195 u64 fuse_get_unique(struct fuse_iqueue *fiq)  in fuse_get_unique()  argument
197 	fiq->reqctr += FUSE_REQ_ID_STEP;  in fuse_get_unique()
198 	return fiq->reqctr;  in fuse_get_unique()
208  * A new request is available, wake fiq->waitq
210 static void fuse_dev_wake_and_unlock(struct fuse_iqueue *fiq)  in fuse_dev_wake_and_unlock()  argument
211 __releases(fiq->lock)  in fuse_dev_wake_and_unlock()
213 	wake_up(&fiq->waitq);  in fuse_dev_wake_and_unlock()
214 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_dev_wake_and_unlock()
215 	spin_unlock(&fiq->lock);  in fuse_dev_wake_and_unlock()
225 static void queue_request_and_unlock(struct fuse_iqueue *fiq,  in queue_request_and_unlock()  argument
227 __releases(fiq->lock)  in queue_request_and_unlock()
232 	list_add_tail(&req->list, &fiq->pending);  in queue_request_and_unlock()
233 	fiq->ops->wake_pending_and_unlock(fiq);  in queue_request_and_unlock()
239 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()  local
244 	spin_lock(&fiq->lock);  in fuse_queue_forget()
245 	if (fiq->connected) {  in fuse_queue_forget()
246 		fiq->forget_list_tail->next = forget;  in fuse_queue_forget()
247 		fiq->forget_list_tail = forget;  in fuse_queue_forget()
248 		fiq->ops->wake_forget_and_unlock(fiq);  in fuse_queue_forget()
251 		spin_unlock(&fiq->lock);  in fuse_queue_forget()
257 	struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()  local
266 		spin_lock(&fiq->lock);  in flush_bg_queue()
267 		req->in.h.unique = fuse_get_unique(fiq);  in flush_bg_queue()
268 		queue_request_and_unlock(fiq, req);  in flush_bg_queue()
284 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_end()  local
295 		spin_lock(&fiq->lock);  in fuse_request_end()
297 		spin_unlock(&fiq->lock);  in fuse_request_end()
340 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in queue_interrupt()  local
342 	spin_lock(&fiq->lock);  in queue_interrupt()
345 		spin_unlock(&fiq->lock);  in queue_interrupt()
350 		list_add_tail(&req->intr_entry, &fiq->interrupts);  in queue_interrupt()
358 			spin_unlock(&fiq->lock);  in queue_interrupt()
361 		fiq->ops->wake_interrupt_and_unlock(fiq);  in queue_interrupt()
363 		spin_unlock(&fiq->lock);  in queue_interrupt()
371 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()  local
395 		spin_lock(&fiq->lock);  in request_wait_answer()
399 			spin_unlock(&fiq->lock);  in request_wait_answer()
404 		spin_unlock(&fiq->lock);  in request_wait_answer()
416 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in __fuse_request_send()  local
419 	spin_lock(&fiq->lock);  in __fuse_request_send()
420 	if (!fiq->connected) {  in __fuse_request_send()
421 		spin_unlock(&fiq->lock);  in __fuse_request_send()
424 		req->in.h.unique = fuse_get_unique(fiq);  in __fuse_request_send()
428 		queue_request_and_unlock(fiq, req);  in __fuse_request_send()
589 	struct fuse_iqueue *fiq = &fm->fc->iq;  in fuse_simple_notify_reply()  local
601 	spin_lock(&fiq->lock);  in fuse_simple_notify_reply()
602 	if (fiq->connected) {  in fuse_simple_notify_reply()
603 		queue_request_and_unlock(fiq, req);  in fuse_simple_notify_reply()
606 		spin_unlock(&fiq->lock);  in fuse_simple_notify_reply()
1039 static int forget_pending(struct fuse_iqueue *fiq)  in forget_pending()  argument
1041 	return fiq->forget_list_head.next != NULL;  in forget_pending()
1044 static int request_pending(struct fuse_iqueue *fiq)  in request_pending()  argument
1046 	return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) ||  in request_pending()
1047 		forget_pending(fiq);  in request_pending()
1056  * Called with fiq->lock held, releases it
1058 static int fuse_read_interrupt(struct fuse_iqueue *fiq,  in fuse_read_interrupt()  argument
1061 __releases(fiq->lock)  in fuse_read_interrupt()
1076 	spin_unlock(&fiq->lock);  in fuse_read_interrupt()
