udev-lfs/init-net-rules.sh

   1 #! /bin/bash
   2
   3 # This script generates rules for persistent network device naming
   4 # Data from udev-182 75-persistent-net-generator.rules
   5 # Updated fof udev-197 (DEVICES=en*)
   6
   7 RULES=/etc/udev/rules.d/70-persistent-net.rules
   8 DEVICES=$(eval echo /sys/class/net/{en*,eth*,ath*,wlan*[0-9],msh*,ra*,sta*,ctc*,lcs*,hsi*})
   9
  10 function usage
  11 {
  12   echo $msg
  13   echo "init-net-rules.sh is an LFS-specific script to initialize"
  14   echo "$RULES"
  15   exit 1
  16 }
  17
  18 declare -A VENDORS_IGNORED
  19 VENDORS_IGNORED['52:54:00:']="kvm"
  20 VENDORS_IGNORED['00:0c:29:']="vmware"
  21 VENDORS_IGNORED['00:50:56:']="vmware"
  22 VENDORS_IGNORED['00:15:5d:']="hyper-v"
  23 VENDORS_IGNORED['00:00:00:']="invalid"
  24
  25 declare -A VENDORS
  26 VENDORS['02:07:01:']="Interlan, DEC, etc"
  27 VENDORS['02:60:60:']="3com"
  28 VENDORS['02:60:8c:']="3Com IBM PC; Imagen. etc"
  29 VENDORS['02:a0:c9:']="intel"
  30 VENDORS['02:aa:3c:']="Olivetti"
  31 VENDORS['02:cf:1f:']="Masscomp, Silicon Graphics, etc"
  32 VENDORS['02:e0:3b:']="Gigabit"
  33 VENDORS['02:e6:d3:']="BTI"
  34 VENDORS['52:54:00:']="Realtek"
  35 VENDORS['52:54:4c:']="Novell"
  36 VENDORS['52:54:ab:']="Realtek"
  37 VENDORS['e2:0c:0f:']="Kingston"
  38 VENDORS['00:16:3e:']="Xensource"
  39
  40 function ignore_if
  41 {
  42    if [[ "${VENDORS_IGNORED[$VENDOR]}" != "" ]]; then return 0; fi
  43    if [[ "${VENDORS[$VENDOR]}"         != "" ]]; then return 1; fi
  44
  45    byte2=$(echo $VENDOR | cut -c2)
  46    if echo $byte2 | grep -q "[2367abef]"; then return 0; fi
  47
  48    return 1  # Default is to not ignore
  49 }
  50
  51 function comment
  52 {
  53   # Not implemented
  54   # SUBSYSTEMS=="pci"
  55   # export COMMENT="PCI device $attr{vendor}:$attr{device} ($driver)"
  56
  57   # SUBSYSTEMS=="usb", ATTRS{idVendor}=="?*"
  58   # export COMMENT="USB device 0x$attr{idVendor}:0x$attr{idProduct} ($driver)"
  59
  60   # SUBSYSTEMS=="pcmcia",
  61   # export COMMENT="PCMCIA device $attr{card_id}:$attr{manf_id} ($driver)"
  62
  63   # SUBSYSTEMS=="ieee1394",
  64   # export COMMENT="Firewire device $attr{host_id})"
  65
  66   # ibmveth likes to use "locally administered" MAC addresses
  67   # DRIVERS=="ibmveth",
  68   # export COMMENT="ibmveth ($id)"
  69
  70   # S/390 uses id matches only, do not use MAC address match
  71   # SUBSYSTEMS=="ccwgroup",
  72   # export COMMENT="S/390 $driver device at $id",
  73   # export MATCHID="$id"
  74   # export MATCHDRV="$driver"
  75   # export MATCHADDR=""
  76
  77   # Default
  78   driver=$(basename $(readlink -f $NIC/device/driver/module))
  79   export COMMENT="net device ${driver}"
  80 }
  81
  82 if ! mountpoint -q /sys; then
  83   msg="/sys must be mounted"
  84   usage
  85 fi
  86
  87 if ! mountpoint -q /proc; then
  88   msg="/proc must be mounted"
  89   usage
  90 fi
  91
  92 if [ -e $RULES ]; then
  93   msg="The rules file already exists"
  94   usage
  95 fi
  96
  97 # Ignore Xen virtual interfaces
  98 if [ -e /proc/xen ]; then
  99   msg="The rules file should not be created in the Xen environment"
 100   usage
 101 fi
 102
 103 # Variables used to communicate with write_net_rules:
 104 #   INTERFACE             simple interface name
 105 #   MATCHADDR             MAC address used for the match
 106 #   MATCHID               bus_id used for the match
 107 #   MATCHDRV              driver name used for the match
 108 #   MATCHIFTYPE           interface type match
 109 #   COMMENT               comment to add to the generated rule
 110 #   INTERFACE_NAME        requested name supplied by external tool
 111 #   INTERFACE_NEW         new interface name returned by rule writer
 112
 113 for NIC in $DEVICES; do
 114      IF=${NIC##*/}
 115      if echo $NIC | grep -q '*' ; then continue; fi
 116
 117      export INTERFACE=${NIC##*/}            # Simple interface name
 118      export MATCHADDR="$(cat $NIC/address)" # Read MAC address
 119
 120      VENDOR=$(echo $MATCHADDR | cut -c-9)
 121      if ignore_if; then continue; fi
 122
 123      export MATCHDEVID="$(cat $NIC/dev_id)"
 124      export MATCHIFTYPE="$(cat $NIC/type)"  # Read interface type
 125      comment
 126
 127      /lib/udev/write_net_rules
 128 done
 129