28 /* asynchronous incoming call initial processing */
134  * Allocate a call.
140 	struct afs_call *call;  in afs_alloc_call()  local
143 	call = kzalloc(sizeof(*call), gfp);  in afs_alloc_call()
144 	if (!call)  in afs_alloc_call()
147 	call->type = type;  in afs_alloc_call()
148 	call->net = net;  in afs_alloc_call()
149 	call->debug_id = atomic_inc_return(&rxrpc_debug_id);  in afs_alloc_call()
150 	refcount_set(&call->ref, 1);  in afs_alloc_call()
151 	INIT_WORK(&call->async_work, afs_process_async_call);  in afs_alloc_call()
152 	init_waitqueue_head(&call->waitq);  in afs_alloc_call()
153 	spin_lock_init(&call->state_lock);  in afs_alloc_call()
154 	call->iter = &call->def_iter;  in afs_alloc_call()
157 	trace_afs_call(call->debug_id, afs_call_trace_alloc, 1, o,  in afs_alloc_call()
159 	return call;  in afs_alloc_call()
163  * Dispose of a reference on a call.
165 void afs_put_call(struct afs_call *call)  in afs_put_call()  argument
167 	struct afs_net *net = call->net;  in afs_put_call()
168 	unsigned int debug_id = call->debug_id;  in afs_put_call()
172 	zero = __refcount_dec_and_test(&call->ref, &r);  in afs_put_call()
178 		ASSERT(!work_pending(&call->async_work));  in afs_put_call()
179 		ASSERT(call->type->name != NULL);  in afs_put_call()
181 		rxrpc_kernel_put_peer(call->peer);  in afs_put_call()
183 		if (call->rxcall) {  in afs_put_call()
184 			rxrpc_kernel_shutdown_call(net->socket, call->rxcall);  in afs_put_call()
185 			rxrpc_kernel_put_call(net->socket, call->rxcall);  in afs_put_call()
186 			call->rxcall = NULL;  in afs_put_call()
188 		if (call->type->destructor)  in afs_put_call()
189 			call->type->destructor(call);  in afs_put_call()
191 		afs_unuse_server_notime(call->net, call->server, afs_server_trace_put_call);  in afs_put_call()
192 		kfree(call->request);  in afs_put_call()
194 		trace_afs_call(call->debug_id, afs_call_trace_free, 0, o,  in afs_put_call()
196 		kfree(call);  in afs_put_call()
204 static struct afs_call *afs_get_call(struct afs_call *call,  in afs_get_call()  argument
209 	__refcount_inc(&call->ref, &r);  in afs_get_call()
211 	trace_afs_call(call->debug_id, why, r + 1,  in afs_get_call()
212 		       atomic_read(&call->net->nr_outstanding_calls),  in afs_get_call()
214 	return call;  in afs_get_call()
218  * Queue the call for actual work.
220 static void afs_queue_call_work(struct afs_call *call)  in afs_queue_call_work()  argument
222 	if (call->type->work) {  in afs_queue_call_work()
223 		INIT_WORK(&call->work, call->type->work);  in afs_queue_call_work()
225 		afs_get_call(call, afs_call_trace_work);  in afs_queue_call_work()
226 		if (!queue_work(afs_wq, &call->work))  in afs_queue_call_work()
227 			afs_put_call(call);  in afs_queue_call_work()
232  * allocate a call with flat request and reply buffers
238 	struct afs_call *call;  in afs_alloc_flat_call()  local
240 	call = afs_alloc_call(net, type, GFP_NOFS);  in afs_alloc_flat_call()
241 	if (!call)  in afs_alloc_flat_call()
245 		call->request_size = request_size;  in afs_alloc_flat_call()
246 		call->request = kmalloc(request_size, GFP_NOFS);  in afs_alloc_flat_call()
247 		if (!call->request)  in afs_alloc_flat_call()
252 		call->reply_max = reply_max;  in afs_alloc_flat_call()
253 		call->buffer = kmalloc(reply_max, GFP_NOFS);  in afs_alloc_flat_call()
254 		if (!call->buffer)  in afs_alloc_flat_call()
258 	afs_extract_to_buf(call, call->reply_max);  in afs_alloc_flat_call()
259 	call->operation_ID = type->op;  in afs_alloc_flat_call()
260 	init_waitqueue_head(&call->waitq);  in afs_alloc_flat_call()
261 	return call;  in afs_alloc_flat_call()
264 	afs_put_call(call);  in afs_alloc_flat_call()
270  * clean up a call with flat buffer
272 void afs_flat_call_destructor(struct afs_call *call)  in afs_flat_call_destructor()  argument
276 	kfree(call->request);  in afs_flat_call_destructor()
277 	call->request = NULL;  in afs_flat_call_destructor()
278 	kfree(call->buffer);  in afs_flat_call_destructor()
279 	call->buffer = NULL;  in afs_flat_call_destructor()
283  * Advance the AFS call state when the RxRPC call ends the transmit phase.
