From: Roopa Prabhu <ro...@cumulusnetworks.com>
This patch adds support in ipv6 fib functions to parse Netlink
RTA encap attributes and attach encap state data to rt6_info.
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
---
include/net/ip6_fib.h | 3 +++
net/ipv6/ip6_fib.c | 2 ++
net/ipv6/route.c | 33 ++++++++++++++++++++++++++++++---
3 files changed, 35 insertions(+), 3 deletions(-)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 3b76849..276328e 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -51,6 +51,8 @@ struct fib6_config {
struct nlattr *fc_mp;
struct nl_info fc_nlinfo;
+ struct nlattr *fc_encap;
+ u16 fc_encap_type;
};
struct fib6_node {
@@ -131,6 +133,7 @@ struct rt6_info {
/* more non-fragment space at head required */
unsigned short rt6i_nfheader_len;
u8 rt6i_protocol;
+ struct lwtunnel_state *rt6i_lwtstate;
};
static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 55d1986..d715f2e 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -32,6 +32,7 @@
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/addrconf.h>
+#include <net/lwtunnel.h>
#include <net/ip6_fib.h>
#include <net/ip6_route.h>
@@ -177,6 +178,7 @@ static void rt6_free_pcpu(struct rt6_info *non_pcpu_rt)
static void rt6_release(struct rt6_info *rt)
{
if (atomic_dec_and_test(&rt->rt6i_ref)) {
+ lwtunnel_state_put(rt->rt6i_lwtstate);
rt6_free_pcpu(rt);
dst_free(&rt->dst);
}
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 6090969..b3431b7 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -58,6 +58,7 @@
#include <net/netevent.h>
#include <net/netlink.h>
#include <net/nexthop.h>
+#include <net/lwtunnel.h>
#include <asm/uaccess.h>
@@ -1770,6 +1771,17 @@ int ip6_route_add(struct fib6_config *cfg)
rt->dst.output = ip6_output;
+ if (cfg->fc_encap) {
+ struct lwtunnel_state *lwtstate;
+
+ err = lwtunnel_build_state(dev, cfg->fc_encap_type,
+ cfg->fc_encap, &lwtstate);
+ if (err)
+ goto out;
+ lwtunnel_state_get(lwtstate);
+ rt->rt6i_lwtstate = lwtstate;
+ }
+
ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
rt->rt6i_dst.plen = cfg->fc_dst_len;
if (rt->rt6i_dst.plen == 128)
@@ -2595,6 +2607,8 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1]
= {
[RTA_METRICS] = { .type = NLA_NESTED },
[RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) },
[RTA_PREF] = { .type = NLA_U8 },
+ [RTA_ENCAP_TYPE] = { .type = NLA_U16 },
+ [RTA_ENCAP] = { .type = NLA_NESTED },
};
static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -2689,6 +2703,12 @@ static int rtm_to_fib6_config(struct sk_buff *skb,
struct nlmsghdr *nlh,
cfg->fc_flags |= RTF_PREF(pref);
}
+ if (tb[RTA_ENCAP])
+ cfg->fc_encap = tb[RTA_ENCAP];
+
+ if (tb[RTA_ENCAP_TYPE])
+ cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]);
+
err = 0;
errout:
return err;
@@ -2721,6 +2741,10 @@ beginning:
r_cfg.fc_gateway = nla_get_in6_addr(nla);
r_cfg.fc_flags |= RTF_GATEWAY;
}
+ r_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP);
+ nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE);
+ if (nla)
+ r_cfg.fc_encap_type = nla_get_u16(nla);
}
err = add ? ip6_route_add(&r_cfg) : ip6_route_del(&r_cfg);
if (err) {
@@ -2783,7 +2807,7 @@ static int inet6_rtm_newroute(struct sk_buff *skb, struct
nlmsghdr *nlh)
return ip6_route_add(&cfg);
}
-static inline size_t rt6_nlmsg_size(void)
+static inline size_t rt6_nlmsg_size(struct rt6_info *rt)
{
return NLMSG_ALIGN(sizeof(struct rtmsg))
+ nla_total_size(16) /* RTA_SRC */
@@ -2797,7 +2821,8 @@ static inline size_t rt6_nlmsg_size(void)
+ RTAX_MAX * nla_total_size(4) /* RTA_METRICS */
+ nla_total_size(sizeof(struct rta_cacheinfo))
+ nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */
- + nla_total_size(1); /* RTA_PREF */
+ + nla_total_size(1) /* RTA_PREF */
+ + lwtunnel_get_encap_size(rt->rt6i_lwtstate);
}
static int rt6_fill_node(struct net *net,
@@ -2945,6 +2970,8 @@ static int rt6_fill_node(struct net *net,
if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags)))
goto nla_put_failure;
+ lwtunnel_fill_encap(skb, rt->rt6i_lwtstate);
+
nlmsg_end(skb, nlh);
return 0;
@@ -3071,7 +3098,7 @@ void inet6_rt_notify(int event, struct rt6_info *rt,
struct nl_info *info)
err = -ENOBUFS;
seq = info->nlh ? info->nlh->nlmsg_seq : 0;
- skb = nlmsg_new(rt6_nlmsg_size(), gfp_any());
+ skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any());
if (!skb)
goto errout;
--
2.4.3
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