258 lines
8.3 KiB
C
258 lines
8.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2000-2001 Christoph Hellwig.
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* Copyright (c) 2016 Krzysztof Blaszkowski
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*/
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#ifndef _VXFS_SUPER_H_
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#define _VXFS_SUPER_H_
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/*
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* Veritas filesystem driver - superblock structure.
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*
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* This file contains the definition of the disk and core
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* superblocks of the Veritas Filesystem.
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*/
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#include <linux/types.h>
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/*
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* Superblock magic number (vxfs_super->vs_magic).
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*/
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#define VXFS_SUPER_MAGIC 0xa501FCF5
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/*
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* The root inode.
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*/
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#define VXFS_ROOT_INO 2
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/*
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* Num of entries in free extent array
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*/
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#define VXFS_NEFREE 32
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enum vxfs_byte_order {
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VXFS_BO_LE,
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VXFS_BO_BE,
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};
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typedef __u16 __bitwise __fs16;
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typedef __u32 __bitwise __fs32;
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typedef __u64 __bitwise __fs64;
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/*
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* VxFS superblock (disk).
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*/
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struct vxfs_sb {
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/*
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* Readonly fields for the version 1 superblock.
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*
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* Lots of this fields are no more used by version 2
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* and never filesystems.
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*/
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__fs32 vs_magic; /* Magic number */
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__fs32 vs_version; /* VxFS version */
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__fs32 vs_ctime; /* create time - secs */
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__fs32 vs_cutime; /* create time - usecs */
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__fs32 __unused1; /* unused */
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__fs32 __unused2; /* unused */
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__fs32 vs_old_logstart; /* obsolete */
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__fs32 vs_old_logend; /* obsolete */
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__fs32 vs_bsize; /* block size */
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__fs32 vs_size; /* number of blocks */
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__fs32 vs_dsize; /* number of data blocks */
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__fs32 vs_old_ninode; /* obsolete */
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__fs32 vs_old_nau; /* obsolete */
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__fs32 __unused3; /* unused */
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__fs32 vs_old_defiextsize; /* obsolete */
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__fs32 vs_old_ilbsize; /* obsolete */
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__fs32 vs_immedlen; /* size of immediate data area */
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__fs32 vs_ndaddr; /* number of direct extentes */
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__fs32 vs_firstau; /* address of first AU */
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__fs32 vs_emap; /* offset of extent map in AU */
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__fs32 vs_imap; /* offset of inode map in AU */
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__fs32 vs_iextop; /* offset of ExtOp. map in AU */
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__fs32 vs_istart; /* offset of inode list in AU */
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__fs32 vs_bstart; /* offset of fdblock in AU */
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__fs32 vs_femap; /* aufirst + emap */
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__fs32 vs_fimap; /* aufirst + imap */
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__fs32 vs_fiextop; /* aufirst + iextop */
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__fs32 vs_fistart; /* aufirst + istart */
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__fs32 vs_fbstart; /* aufirst + bstart */
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__fs32 vs_nindir; /* number of entries in indir */
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__fs32 vs_aulen; /* length of AU in blocks */
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__fs32 vs_auimlen; /* length of imap in blocks */
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__fs32 vs_auemlen; /* length of emap in blocks */
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__fs32 vs_auilen; /* length of ilist in blocks */
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__fs32 vs_aupad; /* length of pad in blocks */
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__fs32 vs_aublocks; /* data blocks in AU */
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__fs32 vs_maxtier; /* log base 2 of aublocks */
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__fs32 vs_inopb; /* number of inodes per blk */
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__fs32 vs_old_inopau; /* obsolete */
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__fs32 vs_old_inopilb; /* obsolete */
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__fs32 vs_old_ndiripau; /* obsolete */
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__fs32 vs_iaddrlen; /* size of indirect addr ext. */
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__fs32 vs_bshift; /* log base 2 of bsize */
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__fs32 vs_inoshift; /* log base 2 of inobp */
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__fs32 vs_bmask; /* ~( bsize - 1 ) */
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__fs32 vs_boffmask; /* bsize - 1 */
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__fs32 vs_old_inomask; /* old_inopilb - 1 */
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__fs32 vs_checksum; /* checksum of V1 data */
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/*
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* Version 1, writable
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*/
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__fs32 vs_free; /* number of free blocks */
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__fs32 vs_ifree; /* number of free inodes */
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__fs32 vs_efree[VXFS_NEFREE]; /* number of free extents by size */
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__fs32 vs_flags; /* flags ?!? */
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__u8 vs_mod; /* filesystem has been changed */
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__u8 vs_clean; /* clean FS */
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__fs16 __unused4; /* unused */
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__fs32 vs_firstlogid; /* mount time log ID */
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__fs32 vs_wtime; /* last time written - sec */
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__fs32 vs_wutime; /* last time written - usec */
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__u8 vs_fname[6]; /* FS name */
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__u8 vs_fpack[6]; /* FS pack name */
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__fs32 vs_logversion; /* log format version */
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__u32 __unused5; /* unused */
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/*
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* Version 2, Read-only
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*/
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__fs32 vs_oltext[2]; /* OLT extent and replica */
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__fs32 vs_oltsize; /* OLT extent size */
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__fs32 vs_iauimlen; /* size of inode map */
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__fs32 vs_iausize; /* size of IAU in blocks */
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__fs32 vs_dinosize; /* size of inode in bytes */
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__fs32 vs_old_dniaddr; /* indir levels per inode */
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__fs32 vs_checksum2; /* checksum of V2 RO */
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/*
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* Actually much more...
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*/
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};
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/*
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* In core superblock filesystem private data for VxFS.
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*/
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struct vxfs_sb_info {
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struct vxfs_sb *vsi_raw; /* raw (on disk) superblock */
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struct buffer_head *vsi_bp; /* buffer for raw superblock*/
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struct inode *vsi_fship; /* fileset header inode */
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struct inode *vsi_ilist; /* inode list inode */
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struct inode *vsi_stilist; /* structural inode list inode */
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u_long vsi_iext; /* initial inode list */
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ino_t vsi_fshino; /* fileset header inode */
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daddr_t vsi_oltext; /* OLT extent */
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daddr_t vsi_oltsize; /* OLT size */
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enum vxfs_byte_order byte_order;
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};
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static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a)
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{
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if (sbi->byte_order == VXFS_BO_BE)
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return be16_to_cpu((__force __be16)a);
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else
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return le16_to_cpu((__force __le16)a);
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}
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static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a)
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{
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if (sbi->byte_order == VXFS_BO_BE)
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return be32_to_cpu((__force __be32)a);
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else
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return le32_to_cpu((__force __le32)a);
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}
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static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a)
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{
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if (sbi->byte_order == VXFS_BO_BE)
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return be64_to_cpu((__force __be64)a);
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else
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return le64_to_cpu((__force __le64)a);
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}
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/*
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* File modes. File types above 0xf000 are vxfs internal only, they should
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* not be passed back to higher levels of the system. vxfs file types must
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* never have one of the regular file type bits set.
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*/
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enum vxfs_mode {
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VXFS_ISUID = 0x00000800, /* setuid */
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VXFS_ISGID = 0x00000400, /* setgid */
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VXFS_ISVTX = 0x00000200, /* sticky bit */
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VXFS_IREAD = 0x00000100, /* read */
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VXFS_IWRITE = 0x00000080, /* write */
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VXFS_IEXEC = 0x00000040, /* exec */
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VXFS_IFIFO = 0x00001000, /* Named pipe */
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VXFS_IFCHR = 0x00002000, /* Character device */
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VXFS_IFDIR = 0x00004000, /* Directory */
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VXFS_IFNAM = 0x00005000, /* Xenix device ?? */
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VXFS_IFBLK = 0x00006000, /* Block device */
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VXFS_IFREG = 0x00008000, /* Regular file */
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VXFS_IFCMP = 0x00009000, /* Compressed file ?!? */
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VXFS_IFLNK = 0x0000a000, /* Symlink */
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VXFS_IFSOC = 0x0000c000, /* Socket */
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/* VxFS internal */
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VXFS_IFFSH = 0x10000000, /* Fileset header */
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VXFS_IFILT = 0x20000000, /* Inode list */
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VXFS_IFIAU = 0x30000000, /* Inode allocation unit */
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VXFS_IFCUT = 0x40000000, /* Current usage table */
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VXFS_IFATT = 0x50000000, /* Attr. inode */
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VXFS_IFLCT = 0x60000000, /* Link count table */
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VXFS_IFIAT = 0x70000000, /* Indirect attribute file */
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VXFS_IFEMR = 0x80000000, /* Extent map reorg file */
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VXFS_IFQUO = 0x90000000, /* BSD quota file */
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VXFS_IFPTI = 0xa0000000, /* "Pass through" inode */
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VXFS_IFLAB = 0x11000000, /* Device label file */
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VXFS_IFOLT = 0x12000000, /* OLT file */
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VXFS_IFLOG = 0x13000000, /* Log file */
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VXFS_IFEMP = 0x14000000, /* Extent map file */
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VXFS_IFEAU = 0x15000000, /* Extent AU file */
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VXFS_IFAUS = 0x16000000, /* Extent AU summary file */
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VXFS_IFDEV = 0x17000000, /* Device config file */
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};
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#define VXFS_TYPE_MASK 0xfffff000
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#define VXFS_IS_TYPE(ip,type) (((ip)->vii_mode & VXFS_TYPE_MASK) == (type))
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#define VXFS_ISFIFO(x) VXFS_IS_TYPE((x),VXFS_IFIFO)
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#define VXFS_ISCHR(x) VXFS_IS_TYPE((x),VXFS_IFCHR)
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#define VXFS_ISDIR(x) VXFS_IS_TYPE((x),VXFS_IFDIR)
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#define VXFS_ISNAM(x) VXFS_IS_TYPE((x),VXFS_IFNAM)
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#define VXFS_ISBLK(x) VXFS_IS_TYPE((x),VXFS_IFBLK)
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#define VXFS_ISLNK(x) VXFS_IS_TYPE((x),VXFS_IFLNK)
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#define VXFS_ISREG(x) VXFS_IS_TYPE((x),VXFS_IFREG)
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#define VXFS_ISCMP(x) VXFS_IS_TYPE((x),VXFS_IFCMP)
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#define VXFS_ISSOC(x) VXFS_IS_TYPE((x),VXFS_IFSOC)
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#define VXFS_ISFSH(x) VXFS_IS_TYPE((x),VXFS_IFFSH)
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#define VXFS_ISILT(x) VXFS_IS_TYPE((x),VXFS_IFILT)
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/*
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* Inmode organisation types.
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*/
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enum {
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VXFS_ORG_NONE = 0, /* Inode has *no* format ?!? */
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VXFS_ORG_EXT4 = 1, /* Ext4 */
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VXFS_ORG_IMMED = 2, /* All data stored in inode */
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VXFS_ORG_TYPED = 3, /* Typed extents */
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};
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#define VXFS_IS_ORG(ip,org) ((ip)->vii_orgtype == (org))
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#define VXFS_ISNONE(ip) VXFS_IS_ORG((ip), VXFS_ORG_NONE)
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#define VXFS_ISEXT4(ip) VXFS_IS_ORG((ip), VXFS_ORG_EXT4)
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#define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
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#define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED)
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/*
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* Get filesystem private data from VFS superblock.
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*/
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#define VXFS_SBI(sbp) \
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((struct vxfs_sb_info *)(sbp)->s_fs_info)
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#endif /* _VXFS_SUPER_H_ */
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