| /* |
| * 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 */ |
| }; |
| |
| /* |
| * 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_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 */ |
| __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 *, 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 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 */ |