78 void fuse_set_initialized(struct fuse_conn *fc)  in fuse_set_initialized()  argument
82 	fc->initialized = 1;  in fuse_set_initialized()
85 static bool fuse_block_alloc(struct fuse_conn *fc, bool for_background)  in fuse_block_alloc()  argument
87 	return !fc->initialized || (for_background && fc->blocked);  in fuse_block_alloc()
90 static void fuse_drop_waiting(struct fuse_conn *fc)  in fuse_drop_waiting()  argument
97 	if (atomic_dec_and_test(&fc->num_waiting) &&  in fuse_drop_waiting()
98 	    !READ_ONCE(fc->connected)) {  in fuse_drop_waiting()
100 		wake_up_all(&fc->blocked_waitq);  in fuse_drop_waiting()
108 	struct fuse_conn *fc = fm->fc;  in fuse_get_req()  local
111 	atomic_inc(&fc->num_waiting);  in fuse_get_req()
113 	if (fuse_block_alloc(fc, for_background)) {  in fuse_get_req()
115 		if (wait_event_killable_exclusive(fc->blocked_waitq,  in fuse_get_req()
116 				!fuse_block_alloc(fc, for_background)))  in fuse_get_req()
123 	if (!fc->connected)  in fuse_get_req()
127 	if (fc->conn_error)  in fuse_get_req()
134 			wake_up(&fc->blocked_waitq);  in fuse_get_req()
138 	req->in.h.uid = from_kuid(fc->user_ns, current_fsuid());  in fuse_get_req()
139 	req->in.h.gid = from_kgid(fc->user_ns, current_fsgid());  in fuse_get_req()
140 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);  in fuse_get_req()
154 	fuse_drop_waiting(fc);  in fuse_get_req()
160 	struct fuse_conn *fc = req->fm->fc;  in fuse_put_request()  local
168 			spin_lock(&fc->bg_lock);  in fuse_put_request()
169 			if (!fc->blocked)  in fuse_put_request()
170 				wake_up(&fc->blocked_waitq);  in fuse_put_request()
171 			spin_unlock(&fc->bg_lock);  in fuse_put_request()
176 			fuse_drop_waiting(fc);  in fuse_put_request()
236 void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,  in fuse_queue_forget()  argument
239 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_queue_forget()
255 static void flush_bg_queue(struct fuse_conn *fc)  in flush_bg_queue()  argument
257 	struct fuse_iqueue *fiq = &fc->iq;  in flush_bg_queue()
259 	while (fc->active_background < fc->max_background &&  in flush_bg_queue()
260 	       !list_empty(&fc->bg_queue)) {  in flush_bg_queue()
263 		req = list_first_entry(&fc->bg_queue, struct fuse_req, list);  in flush_bg_queue()
265 		fc->active_background++;  in flush_bg_queue()
283 	struct fuse_conn *fc = fm->fc;  in fuse_request_end()  local
284 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_request_end()
302 		spin_lock(&fc->bg_lock);  in fuse_request_end()
304 		if (fc->num_background == fc->max_background) {  in fuse_request_end()
305 			fc->blocked = 0;  in fuse_request_end()
306 			wake_up(&fc->blocked_waitq);  in fuse_request_end()
307 		} else if (!fc->blocked) {  in fuse_request_end()
314 			if (waitqueue_active(&fc->blocked_waitq))  in fuse_request_end()
315 				wake_up(&fc->blocked_waitq);  in fuse_request_end()
318 		if (fc->num_background == fc->congestion_threshold && fm->sb) {  in fuse_request_end()
322 		fc->num_background--;  in fuse_request_end()
323 		fc->active_background--;  in fuse_request_end()
324 		flush_bg_queue(fc);  in fuse_request_end()
325 		spin_unlock(&fc->bg_lock);  in fuse_request_end()
340 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in queue_interrupt()
370 	struct fuse_conn *fc = req->fm->fc;  in request_wait_answer()  local
371 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()
374 	if (!fc->no_interrupt) {  in request_wait_answer()
416 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in __fuse_request_send()
436 static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args)  in fuse_adjust_compat()  argument
438 	if (fc->minor < 4 && args->opcode == FUSE_STATFS)  in fuse_adjust_compat()
441 	if (fc->minor < 9) {  in fuse_adjust_compat()
457 	if (fc->minor < 12) {  in fuse_adjust_compat()
471 	struct fuse_conn *fc = req->fm->fc;  in fuse_force_creds()  local
473 	req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid());  in fuse_force_creds()
474 	req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid());  in fuse_force_creds()
475 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);  in fuse_force_creds()
489 	struct fuse_conn *fc = fm->fc;  in fuse_simple_request()  local
494 		atomic_inc(&fc->num_waiting);  in fuse_simple_request()
510 	fuse_adjust_compat(fc, args);  in fuse_simple_request()
529 	struct fuse_conn *fc = fm->fc;  in fuse_request_queue_background()  local
535 		atomic_inc(&fc->num_waiting);  in fuse_request_queue_background()
538 	spin_lock(&fc->bg_lock);  in fuse_request_queue_background()
539 	if (likely(fc->connected)) {  in fuse_request_queue_background()
540 		fc->num_background++;  in fuse_request_queue_background()
541 		if (fc->num_background == fc->max_background)  in fuse_request_queue_background()
542 			fc->blocked = 1;  in fuse_request_queue_background()
543 		if (fc->num_background == fc->congestion_threshold && fm->sb) {  in fuse_request_queue_background()
547 		list_add_tail(&req->list, &fc->bg_queue);  in fuse_request_queue_background()
548 		flush_bg_queue(fc);  in fuse_request_queue_background()
551 	spin_unlock(&fc->bg_lock);  in fuse_request_queue_background()
