Commit | Line | Data |
---|---|---|
17926a79 DH |
1 | /* RxRPC individual remote procedure call handling |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
9b6d5398 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
5a0e3ad6 | 14 | #include <linux/slab.h> |
17926a79 DH |
15 | #include <linux/module.h> |
16 | #include <linux/circ_buf.h> | |
7727640c | 17 | #include <linux/spinlock_types.h> |
17926a79 DH |
18 | #include <net/sock.h> |
19 | #include <net/af_rxrpc.h> | |
20 | #include "ar-internal.h" | |
21 | ||
5873c083 DH |
22 | /* |
23 | * Maximum lifetime of a call (in jiffies). | |
24 | */ | |
dad8aff7 | 25 | unsigned int rxrpc_max_call_lifetime = 60 * HZ; |
5873c083 | 26 | |
5b8848d1 | 27 | const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = { |
f5c17aae | 28 | [RXRPC_CALL_UNINITIALISED] = "Uninit ", |
999b69f8 | 29 | [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn", |
1f8481d1 DH |
30 | [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq", |
31 | [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl", | |
32 | [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl", | |
00e90712 | 33 | [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc", |
1f8481d1 DH |
34 | [RXRPC_CALL_SERVER_SECURING] = "SvSecure", |
35 | [RXRPC_CALL_SERVER_ACCEPTING] = "SvAccept", | |
36 | [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq", | |
37 | [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq", | |
38 | [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl", | |
39 | [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK", | |
40 | [RXRPC_CALL_COMPLETE] = "Complete", | |
f5c17aae DH |
41 | }; |
42 | ||
43 | const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = { | |
44 | [RXRPC_CALL_SUCCEEDED] = "Complete", | |
1f8481d1 DH |
45 | [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", |
46 | [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", | |
f5c17aae | 47 | [RXRPC_CALL_LOCAL_ERROR] = "LocError", |
1f8481d1 | 48 | [RXRPC_CALL_NETWORK_ERROR] = "NetError", |
1f8481d1 DH |
49 | }; |
50 | ||
fff72429 DH |
51 | const char rxrpc_call_traces[rxrpc_call__nr_trace][4] = { |
52 | [rxrpc_call_new_client] = "NWc", | |
53 | [rxrpc_call_new_service] = "NWs", | |
54 | [rxrpc_call_queued] = "QUE", | |
55 | [rxrpc_call_queued_ref] = "QUR", | |
56 | [rxrpc_call_seen] = "SEE", | |
57 | [rxrpc_call_got] = "GOT", | |
fff72429 DH |
58 | [rxrpc_call_got_userid] = "Gus", |
59 | [rxrpc_call_put] = "PUT", | |
fff72429 DH |
60 | [rxrpc_call_put_userid] = "Pus", |
61 | [rxrpc_call_put_noqueue] = "PNQ", | |
62 | }; | |
63 | ||
17926a79 DH |
64 | struct kmem_cache *rxrpc_call_jar; |
65 | LIST_HEAD(rxrpc_calls); | |
66 | DEFINE_RWLOCK(rxrpc_call_lock); | |
17926a79 | 67 | |
248f219c DH |
68 | static void rxrpc_call_timer_expired(unsigned long _call) |
69 | { | |
70 | struct rxrpc_call *call = (struct rxrpc_call *)_call; | |
71 | ||
72 | _enter("%d", call->debug_id); | |
73 | ||
74 | if (call->state < RXRPC_CALL_COMPLETE) | |
75 | rxrpc_queue_call(call); | |
76 | } | |
17926a79 | 77 | |
2341e077 DH |
78 | /* |
79 | * find an extant server call | |
80 | * - called in process context with IRQs enabled | |
81 | */ | |
82 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, | |
83 | unsigned long user_call_ID) | |
84 | { | |
85 | struct rxrpc_call *call; | |
86 | struct rb_node *p; | |
87 | ||
88 | _enter("%p,%lx", rx, user_call_ID); | |
89 | ||
90 | read_lock(&rx->call_lock); | |
91 | ||
92 | p = rx->calls.rb_node; | |
93 | while (p) { | |
94 | call = rb_entry(p, struct rxrpc_call, sock_node); | |
95 | ||
96 | if (user_call_ID < call->user_call_ID) | |
97 | p = p->rb_left; | |
98 | else if (user_call_ID > call->user_call_ID) | |
99 | p = p->rb_right; | |
