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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
75da2163 | 4 | * Copyright (c) 2001-2007, 2012-2017, 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" |
75da2163 | 48 | #include "group.h" |
2cf8aa19 | 49 | |
07f6c4bc | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
0d5fcebf | 51 | #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 52 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
53 | #define TIPC_MAX_PORT 0xffffffff |
54 | #define TIPC_MIN_PORT 1 | |
e9f8b101 | 55 | #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */ |
301bae56 | 56 | |
0c288c86 PB |
57 | enum { |
58 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 59 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 60 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 61 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 62 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
63 | }; |
64 | ||
31c82a2d JM |
65 | struct sockaddr_pair { |
66 | struct sockaddr_tipc sock; | |
67 | struct sockaddr_tipc member; | |
68 | }; | |
69 | ||
301bae56 JPM |
70 | /** |
71 | * struct tipc_sock - TIPC socket structure | |
72 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
73 | * @conn_type: TIPC type used when connection was established |
74 | * @conn_instance: TIPC instance used when connection was established | |
75 | * @published: non-zero if port has one or more associated names | |
76 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 77 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 78 | * @phdr: preformatted message header used when sending messages |
365ad353 | 79 | * #cong_links: list of congested links |
301bae56 | 80 | * @publications: list of publications for port |
365ad353 | 81 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 JPM |
82 | * @pub_count: total # of publications port has made during its lifetime |
83 | * @probing_state: | |
301bae56 JPM |
84 | * @conn_timeout: the time we can wait for an unresponded setup request |
85 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 86 | * @cong_link_cnt: number of congested links |
75da2163 | 87 | * @snt_unacked: # messages sent by socket, and not yet acked by peer |
301bae56 | 88 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
aeda16b6 | 89 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 90 | * @node: hash table node |
01fd12bb | 91 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 92 | * @rcu: rcu struct for tipc_sock |
301bae56 JPM |
93 | */ |
94 | struct tipc_sock { | |
95 | struct sock sk; | |
301bae56 JPM |
96 | u32 conn_type; |
97 | u32 conn_instance; | |
98 | int published; | |
99 | u32 max_pkt; | |
07f6c4bc | 100 | u32 portid; |
301bae56 | 101 | struct tipc_msg phdr; |
365ad353 | 102 | struct list_head cong_links; |
301bae56 JPM |
103 | struct list_head publications; |
104 | u32 pub_count; | |
301bae56 JPM |
105 | uint conn_timeout; |
106 | atomic_t dupl_rcvcnt; | |
8ea642ee | 107 | bool probe_unacked; |
365ad353 | 108 | u16 cong_link_cnt; |
10724cc7 JPM |
109 | u16 snt_unacked; |
110 | u16 snd_win; | |
60020e18 | 111 | u16 peer_caps; |
10724cc7 JPM |
112 | u16 rcv_unacked; |
113 | u16 rcv_win; | |
aeda16b6 | 114 | struct sockaddr_tipc peer; |
07f6c4bc | 115 | struct rhash_head node; |
01fd12bb | 116 | struct tipc_mc_method mc_method; |
07f6c4bc | 117 | struct rcu_head rcu; |
75da2163 | 118 | struct tipc_group *group; |
301bae56 | 119 | }; |
b97bf3fd | 120 | |
64ac5f59 | 121 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 122 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 123 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 124 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c | 125 | static int tipc_release(struct socket *sock); |
cdfbabfb DH |
126 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
127 | bool kern); | |
31b102bb | 128 | static void tipc_sk_timeout(struct timer_list *t); |
301bae56 | 129 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 130 | struct tipc_name_seq const *seq); |
301bae56 | 131 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 132 | struct tipc_name_seq const *seq); |
75da2163 | 133 | static int tipc_sk_leave(struct tipc_sock *tsk); |
e05b31f4 | 134 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
135 | static int tipc_sk_insert(struct tipc_sock *tsk); |
136 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 137 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 138 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
b97bf3fd | 139 | |
bca65eae FW |
140 | static const struct proto_ops packet_ops; |
141 | static const struct proto_ops stream_ops; | |
142 | static const struct proto_ops msg_ops; | |
b97bf3fd | 143 | static struct proto tipc_proto; |
6cca7289 HX |
144 | static const struct rhashtable_params tsk_rht_params; |
145 | ||
c5898636 JPM |
146 | static u32 tsk_own_node(struct tipc_sock *tsk) |
147 | { | |
148 | return msg_prevnode(&tsk->phdr); | |
149 | } | |
150 | ||
301bae56 | 151 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 152 | { |
301bae56 | 153 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
154 | } |
155 | ||
301bae56 | 156 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 157 | { |
301bae56 | 158 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
159 | } |
160 | ||
301bae56 | 161 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 162 | { |
301bae56 | 163 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
164 | } |
165 | ||
301bae56 | 166 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 167 | { |
301bae56 | 168 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
169 | } |
170 | ||
301bae56 | 171 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 172 | { |
301bae56 | 173 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
174 | } |
175 | ||
301bae56 | 176 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 177 | { |
301bae56 | 178 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
179 | } |
180 | ||
301bae56 | 181 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 182 | { |
301bae56 | 183 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
184 | } |
185 | ||
301bae56 | 186 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
187 | { |
188 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
189 | return -EINVAL; | |
301bae56 | 190 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
191 | return 0; |
192 | } | |
8826cde6 | 193 | |
301bae56 JPM |
194 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
195 | { | |
196 | return container_of(sk, struct tipc_sock, sk); | |
197 | } | |
198 | ||
10724cc7 | 199 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 200 | { |
6998cc6e | 201 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
202 | } |
203 | ||
b7d42635 JM |
204 | static u16 tsk_blocks(int len) |
205 | { | |
206 | return ((len / FLOWCTL_BLK_SZ) + 1); | |
207 | } | |
208 | ||
10724cc7 JPM |
209 | /* tsk_blocks(): translate a buffer size in bytes to number of |
210 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
211 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
212 | */ | |
213 | static u16 tsk_adv_blocks(int len) | |
214 | { | |
215 | return len / FLOWCTL_BLK_SZ / 4; | |
216 | } | |
217 | ||
218 | /* tsk_inc(): increment counter for sent or received data | |
219 | * - If block based flow control is not supported by peer we | |
220 | * fall back to message based ditto, incrementing the counter | |
221 | */ | |
222 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
223 | { | |
224 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
225 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
226 | return 1; | |
301bae56 JPM |
227 | } |
228 | ||
0c3141e9 | 229 | /** |
2e84c60b | 230 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
231 | * |
232 | * Caller must hold socket lock | |
b97bf3fd | 233 | */ |
2e84c60b | 234 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 235 | { |
5f6d9123 | 236 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
237 | } |
238 | ||
bcd3ffd4 JPM |
239 | /* tipc_sk_respond() : send response message back to sender |
240 | */ | |
241 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
242 | { | |
243 | u32 selector; | |
244 | u32 dnode; | |
245 | u32 onode = tipc_own_addr(sock_net(sk)); | |
246 | ||
247 | if (!tipc_msg_reverse(onode, &skb, err)) | |
248 | return; | |
249 | ||
250 | dnode = msg_destnode(buf_msg(skb)); | |
251 | selector = msg_origport(buf_msg(skb)); | |
252 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
253 | } | |
254 | ||
b97bf3fd | 255 | /** |
2e84c60b | 256 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
257 | * |
258 | * Caller must hold socket lock | |
b97bf3fd | 259 | */ |
2e84c60b | 260 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 261 | { |
a6ca1094 | 262 | struct sk_buff *skb; |
0c3141e9 | 263 | |
bcd3ffd4 JPM |
264 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
265 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
266 | } |
267 | ||
d6fb7e9c PB |
268 | static bool tipc_sk_connected(struct sock *sk) |
269 | { | |
f40acbaf | 270 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
271 | } |
272 | ||
c752023a PB |
273 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
274 | * @sk: socket | |
275 | * | |
276 | * Returns true if connection less, false otherwise | |
277 | */ | |
278 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
279 | { | |
280 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
281 | } | |
282 | ||
2e84c60b | 283 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
284 | * |
285 | * Handles cases where the node's network address has changed from | |
286 | * the default of <0.0.0> to its configured setting. | |
287 | */ | |
2e84c60b | 288 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 289 | { |
d6fb7e9c PB |
290 | struct sock *sk = &tsk->sk; |
291 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 292 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
293 | u32 orig_node; |
294 | u32 peer_node; | |
295 | ||
d6fb7e9c | 296 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
297 | return false; |
298 | ||
299 | if (unlikely(msg_origport(msg) != peer_port)) | |
300 | return false; | |
301 | ||
302 | orig_node = msg_orignode(msg); | |
301bae56 | 303 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
304 | |
305 | if (likely(orig_node == peer_node)) | |
306 | return true; | |
307 | ||
34747539 | 308 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
309 | return true; |
310 | ||
34747539 | 311 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
312 | return true; |
313 | ||
314 | return false; | |
315 | } | |
316 | ||
0c288c86 PB |
317 | /* tipc_set_sk_state - set the sk_state of the socket |
318 | * @sk: socket | |
319 | * | |
320 | * Caller must hold socket lock | |
321 | * | |
322 | * Returns 0 on success, errno otherwise | |
323 | */ | |
324 | static int tipc_set_sk_state(struct sock *sk, int state) | |
325 | { | |
438adcaf | 326 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
327 | int res = -EINVAL; |
328 | ||
329 | switch (state) { | |
438adcaf PB |
330 | case TIPC_OPEN: |
331 | res = 0; | |
332 | break; | |
0c288c86 | 333 | case TIPC_LISTEN: |
99a20889 | 334 | case TIPC_CONNECTING: |
438adcaf | 335 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
336 | res = 0; |
337 | break; | |
8ea642ee | 338 | case TIPC_ESTABLISHED: |
99a20889 | 339 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 340 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
341 | res = 0; |
342 | break; | |
9fd4b070 | 343 | case TIPC_DISCONNECTING: |
99a20889 | 344 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
345 | oldsk_state == TIPC_ESTABLISHED) |
346 | res = 0; | |
347 | break; | |
0c288c86 PB |
348 | } |
349 | ||
350 | if (!res) | |
351 | sk->sk_state = state; | |
352 | ||
353 | return res; | |
354 | } | |
355 | ||
8c44e1af JPM |
356 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
357 | { | |
358 | struct sock *sk = sock->sk; | |
359 | int err = sock_error(sk); | |
360 | int typ = sock->type; | |
361 | ||
362 | if (err) | |
363 | return err; | |
364 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
365 | if (sk->sk_state == TIPC_DISCONNECTING) | |
366 | return -EPIPE; | |
367 | else if (!tipc_sk_connected(sk)) | |
368 | return -ENOTCONN; | |
369 | } | |
370 | if (!*timeout) | |
371 | return -EAGAIN; | |
372 | if (signal_pending(current)) | |
373 | return sock_intr_errno(*timeout); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
844cf763 JPM |
378 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
379 | ({ \ | |
d500ac29 | 380 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ |
844cf763 JPM |
381 | struct sock *sk_; \ |
382 | int rc_; \ | |
383 | \ | |
384 | while ((rc_ = !(condition_))) { \ | |
d500ac29 TN |
385 | /* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \ |
386 | smp_rmb(); \ | |
844cf763 JPM |
387 | sk_ = (sock_)->sk; \ |
388 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
389 | if (rc_) \ | |
390 | break; \ | |
391 | prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \ | |
392 | release_sock(sk_); \ | |
393 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
394 | sched_annotate_sleep(); \ | |
395 | lock_sock(sk_); \ | |
396 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
397 | } \ | |
398 | rc_; \ | |
8c44e1af JPM |
399 | }) |
400 | ||
b97bf3fd | 401 | /** |
c5fa7b3c | 402 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 403 | * @net: network namespace (must be default network) |
b97bf3fd PL |
404 | * @sock: pre-allocated socket structure |
405 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 406 | * @kern: caused by kernel or by userspace? |
c4307285 | 407 | * |
0c3141e9 AS |
408 | * This routine creates additional data structures used by the TIPC socket, |
409 | * initializes them, and links them together. | |
b97bf3fd PL |
410 | * |
411 | * Returns 0 on success, errno otherwise | |
412 | */ | |
58ed9442 JPM |
413 | static int tipc_sk_create(struct net *net, struct socket *sock, |
414 | int protocol, int kern) | |
b97bf3fd | 415 | { |
c5898636 | 416 | struct tipc_net *tn; |
0c3141e9 | 417 | const struct proto_ops *ops; |
b97bf3fd | 418 | struct sock *sk; |
58ed9442 | 419 | struct tipc_sock *tsk; |
5b8fa7ce | 420 | struct tipc_msg *msg; |
0c3141e9 AS |
421 | |
422 | /* Validate arguments */ | |
b97bf3fd PL |
423 | if (unlikely(protocol != 0)) |
424 | return -EPROTONOSUPPORT; | |
425 | ||
b97bf3fd PL |
426 | switch (sock->type) { |
427 | case SOCK_STREAM: | |
0c3141e9 | 428 | ops = &stream_ops; |
b97bf3fd PL |
429 | break; |
430 | case SOCK_SEQPACKET: | |
0c3141e9 | 431 | ops = &packet_ops; |
b97bf3fd PL |
432 | break; |
433 | case SOCK_DGRAM: | |
b97bf3fd | 434 | case SOCK_RDM: |
0c3141e9 | 435 | ops = &msg_ops; |
b97bf3fd | 436 | break; |
49978651 | 437 | default: |
49978651 | 438 | return -EPROTOTYPE; |
b97bf3fd PL |
439 | } |
440 | ||
0c3141e9 | 441 | /* Allocate socket's protocol area */ |
11aa9c28 | 442 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 443 | if (sk == NULL) |
b97bf3fd | 444 | return -ENOMEM; |
b97bf3fd | 445 | |
58ed9442 | 446 | tsk = tipc_sk(sk); |
301bae56 | 447 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 448 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 449 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 450 | msg = &tsk->phdr; |
c5898636 | 451 | tn = net_generic(sock_net(sk), tipc_net_id); |
b97bf3fd | 452 | |
0c3141e9 | 453 | /* Finish initializing socket data structures */ |
0c3141e9 | 454 | sock->ops = ops; |
0c3141e9 | 455 | sock_init_data(sock, sk); |
438adcaf | 456 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 457 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 458 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
459 | return -EINVAL; |
460 | } | |
40f9f439 HX |
461 | |
462 | /* Ensure tsk is visible before we read own_addr. */ | |
463 | smp_mb(); | |
464 | ||
465 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
466 | NAMED_H_SIZE, 0); | |
467 | ||
