compat/include/protocols/dumprestore.h

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <stelian@popies.net>, 1999-2000
   6  *      Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
   7  *
   8  *      $Id: dumprestore.h,v 1.19 2003/03/31 09:42:57 stelian Exp $
   9  */
  10
  11 /*
  12  * Copyright (c) 1980, 1993
  13  *      The Regents of the University of California.  All rights reserved.
  14  * (c) UNIX System Laboratories, Inc.
  15  * All or some portions of this file are derived from material licensed
  16  * to the University of California by American Telephone and Telegraph
  17  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  18  * the permission of UNIX System Laboratories, Inc.
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  * 1. Redistributions of source code must retain the above copyright
  24  *    notice, this list of conditions and the following disclaimer.
  25  * 2. Redistributions in binary form must reproduce the above copyright
  26  *    notice, this list of conditions and the following disclaimer in the
  27  *    documentation and/or other materials provided with the distribution.
  28  * 3. Neither the name of the University nor the names of its contributors
  29  *    may be used to endorse or promote products derived from this software
  30  *    without specific prior written permission.
  31  *
  32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  42  * SUCH DAMAGE.
  43  */
  44
  45 #ifndef _PROTOCOLS_DUMPRESTORE_H_
  46 #define _PROTOCOLS_DUMPRESTORE_H_
  47
  48 #include <config.h>
  49
  50 /*
  51  * TP_BSIZE is the size of file blocks on the dump tapes.
  52  * Note that TP_BSIZE must be a multiple of DEV_BSIZE.
  53  *
  54  * NTREC is the number of TP_BSIZE blocks that are written
  55  * in each tape record. HIGHDENSITYTREC is the number of
  56  * TP_BSIZE blocks that are written in each tape record on
  57  * 6250 BPI or higher density tapes.
  58  *
  59  * TP_NINDIR is the number of indirect pointers in a TS_INODE
  60  * or TS_ADDR record. Note that it must be a power of two.
  61  */
  62 #define TP_BSIZE        1024
  63 #define NTREC           10
  64 #define HIGHDENSITYTREC 32
  65 #define TP_NINDIR       (TP_BSIZE/2)
  66 #define TP_NINOS        (TP_NINDIR / sizeof (int32_t))
  67 #define LBLSIZE         16
  68 #define NAMELEN         64
  69
  70 #define OFS_MAGIC       (int)60011
  71 #define NFS_MAGIC       (int)60012
  72 #define CHECKSUM        (int)84446
  73
  74 typedef u_int32_t       dump_ino_t;
  75
  76 union u_data {
  77         char    s_addrs[TP_NINDIR];     /* 1 => data; 0 => hole in inode */
  78         int32_t s_inos[TP_NINOS];       /* table of first inode on each volume */
  79 } u_data;
  80
  81 union u_spcl {
  82         char dummy[TP_BSIZE];
  83         struct  s_spcl {
  84                 int32_t c_type;             /* record type (see below) */
  85                 int32_t c_date;             /* date of this dump */
  86                 int32_t c_ddate;            /* date of previous dump */
  87                 int32_t c_volume;           /* dump volume number */
  88                 daddr_t c_tapea;            /* logical block of this record */
  89                 dump_ino_t c_inumber;       /* number of inode */
  90                 int32_t c_magic;            /* magic number (see above) */
  91                 int32_t c_checksum;         /* record checksum */
  92 #ifdef  __linux__
  93                 struct  new_bsd_inode c_dinode;
  94 #else
  95                 struct  dinode  c_dinode;   /* ownership and mode of inode */
  96 #endif
  97                 int32_t c_count;            /* number of valid c_addr entries */
  98                 union u_data c_data;        /* see above */
  99                 char    c_label[LBLSIZE];   /* dump label */
 100                 int32_t c_level;            /* level of this dump */
 101                 char    c_filesys[NAMELEN]; /* name of dumpped file system */
 102                 char    c_dev[NAMELEN];     /* name of dumpped device */
 103                 char    c_host[NAMELEN];    /* name of dumpped host */
 104                 int32_t c_flags;            /* additional information */
 105                 int32_t c_firstrec;         /* first record on volume */
 106                 int32_t c_ntrec;            /* blocksize on volume */
 107                 int32_t c_spare[31];        /* reserved for future uses */
 108         } s_spcl;
 109 } u_spcl;
 110 #define spcl u_spcl.s_spcl
 111 #define c_addr c_data.s_addrs
 112 #define c_inos c_data.s_inos
 113
 114 /*
 115  * special record types
 116  */
 117 #define TS_TAPE         1       /* dump tape header */
 118 #define TS_INODE        2       /* beginning of file record */
 119 #define TS_ADDR         4       /* continuation of file record */
 120 #define TS_BITS         3       /* map of inodes on tape */
 121 #define TS_CLRI         6       /* map of inodes deleted since last dump */
 122 #define TS_END          5       /* end of volume marker */
 123
 124 /*
 125  * flag values
 126  */
 127 #define DR_NEWHEADER    0x0001  /* new format tape header */
 128 #define DR_NEWINODEFMT  0x0002  /* new format inodes on tape */
 129 #define DR_COMPRESSED   0x0080  /* dump tape is compressed */
 130 #define DR_METAONLY     0x0100  /* only the metadata of the inode has
 131                                    been dumped */
 132 #define DR_INODEINFO    0x0002  /* TS_END header contains c_inos information */
 133
 134
 135 /*
 136  * compression flags for the tapebuf header.
 137  */
 138 #define COMPRESS_ZLIB   0
 139 #define COMPRESS_BZLIB  1
 140 #define COMPRESS_LZO    2
 141
 142 /* used for compressed dump tapes */
 143 struct tapebuf {
 144         unsigned int    compressed:1;
 145         unsigned int    flags:3;
 146         unsigned int    length:28;
 147         char            buf[0]; /* the data */
 148 };
 149
 150 #endif /* !_DUMPRESTORE_H_ */