X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fvport-gre.c;h=d378ccb060e803b760deb87902e1e0daa7fad6f7;hb=9321954ac2ed1bdb5a397e2fab7ce591f9d883a9;hp=6f406bc9c36e37524c792419ee0d195fafbbaeee;hpb=2de795adb9632fc07ea49ced36eaa17c3f3fd106;p=openvswitch

diff --git a/datapath/vport-gre.c b/datapath/vport-gre.c
index 6f406bc9..d378ccb0 100644
--- a/datapath/vport-gre.c
+++ b/datapath/vport-gre.c
@@ -45,18 +45,51 @@ struct gre_base_hdr {
 	__be16 protocol;
 };
 
-static int gre_hdr_len(const struct tnl_mutable_config *mutable)
+static void get_gre_param(const struct tnl_mutable_config *mutable,
+			const struct ovs_key_ipv4_tunnel *tun_key,
+			u32 *flags, u32 *tunnel_type, __be64 *out_key)
+{
+	if (tun_key->ipv4_dst) {
+		*flags = 0;
+
+		if (tun_key->tun_flags & OVS_FLOW_TNL_F_KEY)
+			*flags = TNL_F_OUT_KEY_ACTION;
+		if (tun_key->tun_flags & OVS_FLOW_TNL_F_CSUM)
+			*flags |= TNL_F_CSUM;
+		*tunnel_type = TNL_T_PROTO_GRE;
+		*out_key = tun_key->tun_id;
+	} else {
+		*flags = mutable->flags;
+		*tunnel_type = mutable->key.tunnel_type;
+		if (mutable->flags & TNL_F_OUT_KEY_ACTION)
+			*out_key = tun_key->tun_id;
+		else
+			*out_key = mutable->out_key;
+
+	}
+}
+
+static int gre_hdr_len(const struct tnl_mutable_config *mutable,
+		       const struct ovs_key_ipv4_tunnel *tun_key)
 {
 	int len;
+	u32 flags;
+	u32 tunnel_type;
+	__be64 out_key;
 
+	get_gre_param(mutable, tun_key, &flags, &tunnel_type, &out_key);
 	len = GRE_HEADER_SECTION;
 
-	if (mutable->flags & TNL_F_CSUM)
+	if (flags & TNL_F_CSUM)
 		len += GRE_HEADER_SECTION;
 
-	if (mutable->out_key || mutable->flags & TNL_F_OUT_KEY_ACTION) {
+	/* Set key for GRE64 tunnels, even when key if is zero. */
+	if (out_key ||
+	    tunnel_type & TNL_T_PROTO_GRE64 ||
+	    flags & TNL_F_OUT_KEY_ACTION) {
+
 		len += GRE_HEADER_SECTION;
-		if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64)
+		if (tunnel_type & TNL_T_PROTO_GRE64)
 			len += GRE_HEADER_SECTION;
 	}
 	return len;
@@ -82,66 +115,46 @@ static __be32 be64_get_high32(__be64 x)
 #endif
 }
 
