Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
60c102ee | 4 | * Copyright (c) 2001-2007, 2012-2019, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
998d3907 | 6 | * Copyright (c) 2020-2021, Red Hat Inc |
b97bf3fd PL |
7 | * All rights reserved. |
8 | * | |
9ea1fd3c | 9 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
10 | * modification, are permitted provided that the following conditions are met: |
11 | * | |
9ea1fd3c PL |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the names of the copyright holders nor the names of its | |
18 | * contributors may be used to endorse or promote products derived from | |
19 | * this software without specific prior written permission. | |
b97bf3fd | 20 | * |
9ea1fd3c PL |
21 | * Alternatively, this software may be distributed under the terms of the |
22 | * GNU General Public License ("GPL") version 2 as published by the Free | |
23 | * Software Foundation. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | |
37 | ||
07f6c4bc | 38 | #include <linux/rhashtable.h> |
174cd4b1 | 39 | #include <linux/sched/signal.h> |
40e0b090 | 40 | #include <trace/events/sock.h> |
174cd4b1 | 41 | |
b97bf3fd | 42 | #include "core.h" |
e2dafe87 | 43 | #include "name_table.h" |
78acb1f9 | 44 | #include "node.h" |
e2dafe87 | 45 | #include "link.h" |
c637c103 | 46 | #include "name_distr.h" |
2e84c60b | 47 | #include "socket.h" |
a6bf70f7 | 48 | #include "bcast.h" |
49cc66ea | 49 | #include "netlink.h" |
75da2163 | 50 | #include "group.h" |
b4b9771b | 51 | #include "trace.h" |
2cf8aa19 | 52 | |
0a3e060f TL |
53 | #define NAGLE_START_INIT 4 |
54 | #define NAGLE_START_MAX 1024 | |
67879274 | 55 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
0d5fcebf | 56 | #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
57 | #define TIPC_MAX_PORT 0xffffffff |
58 | #define TIPC_MIN_PORT 1 | |
60462191 | 59 | #define TIPC_ACK_RATE 4 /* ACK at 1/4 of rcv window size */ |
301bae56 | 60 | |
0c288c86 PB |
61 | enum { |
62 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 63 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 64 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 65 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 66 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
67 | }; |
68 | ||
31c82a2d JM |
69 | struct sockaddr_pair { |
70 | struct sockaddr_tipc sock; | |
71 | struct sockaddr_tipc member; | |
72 | }; | |
73 | ||
301bae56 JPM |
74 | /** |
75 | * struct tipc_sock - TIPC socket structure | |
76 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 | 77 | * @max_pkt: maximum packet size "hint" used when building messages sent by port |
c0bceb97 | 78 | * @maxnagle: maximum size of msg which can be subject to nagle |
07f6c4bc | 79 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 80 | * @phdr: preformatted message header used when sending messages |
f172f4b8 | 81 | * @cong_links: list of congested links |
301bae56 | 82 | * @publications: list of publications for port |
365ad353 | 83 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 | 84 | * @pub_count: total # of publications port has made during its lifetime |
301bae56 | 85 | * @conn_timeout: the time we can wait for an unresponded setup request |
f172f4b8 | 86 | * @probe_unacked: probe has not received ack yet |
301bae56 | 87 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue |
365ad353 | 88 | * @cong_link_cnt: number of congested links |
75da2163 | 89 | * @snt_unacked: # messages sent by socket, and not yet acked by peer |
f172f4b8 RD |
90 | * @snd_win: send window size |
91 | * @peer_caps: peer capabilities mask | |
301bae56 | 92 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
f172f4b8 | 93 | * @rcv_win: receive window size |
aeda16b6 | 94 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 95 | * @node: hash table node |
01fd12bb | 96 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 97 | * @rcu: rcu struct for tipc_sock |
f172f4b8 RD |
98 | * @group: TIPC communications group |
99 | * @oneway: message count in one direction (FIXME) | |
100 | * @nagle_start: current nagle value | |
101 | * @snd_backlog: send backlog count | |
102 | * @msg_acc: messages accepted; used in managing backlog and nagle | |
103 | * @pkt_cnt: TIPC socket packet count | |
104 | * @expect_ack: whether this TIPC socket is expecting an ack | |
105 | * @nodelay: setsockopt() TIPC_NODELAY setting | |
106 | * @group_is_open: TIPC socket group is fully open (FIXME) | |
14623e00 JM |
107 | * @published: true if port has one or more associated names |
108 | * @conn_addrtype: address type used when establishing connection | |
301bae56 JPM |
109 | */ |
110 | struct tipc_sock { | |
111 | struct sock sk; | |
301bae56 | 112 | u32 max_pkt; |
c0bceb97 | 113 | u32 maxnagle; |
07f6c4bc | 114 | u32 portid; |
301bae56 | 115 | struct tipc_msg phdr; |
365ad353 | 116 | struct list_head cong_links; |
301bae56 JPM |
117 | struct list_head publications; |
118 | u32 pub_count; | |
301bae56 | 119 | atomic_t dupl_rcvcnt; |
67879274 | 120 | u16 conn_timeout; |
8ea642ee | 121 | bool probe_unacked; |
365ad353 | 122 | u16 cong_link_cnt; |
10724cc7 JPM |
123 | u16 snt_unacked; |
124 | u16 snd_win; | |
60020e18 | 125 | u16 peer_caps; |
10724cc7 JPM |
126 | u16 rcv_unacked; |
127 | u16 rcv_win; | |
aeda16b6 | 128 | struct sockaddr_tipc peer; |
07f6c4bc | 129 | struct rhash_head node; |
01fd12bb | 130 | struct tipc_mc_method mc_method; |
07f6c4bc | 131 | struct rcu_head rcu; |
75da2163 | 132 | struct tipc_group *group; |
c0bceb97 | 133 | u32 oneway; |
0a3e060f | 134 | u32 nagle_start; |
c0bceb97 | 135 | u16 snd_backlog; |
0a3e060f TL |
136 | u16 msg_acc; |
137 | u16 pkt_cnt; | |
c0bceb97 JM |
138 | bool expect_ack; |
139 | bool nodelay; | |
60c25306 | 140 | bool group_is_open; |
50a3499a | 141 | bool published; |
14623e00 | 142 | u8 conn_addrtype; |
301bae56 | 143 | }; |
b97bf3fd | 144 | |
64ac5f59 | 145 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 146 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 147 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 148 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c | 149 | static int tipc_release(struct socket *sock); |
cdfbabfb DH |
150 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
151 | bool kern); | |
31b102bb | 152 | static void tipc_sk_timeout(struct timer_list *t); |
50a3499a | 153 | static int tipc_sk_publish(struct tipc_sock *tsk, struct tipc_uaddr *ua); |
2c98da07 | 154 | static int tipc_sk_withdraw(struct tipc_sock *tsk, struct tipc_uaddr *ua); |
75da2163 | 155 | static int tipc_sk_leave(struct tipc_sock *tsk); |
e05b31f4 | 156 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
157 | static int tipc_sk_insert(struct tipc_sock *tsk); |
158 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 159 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 160 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
0a3e060f | 161 | static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack); |
f8dd60de | 162 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p); |
b97bf3fd | 163 | |
bca65eae FW |
164 | static const struct proto_ops packet_ops; |
165 | static const struct proto_ops stream_ops; | |
166 | static const struct proto_ops msg_ops; | |
b97bf3fd | 167 | static struct proto tipc_proto; |
6cca7289 HX |
168 | static const struct rhashtable_params tsk_rht_params; |
169 | ||
c5898636 JPM |
170 | static u32 tsk_own_node(struct tipc_sock *tsk) |
171 | { | |
172 | return msg_prevnode(&tsk->phdr); | |
173 | } | |
174 | ||
301bae56 | 175 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 176 | { |
301bae56 | 177 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
178 | } |
179 | ||
301bae56 | 180 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 181 | { |
301bae56 | 182 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
183 | } |
184 | ||
301bae56 | 185 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 186 | { |
301bae56 | 187 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
188 | } |
189 | ||
301bae56 | 190 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 191 | { |
301bae56 | 192 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
193 | } |
194 | ||
301bae56 | 195 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 196 | { |
301bae56 | 197 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
198 | } |
199 | ||
301bae56 | 200 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 201 | { |
301bae56 | 202 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
203 | } |
204 | ||
301bae56 | 205 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 206 | { |
301bae56 | 207 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
208 | } |
209 | ||
095ae612 | 210 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
2e84c60b | 211 | { |
095ae612 | 212 | return container_of(sk, struct tipc_sock, sk); |
2e84c60b | 213 | } |
8826cde6 | 214 | |
095ae612 | 215 | int tsk_set_importance(struct sock *sk, int imp) |
301bae56 | 216 | { |
095ae612 CH |
217 | if (imp > TIPC_CRITICAL_IMPORTANCE) |
218 | return -EINVAL; | |
219 | msg_set_importance(&tipc_sk(sk)->phdr, (u32)imp); | |
220 | return 0; | |
301bae56 JPM |
221 | } |
222 | ||
10724cc7 | 223 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 224 | { |
6998cc6e | 225 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
226 | } |
227 | ||
b7d42635 JM |
228 | static u16 tsk_blocks(int len) |
229 | { | |
230 | return ((len / FLOWCTL_BLK_SZ) + 1); | |
231 | } | |
232 | ||
10724cc7 JPM |
233 | /* tsk_blocks(): translate a buffer size in bytes to number of |
234 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
235 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
236 | */ | |
237 | static u16 tsk_adv_blocks(int len) | |
238 | { | |
239 | return len / FLOWCTL_BLK_SZ / 4; | |
240 | } | |
241 | ||
242 | /* tsk_inc(): increment counter for sent or received data | |
243 | * - If block based flow control is not supported by peer we | |
244 | * fall back to message based ditto, incrementing the counter | |
245 | */ | |
246 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
247 | { | |
248 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
249 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
250 | return 1; | |
301bae56 JPM |
251 | } |
252 | ||
c0bceb97 JM |
253 | /* tsk_set_nagle - enable/disable nagle property by manipulating maxnagle |
254 | */ | |
255 | static void tsk_set_nagle(struct tipc_sock *tsk) | |
256 | { | |
257 | struct sock *sk = &tsk->sk; | |
258 | ||
259 | tsk->maxnagle = 0; | |
260 | if (sk->sk_type != SOCK_STREAM) | |
261 | return; | |
262 | if (tsk->nodelay) | |
263 | return; | |
264 | if (!(tsk->peer_caps & TIPC_NAGLE)) | |
265 | return; | |
266 | /* Limit node local buffer size to avoid receive queue overflow */ | |
267 | if (tsk->max_pkt == MAX_MSG_SIZE) | |
268 | tsk->maxnagle = 1500; | |
269 | else | |
270 | tsk->maxnagle = tsk->max_pkt; | |
271 | } | |
272 | ||
0c3141e9 | 273 | /** |
2e84c60b | 274 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
f172f4b8 | 275 | * @sk: network socket |
0c3141e9 AS |
276 | * |
277 | * Caller must hold socket lock | |
b97bf3fd | 278 | */ |
2e84c60b | 279 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 280 | { |
01e661eb | 281 | trace_tipc_sk_advance_rx(sk, NULL, TIPC_DUMP_SK_RCVQ, " "); |
5f6d9123 | 282 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
283 | } |
284 | ||
bcd3ffd4 JPM |
285 | /* tipc_sk_respond() : send response message back to sender |
286 | */ | |
287 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
288 | { | |
289 | u32 selector; | |
290 | u32 dnode; | |
291 | u32 onode = tipc_own_addr(sock_net(sk)); | |
292 | ||
293 | if (!tipc_msg_reverse(onode, &skb, err)) | |
294 | return; | |
295 | ||
01e661eb | 296 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, "@sk_respond!"); |
bcd3ffd4 JPM |
297 | dnode = msg_destnode(buf_msg(skb)); |
298 | selector = msg_origport(buf_msg(skb)); | |
299 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
300 | } | |
301 | ||
b97bf3fd | 302 | /** |
2e84c60b | 303 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
f172f4b8 RD |
304 | * @sk: network socket |
305 | * @error: response error code | |
0c3141e9 AS |
306 | * |
307 | * Caller must hold socket lock | |
b97bf3fd | 308 | */ |
49afb806 | 309 | static void tsk_rej_rx_queue(struct sock *sk, int error) |
b97bf3fd | 310 | { |
a6ca1094 | 311 | struct sk_buff *skb; |
0c3141e9 | 312 | |
bcd3ffd4 | 313 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
49afb806 | 314 | tipc_sk_respond(sk, skb, error); |
b97bf3fd PL |
315 | } |
316 | ||
d6fb7e9c PB |
317 | static bool tipc_sk_connected(struct sock *sk) |
318 | { | |
f40acbaf | 319 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
320 | } |
321 | ||
c752023a PB |
322 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
323 | * @sk: socket | |
324 | * | |
325 | * Returns true if connection less, false otherwise | |
326 | */ | |
327 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
328 | { | |
329 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
330 | } | |
331 | ||
2e84c60b | 332 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
333 | * |
334 | * Handles cases where the node's network address has changed from | |
335 | * the default of <0.0.0> to its configured setting. | |
336 | */ | |
2e84c60b | 337 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 338 | { |
d6fb7e9c | 339 | struct sock *sk = &tsk->sk; |
23fd3eac | 340 | u32 self = tipc_own_addr(sock_net(sk)); |
301bae56 | 341 | u32 peer_port = tsk_peer_port(tsk); |
23fd3eac | 342 | u32 orig_node, peer_node; |
0fc87aae | 343 | |
d6fb7e9c | 344 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
345 | return false; |
346 | ||
347 | if (unlikely(msg_origport(msg) != peer_port)) | |
348 | return false; | |
349 | ||
350 | orig_node = msg_orignode(msg); | |
301bae56 | 351 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
352 | |
353 | if (likely(orig_node == peer_node)) | |
354 | return true; | |
355 | ||
23fd3eac | 356 | if (!orig_node && peer_node == self) |
0fc87aae JPM |
357 | return true; |
358 | ||
23fd3eac | 359 | if (!peer_node && orig_node == self) |
0fc87aae JPM |
360 | return true; |
361 | ||
362 | return false; | |
363 | } | |
364 | ||
0c288c86 PB |
365 | /* tipc_set_sk_state - set the sk_state of the socket |
366 | * @sk: socket | |
367 | * | |
368 | * Caller must hold socket lock | |
369 | * | |
370 | * Returns 0 on success, errno otherwise | |
371 | */ | |
372 | static int tipc_set_sk_state(struct sock *sk, int state) | |
373 | { | |
438adcaf | 374 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
375 | int res = -EINVAL; |
376 | ||
377 | switch (state) { | |
438adcaf PB |
378 | case TIPC_OPEN: |
379 | res = 0; | |
380 | break; | |
0c288c86 | 381 | case TIPC_LISTEN: |
99a20889 | 382 | case TIPC_CONNECTING: |
438adcaf | 383 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
384 | res = 0; |
385 | break; | |
8ea642ee | 386 | case TIPC_ESTABLISHED: |
99a20889 | 387 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 388 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
389 | res = 0; |
390 | break; | |
9fd4b070 | 391 | case TIPC_DISCONNECTING: |
99a20889 | 392 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
393 | oldsk_state == TIPC_ESTABLISHED) |
394 | res = 0; | |
395 | break; | |
0c288c86 PB |
396 | } |
397 | ||
398 | if (!res) | |
399 | sk->sk_state = state; | |
400 | ||
401 | return res; | |
402 | } | |
403 | ||
8c44e1af JPM |
404 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
405 | { | |
406 | struct sock *sk = sock->sk; | |
407 | int err = sock_error(sk); | |
408 | int typ = sock->type; | |
409 | ||
410 | if (err) | |
411 | return err; | |
412 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
413 | if (sk->sk_state == TIPC_DISCONNECTING) | |
414 | return -EPIPE; | |
415 | else if (!tipc_sk_connected(sk)) | |
416 | return -ENOTCONN; | |
417 | } | |
418 | if (!*timeout) | |
419 | return -EAGAIN; | |
420 | if (signal_pending(current)) | |
421 | return sock_intr_errno(*timeout); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
844cf763 JPM |
426 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
427 | ({ \ | |
bfd07f3d | 428 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ |
844cf763 JPM |
429 | struct sock *sk_; \ |
430 | int rc_; \ | |
431 | \ | |
432 | while ((rc_ = !(condition_))) { \ | |
bfd07f3d TN |
433 | /* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \ |
434 | smp_rmb(); \ | |
844cf763 JPM |
435 | sk_ = (sock_)->sk; \ |
436 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
437 | if (rc_) \ | |
438 | break; \ | |
223b7329 | 439 | add_wait_queue(sk_sleep(sk_), &wait_); \ |
844cf763 JPM |
440 | release_sock(sk_); \ |
441 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
442 | sched_annotate_sleep(); \ | |
443 | lock_sock(sk_); \ | |
444 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
445 | } \ | |
446 | rc_; \ | |
8c44e1af JPM |
447 | }) |
448 | ||
b97bf3fd | 449 | /** |
c5fa7b3c | 450 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 451 | * @net: network namespace (must be default network) |
b97bf3fd PL |
452 | * @sock: pre-allocated socket structure |
453 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 454 | * @kern: caused by kernel or by userspace? |
c4307285 | 455 | * |
0c3141e9 AS |
456 | * This routine creates additional data structures used by the TIPC socket, |
457 | * initializes them, and links them together. | |
b97bf3fd | 458 | * |
637b77fd | 459 | * Return: 0 on success, errno otherwise |
b97bf3fd | 460 | */ |
58ed9442 JPM |
461 | static int tipc_sk_create(struct net *net, struct socket *sock, |
462 | int protocol, int kern) | |
b97bf3fd | 463 | { |
0c3141e9 | 464 | const struct proto_ops *ops; |
b97bf3fd | 465 | struct sock *sk; |
58ed9442 | 466 | struct tipc_sock *tsk; |
5b8fa7ce | 467 | struct tipc_msg *msg; |
0c3141e9 AS |
468 | |
469 | /* Validate arguments */ | |
b97bf3fd PL |
470 | if (unlikely(protocol != 0)) |
471 | return -EPROTONOSUPPORT; | |
472 | ||
b97bf3fd PL |
473 | switch (sock->type) { |
474 | case SOCK_STREAM: | |
0c3141e9 | 475 | ops = &stream_ops; |
b97bf3fd PL |
476 | break; |
477 | case SOCK_SEQPACKET: | |
0c3141e9 | 478 | ops = &packet_ops; |
b97bf3fd PL |
479 | break; |
480 | case SOCK_DGRAM: | |
b97bf3fd | 481 | case SOCK_RDM: |
0c3141e9 | 482 | ops = &msg_ops; |
b97bf3fd | 483 | break; |
49978651 | 484 | default: |
49978651 | 485 | return -EPROTOTYPE; |
b97bf3fd PL |
486 | } |
487 | ||
0c3141e9 | 488 | /* Allocate socket's protocol area */ |
11aa9c28 | 489 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 490 | if (sk == NULL) |
b97bf3fd | 491 | return -ENOMEM; |
b97bf3fd | 492 | |
58ed9442 | 493 | tsk = tipc_sk(sk); |
301bae56 | 494 | tsk->max_pkt = MAX_PKT_DEFAULT; |
c0bceb97 | 495 | tsk->maxnagle = 0; |
0a3e060f | 496 | tsk->nagle_start = NAGLE_START_INIT; |
301bae56 | 497 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 498 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 499 | msg = &tsk->phdr; |
b97bf3fd | 500 | |
0c3141e9 | 501 | /* Finish initializing socket data structures */ |
0c3141e9 | 502 | sock->ops = ops; |
0c3141e9 | 503 | sock_init_data(sock, sk); |
438adcaf | 504 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 505 | if (tipc_sk_insert(tsk)) { |
00aff359 | 506 | sk_free(sk); |
c19ca6cb | 507 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
508 | return -EINVAL; |
509 | } | |
40f9f439 HX |
510 | |
511 | /* Ensure tsk is visible before we read own_addr. */ | |
512 | smp_mb(); | |
513 | ||
23fd3eac JM |
514 | tipc_msg_init(tipc_own_addr(net), msg, TIPC_LOW_IMPORTANCE, |
515 | TIPC_NAMED_MSG, NAMED_H_SIZE, 0); | |
40f9f439 | 516 | |
07f6c4bc | 517 | msg_set_origport(msg, tsk->portid); |
31b102bb | 518 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 519 | sk->sk_shutdown = 0; |
64ac5f59 | 520 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
02739545 | 521 | sk->sk_rcvbuf = READ_ONCE(sysctl_tipc_rmem[1]); |
f288bef4 YX |
522 | sk->sk_data_ready = tipc_data_ready; |
523 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 524 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 525 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
1b22bcad | 526 | tsk->group_is_open = true; |
4f4482dc | 527 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 528 | |
10724cc7 JPM |
529 | /* Start out with safe limits until we receive an advertised window */ |
530 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
531 | tsk->rcv_win = tsk->snd_win; | |
532 | ||
c752023a | 533 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 534 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 535 | if (sock->type == SOCK_DGRAM) |
301bae56 | 536 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 537 | } |
2948a1fc | 538 | __skb_queue_head_init(&tsk->mc_method.deferredq); |
01e661eb | 539 | trace_tipc_sk_create(sk, NULL, TIPC_DUMP_NONE, " "); |
b97bf3fd PL |
540 | return 0; |
541 | } | |
542 | ||
07f6c4bc YX |
543 | static void tipc_sk_callback(struct rcu_head *head) |
544 | { | |
545 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
546 | ||
547 | sock_put(&tsk->sk); | |
548 | } | |
549 | ||
6f00089c PB |
550 | /* Caller should hold socket lock for the socket. */ |
551 | static void __tipc_shutdown(struct socket *sock, int error) | |
552 | { | |
553 | struct sock *sk = sock->sk; | |
554 | struct tipc_sock *tsk = tipc_sk(sk); | |
555 | struct net *net = sock_net(sk); | |
12db3c80 | 556 | long timeout = msecs_to_jiffies(CONN_TIMEOUT_DEFAULT); |
6f00089c PB |
557 | u32 dnode = tsk_peer_node(tsk); |
558 | struct sk_buff *skb; | |
559 | ||
365ad353 JPM |
560 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
561 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
562 | !tsk_conn_cong(tsk))); | |
563 | ||
d34910e1 | 564 | /* Push out delayed messages if in Nagle mode */ |
0a3e060f | 565 | tipc_sk_push_backlog(tsk, false); |
d34910e1 TN |
566 | /* Remove pending SYN */ |
567 | __skb_queue_purge(&sk->sk_write_queue); | |
67879274 | 568 | |
49afb806 TL |
569 | /* Remove partially received buffer if any */ |
570 | skb = skb_peek(&sk->sk_receive_queue); | |
571 | if (skb && TIPC_SKB_CB(skb)->bytes_read) { | |
572 | __skb_unlink(skb, &sk->sk_receive_queue); | |
573 | kfree_skb(skb); | |
6f00089c | 574 | } |
693c5649 | 575 | |
49afb806 TL |
576 | /* Reject all unreceived messages if connectionless */ |
577 | if (tipc_sk_type_connectionless(sk)) { | |
578 | tsk_rej_rx_queue(sk, error); | |
693c5649 | 579 | return; |
49afb806 | 580 | } |
693c5649 | 581 | |
49afb806 TL |
582 | switch (sk->sk_state) { |
583 | case TIPC_CONNECTING: | |
584 | case TIPC_ESTABLISHED: | |
585 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
586 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
587 | /* Send a FIN+/- to its peer */ | |
588 | skb = __skb_dequeue(&sk->sk_receive_queue); | |
589 | if (skb) { | |
590 | __skb_queue_purge(&sk->sk_receive_queue); | |
591 | tipc_sk_respond(sk, skb, error); | |
592 | break; | |
593 | } | |
6f00089c PB |
594 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
595 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
596 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
597 | tsk->portid, error); | |
598 | if (skb) | |
599 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
49afb806 TL |
600 | break; |
601 | case TIPC_LISTEN: | |
602 | /* Reject all SYN messages */ | |
603 | tsk_rej_rx_queue(sk, error); | |
604 | break; | |
605 | default: | |
606 | __skb_queue_purge(&sk->sk_receive_queue); | |
607 | break; | |
6f00089c PB |
608 | } |
609 | } | |
610 | ||
b97bf3fd | 611 | /** |
247f0f3c | 612 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
613 | * @sock: socket to destroy |
614 | * | |
615 | * This routine cleans up any messages that are still queued on the socket. | |
616 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
617 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
618 | * and any others are discarded. (If the first message on a STREAM socket | |
619 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 620 | * |
b97bf3fd PL |
621 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
622 | * are returned or discarded according to the "destination droppable" setting | |
623 | * specified for the message by the sender. | |
624 | * | |
637b77fd | 625 | * Return: 0 on success, errno otherwise |
b97bf3fd | 626 | */ |
247f0f3c | 627 | static int tipc_release(struct socket *sock) |
b97bf3fd | 628 | { |
b97bf3fd | 629 | struct sock *sk = sock->sk; |
58ed9442 | 630 | struct tipc_sock *tsk; |
b97bf3fd | 631 | |
0c3141e9 AS |
632 | /* |
633 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
634 | * releases a pre-allocated child socket that was never used) | |
635 | */ | |
0c3141e9 | 636 | if (sk == NULL) |
b97bf3fd | 637 | return 0; |
c4307285 | 638 | |
58ed9442 | 639 | tsk = tipc_sk(sk); |
0c3141e9 AS |
640 | lock_sock(sk); |
641 | ||
01e661eb | 642 | trace_tipc_sk_release(sk, NULL, TIPC_DUMP_ALL, " "); |
6f00089c PB |
643 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
644 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 645 | tipc_sk_leave(tsk); |
2c98da07 | 646 | tipc_sk_withdraw(tsk, NULL); |
c55c8eda | 647 | __skb_queue_purge(&tsk->mc_method.deferredq); |
1ea23a21 | 648 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 649 | tipc_sk_remove(tsk); |
b97bf3fd | 650 | |
0a3b8b2b | 651 | sock_orphan(sk); |
0c3141e9 | 652 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 653 | release_sock(sk); |
a80ae530 | 654 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 655 | tsk->cong_link_cnt = 0; |
07f6c4bc | 656 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 657 | sock->sk = NULL; |
b97bf3fd | 658 | |
065d7e39 | 659 | return 0; |
b97bf3fd PL |
660 | } |
661 | ||
662 | /** | |
60c102ee | 663 | * __tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd | 664 | * @sock: socket structure |
60c102ee JM |
665 | * @skaddr: socket address describing name(s) and desired operation |
666 | * @alen: size of socket address data structure | |
c4307285 | 667 | * |
326af505 | 668 | * Name and name sequence binding are indicated using a positive scope value; |
b97bf3fd PL |
669 | * a negative scope value unbinds the specified name. Specifying no name |
670 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 671 | * |
637b77fd | 672 | * Return: 0 on success, errno otherwise |
0c3141e9 AS |
673 | * |
674 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
675 | * access any non-constant socket information. | |
b97bf3fd | 676 | */ |
60c102ee | 677 | static int __tipc_bind(struct socket *sock, struct sockaddr *skaddr, int alen) |
b97bf3fd | 678 | { |
50a3499a | 679 | struct tipc_uaddr *ua = (struct tipc_uaddr *)skaddr; |
60c102ee | 680 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
50a3499a | 681 | bool unbind = false; |
b97bf3fd | 682 | |
60c102ee | 683 | if (unlikely(!alen)) |
2c98da07 | 684 | return tipc_sk_withdraw(tsk, NULL); |
b97bf3fd | 685 | |
50a3499a JM |
686 | if (ua->addrtype == TIPC_SERVICE_ADDR) { |
687 | ua->addrtype = TIPC_SERVICE_RANGE; | |
688 | ua->sr.upper = ua->sr.lower; | |
689 | } | |
690 | if (ua->scope < 0) { | |
691 | unbind = true; | |
692 | ua->scope = -ua->scope; | |
693 | } | |
694 | /* Users may still use deprecated TIPC_ZONE_SCOPE */ | |
695 | if (ua->scope != TIPC_NODE_SCOPE) | |
696 | ua->scope = TIPC_CLUSTER_SCOPE; | |
c4307285 | 697 | |
60c102ee JM |
698 | if (tsk->group) |
699 | return -EACCES; | |
700 | ||
50a3499a | 701 | if (unbind) |
2c98da07 | 702 | return tipc_sk_withdraw(tsk, ua); |
50a3499a | 703 | return tipc_sk_publish(tsk, ua); |
60c102ee JM |
704 | } |
705 | ||
706 | int tipc_sk_bind(struct socket *sock, struct sockaddr *skaddr, int alen) | |
707 | { | |
708 | int res; | |
709 | ||
710 | lock_sock(sock->sk); | |
711 | res = __tipc_bind(sock, skaddr, alen); | |
712 | release_sock(sock->sk); | |
84602761 | 713 | return res; |
b97bf3fd PL |
714 | } |
715 | ||
72671b35 JM |
716 | static int tipc_bind(struct socket *sock, struct sockaddr *skaddr, int alen) |
717 | { | |
50a3499a JM |
718 | struct tipc_uaddr *ua = (struct tipc_uaddr *)skaddr; |
719 | u32 atype = ua->addrtype; | |
72671b35 JM |
720 | |
721 | if (alen) { | |
50a3499a | 722 | if (!tipc_uaddr_valid(ua, alen)) |
72671b35 | 723 | return -EINVAL; |
50a3499a | 724 | if (atype == TIPC_SOCKET_ADDR) |
60c102ee | 725 | return -EAFNOSUPPORT; |
50a3499a | 726 | if (ua->sr.type < TIPC_RESERVED_TYPES) { |
72671b35 | 727 | pr_warn_once("Can't bind to reserved service type %u\n", |
50a3499a | 728 | ua->sr.type); |
72671b35 JM |
729 | return -EACCES; |
730 | } | |
731 | } | |
732 | return tipc_sk_bind(sock, skaddr, alen); | |
733 | } | |
734 | ||
c4307285 | 735 | /** |
247f0f3c | 736 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
737 | * @sock: socket structure |
738 | * @uaddr: area for returned socket address | |
2da59918 | 739 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 740 | * |
637b77fd | 741 | * Return: 0 on success, errno otherwise |
0c3141e9 | 742 | * |
2da59918 AS |
743 | * NOTE: This routine doesn't need to take the socket lock since it only |
744 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 745 | * a completely predictable manner). |
b97bf3fd | 746 | */ |
247f0f3c | 747 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
9b2c45d4 | 748 | int peer) |
b97bf3fd | 749 | { |
b97bf3fd | 750 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
751 | struct sock *sk = sock->sk; |
752 | struct tipc_sock *tsk = tipc_sk(sk); | |
b97bf3fd | 753 | |
88f8a5e3 | 754 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 755 | if (peer) { |
f40acbaf | 756 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 757 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 758 | return -ENOTCONN; |
301bae56 JPM |
759 | addr->addr.id.ref = tsk_peer_port(tsk); |
760 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 761 | } else { |
07f6c4bc | 762 | addr->addr.id.ref = tsk->portid; |
23fd3eac | 763 | addr->addr.id.node = tipc_own_addr(sock_net(sk)); |
0c3141e9 | 764 | } |
b97bf3fd | 765 | |
b6f88d9c | 766 | addr->addrtype = TIPC_SOCKET_ADDR; |
b97bf3fd PL |
767 | addr->family = AF_TIPC; |
768 | addr->scope = 0; | |
b97bf3fd PL |
769 | addr->addr.name.domain = 0; |
770 | ||
9b2c45d4 | 771 | return sizeof(*addr); |
b97bf3fd PL |
772 | } |
773 | ||
774 | /** | |
a11e1d43 | 775 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
776 | * @file: file structure associated with the socket |
777 | * @sock: socket for which to calculate the poll bits | |
a11e1d43 | 778 | * @wait: ??? |
b97bf3fd | 779 | * |
637b77fd | 780 | * Return: pollmask value |
9b674e82 AS |
781 | * |
782 | * COMMENTARY: | |
783 | * It appears that the usual socket locking mechanisms are not useful here | |
784 | * since the pollmask info is potentially out-of-date the moment this routine | |
785 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
786 | * to handle any preventable race conditions, so TIPC will do the same ... | |
787 | * | |
f662c070 AS |
788 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
789 | * imply that the operation will succeed, merely that it should be performed | |
790 | * and will not block. | |
b97bf3fd | 791 | */ |
a11e1d43 LT |
792 | static __poll_t tipc_poll(struct file *file, struct socket *sock, |
793 | poll_table *wait) | |
b97bf3fd | 794 | { |
9b674e82 | 795 | struct sock *sk = sock->sk; |
58ed9442 | 796 | struct tipc_sock *tsk = tipc_sk(sk); |
ade994f4 | 797 | __poll_t revents = 0; |
9b674e82 | 798 | |
89ab066d | 799 | sock_poll_wait(file, sock, wait); |
01e661eb | 800 | trace_tipc_sk_poll(sk, NULL, TIPC_DUMP_ALL, " "); |
a11e1d43 | 801 | |
6f00089c | 802 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 803 | revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
6f00089c | 804 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 805 | revents |= EPOLLHUP; |
6f00089c | 806 | |
f40acbaf PB |
807 | switch (sk->sk_state) { |
808 | case TIPC_ESTABLISHED: | |
365ad353 | 809 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
a9a08845 | 810 | revents |= EPOLLOUT; |
7f8901b7 | 811 | fallthrough; |
f40acbaf | 812 | case TIPC_LISTEN: |
ff946833 | 813 | case TIPC_CONNECTING: |
3ef7cf57 | 814 | if (!skb_queue_empty_lockless(&sk->sk_receive_queue)) |
a9a08845 | 815 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
816 | break; |
817 | case TIPC_OPEN: | |
60c25306 | 818 | if (tsk->group_is_open && !tsk->cong_link_cnt) |
a9a08845 | 819 | revents |= EPOLLOUT; |
ae236fb2 JM |
820 | if (!tipc_sk_type_connectionless(sk)) |
821 | break; | |
3ef7cf57 | 822 | if (skb_queue_empty_lockless(&sk->sk_receive_queue)) |
ae236fb2 | 823 | break; |
a9a08845 | 824 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
825 | break; |
826 | case TIPC_DISCONNECTING: | |
a9a08845 | 827 | revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP; |
f40acbaf | 828 | break; |
f662c070 | 829 | } |
ae236fb2 | 830 | return revents; |
b97bf3fd PL |
831 | } |
832 | ||
0abd8ff2 JPM |
833 | /** |
834 | * tipc_sendmcast - send multicast message | |
835 | * @sock: socket structure | |
833f8670 | 836 | * @ua: destination address struct |
562640f3 | 837 | * @msg: message to send |
365ad353 JPM |
838 | * @dlen: length of data to send |
839 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
840 | * |
841 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
637b77fd | 842 | * Return: the number of bytes sent on success, or errno |
0abd8ff2 | 843 | */ |
833f8670 | 844 | static int tipc_sendmcast(struct socket *sock, struct tipc_uaddr *ua, |
365ad353 | 845 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
846 | { |
847 | struct sock *sk = sock->sk; | |
c5898636 | 848 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 849 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 850 | struct net *net = sock_net(sk); |
365ad353 JPM |
851 | int mtu = tipc_bcast_get_mtu(net); |
852 | struct sk_buff_head pkts; | |
a853e4c6 | 853 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
854 | int rc; |
855 | ||
75da2163 JM |
856 | if (tsk->group) |
857 | return -EACCES; | |
858 | ||
a853e4c6 | 859 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
860 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
861 | if (unlikely(rc)) | |
862 | return rc; | |
f214fc40 | 863 | |
a853e4c6 JPM |
864 | /* Lookup destination nodes */ |
865 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
833f8670 | 866 | tipc_nametbl_lookup_mcast_nodes(net, ua, &dsts); |
a853e4c6 JPM |
867 | if (!dsts.local && !dsts.remote) |
868 | return -EHOSTUNREACH; | |
869 | ||
870 | /* Build message header */ | |
365ad353 | 871 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 872 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
873 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
874 | msg_set_destport(hdr, 0); | |
875 | msg_set_destnode(hdr, 0); | |
833f8670 JM |
876 | msg_set_nametype(hdr, ua->sr.type); |
877 | msg_set_namelower(hdr, ua->sr.lower); | |
878 | msg_set_nameupper(hdr, ua->sr.upper); | |
365ad353 | 879 | |
a853e4c6 | 880 | /* Build message as chain of buffers */ |
e654f9f5 | 881 | __skb_queue_head_init(&pkts); |
365ad353 | 882 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); |
0abd8ff2 | 883 | |
a853e4c6 | 884 | /* Send message if build was successful */ |
01e661eb TL |
885 | if (unlikely(rc == dlen)) { |
886 | trace_tipc_sk_sendmcast(sk, skb_peek(&pkts), | |
887 | TIPC_DUMP_SK_SNDQ, " "); | |
833f8670 | 888 | rc = tipc_mcast_xmit(net, &pkts, &tsk->mc_method, &dsts, |
a853e4c6 | 889 | &tsk->cong_link_cnt); |
01e661eb | 890 | } |
a853e4c6 JPM |
891 | |
892 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
893 | |
894 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
895 | } |
896 | ||
27bd9ec0 JM |
897 | /** |
898 | * tipc_send_group_msg - send a message to a member in the group | |
899 | * @net: network namespace | |
f172f4b8 | 900 | * @tsk: tipc socket |
27bd9ec0 JM |
901 | * @m: message to send |
902 | * @mb: group member | |
903 | * @dnode: destination node | |
904 | * @dport: destination port | |
905 | * @dlen: total length of message data | |
906 | */ | |
907 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
908 | struct msghdr *m, struct tipc_member *mb, | |
909 | u32 dnode, u32 dport, int dlen) | |
910 | { | |
b87a5ea3 | 911 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 912 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
913 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
914 | struct tipc_msg *hdr = &tsk->phdr; | |
915 | struct sk_buff_head pkts; | |
916 | int mtu, rc; | |
917 | ||
918 | /* Complete message header */ | |
919 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
920 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
921 | msg_set_destport(hdr, dport); | |
922 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 923 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
924 | |
925 | /* Build message as chain of buffers */ | |
e654f9f5 | 926 | __skb_queue_head_init(&pkts); |
f73b1281 | 927 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid, false); |
27bd9ec0 JM |
928 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
929 | if (unlikely(rc != dlen)) | |
930 | return rc; | |
931 | ||
932 | /* Send message */ | |
933 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
934 | if (unlikely(rc == -ELINKCONG)) { | |
935 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
936 | tsk->cong_link_cnt++; | |
937 | } | |
938 | ||
2f487712 | 939 | /* Update send window */ |
27bd9ec0 JM |
940 | tipc_group_update_member(mb, blks); |
941 | ||
2f487712 JM |
942 | /* A broadcast sent within next EXPIRE period must follow same path */ |
943 | method->rcast = true; | |
944 | method->mandatory = true; | |
27bd9ec0 JM |
945 | return dlen; |
946 | } | |
947 | ||
948 | /** | |
949 | * tipc_send_group_unicast - send message to a member in the group | |
950 | * @sock: socket structure | |
951 | * @m: message to send | |
952 | * @dlen: total length of message data | |
953 | * @timeout: timeout to wait for wakeup | |
954 | * | |
955 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
637b77fd | 956 | * Return: the number of bytes sent on success, or errno |
27bd9ec0 JM |
957 | */ |
958 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
959 | int dlen, long timeout) | |
960 | { | |
961 | struct sock *sk = sock->sk; | |
006ed14e | 962 | struct tipc_uaddr *ua = (struct tipc_uaddr *)m->msg_name; |
27bd9ec0 JM |
963 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
964 | struct tipc_sock *tsk = tipc_sk(sk); | |
27bd9ec0 JM |
965 | struct net *net = sock_net(sk); |
966 | struct tipc_member *mb = NULL; | |
967 | u32 node, port; | |
968 | int rc; | |
969 | ||
006ed14e JM |
970 | node = ua->sk.node; |
971 | port = ua->sk.ref; | |
27bd9ec0 JM |
972 | if (!port && !node) |
973 | return -EHOSTUNREACH; | |
974 | ||
975 | /* Block or return if destination link or member is congested */ | |
976 | rc = tipc_wait_for_cond(sock, &timeout, | |
977 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
143ece65 CW |
978 | tsk->group && |
979 | !tipc_group_cong(tsk->group, node, port, blks, | |
980 | &mb)); | |
27bd9ec0 JM |
981 | if (unlikely(rc)) |
982 | return rc; | |
983 | ||
984 | if (unlikely(!mb)) | |
985 | return -EHOSTUNREACH; | |
986 | ||
987 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
988 | ||
989 | return rc ? rc : dlen; | |
990 | } | |
991 | ||
ee106d7f JM |
992 | /** |
993 | * tipc_send_group_anycast - send message to any member with given identity | |
994 | * @sock: socket structure | |
995 | * @m: message to send | |
996 | * @dlen: total length of message data | |
