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btrfs-progs: Add helper function find_file_name/type for nlink and inode_item repair.

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Add find_file_name() and find_file_type() function for later nlink and
inode_item repair.

Later nlink repair will use both function and and inode_item repair will
use find_file_type().

They are done by searching the backref list, dir_item/index for type
search and dir_item/index or inode_ref for name search.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Qu Wenruo 2014-12-09 16:27:28 +08:00 committed by David Sterba
parent 1c4d47c037
commit 15bc913158
1 changed files with 41 additions and 0 deletions
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41
cmds-check.c
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@ -1874,6 +1874,47 @@ static int repair_inode_backrefs(struct btrfs_root *root,
return ret ? ret : repaired;
}
/*
* To determine the file type for nlink/inode_item repair
*
* Return 0 if file type is found and BTRFS_FT_* is stored into type.
* Return -ENOENT if file type is not found.
*/
static int find_file_type(struct inode_record *rec, u8 *type)
{
struct inode_backref *backref;
list_for_each_entry(backref, &rec->backrefs, list) {
if (backref->found_dir_index || backref->found_dir_item) {
*type = backref->filetype;
return 0;
}
}
return -ENOENT;
}
/*
* To determine the file name for nlink repair
*
* Return 0 if file name is found, set name and namelen.
* Return -ENOENT if file name is not found.
*/
static int find_file_name(struct inode_record *rec,
char *name, int *namelen)
{
struct inode_backref *backref;
list_for_each_entry(backref, &rec->backrefs, list) {
if (backref->found_dir_index || backref->found_dir_item ||
backref->found_inode_ref) {
memcpy(name, backref->name, backref->namelen);
*namelen = backref->namelen;
return 0;
}
}
return -ENOENT;
}
static int try_repair_inode(struct btrfs_root *root, struct inode_record *rec)
{
struct btrfs_trans_handle *trans;