109 static int loop_global_lock_killable(struct loop_device *lo, bool global)  in loop_global_lock_killable()  argument
118 	err = mutex_lock_killable(&lo->lo_mutex);  in loop_global_lock_killable()
130 static void loop_global_unlock(struct loop_device *lo, bool global)  in loop_global_unlock()  argument
132 	mutex_unlock(&lo->lo_mutex);  in loop_global_unlock()
161 static loff_t get_loop_size(struct loop_device *lo, struct file *file)  in get_loop_size()  argument
163 	return get_size(lo->lo_offset, lo->lo_sizelimit, file);  in get_loop_size()
171 static bool lo_can_use_dio(struct loop_device *lo)  in lo_can_use_dio()  argument
173 	if (!(lo->lo_backing_file->f_mode & FMODE_CAN_ODIRECT))  in lo_can_use_dio()
175 	if (queue_logical_block_size(lo->lo_queue) < lo->lo_min_dio_size)  in lo_can_use_dio()
177 	if (lo->lo_offset & (lo->lo_min_dio_size - 1))  in lo_can_use_dio()
190 static inline void loop_update_dio(struct loop_device *lo)  in loop_update_dio()  argument
192 	lockdep_assert_held(&lo->lo_mutex);  in loop_update_dio()
193 	WARN_ON_ONCE(lo->lo_state == Lo_bound &&  in loop_update_dio()
194 		     lo->lo_queue->mq_freeze_depth == 0);  in loop_update_dio()
196 	if ((lo->lo_flags & LO_FLAGS_DIRECT_IO) && !lo_can_use_dio(lo))  in loop_update_dio()
197 		lo->lo_flags &= ~LO_FLAGS_DIRECT_IO;  in loop_update_dio()
208 static void loop_set_size(struct loop_device *lo, loff_t size)  in loop_set_size()  argument
210 	if (!set_capacity_and_notify(lo->lo_disk, size))  in loop_set_size()
211 		kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);  in loop_set_size()
214 static void loop_clear_limits(struct loop_device *lo, int mode)  in loop_clear_limits()  argument
216 	struct queue_limits lim = queue_limits_start_update(lo->lo_queue);  in loop_clear_limits()
233 	queue_limits_commit_update(lo->lo_queue, &lim);  in loop_clear_limits()
236 static int lo_fallocate(struct loop_device *lo, struct request *rq, loff_t pos,  in lo_fallocate()  argument
243 	struct file *file = lo->lo_backing_file;  in lo_fallocate()
248 	if (!bdev_max_discard_sectors(lo->lo_device))  in lo_fallocate()
260 		loop_clear_limits(lo, mode);  in lo_fallocate()
265 static int lo_req_flush(struct loop_device *lo, struct request *rq)  in lo_req_flush()  argument
267 	int ret = vfs_fsync(lo->lo_backing_file, 0);  in lo_req_flush()
328 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,  in lo_rw_aio()  argument
336 	struct file *file = lo->lo_backing_file;  in lo_rw_aio()
402 static int do_req_filebacked(struct loop_device *lo, struct request *rq)  in do_req_filebacked()  argument
405 	loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset;  in do_req_filebacked()
409 		return lo_req_flush(lo, rq);  in do_req_filebacked()
415 		return lo_fallocate(lo, rq, pos,  in do_req_filebacked()
420 		return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE);  in do_req_filebacked()
422 		return lo_rw_aio(lo, cmd, pos, ITER_SOURCE);  in do_req_filebacked()
424 		return lo_rw_aio(lo, cmd, pos, ITER_DEST);  in do_req_filebacked()
431 static void loop_reread_partitions(struct loop_device *lo)  in loop_reread_partitions()  argument
435 	mutex_lock(&lo->lo_disk->open_mutex);  in loop_reread_partitions()
436 	rc = bdev_disk_changed(lo->lo_disk, false);  in loop_reread_partitions()
437 	mutex_unlock(&lo->lo_disk->open_mutex);  in loop_reread_partitions()
440 			__func__, lo->lo_number, lo->lo_file_name, rc);  in loop_reread_partitions()
443 static unsigned int loop_query_min_dio_size(struct loop_device *lo)  in loop_query_min_dio_size()  argument
445 	struct file *file = lo->lo_backing_file;  in loop_query_min_dio_size()
497 static void loop_assign_backing_file(struct loop_device *lo, struct file *file)  in loop_assign_backing_file()  argument
499 	lo->lo_backing_file = file;  in loop_assign_backing_file()
500 	lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping);  in loop_assign_backing_file()
502 			lo->old_gfp_mask & ~(__GFP_IO | __GFP_FS));  in loop_assign_backing_file()
503 	if (lo->lo_backing_file->f_flags & O_DIRECT)  in loop_assign_backing_file()
504 		lo->lo_flags |= LO_FLAGS_DIRECT_IO;  in loop_assign_backing_file()
505 	lo->lo_min_dio_size = loop_query_min_dio_size(lo);  in loop_assign_backing_file()
527 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,  in loop_change_fd()  argument
545 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1);  in loop_change_fd()
548 	error = loop_global_lock_killable(lo, is_loop);  in loop_change_fd()
552 	if (lo->lo_state != Lo_bound)  in loop_change_fd()
557 	if (!(lo->lo_flags & LO_FLAGS_READ_ONLY))  in loop_change_fd()
564 	old_file = lo->lo_backing_file;  in loop_change_fd()
569 	if (get_loop_size(lo, file) != get_loop_size(lo, old_file))  in loop_change_fd()
580 	disk_force_media_change(lo->lo_disk);  in loop_change_fd()
581 	memflags = blk_mq_freeze_queue(lo->lo_queue);  in loop_change_fd()
582 	mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask);  in loop_change_fd()
583 	loop_assign_backing_file(lo, file);  in loop_change_fd()
584 	loop_update_dio(lo);  in loop_change_fd()
585 	blk_mq_unfreeze_queue(lo->lo_queue, memflags);  in loop_change_fd()
586 	partscan = lo->lo_flags & LO_FLAGS_PARTSCAN;  in loop_change_fd()
587 	loop_global_unlock(lo, is_loop);  in loop_change_fd()
603 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);  in loop_change_fd()
605 		loop_reread_partitions(lo);  in loop_change_fd()
609 	kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);  in loop_change_fd()
613 	loop_global_unlock(lo, is_loop);  in loop_change_fd()
616 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);  in loop_change_fd()
626 	struct loop_device *lo = disk->private_data;  in loop_attr_show()  local
628 	return callback(lo, page);  in loop_attr_show()
641 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf)  in loop_attr_backing_file_show()  argument
646 	spin_lock_irq(&lo->lo_lock);  in loop_attr_backing_file_show()
647 	if (lo->lo_backing_file)  in loop_attr_backing_file_show()
648 		p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1);  in loop_attr_backing_file_show()
649 	spin_unlock_irq(&lo->lo_lock);  in loop_attr_backing_file_show()
663 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf)  in loop_attr_offset_show()  argument
665 	return sysfs_emit(buf, "%llu\n", (unsigned long long)lo->lo_offset);  in loop_attr_offset_show()
668 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf)  in loop_attr_sizelimit_show()  argument
