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btrfs: change block mapping to switch/case in btrfs_map_block 

Now that all the per-profile if/else statement blocks have been
converted to calls to helper the conversion to switch/case is
straightforward.

Reviewed-by: Christoph Hellwig <hch@lst.de>
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 06:43:05 -08:00 committed by David Sterba
parent a16fb8c6f6
commit b55b307785
1 changed files with 16 additions and 6 deletions
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22
fs/btrfs/volumes.c
View File

@ -6575,26 +6575,36 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
if (!dev_replace_is_ongoing)
up_read(&dev_replace->rwsem);
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case BTRFS_BLOCK_GROUP_RAID0:
map_blocks_raid0(map, &io_geom);
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
break;
case BTRFS_BLOCK_GROUP_RAID1:
case BTRFS_BLOCK_GROUP_RAID1C3:
case BTRFS_BLOCK_GROUP_RAID1C4:
map_blocks_raid1(fs_info, map, &io_geom, dev_replace_is_ongoing);
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
break;
case BTRFS_BLOCK_GROUP_DUP:
map_blocks_dup(map, &io_geom);
} else if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
break;
case BTRFS_BLOCK_GROUP_RAID10:
map_blocks_raid10(fs_info, map, &io_geom, dev_replace_is_ongoing);
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
break;
case BTRFS_BLOCK_GROUP_RAID5:
case BTRFS_BLOCK_GROUP_RAID6:
if (op != BTRFS_MAP_READ || io_geom.mirror_num > 1)
map_blocks_raid56_write(map, &io_geom, logical, length);
else
map_blocks_raid56_read(map, &io_geom);
} else {
break;
default:
/*
* After this, stripe_nr is the number of stripes on this
* device we have to walk to find the data, and stripe_index is
* the number of our device in the stripe array
*/
map_blocks_single(map, &io_geom);
break;
}
if (io_geom.stripe_index >= map->num_stripes) {
btrfs_crit(fs_info,