289 	struct afs_call *call = (struct afs_call *)call_user_ID;  in afs_notify_end_request_tx()  local
291 	afs_set_call_state(call, AFS_CALL_CL_REQUESTING, AFS_CALL_CL_AWAIT_REPLY);  in afs_notify_end_request_tx()
295  * Initiate a call and synchronously queue up the parameters for dispatch.  Any
296  * error is stored into the call struct, which the caller must check for.
298 void afs_make_call(struct afs_call *call, gfp_t gfp)  in afs_make_call()  argument
307 	_enter(",{%pISp+%u},", rxrpc_kernel_remote_addr(call->peer), call->service_id);  in afs_make_call()
309 	ASSERT(call->type != NULL);  in afs_make_call()
310 	ASSERT(call->type->name != NULL);  in afs_make_call()
313 	       call, call->type->name, key_serial(call->key),  in afs_make_call()
314 	       atomic_read(&call->net->nr_outstanding_calls));  in afs_make_call()
316 	trace_afs_make_call(call);  in afs_make_call()
322 	tx_total_len = call->request_size;  in afs_make_call()
323 	if (call->write_iter)  in afs_make_call()
324 		tx_total_len += iov_iter_count(call->write_iter);  in afs_make_call()
326 	/* If the call is going to be asynchronous, we need an extra ref for  in afs_make_call()
327 	 * the call to hold itself so the caller need not hang on to its ref.  in afs_make_call()
329 	if (call->async) {  in afs_make_call()
330 		afs_get_call(call, afs_call_trace_get);  in afs_make_call()
331 		call->drop_ref = true;  in afs_make_call()
334 	/* create a call */  in afs_make_call()
335 	rxcall = rxrpc_kernel_begin_call(call->net->socket, call->peer, call->key,  in afs_make_call()
336 					 (unsigned long)call,  in afs_make_call()
338 					 call->max_lifespan,  in afs_make_call()
340 					 (call->async ?  in afs_make_call()
343 					 call->service_id,  in afs_make_call()
344 					 call->upgrade,  in afs_make_call()
345 					 (call->intr ? RXRPC_PREINTERRUPTIBLE :  in afs_make_call()
347 					 call->debug_id);  in afs_make_call()
350 		call->error = ret;  in afs_make_call()
354 	call->rxcall = rxcall;  in afs_make_call()
355 	call->issue_time = ktime_get_real();  in afs_make_call()
358 	iov[0].iov_base	= call->request;  in afs_make_call()
359 	iov[0].iov_len	= call->request_size;  in afs_make_call()
363 	iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, iov, 1, call->request_size);  in afs_make_call()
366 	msg.msg_flags		= MSG_WAITALL | (call->write_iter ? MSG_MORE : 0);  in afs_make_call()
368 	ret = rxrpc_kernel_send_data(call->net->socket, rxcall,  in afs_make_call()
369 				     &msg, call->request_size,  in afs_make_call()
374 	if (call->write_iter) {  in afs_make_call()
375 		msg.msg_iter = *call->write_iter;  in afs_make_call()
377 		trace_afs_send_data(call, &msg);  in afs_make_call()
379 		ret = rxrpc_kernel_send_data(call->net->socket,  in afs_make_call()
380 					     call->rxcall, &msg,  in afs_make_call()
383 		*call->write_iter = msg.msg_iter;  in afs_make_call()
385 		trace_afs_sent_data(call, &msg, ret);  in afs_make_call()
391 	 * - and an asynchronous call may already have completed.  in afs_make_call()
393 	 * afs_wait_for_call_to_complete(call)  in afs_make_call()
400 		rxrpc_kernel_abort_call(call->net->socket, rxcall,  in afs_make_call()
