diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1997-01-07 02:33:00 +0000 |
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committer | <ralf@linux-mips.org> | 1997-01-07 02:33:00 +0000 |
commit | beb116954b9b7f3bb56412b2494b562f02b864b1 (patch) | |
tree | 120e997879884e1b9d93b265221b939d2ef1ade1 /include/linux/ufs_fs.h | |
parent | 908d4681a1dc3792ecafbe64265783a86c4cccb6 (diff) |
Import of Linux/MIPS 2.1.14
Diffstat (limited to 'include/linux/ufs_fs.h')
-rw-r--r-- | include/linux/ufs_fs.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/include/linux/ufs_fs.h b/include/linux/ufs_fs.h new file mode 100644 index 000000000..af856645d --- /dev/null +++ b/include/linux/ufs_fs.h @@ -0,0 +1,270 @@ +/* + * linux/include/linux/ufs_fs.h + * + * Copyright (C) 1996 + * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) + * Laboratory for Computer Science Research Computing Facility + * Rutgers, The State University of New Jersey + * + * $Id: ufs_fs.h,v 1.7 1996/08/13 19:27:59 ecd Exp $ + * + */ + +#ifndef __LINUX_UFS_FS_H +#define __LINUX_UFS_FS_H + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/time.h> +#include <linux/stat.h> + +#define UFS_BBLOCK 0 +#define UFS_BBSIZE 8192 +#define UFS_SBLOCK 8192 +#define UFS_SBSIZE 8192 + +#define UFS_MAGIC 0x00011954 + +#define UFS_FSIZE 1024 +#define UFS_BSIZE 8192 + +#define UFS_NDADDR 12 +#define UFS_NINDIR 3 + +#define UFS_IND_BLOCK (UFS_NDADDR + 0) +#define UFS_DIND_BLOCK (UFS_NDADDR + 1) +#define UFS_TIND_BLOCK (UFS_NDADDR + 2) + +#define UFS_ROOTINO 2 + +#define UFS_USEEFT ((__u16)65535) + +#define UFS_FSOK 0x7c269d38 +#define UFS_FSACTIVE ((char)0x00) +#define UFS_FSCLEAN ((char)0x01) +#define UFS_FSSTABLE ((char)0x02) +#define UFS_FSBAD ((char)0xff) + +/* Flags for ufs_sb_info */ +#define UFS_DEBUG 0x00000001 +#define UFS_DEBUG_INODE 0x00000002 +#define UFS_DEBUG_NAMEI 0x00000004 +#define UFS_DEBUG_LINKS 0x00000008 + +#define UFS_ADDR_PER_BLOCK(sb) ((sb)->u.ufs_sb.s_bsize >> 2) +#define UFS_ADDR_PER_BLOCK_BITS(sb) ((sb)->u.ufs_sb.s_bshift - 2) + +/* Test if the inode number is valid. */ +#define ufs_ino_ok(inode) ((inode->i_ino < 2) && \ + (inode->i_ino > (inode->i_sb->u.ufs_sb.s_ncg * inode->i_sb->u.ufs_sb.s_ipg - 1))) + +/* Convert (sb,cg) to the first physical block number for that cg. */ +#define ufs_cgstart(sb, cg) \ + (((sb)->u.ufs_sb.s_fpg * (cg)) + (sb)->u.ufs_sb.s_cgoffset * ((cg) & ~((sb)->u.ufs_sb.s_cgmask))) + +/* Convert (sb,cg) to the first phys. block number for inodes in that cg. */ +#define ufs_cgimin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_iblkno) +#define ufs_cgdmin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_dblkno) + +/* Convert an inode number to a cg number. */ +/* XXX - this can be optimized if s_ipg is a power of 2. */ +#define ufs_ino2cg(inode) ((inode)->i_ino/(inode)->i_sb->u.ufs_sb.s_ipg) + +#define UFS_MAXNAMLEN 255 + +#define ufs_lbn(sb, block) ((block) >> (sb)->u.ufs_sb.s_lshift) +#define ufs_boff(sb, block) ((block) & ~((sb)->u.ufs_sb.s_lmask)) +#define ufs_dbn(sb, block, boff) ((block) + ufs_boff((sb), (boff))) + +struct ufs_direct { + __u32 d_ino; /* inode number of this entry */ + __u16 d_reclen; /* length of this entry */ + __u16 d_namlen; /* actual length of d_name */ + char d_name[UFS_MAXNAMLEN + 1]; /* file name */ +}; + +#define MAXMNTLEN 512 +#define MAXCSBUFS 32 + +struct ufs_csum { + __u32 cs_ndir; /* number of directories */ + __u32 cs_nbfree; /* number of free