X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Factions.c;h=a28e98662db314b23486b48d1f321c1b1a7f1aed;hb=cb4ef1ea12789af09fe9a6634012cf0f3797a56a;hp=8a3e8abb549e1302bdbed626bd889728bf2854f5;hpb=00908dc27a4d93bd1c5bda3bcdc84ec351e9a09a;p=openvswitch

diff --git a/datapath/actions.c b/datapath/actions.c
index 8a3e8abb..a28e9866 100644
--- a/datapath/actions.c
+++ b/datapath/actions.c
@@ -1,6 +1,6 @@
 /*
  * Distributed under the terms of the GNU GPL version 2.
- * Copyright (c) 2007, 2008, 2009 Nicira Networks.
+ * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks.
  *
  * Significant portions of this file may be copied from parts of the Linux
  * kernel, by Linus Torvalds and others.
@@ -8,417 +8,446 @@
 
 /* Functions for executing flow actions. */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/skbuff.h>
 #include <linux/in.h>
 #include <linux/ip.h>
+#include <linux/openvswitch.h>
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <linux/in6.h>
+#include <linux/if_arp.h>
 #include <linux/if_vlan.h>
+#include <net/inet_ecn.h>
 #include <net/ip.h>
 #include <net/checksum.h>
-#include "datapath.h"
-#include "dp_dev.h"
+
 #include "actions.h"
-#include "openvswitch/datapath-protocol.h"
+#include "checksum.h"
+#include "datapath.h"
+#include "vlan.h"
+#include "vport.h"
 
-struct sk_buff *
-make_writable(struct sk_buff *skb, gfp_t gfp)
+static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
+			const struct nlattr *attr, int len, bool keep_skb);
+
+static int make_writable(struct sk_buff *skb, int write_len)
 {
-	if (skb_shared(skb) || skb_cloned(skb)) {
-		struct sk_buff *nskb = skb_copy(skb, gfp);
-		if (nskb) {
-			kfree_skb(skb);
-			return nskb;
-		}
-	} else {
-		unsigned int hdr_len = (skb_transport_offset(skb)
-					+ sizeof(struct tcphdr));
-		if (pskb_may_pull(skb, min(hdr_len, skb->len)))
-			return skb;
-	}
-	kfree_skb(skb);
-	return NULL;
-}
+	if (!skb_cloned(skb) || skb_clone_writable(skb, write_len))
+		return 0;
 
+	return pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+}
 
-static struct sk_buff *
-vlan_pull_tag(struct sk_buff *skb)
+/* remove VLAN header from packet and update csum accrodingly. */
+static int __pop_vlan_tci(struct sk_buff *skb, __be16 *current_tci)
 {
-	struct vlan_ethhdr *vh = vlan_eth_hdr(skb);
 	struct ethhdr *eh;
+	struct vlan_ethhdr *veth;
+	int err;
+
+	err = make_writable(skb, VLAN_ETH_HLEN);
+	if (unlikely(err))
+		return err;
 
+	if (get_ip_summed(skb) == OVS_CSUM_COMPLETE)
+		skb->csum = csum_sub(skb->csum, csum_partial(skb->data
+					+ ETH_HLEN, VLAN_HLEN, 0));
 
-	/* Verify we were given a vlan packet */
-	if (vh->h_vlan_proto != htons(ETH_P_8021Q))
-		return skb;
+	veth = (struct vlan_ethhdr *) skb->data;
+	*current_tci = veth->h_vlan_TCI;
 
-	memmove(skb->data + VLAN_HLEN, skb->data, 2 * VLAN_ETH_ALEN);
+	memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN);
 
-	eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
+	eh = (struct ethhdr *)__skb_pull(skb, VLAN_HLEN);
 
 	skb->protocol = eh->h_proto;
 	skb->mac_header += VLAN_HLEN;
 
