include/linux/affs_fs_i.h

   1 #ifndef _AFFS_FS_I
   2 #define _AFFS_FS_I
   3
   4 #include <linux/a.out.h>
   5 #include <linux/time.h>
   6
   7 #define AFFS_MAX_PREALLOC       16      /* MUST be a power of 2 */
   8 #define AFFS_KCSIZE             73      /* Allows for 1 extension block at 512 byte-blocks */
   9
  10 struct key_cache {
  11         struct timeval   kc_lru_time;   /* Last time this cache was used */
  12         s32      kc_first;              /* First cached key */
  13         s32      kc_last;               /* Last cached key */
  14         s32      kc_this_key;           /* Key of extension block this data block keys are from */
  15         int      kc_this_seq;           /* Sequence number of this extension block */
  16         s32      kc_next_key;           /* Key of next extension block */
  17         s32      kc_keys[AFFS_KCSIZE];  /* Key cache */
  18 };
  19
  20 #define EC_SIZE (PAGE_SIZE - 4 * sizeof(struct key_cache) - 4) / 4
  21
  22 struct ext_cache {
  23         struct key_cache  kc[4];        /* The 4 key caches */
  24         s32      ec[EC_SIZE];           /* Keys of assorted extension blocks */
  25         int      max_ext;               /* Index of last known extension block */
  26 };
  27
  28 /*
  29  * affs fs inode data in memory
  30  */
  31 struct affs_inode_info {
  32         u32      i_protect;                     /* unused attribute bits */
  33         s32      i_parent;                      /* parent ino */
  34         s32      i_original;                    /* if != 0, this is the key of the original */
  35         s32      i_data[AFFS_MAX_PREALLOC];     /* preallocated blocks */
  36         struct ext_cache *i_ec;                 /* Cache gets allocated dynamically */
  37         int      i_cache_users;                 /* Cache cannot be freed while > 0 */
  38         int      i_lastblock;                   /* last allocated block */
  39         short    i_pa_cnt;                      /* number of preallocated blocks */
  40         short    i_pa_next;                     /* Index of next block in i_data[] */
  41         short    i_pa_last;                     /* Index of next free slot in i_data[] */
  42         short    i_zone;                        /* write zone */
  43         unsigned char i_hlink;                  /* This is a fake */
  44         unsigned char i_pad;
  45 };
  46
  47 #endif