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 blk_mq_freeze_queue(lo->lo_queue); in __loop_update_dio()
218 lo->use_dio = use_dio; in __loop_update_dio()
220 blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
221 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in __loop_update_dio()
223 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in __loop_update_dio()
224 lo->lo_flags &= ~LO_FLAGS_DIRECT_IO; in __loop_update_dio()
226 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_update_dio()
230 figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) in figure_loop_size() argument
232 loff_t size = get_size(offset, sizelimit, lo->lo_backing_file); in figure_loop_size()
234 struct block_device *bdev = lo->lo_device; in figure_loop_size()
238 if (lo->lo_offset != offset) in figure_loop_size()
239 lo->lo_offset = offset; in figure_loop_size()
240 if (lo->lo_sizelimit != sizelimit) in figure_loop_size()
241 lo->lo_sizelimit = sizelimit; in figure_loop_size()
242 set_capacity(lo->lo_disk, x); in figure_loop_size()
250 lo_do_transfer(struct loop_device *lo, int cmd, in lo_do_transfer() argument
257 ret = lo->transfer(lo, cmd, rpage, roffs, lpage, loffs, size, rblock); in lo_do_transfer()
289 static int lo_write_simple(struct loop_device *lo, struct request *rq, in lo_write_simple() argument
297 ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos); in lo_write_simple()
311 static int lo_write_transfer(struct loop_device *lo, struct request *rq, in lo_write_transfer() argument
324 ret = lo_do_transfer(lo, WRITE, page, 0, bvec.bv_page, in lo_write_transfer()
332 ret = lo_write_bvec(lo->lo_backing_file, &b, &pos); in lo_write_transfer()
341 static int lo_read_simple(struct loop_device *lo, struct request *rq, in lo_read_simple() argument
351 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_simple()
370 static int lo_read_transfer(struct loop_device *lo, struct request *rq, in lo_read_transfer() argument
392 len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0); in lo_read_transfer()
398 ret = lo_do_transfer(lo, READ, page, 0, bvec.bv_page, in lo_read_transfer()
420 static int lo_discard(struct loop_device *lo, struct request *rq, loff_t pos) in lo_discard() argument
428 struct file *file = lo->lo_backing_file; in lo_discard()
432 if ((!file->f_op->fallocate) || lo->lo_encrypt_key_size) { in lo_discard()
444 static int lo_req_flush(struct loop_device *lo, struct request *rq) in lo_req_flush() argument
446 struct file *file = lo->lo_backing_file; in lo_req_flush()
510 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, in lo_rw_aio() argument
518 struct file *file = lo->lo_backing_file; in lo_rw_aio()
582 static int do_req_filebacked(struct loop_device *lo, struct request *rq) in do_req_filebacked() argument
585 loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; in do_req_filebacked()
598 return lo_req_flush(lo, rq); in do_req_filebacked()
601 return lo_discard(lo, rq, pos); in do_req_filebacked()
603 if (lo->transfer) in do_req_filebacked()
604 return lo_write_transfer(lo, rq, pos); in do_req_filebacked()
606 return lo_rw_aio(lo, cmd, pos, WRITE); in do_req_filebacked()
608 return lo_write_simple(lo, rq, pos); in do_req_filebacked()
610 if (lo->transfer) in do_req_filebacked()
611 return lo_read_transfer(lo, rq, pos); in do_req_filebacked()
613 return lo_rw_aio(lo, cmd, pos, READ); in do_req_filebacked()
615 return lo_read_simple(lo, rq, pos); in do_req_filebacked()
622 static inline void loop_update_dio(struct loop_device *lo) in loop_update_dio() argument
624 __loop_update_dio(lo, io_is_direct(lo->lo_backing_file) | in loop_update_dio()
625 lo->use_dio); in loop_update_dio()
628 static void loop_reread_partitions(struct loop_device *lo, in loop_reread_partitions() argument
636 __func__, lo->lo_number, lo->lo_file_name, rc); in loop_reread_partitions()
677 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev, in loop_change_fd() argument
688 if (lo->lo_state != Lo_bound) in loop_change_fd()
