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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2001-2007, 2012-2015, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc | 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 PL |
129 | static struct proto tipc_proto; |
130 | ||
6cca7289 HX |
131 | static const struct rhashtable_params tsk_rht_params; |
132 | ||
c4307285 | 133 | /* |
0c3141e9 AS |
134 | * Revised TIPC socket locking policy: |
135 | * | |
136 | * Most socket operations take the standard socket lock when they start | |
137 | * and hold it until they finish (or until they need to sleep). Acquiring | |
138 | * this lock grants the owner exclusive access to the fields of the socket | |
139 | * data structures, with the exception of the backlog queue. A few socket | |
140 | * operations can be done without taking the socket lock because they only | |
141 | * read socket information that never changes during the life of the socket. | |
142 | * | |
143 | * Socket operations may acquire the lock for the associated TIPC port if they | |
144 | * need to perform an operation on the port. If any routine needs to acquire | |
145 | * both the socket lock and the port lock it must take the socket lock first | |
146 | * to avoid the risk of deadlock. | |
147 | * | |
148 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
149 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
150 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
151 | * and either handles the message itself or adds it to the socket's backlog | |
152 | * queue; in the latter case the queued message is processed once the process | |
153 | * owning the socket lock releases it. | |
154 | * | |
155 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
156 | * the problem of a blocked socket operation preventing any other operations | |
157 | * from occurring. However, applications must be careful if they have | |
158 | * multiple threads trying to send (or receive) on the same socket, as these | |
159 | * operations might interfere with each other. For example, doing a connect | |
160 | * and a receive at the same time might allow the receive to consume the | |
161 | * ACK message meant for the connect. While additional work could be done | |
162 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
163 | * | |
164 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
165 | * that another operation that must be performed in a non-blocking manner is | |
166 | * not delayed for very long because the lock has already been taken. | |
167 | * | |
168 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
169 | * constant over its lifetime; such fields can be examined without taking | |
170 | * the socket lock and/or port lock, and do not need to be re-read even | |
171 | * after resuming processing after waiting. These fields include: | |
172 | * - socket type | |
173 | * - pointer to socket sk structure (aka tipc_sock structure) | |
174 | * - pointer to port structure | |
175 | * - port reference | |
176 | */ | |
177 | ||
c5898636 JPM |
178 | static u32 tsk_own_node(struct tipc_sock *tsk) |
179 | { | |
180 | return msg_prevnode(&tsk->phdr); | |
181 | } | |
182 | ||
301bae56 | 183 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 184 | { |
301bae56 | 185 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
186 | } |
187 | ||
301bae56 | 188 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 189 | { |
301bae56 | 190 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
191 | } |
192 | ||
301bae56 | 193 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 194 | { |
301bae56 | 195 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
196 | } |
197 | ||
301bae56 | 198 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 199 | { |
301bae56 | 200 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
201 | } |
202 | ||
301bae56 | 203 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 204 | { |
301bae56 | 205 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
206 | } |
207 | ||
301bae56 | 208 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 209 | { |
301bae56 | 210 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
211 | } |
212 | ||
301bae56 | 213 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 214 | { |
301bae56 | 215 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
216 | } |
217 | ||
301bae56 | 218 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
219 | { |
220 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
221 | return -EINVAL; | |
301bae56 | 222 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
223 | return 0; |
224 | } | |
8826cde6 | 225 | |
301bae56 JPM |
226 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
227 | { | |
228 | return container_of(sk, struct tipc_sock, sk); | |
229 | } | |
230 | ||
10724cc7 | 231 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 232 | { |
10724cc7 JPM |
233 | return tsk->snt_unacked >= tsk->snd_win; |
234 | } | |
235 | ||
236 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
237 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
238 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
239 | */ | |
240 | static u16 tsk_adv_blocks(int len) | |
241 | { | |
242 | return len / FLOWCTL_BLK_SZ / 4; | |
243 | } | |
244 | ||
245 | /* tsk_inc(): increment counter for sent or received data | |
246 | * - If block based flow control is not supported by peer we | |
247 | * fall back to message based ditto, incrementing the counter | |
248 | */ | |
249 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
250 | { | |
251 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
252 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
253 | return 1; | |
301bae56 JPM |
254 | } |
255 | ||
0c3141e9 | 256 | /** |
2e84c60b | 257 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
258 | * |
259 | * Caller must hold socket lock | |
b97bf3fd | 260 | */ |
2e84c60b | 261 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 262 | { |
5f6d9123 | 263 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
264 | } |
265 | ||
bcd3ffd4 JPM |
266 | /* tipc_sk_respond() : send response message back to sender |
267 | */ | |
268 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
269 | { | |
270 | u32 selector; | |
271 | u32 dnode; | |
272 | u32 onode = tipc_own_addr(sock_net(sk)); | |
273 | ||
274 | if (!tipc_msg_reverse(onode, &skb, err)) | |
275 | return; | |
276 | ||
277 | dnode = msg_destnode(buf_msg(skb)); | |
278 | selector = msg_origport(buf_msg(skb)); | |
279 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
280 | } | |
281 | ||
b97bf3fd | 282 | /** |
2e84c60b | 283 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
284 | * |
285 | * Caller must hold socket lock | |
b97bf3fd | 286 | */ |
2e84c60b | 287 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 288 | { |
a6ca1094 | 289 | struct sk_buff *skb; |
0c3141e9 | 290 | |
bcd3ffd4 JPM |
291 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
292 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
293 | } |
294 | ||
d6fb7e9c PB |
295 | static bool tipc_sk_connected(struct sock *sk) |
296 | { | |
297 | return sk->sk_socket->state == SS_CONNECTED; | |
298 | } | |
299 | ||
c752023a PB |
300 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
301 | * @sk: socket | |
302 | * | |
303 | * Returns true if connection less, false otherwise | |
304 | */ | |
305 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
306 | { | |
307 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
308 | } | |
309 | ||
2e84c60b | 310 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
311 | * |
312 | * Handles cases where the node's network address has changed from | |
313 | * the default of <0.0.0> to its configured setting. | |
314 | */ | |
2e84c60b | 315 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 316 | { |
d6fb7e9c PB |
317 | struct sock *sk = &tsk->sk; |
318 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 319 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
320 | u32 orig_node; |
321 | u32 peer_node; | |
322 | ||
d6fb7e9c | 323 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
324 | return false; |
325 | ||
326 | if (unlikely(msg_origport(msg) != peer_port)) | |
327 | return false; | |
328 | ||
329 | orig_node = msg_orignode(msg); | |
301bae56 | 330 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
331 | |
332 | if (likely(orig_node == peer_node)) | |
333 | return true; | |
334 | ||
34747539 | 335 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
336 | return true; |
337 | ||
34747539 | 338 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
339 | return true; |
340 | ||
341 | return false; | |
342 | } | |
343 | ||
0c288c86 PB |
344 | /* tipc_set_sk_state - set the sk_state of the socket |
345 | * @sk: socket | |
346 | * | |
347 | * Caller must hold socket lock | |
348 | * | |
349 | * Returns 0 on success, errno otherwise | |
350 | */ | |
351 | static int tipc_set_sk_state(struct sock *sk, int state) | |
352 | { | |
438adcaf | 353 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
354 | int res = -EINVAL; |
355 | ||
356 | switch (state) { | |
438adcaf PB |
357 | case TIPC_OPEN: |
358 | res = 0; | |
359 | break; | |
0c288c86 | 360 | case TIPC_LISTEN: |
99a20889 | 361 | case TIPC_CONNECTING: |
438adcaf | 362 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
363 | res = 0; |
364 | break; | |
8ea642ee | 365 | case TIPC_ESTABLISHED: |
99a20889 | 366 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 367 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
368 | res = 0; |
369 | break; | |
9fd4b070 | 370 | case TIPC_DISCONNECTING: |
99a20889 | 371 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
372 | oldsk_state == TIPC_ESTABLISHED) |
373 | res = 0; | |
374 | break; | |
0c288c86 PB |
375 | } |
376 | ||
377 | if (!res) | |
378 | sk->sk_state = state; | |
379 | ||
380 | return res; | |
381 | } | |
382 | ||
b97bf3fd | 383 | /** |
c5fa7b3c | 384 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 385 | * @net: network namespace (must be default network) |
b97bf3fd PL |
386 | * @sock: pre-allocated socket structure |
387 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 388 | * @kern: caused by kernel or by userspace? |
c4307285 | 389 | * |
0c3141e9 AS |
390 | * This routine creates additional data structures used by the TIPC socket, |
391 | * initializes them, and links them together. | |
b97bf3fd PL |
392 | * |
393 | * Returns 0 on success, errno otherwise | |
394 | */ | |
58ed9442 JPM |
395 | static int tipc_sk_create(struct net *net, struct socket *sock, |
396 | int protocol, int kern) | |
b97bf3fd | 397 | { |
c5898636 | 398 | struct tipc_net *tn; |
0c3141e9 | 399 | const struct proto_ops *ops; |
b97bf3fd | 400 | struct sock *sk; |
58ed9442 | 401 | struct tipc_sock *tsk; |
5b8fa7ce | 402 | struct tipc_msg *msg; |
0c3141e9 AS |
403 | |
404 | /* Validate arguments */ | |
b97bf3fd PL |
405 | if (unlikely(protocol != 0)) |
406 | return -EPROTONOSUPPORT; | |
407 | ||
b97bf3fd PL |
408 | switch (sock->type) { |
409 | case SOCK_STREAM: | |
0c3141e9 | 410 | ops = &stream_ops; |
b97bf3fd PL |
411 | break; |
412 | case SOCK_SEQPACKET: | |
0c3141e9 | 413 | ops = &packet_ops; |
b97bf3fd PL |
414 | break; |
415 | case SOCK_DGRAM: | |
b97bf3fd | 416 | case SOCK_RDM: |
0c3141e9 | 417 | ops = &msg_ops; |
b97bf3fd | 418 | break; |
49978651 | 419 | default: |
49978651 | 420 | return -EPROTOTYPE; |
b97bf3fd PL |
421 | } |
422 | ||
0c3141e9 | 423 | /* Allocate socket's protocol area */ |
11aa9c28 | 424 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 425 | if (sk == NULL) |
b97bf3fd | 426 | return -ENOMEM; |
b97bf3fd | 427 | |
58ed9442 | 428 | tsk = tipc_sk(sk); |
301bae56 | 429 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
430 | INIT_LIST_HEAD(&tsk->publications); |
431 | msg = &tsk->phdr; | |
c5898636 JPM |
432 | tn = net_generic(sock_net(sk), tipc_net_id); |
433 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 434 | NAMED_H_SIZE, 0); |
b97bf3fd | 435 | |
0c3141e9 | 436 | /* Finish initializing socket data structures */ |
0c3141e9 | 437 | sock->ops = ops; |
0c3141e9 | 438 | sock_init_data(sock, sk); |
438adcaf | 439 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 440 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 441 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
442 | return -EINVAL; |
443 | } | |
444 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 445 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
6f00089c | 446 | sk->sk_shutdown = 0; |
4f4482dc | 447 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 448 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
449 | sk->sk_data_ready = tipc_data_ready; |
450 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 451 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
452 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
453 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 454 | |
10724cc7 JPM |
455 | /* Start out with safe limits until we receive an advertised window */ |
456 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
457 | tsk->rcv_win = tsk->snd_win; | |
458 | ||
