summaryrefslogtreecommitdiff
path: root/fs/xfs/scrub/common.h
blob: cabdc0e16838c770ac48a1e518b4159ef996636b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2017-2023 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <djwong@kernel.org>
 */
#ifndef __XFS_SCRUB_COMMON_H__
#define __XFS_SCRUB_COMMON_H__

/*
 * We /could/ terminate a scrub/repair operation early.  If we're not
 * in a good place to continue (fatal signal, etc.) then bail out.
 * Note that we're careful not to make any judgements about *error.
 */
static inline bool
xchk_should_terminate(
	struct xfs_scrub	*sc,
	int			*error)
{
	/*
	 * If preemption is disabled, we need to yield to the scheduler every
	 * few seconds so that we don't run afoul of the soft lockup watchdog
	 * or RCU stall detector.
	 */
	cond_resched();

	if (fatal_signal_pending(current)) {
		if (*error == 0)
			*error = -EINTR;
		return true;
	}
	return false;
}

int xchk_trans_alloc(struct xfs_scrub *sc, uint resblks);
void xchk_trans_cancel(struct xfs_scrub *sc);

bool xchk_process_error(struct xfs_scrub *sc, xfs_agnumber_t agno,
		xfs_agblock_t bno, int *error);
bool xchk_fblock_process_error(struct xfs_scrub *sc, int whichfork,
		xfs_fileoff_t offset, int *error);

bool xchk_xref_process_error(struct xfs_scrub *sc,
		xfs_agnumber_t agno, xfs_agblock_t bno, int *error);
bool xchk_fblock_xref_process_error(struct xfs_scrub *sc,
		int whichfork, xfs_fileoff_t offset, int *error);

void xchk_block_set_preen(struct xfs_scrub *sc,
		struct xfs_buf *bp);
void xchk_ino_set_preen(struct xfs_scrub *sc, xfs_ino_t ino);

void xchk_set_corrupt(struct xfs_scrub *sc);
void xchk_block_set_corrupt(struct xfs_scrub *sc,
		struct xfs_buf *bp);
void xchk_ino_set_corrupt(struct xfs_scrub *sc, xfs_ino_t ino);
void xchk_fblock_set_corrupt(struct xfs_scrub *sc, int whichfork,
		xfs_fileoff_t offset);

void xchk_block_xref_set_corrupt(struct xfs_scrub *sc,
		struct xfs_buf *bp);
void xchk_ino_xref_set_corrupt(struct xfs_scrub *sc,
		xfs_ino_t ino);
void xchk_fblock_xref_set_corrupt(struct xfs_scrub *sc,
		int whichfork, xfs_fileoff_t offset);

void xchk_ino_set_warning(struct xfs_scrub *sc, xfs_ino_t ino);
void xchk_fblock_set_warning(struct xfs_scrub *sc, int whichfork,
		xfs_fileoff_t offset);

void xchk_set_incomplete(struct xfs_scrub *sc);
int xchk_checkpoint_log(struct xfs_mount *mp);

/* Are we set up for a cross-referencing check? */
bool xchk_should_check_xref(struct xfs_scrub *sc, int *error,
			   struct xfs_btree_cur **curpp);

/* Setup functions */
int xchk_setup_agheader(struct xfs_scrub *sc);
int xchk_setup_fs(struct xfs_scrub *sc);
int xchk_setup_ag_allocbt(struct xfs_scrub *sc);
int xchk_setup_ag_iallocbt(struct xfs_scrub *sc);
int xchk_setup_ag_rmapbt(struct xfs_scrub *sc);
int xchk_setup_ag_refcountbt(struct xfs_scrub *sc);
int xchk_setup_inode(struct xfs_scrub *sc);
int xchk_setup_inode_bmap(struct xfs_scrub *sc);
int xchk_setup_inode_bmap_data(struct xfs_scrub *sc);
int xchk_setup_directory(struct xfs_scrub *sc);
int xchk_setup_xattr(struct xfs_scrub *sc);
int xchk_setup_symlink(struct xfs_scrub *sc);
int xchk_setup_parent(struct xfs_scrub *sc);
#ifdef CONFIG_XFS_RT
int xchk_setup_rtbitmap(struct xfs_scrub *sc);
int xchk_setup_rtsummary(struct xfs_scrub *sc);
#else
static inline int
xchk_setup_rtbitmap(struct xfs_scrub *sc)
{
	return -ENOENT;
}
static inline int
xchk_setup_rtsummary(struct xfs_scrub *sc)
{
	return -ENOENT;
}
#endif
#ifdef CONFIG_XFS_QUOTA
int xchk_setup_quota(struct xfs_scrub *sc);
#else
static inline int
xchk_setup_quota(struct xfs_scrub *sc)
{
	return -ENOENT;
}
#endif
int xchk_setup_fscounters(struct xfs_scrub *sc);

void xchk_ag_free(struct xfs_scrub *sc, struct xchk_ag *sa);
int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno,
		struct xchk_ag *sa);

/*
 * Grab all AG resources, treating the inability to grab the perag structure as
 * a fs corruption.  This is intended for callers checking an ondisk reference
 * to a given AG, which means that the AG must still exist.
 */
static inline int
xchk_ag_init_existing(
	struct xfs_scrub	*sc,
	xfs_agnumber_t		agno,
	struct xchk_ag		*sa)
{
	int			error = xchk_ag_init(sc, agno, sa);

	return error == -ENOENT ? -EFSCORRUPTED : error;
}

int xchk_ag_read_headers(struct xfs_scrub *sc, xfs_agnumber_t agno,
		struct xchk_ag *sa);
void xchk_ag_btcur_free(struct xchk_ag *sa);
void xchk_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
int xchk_count_rmap_ownedby_ag(struct xfs_scrub *sc, struct xfs_btree_cur *cur,
		const struct xfs_owner_info *oinfo, xfs_filblks_t *blocks);

int xchk_setup_ag_btree(struct xfs_scrub *sc, bool force_log);
int xchk_iget_for_scrubbing(struct xfs_scrub *sc);
int xchk_setup_inode_contents(struct xfs_scrub *sc, unsigned int resblks);
int xchk_install_live_inode(struct xfs_scrub *sc, struct xfs_inode *ip);

void xchk_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
bool xchk_ilock_nowait(struct xfs_scrub *sc, unsigned int ilock_flags);
void xchk_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);

void xchk_buffer_recheck(struct xfs_scrub *sc, struct xfs_buf *bp);

int xchk_iget(struct xfs_scrub *sc, xfs_ino_t inum, struct xfs_inode **ipp);
int xchk_iget_agi(struct xfs_scrub *sc, xfs_ino_t inum,
		struct xfs_buf **agi_bpp, struct xfs_inode **ipp);
void xchk_irele(struct xfs_scrub *sc, struct xfs_inode *ip);
int xchk_install_handle_inode(struct xfs_scrub *sc, struct xfs_inode *ip);

/*
 * Don't bother cross-referencing if we already found corruption or cross
 * referencing discrepancies.
 */
static inline bool xchk_skip_xref(struct xfs_scrub_metadata *sm)
{
	return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
			       XFS_SCRUB_OFLAG_XCORRUPT);
}

#ifdef CONFIG_XFS_ONLINE_REPAIR
/* Decide if a repair is required. */
static inline bool xchk_needs_repair(const struct xfs_scrub_metadata *sm)
{
	return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
			       XFS_SCRUB_OFLAG_XCORRUPT |
			       XFS_SCRUB_OFLAG_PREEN);
}
#else
# define xchk_needs_repair(sc)		(false)
#endif /* CONFIG_XFS_ONLINE_REPAIR */

int xchk_metadata_inode_forks(struct xfs_scrub *sc);

/*
 * Helper macros to allocate and format xfile description strings.
 * Callers must kfree the pointer returned.
 */
#define xchk_xfile_descr(sc, fmt, ...) \
	kasprintf(XCHK_GFP_FLAGS, "XFS (%s): " fmt, \
			(sc)->mp->m_super->s_id, ##__VA_ARGS__)

/*
 * Setting up a hook to wait for intents to drain is costly -- we have to take
 * the CPU hotplug lock and force an i-cache flush on all CPUs once to set it
 * up, and again to tear it down.  These costs add up quickly, so we only want
 * to enable the drain waiter if the drain actually detected a conflict with
 * running intent chains.
 */
static inline bool xchk_need_intent_drain(struct xfs_scrub *sc)
{
	return sc->flags & XCHK_NEED_DRAIN;
}

void xchk_fsgates_enable(struct xfs_scrub *sc, unsigned int scrub_fshooks);

int xchk_inode_is_allocated(struct xfs_scrub *sc, xfs_agino_t agino,
		bool *inuse);

#endif	/* __XFS_SCRUB_COMMON_H__ */