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netdev-dpdk: Disable net/tap Tx L4 checksum offloads.

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As reported by Ales when doing some OVN integration tests with OVS 3.2,
net/tap has broken L4 checksum offloads.

Fixes are pending on DPDK side.
Until they get in a LTS release used by OVS, disable those Tx offloads.

Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
David Marchand
2023-08-30 10:28:16 +02:00
committed by Ilya Maximets
parent 13b874f4fe
commit bb61931dc5
1 changed files with 10 additions and 0 deletions
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10
lib/netdev-dpdk.c
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@@ -1312,6 +1312,16 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev)
dev->hw_ol_features &= ~NETDEV_RX_HW_SCATTER;
}
if (!strcmp(info.driver_name, "net_tap")) {
/* FIXME: L4 checksum offloading is broken in DPDK net/tap driver.
* This workaround can be removed once the fix makes it to a DPDK
* LTS release used by OVS. */
VLOG_INFO("%s: disabled Tx L4 checksum offloads for a net/tap port.",
netdev_get_name(&dev->up));
info.tx_offload_capa &= ~RTE_ETH_TX_OFFLOAD_UDP_CKSUM;
info.tx_offload_capa &= ~RTE_ETH_TX_OFFLOAD_TCP_CKSUM;
}
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) {
dev->hw_ol_features |= NETDEV_TX_IPV4_CKSUM_OFFLOAD;
} else {