07f6c4bc | 468 | msg_set_origport(msg, tsk->portid); |
31b102bb | 469 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 470 | sk->sk_shutdown = 0; |
64ac5f59 | 471 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
cc79dd1b | 472 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
473 | sk->sk_data_ready = tipc_data_ready; |
474 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 475 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
476 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
477 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 478 | |
10724cc7 JPM |
479 | /* Start out with safe limits until we receive an advertised window */ |
480 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
481 | tsk->rcv_win = tsk->snd_win; | |
482 | ||
c752023a | 483 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 484 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 485 | if (sock->type == SOCK_DGRAM) |
301bae56 | 486 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 487 | } |
438adcaf | 488 | |
b97bf3fd PL |
489 | return 0; |
490 | } | |
491 | ||
07f6c4bc YX |
492 | static void tipc_sk_callback(struct rcu_head *head) |
493 | { | |
494 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
495 | ||
496 | sock_put(&tsk->sk); | |
497 | } | |
498 | ||
6f00089c PB |
499 | /* Caller should hold socket lock for the socket. */ |
500 | static void __tipc_shutdown(struct socket *sock, int error) | |
501 | { | |
502 | struct sock *sk = sock->sk; | |
503 | struct tipc_sock *tsk = tipc_sk(sk); | |
504 | struct net *net = sock_net(sk); | |
365ad353 | 505 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
506 | u32 dnode = tsk_peer_node(tsk); |
507 | struct sk_buff *skb; | |
508 | ||
365ad353 JPM |
509 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
510 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
511 | !tsk_conn_cong(tsk))); | |
512 | ||
6f00089c PB |
513 | /* Reject all unreceived messages, except on an active connection |
514 | * (which disconnects locally & sends a 'FIN+' to peer). | |
515 | */ | |
516 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
517 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
518 | kfree_skb(skb); | |
693c5649 | 519 | continue; |
6f00089c | 520 | } |
693c5649 JPM |
521 | if (!tipc_sk_type_connectionless(sk) && |
522 | sk->sk_state != TIPC_DISCONNECTING) { | |
523 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
524 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
525 | } | |
526 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 527 | } |
693c5649 JPM |
528 | |
529 | if (tipc_sk_type_connectionless(sk)) | |
530 | return; | |
531 | ||
6f00089c PB |
532 | if (sk->sk_state != TIPC_DISCONNECTING) { |
533 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
534 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
535 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
536 | tsk->portid, error); | |
537 | if (skb) | |
538 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
539 | tipc_node_remove_conn(net, dnode, tsk->portid); |
540 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
541 | } |
542 | } | |
543 | ||
b97bf3fd | 544 | /** |
247f0f3c | 545 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
546 | * @sock: socket to destroy |
547 | * | |
548 | * This routine cleans up any messages that are still queued on the socket. | |
549 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
550 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
551 | * and any others are discarded. (If the first message on a STREAM socket | |
552 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 553 | * |
b97bf3fd PL |
554 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
555 | * are returned or discarded according to the "destination droppable" setting | |
556 | * specified for the message by the sender. | |
557 | * | |
558 | * Returns 0 on success, errno otherwise | |
559 | */ | |
247f0f3c | 560 | static int tipc_release(struct socket *sock) |
b97bf3fd | 561 | { |
b97bf3fd | 562 | struct sock *sk = sock->sk; |
58ed9442 | 563 | struct tipc_sock *tsk; |
b97bf3fd | 564 | |
0c3141e9 AS |
565 | /* |
566 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
567 | * releases a pre-allocated child socket that was never used) | |
568 | */ | |
0c3141e9 | 569 | if (sk == NULL) |
b97bf3fd | 570 | return 0; |
c4307285 | 571 | |
58ed9442 | 572 | tsk = tipc_sk(sk); |
0c3141e9 AS |
573 | lock_sock(sk); |
574 | ||
6f00089c PB |
575 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
576 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 577 | tipc_sk_leave(tsk); |
301bae56 | 578 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 579 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 580 | tipc_sk_remove(tsk); |
b97bf3fd | 581 | |
9e6dfb4e | 582 | sock_orphan(sk); |
0c3141e9 | 583 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 584 | release_sock(sk); |
a80ae530 | 585 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 586 | tsk->cong_link_cnt = 0; |
07f6c4bc | 587 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 588 | sock->sk = NULL; |
b97bf3fd | 589 | |
065d7e39 | 590 | return 0; |
b97bf3fd PL |
591 | } |
592 | ||
593 | /** | |
247f0f3c | 594 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
595 | * @sock: socket structure |
596 | * @uaddr: socket address describing name(s) and desired operation | |
597 | * @uaddr_len: size of socket address data structure | |
c4307285 | 598 | * |
b97bf3fd PL |
599 | * Name and name sequence binding is indicated using a positive scope value; |
600 | * a negative scope value unbinds the specified name. Specifying no name | |
601 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 602 | * |
b97bf3fd | 603 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
604 | * |
605 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
606 | * access any non-constant socket information. | |
b97bf3fd | 607 | */ |
247f0f3c YX |
608 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
609 | int uaddr_len) | |
b97bf3fd | 610 | { |
84602761 | 611 | struct sock *sk = sock->sk; |
b97bf3fd | 612 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 613 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 614 | int res = -EINVAL; |
b97bf3fd | 615 | |
84602761 YX |
616 | lock_sock(sk); |
617 | if (unlikely(!uaddr_len)) { | |
301bae56 | 618 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
619 | goto exit; |
620 | } | |
75da2163 JM |
621 | if (tsk->group) { |
622 | res = -EACCES; | |
623 | goto exit; | |
624 | } | |
84602761 YX |
625 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
626 | res = -EINVAL; | |
627 | goto exit; | |
628 | } | |
629 | if (addr->family != AF_TIPC) { | |
630 | res = -EAFNOSUPPORT; | |
631 | goto exit; | |
632 | } | |
b97bf3fd | 633 | |
b97bf3fd PL |
634 | if (addr->addrtype == TIPC_ADDR_NAME) |
635 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
636 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
637 | res = -EAFNOSUPPORT; | |
638 | goto exit; | |
639 | } | |
c4307285 | 640 | |
13a2e898 | 641 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 642 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
643 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
644 | res = -EACCES; | |
645 | goto exit; | |
646 | } | |
c422f1bd | 647 | |
84602761 | 648 | res = (addr->scope > 0) ? |
301bae56 JPM |
649 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
650 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
651 | exit: |
652 | release_sock(sk); | |
653 | return res; | |
b97bf3fd PL |
654 | } |
655 | ||
c4307285 | 656 | /** |
247f0f3c | 657 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
658 | * @sock: socket structure |
659 | * @uaddr: area for returned socket address | |
660 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 661 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 662 | * |
b97bf3fd | 663 | * Returns 0 on success, errno otherwise |
0c3141e9 | 664 | * |
2da59918 AS |
665 | * NOTE: This routine doesn't need to take the socket lock since it only |
666 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 667 | * a completely predictable manner). |
b97bf3fd | 668 | */ |
247f0f3c YX |
669 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
670 | int *uaddr_len, int peer) | |
b97bf3fd | 671 | { |
b97bf3fd | 672 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
673 | struct sock *sk = sock->sk; |
674 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 675 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 676 | |
88f8a5e3 | 677 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 678 | if (peer) { |
f40acbaf | 679 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 680 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 681 | return -ENOTCONN; |
301bae56 JPM |
682 | addr->addr.id.ref = tsk_peer_port(tsk); |
683 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 684 | } else { |
07f6c4bc | 685 | addr->addr.id.ref = tsk->portid; |
34747539 | 686 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 687 | } |
b97bf3fd PL |
688 | |
689 | *uaddr_len = sizeof(*addr); | |
690 | addr->addrtype = TIPC_ADDR_ID; | |
691 | addr->family = AF_TIPC; | |
692 | addr->scope = 0; | |
b97bf3fd PL |
693 | addr->addr.name.domain = 0; |
694 | ||
0c3141e9 | 695 | return 0; |
b97bf3fd PL |
696 | } |
697 | ||
698 | /** | |
247f0f3c | 699 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
700 | * @file: file structure associated with the socket |
701 | * @sock: socket for which to calculate the poll bits | |
702 | * @wait: ??? | |
703 | * | |
9b674e82 AS |
704 | * Returns pollmask value |
705 | * | |
706 | * COMMENTARY: | |
707 | * It appears that the usual socket locking mechanisms are not useful here | |
708 | * since the pollmask info is potentially out-of-date the moment this routine | |
709 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
710 | * to handle any preventable race conditions, so TIPC will do the same ... | |
711 | * | |
f662c070 AS |
712 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
713 | * imply that the operation will succeed, merely that it should be performed | |
714 | * and will not block. | |
b97bf3fd | 715 | */ |
247f0f3c YX |
716 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
717 | poll_table *wait) | |
b97bf3fd | 718 | { |
9b674e82 | 719 | struct sock *sk = sock->sk; |
58ed9442 | 720 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 721 | struct tipc_group *grp = tsk->group; |
ae236fb2 | 722 | u32 revents = 0; |
9b674e82 | 723 | |
f288bef4 | 724 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 725 | |
6f00089c | 726 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
ae236fb2 | 727 | revents |= POLLRDHUP | POLLIN | POLLRDNORM; |
6f00089c | 728 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
ae236fb2 | 729 | revents |= POLLHUP; |
6f00089c | 730 | |
f40acbaf PB |
731 | switch (sk->sk_state) { |
732 | case TIPC_ESTABLISHED: | |
517d7c79 | 733 | case TIPC_CONNECTING: |
365ad353 | 734 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
ae236fb2 | 735 | revents |= POLLOUT; |
f40acbaf PB |
736 | /* fall thru' */ |
737 | case TIPC_LISTEN: | |
cb4dc41e | 738 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 | 739 | revents |= POLLIN | POLLRDNORM; |
f40acbaf PB |
740 | break; |
741 | case TIPC_OPEN: | |
75da2163 JM |
742 | if (!grp || tipc_group_size(grp)) |
743 | if (!tsk->cong_link_cnt) | |
ae236fb2 JM |
744 | revents |= POLLOUT; |
745 | if (!tipc_sk_type_connectionless(sk)) | |
746 | break; | |
cb4dc41e | 747 | if (skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 JM |
748 | break; |
749 | revents |= POLLIN | POLLRDNORM; | |
f40acbaf PB |
750 | break; |
751 | case TIPC_DISCONNECTING: | |
ae236fb2 | 752 | revents = POLLIN | POLLRDNORM | POLLHUP; |
f40acbaf | 753 | break; |
f662c070 | 754 | } |
ae236fb2 | 755 | return revents; |
b97bf3fd PL |
756 | } |
757 | ||
0abd8ff2 JPM |
758 | /** |
759 | * tipc_sendmcast - send multicast message | |
760 | * @sock: socket structure | |
761 | * @seq: destination address | |
562640f3 | 762 | * @msg: message to send |
365ad353 JPM |
763 | * @dlen: length of data to send |
764 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
765 | * |
766 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
767 | * Returns the number of bytes sent on success, or errno | |
768 | */ | |
769 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 770 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
771 | { |
772 | struct sock *sk = sock->sk; | |
c5898636 | 773 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 774 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 775 | struct net *net = sock_net(sk); |
365ad353 | 776 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 777 | struct tipc_mc_method *method = &tsk->mc_method; |
a853e4c6 | 778 | u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); |
365ad353 | 779 | struct sk_buff_head pkts; |
a853e4c6 | 780 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
781 | int rc; |
782 | ||
75da2163 JM |
783 | if (tsk->group) |
784 | return -EACCES; | |
785 | ||
a853e4c6 | 786 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
787 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
788 | if (unlikely(rc)) | |
789 | return rc; | |
f214fc40 | 790 | |
a853e4c6 JPM |
791 | /* Lookup destination nodes */ |
792 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
793 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
794 | seq->upper, domain, &dsts); | |
795 | if (!dsts.local && !dsts.remote) | |
796 | return -EHOSTUNREACH; | |
797 | ||
798 | /* Build message header */ | |
365ad353 | 799 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 800 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
801 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
802 | msg_set_destport(hdr, 0); | |
803 | msg_set_destnode(hdr, 0); | |
804 | msg_set_nametype(hdr, seq->type); | |
805 | msg_set_namelower(hdr, seq->lower); | |
806 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 807 | |
a853e4c6 | 808 | /* Build message as chain of buffers */ |
365ad353 JPM |
809 | skb_queue_head_init(&pkts); |
810 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
0abd8ff2 | 811 | |
a853e4c6 JPM |
812 | /* Send message if build was successful */ |
813 | if (unlikely(rc == dlen)) | |
01fd12bb | 814 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 JPM |
815 | &tsk->cong_link_cnt); |
816 | ||
817 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
818 | |
819 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
820 | } |
821 | ||
27bd9ec0 JM |
822 | /** |
823 | * tipc_send_group_msg - send a message to a member in the group | |
824 | * @net: network namespace | |
825 | * @m: message to send | |
826 | * @mb: group member | |
827 | * @dnode: destination node | |
828 | * @dport: destination port | |
829 | * @dlen: total length of message data | |
830 | */ | |
831 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
832 | struct msghdr *m, struct tipc_member *mb, | |
833 | u32 dnode, u32 dport, int dlen) | |
834 | { | |
b87a5ea3 | 835 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 836 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
837 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
838 | struct tipc_msg *hdr = &tsk->phdr; | |
839 | struct sk_buff_head pkts; | |
840 | int mtu, rc; | |
841 | ||
842 | /* Complete message header */ | |
843 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
844 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
845 | msg_set_destport(hdr, dport); | |
846 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 847 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
848 | |
849 | /* Build message as chain of buffers */ | |
850 | skb_queue_head_init(&pkts); | |
851 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); | |
852 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
853 | if (unlikely(rc != dlen)) | |
854 | return rc; | |
855 | ||
856 | /* Send message */ | |
857 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
