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remarkable-linux/include/linux/ufs_fs.h
Evgeniy Dushistov 2189850f42 [PATCH] ufs2: more correct work with time 
This patch corrects work with time in UFS2 case.

1) According to UFS2 disk layout modification/access and so on "time"
   should be hold in two variables one 64bit for seconds and another 32bit for
   nanoseconds,

   at now for some unknown reason we suppose that "inode time" holds in
   three variables 32bit for seconds, 32bit for milliseconds and 32bit for
   nanoseconds.

2) We set amount of nanoseconds in "VFS inode" to 0 during read, instead of
   getting values from "on disk inode"(this should close
   http://bugzilla.kernel.org/show_bug.cgi?id=7991).

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Bjoern Jacke <bjoern@j3e.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:03 -07:00

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/*
* 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>
#ifndef __KERNEL__
typedef __u64 __fs64;
typedef __u32 __fs32;
typedef __u16 __fs16;
#else
#include <asm/div64.h>
typedef __u64 __bitwise __fs64;
typedef __u32 __bitwise __fs32;
typedef __u16 __bitwise __fs16;
#endif
#ifdef __KERNEL__
#include <linux/ufs_fs_i.h>
#include <linux/ufs_fs_sb.h>
#endif
#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 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)
#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)
/* 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
#define UFS_ST_SUNx86 0x00000400
/*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
/* mount options */
#define UFS_MOUNT_ONERROR 0x0000000F
#define UFS_MOUNT_ONERROR_PANIC 0x00000001
#define UFS_MOUNT_ONERROR_LOCK 0x00000002
#define UFS_MOUNT_ONERROR_UMOUNT 0x00000004
#define UFS_MOUNT_ONERROR_REPAIR 0x00000008
#define UFS_MOUNT_UFSTYPE 0x0000FFF0
#define UFS_MOUNT_UFSTYPE_OLD 0x00000010
#define UFS_MOUNT_UFSTYPE_44BSD 0x00000020
#define UFS_MOUNT_UFSTYPE_SUN 0x00000040
#define UFS_MOUNT_UFSTYPE_NEXTSTEP 0x00000080
#define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD 0x00000100
#define UFS_MOUNT_UFSTYPE_OPENSTEP 0x00000200
#define UFS_MOUNT_UFSTYPE_SUNx86 0x00000400
#define UFS_MOUNT_UFSTYPE_HP 0x00000800
#define UFS_MOUNT_UFSTYPE_UFS2 0x00001000
#define ufs_clear_opt(o,opt) o &= ~UFS_MOUNT_##opt
#define ufs_set_opt(o,opt) o |= UFS_MOUNT_##opt
#define ufs_test_opt(o,opt) ((o) & UFS_MOUNT_##opt)
/*
* 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
/*
* Debug code
*/
#ifdef CONFIG_UFS_DEBUG
# define UFSD(f, a...) { \
printk ("UFSD (%s, %d): %s:", \
__FILE__, __LINE__, __FUNCTION__); \
printk (f, ## a); \
}
#else
# define UFSD(f, a...) /**/
#endif
/*
* 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) \
((((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 {
__fs32 fs_link; /* UNUSED */
__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)
/*
* 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 */
};
/*
* 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 {
__fs32 fs_link;
__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];
};
#ifdef __KERNEL__
/* balloc.c */
extern void ufs_free_fragments (struct inode *, u64, unsigned);
extern void ufs_free_blocks (struct inode *, u64, unsigned);
extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
unsigned, int *, struct page *);
/* cylinder.c */
extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
extern void ufs_put_cylinder (struct super_block *, unsigned);
/* dir.c */
extern const struct inode_operations ufs_dir_inode_operations;
extern int ufs_add_link (struct dentry *, struct inode *);
extern ino_t ufs_inode_by_name(struct inode *, struct dentry *);
extern int ufs_make_empty(struct inode *, struct inode *);
extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct dentry *, struct page **);
extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
extern int ufs_empty_dir (struct inode *);
extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
struct page *page, struct inode *inode);
/* file.c */
extern const struct inode_operations ufs_file_inode_operations;
extern const struct file_operations ufs_file_operations;
extern const struct address_space_operations ufs_aops;
/* ialloc.c */
extern void ufs_free_inode (struct inode *inode);
extern struct inode * ufs_new_inode (struct inode *, int);
/* inode.c */
extern void ufs_read_inode (struct inode *);
extern void ufs_put_inode (struct inode *);
extern int ufs_write_inode (struct inode *, int);
extern int ufs_sync_inode (struct inode *);
extern void ufs_delete_inode (struct inode *);
extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
/* namei.c */
extern const struct file_operations ufs_dir_operations;
/* super.c */
extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
/* symlink.c */
extern const struct inode_operations ufs_fast_symlink_inode_operations;
/* truncate.c */
extern int ufs_truncate (struct inode *, loff_t);
static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
{
return sb->s_fs_info;
}
static inline struct ufs_inode_info *UFS_I(struct inode *inode)
{
return container_of(inode, struct ufs_inode_info, vfs_inode);
}
/*
* Give cylinder group number for a file system block.
* Give cylinder group block number for a file system block.
*/
/* #define ufs_dtog(d) ((d) / uspi->s_fpg) */
static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
{
do_div(b, uspi->s_fpg);
return b;
}
/* #define ufs_dtogd(d) ((d) % uspi->s_fpg) */
static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
{
return do_div(b, uspi->s_fpg);
}
#endif /* __KERNEL__ */
#endif /* __LINUX_UFS_FS_H */
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