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Btrfs: Metadata reservation for orphan inodes

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reserve metadata space for handling orphan inodes

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2010-05-16 10:49:58 -04:00
committed by Chris Mason
parent 8929ecfa50
commit d68fc57b7e
9 changed files with 367 additions and 68 deletions
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23
fs/btrfs/root-tree.c
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@@ -259,6 +259,8 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
struct extent_buffer *leaf;
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_key root_key;
struct btrfs_root *root;
int err = 0;
int ret;
@@ -270,6 +272,9 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
key.type = BTRFS_ORPHAN_ITEM_KEY;
key.offset = 0;
root_key.type = BTRFS_ROOT_ITEM_KEY;
root_key.offset = (u64)-1;
while (1) {
ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0);
if (ret < 0) {
@@ -294,13 +299,25 @@ int btrfs_find_orphan_roots(struct btrfs_root *tree_root)
key.type != BTRFS_ORPHAN_ITEM_KEY)
break;
ret = btrfs_find_dead_roots(tree_root, key.offset);
if (ret) {
root_key.objectid = key.offset;
key.offset++;
root = btrfs_read_fs_root_no_name(tree_root->fs_info,
&root_key);
if (!IS_ERR(root))
continue;
ret = PTR_ERR(root);
if (ret != -ENOENT) {
err = ret;
break;
}
key.offset++;
ret = btrfs_find_dead_roots(tree_root, root_key.objectid);
if (ret) {
err = ret;
break;
}
}
btrfs_free_path(path);