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Diffstat (limited to 'fs/xfs/libxfs/xfs_sb.c')
-rw-r--r--fs/xfs/libxfs/xfs_sb.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index a3f4504..21009db 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -402,6 +402,14 @@ __xfs_sb_from_disk(
to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
to->sb_lsn = be64_to_cpu(from->sb_lsn);
+ /*
+ * sb_meta_uuid is only on disk if it differs from sb_uuid and the
+ * feature flag is set; if not set we keep it only in memory.
+ */
+ if (xfs_sb_version_hasmetauuid(to))
+ uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
+ else
+ uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
/* Convert on-disk flags to in-memory flags? */
if (convert_xquota)
xfs_sb_quota_from_disk(to);
@@ -543,6 +551,8 @@ xfs_sb_to_disk(
cpu_to_be32(from->sb_features_log_incompat);
to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
to->sb_lsn = cpu_to_be64(from->sb_lsn);
+ if (xfs_sb_version_hasmetauuid(from))
+ uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
}
}
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