7 JPM |
1626 | * For connectionless messages, queue limits are based on message |
1627 | * importance as follows: | |
aba79f33 | 1628 | * |
10724cc7 JPM |
1629 | * TIPC_LOW_IMPORTANCE (2 MB) |
1630 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1631 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1632 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1633 | * |
1634 | * Returns overload limit according to corresponding message importance | |
1635 | */ | |
10724cc7 | 1636 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1637 | { |
10724cc7 JPM |
1638 | struct tipc_sock *tsk = tipc_sk(sk); |
1639 | struct tipc_msg *hdr = buf_msg(skb); | |
1640 | ||
1641 | if (unlikely(!msg_connected(hdr))) | |
1642 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1643 | |
10724cc7 JPM |
1644 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1645 | return sk->sk_rcvbuf; | |
0cee6bbe | 1646 | |
10724cc7 | 1647 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1648 | } |
1649 | ||
c4307285 | 1650 | /** |
0c3141e9 AS |
1651 | * filter_rcv - validate incoming message |
1652 | * @sk: socket | |
cda3696d | 1653 | * @skb: pointer to message. |
c4307285 | 1654 | * |
0c3141e9 AS |
1655 | * Enqueues message on receive queue if acceptable; optionally handles |
1656 | * disconnect indication for a connected socket. | |
1657 | * | |
1186adf7 | 1658 | * Called with socket lock already taken |
c4307285 | 1659 | * |
cda3696d | 1660 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1661 | */ |
f1d048f2 JPM |
1662 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1663 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1664 | { |
58ed9442 | 1665 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1666 | struct tipc_msg *hdr = buf_msg(skb); |
1667 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1668 | int err = TIPC_OK; | |
1669 | int usr = msg_user(hdr); | |
365ad353 | 1670 | u32 onode; |
b97bf3fd | 1671 | |
cda3696d | 1672 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1673 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1674 | return false; |
1186adf7 | 1675 | } |
ec8a2e56 | 1676 | |
cda3696d | 1677 | if (unlikely(usr == SOCK_WAKEUP)) { |
365ad353 | 1678 | onode = msg_orignode(hdr); |
cda3696d | 1679 | kfree_skb(skb); |
365ad353 JPM |
1680 | u32_del(&tsk->cong_links, onode); |
1681 | tsk->cong_link_cnt--; | |
50100a5e | 1682 | sk->sk_write_space(sk); |
cda3696d | 1683 | return false; |
50100a5e JPM |
1684 | } |
1685 | ||
cda3696d JPM |
1686 | /* Drop if illegal message type */ |
1687 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1688 | kfree_skb(skb); | |
1689 | return false; | |
1690 | } | |
0c3141e9 | 1691 | |
cda3696d | 1692 | /* Reject if wrong message type for current socket state */ |
c752023a | 1693 | if (tipc_sk_type_connectionless(sk)) { |
cda3696d JPM |
1694 | if (msg_connected(hdr)) { |
1695 | err = TIPC_ERR_NO_PORT; | |
1696 | goto reject; | |
1697 | } | |
1698 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1699 | err = TIPC_ERR_NO_PORT; | |
1700 | goto reject; | |
b97bf3fd PL |
1701 | } |
1702 | ||
1703 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1704 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1705 | err = TIPC_ERR_OVERLOAD; | |
1706 | goto reject; | |
1707 | } | |
b97bf3fd | 1708 | |
aba79f33 | 1709 | /* Enqueue message */ |
ba8aebe9 | 1710 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1711 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1712 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1713 | |
676d2369 | 1714 | sk->sk_data_ready(sk); |
cda3696d JPM |
1715 | return true; |
1716 | ||
1717 | reject: | |
f1d048f2 JPM |
1718 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1719 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1720 | return false; |
0c3141e9 | 1721 | } |
b97bf3fd | 1722 | |
0c3141e9 | 1723 | /** |
4f4482dc | 1724 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1725 | * @sk: socket |
a6ca1094 | 1726 | * @skb: message |
0c3141e9 | 1727 | * |
e3a77561 | 1728 | * Caller must hold socket lock |
0c3141e9 AS |
1729 | * |
1730 | * Returns 0 | |
1731 | */ | |
a6ca1094 | 1732 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1733 | { |
cda3696d | 1734 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1735 | struct sk_buff_head xmitq; |
1736 | u32 dnode, selector; | |
0c3141e9 | 1737 | |
f1d048f2 JPM |
1738 | __skb_queue_head_init(&xmitq); |
1739 | ||
1740 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1741 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1742 | return 0; |
1743 | } | |
1744 | ||
1745 | if (skb_queue_empty(&xmitq)) | |
1746 | return 0; | |
1747 | ||
1748 | /* Send response/rejected message */ | |
1749 | skb = __skb_dequeue(&xmitq); | |
1750 | dnode = msg_destnode(buf_msg(skb)); | |
1751 | selector = msg_origport(buf_msg(skb)); | |
1752 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1753 | return 0; |
1754 | } | |
1755 | ||
d570d864 | 1756 | /** |
c637c103 JPM |
1757 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1758 | * inputq and try adding them to socket or backlog queue | |
1759 | * @inputq: list of incoming buffers with potentially different destinations | |
1760 | * @sk: socket where the buffers should be enqueued | |
1761 | * @dport: port number for the socket | |
d570d864 JPM |
1762 | * |
1763 | * Caller must hold socket lock | |
d570d864 | 1764 | */ |
cda3696d | 1765 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1766 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1767 | { |
f1d048f2 JPM |
1768 | unsigned long time_limit = jiffies + 2; |
1769 | struct sk_buff *skb; | |
d570d864 JPM |
1770 | unsigned int lim; |
1771 | atomic_t *dcnt; | |