-	return skb;
+	return 0;
 }
 
-
-static struct sk_buff *
-modify_vlan_tci(struct datapath *dp, struct sk_buff *skb,
-		struct odp_flow_key *key, const union odp_action *a,
-		int n_actions, gfp_t gfp)
+static int pop_vlan(struct sk_buff *skb)
 {
-	u16 tci, mask;
-
-	if (a->type == ODPAT_SET_VLAN_VID) {
-		tci = ntohs(a->vlan_vid.vlan_vid);
-		mask = VLAN_VID_MASK;
-		key->dl_vlan = htons(tci & mask);
-	} else {
-		tci = a->vlan_pcp.vlan_pcp << 13;
-		mask = VLAN_PCP_MASK;
-	}
-
-	skb = make_writable(skb, gfp);
-	if (!skb)
-		return ERR_PTR(-ENOMEM);
+	__be16 tci;
+	int err;
 
-	if (skb->protocol == htons(ETH_P_8021Q)) {
-		/* Modify vlan id, but maintain other TCI values */
-		struct vlan_ethhdr *vh = vlan_eth_hdr(skb);
-		vh->h_vlan_TCI = htons((ntohs(vh->h_vlan_TCI) & ~mask) | tci);
+	if (likely(vlan_tx_tag_present(skb))) {
+		vlan_set_tci(skb, 0);
 	} else {
-		/* Add vlan header */
-
-		/* Set up checksumming pointers for checksum-deferred packets
-		 * on Xen.  Otherwise, dev_queue_xmit() will try to do this
-		 * when we send the packet out on the wire, and it will fail at
-		 * that point because skb_checksum_setup() will not look inside
-		 * an 802.1Q header. */
-		vswitch_skb_checksum_setup(skb);
-
-		/* GSO is not implemented for packets with an 802.1Q header, so
-		 * we have to do segmentation before we add that header.
-		 *
-		 * GSO does work with hardware-accelerated VLAN tagging, but we
-		 * can't use hardware-accelerated VLAN tagging since it
-		 * requires the device to have a VLAN group configured (with
-		 * e.g. vconfig(8)) and we don't do that.
-		 *
-		 * Having to do this here may be a performance loss, since we
-		 * can't take advantage of TSO hardware support, although it
-		 * does not make a measurable network performance difference
-		 * for 1G Ethernet.  Fixing that would require patching the
-		 * kernel (either to add GSO support to the VLAN protocol or to
-		 * support hardware-accelerated VLAN tagging without VLAN
-		 * groups configured). */
-		if (skb_is_gso(skb)) {
-			struct sk_buff *segs;
-
-			segs = skb_gso_segment(skb, 0);
-			kfree_skb(skb);
-			if (unlikely(IS_ERR(segs)))
-				return ERR_CAST(segs);
-
-			do {
-				struct sk_buff *nskb = segs->next;
-				int err;
-
-				segs->next = NULL;
-
-				segs = __vlan_put_tag(segs, tci);
-				err = -ENOMEM;
-				if (segs) {
-					struct odp_flow_key segkey = *key;
-					err = execute_actions(dp, segs,
-							      &segkey, a + 1,
-							      n_actions - 1,
-							      gfp);
-				}
-
-				if (unlikely(err)) {
-					while ((segs = nskb)) {
-						nskb = segs->next;
-						segs->next = NULL;
-						kfree_skb(segs);
-					}
-					return ERR_PTR(err);
-				}
-
-				segs = nskb;
-			} while (segs->next);
-
-			skb = segs;
-		}
+		if (unlikely(skb->protocol != htons(ETH_P_8021Q) ||
+		    skb->len < VLAN_ETH_HLEN))
+			return 0;
 
-		/* The hardware-accelerated version of vlan_put_tag() works
-		 * only for a device that has a VLAN group configured (with
-		 * e.g. vconfig(8)), so call the software-only version
-		 * __vlan_put_tag() directly instead.
-		 */
-		skb = __vlan_put_tag(skb, tci);
-		if (!skb)
-			return ERR_PTR(-ENOMEM);
+		err = __pop_vlan_tci(skb, &tci);
+		if (err)
+			return err;
 	}
+	/* move next vlan tag to hw accel tag */
+	if (likely(skb->protocol != htons(ETH_P_8021Q) ||
+	    skb->len < VLAN_ETH_HLEN))
+		return 0;
 