1088 struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,  in fuse_dequeue_forget()  argument
1092 	struct fuse_forget_link *head = fiq->forget_list_head.next;  in fuse_dequeue_forget()
1099 	fiq->forget_list_head.next = *newhead;  in fuse_dequeue_forget()
1101 	if (fiq->forget_list_head.next == NULL)  in fuse_dequeue_forget()
1102 		fiq->forget_list_tail = &fiq->forget_list_head;  in fuse_dequeue_forget()
1111 static int fuse_read_single_forget(struct fuse_iqueue *fiq,  in fuse_read_single_forget()  argument
1114 __releases(fiq->lock)  in fuse_read_single_forget()
1117 	struct fuse_forget_link *forget = fuse_dequeue_forget(fiq, 1, NULL);  in fuse_read_single_forget()
1124 		.unique = fuse_get_unique(fiq),  in fuse_read_single_forget()
1128 	spin_unlock(&fiq->lock);  in fuse_read_single_forget()
1144 static int fuse_read_batch_forget(struct fuse_iqueue *fiq,  in fuse_read_batch_forget()  argument
1146 __releases(fiq->lock)  in fuse_read_batch_forget()
1155 		.unique = fuse_get_unique(fiq),  in fuse_read_batch_forget()
1160 		spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1165 	head = fuse_dequeue_forget(fiq, max_forgets, &count);  in fuse_read_batch_forget()
1166 	spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1193 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1196 __releases(fiq->lock)  in fuse_read_forget()
1198 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1199 		return fuse_read_single_forget(fiq, cs, nbytes);  in fuse_read_forget()
1201 		return fuse_read_batch_forget(fiq, cs, nbytes);  in fuse_read_forget()
1218 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()  local
1245 		spin_lock(&fiq->lock);  in fuse_dev_do_read()
1246 		if (!fiq->connected || request_pending(fiq))  in fuse_dev_do_read()
1248 		spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1252 		err = wait_event_interruptible_exclusive(fiq->waitq,  in fuse_dev_do_read()
1253 				!fiq->connected || request_pending(fiq));  in fuse_dev_do_read()
1258 	if (!fiq->connected) {  in fuse_dev_do_read()
1263 	if (!list_empty(&fiq->interrupts)) {  in fuse_dev_do_read()
1264 		req = list_entry(fiq->interrupts.next, struct fuse_req,  in fuse_dev_do_read()
1266 		return fuse_read_interrupt(fiq, cs, nbytes, req);  in fuse_dev_do_read()
1269 	if (forget_pending(fiq)) {  in fuse_dev_do_read()
1270 		if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0)  in fuse_dev_do_read()
1271 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1273 		if (fiq->forget_batch <= -8)  in fuse_dev_do_read()
1274 			fiq->forget_batch = 16;  in fuse_dev_do_read()
1277 	req = list_entry(fiq->pending.next, struct fuse_req, list);  in fuse_dev_do_read()
1280 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1347 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
2069 	struct fuse_iqueue *fiq;  in fuse_dev_poll()  local
2075 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2076 	poll_wait(file, &fiq->waitq, wait);  in fuse_dev_poll()
2078 	spin_lock(&fiq->lock);  in fuse_dev_poll()
2079 	if (!fiq->connected)  in fuse_dev_poll()
2081 	else if (request_pending(fiq))  in fuse_dev_poll()
2083 	spin_unlock(&fiq->lock);  in fuse_dev_poll()
2136 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()  local
2178 		spin_lock(&fiq->lock);  in fuse_abort_conn()
2179 		fiq->connected = 0;  in fuse_abort_conn()
2180 		list_for_each_entry(req, &fiq->pending, list)  in fuse_abort_conn()
2182 		list_splice_tail_init(&fiq->pending, &to_end);  in fuse_abort_conn()
2183 		while (forget_pending(fiq))  in fuse_abort_conn()
2184 			kfree(fuse_dequeue_forget(fiq, 1, NULL));  in fuse_abort_conn()
2185 		wake_up_all(&fiq->waitq);  in fuse_abort_conn()
2186 		spin_unlock(&fiq->lock);  in fuse_abort_conn()
2187 		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_abort_conn()