589 	struct fuse_iqueue *fiq = &fm->fc->iq;  in fuse_simple_notify_reply()
1176 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1181 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1200 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_read()  local
1201 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()
1223 			   fc->max_write))  in fuse_dev_do_read()
1242 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1254 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1289 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1404 static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,  in fuse_notify_poll()  argument
1418 	return fuse_notify_poll_wakeup(fc, &outarg);  in fuse_notify_poll()
1425 static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_inode()  argument
1439 	down_read(&fc->killsb);  in fuse_notify_inval_inode()
1440 	err = fuse_reverse_inval_inode(fc, outarg.ino,  in fuse_notify_inval_inode()
1442 	up_read(&fc->killsb);  in fuse_notify_inval_inode()
1450 static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_entry()  argument
1486 	down_read(&fc->killsb);  in fuse_notify_inval_entry()
1487 	err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name);  in fuse_notify_inval_entry()
1488 	up_read(&fc->killsb);  in fuse_notify_inval_entry()
1498 static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size,  in fuse_notify_delete()  argument
1534 	down_read(&fc->killsb);  in fuse_notify_delete()
1535 	err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name);  in fuse_notify_delete()
1536 	up_read(&fc->killsb);  in fuse_notify_delete()
1546 static int fuse_notify_store(struct fuse_conn *fc, unsigned int size,  in fuse_notify_store()  argument
1574 	down_read(&fc->killsb);  in fuse_notify_store()
1577 	inode = fuse_ilookup(fc, nodeid,  NULL);  in fuse_notify_store()
1623 	up_read(&fc->killsb);  in fuse_notify_store()
1655 	struct fuse_conn *fc = fm->fc;  in fuse_retrieve()  local
1664 	num = min(outarg->size, fc->max_write);  in fuse_retrieve()
1671 	num_pages = min(num_pages, fc->max_pages);  in fuse_retrieve()
1724 static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size,  in fuse_notify_retrieve()  argument
1743 	down_read(&fc->killsb);  in fuse_notify_retrieve()
1747 	inode = fuse_ilookup(fc, nodeid, &fm);  in fuse_notify_retrieve()
1752 	up_read(&fc->killsb);  in fuse_notify_retrieve()
1761 static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,  in fuse_notify()  argument
1769 		return fuse_notify_poll(fc, size, cs);  in fuse_notify()
1772 		return fuse_notify_inval_inode(fc, size, cs);  in fuse_notify()
1775 		return fuse_notify_inval_entry(fc, size, cs);  in fuse_notify()
1778 		return fuse_notify_store(fc, size, cs);  in fuse_notify()
1781 		return fuse_notify_retrieve(fc, size, cs);  in fuse_notify()
1784 		return fuse_notify_delete(fc, size, cs);  in fuse_notify()
1837 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_write()  local
1859 		err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);  in fuse_dev_do_write()
1887 			fc->no_interrupt = 1;  in fuse_dev_do_write()
2045 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2071 static void end_polls(struct fuse_conn *fc)  in end_polls()  argument
2075 	p = rb_first(&fc->polled_files);  in end_polls()
2104 void fuse_abort_conn(struct fuse_conn *fc)  in fuse_abort_conn()  argument
2106 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()
2108 	spin_lock(&fc->lock);  in fuse_abort_conn()
2109 	if (fc->connected) {  in fuse_abort_conn()
2116 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2117 		fc->connected = 0;  in fuse_abort_conn()
2118 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2120 		fuse_set_initialized(fc);  in fuse_abort_conn()
2121 		list_for_each_entry(fud, &fc->devices, entry) {  in fuse_abort_conn()
2142 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2143 		fc->blocked = 0;  in fuse_abort_conn()
2144 		fc->max_background = UINT_MAX;  in fuse_abort_conn()
2145 		flush_bg_queue(fc);  in fuse_abort_conn()
2146 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2158 		end_polls(fc);  in fuse_abort_conn()
2159 		wake_up_all(&fc->blocked_waitq);  in fuse_abort_conn()
2160 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2164 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2169 void fuse_wait_aborted(struct fuse_conn *fc)  in fuse_wait_aborted()  argument
2173 	wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0);  in fuse_wait_aborted()
2181 		struct fuse_conn *fc = fud->fc;  in fuse_dev_release()  local
2195 		if (atomic_dec_and_test(&fc->dev_count)) {  in fuse_dev_release()
2196 			WARN_ON(fc->iq.fasync != NULL);  in fuse_dev_release()
2197 			fuse_abort_conn(fc);  in fuse_dev_release()
2213 	return fasync_helper(fd, file, on, &fud->fc->iq.fasync);  in fuse_dev_fasync()
2216 static int fuse_device_clone(struct fuse_conn *fc, struct file *new)  in fuse_device_clone()  argument
2223 	fud = fuse_dev_alloc_install(fc);  in fuse_device_clone()
2228 	atomic_inc(&fc->dev_count);  in fuse_device_clone()
2259 					err = fuse_device_clone(fud->fc, file);  in fuse_dev_ioctl()