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Date: Sun, 23 Aug 2015 08:26:04 -0600
From: David Ahern <dsa@...ulusnetworks.com>
To: netdev@...r.kernel.org
Cc: shm@...ulusnetworks.com, David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH net-next] inetpeer: Add support for VRFs
inetpeer caches based on address only, so duplicate IP addresses within
a namespace return the same cached entry. Similar to IP fragments handle
duplicate addresses across VRFs by adding the VRF master device index to
the lookup.
Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
include/net/inetpeer.h | 11 ++++++++++-
net/ipv4/icmp.c | 3 ++-
net/ipv4/inetpeer.c | 5 +++++
net/ipv4/ip_fragment.c | 3 ++-
net/ipv4/route.c | 7 +++++--
5 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
index 002f0bd27001..a75b648b8545 100644
--- a/include/net/inetpeer.h
+++ b/include/net/inetpeer.h
@@ -26,6 +26,9 @@ struct inetpeer_addr_base {
struct inetpeer_addr {
struct inetpeer_addr_base addr;
__u16 family;
+#if IS_ENABLED(CONFIG_NET_VRF)
+ int vif;
+#endif
};
struct inet_peer {
@@ -78,12 +81,15 @@ struct inet_peer *inet_getpeer(struct inet_peer_base *base,
static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base,
__be32 v4daddr,
- int create)
+ int vif, int create)
{
struct inetpeer_addr daddr;
daddr.addr.a4 = v4daddr;
daddr.family = AF_INET;
+#if IS_ENABLED(CONFIG_NET_VRF)
+ daddr.vif = vif;
+#endif
return inet_getpeer(base, &daddr, create);
}
@@ -95,6 +101,9 @@ static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
daddr.addr.in6 = *v6daddr;
daddr.family = AF_INET6;
+#if IS_ENABLED(CONFIG_NET_VRF)
+ daddr.vif = 0; /* placeholder until VRF suppoort is added to IPv6 */
+#endif
return inet_getpeer(base, &daddr, create);
}
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index f16488efa1c8..79fe05befcae 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -309,9 +309,10 @@ static bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
rc = false;
if (icmp_global_allow()) {
+ int vif = vrf_master_ifindex(dst->dev);
struct inet_peer *peer;
- peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, 1);
+ peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, vif, 1);
rc = inet_peer_xrlim_allow(peer,
net->ipv4.sysctl_icmp_ratelimit);
if (peer)
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index 241afd743d2c..b5f268a3ea6b 100644
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -170,6 +170,11 @@ static int addr_compare(const struct inetpeer_addr *a,
return 1;
}
+#if IS_ENABLED(CONFIG_NET_VRF)
+ if (a->vif != b->vif)
+ return a->vif < b->vif ? -1 : 1;
+#endif
+
return 0;
}
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 15762e758861..fa7f15305f9a 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -151,7 +151,8 @@ static void ip4_frag_init(struct inet_frag_queue *q, const void *a)
qp->vif = arg->vif;
qp->user = arg->user;
qp->peer = sysctl_ipfrag_max_dist ?
- inet_getpeer_v4(net->ipv4.peers, arg->iph->saddr, 1) : NULL;
+ inet_getpeer_v4(net->ipv4.peers, arg->iph->saddr, arg->vif, 1) :
+ NULL;
}
static void ip4_frag_free(struct inet_frag_queue *q)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 2403e85107f0..6805d57152b9 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -838,6 +838,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
struct inet_peer *peer;
struct net *net;
int log_martians;
+ int vif;
rcu_read_lock();
in_dev = __in_dev_get_rcu(rt->dst.dev);
@@ -846,10 +847,11 @@ void ip_rt_send_redirect(struct sk_buff *skb)
return;
}
log_martians = IN_DEV_LOG_MARTIANS(in_dev);
+ vif = vrf_master_ifindex_rcu(rt->dst.dev);
rcu_read_unlock();
net = dev_net(rt->dst.dev);
- peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, 1);
+ peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, vif, 1);
if (!peer) {
icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST,
rt_nexthop(rt, ip_hdr(skb)->daddr));
@@ -938,7 +940,8 @@ static int ip_error(struct sk_buff *skb)
break;
}
- peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, 1);
+ peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr,
+ vrf_master_ifindex(skb->dev), 1);
send = true;
if (peer) {
--
2.3.2 (Apple Git-55)
--
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