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" |
49cc66ea | 45 | #include "netlink.h" |
2cf8aa19 | 46 | |
07f6c4bc YX |
47 | #define SS_LISTENING -1 /* socket is listening */ |
48 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 49 | |
07f6c4bc | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 51 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
52 | #define TIPC_FWD_MSG 1 |
53 | #define TIPC_CONN_OK 0 | |
54 | #define TIPC_CONN_PROBING 1 | |
55 | #define TIPC_MAX_PORT 0xffffffff | |
56 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
57 | |
58 | /** | |
59 | * struct tipc_sock - TIPC socket structure | |
60 | * @sk: socket - interacts with 'port' and with user via the socket API | |
61 | * @connected: non-zero if port is currently connected to a peer port | |
62 | * @conn_type: TIPC type used when connection was established | |
63 | * @conn_instance: TIPC instance used when connection was established | |
64 | * @published: non-zero if port has one or more associated names | |
65 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 66 | * @portid: unique port identity in TIPC socket hash table |
301bae56 JPM |
67 | * @phdr: preformatted message header used when sending messages |
68 | * @port_list: adjacent ports in TIPC's global list of ports | |
69 | * @publications: list of publications for port | |
70 | * @pub_count: total # of publications port has made during its lifetime | |
71 | * @probing_state: | |
2f55c437 | 72 | * @probing_intv: |
301bae56 JPM |
73 | * @conn_timeout: the time we can wait for an unresponded setup request |
74 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
75 | * @link_cong: non-zero if owner must sleep because of link congestion | |
76 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
77 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
f2f8036e | 78 | * @remote: 'connected' peer for dgram/rdm |
07f6c4bc YX |
79 | * @node: hash table node |
80 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
81 | */ |
82 | struct tipc_sock { | |
83 | struct sock sk; | |
84 | int connected; | |
85 | u32 conn_type; | |
86 | u32 conn_instance; | |
87 | int published; | |
88 | u32 max_pkt; | |
07f6c4bc | 89 | u32 portid; |
301bae56 JPM |
90 | struct tipc_msg phdr; |
91 | struct list_head sock_list; | |
92 | struct list_head publications; | |
93 | u32 pub_count; | |
94 | u32 probing_state; | |
2f55c437 | 95 | unsigned long probing_intv; |
301bae56 JPM |
96 | uint conn_timeout; |
97 | atomic_t dupl_rcvcnt; | |
98 | bool link_cong; | |
99 | uint sent_unacked; | |
100 | uint rcv_unacked; | |
f2f8036e | 101 | struct sockaddr_tipc remote; |
07f6c4bc YX |
102 | struct rhash_head node; |
103 | struct rcu_head rcu; | |
301bae56 | 104 | }; |
b97bf3fd | 105 | |
4f4482dc | 106 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 107 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 108 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 109 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
110 | static int tipc_release(struct socket *sock); |
111 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 112 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 113 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 114 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
301bae56 | 116 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 117 | struct tipc_name_seq const *seq); |
e05b31f4 | 118 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
119 | static int tipc_sk_insert(struct tipc_sock *tsk); |
120 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
121 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
122 | size_t dsz); | |
123 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 124 | |
bca65eae FW |
125 | static const struct proto_ops packet_ops; |
126 | static const struct proto_ops stream_ops; | |
127 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
128 | static struct proto tipc_proto; |
129 | ||
6cca7289 HX |
130 | static const struct rhashtable_params tsk_rht_params; |
131 | ||
c4307285 | 132 | /* |
0c3141e9 AS |
133 | * Revised TIPC socket locking policy: |
134 | * | |
135 | * Most socket operations take the standard socket lock when they start | |
136 | * and hold it until they finish (or until they need to sleep). Acquiring | |
137 | * this lock grants the owner exclusive access to the fields of the socket | |
138 | * data structures, with the exception of the backlog queue. A few socket | |
139 | * operations can be done without taking the socket lock because they only | |
140 | * read socket information that never changes during the life of the socket. | |
141 | * | |
142 | * Socket operations may acquire the lock for the associated TIPC port if they | |
143 | * need to perform an operation on the port. If any routine needs to acquire | |
144 | * both the socket lock and the port lock it must take the socket lock first | |
145 | * to avoid the risk of deadlock. | |
146 | * | |
147 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
148 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
149 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
150 | * and either handles the message itself or adds it to the socket's backlog | |
151 | * queue; in the latter case the queued message is processed once the process | |
152 | * owning the socket lock releases it. | |
153 | * | |
154 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
155 | * the problem of a blocked socket operation preventing any other operations | |
156 | * from occurring. However, applications must be careful if they have | |
157 | * multiple threads trying to send (or receive) on the same socket, as these | |
158 | * operations might interfere with each other. For example, doing a connect | |
159 | * and a receive at the same time might allow the receive to consume the | |
160 | * ACK message meant for the connect. While additional work could be done | |
161 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
162 | * | |
163 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
164 | * that another operation that must be performed in a non-blocking manner is | |
165 | * not delayed for very long because the lock has already been taken. | |
166 | * | |
167 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
168 | * constant over its lifetime; such fields can be examined without taking | |
169 | * the socket lock and/or port lock, and do not need to be re-read even | |
170 | * after resuming processing after waiting. These fields include: | |
171 | * - socket type | |
172 | * - pointer to socket sk structure (aka tipc_sock structure) | |
173 | * - pointer to port structure | |
174 | * - port reference | |
175 | */ | |
176 | ||
c5898636 JPM |
177 | static u32 tsk_own_node(struct tipc_sock *tsk) |
178 | { | |
179 | return msg_prevnode(&tsk->phdr); | |
180 | } | |
181 | ||
301bae56 | 182 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 183 | { |
301bae56 | 184 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
185 | } |
186 | ||
301bae56 | 187 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 188 | { |
301bae56 | 189 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
190 | } |
191 | ||
301bae56 | 192 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 193 | { |
301bae56 | 194 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
195 | } |
196 | ||
301bae56 | 197 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 198 | { |
301bae56 | 199 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
200 | } |
201 | ||
301bae56 | 202 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 203 | { |
301bae56 | 204 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
205 | } |
206 | ||
301bae56 | 207 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 208 | { |
301bae56 | 209 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
210 | } |
211 | ||
301bae56 | 212 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 213 | { |
301bae56 | 214 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
215 | } |
216 | ||
301bae56 | 217 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
218 | { |
219 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
220 | return -EINVAL; | |
301bae56 | 221 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
222 | return 0; |
223 | } | |
8826cde6 | 224 | |
301bae56 JPM |
225 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
226 | { | |
227 | return container_of(sk, struct tipc_sock, sk); | |
228 | } | |
229 | ||
230 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
231 | { | |
232 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
233 | } | |
234 | ||
0c3141e9 | 235 | /** |
2e84c60b | 236 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
237 | * |
238 | * Caller must hold socket lock | |
b97bf3fd | 239 | */ |
2e84c60b | 240 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 241 | { |
5f6d9123 | 242 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
243 | } |
244 | ||
bcd3ffd4 JPM |
245 | /* tipc_sk_respond() : send response message back to sender |
246 | */ | |
247 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
248 | { | |
249 | u32 selector; | |
250 | u32 dnode; | |
251 | u32 onode = tipc_own_addr(sock_net(sk)); | |
252 | ||
253 | if (!tipc_msg_reverse(onode, &skb, err)) | |
254 | return; | |
255 | ||
256 | dnode = msg_destnode(buf_msg(skb)); | |
257 | selector = msg_origport(buf_msg(skb)); | |
258 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
259 | } | |
260 | ||
b97bf3fd | 261 | /** |
2e84c60b | 262 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
263 | * |
264 | * Caller must hold socket lock | |
b97bf3fd | 265 | */ |
2e84c60b | 266 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 267 | { |
a6ca1094 | 268 | struct sk_buff *skb; |
0c3141e9 | 269 | |
bcd3ffd4 JPM |
270 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
271 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
272 | } |
273 | ||
2e84c60b | 274 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
275 | * |
276 | * Handles cases where the node's network address has changed from | |
277 | * the default of <0.0.0> to its configured setting. | |
278 | */ | |
2e84c60b | 279 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 280 | { |
34747539 | 281 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 282 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
283 | u32 orig_node; |
284 | u32 peer_node; | |
285 | ||
301bae56 | 286 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
287 | return false; |
288 | ||
289 | if (unlikely(msg_origport(msg) != peer_port)) | |
290 | return false; | |
291 | ||
292 | orig_node = msg_orignode(msg); | |
301bae56 | 293 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
294 | |
295 | if (likely(orig_node == peer_node)) | |
296 | return true; | |
297 | ||
34747539 | 298 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
299 | return true; |
300 | ||
34747539 | 301 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
302 | return true; |
303 | ||
304 | return false; | |
305 | } | |
306 | ||
b97bf3fd | 307 | /** |
c5fa7b3c | 308 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 309 | * @net: network namespace (must be default network) |
b97bf3fd PL |
310 | * @sock: pre-allocated socket structure |
311 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 312 | * @kern: caused by kernel or by userspace? |
c4307285 | 313 | * |
0c3141e9 AS |
314 | * This routine creates additional data structures used by the TIPC socket, |
315 | * initializes them, and links them together. | |
b97bf3fd PL |
316 | * |
317 | * Returns 0 on success, errno otherwise | |
318 | */ | |
58ed9442 JPM |
319 | static int tipc_sk_create(struct net *net, struct socket *sock, |
320 | int protocol, int kern) | |
b97bf3fd | 321 | { |
c5898636 | 322 | struct tipc_net *tn; |
0c3141e9 AS |
323 | const struct proto_ops *ops; |
324 | socket_state state; | |
b97bf3fd | 325 | struct sock *sk; |
58ed9442 | 326 | struct tipc_sock *tsk; |
5b8fa7ce | 327 | struct tipc_msg *msg; |
0c3141e9 AS |
328 | |
329 | /* Validate arguments */ | |
b97bf3fd PL |
330 | if (unlikely(protocol != 0)) |
331 | return -EPROTONOSUPPORT; | |
332 | ||
b97bf3fd PL |
333 | switch (sock->type) { |
334 | case SOCK_STREAM: | |
0c3141e9 AS |
335 | ops = &stream_ops; |
336 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
337 | break; |
338 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
339 | ops = &packet_ops; |
340 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
341 | break; |
342 | case SOCK_DGRAM: | |
b97bf3fd | 343 | case SOCK_RDM: |
0c3141e9 AS |
344 | ops = &msg_ops; |
345 | state = SS_READY; | |
b97bf3fd | 346 | break; |
49978651 | 347 | default: |
49978651 | 348 | return -EPROTOTYPE; |
b97bf3fd PL |
349 | } |
350 | ||
0c3141e9 | 351 | /* Allocate socket's protocol area */ |
11aa9c28 | 352 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 353 | if (sk == NULL) |
b97bf3fd | 354 | return -ENOMEM; |
b97bf3fd | 355 | |
58ed9442 | 356 | tsk = tipc_sk(sk); |
301bae56 | 357 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
358 | INIT_LIST_HEAD(&tsk->publications); |
359 | msg = &tsk->phdr; | |
c5898636 JPM |
360 | tn = net_generic(sock_net(sk), tipc_net_id); |
361 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 362 | NAMED_H_SIZE, 0); |
b97bf3fd | 363 | |
0c3141e9 | 364 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
365 | sock->ops = ops; |
366 | sock->state = state; | |
0c3141e9 | 367 | sock_init_data(sock, sk); |
07f6c4bc YX |
368 | if (tipc_sk_insert(tsk)) { |
369 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
370 | return -EINVAL; | |
371 | } | |
372 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 373 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 374 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 375 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
376 | sk->sk_data_ready = tipc_data_ready; |
377 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 378 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 379 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 380 | tsk->sent_unacked = 0; |
4f4482dc | 381 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 382 | |
0c3141e9 | 383 | if (sock->state == SS_READY) { |
301bae56 | 384 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 385 | if (sock->type == SOCK_DGRAM) |
301bae56 | 386 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 387 | } |
b97bf3fd PL |
388 | return 0; |
389 | } | |
390 | ||
07f6c4bc YX |
391 | static void tipc_sk_callback(struct rcu_head *head) |
392 | { | |
393 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
394 | ||
395 | sock_put(&tsk->sk); | |
396 | } | |
397 | ||
b97bf3fd | 398 | /** |
247f0f3c | 399 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
400 | * @sock: socket to destroy |
401 | * | |
402 | * This routine cleans up any messages that are still queued on the socket. | |
403 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
404 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
405 | * and any others are discarded. (If the first message on a STREAM socket | |
406 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 407 | * |
b97bf3fd PL |
408 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
409 | * are returned or discarded according to the "destination droppable" setting | |
410 | * specified for the message by the sender. | |
411 | * | |
412 | * Returns 0 on success, errno otherwise | |
413 | */ | |
247f0f3c | 414 | static int tipc_release(struct socket *sock) |
b97bf3fd | 415 | { |
b97bf3fd | 416 | struct sock *sk = sock->sk; |
357c4774 | 417 | struct net *net; |
58ed9442 | 418 | struct tipc_sock *tsk; |
a6ca1094 | 419 | struct sk_buff *skb; |
1ea23a21 | 420 | u32 dnode; |
b97bf3fd | 421 | |
0c3141e9 AS |
422 | /* |
423 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
424 | * releases a pre-allocated child socket that was never used) | |
425 | */ | |
0c3141e9 | 426 | if (sk == NULL) |
b97bf3fd | 427 | return 0; |
c4307285 | 428 | |
357c4774 | 429 | net = sock_net(sk); |
58ed9442 | 430 | tsk = tipc_sk(sk); |
0c3141e9 AS |
431 | lock_sock(sk); |
432 | ||
433 | /* | |
434 | * Reject all unreceived messages, except on an active connection | |
435 | * (which disconnects locally & sends a 'FIN+' to peer) | |
436 | */ | |
301bae56 | 437 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 438 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
439 | skb = __skb_dequeue(&sk->sk_receive_queue); |
440 | if (skb == NULL) | |
b97bf3fd | 441 | break; |
a6ca1094 YX |
442 | if (TIPC_SKB_CB(skb)->handle != NULL) |
443 | kfree_skb(skb); | |
0c3141e9 AS |
444 | else { |
445 | if ((sock->state == SS_CONNECTING) || | |
446 | (sock->state == SS_CONNECTED)) { | |
447 | sock->state = SS_DISCONNECTING; | |
301bae56 | 448 | tsk->connected = 0; |
f2f9800d | 449 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 450 | } |
bcd3ffd4 | 451 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
0c3141e9 | 452 | } |
b97bf3fd PL |
453 | } |
454 | ||
301bae56 | 455 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 456 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 457 | tipc_sk_remove(tsk); |
301bae56 | 458 | if (tsk->connected) { |
c5898636 | 459 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 460 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 461 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 462 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 463 | if (skb) |
af9b028e | 464 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
f2f9800d | 465 | tipc_node_remove_conn(net, dnode, tsk->portid); |
5b8fa7ce | 466 | } |
b97bf3fd | 467 | |
0c3141e9 | 468 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
469 | sock->state = SS_DISCONNECTING; |
470 | release_sock(sk); | |
07f6c4bc YX |
471 | |
472 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 473 | sock->sk = NULL; |
b97bf3fd | 474 | |
065d7e39 | 475 | return 0; |
b97bf3fd PL |
476 | } |
477 | ||
478 | /** | |
247f0f3c | 479 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
480 | * @sock: socket structure |
481 | * @uaddr: socket address describing name(s) and desired operation | |
482 | * @uaddr_len: size of socket address data structure | |
c4307285 | 483 | * |
b97bf3fd PL |
484 | * Name and name sequence binding is indicated using a positive scope value; |
485 | * a negative scope value unbinds the specified name. Specifying no name | |
486 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 487 | * |
b97bf3fd | 488 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
489 | * |
490 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
491 | * access any non-constant socket information. | |
b97bf3fd | 492 | */ |
247f0f3c YX |
493 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
494 | int uaddr_len) | |
b97bf3fd | 495 | { |
84602761 | 496 | struct sock *sk = sock->sk; |
b97bf3fd | 497 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 498 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 499 | int res = -EINVAL; |
b97bf3fd | 500 | |
84602761 YX |
501 | lock_sock(sk); |
502 | if (unlikely(!uaddr_len)) { | |
301bae56 | 503 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
504 | goto exit; |
505 | } | |
c4307285 | 506 | |
84602761 YX |
507 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
508 | res = -EINVAL; | |
509 | goto exit; | |
510 | } | |
511 | if (addr->family != AF_TIPC) { | |
512 | res = -EAFNOSUPPORT; | |
513 | goto exit; | |
514 | } | |
b97bf3fd | 515 | |
b97bf3fd PL |
516 | if (addr->addrtype == TIPC_ADDR_NAME) |
517 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
518 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
519 | res = -EAFNOSUPPORT; | |
520 | goto exit; | |
521 | } | |
c4307285 | 522 | |
13a2e898 | 523 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 524 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
525 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
526 | res = -EACCES; | |
527 | goto exit; | |
528 | } | |
c422f1bd | 529 | |
84602761 | 530 | res = (addr->scope > 0) ? |
301bae56 JPM |
531 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
532 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
533 | exit: |
534 | release_sock(sk); | |
535 | return res; | |
b97bf3fd PL |
536 | } |
537 | ||
c4307285 | 538 | /** |
247f0f3c | 539 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
540 | * @sock: socket structure |
541 | * @uaddr: area for returned socket address | |
542 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 543 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 544 | * |
b97bf3fd | 545 | * Returns 0 on success, errno otherwise |
0c3141e9 | 546 | * |
2da59918 AS |
547 | * NOTE: This routine doesn't need to take the socket lock since it only |
548 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 549 | * a completely predictable manner). |
b97bf3fd | 550 | */ |
247f0f3c YX |
551 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
552 | int *uaddr_len, int peer) | |
b97bf3fd | 553 | { |
b97bf3fd | 554 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 555 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 556 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 557 | |
88f8a5e3 | 558 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 559 | if (peer) { |
2da59918 AS |
560 | if ((sock->state != SS_CONNECTED) && |
561 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
562 | return -ENOTCONN; | |
301bae56 JPM |
563 | addr->addr.id.ref = tsk_peer_port(tsk); |
564 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 565 | } else { |
07f6c4bc | 566 | addr->addr.id.ref = tsk->portid; |
34747539 | 567 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 568 | } |
b97bf3fd PL |
569 | |
570 | *uaddr_len = sizeof(*addr); | |
571 | addr->addrtype = TIPC_ADDR_ID; | |
572 | addr->family = AF_TIPC; | |
573 | addr->scope = 0; | |
b97bf3fd PL |
574 | addr->addr.name.domain = 0; |
575 | ||
0c3141e9 | 576 | return 0; |
b97bf3fd PL |
577 | } |
578 | ||
579 | /** | |
247f0f3c | 580 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
581 | * @file: file structure associated with the socket |
582 | * @sock: socket for which to calculate the poll bits | |
583 | * @wait: ??? | |
584 | * | |
9b674e82 AS |
585 | * Returns pollmask value |
586 | * | |
587 | * COMMENTARY: | |
588 | * It appears that the usual socket locking mechanisms are not useful here | |
589 | * since the pollmask info is potentially out-of-date the moment this routine | |
590 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
591 | * to handle any preventable race conditions, so TIPC will do the same ... | |
592 | * | |
593 | * TIPC sets the returned events as follows: | |
f662c070 AS |
594 | * |
595 | * socket state flags set | |
596 | * ------------ --------- | |
597 | * unconnected no read flags | |
c4fc298a | 598 | * POLLOUT if port is not congested |
f662c070 AS |
599 | * |
600 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
601 | * no write flags | |
602 | * | |
603 | * connected POLLIN/POLLRDNORM if data in rx queue | |
604 | * POLLOUT if port is not congested | |
605 | * | |
606 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
607 | * no write flags | |
608 | * | |
609 | * listening POLLIN if SYN in rx queue | |
610 | * no write flags | |
611 | * | |
612 | * ready POLLIN/POLLRDNORM if data in rx queue | |
613 | * [connectionless] POLLOUT (since port cannot be congested) | |
614 | * | |
615 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
616 | * imply that the operation will succeed, merely that it should be performed | |
617 | * and will not block. | |
b97bf3fd | 618 | */ |
247f0f3c YX |
619 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
620 | poll_table *wait) | |
b97bf3fd | 621 | { |
9b674e82 | 622 | struct sock *sk = sock->sk; |
58ed9442 | 623 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 624 | u32 mask = 0; |
9b674e82 | 625 | |
f288bef4 | 626 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 627 | |
f662c070 | 628 | switch ((int)sock->state) { |
c4fc298a | 629 | case SS_UNCONNECTED: |
60120526 | 630 | if (!tsk->link_cong) |
c4fc298a EH |
631 | mask |= POLLOUT; |
632 | break; | |
f662c070 AS |
633 | case SS_READY: |
634 | case SS_CONNECTED: | |
301bae56 | 635 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
636 | mask |= POLLOUT; |
637 | /* fall thru' */ | |
638 | case SS_CONNECTING: | |
639 | case SS_LISTENING: | |
640 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
641 | mask |= (POLLIN | POLLRDNORM); | |
642 | break; | |
643 | case SS_DISCONNECTING: | |
644 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
645 | break; | |
646 | } | |
9b674e82 AS |
647 | |
648 | return mask; | |
b97bf3fd PL |
649 | } |
650 | ||
0abd8ff2 JPM |
651 | /** |
652 | * tipc_sendmcast - send multicast message | |
653 | * @sock: socket structure | |
654 | * @seq: destination address | |
562640f3 | 655 | * @msg: message to send |
0abd8ff2 JPM |
656 | * @dsz: total length of message data |
657 | * @timeo: timeout to wait for wakeup | |
658 | * | |
659 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
660 | * Returns the number of bytes sent on success, or errno | |
661 | */ | |
662 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 663 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
664 | { |
665 | struct sock *sk = sock->sk; | |
c5898636 | 666 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 667 | struct net *net = sock_net(sk); |
c5898636 | 668 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 669 | struct sk_buff_head pktchain; |
f25dcc76 | 670 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
671 | uint mtu; |
672 | int rc; | |
673 | ||
674 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
675 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
676 | msg_set_destport(mhdr, 0); | |
677 | msg_set_destnode(mhdr, 0); | |
678 | msg_set_nametype(mhdr, seq->type); | |
679 | msg_set_namelower(mhdr, seq->lower); | |
680 | msg_set_nameupper(mhdr, seq->upper); | |
681 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
682 | ||
f214fc40 PB |
683 | skb_queue_head_init(&pktchain); |
684 | ||
0abd8ff2 | 685 | new_mtu: |
