Lines Matching refs:lo
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()
330 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, in lo_rw_aio() argument
338 struct file *file = lo->lo_backing_file; in lo_rw_aio()
405 static int do_req_filebacked(struct loop_device *lo, struct request *rq) in do_req_filebacked() argument
408 loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; in do_req_filebacked()
412 return lo_req_flush(lo, rq); in do_req_filebacked()
418 return lo_fallocate(lo, rq, pos, in do_req_filebacked()
423 return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE); in do_req_filebacked()
425 return lo_rw_aio(lo, cmd, pos, ITER_SOURCE); in do_req_filebacked()
427 return lo_rw_aio(lo, cmd, pos, ITER_DEST); in do_req_filebacked()
434 static void loop_reread_partitions(struct loop_device *lo) in loop_reread_partitions() argument
438 mutex_lock(&lo->lo_disk->open_mutex); in loop_reread_partitions()
439 rc = bdev_disk_changed(lo->lo_disk, false); in loop_reread_partitions()
440 mutex_unlock(&lo->lo_disk->open_mutex); in loop_reread_partitions()
443 __func__, lo->lo_number, lo->lo_file_name, rc); in loop_reread_partitions()
446 static unsigned int loop_query_min_dio_size(struct loop_device *lo) in loop_query_min_dio_size() argument
448 struct file *file = lo->lo_backing_file; in loop_query_min_dio_size()
500 static void loop_assign_backing_file(struct loop_device *lo, struct file *file) in loop_assign_backing_file() argument
502 lo->lo_backing_file = file; in loop_assign_backing_file()
503 lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping); in loop_assign_backing_file()
505 lo->old_gfp_mask & ~(__GFP_IO | __GFP_FS)); in loop_assign_backing_file()
506 if (lo->lo_backing_file->f_flags & O_DIRECT) in loop_assign_backing_file()
507 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in loop_assign_backing_file()
508 lo->lo_min_dio_size = loop_query_min_dio_size(lo); in loop_assign_backing_file()
530 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev, in loop_change_fd() argument
548 dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1); in loop_change_fd()
551 error = loop_global_lock_killable(lo, is_loop); in loop_change_fd()
555 if (lo->lo_state != Lo_bound) in loop_change_fd()
560 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_change_fd()
567 old_file = lo->lo_backing_file; in loop_change_fd()
572 if (get_loop_size(lo, file) != get_loop_size(lo, old_file)) in loop_change_fd()
583 disk_force_media_change(lo->lo_disk); in loop_change_fd()
584 memflags = blk_mq_freeze_queue(lo->lo_queue); in loop_change_fd()
585 mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask); in loop_change_fd()
586 loop_assign_backing_file(lo, file); in loop_change_fd()
587 loop_update_dio(lo); in loop_change_fd()
588 blk_mq_unfreeze_queue(lo->lo_queue, memflags); in loop_change_fd()
589 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_change_fd()
590 loop_global_unlock(lo, is_loop); in loop_change_fd()
606 dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0); in loop_change_fd()
608 loop_reread_partitions(lo); in loop_change_fd()
612 kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE); in loop_change_fd()
616 loop_global_unlock(lo, is_loop); in loop_change_fd()
619 dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0); in loop_change_fd()
629 struct loop_device *lo = disk->private_data; in loop_attr_show() local
631 return callback(lo, page); in loop_attr_show()
644 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) in loop_attr_backing_file_show() argument
649 spin_lock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
650 if (lo->lo_backing_file) in loop_attr_backing_file_show()
651 p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1); in loop_attr_backing_file_show()
652 spin_unlock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
