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tmp_suning_uos_patched/include/linux/ufs_fs.h
Evgeniy Dushistov 10e5dce07e [PATCH] ufs: truncate should allocate block for last byte 
This patch fixes buggy behaviour of UFS
in such kind of scenario:
open(, O_TRUNC...)
ftruncate(, 1024)
ftruncate(, 0)

Such a scenario causes ufs_panic and remount read-only.  This happen
because of according to specification UFS should always allocate block for
last byte, and many parts of our implementation rely on this, but
`ufs_truncate' doesn't care about this.

To make possible return error code and to know about old size, this patch
removes `truncate' from ufs inode_operations and uses `setattr' method to
call ufs_truncate.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-01 09:56:03 -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
typedef __u64 __bitwise __fs64;
typedef __u32 __bitwise __fs32;
typedef __u16 __bitwise __fs16;
#endif
#include <linux/ufs_fs_i.h>
#include <linux/ufs_fs_sb.h>
#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) (ufs_cgimin(ufs_inotocg(x)) + ufs_inotocgoff(x) / uspi->s_inopf)
#define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
/*
* 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)
#define ufs_dtogd(d) ((d) % uspi->s_fpg)
/*
* 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 */
};
/*
* 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. */
struct ufs_timeval ui_atime; /* 32: Last access time. */
struct ufs_timeval ui_mtime; /* 40: Last modified time. */
struct ufs_timeval ui_ctime; /* 48: Last inode change time. */
struct ufs_timeval 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 ufs2_csum_total 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 */
__u32 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 */
};
/*
* 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 */
} 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 *, unsigned, unsigned);
extern void ufs_free_blocks (struct inode *, unsigned, unsigned);
extern unsigned ufs_new_fragments(struct inode *, __fs32 *, unsigned, unsigned,
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 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 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 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);
}
#endif /* __KERNEL__ */
#endif /* __LINUX_UFS_FS_H */
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