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Commit | Line | Data |
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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", | |
a84a46d7 DH |
56 | [rxrpc_call_connected] = "CON", |
57 | [rxrpc_call_release] = "RLS", | |
fff72429 DH |
58 | [rxrpc_call_seen] = "SEE", |
59 | [rxrpc_call_got] = "GOT", | |
fff72429 | 60 | [rxrpc_call_got_userid] = "Gus", |
cbd00891 | 61 | [rxrpc_call_got_kernel] = "Gke", |
fff72429 | 62 | [rxrpc_call_put] = "PUT", |
fff72429 | 63 | [rxrpc_call_put_userid] = "Pus", |
cbd00891 | 64 | [rxrpc_call_put_kernel] = "Pke", |
fff72429 | 65 | [rxrpc_call_put_noqueue] = "PNQ", |
a84a46d7 | 66 | [rxrpc_call_error] = "*E*", |
fff72429 DH |
67 | }; |
68 | ||
17926a79 DH |
69 | struct kmem_cache *rxrpc_call_jar; |
70 | LIST_HEAD(rxrpc_calls); | |
71 | DEFINE_RWLOCK(rxrpc_call_lock); | |
17926a79 | 72 | |
248f219c DH |
73 | static void rxrpc_call_timer_expired(unsigned long _call) |
74 | { | |
75 | struct rxrpc_call *call = (struct rxrpc_call *)_call; | |
76 | ||
77 | _enter("%d", call->debug_id); | |
78 | ||
79 | if (call->state < RXRPC_CALL_COMPLETE) | |
80 | rxrpc_queue_call(call); | |
81 | } | |
17926a79 | 82 | |
2341e077 DH |
83 | /* |
84 | * find an extant server call | |
85 | * - called in process context with IRQs enabled | |
86 | */ | |
87 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, | |
88 | unsigned long user_call_ID) | |
89 | { | |
90 | struct rxrpc_call *call; | |
91 | struct rb_node *p; | |
92 | ||
93 | _enter("%p,%lx", rx, user_call_ID); | |
94 | ||
95 | read_lock(&rx->call_lock); | |
96 | ||
97 | p = rx->calls.rb_node; | |
98 | while (p) { | |
99 | call = rb_entry(p, struct rxrpc_call, sock_node); | |
100 | ||
101 | if (user_call_ID < call->user_call_ID) | |
102 | p = p->rb_left; | |
103 | else if (user_call_ID > call->user_call_ID) | |
104 | p = p->rb_right; | |
105 | else | |
106 | goto found_extant_call; | |
107 | } | |
108 | ||
109 | read_unlock(&rx->call_lock); | |
110 | _leave(" = NULL"); | |
111 | return NULL; | |
112 | ||
113 | found_extant_call: | |
fff72429 | 114 | rxrpc_get_call(call, rxrpc_call_got); |
2341e077 DH |
115 | read_unlock(&rx->call_lock); |
116 | _leave(" = %p [%d]", call, atomic_read(&call->usage)); | |
117 | return call; | |
118 | } | |
119 | ||
17926a79 DH |
120 | /* |
121 | * allocate a new call | |
122 | */ | |
00e90712 | 123 | struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) |
17926a79 DH |
124 | { |
125 | struct rxrpc_call *call; | |
126 | ||
127 | call = kmem_cache_zalloc(rxrpc_call_jar, gfp); | |
128 | if (!call) | |
129 | return NULL; | |
130 | ||
248f219c DH |
131 | call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE, |
132 | sizeof(struct sk_buff *), | |
17926a79 | 133 | gfp); |
248f219c DH |
134 | if (!call->rxtx_buffer) |
135 | goto nomem; | |
17926a79 | 136 | |
248f219c DH |
137 | call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp); |
138 | if (!call->rxtx_annotations) | |
139 | goto nomem_2; | |
140 | ||
141 | setup_timer(&call->timer, rxrpc_call_timer_expired, | |
142 | (unsigned long)call); | |
17926a79 | 143 | INIT_WORK(&call->processor, &rxrpc_process_call); |
999b69f8 | 144 | INIT_LIST_HEAD(&call->link); |
45025bce | 145 | INIT_LIST_HEAD(&call->chan_wait_link); |
17926a79 | 146 | INIT_LIST_HEAD(&call->accept_link); |
248f219c DH |
147 | INIT_LIST_HEAD(&call->recvmsg_link); |