blocks */ + __u32 cs_nifree; /* number of free inodes */ + __u32 cs_nffree; /* number of free frags */ +}; + +typedef struct _ufsquad { + __u32 val[2]; +} ufsquad; + +/* + * This is the actual superblock, as it is laid out on the disk. + */ +struct ufs_superblock { + __u32 fs_link; /* UNUSED */ + __u32 fs_rlink; /* UNUSED */ + __u32 fs_sblkno; /* addr of super-block in filesys */ + __u32 fs_cblkno; /* offset of cyl-block in filesys */ + __u32 fs_iblkno; /* offset of inode-blocks in filesys */ + __u32 fs_dblkno; /* offset of first data after cg */ + __u32 fs_cgoffset; /* cylinder group offset in cylinder */ + __u32 fs_cgmask; /* used to calc mod fs_ntrak */ + time_t fs_time; /* last time written */ + __u32 fs_size; /* number of blocks in fs */ + __u32 fs_dsize; /* number of data blocks in fs */ + __u32 fs_ncg; /* number of cylinder groups */ + __u32 fs_bsize; /* size of basic blocks in fs */ + __u32 fs_fsize; /* size of frag blocks in fs */ + __u32 fs_frag; /* number of frags in a block in fs */ +/* these are configuration parameters */ + __u32 fs_minfree; /* minimum percentage of free blocks */ + __u32 fs_rotdelay; /* num of ms for optimal next block */ + __u32 fs_rps; /* disk revolutions per second */ +/* these fields can be computed from the others */ + __u32 fs_bmask; /* ``blkoff'' calc of blk offsets */ + __u32 fs_fmask; /* ``fragoff'' calc of frag offsets */ + __u32 fs_bshift; /* ``lblkno'' calc of logical blkno */ + __u32 fs_fshift; /* ``numfrags'' calc number of frags */ +/* these are configuration parameters */ + __u32 fs_maxcontig; /* max number of contiguous blks */ + __u32 fs_maxbpg; /* max number of blks per cyl group */ +/* these fields can be computed from the others */ + __u32 fs_fragshift; /* block to frag shift */ + __u32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ + __u32 fs_sbsize; /* actual size of super block */ + __u32 fs_csmask; /* csum block offset */ + __u32 fs_csshift; /* csum block number */ + __u32 fs_nindir; /* value of NINDIR */ + __u32 fs_inopb; /* value of INOPB */ + __u32 fs_nspf; /* value of NSPF */ +/* yet another configuration parameter */ + __u32 fs_optim; /* optimization preference, see below */ +/* these fields are derived from the hardware */ + __u32 fs_npsect; /* # sectors/track including spares */ + __u32 fs_interleave; /* hardware sector interleave */ + __u32 fs_trackskew; /* sector 0 skew, per track */ +/* a unique id for this filesystem (currently unused and unmaintained) */ +/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ +/* Neither of those fields is used in the Tahoe code right now but */ +/* there could be problems if they are. */ + __u32 fs_id[2]; /* file system id */ +/* sizes determined by number of cylinder groups and their sizes */ + __u32 fs_csaddr; /* blk addr of cyl grp summary area */ + __u32 fs_cssize; /* size of cyl grp summary area */ + __u32 fs_cgsize; /* cylinder group size */ +/* these fields are derived from the hardware */ + __u32 fs_ntrak; /* tracks per cylinder */ + __u32 fs_nsect; /* sectors per track */ + __u32 fs_spc; /* sectors per cylinder */ +/* this comes from the disk driver partitioning */ + __u32 fs_ncyl; /* cylinders in file system */ +/* these fields can be computed from the others */ + __u32 fs_cpg; /* cylinders per group */ + __u32 fs_ipg; /* inodes per group */ + __u32 fs_fpg; /* blocks per group * fs_frag */ +/* this data must be re-computed after crashes */ + struct ufs_csum