user/sven/linux.git/include/net/route.h, branch v3.8

ipv4: avoid a test in ip_rt_put()

2012-11-03T18:59:04Z

We can save a test in ip_rt_put(), considering dst_release() accepts a NULL parameter, and dst is first element in rtable. Add a BUILD_BUG_ON() to catch any change that could break this assertion. Signed-off-by: Eric Dumazet Cc: Cong Wang Acked-by: Cong Wang Signed-off-by: David S. Miller

ipv4: introduce rt_uses_gateway

2012-10-08T21:42:36Z

Add new flag to remember when route is via gateway. We will use it to allow rt_gateway to contain address of directly connected host for the cases when DST_NOCACHE is used or when the NH exception caches per-destination route without DST_NOCACHE flag, i.e. when routes are not used for other destinations. By this way we force the neighbour resolving to work with the routed destination but we can use different address in the packet, feature needed for IPVS-DR where original packet for virtual IP is routed via route to real IP. Signed-off-by: Julian Anastasov Signed-off-by: David S. Miller

ipv4/route: arg delay is useless in rt_cache_flush()

2012-09-18T19:44:34Z

Since route cache deletion (89aef8921bfbac22f), delay is no more used. Remove it. Signed-off-by: Nicolas Dichtel Acked-by: Eric Dumazet Signed-off-by: David S. Miller

ipv4: Properly purge netdev references on uncached routes.

2012-07-31T22:06:50Z

When a device is unregistered, we have to purge all of the references to it that may exist in the entire system. If a route is uncached, we currently have no way of accomplishing this. So create a global list that is scanned when a network device goes down. This mirrors the logic in net/core/dst.c's dst_ifdown(). Signed-off-by: David S. Miller

ipv4: Fix input route performance regression.

2012-07-26T22:50:39Z

With the routing cache removal we lost the "noref" code paths on input, and this can kill some routing workloads. Reinstate the noref path when we hit a cached route in the FIB nexthops. With help from Eric Dumazet. Reported-by: Alexander Duyck Signed-off-by: David S. Miller Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller

ipv4: Change rt->rt_iif encoding.

2012-07-23T23:36:27Z

On input packet processing, rt->rt_iif will be zero if we should use skb->dev->ifindex. Since we access rt->rt_iif consistently via inet_iif(), that is the only spot whose interpretation have to adjust. Signed-off-by: David S. Miller

ipv4: Kill rt->fi

2012-07-20T20:40:07Z

It's not really needed. We only grabbed a reference to the fib_info for the sake of fib_info local metrics. However, fib_info objects are freed using RCU, as are therefore their private metrics (if any). We would have triggered a route cache flush if we eliminated a reference to a fib_info object in the routing tables. Therefore, any existing cached routes will first check and see that they have been invalidated before an errant reference to these metric values would occur. Signed-off-by: David S. Miller

ipv4: Turn rt->rt_route_iif into rt->rt_is_input.

2012-07-20T20:40:02Z

That is this value's only use, as a boolean to indicate whether a route is an input route or not. So implement it that way, using a u16 gap present in the struct already. Signed-off-by: David S. Miller

ipv4: Kill rt->rt_oif

2012-07-20T20:38:34Z

Never actually used. It was being set on output routes to the original OIF specified in the flow key used for the lookup. Adjust the only user, ipmr_rt_fib_lookup(), for greater correctness of the flowi4_oif and flowi4_iif values, thanks to feedback from Julian Anastasov. Signed-off-by: David S. Miller

ipv4: Adjust semantics of rt->rt_gateway.

2012-07-20T20:31:20Z

In order to allow prefixed routes, we have to adjust how rt_gateway is set and interpreted. The new interpretation is: 1) rt_gateway == 0, destination is on-link, nexthop is iph->daddr 2) rt_gateway != 0, destination requires a nexthop gateway Abstract the fetching of the proper nexthop value using a new inline helper, rt_nexthop(), as suggested by Joe Perches. Signed-off-by: David S. Miller Tested-by: Vijay Subramanian