148 | INIT_LIST_HEAD(&call->sock_link); | |
45025bce | 149 | init_waitqueue_head(&call->waitq); |
17926a79 DH |
150 | spin_lock_init(&call->lock); |
151 | rwlock_init(&call->state_lock); | |
152 | atomic_set(&call->usage, 1); | |
153 | call->debug_id = atomic_inc_return(&rxrpc_debug_id); | |
17926a79 DH |
154 | |
155 | memset(&call->sock_node, 0xed, sizeof(call->sock_node)); | |
156 | ||
248f219c | 157 | /* Leave space in the ring to handle a maxed-out jumbo packet */ |
75e42126 | 158 | call->rx_winsize = rxrpc_rx_window_size; |
248f219c DH |
159 | call->tx_winsize = 16; |
160 | call->rx_expect_next = 1; | |
17926a79 | 161 | return call; |
248f219c DH |
162 | |
163 | nomem_2: | |
164 | kfree(call->rxtx_buffer); | |
165 | nomem: | |
166 | kmem_cache_free(rxrpc_call_jar, call); | |
167 | return NULL; | |
17926a79 DH |
168 | } |
169 | ||
170 | /* | |
999b69f8 | 171 | * Allocate a new client call. |
17926a79 | 172 | */ |
248f219c | 173 | static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx, |
aa390bbe | 174 | gfp_t gfp) |
17926a79 DH |
175 | { |
176 | struct rxrpc_call *call; | |
17926a79 DH |
177 | |
178 | _enter(""); | |
179 | ||
17926a79 DH |
180 | call = rxrpc_alloc_call(gfp); |
181 | if (!call) | |
182 | return ERR_PTR(-ENOMEM); | |
999b69f8 | 183 | call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; |
999b69f8 | 184 | call->service_id = srx->srx_service; |
71f3ca40 | 185 | call->tx_phase = true; |
999b69f8 DH |
186 | |
187 | _leave(" = %p", call); | |
188 | return call; | |
189 | } | |
190 | ||
191 | /* | |
248f219c | 192 | * Initiate the call ack/resend/expiry timer. |
999b69f8 | 193 | */ |
248f219c | 194 | static void rxrpc_start_call_timer(struct rxrpc_call *call) |
999b69f8 | 195 | { |
248f219c DH |
196 | unsigned long expire_at; |
197 | ||
198 | expire_at = jiffies + rxrpc_max_call_lifetime; | |
199 | call->expire_at = expire_at; | |
200 | call->ack_at = expire_at; | |
201 | call->resend_at = expire_at; | |
01a88f7f DH |
202 | call->timer.expires = expire_at + 1; |
203 | rxrpc_set_timer(call); | |
17926a79 DH |
204 | } |
205 | ||
206 | /* | |
207 | * set up a call for the given data | |
208 | * - called in process context with IRQs enabled | |
209 | */ | |
2341e077 | 210 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, |
19ffa01c | 211 | struct rxrpc_conn_parameters *cp, |
999b69f8 | 212 | struct sockaddr_rxrpc *srx, |
17926a79 | 213 | unsigned long user_call_ID, |
17926a79 DH |
214 | gfp_t gfp) |
215 | { | |
2341e077 DH |
216 | struct rxrpc_call *call, *xcall; |
217 | struct rb_node *parent, **pp; | |
e34d4234 | 218 | const void *here = __builtin_return_address(0); |
999b69f8 | 219 | int ret; |
17926a79 | 220 | |
999b69f8 | 221 | _enter("%p,%lx", rx, user_call_ID); |
17926a79 | 222 | |
248f219c | 223 | call = rxrpc_alloc_client_call(srx, gfp); |
2341e077 DH |
224 | if (IS_ERR(call)) { |
225 | _leave(" = %ld", PTR_ERR(call)); | |
226 | return call; | |
17926a79 DH |
227 | } |
228 | ||
a84a46d7 DH |
229 | trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage), |
230 | here, (const void *)user_call_ID); | |
e34d4234 | 231 | |
999b69f8 | 232 | /* Publish the call, even though it is incompletely set up as yet */ |
17926a79 DH |
233 | write_lock(&rx->call_lock); |
234 | ||
235 | pp = &rx->calls.rb_node; | |
236 | parent = NULL; | |
237 | while (*pp) { | |
238 | parent = *pp; | |
2341e077 | 239 | xcall = rb_entry(parent, struct rxrpc_call, sock_node); |
