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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
51b9a31c | 4 | * Copyright (c) 2001-2007, 2012-2016, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc | 37 | #include <linux/rhashtable.h> |
b97bf3fd | 38 | #include "core.h" |
e2dafe87 | 39 | #include "name_table.h" |
78acb1f9 | 40 | #include "node.h" |
e2dafe87 | 41 | #include "link.h" |
c637c103 | 42 | #include "name_distr.h" |
2e84c60b | 43 | #include "socket.h" |
a6bf70f7 | 44 | #include "bcast.h" |
49cc66ea | 45 | #include "netlink.h" |
2cf8aa19 | 46 | |
07f6c4bc | 47 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 48 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 49 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
50 | #define TIPC_MAX_PORT 0xffffffff |
51 | #define TIPC_MIN_PORT 1 | |
301bae56 | 52 | |
0c288c86 PB |
53 | enum { |
54 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 55 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 56 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 57 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 58 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
59 | }; |
60 | ||
301bae56 JPM |
61 | /** |
62 | * struct tipc_sock - TIPC socket structure | |
63 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
64 | * @conn_type: TIPC type used when connection was established |
65 | * @conn_instance: TIPC instance used when connection was established | |
66 | * @published: non-zero if port has one or more associated names | |
67 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 68 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 69 | * @phdr: preformatted message header used when sending messages |
301bae56 JPM |
70 | * @publications: list of publications for port |
71 | * @pub_count: total # of publications port has made during its lifetime | |
72 | * @probing_state: | |
301bae56 JPM |
73 | * @conn_timeout: the time we can wait for an unresponded setup request |
74 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
75 | * @link_cong: non-zero if owner must sleep because of link congestion | |
76 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
77 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
aeda16b6 | 78 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc YX |
79 | * @node: hash table node |
80 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
81 | */ |
82 | struct tipc_sock { | |
83 | struct sock sk; | |
301bae56 JPM |
84 | u32 conn_type; |
85 | u32 conn_instance; | |
86 | int published; | |
87 | u32 max_pkt; | |
07f6c4bc | 88 | u32 portid; |
301bae56 JPM |
89 | struct tipc_msg phdr; |
90 | struct list_head sock_list; | |
91 | struct list_head publications; | |
92 | u32 pub_count; | |
301bae56 JPM |
93 | uint conn_timeout; |
94 | atomic_t dupl_rcvcnt; | |
8ea642ee | 95 | bool probe_unacked; |
301bae56 | 96 | bool link_cong; |
10724cc7 JPM |
97 | u16 snt_unacked; |
98 | u16 snd_win; | |
60020e18 | 99 | u16 peer_caps; |
10724cc7 JPM |
100 | u16 rcv_unacked; |
101 | u16 rcv_win; | |
aeda16b6 | 102 | struct sockaddr_tipc peer; |
07f6c4bc YX |
103 | struct rhash_head node; |
104 | struct rcu_head rcu; | |
301bae56 | 105 | }; |
b97bf3fd | 106 | |
4f4482dc | 107 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 108 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 109 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 110 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
111 | static int tipc_release(struct socket *sock); |
112 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 113 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 114 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 115 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 116 | struct tipc_name_seq const *seq); |
301bae56 | 117 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 118 | struct tipc_name_seq const *seq); |
e05b31f4 | 119 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
120 | static int tipc_sk_insert(struct tipc_sock *tsk); |
121 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
122 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
123 | size_t dsz); | |
124 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 125 | |
bca65eae FW |
126 | static const struct proto_ops packet_ops; |
127 | static const struct proto_ops stream_ops; | |
128 | static const struct proto_ops msg_ops; | |
b97bf3fd | 129 | static struct proto tipc_proto; |
6cca7289 HX |
130 | static const struct rhashtable_params tsk_rht_params; |
131 | ||
c5898636 JPM |
132 | static u32 tsk_own_node(struct tipc_sock *tsk) |
133 | { | |
134 | return msg_prevnode(&tsk->phdr); | |
135 | } | |
136 | ||
301bae56 | 137 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 138 | { |
301bae56 | 139 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
140 | } |
141 | ||
301bae56 | 142 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 143 | { |
301bae56 | 144 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
145 | } |
146 | ||
301bae56 | 147 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 148 | { |
301bae56 | 149 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
150 | } |
151 | ||
301bae56 | 152 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 153 | { |
301bae56 | 154 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
155 | } |
156 | ||
301bae56 | 157 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 158 | { |
301bae56 | 159 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
160 | } |
161 | ||
301bae56 | 162 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 163 | { |
301bae56 | 164 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
165 | } |
166 | ||
301bae56 | 167 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 168 | { |
301bae56 | 169 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
170 | } |
171 | ||
301bae56 | 172 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
173 | { |
174 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
175 | return -EINVAL; | |
301bae56 | 176 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
177 | return 0; |
178 | } | |
8826cde6 | 179 | |
301bae56 JPM |
180 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
181 | { | |
182 | return container_of(sk, struct tipc_sock, sk); | |
183 | } | |
184 | ||
10724cc7 | 185 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 186 | { |
6998cc6e | 187 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
188 | } |
189 | ||
190 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
191 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
192 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
193 | */ | |
194 | static u16 tsk_adv_blocks(int len) | |
195 | { | |
196 | return len / FLOWCTL_BLK_SZ / 4; | |
197 | } | |
198 | ||
199 | /* tsk_inc(): increment counter for sent or received data | |
200 | * - If block based flow control is not supported by peer we | |
201 | * fall back to message based ditto, incrementing the counter | |
202 | */ | |
203 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
204 | { | |
205 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
206 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
207 | return 1; | |
301bae56 JPM |
208 | } |
209 | ||
0c3141e9 | 210 | /** |
2e84c60b | 211 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
212 | * |
213 | * Caller must hold socket lock | |
b97bf3fd | 214 | */ |
2e84c60b | 215 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 216 | { |
5f6d9123 | 217 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
218 | } |
219 | ||
bcd3ffd4 JPM |
220 | /* tipc_sk_respond() : send response message back to sender |
221 | */ | |
222 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
223 | { | |
224 | u32 selector; | |
225 | u32 dnode; | |
226 | u32 onode = tipc_own_addr(sock_net(sk)); | |
227 | ||
228 | if (!tipc_msg_reverse(onode, &skb, err)) | |
229 | return; | |
230 | ||
231 | dnode = msg_destnode(buf_msg(skb)); | |
232 | selector = msg_origport(buf_msg(skb)); | |
233 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
234 | } | |
235 | ||
b97bf3fd | 236 | /** |
2e84c60b | 237 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
238 | * |
239 | * Caller must hold socket lock | |
b97bf3fd | 240 | */ |
2e84c60b | 241 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 242 | { |
a6ca1094 | 243 | struct sk_buff *skb; |
0c3141e9 | 244 | |
bcd3ffd4 JPM |
245 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
246 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
247 | } |
248 | ||
d6fb7e9c PB |
249 | static bool tipc_sk_connected(struct sock *sk) |
250 | { | |
f40acbaf | 251 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
252 | } |
253 | ||
c752023a PB |
254 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
255 | * @sk: socket | |
256 | * | |
257 | * Returns true if connection less, false otherwise | |
258 | */ | |
259 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
260 | { | |
261 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
262 | } | |
263 | ||
2e84c60b | 264 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
265 | * |
266 | * Handles cases where the node's network address has changed from | |
267 | * the default of <0.0.0> to its configured setting. | |
268 | */ | |
2e84c60b | 269 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 270 | { |
d6fb7e9c PB |
271 | struct sock *sk = &tsk->sk; |
272 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 273 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
274 | u32 orig_node; |
275 | u32 peer_node; | |
276 | ||
d6fb7e9c | 277 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
278 | return false; |
279 | ||
280 | if (unlikely(msg_origport(msg) != peer_port)) | |
281 | return false; | |
282 | ||
283 | orig_node = msg_orignode(msg); | |
301bae56 | 284 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
285 | |
286 | if (likely(orig_node == peer_node)) | |
287 | return true; | |
288 | ||
34747539 | 289 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
290 | return true; |
291 | ||
34747539 | 292 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
293 | return true; |
294 | ||
295 | return false; | |
296 | } | |
297 | ||
0c288c86 PB |
298 | /* tipc_set_sk_state - set the sk_state of the socket |
299 | * @sk: socket | |
300 | * | |
301 | * Caller must hold socket lock | |
302 | * | |
303 | * Returns 0 on success, errno otherwise | |
304 | */ | |
305 | static int tipc_set_sk_state(struct sock *sk, int state) | |
306 | { | |
438adcaf | 307 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
308 | int res = -EINVAL; |
309 | ||
310 | switch (state) { | |
438adcaf PB |
311 | case TIPC_OPEN: |
312 | res = 0; | |
313 | break; | |
0c288c86 | 314 | case TIPC_LISTEN: |
99a20889 | 315 | case TIPC_CONNECTING: |
438adcaf | 316 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
317 | res = 0; |
318 | break; | |
8ea642ee | 319 | case TIPC_ESTABLISHED: |
99a20889 | 320 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 321 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
322 | res = 0; |
323 | break; | |
9fd4b070 | 324 | case TIPC_DISCONNECTING: |
99a20889 | 325 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
326 | oldsk_state == TIPC_ESTABLISHED) |
327 | res = 0; | |
328 | break; | |
0c288c86 PB |
329 | } |
330 | ||
331 | if (!res) | |
332 | sk->sk_state = state; | |
333 | ||
334 | return res; | |
335 | } | |
336 | ||
b97bf3fd | 337 | /** |
c5fa7b3c | 338 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 339 | * @net: network namespace (must be default network) |
b97bf3fd PL |
340 | * @sock: pre-allocated socket structure |
341 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 342 | * @kern: caused by kernel or by userspace? |
c4307285 | 343 | * |
0c3141e9 AS |
344 | * This routine creates additional data structures used by the TIPC socket, |
345 | * initializes them, and links them together. | |
b97bf3fd PL |
346 | * |
347 | * Returns 0 on success, errno otherwise | |
348 | */ | |
58ed9442 JPM |
349 | static int tipc_sk_create(struct net *net, struct socket *sock, |
350 | int protocol, int kern) | |
b97bf3fd | 351 | { |
c5898636 | 352 | struct tipc_net *tn; |
0c3141e9 | 353 | const struct proto_ops *ops; |
b97bf3fd | 354 | struct sock *sk; |
58ed9442 | 355 | struct tipc_sock *tsk; |
5b8fa7ce | 356 | struct tipc_msg *msg; |
0c3141e9 AS |
357 | |
358 | /* Validate arguments */ | |
b97bf3fd PL |
359 | if (unlikely(protocol != 0)) |
360 | return -EPROTONOSUPPORT; | |
361 | ||
b97bf3fd PL |
362 | switch (sock->type) { |
363 | case SOCK_STREAM: | |
0c3141e9 | 364 | ops = &stream_ops; |
b97bf3fd PL |
365 | break; |
366 | case SOCK_SEQPACKET: | |
0c3141e9 | 367 | ops = &packet_ops; |
b97bf3fd PL |
368 | break; |
369 | case SOCK_DGRAM: | |
b97bf3fd | 370 | case SOCK_RDM: |
0c3141e9 | 371 | ops = &msg_ops; |
b97bf3fd | 372 | break; |
49978651 | 373 | default: |
49978651 | 374 | return -EPROTOTYPE; |
b97bf3fd PL |
375 | } |
376 | ||
0c3141e9 | 377 | /* Allocate socket's protocol area */ |
11aa9c28 | 378 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 379 | if (sk == NULL) |
b97bf3fd | 380 | return -ENOMEM; |
b97bf3fd | 381 | |
58ed9442 | 382 | tsk = tipc_sk(sk); |
301bae56 | 383 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
384 | INIT_LIST_HEAD(&tsk->publications); |
385 | msg = &tsk->phdr; | |
c5898636 JPM |
386 | tn = net_generic(sock_net(sk), tipc_net_id); |