693 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_change_fd()
705 old_file = lo->lo_backing_file; in loop_change_fd()
710 if (get_loop_size(lo, file) != get_loop_size(lo, old_file)) in loop_change_fd()
714 blk_mq_freeze_queue(lo->lo_queue); in loop_change_fd()
715 mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask); in loop_change_fd()
716 lo->lo_backing_file = file; in loop_change_fd()
717 lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping); in loop_change_fd()
719 lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_change_fd()
720 loop_update_dio(lo); in loop_change_fd()
721 blk_mq_unfreeze_queue(lo->lo_queue); in loop_change_fd()
722 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_change_fd()
731 loop_reread_partitions(lo, bdev); in loop_change_fd()
747 struct loop_device *lo = disk->private_data; in loop_attr_show() local
749 return callback(lo, page); in loop_attr_show()
762 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) in loop_attr_backing_file_show() argument
767 spin_lock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
768 if (lo->lo_backing_file) in loop_attr_backing_file_show()
769 p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1); in loop_attr_backing_file_show()
770 spin_unlock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
784 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf) in loop_attr_offset_show() argument
786 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_offset); in loop_attr_offset_show()
789 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf) in loop_attr_sizelimit_show() argument
791 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit); in loop_attr_sizelimit_show()
794 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf) in loop_attr_autoclear_show() argument
796 int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR); in loop_attr_autoclear_show()
801 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf) in loop_attr_partscan_show() argument
803 int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN); in loop_attr_partscan_show()
808 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf) in loop_attr_dio_show() argument
810 int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO); in loop_attr_dio_show()
837 static void loop_sysfs_init(struct loop_device *lo) in loop_sysfs_init() argument
839 lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_init()
843 static void loop_sysfs_exit(struct loop_device *lo) in loop_sysfs_exit() argument
845 if (lo->sysfs_inited) in loop_sysfs_exit()
846 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_exit()
850 static void loop_config_discard(struct loop_device *lo) in loop_config_discard() argument
852 struct file *file = lo->lo_backing_file; in loop_config_discard()
854 struct request_queue *q = lo->lo_queue; in loop_config_discard()
863 lo->lo_encrypt_key_size) { in loop_config_discard()
880 static void loop_unprepare_queue(struct loop_device *lo) in loop_unprepare_queue() argument
882 kthread_flush_worker(&lo->worker); in loop_unprepare_queue()
883 kthread_stop(lo->worker_task); in loop_unprepare_queue()
892 static int loop_prepare_queue(struct loop_device *lo) in loop_prepare_queue() argument
894 kthread_init_worker(&lo->worker); in loop_prepare_queue()
895 lo->worker_task = kthread_run(loop_kthread_worker_fn, in loop_prepare_queue()
896 &lo->worker, "loop%d", lo->lo_number); in loop_prepare_queue()
897 if (IS_ERR(lo->worker_task)) in loop_prepare_queue()
899 set_user_nice(lo->worker_task, MIN_NICE); in loop_prepare_queue()
903 static void loop_update_rotational(struct loop_device *lo) in loop_update_rotational() argument
905 struct file *file = lo->lo_backing_file; in loop_update_rotational()
908 struct request_queue *q = lo->lo_queue; in loop_update_rotational()
921 static int loop_set_fd(struct loop_device *lo, fmode_t mode, in loop_set_fd() argument
958 if (lo->lo_state != Lo_unbound) in loop_set_fd()
973 size = get_loop_size(lo, file); in loop_set_fd()
976 error = loop_prepare_queue(lo); in loop_set_fd()