858 | if (unlikely(rc == -ELINKCONG)) { | |
859 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
860 | tsk->cong_link_cnt++; | |
861 | } | |
862 | ||
2f487712 | 863 | /* Update send window */ |
27bd9ec0 JM |
864 | tipc_group_update_member(mb, blks); |
865 | ||
2f487712 JM |
866 | /* A broadcast sent within next EXPIRE period must follow same path */ |
867 | method->rcast = true; | |
868 | method->mandatory = true; | |
27bd9ec0 JM |
869 | return dlen; |
870 | } | |
871 | ||
872 | /** | |
873 | * tipc_send_group_unicast - send message to a member in the group | |
874 | * @sock: socket structure | |
875 | * @m: message to send | |
876 | * @dlen: total length of message data | |
877 | * @timeout: timeout to wait for wakeup | |
878 | * | |
879 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
880 | * Returns the number of bytes sent on success, or errno | |
881 | */ | |
882 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
883 | int dlen, long timeout) | |
884 | { | |
885 | struct sock *sk = sock->sk; | |
886 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
887 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
888 | struct tipc_sock *tsk = tipc_sk(sk); | |
27bd9ec0 JM |
889 | struct net *net = sock_net(sk); |
890 | struct tipc_member *mb = NULL; | |
891 | u32 node, port; | |
892 | int rc; | |
893 | ||
894 | node = dest->addr.id.node; | |
895 | port = dest->addr.id.ref; | |
896 | if (!port && !node) | |
897 | return -EHOSTUNREACH; | |
898 | ||
899 | /* Block or return if destination link or member is congested */ | |
900 | rc = tipc_wait_for_cond(sock, &timeout, | |
901 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
05231d67 CW |
902 | tsk->group && |
903 | !tipc_group_cong(tsk->group, node, port, blks, | |
904 | &mb)); | |
27bd9ec0 JM |
905 | if (unlikely(rc)) |
906 | return rc; | |
907 | ||
908 | if (unlikely(!mb)) | |
909 | return -EHOSTUNREACH; | |
910 | ||
911 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
912 | ||
913 | return rc ? rc : dlen; | |
914 | } | |
915 | ||
ee106d7f JM |
916 | /** |
917 | * tipc_send_group_anycast - send message to any member with given identity | |
918 | * @sock: socket structure | |
919 | * @m: message to send | |
920 | * @dlen: total length of message data | |
921 | * @timeout: timeout to wait for wakeup | |
922 | * | |
923 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
924 | * Returns the number of bytes sent on success, or errno | |
925 | */ | |
926 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
927 | int dlen, long timeout) | |
928 | { | |
929 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
930 | struct sock *sk = sock->sk; | |
931 | struct tipc_sock *tsk = tipc_sk(sk); | |
932 | struct list_head *cong_links = &tsk->cong_links; | |
933 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
ee106d7f JM |
934 | struct tipc_member *first = NULL; |
935 | struct tipc_member *mbr = NULL; | |
936 | struct net *net = sock_net(sk); | |
937 | u32 node, port, exclude; | |
938 | u32 type, inst, domain; | |
939 | struct list_head dsts; | |
940 | int lookups = 0; | |
941 | int dstcnt, rc; | |
942 | bool cong; | |
943 | ||
944 | INIT_LIST_HEAD(&dsts); | |
945 | ||
946 | type = dest->addr.name.name.type; | |
947 | inst = dest->addr.name.name.instance; | |
948 | domain = addr_domain(net, dest->scope); | |
ee106d7f JM |
949 | |
950 | while (++lookups < 4) { | |
05231d67 CW |
951 | exclude = tipc_group_exclude(tsk->group); |
952 | ||
ee106d7f JM |
953 | first = NULL; |
954 | ||
955 | /* Look for a non-congested destination member, if any */ | |
956 | while (1) { | |
957 | if (!tipc_nametbl_lookup(net, type, inst, domain, &dsts, | |
958 | &dstcnt, exclude, false)) | |
959 | return -EHOSTUNREACH; | |
960 | tipc_dest_pop(&dsts, &node, &port); | |
05231d67 CW |
961 | cong = tipc_group_cong(tsk->group, node, port, blks, |
962 | &mbr); | |
ee106d7f JM |
963 | if (!cong) |
964 | break; | |
965 | if (mbr == first) | |
966 | break; | |
967 | if (!first) | |
968 | first = mbr; | |
969 | } | |
970 | ||
971 | /* Start over if destination was not in member list */ | |
972 | if (unlikely(!mbr)) | |
973 | continue; | |
974 | ||
975 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
976 | break; | |
977 | ||
978 | /* Block or return if destination link or member is congested */ | |
979 | rc = tipc_wait_for_cond(sock, &timeout, | |
980 | !tipc_dest_find(cong_links, node, 0) && | |
05231d67 CW |
981 | tsk->group && |
982 | !tipc_group_cong(tsk->group, node, port, | |
ee106d7f JM |
983 | blks, &mbr)); |
984 | if (unlikely(rc)) | |
985 | return rc; | |
986 | ||
987 | /* Send, unless destination disappeared while waiting */ | |
988 | if (likely(mbr)) | |
989 | break; | |
990 | } | |
991 | ||
992 | if (unlikely(lookups >= 4)) | |
993 | return -EHOSTUNREACH; | |
994 | ||
995 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
996 | ||
997 | return rc ? rc : dlen; | |
998 | } | |
999 | ||
75da2163 JM |
1000 | /** |
1001 | * tipc_send_group_bcast - send message to all members in communication group | |
1002 | * @sk: socket structure | |
1003 | * @m: message to send | |
1004 | * @dlen: total length of message data | |
1005 | * @timeout: timeout to wait for wakeup | |
1006 | * | |
1007 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1008 | * Returns the number of bytes sent on success, or errno | |
1009 | */ | |
1010 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1011 | int dlen, long timeout) | |
1012 | { | |
5b8dddb6 | 1013 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
75da2163 JM |
1014 | struct sock *sk = sock->sk; |
1015 | struct net *net = sock_net(sk); | |
1016 | struct tipc_sock *tsk = tipc_sk(sk); | |
a8bab5f3 | 1017 | struct tipc_nlist *dsts; |
75da2163 | 1018 | struct tipc_mc_method *method = &tsk->mc_method; |
2f487712 | 1019 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1020 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1021 | struct tipc_msg *hdr = &tsk->phdr; |
1022 | int mtu = tipc_bcast_get_mtu(net); | |
1023 | struct sk_buff_head pkts; | |
1024 | int rc = -EHOSTUNREACH; | |
1025 | ||
b7d42635 | 1026 | /* Block or return if any destination link or member is congested */ |
05231d67 CW |
1027 | rc = tipc_wait_for_cond(sock, &timeout, |
1028 | !tsk->cong_link_cnt && tsk->group && | |
1029 | !tipc_group_bc_cong(tsk->group, blks)); | |
75da2163 JM |
1030 | if (unlikely(rc)) |
1031 | return rc; | |
1032 | ||
a8bab5f3 CW |
1033 | dsts = tipc_group_dests(tsk->group); |
1034 | if (!dsts->local && !dsts->remote) | |
1035 | return -EHOSTUNREACH; | |
1036 | ||
75da2163 | 1037 | /* Complete message header */ |
5b8dddb6 JM |
1038 | if (dest) { |
1039 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); | |
1040 | msg_set_nameinst(hdr, dest->addr.name.name.instance); | |
1041 | } else { | |
1042 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1043 | msg_set_nameinst(hdr, 0); | |
1044 | } | |
b7d42635 | 1045 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1046 | msg_set_destport(hdr, 0); |
1047 | msg_set_destnode(hdr, 0); | |
05231d67 | 1048 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(tsk->group)); |
75da2163 | 1049 | |
2f487712 JM |
1050 | /* Avoid getting stuck with repeated forced replicasts */ |
1051 | msg_set_grp_bc_ack_req(hdr, ack); | |
1052 | ||
75da2163 JM |
1053 | /* Build message as chain of buffers */ |
1054 | skb_queue_head_init(&pkts); | |
1055 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
1056 | if (unlikely(rc != dlen)) | |
1057 | return rc; | |
1058 | ||
1059 | /* Send message */ | |
2f487712 | 1060 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1061 | if (unlikely(rc)) |
1062 | return rc; | |
1063 | ||
b7d42635 | 1064 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1065 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1066 | ||
1067 | /* Broadcast link is now free to choose method for next broadcast */ | |
1068 | method->mandatory = false; | |
1069 | method->expires = jiffies; | |
1070 | ||
75da2163 JM |
1071 | return dlen; |
1072 | } | |
1073 | ||
5b8dddb6 JM |
1074 | /** |
1075 | * tipc_send_group_mcast - send message to all members with given identity | |
1076 | * @sock: socket structure | |
1077 | * @m: message to send | |
1078 | * @dlen: total length of message data | |
1079 | * @timeout: timeout to wait for wakeup | |
1080 | * | |
1081 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1082 | * Returns the number of bytes sent on success, or errno | |
1083 | */ | |
1084 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1085 | int dlen, long timeout) | |
1086 | { | |
1087 | struct sock *sk = sock->sk; | |
1088 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1089 | struct tipc_name_seq *seq = &dest->addr.nameseq; | |
1090 | struct tipc_sock *tsk = tipc_sk(sk); | |
1091 | struct tipc_group *grp = tsk->group; | |
1092 | struct net *net = sock_net(sk); | |
1093 | u32 domain, exclude, dstcnt; | |
1094 | struct list_head dsts; | |
1095 | ||
1096 | INIT_LIST_HEAD(&dsts); | |
1097 | ||
1098 | if (seq->lower != seq->upper) | |
1099 | return -ENOTSUPP; | |
1100 | ||
1101 | domain = addr_domain(net, dest->scope); | |
1102 | exclude = tipc_group_exclude(grp); | |
1103 | if (!tipc_nametbl_lookup(net, seq->type, seq->lower, domain, | |
1104 | &dsts, &dstcnt, exclude, true)) | |
1105 | return -EHOSTUNREACH; | |
1106 | ||
1107 | if (dstcnt == 1) { | |
1108 | tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref); | |
1109 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
1110 | } | |
1111 | ||
1112 | tipc_dest_list_purge(&dsts); | |
1113 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1114 | } | |
1115 | ||
cb1b7280 JPM |
1116 | /** |
1117 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
1118 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
1119 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1120 | * | |
1121 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1122 | */ |
cb1b7280 JPM |
1123 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1124 | struct sk_buff_head *inputq) | |
078bec82 | 1125 | { |
078bec82 | 1126 | u32 scope = TIPC_CLUSTER_SCOPE; |
75da2163 | 1127 | u32 self = tipc_own_addr(net); |
cb1b7280 | 1128 | struct sk_buff *skb, *_skb; |
75da2163 JM |
1129 | u32 lower = 0, upper = ~0; |
1130 | struct sk_buff_head tmpq; | |
1131 | u32 portid, oport, onode; | |
1132 | struct list_head dports; | |
1133 | struct tipc_msg *msg; | |
2f487712 | 1134 | int user, mtyp, hsz; |
3c724acd | 1135 | |
cb1b7280 | 1136 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1137 | INIT_LIST_HEAD(&dports); |
078bec82 | 1138 | |
cb1b7280 JPM |
1139 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1140 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
1141 | msg = buf_msg(skb); | |
2f487712 JM |
1142 | user = msg_user(msg); |
1143 | mtyp = msg_type(msg); | |
1144 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { | |
1145 | spin_lock_bh(&inputq->lock); | |
1146 | if (skb_peek(arrvq) == skb) { | |
1147 | __skb_dequeue(arrvq); | |
1148 | __skb_queue_tail(inputq, skb); | |
1149 | } | |
c545a945 | 1150 | kfree_skb(skb); |
2f487712 JM |
1151 | spin_unlock_bh(&inputq->lock); |
1152 | continue; | |
1153 | } | |
cb1b7280 | 1154 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); |
75da2163 JM |
1155 | oport = msg_origport(msg); |
1156 | onode = msg_orignode(msg); | |
1157 | if (onode == self) | |
cb1b7280 JPM |
1158 | scope = TIPC_NODE_SCOPE; |
1159 | ||
1160 | /* Create destination port list and message clones: */ | |
75da2163 JM |
1161 | if (!msg_in_group(msg)) { |
1162 | lower = msg_namelower(msg); | |
1163 | upper = msg_nameupper(msg); | |
1164 | } | |
1165 | tipc_nametbl_mc_translate(net, msg_nametype(msg), lower, upper, | |
1166 | scope, &dports); | |
a80ae530 | 1167 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
cb1b7280 JPM |
1168 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); |
1169 | if (_skb) { | |
1170 | msg_set_destport(buf_msg(_skb), portid); | |
1171 | __skb_queue_tail(&tmpq, _skb); | |
1172 | continue; | |
1173 | } | |
1174 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1175 | } |
cb1b7280 JPM |
1176 | /* Append to inputq if not already done by other thread */ |
1177 | spin_lock_bh(&inputq->lock); | |
1178 | if (skb_peek(arrvq) == skb) { | |
1179 | skb_queue_splice_tail_init(&tmpq, inputq); | |
1180 | kfree_skb(__skb_dequeue(arrvq)); | |
1181 | } | |
1182 | spin_unlock_bh(&inputq->lock); | |
1183 | __skb_queue_purge(&tmpq); | |
1184 | kfree_skb(skb); | |
078bec82 | 1185 | } |
cb1b7280 | 1186 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1187 | } |
1188 | ||
ac0074ee | 1189 | /** |
64ac5f59 | 1190 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1191 | * @tsk: receiving socket |
bcd3ffd4 | 1192 | * @skb: pointer to message buffer. |
ac0074ee | 1193 | */ |
64ac5f59 JM |
1194 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
1195 | struct sk_buff_head *xmitq) | |
ac0074ee | 1196 | { |
bcd3ffd4 | 1197 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1198 | u32 onode = tsk_own_node(tsk); |
1199 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1200 | int mtyp = msg_type(hdr); |
10724cc7 | 1201 | bool conn_cong; |
bcd3ffd4 | 1202 | |
ac0074ee | 1203 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 1204 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
1205 | goto exit; |
1206 | ||
c1be7756 PB |
1207 | if (unlikely(msg_errcode(hdr))) { |
1208 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1209 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1210 | tsk_peer_port(tsk)); | |
1211 | sk->sk_state_change(sk); | |
1212 | goto exit; | |
1213 | } | |
1214 | ||
8ea642ee | 1215 | tsk->probe_unacked = false; |
ac0074ee | 1216 | |
bcd3ffd4 JPM |
1217 | if (mtyp == CONN_PROBE) { |
1218 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1219 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1220 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1221 | return; |
1222 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 1223 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
1224 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1225 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1226 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 1227 | if (conn_cong) |
bcd3ffd4 JPM |
1228 | sk->sk_write_space(sk); |
1229 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1230 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1231 | } |
ac0074ee | 1232 | exit: |
bcd3ffd4 | 1233 | kfree_skb(skb); |
ac0074ee JPM |
1234 | } |
1235 | ||
b97bf3fd | 1236 | /** |
247f0f3c | 1237 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1238 | * @sock: socket structure |
1239 | * @m: message to send | |
e2dafe87 | 1240 | * @dsz: amount of user data to be sent |
c4307285 | 1241 | * |
b97bf3fd | 1242 | * Message must have an destination specified explicitly. |
c4307285 | 1243 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1244 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1245 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1246 | * |
b97bf3fd PL |
1247 | * Returns the number of bytes sent on success, or errno otherwise |
1248 | */ | |
1b784140 | 1249 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1250 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1251 | { |
1252 | struct sock *sk = sock->sk; | |
1253 | int ret; | |
1254 | ||
1255 | lock_sock(sk); | |
1256 | ret = __tipc_sendmsg(sock, m, dsz); | |
1257 | release_sock(sk); | |
1258 | ||
1259 | return ret; | |
1260 | } | |
1261 | ||
365ad353 | 1262 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1263 | { |
0c3141e9 | 1264 | struct sock *sk = sock->sk; |
f2f9800d | 1265 | struct net *net = sock_net(sk); |
365ad353 JPM |
1266 | struct tipc_sock *tsk = tipc_sk(sk); |
1267 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1268 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
1269 | struct list_head *clinks = &tsk->cong_links; | |
1270 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1271 | struct tipc_group *grp = tsk->group; |
365ad353 | 1272 | struct tipc_msg *hdr = &tsk->phdr; |
