4 #include <linux/types.h>
5 #include <linux/magic.h>
8 * Disc Record at disc address 0xc00
10 struct adfs_discrecord {
27 __le32 disc_size_high;
33 __le32 format_version;
35 __u8 unused52[60 - 52];
38 #define ADFS_DISCRECORD (0xc00)
39 #define ADFS_DR_OFFSET (0x1c0)
40 #define ADFS_DR_SIZE 60
41 #define ADFS_DR_SIZE_BITS (ADFS_DR_SIZE << 3)
44 #include <linux/adfs_fs_i.h>
45 #include <linux/adfs_fs_sb.h>
47 * Calculate the boot block checksum on an ADFS drive. Note that this will
48 * appear to be correct if the sector contains all zeros, so also check that
49 * the disk size is non-zero!!!
51 static inline int adfs_checkbblk(unsigned char *ptr)
53 unsigned int result = 0;
54 unsigned char *p = ptr + 511;
57 result = (result & 0xff) + (result >> 8);
58 result = result + *--p;
61 return (result & 0xff) != ptr[511];
64 static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
69 static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
71 return container_of(inode, struct adfs_inode_info, vfs_inode);