1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2017-2023 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <djwong@kernel.org>
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 *);
39 * Re-scrub the metadata we repaired, in case there's extra work that
40 * we need to do to check our repair work. If this is NULL, we'll use
41 * the ->scrub function pointer, assuming that the regular scrub is
44 int (*repair_eval)(struct xfs_scrub *sc);
46 /* Decide if we even have this piece of metadata. */
47 bool (*has)(struct xfs_mount *);
49 /* type describing required/allowed inputs */
53 /* Buffer pointers and btree cursors for an entire AG. */
55 struct xfs_perag *pag;
58 struct xfs_buf *agf_bp;
59 struct xfs_buf *agi_bp;
62 struct xfs_btree_cur *bno_cur;
63 struct xfs_btree_cur *cnt_cur;
64 struct xfs_btree_cur *ino_cur;
65 struct xfs_btree_cur *fino_cur;
66 struct xfs_btree_cur *rmap_cur;
67 struct xfs_btree_cur *refc_cur;
71 /* General scrub state. */
73 struct xfs_scrub_metadata *sm;
74 const struct xchk_meta_ops *ops;
77 /* File that scrub was called with. */
81 * File that is undergoing the scrub operation. This can differ from
82 * the file that scrub was called with if we're checking file-based fs
83 * metadata (e.g. rt bitmaps) or if we're doing a scrub-by-handle for
84 * something that can't be opened directly (e.g. symlinks).
88 /* Kernel memory buffer used by scrubbers; freed at teardown. */
92 * Clean up resources owned by whatever is in the buffer. Cleanup can
93 * be deferred with this hook as a means for scrub functions to pass
94 * data to repair functions. This function must not free the buffer
97 void (*buf_cleanup)(void *buf);
99 /* xfile used by the scrubbers; freed at teardown. */
102 /* buffer target for in-memory btrees; also freed at teardown. */
103 struct xfs_buftarg *xmbtp;
105 /* Lock flags for @ip. */
108 /* A temporary file on this filesystem, for staging new metadata. */
109 struct xfs_inode *tempip;
110 uint temp_ilock_flags;
112 /* See the XCHK/XREP state flags below. */
116 * The XFS_SICK_* flags that correspond to the metadata being scrubbed
117 * or repaired. We will use this mask to update the in-core fs health
118 * status with whatever we find.
120 unsigned int sick_mask;
122 /* State tracking for single-AG operations. */
126 /* XCHK state flags grow up from zero, XREP state flags grown down from 2^31 */
127 #define XCHK_TRY_HARDER (1U << 0) /* can't get resources, try again */
128 #define XCHK_HAVE_FREEZE_PROT (1U << 1) /* do we have freeze protection? */
129 #define XCHK_FSGATES_DRAIN (1U << 2) /* defer ops draining enabled */
130 #define XCHK_NEED_DRAIN (1U << 3) /* scrub needs to drain defer ops */
131 #define XCHK_FSGATES_QUOTA (1U << 4) /* quota live update enabled */
132 #define XCHK_FSGATES_DIRENTS (1U << 5) /* directory live update enabled */
133 #define XCHK_FSGATES_RMAP (1U << 6) /* rmapbt live update enabled */
134 #define XREP_FSGATES_EXCHANGE_RANGE (1U << 29) /* uses file content exchange */
135 #define XREP_RESET_PERAG_RESV (1U << 30) /* must reset AG space reservation */
136 #define XREP_ALREADY_FIXED (1U << 31) /* checking our repair work */
139 * The XCHK_FSGATES* flags reflect functionality in the main filesystem that
140 * are only enabled for this particular online fsck. When not in use, the
141 * features are gated off via dynamic code patching, which is why the state
142 * must be enabled during scrub setup and can only be torn down afterwards.
144 #define XCHK_FSGATES_ALL (XCHK_FSGATES_DRAIN | \
145 XCHK_FSGATES_QUOTA | \
146 XCHK_FSGATES_DIRENTS | \
150 * The sole XREP_FSGATES* flag reflects a log intent item that is protected
151 * by a log-incompat feature flag. No code patching in use here.
153 #define XREP_FSGATES_ALL (XREP_FSGATES_EXCHANGE_RANGE)
155 /* Metadata scrubbers */
156 int xchk_tester(struct xfs_scrub *sc);
157 int xchk_superblock(struct xfs_scrub *sc);
158 int xchk_agf(struct xfs_scrub *sc);
159 int xchk_agfl(struct xfs_scrub *sc);
160 int xchk_agi(struct xfs_scrub *sc);
161 int xchk_allocbt(struct xfs_scrub *sc);
162 int xchk_iallocbt(struct xfs_scrub *sc);
163 int xchk_rmapbt(struct xfs_scrub *sc);
164 int xchk_refcountbt(struct xfs_scrub *sc);
165 int xchk_inode(struct xfs_scrub *sc);
166 int xchk_bmap_data(struct xfs_scrub *sc);
167 int xchk_bmap_attr(struct xfs_scrub *sc);
168 int xchk_bmap_cow(struct xfs_scrub *sc);
169 int xchk_directory(struct xfs_scrub *sc);
170 int xchk_xattr(struct xfs_scrub *sc);
171 int xchk_symlink(struct xfs_scrub *sc);
172 int xchk_parent(struct xfs_scrub *sc);
174 int xchk_rtbitmap(struct xfs_scrub *sc);
175 int xchk_rtsummary(struct xfs_scrub *sc);
178 xchk_rtbitmap(struct xfs_scrub *sc)
183 xchk_rtsummary(struct xfs_scrub *sc)
188 #ifdef CONFIG_XFS_QUOTA
189 int xchk_quota(struct xfs_scrub *sc);
190 int xchk_quotacheck(struct xfs_scrub *sc);
193 xchk_quota(struct xfs_scrub *sc)
198 xchk_quotacheck(struct xfs_scrub *sc)
203 int xchk_fscounters(struct xfs_scrub *sc);
204 int xchk_nlinks(struct xfs_scrub *sc);
206 /* cross-referencing helpers */
207 void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno,
209 void xchk_xref_is_not_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
211 void xchk_xref_is_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
213 void xchk_xref_is_only_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
214 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
215 void xchk_xref_is_not_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
216 xfs_extlen_t len, const struct xfs_owner_info *oinfo);
217 void xchk_xref_has_no_owner(struct xfs_scrub *sc, xfs_agblock_t agbno,
219 void xchk_xref_is_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
221 void xchk_xref_is_not_shared(struct xfs_scrub *sc, xfs_agblock_t bno,
223 void xchk_xref_is_not_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
226 void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
229 # define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
232 #endif /* __XFS_SCRUB_SCRUB_H__ */