f2f8036e | 1273 | struct tipc_name_seq *seq; |
365ad353 JPM |
1274 | struct sk_buff_head pkts; |
1275 | u32 type, inst, domain; | |
1276 | u32 dnode, dport; | |
1277 | int mtu, rc; | |
b97bf3fd | 1278 | |
365ad353 | 1279 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1280 | return -EMSGSIZE; |
365ad353 | 1281 | |
27bd9ec0 JM |
1282 | if (likely(dest)) { |
1283 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
1284 | return -EINVAL; | |
1285 | if (unlikely(dest->family != AF_TIPC)) | |
1286 | return -EINVAL; | |
1287 | } | |
1288 | ||
1289 | if (grp) { | |
1290 | if (!dest) | |
1291 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
ee106d7f JM |
1292 | if (dest->addrtype == TIPC_ADDR_NAME) |
1293 | return tipc_send_group_anycast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1294 | if (dest->addrtype == TIPC_ADDR_ID) |
1295 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
5b8dddb6 JM |
1296 | if (dest->addrtype == TIPC_ADDR_MCAST) |
1297 | return tipc_send_group_mcast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1298 | return -EINVAL; |
1299 | } | |
75da2163 | 1300 | |
f2f8036e | 1301 | if (unlikely(!dest)) { |
365ad353 | 1302 | dest = &tsk->peer; |
a26d0b79 | 1303 | if (!syn && dest->family != AF_TIPC) |
f2f8036e | 1304 | return -EDESTADDRREQ; |
f2f8036e | 1305 | } |
365ad353 | 1306 | |
365ad353 | 1307 | if (unlikely(syn)) { |
0c288c86 | 1308 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1309 | return -EPIPE; |
438adcaf | 1310 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1311 | return -EISCONN; |
1312 | if (tsk->published) | |
1313 | return -EOPNOTSUPP; | |
3388007b | 1314 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
1315 | tsk->conn_type = dest->addr.name.name.type; |
1316 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 1317 | } |
b97bf3fd | 1318 | } |
e2dafe87 | 1319 | |
365ad353 JPM |
1320 | seq = &dest->addr.nameseq; |
1321 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
1322 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 1323 | |
365ad353 JPM |
1324 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1325 | type = dest->addr.name.name.type; | |
1326 | inst = dest->addr.name.name.instance; | |
1327 | domain = dest->addr.name.domain; | |
e2dafe87 | 1328 | dnode = domain; |
365ad353 JPM |
1329 | msg_set_type(hdr, TIPC_NAMED_MSG); |
1330 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
1331 | msg_set_nametype(hdr, type); | |
1332 | msg_set_nameinst(hdr, inst); | |
1333 | msg_set_lookup_scope(hdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 1334 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
1335 | msg_set_destnode(hdr, dnode); |
1336 | msg_set_destport(hdr, dport); | |
39a0295f YX |
1337 | if (unlikely(!dport && !dnode)) |
1338 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
1339 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
1340 | dnode = dest->addr.id.node; | |
365ad353 JPM |
1341 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
1342 | msg_set_lookup_scope(hdr, 0); | |
1343 | msg_set_destnode(hdr, dnode); | |
1344 | msg_set_destport(hdr, dest->addr.id.ref); | |
1345 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
1346 | } |
1347 | ||
365ad353 | 1348 | /* Block or return if destination link is congested */ |
a80ae530 JM |
1349 | rc = tipc_wait_for_cond(sock, &timeout, |
1350 | !tipc_dest_find(clinks, dnode, 0)); | |
365ad353 JPM |
1351 | if (unlikely(rc)) |
1352 | return rc; | |
1353 | ||
1354 | skb_queue_head_init(&pkts); | |
f2f9800d | 1355 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
1356 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1357 | if (unlikely(rc != dlen)) | |
39a0295f | 1358 | return rc; |
e2dafe87 | 1359 | |
365ad353 JPM |
1360 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1361 | if (unlikely(rc == -ELINKCONG)) { | |
a80ae530 | 1362 | tipc_dest_push(clinks, dnode, 0); |
365ad353 JPM |
1363 | tsk->cong_link_cnt++; |
1364 | rc = 0; | |
1365 | } | |
e2dafe87 | 1366 | |
365ad353 JPM |
1367 | if (unlikely(syn && !rc)) |
1368 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1369 | ||
1370 | return rc ? rc : dlen; | |
b97bf3fd PL |
1371 | } |
1372 | ||
c4307285 | 1373 | /** |
365ad353 | 1374 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1375 | * @sock: socket structure |
4ccfe5e0 JPM |
1376 | * @m: data to send |
1377 | * @dsz: total length of data to be transmitted | |
c4307285 | 1378 | * |
4ccfe5e0 | 1379 | * Used for SOCK_STREAM data. |
c4307285 | 1380 | * |
4ccfe5e0 JPM |
1381 | * Returns the number of bytes sent on success (or partial success), |
1382 | * or errno if no data sent | |
b97bf3fd | 1383 | */ |
365ad353 | 1384 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1385 | { |
1386 | struct sock *sk = sock->sk; | |
1387 | int ret; | |
1388 | ||
1389 | lock_sock(sk); | |
365ad353 | 1390 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1391 | release_sock(sk); |
1392 | ||
1393 | return ret; | |
1394 | } | |
1395 | ||
365ad353 | 1396 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1397 | { |
0c3141e9 | 1398 | struct sock *sk = sock->sk; |
342dfc30 | 1399 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1400 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1401 | struct tipc_sock *tsk = tipc_sk(sk); | |
1402 | struct tipc_msg *hdr = &tsk->phdr; | |
1403 | struct net *net = sock_net(sk); | |
1404 | struct sk_buff_head pkts; | |
1405 | u32 dnode = tsk_peer_node(tsk); | |
1406 | int send, sent = 0; | |
1407 | int rc = 0; | |
1d835874 | 1408 | |
365ad353 | 1409 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1410 | |
365ad353 JPM |
1411 | if (unlikely(dlen > INT_MAX)) |
1412 | return -EMSGSIZE; | |
4ccfe5e0 | 1413 | |
365ad353 JPM |
1414 | /* Handle implicit connection setup */ |
1415 | if (unlikely(dest)) { | |
1416 | rc = __tipc_sendmsg(sock, m, dlen); | |
8e99f86c PB |
1417 | if (dlen && dlen == rc) { |
1418 | tsk->peer_caps = tipc_node_get_capabilities(net, dnode); | |
365ad353 | 1419 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); |
8e99f86c | 1420 | } |
39a0295f | 1421 | return rc; |
365ad353 | 1422 | } |
f214fc40 | 1423 | |
c4307285 | 1424 | do { |
365ad353 JPM |
1425 | rc = tipc_wait_for_cond(sock, &timeout, |
1426 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1427 | !tsk_conn_cong(tsk) && |
1428 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1429 | if (unlikely(rc)) |
1430 | break; | |
1431 | ||
1432 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1433 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1434 | if (unlikely(rc != send)) | |
1435 | break; | |
1436 | ||
1437 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1438 | if (unlikely(rc == -ELINKCONG)) { | |
1439 | tsk->cong_link_cnt = 1; | |
1440 | rc = 0; | |
1441 | } | |
1442 | if (likely(!rc)) { | |
1443 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1444 | sent += send; | |
1445 | } | |
1446 | } while (sent < dlen && !rc); | |
39a0295f | 1447 | |
3364d61c | 1448 | return sent ? sent : rc; |
b97bf3fd PL |
1449 | } |
1450 | ||
c4307285 | 1451 | /** |
4ccfe5e0 | 1452 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1453 | * @sock: socket structure |
4ccfe5e0 JPM |
1454 | * @m: message to send |
1455 | * @dsz: length of data to be transmitted | |
c4307285 | 1456 | * |
4ccfe5e0 | 1457 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1458 | * |
4ccfe5e0 | 1459 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1460 | */ |
1b784140 | 1461 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1462 | { |
4ccfe5e0 JPM |
1463 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1464 | return -EMSGSIZE; | |
b97bf3fd | 1465 | |
365ad353 | 1466 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1467 | } |
1468 | ||
dadebc00 | 1469 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1470 | */ |
301bae56 | 1471 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1472 | u32 peer_node) |
b97bf3fd | 1473 | { |
3721e9c7 YX |
1474 | struct sock *sk = &tsk->sk; |
1475 | struct net *net = sock_net(sk); | |
301bae56 | 1476 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1477 | |
dadebc00 JPM |
1478 | msg_set_destnode(msg, peer_node); |
1479 | msg_set_destport(msg, peer_port); | |
1480 | msg_set_type(msg, TIPC_CONN_MSG); | |
1481 | msg_set_lookup_scope(msg, 0); | |
1482 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1483 | |
0d5fcebf | 1484 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1485 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1486 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1487 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1488 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1489 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1490 | return; | |
1491 | ||
1492 | /* Fall back to message based flow control */ | |
1493 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1494 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1495 | } |
1496 | ||
1497 | /** | |
31c82a2d | 1498 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1499 | * @m: descriptor for message info |
31c82a2d | 1500 | * @hdr: received message header |
c4307285 | 1501 | * |
b97bf3fd PL |
1502 | * Note: Address is not captured if not requested by receiver. |
1503 | */ | |
31c82a2d | 1504 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1505 | { |
31c82a2d JM |
1506 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1507 | struct tipc_msg *hdr = buf_msg(skb); | |
1508 | ||
1509 | if (!srcaddr) | |
1510 | return; | |
1511 | ||
1512 | srcaddr->sock.family = AF_TIPC; | |
1513 | srcaddr->sock.addrtype = TIPC_ADDR_ID; | |
cffaf72c | 1514 | srcaddr->sock.scope = 0; |
31c82a2d JM |
1515 | srcaddr->sock.addr.id.ref = msg_origport(hdr); |
1516 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1517 | srcaddr->sock.addr.name.domain = 0; | |
31c82a2d JM |
1518 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1519 | ||
1520 | if (!msg_in_group(hdr)) | |
1521 | return; | |
1522 | ||
1523 | /* Group message users may also want to know sending member's id */ | |
1524 | srcaddr->member.family = AF_TIPC; | |
1525 | srcaddr->member.addrtype = TIPC_ADDR_NAME; | |
cffaf72c | 1526 | srcaddr->member.scope = 0; |
31c82a2d JM |
1527 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); |
1528 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1529 | srcaddr->member.addr.name.domain = 0; | |
1530 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1531 | } |
1532 | ||
1533 | /** | |
301bae56 | 1534 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd | 1535 | * @m: descriptor for message info |
14cdd2bb | 1536 | * @skb: received message buffer |
301bae56 | 1537 | * @tsk: TIPC port associated with message |
c4307285 | 1538 | * |
b97bf3fd | 1539 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1540 | * |
b97bf3fd PL |
1541 | * Returns 0 if successful, otherwise errno |
1542 | */ | |
14cdd2bb | 1543 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct sk_buff *skb, |
301bae56 | 1544 | struct tipc_sock *tsk) |
b97bf3fd | 1545 | { |
14cdd2bb | 1546 | struct tipc_msg *msg; |
b97bf3fd PL |
1547 | u32 anc_data[3]; |
1548 | u32 err; | |
1549 | u32 dest_type; | |
3546c750 | 1550 | int has_name; |
b97bf3fd PL |
1551 | int res; |
1552 | ||
1553 | if (likely(m->msg_controllen == 0)) | |
1554 | return 0; | |
14cdd2bb | 1555 | msg = buf_msg(skb); |
b97bf3fd PL |
1556 | |
1557 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1558 | err = msg ? msg_errcode(msg) : 0; |
1559 | if (unlikely(err)) { | |
1560 | anc_data[0] = err; | |
1561 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1562 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1563 | if (res) | |
b97bf3fd | 1564 | return res; |
2db9983a | 1565 | if (anc_data[1]) { |
14cdd2bb JM |
1566 | if (skb_linearize(skb)) |
1567 | return -ENOMEM; | |
1568 | msg = buf_msg(skb); | |
2db9983a AS |
1569 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
1570 | msg_data(msg)); | |
1571 | if (res) | |
1572 | return res; | |
1573 | } | |
b97bf3fd PL |
1574 | } |
1575 | ||
1576 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1577 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1578 | switch (dest_type) { | |
1579 | case TIPC_NAMED_MSG: | |
3546c750 | 1580 | has_name = 1; |
b97bf3fd PL |
1581 | anc_data[0] = msg_nametype(msg); |
1582 | anc_data[1] = msg_namelower(msg); | |
1583 | anc_data[2] = msg_namelower(msg); | |
1584 | break; | |
1585 | case TIPC_MCAST_MSG: | |
3546c750 | 1586 | has_name = 1; |
b97bf3fd PL |
1587 | anc_data[0] = msg_nametype(msg); |
1588 | anc_data[1] = msg_namelower(msg); | |
1589 | anc_data[2] = msg_nameupper(msg); | |
1590 | break; | |
1591 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1592 | has_name = (tsk->conn_type != 0); |
1593 | anc_data[0] = tsk->conn_type; | |
1594 | anc_data[1] = tsk->conn_instance; | |
1595 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1596 | break; |
1597 | default: | |
3546c750 | 1598 | has_name = 0; |
b97bf3fd | 1599 | } |
2db9983a AS |
1600 | if (has_name) { |
1601 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1602 | if (res) | |
1603 | return res; | |
1604 | } | |
b97bf3fd PL |
1605 | |
1606 | return 0; | |
1607 | } | |
1608 | ||
10724cc7 | 1609 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1610 | { |
d6fb7e9c PB |
1611 | struct sock *sk = &tsk->sk; |
1612 | struct net *net = sock_net(sk); | |
a6ca1094 | 1613 | struct sk_buff *skb = NULL; |
739f5e4e | 1614 | struct tipc_msg *msg; |
301bae56 JPM |
1615 | u32 peer_port = tsk_peer_port(tsk); |
1616 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1617 | |
d6fb7e9c | 1618 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1619 | return; |
c5898636 JPM |
1620 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1621 | dnode, tsk_own_node(tsk), peer_port, | |
1622 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1623 | if (!skb) |
739f5e4e | 1624 | return; |
a6ca1094 | 1625 | msg = buf_msg(skb); |
10724cc7 JPM |
1626 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1627 | tsk->rcv_unacked = 0; | |
1628 | ||
1629 | /* Adjust to and advertize the correct window limit */ | |
1630 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1631 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1632 | msg_set_adv_win(msg, tsk->rcv_win); | |
1633 | } | |
af9b028e | 1634 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1635 | } |
1636 | ||
85d3fc94 | 1637 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1638 | { |
1639 | struct sock *sk = sock->sk; | |
1640 | DEFINE_WAIT(wait); | |
85d3fc94 | 1641 | long timeo = *timeop; |
4e0df495 PB |
1642 | int err = sock_error(sk); |
1643 | ||
1644 | if (err) | |
1645 | return err; | |
9bbb4ecc YX |
1646 | |
1647 | for (;;) { | |
1648 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1649 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1650 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1651 | err = -ENOTCONN; |
1652 | break; | |
1653 | } | |
1654 | release_sock(sk); | |
1655 | timeo = schedule_timeout(timeo); | |
1656 | lock_sock(sk); | |
1657 | } | |
1658 | err = 0; | |
1659 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1660 | break; | |
9bbb4ecc YX |
1661 | err = -EAGAIN; |
1662 | if (!timeo) | |
1663 | break; | |
143fe22f EH |
1664 | err = sock_intr_errno(timeo); |
1665 | if (signal_pending(current)) | |
1666 | break; | |
4e0df495 PB |
1667 | |
1668 | err = sock_error(sk); | |
1669 | if (err) | |
1670 | break; | |
9bbb4ecc YX |
1671 | } |
1672 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1673 | *timeop = timeo; |
9bbb4ecc YX |
1674 | return err; |
1675 | } | |
1676 | ||
c4307285 | 1677 | /** |
247f0f3c | 1678 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd | 1679 | * @m: descriptor for message info |
e9f8b101 | 1680 | * @buflen: length of user buffer area |
b97bf3fd | 1681 | * @flags: receive flags |
c4307285 | 1682 | * |
b97bf3fd PL |
1683 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1684 | * If the complete message doesn't fit in user area, truncate it. | |
1685 | * | |
