134 void fuse_set_initialized(struct fuse_conn *fc)  in fuse_set_initialized()  argument
138 	fc->initialized = 1;  in fuse_set_initialized()
141 static bool fuse_block_alloc(struct fuse_conn *fc, bool for_background)  in fuse_block_alloc()  argument
143 	return !fc->initialized || (for_background && fc->blocked);  in fuse_block_alloc()
146 static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,  in __fuse_get_req()  argument
151 	atomic_inc(&fc->num_waiting);  in __fuse_get_req()
153 	if (fuse_block_alloc(fc, for_background)) {  in __fuse_get_req()
158 		intr = wait_event_interruptible_exclusive(fc->blocked_waitq,  in __fuse_get_req()
159 				!fuse_block_alloc(fc, for_background));  in __fuse_get_req()
169 	if (!fc->connected)  in __fuse_get_req()
173 	if (fc->conn_error)  in __fuse_get_req()
180 			wake_up(&fc->blocked_waitq);  in __fuse_get_req()
192 	atomic_dec(&fc->num_waiting);  in __fuse_get_req()
196 struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages)  in fuse_get_req()  argument
198 	return __fuse_get_req(fc, npages, false);  in fuse_get_req()
202 struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc,  in fuse_get_req_for_background()  argument
205 	return __fuse_get_req(fc, npages, true);  in fuse_get_req_for_background()
214 static struct fuse_req *get_reserved_req(struct fuse_conn *fc,  in get_reserved_req()  argument
221 		wait_event(fc->reserved_req_waitq, ff->reserved_req);  in get_reserved_req()
222 		spin_lock(&fc->lock);  in get_reserved_req()
228 		spin_unlock(&fc->lock);  in get_reserved_req()
237 static void put_reserved_req(struct fuse_conn *fc, struct fuse_req *req)  in put_reserved_req()  argument
242 	spin_lock(&fc->lock);  in put_reserved_req()
246 	wake_up_all(&fc->reserved_req_waitq);  in put_reserved_req()
247 	spin_unlock(&fc->lock);  in put_reserved_req()
264 struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc,  in fuse_get_req_nofail_nopages()  argument
269 	atomic_inc(&fc->num_waiting);  in fuse_get_req_nofail_nopages()
270 	wait_event(fc->blocked_waitq, fc->initialized);  in fuse_get_req_nofail_nopages()
275 		req = get_reserved_req(fc, file);  in fuse_get_req_nofail_nopages()
283 void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)  in fuse_put_request()  argument
291 			spin_lock(&fc->lock);  in fuse_put_request()
292 			if (!fc->blocked)  in fuse_put_request()
293 				wake_up(&fc->blocked_waitq);  in fuse_put_request()
294 			spin_unlock(&fc->lock);  in fuse_put_request()
299 			atomic_dec(&fc->num_waiting);  in fuse_put_request()
303 			put_reserved_req(fc, req);  in fuse_put_request()
335 void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,  in fuse_queue_forget()  argument
338 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()
355 static void flush_bg_queue(struct fuse_conn *fc)  in flush_bg_queue()  argument
357 	while (fc->active_background < fc->max_background &&  in flush_bg_queue()
358 	       !list_empty(&fc->bg_queue)) {  in flush_bg_queue()
360 		struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()
362 		req = list_entry(fc->bg_queue.next, struct fuse_req, list);  in flush_bg_queue()
364 		fc->active_background++;  in flush_bg_queue()
380 static void request_end(struct fuse_conn *fc, struct fuse_req *req)  in request_end()  argument
382 	struct fuse_iqueue *fiq = &fc->iq;  in request_end()
393 		spin_lock(&fc->lock);  in request_end()
395 		if (fc->num_background == fc->max_background)  in request_end()
396 			fc->blocked = 0;  in request_end()
399 		if (!fc->blocked && waitqueue_active(&fc->blocked_waitq))  in request_end()
400 			wake_up(&fc->blocked_waitq);  in request_end()
402 		if (fc->num_background == fc->congestion_threshold &&  in request_end()
403 		    fc->connected && fc->bdi_initialized) {  in request_end()
404 			clear_bdi_congested(&fc->bdi, BLK_RW_SYNC);  in request_end()
405 			clear_bdi_congested(&fc->bdi, BLK_RW_ASYNC);  in request_end()
407 		fc->num_background--;  in request_end()
408 		fc->active_background--;  in request_end()
409 		flush_bg_queue(fc);  in request_end()
410 		spin_unlock(&fc->lock);  in request_end()
414 		req->end(fc, req);  in request_end()
415 	fuse_put_request(fc, req);  in request_end()
429 static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)  in request_wait_answer()  argument
431 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()
