--- /dev/null
+/*
+ * 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
+ *
+ * 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 <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/fs.h>
+#include <linux/workqueue.h>
+
+#include <asm/div64.h>
+typedef __u64 __bitwise __fs64;
+typedef __u32 __bitwise __fs32;
+typedef __u16 __bitwise __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 }
+
+
+/* HP specific MAGIC values */
+
+#define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */
+#define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */
+
+#define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */
+#define UFS_CIGAM_SEC 0x95216100
+
+#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */
+#define UFS_CIGAM_FEA 0x12561900
+
+#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */
+#define UFS_CIGAM_4GB 0x94192305
+
+/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
+#define UFS_FSF_LFN 0x00000001 /* long file names */
+#define UFS_FSF_B1 0x00000002 /* B1 security */
+#define UFS_FSF_LFS 0x00000002 /* large files */
+#define UFS_FSF_LUID 0x00000004 /* large UIDs */
+
+/* End of HP stuff */
+
+
+#define UFS_BSIZE 8192
+#define UFS_MINBSIZE 4096
+#define UFS_FSIZE 1024
+#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)
+
+#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_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
+#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
+#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
+#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
+
+#define UFS_ROOTINO 2
+#define UFS_FIRST_INO (UFS_ROOTINO + 1)
+
+#define UFS_USEEFT ((__u16)65535)
+
+/* fs_clean values */
+#define UFS_FSOK 0x7c269d38
+#define UFS_FSACTIVE ((__s8)0x00)
+#define UFS_FSCLEAN ((__s8)0x01)
+#define UFS_FSSTABLE ((__s8)0x02)
+#define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */
+#define UFS_FSBAD ((__s8)0xff)
+
+/* Solaris-specific fs_clean values */
+#define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */
+#define UFS_FSLOG ((__s8)0xfd) /* logging fs */
+#define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */
+
+/* From here to next blank line, s_flags for ufs_sb_info */
+/* directory entry encoding */
+#define UFS_DE_MASK 0x00000010 /* mask for the following */
+#define UFS_DE_OLD 0x00000000
+#define UFS_DE_44BSD 0x00000010
+/* uid encoding */
+#define UFS_UID_MASK 0x00000060 /* mask for the following */
+#define UFS_UID_OLD 0x00000000
+#define UFS_UID_44BSD 0x00000020
+#define UFS_UID_EFT 0x00000040
+/* superblock state encoding */
+#define UFS_ST_MASK 0x00000700 /* mask for the following */
+#define UFS_ST_OLD 0x00000000
+#define UFS_ST_44BSD 0x00000100
+#define UFS_ST_SUN 0x00000200 /* Solaris */
+#define UFS_ST_SUNOS 0x00000300
+#define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */
+/*cylinder group encoding */
+#define UFS_CG_MASK 0x00003000 /* mask for the following */
+#define UFS_CG_OLD 0x00000000
+#define UFS_CG_44BSD 0x00002000
+#define UFS_CG_SUN 0x00001000
+/* filesystem type encoding */
+#define UFS_TYPE_MASK 0x00010000 /* mask for the following */
+#define UFS_TYPE_UFS1 0x00000000
+#define UFS_TYPE_UFS2 0x00010000
+
+
+/* fs_inodefmt options */
+#define UFS_42INODEFMT -1
+#define UFS_44INODEFMT 2
+
+/*
+ * MINFREE gives the minimum acceptable percentage of file system
+ * blocks which may be free. If the freelist drops below this level
+ * only the superuser may continue to allocate blocks. This may
+ * be set to 0 if no reserve of free blocks is deemed necessary,
+ * however throughput drops by fifty percent if the file system
+ * is run at between 95% and 100% full; thus the minimum default
+ * value of fs_minfree is 5%. However, to get good clustering
+ * performance, 10% is a better choice. hence we use 10% as our
+ * default value. With 10% free space, fragmentation is not a
+ * problem, so we choose to optimize for time.
+ */
+#define UFS_MINFREE 5
+#define UFS_DEFAULTOPT UFS_OPTTIME
+
+/*
+ * Turn file system block numbers into disk block addresses.
