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3f31406aef
Repair corruptions in the directory tree itself. Cycles are broken by removing an incoming parent->child link. Multiply-owned directories are fixed by pruning the extra parent -> child links Disconnected subtrees are reconnected to the lost and found. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2021-2024 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#ifndef __XFS_SCRUB_ORPHANAGE_H__
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#define __XFS_SCRUB_ORPHANAGE_H__
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#ifdef CONFIG_XFS_ONLINE_REPAIR
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int xrep_orphanage_create(struct xfs_scrub *sc);
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/*
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* If we're doing a repair, ensure that the orphanage exists and attach it to
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* the scrub context.
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*/
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static inline int
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xrep_orphanage_try_create(
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struct xfs_scrub *sc)
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{
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int error;
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ASSERT(sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR);
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error = xrep_orphanage_create(sc);
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switch (error) {
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case 0:
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case -ENOENT:
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case -ENOTDIR:
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case -ENOSPC:
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/*
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* If the orphanage can't be found or isn't a directory, we'll
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* keep going, but we won't be able to attach the file to the
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* orphanage if we can't find the parent.
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*/
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return 0;
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}
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return error;
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}
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int xrep_orphanage_iolock_two(struct xfs_scrub *sc);
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void xrep_orphanage_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
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bool xrep_orphanage_ilock_nowait(struct xfs_scrub *sc,
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unsigned int ilock_flags);
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void xrep_orphanage_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);
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void xrep_orphanage_rele(struct xfs_scrub *sc);
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/* Information about a request to add a file to the orphanage. */
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struct xrep_adoption {
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struct xfs_scrub *sc;
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/* Name used for the adoption. */
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struct xfs_name *xname;
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/* Parent pointer context tracking */
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struct xfs_parent_args ppargs;
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/* Block reservations for orphanage and child (if directory). */
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unsigned int orphanage_blkres;
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unsigned int child_blkres;
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/*
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* Does the caller want us to bump the child link count? This is not
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* needed when reattaching files that have become disconnected but have
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* nlink > 1. It is necessary when changing the directory tree
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* structure.
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*/
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bool bump_child_nlink:1;
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};
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bool xrep_orphanage_can_adopt(struct xfs_scrub *sc);
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int xrep_adoption_trans_alloc(struct xfs_scrub *sc,
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struct xrep_adoption *adopt);
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int xrep_adoption_compute_name(struct xrep_adoption *adopt,
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struct xfs_name *xname);
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int xrep_adoption_move(struct xrep_adoption *adopt);
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int xrep_adoption_trans_roll(struct xrep_adoption *adopt);
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#else
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struct xrep_adoption { /* empty */ };
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# define xrep_orphanage_rele(sc) ((void)0)
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#endif /* CONFIG_XFS_ONLINE_REPAIR */
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#endif /* __XFS_SCRUB_ORPHANAGE_H__ */
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