net: fix infinite loop on exit

1ceef9f27359cbe92ef124bf74de6f792e71f6fb added handling for cleaning
up multiple queues in qemu_del_nic() for cases where multiqueue is in
use. To determine the number of queues it looks at nic->conf->queues,
then iterates through all the queues to cleanup the associated
NetClientStates. If no queues are found, no NetClientStates are deleted.

However, nic->conf->queues is only set when a peer is created via
-netdev or netdev_add, and is otherwise 0. This causes us to spin in
net_cleanup() if we attempt to shut down qemu before adding a host
device.

Since qemu_new_nic() unconditionally creates at least 1
queue/NetClientState at queue idx 0, make qemu_del_nic() always attempt
to clean it up.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
virtio-net: pass host features to virtio_net_init

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
hw/virtio-net.c: set config size using host features

Currently, the config size for virtio devices is hard coded. When a new
feature is added that changes the config size, drivers that assume a static
config size will break. For purposes of backward compatibility, there needs
to be a way to inform drivers of the config size needed to accommodate the
set of features enabled.

aliguori: merged in
 - hw/virtio-net: use existing macros to implement endof
 - hw/virtio-net: fix config_size data type

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
hw/virtio-net: disable multiqueue by default

The new multiqueue feature adds fields to the virtio device config, which
breaks Windows guests. Disable the feature by default until the Windows
drivers are fixed.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
qemu-nbd: document --cache and --aio options

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
block/curl: disable extra protocols to prevent CVE-2013-0249

There is a buffer overflow in libcurl POP3/SMTP/IMAP.  The workaround is
simple: disable extra protocols so that they cannot be exploited.  Full
details here:

  http://curl.haxx.se/docs/adv_20130206.html

QEMU only cares about HTTP, HTTPS, FTP, FTPS, and TFTP.  I have tested
that this fix prevents the exploit on my host with
libcurl-7.27.0-5.fc18.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
xilinx_zynq: Fix wrong IRQ number of the second EHCI controller

The IRQ number of the second EHCI controller should be 76, not 75.

Signed-off-by: Liming Wang <walimisdev@gmail.com>
Tested-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>