c752023a | 459 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 460 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 461 | if (sock->type == SOCK_DGRAM) |
301bae56 | 462 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 463 | } |
438adcaf | 464 | |
b97bf3fd PL |
465 | return 0; |
466 | } | |
467 | ||
07f6c4bc YX |
468 | static void tipc_sk_callback(struct rcu_head *head) |
469 | { | |
470 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
471 | ||
472 | sock_put(&tsk->sk); | |
473 | } | |
474 | ||
6f00089c PB |
475 | /* Caller should hold socket lock for the socket. */ |
476 | static void __tipc_shutdown(struct socket *sock, int error) | |
477 | { | |
478 | struct sock *sk = sock->sk; | |
479 | struct tipc_sock *tsk = tipc_sk(sk); | |
480 | struct net *net = sock_net(sk); | |
481 | u32 dnode = tsk_peer_node(tsk); | |
482 | struct sk_buff *skb; | |
483 | ||
484 | /* Reject all unreceived messages, except on an active connection | |
485 | * (which disconnects locally & sends a 'FIN+' to peer). | |
486 | */ | |
487 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
488 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
489 | kfree_skb(skb); | |
490 | } else { | |
491 | if (!tipc_sk_type_connectionless(sk) && | |
492 | sk->sk_state != TIPC_DISCONNECTING) { | |
493 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
494 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
495 | } | |
496 | tipc_sk_respond(sk, skb, error); | |
497 | } | |
498 | } | |
499 | if (sk->sk_state != TIPC_DISCONNECTING) { | |
500 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
501 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
502 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
503 | tsk->portid, error); | |
504 | if (skb) | |
505 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
506 | if (!tipc_sk_type_connectionless(sk)) { | |
507 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
508 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
b97bf3fd | 513 | /** |
247f0f3c | 514 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
515 | * @sock: socket to destroy |
516 | * | |
517 | * This routine cleans up any messages that are still queued on the socket. | |
518 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
519 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
520 | * and any others are discarded. (If the first message on a STREAM socket | |
521 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 522 | * |
b97bf3fd PL |
523 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
524 | * are returned or discarded according to the "destination droppable" setting | |
525 | * specified for the message by the sender. | |
526 | * | |
527 | * Returns 0 on success, errno otherwise | |
528 | */ | |
247f0f3c | 529 | static int tipc_release(struct socket *sock) |
b97bf3fd | 530 | { |
b97bf3fd | 531 | struct sock *sk = sock->sk; |
58ed9442 | 532 | struct tipc_sock *tsk; |
b97bf3fd | 533 | |
0c3141e9 AS |
534 | /* |
535 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
536 | * releases a pre-allocated child socket that was never used) | |
537 | */ | |
0c3141e9 | 538 | if (sk == NULL) |
b97bf3fd | 539 | return 0; |
c4307285 | 540 | |
58ed9442 | 541 | tsk = tipc_sk(sk); |
0c3141e9 AS |
542 | lock_sock(sk); |
543 | ||
6f00089c PB |
544 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
545 | sk->sk_shutdown = SHUTDOWN_MASK; | |
301bae56 | 546 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 547 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 548 | tipc_sk_remove(tsk); |
b97bf3fd | 549 | |
0c3141e9 | 550 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 551 | release_sock(sk); |
07f6c4bc YX |
552 | |
553 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 554 | sock->sk = NULL; |
b97bf3fd | 555 | |
065d7e39 | 556 | return 0; |
b97bf3fd PL |
557 | } |
558 | ||
559 | /** | |
247f0f3c | 560 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
561 | * @sock: socket structure |
562 | * @uaddr: socket address describing name(s) and desired operation | |
563 | * @uaddr_len: size of socket address data structure | |
c4307285 | 564 | * |
b97bf3fd PL |
565 | * Name and name sequence binding is indicated using a positive scope value; |
566 | * a negative scope value unbinds the specified name. Specifying no name | |
567 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 568 | * |
b97bf3fd | 569 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
570 | * |
571 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
572 | * access any non-constant socket information. | |
b97bf3fd | 573 | */ |
247f0f3c YX |
574 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
575 | int uaddr_len) | |
b97bf3fd | 576 | { |
84602761 | 577 | struct sock *sk = sock->sk; |
b97bf3fd | 578 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 579 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 580 | int res = -EINVAL; |
b97bf3fd | 581 | |
84602761 YX |
582 | lock_sock(sk); |
583 | if (unlikely(!uaddr_len)) { | |
301bae56 | 584 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
585 | goto exit; |
586 | } | |
c4307285 | 587 | |
84602761 YX |
588 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
589 | res = -EINVAL; | |
590 | goto exit; | |
591 | } | |
592 | if (addr->family != AF_TIPC) { | |
593 | res = -EAFNOSUPPORT; | |
594 | goto exit; | |
595 | } | |
b97bf3fd | 596 | |
b97bf3fd PL |
597 | if (addr->addrtype == TIPC_ADDR_NAME) |
598 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
599 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
600 | res = -EAFNOSUPPORT; | |
601 | goto exit; | |
602 | } | |
c4307285 | 603 | |
13a2e898 | 604 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 605 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
606 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
607 | res = -EACCES; | |
608 | goto exit; | |
609 | } | |
c422f1bd | 610 | |
84602761 | 611 | res = (addr->scope > 0) ? |
301bae56 JPM |
612 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
613 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
614 | exit: |
615 | release_sock(sk); | |
616 | return res; | |
b97bf3fd PL |
617 | } |
618 | ||
c4307285 | 619 | /** |
247f0f3c | 620 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
621 | * @sock: socket structure |
622 | * @uaddr: area for returned socket address | |
623 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 624 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 625 | * |
b97bf3fd | 626 | * Returns 0 on success, errno otherwise |
0c3141e9 | 627 | * |
2da59918 AS |
628 | * NOTE: This routine doesn't need to take the socket lock since it only |
629 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 630 | * a completely predictable manner). |
b97bf3fd | 631 | */ |
247f0f3c YX |
632 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
633 | int *uaddr_len, int peer) | |
b97bf3fd | 634 | { |
b97bf3fd | 635 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
636 | struct sock *sk = sock->sk; |
637 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 638 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 639 | |
88f8a5e3 | 640 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 641 | if (peer) { |
2da59918 | 642 | if ((sock->state != SS_CONNECTED) && |
9fd4b070 | 643 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 644 | return -ENOTCONN; |
301bae56 JPM |
645 | addr->addr.id.ref = tsk_peer_port(tsk); |
646 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 647 | } else { |
07f6c4bc | 648 | addr->addr.id.ref = tsk->portid; |
34747539 | 649 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 650 | } |
b97bf3fd PL |
651 | |
652 | *uaddr_len = sizeof(*addr); | |
653 | addr->addrtype = TIPC_ADDR_ID; | |
654 | addr->family = AF_TIPC; | |
655 | addr->scope = 0; | |
b97bf3fd PL |
656 | addr->addr.name.domain = 0; |
657 | ||
0c3141e9 | 658 | return 0; |
b97bf3fd PL |
659 | } |
660 | ||
661 | /** | |
247f0f3c | 662 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
663 | * @file: file structure associated with the socket |
664 | * @sock: socket for which to calculate the poll bits | |
665 | * @wait: ??? | |
666 | * | |
9b674e82 AS |
667 | * Returns pollmask value |
668 | * | |
669 | * COMMENTARY: | |
670 | * It appears that the usual socket locking mechanisms are not useful here | |
671 | * since the pollmask info is potentially out-of-date the moment this routine | |
672 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
673 | * to handle any preventable race conditions, so TIPC will do the same ... | |
674 | * | |
f662c070 AS |
675 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
676 | * imply that the operation will succeed, merely that it should be performed | |
677 | * and will not block. | |
b97bf3fd | 678 | */ |
247f0f3c YX |
679 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
680 | poll_table *wait) | |
b97bf3fd | 681 | { |
9b674e82 | 682 | struct sock *sk = sock->sk; |
58ed9442 | 683 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 684 | u32 mask = 0; |
9b674e82 | 685 | |
f288bef4 | 686 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 687 | |
6f00089c PB |
688 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
689 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
690 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
691 | mask |= POLLHUP; | |
692 | ||
99a20889 | 693 | if ((int)sock->state == SS_CONNECTED) { |
301bae56 | 694 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 | 695 | mask |= POLLOUT; |
f662c070 AS |
696 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
697 | mask |= (POLLIN | POLLRDNORM); | |
99a20889 | 698 | } else { |
438adcaf PB |
699 | switch (sk->sk_state) { |
700 | case TIPC_OPEN: | |
701 | if (!tsk->link_cong) | |
702 | mask |= POLLOUT; | |
703 | if (tipc_sk_type_connectionless(sk) && | |
704 | (!skb_queue_empty(&sk->sk_receive_queue))) | |
705 | mask |= (POLLIN | POLLRDNORM); | |
706 | break; | |
9fd4b070 PB |
707 | case TIPC_DISCONNECTING: |
708 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
709 | break; | |
438adcaf | 710 | case TIPC_LISTEN: |
99a20889 | 711 | case TIPC_CONNECTING: |
438adcaf PB |
712 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
713 | mask |= (POLLIN | POLLRDNORM); | |
714 | break; | |
715 | } | |
f662c070 | 716 | } |
9b674e82 AS |
717 | |
718 | return mask; | |
b97bf3fd PL |
719 | } |
720 | ||
0abd8ff2 JPM |
721 | /** |
722 | * tipc_sendmcast - send multicast message | |
723 | * @sock: socket structure | |
724 | * @seq: destination address | |
562640f3 | 725 | * @msg: message to send |
0abd8ff2 JPM |
726 | * @dsz: total length of message data |
727 | * @timeo: timeout to wait for wakeup | |
728 | * | |
729 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
730 | * Returns the number of bytes sent on success, or errno | |
731 | */ | |
732 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 733 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
734 | { |
735 | struct sock *sk = sock->sk; | |
c5898636 | 736 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 737 | struct net *net = sock_net(sk); |
c5898636 | 738 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 739 | struct sk_buff_head pktchain; |
f25dcc76 | 740 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
741 | uint mtu; |
742 | int rc; | |
743 | ||
7cf87fa2 PB |
744 | if (!timeo && tsk->link_cong) |
745 | return -ELINKCONG; | |
746 | ||
0abd8ff2 JPM |
747 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
748 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
749 | msg_set_destport(mhdr, 0); | |
750 | msg_set_destnode(mhdr, 0); | |
751 | msg_set_nametype(mhdr, seq->type); | |
752 | msg_set_namelower(mhdr, seq->lower); | |
753 | msg_set_nameupper(mhdr, seq->upper); | |
754 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
755 | ||
f214fc40 PB |
756 | skb_queue_head_init(&pktchain); |
757 | ||
0abd8ff2 | 758 | new_mtu: |
959e1781 | 759 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 760 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
761 | if (unlikely(rc < 0)) |
762 | return rc; | |
763 | ||
764 | do { | |
f214fc40 | 765 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
766 | if (likely(!rc)) |
767 | return dsz; | |
768 | ||
769 | if (rc == -ELINKCONG) { | |
770 | tsk->link_cong = 1; | |
771 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
772 | if (!rc) | |
773 | continue; | |
0abd8ff2 | 774 | } |
f214fc40 | 775 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
776 | if (rc == -EMSGSIZE) { |
777 | msg->msg_iter = save; | |
0abd8ff2 | 778 | goto new_mtu; |
f25dcc76 | 779 | } |
22d85c79 JPM |
780 | break; |
781 | } while (1); | |
0abd8ff2 JPM |
782 | return rc; |
783 | } | |
784 | ||
cb1b7280 JPM |
785 | /** |
786 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
787 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
788 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
789 | * | |
790 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 791 | */ |
cb1b7280 JPM |
792 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
793 | struct sk_buff_head *inputq) | |
078bec82 | 794 | { |
cb1b7280 | 795 | struct tipc_msg *msg; |
3c724acd | 796 | struct tipc_plist dports; |
3c724acd | 797 | u32 portid; |
078bec82 | 798 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
799 | struct sk_buff_head tmpq; |
800 | uint hsz; | |
801 | struct sk_buff *skb, *_skb; | |
3c724acd | 802 | |
cb1b7280 | 803 | __skb_queue_head_init(&tmpq); |
3c724acd | 804 | tipc_plist_init(&dports); |
078bec82 | 805 | |
cb1b7280 JPM |
806 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
807 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
808 | msg = buf_msg(skb); | |
809 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
810 | ||
811 | if (in_own_node(net, msg_orignode(msg))) | |
812 | scope = TIPC_NODE_SCOPE; | |
813 | ||
814 | /* Create destination port list and message clones: */ | |
815 | tipc_nametbl_mc_translate(net, | |
816 | msg_nametype(msg), msg_namelower(msg), | |
817 | msg_nameupper(msg), scope, &dports); | |
818 | portid = tipc_plist_pop(&dports); | |
819 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
820 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
821 | if (_skb) { | |
822 | msg_set_destport(buf_msg(_skb), portid); | |
823 | __skb_queue_tail(&tmpq, _skb); | |
824 | continue; | |
825 | } | |
826 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 827 | } |
cb1b7280 JPM |
828 | /* Append to inputq if not already done by other thread */ |
829 | spin_lock_bh(&inputq->lock); | |
830 | if (skb_peek(arrvq) == skb) { | |
831 | skb_queue_splice_tail_init(&tmpq, inputq); | |
832 | kfree_skb(__skb_dequeue(arrvq)); | |
833 | } | |
834 | spin_unlock_bh(&inputq->lock); | |
835 | __skb_queue_purge(&tmpq); | |
836 | kfree_skb(skb); | |
078bec82 | 837 | } |
cb1b7280 | 838 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
839 | } |
840 | ||
ac0074ee JPM |
841 | /** |
842 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
843 | * @tsk: receiving socket | |
bcd3ffd4 | 844 | * @skb: pointer to message buffer. |
ac0074ee | 845 | */ |
f1d048f2 JPM |
846 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
847 | struct sk_buff_head *xmitq) | |
ac0074ee | 848 | { |
bcd3ffd4 | 849 | struct sock *sk = &tsk->sk; |
f1d048f2 | 850 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
851 | struct tipc_msg *hdr = buf_msg(skb); |
852 | int mtyp = msg_type(hdr); | |
10724cc7 | 853 | bool conn_cong; |
bcd3ffd4 | 854 | |
ac0074ee | 855 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 856 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
857 | goto exit; |
858 | ||
8ea642ee | 859 | tsk->probe_unacked = false; |
ac0074ee | 860 | |
bcd3ffd4 JPM |
861 | if (mtyp == CONN_PROBE) { |
862 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
863 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
864 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
865 | return; |
866 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 867 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
868 | tsk->snt_unacked -= msg_conn_ack(hdr); |
869 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
870 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 871 | if (conn_cong) |
bcd3ffd4 JPM |
872 | sk->sk_write_space(sk); |
873 | } else if (mtyp != CONN_PROBE_REPLY) { | |
874 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 875 | } |
ac0074ee | 876 | exit: |
bcd3ffd4 | 877 | kfree_skb(skb); |
ac0074ee JPM |
878 | } |
879 | ||
3f40504f YX |
880 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
881 | { | |
882 | struct sock *sk = sock->sk; | |
58ed9442 | 883 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
884 | DEFINE_WAIT(wait); |
885 | int done; | |
886 | ||
887 | do { | |
888 | int err = sock_error(sk); | |
889 | if (err) | |
890 | return err; | |
6f00089c | 891 | if (sk->sk_shutdown & SEND_SHUTDOWN) |
3f40504f YX |
892 | return -EPIPE; |
893 | if (!*timeo_p) | |
894 | return -EAGAIN; | |
895 | if (signal_pending(current)) | |
896 | return sock_intr_errno(*timeo_p); | |
897 | ||
898 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 899 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
900 | finish_wait(sk_sleep(sk), &wait); |
901 | } while (!done); | |
902 | return 0; | |
903 | } | |
904 | ||
b97bf3fd | 905 | /** |
247f0f3c | 906 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
907 | * @sock: socket structure |
908 | * @m: message to send | |
e2dafe87 | 909 | * @dsz: amount of user data to be sent |
c4307285 | 910 | * |
b97bf3fd | 911 | * Message must have an destination specified explicitly. |
c4307285 | 912 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
913 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
914 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 915 | * |
b97bf3fd PL |
916 | * Returns the number of bytes sent on success, or errno otherwise |
917 | */ | |
1b784140 | 918 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 919 | struct msghdr *m, size_t dsz) |
39a0295f YX |
920 | { |
921 | struct sock *sk = sock->sk; | |
922 | int ret; | |
923 | ||
924 | lock_sock(sk); | |
925 | ret = __tipc_sendmsg(sock, m, dsz); | |
926 | release_sock(sk); | |
927 | ||
928 | return ret; | |
929 | } | |
930 | ||
931 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 932 | { |
e2dafe87 | 933 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 934 | struct sock *sk = sock->sk; |
58ed9442 | 935 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 936 | struct net *net = sock_net(sk); |
301bae56 | 937 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 938 | u32 dnode, dport; |
f214fc40 | 939 | struct sk_buff_head pktchain; |
c752023a | 940 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
a6ca1094 | 941 | struct sk_buff *skb; |
f2f8036e | 942 | struct tipc_name_seq *seq; |
f25dcc76 | 943 | struct iov_iter save; |
e2dafe87 | 944 | u32 mtu; |
3f40504f | 945 | long timeo; |
88b17b6a | 946 | int rc; |
b97bf3fd | 947 | |
e2dafe87 | 948 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 949 | return -EMSGSIZE; |
f2f8036e | 950 | if (unlikely(!dest)) { |
c752023a | 951 | if (is_connectionless && tsk->peer.family == AF_TIPC) |
aeda16b6 | 952 | dest = &tsk->peer; |
f2f8036e EH |
953 | else |
954 | return -EDESTADDRREQ; | |
955 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
956 | dest->family != AF_TIPC) { | |
957 | return -EINVAL; | |
958 | } | |
c752023a | 959 | if (!is_connectionless) { |
0c288c86 | 960 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 961 | return -EPIPE; |
438adcaf | 962 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
963 | return -EISCONN; |
964 | if (tsk->published) | |
965 | return -EOPNOTSUPP; | |
3388007b | 966 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
967 | tsk->conn_type = dest->addr.name.name.type; |
968 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 969 | } |
b97bf3fd | 970 | } |
f2f8036e | 971 | seq = &dest->addr.nameseq; |
3f40504f | 972 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
973 | |
974 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 975 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
976 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
977 | u32 type = dest->addr.name.name.type; | |
978 | u32 inst = dest->addr.name.name.instance; | |
979 | u32 domain = dest->addr.name.domain; | |
980 | ||
981 | dnode = domain; | |
982 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
983 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
984 | msg_set_nametype(mhdr, type); | |
985 | msg_set_nameinst(mhdr, inst); | |
986 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 987 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
988 | msg_set_destnode(mhdr, dnode); |
989 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
990 | if (unlikely(!dport && !dnode)) |
991 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
992 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
993 | dnode = dest->addr.id.node; | |
994 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
995 | msg_set_lookup_scope(mhdr, 0); | |
996 | msg_set_destnode(mhdr, dnode); | |
997 | msg_set_destport(mhdr, dest->addr.id.ref); | |
998 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
999 | } | |
1000 | ||
f214fc40 | 1001 | skb_queue_head_init(&pktchain); |
f25dcc76 | 1002 | save = m->msg_iter; |
e2dafe87 | 1003 | new_mtu: |
f2f9800d | 1004 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 1005 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 1006 | if (rc < 0) |
39a0295f | 1007 | return rc; |
e2dafe87 JPM |
1008 | |
1009 | do { | |
f214fc40 | 1010 | skb = skb_peek(&pktchain); |
a6ca1094 | 1011 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 1012 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 1013 | if (likely(!rc)) { |
c752023a | 1014 | if (!is_connectionless) |
99a20889 | 1015 | tipc_set_sk_state(sk, TIPC_CONNECTING); |
22d85c79 | 1016 | return dsz; |
c4307285 | 1017 | } |
22d85c79 JPM |
1018 | if (rc == -ELINKCONG) { |
1019 | tsk->link_cong = 1; | |
1020 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
1021 | if (!rc) | |
1022 | continue; | |
1023 | } | |
f214fc40 | 1024 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
1025 | if (rc == -EMSGSIZE) { |
1026 | m->msg_iter = save; | |
e2dafe87 | 1027 | goto new_mtu; |
f25dcc76 | 1028 | } |
22d85c79 JPM |
1029 | break; |
1030 | } while (1); | |
e2dafe87 JPM |
1031 | |
1032 | return rc; | |
b97bf3fd PL |
1033 | } |
1034 | ||
391a6dd1 YX |
1035 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
1036 | { | |
1037 | struct sock *sk = sock->sk; | |
58ed9442 | 1038 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
1039 | DEFINE_WAIT(wait); |
1040 | int done; | |
1041 | ||
1042 | do { | |
1043 | int err = sock_error(sk); | |
1044 | if (err) | |
1045 | return err; | |
9fd4b070 | 1046 | if (sk->sk_state == TIPC_DISCONNECTING) |
391a6dd1 YX |
1047 | return -EPIPE; |
1048 | else if (sock->state != SS_CONNECTED) | |
1049 | return -ENOTCONN; | |
1050 | if (!*timeo_p) | |
1051 | return -EAGAIN; | |
1052 | if (signal_pending(current)) | |
1053 | return sock_intr_errno(*timeo_p); | |
1054 | ||
1055 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1056 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 1057 | (!tsk->link_cong && |
301bae56 | 1058 | !tsk_conn_cong(tsk)) || |
d6fb7e9c | 1059 | !tipc_sk_connected(sk)); |
391a6dd1 YX |
1060 | finish_wait(sk_sleep(sk), &wait); |
1061 | } while (!done); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
c4307285 | 1065 | /** |
4ccfe5e0 | 1066 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 1067 | * @sock: socket structure |
4ccfe5e0 JPM |
1068 | * @m: data to send |
1069 | * @dsz: total length of data to be transmitted | |
c4307285 | 1070 | * |
4ccfe5e0 | 1071 | * Used for SOCK_STREAM data. |
c4307285 | 1072 | * |
4ccfe5e0 JPM |
1073 | * Returns the number of bytes sent on success (or partial success), |
1074 | * or errno if no data sent | |
b97bf3fd | 1075 | */ |
1b784140 | 1076 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1077 | { |
1078 | struct sock *sk = sock->sk; | |
1079 | int ret; | |
1080 | ||
1081 | lock_sock(sk); | |
1082 | ret = __tipc_send_stream(sock, m, dsz); | |
1083 | release_sock(sk); | |
1084 | ||
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1089 | { |
0c3141e9 | 1090 | struct sock *sk = sock->sk; |
f2f9800d | 1091 | struct net *net = sock_net(sk); |
58ed9442 | 1092 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1093 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1094 | struct sk_buff_head pktchain; |
342dfc30 | 1095 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1096 | u32 portid = tsk->portid; |
4ccfe5e0 | 1097 | int rc = -EINVAL; |
391a6dd1 | 1098 | long timeo; |
4ccfe5e0 JPM |
1099 | u32 dnode; |
1100 | uint mtu, send, sent = 0; | |
f25dcc76 | 1101 | struct iov_iter save; |
10724cc7 | 1102 | int hlen = MIN_H_SIZE; |
b97bf3fd PL |
1103 | |
1104 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1105 | if (unlikely(dest)) { |
39a0295f | 1106 | rc = __tipc_sendmsg(sock, m, dsz); |
10724cc7 | 1107 | hlen = msg_hdr_sz(mhdr); |
4ccfe5e0 | 1108 | if (dsz && (dsz == rc)) |
10724cc7 | 1109 | tsk->snt_unacked = tsk_inc(tsk, dsz + hlen); |
4ccfe5e0 JPM |
1110 | return rc; |
1111 | } | |
1112 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1113 | return -EMSGSIZE; |
1114 | ||
391a6dd1 | 1115 | if (unlikely(sock->state != SS_CONNECTED)) { |
9fd4b070 | 1116 | if (sk->sk_state == TIPC_DISCONNECTING) |
39a0295f | 1117 | return -EPIPE; |
391a6dd1 | 1118 | else |
39a0295f | 1119 | return -ENOTCONN; |
391a6dd1 | 1120 | } |
1d835874 | 1121 | |
391a6dd1 | 1122 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
7cf87fa2 PB |
1123 | if (!timeo && tsk->link_cong) |
1124 | return -ELINKCONG; | |
1125 | ||
301bae56 | 1126 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1127 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1128 | |
1129 | next: | |
f25dcc76 | 1130 | save = m->msg_iter; |
301bae56 | 1131 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1132 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1133 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1134 | if (unlikely(rc < 0)) |
39a0295f | 1135 | return rc; |
f214fc40 | 1136 | |
c4307285 | 1137 | do { |
301bae56 | 1138 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1139 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1140 | if (likely(!rc)) { |
