return ret;
}
+struct node_refs {
+ u64 bytenr[BTRFS_MAX_LEVEL];
+ u64 refs[BTRFS_MAX_LEVEL];
+};
+
static int walk_down_tree(struct btrfs_root *root, struct btrfs_path *path,
- struct walk_control *wc, int *level)
+ struct walk_control *wc, int *level,
+ struct node_refs *nrefs)
{
enum btrfs_tree_block_status status;
u64 bytenr;
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
- ret = btrfs_lookup_extent_info(NULL, root,
+
+ if (path->nodes[*level]->start == nrefs->bytenr[*level]) {
+ refs = nrefs->refs[*level];
+ ret = 0;
+ } else {
+ ret = btrfs_lookup_extent_info(NULL, root,
path->nodes[*level]->start,
*level, 1, &refs, NULL);
- if (ret < 0) {
- err = ret;
- goto out;
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
+ nrefs->bytenr[*level] = path->nodes[*level]->start;
+ nrefs->refs[*level] = refs;
}
if (refs > 1) {
bytenr = btrfs_node_blockptr(cur, path->slots[*level]);
ptr_gen = btrfs_node_ptr_generation(cur, path->slots[*level]);
blocksize = root->nodesize;
- ret = btrfs_lookup_extent_info(NULL, root, bytenr, *level - 1,
- 1, &refs, NULL);
- if (ret < 0)
- refs = 0;
+
+ if (bytenr == nrefs->bytenr[*level - 1]) {
+ refs = nrefs->refs[*level - 1];
+ } else {
+ ret = btrfs_lookup_extent_info(NULL, root, bytenr,
+ *level - 1, 1, &refs, NULL);
+ if (ret < 0) {
+ refs = 0;
+ } else {
+ nrefs->bytenr[*level - 1] = bytenr;
+ nrefs->refs[*level - 1] = refs;
+ }
+ }
if (refs > 1) {
ret = enter_shared_node(root, bytenr, refs,
struct orphan_data_extent *orphan;
struct orphan_data_extent *tmp;
enum btrfs_tree_block_status status;
+ struct node_refs nrefs;
/*
* Reuse the corrupt_block cache tree to record corrupted tree block
memset(&root_node, 0, sizeof(root_node));
cache_tree_init(&root_node.root_cache);
cache_tree_init(&root_node.inode_cache);
+ memset(&nrefs, 0, sizeof(nrefs));
/* Move the orphan extent record to corresponding inode_record */
list_for_each_entry_safe(orphan, tmp,
}
while (1) {
- wret = walk_down_tree(root, &path, wc, &level);
+ wret = walk_down_tree(root, &path, wc, &level, &nrefs);
if (wret < 0)
ret = wret;
if (wret != 0)