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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 | ||
5b8848d1 | 22 | const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = { |
f5c17aae | 23 | [RXRPC_CALL_UNINITIALISED] = "Uninit ", |
999b69f8 | 24 | [RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn", |
1f8481d1 DH |
25 | [RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq", |
26 | [RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl", | |
27 | [RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl", | |
00e90712 | 28 | [RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc", |
1f8481d1 DH |
29 | [RXRPC_CALL_SERVER_SECURING] = "SvSecure", |
30 | [RXRPC_CALL_SERVER_ACCEPTING] = "SvAccept", | |
31 | [RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq", | |
32 | [RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq", | |
33 | [RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl", | |
34 | [RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK", | |
35 | [RXRPC_CALL_COMPLETE] = "Complete", | |
f5c17aae DH |
36 | }; |
37 | ||
38 | const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = { | |
39 | [RXRPC_CALL_SUCCEEDED] = "Complete", | |
1f8481d1 DH |
40 | [RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort", |
41 | [RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort", | |
f5c17aae | 42 | [RXRPC_CALL_LOCAL_ERROR] = "LocError", |
1f8481d1 | 43 | [RXRPC_CALL_NETWORK_ERROR] = "NetError", |
1f8481d1 DH |
44 | }; |
45 | ||
17926a79 DH |
46 | struct kmem_cache *rxrpc_call_jar; |
47 | LIST_HEAD(rxrpc_calls); | |
48 | DEFINE_RWLOCK(rxrpc_call_lock); | |
17926a79 | 49 | |
248f219c DH |
50 | static void rxrpc_call_timer_expired(unsigned long _call) |
51 | { | |
52 | struct rxrpc_call *call = (struct rxrpc_call *)_call; | |
53 | ||
54 | _enter("%d", call->debug_id); | |
55 | ||
405dea1d DH |
56 | if (call->state < RXRPC_CALL_COMPLETE) |
57 | rxrpc_set_timer(call, rxrpc_timer_expired, ktime_get_real()); | |
248f219c | 58 | } |
17926a79 | 59 | |
2341e077 DH |
60 | /* |
61 | * find an extant server call | |
62 | * - called in process context with IRQs enabled | |
63 | */ | |
64 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx, | |
65 | unsigned long user_call_ID) | |
66 | { | |
67 | struct rxrpc_call *call; | |
68 | struct rb_node *p; | |
69 | ||
70 | _enter("%p,%lx", rx, user_call_ID); | |
71 | ||
72 | read_lock(&rx->call_lock); | |
73 | ||
74 | p = rx->calls.rb_node; | |
75 | while (p) { | |
76 | call = rb_entry(p, struct rxrpc_call, sock_node); | |
77 | ||
78 | if (user_call_ID < call->user_call_ID) | |
79 | p = p->rb_left; | |
80 | else if (user_call_ID > call->user_call_ID) | |
81 | p = p->rb_right; | |
82 | else | |
83 | goto found_extant_call; | |
84 | } | |
85 | ||
86 | read_unlock(&rx->call_lock); | |
87 | _leave(" = NULL"); | |
88 | return NULL; | |
89 | ||
90 | found_extant_call: | |
fff72429 | 91 | rxrpc_get_call(call, rxrpc_call_got); |
2341e077 DH |
92 | read_unlock(&rx->call_lock); |
93 | _leave(" = %p [%d]", call, atomic_read(&call->usage)); | |
94 | return call; | |
95 | } | |
96 | ||
17926a79 DH |
97 | /* |
98 | * allocate a new call | |
99 | */ | |
00e90712 | 100 | struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp) |
17926a79 DH |
101 | { |
102 | struct rxrpc_call *call; | |