670 	return sysfs_emit(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit);  in loop_attr_sizelimit_show()
673 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf)  in loop_attr_autoclear_show()  argument
675 	int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR);  in loop_attr_autoclear_show()
680 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf)  in loop_attr_partscan_show()  argument
682 	int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN);  in loop_attr_partscan_show()
687 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf)  in loop_attr_dio_show()  argument
689 	int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO);  in loop_attr_dio_show()
716 static void loop_sysfs_init(struct loop_device *lo)  in loop_sysfs_init()  argument
718 	lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj,  in loop_sysfs_init()
722 static void loop_sysfs_exit(struct loop_device *lo)  in loop_sysfs_exit()  argument
724 	if (lo->sysfs_inited)  in loop_sysfs_exit()
725 		sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj,  in loop_sysfs_exit()
729 static void loop_get_discard_config(struct loop_device *lo,  in loop_get_discard_config()  argument
732 	struct file *file = lo->lo_backing_file;  in loop_get_discard_config()
764 	struct loop_device *lo;  member
783 static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd)  in loop_queue_work()  argument
790 	spin_lock_irq(&lo->lo_work_lock);  in loop_queue_work()
795 	node = &lo->worker_tree.rb_node;  in loop_queue_work()
830 	worker->lo = lo;  in loop_queue_work()
832 	rb_insert_color(&worker->rb_node, &lo->worker_tree);  in loop_queue_work()
845 		work = &lo->rootcg_work;  in loop_queue_work()
846 		cmd_list = &lo->rootcg_cmd_list;  in loop_queue_work()
849 	queue_work(lo->workqueue, work);  in loop_queue_work()
850 	spin_unlock_irq(&lo->lo_work_lock);  in loop_queue_work()
853 static void loop_set_timer(struct loop_device *lo)  in loop_set_timer()  argument
855 	timer_reduce(&lo->timer, jiffies + LOOP_IDLE_WORKER_TIMEOUT);  in loop_set_timer()
858 static void loop_free_idle_workers(struct loop_device *lo, bool delete_all)  in loop_free_idle_workers()  argument
862 	spin_lock_irq(&lo->lo_work_lock);  in loop_free_idle_workers()
863 	list_for_each_entry_safe(worker, pos, &lo->idle_worker_list,  in loop_free_idle_workers()
870 		rb_erase(&worker->rb_node, &lo->worker_tree);  in loop_free_idle_workers()
874 	if (!list_empty(&lo->idle_worker_list))  in loop_free_idle_workers()
875 		loop_set_timer(lo);  in loop_free_idle_workers()
876 	spin_unlock_irq(&lo->lo_work_lock);  in loop_free_idle_workers()
881 	struct loop_device *lo = container_of(timer, struct loop_device, timer);  in loop_free_idle_workers_timer()  local
883 	return loop_free_idle_workers(lo, false);  in loop_free_idle_workers_timer()
895 loop_set_status_from_info(struct loop_device *lo,  in loop_set_status_from_info()  argument
918 	lo->lo_offset = info->lo_offset;  in loop_set_status_from_info()
919 	lo->lo_sizelimit = info->lo_sizelimit;  in loop_set_status_from_info()
921 	memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE);  in loop_set_status_from_info()
922 	lo->lo_file_name[LO_NAME_SIZE-1] = 0;  in loop_set_status_from_info()
