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virtio-net: add vlan receive state to RxFilterInfo

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Stefan Fritsch just fixed a virtio-net driver bug [1], virtio-net won't
filter out VLAN-tagged packets if VIRTIO_NET_F_CTRL_VLAN isn't negotiated.

This patch added a new field to @RxFilterInfo to indicate vlan receive
state ('normal', 'none', 'all'). If VIRTIO_NET_F_CTRL_VLAN isn't
negotiated, vlan receive state will be 'all', then all VLAN-tagged packets
will be received by guest.

This patch also fixed a boundary issue in visiting vlan table.

[1] http://lists.nongnu.org/archive/html/qemu-devel/2014-02/msg02604.html

Signed-off-by: Amos Kong <akong@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Amos Kong 2014-03-26 08:19:43 +08:00 • committed by Michael S. Tsirkin
parent 0b1eaa8803
commit f7bc8ef809
3 changed files with 34 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

42
hw/net/virtio-net.c
View file

@ -222,13 +222,33 @@ static char *mac_strdup_printf(const uint8_t *mac)
mac[1], mac[2], mac[3], mac[4], mac[5]);
}
static intList *get_vlan_table(VirtIONet *n)
{
intList *list, *entry;
int i, j;
list = NULL;
for (i = 0; i < MAX_VLAN >> 5; i++) {
for (j = 0; n->vlans[i] && j <= 0x1f; j++) {
if (n->vlans[i] & (1U << j)) {
entry = g_malloc0(sizeof(*entry));
entry->value = (i << 5) + j;
entry->next = list;
list = entry;
}
}
}
return list;
}
static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
{
VirtIONet *n = qemu_get_nic_opaque(nc);
VirtIODevice *vdev = VIRTIO_DEVICE(n);
RxFilterInfo *info;
strList *str_list, *entry;
intList *int_list, *int_entry;
int i, j;
int i;
info = g_malloc0(sizeof(*info));
info->name = g_strdup(nc->name);
@ -273,19 +293,15 @@ static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
str_list = entry;
}
info->multicast_table = str_list;
info->vlan_table = get_vlan_table(n);
int_list = NULL;
for (i = 0; i < MAX_VLAN >> 5; i++) {
for (j = 0; n->vlans[i] && j < 0x1f; j++) {
if (n->vlans[i] & (1U << j)) {
int_entry = g_malloc0(sizeof(*int_entry));
int_entry->value = (i << 5) + j;
int_entry->next = int_list;
int_list = int_entry;
}
}
if (!((1 << VIRTIO_NET_F_CTRL_VLAN) & vdev->guest_features)) {
info->vlan = RX_STATE_ALL;
} else if (!info->vlan_table) {
info->vlan = RX_STATE_NONE;
} else {
info->vlan = RX_STATE_NORMAL;
}
info->vlan_table = int_list;
/* enable event notification after query */
nc->rxfilter_notify_enabled = 1;