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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2019 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#ifndef __XFS_HEALTH_H__
#define __XFS_HEALTH_H__
/*
* In-Core Filesystem Health Assessments
* =====================================
*
* We'd like to be able to summarize the current health status of the
* filesystem so that the administrator knows when it's necessary to schedule
* some downtime for repairs. Until then, we would also like to avoid abrupt
* shutdowns due to corrupt metadata.
*
* The online scrub feature evaluates the health of all filesystem metadata.
* When scrub detects corruption in a piece of metadata it will set the
* corresponding sickness flag, and repair will clear it if successful. If
* problems remain at unmount time, we can also request manual intervention by
* logging a notice to run xfs_repair.
*
* Each health tracking group uses a pair of fields for reporting. The
* "checked" field tell us if a given piece of metadata has ever been examined,
* and the "sick" field tells us if that piece was found to need repairs.
* Therefore we can conclude that for a given sick flag value:
*
* - checked && sick => metadata needs repair
* - checked && !sick => metadata is ok
* - !checked => has not been examined since mount
*/
struct xfs_mount;
struct xfs_perag;
struct xfs_inode;
struct xfs_fsop_geom;
/* Observable health issues for metadata spanning the entire filesystem. */
#define XFS_SICK_FS_COUNTERS (1 << 0) /* summary counters */
#define XFS_SICK_FS_UQUOTA (1 << 1) /* user quota */
#define XFS_SICK_FS_GQUOTA (1 << 2) /* group quota */
#define XFS_SICK_FS_PQUOTA (1 << 3) /* project quota */
/* Observable health issues for realtime volume metadata. */
#define XFS_SICK_RT_BITMAP (1 << 0) /* realtime bitmap */
#define XFS_SICK_RT_SUMMARY (1 << 1) /* realtime summary */
/* Observable health issues for AG metadata. */
#define XFS_SICK_AG_SB (1 << 0) /* superblock */
#define XFS_SICK_AG_AGF (1 << 1) /* AGF header */
#define XFS_SICK_AG_AGFL (1 << 2) /* AGFL header */
#define XFS_SICK_AG_AGI (1 << 3) /* AGI header */
#define XFS_SICK_AG_BNOBT (1 << 4) /* free space by block */
#define XFS_SICK_AG_CNTBT (1 << 5) /* free space by length */
#define XFS_SICK_AG_INOBT (1 << 6) /* inode index */
#define XFS_SICK_AG_FINOBT (1 << 7) /* free inode index */
#define XFS_SICK_AG_RMAPBT (1 << 8) /* reverse mappings */
#define XFS_SICK_AG_REFCNTBT (1 << 9) /* reference counts */
/* Observable health issues for inode metadata. */
#define XFS_SICK_INO_CORE (1 << 0) /* inode core */
#define XFS_SICK_INO_BMBTD (1 << 1) /* data fork */
#define XFS_SICK_INO_BMBTA (1 << 2) /* attr fork */
#define XFS_SICK_INO_BMBTC (1 << 3) /* cow fork */
#define XFS_SICK_INO_DIR (1 << 4) /* directory */
#define XFS_SICK_INO_XATTR (1 << 5) /* extended attributes */
#define XFS_SICK_INO_SYMLINK (1 << 6) /* symbolic link remote target */
#define XFS_SICK_INO_PARENT (1 << 7) /* parent pointers */
/* Primary evidence of health problems in a given group. */
#define XFS_SICK_FS_PRIMARY (XFS_SICK_FS_COUNTERS | \