959e1781 | 686 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 687 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
688 | if (unlikely(rc < 0)) |
689 | return rc; | |
690 | ||
691 | do { | |
f214fc40 | 692 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
693 | if (likely(!rc)) |
694 | return dsz; | |
695 | ||
696 | if (rc == -ELINKCONG) { | |
697 | tsk->link_cong = 1; | |
698 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
699 | if (!rc) | |
700 | continue; | |
0abd8ff2 | 701 | } |
f214fc40 | 702 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
703 | if (rc == -EMSGSIZE) { |
704 | msg->msg_iter = save; | |
0abd8ff2 | 705 | goto new_mtu; |
f25dcc76 | 706 | } |
22d85c79 JPM |
707 | break; |
708 | } while (1); | |
0abd8ff2 JPM |
709 | return rc; |
710 | } | |
711 | ||
cb1b7280 JPM |
712 | /** |
713 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
714 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
715 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
716 | * | |
717 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 718 | */ |
cb1b7280 JPM |
719 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
720 | struct sk_buff_head *inputq) | |
078bec82 | 721 | { |
cb1b7280 | 722 | struct tipc_msg *msg; |
3c724acd | 723 | struct tipc_plist dports; |
3c724acd | 724 | u32 portid; |
078bec82 | 725 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
726 | struct sk_buff_head tmpq; |
727 | uint hsz; | |
728 | struct sk_buff *skb, *_skb; | |
3c724acd | 729 | |
cb1b7280 | 730 | __skb_queue_head_init(&tmpq); |
3c724acd | 731 | tipc_plist_init(&dports); |
078bec82 | 732 | |
cb1b7280 JPM |
733 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
734 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
735 | msg = buf_msg(skb); | |
736 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
737 | ||
738 | if (in_own_node(net, msg_orignode(msg))) | |
739 | scope = TIPC_NODE_SCOPE; | |
740 | ||
741 | /* Create destination port list and message clones: */ | |
742 | tipc_nametbl_mc_translate(net, | |
743 | msg_nametype(msg), msg_namelower(msg), | |
744 | msg_nameupper(msg), scope, &dports); | |
745 | portid = tipc_plist_pop(&dports); | |
746 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
747 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
748 | if (_skb) { | |
749 | msg_set_destport(buf_msg(_skb), portid); | |
750 | __skb_queue_tail(&tmpq, _skb); | |
751 | continue; | |
752 | } | |
753 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 754 | } |
cb1b7280 JPM |
755 | /* Append to inputq if not already done by other thread */ |
756 | spin_lock_bh(&inputq->lock); | |
757 | if (skb_peek(arrvq) == skb) { | |
758 | skb_queue_splice_tail_init(&tmpq, inputq); | |
759 | kfree_skb(__skb_dequeue(arrvq)); | |
760 | } | |
761 | spin_unlock_bh(&inputq->lock); | |
762 | __skb_queue_purge(&tmpq); | |
763 | kfree_skb(skb); | |
078bec82 | 764 | } |
cb1b7280 | 765 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
766 | } |
767 | ||
ac0074ee JPM |
768 | /** |
769 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
770 | * @tsk: receiving socket | |
bcd3ffd4 | 771 | * @skb: pointer to message buffer. |
ac0074ee | 772 | */ |
bcd3ffd4 | 773 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb) |
ac0074ee | 774 | { |
bcd3ffd4 JPM |
775 | struct sock *sk = &tsk->sk; |
776 | struct tipc_msg *hdr = buf_msg(skb); | |
777 | int mtyp = msg_type(hdr); | |
60120526 | 778 | int conn_cong; |
bcd3ffd4 | 779 | |
ac0074ee | 780 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 781 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
782 | goto exit; |
783 | ||
301bae56 | 784 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee | 785 | |
bcd3ffd4 JPM |
786 | if (mtyp == CONN_PROBE) { |
787 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
788 | tipc_sk_respond(sk, skb, TIPC_OK); | |
789 | return; | |
790 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 791 | conn_cong = tsk_conn_cong(tsk); |
bcd3ffd4 | 792 | tsk->sent_unacked -= msg_msgcnt(hdr); |
60120526 | 793 | if (conn_cong) |
bcd3ffd4 JPM |
794 | sk->sk_write_space(sk); |
795 | } else if (mtyp != CONN_PROBE_REPLY) { | |
796 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 797 | } |
ac0074ee | 798 | exit: |
bcd3ffd4 | 799 | kfree_skb(skb); |
ac0074ee JPM |
800 | } |
801 | ||
3f40504f YX |
802 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
803 | { | |
804 | struct sock *sk = sock->sk; | |
58ed9442 | 805 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
806 | DEFINE_WAIT(wait); |
807 | int done; | |
808 | ||
809 | do { | |
810 | int err = sock_error(sk); | |
811 | if (err) | |
812 | return err; | |
813 | if (sock->state == SS_DISCONNECTING) | |
814 | return -EPIPE; | |
815 | if (!*timeo_p) | |
816 | return -EAGAIN; | |
817 | if (signal_pending(current)) | |
818 | return sock_intr_errno(*timeo_p); | |
819 | ||
820 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 821 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
822 | finish_wait(sk_sleep(sk), &wait); |
823 | } while (!done); | |
824 | return 0; | |
825 | } | |
826 | ||
b97bf3fd | 827 | /** |
247f0f3c | 828 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
829 | * @sock: socket structure |
830 | * @m: message to send | |
e2dafe87 | 831 | * @dsz: amount of user data to be sent |
c4307285 | 832 | * |
b97bf3fd | 833 | * Message must have an destination specified explicitly. |
c4307285 | 834 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
835 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
836 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 837 | * |
b97bf3fd PL |
838 | * Returns the number of bytes sent on success, or errno otherwise |
839 | */ | |
1b784140 | 840 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 841 | struct msghdr *m, size_t dsz) |
39a0295f YX |
842 | { |
843 | struct sock *sk = sock->sk; | |
844 | int ret; | |
845 | ||
846 | lock_sock(sk); | |
847 | ret = __tipc_sendmsg(sock, m, dsz); | |
848 | release_sock(sk); | |
849 | ||
850 | return ret; | |
851 | } | |
852 | ||
853 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 854 | { |
e2dafe87 | 855 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 856 | struct sock *sk = sock->sk; |
58ed9442 | 857 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 858 | struct net *net = sock_net(sk); |
301bae56 | 859 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 860 | u32 dnode, dport; |
f214fc40 | 861 | struct sk_buff_head pktchain; |
a6ca1094 | 862 | struct sk_buff *skb; |
f2f8036e | 863 | struct tipc_name_seq *seq; |
f25dcc76 | 864 | struct iov_iter save; |
e2dafe87 | 865 | u32 mtu; |
3f40504f | 866 | long timeo; |
88b17b6a | 867 | int rc; |
b97bf3fd | 868 | |
e2dafe87 | 869 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 870 | return -EMSGSIZE; |
f2f8036e EH |
871 | if (unlikely(!dest)) { |
872 | if (tsk->connected && sock->state == SS_READY) | |
873 | dest = &tsk->remote; | |
874 | else | |
875 | return -EDESTADDRREQ; | |
876 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
877 | dest->family != AF_TIPC) { | |
878 | return -EINVAL; | |
879 | } | |
e2dafe87 | 880 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
881 | if (sock->state == SS_LISTENING) |
882 | return -EPIPE; | |
883 | if (sock->state != SS_UNCONNECTED) | |
884 | return -EISCONN; | |
885 | if (tsk->published) | |
886 | return -EOPNOTSUPP; | |
3388007b | 887 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
888 | tsk->conn_type = dest->addr.name.name.type; |
889 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 890 | } |
b97bf3fd | 891 | } |
f2f8036e | 892 | seq = &dest->addr.nameseq; |
3f40504f | 893 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
894 | |
895 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 896 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
897 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
898 | u32 type = dest->addr.name.name.type; | |
899 | u32 inst = dest->addr.name.name.instance; | |
900 | u32 domain = dest->addr.name.domain; | |
901 | ||
902 | dnode = domain; | |
903 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
904 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
905 | msg_set_nametype(mhdr, type); | |
906 | msg_set_nameinst(mhdr, inst); | |
907 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 908 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
909 | msg_set_destnode(mhdr, dnode); |
910 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
911 | if (unlikely(!dport && !dnode)) |
912 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
913 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
914 | dnode = dest->addr.id.node; | |
915 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
916 | msg_set_lookup_scope(mhdr, 0); | |
917 | msg_set_destnode(mhdr, dnode); | |
918 | msg_set_destport(mhdr, dest->addr.id.ref); | |
919 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
920 | } | |
921 | ||
f214fc40 | 922 | skb_queue_head_init(&pktchain); |
f25dcc76 | 923 | save = m->msg_iter; |
e2dafe87 | 924 | new_mtu: |
f2f9800d | 925 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 926 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 927 | if (rc < 0) |
39a0295f | 928 | return rc; |
e2dafe87 JPM |
929 | |
930 | do { | |
f214fc40 | 931 | skb = skb_peek(&pktchain); |
a6ca1094 | 932 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 933 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 934 | if (likely(!rc)) { |
e2dafe87 | 935 | if (sock->state != SS_READY) |
0c3141e9 | 936 | sock->state = SS_CONNECTING; |
22d85c79 | 937 | return dsz; |
c4307285 | 938 | } |
22d85c79 JPM |
939 | if (rc == -ELINKCONG) { |
940 | tsk->link_cong = 1; | |
941 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
942 | if (!rc) | |
943 | continue; | |
944 | } | |
f214fc40 | 945 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
946 | if (rc == -EMSGSIZE) { |
947 | m->msg_iter = save; | |
e2dafe87 | 948 | goto new_mtu; |
f25dcc76 | 949 | } |
22d85c79 JPM |
950 | break; |
951 | } while (1); | |
e2dafe87 JPM |
952 | |
953 | return rc; | |
b97bf3fd PL |
954 | } |
955 | ||
391a6dd1 YX |
956 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
957 | { | |
958 | struct sock *sk = sock->sk; | |
58ed9442 | 959 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
960 | DEFINE_WAIT(wait); |
961 | int done; | |
962 | ||
963 | do { | |
964 | int err = sock_error(sk); | |
965 | if (err) | |
966 | return err; | |
967 | if (sock->state == SS_DISCONNECTING) | |
968 | return -EPIPE; | |
969 | else if (sock->state != SS_CONNECTED) | |
970 | return -ENOTCONN; | |
971 | if (!*timeo_p) | |
972 | return -EAGAIN; | |
973 | if (signal_pending(current)) | |
974 | return sock_intr_errno(*timeo_p); | |
975 | ||
976 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
977 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 978 | (!tsk->link_cong && |
301bae56 JPM |
979 | !tsk_conn_cong(tsk)) || |
980 | !tsk->connected); | |
391a6dd1 YX |
981 | finish_wait(sk_sleep(sk), &wait); |
982 | } while (!done); | |
983 | return 0; | |
984 | } | |
985 | ||
c4307285 | 986 | /** |
4ccfe5e0 | 987 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 988 | * @sock: socket structure |
4ccfe5e0 JPM |
989 | * @m: data to send |
990 | * @dsz: total length of data to be transmitted | |
c4307285 | 991 | * |
4ccfe5e0 | 992 | * Used for SOCK_STREAM data. |
c4307285 | 993 | * |
4ccfe5e0 JPM |
994 | * Returns the number of bytes sent on success (or partial success), |
995 | * or errno if no data sent | |
b97bf3fd | 996 | */ |
1b784140 | 997 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
998 | { |
999 | struct sock *sk = sock->sk; | |
1000 | int ret; | |
1001 | ||
1002 | lock_sock(sk); | |
1003 | ret = __tipc_send_stream(sock, m, dsz); | |
1004 | release_sock(sk); | |
1005 | ||
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1010 | { |
0c3141e9 | 1011 | struct sock *sk = sock->sk; |
f2f9800d | 1012 | struct net *net = sock_net(sk); |
58ed9442 | 1013 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1014 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1015 | struct sk_buff_head pktchain; |
342dfc30 | 1016 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1017 | u32 portid = tsk->portid; |
4ccfe5e0 | 1018 | int rc = -EINVAL; |
391a6dd1 | 1019 | long timeo; |
4ccfe5e0 JPM |
1020 | u32 dnode; |
1021 | uint mtu, send, sent = 0; | |
f25dcc76 | 1022 | struct iov_iter save; |
b97bf3fd PL |
1023 | |
1024 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1025 | if (unlikely(dest)) { |
39a0295f | 1026 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1027 | if (dsz && (dsz == rc)) |
60120526 | 1028 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1029 | return rc; |
1030 | } | |
1031 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1032 | return -EMSGSIZE; |
1033 | ||
391a6dd1 YX |
1034 | if (unlikely(sock->state != SS_CONNECTED)) { |
1035 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1036 | return -EPIPE; |
391a6dd1 | 1037 | else |
39a0295f | 1038 | return -ENOTCONN; |
391a6dd1 | 1039 | } |
1d835874 | 1040 | |
