mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
dbfbf3bdf6
Use the rmapbt to find inode chunks, query the chunks to compute hole and free masks, and with that information rebuild the inobt and finobt. Refer to the case study in Documentation/filesystems/xfs-online-fsck-design.rst for more details. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
206 lines
6.4 KiB
C
206 lines
6.4 KiB
C
// 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_SCRUB_H__
|
|
#define __XFS_SCRUB_SCRUB_H__
|
|
|
|
struct xfs_scrub;
|
|
|
|
/*
|
|
* Standard flags for allocating memory within scrub. NOFS context is
|
|
* configured by the process allocation scope. Scrub and repair must be able
|
|
* to back out gracefully if there isn't enough memory. Force-cast to avoid
|
|
* complaints from static checkers.
|
|
*/
|
|
#define XCHK_GFP_FLAGS ((__force gfp_t)(GFP_KERNEL | __GFP_NOWARN | \
|
|
__GFP_RETRY_MAYFAIL))
|
|
|
|
/* Type info and names for the scrub types. */
|
|
enum xchk_type {
|
|
ST_NONE = 1, /* disabled */
|
|
ST_PERAG, /* per-AG metadata */
|
|
ST_FS, /* per-FS metadata */
|
|
ST_INODE, /* per-inode metadata */
|
|
};
|
|
|
|
struct xchk_meta_ops {
|
|
/* Acquire whatever resources are needed for the operation. */
|
|
int (*setup)(struct xfs_scrub *sc);
|
|
|
|
/* Examine metadata for errors. */
|
|
int (*scrub)(struct xfs_scrub *);
|
|
|
|
/* Repair or optimize the metadata. */
|
|
int (*repair)(struct xfs_scrub *);
|
|
|
|
/*
|
|
* Re-scrub the metadata we repaired, in case there's extra work that
|
|
* we need to do to check our repair work. If this is NULL, we'll use
|
|
* the ->scrub function pointer, assuming that the regular scrub is
|
|
* sufficient.
|
|
*/
|
|
int (*repair_eval)(struct xfs_scrub *sc);
|
|
|
|
/* Decide if we even have this piece of metadata. */
|
|
bool (*has)(struct xfs_mount *);
|
|
|
|
/* type describing required/allowed inputs */
|
|
enum xchk_type type;
|
|
};
|
|
|
|
/* Buffer pointers and btree cursors for an entire AG. */
|
|
struct xchk_ag {
|
|
struct xfs_perag *pag;
|
|
|
|
/* AG btree roots */
|
|
struct xfs_buf *agf_bp;
|
|
struct xfs_buf *agi_bp;
|
|
|
|
/* AG btrees */
|
|
struct xfs_btree_cur *bno_cur;
|
|
struct xfs_btree_cur *cnt_cur;
|
|
struct xfs_btree_cur *ino_cur;
|
|
struct xfs_btree_cur *fino_cur;
|
|
struct xfs_btree_cur *rmap_cur;
|
|
struct xfs_btree_cur *refc_cur;
|
|
};
|
|
|
|
struct xfs_scrub {
|
|
/* General scrub state. */
|
|
struct xfs_mount *mp;
|
|
struct xfs_scrub_metadata *sm;
|
|
const struct xchk_meta_ops *ops;
|
|
struct xfs_trans *tp;
|
|
|
|
/* File that scrub was called with. */
|
|
struct file *file;
|
|
|
|
/*
|
|
* File that is undergoing the scrub operation. This can differ from
|
|
* the file that scrub was called with if we're checking file-based fs
|
|
* metadata (e.g. rt bitmaps) or if we're doing a scrub-by-handle for
|
|
* something that can't be opened directly (e.g. symlinks).
|
|
*/
|
|
struct xfs_inode *ip;
|
|
|
|
/* Kernel memory buffer used by scrubbers; freed at teardown. */
|
|
void *buf;
|
|
|
|
/*
|
|
* Clean up resources owned by whatever is in the buffer. Cleanup can
|
|
* be deferred with this hook as a means for scrub functions to pass
|
|
* data to repair functions. This function must not free the buffer
|
|
* itself.
|
|
*/
|
|
void (*buf_cleanup)(void *buf);
|
|
|
|
/* xfile used by the scrubbers; freed at teardown. */
|
|
struct xfile *xfile;
|
|
|
|
/* Lock flags for @ip. */
|
|
uint ilock_flags;
|
|
|
|
/* See the XCHK/XREP state flags below. */
|
|
unsigned int flags;
|
|
|
|
/*
|
|
* The XFS_SICK_* flags that correspond to the metadata being scrubbed
|
|
* or repaired. We will use this mask to update the in-core fs health
|
|
* status with whatever we find.