387 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 388 | NAMED_H_SIZE, 0); |
b97bf3fd | 389 | |
0c3141e9 | 390 | /* Finish initializing socket data structures */ |
0c3141e9 | 391 | sock->ops = ops; |
0c3141e9 | 392 | sock_init_data(sock, sk); |
438adcaf | 393 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 394 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 395 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
396 | return -EINVAL; |
397 | } | |
398 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 399 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
6f00089c | 400 | sk->sk_shutdown = 0; |
4f4482dc | 401 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 402 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
403 | sk->sk_data_ready = tipc_data_ready; |
404 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 405 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
406 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
407 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 408 | |
10724cc7 JPM |
409 | /* Start out with safe limits until we receive an advertised window */ |
410 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
411 | tsk->rcv_win = tsk->snd_win; | |
412 | ||
c752023a | 413 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 414 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 415 | if (sock->type == SOCK_DGRAM) |
301bae56 | 416 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 417 | } |
438adcaf | 418 | |
b97bf3fd PL |
419 | return 0; |
420 | } | |
421 | ||
07f6c4bc YX |
422 | static void tipc_sk_callback(struct rcu_head *head) |
423 | { | |
424 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
425 | ||
426 | sock_put(&tsk->sk); | |
427 | } | |
428 | ||
6f00089c PB |
429 | /* Caller should hold socket lock for the socket. */ |
430 | static void __tipc_shutdown(struct socket *sock, int error) | |
431 | { | |
432 | struct sock *sk = sock->sk; | |
433 | struct tipc_sock *tsk = tipc_sk(sk); | |
434 | struct net *net = sock_net(sk); | |
435 | u32 dnode = tsk_peer_node(tsk); | |
436 | struct sk_buff *skb; | |
437 | ||
438 | /* Reject all unreceived messages, except on an active connection | |
439 | * (which disconnects locally & sends a 'FIN+' to peer). | |
440 | */ | |
441 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
442 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
443 | kfree_skb(skb); | |
693c5649 | 444 | continue; |
6f00089c | 445 | } |
693c5649 JPM |
446 | if (!tipc_sk_type_connectionless(sk) && |
447 | sk->sk_state != TIPC_DISCONNECTING) { | |
448 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
449 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
450 | } | |
451 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 452 | } |
693c5649 JPM |
453 | |
454 | if (tipc_sk_type_connectionless(sk)) | |
455 | return; | |
456 | ||
6f00089c PB |
457 | if (sk->sk_state != TIPC_DISCONNECTING) { |
458 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
459 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
460 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
461 | tsk->portid, error); | |
462 | if (skb) | |
463 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
464 | tipc_node_remove_conn(net, dnode, tsk->portid); |
465 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
466 | } |
467 | } | |
468 | ||
b97bf3fd | 469 | /** |
247f0f3c | 470 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
471 | * @sock: socket to destroy |
472 | * | |
473 | * This routine cleans up any messages that are still queued on the socket. | |
474 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
475 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
476 | * and any others are discarded. (If the first message on a STREAM socket | |
477 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 478 | * |
b97bf3fd PL |
479 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
480 | * are returned or discarded according to the "destination droppable" setting | |
481 | * specified for the message by the sender. | |
482 | * | |
483 | * Returns 0 on success, errno otherwise | |
484 | */ | |
247f0f3c | 485 | static int tipc_release(struct socket *sock) |
b97bf3fd | 486 | { |
b97bf3fd | 487 | struct sock *sk = sock->sk; |
58ed9442 | 488 | struct tipc_sock *tsk; |
b97bf3fd | 489 | |
0c3141e9 AS |
490 | /* |
491 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
492 | * releases a pre-allocated child socket that was never used) | |
493 | */ | |
0c3141e9 | 494 | if (sk == NULL) |
b97bf3fd | 495 | return 0; |
c4307285 | 496 | |
58ed9442 | 497 | tsk = tipc_sk(sk); |
0c3141e9 AS |
498 | lock_sock(sk); |
499 | ||
6f00089c PB |
500 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
501 | sk->sk_shutdown = SHUTDOWN_MASK; | |
301bae56 | 502 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 503 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 504 | tipc_sk_remove(tsk); |
b97bf3fd | 505 | |
0c3141e9 | 506 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 507 | release_sock(sk); |
07f6c4bc YX |
508 | |
509 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 510 | sock->sk = NULL; |
b97bf3fd | 511 | |
065d7e39 | 512 | return 0; |
b97bf3fd PL |
513 | } |
514 | ||
515 | /** | |
247f0f3c | 516 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
517 | * @sock: socket structure |
518 | * @uaddr: socket address describing name(s) and desired operation | |
519 | * @uaddr_len: size of socket address data structure | |
c4307285 | 520 | * |
b97bf3fd PL |
521 | * Name and name sequence binding is indicated using a positive scope value; |
522 | * a negative scope value unbinds the specified name. Specifying no name | |
523 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 524 | * |
b97bf3fd | 525 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
526 | * |
527 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
528 | * access any non-constant socket information. | |
b97bf3fd | 529 | */ |
247f0f3c YX |
530 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
531 | int uaddr_len) | |
b97bf3fd | 532 | { |
84602761 | 533 | struct sock *sk = sock->sk; |
b97bf3fd | 534 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 535 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 536 | int res = -EINVAL; |
b97bf3fd | 537 | |
84602761 YX |
538 | lock_sock(sk); |
539 | if (unlikely(!uaddr_len)) { | |
301bae56 | 540 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
541 | goto exit; |
542 | } | |
c4307285 | 543 | |
84602761 YX |
544 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
545 | res = -EINVAL; | |
546 | goto exit; | |
547 | } | |
548 | if (addr->family != AF_TIPC) { | |
549 | res = -EAFNOSUPPORT; | |
550 | goto exit; | |
551 | } | |
b97bf3fd | 552 | |
b97bf3fd PL |
553 | if (addr->addrtype == TIPC_ADDR_NAME) |
554 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
555 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
556 | res = -EAFNOSUPPORT; | |
557 | goto exit; | |
558 | } | |
c4307285 | 559 | |
13a2e898 | 560 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 561 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
562 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
563 | res = -EACCES; | |
564 | goto exit; | |
565 | } | |
c422f1bd | 566 | |
84602761 | 567 | res = (addr->scope > 0) ? |
301bae56 JPM |
568 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
569 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
570 | exit: |
571 | release_sock(sk); | |
572 | return res; | |
b97bf3fd PL |
573 | } |
574 | ||
c4307285 | 575 | /** |
247f0f3c | 576 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
577 | * @sock: socket structure |
578 | * @uaddr: area for returned socket address | |
579 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 580 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 581 | * |
b97bf3fd | 582 | * Returns 0 on success, errno otherwise |
0c3141e9 | 583 | * |
2da59918 AS |
584 | * NOTE: This routine doesn't need to take the socket lock since it only |
585 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 586 | * a completely predictable manner). |
b97bf3fd | 587 | */ |
247f0f3c YX |
588 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
589 | int *uaddr_len, int peer) | |
b97bf3fd | 590 | { |
b97bf3fd | 591 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
592 | struct sock *sk = sock->sk; |
593 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 594 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 595 | |
88f8a5e3 | 596 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 597 | if (peer) { |
f40acbaf | 598 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 599 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 600 | return -ENOTCONN; |
301bae56 JPM |
601 | addr->addr.id.ref = tsk_peer_port(tsk); |
602 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 603 | } else { |
07f6c4bc | 604 | addr->addr.id.ref = tsk->portid; |
34747539 | 605 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 606 | } |
b97bf3fd PL |
607 | |
608 | *uaddr_len = sizeof(*addr); | |
609 | addr->addrtype = TIPC_ADDR_ID; | |
610 | addr->family = AF_TIPC; | |
611 | addr->scope = 0; | |
b97bf3fd PL |
612 | addr->addr.name.domain = 0; |
613 | ||
0c3141e9 | 614 | return 0; |
b97bf3fd PL |
615 | } |
616 | ||
617 | /** | |
247f0f3c | 618 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
619 | * @file: file structure associated with the socket |
620 | * @sock: socket for which to calculate the poll bits | |
621 | * @wait: ??? | |
622 | * | |
9b674e82 AS |
623 | * Returns pollmask value |
624 | * | |
625 | * COMMENTARY: | |
626 | * It appears that the usual socket locking mechanisms are not useful here | |
627 | * since the pollmask info is potentially out-of-date the moment this routine | |
628 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
629 | * to handle any preventable race conditions, so TIPC will do the same ... | |
630 | * | |
f662c070 AS |
631 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
632 | * imply that the operation will succeed, merely that it should be performed | |
633 | * and will not block. | |
b97bf3fd | 634 | */ |
247f0f3c YX |
635 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
636 | poll_table *wait) | |
b97bf3fd | 637 | { |
9b674e82 | 638 | struct sock *sk = sock->sk; |
58ed9442 | 639 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 640 | u32 mask = 0; |
9b674e82 | 641 | |
f288bef4 | 642 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 643 | |
6f00089c PB |
644 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
645 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
646 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
647 | mask |= POLLHUP; | |
648 | ||
f40acbaf PB |
649 | switch (sk->sk_state) { |
650 | case TIPC_ESTABLISHED: | |
301bae56 | 651 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 | 652 | mask |= POLLOUT; |
f40acbaf PB |
653 | /* fall thru' */ |
654 | case TIPC_LISTEN: | |
655 | case TIPC_CONNECTING: | |
f662c070 AS |
656 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
657 | mask |= (POLLIN | POLLRDNORM); | |
f40acbaf PB |
658 | break; |
659 | case TIPC_OPEN: | |
660 | if (!tsk->link_cong) | |
661 | mask |= POLLOUT; | |
662 | if (tipc_sk_type_connectionless(sk) && | |
663 | (!skb_queue_empty(&sk->sk_receive_queue))) | |
664 | mask |= (POLLIN | POLLRDNORM); | |
665 | break; | |
666 | case TIPC_DISCONNECTING: | |
667 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
668 | break; | |
f662c070 | 669 | } |
9b674e82 AS |
670 | |
671 | return mask; | |
b97bf3fd PL |
672 | } |
673 | ||
0abd8ff2 JPM |
674 | /** |
675 | * tipc_sendmcast - send multicast message | |
676 | * @sock: socket structure | |
677 | * @seq: destination address | |
562640f3 | 678 | * @msg: message to send |
0abd8ff2 JPM |
679 | * @dsz: total length of message data |
680 | * @timeo: timeout to wait for wakeup | |
681 | * | |
682 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
683 | * Returns the number of bytes sent on success, or errno | |
684 | */ | |
685 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 686 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
687 | { |
688 | struct sock *sk = sock->sk; | |
c5898636 | 689 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 690 | struct net *net = sock_net(sk); |
c5898636 | 691 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 692 | struct sk_buff_head pktchain; |
f25dcc76 | 693 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
694 | uint mtu; |
695 | int rc; | |
696 | ||
7cf87fa2 PB |
697 | if (!timeo && tsk->link_cong) |
698 | return -ELINKCONG; | |
699 | ||
0abd8ff2 JPM |
700 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
701 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
702 | msg_set_destport(mhdr, 0); | |
703 | msg_set_destnode(mhdr, 0); | |
704 | msg_set_nametype(mhdr, seq->type); | |
705 | msg_set_namelower(mhdr, seq->lower); | |
706 | msg_set_nameupper(mhdr, seq->upper); | |
707 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
708 | ||
f214fc40 PB |
709 | skb_queue_head_init(&pktchain); |
710 | ||
0abd8ff2 | 711 | new_mtu: |
959e1781 | 712 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 713 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
714 | if (unlikely(rc < 0)) |
715 | return rc; | |
716 | ||
717 | do { | |