434 	if (!fc->no_interrupt) {  in request_wait_answer()
479 static void __fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)  in __fuse_request_send()  argument
481 	struct fuse_iqueue *fiq = &fc->iq;  in __fuse_request_send()
496 		request_wait_answer(fc, req);  in __fuse_request_send()
502 void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req)  in fuse_request_send()  argument
507 		atomic_inc(&fc->num_waiting);  in fuse_request_send()
509 	__fuse_request_send(fc, req);  in fuse_request_send()
513 static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args)  in fuse_adjust_compat()  argument
515 	if (fc->minor < 4 && args->in.h.opcode == FUSE_STATFS)  in fuse_adjust_compat()
518 	if (fc->minor < 9) {  in fuse_adjust_compat()
534 	if (fc->minor < 12) {  in fuse_adjust_compat()
546 ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args)  in fuse_simple_request()  argument
551 	req = fuse_get_req(fc, 0);  in fuse_simple_request()
556 	fuse_adjust_compat(fc, args);  in fuse_simple_request()
567 	fuse_request_send(fc, req);  in fuse_simple_request()
573 	fuse_put_request(fc, req);  in fuse_simple_request()
583 void fuse_request_send_background_locked(struct fuse_conn *fc,  in fuse_request_send_background_locked()  argument
589 		atomic_inc(&fc->num_waiting);  in fuse_request_send_background_locked()
592 	fc->num_background++;  in fuse_request_send_background_locked()
593 	if (fc->num_background == fc->max_background)  in fuse_request_send_background_locked()
594 		fc->blocked = 1;  in fuse_request_send_background_locked()
595 	if (fc->num_background == fc->congestion_threshold &&  in fuse_request_send_background_locked()
596 	    fc->bdi_initialized) {  in fuse_request_send_background_locked()
597 		set_bdi_congested(&fc->bdi, BLK_RW_SYNC);  in fuse_request_send_background_locked()
598 		set_bdi_congested(&fc->bdi, BLK_RW_ASYNC);  in fuse_request_send_background_locked()
600 	list_add_tail(&req->list, &fc->bg_queue);  in fuse_request_send_background_locked()
601 	flush_bg_queue(fc);  in fuse_request_send_background_locked()
604 void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req)  in fuse_request_send_background()  argument
607 	spin_lock(&fc->lock);  in fuse_request_send_background()
608 	if (fc->connected) {  in fuse_request_send_background()
609 		fuse_request_send_background_locked(fc, req);  in fuse_request_send_background()
610 		spin_unlock(&fc->lock);  in fuse_request_send_background()
612 		spin_unlock(&fc->lock);  in fuse_request_send_background()
614 		req->end(fc, req);  in fuse_request_send_background()
615 		fuse_put_request(fc, req);  in fuse_request_send_background()
620 static int fuse_request_send_notify_reply(struct fuse_conn *fc,  in fuse_request_send_notify_reply()  argument
624 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_send_notify_reply()
641 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_force_forget()  local
647 	req = fuse_get_req_nofail_nopages(fc, file);  in fuse_force_forget()
654 	__fuse_request_send(fc, req);  in fuse_force_forget()
656 	fuse_put_request(fc, req);  in fuse_force_forget()
1215 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1220 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1239 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_read()  local
1240 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()
1270 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1289 		request_end(fc, req);  in fuse_dev_do_read()
1329 	request_end(fc, req);  in fuse_dev_do_read()
1444 static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,  in fuse_notify_poll()  argument
1458 	return fuse_notify_poll_wakeup(fc, &outarg);  in fuse_notify_poll()
1465 static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_inode()  argument
1479 	down_read(&fc->killsb);  in fuse_notify_inval_inode()
1481 	if (fc->sb) {  in fuse_notify_inval_inode()
1482 		err = fuse_reverse_inval_inode(fc->sb, outarg.ino,  in fuse_notify_inval_inode()
1485 	up_read(&fc->killsb);  in fuse_notify_inval_inode()
1493 static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_entry()  argument
1530 	down_read(&fc->killsb);  in fuse_notify_inval_entry()
1532 	if (fc->sb)  in fuse_notify_inval_entry()
1533 		err = fuse_reverse_inval_entry(fc->sb, outarg.parent, 0, &name);  in fuse_notify_inval_entry()
