Lines Matching refs:lo
92 static int transfer_xor(struct loop_device *lo, int cmd, in transfer_xor() argument
110 key = lo->lo_encrypt_key; in transfer_xor()
111 keysize = lo->lo_encrypt_key_size; in transfer_xor()
121 static int xor_init(struct loop_device *lo, const struct loop_info64 *info) in xor_init() argument
165 static loff_t get_loop_size(struct loop_device *lo, struct file *file) in get_loop_size() argument
167 return get_size(lo->lo_offset, lo->lo_sizelimit, file); in get_loop_size()
170 static void __loop_update_dio(struct loop_device *lo, bool dio) in __loop_update_dio() argument
172 struct file *file = lo->lo_backing_file; in __loop_update_dio()
195 if (queue_logical_block_size(lo->lo_queue) >= sb_bsize && in __loop_update_dio()
196 !(lo->lo_offset & dio_align) && in __loop_update_dio()
198 !lo->transfer) in __loop_update_dio()
206 if (lo->use_dio == use_dio) in __loop_update_dio()
217 if (lo->lo_state == Lo_bound) in __loop_update_dio()
218 blk_mq_freeze_queue(lo->lo_queue); in __loop_update_dio()
219 lo->use_dio = use_dio; in __loop_update_dio()
221 blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
222 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in __loop_update_dio()
224 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
225 lo->lo_flags &= ~LO_FLAGS_DIRECT_IO; in __loop_update_dio()
227 if (lo->lo_state == Lo_bound) in __loop_update_dio()
228 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_update_dio()
252 static void loop_set_size(struct loop_device *lo, loff_t size) in loop_set_size() argument
254 struct block_device *bdev = lo->lo_device; in loop_set_size()
258 if (!set_capacity_revalidate_and_notify(lo->lo_disk, size, false)) in loop_set_size()
263 lo_do_transfer(struct loop_device *lo, int cmd, in lo_do_transfer() argument
270 ret = lo->transfer(lo, cmd, rpage, roffs, lpage, loffs, size, rblock); in lo_do_transfer()
302 static int lo_write_simple(struct loop_device *lo, struct request *rq, in lo_write_simple() argument
310 ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos); in lo_write_simple()
324 static int lo_write_transfer(struct loop_device *lo, struct request *rq, in lo_write_transfer() argument
337 ret = lo_do_transfer(lo, WRITE, page, 0, bvec.bv_page, in lo_write_transfer()
345 ret = lo_write_bvec(lo->lo_backing_file, &b, &pos); in lo_write_transfer()
354 static int lo_read_simple(struct loop_device *lo, struct request *rq, in lo_read_simple() argument
364 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_simple()
383 static int lo_read_transfer(struct loop_device *lo, struct request *rq, in lo_read_transfer() argument
405 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_transfer()
411 ret = lo_do_transfer(lo, READ, page, 0, bvec.bv_page, in lo_read_transfer()
433 static int lo_fallocate(struct loop_device *lo, struct request *rq, loff_t pos, in lo_fallocate() argument
442 struct file *file = lo->lo_backing_file; in lo_fallocate()
443 struct request_queue *q = lo->lo_queue; in lo_fallocate()
460 static int lo_req_flush(struct loop_device *lo, struct request *rq) in lo_req_flush() argument
462 struct file *file = lo->lo_backing_file; in lo_req_flush()
527 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, in lo_rw_aio() argument
535 struct file *file = lo->lo_backing_file; in lo_rw_aio()
599 static int do_req_filebacked(struct loop_device *lo, struct request *rq) in do_req_filebacked() argument
602 loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; in do_req_filebacked()
615 return lo_req_flush(lo, rq); in do_req_filebacked()
621 return lo_fallocate(lo, rq, pos, in do_req_filebacked()
626 return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE); in do_req_filebacked()
