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Date: Mon, 25 Jul 2016 14:38:16 -0700
From: Mahesh Bandewar <mahesh@...dewar.net>
To: David Miller <davem@...emloft.net>
Cc: Mahesh Bandewar <maheshb@...gle.com>,
Eric Dumazet <edumazet@...gle.com>,
netdev <netdev@...r.kernel.org>
Subject: [PATCH next] ipvlan: Scrub skb before crossing the namespace boundry
From: Mahesh Bandewar <maheshb@...gle.com>
The earlier patch c3aaa06d5a63 (ipvlan: scrub skb before routing
in L3 mode.) did this but only for TX path in L3 mode. This
patch extends it for both the modes for TX/RX path.
Signed-off-by: Mahesh Bandewar <maheshb@...gle.com>
---
drivers/net/ipvlan/ipvlan_core.c | 39 +++++++++++++++++++++++++--------------
1 file changed, 25 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index d6d0524ee5fd..b5f9511d819e 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -254,6 +254,18 @@ acct:
}
}
+static void ipvlan_skb_crossing_ns(struct sk_buff *skb, struct net_device *dev)
+{
+ bool xnet = true;
+
+ if (dev)
+ xnet = !net_eq(dev_net(skb->dev), dev_net(dev));
+
+ skb_scrub_packet(skb, xnet);
+ if (dev)
+ skb->dev = dev;
+}
+
static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff **pskb,
bool local)
{
@@ -280,7 +292,7 @@ static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff **pskb,
*pskb = skb;
}
- skb->dev = dev;
+ ipvlan_skb_crossing_ns(skb, dev);
if (local) {
skb->pkt_type = PACKET_HOST;
@@ -347,7 +359,7 @@ static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
return addr;
}
-static int ipvlan_process_v4_outbound(struct sk_buff *skb, bool xnet)
+static int ipvlan_process_v4_outbound(struct sk_buff *skb)
{
const struct iphdr *ip4h = ip_hdr(skb);
struct net_device *dev = skb->dev;
@@ -370,7 +382,6 @@ static int ipvlan_process_v4_outbound(struct sk_buff *skb, bool xnet)
ip_rt_put(rt);
goto err;
}
- skb_scrub_packet(skb, xnet);
skb_dst_set(skb, &rt->dst);
err = ip_local_out(net, skb->sk, skb);
if (unlikely(net_xmit_eval(err)))
@@ -385,7 +396,7 @@ out:
return ret;
}
-static int ipvlan_process_v6_outbound(struct sk_buff *skb, bool xnet)
+static int ipvlan_process_v6_outbound(struct sk_buff *skb)
{
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
struct net_device *dev = skb->dev;
@@ -408,7 +419,6 @@ static int ipvlan_process_v6_outbound(struct sk_buff *skb, bool xnet)
dst_release(dst);
goto err;
}
- skb_scrub_packet(skb, xnet);
skb_dst_set(skb, dst);
err = ip6_local_out(net, skb->sk, skb);
if (unlikely(net_xmit_eval(err)))
@@ -423,7 +433,7 @@ out:
return ret;
}
-static int ipvlan_process_outbound(struct sk_buff *skb, bool xnet)
+static int ipvlan_process_outbound(struct sk_buff *skb)
{
struct ethhdr *ethh = eth_hdr(skb);
int ret = NET_XMIT_DROP;
@@ -447,9 +457,9 @@ static int ipvlan_process_outbound(struct sk_buff *skb, bool xnet)
}
if (skb->protocol == htons(ETH_P_IPV6))
- ret = ipvlan_process_v6_outbound(skb, xnet);
+ ret = ipvlan_process_v6_outbound(skb);
else if (skb->protocol == htons(ETH_P_IP))
- ret = ipvlan_process_v4_outbound(skb, xnet);
+ ret = ipvlan_process_v4_outbound(skb);
else {
pr_warn_ratelimited("Dropped outbound packet type=%x\n",
ntohs(skb->protocol));
@@ -485,7 +495,6 @@ static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev)
void *lyr3h;
struct ipvl_addr *addr;
int addr_type;
- bool xnet;
lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
if (!lyr3h)
@@ -496,9 +505,8 @@ static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev)
return ipvlan_rcv_frame(addr, &skb, true);
out:
- xnet = !net_eq(dev_net(skb->dev), dev_net(ipvlan->phy_dev));
- skb->dev = ipvlan->phy_dev;
- return ipvlan_process_outbound(skb, xnet);
+ ipvlan_skb_crossing_ns(skb, ipvlan->phy_dev);
+ return ipvlan_process_outbound(skb);
}
static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
@@ -528,11 +536,12 @@ static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
return dev_forward_skb(ipvlan->phy_dev, skb);
} else if (is_multicast_ether_addr(eth->h_dest)) {
+ ipvlan_skb_crossing_ns(skb, NULL);
ipvlan_multicast_enqueue(ipvlan->port, skb);
return NET_XMIT_SUCCESS;
}
- skb->dev = ipvlan->phy_dev;
+ ipvlan_skb_crossing_ns(skb, ipvlan->phy_dev);
return dev_queue_xmit(skb);
}
@@ -622,8 +631,10 @@ static rx_handler_result_t ipvlan_handle_mode_l2(struct sk_buff **pskb,
* when work-queue processes this frame. This is
* achieved by returning RX_HANDLER_PASS.
*/
- if (nskb)
+ if (nskb) {
+ ipvlan_skb_crossing_ns(nskb, NULL);
ipvlan_multicast_enqueue(port, nskb);
+ }
}
} else {
struct ipvl_addr *addr;
--
2.8.0.rc3.226.g39d4020
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