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net: flow: Add l3mdev flow update

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Add l3mdev hook to set FLOWI_FLAG_SKIP_NH_OIF flag and update oif/iif
in flow struct if its oif or iif points to a device enslaved to an L3
Master device. Only 1 needs to be converted to match the l3mdev FIB
rule. This moves the flow adjustment for l3mdev to a single point
catching all lookups. It is redundant for existing hooks (those are
removed in later patches) but is needed for missed lookups such as
PMTU updates.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2016-09-10 12:09:52 -07:00
committed by David S. Miller
parent cf9932a941
commit 9ee0034b8f
4 changed files with 47 additions and 0 deletions
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6
include/net/l3mdev.h
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@@ -49,6 +49,8 @@ struct l3mdev_ops {
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
struct fib_lookup_arg *arg);
void l3mdev_update_flow(struct net *net, struct flowi *fl);
int l3mdev_master_ifindex_rcu(const struct net_device *dev);
static inline int l3mdev_master_ifindex(struct net_device *dev)
{
@@ -290,6 +292,10 @@ int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
{
return 1;
}
static inline
void l3mdev_update_flow(struct net *net, struct flowi *fl)
{
}
#endif
#endif /* _NET_L3MDEV_H_ */