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Diffstat (limited to 'fs/freevxfs/vxfs.h')
| -rw-r--r-- | fs/freevxfs/vxfs.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/fs/freevxfs/vxfs.h b/fs/freevxfs/vxfs.h new file mode 100644 index 00000000..c8a92652 --- /dev/null +++ b/fs/freevxfs/vxfs.h @@ -0,0 +1,263 @@ +/* + * Copyright (c) 2000-2001 Christoph Hellwig. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ +#ifndef _VXFS_SUPER_H_ +#define _VXFS_SUPER_H_ + +/* + * Veritas filesystem driver - superblock structure. + * + * This file contains the definition of the disk and core + * superblocks of the Veritas Filesystem. + */ +#include <linux/types.h> + + +/* + * Data types for use with the VxFS ondisk format. + */ +typedef int32_t vx_daddr_t; +typedef int32_t vx_ino_t; + +/* + * Superblock magic number (vxfs_super->vs_magic). + */ +#define VXFS_SUPER_MAGIC 0xa501FCF5 + +/* + * The root inode. + */ +#define VXFS_ROOT_INO 2 + +/* + * Num of entries in free extent array + */ +#define VXFS_NEFREE 32 + + +/* + * VxFS superblock (disk). + */ +struct vxfs_sb { + /* + * Readonly fields for the version 1 superblock. + * + * Lots of this fields are no more used by version 2 + * and never filesystems. + */ + u_int32_t vs_magic; /* Magic number */ + int32_t vs_version; /* VxFS version */ + u_int32_t vs_ctime; /* create time - secs */ + u_int32_t vs_cutime; /* create time - usecs */ + int32_t __unused1; /* unused */ + int32_t __unused2; /* unused */ + vx_daddr_t vs_old_logstart; /* obsolete */ + vx_daddr_t vs_old_logend; /* obsolete */ + int32_t vs_bsize; /* block size */ + int32_t vs_size; /* number of blocks */ + int32_t vs_dsize; /* number of data blocks */ + u_int32_t vs_old_ninode; /* obsolete */ + int32_t vs_old_nau; /* obsolete */ + int32_t __unused3; /* unused */ + int32_t vs_old_defiextsize; /* obsolete */ + int32_t vs_old_ilbsize; /* obsolete */ + int32_t vs_immedlen; /* size of immediate data area */ + int32_t vs_ndaddr; /* number of direct extentes */ + vx_daddr_t vs_firstau; /* address of first AU */ + vx_daddr_t vs_emap; /* offset of extent map in AU */ + vx_daddr_t vs_imap; /* offset of inode map in AU */ + vx_daddr_t vs_iextop; /* offset of ExtOp. map in AU */ + vx_daddr_t vs_istart; /* offset of inode list in AU */ + vx_daddr_t vs_bstart; /* offset of fdblock in AU */ + vx_daddr_t vs_femap; /* aufirst + emap */ + vx_daddr_t vs_fimap; /* aufirst + imap */ + vx_daddr_t vs_fiextop; /* aufirst + iextop */ + vx_daddr_t vs_fistart; /* aufirst + istart */ + vx_daddr_t vs_fbstart; /* aufirst + bstart */ + int32_t vs_nindir; /* number of entries in indir */ + int32_t vs_aulen; /* length of AU in blocks */ + int32_t vs_auimlen; /* length of imap in blocks */ + int32_t vs_auemlen; /* length of emap in blocks */ + int32_t vs_auilen; /* length of ilist in blocks */ + int32_t vs_aupad; /* length of pad in blocks */ + int32_t vs_aublocks; /* data blocks in AU */ + int32_t vs_maxtier; /* log base 2 of aublocks */ + int32_t vs_inopb; /* number of inodes per blk */ + int32_t vs_old_inopau; /* obsolete */ + int32_t vs_old_inopilb; /* obsolete */ + int32_t vs_old_ndiripau; /* obsolete */ + int32_t vs_iaddrlen; /* size of indirect addr ext. */ + int32_t vs_bshift; /* log base 2 of bsize */ + int32_t vs_inoshift; /* log base 2 of inobp */ + int32_t vs_bmask; /* ~( bsize - 1 ) */ + int32_t vs_boffmask; /* bsize - 1 */ + int32_t vs_old_inomask; /* old_inopilb - 1 */ + int32_t vs_checksum; /* checksum of V1 data */ + + /* + * Version 1, writable + */ + int32_t vs_free; /* number of free blocks */ + int32_t vs_ifree; /* number of free inodes */ + int32_t vs_efree[VXFS_NEFREE]; /* number of free extents by size */ + int32_t vs_flags; /* flags ?!? */ + u_int8_t vs_mod; /* filesystem has been changed */ + u_int8_t vs_clean; /* clean FS */ + u_int16_t __unused4; /* unused */ + u_int32_t vs_firstlogid; /* mount time log ID */ + u_int32_t vs_wtime; /* last time written - sec */ + u_int32_t vs_wutime; /* last time written - usec */ + u_int8_t vs_fname[6]; /* FS name */ + u_int8_t vs_fpack[6]; /* FS pack name */ + int32_t vs_logversion; /* log format version */ + int32_t __unused5; /* unused */ + + /* + * Version 2, Read-only + */ + vx_daddr_t vs_oltext[2]; /* OLT