984 lo->use_dio = false; in loop_set_fd()
985 lo->lo_device = bdev; in loop_set_fd()
986 lo->lo_flags = lo_flags; in loop_set_fd()
987 lo->lo_backing_file = file; in loop_set_fd()
988 lo->transfer = NULL; in loop_set_fd()
989 lo->ioctl = NULL; in loop_set_fd()
990 lo->lo_sizelimit = 0; in loop_set_fd()
991 lo->old_gfp_mask = mapping_gfp_mask(mapping); in loop_set_fd()
992 mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_set_fd()
995 blk_queue_write_cache(lo->lo_queue, true, false); in loop_set_fd()
997 if (io_is_direct(lo->lo_backing_file) && inode->i_sb->s_bdev) { in loop_set_fd()
1002 blk_queue_logical_block_size(lo->lo_queue, bsize); in loop_set_fd()
1003 blk_queue_physical_block_size(lo->lo_queue, bsize); in loop_set_fd()
1004 blk_queue_io_min(lo->lo_queue, bsize); in loop_set_fd()
1007 loop_update_rotational(lo); in loop_set_fd()
1008 loop_update_dio(lo); in loop_set_fd()
1009 set_capacity(lo->lo_disk, size); in loop_set_fd()
1011 loop_sysfs_init(lo); in loop_set_fd()
1018 lo->lo_state = Lo_bound; in loop_set_fd()
1020 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_set_fd()
1021 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN; in loop_set_fd()
1029 loop_reread_partitions(lo, bdev); in loop_set_fd()
1048 loop_release_xfer(struct loop_device *lo) in loop_release_xfer() argument
1051 struct loop_func_table *xfer = lo->lo_encryption; in loop_release_xfer()
1055 err = xfer->release(lo); in loop_release_xfer()
1056 lo->transfer = NULL; in loop_release_xfer()
1057 lo->lo_encryption = NULL; in loop_release_xfer()
1064 loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer, in loop_init_xfer() argument
1075 err = xfer->init(lo, i); in loop_init_xfer()
1079 lo->lo_encryption = xfer; in loop_init_xfer()
1084 static int __loop_clr_fd(struct loop_device *lo, bool release) in __loop_clr_fd() argument
1087 gfp_t gfp = lo->old_gfp_mask; in __loop_clr_fd()
1088 struct block_device *bdev = lo->lo_device; in __loop_clr_fd()
1094 if (WARN_ON_ONCE(lo->lo_state != Lo_rundown)) { in __loop_clr_fd()
1099 filp = lo->lo_backing_file; in __loop_clr_fd()
1106 blk_mq_freeze_queue(lo->lo_queue); in __loop_clr_fd()
1108 spin_lock_irq(&lo->lo_lock); in __loop_clr_fd()
1109 lo->lo_backing_file = NULL; in __loop_clr_fd()
1110 spin_unlock_irq(&lo->lo_lock); in __loop_clr_fd()
1112 loop_release_xfer(lo); in __loop_clr_fd()
1113 lo->transfer = NULL; in __loop_clr_fd()
1114 lo->ioctl = NULL; in __loop_clr_fd()
1115 lo->lo_device = NULL; in __loop_clr_fd()
1116 lo->lo_encryption = NULL; in __loop_clr_fd()
1117 lo->lo_offset = 0; in __loop_clr_fd()
1118 lo->lo_sizelimit = 0; in __loop_clr_fd()
1119 lo->lo_encrypt_key_size = 0; in __loop_clr_fd()
1120 memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE); in __loop_clr_fd()
1121 memset(lo->lo_crypt_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1122 memset(lo->lo_file_name, 0, LO_NAME_SIZE); in __loop_clr_fd()
1123 blk_queue_logical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1124 blk_queue_physical_block_size(lo->lo_queue, 512); in __loop_clr_fd()
1125 blk_queue_io_min(lo->lo_queue, 512); in __loop_clr_fd()
1131 set_capacity(lo->lo_disk, 0); in __loop_clr_fd()
1132 loop_sysfs_exit(lo); in __loop_clr_fd()
1141 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_clr_fd()
1143 partscan = lo->lo_flags & LO_FLAGS_PARTSCAN && bdev; in __loop_clr_fd()
1144 lo_number = lo->lo_number; in __loop_clr_fd()
1145 loop_unprepare_queue(lo); in __loop_clr_fd()
1178 lo->lo_flags = 0; in __loop_clr_fd()
1180 lo->lo_disk->flags |= GENHD_FL_NO_PART_SCAN; in __loop_clr_fd()
1181 lo->lo_state = Lo_unbound; in __loop_clr_fd()
1195 static int loop_clr_fd(struct loop_device *lo) in loop_clr_fd() argument
1202 if (lo->lo_state != Lo_bound) { in loop_clr_fd()
1216 if (atomic_read(&lo->lo_refcnt) > 1) { in loop_clr_fd()
1217 lo->lo_flags |= LO_FLAGS_AUTOCLEAR; in loop_clr_fd()
1221 lo->lo_state = Lo_rundown; in loop_clr_fd()
1224 return __loop_clr_fd(lo, false); in loop_clr_fd()
1228 loop_set_status(struct loop_device *lo, const struct loop_info64 *info) in loop_set_status() argument
1239 if (lo->lo_encrypt_key_size && in loop_set_status()
1240 !uid_eq(lo->lo_key_owner, uid) && in loop_set_status()
1245 if (lo->lo_state != Lo_bound) { in loop_set_status()
1254 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1255 lo->lo_sizelimit != info->lo_sizelimit) { in loop_set_status()
1256 sync_blockdev(lo->lo_device); in loop_set_status()
1257 kill_bdev(lo->lo_device); in loop_set_status()
1261 blk_mq_freeze_queue(lo->lo_queue); in loop_set_status()
1263 err = loop_release_xfer(lo); in loop_set_status()
1282 err = loop_init_xfer(lo, xfer, info); in loop_set_status()
1286 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1287 lo->lo_sizelimit != info->lo_sizelimit) { in loop_set_status()
1289 if (lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_status()
1292 __func__, lo->lo_number, lo->lo_file_name, in loop_set_status()
1293 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_status()
1296 if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) { in loop_set_status()
1302 loop_config_discard(lo); in loop_set_status()
1304 memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); in loop_set_status()
1305 memcpy(lo->lo_crypt_name, info->lo_crypt_name, LO_NAME_SIZE); in loop_set_status()
1306 lo->lo_file_name[LO_NAME_SIZE-1] = 0; in loop_set_status()
1307 lo->lo_crypt_name[LO_NAME_SIZE-1] = 0; in loop_set_status()
1311 lo->transfer = xfer->transfer; in loop_set_status()
1312 lo->ioctl = xfer->ioctl; in loop_set_status()
1314 if ((lo->lo_flags & LO_FLAGS_AUTOCLEAR) != in loop_set_status()
1316 lo->lo_flags ^= LO_FLAGS_AUTOCLEAR; in loop_set_status()
1318 lo->lo_encrypt_key_size = info->lo_encrypt_key_size; in loop_set_status()
1319 lo->lo_init[0] = info->lo_init[0]; in loop_set_status()
1320 lo->lo_init[1] = info->lo_init[1]; in loop_set_status()
1322 memcpy(lo->lo_encrypt_key, info->lo_encrypt_key, in loop_set_status()
1324 lo->lo_key_owner = uid; in loop_set_status()
1328 __loop_update_dio(lo, lo->use_dio); in loop_set_status()
1331 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_status()
1334 !(lo->lo_flags & LO_FLAGS_PARTSCAN)) { in loop_set_status()
1335 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_set_status()
1336 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_set_status()
1337 bdev = lo->lo_device; in loop_set_status()
1343 loop_reread_partitions(lo, bdev); in loop_set_status()
1349 loop_get_status(struct loop_device *lo, struct loop_info64 *info) in loop_get_status() argument
1358 if (lo->lo_state != Lo_bound) { in loop_get_status()
1364 info->lo_number = lo->lo_number; in loop_get_status()
1365 info->lo_offset = lo->lo_offset; in loop_get_status()
1366 info->lo_sizelimit = lo->lo_sizelimit; in loop_get_status()
1367 info->lo_flags = lo->lo_flags; in loop_get_status()
1368 memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE); in loop_get_status()
1369 memcpy(info->lo_crypt_name, lo->lo_crypt_name, LO_NAME_SIZE); in loop_get_status()
1371 lo->lo_encryption ? lo->lo_encryption->number : 0; in loop_get_status()
1372 if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) { in loop_get_status()
1373 info->lo_encrypt_key_size = lo->lo_encrypt_key_size; in loop_get_status()
1374 memcpy(info->lo_encrypt_key, lo->lo_encrypt_key, in loop_get_status()
1375 lo->lo_encrypt_key_size); in loop_get_status()
1379 path = lo->lo_backing_file->f_path; in loop_get_status()
1445 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg) in loop_set_status_old() argument
1453 return loop_set_status(lo, &info64); in loop_set_status_old()
1457 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg) in loop_set_status64() argument
1463 return loop_set_status(lo, &info64); in loop_set_status64()
1467 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) { in loop_get_status_old() argument
1474 err = loop_get_status(lo, &info64); in loop_get_status_old()
1484 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { in loop_get_status64() argument
1490 err = loop_get_status(lo, &info64); in loop_get_status64()
1497 static int loop_set_capacity(struct loop_device *lo) in loop_set_capacity() argument
1499 if (unlikely(lo->lo_state != Lo_bound)) in loop_set_capacity()
1502 return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit); in loop_set_capacity()
1505 static int loop_set_dio(struct loop_device *lo, unsigned long arg) in loop_set_dio() argument
1508 if (lo->lo_state != Lo_bound) in loop_set_dio()
1511 __loop_update_dio(lo, !!arg); in loop_set_dio()
1512 if (lo->use_dio == !!arg) in loop_set_dio()
1519 static int loop_set_block_size(struct loop_device *lo, unsigned long arg) in loop_set_block_size() argument
1523 if (lo->lo_state != Lo_bound) in loop_set_block_size()
1529 if (lo->lo_queue->limits.logical_block_size != arg) { in loop_set_block_size()
1530 sync_blockdev(lo->lo_device); in loop_set_block_size()
1531 kill_bdev(lo->lo_device); in loop_set_block_size()
1534 blk_mq_freeze_queue(lo->lo_queue); in loop_set_block_size()
1537 if (lo->lo_queue->limits.logical_block_size != arg && in loop_set_block_size()
1538 lo->lo_device->bd_inode->i_mapping->nrpages) { in loop_set_block_size()
1541 __func__, lo->lo_number, lo->lo_file_name, in loop_set_block_size()
1542 lo->lo_device->bd_inode->i_mapping->nrpages); in loop_set_block_size()
1546 blk_queue_logical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1547 blk_queue_physical_block_size(lo->lo_queue, arg); in loop_set_block_size()
1548 blk_queue_io_min(lo->lo_queue, arg); in loop_set_block_size()
1549 loop_update_dio(lo); in loop_set_block_size()
1551 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_block_size()
1556 static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd, in lo_simple_ioctl() argument
1566 err = loop_set_capacity(lo); in lo_simple_ioctl()
1569 err = loop_set_dio(lo, arg); in lo_simple_ioctl()
1572 err = loop_set_block_size(lo, arg); in lo_simple_ioctl()
1575 err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL; in lo_simple_ioctl()
1584 struct loop_device *lo = bdev->bd_disk->private_data; in lo_ioctl() local
1589 return loop_set_fd(lo, mode, bdev, arg); in lo_ioctl()
1591 return loop_change_fd(lo, bdev, arg); in lo_ioctl()
1593 return loop_clr_fd(lo); in lo_ioctl()
1597 err = loop_set_status_old(lo, in lo_ioctl()
1602 return loop_get_status_old(lo, (struct loop_info __user *) arg); in lo_ioctl()
1606 err = loop_set_status64(lo, in lo_ioctl()
1611 return loop_get_status64(lo, (struct loop_info64 __user *) arg); in lo_ioctl()
1619 err = lo_simple_ioctl(lo, cmd, arg); in lo_ioctl()
1717 loop_set_status_compat(struct loop_device *lo, in loop_set_status_compat() argument
1726 return loop_set_status(lo, &info64); in loop_set_status_compat()
1730 loop_get_status_compat(struct loop_device *lo, in loop_get_status_compat() argument
1738 err = loop_get_status(lo, &info64); in loop_get_status_compat()
1747 struct loop_device *lo = bdev->bd_disk->private_data; in lo_compat_ioctl() local
1752 err = loop_set_status_compat(lo, in lo_compat_ioctl()
1756 err = loop_get_status_compat(lo, in lo_compat_ioctl()
1781 struct loop_device *lo; in lo_open() local
1787 lo = bdev->bd_disk->private_data; in lo_open()
1788 if (!lo) { in lo_open()
1793 atomic_inc(&lo->lo_refcnt); in lo_open()
1801 struct loop_device *lo; in lo_release() local
1804 lo = disk->private_data; in lo_release()
1805 if (atomic_dec_return(&lo->lo_refcnt)) in lo_release()
1808 if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) { in lo_release()
1809 if (lo->lo_state != Lo_bound) in lo_release()
1811 lo->lo_state = Lo_rundown; in lo_release()
1817 __loop_clr_fd(lo, true); in lo_release()
1819 } else if (lo->lo_state == Lo_bound) { in lo_release()
1824 blk_mq_freeze_queue(lo->lo_queue); in lo_release()
1825 blk_mq_unfreeze_queue(lo->lo_queue); in lo_release()
1865 struct loop_device *lo = ptr; in unregister_transfer_cb() local
1869 if (lo->lo_encryption == xfer) in unregister_transfer_cb()
1870 loop_release_xfer(lo); in unregister_transfer_cb()
1896 struct loop_device *lo = rq->q->queuedata; in loop_queue_rq() local