1686 | * Returns size of returned message data, errno otherwise | |
1687 | */ | |
e9f8b101 JPM |
1688 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1689 | size_t buflen, int flags) | |
b97bf3fd | 1690 | { |
0c3141e9 | 1691 | struct sock *sk = sock->sk; |
e9f8b101 | 1692 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1693 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1694 | int rc, err, hlen, dlen, copy; |
b7d42635 | 1695 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1696 | struct tipc_msg *hdr; |
1697 | struct sk_buff *skb; | |
1698 | bool grp_evt; | |
e9f8b101 | 1699 | long timeout; |
b97bf3fd | 1700 | |
0c3141e9 | 1701 | /* Catch invalid receive requests */ |
e9f8b101 | 1702 | if (unlikely(!buflen)) |
b97bf3fd PL |
1703 | return -EINVAL; |
1704 | ||
0c3141e9 | 1705 | lock_sock(sk); |
e9f8b101 JPM |
1706 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1707 | rc = -ENOTCONN; | |
b97bf3fd PL |
1708 | goto exit; |
1709 | } | |
e9f8b101 | 1710 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1711 | |
b7d42635 | 1712 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1713 | do { |
e9f8b101 JPM |
1714 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1715 | if (unlikely(rc)) | |
1716 | goto exit; | |
1717 | skb = skb_peek(&sk->sk_receive_queue); | |
1718 | hdr = buf_msg(skb); | |
1719 | dlen = msg_data_sz(hdr); | |
1720 | hlen = msg_hdr_sz(hdr); | |
1721 | err = msg_errcode(hdr); | |
ae236fb2 | 1722 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1723 | if (likely(dlen || err)) |
1724 | break; | |
2e84c60b | 1725 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1726 | } while (1); |
b97bf3fd | 1727 | |
e9f8b101 | 1728 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1729 | tipc_sk_set_orig_addr(m, skb); |
14cdd2bb | 1730 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
e9f8b101 | 1731 | if (unlikely(rc)) |
b97bf3fd | 1732 | goto exit; |
14cdd2bb | 1733 | hdr = buf_msg(skb); |
b97bf3fd | 1734 | |
e9f8b101 JPM |
1735 | /* Capture data if non-error msg, otherwise just set return value */ |
1736 | if (likely(!err)) { | |
1737 | copy = min_t(int, dlen, buflen); | |
1738 | if (unlikely(copy != dlen)) | |
b97bf3fd | 1739 | m->msg_flags |= MSG_TRUNC; |
e9f8b101 | 1740 | rc = skb_copy_datagram_msg(skb, hlen, m, copy); |
b97bf3fd | 1741 | } else { |
e9f8b101 JPM |
1742 | copy = 0; |
1743 | rc = 0; | |
1744 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) | |
1745 | rc = -ECONNRESET; | |
b97bf3fd | 1746 | } |
e9f8b101 JPM |
1747 | if (unlikely(rc)) |
1748 | goto exit; | |
b97bf3fd | 1749 | |
ae236fb2 JM |
1750 | /* Mark message as group event if applicable */ |
1751 | if (unlikely(grp_evt)) { | |
1752 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1753 | m->msg_flags |= MSG_EOR; | |
1754 | m->msg_flags |= MSG_OOB; | |
1755 | copy = 0; | |
1756 | } | |
1757 | ||
e9f8b101 | 1758 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1759 | if (unlikely(flags & MSG_PEEK)) |
1760 | goto exit; | |
1761 | ||
b7d42635 JM |
1762 | /* Send group flow control advertisement when applicable */ |
1763 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
1764 | skb_queue_head_init(&xmitq); | |
1765 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), | |
1766 | msg_orignode(hdr), msg_origport(hdr), | |
1767 | &xmitq); | |
1768 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1769 | } | |
1770 | ||
10724cc7 | 1771 | tsk_advance_rx_queue(sk); |
ae236fb2 | 1772 | |
e9f8b101 JPM |
1773 | if (likely(!connected)) |
1774 | goto exit; | |
1775 | ||
b7d42635 | 1776 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1777 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1778 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1779 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1780 | exit: |
0c3141e9 | 1781 | release_sock(sk); |
e9f8b101 | 1782 | return rc ? rc : copy; |
b97bf3fd PL |
1783 | } |
1784 | ||
c4307285 | 1785 | /** |
ec8a09fb | 1786 | * tipc_recvstream - receive stream-oriented data |
b97bf3fd | 1787 | * @m: descriptor for message info |
ec8a09fb | 1788 | * @buflen: total size of user buffer area |
b97bf3fd | 1789 | * @flags: receive flags |
c4307285 YH |
1790 | * |
1791 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1792 | * will optionally wait for more; never truncates data. |
1793 | * | |
1794 | * Returns size of returned message data, errno otherwise | |
1795 | */ | |
ec8a09fb JPM |
1796 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
1797 | size_t buflen, int flags) | |
b97bf3fd | 1798 | { |
0c3141e9 | 1799 | struct sock *sk = sock->sk; |
58ed9442 | 1800 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
1801 | struct sk_buff *skb; |
1802 | struct tipc_msg *hdr; | |
1803 | struct tipc_skb_cb *skb_cb; | |
1804 | bool peek = flags & MSG_PEEK; | |
1805 | int offset, required, copy, copied = 0; | |
1806 | int hlen, dlen, err, rc; | |
1807 | long timeout; | |
b97bf3fd | 1808 | |
0c3141e9 | 1809 | /* Catch invalid receive attempts */ |
ec8a09fb | 1810 | if (unlikely(!buflen)) |
b97bf3fd PL |
1811 | return -EINVAL; |
1812 | ||
0c3141e9 | 1813 | lock_sock(sk); |
b97bf3fd | 1814 | |
438adcaf | 1815 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 1816 | rc = -ENOTCONN; |
9bbb4ecc | 1817 | goto exit; |
b97bf3fd | 1818 | } |
ec8a09fb JPM |
1819 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
1820 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 1821 | |
ec8a09fb JPM |
1822 | do { |
1823 | /* Look at first msg in receive queue; wait if necessary */ | |
1824 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
1825 | if (unlikely(rc)) | |
1826 | break; | |
1827 | skb = skb_peek(&sk->sk_receive_queue); | |
1828 | skb_cb = TIPC_SKB_CB(skb); | |
1829 | hdr = buf_msg(skb); | |
1830 | dlen = msg_data_sz(hdr); | |
1831 | hlen = msg_hdr_sz(hdr); | |
1832 | err = msg_errcode(hdr); | |
0232fd0a | 1833 | |
ec8a09fb JPM |
1834 | /* Discard any empty non-errored (SYN-) message */ |
1835 | if (unlikely(!dlen && !err)) { | |
1836 | tsk_advance_rx_queue(sk); | |
1837 | continue; | |
1838 | } | |
0232fd0a | 1839 | |
ec8a09fb JPM |
1840 | /* Collect msg meta data, incl. error code and rejected data */ |
1841 | if (!copied) { | |
31c82a2d | 1842 | tipc_sk_set_orig_addr(m, skb); |
14cdd2bb | 1843 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
ec8a09fb JPM |
1844 | if (rc) |
1845 | break; | |
14cdd2bb | 1846 | hdr = buf_msg(skb); |
ec8a09fb | 1847 | } |
b97bf3fd | 1848 | |
ec8a09fb JPM |
1849 | /* Copy data if msg ok, otherwise return error/partial data */ |
1850 | if (likely(!err)) { | |
1851 | offset = skb_cb->bytes_read; | |
1852 | copy = min_t(int, dlen - offset, buflen - copied); | |
1853 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1854 | if (unlikely(rc)) | |
1855 | break; | |
1856 | copied += copy; | |
1857 | offset += copy; | |
1858 | if (unlikely(offset < dlen)) { | |
1859 | if (!peek) | |
1860 | skb_cb->bytes_read = offset; | |
1861 | break; | |
1862 | } | |
1863 | } else { | |
1864 | rc = 0; | |
1865 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
1866 | rc = -ECONNRESET; | |
1867 | if (copied || rc) | |
1868 | break; | |
b97bf3fd | 1869 | } |
b97bf3fd | 1870 | |
ec8a09fb JPM |
1871 | if (unlikely(peek)) |
1872 | break; | |
b97bf3fd | 1873 | |
ec8a09fb | 1874 | tsk_advance_rx_queue(sk); |
10724cc7 | 1875 | |
ec8a09fb JPM |
1876 | /* Send connection flow control advertisement when applicable */ |
1877 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
1878 | if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)) | |
1879 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1880 | |
ec8a09fb JPM |
1881 | /* Exit if all requested data or FIN/error received */ |
1882 | if (copied == buflen || err) | |
1883 | break; | |
b97bf3fd | 1884 | |
ec8a09fb | 1885 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 1886 | exit: |
0c3141e9 | 1887 | release_sock(sk); |
ec8a09fb | 1888 | return copied ? copied : rc; |
b97bf3fd PL |
1889 | } |
1890 | ||
f288bef4 YX |
1891 | /** |
1892 | * tipc_write_space - wake up thread if port congestion is released | |
1893 | * @sk: socket | |
1894 | */ | |
1895 | static void tipc_write_space(struct sock *sk) | |
1896 | { | |
1897 | struct socket_wq *wq; | |
1898 | ||
1899 | rcu_read_lock(); | |
1900 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1901 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1902 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1903 | POLLWRNORM | POLLWRBAND); | |
1904 | rcu_read_unlock(); | |
1905 | } | |
1906 | ||
1907 | /** | |
1908 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1909 | * @sk: socket | |
1910 | * @len: the length of messages | |
1911 | */ | |
676d2369 | 1912 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1913 | { |
1914 | struct socket_wq *wq; | |
1915 | ||
1916 | rcu_read_lock(); | |
1917 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1918 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1919 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1920 | POLLRDNORM | POLLRDBAND); | |
1921 | rcu_read_unlock(); | |
1922 | } | |
1923 | ||
f4195d1e YX |
1924 | static void tipc_sock_destruct(struct sock *sk) |
1925 | { | |
1926 | __skb_queue_purge(&sk->sk_receive_queue); | |
1927 | } | |
1928 | ||
64ac5f59 JM |
1929 | static void tipc_sk_proto_rcv(struct sock *sk, |
1930 | struct sk_buff_head *inputq, | |
1931 | struct sk_buff_head *xmitq) | |
1932 | { | |
1933 | struct sk_buff *skb = __skb_dequeue(inputq); | |
1934 | struct tipc_sock *tsk = tipc_sk(sk); | |
1935 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 1936 | struct tipc_group *grp = tsk->group; |
b7d42635 | 1937 | bool wakeup = false; |
64ac5f59 JM |
1938 | |
1939 | switch (msg_user(hdr)) { | |
1940 | case CONN_MANAGER: | |
1941 | tipc_sk_conn_proto_rcv(tsk, skb, xmitq); | |
1942 | return; | |
1943 | case SOCK_WAKEUP: | |
a80ae530 | 1944 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
d500ac29 TN |
1945 | /* coupled with smp_rmb() in tipc_wait_for_cond() */ |
1946 | smp_wmb(); | |
64ac5f59 | 1947 | tsk->cong_link_cnt--; |
b7d42635 | 1948 | wakeup = true; |
64ac5f59 | 1949 | break; |
75da2163 | 1950 | case GROUP_PROTOCOL: |
b7d42635 | 1951 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 1952 | break; |
64ac5f59 | 1953 | case TOP_SRV: |
b7d42635 JM |
1954 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
1955 | skb, inputq, xmitq); | |
75da2163 | 1956 | skb = NULL; |
64ac5f59 JM |
1957 | break; |
1958 | default: | |
1959 | break; | |
1960 | } | |
1961 | ||
b7d42635 JM |
1962 | if (wakeup) |
1963 | sk->sk_write_space(sk); | |
1964 | ||
64ac5f59 JM |
1965 | kfree_skb(skb); |
1966 | } | |
1967 | ||
7e6c131e | 1968 | /** |
64ac5f59 | 1969 | * tipc_filter_connect - Handle incoming message for a connection-based socket |
58ed9442 | 1970 | * @tsk: TIPC socket |
1186adf7 | 1971 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1972 | * |
cda3696d | 1973 | * Returns true if everything ok, false otherwise |
7e6c131e | 1974 | */ |
64ac5f59 | 1975 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1976 | { |
58ed9442 | 1977 | struct sock *sk = &tsk->sk; |
f2f9800d | 1978 | struct net *net = sock_net(sk); |
cda3696d | 1979 | struct tipc_msg *hdr = buf_msg(skb); |
4e0df495 PB |
1980 | u32 pport = msg_origport(hdr); |
1981 | u32 pnode = msg_orignode(hdr); | |
7e6c131e | 1982 | |
cda3696d JPM |
1983 | if (unlikely(msg_mcast(hdr))) |
1984 | return false; | |
7e6c131e | 1985 | |
99a20889 PB |
1986 | switch (sk->sk_state) { |
1987 | case TIPC_CONNECTING: | |
cda3696d | 1988 | /* Accept only ACK or NACK message */ |
4e0df495 PB |
1989 | if (unlikely(!msg_connected(hdr))) { |
1990 | if (pport != tsk_peer_port(tsk) || | |
1991 | pnode != tsk_peer_node(tsk)) | |
1992 | return false; | |
1993 | ||
1994 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1995 | sk->sk_err = ECONNREFUSED; | |
1996 | sk->sk_state_change(sk); | |
1997 | return true; | |
1998 | } | |
dadebc00 | 1999 | |
cda3696d | 2000 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 2001 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 2002 | sk->sk_err = ECONNREFUSED; |
4e0df495 | 2003 | sk->sk_state_change(sk); |
cda3696d | 2004 | return true; |
584d24b3 YX |
2005 | } |
2006 | ||
cda3696d | 2007 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 2008 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 2009 | sk->sk_err = EINVAL; |
4e0df495 | 2010 | sk->sk_state_change(sk); |
cda3696d | 2011 | return true; |
584d24b3 YX |
2012 | } |
2013 | ||
cda3696d JPM |
2014 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
2015 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 2016 | |
cda3696d JPM |
2017 | /* If 'ACK+' message, add to socket receive queue */ |
2018 | if (msg_data_sz(hdr)) | |
2019 | return true; | |
2020 | ||
2021 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
42b531de | 2022 | sk->sk_data_ready(sk); |
cda3696d JPM |
2023 | |
2024 | /* 'ACK-' message is neither accepted nor rejected: */ | |
2025 | msg_set_dest_droppable(hdr, 1); | |
2026 | return false; | |
cda3696d | 2027 | |
438adcaf | 2028 | case TIPC_OPEN: |
9fd4b070 | 2029 | case TIPC_DISCONNECTING: |
438adcaf PB |
2030 | break; |
2031 | case TIPC_LISTEN: | |
7e6c131e | 2032 | /* Accept only SYN message */ |
cda3696d JPM |
2033 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
2034 | return true; | |
7e6c131e | 2035 | break; |
f40acbaf PB |
2036 | case TIPC_ESTABLISHED: |
2037 | /* Accept only connection-based messages sent by peer */ | |
2038 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
2039 | return false; | |
2040 | ||
2041 | if (unlikely(msg_errcode(hdr))) { | |
2042 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2043 | /* Let timer expire on it's own */ | |
2044 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
2045 | tsk->portid); | |
2046 | sk->sk_state_change(sk); | |
2047 | } | |
2048 | return true; | |
7e6c131e | 2049 | default: |
438adcaf | 2050 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2051 | } |
438adcaf | 2052 | |
cda3696d | 2053 | return false; |
7e6c131e YX |
2054 | } |
2055 | ||
aba79f33 YX |
2056 | /** |
2057 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2058 | * @sk: socket | |
10724cc7 | 2059 | * @skb: message |
aba79f33 | 2060 | * |
10724cc7 JPM |
2061 | * For connection oriented messages, irrespective of importance, |
2062 | * default queue limit is 2 MB. | |
aba79f33 | 2063 | * |
10724cc7 JPM |
2064 | * For connectionless messages, queue limits are based on message |
2065 | * importance as follows: | |
aba79f33 | 2066 | * |
10724cc7 JPM |
2067 | * TIPC_LOW_IMPORTANCE (2 MB) |
2068 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2069 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2070 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
2071 | * |
2072 | * Returns overload limit according to corresponding message importance | |
2073 | */ | |
10724cc7 | 2074 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2075 | { |
10724cc7 JPM |
2076 | struct tipc_sock *tsk = tipc_sk(sk); |
2077 | struct tipc_msg *hdr = buf_msg(skb); | |
2078 | ||
b7d42635 JM |
2079 | if (unlikely(msg_in_group(hdr))) |
2080 | return sk->sk_rcvbuf; | |
2081 | ||
10724cc7 JPM |
2082 | if (unlikely(!msg_connected(hdr))) |
2083 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 2084 | |
10724cc7 JPM |
2085 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
2086 | return sk->sk_rcvbuf; | |
0cee6bbe | 2087 | |
10724cc7 | 2088 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2089 | } |
2090 | ||
c4307285 | 2091 | /** |
64ac5f59 | 2092 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2093 | * @sk: socket |
cda3696d | 2094 | * @skb: pointer to message. |
c4307285 | 2095 | * |
0c3141e9 AS |
2096 | * Enqueues message on receive queue if acceptable; optionally handles |
2097 | * disconnect indication for a connected socket. | |
2098 | * | |
1186adf7 | 2099 | * Called with socket lock already taken |
c4307285 | 2100 | * |
b97bf3fd | 2101 | */ |
64ac5f59 JM |
