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#ifndef _AFFS_FS_I
#define _AFFS_FS_I
#include <linux/a.out.h>
#include <linux/fs.h>
#include <asm/semaphore.h>
#define AFFS_CACHE_SIZE PAGE_SIZE
//#define AFFS_CACHE_SIZE (4*4)
#define AFFS_MAX_PREALLOC 32
#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
struct affs_ext_key {
u32 ext; /* idx of the extended block */
u32 key; /* block number */
};
/*
* affs fs inode data in memory
*/
struct affs_inode_info {
u32 i_opencnt;
struct semaphore i_link_lock; /* Protects internal inode access. */
struct semaphore i_ext_lock; /* Protects internal inode access. */
#define i_hash_lock i_ext_lock
u32 i_blkcnt; /* block count */
u32 i_extcnt; /* extended block count */
u32 *i_lc; /* linear cache of extended blocks */
u32 i_lc_size;
u32 i_lc_shift;
u32 i_lc_mask;
struct affs_ext_key *i_ac; /* associative cache of extended blocks */
u32 i_ext_last; /* last accessed extended block */
struct buffer_head *i_ext_bh; /* bh of last extended block */
loff_t mmu_private;
u32 i_protect; /* unused attribute bits */
u32 i_lastalloc; /* last allocated block */
int i_pa_cnt; /* number of preallocated blocks */
#if 0
s32 i_original; /* if != 0, this is the key of the original */
u32 i_data[AFFS_MAX_PREALLOC]; /* preallocated blocks */
int i_cache_users; /* Cache cannot be freed while > 0 */
unsigned char i_hlink; /* This is a fake */
unsigned char i_pad;
s32 i_parent; /* parent ino */
#endif
struct inode vfs_inode;
};
/* short cut to get to the affs specific inode data */
static inline struct affs_inode_info *AFFS_I(struct inode *inode)
{
return list_entry(inode, struct affs_inode_info, vfs_inode);
}
#endif
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