[RFC net-next 6/6] ipvlan: Call ILA in incoming and outgoing receive paths

[Tom Herbert]

Hacked IPVLAN to call ILA functions in send and receive paths.

Signed-off-by: Tom Herbert <t...@herbertland.com>
---
 drivers/net/ipvlan/ipvlan.h      |  1 +
 drivers/net/ipvlan/ipvlan_core.c | 27 ++++++++++++++++++---------
 drivers/net/ipvlan/ipvlan_main.c |  4 ++++
 3 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 953a974..3b85260 100644
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -28,6 +28,7 @@
 #include <net/rtnetlink.h>
 #include <net/route.h>
 #include <net/addrconf.h>
+#include <net/ila.h>
 
 #define IPVLAN_DRV     "ipvlan"
 #define IPV_DRV_VER    "0.1"
diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 8afbeda..7e71907 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -9,6 +9,8 @@
 
 #include "ipvlan.h"
 
+extern bool query_ila;
+
 static u32 ipvlan_jhash_secret __read_mostly;
 
 void ipvlan_init_secret(void)
@@ -385,15 +387,18 @@ static int ipvlan_process_v6_outbound(struct sk_buff *skb)
        struct net_device *dev = skb->dev;
        struct dst_entry *dst;
        int err, ret = NET_XMIT_DROP;
-       struct flowi6 fl6 = {
-               .flowi6_iif = skb->dev->ifindex,
-               .daddr = ip6h->daddr,
-               .saddr = ip6h->saddr,
-               .flowi6_flags = FLOWI_FLAG_ANYSRC,
-               .flowlabel = ip6_flowinfo(ip6h),
-               .flowi6_mark = skb->mark,
-               .flowi6_proto = ip6h->nexthdr,
-       };
+       struct flowi6 fl6;
+
+       if (query_ila && ila_xlat_outgoing(skb) < 0)
+               goto err;
+
+       fl6.flowi6_iif = skb->dev->ifindex;
+       fl6.daddr = ip6h->daddr;
+       fl6.saddr = ip6h->saddr;
+       fl6.flowi6_flags = FLOWI_FLAG_ANYSRC;
+       fl6.flowlabel = ip6_flowinfo(ip6h);
+       fl6.flowi6_mark = skb->mark;
+       fl6.flowi6_proto = ip6h->nexthdr;
 
        dst = ip6_route_output(dev_net(dev), NULL, &fl6);
        if (dst->error) {
@@ -401,6 +406,7 @@ static int ipvlan_process_v6_outbound(struct sk_buff *skb)
                dst_release(dst);
                goto err;
        }
+
        skb_dst_drop(skb);
        skb_dst_set(skb, dst);
        err = ip6_local_out(skb);
@@ -583,6 +589,9 @@ static rx_handler_result_t ipvlan_handle_mode_l3(struct 
sk_buff **pskb,
        struct sk_buff *skb = *pskb;
        rx_handler_result_t ret = RX_HANDLER_PASS;
 
+       if (query_ila && ila_xlat_incoming(skb) < 0)
+               goto out;
+
        lyr3h = ipvlan_get_L3_hdr(skb, &addr_type);
        if (!lyr3h)
                goto out;
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 1acc283..e029fad 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -9,6 +9,10 @@
 
 #include "ipvlan.h"
 
+bool query_ila = false;
+module_param(query_ila, bool, 0644);
+MODULE_PARM_DESC(query_ila, "Query ILA in incoming and outgoing paths");
+
 void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
 {
        ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
-- 
1.8.1

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