+ * This maps file system blocks to device size blocks.
+ */
+#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb)
+#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb)
+
+/*
+ * Cylinder group macros to locate things in cylinder groups.
+ * They calc file system addresses of cylinder group data structures.
+ */
+#define ufs_cgbase(c) (uspi->s_fpg * (c))
+#define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \
+ (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
+#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */
+#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */
+#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */
+#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */
+
+/*
+ * Macros for handling inode numbers:
+ * inode number to file system block offset.
+ * inode number to cylinder group number.
+ * inode number to file system block address.
+ */
+#define ufs_inotocg(x) ((x) / uspi->s_ipg)
+#define ufs_inotocgoff(x) ((x) % uspi->s_ipg)
+#define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
+#define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
+
+/*
+ * Compute the cylinder and rotational position of a cyl block addr.
+ */
+#define ufs_cbtocylno(bno) \
+ ((bno) * uspi->s_nspf / uspi->s_spc)
+#define ufs_cbtorpos(bno) \
+ ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \
+ (((((bno) * uspi->s_nspf % uspi->s_spc) % \
+ uspi->s_nsect) * \
+ uspi->s_nrpos) / uspi->s_nsect) \
+ : \
+ ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
+ * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
+ % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
+ * uspi->s_nrpos) / uspi->s_npsect))
+
+/*
+ * The following macros optimize certain frequently calculated
+ * quantities by using shifts and masks in place of divisions
+ * modulos and multiplications.
+ */
+#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask)
+#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask)
+#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift)
+#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift)
+#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift)
+#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask)
+#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask)
+#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift)
+#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift)
+#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask)
+#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask)
+
+#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 */
+};
+
+/*
+ * File system flags
+ */
+#define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */
+#define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */
+#define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */
+#define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */
+#define UFS_ACLS 0x10 /* file system has ACLs enabled */
+#define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */
+#define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */
+
+#if 0
+/*
+ * This is the actual superblock, as it is laid out on the disk.
+ * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
+ * it may occupy several blocks, use
+ * struct ufs_super_block_(first,second,third) instead.
+ */
+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 */
+};
+#endif/*struct ufs_super_block*/
+
+/*
+ * Preference for optimization.
+ */
+#define UFS_OPTTIME 0 /* minimize allocation time */
+#define UFS_OPTSPACE 1 /* minimize disk fragmentation */
+
+/*
+ * Rotational layout table format types
+ */