XFS_SICK_FS_UQUOTA | \
XFS_SICK_FS_GQUOTA | \
XFS_SICK_FS_PQUOTA)
#define XFS_SICK_RT_PRIMARY (XFS_SICK_RT_BITMAP | \
XFS_SICK_RT_SUMMARY)
#define XFS_SICK_AG_PRIMARY (XFS_SICK_AG_SB | \
XFS_SICK_AG_AGF | \
XFS_SICK_AG_AGFL | \
XFS_SICK_AG_AGI | \
XFS_SICK_AG_BNOBT | \
XFS_SICK_AG_CNTBT | \
XFS_SICK_AG_INOBT | \
XFS_SICK_AG_FINOBT | \
XFS_SICK_AG_RMAPBT | \
XFS_SICK_AG_REFCNTBT)
#define XFS_SICK_INO_PRIMARY (XFS_SICK_INO_CORE | \
XFS_SICK_INO_BMBTD | \
XFS_SICK_INO_BMBTA | \
XFS_SICK_INO_BMBTC | \
XFS_SICK_INO_DIR | \
XFS_SICK_INO_XATTR | \
XFS_SICK_INO_SYMLINK | \
XFS_SICK_INO_PARENT)
/* These functions must be provided by the xfs implementation. */
void xfs_fs_mark_sick(struct xfs_mount *mp, unsigned int mask);
void xfs_fs_mark_healthy(struct xfs_mount *mp, unsigned int mask);
void xfs_fs_measure_sickness(struct xfs_mount *mp, unsigned int *sick,
unsigned int *checked);
void xfs_rt_mark_sick(struct xfs_mount *mp, unsigned int mask);
void xfs_rt_mark_healthy(struct xfs_mount *mp, unsigned int mask);
void xfs_rt_measure_sickness(struct xfs_mount *mp, unsigned int *sick,
unsigned int *checked);
void xfs_ag_mark_sick(struct xfs_perag *pag, unsigned int mask);
void xfs_ag_mark_healthy(struct xfs_perag *pag, unsigned int mask);
void xfs_ag_measure_sickness(struct xfs_perag *pag, unsigned int *sick,
unsigned int *checked);
void xfs_inode_mark_sick(struct xfs_inode *ip, unsigned int mask);
void xfs_inode_mark_healthy(struct xfs_inode *ip, unsigned int mask);
void xfs_inode_measure_sickness(struct xfs_inode *ip, unsigned int *sick,
unsigned int *checked);
void xfs_health_unmount(struct xfs_mount *mp);
/* Now some helpers. */
static inline bool
xfs_fs_has_sickness(struct xfs_mount *mp, unsigned int mask)
{
unsigned int sick, checked;
xfs_fs_measure_sickness(mp, &sick, &checked);
return sick & mask;
}
static inline bool
xfs_rt_has_sickness(struct xfs_mount *mp, unsigned int mask)
{
unsigned int sick, checked;
xfs_rt_measure_sickness(mp, &sick, &checked);
return sick & mask;
}
static inline bool
xfs_ag_has_sickness(struct xfs_perag *pag, unsigned int mask)
{
unsigned int sick, checked;
xfs_ag_measure_sickness(pag, &sick, &checked);
return sick & mask;
}
static inline bool
xfs_inode_has_sickness(struct xfs_inode *ip, unsigned int mask)
{
unsigned int sick, checked;
xfs_inode_measure_sickness(ip, &sick, &checked);
return sick & mask;
}
static inline bool
xfs_fs_is_healthy(struct xfs_mount *mp)
{
return !xfs_fs_has_sickness(mp, -1U);
}
static inline bool
xfs_rt_is_healthy(struct xfs_mount *mp)
{
return !xfs_rt_has_sickness(mp, -1U);
}
static inline bool
xfs_ag_is_healthy(struct xfs_perag *pag)
{
return !xfs_ag_has_sickness(pag, -1U);
}
static inline bool
xfs_inode_is_healthy(struct xfs_inode *ip)
{
return !xfs_inode_has_sickness(ip, -1U);
}
void xfs_fsop_geom_health(struct xfs_mount *mp, struct xfs_fsop_geom *geo);
void xfs_ag_geom_health(struct xfs_perag *pag, struct xfs_ag_geometry *ageo);
void xfs_bulkstat_health(struct xfs_inode *ip, struct xfs_bulkstat *bs);
#endif /* __XFS_HEALTH_H__ */
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