Lines Matching full:lo
96 * @lo: struct loop_device
97 * @global: true if @lo is about to bind another "struct loop_device", false otherwise
105 static int loop_global_lock_killable(struct loop_device *lo, bool global) in loop_global_lock_killable() argument
114 err = mutex_lock_killable(&lo->lo_mutex); in loop_global_lock_killable()
123 * @lo: struct loop_device
124 * @global: true if @lo was about to bind another "struct loop_device", false otherwise
126 static void loop_global_unlock(struct loop_device *lo, bool global) in loop_global_unlock() argument
128 mutex_unlock(&lo->lo_mutex); in loop_global_unlock()
136 static int transfer_xor(struct loop_device *lo, int cmd, in transfer_xor() argument
154 key = lo->lo_encrypt_key; in transfer_xor()
155 keysize = lo->lo_encrypt_key_size; in transfer_xor()
165 static int xor_init(struct loop_device *lo, const struct loop_info64 *info) in xor_init() argument
209 static loff_t get_loop_size(struct loop_device *lo, struct file *file) in get_loop_size() argument
211 return get_size(lo->lo_offset, lo->lo_sizelimit, file); in get_loop_size()
214 static void __loop_update_dio(struct loop_device *lo, bool dio) in __loop_update_dio() argument
216 struct file *file = lo->lo_backing_file; in __loop_update_dio()
239 if (queue_logical_block_size(lo->lo_queue) >= sb_bsize && in __loop_update_dio()
240 !(lo->lo_offset & dio_align) && in __loop_update_dio()
242 !lo->transfer) in __loop_update_dio()
250 if (lo->use_dio == use_dio) in __loop_update_dio()
261 if (lo->lo_state == Lo_bound) in __loop_update_dio()
262 blk_mq_freeze_queue(lo->lo_queue); in __loop_update_dio()
263 lo->use_dio = use_dio; in __loop_update_dio()
265 blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
266 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in __loop_update_dio()
268 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
269 lo->lo_flags &= ~LO_FLAGS_DIRECT_IO; in __loop_update_dio()
271 if (lo->lo_state == Lo_bound) in __loop_update_dio()
272 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_update_dio()
290 * @lo: struct loop_device to set the size for
296 static void loop_set_size(struct loop_device *lo, loff_t size) in loop_set_size() argument
298 if (!set_capacity_and_notify(lo->lo_disk, size)) in loop_set_size()
299 kobject_uevent(&disk_to_dev(lo->lo_disk)->kobj, KOBJ_CHANGE); in loop_set_size()
303 lo_do_transfer(struct loop_device *lo, int cmd, in lo_do_transfer() argument
310 ret = lo->transfer(lo, cmd, rpage, roffs, lpage, loffs, size, rblock); in lo_do_transfer()
342 static int lo_write_simple(struct loop_device *lo, struct request *rq, in lo_write_simple() argument
350 ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos); in lo_write_simple()
364 static int lo_write_transfer(struct loop_device *lo, struct request *rq, in lo_write_transfer() argument
377 ret = lo_do_transfer(lo, WRITE, page, 0, bvec.bv_page, in lo_write_transfer()
385 ret = lo_write_bvec(lo->lo_backing_file, &b, &pos); in lo_write_transfer()
394 static int lo_read_simple(struct loop_device *lo, struct request *rq, in lo_read_simple() argument
404 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_simple()
423 static int lo_read_transfer(struct loop_device *lo, struct request *rq, in lo_read_transfer() argument
445 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_transfer()
451 ret = lo_do_transfer(lo, READ, page, 0, bvec.bv_page, in lo_read_transfer()
473 static int lo_fallocate(struct loop_device *lo, struct request *rq, loff_t pos, in lo_fallocate() argument
482 struct file *file = lo->lo_backing_file; in lo_fallocate()
483 struct request_queue *q = lo->lo_queue; in lo_fallocate()
500 static int lo_req_flush(struct loop_device *lo, struct request *rq) in lo_req_flush() argument
502 struct file *file = lo->lo_backing_file; in lo_req_flush()
