diff options
| author | fan.du <fan.du@windriver.com> | 2013-08-01 17:44:44 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-01 16:33:32 -0700 |
| commit | 439677d766ba9095e5afc4a30147f65bc363b6e7 (patch) | |
| tree | 61c976d20b54e9de16f51b62d569e450f5f14661 /net | |
| parent | c1fc20aa16b3d0c52d88fffb3eca6981f3f82ca7 (diff) | |
| download | linux-439677d766ba9095e5afc4a30147f65bc363b6e7.tar.bz2 | |
ipv6: bump genid when delete/add address
Server Client
2001:1::803/64 <-> 2001:1::805/64
2001:2::804/64 <-> 2001:2::806/64
Server side fib binary tree looks like this:
(2001:/64)
/
/
ffff88002103c380
/ \
(2) / \
(2001::803/128) ffff880037ac07c0
/ \
/ \ (3)
ffff880037ac0640 (2001::806/128)
/ \
(1) / \
(2001::804/128) (2001::805/128)
Delete 2001::804/64 won't cause prefix route deleted as well as rt in (3)
destinate to 2001::806 with source address as 2001::804/64. That's because
2001::803/64 is still alive, which make onlink=1 in ipv6_del_addr, this is
where the substantial difference between same prefix configuration and
different prefix configuration :) So packet are still transmitted out to
2001::806 with source address as 2001::804/64.
So bump genid will clear rt in (3), and up layer protocol will eventually
find the right one for themselves.
This problem arised from the discussion in here:
http://marc.info/?l=linux-netdev&m=137404469219410&w=4
Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index cfdcf7b2daf6..e7780d72067c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -4653,6 +4653,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) break; } atomic_inc(&net->ipv6.dev_addr_genid); + rt_genid_bump_ipv6(net); } static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |