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 		fc->num_background--;  in fuse_request_end()
319 		fc->active_background--;  in fuse_request_end()
320 		flush_bg_queue(fc);  in fuse_request_end()
321 		spin_unlock(&fc->bg_lock);  in fuse_request_end()
336 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in queue_interrupt()
366 	struct fuse_conn *fc = req->fm->fc;  in request_wait_answer()  local
367 	struct fuse_iqueue *fiq = &fc->iq;  in request_wait_answer()
370 	if (!fc->no_interrupt) {  in request_wait_answer()
412 	struct fuse_iqueue *fiq = &req->fm->fc->iq;  in __fuse_request_send()
432 static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args)  in fuse_adjust_compat()  argument
434 	if (fc->minor < 4 && args->opcode == FUSE_STATFS)  in fuse_adjust_compat()
437 	if (fc->minor < 9) {  in fuse_adjust_compat()
453 	if (fc->minor < 12) {  in fuse_adjust_compat()
467 	struct fuse_conn *fc = req->fm->fc;  in fuse_force_creds()  local
469 	req->in.h.uid = from_kuid_munged(fc->user_ns, current_fsuid());  in fuse_force_creds()
470 	req->in.h.gid = from_kgid_munged(fc->user_ns, current_fsgid());  in fuse_force_creds()
471 	req->in.h.pid = pid_nr_ns(task_pid(current), fc->pid_ns);  in fuse_force_creds()
485 	struct fuse_conn *fc = fm->fc;  in fuse_simple_request()  local
490 		atomic_inc(&fc->num_waiting);  in fuse_simple_request()
506 	fuse_adjust_compat(fc, args);  in fuse_simple_request()
525 	struct fuse_conn *fc = fm->fc;  in fuse_request_queue_background()  local
531 		atomic_inc(&fc->num_waiting);  in fuse_request_queue_background()
534 	spin_lock(&fc->bg_lock);  in fuse_request_queue_background()
535 	if (likely(fc->connected)) {  in fuse_request_queue_background()
536 		fc->num_background++;  in fuse_request_queue_background()
537 		if (fc->num_background == fc->max_background)  in fuse_request_queue_background()
538 			fc->blocked = 1;  in fuse_request_queue_background()
539 		list_add_tail(&req->list, &fc->bg_queue);  in fuse_request_queue_background()
540 		flush_bg_queue(fc);  in fuse_request_queue_background()
543 	spin_unlock(&fc->bg_lock);  in fuse_request_queue_background()
581 	struct fuse_iqueue *fiq = &fm->fc->iq;  in fuse_simple_notify_reply()
1181 static int fuse_read_forget(struct fuse_conn *fc, struct fuse_iqueue *fiq,  in fuse_read_forget()  argument
1186 	if (fc->minor < 16 || fiq->forget_list_head.next->next == NULL)  in fuse_read_forget()
1205 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_read()  local
1206 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_dev_do_read()
1228 			   fc->max_write))  in fuse_dev_do_read()
1247 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1259 			return fuse_read_forget(fc, fiq, cs, nbytes);  in fuse_dev_do_read()
1303 		err = fc->aborted ? -ECONNABORTED : -ENODEV;  in fuse_dev_do_read()
1418 static int fuse_notify_poll(struct fuse_conn *fc, unsigned int size,  in fuse_notify_poll()  argument
1432 	return fuse_notify_poll_wakeup(fc, &outarg);  in fuse_notify_poll()
1439 static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_inode()  argument
1453 	down_read(&fc->killsb);  in fuse_notify_inval_inode()
1454 	err = fuse_reverse_inval_inode(fc, outarg.ino,  in fuse_notify_inval_inode()
1456 	up_read(&fc->killsb);  in fuse_notify_inval_inode()
1464 static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,  in fuse_notify_inval_entry()  argument
1500 	down_read(&fc->killsb);  in fuse_notify_inval_entry()
1501 	err = fuse_reverse_inval_entry(fc, outarg.parent, 0, &name);  in fuse_notify_inval_entry()
1502 	up_read(&fc->killsb);  in fuse_notify_inval_entry()
1512 static int fuse_notify_delete(struct fuse_conn *fc, unsigned int size,  in fuse_notify_delete()  argument