f1d048f2 | 1772 | u32 onode; |
c637c103 JPM |
1773 | |
1774 | while (skb_queue_len(inputq)) { | |
51a00daf | 1775 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1776 | return; |
1777 | ||
c637c103 JPM |
1778 | skb = tipc_skb_dequeue(inputq, dport); |
1779 | if (unlikely(!skb)) | |
cda3696d JPM |
1780 | return; |
1781 | ||
1782 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1783 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1784 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1785 | continue; |
c637c103 | 1786 | } |
cda3696d JPM |
1787 | |
1788 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1789 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1790 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1791 | atomic_set(dcnt, 0); |
1792 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1793 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1794 | continue; | |
cda3696d JPM |
1795 | |
1796 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1797 | onode = tipc_own_addr(sock_net(sk)); |
1798 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1799 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1800 | break; |
c637c103 | 1801 | } |
d570d864 JPM |
1802 | } |
1803 | ||
0c3141e9 | 1804 | /** |
c637c103 JPM |
1805 | * tipc_sk_rcv - handle a chain of incoming buffers |
1806 | * @inputq: buffer list containing the buffers | |
1807 | * Consumes all buffers in list until inputq is empty | |
1808 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1809 | */ |
cda3696d | 1810 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1811 | { |
f1d048f2 | 1812 | struct sk_buff_head xmitq; |
c637c103 | 1813 | u32 dnode, dport = 0; |
9871b27f | 1814 | int err; |
9816f061 | 1815 | struct tipc_sock *tsk; |
9816f061 | 1816 | struct sock *sk; |
cda3696d | 1817 | struct sk_buff *skb; |
9816f061 | 1818 | |
f1d048f2 | 1819 | __skb_queue_head_init(&xmitq); |
c637c103 | 1820 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1821 | dport = tipc_skb_peek_port(inputq, dport); |
1822 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1823 | |
c637c103 JPM |
1824 | if (likely(tsk)) { |
1825 | sk = &tsk->sk; | |
1826 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1827 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1828 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1829 | } |
f1d048f2 JPM |
1830 | /* Send pending response/rejected messages, if any */ |
1831 | while ((skb = __skb_dequeue(&xmitq))) { | |
1832 | dnode = msg_destnode(buf_msg(skb)); | |
1833 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1834 | } | |
c637c103 | 1835 | sock_put(sk); |
c637c103 | 1836 | continue; |
c637c103 | 1837 | } |
cda3696d JPM |
1838 | |
1839 | /* No destination socket => dequeue skb if still there */ | |
1840 | skb = tipc_skb_dequeue(inputq, dport); | |
1841 | if (!skb) | |
1842 | return; | |
1843 | ||
1844 | /* Try secondary lookup if unresolved named message */ | |
1845 | err = TIPC_ERR_NO_PORT; | |
1846 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1847 | goto xmit; | |
1848 | ||
1849 | /* Prepare for message rejection */ | |
1850 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1851 | continue; |
e3a77561 | 1852 | xmit: |
cda3696d | 1853 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1854 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1855 | } |
b97bf3fd PL |
1856 | } |
1857 | ||
78eb3a53 YX |
1858 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1859 | { | |
d9dc8b0f | 1860 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 1861 | struct sock *sk = sock->sk; |
78eb3a53 YX |
1862 | int done; |
1863 | ||
1864 | do { | |
1865 | int err = sock_error(sk); | |
1866 | if (err) | |
1867 | return err; | |
1868 | if (!*timeo_p) | |
1869 | return -ETIMEDOUT; | |
1870 | if (signal_pending(current)) | |
1871 | return sock_intr_errno(*timeo_p); | |
1872 | ||
d9dc8b0f | 1873 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 1874 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
1875 | sk->sk_state != TIPC_CONNECTING, &wait); |
1876 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
1877 | } while (!done); |
1878 | return 0; | |
1879 | } | |
1880 | ||
b97bf3fd | 1881 | /** |
247f0f3c | 1882 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1883 | * @sock: socket structure |
1884 | * @dest: socket address for destination port | |
1885 | * @destlen: size of socket address data structure | |
0c3141e9 | 1886 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1887 | * |
1888 | * Returns 0 on success, errno otherwise | |
1889 | */ | |
247f0f3c YX |
1890 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1891 | int destlen, int flags) | |
b97bf3fd | 1892 | { |
0c3141e9 | 1893 | struct sock *sk = sock->sk; |
f2f8036e | 1894 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1895 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1896 | struct msghdr m = {NULL,}; | |
f2f8036e | 1897 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 1898 | int previous; |
f2f8036e | 1899 | int res = 0; |
b89741a0 | 1900 | |
0c3141e9 AS |
1901 | lock_sock(sk); |
1902 | ||
f2f8036e | 1903 | /* DGRAM/RDM connect(), just save the destaddr */ |
c752023a | 1904 | if (tipc_sk_type_connectionless(sk)) { |
f2f8036e | 1905 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1906 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1907 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1908 | res = -EINVAL; | |
f2f8036e | 1909 | } else { |
aeda16b6 | 1910 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1911 | } |
0c3141e9 AS |
1912 | goto exit; |
1913 | } | |
b89741a0 | 1914 | |
b89741a0 AS |
1915 | /* |
1916 | * Reject connection attempt using multicast address | |
