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2651923d8d
If a symbolic link target looks bad, try to sift through the rubble to find as much of the target buffer that we can, and stage a new target (short or remote format as needed) in a temporary file and use the atomic extent swapping mechanism to commit the results. In the worst case, we replace the target with an overly long filename that cannot possibly resolve. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
246 lines
6.9 KiB
C
246 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2018-2023 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_REPAIR_H__
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#define __XFS_SCRUB_REPAIR_H__
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#include "xfs_quota_defs.h"
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struct xchk_stats_run;
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static inline int xrep_notsupported(struct xfs_scrub *sc)
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{
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return -EOPNOTSUPP;
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}
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#ifdef CONFIG_XFS_ONLINE_REPAIR
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/*
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* This is the maximum number of deferred extent freeing item extents (EFIs)
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* that we'll attach to a transaction without rolling the transaction to avoid
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* overrunning a tr_itruncate reservation.
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*/
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#define XREP_MAX_ITRUNCATE_EFIS (128)
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/* Repair helpers */
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int xrep_attempt(struct xfs_scrub *sc, struct xchk_stats_run *run);
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bool xrep_will_attempt(struct xfs_scrub *sc);
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void xrep_failure(struct xfs_mount *mp);
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int xrep_roll_ag_trans(struct xfs_scrub *sc);
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int xrep_roll_trans(struct xfs_scrub *sc);
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int xrep_defer_finish(struct xfs_scrub *sc);
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bool xrep_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
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enum xfs_ag_resv_type type);
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xfs_extlen_t xrep_calc_ag_resblks(struct xfs_scrub *sc);
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static inline int
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xrep_trans_commit(
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struct xfs_scrub *sc)
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{
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int error = xfs_trans_commit(sc->tp);
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sc->tp = NULL;
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return error;
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}
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struct xbitmap;
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struct xagb_bitmap;
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struct xfsb_bitmap;
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int xrep_fix_freelist(struct xfs_scrub *sc, int alloc_flags);
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struct xrep_find_ag_btree {
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/* in: rmap owner of the btree we're looking for */
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uint64_t rmap_owner;
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/* in: buffer ops */
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const struct xfs_buf_ops *buf_ops;
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/* in: maximum btree height */
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unsigned int maxlevels;
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/* out: the highest btree block found and the tree height */
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xfs_agblock_t root;
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unsigned int height;
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};
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int xrep_find_ag_btree_roots(struct xfs_scrub *sc, struct xfs_buf *agf_bp,
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struct xrep_find_ag_btree *btree_info, struct xfs_buf *agfl_bp);
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#ifdef CONFIG_XFS_QUOTA
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void xrep_update_qflags(struct xfs_scrub *sc, unsigned int clear_flags,
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unsigned int set_flags);
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void xrep_force_quotacheck(struct xfs_scrub *sc, xfs_dqtype_t type);
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int xrep_ino_dqattach(struct xfs_scrub *sc);
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#else
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# define xrep_force_quotacheck(sc, type) ((void)0)
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# define xrep_ino_dqattach(sc) (0)
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#endif /* CONFIG_XFS_QUOTA */
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int xrep_setup_xfbtree(struct xfs_scrub *sc, const char *descr);
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int xrep_ino_ensure_extent_count(struct xfs_scrub *sc, int whichfork,
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xfs_extnum_t nextents);
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int xrep_reset_perag_resv(struct xfs_scrub *sc);
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int xrep_bmap(struct xfs_scrub *sc, int whichfork, bool allow_unwritten);
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int xrep_metadata_inode_forks(struct xfs_scrub *sc);
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int xrep_setup_ag_rmapbt(struct xfs_scrub *sc);
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int xrep_setup_ag_refcountbt(struct xfs_scrub *sc);
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int xrep_setup_xattr(struct xfs_scrub *sc);
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int xrep_setup_directory(struct xfs_scrub *sc);
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int xrep_setup_parent(struct xfs_scrub *sc);
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int xrep_setup_nlinks(struct xfs_scrub *sc);
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int xrep_setup_symlink(struct xfs_scrub *sc, unsigned int *resblks);
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/* Repair setup functions */
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int xrep_setup_ag_allocbt(struct xfs_scrub *sc);
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struct xfs_imap;
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int xrep_setup_inode(struct xfs_scrub *sc, const struct xfs_imap *imap);
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void xrep_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
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int xrep_ag_init(struct xfs_scrub *sc, struct xfs_perag *pag,
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struct xchk_ag *sa);
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/* Metadata revalidators */
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int xrep_revalidate_allocbt(struct xfs_scrub *sc);
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int xrep_revalidate_iallocbt(struct xfs_scrub *sc);
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/* Metadata repairers */
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int xrep_probe(struct xfs_scrub *sc);
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int xrep_superblock(struct xfs_scrub *sc);
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int xrep_agf(struct xfs_scrub *sc);
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int xrep_agfl(struct xfs_scrub *sc);
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int xrep_agi(struct xfs_scrub *sc);
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int xrep_allocbt(struct xfs_scrub *sc);
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int xrep_iallocbt(struct xfs_scrub *sc);
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int xrep_rmapbt(struct xfs_scrub *sc);