565 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, in lo_rw_aio() argument
573 struct file *file = lo->lo_backing_file; in lo_rw_aio()
634 static int do_req_filebacked(struct loop_device *lo, struct request *rq) in do_req_filebacked() argument
637 loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; in do_req_filebacked()
650 return lo_req_flush(lo, rq); in do_req_filebacked()
656 return lo_fallocate(lo, rq, pos, in do_req_filebacked()
661 return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE); in do_req_filebacked()
663 if (lo->transfer) in do_req_filebacked()
664 return lo_write_transfer(lo, rq, pos); in do_req_filebacked()
666 return lo_rw_aio(lo, cmd, pos, WRITE); in do_req_filebacked()
668 return lo_write_simple(lo, rq, pos); in do_req_filebacked()
670 if (lo->transfer) in do_req_filebacked()
671 return lo_read_transfer(lo, rq, pos); in do_req_filebacked()
673 return lo_rw_aio(lo, cmd, pos, READ); in do_req_filebacked()
675 return lo_read_simple(lo, rq, pos); in do_req_filebacked()
682 static inline void loop_update_dio(struct loop_device *lo) in loop_update_dio() argument
684 __loop_update_dio(lo, (lo->lo_backing_file->f_flags & O_DIRECT) | in loop_update_dio()
685 lo->use_dio); in loop_update_dio()
688 static void loop_reread_partitions(struct loop_device *lo) in loop_reread_partitions() argument
692 mutex_lock(&lo->lo_disk->open_mutex); in loop_reread_partitions()
693 rc = bdev_disk_changed(lo->lo_disk, false); in loop_reread_partitions()
694 mutex_unlock(&lo->lo_disk->open_mutex); in loop_reread_partitions()
697 __func__, lo->lo_number, lo->lo_file_name, rc); in loop_reread_partitions()
723 /* Order wrt setting lo->lo_backing_file in loop_configure(). */ in loop_validate_file()
740 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev, in loop_change_fd() argument
752 error = loop_global_lock_killable(lo, is_loop); in loop_change_fd()
756 if (lo->lo_state != Lo_bound) in loop_change_fd()
761 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_change_fd()
768 old_file = lo->lo_backing_file; in loop_change_fd()
773 if (get_loop_size(lo, file) != get_loop_size(lo, old_file)) in loop_change_fd()
777 disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE); in loop_change_fd()
778 blk_mq_freeze_queue(lo->lo_queue); in loop_change_fd()
779 mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask); in loop_change_fd()
780 lo->lo_backing_file = file; in loop_change_fd()
781 lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping); in loop_change_fd()
783 lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_change_fd()
784 loop_update_dio(lo); in loop_change_fd()
785 blk_mq_unfreeze_queue(lo->lo_queue); in loop_change_fd()
786 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_change_fd()
787 loop_global_unlock(lo, is_loop); in loop_change_fd()
804 loop_reread_partitions(lo); in loop_change_fd()
808 loop_global_unlock(lo, is_loop); in loop_change_fd()
820 struct loop_device *lo = disk->private_data; in loop_attr_show() local
822 return callback(lo, page); in loop_attr_show()
835 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) in loop_attr_backing_file_show() argument
840 spin_lock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
841 if (lo->lo_backing_file) in loop_attr_backing_file_show()
842 p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1); in loop_attr_backing_file_show()
843 spin_unlock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
857 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf) in loop_attr_offset_show() argument
859 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_offset); in loop_attr_offset_show()
862 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf) in loop_attr_sizelimit_show() argument
864 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit); in loop_attr_sizelimit_show()
867 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf) in loop_attr_autoclear_show() argument
869 int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR); in loop_attr_autoclear_show()
874 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf) in loop_attr_partscan_show() argument
876 int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN); in loop_attr_partscan_show()
881 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf) in loop_attr_dio_show() argument
883 int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO); in loop_attr_dio_show()
910 static void loop_sysfs_init(struct loop_device *lo) in loop_sysfs_init() argument
912 lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_init()
916 static void loop_sysfs_exit(struct loop_device *lo) in loop_sysfs_exit() argument
918 if (lo->sysfs_inited) in loop_sysfs_exit()
919 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_exit()
923 static void loop_config_discard(struct loop_device *lo) in loop_config_discard() argument
925 struct file *file = lo->lo_backing_file; in loop_config_discard()
927 struct request_queue *q = lo->lo_queue; in loop_config_discard()
937 if (S_ISBLK(inode->i_mode) && !lo->lo_encrypt_key_size) { in loop_config_discard()
950 } else if (!file->f_op->fallocate || lo->lo_encrypt_key_size) { in loop_config_discard()
978 struct loop_device *lo; member
999 static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd) in loop_queue_work() argument
1001 struct rb_node **node = &(lo->worker_tree.rb_node), *parent = NULL; in loop_queue_work()
1006 spin_lock_irq(&lo->lo_work_lock); in loop_queue_work()
1011 node = &lo->worker_tree.rb_node; in loop_queue_work()
1046 worker->lo = lo; in loop_queue_work()
1048 rb_insert_color(&worker->rb_node, &lo->worker_tree); in loop_queue_work()
1061 work = &lo->rootcg_work; in loop_queue_work()
1062 cmd_list = &lo->rootcg_cmd_list; in loop_queue_work()
1065 queue_work(lo->workqueue, work); in loop_queue_work()
1066 spin_unlock_irq(&lo->lo_work_lock); in loop_queue_work()
1069 static void loop_update_rotational(struct loop_device *lo) in loop_update_rotational() argument
1071 struct file *file = lo->lo_backing_file; in loop_update_rotational()
1074 struct request_queue *q = lo->lo_queue; in loop_update_rotational()
1088 loop_release_xfer(struct loop_device *lo) in loop_release_xfer() argument
1091 struct loop_func_table *xfer = lo->lo_encryption; in loop_release_xfer()
1095 err = xfer->release(lo); in loop_release_xfer()
1096 lo->transfer = NULL; in loop_release_xfer()
1097 lo->lo_encryption = NULL; in loop_release_xfer()
1104 loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer, in loop_init_xfer() argument
1115 err = xfer->init(lo, i); in loop_init_xfer()
1119 lo->lo_encryption = xfer; in loop_init_xfer()
1126 * @lo: struct loop_device to configure
1133 loop_set_status_from_info(struct loop_device *lo, in loop_set_status_from_info() argument
1143 err = loop_release_xfer(lo); in loop_set_status_from_info()
1158 err = loop_init_xfer(lo, xfer, info); in loop_set_status_from_info()
1162 lo->lo_offset = info->lo_offset; in loop_set_status_from_info()
1163 lo->lo_sizelimit = info->lo_sizelimit; in loop_set_status_from_info()
1164 memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); in loop_set_status_from_info()
1165 memcpy(lo->lo_crypt_name, info->lo_crypt_name, LO_NAME_SIZE); in loop_set_status_from_info()
1166 lo->lo_file_name[LO_NAME_SIZE-1] = 0; in loop_set_status_from_info()
1167 lo->lo_crypt_name[LO_NAME_SIZE-1] = 0; in loop_set_status_from_info()
1171 lo->transfer = xfer->transfer; in loop_set_status_from_info()
1172 lo->ioctl = xfer->ioctl; in loop_set_status_from_info()
1174 lo->lo_flags = info->lo_flags; in loop_set_status_from_info()
1176 lo->lo_encrypt_key_size = info->lo_encrypt_key_size; in loop_set_status_from_info()