-static void gre_build_header(const struct vport *vport,
-			     const struct tnl_mutable_config *mutable,
-			     void *header)
-{
-	struct gre_base_hdr *greh = header;
-	__be32 *options = (__be32 *)(greh + 1);
-
-	greh->protocol = htons(ETH_P_TEB);
-	greh->flags = 0;
-
-	if (mutable->flags & TNL_F_CSUM) {
-		greh->flags |= GRE_CSUM;
-		*options = 0;
-		options++;
-	}
-
-	if (mutable->flags & TNL_F_OUT_KEY_ACTION) {
-		greh->flags |= GRE_KEY;
-		if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64)
-			greh->flags |= GRE_SEQ;
-
-	} else if (mutable->out_key) {
-		greh->flags |= GRE_KEY;
-		*options = be64_get_low32(mutable->out_key);
-		if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
-			options++;
-			*options = be64_get_high32(mutable->out_key);
-			greh->flags |= GRE_SEQ;
-		}
-	}
-}
-
-static struct sk_buff *gre_update_header(const struct vport *vport,
+static struct sk_buff *gre_build_header(const struct vport *vport,
 					 const struct tnl_mutable_config *mutable,
 					 struct dst_entry *dst,
-					 struct sk_buff *skb)
+					 struct sk_buff *skb,
+					 int tunnel_hlen)
 {
-	__be32 *options = (__be32 *)(skb_network_header(skb) + mutable->tunnel_hlen
+	u32 flags;
+	u32 tunnel_type;
+	__be64 out_key;
+	const struct ovs_key_ipv4_tunnel *tun_key = OVS_CB(skb)->tun_key;
+	__be32 *options = (__be32 *)(skb_network_header(skb) + tunnel_hlen
 					       - GRE_HEADER_SECTION);
+	struct gre_base_hdr *greh = (struct gre_base_hdr *) skb_transport_header(skb);
+
+	get_gre_param(mutable, tun_key, &flags, &tunnel_type, &out_key);
+
+	greh->protocol = htons(ETH_P_TEB);
+	greh->flags = 0;
 
 	/* Work backwards over the options so the checksum is last. */
-	if (mutable->flags & TNL_F_OUT_KEY_ACTION) {
-		if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
+	if (out_key || flags & TNL_F_OUT_KEY_ACTION || tunnel_type & TNL_T_PROTO_GRE64) {
+		greh->flags |= GRE_KEY;
+		if (tunnel_type & TNL_T_PROTO_GRE64) {
 			/* Set higher 32 bits to seq. */
-			*options = be64_get_high32(OVS_CB(skb)->tun_id);
+			*options = be64_get_high32(out_key);
 			options--;
+			greh->flags |= GRE_SEQ;
 		}
-		*options = be64_get_low32(OVS_CB(skb)->tun_id);
-		options--;
-	} else if (mutable->out_key) {
+		*options = be64_get_low32(out_key);
 		options--;
-		if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64)
-			options--;
 	}
 
-	if (mutable->flags & TNL_F_CSUM)
+	if (flags & TNL_F_CSUM) {
+		greh->flags |= GRE_CSUM;
+		*options = 0;
 		*(__sum16 *)options = csum_fold(skb_checksum(skb,
 						skb_transport_offset(skb),
 						skb->len - skb_transport_offset(skb),
 						0));
+	}
 	/*
 	 * Allow our local IP stack to fragment the outer packet even if the
 	 * DF bit is set as a last resort.  We also need to force selection of
@@ -202,8 +215,11 @@ static int parse_header(struct iphdr *iph, __be16 *flags, __be64 *tun_id,
 			*tunnel_type = TNL_T_PROTO_GRE;
 		}
 		*tun_id = key_to_tunnel_id(gre_key, seq);
-	} else
+	} else {
 		*tun_id = 0;
+		/* Ignore GRE seq if there is no key present. */
+		*tunnel_type = TNL_T_PROTO_GRE;
+	}
 
 	if (greh->flags & GRE_SEQ)
 		hdr_len += GRE_HEADER_SECTION;
@@ -326,7 +342,7 @@ static void gre_err(struct sk_buff *skb, u32 info)
 #endif
 
 	__skb_pull(skb, tunnel_hdr_len);
-	ovs_tnl_frag_needed(vport, mutable, skb, mtu, key);
+	ovs_tnl_frag_needed(vport, mutable, skb, mtu);
 	__skb_push(skb, tunnel_hdr_len);
 
 out:
@@ -361,6 +377,24 @@ static bool check_checksum(struct sk_buff *skb)
 	return (csum == 0);
 }
 
