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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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5
lib/odp-execute.c
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@@ -136,7 +136,8 @@ odp_execute_set_action(struct dpif_packet *packet, const struct nlattr *a,
break;
case OVS_KEY_ATTR_DP_HASH:
packet->dp_hash = md->dp_hash = nl_attr_get_u32(a);
md->dp_hash = nl_attr_get_u32(a);
dpif_packet_set_dp_hash(packet, md->dp_hash);
break;
case OVS_KEY_ATTR_RECIRC_ID:
@@ -251,7 +252,7 @@ odp_execute_actions__(void *dp, struct dpif_packet **packets, int cnt,
}
/* We also store the hash value with each packet */
packets[i]->dp_hash = hash ? hash : 1;
dpif_packet_set_dp_hash(packets[i], hash ? hash : 1);
}
} else {
/* Assert on unknown hash algorithm. */