Lines Matching refs:lo
89 static int transfer_xor(struct loop_device *lo, int cmd, in transfer_xor() argument
107 key = lo->lo_encrypt_key; in transfer_xor()
108 keysize = lo->lo_encrypt_key_size; in transfer_xor()
118 static int xor_init(struct loop_device *lo, const struct loop_info64 *info) in xor_init() argument
162 static loff_t get_loop_size(struct loop_device *lo, struct file *file) in get_loop_size() argument
164 return get_size(lo->lo_offset, lo->lo_sizelimit, file); in get_loop_size()
167 static void __loop_update_dio(struct loop_device *lo, bool dio) in __loop_update_dio() argument
169 struct file *file = lo->lo_backing_file; in __loop_update_dio()
192 if (queue_logical_block_size(lo->lo_queue) >= sb_bsize && in __loop_update_dio()
193 !(lo->lo_offset & dio_align) && in __loop_update_dio()
195 !lo->transfer) in __loop_update_dio()
203 if (lo->use_dio == use_dio) in __loop_update_dio()
214 blk_mq_freeze_queue(lo->lo_queue); in __loop_update_dio()
215 lo->use_dio = use_dio; in __loop_update_dio()
217 lo->lo_flags |= LO_FLAGS_DIRECT_IO; in __loop_update_dio()
219 lo->lo_flags &= ~LO_FLAGS_DIRECT_IO; in __loop_update_dio()
220 blk_mq_unfreeze_queue(lo->lo_queue); in __loop_update_dio()
224 figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit) in figure_loop_size() argument
226 loff_t size = get_size(offset, sizelimit, lo->lo_backing_file); in figure_loop_size()
228 struct block_device *bdev = lo->lo_device; in figure_loop_size()
232 if (lo->lo_offset != offset) in figure_loop_size()
233 lo->lo_offset = offset; in figure_loop_size()
234 if (lo->lo_sizelimit != sizelimit) in figure_loop_size()
235 lo->lo_sizelimit = sizelimit; in figure_loop_size()
236 set_capacity(lo->lo_disk, x); in figure_loop_size()
244 lo_do_transfer(struct loop_device *lo, int cmd, in lo_do_transfer() argument
251 ret = lo->transfer(lo, cmd, rpage, roffs, lpage, loffs, size, rblock); in lo_do_transfer()
283 static int lo_write_simple(struct loop_device *lo, struct request *rq, in lo_write_simple() argument
291 ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos); in lo_write_simple()
305 static int lo_write_transfer(struct loop_device *lo, struct request *rq, in lo_write_transfer() argument
318 ret = lo_do_transfer(lo, WRITE, page, 0, bvec.bv_page, in lo_write_transfer()
326 ret = lo_write_bvec(lo->lo_backing_file, &b, &pos); in lo_write_transfer()
335 static int lo_read_simple(struct loop_device *lo, struct request *rq, in lo_read_simple() argument
345 len = vfs_iter_read(lo->lo_backing_file, &i, &pos); in lo_read_simple()
364 static int lo_read_transfer(struct loop_device *lo, struct request *rq, in lo_read_transfer() argument
386 len = vfs_iter_read(lo->lo_backing_file, &i, &pos); in lo_read_transfer()
392 ret = lo_do_transfer(lo, READ, page, 0, bvec.bv_page, in lo_read_transfer()
414 static int lo_discard(struct loop_device *lo, struct request *rq, loff_t pos) in lo_discard() argument
422 struct file *file = lo->lo_backing_file; in lo_discard()
426 if ((!file->f_op->fallocate) || lo->lo_encrypt_key_size) { in lo_discard()
438 static int lo_req_flush(struct loop_device *lo, struct request *rq) in lo_req_flush() argument
440 struct file *file = lo->lo_backing_file; in lo_req_flush()
476 static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd, in lo_rw_aio() argument
482 struct file *file = lo->lo_backing_file; in lo_rw_aio()
