datapath: Backport reciprocal division.

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

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 534ab91..a964c27 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -54,8 +54,8 @@
 #include "vport-internal_dev.h"
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
-    LINUX_VERSION_CODE > KERNEL_VERSION(2,6,39)
-#error Kernels before 2.6.18 or after 2.6.39 are not supported by this version of Open vSwitch.
+    LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
+#error Kernels before 2.6.18 or after 3.0 are not supported by this version of Open vSwitch.
 #endif
 
 int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
@@ -84,7 +84,7 @@ EXPORT_SYMBOL(dp_ioctl_hook);
 static LIST_HEAD(dps);
 
 static struct vport *new_vport(const struct vport_parms *);
-static int queue_control_packets(struct datapath *, struct sk_buff *,
+static int queue_userspace_packets(struct datapath *, struct sk_buff *,
                                 const struct dp_upcall_info *);
 
 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
@@ -289,7 +289,7 @@ void dp_process_received_packet(struct vport *p, struct sk_buff *skb)
                }
 
                if (is_frag && dp->drop_frags) {
-                       kfree_skb(skb);
+                       consume_skb(skb);
                        stats_counter_off = offsetof(struct dp_stats_percpu, n_frags);
                        goto out;
                }
@@ -399,33 +399,28 @@ int dp_upcall(struct datapath *dp, struct sk_buff *skb, const struct dp_upcall_i
 
        WARN_ON_ONCE(skb_shared(skb));
 
-       forward_ip_summed(skb);
-
-       err = vswitch_skb_checksum_setup(skb);
-       if (err)
-               goto err_kfree_skb;
+       forward_ip_summed(skb, true);
 
        /* Break apart GSO packets into their component pieces.  Otherwise
         * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */
        if (skb_is_gso(skb)) {
                struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
                
-               kfree_skb(skb);
-               skb = nskb;
-               if (IS_ERR(skb)) {
-                       err = PTR_ERR(skb);
+               if (IS_ERR(nskb)) {
+                       kfree_skb(skb);
+                       err = PTR_ERR(nskb);
                        goto err;
                }
+               consume_skb(skb);
+               skb = nskb;
        }
 
-       err = queue_control_packets(dp, skb, upcall_info);
+       err = queue_userspace_packets(dp, skb, upcall_info);
        if (err)
                goto err;
 
        return 0;
 
-err_kfree_skb:
-       kfree_skb(skb);
 err:
        local_bh_disable();
        stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
@@ -443,7 +438,7 @@ err:
  * 'upcall_info'.  There will be only one packet unless we broke up a GSO
  * packet.
  */
-static int queue_control_packets(struct datapath *dp, struct sk_buff *skb,
+static int queue_userspace_packets(struct datapath *dp, struct sk_buff *skb,
                                 const struct dp_upcall_info *upcall_info)
 {
        u32 group = packet_mc_group(dp, upcall_info->cmd);
@@ -512,7 +507,7 @@ static int queue_control_packets(struct datapath *dp, struct sk_buff *skb,
                if (err)
                        goto err_kfree_skbs;
 
-               kfree_skb(skb);
+               consume_skb(skb);
                skb = nskb;
        } while (skb);
        return 0;
@@ -557,7 +552,7 @@ static int validate_actions(const struct nlattr *attr)
        nla_for_each_nested(a, attr, rem) {
                static const u32 action_lens[ODP_ACTION_ATTR_MAX + 1] = {
                        [ODP_ACTION_ATTR_OUTPUT] = 4,
-                       [ODP_ACTION_ATTR_CONTROLLER] = 8,
+                       [ODP_ACTION_ATTR_USERSPACE] = 8,
                        [ODP_ACTION_ATTR_SET_DL_TCI] = 2,
                        [ODP_ACTION_ATTR_STRIP_VLAN] = 0,
                        [ODP_ACTION_ATTR_SET_DL_SRC] = ETH_ALEN,
@@ -580,7 +575,7 @@ static int validate_actions(const struct nlattr *attr)
                case ODP_ACTION_ATTR_UNSPEC:
                        return -EINVAL;
 
-               case ODP_ACTION_ATTR_CONTROLLER:
+               case ODP_ACTION_ATTR_USERSPACE:
                case ODP_ACTION_ATTR_STRIP_VLAN:
                case ODP_ACTION_ATTR_SET_DL_SRC:
                case ODP_ACTION_ATTR_SET_DL_DST: