Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
8826cde6 | 4 | * Copyright (c) 2001-2007, 2012-2014, 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 YX |
37 | #include <linux/rhashtable.h> |
38 | #include <linux/jhash.h> | |
b97bf3fd | 39 | #include "core.h" |
e2dafe87 | 40 | #include "name_table.h" |
78acb1f9 | 41 | #include "node.h" |
e2dafe87 | 42 | #include "link.h" |
5a9ee0be | 43 | #include "config.h" |
2e84c60b | 44 | #include "socket.h" |
2cf8aa19 | 45 | |
07f6c4bc YX |
46 | #define SS_LISTENING -1 /* socket is listening */ |
47 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 48 | |
07f6c4bc | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 50 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
51 | #define TIPC_FWD_MSG 1 |
52 | #define TIPC_CONN_OK 0 | |
53 | #define TIPC_CONN_PROBING 1 | |
54 | #define TIPC_MAX_PORT 0xffffffff | |
55 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
56 | |
57 | /** | |
58 | * struct tipc_sock - TIPC socket structure | |
59 | * @sk: socket - interacts with 'port' and with user via the socket API | |
60 | * @connected: non-zero if port is currently connected to a peer port | |
61 | * @conn_type: TIPC type used when connection was established | |
62 | * @conn_instance: TIPC instance used when connection was established | |
63 | * @published: non-zero if port has one or more associated names | |
64 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 65 | * @portid: unique port identity in TIPC socket hash table |
301bae56 JPM |
66 | * @phdr: preformatted message header used when sending messages |
67 | * @port_list: adjacent ports in TIPC's global list of ports | |
68 | * @publications: list of publications for port | |
69 | * @pub_count: total # of publications port has made during its lifetime | |
70 | * @probing_state: | |
2f55c437 | 71 | * @probing_intv: |
301bae56 JPM |
72 | * @port: port - interacts with 'sk' and with the rest of the TIPC stack |
73 | * @peer_name: the peer of the connection, if any | |
74 | * @conn_timeout: the time we can wait for an unresponded setup request | |
75 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
76 | * @link_cong: non-zero if owner must sleep because of link congestion | |
77 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
78 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
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; | |
84 | int connected; | |
85 | u32 conn_type; | |
86 | u32 conn_instance; | |
87 | int published; | |
88 | u32 max_pkt; | |
07f6c4bc | 89 | u32 portid; |
301bae56 JPM |
90 | struct tipc_msg phdr; |
91 | struct list_head sock_list; | |
92 | struct list_head publications; | |
93 | u32 pub_count; | |
94 | u32 probing_state; | |
2f55c437 | 95 | unsigned long probing_intv; |
301bae56 JPM |
96 | uint conn_timeout; |
97 | atomic_t dupl_rcvcnt; | |
98 | bool link_cong; | |
99 | uint sent_unacked; | |
100 | uint rcv_unacked; | |
07f6c4bc YX |
101 | struct rhash_head node; |
102 | struct rcu_head rcu; | |
301bae56 | 103 | }; |
b97bf3fd | 104 | |
4f4482dc | 105 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 106 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 107 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
108 | static int tipc_release(struct socket *sock); |
109 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 110 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 111 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 112 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 113 | struct tipc_name_seq const *seq); |
301bae56 | 114 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
e05b31f4 | 116 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
117 | static int tipc_sk_insert(struct tipc_sock *tsk); |
118 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
b97bf3fd | 119 | |
bca65eae FW |
120 | static const struct proto_ops packet_ops; |
121 | static const struct proto_ops stream_ops; | |
122 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
123 | |
124 | static struct proto tipc_proto; | |
c5fa7b3c | 125 | static struct proto tipc_proto_kern; |
b97bf3fd | 126 | |
1a1a143d RA |
127 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
128 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
129 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
130 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
131 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
132 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
133 | }; | |
134 | ||
c4307285 | 135 | /* |
0c3141e9 AS |
136 | * Revised TIPC socket locking policy: |
137 | * | |
138 | * Most socket operations take the standard socket lock when they start | |
139 | * and hold it until they finish (or until they need to sleep). Acquiring | |
140 | * this lock grants the owner exclusive access to the fields of the socket | |
141 | * data structures, with the exception of the backlog queue. A few socket | |
142 | * operations can be done without taking the socket lock because they only | |
143 | * read socket information that never changes during the life of the socket. | |
144 | * | |
145 | * Socket operations may acquire the lock for the associated TIPC port if they | |
146 | * need to perform an operation on the port. If any routine needs to acquire | |
147 | * both the socket lock and the port lock it must take the socket lock first | |
148 | * to avoid the risk of deadlock. | |
149 | * | |
150 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
151 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
152 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
153 | * and either handles the message itself or adds it to the socket's backlog | |
154 | * queue; in the latter case the queued message is processed once the process | |
155 | * owning the socket lock releases it. | |
156 | * | |
157 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
158 | * the problem of a blocked socket operation preventing any other operations | |
159 | * from occurring. However, applications must be careful if they have | |
160 | * multiple threads trying to send (or receive) on the same socket, as these | |
161 | * operations might interfere with each other. For example, doing a connect | |
162 | * and a receive at the same time might allow the receive to consume the | |
163 | * ACK message meant for the connect. While additional work could be done | |
164 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
165 | * | |
166 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
167 | * that another operation that must be performed in a non-blocking manner is | |
168 | * not delayed for very long because the lock has already been taken. | |
169 | * | |
170 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
171 | * constant over its lifetime; such fields can be examined without taking | |
172 | * the socket lock and/or port lock, and do not need to be re-read even | |
173 | * after resuming processing after waiting. These fields include: | |
174 | * - socket type | |
175 | * - pointer to socket sk structure (aka tipc_sock structure) | |
176 | * - pointer to port structure | |
177 | * - port reference | |
178 | */ | |
179 | ||
301bae56 | 180 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 181 | { |
301bae56 | 182 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
183 | } |
184 | ||
301bae56 | 185 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 186 | { |
301bae56 | 187 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
188 | } |
189 | ||
301bae56 | 190 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 191 | { |
301bae56 | 192 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
193 | } |
194 | ||
301bae56 | 195 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 196 | { |
301bae56 | 197 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
198 | } |
199 | ||
301bae56 | 200 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 201 | { |
301bae56 | 202 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
203 | } |
204 | ||
301bae56 | 205 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 206 | { |
301bae56 | 207 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
208 | } |
209 | ||
301bae56 | 210 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 211 | { |
301bae56 | 212 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
213 | } |
214 | ||
301bae56 | 215 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
216 | { |
217 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
218 | return -EINVAL; | |
301bae56 | 219 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
220 | return 0; |
221 | } | |
8826cde6 | 222 | |
301bae56 JPM |
223 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
224 | { | |
225 | return container_of(sk, struct tipc_sock, sk); | |
226 | } | |
227 | ||
228 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
229 | { | |
230 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
231 | } | |
232 | ||
0c3141e9 | 233 | /** |
2e84c60b | 234 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
235 | * |
236 | * Caller must hold socket lock | |
b97bf3fd | 237 | */ |
2e84c60b | 238 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 239 | { |
5f6d9123 | 240 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
241 | } |
242 | ||
b97bf3fd | 243 | /** |
2e84c60b | 244 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
245 | * |
246 | * Caller must hold socket lock | |
b97bf3fd | 247 | */ |
2e84c60b | 248 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 249 | { |
a6ca1094 | 250 | struct sk_buff *skb; |
8db1bae3 | 251 | u32 dnode; |
34747539 | 252 | struct net *net = sock_net(sk); |
0c3141e9 | 253 | |
a6ca1094 | 254 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
34747539 YX |
255 | if (tipc_msg_reverse(net, skb, &dnode, TIPC_ERR_NO_PORT)) |
256 | tipc_link_xmit_skb(net, skb, dnode, 0); | |
8db1bae3 | 257 | } |
b97bf3fd PL |
258 | } |
259 | ||
2e84c60b | 260 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
261 | * |
262 | * Handles cases where the node's network address has changed from | |
263 | * the default of <0.0.0> to its configured setting. | |
264 | */ | |
2e84c60b | 265 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 266 | { |
34747539 | 267 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 268 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
269 | u32 orig_node; |
270 | u32 peer_node; | |
271 | ||
301bae56 | 272 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
273 | return false; |
274 | ||
275 | if (unlikely(msg_origport(msg) != peer_port)) | |
276 | return false; | |
277 | ||
278 | orig_node = msg_orignode(msg); | |
301bae56 | 279 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
280 | |
281 | if (likely(orig_node == peer_node)) | |
282 | return true; | |
283 | ||
34747539 | 284 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
285 | return true; |
286 | ||
34747539 | 287 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
288 | return true; |
289 | ||
290 | return false; | |
291 | } | |
292 | ||
b97bf3fd | 293 | /** |
c5fa7b3c | 294 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 295 | * @net: network namespace (must be default network) |
b97bf3fd PL |
296 | * @sock: pre-allocated socket structure |
297 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 298 | * @kern: caused by kernel or by userspace? |
c4307285 | 299 | * |
0c3141e9 AS |
300 | * This routine creates additional data structures used by the TIPC socket, |
301 | * initializes them, and links them together. | |
b97bf3fd PL |
302 | * |
303 | * Returns 0 on success, errno otherwise | |
304 | */ | |
58ed9442 JPM |
305 | static int tipc_sk_create(struct net *net, struct socket *sock, |
306 | int protocol, int kern) | |
b97bf3fd | 307 | { |
0c3141e9 AS |
308 | const struct proto_ops *ops; |
309 | socket_state state; | |
b97bf3fd | 310 | struct sock *sk; |
58ed9442 | 311 | struct tipc_sock *tsk; |
5b8fa7ce | 312 | struct tipc_msg *msg; |
0c3141e9 AS |
313 | |
314 | /* Validate arguments */ | |
b97bf3fd PL |
315 | if (unlikely(protocol != 0)) |
316 | return -EPROTONOSUPPORT; | |
317 | ||
b97bf3fd PL |
318 | switch (sock->type) { |
319 | case SOCK_STREAM: | |
0c3141e9 AS |
320 | ops = &stream_ops; |
321 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
322 | break; |
323 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
324 | ops = &packet_ops; |
325 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
326 | break; |
327 | case SOCK_DGRAM: | |
b97bf3fd | 328 | case SOCK_RDM: |
0c3141e9 AS |
329 | ops = &msg_ops; |
330 | state = SS_READY; | |
b97bf3fd | 331 | break; |
49978651 | 332 | default: |
49978651 | 333 | return -EPROTOTYPE; |
b97bf3fd PL |
334 | } |
335 | ||
0c3141e9 | 336 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
337 | if (!kern) |
338 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
339 | else | |
340 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
341 | ||
0c3141e9 | 342 | if (sk == NULL) |
b97bf3fd | 343 | return -ENOMEM; |
b97bf3fd | 344 | |
58ed9442 | 345 | tsk = tipc_sk(sk); |
301bae56 | 346 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
347 | INIT_LIST_HEAD(&tsk->publications); |
348 | msg = &tsk->phdr; | |
34747539 | 349 | tipc_msg_init(net, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
5b8fa7ce | 350 | NAMED_H_SIZE, 0); |
b97bf3fd | 351 | |
0c3141e9 | 352 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
353 | sock->ops = ops; |
354 | sock->state = state; | |
0c3141e9 | 355 | sock_init_data(sock, sk); |
07f6c4bc YX |
356 | if (tipc_sk_insert(tsk)) { |