513 static int do_req_filebacked(struct loop_device *lo, struct request *rq) in do_req_filebacked() argument
516 loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; in do_req_filebacked()
529 return lo_req_flush(lo, rq); in do_req_filebacked()
531 return lo_discard(lo, rq, pos); in do_req_filebacked()
533 if (lo->transfer) in do_req_filebacked()
534 return lo_write_transfer(lo, rq, pos); in do_req_filebacked()
536 return lo_rw_aio(lo, cmd, pos, WRITE); in do_req_filebacked()
538 return lo_write_simple(lo, rq, pos); in do_req_filebacked()
540 if (lo->transfer) in do_req_filebacked()
541 return lo_read_transfer(lo, rq, pos); in do_req_filebacked()
543 return lo_rw_aio(lo, cmd, pos, READ); in do_req_filebacked()
545 return lo_read_simple(lo, rq, pos); in do_req_filebacked()
558 static inline void loop_update_dio(struct loop_device *lo) in loop_update_dio() argument
560 __loop_update_dio(lo, io_is_direct(lo->lo_backing_file) | in loop_update_dio()
561 lo->use_dio); in loop_update_dio()
567 static void do_loop_switch(struct loop_device *lo, struct switch_request *p) in do_loop_switch() argument
570 struct file *old_file = lo->lo_backing_file; in do_loop_switch()
578 mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask); in do_loop_switch()
579 lo->lo_backing_file = file; in do_loop_switch()
580 lo->lo_blocksize = S_ISBLK(mapping->host->i_mode) ? in do_loop_switch()
582 lo->old_gfp_mask = mapping_gfp_mask(mapping); in do_loop_switch()
583 mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in do_loop_switch()
584 loop_update_dio(lo); in do_loop_switch()
592 static int loop_switch(struct loop_device *lo, struct file *file) in loop_switch() argument
599 blk_mq_freeze_queue(lo->lo_queue); in loop_switch()
602 do_loop_switch(lo, &w); in loop_switch()
605 blk_mq_unfreeze_queue(lo->lo_queue); in loop_switch()
613 static int loop_flush(struct loop_device *lo) in loop_flush() argument
616 if (lo->lo_state != Lo_bound) in loop_flush()
618 return loop_switch(lo, NULL); in loop_flush()
621 static void loop_reread_partitions(struct loop_device *lo, in loop_reread_partitions() argument
634 if (!atomic_read(&lo->lo_refcnt)) in loop_reread_partitions()
640 __func__, lo->lo_number, lo->lo_file_name, rc); in loop_reread_partitions()
651 static int loop_change_fd(struct loop_device *lo, struct block_device *bdev, in loop_change_fd() argument
659 if (lo->lo_state != Lo_bound) in loop_change_fd()
664 if (!(lo->lo_flags & LO_FLAGS_READ_ONLY)) in loop_change_fd()
673 old_file = lo->lo_backing_file; in loop_change_fd()
681 if (get_loop_size(lo, file) != get_loop_size(lo, old_file)) in loop_change_fd()
685 error = loop_switch(lo, file); in loop_change_fd()
690 if (lo->lo_flags & LO_FLAGS_PARTSCAN) in loop_change_fd()
691 loop_reread_partitions(lo, bdev); in loop_change_fd()
713 struct loop_device *lo = disk->private_data; in loop_attr_show() local
715 return callback(lo, page); in loop_attr_show()
728 static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf) in loop_attr_backing_file_show() argument
733 spin_lock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
734 if (lo->lo_backing_file) in loop_attr_backing_file_show()
735 p = file_path(lo->lo_backing_file, buf, PAGE_SIZE - 1); in loop_attr_backing_file_show()
736 spin_unlock_irq(&lo->lo_lock); in loop_attr_backing_file_show()
