PC Welt 2006 November (DVD)

home *** CD-ROM | disk | FTP | other *** search

/ PC Welt 2006 November (DVD) / PCWELT_11_2006.ISO / casper / filesystem.squashfs / usr / src / linux-headers-2.6.17-6 / include / linux / ufs_fs.h < prev next >

Wrap

C/C++ Source or Header | 2006-08-11 | 34.1 KB | 943 lines

/* * 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 /* * 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 */ }; /* * This is the actual superblock, as it is laid out on the disk. */ 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; /* currently unused flag */ 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 */ }; /* * 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_cylinder_group ucg; __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 */ __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 { __s8 fs_fsmnt[212]; __fs32 fs_cgrotor; __fs32 fs_csp[UFS_MAXCSBUFS]; __fs32 fs_maxcluster; __fs32 fs_cpc; __fs16 fs_opostbl[82]; }; struct ufs_super_block_third { __fs16 fs_opostbl[46]; 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; __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 *); /* 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 dentry *, struct buffer_head **); extern int ufs_delete_entry (struct inode *, struct ufs_dir_entry *, struct buffer_head *); extern int ufs_empty_dir (struct inode *); extern struct ufs_dir_entry * ufs_dotdot (struct inode *, struct buffer_head **); extern void ufs_set_link(struct inode *, struct ufs_dir_entry *, struct buffer_head *, struct inode *); /* file.c */ extern struct inode_operations ufs_file_inode_operations; extern const struct file_operations ufs_file_operations; extern 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 u64 ufs_frag_map (struct inode *, sector_t); 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_getfrag (struct inode *, unsigned, int, int *); 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 void ufs_truncate (struct inode *); 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 */