357 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
358 | return -EINVAL; | |
359 | } | |
360 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 361 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 362 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 363 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
364 | sk->sk_data_ready = tipc_data_ready; |
365 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 366 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 367 | tsk->sent_unacked = 0; |
4f4482dc | 368 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 369 | |
0c3141e9 | 370 | if (sock->state == SS_READY) { |
301bae56 | 371 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 372 | if (sock->type == SOCK_DGRAM) |
301bae56 | 373 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 374 | } |
b97bf3fd PL |
375 | return 0; |
376 | } | |
377 | ||
c5fa7b3c YX |
378 | /** |
379 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
380 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
381 | * | |
382 | * We cannot use sock_creat_kern here because it bumps module user count. | |
383 | * Since socket owner and creator is the same module we must make sure | |
384 | * that module count remains zero for module local sockets, otherwise | |
385 | * we cannot do rmmod. | |
386 | * | |
387 | * Returns 0 on success, errno otherwise | |
388 | */ | |
a62fbcce | 389 | int tipc_sock_create_local(struct net *net, int type, struct socket **res) |
c5fa7b3c YX |
390 | { |
391 | int rc; | |
c5fa7b3c YX |
392 | |
393 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
394 | if (rc < 0) { | |
395 | pr_err("Failed to create kernel socket\n"); | |
396 | return rc; | |
397 | } | |
a62fbcce | 398 | tipc_sk_create(net, *res, 0, 1); |
c5fa7b3c | 399 | |
c5fa7b3c YX |
400 | return 0; |
401 | } | |
402 | ||
403 | /** | |
404 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
405 | * @sock: the socket to be released. | |
406 | * | |
407 | * Module reference count is not incremented when such sockets are created, | |
408 | * so we must keep it from being decremented when they are released. | |
409 | */ | |
410 | void tipc_sock_release_local(struct socket *sock) | |
411 | { | |
247f0f3c | 412 | tipc_release(sock); |
c5fa7b3c YX |
413 | sock->ops = NULL; |
414 | sock_release(sock); | |
415 | } | |
416 | ||
417 | /** | |
418 | * tipc_sock_accept_local - accept a connection on a socket created | |
419 | * with tipc_sock_create_local. Use this function to avoid that | |
420 | * module reference count is inadvertently incremented. | |
421 | * | |
422 | * @sock: the accepting socket | |
423 | * @newsock: reference to the new socket to be created | |
424 | * @flags: socket flags | |
425 | */ | |
426 | ||
427 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 428 | int flags) |
c5fa7b3c YX |
429 | { |
430 | struct sock *sk = sock->sk; | |
431 | int ret; | |
432 | ||
433 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
434 | sk->sk_protocol, newsock); | |
435 | if (ret < 0) | |
436 | return ret; | |
437 | ||
247f0f3c | 438 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
439 | if (ret < 0) { |
440 | sock_release(*newsock); | |
441 | return ret; | |
442 | } | |
443 | (*newsock)->ops = sock->ops; | |
444 | return ret; | |
445 | } | |
446 | ||
07f6c4bc YX |
447 | static void tipc_sk_callback(struct rcu_head *head) |
448 | { | |
449 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
450 | ||
451 | sock_put(&tsk->sk); | |
452 | } | |
453 | ||
b97bf3fd | 454 | /** |
247f0f3c | 455 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
456 | * @sock: socket to destroy |
457 | * | |
458 | * This routine cleans up any messages that are still queued on the socket. | |
459 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
460 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
461 | * and any others are discarded. (If the first message on a STREAM socket | |
462 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 463 | * |
b97bf3fd PL |
464 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
465 | * are returned or discarded according to the "destination droppable" setting | |
466 | * specified for the message by the sender. | |
467 | * | |
468 | * Returns 0 on success, errno otherwise | |
469 | */ | |
247f0f3c | 470 | static int tipc_release(struct socket *sock) |
b97bf3fd | 471 | { |
b97bf3fd | 472 | struct sock *sk = sock->sk; |
357c4774 SL |
473 | struct net *net; |
474 | struct tipc_net *tn; | |
58ed9442 | 475 | struct tipc_sock *tsk; |
a6ca1094 | 476 | struct sk_buff *skb; |
f2f2a96a | 477 | u32 dnode, probing_state; |
b97bf3fd | 478 | |
0c3141e9 AS |
479 | /* |
480 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
481 | * releases a pre-allocated child socket that was never used) | |
482 | */ | |
0c3141e9 | 483 | if (sk == NULL) |
b97bf3fd | 484 | return 0; |
c4307285 | 485 | |
357c4774 SL |
486 | net = sock_net(sk); |
487 | tn = net_generic(net, tipc_net_id); | |
488 | ||
58ed9442 | 489 | tsk = tipc_sk(sk); |
0c3141e9 AS |
490 | lock_sock(sk); |
491 | ||
492 | /* | |
493 | * Reject all unreceived messages, except on an active connection | |
494 | * (which disconnects locally & sends a 'FIN+' to peer) | |
495 | */ | |
301bae56 | 496 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 497 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
498 | skb = __skb_dequeue(&sk->sk_receive_queue); |
499 | if (skb == NULL) | |
b97bf3fd | 500 | break; |
a6ca1094 YX |
501 | if (TIPC_SKB_CB(skb)->handle != NULL) |
502 | kfree_skb(skb); | |
0c3141e9 AS |
503 | else { |
504 | if ((sock->state == SS_CONNECTING) || | |
505 | (sock->state == SS_CONNECTED)) { | |
506 | sock->state = SS_DISCONNECTING; | |
301bae56 | 507 | tsk->connected = 0; |
f2f9800d | 508 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 509 | } |
34747539 YX |
510 | if (tipc_msg_reverse(net, skb, &dnode, |
511 | TIPC_ERR_NO_PORT)) | |
f2f9800d | 512 | tipc_link_xmit_skb(net, skb, dnode, 0); |
0c3141e9 | 513 | } |
b97bf3fd PL |
514 | } |
515 | ||
301bae56 | 516 | tipc_sk_withdraw(tsk, 0, NULL); |
f2f2a96a | 517 | probing_state = tsk->probing_state; |
3721e9c7 YX |
518 | if (del_timer_sync(&sk->sk_timer) && |
519 | probing_state != TIPC_CONN_PROBING) | |
f2f2a96a | 520 | sock_put(sk); |
07f6c4bc | 521 | tipc_sk_remove(tsk); |
301bae56 | 522 | if (tsk->connected) { |
34747539 YX |
523 | skb = tipc_msg_create(net, TIPC_CRITICAL_IMPORTANCE, |
524 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
525 | tn->own_addr, tsk_peer_port(tsk), | |
07f6c4bc | 526 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 527 | if (skb) |
f2f9800d YX |
528 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
529 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
5b8fa7ce | 530 | } |
b97bf3fd | 531 | |
0c3141e9 | 532 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 533 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 534 | |
0c3141e9 | 535 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
536 | sock->state = SS_DISCONNECTING; |
537 | release_sock(sk); | |
07f6c4bc YX |
538 | |
539 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 540 | sock->sk = NULL; |
b97bf3fd | 541 | |
065d7e39 | 542 | return 0; |
b97bf3fd PL |
543 | } |
544 | ||
545 | /** | |
247f0f3c | 546 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
547 | * @sock: socket structure |
548 | * @uaddr: socket address describing name(s) and desired operation | |
549 | * @uaddr_len: size of socket address data structure | |
c4307285 | 550 | * |
b97bf3fd PL |
551 | * Name and name sequence binding is indicated using a positive scope value; |
552 | * a negative scope value unbinds the specified name. Specifying no name | |
553 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 554 | * |
b97bf3fd | 555 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
556 | * |
557 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
558 | * access any non-constant socket information. | |
b97bf3fd | 559 | */ |
247f0f3c YX |
560 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
561 | int uaddr_len) | |
b97bf3fd | 562 | { |
84602761 | 563 | struct sock *sk = sock->sk; |
b97bf3fd | 564 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 565 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 566 | int res = -EINVAL; |
b97bf3fd | 567 | |
84602761 YX |
568 | lock_sock(sk); |
569 | if (unlikely(!uaddr_len)) { | |
301bae56 | 570 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
571 | goto exit; |
572 | } | |
c4307285 | 573 | |
84602761 YX |
574 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
575 | res = -EINVAL; | |
576 | goto exit; | |
577 | } | |
578 | if (addr->family != AF_TIPC) { | |
579 | res = -EAFNOSUPPORT; | |
580 | goto exit; | |
581 | } | |
b97bf3fd | 582 | |
b97bf3fd PL |
583 | if (addr->addrtype == TIPC_ADDR_NAME) |
584 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
585 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
586 | res = -EAFNOSUPPORT; | |
587 | goto exit; | |
588 | } | |
c4307285 | 589 | |
13a2e898 | 590 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 591 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
592 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
593 | res = -EACCES; | |
594 | goto exit; | |
595 | } | |
c422f1bd | 596 | |
84602761 | 597 | res = (addr->scope > 0) ? |
301bae56 JPM |
598 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
599 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
600 | exit: |
601 | release_sock(sk); | |
602 | return res; | |
b97bf3fd PL |
603 | } |
604 | ||
c4307285 | 605 | /** |
247f0f3c | 606 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
607 | * @sock: socket structure |
608 | * @uaddr: area for returned socket address | |
609 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 610 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 611 | * |
b97bf3fd | 612 | * Returns 0 on success, errno otherwise |
0c3141e9 | 613 | * |
2da59918 AS |
614 | * NOTE: This routine doesn't need to take the socket lock since it only |
615 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 616 | * a completely predictable manner). |
b97bf3fd | 617 | */ |
247f0f3c YX |
618 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
619 | int *uaddr_len, int peer) | |
b97bf3fd | 620 | { |
b97bf3fd | 621 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 622 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 623 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 624 | |
88f8a5e3 | 625 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 626 | if (peer) { |
2da59918 AS |
627 | if ((sock->state != SS_CONNECTED) && |
628 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
629 | return -ENOTCONN; | |
301bae56 JPM |
630 | addr->addr.id.ref = tsk_peer_port(tsk); |
631 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 632 | } else { |
07f6c4bc | 633 | addr->addr.id.ref = tsk->portid; |
34747539 | 634 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 635 | } |
b97bf3fd PL |
636 | |
637 | *uaddr_len = sizeof(*addr); | |
638 | addr->addrtype = TIPC_ADDR_ID; | |
639 | addr->family = AF_TIPC; | |
640 | addr->scope = 0; | |
b97bf3fd PL |
641 | addr->addr.name.domain = 0; |
642 | ||
0c3141e9 | 643 | return 0; |
b97bf3fd PL |
644 | } |
645 | ||
646 | /** | |
247f0f3c | 647 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
648 | * @file: file structure associated with the socket |
649 | * @sock: socket for which to calculate the poll bits | |
650 | * @wait: ??? | |
651 | * | |
9b674e82 AS |
652 | * Returns pollmask value |
653 | * | |
654 | * COMMENTARY: | |
655 | * It appears that the usual socket locking mechanisms are not useful here | |
656 | * since the pollmask info is potentially out-of-date the moment this routine | |
657 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
658 | * to handle any preventable race conditions, so TIPC will do the same ... | |
659 | * | |
660 | * TIPC sets the returned events as follows: | |
f662c070 AS |
661 | * |
662 | * socket state flags set | |
663 | * ------------ --------- | |
664 | * unconnected no read flags | |
c4fc298a | 665 | * POLLOUT if port is not congested |
f662c070 AS |
666 | * |
667 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
668 | * no write flags | |
669 | * | |
670 | * connected POLLIN/POLLRDNORM if data in rx queue | |
671 | * POLLOUT if port is not congested | |
672 | * | |
673 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
674 | * no write flags | |
675 | * | |
676 | * listening POLLIN if SYN in rx queue | |
677 | * no write flags | |
678 | * | |
679 | * ready POLLIN/POLLRDNORM if data in rx queue | |
680 | * [connectionless] POLLOUT (since port cannot be congested) | |
681 | * | |
682 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
683 | * imply that the operation will succeed, merely that it should be performed | |
684 | * and will not block. | |
b97bf3fd | 685 | */ |
247f0f3c YX |
686 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
687 | poll_table *wait) | |
b97bf3fd | 688 | { |
9b674e82 | 689 | struct sock *sk = sock->sk; |
58ed9442 | 690 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 691 | u32 mask = 0; |
9b674e82 | 692 | |
f288bef4 | 693 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 694 | |
f662c070 | 695 | switch ((int)sock->state) { |
c4fc298a | 696 | case SS_UNCONNECTED: |
60120526 | 697 | if (!tsk->link_cong) |
c4fc298a EH |
698 | mask |= POLLOUT; |
699 | break; | |
f662c070 AS |
700 | case SS_READY: |
701 | case SS_CONNECTED: | |
