Commit | Line | Data |
---|---|---|
b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2001-2007, 2012-2015, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc | 37 | #include <linux/rhashtable.h> |
b97bf3fd | 38 | #include "core.h" |
e2dafe87 | 39 | #include "name_table.h" |
78acb1f9 | 40 | #include "node.h" |
e2dafe87 | 41 | #include "link.h" |
c637c103 | 42 | #include "name_distr.h" |
2e84c60b | 43 | #include "socket.h" |
a6bf70f7 | 44 | #include "bcast.h" |
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 | * @conn_timeout: the time we can wait for an unresponded setup request |
73 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
74 | * @link_cong: non-zero if owner must sleep because of link congestion | |
75 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
76 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
f2f8036e | 77 | * @remote: 'connected' peer for dgram/rdm |
07f6c4bc YX |
78 | * @node: hash table node |
79 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
80 | */ |
81 | struct tipc_sock { | |
82 | struct sock sk; | |
83 | int connected; | |
84 | u32 conn_type; | |
85 | u32 conn_instance; | |
86 | int published; | |
87 | u32 max_pkt; | |
07f6c4bc | 88 | u32 portid; |
301bae56 JPM |
89 | struct tipc_msg phdr; |
90 | struct list_head sock_list; | |
91 | struct list_head publications; | |
92 | u32 pub_count; | |
93 | u32 probing_state; | |
2f55c437 | 94 | unsigned long probing_intv; |
301bae56 JPM |
95 | uint conn_timeout; |
96 | atomic_t dupl_rcvcnt; | |
97 | bool link_cong; | |
98 | uint sent_unacked; | |
99 | uint rcv_unacked; | |
f2f8036e | 100 | struct sockaddr_tipc remote; |
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); | |
39a0295f YX |
119 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
120 | size_t dsz); | |
121 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 122 | |
bca65eae FW |
123 | static const struct proto_ops packet_ops; |
124 | static const struct proto_ops stream_ops; | |
125 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
126 | static struct proto tipc_proto; |
127 | ||
1a1a143d RA |
128 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
129 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
130 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
131 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
132 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
133 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
134 | }; | |
135 | ||
6cca7289 HX |
136 | static const struct rhashtable_params tsk_rht_params; |
137 | ||
c4307285 | 138 | /* |
0c3141e9 AS |
139 | * Revised TIPC socket locking policy: |
140 | * | |
141 | * Most socket operations take the standard socket lock when they start | |
142 | * and hold it until they finish (or until they need to sleep). Acquiring | |
143 | * this lock grants the owner exclusive access to the fields of the socket | |
144 | * data structures, with the exception of the backlog queue. A few socket | |
145 | * operations can be done without taking the socket lock because they only | |
146 | * read socket information that never changes during the life of the socket. | |
147 | * | |
148 | * Socket operations may acquire the lock for the associated TIPC port if they | |
149 | * need to perform an operation on the port. If any routine needs to acquire | |
150 | * both the socket lock and the port lock it must take the socket lock first | |
151 | * to avoid the risk of deadlock. | |
152 | * | |
153 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
154 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
155 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
156 | * and either handles the message itself or adds it to the socket's backlog | |
157 | * queue; in the latter case the queued message is processed once the process | |
158 | * owning the socket lock releases it. | |
159 | * | |
160 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
161 | * the problem of a blocked socket operation preventing any other operations | |
162 | * from occurring. However, applications must be careful if they have | |
163 | * multiple threads trying to send (or receive) on the same socket, as these | |
164 | * operations might interfere with each other. For example, doing a connect | |
165 | * and a receive at the same time might allow the receive to consume the | |
166 | * ACK message meant for the connect. While additional work could be done | |
167 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
168 | * | |
169 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
170 | * that another operation that must be performed in a non-blocking manner is | |
171 | * not delayed for very long because the lock has already been taken. | |
172 | * | |
173 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
174 | * constant over its lifetime; such fields can be examined without taking | |
175 | * the socket lock and/or port lock, and do not need to be re-read even | |
176 | * after resuming processing after waiting. These fields include: | |
177 | * - socket type | |
178 | * - pointer to socket sk structure (aka tipc_sock structure) | |
179 | * - pointer to port structure | |
180 | * - port reference | |
181 | */ | |
182 | ||
c5898636 JPM |
183 | static u32 tsk_own_node(struct tipc_sock *tsk) |
184 | { | |
185 | return msg_prevnode(&tsk->phdr); | |
186 | } | |
187 | ||
301bae56 | 188 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 189 | { |
301bae56 | 190 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
191 | } |
192 | ||
301bae56 | 193 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 194 | { |
301bae56 | 195 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
196 | } |
197 | ||
301bae56 | 198 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 199 | { |
301bae56 | 200 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
201 | } |
202 | ||
301bae56 | 203 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 204 | { |
301bae56 | 205 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
206 | } |
207 | ||
301bae56 | 208 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 209 | { |
301bae56 | 210 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
211 | } |
212 | ||
301bae56 | 213 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 214 | { |
301bae56 | 215 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
216 | } |
217 | ||
301bae56 | 218 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 219 | { |
301bae56 | 220 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
221 | } |
222 | ||
301bae56 | 223 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
224 | { |
225 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
226 | return -EINVAL; | |
301bae56 | 227 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
228 | return 0; |
229 | } | |
8826cde6 | 230 | |
301bae56 JPM |
231 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
232 | { | |
233 | return container_of(sk, struct tipc_sock, sk); | |
234 | } | |
235 | ||
236 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
237 | { | |
238 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
239 | } | |
240 | ||
0c3141e9 | 241 | /** |
2e84c60b | 242 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
243 | * |
244 | * Caller must hold socket lock | |
b97bf3fd | 245 | */ |
2e84c60b | 246 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 247 | { |
5f6d9123 | 248 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
249 | } |
250 | ||
b97bf3fd | 251 | /** |
2e84c60b | 252 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
253 | * |
254 | * Caller must hold socket lock | |
b97bf3fd | 255 | */ |
2e84c60b | 256 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 257 | { |
a6ca1094 | 258 | struct sk_buff *skb; |
8db1bae3 | 259 | u32 dnode; |
c5898636 | 260 | u32 own_node = tsk_own_node(tipc_sk(sk)); |
0c3141e9 | 261 | |
a6ca1094 | 262 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
c5898636 JPM |
263 | if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT)) |
264 | tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0); | |
8db1bae3 | 265 | } |
b97bf3fd PL |
266 | } |
267 | ||
2e84c60b | 268 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
269 | * |
270 | * Handles cases where the node's network address has changed from | |
271 | * the default of <0.0.0> to its configured setting. | |
272 | */ | |
2e84c60b | 273 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 274 | { |
34747539 | 275 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 276 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
277 | u32 orig_node; |
278 | u32 peer_node; | |
279 | ||
301bae56 | 280 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
281 | return false; |
282 | ||
283 | if (unlikely(msg_origport(msg) != peer_port)) | |
284 | return false; | |
285 | ||
286 | orig_node = msg_orignode(msg); | |
301bae56 | 287 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
288 | |
289 | if (likely(orig_node == peer_node)) | |
290 | return true; | |
291 | ||
34747539 | 292 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
293 | return true; |
294 | ||
34747539 | 295 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
296 | return true; |
297 | ||
298 | return false; | |
299 | } | |
300 | ||
b97bf3fd | 301 | /** |
c5fa7b3c | 302 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 303 | * @net: network namespace (must be default network) |
b97bf3fd PL |
304 | * @sock: pre-allocated socket structure |
305 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 306 | * @kern: caused by kernel or by userspace? |
c4307285 | 307 | * |
0c3141e9 AS |
308 | * This routine creates additional data structures used by the TIPC socket, |
309 | * initializes them, and links them together. | |
b97bf3fd PL |
310 | * |
311 | * Returns 0 on success, errno otherwise | |
312 | */ | |
58ed9442 JPM |
313 | static int tipc_sk_create(struct net *net, struct socket *sock, |
314 | int protocol, int kern) | |
b97bf3fd | 315 | { |
c5898636 | 316 | struct tipc_net *tn; |
0c3141e9 AS |
317 | const struct proto_ops *ops; |
318 | socket_state state; | |
b97bf3fd | 319 | struct sock *sk; |
58ed9442 | 320 | struct tipc_sock *tsk; |
5b8fa7ce | 321 | struct tipc_msg *msg; |
0c3141e9 AS |
322 | |
323 | /* Validate arguments */ | |
b97bf3fd PL |
324 | if (unlikely(protocol != 0)) |
325 | return -EPROTONOSUPPORT; | |
326 | ||
b97bf3fd PL |
327 | switch (sock->type) { |
328 | case SOCK_STREAM: | |
0c3141e9 AS |
329 | ops = &stream_ops; |
330 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
331 | break; |
332 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
333 | ops = &packet_ops; |
334 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
335 | break; |
336 | case SOCK_DGRAM: | |
b97bf3fd | 337 | case SOCK_RDM: |
0c3141e9 AS |
338 | ops = &msg_ops; |
339 | state = SS_READY; | |
b97bf3fd | 340 | break; |
49978651 | 341 | default: |
49978651 | 342 | return -EPROTOTYPE; |
b97bf3fd PL |
343 | } |
344 | ||
0c3141e9 | 345 | /* Allocate socket's protocol area */ |
11aa9c28 | 346 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 347 | if (sk == NULL) |
b97bf3fd | 348 | return -ENOMEM; |
b97bf3fd | 349 | |
58ed9442 | 350 | tsk = tipc_sk(sk); |
301bae56 | 351 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
352 | INIT_LIST_HEAD(&tsk->publications); |
353 | msg = &tsk->phdr; | |
c5898636 JPM |
354 | tn = net_generic(sock_net(sk), tipc_net_id); |
355 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 356 | NAMED_H_SIZE, 0); |
b97bf3fd | 357 | |
0c3141e9 | 358 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
359 | sock->ops = ops; |
360 | sock->state = state; | |
0c3141e9 | 361 | sock_init_data(sock, sk); |
07f6c4bc YX |
362 | if (tipc_sk_insert(tsk)) { |
363 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
364 | return -EINVAL; | |
365 | } | |
366 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 367 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 368 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 369 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
370 | sk->sk_data_ready = tipc_data_ready; |
371 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 372 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 373 | tsk->sent_unacked = 0; |
4f4482dc | 374 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 375 | |
0c3141e9 | 376 | if (sock->state == SS_READY) { |
301bae56 | 377 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 378 | if (sock->type == SOCK_DGRAM) |
301bae56 | 379 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 380 | } |
b97bf3fd PL |
381 | return 0; |
382 | } | |
383 | ||
07f6c4bc YX |
384 | static void tipc_sk_callback(struct rcu_head *head) |
385 | { | |
386 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
387 | ||
388 | sock_put(&tsk->sk); | |
389 | } | |
390 | ||
b97bf3fd | 391 | /** |
247f0f3c | 392 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
393 | * @sock: socket to destroy |
