/* * Taken from Linux kernel tree (linux/fs/ufs) * 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 * * Copyright (c) 2013 Raphael S. Carvalho * * Clean swab support by Fare * just hope no one is using NNUUXXI on __?64 structure elements * 64-bit clean thanks to Maciej W. Rozycki * * 4.4BSD (FreeBSD) support added on February 1st 1998 by * Niels Kristian Bech Jensen partially based * on code by Martin von Loewis . * * NeXTstep support added on February 5th 1998 by * Niels Kristian Bech Jensen . * * Write support by Daniel Pirkl * * HP/UX hfs filesystem support added by * Martin K. Petersen , August 1999 * * UFS2 (of FreeBSD 5.x) support added by * Niraj Kumar , Jan 2004 * */ #ifndef __LINUX_UFS_FS_H #define __LINUX_UFS_FS_H #include typedef uint64_t __fs64; typedef uint32_t __fs32; typedef uint16_t __fs16; #define UFS_BBLOCK 0 #define UFS_BBSIZE 8192 #define UFS_SBLOCK 8192 #define UFS_SBSIZE 8192 #define UFS_SECTOR_SIZE 512 #define UFS_SECTOR_BITS 9 #define UFS_MAGIC 0x00011954 #define UFS_MAGIC_BW 0x0f242697 #define UFS2_MAGIC 0x19540119 #define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */ /* Copied from FreeBSD */ /* * Each disk drive contains some number of filesystems. * A filesystem consists of a number of cylinder groups. * Each cylinder group has inodes and data. * * A filesystem is described by its super-block, which in turn * describes the cylinder groups. The super-block is critical * data and is replicated in each cylinder group to protect against * catastrophic loss. This is done at `newfs' time and the critical * super-block data does not change, so the copies need not be * referenced further unless disaster strikes. * * For filesystem fs, the offsets of the various blocks of interest * are given in the super block as: * [fs->fs_sblkno] Super-block * [fs->fs_cblkno] Cylinder group block * [fs->fs_iblkno] Inode blocks * [fs->fs_dblkno] Data blocks * The beginning of cylinder group cg in fs, is given by * the ``cgbase(fs, cg)'' macro. * * Depending on the architecture and the media, the superblock may * reside in any one of four places. For tiny media where every block * counts, it is placed at the very front of the partition. Historically, * UFS1 placed it 8K from the front to leave room for the disk label and * a small bootstrap. For UFS2 it got moved to 64K from the front to leave * room for the disk label and a bigger bootstrap, and for really piggy * systems we check at 256K from the front if the first three fail. In * all cases the size of the superblock will be SBLOCKSIZE. All values are * given in byte-offset form, so they do not imply a sector size. The * SBLOCKSEARCH specifies the order in which the locations should be searched. */ #define SBLOCK_FLOPPY 0 #define SBLOCK_UFS1 8192 #define SBLOCK_UFS2 65536 #define SBLOCK_PIGGY 262144 #define SBLOCKSIZE 8192 #define SBLOCKSEARCH \ { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } #define UFS_MAXNAMLEN 255 #define UFS_MAXMNTLEN 512 #define UFS2_MAXMNTLEN 468 #define UFS2_MAXVOLLEN 32 #define UFS_MAXCSBUFS 31 #define UFS_LINK_MAX 32000 /* #define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4) */ #define UFS2_NOCSPTRS 28 /* * UFS_DIR_PAD defines the directory entries boundaries * (must be a multiple of 4) */ #define UFS_DIR_PAD 4 #define UFS_DIR_ROUND (UFS_DIR_PAD - 1) #define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND) struct ufs_timeval { __fs32 tv_sec; __fs32 tv_usec; }; struct ufs_dir_entry { __fs32 d_ino; /* inode number of this entry */ __fs16 d_reclen; /* length of this entry */ union { __fs16 d_namlen; /* actual length of d_name */ struct { __u8 d_type; /* file type */ __u8 d_namlen; /* length of string in d_name */ } d_44; } d_u; __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */ }; struct ufs_csum { __fs32 cs_ndir; /* number of directories */ __fs32 cs_nbfree; /* number of free blocks */ __fs32 cs_nifree; /* number of free inodes */ __fs32 cs_nffree; /* number of free frags */ }; struct ufs2_csum_total { __fs64 cs_ndir; /* number of directories */ __fs64 cs_nbfree; /* number of free blocks */ __fs64 cs_nifree; /* number of free inodes */ __fs64 cs_nffree; /* number of free frags */ __fs64 cs_numclusters; /* number of free clusters */ __fs64 cs_spare[3]; /* future expansion */ }; struct ufs_csum_core { __u64 cs_ndir; /* number of directories */ __u64 cs_nbfree; /* number of free blocks */ __u64 cs_nifree; /* number of free inodes */ __u64 cs_nffree; /* number of free frags */ __u64 cs_numclusters; /* number of free clusters */ }; struct ufs_super_block { union { struct { __fs32 fs_link; /* UNUSED */ } fs_42; struct { __fs32 fs_state; /* file system state flag */ } fs_sun; } fs_u0; __fs32 fs_rlink; /* UNUSED */ __fs32 fs_sblkno; /* addr of super-block in filesys */ __fs32 fs_cblkno; /* offset of cyl-block in filesys */ __fs32 fs_iblkno; /* offset of inode-blocks in filesys */ __fs32 fs_dblkno; /* offset of first data after cg */ __fs32 fs_cgoffset; /* cylinder group offset in cylinder */ __fs32 fs_cgmask; /* used to calc mod fs_ntrak */ __fs32 fs_time; /* last time written -- time_t */ __fs32 fs_size; /* number of blocks in fs */ __fs32 fs_dsize; /* number of data blocks in fs */ __fs32 fs_ncg; /* number of cylinder groups */ __fs32 fs_bsize; /* size