997 | * @timeout: timeout to wait for wakeup | |
998 | * | |
999 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
637b77fd | 1000 | * Return: the number of bytes sent on success, or errno |
ee106d7f JM |
1001 | */ |
1002 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
1003 | int dlen, long timeout) | |
1004 | { | |
006ed14e | 1005 | struct tipc_uaddr *ua = (struct tipc_uaddr *)m->msg_name; |
ee106d7f JM |
1006 | struct sock *sk = sock->sk; |
1007 | struct tipc_sock *tsk = tipc_sk(sk); | |
1008 | struct list_head *cong_links = &tsk->cong_links; | |
1009 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
232d07b7 | 1010 | struct tipc_msg *hdr = &tsk->phdr; |
ee106d7f JM |
1011 | struct tipc_member *first = NULL; |
1012 | struct tipc_member *mbr = NULL; | |
1013 | struct net *net = sock_net(sk); | |
1014 | u32 node, port, exclude; | |
ee106d7f JM |
1015 | struct list_head dsts; |
1016 | int lookups = 0; | |
1017 | int dstcnt, rc; | |
1018 | bool cong; | |
1019 | ||
1020 | INIT_LIST_HEAD(&dsts); | |
006ed14e JM |
1021 | ua->sa.type = msg_nametype(hdr); |
1022 | ua->scope = msg_lookup_scope(hdr); | |
ee106d7f JM |
1023 | |
1024 | while (++lookups < 4) { | |
143ece65 CW |
1025 | exclude = tipc_group_exclude(tsk->group); |
1026 | ||
ee106d7f JM |
1027 | first = NULL; |
1028 | ||
1029 | /* Look for a non-congested destination member, if any */ | |
1030 | while (1) { | |
006ed14e JM |
1031 | if (!tipc_nametbl_lookup_group(net, ua, &dsts, &dstcnt, |
1032 | exclude, false)) | |
ee106d7f JM |
1033 | return -EHOSTUNREACH; |
1034 | tipc_dest_pop(&dsts, &node, &port); | |
143ece65 CW |
1035 | cong = tipc_group_cong(tsk->group, node, port, blks, |
1036 | &mbr); | |
ee106d7f JM |
1037 | if (!cong) |
1038 | break; | |
1039 | if (mbr == first) | |
1040 | break; | |
1041 | if (!first) | |
1042 | first = mbr; | |
1043 | } | |
1044 | ||
1045 | /* Start over if destination was not in member list */ | |
1046 | if (unlikely(!mbr)) | |
1047 | continue; | |
1048 | ||
1049 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
1050 | break; | |
1051 | ||
1052 | /* Block or return if destination link or member is congested */ | |
1053 | rc = tipc_wait_for_cond(sock, &timeout, | |
1054 | !tipc_dest_find(cong_links, node, 0) && | |
143ece65 CW |
1055 | tsk->group && |
1056 | !tipc_group_cong(tsk->group, node, port, | |
ee106d7f JM |
1057 | blks, &mbr)); |
1058 | if (unlikely(rc)) | |
1059 | return rc; | |
1060 | ||
1061 | /* Send, unless destination disappeared while waiting */ | |
1062 | if (likely(mbr)) | |
1063 | break; | |
1064 | } | |
1065 | ||
1066 | if (unlikely(lookups >= 4)) | |
1067 | return -EHOSTUNREACH; | |
1068 | ||
1069 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
1070 | ||
1071 | return rc ? rc : dlen; | |
1072 | } | |
1073 | ||
75da2163 JM |
1074 | /** |
1075 | * tipc_send_group_bcast - send message to all members in communication group | |
d8141208 | 1076 | * @sock: socket structure |
75da2163 JM |
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 | |
637b77fd | 1082 | * Return: the number of bytes sent on success, or errno |
75da2163 JM |
1083 | */ |
1084 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1085 | int dlen, long timeout) | |
1086 | { | |
006ed14e | 1087 | struct tipc_uaddr *ua = (struct tipc_uaddr *)m->msg_name; |
75da2163 JM |
1088 | struct sock *sk = sock->sk; |
1089 | struct net *net = sock_net(sk); | |
1090 | struct tipc_sock *tsk = tipc_sk(sk); | |
3c6306d4 | 1091 | struct tipc_nlist *dsts; |
75da2163 | 1092 | struct tipc_mc_method *method = &tsk->mc_method; |
2f487712 | 1093 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1094 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1095 | struct tipc_msg *hdr = &tsk->phdr; |
1096 | int mtu = tipc_bcast_get_mtu(net); | |
1097 | struct sk_buff_head pkts; | |
1098 | int rc = -EHOSTUNREACH; | |
1099 | ||
b7d42635 | 1100 | /* Block or return if any destination link or member is congested */ |
143ece65 CW |
1101 | rc = tipc_wait_for_cond(sock, &timeout, |
1102 | !tsk->cong_link_cnt && tsk->group && | |
1103 | !tipc_group_bc_cong(tsk->group, blks)); | |
75da2163 JM |
1104 | if (unlikely(rc)) |
1105 | return rc; | |
1106 | ||
3c6306d4 CW |
1107 | dsts = tipc_group_dests(tsk->group); |
1108 | if (!dsts->local && !dsts->remote) | |
1109 | return -EHOSTUNREACH; | |
1110 | ||
75da2163 | 1111 | /* Complete message header */ |
006ed14e | 1112 | if (ua) { |
5b8dddb6 | 1113 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); |
006ed14e | 1114 | msg_set_nameinst(hdr, ua->sa.instance); |
5b8dddb6 JM |
1115 | } else { |
1116 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1117 | msg_set_nameinst(hdr, 0); | |
1118 | } | |
b7d42635 | 1119 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1120 | msg_set_destport(hdr, 0); |
1121 | msg_set_destnode(hdr, 0); | |
143ece65 | 1122 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(tsk->group)); |
75da2163 | 1123 | |
2f487712 JM |
1124 | /* Avoid getting stuck with repeated forced replicasts */ |
1125 | msg_set_grp_bc_ack_req(hdr, ack); | |
1126 | ||
75da2163 | 1127 | /* Build message as chain of buffers */ |
e654f9f5 | 1128 | __skb_queue_head_init(&pkts); |
75da2163 JM |
1129 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1130 | if (unlikely(rc != dlen)) | |
1131 | return rc; | |
1132 | ||
1133 | /* Send message */ | |
2f487712 | 1134 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1135 | if (unlikely(rc)) |
1136 | return rc; | |
1137 | ||
b7d42635 | 1138 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1139 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1140 | ||
1141 | /* Broadcast link is now free to choose method for next broadcast */ | |
1142 | method->mandatory = false; | |
1143 | method->expires = jiffies; | |
1144 | ||
75da2163 JM |
1145 | return dlen; |
1146 | } | |
1147 | ||
5b8dddb6 JM |
1148 | /** |
1149 | * tipc_send_group_mcast - send message to all members with given identity | |
1150 | * @sock: socket structure | |
1151 | * @m: message to send | |
1152 | * @dlen: total length of message data | |
1153 | * @timeout: timeout to wait for wakeup | |
1154 | * | |
1155 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
637b77fd | 1156 | * Return: the number of bytes sent on success, or errno |
5b8dddb6 JM |
1157 | */ |
1158 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1159 | int dlen, long timeout) | |
1160 | { | |
006ed14e | 1161 | struct tipc_uaddr *ua = (struct tipc_uaddr *)m->msg_name; |
5b8dddb6 | 1162 | struct sock *sk = sock->sk; |
5b8dddb6 JM |
1163 | struct tipc_sock *tsk = tipc_sk(sk); |
1164 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 1165 | struct tipc_msg *hdr = &tsk->phdr; |
5b8dddb6 | 1166 | struct net *net = sock_net(sk); |
5b8dddb6 | 1167 | struct list_head dsts; |
006ed14e | 1168 | u32 dstcnt, exclude; |
5b8dddb6 JM |
1169 | |
1170 | INIT_LIST_HEAD(&dsts); | |
006ed14e JM |
1171 | ua->sa.type = msg_nametype(hdr); |
1172 | ua->scope = msg_lookup_scope(hdr); | |
5b8dddb6 | 1173 | exclude = tipc_group_exclude(grp); |
232d07b7 | 1174 | |
006ed14e | 1175 | if (!tipc_nametbl_lookup_group(net, ua, &dsts, &dstcnt, exclude, true)) |
5b8dddb6 JM |
1176 | return -EHOSTUNREACH; |
1177 | ||
1178 | if (dstcnt == 1) { | |
006ed14e | 1179 | tipc_dest_pop(&dsts, &ua->sk.node, &ua->sk.ref); |
5b8dddb6 JM |
1180 | return tipc_send_group_unicast(sock, m, dlen, timeout); |
1181 | } | |
1182 | ||
1183 | tipc_dest_list_purge(&dsts); | |
1184 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1185 | } | |
1186 | ||
cb1b7280 JPM |
1187 | /** |
1188 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
f172f4b8 | 1189 | * @net: the associated network namespace |
cb1b7280 JPM |
1190 | * @arrvq: queue with arriving messages, to be cloned after destination lookup |
1191 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1192 | * | |
1193 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1194 | */ |
cb1b7280 JPM |
1195 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1196 | struct sk_buff_head *inputq) | |
078bec82 | 1197 | { |
75da2163 | 1198 | u32 self = tipc_own_addr(net); |
cb1b7280 | 1199 | struct sk_buff *skb, *_skb; |
b053fcc4 | 1200 | u32 portid, onode; |
232d07b7 | 1201 | struct sk_buff_head tmpq; |
75da2163 | 1202 | struct list_head dports; |
232d07b7 | 1203 | struct tipc_msg *hdr; |
45ceea2d | 1204 | struct tipc_uaddr ua; |
232d07b7 | 1205 | int user, mtyp, hlen; |
3c724acd | 1206 | |
cb1b7280 | 1207 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1208 | INIT_LIST_HEAD(&dports); |
45ceea2d | 1209 | ua.addrtype = TIPC_SERVICE_RANGE; |
078bec82 | 1210 | |
5ef21325 | 1211 | /* tipc_skb_peek() increments the head skb's reference counter */ |
cb1b7280 JPM |
1212 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1213 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
232d07b7 JM |
1214 | hdr = buf_msg(skb); |
1215 | user = msg_user(hdr); | |
1216 | mtyp = msg_type(hdr); | |
1217 | hlen = skb_headroom(skb) + msg_hdr_sz(hdr); | |
232d07b7 | 1218 | onode = msg_orignode(hdr); |
45ceea2d | 1219 | ua.sr.type = msg_nametype(hdr); |
5ef21325 JM |
1220 | ua.sr.lower = msg_namelower(hdr); |
1221 | ua.sr.upper = msg_nameupper(hdr); | |
1222 | if (onode == self) | |
1223 | ua.scope = TIPC_ANY_SCOPE; | |
1224 | else | |
1225 | ua.scope = TIPC_CLUSTER_SCOPE; | |
232d07b7 | 1226 | |
2f487712 JM |
1227 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { |
1228 | spin_lock_bh(&inputq->lock); | |
1229 | if (skb_peek(arrvq) == skb) { | |
1230 | __skb_dequeue(arrvq); | |
1231 | __skb_queue_tail(inputq, skb); | |
1232 | } | |
c545a945 | 1233 | kfree_skb(skb); |
2f487712 JM |
1234 | spin_unlock_bh(&inputq->lock); |
1235 | continue; | |
1236 | } | |
232d07b7 JM |
1237 | |
1238 | /* Group messages require exact scope match */ | |
1239 | if (msg_in_group(hdr)) { | |
45ceea2d JM |
1240 | ua.sr.lower = 0; |
1241 | ua.sr.upper = ~0; | |
1242 | ua.scope = msg_lookup_scope(hdr); | |
75da2163 | 1243 | } |
232d07b7 JM |
1244 | |
1245 | /* Create destination port list: */ | |
5ef21325 | 1246 | tipc_nametbl_lookup_mcast_sockets(net, &ua, &dports); |
232d07b7 JM |
1247 | |
1248 | /* Clone message per destination */ | |
a80ae530 | 1249 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
232d07b7 | 1250 | _skb = __pskb_copy(skb, hlen, GFP_ATOMIC); |
cb1b7280 JPM |
1251 | if (_skb) { |
1252 | msg_set_destport(buf_msg(_skb), portid); | |
1253 | __skb_queue_tail(&tmpq, _skb); | |
1254 | continue; | |
1255 | } | |
1256 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1257 | } |
5ef21325 | 1258 | /* Append clones to inputq only if skb is still head of arrvq */ |
cb1b7280 JPM |
1259 | spin_lock_bh(&inputq->lock); |
1260 | if (skb_peek(arrvq) == skb) { | |
1261 | skb_queue_splice_tail_init(&tmpq, inputq); | |
5ef21325 | 1262 | /* Decrement the skb's refcnt */ |
75016891 | 1263 | kfree_skb(__skb_dequeue(arrvq)); |
cb1b7280 JPM |
1264 | } |
1265 | spin_unlock_bh(&inputq->lock); | |
1266 | __skb_queue_purge(&tmpq); | |
1267 | kfree_skb(skb); | |
078bec82 | 1268 | } |
cb1b7280 | 1269 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1270 | } |
1271 | ||
c0bceb97 JM |
1272 | /* tipc_sk_push_backlog(): send accumulated buffers in socket write queue |
1273 | * when socket is in Nagle mode | |
1274 | */ | |
0a3e060f | 1275 | static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack) |
c0bceb97 JM |
1276 | { |
1277 | struct sk_buff_head *txq = &tsk->sk.sk_write_queue; | |
0a3e060f | 1278 | struct sk_buff *skb = skb_peek_tail(txq); |
c0bceb97 JM |
1279 | struct net *net = sock_net(&tsk->sk); |
1280 | u32 dnode = tsk_peer_node(tsk); | |
1281 | int rc; | |
1282 | ||
0a3e060f TL |
1283 | if (nagle_ack) { |
1284 | tsk->pkt_cnt += skb_queue_len(txq); | |
1285 | if (!tsk->pkt_cnt || tsk->msg_acc / tsk->pkt_cnt < 2) { | |
1286 | tsk->oneway = 0; | |
1287 | if (tsk->nagle_start < NAGLE_START_MAX) | |
1288 | tsk->nagle_start *= 2; | |
1289 | tsk->expect_ack = false; | |
1290 | pr_debug("tsk %10u: bad nagle %u -> %u, next start %u!\n", | |
1291 | tsk->portid, tsk->msg_acc, tsk->pkt_cnt, | |
1292 | tsk->nagle_start); | |
1293 | } else { | |
1294 | tsk->nagle_start = NAGLE_START_INIT; | |
1295 | if (skb) { | |
1296 | msg_set_ack_required(buf_msg(skb)); | |
1297 | tsk->expect_ack = true; | |
1298 | } else { | |
1299 | tsk->expect_ack = false; | |
1300 | } | |
1301 | } | |
1302 | tsk->msg_acc = 0; | |
1303 | tsk->pkt_cnt = 0; | |
1304 | } | |
1305 | ||
d34910e1 TN |
1306 | if (!skb || tsk->cong_link_cnt) |
1307 | return; | |
1308 | ||
1309 | /* Do not send SYN again after congestion */ | |
1310 | if (msg_is_syn(buf_msg(skb))) | |
c0bceb97 JM |
1311 | return; |
1312 | ||
0a3e060f TL |
1313 | if (tsk->msg_acc) |
1314 | tsk->pkt_cnt += skb_queue_len(txq); | |
c0bceb97 JM |
1315 | tsk->snt_unacked += tsk->snd_backlog; |
1316 | tsk->snd_backlog = 0; | |
c0bceb97 JM |
1317 | rc = tipc_node_xmit(net, txq, dnode, tsk->portid); |
1318 | if (rc == -ELINKCONG) | |
1319 | tsk->cong_link_cnt = 1; | |
1320 | } | |
1321 | ||
ac0074ee | 1322 | /** |
64ac5f59 | 1323 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1324 | * @tsk: receiving socket |
bcd3ffd4 | 1325 | * @skb: pointer to message buffer. |
f172f4b8 RD |
1326 | * @inputq: buffer list containing the buffers |
1327 | * @xmitq: output message area | |
ac0074ee | 1328 | */ |
64ac5f59 | 1329 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
e7eb0582 | 1330 | struct sk_buff_head *inputq, |
64ac5f59 | 1331 | struct sk_buff_head *xmitq) |
ac0074ee | 1332 | { |
bcd3ffd4 | 1333 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1334 | u32 onode = tsk_own_node(tsk); |
1335 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1336 | int mtyp = msg_type(hdr); |
c0bceb97 | 1337 | bool was_cong; |
bcd3ffd4 | 1338 | |
ac0074ee | 1339 | /* Ignore if connection cannot be validated: */ |
01e661eb TL |
1340 | if (!tsk_peer_msg(tsk, hdr)) { |
1341 | trace_tipc_sk_drop_msg(sk, skb, TIPC_DUMP_NONE, "@proto_rcv!"); | |
ac0074ee | 1342 | goto exit; |
01e661eb | 1343 | } |
ac0074ee | 1344 | |
c1be7756 PB |
1345 | if (unlikely(msg_errcode(hdr))) { |
1346 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1347 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1348 | tsk_peer_port(tsk)); | |
1349 | sk->sk_state_change(sk); | |
e7eb0582 PB |
1350 | |
1351 | /* State change is ignored if socket already awake, | |
1352 | * - convert msg to abort msg and add to inqueue | |
1353 | */ | |
1354 | msg_set_user(hdr, TIPC_CRITICAL_IMPORTANCE); | |
1355 | msg_set_type(hdr, TIPC_CONN_MSG); | |
1356 | msg_set_size(hdr, BASIC_H_SIZE); | |
1357 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
1358 | __skb_queue_tail(inputq, skb); | |
1359 | return; | |
c1be7756 PB |
1360 | } |
1361 | ||
8ea642ee | 1362 | tsk->probe_unacked = false; |
ac0074ee | 1363 | |
bcd3ffd4 JPM |
1364 | if (mtyp == CONN_PROBE) { |
1365 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1366 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1367 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1368 | return; |
1369 | } else if (mtyp == CONN_ACK) { | |
c0bceb97 | 1370 | was_cong = tsk_conn_cong(tsk); |
0a3e060f | 1371 | tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr)); |
10724cc7 JPM |
1372 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1373 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1374 | tsk->snd_win = msg_adv_win(hdr); | |
c0bceb97 | 1375 | if (was_cong && !tsk_conn_cong(tsk)) |
bcd3ffd4 JPM |
1376 | sk->sk_write_space(sk); |
1377 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1378 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1379 | } |
ac0074ee | 1380 | exit: |
bcd3ffd4 | 1381 | kfree_skb(skb); |
ac0074ee JPM |
1382 | } |
1383 | ||
b97bf3fd | 1384 | /** |
247f0f3c | 1385 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1386 | * @sock: socket structure |
1387 | * @m: message to send | |
e2dafe87 | 1388 | * @dsz: amount of user data to be sent |
c4307285 | 1389 | * |
b97bf3fd | 1390 | * Message must have an destination specified explicitly. |
c4307285 | 1391 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1392 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1393 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1394 | * |
637b77fd | 1395 | * Return: the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1396 | */ |
1b784140 | 1397 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1398 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1399 | { |
1400 | struct sock *sk = sock->sk; | |
1401 | int ret; | |
1402 | ||
1403 | lock_sock(sk); | |
1404 | ret = __tipc_sendmsg(sock, m, dsz); | |
1405 | release_sock(sk); | |
1406 | ||
1407 | return ret; | |
1408 | } | |
1409 | ||
365ad353 | 1410 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1411 | { |
0c3141e9 | 1412 | struct sock *sk = sock->sk; |
f2f9800d | 1413 | struct net *net = sock_net(sk); |
365ad353 | 1414 | struct tipc_sock *tsk = tipc_sk(sk); |
908148bc | 1415 | struct tipc_uaddr *ua = (struct tipc_uaddr *)m->msg_name; |
365ad353 JPM |
1416 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1417 | struct list_head *clinks = &tsk->cong_links; | |
1418 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1419 | struct tipc_group *grp = tsk->group; |
365ad353 | 1420 | struct tipc_msg *hdr = &tsk->phdr; |
908148bc | 1421 | struct tipc_socket_addr skaddr; |
365ad353 | 1422 | struct sk_buff_head pkts; |
908148bc | 1423 | int atype, mtu, rc; |
b97bf3fd | 1424 | |
365ad353 | 1425 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1426 | return -EMSGSIZE; |
365ad353 | 1427 | |
908148bc JM |
1428 | if (ua) { |
1429 | if (!tipc_uaddr_valid(ua, m->msg_namelen)) | |
27bd9ec0 | 1430 | return -EINVAL; |
743902c5 | 1431 | atype = ua->addrtype; |
27bd9ec0 JM |
1432 | } |
1433 | ||
908148bc | 1434 | /* If socket belongs to a communication group follow other paths */ |
27bd9ec0 | 1435 | if (grp) { |
908148bc | 1436 | if (!ua) |
27bd9ec0 | 1437 | return tipc_send_group_bcast(sock, m, dlen, timeout); |
908148bc | 1438 | if (atype == TIPC_SERVICE_ADDR) |
ee106d7f | 1439 | return tipc_send_group_anycast(sock, m, dlen, timeout); |
908148bc | 1440 | if (atype == TIPC_SOCKET_ADDR) |
27bd9ec0 | 1441 | return tipc_send_group_unicast(sock, m, dlen, timeout); |
908148bc | 1442 | if (atype == TIPC_SERVICE_RANGE) |
5b8dddb6 | 1443 | return tipc_send_group_mcast(sock, m, dlen, timeout); |
27bd9ec0 JM |
1444 | return -EINVAL; |
1445 | } | |
75da2163 | 1446 | |
908148bc JM |
1447 | if (!ua) { |
1448 | ua = (struct tipc_uaddr *)&tsk->peer; | |
1449 | if (!syn && ua->family != AF_TIPC) | |
f2f8036e | 1450 | return -EDESTADDRREQ; |
02fdc14d | 1451 | atype = ua->addrtype; |
f2f8036e | 1452 | } |
365ad353 | 1453 | |
365ad353 | 1454 | if (unlikely(syn)) { |
0c288c86 | 1455 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1456 | return -EPIPE; |
438adcaf | 1457 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1458 | return -EISCONN; |
1459 | if (tsk->published) | |
1460 | return -EOPNOTSUPP; | |
14623e00 JM |
1461 | if (atype == TIPC_SERVICE_ADDR) |
1462 | tsk->conn_addrtype = atype; | |
25b9221b | 1463 | msg_set_syn(hdr, 1); |
b97bf3fd | 1464 | } |
e2dafe87 | 1465 | |
d6d86830 HZ |
1466 | memset(&skaddr, 0, sizeof(skaddr)); |
1467 | ||
908148bc JM |
1468 | /* Determine destination */ |
1469 | if (atype == TIPC_SERVICE_RANGE) { | |
833f8670 | 1470 | return tipc_sendmcast(sock, ua, m, dlen, timeout); |
908148bc JM |
1471 | } else if (atype == TIPC_SERVICE_ADDR) { |
1472 | skaddr.node = ua->lookup_node; | |
1473 | ua->scope = tipc_node2scope(skaddr.node); | |
1474 | if (!tipc_nametbl_lookup_anycast(net, ua, &skaddr)) | |
39a0295f | 1475 | return -EHOSTUNREACH; |
908148bc JM |
1476 | } else if (atype == TIPC_SOCKET_ADDR) { |
1477 | skaddr = ua->sk; | |
335b929b JM |
1478 | } else { |
1479 | return -EINVAL; | |
e2dafe87 JPM |
1480 | } |
1481 | ||