394 | * | |
395 | * This routine cleans up any messages that are still queued on the socket. | |
396 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
397 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
398 | * and any others are discarded. (If the first message on a STREAM socket | |
399 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 400 | * |
b97bf3fd PL |
401 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
402 | * are returned or discarded according to the "destination droppable" setting | |
403 | * specified for the message by the sender. | |
404 | * | |
405 | * Returns 0 on success, errno otherwise | |
406 | */ | |
247f0f3c | 407 | static int tipc_release(struct socket *sock) |
b97bf3fd | 408 | { |
b97bf3fd | 409 | struct sock *sk = sock->sk; |
357c4774 | 410 | struct net *net; |
58ed9442 | 411 | struct tipc_sock *tsk; |
a6ca1094 | 412 | struct sk_buff *skb; |
f2f2a96a | 413 | u32 dnode, probing_state; |
b97bf3fd | 414 | |
0c3141e9 AS |
415 | /* |
416 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
417 | * releases a pre-allocated child socket that was never used) | |
418 | */ | |
0c3141e9 | 419 | if (sk == NULL) |
b97bf3fd | 420 | return 0; |
c4307285 | 421 | |
357c4774 | 422 | net = sock_net(sk); |
58ed9442 | 423 | tsk = tipc_sk(sk); |
0c3141e9 AS |
424 | lock_sock(sk); |
425 | ||
426 | /* | |
427 | * Reject all unreceived messages, except on an active connection | |
428 | * (which disconnects locally & sends a 'FIN+' to peer) | |
429 | */ | |
301bae56 | 430 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 431 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
432 | skb = __skb_dequeue(&sk->sk_receive_queue); |
433 | if (skb == NULL) | |
b97bf3fd | 434 | break; |
a6ca1094 YX |
435 | if (TIPC_SKB_CB(skb)->handle != NULL) |
436 | kfree_skb(skb); | |
0c3141e9 AS |
437 | else { |
438 | if ((sock->state == SS_CONNECTING) || | |
439 | (sock->state == SS_CONNECTED)) { | |
440 | sock->state = SS_DISCONNECTING; | |
301bae56 | 441 | tsk->connected = 0; |
f2f9800d | 442 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 443 | } |
c5898636 | 444 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 445 | TIPC_ERR_NO_PORT)) |
f2f9800d | 446 | tipc_link_xmit_skb(net, skb, dnode, 0); |
0c3141e9 | 447 | } |
b97bf3fd PL |
448 | } |
449 | ||
301bae56 | 450 | tipc_sk_withdraw(tsk, 0, NULL); |
f2f2a96a | 451 | probing_state = tsk->probing_state; |
3721e9c7 YX |
452 | if (del_timer_sync(&sk->sk_timer) && |
453 | probing_state != TIPC_CONN_PROBING) | |
f2f2a96a | 454 | sock_put(sk); |
07f6c4bc | 455 | tipc_sk_remove(tsk); |
301bae56 | 456 | if (tsk->connected) { |
c5898636 | 457 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 458 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 459 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 460 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 461 | if (skb) |
f2f9800d YX |
462 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
463 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
5b8fa7ce | 464 | } |
b97bf3fd | 465 | |
0c3141e9 | 466 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 467 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 468 | |
0c3141e9 | 469 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
470 | sock->state = SS_DISCONNECTING; |
471 | release_sock(sk); | |
07f6c4bc YX |
472 | |
473 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 474 | sock->sk = NULL; |
b97bf3fd | 475 | |
065d7e39 | 476 | return 0; |
b97bf3fd PL |
477 | } |
478 | ||
479 | /** | |
247f0f3c | 480 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
481 | * @sock: socket structure |
482 | * @uaddr: socket address describing name(s) and desired operation | |
483 | * @uaddr_len: size of socket address data structure | |
c4307285 | 484 | * |
b97bf3fd PL |
485 | * Name and name sequence binding is indicated using a positive scope value; |
486 | * a negative scope value unbinds the specified name. Specifying no name | |
487 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 488 | * |
b97bf3fd | 489 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
490 | * |
491 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
492 | * access any non-constant socket information. | |
b97bf3fd | 493 | */ |
247f0f3c YX |
494 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
495 | int uaddr_len) | |
b97bf3fd | 496 | { |
84602761 | 497 | struct sock *sk = sock->sk; |
b97bf3fd | 498 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 499 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 500 | int res = -EINVAL; |
b97bf3fd | 501 | |
84602761 YX |
502 | lock_sock(sk); |
503 | if (unlikely(!uaddr_len)) { | |
301bae56 | 504 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
505 | goto exit; |
506 | } | |
c4307285 | 507 | |
84602761 YX |
508 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
509 | res = -EINVAL; | |
510 | goto exit; | |
511 | } | |
512 | if (addr->family != AF_TIPC) { | |
513 | res = -EAFNOSUPPORT; | |
514 | goto exit; | |
515 | } | |
b97bf3fd | 516 | |
b97bf3fd PL |
517 | if (addr->addrtype == TIPC_ADDR_NAME) |
518 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
519 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
520 | res = -EAFNOSUPPORT; | |
521 | goto exit; | |
522 | } | |
c4307285 | 523 | |
13a2e898 | 524 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 525 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
526 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
527 | res = -EACCES; | |
528 | goto exit; | |
529 | } | |
c422f1bd | 530 | |
84602761 | 531 | res = (addr->scope > 0) ? |
301bae56 JPM |
532 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
533 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
534 | exit: |
535 | release_sock(sk); | |
536 | return res; | |
b97bf3fd PL |
537 | } |
538 | ||
c4307285 | 539 | /** |
247f0f3c | 540 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
541 | * @sock: socket structure |
542 | * @uaddr: area for returned socket address | |
543 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 544 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 545 | * |
b97bf3fd | 546 | * Returns 0 on success, errno otherwise |
0c3141e9 | 547 | * |
2da59918 AS |
548 | * NOTE: This routine doesn't need to take the socket lock since it only |
549 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 550 | * a completely predictable manner). |
b97bf3fd | 551 | */ |
247f0f3c YX |
552 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
553 | int *uaddr_len, int peer) | |
b97bf3fd | 554 | { |
b97bf3fd | 555 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 556 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 557 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 558 | |
88f8a5e3 | 559 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 560 | if (peer) { |
2da59918 AS |
561 | if ((sock->state != SS_CONNECTED) && |
562 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
563 | return -ENOTCONN; | |
301bae56 JPM |
564 | addr->addr.id.ref = tsk_peer_port(tsk); |
565 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 566 | } else { |
07f6c4bc | 567 | addr->addr.id.ref = tsk->portid; |
34747539 | 568 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 569 | } |
b97bf3fd PL |
570 | |
571 | *uaddr_len = sizeof(*addr); | |
572 | addr->addrtype = TIPC_ADDR_ID; | |
573 | addr->family = AF_TIPC; | |
574 | addr->scope = 0; | |
b97bf3fd PL |
575 | addr->addr.name.domain = 0; |
576 | ||
0c3141e9 | 577 | return 0; |
b97bf3fd PL |
578 | } |
579 | ||
580 | /** | |
247f0f3c | 581 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
582 | * @file: file structure associated with the socket |
583 | * @sock: socket for which to calculate the poll bits | |
584 | * @wait: ??? | |
585 | * | |
9b674e82 AS |
586 | * Returns pollmask value |
587 | * | |
588 | * COMMENTARY: | |
589 | * It appears that the usual socket locking mechanisms are not useful here | |
590 | * since the pollmask info is potentially out-of-date the moment this routine | |
591 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
592 | * to handle any preventable race conditions, so TIPC will do the same ... | |
593 | * | |
594 | * TIPC sets the returned events as follows: | |
f662c070 AS |
595 | * |
596 | * socket state flags set | |
597 | * ------------ --------- | |
598 | * unconnected no read flags | |
c4fc298a | 599 | * POLLOUT if port is not congested |
f662c070 AS |
600 | * |
601 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
602 | * no write flags | |
603 | * | |
604 | * connected POLLIN/POLLRDNORM if data in rx queue | |
605 | * POLLOUT if port is not congested | |
606 | * | |
607 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
608 | * no write flags | |
609 | * | |
610 | * listening POLLIN if SYN in rx queue | |
611 | * no write flags | |
612 | * | |
613 | * ready POLLIN/POLLRDNORM if data in rx queue | |
614 | * [connectionless] POLLOUT (since port cannot be congested) | |
615 | * | |
616 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
617 | * imply that the operation will succeed, merely that it should be performed | |
618 | * and will not block. | |
b97bf3fd | 619 | */ |
247f0f3c YX |
620 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
621 | poll_table *wait) | |
b97bf3fd | 622 | { |
9b674e82 | 623 | struct sock *sk = sock->sk; |
58ed9442 | 624 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 625 | u32 mask = 0; |
9b674e82 | 626 | |
f288bef4 | 627 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 628 | |
f662c070 | 629 | switch ((int)sock->state) { |
c4fc298a | 630 | case SS_UNCONNECTED: |
60120526 | 631 | if (!tsk->link_cong) |
c4fc298a EH |
632 | mask |= POLLOUT; |
633 | break; | |
f662c070 AS |
634 | case SS_READY: |
635 | case SS_CONNECTED: | |
301bae56 | 636 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
637 | mask |= POLLOUT; |
638 | /* fall thru' */ | |
639 | case SS_CONNECTING: | |
640 | case SS_LISTENING: | |
641 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
642 | mask |= (POLLIN | POLLRDNORM); | |
643 | break; | |
644 | case SS_DISCONNECTING: | |
645 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
646 | break; | |
647 | } | |
9b674e82 AS |
648 | |
649 | return mask; | |
b97bf3fd PL |
650 | } |
651 | ||
0abd8ff2 JPM |
652 | /** |
653 | * tipc_sendmcast - send multicast message | |
654 | * @sock: socket structure | |
655 | * @seq: destination address | |
562640f3 | 656 | * @msg: message to send |
0abd8ff2 JPM |
657 | * @dsz: total length of message data |
658 | * @timeo: timeout to wait for wakeup | |
659 | * | |
660 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
661 | * Returns the number of bytes sent on success, or errno | |
662 | */ | |
663 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 664 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
665 | { |
666 | struct sock *sk = sock->sk; | |
c5898636 | 667 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 668 | struct net *net = sock_net(sk); |
c5898636 | 669 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 670 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
f25dcc76 | 671 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
672 | uint mtu; |
673 | int rc; | |
674 | ||
675 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
676 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
677 | msg_set_destport(mhdr, 0); | |
678 | msg_set_destnode(mhdr, 0); | |
679 | msg_set_nametype(mhdr, seq->type); | |
680 | msg_set_namelower(mhdr, seq->lower); | |
681 | msg_set_nameupper(mhdr, seq->upper); | |
682 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
683 | ||
684 | new_mtu: | |
685 | mtu = tipc_bclink_get_mtu(); | |
94153e36 | 686 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
0abd8ff2 JPM |
687 | if (unlikely(rc < 0)) |
688 | return rc; | |
689 | ||
690 | do { | |
94153e36 | 691 | rc = tipc_bclink_xmit(net, pktchain); |
0abd8ff2 JPM |
692 | if (likely(rc >= 0)) { |
693 | rc = dsz; | |
694 | break; | |
695 | } | |
f25dcc76 AV |
696 | if (rc == -EMSGSIZE) { |
697 | msg->msg_iter = save; | |
0abd8ff2 | 698 | goto new_mtu; |
f25dcc76 | 699 | } |
0abd8ff2 JPM |
700 | if (rc != -ELINKCONG) |
701 | break; | |
50100a5e | 702 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
703 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
704 | if (rc) | |
94153e36 | 705 | __skb_queue_purge(pktchain); |
0abd8ff2 JPM |
706 | } while (!rc); |
707 | return rc; | |
708 | } | |
709 | ||
cb1b7280 JPM |
710 | /** |
711 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
712 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
713 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
714 | * | |
715 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 716 | */ |
cb1b7280 JPM |
717 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
718 | struct sk_buff_head *inputq) | |
078bec82 | 719 | { |
cb1b7280 | 720 | struct tipc_msg *msg; |
