1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright (c) 2021-2024 Oracle.  All Rights Reserved.
 4 * Author: Darrick J. Wong <djwong@kernel.org>
 5 */
 6#ifndef __XFS_SCRUB_ORPHANAGE_H__
 7#define __XFS_SCRUB_ORPHANAGE_H__
 8
 9#ifdef CONFIG_XFS_ONLINE_REPAIR
10int xrep_orphanage_create(struct xfs_scrub *sc);
11
12/*
13 * If we're doing a repair, ensure that the orphanage exists and attach it to
14 * the scrub context.
15 */
16static inline int
17xrep_orphanage_try_create(
18	struct xfs_scrub	*sc)
19{
20	int			error;
21
22	ASSERT(sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR);
23
24	error = xrep_orphanage_create(sc);
25	switch (error) {
26	case 0:
27	case -ENOENT:
28	case -ENOTDIR:
29	case -ENOSPC:
30		/*
31		 * If the orphanage can't be found or isn't a directory, we'll
32		 * keep going, but we won't be able to attach the file to the
33		 * orphanage if we can't find the parent.
34		 */
35		return 0;
36	}
37
38	return error;
39}
40
41int xrep_orphanage_iolock_two(struct xfs_scrub *sc);
42
43void xrep_orphanage_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
44bool xrep_orphanage_ilock_nowait(struct xfs_scrub *sc,
45		unsigned int ilock_flags);
46void xrep_orphanage_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);
47
48void xrep_orphanage_rele(struct xfs_scrub *sc);
49
50/* Information about a request to add a file to the orphanage. */
51struct xrep_adoption {
52	struct xfs_scrub	*sc;
53
54	/* Name used for the adoption. */
55	struct xfs_name		*xname;
56
57	/* Parent pointer context tracking */
58	struct xfs_parent_args	ppargs;
59
60	/* Block reservations for orphanage and child (if directory). */
61	unsigned int		orphanage_blkres;
62	unsigned int		child_blkres;
63
64	/*
65	 * Does the caller want us to bump the child link count?  This is not
66	 * needed when reattaching files that have become disconnected but have
67	 * nlink > 1.  It is necessary when changing the directory tree
68	 * structure.
69	 */
70	bool			bump_child_nlink:1;
71};
72
73bool xrep_orphanage_can_adopt(struct xfs_scrub *sc);
74
75int xrep_adoption_trans_alloc(struct xfs_scrub *sc,
76		struct xrep_adoption *adopt);
77int xrep_adoption_compute_name(struct xrep_adoption *adopt,
78		struct xfs_name *xname);
79int xrep_adoption_move(struct xrep_adoption *adopt);
80int xrep_adoption_trans_roll(struct xrep_adoption *adopt);
81#else
82struct xrep_adoption { /* empty */ };
83# define xrep_orphanage_rele(sc)	((void)0)
84#endif /* CONFIG_XFS_ONLINE_REPAIR */
85
86#endif /* __XFS_SCRUB_ORPHANAGE_H__ */