100 | else | |
101 | goto found_extant_call; | |
102 | } | |
103 | ||
104 | read_unlock(&rx->call_lock); | |
105 | _leave(" = NULL"); | |
106 | return NULL; | |
107 | ||
108 | found_extant_call: | |
fff72429 | 109 | rxrpc_get_call(call, rxrpc_call_got); |
2341e077 DH |
110 | read_unlock(&rx->call_lock); |
111 | _leave(" = %p [%d]", call, atomic_read(&call->usage)); | |
112 | return call; | |
113 | } | |
114 | ||
17926a79 DH |
115 | /* |
116 | * allocate a new call | |
117 | */ | |
00e90712 | 118 | struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) |
17926a79 DH |
119 | { |
120 | struct rxrpc_call *call; | |
121 | ||
122 | call = kmem_cache_zalloc(rxrpc_call_jar, gfp); | |
123 | if (!call) | |
124 | return NULL; | |
125 | ||
248f219c DH |
126 | call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE, |
127 | sizeof(struct sk_buff *), | |
17926a79 | 128 | gfp); |
248f219c DH |
129 | if (!call->rxtx_buffer) |
130 | goto nomem; | |
17926a79 | 131 | |
248f219c DH |
132 | call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp); |
133 | if (!call->rxtx_annotations) | |
134 | goto nomem_2; | |
135 | ||
136 | setup_timer(&call->timer, rxrpc_call_timer_expired, | |
137 | (unsigned long)call); | |
17926a79 | 138 | INIT_WORK(&call->processor, &rxrpc_process_call); |
999b69f8 | 139 | INIT_LIST_HEAD(&call->link); |
45025bce | 140 | INIT_LIST_HEAD(&call->chan_wait_link); |
17926a79 | 141 | INIT_LIST_HEAD(&call->accept_link); |
248f219c DH |
142 | INIT_LIST_HEAD(&call->recvmsg_link); |
143 | INIT_LIST_HEAD(&call->sock_link); | |
45025bce | 144 | init_waitqueue_head(&call->waitq); |
17926a79 DH |
145 | spin_lock_init(&call->lock); |
146 | rwlock_init(&call->state_lock); | |
147 | atomic_set(&call->usage, 1); | |
148 | call->debug_id = atomic_inc_return(&rxrpc_debug_id); | |
17926a79 DH |
149 | |
150 | memset(&call->sock_node, 0xed, sizeof(call->sock_node)); | |
151 | ||
248f219c DH |
152 | /* Leave space in the ring to handle a maxed-out jumbo packet */ |
153 | call->rx_winsize = RXRPC_RXTX_BUFF_SIZE - 1 - 46; | |
154 | call->tx_winsize = 16; | |
155 | call->rx_expect_next = 1; | |
17926a79 | 156 | return call; |
248f219c DH |
157 | |
158 | nomem_2: | |
159 | kfree(call->rxtx_buffer); | |
160 | nomem: | |
161 | kmem_cache_free(rxrpc_call_jar, call); | |
162 | return NULL; | |
17926a79 DH |
163 | } |
164 | ||
165 | /* | |
999b69f8 | 166 | * Allocate a new client call. |
17926a79 | 167 | */ |
248f219c | 168 | static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx, |
aa390bbe | 169 | gfp_t gfp) |
17926a79 DH |
170 | { |
171 | struct rxrpc_call *call; | |
17926a79 DH |
172 | |
173 | _enter(""); | |
174 | ||
17926a79 DH |
175 | call = rxrpc_alloc_call(gfp); |
176 | if (!call) | |
177 | return ERR_PTR(-ENOMEM); | |
999b69f8 | 178 | call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; |
999b69f8 | 179 | call->service_id = srx->srx_service; |
999b69f8 DH |
180 | |
181 | _leave(" = %p", call); | |
182 | return call; | |
183 | } | |
184 | ||
185 | /* | |
248f219c | 186 | * Initiate the call ack/resend/expiry timer. |
999b69f8 | 187 | */ |
248f219c | 188 | static void rxrpc_start_call_timer(struct rxrpc_call *call) |
999b69f8 | 189 | { |
248f219c DH |
190 | unsigned long expire_at; |
191 | ||
192 | expire_at = jiffies + rxrpc_max_call_lifetime; | |
193 | call->expire_at = expire_at; | |
194 | call->ack_at = expire_at; | |
195 | call->resend_at = expire_at; | |
196 | call->timer.expires = expire_at; | |
197 | add_timer(&call->timer); | |
17926a79 DH |
198 | } |
199 | ||
200 | /* | |
201 | * set up a call for the given data | |
202 | * - called in process context with IRQs enabled | |
203 | */ | |
2341e077 | 204 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, |
