src/vol/voldefs.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * System:              VICE-TWO
  12  * Module:              voldefs.h
  13  * Institution: The Information Technology Center, Carnegie-Mellon University
  14  */
  15
  16 /* If you add volume types here, be sure to check the definition of
  17  * volumeWriteable in volume.h
  18  */
  19
  20 #define readwriteVolume         RWVOL
  21 #define readonlyVolume          ROVOL
  22 #define backupVolume            BACKVOL
  23 #define rwreplicaVolume         RWREPL
  24
  25 #define RWVOL                   0
  26 #define ROVOL                   1
  27 #define BACKVOL                 2
  28 #define RWREPL                  3
  29
  30 #define VOLMAXTYPES             4   /* current max number of types */
  31
  32 /* the maximum number of volumes in a volume group that we can handle */
  33
  34 #define VOL_VG_MAX_VOLS 20
  35
  36 /* How many times to retry if we raced the fileserver restarting, when trying
  37  * to check out or lock a volume. */
  38
  39 #define VOL_MAX_CHECKOUT_RETRIES 10
  40
  41 /* maximum number of vice partitions */
  42 #define VOLMAXPARTS     255
  43
  44 #define VFORMATDIGITS 10
  45
  46 /*
  47  * All volumes will have a volume header file with the filename
  48  * in one of these two formats. The difference is largely historical.
  49  * Early versions of System V Unix had severe limitations on maximum
  50  * filename length, and the '.vol' extension had to be shortened to
  51  * allow for the maximum volume name to fit. Those restrictions no
  52  * longer apply, but the descendants of those legacy AIX and HPUX
  53  * servers still use the shorter name.
  54  *
  55  * If you change VHDREXT, you must change VFORMAT as well. Don't try
  56  * this with token pasting in cpp; it's just too inconsistent in
  57  * across C compilers.
  58  *
  59  * Note that <afs/param.h> must have been included before we get here.
  60  */
  61
  62 #if defined(AFS_AIX_ENV) || defined(AFS_HPUX_ENV)
  63 #define VHDREXT ".vl"
  64 #define VFORMAT "V%010" AFS_VOLID_FMT ".vl"
  65 #else
  66 #define VHDREXT ".vol"
  67 #define VFORMAT "V%010" AFS_VOLID_FMT ".vol"
  68 #endif
  69 #define VHDRNAMELEN (VFORMATDIGITS + 1 + sizeof(VHDREXT) - 1) /* must match VFORMAT */
  70
  71 /* Maximum length (including trailing NUL) of a volume external path name. */
  72 #define VMAXPATHLEN 512
  73
  74 #if defined(AFS_NAMEI_ENV) && !defined(AFS_NT40_ENV)
  75
  76 /* INODEDIR holds all the inodes. Since it's name does not begin with "V"
  77  * and it's created when the first volume is created, linear directory
  78  * searches will find the directory early. If only I had needed this before
  79  * the NT server went beta, it could be used there as well.
  80  */
  81
  82 #define INODEDIR "AFSIDat"
  83 #define INODEDIRLEN (sizeof(INODEDIR)-1)
  84 #endif
  85
  86 /* Pathname for the maximum volume id ever created by this server */
  87
  88 #define MAXVOLIDPATH    "/vice/vol/maxvolid"
  89
  90 /* Pathname for server id definitions. The server id is used to
  91  * allocate volume numbers. */
  92
  93 #define SERVERLISTPATH  "/vice/db/servers"