666 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf) in loop_attr_offset_show() argument
668 return sysfs_emit(buf, "%llu\n", (unsigned long long)lo->lo_offset); in loop_attr_offset_show()
671 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf) in loop_attr_sizelimit_show() argument
673 return sysfs_emit(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit); in loop_attr_sizelimit_show()
676 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf) in loop_attr_autoclear_show() argument
678 int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR); in loop_attr_autoclear_show()
683 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf) in loop_attr_partscan_show() argument
685 int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN); in loop_attr_partscan_show()
690 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf) in loop_attr_dio_show() argument
692 int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO); in loop_attr_dio_show()
719 static void loop_sysfs_init(struct loop_device *lo) in loop_sysfs_init() argument
721 lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_init()
725 static void loop_sysfs_exit(struct loop_device *lo) in loop_sysfs_exit() argument
727 if (lo->sysfs_inited) in loop_sysfs_exit()
728 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_exit()
732 static void loop_get_discard_config(struct loop_device *lo, in loop_get_discard_config() argument
735 struct file *file = lo->lo_backing_file; in loop_get_discard_config()
767 struct loop_device *lo; member
786 static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd) in loop_queue_work() argument
793 spin_lock_irq(&lo->lo_work_lock); in loop_queue_work()
798 node = &lo->worker_tree.rb_node; in loop_queue_work()
833 worker->lo = lo; in loop_queue_work()
835 rb_insert_color(&worker->rb_node, &lo->worker_tree); in loop_queue_work()
848 work = &lo->rootcg_work; in loop_queue_work()
849 cmd_list = &lo->rootcg_cmd_list; in loop_queue_work()
852 queue_work(lo->workqueue, work); in loop_queue_work()
853 spin_unlock_irq(&lo->lo_work_lock); in loop_queue_work()
856 static void loop_set_timer(struct loop_device *lo) in loop_set_timer() argument
858 timer_reduce(&lo->timer, jiffies + LOOP_IDLE_WORKER_TIMEOUT); in loop_set_timer()
861 static void loop_free_idle_workers(struct loop_device *lo, bool delete_all) in loop_free_idle_workers() argument
865 spin_lock_irq(&lo->lo_work_lock); in loop_free_idle_workers()
866 list_for_each_entry_safe(worker, pos, &lo->idle_worker_list, in loop_free_idle_workers()
873 rb_erase(&worker->rb_node, &lo->worker_tree); in loop_free_idle_workers()
877 if (!list_empty(&lo->idle_worker_list)) in loop_free_idle_workers()
878 loop_set_timer(lo); in loop_free_idle_workers()
879 spin_unlock_irq(&lo->lo_work_lock); in loop_free_idle_workers()
884 struct loop_device *lo = container_of(timer, struct loop_device, timer); in loop_free_idle_workers_timer() local
886 return loop_free_idle_workers(lo, false); in loop_free_idle_workers_timer()
898 loop_set_status_from_info(struct loop_device *lo, in loop_set_status_from_info() argument
921 lo->lo_offset = info->lo_offset; in loop_set_status_from_info()
922 lo->lo_sizelimit = info->lo_sizelimit; in loop_set_status_from_info()
924 memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); in loop_set_status_from_info()
925 lo->lo_file_name[LO_NAME_SIZE-1] = 0; in loop_set_status_from_info()
929 static unsigned int loop_default_blocksize(struct loop_device *lo) in loop_default_blocksize() argument
932 if (lo->lo_flags & LO_FLAGS_DIRECT_IO) in loop_default_blocksize()
933 return lo->lo_min_dio_size; in loop_default_blocksize()
937 static void loop_update_limits(struct loop_device *lo, struct queue_limits *lim, in loop_update_limits() argument
940 struct file *file = lo->lo_backing_file; in loop_update_limits()
951 bsize = loop_default_blocksize(lo); in loop_update_limits()