1917 | * | |
1918 | * Note: send_msg() validates the rest of the address fields, | |
1919 | * so there's no need to do it here | |
1920 | */ | |
0c3141e9 AS |
1921 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1922 | res = -EINVAL; | |
1923 | goto exit; | |
1924 | } | |
1925 | ||
99a20889 | 1926 | previous = sk->sk_state; |
438adcaf PB |
1927 | |
1928 | switch (sk->sk_state) { | |
1929 | case TIPC_OPEN: | |
584d24b3 YX |
1930 | /* Send a 'SYN-' to destination */ |
1931 | m.msg_name = dest; | |
1932 | m.msg_namelen = destlen; | |
1933 | ||
1934 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1935 | * indicate send_msg() is never blocked. | |
1936 | */ | |
1937 | if (!timeout) | |
1938 | m.msg_flags = MSG_DONTWAIT; | |
1939 | ||
39a0295f | 1940 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1941 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1942 | goto exit; | |
1943 | ||
99a20889 | 1944 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
1945 | * difference is that return value in non-blocking |
1946 | * case is EINPROGRESS, rather than EALREADY. | |
1947 | */ | |
1948 | res = -EINPROGRESS; | |
99a20889 PB |
1949 | /* fall thru' */ |
1950 | case TIPC_CONNECTING: | |
1951 | if (!timeout) { | |
1952 | if (previous == TIPC_CONNECTING) | |
1953 | res = -EALREADY; | |
78eb3a53 | 1954 | goto exit; |
99a20889 | 1955 | } |
78eb3a53 YX |
1956 | timeout = msecs_to_jiffies(timeout); |
1957 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1958 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
1959 | break; |
1960 | case TIPC_ESTABLISHED: | |
584d24b3 | 1961 | res = -EISCONN; |
f40acbaf PB |
1962 | break; |
1963 | default: | |
584d24b3 | 1964 | res = -EINVAL; |
f40acbaf | 1965 | } |
99a20889 | 1966 | |
0c3141e9 AS |
1967 | exit: |
1968 | release_sock(sk); | |
b89741a0 | 1969 | return res; |
b97bf3fd PL |
1970 | } |
1971 | ||
c4307285 | 1972 | /** |
247f0f3c | 1973 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1974 | * @sock: socket structure |
1975 | * @len: (unused) | |
c4307285 | 1976 | * |
b97bf3fd PL |
1977 | * Returns 0 on success, errno otherwise |
1978 | */ | |
247f0f3c | 1979 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1980 | { |
0c3141e9 AS |
1981 | struct sock *sk = sock->sk; |
1982 | int res; | |
1983 | ||
1984 | lock_sock(sk); | |
0c288c86 | 1985 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 1986 | release_sock(sk); |
0c288c86 | 1987 | |
0c3141e9 | 1988 | return res; |
b97bf3fd PL |
1989 | } |
1990 | ||
6398e23c YX |
1991 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1992 | { | |
1993 | struct sock *sk = sock->sk; | |
1994 | DEFINE_WAIT(wait); | |
1995 | int err; | |
1996 | ||
1997 | /* True wake-one mechanism for incoming connections: only | |
1998 | * one process gets woken up, not the 'whole herd'. | |
1999 | * Since we do not 'race & poll' for established sockets | |
2000 | * anymore, the common case will execute the loop only once. | |
2001 | */ | |
2002 | for (;;) { | |
2003 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2004 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2005 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2006 | release_sock(sk); |
2007 | timeo = schedule_timeout(timeo); | |
2008 | lock_sock(sk); | |
2009 | } | |
2010 | err = 0; | |
2011 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2012 | break; | |
6398e23c YX |
2013 | err = -EAGAIN; |
2014 | if (!timeo) | |
2015 | break; | |
143fe22f EH |
2016 | err = sock_intr_errno(timeo); |
2017 | if (signal_pending(current)) | |
2018 | break; | |
6398e23c YX |
2019 | } |
2020 | finish_wait(sk_sleep(sk), &wait); | |
2021 | return err; | |
2022 | } | |
2023 | ||
c4307285 | 2024 | /** |
247f0f3c | 2025 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2026 | * @sock: listening socket |
2027 | * @newsock: new socket that is to be connected | |
2028 | * @flags: file-related flags associated with socket | |
c4307285 | 2029 | * |
b97bf3fd PL |
2030 | * Returns 0 on success, errno otherwise |
2031 | */ | |
247f0f3c | 2032 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2033 | { |
0fef8f20 | 2034 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2035 | struct sk_buff *buf; |
301bae56 | 2036 | struct tipc_sock *new_tsock; |
0fef8f20 | 2037 | struct tipc_msg *msg; |
6398e23c | 2038 | long timeo; |
0c3141e9 | 2039 | int res; |
b97bf3fd | 2040 | |
0c3141e9 | 2041 | lock_sock(sk); |
b97bf3fd | 2042 | |
0c288c86 | 2043 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2044 | res = -EINVAL; |
b97bf3fd PL |
2045 | goto exit; |
2046 | } | |
6398e23c YX |
2047 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2048 | res = tipc_wait_for_accept(sock, timeo); | |
2049 | if (res) | |
2050 | goto exit; | |
0c3141e9 AS |
2051 | |
2052 | buf = skb_peek(&sk->sk_receive_queue); | |
2053 | ||
cb5da847 | 2054 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2055 | if (res) |
2056 | goto exit; | |
fdd75ea8 | 2057 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2058 | |
0fef8f20 | 2059 | new_sk = new_sock->sk; |
301bae56 | 2060 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2061 | msg = buf_msg(buf); |
b97bf3fd | 2062 | |
0fef8f20 PG |
2063 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2064 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2065 | ||
2066 | /* | |
2067 | * Reject any stray messages received by new socket | |
2068 | * before the socket lock was taken (very, very unlikely) | |
2069 | */ | |
2e84c60b | 2070 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2071 | |
2072 | /* Connect new socket to it's peer */ | |
301bae56 | 2073 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2074 | |
