/*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011 Nicira Networks.
* Distributed under the terms of the GNU GPL version 2.
*
* Significant portions of this file may be copied from parts of the Linux
* kernel, by Linus Torvalds and others.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/if.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
__be16 protocol;
};
-static int gre_hdr_len(const struct tnl_port_config *port_config)
+static int gre_hdr_len(const struct tnl_mutable_config *mutable)
{
int len;
len = GRE_HEADER_SECTION;
- if (port_config->flags & TNL_F_CSUM)
+ if (mutable->flags & TNL_F_CSUM)
len += GRE_HEADER_SECTION;
- if (port_config->out_key ||
- port_config->flags & TNL_F_OUT_KEY_ACTION)
+ if (mutable->out_key || mutable->flags & TNL_F_OUT_KEY_ACTION)
len += GRE_HEADER_SECTION;
return len;
}
-static struct sk_buff *gre_build_header(struct sk_buff *skb,
- const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- struct dst_entry *dst)
+/* Returns the least-significant 32 bits of a __be64. */
+static __be32 be64_get_low32(__be64 x)
{
- struct gre_base_hdr *greh = (struct gre_base_hdr *)skb_transport_header(skb);
- __be32 *options = (__be32 *)(skb_network_header(skb) + mutable->tunnel_hlen
- - GRE_HEADER_SECTION);
+#ifdef __BIG_ENDIAN
+ return (__force __be32)x;
+#else
+ return (__force __be32)((__force u64)x >> 32);
+#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;
- /* Work backwards over the options so the checksum is last. */
- if (mutable->port_config.out_key ||
- mutable->port_config.flags & TNL_F_OUT_KEY_ACTION) {
+ if (mutable->flags & TNL_F_CSUM) {
+ greh->flags |= GRE_CSUM;
+ *options = 0;
+ options++;
+ }
+
+ if (mutable->out_key || mutable->flags & TNL_F_OUT_KEY_ACTION)
greh->flags |= GRE_KEY;
- if (mutable->port_config.flags & TNL_F_OUT_KEY_ACTION)
- *options = OVS_CB(skb)->tun_id;
- else
- *options = mutable->port_config.out_key;
+ if (mutable->out_key)
+ *options = be64_get_low32(mutable->out_key);
+}
+static struct sk_buff *gre_update_header(const struct vport *vport,
+ const struct tnl_mutable_config *mutable,
+ struct dst_entry *dst,
+ struct sk_buff *skb)
+{
+ __be32 *options = (__be32 *)(skb_network_header(skb) + mutable->tunnel_hlen
+ - GRE_HEADER_SECTION);
+
+ /* Work backwards over the options so the checksum is last. */
+ if (mutable->flags & TNL_F_OUT_KEY_ACTION) {
+ *options = be64_get_low32(OVS_CB(skb)->tun_id);
options--;
}
- if (mutable->port_config.flags & TNL_F_CSUM) {
- greh->flags |= GRE_CSUM;
-
- *options = 0;
+ if (mutable->flags & TNL_F_CSUM)
*(__sum16 *)options = csum_fold(skb_checksum(skb,
- sizeof(struct iphdr),
- skb->len - sizeof(struct iphdr),
+ 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.
+ * DF bit is set as a last resort. We also need to force selection of
+ * an IP ID here because Linux will otherwise leave it at 0 if the
+ * packet originally had DF set.
*/
skb->local_df = 1;
+ __ip_select_ident(ip_hdr(skb), dst, 0);
return skb;
}
-static int parse_header(struct iphdr *iph, __be16 *flags, __be32 *key)
+/* Zero-extends a __be32 into the least-significant 32 bits of a __be64. */
+static __be64 be32_extend_to_be64(__be32 x)
+{
+#ifdef __BIG_ENDIAN
+ return (__force __be64)x;
+#else
+ return (__force __be64)((__force u64)x << 32);
+#endif
+}
+
+static int parse_header(struct iphdr *iph, __be16 *flags, __be64 *key)
{
/* IP and ICMP protocol handlers check that the IHL is valid. */
struct gre_base_hdr *greh = (struct gre_base_hdr *)((u8 *)iph + (iph->ihl << 2));
if (greh->flags & GRE_KEY) {
hdr_len += GRE_HEADER_SECTION;
- *key = *options;
+ *key = be32_extend_to_be64(*options);
options++;
} else
*key = 0;
struct iphdr *iph;
__be16 flags;
- __be32 key;
+ __be64 key;
int tunnel_hdr_len, tot_hdr_len;
unsigned int orig_mac_header;
unsigned int orig_nw_header;
* out key as if it were the in key and then check to see if the input
* and output keys are the same.