391a6dd1 | 1041 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1042 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1043 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1044 | |
1045 | next: | |
f25dcc76 | 1046 | save = m->msg_iter; |
301bae56 | 1047 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1048 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1049 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1050 | if (unlikely(rc < 0)) |
39a0295f | 1051 | return rc; |
f214fc40 | 1052 | |
c4307285 | 1053 | do { |
301bae56 | 1054 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1055 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1056 | if (likely(!rc)) { |
60120526 | 1057 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1058 | sent += send; |
1059 | if (sent == dsz) | |
22d85c79 | 1060 | return dsz; |
4ccfe5e0 JPM |
1061 | goto next; |
1062 | } | |
1063 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1064 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1065 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1066 | portid); | |
f25dcc76 | 1067 | m->msg_iter = save; |
4ccfe5e0 JPM |
1068 | goto next; |
1069 | } | |
1070 | if (rc != -ELINKCONG) | |
1071 | break; | |
22d85c79 | 1072 | |
50100a5e | 1073 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1074 | } |
1075 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1076 | } while (!rc); | |
39a0295f | 1077 | |
f214fc40 | 1078 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1079 | return sent ? sent : rc; |
b97bf3fd PL |
1080 | } |
1081 | ||
c4307285 | 1082 | /** |
4ccfe5e0 | 1083 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1084 | * @sock: socket structure |
4ccfe5e0 JPM |
1085 | * @m: message to send |
1086 | * @dsz: length of data to be transmitted | |
c4307285 | 1087 | * |
4ccfe5e0 | 1088 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1089 | * |
4ccfe5e0 | 1090 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1091 | */ |
1b784140 | 1092 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1093 | { |
4ccfe5e0 JPM |
1094 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1095 | return -EMSGSIZE; | |
b97bf3fd | 1096 | |
1b784140 | 1097 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1098 | } |
1099 | ||
dadebc00 | 1100 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1101 | */ |
301bae56 | 1102 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1103 | u32 peer_node) |
b97bf3fd | 1104 | { |
3721e9c7 YX |
1105 | struct sock *sk = &tsk->sk; |
1106 | struct net *net = sock_net(sk); | |
301bae56 | 1107 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1108 | |
dadebc00 JPM |
1109 | msg_set_destnode(msg, peer_node); |
1110 | msg_set_destport(msg, peer_port); | |
1111 | msg_set_type(msg, TIPC_CONN_MSG); | |
1112 | msg_set_lookup_scope(msg, 0); | |
1113 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1114 | |
2f55c437 | 1115 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1116 | tsk->probing_state = TIPC_CONN_OK; |
1117 | tsk->connected = 1; | |
3721e9c7 | 1118 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1119 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1120 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1121 | } |
1122 | ||
1123 | /** | |
1124 | * set_orig_addr - capture sender's address for received message | |
1125 | * @m: descriptor for message info | |
1126 | * @msg: received message header | |
c4307285 | 1127 | * |
b97bf3fd PL |
1128 | * Note: Address is not captured if not requested by receiver. |
1129 | */ | |
05790c64 | 1130 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1131 | { |
342dfc30 | 1132 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1133 | |
c4307285 | 1134 | if (addr) { |
b97bf3fd PL |
1135 | addr->family = AF_TIPC; |
1136 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1137 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1138 | addr->addr.id.ref = msg_origport(msg); |
1139 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1140 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1141 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1142 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /** | |
301bae56 | 1147 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1148 | * @m: descriptor for message info |
1149 | * @msg: received message header | |
301bae56 | 1150 | * @tsk: TIPC port associated with message |
c4307285 | 1151 | * |
b97bf3fd | 1152 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1153 | * |
b97bf3fd PL |
1154 | * Returns 0 if successful, otherwise errno |
1155 | */ | |
301bae56 JPM |
1156 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1157 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1158 | { |
1159 | u32 anc_data[3]; | |
1160 | u32 err; | |
1161 | u32 dest_type; | |
3546c750 | 1162 | int has_name; |
b97bf3fd PL |
1163 | int res; |
1164 | ||
1165 | if (likely(m->msg_controllen == 0)) | |
1166 | return 0; | |
1167 | ||
1168 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1169 | err = msg ? msg_errcode(msg) : 0; |
1170 | if (unlikely(err)) { | |
1171 | anc_data[0] = err; | |
1172 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1173 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1174 | if (res) | |
b97bf3fd | 1175 | return res; |
2db9983a AS |
1176 | if (anc_data[1]) { |
1177 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1178 | msg_data(msg)); | |
1179 | if (res) | |
1180 | return res; | |
1181 | } | |
b97bf3fd PL |
1182 | } |
1183 | ||
1184 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1185 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1186 | switch (dest_type) { | |
1187 | case TIPC_NAMED_MSG: | |
3546c750 | 1188 | has_name = 1; |
b97bf3fd PL |
1189 | anc_data[0] = msg_nametype(msg); |
1190 | anc_data[1] = msg_namelower(msg); | |
1191 | anc_data[2] = msg_namelower(msg); | |
1192 | break; | |
1193 | case TIPC_MCAST_MSG: | |
3546c750 | 1194 | has_name = 1; |
b97bf3fd PL |
1195 | anc_data[0] = msg_nametype(msg); |
1196 | anc_data[1] = msg_namelower(msg); | |
1197 | anc_data[2] = msg_nameupper(msg); | |
1198 | break; | |
1199 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1200 | has_name = (tsk->conn_type != 0); |
1201 | anc_data[0] = tsk->conn_type; | |
1202 | anc_data[1] = tsk->conn_instance; | |
1203 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1204 | break; |
1205 | default: | |
3546c750 | 1206 | has_name = 0; |
b97bf3fd | 1207 | } |
2db9983a AS |
1208 | if (has_name) { |
1209 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1210 | if (res) | |
1211 | return res; | |
1212 | } | |
b97bf3fd PL |
1213 | |
1214 | return 0; | |
1215 | } | |
1216 | ||
301bae56 | 1217 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1218 | { |
f2f9800d | 1219 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1220 | struct sk_buff *skb = NULL; |
739f5e4e | 1221 | struct tipc_msg *msg; |
301bae56 JPM |
1222 | u32 peer_port = tsk_peer_port(tsk); |
1223 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1224 | |
301bae56 | 1225 | if (!tsk->connected) |
739f5e4e | 1226 | return; |
c5898636 JPM |
1227 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1228 | dnode, tsk_own_node(tsk), peer_port, | |
1229 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1230 | if (!skb) |
739f5e4e | 1231 | return; |
a6ca1094 | 1232 | msg = buf_msg(skb); |
739f5e4e | 1233 | msg_set_msgcnt(msg, ack); |
af9b028e | 1234 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1235 | } |
1236 | ||
85d3fc94 | 1237 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1238 | { |
1239 | struct sock *sk = sock->sk; | |
1240 | DEFINE_WAIT(wait); | |
85d3fc94 | 1241 | long timeo = *timeop; |
9bbb4ecc YX |
1242 | int err; |
1243 | ||
1244 | for (;;) { | |
1245 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1246 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1247 | if (sock->state == SS_DISCONNECTING) { |
1248 | err = -ENOTCONN; | |
1249 | break; | |
1250 | } | |
1251 | release_sock(sk); | |
1252 | timeo = schedule_timeout(timeo); | |
1253 | lock_sock(sk); | |
1254 | } | |
1255 | err = 0; | |
1256 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1257 | break; | |
9bbb4ecc YX |
1258 | err = -EAGAIN; |
1259 | if (!timeo) | |
1260 | break; | |
143fe22f EH |
1261 | err = sock_intr_errno(timeo); |
1262 | if (signal_pending(current)) | |
1263 | break; | |
9bbb4ecc YX |
1264 | } |
1265 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1266 | *timeop = timeo; |
9bbb4ecc YX |
1267 | return err; |
1268 | } | |
1269 | ||
c4307285 | 1270 | /** |
247f0f3c | 1271 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1272 | * @m: descriptor for message info |
1273 | * @buf_len: total size of user buffer area | |
1274 | * @flags: receive flags | |
c4307285 | 1275 | * |
b97bf3fd PL |
1276 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1277 | * If the complete message doesn't fit in user area, truncate it. | |
1278 | * | |
1279 | * Returns size of returned message data, errno otherwise | |
1280 | */ | |
1b784140 YX |
1281 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1282 | int flags) | |
b97bf3fd | 1283 | { |
0c3141e9 | 1284 | struct sock *sk = sock->sk; |
58ed9442 | 1285 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1286 | struct sk_buff *buf; |
1287 | struct tipc_msg *msg; | |
9bbb4ecc | 1288 | long timeo; |
b97bf3fd PL |
1289 | unsigned int sz; |
1290 | u32 err; | |
1291 | int res; | |
1292 | ||
0c3141e9 | 1293 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1294 | if (unlikely(!buf_len)) |
1295 | return -EINVAL; | |
1296 | ||
0c3141e9 | 1297 | lock_sock(sk); |
b97bf3fd | 1298 | |
0c3141e9 AS |
1299 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1300 | res = -ENOTCONN; | |
b97bf3fd PL |
1301 | goto exit; |
1302 | } | |
1303 | ||
9bbb4ecc | 1304 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1305 | restart: |
b97bf3fd | 1306 | |
0c3141e9 | 1307 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1308 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1309 | if (res) |
1310 | goto exit; | |
b97bf3fd | 1311 | |
0c3141e9 | 1312 | /* Look at first message in receive queue */ |
0c3141e9 | 1313 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1314 | msg = buf_msg(buf); |
1315 | sz = msg_data_sz(msg); | |
1316 | err = msg_errcode(msg); | |
1317 | ||
b97bf3fd | 1318 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1319 | if ((!sz) && (!err)) { |
2e84c60b | 1320 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1321 | goto restart; |
1322 | } | |
1323 | ||
1324 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1325 | set_orig_addr(m, msg); |
1326 | ||
1327 | /* Capture ancillary data (optional) */ | |
301bae56 | 1328 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1329 | if (res) |
b97bf3fd PL |
1330 | goto exit; |
1331 | ||
1332 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1333 | if (!err) { |
1334 | if (unlikely(buf_len < sz)) { | |
1335 | sz = buf_len; | |
1336 | m->msg_flags |= MSG_TRUNC; | |
1337 | } | |
51f3d02b | 1338 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1339 | if (res) |
b97bf3fd | 1340 | goto exit; |
b97bf3fd PL |
1341 | res = sz; |
1342 | } else { | |
1343 | if ((sock->state == SS_READY) || | |
1344 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1345 | res = 0; | |
1346 | else | |
1347 | res = -ECONNRESET; | |
1348 | } | |
1349 | ||
1350 | /* Consume received message (optional) */ | |
b97bf3fd | 1351 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1352 | if ((sock->state != SS_READY) && |
60120526 | 1353 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1354 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1355 | tsk->rcv_unacked = 0; |
1356 | } | |
2e84c60b | 1357 | tsk_advance_rx_queue(sk); |
c4307285 | 1358 | } |
b97bf3fd | 1359 | exit: |
0c3141e9 | 1360 | release_sock(sk); |
b97bf3fd PL |
1361 | return res; |
1362 | } | |
1363 | ||
c4307285 | 1364 | /** |
247f0f3c | 1365 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1366 | * @m: descriptor for message info |
1367 | * @buf_len: total size of user buffer area | |
1368 | * @flags: receive flags | |
c4307285 YH |
1369 | * |
1370 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1371 | * will optionally wait for more; never truncates data. |
1372 | * | |
1373 | * Returns size of returned message data, errno otherwise | |
1374 | */ | |
1b784140 YX |
1375 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1376 | size_t buf_len, int flags) | |
b97bf3fd | 1377 | { |
0c3141e9 | 1378 | struct sock *sk = sock->sk; |
58ed9442 | 1379 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1380 | struct sk_buff *buf; |
1381 | struct tipc_msg *msg; | |
9bbb4ecc | 1382 | long timeo; |
b97bf3fd | 1383 | unsigned int sz; |
3720d40b | 1384 | int sz_to_copy, target, needed; |
b97bf3fd | 1385 | int sz_copied = 0; |
b97bf3fd | 1386 | u32 err; |
0c3141e9 | 1387 | int res = 0; |
b97bf3fd | 1388 | |
0c3141e9 | 1389 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1390 | if (unlikely(!buf_len)) |
1391 | return -EINVAL; | |
1392 | ||
0c3141e9 | 1393 | lock_sock(sk); |
