@@ -4021,10 +4021,13 @@ static void free_extent_record_cache(struct cache_tree *extent_cache)
static int maybe_free_extent_rec(struct cache_tree *extent_cache,
struct extent_record *rec)
{
+ u64 super_gen = btrfs_super_generation(global_info->super_copy);
+
if (rec->content_checked && rec->owner_ref_checked &&
rec->extent_item_refs == rec->refs && rec->refs > 0 &&
rec->num_duplicates == 0 && !all_backpointers_checked(rec, 0) &&
!rec->bad_full_backref && !rec->crossing_stripes &&
+ rec->generation <= super_gen + 1 &&
!rec->wrong_chunk_type) {
remove_cache_extent(extent_cache, &rec->cache);
free_all_extent_backrefs(rec);
@@ -7857,6 +7860,7 @@ static int check_extent_refs(struct btrfs_root *root,
{
struct extent_record *rec;
struct cache_extent *cache;
+ u64 super_gen = btrfs_super_generation(root->fs_info->super_copy);
int ret = 0;
int had_dups = 0;
int err = 0;
@@ -7939,6 +7943,13 @@ static int check_extent_refs(struct btrfs_root *root,
cur_err = 1;
}
+ if (rec->generation > super_gen + 1) {
+ error(
+ "invalid generation for extent %llu, have %llu expect (0, %llu]",
+ rec->start, rec->generation,
+ super_gen + 1);
+ cur_err = 1;
+ }
if (rec->refs != rec->extent_item_refs) {
fprintf(stderr, "ref mismatch on [%llu %llu] ",
(unsigned long long)rec->start,
Much like what we have done in lowmem mode, also detect and report invalid extent generation in original mode. Unlike lowmem mode, we have extent_record::generation, which is the higher number of generations in EXTENT_ITEM, EXTENT_DATA or tree block header, so there is no need to check generations in different locations. For repair, we still need to depend on --init-extent-tree, as directly modifying extent items can easily cause conflicts with delayed refs, thus it should be avoided. Signed-off-by: Qu Wenruo <wqu@suse.com> --- check/main.c | 11 +++++++++++ 1 file changed, 11 insertions(+)