NTFS: Load the mft mirror at mount time and compare the mft records

      stored in it to the ones in the mft (fs/ntfs/super.c).

Documentation/filesystems/ntfs.txt

@@ -71,6 +71,7 @@ Features
   compatibility, we implement access to files using their short file names if
   they exist. The driver will not create short file names however, and a rename
   will discard any existing short file name.
+- The new driver supports exporting of mounted NTFS volumes via NFS.
 
 
 Supported mount options

fs/ntfs/ChangeLog

@@ -37,6 +37,8 @@ ToDo:
 	  fs/ntfs/inode.h so they can be used elsewhere.
 	- Determine the mft mirror size as the number of mirrored mft records
 	  and store it in ntfs_volume->mftmirr_size (fs/ntfs/super.c).
+	- Load the mft mirror at mount time and compare the mft records stored
+	  in it to the ones in the mft (fs/ntfs/super.c).
 
 2.1.7 - Enable NFS exporting of mounted NTFS volumes.
 

fs/ntfs/volume.h

@@ -45,7 +45,7 @@ typedef struct {
 	LCN nr_blocks;			/* Number of NTFS_BLOCK_SIZE bytes
 					   sized blocks on the device. */
 	/* Configuration provided by user at mount time. */
-	unsigned long flags;		/* Miscellaneous flags, see above. */
+	unsigned long flags;		/* Miscellaneous flags, see below. */
 	uid_t uid;			/* uid that files will be mounted as. */
 	gid_t gid;			/* gid that files will be mounted as. */
 	mode_t fmask;			/* The mask for file permissions. */
@@ -83,15 +83,17 @@ typedef struct {
 	unsigned long nr_mft_records;	/* Number of mft records == number of
 					   bits in mft bitmap. */
 
+#ifdef NTFS_RW
 	struct inode *mftmirr_ino;	/* The VFS inode of $MFTMirr. */
 	int mftmirr_size;		/* Size of mft mirror in mft records. */
+#endif /* NTFS_RW */
 
 	struct inode *lcnbmp_ino;	/* The VFS inode of $Bitmap. */
 	struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the
 					    cluster bitmap ($Bitmap/$DATA). */
 
 	struct inode *vol_ino;		/* The VFS inode of $Volume. */
-	VOLUME_FLAGS vol_flags;		/* Volume flags (VOLUME_*). */
+	VOLUME_FLAGS vol_flags;		/* Volume flags. */
 	u8 major_ver;			/* Ntfs major version of volume. */
 	u8 minor_ver;			/* Ntfs minor version of volume. */