From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 34021A0679 for ; Mon, 1 Apr 2019 22:17:22 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 0C0C53798; Mon, 1 Apr 2019 22:17:22 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 98F42378B; Mon, 1 Apr 2019 22:17:19 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Apr 2019 13:17:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,297,1549958400"; d="scan'208";a="334039799" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by fmsmga005.fm.intel.com with ESMTP; 01 Apr 2019 13:17:16 -0700 To: Chas Williams <3chas3@gmail.com>, dev@dpdk.org, olivier.matz@6wind.com Cc: stable@dpdk.org, Chas Williams , Andrew Rybchenko References: <20190325150541.12087-1-3chas3@gmail.com> <23cc0c89-0333-3300-6acb-e69d8d56c811@intel.com> <9b0d3a56-4941-dfb4-5702-fb09e913cf96@gmail.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <9b0d3a56-4941-dfb4-5702-fb09e913cf96@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] net: fix Tx VLAN flag for offload emulation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190401201716.aCnWcZcQwWZrwQFrASaNUeLZhs4SlXjJEoj_Fl76x8Q@z> On 3/26/2019 6:01 PM, Chas Williams wrote: > > > On 3/26/19 12:50 PM, Ferruh Yigit wrote: >> On 3/25/2019 3:05 PM, Chas Williams wrote: >>> From: Bill Hong >>> >>> A PMD might use rte_vlan_insert to implement Tx VLAN offload. Typically >>> the PMD will insert the VLAN header in the transmit path and then attempt >>> to send the packets. If this fails, the packets are returned to >>> the application which may attempt to send these packets again. If the >>> PKT_TX_VLAN flag is not cleared, the transmit path may attempt to insert >>> the VLAN header again. >>> >>> Fixes: 47aa48b969f8 ("net: fix stripped VLAN flag for offload emulation"); >>> Cc: stable@dpdk.org >>> >>> Signed-off-by: Bill Hong >>> Signed-off-by: Chas Williams >>> --- >>> lib/librte_net/rte_ether.h | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/lib/librte_net/rte_ether.h b/lib/librte_net/rte_ether.h >>> index c2c5e249f..e0d831113 100644 >>> --- a/lib/librte_net/rte_ether.h >>> +++ b/lib/librte_net/rte_ether.h >>> @@ -408,7 +408,7 @@ static inline int rte_vlan_insert(struct rte_mbuf **m) >>> vh = (struct vlan_hdr *) (nh + 1); >>> vh->vlan_tci = rte_cpu_to_be_16((*m)->vlan_tci); >>> >>> - (*m)->ol_flags &= ~PKT_RX_VLAN_STRIPPED; >>> + (*m)->ol_flags &= ~(PKT_RX_VLAN_STRIPPED | PKT_TX_VLAN); >> >> Hi Chas, >> >> Looks reasonable, AFAIK, PKT_TX_VLAN flag means 'mbuf->vlan_tci' has valid value >> and a request from application to driver to insert VLAN information. >> After successful insertion flag can be removed. >> >> But in mbuf header, flags documented as: >> PKT_TX_VLAN: TX packet is a 802.1q VLAN packet. >> PKT_TX_QINQ: TX packet with double VLAN inserted. Hi Olivier, Any comment on them, should they be fixed? > > Note the usage slightly below: > > /** > * Bitmask of all supported packet Tx offload features flags, > * which can be set for packet. > */ > #define PKT_TX_OFFLOAD_MASK ( \ > PKT_TX_OUTER_IPV6 | \ > PKT_TX_OUTER_IPV4 | \ > PKT_TX_OUTER_IP_CKSUM | \ > PKT_TX_VLAN_PKT | \ > > So this implies that PKT_TX_VLAN_PKT (which is PKT_TX_VLAN's old name) > is an offload feature, not that the actual packet has an 802.1q header > (offloaded or otherwise). > > The same seems to apply for PKT_TX_QINQ. Agree, I just would like to confirm, so lgtm: Reviewed-by: Ferruh Yigit > >> Hi Oliver, >> >> Is above comments correct, or I am missing something J >> >> >> Also here cleaning 'PKT_RX_VLAN_STRIPPED' looks like to say 'vlan' information >> is not stripped but in the packet data, but 'RX' in this context can be >> confusing, should we have a more generic 'PKT_VLAN_STRIPPED' ? >>