17926a79 | 240 | |
2341e077 | 241 | if (user_call_ID < xcall->user_call_ID) |
17926a79 | 242 | pp = &(*pp)->rb_left; |
2341e077 | 243 | else if (user_call_ID > xcall->user_call_ID) |
17926a79 DH |
244 | pp = &(*pp)->rb_right; |
245 | else | |
357f5ef6 | 246 | goto error_dup_user_ID; |
17926a79 DH |
247 | } |
248 | ||
248f219c | 249 | rcu_assign_pointer(call->socket, rx); |
357f5ef6 DH |
250 | call->user_call_ID = user_call_ID; |
251 | __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); | |
fff72429 | 252 | rxrpc_get_call(call, rxrpc_call_got_userid); |
17926a79 DH |
253 | rb_link_node(&call->sock_node, parent, pp); |
254 | rb_insert_color(&call->sock_node, &rx->calls); | |
248f219c DH |
255 | list_add(&call->sock_link, &rx->sock_calls); |
256 | ||
17926a79 DH |
257 | write_unlock(&rx->call_lock); |
258 | ||
248f219c | 259 | write_lock(&rxrpc_call_lock); |
17926a79 | 260 | list_add_tail(&call->link, &rxrpc_calls); |
248f219c | 261 | write_unlock(&rxrpc_call_lock); |
17926a79 | 262 | |
248f219c DH |
263 | /* Set up or get a connection record and set the protocol parameters, |
264 | * including channel number and call ID. | |
265 | */ | |
266 | ret = rxrpc_connect_call(call, cp, srx, gfp); | |
999b69f8 DH |
267 | if (ret < 0) |
268 | goto error; | |
269 | ||
a84a46d7 DH |
270 | trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage), |
271 | here, ERR_PTR(ret)); | |
272 | ||
248f219c DH |
273 | spin_lock_bh(&call->conn->params.peer->lock); |
274 | hlist_add_head(&call->error_link, | |
275 | &call->conn->params.peer->error_targets); | |
276 | spin_unlock_bh(&call->conn->params.peer->lock); | |
277 | ||
278 | rxrpc_start_call_timer(call); | |
279 | ||
17926a79 DH |
280 | _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); |
281 | ||
282 | _leave(" = %p [new]", call); | |
283 | return call; | |
284 | ||
2341e077 DH |
285 | /* We unexpectedly found the user ID in the list after taking |
286 | * the call_lock. This shouldn't happen unless the user races | |
287 | * with itself and tries to add the same user ID twice at the | |
288 | * same time in different threads. | |
289 | */ | |
357f5ef6 | 290 | error_dup_user_ID: |
17926a79 | 291 | write_unlock(&rx->call_lock); |
8d94aa38 | 292 | ret = -EEXIST; |
357f5ef6 DH |
293 | |
294 | error: | |
295 | __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, | |
296 | RX_CALL_DEAD, ret); | |
a84a46d7 DH |
297 | trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage), |
298 | here, ERR_PTR(ret)); | |
357f5ef6 DH |
299 | rxrpc_release_call(rx, call); |
300 | rxrpc_put_call(call, rxrpc_call_put); | |
301 | _leave(" = %d", ret); | |
302 | return ERR_PTR(ret); | |
17926a79 DH |
303 | } |
304 | ||
305 | /* | |
248f219c DH |
306 | * Set up an incoming call. call->conn points to the connection. |
307 | * This is called in BH context and isn't allowed to fail. | |
17926a79 | 308 | */ |
248f219c DH |
309 | void rxrpc_incoming_call(struct rxrpc_sock *rx, |
310 | struct rxrpc_call *call, | |
311 | struct sk_buff *skb) | |
17926a79 | 312 | { |
248f219c | 313 | struct rxrpc_connection *conn = call->conn; |
42886ffe | 314 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
248f219c | 315 | u32 chan; |
17926a79 | 316 | |
248f219c | 317 | _enter(",%d", call->conn->debug_id); |
e34d4234 | 318 | |
248f219c DH |
319 | rcu_assign_pointer(call->socket, rx); |
320 | call->call_id = sp->hdr.callNumber; | |
