amigaffs.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:6k
- #ifndef AMIGAFFS_H
- #define AMIGAFFS_H
- #include <linux/types.h>
- #include <linux/locks.h>
- #include <asm/byteorder.h>
- /* AmigaOS allows file names with up to 30 characters length.
- * Names longer than that will be silently truncated. If you
- * want to disallow this, comment out the following #define.
- * Creating filesystem objects with longer names will then
- * result in an error (ENAMETOOLONG).
- */
- /*#define AFFS_NO_TRUNCATE */
- /* Ugly macros make the code more pretty. */
- #define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
- #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
- #define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[(sb)->u.affs_sb.s_hashsize-1-(blk)])
- static inline void
- affs_set_blocksize(struct super_block *sb, int size)
- {
- set_blocksize(sb->s_dev, size);
- sb->s_blocksize = size;
- }
- static inline struct buffer_head *
- affs_bread(struct super_block *sb, int block)
- {
- pr_debug(KERN_DEBUG "affs_bread: %dn", block);
- if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
- return sb_bread(sb, block);
- return NULL;
- }
- static inline struct buffer_head *
- affs_getblk(struct super_block *sb, int block)
- {
- pr_debug(KERN_DEBUG "affs_getblk: %dn", block);
- if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
- return sb_getblk(sb, block);
- return NULL;
- }
- static inline struct buffer_head *
- affs_getzeroblk(struct super_block *sb, int block)
- {
- struct buffer_head *bh;
- pr_debug(KERN_DEBUG "affs_getzeroblk: %dn", block);
- if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
- bh = sb_getblk(sb, block);
- lock_buffer(bh);
- memset(bh->b_data, 0 , sb->s_blocksize);
- mark_buffer_uptodate(bh, 1);
- unlock_buffer(bh);
- return bh;
- }
- return NULL;
- }
- static inline struct buffer_head *
- affs_getemptyblk(struct super_block *sb, int block)
- {
- struct buffer_head *bh;
- pr_debug(KERN_DEBUG "affs_getemptyblk: %dn", block);
- if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
- bh = sb_getblk(sb, block);
- wait_on_buffer(bh);
- mark_buffer_uptodate(bh, 1);
- return bh;
- }
- return NULL;
- }
- static inline void
- affs_brelse(struct buffer_head *bh)
- {
- if (bh)
- pr_debug(KERN_DEBUG "affs_brelse: %ldn", bh->b_blocknr);
- brelse(bh);
- }
- static inline void
- affs_adjust_checksum(struct buffer_head *bh, u32 val)
- {
- u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[5]);
- ((u32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
- }
- static inline void
- affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
- {
- u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[0]);
- ((u32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
- }
- static inline void
- affs_lock_link(struct inode *inode)
- {
- down(&AFFS_INODE->i_link_lock);
- }
- static inline void
- affs_unlock_link(struct inode *inode)
- {
- up(&AFFS_INODE->i_link_lock);
- }
- static inline void
- affs_lock_dir(struct inode *inode)
- {
- down(&AFFS_INODE->i_hash_lock);
- }
- static inline void
- affs_unlock_dir(struct inode *inode)
- {
- up(&AFFS_INODE->i_hash_lock);
- }
- static inline void
- affs_lock_ext(struct inode *inode)
- {
- down(&AFFS_INODE->i_ext_lock);
- }
- static inline void
- affs_unlock_ext(struct inode *inode)
- {
- up(&AFFS_INODE->i_ext_lock);
- }
- #ifdef __LITTLE_ENDIAN
- #define BO_EXBITS 0x18UL
- #elif defined(__BIG_ENDIAN)
- #define BO_EXBITS 0x00UL
- #else
- #error Endianness must be known for affs to work.
- #endif
- #define FS_OFS 0x444F5300
- #define FS_FFS 0x444F5301
- #define FS_INTLOFS 0x444F5302
- #define FS_INTLFFS 0x444F5303
- #define FS_DCOFS 0x444F5304
- #define FS_DCFFS 0x444F5305
- #define MUFS_FS 0x6d754653 /* 'muFS' */
- #define MUFS_OFS 0x6d754600 /* 'muF ' */
- #define MUFS_FFS 0x6d754601 /* 'muF1' */
- #define MUFS_INTLOFS 0x6d754602 /* 'muF2' */
- #define MUFS_INTLFFS 0x6d754603 /* 'muF3' */
- #define MUFS_DCOFS 0x6d754604 /* 'muF4' */
- #define MUFS_DCFFS 0x6d754605 /* 'muF5' */
- #define T_SHORT 2
- #define T_LIST 16
- #define T_DATA 8
- #define ST_LINKFILE -4
- #define ST_FILE -3
- #define ST_ROOT 1
- #define ST_USERDIR 2
- #define ST_SOFTLINK 3
- #define ST_LINKDIR 4
- #define AFFS_ROOT_BMAPS 25
- #define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
- #define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
- #define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
- #define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
- #define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
- #define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
- struct affs_date {
- u32 days;
- u32 mins;
- u32 ticks;
- };
- struct affs_short_date {
- u16 days;
- u16 mins;
- u16 ticks;
- };
- struct affs_root_head {
- u32 ptype;
- u32 spare1;
- u32 spare2;
- u32 hash_size;
- u32 spare3;
- u32 checksum;
- u32 hashtable[1];
- };
- struct affs_root_tail {
- u32 bm_flag;
- u32 bm_blk[AFFS_ROOT_BMAPS];
- u32 bm_ext;
- struct affs_date root_change;
- u8 disk_name[32];
- u32 spare1;
- u32 spare2;
- struct affs_date disk_change;
- struct affs_date disk_create;
- u32 spare3;
- u32 spare4;
- u32 dcache;
- u32 stype;
- };
- struct affs_head {
- u32 ptype;
- u32 key;
- u32 block_count;
- u32 spare1;
- u32 first_data;
- u32 checksum;
- u32 table[1];
- };
- struct affs_tail {
- u32 spare1;
- u16 uid;
- u16 gid;
- u32 protect;
- u32 size;
- u8 comment[92];
- struct affs_date change;
- u8 name[32];
- u32 spare2;
- u32 original;
- u32 link_chain;
- u32 spare[5];
- u32 hash_chain;
- u32 parent;
- u32 extension;
- u32 stype;
- };
- struct slink_front
- {
- u32 ptype;
- u32 key;
- u32 spare1[3];
- u32 checksum;
- u8 symname[1]; /* depends on block size */
- };
- struct affs_data_head
- {
- u32 ptype;
- u32 key;
- u32 sequence;
- u32 size;
- u32 next;
- u32 checksum;
- u8 data[1]; /* depends on block size */
- };
- /* Permission bits */
- #define FIBF_OTR_READ 0x8000
- #define FIBF_OTR_WRITE 0x4000
- #define FIBF_OTR_EXECUTE 0x2000
- #define FIBF_OTR_DELETE 0x1000
- #define FIBF_GRP_READ 0x0800
- #define FIBF_GRP_WRITE 0x0400
- #define FIBF_GRP_EXECUTE 0x0200
- #define FIBF_GRP_DELETE 0x0100
- #define FIBF_HIDDEN 0x0080
- #define FIBF_SCRIPT 0x0040
- #define FIBF_PURE 0x0020 /* no use under linux */
- #define FIBF_ARCHIVED 0x0010 /* never set, always cleared on write */
- #define FIBF_NOREAD 0x0008 /* 0 means allowed */
- #define FIBF_NOWRITE 0x0004 /* 0 means allowed */
- #define FIBF_NOEXECUTE 0x0002 /* 0 means allowed, ignored under linux */
- #define FIBF_NODELETE 0x0001 /* 0 means allowed */
- #define FIBF_OWNER 0x000F /* Bits pertaining to owner */
- #define FIBF_MASK 0xEE0E /* Bits modified by Linux */
- #endif