of basic blocks in fs */ __fs32 fs_fsize; /* size of frag blocks in fs */ __fs32 fs_frag; /* number of frags in a block in fs */ /* these are configuration parameters */ __fs32 fs_minfree; /* minimum percentage of free blocks */ __fs32 fs_rotdelay; /* num of ms for optimal next block */ __fs32 fs_rps; /* disk revolutions per second */ /* these fields can be computed from the others */ __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */ __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */ __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */ __fs32 fs_fshift; /* ``numfrags'' calc number of frags */ /* these are configuration parameters */ __fs32 fs_maxcontig; /* max number of contiguous blks */ __fs32 fs_maxbpg; /* max number of blks per cyl group */ /* these fields can be computed from the others */ __fs32 fs_fragshift; /* block to frag shift */ __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ __fs32 fs_sbsize; /* actual size of super block */ __fs32 fs_csmask; /* csum block offset */ __fs32 fs_csshift; /* csum block number */ __fs32 fs_nindir; /* value of NINDIR */ __fs32 fs_inopb; /* value of INOPB */ __fs32 fs_nspf; /* value of NSPF */ /* yet another configuration parameter */ __fs32 fs_optim; /* optimization preference, see below */ /* these fields are derived from the hardware */ union { struct { __fs32 fs_npsect; /* # sectors/track including spares */ } fs_sun; struct { __fs32 fs_state; /* file system state time stamp */ } fs_sunx86; } fs_u1; __fs32 fs_interleave; /* hardware sector interleave */ __fs32 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. */ __fs32 fs_id[2]; /* file system id */ /* sizes determined by number of cylinder groups and their sizes */ __fs32 fs_csaddr; /* blk addr of cyl grp summary area */ __fs32 fs_cssize; /* size of cyl grp summary area */ __fs32 fs_cgsize; /* cylinder group size */ /* these fields are derived from the hardware */ __fs32 fs_ntrak; /* tracks per cylinder */ __fs32 fs_nsect; /* sectors per track */ __fs32 fs_spc; /* sectors per cylinder */ /* this comes from the disk driver partitioning */ __fs32 fs_ncyl; /* cylinders in file system */ /* these fields can be computed from the others */ __fs32 fs_cpg; /* cylinders per group */ __fs32 fs_ipg; /* inodes per cylinder group */ __fs32 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 */ __s8 fs_fmod; /* super block modified flag */ __s8 fs_clean; /* file system is clean flag */ __s8 fs_ronly; /* mounted read-only flag */ __s8 fs_flags; union { struct { __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */ __fs32 fs_cgrotor; /* last cg searched */ __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */ __fs32 fs_maxcluster; __fs32 fs_cpc; /* cyl per cycle in postbl */ __fs16 fs_opostbl[16][8]; /* old rotation block list head */ } fs_u1; struct { __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */ __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */ __fs64 fs_swuid; /* system-wide uid */ __fs32 fs_pad; /* due to alignment of fs_swuid */ __fs32 fs_cgrotor; /* last cg searched */ __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */ __fs32 fs_contigdirs;/*# of contiguously allocated dirs */ __fs32 fs_csp; /* cg summary info buffer for fs_cs */ __fs32 fs_maxcluster; __fs32 fs_active;/* used by snapshots to track fs */ __fs32 fs_old_cpc; /* cyl per cycle in postbl */ __fs32 fs_maxbsize;/*maximum blocking factor permitted */ __fs64 fs_sparecon64[17];/*old rotation block list head */ __fs64 fs_sblockloc; /* byte offset of standard superblock */ struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/ struct ufs_timeval fs_time; /* last time written */ __fs64 fs_size; /* number of blocks in fs */ __fs64 fs_dsize; /* number of data blocks in fs */ __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ __fs64 fs_pendingblocks;/* blocks in process of being freed */ __fs32 fs_pendinginodes;/*inodes in process of being freed */ } fs_u2; } fs_u11; union { struct { __fs32 fs_sparecon[53];/* reserved for future constants */ __fs32 fs_reclaim; __fs32 fs_sparecon2[1]; __fs32 fs_state; /* file system state time stamp */ __fs32 fs_qbmask[2]; /* ~usb_bmask */ __fs32 fs_qfmask[2]; /* ~usb_fmask */ } fs_sun; struct { __fs32 fs_sparecon[53];/* reserved for future constants */ __fs32 fs_reclaim; __fs32 fs_sparecon2[1]; __fs32 fs_npsect; /* # sectors/track including spares */ __fs32 fs_qbmask[2]; /* ~usb_bmask */ __fs32 fs_qfmask[2]; /* ~usb_fmask */ } fs_sunx86; struct { __fs32 fs_sparecon[50];/* reserved for future constants */ __fs32 fs_contigsumsize;/* size of cluster summary array */ __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ __fs32 fs_inodefmt; /* format of on-disk inodes */ __fs32 fs_maxfilesize[2]; /* max representable file size */ __fs32 fs_qbmask[2]; /* ~usb_bmask */ __fs32 fs_qfmask[2]; /* ~usb_fmask */ __fs32 fs_state; /* file system state time stamp */ } fs_44; } fs_u2; __fs32 fs_postblformat; /* format of positional layout tables */ __fs32 fs_nrpos; /* number of rotational positions */ __fs32 fs_postbloff; /* (__s16) rotation block list head */ __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */ __fs32 fs_magic; /* magic number */ __u8 fs_space[1]; /* list of blocks for each rotation */ }; /*struct ufs_super_block*/ #endif