Lines Matching refs:md
97 struct mapped_device *md; member
338 int dm_deleting_md(struct mapped_device *md) in dm_deleting_md() argument
340 return test_bit(DMF_DELETING, &md->flags); in dm_deleting_md()
345 struct mapped_device *md; in dm_blk_open() local
349 md = bdev->bd_disk->private_data; in dm_blk_open()
350 if (!md) in dm_blk_open()
353 if (test_bit(DMF_FREEING, &md->flags) || in dm_blk_open()
354 dm_deleting_md(md)) { in dm_blk_open()
355 md = NULL; in dm_blk_open()
359 dm_get(md); in dm_blk_open()
360 atomic_inc(&md->open_count); in dm_blk_open()
364 return md ? 0 : -ENXIO; in dm_blk_open()
369 struct mapped_device *md; in dm_blk_close() local
373 md = disk->private_data; in dm_blk_close()
374 if (WARN_ON(!md)) in dm_blk_close()
377 if (atomic_dec_and_test(&md->open_count) && in dm_blk_close()
378 (test_bit(DMF_DEFERRED_REMOVE, &md->flags))) in dm_blk_close()
381 dm_put(md); in dm_blk_close()
386 int dm_open_count(struct mapped_device *md) in dm_open_count() argument
388 return atomic_read(&md->open_count); in dm_open_count()
394 int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred) in dm_lock_for_deletion() argument
400 if (dm_open_count(md)) { in dm_lock_for_deletion()
403 set_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_lock_for_deletion()
404 } else if (only_deferred && !test_bit(DMF_DEFERRED_REMOVE, &md->flags)) in dm_lock_for_deletion()
407 set_bit(DMF_DELETING, &md->flags); in dm_lock_for_deletion()
414 int dm_cancel_deferred_remove(struct mapped_device *md) in dm_cancel_deferred_remove() argument
420 if (test_bit(DMF_DELETING, &md->flags)) in dm_cancel_deferred_remove()
423 clear_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_cancel_deferred_remove()
437 struct mapped_device *md = bdev->bd_disk->private_data; in dm_blk_getgeo() local
439 return dm_get_geometry(md, geo); in dm_blk_getgeo()
476 struct mapped_device *md = disk->private_data; in dm_blk_report_zones() local
485 if (dm_suspended_md(md)) in dm_blk_report_zones()
488 map = dm_get_live_table(md, &srcu_idx); in dm_blk_report_zones()
513 dm_put_live_table(md, srcu_idx); in dm_blk_report_zones()
520 static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx, in dm_prepare_ioctl() argument
529 map = dm_get_live_table(md, srcu_idx); in dm_prepare_ioctl()
541 if (dm_suspended_md(md)) in dm_prepare_ioctl()
546 dm_put_live_table(md, *srcu_idx); in dm_prepare_ioctl()
554 static void dm_unprepare_ioctl(struct mapped_device *md, int srcu_idx) in dm_unprepare_ioctl() argument
556 dm_put_live_table(md, srcu_idx); in dm_unprepare_ioctl()
562 struct mapped_device *md = bdev->bd_disk->private_data; in dm_blk_ioctl() local
565 r = dm_prepare_ioctl(md, &srcu_idx, &bdev); in dm_blk_ioctl()
585 dm_unprepare_ioctl(md, srcu_idx); in dm_blk_ioctl()
600 struct mapped_device *md = io->md; in start_io_acct() local
604 if (unlikely(dm_stats_used(&md->stats))) in start_io_acct()
605 dm_stats_account_io(&md->stats, bio_data_dir(bio), in start_io_acct()
612 struct mapped_device *md = io->md; in end_io_acct() local
618 if (unlikely(dm_stats_used(&md->stats))) in end_io_acct()
619 dm_stats_account_io(&md->stats, bio_data_dir(bio), 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()
628 static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio) in alloc_io() argument
634 clone = bio_alloc_bioset(GFP_NOIO, 0, &md->io_bs); in alloc_io()
647 io->md = md; in alloc_io()
655 static void free_io(struct mapped_device *md, struct dm_io *io) in free_io() argument
669 struct bio *clone = bio_alloc_bioset(gfp_mask, 0, &ci->io->md->bs); in alloc_tio()
695 static void queue_io(struct mapped_device *md, struct bio *bio) in queue_io() argument
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()
710 struct dm_table *dm_get_live_table(struct mapped_device *md, int *srcu_idx) __acquires(md->io_barri… in dm_get_live_table() argument
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() argument
719 srcu_read_unlock(&md->io_barrier, srcu_idx); in dm_put_live_table()
722 void dm_sync_table(struct mapped_device *md) in dm_sync_table() argument
724 synchronize_srcu(&md->io_barrier); in dm_sync_table()
732 static struct dm_table *dm_get_live_table_fast(struct mapped_device *md) __acquires(RCU) in dm_get_live_table_fast() argument
