Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/xfs/xfs_health.c b/fs/xfs/xfs_health.c
new file mode 100644
index 0000000..8e0cb05
--- /dev/null
+++ b/fs/xfs/xfs_health.c
@@ -0,0 +1,388 @@
+// 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_sb.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_trace.h"
+#include "xfs_health.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_FORCED_SHUTDOWN(mp))
+ return;
+
+ /* Measure AG corruption levels. */
+ for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
+ pag = xfs_perag_get(mp, agno);
+ xfs_ag_measure_sickness(pag, &sick, &checked);
+ if (sick) {
+ trace_xfs_ag_unfixed_corruption(mp, agno, sick);
+ warn = true;
+ }
+ xfs_perag_put(pag);
+ }
+
+ /* 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);
+}
+
+/* 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;
+ }
+}