f214fc40 | 718 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
719 | if (likely(!rc)) |
720 | return dsz; | |
721 | ||
722 | if (rc == -ELINKCONG) { | |
723 | tsk->link_cong = 1; | |
724 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
725 | if (!rc) | |
726 | continue; | |
0abd8ff2 | 727 | } |
f214fc40 | 728 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
729 | if (rc == -EMSGSIZE) { |
730 | msg->msg_iter = save; | |
0abd8ff2 | 731 | goto new_mtu; |
f25dcc76 | 732 | } |
22d85c79 JPM |
733 | break; |
734 | } while (1); | |
0abd8ff2 JPM |
735 | return rc; |
736 | } | |
737 | ||
cb1b7280 JPM |
738 | /** |
739 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
740 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
741 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
742 | * | |
743 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 744 | */ |
cb1b7280 JPM |
745 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
746 | struct sk_buff_head *inputq) | |
078bec82 | 747 | { |
cb1b7280 | 748 | struct tipc_msg *msg; |
3c724acd | 749 | struct tipc_plist dports; |
3c724acd | 750 | u32 portid; |
078bec82 | 751 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
752 | struct sk_buff_head tmpq; |
753 | uint hsz; | |
754 | struct sk_buff *skb, *_skb; | |
3c724acd | 755 | |
cb1b7280 | 756 | __skb_queue_head_init(&tmpq); |
3c724acd | 757 | tipc_plist_init(&dports); |
078bec82 | 758 | |
cb1b7280 JPM |
759 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
760 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
761 | msg = buf_msg(skb); | |
762 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
763 | ||
764 | if (in_own_node(net, msg_orignode(msg))) | |
765 | scope = TIPC_NODE_SCOPE; | |
766 | ||
767 | /* Create destination port list and message clones: */ | |
768 | tipc_nametbl_mc_translate(net, | |
769 | msg_nametype(msg), msg_namelower(msg), | |
770 | msg_nameupper(msg), scope, &dports); | |
771 | portid = tipc_plist_pop(&dports); | |
772 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
773 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
774 | if (_skb) { | |
775 | msg_set_destport(buf_msg(_skb), portid); | |
776 | __skb_queue_tail(&tmpq, _skb); | |
777 | continue; | |
778 | } | |
779 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 780 | } |
cb1b7280 JPM |
781 | /* Append to inputq if not already done by other thread */ |
782 | spin_lock_bh(&inputq->lock); | |
783 | if (skb_peek(arrvq) == skb) { | |
784 | skb_queue_splice_tail_init(&tmpq, inputq); | |
785 | kfree_skb(__skb_dequeue(arrvq)); | |
786 | } | |
787 | spin_unlock_bh(&inputq->lock); | |
788 | __skb_queue_purge(&tmpq); | |
789 | kfree_skb(skb); | |
078bec82 | 790 | } |
cb1b7280 | 791 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
792 | } |
793 | ||
ac0074ee JPM |
794 | /** |
795 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
796 | * @tsk: receiving socket | |
bcd3ffd4 | 797 | * @skb: pointer to message buffer. |
ac0074ee | 798 | */ |
f1d048f2 JPM |
799 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
800 | struct sk_buff_head *xmitq) | |
ac0074ee | 801 | { |
bcd3ffd4 | 802 | struct sock *sk = &tsk->sk; |
f1d048f2 | 803 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
804 | struct tipc_msg *hdr = buf_msg(skb); |
805 | int mtyp = msg_type(hdr); | |
10724cc7 | 806 | bool conn_cong; |
bcd3ffd4 | 807 | |
ac0074ee | 808 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 809 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
810 | goto exit; |
811 | ||
8ea642ee | 812 | tsk->probe_unacked = false; |
ac0074ee | 813 | |
bcd3ffd4 JPM |
814 | if (mtyp == CONN_PROBE) { |
815 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
816 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
817 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
818 | return; |
819 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 820 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
821 | tsk->snt_unacked -= msg_conn_ack(hdr); |
822 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
823 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 824 | if (conn_cong) |
bcd3ffd4 JPM |
825 | sk->sk_write_space(sk); |
826 | } else if (mtyp != CONN_PROBE_REPLY) { | |
827 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 828 | } |
ac0074ee | 829 | exit: |
bcd3ffd4 | 830 | kfree_skb(skb); |
ac0074ee JPM |
831 | } |
832 | ||
3f40504f YX |
833 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
834 | { | |
d9dc8b0f | 835 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
3f40504f | 836 | struct sock *sk = sock->sk; |
58ed9442 | 837 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
838 | int done; |
839 | ||
840 | do { | |
841 | int err = sock_error(sk); | |
842 | if (err) | |
843 | return err; | |
6f00089c | 844 | if (sk->sk_shutdown & SEND_SHUTDOWN) |
3f40504f YX |
845 | return -EPIPE; |
846 | if (!*timeo_p) | |
847 | return -EAGAIN; | |
848 | if (signal_pending(current)) | |
849 | return sock_intr_errno(*timeo_p); | |
850 | ||
d9dc8b0f WC |
851 | add_wait_queue(sk_sleep(sk), &wait); |
852 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong, &wait); | |
853 | remove_wait_queue(sk_sleep(sk), &wait); | |
3f40504f YX |
854 | } while (!done); |
855 | return 0; | |
856 | } | |
857 | ||
b97bf3fd | 858 | /** |
247f0f3c | 859 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
860 | * @sock: socket structure |
861 | * @m: message to send | |
e2dafe87 | 862 | * @dsz: amount of user data to be sent |
c4307285 | 863 | * |
b97bf3fd | 864 | * Message must have an destination specified explicitly. |
c4307285 | 865 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
866 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
867 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 868 | * |
b97bf3fd PL |
869 | * Returns the number of bytes sent on success, or errno otherwise |
870 | */ | |
1b784140 | 871 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 872 | struct msghdr *m, size_t dsz) |
39a0295f YX |
873 | { |
874 | struct sock *sk = sock->sk; | |
875 | int ret; | |
876 | ||
877 | lock_sock(sk); | |
878 | ret = __tipc_sendmsg(sock, m, dsz); | |
879 | release_sock(sk); | |
880 | ||
881 | return ret; | |
882 | } | |
883 | ||
884 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 885 | { |
e2dafe87 | 886 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 887 | struct sock *sk = sock->sk; |
58ed9442 | 888 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 889 | struct net *net = sock_net(sk); |
301bae56 | 890 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 891 | u32 dnode, dport; |
f214fc40 | 892 | struct sk_buff_head pktchain; |
c752023a | 893 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
a6ca1094 | 894 | struct sk_buff *skb; |
f2f8036e | 895 | struct tipc_name_seq *seq; |
f25dcc76 | 896 | struct iov_iter save; |
e2dafe87 | 897 | u32 mtu; |
3f40504f | 898 | long timeo; |
88b17b6a | 899 | int rc; |
b97bf3fd | 900 | |
e2dafe87 | 901 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 902 | return -EMSGSIZE; |
f2f8036e | 903 | if (unlikely(!dest)) { |
c752023a | 904 | if (is_connectionless && tsk->peer.family == AF_TIPC) |
aeda16b6 | 905 | dest = &tsk->peer; |
f2f8036e EH |
906 | else |
907 | return -EDESTADDRREQ; | |
908 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
909 | dest->family != AF_TIPC) { | |
910 | return -EINVAL; | |
911 | } | |
c752023a | 912 | if (!is_connectionless) { |
0c288c86 | 913 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 914 | return -EPIPE; |
438adcaf | 915 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
916 | return -EISCONN; |
917 | if (tsk->published) | |
918 | return -EOPNOTSUPP; | |
3388007b | 919 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
920 | tsk->conn_type = dest->addr.name.name.type; |
921 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 922 | } |
b97bf3fd | 923 | } |
f2f8036e | 924 | seq = &dest->addr.nameseq; |
3f40504f | 925 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
926 | |
927 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 928 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
929 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
930 | u32 type = dest->addr.name.name.type; | |
931 | u32 inst = dest->addr.name.name.instance; | |
932 | u32 domain = dest->addr.name.domain; | |
933 | ||
934 | dnode = domain; | |
935 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
936 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
937 | msg_set_nametype(mhdr, type); | |
938 | msg_set_nameinst(mhdr, inst); | |
939 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 940 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
941 | msg_set_destnode(mhdr, dnode); |
942 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
943 | if (unlikely(!dport && !dnode)) |
944 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
945 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
946 | dnode = dest->addr.id.node; | |
947 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
948 | msg_set_lookup_scope(mhdr, 0); | |
949 | msg_set_destnode(mhdr, dnode); | |
950 | msg_set_destport(mhdr, dest->addr.id.ref); | |
951 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
952 | } | |
953 | ||
f214fc40 | 954 | skb_queue_head_init(&pktchain); |
f25dcc76 | 955 | save = m->msg_iter; |
e2dafe87 | 956 | new_mtu: |
f2f9800d | 957 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 958 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 959 | if (rc < 0) |
39a0295f | 960 | return rc; |
e2dafe87 JPM |
961 | |
962 | do { | |
f214fc40 | 963 | skb = skb_peek(&pktchain); |
a6ca1094 | 964 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 965 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 966 | if (likely(!rc)) { |
c752023a | 967 | if (!is_connectionless) |
99a20889 | 968 | tipc_set_sk_state(sk, TIPC_CONNECTING); |
22d85c79 | 969 | return dsz; |
c4307285 | 970 | } |
22d85c79 JPM |
971 | if (rc == -ELINKCONG) { |
972 | tsk->link_cong = 1; | |
973 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
974 | if (!rc) | |
975 | continue; | |
976 | } | |
f214fc40 | 977 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
978 | if (rc == -EMSGSIZE) { |
979 | m->msg_iter = save; | |
e2dafe87 | 980 | goto new_mtu; |
f25dcc76 | 981 | } |
22d85c79 JPM |
982 | break; |
983 | } while (1); | |
e2dafe87 JPM |
984 | |
985 | return rc; | |
b97bf3fd PL |
986 | } |
987 | ||
391a6dd1 YX |
988 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
989 | { | |
d9dc8b0f | 990 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
391a6dd1 | 991 | struct sock *sk = sock->sk; |
58ed9442 | 992 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
993 | int done; |
994 | ||
995 | do { | |
996 | int err = sock_error(sk); | |
997 | if (err) | |
998 | return err; | |
9fd4b070 | 999 | if (sk->sk_state == TIPC_DISCONNECTING) |
391a6dd1 | 1000 | return -EPIPE; |
f40acbaf | 1001 | else if (!tipc_sk_connected(sk)) |
391a6dd1 YX |
1002 | return -ENOTCONN; |
1003 | if (!*timeo_p) | |
1004 | return -EAGAIN; | |
1005 | if (signal_pending(current)) | |
1006 | return sock_intr_errno(*timeo_p); | |
1007 | ||
d9dc8b0f | 1008 | add_wait_queue(sk_sleep(sk), &wait); |
391a6dd1 | 1009 | done = sk_wait_event(sk, timeo_p, |
60120526 | 1010 | (!tsk->link_cong && |
301bae56 | 1011 | !tsk_conn_cong(tsk)) || |
d9dc8b0f WC |
1012 | !tipc_sk_connected(sk), &wait); |
1013 | remove_wait_queue(sk_sleep(sk), &wait); | |
391a6dd1 YX |
1014 | } while (!done); |
1015 | return 0; | |
1016 | } | |
1017 | ||
c4307285 | 1018 | /** |
4ccfe5e0 | 1019 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 1020 | * @sock: socket structure |
4ccfe5e0 JPM |
1021 | * @m: data to send |
1022 | * @dsz: total length of data to be transmitted | |
c4307285 | 1023 | * |
4ccfe5e0 | 1024 | * Used for SOCK_STREAM data. |
c4307285 | 1025 | * |
4ccfe5e0 JPM |
1026 | * Returns the number of bytes sent on success (or partial success), |
1027 | * or errno if no data sent | |
b97bf3fd | 1028 | */ |
1b784140 | 1029 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1030 | { |
1031 | struct sock *sk = sock->sk; | |
1032 | int ret; | |
1033 | ||
1034 | lock_sock(sk); | |
1035 | ret = __tipc_send_stream(sock, m, dsz); | |
1036 | release_sock(sk); | |
1037 | ||
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1042 | { |
0c3141e9 | 1043 | struct sock *sk = sock->sk; |
f2f9800d | 1044 | struct net *net = sock_net(sk); |
58ed9442 | 1045 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1046 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1047 | struct sk_buff_head pktchain; |
342dfc30 | 1048 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1049 | u32 portid = tsk->portid; |
4ccfe5e0 | 1050 | int rc = -EINVAL; |
391a6dd1 | 1051 | long timeo; |
4ccfe5e0 JPM |
1052 | u32 dnode; |
1053 | uint mtu, send, sent = 0; | |
f25dcc76 | 1054 | struct iov_iter save; |
10724cc7 | 1055 | int hlen = MIN_H_SIZE; |
b97bf3fd PL |
1056 | |
1057 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1058 | if (unlikely(dest)) { |
39a0295f | 1059 | rc = __tipc_sendmsg(sock, m, dsz); |
10724cc7 | 1060 | hlen = msg_hdr_sz(mhdr); |
4ccfe5e0 | 1061 | if (dsz && (dsz == rc)) |
10724cc7 | 1062 | tsk->snt_unacked = tsk_inc(tsk, dsz + hlen); |
4ccfe5e0 JPM |
1063 | return rc; |
1064 | } | |
1065 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1066 | return -EMSGSIZE; |