b97bf3fd | 1394 | |
9bbb4ecc | 1395 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1396 | res = -ENOTCONN; |
b97bf3fd PL |
1397 | goto exit; |
1398 | } | |
1399 | ||
3720d40b | 1400 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1401 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1402 | |
617d3c7a | 1403 | restart: |
0c3141e9 | 1404 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1405 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1406 | if (res) |
1407 | goto exit; | |
b97bf3fd | 1408 | |
0c3141e9 | 1409 | /* Look at first message in receive queue */ |
0c3141e9 | 1410 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1411 | msg = buf_msg(buf); |
1412 | sz = msg_data_sz(msg); | |
1413 | err = msg_errcode(msg); | |
1414 | ||
1415 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1416 | if ((!sz) && (!err)) { |
2e84c60b | 1417 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1418 | goto restart; |
1419 | } | |
1420 | ||
1421 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1422 | if (sz_copied == 0) { |
1423 | set_orig_addr(m, msg); | |
301bae56 | 1424 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1425 | if (res) |
b97bf3fd PL |
1426 | goto exit; |
1427 | } | |
1428 | ||
1429 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1430 | if (!err) { |
0232fd0a | 1431 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1432 | |
0232fd0a | 1433 | sz -= offset; |
b97bf3fd PL |
1434 | needed = (buf_len - sz_copied); |
1435 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1436 | |
51f3d02b DM |
1437 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1438 | m, sz_to_copy); | |
0232fd0a | 1439 | if (res) |
b97bf3fd | 1440 | goto exit; |
0232fd0a | 1441 | |
b97bf3fd PL |
1442 | sz_copied += sz_to_copy; |
1443 | ||
1444 | if (sz_to_copy < sz) { | |
1445 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1446 | TIPC_SKB_CB(buf)->handle = |
1447 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1448 | goto exit; |
1449 | } | |
b97bf3fd PL |
1450 | } else { |
1451 | if (sz_copied != 0) | |
1452 | goto exit; /* can't add error msg to valid data */ | |
1453 | ||
1454 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1455 | res = 0; | |
1456 | else | |
1457 | res = -ECONNRESET; | |
1458 | } | |
1459 | ||
1460 | /* Consume received message (optional) */ | |
b97bf3fd | 1461 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1462 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1463 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1464 | tsk->rcv_unacked = 0; |
1465 | } | |
2e84c60b | 1466 | tsk_advance_rx_queue(sk); |
c4307285 | 1467 | } |
b97bf3fd PL |
1468 | |
1469 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1470 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1471 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1472 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1473 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1474 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1475 | goto restart; |
1476 | ||
1477 | exit: | |
0c3141e9 | 1478 | release_sock(sk); |
a3b0a5a9 | 1479 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1480 | } |
1481 | ||
f288bef4 YX |
1482 | /** |
1483 | * tipc_write_space - wake up thread if port congestion is released | |
1484 | * @sk: socket | |
1485 | */ | |
1486 | static void tipc_write_space(struct sock *sk) | |
1487 | { | |
1488 | struct socket_wq *wq; | |
1489 | ||
1490 | rcu_read_lock(); | |
1491 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1492 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1493 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1494 | POLLWRNORM | POLLWRBAND); | |
1495 | rcu_read_unlock(); | |
1496 | } | |
1497 | ||
1498 | /** | |
1499 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1500 | * @sk: socket | |
1501 | * @len: the length of messages | |
1502 | */ | |
676d2369 | 1503 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1504 | { |
1505 | struct socket_wq *wq; | |
1506 | ||
1507 | rcu_read_lock(); | |
1508 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1509 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1510 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1511 | POLLRDNORM | POLLRDBAND); | |
1512 | rcu_read_unlock(); | |
1513 | } | |
1514 | ||
f4195d1e YX |
1515 | static void tipc_sock_destruct(struct sock *sk) |
1516 | { | |
1517 | __skb_queue_purge(&sk->sk_receive_queue); | |
1518 | } | |
1519 | ||
7e6c131e YX |
1520 | /** |
1521 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1522 | * @tsk: TIPC socket |
1186adf7 | 1523 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1524 | * |
cda3696d | 1525 | * Returns true if everything ok, false otherwise |
7e6c131e | 1526 | */ |
cda3696d | 1527 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1528 | { |
58ed9442 | 1529 | struct sock *sk = &tsk->sk; |
f2f9800d | 1530 | struct net *net = sock_net(sk); |
8826cde6 | 1531 | struct socket *sock = sk->sk_socket; |
cda3696d | 1532 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1533 | |
cda3696d JPM |
1534 | if (unlikely(msg_mcast(hdr))) |
1535 | return false; | |
7e6c131e YX |
1536 | |
1537 | switch ((int)sock->state) { | |
1538 | case SS_CONNECTED: | |
cda3696d | 1539 | |
7e6c131e | 1540 | /* Accept only connection-based messages sent by peer */ |
cda3696d JPM |
1541 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
1542 | return false; | |
1543 | ||
1544 | if (unlikely(msg_errcode(hdr))) { | |
1545 | sock->state = SS_DISCONNECTING; | |
1546 | tsk->connected = 0; | |
1547 | /* Let timer expire on it's own */ | |
1548 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1549 | tsk->portid); | |
7e6c131e | 1550 | } |
cda3696d JPM |
1551 | return true; |
1552 | ||
7e6c131e | 1553 | case SS_CONNECTING: |
dadebc00 | 1554 | |
cda3696d JPM |
1555 | /* Accept only ACK or NACK message */ |
1556 | if (unlikely(!msg_connected(hdr))) | |
1557 | return false; | |
dadebc00 | 1558 | |
cda3696d | 1559 | if (unlikely(msg_errcode(hdr))) { |
584d24b3 | 1560 | sock->state = SS_DISCONNECTING; |
2c8d8518 | 1561 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1562 | return true; |
584d24b3 YX |
1563 | } |
1564 | ||
cda3696d | 1565 | if (unlikely(!msg_isdata(hdr))) { |
584d24b3 | 1566 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1567 | sk->sk_err = EINVAL; |
cda3696d | 1568 | return true; |
584d24b3 YX |
1569 | } |
1570 | ||
cda3696d JPM |
1571 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1572 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 JPM |
1573 | sock->state = SS_CONNECTED; |
1574 | ||
cda3696d JPM |
1575 | /* If 'ACK+' message, add to socket receive queue */ |
1576 | if (msg_data_sz(hdr)) | |
1577 | return true; | |
1578 | ||
1579 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1580 | if (waitqueue_active(sk_sleep(sk))) | |
1581 | wake_up_interruptible(sk_sleep(sk)); | |
1582 | ||
1583 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1584 | msg_set_dest_droppable(hdr, 1); | |
1585 | return false; | |
1586 | ||
7e6c131e YX |
1587 | case SS_LISTENING: |
1588 | case SS_UNCONNECTED: | |
cda3696d | 1589 | |
7e6c131e | 1590 | /* Accept only SYN message */ |
cda3696d JPM |
1591 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1592 | return true; | |
7e6c131e YX |
1593 | break; |
1594 | case SS_DISCONNECTING: | |
1595 | break; | |
1596 | default: | |
1597 | pr_err("Unknown socket state %u\n", sock->state); | |
1598 | } | |
cda3696d | 1599 | return false; |
7e6c131e YX |
1600 | } |
1601 | ||
aba79f33 YX |
1602 | /** |
1603 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1604 | * @sk: socket | |
1605 | * @buf: message | |
1606 | * | |
1607 | * For all connection oriented messages, irrespective of importance, | |
1608 | * the default overload value (i.e. 67MB) is set as limit. | |
1609 | * | |
1610 | * For all connectionless messages, by default new queue limits are | |
1611 | * as belows: | |
1612 | * | |
cc79dd1b YX |
1613 | * TIPC_LOW_IMPORTANCE (4 MB) |
1614 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1615 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1616 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1617 | * |
1618 | * Returns overload limit according to corresponding message importance | |
1619 | */ | |
1620 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1621 | { | |
1622 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1623 | |
1624 | if (msg_connected(msg)) | |
0cee6bbe | 1625 | return sysctl_tipc_rmem[2]; |
1626 | ||
1627 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1628 | msg_importance(msg); | |
aba79f33 YX |
1629 | } |
1630 | ||
c4307285 | 1631 | /** |
0c3141e9 AS |
1632 | * filter_rcv - validate incoming message |
1633 | * @sk: socket | |
cda3696d | 1634 | * @skb: pointer to message. |
c4307285 | 1635 | * |
0c3141e9 AS |
1636 | * Enqueues message on receive queue if acceptable; optionally handles |
1637 | * disconnect indication for a connected socket. | |
1638 | * | |
1186adf7 | 1639 | * Called with socket lock already taken |
c4307285 | 1640 | * |
cda3696d | 1641 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1642 | */ |
cda3696d | 1643 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb) |
b97bf3fd | 1644 | { |
0c3141e9 | 1645 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1646 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1647 | struct tipc_msg *hdr = buf_msg(skb); |
1648 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1649 | int err = TIPC_OK; | |
1650 | int usr = msg_user(hdr); | |
b97bf3fd | 1651 | |
cda3696d JPM |
1652 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
1653 | tipc_sk_proto_rcv(tsk, skb); | |
1654 | return false; | |
1186adf7 | 1655 | } |
ec8a2e56 | 1656 | |
cda3696d JPM |
1657 | if (unlikely(usr == SOCK_WAKEUP)) { |
1658 | kfree_skb(skb); | |
50100a5e JPM |
1659 | tsk->link_cong = 0; |
1660 | sk->sk_write_space(sk); | |
cda3696d | 1661 | return false; |
50100a5e JPM |
1662 | } |
1663 | ||
cda3696d JPM |
1664 | /* Drop if illegal message type */ |
1665 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1666 | kfree_skb(skb); | |
1667 | return false; | |
1668 | } | |
0c3141e9 | 1669 | |
cda3696d JPM |
1670 | /* Reject if wrong message type for current socket state */ |
1671 | if (unlikely(sock->state == SS_READY)) { | |
1672 | if (msg_connected(hdr)) { | |
1673 | err = TIPC_ERR_NO_PORT; | |
1674 | goto reject; | |
1675 | } | |
1676 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1677 | err = TIPC_ERR_NO_PORT; | |
1678 | goto reject; | |
b97bf3fd PL |
1679 | } |
1680 | ||
1681 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1682 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1683 | err = TIPC_ERR_OVERLOAD; | |
1684 | goto reject; | |
1685 | } | |
b97bf3fd | 1686 | |
aba79f33 | 1687 | /* Enqueue message */ |
cda3696d JPM |
1688 | TIPC_SKB_CB(skb)->handle = NULL; |
1689 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
1690 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1691 | |
676d2369 | 1692 | sk->sk_data_ready(sk); |
cda3696d JPM |
1693 | return true; |
1694 | ||
1695 | reject: | |
1696 | tipc_sk_respond(sk, skb, err); | |
1697 | return false; | |
0c3141e9 | 1698 | } |
b97bf3fd | 1699 | |
0c3141e9 | 1700 | /** |
4f4482dc | 1701 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1702 | * @sk: socket |
a6ca1094 | 1703 | * @skb: message |
0c3141e9 | 1704 | * |
e3a77561 | 1705 | * Caller must hold socket lock |
0c3141e9 AS |
1706 | * |
1707 | * Returns 0 | |
1708 | */ | |
a6ca1094 | 1709 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1710 | { |
cda3696d | 1711 | unsigned int truesize = skb->truesize; |
0c3141e9 | 1712 | |
cda3696d JPM |
1713 | if (likely(filter_rcv(sk, skb))) |
1714 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); | |
0c3141e9 AS |
1715 | return 0; |
1716 | } | |
1717 | ||
d570d864 | 1718 | /** |
c637c103 JPM |
1719 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1720 | * inputq and try adding them to socket or backlog queue | |
1721 | * @inputq: list of incoming buffers with potentially different destinations | |
1722 | * @sk: socket where the buffers should be enqueued | |
1723 | * @dport: port number for the socket | |
d570d864 JPM |
1724 | * |
1725 | * Caller must hold socket lock | |
d570d864 | 1726 | */ |
cda3696d JPM |
1727 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1728 | u32 dport) | |
d570d864 JPM |
1729 | { |
1730 | unsigned int lim; | |
1731 | atomic_t *dcnt; | |
c637c103 JPM |
1732 | struct sk_buff *skb; |
1733 | unsigned long time_limit = jiffies + 2; | |
1734 | ||
1735 | while (skb_queue_len(inputq)) { | |
51a00daf | 1736 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1737 | return; |
1738 | ||
c637c103 JPM |
1739 | skb = tipc_skb_dequeue(inputq, dport); |
1740 | if (unlikely(!skb)) | |
cda3696d JPM |
1741 | return; |
1742 | ||
1743 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1744 | if (!sock_owned_by_user(sk)) { |
cda3696d JPM |
1745 | filter_rcv(sk, skb); |
1746 | continue; | |
c637c103 | 1747 | } |
cda3696d JPM |
1748 | |