301bae56 | 702 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
703 | mask |= POLLOUT; |
704 | /* fall thru' */ | |
705 | case SS_CONNECTING: | |
706 | case SS_LISTENING: | |
707 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
708 | mask |= (POLLIN | POLLRDNORM); | |
709 | break; | |
710 | case SS_DISCONNECTING: | |
711 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
712 | break; | |
713 | } | |
9b674e82 AS |
714 | |
715 | return mask; | |
b97bf3fd PL |
716 | } |
717 | ||
0abd8ff2 JPM |
718 | /** |
719 | * tipc_sendmcast - send multicast message | |
720 | * @sock: socket structure | |
721 | * @seq: destination address | |
562640f3 | 722 | * @msg: message to send |
0abd8ff2 JPM |
723 | * @dsz: total length of message data |
724 | * @timeo: timeout to wait for wakeup | |
725 | * | |
726 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
727 | * Returns the number of bytes sent on success, or errno | |
728 | */ | |
729 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 730 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
731 | { |
732 | struct sock *sk = sock->sk; | |
f2f9800d | 733 | struct net *net = sock_net(sk); |
301bae56 | 734 | struct tipc_msg *mhdr = &tipc_sk(sk)->phdr; |
a6ca1094 | 735 | struct sk_buff_head head; |
0abd8ff2 JPM |
736 | uint mtu; |
737 | int rc; | |
738 | ||
739 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
740 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
741 | msg_set_destport(mhdr, 0); | |
742 | msg_set_destnode(mhdr, 0); | |
743 | msg_set_nametype(mhdr, seq->type); | |
744 | msg_set_namelower(mhdr, seq->lower); | |
745 | msg_set_nameupper(mhdr, seq->upper); | |
746 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
747 | ||
748 | new_mtu: | |
749 | mtu = tipc_bclink_get_mtu(); | |
a6ca1094 | 750 | __skb_queue_head_init(&head); |
34747539 | 751 | rc = tipc_msg_build(net, mhdr, msg, 0, dsz, mtu, &head); |
0abd8ff2 JPM |
752 | if (unlikely(rc < 0)) |
753 | return rc; | |
754 | ||
755 | do { | |
f2f9800d | 756 | rc = tipc_bclink_xmit(net, &head); |
0abd8ff2 JPM |
757 | if (likely(rc >= 0)) { |
758 | rc = dsz; | |
759 | break; | |
760 | } | |
761 | if (rc == -EMSGSIZE) | |
762 | goto new_mtu; | |
763 | if (rc != -ELINKCONG) | |
764 | break; | |
50100a5e | 765 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
766 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
767 | if (rc) | |
a6ca1094 | 768 | __skb_queue_purge(&head); |
0abd8ff2 JPM |
769 | } while (!rc); |
770 | return rc; | |
771 | } | |
772 | ||
078bec82 JPM |
773 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
774 | */ | |
f2f9800d | 775 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff *buf) |
078bec82 JPM |
776 | { |
777 | struct tipc_msg *msg = buf_msg(buf); | |
778 | struct tipc_port_list dports = {0, NULL, }; | |
779 | struct tipc_port_list *item; | |
780 | struct sk_buff *b; | |
781 | uint i, last, dst = 0; | |
782 | u32 scope = TIPC_CLUSTER_SCOPE; | |
783 | ||
34747539 | 784 | if (in_own_node(net, msg_orignode(msg))) |
078bec82 JPM |
785 | scope = TIPC_NODE_SCOPE; |
786 | ||
787 | /* Create destination port list: */ | |
4ac1c8d0 YX |
788 | tipc_nametbl_mc_translate(net, msg_nametype(msg), msg_namelower(msg), |
789 | msg_nameupper(msg), scope, &dports); | |
078bec82 JPM |
790 | last = dports.count; |
791 | if (!last) { | |
792 | kfree_skb(buf); | |
793 | return; | |
794 | } | |
795 | ||
796 | for (item = &dports; item; item = item->next) { | |
797 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { | |
798 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; | |
799 | if (!b) { | |
800 | pr_warn("Failed do clone mcast rcv buffer\n"); | |
801 | continue; | |
802 | } | |
803 | msg_set_destport(msg, item->ports[i]); | |
f2f9800d | 804 | tipc_sk_rcv(net, b); |
078bec82 JPM |
805 | } |
806 | } | |
807 | tipc_port_list_free(&dports); | |
808 | } | |
809 | ||
ac0074ee JPM |
810 | /** |
811 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
812 | * @tsk: receiving socket | |
813 | * @dnode: node to send response message to, if any | |
814 | * @buf: buffer containing protocol message | |
815 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if | |
816 | * (CONN_PROBE_REPLY) message should be forwarded. | |
817 | */ | |
52f50ce5 WY |
818 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
819 | struct sk_buff *buf) | |
ac0074ee JPM |
820 | { |
821 | struct tipc_msg *msg = buf_msg(buf); | |
60120526 | 822 | int conn_cong; |
ac0074ee JPM |
823 | |
824 | /* Ignore if connection cannot be validated: */ | |
2e84c60b | 825 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
826 | goto exit; |
827 | ||
301bae56 | 828 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
829 | |
830 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 831 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
832 | tsk->sent_unacked -= msg_msgcnt(msg); |
833 | if (conn_cong) | |
50100a5e | 834 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee | 835 | } else if (msg_type(msg) == CONN_PROBE) { |
34747539 | 836 | if (!tipc_msg_reverse(sock_net(&tsk->sk), buf, dnode, TIPC_OK)) |
ac0074ee JPM |
837 | return TIPC_OK; |
838 | msg_set_type(msg, CONN_PROBE_REPLY); | |
839 | return TIPC_FWD_MSG; | |
840 | } | |
841 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
842 | exit: | |
843 | kfree_skb(buf); | |
844 | return TIPC_OK; | |
845 | } | |
846 | ||
3f40504f YX |
847 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
848 | { | |
849 | struct sock *sk = sock->sk; | |
58ed9442 | 850 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
851 | DEFINE_WAIT(wait); |
852 | int done; | |
853 | ||
854 | do { | |
855 | int err = sock_error(sk); | |
856 | if (err) | |
857 | return err; | |
858 | if (sock->state == SS_DISCONNECTING) | |
859 | return -EPIPE; | |
860 | if (!*timeo_p) | |
861 | return -EAGAIN; | |
862 | if (signal_pending(current)) | |
863 | return sock_intr_errno(*timeo_p); | |
864 | ||
865 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 866 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
867 | finish_wait(sk_sleep(sk), &wait); |
868 | } while (!done); | |
869 | return 0; | |
870 | } | |
871 | ||
b97bf3fd | 872 | /** |
247f0f3c | 873 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 874 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
875 | * @sock: socket structure |
876 | * @m: message to send | |
e2dafe87 | 877 | * @dsz: amount of user data to be sent |
c4307285 | 878 | * |
b97bf3fd | 879 | * Message must have an destination specified explicitly. |
c4307285 | 880 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
881 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
882 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 883 | * |
b97bf3fd PL |
884 | * Returns the number of bytes sent on success, or errno otherwise |
885 | */ | |
247f0f3c | 886 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
e2dafe87 | 887 | struct msghdr *m, size_t dsz) |
b97bf3fd | 888 | { |
e2dafe87 | 889 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 890 | struct sock *sk = sock->sk; |
58ed9442 | 891 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 892 | struct net *net = sock_net(sk); |
301bae56 | 893 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 894 | u32 dnode, dport; |
a6ca1094 YX |
895 | struct sk_buff_head head; |
896 | struct sk_buff *skb; | |
e2dafe87 JPM |
897 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
898 | u32 mtu; | |
3f40504f | 899 | long timeo; |
88b17b6a | 900 | int rc; |
b97bf3fd PL |
901 | |
902 | if (unlikely(!dest)) | |
903 | return -EDESTADDRREQ; | |
e2dafe87 | 904 | |
51f9cc1f AS |
905 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
906 | (dest->family != AF_TIPC))) | |
b97bf3fd | 907 | return -EINVAL; |
e2dafe87 JPM |
908 | |
909 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 910 | return -EMSGSIZE; |
b97bf3fd | 911 | |
0c3141e9 AS |
912 | if (iocb) |
913 | lock_sock(sk); | |
914 | ||
e2dafe87 | 915 | if (unlikely(sock->state != SS_READY)) { |
0c3141e9 | 916 | if (sock->state == SS_LISTENING) { |
e2dafe87 | 917 | rc = -EPIPE; |
0c3141e9 AS |
918 | goto exit; |
919 | } | |
920 | if (sock->state != SS_UNCONNECTED) { | |
e2dafe87 | 921 | rc = -EISCONN; |
0c3141e9 AS |
922 | goto exit; |
923 | } | |
301bae56 | 924 | if (tsk->published) { |
e2dafe87 | 925 | rc = -EOPNOTSUPP; |
0c3141e9 AS |
926 | goto exit; |
927 | } | |
3388007b | 928 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
929 | tsk->conn_type = dest->addr.name.name.type; |
930 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 931 | } |
b97bf3fd PL |
932 | } |
933 | ||
3f40504f | 934 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
935 | |
936 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
562640f3 | 937 | rc = tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
938 | goto exit; |
939 | } else if (dest->addrtype == TIPC_ADDR_NAME) { | |
940 | u32 type = dest->addr.name.name.type; | |
941 | u32 inst = dest->addr.name.name.instance; | |
942 | u32 domain = dest->addr.name.domain; | |
943 | ||
944 | dnode = domain; | |
945 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
946 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
947 | msg_set_nametype(mhdr, type); | |
948 | msg_set_nameinst(mhdr, inst); | |
949 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 950 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
951 | msg_set_destnode(mhdr, dnode); |
952 | msg_set_destport(mhdr, dport); | |
953 | if (unlikely(!dport && !dnode)) { | |
954 | rc = -EHOSTUNREACH; | |
955 | goto exit; | |
c4307285 | 956 | } |
e2dafe87 JPM |
957 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
958 | dnode = dest->addr.id.node; | |
959 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
960 | msg_set_lookup_scope(mhdr, 0); | |
961 | msg_set_destnode(mhdr, dnode); | |
962 | msg_set_destport(mhdr, dest->addr.id.ref); | |
963 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
964 | } | |
965 | ||
966 | new_mtu: | |
f2f9800d | 967 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
a6ca1094 | 968 | __skb_queue_head_init(&head); |
34747539 | 969 | rc = tipc_msg_build(net, mhdr, m, 0, dsz, mtu, &head); |
e2dafe87 JPM |
970 | if (rc < 0) |
971 | goto exit; | |
972 | ||
973 | do { | |
a6ca1094 YX |
974 | skb = skb_peek(&head); |
975 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; | |
f2f9800d | 976 | rc = tipc_link_xmit(net, &head, dnode, tsk->portid); |
e2dafe87 JPM |
977 | if (likely(rc >= 0)) { |
978 | if (sock->state != SS_READY) | |
0c3141e9 | 979 | sock->state = SS_CONNECTING; |
e2dafe87 | 980 | rc = dsz; |
0c3141e9 | 981 | break; |
c4307285 | 982 | } |
e2dafe87 JPM |
983 | if (rc == -EMSGSIZE) |
984 | goto new_mtu; | |
e2dafe87 | 985 | if (rc != -ELINKCONG) |
0c3141e9 | 986 | break; |
50100a5e | 987 | tsk->link_cong = 1; |
e2dafe87 | 988 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 989 | if (rc) |
a6ca1094 | 990 | __skb_queue_purge(&head); |
e2dafe87 | 991 | } while (!rc); |
0c3141e9 AS |
992 | exit: |
993 | if (iocb) | |
994 | release_sock(sk); | |
e2dafe87 JPM |
995 | |
996 | return rc; | |
b97bf3fd PL |
997 | } |
998 | ||
391a6dd1 YX |
999 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
1000 | { | |
1001 | struct sock *sk = sock->sk; | |
58ed9442 | 1002 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
1003 | DEFINE_WAIT(wait); |
1004 | int done; | |
1005 | ||
1006 | do { | |
1007 | int err = sock_error(sk); | |
1008 | if (err) | |
1009 | return err; | |
1010 | if (sock->state == SS_DISCONNECTING) | |
1011 | return -EPIPE; | |
1012 | else if (sock->state != SS_CONNECTED) | |
1013 | return -ENOTCONN; | |
1014 | if (!*timeo_p) | |
1015 | return -EAGAIN; | |
1016 | if (signal_pending(current)) | |
1017 | return sock_intr_errno(*timeo_p); | |
1018 | ||
1019 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1020 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 1021 | (!tsk->link_cong && |
301bae56 JPM |
1022 | !tsk_conn_cong(tsk)) || |
1023 | !tsk->connected); | |
391a6dd1 YX |
1024 | finish_wait(sk_sleep(sk), &wait); |
1025 | } while (!done); | |
1026 | return 0; | |
1027 | } | |
1028 | ||
c4307285 | 1029 | /** |
4ccfe5e0 JPM |
1030 | * tipc_send_stream - send stream-oriented data |
1031 | * @iocb: (unused) | |
b97bf3fd | 1032 | * @sock: socket structure |
4ccfe5e0 JPM |
1033 | * @m: data to send |
1034 | * @dsz: total length of data to be transmitted | |
c4307285 | 1035 | * |
4ccfe5e0 | 1036 | * Used for SOCK_STREAM data. |
c4307285 | 1037 | * |
4ccfe5e0 JPM |
1038 | * Returns the number of bytes sent on success (or partial success), |
1039 | * or errno if no data sent | |
b97bf3fd | 1040 | */ |
4ccfe5e0 JPM |
1041 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
1042 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1043 | { |
0c3141e9 | 1044 | struct sock *sk = sock->sk; |
f2f9800d | 1045 | struct net *net = sock_net(sk); |
58ed9442 | 1046 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1047 | struct tipc_msg *mhdr = &tsk->phdr; |
a6ca1094 | 1048 | struct sk_buff_head head; |
342dfc30 | 1049 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1050 | u32 portid = tsk->portid; |
4ccfe5e0 | 1051 | int rc = -EINVAL; |
391a6dd1 | 1052 | long timeo; |
4ccfe5e0 JPM |
1053 | u32 dnode; |
1054 | uint mtu, send, sent = 0; | |
b97bf3fd PL |
1055 | |
1056 | /* Handle implied connection establishment */ | |
4ccfe5e0 JPM |
1057 | if (unlikely(dest)) { |
1058 | rc = tipc_sendmsg(iocb, sock, m, dsz); | |
1059 | if (dsz && (dsz == rc)) | |
60120526 | 1060 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1061 | return rc; |