953 loop_get_discard_config(lo, &granularity, &max_discard_sectors); in loop_update_limits()
959 if (file->f_op->fsync && !(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_update_limits()
971 static int loop_configure(struct loop_device *lo, blk_mode_t mode, in loop_configure() argument
1004 error = loop_global_lock_killable(lo, is_loop); in loop_configure()
1009 if (lo->lo_state != Lo_unbound) in loop_configure()
1021 error = loop_set_status_from_info(lo, &config->info); in loop_configure()
1024 lo->lo_flags = config->info.lo_flags; in loop_configure()
1028 lo->lo_flags |= LO_FLAGS_READ_ONLY; in loop_configure()
1030 if (!lo->workqueue) { in loop_configure()
1031 lo->workqueue = alloc_workqueue("loop%d", in loop_configure()
1033 0, lo->lo_number); in loop_configure()
1034 if (!lo->workqueue) { in loop_configure()
1041 dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1); in loop_configure()
1043 disk_force_media_change(lo->lo_disk); in loop_configure()
1044 set_disk_ro(lo->lo_disk, (lo->lo_flags & LO_FLAGS_READ_ONLY) != 0); in loop_configure()
1046 lo->lo_device = bdev; in loop_configure()
1047 loop_assign_backing_file(lo, file); in loop_configure()
1049 lim = queue_limits_start_update(lo->lo_queue); in loop_configure()
1050 loop_update_limits(lo, &lim, config->block_size); in loop_configure()
1052 error = queue_limits_commit_update(lo->lo_queue, &lim); in loop_configure()
1063 loop_update_dio(lo); in loop_configure()
1064 loop_sysfs_init(lo); in loop_configure()
1066 size = get_loop_size(lo, file); in loop_configure()
1067 loop_set_size(lo, size); in loop_configure()
1072 lo->lo_state = Lo_bound; in loop_configure()
1074 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_configure()
1075 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_configure()
1077 clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state); in loop_configure()
1079 dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 0); in loop_configure()
1080 kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE); in loop_configure()
1082 loop_global_unlock(lo, is_loop); in loop_configure()
1084 loop_reread_partitions(lo); in loop_configure()
1092 loop_global_unlock(lo, is_loop); in loop_configure()
1103 static void __loop_clr_fd(struct loop_device *lo) in __loop_clr_fd() argument
1107 gfp_t gfp = lo->old_gfp_mask; in __loop_clr_fd()
1109 spin_lock_irq(&lo->lo_lock); in __loop_clr_fd()
1110 filp = lo->lo_backing_file; in __loop_clr_fd()
1111 lo->lo_backing_file = NULL; in __loop_clr_fd()
1112 spin_unlock_irq(&lo->lo_lock); in __loop_clr_fd()
1114 lo->lo_device = NULL; in __loop_clr_fd()
1115 lo->lo_offset = 0; in __loop_clr_fd()
1116 lo->lo_sizelimit = 0; in __loop_clr_fd()
1117 memset(lo->lo_file_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1125 lim = queue_limits_start_update(lo->lo_queue); in __loop_clr_fd()
1129 queue_limits_commit_update(lo->lo_queue, &lim); in __loop_clr_fd()
1131 invalidate_disk(lo->lo_disk); in __loop_clr_fd()
1132 loop_sysfs_exit(lo); in __loop_clr_fd()
1134 kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE); in __loop_clr_fd()
1139 disk_force_media_change(lo->lo_disk); in __loop_clr_fd()
1141 if (lo->lo_flags & LO_FLAGS_PARTSCAN) { in __loop_clr_fd()
1152 err = bdev_disk_changed(lo->lo_disk, false); in __loop_clr_fd()
1155 __func__, lo->lo_number, err); in __loop_clr_fd()
1165 lo->lo_flags = 0; in __loop_clr_fd()
1167 set_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state); in __loop_clr_fd()
1168 mutex_lock(&lo->lo_mutex); in __loop_clr_fd()
1169 lo->lo_state = Lo_unbound; in __loop_clr_fd()
1170 mutex_unlock(&lo->lo_mutex); in __loop_clr_fd()
1180 static int loop_clr_fd(struct loop_device *lo) in loop_clr_fd() argument
1193 err = loop_global_lock_killable(lo, true); in loop_clr_fd()
1196 if (lo->lo_state != Lo_bound) { in loop_clr_fd()
