207 static u64 fuse_get_unique_locked(struct fuse_iqueue *fiq)  in fuse_get_unique_locked()  argument
209 	fiq->reqctr += FUSE_REQ_ID_STEP;  in fuse_get_unique_locked()
210 	return fiq->reqctr;  in fuse_get_unique_locked()
213 u64 fuse_get_unique(struct fuse_iqueue *fiq)  in fuse_get_unique()  argument
217 	spin_lock(&fiq->lock);  in fuse_get_unique()
218 	ret = fuse_get_unique_locked(fiq);  in fuse_get_unique()
219 	spin_unlock(&fiq->lock);  in fuse_get_unique()
233 static void fuse_dev_wake_and_unlock(struct fuse_iqueue *fiq)  in fuse_dev_wake_and_unlock()  argument
234 __releases(fiq->lock)  in fuse_dev_wake_and_unlock()
236 	wake_up(&fiq->waitq);  in fuse_dev_wake_and_unlock()
237 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_dev_wake_and_unlock()
238 	spin_unlock(&fiq->lock);  in fuse_dev_wake_and_unlock()
241 void fuse_dev_queue_forget(struct fuse_iqueue *fiq,  in fuse_dev_queue_forget()  argument
244 	spin_lock(&fiq->lock);  in fuse_dev_queue_forget()
245 	if (fiq->connected) {  in fuse_dev_queue_forget()
246 		fiq->forget_list_tail->next = forget;  in fuse_dev_queue_forget()
247 		fiq->forget_list_tail = forget;  in fuse_dev_queue_forget()
248 		fuse_dev_wake_and_unlock(fiq);  in fuse_dev_queue_forget()
251 		spin_unlock(&fiq->lock);  in fuse_dev_queue_forget()
255 void fuse_dev_queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)  in fuse_dev_queue_interrupt()  argument
257 	spin_lock(&fiq->lock);  in fuse_dev_queue_interrupt()
259 		list_add_tail(&req->intr_entry, &fiq->interrupts);  in fuse_dev_queue_interrupt()
267 			spin_unlock(&fiq->lock);  in fuse_dev_queue_interrupt()
269 			fuse_dev_wake_and_unlock(fiq);  in fuse_dev_queue_interrupt()
272 		spin_unlock(&fiq->lock);  in fuse_dev_queue_interrupt()
276 static void fuse_dev_queue_req(struct fuse_iqueue *fiq, struct fuse_req *req)  in fuse_dev_queue_req()  argument
278 	spin_lock(&fiq->lock);  in fuse_dev_queue_req()
279 	if (fiq->connected) {  in fuse_dev_queue_req()
281 			req->in.h.unique = fuse_get_unique_locked(fiq);  in fuse_dev_queue_req()
282 		list_add_tail(&req->list, &fiq->pending);  in fuse_dev_queue_req()
283 		fuse_dev_wake_and_unlock(fiq);  in fuse_dev_queue_req()
285 		spin_unlock(&fiq->lock);  in fuse_dev_queue_req()
299 static void fuse_send_one(struct fuse_iqueue *fiq, struct fuse_req *req)  in fuse_send_one()  argument
305 	fiq->ops->send_req(fiq, req);  in fuse_send_one()
311 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()  local
316 	fiq->ops->send_forget(fiq, forget);  in fuse_queue_forget()
321 	struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()  local
330 		fuse_send_one(fiq, req);  in flush_bg_queue()
346 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_end()  local
358 		spin_lock(&fiq->lock);  in fuse_request_end()
360 		spin_unlock(&fiq->lock);  in fuse_request_end()
399 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in queue_interrupt()  local
405 	fiq->ops->send_interrupt(fiq, req);  in queue_interrupt()
413 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()  local
437 		spin_lock(&fiq->lock);  in request_wait_answer()
441 			spin_unlock(&fiq->lock);  in request_wait_answer()
446 		spin_unlock(&fiq->lock);  in request_wait_answer()
458 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in __fuse_request_send()  local
465 	fuse_send_one(fiq, req);  in __fuse_request_send()
576 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_queue_background_uring()  local
578 	req->in.h.unique = fuse_get_unique(fiq);  in fuse_request_queue_background_uring()
655 	struct fuse_iqueue *fiq = &fm->fc->iq;  in fuse_simple_notify_reply()  local
666 	fuse_send_one(fiq, req);  in fuse_simple_notify_reply()
1096 static int forget_pending(struct fuse_iqueue *fiq)  in forget_pending()  argument
1098 	return fiq->forget_list_head.next != NULL;  in forget_pending()
1101 static int request_pending(struct fuse_iqueue *fiq)  in request_pending()  argument
1103 	return !list_empty(&fiq->pending) || !list_empty(&fiq->interrupts) ||  in request_pending()
1104 		forget_pending(fiq);  in request_pending()
1115 static int fuse_read_interrupt(struct fuse_iqueue *fiq,  in fuse_read_interrupt()  argument
1118 __releases(fiq->lock)  in fuse_read_interrupt()