750 static ssize_t loop_attr_offset_show(struct loop_device *lo, char *buf) in loop_attr_offset_show() argument
752 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_offset); in loop_attr_offset_show()
755 static ssize_t loop_attr_sizelimit_show(struct loop_device *lo, char *buf) in loop_attr_sizelimit_show() argument
757 return sprintf(buf, "%llu\n", (unsigned long long)lo->lo_sizelimit); in loop_attr_sizelimit_show()
760 static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf) in loop_attr_autoclear_show() argument
762 int autoclear = (lo->lo_flags & LO_FLAGS_AUTOCLEAR); in loop_attr_autoclear_show()
767 static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf) in loop_attr_partscan_show() argument
769 int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN); in loop_attr_partscan_show()
774 static ssize_t loop_attr_dio_show(struct loop_device *lo, char *buf) in loop_attr_dio_show() argument
776 int dio = (lo->lo_flags & LO_FLAGS_DIRECT_IO); in loop_attr_dio_show()
803 static int loop_sysfs_init(struct loop_device *lo) in loop_sysfs_init() argument
805 return sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_init()
809 static void loop_sysfs_exit(struct loop_device *lo) in loop_sysfs_exit() argument
811 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj, in loop_sysfs_exit()
815 static void loop_config_discard(struct loop_device *lo) in loop_config_discard() argument
817 struct file *file = lo->lo_backing_file; in loop_config_discard()
819 struct request_queue *q = lo->lo_queue; in loop_config_discard()
828 lo->lo_encrypt_key_size) { in loop_config_discard()
844 static void loop_unprepare_queue(struct loop_device *lo) in loop_unprepare_queue() argument
846 kthread_flush_worker(&lo->worker); in loop_unprepare_queue()
847 kthread_stop(lo->worker_task); in loop_unprepare_queue()
850 static int loop_prepare_queue(struct loop_device *lo) in loop_prepare_queue() argument
852 kthread_init_worker(&lo->worker); in loop_prepare_queue()
853 lo->worker_task = kthread_run(kthread_worker_fn, in loop_prepare_queue()
854 &lo->worker, "loop%d", lo->lo_number); in loop_prepare_queue()
855 if (IS_ERR(lo->worker_task)) in loop_prepare_queue()
857 set_user_nice(lo->worker_task, MIN_NICE); in loop_prepare_queue()
861 static int loop_set_fd(struct loop_device *lo, fmode_t mode, in loop_set_fd() argument
881 if (lo->lo_state != Lo_unbound) in loop_set_fd()
915 size = get_loop_size(lo, file); in loop_set_fd()
918 error = loop_prepare_queue(lo); in loop_set_fd()
926 lo->use_dio = false; in loop_set_fd()
927 lo->lo_blocksize = lo_blocksize; in loop_set_fd()
928 lo->lo_device = bdev; in loop_set_fd()
929 lo->lo_flags = lo_flags; in loop_set_fd()
930 lo->lo_backing_file = file; in loop_set_fd()
931 lo->transfer = NULL; in loop_set_fd()
932 lo->ioctl = NULL; in loop_set_fd()
933 lo->lo_sizelimit = 0; in loop_set_fd()
934 lo->old_gfp_mask = mapping_gfp_mask(mapping); in loop_set_fd()
935 mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS)); in loop_set_fd()
938 blk_queue_write_cache(lo->lo_queue, true, false); in loop_set_fd()
940 loop_update_dio(lo); in loop_set_fd()
941 set_capacity(lo->lo_disk, size); in loop_set_fd()
943 loop_sysfs_init(lo); in loop_set_fd()
949 lo->lo_state = Lo_bound; in loop_set_fd()
951 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_set_fd()
952 if (lo->lo_flags & LO_FLAGS_PARTSCAN) in loop_set_fd()