103 | ||
104 | call = kmem_cache_zalloc(rxrpc_call_jar, gfp); | |
105 | if (!call) | |
106 | return NULL; | |
107 | ||
248f219c DH |
108 | call->rxtx_buffer = kcalloc(RXRPC_RXTX_BUFF_SIZE, |
109 | sizeof(struct sk_buff *), | |
17926a79 | 110 | gfp); |
248f219c DH |
111 | if (!call->rxtx_buffer) |
112 | goto nomem; | |
17926a79 | 113 | |
248f219c DH |
114 | call->rxtx_annotations = kcalloc(RXRPC_RXTX_BUFF_SIZE, sizeof(u8), gfp); |
115 | if (!call->rxtx_annotations) | |
116 | goto nomem_2; | |
117 | ||
540b1c48 | 118 | mutex_init(&call->user_mutex); |
248f219c DH |
119 | setup_timer(&call->timer, rxrpc_call_timer_expired, |
120 | (unsigned long)call); | |
17926a79 | 121 | INIT_WORK(&call->processor, &rxrpc_process_call); |
999b69f8 | 122 | INIT_LIST_HEAD(&call->link); |
45025bce | 123 | INIT_LIST_HEAD(&call->chan_wait_link); |
17926a79 | 124 | INIT_LIST_HEAD(&call->accept_link); |
248f219c DH |
125 | INIT_LIST_HEAD(&call->recvmsg_link); |
126 | INIT_LIST_HEAD(&call->sock_link); | |
45025bce | 127 | init_waitqueue_head(&call->waitq); |
17926a79 DH |
128 | spin_lock_init(&call->lock); |
129 | rwlock_init(&call->state_lock); | |
130 | atomic_set(&call->usage, 1); | |
131 | call->debug_id = atomic_inc_return(&rxrpc_debug_id); | |
17926a79 DH |
132 | |
133 | memset(&call->sock_node, 0xed, sizeof(call->sock_node)); | |
134 | ||
248f219c | 135 | /* Leave space in the ring to handle a maxed-out jumbo packet */ |
75e42126 | 136 | call->rx_winsize = rxrpc_rx_window_size; |
248f219c DH |
137 | call->tx_winsize = 16; |
138 | call->rx_expect_next = 1; | |
57494343 DH |
139 | |
140 | if (RXRPC_TX_SMSS > 2190) | |
141 | call->cong_cwnd = 2; | |
142 | else if (RXRPC_TX_SMSS > 1095) | |
143 | call->cong_cwnd = 3; | |
144 | else | |
145 | call->cong_cwnd = 4; | |
146 | call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1; | |
17926a79 | 147 | return call; |
248f219c DH |
148 | |
149 | nomem_2: | |
150 | kfree(call->rxtx_buffer); | |
151 | nomem: | |
152 | kmem_cache_free(rxrpc_call_jar, call); | |
153 | return NULL; | |
17926a79 DH |
154 | } |
155 | ||
156 | /* | |
999b69f8 | 157 | * Allocate a new client call. |
17926a79 | 158 | */ |
248f219c | 159 | static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx, |
aa390bbe | 160 | gfp_t gfp) |
17926a79 DH |
161 | { |
162 | struct rxrpc_call *call; | |
57494343 | 163 | ktime_t now; |
17926a79 DH |
164 | |
165 | _enter(""); | |
166 | ||
17926a79 DH |
167 | call = rxrpc_alloc_call(gfp); |
168 | if (!call) | |
169 | return ERR_PTR(-ENOMEM); | |
999b69f8 | 170 | call->state = RXRPC_CALL_CLIENT_AWAIT_CONN; |
999b69f8 | 171 | call->service_id = srx->srx_service; |
71f3ca40 | 172 | call->tx_phase = true; |
57494343 DH |
173 | now = ktime_get_real(); |
174 | call->acks_latest_ts = now; | |
175 | call->cong_tstamp = now; | |
999b69f8 DH |
176 | |
177 | _leave(" = %p", call); | |
178 | return call; | |
179 | } | |
180 | ||
181 | /* | |
248f219c | 182 | * Initiate the call ack/resend/expiry timer. |
999b69f8 | 183 | */ |
248f219c | 184 | static void rxrpc_start_call_timer(struct rxrpc_call *call) |
999b69f8 | 185 | { |
df0adc78 | 186 | ktime_t now = ktime_get_real(), expire_at; |
248f219c | 187 | |
df0adc78 | 188 | expire_at = ktime_add_ms(now, rxrpc_max_call_lifetime); |
248f219c DH |
189 | call->expire_at = expire_at; |
