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net/virtio: do not touch Tx offload flags

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Tx offload flags are of the application responsibility.
Leave the mbuf alone and use a local storage for implicit tcp checksum
offloading in case of TSO.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
This commit is contained in:
David Marchand 2021-05-03 18:43:42 +02:00 committed by Maxime Coquelin
parent 99f9d799ce
commit 004d8e854a
1 changed files with 5 additions and 3 deletions
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8
drivers/net/virtio/virtqueue.h
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@ -622,10 +622,12 @@ virtqueue_xmit_offload(struct virtio_net_hdr *hdr,
uint8_t offload)
{
if (offload) {
if (cookie->ol_flags & PKT_TX_TCP_SEG)
cookie->ol_flags |= PKT_TX_TCP_CKSUM;
uint64_t csum_l4 = cookie->ol_flags & PKT_TX_L4_MASK;
switch (cookie->ol_flags & PKT_TX_L4_MASK) {
if (cookie->ol_flags & PKT_TX_TCP_SEG)
csum_l4 |= PKT_TX_TCP_CKSUM;
switch (csum_l4) {
case PKT_TX_UDP_CKSUM:
hdr->csum_start = cookie->l2_len + cookie->l3_len;
hdr->csum_offset = offsetof(struct rte_udp_hdr,