301bae56 | 2075 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2076 | if (msg_named(msg)) { |
301bae56 JPM |
2077 | new_tsock->conn_type = msg_nametype(msg); |
2078 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2079 | } |
0fef8f20 PG |
2080 | |
2081 | /* | |
2082 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2083 | * Respond to 'SYN+' by queuing it on new socket. | |
2084 | */ | |
2085 | if (!msg_data_sz(msg)) { | |
2086 | struct msghdr m = {NULL,}; | |
2087 | ||
2e84c60b | 2088 | tsk_advance_rx_queue(sk); |
365ad353 | 2089 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2090 | } else { |
2091 | __skb_dequeue(&sk->sk_receive_queue); | |
2092 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2093 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2094 | } |
2095 | release_sock(new_sk); | |
b97bf3fd | 2096 | exit: |
0c3141e9 | 2097 | release_sock(sk); |
b97bf3fd PL |
2098 | return res; |
2099 | } | |
2100 | ||
2101 | /** | |
247f0f3c | 2102 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2103 | * @sock: socket structure |
e247a8f5 | 2104 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2105 | * |
2106 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2107 | * |
b97bf3fd PL |
2108 | * Returns 0 on success, errno otherwise |
2109 | */ | |
247f0f3c | 2110 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2111 | { |
0c3141e9 | 2112 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2113 | int res; |
2114 | ||
e247a8f5 AS |
2115 | if (how != SHUT_RDWR) |
2116 | return -EINVAL; | |
b97bf3fd | 2117 | |
0c3141e9 | 2118 | lock_sock(sk); |
b97bf3fd | 2119 | |
6f00089c PB |
2120 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2121 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2122 | |
6f00089c | 2123 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2124 | /* Discard any unreceived messages */ |
57467e56 | 2125 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2126 | |
2127 | /* Wake up anyone sleeping in poll */ | |
2128 | sk->sk_state_change(sk); | |
b97bf3fd | 2129 | res = 0; |
6f00089c | 2130 | } else { |
b97bf3fd PL |
2131 | res = -ENOTCONN; |
2132 | } | |
2133 | ||
0c3141e9 | 2134 | release_sock(sk); |
b97bf3fd PL |
2135 | return res; |
2136 | } | |
2137 | ||
f2f2a96a | 2138 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2139 | { |
f2f2a96a YX |
2140 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2141 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2142 | struct sk_buff *skb = NULL; |
57289015 | 2143 | u32 peer_port, peer_node; |
c5898636 | 2144 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2145 | |
6c9808ce | 2146 | bh_lock_sock(sk); |
d6fb7e9c | 2147 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2148 | bh_unlock_sock(sk); |
2149 | goto exit; | |
57289015 | 2150 | } |
301bae56 JPM |
2151 | peer_port = tsk_peer_port(tsk); |
2152 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2153 | |
8ea642ee | 2154 | if (tsk->probe_unacked) { |
b3be5e3e | 2155 | if (!sock_owned_by_user(sk)) { |
9fd4b070 | 2156 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
b3be5e3e EH |
2157 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2158 | tsk_peer_port(tsk)); | |
2159 | sk->sk_state_change(sk); | |
2160 | } else { | |
2161 | /* Try again later */ | |
2162 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2163 | } | |
2164 | ||
360aab6b PB |
2165 | bh_unlock_sock(sk); |
2166 | goto exit; | |
57289015 | 2167 | } |
360aab6b PB |
2168 | |
2169 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, | |
2170 | INT_H_SIZE, 0, peer_node, own_node, | |
2171 | peer_port, tsk->portid, TIPC_OK); | |
8ea642ee | 2172 | tsk->probe_unacked = true; |
360aab6b | 2173 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
57289015 | 2174 | bh_unlock_sock(sk); |
a6ca1094 | 2175 | if (skb) |
af9b028e | 2176 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2177 | exit: |
07f6c4bc | 2178 | sock_put(sk); |
57289015 JPM |
2179 | } |
2180 | ||
301bae56 | 2181 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2182 | struct tipc_name_seq const *seq) |
2183 | { | |
d6fb7e9c PB |
2184 | struct sock *sk = &tsk->sk; |
2185 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2186 | struct publication *publ; |
2187 | u32 key; | |
2188 | ||
d6fb7e9c | 2189 | if (tipc_sk_connected(sk)) |
0fc87aae | 2190 | return -EINVAL; |
07f6c4bc YX |
2191 | key = tsk->portid + tsk->pub_count + 1; |
2192 | if (key == tsk->portid) | |
0fc87aae JPM |
2193 | return -EADDRINUSE; |
2194 | ||
f2f9800d | 2195 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2196 | scope, tsk->portid, key); |
0fc87aae JPM |
2197 | if (unlikely(!publ)) |
2198 | return -EINVAL; | |
2199 | ||
301bae56 JPM |
2200 | list_add(&publ->pport_list, &tsk->publications); |
2201 | tsk->pub_count++; | |
2202 | tsk->published = 1; | |
0fc87aae JPM |
2203 | return 0; |
2204 | } | |
2205 | ||
301bae56 | 2206 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2207 | struct tipc_name_seq const *seq) |
2208 | { | |
f2f9800d | 2209 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2210 | struct publication *publ; |
2211 | struct publication *safe; | |
2212 | int rc = -EINVAL; | |
2213 | ||
301bae56 | 2214 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2215 | if (seq) { |
2216 | if (publ->scope != scope) | |
2217 | continue; | |
2218 | if (publ->type != seq->type) | |
2219 | continue; | |
2220 | if (publ->lower != seq->lower) | |
2221 | continue; | |
2222 | if (publ->upper != seq->upper) | |
2223 | break; | |
f2f9800d | 2224 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2225 | publ->ref, publ->key); |
2226 | rc = 0; | |
2227 | break; | |
2228 | } | |
