diff options
Diffstat (limited to 'include/linux/sysv_fs_sb.h')
| -rw-r--r-- | include/linux/sysv_fs_sb.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/include/linux/sysv_fs_sb.h b/include/linux/sysv_fs_sb.h new file mode 100644 index 000000000..c95e071b2 --- /dev/null +++ b/include/linux/sysv_fs_sb.h @@ -0,0 +1,120 @@ +#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 */ + /* 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_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 + |