10724cc7 | 1141 | tsk->snt_unacked += tsk_inc(tsk, send + hlen); |
4ccfe5e0 JPM |
1142 | sent += send; |
1143 | if (sent == dsz) | |
22d85c79 | 1144 | return dsz; |
4ccfe5e0 JPM |
1145 | goto next; |
1146 | } | |
1147 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1148 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1149 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1150 | portid); | |
f25dcc76 | 1151 | m->msg_iter = save; |
4ccfe5e0 JPM |
1152 | goto next; |
1153 | } | |
1154 | if (rc != -ELINKCONG) | |
1155 | break; | |
22d85c79 | 1156 | |
50100a5e | 1157 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1158 | } |
1159 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1160 | } while (!rc); | |
39a0295f | 1161 | |
f214fc40 | 1162 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1163 | return sent ? sent : rc; |
b97bf3fd PL |
1164 | } |
1165 | ||
c4307285 | 1166 | /** |
4ccfe5e0 | 1167 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1168 | * @sock: socket structure |
4ccfe5e0 JPM |
1169 | * @m: message to send |
1170 | * @dsz: length of data to be transmitted | |
c4307285 | 1171 | * |
4ccfe5e0 | 1172 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1173 | * |
4ccfe5e0 | 1174 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1175 | */ |
1b784140 | 1176 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1177 | { |
4ccfe5e0 JPM |
1178 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1179 | return -EMSGSIZE; | |
b97bf3fd | 1180 | |
1b784140 | 1181 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1182 | } |
1183 | ||
dadebc00 | 1184 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1185 | */ |
301bae56 | 1186 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1187 | u32 peer_node) |
b97bf3fd | 1188 | { |
3721e9c7 YX |
1189 | struct sock *sk = &tsk->sk; |
1190 | struct net *net = sock_net(sk); | |
301bae56 | 1191 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1192 | |
dadebc00 JPM |
1193 | msg_set_destnode(msg, peer_node); |
1194 | msg_set_destport(msg, peer_port); | |
1195 | msg_set_type(msg, TIPC_CONN_MSG); | |
1196 | msg_set_lookup_scope(msg, 0); | |
1197 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1198 | |
360aab6b | 1199 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
8ea642ee | 1200 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1201 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1202 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1203 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1204 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1205 | return; | |
1206 | ||
1207 | /* Fall back to message based flow control */ | |
1208 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1209 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1210 | } |
1211 | ||
1212 | /** | |
1213 | * set_orig_addr - capture sender's address for received message | |
1214 | * @m: descriptor for message info | |
1215 | * @msg: received message header | |
c4307285 | 1216 | * |
b97bf3fd PL |
1217 | * Note: Address is not captured if not requested by receiver. |
1218 | */ | |
05790c64 | 1219 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1220 | { |
342dfc30 | 1221 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1222 | |
c4307285 | 1223 | if (addr) { |
b97bf3fd PL |
1224 | addr->family = AF_TIPC; |
1225 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1226 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1227 | addr->addr.id.ref = msg_origport(msg); |
1228 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1229 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1230 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1231 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1232 | } | |
1233 | } | |
1234 | ||
1235 | /** | |
301bae56 | 1236 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1237 | * @m: descriptor for message info |
1238 | * @msg: received message header | |
301bae56 | 1239 | * @tsk: TIPC port associated with message |
c4307285 | 1240 | * |
b97bf3fd | 1241 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1242 | * |
b97bf3fd PL |
1243 | * Returns 0 if successful, otherwise errno |
1244 | */ | |
301bae56 JPM |
1245 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1246 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1247 | { |
1248 | u32 anc_data[3]; | |
1249 | u32 err; | |
1250 | u32 dest_type; | |
3546c750 | 1251 | int has_name; |
b97bf3fd PL |
1252 | int res; |
1253 | ||
1254 | if (likely(m->msg_controllen == 0)) | |
1255 | return 0; | |
1256 | ||
1257 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1258 | err = msg ? msg_errcode(msg) : 0; |
1259 | if (unlikely(err)) { | |
1260 | anc_data[0] = err; | |
1261 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1262 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1263 | if (res) | |
b97bf3fd | 1264 | return res; |
2db9983a AS |
1265 | if (anc_data[1]) { |
1266 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1267 | msg_data(msg)); | |
1268 | if (res) | |
1269 | return res; | |
1270 | } | |
b97bf3fd PL |
1271 | } |
1272 | ||
1273 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1274 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1275 | switch (dest_type) { | |
1276 | case TIPC_NAMED_MSG: | |
3546c750 | 1277 | has_name = 1; |
b97bf3fd PL |
1278 | anc_data[0] = msg_nametype(msg); |
1279 | anc_data[1] = msg_namelower(msg); | |
1280 | anc_data[2] = msg_namelower(msg); | |
1281 | break; | |
1282 | case TIPC_MCAST_MSG: | |
3546c750 | 1283 | has_name = 1; |
b97bf3fd PL |
1284 | anc_data[0] = msg_nametype(msg); |
1285 | anc_data[1] = msg_namelower(msg); | |
1286 | anc_data[2] = msg_nameupper(msg); | |
1287 | break; | |
1288 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1289 | has_name = (tsk->conn_type != 0); |
1290 | anc_data[0] = tsk->conn_type; | |
1291 | anc_data[1] = tsk->conn_instance; | |
1292 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1293 | break; |
1294 | default: | |
3546c750 | 1295 | has_name = 0; |
b97bf3fd | 1296 | } |
2db9983a AS |
1297 | if (has_name) { |
1298 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1299 | if (res) | |
1300 | return res; | |
1301 | } | |
b97bf3fd PL |
1302 | |
1303 | return 0; | |
1304 | } | |
1305 | ||
10724cc7 | 1306 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1307 | { |
d6fb7e9c PB |
1308 | struct sock *sk = &tsk->sk; |
1309 | struct net *net = sock_net(sk); | |
a6ca1094 | 1310 | struct sk_buff *skb = NULL; |
739f5e4e | 1311 | struct tipc_msg *msg; |
301bae56 JPM |
1312 | u32 peer_port = tsk_peer_port(tsk); |
1313 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1314 | |
d6fb7e9c | 1315 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1316 | return; |
c5898636 JPM |
1317 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1318 | dnode, tsk_own_node(tsk), peer_port, | |
1319 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1320 | if (!skb) |
739f5e4e | 1321 | return; |
a6ca1094 | 1322 | msg = buf_msg(skb); |
10724cc7 JPM |
1323 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1324 | tsk->rcv_unacked = 0; | |
1325 | ||
1326 | /* Adjust to and advertize the correct window limit */ | |
1327 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1328 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1329 | msg_set_adv_win(msg, tsk->rcv_win); | |
1330 | } | |
af9b028e | 1331 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1332 | } |
1333 | ||
85d3fc94 | 1334 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1335 | { |
1336 | struct sock *sk = sock->sk; | |
1337 | DEFINE_WAIT(wait); | |
85d3fc94 | 1338 | long timeo = *timeop; |
9bbb4ecc YX |
1339 | int err; |
1340 | ||
1341 | for (;;) { | |
1342 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1343 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1344 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1345 | err = -ENOTCONN; |
1346 | break; | |
1347 | } | |
1348 | release_sock(sk); | |
1349 | timeo = schedule_timeout(timeo); | |
1350 | lock_sock(sk); | |
1351 | } | |
1352 | err = 0; | |
1353 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1354 | break; | |
9bbb4ecc YX |
1355 | err = -EAGAIN; |
1356 | if (!timeo) | |
1357 | break; | |
143fe22f EH |
1358 | err = sock_intr_errno(timeo); |
1359 | if (signal_pending(current)) | |
1360 | break; | |
9bbb4ecc YX |
1361 | } |
1362 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1363 | *timeop = timeo; |
9bbb4ecc YX |
1364 | return err; |
1365 | } | |
1366 | ||
c4307285 | 1367 | /** |
247f0f3c | 1368 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1369 | * @m: descriptor for message info |
1370 | * @buf_len: total size of user buffer area | |
1371 | * @flags: receive flags | |
c4307285 | 1372 | * |
b97bf3fd PL |
1373 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1374 | * If the complete message doesn't fit in user area, truncate it. | |
1375 | * | |
1376 | * Returns size of returned message data, errno otherwise | |
1377 | */ | |
1b784140 YX |
1378 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1379 | int flags) | |
b97bf3fd | 1380 | { |
0c3141e9 | 1381 | struct sock *sk = sock->sk; |
58ed9442 | 1382 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1383 | struct sk_buff *buf; |
1384 | struct tipc_msg *msg; | |
c752023a | 1385 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
9bbb4ecc | 1386 | long timeo; |
b97bf3fd PL |
1387 | unsigned int sz; |
1388 | u32 err; | |
10724cc7 | 1389 | int res, hlen; |
b97bf3fd | 1390 | |
0c3141e9 | 1391 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1392 | if (unlikely(!buf_len)) |
1393 | return -EINVAL; | |
1394 | ||
0c3141e9 | 1395 | lock_sock(sk); |
b97bf3fd | 1396 | |
438adcaf | 1397 | if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1398 | res = -ENOTCONN; |
b97bf3fd PL |
1399 | goto exit; |
1400 | } | |
1401 | ||
9bbb4ecc | 1402 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1403 | restart: |
b97bf3fd | 1404 | |
0c3141e9 | 1405 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1406 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1407 | if (res) |
1408 | goto exit; | |
b97bf3fd | 1409 | |
0c3141e9 | 1410 | /* Look at first message in receive queue */ |
0c3141e9 | 1411 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1412 | msg = buf_msg(buf); |
1413 | sz = msg_data_sz(msg); | |
10724cc7 | 1414 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1415 | err = msg_errcode(msg); |
1416 | ||
b97bf3fd | 1417 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1418 | if ((!sz) && (!err)) { |
2e84c60b | 1419 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1420 | goto restart; |
1421 | } | |
1422 | ||
1423 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1424 | set_orig_addr(m, msg); |
1425 | ||
1426 | /* Capture ancillary data (optional) */ | |
301bae56 | 1427 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1428 | if (res) |
b97bf3fd PL |
1429 | goto exit; |
1430 | ||
1431 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1432 | if (!err) { |
1433 | if (unlikely(buf_len < sz)) { | |
1434 | sz = buf_len; | |
1435 | m->msg_flags |= MSG_TRUNC; | |
1436 | } | |
10724cc7 | 1437 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1438 | if (res) |
b97bf3fd | 1439 | goto exit; |
b97bf3fd PL |
1440 | res = sz; |
1441 | } else { | |
c752023a PB |
1442 | if (is_connectionless || err == TIPC_CONN_SHUTDOWN || |
1443 | m->msg_control) | |
b97bf3fd PL |
1444 | res = 0; |
1445 | else | |
1446 | res = -ECONNRESET; | |
1447 | } | |
1448 | ||
10724cc7 JPM |
1449 | if (unlikely(flags & MSG_PEEK)) |
1450 | goto exit; | |
1451 | ||
c752023a | 1452 | if (likely(!is_connectionless)) { |
10724cc7 JPM |
1453 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); |
1454 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1455 | tipc_sk_send_ack(tsk); | |
c4307285 | 1456 | } |
10724cc7 | 1457 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1458 | exit: |
0c3141e9 | 1459 | release_sock(sk); |
b97bf3fd PL |
1460 | return res; |
1461 | } | |
1462 | ||
c4307285 | 1463 | /** |
247f0f3c | 1464 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1465 | * @m: descriptor for message info |
1466 | * @buf_len: total size of user buffer area | |
1467 | * @flags: receive flags | |
c4307285 YH |
1468 | * |
1469 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1470 | * will optionally wait for more; never truncates data. |
1471 | * | |
1472 | * Returns size of returned message data, errno otherwise | |
1473 | */ | |
1b784140 YX |
1474 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1475 | size_t buf_len, int flags) | |
b97bf3fd | 1476 | { |
0c3141e9 | 1477 | struct sock *sk = sock->sk; |
58ed9442 | 1478 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1479 | struct sk_buff *buf; |
1480 | struct tipc_msg *msg; | |
9bbb4ecc | 1481 | long timeo; |
b97bf3fd | 1482 | unsigned int sz; |
ba8aebe9 | 1483 | int target; |
b97bf3fd | 1484 | int sz_copied = 0; |
b97bf3fd | 1485 | u32 err; |
10724cc7 | 1486 | int res = 0, hlen; |
b97bf3fd | 1487 | |
0c3141e9 | 1488 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1489 | if (unlikely(!buf_len)) |
1490 | return -EINVAL; | |
1491 | ||