extent and replica */ + int32_t vs_oltsize; /* OLT extent size */ + int32_t vs_iauimlen; /* size of inode map */ + int32_t vs_iausize; /* size of IAU in blocks */ + int32_t vs_dinosize; /* size of inode in bytes */ + int32_t vs_old_dniaddr; /* indir levels per inode */ + int32_t vs_checksum2; /* checksum of V2 RO */ + + /* + * Actually much more... + */ +}; + + +/* + * In core superblock filesystem private data for VxFS. + */ +struct vxfs_sb_info { + struct vxfs_sb *vsi_raw; /* raw (on disk) superblock */ + struct buffer_head *vsi_bp; /* buffer for raw superblock*/ + struct inode *vsi_fship; /* fileset header inode */ + struct inode *vsi_ilist; /* inode list inode */ + struct inode *vsi_stilist; /* structural inode list inode */ + u_long vsi_iext; /* initial inode list */ + ino_t vsi_fshino; /* fileset header inode */ + daddr_t vsi_oltext; /* OLT extent */ + daddr_t vsi_oltsize; /* OLT size */ +}; + + +/* + * File modes. File types above 0xf000 are vxfs internal only, they should + * not be passed back to higher levels of the system. vxfs file types must + * never have one of the regular file type bits set. + */ +enum vxfs_mode { + VXFS_ISUID = 0x00000800, /* setuid */ + VXFS_ISGID = 0x00000400, /* setgid */ + VXFS_ISVTX = 0x00000200, /* sticky bit */ + VXFS_IREAD = 0x00000100, /* read */ + VXFS_IWRITE = 0x00000080, /* write */ + VXFS_IEXEC = 0x00000040, /* exec */ + + VXFS_IFIFO = 0x00001000, /* Named pipe */ + VXFS_IFCHR = 0x00002000, /* Character device */ + VXFS_IFDIR = 0x00004000, /* Directory */ + VXFS_IFNAM = 0x00005000, /* Xenix device ?? */ + VXFS_IFBLK = 0x00006000, /* Block device */ + VXFS_IFREG = 0x00008000, /* Regular file */ + VXFS_IFCMP = 0x00009000, /* Compressed file ?!? */ + VXFS_IFLNK = 0x0000a000, /* Symlink */ + VXFS_IFSOC = 0x0000c000, /* Socket */ + + /* VxFS internal */ + VXFS_IFFSH = 0x10000000, /* Fileset header */ + VXFS_IFILT = 0x20000000, /* Inode list */ + VXFS_IFIAU = 0x30000000, /* Inode allocation unit */ + VXFS_IFCUT = 0x40000000, /* Current usage table */ + VXFS_IFATT = 0x50000000, /* Attr. inode */ + VXFS_IFLCT = 0x60000000, /* Link count table */ + VXFS_IFIAT = 0x70000000, /* Indirect attribute file */ + VXFS_IFEMR = 0x80000000, /* Extent map reorg file */ + VXFS_IFQUO = 0x90000000, /* BSD quota file */ + VXFS_IFPTI = 0xa0000000, /* "Pass through" inode */ + VXFS_IFLAB = 0x11000000, /* Device label file */ + VXFS_IFOLT = 0x12000000, /* OLT file */ + VXFS_IFLOG = 0x13000000, /* Log file */ + VXFS_IFEMP = 0x14000000, /* Extent map file */ + VXFS_IFEAU = 0x15000000, /* Extent AU file */ + VXFS_IFAUS = 0x16000000, /* Extent AU summary file */ + VXFS_IFDEV = 0x17000000, /* Device config file */ + +}; + +#define VXFS_TYPE_MASK 0xfffff000 + +#define VXFS_IS_TYPE(ip,type) (((ip)->vii_mode & VXFS_TYPE_MASK) == (type)) +#define VXFS_ISFIFO(x) VXFS_IS_TYPE((x),VXFS_IFIFO) +#define VXFS_ISCHR(x) VXFS_IS_TYPE((x),VXFS_IFCHR) +#define VXFS_ISDIR(x) VXFS_IS_TYPE((x),VXFS_IFDIR) +#define VXFS_ISNAM(x) VXFS_IS_TYPE((x),VXFS_IFNAM) +#define VXFS_ISBLK(x) VXFS_IS_TYPE((x),VXFS_IFBLK) +#define VXFS_ISLNK(x) VXFS_IS_TYPE((x),VXFS_IFLNK) +#define VXFS_ISREG(x) VXFS_IS_TYPE((x),VXFS_IFREG) +#define VXFS_ISCMP(x) VXFS_IS_TYPE((x),VXFS_IFCMP) +#define VXFS_ISSOC(x) VXFS_IS_TYPE((x),VXFS_IFSOC) + +#define VXFS_ISFSH(x) VXFS_IS_TYPE((x),VXFS_IFFSH) +#define VXFS_ISILT(x) VXFS_IS_TYPE((x),VXFS_IFILT) + +/* + * Inmode organisation types. + */ +enum { + VXFS_ORG_NONE = 0, /* Inode has *no* format ?!? */ + VXFS_ORG_EXT4 = 1, /* Ext4 */ + VXFS_ORG_IMMED = 2, /* All data stored in inode */ + VXFS_ORG_TYPED = 3, /* Typed extents */ +}; + +#define VXFS_IS_ORG(ip,org) ((ip)->vii_orgtype == (org)) +#define VXFS_ISNONE(ip) VXFS_IS_ORG((ip), VXFS_ORG_NONE) +#define VXFS_ISEXT4(ip) VXFS_IS_ORG((ip), VXFS_ORG_EXT4) +#define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED) +#define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED) + + +/* + * Get filesystem private data from VFS inode. + */ +#define VXFS_INO(ip) \ + ((struct vxfs_inode_info *)(ip)->i_private) + +/* + * Get filesystem private data from VFS superblock. + */ +#define VXFS_SBI(sbp) \ + ((struct vxfs_sb_info *)(sbp)->s_fs_info) + +#endif /* _VXFS_SUPER_H_ */ |