3c724acd | 721 | struct tipc_plist dports; |
3c724acd | 722 | u32 portid; |
078bec82 | 723 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
724 | struct sk_buff_head tmpq; |
725 | uint hsz; | |
726 | struct sk_buff *skb, *_skb; | |
3c724acd | 727 | |
cb1b7280 | 728 | __skb_queue_head_init(&tmpq); |
3c724acd | 729 | tipc_plist_init(&dports); |
078bec82 | 730 | |
cb1b7280 JPM |
731 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
732 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
733 | msg = buf_msg(skb); | |
734 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
735 | ||
736 | if (in_own_node(net, msg_orignode(msg))) | |
737 | scope = TIPC_NODE_SCOPE; | |
738 | ||
739 | /* Create destination port list and message clones: */ | |
740 | tipc_nametbl_mc_translate(net, | |
741 | msg_nametype(msg), msg_namelower(msg), | |
742 | msg_nameupper(msg), scope, &dports); | |
743 | portid = tipc_plist_pop(&dports); | |
744 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
745 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
746 | if (_skb) { | |
747 | msg_set_destport(buf_msg(_skb), portid); | |
748 | __skb_queue_tail(&tmpq, _skb); | |
749 | continue; | |
750 | } | |
751 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 752 | } |
cb1b7280 JPM |
753 | /* Append to inputq if not already done by other thread */ |
754 | spin_lock_bh(&inputq->lock); | |
755 | if (skb_peek(arrvq) == skb) { | |
756 | skb_queue_splice_tail_init(&tmpq, inputq); | |
757 | kfree_skb(__skb_dequeue(arrvq)); | |
758 | } | |
759 | spin_unlock_bh(&inputq->lock); | |
760 | __skb_queue_purge(&tmpq); | |
761 | kfree_skb(skb); | |
078bec82 | 762 | } |
cb1b7280 | 763 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
764 | } |
765 | ||
ac0074ee JPM |
766 | /** |
767 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
768 | * @tsk: receiving socket | |
1186adf7 | 769 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed. |
ac0074ee | 770 | */ |
1186adf7 | 771 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb) |
ac0074ee | 772 | { |
1186adf7 | 773 | struct tipc_msg *msg = buf_msg(*skb); |
60120526 | 774 | int conn_cong; |
1186adf7 JPM |
775 | u32 dnode; |
776 | u32 own_node = tsk_own_node(tsk); | |
ac0074ee | 777 | /* Ignore if connection cannot be validated: */ |
2e84c60b | 778 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
779 | goto exit; |
780 | ||
301bae56 | 781 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
782 | |
783 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 784 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
785 | tsk->sent_unacked -= msg_msgcnt(msg); |
786 | if (conn_cong) | |
50100a5e | 787 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee | 788 | } else if (msg_type(msg) == CONN_PROBE) { |
1186adf7 JPM |
789 | if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) { |
790 | msg_set_type(msg, CONN_PROBE_REPLY); | |
791 | return; | |
792 | } | |
ac0074ee JPM |
793 | } |
794 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
795 | exit: | |
1186adf7 JPM |
796 | kfree_skb(*skb); |
797 | *skb = NULL; | |
ac0074ee JPM |
798 | } |
799 | ||
3f40504f YX |
800 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
801 | { | |
802 | struct sock *sk = sock->sk; | |
58ed9442 | 803 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
804 | DEFINE_WAIT(wait); |
805 | int done; | |
806 | ||
807 | do { | |
808 | int err = sock_error(sk); | |
809 | if (err) | |
810 | return err; | |
811 | if (sock->state == SS_DISCONNECTING) | |
812 | return -EPIPE; | |
813 | if (!*timeo_p) | |
814 | return -EAGAIN; | |
815 | if (signal_pending(current)) | |
816 | return sock_intr_errno(*timeo_p); | |
817 | ||
818 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 819 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
820 | finish_wait(sk_sleep(sk), &wait); |
821 | } while (!done); | |
822 | return 0; | |
823 | } | |
824 | ||
b97bf3fd | 825 | /** |
247f0f3c | 826 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
827 | * @sock: socket structure |
828 | * @m: message to send | |
e2dafe87 | 829 | * @dsz: amount of user data to be sent |
c4307285 | 830 | * |
b97bf3fd | 831 | * Message must have an destination specified explicitly. |
c4307285 | 832 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
833 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
834 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 835 | * |
b97bf3fd PL |
836 | * Returns the number of bytes sent on success, or errno otherwise |
837 | */ | |
1b784140 | 838 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 839 | struct msghdr *m, size_t dsz) |
39a0295f YX |
840 | { |
841 | struct sock *sk = sock->sk; | |
842 | int ret; | |
843 | ||
844 | lock_sock(sk); | |
845 | ret = __tipc_sendmsg(sock, m, dsz); | |
846 | release_sock(sk); | |
847 | ||
848 | return ret; | |
849 | } | |
850 | ||
851 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 852 | { |
e2dafe87 | 853 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 854 | struct sock *sk = sock->sk; |
58ed9442 | 855 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 856 | struct net *net = sock_net(sk); |
301bae56 | 857 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 858 | u32 dnode, dport; |
94153e36 | 859 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
a6ca1094 | 860 | struct sk_buff *skb; |
f2f8036e | 861 | struct tipc_name_seq *seq; |
f25dcc76 | 862 | struct iov_iter save; |
e2dafe87 | 863 | u32 mtu; |
3f40504f | 864 | long timeo; |
88b17b6a | 865 | int rc; |
b97bf3fd | 866 | |
e2dafe87 | 867 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 868 | return -EMSGSIZE; |
f2f8036e EH |
869 | if (unlikely(!dest)) { |
870 | if (tsk->connected && sock->state == SS_READY) | |
871 | dest = &tsk->remote; | |
872 | else | |
873 | return -EDESTADDRREQ; | |
874 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
875 | dest->family != AF_TIPC) { | |
876 | return -EINVAL; | |
877 | } | |
e2dafe87 | 878 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
879 | if (sock->state == SS_LISTENING) |
880 | return -EPIPE; | |
881 | if (sock->state != SS_UNCONNECTED) | |
882 | return -EISCONN; | |
883 | if (tsk->published) | |
884 | return -EOPNOTSUPP; | |
3388007b | 885 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
886 | tsk->conn_type = dest->addr.name.name.type; |
887 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 888 | } |
b97bf3fd | 889 | } |
f2f8036e | 890 | seq = &dest->addr.nameseq; |
3f40504f | 891 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
892 | |
893 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 894 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
895 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
896 | u32 type = dest->addr.name.name.type; | |
897 | u32 inst = dest->addr.name.name.instance; | |
898 | u32 domain = dest->addr.name.domain; | |
899 | ||
900 | dnode = domain; | |
901 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
902 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
903 | msg_set_nametype(mhdr, type); | |
904 | msg_set_nameinst(mhdr, inst); | |
905 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 906 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
907 | msg_set_destnode(mhdr, dnode); |
908 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
909 | if (unlikely(!dport && !dnode)) |
910 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
911 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
912 | dnode = dest->addr.id.node; | |
913 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
914 | msg_set_lookup_scope(mhdr, 0); | |
915 | msg_set_destnode(mhdr, dnode); | |
916 | msg_set_destport(mhdr, dest->addr.id.ref); | |
917 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
918 | } | |
919 | ||
f25dcc76 | 920 | save = m->msg_iter; |
e2dafe87 | 921 | new_mtu: |
f2f9800d | 922 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
94153e36 | 923 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
e2dafe87 | 924 | if (rc < 0) |
39a0295f | 925 | return rc; |
e2dafe87 JPM |
926 | |
927 | do { | |
94153e36 | 928 | skb = skb_peek(pktchain); |
a6ca1094 | 929 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
94153e36 | 930 | rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid); |
e2dafe87 JPM |
931 | if (likely(rc >= 0)) { |
932 | if (sock->state != SS_READY) | |
0c3141e9 | 933 | sock->state = SS_CONNECTING; |
e2dafe87 | 934 | rc = dsz; |
0c3141e9 | 935 | break; |
c4307285 | 936 | } |
f25dcc76 AV |
937 | if (rc == -EMSGSIZE) { |
938 | m->msg_iter = save; | |
e2dafe87 | 939 | goto new_mtu; |
f25dcc76 | 940 | } |
e2dafe87 | 941 | if (rc != -ELINKCONG) |
0c3141e9 | 942 | break; |
50100a5e | 943 | tsk->link_cong = 1; |
e2dafe87 | 944 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 945 | if (rc) |
94153e36 | 946 | __skb_queue_purge(pktchain); |
e2dafe87 | 947 | } while (!rc); |
e2dafe87 JPM |
948 | |
949 | return rc; | |
b97bf3fd PL |
950 | } |
951 | ||
391a6dd1 YX |
952 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
953 | { | |
954 | struct sock *sk = sock->sk; | |
58ed9442 | 955 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
956 | DEFINE_WAIT(wait); |
957 | int done; | |
958 | ||
959 | do { | |
960 | int err = sock_error(sk); | |
961 | if (err) | |
962 | return err; | |
963 | if (sock->state == SS_DISCONNECTING) | |
964 | return -EPIPE; | |
965 | else if (sock->state != SS_CONNECTED) | |
966 | return -ENOTCONN; | |
967 | if (!*timeo_p) | |
968 | return -EAGAIN; | |
969 | if (signal_pending(current)) | |
970 | return sock_intr_errno(*timeo_p); | |
971 | ||
972 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
973 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 974 | (!tsk->link_cong && |
301bae56 JPM |
975 | !tsk_conn_cong(tsk)) || |
976 | !tsk->connected); | |
391a6dd1 YX |
977 | finish_wait(sk_sleep(sk), &wait); |
978 | } while (!done); | |
979 | return 0; | |
980 | } | |
981 | ||
c4307285 | 982 | /** |
4ccfe5e0 | 983 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 984 | * @sock: socket structure |
4ccfe5e0 JPM |
985 | * @m: data to send |
986 | * @dsz: total length of data to be transmitted | |
c4307285 | 987 | * |
4ccfe5e0 | 988 | * Used for SOCK_STREAM data. |
c4307285 | 989 | * |
4ccfe5e0 JPM |
990 | * Returns the number of bytes sent on success (or partial success), |
991 | * or errno if no data sent | |
b97bf3fd | 992 | */ |
1b784140 | 993 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
994 | { |
995 | struct sock *sk = sock->sk; | |
996 | int ret; | |
997 | ||
998 | lock_sock(sk); | |
999 | ret = __tipc_send_stream(sock, m, dsz); | |
1000 | release_sock(sk); | |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1006 | { |
0c3141e9 | 1007 | struct sock *sk = sock->sk; |
f2f9800d | 1008 | struct net *net = sock_net(sk); |
58ed9442 | 1009 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1010 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 1011 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
342dfc30 | 1012 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1013 | u32 portid = tsk->portid; |
4ccfe5e0 | 1014 | int rc = -EINVAL; |
391a6dd1 | 1015 | long timeo; |
4ccfe5e0 JPM |
1016 | u32 dnode; |
1017 | uint mtu, send, sent = 0; | |
f25dcc76 | 1018 | struct iov_iter save; |
b97bf3fd PL |
1019 | |
1020 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1021 | if (unlikely(dest)) { |
39a0295f | 1022 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1023 | if (dsz && (dsz == rc)) |
60120526 | 1024 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1025 | return rc; |
1026 | } | |
1027 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1028 | return -EMSGSIZE; |
1029 | ||
391a6dd1 YX |
1030 | if (unlikely(sock->state != SS_CONNECTED)) { |
1031 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1032 | return -EPIPE; |
391a6dd1 | 1033 | else |
39a0295f | 1034 | return -ENOTCONN; |
391a6dd1 | 1035 | } |
1d835874 | 1036 | |
391a6dd1 | 1037 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1038 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1039 | |
1040 | next: | |
f25dcc76 | 1041 | save = m->msg_iter; |
301bae56 | 1042 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1043 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
94153e36 | 1044 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
4ccfe5e0 | 1045 | if (unlikely(rc < 0)) |
39a0295f | 1046 | return rc; |
c4307285 | 1047 | do { |
301bae56 | 1048 | if (likely(!tsk_conn_cong(tsk))) { |
94153e36 | 1049 | rc = tipc_link_xmit(net, pktchain, dnode, portid); |
4ccfe5e0 | 1050 | if (likely(!rc)) { |
60120526 | 1051 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1052 | sent += send; |
1053 | if (sent == dsz) | |
1054 | break; | |
1055 | goto next; | |
1056 | } | |
1057 | if (rc == -EMSGSIZE) { | |
f2f9800d YX |
1058 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1059 | portid); | |
f25dcc76 | 1060 | m->msg_iter = save; |