19ffa01c | 205 | struct rxrpc_conn_parameters *cp, |
999b69f8 | 206 | struct sockaddr_rxrpc *srx, |
17926a79 | 207 | unsigned long user_call_ID, |
17926a79 DH |
208 | gfp_t gfp) |
209 | { | |
2341e077 DH |
210 | struct rxrpc_call *call, *xcall; |
211 | struct rb_node *parent, **pp; | |
e34d4234 | 212 | const void *here = __builtin_return_address(0); |
999b69f8 | 213 | int ret; |
17926a79 | 214 | |
999b69f8 | 215 | _enter("%p,%lx", rx, user_call_ID); |
17926a79 | 216 | |
248f219c | 217 | call = rxrpc_alloc_client_call(srx, gfp); |
2341e077 DH |
218 | if (IS_ERR(call)) { |
219 | _leave(" = %ld", PTR_ERR(call)); | |
220 | return call; | |
17926a79 DH |
221 | } |
222 | ||
2ab27215 DH |
223 | trace_rxrpc_call(call, 0, atomic_read(&call->usage), here, |
224 | (const void *)user_call_ID); | |
e34d4234 | 225 | |
999b69f8 | 226 | /* Publish the call, even though it is incompletely set up as yet */ |
2341e077 DH |
227 | call->user_call_ID = user_call_ID; |
228 | __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); | |
17926a79 DH |
229 | |
230 | write_lock(&rx->call_lock); | |
231 | ||
232 | pp = &rx->calls.rb_node; | |
233 | parent = NULL; | |
234 | while (*pp) { | |
235 | parent = *pp; | |
2341e077 | 236 | xcall = rb_entry(parent, struct rxrpc_call, sock_node); |
17926a79 | 237 | |
2341e077 | 238 | if (user_call_ID < xcall->user_call_ID) |
17926a79 | 239 | pp = &(*pp)->rb_left; |
2341e077 | 240 | else if (user_call_ID > xcall->user_call_ID) |
17926a79 DH |
241 | pp = &(*pp)->rb_right; |
242 | else | |
2341e077 | 243 | goto found_user_ID_now_present; |
17926a79 DH |
244 | } |
245 | ||
248f219c | 246 | rcu_assign_pointer(call->socket, rx); |
fff72429 | 247 | rxrpc_get_call(call, rxrpc_call_got_userid); |
17926a79 DH |
248 | rb_link_node(&call->sock_node, parent, pp); |
249 | rb_insert_color(&call->sock_node, &rx->calls); | |
248f219c DH |
250 | list_add(&call->sock_link, &rx->sock_calls); |
251 | ||
17926a79 DH |
252 | write_unlock(&rx->call_lock); |
253 | ||
248f219c | 254 | write_lock(&rxrpc_call_lock); |
17926a79 | 255 | list_add_tail(&call->link, &rxrpc_calls); |
248f219c | 256 | write_unlock(&rxrpc_call_lock); |
17926a79 | 257 | |
248f219c DH |
258 | /* Set up or get a connection record and set the protocol parameters, |
259 | * including channel number and call ID. | |
260 | */ | |
261 | ret = rxrpc_connect_call(call, cp, srx, gfp); | |
999b69f8 DH |
262 | if (ret < 0) |
263 | goto error; | |
264 | ||
248f219c DH |
265 | spin_lock_bh(&call->conn->params.peer->lock); |
266 | hlist_add_head(&call->error_link, | |
267 | &call->conn->params.peer->error_targets); | |
268 | spin_unlock_bh(&call->conn->params.peer->lock); | |
269 | ||
270 | rxrpc_start_call_timer(call); | |
271 | ||
17926a79 DH |
272 | _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); |
273 | ||
274 | _leave(" = %p [new]", call); | |
275 | return call; | |
276 | ||
999b69f8 DH |
277 | error: |
278 | write_lock(&rx->call_lock); | |
279 | rb_erase(&call->sock_node, &rx->calls); | |
280 | write_unlock(&rx->call_lock); | |
fff72429 | 281 | rxrpc_put_call(call, rxrpc_call_put_userid); |
999b69f8 | 282 | |
248f219c | 283 | write_lock(&rxrpc_call_lock); |
d1e858c5 | 284 | list_del_init(&call->link); |
248f219c | 285 | write_unlock(&rxrpc_call_lock); |
999b69f8 | 286 | |
8d94aa38 DH |
287 | error_out: |
288 | __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, | |
289 | RX_CALL_DEAD, ret); | |
17b963e3 | 290 | set_bit(RXRPC_CALL_RELEASED, &call->flags); |
fff72429 | 291 | rxrpc_put_call(call, rxrpc_call_put); |
999b69f8 DH |
292 | _leave(" = %d", ret); |
293 | return ERR_PTR(ret); | |
294 | ||
2341e077 DH |
295 | /* We unexpectedly found the user ID in the list after taking |
