#ifndef _SYSV_FS_SB #define _SYSV_FS_SB /* * SystemV/Coherent super-block data in memory * The SystemV/Coherent superblock contains dynamic data (it gets modified * while the system is running). This is in contrast to the Minix and Berkeley * filesystems (where the superblock is never modified). This affects the * sync() operation: we must keep the superblock in a disk buffer and use this * one as our "working copy". */ struct sysv_sb_info { int s_type; /* file system type: FSTYPE_{XENIX|SYSV|COH} */ unsigned int s_block_size; /* zone size, = 512 or = 1024 */ unsigned int s_block_size_1; /* block_size - 1 */ unsigned int s_block_size_bits; /* log2(block_size) */ unsigned int s_block_size_ratio; /* BLOCK_SIZE / block_size */ unsigned int s_block_size_ratio_bits; /* log2(block_size_ratio) */ char s_convert; /* flag whether byte ordering requires conversion */ char s_kludge_symlinks; /* flag whether symlinks have a kludgey mode */ char s_truncate; /* if 1: names > SYSV_NAMELEN chars are truncated */ /* if 0: they are disallowed (ENAMETOOLONG) */ nlink_t s_link_max; /* max number of hard links to a file */ unsigned int s_inodes_per_block; /* number of inodes per block */ unsigned int s_inodes_per_block_1; /* inodes_per_block - 1 */ unsigned int s_inodes_per_block_bits; /* log2(inodes_per_block) */ unsigned int s_ind_per_block; /* number of indirections per block */ unsigned int s_ind_per_block_1; /* ind_per_block - 1 */ unsigned int s_ind_per_block_bits; /* log2(ind_per_block) */ unsigned int s_ind_per_block_2; /* ind_per_block ^ 2 */ unsigned int s_ind_per_block_2_1; /* ind_per_block ^ 2 - 1 */ unsigned int s_ind_per_block_2_bits; /* log2(ind_per_block^2) */ unsigned int s_ind_per_block_3; /* ind_per_block ^ 3 */ unsigned int s_ind_per_block_block_size_1; /* ind_per_block*block_size - 1 */ unsigned int s_ind_per_block_block_size_bits; /* log2(ind_per_block*block_size) */ unsigned int s_ind_per_block_2_block_size_1; /* ind_per_block^2 * block_size - 1 */ unsigned int s_ind_per_block_2_block_size_bits; /* log2(ind_per_block^2 * block_size) */ unsigned int s_ind0_size; /* 10 * block_size */ unsigned int s_ind1_size; /* (10 + ipb) * block_size */ unsigned int s_ind2_size; /* (10 + ipb + ipb^2) * block_size */ unsigned int s_toobig_block; /* 10 + ipb + ipb^2 + ipb^3 */ unsigned int s_block_base; /* physical block number of block 0 */ unsigned short s_fic_size; /* free inode cache size, NICINOD */ unsigned short s_flc_size; /* free block list chunk size, NICFREE */ /* The superblock is kept in one or two disk buffers: */ struct buffer_head *s_bh1; struct buffer_head *s_bh2; /* These are pointers into the disk buffer, to compensate for different superblock layout. */ char * s_sbd1; /* entire superblock data, for part 1 */ char * s_sbd2; /* entire superblock data, for part 2 */ unsigned short *s_sb_fic_count; /* pointer to s_sbd->s_ninode */ unsigned short *s_sb_fic_inodes; /* pointer to s_sbd->s_inode */ unsigned short *s_sb_total_free_inodes; /* pointer to s_sbd->s_tinode */ unsigned short *s_sb_flc_count; /* pointer to s_sbd->s_nfree */ unsigned long *s_sb_flc_blocks; /* pointer to s_sbd->s_free */ unsigned long *s_sb_total_free_blocks;/* pointer to s_sbd->s_tfree */ unsigned long *s_sb_time; /* pointer to s_sbd->s_time */ unsigned long *s_sb_state; /* pointer to s_sbd->s_state, only FSTYPE_SYSV */ /* We keep those superblock entities that don't change here; this saves us an indirection and perhaps a conversion. */ unsigned long s_firstinodezone; /* index of first inode zone */ unsigned long s_firstdatazone; /* same as s_sbd->s_isize */ unsigned long s_ninodes; /* total number of inodes */ unsigned long s_ndatazones; /* total number of data zones */ unsigned long s_nzones; /* same as s_sbd->s_fsize */ }; /* The fields s_block_size_ratio, s_ind_per_block_2_1, s_toobig_block are currently unused. */ /* sv_ == u.sysv_sb.s_ */ #define sv_type u.sysv_sb.s_type #define sv_block_size u.sysv_sb.s_block_size #define sv_block_size_1 u.sysv_sb.s_block_size_1 #define sv_block_size_bits u.sysv_sb.s_block_size_bits #define sv_block_size_ratio u.sysv_sb.s_block_size_ratio #define sv_block_size_ratio_bits u.sysv_sb.s_block_size_ratio_bits #define sv_convert u.sysv_sb.s_convert #define sv_kludge_symlinks u.sysv_sb.s_kludge_symlinks #define sv_truncate u.sysv_sb.s_truncate #define sv_link_max u.sysv_sb.s_link_max #define sv_inodes_per_block u.sysv_sb.s_inodes_per_block #define sv_inodes_per_block_1 u.sysv_sb.s_inodes_per_block_1 #define sv_inodes_per_block_bits u.sysv_sb.s_inodes_per_block_bits #define sv_ind_per_block u.sysv_sb.s_ind_per_block #define sv_ind_per_block_1 u.sysv_sb.s_ind_per_block_1 #define sv_ind_per_block_bits u.sysv_sb.s_ind_per_block_bits #define sv_ind_per_block_2 u.sysv_sb.s_ind_per_block_2 #define sv_ind_per_block_2_1 u.sysv_sb.s_ind_per_block_2_1 #define sv_ind_per_block_2_bits u.sysv_sb.s_ind_per_block_2_bits #define sv_ind_per_block_3 u.sysv_sb.s_ind_per_block_3 #define sv_ind_per_block_block_size_1 u.sysv_sb.s_ind_per_block_block_size_1 #define sv_ind_per_block_block_size_bits u.sysv_sb.s_ind_per_block_block_size_bits #define sv_ind_per_block_2_block_size_1 u.sysv_sb.s_ind_per_block_2_block_size_1 #define sv_ind_per_block_2_block_size_bits u.sysv_sb.s_ind_per_block_2_block_size_bits #define sv_ind0_size u.sysv_sb.s_ind0_size #define sv_ind1_size u.sysv_sb.s_ind1_size #define sv_ind2_size u.sysv_sb.s_ind2_size #define sv_toobig_block u.sysv_sb.s_toobig_block #define sv_block_base u.sysv_sb.s_block_base #define sv_fic_size u.sysv_sb.s_fic_size #define sv_flc_size u.sysv_sb.s_flc_size #define sv_bh1 u.sysv_sb.s_bh1 #define sv_bh2 u.sysv_sb.s_bh2 #define sv_sbd1 u.sysv_sb.s_sbd1 #define sv_sbd2 u.sysv_sb.s_sbd2 #define sv_sb_fic_count u.sysv_sb.s_sb_fic_count #define sv_sb_fic_inodes u.sysv_sb.s_sb_fic_inodes #define sv_sb_total_free_inodes u.sysv_sb.s_sb_total_free_inodes #define sv_sb_flc_count u.sysv_sb.s_sb_flc_count #define sv_sb_flc_blocks u.sysv_sb.s_sb_flc_blocks #define sv_sb_total_free_blocks u.sysv_sb.s_sb_total_free_blocks #define sv_sb_time u.sysv_sb.s_sb_time #define sv_sb_state u.sysv_sb.s_sb_state #define sv_firstinodezone u.sysv_sb.s_firstinodezone #define sv_firstdatazone u.sysv_sb.s_firstdatazone #define sv_ninodes u.sysv_sb.s_ninodes #define sv_ndatazones u.sysv_sb.s_ndatazones #define sv_nzones u.sysv_sb.s_nzones #endif