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update mkfs.btrfs for the new space balancing code 

The new space balancing code needs a subvol to store the
temporary inode for data extent relocation.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
master
Zheng Yan 2008-09-26 10:26:53 -04:00 committed by Chris Mason
parent 428b7fa630
commit 09ab0365ff
1 changed files with 29 additions and 0 deletions
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29
mkfs.c
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@ -232,6 +232,32 @@ static int create_raid_groups(struct btrfs_trans_handle *trans,
return 0;
}
static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_key location;
struct btrfs_root_item root_item;
struct extent_buffer *tmp;
u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
int ret;
ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
BUG_ON(ret);
memcpy(&root_item, &root->root_item, sizeof(root_item));
btrfs_set_root_bytenr(&root_item, tmp->start);
btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
free_extent_buffer(tmp);
location.objectid = objectid;
location.type = BTRFS_ROOT_ITEM_KEY;
location.offset = trans->transid;
ret = btrfs_insert_root(trans, root->fs_info->tree_root,
&location, &root_item);
BUG_ON(ret);
return 0;
}
static void print_usage(void)
{
fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n");
@ -459,6 +485,9 @@ raid_groups:
metadata_profile);
BUG_ON(ret);
ret = create_data_reloc_tree(trans, root);
BUG_ON(ret);
printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
"sectorsize %u size %s\n",
label, first_file, nodesize, leafsize, sectorsize,