926 static unsigned int loop_default_blocksize(struct loop_device *lo)  in loop_default_blocksize()  argument
929 	if (lo->lo_flags & LO_FLAGS_DIRECT_IO)  in loop_default_blocksize()
930 		return lo->lo_min_dio_size;  in loop_default_blocksize()
934 static void loop_update_limits(struct loop_device *lo, struct queue_limits *lim,  in loop_update_limits()  argument
937 	struct file *file = lo->lo_backing_file;  in loop_update_limits()
948 		bsize = loop_default_blocksize(lo);  in loop_update_limits()
950 	loop_get_discard_config(lo, &granularity, &max_discard_sectors);  in loop_update_limits()
956 	if (file->f_op->fsync && !(lo->lo_flags & LO_FLAGS_READ_ONLY))  in loop_update_limits()
968 static int loop_configure(struct loop_device *lo, blk_mode_t mode,  in loop_configure()  argument
1001 	error = loop_global_lock_killable(lo, is_loop);  in loop_configure()
1006 	if (lo->lo_state != Lo_unbound)  in loop_configure()
1018 	error = loop_set_status_from_info(lo, &config->info);  in loop_configure()
1021 	lo->lo_flags = config->info.lo_flags;  in loop_configure()
1025 		lo->lo_flags |= LO_FLAGS_READ_ONLY;  in loop_configure()
1027 	if (!lo->workqueue) {  in loop_configure()
1028 		lo->workqueue = alloc_workqueue("loop%d",  in loop_configure()
1030 						0, lo->lo_number);  in loop_configure()
1031 		if (!lo->workqueue) {  in loop_configure()
1038 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1);  in loop_configure()
1040 	disk_force_media_change(lo->lo_disk);  in loop_configure()
1041 	set_disk_ro(lo->lo_disk, (lo->lo_flags & LO_FLAGS_READ_ONLY) != 0);  in loop_configure()
1043 	lo->lo_device = bdev;  in loop_configure()
1044 	loop_assign_backing_file(lo, file);  in loop_configure()
1046 	lim = queue_limits_start_update(lo->lo_queue);  in loop_configure()
1047 	loop_update_limits(lo, &lim, config->block_size);  in loop_configure()
1049 	error = queue_limits_commit_update(lo->lo_queue, &lim);  in loop_configure()
1060 	loop_update_dio(lo);  in loop_configure()
1061 	loop_sysfs_init(lo);  in loop_configure()
1063 	size = get_loop_size(lo, file);  in loop_configure()
1064 	loop_set_size(lo, size);  in loop_configure()
1069 	lo->lo_state = Lo_bound;  in loop_configure()
1071 		lo->lo_flags |= LO_FLAGS_PARTSCAN;  in loop_configure()
1072 	partscan = lo->lo_flags & LO_FLAGS_PARTSCAN;  in loop_configure()
1074 		clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state);  in loop_configure()
1076 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0);  in loop_configure()
1077 	kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);  in loop_configure()
1079 	loop_global_unlock(lo, is_loop);  in loop_configure()
1081 		loop_reread_partitions(lo);  in loop_configure()
1089 	loop_global_unlock(lo, is_loop);  in loop_configure()
1100 static void __loop_clr_fd(struct loop_device *lo)  in __loop_clr_fd()  argument
1104 	gfp_t gfp = lo->old_gfp_mask;  in __loop_clr_fd()
1106 	spin_lock_irq(&lo->lo_lock);  in __loop_clr_fd()
1107 	filp = lo->lo_backing_file;  in __loop_clr_fd()
1108 	lo->lo_backing_file = NULL;  in __loop_clr_fd()
1109 	spin_unlock_irq(&lo->lo_lock);  in __loop_clr_fd()
1111 	lo->lo_device = NULL;  in __loop_clr_fd()
1112 	lo->lo_offset = 0;  in __loop_clr_fd()
1113 	lo->lo_sizelimit = 0;  in __loop_clr_fd()