321 | call->service_id = sp->hdr.serviceId; | |
322 | call->cid = sp->hdr.cid; | |
323 | call->state = RXRPC_CALL_SERVER_ACCEPTING; | |
324 | if (sp->hdr.securityIndex > 0) | |
325 | call->state = RXRPC_CALL_SERVER_SECURING; | |
326 | ||
327 | /* Set the channel for this call. We don't get channel_lock as we're | |
328 | * only defending against the data_ready handler (which we're called | |
329 | * from) and the RESPONSE packet parser (which is only really | |
330 | * interested in call_counter and can cope with a disagreement with the | |
331 | * call pointer). | |
a1399f8b | 332 | */ |
248f219c DH |
333 | chan = sp->hdr.cid & RXRPC_CHANNELMASK; |
334 | conn->channels[chan].call_counter = call->call_id; | |
335 | conn->channels[chan].call_id = call->call_id; | |
a1399f8b | 336 | rcu_assign_pointer(conn->channels[chan].call, call); |
17926a79 | 337 | |
85f32278 DH |
338 | spin_lock(&conn->params.peer->lock); |
339 | hlist_add_head(&call->error_link, &conn->params.peer->error_targets); | |
340 | spin_unlock(&conn->params.peer->lock); | |
17926a79 | 341 | |
17926a79 DH |
342 | _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); |
343 | ||
248f219c DH |
344 | rxrpc_start_call_timer(call); |
345 | _leave(""); | |
17926a79 DH |
346 | } |
347 | ||
8d94aa38 DH |
348 | /* |
349 | * Queue a call's work processor, getting a ref to pass to the work queue. | |
350 | */ | |
351 | bool rxrpc_queue_call(struct rxrpc_call *call) | |
352 | { | |
353 | const void *here = __builtin_return_address(0); | |
354 | int n = __atomic_add_unless(&call->usage, 1, 0); | |
8d94aa38 DH |
355 | if (n == 0) |
356 | return false; | |
357 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 358 | trace_rxrpc_call(call, rxrpc_call_queued, n + 1, here, NULL); |
8d94aa38 DH |
359 | else |
360 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
361 | return true; | |
362 | } | |
363 | ||
364 | /* | |
365 | * Queue a call's work processor, passing the callers ref to the work queue. | |
366 | */ | |
367 | bool __rxrpc_queue_call(struct rxrpc_call *call) | |
368 | { | |
369 | const void *here = __builtin_return_address(0); | |
370 | int n = atomic_read(&call->usage); | |
8d94aa38 DH |
371 | ASSERTCMP(n, >=, 1); |
372 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 373 | trace_rxrpc_call(call, rxrpc_call_queued_ref, n, here, NULL); |
8d94aa38 DH |
374 | else |
375 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
376 | return true; | |
377 | } | |
378 | ||
e34d4234 DH |
379 | /* |
380 | * Note the re-emergence of a call. | |
381 | */ | |
382 | void rxrpc_see_call(struct rxrpc_call *call) | |
383 | { | |
384 | const void *here = __builtin_return_address(0); | |
385 | if (call) { | |
386 | int n = atomic_read(&call->usage); | |
e34d4234 | 387 | |
2ab27215 | 388 | trace_rxrpc_call(call, rxrpc_call_seen, n, here, NULL); |
e34d4234 DH |
389 | } |
390 | } | |
391 | ||
392 | /* | |
393 | * Note the addition of a ref on a call. | |
394 | */ | |
fff72429 | 395 | void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
e34d4234 DH |
396 | { |
397 | const void *here = __builtin_return_address(0); | |
398 | int n = atomic_inc_return(&call->usage); | |
e34d4234 | 399 | |
2ab27215 | 400 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
401 | } |
402 | ||
403 | /* | |
248f219c | 404 | * Detach a call from its owning socket. |
e34d4234 | 405 | */ |