+#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
+#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
+
+/*
+ * Convert cylinder group to base address of its global summary info.
+ */
+#define fs_cs(indx) s_csp[(indx)]
+
+/*
+ * Cylinder group block for a file system.
+ *
+ * Writable fields in the cylinder group are protected by the associated
+ * super block lock fs->fs_lock.
+ */
+#define CG_MAGIC 0x090255
+#define ufs_cg_chkmagic(sb, ucg) \
+ (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
+/*
+ * Macros for access to old cylinder group array structures
+ */
+#define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot)
+#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno])
+#define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused)
+#define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
+#define ufs_ocg_chkmagic(sb, ucg) \
+ (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC)
+
+/*
+ * size of this structure is 172 B
+ */
+struct ufs_cylinder_group {
+ __fs32 cg_link; /* linked list of cyl groups */
+ __fs32 cg_magic; /* magic number */
+ __fs32 cg_time; /* time last written */
+ __fs32 cg_cgx; /* we are the cgx'th cylinder group */
+ __fs16 cg_ncyl; /* number of cyl's this cg */
+ __fs16 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_ndblk; /* number of data blocks this cg */
+ struct ufs_csum cg_cs; /* cylinder summary information */
+ __fs32 cg_rotor; /* position of last used block */
+ __fs32 cg_frotor; /* position of last used frag */
+ __fs32 cg_irotor; /* position of last used inode */
+ __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */
+ __fs32 cg_btotoff; /* (__u32) block totals per cylinder */
+ __fs32 cg_boff; /* (short) free block positions */
+ __fs32 cg_iusedoff; /* (char) used inode map */
+ __fs32 cg_freeoff; /* (u_char) free block map */
+ __fs32 cg_nextfreeoff; /* (u_char) next available space */
+ union {
+ struct {
+ __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */
+ __fs32 cg_clusteroff; /* (u_int8) free cluster map */
+ __fs32 cg_nclusterblks; /* number of clusters this cg */
+ __fs32 cg_sparecon[13]; /* reserved for future use */
+ } cg_44;
+ struct {
+ __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */
+ __fs32 cg_clusteroff; /* (u_int8) free cluster map */
+ __fs32 cg_nclusterblks;/* number of clusters this cg */
+ __fs32 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_initediblk; /* last initialized inode */
+ __fs32 cg_sparecon32[3];/* reserved for future use */
+ __fs64 cg_time; /* time last written */
+ __fs64 cg_sparecon[3]; /* reserved for future use */
+ } cg_u2;
+ __fs32 cg_sparecon[16]; /* reserved for future use */
+ } cg_u;
+ __u8 cg_space[1]; /* space for cylinder group maps */
+/* actually longer */
+};
+
+/* Historic Cylinder group info */
+struct ufs_old_cylinder_group {
+ __fs32 cg_link; /* linked list of cyl groups */
+ __fs32 cg_rlink; /* for incore cyl groups */
+ __fs32 cg_time; /* time last written */
+ __fs32 cg_cgx; /* we are the cgx'th cylinder group */
+ __fs16 cg_ncyl; /* number of cyl's this cg */
+ __fs16 cg_niblk; /* number of inode blocks this cg */
+ __fs32 cg_ndblk; /* number of data blocks this cg */
+ struct ufs_csum cg_cs; /* cylinder summary information */
+ __fs32 cg_rotor; /* position of last used block */
+ __fs32 cg_frotor; /* position of last used frag */
+ __fs32 cg_irotor; /* position of last used inode */
+ __fs32 cg_frsum[8]; /* counts of available frags */
+ __fs32 cg_btot[32]; /* block totals per cylinder */
+ __fs16 cg_b[32][8]; /* positions of free blocks */
