1#ifndef _AFFS_FS_I 2#define _AFFS_FS_I 3 4#include <linux/a.out.h> 5#include <linux/fs.h> 6#include <asm/semaphore.h> 7 8#define AFFS_CACHE_SIZE PAGE_SIZE 9//#define AFFS_CACHE_SIZE (4*4) 10 11#define AFFS_MAX_PREALLOC 32 12#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2) 13#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2) 14#define AFFS_AC_MASK (AFFS_AC_SIZE-1) 15 16struct affs_ext_key { 17 u32 ext; /* idx of the extended block */ 18 u32 key; /* block number */ 19}; 20 21/* 22 * affs fs inode data in memory 23 */ 24struct affs_inode_info { 25 u32 i_opencnt; 26 struct semaphore i_link_lock; /* Protects internal inode access. */ 27 struct semaphore i_ext_lock; /* Protects internal inode access. */ 28#define i_hash_lock i_ext_lock 29 u32 i_blkcnt; /* block count */ 30 u32 i_extcnt; /* extended block count */ 31 u32 *i_lc; /* linear cache of extended blocks */ 32 u32 i_lc_size; 33 u32 i_lc_shift; 34 u32 i_lc_mask; 35 struct affs_ext_key *i_ac; /* associative cache of extended blocks */ 36 u32 i_ext_last; /* last accessed extended block */ 37 struct buffer_head *i_ext_bh; /* bh of last extended block */ 38 loff_t mmu_private; 39 u32 i_protect; /* unused attribute bits */ 40 u32 i_lastalloc; /* last allocated block */ 41 int i_pa_cnt; /* number of preallocated blocks */ 42#if 0 43 s32 i_original; /* if != 0, this is the key of the original */ 44 u32 i_data[AFFS_MAX_PREALLOC]; /* preallocated blocks */ 45 int i_cache_users; /* Cache cannot be freed while > 0 */ 46 unsigned char i_hlink; /* This is a fake */ 47 unsigned char i_pad; 48 s32 i_parent; /* parent ino */ 49#endif 50 struct inode vfs_inode; 51}; 52 53/* short cut to get to the affs specific inode data */ 54static inline struct affs_inode_info *AFFS_I(struct inode *inode) 55{ 56 return list_entry(inode, struct affs_inode_info, vfs_inode); 57} 58 59#endif 60