1114 	memset(lo->lo_file_name, 0, LO_NAME_SIZE);  in __loop_clr_fd()
1122 	lim = queue_limits_start_update(lo->lo_queue);  in __loop_clr_fd()
1126 	queue_limits_commit_update(lo->lo_queue, &lim);  in __loop_clr_fd()
1128 	invalidate_disk(lo->lo_disk);  in __loop_clr_fd()
1129 	loop_sysfs_exit(lo);  in __loop_clr_fd()
1131 	kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE);  in __loop_clr_fd()
1136 	disk_force_media_change(lo->lo_disk);  in __loop_clr_fd()
1138 	if (lo->lo_flags & LO_FLAGS_PARTSCAN) {  in __loop_clr_fd()
1149 		err = bdev_disk_changed(lo->lo_disk, false);  in __loop_clr_fd()
1152 				__func__, lo->lo_number, err);  in __loop_clr_fd()
1162 	lo->lo_flags = 0;  in __loop_clr_fd()
1164 		set_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state);  in __loop_clr_fd()
1165 	mutex_lock(&lo->lo_mutex);  in __loop_clr_fd()
1166 	lo->lo_state = Lo_unbound;  in __loop_clr_fd()
1167 	mutex_unlock(&lo->lo_mutex);  in __loop_clr_fd()
1177 static int loop_clr_fd(struct loop_device *lo)  in loop_clr_fd()  argument
1190 	err = loop_global_lock_killable(lo, true);  in loop_clr_fd()
1193 	if (lo->lo_state != Lo_bound) {  in loop_clr_fd()
1194 		loop_global_unlock(lo, true);  in loop_clr_fd()
1203 	lo->lo_flags |= LO_FLAGS_AUTOCLEAR;  in loop_clr_fd()
1204 	if (disk_openers(lo->lo_disk) == 1)  in loop_clr_fd()
1205 		lo->lo_state = Lo_rundown;  in loop_clr_fd()
1206 	loop_global_unlock(lo, true);  in loop_clr_fd()
1212 loop_set_status(struct loop_device *lo, const struct loop_info64 *info)  in loop_set_status()  argument
1219 	err = mutex_lock_killable(&lo->lo_mutex);  in loop_set_status()
1222 	if (lo->lo_state != Lo_bound) {  in loop_set_status()
1227 	if (lo->lo_offset != info->lo_offset ||  in loop_set_status()
1228 	    lo->lo_sizelimit != info->lo_sizelimit) {  in loop_set_status()
1230 		sync_blockdev(lo->lo_device);  in loop_set_status()
1231 		invalidate_bdev(lo->lo_device);  in loop_set_status()
1235 	memflags = blk_mq_freeze_queue(lo->lo_queue);  in loop_set_status()
1237 	err = loop_set_status_from_info(lo, info);  in loop_set_status()
1241 	partscan = !(lo->lo_flags & LO_FLAGS_PARTSCAN) &&  in loop_set_status()
1244 	lo->lo_flags &= ~LOOP_SET_STATUS_CLEARABLE_FLAGS;  in loop_set_status()
1245 	lo->lo_flags |= (info->lo_flags & LOOP_SET_STATUS_SETTABLE_FLAGS);  in loop_set_status()
1248 		loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit,  in loop_set_status()
1249 					   lo->lo_backing_file);  in loop_set_status()
1250 		loop_set_size(lo, new_size);  in loop_set_status()
1254 	loop_update_dio(lo);  in loop_set_status()
1257 	blk_mq_unfreeze_queue(lo->lo_queue, memflags);  in loop_set_status()
1259 		clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state);  in loop_set_status()
1261 	mutex_unlock(&lo->lo_mutex);  in loop_set_status()
1263 		loop_reread_partitions(lo);  in loop_set_status()
1269 loop_get_status(struct loop_device *lo, struct loop_info64 *info)  in loop_get_status()  argument
1275 	ret = mutex_lock_killable(&lo->lo_mutex);  in loop_get_status()
1278 	if (lo->lo_state != Lo_bound) {  in loop_get_status()
1279 		mutex_unlock(&lo->lo_mutex);  in loop_get_status()
1284 	info->lo_number = lo->lo_number;  in loop_get_status()
1285 	info->lo_offset = lo->lo_offset;  in loop_get_status()