1548 	down_read(&fc->killsb);  in fuse_notify_delete()
1549 	err = fuse_reverse_inval_entry(fc, outarg.parent, outarg.child, &name);  in fuse_notify_delete()
1550 	up_read(&fc->killsb);  in fuse_notify_delete()
1560 static int fuse_notify_store(struct fuse_conn *fc, unsigned int size,  in fuse_notify_store()  argument
1588 	down_read(&fc->killsb);  in fuse_notify_store()
1591 	inode = fuse_ilookup(fc, nodeid,  NULL);  in fuse_notify_store()
1637 	up_read(&fc->killsb);  in fuse_notify_store()
1669 	struct fuse_conn *fc = fm->fc;  in fuse_retrieve()  local
1678 	num = min(outarg->size, fc->max_write);  in fuse_retrieve()
1685 	num_pages = min(num_pages, fc->max_pages);  in fuse_retrieve()
1738 static int fuse_notify_retrieve(struct fuse_conn *fc, unsigned int size,  in fuse_notify_retrieve()  argument
1757 	down_read(&fc->killsb);  in fuse_notify_retrieve()
1761 	inode = fuse_ilookup(fc, nodeid, &fm);  in fuse_notify_retrieve()
1766 	up_read(&fc->killsb);  in fuse_notify_retrieve()
1775 static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,  in fuse_notify()  argument
1783 		return fuse_notify_poll(fc, size, cs);  in fuse_notify()
1786 		return fuse_notify_inval_inode(fc, size, cs);  in fuse_notify()
1789 		return fuse_notify_inval_entry(fc, size, cs);  in fuse_notify()
1792 		return fuse_notify_store(fc, size, cs);  in fuse_notify()
1795 		return fuse_notify_retrieve(fc, size, cs);  in fuse_notify()
1798 		return fuse_notify_delete(fc, size, cs);  in fuse_notify()
1851 	struct fuse_conn *fc = fud->fc;  in fuse_dev_do_write()  local
1873 		err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);  in fuse_dev_do_write()
1901 			fc->no_interrupt = 1;  in fuse_dev_do_write()
2063 	fiq = &fud->fc->iq;  in fuse_dev_poll()
2089 static void end_polls(struct fuse_conn *fc)  in end_polls()  argument
2093 	p = rb_first(&fc->polled_files);  in end_polls()
2122 void fuse_abort_conn(struct fuse_conn *fc)  in fuse_abort_conn()  argument
2124 	struct fuse_iqueue *fiq = &fc->iq;  in fuse_abort_conn()
2126 	spin_lock(&fc->lock);  in fuse_abort_conn()
2127 	if (fc->connected) {  in fuse_abort_conn()
2134 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2135 		fc->connected = 0;  in fuse_abort_conn()
2136 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2138 		fuse_set_initialized(fc);  in fuse_abort_conn()
2139 		list_for_each_entry(fud, &fc->devices, entry) {  in fuse_abort_conn()
2160 		spin_lock(&fc->bg_lock);  in fuse_abort_conn()
2161 		fc->blocked = 0;  in fuse_abort_conn()
2162 		fc->max_background = UINT_MAX;  in fuse_abort_conn()
2163 		flush_bg_queue(fc);  in fuse_abort_conn()
2164 		spin_unlock(&fc->bg_lock);  in fuse_abort_conn()
2176 		end_polls(fc);  in fuse_abort_conn()
2177 		wake_up_all(&fc->blocked_waitq);  in fuse_abort_conn()
2178 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2182 		spin_unlock(&fc->lock);  in fuse_abort_conn()
2187 void fuse_wait_aborted(struct fuse_conn *fc)  in fuse_wait_aborted()  argument
2191 	wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0);  in fuse_wait_aborted()
2199 		struct fuse_conn *fc = fud->fc;  in fuse_dev_release()  local
2213 		if (atomic_dec_and_test(&fc->dev_count)) {  in fuse_dev_release()
2214 			WARN_ON(fc->iq.fasync != NULL);  in fuse_dev_release()
2215 			fuse_abort_conn(fc);  in fuse_dev_release()
2231 	return fasync_helper(fd, file, on, &fud->fc->iq.fasync);  in fuse_dev_fasync()
2234 static int fuse_device_clone(struct fuse_conn *fc, struct file *new)  in fuse_device_clone()  argument
2241 	fud = fuse_dev_alloc_install(fc);  in fuse_device_clone()
2246 	atomic_inc(&fc->dev_count);  in fuse_device_clone()
2276 					res = fuse_device_clone(fud->fc, file);  in fuse_dev_ioctl()