f2f9800d | 2229 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2230 | publ->ref, publ->key); |
2231 | rc = 0; | |
2232 | } | |
301bae56 JPM |
2233 | if (list_empty(&tsk->publications)) |
2234 | tsk->published = 0; | |
0fc87aae JPM |
2235 | return rc; |
2236 | } | |
2237 | ||
5a9ee0be JPM |
2238 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2239 | * when we go from standalone to network mode. | |
2240 | */ | |
e05b31f4 | 2241 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2242 | { |
e05b31f4 | 2243 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2244 | struct rhashtable_iter iter; |
07f6c4bc | 2245 | struct tipc_sock *tsk; |
5a9ee0be | 2246 | struct tipc_msg *msg; |
5a9ee0be | 2247 | |
40f9f439 HX |
2248 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2249 | ||
2250 | do { | |
2251 | tsk = ERR_PTR(rhashtable_walk_start(&iter)); | |
2252 | if (tsk) | |
2253 | continue; | |
2254 | ||
2255 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
07f6c4bc YX |
2256 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
2257 | msg = &tsk->phdr; | |
34747539 YX |
2258 | msg_set_prevnode(msg, tn->own_addr); |
2259 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2260 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2261 | } | |
40f9f439 HX |
2262 | |
2263 | rhashtable_walk_stop(&iter); | |
2264 | } while (tsk == ERR_PTR(-EAGAIN)); | |
5a9ee0be JPM |
2265 | } |
2266 | ||
e05b31f4 | 2267 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2268 | { |
e05b31f4 | 2269 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2270 | struct tipc_sock *tsk; |
808d90f9 | 2271 | |
07f6c4bc | 2272 | rcu_read_lock(); |
6cca7289 | 2273 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2274 | if (tsk) |
2275 | sock_hold(&tsk->sk); | |
2276 | rcu_read_unlock(); | |
808d90f9 | 2277 | |
07f6c4bc | 2278 | return tsk; |
808d90f9 JPM |
2279 | } |
2280 | ||
07f6c4bc | 2281 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2282 | { |
e05b31f4 YX |
2283 | struct sock *sk = &tsk->sk; |
2284 | struct net *net = sock_net(sk); | |
2285 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2286 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2287 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2288 | |
07f6c4bc YX |
2289 | while (remaining--) { |
2290 | portid++; | |
2291 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2292 | portid = TIPC_MIN_PORT; | |
2293 | tsk->portid = portid; | |
2294 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2295 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2296 | tsk_rht_params)) | |
07f6c4bc YX |
2297 | return 0; |
2298 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2299 | } |
2300 | ||
07f6c4bc | 2301 | return -1; |
808d90f9 JPM |
2302 | } |
2303 | ||
07f6c4bc | 2304 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2305 | { |
07f6c4bc | 2306 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2307 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2308 | |
6cca7289 | 2309 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2310 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2311 | __sock_put(sk); | |
808d90f9 | 2312 | } |
808d90f9 JPM |
2313 | } |
2314 | ||
6cca7289 HX |
2315 | static const struct rhashtable_params tsk_rht_params = { |
2316 | .nelem_hint = 192, | |
2317 | .head_offset = offsetof(struct tipc_sock, node), | |
2318 | .key_offset = offsetof(struct tipc_sock, portid), | |
2319 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2320 | .max_size = 1048576, |
2321 | .min_size = 256, | |
b5e2c150 | 2322 | .automatic_shrinking = true, |
6cca7289 HX |
2323 | }; |
2324 | ||
e05b31f4 | 2325 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2326 | { |
e05b31f4 | 2327 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2328 | |
2329 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2330 | } |
2331 | ||
e05b31f4 | 2332 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2333 | { |
e05b31f4 YX |
2334 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2335 | ||
07f6c4bc YX |
2336 | /* Wait for socket readers to complete */ |
2337 | synchronize_net(); | |
808d90f9 | 2338 | |
e05b31f4 | 2339 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2340 | } |
2341 | ||
b97bf3fd | 2342 | /** |
247f0f3c | 2343 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2344 | * @sock: socket structure |
2345 | * @lvl: option level | |
2346 | * @opt: option identifier | |
2347 | * @ov: pointer to new option value | |
2348 | * @ol: length of option value | |
c4307285 YH |
2349 | * |
2350 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2351 | * (to ease compatibility). |
c4307285 | 2352 | * |
b97bf3fd PL |
2353 | * Returns 0 on success, errno otherwise |
2354 | */ | |
247f0f3c YX |
2355 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2356 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2357 | { |
0c3141e9 | 2358 | struct sock *sk = sock->sk; |
58ed9442 | 2359 | struct tipc_sock *tsk = tipc_sk(sk); |
01fd12bb | 2360 | u32 value = 0; |
a08ef476 | 2361 | int res = 0; |
b97bf3fd | 2362 | |
c4307285 YH |
2363 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2364 | return 0; | |
b97bf3fd PL |
2365 | if (lvl != SOL_TIPC) |
2366 | return -ENOPROTOOPT; | |
01fd12bb JPM |
2367 | |
2368 | switch (opt) { | |
2369 | case TIPC_IMPORTANCE: | |
2370 | case TIPC_SRC_DROPPABLE: | |
2371 | case TIPC_DEST_DROPPABLE: | |
2372 | case TIPC_CONN_TIMEOUT: | |
2373 | if (ol < sizeof(value)) | |
2374 | return -EINVAL; | |
2375 | res = get_user(value, (u32 __user *)ov); | |
2376 | if (res) | |
2377 | return res; | |
2378 | break; | |
2379 | default: | |
2380 | if (ov || ol) | |
2381 | return -EINVAL; | |
2382 | } | |
b97bf3fd | 2383 | |
0c3141e9 | 2384 | lock_sock(sk); |
