Lines Matching +full:suspend +full:- +full:to +full:- +full:disk
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
8 #include "dm-core.h"
9 #include "dm-rq.h"
10 #include "dm-uevent.h"
30 #include <linux/blk-crypto.h>
66 * One of these is allocated (on-stack) per original bio.
111 if (!tio->inside_dm_io) in dm_per_bio_data()
112 return (char *)bio - offsetof(struct dm_target_io, clone) - data_size; in dm_per_bio_data()
113 …return (char *)bio - offsetof(struct dm_target_io, clone) - offsetof(struct dm_io, tio) - data_siz… in dm_per_bio_data()
120 if (io->magic == DM_IO_MAGIC) in dm_bio_from_per_bio_data()
122 BUG_ON(io->magic != DM_TIO_MAGIC); in dm_bio_from_per_bio_data()
129 return container_of(bio, struct dm_target_io, clone)->target_bio_nr; in dm_bio_get_target_bio_nr()
133 #define MINOR_ALLOCED ((void *)-1)
136 * Bits for the md->flags field.
162 * For mempools pre-allocation at the table loading time.
176 * Bio-based DM's mempools' reserved IOs set by the user.
231 DM_NUMA_NODE, num_online_nodes() - 1); in dm_get_numa_node()
244 r = -ENOMEM; in local_init()
315 while (i--) in dm_init()
325 while (i--) in dm_exit()
339 return test_bit(DMF_DELETING, &md->flags); in dm_deleting_md()
348 md = bdev->bd_disk->private_data; in dm_blk_open()
352 if (test_bit(DMF_FREEING, &md->flags) || in dm_blk_open()
359 atomic_inc(&md->open_count); in dm_blk_open()
363 return md ? 0 : -ENXIO; in dm_blk_open()
366 static void dm_blk_close(struct gendisk *disk, fmode_t mode) in dm_blk_close() argument
372 md = disk->private_data; in dm_blk_close()
376 if (atomic_dec_and_test(&md->open_count) && in dm_blk_close()
377 (test_bit(DMF_DEFERRED_REMOVE, &md->flags))) in dm_blk_close()
387 return atomic_read(&md->open_count); in dm_open_count()
400 r = -EBUSY; in dm_lock_for_deletion()
402 set_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_lock_for_deletion()
403 } else if (only_deferred && !test_bit(DMF_DEFERRED_REMOVE, &md->flags)) in dm_lock_for_deletion()
404 r = -EEXIST; in dm_lock_for_deletion()
406 set_bit(DMF_DELETING, &md->flags); in dm_lock_for_deletion()
419 if (test_bit(DMF_DELETING, &md->flags)) in dm_cancel_deferred_remove()
420 r = -EBUSY; in dm_cancel_deferred_remove()
422 clear_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_cancel_deferred_remove()
436 struct mapped_device *md = bdev->bd_disk->private_data; in dm_blk_getgeo()
445 sector_t sector_diff = args->tgt->begin - args->start; in dm_report_zones_cb()
450 if (zone->start >= args->start + args->tgt->len) in dm_report_zones_cb()
455 * to match its position in the target range. in dm_report_zones_cb()
457 zone->start += sector_diff; in dm_report_zones_cb()
458 if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) { in dm_report_zones_cb()
459 if (zone->cond == BLK_ZONE_COND_FULL) in dm_report_zones_cb()
460 zone->wp = zone->start + zone->len; in dm_report_zones_cb()
461 else if (zone->cond == BLK_ZONE_COND_EMPTY) in dm_report_zones_cb()
462 zone->wp = zone->start; in dm_report_zones_cb()
464 zone->wp += sector_diff; in dm_report_zones_cb()
467 args->next_sector = zone->start + zone->len; in dm_report_zones_cb()
468 return args->orig_cb(zone, args->zone_idx++, args->orig_data); in dm_report_zones_cb()
472 static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, in dm_blk_report_zones() argument
475 struct mapped_device *md = disk->private_data; in dm_blk_report_zones()
485 return -EAGAIN; in dm_blk_report_zones()
489 ret = -EIO; in dm_blk_report_zones()
497 if (WARN_ON_ONCE(!tgt->type->report_zones)) { in dm_blk_report_zones()
498 ret = -EIO; in dm_blk_report_zones()
503 ret = tgt->type->report_zones(tgt, &args, in dm_blk_report_zones()
504 nr_zones - args.zone_idx); in dm_blk_report_zones()
508 args.next_sector < get_capacity(disk)); in dm_blk_report_zones()
527 r = -ENOTTY; in dm_prepare_ioctl()
537 if (!tgt->type->prepare_ioctl) in dm_prepare_ioctl()
541 return -EAGAIN; in dm_prepare_ioctl()
543 r = tgt->type->prepare_ioctl(tgt, bdev); in dm_prepare_ioctl()
544 if (r == -ENOTCONN && !fatal_signal_pending(current)) { in dm_prepare_ioctl()
561 struct mapped_device *md = bdev->bd_disk->private_data; in dm_blk_ioctl()
575 "%s: sending ioctl %x to DM device without required privilege.", in dm_blk_ioctl()
576 current->comm, cmd); in dm_blk_ioctl()
577 r = -ENOIOCTLCMD; in dm_blk_ioctl()
591 struct dm_io *io = tio->io; in dm_start_time_ns_from_clone()
593 return jiffies_to_nsecs(io->start_time); in dm_start_time_ns_from_clone()
599 struct mapped_device *md = io->md; in start_io_acct()
600 struct bio *bio = io->orig_bio; in start_io_acct()
602 io->start_time = bio_start_io_acct(bio); in start_io_acct()
603 if (unlikely(dm_stats_used(&md->stats))) in start_io_acct()
604 dm_stats_account_io(&md->stats, bio_data_dir(bio), in start_io_acct()
605 bio->bi_iter.bi_sector, bio_sectors(bio), in start_io_acct()
606 false, 0, &io->stats_aux); in start_io_acct()
612 unsigned long duration = jiffies - start_time; in end_io_acct()
614 if (unlikely(dm_stats_used(&md->stats))) in end_io_acct()
615 dm_stats_account_io(&md->stats, bio_data_dir(bio), in end_io_acct()
616 bio->bi_iter.bi_sector, bio_sectors(bio), in end_io_acct()
623 /* nudge anyone waiting on suspend queue */ in end_io_acct()
624 if (unlikely(wq_has_sleeper(&md->wait))) in end_io_acct()
625 wake_up(&md->wait); in end_io_acct()
634 clone = bio_alloc_bioset(GFP_NOIO, 0, &md->io_bs); in alloc_io()
639 tio->inside_dm_io = true; in alloc_io()
640 tio->io = NULL; in alloc_io()
643 io->magic = DM_IO_MAGIC; in alloc_io()
644 io->status = 0; in alloc_io()
645 atomic_set(&io->io_count, 1); in alloc_io()
646 io->orig_bio = bio; in alloc_io()
647 io->md = md; in alloc_io()
648 spin_lock_init(&io->endio_lock); in alloc_io()
657 bio_put(&io->tio.clone); in free_io()
665 if (!ci->io->tio.io) { in alloc_tio()
666 /* the dm_target_io embedded in ci->io is available */ in alloc_tio()
667 tio = &ci->io->tio; in alloc_tio()
669 struct bio *clone = bio_alloc_bioset(gfp_mask, 0, &ci->io->md->bs); in alloc_tio()
674 tio->inside_dm_io = false; in alloc_tio()
677 tio->magic = DM_TIO_MAGIC; in alloc_tio()
678 tio->io = ci->io; in alloc_tio()
679 tio->ti = ti; in alloc_tio()
680 tio->target_bio_nr = target_bio_nr; in alloc_tio()
687 if (tio->inside_dm_io) in free_tio()
689 bio_put(&tio->clone); in free_tio()
693 * Add the bio to the list of deferred io.
