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 1.16 2002/01/25 14:59:53 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. All advertising materials mentioning features or use of this software
  29  *    must display the following acknowledgement:
  30  *      This product includes software developed by the University of
  31  *      California, Berkeley and its contributors.
  32  * 4. Neither the name of the University nor the names of its contributors
  33  *    may be used to endorse or promote products derived from this software
  34  *    without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  37  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  39  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  40  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  41  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  42  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  44  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  45  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  46  * SUCH DAMAGE.
  47  */
  48
  49 #ifndef _PROTOCOLS_DUMPRESTORE_H_
  50 #define _PROTOCOLS_DUMPRESTORE_H_
  51
  52 #include <config.h>
  53
  54 /*
  55  * TP_BSIZE is the size of file blocks on the dump tapes.
  56  * Note that TP_BSIZE must be a multiple of DEV_BSIZE.
  57  *
  58  * NTREC is the number of TP_BSIZE blocks that are written
  59  * in each tape record. HIGHDENSITYTREC is the number of
  60  * TP_BSIZE blocks that are written in each tape record on
  61  * 6250 BPI or higher density tapes.
  62  *
  63  * TP_NINDIR is the number of indirect pointers in a TS_INODE
  64  * or TS_ADDR record. Note that it must be a power of two.
  65  */
  66 #define TP_BSIZE        1024
  67 #define NTREC           10
  68 #define HIGHDENSITYTREC 32
  69 #define TP_NINDIR       (TP_BSIZE/2)
  70 #define TP_NINOS        (TP_NINDIR / sizeof (int32_t))
  71 #define LBLSIZE         16
  72 #define NAMELEN         64
  73
  74 #define OFS_MAGIC       (int)60011
  75 #define NFS_MAGIC       (int)60012
  76 #define CHECKSUM        (int)84446
  77
  78 typedef u_int32_t       dump_ino_t;
  79
  80 union u_data {
  81         char    s_addrs[TP_NINDIR];     /* 1 => data; 0 => hole in inode */
  82         int32_t s_inos[TP_NINOS];       /* table of first inode on each volume */
  83 } u_data;
  84
  85 union u_spcl {
  86         char dummy[TP_BSIZE];
  87         struct  s_spcl {
  88                 int32_t c_type;             /* record type (see below) */
  89                 int32_t c_date;             /* date of this dump */
  90                 int32_t c_ddate;            /* date of previous dump */
  91                 int32_t c_volume;           /* dump volume number */
  92                 daddr_t c_tapea;            /* logical block of this record */
  93                 dump_ino_t c_inumber;       /* number of inode */
  94                 int32_t c_magic;            /* magic number (see above) */
  95                 int32_t c_checksum;         /* record checksum */
  96 #ifdef  __linux__
  97                 struct  new_bsd_inode c_dinode;
  98 #else
  99                 struct  dinode  c_dinode;   /* ownership and mode of inode */
 100 #endif
 101                 int32_t c_count;            /* number of valid c_addr entries */
 102                 union u_data c_data;        /* see above */
 103                 char    c_label[LBLSIZE];   /* dump label */
 104                 int32_t c_level;            /* level of this dump */
 105                 char    c_filesys[NAMELEN]; /* name of dumpped file system */
 106                 char    c_dev[NAMELEN];     /* name of dumpped device */
 107                 char    c_host[NAMELEN];    /* name of dumpped host */
 108                 int32_t c_flags;            /* additional information */
 109                 int32_t c_firstrec;         /* first record on volume */
 110                 int32_t c_ntrec;            /* blocksize on volume */
 111                 int32_t c_spare[31];        /* reserved for future uses */
 112         } s_spcl;
 113 } u_spcl;
 114 #define spcl u_spcl.s_spcl
 115 #define c_addr c_data.s_addrs
 116 #define c_inos c_data.s_inos
 117
 118 /*
 119  * special record types
 120  */
 121 #define TS_TAPE         1       /* dump tape header */
 122 #define TS_INODE        2       /* beginning of file record */
 123 #define TS_ADDR         4       /* continuation of file record */
 124 #define TS_BITS         3       /* map of inodes on tape */
 125 #define TS_CLRI         6       /* map of inodes deleted since last dump */
 126 #define TS_END          5       /* end of volume marker */
 127
 128 /*
 129  * flag values
 130  */
 131 #define DR_NEWHEADER    0x0001  /* new format tape header */
 132 #define DR_NEWINODEFMT  0x0002  /* new format inodes on tape */
 133 #define DR_COMPRESSED   0x0080  /* dump tape is compressed */
 134 #define DR_INODEINFO    0x0002  /* TS_END header contains c_inos information */
 135
 136
 137 /*
 138  * compression flags for the tapebuf header.
 139  */
 140 #define COMPRESS_ZLIB   0
 141 #define COMPRESS_BZLIB  1
 142
 143 /* used for compressed dump tapes */
 144 struct tapebuf {
 145         unsigned int    compressed:1;
 146         unsigned int    flags:3;
 147         unsigned int    length:28;
 148         char            buf[0]; /* the data */
 149 };
 150
 151 #endif /* !_DUMPRESTORE_H_ */