1900 if (lo->lo_state != Lo_bound) in loop_queue_rq()
1910 cmd->use_aio = lo->use_dio; in loop_queue_rq()
1922 kthread_queue_work(&lo->worker, &cmd->work); in loop_queue_rq()
1931 struct loop_device *lo = rq->q->queuedata; in loop_handle_cmd() local
1934 if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) { in loop_handle_cmd()
1939 ret = do_req_filebacked(lo, rq); in loop_handle_cmd()
1973 struct loop_device *lo; in loop_add() local
1978 lo = kzalloc(sizeof(*lo), GFP_KERNEL); in loop_add()
1979 if (!lo) in loop_add()
1982 lo->lo_state = Lo_unbound; in loop_add()
1986 err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL); in loop_add()
1990 err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL); in loop_add()
1997 lo->tag_set.ops = &loop_mq_ops; in loop_add()
1998 lo->tag_set.nr_hw_queues = 1; in loop_add()
1999 lo->tag_set.queue_depth = 128; in loop_add()
2000 lo->tag_set.numa_node = NUMA_NO_NODE; in loop_add()
2001 lo->tag_set.cmd_size = sizeof(struct loop_cmd); in loop_add()
2002 lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; in loop_add()
2003 lo->tag_set.driver_data = lo; in loop_add()
2005 err = blk_mq_alloc_tag_set(&lo->tag_set); in loop_add()
2009 lo->lo_queue = blk_mq_init_queue(&lo->tag_set); in loop_add()
2010 if (IS_ERR(lo->lo_queue)) { in loop_add()
2011 err = PTR_ERR(lo->lo_queue); in loop_add()
2014 lo->lo_queue->queuedata = lo; in loop_add()
2016 blk_queue_max_hw_sectors(lo->lo_queue, BLK_DEF_MAX_SECTORS); in loop_add()
2024 blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue); in loop_add()
2027 disk = lo->lo_disk = alloc_disk(1 << part_shift); in loop_add()
2052 atomic_set(&lo->lo_refcnt, 0); in loop_add()
2053 lo->lo_number = i; in loop_add()
2054 spin_lock_init(&lo->lo_lock); in loop_add()
2058 disk->private_data = lo; in loop_add()
2059 disk->queue = lo->lo_queue; in loop_add()
2062 *l = lo; in loop_add()
2063 return lo->lo_number; in loop_add()
2066 blk_cleanup_queue(lo->lo_queue); in loop_add()
2068 blk_mq_free_tag_set(&lo->tag_set); in loop_add()
2072 kfree(lo); in loop_add()
2077 static void loop_remove(struct loop_device *lo) in loop_remove() argument
2079 del_gendisk(lo->lo_disk); in loop_remove()
2080 blk_cleanup_queue(lo->lo_queue); in loop_remove()
2081 blk_mq_free_tag_set(&lo->tag_set); in loop_remove()
2082 put_disk(lo->lo_disk); in loop_remove()
2083 kfree(lo); in loop_remove()
2088 struct loop_device *lo = ptr; in find_free_cb() local
2091 if (lo->lo_state == Lo_unbound) { in find_free_cb()
2092 *l = lo; in find_free_cb()
2100 struct loop_device *lo; in loop_lookup() local
2106 err = idr_for_each(&loop_index_idr, &find_free_cb, &lo); in loop_lookup()
2108 *l = lo; in loop_lookup()
2109 ret = lo->lo_number; in loop_lookup()
2115 lo = idr_find(&loop_index_idr, i); in loop_lookup()
2116 if (lo) { in loop_lookup()
2117 *l = lo; in loop_lookup()
2118 ret = lo->lo_number; in loop_lookup()
2126 struct loop_device *lo; in loop_probe() local
2131 err = loop_lookup(&lo, MINOR(dev) >> part_shift); in loop_probe()
2133 err = loop_add(&lo, MINOR(dev) >> part_shift); in loop_probe()
2137 kobj = get_disk_and_module(lo->lo_disk); in loop_probe()
2147 struct loop_device *lo; in loop_control_ioctl() local
2157 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
2162 ret = loop_add(&lo, parm); in loop_control_ioctl()
2165 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
2168 if (lo->lo_state != Lo_unbound) { in loop_control_ioctl()
2172 if (atomic_read(&lo->lo_refcnt) > 0) { in loop_control_ioctl()
2176 lo->lo_disk->private_data = NULL; in loop_control_ioctl()
2177 idr_remove(&loop_index_idr, lo->lo_number); in loop_control_ioctl()
2178 loop_remove(lo); in loop_control_ioctl()
2181 ret = loop_lookup(&lo, -1); in loop_control_ioctl()
2184 ret = loop_add(&lo, -1); in loop_control_ioctl()
2212 struct loop_device *lo; in loop_init() local
2272 loop_add(&lo, i); in loop_init()
2286 struct loop_device *lo = ptr; in loop_exit_cb() local
2288 loop_remove(lo); in loop_exit_cb()