linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / include / linux / msdos_fs.h

diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h
index 9a3d272..e933e2a 100644 (file)
--- a/include/linux/msdos_fs.h
+++ b/include/linux/msdos_fs.h
@@ -282,6 +282,17 @@ static inline u8 fat_attr(struct inode *inode)
                MSDOS_I(inode)->i_attrs;
 }
 
+static inline unsigned char fat_checksum(const __u8 *name)
+{
+       unsigned char s = name[0];
+       s = (s<<7) + (s>>1) + name[1];  s = (s<<7) + (s>>1) + name[2];
+       s = (s<<7) + (s>>1) + name[3];  s = (s<<7) + (s>>1) + name[4];
+       s = (s<<7) + (s>>1) + name[5];  s = (s<<7) + (s>>1) + name[6];
+       s = (s<<7) + (s>>1) + name[7];  s = (s<<7) + (s>>1) + name[8];
+       s = (s<<7) + (s>>1) + name[9];  s = (s<<7) + (s>>1) + name[10];
+       return s;
+}
+
 static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus)
 {
        return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus
@@ -318,7 +329,8 @@ static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len)
 extern void fat_cache_inval_inode(struct inode *inode);
 extern int fat_get_cluster(struct inode *inode, int cluster,
                           int *fclus, int *dclus);
-extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys);
+extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
+                   unsigned long *mapped_blocks);
 
 /* fat/dir.c */
 extern struct file_operations fat_dir_operations;