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author | 2005-04-16 15:20:36 -0700 | |
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committer | 2005-04-16 15:20:36 -0700 | |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/adfs_fs.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/adfs_fs.h')
-rw-r--r-- | include/linux/adfs_fs.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/include/linux/adfs_fs.h b/include/linux/adfs_fs.h new file mode 100644 index 000000000000..4a5d50c2bdbf --- /dev/null +++ b/include/linux/adfs_fs.h @@ -0,0 +1,76 @@ +#ifndef _ADFS_FS_H +#define _ADFS_FS_H + +#include <linux/types.h> + +/* + * Disc Record at disc address 0xc00 + */ +struct adfs_discrecord { + __u8 log2secsize; + __u8 secspertrack; + __u8 heads; + __u8 density; + __u8 idlen; + __u8 log2bpmb; + __u8 skew; + __u8 bootoption; + __u8 lowsector; + __u8 nzones; + __le16 zone_spare; + __le32 root; + __le32 disc_size; + __le16 disc_id; + __u8 disc_name[10]; + __le32 disc_type; + __le32 disc_size_high; + __u8 log2sharesize:4; + __u8 unused40:4; + __u8 big_flag:1; + __u8 unused41:1; + __u8 nzones_high; + __le32 format_version; + __le32 root_size; + __u8 unused52[60 - 52]; +}; + +#define ADFS_DISCRECORD (0xc00) +#define ADFS_DR_OFFSET (0x1c0) +#define ADFS_DR_SIZE 60 +#define ADFS_DR_SIZE_BITS (ADFS_DR_SIZE << 3) +#define ADFS_SUPER_MAGIC 0xadf5 + +#ifdef __KERNEL__ +#include <linux/adfs_fs_i.h> +#include <linux/adfs_fs_sb.h> +/* + * Calculate the boot block checksum on an ADFS drive. Note that this will + * appear to be correct if the sector contains all zeros, so also check that + * the disk size is non-zero!!! + */ +static inline int adfs_checkbblk(unsigned char *ptr) +{ + unsigned int result = 0; + unsigned char *p = ptr + 511; + + do { + result = (result & 0xff) + (result >> 8); + result = result + *--p; + } while (p != ptr); + + return (result & 0xff) != ptr[511]; +} + +static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + +static inline struct adfs_inode_info *ADFS_I(struct inode *inode) +{ + return container_of(inode, struct adfs_inode_info, vfs_inode); +} + +#endif + +#endif |