699 spin_lock_irqsave(&md->deferred_lock, flags); in queue_io()
700 bio_list_add(&md->deferred, bio); in queue_io()
701 spin_unlock_irqrestore(&md->deferred_lock, flags); in queue_io()
702 queue_work(md->wq, &md->work); in queue_io()
707 * function to access the md->map field, and make sure they call
710 struct dm_table *dm_get_live_table(struct mapped_device *md, int *srcu_idx) __acquires(md->io_barri… in dm_get_live_table()
712 *srcu_idx = srcu_read_lock(&md->io_barrier); in dm_get_live_table()
714 return srcu_dereference(md->map, &md->io_barrier); in dm_get_live_table()
717 void dm_put_live_table(struct mapped_device *md, int srcu_idx) __releases(md->io_barrier) in dm_put_live_table()
719 srcu_read_unlock(&md->io_barrier, srcu_idx); in dm_put_live_table()
724 synchronize_srcu(&md->io_barrier); in dm_sync_table()
729 * A fast alternative to dm_get_live_table/dm_put_live_table.
735 return rcu_dereference(md->map); in dm_get_live_table_fast()
743 static char *_dm_claim_ptr = "I belong to device-mapper";
755 BUG_ON(td->dm_dev.bdev); in open_table_device()
757 bdev = blkdev_get_by_dev(dev, td->dm_dev.mode | FMODE_EXCL, _dm_claim_ptr); in open_table_device()
763 blkdev_put(bdev, td->dm_dev.mode | FMODE_EXCL); in open_table_device()
767 td->dm_dev.bdev = bdev; in open_table_device()
768 td->dm_dev.dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); in open_table_device()
777 if (!td->dm_dev.bdev) in close_table_device()
780 bd_unlink_disk_holder(td->dm_dev.bdev, dm_disk(md)); in close_table_device()
781 blkdev_put(td->dm_dev.bdev, td->dm_dev.mode | FMODE_EXCL); in close_table_device()
782 put_dax(td->dm_dev.dax_dev); in close_table_device()
783 td->dm_dev.bdev = NULL; in close_table_device()
784 td->dm_dev.dax_dev = NULL; in close_table_device()
793 if (td->dm_dev.bdev->bd_dev == dev && td->dm_dev.mode == mode) in find_table_device()
805 mutex_lock(&md->table_devices_lock); in dm_get_table_device()
806 td = find_table_device(&md->table_devices, dev, mode); in dm_get_table_device()
808 td = kmalloc_node(sizeof(*td), GFP_KERNEL, md->numa_node_id); in dm_get_table_device()
810 mutex_unlock(&md->table_devices_lock); in dm_get_table_device()
811 return -ENOMEM; in dm_get_table_device()
814 td->dm_dev.mode = mode; in dm_get_table_device()
815 td->dm_dev.bdev = NULL; in dm_get_table_device()
818 mutex_unlock(&md->table_devices_lock); in dm_get_table_device()
823 format_dev_t(td->dm_dev.name, dev); in dm_get_table_device()
825 refcount_set(&td->count, 1); in dm_get_table_device()
826 list_add(&td->list, &md->table_devices); in dm_get_table_device()
828 refcount_inc(&td->count); in dm_get_table_device()
830 mutex_unlock(&md->table_devices_lock); in dm_get_table_device()
832 *result = &td->dm_dev; in dm_get_table_device()
841 mutex_lock(&md->table_devices_lock); in dm_put_table_device()
842 if (refcount_dec_and_test(&td->count)) { in dm_put_table_device()
844 list_del(&td->list); in dm_put_table_device()
847 mutex_unlock(&md->table_devices_lock); in dm_put_table_device()
859 td->dm_dev.name, refcount_read(&td->count)); in free_table_devices()
869 *geo = md->geometry; in dm_get_geometry()
879 sector_t sz = (sector_t)geo->cylinders * geo->heads * geo->sectors; in dm_set_geometry()
881 if (geo->start > sz) { in dm_set_geometry()
883 return -EINVAL; in dm_set_geometry()
886 md->geometry = *geo; in dm_set_geometry()
893 return test_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __noflush_suspending()
905 struct mapped_device *md = io->md; in dec_pending()
909 /* Push-back supersedes any I/O errors */ in dec_pending()
911 spin_lock_irqsave(&io->endio_lock, flags); in dec_pending()
912 if (!(io->status == BLK_STS_DM_REQUEUE && __noflush_suspending(md))) in dec_pending()
913 io->status = error; in dec_pending()
914 spin_unlock_irqrestore(&io->endio_lock, flags); in dec_pending()
917 if (atomic_dec_and_test(&io->io_count)) { in dec_pending()
918 if (io->status == BLK_STS_DM_REQUEUE) { in dec_pending()
922 spin_lock_irqsave(&md->deferred_lock, flags); in dec_pending()
924 /* NOTE early return due to BLK_STS_DM_REQUEUE below */ in dec_pending()
925 bio_list_add_head(&md->deferred, io->orig_bio); in dec_pending()
927 /* noflush suspend was interrupted. */ in dec_pending()