fs_cstotal; /* cylinder summary information */ +/* these fields are cleared at mount time */ + __u8 fs_fmod; /* super block modified flag */ + __u8 fs_clean; /* file system is clean flag */ + __u8 fs_ronly; /* mounted read-only flag */ + __u8 fs_flags; /* currently unused flag */ + __u8 fs_fsmnt[MAXMNTLEN]; /* name mounted on */ +/* these fields retain the current block allocation info */ + __u32 fs_cgrotor; /* last cg searched */ + struct ufs_csum * fs_csp[MAXCSBUFS]; /* list of fs_cs info buffers */ + __u32 fs_cpc; /* cyl per cycle in postbl */ + __u16 fs_opostbl[16][8]; /* old rotation block list head */ + __s32 fs_sparecon[55]; /* reserved for future constants */ + __s32 fs_state; /* file system state time stamp */ + ufsquad fs_qbmask; /* ~usb_bmask - for use with __s64 size */ + ufsquad fs_qfmask; /* ~usb_fmask - for use with __s64 size */ + __s32 fs_postblformat; /* format of positional layout tables */ + __s32 fs_nrpos; /* number of rotational positions */ + __s32 fs_postbloff; /* (__s16) rotation block list head */ + __s32 fs_rotbloff; /* (__u8) blocks for each rotation */ + __s32 fs_magic; /* magic number */ + __u8 fs_space[1]; /* list of blocks for each rotation */ + +}; + +/* + * structure of an on-disk inode + */ +struct ufs_inode { + __u16 ui_mode; /* 0x0 */ + __u16 ui_nlink; /* 0x2 */ + __u16 ui_suid; /* 0x4 */ + __u16 ui_sgid; /* 0x6 */ + ufsquad ui_size; /* 0x8 */ /* XXX - should be __u64 */ + struct timeval ui_atime; /* 0x10 */ + struct timeval ui_mtime; /* 0x18 */ + struct timeval ui_ctime; /* 0x20 */ + __u32 ui_db[UFS_NDADDR]; /* 0x28 data blocks */ + __u32 ui_ib[UFS_NINDIR]; /* 0x58 indirect blocks */ + __u32 ui_flags; /* 0x64 unused */ + __u32 ui_blocks; /* 0x68 blocks in use */ + __u32 ui_gen; /* 0x6c generation number XXX - what is this? */ + __u32 ui_shadow; /* 0x70 shadow inode XXX - what is this?*/ + __u32 ui_uid; /* 0x74 long EFT version of uid */ + __u32 ui_gid; /* 0x78 long EFT version of gid */ + __u32 ui_oeftflag; /* 0x7c reserved */ +}; + + +#ifdef __KERNEL__ +/* + * Function prototypes + */ + +/* ufs_inode.c */ +extern int ufs_bmap (struct inode *, int); +extern void ufs_read_inode(struct inode * inode); +extern void ufs_put_inode(struct inode * inode); + +extern void ufs_print_inode (struct inode *); + +/* ufs_namei.c */ +extern int ufs_lookup (struct inode *, const char *, int, struct inode **); + +/* ufs_super.c */ +extern void ufs_warning (struct super_block *, const char *, const char *, ...) + __attribute__ ((format (printf, 3, 4))); +extern int init_ufs_fs(void); + +/* + * Inodes and files operations + */ + +/* ufs_dir.c */ +extern struct inode_operations ufs_dir_inode_operations; +extern struct file_operations ufs_dir_operations; + +/* ufs_file.c */ +extern struct inode_operations ufs_file_inode_operations; +extern struct file_operations ufs_file_operations; + +/* ufs_symlink.c */ +extern struct inode_operations ufs_symlink_inode_operations; +extern struct file_operations ufs_symlink_operations; + +/* Byte swapping 32/16-bit quantities into little endian format. */ +extern int ufs_need_swab; + +extern __inline__ __u32 ufs_swab32(__u32 value) +{ + return (ufs_need_swab ? ((value >> 24) | + ((value >> 8) & 0xff00) | + ((value << 8) & 0xff0000) | + (value << 24)) : value); +} + +extern __inline__ __u16 ufs_swab16(__u16 value) +{ + return (ufs_need_swab ? ((value >> 8) | + (value << 8)) : value); +} + +#endif /* __KERNEL__ */ + +#endif /* __LINUX_UFS_FS_H */ |