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0b8686f198
linux/fs/xfs/xfs_health.c
Darrick J. Wong 0b8686f198 xfs: separate the marking of sick and checked metadata 
Split the setting of the sick and checked masks into separate functions
as part of preparing to add the ability for regular runtime fs code
(i.e. not scrub) to mark metadata structures sick when corruptions are
found.  Improve the documentation of libxfs' requirements for helper
behavior.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2024-02-22 12:31:01 -08:00

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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>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_trace.h"
#include "xfs_health.h"
#include "xfs_ag.h"
/*
* Warn about metadata corruption that we detected but haven't fixed, and
* make sure we're not sitting on anything that would get in the way of
* recovery.
*/
void
xfs_health_unmount(
struct xfs_mount *mp)
{
struct xfs_perag *pag;
xfs_agnumber_t agno;
unsigned int sick = 0;
unsigned int checked = 0;
bool warn = false;
if (xfs_is_shutdown(mp))
return;
/* Measure AG corruption levels. */
for_each_perag(mp, agno, pag) {
xfs_ag_measure_sickness(pag, &sick, &checked);
if (sick) {
trace_xfs_ag_unfixed_corruption(mp, agno, sick);
warn = true;
}
}
/* Measure realtime volume corruption levels. */
xfs_rt_measure_sickness(mp, &sick, &checked);
if (sick) {
trace_xfs_rt_unfixed_corruption(mp, sick);
warn = true;
}
/*
* Measure fs corruption and keep the sample around for the warning.
* See the note below for why we exempt FS_COUNTERS.
*/
xfs_fs_measure_sickness(mp, &sick, &checked);
if (sick & ~XFS_SICK_FS_COUNTERS) {
trace_xfs_fs_unfixed_corruption(mp, sick);
warn = true;
}
if (warn) {
xfs_warn(mp,
"Uncorrected metadata errors detected; please run xfs_repair.");
/*
* We discovered uncorrected metadata problems at some point
* during this filesystem mount and have advised the
* administrator to run repair once the unmount completes.
*
* However, we must be careful -- when FSCOUNTERS are flagged
* unhealthy, the unmount procedure omits writing the clean
* unmount record to the log so that the next mount will run
* recovery and recompute the summary counters. In other
* words, we leave a dirty log to get the counters fixed.
*
* Unfortunately, xfs_repair cannot recover dirty logs, so if
* there were filesystem problems, FSCOUNTERS was flagged, and
* the administrator takes our advice to run xfs_repair,
* they'll have to zap the log before repairing structures.
* We don't really want to encourage this, so we mark the
* FSCOUNTERS healthy so that a subsequent repair run won't see
* a dirty log.
*/
if (sick & XFS_SICK_FS_COUNTERS)
xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS);
}
}
/* Mark unhealthy per-fs metadata. */
void
xfs_fs_mark_sick(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_FS_PRIMARY));
trace_xfs_fs_mark_sick(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_fs_sick |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Mark per-fs metadata as having been checked and found unhealthy by fsck. */
void
xfs_fs_mark_corrupt(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_FS_PRIMARY));
trace_xfs_fs_mark_corrupt(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_fs_sick |= mask;
mp->m_fs_checked |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Mark a per-fs metadata healed. */
void
xfs_fs_mark_healthy(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_FS_PRIMARY));
trace_xfs_fs_mark_healthy(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_fs_sick &= ~mask;
mp->m_fs_checked |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Sample which per-fs metadata are unhealthy. */
void
xfs_fs_measure_sickness(
struct xfs_mount *mp,
unsigned int *sick,
unsigned int *checked)
{
spin_lock(&mp->m_sb_lock);
*sick = mp->m_fs_sick;
