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-rw-r--r--fs/xfs/scrub/fscounters_repair.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/fs/xfs/scrub/fscounters_repair.c b/fs/xfs/scrub/fscounters_repair.c
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+++ b/fs/xfs/scrub/fscounters_repair.c
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2018-2024 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_defer.h"
+#include "xfs_btree.h"
+#include "xfs_bit.h"
+#include "xfs_log_format.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_inode.h"
+#include "xfs_alloc.h"
+#include "xfs_ialloc.h"
+#include "xfs_rmap.h"
+#include "xfs_health.h"
+#include "scrub/xfs_scrub.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+#include "scrub/trace.h"
+#include "scrub/repair.h"
+#include "scrub/fscounters.h"
+
+/*
+ * FS Summary Counters
+ * ===================
+ *
+ * We correct errors in the filesystem summary counters by setting them to the
+ * values computed during the obligatory scrub phase. However, we must be
+ * careful not to allow any other thread to change the counters while we're
+ * computing and setting new values. To achieve this, we freeze the
+ * filesystem for the whole operation if the REPAIR flag is set. The checking
+ * function is stricter when we've frozen the fs.
+ */
+
+/*
+ * Reset the superblock counters. Caller is responsible for freezing the
+ * filesystem during the calculation and reset phases.
+ */
+int
+xrep_fscounters(
+ struct xfs_scrub *sc)
+{
+ struct xfs_mount *mp = sc->mp;
+ struct xchk_fscounters *fsc = sc->buf;
+
+ /*
+ * Reinitialize the in-core counters from what we computed. We froze
+ * the filesystem, so there shouldn't be anyone else trying to modify
+ * these counters.
+ */
+ if (!fsc->frozen) {
+ ASSERT(fsc->frozen);
+ return -EFSCORRUPTED;
+ }
+
+ trace_xrep_reset_counters(mp, fsc);
+
+ percpu_counter_set(&mp->m_icount, fsc->icount);
+ percpu_counter_set(&mp->m_ifree, fsc->ifree);
+ percpu_counter_set(&mp->m_fdblocks, fsc->fdblocks);
+ percpu_counter_set(&mp->m_frextents, fsc->frextents);
+ mp->m_sb.sb_frextents = fsc->frextents;
+
+ return 0;
+}