return ret;
}
+static int load_super_root(struct btrfs_root *root, u64 bytenr, u64 gen, int level)
+{
+ int ret = 0;
+
+ root->node = read_tree_block(root->fs_info, bytenr,
+ root->root_key.objectid, gen, level, NULL);
+ if (IS_ERR(root->node)) {
+ ret = PTR_ERR(root->node);
+ root->node = NULL;
+ } else if (!extent_buffer_uptodate(root->node)) {
+ free_extent_buffer(root->node);
+ root->node = NULL;
+ ret = -EIO;
+ }
+
+ if (ret)
+ return ret;
+
+ btrfs_set_root_node(&root->root_item, root->node);
+ root->commit_root = btrfs_root_node(root);
+ btrfs_set_root_refs(&root->root_item, 1);
+ return ret;
+}
+
+static int load_important_roots(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_super_block *sb = fs_info->super_copy;
+ u64 gen, bytenr;
+ int level, ret;
+
+ bytenr = btrfs_super_root(sb);
+ gen = btrfs_super_generation(sb);
+ level = btrfs_super_root_level(sb);
+ ret = load_super_root(fs_info->tree_root, bytenr, gen, level);
+ if (ret)
+ btrfs_warn(fs_info, "couldn't read tree root");
+ return ret;
+}
+
static int __cold init_tree_roots(struct btrfs_fs_info *fs_info)
{
int backup_index = find_newest_super_backup(fs_info);
int i;
for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
- u64 generation;
- int level;
-
if (handle_error) {
if (!IS_ERR(tree_root->node))
free_extent_buffer(tree_root->node);
if (ret < 0)
return ret;
}
- generation = btrfs_super_generation(sb);
- level = btrfs_super_root_level(sb);
- tree_root->node = read_tree_block(fs_info, btrfs_super_root(sb),
- BTRFS_ROOT_TREE_OBJECTID,
- generation, level, NULL);
- if (IS_ERR(tree_root->node)) {
- handle_error = true;
- ret = PTR_ERR(tree_root->node);
- tree_root->node = NULL;
- btrfs_warn(fs_info, "couldn't read tree root");
- continue;
- } else if (!extent_buffer_uptodate(tree_root->node)) {
+ ret = load_important_roots(fs_info);
+ if (ret) {
handle_error = true;
- ret = -EIO;
- btrfs_warn(fs_info, "error while reading tree root");
continue;
}
- btrfs_set_root_node(&tree_root->root_item, tree_root->node);
- tree_root->commit_root = btrfs_root_node(tree_root);
- btrfs_set_root_refs(&tree_root->root_item, 1);
-
/*
* No need to hold btrfs_root::objectid_mutex since the fs
* hasn't been fully initialised and we are the only user
}
/* All successful */
- fs_info->generation = generation;
- fs_info->last_trans_committed = generation;
+ fs_info->generation = btrfs_header_generation(tree_root->node);
+ fs_info->last_trans_committed = fs_info->generation;
fs_info->last_reloc_trans = 0;
/* Always begin writing backup roots after the one being used */
generation = btrfs_super_chunk_root_generation(disk_super);
level = btrfs_super_chunk_root_level(disk_super);
-
- chunk_root->node = read_tree_block(fs_info,
- btrfs_super_chunk_root(disk_super),
- BTRFS_CHUNK_TREE_OBJECTID,
- generation, level, NULL);
- if (IS_ERR(chunk_root->node) ||
- !extent_buffer_uptodate(chunk_root->node)) {
+ ret = load_super_root(chunk_root, btrfs_super_chunk_root(disk_super),
+ generation, level);
+ if (ret) {
btrfs_err(fs_info, "failed to read chunk root");
- if (!IS_ERR(chunk_root->node))
- free_extent_buffer(chunk_root->node);
- chunk_root->node = NULL;
goto fail_tree_roots;
}
- btrfs_set_root_node(&chunk_root->root_item, chunk_root->node);
- chunk_root->commit_root = btrfs_root_node(chunk_root);
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
offsetof(struct btrfs_header, chunk_tree_uuid),