+ __u8 cg_iused[256]; /* used inode map */
+ __fs32 cg_magic; /* magic number */
+ __u8 cg_free[1]; /* free block map */
+/* actually longer */
+};
+
+/*
+ * structure of an on-disk inode
+ */
+struct ufs_inode {
+ __fs16 ui_mode; /* 0x0 */
+ __fs16 ui_nlink; /* 0x2 */
+ union {
+ struct {
+ __fs16 ui_suid; /* 0x4 */
+ __fs16 ui_sgid; /* 0x6 */
+ } oldids;
+ __fs32 ui_inumber; /* 0x4 lsf: inode number */
+ __fs32 ui_author; /* 0x4 GNU HURD: author */
+ } ui_u1;
+ __fs64 ui_size; /* 0x8 */
+ struct ufs_timeval ui_atime; /* 0x10 access */
+ struct ufs_timeval ui_mtime; /* 0x18 modification */
+ struct ufs_timeval ui_ctime; /* 0x20 creation */
+ union {
+ struct {
+ __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */
+ __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
+ } ui_addr;
+ __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
+ } ui_u2;
+ __fs32 ui_flags; /* 0x64 immutable, append-only... */
+ __fs32 ui_blocks; /* 0x68 blocks in use */
+ __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */
+ union {
+ struct {
+ __fs32 ui_shadow; /* 0x70 shadow inode with security data */
+ __fs32 ui_uid; /* 0x74 long EFT version of uid */
+ __fs32 ui_gid; /* 0x78 long EFT version of gid */
+ __fs32 ui_oeftflag; /* 0x7c reserved */
+ } ui_sun;
+ struct {
+ __fs32 ui_uid; /* 0x70 File owner */
+ __fs32 ui_gid; /* 0x74 File group */
+ __fs32 ui_spare[2]; /* 0x78 reserved */
+ } ui_44;
+ struct {
+ __fs32 ui_uid; /* 0x70 */
+ __fs32 ui_gid; /* 0x74 */
+ __fs16 ui_modeh; /* 0x78 mode high bits */
+ __fs16 ui_spare; /* 0x7A unused */
+ __fs32 ui_trans; /* 0x7c filesystem translator */
+ } ui_hurd;
+ } ui_u3;
+};
+
+#define UFS_NXADDR 2 /* External addresses in inode. */
+struct ufs2_inode {
+ __fs16 ui_mode; /* 0: IFMT, permissions; see below. */
+ __fs16 ui_nlink; /* 2: File link count. */
+ __fs32 ui_uid; /* 4: File owner. */
+ __fs32 ui_gid; /* 8: File group. */
+ __fs32 ui_blksize; /* 12: Inode blocksize. */
+ __fs64 ui_size; /* 16: File byte count. */
+ __fs64 ui_blocks; /* 24: Bytes actually held. */
+ __fs64 ui_atime; /* 32: Last access time. */
+ __fs64 ui_mtime; /* 40: Last modified time. */
+ __fs64 ui_ctime; /* 48: Last inode change time. */
+ __fs64 ui_birthtime; /* 56: Inode creation time. */
+ __fs32 ui_mtimensec; /* 64: Last modified time. */
+ __fs32 ui_atimensec; /* 68: Last access time. */
+ __fs32 ui_ctimensec; /* 72: Last inode change time. */
+ __fs32 ui_birthnsec; /* 76: Inode creation time. */
+ __fs32 ui_gen; /* 80: Generation number. */
+ __fs32 ui_kernflags; /* 84: Kernel flags. */
+ __fs32 ui_flags; /* 88: Status flags (chflags). */
+ __fs32 ui_extsize; /* 92: External attributes block. */
+ __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */
+ union {
+ struct {
+ __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
+ __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
+ } ui_addr;
+ __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
+ } ui_u2;
+ __fs64 ui_spare[3]; /* 232: Reserved; currently unused */
+};
+
+
+/* FreeBSD has these in sys/stat.h */
+/* ui_flags that can be set by a file owner */
+#define UFS_UF_SETTABLE 0x0000ffff
+#define UFS_UF_NODUMP 0x00000001 /* do not dump */
+#define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */
+#define UFS_UF_APPEND 0x00000004 /* append-only */
+#define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */
+#define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */
+/* ui_flags that only root can set */
+#define UFS_SF_SETTABLE 0xffff0000
+#define UFS_SF_ARCHIVED 0x00010000 /* archived */
+#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */
+#define UFS_SF_APPEND 0x00040000 /* append-only */
+#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */
+
+/*
+ * This structure is used for reading disk structures larger
+ * than the size of fragment.
+ */
+struct ufs_buffer_head {
+ __u64 fragment; /* first fragment */
+ __u64 count; /* number of fragments */
+ struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */
+};
+
+struct ufs_cg_private_info {
+ struct ufs_buffer_head c_ubh;
+ __u32 c_cgx; /* number of cylidner group */
+ __u16 c_ncyl; /* number of cyl's this cg */
+ __u16 c_niblk; /* number of inode blocks this cg */
+ __u32 c_ndblk; /* number of data blocks this cg */
+ __u32 c_rotor; /* position of last used block */
+ __u32 c_frotor; /* position of last used frag */
+ __u32 c_irotor; /* position of last used inode */
+ __u32 c_btotoff; /* (__u32) block totals per cylinder */
+ __u32 c_boff; /* (short) free block positions */
+ __u32 c_iusedoff; /* (char) used inode map */
+ __u32 c_freeoff; /* (u_char) free block map */
+ __u32 c_nextfreeoff; /* (u_char) next available space */
+ __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */
+ __u32 c_clusteroff; /* (u_int8) free cluster map */
+ __u32 c_nclusterblks; /* number of clusters this cg */
+};
+
+
+struct ufs_sb_private_info {
+ struct ufs_buffer_head s_ubh; /* buffer containing super block */
+ struct ufs_csum_core cs_total;
+ __u32 s_sblkno; /* offset of super-blocks in filesys */
+ __u32 s_cblkno; /* offset of cg-block in filesys */
+ __u32 s_iblkno; /* offset of inode-blocks in filesys */
+ __u32 s_dblkno; /* offset of first data after cg */
+ __u32 s_cgoffset; /* cylinder group offset in cylinder */
+ __u32 s_cgmask; /* used to calc mod fs_ntrak */
+ __u32 s_size; /* number of blocks (fragments) in fs */
+ __u32 s_dsize; /* number of data blocks in fs */
+ __u64 s_u2_size; /* ufs2: number of blocks (fragments) in fs */
+ __u64 s_u2_dsize; /*ufs2: number of data blocks in fs */
+ __u32 s_ncg; /* number of cylinder groups */
+ __u32 s_bsize; /* size of basic blocks */
+ __u32 s_fsize; /* size of fragments */
+ __u32 s_fpb; /* fragments per block */
+ __u32 s_minfree; /* minimum percentage of free blocks */
+ __u32 s_bmask; /* `blkoff'' calc of blk offsets */
+ __u32 s_fmask; /* s_fsize mask */
+ __u32 s_bshift; /* `lblkno'' calc of logical blkno */
+ __u32 s_fshift; /* s_fsize shift */
+ __u32 s_fpbshift; /* fragments per block shift */
+ __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */
+ __u32 s_sbsize; /* actual size of super block */
+ __u32 s_csmask; /* csum block offset */
+ __u32 s_csshift; /* csum block number */
+ __u32 s_nindir; /* value of NINDIR */
+ __u32 s_inopb; /* value of INOPB */
+ __u32 s_nspf; /* value of NSPF */
+ __u32 s_npsect; /* # sectors/track including spares */
+ __u32 s_interleave; /* hardware sector interleave */
+ __u32 s_trackskew; /* sector 0 skew, per track */
+ __u64 s_csaddr; /* blk addr of cyl grp summary area */
+ __u32 s_cssize; /* size of cyl grp summary area */
+ __u32 s_cgsize; /* cylinder group size */
+ __u32 s_ntrak; /* tracks per cylinder */
+ __u32 s_nsect; /* sectors per track */
+ __u32 s_spc; /* sectors per cylinder */
+ __u32 s_ipg; /* inodes per cylinder group */
+ __u32 s_fpg; /* fragments per group */
+ __u32 s_cpc; /* cyl per cycle in postbl */
+ __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */
+ __s64 s_qbmask; /* ~usb_bmask */
+ __s64 s_qfmask; /* ~usb_fmask */
+ __s32 s_postblformat; /* format of positional layout tables */
+ __s32 s_nrpos; /* number of rotational positions */