365ad353 | 1482 | /* Block or return if destination link is congested */ |
a80ae530 | 1483 | rc = tipc_wait_for_cond(sock, &timeout, |
908148bc | 1484 | !tipc_dest_find(clinks, skaddr.node, 0)); |
365ad353 JPM |
1485 | if (unlikely(rc)) |
1486 | return rc; | |
1487 | ||
908148bc JM |
1488 | /* Finally build message header */ |
1489 | msg_set_destnode(hdr, skaddr.node); | |
1490 | msg_set_destport(hdr, skaddr.ref); | |
1491 | if (atype == TIPC_SERVICE_ADDR) { | |
abc9b4e0 TL |
1492 | msg_set_type(hdr, TIPC_NAMED_MSG); |
1493 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
908148bc JM |
1494 | msg_set_nametype(hdr, ua->sa.type); |
1495 | msg_set_nameinst(hdr, ua->sa.instance); | |
1496 | msg_set_lookup_scope(hdr, ua->scope); | |
b6f88d9c | 1497 | } else { /* TIPC_SOCKET_ADDR */ |
abc9b4e0 TL |
1498 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
1499 | msg_set_lookup_scope(hdr, 0); | |
abc9b4e0 TL |
1500 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); |
1501 | } | |
1502 | ||
908148bc | 1503 | /* Add message body */ |
e654f9f5 | 1504 | __skb_queue_head_init(&pkts); |
908148bc | 1505 | mtu = tipc_node_get_mtu(net, skaddr.node, tsk->portid, true); |
365ad353 JPM |
1506 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1507 | if (unlikely(rc != dlen)) | |
39a0295f | 1508 | return rc; |
2fe97a57 TN |
1509 | if (unlikely(syn && !tipc_msg_skb_clone(&pkts, &sk->sk_write_queue))) { |
1510 | __skb_queue_purge(&pkts); | |
67879274 | 1511 | return -ENOMEM; |
2fe97a57 | 1512 | } |
e2dafe87 | 1513 | |
908148bc | 1514 | /* Send message */ |
01e661eb | 1515 | trace_tipc_sk_sendmsg(sk, skb_peek(&pkts), TIPC_DUMP_SK_SNDQ, " "); |
908148bc | 1516 | rc = tipc_node_xmit(net, &pkts, skaddr.node, tsk->portid); |
365ad353 | 1517 | if (unlikely(rc == -ELINKCONG)) { |
908148bc | 1518 | tipc_dest_push(clinks, skaddr.node, 0); |
365ad353 JPM |
1519 | tsk->cong_link_cnt++; |
1520 | rc = 0; | |
1521 | } | |
e2dafe87 | 1522 | |
f8dd60de | 1523 | if (unlikely(syn && !rc)) { |
365ad353 | 1524 | tipc_set_sk_state(sk, TIPC_CONNECTING); |
7387a72c | 1525 | if (dlen && timeout) { |
f8dd60de XL |
1526 | timeout = msecs_to_jiffies(timeout); |
1527 | tipc_wait_for_connect(sock, &timeout); | |
1528 | } | |
1529 | } | |
365ad353 JPM |
1530 | |
1531 | return rc ? rc : dlen; | |
b97bf3fd PL |
1532 | } |
1533 | ||
c4307285 | 1534 | /** |
365ad353 | 1535 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1536 | * @sock: socket structure |
4ccfe5e0 JPM |
1537 | * @m: data to send |
1538 | * @dsz: total length of data to be transmitted | |
c4307285 | 1539 | * |
4ccfe5e0 | 1540 | * Used for SOCK_STREAM data. |
c4307285 | 1541 | * |
637b77fd | 1542 | * Return: the number of bytes sent on success (or partial success), |
4ccfe5e0 | 1543 | * or errno if no data sent |
b97bf3fd | 1544 | */ |
365ad353 | 1545 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1546 | { |
1547 | struct sock *sk = sock->sk; | |
1548 | int ret; | |
1549 | ||
1550 | lock_sock(sk); | |
365ad353 | 1551 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1552 | release_sock(sk); |
1553 | ||
1554 | return ret; | |
1555 | } | |
1556 | ||
365ad353 | 1557 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1558 | { |
0c3141e9 | 1559 | struct sock *sk = sock->sk; |
342dfc30 | 1560 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 | 1561 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c0bceb97 | 1562 | struct sk_buff_head *txq = &sk->sk_write_queue; |
365ad353 JPM |
1563 | struct tipc_sock *tsk = tipc_sk(sk); |
1564 | struct tipc_msg *hdr = &tsk->phdr; | |
1565 | struct net *net = sock_net(sk); | |
0a3e060f | 1566 | struct sk_buff *skb; |
365ad353 | 1567 | u32 dnode = tsk_peer_node(tsk); |
c0bceb97 JM |
1568 | int maxnagle = tsk->maxnagle; |
1569 | int maxpkt = tsk->max_pkt; | |
365ad353 | 1570 | int send, sent = 0; |
c0bceb97 | 1571 | int blocks, rc = 0; |
7cf87fa2 | 1572 | |
365ad353 JPM |
1573 | if (unlikely(dlen > INT_MAX)) |
1574 | return -EMSGSIZE; | |
4ccfe5e0 | 1575 | |
365ad353 | 1576 | /* Handle implicit connection setup */ |
f8dd60de | 1577 | if (unlikely(dest && sk->sk_state == TIPC_OPEN)) { |
365ad353 | 1578 | rc = __tipc_sendmsg(sock, m, dlen); |
92ef12b3 PB |
1579 | if (dlen && dlen == rc) { |
1580 | tsk->peer_caps = tipc_node_get_capabilities(net, dnode); | |
365ad353 | 1581 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); |
92ef12b3 | 1582 | } |
39a0295f | 1583 | return rc; |
365ad353 | 1584 | } |
f214fc40 | 1585 | |
c4307285 | 1586 | do { |
365ad353 JPM |
1587 | rc = tipc_wait_for_cond(sock, &timeout, |
1588 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1589 | !tsk_conn_cong(tsk) && |
1590 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1591 | if (unlikely(rc)) |
1592 | break; | |
365ad353 | 1593 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); |
c0bceb97 | 1594 | blocks = tsk->snd_backlog; |
c9aa81fa TL |
1595 | if (tsk->oneway++ >= tsk->nagle_start && maxnagle && |
1596 | send <= maxnagle) { | |
c0bceb97 JM |
1597 | rc = tipc_msg_append(hdr, m, send, maxnagle, txq); |
1598 | if (unlikely(rc < 0)) | |
1599 | break; | |
1600 | blocks += rc; | |
0a3e060f | 1601 | tsk->msg_acc++; |
c0bceb97 JM |
1602 | if (blocks <= 64 && tsk->expect_ack) { |
1603 | tsk->snd_backlog = blocks; | |
1604 | sent += send; | |
1605 | break; | |
0a3e060f TL |
1606 | } else if (blocks > 64) { |
1607 | tsk->pkt_cnt += skb_queue_len(txq); | |
1608 | } else { | |
1609 | skb = skb_peek_tail(txq); | |
4c21daae Y |
1610 | if (skb) { |
1611 | msg_set_ack_required(buf_msg(skb)); | |
1612 | tsk->expect_ack = true; | |
1613 | } else { | |
1614 | tsk->expect_ack = false; | |
1615 | } | |
0a3e060f TL |
1616 | tsk->msg_acc = 0; |
1617 | tsk->pkt_cnt = 0; | |
c0bceb97 | 1618 | } |
c0bceb97 JM |
1619 | } else { |
1620 | rc = tipc_msg_build(hdr, m, sent, send, maxpkt, txq); | |
1621 | if (unlikely(rc != send)) | |
1622 | break; | |
1623 | blocks += tsk_inc(tsk, send + MIN_H_SIZE); | |
1624 | } | |
1625 | trace_tipc_sk_sendstream(sk, skb_peek(txq), | |
01e661eb | 1626 | TIPC_DUMP_SK_SNDQ, " "); |
c0bceb97 | 1627 | rc = tipc_node_xmit(net, txq, dnode, tsk->portid); |
365ad353 JPM |
1628 | if (unlikely(rc == -ELINKCONG)) { |
1629 | tsk->cong_link_cnt = 1; | |
1630 | rc = 0; | |
1631 | } | |
1632 | if (likely(!rc)) { | |
c0bceb97 JM |
1633 | tsk->snt_unacked += blocks; |
1634 | tsk->snd_backlog = 0; | |
365ad353 JPM |
1635 | sent += send; |
1636 | } | |
1637 | } while (sent < dlen && !rc); | |
39a0295f | 1638 | |
3364d61c | 1639 | return sent ? sent : rc; |
b97bf3fd PL |
1640 | } |
1641 | ||
c4307285 | 1642 | /** |
4ccfe5e0 | 1643 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1644 | * @sock: socket structure |
4ccfe5e0 JPM |
1645 | * @m: message to send |
1646 | * @dsz: length of data to be transmitted | |
c4307285 | 1647 | * |
4ccfe5e0 | 1648 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1649 | * |
637b77fd | 1650 | * Return: the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1651 | */ |
1b784140 | 1652 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1653 | { |
4ccfe5e0 JPM |
1654 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1655 | return -EMSGSIZE; | |
b97bf3fd | 1656 | |
365ad353 | 1657 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1658 | } |
1659 | ||
dadebc00 | 1660 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1661 | */ |
301bae56 | 1662 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1663 | u32 peer_node) |
b97bf3fd | 1664 | { |
3721e9c7 YX |
1665 | struct sock *sk = &tsk->sk; |
1666 | struct net *net = sock_net(sk); | |
301bae56 | 1667 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1668 | |
25b9221b | 1669 | msg_set_syn(msg, 0); |
dadebc00 JPM |
1670 | msg_set_destnode(msg, peer_node); |
1671 | msg_set_destport(msg, peer_port); | |
1672 | msg_set_type(msg, TIPC_CONN_MSG); | |
1673 | msg_set_lookup_scope(msg, 0); | |
1674 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1675 | |
0d5fcebf | 1676 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1677 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d | 1678 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
f73b1281 | 1679 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid, true); |
60020e18 | 1680 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
c0bceb97 | 1681 | tsk_set_nagle(tsk); |
67879274 | 1682 | __skb_queue_purge(&sk->sk_write_queue); |
10724cc7 JPM |
1683 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1684 | return; | |
1685 | ||
1686 | /* Fall back to message based flow control */ | |
1687 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1688 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1689 | } |
1690 | ||
1691 | /** | |
31c82a2d | 1692 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1693 | * @m: descriptor for message info |
d8141208 | 1694 | * @skb: received message |
c4307285 | 1695 | * |
b97bf3fd PL |
1696 | * Note: Address is not captured if not requested by receiver. |
1697 | */ | |
31c82a2d | 1698 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1699 | { |
31c82a2d JM |
1700 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1701 | struct tipc_msg *hdr = buf_msg(skb); | |
1702 | ||
1703 | if (!srcaddr) | |
1704 | return; | |
1705 | ||
1706 | srcaddr->sock.family = AF_TIPC; | |
b6f88d9c | 1707 | srcaddr->sock.addrtype = TIPC_SOCKET_ADDR; |
09c8b971 | 1708 | srcaddr->sock.scope = 0; |
31c82a2d JM |
1709 | srcaddr->sock.addr.id.ref = msg_origport(hdr); |
1710 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1711 | srcaddr->sock.addr.name.domain = 0; | |
31c82a2d JM |
1712 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1713 | ||
1714 | if (!msg_in_group(hdr)) | |
1715 | return; | |
1716 | ||
1717 | /* Group message users may also want to know sending member's id */ | |
1718 | srcaddr->member.family = AF_TIPC; | |
b6f88d9c | 1719 | srcaddr->member.addrtype = TIPC_SERVICE_ADDR; |
09c8b971 | 1720 | srcaddr->member.scope = 0; |
31c82a2d JM |
1721 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); |
1722 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1723 | srcaddr->member.addr.name.domain = 0; | |
1724 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1725 | } |
1726 | ||
1727 | /** | |
301bae56 | 1728 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd | 1729 | * @m: descriptor for message info |
1c1274a5 | 1730 | * @skb: received message buffer |
301bae56 | 1731 | * @tsk: TIPC port associated with message |
c4307285 | 1732 | * |
b97bf3fd | 1733 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1734 | * |
637b77fd | 1735 | * Return: 0 if successful, otherwise errno |
b97bf3fd | 1736 | */ |
1c1274a5 | 1737 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct sk_buff *skb, |
301bae56 | 1738 | struct tipc_sock *tsk) |
b97bf3fd | 1739 | { |
62633c2f JM |
1740 | struct tipc_msg *hdr; |
1741 | u32 data[3] = {0,}; | |
1742 | bool has_addr; | |
1743 | int dlen, rc; | |
b97bf3fd PL |
1744 | |
1745 | if (likely(m->msg_controllen == 0)) | |
1746 | return 0; | |
1747 | ||
62633c2f JM |
1748 | hdr = buf_msg(skb); |
1749 | dlen = msg_data_sz(hdr); | |
1750 | ||
1751 | /* Capture errored message object, if any */ | |
1752 | if (msg_errcode(hdr)) { | |
1753 | if (skb_linearize(skb)) | |
1754 | return -ENOMEM; | |
1755 | hdr = buf_msg(skb); | |
1756 | data[0] = msg_errcode(hdr); | |
1757 | data[1] = dlen; | |
1758 | rc = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, data); | |
1759 | if (rc || !dlen) | |
1760 | return rc; | |
1761 | rc = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, dlen, msg_data(hdr)); | |
1762 | if (rc) | |
1763 | return rc; | |
b97bf3fd PL |
1764 | } |
1765 | ||
62633c2f JM |
1766 | /* Capture TIPC_SERVICE_ADDR/RANGE destination address, if any */ |
1767 | switch (msg_type(hdr)) { | |
b97bf3fd | 1768 | case TIPC_NAMED_MSG: |
62633c2f JM |
1769 | has_addr = true; |
1770 | data[0] = msg_nametype(hdr); | |
1771 | data[1] = msg_namelower(hdr); | |
1772 | data[2] = data[1]; | |
b97bf3fd PL |
1773 | break; |
1774 | case TIPC_MCAST_MSG: | |
62633c2f JM |
1775 | has_addr = true; |
1776 | data[0] = msg_nametype(hdr); | |
1777 | data[1] = msg_namelower(hdr); | |
1778 | data[2] = msg_nameupper(hdr); | |
b97bf3fd PL |
1779 | break; |
1780 | case TIPC_CONN_MSG: | |
62633c2f JM |
1781 | has_addr = !!tsk->conn_addrtype; |
1782 | data[0] = msg_nametype(&tsk->phdr); | |
1783 | data[1] = msg_nameinst(&tsk->phdr); | |
1784 | data[2] = data[1]; | |
b97bf3fd PL |
1785 | break; |
1786 | default: | |
62633c2f | 1787 | has_addr = false; |
2db9983a | 1788 | } |
62633c2f JM |
1789 | if (!has_addr) |
1790 | return 0; | |
1791 | return put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, data); | |
b97bf3fd PL |
1792 | } |
1793 | ||
c7268589 | 1794 | static struct sk_buff *tipc_sk_build_ack(struct tipc_sock *tsk) |
739f5e4e | 1795 | { |
d6fb7e9c | 1796 | struct sock *sk = &tsk->sk; |
a6ca1094 | 1797 | struct sk_buff *skb = NULL; |
739f5e4e | 1798 | struct tipc_msg *msg; |
301bae56 JPM |
1799 | u32 peer_port = tsk_peer_port(tsk); |
1800 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1801 | |
d6fb7e9c | 1802 | if (!tipc_sk_connected(sk)) |
c7268589 | 1803 | return NULL; |
c5898636 JPM |
1804 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1805 | dnode, tsk_own_node(tsk), peer_port, | |
1806 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1807 | if (!skb) |
c7268589 | 1808 | return NULL; |
a6ca1094 | 1809 | msg = buf_msg(skb); |
10724cc7 JPM |
1810 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1811 | tsk->rcv_unacked = 0; | |
1812 | ||
1813 | /* Adjust to and advertize the correct window limit */ | |
1814 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1815 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1816 | msg_set_adv_win(msg, tsk->rcv_win); | |
1817 | } | |
c7268589 TL |
1818 | return skb; |
1819 | } | |
1820 | ||
1821 | static void tipc_sk_send_ack(struct tipc_sock *tsk) | |
1822 | { | |
1823 | struct sk_buff *skb; | |
1824 | ||
1825 | skb = tipc_sk_build_ack(tsk); | |
1826 | if (!skb) | |
1827 | return; | |
1828 | ||
1829 | tipc_node_xmit_skb(sock_net(&tsk->sk), skb, tsk_peer_node(tsk), | |
1830 | msg_link_selector(buf_msg(skb))); | |
739f5e4e JPM |
1831 | } |
1832 | ||
85d3fc94 | 1833 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1834 | { |
1835 | struct sock *sk = sock->sk; | |
48766a58 | 1836 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
85d3fc94 | 1837 | long timeo = *timeop; |
4e0df495 PB |
1838 | int err = sock_error(sk); |
1839 | ||
1840 | if (err) | |
1841 | return err; | |
9bbb4ecc YX |
1842 | |
1843 | for (;;) { | |
fe8e4649 | 1844 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1845 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1846 | err = -ENOTCONN; |
1847 | break; | |
1848 | } | |
48766a58 | 1849 | add_wait_queue(sk_sleep(sk), &wait); |
9bbb4ecc | 1850 | release_sock(sk); |
48766a58 TN |
1851 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); |
1852 | sched_annotate_sleep(); | |
9bbb4ecc | 1853 | lock_sock(sk); |
48766a58 | 1854 | remove_wait_queue(sk_sleep(sk), &wait); |
9bbb4ecc YX |
1855 | } |
1856 | err = 0; | |
1857 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1858 | break; | |
9bbb4ecc YX |
1859 | err = -EAGAIN; |
1860 | if (!timeo) | |
1861 | break; | |
143fe22f EH |
1862 | err = sock_intr_errno(timeo); |
1863 | if (signal_pending(current)) | |
1864 | break; | |
4e0df495 PB |
1865 | |
1866 | err = sock_error(sk); | |
1867 | if (err) | |
1868 | break; | |
9bbb4ecc | 1869 | } |
85d3fc94 | 1870 | *timeop = timeo; |
9bbb4ecc YX |
1871 | return err; |
1872 | } | |
1873 | ||
c4307285 | 1874 | /** |
247f0f3c | 1875 | * tipc_recvmsg - receive packet-oriented message |
f172f4b8 | 1876 | * @sock: network socket |
b97bf3fd | 1877 | * @m: descriptor for message info |
e9f8b101 | 1878 | * @buflen: length of user buffer area |
b97bf3fd | 1879 | * @flags: receive flags |
c4307285 | 1880 | * |
b97bf3fd PL |
1881 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1882 | * If the complete message doesn't fit in user area, truncate it. | |
1883 | * | |
637b77fd | 1884 | * Return: size of returned message data, errno otherwise |
b97bf3fd | 1885 | */ |
e9f8b101 JPM |
1886 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1887 | size_t buflen, int flags) | |
b97bf3fd | 1888 | { |
0c3141e9 | 1889 | struct sock *sk = sock->sk; |
e9f8b101 | 1890 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1891 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1892 | int rc, err, hlen, dlen, copy; |
f4919ff5 | 1893 | struct tipc_skb_cb *skb_cb; |
b7d42635 | 1894 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1895 | struct tipc_msg *hdr; |
1896 | struct sk_buff *skb; | |
1897 | bool grp_evt; | |
e9f8b101 | 1898 | long timeout; |
b97bf3fd | 1899 | |
0c3141e9 | 1900 | /* Catch invalid receive requests */ |
e9f8b101 | 1901 | if (unlikely(!buflen)) |
b97bf3fd PL |
1902 | return -EINVAL; |
1903 | ||
0c3141e9 | 1904 | lock_sock(sk); |
e9f8b101 JPM |
1905 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1906 | rc = -ENOTCONN; | |
b97bf3fd PL |
1907 | goto exit; |
1908 | } | |
e9f8b101 | 1909 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1910 | |
b7d42635 | 1911 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1912 | do { |
e9f8b101 JPM |
1913 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1914 | if (unlikely(rc)) | |
1915 | goto exit; | |
1916 | skb = skb_peek(&sk->sk_receive_queue); | |
f4919ff5 | 1917 | skb_cb = TIPC_SKB_CB(skb); |
e9f8b101 JPM |
1918 | hdr = buf_msg(skb); |
1919 | dlen = msg_data_sz(hdr); | |
1920 | hlen = msg_hdr_sz(hdr); | |
1921 | err = msg_errcode(hdr); | |
ae236fb2 | 1922 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1923 | if (likely(dlen || err)) |
1924 | break; | |
2e84c60b | 1925 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1926 | } while (1); |
b97bf3fd | 1927 | |
e9f8b101 | 1928 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1929 | tipc_sk_set_orig_addr(m, skb); |
1c1274a5 | 1930 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
e9f8b101 | 1931 | if (unlikely(rc)) |
b97bf3fd | 1932 | goto exit; |
1c1274a5 | 1933 | hdr = buf_msg(skb); |
b97bf3fd | 1934 | |
e9f8b101 JPM |
1935 | /* Capture data if non-error msg, otherwise just set return value */ |
1936 | if (likely(!err)) { | |
f4919ff5 XL |
1937 | int offset = skb_cb->bytes_read; |
1938 | ||
1939 | copy = min_t(int, dlen - offset, buflen); | |
1940 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1941 | if (unlikely(rc)) | |
1942 | goto exit; | |
1943 | if (unlikely(offset + copy < dlen)) { | |
1944 | if (flags & MSG_EOR) { | |
1945 | if (!(flags & MSG_PEEK)) | |
1946 | skb_cb->bytes_read = offset + copy; | |
1947 | } else { | |
1948 | m->msg_flags |= MSG_TRUNC; | |
1949 | skb_cb->bytes_read = 0; | |
1950 | } | |
1951 | } else { | |
1952 | if (flags & MSG_EOR) | |
1953 | m->msg_flags |= MSG_EOR; | |
1954 | skb_cb->bytes_read = 0; | |
1955 | } | |
b97bf3fd | 1956 | } else { |
e9f8b101 JPM |
1957 | copy = 0; |
1958 | rc = 0; | |
f4919ff5 | 1959 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) { |
e9f8b101 | 1960 | rc = -ECONNRESET; |
f4919ff5 XL |
1961 | goto exit; |
1962 | } | |
b97bf3fd PL |
1963 | } |
1964 | ||
ae236fb2 JM |
1965 | /* Mark message as group event if applicable */ |
1966 | if (unlikely(grp_evt)) { | |
1967 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1968 | m->msg_flags |= MSG_EOR; | |
1969 | m->msg_flags |= MSG_OOB; | |
1970 | copy = 0; | |
1971 | } | |
1972 | ||
e9f8b101 | 1973 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1974 | if (unlikely(flags & MSG_PEEK)) |
1975 | goto exit; | |
1976 | ||
b7d42635 JM |
1977 | /* Send group flow control advertisement when applicable */ |
1978 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
e654f9f5 | 1979 | __skb_queue_head_init(&xmitq); |