296 | * the call_lock. This shouldn't happen unless the user races | |
297 | * with itself and tries to add the same user ID twice at the | |
298 | * same time in different threads. | |
299 | */ | |
300 | found_user_ID_now_present: | |
17926a79 | 301 | write_unlock(&rx->call_lock); |
8d94aa38 DH |
302 | ret = -EEXIST; |
303 | goto error_out; | |
17926a79 DH |
304 | } |
305 | ||
306 | /* | |
248f219c DH |
307 | * Set up an incoming call. call->conn points to the connection. |
308 | * This is called in BH context and isn't allowed to fail. | |
17926a79 | 309 | */ |
248f219c DH |
310 | void rxrpc_incoming_call(struct rxrpc_sock *rx, |
311 | struct rxrpc_call *call, | |
312 | struct sk_buff *skb) | |
17926a79 | 313 | { |
248f219c | 314 | struct rxrpc_connection *conn = call->conn; |
42886ffe | 315 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
248f219c | 316 | u32 chan; |
17926a79 | 317 | |
248f219c | 318 | _enter(",%d", call->conn->debug_id); |
e34d4234 | 319 | |
248f219c DH |
320 | rcu_assign_pointer(call->socket, rx); |
321 | call->call_id = sp->hdr.callNumber; | |
322 | call->service_id = sp->hdr.serviceId; | |
323 | call->cid = sp->hdr.cid; | |
324 | call->state = RXRPC_CALL_SERVER_ACCEPTING; | |
325 | if (sp->hdr.securityIndex > 0) | |
326 | call->state = RXRPC_CALL_SERVER_SECURING; | |
327 | ||
328 | /* Set the channel for this call. We don't get channel_lock as we're | |
329 | * only defending against the data_ready handler (which we're called | |
330 | * from) and the RESPONSE packet parser (which is only really | |
331 | * interested in call_counter and can cope with a disagreement with the | |
332 | * call pointer). | |
a1399f8b | 333 | */ |
248f219c DH |
334 | chan = sp->hdr.cid & RXRPC_CHANNELMASK; |
335 | conn->channels[chan].call_counter = call->call_id; | |
336 | conn->channels[chan].call_id = call->call_id; | |
a1399f8b | 337 | rcu_assign_pointer(conn->channels[chan].call, call); |
17926a79 | 338 | |
85f32278 DH |
339 | spin_lock(&conn->params.peer->lock); |
340 | hlist_add_head(&call->error_link, &conn->params.peer->error_targets); | |
341 | spin_unlock(&conn->params.peer->lock); | |
17926a79 | 342 | |
17926a79 DH |
343 | _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); |
344 | ||
248f219c DH |
345 | rxrpc_start_call_timer(call); |
346 | _leave(""); | |
17926a79 DH |
347 | } |
348 | ||
8d94aa38 DH |
349 | /* |
350 | * Queue a call's work processor, getting a ref to pass to the work queue. | |
351 | */ | |
352 | bool rxrpc_queue_call(struct rxrpc_call *call) | |
353 | { | |
354 | const void *here = __builtin_return_address(0); | |
355 | int n = __atomic_add_unless(&call->usage, 1, 0); | |
8d94aa38 DH |
356 | if (n == 0) |
357 | return false; | |
358 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 359 | trace_rxrpc_call(call, rxrpc_call_queued, n + 1, here, NULL); |
8d94aa38 DH |
360 | else |
361 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
362 | return true; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Queue a call's work processor, passing the callers ref to the work queue. | |
367 | */ | |
368 | bool __rxrpc_queue_call(struct rxrpc_call *call) | |
369 | { | |
370 | const void *here = __builtin_return_address(0); | |
371 | int n = atomic_read(&call->usage); | |
8d94aa38 DH |
372 | ASSERTCMP(n, >=, 1); |
373 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 374 | trace_rxrpc_call(call, rxrpc_call_queued_ref, n, here, NULL); |
8d94aa38 DH |
375 | else |
376 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
377 | return true; | |
378 | } | |
379 | ||
e34d4234 DH |
380 | /* |
381 | * Note the re-emergence of a call. | |
382 | */ | |
383 | void rxrpc_see_call(struct rxrpc_call *call) | |
384 | { | |