+ __s32 s_postbloff; /* (__s16) rotation block list head */
+ __s32 s_rotbloff; /* (__u8) blocks for each rotation */
+
+ __u32 s_fpbmask; /* fragments per block mask */
+ __u32 s_apb; /* address per block */
+ __u32 s_2apb; /* address per block^2 */
+ __u32 s_3apb; /* address per block^3 */
+ __u32 s_apbmask; /* address per block mask */
+ __u32 s_apbshift; /* address per block shift */
+ __u32 s_2apbshift; /* address per block shift * 2 */
+ __u32 s_3apbshift; /* address per block shift * 3 */
+ __u32 s_nspfshift; /* number of sector per fragment shift */
+ __u32 s_nspb; /* number of sector per block */
+ __u32 s_inopf; /* inodes per fragment */
+ __u32 s_sbbase; /* offset of NeXTstep superblock */
+ __u32 s_bpf; /* bits per fragment */
+ __u32 s_bpfshift; /* bits per fragment shift*/
+ __u32 s_bpfmask; /* bits per fragment mask */
+
+ __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */
+ __s32 fs_magic; /* filesystem magic */
+ unsigned int s_dirblksize;
+};
+
+/*
+ * Sizes of this structures are:
+ * ufs_super_block_first 512
+ * ufs_super_block_second 512
+ * ufs_super_block_third 356
+ */
+struct ufs_super_block_first {
+ union {
+ struct {
+ __fs32 fs_link; /* UNUSED */
+ } fs_42;
+ struct {
+ __fs32 fs_state; /* file system state flag */
+ } fs_sun;
+ } fs_u0;
+ __fs32 fs_rlink;
+ __fs32 fs_sblkno;
+ __fs32 fs_cblkno;
+ __fs32 fs_iblkno;
+ __fs32 fs_dblkno;
+ __fs32 fs_cgoffset;
+ __fs32 fs_cgmask;
+ __fs32 fs_time;
+ __fs32 fs_size;
+ __fs32 fs_dsize;
+ __fs32 fs_ncg;
+ __fs32 fs_bsize;
+ __fs32 fs_fsize;
+ __fs32 fs_frag;
+ __fs32 fs_minfree;
+ __fs32 fs_rotdelay;
+ __fs32 fs_rps;
+ __fs32 fs_bmask;
+ __fs32 fs_fmask;
+ __fs32 fs_bshift;
+ __fs32 fs_fshift;
+ __fs32 fs_maxcontig;
+ __fs32 fs_maxbpg;
+ __fs32 fs_fragshift;
+ __fs32 fs_fsbtodb;
+ __fs32 fs_sbsize;
+ __fs32 fs_csmask;
+ __fs32 fs_csshift;
+ __fs32 fs_nindir;
+ __fs32 fs_inopb;
+ __fs32 fs_nspf;
+ __fs32 fs_optim;
+ union {
+ struct {
+ __fs32 fs_npsect;
+ } fs_sun;
+ struct {
+ __fs32 fs_state;
+ } fs_sunx86;
+ } fs_u1;
+ __fs32 fs_interleave;
+ __fs32 fs_trackskew;
+ __fs32 fs_id[2];
+ __fs32 fs_csaddr;
+ __fs32 fs_cssize;
+ __fs32 fs_cgsize;
+ __fs32 fs_ntrak;
+ __fs32 fs_nsect;
+ __fs32 fs_spc;
+ __fs32 fs_ncyl;
+ __fs32 fs_cpg;
+ __fs32 fs_ipg;
+ __fs32 fs_fpg;
+ struct ufs_csum fs_cstotal;
+ __s8 fs_fmod;
+ __s8 fs_clean;
+ __s8 fs_ronly;
+ __s8 fs_flags;
+ __s8 fs_fsmnt[UFS_MAXMNTLEN - 212];
+
+};
+
+struct ufs_super_block_second {
+ union {
+ struct {
+ __s8 fs_fsmnt[212];
+ __fs32 fs_cgrotor;
+ __fs32 fs_csp[UFS_MAXCSBUFS];
+ __fs32 fs_maxcluster;
+ __fs32 fs_cpc;
+ __fs16 fs_opostbl[82];
+ } fs_u1;
+ struct {
+ __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
+ __u8 fs_volname[UFS2_MAXVOLLEN];
+ __fs64 fs_swuid;
+ __fs32 fs_pad;
+ __fs32 fs_cgrotor;
+ __fs32 fs_ocsp[UFS2_NOCSPTRS];
+ __fs32 fs_contigdirs;
+ __fs32 fs_csp;
+ __fs32 fs_maxcluster;
+ __fs32 fs_active;
+ __fs32 fs_old_cpc;
+ __fs32 fs_maxbsize;
+ __fs64 fs_sparecon64[17];
+ __fs64 fs_sblockloc;
+ __fs64 cs_ndir;
+ __fs64 cs_nbfree;
+ } fs_u2;
+ } fs_un;
+};
+
+struct ufs_super_block_third {
+ union {
+ struct {
+ __fs16 fs_opostbl[46];
+ } fs_u1;
+ struct {
+ __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_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 */
+ } __attribute__ ((packed)) fs_u2;
+ } fs_un1;
+ 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_un2;
+ __fs32 fs_postblformat;
+ __fs32 fs_nrpos;
+ __fs32 fs_postbloff;
+ __fs32 fs_rotbloff;
+ __fs32 fs_magic;
+ __u8 fs_space[1];
+};
+
+#endif /* __LINUX_UFS_FS_H */
Code Review / kvmfornfv.git / blobdiff