628 if (lo->transfer) in do_req_filebacked()
629 return lo_write_transfer(lo, rq, pos); in do_req_filebacked()
631 return lo_rw_aio(lo, cmd, pos, WRITE); in do_req_filebacked()
633 return lo_write_simple(lo, rq, pos); in do_req_filebacked()
635 if (lo->transfer) in do_req_filebacked()
636 return lo_read_transfer(lo, rq, pos); in do_req_filebacked()
638 return lo_rw_aio(lo, cmd, pos, READ); in do_req_filebacked()
640 return lo_read_simple(lo, rq, pos); in do_req_filebacked()
647 static inline void loop_update_dio(struct loop_device *lo) in loop_update_dio() argument
649 __loop_update_dio(lo, (lo->lo_backing_file->f_flags & O_DIRECT) | in loop_update_dio()
650 lo->use_dio); in loop_update_dio()
653 static void loop_reread_partitions(struct loop_device *lo, in loop_reread_partitions() argument
663 __func__, lo->lo_number, lo->lo_file_name, rc); in loop_reread_partitions()
704 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev, in loop_change_fd() argument
715 if (lo->lo_state != Lo_bound) in loop_change_fd()
720 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_change_fd()
732 old_file = lo->lo_backing_file; in loop_change_fd()
737 if (get_loop_size(lo, file) != get_loop_size(lo, old_file)) in loop_change_fd()
741 blk_mq_freeze_queue(lo->lo_queue); in loop_change_fd()
742 mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask); in loop_change_fd()
743 lo->lo_backing_file = file; in loop_change_fd()
744 lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping); in loop_change_fd()
746 lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_change_fd()
747 loop_update_dio(lo); in loop_change_fd()
748 blk_mq_unfreeze_queue(lo->lo_queue); in loop_change_fd()
749 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_change_fd()
758 loop_reread_partitions(lo, bdev); in loop_change_fd()
774 struct loop_device *lo = disk->private_data; in loop_attr_show() local
776 return callback(lo, page); in loop_attr_show()
789 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) in loop_attr_backing_file_show() argument
794 spin_lock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
795 if (lo->lo_backing_file) in loop_attr_backing_file_show()
796 p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1); in loop_attr_backing_file_show()
797 spin_unlock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
811 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf) in loop_attr_offset_show() argument
813 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_offset); in loop_attr_offset_show()
816 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf) in loop_attr_sizelimit_show() argument
818 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit); in loop_attr_sizelimit_show()
821 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf) in loop_attr_autoclear_show() argument
823 int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR); in loop_attr_autoclear_show()
828 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf) in loop_attr_partscan_show() argument
830 int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN); in loop_attr_partscan_show()
835 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf) in loop_attr_dio_show() argument
837 int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO); in loop_attr_dio_show()
864 static void loop_sysfs_init(struct loop_device *lo) in loop_sysfs_init() argument
866 lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_init()
870 static void loop_sysfs_exit(struct loop_device *lo) in loop_sysfs_exit() argument
872 if (lo->sysfs_inited) in loop_sysfs_exit()
873 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_exit()
877 static void loop_config_discard(struct loop_device *lo) in loop_config_discard() argument