928 io->status = BLK_STS_IOERR; in dec_pending()
929 spin_unlock_irqrestore(&md->deferred_lock, flags); in dec_pending()
932 io_error = io->status; in dec_pending()
933 bio = io->orig_bio; in dec_pending()
934 start_time = io->start_time; in dec_pending()
935 stats_aux = io->stats_aux; in dec_pending()
942 if ((bio->bi_opf & REQ_PREFLUSH) && bio->bi_iter.bi_size) { in dec_pending()
947 bio->bi_opf &= ~REQ_PREFLUSH; in dec_pending()
952 bio->bi_status = io_error; in dec_pending()
963 limits->max_discard_sectors = 0; in disable_discard()
964 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, md->queue); in disable_discard()
972 limits->max_write_same_sectors = 0; in disable_write_same()
980 limits->max_write_zeroes_sectors = 0; in disable_write_zeroes()
985 return unlikely((bio->bi_opf & REQ_SWAP) != 0) && unlikely(ti->limit_swap_bios); in swap_bios_limit()
990 blk_status_t error = bio->bi_status; in clone_endio()
992 struct dm_io *io = tio->io; in clone_endio()
993 struct mapped_device *md = tio->io->md; in clone_endio()
994 dm_endio_fn endio = tio->ti->type->end_io; in clone_endio()
995 struct bio *orig_bio = io->orig_bio; in clone_endio()
999 !bio->bi_disk->queue->limits.max_discard_sectors) in clone_endio()
1002 !bio->bi_disk->queue->limits.max_write_same_sectors) in clone_endio()
1005 !bio->bi_disk->queue->limits.max_write_zeroes_sectors) in clone_endio()
1010 * For zone-append bios get offset in zone of the written in clone_endio()
1011 * sector and add that to the original bio sector pos. in clone_endio()
1014 sector_t written_sector = bio->bi_iter.bi_sector; in clone_endio()
1015 struct request_queue *q = orig_bio->bi_disk->queue; in clone_endio()
1016 u64 mask = (u64)blk_queue_zone_sectors(q) - 1; in clone_endio()
1018 orig_bio->bi_iter.bi_sector += written_sector & mask; in clone_endio()
1022 int r = endio(tio->ti, bio, &error); in clone_endio()
1038 if (unlikely(swap_bios_limit(tio->ti, bio))) { in clone_endio()
1039 struct mapped_device *md = io->md; in clone_endio()
1040 up(&md->swap_bios_semaphore); in clone_endio()
1048 * Return maximum size of I/O possible at the supplied sector up to the current
1054 return ti->len - target_offset; in max_io_len_target_boundary()
1064 * Does the target need to split IO even further? in max_io_len()
1065 * - varied (per target) IO splitting is a tenet of DM; this in max_io_len()
1068 * ti->max_io_len to override stacked chunk_sectors. in max_io_len()
1070 if (ti->max_io_len) { in max_io_len()
1071 max_len = blk_max_size_offset(ti->table->md->queue, in max_io_len()
1072 target_offset, ti->max_io_len); in max_io_len()
1085 ti->error = "Maximum size of target IO is too large"; in dm_set_target_max_io_len()
1086 return -EINVAL; in dm_set_target_max_io_len()
1089 ti->max_io_len = (uint32_t) len; in dm_set_target_max_io_len()
1097 __acquires(md->io_barrier) in dm_dax_get_live_target()
1119 long len, ret = -EIO; in dm_dax_direct_access()
1126 if (!ti->type->direct_access) in dm_dax_direct_access()
1132 ret = ti->type->direct_access(ti, pgoff, nr_pages, kaddr, pfn); in dm_dax_direct_access()
1173 if (!ti->type->dax_copy_from_iter) { in dm_dax_copy_from_iter()
1177 ret = ti->type->dax_copy_from_iter(ti, pgoff, addr, bytes, i); in dm_dax_copy_from_iter()
1197 if (!ti->type->dax_copy_to_iter) { in dm_dax_copy_to_iter()
1201 ret = ti->type->dax_copy_to_iter(ti, pgoff, addr, bytes, i); in dm_dax_copy_to_iter()
1214 int ret = -EIO; in dm_dax_zero_page_range()
1221 if (WARN_ON(!ti->type->dax_zero_page_range)) { in dm_dax_zero_page_range()
1223 * ->zero_page_range() is mandatory dax operation. If we are in dm_dax_zero_page_range()
1228 ret = ti->type->dax_zero_page_range(ti, pgoff, nr_pages); in dm_dax_zero_page_range()
1240 * dm_accept_partial_bio informs the dm that the target only wants to process
1245 * +--------------------+---------------+-------+
1247 * +--------------------+---------------+-------+
1249 * <-------------- *tio->len_ptr --------------->
1250 * <------- bi_size ------->
1251 * <-- n_sectors -->
1255 * Region 2 is the remaining bio size that the target wants to process.
1256 * (it may be empty if region 1 is non-empty, although there is no reason
1257 * to make it empty)
1258 * The target requires that region 3 is to be sent in the next bio.
