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