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btrfs-progs: check: introduce repair_chunk_item() 

Because this patchset concentrates on repair of extent tree,
repair_chunk_item() now only inserts missed chunk group item into
extent tree.

There are some things left TODO, for example dev_item fix.

Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Su Yue 2017-09-01 14:22:37 +08:00 committed by David Sterba
parent e3541e93e8
commit a8ede30f93
1 changed files with 45 additions and 0 deletions
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45
cmds-check.c
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@ -12642,6 +12642,49 @@ out:
return err;
}
/*
* Add block group item to the extent tree if @err contains REFERENCER_MISSING.
* FIXME: We still need to repair error of dev_item.
*
* Returns error after repair.
*/
static int repair_chunk_item(struct btrfs_trans_handle *trans,
struct btrfs_root *chunk_root,
struct btrfs_path *path, int err)
{
struct btrfs_chunk *chunk;
struct btrfs_key chunk_key;
struct extent_buffer *eb = path->nodes[0];
u64 length;
int slot = path->slots[0];
u64 type;
int ret = 0;
btrfs_item_key_to_cpu(eb, &chunk_key, slot);
if (chunk_key.type != BTRFS_CHUNK_ITEM_KEY)
return err;
chunk = btrfs_item_ptr(eb, slot, struct btrfs_chunk);
type = btrfs_chunk_type(path->nodes[0], chunk);
length = btrfs_chunk_length(eb, chunk);
if (err & REFERENCER_MISSING) {
ret = btrfs_make_block_group(trans, chunk_root->fs_info, 0,
type, chunk_key.objectid, chunk_key.offset, length);
if (ret) {
error("fail to add block group item[%llu %llu]",
chunk_key.offset, length);
goto out;
} else {
err &= ~REFERENCER_MISSING;
printf("Added block group item[%llu %llu]\n",
chunk_key.offset, length);
}
}
out:
return err;
}
/*
* Check a chunk item.
* Including checking all referred dev_extents and block group
@ -12829,6 +12872,8 @@ again:
break;
case BTRFS_CHUNK_ITEM_KEY:
ret = check_chunk_item(fs_info, eb, slot);
if (repair && ret)
ret = repair_chunk_item(trans, root, path, ret);
err |= ret;
break;
case BTRFS_DEV_EXTENT_KEY: