/* * 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 1.1 2001/04/27 21:55:09 bencollins Exp $ * */ #ifndef __LINUX_UFS_FS_H #define __LINUX_UFS_FS_H #include #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 */