406 		rxrpc_kernel_recv_data(call->net->socket, rxcall,  in afs_make_call()
408 				       &call->abort_code, &call->service_id);  in afs_make_call()
409 		call->responded = true;  in afs_make_call()
411 	call->error = ret;  in afs_make_call()
412 	trace_afs_call_done(call);  in afs_make_call()
414 	if (call->type->done)  in afs_make_call()
415 		call->type->done(call);  in afs_make_call()
417 	/* We need to dispose of the extra ref we grabbed for an async call.  in afs_make_call()
418 	 * The call, however, might be queued on afs_async_calls and we need to  in afs_make_call()
421 	if (call->rxcall)  in afs_make_call()
422 		rxrpc_kernel_shutdown_call(call->net->socket, call->rxcall);  in afs_make_call()
423 	if (call->async) {  in afs_make_call()
424 		if (cancel_work_sync(&call->async_work))  in afs_make_call()
425 			afs_put_call(call);  in afs_make_call()
426 		afs_set_call_complete(call, ret, 0);  in afs_make_call()
429 	call->error = ret;  in afs_make_call()
430 	call->state = AFS_CALL_COMPLETE;  in afs_make_call()
438 static void afs_log_error(struct afs_call *call, s32 remote_abort)  in afs_log_error()  argument
462 			  msg, call->type->name,  in afs_log_error()
463 			  rxrpc_kernel_remote_addr(call->peer));  in afs_log_error()
468  * deliver messages to a call
470 static void afs_deliver_to_call(struct afs_call *call)  in afs_deliver_to_call()  argument
477 	_enter("%s", call->type->name);  in afs_deliver_to_call()
479 	while (state = READ_ONCE(call->state),  in afs_deliver_to_call()
487 			iov_iter_kvec(&call->def_iter, ITER_DEST, NULL, 0, 0);  in afs_deliver_to_call()
488 			ret = rxrpc_kernel_recv_data(call->net->socket,  in afs_deliver_to_call()
489 						     call->rxcall, &call->def_iter,  in afs_deliver_to_call()
491 						     &call->service_id);  in afs_deliver_to_call()
492 			trace_afs_receive_data(call, &call->def_iter, false, ret);  in afs_deliver_to_call()
504 		ret = call->type->deliver(call);  in afs_deliver_to_call()
505 		state = READ_ONCE(call->state);  in afs_deliver_to_call()
506 		if (ret == 0 && call->unmarshalling_error)  in afs_deliver_to_call()
510 			call->responded = true;  in afs_deliver_to_call()
511 			afs_queue_call_work(call);  in afs_deliver_to_call()
513 				if (call->op)  in afs_deliver_to_call()
515 						&call->op->server->flags);  in afs_deliver_to_call()
525 			call->responded = true;  in afs_deliver_to_call()
526 			afs_log_error(call, call->abort_code);  in afs_deliver_to_call()
529 			call->responded = true;  in afs_deliver_to_call()
531 			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,  in afs_deliver_to_call()
536 			pr_err("kAFS: Call %u in bad state %u\n",  in afs_deliver_to_call()
537 			       call->debug_id, state);  in afs_deliver_to_call()
547 			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,  in afs_deliver_to_call()
553 			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,  in afs_deliver_to_call()
561 	if (call->type->done)  in afs_deliver_to_call()
562 		call->type->done(call);  in afs_deliver_to_call()
570 	afs_set_call_complete(call, ret, remote_abort);  in afs_deliver_to_call()
576  * Wait synchronously for a call to complete.