c4307285 | 2385 | |
b97bf3fd PL |
2386 | switch (opt) { |
2387 | case TIPC_IMPORTANCE: | |
301bae56 | 2388 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2389 | break; |
2390 | case TIPC_SRC_DROPPABLE: | |
2391 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2392 | tsk_set_unreliable(tsk, value); |
c4307285 | 2393 | else |
b97bf3fd PL |
2394 | res = -ENOPROTOOPT; |
2395 | break; | |
2396 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2397 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2398 | break; |
2399 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2400 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 2401 | break; |
01fd12bb JPM |
2402 | case TIPC_MCAST_BROADCAST: |
2403 | tsk->mc_method.rcast = false; | |
2404 | tsk->mc_method.mandatory = true; | |
2405 | break; | |
2406 | case TIPC_MCAST_REPLICAST: | |
2407 | tsk->mc_method.rcast = true; | |
2408 | tsk->mc_method.mandatory = true; | |
2409 | break; | |
b97bf3fd PL |
2410 | default: |
2411 | res = -EINVAL; | |
2412 | } | |
2413 | ||
0c3141e9 AS |
2414 | release_sock(sk); |
2415 | ||
b97bf3fd PL |
2416 | return res; |
2417 | } | |
2418 | ||
2419 | /** | |
247f0f3c | 2420 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2421 | * @sock: socket structure |
2422 | * @lvl: option level | |
2423 | * @opt: option identifier | |
2424 | * @ov: receptacle for option value | |
2425 | * @ol: receptacle for length of option value | |
c4307285 YH |
2426 | * |
2427 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2428 | * (to ease compatibility). |
c4307285 | 2429 | * |
b97bf3fd PL |
2430 | * Returns 0 on success, errno otherwise |
2431 | */ | |
247f0f3c YX |
2432 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2433 | char __user *ov, int __user *ol) | |
b97bf3fd | 2434 | { |
0c3141e9 | 2435 | struct sock *sk = sock->sk; |
58ed9442 | 2436 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2437 | int len; |
b97bf3fd | 2438 | u32 value; |
c4307285 | 2439 | int res; |
b97bf3fd | 2440 | |
c4307285 YH |
2441 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2442 | return put_user(0, ol); | |
b97bf3fd PL |
2443 | if (lvl != SOL_TIPC) |
2444 | return -ENOPROTOOPT; | |
2db9983a AS |
2445 | res = get_user(len, ol); |
2446 | if (res) | |
c4307285 | 2447 | return res; |
b97bf3fd | 2448 | |
0c3141e9 | 2449 | lock_sock(sk); |
b97bf3fd PL |
2450 | |
2451 | switch (opt) { | |
2452 | case TIPC_IMPORTANCE: | |
301bae56 | 2453 | value = tsk_importance(tsk); |
b97bf3fd PL |
2454 | break; |
2455 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2456 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2457 | break; |
2458 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2459 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2460 | break; |
2461 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2462 | value = tsk->conn_timeout; |
0c3141e9 | 2463 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2464 | break; |
0e65967e | 2465 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2466 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2467 | break; |
0e65967e | 2468 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2469 | value = skb_queue_len(&sk->sk_receive_queue); |
2470 | break; | |
b97bf3fd PL |
2471 | default: |
2472 | res = -EINVAL; | |
2473 | } | |
2474 | ||
0c3141e9 AS |
2475 | release_sock(sk); |
2476 | ||
25860c3b PG |
2477 | if (res) |
2478 | return res; /* "get" failed */ | |
b97bf3fd | 2479 | |
25860c3b PG |
2480 | if (len < sizeof(value)) |
2481 | return -EINVAL; | |
2482 | ||
2483 | if (copy_to_user(ov, &value, sizeof(value))) | |
2484 | return -EFAULT; | |
2485 | ||
2486 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2487 | } |
2488 | ||
f2f9800d | 2489 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2490 | { |
f2f9800d | 2491 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2492 | struct tipc_sioc_ln_req lnr; |
2493 | void __user *argp = (void __user *)arg; | |
2494 | ||
2495 | switch (cmd) { | |
2496 | case SIOCGETLINKNAME: | |
2497 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2498 | return -EFAULT; | |
f2f9800d YX |
2499 | if (!tipc_node_get_linkname(sock_net(sk), |
2500 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2501 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2502 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2503 | return -EFAULT; | |
2504 | return 0; | |
2505 | } | |
2506 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2507 | default: |
2508 | return -ENOIOCTLCMD; | |
2509 | } | |
2510 | } | |
2511 | ||
ae86b9e3 BH |
2512 | /* Protocol switches for the various types of TIPC sockets */ |
2513 | ||
bca65eae | 2514 | static const struct proto_ops msg_ops = { |
0e65967e | 2515 | .owner = THIS_MODULE, |
b97bf3fd | 2516 | .family = AF_TIPC, |
247f0f3c YX |
2517 | .release = tipc_release, |
2518 | .bind = tipc_bind, | |
2519 | .connect = tipc_connect, | |
5eee6a6d | 2520 | .socketpair = sock_no_socketpair, |
245f3d34 | 2521 | .accept = sock_no_accept, |
247f0f3c YX |
2522 | .getname = tipc_getname, |
2523 | .poll = tipc_poll, | |
78acb1f9 | 2524 | .ioctl = tipc_ioctl, |
245f3d34 | 2525 | .listen = sock_no_listen, |
247f0f3c YX |
2526 | .shutdown = tipc_shutdown, |
2527 | .setsockopt = tipc_setsockopt, | |
2528 | .getsockopt = tipc_getsockopt, | |
2529 | .sendmsg = tipc_sendmsg, | |
2530 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2531 | .mmap = sock_no_mmap, |
2532 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2533 | }; |
2534 | ||
bca65eae | 2535 | static const struct proto_ops packet_ops = { |
0e65967e | 2536 | .owner = THIS_MODULE, |
b97bf3fd | 2537 | .family = AF_TIPC, |
247f0f3c YX |
2538 | .release = tipc_release, |