-	return skb;
-}
+	err = __pop_vlan_tci(skb, &tci);
+	if (unlikely(err))
+		return err;
 
-static struct sk_buff *strip_vlan(struct sk_buff *skb,
-				  struct odp_flow_key *key, gfp_t gfp)
-{
-	skb = make_writable(skb, gfp);
-	if (skb) {
-		vlan_pull_tag(skb);
-		key->dl_vlan = htons(ODP_VLAN_NONE);
-	}
-	return skb;
+	__vlan_hwaccel_put_tag(skb, ntohs(tci));
+	return 0;
 }
 
-static struct sk_buff *set_dl_addr(struct sk_buff *skb,
-				   const struct odp_action_dl_addr *a,
-				   gfp_t gfp)
+static int push_vlan(struct sk_buff *skb, __be16 new_tci)
 {
-	skb = make_writable(skb, gfp);
-	if (skb) {
-		struct ethhdr *eh = eth_hdr(skb);
-		memcpy(a->type == ODPAT_SET_DL_SRC ? eh->h_source : eh->h_dest,
-		       a->dl_addr, ETH_ALEN);
+	if (unlikely(vlan_tx_tag_present(skb))) {
+		u16 current_tag;
+
+		/* push down current VLAN tag */
+		current_tag = vlan_tx_tag_get(skb);
+
+		if (!__vlan_put_tag(skb, current_tag))
+			return -ENOMEM;
+
+		if (get_ip_summed(skb) == OVS_CSUM_COMPLETE)
+			skb->csum = csum_add(skb->csum, csum_partial(skb->data
+					+ ETH_HLEN, VLAN_HLEN, 0));
+
 	}
-	return skb;
+	__vlan_hwaccel_put_tag(skb, ntohs(new_tci));
+	return 0;
 }
 
-/* Updates 'sum', which is a field in 'skb''s data, given that a 4-byte field
- * covered by the sum has been changed from 'from' to 'to'.  If set,
- * 'pseudohdr' indicates that the field is in the TCP or UDP pseudo-header.
- * Based on nf_proto_csum_replace4. */
-static void update_csum(__sum16 *sum, struct sk_buff *skb,
-			__be32 from, __be32 to, int pseudohdr)
+static bool is_ip(struct sk_buff *skb)
 {
-	__be32 diff[] = { ~from, to };
-	if (skb->ip_summed != CHECKSUM_PARTIAL) {
-		*sum = csum_fold(csum_partial((char *)diff, sizeof(diff),
-				~csum_unfold(*sum)));
-		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
-			skb->csum = ~csum_partial((char *)diff, sizeof(diff),
-						~skb->csum);
-	} else if (pseudohdr)
-		*sum = ~csum_fold(csum_partial((char *)diff, sizeof(diff),
-				csum_unfold(*sum)));
+	return (OVS_CB(skb)->flow->key.eth.type == htons(ETH_P_IP) &&
+		skb->transport_header > skb->network_header);
 }
 
-static struct sk_buff *set_nw_addr(struct sk_buff *skb,
-				   struct odp_flow_key *key,
-				   const struct odp_action_nw_addr *a,
-				   gfp_t gfp)
+static __sum16 *get_l4_checksum(struct sk_buff *skb)
 {
-	if (key->dl_type != htons(ETH_P_IP))
-		return skb;
-
-	skb = make_writable(skb, gfp);
-	if (skb) {
-		struct iphdr *nh = ip_hdr(skb);
-		u32 *f = a->type == ODPAT_SET_NW_SRC ? &nh->saddr : &nh->daddr;
-		u32 old = *f;
-		u32 new = a->nw_addr;
-
-		if (key->nw_proto == IPPROTO_TCP) {
-			struct tcphdr *th = tcp_hdr(skb);
-			update_csum(&th->check, skb, old, new, 1);
-		} else if (key->nw_proto == IPPROTO_UDP) {
-			struct udphdr *th = udp_hdr(skb);
-			update_csum(&th->check, skb, old, new, 1);
-		}
-		update_csum(&nh->check, skb, old, new, 0);
-		*f = new;
+	u8 nw_proto = OVS_CB(skb)->flow->key.ip.proto;
+	int transport_len = skb->len - skb_transport_offset(skb);
+	if (nw_proto == IPPROTO_TCP) {
+		if (likely(transport_len >= sizeof(struct tcphdr)))
+			return &tcp_hdr(skb)->check;
+	} else if (nw_proto == IPPROTO_UDP) {
+		if (likely(transport_len >= sizeof(struct udphdr)))
+			return &udp_hdr(skb)->check;
 	}
-	return skb;
+	return NULL;
 }
 