1286 	info->lo_sizelimit = lo->lo_sizelimit;  in loop_get_status()
1287 	info->lo_flags = lo->lo_flags;  in loop_get_status()
1288 	memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE);  in loop_get_status()
1291 	path = lo->lo_backing_file->f_path;  in loop_get_status()
1293 	mutex_unlock(&lo->lo_mutex);  in loop_get_status()
1341 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg)  in loop_set_status_old()  argument
1349 	return loop_set_status(lo, &info64);  in loop_set_status_old()
1353 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg)  in loop_set_status64()  argument
1359 	return loop_set_status(lo, &info64);  in loop_set_status64()
1363 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) {  in loop_get_status_old()  argument
1370 	err = loop_get_status(lo, &info64);  in loop_get_status_old()
1380 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) {  in loop_get_status64()  argument
1386 	err = loop_get_status(lo, &info64);  in loop_get_status64()
1393 static int loop_set_capacity(struct loop_device *lo)  in loop_set_capacity()  argument
1397 	if (unlikely(lo->lo_state != Lo_bound))  in loop_set_capacity()
1400 	size = get_loop_size(lo, lo->lo_backing_file);  in loop_set_capacity()
1401 	loop_set_size(lo, size);  in loop_set_capacity()
1406 static int loop_set_dio(struct loop_device *lo, unsigned long arg)  in loop_set_dio()  argument
1411 	if (lo->lo_state != Lo_bound)  in loop_set_dio()
1413 	if (use_dio == !!(lo->lo_flags & LO_FLAGS_DIRECT_IO))  in loop_set_dio()
1417 		if (!lo_can_use_dio(lo))  in loop_set_dio()
1420 		vfs_fsync(lo->lo_backing_file, 0);  in loop_set_dio()
1423 	memflags = blk_mq_freeze_queue(lo->lo_queue);  in loop_set_dio()
1425 		lo->lo_flags |= LO_FLAGS_DIRECT_IO;  in loop_set_dio()
1427 		lo->lo_flags &= ~LO_FLAGS_DIRECT_IO;  in loop_set_dio()
1428 	blk_mq_unfreeze_queue(lo->lo_queue, memflags);  in loop_set_dio()
1432 static int loop_set_block_size(struct loop_device *lo, unsigned long arg)  in loop_set_block_size()  argument
1438 	if (lo->lo_state != Lo_bound)  in loop_set_block_size()
1441 	if (lo->lo_queue->limits.logical_block_size == arg)  in loop_set_block_size()
1444 	sync_blockdev(lo->lo_device);  in loop_set_block_size()
1445 	invalidate_bdev(lo->lo_device);  in loop_set_block_size()
1447 	lim = queue_limits_start_update(lo->lo_queue);  in loop_set_block_size()
1448 	loop_update_limits(lo, &lim, arg);  in loop_set_block_size()
1450 	memflags = blk_mq_freeze_queue(lo->lo_queue);  in loop_set_block_size()
1451 	err = queue_limits_commit_update(lo->lo_queue, &lim);  in loop_set_block_size()
1452 	loop_update_dio(lo);  in loop_set_block_size()
1453 	blk_mq_unfreeze_queue(lo->lo_queue, memflags);  in loop_set_block_size()
1458 static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd,  in lo_simple_ioctl()  argument
1463 	err = mutex_lock_killable(&lo->lo_mutex);  in lo_simple_ioctl()
1468 		err = loop_set_capacity(lo);  in lo_simple_ioctl()
1471 		err = loop_set_dio(lo, arg);  in lo_simple_ioctl()
1474 		err = loop_set_block_size(lo, arg);  in lo_simple_ioctl()
1479 	mutex_unlock(&lo->lo_mutex);  in lo_simple_ioctl()
1486 	struct loop_device *lo = bdev->bd_disk->private_data;  in lo_ioctl()  local