1749 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 JPM |
1750 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
1751 | if (sk->sk_backlog.len) | |
1752 | atomic_set(dcnt, 0); | |
1753 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1754 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1755 | continue; | |
cda3696d JPM |
1756 | |
1757 | /* Overload => reject message back to sender */ | |
1758 | tipc_sk_respond(sk, skb, TIPC_ERR_OVERLOAD); | |
1759 | break; | |
c637c103 | 1760 | } |
d570d864 JPM |
1761 | } |
1762 | ||
0c3141e9 | 1763 | /** |
c637c103 JPM |
1764 | * tipc_sk_rcv - handle a chain of incoming buffers |
1765 | * @inputq: buffer list containing the buffers | |
1766 | * Consumes all buffers in list until inputq is empty | |
1767 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1768 | */ |
cda3696d | 1769 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1770 | { |
c637c103 | 1771 | u32 dnode, dport = 0; |
9871b27f | 1772 | int err; |
9816f061 | 1773 | struct tipc_sock *tsk; |
9816f061 | 1774 | struct sock *sk; |
cda3696d | 1775 | struct sk_buff *skb; |
9816f061 | 1776 | |
c637c103 | 1777 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1778 | dport = tipc_skb_peek_port(inputq, dport); |
1779 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1780 | |
c637c103 JPM |
1781 | if (likely(tsk)) { |
1782 | sk = &tsk->sk; | |
1783 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
cda3696d | 1784 | tipc_sk_enqueue(inputq, sk, dport); |
c637c103 | 1785 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 JPM |
1786 | } |
1787 | sock_put(sk); | |
c637c103 | 1788 | continue; |
c637c103 | 1789 | } |
cda3696d JPM |
1790 | |
1791 | /* No destination socket => dequeue skb if still there */ | |
1792 | skb = tipc_skb_dequeue(inputq, dport); | |
1793 | if (!skb) | |
1794 | return; | |
1795 | ||
1796 | /* Try secondary lookup if unresolved named message */ | |
1797 | err = TIPC_ERR_NO_PORT; | |
1798 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1799 | goto xmit; | |
1800 | ||
1801 | /* Prepare for message rejection */ | |
1802 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1803 | continue; |
e3a77561 | 1804 | xmit: |
cda3696d | 1805 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1806 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1807 | } |
b97bf3fd PL |
1808 | } |
1809 | ||
78eb3a53 YX |
1810 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1811 | { | |
1812 | struct sock *sk = sock->sk; | |
1813 | DEFINE_WAIT(wait); | |
1814 | int done; | |
1815 | ||
1816 | do { | |
1817 | int err = sock_error(sk); | |
1818 | if (err) | |
1819 | return err; | |
1820 | if (!*timeo_p) | |
1821 | return -ETIMEDOUT; | |
1822 | if (signal_pending(current)) | |
1823 | return sock_intr_errno(*timeo_p); | |
1824 | ||
1825 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1826 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1827 | finish_wait(sk_sleep(sk), &wait); | |
1828 | } while (!done); | |
1829 | return 0; | |
1830 | } | |
1831 | ||
b97bf3fd | 1832 | /** |
247f0f3c | 1833 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1834 | * @sock: socket structure |
1835 | * @dest: socket address for destination port | |
1836 | * @destlen: size of socket address data structure | |
0c3141e9 | 1837 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1838 | * |
1839 | * Returns 0 on success, errno otherwise | |
1840 | */ | |
247f0f3c YX |
1841 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1842 | int destlen, int flags) | |
b97bf3fd | 1843 | { |
0c3141e9 | 1844 | struct sock *sk = sock->sk; |
f2f8036e | 1845 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1846 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1847 | struct msghdr m = {NULL,}; | |
f2f8036e | 1848 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1849 | socket_state previous; |
f2f8036e | 1850 | int res = 0; |
b89741a0 | 1851 | |
0c3141e9 AS |
1852 | lock_sock(sk); |
1853 | ||
f2f8036e | 1854 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1855 | if (sock->state == SS_READY) { |
f2f8036e EH |
1856 | if (dst->family == AF_UNSPEC) { |
1857 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); | |
1858 | tsk->connected = 0; | |
610600c8 SL |
1859 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1860 | res = -EINVAL; | |
f2f8036e EH |
1861 | } else { |
1862 | memcpy(&tsk->remote, dest, destlen); | |
1863 | tsk->connected = 1; | |
1864 | } | |
0c3141e9 AS |
1865 | goto exit; |
1866 | } | |
b89741a0 | 1867 | |
b89741a0 AS |
1868 | /* |
1869 | * Reject connection attempt using multicast address | |
1870 | * | |
1871 | * Note: send_msg() validates the rest of the address fields, | |
1872 | * so there's no need to do it here | |
1873 | */ | |
0c3141e9 AS |
1874 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1875 | res = -EINVAL; | |
1876 | goto exit; | |
1877 | } | |
1878 | ||
78eb3a53 | 1879 | previous = sock->state; |
584d24b3 YX |
1880 | switch (sock->state) { |
1881 | case SS_UNCONNECTED: | |
1882 | /* Send a 'SYN-' to destination */ | |
1883 | m.msg_name = dest; | |
1884 | m.msg_namelen = destlen; | |
1885 | ||
1886 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1887 | * indicate send_msg() is never blocked. | |
1888 | */ | |
1889 | if (!timeout) | |
1890 | m.msg_flags = MSG_DONTWAIT; | |
1891 | ||
39a0295f | 1892 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1893 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1894 | goto exit; | |
1895 | ||
1896 | /* Just entered SS_CONNECTING state; the only | |
1897 | * difference is that return value in non-blocking | |
1898 | * case is EINPROGRESS, rather than EALREADY. | |
1899 | */ | |
1900 | res = -EINPROGRESS; | |
584d24b3 | 1901 | case SS_CONNECTING: |
78eb3a53 YX |
1902 | if (previous == SS_CONNECTING) |
1903 | res = -EALREADY; | |
1904 | if (!timeout) | |
1905 | goto exit; | |
1906 | timeout = msecs_to_jiffies(timeout); | |
1907 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1908 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1909 | break; |
1910 | case SS_CONNECTED: | |
1911 | res = -EISCONN; | |
1912 | break; | |
1913 | default: | |
1914 | res = -EINVAL; | |
78eb3a53 | 1915 | break; |
b89741a0 | 1916 | } |
0c3141e9 AS |
1917 | exit: |
1918 | release_sock(sk); | |
b89741a0 | 1919 | return res; |
b97bf3fd PL |
1920 | } |
1921 | ||
c4307285 | 1922 | /** |
247f0f3c | 1923 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1924 | * @sock: socket structure |
1925 | * @len: (unused) | |
c4307285 | 1926 | * |
b97bf3fd PL |
1927 | * Returns 0 on success, errno otherwise |
1928 | */ | |
247f0f3c | 1929 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1930 | { |
0c3141e9 AS |
1931 | struct sock *sk = sock->sk; |
1932 | int res; | |
1933 | ||
1934 | lock_sock(sk); | |
b97bf3fd | 1935 | |
245f3d34 | 1936 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1937 | res = -EINVAL; |
1938 | else { | |
1939 | sock->state = SS_LISTENING; | |
1940 | res = 0; | |
1941 | } | |
1942 | ||
1943 | release_sock(sk); | |
1944 | return res; | |
b97bf3fd PL |
1945 | } |
1946 | ||
6398e23c YX |
1947 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1948 | { | |
1949 | struct sock *sk = sock->sk; | |
1950 | DEFINE_WAIT(wait); | |
1951 | int err; | |
1952 | ||
1953 | /* True wake-one mechanism for incoming connections: only | |
1954 | * one process gets woken up, not the 'whole herd'. | |
1955 | * Since we do not 'race & poll' for established sockets | |
1956 | * anymore, the common case will execute the loop only once. | |
1957 | */ | |
1958 | for (;;) { | |
1959 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1960 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1961 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1962 | release_sock(sk); |
1963 | timeo = schedule_timeout(timeo); | |
1964 | lock_sock(sk); | |
1965 | } | |
1966 | err = 0; | |
1967 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1968 | break; | |
1969 | err = -EINVAL; | |
1970 | if (sock->state != SS_LISTENING) | |
1971 | break; | |
6398e23c YX |
1972 | err = -EAGAIN; |
1973 | if (!timeo) | |
1974 | break; | |
143fe22f EH |
1975 | err = sock_intr_errno(timeo); |
1976 | if (signal_pending(current)) | |
1977 | break; | |
6398e23c YX |
1978 | } |
1979 | finish_wait(sk_sleep(sk), &wait); | |
1980 | return err; | |
1981 | } | |
1982 | ||
c4307285 | 1983 | /** |
247f0f3c | 1984 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1985 | * @sock: listening socket |
1986 | * @newsock: new socket that is to be connected | |
1987 | * @flags: file-related flags associated with socket | |
c4307285 | 1988 | * |
b97bf3fd PL |
1989 | * Returns 0 on success, errno otherwise |
1990 | */ | |
247f0f3c | 1991 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1992 | { |
0fef8f20 | 1993 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1994 | struct sk_buff *buf; |
301bae56 | 1995 | struct tipc_sock *new_tsock; |
0fef8f20 | 1996 | struct tipc_msg *msg; |
6398e23c | 1997 | long timeo; |
0c3141e9 | 1998 | int res; |
b97bf3fd | 1999 | |
0c3141e9 | 2000 | lock_sock(sk); |
b97bf3fd | 2001 | |
0c3141e9 AS |
2002 | if (sock->state != SS_LISTENING) { |
2003 | res = -EINVAL; | |
b97bf3fd PL |
2004 | goto exit; |
2005 | } | |
6398e23c YX |
2006 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2007 | res = tipc_wait_for_accept(sock, timeo); | |
2008 | if (res) | |
2009 | goto exit; | |
0c3141e9 AS |
2010 | |
2011 | buf = skb_peek(&sk->sk_receive_queue); | |
2012 | ||
c5fa7b3c | 2013 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2014 | if (res) |
2015 | goto exit; | |
fdd75ea8 | 2016 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2017 | |
0fef8f20 | 2018 | new_sk = new_sock->sk; |
301bae56 | 2019 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2020 | msg = buf_msg(buf); |
b97bf3fd | 2021 | |
0fef8f20 PG |
2022 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2023 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2024 | ||
2025 | /* | |
2026 | * Reject any stray messages received by new socket | |
2027 | * before the socket lock was taken (very, very unlikely) | |
2028 | */ | |
2e84c60b | 2029 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2030 | |
2031 | /* Connect new socket to it's peer */ | |
301bae56 | 2032 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2033 | new_sock->state = SS_CONNECTED; |
2034 | ||
301bae56 | 2035 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2036 | if (msg_named(msg)) { |
301bae56 JPM |
2037 | new_tsock->conn_type = msg_nametype(msg); |
2038 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2039 | } |
0fef8f20 PG |
2040 | |
2041 | /* | |
2042 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2043 | * Respond to 'SYN+' by queuing it on new socket. | |
2044 | */ | |
2045 | if (!msg_data_sz(msg)) { | |
2046 | struct msghdr m = {NULL,}; | |
2047 | ||
2e84c60b | 2048 | tsk_advance_rx_queue(sk); |
39a0295f | 2049 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2050 | } else { |
2051 | __skb_dequeue(&sk->sk_receive_queue); | |
2052 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2053 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2054 | } |
2055 | release_sock(new_sk); | |
b97bf3fd | 2056 | exit: |
0c3141e9 | 2057 | release_sock(sk); |
b97bf3fd PL |
2058 | return res; |
2059 | } | |
2060 | ||
2061 | /** | |
247f0f3c | 2062 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2063 | * @sock: socket structure |
e247a8f5 | 2064 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2065 | * |
2066 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2067 | * |
b97bf3fd PL |
2068 | * Returns 0 on success, errno otherwise |
2069 | */ | |
247f0f3c | 2070 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2071 | { |
0c3141e9 | 2072 | struct sock *sk = sock->sk; |
f2f9800d | 2073 | struct net *net = sock_net(sk); |
58ed9442 | 2074 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2075 | struct sk_buff *skb; |
cda3696d JPM |
2076 | u32 dnode = tsk_peer_node(tsk); |
2077 | u32 dport = tsk_peer_port(tsk); | |
2078 | u32 onode = tipc_own_addr(net); | |
2079 | u32 oport = tsk->portid; | |
b97bf3fd PL |
2080 | int res; |
2081 | ||
e247a8f5 AS |
2082 | if (how != SHUT_RDWR) |
2083 | return -EINVAL; | |
b97bf3fd | 2084 | |
0c3141e9 | 2085 | lock_sock(sk); |
b97bf3fd PL |
2086 | |
2087 | switch (sock->state) { | |
0c3141e9 | 2088 | case SS_CONNECTING: |
b97bf3fd PL |
2089 | case SS_CONNECTED: |
2090 | ||
b97bf3fd | 2091 | restart: |
bcd3ffd4 JPM |
2092 | dnode = tsk_peer_node(tsk); |
2093 | ||
617d3c7a | 2094 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2095 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2096 | if (skb) { | |
2097 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2098 | kfree_skb(skb); | |
b97bf3fd PL |
2099 | goto restart; |
2100 | } | |
bcd3ffd4 | 2101 | tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 2102 | } else { |
c5898636 | 2103 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
80e44c22 | 2104 | TIPC_CONN_MSG, SHORT_H_SIZE, |
cda3696d JPM |
2105 | 0, dnode, onode, dport, oport, |
2106 | TIPC_CONN_SHUTDOWN); | |