-static struct sk_buff *
-set_tp_port(struct sk_buff *skb, struct odp_flow_key *key,
-	    const struct odp_action_tp_port *a,
-	    gfp_t gfp)
+static int set_nw_addr(struct sk_buff *skb, const struct nlattr *a)
 {
-	int check_ofs;
-
-	if (key->dl_type != htons(ETH_P_IP))
-		return skb;
-
-	if (key->nw_proto == IPPROTO_TCP)
-		check_ofs = offsetof(struct tcphdr, check);
-	else if (key->nw_proto == IPPROTO_UDP)
-		check_ofs = offsetof(struct udphdr, check);
-	else
-		return skb;
-
-	skb = make_writable(skb, gfp);
-	if (skb) {
-		struct udphdr *th = udp_hdr(skb);
-		u16 *f = a->type == ODPAT_SET_TP_SRC ? &th->source : &th->dest;
-		u16 old = *f;
-		u16 new = a->tp_port;
-		update_csum((u16*)((u8*)skb->data + check_ofs),
-			    skb, old, new, 1);
-		*f = new;
-	}
-	return skb;
-}
+	__be32 new_nwaddr = nla_get_be32(a);
+	struct iphdr *nh;
+	__sum16 *check;
+	__be32 *nwaddr;
+	int err;
 
-static inline unsigned packet_length(const struct sk_buff *skb)
-{
-	unsigned length = skb->len - ETH_HLEN;
-	if (skb->protocol == htons(ETH_P_8021Q))
-		length -= VLAN_HLEN;
-	return length;
+	if (unlikely(!is_ip(skb)))
+		return 0;
+
+	err = make_writable(skb, skb_network_offset(skb) +
+				 sizeof(struct iphdr));
+	if (unlikely(err))
+		return err;
+
+	nh = ip_hdr(skb);
+	nwaddr = nla_type(a) == OVS_ACTION_ATTR_SET_NW_SRC ? &nh->saddr : &nh->daddr;
+
+	check = get_l4_checksum(skb);
+	if (likely(check))
+		inet_proto_csum_replace4(check, skb, *nwaddr, new_nwaddr, 1);
+	csum_replace4(&nh->check, *nwaddr, new_nwaddr);
+
+	skb_clear_rxhash(skb);
+
+	*nwaddr = new_nwaddr;
+
+	return 0;
 }
 
-int dp_xmit_skb(struct sk_buff *skb)
+static int set_nw_tos(struct sk_buff *skb, u8 nw_tos)
 {
-	struct datapath *dp = skb->dev->br_port->dp;
-	int len = skb->len;
+	struct iphdr *nh = ip_hdr(skb);
+	u8 old, new;
+	int err;
 
-	if (packet_length(skb) > skb->dev->mtu && !skb_is_gso(skb)) {
-		printk(KERN_WARNING "%s: dropped over-mtu packet: %d > %d\n",
-		       dp_name(dp), packet_length(skb), skb->dev->mtu);
-		kfree_skb(skb);
-		return -E2BIG;
-	}
+	if (unlikely(!is_ip(skb)))
+		return 0;
 
-	dev_queue_xmit(skb);
+	err = make_writable(skb, skb_network_offset(skb) +
+				 sizeof(struct iphdr));
+	if (unlikely(err))
+		return err;
 