1067 | ||
f40acbaf | 1068 | if (unlikely(!tipc_sk_connected(sk))) { |
9fd4b070 | 1069 | if (sk->sk_state == TIPC_DISCONNECTING) |
39a0295f | 1070 | return -EPIPE; |
391a6dd1 | 1071 | else |
39a0295f | 1072 | return -ENOTCONN; |
391a6dd1 | 1073 | } |
1d835874 | 1074 | |
391a6dd1 | 1075 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
7cf87fa2 PB |
1076 | if (!timeo && tsk->link_cong) |
1077 | return -ELINKCONG; | |
1078 | ||
301bae56 | 1079 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1080 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1081 | |
1082 | next: | |
f25dcc76 | 1083 | save = m->msg_iter; |
301bae56 | 1084 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1085 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1086 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1087 | if (unlikely(rc < 0)) |
39a0295f | 1088 | return rc; |
f214fc40 | 1089 | |
c4307285 | 1090 | do { |
301bae56 | 1091 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1092 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1093 | if (likely(!rc)) { |
10724cc7 | 1094 | tsk->snt_unacked += tsk_inc(tsk, send + hlen); |
4ccfe5e0 JPM |
1095 | sent += send; |
1096 | if (sent == dsz) | |
22d85c79 | 1097 | return dsz; |
4ccfe5e0 JPM |
1098 | goto next; |
1099 | } | |
1100 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1101 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1102 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1103 | portid); | |
f25dcc76 | 1104 | m->msg_iter = save; |
4ccfe5e0 JPM |
1105 | goto next; |
1106 | } | |
1107 | if (rc != -ELINKCONG) | |
1108 | break; | |
22d85c79 | 1109 | |
50100a5e | 1110 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1111 | } |
1112 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1113 | } while (!rc); | |
39a0295f | 1114 | |
f214fc40 | 1115 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1116 | return sent ? sent : rc; |
b97bf3fd PL |
1117 | } |
1118 | ||
c4307285 | 1119 | /** |
4ccfe5e0 | 1120 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1121 | * @sock: socket structure |
4ccfe5e0 JPM |
1122 | * @m: message to send |
1123 | * @dsz: length of data to be transmitted | |
c4307285 | 1124 | * |
4ccfe5e0 | 1125 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1126 | * |
4ccfe5e0 | 1127 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1128 | */ |
1b784140 | 1129 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1130 | { |
4ccfe5e0 JPM |
1131 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1132 | return -EMSGSIZE; | |
b97bf3fd | 1133 | |
1b784140 | 1134 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1135 | } |
1136 | ||
dadebc00 | 1137 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1138 | */ |
301bae56 | 1139 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1140 | u32 peer_node) |
b97bf3fd | 1141 | { |
3721e9c7 YX |
1142 | struct sock *sk = &tsk->sk; |
1143 | struct net *net = sock_net(sk); | |
301bae56 | 1144 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1145 | |
dadebc00 JPM |
1146 | msg_set_destnode(msg, peer_node); |
1147 | msg_set_destport(msg, peer_port); | |
1148 | msg_set_type(msg, TIPC_CONN_MSG); | |
1149 | msg_set_lookup_scope(msg, 0); | |
1150 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1151 | |
360aab6b | 1152 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
8ea642ee | 1153 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1154 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1155 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1156 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1157 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1158 | return; | |
1159 | ||
1160 | /* Fall back to message based flow control */ | |
1161 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1162 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1163 | } |
1164 | ||
1165 | /** | |
1166 | * set_orig_addr - capture sender's address for received message | |
1167 | * @m: descriptor for message info | |
1168 | * @msg: received message header | |
c4307285 | 1169 | * |
b97bf3fd PL |
1170 | * Note: Address is not captured if not requested by receiver. |
1171 | */ | |
05790c64 | 1172 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1173 | { |
342dfc30 | 1174 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1175 | |
c4307285 | 1176 | if (addr) { |
b97bf3fd PL |
1177 | addr->family = AF_TIPC; |
1178 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1179 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1180 | addr->addr.id.ref = msg_origport(msg); |
1181 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1182 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1183 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1184 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1185 | } | |
1186 | } | |
1187 | ||
1188 | /** | |
301bae56 | 1189 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1190 | * @m: descriptor for message info |
1191 | * @msg: received message header | |
301bae56 | 1192 | * @tsk: TIPC port associated with message |
c4307285 | 1193 | * |
b97bf3fd | 1194 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1195 | * |
b97bf3fd PL |
1196 | * Returns 0 if successful, otherwise errno |
1197 | */ | |
301bae56 JPM |
1198 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1199 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1200 | { |
1201 | u32 anc_data[3]; | |
1202 | u32 err; | |
1203 | u32 dest_type; | |
3546c750 | 1204 | int has_name; |
b97bf3fd PL |
1205 | int res; |
1206 | ||
1207 | if (likely(m->msg_controllen == 0)) | |
1208 | return 0; | |
1209 | ||
1210 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1211 | err = msg ? msg_errcode(msg) : 0; |
1212 | if (unlikely(err)) { | |
1213 | anc_data[0] = err; | |
1214 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1215 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1216 | if (res) | |
b97bf3fd | 1217 | return res; |
2db9983a AS |
1218 | if (anc_data[1]) { |
1219 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1220 | msg_data(msg)); | |
1221 | if (res) | |
1222 | return res; | |
1223 | } | |
b97bf3fd PL |
1224 | } |
1225 | ||
1226 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1227 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1228 | switch (dest_type) { | |
1229 | case TIPC_NAMED_MSG: | |
3546c750 | 1230 | has_name = 1; |
b97bf3fd PL |
1231 | anc_data[0] = msg_nametype(msg); |
1232 | anc_data[1] = msg_namelower(msg); | |
1233 | anc_data[2] = msg_namelower(msg); | |
1234 | break; | |
1235 | case TIPC_MCAST_MSG: | |
3546c750 | 1236 | has_name = 1; |
b97bf3fd PL |
1237 | anc_data[0] = msg_nametype(msg); |
1238 | anc_data[1] = msg_namelower(msg); | |
1239 | anc_data[2] = msg_nameupper(msg); | |
1240 | break; | |
1241 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1242 | has_name = (tsk->conn_type != 0); |
1243 | anc_data[0] = tsk->conn_type; | |
1244 | anc_data[1] = tsk->conn_instance; | |
1245 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1246 | break; |
1247 | default: | |
3546c750 | 1248 | has_name = 0; |
b97bf3fd | 1249 | } |
2db9983a AS |
1250 | if (has_name) { |
1251 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1252 | if (res) | |
1253 | return res; | |
1254 | } | |
b97bf3fd PL |
1255 | |
1256 | return 0; | |
1257 | } | |
1258 | ||
10724cc7 | 1259 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1260 | { |
d6fb7e9c PB |
1261 | struct sock *sk = &tsk->sk; |
1262 | struct net *net = sock_net(sk); | |
a6ca1094 | 1263 | struct sk_buff *skb = NULL; |
739f5e4e | 1264 | struct tipc_msg *msg; |
301bae56 JPM |
1265 | u32 peer_port = tsk_peer_port(tsk); |
1266 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1267 | |
d6fb7e9c | 1268 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1269 | return; |
c5898636 JPM |
1270 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1271 | dnode, tsk_own_node(tsk), peer_port, | |
1272 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1273 | if (!skb) |
739f5e4e | 1274 | return; |
a6ca1094 | 1275 | msg = buf_msg(skb); |
10724cc7 JPM |
1276 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1277 | tsk->rcv_unacked = 0; | |
1278 | ||
1279 | /* Adjust to and advertize the correct window limit */ | |
1280 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1281 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1282 | msg_set_adv_win(msg, tsk->rcv_win); | |
1283 | } | |
af9b028e | 1284 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1285 | } |
1286 | ||
85d3fc94 | 1287 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1288 | { |
1289 | struct sock *sk = sock->sk; | |
1290 | DEFINE_WAIT(wait); | |
85d3fc94 | 1291 | long timeo = *timeop; |
9bbb4ecc YX |
1292 | int err; |
1293 | ||
1294 | for (;;) { | |
1295 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1296 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1297 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1298 | err = -ENOTCONN; |
1299 | break; | |
1300 | } | |
1301 | release_sock(sk); | |
1302 | timeo = schedule_timeout(timeo); | |
1303 | lock_sock(sk); | |
1304 | } | |
1305 | err = 0; | |
1306 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1307 | break; | |
9bbb4ecc YX |
1308 | err = -EAGAIN; |
1309 | if (!timeo) | |
1310 | break; | |
143fe22f EH |
1311 | err = sock_intr_errno(timeo); |
1312 | if (signal_pending(current)) | |
1313 | break; | |
9bbb4ecc YX |
1314 | } |
1315 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1316 | *timeop = timeo; |
9bbb4ecc YX |
1317 | return err; |
1318 | } | |
1319 | ||
c4307285 | 1320 | /** |
247f0f3c | 1321 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1322 | * @m: descriptor for message info |
1323 | * @buf_len: total size of user buffer area | |
1324 | * @flags: receive flags | |
c4307285 | 1325 | * |
b97bf3fd PL |
1326 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1327 | * If the complete message doesn't fit in user area, truncate it. | |
1328 | * | |
1329 | * Returns size of returned message data, errno otherwise | |
1330 | */ | |
1b784140 YX |
1331 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1332 | int flags) | |
b97bf3fd | 1333 | { |
0c3141e9 | 1334 | struct sock *sk = sock->sk; |
58ed9442 | 1335 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1336 | struct sk_buff *buf; |
1337 | struct tipc_msg *msg; | |
c752023a | 1338 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
9bbb4ecc | 1339 | long timeo; |
b97bf3fd PL |
1340 | unsigned int sz; |
1341 | u32 err; | |
10724cc7 | 1342 | int res, hlen; |
b97bf3fd | 1343 | |
0c3141e9 | 1344 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1345 | if (unlikely(!buf_len)) |
1346 | return -EINVAL; | |
1347 | ||
0c3141e9 | 1348 | lock_sock(sk); |
b97bf3fd | 1349 | |
438adcaf | 1350 | if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1351 | res = -ENOTCONN; |
b97bf3fd PL |
1352 | goto exit; |
1353 | } | |
1354 | ||
9bbb4ecc | 1355 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1356 | restart: |
b97bf3fd | 1357 | |
0c3141e9 | 1358 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1359 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1360 | if (res) |
1361 | goto exit; | |
b97bf3fd | 1362 | |
0c3141e9 | 1363 | /* Look at first message in receive queue */ |
0c3141e9 | 1364 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1365 | msg = buf_msg(buf); |
1366 | sz = msg_data_sz(msg); | |
10724cc7 | 1367 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1368 | err = msg_errcode(msg); |
1369 | ||
b97bf3fd | 1370 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1371 | if ((!sz) && (!err)) { |
2e84c60b | 1372 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1373 | goto restart; |
1374 | } | |
1375 | ||
1376 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1377 | set_orig_addr(m, msg); |
1378 | ||
1379 | /* Capture ancillary data (optional) */ | |
301bae56 | 1380 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1381 | if (res) |
b97bf3fd PL |
1382 | goto exit; |
1383 | ||
1384 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1385 | if (!err) { |
1386 | if (unlikely(buf_len < sz)) { | |
1387 | sz = buf_len; | |
1388 | m->msg_flags |= MSG_TRUNC; | |
1389 | } | |
10724cc7 | 1390 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1391 | if (res) |
b97bf3fd | 1392 | goto exit; |
b97bf3fd PL |
1393 | res = sz; |
1394 | } else { | |
c752023a PB |
1395 | if (is_connectionless || err == TIPC_CONN_SHUTDOWN || |
1396 | m->msg_control) | |
b97bf3fd PL |
1397 | res = 0; |
1398 | else | |
1399 | res = -ECONNRESET; | |
1400 | } | |
1401 | ||
10724cc7 JPM |
1402 | if (unlikely(flags & MSG_PEEK)) |
1403 | goto exit; | |
1404 | ||
c752023a | 1405 | if (likely(!is_connectionless)) { |
10724cc7 JPM |
1406 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); |
1407 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1408 | tipc_sk_send_ack(tsk); | |
c4307285 | 1409 | } |
10724cc7 | 1410 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1411 | exit: |
0c3141e9 | 1412 | release_sock(sk); |
b97bf3fd PL |
1413 | return res; |
1414 | } | |
1415 | ||
c4307285 | 1416 | /** |
247f0f3c | 1417 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1418 | * @m: descriptor for message info |
1419 | * @buf_len: total size of user buffer area | |
1420 | * @flags: receive flags | |
c4307285 YH |
1421 | * |
1422 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1423 | * will optionally wait for more; never truncates data. |
1424 | * | |
1425 | * Returns size of returned message data, errno otherwise | |
1426 | */ | |
1b784140 YX |
1427 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1428 | size_t buf_len, int flags) | |
b97bf3fd | 1429 | { |
0c3141e9 | 1430 | struct sock *sk = sock->sk; |
58ed9442 | 1431 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1432 | struct sk_buff *buf; |
1433 | struct tipc_msg *msg; | |
9bbb4ecc | 1434 | long timeo; |
b97bf3fd | 1435 | unsigned int sz; |
ba8aebe9 | 1436 | int target; |
b97bf3fd | 1437 | int sz_copied = 0; |
b97bf3fd | 1438 | u32 err; |
10724cc7 | 1439 | int res = 0, hlen; |
b97bf3fd | 1440 | |
0c3141e9 | 1441 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1442 | if (unlikely(!buf_len)) |
1443 | return -EINVAL; | |
1444 | ||
0c3141e9 | 1445 | lock_sock(sk); |
b97bf3fd | 1446 | |
438adcaf | 1447 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1448 | res = -ENOTCONN; |
b97bf3fd PL |
1449 | goto exit; |
1450 | } | |
1451 | ||
3720d40b | 1452 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1453 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1454 | |
617d3c7a | 1455 | restart: |
0c3141e9 | 1456 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1457 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1458 | if (res) |
1459 | goto exit; | |
b97bf3fd | 1460 | |
0c3141e9 | 1461 | /* Look at first message in receive queue */ |
0c3141e9 | 1462 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1463 | msg = buf_msg(buf); |
1464 | sz = msg_data_sz(msg); | |
10724cc7 | 1465 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1466 | err = msg_errcode(msg); |
1467 | ||
1468 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1469 | if ((!sz) && (!err)) { |
2e84c60b | 1470 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1471 | goto restart; |
1472 | } | |
1473 | ||
1474 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1475 | if (sz_copied == 0) { |
1476 | set_orig_addr(m, msg); | |
301bae56 | 1477 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1478 | if (res) |
b97bf3fd PL |
1479 | goto exit; |
1480 | } | |
1481 | ||
1482 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1483 | if (!err) { |
ba8aebe9 PB |
1484 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1485 | u32 needed; | |
1486 | int sz_to_copy; | |
b97bf3fd | 1487 | |
0232fd0a | 1488 | sz -= offset; |
b97bf3fd | 1489 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1490 | sz_to_copy = min(sz, needed); |
0232fd0a | 1491 | |
10724cc7 | 1492 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1493 | if (res) |
b97bf3fd | 1494 | goto exit; |
0232fd0a | 1495 | |
b97bf3fd PL |
1496 | sz_copied += sz_to_copy; |
1497 | ||
1498 | if (sz_to_copy < sz) { | |
1499 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1500 | TIPC_SKB_CB(buf)->bytes_read = |
1501 | offset + sz_to_copy; | |
b97bf3fd PL |
1502 | goto exit; |
1503 | } | |
b97bf3fd PL |
1504 | } else { |
1505 | if (sz_copied != 0) | |
1506 | goto exit; /* can't add error msg to valid data */ | |
1507 | ||
1508 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1509 | res = 0; | |
1510 | else | |
1511 | res = -ECONNRESET; | |
1512 | } | |
1513 | ||
10724cc7 JPM |
1514 | if (unlikely(flags & MSG_PEEK)) |
1515 | goto exit; | |
1516 | ||
1517 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1518 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1519 | tipc_sk_send_ack(tsk); | |
1520 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1521 | |
1522 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1523 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1524 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1525 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1526 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1527 | goto restart; |
1528 | ||
1529 | exit: | |
0c3141e9 | 1530 | release_sock(sk); |
a3b0a5a9 | 1531 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1532 | } |
1533 | ||
f288bef4 YX |
1534 | /** |
1535 | * tipc_write_space - wake up thread if port congestion is released | |
1536 | * @sk: socket | |
1537 | */ | |
1538 | static void tipc_write_space(struct sock *sk) | |
1539 | { | |
1540 | struct socket_wq *wq; | |
1541 | ||
1542 | rcu_read_lock(); | |
1543 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1544 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1545 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1546 | POLLWRNORM | POLLWRBAND); | |
1547 | rcu_read_unlock(); | |
1548 | } | |
1549 | ||
1550 | /** | |
1551 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1552 | * @sk: socket | |
1553 | * @len: the length of messages | |
1554 | */ | |
676d2369 | 1555 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1556 | { |
1557 | struct socket_wq *wq; | |
1558 | ||
1559 | rcu_read_lock(); | |
1560 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1561 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1562 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1563 | POLLRDNORM | POLLRDBAND); | |
1564 | rcu_read_unlock(); | |
1565 | } | |
1566 | ||
f4195d1e YX |
1567 | static void tipc_sock_destruct(struct sock *sk) |
1568 | { | |
1569 | __skb_queue_purge(&sk->sk_receive_queue); | |
1570 | } | |
1571 | ||
7e6c131e YX |
1572 | /** |
1573 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1574 | * @tsk: TIPC socket |
1186adf7 | 1575 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1576 | * |
cda3696d | 1577 | * Returns true if everything ok, false otherwise |
7e6c131e | 1578 | */ |
cda3696d | 1579 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1580 | { |
58ed9442 | 1581 | struct sock *sk = &tsk->sk; |
f2f9800d | 1582 | struct net *net = sock_net(sk); |
cda3696d | 1583 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1584 | |
cda3696d JPM |
1585 | if (unlikely(msg_mcast(hdr))) |
1586 | return false; | |
7e6c131e | 1587 | |
99a20889 PB |
1588 | switch (sk->sk_state) { |
1589 | case TIPC_CONNECTING: | |
cda3696d JPM |
1590 | /* Accept only ACK or NACK message */ |
1591 | if (unlikely(!msg_connected(hdr))) | |
1592 | return false; | |
dadebc00 | 1593 | |
cda3696d | 1594 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1595 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1596 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1597 | return true; |
584d24b3 YX |
1598 | } |
1599 | ||
cda3696d | 1600 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1601 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1602 | sk->sk_err = EINVAL; |
cda3696d | 1603 | return true; |
584d24b3 YX |
1604 | } |
1605 | ||
cda3696d JPM |
1606 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1607 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 1608 | |
cda3696d JPM |
1609 | /* If 'ACK+' message, add to socket receive queue */ |
1610 | if (msg_data_sz(hdr)) | |
1611 | return true; | |
1612 | ||
1613 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1614 | if (waitqueue_active(sk_sleep(sk))) | |
1615 | wake_up_interruptible(sk_sleep(sk)); | |
1616 | ||
1617 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1618 | msg_set_dest_droppable(hdr, 1); | |
1619 | return false; | |
cda3696d | 1620 | |
438adcaf | 1621 | case TIPC_OPEN: |
9fd4b070 | 1622 | case TIPC_DISCONNECTING: |
438adcaf PB |
1623 | break; |
1624 | case TIPC_LISTEN: | |
7e6c131e | 1625 | /* Accept only SYN message */ |
cda3696d JPM |
1626 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1627 | return true; | |
7e6c131e | 1628 | break; |
f40acbaf PB |
1629 | case TIPC_ESTABLISHED: |
1630 | /* Accept only connection-based messages sent by peer */ | |
1631 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
1632 | return false; | |
1633 | ||
1634 | if (unlikely(msg_errcode(hdr))) { | |
1635 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1636 | /* Let timer expire on it's own */ | |
1637 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1638 | tsk->portid); | |
1639 | sk->sk_state_change(sk); | |
1640 | } | |
1641 | return true; | |
7e6c131e | 1642 | default: |
438adcaf | 1643 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 1644 | } |
438adcaf | 1645 | |
cda3696d | 1646 | return false; |
7e6c131e YX |
1647 | } |
1648 | ||
aba79f33 YX |
1649 | /** |
1650 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1651 | * @sk: socket | |
10724cc7 | 1652 | * @skb: message |
aba79f33 | 1653 | * |
10724cc7 JPM |
1654 | * For connection oriented messages, irrespective of importance, |
1655 | * default queue limit is 2 MB. | |
aba79f33 | 1656 | * |
10724cc7 JPM |
1657 | * For connectionless messages, queue limits are based on message |
1658 | * importance as follows: | |
aba79f33 | 1659 | * |
10724cc7 JPM |
1660 | * TIPC_LOW_IMPORTANCE (2 MB) |
1661 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1662 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1663 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1664 | * |
1665 | * Returns overload limit according to corresponding message importance | |
1666 | */ | |
10724cc7 | 1667 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1668 | { |
10724cc7 JPM |
1669 | struct tipc_sock *tsk = tipc_sk(sk); |
1670 | struct tipc_msg *hdr = buf_msg(skb); | |
1671 | ||
1672 | if (unlikely(!msg_connected(hdr))) | |
1673 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1674 | |
10724cc7 JPM |
1675 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1676 | return sk->sk_rcvbuf; | |
0cee6bbe | 1677 | |
10724cc7 | 1678 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1679 | } |
1680 | ||
c4307285 | 1681 | /** |
0c3141e9 AS |
1682 | * filter_rcv - validate incoming message |
1683 | * @sk: socket | |
cda3696d | 1684 | * @skb: pointer to message. |
c4307285 | 1685 | * |
0c3141e9 AS |
1686 | * Enqueues message on receive queue if acceptable; optionally handles |
1687 | * disconnect indication for a connected socket. | |
1688 | * | |
1186adf7 | 1689 | * Called with socket lock already taken |
c4307285 | 1690 | * |
cda3696d | 1691 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1692 | */ |
f1d048f2 JPM |
1693 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1694 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1695 | { |
58ed9442 | 1696 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1697 | struct tipc_msg *hdr = buf_msg(skb); |
1698 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1699 | int err = TIPC_OK; | |
1700 | int usr = msg_user(hdr); | |
b97bf3fd | 1701 | |
cda3696d | 1702 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1703 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1704 | return false; |
1186adf7 | 1705 | } |
ec8a2e56 | 1706 | |
cda3696d JPM |
1707 | if (unlikely(usr == SOCK_WAKEUP)) { |
1708 | kfree_skb(skb); | |
50100a5e JPM |
1709 | tsk->link_cong = 0; |
1710 | sk->sk_write_space(sk); | |
cda3696d | 1711 | return false; |
50100a5e JPM |
1712 | } |
1713 | ||
cda3696d JPM |
1714 | /* Drop if illegal message type */ |
1715 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1716 | kfree_skb(skb); | |
1717 | return false; | |
1718 | } | |
0c3141e9 | 1719 | |
cda3696d | 1720 | /* Reject if wrong message type for current socket state */ |
c752023a | 1721 | if (tipc_sk_type_connectionless(sk)) { |
cda3696d JPM |
1722 | if (msg_connected(hdr)) { |
1723 | err = TIPC_ERR_NO_PORT; | |
1724 | goto reject; | |
1725 | } | |
1726 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1727 | err = TIPC_ERR_NO_PORT; | |
1728 | goto reject; | |
b97bf3fd PL |
1729 | } |
1730 | ||
1731 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1732 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1733 | err = TIPC_ERR_OVERLOAD; | |
1734 | goto reject; | |
1735 | } | |
b97bf3fd | 1736 | |
aba79f33 | 1737 | /* Enqueue message */ |
ba8aebe9 | 1738 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1739 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1740 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1741 | |
676d2369 | 1742 | sk->sk_data_ready(sk); |
cda3696d JPM |
1743 | return true; |
1744 | ||
1745 | reject: | |
f1d048f2 JPM |
1746 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1747 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1748 | return false; |
0c3141e9 | 1749 | } |
b97bf3fd | 1750 | |
0c3141e9 | 1751 | /** |
4f4482dc | 1752 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1753 | * @sk: socket |
a6ca1094 | 1754 | * @skb: message |
0c3141e9 | 1755 | * |
e3a77561 | 1756 | * Caller must hold socket lock |
0c3141e9 AS |
1757 | * |
1758 | * Returns 0 | |
1759 | */ | |
a6ca1094 | 1760 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1761 | { |
cda3696d | 1762 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1763 | struct sk_buff_head xmitq; |
1764 | u32 dnode, selector; | |
0c3141e9 | 1765 | |
f1d048f2 JPM |
1766 | __skb_queue_head_init(&xmitq); |
1767 | ||
1768 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1769 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1770 | return 0; |
1771 | } | |
1772 | ||
1773 | if (skb_queue_empty(&xmitq)) | |
1774 | return 0; | |
1775 | ||
1776 | /* Send response/rejected message */ | |
1777 | skb = __skb_dequeue(&xmitq); | |
1778 | dnode = msg_destnode(buf_msg(skb)); | |
1779 | selector = msg_origport(buf_msg(skb)); | |