1502 		return loop_configure(lo, mode, bdev, &config);  in lo_ioctl()
1510 		return loop_configure(lo, mode, bdev, &config);  in lo_ioctl()
1513 		return loop_change_fd(lo, bdev, arg);  in lo_ioctl()
1515 		return loop_clr_fd(lo);  in lo_ioctl()
1519 			err = loop_set_status_old(lo, argp);  in lo_ioctl()
1522 		return loop_get_status_old(lo, argp);  in lo_ioctl()
1526 			err = loop_set_status64(lo, argp);  in lo_ioctl()
1529 		return loop_get_status64(lo, argp);  in lo_ioctl()
1537 		err = lo_simple_ioctl(lo, cmd, arg);  in lo_ioctl()
1617 loop_set_status_compat(struct loop_device *lo,  in loop_set_status_compat()  argument
1626 	return loop_set_status(lo, &info64);  in loop_set_status_compat()
1630 loop_get_status_compat(struct loop_device *lo,  in loop_get_status_compat()  argument
1638 	err = loop_get_status(lo, &info64);  in loop_get_status_compat()
1647 	struct loop_device *lo = bdev->bd_disk->private_data;  in lo_compat_ioctl()  local
1652 		err = loop_set_status_compat(lo,  in lo_compat_ioctl()
1656 		err = loop_get_status_compat(lo,  in lo_compat_ioctl()
1682 	struct loop_device *lo = disk->private_data;  in lo_open()  local
1685 	err = mutex_lock_killable(&lo->lo_mutex);  in lo_open()
1689 	if (lo->lo_state == Lo_deleting || lo->lo_state == Lo_rundown)  in lo_open()
1691 	mutex_unlock(&lo->lo_mutex);  in lo_open()
1697 	struct loop_device *lo = disk->private_data;  in lo_release()  local
1708 	mutex_lock(&lo->lo_mutex);  in lo_release()
1709 	if (lo->lo_state == Lo_bound && (lo->lo_flags & LO_FLAGS_AUTOCLEAR))  in lo_release()
1710 		lo->lo_state = Lo_rundown;  in lo_release()
1712 	need_clear = (lo->lo_state == Lo_rundown);  in lo_release()
1713 	mutex_unlock(&lo->lo_mutex);  in lo_release()
1716 		__loop_clr_fd(lo);  in lo_release()
1721 	struct loop_device *lo = disk->private_data;  in lo_free_disk()  local
1723 	if (lo->workqueue)  in lo_free_disk()
1724 		destroy_workqueue(lo->workqueue);  in lo_free_disk()
1725 	loop_free_idle_workers(lo, true);  in lo_free_disk()
1726 	timer_shutdown_sync(&lo->timer);  in lo_free_disk()
1727 	mutex_destroy(&lo->lo_mutex);  in lo_free_disk()
1728 	kfree(lo);  in lo_free_disk()
1821 	struct loop_device *lo = rq->q->queuedata;  in loop_queue_rq()  local
1825 	if (lo->lo_state != Lo_bound)  in loop_queue_rq()
1835 		cmd->use_aio = lo->lo_flags & LO_FLAGS_DIRECT_IO;  in loop_queue_rq()
1854 	loop_queue_work(lo, cmd);  in loop_queue_rq()
1865 	struct loop_device *lo = rq->q->queuedata;  in loop_handle_cmd()  local
1869 	if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) {  in loop_handle_cmd()
1886 	ret = do_req_filebacked(lo, rq);  in loop_handle_cmd()
1908 			struct list_head *cmd_list, struct loop_device *lo)  in loop_process_work()  argument
1914 	spin_lock_irq(&lo->lo_work_lock);  in loop_process_work()
1919 		spin_unlock_irq(&lo->lo_work_lock);  in loop_process_work()
1924 		spin_lock_irq(&lo->lo_work_lock);  in loop_process_work()
1934 		list_add_tail(&worker->idle_list, &lo->idle_worker_list);  in loop_process_work()
1935 		loop_set_timer(lo);  in loop_process_work()
1937 	spin_unlock_irq(&lo->lo_work_lock);  in loop_process_work()
1945 	loop_process_work(worker, &worker->cmd_list, worker->lo);  in loop_workfn()
1950 	struct loop_device *lo =  in loop_rootcg_workfn()  local
