call_object.c (96b4059f43ce69e9c590f77d6ce3e99888d5cfe6) call_object.c (9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* RxRPC individual remote procedure call handling
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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145 */
146 if (rx->sk.sk_kern_sock)
147 lockdep_set_class(&call->user_mutex,
148 &rxrpc_call_user_mutex_lock_class_key);
149
150 timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
151 INIT_WORK(&call->destroyer, rxrpc_destroy_call);
152 INIT_LIST_HEAD(&call->link);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* RxRPC individual remote procedure call handling
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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145 */
146 if (rx->sk.sk_kern_sock)
147 lockdep_set_class(&call->user_mutex,
148 &rxrpc_call_user_mutex_lock_class_key);
149
150 timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
151 INIT_WORK(&call->destroyer, rxrpc_destroy_call);
152 INIT_LIST_HEAD(&call->link);
153 INIT_LIST_HEAD(&call->chan_wait_link);
153 INIT_LIST_HEAD(&call->wait_link);
154 INIT_LIST_HEAD(&call->accept_link);
155 INIT_LIST_HEAD(&call->recvmsg_link);
156 INIT_LIST_HEAD(&call->sock_link);
157 INIT_LIST_HEAD(&call->attend_link);
158 INIT_LIST_HEAD(&call->tx_sendmsg);
159 INIT_LIST_HEAD(&call->tx_buffer);
160 skb_queue_head_init(&call->recvmsg_queue);
161 skb_queue_head_init(&call->rx_oos_queue);

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237
238 _leave(" = %p", call);
239 return call;
240}
241
242/*
243 * Initiate the call ack/resend/expiry timer.
244 */
154 INIT_LIST_HEAD(&call->accept_link);
155 INIT_LIST_HEAD(&call->recvmsg_link);
156 INIT_LIST_HEAD(&call->sock_link);
157 INIT_LIST_HEAD(&call->attend_link);
158 INIT_LIST_HEAD(&call->tx_sendmsg);
159 INIT_LIST_HEAD(&call->tx_buffer);
160 skb_queue_head_init(&call->recvmsg_queue);
161 skb_queue_head_init(&call->rx_oos_queue);

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237
238 _leave(" = %p", call);
239 return call;
240}
241
242/*
243 * Initiate the call ack/resend/expiry timer.
244 */
245static void rxrpc_start_call_timer(struct rxrpc_call *call)
245void rxrpc_start_call_timer(struct rxrpc_call *call)
246{
247 unsigned long now = jiffies;
248 unsigned long j = now + MAX_JIFFY_OFFSET;
249
250 call->delay_ack_at = j;
251 call->ack_lost_at = j;
252 call->resend_at = j;
253 call->ping_at = j;

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282 struct semaphore *limiter = &rxrpc_call_limiter;
283
284 if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
285 limiter = &rxrpc_kernel_call_limiter;
286 up(limiter);
287}
288
289/*
246{
247 unsigned long now = jiffies;
248 unsigned long j = now + MAX_JIFFY_OFFSET;
249
250 call->delay_ack_at = j;
251 call->ack_lost_at = j;
252 call->resend_at = j;
253 call->ping_at = j;

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282 struct semaphore *limiter = &rxrpc_call_limiter;
283
284 if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
285 limiter = &rxrpc_kernel_call_limiter;
286 up(limiter);
287}
288
289/*
290 * Start the process of connecting a call. We obtain a peer and a connection
291 * bundle, but the actual association of a call with a connection is offloaded
292 * to the I/O thread to simplify locking.
293 */
294static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)
295{
296 struct rxrpc_local *local = call->local;
297 int ret = 0;
298
299 _enter("{%d,%lx},", call->debug_id, call->user_call_ID);
300
301 call->peer = rxrpc_lookup_peer(local, &call->dest_srx, gfp);
302 if (!call->peer)
303 goto error;
304
305 ret = rxrpc_look_up_bundle(call, gfp);
306 if (ret < 0)
307 goto error;
308
309 trace_rxrpc_client(NULL, -1, rxrpc_client_queue_new_call);
310 rxrpc_get_call(call, rxrpc_call_get_io_thread);
311 spin_lock(&local->client_call_lock);
312 list_add_tail(&call->wait_link, &local->new_client_calls);
313 spin_unlock(&local->client_call_lock);
314 rxrpc_wake_up_io_thread(local);
315 return 0;
316
317error:
318 __set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
319 return ret;
320}
321
322/*
290 * Set up a call for the given parameters.
291 * - Called with the socket lock held, which it must release.
292 * - If it returns a call, the call's lock will need releasing by the caller.
293 */
294struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
295 struct rxrpc_conn_parameters *cp,
296 struct sockaddr_rxrpc *srx,
297 struct rxrpc_call_params *p,

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364
365 /* Set up or get a connection record and set the protocol parameters,
366 * including channel number and call ID.
367 */
368 ret = rxrpc_connect_call(call, gfp);
369 if (ret < 0)
370 goto error_attached_to_socket;
371
323 * Set up a call for the given parameters.
324 * - Called with the socket lock held, which it must release.
325 * - If it returns a call, the call's lock will need releasing by the caller.
326 */
327struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
328 struct rxrpc_conn_parameters *cp,
329 struct sockaddr_rxrpc *srx,
330 struct rxrpc_call_params *p,