735 return rcu_dereference(md->map); in dm_get_live_table_fast()
738 static void dm_put_live_table_fast(struct mapped_device *md) __releases(RCU) in dm_put_live_table_fast() argument
749 struct mapped_device *md) in open_table_device() argument
761 r = bd_link_disk_holder(bdev, dm_disk(md)); in open_table_device()
775 static void close_table_device(struct table_device *td, struct mapped_device *md) in close_table_device() argument
780 bd_unlink_disk_holder(td->dm_dev.bdev, dm_disk(md)); in close_table_device()
799 int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode, in dm_get_table_device() argument
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()
817 if ((r = open_table_device(td, dev, md))) { in dm_get_table_device()
818 mutex_unlock(&md->table_devices_lock); in dm_get_table_device()
826 list_add(&td->list, &md->table_devices); in dm_get_table_device()
830 mutex_unlock(&md->table_devices_lock); in dm_get_table_device()
837 void dm_put_table_device(struct mapped_device *md, struct dm_dev *d) in dm_put_table_device() argument
841 mutex_lock(&md->table_devices_lock); in dm_put_table_device()
843 close_table_device(td, md); in dm_put_table_device()
847 mutex_unlock(&md->table_devices_lock); in dm_put_table_device()
867 int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo) in dm_get_geometry() argument
869 *geo = md->geometry; in dm_get_geometry()
877 int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo) in dm_set_geometry() argument
886 md->geometry = *geo; in dm_set_geometry()
891 static int __noflush_suspending(struct mapped_device *md) in __noflush_suspending() argument
893 return test_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __noflush_suspending()
905 struct mapped_device *md = io->md; in dec_pending() local
910 if (!(io->status == BLK_STS_DM_REQUEUE && __noflush_suspending(md))) in dec_pending()
920 spin_lock_irqsave(&md->deferred_lock, flags); in dec_pending()
921 if (__noflush_suspending(md)) in dec_pending()
923 bio_list_add_head(&md->deferred, io->orig_bio); in dec_pending()
927 spin_unlock_irqrestore(&md->deferred_lock, flags); in dec_pending()
933 free_io(md, io); in dec_pending()
944 queue_io(md, bio); in dec_pending()
954 void disable_discard(struct mapped_device *md) in disable_discard() argument
956 struct queue_limits *limits = dm_get_queue_limits(md); in disable_discard()
960 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, md->queue); in disable_discard()
963 void disable_write_same(struct mapped_device *md) in disable_write_same() argument
965 struct queue_limits *limits = dm_get_queue_limits(md); in disable_write_same()
971 void disable_write_zeroes(struct mapped_device *md) in disable_write_zeroes() argument
973 struct queue_limits *limits = dm_get_queue_limits(md); in disable_write_zeroes()
989 struct mapped_device *md = tio->io->md; in clone_endio() local
996 disable_discard(md); in clone_endio()
999 disable_write_same(md); in clone_endio()
1002 disable_write_zeroes(md); in clone_endio()
1035 struct mapped_device *md = io->md; in clone_endio() local
1036 up(&md->swap_bios_semaphore); in clone_endio()
1067 max_len = blk_max_size_offset(ti->table->md->queue, in max_io_len()
1091 static struct dm_target *dm_dax_get_live_target(struct mapped_device *md, in dm_dax_get_live_target() argument
1093 __acquires(md->io_barrier) in dm_dax_get_live_target()
1098 map = dm_get_live_table(md, srcu_idx); in dm_dax_get_live_target()
1112 struct mapped_device *md = dax_get_private(dax_dev); in dm_dax_direct_access() local
1118 ti = dm_dax_get_live_target(md, sector, &srcu_idx); in dm_dax_direct_access()
1131 dm_put_live_table(md, srcu_idx); in dm_dax_direct_access()
1139 struct mapped_device *md = dax_get_private(dax_dev); in dm_dax_supported() local
1144 map = dm_get_live_table(md, &srcu_idx); in dm_dax_supported()
1151 dm_put_live_table(md, srcu_idx); in dm_dax_supported()
1159 struct mapped_device *md = dax_get_private(dax_dev); in dm_dax_copy_from_iter() local
1165 ti = dm_dax_get_live_target(md, sector, &srcu_idx); in dm_dax_copy_from_iter()
1175 dm_put_live_table(md, srcu_idx); in dm_dax_copy_from_iter()
1183 struct mapped_device *md = dax_get_private(dax_dev); in dm_dax_copy_to_iter() local