-	return len;
+	/* Set the DSCP bits and preserve the ECN bits. */
+	old = nh->tos;
+	new = nw_tos | (nh->tos & INET_ECN_MASK);
+	csum_replace4(&nh->check, (__force __be32)old,
+				  (__force __be32)new);
+	nh->tos = new;
+
+	return 0;
 }
 
-static void
-do_output(struct datapath *dp, struct sk_buff *skb, int out_port)
+static int set_tp_port(struct sk_buff *skb, const struct nlattr *a)
 {
-	struct net_bridge_port *p;
-	struct net_device *dev;
+	struct udphdr *th;
+	__sum16 *check;
+	__be16 *port;
+	int err;
 
-	if (!skb)
-		goto error;
+	if (unlikely(!is_ip(skb)))
+		return 0;
+
+	err = make_writable(skb, skb_transport_offset(skb) +
+				 sizeof(struct tcphdr));
+	if (unlikely(err))
+		return err;
+
+	/* Must follow make_writable() since that can move the skb data. */
+	check = get_l4_checksum(skb);
+	if (unlikely(!check))
+		return 0;
+
+	/*
+	 * Update port and checksum.
+	 *
+	 * This is OK because source and destination port numbers are at the
+	 * same offsets in both UDP and TCP headers, and get_l4_checksum() only
+	 * supports those protocols.
+	 */
+	th = udp_hdr(skb);
+	port = nla_type(a) == OVS_ACTION_ATTR_SET_TP_SRC ? &th->source : &th->dest;
+	inet_proto_csum_replace2(check, skb, *port, nla_get_be16(a), 0);
+	*port = nla_get_be16(a);
+	skb_clear_rxhash(skb);
 
-	p = dp->ports[out_port];
-	if (!p)
-		goto error;
+	return 0;
+}
 
-	dev = skb->dev = p->dev;
-	if (is_dp_dev(dev))
-		dp_dev_recv(dev, skb);
-        else
-		dp_xmit_skb(skb);
-	return;
+static int do_output(struct datapath *dp, struct sk_buff *skb, int out_port)
+{
+	struct vport *vport;
 
-error:
-	kfree_skb(skb);
+	if (unlikely(!skb))
+		return -ENOMEM;
+
+	vport = rcu_dereference(dp->ports[out_port]);
+	if (unlikely(!vport)) {
+		kfree_skb(skb);
+		return -ENODEV;
+	}
+
+	vport_send(vport, skb);
+	return 0;
 }
 
-/* Never consumes 'skb'.  Returns a port that 'skb' should be sent to, -1 if
- * none.  */
-static int output_group(struct datapath *dp, __u16 group,
-			struct sk_buff *skb, gfp_t gfp)
+static int output_userspace(struct datapath *dp, struct sk_buff *skb,
+			    const struct nlattr *attr)
 {
-	struct dp_port_group *g = rcu_dereference(dp->groups[group]);
-	int prev_port = -1;
-	int i;
-
-	if (!g)
-		return -1;
-	for (i = 0; i < g->n_ports; i++) {
-		struct net_bridge_port *p = dp->ports[g->ports[i]];
-		if (!p || skb->dev == p->dev)
-			continue;
-		if (prev_port != -1) {
-			struct sk_buff *clone = skb_clone(skb, gfp);
-			if (!clone)
-				return -1;
-			do_output(dp, clone, prev_port);
+	struct dp_upcall_info upcall;
+	const struct nlattr *a;
+	int rem;
+
+	upcall.cmd = OVS_PACKET_CMD_ACTION;
+	upcall.key = &OVS_CB(skb)->flow->key;
+	upcall.userdata = NULL;
+	upcall.pid = 0;
+
+	for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
+		 a = nla_next(a, &rem)) {
+		switch (nla_type(a)) {
+		case OVS_USERSPACE_ATTR_USERDATA:
+			upcall.userdata = a;
+			break;
+
+		case OVS_USERSPACE_ATTR_PID:
+			upcall.pid = nla_get_u32(a);
+			break;
 		}
-		prev_port = p->port_no;
 	}
-	return prev_port;
+
+	return dp_upcall(dp, skb, &upcall);
 }
 