1177 lo->lo_init[0] = info->lo_init[0]; in loop_set_status_from_info()
1178 lo->lo_init[1] = info->lo_init[1]; in loop_set_status_from_info()
1180 memcpy(lo->lo_encrypt_key, info->lo_encrypt_key, in loop_set_status_from_info()
1182 lo->lo_key_owner = uid; in loop_set_status_from_info()
1188 static int loop_configure(struct loop_device *lo, fmode_t mode, in loop_configure() argument
1218 error = loop_global_lock_killable(lo, is_loop); in loop_configure()
1223 if (lo->lo_state != Lo_unbound) in loop_configure()
1244 error = loop_set_status_from_info(lo, &config->info); in loop_configure()
1250 lo->lo_flags |= LO_FLAGS_READ_ONLY; in loop_configure()
1252 lo->workqueue = alloc_workqueue("loop%d", in loop_configure()
1255 lo->lo_number); in loop_configure()
1256 if (!lo->workqueue) { in loop_configure()
1261 disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE); in loop_configure()
1262 set_disk_ro(lo->lo_disk, (lo->lo_flags & LO_FLAGS_READ_ONLY) != 0); in loop_configure()
1264 INIT_WORK(&lo->rootcg_work, loop_rootcg_workfn); in loop_configure()
1265 INIT_LIST_HEAD(&lo->rootcg_cmd_list); in loop_configure()
1266 INIT_LIST_HEAD(&lo->idle_worker_list); in loop_configure()
1267 lo->worker_tree = RB_ROOT; in loop_configure()
1268 timer_setup(&lo->timer, loop_free_idle_workers, in loop_configure()
1270 lo->use_dio = lo->lo_flags & LO_FLAGS_DIRECT_IO; in loop_configure()
1271 lo->lo_device = bdev; in loop_configure()
1272 lo->lo_backing_file = file; in loop_configure()
1273 lo->old_gfp_mask = mapping_gfp_mask(mapping); in loop_configure()
1274 mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_configure()
1276 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync) in loop_configure()
1277 blk_queue_write_cache(lo->lo_queue, true, false); in loop_configure()
1281 else if ((lo->lo_backing_file->f_flags & O_DIRECT) && inode->i_sb->s_bdev) in loop_configure()
1287 blk_queue_logical_block_size(lo->lo_queue, bsize); in loop_configure()
1288 blk_queue_physical_block_size(lo->lo_queue, bsize); in loop_configure()
1289 blk_queue_io_min(lo->lo_queue, bsize); in loop_configure()
1291 loop_config_discard(lo); in loop_configure()
1292 loop_update_rotational(lo); in loop_configure()
1293 loop_update_dio(lo); in loop_configure()
1294 loop_sysfs_init(lo); in loop_configure()
1296 size = get_loop_size(lo, file); in loop_configure()
1297 loop_set_size(lo, size); in loop_configure()
1302 lo->lo_state = Lo_bound; in loop_configure()
1304 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_configure()
1305 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_configure()
1307 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_configure()
1309 loop_global_unlock(lo, is_loop); in loop_configure()
1311 loop_reread_partitions(lo); in loop_configure()
1317 loop_global_unlock(lo, is_loop); in loop_configure()
1328 static int __loop_clr_fd(struct loop_device *lo, bool release) in __loop_clr_fd() argument
1331 gfp_t gfp = lo->old_gfp_mask; in __loop_clr_fd()
1332 struct block_device *bdev = lo->lo_device; in __loop_clr_fd()
1350 mutex_lock(&lo->lo_mutex); in __loop_clr_fd()
1351 if (WARN_ON_ONCE(lo->lo_state != Lo_rundown)) { in __loop_clr_fd()
1356 filp = lo->lo_backing_file; in __loop_clr_fd()
1362 if (test_bit(QUEUE_FLAG_WC, &lo->lo_queue->queue_flags)) in __loop_clr_fd()
1363 blk_queue_write_cache(lo->lo_queue, false, false); in __loop_clr_fd()
1366 blk_mq_freeze_queue(lo->lo_queue); in __loop_clr_fd()
1368 destroy_workqueue(lo->workqueue); in __loop_clr_fd()
1369 spin_lock_irq(&lo->lo_work_lock); in __loop_clr_fd()
1370 list_for_each_entry_safe(worker, pos, &lo->idle_worker_list, in __loop_clr_fd()
1373 rb_erase(&worker->rb_node, &lo->worker_tree); in __loop_clr_fd()
1377 spin_unlock_irq(&lo->lo_work_lock); in __loop_clr_fd()
1378 del_timer_sync(&lo->timer); in __loop_clr_fd()
1380 spin_lock_irq(&lo->lo_lock); in __loop_clr_fd()