1534 	up_read(&fc->killsb);  in fuse_notify_inval_entry()
1544 static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size,  in fuse_notify_delete()  argument
1581 	down_read(&fc->killsb);  in fuse_notify_delete()
1583 	if (fc->sb)  in fuse_notify_delete()
1584 		err = fuse_reverse_inval_entry(fc->sb, outarg.parent,  in fuse_notify_delete()
1586 	up_read(&fc->killsb);  in fuse_notify_delete()
1596 static int fuse_notify_store(struct fuse_conn *fc, unsigned int size,  in fuse_notify_store()  argument
1624 	down_read(&fc->killsb);  in fuse_notify_store()
1627 	if (!fc->sb)  in fuse_notify_store()
1630 	inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid);  in fuse_notify_store()
1676 	up_read(&fc->killsb);  in fuse_notify_store()
1682 static void fuse_retrieve_end(struct fuse_conn *fc, struct fuse_req *req)  in fuse_retrieve_end()  argument
1687 static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,  in fuse_retrieve()  argument
1712 	req = fuse_get_req(fc, num_pages);  in fuse_retrieve()
1749 	err = fuse_request_send_notify_reply(fc, req, outarg->notify_unique);  in fuse_retrieve()
1751 		fuse_retrieve_end(fc, req);  in fuse_retrieve()
1756 static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size,  in fuse_notify_retrieve()  argument
1773 	down_read(&fc->killsb);  in fuse_notify_retrieve()
1775 	if (fc->sb) {  in fuse_notify_retrieve()
1778 		inode = ilookup5(fc->sb, nodeid, fuse_inode_eq, &nodeid);  in fuse_notify_retrieve()
1780 			err = fuse_retrieve(fc, inode, &outarg);  in fuse_notify_retrieve()
1784 	up_read(&fc->killsb);  in fuse_notify_retrieve()
1793 static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,  in fuse_notify()  argument
1801 		return fuse_notify_poll(fc, size, cs);  in fuse_notify()
1804 		return fuse_notify_inval_inode(fc, size, cs);  in fuse_notify()
1807 		return fuse_notify_inval_entry(fc, size, cs);  in fuse_notify()
1810 		return fuse_notify_store(fc, size, cs);  in fuse_notify()
1813 		return fuse_notify_retrieve(fc, size, cs);  in fuse_notify()
1816 		return fuse_notify_delete(fc, size, cs);  in fuse_notify()
1870 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_write()  local
1891 		err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);  in fuse_dev_do_write()
1917 			fc->no_interrupt = 1;  in fuse_dev_do_write()
1919 			queue_interrupt(&fc->iq, req);  in fuse_dev_do_write()
1947 	request_end(fc, req);  in fuse_dev_do_write()
2062 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2080 static void end_requests(struct fuse_conn *fc, struct list_head *head)  in end_requests()  argument
2089 		request_end(fc, req);  in end_requests()
2093 static void end_polls(struct fuse_conn *fc)  in end_polls()  argument
2097 	p = rb_first(&fc->polled_files);  in end_polls()
2126 void fuse_abort_conn(struct fuse_conn *fc)  in fuse_abort_conn()  argument
2128 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()
2130 	spin_lock(&fc->lock);  in fuse_abort_conn()
2131 	if (fc->connected) {  in fuse_abort_conn()
2137 		fc->connected = 0;  in fuse_abort_conn()
2138 		fc->blocked = 0;  in fuse_abort_conn()
2139 		fuse_set_initialized(fc);  in fuse_abort_conn()
2140 		list_for_each_entry(fud, &fc->devices, entry) {  in fuse_abort_conn()
2158 		fc->max_background = UINT_MAX;  in fuse_abort_conn()
2159 		flush_bg_queue(fc);  in fuse_abort_conn()
2169 		end_polls(fc);  in fuse_abort_conn()
2170 		wake_up_all(&fc->blocked_waitq);  in fuse_abort_conn()
2171 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2177 			request_end(fc, req);  in fuse_abort_conn()
2179 		end_requests(fc, &to_end2);  in fuse_abort_conn()
2181 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2191 		struct fuse_conn *fc = fud->fc;  in fuse_dev_release()  local
2195 		end_requests(fc, &fpq->processing);  in fuse_dev_release()
2197 		if (atomic_dec_and_test(&fc->dev_count)) {  in fuse_dev_release()
2198 			WARN_ON(fc->iq.fasync != NULL);  in fuse_dev_release()
2199 			fuse_abort_conn(fc);  in fuse_dev_release()
2215 	return fasync_helper(fd, file, on, &fud->fc->iq.fasync);  in fuse_dev_fasync()
2218 static int fuse_device_clone(struct fuse_conn *fc, struct file *new)  in fuse_device_clone()  argument
2225 	fud = fuse_dev_alloc(fc);  in fuse_device_clone()
2230 	atomic_inc(&fc->dev_count);  in fuse_device_clone()
2261 					err = fuse_device_clone(fud->fc, file);  in fuse_dev_ioctl()