/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (c) 2020-2024 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <djwong@kernel.org>
 */
#ifndef __XFS_SCRUB_FINDPARENT_H__
#define __XFS_SCRUB_FINDPARENT_H__

struct xrep_parent_scan_info {
        struct xfs_scrub        *sc;

        /* Inode scan cursor. */
        struct xchk_iscan       iscan;

        /* Hook to capture directory entry updates. */
        struct xfs_dir_hook     dhook;

        /* Lock protecting parent_ino. */
        struct mutex            lock;

        /* Parent inode that we've found. */
        xfs_ino_t               parent_ino;

        bool                    lookup_parent;
};

int __xrep_findparent_scan_start(struct xfs_scrub *sc,
                struct xrep_parent_scan_info *pscan,
                notifier_fn_t custom_fn);
static inline int xrep_findparent_scan_start(struct xfs_scrub *sc,
                struct xrep_parent_scan_info *pscan)
{
        return __xrep_findparent_scan_start(sc, pscan, NULL);
}
int xrep_findparent_scan(struct xrep_parent_scan_info *pscan);
void xrep_findparent_scan_teardown(struct xrep_parent_scan_info *pscan);

static inline void
xrep_findparent_scan_found(
        struct xrep_parent_scan_info    *pscan,
        xfs_ino_t                       ino)
{
        mutex_lock(&pscan->lock);
        pscan->parent_ino = ino;
        mutex_unlock(&pscan->lock);
}

void xrep_findparent_scan_finish_early(struct xrep_parent_scan_info *pscan,
                xfs_ino_t ino);

int xrep_findparent_confirm(struct xfs_scrub *sc, xfs_ino_t *parent_ino);

xfs_ino_t xrep_findparent_self_reference(struct xfs_scrub *sc);
xfs_ino_t xrep_findparent_from_dcache(struct xfs_scrub *sc);

#endif /* __XFS_SCRUB_FINDPARENT_H__ */