1780 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1781 | return 0; |
1782 | } | |
1783 | ||
d570d864 | 1784 | /** |
c637c103 JPM |
1785 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1786 | * inputq and try adding them to socket or backlog queue | |
1787 | * @inputq: list of incoming buffers with potentially different destinations | |
1788 | * @sk: socket where the buffers should be enqueued | |
1789 | * @dport: port number for the socket | |
d570d864 JPM |
1790 | * |
1791 | * Caller must hold socket lock | |
d570d864 | 1792 | */ |
cda3696d | 1793 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1794 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1795 | { |
f1d048f2 JPM |
1796 | unsigned long time_limit = jiffies + 2; |
1797 | struct sk_buff *skb; | |
d570d864 JPM |
1798 | unsigned int lim; |
1799 | atomic_t *dcnt; | |
f1d048f2 | 1800 | u32 onode; |
c637c103 JPM |
1801 | |
1802 | while (skb_queue_len(inputq)) { | |
51a00daf | 1803 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1804 | return; |
1805 | ||
c637c103 JPM |
1806 | skb = tipc_skb_dequeue(inputq, dport); |
1807 | if (unlikely(!skb)) | |
cda3696d JPM |
1808 | return; |
1809 | ||
1810 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1811 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1812 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1813 | continue; |
c637c103 | 1814 | } |
cda3696d JPM |
1815 | |
1816 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1817 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1818 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1819 | atomic_set(dcnt, 0); |
1820 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1821 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1822 | continue; | |
cda3696d JPM |
1823 | |
1824 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1825 | onode = tipc_own_addr(sock_net(sk)); |
1826 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1827 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1828 | break; |
c637c103 | 1829 | } |
d570d864 JPM |
1830 | } |
1831 | ||
0c3141e9 | 1832 | /** |
c637c103 JPM |
1833 | * tipc_sk_rcv - handle a chain of incoming buffers |
1834 | * @inputq: buffer list containing the buffers | |
1835 | * Consumes all buffers in list until inputq is empty | |
1836 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1837 | */ |
cda3696d | 1838 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1839 | { |
f1d048f2 | 1840 | struct sk_buff_head xmitq; |
c637c103 | 1841 | u32 dnode, dport = 0; |
9871b27f | 1842 | int err; |
9816f061 | 1843 | struct tipc_sock *tsk; |
9816f061 | 1844 | struct sock *sk; |
cda3696d | 1845 | struct sk_buff *skb; |
9816f061 | 1846 | |
f1d048f2 | 1847 | __skb_queue_head_init(&xmitq); |
c637c103 | 1848 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1849 | dport = tipc_skb_peek_port(inputq, dport); |
1850 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1851 | |
c637c103 JPM |
1852 | if (likely(tsk)) { |
1853 | sk = &tsk->sk; | |
1854 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1855 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1856 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1857 | } |
f1d048f2 JPM |
1858 | /* Send pending response/rejected messages, if any */ |
1859 | while ((skb = __skb_dequeue(&xmitq))) { | |
1860 | dnode = msg_destnode(buf_msg(skb)); | |
1861 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1862 | } | |
c637c103 | 1863 | sock_put(sk); |
c637c103 | 1864 | continue; |
c637c103 | 1865 | } |
cda3696d JPM |
1866 | |
1867 | /* No destination socket => dequeue skb if still there */ | |
1868 | skb = tipc_skb_dequeue(inputq, dport); | |
1869 | if (!skb) | |
1870 | return; | |
1871 | ||
1872 | /* Try secondary lookup if unresolved named message */ | |
1873 | err = TIPC_ERR_NO_PORT; | |
1874 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1875 | goto xmit; | |
1876 | ||
1877 | /* Prepare for message rejection */ | |
1878 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1879 | continue; |
e3a77561 | 1880 | xmit: |
cda3696d | 1881 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1882 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1883 | } |
b97bf3fd PL |
1884 | } |
1885 | ||
78eb3a53 YX |
1886 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1887 | { | |
d9dc8b0f | 1888 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 1889 | struct sock *sk = sock->sk; |
78eb3a53 YX |
1890 | int done; |
1891 | ||
1892 | do { | |
1893 | int err = sock_error(sk); | |
1894 | if (err) | |
1895 | return err; | |
1896 | if (!*timeo_p) | |
1897 | return -ETIMEDOUT; | |
1898 | if (signal_pending(current)) | |
1899 | return sock_intr_errno(*timeo_p); | |
1900 | ||
d9dc8b0f | 1901 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 1902 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
1903 | sk->sk_state != TIPC_CONNECTING, &wait); |
1904 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
1905 | } while (!done); |
1906 | return 0; | |
1907 | } | |
1908 | ||
b97bf3fd | 1909 | /** |
247f0f3c | 1910 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1911 | * @sock: socket structure |
1912 | * @dest: socket address for destination port | |
1913 | * @destlen: size of socket address data structure | |
0c3141e9 | 1914 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1915 | * |
1916 | * Returns 0 on success, errno otherwise | |
1917 | */ | |
247f0f3c YX |
1918 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1919 | int destlen, int flags) | |
b97bf3fd | 1920 | { |
0c3141e9 | 1921 | struct sock *sk = sock->sk; |
f2f8036e | 1922 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1923 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1924 | struct msghdr m = {NULL,}; | |
f2f8036e | 1925 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 1926 | int previous; |
f2f8036e | 1927 | int res = 0; |
b89741a0 | 1928 | |
0c3141e9 AS |
1929 | lock_sock(sk); |
1930 | ||
f2f8036e | 1931 | /* DGRAM/RDM connect(), just save the destaddr */ |
c752023a | 1932 | if (tipc_sk_type_connectionless(sk)) { |
f2f8036e | 1933 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1934 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1935 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1936 | res = -EINVAL; | |
f2f8036e | 1937 | } else { |
aeda16b6 | 1938 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1939 | } |
0c3141e9 AS |
1940 | goto exit; |
1941 | } | |
b89741a0 | 1942 | |
b89741a0 AS |
1943 | /* |
1944 | * Reject connection attempt using multicast address | |
1945 | * | |
1946 | * Note: send_msg() validates the rest of the address fields, | |
1947 | * so there's no need to do it here | |
1948 | */ | |
0c3141e9 AS |
1949 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1950 | res = -EINVAL; | |
1951 | goto exit; | |
1952 | } | |
1953 | ||
99a20889 | 1954 | previous = sk->sk_state; |
438adcaf PB |
1955 | |
1956 | switch (sk->sk_state) { | |
1957 | case TIPC_OPEN: | |
584d24b3 YX |
1958 | /* Send a 'SYN-' to destination */ |
1959 | m.msg_name = dest; | |
1960 | m.msg_namelen = destlen; | |
1961 | ||
1962 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1963 | * indicate send_msg() is never blocked. | |
1964 | */ | |
1965 | if (!timeout) | |
1966 | m.msg_flags = MSG_DONTWAIT; | |
1967 | ||
39a0295f | 1968 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1969 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1970 | goto exit; | |
1971 | ||
99a20889 | 1972 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
1973 | * difference is that return value in non-blocking |
1974 | * case is EINPROGRESS, rather than EALREADY. | |
1975 | */ | |
1976 | res = -EINPROGRESS; | |
99a20889 PB |
1977 | /* fall thru' */ |
1978 | case TIPC_CONNECTING: | |
1979 | if (!timeout) { | |
1980 | if (previous == TIPC_CONNECTING) | |
1981 | res = -EALREADY; | |
78eb3a53 | 1982 | goto exit; |
99a20889 | 1983 | } |
78eb3a53 YX |
1984 | timeout = msecs_to_jiffies(timeout); |
1985 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1986 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
1987 | break; |
1988 | case TIPC_ESTABLISHED: | |
584d24b3 | 1989 | res = -EISCONN; |
f40acbaf PB |
1990 | break; |
1991 | default: | |
584d24b3 | 1992 | res = -EINVAL; |
f40acbaf | 1993 | } |
99a20889 | 1994 | |
0c3141e9 AS |
1995 | exit: |
1996 | release_sock(sk); | |
b89741a0 | 1997 | return res; |
b97bf3fd PL |
1998 | } |
1999 | ||
c4307285 | 2000 | /** |
247f0f3c | 2001 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2002 | * @sock: socket structure |
2003 | * @len: (unused) | |
c4307285 | 2004 | * |
b97bf3fd PL |
2005 | * Returns 0 on success, errno otherwise |
2006 | */ | |
247f0f3c | 2007 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2008 | { |
0c3141e9 AS |
2009 | struct sock *sk = sock->sk; |
2010 | int res; | |
2011 | ||
2012 | lock_sock(sk); | |
0c288c86 | 2013 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2014 | release_sock(sk); |
0c288c86 | 2015 | |
0c3141e9 | 2016 | return res; |
b97bf3fd PL |
2017 | } |
2018 | ||
6398e23c YX |
2019 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2020 | { | |
2021 | struct sock *sk = sock->sk; | |
2022 | DEFINE_WAIT(wait); | |
2023 | int err; | |
2024 | ||
2025 | /* True wake-one mechanism for incoming connections: only | |
2026 | * one process gets woken up, not the 'whole herd'. | |
2027 | * Since we do not 'race & poll' for established sockets | |
2028 | * anymore, the common case will execute the loop only once. | |
2029 | */ | |
2030 | for (;;) { | |
2031 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2032 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2033 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2034 | release_sock(sk); |
2035 | timeo = schedule_timeout(timeo); | |
2036 | lock_sock(sk); | |
2037 | } | |
2038 | err = 0; | |
2039 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2040 | break; | |
6398e23c YX |
2041 | err = -EAGAIN; |
2042 | if (!timeo) | |
2043 | break; | |
143fe22f EH |
2044 | err = sock_intr_errno(timeo); |
2045 | if (signal_pending(current)) | |
2046 | break; | |
6398e23c YX |
2047 | } |
2048 | finish_wait(sk_sleep(sk), &wait); | |
2049 | return err; | |
2050 | } | |
2051 | ||
c4307285 | 2052 | /** |
247f0f3c | 2053 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2054 | * @sock: listening socket |
2055 | * @newsock: new socket that is to be connected | |
2056 | * @flags: file-related flags associated with socket | |
c4307285 | 2057 | * |
b97bf3fd PL |
2058 | * Returns 0 on success, errno otherwise |
2059 | */ | |
247f0f3c | 2060 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2061 | { |
0fef8f20 | 2062 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2063 | struct sk_buff *buf; |
301bae56 | 2064 | struct tipc_sock *new_tsock; |
0fef8f20 | 2065 | struct tipc_msg *msg; |
6398e23c | 2066 | long timeo; |
0c3141e9 | 2067 | int res; |
b97bf3fd | 2068 | |
0c3141e9 | 2069 | lock_sock(sk); |
b97bf3fd | 2070 | |
0c288c86 | 2071 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2072 | res = -EINVAL; |
b97bf3fd PL |
2073 | goto exit; |
2074 | } | |
6398e23c YX |
2075 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2076 | res = tipc_wait_for_accept(sock, timeo); | |
2077 | if (res) | |
2078 | goto exit; | |
0c3141e9 AS |
2079 | |
2080 | buf = skb_peek(&sk->sk_receive_queue); | |
2081 | ||
cb5da847 | 2082 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2083 | if (res) |
2084 | goto exit; | |
fdd75ea8 | 2085 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2086 | |
0fef8f20 | 2087 | new_sk = new_sock->sk; |
301bae56 | 2088 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2089 | msg = buf_msg(buf); |
b97bf3fd | 2090 | |
0fef8f20 PG |
2091 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2092 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2093 | ||
2094 | /* | |
2095 | * Reject any stray messages received by new socket | |
2096 | * before the socket lock was taken (very, very unlikely) | |
2097 | */ | |
2e84c60b | 2098 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2099 | |
2100 | /* Connect new socket to it's peer */ | |
301bae56 | 2101 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2102 | |
301bae56 | 2103 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2104 | if (msg_named(msg)) { |
301bae56 JPM |
2105 | new_tsock->conn_type = msg_nametype(msg); |
2106 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2107 | } |
0fef8f20 PG |
2108 | |
2109 | /* | |
2110 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2111 | * Respond to 'SYN+' by queuing it on new socket. | |
2112 | */ | |
2113 | if (!msg_data_sz(msg)) { | |
2114 | struct msghdr m = {NULL,}; | |
2115 | ||
2e84c60b | 2116 | tsk_advance_rx_queue(sk); |
39a0295f | 2117 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2118 | } else { |
2119 | __skb_dequeue(&sk->sk_receive_queue); | |
2120 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2121 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2122 | } |
2123 | release_sock(new_sk); | |
b97bf3fd | 2124 | exit: |
0c3141e9 | 2125 | release_sock(sk); |
b97bf3fd PL |
2126 | return res; |
2127 | } | |
2128 | ||
2129 | /** | |
247f0f3c | 2130 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2131 | * @sock: socket structure |
e247a8f5 | 2132 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2133 | * |
