[Patch v2] net/netvsc: fix the calculation of checksums based on mbuf flag
longli at linuxonhyperv.com
longli at linuxonhyperv.com
Thu Mar 24 18:46:08 CET 2022
From: Long Li <longli at microsoft.com>
The netvsc should use RTE_MBUF_F_TX_L4_MASK and check the masked value to
decide the correct way to calculate checksums.
Not checking for RTE_MBUF_F_TX_L4_MASK results in incorrect RNDIS packets
sent to VSP and incorrect checksums calculated by the VSP.
Fixes: 4e9c73e96e ("net/netvsc: add Hyper-V network device")
Cc: stable at dpdk.org
Signed-off-by: Long Li <longli at microsoft.com>
---
drivers/net/netvsc/hn_rxtx.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
index 028f176c7e..34f40be5b8 100644
--- a/drivers/net/netvsc/hn_rxtx.c
+++ b/drivers/net/netvsc/hn_rxtx.c
@@ -1348,8 +1348,11 @@ static void hn_encap(struct rndis_packet_msg *pkt,
*pi_data = NDIS_LSO2_INFO_MAKEIPV4(hlen,
m->tso_segsz);
}
- } else if (m->ol_flags &
- (RTE_MBUF_F_TX_TCP_CKSUM | RTE_MBUF_F_TX_UDP_CKSUM | RTE_MBUF_F_TX_IP_CKSUM)) {
+ } else if ((m->ol_flags & RTE_MBUF_F_TX_L4_MASK) ==
+ RTE_MBUF_F_TX_TCP_CKSUM ||
+ (m->ol_flags & RTE_MBUF_F_TX_L4_MASK) ==
+ RTE_MBUF_F_TX_UDP_CKSUM ||
+ (m->ol_flags & RTE_MBUF_F_TX_IP_CKSUM)) {
pi_data = hn_rndis_pktinfo_append(pkt, NDIS_TXCSUM_INFO_SIZE,
NDIS_PKTINFO_TYPE_CSUM);
*pi_data = 0;
@@ -1363,9 +1366,11 @@ static void hn_encap(struct rndis_packet_msg *pkt,
*pi_data |= NDIS_TXCSUM_INFO_IPCS;
}
- if (m->ol_flags & RTE_MBUF_F_TX_TCP_CKSUM)
+ if ((m->ol_flags & RTE_MBUF_F_TX_L4_MASK) ==
+ RTE_MBUF_F_TX_TCP_CKSUM)
*pi_data |= NDIS_TXCSUM_INFO_MKTCPCS(hlen);
- else if (m->ol_flags & RTE_MBUF_F_TX_UDP_CKSUM)
+ else if ((m->ol_flags & RTE_MBUF_F_TX_L4_MASK) ==
+ RTE_MBUF_F_TX_UDP_CKSUM)
*pi_data |= NDIS_TXCSUM_INFO_MKUDPCS(hlen);
}
--
2.32.0
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