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397
398 /* Set up or get a connection record and set the protocol parameters,
399 * including channel number and call ID.
400 */
401 ret = rxrpc_connect_call(call, gfp);
402 if (ret < 0)
403 goto error_attached_to_socket;
404
372 rxrpc_see_call(call, rxrpc_call_see_connected);
373
374 rxrpc_start_call_timer(call);
375
376 _leave(" = %p [new]", call);
377 return call;
378
379 /* We unexpectedly found the user ID in the list after taking
380 * the call_lock. This shouldn't happen unless the user races
381 * with itself and tries to add the same user ID twice at the
382 * same time in different threads.
383 */
384error_dup_user_ID:
385 write_unlock(&rx->call_lock);
386 release_sock(&rx->sk);
387 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST);
388 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0,
389 rxrpc_call_see_userid_exists);
405 _leave(" = %p [new]", call);
406 return call;
407
408 /* We unexpectedly found the user ID in the list after taking
409 * the call_lock. This shouldn't happen unless the user races
410 * with itself and tries to add the same user ID twice at the
411 * same time in different threads.
412 */
413error_dup_user_ID:
414 write_unlock(&rx->call_lock);
415 release_sock(&rx->sk);
416 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST);
417 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0,
418 rxrpc_call_see_userid_exists);
390 rxrpc_release_call(rx, call);
391 mutex_unlock(&call->user_mutex);
392 rxrpc_put_call(call, rxrpc_call_put_userid_exists);
393 _leave(" = -EEXIST");
394 return ERR_PTR(-EEXIST);
395
396 /* We got an error, but the call is attached to the socket and is in
419 mutex_unlock(&call->user_mutex);
420 rxrpc_put_call(call, rxrpc_call_put_userid_exists);
421 _leave(" = -EEXIST");
422 return ERR_PTR(-EEXIST);
423
424 /* We got an error, but the call is attached to the socket and is in
397 * need of release. However, we might now race with recvmsg() when
398 * completing the call queues it. Return 0 from sys_sendmsg() and
425 * need of release. However, we might now race with recvmsg() when it
426 * completion notifies the socket. Return 0 from sys_sendmsg() and
399 * leave the error to recvmsg() to deal with.
400 */
401error_attached_to_socket:
402 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret,
403 rxrpc_call_see_connect_failed);
427 * leave the error to recvmsg() to deal with.
428 */
429error_attached_to_socket:
430 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret,
431 rxrpc_call_see_connect_failed);
404 set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
405 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, ret);
432 rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret);
406 _leave(" = c=%08x [err]", call->debug_id);
407 return call;
408}
409
410/*
411 * Set up an incoming call. call->conn points to the connection.
412 * This is called in BH context and isn't allowed to fail.
413 */

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455 * only defending against the data_ready handler (which we're called
456 * from) and the RESPONSE packet parser (which is only really
457 * interested in call_counter and can cope with a disagreement with the
458 * call pointer).
459 */
460 chan = sp->hdr.cid & RXRPC_CHANNELMASK;
461 conn->channels[chan].call_counter = call->call_id;
462 conn->channels[chan].call_id = call->call_id;
433 _leave(" = c=%08x [err]", call->debug_id);
434 return call;
435}
436
437/*
438 * Set up an incoming call. call->conn points to the connection.
439 * This is called in BH context and isn't allowed to fail.
440 */

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482 * only defending against the data_ready handler (which we're called
483 * from) and the RESPONSE packet parser (which is only really
484 * interested in call_counter and can cope with a disagreement with the
485 * call pointer).
486 */
487 chan = sp->hdr.cid & RXRPC_CHANNELMASK;
488 conn->channels[chan].call_counter = call->call_id;
489 conn->channels[chan].call_id = call->call_id;
463 rcu_assign_pointer(conn->channels[chan].call, call);
490 conn->channels[chan].call = call;
464 spin_unlock(&conn->state_lock);
465
466 spin_lock(&conn->peer->lock);
467 hlist_add_head(&call->error_link, &conn->peer->error_targets);
468 spin_unlock(&conn->peer->lock);
469
470 rxrpc_start_call_timer(call);
471 _leave("");

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515}
516
517/*
518 * Detach a call from its owning socket.
519 */
520void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
521{
522 struct rxrpc_connection *conn = call->conn;
491 spin_unlock(&conn->state_lock);
492
493 spin_lock(&conn->peer->lock);
494 hlist_add_head(&call->error_link, &conn->peer->error_targets);
495 spin_unlock(&conn->peer->lock);
496
497 rxrpc_start_call_timer(call);
498 _leave("");

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542}
543
544/*
545 * Detach a call from its owning socket.
546 */
547void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
548{
549 struct rxrpc_connection *conn = call->conn;
523 bool put = false;
550 bool put = false, putu = false;
524
525 _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref));
526
527 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
528 call->flags, rxrpc_call_see_release);
529
530 if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
531 BUG();

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550 if (put)
551 rxrpc_put_call(call, rxrpc_call_put_unnotify);
552
553 write_lock(&rx->call_lock);
554
555 if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
556 rb_erase(&call->sock_node, &rx->calls);
557 memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
551
552 _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref));
553
554 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
555 call->flags, rxrpc_call_see_release);
556
557 if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
558 BUG();

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577 if (put)
578 rxrpc_put_call(call, rxrpc_call_put_unnotify);
579
580 write_lock(&rx->call_lock);
581
582 if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
583 rb_erase(&call->sock_node, &rx->calls);
584 memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
558 rxrpc_put_call(call, rxrpc_call_put_userid_exists);
585 putu = true;
559 }
560
561 list_del(&call->sock_link);
562 write_unlock(&rx->call_lock);
563
564 _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
565
586 }
587
588 list_del(&call->sock_link);
589 write_unlock(&rx->call_lock);
590
591 _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
592
593 if (putu)
594 rxrpc_put_call(call, rxrpc_call_put_userid);
595
566 _leave("");
567}
568
569/*
570 * release all the calls associated with a socket
571 */
572void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
573{

--- 156 unchanged lines hidden --- 		596 _leave("");
597}
598
599/*
600 * release all the calls associated with a socket
601 */
602void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
603{

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