2102 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2103 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2104 | { |
64ac5f59 | 2105 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2106 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2107 | struct tipc_group *grp = tsk->group; |
cda3696d | 2108 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2109 | struct net *net = sock_net(sk); |
2110 | struct sk_buff_head inputq; | |
2111 | int limit, err = TIPC_OK; | |
ec8a2e56 | 2112 | |
64ac5f59 JM |
2113 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2114 | __skb_queue_head_init(&inputq); | |
2115 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2116 | |
64ac5f59 JM |
2117 | if (unlikely(!msg_isdata(hdr))) |
2118 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2119 | |
75da2163 JM |
2120 | if (unlikely(grp)) |
2121 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2122 | ||
64ac5f59 JM |
2123 | /* Validate and add to receive buffer if there is space */ |
2124 | while ((skb = __skb_dequeue(&inputq))) { | |
2125 | hdr = buf_msg(skb); | |
2126 | limit = rcvbuf_limit(sk, skb); | |
2127 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) || | |
75da2163 JM |
2128 | (!sk_conn && msg_connected(hdr)) || |
2129 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2130 | err = TIPC_ERR_NO_PORT; |
64ac5f59 JM |
2131 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) |
2132 | err = TIPC_ERR_OVERLOAD; | |
b97bf3fd | 2133 | |
64ac5f59 JM |
2134 | if (unlikely(err)) { |
2135 | tipc_skb_reject(net, err, skb, xmitq); | |
2136 | err = TIPC_OK; | |
2137 | continue; | |
2138 | } | |
2139 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
2140 | skb_set_owner_r(skb, sk); | |
2141 | sk->sk_data_ready(sk); | |
cda3696d | 2142 | } |
0c3141e9 | 2143 | } |
b97bf3fd | 2144 | |
0c3141e9 | 2145 | /** |
64ac5f59 | 2146 | * tipc_sk_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 2147 | * @sk: socket |
a6ca1094 | 2148 | * @skb: message |
0c3141e9 | 2149 | * |
e3a77561 | 2150 | * Caller must hold socket lock |
0c3141e9 | 2151 | */ |
64ac5f59 | 2152 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 2153 | { |
64ac5f59 | 2154 | unsigned int before = sk_rmem_alloc_get(sk); |
f1d048f2 | 2155 | struct sk_buff_head xmitq; |
64ac5f59 | 2156 | unsigned int added; |
0c3141e9 | 2157 | |
f1d048f2 JPM |
2158 | __skb_queue_head_init(&xmitq); |
2159 | ||
64ac5f59 JM |
2160 | tipc_sk_filter_rcv(sk, skb, &xmitq); |
2161 | added = sk_rmem_alloc_get(sk) - before; | |
2162 | atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt); | |
f1d048f2 | 2163 | |
64ac5f59 | 2164 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2165 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
0c3141e9 AS |
2166 | return 0; |
2167 | } | |
2168 | ||
d570d864 | 2169 | /** |
c637c103 JPM |
2170 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
2171 | * inputq and try adding them to socket or backlog queue | |
2172 | * @inputq: list of incoming buffers with potentially different destinations | |
2173 | * @sk: socket where the buffers should be enqueued | |
2174 | * @dport: port number for the socket | |
d570d864 JPM |
2175 | * |
2176 | * Caller must hold socket lock | |
d570d864 | 2177 | */ |
cda3696d | 2178 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 2179 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 2180 | { |
f1d048f2 JPM |
2181 | unsigned long time_limit = jiffies + 2; |
2182 | struct sk_buff *skb; | |
d570d864 JPM |
2183 | unsigned int lim; |
2184 | atomic_t *dcnt; | |
f1d048f2 | 2185 | u32 onode; |
c637c103 JPM |
2186 | |
2187 | while (skb_queue_len(inputq)) { | |
51a00daf | 2188 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
2189 | return; |
2190 | ||
c637c103 JPM |
2191 | skb = tipc_skb_dequeue(inputq, dport); |
2192 | if (unlikely(!skb)) | |
cda3696d JPM |
2193 | return; |
2194 | ||
2195 | /* Add message directly to receive queue if possible */ | |
c637c103 | 2196 | if (!sock_owned_by_user(sk)) { |
64ac5f59 | 2197 | tipc_sk_filter_rcv(sk, skb, xmitq); |
cda3696d | 2198 | continue; |
c637c103 | 2199 | } |
cda3696d JPM |
2200 | |
2201 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 2202 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 2203 | if (!sk->sk_backlog.len) |
c637c103 JPM |
2204 | atomic_set(dcnt, 0); |
2205 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
2206 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
2207 | continue; | |
cda3696d JPM |
2208 | |
2209 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
2210 | onode = tipc_own_addr(sock_net(sk)); |
2211 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
2212 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 2213 | break; |
c637c103 | 2214 | } |
d570d864 JPM |
2215 | } |
2216 | ||
0c3141e9 | 2217 | /** |
c637c103 JPM |
2218 | * tipc_sk_rcv - handle a chain of incoming buffers |
2219 | * @inputq: buffer list containing the buffers | |
2220 | * Consumes all buffers in list until inputq is empty | |
2221 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2222 | */ |
cda3696d | 2223 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2224 | { |
f1d048f2 | 2225 | struct sk_buff_head xmitq; |
c637c103 | 2226 | u32 dnode, dport = 0; |
9871b27f | 2227 | int err; |
9816f061 | 2228 | struct tipc_sock *tsk; |
9816f061 | 2229 | struct sock *sk; |
cda3696d | 2230 | struct sk_buff *skb; |
9816f061 | 2231 | |
f1d048f2 | 2232 | __skb_queue_head_init(&xmitq); |
c637c103 | 2233 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2234 | dport = tipc_skb_peek_port(inputq, dport); |
2235 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2236 | |
c637c103 JPM |
2237 | if (likely(tsk)) { |
2238 | sk = &tsk->sk; | |
2239 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2240 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2241 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2242 | } |
f1d048f2 | 2243 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2244 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2245 | sock_put(sk); |
c637c103 | 2246 | continue; |
c637c103 | 2247 | } |
cda3696d JPM |
2248 | /* No destination socket => dequeue skb if still there */ |
2249 | skb = tipc_skb_dequeue(inputq, dport); | |
2250 | if (!skb) | |
2251 | return; | |
2252 | ||
2253 | /* Try secondary lookup if unresolved named message */ | |
2254 | err = TIPC_ERR_NO_PORT; | |
2255 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2256 | goto xmit; | |
2257 | ||
2258 | /* Prepare for message rejection */ | |
2259 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2260 | continue; |
e3a77561 | 2261 | xmit: |
cda3696d | 2262 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2263 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2264 | } |
b97bf3fd PL |
2265 | } |
2266 | ||
78eb3a53 YX |
2267 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2268 | { | |
d9dc8b0f | 2269 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2270 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2271 | int done; |
2272 | ||
2273 | do { | |
2274 | int err = sock_error(sk); | |
2275 | if (err) | |
2276 | return err; | |
2277 | if (!*timeo_p) | |
2278 | return -ETIMEDOUT; | |
2279 | if (signal_pending(current)) | |
2280 | return sock_intr_errno(*timeo_p); | |
2281 | ||
d9dc8b0f | 2282 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 2283 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
2284 | sk->sk_state != TIPC_CONNECTING, &wait); |
2285 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
2286 | } while (!done); |
2287 | return 0; | |
2288 | } | |
2289 | ||
b97bf3fd | 2290 | /** |
247f0f3c | 2291 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2292 | * @sock: socket structure |
2293 | * @dest: socket address for destination port | |
2294 | * @destlen: size of socket address data structure | |
0c3141e9 | 2295 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
2296 | * |
2297 | * Returns 0 on success, errno otherwise | |
2298 | */ | |
247f0f3c YX |
2299 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2300 | int destlen, int flags) | |
b97bf3fd | 2301 | { |
0c3141e9 | 2302 | struct sock *sk = sock->sk; |
f2f8036e | 2303 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2304 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2305 | struct msghdr m = {NULL,}; | |
f2f8036e | 2306 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2307 | int previous; |
f2f8036e | 2308 | int res = 0; |
b89741a0 | 2309 | |
23998835 JM |
2310 | if (destlen != sizeof(struct sockaddr_tipc)) |
2311 | return -EINVAL; | |
2312 | ||
0c3141e9 AS |
2313 | lock_sock(sk); |
2314 | ||
75da2163 JM |
2315 | if (tsk->group) { |
2316 | res = -EINVAL; | |
2317 | goto exit; | |
2318 | } | |
2319 | ||
23998835 JM |
2320 | if (dst->family == AF_UNSPEC) { |
2321 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2322 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2323 | res = -EINVAL; |
0c3141e9 | 2324 | goto exit; |
23998835 JM |
2325 | } else if (dst->family != AF_TIPC) { |
2326 | res = -EINVAL; | |
0c3141e9 | 2327 | } |
23998835 | 2328 | if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME) |
0c3141e9 | 2329 | res = -EINVAL; |
23998835 JM |
2330 | if (res) |
2331 | goto exit; | |
2332 | ||
2333 | /* DGRAM/RDM connect(), just save the destaddr */ | |
2334 | if (tipc_sk_type_connectionless(sk)) { | |
2335 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 AS |
2336 | goto exit; |
2337 | } | |
2338 | ||
99a20889 | 2339 | previous = sk->sk_state; |
438adcaf PB |
2340 | |
2341 | switch (sk->sk_state) { | |
2342 | case TIPC_OPEN: | |
584d24b3 YX |
2343 | /* Send a 'SYN-' to destination */ |
2344 | m.msg_name = dest; | |
2345 | m.msg_namelen = destlen; | |
2346 | ||
2347 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2348 | * indicate send_msg() is never blocked. | |
2349 | */ | |
2350 | if (!timeout) | |
2351 | m.msg_flags = MSG_DONTWAIT; | |
2352 | ||
39a0295f | 2353 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2354 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2355 | goto exit; | |
2356 | ||
99a20889 | 2357 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2358 | * difference is that return value in non-blocking |
2359 | * case is EINPROGRESS, rather than EALREADY. | |
2360 | */ | |
2361 | res = -EINPROGRESS; | |
99a20889 PB |
2362 | /* fall thru' */ |
2363 | case TIPC_CONNECTING: | |
2364 | if (!timeout) { | |
2365 | if (previous == TIPC_CONNECTING) | |
2366 | res = -EALREADY; | |
78eb3a53 | 2367 | goto exit; |
99a20889 | 2368 | } |
78eb3a53 YX |
2369 | timeout = msecs_to_jiffies(timeout); |
2370 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2371 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2372 | break; |
2373 | case TIPC_ESTABLISHED: | |
584d24b3 | 2374 | res = -EISCONN; |
f40acbaf PB |
2375 | break; |
2376 | default: | |
584d24b3 | 2377 | res = -EINVAL; |
f40acbaf | 2378 | } |
99a20889 | 2379 | |
0c3141e9 AS |
2380 | exit: |
2381 | release_sock(sk); | |
b89741a0 | 2382 | return res; |
b97bf3fd PL |
2383 | } |
2384 | ||
c4307285 | 2385 | /** |
247f0f3c | 2386 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2387 | * @sock: socket structure |
2388 | * @len: (unused) | |
c4307285 | 2389 | * |
b97bf3fd PL |
2390 | * Returns 0 on success, errno otherwise |
2391 | */ | |
247f0f3c | 2392 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2393 | { |
0c3141e9 AS |
2394 | struct sock *sk = sock->sk; |
2395 | int res; | |
2396 | ||
2397 | lock_sock(sk); | |
0c288c86 | 2398 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2399 | release_sock(sk); |
0c288c86 | 2400 | |
0c3141e9 | 2401 | return res; |
b97bf3fd PL |
2402 | } |
2403 | ||
6398e23c YX |
2404 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2405 | { | |
2406 | struct sock *sk = sock->sk; | |
2407 | DEFINE_WAIT(wait); | |
2408 | int err; | |
2409 | ||
2410 | /* True wake-one mechanism for incoming connections: only | |
2411 | * one process gets woken up, not the 'whole herd'. | |
2412 | * Since we do not 'race & poll' for established sockets | |
2413 | * anymore, the common case will execute the loop only once. | |
2414 | */ | |
2415 | for (;;) { | |
2416 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2417 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2418 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2419 | release_sock(sk); |
2420 | timeo = schedule_timeout(timeo); | |
2421 | lock_sock(sk); | |
2422 | } | |
2423 | err = 0; | |
2424 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2425 | break; | |
6398e23c YX |
2426 | err = -EAGAIN; |
2427 | if (!timeo) | |
2428 | break; | |
143fe22f EH |
2429 | err = sock_intr_errno(timeo); |
2430 | if (signal_pending(current)) | |
2431 | break; | |
6398e23c YX |
2432 | } |
2433 | finish_wait(sk_sleep(sk), &wait); | |
2434 | return err; | |
2435 | } | |
2436 | ||
c4307285 | 2437 | /** |
247f0f3c | 2438 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2439 | * @sock: listening socket |
2440 | * @newsock: new socket that is to be connected | |
2441 | * @flags: file-related flags associated with socket | |
c4307285 | 2442 | * |
b97bf3fd PL |
2443 | * Returns 0 on success, errno otherwise |
2444 | */ | |
cdfbabfb DH |
2445 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2446 | bool kern) | |
b97bf3fd | 2447 | { |
0fef8f20 | 2448 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2449 | struct sk_buff *buf; |
301bae56 | 2450 | struct tipc_sock *new_tsock; |
0fef8f20 | 2451 | struct tipc_msg *msg; |
6398e23c | 2452 | long timeo; |
0c3141e9 | 2453 | int res; |
b97bf3fd | 2454 | |
0c3141e9 | 2455 | lock_sock(sk); |
b97bf3fd | 2456 | |
0c288c86 | 2457 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2458 | res = -EINVAL; |
b97bf3fd PL |
2459 | goto exit; |
2460 | } | |
6398e23c YX |
2461 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2462 | res = tipc_wait_for_accept(sock, timeo); | |
2463 | if (res) | |
2464 | goto exit; | |
0c3141e9 AS |
2465 | |
2466 | buf = skb_peek(&sk->sk_receive_queue); | |
2467 | ||
cdfbabfb | 2468 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2469 | if (res) |
2470 | goto exit; | |
fdd75ea8 | 2471 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2472 | |
0fef8f20 | 2473 | new_sk = new_sock->sk; |
301bae56 | 2474 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2475 | msg = buf_msg(buf); |
b97bf3fd | 2476 | |
0fef8f20 PG |
2477 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2478 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2479 | ||
2480 | /* | |
2481 | * Reject any stray messages received by new socket | |
2482 | * before the socket lock was taken (very, very unlikely) | |
2483 | */ | |
2e84c60b | 2484 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2485 | |
2486 | /* Connect new socket to it's peer */ | |
301bae56 | 2487 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2488 | |
301bae56 | 2489 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2490 | if (msg_named(msg)) { |
301bae56 JPM |
2491 | new_tsock->conn_type = msg_nametype(msg); |
2492 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2493 | } |
0fef8f20 PG |
2494 | |
2495 | /* | |
2496 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2497 | * Respond to 'SYN+' by queuing it on new socket. | |
2498 | */ | |
2499 | if (!msg_data_sz(msg)) { | |
2500 | struct msghdr m = {NULL,}; | |
2501 | ||
2e84c60b | 2502 | tsk_advance_rx_queue(sk); |
365ad353 | 2503 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2504 | } else { |
2505 | __skb_dequeue(&sk->sk_receive_queue); | |
2506 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2507 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2508 | } |
2509 | release_sock(new_sk); | |
b97bf3fd | 2510 | exit: |
0c3141e9 | 2511 | release_sock(sk); |
b97bf3fd PL |
2512 | return res; |
2513 | } | |
2514 | ||
2515 | /** | |
247f0f3c | 2516 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2517 | * @sock: socket structure |
e247a8f5 | 2518 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2519 | * |
2520 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2521 | * |
b97bf3fd PL |
