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ipv6: route: dissect flow in input path if fib rules need it

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Dissect flow in fwd path if fib rules require it. Controlled by
a flag to avoid penatly for the common case. Flag is set when fib
rules with sport, dport and proto match that require flow dissect
are installed. Also passes the dissected hash keys to the multipath
hash function when applicable to avoid dissecting the flow again.
icmp packets will continue to use inner header for hash
calculations (Thanks to Nikolay Aleksandrov for some review here).

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
2018-02-28 22:42:41 -05:00
committed by David S. Miller
parent bb0ad1987e
commit e37b1e978b
5 changed files with 65 additions and 16 deletions
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include/net/netns/ipv4.h
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@@ -52,6 +52,7 @@ struct netns_ipv4 {
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rules_ops *rules_ops;
bool fib_has_custom_rules;
unsigned int fib_rules_require_fldissect;
struct fib_table __rcu *fib_main;
struct fib_table __rcu *fib_default;
#endif