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btrfs: factor out block mapping for single profiles 

Now that we have a container for the I/O geometry that has all the needed
information for the block mappings of SINGLE profiles, 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>
This commit is contained in:
Johannes Thumshirn 2023-12-13 06:43:04 -08:00 committed by David Sterba
parent 089221d345
commit a16fb8c6f6
1 changed files with 9 additions and 3 deletions
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12
fs/btrfs/volumes.c
View File

@ -6484,6 +6484,14 @@ static void map_blocks_raid56_read(struct btrfs_chunk_map *map,
io_geom->mirror_num = 1;
}
static void map_blocks_single(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;
io_geom->mirror_num = io_geom->stripe_index + 1;
}
/*
* Map one logical range to one or more physical ranges.
*
@ -6586,9 +6594,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
* device we have to walk to find the data, and stripe_index is
* the number of our device in the stripe array
*/
io_geom.stripe_index = io_geom.stripe_nr % map->num_stripes;
io_geom.stripe_nr /= map->num_stripes;
io_geom.mirror_num = io_geom.stripe_index + 1;
map_blocks_single(map, &io_geom);
}
if (io_geom.stripe_index >= map->num_stripes) {
btrfs_crit(fs_info,