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jcastillo |
#ifndef _AFFS_FS_SB
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#define _AFFS_FS_SB
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/*
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* super-block data in memory
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*
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* Block numbers are adjusted for their actual size
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*
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*/
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#define MAX_ZONES 8
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#define AFFS_DATA_MIN_FREE 512 /* Number of free blocks in zone for data blocks */
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#define AFFS_HDR_MIN_FREE 128 /* Same for header blocks */
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#define AFFS_ZONE_SIZE 1024 /* Blocks per alloc zone, must be multiple of 32 */
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struct affs_bm_info {
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struct buffer_head *bm_bh; /* Buffer head if loaded (bm_count > 0) */
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int bm_firstblk; /* Block number of first bit in this map */
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int bm_key; /* Disk block number */
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int bm_count; /* Usage counter */
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};
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struct affs_alloc_zone {
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short az_size; /* Size of this allocation zone in double words */
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short az_count; /* Number of users */
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int az_free; /* Free blocks in here (no. of bits) */
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};
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struct affs_zone {
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unsigned long z_ino; /* Associated inode number */
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struct affs_bm_info *z_bm; /* Zone lies in this bitmap */
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int z_start; /* Index of first word in bitmap */
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int z_end; /* Index of last word in zone + 1 */
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int z_az_no; /* Zone number */
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unsigned long z_lru_time; /* Time of last usage */
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};
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struct affs_sb_info {
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int s_partition_size; /* Partition size in blocks. */
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int s_root_block; /* FFS root block number. */
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int s_hashsize; /* Size of hash table. */
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unsigned long s_flags; /* See below. */
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short s_uid; /* uid to override */
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short s_gid; /* gid to override */
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umode_t s_mode; /* mode to override */
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int s_reserved; /* Number of reserved blocks. */
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struct buffer_head *s_root_bh; /* Cached root block. */
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struct affs_bm_info *s_bitmap; /* Bitmap infos. */
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int s_bm_count; /* Number of bitmap blocks. */
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int s_nextzone; /* Next zone to look for free blocks. */
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int s_num_az; /* Total number of alloc zones. */
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struct affs_zone *s_zones; /* The zones themselves. */
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struct affs_alloc_zone *s_alloc;/* The allocation zones. */
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char *s_zonemap; /* Bitmap for allocation zones. */
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char *s_prefix; /* Prefix for volumes and assigns. */
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int s_prefix_len; /* Length of prefix. */
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char s_volume[32]; /* Volume prefix for absolute symlinks. */
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};
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#define SF_INTL 0x0001 /* International filesystem. */
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#define SF_BM_VALID 0x0002 /* Bitmap is valid. */
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#define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
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#define SF_QUIET 0x0008 /* chmod errors will be not reported */
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#define SF_SETUID 0x0010 /* Ignore Amiga uid */
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#define SF_SETGID 0x0020 /* Ignore Amiga gid */
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#define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
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#define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
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#define SF_OFS 0x0200 /* Old filesystem */
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#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
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#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
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#endif
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