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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-05 22:36:20 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-05 22:36:20 +0000
commit002437cd42a84261fed26b2d0c3feae0e0c9b241 (patch)
tree419c753e67da89f8d52626ac09463f5b42a7a446 /hw/virtio-net.c
parent3d11d36c7fef499128c4194cea7c58d0f7af82ec (diff)
qemu:virtio-net: Add promiscuous and all-multicast mode bits (Alex Williamson)
Add a new RX_MODE control virtqueue class with commands PROMISC and ALLMULTI and usage documented in virtio-net.h allowing the guest to manipulate packet receiving options. We don't export a feature for this until we also add the MAC filter table. Note, for compatibility with older guest drivers we need to default to promiscuous. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6537 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/virtio-net.c')
-rw-r--r--hw/virtio-net.c48
1 files changed, 47 insertions, 1 deletions
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 5a8287bdcc..7e130f740d 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -16,7 +16,7 @@
#include "qemu-timer.h"
#include "virtio-net.h"
-#define VIRTIO_NET_VM_VERSION 3
+#define VIRTIO_NET_VM_VERSION 4
typedef struct VirtIONet
{
@@ -30,6 +30,8 @@ typedef struct VirtIONet
QEMUTimer *tx_timer;
int tx_timer_active;
int mergeable_rx_bufs;
+ int promisc;
+ int allmulti;
} VirtIONet;
/* TODO
@@ -78,6 +80,15 @@ static void virtio_net_set_link_status(VLANClientState *vc)
virtio_notify_config(&n->vdev);
}
+static void virtio_net_reset(VirtIODevice *vdev)
+{
+ VirtIONet *n = to_virtio_net(vdev);
+
+ /* Reset back to compatibility mode */
+ n->promisc = 1;
+ n->allmulti = 0;
+}
+
static uint32_t virtio_net_get_features(VirtIODevice *vdev)
{
uint32_t features = (1 << VIRTIO_NET_F_MAC) |
@@ -94,8 +105,31 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features)
n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
}
+static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
+ VirtQueueElement *elem)
+{
+ uint8_t on;
+
+ if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) {
+ fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
+ exit(1);
+ }
+
+ on = ldub_p(elem->out_sg[1].iov_base);
+
+ if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
+ n->promisc = on;
+ else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI)
+ n->allmulti = on;
+ else
+ return VIRTIO_NET_ERR;
+
+ return VIRTIO_NET_OK;
+}
+
static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
{
+ VirtIONet *n = to_virtio_net(vdev);
struct virtio_net_ctrl_hdr ctrl;
virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
VirtQueueElement elem;
@@ -115,6 +149,9 @@ static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
ctrl.class = ldub_p(elem.out_sg[0].iov_base);
ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class));
+ if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
+ status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem);
+
stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
virtqueue_push(vq, &elem, sizeof(status));
@@ -339,6 +376,8 @@ static void virtio_net_save(QEMUFile *f, void *opaque)
qemu_put_be32(f, n->tx_timer_active);
qemu_put_be32(f, n->mergeable_rx_bufs);
qemu_put_be16(f, n->status);
+ qemu_put_be32(f, n->promisc);
+ qemu_put_be32(f, n->allmulti);
}
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
@@ -357,6 +396,11 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
if (version_id >= 3)
n->status = qemu_get_be16(f);
+ if (version_id >= 4) {
+ n->promisc = qemu_get_be32(f);
+ n->allmulti = qemu_get_be32(f);
+ }
+
if (n->tx_timer_active) {
qemu_mod_timer(n->tx_timer,
qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL);
@@ -385,6 +429,7 @@ void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
n->vdev.set_config = virtio_net_set_config;
n->vdev.get_features = virtio_net_get_features;
n->vdev.set_features = virtio_net_set_features;
+ n->vdev.reset = virtio_net_reset;
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
n->ctrl_vq = virtio_add_queue(&n->vdev, 16, virtio_net_handle_ctrl);
@@ -399,6 +444,7 @@ void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n);
n->tx_timer_active = 0;
n->mergeable_rx_bufs = 0;
+ n->promisc = 1; /* for compatibility */
register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
virtio_net_save, virtio_net_load, n);