2539 | .bind = tipc_bind, | |
2540 | .connect = tipc_connect, | |
5eee6a6d | 2541 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2542 | .accept = tipc_accept, |
2543 | .getname = tipc_getname, | |
2544 | .poll = tipc_poll, | |
78acb1f9 | 2545 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2546 | .listen = tipc_listen, |
2547 | .shutdown = tipc_shutdown, | |
2548 | .setsockopt = tipc_setsockopt, | |
2549 | .getsockopt = tipc_getsockopt, | |
2550 | .sendmsg = tipc_send_packet, | |
2551 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2552 | .mmap = sock_no_mmap, |
2553 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2554 | }; |
2555 | ||
bca65eae | 2556 | static const struct proto_ops stream_ops = { |
0e65967e | 2557 | .owner = THIS_MODULE, |
b97bf3fd | 2558 | .family = AF_TIPC, |
247f0f3c YX |
2559 | .release = tipc_release, |
2560 | .bind = tipc_bind, | |
2561 | .connect = tipc_connect, | |
5eee6a6d | 2562 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2563 | .accept = tipc_accept, |
2564 | .getname = tipc_getname, | |
2565 | .poll = tipc_poll, | |
78acb1f9 | 2566 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2567 | .listen = tipc_listen, |
2568 | .shutdown = tipc_shutdown, | |
2569 | .setsockopt = tipc_setsockopt, | |
2570 | .getsockopt = tipc_getsockopt, | |
365ad353 | 2571 | .sendmsg = tipc_sendstream, |
247f0f3c | 2572 | .recvmsg = tipc_recv_stream, |
8238745a YH |
2573 | .mmap = sock_no_mmap, |
2574 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2575 | }; |
2576 | ||
bca65eae | 2577 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2578 | .owner = THIS_MODULE, |
b97bf3fd | 2579 | .family = AF_TIPC, |
c5fa7b3c | 2580 | .create = tipc_sk_create |
b97bf3fd PL |
2581 | }; |
2582 | ||
2583 | static struct proto tipc_proto = { | |
2584 | .name = "TIPC", | |
2585 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2586 | .obj_size = sizeof(struct tipc_sock), |
2587 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2588 | }; |
2589 | ||
2590 | /** | |
4323add6 | 2591 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2592 | * |
b97bf3fd PL |
2593 | * Returns 0 on success, errno otherwise |
2594 | */ | |
4323add6 | 2595 | int tipc_socket_init(void) |
b97bf3fd PL |
2596 | { |
2597 | int res; | |
2598 | ||
c4307285 | 2599 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2600 | if (res) { |
2cf8aa19 | 2601 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2602 | goto out; |
2603 | } | |
2604 | ||
2605 | res = sock_register(&tipc_family_ops); | |
2606 | if (res) { | |
2cf8aa19 | 2607 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2608 | proto_unregister(&tipc_proto); |
2609 | goto out; | |
2610 | } | |
b97bf3fd PL |
2611 | out: |
2612 | return res; | |
2613 | } | |
2614 | ||
2615 | /** | |
4323add6 | 2616 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2617 | */ |
4323add6 | 2618 | void tipc_socket_stop(void) |
b97bf3fd | 2619 | { |
b97bf3fd PL |
2620 | sock_unregister(tipc_family_ops.family); |
2621 | proto_unregister(&tipc_proto); | |
2622 | } | |
34b78a12 RA |
2623 | |
2624 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2625 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2626 | { |
2627 | u32 peer_node; | |
2628 | u32 peer_port; | |
2629 | struct nlattr *nest; | |
2630 | ||
2631 | peer_node = tsk_peer_node(tsk); | |
2632 | peer_port = tsk_peer_port(tsk); | |
2633 | ||
2634 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2635 | ||
2636 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2637 | goto msg_full; | |
2638 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2639 | goto msg_full; | |
2640 | ||
2641 | if (tsk->conn_type != 0) { | |
2642 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2643 | goto msg_full; | |
2644 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2645 | goto msg_full; | |
2646 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2647 | goto msg_full; | |
2648 | } | |
2649 | nla_nest_end(skb, nest); | |
2650 | ||
2651 | return 0; | |
2652 | ||
2653 | msg_full: | |
2654 | nla_nest_cancel(skb, nest); | |
2655 | ||
2656 | return -EMSGSIZE; | |
2657 | } | |
2658 | ||
2659 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2660 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2661 | struct tipc_sock *tsk) | |
34b78a12 RA |
2662 | { |
2663 | int err; | |
2664 | void *hdr; | |
2665 | struct nlattr *attrs; | |
34747539 YX |
2666 | struct net *net = sock_net(skb->sk); |
2667 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2668 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2669 | |
2670 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2671 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2672 | if (!hdr) |
2673 | goto msg_cancel; | |
2674 | ||
2675 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2676 | if (!attrs) | |
2677 | goto genlmsg_cancel; | |
07f6c4bc | 2678 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2679 | goto attr_msg_cancel; |
34747539 | 2680 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2681 | goto attr_msg_cancel; |
2682 | ||
d6fb7e9c | 2683 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2684 | err = __tipc_nl_add_sk_con(skb, tsk); |
2685 | if (err) | |
2686 | goto attr_msg_cancel; | |
2687 | } else if (!list_empty(&tsk->publications)) { | |
2688 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2689 | goto attr_msg_cancel; | |
2690 | } | |
2691 | nla_nest_end(skb, attrs); | |
2692 | genlmsg_end(skb, hdr); | |
2693 | ||
2694 | return 0; | |
2695 | ||
2696 | attr_msg_cancel: | |
2697 | nla_nest_cancel(skb, attrs); | |
2698 | genlmsg_cancel: | |
2699 | genlmsg_cancel(skb, hdr); | |
2700 | msg_cancel: | |
2701 | return -EMSGSIZE; | |