1260 * If the target wants to receive multiple copies of the bio (via num_*bios, etc),
1267 unsigned bi_size = bio->bi_iter.bi_size >> SECTOR_SHIFT; in dm_accept_partial_bio()
1269 BUG_ON(bio->bi_opf & REQ_PREFLUSH); in dm_accept_partial_bio()
1272 BUG_ON(bi_size > *tio->len_ptr); in dm_accept_partial_bio()
1275 *tio->len_ptr -= bi_size - n_sectors; in dm_accept_partial_bio()
1276 bio->bi_iter.bi_size = n_sectors << SECTOR_SHIFT; in dm_accept_partial_bio()
1282 mutex_lock(&md->swap_bios_lock); in __set_swap_bios_limit()
1283 while (latch < md->swap_bios) { in __set_swap_bios_limit()
1285 down(&md->swap_bios_semaphore); in __set_swap_bios_limit()
1286 md->swap_bios--; in __set_swap_bios_limit()
1288 while (latch > md->swap_bios) { in __set_swap_bios_limit()
1290 up(&md->swap_bios_semaphore); in __set_swap_bios_limit()
1291 md->swap_bios++; in __set_swap_bios_limit()
1293 mutex_unlock(&md->swap_bios_lock); in __set_swap_bios_limit()
1300 struct bio *clone = &tio->clone; in __map_bio()
1301 struct dm_io *io = tio->io; in __map_bio()
1302 struct dm_target *ti = tio->ti; in __map_bio()
1305 clone->bi_end_io = clone_endio; in __map_bio()
1308 * Map the clone. If r == 0 we don't need to do in __map_bio()
1312 atomic_inc(&io->io_count); in __map_bio()
1313 sector = clone->bi_iter.bi_sector; in __map_bio()
1316 struct mapped_device *md = io->md; in __map_bio()
1318 if (unlikely(latch != md->swap_bios)) in __map_bio()
1320 down(&md->swap_bios_semaphore); in __map_bio()
1323 r = ti->type->map(ti, clone); in __map_bio()
1329 trace_block_bio_remap(clone->bi_disk->queue, clone, in __map_bio()
1330 bio_dev(io->orig_bio), sector); in __map_bio()
1335 struct mapped_device *md = io->md; in __map_bio()
1336 up(&md->swap_bios_semaphore); in __map_bio()
1343 struct mapped_device *md = io->md; in __map_bio()
1344 up(&md->swap_bios_semaphore); in __map_bio()
1359 bio->bi_iter.bi_sector = sector; in bio_setup_sector()
1360 bio->bi_iter.bi_size = to_bytes(len); in bio_setup_sector()
1369 struct bio *clone = &tio->clone; in clone_bio()
1379 if (unlikely(!dm_target_has_integrity(tio->ti->type) && in clone_bio()
1380 !dm_target_passes_integrity(tio->ti->type))) { in clone_bio()
1382 dm_device_name(tio->io->md), in clone_bio()
1383 tio->ti->type->name); in clone_bio()
1384 return -EIO; in clone_bio()
1392 bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector)); in clone_bio()
1393 clone->bi_iter.bi_size = to_bytes(len); in clone_bio()
1412 bio_list_add(blist, &tio->clone); in alloc_multiple_bios()
1421 mutex_lock(&ci->io->md->table_devices_lock); in alloc_multiple_bios()
1427 bio_list_add(blist, &tio->clone); in alloc_multiple_bios()
1430 mutex_unlock(&ci->io->md->table_devices_lock); in alloc_multiple_bios()
1444 struct bio *clone = &tio->clone; in __clone_and_map_simple_bio()
1446 tio->len_ptr = len; in __clone_and_map_simple_bio()
1448 __bio_clone_fast(clone, ci->bio); in __clone_and_map_simple_bio()
1450 bio_setup_sector(clone, ci->sector, *len); in __clone_and_map_simple_bio()
1477 * Use an on-stack bio for this, it's safe since we don't in __send_empty_flush()
1478 * need to reference it after submit. It's just used as in __send_empty_flush()
1483 ci->bio = &flush_bio; in __send_empty_flush()
1484 ci->sector_count = 0; in __send_empty_flush()
1493 bio_set_dev(ci->bio, ci->io->md->bdev); in __send_empty_flush()
1495 BUG_ON(bio_has_data(ci->bio)); in __send_empty_flush()
1496 while ((ti = dm_table_get_target(ci->map, target_nr++))) in __send_empty_flush()
1497 __send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL); in __send_empty_flush()
1499 bio_uninit(ci->bio); in __send_empty_flush()
1506 struct bio *bio = ci->bio; in __clone_and_map_data_bio()
1511 tio->len_ptr = len; in __clone_and_map_data_bio()
1534 return -EOPNOTSUPP; in __send_changing_extent_only()
1536 len = min_t(sector_t, ci->sector_count, in __send_changing_extent_only()
1537 max_io_len_target_boundary(ti, dm_target_offset(ti, ci->sector))); in __send_changing_extent_only()
1541 ci->sector += len; in __send_changing_extent_only()
1542 ci->sector_count -= len; in __send_changing_extent_only()
1566 struct bio *bio = ci->bio; in __process_abnormal_io()
1571 num_bios = ti->num_discard_bios; in __process_abnormal_io()
1574 num_bios = ti->num_secure_erase_bios; in __process_abnormal_io()
1577 num_bios = ti->num_write_same_bios; in __process_abnormal_io()
1580 num_bios = ti->num_write_zeroes_bios; in __process_abnormal_io()
1591 * Select the correct strategy for processing a non-flush bio.
1599 ti = dm_table_find_target(ci->map, ci->sector); in __split_and_process_non_flush()
1601 return -EIO; in __split_and_process_non_flush()
1606 len = min_t(sector_t, max_io_len(ti, ci->sector), ci->sector_count); in __split_and_process_non_flush()
1608 r = __clone_and_map_data_bio(ci, ti, ci->sector, &len); in __split_and_process_non_flush()
1612 ci->sector += len; in __split_and_process_non_flush()
1613 ci->sector_count -= len; in __split_and_process_non_flush()
1621 ci->map = map; in init_clone_info()
1622 ci->io = alloc_io(md, bio); in init_clone_info()
1623 ci->sector = bio->bi_iter.bi_sector; in init_clone_info()
1627 (part_stat_get(part, field) -= (subnd))
1630 * Entry point to split a bio into clones and submit them to the targets.
