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btrfs-progs: check/original: Check and repair root item geneartion

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Add such ability to original mode to fix root generation mismatch, which
can be rejected by kernel.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2019-08-12 14:34:21 +08:00 committed by David Sterba
parent ebf29e39c3
commit 1baf729743
1 changed files with 21 additions and 0 deletions
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21
check/main.c
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@ -3437,8 +3437,10 @@ static int check_fs_root(struct btrfs_root *root,
{
int ret = 0;
int err = 0;
bool generation_err = false;
int wret;
int level;
u64 super_generation;
struct btrfs_path path;
struct shared_node root_node;
struct root_record *rec;
@ -3449,6 +3451,23 @@ static int check_fs_root(struct btrfs_root *root,
struct unaligned_extent_rec_t *urec;
struct unaligned_extent_rec_t *tmp;
super_generation = btrfs_super_generation(root->fs_info->super_copy);
if (btrfs_root_generation(root_item) > super_generation + 1) {
error(
"invalid generation for root %llu, have %llu expect (0, %llu]",
root->root_key.objectid, btrfs_root_generation(root_item),
super_generation + 1);
generation_err = true;
if (repair) {
root->node->flags |= EXTENT_BAD_TRANSID;
ret = recow_extent_buffer(root, root->node);
if (!ret) {
printf("Reset generation for root %llu\n",
root->root_key.objectid);
generation_err = false;
}
}
}
/*
* Reuse the corrupt_block cache tree to record corrupted tree block
*
@ -3597,6 +3616,8 @@ skip_walking:
free_corrupt_blocks_tree(&corrupt_blocks);
root->fs_info->corrupt_blocks = NULL;
if (!ret && generation_err)
ret = -1;
return ret;
}