From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamal Hadi Salim Subject: Re: [PATCH 2/3] bridge: offload bridge port attributes to switch asic if feature flag set Date: Fri, 05 Dec 2014 07:07:05 -0500 Message-ID: <54819FE9.6030801@mojatatu.com> References: <1417746401-8140-3-git-send-email-roopa@cumulusnetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, davem@davemloft.net, shm@cumulusnetworks.com, gospo@cumulusnetworks.com To: roopa@cumulusnetworks.com, jiri@resnulli.us, sfeldma@gmail.com, bcrl@kvack.org, tgraf@suug.ch, john.fastabend@gmail.com, stephen@networkplumber.org, linville@tuxdriver.com, nhorman@tuxdriver.com, nicolas.dichtel@6wind.com, vyasevic@redhat.com, f.fainelli@gmail.com, buytenh@wantstofly.org, aviadr@mellanox.com Return-path: Received: from mail-ie0-f172.google.com ([209.85.223.172]:49849 "EHLO mail-ie0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750800AbaLEMHJ (ORCPT ); Fri, 5 Dec 2014 07:07:09 -0500 Received: by mail-ie0-f172.google.com with SMTP id tr6so545134ieb.31 for ; Fri, 05 Dec 2014 04:07:08 -0800 (PST) In-Reply-To: <1417746401-8140-3-git-send-email-roopa@cumulusnetworks.com> Sender: netdev-owner@vger.kernel.org List-ID: On 12/04/14 21:26, roopa@cumulusnetworks.com wrote: > From: Roopa Prabhu > Ok, so this one maintains status quo. Looks reasonable to me. cheers, jamal > This allows offloading to switch asic without having the user to set > any flag. And this is done in the bridge driver to rollback kernel settings > on hw offload failure if required in the future. > > With this, it also makes sure a notification goes out only after the > attributes are set both in the kernel and hw. > --- > net/bridge/br_netlink.c | 27 ++++++++++++++++++++++++++- > 1 file changed, 26 insertions(+), 1 deletion(-) > > diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c > index 9f5eb55..ce173f0 100644 > --- a/net/bridge/br_netlink.c > +++ b/net/bridge/br_netlink.c > @@ -407,9 +407,21 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) > afspec, RTM_SETLINK); > } > > + if ((dev->features & NETIF_F_HW_SWITCH_OFFLOAD) && > + dev->netdev_ops->ndo_bridge_setlink) { > + int ret = dev->netdev_ops->ndo_bridge_setlink(dev, nlh); > + if (ret && ret != -EOPNOTSUPP) { > + /* XXX Fix this in the future to rollback > + * kernel settings and return error > + */ > + br_warn(p->br, "error offloading bridge attributes " > + "on port %u(%s)\n", (unsigned int) p->port_no, > + p->dev->name); > + } > + } > + > if (err == 0) > br_ifinfo_notify(RTM_NEWLINK, p); > - > out: > return err; > } > @@ -433,6 +445,19 @@ int br_dellink(struct net_device *dev, struct nlmsghdr *nlh) > err = br_afspec((struct net_bridge *)netdev_priv(dev), p, > afspec, RTM_DELLINK); > > + if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD > + && dev->netdev_ops->ndo_bridge_setlink) { > + int ret = dev->netdev_ops->ndo_bridge_dellink(dev, nlh); > + if (ret && ret != -EOPNOTSUPP) { > + /* XXX Fix this in the future to rollback > + * kernel settings and return error > + */ > + br_warn(p->br, "error offloading bridge attributes " > + "on port %u(%s)\n", (unsigned int) p->port_no, > + p->dev->name); > + } > + } > + > return err; > } > static int br_validate(struct nlattr *tb[], struct nlattr *data[]) >