1641 if (bio->bi_opf & REQ_PREFLUSH) { in __split_and_process_bio()
1653 if (current->bio_list && ci.sector_count && !error) { in __split_and_process_bio()
1655 * Remainder must be passed to submit_bio_noacct() in __split_and_process_bio()
1658 * We take a clone of the original to store in in __split_and_process_bio()
1659 * ci.io->orig_bio to be used by end_io_acct() and in __split_and_process_bio()
1660 * for dec_pending to use for completion handling. in __split_and_process_bio()
1662 struct bio *b = bio_split(bio, bio_sectors(bio) - ci.sector_count, in __split_and_process_bio()
1663 GFP_NOIO, &md->queue->bio_split); in __split_and_process_bio()
1664 ci.io->orig_bio = b; in __split_and_process_bio()
1669 * NOTE: this is a stop-gap fix, a proper fix involves in __split_and_process_bio()
1674 __dm_part_stat_sub(&dm_disk(md)->part0, in __split_and_process_bio()
1679 trace_block_split(md->queue, b, bio->bi_iter.bi_sector); in __split_and_process_bio()
1693 struct mapped_device *md = bio->bi_disk->private_data; in dm_submit_bio()
1701 if (unlikely(test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags)) || in dm_submit_bio()
1703 if (bio->bi_opf & REQ_NOWAIT) in dm_submit_bio()
1705 else if (bio->bi_opf & REQ_RAHEAD) in dm_submit_bio()
1725 /*-----------------------------------------------------------------
1726 * An IDR is used to keep track of allocated minor numbers.
1727 *---------------------------------------------------------------*/
1743 return -EINVAL; in specific_minor()
1753 return r == -ENOSPC ? -EBUSY : r; in specific_minor()
1782 if (md->wq) in cleanup_mapped_device()
1783 destroy_workqueue(md->wq); in cleanup_mapped_device()
1784 bioset_exit(&md->bs); in cleanup_mapped_device()
1785 bioset_exit(&md->io_bs); in cleanup_mapped_device()
1787 if (md->dax_dev) { in cleanup_mapped_device()
1788 kill_dax(md->dax_dev); in cleanup_mapped_device()
1789 put_dax(md->dax_dev); in cleanup_mapped_device()
1790 md->dax_dev = NULL; in cleanup_mapped_device()
1793 if (md->disk) { in cleanup_mapped_device()
1795 md->disk->private_data = NULL; in cleanup_mapped_device()
1797 del_gendisk(md->disk); in cleanup_mapped_device()
1798 put_disk(md->disk); in cleanup_mapped_device()
1801 if (md->queue) in cleanup_mapped_device()
1802 blk_cleanup_queue(md->queue); in cleanup_mapped_device()
1804 cleanup_srcu_struct(&md->io_barrier); in cleanup_mapped_device()
1806 if (md->bdev) { in cleanup_mapped_device()
1807 bdput(md->bdev); in cleanup_mapped_device()
1808 md->bdev = NULL; in cleanup_mapped_device()
1811 mutex_destroy(&md->suspend_lock); in cleanup_mapped_device()
1812 mutex_destroy(&md->type_lock); in cleanup_mapped_device()
1813 mutex_destroy(&md->table_devices_lock); in cleanup_mapped_device()
1814 mutex_destroy(&md->swap_bios_lock); in cleanup_mapped_device()
1830 DMWARN("unable to allocate device, out of memory."); in alloc_dev()
1845 r = init_srcu_struct(&md->io_barrier); in alloc_dev()
1849 md->numa_node_id = numa_node_id; in alloc_dev()
1850 md->init_tio_pdu = false; in alloc_dev()
1851 md->type = DM_TYPE_NONE; in alloc_dev()
1852 mutex_init(&md->suspend_lock); in alloc_dev()
1853 mutex_init(&md->type_lock); in alloc_dev()
1854 mutex_init(&md->table_devices_lock); in alloc_dev()
1855 spin_lock_init(&md->deferred_lock); in alloc_dev()
1856 atomic_set(&md->holders, 1); in alloc_dev()
1857 atomic_set(&md->open_count, 0); in alloc_dev()
1858 atomic_set(&md->event_nr, 0); in alloc_dev()
1859 atomic_set(&md->uevent_seq, 0); in alloc_dev()
1860 INIT_LIST_HEAD(&md->uevent_list); in alloc_dev()
1861 INIT_LIST_HEAD(&md->table_devices); in alloc_dev()
1862 spin_lock_init(&md->uevent_lock); in alloc_dev()
1865 * default to bio-based until DM table is loaded and md->type in alloc_dev()
1866 * established. If request-based table is loaded: blk-mq will in alloc_dev()
1869 md->queue = blk_alloc_queue(numa_node_id); in alloc_dev()
1870 if (!md->queue) in alloc_dev()
1873 md->disk = alloc_disk_node(1, md->numa_node_id); in alloc_dev()
1874 if (!md->disk) in alloc_dev()
1877 init_waitqueue_head(&md->wait); in alloc_dev()
1878 INIT_WORK(&md->work, dm_wq_work); in alloc_dev()
1879 init_waitqueue_head(&md->eventq); in alloc_dev()
1880 init_completion(&md->kobj_holder.completion); in alloc_dev()
1882 md->swap_bios = get_swap_bios(); in alloc_dev()
1883 sema_init(&md->swap_bios_semaphore, md->swap_bios); in alloc_dev()
1884 mutex_init(&md->swap_bios_lock); in alloc_dev()
1886 md->disk->major = _major; in alloc_dev()
1887 md->disk->first_minor = minor; in alloc_dev()
1888 md->disk->fops = &dm_blk_dops; in alloc_dev()
1889 md->disk->queue = md->queue; in alloc_dev()
1890 md->disk->private_data = md; in alloc_dev()
1891 sprintf(md->disk->disk_name, "dm-%d", minor); in alloc_dev()
1894 md->dax_dev = alloc_dax(md, md->disk->disk_name, in alloc_dev()
1896 if (IS_ERR(md->dax_dev)) { in alloc_dev()
1897 md->dax_dev = NULL; in alloc_dev()
1902 add_disk_no_queue_reg(md->disk); in alloc_dev()
1903 format_dev_t(md->name, MKDEV(_major, minor)); in alloc_dev()
1905 md->wq = alloc_workqueue("kdmflush", WQ_MEM_RECLAIM, 0); in alloc_dev()
1906 if (!md->wq) in alloc_dev()
1909 md->bdev = bdget_disk(md->disk, 0); in alloc_dev()
1910 if (!md->bdev) in alloc_dev()
1913 r = dm_stats_init(&md->stats); in alloc_dev()
1941 int minor = MINOR(disk_devt(md->disk)); in free_dev()
1947 free_table_devices(&md->table_devices); in free_dev()
1948 dm_stats_cleanup(&md->stats); in free_dev()
1966 bioset_exit(&md->bs); in __bind_mempools()
1967 bioset_exit(&md->io_bs); in __bind_mempools()
1969 } else if (bioset_initialized(&md->bs)) { in __bind_mempools()
1971 * There's no need to reload with request-based dm in __bind_mempools()
1973 * Note for future: If you are to reload bioset, in __bind_mempools()
1974 * prep-ed requests in the queue may refer in __bind_mempools()
1975 * to bio from the old bioset, so you must walk in __bind_mempools()
1976 * through the queue to unprep. in __bind_mempools()
1982 bioset_initialized(&md->bs) || in __bind_mempools()
1983 bioset_initialized(&md->io_bs)); in __bind_mempools()
1985 ret = bioset_init_from_src(&md->bs, &p->bs); in __bind_mempools()
1988 ret = bioset_init_from_src(&md->io_bs, &p->io_bs); in __bind_mempools()
1990 bioset_exit(&md->bs); in __bind_mempools()
1998 * Bind a table to the device.