b7d42635 JM |
1980 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), |
1981 | msg_orignode(hdr), msg_origport(hdr), | |
1982 | &xmitq); | |
1983 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1984 | } | |
1985 | ||
cc19862f XL |
1986 | if (skb_cb->bytes_read) |
1987 | goto exit; | |
1988 | ||
1989 | tsk_advance_rx_queue(sk); | |
ae236fb2 | 1990 | |
cc19862f | 1991 | if (likely(!connected)) |
e9f8b101 JPM |
1992 | goto exit; |
1993 | ||
b7d42635 | 1994 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1995 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1996 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1997 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1998 | exit: |
0c3141e9 | 1999 | release_sock(sk); |
e9f8b101 | 2000 | return rc ? rc : copy; |
b97bf3fd PL |
2001 | } |
2002 | ||
c4307285 | 2003 | /** |
ec8a09fb | 2004 | * tipc_recvstream - receive stream-oriented data |
f172f4b8 | 2005 | * @sock: network socket |
b97bf3fd | 2006 | * @m: descriptor for message info |
ec8a09fb | 2007 | * @buflen: total size of user buffer area |
b97bf3fd | 2008 | * @flags: receive flags |
c4307285 YH |
2009 | * |
2010 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
2011 | * will optionally wait for more; never truncates data. |
2012 | * | |
637b77fd | 2013 | * Return: size of returned message data, errno otherwise |
b97bf3fd | 2014 | */ |
ec8a09fb JPM |
2015 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
2016 | size_t buflen, int flags) | |
b97bf3fd | 2017 | { |
0c3141e9 | 2018 | struct sock *sk = sock->sk; |
58ed9442 | 2019 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
2020 | struct sk_buff *skb; |
2021 | struct tipc_msg *hdr; | |
2022 | struct tipc_skb_cb *skb_cb; | |
2023 | bool peek = flags & MSG_PEEK; | |
2024 | int offset, required, copy, copied = 0; | |
2025 | int hlen, dlen, err, rc; | |
2026 | long timeout; | |
b97bf3fd | 2027 | |
0c3141e9 | 2028 | /* Catch invalid receive attempts */ |
ec8a09fb | 2029 | if (unlikely(!buflen)) |
b97bf3fd PL |
2030 | return -EINVAL; |
2031 | ||
0c3141e9 | 2032 | lock_sock(sk); |
b97bf3fd | 2033 | |
438adcaf | 2034 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 2035 | rc = -ENOTCONN; |
9bbb4ecc | 2036 | goto exit; |
b97bf3fd | 2037 | } |
ec8a09fb JPM |
2038 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
2039 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 2040 | |
ec8a09fb JPM |
2041 | do { |
2042 | /* Look at first msg in receive queue; wait if necessary */ | |
2043 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
2044 | if (unlikely(rc)) | |
2045 | break; | |
2046 | skb = skb_peek(&sk->sk_receive_queue); | |
2047 | skb_cb = TIPC_SKB_CB(skb); | |
2048 | hdr = buf_msg(skb); | |
2049 | dlen = msg_data_sz(hdr); | |
2050 | hlen = msg_hdr_sz(hdr); | |
2051 | err = msg_errcode(hdr); | |
0232fd0a | 2052 | |
ec8a09fb JPM |
2053 | /* Discard any empty non-errored (SYN-) message */ |
2054 | if (unlikely(!dlen && !err)) { | |
2055 | tsk_advance_rx_queue(sk); | |
2056 | continue; | |
2057 | } | |
0232fd0a | 2058 | |
ec8a09fb JPM |
2059 | /* Collect msg meta data, incl. error code and rejected data */ |
2060 | if (!copied) { | |
31c82a2d | 2061 | tipc_sk_set_orig_addr(m, skb); |
1c1274a5 | 2062 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
ec8a09fb JPM |
2063 | if (rc) |
2064 | break; | |
1c1274a5 | 2065 | hdr = buf_msg(skb); |
ec8a09fb | 2066 | } |
b97bf3fd | 2067 | |
ec8a09fb JPM |
2068 | /* Copy data if msg ok, otherwise return error/partial data */ |
2069 | if (likely(!err)) { | |
2070 | offset = skb_cb->bytes_read; | |
2071 | copy = min_t(int, dlen - offset, buflen - copied); | |
2072 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
2073 | if (unlikely(rc)) | |
2074 | break; | |
2075 | copied += copy; | |
2076 | offset += copy; | |
2077 | if (unlikely(offset < dlen)) { | |
2078 | if (!peek) | |
2079 | skb_cb->bytes_read = offset; | |
2080 | break; | |
2081 | } | |
2082 | } else { | |
2083 | rc = 0; | |
2084 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
2085 | rc = -ECONNRESET; | |
2086 | if (copied || rc) | |
2087 | break; | |
b97bf3fd | 2088 | } |
b97bf3fd | 2089 | |
ec8a09fb JPM |
2090 | if (unlikely(peek)) |
2091 | break; | |
b97bf3fd | 2092 | |
ec8a09fb | 2093 | tsk_advance_rx_queue(sk); |
10724cc7 | 2094 | |
ec8a09fb JPM |
2095 | /* Send connection flow control advertisement when applicable */ |
2096 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
c7268589 | 2097 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) |
ec8a09fb | 2098 | tipc_sk_send_ack(tsk); |
b97bf3fd | 2099 | |
ec8a09fb JPM |
2100 | /* Exit if all requested data or FIN/error received */ |
2101 | if (copied == buflen || err) | |
2102 | break; | |
b97bf3fd | 2103 | |
ec8a09fb | 2104 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 2105 | exit: |
0c3141e9 | 2106 | release_sock(sk); |
ec8a09fb | 2107 | return copied ? copied : rc; |
b97bf3fd PL |
2108 | } |
2109 | ||
f288bef4 YX |
2110 | /** |
2111 | * tipc_write_space - wake up thread if port congestion is released | |
2112 | * @sk: socket | |
2113 | */ | |
2114 | static void tipc_write_space(struct sock *sk) | |
2115 | { | |
2116 | struct socket_wq *wq; | |
2117 | ||
2118 | rcu_read_lock(); | |
2119 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 2120 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
2121 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT | |
2122 | EPOLLWRNORM | EPOLLWRBAND); | |
f288bef4 YX |
2123 | rcu_read_unlock(); |
2124 | } | |
2125 | ||
2126 | /** | |
2127 | * tipc_data_ready - wake up threads to indicate messages have been received | |
2128 | * @sk: socket | |
f288bef4 | 2129 | */ |
676d2369 | 2130 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
2131 | { |
2132 | struct socket_wq *wq; | |
2133 | ||
40e0b090 PY |
2134 | trace_sk_data_ready(sk); |
2135 | ||
f288bef4 YX |
2136 | rcu_read_lock(); |
2137 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 2138 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
2139 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN | |
2140 | EPOLLRDNORM | EPOLLRDBAND); | |
f288bef4 YX |
2141 | rcu_read_unlock(); |
2142 | } | |
2143 | ||
f4195d1e YX |
2144 | static void tipc_sock_destruct(struct sock *sk) |
2145 | { | |
2146 | __skb_queue_purge(&sk->sk_receive_queue); | |
2147 | } | |
2148 | ||
64ac5f59 JM |
2149 | static void tipc_sk_proto_rcv(struct sock *sk, |
2150 | struct sk_buff_head *inputq, | |
2151 | struct sk_buff_head *xmitq) | |
2152 | { | |
2153 | struct sk_buff *skb = __skb_dequeue(inputq); | |
2154 | struct tipc_sock *tsk = tipc_sk(sk); | |
2155 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 2156 | struct tipc_group *grp = tsk->group; |
b7d42635 | 2157 | bool wakeup = false; |
64ac5f59 JM |
2158 | |
2159 | switch (msg_user(hdr)) { | |
2160 | case CONN_MANAGER: | |
e7eb0582 | 2161 | tipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq); |
64ac5f59 JM |
2162 | return; |
2163 | case SOCK_WAKEUP: | |
a80ae530 | 2164 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
bfd07f3d TN |
2165 | /* coupled with smp_rmb() in tipc_wait_for_cond() */ |
2166 | smp_wmb(); | |
64ac5f59 | 2167 | tsk->cong_link_cnt--; |
b7d42635 | 2168 | wakeup = true; |
0a3e060f | 2169 | tipc_sk_push_backlog(tsk, false); |
64ac5f59 | 2170 | break; |
75da2163 | 2171 | case GROUP_PROTOCOL: |
b7d42635 | 2172 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 2173 | break; |
64ac5f59 | 2174 | case TOP_SRV: |
b7d42635 | 2175 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
7ad32bcb | 2176 | hdr, inputq, xmitq); |
64ac5f59 JM |
2177 | break; |
2178 | default: | |
2179 | break; | |
2180 | } | |
2181 | ||
b7d42635 JM |
2182 | if (wakeup) |
2183 | sk->sk_write_space(sk); | |
2184 | ||
64ac5f59 JM |
2185 | kfree_skb(skb); |
2186 | } | |
2187 | ||
7e6c131e | 2188 | /** |
39fdc9c7 | 2189 | * tipc_sk_filter_connect - check incoming message for a connection-based socket |
58ed9442 | 2190 | * @tsk: TIPC socket |
39fdc9c7 | 2191 | * @skb: pointer to message buffer. |
c7268589 | 2192 | * @xmitq: for Nagle ACK if any |
637b77fd | 2193 | * Return: true if message should be added to receive queue, false otherwise |
7e6c131e | 2194 | */ |
c7268589 TL |
2195 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb, |
2196 | struct sk_buff_head *xmitq) | |
7e6c131e | 2197 | { |
58ed9442 | 2198 | struct sock *sk = &tsk->sk; |
f2f9800d | 2199 | struct net *net = sock_net(sk); |
cda3696d | 2200 | struct tipc_msg *hdr = buf_msg(skb); |
39fdc9c7 JM |
2201 | bool con_msg = msg_connected(hdr); |
2202 | u32 pport = tsk_peer_port(tsk); | |
2203 | u32 pnode = tsk_peer_node(tsk); | |
2204 | u32 oport = msg_origport(hdr); | |
2205 | u32 onode = msg_orignode(hdr); | |
2206 | int err = msg_errcode(hdr); | |
67879274 | 2207 | unsigned long delay; |
7e6c131e | 2208 | |
cda3696d JPM |
2209 | if (unlikely(msg_mcast(hdr))) |
2210 | return false; | |
c0bceb97 | 2211 | tsk->oneway = 0; |
7e6c131e | 2212 | |
99a20889 PB |
2213 | switch (sk->sk_state) { |
2214 | case TIPC_CONNECTING: | |
39fdc9c7 JM |
2215 | /* Setup ACK */ |
2216 | if (likely(con_msg)) { | |
2217 | if (err) | |
2218 | break; | |
2219 | tipc_sk_finish_conn(tsk, oport, onode); | |
2220 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
2221 | /* ACK+ message with data is added to receive queue */ | |
2222 | if (msg_data_sz(hdr)) | |
2223 | return true; | |
2224 | /* Empty ACK-, - wake up sleeping connect() and drop */ | |
ff946833 | 2225 | sk->sk_state_change(sk); |
39fdc9c7 JM |
2226 | msg_set_dest_droppable(hdr, 1); |
2227 | return false; | |
584d24b3 | 2228 | } |
39fdc9c7 JM |
2229 | /* Ignore connectionless message if not from listening socket */ |
2230 | if (oport != pport || onode != pnode) | |
2231 | return false; | |
584d24b3 | 2232 | |
67879274 TN |
2233 | /* Rejected SYN */ |
2234 | if (err != TIPC_ERR_OVERLOAD) | |
2235 | break; | |
2236 | ||
2237 | /* Prepare for new setup attempt if we have a SYN clone */ | |
2238 | if (skb_queue_empty(&sk->sk_write_queue)) | |
2239 | break; | |
2240 | get_random_bytes(&delay, 2); | |
2241 | delay %= (tsk->conn_timeout / 4); | |
2242 | delay = msecs_to_jiffies(delay + 100); | |
2243 | sk_reset_timer(sk, &sk->sk_timer, jiffies + delay); | |
2244 | return false; | |
438adcaf | 2245 | case TIPC_OPEN: |
9fd4b070 | 2246 | case TIPC_DISCONNECTING: |
39fdc9c7 | 2247 | return false; |
438adcaf | 2248 | case TIPC_LISTEN: |
7e6c131e | 2249 | /* Accept only SYN message */ |
25b9221b JM |
2250 | if (!msg_is_syn(hdr) && |
2251 | tipc_node_get_capabilities(net, onode) & TIPC_SYN_BIT) | |
2252 | return false; | |
39fdc9c7 | 2253 | if (!con_msg && !err) |
cda3696d | 2254 | return true; |
39fdc9c7 | 2255 | return false; |
f40acbaf | 2256 | case TIPC_ESTABLISHED: |
c0bceb97 | 2257 | if (!skb_queue_empty(&sk->sk_write_queue)) |
0a3e060f | 2258 | tipc_sk_push_backlog(tsk, false); |
f40acbaf | 2259 | /* Accept only connection-based messages sent by peer */ |
c7268589 TL |
2260 | if (likely(con_msg && !err && pport == oport && |
2261 | pnode == onode)) { | |
2262 | if (msg_ack_required(hdr)) { | |
2263 | struct sk_buff *skb; | |
2264 | ||
2265 | skb = tipc_sk_build_ack(tsk); | |
0a3e060f TL |
2266 | if (skb) { |
2267 | msg_set_nagle_ack(buf_msg(skb)); | |
c7268589 | 2268 | __skb_queue_tail(xmitq, skb); |
0a3e060f | 2269 | } |
c7268589 | 2270 | } |
39fdc9c7 | 2271 | return true; |
c7268589 | 2272 | } |
39fdc9c7 | 2273 | if (!tsk_peer_msg(tsk, hdr)) |
f40acbaf | 2274 | return false; |
39fdc9c7 JM |
2275 | if (!err) |
2276 | return true; | |
2277 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2278 | tipc_node_remove_conn(net, pnode, tsk->portid); | |
2279 | sk->sk_state_change(sk); | |
f40acbaf | 2280 | return true; |
7e6c131e | 2281 | default: |
438adcaf | 2282 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2283 | } |
39fdc9c7 JM |
2284 | /* Abort connection setup attempt */ |
2285 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2286 | sk->sk_err = ECONNREFUSED; | |
2287 | sk->sk_state_change(sk); | |
2288 | return true; | |
7e6c131e YX |
2289 | } |
2290 | ||
aba79f33 YX |
2291 | /** |
2292 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2293 | * @sk: socket | |
10724cc7 | 2294 | * @skb: message |
aba79f33 | 2295 | * |
10724cc7 JPM |
2296 | * For connection oriented messages, irrespective of importance, |
2297 | * default queue limit is 2 MB. | |
aba79f33 | 2298 | * |
10724cc7 JPM |
2299 | * For connectionless messages, queue limits are based on message |
2300 | * importance as follows: | |
aba79f33 | 2301 | * |
10724cc7 JPM |
2302 | * TIPC_LOW_IMPORTANCE (2 MB) |
2303 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2304 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2305 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 | 2306 | * |
637b77fd | 2307 | * Return: overload limit according to corresponding message importance |
aba79f33 | 2308 | */ |
10724cc7 | 2309 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2310 | { |
10724cc7 JPM |
2311 | struct tipc_sock *tsk = tipc_sk(sk); |
2312 | struct tipc_msg *hdr = buf_msg(skb); | |
2313 | ||
b7d42635 | 2314 | if (unlikely(msg_in_group(hdr))) |
8265792b | 2315 | return READ_ONCE(sk->sk_rcvbuf); |
b7d42635 | 2316 | |
10724cc7 | 2317 | if (unlikely(!msg_connected(hdr))) |
8265792b | 2318 | return READ_ONCE(sk->sk_rcvbuf) << msg_importance(hdr); |
aba79f33 | 2319 | |
10724cc7 | 2320 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
8265792b | 2321 | return READ_ONCE(sk->sk_rcvbuf); |
0cee6bbe | 2322 | |
10724cc7 | 2323 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2324 | } |
2325 | ||
c4307285 | 2326 | /** |
64ac5f59 | 2327 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2328 | * @sk: socket |
cda3696d | 2329 | * @skb: pointer to message. |
f172f4b8 | 2330 | * @xmitq: output message area (FIXME) |
c4307285 | 2331 | * |
0c3141e9 AS |
2332 | * Enqueues message on receive queue if acceptable; optionally handles |
2333 | * disconnect indication for a connected socket. | |
2334 | * | |
1186adf7 | 2335 | * Called with socket lock already taken |
b97bf3fd | 2336 | */ |
64ac5f59 JM |
2337 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2338 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2339 | { |
64ac5f59 | 2340 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2341 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2342 | struct tipc_group *grp = tsk->group; |
cda3696d | 2343 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2344 | struct net *net = sock_net(sk); |
2345 | struct sk_buff_head inputq; | |
77d5ad40 | 2346 | int mtyp = msg_type(hdr); |
64ac5f59 | 2347 | int limit, err = TIPC_OK; |
ec8a2e56 | 2348 | |
01e661eb | 2349 | trace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, " "); |
64ac5f59 JM |
2350 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2351 | __skb_queue_head_init(&inputq); | |
2352 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2353 | |
64ac5f59 JM |
2354 | if (unlikely(!msg_isdata(hdr))) |
2355 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2356 | |
75da2163 JM |
2357 | if (unlikely(grp)) |
2358 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2359 | ||
77d5ad40 | 2360 | if (unlikely(!grp) && mtyp == TIPC_MCAST_MSG) |
08e046c8 | 2361 | tipc_mcast_filter_msg(net, &tsk->mc_method.deferredq, &inputq); |
c55c8eda | 2362 | |
64ac5f59 JM |
2363 | /* Validate and add to receive buffer if there is space */ |
2364 | while ((skb = __skb_dequeue(&inputq))) { | |
2365 | hdr = buf_msg(skb); | |
2366 | limit = rcvbuf_limit(sk, skb); | |
c7268589 | 2367 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb, xmitq)) || |
75da2163 JM |
2368 | (!sk_conn && msg_connected(hdr)) || |
2369 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2370 | err = TIPC_ERR_NO_PORT; |
872619d8 | 2371 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) { |
01e661eb TL |
2372 | trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, |
2373 | "err_overload2!"); | |
872619d8 | 2374 | atomic_inc(&sk->sk_drops); |
64ac5f59 | 2375 | err = TIPC_ERR_OVERLOAD; |
872619d8 | 2376 | } |
b97bf3fd | 2377 | |
64ac5f59 | 2378 | if (unlikely(err)) { |
01e661eb TL |
2379 | if (tipc_msg_reverse(tipc_own_addr(net), &skb, err)) { |
2380 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, | |
2381 | "@filter_rcv!"); | |
2382 | __skb_queue_tail(xmitq, skb); | |
2383 | } | |
64ac5f59 JM |
2384 | err = TIPC_OK; |
2385 | continue; | |
2386 | } | |
2387 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
2388 | skb_set_owner_r(skb, sk); | |
01e661eb TL |
2389 | trace_tipc_sk_overlimit2(sk, skb, TIPC_DUMP_ALL, |
2390 | "rcvq >90% allocated!"); | |
64ac5f59 | 2391 | sk->sk_data_ready(sk); |
cda3696d | 2392 | } |
0c3141e9 | 2393 | } |
b97bf3fd | 2394 | |
0c3141e9 | 2395 | /** |
64ac5f59 | 2396 | * tipc_sk_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 2397 | * @sk: socket |
a6ca1094 | 2398 | * @skb: message |
0c3141e9 | 2399 | * |
e3a77561 | 2400 | * Caller must hold socket lock |
0c3141e9 | 2401 | */ |
64ac5f59 | 2402 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 2403 | { |
64ac5f59 | 2404 | unsigned int before = sk_rmem_alloc_get(sk); |
f1d048f2 | 2405 | struct sk_buff_head xmitq; |
64ac5f59 | 2406 | unsigned int added; |
0c3141e9 | 2407 | |
f1d048f2 JPM |
2408 | __skb_queue_head_init(&xmitq); |
2409 | ||
64ac5f59 JM |
2410 | tipc_sk_filter_rcv(sk, skb, &xmitq); |
2411 | added = sk_rmem_alloc_get(sk) - before; | |
2412 | atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt); | |
f1d048f2 | 2413 | |
64ac5f59 | 2414 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2415 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
0c3141e9 AS |
2416 | return 0; |
2417 | } | |
2418 | ||
d570d864 | 2419 | /** |
c637c103 JPM |
2420 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
2421 | * inputq and try adding them to socket or backlog queue | |
2422 | * @inputq: list of incoming buffers with potentially different destinations | |
2423 | * @sk: socket where the buffers should be enqueued | |
2424 | * @dport: port number for the socket | |
f172f4b8 | 2425 | * @xmitq: output queue |
d570d864 JPM |
2426 | * |
2427 | * Caller must hold socket lock | |
d570d864 | 2428 | */ |
cda3696d | 2429 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 2430 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 2431 | { |
f4bb62e6 | 2432 | unsigned long time_limit = jiffies + usecs_to_jiffies(20000); |
f1d048f2 | 2433 | struct sk_buff *skb; |
d570d864 JPM |
2434 | unsigned int lim; |
2435 | atomic_t *dcnt; | |
f1d048f2 | 2436 | u32 onode; |
c637c103 JPM |
2437 | |
2438 | while (skb_queue_len(inputq)) { | |
51a00daf | 2439 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
2440 | return; |
2441 | ||
c637c103 JPM |
2442 | skb = tipc_skb_dequeue(inputq, dport); |
2443 | if (unlikely(!skb)) | |
cda3696d JPM |
2444 | return; |
2445 | ||
2446 | /* Add message directly to receive queue if possible */ | |
c637c103 | 2447 | if (!sock_owned_by_user(sk)) { |
64ac5f59 | 2448 | tipc_sk_filter_rcv(sk, skb, xmitq); |
cda3696d | 2449 | continue; |
c637c103 | 2450 | } |
cda3696d JPM |
2451 | |
2452 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 2453 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 2454 | if (!sk->sk_backlog.len) |
c637c103 JPM |
2455 | atomic_set(dcnt, 0); |
2456 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
01e661eb TL |
2457 | if (likely(!sk_add_backlog(sk, skb, lim))) { |
2458 | trace_tipc_sk_overlimit1(sk, skb, TIPC_DUMP_ALL, | |
2459 | "bklg & rcvq >90% allocated!"); | |
c637c103 | 2460 | continue; |
01e661eb | 2461 | } |
cda3696d | 2462 | |
01e661eb | 2463 | trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, "err_overload!"); |
cda3696d | 2464 | /* Overload => reject message back to sender */ |
f1d048f2 | 2465 | onode = tipc_own_addr(sock_net(sk)); |
