On 03/18/2013 07:10 PM, Michael S. Tsirkin wrote:
> On Mon, Mar 18, 2013 at 08:04:44PM +1030, Rusty Russell wrote:
>> It's a bit cleaner to hand multiple sgs, rather than one big one.
>>
>> Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
>> Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
>> ---
>> drivers/net/virtio_net.c | 50 +++++++++++++++++++++++-----------------------
>> 1 file changed, 25 insertions(+), 25 deletions(-)
>>
>> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
>> index 57ac4b0..f19865a 100644
>> --- a/drivers/net/virtio_net.c
>> +++ b/drivers/net/virtio_net.c
>> @@ -39,7 +39,6 @@ module_param(gso, bool, 0444);
>> #define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
>> #define GOOD_COPY_LEN 128
>>
>> -#define VIRTNET_SEND_COMMAND_SG_MAX 2
>> #define VIRTNET_DRIVER_VERSION "1.0.0"
>>
>> struct virtnet_stats {
>> @@ -767,32 +766,34 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
>> * never fail unless improperly formated.
>> */
>> static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
>> - struct scatterlist *data, int out, int in)
>> + struct scatterlist *out,
>> + struct scatterlist *in)
>> {
>> - struct scatterlist *s, sg[VIRTNET_SEND_COMMAND_SG_MAX + 2];
>> + struct scatterlist *sgs[4], hdr, stat;
>> struct virtio_net_ctrl_hdr ctrl;
>> virtio_net_ctrl_ack status = ~0;
>> - unsigned int tmp;
>> - int i;
>> + unsigned out_num = 0, in_num = 0, tmp;
>>
>> /* Caller should know better */
>> - BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ) ||
>> - (out + in > VIRTNET_SEND_COMMAND_SG_MAX));
>> -
>> - out++; /* Add header */
>> - in++; /* Add return status */
>> + BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ));
>>
>> ctrl.class = class;
>> ctrl.cmd = cmd;
>> + /* Add header */
>> + sg_init_one(&hdr, &ctrl, sizeof(ctrl));
>> + sgs[out_num++] = &hdr;
>>
>> - sg_init_table(sg, out + in);
>> + if (out)
>> + sgs[out_num++] = out;
>> + if (in)
>> + sgs[out_num + in_num++] = in;
>>
>> - sg_set_buf(&sg[0], &ctrl, sizeof(ctrl));
>> - for_each_sg(data, s, out + in - 2, i)
>> - sg_set_buf(&sg[i + 1], sg_virt(s), s->length);
>> - sg_set_buf(&sg[out + in - 1], &status, sizeof(status));
>> + /* Add return status. */
>> + sg_init_one(&stat, &status, sizeof(status));
>> + sgs[out_num + in_num++] = &hdr;
>
> Should be &stat?
Good catch!!!
This is why I met the error message here:
[ 9.914123] net eth0: Failed to disable promisc mode.
[ 9.914958] net eth0: Failed to disable allmulti mode.
[ 9.915778] net eth0: Failed to set MAC fitler table.
[ 9.916564] net eth0: Failed to disable promisc mode.
[ 9.917322] net eth0: Failed to disable allmulti mode.
[ 9.918095] net eth0: Failed to set MAC fitler table.
[ 9.918876] net eth0: Failed to disable promisc mode.
[ 9.919636] net eth0: Failed to disable allmulti mode.
[ 9.920403] net eth0: Failed to set MAC fitler table.
[ 9.921183] net eth0: Failed to disable promisc mode.
[ 9.921921] net eth0: Failed to disable allmulti mode.
[ 9.922680] net eth0: Failed to set MAC fitler table.
[ 11.943884] net eth0: Failed to disable promisc mode.
[ 11.945460] net eth0: Failed to disable allmulti mode.
[ 11.946987] net eth0: Failed to set MAC fitler table.
network[503]: Bringing up interface eth0: [ OK ]
[ 12.242277] net eth0: Failed to disable promisc mode.
[ 12.243081] net eth0: Failed to disable allmulti mode.
[ 12.243824] net eth0: Failed to set MAC fitler table.
With &stat now, it has gone.
Tested-by: Wanlong Gao <gaowanlong@xxxxxxxxxxxxxx>
Regards,
Wanlong Gao
>
> Also
> BUG_ON(out_num + in_num > ARRAY_SIZE(sgs))
> probably a good idea?
>
>>
>> - BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi, GFP_ATOMIC) < 0);
>> + BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC)
>> + < 0);
>>
>> virtqueue_kick(vi->cvq);
>>
>> @@ -821,7 +822,7 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p)
>> sg_init_one(&sg, addr->sa_data, dev->addr_len);
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
>> VIRTIO_NET_CTRL_MAC_ADDR_SET,
>> - &sg, 1, 0)) {
>> + &sg, NULL)) {
>> dev_warn(&vdev->dev,
>> "Failed to set mac address by vq command.\n");
>> return -EINVAL;
>> @@ -889,8 +890,7 @@ static void virtnet_ack_link_announce(struct virtnet_info *vi)
>> {
>> rtnl_lock();
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE,
>> - VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL,
>> - 0, 0))
>> + VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL, NULL))
>> dev_warn(&vi->dev->dev, "Failed to ack link announce.\n");
>> rtnl_unlock();
>> }
>> @@ -908,7 +908,7 @@ static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs)
>> sg_init_one(&sg, &s, sizeof(s));
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
>> - VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg, 1, 0)){
>> + VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg, NULL)) {
>> dev_warn(&dev->dev, "Fail to set num of queue pairs to %d\n",
>> queue_pairs);
>> return -EINVAL;
>> @@ -955,7 +955,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
>> VIRTIO_NET_CTRL_RX_PROMISC,
>> - sg, 1, 0))
>> + sg, NULL))
>> dev_warn(&dev->dev, "Failed to %sable promisc mode.\n",
>> promisc ? "en" : "dis");
>>
>> @@ -963,7 +963,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
>> VIRTIO_NET_CTRL_RX_ALLMULTI,
>> - sg, 1, 0))
>> + sg, NULL))
>> dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n",
>> allmulti ? "en" : "dis");
>>
>> @@ -1000,7 +1000,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
>> VIRTIO_NET_CTRL_MAC_TABLE_SET,
>> - sg, 2, 0))
>> + sg, NULL))
>> dev_warn(&dev->dev, "Failed to set MAC fitler table.\n");
>>
>> kfree(buf);
>> @@ -1014,7 +1014,7 @@ static int virtnet_vlan_rx_add_vid(struct net_device *dev, u16 vid)
>> sg_init_one(&sg, &vid, sizeof(vid));
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
>> - VIRTIO_NET_CTRL_VLAN_ADD, &sg, 1, 0))
>> + VIRTIO_NET_CTRL_VLAN_ADD, &sg, NULL))
>> dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid);
>> return 0;
>> }
>> @@ -1027,7 +1027,7 @@ static int virtnet_vlan_rx_kill_vid(struct net_device *dev, u16 vid)
>> sg_init_one(&sg, &vid, sizeof(vid));
>>
>> if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
>> - VIRTIO_NET_CTRL_VLAN_DEL, &sg, 1, 0))
>> + VIRTIO_NET_CTRL_VLAN_DEL, &sg, NULL))
>> dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid);
>> return 0;
>> }
>> --
>> 1.7.10.4
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