-static int
-output_control(struct datapath *dp, struct sk_buff *skb, u32 arg, gfp_t gfp)
+static int sample(struct datapath *dp, struct sk_buff *skb,
+		  const struct nlattr *attr)
 {
-	skb = skb_clone(skb, gfp);
-	if (!skb)
-		return -ENOMEM;
-	return dp_output_control(dp, skb, _ODPL_ACTION_NR, arg);
+	const struct nlattr *acts_list = NULL;
+	const struct nlattr *a;
+	int rem;
+
+	for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
+		 a = nla_next(a, &rem)) {
+		switch (nla_type(a)) {
+		case OVS_SAMPLE_ATTR_PROBABILITY:
+			if (net_random() >= nla_get_u32(a))
+				return 0;
+			break;
+
+		case OVS_SAMPLE_ATTR_ACTIONS:
+			acts_list = a;
+			break;
+		}
+	}
+
+	return do_execute_actions(dp, skb, nla_data(acts_list),
+						 nla_len(acts_list), true);
 }
 
 /* Execute a list of actions against 'skb'. */
-int execute_actions(struct datapath *dp, struct sk_buff *skb,
-		    struct odp_flow_key *key,
-		    const union odp_action *a, int n_actions,
-		    gfp_t gfp)
+static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
+			const struct nlattr *attr, int len, bool keep_skb)
 {
 	/* Every output action needs a separate clone of 'skb', but the common
 	 * case is just a single output action, so that doing a clone and
 	 * then freeing the original skbuff is wasteful.  So the following code
 	 * is slightly obscure just to avoid that. */
 	int prev_port = -1;
-	int err;
-	for (; n_actions > 0; a++, n_actions--) {
-		WARN_ON_ONCE(skb_shared(skb));
+	u32 priority = skb->priority;
+	const struct nlattr *a;
+	int rem;
+
+	for (a = attr, rem = len; rem > 0;
+	     a = nla_next(a, &rem)) {
+		int err = 0;
+
 		if (prev_port != -1) {
-			do_output(dp, skb_clone(skb, gfp), prev_port);
+			do_output(dp, skb_clone(skb, GFP_ATOMIC), prev_port);
 			prev_port = -1;
 		}
 
-		switch (a->type) {
-		case ODPAT_OUTPUT:
-			prev_port = a->output.port;
+		switch (nla_type(a)) {
+		case OVS_ACTION_ATTR_OUTPUT:
+			prev_port = nla_get_u32(a);
 			break;
 
-		case ODPAT_OUTPUT_GROUP:
-			prev_port = output_group(dp, a->output_group.group,
-						 skb, gfp);
+		case OVS_ACTION_ATTR_USERSPACE:
+			output_userspace(dp, skb, a);
 			break;
 
-		case ODPAT_CONTROLLER:
-			err = output_control(dp, skb, a->controller.arg, gfp);
-			if (err) {
-				kfree_skb(skb);
+		case OVS_ACTION_ATTR_SET_TUNNEL:
+			OVS_CB(skb)->tun_id = nla_get_be64(a);
+			break;
+
+		case OVS_ACTION_ATTR_PUSH_VLAN:
+			err = push_vlan(skb, nla_get_be16(a));
+			if (unlikely(err)) /* skb already freed */
 				return err;
-			}
 			break;
 
-		case ODPAT_SET_VLAN_VID:
-		case ODPAT_SET_VLAN_PCP:
-			skb = modify_vlan_tci(dp, skb, key, a, n_actions, gfp);
-			if (IS_ERR(skb))
-				return PTR_ERR(skb);
+		case OVS_ACTION_ATTR_POP_VLAN:
+			err = pop_vlan(skb);
+			break;
+
+		case OVS_ACTION_ATTR_SET_DL_SRC:
+			err = make_writable(skb, ETH_HLEN);
+			if (likely(!err))
+				memcpy(eth_hdr(skb)->h_source, nla_data(a), ETH_ALEN);
 			break;
 