2134 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2135 | * |
b97bf3fd PL |
2136 | * Returns 0 on success, errno otherwise |
2137 | */ | |
247f0f3c | 2138 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2139 | { |
0c3141e9 | 2140 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2141 | int res; |
2142 | ||
e247a8f5 AS |
2143 | if (how != SHUT_RDWR) |
2144 | return -EINVAL; | |
b97bf3fd | 2145 | |
0c3141e9 | 2146 | lock_sock(sk); |
b97bf3fd | 2147 | |
6f00089c PB |
2148 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2149 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2150 | |
6f00089c | 2151 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2152 | /* Discard any unreceived messages */ |
57467e56 | 2153 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2154 | |
2155 | /* Wake up anyone sleeping in poll */ | |
2156 | sk->sk_state_change(sk); | |
b97bf3fd | 2157 | res = 0; |
6f00089c | 2158 | } else { |
b97bf3fd PL |
2159 | res = -ENOTCONN; |
2160 | } | |
2161 | ||
0c3141e9 | 2162 | release_sock(sk); |
b97bf3fd PL |
2163 | return res; |
2164 | } | |
2165 | ||
f2f2a96a | 2166 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2167 | { |
f2f2a96a YX |
2168 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2169 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2170 | struct sk_buff *skb = NULL; |
57289015 | 2171 | u32 peer_port, peer_node; |
c5898636 | 2172 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2173 | |
6c9808ce | 2174 | bh_lock_sock(sk); |
d6fb7e9c | 2175 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2176 | bh_unlock_sock(sk); |
2177 | goto exit; | |
57289015 | 2178 | } |
301bae56 JPM |
2179 | peer_port = tsk_peer_port(tsk); |
2180 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2181 | |
8ea642ee | 2182 | if (tsk->probe_unacked) { |
b3be5e3e | 2183 | if (!sock_owned_by_user(sk)) { |
9fd4b070 | 2184 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
b3be5e3e EH |
2185 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2186 | tsk_peer_port(tsk)); | |
2187 | sk->sk_state_change(sk); | |
2188 | } else { | |
2189 | /* Try again later */ | |
2190 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2191 | } | |
2192 | ||
360aab6b PB |
2193 | bh_unlock_sock(sk); |
2194 | goto exit; | |
57289015 | 2195 | } |
360aab6b PB |
2196 | |
2197 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, | |
2198 | INT_H_SIZE, 0, peer_node, own_node, | |
2199 | peer_port, tsk->portid, TIPC_OK); | |
8ea642ee | 2200 | tsk->probe_unacked = true; |
360aab6b | 2201 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
57289015 | 2202 | bh_unlock_sock(sk); |
a6ca1094 | 2203 | if (skb) |
af9b028e | 2204 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2205 | exit: |
07f6c4bc | 2206 | sock_put(sk); |
57289015 JPM |
2207 | } |
2208 | ||
301bae56 | 2209 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2210 | struct tipc_name_seq const *seq) |
2211 | { | |
d6fb7e9c PB |
2212 | struct sock *sk = &tsk->sk; |
2213 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2214 | struct publication *publ; |
2215 | u32 key; | |
2216 | ||
d6fb7e9c | 2217 | if (tipc_sk_connected(sk)) |
0fc87aae | 2218 | return -EINVAL; |
07f6c4bc YX |
2219 | key = tsk->portid + tsk->pub_count + 1; |
2220 | if (key == tsk->portid) | |
0fc87aae JPM |
2221 | return -EADDRINUSE; |
2222 | ||
f2f9800d | 2223 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2224 | scope, tsk->portid, key); |
0fc87aae JPM |
2225 | if (unlikely(!publ)) |
2226 | return -EINVAL; | |
2227 | ||
301bae56 JPM |
2228 | list_add(&publ->pport_list, &tsk->publications); |
2229 | tsk->pub_count++; | |
2230 | tsk->published = 1; | |
0fc87aae JPM |
2231 | return 0; |
2232 | } | |
2233 | ||
301bae56 | 2234 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2235 | struct tipc_name_seq const *seq) |
2236 | { | |
f2f9800d | 2237 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2238 | struct publication *publ; |
2239 | struct publication *safe; | |
2240 | int rc = -EINVAL; | |
2241 | ||
301bae56 | 2242 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2243 | if (seq) { |
2244 | if (publ->scope != scope) | |
2245 | continue; | |
2246 | if (publ->type != seq->type) | |
2247 | continue; | |
2248 | if (publ->lower != seq->lower) | |
2249 | continue; | |
2250 | if (publ->upper != seq->upper) | |
2251 | break; | |
f2f9800d | 2252 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2253 | publ->ref, publ->key); |
2254 | rc = 0; | |
2255 | break; | |
2256 | } | |
f2f9800d | 2257 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2258 | publ->ref, publ->key); |
2259 | rc = 0; | |
2260 | } | |
301bae56 JPM |
2261 | if (list_empty(&tsk->publications)) |
2262 | tsk->published = 0; | |
0fc87aae JPM |
2263 | return rc; |
2264 | } | |
2265 | ||
5a9ee0be JPM |
2266 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2267 | * when we go from standalone to network mode. | |
2268 | */ | |
e05b31f4 | 2269 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2270 | { |
e05b31f4 | 2271 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2272 | const struct bucket_table *tbl; |
2273 | struct rhash_head *pos; | |
2274 | struct tipc_sock *tsk; | |
5a9ee0be | 2275 | struct tipc_msg *msg; |
07f6c4bc | 2276 | int i; |
5a9ee0be | 2277 | |
07f6c4bc | 2278 | rcu_read_lock(); |
e05b31f4 | 2279 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2280 | for (i = 0; i < tbl->size; i++) { |
2281 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2282 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2283 | msg = &tsk->phdr; | |
34747539 YX |
2284 | msg_set_prevnode(msg, tn->own_addr); |
2285 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2286 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2287 | } | |
5a9ee0be | 2288 | } |
07f6c4bc | 2289 | rcu_read_unlock(); |
5a9ee0be JPM |
2290 | } |
2291 | ||
e05b31f4 | 2292 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2293 | { |
e05b31f4 | 2294 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2295 | struct tipc_sock *tsk; |
808d90f9 | 2296 | |
07f6c4bc | 2297 | rcu_read_lock(); |
6cca7289 | 2298 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2299 | if (tsk) |
2300 | sock_hold(&tsk->sk); | |
2301 | rcu_read_unlock(); | |
808d90f9 | 2302 | |
07f6c4bc | 2303 | return tsk; |
808d90f9 JPM |
2304 | } |
2305 | ||
07f6c4bc | 2306 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2307 | { |
e05b31f4 YX |
2308 | struct sock *sk = &tsk->sk; |
2309 | struct net *net = sock_net(sk); | |
2310 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2311 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2312 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2313 | |
07f6c4bc YX |
2314 | while (remaining--) { |
2315 | portid++; | |
2316 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2317 | portid = TIPC_MIN_PORT; | |
2318 | tsk->portid = portid; | |
2319 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2320 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2321 | tsk_rht_params)) | |
07f6c4bc YX |
2322 | return 0; |
2323 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2324 | } |
2325 | ||
07f6c4bc | 2326 | return -1; |
808d90f9 JPM |
2327 | } |
2328 | ||
07f6c4bc | 2329 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2330 | { |
07f6c4bc | 2331 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2332 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2333 | |
6cca7289 | 2334 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2335 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2336 | __sock_put(sk); | |
808d90f9 | 2337 | } |
808d90f9 JPM |
2338 | } |
2339 | ||
6cca7289 HX |
2340 | static const struct rhashtable_params tsk_rht_params = { |
2341 | .nelem_hint = 192, | |
2342 | .head_offset = offsetof(struct tipc_sock, node), | |
2343 | .key_offset = offsetof(struct tipc_sock, portid), | |
2344 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2345 | .max_size = 1048576, |
2346 | .min_size = 256, | |
b5e2c150 | 2347 | .automatic_shrinking = true, |
6cca7289 HX |
2348 | }; |
2349 | ||
e05b31f4 | 2350 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2351 | { |
e05b31f4 | 2352 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2353 | |
2354 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2355 | } |
2356 | ||
e05b31f4 | 2357 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2358 | { |
e05b31f4 YX |
2359 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2360 | ||
07f6c4bc YX |
2361 | /* Wait for socket readers to complete */ |
2362 | synchronize_net(); | |
808d90f9 | 2363 | |
e05b31f4 | 2364 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2365 | } |
2366 | ||
b97bf3fd | 2367 | /** |
247f0f3c | 2368 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2369 | * @sock: socket structure |
2370 | * @lvl: option level | |
2371 | * @opt: option identifier | |
2372 | * @ov: pointer to new option value | |
2373 | * @ol: length of option value | |
c4307285 YH |
2374 | * |
2375 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2376 | * (to ease compatibility). |
c4307285 | 2377 | * |
b97bf3fd PL |
2378 | * Returns 0 on success, errno otherwise |
2379 | */ | |
247f0f3c YX |
2380 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2381 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2382 | { |
0c3141e9 | 2383 | struct sock *sk = sock->sk; |
58ed9442 | 2384 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2385 | u32 value; |
2386 | int res; | |
2387 | ||
c4307285 YH |
2388 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2389 | return 0; | |
b97bf3fd PL |
2390 | if (lvl != SOL_TIPC) |
2391 | return -ENOPROTOOPT; | |
2392 | if (ol < sizeof(value)) | |
2393 | return -EINVAL; | |
2db9983a AS |
2394 | res = get_user(value, (u32 __user *)ov); |
2395 | if (res) | |
b97bf3fd PL |
2396 | return res; |
2397 | ||
0c3141e9 | 2398 | lock_sock(sk); |
c4307285 | 2399 | |
b97bf3fd PL |
2400 | switch (opt) { |
2401 | case TIPC_IMPORTANCE: | |
301bae56 | 2402 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2403 | break; |
2404 | case TIPC_SRC_DROPPABLE: | |
2405 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2406 | tsk_set_unreliable(tsk, value); |
c4307285 | 2407 | else |
b97bf3fd PL |
2408 | res = -ENOPROTOOPT; |
2409 | break; | |
2410 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2411 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2412 | break; |
2413 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2414 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2415 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2416 | break; |
2417 | default: | |
2418 | res = -EINVAL; | |
2419 | } | |
2420 | ||
0c3141e9 AS |
2421 | release_sock(sk); |
2422 | ||
b97bf3fd PL |
2423 | return res; |
2424 | } | |
2425 | ||
2426 | /** | |
247f0f3c | 2427 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2428 | * @sock: socket structure |
2429 | * @lvl: option level | |
2430 | * @opt: option identifier | |
2431 | * @ov: receptacle for option value | |
2432 | * @ol: receptacle for length of option value | |
c4307285 YH |
2433 | * |
2434 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2435 | * (to ease compatibility). |
c4307285 | 2436 | * |
b97bf3fd PL |
2437 | * Returns 0 on success, errno otherwise |
2438 | */ | |
247f0f3c YX |
2439 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2440 | char __user *ov, int __user *ol) | |
b97bf3fd | 2441 | { |
0c3141e9 | 2442 | struct sock *sk = sock->sk; |
58ed9442 | 2443 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2444 | int len; |
b97bf3fd | 2445 | u32 value; |
c4307285 | 2446 | int res; |
b97bf3fd | 2447 | |
c4307285 YH |
2448 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2449 | return put_user(0, ol); | |
b97bf3fd PL |
2450 | if (lvl != SOL_TIPC) |
2451 | return -ENOPROTOOPT; | |
2db9983a AS |
2452 | res = get_user(len, ol); |
2453 | if (res) | |
c4307285 | 2454 | return res; |
b97bf3fd | 2455 | |
0c3141e9 | 2456 | lock_sock(sk); |
b97bf3fd PL |
2457 | |
2458 | switch (opt) { | |
2459 | case TIPC_IMPORTANCE: | |
301bae56 | 2460 | value = tsk_importance(tsk); |
b97bf3fd PL |
2461 | break; |
2462 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2463 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2464 | break; |
2465 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2466 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2467 | break; |
2468 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2469 | value = tsk->conn_timeout; |
0c3141e9 | 2470 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2471 | break; |
0e65967e | 2472 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2473 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2474 | break; |
0e65967e | 2475 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2476 | value = skb_queue_len(&sk->sk_receive_queue); |
2477 | break; | |
b97bf3fd PL |
2478 | default: |
2479 | res = -EINVAL; | |
2480 | } | |
2481 | ||
0c3141e9 AS |
2482 | release_sock(sk); |
2483 | ||
25860c3b PG |
2484 | if (res) |
2485 | return res; /* "get" failed */ | |
b97bf3fd | 2486 | |
25860c3b PG |
2487 | if (len < sizeof(value)) |
2488 | return -EINVAL; | |
2489 | ||
2490 | if (copy_to_user(ov, &value, sizeof(value))) | |
2491 | return -EFAULT; | |
2492 | ||
2493 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2494 | } |
2495 | ||
f2f9800d | 2496 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2497 | { |