578 void afs_wait_for_call_to_complete(struct afs_call *call)  in afs_wait_for_call_to_complete()  argument
584 	if (!afs_check_call_state(call, AFS_CALL_COMPLETE)) {  in afs_wait_for_call_to_complete()
587 		add_wait_queue(&call->waitq, &myself);  in afs_wait_for_call_to_complete()
592 			if (!afs_check_call_state(call, AFS_CALL_COMPLETE) &&  in afs_wait_for_call_to_complete()
593 			    call->need_attention) {  in afs_wait_for_call_to_complete()
594 				call->need_attention = false;  in afs_wait_for_call_to_complete()
596 				afs_deliver_to_call(call);  in afs_wait_for_call_to_complete()
600 			if (afs_check_call_state(call, AFS_CALL_COMPLETE))  in afs_wait_for_call_to_complete()
603 			if (!rxrpc_kernel_check_life(call->net->socket, call->rxcall)) {  in afs_wait_for_call_to_complete()
604 				/* rxrpc terminated the call. */  in afs_wait_for_call_to_complete()
612 		remove_wait_queue(&call->waitq, &myself);  in afs_wait_for_call_to_complete()
616 	if (!afs_check_call_state(call, AFS_CALL_COMPLETE)) {  in afs_wait_for_call_to_complete()
618 			afs_set_call_complete(call, call->error, call->abort_code);  in afs_wait_for_call_to_complete()
620 			/* Kill off the call if it's still live. */  in afs_wait_for_call_to_complete()
621 			_debug("call interrupted");  in afs_wait_for_call_to_complete()
622 			if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall,  in afs_wait_for_call_to_complete()
625 				afs_set_call_complete(call, -EINTR, 0);  in afs_wait_for_call_to_complete()
631  * wake up a waiting call
636 	struct afs_call *call = (struct afs_call *)call_user_ID;  in afs_wake_up_call_waiter()  local
638 	call->need_attention = true;  in afs_wake_up_call_waiter()
639 	wake_up(&call->waitq);  in afs_wake_up_call_waiter()
643  * wake up an asynchronous call
648 	struct afs_call *call = (struct afs_call *)call_user_ID;  in afs_wake_up_async_call()  local
651 	trace_afs_notify_call(rxcall, call);  in afs_wake_up_async_call()
652 	call->need_attention = true;  in afs_wake_up_async_call()
654 	if (__refcount_inc_not_zero(&call->ref, &r)) {  in afs_wake_up_async_call()
655 		trace_afs_call(call->debug_id, afs_call_trace_wake, r + 1,  in afs_wake_up_async_call()
656 			       atomic_read(&call->net->nr_outstanding_calls),  in afs_wake_up_async_call()
659 		if (!queue_work(afs_async_calls, &call->async_work))  in afs_wake_up_async_call()
660 			afs_put_call(call);  in afs_wake_up_async_call()
665  * Perform I/O processing on an asynchronous call.  The work item carries a ref
666  * to the call struct that we either need to release or to pass on.
670 	struct afs_call *call = container_of(work, struct afs_call, async_work);  in afs_process_async_call()  local
674 	if (call->state < AFS_CALL_COMPLETE && call->need_attention) {  in afs_process_async_call()
675 		call->need_attention = false;  in afs_process_async_call()
676 		afs_deliver_to_call(call);  in afs_process_async_call()
679 	afs_put_call(call);  in afs_process_async_call()
685 	struct afs_call *call = (struct afs_call *)user_call_ID;  in afs_rx_attach()  local
687 	call->rxcall = rxcall;  in afs_rx_attach()
691  * Charge the incoming call preallocation.
697 	struct afs_call *call = net->spare_incoming_call;  in afs_charge_preallocation()  local
700 		if (!call) {  in afs_charge_preallocation()
701 			call = afs_alloc_call(net, &afs_RXCMxxxx, GFP_KERNEL);  in afs_charge_preallocation()
702 			if (!call)  in afs_charge_preallocation()
705 			call->drop_ref = true;  in afs_charge_preallocation()
706 			call->async = true;  in afs_charge_preallocation()
707 			call->state = AFS_CALL_SV_AWAIT_OP_ID;  in afs_charge_preallocation()
708 			init_waitqueue_head(&call->waitq);  in afs_charge_preallocation()
709 			afs_extract_to_tmp(call);  in afs_charge_preallocation()
715 					       (unsigned long)call,  in afs_charge_preallocation()
717 					       call->debug_id) < 0)  in afs_charge_preallocation()
719 		call = NULL;  in afs_charge_preallocation()
721 	net->spare_incoming_call = call;  in afs_charge_preallocation()
725  * Discard a preallocated call when a socket is shut down.