1381 lo->lo_backing_file = NULL; in __loop_clr_fd()
1382 spin_unlock_irq(&lo->lo_lock); in __loop_clr_fd()
1384 loop_release_xfer(lo); in __loop_clr_fd()
1385 lo->transfer = NULL; in __loop_clr_fd()
1386 lo->ioctl = NULL; in __loop_clr_fd()
1387 lo->lo_device = NULL; in __loop_clr_fd()
1388 lo->lo_encryption = NULL; in __loop_clr_fd()
1389 lo->lo_offset = 0; in __loop_clr_fd()
1390 lo->lo_sizelimit = 0; in __loop_clr_fd()
1391 lo->lo_encrypt_key_size = 0; in __loop_clr_fd()
1392 memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE); in __loop_clr_fd()
1393 memset(lo->lo_crypt_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1394 memset(lo->lo_file_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1395 blk_queue_logical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1396 blk_queue_physical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1397 blk_queue_io_min(lo->lo_queue, 512); in __loop_clr_fd()
1402 set_capacity(lo->lo_disk, 0); in __loop_clr_fd()
1403 loop_sysfs_exit(lo); in __loop_clr_fd()
1411 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_clr_fd()
1413 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN && bdev; in __loop_clr_fd()
1414 lo_number = lo->lo_number; in __loop_clr_fd()
1415 disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE); in __loop_clr_fd()
1417 mutex_unlock(&lo->lo_mutex); in __loop_clr_fd()
1428 mutex_lock(&lo->lo_disk->open_mutex); in __loop_clr_fd()
1429 err = bdev_disk_changed(lo->lo_disk, false); in __loop_clr_fd()
1431 mutex_unlock(&lo->lo_disk->open_mutex); in __loop_clr_fd()
1440 * lo->lo_state is set to Lo_unbound here after above partscan has in __loop_clr_fd()
1444 * lo->lo_backing_file is already cleared and Lo_rundown state in __loop_clr_fd()
1445 * protects us from all the other places trying to change the 'lo' in __loop_clr_fd()
1448 mutex_lock(&lo->lo_mutex); in __loop_clr_fd()
1449 lo->lo_flags = 0; in __loop_clr_fd()
1451 lo->lo_disk->flags |= GENHD_FL_NO_PART_SCAN; in __loop_clr_fd()
1452 lo->lo_state = Lo_unbound; in __loop_clr_fd()
1453 mutex_unlock(&lo->lo_mutex); in __loop_clr_fd()
1465 static int loop_clr_fd(struct loop_device *lo) in loop_clr_fd() argument
1469 err = mutex_lock_killable(&lo->lo_mutex); in loop_clr_fd()
1472 if (lo->lo_state != Lo_bound) { in loop_clr_fd()
1473 mutex_unlock(&lo->lo_mutex); in loop_clr_fd()
1486 if (atomic_read(&lo->lo_refcnt) > 1) { in loop_clr_fd()
1487 lo->lo_flags |= LO_FLAGS_AUTOCLEAR; in loop_clr_fd()
1488 mutex_unlock(&lo->lo_mutex); in loop_clr_fd()
1491 lo->lo_state = Lo_rundown; in loop_clr_fd()
1492 mutex_unlock(&lo->lo_mutex); in loop_clr_fd()
1494 return __loop_clr_fd(lo, false); in loop_clr_fd()
1498 loop_set_status(struct loop_device *lo, const struct loop_info64 *info) in loop_set_status() argument
1506 err = mutex_lock_killable(&lo->lo_mutex); in loop_set_status()
1509 if (lo->lo_encrypt_key_size && in loop_set_status()
1510 !uid_eq(lo->lo_key_owner, uid) && in loop_set_status()
1515 if (lo->lo_state != Lo_bound) { in loop_set_status()
1520 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1521 lo->lo_sizelimit != info->lo_sizelimit) { in loop_set_status()
1523 sync_blockdev(lo->lo_device); in loop_set_status()
1524 invalidate_bdev(lo->lo_device); in loop_set_status()
1528 blk_mq_freeze_queue(lo->lo_queue); in loop_set_status()
1530 if (size_changed && lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_status()
1534 __func__, lo->lo_number, lo->lo_file_name, in loop_set_status()
1535 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_status()
1539 prev_lo_flags = lo->lo_flags; in loop_set_status()
1541 err = loop_set_status_from_info(lo, info); in loop_set_status()
1546 lo->lo_flags &= LOOP_SET_STATUS_SETTABLE_FLAGS; in loop_set_status()
1548 lo->lo_flags |= prev_lo_flags & ~LOOP_SET_STATUS_SETTABLE_FLAGS; in loop_set_status()