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int xrep_refcountbt(struct xfs_scrub *sc);
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int xrep_inode(struct xfs_scrub *sc);
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int xrep_bmap_data(struct xfs_scrub *sc);
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int xrep_bmap_attr(struct xfs_scrub *sc);
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int xrep_bmap_cow(struct xfs_scrub *sc);
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int xrep_nlinks(struct xfs_scrub *sc);
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int xrep_fscounters(struct xfs_scrub *sc);
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int xrep_xattr(struct xfs_scrub *sc);
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int xrep_directory(struct xfs_scrub *sc);
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int xrep_parent(struct xfs_scrub *sc);
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int xrep_symlink(struct xfs_scrub *sc);
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#ifdef CONFIG_XFS_RT
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int xrep_rtbitmap(struct xfs_scrub *sc);
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int xrep_rtsummary(struct xfs_scrub *sc);
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#else
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# define xrep_rtbitmap xrep_notsupported
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# define xrep_rtsummary xrep_notsupported
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#endif /* CONFIG_XFS_RT */
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#ifdef CONFIG_XFS_QUOTA
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int xrep_quota(struct xfs_scrub *sc);
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int xrep_quotacheck(struct xfs_scrub *sc);
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#else
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# define xrep_quota xrep_notsupported
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# define xrep_quotacheck xrep_notsupported
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#endif /* CONFIG_XFS_QUOTA */
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int xrep_reinit_pagf(struct xfs_scrub *sc);
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int xrep_reinit_pagi(struct xfs_scrub *sc);
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int xrep_trans_alloc_hook_dummy(struct xfs_mount *mp, void **cookiep,
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struct xfs_trans **tpp);
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void xrep_trans_cancel_hook_dummy(void **cookiep, struct xfs_trans *tp);
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bool xrep_buf_verify_struct(struct xfs_buf *bp, const struct xfs_buf_ops *ops);
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#else
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#define xrep_ino_dqattach(sc) (0)
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#define xrep_will_attempt(sc) (false)
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static inline int
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xrep_attempt(
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struct xfs_scrub *sc,
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struct xchk_stats_run *run)
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{
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return -EOPNOTSUPP;
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}
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static inline void xrep_failure(struct xfs_mount *mp) {}
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static inline xfs_extlen_t
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xrep_calc_ag_resblks(
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struct xfs_scrub *sc)
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{
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return 0;
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}
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static inline int
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xrep_reset_perag_resv(
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struct xfs_scrub *sc)
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{
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if (!(sc->flags & XREP_RESET_PERAG_RESV))
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return 0;
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ASSERT(0);
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return -EOPNOTSUPP;
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}
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/* repair setup functions for no-repair */
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static inline int
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xrep_setup_nothing(
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struct xfs_scrub *sc)
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{
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return 0;
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}
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#define xrep_setup_ag_allocbt xrep_setup_nothing
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#define xrep_setup_ag_rmapbt xrep_setup_nothing
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#define xrep_setup_ag_refcountbt xrep_setup_nothing
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#define xrep_setup_xattr xrep_setup_nothing
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#define xrep_setup_directory xrep_setup_nothing
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#define xrep_setup_parent xrep_setup_nothing
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#define xrep_setup_nlinks xrep_setup_nothing
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#define xrep_setup_inode(sc, imap) ((void)0)
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static inline int xrep_setup_symlink(struct xfs_scrub *sc, unsigned int *x)
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{
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return 0;
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}
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#define xrep_revalidate_allocbt (NULL)
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#define xrep_revalidate_iallocbt (NULL)
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#define xrep_probe xrep_notsupported
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#define xrep_superblock xrep_notsupported
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#define xrep_agf xrep_notsupported
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#define xrep_agfl xrep_notsupported
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#define xrep_agi xrep_notsupported
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#define xrep_allocbt xrep_notsupported
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#define xrep_iallocbt xrep_notsupported
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#define xrep_rmapbt xrep_notsupported
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#define xrep_refcountbt xrep_notsupported
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#define xrep_inode xrep_notsupported
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#define xrep_bmap_data xrep_notsupported
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#define xrep_bmap_attr xrep_notsupported
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#define xrep_bmap_cow xrep_notsupported
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#define xrep_rtbitmap xrep_notsupported
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#define xrep_quota xrep_notsupported
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#define xrep_quotacheck xrep_notsupported
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#define xrep_nlinks xrep_notsupported
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#define xrep_fscounters xrep_notsupported
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#define xrep_rtsummary xrep_notsupported
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#define xrep_xattr xrep_notsupported
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#define xrep_directory xrep_notsupported
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#define xrep_parent xrep_notsupported
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#define xrep_symlink xrep_notsupported
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#endif /* CONFIG_XFS_ONLINE_REPAIR */
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#endif /* __XFS_SCRUB_REPAIR_H__ */
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