953 loop_reread_partitions(lo, bdev); in loop_set_fd()
970 loop_release_xfer(struct loop_device *lo) in loop_release_xfer() argument
973 struct loop_func_table *xfer = lo->lo_encryption; in loop_release_xfer()
977 err = xfer->release(lo); in loop_release_xfer()
978 lo->transfer = NULL; in loop_release_xfer()
979 lo->lo_encryption = NULL; in loop_release_xfer()
986 loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer, in loop_init_xfer() argument
997 err = xfer->init(lo, i); in loop_init_xfer()
1001 lo->lo_encryption = xfer; in loop_init_xfer()
1006 static int loop_clr_fd(struct loop_device *lo) in loop_clr_fd() argument
1008 struct file *filp = lo->lo_backing_file; in loop_clr_fd()
1009 gfp_t gfp = lo->old_gfp_mask; in loop_clr_fd()
1010 struct block_device *bdev = lo->lo_device; in loop_clr_fd()
1012 if (lo->lo_state != Lo_bound) in loop_clr_fd()
1025 if (atomic_read(&lo->lo_refcnt) > 1) { in loop_clr_fd()
1026 lo->lo_flags |= LO_FLAGS_AUTOCLEAR; in loop_clr_fd()
1027 mutex_unlock(&lo->lo_ctl_mutex); in loop_clr_fd()
1035 blk_mq_freeze_queue(lo->lo_queue); in loop_clr_fd()
1037 spin_lock_irq(&lo->lo_lock); in loop_clr_fd()
1038 lo->lo_state = Lo_rundown; in loop_clr_fd()
1039 lo->lo_backing_file = NULL; in loop_clr_fd()
1040 spin_unlock_irq(&lo->lo_lock); in loop_clr_fd()
1042 loop_release_xfer(lo); in loop_clr_fd()
1043 lo->transfer = NULL; in loop_clr_fd()
1044 lo->ioctl = NULL; in loop_clr_fd()
1045 lo->lo_device = NULL; in loop_clr_fd()
1046 lo->lo_encryption = NULL; in loop_clr_fd()
1047 lo->lo_offset = 0; in loop_clr_fd()
1048 lo->lo_sizelimit = 0; in loop_clr_fd()
1049 lo->lo_encrypt_key_size = 0; in loop_clr_fd()
1050 memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE); in loop_clr_fd()
1051 memset(lo->lo_crypt_name, 0, LO_NAME_SIZE); in loop_clr_fd()
1052 memset(lo->lo_file_name, 0, LO_NAME_SIZE); in loop_clr_fd()
1057 set_capacity(lo->lo_disk, 0); in loop_clr_fd()
1058 loop_sysfs_exit(lo); in loop_clr_fd()
1065 lo->lo_state = Lo_unbound; in loop_clr_fd()
1068 blk_mq_unfreeze_queue(lo->lo_queue); in loop_clr_fd()
1070 if (lo->lo_flags & LO_FLAGS_PARTSCAN && bdev) in loop_clr_fd()
1071 loop_reread_partitions(lo, bdev); in loop_clr_fd()
1072 lo->lo_flags = 0; in loop_clr_fd()
1074 lo->lo_disk->flags |= GENHD_FL_NO_PART_SCAN; in loop_clr_fd()
1075 loop_unprepare_queue(lo); in loop_clr_fd()
1076 mutex_unlock(&lo->lo_ctl_mutex); in loop_clr_fd()
1088 loop_set_status(struct loop_device *lo, const struct loop_info64 *info) in loop_set_status() argument
1094 if (lo->lo_encrypt_key_size && in loop_set_status()
1095 !uid_eq(lo->lo_key_owner, uid) && in loop_set_status()
1098 if (lo->lo_state != Lo_bound) in loop_set_status()
1104 blk_mq_freeze_queue(lo->lo_queue); in loop_set_status()
1106 err = loop_release_xfer(lo); in loop_set_status()
1125 err = loop_init_xfer(lo, xfer, info); in loop_set_status()
1129 if (lo->lo_offset != info->lo_offset || in loop_set_status()
1130 lo->lo_sizelimit != info->lo_sizelimit) in loop_set_status()
1131 if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) { in loop_set_status()
1136 loop_config_discard(lo); in loop_set_status()
1138 memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE); in loop_set_status()
1139 memcpy(lo->lo_crypt_name, info->lo_crypt_name, LO_NAME_SIZE); in loop_set_status()
1140 lo->lo_file_name[LO_NAME_SIZE-1] = 0; in loop_set_status()
1141 lo->lo_crypt_name[LO_NAME_SIZE-1] = 0; in loop_set_status()