1189 ti = dm_dax_get_live_target(md, sector, &srcu_idx); in dm_dax_copy_to_iter()
1199 dm_put_live_table(md, srcu_idx); in dm_dax_copy_to_iter()
1207 struct mapped_device *md = dax_get_private(dax_dev); in dm_dax_zero_page_range() local
1213 ti = dm_dax_get_live_target(md, sector, &srcu_idx); in dm_dax_zero_page_range()
1226 dm_put_live_table(md, srcu_idx); in dm_dax_zero_page_range()
1276 static noinline void __set_swap_bios_limit(struct mapped_device *md, int latch) in __set_swap_bios_limit() argument
1278 mutex_lock(&md->swap_bios_lock); in __set_swap_bios_limit()
1279 while (latch < md->swap_bios) { in __set_swap_bios_limit()
1281 down(&md->swap_bios_semaphore); in __set_swap_bios_limit()
1282 md->swap_bios--; in __set_swap_bios_limit()
1284 while (latch > md->swap_bios) { in __set_swap_bios_limit()
1286 up(&md->swap_bios_semaphore); in __set_swap_bios_limit()
1287 md->swap_bios++; in __set_swap_bios_limit()
1289 mutex_unlock(&md->swap_bios_lock); in __set_swap_bios_limit()
1312 struct mapped_device *md = io->md; in __map_bio() local
1314 if (unlikely(latch != md->swap_bios)) in __map_bio()
1315 __set_swap_bios_limit(md, latch); in __map_bio()
1316 down(&md->swap_bios_semaphore); in __map_bio()
1331 struct mapped_device *md = io->md; in __map_bio() local
1332 up(&md->swap_bios_semaphore); in __map_bio()
1339 struct mapped_device *md = io->md; in __map_bio() local
1340 up(&md->swap_bios_semaphore); in __map_bio()
1378 dm_device_name(tio->io->md), in clone_bio()
1417 mutex_lock(&ci->io->md->table_devices_lock); in alloc_multiple_bios()
1426 mutex_unlock(&ci->io->md->table_devices_lock); in alloc_multiple_bios()
1489 bio_set_dev(ci->bio, ci->io->md->bdev); in __send_empty_flush()
1614 static void init_clone_info(struct clone_info *ci, struct mapped_device *md, in init_clone_info() argument
1618 ci->io = alloc_io(md, bio); in init_clone_info()
1628 static blk_qc_t __split_and_process_bio(struct mapped_device *md, in __split_and_process_bio() argument
1635 init_clone_info(&ci, md, map, bio); in __split_and_process_bio()
1659 GFP_NOIO, &md->queue->bio_split); in __split_and_process_bio()
1670 __dm_part_stat_sub(&dm_disk(md)->part0, in __split_and_process_bio()
1675 trace_block_split(md->queue, b, bio->bi_iter.bi_sector); in __split_and_process_bio()
1689 struct mapped_device *md = bio->bi_disk->private_data; in dm_submit_bio() local
1694 map = dm_get_live_table(md, &srcu_idx); in dm_submit_bio()
1697 dm_device_name(md)); in dm_submit_bio()
1703 if (unlikely(test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags))) { in dm_submit_bio()
1709 queue_io(md, bio); in dm_submit_bio()
1720 ret = __split_and_process_bio(md, map, bio); in dm_submit_bio()
1722 dm_put_live_table(md, srcu_idx); in dm_submit_bio()
1781 static void cleanup_mapped_device(struct mapped_device *md) in cleanup_mapped_device() argument
1783 if (md->wq) in cleanup_mapped_device()
1784 destroy_workqueue(md->wq); in cleanup_mapped_device()
1785 bioset_exit(&md->bs); in cleanup_mapped_device()
1786 bioset_exit(&md->io_bs); in cleanup_mapped_device()
1788 if (md->dax_dev) { in cleanup_mapped_device()
1789 kill_dax(md->dax_dev); in cleanup_mapped_device()
1790 put_dax(md->dax_dev); in cleanup_mapped_device()
1791 md->dax_dev = NULL; in cleanup_mapped_device()
1794 if (md->disk) { in cleanup_mapped_device()
1796 md->disk->private_data = NULL; in cleanup_mapped_device()
1798 del_gendisk(md->disk); in cleanup_mapped_device()
1799 put_disk(md->disk); in cleanup_mapped_device()
1802 if (md->queue) in cleanup_mapped_device()
1803 blk_cleanup_queue(md->queue); in cleanup_mapped_device()
1805 cleanup_srcu_struct(&md->io_barrier); in cleanup_mapped_device()
1807 if (md->bdev) { in cleanup_mapped_device()
1808 bdput(md->bdev); in cleanup_mapped_device()
1809 md->bdev = NULL; in cleanup_mapped_device()
1812 mutex_destroy(&md->suspend_lock); in cleanup_mapped_device()
1813 mutex_destroy(&md->type_lock); in cleanup_mapped_device()
1814 mutex_destroy(&md->table_devices_lock); in cleanup_mapped_device()
1815 mutex_destroy(&md->swap_bios_lock); in cleanup_mapped_device()
1817 dm_mq_cleanup_mapped_device(md); in cleanup_mapped_device()
1826 struct mapped_device *md; in alloc_dev() local
1829 md = kvzalloc_node(sizeof(*md), GFP_KERNEL, numa_node_id); in alloc_dev()