879 struct file *file = lo->lo_backing_file; in loop_config_discard()
881 struct request_queue *q = lo->lo_queue; in loop_config_discard()
891 if (S_ISBLK(inode->i_mode) && !lo->lo_encrypt_key_size) { in loop_config_discard()
906 } else if (!file->f_op->fallocate || lo->lo_encrypt_key_size) { in loop_config_discard()
929 static void loop_unprepare_queue(struct loop_device *lo) in loop_unprepare_queue() argument
931 kthread_flush_worker(&lo->worker); in loop_unprepare_queue()
932 kthread_stop(lo->worker_task); in loop_unprepare_queue()
941 static int loop_prepare_queue(struct loop_device *lo) in loop_prepare_queue() argument
943 kthread_init_worker(&lo->worker); in loop_prepare_queue()
944 lo->worker_task = kthread_run(loop_kthread_worker_fn, in loop_prepare_queue()
945 &lo->worker, "loop%d", lo->lo_number); in loop_prepare_queue()
946 if (IS_ERR(lo->worker_task)) in loop_prepare_queue()
948 set_user_nice(lo->worker_task, MIN_NICE); in loop_prepare_queue()
952 static void loop_update_rotational(struct loop_device *lo) in loop_update_rotational() argument
954 struct file *file = lo->lo_backing_file; in loop_update_rotational()
957 struct request_queue *q = lo->lo_queue; in loop_update_rotational()
971 loop_release_xfer(struct loop_device *lo) in loop_release_xfer() argument
974 struct loop_func_table *xfer = lo->lo_encryption; in loop_release_xfer()
978 err = xfer->release(lo); in loop_release_xfer()
979 lo->transfer = NULL; in loop_release_xfer()
980 lo->lo_encryption = NULL; in loop_release_xfer()
987 loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer, in loop_init_xfer() argument
998 err = xfer->init(lo, i); in loop_init_xfer()
1002 lo->lo_encryption = xfer; in loop_init_xfer()
1016 loop_set_status_from_info(struct loop_device *lo, in loop_set_status_from_info() argument
1026 err = loop_release_xfer(lo); in loop_set_status_from_info()
1041 err = loop_init_xfer(lo, xfer, info); in loop_set_status_from_info()
1045 lo->lo_offset = info->lo_offset; in loop_set_status_from_info()
1046 lo->lo_sizelimit = info->lo_sizelimit; in loop_set_status_from_info()
1047 memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); in loop_set_status_from_info()
1048 memcpy(lo->lo_crypt_name, info->lo_crypt_name, LO_NAME_SIZE); in loop_set_status_from_info()
1049 lo->lo_file_name[LO_NAME_SIZE-1] = 0; in loop_set_status_from_info()
1050 lo->lo_crypt_name[LO_NAME_SIZE-1] = 0; in loop_set_status_from_info()
1054 lo->transfer = xfer->transfer; in loop_set_status_from_info()
1055 lo->ioctl = xfer->ioctl; in loop_set_status_from_info()
1057 lo->lo_flags = info->lo_flags; in loop_set_status_from_info()
1059 lo->lo_encrypt_key_size = info->lo_encrypt_key_size; in loop_set_status_from_info()
1060 lo->lo_init[0] = info->lo_init[0]; in loop_set_status_from_info()
1061 lo->lo_init[1] = info->lo_init[1]; in loop_set_status_from_info()
1063 memcpy(lo->lo_encrypt_key, info->lo_encrypt_key, in loop_set_status_from_info()
1065 lo->lo_key_owner = uid; in loop_set_status_from_info()
1071 static int loop_configure(struct loop_device *lo, fmode_t mode, in loop_configure() argument
1108 if (lo->lo_state != Lo_unbound) in loop_configure()
1129 error = loop_set_status_from_info(lo, &config->info); in loop_configure()
1135 lo->lo_flags |= LO_FLAGS_READ_ONLY; in loop_configure()
1137 error = loop_prepare_queue(lo); in loop_configure()
1141 set_device_ro(bdev, (lo->lo_flags & LO_FLAGS_READ_ONLY) != 0); in loop_configure()
1143 lo->use_dio = lo->lo_flags & LO_FLAGS_DIRECT_IO; in loop_configure()
1144 lo->lo_device = bdev; in loop_configure()
1145 lo->lo_backing_file = file; in loop_configure()
1146 lo->old_gfp_mask = mapping_gfp_mask(mapping); in loop_configure()
