diff options
Diffstat (limited to '')
| -rw-r--r-- | fs/xfs/xfs_health.c | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/fs/xfs/xfs_health.c b/fs/xfs/xfs_health.c new file mode 100644 index 000000000..72a075bb2 --- /dev/null +++ b/fs/xfs/xfs_health.c @@ -0,0 +1,395 @@ +// 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; + 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; + 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; + 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)); + trace_xfs_inode_mark_sick(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)); + 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 }, + { 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 }, + { 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; + } +} |