struct btrfs_key *key,
struct btrfs_path *path, int lowest)
{
- struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
struct btrfs_backref_node *upper;
struct btrfs_backref_edge *edge;
struct btrfs_backref_edge *edges[BTRFS_MAX_LEVEL - 1];
struct extent_buffer *eb;
u32 blocksize;
u64 bytenr;
- u64 generation;
int slot;
int ret;
int err = 0;
path->lowest_level = node->level + 1;
rc->backref_cache.path[node->level] = node;
list_for_each_entry(edge, &node->upper, list[LOWER]) {
- struct btrfs_key first_key;
struct btrfs_ref ref = { 0 };
cond_resched();
}
blocksize = root->fs_info->nodesize;
- generation = btrfs_node_ptr_generation(upper->eb, slot);
- btrfs_node_key_to_cpu(upper->eb, &first_key, slot);
- eb = read_tree_block(fs_info, bytenr, generation,
- upper->level - 1, &first_key);
+ eb = btrfs_read_node_slot(upper->eb, slot);
if (IS_ERR(eb)) {
err = PTR_ERR(eb);
goto next;
- } else if (!extent_buffer_uptodate(eb)) {
- free_extent_buffer(eb);
- err = -EIO;
- goto next;
}
btrfs_tree_lock(eb);