385 | const void *here = __builtin_return_address(0); | |
386 | if (call) { | |
387 | int n = atomic_read(&call->usage); | |
e34d4234 | 388 | |
2ab27215 | 389 | trace_rxrpc_call(call, rxrpc_call_seen, n, here, NULL); |
e34d4234 DH |
390 | } |
391 | } | |
392 | ||
393 | /* | |
394 | * Note the addition of a ref on a call. | |
395 | */ | |
fff72429 | 396 | void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
e34d4234 DH |
397 | { |
398 | const void *here = __builtin_return_address(0); | |
399 | int n = atomic_inc_return(&call->usage); | |
e34d4234 | 400 | |
2ab27215 | 401 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
402 | } |
403 | ||
404 | /* | |
248f219c | 405 | * Detach a call from its owning socket. |
e34d4234 | 406 | */ |
248f219c | 407 | void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) |
e34d4234 | 408 | { |
248f219c DH |
409 | struct rxrpc_connection *conn = call->conn; |
410 | bool put = false; | |
411 | int i; | |
e34d4234 | 412 | |
248f219c | 413 | _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage)); |
e34d4234 | 414 | |
248f219c | 415 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 416 | |
e34d4234 DH |
417 | rxrpc_see_call(call); |
418 | ||
17926a79 DH |
419 | spin_lock_bh(&call->lock); |
420 | if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) | |
421 | BUG(); | |
422 | spin_unlock_bh(&call->lock); | |
423 | ||
248f219c | 424 | del_timer_sync(&call->timer); |
17926a79 | 425 | |
248f219c DH |
426 | /* Make sure we don't get any more notifications */ |
427 | write_lock_bh(&rx->recvmsg_lock); | |
e653cfe4 | 428 | |
248f219c | 429 | if (!list_empty(&call->recvmsg_link)) { |
17926a79 DH |
430 | _debug("unlinking once-pending call %p { e=%lx f=%lx }", |
431 | call, call->events, call->flags); | |
248f219c DH |
432 | list_del(&call->recvmsg_link); |
433 | put = true; | |
434 | } | |
435 | ||
436 | /* list_empty() must return false in rxrpc_notify_socket() */ | |
437 | call->recvmsg_link.next = NULL; | |
438 | call->recvmsg_link.prev = NULL; | |
439 | ||
440 | write_unlock_bh(&rx->recvmsg_lock); | |
441 | if (put) | |
442 | rxrpc_put_call(call, rxrpc_call_put); | |
443 | ||
444 | write_lock(&rx->call_lock); | |
445 | ||
446 | if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { | |
17926a79 DH |
447 | rb_erase(&call->sock_node, &rx->calls); |
448 | memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); | |
8d94aa38 | 449 | rxrpc_put_call(call, rxrpc_call_put_userid); |
17926a79 | 450 | } |
17926a79 | 451 | |
248f219c DH |
452 | list_del(&call->sock_link); |
453 | write_unlock(&rx->call_lock); | |
454 | ||
455 | _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); | |
456 | ||
457 | if (conn) | |
8d94aa38 | 458 | rxrpc_disconnect_call(call); |
e653cfe4 | 459 | |
248f219c DH |
460 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) { |
461 | rxrpc_free_skb(call->rxtx_buffer[i]); | |
462 | call->rxtx_buffer[i] = NULL; | |
17926a79 | 463 | } |
17926a79 | 464 | |
00e90712 DH |
465 | /* We have to release the prealloc backlog ref */ |
466 | if (rxrpc_is_service_call(call)) | |
467 | rxrpc_put_call(call, rxrpc_call_put); | |
17926a79 DH |
468 | _leave(""); |
469 | } | |
470 | ||
17926a79 DH |
471 | /* |
472 | * release all the calls associated with a socket | |
473 | */ | |
474 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) | |
475 | { | |
476 | struct rxrpc_call *call; | |
17926a79 DH |
477 | |
478 | _enter("%p", rx); | |
479 | ||
248f219c DH |
480 | while (!list_empty(&rx->sock_calls)) { |
481 | call = list_entry(rx->sock_calls.next, | |
482 | struct rxrpc_call, sock_link); | |
483 | rxrpc_get_call(call, rxrpc_call_got); | |
484 | rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, ECONNRESET); | |
