[dpdk-dev] [PATCH] net/vhost: restore pseudo TSO support

[David Marchand <david.marchand@redhat.com>]

The net/vhost pmd does not comply with the ethdev offload API as it does
not report rx/tx offload capabilities wrt TSO and checksum offloading.
On the other hand, the net/vhost pmd lets guest negotiates TSO and
checksum offloading.

Changing the behavior for rx/tx offload flags handling won't
improve/fix this situation and will break applications that might have
been relying on implicit support of TSO in this driver.

Revert this behavior change until we have a complete fix.

Fixes: ca7036b4af3a ("vhost: fix offload flags in Rx path")

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
The full fix requires:
- reporting rx/tx_offload_capa,
- supporting sw TSO and checksums for the case when a virtual machine
  negotiates this feature, but the application does not configure
  DEV_[RT]X_OFFLOAD_* appropriate flags,

---
 drivers/net/vhost/rte_eth_vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index 8524898661..a202931e9a 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -1505,7 +1505,7 @@ rte_pmd_vhost_probe(struct rte_vdev_device *dev)
 	int ret = 0;
 	char *iface_name;
 	uint16_t queues;
-	uint64_t flags = RTE_VHOST_USER_NET_COMPLIANT_OL_FLAGS;
+	uint64_t flags = 0;
 	uint64_t disable_flags = 0;
 	int client_mode = 0;
 	int iommu_support = 0;
-- 
2.23.0