4ccfe5e0 JPM |
1061 | goto next; |
1062 | } | |
1063 | if (rc != -ELINKCONG) | |
1064 | break; | |
50100a5e | 1065 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1066 | } |
1067 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1068 | if (rc) |
94153e36 | 1069 | __skb_queue_purge(pktchain); |
4ccfe5e0 | 1070 | } while (!rc); |
39a0295f | 1071 | |
4ccfe5e0 | 1072 | return sent ? sent : rc; |
b97bf3fd PL |
1073 | } |
1074 | ||
c4307285 | 1075 | /** |
4ccfe5e0 | 1076 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1077 | * @sock: socket structure |
4ccfe5e0 JPM |
1078 | * @m: message to send |
1079 | * @dsz: length of data to be transmitted | |
c4307285 | 1080 | * |
4ccfe5e0 | 1081 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1082 | * |
4ccfe5e0 | 1083 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1084 | */ |
1b784140 | 1085 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1086 | { |
4ccfe5e0 JPM |
1087 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1088 | return -EMSGSIZE; | |
b97bf3fd | 1089 | |
1b784140 | 1090 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1091 | } |
1092 | ||
dadebc00 | 1093 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1094 | */ |
301bae56 | 1095 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1096 | u32 peer_node) |
b97bf3fd | 1097 | { |
3721e9c7 YX |
1098 | struct sock *sk = &tsk->sk; |
1099 | struct net *net = sock_net(sk); | |
301bae56 | 1100 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1101 | |
dadebc00 JPM |
1102 | msg_set_destnode(msg, peer_node); |
1103 | msg_set_destport(msg, peer_port); | |
1104 | msg_set_type(msg, TIPC_CONN_MSG); | |
1105 | msg_set_lookup_scope(msg, 0); | |
1106 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1107 | |
2f55c437 | 1108 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1109 | tsk->probing_state = TIPC_CONN_OK; |
1110 | tsk->connected = 1; | |
3721e9c7 | 1111 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1112 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1113 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1114 | } |
1115 | ||
1116 | /** | |
1117 | * set_orig_addr - capture sender's address for received message | |
1118 | * @m: descriptor for message info | |
1119 | * @msg: received message header | |
c4307285 | 1120 | * |
b97bf3fd PL |
1121 | * Note: Address is not captured if not requested by receiver. |
1122 | */ | |
05790c64 | 1123 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1124 | { |
342dfc30 | 1125 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1126 | |
c4307285 | 1127 | if (addr) { |
b97bf3fd PL |
1128 | addr->family = AF_TIPC; |
1129 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1130 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1131 | addr->addr.id.ref = msg_origport(msg); |
1132 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1133 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1134 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1135 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /** | |
301bae56 | 1140 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1141 | * @m: descriptor for message info |
1142 | * @msg: received message header | |
301bae56 | 1143 | * @tsk: TIPC port associated with message |
c4307285 | 1144 | * |
b97bf3fd | 1145 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1146 | * |
b97bf3fd PL |
1147 | * Returns 0 if successful, otherwise errno |
1148 | */ | |
301bae56 JPM |
1149 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1150 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1151 | { |
1152 | u32 anc_data[3]; | |
1153 | u32 err; | |
1154 | u32 dest_type; | |
3546c750 | 1155 | int has_name; |
b97bf3fd PL |
1156 | int res; |
1157 | ||
1158 | if (likely(m->msg_controllen == 0)) | |
1159 | return 0; | |
1160 | ||
1161 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1162 | err = msg ? msg_errcode(msg) : 0; |
1163 | if (unlikely(err)) { | |
1164 | anc_data[0] = err; | |
1165 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1166 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1167 | if (res) | |
b97bf3fd | 1168 | return res; |
2db9983a AS |
1169 | if (anc_data[1]) { |
1170 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1171 | msg_data(msg)); | |
1172 | if (res) | |
1173 | return res; | |
1174 | } | |
b97bf3fd PL |
1175 | } |
1176 | ||
1177 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1178 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1179 | switch (dest_type) { | |
1180 | case TIPC_NAMED_MSG: | |
3546c750 | 1181 | has_name = 1; |
b97bf3fd PL |
1182 | anc_data[0] = msg_nametype(msg); |
1183 | anc_data[1] = msg_namelower(msg); | |
1184 | anc_data[2] = msg_namelower(msg); | |
1185 | break; | |
1186 | case TIPC_MCAST_MSG: | |
3546c750 | 1187 | has_name = 1; |
b97bf3fd PL |
1188 | anc_data[0] = msg_nametype(msg); |
1189 | anc_data[1] = msg_namelower(msg); | |
1190 | anc_data[2] = msg_nameupper(msg); | |
1191 | break; | |
1192 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1193 | has_name = (tsk->conn_type != 0); |
1194 | anc_data[0] = tsk->conn_type; | |
1195 | anc_data[1] = tsk->conn_instance; | |
1196 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1197 | break; |
1198 | default: | |
3546c750 | 1199 | has_name = 0; |
b97bf3fd | 1200 | } |
2db9983a AS |
1201 | if (has_name) { |
1202 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1203 | if (res) | |
1204 | return res; | |
1205 | } | |
b97bf3fd PL |
1206 | |
1207 | return 0; | |
1208 | } | |
1209 | ||
301bae56 | 1210 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1211 | { |
f2f9800d | 1212 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1213 | struct sk_buff *skb = NULL; |
739f5e4e | 1214 | struct tipc_msg *msg; |
301bae56 JPM |
1215 | u32 peer_port = tsk_peer_port(tsk); |
1216 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1217 | |
301bae56 | 1218 | if (!tsk->connected) |
739f5e4e | 1219 | return; |
c5898636 JPM |
1220 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1221 | dnode, tsk_own_node(tsk), peer_port, | |
1222 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1223 | if (!skb) |
739f5e4e | 1224 | return; |
a6ca1094 | 1225 | msg = buf_msg(skb); |
739f5e4e | 1226 | msg_set_msgcnt(msg, ack); |
f2f9800d | 1227 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1228 | } |
1229 | ||
85d3fc94 | 1230 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1231 | { |
1232 | struct sock *sk = sock->sk; | |
1233 | DEFINE_WAIT(wait); | |
85d3fc94 | 1234 | long timeo = *timeop; |
9bbb4ecc YX |
1235 | int err; |
1236 | ||
1237 | for (;;) { | |
1238 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1239 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1240 | if (sock->state == SS_DISCONNECTING) { |
1241 | err = -ENOTCONN; | |
1242 | break; | |
1243 | } | |
1244 | release_sock(sk); | |
1245 | timeo = schedule_timeout(timeo); | |
1246 | lock_sock(sk); | |
1247 | } | |
1248 | err = 0; | |
1249 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1250 | break; | |
9bbb4ecc YX |
1251 | err = -EAGAIN; |
1252 | if (!timeo) | |
1253 | break; | |
143fe22f EH |
1254 | err = sock_intr_errno(timeo); |
1255 | if (signal_pending(current)) | |
1256 | break; | |
9bbb4ecc YX |
1257 | } |
1258 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1259 | *timeop = timeo; |
9bbb4ecc YX |
1260 | return err; |
1261 | } | |
1262 | ||
c4307285 | 1263 | /** |
247f0f3c | 1264 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1265 | * @m: descriptor for message info |
1266 | * @buf_len: total size of user buffer area | |
1267 | * @flags: receive flags | |
c4307285 | 1268 | * |
b97bf3fd PL |
1269 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1270 | * If the complete message doesn't fit in user area, truncate it. | |
1271 | * | |
1272 | * Returns size of returned message data, errno otherwise | |
1273 | */ | |
1b784140 YX |
1274 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1275 | int flags) | |
b97bf3fd | 1276 | { |
0c3141e9 | 1277 | struct sock *sk = sock->sk; |
58ed9442 | 1278 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1279 | struct sk_buff *buf; |
1280 | struct tipc_msg *msg; | |
9bbb4ecc | 1281 | long timeo; |
b97bf3fd PL |
1282 | unsigned int sz; |
1283 | u32 err; | |
1284 | int res; | |
1285 | ||
0c3141e9 | 1286 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1287 | if (unlikely(!buf_len)) |
1288 | return -EINVAL; | |
1289 | ||
0c3141e9 | 1290 | lock_sock(sk); |
b97bf3fd | 1291 | |
0c3141e9 AS |
1292 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1293 | res = -ENOTCONN; | |
b97bf3fd PL |
1294 | goto exit; |
1295 | } | |
1296 | ||
9bbb4ecc | 1297 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1298 | restart: |
b97bf3fd | 1299 | |
0c3141e9 | 1300 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1301 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1302 | if (res) |
1303 | goto exit; | |
b97bf3fd | 1304 | |
0c3141e9 | 1305 | /* Look at first message in receive queue */ |
0c3141e9 | 1306 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1307 | msg = buf_msg(buf); |
1308 | sz = msg_data_sz(msg); | |
1309 | err = msg_errcode(msg); | |
1310 | ||
b97bf3fd | 1311 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1312 | if ((!sz) && (!err)) { |
2e84c60b | 1313 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1314 | goto restart; |
1315 | } | |
1316 | ||
1317 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1318 | set_orig_addr(m, msg); |
1319 | ||
1320 | /* Capture ancillary data (optional) */ | |
301bae56 | 1321 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1322 | if (res) |
b97bf3fd PL |
1323 | goto exit; |
1324 | ||
1325 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1326 | if (!err) { |
1327 | if (unlikely(buf_len < sz)) { | |
1328 | sz = buf_len; | |
1329 | m->msg_flags |= MSG_TRUNC; | |
1330 | } | |
51f3d02b | 1331 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1332 | if (res) |
b97bf3fd | 1333 | goto exit; |
b97bf3fd PL |
1334 | res = sz; |
1335 | } else { | |
1336 | if ((sock->state == SS_READY) || | |
1337 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1338 | res = 0; | |
1339 | else | |
1340 | res = -ECONNRESET; | |
1341 | } | |
1342 | ||
1343 | /* Consume received message (optional) */ | |
b97bf3fd | 1344 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1345 | if ((sock->state != SS_READY) && |
60120526 | 1346 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1347 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1348 | tsk->rcv_unacked = 0; |
1349 | } | |
2e84c60b | 1350 | tsk_advance_rx_queue(sk); |
c4307285 | 1351 | } |
b97bf3fd | 1352 | exit: |
0c3141e9 | 1353 | release_sock(sk); |
b97bf3fd PL |
1354 | return res; |
1355 | } | |
1356 | ||
c4307285 | 1357 | /** |
247f0f3c | 1358 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1359 | * @m: descriptor for message info |
1360 | * @buf_len: total size of user buffer area | |
1361 | * @flags: receive flags | |
c4307285 YH |
1362 | * |
1363 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1364 | * will optionally wait for more; never truncates data. |
1365 | * | |
1366 | * Returns size of returned message data, errno otherwise | |
1367 | */ | |
1b784140 YX |
1368 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1369 | size_t buf_len, int flags) | |
b97bf3fd | 1370 | { |
0c3141e9 | 1371 | struct sock *sk = sock->sk; |
58ed9442 | 1372 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1373 | struct sk_buff *buf; |
1374 | struct tipc_msg *msg; | |
9bbb4ecc | 1375 | long timeo; |
b97bf3fd | 1376 | unsigned int sz; |
3720d40b | 1377 | int sz_to_copy, target, needed; |
b97bf3fd | 1378 | int sz_copied = 0; |
b97bf3fd | 1379 | u32 err; |
0c3141e9 | 1380 | int res = 0; |
b97bf3fd | 1381 | |
0c3141e9 | 1382 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1383 | if (unlikely(!buf_len)) |
1384 | return -EINVAL; | |
1385 | ||
0c3141e9 | 1386 | lock_sock(sk); |
b97bf3fd | 1387 | |
9bbb4ecc | 1388 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1389 | res = -ENOTCONN; |
b97bf3fd PL |
1390 | goto exit; |
1391 | } | |
1392 | ||
3720d40b | 1393 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1394 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1395 | |
617d3c7a | 1396 | restart: |
0c3141e9 | 1397 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1398 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1399 | if (res) |
1400 | goto exit; | |
b97bf3fd | 1401 | |
0c3141e9 | 1402 | /* Look at first message in receive queue */ |
0c3141e9 | 1403 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1404 | msg = buf_msg(buf); |
1405 | sz = msg_data_sz(msg); | |
1406 | err = msg_errcode(msg); | |
1407 | ||
1408 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1409 | if ((!sz) && (!err)) { |
2e84c60b | 1410 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1411 | goto restart; |
1412 | } | |
1413 | ||
