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btrfs-progs: check/original: add ability to repair extent item generation

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This is pretty much the same as for lowmem mode, it will try to reset
the extent item generation using either the tree block generation or
current transid.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2020-08-11 19:44:50 +08:00 committed by David Sterba
parent b858e3b5c2
commit 05f25a1460
1 changed files with 69 additions and 4 deletions
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73
check/main.c
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@ -7915,6 +7915,62 @@ static int record_unaligned_extent_rec(struct extent_record *rec)
return ret;
}
static int repair_extent_item_generation(struct extent_record *rec)
{
struct btrfs_trans_handle *trans;
struct btrfs_path path;
struct btrfs_key key;
struct btrfs_extent_item *ei;
struct btrfs_root *extent_root = gfs_info->extent_root;
u64 new_gen = 0;;
int ret;
key.objectid = rec->start;
key.type = BTRFS_METADATA_ITEM_KEY;
key.offset = (u64)-1;
get_extent_item_generation(rec->start, &new_gen);
trans = btrfs_start_transaction(extent_root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
errno = -ret;
error("failed to start transaction: %m");
return ret;
}
btrfs_init_path(&path);
ret = btrfs_search_slot(trans, extent_root, &key, &path, 0, 1);
/* Not possible */
if (ret == 0)
ret = -EUCLEAN;
if (ret < 0)
goto out;
ret = btrfs_previous_extent_item(extent_root, &path, rec->start);
if (ret > 0)
ret = -ENOENT;
if (ret < 0)
goto out;
if (!new_gen)
new_gen = trans->transid;
ei = btrfs_item_ptr(path.nodes[0], path.slots[0],
struct btrfs_extent_item);
btrfs_set_extent_generation(path.nodes[0], ei, new_gen);
ret = btrfs_commit_transaction(trans, extent_root);
if (ret < 0) {
errno = -ret;
error("failed to commit transaction: %m");
goto out;
}
printf("Reset extent item (%llu) generation to %llu\n",
key.objectid, new_gen);
rec->generation = new_gen;
out:
btrfs_release_path(&path);
if (ret < 0)
btrfs_abort_transaction(trans, ret);
return ret;
}
static int check_extent_refs(struct btrfs_root *root,
struct cache_tree *extent_cache)
{
@ -8005,11 +8061,20 @@ static int check_extent_refs(struct btrfs_root *root,
}
if (rec->generation > super_gen + 1) {
error(
bool repaired = false;
if (repair) {
ret = repair_extent_item_generation(rec);
if (ret == 0)
repaired = true;
}
if (!repaired) {
error(
"invalid generation for extent %llu, have %llu expect (0, %llu]",
rec->start, rec->generation,
super_gen + 1);
cur_err = 1;
rec->start, rec->generation,
super_gen + 1);
cur_err = 1;
}
}
if (rec->refs != rec->extent_item_refs) {
fprintf(stderr, "ref mismatch on [%llu %llu] ",