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From: David Marchand <david.marchand@redhat.com>
To: Flavio Leitner <fbl@sysclose.org>, Olivier Matz <olivier.matz@6wind.com>
Cc: dev <dev@dpdk.org>, Maxime Coquelin <maxime.coquelin@redhat.com>,
	 Ilya Maximets <i.maximets@ovn.org>,
	Chenbo Xia <chenbo.xia@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2 4/4] vhost: fix offload flags in Rx path
Date: Thu, 29 Apr 2021 21:18:17 +0200
Message-ID: <CAJFAV8xZ5etciYaSVMeMzw_529A-i+d4NiOqORGR5WdMyEaKyA@mail.gmail.com> (raw)
In-Reply-To: <YIr9Y/AQaj5a7a3/@p50.lan>

On Thu, Apr 29, 2021 at 8:39 PM Flavio Leitner <fbl@sysclose.org> wrote:
> > -     if (l4_hdr && hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
> > +     /* GSO request, save required information in mbuf */
> > +     if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
> > +             /* Check unsupported modes */
> > +             if (hdr->gso_size == 0)
> > +                     return -EINVAL;
> > +
> >               switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
> >               case VIRTIO_NET_HDR_GSO_TCPV4:
> >               case VIRTIO_NET_HDR_GSO_TCPV6:
> > -                     tcp_hdr = l4_hdr;
> > -                     m->ol_flags |= PKT_TX_TCP_SEG;
> > -                     m->tso_segsz = hdr->gso_size;
> > -                     m->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
> > -                     break;
> >               case VIRTIO_NET_HDR_GSO_UDP:
> > -                     m->ol_flags |= PKT_TX_UDP_SEG;
> > +                     m->ol_flags |= PKT_RX_LRO | PKT_RX_L4_CKSUM_NONE;
>
> My understanding of the virtio 1.1 spec is that GSO can be
> used independently of CSUM. There is nothing preventing to
> send a fully checksummed TSO packet.

This forces a superfluous cksum in such a situation.
It can be fixed later if needed.

The virtio pmd rx side has the same behavior.


> Anyways, that's unusual and not the goal of this patch.
>
> Acked-by: Flavio Leitner <fbl@sysclose.org>

Thanks!


-- 
David Marchand


  reply	other threads:[~2021-04-29 19:18 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-01  9:52 [dpdk-dev] [PATCH 0/5] Offload flags fixes David Marchand
2021-04-01  9:52 ` [dpdk-dev] [PATCH 1/5] mbuf: mark old offload flag as deprecated David Marchand
2021-04-07 20:14   ` Flavio Leitner
2021-04-08  7:23   ` Olivier Matz
2021-04-08  8:41     ` David Marchand
2021-04-01  9:52 ` [dpdk-dev] [PATCH 2/5] net/tap: do not touch Tx offload flags David Marchand
2021-04-07 20:15   ` Flavio Leitner
2021-04-08  7:41     ` Olivier Matz
2021-04-08 11:21       ` Flavio Leitner
2021-04-08 12:05         ` Olivier Matz
2021-04-08 12:58           ` Flavio Leitner
2021-04-09 13:30             ` Olivier Matz
2021-04-09 16:55               ` Flavio Leitner
2021-04-28 12:17               ` David Marchand
2021-04-08 12:16         ` Ananyev, Konstantin
2021-04-08  7:53   ` Olivier Matz
2021-04-28 12:12     ` David Marchand
2021-04-01  9:52 ` [dpdk-dev] [PATCH 3/5] net/virtio: " David Marchand
2021-04-13 14:17   ` Maxime Coquelin
2021-04-01  9:52 ` [dpdk-dev] [PATCH 4/5] net/virtio: refactor Tx offload helper David Marchand
2021-04-08 13:05   ` Flavio Leitner
2021-04-09  2:31   ` Ruifeng Wang
2021-04-01  9:52 ` [dpdk-dev] [PATCH 5/5] vhost: fix offload flags in Rx path David Marchand
2021-04-08  8:28   ` Olivier Matz
2021-04-08 18:38   ` Flavio Leitner
2021-04-13 15:27     ` Maxime Coquelin
2021-04-27 17:09       ` David Marchand
2021-04-27 17:19         ` David Marchand
2021-04-29  8:04 ` [dpdk-dev] [PATCH v2 0/4] Offload flags fixes David Marchand
2021-04-29  8:04   ` [dpdk-dev] [PATCH v2 1/4] mbuf: mark old offload flag as deprecated David Marchand
2021-04-29 12:14     ` Lance Richardson
2021-04-29 16:45     ` Ajit Khaparde
2021-04-29  8:04   ` [dpdk-dev] [PATCH v2 2/4] net/virtio: do not touch Tx offload flags David Marchand
2021-04-29 13:51     ` Flavio Leitner
2021-04-29  8:04   ` [dpdk-dev] [PATCH v2 3/4] net/virtio: refactor Tx offload helper David Marchand
2021-04-29 12:59     ` Maxime Coquelin
2021-04-29  8:04   ` [dpdk-dev] [PATCH v2 4/4] vhost: fix offload flags in Rx path David Marchand
2021-04-29 13:30     ` Maxime Coquelin
2021-04-29 13:31       ` Maxime Coquelin
2021-04-29 20:21         ` David Marchand
2021-04-30  8:38           ` Maxime Coquelin
2021-04-29 20:09       ` David Marchand
2021-04-29 18:39     ` Flavio Leitner
2021-04-29 19:18       ` David Marchand [this message]
2021-05-03 13:26 ` [dpdk-dev] [PATCH v3 0/4] Offload flags fixes David Marchand
2021-05-03 13:26   ` [dpdk-dev] [PATCH v3 1/4] mbuf: mark old offload flag as deprecated David Marchand
2021-05-03 14:02     ` Maxime Coquelin
2021-05-03 14:12     ` David Marchand
2021-05-03 13:26   ` [dpdk-dev] [PATCH v3 2/4] net/virtio: do not touch Tx offload flags David Marchand
2021-05-03 13:26   ` [dpdk-dev] [PATCH v3 3/4] net/virtio: refactor Tx offload helper David Marchand
2021-05-03 13:26   ` [dpdk-dev] [PATCH v3 4/4] vhost: fix offload flags in Rx path David Marchand
2021-05-03 15:24   ` [dpdk-dev] [PATCH v3 0/4] Offload flags fixes Maxime Coquelin
2021-05-03 16:21     ` David Marchand
2021-05-03 16:43 ` [dpdk-dev] [PATCH v4 0/3] " David Marchand
2021-05-03 16:43   ` [dpdk-dev] [PATCH v4 1/3] net/virtio: do not touch Tx offload flags David Marchand
2021-05-03 16:43   ` [dpdk-dev] [PATCH v4 2/3] net/virtio: refactor Tx offload helper David Marchand
2021-05-03 16:43   ` [dpdk-dev] [PATCH v4 3/3] vhost: fix offload flags in Rx path David Marchand
2021-05-04 11:07     ` Flavio Leitner
2021-05-08  6:24     ` Wang, Yinan
2021-05-12  3:29       ` Wang, Yinan
2021-05-12 15:20         ` David Marchand
2021-05-13  6:34           ` Wang, Yinan
2021-05-04  8:29   ` [dpdk-dev] [PATCH v4 0/3] Offload flags fixes Maxime Coquelin

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