2702 | } | |
2703 | ||
2704 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2705 | { | |
2706 | int err; | |
2707 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2708 | const struct bucket_table *tbl; |
2709 | struct rhash_head *pos; | |
e05b31f4 YX |
2710 | struct net *net = sock_net(skb->sk); |
2711 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2712 | u32 tbl_id = cb->args[0]; |
2713 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2714 | |
07f6c4bc | 2715 | rcu_read_lock(); |
e05b31f4 | 2716 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2717 | for (; tbl_id < tbl->size; tbl_id++) { |
2718 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2719 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2720 | if (prev_portid && prev_portid != tsk->portid) { |
2721 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2722 | continue; | |
2723 | } | |
2724 | ||
07f6c4bc | 2725 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2726 | if (err) { |
2727 | prev_portid = tsk->portid; | |
2728 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2729 | goto out; | |
2730 | } | |
2731 | prev_portid = 0; | |
07f6c4bc | 2732 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2733 | } |
34b78a12 | 2734 | } |
d6e164e3 | 2735 | out: |
07f6c4bc | 2736 | rcu_read_unlock(); |
d6e164e3 RA |
2737 | cb->args[0] = tbl_id; |
2738 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2739 | |
2740 | return skb->len; | |
2741 | } | |
1a1a143d RA |
2742 | |
2743 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2744 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2745 | struct netlink_callback *cb, | |
2746 | struct publication *publ) | |
1a1a143d RA |
2747 | { |
2748 | void *hdr; | |
2749 | struct nlattr *attrs; | |
2750 | ||
2751 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2752 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2753 | if (!hdr) |
2754 | goto msg_cancel; | |
2755 | ||
2756 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2757 | if (!attrs) | |
2758 | goto genlmsg_cancel; | |
2759 | ||
2760 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2761 | goto attr_msg_cancel; | |
2762 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2763 | goto attr_msg_cancel; | |
2764 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2765 | goto attr_msg_cancel; | |
2766 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2767 | goto attr_msg_cancel; | |
2768 | ||
2769 | nla_nest_end(skb, attrs); | |
2770 | genlmsg_end(skb, hdr); | |
2771 | ||
2772 | return 0; | |
2773 | ||
2774 | attr_msg_cancel: | |
2775 | nla_nest_cancel(skb, attrs); | |
2776 | genlmsg_cancel: | |
2777 | genlmsg_cancel(skb, hdr); | |
2778 | msg_cancel: | |
2779 | return -EMSGSIZE; | |
2780 | } | |
2781 | ||
2782 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2783 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2784 | struct netlink_callback *cb, | |
2785 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2786 | { |
2787 | int err; | |
2788 | struct publication *p; | |
2789 | ||
2790 | if (*last_publ) { | |
2791 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2792 | if (p->key == *last_publ) | |
2793 | break; | |
2794 | } | |
2795 | if (p->key != *last_publ) { | |
2796 | /* We never set seq or call nl_dump_check_consistent() | |
2797 | * this means that setting prev_seq here will cause the | |
2798 | * consistence check to fail in the netlink callback | |
2799 | * handler. Resulting in the last NLMSG_DONE message | |
2800 | * having the NLM_F_DUMP_INTR flag set. | |
2801 | */ | |
2802 | cb->prev_seq = 1; | |
2803 | *last_publ = 0; | |
2804 | return -EPIPE; | |
2805 | } | |
2806 | } else { | |
2807 | p = list_first_entry(&tsk->publications, struct publication, | |
2808 | pport_list); | |
2809 | } | |
2810 | ||
2811 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2812 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2813 | if (err) { | |
2814 | *last_publ = p->key; | |
2815 | return err; | |
2816 | } | |
2817 | } | |
2818 | *last_publ = 0; | |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2824 | { | |
2825 | int err; | |
07f6c4bc | 2826 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2827 | u32 last_publ = cb->args[1]; |
2828 | u32 done = cb->args[2]; | |
e05b31f4 | 2829 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2830 | struct tipc_sock *tsk; |
2831 | ||
07f6c4bc | 2832 | if (!tsk_portid) { |
1a1a143d RA |
2833 | struct nlattr **attrs; |
2834 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2835 | ||
2836 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2837 | if (err) | |
2838 | return err; | |
2839 | ||
45e093ae RA |
2840 | if (!attrs[TIPC_NLA_SOCK]) |
2841 | return -EINVAL; | |
2842 | ||
1a1a143d RA |
2843 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2844 | attrs[TIPC_NLA_SOCK], | |
2845 | tipc_nl_sock_policy); | |
2846 | if (err) | |
2847 | return err; | |
2848 | ||
2849 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2850 | return -EINVAL; | |
2851 | ||
07f6c4bc | 2852 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2853 | } |
2854 | ||
2855 | if (done) | |
2856 | return 0; | |
2857 | ||
e05b31f4 | 2858 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2859 | if (!tsk) |
2860 | return -EINVAL; | |
2861 | ||
2862 | lock_sock(&tsk->sk); | |
2863 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2864 | if (!err) | |
2865 | done = 1; | |
2866 | release_sock(&tsk->sk); | |
07f6c4bc | 2867 | sock_put(&tsk->sk); |
1a1a143d | 2868 | |
07f6c4bc | 2869 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2870 | cb->args[1] = last_publ; |
2871 | cb->args[2] = done; | |
2872 | ||
2873 | return skb->len; | |
2874 | } |