fs/ntfs3: Add more info into /proc/fs/ntfs3/<dev>/volinfo

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/super.c

@@ -453,15 +453,23 @@ static struct proc_dir_entry *proc_info_root;
  * ntfs3.1
  * cluster size
  * number of clusters
+ * total number of mft records
+ * number of used mft records ~= number of files + folders
+ * real state of ntfs "dirty"/"clean"
+ * current state of ntfs "dirty"/"clean"
 */
 static int ntfs3_volinfo(struct seq_file *m, void *o)
 {
 	struct super_block *sb = m->private;
 	struct ntfs_sb_info *sbi = sb->s_fs_info;
 
-	seq_printf(m, "ntfs%d.%d\n%u\n%zu\n", sbi->volume.major_ver,
-		   sbi->volume.minor_ver, sbi->cluster_size,
-		   sbi->used.bitmap.nbits);
+	seq_printf(m, "ntfs%d.%d\n%u\n%zu\n\%zu\n%zu\n%s\n%s\n",
+		   sbi->volume.major_ver, sbi->volume.minor_ver,
+		   sbi->cluster_size, sbi->used.bitmap.nbits,
+		   sbi->mft.bitmap.nbits,
+		   sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap),
+		   sbi->volume.real_dirty ? "dirty" : "clean",
+		   (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean");
 
 	return 0;
 }