1062 | } | |
1063 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1064 | return -EMSGSIZE; |
1065 | ||
0c3141e9 AS |
1066 | if (iocb) |
1067 | lock_sock(sk); | |
b97bf3fd | 1068 | |
391a6dd1 YX |
1069 | if (unlikely(sock->state != SS_CONNECTED)) { |
1070 | if (sock->state == SS_DISCONNECTING) | |
4ccfe5e0 | 1071 | rc = -EPIPE; |
391a6dd1 | 1072 | else |
4ccfe5e0 | 1073 | rc = -ENOTCONN; |
391a6dd1 YX |
1074 | goto exit; |
1075 | } | |
1d835874 | 1076 | |
391a6dd1 | 1077 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1078 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1079 | |
1080 | next: | |
301bae56 | 1081 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1082 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
a6ca1094 | 1083 | __skb_queue_head_init(&head); |
34747539 | 1084 | rc = tipc_msg_build(net, mhdr, m, sent, send, mtu, &head); |
4ccfe5e0 JPM |
1085 | if (unlikely(rc < 0)) |
1086 | goto exit; | |
c4307285 | 1087 | do { |
301bae56 | 1088 | if (likely(!tsk_conn_cong(tsk))) { |
f2f9800d | 1089 | rc = tipc_link_xmit(net, &head, dnode, portid); |
4ccfe5e0 | 1090 | if (likely(!rc)) { |
60120526 | 1091 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1092 | sent += send; |
1093 | if (sent == dsz) | |
1094 | break; | |
1095 | goto next; | |
1096 | } | |
1097 | if (rc == -EMSGSIZE) { | |
f2f9800d YX |
1098 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1099 | portid); | |
4ccfe5e0 JPM |
1100 | goto next; |
1101 | } | |
1102 | if (rc != -ELINKCONG) | |
1103 | break; | |
50100a5e | 1104 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1105 | } |
1106 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1107 | if (rc) |
a6ca1094 | 1108 | __skb_queue_purge(&head); |
4ccfe5e0 | 1109 | } while (!rc); |
391a6dd1 | 1110 | exit: |
0c3141e9 AS |
1111 | if (iocb) |
1112 | release_sock(sk); | |
4ccfe5e0 | 1113 | return sent ? sent : rc; |
b97bf3fd PL |
1114 | } |
1115 | ||
c4307285 | 1116 | /** |
4ccfe5e0 JPM |
1117 | * tipc_send_packet - send a connection-oriented message |
1118 | * @iocb: if NULL, indicates that socket lock is already held | |
b97bf3fd | 1119 | * @sock: socket structure |
4ccfe5e0 JPM |
1120 | * @m: message to send |
1121 | * @dsz: length of data to be transmitted | |
c4307285 | 1122 | * |
4ccfe5e0 | 1123 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1124 | * |
4ccfe5e0 | 1125 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1126 | */ |
4ccfe5e0 JPM |
1127 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
1128 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1129 | { |
4ccfe5e0 JPM |
1130 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1131 | return -EMSGSIZE; | |
b97bf3fd | 1132 | |
4ccfe5e0 | 1133 | return tipc_send_stream(iocb, sock, m, dsz); |
b97bf3fd PL |
1134 | } |
1135 | ||
dadebc00 | 1136 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1137 | */ |
301bae56 | 1138 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1139 | u32 peer_node) |
b97bf3fd | 1140 | { |
3721e9c7 YX |
1141 | struct sock *sk = &tsk->sk; |
1142 | struct net *net = sock_net(sk); | |
301bae56 | 1143 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1144 | |
dadebc00 JPM |
1145 | msg_set_destnode(msg, peer_node); |
1146 | msg_set_destport(msg, peer_port); | |
1147 | msg_set_type(msg, TIPC_CONN_MSG); | |
1148 | msg_set_lookup_scope(msg, 0); | |
1149 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1150 | |
2f55c437 | 1151 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1152 | tsk->probing_state = TIPC_CONN_OK; |
1153 | tsk->connected = 1; | |
3721e9c7 | 1154 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1155 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1156 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1157 | } |
1158 | ||
1159 | /** | |
1160 | * set_orig_addr - capture sender's address for received message | |
1161 | * @m: descriptor for message info | |
1162 | * @msg: received message header | |
c4307285 | 1163 | * |
b97bf3fd PL |
1164 | * Note: Address is not captured if not requested by receiver. |
1165 | */ | |
05790c64 | 1166 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1167 | { |
342dfc30 | 1168 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1169 | |
c4307285 | 1170 | if (addr) { |
b97bf3fd PL |
1171 | addr->family = AF_TIPC; |
1172 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1173 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1174 | addr->addr.id.ref = msg_origport(msg); |
1175 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1176 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1177 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1178 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1179 | } | |
1180 | } | |
1181 | ||
1182 | /** | |
301bae56 | 1183 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1184 | * @m: descriptor for message info |
1185 | * @msg: received message header | |
301bae56 | 1186 | * @tsk: TIPC port associated with message |
c4307285 | 1187 | * |
b97bf3fd | 1188 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1189 | * |
b97bf3fd PL |
1190 | * Returns 0 if successful, otherwise errno |
1191 | */ | |
301bae56 JPM |
1192 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1193 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1194 | { |
1195 | u32 anc_data[3]; | |
1196 | u32 err; | |
1197 | u32 dest_type; | |
3546c750 | 1198 | int has_name; |
b97bf3fd PL |
1199 | int res; |
1200 | ||
1201 | if (likely(m->msg_controllen == 0)) | |
1202 | return 0; | |
1203 | ||
1204 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1205 | err = msg ? msg_errcode(msg) : 0; |
1206 | if (unlikely(err)) { | |
1207 | anc_data[0] = err; | |
1208 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1209 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1210 | if (res) | |
b97bf3fd | 1211 | return res; |
2db9983a AS |
1212 | if (anc_data[1]) { |
1213 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1214 | msg_data(msg)); | |
1215 | if (res) | |
1216 | return res; | |
1217 | } | |
b97bf3fd PL |
1218 | } |
1219 | ||
1220 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1221 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1222 | switch (dest_type) { | |
1223 | case TIPC_NAMED_MSG: | |
3546c750 | 1224 | has_name = 1; |
b97bf3fd PL |
1225 | anc_data[0] = msg_nametype(msg); |
1226 | anc_data[1] = msg_namelower(msg); | |
1227 | anc_data[2] = msg_namelower(msg); | |
1228 | break; | |
1229 | case TIPC_MCAST_MSG: | |
3546c750 | 1230 | has_name = 1; |
b97bf3fd PL |
1231 | anc_data[0] = msg_nametype(msg); |
1232 | anc_data[1] = msg_namelower(msg); | |
1233 | anc_data[2] = msg_nameupper(msg); | |
1234 | break; | |
1235 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1236 | has_name = (tsk->conn_type != 0); |
1237 | anc_data[0] = tsk->conn_type; | |
1238 | anc_data[1] = tsk->conn_instance; | |
1239 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1240 | break; |
1241 | default: | |
3546c750 | 1242 | has_name = 0; |
b97bf3fd | 1243 | } |
2db9983a AS |
1244 | if (has_name) { |
1245 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1246 | if (res) | |
1247 | return res; | |
1248 | } | |
b97bf3fd PL |
1249 | |
1250 | return 0; | |
1251 | } | |
1252 | ||
301bae56 | 1253 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1254 | { |
f2f9800d | 1255 | struct net *net = sock_net(&tsk->sk); |
34747539 | 1256 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
a6ca1094 | 1257 | struct sk_buff *skb = NULL; |
739f5e4e | 1258 | struct tipc_msg *msg; |
301bae56 JPM |
1259 | u32 peer_port = tsk_peer_port(tsk); |
1260 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1261 | |
301bae56 | 1262 | if (!tsk->connected) |
739f5e4e | 1263 | return; |
34747539 YX |
1264 | skb = tipc_msg_create(net, CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1265 | dnode, tn->own_addr, peer_port, tsk->portid, | |
1266 | TIPC_OK); | |
a6ca1094 | 1267 | if (!skb) |
739f5e4e | 1268 | return; |
a6ca1094 | 1269 | msg = buf_msg(skb); |
739f5e4e | 1270 | msg_set_msgcnt(msg, ack); |
f2f9800d | 1271 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1272 | } |
1273 | ||
85d3fc94 | 1274 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1275 | { |
1276 | struct sock *sk = sock->sk; | |
1277 | DEFINE_WAIT(wait); | |
85d3fc94 | 1278 | long timeo = *timeop; |
9bbb4ecc YX |
1279 | int err; |
1280 | ||
1281 | for (;;) { | |
1282 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1283 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1284 | if (sock->state == SS_DISCONNECTING) { |
1285 | err = -ENOTCONN; | |
1286 | break; | |
1287 | } | |
1288 | release_sock(sk); | |
1289 | timeo = schedule_timeout(timeo); | |
1290 | lock_sock(sk); | |
1291 | } | |
1292 | err = 0; | |
1293 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1294 | break; | |
1295 | err = sock_intr_errno(timeo); | |
1296 | if (signal_pending(current)) | |
1297 | break; | |
1298 | err = -EAGAIN; | |
1299 | if (!timeo) | |
1300 | break; | |
1301 | } | |
1302 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1303 | *timeop = timeo; |
9bbb4ecc YX |
1304 | return err; |
1305 | } | |
1306 | ||
c4307285 | 1307 | /** |
247f0f3c | 1308 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1309 | * @iocb: (unused) |
1310 | * @m: descriptor for message info | |
1311 | * @buf_len: total size of user buffer area | |
1312 | * @flags: receive flags | |
c4307285 | 1313 | * |
b97bf3fd PL |
1314 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1315 | * If the complete message doesn't fit in user area, truncate it. | |
1316 | * | |
1317 | * Returns size of returned message data, errno otherwise | |
1318 | */ | |
247f0f3c YX |
1319 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1320 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1321 | { |
0c3141e9 | 1322 | struct sock *sk = sock->sk; |
58ed9442 | 1323 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1324 | struct sk_buff *buf; |
1325 | struct tipc_msg *msg; | |
9bbb4ecc | 1326 | long timeo; |
b97bf3fd PL |
1327 | unsigned int sz; |
1328 | u32 err; | |
1329 | int res; | |
1330 | ||
0c3141e9 | 1331 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1332 | if (unlikely(!buf_len)) |
1333 | return -EINVAL; | |
1334 | ||
0c3141e9 | 1335 | lock_sock(sk); |
b97bf3fd | 1336 | |
0c3141e9 AS |
1337 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1338 | res = -ENOTCONN; | |
b97bf3fd PL |
1339 | goto exit; |
1340 | } | |
1341 | ||
9bbb4ecc | 1342 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1343 | restart: |
b97bf3fd | 1344 | |
0c3141e9 | 1345 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1346 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1347 | if (res) |
1348 | goto exit; | |
b97bf3fd | 1349 | |
0c3141e9 | 1350 | /* Look at first message in receive queue */ |
0c3141e9 | 1351 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1352 | msg = buf_msg(buf); |
1353 | sz = msg_data_sz(msg); | |
1354 | err = msg_errcode(msg); | |
1355 | ||
b97bf3fd | 1356 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1357 | if ((!sz) && (!err)) { |
2e84c60b | 1358 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1359 | goto restart; |
1360 | } | |
1361 | ||
1362 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1363 | set_orig_addr(m, msg); |
1364 | ||
1365 | /* Capture ancillary data (optional) */ | |
301bae56 | 1366 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1367 | if (res) |
b97bf3fd PL |
1368 | goto exit; |
1369 | ||
1370 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1371 | if (!err) { |
1372 | if (unlikely(buf_len < sz)) { | |
1373 | sz = buf_len; | |
1374 | m->msg_flags |= MSG_TRUNC; | |
1375 | } | |
51f3d02b | 1376 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1377 | if (res) |
b97bf3fd | 1378 | goto exit; |
b97bf3fd PL |
1379 | res = sz; |
1380 | } else { | |
1381 | if ((sock->state == SS_READY) || | |
1382 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1383 | res = 0; | |
1384 | else | |
1385 | res = -ECONNRESET; | |
1386 | } | |
1387 | ||
1388 | /* Consume received message (optional) */ | |
b97bf3fd | 1389 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1390 | if ((sock->state != SS_READY) && |
60120526 | 1391 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1392 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1393 | tsk->rcv_unacked = 0; |
1394 | } | |
2e84c60b | 1395 | tsk_advance_rx_queue(sk); |
c4307285 | 1396 | } |
b97bf3fd | 1397 | exit: |
0c3141e9 | 1398 | release_sock(sk); |
b97bf3fd PL |
1399 | return res; |
1400 | } | |
1401 | ||
c4307285 | 1402 | /** |
247f0f3c | 1403 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1404 | * @iocb: (unused) |
1405 | * @m: descriptor for message info | |
1406 | * @buf_len: total size of user buffer area | |
1407 | * @flags: receive flags | |
c4307285 YH |
1408 | * |
1409 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1410 | * will optionally wait for more; never truncates data. |
1411 | * | |
1412 | * Returns size of returned message data, errno otherwise | |
1413 | */ | |
247f0f3c YX |
1414 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1415 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1416 | { |
0c3141e9 | 1417 | struct sock *sk = sock->sk; |
58ed9442 | 1418 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1419 | struct sk_buff *buf; |
1420 | struct tipc_msg *msg; | |
9bbb4ecc | 1421 | long timeo; |
b97bf3fd | 1422 | unsigned int sz; |
3720d40b | 1423 | int sz_to_copy, target, needed; |
b97bf3fd | 1424 | int sz_copied = 0; |