1952 	loop_process_work(NULL, &lo->rootcg_cmd_list, lo);  in loop_rootcg_workfn()
1968 	struct loop_device *lo;  in loop_add()  local
1973 	lo = kzalloc(sizeof(*lo), GFP_KERNEL);  in loop_add()
1974 	if (!lo)  in loop_add()
1976 	lo->worker_tree = RB_ROOT;  in loop_add()
1977 	INIT_LIST_HEAD(&lo->idle_worker_list);  in loop_add()
1978 	timer_setup(&lo->timer, loop_free_idle_workers_timer, TIMER_DEFERRABLE);  in loop_add()
1979 	lo->lo_state = Lo_unbound;  in loop_add()
1987 		err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL);  in loop_add()
1991 		err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL);  in loop_add()
1998 	lo->tag_set.ops = &loop_mq_ops;  in loop_add()
1999 	lo->tag_set.nr_hw_queues = 1;  in loop_add()
2000 	lo->tag_set.queue_depth = hw_queue_depth;  in loop_add()
2001 	lo->tag_set.numa_node = NUMA_NO_NODE;  in loop_add()
2002 	lo->tag_set.cmd_size = sizeof(struct loop_cmd);  in loop_add()
2003 	lo->tag_set.flags = BLK_MQ_F_STACKING | BLK_MQ_F_NO_SCHED_BY_DEFAULT;  in loop_add()
2004 	lo->tag_set.driver_data = lo;  in loop_add()
2006 	err = blk_mq_alloc_tag_set(&lo->tag_set);  in loop_add()
2010 	disk = lo->lo_disk = blk_mq_alloc_disk(&lo->tag_set, &lim, lo);  in loop_add()
2015 	lo->lo_queue = lo->lo_disk->queue;  in loop_add()
2037 	mutex_init(&lo->lo_mutex);  in loop_add()
2038 	lo->lo_number		= i;  in loop_add()
2039 	spin_lock_init(&lo->lo_lock);  in loop_add()
2040 	spin_lock_init(&lo->lo_work_lock);  in loop_add()
2041 	INIT_WORK(&lo->rootcg_work, loop_rootcg_workfn);  in loop_add()
2042 	INIT_LIST_HEAD(&lo->rootcg_cmd_list);  in loop_add()
2047 	disk->private_data	= lo;  in loop_add()
2048 	disk->queue		= lo->lo_queue;  in loop_add()
2059 	lo->idr_visible = true;  in loop_add()
2067 	blk_mq_free_tag_set(&lo->tag_set);  in loop_add()
2073 	kfree(lo);  in loop_add()
2078 static void loop_remove(struct loop_device *lo)  in loop_remove()  argument
2081 	del_gendisk(lo->lo_disk);  in loop_remove()
2082 	blk_mq_free_tag_set(&lo->tag_set);  in loop_remove()
2085 	idr_remove(&loop_index_idr, lo->lo_number);  in loop_remove()
2088 	put_disk(lo->lo_disk);  in loop_remove()
2106 	struct loop_device *lo;  in loop_control_remove()  local
2118 	lo = idr_find(&loop_index_idr, idx);  in loop_control_remove()
2119 	if (!lo || !lo->idr_visible)  in loop_control_remove()
2122 		lo->idr_visible = false;  in loop_control_remove()
2128 	ret = mutex_lock_killable(&lo->lo_mutex);  in loop_control_remove()
2131 	if (lo->lo_state != Lo_unbound || disk_openers(lo->lo_disk) > 0) {  in loop_control_remove()
2132 		mutex_unlock(&lo->lo_mutex);  in loop_control_remove()
2137 	lo->lo_state = Lo_deleting;  in loop_control_remove()
2138 	mutex_unlock(&lo->lo_mutex);  in loop_control_remove()
2140 	loop_remove(lo);  in loop_control_remove()
2146 	lo->idr_visible = true;  in loop_control_remove()
2153 	struct loop_device *lo;  in loop_control_get_free()  local
2159 	idr_for_each_entry(&loop_index_idr, lo, id) {  in loop_control_get_free()
2161 		if (lo->idr_visible && data_race(lo->lo_state) == Lo_unbound)  in loop_control_get_free()
2258 	struct loop_device *lo;  in loop_exit()  local
2270 	idr_for_each_entry(&loop_index_idr, lo, id)  in loop_exit()
2271 		loop_remove(lo);  in loop_exit()