1 files changed, 59 insertions, 18 deletions

diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 61f80a6410c7..9f8c312dfd3c 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -60,6 +60,32 @@ xchk_superblock_xref(
 }
 
 /*
+ * Calculate the ondisk superblock size in bytes given the feature set of the
+ * mounted filesystem (aka the primary sb).  This is subtlely different from
+ * the logic in xfs_repair, which computes the size of a secondary sb given the
+ * featureset listed in the secondary sb.
+ */
+STATIC size_t
+xchk_superblock_ondisk_size(
+	struct xfs_mount	*mp)
+{
+	if (xfs_has_metadir(mp))
+		return offsetofend(struct xfs_dsb, sb_pad);
+	if (xfs_has_metauuid(mp))
+		return offsetofend(struct xfs_dsb, sb_meta_uuid);
+	if (xfs_has_crc(mp))
+		return offsetofend(struct xfs_dsb, sb_lsn);
+	if (xfs_sb_version_hasmorebits(&mp->m_sb))
+		return offsetofend(struct xfs_dsb, sb_bad_features2);
+	if (xfs_has_logv2(mp))
+		return offsetofend(struct xfs_dsb, sb_logsunit);
+	if (xfs_has_sector(mp))
+		return offsetofend(struct xfs_dsb, sb_logsectsize);
+	/* only support dirv2 or more recent */
+	return offsetofend(struct xfs_dsb, sb_dirblklog);
+}
+
+/*
  * Scrub the filesystem superblock.
  *
  * Note: We do /not/ attempt to check AG 0's superblock.  Mount is
@@ -75,6 +101,7 @@ xchk_superblock(
 	struct xfs_buf		*bp;
 	struct xfs_dsb		*sb;
 	struct xfs_perag	*pag;
+	size_t			sblen;
 	xfs_agnumber_t		agno;
 	uint32_t		v2_ok;
 	__be32			features_mask;
@@ -145,8 +172,11 @@ xchk_superblock(
 		xchk_block_set_preen(sc, bp);
 
 	if (xfs_has_metadir(sc->mp)) {
-		if (sb->sb_metadirino != cpu_to_be64(mp->m_sb.sb_metadirino))
-			xchk_block_set_preen(sc, bp);
+		if (sb->sb_rbmino != cpu_to_be64(0))
+			xchk_block_set_corrupt(sc, bp);
+
+		if (sb->sb_rsumino != cpu_to_be64(0))
+			xchk_block_set_corrupt(sc, bp);
 	} else {
 		if (sb->sb_rbmino != cpu_to_be64(mp->m_sb.sb_rbmino))
 			xchk_block_set_preen(sc, bp);
@@ -229,7 +259,13 @@ xchk_superblock(
 	 * sb_icount, sb_ifree, sb_fdblocks, sb_frexents
 	 */
 
-	if (!xfs_has_metadir(mp)) {
+	if (xfs_has_metadir(mp)) {
+		if (sb->sb_uquotino != cpu_to_be64(0))
+			xchk_block_set_corrupt(sc, bp);
+
+		if (sb->sb_gquotino != cpu_to_be64(0))
+			xchk_block_set_preen(sc, bp);
+	} else {
 		if (sb->sb_uquotino != cpu_to_be64(mp->m_sb.sb_uquotino))
 			xchk_block_set_preen(sc, bp);
 
@@ -281,15 +317,8 @@ xchk_superblock(
 		if (!!(sb->sb_features2 & cpu_to_be32(~v2_ok)))
 			xchk_block_set_corrupt(sc, bp);
 
-		if (xfs_has_metadir(mp)) {
-			if (sb->sb_rgblklog != mp->m_sb.sb_rgblklog)
-				xchk_block_set_corrupt(sc, bp);
-			if (memchr_inv(sb->sb_pad, 0, sizeof(sb->sb_pad)))
-				xchk_block_set_preen(sc, bp);
-		} else {
-			if (sb->sb_features2 != sb->sb_bad_features2)
-				xchk_block_set_preen(sc, bp);
-		}
+		if (sb->sb_features2 != sb->sb_bad_features2)
+			xchk_block_set_preen(sc, bp);
 	}
 
 	/* Check sb_features2 flags that are set at mkfs time. */
@@ -351,7 +380,10 @@ xchk_superblock(
 		if (sb->sb_spino_align != cpu_to_be32(mp->m_sb.sb_spino_align))
 			xchk_block_set_corrupt(sc, bp);
 
-		if (!xfs_has_metadir(mp)) {
+		if (xfs_has_metadir(mp)) {
+			if (sb->sb_pquotino != cpu_to_be64(0))
+				xchk_block_set_corrupt(sc, bp);
+		} else {
 			if (sb->sb_pquotino != cpu_to_be64(mp->m_sb.sb_pquotino))
 				xchk_block_set_preen(sc, bp);
 		}
@@ -366,16 +398,25 @@ xchk_superblock(
 	}
 
 	if (xfs_has_metadir(mp)) {
+		if (sb->sb_metadirino != cpu_to_be64(mp->m_sb.sb_metadirino))
+			xchk_block_set_preen(sc, bp);
+
 		if (sb->sb_rgcount != cpu_to_be32(mp->m_sb.sb_rgcount))
 			xchk_block_set_corrupt(sc, bp);
 
 		if (sb->sb_rgextents != cpu_to_be32(mp->m_sb.sb_rgextents))
 			xchk_block_set_corrupt(sc, bp);
+
+		if (sb->sb_rgblklog != mp->m_sb.sb_rgblklog)
+			xchk_block_set_corrupt(sc, bp);
+
+		if (memchr_inv(sb->sb_pad, 0, sizeof(sb->sb_pad)))
+			xchk_block_set_corrupt(sc, bp);
 	}
 
 	/* Everything else must be zero. */
-	if (memchr_inv(sb + 1, 0,
-			BBTOB(bp->b_length) - sizeof(struct xfs_dsb)))
+	sblen = xchk_superblock_ondisk_size(mp);
+	if (memchr_inv((char *)sb + sblen, 0, BBTOB(bp->b_length) - sblen))
 		xchk_block_set_corrupt(sc, bp);
 
 	xchk_superblock_xref(sc, bp);
@@ -458,7 +499,7 @@ xchk_agf_xref_btreeblks(
 {
 	struct xfs_agf		*agf = sc->sa.agf_bp->b_addr;
 	struct xfs_mount	*mp = sc->mp;
-	xfs_agblock_t		blocks;
+	xfs_filblks_t		blocks;
 	xfs_agblock_t		btreeblks;
 	int			error;
 
@@ -507,7 +548,7 @@ xchk_agf_xref_refcblks(
 	struct xfs_scrub	*sc)
 {
 	struct xfs_agf		*agf = sc->sa.agf_bp->b_addr;
-	xfs_agblock_t		blocks;
+	xfs_filblks_t		blocks;
 	int			error;
 
 	if (!sc->sa.refc_cur)
@@ -840,7 +881,7 @@ xchk_agi_xref_fiblocks(
 	struct xfs_scrub	*sc)
 {
 	struct xfs_agi		*agi = sc->sa.agi_bp->b_addr;
-	xfs_agblock_t		blocks;
+	xfs_filblks_t		blocks;
 	int			error = 0;
 
 	if (!xfs_has_inobtcounts(sc->mp))