1550 lo->lo_flags |= prev_lo_flags & ~LOOP_SET_STATUS_CLEARABLE_FLAGS; in loop_set_status()
1553 loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit, in loop_set_status()
1554 lo->lo_backing_file); in loop_set_status()
1555 loop_set_size(lo, new_size); in loop_set_status()
1558 loop_config_discard(lo); in loop_set_status()
1561 __loop_update_dio(lo, lo->use_dio); in loop_set_status()
1564 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_status()
1566 if (!err && (lo->lo_flags & LO_FLAGS_PARTSCAN) && in loop_set_status()
1568 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_set_status()
1572 mutex_unlock(&lo->lo_mutex); in loop_set_status()
1574 loop_reread_partitions(lo); in loop_set_status()
1580 loop_get_status(struct loop_device *lo, struct loop_info64 *info) in loop_get_status() argument
1586 ret = mutex_lock_killable(&lo->lo_mutex); in loop_get_status()
1589 if (lo->lo_state != Lo_bound) { in loop_get_status()
1590 mutex_unlock(&lo->lo_mutex); in loop_get_status()
1595 info->lo_number = lo->lo_number; in loop_get_status()
1596 info->lo_offset = lo->lo_offset; in loop_get_status()
1597 info->lo_sizelimit = lo->lo_sizelimit; in loop_get_status()
1598 info->lo_flags = lo->lo_flags; in loop_get_status()
1599 memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE); in loop_get_status()
1600 memcpy(info->lo_crypt_name, lo->lo_crypt_name, LO_NAME_SIZE); in loop_get_status()
1602 lo->lo_encryption ? lo->lo_encryption->number : 0; in loop_get_status()
1603 if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) { in loop_get_status()
1604 info->lo_encrypt_key_size = lo->lo_encrypt_key_size; in loop_get_status()
1605 memcpy(info->lo_encrypt_key, lo->lo_encrypt_key, in loop_get_status()
1606 lo->lo_encrypt_key_size); in loop_get_status()
1610 path = lo->lo_backing_file->f_path; in loop_get_status()
1612 mutex_unlock(&lo->lo_mutex); in loop_get_status()
1676 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg) in loop_set_status_old() argument
1684 return loop_set_status(lo, &info64); in loop_set_status_old()
1688 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg) in loop_set_status64() argument
1694 return loop_set_status(lo, &info64); in loop_set_status64()
1698 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) { in loop_get_status_old() argument
1705 err = loop_get_status(lo, &info64); in loop_get_status_old()
1715 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { in loop_get_status64() argument
1721 err = loop_get_status(lo, &info64); in loop_get_status64()
1728 static int loop_set_capacity(struct loop_device *lo) in loop_set_capacity() argument
1732 if (unlikely(lo->lo_state != Lo_bound)) in loop_set_capacity()
1735 size = get_loop_size(lo, lo->lo_backing_file); in loop_set_capacity()
1736 loop_set_size(lo, size); in loop_set_capacity()
1741 static int loop_set_dio(struct loop_device *lo, unsigned long arg) in loop_set_dio() argument
1744 if (lo->lo_state != Lo_bound) in loop_set_dio()
1747 __loop_update_dio(lo, !!arg); in loop_set_dio()
1748 if (lo->use_dio == !!arg) in loop_set_dio()
1755 static int loop_set_block_size(struct loop_device *lo, unsigned long arg) in loop_set_block_size() argument
1759 if (lo->lo_state != Lo_bound) in loop_set_block_size()
1766 if (lo->lo_queue->limits.logical_block_size == arg) in loop_set_block_size()
1769 sync_blockdev(lo->lo_device); in loop_set_block_size()
1770 invalidate_bdev(lo->lo_device); in loop_set_block_size()
1772 blk_mq_freeze_queue(lo->lo_queue); in loop_set_block_size()
1775 if (lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_block_size()
1778 __func__, lo->lo_number, lo->lo_file_name, in loop_set_block_size()
1779 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_block_size()