b97bf3fd | 1425 | u32 err; |
0c3141e9 | 1426 | int res = 0; |
b97bf3fd | 1427 | |
0c3141e9 | 1428 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1429 | if (unlikely(!buf_len)) |
1430 | return -EINVAL; | |
1431 | ||
0c3141e9 | 1432 | lock_sock(sk); |
b97bf3fd | 1433 | |
9bbb4ecc | 1434 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1435 | res = -ENOTCONN; |
b97bf3fd PL |
1436 | goto exit; |
1437 | } | |
1438 | ||
3720d40b | 1439 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1440 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1441 | |
617d3c7a | 1442 | restart: |
0c3141e9 | 1443 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1444 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1445 | if (res) |
1446 | goto exit; | |
b97bf3fd | 1447 | |
0c3141e9 | 1448 | /* Look at first message in receive queue */ |
0c3141e9 | 1449 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1450 | msg = buf_msg(buf); |
1451 | sz = msg_data_sz(msg); | |
1452 | err = msg_errcode(msg); | |
1453 | ||
1454 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1455 | if ((!sz) && (!err)) { |
2e84c60b | 1456 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1457 | goto restart; |
1458 | } | |
1459 | ||
1460 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1461 | if (sz_copied == 0) { |
1462 | set_orig_addr(m, msg); | |
301bae56 | 1463 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1464 | if (res) |
b97bf3fd PL |
1465 | goto exit; |
1466 | } | |
1467 | ||
1468 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1469 | if (!err) { |
0232fd0a | 1470 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1471 | |
0232fd0a | 1472 | sz -= offset; |
b97bf3fd PL |
1473 | needed = (buf_len - sz_copied); |
1474 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1475 | |
51f3d02b DM |
1476 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1477 | m, sz_to_copy); | |
0232fd0a | 1478 | if (res) |
b97bf3fd | 1479 | goto exit; |
0232fd0a | 1480 | |
b97bf3fd PL |
1481 | sz_copied += sz_to_copy; |
1482 | ||
1483 | if (sz_to_copy < sz) { | |
1484 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1485 | TIPC_SKB_CB(buf)->handle = |
1486 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1487 | goto exit; |
1488 | } | |
b97bf3fd PL |
1489 | } else { |
1490 | if (sz_copied != 0) | |
1491 | goto exit; /* can't add error msg to valid data */ | |
1492 | ||
1493 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1494 | res = 0; | |
1495 | else | |
1496 | res = -ECONNRESET; | |
1497 | } | |
1498 | ||
1499 | /* Consume received message (optional) */ | |
b97bf3fd | 1500 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1501 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1502 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1503 | tsk->rcv_unacked = 0; |
1504 | } | |
2e84c60b | 1505 | tsk_advance_rx_queue(sk); |
c4307285 | 1506 | } |
b97bf3fd PL |
1507 | |
1508 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1509 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1510 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1511 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1512 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1513 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1514 | goto restart; |
1515 | ||
1516 | exit: | |
0c3141e9 | 1517 | release_sock(sk); |
a3b0a5a9 | 1518 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1519 | } |
1520 | ||
f288bef4 YX |
1521 | /** |
1522 | * tipc_write_space - wake up thread if port congestion is released | |
1523 | * @sk: socket | |
1524 | */ | |
1525 | static void tipc_write_space(struct sock *sk) | |
1526 | { | |
1527 | struct socket_wq *wq; | |
1528 | ||
1529 | rcu_read_lock(); | |
1530 | wq = rcu_dereference(sk->sk_wq); | |
1531 | if (wq_has_sleeper(wq)) | |
1532 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1533 | POLLWRNORM | POLLWRBAND); | |
1534 | rcu_read_unlock(); | |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1539 | * @sk: socket | |
1540 | * @len: the length of messages | |
1541 | */ | |
676d2369 | 1542 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1543 | { |
1544 | struct socket_wq *wq; | |
1545 | ||
1546 | rcu_read_lock(); | |
1547 | wq = rcu_dereference(sk->sk_wq); | |
1548 | if (wq_has_sleeper(wq)) | |
1549 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1550 | POLLRDNORM | POLLRDBAND); | |
1551 | rcu_read_unlock(); | |
1552 | } | |
1553 | ||
7e6c131e YX |
1554 | /** |
1555 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1556 | * @tsk: TIPC socket |
7e6c131e YX |
1557 | * @msg: message |
1558 | * | |
b2ad5e5f | 1559 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1560 | */ |
e4de5fab | 1561 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
7e6c131e | 1562 | { |
58ed9442 | 1563 | struct sock *sk = &tsk->sk; |
f2f9800d | 1564 | struct net *net = sock_net(sk); |
8826cde6 | 1565 | struct socket *sock = sk->sk_socket; |
7e6c131e | 1566 | struct tipc_msg *msg = buf_msg(*buf); |
e4de5fab | 1567 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1568 | |
1569 | if (msg_mcast(msg)) | |
1570 | return retval; | |
1571 | ||
1572 | switch ((int)sock->state) { | |
1573 | case SS_CONNECTED: | |
1574 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1575 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1576 | if (unlikely(msg_errcode(msg))) { |
1577 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1578 | tsk->connected = 0; |
dadebc00 | 1579 | /* let timer expire on it's own */ |
f2f9800d | 1580 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
07f6c4bc | 1581 | tsk->portid); |
7e6c131e YX |
1582 | } |
1583 | retval = TIPC_OK; | |
1584 | } | |
1585 | break; | |
1586 | case SS_CONNECTING: | |
1587 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1588 | |
1589 | if (unlikely(!msg_connected(msg))) | |
1590 | break; | |
1591 | ||
584d24b3 YX |
1592 | if (unlikely(msg_errcode(msg))) { |
1593 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1594 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1595 | retval = TIPC_OK; |
1596 | break; | |
1597 | } | |
1598 | ||
dadebc00 | 1599 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1600 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1601 | sk->sk_err = EINVAL; |
7e6c131e | 1602 | retval = TIPC_OK; |
584d24b3 YX |
1603 | break; |
1604 | } | |
1605 | ||
301bae56 JPM |
1606 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1607 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1608 | sock->state = SS_CONNECTED; |
1609 | ||
584d24b3 YX |
1610 | /* If an incoming message is an 'ACK-', it should be |
1611 | * discarded here because it doesn't contain useful | |
1612 | * data. In addition, we should try to wake up | |
1613 | * connect() routine if sleeping. | |
1614 | */ | |
1615 | if (msg_data_sz(msg) == 0) { | |
1616 | kfree_skb(*buf); | |
1617 | *buf = NULL; | |
1618 | if (waitqueue_active(sk_sleep(sk))) | |
1619 | wake_up_interruptible(sk_sleep(sk)); | |
1620 | } | |
1621 | retval = TIPC_OK; | |
7e6c131e YX |
1622 | break; |
1623 | case SS_LISTENING: | |
1624 | case SS_UNCONNECTED: | |
1625 | /* Accept only SYN message */ | |
1626 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1627 | retval = TIPC_OK; | |
1628 | break; | |
1629 | case SS_DISCONNECTING: | |
1630 | break; | |
1631 | default: | |
1632 | pr_err("Unknown socket state %u\n", sock->state); | |
1633 | } | |
1634 | return retval; | |
1635 | } | |
1636 | ||
aba79f33 YX |
1637 | /** |
1638 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1639 | * @sk: socket | |
1640 | * @buf: message | |
1641 | * | |
1642 | * For all connection oriented messages, irrespective of importance, | |
1643 | * the default overload value (i.e. 67MB) is set as limit. | |
1644 | * | |
1645 | * For all connectionless messages, by default new queue limits are | |
1646 | * as belows: | |
1647 | * | |
cc79dd1b YX |
1648 | * TIPC_LOW_IMPORTANCE (4 MB) |
1649 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1650 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1651 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1652 | * |
1653 | * Returns overload limit according to corresponding message importance | |
1654 | */ | |
1655 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1656 | { | |
1657 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1658 | |
1659 | if (msg_connected(msg)) | |
0cee6bbe | 1660 | return sysctl_tipc_rmem[2]; |
1661 | ||
1662 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1663 | msg_importance(msg); | |
aba79f33 YX |
1664 | } |
1665 | ||
c4307285 | 1666 | /** |
0c3141e9 AS |
1667 | * filter_rcv - validate incoming message |
1668 | * @sk: socket | |
b97bf3fd | 1669 | * @buf: message |
c4307285 | 1670 | * |
0c3141e9 AS |
1671 | * Enqueues message on receive queue if acceptable; optionally handles |
1672 | * disconnect indication for a connected socket. | |
1673 | * | |
1674 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1675 | * |
e4de5fab | 1676 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
ac0074ee | 1677 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
b97bf3fd | 1678 | */ |
e4de5fab | 1679 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1680 | { |
0c3141e9 | 1681 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1682 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd | 1683 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1684 | unsigned int limit = rcvbuf_limit(sk, buf); |
ac0074ee | 1685 | u32 onode; |
e4de5fab | 1686 | int rc = TIPC_OK; |
b97bf3fd | 1687 | |
ac0074ee JPM |
1688 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
1689 | return tipc_sk_proto_rcv(tsk, &onode, buf); | |
ec8a2e56 | 1690 | |
50100a5e JPM |
1691 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1692 | kfree_skb(buf); | |
1693 | tsk->link_cong = 0; | |
1694 | sk->sk_write_space(sk); | |
1695 | return TIPC_OK; | |
1696 | } | |
1697 | ||
b97bf3fd | 1698 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1699 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1700 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1701 | |
b97bf3fd | 1702 | if (sock->state == SS_READY) { |
b29f1428 | 1703 | if (msg_connected(msg)) |
e4de5fab | 1704 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1705 | } else { |
e4de5fab JPM |
1706 | rc = filter_connect(tsk, &buf); |
1707 | if (rc != TIPC_OK || buf == NULL) | |
1708 | return rc; | |
b97bf3fd PL |
1709 | } |
1710 | ||
1711 | /* Reject message if there isn't room to queue it */ | |
aba79f33 | 1712 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
e4de5fab | 1713 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1714 | |
aba79f33 | 1715 | /* Enqueue message */ |
40682432 | 1716 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1717 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1718 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1719 | |
676d2369 | 1720 | sk->sk_data_ready(sk); |
0c3141e9 AS |
1721 | return TIPC_OK; |
1722 | } | |
b97bf3fd | 1723 | |
0c3141e9 | 1724 | /** |
4f4482dc | 1725 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1726 | * @sk: socket |
a6ca1094 | 1727 | * @skb: message |
0c3141e9 AS |
1728 | * |
1729 | * Caller must hold socket lock, but not port lock. | |
1730 | * | |
1731 | * Returns 0 | |
1732 | */ | |
a6ca1094 | 1733 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1734 | { |
e4de5fab | 1735 | int rc; |
8db1bae3 | 1736 | u32 onode; |
4f4482dc | 1737 | struct tipc_sock *tsk = tipc_sk(sk); |
34747539 | 1738 | struct net *net = sock_net(sk); |
a6ca1094 | 1739 | uint truesize = skb->truesize; |
0c3141e9 | 1740 | |
a6ca1094 | 1741 | rc = filter_rcv(sk, skb); |
4f4482dc | 1742 | |
ac0074ee JPM |
1743 | if (likely(!rc)) { |
1744 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1745 | atomic_add(truesize, &tsk->dupl_rcvcnt); | |
1746 | return 0; | |
1747 | } | |
1748 | ||
34747539 | 1749 | if ((rc < 0) && !tipc_msg_reverse(net, skb, &onode, -rc)) |
ac0074ee JPM |
1750 | return 0; |
1751 | ||
34747539 | 1752 | tipc_link_xmit_skb(net, skb, onode, 0); |
4f4482dc | 1753 | |
0c3141e9 AS |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | /** | |
24be34b5 | 1758 | * tipc_sk_rcv - handle incoming message |
a6ca1094 | 1759 | * @skb: buffer containing arriving message |
9816f061 JPM |
1760 | * Consumes buffer |
1761 | * Returns 0 if success, or errno: -EHOSTUNREACH | |
0c3141e9 | 1762 | */ |
f2f9800d | 1763 | int tipc_sk_rcv(struct net *net, struct sk_buff *skb) |
0c3141e9 | 1764 | { |
9816f061 | 1765 | struct tipc_sock *tsk; |
9816f061 | 1766 | struct sock *sk; |
a6ca1094 | 1767 | u32 dport = msg_destport(buf_msg(skb)); |
e4de5fab | 1768 | int rc = TIPC_OK; |
4f4482dc | 1769 | uint limit; |
8db1bae3 | 1770 | u32 dnode; |
9816f061 | 1771 | |
5a379074 | 1772 | /* Validate destination and message */ |
e05b31f4 | 1773 | tsk = tipc_sk_lookup(net, dport); |
9b50fd08 | 1774 | if (unlikely(!tsk)) { |
4ac1c8d0 | 1775 | rc = tipc_msg_eval(net, skb, &dnode); |
9816f061 JPM |
1776 | goto exit; |
1777 | } | |
9816f061 JPM |
1778 | sk = &tsk->sk; |
1779 | ||
1780 | /* Queue message */ | |
1a194c2d | 1781 | spin_lock_bh(&sk->sk_lock.slock); |
9816f061 | 1782 | |
0c3141e9 | 1783 | if (!sock_owned_by_user(sk)) { |
a6ca1094 | 1784 | rc = filter_rcv(sk, skb); |
0c3141e9 | 1785 | } else { |
4f4482dc JPM |
1786 | if (sk->sk_backlog.len == 0) |
1787 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
a6ca1094 YX |
1788 | limit = rcvbuf_limit(sk, skb) + atomic_read(&tsk->dupl_rcvcnt); |
1789 | if (sk_add_backlog(sk, skb, limit)) | |
e4de5fab | 1790 | rc = -TIPC_ERR_OVERLOAD; |
0c3141e9 | 1791 | } |
1a194c2d | 1792 | spin_unlock_bh(&sk->sk_lock.slock); |
07f6c4bc | 1793 | sock_put(sk); |
e4de5fab | 1794 | if (likely(!rc)) |
9816f061 JPM |
1795 | return 0; |
1796 | exit: | |
34747539 | 1797 | if ((rc < 0) && !tipc_msg_reverse(net, skb, &dnode, -rc)) |
8db1bae3 | 1798 | return -EHOSTUNREACH; |
5a379074 | 1799 | |
f2f9800d | 1800 | tipc_link_xmit_skb(net, skb, dnode, 0); |
5a379074 | 1801 | return (rc < 0) ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1802 | } |
1803 | ||
78eb3a53 YX |
1804 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1805 | { | |
1806 | struct sock *sk = sock->sk; | |
1807 | DEFINE_WAIT(wait); | |
1808 | int done; | |
1809 | ||
1810 | do { | |
1811 | int err = sock_error(sk); | |
1812 | if (err) | |
1813 | return err; | |
1814 | if (!*timeo_p) | |
1815 | return -ETIMEDOUT; | |
1816 | if (signal_pending(current)) | |
1817 | return sock_intr_errno(*timeo_p); | |
1818 | ||
1819 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1820 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1821 | finish_wait(sk_sleep(sk), &wait); | |
1822 | } while (!done); | |
1823 | return 0; | |
1824 | } | |
1825 | ||
b97bf3fd | 1826 | /** |
247f0f3c | 1827 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1828 | * @sock: socket structure |
1829 | * @dest: socket address for destination port | |
1830 | * @destlen: size of socket address data structure | |
0c3141e9 | 1831 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1832 | * |
1833 | * Returns 0 on success, errno otherwise | |
1834 | */ | |
247f0f3c YX |
1835 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1836 | int destlen, int flags) | |
b97bf3fd | 1837 | { |
0c3141e9 | 1838 | struct sock *sk = sock->sk; |
b89741a0 AS |
1839 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1840 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1841 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1842 | socket_state previous; | |
b89741a0 AS |
1843 | int res; |
1844 | ||
0c3141e9 AS |
1845 | lock_sock(sk); |
1846 | ||
b89741a0 | 1847 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1848 | if (sock->state == SS_READY) { |
1849 | res = -EOPNOTSUPP; | |
1850 | goto exit; | |
1851 | } | |
b89741a0 | 1852 | |
b89741a0 AS |
1853 | /* |
1854 | * Reject connection attempt using multicast address | |
1855 | * | |
1856 | * Note: send_msg() validates the rest of the address fields, | |
1857 | * so there's no need to do it here | |
1858 | */ | |
0c3141e9 AS |
1859 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1860 | res = -EINVAL; | |
1861 | goto exit; | |
1862 | } | |
1863 | ||
78eb3a53 | 1864 | previous = sock->state; |
584d24b3 YX |
1865 | switch (sock->state) { |
1866 | case SS_UNCONNECTED: | |
1867 | /* Send a 'SYN-' to destination */ | |
1868 | m.msg_name = dest; | |
1869 | m.msg_namelen = destlen; | |
1870 | ||
1871 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1872 | * indicate send_msg() is never blocked. | |
1873 | */ | |
1874 | if (!timeout) | |
1875 | m.msg_flags = MSG_DONTWAIT; | |
1876 | ||
247f0f3c | 1877 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1878 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1879 | goto exit; | |
1880 | ||
1881 | /* Just entered SS_CONNECTING state; the only | |
1882 | * difference is that return value in non-blocking | |
1883 | * case is EINPROGRESS, rather than EALREADY. | |
1884 | */ | |
1885 | res = -EINPROGRESS; | |
584d24b3 | 1886 | case SS_CONNECTING: |
78eb3a53 YX |
1887 | if (previous == SS_CONNECTING) |
1888 | res = -EALREADY; | |
1889 | if (!timeout) | |
1890 | goto exit; | |
1891 | timeout = msecs_to_jiffies(timeout); | |
1892 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1893 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1894 | break; |
1895 | case SS_CONNECTED: | |
1896 | res = -EISCONN; | |
1897 | break; | |
1898 | default: | |
1899 | res = -EINVAL; | |
78eb3a53 | 1900 | break; |
b89741a0 | 1901 | } |
0c3141e9 AS |
1902 | exit: |
1903 | release_sock(sk); | |
b89741a0 | 1904 | return res; |
b97bf3fd PL |
1905 | } |
1906 | ||
c4307285 | 1907 | /** |
247f0f3c | 1908 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1909 | * @sock: socket structure |
1910 | * @len: (unused) | |
c4307285 | 1911 | * |
b97bf3fd PL |
1912 | * Returns 0 on success, errno otherwise |
1913 | */ | |
247f0f3c | 1914 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1915 | { |
0c3141e9 AS |
1916 | struct sock *sk = sock->sk; |
1917 | int res; | |
1918 | ||
1919 | lock_sock(sk); | |
b97bf3fd | 1920 | |
245f3d34 | 1921 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1922 | res = -EINVAL; |
1923 | else { | |
1924 | sock->state = SS_LISTENING; | |
1925 | res = 0; | |
1926 | } | |
1927 | ||
1928 | release_sock(sk); | |
1929 | return res; | |
b97bf3fd PL |
1930 | } |
1931 | ||
6398e23c YX |
1932 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1933 | { | |
1934 | struct sock *sk = sock->sk; | |
1935 | DEFINE_WAIT(wait); | |
1936 | int err; | |
1937 | ||
1938 | /* True wake-one mechanism for incoming connections: only | |
1939 | * one process gets woken up, not the 'whole herd'. | |
1940 | * Since we do not 'race & poll' for established sockets | |
1941 | * anymore, the common case will execute the loop only once. | |
1942 | */ | |
1943 | for (;;) { | |
1944 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1945 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1946 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1947 | release_sock(sk); |
1948 | timeo = schedule_timeout(timeo); | |
1949 | lock_sock(sk); | |
1950 | } | |
1951 | err = 0; | |
1952 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1953 | break; | |
1954 | err = -EINVAL; | |
1955 | if (sock->state != SS_LISTENING) | |
1956 | break; | |
1957 | err = sock_intr_errno(timeo); | |
1958 | if (signal_pending(current)) | |
1959 | break; | |
1960 | err = -EAGAIN; | |
1961 | if (!timeo) | |
1962 | break; | |
1963 | } | |
1964 | finish_wait(sk_sleep(sk), &wait); | |
1965 | return err; | |
1966 | } | |
1967 | ||
c4307285 | 1968 | /** |
247f0f3c | 1969 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1970 | * @sock: listening socket |
1971 | * @newsock: new socket that is to be connected | |
1972 | * @flags: file-related flags associated with socket | |
c4307285 | 1973 | * |
b97bf3fd PL |
1974 | * Returns 0 on success, errno otherwise |
1975 | */ | |
247f0f3c | 1976 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1977 | { |
0fef8f20 | 1978 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1979 | struct sk_buff *buf; |
301bae56 | 1980 | struct tipc_sock *new_tsock; |
0fef8f20 | 1981 | struct tipc_msg *msg; |
6398e23c | 1982 | long timeo; |
0c3141e9 | 1983 | int res; |
b97bf3fd | 1984 | |
0c3141e9 | 1985 | lock_sock(sk); |
b97bf3fd | 1986 | |
0c3141e9 AS |
1987 | if (sock->state != SS_LISTENING) { |
1988 | res = -EINVAL; | |
b97bf3fd PL |
1989 | goto exit; |
1990 | } | |
6398e23c YX |
1991 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1992 | res = tipc_wait_for_accept(sock, timeo); | |
1993 | if (res) | |
1994 | goto exit; | |
0c3141e9 AS |
1995 | |
1996 | buf = skb_peek(&sk->sk_receive_queue); | |
1997 | ||
c5fa7b3c | 1998 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1999 | if (res) |
2000 | goto exit; | |
b97bf3fd | 2001 | |
0fef8f20 | 2002 | new_sk = new_sock->sk; |
301bae56 | 2003 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2004 | msg = buf_msg(buf); |
b97bf3fd | 2005 | |
0fef8f20 PG |
2006 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2007 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2008 | ||
2009 | /* | |
2010 | * Reject any stray messages received by new socket | |
2011 | * before the socket lock was taken (very, very unlikely) | |
2012 | */ | |
2e84c60b | 2013 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2014 | |
2015 | /* Connect new socket to it's peer */ | |
301bae56 | 2016 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2017 | new_sock->state = SS_CONNECTED; |
2018 | ||
301bae56 | 2019 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2020 | if (msg_named(msg)) { |
301bae56 JPM |
2021 | new_tsock->conn_type = msg_nametype(msg); |
2022 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2023 | } |
0fef8f20 PG |
2024 | |
2025 | /* | |
2026 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2027 | * Respond to 'SYN+' by queuing it on new socket. | |
2028 | */ | |
2029 | if (!msg_data_sz(msg)) { | |
2030 | struct msghdr m = {NULL,}; | |
2031 | ||
2e84c60b | 2032 | tsk_advance_rx_queue(sk); |
247f0f3c | 2033 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
2034 | } else { |
2035 | __skb_dequeue(&sk->sk_receive_queue); | |
2036 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2037 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2038 | } |
2039 | release_sock(new_sk); | |
b97bf3fd | 2040 | exit: |
0c3141e9 | 2041 | release_sock(sk); |
b97bf3fd PL |
2042 | return res; |
2043 | } | |
2044 | ||
2045 | /** | |
247f0f3c | 2046 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2047 | * @sock: socket structure |
e247a8f5 | 2048 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2049 | * |
2050 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2051 | * |
b97bf3fd PL |
2052 | * Returns 0 on success, errno otherwise |
2053 | */ | |
247f0f3c | 2054 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2055 | { |
0c3141e9 | 2056 | struct sock *sk = sock->sk; |
f2f9800d | 2057 | struct net *net = sock_net(sk); |
34747539 | 2058 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
58ed9442 | 2059 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2060 | struct sk_buff *skb; |
80e44c22 | 2061 | u32 dnode; |
b97bf3fd PL |
2062 | int res; |
2063 | ||
e247a8f5 AS |
2064 | if (how != SHUT_RDWR) |
2065 | return -EINVAL; | |
b97bf3fd | 2066 | |
0c3141e9 | 2067 | lock_sock(sk); |
b97bf3fd PL |
2068 | |
2069 | switch (sock->state) { | |
0c3141e9 | 2070 | case SS_CONNECTING: |
b97bf3fd PL |
2071 | case SS_CONNECTED: |
2072 | ||
b97bf3fd | 2073 | restart: |
617d3c7a | 2074 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2075 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2076 | if (skb) { | |
2077 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2078 | kfree_skb(skb); | |
b97bf3fd PL |
2079 | goto restart; |
2080 | } | |
34747539 YX |
2081 | if (tipc_msg_reverse(net, skb, &dnode, |
2082 | TIPC_CONN_SHUTDOWN)) | |
f2f9800d YX |
2083 | tipc_link_xmit_skb(net, skb, dnode, |
2084 | tsk->portid); | |
2085 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
0c3141e9 | 2086 | } else { |
301bae56 | 2087 | dnode = tsk_peer_node(tsk); |
34747539 | 2088 | skb = tipc_msg_create(net, TIPC_CRITICAL_IMPORTANCE, |
80e44c22 | 2089 | TIPC_CONN_MSG, SHORT_H_SIZE, |
34747539 | 2090 | 0, dnode, tn->own_addr, |
301bae56 | 2091 | tsk_peer_port(tsk), |
07f6c4bc | 2092 | tsk->portid, TIPC_CONN_SHUTDOWN); |
f2f9800d | 2093 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2094 | } |
301bae56 | 2095 | tsk->connected = 0; |
0c3141e9 | 2096 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2097 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2098 | /* fall through */ |
2099 | ||
2100 | case SS_DISCONNECTING: | |
2101 | ||
75031151 | 2102 | /* Discard any unreceived messages */ |
57467e56 | 2103 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2104 | |
2105 | /* Wake up anyone sleeping in poll */ | |
2106 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2107 | res = 0; |
2108 | break; | |
2109 | ||
2110 | default: | |
2111 | res = -ENOTCONN; | |
2112 | } | |
2113 | ||
0c3141e9 | 2114 | release_sock(sk); |
b97bf3fd PL |
2115 | return res; |
2116 | } | |
2117 | ||
f2f2a96a | 2118 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2119 | { |
f2f2a96a YX |
2120 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2121 | struct sock *sk = &tsk->sk; | |
34747539 YX |
2122 | struct net *net = sock_net(sk); |
2123 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
a6ca1094 | 2124 | struct sk_buff *skb = NULL; |
57289015 JPM |
2125 | u32 peer_port, peer_node; |
2126 | ||
6c9808ce | 2127 | bh_lock_sock(sk); |
301bae56 | 2128 | if (!tsk->connected) { |
6c9808ce JPM |
2129 | bh_unlock_sock(sk); |
2130 | goto exit; | |
57289015 | 2131 | } |
301bae56 JPM |
2132 | peer_port = tsk_peer_port(tsk); |
2133 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2134 | |
301bae56 | 2135 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
57289015 | 2136 | /* Previous probe not answered -> self abort */ |
34747539 YX |
2137 | skb = tipc_msg_create(net, TIPC_CRITICAL_IMPORTANCE, |
2138 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, | |
2139 | tn->own_addr, peer_node, tsk->portid, | |
2140 | peer_port, TIPC_ERR_NO_PORT); | |
57289015 | 2141 | } else { |
34747539 YX |
2142 | skb = tipc_msg_create(net, CONN_MANAGER, CONN_PROBE, INT_H_SIZE, |
2143 | 0, peer_node, tn->own_addr, | |
f2f2a96a | 2144 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2145 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2146 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2147 | } |
2148 | bh_unlock_sock(sk); | |
a6ca1094 | 2149 | if (skb) |
f2f9800d | 2150 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2151 | exit: |
07f6c4bc | 2152 | sock_put(sk); |
57289015 JPM |
2153 | } |
2154 | ||
301bae56 | 2155 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2156 | struct tipc_name_seq const *seq) |
2157 | { | |
f2f9800d | 2158 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2159 | struct publication *publ; |
2160 | u32 key; | |
2161 | ||
301bae56 | 2162 | if (tsk->connected) |
0fc87aae | 2163 | return -EINVAL; |
07f6c4bc YX |
2164 | key = tsk->portid + tsk->pub_count + 1; |
2165 | if (key == tsk->portid) | |
0fc87aae JPM |
2166 | return -EADDRINUSE; |
2167 | ||
f2f9800d | 2168 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2169 | scope, tsk->portid, key); |
0fc87aae JPM |
2170 | if (unlikely(!publ)) |
2171 | return -EINVAL; | |
2172 | ||
301bae56 JPM |
2173 | list_add(&publ->pport_list, &tsk->publications); |
2174 | tsk->pub_count++; | |
2175 | tsk->published = 1; | |
0fc87aae JPM |
2176 | return 0; |
2177 | } | |
2178 | ||
301bae56 | 2179 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2180 | struct tipc_name_seq const *seq) |
2181 | { | |
f2f9800d | 2182 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2183 | struct publication *publ; |
2184 | struct publication *safe; | |
2185 | int rc = -EINVAL; | |
2186 | ||
301bae56 | 2187 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2188 | if (seq) { |
2189 | if (publ->scope != scope) | |
2190 | continue; | |
2191 | if (publ->type != seq->type) | |
2192 | continue; | |
2193 | if (publ->lower != seq->lower) | |
2194 | continue; | |
2195 | if (publ->upper != seq->upper) | |
2196 | break; | |
f2f9800d | 2197 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2198 | publ->ref, publ->key); |
2199 | rc = 0; | |
2200 | break; | |
2201 | } | |
f2f9800d | 2202 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2203 | publ->ref, publ->key); |
2204 | rc = 0; | |
2205 | } | |
301bae56 JPM |
2206 | if (list_empty(&tsk->publications)) |
2207 | tsk->published = 0; | |
0fc87aae JPM |
2208 | return rc; |
2209 | } | |
2210 | ||
301bae56 | 2211 | static int tipc_sk_show(struct tipc_sock *tsk, char *buf, |
5a9ee0be JPM |
2212 | int len, int full_id) |
2213 | { | |
34747539 YX |
2214 | struct net *net = sock_net(&tsk->sk); |
2215 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
5a9ee0be JPM |
2216 | struct publication *publ; |
2217 | int ret; | |
2218 | ||
2219 | if (full_id) | |
2220 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", | |
34747539 YX |
2221 | tipc_zone(tn->own_addr), |
2222 | tipc_cluster(tn->own_addr), | |
2223 | tipc_node(tn->own_addr), tsk->portid); | |
5a9ee0be | 2224 | else |
07f6c4bc | 2225 | ret = tipc_snprintf(buf, len, "%-10u:", tsk->portid); |
5a9ee0be | 2226 | |
301bae56 JPM |
2227 | if (tsk->connected) { |
2228 | u32 dport = tsk_peer_port(tsk); | |
2229 | u32 destnode = tsk_peer_node(tsk); | |
5a9ee0be JPM |
2230 | |
2231 | ret += tipc_snprintf(buf + ret, len - ret, | |
2232 | " connected to <%u.%u.%u:%u>", | |
2233 | tipc_zone(destnode), | |
2234 | tipc_cluster(destnode), | |
2235 | tipc_node(destnode), dport); | |
301bae56 | 2236 | if (tsk->conn_type != 0) |
5a9ee0be | 2237 | ret += tipc_snprintf(buf + ret, len - ret, |
301bae56 JPM |
2238 | " via {%u,%u}", tsk->conn_type, |
2239 | tsk->conn_instance); | |
2240 | } else if (tsk->published) { | |
5a9ee0be | 2241 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
301bae56 | 2242 | list_for_each_entry(publ, &tsk->publications, pport_list) { |
5a9ee0be JPM |
2243 | if (publ->lower == publ->upper) |
2244 | ret += tipc_snprintf(buf + ret, len - ret, | |
2245 | " {%u,%u}", publ->type, | |
2246 | publ->lower); | |
2247 | else | |
2248 | ret += tipc_snprintf(buf + ret, len - ret, | |
2249 | " {%u,%u,%u}", publ->type, | |
2250 | publ->lower, publ->upper); | |
2251 | } | |
2252 | } | |
2253 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); | |
2254 | return ret; | |
2255 | } | |
2256 | ||
e05b31f4 | 2257 | struct sk_buff *tipc_sk_socks_show(struct net *net) |
5a9ee0be | 2258 | { |
e05b31f4 | 2259 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2260 | const struct bucket_table *tbl; |
2261 | struct rhash_head *pos; | |
5a9ee0be JPM |
2262 | struct sk_buff *buf; |
2263 | struct tlv_desc *rep_tlv; | |
2264 | char *pb; | |
2265 | int pb_len; | |
2266 | struct tipc_sock *tsk; | |
2267 | int str_len = 0; | |
07f6c4bc | 2268 | int i; |
5a9ee0be JPM |
2269 | |
2270 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); | |
2271 | if (!buf) | |
2272 | return NULL; | |
2273 | rep_tlv = (struct tlv_desc *)buf->data; | |
2274 | pb = TLV_DATA(rep_tlv); | |
2275 | pb_len = ULTRA_STRING_MAX_LEN; | |
2276 | ||
07f6c4bc | 2277 | rcu_read_lock(); |
e05b31f4 | 2278 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2279 | for (i = 0; i < tbl->size; i++) { |
2280 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2281 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2282 | str_len += tipc_sk_show(tsk, pb + str_len, | |
2283 | pb_len - str_len, 0); | |
2284 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2285 | } | |
5a9ee0be | 2286 | } |
07f6c4bc YX |
2287 | rcu_read_unlock(); |
2288 | ||
5a9ee0be JPM |
2289 | str_len += 1; /* for "\0" */ |
2290 | skb_put(buf, TLV_SPACE(str_len)); | |
2291 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
2292 | ||
2293 | return buf; | |
2294 | } | |
2295 | ||
2296 | /* tipc_sk_reinit: set non-zero address in all existing sockets | |
2297 | * when we go from standalone to network mode. | |
2298 | */ | |
e05b31f4 | 2299 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2300 | { |
e05b31f4 | 2301 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2302 | const struct bucket_table *tbl; |
2303 | struct rhash_head *pos; | |
2304 | struct tipc_sock *tsk; | |
5a9ee0be | 2305 | struct tipc_msg *msg; |
07f6c4bc | 2306 | int i; |
5a9ee0be | 2307 | |
07f6c4bc | 2308 | rcu_read_lock(); |
e05b31f4 | 2309 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2310 | for (i = 0; i < tbl->size; i++) { |
2311 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2312 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2313 | msg = &tsk->phdr; | |
34747539 YX |
2314 | msg_set_prevnode(msg, tn->own_addr); |
2315 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2316 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2317 | } | |
5a9ee0be | 2318 | } |
07f6c4bc | 2319 | rcu_read_unlock(); |
5a9ee0be JPM |
2320 | } |
2321 | ||
e05b31f4 | 2322 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2323 | { |
e05b31f4 | 2324 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2325 | struct tipc_sock *tsk; |
808d90f9 | 2326 | |
07f6c4bc | 2327 | rcu_read_lock(); |
e05b31f4 | 2328 | tsk = rhashtable_lookup(&tn->sk_rht, &portid); |
07f6c4bc YX |
2329 | if (tsk) |
2330 | sock_hold(&tsk->sk); | |
2331 | rcu_read_unlock(); | |
808d90f9 | 2332 | |
07f6c4bc | 2333 | return tsk; |
808d90f9 JPM |
2334 | } |
2335 | ||
07f6c4bc | 2336 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2337 | { |
e05b31f4 YX |
2338 | struct sock *sk = &tsk->sk; |
2339 | struct net *net = sock_net(sk); | |
2340 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2341 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2342 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2343 | |
07f6c4bc YX |
2344 | while (remaining--) { |
2345 | portid++; | |
2346 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2347 | portid = TIPC_MIN_PORT; | |
2348 | tsk->portid = portid; | |
2349 | sock_hold(&tsk->sk); | |
e05b31f4 | 2350 | if (rhashtable_lookup_insert(&tn->sk_rht, &tsk->node)) |
07f6c4bc YX |
2351 | return 0; |
2352 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2353 | } |
2354 | ||
07f6c4bc | 2355 | return -1; |
808d90f9 JPM |
2356 | } |
2357 | ||
07f6c4bc | 2358 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2359 | { |
07f6c4bc | 2360 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2361 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2362 | |
e05b31f4 | 2363 | if (rhashtable_remove(&tn->sk_rht, &tsk->node)) { |
07f6c4bc YX |
2364 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2365 | __sock_put(sk); | |
808d90f9 | 2366 | } |
808d90f9 JPM |
2367 | } |
2368 | ||
e05b31f4 | 2369 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2370 | { |
e05b31f4 | 2371 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2372 | struct rhashtable_params rht_params = { |
2373 | .nelem_hint = 192, | |
2374 | .head_offset = offsetof(struct tipc_sock, node), | |
2375 | .key_offset = offsetof(struct tipc_sock, portid), | |
2376 | .key_len = sizeof(u32), /* portid */ | |
2377 | .hashfn = jhash, | |
2378 | .max_shift = 20, /* 1M */ | |
2379 | .min_shift = 8, /* 256 */ | |
2380 | .grow_decision = rht_grow_above_75, | |
2381 | .shrink_decision = rht_shrink_below_30, | |
2382 | }; | |
808d90f9 | 2383 | |
e05b31f4 | 2384 | return rhashtable_init(&tn->sk_rht, &rht_params); |
808d90f9 JPM |
2385 | } |
2386 | ||
e05b31f4 | 2387 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2388 | { |
e05b31f4 YX |
2389 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2390 | ||
07f6c4bc YX |
2391 | /* Wait for socket readers to complete */ |
2392 | synchronize_net(); | |
808d90f9 | 2393 | |
e05b31f4 | 2394 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2395 | } |
2396 | ||
b97bf3fd | 2397 | /** |
247f0f3c | 2398 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2399 | * @sock: socket structure |
2400 | * @lvl: option level | |
2401 | * @opt: option identifier | |
2402 | * @ov: pointer to new option value | |
2403 | * @ol: length of option value | |
c4307285 YH |
2404 | * |
2405 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2406 | * (to ease compatibility). |
c4307285 | 2407 | * |
b97bf3fd PL |
2408 | * Returns 0 on success, errno otherwise |
2409 | */ | |
247f0f3c YX |
2410 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2411 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2412 | { |
0c3141e9 | 2413 | struct sock *sk = sock->sk; |
58ed9442 | 2414 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2415 | u32 value; |
2416 | int res; | |
2417 | ||
c4307285 YH |
2418 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2419 | return 0; | |
b97bf3fd PL |
2420 | if (lvl != SOL_TIPC) |
2421 | return -ENOPROTOOPT; | |
2422 | if (ol < sizeof(value)) | |
2423 | return -EINVAL; | |
2db9983a AS |
2424 | res = get_user(value, (u32 __user *)ov); |
2425 | if (res) | |
b97bf3fd PL |
2426 | return res; |
2427 | ||
0c3141e9 | 2428 | lock_sock(sk); |
c4307285 | 2429 | |
b97bf3fd PL |
2430 | switch (opt) { |
2431 | case TIPC_IMPORTANCE: | |
301bae56 | 2432 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2433 | break; |
2434 | case TIPC_SRC_DROPPABLE: | |
2435 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2436 | tsk_set_unreliable(tsk, value); |
c4307285 | 2437 | else |
b97bf3fd PL |
2438 | res = -ENOPROTOOPT; |
2439 | break; | |
2440 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2441 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2442 | break; |
2443 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2444 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2445 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2446 | break; |
2447 | default: | |
2448 | res = -EINVAL; | |
2449 | } | |
2450 | ||
0c3141e9 AS |
2451 | release_sock(sk); |
2452 | ||
b97bf3fd PL |
2453 | return res; |
2454 | } | |
2455 | ||
2456 | /** | |
247f0f3c | 2457 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2458 | * @sock: socket structure |
2459 | * @lvl: option level | |
2460 | * @opt: option identifier | |
2461 | * @ov: receptacle for option value | |
2462 | * @ol: receptacle for length of option value | |
c4307285 YH |
2463 | * |
2464 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2465 | * (to ease compatibility). |
c4307285 | 2466 | * |
b97bf3fd PL |
2467 | * Returns 0 on success, errno otherwise |
2468 | */ | |
247f0f3c YX |
2469 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2470 | char __user *ov, int __user *ol) | |
b97bf3fd | 2471 | { |
0c3141e9 | 2472 | struct sock *sk = sock->sk; |
58ed9442 | 2473 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2474 | int len; |
b97bf3fd | 2475 | u32 value; |
c4307285 | 2476 | int res; |
b97bf3fd | 2477 | |
c4307285 YH |
2478 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2479 | return put_user(0, ol); | |
b97bf3fd PL |
2480 | if (lvl != SOL_TIPC) |
2481 | return -ENOPROTOOPT; | |
2db9983a AS |
2482 | res = get_user(len, ol); |
2483 | if (res) | |
c4307285 | 2484 | return res; |
b97bf3fd | 2485 | |
0c3141e9 | 2486 | lock_sock(sk); |
b97bf3fd PL |
2487 | |
2488 | switch (opt) { | |
2489 | case TIPC_IMPORTANCE: | |
301bae56 | 2490 | value = tsk_importance(tsk); |
b97bf3fd PL |
2491 | break; |
2492 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2493 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2494 | break; |
2495 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2496 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2497 | break; |
2498 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2499 | value = tsk->conn_timeout; |
0c3141e9 | 2500 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2501 | break; |
0e65967e | 2502 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2503 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2504 | break; |
0e65967e | 2505 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2506 | value = skb_queue_len(&sk->sk_receive_queue); |
2507 | break; | |
b97bf3fd PL |
2508 | default: |
2509 | res = -EINVAL; | |
2510 | } | |
2511 | ||
0c3141e9 AS |
2512 | release_sock(sk); |
2513 | ||
25860c3b PG |
2514 | if (res) |
2515 | return res; /* "get" failed */ | |
b97bf3fd | 2516 | |
25860c3b PG |
2517 | if (len < sizeof(value)) |
2518 | return -EINVAL; | |
2519 | ||
2520 | if (copy_to_user(ov, &value, sizeof(value))) | |
2521 | return -EFAULT; | |