2522 | * Returns 0 on success, errno otherwise |
2523 | */ | |
247f0f3c | 2524 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2525 | { |
0c3141e9 | 2526 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2527 | int res; |
2528 | ||
e247a8f5 AS |
2529 | if (how != SHUT_RDWR) |
2530 | return -EINVAL; | |
b97bf3fd | 2531 | |
0c3141e9 | 2532 | lock_sock(sk); |
b97bf3fd | 2533 | |
6f00089c PB |
2534 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2535 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2536 | |
6f00089c | 2537 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2538 | /* Discard any unreceived messages */ |
57467e56 | 2539 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2540 | |
2541 | /* Wake up anyone sleeping in poll */ | |
2542 | sk->sk_state_change(sk); | |
b97bf3fd | 2543 | res = 0; |
6f00089c | 2544 | } else { |
b97bf3fd PL |
2545 | res = -ENOTCONN; |
2546 | } | |
2547 | ||
0c3141e9 | 2548 | release_sock(sk); |
b97bf3fd PL |
2549 | return res; |
2550 | } | |
2551 | ||
31b102bb | 2552 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2553 | { |
31b102bb KC |
2554 | struct sock *sk = from_timer(sk, t, sk_timer); |
2555 | struct tipc_sock *tsk = tipc_sk(sk); | |
0d5fcebf JM |
2556 | u32 peer_port = tsk_peer_port(tsk); |
2557 | u32 peer_node = tsk_peer_node(tsk); | |
2558 | u32 own_node = tsk_own_node(tsk); | |
2559 | u32 own_port = tsk->portid; | |
0d5fcebf | 2560 | struct net *net = sock_net(sk); |
a6ca1094 | 2561 | struct sk_buff *skb = NULL; |
57289015 | 2562 | |
6c9808ce | 2563 | bh_lock_sock(sk); |
0d5fcebf JM |
2564 | if (!tipc_sk_connected(sk)) |
2565 | goto exit; | |
2566 | ||
2567 | /* Try again later if socket is busy */ | |
2568 | if (sock_owned_by_user(sk)) { | |
2569 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
6c9808ce | 2570 | goto exit; |
57289015 | 2571 | } |
57289015 | 2572 | |
8ea642ee | 2573 | if (tsk->probe_unacked) { |
0d5fcebf JM |
2574 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2575 | tipc_node_remove_conn(net, peer_node, peer_port); | |
2576 | sk->sk_state_change(sk); | |
360aab6b | 2577 | goto exit; |
57289015 | 2578 | } |
0d5fcebf JM |
2579 | /* Send new probe */ |
2580 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2581 | peer_node, own_node, peer_port, own_port, | |
2582 | TIPC_OK); | |
8ea642ee | 2583 | tsk->probe_unacked = true; |
0d5fcebf JM |
2584 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
2585 | exit: | |
57289015 | 2586 | bh_unlock_sock(sk); |
a6ca1094 | 2587 | if (skb) |
0d5fcebf | 2588 | tipc_node_xmit_skb(net, skb, peer_node, own_port); |
07f6c4bc | 2589 | sock_put(sk); |
57289015 JPM |
2590 | } |
2591 | ||
301bae56 | 2592 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2593 | struct tipc_name_seq const *seq) |
2594 | { | |
d6fb7e9c PB |
2595 | struct sock *sk = &tsk->sk; |
2596 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2597 | struct publication *publ; |
2598 | u32 key; | |
2599 | ||
d6fb7e9c | 2600 | if (tipc_sk_connected(sk)) |
0fc87aae | 2601 | return -EINVAL; |
07f6c4bc YX |
2602 | key = tsk->portid + tsk->pub_count + 1; |
2603 | if (key == tsk->portid) | |
0fc87aae JPM |
2604 | return -EADDRINUSE; |
2605 | ||
f2f9800d | 2606 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2607 | scope, tsk->portid, key); |
0fc87aae JPM |
2608 | if (unlikely(!publ)) |
2609 | return -EINVAL; | |
2610 | ||
301bae56 JPM |
2611 | list_add(&publ->pport_list, &tsk->publications); |
2612 | tsk->pub_count++; | |
2613 | tsk->published = 1; | |
0fc87aae JPM |
2614 | return 0; |
2615 | } | |
2616 | ||
301bae56 | 2617 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2618 | struct tipc_name_seq const *seq) |
2619 | { | |
f2f9800d | 2620 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2621 | struct publication *publ; |
2622 | struct publication *safe; | |
2623 | int rc = -EINVAL; | |
2624 | ||
301bae56 | 2625 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2626 | if (seq) { |
2627 | if (publ->scope != scope) | |
2628 | continue; | |
2629 | if (publ->type != seq->type) | |
2630 | continue; | |
2631 | if (publ->lower != seq->lower) | |
2632 | continue; | |
2633 | if (publ->upper != seq->upper) | |
2634 | break; | |
f2f9800d | 2635 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2636 | publ->ref, publ->key); |
2637 | rc = 0; | |
2638 | break; | |
2639 | } | |
f2f9800d | 2640 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2641 | publ->ref, publ->key); |
2642 | rc = 0; | |
2643 | } | |
301bae56 JPM |
2644 | if (list_empty(&tsk->publications)) |
2645 | tsk->published = 0; | |
0fc87aae JPM |
2646 | return rc; |
2647 | } | |
2648 | ||
5a9ee0be JPM |
2649 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2650 | * when we go from standalone to network mode. | |
2651 | */ | |
e05b31f4 | 2652 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2653 | { |
e05b31f4 | 2654 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2655 | struct rhashtable_iter iter; |
07f6c4bc | 2656 | struct tipc_sock *tsk; |
5a9ee0be | 2657 | struct tipc_msg *msg; |
5a9ee0be | 2658 | |
40f9f439 HX |
2659 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2660 | ||
2661 | do { | |
2662 | tsk = ERR_PTR(rhashtable_walk_start(&iter)); | |
6c7e983b BP |
2663 | if (IS_ERR(tsk)) |
2664 | goto walk_stop; | |
40f9f439 HX |
2665 | |
2666 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
7f8ec35d CW |
2667 | sock_hold(&tsk->sk); |
2668 | rhashtable_walk_stop(&iter); | |
2669 | lock_sock(&tsk->sk); | |
07f6c4bc | 2670 | msg = &tsk->phdr; |
34747539 YX |
2671 | msg_set_prevnode(msg, tn->own_addr); |
2672 | msg_set_orignode(msg, tn->own_addr); | |
7f8ec35d CW |
2673 | release_sock(&tsk->sk); |
2674 | rhashtable_walk_start(&iter); | |
2675 | sock_put(&tsk->sk); | |
07f6c4bc | 2676 | } |
6c7e983b | 2677 | walk_stop: |
40f9f439 HX |
2678 | rhashtable_walk_stop(&iter); |
2679 | } while (tsk == ERR_PTR(-EAGAIN)); | |
709cfaea CW |
2680 | |
2681 | rhashtable_walk_exit(&iter); | |
5a9ee0be JPM |
2682 | } |
2683 | ||
e05b31f4 | 2684 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2685 | { |
e05b31f4 | 2686 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2687 | struct tipc_sock *tsk; |
808d90f9 | 2688 | |
07f6c4bc | 2689 | rcu_read_lock(); |
6cca7289 | 2690 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2691 | if (tsk) |
2692 | sock_hold(&tsk->sk); | |
2693 | rcu_read_unlock(); | |
808d90f9 | 2694 | |
07f6c4bc | 2695 | return tsk; |
808d90f9 JPM |
2696 | } |
2697 | ||
07f6c4bc | 2698 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2699 | { |
e05b31f4 YX |
2700 | struct sock *sk = &tsk->sk; |
2701 | struct net *net = sock_net(sk); | |
2702 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2703 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2704 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2705 | |
07f6c4bc YX |
2706 | while (remaining--) { |
2707 | portid++; | |
2708 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2709 | portid = TIPC_MIN_PORT; | |
2710 | tsk->portid = portid; | |
2711 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2712 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2713 | tsk_rht_params)) | |
07f6c4bc YX |
2714 | return 0; |
2715 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2716 | } |
2717 | ||
07f6c4bc | 2718 | return -1; |
808d90f9 JPM |
2719 | } |
2720 | ||
07f6c4bc | 2721 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2722 | { |
07f6c4bc | 2723 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2724 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2725 | |
6cca7289 | 2726 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 2727 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 2728 | __sock_put(sk); |
808d90f9 | 2729 | } |
808d90f9 JPM |
2730 | } |
2731 | ||
6cca7289 HX |
2732 | static const struct rhashtable_params tsk_rht_params = { |
2733 | .nelem_hint = 192, | |
2734 | .head_offset = offsetof(struct tipc_sock, node), | |
2735 | .key_offset = offsetof(struct tipc_sock, portid), | |
2736 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2737 | .max_size = 1048576, |
2738 | .min_size = 256, | |
b5e2c150 | 2739 | .automatic_shrinking = true, |
6cca7289 HX |
2740 | }; |
2741 | ||
e05b31f4 | 2742 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2743 | { |
e05b31f4 | 2744 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2745 | |
2746 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2747 | } |
2748 | ||
e05b31f4 | 2749 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2750 | { |
e05b31f4 YX |
2751 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2752 | ||
07f6c4bc YX |
2753 | /* Wait for socket readers to complete */ |
2754 | synchronize_net(); | |
808d90f9 | 2755 | |
e05b31f4 | 2756 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2757 | } |
2758 | ||
75da2163 JM |
2759 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
2760 | { | |
2761 | struct net *net = sock_net(&tsk->sk); | |
2762 | u32 domain = addr_domain(net, mreq->scope); | |
2763 | struct tipc_group *grp = tsk->group; | |
2764 | struct tipc_msg *hdr = &tsk->phdr; | |
2765 | struct tipc_name_seq seq; | |
2766 | int rc; | |
2767 | ||
2768 | if (mreq->type < TIPC_RESERVED_TYPES) | |
2769 | return -EACCES; | |
2770 | if (grp) | |
2771 | return -EACCES; | |
2772 | grp = tipc_group_create(net, tsk->portid, mreq); | |
2773 | if (!grp) | |
2774 | return -ENOMEM; | |
2775 | tsk->group = grp; | |
2776 | msg_set_lookup_scope(hdr, mreq->scope); | |
2777 | msg_set_nametype(hdr, mreq->type); | |
2778 | msg_set_dest_droppable(hdr, true); | |
2779 | seq.type = mreq->type; | |
2780 | seq.lower = mreq->instance; | |
2781 | seq.upper = seq.lower; | |
2782 | tipc_nametbl_build_group(net, grp, mreq->type, domain); | |
2783 | rc = tipc_sk_publish(tsk, mreq->scope, &seq); | |
e233df01 | 2784 | if (rc) { |
75da2163 | 2785 | tipc_group_delete(net, grp); |
e233df01 CW |
2786 | tsk->group = NULL; |
2787 | } | |
399574d4 JM |
2788 | |
2789 | /* Eliminate any risk that a broadcast overtakes the sent JOIN */ | |
2790 | tsk->mc_method.rcast = true; | |
2791 | tsk->mc_method.mandatory = true; | |
75da2163 JM |
2792 | return rc; |
2793 | } | |
2794 | ||
2795 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
2796 | { | |
2797 | struct net *net = sock_net(&tsk->sk); | |
2798 | struct tipc_group *grp = tsk->group; | |
2799 | struct tipc_name_seq seq; | |
2800 | int scope; | |
2801 | ||
2802 | if (!grp) | |
2803 | return -EINVAL; | |
2804 | tipc_group_self(grp, &seq, &scope); | |
2805 | tipc_group_delete(net, grp); | |
2806 | tsk->group = NULL; | |
2807 | tipc_sk_withdraw(tsk, scope, &seq); | |
2808 | return 0; | |
2809 | } | |
2810 | ||
b97bf3fd | 2811 | /** |
247f0f3c | 2812 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2813 | * @sock: socket structure |
2814 | * @lvl: option level | |
2815 | * @opt: option identifier | |
2816 | * @ov: pointer to new option value | |
2817 | * @ol: length of option value | |
c4307285 YH |
2818 | * |
2819 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2820 | * (to ease compatibility). |
c4307285 | 2821 | * |
b97bf3fd PL |
2822 | * Returns 0 on success, errno otherwise |
2823 | */ | |
247f0f3c YX |
2824 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2825 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2826 | { |
0c3141e9 | 2827 | struct sock *sk = sock->sk; |
58ed9442 | 2828 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2829 | struct tipc_group_req mreq; |
01fd12bb | 2830 | u32 value = 0; |
a08ef476 | 2831 | int res = 0; |
b97bf3fd | 2832 | |
c4307285 YH |
2833 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2834 | return 0; | |
b97bf3fd PL |
2835 | if (lvl != SOL_TIPC) |
2836 | return -ENOPROTOOPT; | |
01fd12bb JPM |
2837 | |
2838 | switch (opt) { | |
2839 | case TIPC_IMPORTANCE: | |
2840 | case TIPC_SRC_DROPPABLE: | |
2841 | case TIPC_DEST_DROPPABLE: | |
2842 | case TIPC_CONN_TIMEOUT: | |
2843 | if (ol < sizeof(value)) | |
2844 | return -EINVAL; | |
75da2163 JM |
2845 | if (get_user(value, (u32 __user *)ov)) |
2846 | return -EFAULT; | |
2847 | break; | |
2848 | case TIPC_GROUP_JOIN: | |
2849 | if (ol < sizeof(mreq)) | |
2850 | return -EINVAL; | |
2851 | if (copy_from_user(&mreq, ov, sizeof(mreq))) | |
2852 | return -EFAULT; | |
01fd12bb JPM |
2853 | break; |
2854 | default: | |
2855 | if (ov || ol) | |
2856 | return -EINVAL; | |
2857 | } | |
b97bf3fd | 2858 | |
0c3141e9 | 2859 | lock_sock(sk); |
c4307285 | 2860 | |
b97bf3fd PL |
2861 | switch (opt) { |
2862 | case TIPC_IMPORTANCE: | |
301bae56 | 2863 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2864 | break; |
2865 | case TIPC_SRC_DROPPABLE: | |
2866 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2867 | tsk_set_unreliable(tsk, value); |
c4307285 | 2868 | else |
b97bf3fd PL |
2869 | res = -ENOPROTOOPT; |
2870 | break; | |
2871 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2872 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2873 | break; |
2874 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2875 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 2876 | break; |
01fd12bb JPM |
2877 | case TIPC_MCAST_BROADCAST: |
2878 | tsk->mc_method.rcast = false; | |
2879 | tsk->mc_method.mandatory = true; | |
2880 | break; | |
2881 | case TIPC_MCAST_REPLICAST: | |
2882 | tsk->mc_method.rcast = true; | |
2883 | tsk->mc_method.mandatory = true; | |
2884 | break; | |
75da2163 JM |
2885 | case TIPC_GROUP_JOIN: |
2886 | res = tipc_sk_join(tsk, &mreq); | |
2887 | break; | |
2888 | case TIPC_GROUP_LEAVE: | |
2889 | res = tipc_sk_leave(tsk); | |
2890 | break; | |
b97bf3fd PL |
2891 | default: |
2892 | res = -EINVAL; | |
2893 | } | |
2894 | ||
0c3141e9 AS |
2895 | release_sock(sk); |
2896 | ||
b97bf3fd PL |
2897 | return res; |
2898 | } | |
2899 | ||
2900 | /** | |
247f0f3c | 2901 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2902 | * @sock: socket structure |
2903 | * @lvl: option level | |
2904 | * @opt: option identifier | |
2905 | * @ov: receptacle for option value | |
2906 | * @ol: receptacle for length of option value | |
c4307285 YH |
2907 | * |
2908 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2909 | * (to ease compatibility). |
c4307285 | 2910 | * |
b97bf3fd PL |
2911 | * Returns 0 on success, errno otherwise |
2912 | */ | |
247f0f3c YX |
2913 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2914 | char __user *ov, int __user *ol) | |
b97bf3fd | 2915 | { |
0c3141e9 | 2916 | struct sock *sk = sock->sk; |
58ed9442 | 2917 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 JM |
2918 | struct tipc_name_seq seq; |
2919 | int len, scope; | |
b97bf3fd | 2920 | u32 value; |
c4307285 | 2921 | int res; |
b97bf3fd | 2922 | |
c4307285 YH |
2923 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2924 | return put_user(0, ol); | |
b97bf3fd PL |
2925 | if (lvl != SOL_TIPC) |
2926 | return -ENOPROTOOPT; | |
2db9983a AS |
2927 | res = get_user(len, ol); |
2928 | if (res) | |
c4307285 | 2929 | return res; |
b97bf3fd | 2930 | |
0c3141e9 | 2931 | lock_sock(sk); |
b97bf3fd PL |
2932 | |
2933 | switch (opt) { | |
2934 | case TIPC_IMPORTANCE: | |
301bae56 | 2935 | value = tsk_importance(tsk); |
b97bf3fd PL |
2936 | break; |
2937 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2938 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2939 | break; |
2940 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2941 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2942 | break; |
2943 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2944 | value = tsk->conn_timeout; |
0c3141e9 | 2945 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2946 | break; |
0e65967e | 2947 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2948 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2949 | break; |
0e65967e | 2950 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2951 | value = skb_queue_len(&sk->sk_receive_queue); |
2952 | break; | |
75da2163 JM |
2953 | case TIPC_GROUP_JOIN: |
2954 | seq.type = 0; | |
2955 | if (tsk->group) | |
2956 | tipc_group_self(tsk->group, &seq, &scope); | |
2957 | value = seq.type; | |
