datapath: Check for supported kernel versions.

[sliver-openvswitch.git] / datapath / datapath.c

diff --git a/datapath/datapath.c b/datapath/datapath.c
index e8ff4a5..d901e6b 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -54,6 +54,11 @@
 #include "vlan.h"
 #include "vport-internal_dev.h"
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
+    LINUX_VERSION_CODE > KERNEL_VERSION(2,6,38)
+#error Kernels before 2.6.18 or after 2.6.38 are not supported by this version of Open vSwitch.
+#endif
+
 int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
 EXPORT_SYMBOL(dp_ioctl_hook);
 
@@ -682,6 +687,7 @@ static int odp_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
        struct datapath *dp;
        struct ethhdr *eth;
        bool is_frag;
+       int len;
        int err;
 
        err = -EINVAL;
@@ -693,12 +699,14 @@ static int odp_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
        if (err)
                goto err;
 
-       packet = skb_clone(skb, GFP_KERNEL);
+       len = nla_len(a[ODP_PACKET_ATTR_PACKET]);
+       packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
        err = -ENOMEM;
        if (!packet)
                goto err;
-       packet->data = nla_data(a[ODP_PACKET_ATTR_PACKET]);
-       packet->len = nla_len(a[ODP_PACKET_ATTR_PACKET]);
+       skb_reserve(packet, NET_IP_ALIGN);
+
+       memcpy(__skb_put(packet, len), nla_data(a[ODP_PACKET_ATTR_PACKET]), len);
 
        skb_reset_mac_header(packet);
        eth = eth_hdr(packet);