af9b028e | 2107 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2108 | } |
301bae56 | 2109 | tsk->connected = 0; |
0c3141e9 | 2110 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2111 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2112 | /* fall through */ |
2113 | ||
2114 | case SS_DISCONNECTING: | |
2115 | ||
75031151 | 2116 | /* Discard any unreceived messages */ |
57467e56 | 2117 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2118 | |
2119 | /* Wake up anyone sleeping in poll */ | |
2120 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2121 | res = 0; |
2122 | break; | |
2123 | ||
2124 | default: | |
2125 | res = -ENOTCONN; | |
2126 | } | |
2127 | ||
0c3141e9 | 2128 | release_sock(sk); |
b97bf3fd PL |
2129 | return res; |
2130 | } | |
2131 | ||
f2f2a96a | 2132 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2133 | { |
f2f2a96a YX |
2134 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2135 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2136 | struct sk_buff *skb = NULL; |
57289015 | 2137 | u32 peer_port, peer_node; |
c5898636 | 2138 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2139 | |
6c9808ce | 2140 | bh_lock_sock(sk); |
301bae56 | 2141 | if (!tsk->connected) { |
6c9808ce JPM |
2142 | bh_unlock_sock(sk); |
2143 | goto exit; | |
57289015 | 2144 | } |
301bae56 JPM |
2145 | peer_port = tsk_peer_port(tsk); |
2146 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2147 | |
301bae56 | 2148 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
b3be5e3e EH |
2149 | if (!sock_owned_by_user(sk)) { |
2150 | sk->sk_socket->state = SS_DISCONNECTING; | |
2151 | tsk->connected = 0; | |
2152 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
2153 | tsk_peer_port(tsk)); | |
2154 | sk->sk_state_change(sk); | |
2155 | } else { | |
2156 | /* Try again later */ | |
2157 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2158 | } | |
2159 | ||
57289015 | 2160 | } else { |
c5898636 JPM |
2161 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2162 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2163 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2164 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2165 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2166 | } |
2167 | bh_unlock_sock(sk); | |
a6ca1094 | 2168 | if (skb) |
af9b028e | 2169 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2170 | exit: |
07f6c4bc | 2171 | sock_put(sk); |
57289015 JPM |
2172 | } |
2173 | ||
301bae56 | 2174 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2175 | struct tipc_name_seq const *seq) |
2176 | { | |
f2f9800d | 2177 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2178 | struct publication *publ; |
2179 | u32 key; | |
2180 | ||
301bae56 | 2181 | if (tsk->connected) |
0fc87aae | 2182 | return -EINVAL; |
07f6c4bc YX |
2183 | key = tsk->portid + tsk->pub_count + 1; |
2184 | if (key == tsk->portid) | |
0fc87aae JPM |
2185 | return -EADDRINUSE; |
2186 | ||
f2f9800d | 2187 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2188 | scope, tsk->portid, key); |
0fc87aae JPM |
2189 | if (unlikely(!publ)) |
2190 | return -EINVAL; | |
2191 | ||
301bae56 JPM |
2192 | list_add(&publ->pport_list, &tsk->publications); |
2193 | tsk->pub_count++; | |
2194 | tsk->published = 1; | |
0fc87aae JPM |
2195 | return 0; |
2196 | } | |
2197 | ||
301bae56 | 2198 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2199 | struct tipc_name_seq const *seq) |
2200 | { | |
f2f9800d | 2201 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2202 | struct publication *publ; |
2203 | struct publication *safe; | |
2204 | int rc = -EINVAL; | |
2205 | ||
301bae56 | 2206 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2207 | if (seq) { |
2208 | if (publ->scope != scope) | |
2209 | continue; | |
2210 | if (publ->type != seq->type) | |
2211 | continue; | |
2212 | if (publ->lower != seq->lower) | |
2213 | continue; | |
2214 | if (publ->upper != seq->upper) | |
2215 | break; | |
f2f9800d | 2216 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2217 | publ->ref, publ->key); |
2218 | rc = 0; | |
2219 | break; | |
2220 | } | |
f2f9800d | 2221 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2222 | publ->ref, publ->key); |
2223 | rc = 0; | |
2224 | } | |
301bae56 JPM |
2225 | if (list_empty(&tsk->publications)) |
2226 | tsk->published = 0; | |
0fc87aae JPM |
2227 | return rc; |
2228 | } | |
2229 | ||
5a9ee0be JPM |
2230 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2231 | * when we go from standalone to network mode. | |
2232 | */ | |
e05b31f4 | 2233 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2234 | { |
e05b31f4 | 2235 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2236 | const struct bucket_table *tbl; |
2237 | struct rhash_head *pos; | |
2238 | struct tipc_sock *tsk; | |
5a9ee0be | 2239 | struct tipc_msg *msg; |
07f6c4bc | 2240 | int i; |
5a9ee0be | 2241 | |
07f6c4bc | 2242 | rcu_read_lock(); |
e05b31f4 | 2243 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2244 | for (i = 0; i < tbl->size; i++) { |
2245 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2246 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2247 | msg = &tsk->phdr; | |
34747539 YX |
2248 | msg_set_prevnode(msg, tn->own_addr); |
2249 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2250 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2251 | } | |
5a9ee0be | 2252 | } |
07f6c4bc | 2253 | rcu_read_unlock(); |
5a9ee0be JPM |
2254 | } |
2255 | ||
e05b31f4 | 2256 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2257 | { |
e05b31f4 | 2258 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2259 | struct tipc_sock *tsk; |
808d90f9 | 2260 | |
07f6c4bc | 2261 | rcu_read_lock(); |
6cca7289 | 2262 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2263 | if (tsk) |
2264 | sock_hold(&tsk->sk); | |
2265 | rcu_read_unlock(); | |
808d90f9 | 2266 | |
07f6c4bc | 2267 | return tsk; |
808d90f9 JPM |
2268 | } |
2269 | ||
07f6c4bc | 2270 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2271 | { |
e05b31f4 YX |
2272 | struct sock *sk = &tsk->sk; |
2273 | struct net *net = sock_net(sk); | |
2274 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2275 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2276 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2277 | |
07f6c4bc YX |
2278 | while (remaining--) { |
2279 | portid++; | |
2280 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2281 | portid = TIPC_MIN_PORT; | |
2282 | tsk->portid = portid; | |
2283 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2284 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2285 | tsk_rht_params)) | |
07f6c4bc YX |
2286 | return 0; |
2287 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2288 | } |
2289 | ||
07f6c4bc | 2290 | return -1; |
808d90f9 JPM |
2291 | } |
2292 | ||
07f6c4bc | 2293 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2294 | { |
07f6c4bc | 2295 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2296 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2297 | |
6cca7289 | 2298 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2299 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2300 | __sock_put(sk); | |
808d90f9 | 2301 | } |
808d90f9 JPM |
2302 | } |
2303 | ||
6cca7289 HX |
2304 | static const struct rhashtable_params tsk_rht_params = { |
2305 | .nelem_hint = 192, | |
2306 | .head_offset = offsetof(struct tipc_sock, node), | |
2307 | .key_offset = offsetof(struct tipc_sock, portid), | |
2308 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2309 | .max_size = 1048576, |
2310 | .min_size = 256, | |
b5e2c150 | 2311 | .automatic_shrinking = true, |
6cca7289 HX |
2312 | }; |
2313 | ||
e05b31f4 | 2314 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2315 | { |
e05b31f4 | 2316 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2317 | |
2318 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2319 | } |
2320 | ||
e05b31f4 | 2321 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2322 | { |
e05b31f4 YX |
2323 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2324 | ||
07f6c4bc YX |
2325 | /* Wait for socket readers to complete */ |
2326 | synchronize_net(); | |
808d90f9 | 2327 | |
e05b31f4 | 2328 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2329 | } |
2330 | ||
b97bf3fd | 2331 | /** |
247f0f3c | 2332 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2333 | * @sock: socket structure |
2334 | * @lvl: option level | |
2335 | * @opt: option identifier | |
2336 | * @ov: pointer to new option value | |
2337 | * @ol: length of option value | |
c4307285 YH |
2338 | * |
2339 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2340 | * (to ease compatibility). |
c4307285 | 2341 | * |
b97bf3fd PL |
2342 | * Returns 0 on success, errno otherwise |
2343 | */ | |
247f0f3c YX |
2344 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2345 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2346 | { |
0c3141e9 | 2347 | struct sock *sk = sock->sk; |
58ed9442 | 2348 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2349 | u32 value; |
2350 | int res; | |
2351 | ||
c4307285 YH |
2352 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2353 | return 0; | |
b97bf3fd PL |
2354 | if (lvl != SOL_TIPC) |
2355 | return -ENOPROTOOPT; | |
2356 | if (ol < sizeof(value)) | |
2357 | return -EINVAL; | |
2db9983a AS |
2358 | res = get_user(value, (u32 __user *)ov); |
2359 | if (res) | |
b97bf3fd PL |
2360 | return res; |
2361 | ||
0c3141e9 | 2362 | lock_sock(sk); |
c4307285 | 2363 | |
b97bf3fd PL |
2364 | switch (opt) { |
2365 | case TIPC_IMPORTANCE: | |
301bae56 | 2366 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2367 | break; |
2368 | case TIPC_SRC_DROPPABLE: | |
2369 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2370 | tsk_set_unreliable(tsk, value); |
c4307285 | 2371 | else |
b97bf3fd PL |
2372 | res = -ENOPROTOOPT; |
2373 | break; | |
2374 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2375 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2376 | break; |
2377 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2378 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2379 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2380 | break; |
2381 | default: | |
2382 | res = -EINVAL; | |
2383 | } | |
2384 | ||
0c3141e9 AS |
2385 | release_sock(sk); |
2386 | ||
b97bf3fd PL |
2387 | return res; |
2388 | } | |
2389 | ||
2390 | /** | |
247f0f3c | 2391 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2392 | * @sock: socket structure |
2393 | * @lvl: option level | |
2394 | * @opt: option identifier | |
2395 | * @ov: receptacle for option value | |
2396 | * @ol: receptacle for length of option value | |
c4307285 YH |
2397 | * |
2398 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2399 | * (to ease compatibility). |
c4307285 | 2400 | * |
b97bf3fd PL |
2401 | * Returns 0 on success, errno otherwise |
2402 | */ | |
247f0f3c YX |
2403 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2404 | char __user *ov, int __user *ol) | |
b97bf3fd | 2405 | { |
0c3141e9 | 2406 | struct sock *sk = sock->sk; |
58ed9442 | 2407 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2408 | int len; |
b97bf3fd | 2409 | u32 value; |
c4307285 | 2410 | int res; |
b97bf3fd | 2411 | |
c4307285 YH |
2412 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2413 | return put_user(0, ol); | |
b97bf3fd PL |
2414 | if (lvl != SOL_TIPC) |
2415 | return -ENOPROTOOPT; | |
2db9983a AS |
2416 | res = get_user(len, ol); |
2417 | if (res) | |
c4307285 | 2418 | return res; |
b97bf3fd | 2419 | |
0c3141e9 | 2420 | lock_sock(sk); |
b97bf3fd PL |
2421 | |
2422 | switch (opt) { | |
2423 | case TIPC_IMPORTANCE: | |
301bae56 | 2424 | value = tsk_importance(tsk); |
b97bf3fd PL |
2425 | break; |
2426 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2427 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2428 | break; |
2429 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2430 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2431 | break; |
2432 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2433 | value = tsk->conn_timeout; |
0c3141e9 | 2434 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2435 | break; |
0e65967e | 2436 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2437 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2438 | break; |
0e65967e | 2439 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2440 | value = skb_queue_len(&sk->sk_receive_queue); |
2441 | break; | |
b97bf3fd PL |
2442 | default: |
2443 | res = -EINVAL; | |
2444 | } | |
2445 | ||
0c3141e9 AS |
2446 | release_sock(sk); |
2447 | ||
25860c3b PG |
2448 | if (res) |
2449 | return res; /* "get" failed */ | |
b97bf3fd | 2450 | |
25860c3b PG |
2451 | if (len < sizeof(value)) |
2452 | return -EINVAL; | |
2453 | ||
2454 | if (copy_to_user(ov, &value, sizeof(value))) | |
2455 | return -EFAULT; | |
2456 | ||
2457 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2458 | } |
2459 | ||
f2f9800d | 2460 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2461 | { |
f2f9800d | 2462 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2463 | struct tipc_sioc_ln_req lnr; |
