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charset=us-ascii Content-Disposition: inline In-Reply-To: <39a8a8bb-d246-3377-607c-3c2387b73fe0@oktetlabs.ru> Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH 1/4] net/tap: fix Rx cksum flags on IP options packets X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 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" Hi Ferruh, Andrew, On Tue, Jun 08, 2021 at 01:13:59PM +0300, Andrew Rybchenko wrote: > On 4/30/21 5:48 PM, Ferruh Yigit wrote: > > On 4/27/2021 2:57 PM, Olivier Matz wrote: > >> When packet type is IPV4_EXT, the checksum is always marked as good in > >> the mbuf offload flags. > >> > >> Since we know the header lengths, we can easily call > >> rte_ipv4_udptcp_cksum() in this case too. > >> > >> Fixes: 8ae3023387e9 ("net/tap: add Rx/Tx checksum offload support") > >> Cc: stable@dpdk.org > >> > >> Signed-off-by: Olivier Matz > >> --- > >> drivers/net/tap/rte_eth_tap.c | 4 ++-- > >> 1 file changed, 2 insertions(+), 2 deletions(-) > >> > >> diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c > >> index 68baa18523..e7b185a4b5 100644 > >> --- a/drivers/net/tap/rte_eth_tap.c > >> +++ b/drivers/net/tap/rte_eth_tap.c > >> @@ -350,7 +350,7 @@ tap_verify_csum(struct rte_mbuf *mbuf) > >> /* Don't verify checksum for multi-segment packets. */ > >> if (mbuf->nb_segs > 1) > >> return; > >> - if (l3 == RTE_PTYPE_L3_IPV4) { > >> + if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) { > > > > Should we take 'RTE_PTYPE_L3_IPV4_EXT_UNKNOWN' into account? > > I think we should. I think 'RTE_PTYPE_L3_IPV4_EXT_UNKNOWN' cannot happen here: - mbuf->packet_type is generated by rte_net_get_ptype(), which cannot return 'RTE_PTYPE_L3_IPV4_EXT_UNKNOWN' - right above this code, we already returned if l3 is not in (RTE_PTYPE_L3_IPV4, RTE_PTYPE_L3_IPV4_EXT, RTE_PTYPE_L3_IPV6) > > > >> if (l4 == RTE_PTYPE_L4_UDP) { > >> udp_hdr = (struct rte_udp_hdr *)l4_hdr; > >> if (udp_hdr->dgram_cksum == 0) { > >> @@ -364,7 +364,7 @@ tap_verify_csum(struct rte_mbuf *mbuf) > >> } > >> } > >> cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr); > >> - } else if (l3 == RTE_PTYPE_L3_IPV6) { > >> + } else { /* l3 == RTE_PTYPE_L3_IPV6, checked above */ > >> cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr); > >> } > >> mbuf->ol_flags |= cksum ? > >> >