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/*
* 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 <raphael.scarv@gmail.com>
*
* Clean swab support by Fare <fare@tunes.org>
* just hope no one is using NNUUXXI on __?64 structure elements
* 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
*
* 4.4BSD (FreeBSD) support added on February 1st 1998 by
* Niels Kristian Bech Jensen <nkbj@image.dk> partially based
* on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
*
* NeXTstep support added on February 5th 1998 by
* Niels Kristian Bech Jensen <nkbj@image.dk>.
*
* Write support by Daniel Pirkl <daniel.pirkl@email.cz>
*
* HP/UX hfs filesystem support added by
* Martin K. Petersen <mkp@mkp.net>, August 1999
*
* UFS2 (of FreeBSD 5.x) support added by
* Niraj Kumar <niraj17@iitbombay.org> , Jan 2004
*
*/
#ifndef __LINUX_UFS_FS_H
#define __LINUX_UFS_FS_H
#include <inttypes.h>
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
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