+static u32 gre_flags_to_tunnel_flags(const struct tnl_mutable_config *mutable,
+				     __be16 gre_flags)
+{
+	u32 tunnel_flags = 0;
+
+	if (gre_flags & GRE_KEY) {
+		if (mutable->key.daddr && (mutable->flags & TNL_F_IN_KEY_MATCH))
+			tunnel_flags = OVS_FLOW_TNL_F_KEY;
+		else if (!mutable->key.daddr)
+			tunnel_flags = OVS_FLOW_TNL_F_KEY;
+	}
+
+	if (gre_flags & GRE_CSUM)
+		tunnel_flags |= OVS_FLOW_TNL_F_CSUM;
+
+	return tunnel_flags;
+}
+
 /* Called with rcu_read_lock and BH disabled. */
 static int gre_rcv(struct sk_buff *skb)
 {
@@ -368,6 +402,7 @@ static int gre_rcv(struct sk_buff *skb)
 	const struct tnl_mutable_config *mutable;
 	int hdr_len;
 	struct iphdr *iph;
+	struct ovs_key_ipv4_tunnel tun_key;
 	__be16 flags;
 	__be64 key;
 	u32 tunnel_type;
@@ -392,15 +427,13 @@ static int gre_rcv(struct sk_buff *skb)
 		goto error;
 	}
 
-	if (mutable->flags & TNL_F_IN_KEY_MATCH)
-		OVS_CB(skb)->tun_id = key;
-	else
-		OVS_CB(skb)->tun_id = 0;
+	tnl_tun_key_init(&tun_key, iph, key, gre_flags_to_tunnel_flags(mutable, flags));
+	OVS_CB(skb)->tun_key = &tun_key;
 
 	__skb_pull(skb, hdr_len);
 	skb_postpull_rcsum(skb, skb_transport_header(skb), hdr_len + ETH_HLEN);
 
-	ovs_tnl_rcv(vport, skb, iph->tos);
+	ovs_tnl_rcv(vport, skb);
 	return 0;
 
 error:
@@ -413,7 +446,6 @@ static const struct tnl_ops gre_tnl_ops = {
 	.ipproto	= IPPROTO_GRE,
 	.hdr_len	= gre_hdr_len,
 	.build_header	= gre_build_header,
-	.update_header	= gre_update_header,
 };
 
 static struct vport *gre_create(const struct vport_parms *parms)
@@ -421,12 +453,16 @@ static struct vport *gre_create(const struct vport_parms *parms)
 	return ovs_tnl_create(parms, &ovs_gre_vport_ops, &gre_tnl_ops);
 }
 
+static struct vport *gre_create_ft(const struct vport_parms *parms)
+{
+	return ovs_tnl_create(parms, &ovs_gre_ft_vport_ops, &gre_tnl_ops);
+}
+
 static const struct tnl_ops gre64_tnl_ops = {
 	.tunnel_type	= TNL_T_PROTO_GRE64,
 	.ipproto	= IPPROTO_GRE,
 	.hdr_len	= gre_hdr_len,
 	.build_header	= gre_build_header,
-	.update_header	= gre_update_header,
 };
 
 static struct vport *gre_create64(const struct vport_parms *parms)
@@ -469,6 +505,24 @@ static void gre_exit(void)
 	inet_del_protocol(&gre_protocol_handlers, IPPROTO_GRE);
 }
 
+const struct vport_ops ovs_gre_ft_vport_ops = {
+	.type		= OVS_VPORT_TYPE_FT_GRE,
+	.flags		= VPORT_F_TUN_ID,
+	.init		= gre_init,
+	.exit		= gre_exit,
+	.create		= gre_create_ft,
+	.destroy	= ovs_tnl_destroy,
+	.set_addr	= ovs_tnl_set_addr,
+	.get_name	= ovs_tnl_get_name,
+	.get_addr	= ovs_tnl_get_addr,
+	.get_options	= ovs_tnl_get_options,
+	.set_options	= ovs_tnl_set_options,
+	.get_dev_flags	= ovs_vport_gen_get_dev_flags,
+	.is_running	= ovs_vport_gen_is_running,
+	.get_operstate	= ovs_vport_gen_get_operstate,
+	.send		= ovs_tnl_send,
+};
+
 const struct vport_ops ovs_gre_vport_ops = {
 	.type		= OVS_VPORT_TYPE_GRE,
 	.flags		= VPORT_F_TUN_ID,