user/sven/linux.git/include/net/ip6_fib.h, branch v4.4.12

ipv6: Check rt->dst.from for the DST_NOCACHE route

2015-11-15T22:12:37Z

All DST_NOCACHE rt6_info used to have rt->dst.from set to its parent. After commit 8e3d5be73681 ("ipv6: Avoid double dst_free"), DST_NOCACHE is also set to rt6_info which does not have a parent (i.e. rt->dst.from is NULL). This patch catches the rt->dst.from == NULL case. Fixes: 8e3d5be73681 ("ipv6: Avoid double dst_free") Signed-off-by: Martin KaFai Lau Cc: Hannes Frederic Sowa Signed-off-by: David S. Miller

ipv6: include NLM_F_REPLACE in route replace notifications

2015-09-17T22:00:27Z

This patch adds NLM_F_REPLACE flag to ipv6 route replace notifications. This makes nlm_flags in ipv6 replace notifications consistent with ipv4. Signed-off-by: Roopa Prabhu Acked-by: Nicolas Dichtel Reviewed-by: Michal Kubecek Signed-off-by: David S. Miller

route: move lwtunnel state to dst_entry

2015-08-20T22:42:36Z

Currently, the lwtunnel state resides in per-protocol data. This is a problem if we encapsulate ipv6 traffic in an ipv4 tunnel (or vice versa). The xmit function of the tunnel does not know whether the packet has been routed to it by ipv4 or ipv6, yet it needs the lwtstate data. Moving the lwtstate data to dst_entry makes such inter-protocol tunneling possible. As a bonus, this brings a nice diffstat. Signed-off-by: Jiri Benc Acked-by: Roopa Prabhu Acked-by: Thomas Graf Signed-off-by: David S. Miller

ipv6: support for fib route lwtunnel encap attributes

2015-07-21T17:39:04Z

This patch adds support in ipv6 fib functions to parse Netlink RTA encap attributes and attach encap state data to rt6_info. Signed-off-by: Roopa Prabhu Signed-off-by: David S. Miller

ipv6: Create percpu rt6_info

2015-05-25T17:25:35Z

After the patch 'ipv6: Only create RTF_CACHE routes after encountering pmtu exception', we need to compensate the performance hit (bouncing dst->__refcnt). Signed-off-by: Martin KaFai Lau Cc: Hannes Frederic Sowa Cc: Steffen Klassert Cc: Julian Anastasov Signed-off-by: David S. Miller

ipv6: Keep track of DST_NOCACHE routes in case of iface down/unregister

2015-05-25T17:25:34Z

This patch keeps track of the DST_NOCACHE routes in a list and replaces its dev with loopback during the iface down/unregister event. Signed-off-by: Martin KaFai Lau Cc: Hannes Frederic Sowa Cc: Steffen Klassert Cc: Julian Anastasov Signed-off-by: David S. Miller

ipv6: Create RTF_CACHE clone when FLOWI_FLAG_KNOWN_NH is set

2015-05-25T17:25:34Z

This patch always creates RTF_CACHE clone with DST_NOCACHE when FLOWI_FLAG_KNOWN_NH is set so that the rt6i_dst is set to the fl6->daddr. Signed-off-by: Martin KaFai Lau Acked-by: Julian Anastasov Tested-by: Julian Anastasov Cc: Hannes Frederic Sowa Cc: Steffen Klassert Signed-off-by: David S. Miller

ipv6: Add rt6_get_cookie() function

2015-05-25T17:25:34Z

Instead of doing the rt6->rt6i_node check whenever we need to get the route's cookie. Refactor it into rt6_get_cookie(). It is a prep work to handle FLOWI_FLAG_KNOWN_NH and also percpu rt6_info later. Signed-off-by: Martin KaFai Lau Cc: Hannes Frederic Sowa Cc: Steffen Klassert Cc: Julian Anastasov Signed-off-by: David S. Miller

ipv6: Remove DST_METRICS_FORCE_OVERWRITE and _rt6i_peer

2015-05-02T00:57:06Z

_rt6i_peer is no longer needed after the last patch, 'ipv6: Stop rt6_info from using inet_peer's metrics'. DST_METRICS_FORCE_OVERWRITE is added by commit e5fd387ad5b3 ("ipv6: do not overwrite inetpeer metrics prematurely"). Since inetpeer is no longer used for metrics, this bit is also not needed. Signed-off-by: Martin KaFai Lau Reviewed-by: Hannes Frederic Sowa Cc: Michal Kubeček Cc: Steffen Klassert Signed-off-by: David S. Miller

ipv6: Stop rt6_info from using inet_peer's metrics

2015-05-02T00:57:06Z

inet_peer is indexed by the dst address alone. However, the fib6 tree could have multiple routing entries (rt6_info) for the same dst. For example, 1. A /128 dst via multiple gateways. 2. A RTF_CACHE route cloned from a /128 route. In the above cases, all of them will share the same metrics and step on each other. This patch will steer away from inet_peer's metrics and use dst_cow_metrics_generic() for everything. Change Highlights: 1. Remove rt6_cow_metrics() which currently acquires metrics from inet_peer for DST_HOST route (i.e. /128 route). 2. Add rt6i_pmtu to take care of the pmtu update to avoid creating a full size metrics just to override the RTAX_MTU. 3. After (2), the RTF_CACHE route can also share the metrics with its dst.from route, by: dst_init_metrics(&cache_rt->dst, dst_metrics_ptr(cache_rt->dst.from), true); 4. Stop creating RTF_CACHE route by cloning another RTF_CACHE route. Instead, directly clone from rt->dst. [ Currently, cloning from another RTF_CACHE is only possible during rt6_do_redirect(). Also, the old clone is removed from the tree immediately after the new clone is added. ] In case of cloning from an older redirect RTF_CACHE, it should work as before. In case of cloning from an older pmtu RTF_CACHE, this patch will forget the pmtu and re-learn it (if there is any) from the redirected route. The _rt6i_peer and DST_METRICS_FORCE_OVERWRITE will be removed in the next cleanup patch. Signed-off-by: Martin KaFai Lau Reviewed-by: Hannes Frederic Sowa Cc: Steffen Klassert Signed-off-by: David S. Miller