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| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2023-12-13 06:42:58 -0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-12-15 23:03:58 +0100 |
| commit | 30e8534b538e8e7372e49516a8cddacdfd80f863 (patch) | |
| tree | 8622f1f64bd8f91254c72af1468b551b8dd5d135 /fs/btrfs/volumes.c | |
| parent | fd747f2d5f9bdf16b65326be9742338c770ba35f (diff) | |
| download | linux-30e8534b538e8e7372e49516a8cddacdfd80f863.tar.gz linux-30e8534b538e8e7372e49516a8cddacdfd80f863.tar.bz2 linux-30e8534b538e8e7372e49516a8cddacdfd80f863.zip | |
btrfs: factor out block-mapping for RAID0
Now that we have a container for the I/O geometry that has all the needed
information for the block mappings of RAID0, factor out a helper calculating
this information.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e3f75ede9174..21a53acd52ac 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6362,6 +6362,15 @@ static bool is_single_device_io(struct btrfs_fs_info *fs_info, return true; } +static void map_blocks_raid0(const struct btrfs_chunk_map *map, + struct btrfs_io_geometry *io_geom) +{ + io_geom->stripe_index = io_geom->stripe_nr % map->num_stripes; + io_geom->stripe_nr /= map->num_stripes; + if (io_geom->op == BTRFS_MAP_READ) + io_geom->mirror_num = 1; +} + /* * Map one logical range to one or more physical ranges. * @@ -6449,10 +6458,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, up_read(&dev_replace->rwsem); if (map->type & BTRFS_BLOCK_GROUP_RAID0) { - io_geom.stripe_index = io_geom.stripe_nr % map->num_stripes; - io_geom.stripe_nr /= map->num_stripes; - if (op == BTRFS_MAP_READ) - io_geom.mirror_num = 1; + map_blocks_raid0(map, &io_geom); } else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) { if (op != BTRFS_MAP_READ) { io_geom.num_stripes = map->num_stripes; |