linux/net/bridge
David S. Miller a6ff1a2f1e Merge branch 'nexthop_exceptions'
These patches implement the final mechanism necessary to really allow
us to go without the route cache in ipv4.

We need a place to have long-term storage of PMTU/redirect information
which is independent of the routes themselves, yet does not get us
back into a situation where we have to write to metrics or anything
like that.

For this we use an "next-hop exception" table in the FIB nexthops.

The one thing I desperately want to avoid is having to create clone
routes in the FIB trie for this purpose, because that is very
expensive.   However, I'm willing to entertain such an idea later
if this current scheme proves to have downsides that the FIB trie
variant would not have.

In order to accomodate this any such scheme, we need to be able to
produce a full flow key at PMTU/redirect time.  That required an
adjustment of the interface call-sites used to propagate these events.

For a PMTU/redirect with a fully specified socket, we pass that socket
and use it to produce the flow key.

Otherwise we use a passed in SKB to formulate the key.  There are two
cases that need to be distinguished, ICMP message processing (in which
case the IP header is at skb->data) and output packet processing
(mostly tunnels, and in all such cases the IP header is at ip_hdr(skb)).

We also have to make the code able to handle the case where the dst
itself passed into the dst_ops->{update_pmtu,redirect} method is
invalidated.  This matters for calls from sockets that have cached
that route.  We provide a inet{,6} helper function for this purpose,
and edit SCTP specially since it caches routes at the transport rather
than socket level.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-17 10:48:26 -07:00
..
netfilter netfilter: use kfree_skb() not kfree() 2012-06-30 17:26:51 -07:00
br_device.c netpoll: move np->dev and np->dev_name init into __netpoll_setup() 2012-07-17 09:02:36 -07:00
br_fdb.c bridge: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:17 -04:00
br_forward.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
br_if.c bridge: Assign rtnl_link_ops to bridge devices created via ioctl (v2) 2012-06-26 21:12:32 -07:00
br_input.c bridge: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:17 -04:00
br_ioctl.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-04-11 13:44:25 -07:00
br_multicast.c bridge: Fix enforcement of multicast hash_max limit 2012-07-16 22:59:30 -07:00
br_netfilter.c net: Pass optional SKB and SK arguments to dst_ops->{update_pmtu,redirect}() 2012-07-17 03:29:28 -07:00
br_netlink.c bridge: Assign rtnl_link_ops to bridge devices created via ioctl (v2) 2012-06-26 21:12:32 -07:00
br_notify.c Bridge: Always send NETDEV_CHANGEADDR up on br MAC change. 2011-08-09 21:44:44 -07:00
br_private_stp.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
br_private.h bridge: Assign rtnl_link_ops to bridge devices created via ioctl (v2) 2012-06-26 21:12:32 -07:00
br_stp_bpdu.c bridge: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:17 -04:00
br_stp_if.c bridge: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:17 -04:00
br_stp_timer.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
br_stp.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
br_sysfs_br.c bridge: Add multicast_querier toggle and disable queries by default 2012-04-15 12:51:35 -04:00
br_sysfs_if.c bridge: range check STP parameters 2011-04-04 17:22:29 -07:00
br.c net:bridge: use IS_ENABLED 2011-12-16 15:49:52 -05:00
Kconfig net: bridge builtin vs. ipv6 modular 2011-03-10 13:45:57 -08:00
Makefile bridge: Add core IGMP snooping support 2010-02-28 00:48:45 -08:00