190 | call->ack_at = expire_at; | |
a5af7e1f | 191 | call->ping_at = expire_at; |
248f219c | 192 | call->resend_at = expire_at; |
df0adc78 DH |
193 | call->timer.expires = jiffies + LONG_MAX / 2; |
194 | rxrpc_set_timer(call, rxrpc_timer_begin, now); | |
17926a79 DH |
195 | } |
196 | ||
197 | /* | |
540b1c48 DH |
198 | * Set up a call for the given parameters. |
199 | * - Called with the socket lock held, which it must release. | |
200 | * - If it returns a call, the call's lock will need releasing by the caller. | |
17926a79 | 201 | */ |
2341e077 | 202 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx, |
19ffa01c | 203 | struct rxrpc_conn_parameters *cp, |
999b69f8 | 204 | struct sockaddr_rxrpc *srx, |
17926a79 | 205 | unsigned long user_call_ID, |
17926a79 | 206 | gfp_t gfp) |
540b1c48 | 207 | __releases(&rx->sk.sk_lock.slock) |
17926a79 | 208 | { |
2341e077 DH |
209 | struct rxrpc_call *call, *xcall; |
210 | struct rb_node *parent, **pp; | |
e34d4234 | 211 | const void *here = __builtin_return_address(0); |
999b69f8 | 212 | int ret; |
17926a79 | 213 | |
999b69f8 | 214 | _enter("%p,%lx", rx, user_call_ID); |
17926a79 | 215 | |
248f219c | 216 | call = rxrpc_alloc_client_call(srx, gfp); |
2341e077 | 217 | if (IS_ERR(call)) { |
540b1c48 | 218 | release_sock(&rx->sk); |
2341e077 DH |
219 | _leave(" = %ld", PTR_ERR(call)); |
220 | return call; | |
17926a79 DH |
221 | } |
222 | ||
a84a46d7 DH |
223 | trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage), |
224 | here, (const void *)user_call_ID); | |
e34d4234 | 225 | |
540b1c48 DH |
226 | /* We need to protect a partially set up call against the user as we |
227 | * will be acting outside the socket lock. | |
228 | */ | |
229 | mutex_lock(&call->user_mutex); | |
230 | ||
999b69f8 | 231 | /* Publish the call, even though it is incompletely set up as yet */ |
17926a79 DH |
232 | write_lock(&rx->call_lock); |
233 | ||
234 | pp = &rx->calls.rb_node; | |
235 | parent = NULL; | |
236 | while (*pp) { | |
237 | parent = *pp; | |
2341e077 | 238 | xcall = rb_entry(parent, struct rxrpc_call, sock_node); |
17926a79 | 239 | |
2341e077 | 240 | if (user_call_ID < xcall->user_call_ID) |
17926a79 | 241 | pp = &(*pp)->rb_left; |
2341e077 | 242 | else if (user_call_ID > xcall->user_call_ID) |
17926a79 DH |
243 | pp = &(*pp)->rb_right; |
244 | else | |
357f5ef6 | 245 | goto error_dup_user_ID; |
17926a79 DH |
246 | } |
247 | ||
248f219c | 248 | rcu_assign_pointer(call->socket, rx); |
357f5ef6 DH |
249 | call->user_call_ID = user_call_ID; |
250 | __set_bit(RXRPC_CALL_HAS_USERID, &call->flags); | |
fff72429 | 251 | rxrpc_get_call(call, rxrpc_call_got_userid); |
17926a79 DH |
252 | rb_link_node(&call->sock_node, parent, pp); |
253 | rb_insert_color(&call->sock_node, &rx->calls); | |
248f219c DH |
254 | list_add(&call->sock_link, &rx->sock_calls); |
255 | ||
17926a79 DH |
256 | write_unlock(&rx->call_lock); |
257 | ||
248f219c | 258 | write_lock(&rxrpc_call_lock); |
17926a79 | 259 | list_add_tail(&call->link, &rxrpc_calls); |
248f219c | 260 | write_unlock(&rxrpc_call_lock); |
17926a79 | 261 | |
540b1c48 DH |
262 | /* From this point on, the call is protected by its own lock. */ |
263 | release_sock(&rx->sk); | |
264 | ||
248f219c DH |
265 | /* Set up or get a connection record and set the protocol parameters, |
