2f137e31e0
This driver predates those methods and was trying to be clever allocating it's own private data. Switch to the generic scheme used by other file systems. Based on an earlier patch from Krzysztof Błaszkowski <kb@sysmikro.com.pl>. Signed-off-by: Christoph Hellwig <hch@lst.de>
282 lines
9.5 KiB
C
282 lines
9.5 KiB
C
/*
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* Copyright (c) 2000-2001 Christoph Hellwig.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL").
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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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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