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Date: Wed, 07 Jan 2009 11:06:02 -0700
From: Alex Williamson <alex.williamson@...com>
To: Rusty Russell <rusty@...tcorp.com.au>
Cc: kvm <kvm@...r.kernel.org>, netdev <netdev@...r.kernel.org>,
Mark McLoughlin <markmc@...hat.com>
Subject: [PATCH 1/2][RFC] virtio_net: Enable setting MAC, promisc, and
allmulti mode
virtio_net: Enable setting MAC, promisc, and allmulti mode
Signed-off-by: Alex Williamson <alex.williamson@...com>
---
drivers/net/virtio_net.c | 79 ++++++++++++++++++++++++++++++++++++++++----
include/linux/virtio_net.h | 11 ++++++
2 files changed, 82 insertions(+), 8 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3af5e33..f502edd 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -41,7 +41,14 @@ struct virtnet_info
struct virtqueue *rvq, *svq;
struct net_device *dev;
struct napi_struct napi;
- unsigned int status;
+ union {
+ u16 raw;
+ struct {
+ u16 link:1;
+ u16 promisc:1;
+ u16 allmulti:1;
+ } bits;
+ } status;
/* The skb we couldn't send because buffers were full. */
struct sk_buff *last_xmit_skb;
@@ -476,6 +483,54 @@ static int virtnet_set_tx_csum(struct net_device *dev, u32 data)
return ethtool_op_set_tx_hw_csum(dev, data);
}
+static int virtnet_set_mac_address(struct net_device *dev, void *p)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+ struct virtio_device *vdev = vi->vdev;
+ struct sockaddr *addr = p;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+
+ vdev->config->set(vdev, offsetof(struct virtio_net_config, mac),
+ dev->dev_addr, dev->addr_len);
+
+ return 0;
+}
+
+static void virtnet_set_rx_mode(struct net_device *dev)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+ struct virtio_device *vdev = vi->vdev;
+ u16 status = vi->status.raw;
+
+ if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS))
+ return;
+
+ if (dev->flags & IFF_PROMISC)
+ status |= VIRTIO_NET_S_PROMISC;
+ else
+ status &= ~VIRTIO_NET_S_PROMISC;
+
+ if (dev->flags & IFF_ALLMULTI)
+ status |= VIRTIO_NET_S_ALLMULTI;
+ else
+ status &= ~VIRTIO_NET_S_ALLMULTI;
+
+ if (dev->uc_count)
+ status |= VIRTIO_NET_S_PROMISC;
+ if (dev->mc_count)
+ status |= VIRTIO_NET_S_ALLMULTI;
+
+ if (status != vi->status.raw) {
+ vi->status.raw = status;
+ vdev->config->set(vdev, offsetof(struct virtio_net_config,
+ status), &vi->status, sizeof(vi->status));
+ }
+}
+
static struct ethtool_ops virtnet_ethtool_ops = {
.set_tx_csum = virtnet_set_tx_csum,
.set_sg = ethtool_op_set_sg,
@@ -494,14 +549,15 @@ static void virtnet_update_status(struct virtnet_info *vi)
&v, sizeof(v));
/* Ignore unknown (future) status bits */
- v &= VIRTIO_NET_S_LINK_UP;
+ v &= VIRTIO_NET_S_LINK_UP | VIRTIO_NET_S_PROMISC |
+ VIRTIO_NET_S_ALLMULTI;
- if (vi->status == v)
+ if (vi->status.raw == v)
return;
- vi->status = v;
+ vi->status.raw = v;
- if (vi->status & VIRTIO_NET_S_LINK_UP) {
+ if (vi->status.bits.link) {
netif_carrier_on(vi->dev);
netif_wake_queue(vi->dev);
} else {
@@ -563,8 +619,17 @@ static int virtnet_probe(struct virtio_device *vdev)
vdev->config->get(vdev,
offsetof(struct virtio_net_config, mac),
dev->dev_addr, dev->addr_len);
- } else
+ } else {
+ struct sockaddr addr;
+
random_ether_addr(dev->dev_addr);
+ memset(&addr, 0, sizeof(addr));
+ memcpy(&addr.sa_data, dev->dev_addr, dev->addr_len);
+ virtnet_set_mac_address(dev, &addr);
+ }
+
+ dev->set_mac_address = virtnet_set_mac_address;
+ dev->set_rx_mode = virtnet_set_rx_mode;
/* Set up our device-specific information */
vi = netdev_priv(dev);
@@ -621,7 +686,7 @@ static int virtnet_probe(struct virtio_device *vdev)
goto unregister;
}
- vi->status = VIRTIO_NET_S_LINK_UP;
+ vi->status.raw = VIRTIO_NET_S_LINK_UP;
virtnet_update_status(vi);
pr_debug("virtnet: registered device %s\n", dev->name);
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index d9174be..5a70edb 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -23,6 +23,8 @@
#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+#define VIRTIO_NET_S_PROMISC 2 /* Promiscuous mode */
+#define VIRTIO_NET_S_ALLMULTI 4 /* All-multicast mode */
struct virtio_net_config
{
@@ -30,7 +32,14 @@ struct virtio_net_config
__u8 mac[6];
/* Status supplied by host; see VIRTIO_NET_F_STATUS and VIRTIO_NET_S_*
* bits above */
- __u16 status;
+ union {
+ __u16 raw;
+ struct {
+ __u16 link:1;
+ __u16 promisc:1;
+ __u16 allmulti:1;
+ } bits;
+ } status;
} __attribute__((packed));
/* This is the first element of the scatter-gather list. If you don't
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