872619d8 | 2466 | atomic_inc(&sk->sk_drops); |
01e661eb TL |
2467 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) { |
2468 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_ALL, | |
2469 | "@sk_enqueue!"); | |
f1d048f2 | 2470 | __skb_queue_tail(xmitq, skb); |
01e661eb | 2471 | } |
cda3696d | 2472 | break; |
c637c103 | 2473 | } |
d570d864 JPM |
2474 | } |
2475 | ||
0c3141e9 | 2476 | /** |
c637c103 | 2477 | * tipc_sk_rcv - handle a chain of incoming buffers |
f172f4b8 | 2478 | * @net: the associated network namespace |
c637c103 JPM |
2479 | * @inputq: buffer list containing the buffers |
2480 | * Consumes all buffers in list until inputq is empty | |
2481 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2482 | */ |
cda3696d | 2483 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2484 | { |
f1d048f2 | 2485 | struct sk_buff_head xmitq; |
c637c103 | 2486 | u32 dnode, dport = 0; |
9871b27f | 2487 | int err; |
9816f061 | 2488 | struct tipc_sock *tsk; |
9816f061 | 2489 | struct sock *sk; |
cda3696d | 2490 | struct sk_buff *skb; |
9816f061 | 2491 | |
f1d048f2 | 2492 | __skb_queue_head_init(&xmitq); |
c637c103 | 2493 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2494 | dport = tipc_skb_peek_port(inputq, dport); |
2495 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2496 | |
c637c103 JPM |
2497 | if (likely(tsk)) { |
2498 | sk = &tsk->sk; | |
2499 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2500 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2501 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2502 | } |
f1d048f2 | 2503 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2504 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2505 | sock_put(sk); |
c637c103 | 2506 | continue; |
c637c103 | 2507 | } |
cda3696d JPM |
2508 | /* No destination socket => dequeue skb if still there */ |
2509 | skb = tipc_skb_dequeue(inputq, dport); | |
2510 | if (!skb) | |
2511 | return; | |
2512 | ||
2513 | /* Try secondary lookup if unresolved named message */ | |
2514 | err = TIPC_ERR_NO_PORT; | |
2515 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2516 | goto xmit; | |
2517 | ||
2518 | /* Prepare for message rejection */ | |
2519 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2520 | continue; |
01e661eb TL |
2521 | |
2522 | trace_tipc_sk_rej_msg(NULL, skb, TIPC_DUMP_NONE, "@sk_rcv!"); | |
e3a77561 | 2523 | xmit: |
cda3696d | 2524 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2525 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2526 | } |
b97bf3fd PL |
2527 | } |
2528 | ||
78eb3a53 YX |
2529 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2530 | { | |
d9dc8b0f | 2531 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2532 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2533 | int done; |
2534 | ||
2535 | do { | |
2536 | int err = sock_error(sk); | |
2537 | if (err) | |
2538 | return err; | |
2539 | if (!*timeo_p) | |
2540 | return -ETIMEDOUT; | |
2541 | if (signal_pending(current)) | |
2542 | return sock_intr_errno(*timeo_p); | |
5391a877 TL |
2543 | if (sk->sk_state == TIPC_DISCONNECTING) |
2544 | break; | |
78eb3a53 | 2545 | |
d9dc8b0f | 2546 | add_wait_queue(sk_sleep(sk), &wait); |
9546a0b7 TL |
2547 | done = sk_wait_event(sk, timeo_p, tipc_sk_connected(sk), |
2548 | &wait); | |
d9dc8b0f | 2549 | remove_wait_queue(sk_sleep(sk), &wait); |
78eb3a53 YX |
2550 | } while (!done); |
2551 | return 0; | |
2552 | } | |
2553 | ||
ea239314 EH |
2554 | static bool tipc_sockaddr_is_sane(struct sockaddr_tipc *addr) |
2555 | { | |
2556 | if (addr->family != AF_TIPC) | |
2557 | return false; | |
2558 | if (addr->addrtype == TIPC_SERVICE_RANGE) | |
2559 | return (addr->addr.nameseq.lower <= addr->addr.nameseq.upper); | |
2560 | return (addr->addrtype == TIPC_SERVICE_ADDR || | |
2561 | addr->addrtype == TIPC_SOCKET_ADDR); | |
2562 | } | |
2563 | ||
b97bf3fd | 2564 | /** |
247f0f3c | 2565 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2566 | * @sock: socket structure |
2567 | * @dest: socket address for destination port | |
2568 | * @destlen: size of socket address data structure | |
0c3141e9 | 2569 | * @flags: file-related flags associated with socket |
b97bf3fd | 2570 | * |
637b77fd | 2571 | * Return: 0 on success, errno otherwise |
b97bf3fd | 2572 | */ |
247f0f3c YX |
2573 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2574 | int destlen, int flags) | |
b97bf3fd | 2575 | { |
0c3141e9 | 2576 | struct sock *sk = sock->sk; |
f2f8036e | 2577 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2578 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2579 | struct msghdr m = {NULL,}; | |
f2f8036e | 2580 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2581 | int previous; |
f2f8036e | 2582 | int res = 0; |
b89741a0 | 2583 | |
23998835 JM |
2584 | if (destlen != sizeof(struct sockaddr_tipc)) |
2585 | return -EINVAL; | |
2586 | ||
0c3141e9 AS |
2587 | lock_sock(sk); |
2588 | ||
75da2163 JM |
2589 | if (tsk->group) { |
2590 | res = -EINVAL; | |
2591 | goto exit; | |
2592 | } | |
2593 | ||
23998835 JM |
2594 | if (dst->family == AF_UNSPEC) { |
2595 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2596 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2597 | res = -EINVAL; |
0c3141e9 AS |
2598 | goto exit; |
2599 | } | |
ea239314 | 2600 | if (!tipc_sockaddr_is_sane(dst)) { |
0c3141e9 | 2601 | res = -EINVAL; |
23998835 | 2602 | goto exit; |
ea239314 | 2603 | } |
23998835 JM |
2604 | /* DGRAM/RDM connect(), just save the destaddr */ |
2605 | if (tipc_sk_type_connectionless(sk)) { | |
2606 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 | 2607 | goto exit; |
ea239314 EH |
2608 | } else if (dst->addrtype == TIPC_SERVICE_RANGE) { |
2609 | res = -EINVAL; | |
2610 | goto exit; | |
0c3141e9 AS |
2611 | } |
2612 | ||
99a20889 | 2613 | previous = sk->sk_state; |
438adcaf PB |
2614 | |
2615 | switch (sk->sk_state) { | |
2616 | case TIPC_OPEN: | |
584d24b3 YX |
2617 | /* Send a 'SYN-' to destination */ |
2618 | m.msg_name = dest; | |
2619 | m.msg_namelen = destlen; | |
2620 | ||
2621 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2622 | * indicate send_msg() is never blocked. | |
2623 | */ | |
2624 | if (!timeout) | |
2625 | m.msg_flags = MSG_DONTWAIT; | |
2626 | ||
39a0295f | 2627 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2628 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2629 | goto exit; | |
2630 | ||
99a20889 | 2631 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2632 | * difference is that return value in non-blocking |
2633 | * case is EINPROGRESS, rather than EALREADY. | |
2634 | */ | |
2635 | res = -EINPROGRESS; | |
7f8901b7 | 2636 | fallthrough; |
99a20889 PB |
2637 | case TIPC_CONNECTING: |
2638 | if (!timeout) { | |
2639 | if (previous == TIPC_CONNECTING) | |
2640 | res = -EALREADY; | |
78eb3a53 | 2641 | goto exit; |
99a20889 | 2642 | } |
78eb3a53 YX |
2643 | timeout = msecs_to_jiffies(timeout); |
2644 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2645 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2646 | break; |
2647 | case TIPC_ESTABLISHED: | |
584d24b3 | 2648 | res = -EISCONN; |
f40acbaf PB |
2649 | break; |
2650 | default: | |
584d24b3 | 2651 | res = -EINVAL; |
f40acbaf | 2652 | } |
99a20889 | 2653 | |
0c3141e9 AS |
2654 | exit: |
2655 | release_sock(sk); | |
b89741a0 | 2656 | return res; |
b97bf3fd PL |
2657 | } |
2658 | ||
c4307285 | 2659 | /** |
247f0f3c | 2660 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2661 | * @sock: socket structure |
2662 | * @len: (unused) | |
c4307285 | 2663 | * |
637b77fd | 2664 | * Return: 0 on success, errno otherwise |
b97bf3fd | 2665 | */ |
247f0f3c | 2666 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2667 | { |
0c3141e9 AS |
2668 | struct sock *sk = sock->sk; |
2669 | int res; | |
2670 | ||
2671 | lock_sock(sk); | |
0c288c86 | 2672 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2673 | release_sock(sk); |
0c288c86 | 2674 | |
0c3141e9 | 2675 | return res; |
b97bf3fd PL |
2676 | } |
2677 | ||
6398e23c YX |
2678 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2679 | { | |
2680 | struct sock *sk = sock->sk; | |
d237a7f1 | 2681 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
6398e23c YX |
2682 | int err; |
2683 | ||
2684 | /* True wake-one mechanism for incoming connections: only | |
2685 | * one process gets woken up, not the 'whole herd'. | |
2686 | * Since we do not 'race & poll' for established sockets | |
2687 | * anymore, the common case will execute the loop only once. | |
2688 | */ | |
2689 | for (;;) { | |
fe8e4649 | 2690 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
d237a7f1 | 2691 | add_wait_queue(sk_sleep(sk), &wait); |
6398e23c | 2692 | release_sock(sk); |
d237a7f1 | 2693 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); |
6398e23c | 2694 | lock_sock(sk); |
d237a7f1 | 2695 | remove_wait_queue(sk_sleep(sk), &wait); |
6398e23c YX |
2696 | } |
2697 | err = 0; | |
2698 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2699 | break; | |
6398e23c YX |
2700 | err = -EAGAIN; |
2701 | if (!timeo) | |
2702 | break; | |
143fe22f EH |
2703 | err = sock_intr_errno(timeo); |
2704 | if (signal_pending(current)) | |
2705 | break; | |
6398e23c | 2706 | } |
6398e23c YX |
2707 | return err; |
2708 | } | |
2709 | ||
c4307285 | 2710 | /** |
247f0f3c | 2711 | * tipc_accept - wait for connection request |
b97bf3fd | 2712 | * @sock: listening socket |
d8141208 | 2713 | * @new_sock: new socket that is to be connected |
b97bf3fd | 2714 | * @flags: file-related flags associated with socket |
f172f4b8 | 2715 | * @kern: caused by kernel or by userspace? |
c4307285 | 2716 | * |
637b77fd | 2717 | * Return: 0 on success, errno otherwise |
b97bf3fd | 2718 | */ |
cdfbabfb DH |
2719 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2720 | bool kern) | |
b97bf3fd | 2721 | { |
0fef8f20 | 2722 | struct sock *new_sk, *sk = sock->sk; |
301bae56 | 2723 | struct tipc_sock *new_tsock; |
f8dd60de | 2724 | struct msghdr m = {NULL,}; |
0fef8f20 | 2725 | struct tipc_msg *msg; |
f8dd60de | 2726 | struct sk_buff *buf; |
6398e23c | 2727 | long timeo; |
0c3141e9 | 2728 | int res; |
b97bf3fd | 2729 | |
0c3141e9 | 2730 | lock_sock(sk); |
b97bf3fd | 2731 | |
0c288c86 | 2732 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2733 | res = -EINVAL; |
b97bf3fd PL |
2734 | goto exit; |
2735 | } | |
6398e23c YX |
2736 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2737 | res = tipc_wait_for_accept(sock, timeo); | |
2738 | if (res) | |
2739 | goto exit; | |
0c3141e9 AS |
2740 | |
2741 | buf = skb_peek(&sk->sk_receive_queue); | |
2742 | ||
cdfbabfb | 2743 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2744 | if (res) |
2745 | goto exit; | |
fdd75ea8 | 2746 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2747 | |
0fef8f20 | 2748 | new_sk = new_sock->sk; |
301bae56 | 2749 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2750 | msg = buf_msg(buf); |
b97bf3fd | 2751 | |
0fef8f20 PG |
2752 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2753 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2754 | ||
2755 | /* | |
2756 | * Reject any stray messages received by new socket | |
2757 | * before the socket lock was taken (very, very unlikely) | |
2758 | */ | |
49afb806 | 2759 | tsk_rej_rx_queue(new_sk, TIPC_ERR_NO_PORT); |
0fef8f20 PG |
2760 | |
2761 | /* Connect new socket to it's peer */ | |
301bae56 | 2762 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2763 | |
095ae612 | 2764 | tsk_set_importance(new_sk, msg_importance(msg)); |
0fef8f20 | 2765 | if (msg_named(msg)) { |
14623e00 JM |
2766 | new_tsock->conn_addrtype = TIPC_SERVICE_ADDR; |
2767 | msg_set_nametype(&new_tsock->phdr, msg_nametype(msg)); | |
2768 | msg_set_nameinst(&new_tsock->phdr, msg_nameinst(msg)); | |
b97bf3fd | 2769 | } |
0fef8f20 PG |
2770 | |
2771 | /* | |
f8dd60de XL |
2772 | * Respond to 'SYN-' by discarding it & returning 'ACK'. |
2773 | * Respond to 'SYN+' by queuing it on new socket & returning 'ACK'. | |
0fef8f20 PG |
2774 | */ |
2775 | if (!msg_data_sz(msg)) { | |
2e84c60b | 2776 | tsk_advance_rx_queue(sk); |
0fef8f20 PG |
2777 | } else { |
2778 | __skb_dequeue(&sk->sk_receive_queue); | |
2779 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2780 | skb_set_owner_r(buf, new_sk); |
0fef8f20 | 2781 | } |
f8dd60de | 2782 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 | 2783 | release_sock(new_sk); |
b97bf3fd | 2784 | exit: |
0c3141e9 | 2785 | release_sock(sk); |
b97bf3fd PL |
2786 | return res; |
2787 | } | |
2788 | ||
2789 | /** | |
247f0f3c | 2790 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2791 | * @sock: socket structure |
e247a8f5 | 2792 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2793 | * |
2794 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2795 | * |
637b77fd | 2796 | * Return: 0 on success, errno otherwise |
b97bf3fd | 2797 | */ |
247f0f3c | 2798 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2799 | { |
0c3141e9 | 2800 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2801 | int res; |
2802 | ||
e247a8f5 AS |
2803 | if (how != SHUT_RDWR) |
2804 | return -EINVAL; | |
b97bf3fd | 2805 | |
0c3141e9 | 2806 | lock_sock(sk); |
b97bf3fd | 2807 | |
01e661eb | 2808 | trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " "); |
6f00089c | 2809 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
a4b5cc9e | 2810 | sk->sk_shutdown = SHUTDOWN_MASK; |
b97bf3fd | 2811 | |
6f00089c | 2812 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2813 | /* Discard any unreceived messages */ |
57467e56 | 2814 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 | 2815 | |
b97bf3fd | 2816 | res = 0; |
6f00089c | 2817 | } else { |
b97bf3fd PL |
2818 | res = -ENOTCONN; |
2819 | } | |
2a63866c TH |
2820 | /* Wake up anyone sleeping in poll. */ |
2821 | sk->sk_state_change(sk); | |
b97bf3fd | 2822 | |
0c3141e9 | 2823 | release_sock(sk); |
b97bf3fd PL |
2824 | return res; |
2825 | } | |
2826 | ||
afe8792f JM |
2827 | static void tipc_sk_check_probing_state(struct sock *sk, |
2828 | struct sk_buff_head *list) | |
2829 | { | |
2830 | struct tipc_sock *tsk = tipc_sk(sk); | |
2831 | u32 pnode = tsk_peer_node(tsk); | |
2832 | u32 pport = tsk_peer_port(tsk); | |
2833 | u32 self = tsk_own_node(tsk); | |
2834 | u32 oport = tsk->portid; | |
2835 | struct sk_buff *skb; | |
2836 | ||
2837 | if (tsk->probe_unacked) { | |
2838 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2839 | sk->sk_err = ECONNABORTED; | |
2840 | tipc_node_remove_conn(sock_net(sk), pnode, pport); | |
2841 | sk->sk_state_change(sk); | |
2842 | return; | |
2843 | } | |
2844 | /* Prepare new probe */ | |
2845 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2846 | pnode, self, pport, oport, TIPC_OK); | |
2847 | if (skb) | |
2848 | __skb_queue_tail(list, skb); | |
2849 | tsk->probe_unacked = true; | |
2850 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); | |
2851 | } | |
2852 | ||
67879274 TN |
2853 | static void tipc_sk_retry_connect(struct sock *sk, struct sk_buff_head *list) |
2854 | { | |
2855 | struct tipc_sock *tsk = tipc_sk(sk); | |
2856 | ||
2857 | /* Try again later if dest link is congested */ | |
2858 | if (tsk->cong_link_cnt) { | |
6a7d8cff HL |
2859 | sk_reset_timer(sk, &sk->sk_timer, |
2860 | jiffies + msecs_to_jiffies(100)); | |
67879274 TN |
2861 | return; |
2862 | } | |
2863 | /* Prepare SYN for retransmit */ | |
2864 | tipc_msg_skb_clone(&sk->sk_write_queue, list); | |
2865 | } | |
2866 | ||
31b102bb | 2867 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2868 | { |
31b102bb KC |
2869 | struct sock *sk = from_timer(sk, t, sk_timer); |
2870 | struct tipc_sock *tsk = tipc_sk(sk); | |
afe8792f JM |
2871 | u32 pnode = tsk_peer_node(tsk); |
2872 | struct sk_buff_head list; | |
67879274 | 2873 | int rc = 0; |
57289015 | 2874 | |
e654f9f5 | 2875 | __skb_queue_head_init(&list); |
6c9808ce | 2876 | bh_lock_sock(sk); |
0d5fcebf JM |
2877 | |
2878 | /* Try again later if socket is busy */ | |
2879 | if (sock_owned_by_user(sk)) { | |
2880 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
afe8792f | 2881 | bh_unlock_sock(sk); |
91a4a3eb | 2882 | sock_put(sk); |
afe8792f | 2883 | return; |
57289015 | 2884 | } |
57289015 | 2885 | |
afe8792f JM |
2886 | if (sk->sk_state == TIPC_ESTABLISHED) |
2887 | tipc_sk_check_probing_state(sk, &list); | |
67879274 TN |
2888 | else if (sk->sk_state == TIPC_CONNECTING) |
2889 | tipc_sk_retry_connect(sk, &list); | |
afe8792f | 2890 | |
57289015 | 2891 | bh_unlock_sock(sk); |
afe8792f JM |
2892 | |
2893 | if (!skb_queue_empty(&list)) | |
67879274 | 2894 | rc = tipc_node_xmit(sock_net(sk), &list, pnode, tsk->portid); |
afe8792f | 2895 | |
67879274 TN |
2896 | /* SYN messages may cause link congestion */ |
2897 | if (rc == -ELINKCONG) { | |
2898 | tipc_dest_push(&tsk->cong_links, pnode, 0); | |
2899 | tsk->cong_link_cnt = 1; | |
2900 | } | |
07f6c4bc | 2901 | sock_put(sk); |
57289015 JPM |
2902 | } |
2903 | ||
50a3499a | 2904 | static int tipc_sk_publish(struct tipc_sock *tsk, struct tipc_uaddr *ua) |
0fc87aae | 2905 | { |
d6fb7e9c PB |
2906 | struct sock *sk = &tsk->sk; |
2907 | struct net *net = sock_net(sk); | |
50a3499a JM |
2908 | struct tipc_socket_addr skaddr; |
2909 | struct publication *p; | |
0fc87aae JPM |
2910 | u32 key; |
2911 | ||
d6fb7e9c | 2912 | if (tipc_sk_connected(sk)) |
0fc87aae | 2913 | return -EINVAL; |
07f6c4bc YX |
2914 | key = tsk->portid + tsk->pub_count + 1; |
2915 | if (key == tsk->portid) | |
0fc87aae | 2916 | return -EADDRINUSE; |
50a3499a JM |
2917 | skaddr.ref = tsk->portid; |
2918 | skaddr.node = tipc_own_addr(net); | |
2919 | p = tipc_nametbl_publish(net, ua, &skaddr, key); | |
2920 | if (unlikely(!p)) | |
0fc87aae JPM |
2921 | return -EINVAL; |
2922 | ||
50a3499a | 2923 | list_add(&p->binding_sock, &tsk->publications); |
301bae56 | 2924 | tsk->pub_count++; |
50a3499a | 2925 | tsk->published = true; |
0fc87aae JPM |
2926 | return 0; |
2927 | } | |
2928 | ||
2c98da07 | 2929 | static int tipc_sk_withdraw(struct tipc_sock *tsk, struct tipc_uaddr *ua) |
0fc87aae | 2930 | { |
f2f9800d | 2931 | struct net *net = sock_net(&tsk->sk); |
2c98da07 JM |
2932 | struct publication *safe, *p; |
2933 | struct tipc_uaddr _ua; | |
0fc87aae JPM |
2934 | int rc = -EINVAL; |
2935 | ||
998d3907 | 2936 | list_for_each_entry_safe(p, safe, &tsk->publications, binding_sock) { |
2c98da07 JM |
2937 | if (!ua) { |
2938 | tipc_uaddr(&_ua, TIPC_SERVICE_RANGE, p->scope, | |
2939 | p->sr.type, p->sr.lower, p->sr.upper); | |
2940 | tipc_nametbl_withdraw(net, &_ua, &p->sk, p->key); | |
2941 | continue; | |
0fc87aae | 2942 | } |
2c98da07 JM |
2943 | /* Unbind specific publication */ |
2944 | if (p->scope != ua->scope) | |
2945 | continue; | |
2946 | if (p->sr.type != ua->sr.type) | |
2947 | continue; | |
2948 | if (p->sr.lower != ua->sr.lower) | |
2949 | continue; | |
2950 | if (p->sr.upper != ua->sr.upper) | |
2951 | break; | |
2952 | tipc_nametbl_withdraw(net, ua, &p->sk, p->key); | |
0fc87aae | 2953 | rc = 0; |
2c98da07 | 2954 | break; |
0fc87aae | 2955 | } |
2c98da07 | 2956 | if (list_empty(&tsk->publications)) { |
301bae56 | 2957 | tsk->published = 0; |
2c98da07 JM |
2958 | rc = 0; |
2959 | } | |
0fc87aae JPM |
2960 | return rc; |
2961 | } | |
2962 | ||
5a9ee0be JPM |
2963 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2964 | * when we go from standalone to network mode. | |
2965 | */ | |
e05b31f4 | 2966 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2967 | { |
e05b31f4 | 2968 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2969 | struct rhashtable_iter iter; |
07f6c4bc | 2970 | struct tipc_sock *tsk; |
5a9ee0be | 2971 | struct tipc_msg *msg; |
5a9ee0be | 2972 | |
40f9f439 HX |
2973 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2974 | ||
2975 | do { | |
97a6ec4a | 2976 | rhashtable_walk_start(&iter); |
40f9f439 HX |
2977 | |
2978 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
