scripts/vserver-setup.functions

   1 # $Id: vserver-setup.functions 2517 2007-03-18 22:02:22Z dhozac $       --*- sh -*--
   2
   3 # Copyright (C) 2003,2004,2005,2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; version 2 of the License.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 SETUP_HOSTNAME=
  19 SETUP_NETDEV=
  20 SETUP_NETMASK=
  21 SETUP_NETPREFIX=
  22 SETUP_NETBCAST=
  23 SETUP_LOCKFILE=
  24 SETUP_CONFDIR=
  25 SETUP_CONTEXT=
  26 SETUP_INITSTYLE=
  27 SETUP_CPUSET=
  28 SETUP_CPUSETCPUS=
  29 SETUP_CPUSETMEMS=
  30 SETUP_CPUSETVIRT=
  31
  32 declare -a SETUP_INTERFACES=()
  33 declare -a SETUP_FLAGS=()
  34
  35 declare -r SETUP_OPTIONS="confdir:,lockfile:,hostname:,netdev:,netmask:,netprefix:,netbcast:,interface:,flags:,context:,initstyle:,cpuset:,cpusetcpus:,cpusetmems:,cpusetvirt"
  36 declare -r SETUP_HELPMSG=$"
  37     --context   ...  the static context of the vserver [default: none; one will
  38                      be generated for you]
  39     --confdir   ...  [default: $__CONFDIR/<name>]
  40     --lockfile <filename>
  41                 ...  [default: $__RUNDIR/<name>]
  42     --hostname <hostname>
  43     --netdev   <device>
  44     --netbcast <broadcast>
  45     --netmask <netmask>|--netprefix <prefixlen>
  46                 ...  sets the  default netmask  (a.b.c.d quadruple)  or prefixlen
  47                      (length of the interface)
  48     --interface [<name-suffix>=][<device>:]<ip>[/<mask|prefixlen>]
  49                 ...  declares an network-interface;  this option can be specified
  50                      multiple times
  51     --flags <flags>+
  52                 ...  sets comma-separated list of flags; possible flags are
  53                      lock:  Prevent the vserver from setting new security context
  54                      sched: Merge  scheduler priority  of all processes in the
  55                             vserver so that it acts a like a single
  56                             one (kernel 2.4 only).
  57                      nproc: Limit the number of processes in the vserver
  58                             according to ulimit  (instead of a per user limit,
  59                             this becomes a per vserver limit)
  60                      private: No other process can join this security context.
  61                             Even root
  62     --cpuset <name>
  63                 ...  declares the CPUSET this vserver will run in [default: none]
  64     --cpusetcpus <number[-number][:<exclusive>]>
  65                 ...  sets which cpus belong to the CPUSET,
  66                      exclusive is a flag (0|1) prohibiting any other cpuset from
  67                      using those cpus
  68     --cpusetmems <number[-number][:<exclusive>]>
  69                 ...  sets which memory pools belong to the CPUSET,
  70                      exclusive is a flag (0|1) prohibiting any other cpuset from
  71                      using those memory pools
  72     --cpusetvirt
  73                 ...  virtualize cpuset (guest will see only CPUs defined in cpuset)
  74                      Requires kernel patch from http://www.bullopensource.org/cpuset/
  75     --initstyle <style>
  76                 ...  configures the initstyle (e.g. minit,sysv,plain)
  77 "
  78
  79 function setup_setOption2
  80 {
  81     case "$1" in
  82         (--context)     SETUP_CONTEXT=$2;;
  83         (--confdir)     SETUP_CONFDIR=$2;;
  84         (--lockfile)    SETUP_LOCKFILE=$2;;
  85         (--hostname)    SETUP_HOSTNAME=$2;;
  86         (--netdev)      SETUP_NETDEV=$2;;
  87         (--netmask)     SETUP_NETMASK=$2;;
  88         (--netprefix)   SETUP_NETPREFIX=$2;;
  89         (--netbcast)    SETUP_NETBCAST=$2;;
  90         (--interface)   SETUP_INTERFACES=( "${SETUP_INTERFACES[@]}" "$2" );;
  91         (--initstyle)   SETUP_INITSTYLE=$2;;
  92         (--cpuset)      SETUP_CPUSET=$2;;
  93         (--cpusetcpus)  old_IFS=$IFS
  94                         IFS=:
  95                         set -- $2
  96                         SETUP_CPUSETCPUS=$1
  97                         SETUP_CPUSETCPUSEXCL=$2
  98                         IFS=$old_IFS
  99                         ;;
 100         (--cpusetmems)  old_IFS=$IFS
 101                         IFS=:
 102                         set -- $2
 103                         SETUP_CPUSETMEMS=$1
 104                         SETUP_CPUSETMEMSEXCL=$2
 105                         IFS=$old_IFS
 106                         ;;
 107         (--cpusetvirt)  SETUP_CPUSETVIRT=1;;
 108         (--flags)       old_IFS=$IFS
 109                         IFS=,
 110                         set -- $2
 111                         SETUP_FLAGS=( "${SETUP_FLAGS[@]}" "$@" )
 112                         IFS=$old_IFS
 113                         ;;
 114         (*)             return 1;;
 115     esac
 116
 117     return 0
 118 }
 119
 120 function _setup_writeSingleOption
 121 {
 122     test -z "$1" || echo "$1" >"$2"
 123 }
 124
 125 function _setup_writeInterface
 126 {
 127     local vdir=$1
 128     local idx=$2
 129     local tmp=$3
 130
 131     local name=${tmp%%=*}
 132     test "$name" != "$tmp" || name=
 133
 134     tmp=${tmp##${name}=}
 135     local dev=${tmp%%:*}
 136     local nodev=
 137     test "$dev" != "$tmp"  || dev=
 138
 139     tmp=${tmp##${dev}:}
 140     test "$dev" != "nodev" || {
 141         dev=
 142         nodev=1
 143     }
 144     local mask=${tmp##*/}
 145     test "$mask" != "$tmp"  || mask=
 146
 147     local ip=${tmp%%/${mask}}
 148
 149     local prefix=
 150     test "${mask%%.*}" != "$mask" || {
 151         prefix=$mask
 152         mask=
 153     }
 154
 155     d=$vdir/interfaces/$idx
 156     mkdir "$d"
 157
 158     _setup_writeSingleOption "$name"   $d/name
 159     _setup_writeSingleOption "$dev"    $d/dev
 160     _setup_writeSingleOption "$ip"     $d/ip
 161     _setup_writeSingleOption "$mask"   $d/mask
 162     _setup_writeSingleOption "$prefix" $d/prefix
 163
 164     test -n "$dev" -o -n "$SETUP_NETDEV" || {
 165         test -n "$nodev" || \
 166             echo $"No device specified for interface '$idx'; setting 'nodev'" >&2
 167         $_TOUCH $d/nodev
 168     }
 169 }
 170
 171 function setup_setDefaults
 172 {
 173     : ${SETUP_CONFDIR:=$__CONFDIR/$1}
 174     : ${SETUP_LOCKFILE:=$__RUNDIR/$1}
 175     findFile SETUP_FSTAB "$__CONFDIR"/.defaults/fstab "$__PKGLIBDEFAULTDIR"/fstab
 176 }
 177
 178 function _setup_generateContext
 179 {
 180     if test -z "$SETUP_CONTEXT" && test ! -e "$__CONFDIR/.defaults/context.dynamic"; then
 181         if test -e "$__CONFDIR/.defaults/context.next"; then
 182             SETUP_CONTEXT=`$_CAT "$__CONFDIR/.defaults/context.next"`
 183         else
 184             SETUP_CONTEXT=`$_CAT "$__PKGLIBDEFAULTDIR/context.start"`
 185         fi
 186         expr "$SETUP_CONTEXT" + 1 > "$__CONFDIR/.defaults/context.next"
 187     fi
 188 }
 189
 190 function setup_writeOption
 191 {
 192     local name=$1
 193     local cfgdir=${SETUP_CONFDIR:?}
 194     local i
 195
 196     mkdir -p "$cfgdir"/interfaces "$cfgdir"/apps/init "$cfgdir"/uts "$cfgdir"/cpuset
 197
 198     _setup_generateContext
 199
 200     _setup_writeSingleOption "$name"            "$cfgdir"/name
 201     _setup_writeSingleOption "$SETUP_CONTEXT"   "$cfgdir"/context
 202     _setup_writeSingleOption "$SETUP_HOSTNAME"  "$cfgdir"/uts/nodename
 203     _setup_writeSingleOption "$SETUP_NETDEV"    "$cfgdir"/interfaces/dev
 204     _setup_writeSingleOption "$SETUP_NETMASK"   "$cfgdir"/interfaces/mask
 205     _setup_writeSingleOption "$SETUP_NETPREFIX" "$cfgdir"/interfaces/prefix
 206     _setup_writeSingleOption "$SETUP_NETBCAST"  "$cfgdir"/interfaces/bcast
 207     _setup_writeSingleOption "$SETUP_INITSTYLE" "$cfgdir"/apps/init/style
 208     _setup_writeSingleOption "$SETUP_CPUSET"    "$cfgdir"/cpuset/name
 209     _setup_writeSingleOption "$SETUP_CPUSETCPUS"     "$cfgdir"/cpuset/cpus
 210     _setup_writeSingleOption "$SETUP_CPUSETCPUSEXCL" "$cfgdir"/cpuset/cpus_exclusive
 211     _setup_writeSingleOption "$SETUP_CPUSETMEMS"     "$cfgdir"/cpuset/mems
 212     _setup_writeSingleOption "$SETUP_CPUSETMEMSEXCL" "$cfgdir"/cpuset/mem_exclusive
 213     _setup_writeSingleOption "$SETUP_CPUSETVIRT"     "$cfgdir"/cpuset/virtualized
 214
 215     local idx=0
 216     for i in "${SETUP_INTERFACES[@]}"; do
 217         _setup_writeInterface "$cfgdir" $idx "$i"
 218         let ++idx
 219     done
 220
 221     test -z "$SETUP_FLAGS" || for i in "${SETUP_FLAGS[@]}"; do
 222         echo "$i"
 223     done >"$cfgdir"/flags
 224
 225     ln -s "$SETUP_LOCKFILE"   "$cfgdir"/run
 226 }
 227
 228 function setup_writeInitialFstab
 229 {
 230     cat "${SETUP_FSTAB:?}" >"${SETUP_CONFDIR:?}"/fstab
 231 }
 232
 233 function setup_test
 234 {
 235     SETUP_INTERFACES=()
 236
 237     setup_setOption2 --interface foo0=eth0:1.2.3.4/1
 238     setup_setOption2 --interface foo1=eth0:1.2.3.4/255.255.248.0
 239     setup_setOption2 --interface foo2=eth0:1.2.3.4
 240     setup_setOption2 --interface foo3=1.2.3.4
 241     setup_setOption2 --interface foo4=1.2.3.4/1
 242     setup_setOption2 --interface eth0:1.2.3.4
 243     setup_setOption2 --interface eth0:1.2.3.4/1
 244     setup_setOption2 --interface 1.2.3.4
 245     setup_setOption2 --interface 1.2.3.4/1
 246
 247     setup_writeOption xx
 248 }