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| author | David Ahern <dsahern@gmail.com> | 2018-03-02 19:32:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-04 21:04:21 +0300 |
| commit | ec7127a5d53d891b77a11433026dca72c57eaf88 (patch) | |
| tree | 204ea63717d6ca9e0435fa86caf57ca068094df0 /net/ipv4/route.c | |
| parent | 6f74b6c259158d89ad258cda8e86240e01052884 (diff) | |
| download | linux-ec7127a5d53d891b77a11433026dca72c57eaf88.tar.xz | |
net/ipv4: Simplify fib_multipath_hash with optional flow keys
As of commit e37b1e978bec5 ("ipv6: route: dissect flow in input path if
fib rules need it") fib_multipath_hash takes an optional flow keys. If
non-NULL it means the skb has already been dissected. If not set, then
fib_multipath_hash needs to call skb_flow_dissect_flow_keys.
Simplify the logic by setting flkeys to the local stack variable keys.
Simplifies fib_multipath_hash by only have 1 set of instructions
setting hash_keys.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index df57bc68e8e0..6a7b3cba3972 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1810,24 +1810,20 @@ int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4, /* short-circuit if we already have L4 hash present */ if (skb->l4_hash) return skb_get_hash_raw(skb) >> 1; + memset(&hash_keys, 0, sizeof(hash_keys)); - if (flkeys) { - 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; - hash_keys.ports.src = flkeys->ports.src; - hash_keys.ports.dst = flkeys->ports.dst; - hash_keys.basic.ip_proto = flkeys->basic.ip_proto; - } else { + if (!flkeys) { skb_flow_dissect_flow_keys(skb, &keys, flag); - hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; - hash_keys.addrs.v4addrs.src = keys.addrs.v4addrs.src; - hash_keys.addrs.v4addrs.dst = keys.addrs.v4addrs.dst; - hash_keys.ports.src = keys.ports.src; - hash_keys.ports.dst = keys.ports.dst; - hash_keys.basic.ip_proto = keys.basic.ip_proto; + flkeys = &keys; } + + 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; + hash_keys.ports.src = flkeys->ports.src; + hash_keys.ports.dst = flkeys->ports.dst; + hash_keys.basic.ip_proto = flkeys->basic.ip_proto; } else { memset(&hash_keys, 0, sizeof(hash_keys)); hash_keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; |