2464 | void __user *argp = (void __user *)arg; | |
2465 | ||
2466 | switch (cmd) { | |
2467 | case SIOCGETLINKNAME: | |
2468 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2469 | return -EFAULT; | |
f2f9800d YX |
2470 | if (!tipc_node_get_linkname(sock_net(sk), |
2471 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2472 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2473 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2474 | return -EFAULT; | |
2475 | return 0; | |
2476 | } | |
2477 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2478 | default: |
2479 | return -ENOIOCTLCMD; | |
2480 | } | |
2481 | } | |
2482 | ||
ae86b9e3 BH |
2483 | /* Protocol switches for the various types of TIPC sockets */ |
2484 | ||
bca65eae | 2485 | static const struct proto_ops msg_ops = { |
0e65967e | 2486 | .owner = THIS_MODULE, |
b97bf3fd | 2487 | .family = AF_TIPC, |
247f0f3c YX |
2488 | .release = tipc_release, |
2489 | .bind = tipc_bind, | |
2490 | .connect = tipc_connect, | |
5eee6a6d | 2491 | .socketpair = sock_no_socketpair, |
245f3d34 | 2492 | .accept = sock_no_accept, |
247f0f3c YX |
2493 | .getname = tipc_getname, |
2494 | .poll = tipc_poll, | |
78acb1f9 | 2495 | .ioctl = tipc_ioctl, |
245f3d34 | 2496 | .listen = sock_no_listen, |
247f0f3c YX |
2497 | .shutdown = tipc_shutdown, |
2498 | .setsockopt = tipc_setsockopt, | |
2499 | .getsockopt = tipc_getsockopt, | |
2500 | .sendmsg = tipc_sendmsg, | |
2501 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2502 | .mmap = sock_no_mmap, |
2503 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2504 | }; |
2505 | ||
bca65eae | 2506 | static const struct proto_ops packet_ops = { |
0e65967e | 2507 | .owner = THIS_MODULE, |
b97bf3fd | 2508 | .family = AF_TIPC, |
247f0f3c YX |
2509 | .release = tipc_release, |
2510 | .bind = tipc_bind, | |
2511 | .connect = tipc_connect, | |
5eee6a6d | 2512 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2513 | .accept = tipc_accept, |
2514 | .getname = tipc_getname, | |
2515 | .poll = tipc_poll, | |
78acb1f9 | 2516 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2517 | .listen = tipc_listen, |
2518 | .shutdown = tipc_shutdown, | |
2519 | .setsockopt = tipc_setsockopt, | |
2520 | .getsockopt = tipc_getsockopt, | |
2521 | .sendmsg = tipc_send_packet, | |
2522 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2523 | .mmap = sock_no_mmap, |
2524 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2525 | }; |
2526 | ||
bca65eae | 2527 | static const struct proto_ops stream_ops = { |
0e65967e | 2528 | .owner = THIS_MODULE, |
b97bf3fd | 2529 | .family = AF_TIPC, |
247f0f3c YX |
2530 | .release = tipc_release, |
2531 | .bind = tipc_bind, | |
2532 | .connect = tipc_connect, | |
5eee6a6d | 2533 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2534 | .accept = tipc_accept, |
2535 | .getname = tipc_getname, | |
2536 | .poll = tipc_poll, | |
78acb1f9 | 2537 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2538 | .listen = tipc_listen, |
2539 | .shutdown = tipc_shutdown, | |
2540 | .setsockopt = tipc_setsockopt, | |
2541 | .getsockopt = tipc_getsockopt, | |
2542 | .sendmsg = tipc_send_stream, | |
2543 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2544 | .mmap = sock_no_mmap, |
2545 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2546 | }; |
2547 | ||
bca65eae | 2548 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2549 | .owner = THIS_MODULE, |
b97bf3fd | 2550 | .family = AF_TIPC, |
c5fa7b3c | 2551 | .create = tipc_sk_create |
b97bf3fd PL |
2552 | }; |
2553 | ||
2554 | static struct proto tipc_proto = { | |
2555 | .name = "TIPC", | |
2556 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2557 | .obj_size = sizeof(struct tipc_sock), |
2558 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2559 | }; |
2560 | ||
2561 | /** | |
4323add6 | 2562 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2563 | * |
b97bf3fd PL |
2564 | * Returns 0 on success, errno otherwise |
2565 | */ | |
4323add6 | 2566 | int tipc_socket_init(void) |
b97bf3fd PL |
2567 | { |
2568 | int res; | |
2569 | ||
c4307285 | 2570 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2571 | if (res) { |
2cf8aa19 | 2572 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2573 | goto out; |
2574 | } | |
2575 | ||
2576 | res = sock_register(&tipc_family_ops); | |
2577 | if (res) { | |
2cf8aa19 | 2578 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2579 | proto_unregister(&tipc_proto); |
2580 | goto out; | |
2581 | } | |
b97bf3fd PL |
2582 | out: |
2583 | return res; | |
2584 | } | |
2585 | ||
2586 | /** | |
4323add6 | 2587 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2588 | */ |
4323add6 | 2589 | void tipc_socket_stop(void) |
b97bf3fd | 2590 | { |
b97bf3fd PL |
2591 | sock_unregister(tipc_family_ops.family); |
2592 | proto_unregister(&tipc_proto); | |
2593 | } | |
34b78a12 RA |
2594 | |
2595 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2596 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2597 | { |
2598 | u32 peer_node; | |
2599 | u32 peer_port; | |
2600 | struct nlattr *nest; | |
2601 | ||
2602 | peer_node = tsk_peer_node(tsk); | |
2603 | peer_port = tsk_peer_port(tsk); | |
2604 | ||
2605 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2606 | ||
2607 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2608 | goto msg_full; | |
2609 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2610 | goto msg_full; | |
2611 | ||
2612 | if (tsk->conn_type != 0) { | |
2613 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2614 | goto msg_full; | |
2615 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2616 | goto msg_full; | |
2617 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2618 | goto msg_full; | |
2619 | } | |
2620 | nla_nest_end(skb, nest); | |
2621 | ||
2622 | return 0; | |
2623 | ||
2624 | msg_full: | |
2625 | nla_nest_cancel(skb, nest); | |
2626 | ||
2627 | return -EMSGSIZE; | |
2628 | } | |
2629 | ||
2630 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2631 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2632 | struct tipc_sock *tsk) | |
34b78a12 RA |
2633 | { |
2634 | int err; | |
2635 | void *hdr; | |
2636 | struct nlattr *attrs; | |
34747539 YX |
2637 | struct net *net = sock_net(skb->sk); |
2638 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2639 | |
2640 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2641 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2642 | if (!hdr) |
2643 | goto msg_cancel; | |
2644 | ||
2645 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2646 | if (!attrs) | |
2647 | goto genlmsg_cancel; | |
07f6c4bc | 2648 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2649 | goto attr_msg_cancel; |
34747539 | 2650 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2651 | goto attr_msg_cancel; |
2652 | ||
2653 | if (tsk->connected) { | |
2654 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2655 | if (err) | |
2656 | goto attr_msg_cancel; | |
2657 | } else if (!list_empty(&tsk->publications)) { | |
2658 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2659 | goto attr_msg_cancel; | |
2660 | } | |
2661 | nla_nest_end(skb, attrs); | |
2662 | genlmsg_end(skb, hdr); | |
2663 | ||
2664 | return 0; | |
2665 | ||
2666 | attr_msg_cancel: | |
2667 | nla_nest_cancel(skb, attrs); | |
2668 | genlmsg_cancel: | |
2669 | genlmsg_cancel(skb, hdr); | |
2670 | msg_cancel: | |
2671 | return -EMSGSIZE; | |
2672 | } | |
2673 | ||
2674 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2675 | { | |
2676 | int err; | |
2677 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2678 | const struct bucket_table *tbl; |
2679 | struct rhash_head *pos; | |
e05b31f4 YX |
2680 | struct net *net = sock_net(skb->sk); |
2681 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2682 | u32 tbl_id = cb->args[0]; |
2683 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2684 | |
07f6c4bc | 2685 | rcu_read_lock(); |
e05b31f4 | 2686 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2687 | for (; tbl_id < tbl->size; tbl_id++) { |
2688 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2689 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2690 | if (prev_portid && prev_portid != tsk->portid) { |
2691 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2692 | continue; | |
2693 | } | |
2694 | ||
07f6c4bc | 2695 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2696 | if (err) { |
2697 | prev_portid = tsk->portid; | |
2698 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2699 | goto out; | |
2700 | } | |
2701 | prev_portid = 0; | |
07f6c4bc | 2702 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2703 | } |
34b78a12 | 2704 | } |
d6e164e3 | 2705 | out: |
07f6c4bc | 2706 | rcu_read_unlock(); |
d6e164e3 RA |
2707 | cb->args[0] = tbl_id; |
2708 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2709 | |
2710 | return skb->len; | |
2711 | } | |
1a1a143d RA |
2712 | |
2713 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2714 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2715 | struct netlink_callback *cb, | |
2716 | struct publication *publ) | |
1a1a143d RA |
2717 | { |
2718 | void *hdr; | |
2719 | struct nlattr *attrs; | |
2720 | ||
2721 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2722 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2723 | if (!hdr) |
2724 | goto msg_cancel; | |
2725 | ||
2726 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2727 | if (!attrs) | |
2728 | goto genlmsg_cancel; | |
2729 | ||
2730 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2731 | goto attr_msg_cancel; | |
2732 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2733 | goto attr_msg_cancel; | |
2734 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2735 | goto attr_msg_cancel; | |
2736 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2737 | goto attr_msg_cancel; | |
2738 | ||
2739 | nla_nest_end(skb, attrs); | |
2740 | genlmsg_end(skb, hdr); | |
2741 | ||
2742 | return 0; | |
2743 | ||
2744 | attr_msg_cancel: | |
2745 | nla_nest_cancel(skb, attrs); | |
2746 | genlmsg_cancel: | |
2747 | genlmsg_cancel(skb, hdr); | |
2748 | msg_cancel: | |
2749 | return -EMSGSIZE; | |
2750 | } | |
2751 | ||
2752 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2753 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2754 | struct netlink_callback *cb, | |
2755 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2756 | { |
2757 | int err; | |
2758 | struct publication *p; | |
2759 | ||
2760 | if (*last_publ) { | |
2761 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2762 | if (p->key == *last_publ) | |
2763 | break; | |
2764 | } | |
2765 | if (p->key != *last_publ) { | |
2766 | /* We never set seq or call nl_dump_check_consistent() | |
2767 | * this means that setting prev_seq here will cause the | |
2768 | * consistence check to fail in the netlink callback | |
2769 | * handler. Resulting in the last NLMSG_DONE message | |
2770 | * having the NLM_F_DUMP_INTR flag set. | |
2771 | */ | |
2772 | cb->prev_seq = 1; | |
2773 | *last_publ = 0; | |
2774 | return -EPIPE; | |
2775 | } | |
2776 | } else { | |
2777 | p = list_first_entry(&tsk->publications, struct publication, | |
2778 | pport_list); | |
2779 | } | |
2780 | ||
2781 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2782 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2783 | if (err) { | |
2784 | *last_publ = p->key; | |
2785 | return err; | |
2786 | } | |
2787 | } | |
2788 | *last_publ = 0; | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
2793 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2794 | { | |
2795 | int err; | |
07f6c4bc | 2796 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2797 | u32 last_publ = cb->args[1]; |
2798 | u32 done = cb->args[2]; | |
e05b31f4 | 2799 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2800 | struct tipc_sock *tsk; |
2801 | ||
07f6c4bc | 2802 | if (!tsk_portid) { |
1a1a143d RA |
2803 | struct nlattr **attrs; |
2804 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2805 | ||
2806 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2807 | if (err) | |
2808 | return err; | |
2809 | ||
2810 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2811 | attrs[TIPC_NLA_SOCK], | |
2812 | tipc_nl_sock_policy); | |
2813 | if (err) | |
2814 | return err; | |
2815 | ||
2816 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2817 | return -EINVAL; | |
2818 | ||
07f6c4bc | 2819 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2820 | } |
2821 | ||
2822 | if (done) | |
2823 | return 0; | |
2824 | ||
e05b31f4 | 2825 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2826 | if (!tsk) |
2827 | return -EINVAL; | |
2828 | ||
2829 | lock_sock(&tsk->sk); | |
2830 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2831 | if (!err) | |
2832 | done = 1; | |
2833 | release_sock(&tsk->sk); | |
07f6c4bc | 2834 | sock_put(&tsk->sk); |
1a1a143d | 2835 | |
07f6c4bc | 2836 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2837 | cb->args[1] = last_publ; |
2838 | cb->args[2] = done; | |
2839 | ||
2840 | return skb->len; | |
2841 | } |