266 | * including channel number and call ID. | |
267 | */ | |
268 | ret = rxrpc_connect_call(call, cp, srx, gfp); | |
999b69f8 DH |
269 | if (ret < 0) |
270 | goto error; | |
271 | ||
a84a46d7 | 272 | trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage), |
54fde423 | 273 | here, NULL); |
a84a46d7 | 274 | |
248f219c DH |
275 | spin_lock_bh(&call->conn->params.peer->lock); |
276 | hlist_add_head(&call->error_link, | |
277 | &call->conn->params.peer->error_targets); | |
278 | spin_unlock_bh(&call->conn->params.peer->lock); | |
279 | ||
280 | rxrpc_start_call_timer(call); | |
281 | ||
17926a79 DH |
282 | _net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id); |
283 | ||
284 | _leave(" = %p [new]", call); | |
285 | return call; | |
286 | ||
2341e077 DH |
287 | /* We unexpectedly found the user ID in the list after taking |
288 | * the call_lock. This shouldn't happen unless the user races | |
289 | * with itself and tries to add the same user ID twice at the | |
290 | * same time in different threads. | |
291 | */ | |
357f5ef6 | 292 | error_dup_user_ID: |
17926a79 | 293 | write_unlock(&rx->call_lock); |
540b1c48 | 294 | release_sock(&rx->sk); |
8d94aa38 | 295 | ret = -EEXIST; |
357f5ef6 DH |
296 | |
297 | error: | |
298 | __rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, | |
299 | RX_CALL_DEAD, ret); | |
a84a46d7 DH |
300 | trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage), |
301 | here, ERR_PTR(ret)); | |
357f5ef6 | 302 | rxrpc_release_call(rx, call); |
540b1c48 | 303 | mutex_unlock(&call->user_mutex); |
357f5ef6 DH |
304 | rxrpc_put_call(call, rxrpc_call_put); |
305 | _leave(" = %d", ret); | |
306 | return ERR_PTR(ret); | |
17926a79 DH |
307 | } |
308 | ||
309 | /* | |
248f219c DH |
310 | * Set up an incoming call. call->conn points to the connection. |
311 | * This is called in BH context and isn't allowed to fail. | |
17926a79 | 312 | */ |
248f219c DH |
313 | void rxrpc_incoming_call(struct rxrpc_sock *rx, |
314 | struct rxrpc_call *call, | |
315 | struct sk_buff *skb) | |
17926a79 | 316 | { |
248f219c | 317 | struct rxrpc_connection *conn = call->conn; |
42886ffe | 318 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
248f219c | 319 | u32 chan; |
17926a79 | 320 | |
248f219c | 321 | _enter(",%d", call->conn->debug_id); |
e34d4234 | 322 | |
248f219c DH |
323 | rcu_assign_pointer(call->socket, rx); |
324 | call->call_id = sp->hdr.callNumber; | |
325 | call->service_id = sp->hdr.serviceId; | |
326 | call->cid = sp->hdr.cid; | |
327 | call->state = RXRPC_CALL_SERVER_ACCEPTING; | |
328 | if (sp->hdr.securityIndex > 0) | |
329 | call->state = RXRPC_CALL_SERVER_SECURING; | |
57494343 | 330 | call->cong_tstamp = skb->tstamp; |
248f219c DH |
331 | |
332 | /* Set the channel for this call. We don't get channel_lock as we're | |
333 | * only defending against the data_ready handler (which we're called | |
334 | * from) and the RESPONSE packet parser (which is only really | |
335 | * interested in call_counter and can cope with a disagreement with the | |
336 | * call pointer). | |
a1399f8b | 337 | */ |
248f219c DH |
338 | chan = sp->hdr.cid & RXRPC_CHANNELMASK; |
339 | conn->channels[chan].call_counter = call->call_id; | |
340 | conn->channels[chan].call_id = call->call_id; | |