1145 lo->transfer = xfer->transfer; in loop_set_status()
1146 lo->ioctl = xfer->ioctl; in loop_set_status()
1148 if ((lo->lo_flags & LO_FLAGS_AUTOCLEAR) != in loop_set_status()
1150 lo->lo_flags ^= LO_FLAGS_AUTOCLEAR; in loop_set_status()
1152 lo->lo_encrypt_key_size = info->lo_encrypt_key_size; in loop_set_status()
1153 lo->lo_init[0] = info->lo_init[0]; in loop_set_status()
1154 lo->lo_init[1] = info->lo_init[1]; in loop_set_status()
1156 memcpy(lo->lo_encrypt_key, info->lo_encrypt_key, in loop_set_status()
1158 lo->lo_key_owner = uid; in loop_set_status()
1162 __loop_update_dio(lo, lo->use_dio); in loop_set_status()
1165 blk_mq_unfreeze_queue(lo->lo_queue); in loop_set_status()
1168 !(lo->lo_flags & LO_FLAGS_PARTSCAN)) { in loop_set_status()
1169 lo->lo_flags |= LO_FLAGS_PARTSCAN; in loop_set_status()
1170 lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; in loop_set_status()
1171 loop_reread_partitions(lo, lo->lo_device); in loop_set_status()
1178 loop_get_status(struct loop_device *lo, struct loop_info64 *info) in loop_get_status() argument
1180 struct file *file = lo->lo_backing_file; in loop_get_status()
1184 if (lo->lo_state != Lo_bound) in loop_get_status()
1190 info->lo_number = lo->lo_number; in loop_get_status()
1193 info->lo_rdevice = huge_encode_dev(lo->lo_device ? stat.rdev : stat.dev); in loop_get_status()
1194 info->lo_offset = lo->lo_offset; in loop_get_status()
1195 info->lo_sizelimit = lo->lo_sizelimit; in loop_get_status()
1196 info->lo_flags = lo->lo_flags; in loop_get_status()
1197 memcpy(info->lo_file_name, lo->lo_file_name, LO_NAME_SIZE); in loop_get_status()
1198 memcpy(info->lo_crypt_name, lo->lo_crypt_name, LO_NAME_SIZE); in loop_get_status()
1200 lo->lo_encryption ? lo->lo_encryption->number : 0; in loop_get_status()
1201 if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) { in loop_get_status()
1202 info->lo_encrypt_key_size = lo->lo_encrypt_key_size; in loop_get_status()
1203 memcpy(info->lo_encrypt_key, lo->lo_encrypt_key, in loop_get_status()
1204 lo->lo_encrypt_key_size); in loop_get_status()
1262 loop_set_status_old(struct loop_device *lo, const struct loop_info __user *arg) in loop_set_status_old() argument
1270 return loop_set_status(lo, &info64); in loop_set_status_old()
1274 loop_set_status64(struct loop_device *lo, const struct loop_info64 __user *arg) in loop_set_status64() argument
1280 return loop_set_status(lo, &info64); in loop_set_status64()
1284 loop_get_status_old(struct loop_device *lo, struct loop_info __user *arg) { in loop_get_status_old() argument
1292 err = loop_get_status(lo, &info64); in loop_get_status_old()
1302 loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) { in loop_get_status64() argument
1309 err = loop_get_status(lo, &info64); in loop_get_status64()
1316 static int loop_set_capacity(struct loop_device *lo, struct block_device *bdev) in loop_set_capacity() argument
1318 if (unlikely(lo->lo_state != Lo_bound)) in loop_set_capacity()
1321 return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit); in loop_set_capacity()
1324 static int loop_set_dio(struct loop_device *lo, unsigned long arg) in loop_set_dio() argument
1327 if (lo->lo_state != Lo_bound) in loop_set_dio()
1330 __loop_update_dio(lo, !!arg); in loop_set_dio()
1331 if (lo->use_dio == !!arg) in loop_set_dio()
1341 struct loop_device *lo = bdev->bd_disk->private_data; in lo_ioctl() local
1344 mutex_lock_nested(&lo->lo_ctl_mutex, 1); in lo_ioctl()
1347 err = loop_set_fd(lo, mode, bdev, arg); in lo_ioctl()
1350 err = loop_change_fd(lo, bdev, arg); in lo_ioctl()
1354 err = loop_clr_fd(lo); in lo_ioctl()
1361 err = loop_set_status_old(lo, in lo_ioctl()
1365 err = loop_get_status_old(lo, (struct loop_info __user *) arg); in lo_ioctl()
1370 err = loop_set_status64(lo, in lo_ioctl()
1374 err = loop_get_status64(lo, (struct loop_info64 __user *) arg); in lo_ioctl()
1379 err = loop_set_capacity(lo, bdev); in lo_ioctl()
1384 err = loop_set_dio(lo, arg); in lo_ioctl()
1387 err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL; in lo_ioctl()
1389 mutex_unlock(&lo->lo_ctl_mutex); in lo_ioctl()
1486 loop_set_status_compat(struct loop_device *lo, in loop_set_status_compat() argument
1495 return loop_set_status(lo, &info64); in loop_set_status_compat()
1499 loop_get_status_compat(struct loop_device *lo, in loop_get_status_compat() argument
1508 err = loop_get_status(lo, &info64); in loop_get_status_compat()
1517 struct loop_device *lo = bdev->bd_disk->private_data; in lo_compat_ioctl() local
1522 mutex_lock(&lo->lo_ctl_mutex); in lo_compat_ioctl()
1524 lo, (const struct compat_loop_info __user *) arg); in lo_compat_ioctl()
1525 mutex_unlock(&lo->lo_ctl_mutex); in lo_compat_ioctl()
1528 mutex_lock(&lo->lo_ctl_mutex); in lo_compat_ioctl()
1530 lo, (struct compat_loop_info __user *) arg); in lo_compat_ioctl()
1531 mutex_unlock(&lo->lo_ctl_mutex); in lo_compat_ioctl()
1552 struct loop_device *lo; in lo_open() local
1556 lo = bdev->bd_disk->private_data; in lo_open()
1557 if (!lo) { in lo_open()
1562 atomic_inc(&lo->lo_refcnt); in lo_open()
1568 static void __lo_release(struct loop_device *lo) in __lo_release() argument
1572 if (atomic_dec_return(&lo->lo_refcnt)) in __lo_release()
1575 mutex_lock(&lo->lo_ctl_mutex); in __lo_release()
1576 if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) { in __lo_release()
1581 err = loop_clr_fd(lo); in __lo_release()
1589 loop_flush(lo); in __lo_release()
1592 mutex_unlock(&lo->lo_ctl_mutex); in __lo_release()
1635 struct loop_device *lo = ptr; in unregister_transfer_cb() local
1638 mutex_lock(&lo->lo_ctl_mutex); in unregister_transfer_cb()
1639 if (lo->lo_encryption == xfer) in unregister_transfer_cb()
1640 loop_release_xfer(lo); in unregister_transfer_cb()
1641 mutex_unlock(&lo->lo_ctl_mutex); in unregister_transfer_cb()
1665 struct loop_device *lo = cmd->rq->q->queuedata; in loop_queue_rq() local
1669 if (lo->lo_state != Lo_bound) in loop_queue_rq()
1678 cmd->use_aio = lo->use_dio; in loop_queue_rq()
1682 kthread_queue_work(&lo->worker, &cmd->work); in loop_queue_rq()
1690 struct loop_device *lo = cmd->rq->q->queuedata; in loop_handle_cmd() local
1693 if (write && (lo->lo_flags & LO_FLAGS_READ_ONLY)) { in loop_handle_cmd()
1698 ret = do_req_filebacked(lo, cmd->rq); in loop_handle_cmd()
1732 struct loop_device *lo; in loop_add() local
1737 lo = kzalloc(sizeof(*lo), GFP_KERNEL); in loop_add()
1738 if (!lo) in loop_add()
1741 lo->lo_state = Lo_unbound; in loop_add()
1745 err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL); in loop_add()
1749 err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL); in loop_add()
1756 lo->tag_set.ops = &loop_mq_ops; in loop_add()
1757 lo->tag_set.nr_hw_queues = 1; in loop_add()
1758 lo->tag_set.queue_depth = 128; in loop_add()
1759 lo->tag_set.numa_node = NUMA_NO_NODE; in loop_add()
1760 lo->tag_set.cmd_size = sizeof(struct loop_cmd); in loop_add()
1761 lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE; in loop_add()
1762 lo->tag_set.driver_data = lo; in loop_add()
1764 err = blk_mq_alloc_tag_set(&lo->tag_set); in loop_add()
1768 lo->lo_queue = blk_mq_init_queue(&lo->tag_set); in loop_add()
1769 if (IS_ERR_OR_NULL(lo->lo_queue)) { in loop_add()
1770 err = PTR_ERR(lo->lo_queue); in loop_add()
1773 lo->lo_queue->queuedata = lo; in loop_add()
1779 queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, lo->lo_queue); in loop_add()
1782 disk = lo->lo_disk = alloc_disk(1 << part_shift); in loop_add()
1807 mutex_init(&lo->lo_ctl_mutex); in loop_add()
1808 atomic_set(&lo->lo_refcnt, 0); in loop_add()
1809 lo->lo_number = i; in loop_add()
1810 spin_lock_init(&lo->lo_lock); in loop_add()
1814 disk->private_data = lo; in loop_add()
1815 disk->queue = lo->lo_queue; in loop_add()
1818 *l = lo; in loop_add()
1819 return lo->lo_number; in loop_add()
1822 blk_cleanup_queue(lo->lo_queue); in loop_add()
1824 blk_mq_free_tag_set(&lo->tag_set); in loop_add()
1828 kfree(lo); in loop_add()
1833 static void loop_remove(struct loop_device *lo) in loop_remove() argument
1835 blk_cleanup_queue(lo->lo_queue); in loop_remove()
1836 del_gendisk(lo->lo_disk); in loop_remove()
1837 blk_mq_free_tag_set(&lo->tag_set); in loop_remove()
1838 put_disk(lo->lo_disk); in loop_remove()
1839 kfree(lo); in loop_remove()
1844 struct loop_device *lo = ptr; in find_free_cb() local
1847 if (lo->lo_state == Lo_unbound) { in find_free_cb()
1848 *l = lo; in find_free_cb()
1856 struct loop_device *lo; in loop_lookup() local
1862 err = idr_for_each(&loop_index_idr, &find_free_cb, &lo); in loop_lookup()
1864 *l = lo; in loop_lookup()
1865 ret = lo->lo_number; in loop_lookup()
1871 lo = idr_find(&loop_index_idr, i); in loop_lookup()
1872 if (lo) { in loop_lookup()
1873 *l = lo; in loop_lookup()
1874 ret = lo->lo_number; in loop_lookup()
1882 struct loop_device *lo; in loop_probe() local
1887 err = loop_lookup(&lo, MINOR(dev) >> part_shift); in loop_probe()
1889 err = loop_add(&lo, MINOR(dev) >> part_shift); in loop_probe()
1893 kobj = get_disk(lo->lo_disk); in loop_probe()
1903 struct loop_device *lo; in loop_control_ioctl() local
1909 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
1914 ret = loop_add(&lo, parm); in loop_control_ioctl()
1917 ret = loop_lookup(&lo, parm); in loop_control_ioctl()
1920 mutex_lock(&lo->lo_ctl_mutex); in loop_control_ioctl()
1921 if (lo->lo_state != Lo_unbound) { in loop_control_ioctl()
1923 mutex_unlock(&lo->lo_ctl_mutex); in loop_control_ioctl()
1926 if (atomic_read(&lo->lo_refcnt) > 0) { in loop_control_ioctl()
1928 mutex_unlock(&lo->lo_ctl_mutex); in loop_control_ioctl()
1931 lo->lo_disk->private_data = NULL; in loop_control_ioctl()
1932 mutex_unlock(&lo->lo_ctl_mutex); in loop_control_ioctl()
1933 idr_remove(&loop_index_idr, lo->lo_number); in loop_control_ioctl()
1934 loop_remove(lo); in loop_control_ioctl()
1937 ret = loop_lookup(&lo, -1); in loop_control_ioctl()
1940 ret = loop_add(&lo, -1); in loop_control_ioctl()
1968 struct loop_device *lo; in loop_init() local
2027 loop_add(&lo, i); in loop_init()
2040 struct loop_device *lo = ptr; in loop_exit_cb() local
2042 loop_remove(lo); in loop_exit_cb()