include/linux/affs_fs_sb.h

   1 #ifndef _AFFS_FS_SB
   2 #define _AFFS_FS_SB
   3
   4 /*
   5  * super-block data in memory
   6  *
   7  * Block numbers are adjusted for their actual size
   8  *
   9  */
  10
  11 #define MAX_ZONES               8
  12 #define AFFS_DATA_MIN_FREE      512     /* Number of free blocks in zone for data blocks */
  13 #define AFFS_HDR_MIN_FREE       128     /* Same for header blocks */
  14 #define AFFS_ZONE_SIZE          1024    /* Blocks per alloc zone, must be multiple of 32 */
  15
  16 struct affs_bm_info {
  17         struct buffer_head *bm_bh;      /* Buffer head if loaded (bm_count > 0) */
  18         s32 bm_firstblk;                /* Block number of first bit in this map */
  19         s32 bm_key;                     /* Disk block number */
  20         int bm_count;                   /* Usage counter */
  21 };
  22
  23 struct affs_alloc_zone {
  24         short az_size;                  /* Size of this allocation zone in double words */
  25         short az_count;                 /* Number of users */
  26         int az_free;                    /* Free blocks in here (no. of bits) */
  27 };
  28
  29 struct affs_zone {
  30         unsigned long z_ino;            /* Associated inode number */
  31         struct affs_bm_info *z_bm;      /* Zone lies in this bitmap */
  32         int z_start;                    /* Index of first word in bitmap */
  33         int z_end;                      /* Index of last word in zone + 1 */
  34         int z_az_no;                    /* Zone number */
  35         unsigned long z_lru_time;       /* Time of last usage */
  36 };
  37
  38 struct affs_sb_info {
  39         int s_partition_size;           /* Partition size in blocks. */
  40         int s_blksize;                  /* Initial device blksize */
  41         s32 s_root_block;               /* FFS root block number. */
  42         int s_hashsize;                 /* Size of hash table. */
  43         unsigned long s_flags;          /* See below. */
  44         s16 s_uid;                      /* uid to override */
  45         s16 s_gid;                      /* gid to override */
  46         umode_t s_mode;                 /* mode to override */
  47         int s_reserved;                 /* Number of reserved blocks. */
  48         struct buffer_head *s_root_bh;  /* Cached root block. */
  49         struct affs_bm_info *s_bitmap;  /* Bitmap infos. */
  50         int s_bm_count;                 /* Number of bitmap blocks. */
  51         int s_nextzone;                 /* Next zone to look for free blocks. */
  52         int s_num_az;                   /* Total number of alloc zones. */
  53         struct affs_zone *s_zones;      /* The zones themselves. */
  54         struct affs_alloc_zone *s_alloc;/* The allocation zones. */
  55         char *s_zonemap;                /* Bitmap for allocation zones. */
  56         char *s_prefix;                 /* Prefix for volumes and assigns. */
  57         int s_prefix_len;               /* Length of prefix. */
  58         char s_volume[32];              /* Volume prefix for absolute symlinks. */
  59 };
  60
  61 #define SF_INTL         0x0001          /* International filesystem. */
  62 #define SF_BM_VALID     0x0002          /* Bitmap is valid. */
  63 #define SF_IMMUTABLE    0x0004          /* Protection bits cannot be changed */
  64 #define SF_QUIET        0x0008          /* chmod errors will be not reported */
  65 #define SF_SETUID       0x0010          /* Ignore Amiga uid */
  66 #define SF_SETGID       0x0020          /* Ignore Amiga gid */
  67 #define SF_SETMODE      0x0040          /* Ignore Amiga protection bits */
  68 #define SF_MUFS         0x0100          /* Use MUFS uid/gid mapping */
  69 #define SF_OFS          0x0200          /* Old filesystem */
  70 #define SF_PREFIX       0x0400          /* Buffer for prefix is allocated */
  71 #define SF_VERBOSE      0x0800          /* Talk about fs when mounting */
  72 #define SF_READONLY     0x1000          /* Don't allow to remount rw */
  73
  74 #endif