[Qemu-devel] [Bug 770173] [NEW] /etc/qemu-ifup is not executed

[Carlos Eduardo Moreira dos Santos]

Public bug reported:

The following does not work:
$ qemu -m 512 -drive file=arch_min.qcow2,if=virtio,boot=on -nographic -net 
nic,model=virtio -net tap,script=/etc/qemu-ifup
warning: could not configure /dev/net/tun: no virtual network emulation

However, this works:
$ /etc/qemu-ifup tap0
$ kvm -m 512 -drive file=arch_min.qcow2,if=virtio,boot=on -nographic -net 
nic,model=virtio -net tap,ifname=tap0,script=no,downscript=no
$ /etc/qemu-ifdown tap0

Other info:

- qemu 0.12.5
- ubuntu 10.10

$ ls -l /etc/qemu-ifup
lrwxrwxrwx 1 root root  18 2011-03-26 15:57 /etc/qemu-ifup -> 
/usr/bin/qemu-ifup*

$ cat /etc/qemu-ifup
#!/bin/sh

#switch=$(/sbin/ip route list | awk '/^default / { print $5 }')
#/sbin/ifconfig $1 0.0.0.0 up
#/usr/sbin/brctl addif ${switch} $1

set -x

switch=br0

if [ -n "$1" ];then
  /usr/bin/sudo /etc/qemu-ifup-sudo $1 `whoami`
  exit 0
else
  echo "Error: no interface specified"
  exit 1
fi

$ cat /etc/qemu-ifup-sudo
#!/bin/sh

set -x

switch=br0

/usr/sbin/tunctl -u $2 -t $1
/usr/bin/sudo /sbin/ip link set $1 up
sleep 0.5s
/usr/bin/sudo /usr/sbin/brctl addif $switch $1

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/770173

Title:
  /etc/qemu-ifup is not executed

Status in QEMU:
  New

Bug description:
  The following does not work:
  $ qemu -m 512 -drive file=arch_min.qcow2,if=virtio,boot=on -nographic -net 
nic,model=virtio -net tap,script=/etc/qemu-ifup
  warning: could not configure /dev/net/tun: no virtual network emulation

  However, this works:
  $ /etc/qemu-ifup tap0
  $ kvm -m 512 -drive file=arch_min.qcow2,if=virtio,boot=on -nographic -net 
nic,model=virtio -net tap,ifname=tap0,script=no,downscript=no
  $ /etc/qemu-ifdown tap0

  Other info:

  - qemu 0.12.5
  - ubuntu 10.10

  $ ls -l /etc/qemu-ifup
  lrwxrwxrwx 1 root root  18 2011-03-26 15:57 /etc/qemu-ifup -> 
/usr/bin/qemu-ifup*

  $ cat /etc/qemu-ifup
  #!/bin/sh

  #switch=$(/sbin/ip route list | awk '/^default / { print $5 }')
  #/sbin/ifconfig $1 0.0.0.0 up
  #/usr/sbin/brctl addif ${switch} $1

  set -x

  switch=br0

  if [ -n "$1" ];then
    /usr/bin/sudo /etc/qemu-ifup-sudo $1 `whoami`
    exit 0
  else
    echo "Error: no interface specified"
    exit 1
  fi

  $ cat /etc/qemu-ifup-sudo
  #!/bin/sh

  set -x

  switch=br0

  /usr/sbin/tunctl -u $2 -t $1
  /usr/bin/sudo /sbin/ip link set $1 up
  sleep 0.5s
  /usr/bin/sudo /usr/sbin/brctl addif $switch $1