485 | rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT); | |
8d94aa38 | 486 | rxrpc_release_call(rx, call); |
248f219c | 487 | rxrpc_put_call(call, rxrpc_call_put); |
f36b5e44 DH |
488 | } |
489 | ||
17926a79 DH |
490 | _leave(""); |
491 | } | |
492 | ||
493 | /* | |
494 | * release a call | |
495 | */ | |
fff72429 | 496 | void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
17926a79 | 497 | { |
e34d4234 | 498 | const void *here = __builtin_return_address(0); |
2ab27215 | 499 | int n; |
17926a79 | 500 | |
e34d4234 | 501 | ASSERT(call != NULL); |
17926a79 | 502 | |
e34d4234 | 503 | n = atomic_dec_return(&call->usage); |
2ab27215 | 504 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
505 | ASSERTCMP(n, >=, 0); |
506 | if (n == 0) { | |
507 | _debug("call %d dead", call->debug_id); | |
248f219c | 508 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 509 | |
248f219c DH |
510 | write_lock(&rxrpc_call_lock); |
511 | list_del_init(&call->link); | |
512 | write_unlock(&rxrpc_call_lock); | |
e34d4234 | 513 | |
8d94aa38 | 514 | rxrpc_cleanup_call(call); |
17926a79 | 515 | } |
17926a79 DH |
516 | } |
517 | ||
dee46364 DH |
518 | /* |
519 | * Final call destruction under RCU. | |
520 | */ | |
521 | static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) | |
522 | { | |
523 | struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); | |
524 | ||
df5d8bf7 | 525 | rxrpc_put_peer(call->peer); |
248f219c DH |
526 | kfree(call->rxtx_buffer); |
527 | kfree(call->rxtx_annotations); | |
dee46364 DH |
528 | kmem_cache_free(rxrpc_call_jar, call); |
529 | } | |
530 | ||
17926a79 DH |
531 | /* |
532 | * clean up a call | |
533 | */ | |
00e90712 | 534 | void rxrpc_cleanup_call(struct rxrpc_call *call) |
17926a79 | 535 | { |
248f219c | 536 | int i; |
17926a79 | 537 | |
248f219c | 538 | _net("DESTROY CALL %d", call->debug_id); |
17926a79 DH |
539 | |
540 | memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); | |
541 | ||
248f219c | 542 | del_timer_sync(&call->timer); |
17926a79 | 543 | |
8d94aa38 | 544 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 545 | ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); |
e653cfe4 | 546 | ASSERTCMP(call->conn, ==, NULL); |
17926a79 | 547 | |
248f219c DH |
548 | /* Clean up the Rx/Tx buffer */ |
549 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) | |
550 | rxrpc_free_skb(call->rxtx_buffer[i]); | |
17926a79 DH |
551 | |
552 | rxrpc_free_skb(call->tx_pending); | |
553 | ||
dee46364 | 554 | call_rcu(&call->rcu, rxrpc_rcu_destroy_call); |
17926a79 DH |
555 | } |
556 | ||
557 | /* | |
8d94aa38 | 558 | * Make sure that all calls are gone. |
17926a79 DH |
559 | */ |
560 | void __exit rxrpc_destroy_all_calls(void) | |
561 | { | |
562 | struct rxrpc_call *call; | |
563 | ||
564 | _enter(""); | |
8d94aa38 DH |
565 | |
566 | if (list_empty(&rxrpc_calls)) | |
567 | return; | |
248f219c DH |
568 | |
569 | write_lock(&rxrpc_call_lock); | |
17926a79 DH |
570 | |
571 | while (!list_empty(&rxrpc_calls)) { | |
572 | call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); | |
573 | _debug("Zapping call %p", call); | |
574 | ||
e34d4234 | 575 | rxrpc_see_call(call); |
17926a79 DH |
576 | list_del_init(&call->link); |
577 | ||
248f219c | 578 | pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", |
8d94aa38 | 579 | call, atomic_read(&call->usage), |
8d94aa38 DH |
580 | rxrpc_call_states[call->state], |
581 | call->flags, call->events); | |
17926a79 | 582 | |
248f219c | 583 | write_unlock(&rxrpc_call_lock); |
17926a79 | 584 | cond_resched(); |
248f219c | 585 | write_lock(&rxrpc_call_lock); |
17926a79 DH |
586 | } |
587 | ||
248f219c | 588 | write_unlock(&rxrpc_call_lock); |
17926a79 | 589 | } |