-		case ODPAT_STRIP_VLAN:
-			skb = strip_vlan(skb, key, gfp);
+		case OVS_ACTION_ATTR_SET_DL_DST:
+			err = make_writable(skb, ETH_HLEN);
+			if (likely(!err))
+				memcpy(eth_hdr(skb)->h_dest, nla_data(a), ETH_ALEN);
 			break;
 
-		case ODPAT_SET_DL_SRC:
-		case ODPAT_SET_DL_DST:
-			skb = set_dl_addr(skb, &a->dl_addr, gfp);
+		case OVS_ACTION_ATTR_SET_NW_SRC:
+		case OVS_ACTION_ATTR_SET_NW_DST:
+			err = set_nw_addr(skb, a);
 			break;
 
-		case ODPAT_SET_NW_SRC:
-		case ODPAT_SET_NW_DST:
-			skb = set_nw_addr(skb, key, &a->nw_addr, gfp);
+		case OVS_ACTION_ATTR_SET_NW_TOS:
+			err = set_nw_tos(skb, nla_get_u8(a));
 			break;
 
-		case ODPAT_SET_TP_SRC:
-		case ODPAT_SET_TP_DST:
-			skb = set_tp_port(skb, key, &a->tp_port, gfp);
+		case OVS_ACTION_ATTR_SET_TP_SRC:
+		case OVS_ACTION_ATTR_SET_TP_DST:
+			err = set_tp_port(skb, a);
 			break;
+
+		case OVS_ACTION_ATTR_SET_PRIORITY:
+			skb->priority = nla_get_u32(a);
+			break;
+
+		case OVS_ACTION_ATTR_POP_PRIORITY:
+			skb->priority = priority;
+			break;
+
+		case OVS_ACTION_ATTR_SAMPLE:
+			err = sample(dp, skb, a);
+			break;
+
+		}
+		if (unlikely(err)) {
+			kfree_skb(skb);
+			return err;
 		}
-		if (!skb)
-			return -ENOMEM;
 	}
-	if (prev_port != -1)
+
+	if (prev_port != -1) {
+		if (keep_skb)
+			skb = skb_clone(skb, GFP_ATOMIC);
+
 		do_output(dp, skb, prev_port);
-	else
-		kfree_skb(skb);
+	} else if (!keep_skb)
+		consume_skb(skb);
+
 	return 0;
 }
+
+/* We limit the number of times that we pass into execute_actions()
+ * to avoid blowing out the stack in the event that we have a loop. */
+#define MAX_LOOPS 5
+
+struct loop_counter {
+	u8 count;		/* Count. */
+	bool looping;		/* Loop detected? */
+};
+
+static DEFINE_PER_CPU(struct loop_counter, loop_counters);
+
+static int loop_suppress(struct datapath *dp, struct sw_flow_actions *actions)
+{
+	if (net_ratelimit())
+		pr_warn("%s: flow looped %d times, dropping\n",
+				dp_name(dp), MAX_LOOPS);
+	actions->actions_len = 0;
+	return -ELOOP;
+}
+
+/* Execute a list of actions against 'skb'. */
+int execute_actions(struct datapath *dp, struct sk_buff *skb)
+{
+	struct sw_flow_actions *acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts);
+	struct loop_counter *loop;
+	int error;
+
+	/* Check whether we've looped too much. */
+	loop = &__get_cpu_var(loop_counters);
+	if (unlikely(++loop->count > MAX_LOOPS))
+		loop->looping = true;
+	if (unlikely(loop->looping)) {
+		error = loop_suppress(dp, acts);
+		kfree_skb(skb);
+		goto out_loop;
+	}
+
+	OVS_CB(skb)->tun_id = 0;
+	error = do_execute_actions(dp, skb, acts->actions,
+					 acts->actions_len, false);
+
+	/* Check whether sub-actions looped too much. */
+	if (unlikely(loop->looping))
+		error = loop_suppress(dp, acts);
+
+out_loop:
+	/* Decrement loop counter. */
+	if (!--loop->count)
+		loop->looping = false;
+
+	return error;
+}