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| author | Stephen Suryaputra <ssuryaextr@gmail.com> | 2019-07-06 10:55:18 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-08 16:37:29 -0700 |
| commit | d8f74f0975d8360ab15312697585837c989c406b (patch) | |
| tree | 16d61f67418e58f9336940beb282a0e6000ed14e | |
| parent | 828b2b442145cbe94fe3ca0e34a47f64b0f322ef (diff) | |
| download | linux-d8f74f0975d8360ab15312697585837c989c406b.tar.gz linux-d8f74f0975d8360ab15312697585837c989c406b.tar.bz2 linux-d8f74f0975d8360ab15312697585837c989c406b.zip | |
ipv6: Support multipath hashing on inner IP pkts
Make the same support as commit 363887a2cdfe ("ipv4: Support multipath
hashing on inner IP pkts for GRE tunnel") for outer IPv6. The hashing
considers both IPv4 and IPv6 pkts when they are tunneled by IPv6 GRE.
Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 1 | ||||
| -rw-r--r-- | net/ipv6/route.c | 36 |
2 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index f0e6d1f53485..48c79e78817b 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -1473,6 +1473,7 @@ fib_multipath_hash_policy - INTEGER Possible values: 0 - Layer 3 (source and destination addresses plus flow label) 1 - Layer 4 (standard 5-tuple) + 2 - Layer 3 or inner Layer 3 if present anycast_src_echo_reply - BOOLEAN Controls the use of anycast addresses as source addresses for ICMPv6 diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 39361f57351a..4d2e6b31a8d6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2370,6 +2370,42 @@ u32 rt6_multipath_hash(const struct net *net, const struct flowi6 *fl6, hash_keys.basic.ip_proto = fl6->flowi6_proto; } break; + case 2: + memset(&hash_keys, 0, sizeof(hash_keys)); + hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; + if (skb) { + struct flow_keys keys; + + if (!flkeys) { + skb_flow_dissect_flow_keys(skb, &keys, 0); + flkeys = &keys; + } + + /* Inner can be v4 or v6 */ + if (flkeys->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { + hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; + hash_keys.addrs.v4addrs.src = flkeys->addrs.v4addrs.src; + hash_keys.addrs.v4addrs.dst = flkeys->addrs.v4addrs.dst; + } else if (flkeys->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { + hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; + hash_keys.addrs.v6addrs.src = flkeys->addrs.v6addrs.src; + hash_keys.addrs.v6addrs.dst = flkeys->addrs.v6addrs.dst; + hash_keys.tags.flow_label = flkeys->tags.flow_label; + hash_keys.basic.ip_proto = flkeys->basic.ip_proto; + } else { + /* Same as case 0 */ + hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; + ip6_multipath_l3_keys(skb, &hash_keys, flkeys); + } + } else { + /* Same as case 0 */ + hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; + hash_keys.addrs.v6addrs.src = fl6->saddr; + hash_keys.addrs.v6addrs.dst = fl6->daddr; + hash_keys.tags.flow_label = (__force u32)flowi6_get_flowlabel(fl6); + hash_keys.basic.ip_proto = fl6->flowi6_proto; + } + break; } mhash = flow_hash_from_keys(&hash_keys); |