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tap: forbid creating multiqueue tap when hub is used

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Obviously, hub does not support multiqueue tap. So this patch forbids creating
multiple queue tap when hub is used to prevent the crash when command line such
as "-net tap,queues=2" is used.

Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jason Wang 2013-02-21 11:05:56 +08:00 committed by Stefan Hajnoczi
parent 7d91ddd25e
commit ce675a7579
1 changed files with 7 additions and 0 deletions
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7
net/tap.c
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@ -693,6 +693,13 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
queues = tap->has_queues ? tap->queues : 1;
vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;
/* QEMU vlans does not support multiqueue tap, in this case peer is set.
* For -netdev, peer is always NULL. */
if (peer && (tap->has_queues || tap->has_fds || tap->has_vhostfds)) {
error_report("Multiqueue tap cannnot be used with QEMU vlans");
return -1;
}
if (tap->has_fd) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||