a1399f8b | 341 | rcu_assign_pointer(conn->channels[chan].call, call); |
17926a79 | 342 | |
85f32278 DH |
343 | spin_lock(&conn->params.peer->lock); |
344 | hlist_add_head(&call->error_link, &conn->params.peer->error_targets); | |
345 | spin_unlock(&conn->params.peer->lock); | |
17926a79 | 346 | |
17926a79 DH |
347 | _net("CALL incoming %d on CONN %d", call->debug_id, call->conn->debug_id); |
348 | ||
248f219c DH |
349 | rxrpc_start_call_timer(call); |
350 | _leave(""); | |
17926a79 DH |
351 | } |
352 | ||
8d94aa38 DH |
353 | /* |
354 | * Queue a call's work processor, getting a ref to pass to the work queue. | |
355 | */ | |
356 | bool rxrpc_queue_call(struct rxrpc_call *call) | |
357 | { | |
358 | const void *here = __builtin_return_address(0); | |
359 | int n = __atomic_add_unless(&call->usage, 1, 0); | |
8d94aa38 DH |
360 | if (n == 0) |
361 | return false; | |
362 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 363 | trace_rxrpc_call(call, rxrpc_call_queued, n + 1, here, NULL); |
8d94aa38 DH |
364 | else |
365 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
366 | return true; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Queue a call's work processor, passing the callers ref to the work queue. | |
371 | */ | |
372 | bool __rxrpc_queue_call(struct rxrpc_call *call) | |
373 | { | |
374 | const void *here = __builtin_return_address(0); | |
375 | int n = atomic_read(&call->usage); | |
8d94aa38 DH |
376 | ASSERTCMP(n, >=, 1); |
377 | if (rxrpc_queue_work(&call->processor)) | |
2ab27215 | 378 | trace_rxrpc_call(call, rxrpc_call_queued_ref, n, here, NULL); |
8d94aa38 DH |
379 | else |
380 | rxrpc_put_call(call, rxrpc_call_put_noqueue); | |
381 | return true; | |
382 | } | |
383 | ||
e34d4234 DH |
384 | /* |
385 | * Note the re-emergence of a call. | |
386 | */ | |
387 | void rxrpc_see_call(struct rxrpc_call *call) | |
388 | { | |
389 | const void *here = __builtin_return_address(0); | |
390 | if (call) { | |
391 | int n = atomic_read(&call->usage); | |
e34d4234 | 392 | |
2ab27215 | 393 | trace_rxrpc_call(call, rxrpc_call_seen, n, here, NULL); |
e34d4234 DH |
394 | } |
395 | } | |
396 | ||
397 | /* | |
398 | * Note the addition of a ref on a call. | |
399 | */ | |
fff72429 | 400 | void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
e34d4234 DH |
401 | { |
402 | const void *here = __builtin_return_address(0); | |
403 | int n = atomic_inc_return(&call->usage); | |
e34d4234 | 404 | |
2ab27215 | 405 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
406 | } |
407 | ||
408 | /* | |
248f219c | 409 | * Detach a call from its owning socket. |
e34d4234 | 410 | */ |
248f219c | 411 | void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) |
e34d4234 | 412 | { |
a84a46d7 | 413 | const void *here = __builtin_return_address(0); |
248f219c DH |
414 | struct rxrpc_connection *conn = call->conn; |
415 | bool put = false; | |
416 | int i; | |
e34d4234 | 417 | |
248f219c | 418 | _enter("{%d,%d}", call->debug_id, atomic_read(&call->usage)); |
e34d4234 | 419 | |
a84a46d7 DH |
420 | trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage), |
421 | here, (const void *)call->flags); | |
17926a79 | 422 | |
a84a46d7 | 423 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
e34d4234 | 424 | |
17926a79 DH |
425 | spin_lock_bh(&call->lock); |
426 | if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags)) | |
427 | BUG(); | |
428 | spin_unlock_bh(&call->lock); | |
429 | ||
248f219c | 430 | del_timer_sync(&call->timer); |
17926a79 | 431 | |
248f219c DH |
432 | /* Make sure we don't get any more notifications */ |
433 | write_lock_bh(&rx->recvmsg_lock); | |
e653cfe4 | 434 | |
248f219c | 435 | if (!list_empty(&call->recvmsg_link)) { |
17926a79 DH |
436 | _debug("unlinking once-pending call %p { e=%lx f=%lx }", |
437 | call, call->events, call->flags); | |
248f219c DH |
438 | list_del(&call->recvmsg_link); |
439 | put = true; | |
440 | } | |
441 | ||
442 | /* list_empty() must return false in rxrpc_notify_socket() */ | |
443 | call->recvmsg_link.next = NULL; | |
444 | call->recvmsg_link.prev = NULL; | |
445 | ||
446 | write_unlock_bh(&rx->recvmsg_lock); | |
447 | if (put) | |
448 | rxrpc_put_call(call, rxrpc_call_put); | |
449 | ||
450 | write_lock(&rx->call_lock); | |
451 | ||
452 | if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) { | |
17926a79 DH |
453 | rb_erase(&call->sock_node, &rx->calls); |
454 | memset(&call->sock_node, 0xdd, sizeof(call->sock_node)); | |
8d94aa38 | 455 | rxrpc_put_call(call, rxrpc_call_put_userid); |
17926a79 | 456 | } |
17926a79 | 457 | |
248f219c DH |
458 | list_del(&call->sock_link); |
459 | write_unlock(&rx->call_lock); | |
460 | ||
461 | _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); | |
462 | ||
463 | if (conn) | |
8d94aa38 | 464 | rxrpc_disconnect_call(call); |
e653cfe4 | 465 | |
248f219c | 466 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) { |
71f3ca40 DH |
467 | rxrpc_free_skb(call->rxtx_buffer[i], |
468 | (call->tx_phase ? rxrpc_skb_tx_cleaned : | |
469 | rxrpc_skb_rx_cleaned)); | |
248f219c | 470 | call->rxtx_buffer[i] = NULL; |
17926a79 | 471 | } |
17926a79 DH |
472 | |
473 | _leave(""); | |
474 | } | |
475 | ||
17926a79 DH |
476 | /* |
477 | * release all the calls associated with a socket | |
478 | */ | |
479 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx) | |
480 | { | |
481 | struct rxrpc_call *call; | |
17926a79 DH |
482 | |
483 | _enter("%p", rx); | |
484 | ||
0360da6d DH |
485 | while (!list_empty(&rx->to_be_accepted)) { |
486 | call = list_entry(rx->to_be_accepted.next, | |
487 | struct rxrpc_call, accept_link); | |
488 | list_del(&call->accept_link); | |
489 | rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, ECONNRESET); | |
0360da6d DH |
490 | rxrpc_put_call(call, rxrpc_call_put); |
491 | } | |
492 | ||
248f219c DH |
493 | while (!list_empty(&rx->sock_calls)) { |
494 | call = list_entry(rx->sock_calls.next, | |
495 | struct rxrpc_call, sock_link); | |
496 | rxrpc_get_call(call, rxrpc_call_got); | |
497 | rxrpc_abort_call("SKT", call, 0, RX_CALL_DEAD, ECONNRESET); | |
26cb02aa | 498 | rxrpc_send_abort_packet(call); |
8d94aa38 | 499 | rxrpc_release_call(rx, call); |
248f219c | 500 | rxrpc_put_call(call, rxrpc_call_put); |
f36b5e44 DH |
501 | } |
502 | ||
17926a79 DH |
503 | _leave(""); |
504 | } | |
505 | ||
506 | /* | |
507 | * release a call | |
508 | */ | |
fff72429 | 509 | void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op) |
17926a79 | 510 | { |
e34d4234 | 511 | const void *here = __builtin_return_address(0); |
2ab27215 | 512 | int n; |
17926a79 | 513 | |
e34d4234 | 514 | ASSERT(call != NULL); |