0c3141e9 | 1492 | lock_sock(sk); |
b97bf3fd | 1493 | |
438adcaf | 1494 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1495 | res = -ENOTCONN; |
b97bf3fd PL |
1496 | goto exit; |
1497 | } | |
1498 | ||
3720d40b | 1499 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1500 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1501 | |
617d3c7a | 1502 | restart: |
0c3141e9 | 1503 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1504 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1505 | if (res) |
1506 | goto exit; | |
b97bf3fd | 1507 | |
0c3141e9 | 1508 | /* Look at first message in receive queue */ |
0c3141e9 | 1509 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1510 | msg = buf_msg(buf); |
1511 | sz = msg_data_sz(msg); | |
10724cc7 | 1512 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1513 | err = msg_errcode(msg); |
1514 | ||
1515 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1516 | if ((!sz) && (!err)) { |
2e84c60b | 1517 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1518 | goto restart; |
1519 | } | |
1520 | ||
1521 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1522 | if (sz_copied == 0) { |
1523 | set_orig_addr(m, msg); | |
301bae56 | 1524 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1525 | if (res) |
b97bf3fd PL |
1526 | goto exit; |
1527 | } | |
1528 | ||
1529 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1530 | if (!err) { |
ba8aebe9 PB |
1531 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1532 | u32 needed; | |
1533 | int sz_to_copy; | |
b97bf3fd | 1534 | |
0232fd0a | 1535 | sz -= offset; |
b97bf3fd | 1536 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1537 | sz_to_copy = min(sz, needed); |
0232fd0a | 1538 | |
10724cc7 | 1539 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1540 | if (res) |
b97bf3fd | 1541 | goto exit; |
0232fd0a | 1542 | |
b97bf3fd PL |
1543 | sz_copied += sz_to_copy; |
1544 | ||
1545 | if (sz_to_copy < sz) { | |
1546 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1547 | TIPC_SKB_CB(buf)->bytes_read = |
1548 | offset + sz_to_copy; | |
b97bf3fd PL |
1549 | goto exit; |
1550 | } | |
b97bf3fd PL |
1551 | } else { |
1552 | if (sz_copied != 0) | |
1553 | goto exit; /* can't add error msg to valid data */ | |
1554 | ||
1555 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1556 | res = 0; | |
1557 | else | |
1558 | res = -ECONNRESET; | |
1559 | } | |
1560 | ||
10724cc7 JPM |
1561 | if (unlikely(flags & MSG_PEEK)) |
1562 | goto exit; | |
1563 | ||
1564 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1565 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1566 | tipc_sk_send_ack(tsk); | |
1567 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1568 | |
1569 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1570 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1571 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1572 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1573 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1574 | goto restart; |
1575 | ||
1576 | exit: | |
0c3141e9 | 1577 | release_sock(sk); |
a3b0a5a9 | 1578 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1579 | } |
1580 | ||
f288bef4 YX |
1581 | /** |
1582 | * tipc_write_space - wake up thread if port congestion is released | |
1583 | * @sk: socket | |
1584 | */ | |
1585 | static void tipc_write_space(struct sock *sk) | |
1586 | { | |
1587 | struct socket_wq *wq; | |
1588 | ||
1589 | rcu_read_lock(); | |
1590 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1591 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1592 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1593 | POLLWRNORM | POLLWRBAND); | |
1594 | rcu_read_unlock(); | |
1595 | } | |
1596 | ||
1597 | /** | |
1598 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1599 | * @sk: socket | |
1600 | * @len: the length of messages | |
1601 | */ | |
676d2369 | 1602 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1603 | { |
1604 | struct socket_wq *wq; | |
1605 | ||
1606 | rcu_read_lock(); | |
1607 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1608 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1609 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1610 | POLLRDNORM | POLLRDBAND); | |
1611 | rcu_read_unlock(); | |
1612 | } | |
1613 | ||
f4195d1e YX |
1614 | static void tipc_sock_destruct(struct sock *sk) |
1615 | { | |
1616 | __skb_queue_purge(&sk->sk_receive_queue); | |
1617 | } | |
1618 | ||
7e6c131e YX |
1619 | /** |
1620 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1621 | * @tsk: TIPC socket |
1186adf7 | 1622 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1623 | * |
cda3696d | 1624 | * Returns true if everything ok, false otherwise |
7e6c131e | 1625 | */ |
cda3696d | 1626 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1627 | { |
58ed9442 | 1628 | struct sock *sk = &tsk->sk; |
f2f9800d | 1629 | struct net *net = sock_net(sk); |
8826cde6 | 1630 | struct socket *sock = sk->sk_socket; |
cda3696d | 1631 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1632 | |
cda3696d JPM |
1633 | if (unlikely(msg_mcast(hdr))) |
1634 | return false; | |
7e6c131e YX |
1635 | |
1636 | switch ((int)sock->state) { | |
1637 | case SS_CONNECTED: | |
cda3696d | 1638 | |
7e6c131e | 1639 | /* Accept only connection-based messages sent by peer */ |
cda3696d JPM |
1640 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
1641 | return false; | |
1642 | ||
1643 | if (unlikely(msg_errcode(hdr))) { | |
9fd4b070 | 1644 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
cda3696d JPM |
1645 | /* Let timer expire on it's own */ |
1646 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1647 | tsk->portid); | |
4891d8fe | 1648 | sk->sk_state_change(sk); |
7e6c131e | 1649 | } |
cda3696d | 1650 | return true; |
99a20889 | 1651 | } |
cda3696d | 1652 | |
99a20889 PB |
1653 | switch (sk->sk_state) { |
1654 | case TIPC_CONNECTING: | |
cda3696d JPM |
1655 | /* Accept only ACK or NACK message */ |
1656 | if (unlikely(!msg_connected(hdr))) | |
1657 | return false; | |
dadebc00 | 1658 | |
cda3696d | 1659 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1660 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1661 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1662 | return true; |
584d24b3 YX |
1663 | } |
1664 | ||
cda3696d | 1665 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1666 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1667 | sk->sk_err = EINVAL; |
cda3696d | 1668 | return true; |
584d24b3 YX |
1669 | } |
1670 | ||
cda3696d JPM |
1671 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1672 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 JPM |
1673 | sock->state = SS_CONNECTED; |
1674 | ||
cda3696d JPM |
1675 | /* If 'ACK+' message, add to socket receive queue */ |
1676 | if (msg_data_sz(hdr)) | |
1677 | return true; | |
1678 | ||
1679 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1680 | if (waitqueue_active(sk_sleep(sk))) | |
1681 | wake_up_interruptible(sk_sleep(sk)); | |
1682 | ||
1683 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1684 | msg_set_dest_droppable(hdr, 1); | |
1685 | return false; | |
cda3696d | 1686 | |
438adcaf | 1687 | case TIPC_OPEN: |
9fd4b070 | 1688 | case TIPC_DISCONNECTING: |
438adcaf PB |
1689 | break; |
1690 | case TIPC_LISTEN: | |
7e6c131e | 1691 | /* Accept only SYN message */ |
cda3696d JPM |
1692 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1693 | return true; | |
7e6c131e | 1694 | break; |
7e6c131e | 1695 | default: |
438adcaf | 1696 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 1697 | } |
438adcaf | 1698 | |
cda3696d | 1699 | return false; |
7e6c131e YX |
1700 | } |
1701 | ||
aba79f33 YX |
1702 | /** |
1703 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1704 | * @sk: socket | |
10724cc7 | 1705 | * @skb: message |
aba79f33 | 1706 | * |
10724cc7 JPM |
1707 | * For connection oriented messages, irrespective of importance, |
1708 | * default queue limit is 2 MB. | |
aba79f33 | 1709 | * |
10724cc7 JPM |
1710 | * For connectionless messages, queue limits are based on message |
1711 | * importance as follows: | |
aba79f33 | 1712 | * |
10724cc7 JPM |
1713 | * TIPC_LOW_IMPORTANCE (2 MB) |
1714 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1715 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1716 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1717 | * |
1718 | * Returns overload limit according to corresponding message importance | |
1719 | */ | |
10724cc7 | 1720 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1721 | { |
10724cc7 JPM |
1722 | struct tipc_sock *tsk = tipc_sk(sk); |
1723 | struct tipc_msg *hdr = buf_msg(skb); | |
1724 | ||
1725 | if (unlikely(!msg_connected(hdr))) | |
1726 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1727 | |
10724cc7 JPM |
1728 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1729 | return sk->sk_rcvbuf; | |
0cee6bbe | 1730 | |
10724cc7 | 1731 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1732 | } |
1733 | ||
c4307285 | 1734 | /** |
0c3141e9 AS |
1735 | * filter_rcv - validate incoming message |
1736 | * @sk: socket | |
cda3696d | 1737 | * @skb: pointer to message. |
c4307285 | 1738 | * |
0c3141e9 AS |
1739 | * Enqueues message on receive queue if acceptable; optionally handles |
1740 | * disconnect indication for a connected socket. | |
1741 | * | |
1186adf7 | 1742 | * Called with socket lock already taken |
c4307285 | 1743 | * |
cda3696d | 1744 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1745 | */ |
f1d048f2 JPM |
1746 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1747 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1748 | { |
58ed9442 | 1749 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1750 | struct tipc_msg *hdr = buf_msg(skb); |
1751 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1752 | int err = TIPC_OK; | |
1753 | int usr = msg_user(hdr); | |
b97bf3fd | 1754 | |
cda3696d | 1755 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1756 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1757 | return false; |
1186adf7 | 1758 | } |
ec8a2e56 | 1759 | |
cda3696d JPM |
1760 | if (unlikely(usr == SOCK_WAKEUP)) { |
1761 | kfree_skb(skb); | |
50100a5e JPM |
1762 | tsk->link_cong = 0; |
1763 | sk->sk_write_space(sk); | |
cda3696d | 1764 | return false; |
50100a5e JPM |
1765 | } |
1766 | ||
cda3696d JPM |
1767 | /* Drop if illegal message type */ |
1768 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1769 | kfree_skb(skb); | |
1770 | return false; | |
1771 | } | |
0c3141e9 | 1772 | |
cda3696d | 1773 | /* Reject if wrong message type for current socket state */ |
c752023a | 1774 | if (tipc_sk_type_connectionless(sk)) { |
cda3696d JPM |
1775 | if (msg_connected(hdr)) { |
1776 | err = TIPC_ERR_NO_PORT; | |
1777 | goto reject; | |
1778 | } | |
1779 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1780 | err = TIPC_ERR_NO_PORT; | |
1781 | goto reject; | |
b97bf3fd PL |
1782 | } |
1783 | ||
1784 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1785 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1786 | err = TIPC_ERR_OVERLOAD; | |
1787 | goto reject; | |
1788 | } | |
b97bf3fd | 1789 | |
aba79f33 | 1790 | /* Enqueue message */ |
ba8aebe9 | 1791 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1792 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1793 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1794 | |
676d2369 | 1795 | sk->sk_data_ready(sk); |
cda3696d JPM |
1796 | return true; |
1797 | ||
1798 | reject: | |
f1d048f2 JPM |
1799 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1800 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1801 | return false; |
0c3141e9 | 1802 | } |
b97bf3fd | 1803 | |
0c3141e9 | 1804 | /** |
4f4482dc | 1805 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1806 | * @sk: socket |
a6ca1094 | 1807 | * @skb: message |
0c3141e9 | 1808 | * |
e3a77561 | 1809 | * Caller must hold socket lock |
0c3141e9 AS |
1810 | * |
1811 | * Returns 0 | |
1812 | */ | |
a6ca1094 | 1813 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1814 | { |
cda3696d | 1815 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1816 | struct sk_buff_head xmitq; |
1817 | u32 dnode, selector; | |
0c3141e9 | 1818 | |
f1d048f2 JPM |
1819 | __skb_queue_head_init(&xmitq); |
1820 | ||
1821 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1822 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1823 | return 0; |
1824 | } | |
1825 | ||
1826 | if (skb_queue_empty(&xmitq)) | |
1827 | return 0; | |
1828 | ||
1829 | /* Send response/rejected message */ | |
1830 | skb = __skb_dequeue(&xmitq); | |
1831 | dnode = msg_destnode(buf_msg(skb)); | |
1832 | selector = msg_origport(buf_msg(skb)); | |
1833 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1834 | return 0; |
1835 | } | |
1836 | ||
d570d864 | 1837 | /** |
c637c103 JPM |
1838 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1839 | * inputq and try adding them to socket or backlog queue | |
1840 | * @inputq: list of incoming buffers with potentially different destinations | |
1841 | * @sk: socket where the buffers should be enqueued | |
1842 | * @dport: port number for the socket | |
d570d864 JPM |
1843 | * |
1844 | * Caller must hold socket lock | |
d570d864 | 1845 | */ |
cda3696d | 1846 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1847 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1848 | { |
f1d048f2 JPM |
1849 | unsigned long time_limit = jiffies + 2; |
1850 | struct sk_buff *skb; | |
d570d864 JPM |
1851 | unsigned int lim; |
1852 | atomic_t *dcnt; | |
f1d048f2 | 1853 | u32 onode; |
c637c103 JPM |
1854 | |
1855 | while (skb_queue_len(inputq)) { | |
51a00daf | 1856 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1857 | return; |
1858 | ||
c637c103 JPM |
1859 | skb = tipc_skb_dequeue(inputq, dport); |
1860 | if (unlikely(!skb)) | |
cda3696d JPM |
1861 | return; |
1862 | ||
1863 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1864 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1865 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1866 | continue; |
c637c103 | 1867 | } |
cda3696d JPM |
1868 | |
1869 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1870 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1871 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1872 | atomic_set(dcnt, 0); |
1873 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1874 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1875 | continue; | |
cda3696d JPM |
1876 | |
1877 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1878 | onode = tipc_own_addr(sock_net(sk)); |
1879 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1880 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1881 | break; |
c637c103 | 1882 | } |
d570d864 JPM |
1883 | } |
1884 | ||
0c3141e9 | 1885 | /** |
c637c103 JPM |
1886 | * tipc_sk_rcv - handle a chain of incoming buffers |
1887 | * @inputq: buffer list containing the buffers | |
1888 | * Consumes all buffers in list until inputq is empty | |
1889 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1890 | */ |
cda3696d | 1891 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1892 | { |
f1d048f2 | 1893 | struct sk_buff_head xmitq; |
c637c103 | 1894 | u32 dnode, dport = 0; |
9871b27f | 1895 | int err; |
9816f061 | 1896 | struct tipc_sock *tsk; |
9816f061 | 1897 | struct sock *sk; |
cda3696d | 1898 | struct sk_buff *skb; |
9816f061 | 1899 | |
f1d048f2 | 1900 | __skb_queue_head_init(&xmitq); |
c637c103 | 1901 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1902 | dport = tipc_skb_peek_port(inputq, dport); |
1903 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1904 | |
c637c103 JPM |
1905 | if (likely(tsk)) { |
1906 | sk = &tsk->sk; | |
1907 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1908 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1909 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1910 | } |
f1d048f2 JPM |
1911 | /* Send pending response/rejected messages, if any */ |
1912 | while ((skb = __skb_dequeue(&xmitq))) { | |
1913 | dnode = msg_destnode(buf_msg(skb)); | |
1914 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1915 | } | |
c637c103 | 1916 | sock_put(sk); |
c637c103 | 1917 | continue; |
c637c103 | 1918 | } |
cda3696d JPM |
1919 | |
1920 | /* No destination socket => dequeue skb if still there */ | |
1921 | skb = tipc_skb_dequeue(inputq, dport); | |
1922 | if (!skb) | |
1923 | return; | |
1924 | ||
1925 | /* Try secondary lookup if unresolved named message */ | |
1926 | err = TIPC_ERR_NO_PORT; | |
1927 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1928 | goto xmit; | |
1929 | ||
1930 | /* Prepare for message rejection */ | |
1931 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1932 | continue; |
e3a77561 | 1933 | xmit: |
cda3696d | 1934 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1935 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1936 | } |
b97bf3fd PL |
1937 | } |
1938 | ||
78eb3a53 YX |
1939 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1940 | { | |
1941 | struct sock *sk = sock->sk; | |
1942 | DEFINE_WAIT(wait); | |
1943 | int done; | |
1944 | ||
1945 | do { | |
1946 | int err = sock_error(sk); | |
1947 | if (err) | |
1948 | return err; | |
1949 | if (!*timeo_p) | |
1950 | return -ETIMEDOUT; | |
1951 | if (signal_pending(current)) | |
1952 | return sock_intr_errno(*timeo_p); | |
1953 | ||
1954 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
99a20889 PB |
1955 | done = sk_wait_event(sk, timeo_p, |
1956 | sk->sk_state != TIPC_CONNECTING); | |
78eb3a53 YX |
1957 | finish_wait(sk_sleep(sk), &wait); |
1958 | } while (!done); | |
1959 | return 0; | |
1960 | } | |
1961 | ||
b97bf3fd | 1962 | /** |
247f0f3c | 1963 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1964 | * @sock: socket structure |
1965 | * @dest: socket address for destination port | |
1966 | * @destlen: size of socket address data structure | |
0c3141e9 | 1967 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1968 | * |
1969 | * Returns 0 on success, errno otherwise | |
1970 | */ | |
247f0f3c YX |
1971 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1972 | int destlen, int flags) | |
b97bf3fd | 1973 | { |
0c3141e9 | 1974 | struct sock *sk = sock->sk; |
f2f8036e | 1975 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1976 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1977 | struct msghdr m = {NULL,}; | |
f2f8036e | 1978 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 1979 | int previous; |
f2f8036e | 1980 | int res = 0; |
b89741a0 | 1981 | |
0c3141e9 AS |
1982 | lock_sock(sk); |
1983 | ||
f2f8036e | 1984 | /* DGRAM/RDM connect(), just save the destaddr */ |
c752023a | 1985 | if (tipc_sk_type_connectionless(sk)) { |
f2f8036e | 1986 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1987 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1988 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1989 | res = -EINVAL; | |
f2f8036e | 1990 | } else { |
aeda16b6 | 1991 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1992 | } |
0c3141e9 AS |
1993 | goto exit; |
1994 | } | |
b89741a0 | 1995 | |
b89741a0 AS |
1996 | /* |
1997 | * Reject connection attempt using multicast address | |
1998 | * | |
1999 | * Note: send_msg() validates the rest of the address fields, | |
2000 | * so there's no need to do it here | |
2001 | */ | |
0c3141e9 AS |
2002 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
2003 | res = -EINVAL; | |
2004 | goto exit; | |
2005 | } | |
2006 | ||
99a20889 | 2007 | previous = sk->sk_state; |
438adcaf PB |
2008 | |
2009 | switch (sk->sk_state) { | |
2010 | case TIPC_OPEN: | |
584d24b3 YX |
2011 | /* Send a 'SYN-' to destination */ |
2012 | m.msg_name = dest; | |
2013 | m.msg_namelen = destlen; | |
2014 | ||
2015 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2016 | * indicate send_msg() is never blocked. | |
2017 | */ | |
2018 | if (!timeout) | |
2019 | m.msg_flags = MSG_DONTWAIT; | |
2020 | ||
39a0295f | 2021 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2022 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2023 | goto exit; | |
2024 | ||
99a20889 | 2025 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2026 | * difference is that return value in non-blocking |
2027 | * case is EINPROGRESS, rather than EALREADY. | |
2028 | */ | |
2029 | res = -EINPROGRESS; | |
99a20889 PB |
2030 | /* fall thru' */ |
2031 | case TIPC_CONNECTING: | |
2032 | if (!timeout) { | |
2033 | if (previous == TIPC_CONNECTING) | |
2034 | res = -EALREADY; | |
78eb3a53 | 2035 | goto exit; |
99a20889 | 2036 | } |
78eb3a53 YX |
2037 | timeout = msecs_to_jiffies(timeout); |
2038 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2039 | res = tipc_wait_for_connect(sock, &timeout); | |
99a20889 PB |
2040 | goto exit; |
2041 | } | |
2042 | ||
2043 | if (sock->state == SS_CONNECTED) | |
584d24b3 | 2044 | res = -EISCONN; |
99a20889 | 2045 | else |
584d24b3 | 2046 | res = -EINVAL; |
99a20889 | 2047 | |
0c3141e9 AS |
2048 | exit: |
2049 | release_sock(sk); | |
b89741a0 | 2050 | return res; |
b97bf3fd PL |
2051 | } |
2052 | ||
c4307285 | 2053 | /** |
247f0f3c | 2054 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2055 | * @sock: socket structure |
2056 | * @len: (unused) | |
c4307285 | 2057 | * |
b97bf3fd PL |
2058 | * Returns 0 on success, errno otherwise |
2059 | */ | |
247f0f3c | 2060 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2061 | { |
0c3141e9 AS |
2062 | struct sock *sk = sock->sk; |
2063 | int res; | |
2064 | ||
2065 | lock_sock(sk); | |
0c288c86 | 2066 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2067 | release_sock(sk); |
0c288c86 | 2068 | |
0c3141e9 | 2069 | return res; |
b97bf3fd PL |
2070 | } |
2071 | ||
6398e23c YX |
2072 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2073 | { | |
2074 | struct sock *sk = sock->sk; | |
2075 | DEFINE_WAIT(wait); | |
2076 | int err; | |
2077 | ||
2078 | /* True wake-one mechanism for incoming connections: only | |
2079 | * one process gets woken up, not the 'whole herd'. | |
2080 | * Since we do not 'race & poll' for established sockets | |
2081 | * anymore, the common case will execute the loop only once. | |
2082 | */ | |
2083 | for (;;) { | |
2084 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2085 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2086 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2087 | release_sock(sk); |
2088 | timeo = schedule_timeout(timeo); | |
2089 | lock_sock(sk); | |
2090 | } | |
2091 | err = 0; | |
2092 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2093 | break; | |
6398e23c YX |
2094 | err = -EAGAIN; |
2095 | if (!timeo) | |
2096 | break; | |
143fe22f EH |
2097 | err = sock_intr_errno(timeo); |
2098 | if (signal_pending(current)) | |
2099 | break; | |
6398e23c YX |
2100 | } |
2101 | finish_wait(sk_sleep(sk), &wait); | |
2102 | return err; | |
2103 | } | |
2104 | ||
c4307285 | 2105 | /** |
247f0f3c | 2106 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2107 | * @sock: listening socket |
2108 | * @newsock: new socket that is to be connected | |
2109 | * @flags: file-related flags associated with socket | |
c4307285 | 2110 | * |
b97bf3fd PL |
2111 | * Returns 0 on success, errno otherwise |
2112 | */ | |
247f0f3c | 2113 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2114 | { |
0fef8f20 | 2115 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2116 | struct sk_buff *buf; |
301bae56 | 2117 | struct tipc_sock *new_tsock; |
0fef8f20 | 2118 | struct tipc_msg *msg; |
6398e23c | 2119 | long timeo; |
0c3141e9 | 2120 | int res; |
b97bf3fd | 2121 | |
0c3141e9 | 2122 | lock_sock(sk); |
b97bf3fd | 2123 | |
0c288c86 | 2124 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2125 | res = -EINVAL; |
b97bf3fd PL |
2126 | goto exit; |
2127 | } | |
6398e23c YX |
2128 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2129 | res = tipc_wait_for_accept(sock, timeo); | |
2130 | if (res) | |
2131 | goto exit; | |
0c3141e9 AS |
2132 | |
2133 | buf = skb_peek(&sk->sk_receive_queue); | |
2134 | ||
cb5da847 | 2135 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2136 | if (res) |
2137 | goto exit; | |
fdd75ea8 | 2138 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2139 | |
0fef8f20 | 2140 | new_sk = new_sock->sk; |
301bae56 | 2141 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2142 | msg = buf_msg(buf); |
b97bf3fd | 2143 | |
0fef8f20 PG |
2144 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2145 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2146 | ||
2147 | /* | |
2148 | * Reject any stray messages received by new socket | |
2149 | * before the socket lock was taken (very, very unlikely) | |
2150 | */ | |
2e84c60b | 2151 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2152 | |
2153 | /* Connect new socket to it's peer */ | |
301bae56 | 2154 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2155 | new_sock->state = SS_CONNECTED; |
2156 | ||
301bae56 | 2157 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2158 | if (msg_named(msg)) { |
301bae56 JPM |
2159 | new_tsock->conn_type = msg_nametype(msg); |
2160 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2161 | } |
0fef8f20 PG |
2162 | |
2163 | /* | |
2164 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2165 | * Respond to 'SYN+' by queuing it on new socket. | |
2166 | */ | |
2167 | if (!msg_data_sz(msg)) { | |
2168 | struct msghdr m = {NULL,}; | |
2169 | ||
2e84c60b | 2170 | tsk_advance_rx_queue(sk); |
39a0295f | 2171 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2172 | } else { |
2173 | __skb_dequeue(&sk->sk_receive_queue); | |
2174 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2175 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2176 | } |
2177 | release_sock(new_sk); | |
b97bf3fd | 2178 | exit: |
0c3141e9 | 2179 | release_sock(sk); |
b97bf3fd PL |
2180 | return res; |
2181 | } | |
2182 | ||
2183 | /** | |
247f0f3c | 2184 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2185 | * @sock: socket structure |
e247a8f5 | 2186 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2187 | * |
2188 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2189 | * |
b97bf3fd PL |
2190 | * Returns 0 on success, errno otherwise |
2191 | */ | |
247f0f3c | 2192 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2193 | { |
0c3141e9 | 2194 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2195 | int res; |
2196 | ||
e247a8f5 AS |