15ef70e2 CW |
2979 | sock_hold(&tsk->sk); |
2980 | rhashtable_walk_stop(&iter); | |
2981 | lock_sock(&tsk->sk); | |
07f6c4bc | 2982 | msg = &tsk->phdr; |
23fd3eac JM |
2983 | msg_set_prevnode(msg, tipc_own_addr(net)); |
2984 | msg_set_orignode(msg, tipc_own_addr(net)); | |
15ef70e2 CW |
2985 | release_sock(&tsk->sk); |
2986 | rhashtable_walk_start(&iter); | |
2987 | sock_put(&tsk->sk); | |
07f6c4bc | 2988 | } |
97a6ec4a | 2989 | |
40f9f439 HX |
2990 | rhashtable_walk_stop(&iter); |
2991 | } while (tsk == ERR_PTR(-EAGAIN)); | |
bd583fe3 CW |
2992 | |
2993 | rhashtable_walk_exit(&iter); | |
5a9ee0be JPM |
2994 | } |
2995 | ||
e05b31f4 | 2996 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2997 | { |
e05b31f4 | 2998 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2999 | struct tipc_sock *tsk; |
808d90f9 | 3000 | |
07f6c4bc | 3001 | rcu_read_lock(); |
ab818362 | 3002 | tsk = rhashtable_lookup(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
3003 | if (tsk) |
3004 | sock_hold(&tsk->sk); | |
3005 | rcu_read_unlock(); | |
808d90f9 | 3006 | |
07f6c4bc | 3007 | return tsk; |
808d90f9 JPM |
3008 | } |
3009 | ||
07f6c4bc | 3010 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 3011 | { |
e05b31f4 YX |
3012 | struct sock *sk = &tsk->sk; |
3013 | struct net *net = sock_net(sk); | |
3014 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc | 3015 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
8032bf12 | 3016 | u32 portid = get_random_u32_below(remaining) + TIPC_MIN_PORT; |
808d90f9 | 3017 | |
07f6c4bc YX |
3018 | while (remaining--) { |
3019 | portid++; | |
3020 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
3021 | portid = TIPC_MIN_PORT; | |
3022 | tsk->portid = portid; | |
3023 | sock_hold(&tsk->sk); | |
6cca7289 HX |
3024 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
3025 | tsk_rht_params)) | |
07f6c4bc YX |
3026 | return 0; |
3027 | sock_put(&tsk->sk); | |
808d90f9 JPM |
3028 | } |
3029 | ||
07f6c4bc | 3030 | return -1; |
808d90f9 JPM |
3031 | } |
3032 | ||
07f6c4bc | 3033 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 3034 | { |
07f6c4bc | 3035 | struct sock *sk = &tsk->sk; |
e05b31f4 | 3036 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 3037 | |
6cca7289 | 3038 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 3039 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 3040 | __sock_put(sk); |
808d90f9 | 3041 | } |
808d90f9 JPM |
3042 | } |
3043 | ||
6cca7289 HX |
3044 | static const struct rhashtable_params tsk_rht_params = { |
3045 | .nelem_hint = 192, | |
3046 | .head_offset = offsetof(struct tipc_sock, node), | |
3047 | .key_offset = offsetof(struct tipc_sock, portid), | |
3048 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
3049 | .max_size = 1048576, |
3050 | .min_size = 256, | |
b5e2c150 | 3051 | .automatic_shrinking = true, |
6cca7289 HX |
3052 | }; |
3053 | ||
e05b31f4 | 3054 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 3055 | { |
e05b31f4 | 3056 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
3057 | |
3058 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
3059 | } |
3060 | ||
e05b31f4 | 3061 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 3062 | { |
e05b31f4 YX |
3063 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3064 | ||
07f6c4bc YX |
3065 | /* Wait for socket readers to complete */ |
3066 | synchronize_net(); | |
808d90f9 | 3067 | |
e05b31f4 | 3068 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
3069 | } |
3070 | ||
75da2163 JM |
3071 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
3072 | { | |
3073 | struct net *net = sock_net(&tsk->sk); | |
75da2163 JM |
3074 | struct tipc_group *grp = tsk->group; |
3075 | struct tipc_msg *hdr = &tsk->phdr; | |
50a3499a | 3076 | struct tipc_uaddr ua; |
75da2163 JM |
3077 | int rc; |
3078 | ||
3079 | if (mreq->type < TIPC_RESERVED_TYPES) | |
3080 | return -EACCES; | |
232d07b7 JM |
3081 | if (mreq->scope > TIPC_NODE_SCOPE) |
3082 | return -EINVAL; | |
50a3499a JM |
3083 | if (mreq->scope != TIPC_NODE_SCOPE) |
3084 | mreq->scope = TIPC_CLUSTER_SCOPE; | |
75da2163 JM |
3085 | if (grp) |
3086 | return -EACCES; | |
60c25306 | 3087 | grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open); |
75da2163 JM |
3088 | if (!grp) |
3089 | return -ENOMEM; | |
3090 | tsk->group = grp; | |
3091 | msg_set_lookup_scope(hdr, mreq->scope); | |
3092 | msg_set_nametype(hdr, mreq->type); | |
3093 | msg_set_dest_droppable(hdr, true); | |
50a3499a JM |
3094 | tipc_uaddr(&ua, TIPC_SERVICE_RANGE, mreq->scope, |
3095 | mreq->type, mreq->instance, mreq->instance); | |
6e44867b | 3096 | tipc_nametbl_build_group(net, grp, &ua); |
50a3499a | 3097 | rc = tipc_sk_publish(tsk, &ua); |
e233df01 | 3098 | if (rc) { |
75da2163 | 3099 | tipc_group_delete(net, grp); |
e233df01 | 3100 | tsk->group = NULL; |
febafc84 | 3101 | return rc; |
e233df01 | 3102 | } |
d12d2e12 | 3103 | /* Eliminate any risk that a broadcast overtakes sent JOINs */ |
399574d4 JM |
3104 | tsk->mc_method.rcast = true; |
3105 | tsk->mc_method.mandatory = true; | |
d12d2e12 | 3106 | tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf); |
75da2163 JM |
3107 | return rc; |
3108 | } | |
3109 | ||
3110 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
3111 | { | |
3112 | struct net *net = sock_net(&tsk->sk); | |
3113 | struct tipc_group *grp = tsk->group; | |
2c98da07 | 3114 | struct tipc_uaddr ua; |
75da2163 JM |
3115 | int scope; |
3116 | ||
3117 | if (!grp) | |
3118 | return -EINVAL; | |
2c98da07 JM |
3119 | ua.addrtype = TIPC_SERVICE_RANGE; |
3120 | tipc_group_self(grp, &ua.sr, &scope); | |
3121 | ua.scope = scope; | |
75da2163 JM |
3122 | tipc_group_delete(net, grp); |
3123 | tsk->group = NULL; | |
2c98da07 | 3124 | tipc_sk_withdraw(tsk, &ua); |
75da2163 JM |
3125 | return 0; |
3126 | } | |
3127 | ||
b97bf3fd | 3128 | /** |
247f0f3c | 3129 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
3130 | * @sock: socket structure |
3131 | * @lvl: option level | |
3132 | * @opt: option identifier | |
3133 | * @ov: pointer to new option value | |
3134 | * @ol: length of option value | |
c4307285 YH |
3135 | * |
3136 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 3137 | * (to ease compatibility). |
c4307285 | 3138 | * |
637b77fd | 3139 | * Return: 0 on success, errno otherwise |
b97bf3fd | 3140 | */ |
247f0f3c | 3141 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
a7b75c5a | 3142 | sockptr_t ov, unsigned int ol) |
b97bf3fd | 3143 | { |
0c3141e9 | 3144 | struct sock *sk = sock->sk; |
58ed9442 | 3145 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 3146 | struct tipc_group_req mreq; |
01fd12bb | 3147 | u32 value = 0; |
a08ef476 | 3148 | int res = 0; |
b97bf3fd | 3149 | |
c4307285 YH |
3150 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
3151 | return 0; | |
b97bf3fd PL |
3152 | if (lvl != SOL_TIPC) |
3153 | return -ENOPROTOOPT; | |
01fd12bb JPM |
3154 | |
3155 | switch (opt) { | |
3156 | case TIPC_IMPORTANCE: | |
3157 | case TIPC_SRC_DROPPABLE: | |
3158 | case TIPC_DEST_DROPPABLE: | |
3159 | case TIPC_CONN_TIMEOUT: | |
c0bceb97 | 3160 | case TIPC_NODELAY: |
01fd12bb JPM |
3161 | if (ol < sizeof(value)) |
3162 | return -EINVAL; | |
a7b75c5a | 3163 | if (copy_from_sockptr(&value, ov, sizeof(u32))) |
75da2163 JM |
3164 | return -EFAULT; |
3165 | break; | |
3166 | case TIPC_GROUP_JOIN: | |
3167 | if (ol < sizeof(mreq)) | |
3168 | return -EINVAL; | |
a7b75c5a | 3169 | if (copy_from_sockptr(&mreq, ov, sizeof(mreq))) |
75da2163 | 3170 | return -EFAULT; |
01fd12bb JPM |
3171 | break; |
3172 | default: | |
a7b75c5a | 3173 | if (!sockptr_is_null(ov) || ol) |
01fd12bb JPM |
3174 | return -EINVAL; |
3175 | } | |
b97bf3fd | 3176 | |
0c3141e9 | 3177 | lock_sock(sk); |
c4307285 | 3178 | |
b97bf3fd PL |
3179 | switch (opt) { |
3180 | case TIPC_IMPORTANCE: | |
095ae612 | 3181 | res = tsk_set_importance(sk, value); |
b97bf3fd PL |
3182 | break; |
3183 | case TIPC_SRC_DROPPABLE: | |
3184 | if (sock->type != SOCK_STREAM) | |
301bae56 | 3185 | tsk_set_unreliable(tsk, value); |
c4307285 | 3186 | else |
b97bf3fd PL |
3187 | res = -ENOPROTOOPT; |
3188 | break; | |
3189 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 3190 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
3191 | break; |
3192 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 3193 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 3194 | break; |
01fd12bb JPM |
3195 | case TIPC_MCAST_BROADCAST: |
3196 | tsk->mc_method.rcast = false; | |
3197 | tsk->mc_method.mandatory = true; | |
3198 | break; | |
3199 | case TIPC_MCAST_REPLICAST: | |
3200 | tsk->mc_method.rcast = true; | |
3201 | tsk->mc_method.mandatory = true; | |
3202 | break; | |
75da2163 JM |
3203 | case TIPC_GROUP_JOIN: |
3204 | res = tipc_sk_join(tsk, &mreq); | |
3205 | break; | |
3206 | case TIPC_GROUP_LEAVE: | |
3207 | res = tipc_sk_leave(tsk); | |
3208 | break; | |
c0bceb97 JM |
3209 | case TIPC_NODELAY: |
3210 | tsk->nodelay = !!value; | |
3211 | tsk_set_nagle(tsk); | |
3212 | break; | |
b97bf3fd PL |
3213 | default: |
3214 | res = -EINVAL; | |
3215 | } | |
3216 | ||
0c3141e9 AS |
3217 | release_sock(sk); |
3218 | ||
b97bf3fd PL |
3219 | return res; |
3220 | } | |
3221 | ||
3222 | /** | |
247f0f3c | 3223 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
3224 | * @sock: socket structure |
3225 | * @lvl: option level | |
3226 | * @opt: option identifier | |
3227 | * @ov: receptacle for option value | |
3228 | * @ol: receptacle for length of option value | |
c4307285 YH |
3229 | * |
3230 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 3231 | * (to ease compatibility). |
c4307285 | 3232 | * |
637b77fd | 3233 | * Return: 0 on success, errno otherwise |
b97bf3fd | 3234 | */ |
247f0f3c YX |
3235 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
3236 | char __user *ov, int __user *ol) | |
b97bf3fd | 3237 | { |
0c3141e9 | 3238 | struct sock *sk = sock->sk; |
58ed9442 | 3239 | struct tipc_sock *tsk = tipc_sk(sk); |
b6f88d9c | 3240 | struct tipc_service_range seq; |
75da2163 | 3241 | int len, scope; |
b97bf3fd | 3242 | u32 value; |
c4307285 | 3243 | int res; |
b97bf3fd | 3244 | |
c4307285 YH |
3245 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
3246 | return put_user(0, ol); | |
b97bf3fd PL |
3247 | if (lvl != SOL_TIPC) |
3248 | return -ENOPROTOOPT; | |
2db9983a AS |
3249 | res = get_user(len, ol); |
3250 | if (res) | |
c4307285 | 3251 | return res; |
b97bf3fd | 3252 | |
0c3141e9 | 3253 | lock_sock(sk); |
b97bf3fd PL |
3254 | |
3255 | switch (opt) { | |
3256 | case TIPC_IMPORTANCE: | |
301bae56 | 3257 | value = tsk_importance(tsk); |
b97bf3fd PL |
3258 | break; |
3259 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 3260 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
3261 | break; |
3262 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 3263 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
3264 | break; |
3265 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 3266 | value = tsk->conn_timeout; |
0c3141e9 | 3267 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 3268 | break; |
0e65967e | 3269 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 3270 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 3271 | break; |
0e65967e | 3272 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 3273 | value = skb_queue_len(&sk->sk_receive_queue); |
3274 | break; | |
42e5425a TN |
3275 | case TIPC_SOCK_RECVQ_USED: |
3276 | value = sk_rmem_alloc_get(sk); | |
3277 | break; | |
75da2163 JM |
3278 | case TIPC_GROUP_JOIN: |
3279 | seq.type = 0; | |
3280 | if (tsk->group) | |
3281 | tipc_group_self(tsk->group, &seq, &scope); | |
3282 | value = seq.type; | |
3283 | break; | |
b97bf3fd PL |
3284 | default: |
3285 | res = -EINVAL; | |
3286 | } | |
3287 | ||
0c3141e9 AS |
3288 | release_sock(sk); |
3289 | ||
25860c3b PG |
3290 | if (res) |
3291 | return res; /* "get" failed */ | |
b97bf3fd | 3292 | |
25860c3b PG |
3293 | if (len < sizeof(value)) |
3294 | return -EINVAL; | |
3295 | ||
3296 | if (copy_to_user(ov, &value, sizeof(value))) | |
3297 | return -EFAULT; | |
3298 | ||
3299 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
3300 | } |
3301 | ||
f2f9800d | 3302 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 3303 | { |
3e5cf362 JM |
3304 | struct net *net = sock_net(sock->sk); |
3305 | struct tipc_sioc_nodeid_req nr = {0}; | |
78acb1f9 EH |
3306 | struct tipc_sioc_ln_req lnr; |
3307 | void __user *argp = (void __user *)arg; | |
3308 | ||
3309 | switch (cmd) { | |
3310 | case SIOCGETLINKNAME: | |
3311 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
3312 | return -EFAULT; | |
3e5cf362 | 3313 | if (!tipc_node_get_linkname(net, |
f2f9800d | 3314 | lnr.bearer_id & 0xffff, lnr.peer, |
78acb1f9 EH |
3315 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
3316 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
3317 | return -EFAULT; | |
3318 | return 0; | |
3319 | } | |
3320 | return -EADDRNOTAVAIL; | |
3e5cf362 JM |
3321 | case SIOCGETNODEID: |
3322 | if (copy_from_user(&nr, argp, sizeof(nr))) | |
3323 | return -EFAULT; | |
3324 | if (!tipc_node_get_id(net, nr.peer, nr.node_id)) | |
3325 | return -EADDRNOTAVAIL; | |
3326 | if (copy_to_user(argp, &nr, sizeof(nr))) | |
3327 | return -EFAULT; | |
3328 | return 0; | |
78acb1f9 EH |
3329 | default: |
3330 | return -ENOIOCTLCMD; | |
3331 | } | |
3332 | } | |
3333 | ||
70b03759 EH |
3334 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
3335 | { | |
3336 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
3337 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
3338 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
3339 | ||
3340 | tsk1->peer.family = AF_TIPC; | |
b6f88d9c | 3341 | tsk1->peer.addrtype = TIPC_SOCKET_ADDR; |
66bc1e8d EH |
3342 | tsk1->peer.scope = TIPC_NODE_SCOPE; |
3343 | tsk1->peer.addr.id.ref = tsk2->portid; | |
3344 | tsk1->peer.addr.id.node = onode; | |
3345 | tsk2->peer.family = AF_TIPC; | |
b6f88d9c | 3346 | tsk2->peer.addrtype = TIPC_SOCKET_ADDR; |
66bc1e8d EH |
3347 | tsk2->peer.scope = TIPC_NODE_SCOPE; |
3348 | tsk2->peer.addr.id.ref = tsk1->portid; | |
3349 | tsk2->peer.addr.id.node = onode; | |
3350 | ||
3351 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
3352 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
3353 | return 0; |
3354 | } | |
3355 | ||
ae86b9e3 BH |
3356 | /* Protocol switches for the various types of TIPC sockets */ |
3357 | ||
bca65eae | 3358 | static const struct proto_ops msg_ops = { |
0e65967e | 3359 | .owner = THIS_MODULE, |
b97bf3fd | 3360 | .family = AF_TIPC, |
247f0f3c YX |
3361 | .release = tipc_release, |
3362 | .bind = tipc_bind, | |
3363 | .connect = tipc_connect, | |
66bc1e8d | 3364 | .socketpair = tipc_socketpair, |
245f3d34 | 3365 | .accept = sock_no_accept, |
247f0f3c | 3366 | .getname = tipc_getname, |
a11e1d43 | 3367 | .poll = tipc_poll, |
78acb1f9 | 3368 | .ioctl = tipc_ioctl, |
245f3d34 | 3369 | .listen = sock_no_listen, |
247f0f3c YX |
3370 | .shutdown = tipc_shutdown, |
3371 | .setsockopt = tipc_setsockopt, | |
3372 | .getsockopt = tipc_getsockopt, | |
3373 | .sendmsg = tipc_sendmsg, | |
3374 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3375 | .mmap = sock_no_mmap, |
3376 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3377 | }; |
3378 | ||
bca65eae | 3379 | static const struct proto_ops packet_ops = { |
0e65967e | 3380 | .owner = THIS_MODULE, |
b97bf3fd | 3381 | .family = AF_TIPC, |
247f0f3c YX |
3382 | .release = tipc_release, |
3383 | .bind = tipc_bind, | |
3384 | .connect = tipc_connect, | |
70b03759 | 3385 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3386 | .accept = tipc_accept, |
3387 | .getname = tipc_getname, | |
a11e1d43 | 3388 | .poll = tipc_poll, |
78acb1f9 | 3389 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3390 | .listen = tipc_listen, |
3391 | .shutdown = tipc_shutdown, | |
3392 | .setsockopt = tipc_setsockopt, | |
3393 | .getsockopt = tipc_getsockopt, | |
3394 | .sendmsg = tipc_send_packet, | |
3395 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3396 | .mmap = sock_no_mmap, |
3397 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3398 | }; |
3399 | ||
bca65eae | 3400 | static const struct proto_ops stream_ops = { |
0e65967e | 3401 | .owner = THIS_MODULE, |
b97bf3fd | 3402 | .family = AF_TIPC, |
247f0f3c YX |
3403 | .release = tipc_release, |
3404 | .bind = tipc_bind, | |
3405 | .connect = tipc_connect, | |
70b03759 | 3406 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3407 | .accept = tipc_accept, |
3408 | .getname = tipc_getname, | |
a11e1d43 | 3409 | .poll = tipc_poll, |
78acb1f9 | 3410 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3411 | .listen = tipc_listen, |
3412 | .shutdown = tipc_shutdown, | |
3413 | .setsockopt = tipc_setsockopt, | |
3414 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3415 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3416 | .recvmsg = tipc_recvstream, |
8238745a YH |
3417 | .mmap = sock_no_mmap, |
3418 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3419 | }; |
3420 | ||
bca65eae | 3421 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3422 | .owner = THIS_MODULE, |
b97bf3fd | 3423 | .family = AF_TIPC, |
c5fa7b3c | 3424 | .create = tipc_sk_create |
b97bf3fd PL |
3425 | }; |
3426 | ||
3427 | static struct proto tipc_proto = { | |
3428 | .name = "TIPC", | |
3429 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3430 | .obj_size = sizeof(struct tipc_sock), |
3431 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3432 | }; |
3433 | ||
3434 | /** | |
4323add6 | 3435 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3436 | * |
637b77fd | 3437 | * Return: 0 on success, errno otherwise |
b97bf3fd | 3438 | */ |
4323add6 | 3439 | int tipc_socket_init(void) |
b97bf3fd PL |
3440 | { |
3441 | int res; | |
3442 | ||
c4307285 | 3443 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3444 | if (res) { |
2cf8aa19 | 3445 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3446 | goto out; |
3447 | } | |
3448 | ||
3449 | res = sock_register(&tipc_family_ops); | |
3450 | if (res) { | |
2cf8aa19 | 3451 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3452 | proto_unregister(&tipc_proto); |
3453 | goto out; | |
3454 | } | |
b97bf3fd PL |
3455 | out: |
3456 | return res; | |
3457 | } | |
3458 | ||
3459 | /** | |
4323add6 | 3460 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3461 | */ |
4323add6 | 3462 | void tipc_socket_stop(void) |
b97bf3fd | 3463 | { |
b97bf3fd PL |
3464 | sock_unregister(tipc_family_ops.family); |
3465 | proto_unregister(&tipc_proto); | |
3466 | } | |
34b78a12 RA |
3467 | |
3468 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3469 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 | 3470 | { |
14623e00 JM |
3471 | u32 peer_node, peer_port; |
3472 | u32 conn_type, conn_instance; | |
34b78a12 RA |
3473 | struct nlattr *nest; |
3474 | ||
3475 | peer_node = tsk_peer_node(tsk); | |
3476 | peer_port = tsk_peer_port(tsk); | |
14623e00 JM |
3477 | conn_type = msg_nametype(&tsk->phdr); |
3478 | conn_instance = msg_nameinst(&tsk->phdr); | |
ae0be8de | 3479 | nest = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_CON); |
517ccc2a KL |
3480 | if (!nest) |
3481 | return -EMSGSIZE; | |
34b78a12 RA |
3482 | |
3483 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3484 | goto msg_full; | |
3485 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3486 | goto msg_full; | |
3487 | ||
14623e00 | 3488 | if (tsk->conn_addrtype != 0) { |
34b78a12 RA |
3489 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) |
3490 | goto msg_full; | |
14623e00 | 3491 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, conn_type)) |
34b78a12 | 3492 | goto msg_full; |
14623e00 | 3493 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, conn_instance)) |
34b78a12 RA |
3494 | goto msg_full; |
3495 | } | |
3496 | nla_nest_end(skb, nest); | |
3497 | ||
3498 | return 0; | |
