320 static u64 fuse_get_unique(struct fuse_iqueue *fiq)  in fuse_get_unique()  argument
322 	return ++fiq->reqctr;  in fuse_get_unique()
325 static void queue_request(struct fuse_iqueue *fiq, struct fuse_req *req)  in queue_request()  argument
329 	list_add_tail(&req->list, &fiq->pending);  in queue_request()
330 	wake_up_locked(&fiq->waitq);  in queue_request()
331 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in queue_request()
337 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()  local
342 	spin_lock(&fiq->waitq.lock);  in fuse_queue_forget()
343 	if (fiq->connected) {  in fuse_queue_forget()
344 		fiq->forget_list_tail->next = forget;  in fuse_queue_forget()
345 		fiq->forget_list_tail = forget;  in fuse_queue_forget()
346 		wake_up_locked(&fiq->waitq);  in fuse_queue_forget()
347 		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_queue_forget()
351 	spin_unlock(&fiq->waitq.lock);  in fuse_queue_forget()
359 		struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()  local
364 		spin_lock(&fiq->waitq.lock);  in flush_bg_queue()
365 		req->in.h.unique = fuse_get_unique(fiq);  in flush_bg_queue()
366 		queue_request(fiq, req);  in flush_bg_queue()
367 		spin_unlock(&fiq->waitq.lock);  in flush_bg_queue()
381 	struct fuse_iqueue *fiq = &fc->iq;  in request_end()  local
386 	spin_lock(&fiq->waitq.lock);  in request_end()
388 	spin_unlock(&fiq->waitq.lock);  in request_end()
417 static void queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)  in queue_interrupt()  argument
419 	spin_lock(&fiq->waitq.lock);  in queue_interrupt()
421 		spin_unlock(&fiq->waitq.lock);  in queue_interrupt()
425 		list_add_tail(&req->intr_entry, &fiq->interrupts);  in queue_interrupt()
426 		wake_up_locked(&fiq->waitq);  in queue_interrupt()
428 	spin_unlock(&fiq->waitq.lock);  in queue_interrupt()
429 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in queue_interrupt()
434 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()  local
448 			queue_interrupt(fiq, req);  in request_wait_answer()
458 		spin_lock(&fiq->waitq.lock);  in request_wait_answer()
462 			spin_unlock(&fiq->waitq.lock);  in request_wait_answer()
467 		spin_unlock(&fiq->waitq.lock);  in request_wait_answer()
479 	struct fuse_iqueue *fiq = &fc->iq;  in __fuse_request_send()  local
482 	spin_lock(&fiq->waitq.lock);  in __fuse_request_send()
483 	if (!fiq->connected) {  in __fuse_request_send()
484 		spin_unlock(&fiq->waitq.lock);  in __fuse_request_send()
487 		req->in.h.unique = fuse_get_unique(fiq);  in __fuse_request_send()
488 		queue_request(fiq, req);  in __fuse_request_send()
492 		spin_unlock(&fiq->waitq.lock);  in __fuse_request_send()
621 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_send_notify_reply()  local
625 	spin_lock(&fiq->waitq.lock);  in fuse_request_send_notify_reply()
626 	if (fiq->connected) {  in fuse_request_send_notify_reply()
627 		queue_request(fiq, req);  in fuse_request_send_notify_reply()
630 	spin_unlock(&fiq->waitq.lock);  in fuse_request_send_notify_reply()
1057 static int forget_pending(struct fuse_iqueue *fiq)  in forget_pending()  argument
1059 	return fiq->forget_list_head.next != NULL;  in forget_pending()
1062 static int request_pending(struct fuse_iqueue *fiq)  in request_pending()  argument
1064 	return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) ||  in request_pending()
1065 		forget_pending(fiq);  in request_pending()
1076 static int fuse_read_interrupt(struct fuse_iqueue *fiq,  in fuse_read_interrupt()  argument
1079 __releases(fiq->waitq.lock)  in fuse_read_interrupt()
1087 	req->intr_unique = fuse_get_unique(fiq);  in fuse_read_interrupt()
1095 	spin_unlock(&fiq->waitq.lock);  in fuse_read_interrupt()
1107 static struct fuse_forget_link *dequeue_forget(struct fuse_iqueue *fiq,  in dequeue_forget()  argument