1133 	spin_unlock(&fiq->lock);  in fuse_read_interrupt()
1145 static struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,  in fuse_dequeue_forget()  argument
1149 	struct fuse_forget_link *head = fiq->forget_list_head.next;  in fuse_dequeue_forget()
1156 	fiq->forget_list_head.next = *newhead;  in fuse_dequeue_forget()
1158 	if (fiq->forget_list_head.next == NULL)  in fuse_dequeue_forget()
1159 		fiq->forget_list_tail = &fiq->forget_list_head;  in fuse_dequeue_forget()
1167 static int fuse_read_single_forget(struct fuse_iqueue *fiq,  in fuse_read_single_forget()  argument
1170 __releases(fiq->lock)  in fuse_read_single_forget()
1173 	struct fuse_forget_link *forget = fuse_dequeue_forget(fiq, 1, NULL);  in fuse_read_single_forget()
1180 		.unique = fuse_get_unique_locked(fiq),  in fuse_read_single_forget()
1184 	spin_unlock(&fiq->lock);  in fuse_read_single_forget()
1200 static int fuse_read_batch_forget(struct fuse_iqueue *fiq,  in fuse_read_batch_forget()  argument
1202 __releases(fiq->lock)  in fuse_read_batch_forget()
1211 		.unique = fuse_get_unique_locked(fiq),  in fuse_read_batch_forget()
1216 		spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1221 	head = fuse_dequeue_forget(fiq, max_forgets, &count);  in fuse_read_batch_forget()
1222 	spin_unlock(&fiq->lock);  in fuse_read_batch_forget()
1249 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1252 __releases(fiq->lock)  in fuse_read_forget()
1254 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1255 		return fuse_read_single_forget(fiq, cs, nbytes);  in fuse_read_forget()
1257 		return fuse_read_batch_forget(fiq, cs, nbytes);  in fuse_read_forget()
1274 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()  local
1301 		spin_lock(&fiq->lock);  in fuse_dev_do_read()
1302 		if (!fiq->connected || request_pending(fiq))  in fuse_dev_do_read()
1304 		spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1308 		err = wait_event_interruptible_exclusive(fiq->waitq,  in fuse_dev_do_read()
1309 				!fiq->connected || request_pending(fiq));  in fuse_dev_do_read()
1314 	if (!fiq->connected) {  in fuse_dev_do_read()
1319 	if (!list_empty(&fiq->interrupts)) {  in fuse_dev_do_read()
1320 		req = list_entry(fiq->interrupts.next, struct fuse_req,  in fuse_dev_do_read()
1322 		return fuse_read_interrupt(fiq, cs, nbytes, req);  in fuse_dev_do_read()
1325 	if (forget_pending(fiq)) {  in fuse_dev_do_read()
1326 		if (list_empty(&fiq->pending) || fiq->forget_batch-- > 0)  in fuse_dev_do_read()
1327 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1329 		if (fiq->forget_batch <= -8)  in fuse_dev_do_read()
1330 			fiq->forget_batch = 16;  in fuse_dev_do_read()
1333 	req = list_entry(fiq->pending.next, struct fuse_req, list);  in fuse_dev_do_read()
1336 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1403 	spin_unlock(&fiq->lock);  in fuse_dev_do_read()
1865 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_resend()  local
1892 	spin_lock(&fiq->lock);  in fuse_resend()
1893 	if (!fiq->connected) {  in fuse_resend()
1894 		spin_unlock(&fiq->lock);  in fuse_resend()
1901 	list_splice(&to_queue, &fiq->pending);  in fuse_resend()
1902 	fuse_dev_wake_and_unlock(fiq);  in fuse_resend()
2202 	struct fuse_iqueue *fiq;  in fuse_dev_poll()  local
2208 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2209 	poll_wait(file, &fiq->waitq, wait);  in fuse_dev_poll()
2211 	spin_lock(&fiq->lock);  in fuse_dev_poll()
2212 	if (!fiq->connected)  in fuse_dev_poll()
2214 	else if (request_pending(fiq))  in fuse_dev_poll()
2216 	spin_unlock(&fiq->lock);  in fuse_dev_poll()
2269 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()  local
2311 		spin_lock(&fiq->lock);  in fuse_abort_conn()
2312 		fiq->connected = 0;  in fuse_abort_conn()
2313 		list_for_each_entry(req, &fiq->pending, list)  in fuse_abort_conn()
2315 		list_splice_tail_init(&fiq->pending, &to_end);  in fuse_abort_conn()
2316 		while (forget_pending(fiq))  in fuse_abort_conn()
2317 			kfree(fuse_dequeue_forget(fiq, 1, NULL));  in fuse_abort_conn()
2318 		wake_up_all(&fiq->waitq);  in fuse_abort_conn()
2319 		spin_unlock(&fiq->lock);  in fuse_abort_conn()
2320 		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);  in fuse_abort_conn()