fs/xfs/scrub/scrub.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Oracle.  All Rights Reserved.
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  */
   6 #ifndef __XFS_SCRUB_SCRUB_H__
   7 #define __XFS_SCRUB_SCRUB_H__
   8
   9 struct xfs_scrub;
  10
  11 /* Type info and names for the scrub types. */
  12 enum xchk_type {
  13         ST_NONE = 1,    /* disabled */
  14         ST_PERAG,       /* per-AG metadata */
  15         ST_FS,          /* per-FS metadata */
  16         ST_INODE,       /* per-inode metadata */
  17 };
  18
  19 struct xchk_meta_ops {
  20         /* Acquire whatever resources are needed for the operation. */
  21         int             (*setup)(struct xfs_scrub *,
  22                                  struct xfs_inode *);
  23
  24         /* Examine metadata for errors. */
  25         int             (*scrub)(struct xfs_scrub *);
  26
  27         /* Repair or optimize the metadata. */
  28         int             (*repair)(struct xfs_scrub *);
  29
  30         /* Decide if we even have this piece of metadata. */
  31         bool            (*has)(struct xfs_sb *);
  32
  33         /* type describing required/allowed inputs */
  34         enum xchk_type  type;
  35 };
  36
  37 /* Buffer pointers and btree cursors for an entire AG. */
  38 struct xchk_ag {
  39         xfs_agnumber_t          agno;
  40         struct xfs_perag        *pag;
  41
  42         /* AG btree roots */
  43         struct xfs_buf          *agf_bp;
  44         struct xfs_buf          *agfl_bp;
  45         struct xfs_buf          *agi_bp;
  46
  47         /* AG btrees */
  48         struct xfs_btree_cur    *bno_cur;
  49         struct xfs_btree_cur    *cnt_cur;
  50         struct xfs_btree_cur    *ino_cur;
  51         struct xfs_btree_cur    *fino_cur;
  52         struct xfs_btree_cur    *rmap_cur;
  53         struct xfs_btree_cur    *refc_cur;
  54 };
  55
  56 struct xfs_scrub {
  57         /* General scrub state. */
  58         struct xfs_mount                *mp;
  59         struct xfs_scrub_metadata       *sm;
  60         const struct xchk_meta_ops      *ops;
  61         struct xfs_trans                *tp;
  62         struct xfs_inode                *ip;
  63         void                            *buf;
  64         uint                            ilock_flags;
  65
  66         /* See the XCHK/XREP state flags below. */
  67         unsigned int                    flags;
  68
  69         /*
  70          * The XFS_SICK_* flags that correspond to the metadata being scrubbed
  71          * or repaired.  We will use this mask to update the in-core fs health
  72          * status with whatever we find.
  73          */
  74         unsigned int                    sick_mask;
  75
  76         /* State tracking for single-AG operations. */
  77         struct xchk_ag                  sa;
  78 };
  79
  80 /* XCHK state flags grow up from zero, XREP state flags grown down from 2^31 */
  81 #define XCHK_TRY_HARDER         (1 << 0)  /* can't get resources, try again */
  82 #define XCHK_HAS_QUOTAOFFLOCK   (1 << 1)  /* we hold the quotaoff lock */
  83 #define XCHK_REAPING_DISABLED   (1 << 2)  /* background block reaping paused */
  84 #define XREP_ALREADY_FIXED      (1 << 31) /* checking our repair work */
  85
  86 /* Metadata scrubbers */
  87 int xchk_tester(struct xfs_scrub *sc);
  88 int xchk_superblock(struct xfs_scrub *sc);
  89 int xchk_agf(struct xfs_scrub *sc);
  90 int xchk_agfl(struct xfs_scrub *sc);
  91 int xchk_agi(struct xfs_scrub *sc);
  92 int xchk_bnobt(struct xfs_scrub *sc);
  93 int xchk_cntbt(struct xfs_scrub *sc);
  94 int xchk_inobt(struct xfs_scrub *sc);
  95 int xchk_finobt(struct xfs_scrub *sc);
  96 int xchk_rmapbt(struct xfs_scrub *sc);
  97 int xchk_refcountbt(struct xfs_scrub *sc);
  98 int xchk_inode(struct xfs_scrub *sc);
  99 int xchk_bmap_data(struct xfs_scrub *sc);
 100 int xchk_bmap_attr(struct xfs_scrub *sc);
 101 int xchk_bmap_cow(struct xfs_scrub *sc);
 102 int xchk_directory(struct xfs_scrub *sc);
 103 int xchk_xattr(struct xfs_scrub *sc);
 104 int xchk_symlink(struct xfs_scrub *sc);
 105 int xchk_parent(struct xfs_scrub *sc);
 106 #ifdef CONFIG_XFS_RT
 107 int xchk_rtbitmap(struct xfs_scrub *sc);
 108 int xchk_rtsummary(struct xfs_scrub *sc);
 109 #else
 110 static inline int
 111 xchk_rtbitmap(struct xfs_scrub *sc)
 112 {
 113         return -ENOENT;
 114 }
 115 static inline int
 116 xchk_rtsummary(struct xfs_scrub *sc)
 117 {
 118         return -ENOENT;
 119 }
 120 #endif
 121 #ifdef CONFIG_XFS_QUOTA
 122 int xchk_quota(struct xfs_scrub *sc);
 123 #else
 124 static inline int
 125 xchk_quota(struct xfs_scrub *sc)
 126 {
 127         return -ENOENT;
 128 }
 129 #endif
 130 int xchk_fscounters(struct xfs_scrub *sc);
 131
 132 /* cross-referencing helpers */
 133 void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno,
 134                 xfs_extlen_t len);
 135 void xchk_xref_is_not_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
 136                 xfs_extlen_t len);
 137 void xchk_xref_is_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
 138                 xfs_extlen_t len);
 139 void xchk_xref_is_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
 140                 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
 141 void xchk_xref_is_not_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
 142                 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
 143 void xchk_xref_has_no_owner(struct xfs_scrub *sc, xfs_agblock_t agbno,
 144                 xfs_extlen_t len);
 145 void xchk_xref_is_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
 146                 xfs_extlen_t len);
 147 void xchk_xref_is_not_shared(struct xfs_scrub *sc, xfs_agblock_t bno,
 148                 xfs_extlen_t len);
 149 #ifdef CONFIG_XFS_RT
 150 void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
 151                 xfs_extlen_t len);
 152 #else
 153 # define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
 154 #endif
 155
 156 struct xchk_fscounters {
 157         uint64_t                icount;
 158         uint64_t                ifree;
 159         uint64_t                fdblocks;
 160         unsigned long long      icount_min;
 161         unsigned long long      icount_max;
 162 };
 163
 164 #endif  /* __XFS_SCRUB_SCRUB_H__ */