From: Vlad Yasevich <vyasevic@redhat•com>
To: Ding Tianhong <dingtianhong@huawei•com>,
kaber@trash•net, davem@davemloft•net, edumazet@google•com,
makita.toshiaki@lab•ntt.co.jp
Cc: netdev@vger•kernel.org, John Fastabend <john.r.fastabend@intel•com>
Subject: Re: [PATCH net-next v2 RESEND 1/4] macvlan: support mac address changes when fwd_priv is enable
Date: Mon, 09 Jun 2014 12:51:35 -0400 [thread overview]
Message-ID: <5395E617.5080307@redhat.com> (raw)
In-Reply-To: <1402127143-6456-2-git-send-email-dingtianhong@huawei.com>
[.. CC John Fastabend <john.r.fastabend@intel•com> ]
On 06/07/2014 03:45 AM, Ding Tianhong wrote:
> If lowerdev supports L2 forwarding offload, the macvlan's hw address
> will be set to the rar of the lowerdev and no need to set uc list,
> and when the macvlan's hw address changes, the macvlan should remove
> the old fwd and rebuild a new fwd for the macvlan.
>
> Signed-off-by: Ding Tianhong <dingtianhong@huawei•com>
> ---
> drivers/net/macvlan.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
> index 453d55a..67485ab 100644
> --- a/drivers/net/macvlan.c
> +++ b/drivers/net/macvlan.c
> @@ -523,6 +523,27 @@ static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
> if (macvlan_addr_busy(vlan->port, addr))
> return -EBUSY;
>
> + if (vlan->fwd_priv) {
> + lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
> + vlan->fwd_priv);
> + vlan->fwd_priv = NULL;
> + ether_addr_copy(dev->perm_addr, dev->dev_addr);
> + ether_addr_copy(dev->dev_addr, addr);
> + vlan->fwd_priv =
> + lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev,
> + dev);
> + /* If we get a NULL pointer back, or if we get an error
> + * then we should restore the old mac address and fwd.
> + */
> + if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
> + ether_addr_copy(dev->dev_addr, dev->perm_addr);
> + vlan->fwd_priv =
> + lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev,
> + dev);
> + return -EINVAL;
> + }
> + return 0;
> + }
Calling del_stations add_station causes all sorts of VMDQ/ring
operations to happen... Not sure if we can do that while we have a live
macvlan/macvtap that is capable of transmitting data.
Wouldn't it be sufficient to have a call to call to update with mac
filter with the appropriate VMDQ.
John, I defer to you here. The above looks really heavy-weight and
I am not sure if its correct.
Thanks
-vlad
> if (!vlan->port->passthru) {
> err = dev_uc_add(lowerdev, addr);
> if (err)
>
next prev parent reply other threads:[~2014-06-09 16:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-07 7:45 [PATCH net-next v2 RESEND 0/4] macvlan: fix some problem if mac address changes Ding Tianhong
2014-06-07 7:45 ` [PATCH net-next v2 RESEND 1/4] macvlan: support mac address changes when fwd_priv is enable Ding Tianhong
2014-06-09 16:51 ` Vlad Yasevich [this message]
2014-06-12 1:45 ` Ding Tianhong
2014-06-12 14:24 ` Vlad Yasevich
2014-06-13 3:10 ` Ding Tianhong
2014-06-13 13:30 ` Vlad Yasevich
2014-06-14 5:01 ` Ding Tianhong
2014-06-07 7:45 ` [PATCH net-next v2 RESEND 2/4] net: dev: revert the mac address when notifier failed Ding Tianhong
2014-06-07 7:45 ` [PATCH net-next v2 RESEND 3/4] macvlan: don't set the same mac address for non-passthru mode Ding Tianhong
2014-06-07 7:45 ` [PATCH net-next v2 RESEND 4/4] net: dev: don't set the same mac address for netdev Ding Tianhong
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