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Message-Id: <20180416152255.2256-8-dsahern@gmail.com>
Date: Mon, 16 Apr 2018 08:22:41 -0700
From: David Ahern <dsahern@...il.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, idosch@...sch.org, roopa@...ulusnetworks.com,
eric.dumazet@...il.com, weiwan@...gle.com, kafai@...com,
yoshfuji@...ux-ipv6.org, David Ahern <dsahern@...il.com>
Subject: [PATCH net-next 07/21] net/ipv6: Save route type in rt6_info
The RTN_ type for IPv6 FIB entries is currently embedded in rt6i_flags
and dst.error. Since dst is going to be removed, it can no longer be
relied on for FIB dumps so save the route type as fib6_type.
Signed-off-by: David Ahern <dsahern@...il.com>
---
include/net/ip6_fib.h | 1 +
net/ipv6/addrconf.c | 2 ++
net/ipv6/route.c | 46 ++++++++++++++++++++--------------------------
3 files changed, 23 insertions(+), 26 deletions(-)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index f0aaf1c8f1a8..0165820bbafb 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -174,6 +174,7 @@ struct rt6_info {
int rt6i_nh_weight;
unsigned short rt6i_nfheader_len;
u8 rt6i_protocol;
+ u8 fib6_type;
u8 exception_bucket_flushed:1,
should_flush:1,
unused:6;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 7d455d4df7ef..34d6aa65bf34 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2331,6 +2331,7 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
.fc_flags = RTF_UP | flags,
.fc_nlinfo.nl_net = dev_net(dev),
.fc_protocol = RTPROT_KERNEL,
+ .fc_type = RTN_UNICAST,
};
cfg.fc_dst = *pfx;
@@ -2394,6 +2395,7 @@ static void addrconf_add_mroute(struct net_device *dev)
.fc_ifindex = dev->ifindex,
.fc_dst_len = 8,
.fc_flags = RTF_UP,
+ .fc_type = RTN_UNICAST,
.fc_nlinfo.nl_net = dev_net(dev),
};
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1d2b6b1c5dae..177c85e7aa4d 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -307,6 +307,7 @@ static const struct rt6_info ip6_null_entry_template = {
.rt6i_protocol = RTPROT_KERNEL,
.rt6i_metric = ~(u32) 0,
.rt6i_ref = ATOMIC_INIT(1),
+ .fib6_type = RTN_UNREACHABLE,
};
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
@@ -324,6 +325,7 @@ static const struct rt6_info ip6_prohibit_entry_template = {
.rt6i_protocol = RTPROT_KERNEL,
.rt6i_metric = ~(u32) 0,
.rt6i_ref = ATOMIC_INIT(1),
+ .fib6_type = RTN_PROHIBIT,
};
static const struct rt6_info ip6_blk_hole_entry_template = {
@@ -339,6 +341,7 @@ static const struct rt6_info ip6_blk_hole_entry_template = {
.rt6i_protocol = RTPROT_KERNEL,
.rt6i_metric = ~(u32) 0,
.rt6i_ref = ATOMIC_INIT(1),
+ .fib6_type = RTN_BLACKHOLE,
};
#endif
@@ -2802,6 +2805,11 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
goto out;
}
+ if (cfg->fc_type > RTN_MAX) {
+ NL_SET_ERR_MSG(extack, "Invalid route type");
+ goto out;
+ }
+
if (cfg->fc_dst_len > 128) {
NL_SET_ERR_MSG(extack, "Invalid prefix length");
goto out;
@@ -2914,6 +2922,8 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
rt->rt6i_metric = cfg->fc_metric;
rt->rt6i_nh_weight = 1;
+ rt->fib6_type = cfg->fc_type;
+
/* We cannot add true routes via loopback here,
they would result in kernel looping; promote them to reject routes
*/
@@ -3354,6 +3364,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
.fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO |
RTF_UP | RTF_PREF(pref),
.fc_protocol = RTPROT_RA,
+ .fc_type = RTN_UNICAST,
.fc_nlinfo.portid = 0,
.fc_nlinfo.nlh = NULL,
.fc_nlinfo.nl_net = net,
@@ -3410,6 +3421,7 @@ struct rt6_info *rt6_add_dflt_router(struct net *net,
.fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
RTF_UP | RTF_EXPIRES | RTF_PREF(pref),
.fc_protocol = RTPROT_RA,
+ .fc_type = RTN_UNICAST,
.fc_nlinfo.portid = 0,
.fc_nlinfo.nlh = NULL,
.fc_nlinfo.nl_net = net,
@@ -3485,6 +3497,7 @@ static void rtmsg_to_fib6_config(struct net *net,
cfg->fc_dst_len = rtmsg->rtmsg_dst_len;
cfg->fc_src_len = rtmsg->rtmsg_src_len;
cfg->fc_flags = rtmsg->rtmsg_flags;
+ cfg->fc_type = rtmsg->rtmsg_type;
cfg->fc_nlinfo.nl_net = net;
@@ -3605,10 +3618,13 @@ struct rt6_info *addrconf_dst_alloc(struct net *net,
rt->rt6i_protocol = RTPROT_KERNEL;
rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
- if (anycast)
+ if (anycast) {
+ rt->fib6_type = RTN_ANYCAST;
rt->rt6i_flags |= RTF_ANYCAST;
- else
+ } else {
+ rt->fib6_type = RTN_LOCAL;
rt->rt6i_flags |= RTF_LOCAL;
+ }
rt->rt6i_gateway = *addr;
rt->rt6i_dst.addr = *addr;
@@ -4508,30 +4524,8 @@ static int rt6_fill_node(struct net *net,
rtm->rtm_table = table;
if (nla_put_u32(skb, RTA_TABLE, table))
goto nla_put_failure;
- if (rt->rt6i_flags & RTF_REJECT) {
- switch (rt->dst.error) {
- case -EINVAL:
- rtm->rtm_type = RTN_BLACKHOLE;
- break;
- case -EACCES:
- rtm->rtm_type = RTN_PROHIBIT;
- break;
- case -EAGAIN:
- rtm->rtm_type = RTN_THROW;
- break;
- default:
- rtm->rtm_type = RTN_UNREACHABLE;
- break;
- }
- }
- else if (rt->rt6i_flags & RTF_LOCAL)
- rtm->rtm_type = RTN_LOCAL;
- else if (rt->rt6i_flags & RTF_ANYCAST)
- rtm->rtm_type = RTN_ANYCAST;
- else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK))
- rtm->rtm_type = RTN_LOCAL;
- else
- rtm->rtm_type = RTN_UNICAST;
+
+ rtm->rtm_type = rt->fib6_type;
rtm->rtm_flags = 0;
rtm->rtm_scope = RT_SCOPE_UNIVERSE;
rtm->rtm_protocol = rt->rt6i_protocol;
--
2.11.0
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