1830 if (!md) { in alloc_dev()
1846 r = init_srcu_struct(&md->io_barrier); in alloc_dev()
1850 md->numa_node_id = numa_node_id; in alloc_dev()
1851 md->init_tio_pdu = false; in alloc_dev()
1852 md->type = DM_TYPE_NONE; in alloc_dev()
1853 mutex_init(&md->suspend_lock); in alloc_dev()
1854 mutex_init(&md->type_lock); in alloc_dev()
1855 mutex_init(&md->table_devices_lock); in alloc_dev()
1856 spin_lock_init(&md->deferred_lock); in alloc_dev()
1857 atomic_set(&md->holders, 1); in alloc_dev()
1858 atomic_set(&md->open_count, 0); in alloc_dev()
1859 atomic_set(&md->event_nr, 0); in alloc_dev()
1860 atomic_set(&md->uevent_seq, 0); in alloc_dev()
1861 INIT_LIST_HEAD(&md->uevent_list); in alloc_dev()
1862 INIT_LIST_HEAD(&md->table_devices); in alloc_dev()
1863 spin_lock_init(&md->uevent_lock); in alloc_dev()
1870 md->queue = blk_alloc_queue(numa_node_id); in alloc_dev()
1871 if (!md->queue) in alloc_dev()
1874 md->disk = alloc_disk_node(1, md->numa_node_id); in alloc_dev()
1875 if (!md->disk) in alloc_dev()
1878 init_waitqueue_head(&md->wait); in alloc_dev()
1879 INIT_WORK(&md->work, dm_wq_work); in alloc_dev()
1880 init_waitqueue_head(&md->eventq); in alloc_dev()
1881 init_completion(&md->kobj_holder.completion); in alloc_dev()
1883 md->swap_bios = get_swap_bios(); in alloc_dev()
1884 sema_init(&md->swap_bios_semaphore, md->swap_bios); in alloc_dev()
1885 mutex_init(&md->swap_bios_lock); in alloc_dev()
1887 md->disk->major = _major; in alloc_dev()
1888 md->disk->first_minor = minor; in alloc_dev()
1889 md->disk->fops = &dm_blk_dops; in alloc_dev()
1890 md->disk->queue = md->queue; in alloc_dev()
1891 md->disk->private_data = md; in alloc_dev()
1892 sprintf(md->disk->disk_name, "dm-%d", minor); in alloc_dev()
1895 md->dax_dev = alloc_dax(md, md->disk->disk_name, in alloc_dev()
1897 if (IS_ERR(md->dax_dev)) { in alloc_dev()
1898 md->dax_dev = NULL; in alloc_dev()
1903 add_disk_no_queue_reg(md->disk); in alloc_dev()
1904 format_dev_t(md->name, MKDEV(_major, minor)); in alloc_dev()
1906 md->wq = alloc_workqueue("kdmflush", WQ_MEM_RECLAIM, 0); in alloc_dev()
1907 if (!md->wq) in alloc_dev()
1910 md->bdev = bdget_disk(md->disk, 0); in alloc_dev()
1911 if (!md->bdev) in alloc_dev()
1914 dm_stats_init(&md->stats); in alloc_dev()
1918 old_md = idr_replace(&_minor_idr, md, minor); in alloc_dev()
1923 return md; in alloc_dev()
1926 cleanup_mapped_device(md); in alloc_dev()
1932 kvfree(md); in alloc_dev()
1936 static void unlock_fs(struct mapped_device *md);
1938 static void free_dev(struct mapped_device *md) in free_dev() argument
1940 int minor = MINOR(disk_devt(md->disk)); in free_dev()
1942 unlock_fs(md); in free_dev()
1944 cleanup_mapped_device(md); in free_dev()
1946 free_table_devices(&md->table_devices); in free_dev()
1947 dm_stats_cleanup(&md->stats); in free_dev()
1951 kvfree(md); in free_dev()
1954 static int __bind_mempools(struct mapped_device *md, struct dm_table *t) in __bind_mempools() argument
1965 bioset_exit(&md->bs); in __bind_mempools()
1966 bioset_exit(&md->io_bs); in __bind_mempools()
1968 } else if (bioset_initialized(&md->bs)) { in __bind_mempools()
1981 bioset_initialized(&md->bs) || in __bind_mempools()
1982 bioset_initialized(&md->io_bs)); in __bind_mempools()
1984 ret = bioset_init_from_src(&md->bs, &p->bs); in __bind_mempools()
1987 ret = bioset_init_from_src(&md->io_bs, &p->io_bs); in __bind_mempools()
1989 bioset_exit(&md->bs); in __bind_mempools()
2003 struct mapped_device *md = (struct mapped_device *) context; in event_callback() local
2005 spin_lock_irqsave(&md->uevent_lock, flags); in event_callback()
2006 list_splice_init(&md->uevent_list, &uevents); in event_callback()
2007 spin_unlock_irqrestore(&md->uevent_lock, flags); in event_callback()
2009 dm_send_uevents(&uevents, &disk_to_dev(md->disk)->kobj); in event_callback()
2011 atomic_inc(&md->event_nr); in event_callback()
2012 wake_up(&md->eventq); in event_callback()
2019 static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t, in __bind() argument
2023 struct request_queue *q = md->queue; in __bind()
2028 lockdep_assert_held(&md->suspend_lock); in __bind()
2035 if (size != dm_get_size(md)) in __bind()
2036 memset(&md->geometry, 0, sizeof(md->geometry)); in __bind()
2038 set_capacity(md->disk, size); in __bind()
2039 bd_set_nr_sectors(md->bdev, size); in __bind()
2041 dm_table_event_callback(t, event_callback, md); in __bind()
2048 md->immutable_target = dm_table_get_immutable_target(t); in __bind()
2051 ret = __bind_mempools(md, t); in __bind()
2057 old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in __bind()
2058 rcu_assign_pointer(md->map, (void *)t); in __bind()
2059 md->immutable_target_type = dm_table_get_immutable_target_type(t); in __bind()
2063 dm_sync_table(md); in __bind()
2072 static struct dm_table *__unbind(struct mapped_device *md) in __unbind() argument
2074 struct dm_table *map = rcu_dereference_protected(md->map, 1); in __unbind()
2080 RCU_INIT_POINTER(md->map, NULL); in __unbind()
2081 dm_sync_table(md); in __unbind()
2092 struct mapped_device *md; in dm_create() local
2094 md = alloc_dev(minor); in dm_create()
2095 if (!md) in dm_create()
2098 r = dm_sysfs_init(md); in dm_create()
2100 free_dev(md); in dm_create()
2104 *result = md; in dm_create()
2112 void dm_lock_md_type(struct mapped_device *md) in dm_lock_md_type() argument
2114 mutex_lock(&md->type_lock); in dm_lock_md_type()
2117 void dm_unlock_md_type(struct mapped_device *md) in dm_unlock_md_type() argument
2119 mutex_unlock(&md->type_lock); in dm_unlock_md_type()
2122 void dm_set_md_type(struct mapped_device *md, enum dm_queue_mode type) in dm_set_md_type() argument
2124 BUG_ON(!mutex_is_locked(&md->type_lock)); in dm_set_md_type()
2125 md->type = type; in dm_set_md_type()
2128 enum dm_queue_mode dm_get_md_type(struct mapped_device *md) in dm_get_md_type() argument
2130 return md->type; in dm_get_md_type()
2133 struct target_type *dm_get_immutable_target_type(struct mapped_device *md) in dm_get_immutable_target_type() argument
2135 return md->immutable_target_type; in dm_get_immutable_target_type()
2142 struct queue_limits *dm_get_queue_limits(struct mapped_device *md) in dm_get_queue_limits() argument
2144 BUG_ON(!atomic_read(&md->holders)); in dm_get_queue_limits()
2145 return &md->queue->limits; in dm_get_queue_limits()
2152 int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t) in dm_setup_md_queue() argument
2156 enum dm_queue_mode type = dm_get_md_type(md); in dm_setup_md_queue()
2160 md->disk->fops = &dm_rq_blk_dops; in dm_setup_md_queue()
2161 r = dm_mq_init_request_queue(md, t); in dm_setup_md_queue()
2180 dm_table_set_restrictions(t, md->queue, &limits); in dm_setup_md_queue()
2181 blk_register_queue(md->disk); in dm_setup_md_queue()
2188 struct mapped_device *md; in dm_get_md() local
2196 md = idr_find(&_minor_idr, minor); in dm_get_md()
2197 if (!md || md == MINOR_ALLOCED || (MINOR(disk_devt(dm_disk(md))) != minor) || in dm_get_md()
2198 test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) { in dm_get_md()
2199 md = NULL; in dm_get_md()
2202 dm_get(md); in dm_get_md()
2206 return md; in dm_get_md()
2210 void *dm_get_mdptr(struct mapped_device *md) in dm_get_mdptr() argument
2212 return md->interface_ptr; in dm_get_mdptr()
2215 void dm_set_mdptr(struct mapped_device *md, void *ptr) in dm_set_mdptr() argument
2217 md->interface_ptr = ptr; in dm_set_mdptr()
2220 void dm_get(struct mapped_device *md) in dm_get() argument
2222 atomic_inc(&md->holders); in dm_get()
2223 BUG_ON(test_bit(DMF_FREEING, &md->flags)); in dm_get()
2226 int dm_hold(struct mapped_device *md) in dm_hold() argument
2229 if (test_bit(DMF_FREEING, &md->flags)) { in dm_hold()
2233 dm_get(md); in dm_hold()
2239 const char *dm_device_name(struct mapped_device *md) in dm_device_name() argument
2241 return md->name; in dm_device_name()
2245 static void __dm_destroy(struct mapped_device *md, bool wait) in __dm_destroy() argument
2253 idr_replace(&_minor_idr, MINOR_ALLOCED, MINOR(disk_devt(dm_disk(md)))); in __dm_destroy()
2254 set_bit(DMF_FREEING, &md->flags); in __dm_destroy()
2257 blk_set_queue_dying(md->queue); in __dm_destroy()
2263 mutex_lock(&md->suspend_lock); in __dm_destroy()
2264 map = dm_get_live_table(md, &srcu_idx); in __dm_destroy()
2265 if (!dm_suspended_md(md)) { in __dm_destroy()
2267 set_bit(DMF_SUSPENDED, &md->flags); in __dm_destroy()
2268 set_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_destroy()
2272 dm_put_live_table(md, srcu_idx); in __dm_destroy()
2273 mutex_unlock(&md->suspend_lock); in __dm_destroy()
2282 while (atomic_read(&md->holders)) in __dm_destroy()
2284 else if (atomic_read(&md->holders)) in __dm_destroy()
2286 dm_device_name(md), atomic_read(&md->holders)); in __dm_destroy()
2288 dm_sysfs_exit(md); in __dm_destroy()
2289 dm_table_destroy(__unbind(md)); in __dm_destroy()
2290 free_dev(md); in __dm_destroy()
2293 void dm_destroy(struct mapped_device *md) in dm_destroy() argument
2295 __dm_destroy(md, true); in dm_destroy()
2298 void dm_destroy_immediate(struct mapped_device *md) in dm_destroy_immediate() argument
2300 __dm_destroy(md, false); in dm_destroy_immediate()
2303 void dm_put(struct mapped_device *md) in dm_put() argument
2305 atomic_dec(&md->holders); in dm_put()
2309 static bool md_in_flight_bios(struct mapped_device *md) in md_in_flight_bios() argument
2312 struct hd_struct *part = &dm_disk(md)->part0; in md_in_flight_bios()
2323 static int dm_wait_for_bios_completion(struct mapped_device *md, long task_state) in dm_wait_for_bios_completion() argument
2329 prepare_to_wait(&md->wait, &wait, task_state); in dm_wait_for_bios_completion()
2331 if (!md_in_flight_bios(md)) in dm_wait_for_bios_completion()
2341 finish_wait(&md->wait, &wait); in dm_wait_for_bios_completion()
2346 static int dm_wait_for_completion(struct mapped_device *md, long task_state) in dm_wait_for_completion() argument
2350 if (!queue_is_mq(md->queue)) in dm_wait_for_completion()
2351 return dm_wait_for_bios_completion(md, task_state); in dm_wait_for_completion()
2354 if (!blk_mq_queue_inflight(md->queue)) in dm_wait_for_completion()
2373 struct mapped_device *md = container_of(work, struct mapped_device, work); in dm_wq_work() local
2376 while (!test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags)) { in dm_wq_work()
2377 spin_lock_irq(&md->deferred_lock); in dm_wq_work()
2378 bio = bio_list_pop(&md->deferred); in dm_wq_work()
2379 spin_unlock_irq(&md->deferred_lock); in dm_wq_work()
2388 static void dm_queue_flush(struct mapped_device *md) in dm_queue_flush() argument
2390 clear_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in dm_queue_flush()
2392 queue_work(md->wq, &md->work); in dm_queue_flush()
2398 struct dm_table *dm_swap_table(struct mapped_device *md, struct dm_table *table) in dm_swap_table() argument
2404 mutex_lock(&md->suspend_lock); in dm_swap_table()
2407 if (!dm_suspended_md(md)) in dm_swap_table()
2417 live_map = dm_get_live_table_fast(md); in dm_swap_table()
2419 limits = md->queue->limits; in dm_swap_table()
2420 dm_put_live_table_fast(md); in dm_swap_table()
2431 map = __bind(md, table, &limits); in dm_swap_table()
2435 mutex_unlock(&md->suspend_lock); in dm_swap_table()
2443 static int lock_fs(struct mapped_device *md) in lock_fs() argument
2447 WARN_ON(md->frozen_sb); in lock_fs()
2449 md->frozen_sb = freeze_bdev(md->bdev); in lock_fs()
2450 if (IS_ERR(md->frozen_sb)) { in lock_fs()
2451 r = PTR_ERR(md->frozen_sb); in lock_fs()
2452 md->frozen_sb = NULL; in lock_fs()
2456 set_bit(DMF_FROZEN, &md->flags); in lock_fs()
2461 static void unlock_fs(struct mapped_device *md) in unlock_fs() argument
2463 if (!test_bit(DMF_FROZEN, &md->flags)) in unlock_fs()
2466 thaw_bdev(md->bdev, md->frozen_sb); in unlock_fs()
2467 md->frozen_sb = NULL; in unlock_fs()
2468 clear_bit(DMF_FROZEN, &md->flags); in unlock_fs()
2480 static int __dm_suspend(struct mapped_device *md, struct dm_table *map, in __dm_suspend() argument
2488 lockdep_assert_held(&md->suspend_lock); in __dm_suspend()
2495 set_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __dm_suspend()
2497 DMDEBUG("%s: suspending with flush", dm_device_name(md)); in __dm_suspend()
2512 r = lock_fs(md); in __dm_suspend()
2530 set_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in __dm_suspend()
2532 synchronize_srcu(&md->io_barrier); in __dm_suspend()
2538 if (dm_request_based(md)) in __dm_suspend()
2539 dm_stop_queue(md->queue); in __dm_suspend()
2541 flush_workqueue(md->wq); in __dm_suspend()
2548 r = dm_wait_for_completion(md, task_state); in __dm_suspend()
2550 set_bit(dmf_suspended_flag, &md->flags); in __dm_suspend()
2553 clear_bit(DMF_NOFLUSH_SUSPENDING, &md->flags); in __dm_suspend()
2555 synchronize_srcu(&md->io_barrier); in __dm_suspend()
2559 dm_queue_flush(md); in __dm_suspend()
2561 if (dm_request_based(md)) in __dm_suspend()
2562 dm_start_queue(md->queue); in __dm_suspend()
2564 unlock_fs(md); in __dm_suspend()
2588 int dm_suspend(struct mapped_device *md, unsigned suspend_flags) in dm_suspend() argument
2594 mutex_lock_nested(&md->suspend_lock, SINGLE_DEPTH_NESTING); in dm_suspend()
2596 if (dm_suspended_md(md)) { in dm_suspend()
2601 if (dm_suspended_internally_md(md)) { in dm_suspend()
2603 mutex_unlock(&md->suspend_lock); in dm_suspend()
2604 r = wait_on_bit(&md->flags, DMF_SUSPENDED_INTERNALLY, TASK_INTERRUPTIBLE); in dm_suspend()
2610 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in dm_suspend()
2612 r = __dm_suspend(md, map, suspend_flags, TASK_INTERRUPTIBLE, DMF_SUSPENDED); in dm_suspend()
2616 set_bit(DMF_POST_SUSPENDING, &md->flags); in dm_suspend()
2618 clear_bit(DMF_POST_SUSPENDING, &md->flags); in dm_suspend()
2621 mutex_unlock(&md->suspend_lock); in dm_suspend()
2625 static int __dm_resume(struct mapped_device *md, struct dm_table *map) in __dm_resume() argument
2633 dm_queue_flush(md); in __dm_resume()
2640 if (dm_request_based(md)) in __dm_resume()
2641 dm_start_queue(md->queue); in __dm_resume()
2643 unlock_fs(md); in __dm_resume()
2648 int dm_resume(struct mapped_device *md) in dm_resume() argument
2655 mutex_lock_nested(&md->suspend_lock, SINGLE_DEPTH_NESTING); in dm_resume()
2657 if (!dm_suspended_md(md)) in dm_resume()
2660 if (dm_suspended_internally_md(md)) { in dm_resume()
2662 mutex_unlock(&md->suspend_lock); in dm_resume()
2663 r = wait_on_bit(&md->flags, DMF_SUSPENDED_INTERNALLY, TASK_INTERRUPTIBLE); in dm_resume()
2669 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in dm_resume()
2673 r = __dm_resume(md, map); in dm_resume()
2677 clear_bit(DMF_SUSPENDED, &md->flags); in dm_resume()
2679 mutex_unlock(&md->suspend_lock); in dm_resume()
2690 static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_flags) in __dm_internal_suspend() argument
2694 lockdep_assert_held(&md->suspend_lock); in __dm_internal_suspend()
2696 if (md->internal_suspend_count++) in __dm_internal_suspend()
2699 if (dm_suspended_md(md)) { in __dm_internal_suspend()
2700 set_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in __dm_internal_suspend()
2704 map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock)); in __dm_internal_suspend()
2712 (void) __dm_suspend(md, map, suspend_flags, TASK_UNINTERRUPTIBLE, in __dm_internal_suspend()
2715 set_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_internal_suspend()
2717 clear_bit(DMF_POST_SUSPENDING, &md->flags); in __dm_internal_suspend()
2720 static void __dm_internal_resume(struct mapped_device *md) in __dm_internal_resume() argument
2722 BUG_ON(!md->internal_suspend_count); in __dm_internal_resume()
2724 if (--md->internal_suspend_count) in __dm_internal_resume()
2727 if (dm_suspended_md(md)) in __dm_internal_resume()
2734 (void) __dm_resume(md, NULL); in __dm_internal_resume()
2737 clear_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in __dm_internal_resume()
2739 wake_up_bit(&md->flags, DMF_SUSPENDED_INTERNALLY); in __dm_internal_resume()
2742 void dm_internal_suspend_noflush(struct mapped_device *md) in dm_internal_suspend_noflush() argument
2744 mutex_lock(&md->suspend_lock); in dm_internal_suspend_noflush()
2745 __dm_internal_suspend(md, DM_SUSPEND_NOFLUSH_FLAG); in dm_internal_suspend_noflush()
2746 mutex_unlock(&md->suspend_lock); in dm_internal_suspend_noflush()
2750 void dm_internal_resume(struct mapped_device *md) in dm_internal_resume() argument
2752 mutex_lock(&md->suspend_lock); in dm_internal_resume()
2753 __dm_internal_resume(md); in dm_internal_resume()
2754 mutex_unlock(&md->suspend_lock); in dm_internal_resume()
2763 void dm_internal_suspend_fast(struct mapped_device *md) in dm_internal_suspend_fast() argument
2765 mutex_lock(&md->suspend_lock); in dm_internal_suspend_fast()
2766 if (dm_suspended_md(md) || dm_suspended_internally_md(md)) in dm_internal_suspend_fast()
2769 set_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags); in dm_internal_suspend_fast()
2770 synchronize_srcu(&md->io_barrier); in dm_internal_suspend_fast()
2771 flush_workqueue(md->wq); in dm_internal_suspend_fast()
2772 dm_wait_for_completion(md, TASK_UNINTERRUPTIBLE); in dm_internal_suspend_fast()
2776 void dm_internal_resume_fast(struct mapped_device *md) in dm_internal_resume_fast() argument
2778 if (dm_suspended_md(md) || dm_suspended_internally_md(md)) in dm_internal_resume_fast()
2781 dm_queue_flush(md); in dm_internal_resume_fast()
2784 mutex_unlock(&md->suspend_lock); in dm_internal_resume_fast()
2791 int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, in dm_kobject_uevent() argument
2802 r = kobject_uevent(&disk_to_dev(md->disk)->kobj, action); in dm_kobject_uevent()
2806 r = kobject_uevent_env(&disk_to_dev(md->disk)->kobj, in dm_kobject_uevent()
2815 uint32_t dm_next_uevent_seq(struct mapped_device *md) in dm_next_uevent_seq() argument
2817 return atomic_add_return(1, &md->uevent_seq); in dm_next_uevent_seq()
2820 uint32_t dm_get_event_nr(struct mapped_device *md) in dm_get_event_nr() argument
2822 return atomic_read(&md->event_nr); in dm_get_event_nr()
2825 int dm_wait_event(struct mapped_device *md, int event_nr) in dm_wait_event() argument
2827 return wait_event_interruptible(md->eventq, in dm_wait_event()
2828 (event_nr != atomic_read(&md->event_nr))); in dm_wait_event()
2831 void dm_uevent_add(struct mapped_device *md, struct list_head *elist) in dm_uevent_add() argument
2835 spin_lock_irqsave(&md->uevent_lock, flags); in dm_uevent_add()
2836 list_add(elist, &md->uevent_list); in dm_uevent_add()
2837 spin_unlock_irqrestore(&md->uevent_lock, flags); in dm_uevent_add()
2844 struct gendisk *dm_disk(struct mapped_device *md) in dm_disk() argument
2846 return md->disk; in dm_disk()
2850 struct kobject *dm_kobject(struct mapped_device *md) in dm_kobject() argument
2852 return &md->kobj_holder.kobj; in dm_kobject()
2857 struct mapped_device *md; in dm_get_from_kobject() local
2859 md = container_of(kobj, struct mapped_device, kobj_holder.kobj); in dm_get_from_kobject()
2862 if (test_bit(DMF_FREEING, &md->flags) || dm_deleting_md(md)) { in dm_get_from_kobject()
2863 md = NULL; in dm_get_from_kobject()
2866 dm_get(md); in dm_get_from_kobject()
2870 return md; in dm_get_from_kobject()
2873 int dm_suspended_md(struct mapped_device *md) in dm_suspended_md() argument
2875 return test_bit(DMF_SUSPENDED, &md->flags); in dm_suspended_md()
2878 static int dm_post_suspending_md(struct mapped_device *md) in dm_post_suspending_md() argument
2880 return test_bit(DMF_POST_SUSPENDING, &md->flags); in dm_post_suspending_md()
2883 int dm_suspended_internally_md(struct mapped_device *md) in dm_suspended_internally_md() argument
2885 return test_bit(DMF_SUSPENDED_INTERNALLY, &md->flags); in dm_suspended_internally_md()
2888 int dm_test_deferred_remove_flag(struct mapped_device *md) in dm_test_deferred_remove_flag() argument
2890 return test_bit(DMF_DEFERRED_REMOVE, &md->flags); in dm_test_deferred_remove_flag()
2895 return dm_suspended_md(ti->table->md); in dm_suspended()
2901 return dm_post_suspending_md(ti->table->md); in dm_post_suspending()
2907 return __noflush_suspending(ti->table->md); in dm_noflush_suspending()
2911 struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, enum dm_queue_mode type, in dm_alloc_md_mempools() argument
2915 struct dm_md_mempools *pools = kzalloc_node(sizeof(*pools), GFP_KERNEL, md->numa_node_id); in dm_alloc_md_mempools()
2980 struct mapped_device *md = bdev->bd_disk->private_data; in dm_call_pr() local
2985 table = dm_get_live_table(md, &srcu_idx); in dm_call_pr()
3000 dm_put_live_table(md, srcu_idx); in dm_call_pr()
3045 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_reserve() local
3049 r = dm_prepare_ioctl(md, &srcu_idx, &bdev); in dm_pr_reserve()
3059 dm_unprepare_ioctl(md, srcu_idx); in dm_pr_reserve()
3065 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_release() local
3069 r = dm_prepare_ioctl(md, &srcu_idx, &bdev); in dm_pr_release()
3079 dm_unprepare_ioctl(md, srcu_idx); in dm_pr_release()
3086 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_preempt() local
3090 r = dm_prepare_ioctl(md, &srcu_idx, &bdev); in dm_pr_preempt()
3100 dm_unprepare_ioctl(md, srcu_idx); in dm_pr_preempt()
3106 struct mapped_device *md = bdev->bd_disk->private_data; in dm_pr_clear() local
3110 r = dm_prepare_ioctl(md, &srcu_idx, &bdev); in dm_pr_clear()
3120 dm_unprepare_ioctl(md, srcu_idx); in dm_pr_clear()