2006 spin_lock_irqsave(&md->uevent_lock, flags); in event_callback()
2007 list_splice_init(&md->uevent_list, &uevents); in event_callback()
2008 spin_unlock_irqrestore(&md->uevent_lock, flags); in event_callback()
2010 dm_send_uevents(&uevents, &disk_to_dev(md->disk)->kobj); in event_callback()
2012 atomic_inc(&md->event_nr); in event_callback()
2013 wake_up(&md->eventq); in event_callback()
2024 struct request_queue *q = md->queue; in __bind()
2029 lockdep_assert_held(&md->suspend_lock); in __bind()
2037 memset(&md->geometry, 0, sizeof(md->geometry)); in __bind()
2039 set_capacity(md->disk, size); in __bind()
2040 bd_set_nr_sectors(md->bdev, size); in __bind()
2046 * Leverage the fact that request-based DM targets are in __bind()
2047 * immutable singletons - used to optimize dm_mq_queue_rq. in __bind()
2049 md->immutable_target = dm_table_get_immutable_target(t); in __bind()
2058 old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in __bind()
2059 rcu_assign_pointer(md->map, (void *)t); in __bind()
2060 md->immutable_target_type = dm_table_get_immutable_target_type(t); in __bind()
2071 * Returns unbound table for the caller to free.
2075 struct dm_table *map = rcu_dereference_protected(md->map, 1); in __unbind()
2081 RCU_INIT_POINTER(md->map, NULL); in __unbind()
2097 return -ENXIO; in dm_create()
2110 * Functions to manage md->type.
2111 * All are required to hold md->type_lock.
2115 mutex_lock(&md->type_lock); in dm_lock_md_type()
2120 mutex_unlock(&md->type_lock); in dm_unlock_md_type()
2125 BUG_ON(!mutex_is_locked(&md->type_lock)); in dm_set_md_type()
2126 md->type = type; in dm_set_md_type()
2131 return md->type; in dm_get_md_type()
2136 return md->immutable_target_type; in dm_get_immutable_target_type()
2145 BUG_ON(!atomic_read(&md->holders)); in dm_get_queue_limits()
2146 return &md->queue->limits; in dm_get_queue_limits()
2161 md->disk->fops = &dm_rq_blk_dops; in dm_setup_md_queue()
2164 DMERR("Cannot initialize queue for request-based dm mapped device"); in dm_setup_md_queue()
2181 dm_table_set_restrictions(t, md->queue, &limits); in dm_setup_md_queue()
2182 blk_register_queue(md->disk); in dm_setup_md_queue()
2199 test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) { in dm_get_md()
2213 return md->interface_ptr; in dm_get_mdptr()
2218 md->interface_ptr = ptr; in dm_set_mdptr()
2223 atomic_inc(&md->holders); in dm_get()
2224 BUG_ON(test_bit(DMF_FREEING, &md->flags)); in dm_get()
2230 if (test_bit(DMF_FREEING, &md->flags)) { in dm_hold()
2232 return -EBUSY; in dm_hold()
2242 return md->name; in dm_device_name()
2255 set_bit(DMF_FREEING, &md->flags); in __dm_destroy()
2258 blk_set_queue_dying(md->queue); in __dm_destroy()
2262 * do not race with internal suspend. in __dm_destroy()
2264 mutex_lock(&md->suspend_lock); in __dm_destroy()
2268 set_bit(DMF_SUSPENDED, &md->flags); in __dm_destroy()
2269 set_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_destroy()
2274 mutex_unlock(&md->suspend_lock); in __dm_destroy()
2277 * Rare, but there may be I/O requests still going to complete, in __dm_destroy()
2278 * for example. Wait for all references to disappear. in __dm_destroy()
2283 while (atomic_read(&md->holders)) in __dm_destroy()
2285 else if (atomic_read(&md->holders)) in __dm_destroy()
2287 dm_device_name(md), atomic_read(&md->holders)); in __dm_destroy()
2306 atomic_dec(&md->holders); in dm_put()
2313 struct hd_struct *part = &dm_disk(md)->part0; in md_in_flight_bios()
2330 prepare_to_wait(&md->wait, &wait, task_state); in dm_wait_for_bios_completion()
2336 r = -EINTR; in dm_wait_for_bios_completion()
2342 finish_wait(&md->wait, &wait); in dm_wait_for_bios_completion()
2353 if (!queue_is_mq(md->queue)) in dm_wait_for_completion()
2357 if (!blk_mq_queue_inflight(md->queue)) in dm_wait_for_completion()
2361 r = -EINTR; in dm_wait_for_completion()
2379 while (!test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags)) { in dm_wq_work()
2380 spin_lock_irq(&md->deferred_lock); in dm_wq_work()
2381 bio = bio_list_pop(&md->deferred); in dm_wq_work()
2382 spin_unlock_irq(&md->deferred_lock); in dm_wq_work()
2394 clear_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in dm_queue_flush()
2396 queue_work(md->wq, &md->work); in dm_queue_flush()
2400 * Swap in a new table, returning the old one for the caller to destroy.
2404 struct dm_table *live_map = NULL, *map = ERR_PTR(-EINVAL); in dm_swap_table()
2408 mutex_lock(&md->suspend_lock); in dm_swap_table()
2423 limits = md->queue->limits; in dm_swap_table()
2439 mutex_unlock(&md->suspend_lock); in dm_swap_table()
2444 * Functions to lock and unlock any filesystem running on the
2451 WARN_ON(md->frozen_sb); in lock_fs()
2453 md->frozen_sb = freeze_bdev(md->bdev); in lock_fs()
2454 if (IS_ERR(md->frozen_sb)) { in lock_fs()
2455 r = PTR_ERR(md->frozen_sb); in lock_fs()
2456 md->frozen_sb = NULL; in lock_fs()
2460 set_bit(DMF_FROZEN, &md->flags); in lock_fs()
2467 if (!test_bit(DMF_FROZEN, &md->flags)) in unlock_fs()
2470 thaw_bdev(md->bdev, md->frozen_sb); in unlock_fs()
2471 md->frozen_sb = NULL; in unlock_fs()
2472 clear_bit(DMF_FROZEN, &md->flags); in unlock_fs()
2481 * now. There is no request-processing activity. All new requests
2482 * are being added to md->deferred list.
2492 lockdep_assert_held(&md->suspend_lock); in __dm_suspend()
2499 set_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __dm_suspend()
2510 * Flush I/O to the device. in __dm_suspend()
2513 * (lock_fs() flushes I/Os and waits for them to complete.) in __dm_suspend()
2525 * to target drivers i.e. no one may be executing in __dm_suspend()
2528 * To get all processes out of __split_and_process_bio in dm_submit_bio, in __dm_suspend()
2529 * we take the write lock. To prevent any process from reentering in __dm_suspend()
2532 * flush_workqueue(md->wq). in __dm_suspend()
2534 set_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in __dm_suspend()
2536 synchronize_srcu(&md->io_barrier); in __dm_suspend()
2539 * Stop md->queue before flushing md->wq in case request-based in __dm_suspend()
2540 * dm defers requests to md->wq from md->queue. in __dm_suspend()
2543 dm_stop_queue(md->queue); in __dm_suspend()
2545 flush_workqueue(md->wq); in __dm_suspend()
2549 * We call dm_wait_for_completion to wait for all existing requests in __dm_suspend()
2550 * to finish. in __dm_suspend()
2554 set_bit(dmf_suspended_flag, &md->flags); in __dm_suspend()
2557 clear_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __dm_suspend()
2559 synchronize_srcu(&md->io_barrier); in __dm_suspend()
2566 dm_start_queue(md->queue); in __dm_suspend()
2577 * We need to be able to change a mapping table under a mounted
2578 * filesystem. For example we might want to move some data in
2580 * dm_bind_table, dm_suspend must be called to flush any in
2584 * Suspend mechanism in request-based dm.
2588 * 3. Wait for all in-flight I/Os to be completed or requeued.
2590 * To abort suspend, start the request_queue.
2598 mutex_lock_nested(&md->suspend_lock, SINGLE_DEPTH_NESTING); in dm_suspend()
2601 r = -EINVAL; in dm_suspend()
2607 mutex_unlock(&md->suspend_lock); in dm_suspend()
2608 r = wait_on_bit(&md->flags, DMF_SUSPENDED_INTERNALLY, TASK_INTERRUPTIBLE); in dm_suspend()
2614 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in dm_suspend()
2620 set_bit(DMF_POST_SUSPENDING, &md->flags); in dm_suspend()
2622 clear_bit(DMF_POST_SUSPENDING, &md->flags); in dm_suspend()
2625 mutex_unlock(&md->suspend_lock); in dm_suspend()
2642 * Request-based dm is queueing the deferred I/Os in its request_queue. in __dm_resume()
2645 dm_start_queue(md->queue); in __dm_resume()
2658 r = -EINVAL; in dm_resume()
2659 mutex_lock_nested(&md->suspend_lock, SINGLE_DEPTH_NESTING); in dm_resume()
2666 mutex_unlock(&md->suspend_lock); in dm_resume()
2667 r = wait_on_bit(&md->flags, DMF_SUSPENDED_INTERNALLY, TASK_INTERRUPTIBLE); in dm_resume()
2673 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in dm_resume()
2681 clear_bit(DMF_SUSPENDED, &md->flags); in dm_resume()
2683 mutex_unlock(&md->suspend_lock); in dm_resume()
2689 * Internal suspend/resume works like userspace-driven suspend. It waits
2690 * until all bios finish and prevents issuing new bios to the target drivers.
2698 lockdep_assert_held(&md->suspend_lock); in __dm_internal_suspend()
2700 if (md->internal_suspend_count++) in __dm_internal_suspend()
2701 return; /* nested internal suspend */ in __dm_internal_suspend()
2704 set_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in __dm_internal_suspend()
2705 return; /* nest suspend */ in __dm_internal_suspend()
2708 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in __dm_internal_suspend()
2711 * Using TASK_UNINTERRUPTIBLE because only NOFLUSH internal suspend is in __dm_internal_suspend()
2712 * supported. Properly supporting a TASK_INTERRUPTIBLE internal suspend in __dm_internal_suspend()
2713 * would require changing .presuspend to return an error -- avoid this in __dm_internal_suspend()
2714 * until there is a need for more elaborate variants of internal suspend. in __dm_internal_suspend()
2719 set_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_internal_suspend()
2721 clear_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_internal_suspend()
2726 BUG_ON(!md->internal_suspend_count); in __dm_internal_resume()
2728 if (--md->internal_suspend_count) in __dm_internal_resume()
2729 return; /* resume from nested internal suspend */ in __dm_internal_resume()
2732 goto done; /* resume from nested suspend */ in __dm_internal_resume()
2735 * NOTE: existing callers don't need to call dm_table_resume_targets in __dm_internal_resume()
2736 * (which may fail -- so best to avoid it for now by passing NULL map) in __dm_internal_resume()
2741 clear_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in __dm_internal_resume()
2743 wake_up_bit(&md->flags, DMF_SUSPENDED_INTERNALLY); in __dm_internal_resume()
2748 mutex_lock(&md->suspend_lock); in dm_internal_suspend_noflush()
2750 mutex_unlock(&md->suspend_lock); in dm_internal_suspend_noflush()
2756 mutex_lock(&md->suspend_lock); in dm_internal_resume()
2758 mutex_unlock(&md->suspend_lock); in dm_internal_resume()
2763 * Fast variants of internal suspend/resume hold md->suspend_lock,
2764 * which prevents interaction with userspace-driven suspend.
2769 mutex_lock(&md->suspend_lock); in dm_internal_suspend_fast()
2773 set_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in dm_internal_suspend_fast()
2774 synchronize_srcu(&md->io_barrier); in dm_internal_suspend_fast()
2775 flush_workqueue(md->wq); in dm_internal_suspend_fast()
2788 mutex_unlock(&md->suspend_lock); in dm_internal_resume_fast()
2792 /*-----------------------------------------------------------------
2794 *---------------------------------------------------------------*/
2806 r = kobject_uevent(&disk_to_dev(md->disk)->kobj, action); in dm_kobject_uevent()
2810 r = kobject_uevent_env(&disk_to_dev(md->disk)->kobj, in dm_kobject_uevent()
2821 return atomic_add_return(1, &md->uevent_seq); in dm_next_uevent_seq()
2826 return atomic_read(&md->event_nr); in dm_get_event_nr()
2831 return wait_event_interruptible(md->eventq, in dm_wait_event()
2832 (event_nr != atomic_read(&md->event_nr))); in dm_wait_event()
2839 spin_lock_irqsave(&md->uevent_lock, flags); in dm_uevent_add()
2840 list_add(elist, &md->uevent_list); in dm_uevent_add()
2841 spin_unlock_irqrestore(&md->uevent_lock, flags); in dm_uevent_add()
2850 return md->disk; in dm_disk()
2856 return &md->kobj_holder.kobj; in dm_kobject()
2866 if (test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) { in dm_get_from_kobject()
2879 return test_bit(DMF_SUSPENDED, &md->flags); in dm_suspended_md()
2884 return test_bit(DMF_POST_SUSPENDING, &md->flags); in dm_post_suspending_md()
2889 return test_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in dm_suspended_internally_md()
2894 return test_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_test_deferred_remove_flag()
2899 return dm_suspended_md(ti->table->md); in dm_suspended()
2905 return dm_post_suspending_md(ti->table->md); in dm_post_suspending()
2911 return __noflush_suspending(ti->table->md); in dm_noflush_suspending()
2919 struct dm_md_mempools *pools = kzalloc_node(sizeof(*pools), GFP_KERNEL, md->numa_node_id); in dm_alloc_md_mempools()
2933 ret = bioset_init(&pools->io_bs, pool_size, io_front_pad, 0); in dm_alloc_md_mempools()
2936 if (integrity && bioset_integrity_create(&pools->io_bs, pool_size)) in dm_alloc_md_mempools()
2942 /* per_io_data_size is used for blk-mq pdu at queue allocation */ in dm_alloc_md_mempools()
2948 ret = bioset_init(&pools->bs, pool_size, front_pad, 0); in dm_alloc_md_mempools()
2952 if (integrity && bioset_integrity_create(&pools->bs, pool_size)) in dm_alloc_md_mempools()
2968 bioset_exit(&pools->bs); in dm_free_md_mempools()
2969 bioset_exit(&pools->io_bs); in dm_free_md_mempools()
2984 struct mapped_device *md = bdev->bd_disk->private_data; in dm_call_pr()
2987 int ret = -ENOTTY, srcu_idx; in dm_call_pr()
2999 ret = -EAGAIN; in dm_call_pr()
3003 ret = -EINVAL; in dm_call_pr()
3004 if (!ti->type->iterate_devices) in dm_call_pr()
3007 ret = ti->type->iterate_devices(ti, fn, data); in dm_call_pr()
3014 * For register / unregister we need to manually call out to every path.
3020 const struct pr_ops *ops = dev->bdev->bd_disk->fops->pr_ops; in __dm_pr_register()
3022 if (!ops || !ops->pr_register) in __dm_pr_register()
3023 return -EOPNOTSUPP; in __dm_pr_register()
3024 return ops->pr_register(dev->bdev, pr->old_key, pr->new_key, pr->flags); in __dm_pr_register()
3040 /* unregister all paths if we failed to register any path */ in dm_pr_register()
3054 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_reserve()
3062 ops = bdev->bd_disk->fops->pr_ops; in dm_pr_reserve()
3063 if (ops && ops->pr_reserve) in dm_pr_reserve()
3064 r = ops->pr_reserve(bdev, key, type, flags); in dm_pr_reserve()
3066 r = -EOPNOTSUPP; in dm_pr_reserve()
3074 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_release()
3082 ops = bdev->bd_disk->fops->pr_ops; in dm_pr_release()
3083 if (ops && ops->pr_release) in dm_pr_release()
3084 r = ops->pr_release(bdev, key, type); in dm_pr_release()
3086 r = -EOPNOTSUPP; in dm_pr_release()
3095 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_preempt()
3103 ops = bdev->bd_disk->fops->pr_ops; in dm_pr_preempt()
3104 if (ops && ops->pr_preempt) in dm_pr_preempt()
3105 r = ops->pr_preempt(bdev, old_key, new_key, type, abort); in dm_pr_preempt()
3107 r = -EOPNOTSUPP; in dm_pr_preempt()
3115 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_clear()
3123 ops = bdev->bd_disk->fops->pr_ops; in dm_pr_clear()
3124 if (ops && ops->pr_clear) in dm_pr_clear()
3125 r = ops->pr_clear(bdev, key); in dm_pr_clear()
3127 r = -EOPNOTSUPP; in dm_pr_clear()
3179 MODULE_PARM_DESC(reserved_bio_based_ios, "Reserved IOs in bio-based mempools");
3188 MODULE_AUTHOR("Joe Thornber <dm-devel@redhat.com>");