79 void fuse_set_initialized(struct fuse_conn *fc)  in fuse_set_initialized()  argument
83 	fc->initialized = 1;  in fuse_set_initialized()
86 static bool fuse_block_alloc(struct fuse_conn *fc, bool for_background)  in fuse_block_alloc()  argument
88 	return !fc->initialized || (for_background && fc->blocked);  in fuse_block_alloc()
91 static void fuse_drop_waiting(struct fuse_conn *fc)  in fuse_drop_waiting()  argument
98 	if (atomic_dec_and_test(&fc->num_waiting) &&  in fuse_drop_waiting()
99 	    !READ_ONCE(fc->connected)) {  in fuse_drop_waiting()
101 		wake_up_all(&fc->blocked_waitq);  in fuse_drop_waiting()
109 	struct fuse_conn *fc = fm->fc;  in fuse_get_req()  local
112 	atomic_inc(&fc->num_waiting);  in fuse_get_req()
114 	if (fuse_block_alloc(fc, for_background)) {  in fuse_get_req()
116 		if (wait_event_killable_exclusive(fc->blocked_waitq,  in fuse_get_req()
117 				!fuse_block_alloc(fc, for_background)))  in fuse_get_req()
124 	if (!fc->connected)  in fuse_get_req()
128 	if (fc->conn_error)  in fuse_get_req()
135 			wake_up(&fc->blocked_waitq);  in fuse_get_req()
139 	req->in.h.uid = from_kuid(fc->user_ns, current_fsuid());  in fuse_get_req()
140 	req->in.h.gid = from_kgid(fc->user_ns, current_fsgid());  in fuse_get_req()
141 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);  in fuse_get_req()
155 	fuse_drop_waiting(fc);  in fuse_get_req()
161 	struct fuse_conn *fc = req->fm->fc;  in fuse_put_request()  local
169 			spin_lock(&fc->bg_lock);  in fuse_put_request()
170 			if (!fc->blocked)  in fuse_put_request()
171 				wake_up(&fc->blocked_waitq);  in fuse_put_request()
172 			spin_unlock(&fc->bg_lock);  in fuse_put_request()
177 			fuse_drop_waiting(fc);  in fuse_put_request()
240 void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,  in fuse_queue_forget()  argument
243 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()
259 static void flush_bg_queue(struct fuse_conn *fc)  in flush_bg_queue()  argument
261 	struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()
263 	while (fc->active_background < fc->max_background &&  in flush_bg_queue()
264 	       !list_empty(&fc->bg_queue)) {  in flush_bg_queue()
267 		req = list_first_entry(&fc->bg_queue, struct fuse_req, list);  in flush_bg_queue()
269 		fc->active_background++;  in flush_bg_queue()
287 	struct fuse_conn *fc = fm->fc;  in fuse_request_end()  local
288 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_end()
306 		spin_lock(&fc->bg_lock);  in fuse_request_end()
308 		if (fc->num_background == fc->max_background) {  in fuse_request_end()
309 			fc->blocked = 0;  in fuse_request_end()
310 			wake_up(&fc->blocked_waitq);  in fuse_request_end()
311 		} else if (!fc->blocked) {  in fuse_request_end()
318 			if (waitqueue_active(&fc->blocked_waitq))  in fuse_request_end()
319 				wake_up(&fc->blocked_waitq);  in fuse_request_end()
322 		if (fc->num_background == fc->congestion_threshold && fm->sb) {  in fuse_request_end()
326 		fc->num_background--;  in fuse_request_end()
327 		fc->active_background--;  in fuse_request_end()
328 		flush_bg_queue(fc);  in fuse_request_end()
329 		spin_unlock(&fc->bg_lock);  in fuse_request_end()
344 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in queue_interrupt()
374 	struct fuse_conn *fc = req->fm->fc;  in request_wait_answer()  local
375 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()
378 	if (!fc->no_interrupt) {  in request_wait_answer()
420 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in __fuse_request_send()
440 static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args)  in fuse_adjust_compat()  argument
442 	if (fc->minor < 4 && args->opcode == FUSE_STATFS)  in fuse_adjust_compat()
445 	if (fc->minor < 9) {  in fuse_adjust_compat()
461 	if (fc->minor < 12) {  in fuse_adjust_compat()
475 	struct fuse_conn *fc = req->fm->fc;  in fuse_force_creds()  local
477 	req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid());  in fuse_force_creds()
478 	req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid());  in fuse_force_creds()
479 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);  in fuse_force_creds()
493 	struct fuse_conn *fc = fm->fc;  in fuse_simple_request()  local
498 		atomic_inc(&fc->num_waiting);  in fuse_simple_request()
514 	fuse_adjust_compat(fc, args);  in fuse_simple_request()
533 	struct fuse_conn *fc = fm->fc;  in fuse_request_queue_background()  local
539 		atomic_inc(&fc->num_waiting);  in fuse_request_queue_background()
542 	spin_lock(&fc->bg_lock);  in fuse_request_queue_background()
543 	if (likely(fc->connected)) {  in fuse_request_queue_background()
544 		fc->num_background++;  in fuse_request_queue_background()
545 		if (fc->num_background == fc->max_background)  in fuse_request_queue_background()
546 			fc->blocked = 1;  in fuse_request_queue_background()
547 		if (fc->num_background == fc->congestion_threshold && fm->sb) {  in fuse_request_queue_background()
551 		list_add_tail(&req->list, &fc->bg_queue);  in fuse_request_queue_background()
552 		flush_bg_queue(fc);  in fuse_request_queue_background()
555 	spin_unlock(&fc->bg_lock);  in fuse_request_queue_background()