*checked = mp->m_fs_checked;
spin_unlock(&mp->m_sb_lock);
}
/* Mark unhealthy realtime metadata. */
void
xfs_rt_mark_sick(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_RT_PRIMARY));
trace_xfs_rt_mark_sick(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_rt_sick |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Mark realtime metadata as having been checked and found unhealthy by fsck. */
void
xfs_rt_mark_corrupt(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_RT_PRIMARY));
trace_xfs_rt_mark_corrupt(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_rt_sick |= mask;
mp->m_rt_checked |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Mark a realtime metadata healed. */
void
xfs_rt_mark_healthy(
struct xfs_mount *mp,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_RT_PRIMARY));
trace_xfs_rt_mark_healthy(mp, mask);
spin_lock(&mp->m_sb_lock);
mp->m_rt_sick &= ~mask;
mp->m_rt_checked |= mask;
spin_unlock(&mp->m_sb_lock);
}
/* Sample which realtime metadata are unhealthy. */
void
xfs_rt_measure_sickness(
struct xfs_mount *mp,
unsigned int *sick,
unsigned int *checked)
{
spin_lock(&mp->m_sb_lock);
*sick = mp->m_rt_sick;
*checked = mp->m_rt_checked;
spin_unlock(&mp->m_sb_lock);
}
/* Mark unhealthy per-ag metadata. */
void
xfs_ag_mark_sick(
struct xfs_perag *pag,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_AG_PRIMARY));
trace_xfs_ag_mark_sick(pag->pag_mount, pag->pag_agno, mask);
spin_lock(&pag->pag_state_lock);
pag->pag_sick |= mask;
spin_unlock(&pag->pag_state_lock);
}
/* Mark per-ag metadata as having been checked and found unhealthy by fsck. */
void
xfs_ag_mark_corrupt(
struct xfs_perag *pag,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_AG_PRIMARY));
trace_xfs_ag_mark_corrupt(pag->pag_mount, pag->pag_agno, mask);
spin_lock(&pag->pag_state_lock);
pag->pag_sick |= mask;
pag->pag_checked |= mask;
spin_unlock(&pag->pag_state_lock);
}
/* Mark per-ag metadata ok. */
void
xfs_ag_mark_healthy(
struct xfs_perag *pag,
unsigned int mask)
{
ASSERT(!(mask & ~XFS_SICK_AG_PRIMARY));
trace_xfs_ag_mark_healthy(pag->pag_mount, pag->pag_agno, mask);
spin_lock(&pag->pag_state_lock);
pag->pag_sick &= ~mask;
pag->pag_checked |= mask;
spin_unlock(&pag->pag_state_lock);
}
/* Sample which per-ag metadata are unhealthy. */
void
xfs_ag_measure_sickness(
struct xfs_perag *pag,
unsigned int *sick,
unsigned int *checked)
{
spin_lock(&pag->pag_state_lock);
*sick = pag->pag_sick;
*checked = pag->pag_checked;
spin_unlock(&pag->pag_state_lock);
}
/* Mark the unhealthy parts of an inode. */
void
xfs_inode_mark_sick(
struct xfs_inode *ip,
unsigned int mask)
{
ASSERT(!(mask & ~(XFS_SICK_INO_PRIMARY | XFS_SICK_INO_ZAPPED)));
trace_xfs_inode_mark_sick(ip, mask);
spin_lock(&ip->i_flags_lock);
ip->i_sick |= mask;
spin_unlock(&ip->i_flags_lock);
/*
* Keep this inode around so we don't lose the sickness report. Scrub
* grabs inodes with DONTCACHE assuming that most inode are ok, which
* is not the case here.
*/
spin_lock(&VFS_I(ip)->i_lock);
VFS_I(ip)->i_state &= ~I_DONTCACHE;
spin_unlock(&VFS_I(ip)->i_lock);
}
/* Mark inode metadata as having been checked and found unhealthy by fsck. */
void
xfs_inode_mark_corrupt(
struct xfs_inode *ip,
unsigned int mask)
{
ASSERT(!(mask & ~(XFS_SICK_INO_PRIMARY | XFS_SICK_INO_ZAPPED)));
trace_xfs_inode_mark_corrupt(ip, mask);
spin_lock(&ip->i_flags_lock);
ip->i_sick |= mask;
ip->i_checked |= mask;
spin_unlock(&ip->i_flags_lock);
/*
* Keep this inode around so we don't lose the sickness report. Scrub
* grabs inodes with DONTCACHE assuming that most inode are ok, which
* is not the case here.
*/
spin_lock(&VFS_I(ip)->i_lock);
VFS_I(ip)->i_state &= ~I_DONTCACHE;
spin_unlock(&VFS_I(ip)->i_lock);
}
/* Mark parts of an inode healed. */
void
xfs_inode_mark_healthy(
struct xfs_inode *ip,
unsigned int mask)
{
ASSERT(!(mask & ~(XFS_SICK_INO_PRIMARY | XFS_SICK_INO_ZAPPED)));