3499 | ||
3500 | msg_full: | |
3501 | nla_nest_cancel(skb, nest); | |
3502 | ||
3503 | return -EMSGSIZE; | |
3504 | } | |
3505 | ||
dfde331e GM |
3506 | static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock |
3507 | *tsk) | |
3508 | { | |
3509 | struct net *net = sock_net(skb->sk); | |
dfde331e GM |
3510 | struct sock *sk = &tsk->sk; |
3511 | ||
3512 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) || | |
23fd3eac | 3513 | nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr(net))) |
dfde331e GM |
3514 | return -EMSGSIZE; |
3515 | ||
3516 | if (tipc_sk_connected(sk)) { | |
3517 | if (__tipc_nl_add_sk_con(skb, tsk)) | |
3518 | return -EMSGSIZE; | |
3519 | } else if (!list_empty(&tsk->publications)) { | |
3520 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3521 | return -EMSGSIZE; | |
3522 | } | |
3523 | return 0; | |
3524 | } | |
3525 | ||
34b78a12 | 3526 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3527 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3528 | struct tipc_sock *tsk) | |
34b78a12 | 3529 | { |
34b78a12 | 3530 | struct nlattr *attrs; |
dfde331e | 3531 | void *hdr; |
34b78a12 RA |
3532 | |
3533 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3534 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3535 | if (!hdr) |
3536 | goto msg_cancel; | |
3537 | ||
ae0be8de | 3538 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK); |
34b78a12 RA |
3539 | if (!attrs) |
3540 | goto genlmsg_cancel; | |
dfde331e GM |
3541 | |
3542 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
34b78a12 RA |
3543 | goto attr_msg_cancel; |
3544 | ||
34b78a12 RA |
3545 | nla_nest_end(skb, attrs); |
3546 | genlmsg_end(skb, hdr); | |
3547 | ||
3548 | return 0; | |
3549 | ||
3550 | attr_msg_cancel: | |
3551 | nla_nest_cancel(skb, attrs); | |
3552 | genlmsg_cancel: | |
3553 | genlmsg_cancel(skb, hdr); | |
3554 | msg_cancel: | |
3555 | return -EMSGSIZE; | |
3556 | } | |
3557 | ||
c30b70de GM |
3558 | int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, |
3559 | int (*skb_handler)(struct sk_buff *skb, | |
3560 | struct netlink_callback *cb, | |
3561 | struct tipc_sock *tsk)) | |
34b78a12 | 3562 | { |
8f5c5fcf | 3563 | struct rhashtable_iter *iter = (void *)cb->args[4]; |
dfde331e GM |
3564 | struct tipc_sock *tsk; |
3565 | int err; | |
34b78a12 | 3566 | |
9a07efa9 CW |
3567 | rhashtable_walk_start(iter); |
3568 | while ((tsk = rhashtable_walk_next(iter)) != NULL) { | |
3569 | if (IS_ERR(tsk)) { | |
3570 | err = PTR_ERR(tsk); | |
3571 | if (err == -EAGAIN) { | |
3572 | err = 0; | |
d6e164e3 RA |
3573 | continue; |
3574 | } | |
9a07efa9 CW |
3575 | break; |
3576 | } | |
d6e164e3 | 3577 | |
9a07efa9 CW |
3578 | sock_hold(&tsk->sk); |
3579 | rhashtable_walk_stop(iter); | |
3580 | lock_sock(&tsk->sk); | |
3581 | err = skb_handler(skb, cb, tsk); | |
3582 | if (err) { | |
3583 | release_sock(&tsk->sk); | |
3584 | sock_put(&tsk->sk); | |
3585 | goto out; | |
07f6c4bc | 3586 | } |
9a07efa9 CW |
3587 | release_sock(&tsk->sk); |
3588 | rhashtable_walk_start(iter); | |
3589 | sock_put(&tsk->sk); | |
34b78a12 | 3590 | } |
9a07efa9 | 3591 | rhashtable_walk_stop(iter); |
d6e164e3 | 3592 | out: |
34b78a12 RA |
3593 | return skb->len; |
3594 | } | |
c30b70de GM |
3595 | EXPORT_SYMBOL(tipc_nl_sk_walk); |
3596 | ||
9a07efa9 CW |
3597 | int tipc_dump_start(struct netlink_callback *cb) |
3598 | { | |
8f5c5fcf CW |
3599 | return __tipc_dump_start(cb, sock_net(cb->skb->sk)); |
3600 | } | |
3601 | EXPORT_SYMBOL(tipc_dump_start); | |
3602 | ||
3603 | int __tipc_dump_start(struct netlink_callback *cb, struct net *net) | |
3604 | { | |
3605 | /* tipc_nl_name_table_dump() uses cb->args[0...3]. */ | |
3606 | struct rhashtable_iter *iter = (void *)cb->args[4]; | |
9a07efa9 CW |
3607 | struct tipc_net *tn = tipc_net(net); |
3608 | ||
3609 | if (!iter) { | |
3610 | iter = kmalloc(sizeof(*iter), GFP_KERNEL); | |
3611 | if (!iter) | |
3612 | return -ENOMEM; | |
3613 | ||
8f5c5fcf | 3614 | cb->args[4] = (long)iter; |
9a07efa9 CW |
3615 | } |
3616 | ||
3617 | rhashtable_walk_enter(&tn->sk_rht, iter); | |
3618 | return 0; | |
3619 | } | |
9a07efa9 CW |
3620 | |
3621 | int tipc_dump_done(struct netlink_callback *cb) | |
3622 | { | |
8f5c5fcf | 3623 | struct rhashtable_iter *hti = (void *)cb->args[4]; |
9a07efa9 CW |
3624 | |
3625 | rhashtable_walk_exit(hti); | |
3626 | kfree(hti); | |
3627 | return 0; | |
3628 | } | |
3629 | EXPORT_SYMBOL(tipc_dump_done); | |
3630 | ||
e41f0548 CW |
3631 | int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct netlink_callback *cb, |
3632 | struct tipc_sock *tsk, u32 sk_filter_state, | |
c30b70de GM |
3633 | u64 (*tipc_diag_gen_cookie)(struct sock *sk)) |
3634 | { | |
3635 | struct sock *sk = &tsk->sk; | |
3636 | struct nlattr *attrs; | |
3637 | struct nlattr *stat; | |
3638 | ||
3639 | /*filter response w.r.t sk_state*/ | |
3640 | if (!(sk_filter_state & (1 << sk->sk_state))) | |
3641 | return 0; | |
3642 | ||
ae0be8de | 3643 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK); |
c30b70de GM |
3644 | if (!attrs) |
3645 | goto msg_cancel; | |
3646 | ||
3647 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
3648 | goto attr_msg_cancel; | |
3649 | ||
3650 | if (nla_put_u32(skb, TIPC_NLA_SOCK_TYPE, (u32)sk->sk_type) || | |
3651 | nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) || | |
3652 | nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) || | |
3653 | nla_put_u32(skb, TIPC_NLA_SOCK_UID, | |
e41f0548 | 3654 | from_kuid_munged(sk_user_ns(NETLINK_CB(cb->skb).sk), |
4b2e6877 | 3655 | sock_i_uid(sk))) || |
c30b70de GM |
3656 | nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE, |
3657 | tipc_diag_gen_cookie(sk), | |
3658 | TIPC_NLA_SOCK_PAD)) | |
3659 | goto attr_msg_cancel; | |
3660 | ||
ae0be8de | 3661 | stat = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_STAT); |
c30b70de GM |
3662 | if (!stat) |
3663 | goto attr_msg_cancel; | |
3664 | ||
3665 | if (nla_put_u32(skb, TIPC_NLA_SOCK_STAT_RCVQ, | |
3666 | skb_queue_len(&sk->sk_receive_queue)) || | |
3667 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ, | |
872619d8 GM |
3668 | skb_queue_len(&sk->sk_write_queue)) || |
3669 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP, | |
3670 | atomic_read(&sk->sk_drops))) | |
c30b70de GM |
3671 | goto stat_msg_cancel; |
3672 | ||
3673 | if (tsk->cong_link_cnt && | |
3674 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_LINK_CONG)) | |
3675 | goto stat_msg_cancel; | |
3676 | ||
3677 | if (tsk_conn_cong(tsk) && | |
3678 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_CONN_CONG)) | |
3679 | goto stat_msg_cancel; | |
3680 | ||
3681 | nla_nest_end(skb, stat); | |
a1be5a20 GM |
3682 | |
3683 | if (tsk->group) | |
3684 | if (tipc_group_fill_sock_diag(tsk->group, skb)) | |
3685 | goto stat_msg_cancel; | |
3686 | ||
c30b70de GM |
3687 | nla_nest_end(skb, attrs); |
3688 | ||
3689 | return 0; | |
3690 | ||
3691 | stat_msg_cancel: | |
3692 | nla_nest_cancel(skb, stat); | |
3693 | attr_msg_cancel: | |
3694 | nla_nest_cancel(skb, attrs); | |
3695 | msg_cancel: | |
3696 | return -EMSGSIZE; | |
3697 | } | |
3698 | EXPORT_SYMBOL(tipc_sk_fill_sock_diag); | |
1a1a143d | 3699 | |
dfde331e GM |
3700 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
3701 | { | |
c30b70de | 3702 | return tipc_nl_sk_walk(skb, cb, __tipc_nl_add_sk); |
dfde331e GM |
3703 | } |
3704 | ||
1a1a143d | 3705 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3706 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3707 | struct netlink_callback *cb, | |
3708 | struct publication *publ) | |
1a1a143d RA |
3709 | { |
3710 | void *hdr; | |
3711 | struct nlattr *attrs; | |
3712 | ||
3713 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3714 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3715 | if (!hdr) |
3716 | goto msg_cancel; | |
3717 | ||
ae0be8de | 3718 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_PUBL); |
1a1a143d RA |
3719 | if (!attrs) |
3720 | goto genlmsg_cancel; | |
3721 | ||
3722 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3723 | goto attr_msg_cancel; | |
998d3907 | 3724 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->sr.type)) |
1a1a143d | 3725 | goto attr_msg_cancel; |
998d3907 | 3726 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->sr.lower)) |
1a1a143d | 3727 | goto attr_msg_cancel; |
998d3907 | 3728 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->sr.upper)) |
1a1a143d RA |
3729 | goto attr_msg_cancel; |
3730 | ||
3731 | nla_nest_end(skb, attrs); | |
3732 | genlmsg_end(skb, hdr); | |
3733 | ||
3734 | return 0; | |
3735 | ||
3736 | attr_msg_cancel: | |
3737 | nla_nest_cancel(skb, attrs); | |
3738 | genlmsg_cancel: | |
3739 | genlmsg_cancel(skb, hdr); | |
3740 | msg_cancel: | |
3741 | return -EMSGSIZE; | |
3742 | } | |
3743 | ||
3744 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3745 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3746 | struct netlink_callback *cb, | |
3747 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3748 | { |
3749 | int err; | |
3750 | struct publication *p; | |
3751 | ||
3752 | if (*last_publ) { | |
e50e73e1 | 3753 | list_for_each_entry(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3754 | if (p->key == *last_publ) |
3755 | break; | |
3756 | } | |
a1f8fec4 | 3757 | if (list_entry_is_head(p, &tsk->publications, binding_sock)) { |
1a1a143d RA |
3758 | /* We never set seq or call nl_dump_check_consistent() |
3759 | * this means that setting prev_seq here will cause the | |
3760 | * consistence check to fail in the netlink callback | |
3761 | * handler. Resulting in the last NLMSG_DONE message | |
3762 | * having the NLM_F_DUMP_INTR flag set. | |
3763 | */ | |
3764 | cb->prev_seq = 1; | |
3765 | *last_publ = 0; | |
3766 | return -EPIPE; | |
3767 | } | |
3768 | } else { | |
3769 | p = list_first_entry(&tsk->publications, struct publication, | |
e50e73e1 | 3770 | binding_sock); |
1a1a143d RA |
3771 | } |
3772 | ||
e50e73e1 | 3773 | list_for_each_entry_from(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3774 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
3775 | if (err) { | |
3776 | *last_publ = p->key; | |
3777 | return err; | |
3778 | } | |
3779 | } | |
3780 | *last_publ = 0; | |
3781 | ||
3782 | return 0; | |
3783 | } | |
3784 | ||
3785 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3786 | { | |
3787 | int err; | |
07f6c4bc | 3788 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3789 | u32 last_publ = cb->args[1]; |
3790 | u32 done = cb->args[2]; | |
e05b31f4 | 3791 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3792 | struct tipc_sock *tsk; |
3793 | ||
07f6c4bc | 3794 | if (!tsk_portid) { |
057af707 | 3795 | struct nlattr **attrs = genl_dumpit_info(cb)->attrs; |
1a1a143d RA |
3796 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; |
3797 | ||
45e093ae RA |
3798 | if (!attrs[TIPC_NLA_SOCK]) |
3799 | return -EINVAL; | |
3800 | ||
8cb08174 JB |
3801 | err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, |
3802 | attrs[TIPC_NLA_SOCK], | |
3803 | tipc_nl_sock_policy, NULL); | |
1a1a143d RA |
3804 | if (err) |
3805 | return err; | |
3806 | ||
3807 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3808 | return -EINVAL; | |
3809 | ||
07f6c4bc | 3810 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3811 | } |
3812 | ||
3813 | if (done) | |
3814 | return 0; | |
3815 | ||
e05b31f4 | 3816 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3817 | if (!tsk) |
3818 | return -EINVAL; | |
3819 | ||
3820 | lock_sock(&tsk->sk); | |
3821 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3822 | if (!err) | |
3823 | done = 1; | |
3824 | release_sock(&tsk->sk); | |
07f6c4bc | 3825 | sock_put(&tsk->sk); |
1a1a143d | 3826 | |
07f6c4bc | 3827 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3828 | cb->args[1] = last_publ; |
3829 | cb->args[2] = done; | |
3830 | ||
3831 | return skb->len; | |
3832 | } | |
b4b9771b | 3833 | |
01e661eb TL |
3834 | /** |
3835 | * tipc_sk_filtering - check if a socket should be traced | |
3836 | * @sk: the socket to be examined | |
f172f4b8 RD |
3837 | * |
3838 | * @sysctl_tipc_sk_filter is used as the socket tuple for filtering: | |
5fcb7d47 | 3839 | * (portid, sock type, name type, name lower, name upper) |
01e661eb | 3840 | * |
637b77fd | 3841 | * Return: true if the socket meets the socket tuple data |
01e661eb TL |
3842 | * (value 0 = 'any') or when there is no tuple set (all = 0), |
3843 | * otherwise false | |
3844 | */ | |
3845 | bool tipc_sk_filtering(struct sock *sk) | |
3846 | { | |
3847 | struct tipc_sock *tsk; | |
3848 | struct publication *p; | |
3849 | u32 _port, _sktype, _type, _lower, _upper; | |
3850 | u32 type = 0, lower = 0, upper = 0; | |
3851 | ||
3852 | if (!sk) | |
3853 | return true; | |
3854 | ||
3855 | tsk = tipc_sk(sk); | |
3856 | ||
3857 | _port = sysctl_tipc_sk_filter[0]; | |
3858 | _sktype = sysctl_tipc_sk_filter[1]; | |
3859 | _type = sysctl_tipc_sk_filter[2]; | |
3860 | _lower = sysctl_tipc_sk_filter[3]; | |
3861 | _upper = sysctl_tipc_sk_filter[4]; | |
3862 | ||
3863 | if (!_port && !_sktype && !_type && !_lower && !_upper) | |
3864 | return true; | |
3865 | ||
3866 | if (_port) | |
3867 | return (_port == tsk->portid); | |
3868 | ||
3869 | if (_sktype && _sktype != sk->sk_type) | |
3870 | return false; | |
3871 | ||
3872 | if (tsk->published) { | |
3873 | p = list_first_entry_or_null(&tsk->publications, | |
3874 | struct publication, binding_sock); | |
3875 | if (p) { | |
998d3907 JM |
3876 | type = p->sr.type; |
3877 | lower = p->sr.lower; | |
3878 | upper = p->sr.upper; | |
01e661eb TL |
3879 | } |
3880 | } | |
3881 | ||
3882 | if (!tipc_sk_type_connectionless(sk)) { | |
14623e00 JM |
3883 | type = msg_nametype(&tsk->phdr); |
3884 | lower = msg_nameinst(&tsk->phdr); | |
3885 | upper = lower; | |
01e661eb TL |
3886 | } |
3887 | ||
3888 | if ((_type && _type != type) || (_lower && _lower != lower) || | |
3889 | (_upper && _upper != upper)) | |
3890 | return false; | |
3891 | ||
3892 | return true; | |
3893 | } | |
3894 | ||
b4b9771b TL |
3895 | u32 tipc_sock_get_portid(struct sock *sk) |
3896 | { | |
3897 | return (sk) ? (tipc_sk(sk))->portid : 0; | |
3898 | } | |
3899 | ||
01e661eb TL |
3900 | /** |
3901 | * tipc_sk_overlimit1 - check if socket rx queue is about to be overloaded, | |
3902 | * both the rcv and backlog queues are considered | |
3903 | * @sk: tipc sk to be checked | |
3904 | * @skb: tipc msg to be checked | |
3905 | * | |
637b77fd | 3906 | * Return: true if the socket rx queue allocation is > 90%, otherwise false |
01e661eb TL |
3907 | */ |
3908 | ||
3909 | bool tipc_sk_overlimit1(struct sock *sk, struct sk_buff *skb) | |
3910 | { | |
3911 | atomic_t *dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
3912 | unsigned int lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
3913 | unsigned int qsize = sk->sk_backlog.len + sk_rmem_alloc_get(sk); | |
3914 | ||
3915 | return (qsize > lim * 90 / 100); | |
3916 | } | |
3917 | ||
3918 | /** | |
3919 | * tipc_sk_overlimit2 - check if socket rx queue is about to be overloaded, | |
3920 | * only the rcv queue is considered | |
3921 | * @sk: tipc sk to be checked | |
3922 | * @skb: tipc msg to be checked | |
3923 | * | |
637b77fd | 3924 | * Return: true if the socket rx queue allocation is > 90%, otherwise false |
01e661eb TL |
3925 | */ |
3926 | ||
3927 | bool tipc_sk_overlimit2(struct sock *sk, struct sk_buff *skb) | |
3928 | { | |
3929 | unsigned int lim = rcvbuf_limit(sk, skb); | |
3930 | unsigned int qsize = sk_rmem_alloc_get(sk); | |
3931 | ||
3932 | return (qsize > lim * 90 / 100); | |
3933 | } | |
3934 | ||
b4b9771b TL |
3935 | /** |
3936 | * tipc_sk_dump - dump TIPC socket | |
3937 | * @sk: tipc sk to be dumped | |
3938 | * @dqueues: bitmask to decide if any socket queue to be dumped? | |
3939 | * - TIPC_DUMP_NONE: don't dump socket queues | |
3940 | * - TIPC_DUMP_SK_SNDQ: dump socket send queue | |
3941 | * - TIPC_DUMP_SK_RCVQ: dump socket rcv queue | |
3942 | * - TIPC_DUMP_SK_BKLGQ: dump socket backlog queue | |
3943 | * - TIPC_DUMP_ALL: dump all the socket queues above | |
3944 | * @buf: returned buffer of dump data in format | |
3945 | */ | |
3946 | int tipc_sk_dump(struct sock *sk, u16 dqueues, char *buf) | |
3947 | { | |
3948 | int i = 0; | |
3949 | size_t sz = (dqueues) ? SK_LMAX : SK_LMIN; | |
14623e00 | 3950 | u32 conn_type, conn_instance; |
b4b9771b TL |
3951 | struct tipc_sock *tsk; |
3952 | struct publication *p; | |
3953 | bool tsk_connected; | |
3954 | ||
3955 | if (!sk) { | |
3956 | i += scnprintf(buf, sz, "sk data: (null)\n"); | |
3957 | return i; | |
3958 | } | |
3959 | ||
3960 | tsk = tipc_sk(sk); | |
3961 | tsk_connected = !tipc_sk_type_connectionless(sk); | |
3962 | ||
3963 | i += scnprintf(buf, sz, "sk data: %u", sk->sk_type); | |
3964 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_state); | |
3965 | i += scnprintf(buf + i, sz - i, " %x", tsk_own_node(tsk)); | |
3966 | i += scnprintf(buf + i, sz - i, " %u", tsk->portid); | |
3967 | i += scnprintf(buf + i, sz - i, " | %u", tsk_connected); | |
3968 | if (tsk_connected) { | |
3969 | i += scnprintf(buf + i, sz - i, " %x", tsk_peer_node(tsk)); | |
3970 | i += scnprintf(buf + i, sz - i, " %u", tsk_peer_port(tsk)); | |
14623e00 JM |
3971 | conn_type = msg_nametype(&tsk->phdr); |
3972 | conn_instance = msg_nameinst(&tsk->phdr); | |
3973 | i += scnprintf(buf + i, sz - i, " %u", conn_type); | |
3974 | i += scnprintf(buf + i, sz - i, " %u", conn_instance); | |
b4b9771b TL |
3975 | } |
3976 | i += scnprintf(buf + i, sz - i, " | %u", tsk->published); | |
3977 | if (tsk->published) { | |
3978 | p = list_first_entry_or_null(&tsk->publications, | |
3979 | struct publication, binding_sock); | |
998d3907 JM |
3980 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->sr.type : 0); |
3981 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->sr.lower : 0); | |
3982 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->sr.upper : 0); | |
b4b9771b TL |
3983 | } |
3984 | i += scnprintf(buf + i, sz - i, " | %u", tsk->snd_win); | |
3985 | i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_win); | |
3986 | i += scnprintf(buf + i, sz - i, " %u", tsk->max_pkt); | |
3987 | i += scnprintf(buf + i, sz - i, " %x", tsk->peer_caps); | |
3988 | i += scnprintf(buf + i, sz - i, " %u", tsk->cong_link_cnt); | |
3989 | i += scnprintf(buf + i, sz - i, " %u", tsk->snt_unacked); | |
3990 | i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_unacked); | |
3991 | i += scnprintf(buf + i, sz - i, " %u", atomic_read(&tsk->dupl_rcvcnt)); | |
3992 | i += scnprintf(buf + i, sz - i, " %u", sk->sk_shutdown); | |
3993 | i += scnprintf(buf + i, sz - i, " | %d", sk_wmem_alloc_get(sk)); | |
3994 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_sndbuf); | |
3995 | i += scnprintf(buf + i, sz - i, " | %d", sk_rmem_alloc_get(sk)); | |
3996 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_rcvbuf); | |
70c26558 | 3997 | i += scnprintf(buf + i, sz - i, " | %d\n", READ_ONCE(sk->sk_backlog.len)); |
b4b9771b TL |
3998 | |
3999 | if (dqueues & TIPC_DUMP_SK_SNDQ) { | |
4000 | i += scnprintf(buf + i, sz - i, "sk_write_queue: "); | |
4001 | i += tipc_list_dump(&sk->sk_write_queue, false, buf + i); | |
4002 | } | |
4003 | ||
4004 | if (dqueues & TIPC_DUMP_SK_RCVQ) { | |
4005 | i += scnprintf(buf + i, sz - i, "sk_receive_queue: "); | |
4006 | i += tipc_list_dump(&sk->sk_receive_queue, false, buf + i); | |
4007 | } | |
4008 | ||
4009 | if (dqueues & TIPC_DUMP_SK_BKLGQ) { | |
4010 | i += scnprintf(buf + i, sz - i, "sk_backlog:\n head "); | |
4011 | i += tipc_skb_dump(sk->sk_backlog.head, false, buf + i); | |
4012 | if (sk->sk_backlog.tail != sk->sk_backlog.head) { | |
4013 | i += scnprintf(buf + i, sz - i, " tail "); | |
4014 | i += tipc_skb_dump(sk->sk_backlog.tail, false, | |
4015 | buf + i); | |
4016 | } | |
4017 | } | |
4018 | ||
4019 | return i; | |
4020 | } |