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Btrfs: Btree defrag on the extent-mapping tree as well

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-08-10 14:06:19 -04:00
committed by David Woodhouse
parent 409eb95d7f
commit e9d0b13b5b
8 changed files with 125 additions and 79 deletions
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28
fs/btrfs/extent-tree.c
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@@ -396,6 +396,14 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
return 0;
}
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
finish_current_insert(trans, root->fs_info->extent_root);
del_pending_extents(trans, root->fs_info->extent_root);
return 0;
}
static int lookup_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 blocknr,
u64 num_blocks, u32 *refs)
@@ -1374,7 +1382,25 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
BUG_ON(ret);
continue;
}
next = read_tree_block(root, blocknr);
next = btrfs_find_tree_block(root, blocknr);
if (!next || !buffer_uptodate(next)) {
brelse(next);
mutex_unlock(&root->fs_info->fs_mutex);
next = read_tree_block(root, blocknr);
mutex_lock(&root->fs_info->fs_mutex);
/* we dropped the lock, check one more time */
ret = lookup_extent_ref(trans, root, blocknr, 1, &refs);
BUG_ON(ret);
if (refs != 1) {
path->slots[*level]++;
brelse(next);
ret = btrfs_free_extent(trans, root,
blocknr, 1, 1);
BUG_ON(ret);
continue;
}
}
WARN_ON(*level <= 0);
if (path->nodes[*level-1])
btrfs_block_release(root, path->nodes[*level-1]);