1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2017-2023 Oracle. All Rights Reserved.
6 #ifndef __XFS_SCRUB_SCRUB_H__
7 #define __XFS_SCRUB_SCRUB_H__
12 * Standard flags for allocating memory within scrub. NOFS context is
13 * configured by the process allocation scope. Scrub and repair must be able
14 * to back out gracefully if there isn't enough memory. Force-cast to avoid
15 * complaints from static checkers.
17 #define XCHK_GFP_FLAGS ((__force gfp_t)(GFP_KERNEL | __GFP_NOWARN | \
20 /* Type info and names for the scrub types. */
22 ST_NONE = 1, /* disabled */
23 ST_PERAG, /* per-AG metadata */
24 ST_FS, /* per-FS metadata */
25 ST_INODE, /* per-inode metadata */
28 struct xchk_meta_ops {
29 /* Acquire whatever resources are needed for the operation. */
30 int (*setup)(struct xfs_scrub *sc);
32 /* Examine metadata for errors. */
33 int (*scrub)(struct xfs_scrub *);
35 /* Repair or optimize the metadata. */
36 int (*repair)(struct xfs_scrub *);
38 /* Decide if we even have this piece of metadata. */
39 bool (*has)(struct xfs_mount *);
41 /* type describing required/allowed inputs */
45 /* Buffer pointers and btree cursors for an entire AG. */
47 struct xfs_perag *pag;
50 struct xfs_buf *agf_bp;
51 struct xfs_buf *agi_bp;
54 struct xfs_btree_cur *bno_cur;
55 struct xfs_btree_cur *cnt_cur;
56 struct xfs_btree_cur *ino_cur;
57 struct xfs_btree_cur *fino_cur;
58 struct xfs_btree_cur *rmap_cur;
59 struct xfs_btree_cur *refc_cur;
63 /* General scrub state. */
65 struct xfs_scrub_metadata *sm;
66 const struct xchk_meta_ops *ops;
69 /* File that scrub was called with. */
73 * File that is undergoing the scrub operation. This can differ from
74 * the file that scrub was called with if we're checking file-based fs
75 * metadata (e.g. rt bitmaps) or if we're doing a scrub-by-handle for
76 * something that can't be opened directly (e.g. symlinks).
80 /* Kernel memory buffer used by scrubbers; freed at teardown. */
84 * Clean up resources owned by whatever is in the buffer. Cleanup can
85 * be deferred with this hook as a means for scrub functions to pass
86 * data to repair functions. This function must not free the buffer
89 void (*buf_cleanup)(void *buf);
93 /* See the XCHK/XREP state flags below. */
97 * The XFS_SICK_* flags that correspond to the metadata being scrubbed
98 * or repaired. We will use this mask to update the in-core fs health
99 * status with whatever we find.
101 unsigned int sick_mask;
103 /* State tracking for single-AG operations. */
107 /* XCHK state flags grow up from zero, XREP state flags grown down from 2^31 */
108 #define XCHK_TRY_HARDER (1U << 0) /* can't get resources, try again */
109 #define XCHK_FSGATES_DRAIN (1U << 2) /* defer ops draining enabled */
110 #define XCHK_NEED_DRAIN (1U << 3) /* scrub needs to drain defer ops */
111 #define XREP_ALREADY_FIXED (1U << 31) /* checking our repair work */
114 * The XCHK_FSGATES* flags reflect functionality in the main filesystem that
115 * are only enabled for this particular online fsck. When not in use, the
116 * features are gated off via dynamic code patching, which is why the state
117 * must be enabled during scrub setup and can only be torn down afterwards.
119 #define XCHK_FSGATES_ALL (XCHK_FSGATES_DRAIN)
121 /* Metadata scrubbers */
122 int xchk_tester(struct xfs_scrub *sc);
123 int xchk_superblock(struct xfs_scrub *sc);
124 int xchk_agf(struct xfs_scrub *sc);
125 int xchk_agfl(struct xfs_scrub *sc);
126 int xchk_agi(struct xfs_scrub *sc);
127 int xchk_bnobt(struct xfs_scrub *sc);
128 int xchk_cntbt(struct xfs_scrub *sc);
129 int xchk_inobt(struct xfs_scrub *sc);
130 int xchk_finobt(struct xfs_scrub *sc);
131 int xchk_rmapbt(struct xfs_scrub *sc);
132 int xchk_refcountbt(struct xfs_scrub *sc);
133 int xchk_inode(struct xfs_scrub *sc);
134 int xchk_bmap_data(struct xfs_scrub *sc);
135 int xchk_bmap_attr(struct xfs_scrub *sc);
136 int xchk_bmap_cow(struct xfs_scrub *sc);
137 int xchk_directory(struct xfs_scrub *sc);
138 int xchk_xattr(struct xfs_scrub *sc);
139 int xchk_symlink(struct xfs_scrub *sc);
140 int xchk_parent(struct xfs_scrub *sc);
142 int xchk_rtbitmap(struct xfs_scrub *sc);
143 int xchk_rtsummary(struct xfs_scrub *sc);
146 xchk_rtbitmap(struct xfs_scrub *sc)
151 xchk_rtsummary(struct xfs_scrub *sc)
156 #ifdef CONFIG_XFS_QUOTA
157 int xchk_quota(struct xfs_scrub *sc);
160 xchk_quota(struct xfs_scrub *sc)
165 int xchk_fscounters(struct xfs_scrub *sc);
167 /* cross-referencing helpers */
168 void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno,
170 void xchk_xref_is_not_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
172 void xchk_xref_is_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
174 void xchk_xref_is_only_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
175 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
176 void xchk_xref_is_not_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
177 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
178 void xchk_xref_has_no_owner(struct xfs_scrub *sc, xfs_agblock_t agbno,
180 void xchk_xref_is_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
182 void xchk_xref_is_not_shared(struct xfs_scrub *sc, xfs_agblock_t bno,
184 void xchk_xref_is_not_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
187 void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
190 # define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
193 #endif /* __XFS_SCRUB_SCRUB_H__ */