2522 | ||
2523 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2524 | } |
2525 | ||
f2f9800d | 2526 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2527 | { |
f2f9800d | 2528 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2529 | struct tipc_sioc_ln_req lnr; |
2530 | void __user *argp = (void __user *)arg; | |
2531 | ||
2532 | switch (cmd) { | |
2533 | case SIOCGETLINKNAME: | |
2534 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2535 | return -EFAULT; | |
f2f9800d YX |
2536 | if (!tipc_node_get_linkname(sock_net(sk), |
2537 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2538 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2539 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2540 | return -EFAULT; | |
2541 | return 0; | |
2542 | } | |
2543 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2544 | default: |
2545 | return -ENOIOCTLCMD; | |
2546 | } | |
2547 | } | |
2548 | ||
ae86b9e3 BH |
2549 | /* Protocol switches for the various types of TIPC sockets */ |
2550 | ||
bca65eae | 2551 | static const struct proto_ops msg_ops = { |
0e65967e | 2552 | .owner = THIS_MODULE, |
b97bf3fd | 2553 | .family = AF_TIPC, |
247f0f3c YX |
2554 | .release = tipc_release, |
2555 | .bind = tipc_bind, | |
2556 | .connect = tipc_connect, | |
5eee6a6d | 2557 | .socketpair = sock_no_socketpair, |
245f3d34 | 2558 | .accept = sock_no_accept, |
247f0f3c YX |
2559 | .getname = tipc_getname, |
2560 | .poll = tipc_poll, | |
78acb1f9 | 2561 | .ioctl = tipc_ioctl, |
245f3d34 | 2562 | .listen = sock_no_listen, |
247f0f3c YX |
2563 | .shutdown = tipc_shutdown, |
2564 | .setsockopt = tipc_setsockopt, | |
2565 | .getsockopt = tipc_getsockopt, | |
2566 | .sendmsg = tipc_sendmsg, | |
2567 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2568 | .mmap = sock_no_mmap, |
2569 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2570 | }; |
2571 | ||
bca65eae | 2572 | static const struct proto_ops packet_ops = { |
0e65967e | 2573 | .owner = THIS_MODULE, |
b97bf3fd | 2574 | .family = AF_TIPC, |
247f0f3c YX |
2575 | .release = tipc_release, |
2576 | .bind = tipc_bind, | |
2577 | .connect = tipc_connect, | |
5eee6a6d | 2578 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2579 | .accept = tipc_accept, |
2580 | .getname = tipc_getname, | |
2581 | .poll = tipc_poll, | |
78acb1f9 | 2582 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2583 | .listen = tipc_listen, |
2584 | .shutdown = tipc_shutdown, | |
2585 | .setsockopt = tipc_setsockopt, | |
2586 | .getsockopt = tipc_getsockopt, | |
2587 | .sendmsg = tipc_send_packet, | |
2588 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2589 | .mmap = sock_no_mmap, |
2590 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2591 | }; |
2592 | ||
bca65eae | 2593 | static const struct proto_ops stream_ops = { |
0e65967e | 2594 | .owner = THIS_MODULE, |
b97bf3fd | 2595 | .family = AF_TIPC, |
247f0f3c YX |
2596 | .release = tipc_release, |
2597 | .bind = tipc_bind, | |
2598 | .connect = tipc_connect, | |
5eee6a6d | 2599 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2600 | .accept = tipc_accept, |
2601 | .getname = tipc_getname, | |
2602 | .poll = tipc_poll, | |
78acb1f9 | 2603 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2604 | .listen = tipc_listen, |
2605 | .shutdown = tipc_shutdown, | |
2606 | .setsockopt = tipc_setsockopt, | |
2607 | .getsockopt = tipc_getsockopt, | |
2608 | .sendmsg = tipc_send_stream, | |
2609 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2610 | .mmap = sock_no_mmap, |
2611 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2612 | }; |
2613 | ||
bca65eae | 2614 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2615 | .owner = THIS_MODULE, |
b97bf3fd | 2616 | .family = AF_TIPC, |
c5fa7b3c | 2617 | .create = tipc_sk_create |
b97bf3fd PL |
2618 | }; |
2619 | ||
2620 | static struct proto tipc_proto = { | |
2621 | .name = "TIPC", | |
2622 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2623 | .obj_size = sizeof(struct tipc_sock), |
2624 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2625 | }; |
2626 | ||
c5fa7b3c YX |
2627 | static struct proto tipc_proto_kern = { |
2628 | .name = "TIPC", | |
2629 | .obj_size = sizeof(struct tipc_sock), | |
2630 | .sysctl_rmem = sysctl_tipc_rmem | |
2631 | }; | |
2632 | ||
b97bf3fd | 2633 | /** |
4323add6 | 2634 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2635 | * |
b97bf3fd PL |
2636 | * Returns 0 on success, errno otherwise |
2637 | */ | |
4323add6 | 2638 | int tipc_socket_init(void) |
b97bf3fd PL |
2639 | { |
2640 | int res; | |
2641 | ||
c4307285 | 2642 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2643 | if (res) { |
2cf8aa19 | 2644 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2645 | goto out; |
2646 | } | |
2647 | ||
2648 | res = sock_register(&tipc_family_ops); | |
2649 | if (res) { | |
2cf8aa19 | 2650 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2651 | proto_unregister(&tipc_proto); |
2652 | goto out; | |
2653 | } | |
b97bf3fd PL |
2654 | out: |
2655 | return res; | |
2656 | } | |
2657 | ||
2658 | /** | |
4323add6 | 2659 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2660 | */ |
4323add6 | 2661 | void tipc_socket_stop(void) |
b97bf3fd | 2662 | { |
b97bf3fd PL |
2663 | sock_unregister(tipc_family_ops.family); |
2664 | proto_unregister(&tipc_proto); | |
2665 | } | |
34b78a12 RA |
2666 | |
2667 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2668 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2669 | { |
2670 | u32 peer_node; | |
2671 | u32 peer_port; | |
2672 | struct nlattr *nest; | |
2673 | ||
2674 | peer_node = tsk_peer_node(tsk); | |
2675 | peer_port = tsk_peer_port(tsk); | |
2676 | ||
2677 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2678 | ||
2679 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2680 | goto msg_full; | |
2681 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2682 | goto msg_full; | |
2683 | ||
2684 | if (tsk->conn_type != 0) { | |
2685 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2686 | goto msg_full; | |
2687 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2688 | goto msg_full; | |
2689 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2690 | goto msg_full; | |
2691 | } | |
2692 | nla_nest_end(skb, nest); | |
2693 | ||
2694 | return 0; | |
2695 | ||
2696 | msg_full: | |
2697 | nla_nest_cancel(skb, nest); | |
2698 | ||
2699 | return -EMSGSIZE; | |
2700 | } | |
2701 | ||
2702 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2703 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2704 | struct tipc_sock *tsk) | |
34b78a12 RA |
2705 | { |
2706 | int err; | |
2707 | void *hdr; | |
2708 | struct nlattr *attrs; | |
34747539 YX |
2709 | struct net *net = sock_net(skb->sk); |
2710 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2711 | |
2712 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2713 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); | |
2714 | if (!hdr) | |
2715 | goto msg_cancel; | |
2716 | ||
2717 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2718 | if (!attrs) | |
2719 | goto genlmsg_cancel; | |
07f6c4bc | 2720 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2721 | goto attr_msg_cancel; |
34747539 | 2722 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2723 | goto attr_msg_cancel; |
2724 | ||
2725 | if (tsk->connected) { | |
2726 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2727 | if (err) | |
2728 | goto attr_msg_cancel; | |
2729 | } else if (!list_empty(&tsk->publications)) { | |
2730 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2731 | goto attr_msg_cancel; | |
2732 | } | |
2733 | nla_nest_end(skb, attrs); | |
2734 | genlmsg_end(skb, hdr); | |
2735 | ||
2736 | return 0; | |
2737 | ||
2738 | attr_msg_cancel: | |
2739 | nla_nest_cancel(skb, attrs); | |
2740 | genlmsg_cancel: | |
2741 | genlmsg_cancel(skb, hdr); | |
2742 | msg_cancel: | |
2743 | return -EMSGSIZE; | |
2744 | } | |
2745 | ||
2746 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2747 | { | |
2748 | int err; | |
2749 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2750 | const struct bucket_table *tbl; |
2751 | struct rhash_head *pos; | |
e05b31f4 YX |
2752 | struct net *net = sock_net(skb->sk); |
2753 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2754 | u32 tbl_id = cb->args[0]; |
2755 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2756 | |
07f6c4bc | 2757 | rcu_read_lock(); |
e05b31f4 | 2758 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2759 | for (; tbl_id < tbl->size; tbl_id++) { |
2760 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2761 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2762 | if (prev_portid && prev_portid != tsk->portid) { |
2763 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2764 | continue; | |
2765 | } | |
2766 | ||
07f6c4bc | 2767 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2768 | if (err) { |
2769 | prev_portid = tsk->portid; | |
2770 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2771 | goto out; | |
2772 | } | |
2773 | prev_portid = 0; | |
07f6c4bc | 2774 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2775 | } |
34b78a12 | 2776 | } |
d6e164e3 | 2777 | out: |
07f6c4bc | 2778 | rcu_read_unlock(); |
d6e164e3 RA |
2779 | cb->args[0] = tbl_id; |
2780 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2781 | |
2782 | return skb->len; | |
2783 | } | |
1a1a143d RA |
2784 | |
2785 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2786 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2787 | struct netlink_callback *cb, | |
2788 | struct publication *publ) | |
1a1a143d RA |
2789 | { |
2790 | void *hdr; | |
2791 | struct nlattr *attrs; | |
2792 | ||
2793 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2794 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); | |
2795 | if (!hdr) | |
2796 | goto msg_cancel; | |
2797 | ||
2798 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2799 | if (!attrs) | |
2800 | goto genlmsg_cancel; | |
2801 | ||
2802 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2803 | goto attr_msg_cancel; | |
2804 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2805 | goto attr_msg_cancel; | |
2806 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2807 | goto attr_msg_cancel; | |
2808 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2809 | goto attr_msg_cancel; | |
2810 | ||
2811 | nla_nest_end(skb, attrs); | |
2812 | genlmsg_end(skb, hdr); | |
2813 | ||
2814 | return 0; | |
2815 | ||
2816 | attr_msg_cancel: | |
2817 | nla_nest_cancel(skb, attrs); | |
2818 | genlmsg_cancel: | |
2819 | genlmsg_cancel(skb, hdr); | |
2820 | msg_cancel: | |
2821 | return -EMSGSIZE; | |
2822 | } | |
2823 | ||
2824 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2825 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2826 | struct netlink_callback *cb, | |
2827 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2828 | { |
2829 | int err; | |
2830 | struct publication *p; | |
2831 | ||
2832 | if (*last_publ) { | |
2833 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2834 | if (p->key == *last_publ) | |
2835 | break; | |
2836 | } | |
2837 | if (p->key != *last_publ) { | |
2838 | /* We never set seq or call nl_dump_check_consistent() | |
2839 | * this means that setting prev_seq here will cause the | |
2840 | * consistence check to fail in the netlink callback | |
2841 | * handler. Resulting in the last NLMSG_DONE message | |
2842 | * having the NLM_F_DUMP_INTR flag set. | |
2843 | */ | |
2844 | cb->prev_seq = 1; | |
2845 | *last_publ = 0; | |
2846 | return -EPIPE; | |
2847 | } | |
2848 | } else { | |
2849 | p = list_first_entry(&tsk->publications, struct publication, | |
2850 | pport_list); | |
2851 | } | |
2852 | ||
2853 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2854 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2855 | if (err) { | |
2856 | *last_publ = p->key; | |
2857 | return err; | |
2858 | } | |
2859 | } | |
2860 | *last_publ = 0; | |
2861 | ||
2862 | return 0; | |
2863 | } | |
2864 | ||
2865 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2866 | { | |
2867 | int err; | |
07f6c4bc | 2868 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2869 | u32 last_publ = cb->args[1]; |
2870 | u32 done = cb->args[2]; | |
e05b31f4 | 2871 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2872 | struct tipc_sock *tsk; |
2873 | ||
07f6c4bc | 2874 | if (!tsk_portid) { |
1a1a143d RA |
2875 | struct nlattr **attrs; |
2876 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2877 | ||
2878 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2879 | if (err) | |
2880 | return err; | |
2881 | ||
2882 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2883 | attrs[TIPC_NLA_SOCK], | |
2884 | tipc_nl_sock_policy); | |
2885 | if (err) | |
2886 | return err; | |
2887 | ||
2888 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2889 | return -EINVAL; | |
2890 | ||
07f6c4bc | 2891 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2892 | } |
2893 | ||
2894 | if (done) | |
2895 | return 0; | |
2896 | ||
e05b31f4 | 2897 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2898 | if (!tsk) |
2899 | return -EINVAL; | |
2900 | ||
2901 | lock_sock(&tsk->sk); | |
2902 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2903 | if (!err) | |
2904 | done = 1; | |
2905 | release_sock(&tsk->sk); | |
07f6c4bc | 2906 | sock_put(&tsk->sk); |
1a1a143d | 2907 | |
07f6c4bc | 2908 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2909 | cb->args[1] = last_publ; |
2910 | cb->args[2] = done; | |
2911 | ||
2912 | return skb->len; | |
2913 | } |