1197 loop_global_unlock(lo, true); in loop_clr_fd()
1206 lo->lo_flags |= LO_FLAGS_AUTOCLEAR; in loop_clr_fd()
1207 if (disk_openers(lo->lo_disk) == 1) in loop_clr_fd()
1208 lo->lo_state = Lo_rundown; in loop_clr_fd()
1209 loop_global_unlock(lo, true); in loop_clr_fd()
1215 loop_set_status(struct loop_device *lo, const struct loop_info64 *info) in loop_set_status() argument
1222 err = mutex_lock_killable(&lo->lo_mutex); in loop_set_status()
1225 if (lo->lo_state != Lo_bound) { in loop_set_status()
1230 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1231 lo->lo_sizelimit != info->lo_sizelimit) { in loop_set_status()
1233 sync_blockdev(lo->lo_device); in loop_set_status()
1234 invalidate_bdev(lo->lo_device); in loop_set_status()
1238 memflags = blk_mq_freeze_queue(lo->lo_queue); in loop_set_status()
1240 err = loop_set_status_from_info(lo, info); in loop_set_status()
1244 partscan = !(lo->lo_flags & LO_FLAGS_PARTSCAN) && in loop_set_status()
1247 lo->lo_flags &= ~LOOP_SET_STATUS_CLEARABLE_FLAGS; in loop_set_status()
1248 lo->lo_flags |= (info->lo_flags & LOOP_SET_STATUS_SETTABLE_FLAGS); in loop_set_status()
1251 loop_update_dio(lo); in loop_set_status()
1254 blk_mq_unfreeze_queue(lo->lo_queue, memflags); in loop_set_status()
1256 clear_bit(GD_SUPPRESS_PART_SCAN, &lo->lo_disk->state); in loop_set_status()
1258 loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit, in loop_set_status()
1259 lo->lo_backing_file); in loop_set_status()
1260 loop_set_size(lo, new_size); in loop_set_status()
1263 mutex_unlock(&lo->lo_mutex); in loop_set_status()
1265 loop_reread_partitions(lo); in loop_set_status()
1271 loop_get_status(struct loop_device *lo, struct loop_info64 *info) in loop_get_status() argument
1277 ret = mutex_lock_killable(&lo->lo_mutex); in loop_get_status()
1280 if (lo->lo_state != Lo_bound) { in loop_get_status()
1281 mutex_unlock(&lo->lo_mutex); in loop_get_status()
1286 info->lo_number = lo->lo_number; in loop_get_status()
1287 info->lo_offset = lo->lo_offset; in loop_get_status()
1288 info->lo_sizelimit = lo->lo_sizelimit; in loop_get_status()
1289 info->lo_flags = lo->lo_flags; in loop_get_status()
1290 memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE); in loop_get_status()
1293 path = lo->lo_backing_file->f_path; in loop_get_status()
1295 mutex_unlock(&lo->lo_mutex); in loop_get_status()
1343 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg) in loop_set_status_old() argument
1351 return loop_set_status(lo, &info64); in loop_set_status_old()
1355 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg) in loop_set_status64() argument
1361 return loop_set_status(lo, &info64); in loop_set_status64()
1365 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) { in loop_get_status_old() argument
1372 err = loop_get_status(lo, &info64); in loop_get_status_old()
1382 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { in loop_get_status64() argument
1388 err = loop_get_status(lo, &info64); in loop_get_status64()
1395 static int loop_set_capacity(struct loop_device *lo) in loop_set_capacity() argument
1399 if (unlikely(lo->lo_state != Lo_bound)) in loop_set_capacity()
1402 size = get_loop_size(lo, lo->lo_backing_file); in loop_set_capacity()
1403 loop_set_size(lo, size); in loop_set_capacity()
1408 static int loop_set_dio(struct loop_device *lo, unsigned long arg) in loop_set_dio() argument
1413 if (lo->lo_state != Lo_bound) in loop_set_dio()
1415 if (use_dio == !!(lo->lo_flags & LO_FLAGS_DIRECT_IO)) in loop_set_dio()
1419 if (!lo_can_use_dio(lo)) in loop_set_dio()
1422 vfs_fsync(lo->lo_backing_file, 0); in loop_set_dio()
1425 memflags = blk_mq_freeze_queue(lo->lo_queue); in loop_set_dio()
1427 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in loop_set_dio()
1429 lo->lo_flags &= ~LO_FLAGS_DIRECT_IO; in loop_set_dio()
1430 blk_mq_unfreeze_queue(lo->lo_queue, memflags); in loop_set_dio()
1434 static int loop_set_block_size(struct loop_device *lo, blk_mode_t mode, in loop_set_block_size() argument
1451 err = mutex_lock_killable(&lo->lo_mutex); in loop_set_block_size()
1455 if (lo->lo_state != Lo_bound) { in loop_set_block_size()
1460 if (lo->lo_queue->limits.logical_block_size == arg) in loop_set_block_size()
1463 sync_blockdev(lo->lo_device); in loop_set_block_size()
1464 invalidate_bdev(lo->lo_device); in loop_set_block_size()
1466 lim = queue_limits_start_update(lo->lo_queue); in loop_set_block_size()
1467 loop_update_limits(lo, &lim, arg); in loop_set_block_size()
1469 memflags = blk_mq_freeze_queue(lo->lo_queue); in loop_set_block_size()
1470 err = queue_limits_commit_update(lo->lo_queue, &lim); in loop_set_block_size()
1471 loop_update_dio(lo); in loop_set_block_size()
1472 blk_mq_unfreeze_queue(lo->lo_queue, memflags); in loop_set_block_size()
1475 mutex_unlock(&lo->lo_mutex); in loop_set_block_size()
1482 static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd, in lo_simple_ioctl() argument
1487 err = mutex_lock_killable(&lo->lo_mutex); in lo_simple_ioctl()
1492 err = loop_set_capacity(lo); in lo_simple_ioctl()
1495 err = loop_set_dio(lo, arg); in lo_simple_ioctl()
1500 mutex_unlock(&lo->lo_mutex); in lo_simple_ioctl()
1507 struct loop_device *lo = bdev->bd_disk->private_data; in lo_ioctl() local
1523 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1531 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1534 return loop_change_fd(lo, bdev, arg); in lo_ioctl()
1536 return loop_clr_fd(lo); in lo_ioctl()
1540 err = loop_set_status_old(lo, argp); in lo_ioctl()
1543 return loop_get_status_old(lo, argp); in lo_ioctl()
1547 err = loop_set_status64(lo, argp); in lo_ioctl()
1550 return loop_get_status64(lo, argp); in lo_ioctl()
1554 return loop_set_block_size(lo, mode, bdev, arg); in lo_ioctl()
1561 err = lo_simple_ioctl(lo, cmd, arg); in lo_ioctl()
1641 loop_set_status_compat(struct loop_device *lo, in loop_set_status_compat() argument
1650 return loop_set_status(lo, &info64); in loop_set_status_compat()
1654 loop_get_status_compat(struct loop_device *lo, in loop_get_status_compat() argument
1662 err = loop_get_status(lo, &info64); in loop_get_status_compat()
1671 struct loop_device *lo = bdev->bd_disk->private_data; in lo_compat_ioctl() local
1676 err = loop_set_status_compat(lo, in lo_compat_ioctl()
1680 err = loop_get_status_compat(lo, in lo_compat_ioctl()
1706 struct loop_device *lo = disk->private_data; in lo_open() local
1709 err = mutex_lock_killable(&lo->lo_mutex); in lo_open()
1713 if (lo->lo_state == Lo_deleting || lo->lo_state == Lo_rundown) in lo_open()
1715 mutex_unlock(&lo->lo_mutex); in lo_open()
1721 struct loop_device *lo = disk->private_data; in lo_release() local
1732 mutex_lock(&lo->lo_mutex); in lo_release()
1733 if (lo->lo_state == Lo_bound && (lo->lo_flags & LO_FLAGS_AUTOCLEAR)) in lo_release()
1734 lo->lo_state = Lo_rundown; in lo_release()
1736 need_clear = (lo->lo_state == Lo_rundown); in lo_release()
1737 mutex_unlock(&lo->lo_mutex); in lo_release()
1740 __loop_clr_fd(lo); in lo_release()
1745 struct loop_device *lo = disk->private_data; in lo_free_disk() local
1747 if (lo->workqueue) in lo_free_disk()
1748 destroy_workqueue(lo->workqueue); in lo_free_disk()
1749 loop_free_idle_workers(lo, true); in lo_free_disk()
1750 timer_shutdown_sync(&lo->timer); in lo_free_disk()
1751 mutex_destroy(&lo->lo_mutex); in lo_free_disk()
1752 kfree(lo); in lo_free_disk()
1845 struct loop_device *lo = rq->q->queuedata; in loop_queue_rq() local
1849 if (lo->lo_state != Lo_bound) in loop_queue_rq()
1859 cmd->use_aio = lo->lo_flags & LO_FLAGS_DIRECT_IO; in loop_queue_rq()
1878 loop_queue_work(lo, cmd); in loop_queue_rq()
1889 struct loop_device *lo = rq->q->queuedata; in loop_handle_cmd() local