1414 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1415 | if (sz_copied == 0) { |
1416 | set_orig_addr(m, msg); | |
301bae56 | 1417 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1418 | if (res) |
b97bf3fd PL |
1419 | goto exit; |
1420 | } | |
1421 | ||
1422 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1423 | if (!err) { |
0232fd0a | 1424 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1425 | |
0232fd0a | 1426 | sz -= offset; |
b97bf3fd PL |
1427 | needed = (buf_len - sz_copied); |
1428 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1429 | |
51f3d02b DM |
1430 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1431 | m, sz_to_copy); | |
0232fd0a | 1432 | if (res) |
b97bf3fd | 1433 | goto exit; |
0232fd0a | 1434 | |
b97bf3fd PL |
1435 | sz_copied += sz_to_copy; |
1436 | ||
1437 | if (sz_to_copy < sz) { | |
1438 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1439 | TIPC_SKB_CB(buf)->handle = |
1440 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1441 | goto exit; |
1442 | } | |
b97bf3fd PL |
1443 | } else { |
1444 | if (sz_copied != 0) | |
1445 | goto exit; /* can't add error msg to valid data */ | |
1446 | ||
1447 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1448 | res = 0; | |
1449 | else | |
1450 | res = -ECONNRESET; | |
1451 | } | |
1452 | ||
1453 | /* Consume received message (optional) */ | |
b97bf3fd | 1454 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1455 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1456 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1457 | tsk->rcv_unacked = 0; |
1458 | } | |
2e84c60b | 1459 | tsk_advance_rx_queue(sk); |
c4307285 | 1460 | } |
b97bf3fd PL |
1461 | |
1462 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1463 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1464 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1465 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1466 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1467 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1468 | goto restart; |
1469 | ||
1470 | exit: | |
0c3141e9 | 1471 | release_sock(sk); |
a3b0a5a9 | 1472 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1473 | } |
1474 | ||
f288bef4 YX |
1475 | /** |
1476 | * tipc_write_space - wake up thread if port congestion is released | |
1477 | * @sk: socket | |
1478 | */ | |
1479 | static void tipc_write_space(struct sock *sk) | |
1480 | { | |
1481 | struct socket_wq *wq; | |
1482 | ||
1483 | rcu_read_lock(); | |
1484 | wq = rcu_dereference(sk->sk_wq); | |
1485 | if (wq_has_sleeper(wq)) | |
1486 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1487 | POLLWRNORM | POLLWRBAND); | |
1488 | rcu_read_unlock(); | |
1489 | } | |
1490 | ||
1491 | /** | |
1492 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1493 | * @sk: socket | |
1494 | * @len: the length of messages | |
1495 | */ | |
676d2369 | 1496 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1497 | { |
1498 | struct socket_wq *wq; | |
1499 | ||
1500 | rcu_read_lock(); | |
1501 | wq = rcu_dereference(sk->sk_wq); | |
1502 | if (wq_has_sleeper(wq)) | |
1503 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1504 | POLLRDNORM | POLLRDBAND); | |
1505 | rcu_read_unlock(); | |
1506 | } | |
1507 | ||
7e6c131e YX |
1508 | /** |
1509 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1510 | * @tsk: TIPC socket |
1186adf7 | 1511 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1512 | * |
b2ad5e5f | 1513 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1514 | */ |
1186adf7 | 1515 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb) |
7e6c131e | 1516 | { |
58ed9442 | 1517 | struct sock *sk = &tsk->sk; |
f2f9800d | 1518 | struct net *net = sock_net(sk); |
8826cde6 | 1519 | struct socket *sock = sk->sk_socket; |
1186adf7 | 1520 | struct tipc_msg *msg = buf_msg(*skb); |
e4de5fab | 1521 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1522 | |
1523 | if (msg_mcast(msg)) | |
1524 | return retval; | |
1525 | ||
1526 | switch ((int)sock->state) { | |
1527 | case SS_CONNECTED: | |
1528 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1529 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1530 | if (unlikely(msg_errcode(msg))) { |
1531 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1532 | tsk->connected = 0; |
dadebc00 | 1533 | /* let timer expire on it's own */ |
f2f9800d | 1534 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
07f6c4bc | 1535 | tsk->portid); |
7e6c131e YX |
1536 | } |
1537 | retval = TIPC_OK; | |
1538 | } | |
1539 | break; | |
1540 | case SS_CONNECTING: | |
1541 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1542 | |
1543 | if (unlikely(!msg_connected(msg))) | |
1544 | break; | |
1545 | ||
584d24b3 YX |
1546 | if (unlikely(msg_errcode(msg))) { |
1547 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1548 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1549 | retval = TIPC_OK; |
1550 | break; | |
1551 | } | |
1552 | ||
dadebc00 | 1553 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1554 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1555 | sk->sk_err = EINVAL; |
7e6c131e | 1556 | retval = TIPC_OK; |
584d24b3 YX |
1557 | break; |
1558 | } | |
1559 | ||
301bae56 JPM |
1560 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1561 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1562 | sock->state = SS_CONNECTED; |
1563 | ||
584d24b3 YX |
1564 | /* If an incoming message is an 'ACK-', it should be |
1565 | * discarded here because it doesn't contain useful | |
1566 | * data. In addition, we should try to wake up | |
1567 | * connect() routine if sleeping. | |
1568 | */ | |
1569 | if (msg_data_sz(msg) == 0) { | |
1186adf7 JPM |
1570 | kfree_skb(*skb); |
1571 | *skb = NULL; | |
584d24b3 YX |
1572 | if (waitqueue_active(sk_sleep(sk))) |
1573 | wake_up_interruptible(sk_sleep(sk)); | |
1574 | } | |
1575 | retval = TIPC_OK; | |
7e6c131e YX |
1576 | break; |
1577 | case SS_LISTENING: | |
1578 | case SS_UNCONNECTED: | |
1579 | /* Accept only SYN message */ | |
1580 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1581 | retval = TIPC_OK; | |
1582 | break; | |
1583 | case SS_DISCONNECTING: | |
1584 | break; | |
1585 | default: | |
1586 | pr_err("Unknown socket state %u\n", sock->state); | |
1587 | } | |
1588 | return retval; | |
1589 | } | |
1590 | ||
aba79f33 YX |
1591 | /** |
1592 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1593 | * @sk: socket | |
1594 | * @buf: message | |
1595 | * | |
1596 | * For all connection oriented messages, irrespective of importance, | |
1597 | * the default overload value (i.e. 67MB) is set as limit. | |
1598 | * | |
1599 | * For all connectionless messages, by default new queue limits are | |
1600 | * as belows: | |
1601 | * | |
cc79dd1b YX |
1602 | * TIPC_LOW_IMPORTANCE (4 MB) |
1603 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1604 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1605 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1606 | * |
1607 | * Returns overload limit according to corresponding message importance | |
1608 | */ | |
1609 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1610 | { | |
1611 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1612 | |
1613 | if (msg_connected(msg)) | |
0cee6bbe | 1614 | return sysctl_tipc_rmem[2]; |
1615 | ||
1616 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1617 | msg_importance(msg); | |
aba79f33 YX |
1618 | } |
1619 | ||
c4307285 | 1620 | /** |
0c3141e9 AS |
1621 | * filter_rcv - validate incoming message |
1622 | * @sk: socket | |
1186adf7 | 1623 | * @skb: pointer to message. Set to NULL if buffer is consumed. |
c4307285 | 1624 | * |
0c3141e9 AS |
1625 | * Enqueues message on receive queue if acceptable; optionally handles |
1626 | * disconnect indication for a connected socket. | |
1627 | * | |
1186adf7 | 1628 | * Called with socket lock already taken |
c4307285 | 1629 | * |
1186adf7 | 1630 | * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected |
b97bf3fd | 1631 | */ |
1186adf7 | 1632 | static int filter_rcv(struct sock *sk, struct sk_buff **skb) |
b97bf3fd | 1633 | { |
0c3141e9 | 1634 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1635 | struct tipc_sock *tsk = tipc_sk(sk); |
1186adf7 JPM |
1636 | struct tipc_msg *msg = buf_msg(*skb); |
1637 | unsigned int limit = rcvbuf_limit(sk, *skb); | |
e4de5fab | 1638 | int rc = TIPC_OK; |
b97bf3fd | 1639 | |
1186adf7 JPM |
1640 | if (unlikely(msg_user(msg) == CONN_MANAGER)) { |
1641 | tipc_sk_proto_rcv(tsk, skb); | |
1642 | return TIPC_OK; | |
1643 | } | |
ec8a2e56 | 1644 | |
50100a5e | 1645 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1186adf7 | 1646 | kfree_skb(*skb); |
50100a5e JPM |
1647 | tsk->link_cong = 0; |
1648 | sk->sk_write_space(sk); | |
1186adf7 | 1649 | *skb = NULL; |
50100a5e JPM |
1650 | return TIPC_OK; |
1651 | } | |
1652 | ||
b97bf3fd | 1653 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1654 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1655 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1656 | |
b97bf3fd | 1657 | if (sock->state == SS_READY) { |
b29f1428 | 1658 | if (msg_connected(msg)) |
e4de5fab | 1659 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1660 | } else { |
1186adf7 JPM |
1661 | rc = filter_connect(tsk, skb); |
1662 | if (rc != TIPC_OK || !*skb) | |
e4de5fab | 1663 | return rc; |
b97bf3fd PL |
1664 | } |
1665 | ||
1666 | /* Reject message if there isn't room to queue it */ | |
1186adf7 | 1667 | if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit) |
e4de5fab | 1668 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1669 | |
aba79f33 | 1670 | /* Enqueue message */ |
1186adf7 JPM |
1671 | TIPC_SKB_CB(*skb)->handle = NULL; |
1672 | __skb_queue_tail(&sk->sk_receive_queue, *skb); | |
1673 | skb_set_owner_r(*skb, sk); | |
0c3141e9 | 1674 | |
676d2369 | 1675 | sk->sk_data_ready(sk); |
1186adf7 | 1676 | *skb = NULL; |
0c3141e9 AS |
1677 | return TIPC_OK; |
1678 | } | |
b97bf3fd | 1679 | |
0c3141e9 | 1680 | /** |
4f4482dc | 1681 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1682 | * @sk: socket |
a6ca1094 | 1683 | * @skb: message |
0c3141e9 | 1684 | * |
e3a77561 | 1685 | * Caller must hold socket lock |
0c3141e9 AS |
1686 | * |
1687 | * Returns 0 | |
1688 | */ | |
a6ca1094 | 1689 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1690 | { |
1186adf7 JPM |
1691 | int err; |
1692 | atomic_t *dcnt; | |
1693 | u32 dnode; | |
4f4482dc | 1694 | struct tipc_sock *tsk = tipc_sk(sk); |
34747539 | 1695 | struct net *net = sock_net(sk); |
a6ca1094 | 1696 | uint truesize = skb->truesize; |
0c3141e9 | 1697 | |
1186adf7 JPM |
1698 | err = filter_rcv(sk, &skb); |
1699 | if (likely(!skb)) { | |
1700 | dcnt = &tsk->dupl_rcvcnt; | |
1701 | if (atomic_read(dcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1702 | atomic_add(truesize, dcnt); | |
ac0074ee JPM |
1703 | return 0; |
1704 | } | |
1186adf7 JPM |
1705 | if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err)) |
1706 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); | |
0c3141e9 AS |
1707 | return 0; |
1708 | } | |
1709 | ||
d570d864 | 1710 | /** |
c637c103 JPM |
1711 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1712 | * inputq and try adding them to socket or backlog queue | |
1713 | * @inputq: list of incoming buffers with potentially different destinations | |
1714 | * @sk: socket where the buffers should be enqueued | |
1715 | * @dport: port number for the socket | |
1716 | * @_skb: returned buffer to be forwarded or rejected, if applicable | |
d570d864 JPM |
1717 | * |
1718 | * Caller must hold socket lock | |
1719 | * | |
c637c103 JPM |
1720 | * Returns TIPC_OK if all buffers enqueued, otherwise -TIPC_ERR_OVERLOAD |
1721 | * or -TIPC_ERR_NO_PORT | |
d570d864 | 1722 | */ |
c637c103 JPM |
1723 | static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1724 | u32 dport, struct sk_buff **_skb) | |
d570d864 JPM |
1725 | { |
1726 | unsigned int lim; | |
1727 | atomic_t *dcnt; | |
c637c103 JPM |
1728 | int err; |
1729 | struct sk_buff *skb; | |
1730 | unsigned long time_limit = jiffies + 2; | |
1731 | ||
1732 | while (skb_queue_len(inputq)) { | |
51a00daf JPM |
1733 | if (unlikely(time_after_eq(jiffies, time_limit))) |
1734 | return TIPC_OK; | |
c637c103 JPM |
1735 | skb = tipc_skb_dequeue(inputq, dport); |
1736 | if (unlikely(!skb)) | |
1737 | return TIPC_OK; | |
c637c103 JPM |
1738 | if (!sock_owned_by_user(sk)) { |
1739 | err = filter_rcv(sk, &skb); | |
1740 | if (likely(!skb)) | |
1741 | continue; | |
1742 | *_skb = skb; | |
1743 | return err; | |
1744 | } | |
1745 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
1746 | if (sk->sk_backlog.len) | |
1747 | atomic_set(dcnt, 0); | |
1748 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1749 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1750 | continue; | |
1751 | *_skb = skb; | |
d570d864 | 1752 | return -TIPC_ERR_OVERLOAD; |
c637c103 | 1753 | } |
d570d864 JPM |
1754 | return TIPC_OK; |
