/* * 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
/* * 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;
};
staticinline 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);
}
staticinline 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);
}
staticinline 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 */
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.