2197 | if (how != SHUT_RDWR) |
2198 | return -EINVAL; | |
b97bf3fd | 2199 | |
0c3141e9 | 2200 | lock_sock(sk); |
b97bf3fd | 2201 | |
6f00089c PB |
2202 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2203 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2204 | |
6f00089c | 2205 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2206 | /* Discard any unreceived messages */ |
57467e56 | 2207 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2208 | |
2209 | /* Wake up anyone sleeping in poll */ | |
2210 | sk->sk_state_change(sk); | |
b97bf3fd | 2211 | res = 0; |
6f00089c | 2212 | } else { |
b97bf3fd PL |
2213 | res = -ENOTCONN; |
2214 | } | |
2215 | ||
0c3141e9 | 2216 | release_sock(sk); |
b97bf3fd PL |
2217 | return res; |
2218 | } | |
2219 | ||
f2f2a96a | 2220 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2221 | { |
f2f2a96a YX |
2222 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2223 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2224 | struct sk_buff *skb = NULL; |
57289015 | 2225 | u32 peer_port, peer_node; |
c5898636 | 2226 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2227 | |
6c9808ce | 2228 | bh_lock_sock(sk); |
d6fb7e9c | 2229 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2230 | bh_unlock_sock(sk); |
2231 | goto exit; | |
57289015 | 2232 | } |
301bae56 JPM |
2233 | peer_port = tsk_peer_port(tsk); |
2234 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2235 | |
8ea642ee | 2236 | if (tsk->probe_unacked) { |
b3be5e3e | 2237 | if (!sock_owned_by_user(sk)) { |
9fd4b070 | 2238 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
b3be5e3e EH |
2239 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2240 | tsk_peer_port(tsk)); | |
2241 | sk->sk_state_change(sk); | |
2242 | } else { | |
2243 | /* Try again later */ | |
2244 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2245 | } | |
2246 | ||
360aab6b PB |
2247 | bh_unlock_sock(sk); |
2248 | goto exit; | |
57289015 | 2249 | } |
360aab6b PB |
2250 | |
2251 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, | |
2252 | INT_H_SIZE, 0, peer_node, own_node, | |
2253 | peer_port, tsk->portid, TIPC_OK); | |
8ea642ee | 2254 | tsk->probe_unacked = true; |
360aab6b | 2255 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
57289015 | 2256 | bh_unlock_sock(sk); |
a6ca1094 | 2257 | if (skb) |
af9b028e | 2258 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2259 | exit: |
07f6c4bc | 2260 | sock_put(sk); |
57289015 JPM |
2261 | } |
2262 | ||
301bae56 | 2263 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2264 | struct tipc_name_seq const *seq) |
2265 | { | |
d6fb7e9c PB |
2266 | struct sock *sk = &tsk->sk; |
2267 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2268 | struct publication *publ; |
2269 | u32 key; | |
2270 | ||
d6fb7e9c | 2271 | if (tipc_sk_connected(sk)) |
0fc87aae | 2272 | return -EINVAL; |
07f6c4bc YX |
2273 | key = tsk->portid + tsk->pub_count + 1; |
2274 | if (key == tsk->portid) | |
0fc87aae JPM |
2275 | return -EADDRINUSE; |
2276 | ||
f2f9800d | 2277 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2278 | scope, tsk->portid, key); |
0fc87aae JPM |
2279 | if (unlikely(!publ)) |
2280 | return -EINVAL; | |
2281 | ||
301bae56 JPM |
2282 | list_add(&publ->pport_list, &tsk->publications); |
2283 | tsk->pub_count++; | |
2284 | tsk->published = 1; | |
0fc87aae JPM |
2285 | return 0; |
2286 | } | |
2287 | ||
301bae56 | 2288 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2289 | struct tipc_name_seq const *seq) |
2290 | { | |
f2f9800d | 2291 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2292 | struct publication *publ; |
2293 | struct publication *safe; | |
2294 | int rc = -EINVAL; | |
2295 | ||
301bae56 | 2296 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2297 | if (seq) { |
2298 | if (publ->scope != scope) | |
2299 | continue; | |
2300 | if (publ->type != seq->type) | |
2301 | continue; | |
2302 | if (publ->lower != seq->lower) | |
2303 | continue; | |
2304 | if (publ->upper != seq->upper) | |
2305 | break; | |
f2f9800d | 2306 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2307 | publ->ref, publ->key); |
2308 | rc = 0; | |
2309 | break; | |
2310 | } | |
f2f9800d | 2311 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2312 | publ->ref, publ->key); |
2313 | rc = 0; | |
2314 | } | |
301bae56 JPM |
2315 | if (list_empty(&tsk->publications)) |
2316 | tsk->published = 0; | |
0fc87aae JPM |
2317 | return rc; |
2318 | } | |
2319 | ||
5a9ee0be JPM |
2320 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2321 | * when we go from standalone to network mode. | |
2322 | */ | |
e05b31f4 | 2323 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2324 | { |
e05b31f4 | 2325 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2326 | const struct bucket_table *tbl; |
2327 | struct rhash_head *pos; | |
2328 | struct tipc_sock *tsk; | |
5a9ee0be | 2329 | struct tipc_msg *msg; |
07f6c4bc | 2330 | int i; |
5a9ee0be | 2331 | |
07f6c4bc | 2332 | rcu_read_lock(); |
e05b31f4 | 2333 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2334 | for (i = 0; i < tbl->size; i++) { |
2335 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2336 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2337 | msg = &tsk->phdr; | |
34747539 YX |
2338 | msg_set_prevnode(msg, tn->own_addr); |
2339 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2340 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2341 | } | |
5a9ee0be | 2342 | } |
07f6c4bc | 2343 | rcu_read_unlock(); |
5a9ee0be JPM |
2344 | } |
2345 | ||
e05b31f4 | 2346 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2347 | { |
e05b31f4 | 2348 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2349 | struct tipc_sock *tsk; |
808d90f9 | 2350 | |
07f6c4bc | 2351 | rcu_read_lock(); |
6cca7289 | 2352 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2353 | if (tsk) |
2354 | sock_hold(&tsk->sk); | |
2355 | rcu_read_unlock(); | |
808d90f9 | 2356 | |
07f6c4bc | 2357 | return tsk; |
808d90f9 JPM |
2358 | } |
2359 | ||
07f6c4bc | 2360 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2361 | { |
e05b31f4 YX |
2362 | struct sock *sk = &tsk->sk; |
2363 | struct net *net = sock_net(sk); | |
2364 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2365 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2366 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2367 | |
07f6c4bc YX |
2368 | while (remaining--) { |
2369 | portid++; | |
2370 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2371 | portid = TIPC_MIN_PORT; | |
2372 | tsk->portid = portid; | |
2373 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2374 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2375 | tsk_rht_params)) | |
07f6c4bc YX |
2376 | return 0; |
2377 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2378 | } |
2379 | ||
07f6c4bc | 2380 | return -1; |
808d90f9 JPM |
2381 | } |
2382 | ||
07f6c4bc | 2383 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2384 | { |
07f6c4bc | 2385 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2386 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2387 | |
6cca7289 | 2388 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2389 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2390 | __sock_put(sk); | |
808d90f9 | 2391 | } |
808d90f9 JPM |
2392 | } |
2393 | ||
6cca7289 HX |
2394 | static const struct rhashtable_params tsk_rht_params = { |
2395 | .nelem_hint = 192, | |
2396 | .head_offset = offsetof(struct tipc_sock, node), | |
2397 | .key_offset = offsetof(struct tipc_sock, portid), | |
2398 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2399 | .max_size = 1048576, |
2400 | .min_size = 256, | |
b5e2c150 | 2401 | .automatic_shrinking = true, |
6cca7289 HX |
2402 | }; |
2403 | ||
e05b31f4 | 2404 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2405 | { |
e05b31f4 | 2406 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2407 | |
2408 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2409 | } |
2410 | ||
e05b31f4 | 2411 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2412 | { |
e05b31f4 YX |
2413 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2414 | ||
07f6c4bc YX |
2415 | /* Wait for socket readers to complete */ |
2416 | synchronize_net(); | |
808d90f9 | 2417 | |
e05b31f4 | 2418 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2419 | } |
2420 | ||
b97bf3fd | 2421 | /** |
247f0f3c | 2422 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2423 | * @sock: socket structure |
2424 | * @lvl: option level | |
2425 | * @opt: option identifier | |
2426 | * @ov: pointer to new option value | |
2427 | * @ol: length of option value | |
c4307285 YH |
2428 | * |
2429 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2430 | * (to ease compatibility). |
c4307285 | 2431 | * |
b97bf3fd PL |
2432 | * Returns 0 on success, errno otherwise |
2433 | */ | |
247f0f3c YX |
2434 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2435 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2436 | { |
0c3141e9 | 2437 | struct sock *sk = sock->sk; |
58ed9442 | 2438 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2439 | u32 value; |
2440 | int res; | |
2441 | ||
c4307285 YH |
2442 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2443 | return 0; | |
b97bf3fd PL |
2444 | if (lvl != SOL_TIPC) |
2445 | return -ENOPROTOOPT; | |
2446 | if (ol < sizeof(value)) | |
2447 | return -EINVAL; | |
2db9983a AS |
2448 | res = get_user(value, (u32 __user *)ov); |
2449 | if (res) | |
b97bf3fd PL |
2450 | return res; |
2451 | ||
0c3141e9 | 2452 | lock_sock(sk); |
c4307285 | 2453 | |
b97bf3fd PL |
2454 | switch (opt) { |
2455 | case TIPC_IMPORTANCE: | |
301bae56 | 2456 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2457 | break; |
2458 | case TIPC_SRC_DROPPABLE: | |
2459 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2460 | tsk_set_unreliable(tsk, value); |
c4307285 | 2461 | else |
b97bf3fd PL |
2462 | res = -ENOPROTOOPT; |
2463 | break; | |
2464 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2465 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2466 | break; |
2467 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2468 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2469 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2470 | break; |
2471 | default: | |
2472 | res = -EINVAL; | |
2473 | } | |
2474 | ||
0c3141e9 AS |
2475 | release_sock(sk); |
2476 | ||
b97bf3fd PL |
2477 | return res; |
2478 | } | |
2479 | ||
2480 | /** | |
247f0f3c | 2481 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2482 | * @sock: socket structure |
2483 | * @lvl: option level | |
2484 | * @opt: option identifier | |
2485 | * @ov: receptacle for option value | |
2486 | * @ol: receptacle for length of option value | |
c4307285 YH |
2487 | * |
2488 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2489 | * (to ease compatibility). |
c4307285 | 2490 | * |
b97bf3fd PL |
2491 | * Returns 0 on success, errno otherwise |
2492 | */ | |
247f0f3c YX |
2493 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2494 | char __user *ov, int __user *ol) | |
b97bf3fd | 2495 | { |
0c3141e9 | 2496 | struct sock *sk = sock->sk; |
58ed9442 | 2497 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2498 | int len; |
b97bf3fd | 2499 | u32 value; |
c4307285 | 2500 | int res; |
b97bf3fd | 2501 | |
c4307285 YH |
2502 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2503 | return put_user(0, ol); | |
b97bf3fd PL |
2504 | if (lvl != SOL_TIPC) |
2505 | return -ENOPROTOOPT; | |
2db9983a AS |
2506 | res = get_user(len, ol); |
2507 | if (res) | |
c4307285 | 2508 | return res; |
b97bf3fd | 2509 | |
0c3141e9 | 2510 | lock_sock(sk); |
b97bf3fd PL |
2511 | |
2512 | switch (opt) { | |
2513 | case TIPC_IMPORTANCE: | |
301bae56 | 2514 | value = tsk_importance(tsk); |
b97bf3fd PL |
2515 | break; |
2516 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2517 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2518 | break; |
2519 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2520 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2521 | break; |
2522 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2523 | value = tsk->conn_timeout; |
0c3141e9 | 2524 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2525 | break; |
0e65967e | 2526 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2527 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2528 | break; |
0e65967e | 2529 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2530 | value = skb_queue_len(&sk->sk_receive_queue); |
2531 | break; | |
b97bf3fd PL |
2532 | default: |
2533 | res = -EINVAL; | |
2534 | } | |
2535 | ||
0c3141e9 AS |
2536 | release_sock(sk); |
2537 | ||
25860c3b PG |
2538 | if (res) |
2539 | return res; /* "get" failed */ | |
b97bf3fd | 2540 | |
25860c3b PG |
2541 | if (len < sizeof(value)) |
2542 | return -EINVAL; | |
2543 | ||
2544 | if (copy_to_user(ov, &value, sizeof(value))) | |
2545 | return -EFAULT; | |
2546 | ||
2547 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2548 | } |
2549 | ||
f2f9800d | 2550 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2551 | { |
f2f9800d | 2552 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2553 | struct tipc_sioc_ln_req lnr; |
2554 | void __user *argp = (void __user *)arg; | |
2555 | ||
2556 | switch (cmd) { | |
2557 | case SIOCGETLINKNAME: | |
2558 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2559 | return -EFAULT; | |
f2f9800d YX |
2560 | if (!tipc_node_get_linkname(sock_net(sk), |
2561 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2562 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2563 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2564 | return -EFAULT; | |
2565 | return 0; | |
2566 | } | |
2567 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2568 | default: |
2569 | return -ENOIOCTLCMD; | |
2570 | } | |
2571 | } | |
2572 | ||
ae86b9e3 BH |
2573 | /* Protocol switches for the various types of TIPC sockets */ |
2574 | ||
bca65eae | 2575 | static const struct proto_ops msg_ops = { |
0e65967e | 2576 | .owner = THIS_MODULE, |
b97bf3fd | 2577 | .family = AF_TIPC, |
247f0f3c YX |
2578 | .release = tipc_release, |
2579 | .bind = tipc_bind, | |
2580 | .connect = tipc_connect, | |
5eee6a6d | 2581 | .socketpair = sock_no_socketpair, |
245f3d34 | 2582 | .accept = sock_no_accept, |
247f0f3c YX |
2583 | .getname = tipc_getname, |
2584 | .poll = tipc_poll, | |
78acb1f9 | 2585 | .ioctl = tipc_ioctl, |
245f3d34 | 2586 | .listen = sock_no_listen, |
247f0f3c YX |
2587 | .shutdown = tipc_shutdown, |
2588 | .setsockopt = tipc_setsockopt, | |
2589 | .getsockopt = tipc_getsockopt, | |
2590 | .sendmsg = tipc_sendmsg, | |
2591 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2592 | .mmap = sock_no_mmap, |
2593 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2594 | }; |
2595 | ||
bca65eae | 2596 | static const struct proto_ops packet_ops = { |
0e65967e | 2597 | .owner = THIS_MODULE, |
b97bf3fd | 2598 | .family = AF_TIPC, |
247f0f3c YX |
2599 | .release = tipc_release, |
2600 | .bind = tipc_bind, | |
2601 | .connect = tipc_connect, | |
5eee6a6d | 2602 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2603 | .accept = tipc_accept, |
2604 | .getname = tipc_getname, | |
2605 | .poll = tipc_poll, | |
78acb1f9 | 2606 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2607 | .listen = tipc_listen, |
2608 | .shutdown = tipc_shutdown, | |
2609 | .setsockopt = tipc_setsockopt, | |
2610 | .getsockopt = tipc_getsockopt, | |
2611 | .sendmsg = tipc_send_packet, | |
2612 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2613 | .mmap = sock_no_mmap, |
2614 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2615 | }; |
2616 | ||
bca65eae | 2617 | static const struct proto_ops stream_ops = { |
0e65967e | 2618 | .owner = THIS_MODULE, |
b97bf3fd | 2619 | .family = AF_TIPC, |
247f0f3c YX |
2620 | .release = tipc_release, |
2621 | .bind = tipc_bind, | |
2622 | .connect = tipc_connect, | |
5eee6a6d | 2623 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2624 | .accept = tipc_accept, |
2625 | .getname = tipc_getname, | |
2626 | .poll = tipc_poll, | |
78acb1f9 | 2627 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2628 | .listen = tipc_listen, |
2629 | .shutdown = tipc_shutdown, | |
2630 | .setsockopt = tipc_setsockopt, | |
2631 | .getsockopt = tipc_getsockopt, | |
2632 | .sendmsg = tipc_send_stream, | |
2633 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2634 | .mmap = sock_no_mmap, |
2635 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2636 | }; |
2637 | ||
bca65eae | 2638 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2639 | .owner = THIS_MODULE, |
b97bf3fd | 2640 | .family = AF_TIPC, |
c5fa7b3c | 2641 | .create = tipc_sk_create |
b97bf3fd PL |
2642 | }; |
2643 | ||
2644 | static struct proto tipc_proto = { | |
2645 | .name = "TIPC", | |
2646 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2647 | .obj_size = sizeof(struct tipc_sock), |
2648 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2649 | }; |
2650 | ||
2651 | /** | |
4323add6 | 2652 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2653 | * |
b97bf3fd PL |
2654 | * Returns 0 on success, errno otherwise |
2655 | */ | |
4323add6 | 2656 | int tipc_socket_init(void) |
b97bf3fd PL |
2657 | { |
2658 | int res; | |
2659 | ||
c4307285 | 2660 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2661 | if (res) { |
2cf8aa19 | 2662 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2663 | goto out; |
2664 | } | |
2665 | ||
2666 | res = sock_register(&tipc_family_ops); | |
2667 | if (res) { | |
2cf8aa19 | 2668 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2669 | proto_unregister(&tipc_proto); |
2670 | goto out; | |
2671 | } | |
b97bf3fd PL |
2672 | out: |
2673 | return res; | |
2674 | } | |
2675 | ||
2676 | /** | |
4323add6 | 2677 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2678 | */ |
4323add6 | 2679 | void tipc_socket_stop(void) |
b97bf3fd | 2680 | { |
b97bf3fd PL |
2681 | sock_unregister(tipc_family_ops.family); |
2682 | proto_unregister(&tipc_proto); | |
2683 | } | |
34b78a12 RA |
2684 | |
2685 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2686 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2687 | { |
2688 | u32 peer_node; | |
2689 | u32 peer_port; | |
2690 | struct nlattr *nest; | |
2691 | ||
2692 | peer_node = tsk_peer_node(tsk); | |
2693 | peer_port = tsk_peer_port(tsk); | |
2694 | ||
2695 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2696 | ||
2697 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2698 | goto msg_full; | |
2699 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2700 | goto msg_full; | |
2701 | ||
2702 | if (tsk->conn_type != 0) { | |
2703 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2704 | goto msg_full; | |
2705 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2706 | goto msg_full; | |
2707 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2708 | goto msg_full; | |
2709 | } | |
2710 | nla_nest_end(skb, nest); | |
2711 | ||
2712 | return 0; | |
2713 | ||
2714 | msg_full: | |
2715 | nla_nest_cancel(skb, nest); | |
2716 | ||
2717 | return -EMSGSIZE; | |
2718 | } | |
2719 | ||
2720 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2721 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2722 | struct tipc_sock *tsk) | |
34b78a12 RA |
2723 | { |
2724 | int err; | |
2725 | void *hdr; | |
2726 | struct nlattr *attrs; | |
34747539 YX |
2727 | struct net *net = sock_net(skb->sk); |
2728 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2729 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2730 | |
2731 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2732 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2733 | if (!hdr) |
2734 | goto msg_cancel; | |
2735 | ||
2736 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2737 | if (!attrs) | |
2738 | goto genlmsg_cancel; | |
07f6c4bc | 2739 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2740 | goto attr_msg_cancel; |
34747539 | 2741 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2742 | goto attr_msg_cancel; |
2743 | ||
d6fb7e9c | 2744 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2745 | err = __tipc_nl_add_sk_con(skb, tsk); |
2746 | if (err) | |
2747 | goto attr_msg_cancel; | |
2748 | } else if (!list_empty(&tsk->publications)) { | |
2749 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2750 | goto attr_msg_cancel; | |
2751 | } | |
2752 | nla_nest_end(skb, attrs); | |
2753 | genlmsg_end(skb, hdr); | |
2754 | ||
2755 | return 0; | |
2756 | ||
2757 | attr_msg_cancel: | |
2758 | nla_nest_cancel(skb, attrs); | |
2759 | genlmsg_cancel: | |
2760 | genlmsg_cancel(skb, hdr); | |
2761 | msg_cancel: | |
2762 | return -EMSGSIZE; | |
2763 | } | |
2764 | ||
2765 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2766 | { | |
2767 | int err; | |
2768 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2769 | const struct bucket_table *tbl; |
2770 | struct rhash_head *pos; | |
e05b31f4 YX |
2771 | struct net *net = sock_net(skb->sk); |
2772 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2773 | u32 tbl_id = cb->args[0]; |
2774 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2775 | |
07f6c4bc | 2776 | rcu_read_lock(); |
e05b31f4 | 2777 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2778 | for (; tbl_id < tbl->size; tbl_id++) { |
2779 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2780 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2781 | if (prev_portid && prev_portid != tsk->portid) { |
2782 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2783 | continue; | |
2784 | } | |
2785 | ||
07f6c4bc | 2786 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2787 | if (err) { |
2788 | prev_portid = tsk->portid; | |
2789 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2790 | goto out; | |
2791 | } | |
2792 | prev_portid = 0; | |
07f6c4bc | 2793 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2794 | } |
34b78a12 | 2795 | } |
d6e164e3 | 2796 | out: |
07f6c4bc | 2797 | rcu_read_unlock(); |
d6e164e3 RA |
2798 | cb->args[0] = tbl_id; |
2799 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2800 | |
2801 | return skb->len; | |
2802 | } | |
1a1a143d RA |
2803 | |
2804 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2805 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2806 | struct netlink_callback *cb, | |
2807 | struct publication *publ) | |
1a1a143d RA |
2808 | { |
2809 | void *hdr; | |
2810 | struct nlattr *attrs; | |
2811 | ||
2812 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2813 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2814 | if (!hdr) |
2815 | goto msg_cancel; | |
2816 | ||
2817 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2818 | if (!attrs) | |
2819 | goto genlmsg_cancel; | |
2820 | ||
2821 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2822 | goto attr_msg_cancel; | |
2823 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2824 | goto attr_msg_cancel; | |
2825 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2826 | goto attr_msg_cancel; | |
2827 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2828 | goto attr_msg_cancel; | |
2829 | ||
2830 | nla_nest_end(skb, attrs); | |
2831 | genlmsg_end(skb, hdr); | |
2832 | ||
2833 | return 0; | |
2834 | ||
2835 | attr_msg_cancel: | |
2836 | nla_nest_cancel(skb, attrs); | |
2837 | genlmsg_cancel: | |
2838 | genlmsg_cancel(skb, hdr); | |
2839 | msg_cancel: | |
2840 | return -EMSGSIZE; | |
2841 | } | |
2842 | ||
2843 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2844 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2845 | struct netlink_callback *cb, | |
2846 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2847 | { |
2848 | int err; | |
2849 | struct publication *p; | |
2850 | ||
2851 | if (*last_publ) { | |
2852 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2853 | if (p->key == *last_publ) | |
2854 | break; | |
2855 | } | |
2856 | if (p->key != *last_publ) { | |
2857 | /* We never set seq or call nl_dump_check_consistent() | |
2858 | * this means that setting prev_seq here will cause the | |
2859 | * consistence check to fail in the netlink callback | |
2860 | * handler. Resulting in the last NLMSG_DONE message | |
2861 | * having the NLM_F_DUMP_INTR flag set. | |
2862 | */ | |
2863 | cb->prev_seq = 1; | |
2864 | *last_publ = 0; | |
2865 | return -EPIPE; | |
2866 | } | |
2867 | } else { | |
2868 | p = list_first_entry(&tsk->publications, struct publication, | |
2869 | pport_list); | |
2870 | } | |
2871 | ||
2872 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2873 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2874 | if (err) { | |
2875 | *last_publ = p->key; | |
2876 | return err; | |
2877 | } | |
2878 | } | |
2879 | *last_publ = 0; | |
2880 | ||
2881 | return 0; | |
2882 | } | |
2883 | ||
2884 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2885 | { | |
2886 | int err; | |
07f6c4bc | 2887 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2888 | u32 last_publ = cb->args[1]; |
2889 | u32 done = cb->args[2]; | |
e05b31f4 | 2890 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2891 | struct tipc_sock *tsk; |
2892 | ||
07f6c4bc | 2893 | if (!tsk_portid) { |
1a1a143d RA |
2894 | struct nlattr **attrs; |
2895 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2896 | ||
2897 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2898 | if (err) | |
2899 | return err; | |
2900 | ||
45e093ae RA |
2901 | if (!attrs[TIPC_NLA_SOCK]) |
2902 | return -EINVAL; | |
2903 | ||
1a1a143d RA |
2904 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2905 | attrs[TIPC_NLA_SOCK], | |
2906 | tipc_nl_sock_policy); | |
2907 | if (err) | |
2908 | return err; | |
2909 | ||
2910 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2911 | return -EINVAL; | |
2912 | ||
07f6c4bc | 2913 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2914 | } |
2915 | ||
2916 | if (done) | |
2917 | return 0; | |
2918 | ||
e05b31f4 | 2919 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2920 | if (!tsk) |
2921 | return -EINVAL; | |
2922 | ||
2923 | lock_sock(&tsk->sk); | |
2924 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2925 | if (!err) | |
2926 | done = 1; | |
2927 | release_sock(&tsk->sk); | |
07f6c4bc | 2928 | sock_put(&tsk->sk); |
1a1a143d | 2929 | |
07f6c4bc | 2930 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2931 | cb->args[1] = last_publ; |
2932 | cb->args[2] = done; | |
2933 | ||
2934 | return skb->len; | |
2935 | } |