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-rw-r--r--fs/ntfs3/ntfs.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h
index 3ec2eaf31996..98b76d1b09e7 100644
--- a/fs/ntfs3/ntfs.h
+++ b/fs/ntfs3/ntfs.h
@@ -288,6 +288,15 @@ struct MFT_REC {
#define MFTRECORD_FIXUP_OFFSET_1 offsetof(struct MFT_REC, res)
#define MFTRECORD_FIXUP_OFFSET_3 offsetof(struct MFT_REC, fixups)
+/*
+ * define MFTRECORD_FIXUP_OFFSET as MFTRECORD_FIXUP_OFFSET_3 (0x30)
+ * to format new mft records with bigger header (as current ntfs.sys does)
+ *
+ * define MFTRECORD_FIXUP_OFFSET as MFTRECORD_FIXUP_OFFSET_1 (0x2A)
+ * to format new mft records with smaller header (as old ntfs.sys did)
+ * Both variants are valid.
+ */
+#define MFTRECORD_FIXUP_OFFSET MFTRECORD_FIXUP_OFFSET_1
static_assert(MFTRECORD_FIXUP_OFFSET_1 == 0x2A);
static_assert(MFTRECORD_FIXUP_OFFSET_3 == 0x30);