f2f9800d | 2498 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2499 | struct tipc_sioc_ln_req lnr; |
2500 | void __user *argp = (void __user *)arg; | |
2501 | ||
2502 | switch (cmd) { | |
2503 | case SIOCGETLINKNAME: | |
2504 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2505 | return -EFAULT; | |
f2f9800d YX |
2506 | if (!tipc_node_get_linkname(sock_net(sk), |
2507 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2508 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2509 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2510 | return -EFAULT; | |
2511 | return 0; | |
2512 | } | |
2513 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2514 | default: |
2515 | return -ENOIOCTLCMD; | |
2516 | } | |
2517 | } | |
2518 | ||
ae86b9e3 BH |
2519 | /* Protocol switches for the various types of TIPC sockets */ |
2520 | ||
bca65eae | 2521 | static const struct proto_ops msg_ops = { |
0e65967e | 2522 | .owner = THIS_MODULE, |
b97bf3fd | 2523 | .family = AF_TIPC, |
247f0f3c YX |
2524 | .release = tipc_release, |
2525 | .bind = tipc_bind, | |
2526 | .connect = tipc_connect, | |
5eee6a6d | 2527 | .socketpair = sock_no_socketpair, |
245f3d34 | 2528 | .accept = sock_no_accept, |
247f0f3c YX |
2529 | .getname = tipc_getname, |
2530 | .poll = tipc_poll, | |
78acb1f9 | 2531 | .ioctl = tipc_ioctl, |
245f3d34 | 2532 | .listen = sock_no_listen, |
247f0f3c YX |
2533 | .shutdown = tipc_shutdown, |
2534 | .setsockopt = tipc_setsockopt, | |
2535 | .getsockopt = tipc_getsockopt, | |
2536 | .sendmsg = tipc_sendmsg, | |
2537 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2538 | .mmap = sock_no_mmap, |
2539 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2540 | }; |
2541 | ||
bca65eae | 2542 | static const struct proto_ops packet_ops = { |
0e65967e | 2543 | .owner = THIS_MODULE, |
b97bf3fd | 2544 | .family = AF_TIPC, |
247f0f3c YX |
2545 | .release = tipc_release, |
2546 | .bind = tipc_bind, | |
2547 | .connect = tipc_connect, | |
5eee6a6d | 2548 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2549 | .accept = tipc_accept, |
2550 | .getname = tipc_getname, | |
2551 | .poll = tipc_poll, | |
78acb1f9 | 2552 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2553 | .listen = tipc_listen, |
2554 | .shutdown = tipc_shutdown, | |
2555 | .setsockopt = tipc_setsockopt, | |
2556 | .getsockopt = tipc_getsockopt, | |
2557 | .sendmsg = tipc_send_packet, | |
2558 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2559 | .mmap = sock_no_mmap, |
2560 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2561 | }; |
2562 | ||
bca65eae | 2563 | static const struct proto_ops stream_ops = { |
0e65967e | 2564 | .owner = THIS_MODULE, |
b97bf3fd | 2565 | .family = AF_TIPC, |
247f0f3c YX |
2566 | .release = tipc_release, |
2567 | .bind = tipc_bind, | |
2568 | .connect = tipc_connect, | |
5eee6a6d | 2569 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2570 | .accept = tipc_accept, |
2571 | .getname = tipc_getname, | |
2572 | .poll = tipc_poll, | |
78acb1f9 | 2573 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2574 | .listen = tipc_listen, |
2575 | .shutdown = tipc_shutdown, | |
2576 | .setsockopt = tipc_setsockopt, | |
2577 | .getsockopt = tipc_getsockopt, | |
2578 | .sendmsg = tipc_send_stream, | |
2579 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2580 | .mmap = sock_no_mmap, |
2581 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2582 | }; |
2583 | ||
bca65eae | 2584 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2585 | .owner = THIS_MODULE, |
b97bf3fd | 2586 | .family = AF_TIPC, |
c5fa7b3c | 2587 | .create = tipc_sk_create |
b97bf3fd PL |
2588 | }; |
2589 | ||
2590 | static struct proto tipc_proto = { | |
2591 | .name = "TIPC", | |
2592 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2593 | .obj_size = sizeof(struct tipc_sock), |
2594 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2595 | }; |
2596 | ||
2597 | /** | |
4323add6 | 2598 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2599 | * |
b97bf3fd PL |
2600 | * Returns 0 on success, errno otherwise |
2601 | */ | |
4323add6 | 2602 | int tipc_socket_init(void) |
b97bf3fd PL |
2603 | { |
2604 | int res; | |
2605 | ||
c4307285 | 2606 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2607 | if (res) { |
2cf8aa19 | 2608 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2609 | goto out; |
2610 | } | |
2611 | ||
2612 | res = sock_register(&tipc_family_ops); | |
2613 | if (res) { | |
2cf8aa19 | 2614 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2615 | proto_unregister(&tipc_proto); |
2616 | goto out; | |
2617 | } | |
b97bf3fd PL |
2618 | out: |
2619 | return res; | |
2620 | } | |
2621 | ||
2622 | /** | |
4323add6 | 2623 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2624 | */ |
4323add6 | 2625 | void tipc_socket_stop(void) |
b97bf3fd | 2626 | { |
b97bf3fd PL |
2627 | sock_unregister(tipc_family_ops.family); |
2628 | proto_unregister(&tipc_proto); | |
2629 | } | |
34b78a12 RA |
2630 | |
2631 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2632 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2633 | { |
2634 | u32 peer_node; | |
2635 | u32 peer_port; | |
2636 | struct nlattr *nest; | |
2637 | ||
2638 | peer_node = tsk_peer_node(tsk); | |
2639 | peer_port = tsk_peer_port(tsk); | |
2640 | ||
2641 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2642 | ||
2643 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2644 | goto msg_full; | |
2645 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2646 | goto msg_full; | |
2647 | ||
2648 | if (tsk->conn_type != 0) { | |
2649 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2650 | goto msg_full; | |
2651 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2652 | goto msg_full; | |
2653 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2654 | goto msg_full; | |
2655 | } | |
2656 | nla_nest_end(skb, nest); | |
2657 | ||
2658 | return 0; | |
2659 | ||
2660 | msg_full: | |
2661 | nla_nest_cancel(skb, nest); | |
2662 | ||
2663 | return -EMSGSIZE; | |
2664 | } | |
2665 | ||
2666 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2667 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2668 | struct tipc_sock *tsk) | |
34b78a12 RA |
2669 | { |
2670 | int err; | |
2671 | void *hdr; | |
2672 | struct nlattr *attrs; | |
34747539 YX |
2673 | struct net *net = sock_net(skb->sk); |
2674 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2675 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2676 | |
2677 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2678 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2679 | if (!hdr) |
2680 | goto msg_cancel; | |
2681 | ||
2682 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2683 | if (!attrs) | |
2684 | goto genlmsg_cancel; | |
07f6c4bc | 2685 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2686 | goto attr_msg_cancel; |
34747539 | 2687 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2688 | goto attr_msg_cancel; |
2689 | ||
d6fb7e9c | 2690 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2691 | err = __tipc_nl_add_sk_con(skb, tsk); |
2692 | if (err) | |
2693 | goto attr_msg_cancel; | |
2694 | } else if (!list_empty(&tsk->publications)) { | |
2695 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2696 | goto attr_msg_cancel; | |
2697 | } | |
2698 | nla_nest_end(skb, attrs); | |
2699 | genlmsg_end(skb, hdr); | |
2700 | ||
2701 | return 0; | |
2702 | ||
2703 | attr_msg_cancel: | |
2704 | nla_nest_cancel(skb, attrs); | |
2705 | genlmsg_cancel: | |
2706 | genlmsg_cancel(skb, hdr); | |
2707 | msg_cancel: | |
2708 | return -EMSGSIZE; | |
2709 | } | |
2710 | ||
2711 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2712 | { | |
2713 | int err; | |
2714 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2715 | const struct bucket_table *tbl; |
2716 | struct rhash_head *pos; | |
e05b31f4 YX |
2717 | struct net *net = sock_net(skb->sk); |
2718 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2719 | u32 tbl_id = cb->args[0]; |
2720 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2721 | |
07f6c4bc | 2722 | rcu_read_lock(); |
e05b31f4 | 2723 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2724 | for (; tbl_id < tbl->size; tbl_id++) { |
2725 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2726 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2727 | if (prev_portid && prev_portid != tsk->portid) { |
2728 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2729 | continue; | |
2730 | } | |
2731 | ||
07f6c4bc | 2732 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2733 | if (err) { |
2734 | prev_portid = tsk->portid; | |
2735 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2736 | goto out; | |
2737 | } | |
2738 | prev_portid = 0; | |
07f6c4bc | 2739 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2740 | } |
34b78a12 | 2741 | } |
d6e164e3 | 2742 | out: |
07f6c4bc | 2743 | rcu_read_unlock(); |
d6e164e3 RA |
2744 | cb->args[0] = tbl_id; |
2745 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2746 | |
2747 | return skb->len; | |
2748 | } | |
1a1a143d RA |
2749 | |
2750 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2751 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2752 | struct netlink_callback *cb, | |
2753 | struct publication *publ) | |
1a1a143d RA |
2754 | { |
2755 | void *hdr; | |
2756 | struct nlattr *attrs; | |
2757 | ||
2758 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2759 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2760 | if (!hdr) |
2761 | goto msg_cancel; | |
2762 | ||
2763 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2764 | if (!attrs) | |
2765 | goto genlmsg_cancel; | |
2766 | ||
2767 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2768 | goto attr_msg_cancel; | |
2769 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2770 | goto attr_msg_cancel; | |
2771 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2772 | goto attr_msg_cancel; | |
2773 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2774 | goto attr_msg_cancel; | |
2775 | ||
2776 | nla_nest_end(skb, attrs); | |
2777 | genlmsg_end(skb, hdr); | |
2778 | ||
2779 | return 0; | |
2780 | ||
2781 | attr_msg_cancel: | |
2782 | nla_nest_cancel(skb, attrs); | |
2783 | genlmsg_cancel: | |
2784 | genlmsg_cancel(skb, hdr); | |
2785 | msg_cancel: | |
2786 | return -EMSGSIZE; | |
2787 | } | |
2788 | ||
2789 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2790 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2791 | struct netlink_callback *cb, | |
2792 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2793 | { |
2794 | int err; | |
2795 | struct publication *p; | |
2796 | ||
2797 | if (*last_publ) { | |
2798 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2799 | if (p->key == *last_publ) | |
2800 | break; | |
2801 | } | |
2802 | if (p->key != *last_publ) { | |
2803 | /* We never set seq or call nl_dump_check_consistent() | |
2804 | * this means that setting prev_seq here will cause the | |
2805 | * consistence check to fail in the netlink callback | |
2806 | * handler. Resulting in the last NLMSG_DONE message | |
2807 | * having the NLM_F_DUMP_INTR flag set. | |
2808 | */ | |
2809 | cb->prev_seq = 1; | |
2810 | *last_publ = 0; | |
2811 | return -EPIPE; | |
2812 | } | |
2813 | } else { | |
2814 | p = list_first_entry(&tsk->publications, struct publication, | |
2815 | pport_list); | |
2816 | } | |
2817 | ||
2818 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2819 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2820 | if (err) { | |
2821 | *last_publ = p->key; | |
2822 | return err; | |
2823 | } | |
2824 | } | |
2825 | *last_publ = 0; | |
2826 | ||
2827 | return 0; | |
2828 | } | |
2829 | ||
2830 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2831 | { | |
2832 | int err; | |
07f6c4bc | 2833 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2834 | u32 last_publ = cb->args[1]; |
2835 | u32 done = cb->args[2]; | |
e05b31f4 | 2836 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2837 | struct tipc_sock *tsk; |
2838 | ||
07f6c4bc | 2839 | if (!tsk_portid) { |
1a1a143d RA |
2840 | struct nlattr **attrs; |
2841 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2842 | ||
2843 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2844 | if (err) | |
2845 | return err; | |
2846 | ||
45e093ae RA |
2847 | if (!attrs[TIPC_NLA_SOCK]) |
2848 | return -EINVAL; | |
2849 | ||
1a1a143d RA |
2850 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2851 | attrs[TIPC_NLA_SOCK], | |
2852 | tipc_nl_sock_policy); | |
2853 | if (err) | |
2854 | return err; | |
2855 | ||
2856 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2857 | return -EINVAL; | |
2858 | ||
07f6c4bc | 2859 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2860 | } |
2861 | ||
2862 | if (done) | |
2863 | return 0; | |
2864 | ||
e05b31f4 | 2865 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2866 | if (!tsk) |
2867 | return -EINVAL; | |
2868 | ||
2869 | lock_sock(&tsk->sk); | |
2870 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2871 | if (!err) | |
2872 | done = 1; | |
2873 | release_sock(&tsk->sk); | |
07f6c4bc | 2874 | sock_put(&tsk->sk); |
1a1a143d | 2875 | |
07f6c4bc | 2876 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2877 | cb->args[1] = last_publ; |
2878 | cb->args[2] = done; | |
2879 | ||
2880 | return skb->len; | |
2881 | } |