730 	struct afs_call *call = (struct afs_call *)user_call_ID;  in afs_rx_discard_new_call()  local
732 	call->rxcall = NULL;  in afs_rx_discard_new_call()
733 	afs_put_call(call);  in afs_rx_discard_new_call()
737  * Notification of an incoming call.
748  * Grab the operation ID from an incoming cache manager call.  The socket
751 static int afs_deliver_cm_op_id(struct afs_call *call)  in afs_deliver_cm_op_id()  argument
755 	_enter("{%zu}", iov_iter_count(call->iter));  in afs_deliver_cm_op_id()
758 	ret = afs_extract_data(call, true);  in afs_deliver_cm_op_id()
762 	call->operation_ID = ntohl(call->tmp);  in afs_deliver_cm_op_id()
763 	afs_set_call_state(call, AFS_CALL_SV_AWAIT_OP_ID, AFS_CALL_SV_AWAIT_REQUEST);  in afs_deliver_cm_op_id()
765 	/* ask the cache manager to route the call (it'll change the call type  in afs_deliver_cm_op_id()
767 	if (!afs_cm_incoming_call(call))  in afs_deliver_cm_op_id()
770 	trace_afs_cb_call(call);  in afs_deliver_cm_op_id()
774 	return call->type->deliver(call);  in afs_deliver_cm_op_id()
778  * Advance the AFS call state when an RxRPC service call ends the transmit
785 	struct afs_call *call = (struct afs_call *)call_user_ID;  in afs_notify_end_reply_tx()  local
787 	afs_set_call_state(call, AFS_CALL_SV_REPLYING, AFS_CALL_SV_AWAIT_ACK);  in afs_notify_end_reply_tx()
793 void afs_send_empty_reply(struct afs_call *call)  in afs_send_empty_reply()  argument
795 	struct afs_net *net = call->net;  in afs_send_empty_reply()
800 	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, 0);  in afs_send_empty_reply()
809 	switch (rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,  in afs_send_empty_reply()
817 		rxrpc_kernel_abort_call(net->socket, call->rxcall,  in afs_send_empty_reply()
830 void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)  in afs_send_simple_reply()  argument
832 	struct afs_net *net = call->net;  in afs_send_simple_reply()
839 	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, len);  in afs_send_simple_reply()
850 	n = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, len,  in afs_send_simple_reply()
860 		rxrpc_kernel_abort_call(net->socket, call->rxcall,  in afs_send_simple_reply()
870 int afs_extract_data(struct afs_call *call, bool want_more)  in afs_extract_data()  argument
872 	struct afs_net *net = call->net;  in afs_extract_data()
873 	struct iov_iter *iter = call->iter;  in afs_extract_data()
879 	       call->type->name, call->iov_len, iov_iter_count(iter), want_more);  in afs_extract_data()
881 	ret = rxrpc_kernel_recv_data(net->socket, call->rxcall, iter,  in afs_extract_data()
882 				     &call->iov_len, want_more, &remote_abort,  in afs_extract_data()
883 				     &call->service_id);  in afs_extract_data()
884 	trace_afs_receive_data(call, call->iter, want_more, ret);  in afs_extract_data()
888 	state = READ_ONCE(call->state);  in afs_extract_data()
892 			afs_set_call_state(call, state, AFS_CALL_CL_PROC_REPLY);  in afs_extract_data()
895 			afs_set_call_state(call, state, AFS_CALL_SV_REPLYING);  in afs_extract_data()
898 			kdebug("prem complete %d", call->error);  in afs_extract_data()
899 			return afs_io_error(call, afs_io_error_extract);  in afs_extract_data()
906 	afs_set_call_complete(call, ret, remote_abort);  in afs_extract_data()
913 noinline int afs_protocol_error(struct afs_call *call,  in afs_protocol_error()  argument
916 	trace_afs_protocol_error(call, cause);  in afs_protocol_error()
917 	if (call)  in afs_protocol_error()
918 		call->unmarshalling_error = true;  in afs_protocol_error()