1755 | } | |
1756 | ||
0c3141e9 | 1757 | /** |
c637c103 JPM |
1758 | * tipc_sk_rcv - handle a chain of incoming buffers |
1759 | * @inputq: buffer list containing the buffers | |
1760 | * Consumes all buffers in list until inputq is empty | |
1761 | * Note: may be called in multiple threads referring to the same queue | |
1762 | * Returns 0 if last buffer was accepted, otherwise -EHOSTUNREACH | |
1763 | * Only node local calls check the return value, sending single-buffer queues | |
0c3141e9 | 1764 | */ |
c637c103 | 1765 | int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1766 | { |
c637c103 | 1767 | u32 dnode, dport = 0; |
9871b27f | 1768 | int err; |
c637c103 | 1769 | struct sk_buff *skb; |
9816f061 | 1770 | struct tipc_sock *tsk; |
c5898636 | 1771 | struct tipc_net *tn; |
9816f061 | 1772 | struct sock *sk; |
9816f061 | 1773 | |
c637c103 | 1774 | while (skb_queue_len(inputq)) { |
9871b27f | 1775 | err = -TIPC_ERR_NO_PORT; |
c637c103 JPM |
1776 | skb = NULL; |
1777 | dport = tipc_skb_peek_port(inputq, dport); | |
1778 | tsk = tipc_sk_lookup(net, dport); | |
1779 | if (likely(tsk)) { | |
1780 | sk = &tsk->sk; | |
1781 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
1782 | err = tipc_sk_enqueue(inputq, sk, dport, &skb); | |
1783 | spin_unlock_bh(&sk->sk_lock.slock); | |
1784 | dport = 0; | |
1785 | } | |
1786 | sock_put(sk); | |
1787 | } else { | |
1788 | skb = tipc_skb_dequeue(inputq, dport); | |
1789 | } | |
1790 | if (likely(!skb)) | |
1791 | continue; | |
1792 | if (tipc_msg_lookup_dest(net, skb, &dnode, &err)) | |
1793 | goto xmit; | |
1794 | if (!err) { | |
1795 | dnode = msg_destnode(buf_msg(skb)); | |
1796 | goto xmit; | |
1797 | } | |
1798 | tn = net_generic(net, tipc_net_id); | |
1799 | if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err)) | |
1800 | continue; | |
e3a77561 | 1801 | xmit: |
c637c103 JPM |
1802 | tipc_link_xmit_skb(net, skb, dnode, dport); |
1803 | } | |
1186adf7 | 1804 | return err ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1805 | } |
1806 | ||
78eb3a53 YX |
1807 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1808 | { | |
1809 | struct sock *sk = sock->sk; | |
1810 | DEFINE_WAIT(wait); | |
1811 | int done; | |
1812 | ||
1813 | do { | |
1814 | int err = sock_error(sk); | |
1815 | if (err) | |
1816 | return err; | |
1817 | if (!*timeo_p) | |
1818 | return -ETIMEDOUT; | |
1819 | if (signal_pending(current)) | |
1820 | return sock_intr_errno(*timeo_p); | |
1821 | ||
1822 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1823 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1824 | finish_wait(sk_sleep(sk), &wait); | |
1825 | } while (!done); | |
1826 | return 0; | |
1827 | } | |
1828 | ||
b97bf3fd | 1829 | /** |
247f0f3c | 1830 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1831 | * @sock: socket structure |
1832 | * @dest: socket address for destination port | |
1833 | * @destlen: size of socket address data structure | |
0c3141e9 | 1834 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1835 | * |
1836 | * Returns 0 on success, errno otherwise | |
1837 | */ | |
247f0f3c YX |
1838 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1839 | int destlen, int flags) | |
b97bf3fd | 1840 | { |
0c3141e9 | 1841 | struct sock *sk = sock->sk; |
f2f8036e | 1842 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1843 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1844 | struct msghdr m = {NULL,}; | |
f2f8036e | 1845 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1846 | socket_state previous; |
f2f8036e | 1847 | int res = 0; |
b89741a0 | 1848 | |
0c3141e9 AS |
1849 | lock_sock(sk); |
1850 | ||
f2f8036e | 1851 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1852 | if (sock->state == SS_READY) { |
f2f8036e EH |
1853 | if (dst->family == AF_UNSPEC) { |
1854 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); | |
1855 | tsk->connected = 0; | |
610600c8 SL |
1856 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1857 | res = -EINVAL; | |
f2f8036e EH |
1858 | } else { |
1859 | memcpy(&tsk->remote, dest, destlen); | |
1860 | tsk->connected = 1; | |
1861 | } | |
0c3141e9 AS |
1862 | goto exit; |
1863 | } | |
b89741a0 | 1864 | |
b89741a0 AS |
1865 | /* |
1866 | * Reject connection attempt using multicast address | |
1867 | * | |
1868 | * Note: send_msg() validates the rest of the address fields, | |
1869 | * so there's no need to do it here | |
1870 | */ | |
0c3141e9 AS |
1871 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1872 | res = -EINVAL; | |
1873 | goto exit; | |
1874 | } | |
1875 | ||
78eb3a53 | 1876 | previous = sock->state; |
584d24b3 YX |
1877 | switch (sock->state) { |
1878 | case SS_UNCONNECTED: | |
1879 | /* Send a 'SYN-' to destination */ | |
1880 | m.msg_name = dest; | |
1881 | m.msg_namelen = destlen; | |
1882 | ||
1883 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1884 | * indicate send_msg() is never blocked. | |
1885 | */ | |
1886 | if (!timeout) | |
1887 | m.msg_flags = MSG_DONTWAIT; | |
1888 | ||
39a0295f | 1889 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1890 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1891 | goto exit; | |
1892 | ||
1893 | /* Just entered SS_CONNECTING state; the only | |
1894 | * difference is that return value in non-blocking | |
1895 | * case is EINPROGRESS, rather than EALREADY. | |
1896 | */ | |
1897 | res = -EINPROGRESS; | |
584d24b3 | 1898 | case SS_CONNECTING: |
78eb3a53 YX |
1899 | if (previous == SS_CONNECTING) |
1900 | res = -EALREADY; | |
1901 | if (!timeout) | |
1902 | goto exit; | |
1903 | timeout = msecs_to_jiffies(timeout); | |
1904 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1905 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1906 | break; |
1907 | case SS_CONNECTED: | |
1908 | res = -EISCONN; | |
1909 | break; | |
1910 | default: | |
1911 | res = -EINVAL; | |
78eb3a53 | 1912 | break; |
b89741a0 | 1913 | } |
0c3141e9 AS |
1914 | exit: |
1915 | release_sock(sk); | |
b89741a0 | 1916 | return res; |
b97bf3fd PL |
1917 | } |
1918 | ||
c4307285 | 1919 | /** |
247f0f3c | 1920 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1921 | * @sock: socket structure |
1922 | * @len: (unused) | |
c4307285 | 1923 | * |
b97bf3fd PL |
1924 | * Returns 0 on success, errno otherwise |
1925 | */ | |
247f0f3c | 1926 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1927 | { |
0c3141e9 AS |
1928 | struct sock *sk = sock->sk; |
1929 | int res; | |
1930 | ||
1931 | lock_sock(sk); | |
b97bf3fd | 1932 | |
245f3d34 | 1933 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1934 | res = -EINVAL; |
1935 | else { | |
1936 | sock->state = SS_LISTENING; | |
1937 | res = 0; | |
1938 | } | |
1939 | ||
1940 | release_sock(sk); | |
1941 | return res; | |
b97bf3fd PL |
1942 | } |
1943 | ||
6398e23c YX |
1944 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1945 | { | |
1946 | struct sock *sk = sock->sk; | |
1947 | DEFINE_WAIT(wait); | |
1948 | int err; | |
1949 | ||
1950 | /* True wake-one mechanism for incoming connections: only | |
1951 | * one process gets woken up, not the 'whole herd'. | |
1952 | * Since we do not 'race & poll' for established sockets | |
1953 | * anymore, the common case will execute the loop only once. | |
1954 | */ | |
1955 | for (;;) { | |
1956 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1957 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1958 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1959 | release_sock(sk); |
1960 | timeo = schedule_timeout(timeo); | |
1961 | lock_sock(sk); | |
1962 | } | |
1963 | err = 0; | |
1964 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1965 | break; | |
1966 | err = -EINVAL; | |
1967 | if (sock->state != SS_LISTENING) | |
1968 | break; | |
6398e23c YX |
1969 | err = -EAGAIN; |
1970 | if (!timeo) | |
1971 | break; | |
143fe22f EH |
1972 | err = sock_intr_errno(timeo); |
1973 | if (signal_pending(current)) | |
1974 | break; | |
6398e23c YX |
1975 | } |
1976 | finish_wait(sk_sleep(sk), &wait); | |
1977 | return err; | |
1978 | } | |
1979 | ||
c4307285 | 1980 | /** |
247f0f3c | 1981 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1982 | * @sock: listening socket |
1983 | * @newsock: new socket that is to be connected | |
1984 | * @flags: file-related flags associated with socket | |
c4307285 | 1985 | * |
b97bf3fd PL |
1986 | * Returns 0 on success, errno otherwise |
1987 | */ | |
247f0f3c | 1988 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1989 | { |
0fef8f20 | 1990 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1991 | struct sk_buff *buf; |
301bae56 | 1992 | struct tipc_sock *new_tsock; |
0fef8f20 | 1993 | struct tipc_msg *msg; |
6398e23c | 1994 | long timeo; |
0c3141e9 | 1995 | int res; |
b97bf3fd | 1996 | |
0c3141e9 | 1997 | lock_sock(sk); |
b97bf3fd | 1998 | |
0c3141e9 AS |
1999 | if (sock->state != SS_LISTENING) { |
2000 | res = -EINVAL; | |
b97bf3fd PL |
2001 | goto exit; |
2002 | } | |
6398e23c YX |
2003 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2004 | res = tipc_wait_for_accept(sock, timeo); | |
2005 | if (res) | |
2006 | goto exit; | |
0c3141e9 AS |
2007 | |
2008 | buf = skb_peek(&sk->sk_receive_queue); | |
2009 | ||
c5fa7b3c | 2010 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2011 | if (res) |
2012 | goto exit; | |
b97bf3fd | 2013 | |
0fef8f20 | 2014 | new_sk = new_sock->sk; |
301bae56 | 2015 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2016 | msg = buf_msg(buf); |
b97bf3fd | 2017 | |
0fef8f20 PG |
2018 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2019 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2020 | ||
2021 | /* | |
2022 | * Reject any stray messages received by new socket | |
2023 | * before the socket lock was taken (very, very unlikely) | |
2024 | */ | |
2e84c60b | 2025 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2026 | |
2027 | /* Connect new socket to it's peer */ | |
301bae56 | 2028 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2029 | new_sock->state = SS_CONNECTED; |
2030 | ||
301bae56 | 2031 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2032 | if (msg_named(msg)) { |
301bae56 JPM |
2033 | new_tsock->conn_type = msg_nametype(msg); |
2034 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2035 | } |
0fef8f20 PG |
2036 | |
2037 | /* | |
2038 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2039 | * Respond to 'SYN+' by queuing it on new socket. | |
2040 | */ | |
2041 | if (!msg_data_sz(msg)) { | |
2042 | struct msghdr m = {NULL,}; | |
2043 | ||
2e84c60b | 2044 | tsk_advance_rx_queue(sk); |
39a0295f | 2045 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2046 | } else { |
2047 | __skb_dequeue(&sk->sk_receive_queue); | |
2048 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2049 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2050 | } |
2051 | release_sock(new_sk); | |
b97bf3fd | 2052 | exit: |
0c3141e9 | 2053 | release_sock(sk); |
b97bf3fd PL |
2054 | return res; |
2055 | } | |
2056 | ||
2057 | /** | |
247f0f3c | 2058 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2059 | * @sock: socket structure |
e247a8f5 | 2060 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2061 | * |
2062 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2063 | * |
b97bf3fd PL |
2064 | * Returns 0 on success, errno otherwise |
2065 | */ | |
247f0f3c | 2066 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2067 | { |
0c3141e9 | 2068 | struct sock *sk = sock->sk; |
f2f9800d | 2069 | struct net *net = sock_net(sk); |
58ed9442 | 2070 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2071 | struct sk_buff *skb; |
80e44c22 | 2072 | u32 dnode; |
b97bf3fd PL |
2073 | int res; |
2074 | ||
e247a8f5 AS |
2075 | if (how != SHUT_RDWR) |
2076 | return -EINVAL; | |
b97bf3fd | 2077 | |
0c3141e9 | 2078 | lock_sock(sk); |
b97bf3fd PL |
2079 | |
2080 | switch (sock->state) { | |
0c3141e9 | 2081 | case SS_CONNECTING: |
b97bf3fd PL |
2082 | case SS_CONNECTED: |
2083 | ||
b97bf3fd | 2084 | restart: |
617d3c7a | 2085 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2086 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2087 | if (skb) { | |
2088 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2089 | kfree_skb(skb); | |
b97bf3fd PL |
2090 | goto restart; |
2091 | } | |
c5898636 | 2092 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 2093 | TIPC_CONN_SHUTDOWN)) |
f2f9800d YX |
2094 | tipc_link_xmit_skb(net, skb, dnode, |
2095 | tsk->portid); | |
0c3141e9 | 2096 | } else { |
301bae56 | 2097 | dnode = tsk_peer_node(tsk); |
c5898636 JPM |
2098 | |
2099 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
80e44c22 | 2100 | TIPC_CONN_MSG, SHORT_H_SIZE, |
c5898636 | 2101 | 0, dnode, tsk_own_node(tsk), |
301bae56 | 2102 | tsk_peer_port(tsk), |
07f6c4bc | 2103 | tsk->portid, TIPC_CONN_SHUTDOWN); |
f2f9800d | 2104 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2105 | } |
301bae56 | 2106 | tsk->connected = 0; |
0c3141e9 | 2107 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2108 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2109 | /* fall through */ |
