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btrfs: factor out RAID1 block mapping
Now that we have a container for the I/O geometry that has all the needed information for the block mappings of RAID1, 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>
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1 changed files with 21 additions and 10 deletions
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@ -6371,6 +6371,26 @@ static void map_blocks_raid0(const struct btrfs_chunk_map *map,
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io_geom->mirror_num = 1;
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}
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static void map_blocks_raid1(struct btrfs_fs_info *fs_info,
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struct btrfs_chunk_map *map,
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struct btrfs_io_geometry *io_geom,
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bool dev_replace_is_ongoing)
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{
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if (io_geom->op != BTRFS_MAP_READ) {
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io_geom->num_stripes = map->num_stripes;
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return;
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}
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if (io_geom->mirror_num) {
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io_geom->stripe_index = io_geom->mirror_num - 1;
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return;
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}
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io_geom->stripe_index = find_live_mirror(fs_info, map, 0,
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dev_replace_is_ongoing);
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io_geom->mirror_num = io_geom->stripe_index + 1;
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}
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/*
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* Map one logical range to one or more physical ranges.
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*
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@ -6460,16 +6480,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
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map_blocks_raid0(map, &io_geom);
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} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
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if (op != BTRFS_MAP_READ) {
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io_geom.num_stripes = map->num_stripes;
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} else if (io_geom.mirror_num) {
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io_geom.stripe_index = io_geom.mirror_num - 1;
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} else {
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io_geom.stripe_index = find_live_mirror(fs_info, map, 0,
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dev_replace_is_ongoing);
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io_geom.mirror_num = io_geom.stripe_index + 1;
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}
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map_blocks_raid1(fs_info, map, &io_geom, dev_replace_is_ongoing);
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} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
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if (op != BTRFS_MAP_READ) {
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io_geom.num_stripes = map->num_stripes;
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