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dpif-netdev: Check for PKT_RX_RSS_HASH flag.

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DPDK mbufs contain a valid RSS hash only if PKT_RX_RSS_HASH is
set in 'ol_flags'.  Otherwise the hash is garbage and doesn't
relate to the packet.

This fixes an issue with vhost, which, being a virtual NIC, doesn't
compute the hash.

Reported-by: Dongjun <dongj@dtdream.com>
Suggested-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Kevin Traynor <kevin.traynor@intel.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
This commit is contained in:
Daniele Di Proietto
2015-06-16 19:16:24 +01:00
parent 8f96455dda
commit f2f44f5da0
6 changed files with 32 additions and 6 deletions
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2
lib/netdev-dpdk.c
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@@ -2001,7 +2001,7 @@ netdev_dpdk_ring_send(struct netdev *netdev_, int qid,
* the consumer of the ring and return into the datapath without recalculating
* the RSS hash. */
for (i = 0; i < cnt; i++) {
dp_packet_set_rss_hash(pkts[i], 0);
dp_packet_rss_invalidate(pkts[i]);
}
netdev_dpdk_send__(netdev, qid, pkts, cnt, may_steal);