248f219c | 406 | void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) |
e34d4234 | 407 | { |
a84a46d7 | 408 | const void *here = __builtin_return_address(0); |
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 | |
a84a46d7 DH |
415 | trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage), |
416 | here, (const void *)call->flags); | |
17926a79 | 417 | |
a84a46d7 | 418 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
e34d4234 | 419 | |
17926a79 DH |
420 | spin_lock_bh(&call->lock); |
421 | if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) | |
422 | BUG(); | |
423 | spin_unlock_bh(&call->lock); | |
424 | ||
248f219c | 425 | del_timer_sync(&call->timer); |
17926a79 | 426 | |
248f219c DH |
427 | /* Make sure we don't get any more notifications */ |
428 | write_lock_bh(&rx->recvmsg_lock); | |
e653cfe4 | 429 | |
248f219c | 430 | if (!list_empty(&call->recvmsg_link)) { |
17926a79 DH |
431 | _debug("unlinking once-pending call %p { e=%lx f=%lx }", |
432 | call, call->events, call->flags); | |
248f219c DH |
433 | list_del(&call->recvmsg_link); |
434 | put = true; | |
435 | } | |
436 | ||
437 | /* list_empty() must return false in rxrpc_notify_socket() */ | |
438 | call->recvmsg_link.next = NULL; | |
439 | call->recvmsg_link.prev = NULL; | |
440 | ||
441 | write_unlock_bh(&rx->recvmsg_lock); | |
442 | if (put) | |
443 | rxrpc_put_call(call, rxrpc_call_put); | |
444 | ||
445 | write_lock(&rx->call_lock); | |
446 | ||
447 | if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { | |
17926a79 DH |
448 | rb_erase(&call->sock_node, &rx->calls); |
449 | memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); | |
8d94aa38 | 450 | rxrpc_put_call(call, rxrpc_call_put_userid); |
17926a79 | 451 | } |
17926a79 | 452 | |
248f219c DH |
453 | list_del(&call->sock_link); |
454 | write_unlock(&rx->call_lock); | |
455 | ||
456 | _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); | |
457 | ||
458 | if (conn) | |
8d94aa38 | 459 | rxrpc_disconnect_call(call); |
e653cfe4 | 460 | |
248f219c | 461 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) { |
71f3ca40 DH |
462 | rxrpc_free_skb(call->rxtx_buffer[i], |
463 | (call->tx_phase ? rxrpc_skb_tx_cleaned : | |
464 | rxrpc_skb_rx_cleaned)); | |
248f219c | 465 | call->rxtx_buffer[i] = NULL; |
17926a79 | 466 | } |
17926a79 DH |
467 | |
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 | ||
0360da6d DH |
480 | while (!list_empty(&rx->to_be_accepted)) { |
481 | call = list_entry(rx->to_be_accepted.next, | |
482 | struct rxrpc_call, accept_link); | |
483 | list_del(&call->accept_link); | |
484 | rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, ECONNRESET); | |
0360da6d DH |
485 | rxrpc_put_call(call, rxrpc_call_put); |
486 | } | |
487 | ||
248f219c DH |
488 | while (!list_empty(&rx->sock_calls)) { |
489 | call = list_entry(rx->sock_calls.next, | |
490 | struct rxrpc_call, sock_link); | |
491 | rxrpc_get_call(call, rxrpc_call_got); | |
492 | rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, ECONNRESET); | |
493 | rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT); | |
8d94aa38 | 494 | rxrpc_release_call(rx, call); |
248f219c | 495 | rxrpc_put_call(call, rxrpc_call_put); |
f36b5e44 DH |
496 | } |
497 | ||
17926a79 DH |
498 | _leave(""); |
499 | } | |
500 | ||
501 | /* | |
502 | * release a call | |
503 | */ | |
fff72429 | 504 | void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
17926a79 | 505 | { |