*/
- if (mutable->port_config.in_key != mutable->port_config.out_key)
+ if (mutable->in_key != mutable->out_key)
return;
- if (!!(mutable->port_config.flags & TNL_F_IN_KEY_MATCH) !=
- !!(mutable->port_config.flags & TNL_F_OUT_KEY_ACTION))
+ if (!!(mutable->flags & TNL_F_IN_KEY_MATCH) !=
+ !!(mutable->flags & TNL_F_OUT_KEY_ACTION))
return;
- if ((mutable->port_config.flags & TNL_F_CSUM) && !(flags & GRE_CSUM))
+ if ((mutable->flags & TNL_F_CSUM) && !(flags & GRE_CSUM))
return;
tunnel_hdr_len += iph->ihl << 2;
int hdr_len;
struct iphdr *iph;
__be16 flags;
- __be32 key;
+ __be64 key;
if (unlikely(!pskb_may_pull(skb, sizeof(struct gre_base_hdr) + ETH_HLEN)))
goto error;
goto error;
}
- if (mutable->port_config.flags & TNL_F_IN_KEY_MATCH)
+ if (mutable->flags & TNL_F_IN_KEY_MATCH)
OVS_CB(skb)->tun_id = key;
else
OVS_CB(skb)->tun_id = 0;
__skb_pull(skb, hdr_len);
skb_postpull_rcsum(skb, skb_transport_header(skb), hdr_len + ETH_HLEN);
- tnl_rcv(vport, skb);
+ tnl_rcv(vport, skb, iph->tos);
return 0;
error:
return 0;
}
-struct tnl_ops gre_tnl_ops = {
+static const struct tnl_ops gre_tnl_ops = {
.tunnel_type = TNL_T_PROTO_GRE,
.ipproto = IPPROTO_GRE,
.hdr_len = gre_hdr_len,
.build_header = gre_build_header,
+ .update_header = gre_update_header,
};
-static struct vport *gre_create(const char *name, const void __user *config)
+static struct vport *gre_create(const struct vport_parms *parms)
{
- return tnl_create(name, config, &gre_vport_ops, &gre_tnl_ops);
+ return tnl_create(parms, &gre_vport_ops, &gre_tnl_ops);
}
-static struct net_protocol gre_protocol_handlers = {
+static const struct net_protocol gre_protocol_handlers = {
.handler = gre_rcv,
.err_handler = gre_err,
};
int err;
err = inet_add_protocol(&gre_protocol_handlers, IPPROTO_GRE);
- if (err) {
- printk(KERN_WARNING "openvswitch: cannot register gre protocol handler\n");
- goto out;
- }
+ if (err)
+ pr_warn("cannot register gre protocol handler\n");
- err = tnl_init();
-
-out:
return err;
}
static void gre_exit(void)
{
- tnl_exit();
inet_del_protocol(&gre_protocol_handlers, IPPROTO_GRE);
}
-struct vport_ops gre_vport_ops = {
- .type = "gre",
- .flags = VPORT_F_GEN_STATS | VPORT_F_TUN_ID,
+const struct vport_ops gre_vport_ops = {
+ .type = OVS_VPORT_TYPE_GRE,
+ .flags = VPORT_F_TUN_ID,
.init = gre_init,
.exit = gre_exit,
.create = gre_create,
- .modify = tnl_modify,
.destroy = tnl_destroy,
- .set_mtu = tnl_set_mtu,
.set_addr = tnl_set_addr,
.get_name = tnl_get_name,
.get_addr = tnl_get_addr,
+ .get_options = tnl_get_options,
+ .set_options = tnl_set_options,
.get_dev_flags = vport_gen_get_dev_flags,
.is_running = vport_gen_is_running,
.get_operstate = vport_gen_get_operstate,
- .get_mtu = tnl_get_mtu,
.send = tnl_send,
};
git://git.onelab.eu / sliver-openvswitch.git / blobdiff