1111 	struct fuse_forget_link *head = fiq->forget_list_head.next;  in dequeue_forget()
1118 	fiq->forget_list_head.next = *newhead;  in dequeue_forget()
1120 	if (fiq->forget_list_head.next == NULL)  in dequeue_forget()
1121 		fiq->forget_list_tail = &fiq->forget_list_head;  in dequeue_forget()
1129 static int fuse_read_single_forget(struct fuse_iqueue *fiq,  in fuse_read_single_forget()  argument
1132 __releases(fiq->waitq.lock)  in fuse_read_single_forget()
1135 	struct fuse_forget_link *forget = dequeue_forget(fiq, 1, NULL);  in fuse_read_single_forget()
1142 		.unique = fuse_get_unique(fiq),  in fuse_read_single_forget()
1146 	spin_unlock(&fiq->waitq.lock);  in fuse_read_single_forget()
1162 static int fuse_read_batch_forget(struct fuse_iqueue *fiq,  in fuse_read_batch_forget()  argument
1164 __releases(fiq->waitq.lock)  in fuse_read_batch_forget()
1173 		.unique = fuse_get_unique(fiq),  in fuse_read_batch_forget()
1178 		spin_unlock(&fiq->waitq.lock);  in fuse_read_batch_forget()
1183 	head = dequeue_forget(fiq, max_forgets, &count);  in fuse_read_batch_forget()
1184 	spin_unlock(&fiq->waitq.lock);  in fuse_read_batch_forget()
1211 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1214 __releases(fiq->waitq.lock)  in fuse_read_forget()
1216 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1217 		return fuse_read_single_forget(fiq, cs, nbytes);  in fuse_read_forget()
1219 		return fuse_read_batch_forget(fiq, cs, nbytes);  in fuse_read_forget()
1236 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()  local
1243 	spin_lock(&fiq->waitq.lock);  in fuse_dev_do_read()
1245 	if ((file->f_flags & O_NONBLOCK) && fiq->connected &&  in fuse_dev_do_read()
1246 	    !request_pending(fiq))  in fuse_dev_do_read()
1249 	err = wait_event_interruptible_exclusive_locked(fiq->waitq,  in fuse_dev_do_read()
1250 				!fiq->connected || request_pending(fiq));  in fuse_dev_do_read()
1254 	if (!fiq->connected) {  in fuse_dev_do_read()
1259 	if (!list_empty(&fiq->interrupts)) {  in fuse_dev_do_read()
1260 		req = list_entry(fiq->interrupts.next, struct fuse_req,  in fuse_dev_do_read()
1262 		return fuse_read_interrupt(fiq, cs, nbytes, req);  in fuse_dev_do_read()
1265 	if (forget_pending(fiq)) {  in fuse_dev_do_read()
1266 		if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0)  in fuse_dev_do_read()
1267 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1269 		if (fiq->forget_batch <= -8)  in fuse_dev_do_read()
1270 			fiq->forget_batch = 16;  in fuse_dev_do_read()
1273 	req = list_entry(fiq->pending.next, struct fuse_req, list);  in fuse_dev_do_read()
1276 	spin_unlock(&fiq->waitq.lock);  in fuse_dev_do_read()
1319 		queue_interrupt(fiq, req);  in fuse_dev_do_read()
1331 	spin_unlock(&fiq->waitq.lock);  in fuse_dev_do_read()
2027 	struct fuse_iqueue *fiq;  in fuse_dev_poll()  local
2033 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2034 	poll_wait(file, &fiq->waitq, wait);  in fuse_dev_poll()
2036 	spin_lock(&fiq->waitq.lock);  in fuse_dev_poll()
2037 	if (!fiq->connected)  in fuse_dev_poll()
2039 	else if (request_pending(fiq))  in fuse_dev_poll()
2041 	spin_unlock(&fiq->waitq.lock);  in fuse_dev_poll()
2098 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()  local
2132 		spin_lock(&fiq->waitq.lock);  in fuse_abort_conn()
2133 		fiq->connected = 0;  in fuse_abort_conn()
2134 		list_for_each_entry(req, &fiq->pending, list)  in fuse_abort_conn()
2136 		list_splice_tail_init(&fiq->pending, &to_end);  in fuse_abort_conn()
2137 		while (forget_pending(fiq))  in fuse_abort_conn()
2138 			kfree(dequeue_forget(fiq, 1, NULL));  in fuse_abort_conn()
2139 		wake_up_all_locked(&fiq->waitq);  in fuse_abort_conn()
2140 		spin_unlock(&fiq->waitq.lock);  in fuse_abort_conn()
2141 		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_abort_conn()