1783 blk_queue_logical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1784 blk_queue_physical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1785 blk_queue_io_min(lo->lo_queue, arg); in loop_set_block_size()
1786 loop_update_dio(lo); in loop_set_block_size()
1788 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_block_size()
1793 static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd, in lo_simple_ioctl() argument
1798 err = mutex_lock_killable(&lo->lo_mutex); in lo_simple_ioctl()
1803 err = loop_set_capacity(lo); in lo_simple_ioctl()
1806 err = loop_set_dio(lo, arg); in lo_simple_ioctl()
1809 err = loop_set_block_size(lo, arg); in lo_simple_ioctl()
1812 err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL; in lo_simple_ioctl()
1814 mutex_unlock(&lo->lo_mutex); in lo_simple_ioctl()
1821 struct loop_device *lo = bdev->bd_disk->private_data; in lo_ioctl() local
1837 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1845 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1848 return loop_change_fd(lo, bdev, arg); in lo_ioctl()
1850 return loop_clr_fd(lo); in lo_ioctl()
1854 err = loop_set_status_old(lo, argp); in lo_ioctl()
1858 return loop_get_status_old(lo, argp); in lo_ioctl()
1862 err = loop_set_status64(lo, argp); in lo_ioctl()
1866 return loop_get_status64(lo, argp); in lo_ioctl()
1874 err = lo_simple_ioctl(lo, cmd, arg); in lo_ioctl()
1972 loop_set_status_compat(struct loop_device *lo, in loop_set_status_compat() argument
1981 return loop_set_status(lo, &info64); in loop_set_status_compat()
1985 loop_get_status_compat(struct loop_device *lo, in loop_get_status_compat() argument
1993 err = loop_get_status(lo, &info64); in loop_get_status_compat()
2002 struct loop_device *lo = bdev->bd_disk->private_data; in lo_compat_ioctl() local
2007 err = loop_set_status_compat(lo, in lo_compat_ioctl()
2011 err = loop_get_status_compat(lo, in lo_compat_ioctl()
2037 struct loop_device *lo = bdev->bd_disk->private_data; in lo_open() local
2040 err = mutex_lock_killable(&lo->lo_mutex); in lo_open()
2043 if (lo->lo_state == Lo_deleting) in lo_open()
2046 atomic_inc(&lo->lo_refcnt); in lo_open()
2047 mutex_unlock(&lo->lo_mutex); in lo_open()
2053 struct loop_device *lo = disk->private_data; in lo_release() local
2055 mutex_lock(&lo->lo_mutex); in lo_release()
2056 if (atomic_dec_return(&lo->lo_refcnt)) in lo_release()
2059 if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) { in lo_release()
2060 if (lo->lo_state != Lo_bound) in lo_release()
2062 lo->lo_state = Lo_rundown; in lo_release()
2063 mutex_unlock(&lo->lo_mutex); in lo_release()
2068 __loop_clr_fd(lo, true); in lo_release()
2070 } else if (lo->lo_state == Lo_bound) { in lo_release()
2075 blk_mq_freeze_queue(lo->lo_queue); in lo_release()
2076 blk_mq_unfreeze_queue(lo->lo_queue); in lo_release()
2080 mutex_unlock(&lo->lo_mutex); in lo_release()
2146 struct loop_device *lo = rq->q->queuedata; in loop_queue_rq() local
2150 if (lo->lo_state != Lo_bound) in loop_queue_rq()
2160 cmd->use_aio = lo->use_dio; in loop_queue_rq()
2177 loop_queue_work(lo, cmd); in loop_queue_rq()
2186 struct loop_device *lo = rq->q->queuedata; in loop_handle_cmd() local
2190 if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) { in loop_handle_cmd()
2201 ret = do_req_filebacked(lo, rq); in loop_handle_cmd()
2222 static void loop_set_timer(struct loop_device *lo) in loop_set_timer() argument
2224 timer_reduce(&lo->timer, jiffies + LOOP_IDLE_WORKER_TIMEOUT); in loop_set_timer()
2228 struct list_head *cmd_list, struct loop_device *lo) in loop_process_work() argument
2234 spin_lock_irq(&lo->lo_work_lock); in loop_process_work()
2239 spin_unlock_irq(&lo->lo_work_lock); in loop_process_work()
2244 spin_lock_irq(&lo->lo_work_lock); in loop_process_work()
2254 list_add_tail(&worker->idle_list, &lo->idle_worker_list); in loop_process_work()
2255 loop_set_timer(lo); in loop_process_work()
