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btrfs: convert btrfs_get_global_root to use a switch statement 

Use a switch statement instead of an endless chain of if statements
to make the code a little cleaner.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2023-05-23 10:40:19 +02:00 committed by David Sterba
parent 85724171b3
commit e91909aace
1 changed files with 13 additions and 10 deletions
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23
fs/btrfs/disk-io.c
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@ -1172,25 +1172,28 @@ static struct btrfs_root *btrfs_get_global_root(struct btrfs_fs_info *fs_info,
.offset = 0,
};
if (objectid == BTRFS_ROOT_TREE_OBJECTID)
switch (objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
return btrfs_grab_root(fs_info->tree_root);
if (objectid == BTRFS_EXTENT_TREE_OBJECTID)
case BTRFS_EXTENT_TREE_OBJECTID:
return btrfs_grab_root(btrfs_global_root(fs_info, &key));
if (objectid == BTRFS_CHUNK_TREE_OBJECTID)
case BTRFS_CHUNK_TREE_OBJECTID:
return btrfs_grab_root(fs_info->chunk_root);
if (objectid == BTRFS_DEV_TREE_OBJECTID)
case BTRFS_DEV_TREE_OBJECTID:
return btrfs_grab_root(fs_info->dev_root);
if (objectid == BTRFS_CSUM_TREE_OBJECTID)
case BTRFS_CSUM_TREE_OBJECTID:
return btrfs_grab_root(btrfs_global_root(fs_info, &key));
if (objectid == BTRFS_QUOTA_TREE_OBJECTID)
case BTRFS_QUOTA_TREE_OBJECTID:
return btrfs_grab_root(fs_info->quota_root);
if (objectid == BTRFS_UUID_TREE_OBJECTID)
case BTRFS_UUID_TREE_OBJECTID:
return btrfs_grab_root(fs_info->uuid_root);
if (objectid == BTRFS_BLOCK_GROUP_TREE_OBJECTID)
case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
return btrfs_grab_root(fs_info->block_group_root);
if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
case BTRFS_FREE_SPACE_TREE_OBJECTID:
return btrfs_grab_root(btrfs_global_root(fs_info, &key));
return NULL;
default:
return NULL;
}
}
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,