e34d4234 | 506 | const void *here = __builtin_return_address(0); |
2ab27215 | 507 | int n; |
17926a79 | 508 | |
e34d4234 | 509 | ASSERT(call != NULL); |
17926a79 | 510 | |
e34d4234 | 511 | n = atomic_dec_return(&call->usage); |
2ab27215 | 512 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
513 | ASSERTCMP(n, >=, 0); |
514 | if (n == 0) { | |
515 | _debug("call %d dead", call->debug_id); | |
248f219c | 516 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 517 | |
248f219c DH |
518 | write_lock(&rxrpc_call_lock); |
519 | list_del_init(&call->link); | |
520 | write_unlock(&rxrpc_call_lock); | |
e34d4234 | 521 | |
8d94aa38 | 522 | rxrpc_cleanup_call(call); |
17926a79 | 523 | } |
17926a79 DH |
524 | } |
525 | ||
dee46364 DH |
526 | /* |
527 | * Final call destruction under RCU. | |
528 | */ | |
529 | static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) | |
530 | { | |
531 | struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); | |
532 | ||
df5d8bf7 | 533 | rxrpc_put_peer(call->peer); |
248f219c DH |
534 | kfree(call->rxtx_buffer); |
535 | kfree(call->rxtx_annotations); | |
dee46364 DH |
536 | kmem_cache_free(rxrpc_call_jar, call); |
537 | } | |
538 | ||
17926a79 DH |
539 | /* |
540 | * clean up a call | |
541 | */ | |
00e90712 | 542 | void rxrpc_cleanup_call(struct rxrpc_call *call) |
17926a79 | 543 | { |
248f219c | 544 | int i; |
17926a79 | 545 | |
248f219c | 546 | _net("DESTROY CALL %d", call->debug_id); |
17926a79 DH |
547 | |
548 | memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); | |
549 | ||
248f219c | 550 | del_timer_sync(&call->timer); |
17926a79 | 551 | |
8d94aa38 | 552 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 553 | ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); |
e653cfe4 | 554 | ASSERTCMP(call->conn, ==, NULL); |
17926a79 | 555 | |
248f219c DH |
556 | /* Clean up the Rx/Tx buffer */ |
557 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) | |
71f3ca40 DH |
558 | rxrpc_free_skb(call->rxtx_buffer[i], |
559 | (call->tx_phase ? rxrpc_skb_tx_cleaned : | |
560 | rxrpc_skb_rx_cleaned)); | |
17926a79 | 561 | |
71f3ca40 | 562 | rxrpc_free_skb(call->tx_pending, rxrpc_skb_tx_cleaned); |
17926a79 | 563 | |
dee46364 | 564 | call_rcu(&call->rcu, rxrpc_rcu_destroy_call); |
17926a79 DH |
565 | } |
566 | ||
567 | /* | |
8d94aa38 | 568 | * Make sure that all calls are gone. |
17926a79 DH |
569 | */ |
570 | void __exit rxrpc_destroy_all_calls(void) | |
571 | { | |
572 | struct rxrpc_call *call; | |
573 | ||
574 | _enter(""); | |
8d94aa38 DH |
575 | |
576 | if (list_empty(&rxrpc_calls)) | |
577 | return; | |
248f219c DH |
578 | |
579 | write_lock(&rxrpc_call_lock); | |
17926a79 DH |
580 | |
581 | while (!list_empty(&rxrpc_calls)) { | |
582 | call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); | |
583 | _debug("Zapping call %p", call); | |
584 | ||
e34d4234 | 585 | rxrpc_see_call(call); |
17926a79 DH |
586 | list_del_init(&call->link); |
587 | ||
248f219c | 588 | pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", |
8d94aa38 | 589 | call, atomic_read(&call->usage), |
8d94aa38 DH |
590 | rxrpc_call_states[call->state], |
591 | call->flags, call->events); | |
17926a79 | 592 | |
248f219c | 593 | write_unlock(&rxrpc_call_lock); |
17926a79 | 594 | cond_resched(); |
248f219c | 595 | write_lock(&rxrpc_call_lock); |
17926a79 DH |
596 | } |
597 | ||
248f219c | 598 | write_unlock(&rxrpc_call_lock); |
17926a79 | 599 | } |