1147 mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_configure()
1149 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync) in loop_configure()
1150 blk_queue_write_cache(lo->lo_queue, true, false); in loop_configure()
1154 else if ((lo->lo_backing_file->f_flags & O_DIRECT) && inode->i_sb->s_bdev) in loop_configure()
1160 blk_queue_logical_block_size(lo->lo_queue, bsize); in loop_configure()
1161 blk_queue_physical_block_size(lo->lo_queue, bsize); in loop_configure()
1162 blk_queue_io_min(lo->lo_queue, bsize); in loop_configure()
1164 loop_update_rotational(lo); in loop_configure()
1165 loop_update_dio(lo); in loop_configure()
1166 loop_sysfs_init(lo); in loop_configure()
1168 size = get_loop_size(lo, file); in loop_configure()
1169 loop_set_size(lo, size); in loop_configure()
1174 lo->lo_state = Lo_bound; in loop_configure()
1176 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_configure()
1177 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_configure()
1179 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_configure()
1187 loop_reread_partitions(lo, bdev); in loop_configure()
1205 static int __loop_clr_fd(struct loop_device *lo, bool release) in __loop_clr_fd() argument
1208 gfp_t gfp = lo->old_gfp_mask; in __loop_clr_fd()
1209 struct block_device *bdev = lo->lo_device; in __loop_clr_fd()
1215 if (WARN_ON_ONCE(lo->lo_state != Lo_rundown)) { in __loop_clr_fd()
1220 filp = lo->lo_backing_file; in __loop_clr_fd()
1227 blk_mq_freeze_queue(lo->lo_queue); in __loop_clr_fd()
1229 spin_lock_irq(&lo->lo_lock); in __loop_clr_fd()
1230 lo->lo_backing_file = NULL; in __loop_clr_fd()
1231 spin_unlock_irq(&lo->lo_lock); in __loop_clr_fd()
1233 loop_release_xfer(lo); in __loop_clr_fd()
1234 lo->transfer = NULL; in __loop_clr_fd()
1235 lo->ioctl = NULL; in __loop_clr_fd()
1236 lo->lo_device = NULL; in __loop_clr_fd()
1237 lo->lo_encryption = NULL; in __loop_clr_fd()
1238 lo->lo_offset = 0; in __loop_clr_fd()
1239 lo->lo_sizelimit = 0; in __loop_clr_fd()
1240 lo->lo_encrypt_key_size = 0; in __loop_clr_fd()
1241 memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE); in __loop_clr_fd()
1242 memset(lo->lo_crypt_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1243 memset(lo->lo_file_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1244 blk_queue_logical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1245 blk_queue_physical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1246 blk_queue_io_min(lo->lo_queue, 512); in __loop_clr_fd()
1252 set_capacity(lo->lo_disk, 0); in __loop_clr_fd()
1253 loop_sysfs_exit(lo); in __loop_clr_fd()
1262 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_clr_fd()
1264 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN && bdev; in __loop_clr_fd()
1265 lo_number = lo->lo_number; in __loop_clr_fd()
1266 loop_unprepare_queue(lo); in __loop_clr_fd()
1300 lo->lo_flags = 0; in __loop_clr_fd()
1302 lo->lo_disk->flags |= GENHD_FL_NO_PART_SCAN; in __loop_clr_fd()
1303 lo->lo_state = Lo_unbound; in __loop_clr_fd()
1317 static int loop_clr_fd(struct loop_device *lo) in loop_clr_fd() argument
1324 if (lo->lo_state != Lo_bound) { in loop_clr_fd()
1338 if (atomic_read(&lo->lo_refcnt) > 1) { in loop_clr_fd()
1339 lo->lo_flags |= LO_FLAGS_AUTOCLEAR; in loop_clr_fd()
1343 lo->lo_state = Lo_rundown; in loop_clr_fd()
1346 return __loop_clr_fd(lo, false); in loop_clr_fd()
1350 loop_set_status(struct loop_device *lo, const struct loop_info64 *info) in loop_set_status() argument
1362 if (lo->lo_encrypt_key_size && in loop_set_status()
1363 !uid_eq(lo->lo_key_owner, uid) && in loop_set_status()
1368 if (lo->lo_state != Lo_bound) { in loop_set_status()