1893 if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) { in loop_handle_cmd()
1910 ret = do_req_filebacked(lo, rq); in loop_handle_cmd()
1932 struct list_head *cmd_list, struct loop_device *lo) in loop_process_work() argument
1938 spin_lock_irq(&lo->lo_work_lock); in loop_process_work()
1943 spin_unlock_irq(&lo->lo_work_lock); in loop_process_work()
1948 spin_lock_irq(&lo->lo_work_lock); in loop_process_work()
1958 list_add_tail(&worker->idle_list, &lo->idle_worker_list); in loop_process_work()
1959 loop_set_timer(lo); in loop_process_work()
1961 spin_unlock_irq(&lo->lo_work_lock); in loop_process_work()
1969 loop_process_work(worker, &worker->cmd_list, worker->lo); in loop_workfn()
1974 struct loop_device *lo = in loop_rootcg_workfn() local
1976 loop_process_work(NULL, &lo->rootcg_cmd_list, lo); in loop_rootcg_workfn()
1992 struct loop_device *lo; in loop_add() local
1997 lo = kzalloc(sizeof(*lo), GFP_KERNEL); in loop_add()
1998 if (!lo) in loop_add()
2000 lo->worker_tree = RB_ROOT; in loop_add()
2001 INIT_LIST_HEAD(&lo->idle_worker_list); in loop_add()
2002 timer_setup(&lo->timer, loop_free_idle_workers_timer, TIMER_DEFERRABLE); in loop_add()
2003 lo->lo_state = Lo_unbound; in loop_add()
2011 err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL); in loop_add()
2015 err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL); in loop_add()
2022 lo->tag_set.ops = &loop_mq_ops; in loop_add()
2023 lo->tag_set.nr_hw_queues = 1; in loop_add()
2024 lo->tag_set.queue_depth = hw_queue_depth; in loop_add()
2025 lo->tag_set.numa_node = NUMA_NO_NODE; in loop_add()
2026 lo->tag_set.cmd_size = sizeof(struct loop_cmd); in loop_add()
2027 lo->tag_set.flags = BLK_MQ_F_STACKING | BLK_MQ_F_NO_SCHED_BY_DEFAULT; in loop_add()
2028 lo->tag_set.driver_data = lo; in loop_add()
2030 err = blk_mq_alloc_tag_set(&lo->tag_set); in loop_add()
2034 disk = lo->lo_disk = blk_mq_alloc_disk(&lo->tag_set, &lim, lo); in loop_add()
2039 lo->lo_queue = lo->lo_disk->queue; in loop_add()
2061 mutex_init(&lo->lo_mutex); in loop_add()
2062 lo->lo_number = i; in loop_add()
2063 spin_lock_init(&lo->lo_lock); in loop_add()
2064 spin_lock_init(&lo->lo_work_lock); in loop_add()
2065 INIT_WORK(&lo->rootcg_work, loop_rootcg_workfn); in loop_add()
2066 INIT_LIST_HEAD(&lo->rootcg_cmd_list); in loop_add()
2071 disk->private_data = lo; in loop_add()
2072 disk->queue = lo->lo_queue; in loop_add()
2083 lo->idr_visible = true; in loop_add()
2091 blk_mq_free_tag_set(&lo->tag_set); in loop_add()
2097 kfree(lo); in loop_add()
2102 static void loop_remove(struct loop_device *lo) in loop_remove() argument
2105 del_gendisk(lo->lo_disk); in loop_remove()
2106 blk_mq_free_tag_set(&lo->tag_set); in loop_remove()
2109 idr_remove(&loop_index_idr, lo->lo_number); in loop_remove()
2112 put_disk(lo->lo_disk); in loop_remove()
2130 struct loop_device *lo; in loop_control_remove() local
2142 lo = idr_find(&loop_index_idr, idx); in loop_control_remove()
2143 if (!lo || !lo->idr_visible) in loop_control_remove()
2146 lo->idr_visible = false; in loop_control_remove()
2152 ret = mutex_lock_killable(&lo->lo_mutex); in loop_control_remove()
2155 if (lo->lo_state != Lo_unbound || disk_openers(lo->lo_disk) > 0) { in loop_control_remove()
2156 mutex_unlock(&lo->lo_mutex); in loop_control_remove()
2161 lo->lo_state = Lo_deleting; in loop_control_remove()
2162 mutex_unlock(&lo->lo_mutex); in loop_control_remove()
2164 loop_remove(lo); in loop_control_remove()
2170 lo->idr_visible = true; in loop_control_remove()
2177 struct loop_device *lo; in loop_control_get_free() local
2183 idr_for_each_entry(&loop_index_idr, lo, id) { in loop_control_get_free()
2185 if (lo->idr_visible && data_race(lo->lo_state) == Lo_unbound) in loop_control_get_free()
2282 struct loop_device *lo; in loop_exit() local
2294 idr_for_each_entry(&loop_index_idr, lo, id) in loop_exit()
2295 loop_remove(lo); in loop_exit()