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ipv6: fib: Add offload indication to routes 

Allow user space applications to see which routes are offloaded and
which aren't by setting the RTNH_F_OFFLOAD flag when dumping them.

To be consistent with IPv4, offload indication is provided on a
per-nexthop basis.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2017-08-03 13:28:20 +02:00 committed by David S. Miller
parent e1ee0a5ba3
commit 61e4d01e16
2 changed files with 9 additions and 0 deletions
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1
include/uapi/linux/ipv6_route.h
View File

@ -35,6 +35,7 @@
#define RTF_PREF(pref) ((pref) << 27)
#define RTF_PREF_MASK 0x18000000
#define RTF_OFFLOAD 0x20000000 /* offloaded route */
#define RTF_PCPU 0x40000000 /* read-only: can not be set by user */
#define RTF_LOCAL 0x80000000

8
net/ipv6/route.c
View File

@ -1820,6 +1820,11 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
goto out;
}
if (cfg->fc_flags & RTF_OFFLOAD) {
NL_SET_ERR_MSG(extack, "Userspace can not set RTF_OFFLOAD");
goto out;
}
if (cfg->fc_dst_len > 128) {
NL_SET_ERR_MSG(extack, "Invalid prefix length");
goto out;
@ -3327,6 +3332,9 @@ static int rt6_nexthop_info(struct sk_buff *skb, struct rt6_info *rt,
goto nla_put_failure;
}
if (rt->rt6i_flags & RTF_OFFLOAD)
*flags |= RTNH_F_OFFLOAD;
/* not needed for multipath encoding b/c it has a rtnexthop struct */
if (!skip_oif && rt->dst.dev &&
nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))