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Btrfs: create a logical->phsyical block number mapping scheme

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-04-11 15:53:25 -04:00
committed by David Woodhouse
parent 0bd93ba022
commit 7eccb903a8
7 changed files with 134 additions and 68 deletions
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6
fs/btrfs/super.c
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@@ -1700,7 +1700,7 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
leaf = btrfs_buffer_leaf(subvol);
btrfs_set_header_nritems(&leaf->header, 0);
btrfs_set_header_level(&leaf->header, 0);
btrfs_set_header_blocknr(&leaf->header, subvol->b_blocknr);
btrfs_set_header_blocknr(&leaf->header, bh_blocknr(subvol));
btrfs_set_header_generation(&leaf->header, trans->transid);
memcpy(leaf->header.fsid, root->fs_info->disk_super->fsid,
sizeof(leaf->header.fsid));
@@ -1713,7 +1713,7 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
btrfs_set_inode_nblocks(inode_item, 1);
btrfs_set_inode_mode(inode_item, S_IFDIR | 0755);
btrfs_set_root_blocknr(&root_item, subvol->b_blocknr);
btrfs_set_root_blocknr(&root_item, bh_blocknr(subvol));
btrfs_set_root_refs(&root_item, 1);
mark_buffer_dirty(subvol);
@@ -1803,7 +1803,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
key.offset = 1;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
btrfs_set_root_blocknr(&new_root_item, root->node->b_blocknr);
btrfs_set_root_blocknr(&new_root_item, bh_blocknr(root->node));
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);