From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Plumb in the pieces necessary to check the refcount btree. If rmap is
available, check the reference count by performing an interval query
against the rmapbt.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/Makefile | 1
fs/xfs/libxfs/xfs_fs.h | 3 +
fs/xfs/scrub/common.h | 2 +
fs/xfs/scrub/refcount.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++
fs/xfs/scrub/scrub.c | 5 ++
fs/xfs/scrub/scrub.h | 1
6 files changed, 110 insertions(+), 1 deletion(-)
create mode 100644 fs/xfs/scrub/refcount.c
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 5a64f8d..a7c5752 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -151,6 +151,7 @@ xfs-y += $(addprefix scrub/, \
btree.o \
common.o \
ialloc.o \
+ refcount.o \
rmap.o \
scrub.o \
)
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index fb1d997..b3f992c 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -493,9 +493,10 @@ struct xfs_scrub_metadata {
#define XFS_SCRUB_TYPE_INOBT 7 /* inode btree */
#define XFS_SCRUB_TYPE_FINOBT 8 /* free inode btree */
#define XFS_SCRUB_TYPE_RMAPBT 9 /* reverse mapping btree */
+#define XFS_SCRUB_TYPE_REFCNTBT 10 /* reference count btree */
/* Number of scrub subcommands. */
-#define XFS_SCRUB_TYPE_NR 10
+#define XFS_SCRUB_TYPE_NR 11
/* i: Repair this metadata. */
#define XFS_SCRUB_IFLAG_REPAIR (1 << 0)
diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h
index 7922775..610e956 100644
--- a/fs/xfs/scrub/common.h
+++ b/fs/xfs/scrub/common.h
@@ -85,6 +85,8 @@ int xfs_scrub_setup_ag_iallocbt(struct xfs_scrub_context *sc,
struct xfs_inode *ip);
int xfs_scrub_setup_ag_rmapbt(struct xfs_scrub_context *sc,
struct xfs_inode *ip);
+int xfs_scrub_setup_ag_refcountbt(struct xfs_scrub_context *sc,
+ struct xfs_inode *ip);
void xfs_scrub_ag_free(struct xfs_scrub_context *sc, struct xfs_scrub_ag *sa);
diff --git a/fs/xfs/scrub/refcount.c b/fs/xfs/scrub/refcount.c
new file mode 100644
index 0000000..2aab775
--- /dev/null
+++ b/fs/xfs/scrub/refcount.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2017 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#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_alloc.h"
+#include "xfs_rmap.h"
+#include "scrub/xfs_scrub.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+#include "scrub/btree.h"
+#include "scrub/trace.h"
+
+/*
+ * Set us up to scrub reference count btrees.
+ */
+int
+xfs_scrub_setup_ag_refcountbt(
+ struct xfs_scrub_context *sc,
+ struct xfs_inode *ip)
+{
+ return xfs_scrub_setup_ag_btree(sc, ip, false);
+}
+
+/* Reference count btree scrubber. */
+
+/* Scrub a refcountbt record. */
+STATIC int
+xfs_scrub_refcountbt_helper(
+ struct xfs_scrub_btree *bs,
+ union xfs_btree_rec *rec)
+{
+ struct xfs_mount *mp = bs->cur->bc_mp;
+ xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
+ xfs_agblock_t bno;
+ xfs_extlen_t len;
+ xfs_nlink_t refcount;
+ bool has_cowflag;
+ int error = 0;
+
+ bno = be32_to_cpu(rec->refc.rc_startblock);
+ len = be32_to_cpu(rec->refc.rc_blockcount);
+ refcount = be32_to_cpu(rec->refc.rc_refcount);
+
+ /* Only CoW records can have refcount == 1. */
+ has_cowflag = (bno & XFS_REFC_COW_START);
+ if ((refcount == 1 && !has_cowflag) || (refcount != 1 && has_cowflag))
+ xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
+
+ /* Check the extent. */
+ bno &= ~XFS_REFC_COW_START;
+ if (bno + len <= bno ||
+ !xfs_verify_agbno_ptr(mp, agno, bno) ||
+ !xfs_verify_agbno_ptr(mp, agno, bno + len - 1))
+ xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
+
+ if (refcount == 0)
+ xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
+
+ return error;
+}
+
+/* Scrub the refcount btree for some AG. */
+int
+xfs_scrub_refcountbt(
+ struct xfs_scrub_context *sc)
+{
+ struct xfs_owner_info oinfo;
+
+ xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_REFC);
+ return xfs_scrub_btree(sc, sc->sa.refc_cur, xfs_scrub_refcountbt_helper,
+ &oinfo, NULL);
+}
diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c
index 9239cb3..10c9078 100644
--- a/fs/xfs/scrub/scrub.c
+++ b/fs/xfs/scrub/scrub.c
@@ -186,6 +186,11 @@ static const struct xfs_scrub_meta_ops meta_scrub_ops[] = {
.scrub = xfs_scrub_rmapbt,
.has = xfs_sb_version_hasrmapbt,
},
+ { /* refcountbt */
+ .setup = xfs_scrub_setup_ag_refcountbt,
+ .scrub = xfs_scrub_refcountbt,
+ .has = xfs_sb_version_hasreflink,
+ },
};
/* This isn't a stable feature, warn once per day. */
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h
index 0d1e78b..1c80bf5 100644
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -76,5 +76,6 @@ int xfs_scrub_cntbt(struct xfs_scrub_context *sc);
int xfs_scrub_inobt(struct xfs_scrub_context *sc);
int xfs_scrub_finobt(struct xfs_scrub_context *sc);
int xfs_scrub_rmapbt(struct xfs_scrub_context *sc);
+int xfs_scrub_refcountbt(struct xfs_scrub_context *sc);
#endif /* __XFS_SCRUB_SCRUB_H__ */
--
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