2958 | break; | |
b97bf3fd PL |
2959 | default: |
2960 | res = -EINVAL; | |
2961 | } | |
2962 | ||
0c3141e9 AS |
2963 | release_sock(sk); |
2964 | ||
25860c3b PG |
2965 | if (res) |
2966 | return res; /* "get" failed */ | |
b97bf3fd | 2967 | |
25860c3b PG |
2968 | if (len < sizeof(value)) |
2969 | return -EINVAL; | |
2970 | ||
2971 | if (copy_to_user(ov, &value, sizeof(value))) | |
2972 | return -EFAULT; | |
2973 | ||
2974 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2975 | } |
2976 | ||
f2f9800d | 2977 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2978 | { |
f2f9800d | 2979 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2980 | struct tipc_sioc_ln_req lnr; |
2981 | void __user *argp = (void __user *)arg; | |
2982 | ||
2983 | switch (cmd) { | |
2984 | case SIOCGETLINKNAME: | |
2985 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2986 | return -EFAULT; | |
f2f9800d YX |
2987 | if (!tipc_node_get_linkname(sock_net(sk), |
2988 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2989 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2990 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2991 | return -EFAULT; | |
2992 | return 0; | |
2993 | } | |
2994 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2995 | default: |
2996 | return -ENOIOCTLCMD; | |
2997 | } | |
2998 | } | |
2999 | ||
70b03759 EH |
3000 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
3001 | { | |
3002 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
3003 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
3004 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
3005 | ||
3006 | tsk1->peer.family = AF_TIPC; | |
3007 | tsk1->peer.addrtype = TIPC_ADDR_ID; | |
3008 | tsk1->peer.scope = TIPC_NODE_SCOPE; | |
3009 | tsk1->peer.addr.id.ref = tsk2->portid; | |
3010 | tsk1->peer.addr.id.node = onode; | |
3011 | tsk2->peer.family = AF_TIPC; | |
3012 | tsk2->peer.addrtype = TIPC_ADDR_ID; | |
3013 | tsk2->peer.scope = TIPC_NODE_SCOPE; | |
3014 | tsk2->peer.addr.id.ref = tsk1->portid; | |
3015 | tsk2->peer.addr.id.node = onode; | |
3016 | ||
3017 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
3018 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
3019 | return 0; |
3020 | } | |
3021 | ||
ae86b9e3 BH |
3022 | /* Protocol switches for the various types of TIPC sockets */ |
3023 | ||
bca65eae | 3024 | static const struct proto_ops msg_ops = { |
0e65967e | 3025 | .owner = THIS_MODULE, |
b97bf3fd | 3026 | .family = AF_TIPC, |
247f0f3c YX |
3027 | .release = tipc_release, |
3028 | .bind = tipc_bind, | |
3029 | .connect = tipc_connect, | |
66bc1e8d | 3030 | .socketpair = tipc_socketpair, |
245f3d34 | 3031 | .accept = sock_no_accept, |
247f0f3c YX |
3032 | .getname = tipc_getname, |
3033 | .poll = tipc_poll, | |
78acb1f9 | 3034 | .ioctl = tipc_ioctl, |
245f3d34 | 3035 | .listen = sock_no_listen, |
247f0f3c YX |
3036 | .shutdown = tipc_shutdown, |
3037 | .setsockopt = tipc_setsockopt, | |
3038 | .getsockopt = tipc_getsockopt, | |
3039 | .sendmsg = tipc_sendmsg, | |
3040 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3041 | .mmap = sock_no_mmap, |
3042 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3043 | }; |
3044 | ||
bca65eae | 3045 | static const struct proto_ops packet_ops = { |
0e65967e | 3046 | .owner = THIS_MODULE, |
b97bf3fd | 3047 | .family = AF_TIPC, |
247f0f3c YX |
3048 | .release = tipc_release, |
3049 | .bind = tipc_bind, | |
3050 | .connect = tipc_connect, | |
70b03759 | 3051 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3052 | .accept = tipc_accept, |
3053 | .getname = tipc_getname, | |
3054 | .poll = tipc_poll, | |
78acb1f9 | 3055 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3056 | .listen = tipc_listen, |
3057 | .shutdown = tipc_shutdown, | |
3058 | .setsockopt = tipc_setsockopt, | |
3059 | .getsockopt = tipc_getsockopt, | |
3060 | .sendmsg = tipc_send_packet, | |
3061 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3062 | .mmap = sock_no_mmap, |
3063 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3064 | }; |
3065 | ||
bca65eae | 3066 | static const struct proto_ops stream_ops = { |
0e65967e | 3067 | .owner = THIS_MODULE, |
b97bf3fd | 3068 | .family = AF_TIPC, |
247f0f3c YX |
3069 | .release = tipc_release, |
3070 | .bind = tipc_bind, | |
3071 | .connect = tipc_connect, | |
70b03759 | 3072 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3073 | .accept = tipc_accept, |
3074 | .getname = tipc_getname, | |
3075 | .poll = tipc_poll, | |
78acb1f9 | 3076 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3077 | .listen = tipc_listen, |
3078 | .shutdown = tipc_shutdown, | |
3079 | .setsockopt = tipc_setsockopt, | |
3080 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3081 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3082 | .recvmsg = tipc_recvstream, |
8238745a YH |
3083 | .mmap = sock_no_mmap, |
3084 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3085 | }; |
3086 | ||
bca65eae | 3087 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3088 | .owner = THIS_MODULE, |
b97bf3fd | 3089 | .family = AF_TIPC, |
c5fa7b3c | 3090 | .create = tipc_sk_create |
b97bf3fd PL |
3091 | }; |
3092 | ||
3093 | static struct proto tipc_proto = { | |
3094 | .name = "TIPC", | |
3095 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3096 | .obj_size = sizeof(struct tipc_sock), |
3097 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3098 | }; |
3099 | ||
3100 | /** | |
4323add6 | 3101 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3102 | * |
b97bf3fd PL |
3103 | * Returns 0 on success, errno otherwise |
3104 | */ | |
4323add6 | 3105 | int tipc_socket_init(void) |
b97bf3fd PL |
3106 | { |
3107 | int res; | |
3108 | ||
c4307285 | 3109 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3110 | if (res) { |
2cf8aa19 | 3111 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3112 | goto out; |
3113 | } | |
3114 | ||
3115 | res = sock_register(&tipc_family_ops); | |
3116 | if (res) { | |
2cf8aa19 | 3117 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3118 | proto_unregister(&tipc_proto); |
3119 | goto out; | |
3120 | } | |
b97bf3fd PL |
3121 | out: |
3122 | return res; | |
3123 | } | |
3124 | ||
3125 | /** | |
4323add6 | 3126 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3127 | */ |
4323add6 | 3128 | void tipc_socket_stop(void) |
b97bf3fd | 3129 | { |
b97bf3fd PL |
3130 | sock_unregister(tipc_family_ops.family); |
3131 | proto_unregister(&tipc_proto); | |
3132 | } | |
34b78a12 RA |
3133 | |
3134 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3135 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
3136 | { |
3137 | u32 peer_node; | |
3138 | u32 peer_port; | |
3139 | struct nlattr *nest; | |
3140 | ||
3141 | peer_node = tsk_peer_node(tsk); | |
3142 | peer_port = tsk_peer_port(tsk); | |
3143 | ||
3144 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
3145 | ||
3146 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3147 | goto msg_full; | |
3148 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3149 | goto msg_full; | |
3150 | ||
3151 | if (tsk->conn_type != 0) { | |
3152 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
3153 | goto msg_full; | |
3154 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
3155 | goto msg_full; | |
3156 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
3157 | goto msg_full; | |
3158 | } | |
3159 | nla_nest_end(skb, nest); | |
3160 | ||
3161 | return 0; | |
3162 | ||
3163 | msg_full: | |
3164 | nla_nest_cancel(skb, nest); | |
3165 | ||
3166 | return -EMSGSIZE; | |
3167 | } | |
3168 | ||
3169 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3170 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3171 | struct tipc_sock *tsk) | |
34b78a12 RA |
3172 | { |
3173 | int err; | |
3174 | void *hdr; | |
3175 | struct nlattr *attrs; | |
34747539 YX |
3176 | struct net *net = sock_net(skb->sk); |
3177 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 3178 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
3179 | |
3180 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3181 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3182 | if (!hdr) |
3183 | goto msg_cancel; | |
3184 | ||
3185 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
3186 | if (!attrs) | |
3187 | goto genlmsg_cancel; | |
07f6c4bc | 3188 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 3189 | goto attr_msg_cancel; |
34747539 | 3190 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
3191 | goto attr_msg_cancel; |
3192 | ||
d6fb7e9c | 3193 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
3194 | err = __tipc_nl_add_sk_con(skb, tsk); |
3195 | if (err) | |
3196 | goto attr_msg_cancel; | |
3197 | } else if (!list_empty(&tsk->publications)) { | |
3198 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3199 | goto attr_msg_cancel; | |
3200 | } | |
3201 | nla_nest_end(skb, attrs); | |
3202 | genlmsg_end(skb, hdr); | |
3203 | ||
3204 | return 0; | |
3205 | ||
3206 | attr_msg_cancel: | |
3207 | nla_nest_cancel(skb, attrs); | |
3208 | genlmsg_cancel: | |
3209 | genlmsg_cancel(skb, hdr); | |
3210 | msg_cancel: | |
3211 | return -EMSGSIZE; | |
3212 | } | |
3213 | ||
f908005c CW |
3214 | int tipc_dump_start(struct netlink_callback *cb) |
3215 | { | |
fc5e4fad CW |
3216 | return __tipc_dump_start(cb, sock_net(cb->skb->sk)); |
3217 | } | |
3218 | EXPORT_SYMBOL(tipc_dump_start); | |
3219 | ||
3220 | int __tipc_dump_start(struct netlink_callback *cb, struct net *net) | |
3221 | { | |
3222 | /* tipc_nl_name_table_dump() uses cb->args[0...3]. */ | |
3223 | struct rhashtable_iter *iter = (void *)cb->args[4]; | |
f908005c CW |
3224 | struct tipc_net *tn = tipc_net(net); |
3225 | ||
3226 | if (!iter) { | |
3227 | iter = kmalloc(sizeof(*iter), GFP_KERNEL); | |
3228 | if (!iter) | |
3229 | return -ENOMEM; | |
3230 | ||
fc5e4fad | 3231 | cb->args[4] = (long)iter; |
f908005c CW |
3232 | } |
3233 | ||
3234 | rhashtable_walk_enter(&tn->sk_rht, iter); | |
3235 | return 0; | |
3236 | } | |
f908005c CW |
3237 | |
3238 | int tipc_dump_done(struct netlink_callback *cb) | |
3239 | { | |
fc5e4fad | 3240 | struct rhashtable_iter *hti = (void *)cb->args[4]; |
f908005c CW |
3241 | |
3242 | rhashtable_walk_exit(hti); | |
3243 | kfree(hti); | |
3244 | return 0; | |
3245 | } | |
3246 | EXPORT_SYMBOL(tipc_dump_done); | |
3247 | ||
34b78a12 RA |
3248 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
3249 | { | |
3250 | int err; | |
3251 | struct tipc_sock *tsk; | |
07f6c4bc YX |
3252 | const struct bucket_table *tbl; |
3253 | struct rhash_head *pos; | |
e05b31f4 YX |
3254 | struct net *net = sock_net(skb->sk); |
3255 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
3256 | u32 tbl_id = cb->args[0]; |
3257 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 3258 | |
07f6c4bc | 3259 | rcu_read_lock(); |
e05b31f4 | 3260 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
3261 | for (; tbl_id < tbl->size; tbl_id++) { |
3262 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 3263 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
3264 | if (prev_portid && prev_portid != tsk->portid) { |
3265 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3266 | continue; | |
3267 | } | |
3268 | ||
07f6c4bc | 3269 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
3270 | if (err) { |
3271 | prev_portid = tsk->portid; | |
3272 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3273 | goto out; | |
3274 | } | |
3275 | prev_portid = 0; | |
07f6c4bc | 3276 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 3277 | } |
34b78a12 | 3278 | } |
d6e164e3 | 3279 | out: |
07f6c4bc | 3280 | rcu_read_unlock(); |
d6e164e3 RA |
3281 | cb->args[0] = tbl_id; |
3282 | cb->args[1] = prev_portid; | |
34b78a12 RA |
3283 | |
3284 | return skb->len; | |
3285 | } | |
1a1a143d RA |
3286 | |
3287 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3288 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3289 | struct netlink_callback *cb, | |
3290 | struct publication *publ) | |
1a1a143d RA |
3291 | { |
3292 | void *hdr; | |
3293 | struct nlattr *attrs; | |
3294 | ||
3295 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3296 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3297 | if (!hdr) |
3298 | goto msg_cancel; | |
3299 | ||
3300 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
3301 | if (!attrs) | |
3302 | goto genlmsg_cancel; | |
3303 | ||
3304 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3305 | goto attr_msg_cancel; | |
3306 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
3307 | goto attr_msg_cancel; | |
3308 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
3309 | goto attr_msg_cancel; | |
3310 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
3311 | goto attr_msg_cancel; | |
3312 | ||
3313 | nla_nest_end(skb, attrs); | |
3314 | genlmsg_end(skb, hdr); | |
3315 | ||
3316 | return 0; | |
3317 | ||
3318 | attr_msg_cancel: | |
3319 | nla_nest_cancel(skb, attrs); | |
3320 | genlmsg_cancel: | |
3321 | genlmsg_cancel(skb, hdr); | |
3322 | msg_cancel: | |
3323 | return -EMSGSIZE; | |
3324 | } | |
3325 | ||
3326 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3327 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3328 | struct netlink_callback *cb, | |
3329 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3330 | { |
3331 | int err; | |
3332 | struct publication *p; | |
3333 | ||
3334 | if (*last_publ) { | |
3335 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
3336 | if (p->key == *last_publ) | |
3337 | break; | |
3338 | } | |
3339 | if (p->key != *last_publ) { | |
3340 | /* We never set seq or call nl_dump_check_consistent() | |
3341 | * this means that setting prev_seq here will cause the | |
3342 | * consistence check to fail in the netlink callback | |
3343 | * handler. Resulting in the last NLMSG_DONE message | |
3344 | * having the NLM_F_DUMP_INTR flag set. | |
3345 | */ | |
3346 | cb->prev_seq = 1; | |
3347 | *last_publ = 0; | |
3348 | return -EPIPE; | |
3349 | } | |
3350 | } else { | |
3351 | p = list_first_entry(&tsk->publications, struct publication, | |
3352 | pport_list); | |
3353 | } | |
3354 | ||
3355 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
3356 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
3357 | if (err) { | |
3358 | *last_publ = p->key; | |
3359 | return err; | |
3360 | } | |
3361 | } | |
3362 | *last_publ = 0; | |
3363 | ||
3364 | return 0; | |
3365 | } | |
3366 | ||
3367 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3368 | { | |
3369 | int err; | |
07f6c4bc | 3370 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3371 | u32 last_publ = cb->args[1]; |
3372 | u32 done = cb->args[2]; | |
e05b31f4 | 3373 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3374 | struct tipc_sock *tsk; |
3375 | ||
07f6c4bc | 3376 | if (!tsk_portid) { |
1a1a143d RA |
3377 | struct nlattr **attrs; |
3378 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
3379 | ||
3380 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
3381 | if (err) | |
3382 | return err; | |
3383 | ||
45e093ae RA |
3384 | if (!attrs[TIPC_NLA_SOCK]) |
3385 | return -EINVAL; | |
3386 | ||
1a1a143d RA |
3387 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
3388 | attrs[TIPC_NLA_SOCK], | |
fceb6435 | 3389 | tipc_nl_sock_policy, NULL); |
1a1a143d RA |
3390 | if (err) |
3391 | return err; | |
3392 | ||
3393 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3394 | return -EINVAL; | |
3395 | ||
07f6c4bc | 3396 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3397 | } |
3398 | ||
3399 | if (done) | |
3400 | return 0; | |
3401 | ||
e05b31f4 | 3402 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3403 | if (!tsk) |
3404 | return -EINVAL; | |
3405 | ||
3406 | lock_sock(&tsk->sk); | |
3407 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3408 | if (!err) | |
3409 | done = 1; | |
3410 | release_sock(&tsk->sk); | |
07f6c4bc | 3411 | sock_put(&tsk->sk); |
1a1a143d | 3412 | |
07f6c4bc | 3413 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3414 | cb->args[1] = last_publ; |
3415 | cb->args[2] = done; | |
3416 | ||
3417 | return skb->len; | |
3418 | } |