283 lines
9.6 KiB
C
283 lines
9.6 KiB
C
/*
|
|
* Copyright (c) 2000-2001 Christoph Hellwig.
|
|
* Copyright (c) 2016 Krzysztof Blaszkowski
|
|
* 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>
|
|
|
|
/*
|
|
* 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
|
|
|
|
enum vxfs_byte_order {
|
|
VXFS_BO_LE,
|
|
VXFS_BO_BE,
|
|
};
|
|
|
|
typedef __u16 __bitwise __fs16;
|
|
typedef __u32 __bitwise __fs32;
|
|
typedef __u64 __bitwise __fs64;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
__fs32 vs_magic; /* Magic number */
|
|
__fs32 vs_version; /* VxFS version */
|
|
__fs32 vs_ctime; /* create time - secs */
|
|
__fs32 vs_cutime; /* create time - usecs */
|
|
__fs32 __unused1; /* unused */
|
|
__fs32 __unused2; /* unused */
|
|
__fs32 vs_old_logstart; /* obsolete */
|
|
__fs32 vs_old_logend; /* obsolete */
|
|
__fs32 vs_bsize; /* block size */
|
|
__fs32 vs_size; /* number of blocks */
|
|
__fs32 vs_dsize; /* number of data blocks */
|
|
__fs32 vs_old_ninode; /* obsolete */
|
|
__fs32 vs_old_nau; /* obsolete */
|
|
__fs32 __unused3; /* unused */
|
|
__fs32 vs_old_defiextsize; /* obsolete */
|
|
__fs32 vs_old_ilbsize; /* obsolete */
|
|
__fs32 vs_immedlen; /* size of immediate data area */
|
|
__fs32 vs_ndaddr; /* number of direct extentes */
|
|
__fs32 vs_firstau; /* address of first AU */
|
|
__fs32 vs_emap; /* offset of extent map in AU */
|
|
__fs32 vs_imap; /* offset of inode map in AU */
|
|
__fs32 vs_iextop; /* offset of ExtOp. map in AU */
|
|
__fs32 vs_istart; /* offset of inode list in AU */
|
|
__fs32 vs_bstart; /* offset of fdblock in AU */
|
|
__fs32 vs_femap; /* aufirst + emap */
|
|
__fs32 vs_fimap; /* aufirst + imap */
|
|
__fs32 vs_fiextop; /* aufirst + iextop */
|
|
__fs32 vs_fistart; /* aufirst + istart */
|
|
__fs32 vs_fbstart; /* aufirst + bstart */
|
|
__fs32 vs_nindir; /* number of entries in indir */
|
|
__fs32 vs_aulen; /* length of AU in blocks */
|
|
__fs32 vs_auimlen; /* length of imap in blocks */
|
|
__fs32 vs_auemlen; /* length of emap in blocks */
|
|
__fs32 vs_auilen; /* length of ilist in blocks */
|
|
__fs32 vs_aupad; /* length of pad in blocks */
|
|
__fs32 vs_aublocks; /* data blocks in AU */
|
|
__fs32 vs_maxtier; /* log base 2 of aublocks */
|
|
__fs32 vs_inopb; /* number of inodes per blk */
|
|
__fs32 vs_old_inopau; /* obsolete */
|
|
__fs32 vs_old_inopilb; /* obsolete */
|
|
__fs32 vs_old_ndiripau; /* obsolete */
|
|
__fs32 vs_iaddrlen; /* size of indirect addr ext. */
|
|
__fs32 vs_bshift; /* log base 2 of bsize */
|
|
__fs32 vs_inoshift; /* log base 2 of inobp */
|
|
__fs32 vs_bmask; /* ~( bsize - 1 ) */
|
|
__fs32 vs_boffmask; /* bsize - 1 */
|
|
__fs32 vs_old_inomask; /* old_inopilb - 1 */
|
|
__fs32 vs_checksum; /* checksum of V1 data */
|
|
|
|
/*
|
|
* Version 1, writable
|
|
*/
|
|
__fs32 vs_free; /* number of free blocks */
|
|
__fs32 vs_ifree; /* number of free inodes */
|
|
__fs32 vs_efree[VXFS_NEFREE]; /* number of free extents by size */
|
|
__fs32 vs_flags; /* flags ?!? */
|
|
__u8 vs_mod; /* filesystem has been changed */
|
|
__u8 vs_clean; /* clean FS */
|
|
__fs16 __unused4; /* unused */
|
|
__fs32 vs_firstlogid; /* mount time log ID */
|
|
__fs32 vs_wtime; /* last time written - sec */
|
|
__fs32 vs_wutime; /* last time written - usec */
|
|
__u8 vs_fname[6]; /* FS name */
|
|
__u8 vs_fpack[6]; /* FS pack name */
|
|
__fs32 vs_logversion; /* log format version */
|
|
__u32 __unused5; /* unused */
|
|
|
|
/*
|
|
* Version 2, Read-only
|
|
*/
|
|
__fs32 vs_oltext[2]; /* OLT extent and replica */
|
|
__fs32 vs_oltsize; /* OLT extent size */
|
|
__fs32 vs_iauimlen; /* size of inode map */
|
|
__fs32 vs_iausize; /* size of IAU in blocks */
|
|
__fs32 vs_dinosize; /* size of inode in bytes */
|
|
__fs32 vs_old_dniaddr; /* indir levels per inode */
|
|
__fs32 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 */
|
|
enum vxfs_byte_order byte_order;
|
|
};
|
|
|
|
static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a)
|
|
{
|
|
if (sbi->byte_order == VXFS_BO_BE)
|
|
return be16_to_cpu((__force __be16)a);
|
|
else
|
|
return le16_to_cpu((__force __le16)a);
|
|
}
|
|
|
|
static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a)
|
|
{
|
|
if (sbi->byte_order == VXFS_BO_BE)
|
|
return be32_to_cpu((__force __be32)a);
|
|
else
|
|
return le32_to_cpu((__force __le32)a);
|
|
}
|
|
|
|
static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a)
|
|
{
|
|
if (sbi->byte_order == VXFS_BO_BE)
|
|
return be64_to_cpu((__force __be64)a);
|
|
else
|
|
return le64_to_cpu((__force __le64)a);
|
|
}
|
|
|
|
/*
|
|
* 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 superblock.
|
|
*/
|
|
#define VXFS_SBI(sbp) \
|
|
((struct vxfs_sb_info *)(sbp)->s_fs_info)
|
|
|
|
#endif /* _VXFS_SUPER_H_ */
|