trace_xfs_inode_mark_healthy(ip, mask);
spin_lock(&ip->i_flags_lock);
ip->i_sick &= ~mask;
ip->i_checked |= mask;
spin_unlock(&ip->i_flags_lock);
}
/* Sample which parts of an inode are unhealthy. */
void
xfs_inode_measure_sickness(
struct xfs_inode *ip,
unsigned int *sick,
unsigned int *checked)
{
spin_lock(&ip->i_flags_lock);
*sick = ip->i_sick;
*checked = ip->i_checked;
spin_unlock(&ip->i_flags_lock);
}
/* Mappings between internal sick masks and ioctl sick masks. */
struct ioctl_sick_map {
unsigned int sick_mask;
unsigned int ioctl_mask;
};
static const struct ioctl_sick_map fs_map[] = {
{ XFS_SICK_FS_COUNTERS, XFS_FSOP_GEOM_SICK_COUNTERS},
{ XFS_SICK_FS_UQUOTA, XFS_FSOP_GEOM_SICK_UQUOTA },
{ XFS_SICK_FS_GQUOTA, XFS_FSOP_GEOM_SICK_GQUOTA },
{ XFS_SICK_FS_PQUOTA, XFS_FSOP_GEOM_SICK_PQUOTA },
{ XFS_SICK_FS_QUOTACHECK, XFS_FSOP_GEOM_SICK_QUOTACHECK },
{ XFS_SICK_FS_NLINKS, XFS_FSOP_GEOM_SICK_NLINKS },
{ 0, 0 },
};
static const struct ioctl_sick_map rt_map[] = {
{ XFS_SICK_RT_BITMAP, XFS_FSOP_GEOM_SICK_RT_BITMAP },
{ XFS_SICK_RT_SUMMARY, XFS_FSOP_GEOM_SICK_RT_SUMMARY },
{ 0, 0 },
};
static inline void
xfgeo_health_tick(
struct xfs_fsop_geom *geo,
unsigned int sick,
unsigned int checked,
const struct ioctl_sick_map *m)
{
if (checked & m->sick_mask)
geo->checked |= m->ioctl_mask;
if (sick & m->sick_mask)
geo->sick |= m->ioctl_mask;
}
/* Fill out fs geometry health info. */
void
xfs_fsop_geom_health(
struct xfs_mount *mp,
struct xfs_fsop_geom *geo)
{
const struct ioctl_sick_map *m;
unsigned int sick;
unsigned int checked;
geo->sick = 0;
geo->checked = 0;
xfs_fs_measure_sickness(mp, &sick, &checked);
for (m = fs_map; m->sick_mask; m++)
xfgeo_health_tick(geo, sick, checked, m);
xfs_rt_measure_sickness(mp, &sick, &checked);
for (m = rt_map; m->sick_mask; m++)
xfgeo_health_tick(geo, sick, checked, m);
}
static const struct ioctl_sick_map ag_map[] = {
{ XFS_SICK_AG_SB, XFS_AG_GEOM_SICK_SB },
{ XFS_SICK_AG_AGF, XFS_AG_GEOM_SICK_AGF },
{ XFS_SICK_AG_AGFL, XFS_AG_GEOM_SICK_AGFL },
{ XFS_SICK_AG_AGI, XFS_AG_GEOM_SICK_AGI },
{ XFS_SICK_AG_BNOBT, XFS_AG_GEOM_SICK_BNOBT },
{ XFS_SICK_AG_CNTBT, XFS_AG_GEOM_SICK_CNTBT },
{ XFS_SICK_AG_INOBT, XFS_AG_GEOM_SICK_INOBT },
{ XFS_SICK_AG_FINOBT, XFS_AG_GEOM_SICK_FINOBT },
{ XFS_SICK_AG_RMAPBT, XFS_AG_GEOM_SICK_RMAPBT },
{ XFS_SICK_AG_REFCNTBT, XFS_AG_GEOM_SICK_REFCNTBT },
{ 0, 0 },
};
/* Fill out ag geometry health info. */
void
xfs_ag_geom_health(
struct xfs_perag *pag,
struct xfs_ag_geometry *ageo)
{
const struct ioctl_sick_map *m;
unsigned int sick;
unsigned int checked;
ageo->ag_sick = 0;
ageo->ag_checked = 0;
xfs_ag_measure_sickness(pag, &sick, &checked);
for (m = ag_map; m->sick_mask; m++) {
if (checked & m->sick_mask)
ageo->ag_checked |= m->ioctl_mask;
if (sick & m->sick_mask)
ageo->ag_sick |= m->ioctl_mask;
}
}
static const struct ioctl_sick_map ino_map[] = {
{ XFS_SICK_INO_CORE, XFS_BS_SICK_INODE },
{ XFS_SICK_INO_BMBTD, XFS_BS_SICK_BMBTD },
{ XFS_SICK_INO_BMBTA, XFS_BS_SICK_BMBTA },
{ XFS_SICK_INO_BMBTC, XFS_BS_SICK_BMBTC },
{ XFS_SICK_INO_DIR, XFS_BS_SICK_DIR },
{ XFS_SICK_INO_XATTR, XFS_BS_SICK_XATTR },
{ XFS_SICK_INO_SYMLINK, XFS_BS_SICK_SYMLINK },
{ XFS_SICK_INO_PARENT, XFS_BS_SICK_PARENT },
{ XFS_SICK_INO_BMBTD_ZAPPED, XFS_BS_SICK_BMBTD },
{ XFS_SICK_INO_BMBTA_ZAPPED, XFS_BS_SICK_BMBTA },
{ XFS_SICK_INO_DIR_ZAPPED, XFS_BS_SICK_DIR },
{ XFS_SICK_INO_SYMLINK_ZAPPED, XFS_BS_SICK_SYMLINK },
{ 0, 0 },
};
/* Fill out bulkstat health info. */
void
xfs_bulkstat_health(
struct xfs_inode *ip,
struct xfs_bulkstat *bs)
{
const struct ioctl_sick_map *m;
unsigned int sick;
unsigned int checked;
bs->bs_sick = 0;
bs->bs_checked = 0;
xfs_inode_measure_sickness(ip, &sick, &checked);
for (m = ino_map; m->sick_mask; m++) {
if (checked & m->sick_mask)
bs->bs_checked |= m->ioctl_mask;
if (sick & m->sick_mask)
bs->bs_sick |= m->ioctl_mask;
}
}
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