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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2012-10-22 03:42:09 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-23 02:38:32 -0400 |
| commit | 51ebd3181572af8d5076808dab2682d800f6da5d (patch) | |
| tree | 41bce53f5ed82791ea5975f6ce708f54729659b4 /include | |
| parent | d94ce9b283736a876b2e6dec665c68e5e8b5d55e (diff) | |
| download | linux-51ebd3181572af8d5076808dab2682d800f6da5d.tar.gz linux-51ebd3181572af8d5076808dab2682d800f6da5d.tar.bz2 linux-51ebd3181572af8d5076808dab2682d800f6da5d.zip | |
ipv6: add support of equal cost multipath (ECMP)
Each nexthop is added like a single route in the routing table. All routes
that have the same metric/weight and destination but not the same gateway
are considering as ECMP routes. They are linked together, through a list called
rt6i_siblings.
ECMP routes can be added in one shot, with RTA_MULTIPATH attribute or one after
the other (in both case, the flag NLM_F_EXCL should not be set).
The patch is based on a previous work from
Luc Saillard <luc.saillard@6wind.com>.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip6_fib.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index 8a2a203eb15d..20210d79e36a 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -47,6 +47,8 @@ struct fib6_config { unsigned long fc_expires; struct nlattr *fc_mx; int fc_mx_len; + int fc_mp_len; + struct nlattr *fc_mp; struct nl_info fc_nlinfo; }; @@ -99,6 +101,14 @@ struct rt6_info { struct in6_addr rt6i_gateway; + /* Multipath routes: + * siblings is a list of rt6_info that have the the same metric/weight, + * destination, but not the same gateway. nsiblings is just a cache + * to speed up lookup. + */ + struct list_head rt6i_siblings; + unsigned int rt6i_nsiblings; + atomic_t rt6i_ref; /* These are in a separate cache line. */ |