1373 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1374 lo->lo_sizelimit != info->lo_sizelimit) { in loop_set_status()
1376 sync_blockdev(lo->lo_device); in loop_set_status()
1377 invalidate_bdev(lo->lo_device); in loop_set_status()
1381 blk_mq_freeze_queue(lo->lo_queue); in loop_set_status()
1383 if (size_changed && lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_status()
1387 __func__, lo->lo_number, lo->lo_file_name, in loop_set_status()
1388 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_status()
1392 prev_lo_flags = lo->lo_flags; in loop_set_status()
1394 err = loop_set_status_from_info(lo, info); in loop_set_status()
1399 lo->lo_flags &= LOOP_SET_STATUS_SETTABLE_FLAGS; in loop_set_status()
1401 lo->lo_flags |= prev_lo_flags & ~LOOP_SET_STATUS_SETTABLE_FLAGS; in loop_set_status()
1403 lo->lo_flags |= prev_lo_flags & ~LOOP_SET_STATUS_CLEARABLE_FLAGS; in loop_set_status()
1406 loff_t new_size = get_size(lo->lo_offset, lo->lo_sizelimit, in loop_set_status()
1407 lo->lo_backing_file); in loop_set_status()
1408 loop_set_size(lo, new_size); in loop_set_status()
1411 loop_config_discard(lo); in loop_set_status()
1414 __loop_update_dio(lo, lo->use_dio); in loop_set_status()
1417 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_status()
1419 if (!err && (lo->lo_flags & LO_FLAGS_PARTSCAN) && in loop_set_status()
1421 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_set_status()
1422 bdev = lo->lo_device; in loop_set_status()
1428 loop_reread_partitions(lo, bdev); in loop_set_status()
1434 loop_get_status(struct loop_device *lo, struct loop_info64 *info) in loop_get_status() argument
1443 if (lo->lo_state != Lo_bound) { in loop_get_status()
1449 info->lo_number = lo->lo_number; in loop_get_status()
1450 info->lo_offset = lo->lo_offset; in loop_get_status()
1451 info->lo_sizelimit = lo->lo_sizelimit; in loop_get_status()
1452 info->lo_flags = lo->lo_flags; in loop_get_status()
1453 memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE); in loop_get_status()
1454 memcpy(info->lo_crypt_name, lo->lo_crypt_name, LO_NAME_SIZE); in loop_get_status()
1456 lo->lo_encryption ? lo->lo_encryption->number : 0; in loop_get_status()
1457 if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) { in loop_get_status()
1458 info->lo_encrypt_key_size = lo->lo_encrypt_key_size; in loop_get_status()
1459 memcpy(info->lo_encrypt_key, lo->lo_encrypt_key, in loop_get_status()
1460 lo->lo_encrypt_key_size); in loop_get_status()
1464 path = lo->lo_backing_file->f_path; in loop_get_status()
1530 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg) in loop_set_status_old() argument
1538 return loop_set_status(lo, &info64); in loop_set_status_old()
1542 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg) in loop_set_status64() argument
1548 return loop_set_status(lo, &info64); in loop_set_status64()
1552 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) { in loop_get_status_old() argument
1559 err = loop_get_status(lo, &info64); in loop_get_status_old()
1569 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { in loop_get_status64() argument
1575 err = loop_get_status(lo, &info64); in loop_get_status64()
1582 static int loop_set_capacity(struct loop_device *lo) in loop_set_capacity() argument
1586 if (unlikely(lo->lo_state != Lo_bound)) in loop_set_capacity()
1589 size = get_loop_size(lo, lo->lo_backing_file); in loop_set_capacity()
1590 loop_set_size(lo, size); in loop_set_capacity()
1595 static int loop_set_dio(struct loop_device *lo, unsigned long arg) in loop_set_dio() argument
1598 if (lo->lo_state != Lo_bound) in loop_set_dio()
1601 __loop_update_dio(lo, !!arg); in loop_set_dio()
1602 if (lo->use_dio == !!arg) in loop_set_dio()
1609 static int loop_set_block_size(struct loop_device *lo, unsigned long arg) in loop_set_block_size() argument
1613 if (lo->lo_state != Lo_bound) in loop_set_block_size()
1620 if (lo->lo_queue->limits.logical_block_size == arg) in loop_set_block_size()
1623 sync_blockdev(lo->lo_device); in loop_set_block_size()
1624 invalidate_bdev(lo->lo_device); in loop_set_block_size()
1626 blk_mq_freeze_queue(lo->lo_queue); in loop_set_block_size()
1629 if (lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_block_size()
1632 __func__, lo->lo_number, lo->lo_file_name, in loop_set_block_size()
1633 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_block_size()
1637 blk_queue_logical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1638 blk_queue_physical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1639 blk_queue_io_min(lo->lo_queue, arg); in loop_set_block_size()
1640 loop_update_dio(lo); in loop_set_block_size()
1642 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_block_size()
1647 static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd, in lo_simple_ioctl() argument
1657 err = loop_set_capacity(lo); in lo_simple_ioctl()
1660 err = loop_set_dio(lo, arg); in lo_simple_ioctl()
1663 err = loop_set_block_size(lo, arg); in lo_simple_ioctl()
1666 err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL; in lo_simple_ioctl()
1675 struct loop_device *lo = bdev->bd_disk->private_data; in lo_ioctl() local
1691 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1699 return loop_configure(lo, mode, bdev, &config); in lo_ioctl()
1702 return loop_change_fd(lo, bdev, arg); in lo_ioctl()
1704 return loop_clr_fd(lo); in lo_ioctl()
1708 err = loop_set_status_old(lo, argp); in lo_ioctl()
1712 return loop_get_status_old(lo, argp); in lo_ioctl()
1716 err = loop_set_status64(lo, argp); in lo_ioctl()
1720 return loop_get_status64(lo, argp); in lo_ioctl()
1728 err = lo_simple_ioctl(lo, cmd, arg); in lo_ioctl()
1826 loop_set_status_compat(struct loop_device *lo, in loop_set_status_compat() argument
1835 return loop_set_status(lo, &info64); in loop_set_status_compat()
1839 loop_get_status_compat(struct loop_device *lo, in loop_get_status_compat() argument
1847 err = loop_get_status(lo, &info64); in loop_get_status_compat()
1856 struct loop_device *lo = bdev->bd_disk->private_data; in lo_compat_ioctl() local
1861 err = loop_set_status_compat(lo, in lo_compat_ioctl()
1865 err = loop_get_status_compat(lo, in lo_compat_ioctl()
1891 struct loop_device *lo; in lo_open() local
1897 lo = bdev->bd_disk->private_data; in lo_open()
1898 if (!lo) { in lo_open()
1903 atomic_inc(&lo->lo_refcnt); in lo_open()
1911 struct loop_device *lo; in lo_release() local
1914 lo = disk->private_data; in lo_release()
1915 if (atomic_dec_return(&lo->lo_refcnt)) in lo_release()
1918 if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) { in lo_release()
1919 if (lo->lo_state != Lo_bound) in lo_release()
1921 lo->lo_state = Lo_rundown; in lo_release()
1927 __loop_clr_fd(lo, true); in lo_release()
1929 } else if (lo->lo_state == Lo_bound) { in lo_release()
1934 blk_mq_freeze_queue(lo->lo_queue); in lo_release()
1935 blk_mq_unfreeze_queue(lo->lo_queue); in lo_release()
1975 struct loop_device *lo = ptr; in unregister_transfer_cb() local
1979 if (lo->lo_encryption == xfer) in unregister_transfer_cb()
1980 loop_release_xfer(lo); in unregister_transfer_cb()
2006 struct loop_device *lo = rq->q->queuedata; in loop_queue_rq() local
2010 if (lo->lo_state != Lo_bound) in loop_queue_rq()
2020 cmd->use_aio = lo->use_dio; in loop_queue_rq()
2032 kthread_queue_work(&lo->worker, &cmd->work); in loop_queue_rq()
2041 struct loop_device *lo = rq->q->queuedata; in loop_handle_cmd() local
2044 if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) { in loop_handle_cmd()
2049 ret = do_req_filebacked(lo, rq); in loop_handle_cmd()
2087 struct loop_device *lo; in loop_add() local
2092 lo = kzalloc(sizeof(*lo), GFP_KERNEL); in loop_add()
2093 if (!lo) in loop_add()
2096 lo->lo_state = Lo_unbound; in loop_add()
2100 err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL); in loop_add()
2104 err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL); in loop_add()
2111 lo->tag_set.ops = &loop_mq_ops; in loop_add()
2112 lo->tag_set.nr_hw_queues = 1; in loop_add()
2113 lo->tag_set.queue_depth = 128; in loop_add()
2114 lo->tag_set.numa_node = NUMA_NO_NODE; in loop_add()
2115 lo->tag_set.cmd_size = sizeof(struct loop_cmd); in loop_add()
2116 lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING; in loop_add()
2117 lo->tag_set.driver_data = lo; in loop_add()
2119 err = blk_mq_alloc_tag_set(&lo->tag_set); in loop_add()
2123 lo->lo_queue = blk_mq_init_queue(&lo->tag_set); in loop_add()
2124 if (IS_ERR(lo->lo_queue)) { in loop_add()
2125 err = PTR_ERR(lo->lo_queue); in loop_add()
2128 lo->lo_queue->queuedata = lo; in loop_add()
2130 blk_queue_max_hw_sectors(lo->lo_queue, BLK_DEF_MAX_SECTORS); in loop_add()
2138 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in loop_add()
2141 disk = lo->lo_disk = alloc_disk(1 << part_shift); in loop_add()
2166 atomic_set(&lo->lo_refcnt, 0); in loop_add()
2167 lo->lo_number = i; in loop_add()
2168 spin_lock_init(&lo->lo_lock); in loop_add()
2172 disk->private_data = lo; in loop_add()
2173 disk->queue = lo->lo_queue; in loop_add()
2176 *l = lo; in loop_add()
2177 return lo->lo_number; in loop_add()
2180 blk_cleanup_queue(lo->lo_queue); in loop_add()
2182 blk_mq_free_tag_set(&lo->tag_set); in loop_add()
2186 kfree(lo); in loop_add()
2191 static void loop_remove(struct loop_device *lo) in loop_remove() argument
2193 del_gendisk(lo->lo_disk); in loop_remove()
2194 blk_cleanup_queue(lo->lo_queue); in loop_remove()
2195 blk_mq_free_tag_set(&lo->tag_set); in loop_remove()
2196 put_disk(lo->lo_disk); in loop_remove()
2197 kfree(lo); in loop_remove()
2202 struct loop_device *lo = ptr; in find_free_cb() local
2205 if (lo->lo_state == Lo_unbound) { in find_free_cb()
2206 *l = lo; in find_free_cb()
2214 struct loop_device *lo; in loop_lookup() local
2220 err = idr_for_each(&loop_index_idr, &find_free_cb, &lo); in loop_lookup()
2222 *l = lo; in loop_lookup()
2223 ret = lo->lo_number; in loop_lookup()
2229 lo = idr_find(&loop_index_idr, i); in loop_lookup()
2230 if (lo) { in loop_lookup()
2231 *l = lo; in loop_lookup()
2232 ret = lo->lo_number; in loop_lookup()
2240 struct loop_device *lo; in loop_probe() local
2245 err = loop_lookup(&lo, MINOR(dev) >> part_shift); in loop_probe()
2247 err = loop_add(&lo, MINOR(dev) >> part_shift); in loop_probe()
2251 kobj = get_disk_and_module(lo->lo_disk); in loop_probe()
2261 struct loop_device *lo; in loop_control_ioctl() local
2271 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
2276 ret = loop_add(&lo, parm); in loop_control_ioctl()
2279 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
2282 if (lo->lo_state != Lo_unbound) { in loop_control_ioctl()
2286 if (atomic_read(&lo->lo_refcnt) > 0) { in loop_control_ioctl()
2290 lo->lo_disk->private_data = NULL; in loop_control_ioctl()
2291 idr_remove(&loop_index_idr, lo->lo_number); in loop_control_ioctl()
2292 loop_remove(lo); in loop_control_ioctl()
2295 ret = loop_lookup(&lo, -1); in loop_control_ioctl()
2298 ret = loop_add(&lo, -1); in loop_control_ioctl()
2326 struct loop_device *lo; in loop_init() local
2386 loop_add(&lo, i); in loop_init()
2400 struct loop_device *lo = ptr; in loop_exit_cb() local
2402 loop_remove(lo); in loop_exit_cb()