2257 spin_unlock_irq(&lo->lo_work_lock); in loop_process_work()
2265 loop_process_work(worker, &worker->cmd_list, worker->lo); in loop_workfn()
2270 struct loop_device *lo = in loop_rootcg_workfn() local
2272 loop_process_work(NULL, &lo->rootcg_cmd_list, lo); in loop_rootcg_workfn()
2277 struct loop_device *lo = container_of(timer, struct loop_device, timer); in loop_free_idle_workers() local
2280 spin_lock_irq(&lo->lo_work_lock); in loop_free_idle_workers()
2281 list_for_each_entry_safe(worker, pos, &lo->idle_worker_list, in loop_free_idle_workers()
2287 rb_erase(&worker->rb_node, &lo->worker_tree); in loop_free_idle_workers()
2291 if (!list_empty(&lo->idle_worker_list)) in loop_free_idle_workers()
2292 loop_set_timer(lo); in loop_free_idle_workers()
2293 spin_unlock_irq(&lo->lo_work_lock); in loop_free_idle_workers()
2303 struct loop_device *lo; in loop_add() local
2308 lo = kzalloc(sizeof(*lo), GFP_KERNEL); in loop_add()
2309 if (!lo) in loop_add()
2311 lo->lo_state = Lo_unbound; in loop_add()
2319 err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL); in loop_add()
2323 err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL); in loop_add()
2331 lo->tag_set.ops = &loop_mq_ops; in loop_add()
2332 lo->tag_set.nr_hw_queues = 1; in loop_add()
2333 lo->tag_set.queue_depth = 128; in loop_add()
2334 lo->tag_set.numa_node = NUMA_NO_NODE; in loop_add()
2335 lo->tag_set.cmd_size = sizeof(struct loop_cmd); in loop_add()
2336 lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING | in loop_add()
2338 lo->tag_set.driver_data = lo; in loop_add()
2340 err = blk_mq_alloc_tag_set(&lo->tag_set); in loop_add()
2344 disk = lo->lo_disk = blk_mq_alloc_disk(&lo->tag_set, lo); in loop_add()
2349 lo->lo_queue = lo->lo_disk->queue; in loop_add()
2351 blk_queue_max_hw_sectors(lo->lo_queue, BLK_DEF_MAX_SECTORS); in loop_add()
2359 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in loop_add()
2382 atomic_set(&lo->lo_refcnt, 0); in loop_add()
2383 mutex_init(&lo->lo_mutex); in loop_add()
2384 lo->lo_number = i; in loop_add()
2385 spin_lock_init(&lo->lo_lock); in loop_add()
2386 spin_lock_init(&lo->lo_work_lock); in loop_add()
2391 disk->private_data = lo; in loop_add()
2392 disk->queue = lo->lo_queue; in loop_add()
2400 lo->idr_visible = true; in loop_add()
2405 blk_mq_free_tag_set(&lo->tag_set); in loop_add()
2411 kfree(lo); in loop_add()
2416 static void loop_remove(struct loop_device *lo) in loop_remove() argument
2419 del_gendisk(lo->lo_disk); in loop_remove()
2420 blk_cleanup_disk(lo->lo_disk); in loop_remove()
2421 blk_mq_free_tag_set(&lo->tag_set); in loop_remove()
2423 idr_remove(&loop_index_idr, lo->lo_number); in loop_remove()
2426 mutex_destroy(&lo->lo_mutex); in loop_remove()
2427 kfree(lo); in loop_remove()
2441 struct loop_device *lo; in loop_control_remove() local
2453 lo = idr_find(&loop_index_idr, idx); in loop_control_remove()
2454 if (!lo || !lo->idr_visible) in loop_control_remove()
2457 lo->idr_visible = false; in loop_control_remove()
2463 ret = mutex_lock_killable(&lo->lo_mutex); in loop_control_remove()
2466 if (lo->lo_state != Lo_unbound || in loop_control_remove()
2467 atomic_read(&lo->lo_refcnt) > 0) { in loop_control_remove()
2468 mutex_unlock(&lo->lo_mutex); in loop_control_remove()
2473 lo->lo_state = Lo_deleting; in loop_control_remove()
2474 mutex_unlock(&lo->lo_mutex); in loop_control_remove()
2476 loop_remove(lo); in loop_control_remove()
2482 lo->idr_visible = true; in loop_control_remove()
2489 struct loop_device *lo; in loop_control_get_free() local
2495 idr_for_each_entry(&loop_index_idr, lo, id) { in loop_control_get_free()
2497 if (lo->idr_visible && data_race(lo->lo_state) == Lo_unbound) in loop_control_get_free()
2607 struct loop_device *lo; in loop_exit() local
2619 idr_for_each_entry(&loop_index_idr, lo, id) in loop_exit()
2620 loop_remove(lo); in loop_exit()