2110 | ||
2111 | case SS_DISCONNECTING: | |
2112 | ||
75031151 | 2113 | /* Discard any unreceived messages */ |
57467e56 | 2114 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2115 | |
2116 | /* Wake up anyone sleeping in poll */ | |
2117 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2118 | res = 0; |
2119 | break; | |
2120 | ||
2121 | default: | |
2122 | res = -ENOTCONN; | |
2123 | } | |
2124 | ||
0c3141e9 | 2125 | release_sock(sk); |
b97bf3fd PL |
2126 | return res; |
2127 | } | |
2128 | ||
f2f2a96a | 2129 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2130 | { |
f2f2a96a YX |
2131 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2132 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2133 | struct sk_buff *skb = NULL; |
57289015 | 2134 | u32 peer_port, peer_node; |
c5898636 | 2135 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2136 | |
6c9808ce | 2137 | bh_lock_sock(sk); |
301bae56 | 2138 | if (!tsk->connected) { |
6c9808ce JPM |
2139 | bh_unlock_sock(sk); |
2140 | goto exit; | |
57289015 | 2141 | } |
301bae56 JPM |
2142 | peer_port = tsk_peer_port(tsk); |
2143 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2144 | |
301bae56 | 2145 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
57289015 | 2146 | /* Previous probe not answered -> self abort */ |
c5898636 | 2147 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 2148 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, |
c5898636 | 2149 | own_node, peer_node, tsk->portid, |
34747539 | 2150 | peer_port, TIPC_ERR_NO_PORT); |
57289015 | 2151 | } else { |
c5898636 JPM |
2152 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2153 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2154 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2155 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2156 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2157 | } |
2158 | bh_unlock_sock(sk); | |
a6ca1094 | 2159 | if (skb) |
f2f9800d | 2160 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2161 | exit: |
07f6c4bc | 2162 | sock_put(sk); |
57289015 JPM |
2163 | } |
2164 | ||
301bae56 | 2165 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2166 | struct tipc_name_seq const *seq) |
2167 | { | |
f2f9800d | 2168 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2169 | struct publication *publ; |
2170 | u32 key; | |
2171 | ||
301bae56 | 2172 | if (tsk->connected) |
0fc87aae | 2173 | return -EINVAL; |
07f6c4bc YX |
2174 | key = tsk->portid + tsk->pub_count + 1; |
2175 | if (key == tsk->portid) | |
0fc87aae JPM |
2176 | return -EADDRINUSE; |
2177 | ||
f2f9800d | 2178 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2179 | scope, tsk->portid, key); |
0fc87aae JPM |
2180 | if (unlikely(!publ)) |
2181 | return -EINVAL; | |
2182 | ||
301bae56 JPM |
2183 | list_add(&publ->pport_list, &tsk->publications); |
2184 | tsk->pub_count++; | |
2185 | tsk->published = 1; | |
0fc87aae JPM |
2186 | return 0; |
2187 | } | |
2188 | ||
301bae56 | 2189 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2190 | struct tipc_name_seq const *seq) |
2191 | { | |
f2f9800d | 2192 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2193 | struct publication *publ; |
2194 | struct publication *safe; | |
2195 | int rc = -EINVAL; | |
2196 | ||
301bae56 | 2197 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2198 | if (seq) { |
2199 | if (publ->scope != scope) | |
2200 | continue; | |
2201 | if (publ->type != seq->type) | |
2202 | continue; | |
2203 | if (publ->lower != seq->lower) | |
2204 | continue; | |
2205 | if (publ->upper != seq->upper) | |
2206 | break; | |
f2f9800d | 2207 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2208 | publ->ref, publ->key); |
2209 | rc = 0; | |
2210 | break; | |
2211 | } | |
f2f9800d | 2212 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2213 | publ->ref, publ->key); |
2214 | rc = 0; | |
2215 | } | |
301bae56 JPM |
2216 | if (list_empty(&tsk->publications)) |
2217 | tsk->published = 0; | |
0fc87aae JPM |
2218 | return rc; |
2219 | } | |
2220 | ||
5a9ee0be JPM |
2221 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2222 | * when we go from standalone to network mode. | |
2223 | */ | |
e05b31f4 | 2224 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2225 | { |
e05b31f4 | 2226 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2227 | const struct bucket_table *tbl; |
2228 | struct rhash_head *pos; | |
2229 | struct tipc_sock *tsk; | |
5a9ee0be | 2230 | struct tipc_msg *msg; |
07f6c4bc | 2231 | int i; |
5a9ee0be | 2232 | |
07f6c4bc | 2233 | rcu_read_lock(); |
e05b31f4 | 2234 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2235 | for (i = 0; i < tbl->size; i++) { |
2236 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2237 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2238 | msg = &tsk->phdr; | |
34747539 YX |
2239 | msg_set_prevnode(msg, tn->own_addr); |
2240 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2241 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2242 | } | |
5a9ee0be | 2243 | } |
07f6c4bc | 2244 | rcu_read_unlock(); |
5a9ee0be JPM |
2245 | } |
2246 | ||
e05b31f4 | 2247 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2248 | { |
e05b31f4 | 2249 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2250 | struct tipc_sock *tsk; |
808d90f9 | 2251 | |
07f6c4bc | 2252 | rcu_read_lock(); |
6cca7289 | 2253 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2254 | if (tsk) |
2255 | sock_hold(&tsk->sk); | |
2256 | rcu_read_unlock(); | |
808d90f9 | 2257 | |
07f6c4bc | 2258 | return tsk; |
808d90f9 JPM |
2259 | } |
2260 | ||
07f6c4bc | 2261 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2262 | { |
e05b31f4 YX |
2263 | struct sock *sk = &tsk->sk; |
2264 | struct net *net = sock_net(sk); | |
2265 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2266 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2267 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2268 | |
07f6c4bc YX |
2269 | while (remaining--) { |
2270 | portid++; | |
2271 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2272 | portid = TIPC_MIN_PORT; | |
2273 | tsk->portid = portid; | |
2274 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2275 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2276 | tsk_rht_params)) | |
07f6c4bc YX |
2277 | return 0; |
2278 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2279 | } |
2280 | ||
07f6c4bc | 2281 | return -1; |
808d90f9 JPM |
2282 | } |
2283 | ||
07f6c4bc | 2284 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2285 | { |
07f6c4bc | 2286 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2287 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2288 | |
6cca7289 | 2289 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2290 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2291 | __sock_put(sk); | |
808d90f9 | 2292 | } |
808d90f9 JPM |
2293 | } |
2294 | ||
6cca7289 HX |
2295 | static const struct rhashtable_params tsk_rht_params = { |
2296 | .nelem_hint = 192, | |
2297 | .head_offset = offsetof(struct tipc_sock, node), | |
2298 | .key_offset = offsetof(struct tipc_sock, portid), | |
2299 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2300 | .max_size = 1048576, |
2301 | .min_size = 256, | |
b5e2c150 | 2302 | .automatic_shrinking = true, |
6cca7289 HX |
2303 | }; |
2304 | ||
e05b31f4 | 2305 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2306 | { |
e05b31f4 | 2307 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2308 | |
2309 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2310 | } |
2311 | ||
e05b31f4 | 2312 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2313 | { |
e05b31f4 YX |
2314 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2315 | ||
07f6c4bc YX |
2316 | /* Wait for socket readers to complete */ |
2317 | synchronize_net(); | |
808d90f9 | 2318 | |
e05b31f4 | 2319 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2320 | } |
2321 | ||
b97bf3fd | 2322 | /** |
247f0f3c | 2323 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2324 | * @sock: socket structure |
2325 | * @lvl: option level | |
2326 | * @opt: option identifier | |
2327 | * @ov: pointer to new option value | |
2328 | * @ol: length of option value | |
c4307285 YH |
2329 | * |
2330 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2331 | * (to ease compatibility). |
c4307285 | 2332 | * |
b97bf3fd PL |
2333 | * Returns 0 on success, errno otherwise |
2334 | */ | |
247f0f3c YX |
2335 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2336 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2337 | { |
0c3141e9 | 2338 | struct sock *sk = sock->sk; |
58ed9442 | 2339 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2340 | u32 value; |
2341 | int res; | |
2342 | ||
c4307285 YH |
2343 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2344 | return 0; | |
b97bf3fd PL |
2345 | if (lvl != SOL_TIPC) |
2346 | return -ENOPROTOOPT; | |
2347 | if (ol < sizeof(value)) | |
2348 | return -EINVAL; | |
2db9983a AS |
2349 | res = get_user(value, (u32 __user *)ov); |
2350 | if (res) | |
b97bf3fd PL |
2351 | return res; |
2352 | ||
0c3141e9 | 2353 | lock_sock(sk); |
c4307285 | 2354 | |
b97bf3fd PL |
2355 | switch (opt) { |
2356 | case TIPC_IMPORTANCE: | |
301bae56 | 2357 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2358 | break; |
2359 | case TIPC_SRC_DROPPABLE: | |
2360 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2361 | tsk_set_unreliable(tsk, value); |
c4307285 | 2362 | else |
b97bf3fd PL |
2363 | res = -ENOPROTOOPT; |
2364 | break; | |
2365 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2366 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2367 | break; |
2368 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2369 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2370 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2371 | break; |
2372 | default: | |
2373 | res = -EINVAL; | |
2374 | } | |
2375 | ||
0c3141e9 AS |
2376 | release_sock(sk); |
2377 | ||
b97bf3fd PL |
2378 | return res; |
2379 | } | |
2380 | ||
2381 | /** | |
247f0f3c | 2382 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2383 | * @sock: socket structure |
2384 | * @lvl: option level | |
2385 | * @opt: option identifier | |
2386 | * @ov: receptacle for option value | |
2387 | * @ol: receptacle for length of option value | |
c4307285 YH |
2388 | * |
2389 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2390 | * (to ease compatibility). |
c4307285 | 2391 | * |
b97bf3fd PL |
2392 | * Returns 0 on success, errno otherwise |
2393 | */ | |
247f0f3c YX |
2394 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2395 | char __user *ov, int __user *ol) | |
b97bf3fd | 2396 | { |
0c3141e9 | 2397 | struct sock *sk = sock->sk; |
58ed9442 | 2398 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2399 | int len; |
b97bf3fd | 2400 | u32 value; |
c4307285 | 2401 | int res; |
b97bf3fd | 2402 | |
c4307285 YH |
2403 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2404 | return put_user(0, ol); | |
b97bf3fd PL |
2405 | if (lvl != SOL_TIPC) |
2406 | return -ENOPROTOOPT; | |
2db9983a AS |
2407 | res = get_user(len, ol); |
2408 | if (res) | |
c4307285 | 2409 | return res; |
b97bf3fd | 2410 | |
0c3141e9 | 2411 | lock_sock(sk); |
b97bf3fd PL |
2412 | |
2413 | switch (opt) { | |
2414 | case TIPC_IMPORTANCE: | |
301bae56 | 2415 | value = tsk_importance(tsk); |
b97bf3fd PL |
2416 | break; |
2417 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2418 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2419 | break; |
2420 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2421 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2422 | break; |
2423 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2424 | value = tsk->conn_timeout; |
0c3141e9 | 2425 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2426 | break; |
0e65967e | 2427 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2428 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2429 | break; |
0e65967e | 2430 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2431 | value = skb_queue_len(&sk->sk_receive_queue); |
2432 | break; | |
b97bf3fd PL |
2433 | default: |
2434 | res = -EINVAL; | |
2435 | } | |
2436 | ||
0c3141e9 AS |
2437 | release_sock(sk); |
2438 | ||
25860c3b PG |
2439 | if (res) |
2440 | return res; /* "get" failed */ | |
b97bf3fd | 2441 | |
25860c3b PG |
2442 | if (len < sizeof(value)) |
2443 | return -EINVAL; | |
2444 | ||
2445 | if (copy_to_user(ov, &value, sizeof(value))) | |
2446 | return -EFAULT; | |
2447 | ||
2448 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2449 | } |
2450 | ||
f2f9800d | 2451 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2452 | { |
f2f9800d | 2453 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2454 | struct tipc_sioc_ln_req lnr; |
2455 | void __user *argp = (void __user *)arg; | |
2456 | ||
2457 | switch (cmd) { | |
2458 | case SIOCGETLINKNAME: | |
2459 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2460 | return -EFAULT; | |
f2f9800d YX |
2461 | if (!tipc_node_get_linkname(sock_net(sk), |
2462 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2463 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2464 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2465 | return -EFAULT; | |
2466 | return 0; | |
2467 | } | |
2468 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2469 | default: |
2470 | return -ENOIOCTLCMD; | |
2471 | } | |
2472 | } | |
2473 | ||
ae86b9e3 BH |
2474 | /* Protocol switches for the various types of TIPC sockets */ |
2475 | ||
bca65eae | 2476 | static const struct proto_ops msg_ops = { |
0e65967e | 2477 | .owner = THIS_MODULE, |
b97bf3fd | 2478 | .family = AF_TIPC, |
247f0f3c YX |
2479 | .release = tipc_release, |
2480 | .bind = tipc_bind, | |
2481 | .connect = tipc_connect, | |
5eee6a6d | 2482 | .socketpair = sock_no_socketpair, |
245f3d34 | 2483 | .accept = sock_no_accept, |
247f0f3c YX |
2484 | .getname = tipc_getname, |
2485 | .poll = tipc_poll, | |
78acb1f9 | 2486 | .ioctl = tipc_ioctl, |
245f3d34 | 2487 | .listen = sock_no_listen, |
247f0f3c YX |
2488 | .shutdown = tipc_shutdown, |
2489 | .setsockopt = tipc_setsockopt, | |
2490 | .getsockopt = tipc_getsockopt, | |
2491 | .sendmsg = tipc_sendmsg, | |
2492 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2493 | .mmap = sock_no_mmap, |
2494 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2495 | }; |
2496 | ||
bca65eae | 2497 | static const struct proto_ops packet_ops = { |
0e65967e | 2498 | .owner = THIS_MODULE, |
b97bf3fd | 2499 | .family = AF_TIPC, |
247f0f3c YX |
2500 | .release = tipc_release, |
2501 | .bind = tipc_bind, | |
2502 | .connect = tipc_connect, | |
5eee6a6d | 2503 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2504 | .accept = tipc_accept, |
2505 | .getname = tipc_getname, | |
2506 | .poll = tipc_poll, | |
78acb1f9 | 2507 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2508 | .listen = tipc_listen, |
2509 | .shutdown = tipc_shutdown, | |
2510 | .setsockopt = tipc_setsockopt, | |
2511 | .getsockopt = tipc_getsockopt, | |
2512 | .sendmsg = tipc_send_packet, | |
2513 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2514 | .mmap = sock_no_mmap, |
2515 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2516 | }; |
2517 | ||
bca65eae | 2518 | static const struct proto_ops stream_ops = { |
0e65967e | 2519 | .owner = THIS_MODULE, |
b97bf3fd | 2520 | .family = AF_TIPC, |
247f0f3c YX |
2521 | .release = tipc_release, |
2522 | .bind = tipc_bind, | |
2523 | .connect = tipc_connect, | |
5eee6a6d | 2524 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2525 | .accept = tipc_accept, |
2526 | .getname = tipc_getname, | |
2527 | .poll = tipc_poll, | |
78acb1f9 | 2528 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2529 | .listen = tipc_listen, |
2530 | .shutdown = tipc_shutdown, | |
2531 | .setsockopt = tipc_setsockopt, | |
2532 | .getsockopt = tipc_getsockopt, | |
2533 | .sendmsg = tipc_send_stream, | |
2534 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2535 | .mmap = sock_no_mmap, |
2536 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2537 | }; |
2538 | ||
bca65eae | 2539 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2540 | .owner = THIS_MODULE, |
b97bf3fd | 2541 | .family = AF_TIPC, |
c5fa7b3c | 2542 | .create = tipc_sk_create |
b97bf3fd PL |
2543 | }; |
2544 | ||
2545 | static struct proto tipc_proto = { | |
2546 | .name = "TIPC", | |
2547 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2548 | .obj_size = sizeof(struct tipc_sock), |
2549 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2550 | }; |
2551 | ||
2552 | /** | |
4323add6 | 2553 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2554 | * |
b97bf3fd PL |
2555 | * Returns 0 on success, errno otherwise |
2556 | */ | |
4323add6 | 2557 | int tipc_socket_init(void) |
b97bf3fd PL |
2558 | { |
2559 | int res; | |
2560 | ||
c4307285 | 2561 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2562 | if (res) { |
2cf8aa19 | 2563 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2564 | goto out; |
2565 | } | |
2566 | ||
2567 | res = sock_register(&tipc_family_ops); | |
2568 | if (res) { | |
2cf8aa19 | 2569 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2570 | proto_unregister(&tipc_proto); |
2571 | goto out; | |
2572 | } | |
b97bf3fd PL |
2573 | out: |
2574 | return res; | |
2575 | } | |
2576 | ||
2577 | /** | |
4323add6 | 2578 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2579 | */ |
4323add6 | 2580 | void tipc_socket_stop(void) |
b97bf3fd | 2581 | { |
b97bf3fd PL |
2582 | sock_unregister(tipc_family_ops.family); |
2583 | proto_unregister(&tipc_proto); | |
2584 | } | |
34b78a12 RA |
2585 | |
2586 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2587 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2588 | { |
2589 | u32 peer_node; | |
2590 | u32 peer_port; | |
2591 | struct nlattr *nest; | |
2592 | ||
2593 | peer_node = tsk_peer_node(tsk); | |
2594 | peer_port = tsk_peer_port(tsk); | |
2595 | ||
2596 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2597 | ||
2598 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2599 | goto msg_full; | |
2600 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2601 | goto msg_full; | |
2602 | ||
2603 | if (tsk->conn_type != 0) { | |
2604 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2605 | goto msg_full; | |
2606 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2607 | goto msg_full; | |
2608 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2609 | goto msg_full; | |
2610 | } | |
2611 | nla_nest_end(skb, nest); | |
2612 | ||
2613 | return 0; | |
2614 | ||
2615 | msg_full: | |
2616 | nla_nest_cancel(skb, nest); | |
2617 | ||
2618 | return -EMSGSIZE; | |
2619 | } | |
2620 | ||
2621 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2622 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2623 | struct tipc_sock *tsk) | |
34b78a12 RA |
2624 | { |
2625 | int err; | |
2626 | void *hdr; | |
2627 | struct nlattr *attrs; | |
34747539 YX |
2628 | struct net *net = sock_net(skb->sk); |
2629 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2630 | |
2631 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2632 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2633 | if (!hdr) |
2634 | goto msg_cancel; | |
2635 | ||
2636 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2637 | if (!attrs) | |
2638 | goto genlmsg_cancel; | |
07f6c4bc | 2639 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2640 | goto attr_msg_cancel; |
34747539 | 2641 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2642 | goto attr_msg_cancel; |
2643 | ||
2644 | if (tsk->connected) { | |
2645 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2646 | if (err) | |
2647 | goto attr_msg_cancel; | |
2648 | } else if (!list_empty(&tsk->publications)) { | |
2649 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2650 | goto attr_msg_cancel; | |
2651 | } | |
2652 | nla_nest_end(skb, attrs); | |
2653 | genlmsg_end(skb, hdr); | |
2654 | ||
2655 | return 0; | |
2656 | ||
2657 | attr_msg_cancel: | |
2658 | nla_nest_cancel(skb, attrs); | |
2659 | genlmsg_cancel: | |
2660 | genlmsg_cancel(skb, hdr); | |
2661 | msg_cancel: | |
2662 | return -EMSGSIZE; | |
2663 | } | |
2664 | ||
2665 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2666 | { | |
2667 | int err; | |
2668 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2669 | const struct bucket_table *tbl; |
2670 | struct rhash_head *pos; | |
e05b31f4 YX |
2671 | struct net *net = sock_net(skb->sk); |
2672 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2673 | u32 tbl_id = cb->args[0]; |
2674 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2675 | |
07f6c4bc | 2676 | rcu_read_lock(); |
e05b31f4 | 2677 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2678 | for (; tbl_id < tbl->size; tbl_id++) { |
2679 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2680 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2681 | if (prev_portid && prev_portid != tsk->portid) { |
2682 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2683 | continue; | |
2684 | } | |
2685 | ||
07f6c4bc | 2686 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2687 | if (err) { |
2688 | prev_portid = tsk->portid; | |
2689 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2690 | goto out; | |
2691 | } | |
2692 | prev_portid = 0; | |
07f6c4bc | 2693 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2694 | } |
34b78a12 | 2695 | } |
d6e164e3 | 2696 | out: |
07f6c4bc | 2697 | rcu_read_unlock(); |
d6e164e3 RA |
2698 | cb->args[0] = tbl_id; |
2699 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2700 | |
2701 | return skb->len; | |
2702 | } | |
1a1a143d RA |
2703 | |
2704 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2705 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2706 | struct netlink_callback *cb, | |
2707 | struct publication *publ) | |
1a1a143d RA |
2708 | { |
2709 | void *hdr; | |
2710 | struct nlattr *attrs; | |
2711 | ||
2712 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2713 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2714 | if (!hdr) |
2715 | goto msg_cancel; | |
2716 | ||
2717 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2718 | if (!attrs) | |
2719 | goto genlmsg_cancel; | |
2720 | ||
2721 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2722 | goto attr_msg_cancel; | |
2723 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2724 | goto attr_msg_cancel; | |
2725 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2726 | goto attr_msg_cancel; | |
2727 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2728 | goto attr_msg_cancel; | |
2729 | ||
2730 | nla_nest_end(skb, attrs); | |
2731 | genlmsg_end(skb, hdr); | |
2732 | ||
2733 | return 0; | |
2734 | ||
2735 | attr_msg_cancel: | |
2736 | nla_nest_cancel(skb, attrs); | |
2737 | genlmsg_cancel: | |
2738 | genlmsg_cancel(skb, hdr); | |
2739 | msg_cancel: | |
2740 | return -EMSGSIZE; | |
2741 | } | |
2742 | ||
2743 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2744 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2745 | struct netlink_callback *cb, | |
2746 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2747 | { |
2748 | int err; | |
2749 | struct publication *p; | |
2750 | ||
2751 | if (*last_publ) { | |
2752 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2753 | if (p->key == *last_publ) | |
2754 | break; | |
2755 | } | |
2756 | if (p->key != *last_publ) { | |
2757 | /* We never set seq or call nl_dump_check_consistent() | |
2758 | * this means that setting prev_seq here will cause the | |
2759 | * consistence check to fail in the netlink callback | |
2760 | * handler. Resulting in the last NLMSG_DONE message | |
2761 | * having the NLM_F_DUMP_INTR flag set. | |
2762 | */ | |
2763 | cb->prev_seq = 1; | |
2764 | *last_publ = 0; | |
2765 | return -EPIPE; | |
2766 | } | |
2767 | } else { | |
2768 | p = list_first_entry(&tsk->publications, struct publication, | |
2769 | pport_list); | |
2770 | } | |
2771 | ||
2772 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2773 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2774 | if (err) { | |
2775 | *last_publ = p->key; | |
2776 | return err; | |
2777 | } | |
2778 | } | |
2779 | *last_publ = 0; | |
2780 | ||
2781 | return 0; | |
2782 | } | |
2783 | ||
2784 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2785 | { | |
2786 | int err; | |
07f6c4bc | 2787 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2788 | u32 last_publ = cb->args[1]; |
2789 | u32 done = cb->args[2]; | |
e05b31f4 | 2790 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2791 | struct tipc_sock *tsk; |
2792 | ||
07f6c4bc | 2793 | if (!tsk_portid) { |
1a1a143d RA |
2794 | struct nlattr **attrs; |
2795 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2796 | ||
2797 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2798 | if (err) | |
2799 | return err; | |
2800 | ||
2801 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2802 | attrs[TIPC_NLA_SOCK], | |
2803 | tipc_nl_sock_policy); | |
2804 | if (err) | |
2805 | return err; | |
2806 | ||
2807 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2808 | return -EINVAL; | |
2809 | ||
07f6c4bc | 2810 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2811 | } |
2812 | ||
2813 | if (done) | |
2814 | return 0; | |
2815 | ||
e05b31f4 | 2816 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2817 | if (!tsk) |
2818 | return -EINVAL; | |
2819 | ||
2820 | lock_sock(&tsk->sk); | |
2821 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2822 | if (!err) | |
2823 | done = 1; | |
2824 | release_sock(&tsk->sk); | |
07f6c4bc | 2825 | sock_put(&tsk->sk); |
1a1a143d | 2826 | |
07f6c4bc | 2827 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2828 | cb->args[1] = last_publ; |
2829 | cb->args[2] = done; | |
2830 | ||
2831 | return skb->len; | |
2832 | } |