17926a79 | 515 | |
e34d4234 | 516 | n = atomic_dec_return(&call->usage); |
2ab27215 | 517 | trace_rxrpc_call(call, op, n, here, NULL); |
e34d4234 DH |
518 | ASSERTCMP(n, >=, 0); |
519 | if (n == 0) { | |
520 | _debug("call %d dead", call->debug_id); | |
248f219c | 521 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 522 | |
248f219c DH |
523 | write_lock(&rxrpc_call_lock); |
524 | list_del_init(&call->link); | |
525 | write_unlock(&rxrpc_call_lock); | |
e34d4234 | 526 | |
8d94aa38 | 527 | rxrpc_cleanup_call(call); |
17926a79 | 528 | } |
17926a79 DH |
529 | } |
530 | ||
dee46364 DH |
531 | /* |
532 | * Final call destruction under RCU. | |
533 | */ | |
534 | static void rxrpc_rcu_destroy_call(struct rcu_head *rcu) | |
535 | { | |
536 | struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu); | |
537 | ||
df5d8bf7 | 538 | rxrpc_put_peer(call->peer); |
248f219c DH |
539 | kfree(call->rxtx_buffer); |
540 | kfree(call->rxtx_annotations); | |
dee46364 DH |
541 | kmem_cache_free(rxrpc_call_jar, call); |
542 | } | |
543 | ||
17926a79 DH |
544 | /* |
545 | * clean up a call | |
546 | */ | |
00e90712 | 547 | void rxrpc_cleanup_call(struct rxrpc_call *call) |
17926a79 | 548 | { |
248f219c | 549 | int i; |
17926a79 | 550 | |
248f219c | 551 | _net("DESTROY CALL %d", call->debug_id); |
17926a79 DH |
552 | |
553 | memset(&call->sock_node, 0xcd, sizeof(call->sock_node)); | |
554 | ||
248f219c | 555 | del_timer_sync(&call->timer); |
17926a79 | 556 | |
8d94aa38 | 557 | ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE); |
17926a79 | 558 | ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags)); |
e653cfe4 | 559 | ASSERTCMP(call->conn, ==, NULL); |
17926a79 | 560 | |
248f219c DH |
561 | /* Clean up the Rx/Tx buffer */ |
562 | for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) | |
71f3ca40 DH |
563 | rxrpc_free_skb(call->rxtx_buffer[i], |
564 | (call->tx_phase ? rxrpc_skb_tx_cleaned : | |
565 | rxrpc_skb_rx_cleaned)); | |
17926a79 | 566 | |
71f3ca40 | 567 | rxrpc_free_skb(call->tx_pending, rxrpc_skb_tx_cleaned); |
17926a79 | 568 | |
dee46364 | 569 | call_rcu(&call->rcu, rxrpc_rcu_destroy_call); |
17926a79 DH |
570 | } |
571 | ||
572 | /* | |
8d94aa38 | 573 | * Make sure that all calls are gone. |
17926a79 DH |
574 | */ |
575 | void __exit rxrpc_destroy_all_calls(void) | |
576 | { | |
577 | struct rxrpc_call *call; | |
578 | ||
579 | _enter(""); | |
8d94aa38 DH |
580 | |
581 | if (list_empty(&rxrpc_calls)) | |
582 | return; | |
248f219c DH |
583 | |
584 | write_lock(&rxrpc_call_lock); | |
17926a79 DH |
585 | |
586 | while (!list_empty(&rxrpc_calls)) { | |
587 | call = list_entry(rxrpc_calls.next, struct rxrpc_call, link); | |
588 | _debug("Zapping call %p", call); | |
589 | ||
e34d4234 | 590 | rxrpc_see_call(call); |
17926a79 DH |
591 | list_del_init(&call->link); |
592 | ||
248f219c | 593 | pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n", |
8d94aa38 | 594 | call, atomic_read(&call->usage), |
8d94aa38 DH |
595 | rxrpc_call_states[call->state], |
596 | call->flags, call->events); | |
17926a79 | 597 | |
248f219c | 598 | write_unlock(&rxrpc_call_lock); |
17926a79 | 599 | cond_resched(); |
248f219c | 600 | write_lock(&rxrpc_call_lock); |
17926a79 DH |
601 | } |
602 | ||
248f219c | 603 | write_unlock(&rxrpc_call_lock); |
17926a79 | 604 | } |