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authorHannes Frederic Sowa <hannes@stressinduktion.org>2014-09-28 02:46:06 +0400
committerDavid S. Miller <davem@davemloft.net>2014-09-30 22:00:48 +0400
commit705f1c869d577c8055736dd02501f26a2507dd5b (patch)
tree3a4f24c153155059b2eaa85c30b432fd202902e6 /net/ipv6/addrconf_core.c
parentdedb845ded56ded1c62f5398a94ffa8615d4592d (diff)
downloadlinux-705f1c869d577c8055736dd02501f26a2507dd5b.tar.xz
ipv6: remove rt6i_genid
Eric Dumazet noticed that all no-nonexthop or no-gateway routes which are already marked DST_HOST (e.g. input routes routes) will always be invalidated during sk_dst_check. Thus per-socket dst caching absolutely had no effect and early demuxing had no effect. Thus this patch removes rt6i_genid: fn_sernum already gets modified during add operations, so we only must ensure we mutate fn_sernum during ipv6 address remove operations. This is a fairly cost extensive operations, but address removal should not happen that often. Also our mtu update functions do the same and we heard no complains so far. xfrm policy changes also cause a call into fib6_flush_trees. Also plug a hole in rt6_info (no cacheline changes). I verified via tracing that this change has effect. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: YOSHIFUJI Hideaki <hideaki@yoshifuji.org> Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com> Cc: Martin Lau <kafai@fb.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/addrconf_core.c')
-rw-r--r--net/ipv6/addrconf_core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c
index e6960457f625..98cc4cd570e2 100644
--- a/net/ipv6/addrconf_core.c
+++ b/net/ipv6/addrconf_core.c
@@ -8,6 +8,13 @@
#include <net/addrconf.h>
#include <net/ip.h>
+/* if ipv6 module registers this function is used by xfrm to force all
+ * sockets to relookup their nodes - this is fairly expensive, be
+ * careful
+ */
+void (*__fib6_flush_trees)(struct net *);
+EXPORT_SYMBOL(__fib6_flush_trees);
+
#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
static inline unsigned int ipv6_addr_scope2type(unsigned int scope)