|
|
*/
|
|
unsigned int sick_mask;
|
|
|
|
/* State tracking for single-AG operations. */
|
|
struct xchk_ag sa;
|
|
};
|
|
|
|
/* XCHK state flags grow up from zero, XREP state flags grown down from 2^31 */
|
|
#define XCHK_TRY_HARDER (1U << 0) /* can't get resources, try again */
|
|
#define XCHK_HAVE_FREEZE_PROT (1U << 1) /* do we have freeze protection? */
|
|
#define XCHK_FSGATES_DRAIN (1U << 2) /* defer ops draining enabled */
|
|
#define XCHK_NEED_DRAIN (1U << 3) /* scrub needs to drain defer ops */
|
|
#define XREP_RESET_PERAG_RESV (1U << 30) /* must reset AG space reservation */
|
|
#define XREP_ALREADY_FIXED (1U << 31) /* checking our repair work */
|
|
|
|
/*
|
|
* The XCHK_FSGATES* flags reflect functionality in the main filesystem that
|
|
* are only enabled for this particular online fsck. When not in use, the
|
|
* features are gated off via dynamic code patching, which is why the state
|
|
* must be enabled during scrub setup and can only be torn down afterwards.
|
|
*/
|
|
#define XCHK_FSGATES_ALL (XCHK_FSGATES_DRAIN)
|
|
|
|
/* Metadata scrubbers */
|
|
int xchk_tester(struct xfs_scrub *sc);
|
|
int xchk_superblock(struct xfs_scrub *sc);
|
|
int xchk_agf(struct xfs_scrub *sc);
|
|
int xchk_agfl(struct xfs_scrub *sc);
|
|
int xchk_agi(struct xfs_scrub *sc);
|
|
int xchk_allocbt(struct xfs_scrub *sc);
|
|
int xchk_iallocbt(struct xfs_scrub *sc);
|
|
int xchk_rmapbt(struct xfs_scrub *sc);
|
|
int xchk_refcountbt(struct xfs_scrub *sc);
|
|
int xchk_inode(struct xfs_scrub *sc);
|
|
int xchk_bmap_data(struct xfs_scrub *sc);
|
|
int xchk_bmap_attr(struct xfs_scrub *sc);
|
|
int xchk_bmap_cow(struct xfs_scrub *sc);
|
|
int xchk_directory(struct xfs_scrub *sc);
|
|
int xchk_xattr(struct xfs_scrub *sc);
|
|
int xchk_symlink(struct xfs_scrub *sc);
|
|
int xchk_parent(struct xfs_scrub *sc);
|
|
#ifdef CONFIG_XFS_RT
|
|
int xchk_rtbitmap(struct xfs_scrub *sc);
|
|
int xchk_rtsummary(struct xfs_scrub *sc);
|
|
#else
|
|
static inline int
|
|
xchk_rtbitmap(struct xfs_scrub *sc)
|
|
{
|
|
return -ENOENT;
|
|
}
|
|
static inline int
|
|
xchk_rtsummary(struct xfs_scrub *sc)
|
|
{
|
|
return -ENOENT;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_XFS_QUOTA
|
|
int xchk_quota(struct xfs_scrub *sc);
|
|
#else
|
|
static inline int
|
|
xchk_quota(struct xfs_scrub *sc)
|
|
{
|
|
return -ENOENT;
|
|
}
|
|
#endif
|
|
int xchk_fscounters(struct xfs_scrub *sc);
|
|
|
|
/* cross-referencing helpers */
|
|
void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_not_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_inode_chunk(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_only_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len, const struct xfs_owner_info *oinfo);
|
|
void xchk_xref_is_not_owned_by(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len, const struct xfs_owner_info *oinfo);
|
|
void xchk_xref_has_no_owner(struct xfs_scrub *sc, xfs_agblock_t agbno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_not_shared(struct xfs_scrub *sc, xfs_agblock_t bno,
|
|
xfs_extlen_t len);
|
|
void xchk_xref_is_not_cow_staging(struct xfs_scrub *sc, xfs_agblock_t bno,
|
|
xfs_extlen_t len);
|
|
#ifdef CONFIG_XFS_RT
|
|
void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
|
|
xfs_extlen_t len);
|
|
#else
|
|
# define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
|
|
#endif
|
|
|
|
#endif /* __XFS_SCRUB_SCRUB_H__ */
|