From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Samudrala, Sridhar" Subject: Re: [PATCH net 2/2] net: cls_u32: be more strict about skip-sw flag Date: Mon, 06 Jun 2016 10:25:57 -0700 Message-ID: <5755B225.7040600@intel.com> References: <1465226208-32097-1-git-send-email-jakub.kicinski@netronome.com> <1465226208-32097-3-git-send-email-jakub.kicinski@netronome.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: john.r.fastabend@intel.com To: Jakub Kicinski , netdev@vger.kernel.org Return-path: Received: from mga01.intel.com ([192.55.52.88]:34103 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751772AbcFFR0Y (ORCPT ); Mon, 6 Jun 2016 13:26:24 -0400 In-Reply-To: <1465226208-32097-3-git-send-email-jakub.kicinski@netronome.com> Sender: netdev-owner@vger.kernel.org List-ID: On 6/6/2016 8:16 AM, Jakub Kicinski wrote: > Return an error if user requested skip-sw and the underlaying > hardware cannot handle tc offloads (or offloads are disabled). > > Signed-off-by: Jakub Kicinski looks good. I think we need similar checks in u32_replace_hw_knode() too. > --- > net/sched/cls_u32.c | 21 +++++++++++---------- > 1 file changed, 11 insertions(+), 10 deletions(-) > > diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c > index b17e090f2fe1..fe05449537a3 100644 > --- a/net/sched/cls_u32.c > +++ b/net/sched/cls_u32.c > @@ -457,20 +457,21 @@ static int u32_replace_hw_hnode(struct tcf_proto *tp, > struct tc_to_netdev offload; > int err; > > + if (!tc_should_offload(dev, flags)) > + return tc_skip_sw(flags) ? -EINVAL : 0; > + > offload.type = TC_SETUP_CLSU32; > offload.cls_u32 = &u32_offload; > > - if (tc_should_offload(dev, flags)) { > - offload.cls_u32->command = TC_CLSU32_NEW_HNODE; > - offload.cls_u32->hnode.divisor = h->divisor; > - offload.cls_u32->hnode.handle = h->handle; > - offload.cls_u32->hnode.prio = h->prio; > + offload.cls_u32->command = TC_CLSU32_NEW_HNODE; > + offload.cls_u32->hnode.divisor = h->divisor; > + offload.cls_u32->hnode.handle = h->handle; > + offload.cls_u32->hnode.prio = h->prio; > > - err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, > - tp->protocol, &offload); > - if (tc_skip_sw(flags)) > - return err; > - } > + err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, > + tp->protocol, &offload); > + if (tc_skip_sw(flags)) > + return err; > > return 0; > }