593 	struct fuse_iqueue *fiq = &fm->fc->iq;  in fuse_simple_notify_reply()
1201 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1206 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1225 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_read()  local
1226 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()
1248 			   fc->max_write))  in fuse_dev_do_read()
1267 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1279 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1323 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1438 static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,  in fuse_notify_poll()  argument
1452 	return fuse_notify_poll_wakeup(fc, &outarg);  in fuse_notify_poll()
1459 static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_inode()  argument
1473 	down_read(&fc->killsb);  in fuse_notify_inval_inode()
1474 	err = fuse_reverse_inval_inode(fc, outarg.ino,  in fuse_notify_inval_inode()
1476 	up_read(&fc->killsb);  in fuse_notify_inval_inode()
1484 static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_entry()  argument
1520 	down_read(&fc->killsb);  in fuse_notify_inval_entry()
1521 	err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name);  in fuse_notify_inval_entry()
1522 	up_read(&fc->killsb);  in fuse_notify_inval_entry()
1532 static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size,  in fuse_notify_delete()  argument
1568 	down_read(&fc->killsb);  in fuse_notify_delete()
1569 	err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name);  in fuse_notify_delete()
1570 	up_read(&fc->killsb);  in fuse_notify_delete()
1580 static int fuse_notify_store(struct fuse_conn *fc, unsigned int size,  in fuse_notify_store()  argument
1608 	down_read(&fc->killsb);  in fuse_notify_store()
1611 	inode = fuse_ilookup(fc, nodeid,  NULL);  in fuse_notify_store()
1657 	up_read(&fc->killsb);  in fuse_notify_store()
1689 	struct fuse_conn *fc = fm->fc;  in fuse_retrieve()  local
1698 	num = min(outarg->size, fc->max_write);  in fuse_retrieve()
1705 	num_pages = min(num_pages, fc->max_pages);  in fuse_retrieve()
1758 static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size,  in fuse_notify_retrieve()  argument
1777 	down_read(&fc->killsb);  in fuse_notify_retrieve()
1781 	inode = fuse_ilookup(fc, nodeid, &fm);  in fuse_notify_retrieve()
1786 	up_read(&fc->killsb);  in fuse_notify_retrieve()
1795 static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,  in fuse_notify()  argument
1803 		return fuse_notify_poll(fc, size, cs);  in fuse_notify()
1806 		return fuse_notify_inval_inode(fc, size, cs);  in fuse_notify()
1809 		return fuse_notify_inval_entry(fc, size, cs);  in fuse_notify()
1812 		return fuse_notify_store(fc, size, cs);  in fuse_notify()
1815 		return fuse_notify_retrieve(fc, size, cs);  in fuse_notify()
1818 		return fuse_notify_delete(fc, size, cs);  in fuse_notify()
1871 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_write()  local
1893 		err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);  in fuse_dev_do_write()
1921 			fc->no_interrupt = 1;  in fuse_dev_do_write()
2091 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2117 static void end_polls(struct fuse_conn *fc)  in end_polls()  argument
2121 	p = rb_first(&fc->polled_files);  in end_polls()
2150 void fuse_abort_conn(struct fuse_conn *fc)  in fuse_abort_conn()  argument
2152 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()
2154 	spin_lock(&fc->lock);  in fuse_abort_conn()
2155 	if (fc->connected) {  in fuse_abort_conn()
2162 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2163 		fc->connected = 0;  in fuse_abort_conn()
2164 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2166 		fuse_set_initialized(fc);  in fuse_abort_conn()
2167 		list_for_each_entry(fud, &fc->devices, entry) {  in fuse_abort_conn()
2188 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2189 		fc->blocked = 0;  in fuse_abort_conn()
2190 		fc->max_background = UINT_MAX;  in fuse_abort_conn()
2191 		flush_bg_queue(fc);  in fuse_abort_conn()
2192 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2204 		end_polls(fc);  in fuse_abort_conn()
2205 		wake_up_all(&fc->blocked_waitq);  in fuse_abort_conn()
2206 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2210 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2215 void fuse_wait_aborted(struct fuse_conn *fc)  in fuse_wait_aborted()  argument
2219 	wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0);  in fuse_wait_aborted()
2227 		struct fuse_conn *fc = fud->fc;  in fuse_dev_release()  local
2241 		if (atomic_dec_and_test(&fc->dev_count)) {  in fuse_dev_release()
2242 			WARN_ON(fc->iq.fasync != NULL);  in fuse_dev_release()
2243 			fuse_abort_conn(fc);  in fuse_dev_release()
2259 	return fasync_helper(fd, file, on, &fud->fc->iq.fasync);  in fuse_dev_fasync()
2262 static int fuse_device_clone(struct fuse_conn *fc, struct file *new)  in fuse_device_clone()  argument
2269 	fud = fuse_dev_alloc_install(fc);  in fuse_device_clone()
2274 	atomic_inc(&fc->dev_count);  in fuse_device_clone()
2305 					res = fuse_device_clone(fud->fc, file);  in fuse_dev_ioctl()