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packet-dpif: Add dpif_packet_{get, set}_hash()

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These function are used to stored the packet hash. 'netdev-dpdk'
automatically set this value to the RSS hash returned by the
NIC. Other 'netdev's set it to 0 (which is an invalid hash
value), so that callers can compute the hash on their own.

If DPDK support is enabled, struct dpif_packet's member
'dp_hash' is removed and 'pkt.hash.rss' from DPDK mbuf is used

This commit also configure DPDK devices to compute RSS hash
for UDP and IPv6 packets

Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Daniele Di Proietto
2014-08-29 16:06:42 -07:00
committed by Pravin B Shelar
parent 9230662a87
commit 61a2647e15
8 changed files with 31 additions and 5 deletions
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2
lib/dpif-netdev.c
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@@ -2221,7 +2221,7 @@ dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
recirc_md.recirc_id = nl_attr_get_u32(a);
/* Hash is private to each packet */
recirc_md.dp_hash = packets[i]->dp_hash;
recirc_md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
dp_netdev_input(dp, &recirc_pkt, 1, &recirc_md);
}