/*
- * Copyright (c) 2007-2012 Nicira Networks.
+ * Copyright (c) 2007-2012 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
#include "datapath.h"
#include "tunnel.h"
#include "vport.h"
-#include "vport-generic.h"
/*
* The GRE header is composed of a series of sections: a base and then a variable
__be16 protocol;
};
-static int gre_hdr_len(const struct tnl_mutable_config *mutable)
+static int gre_hdr_len(const struct tnl_mutable_config *mutable,
+ const struct ovs_key_ipv4_tunnel *tun_key)
{
int len;
+ u32 flags;
+ __be64 out_key;
+ tnl_get_param(mutable, tun_key, &flags, &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)
- len += GRE_HEADER_SECTION;
+ /* Set key for GRE64 tunnels, even when key if is zero. */
+ if (out_key ||
+ mutable->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)
+ len += GRE_HEADER_SECTION;
+ }
return len;
}
+
/* Returns the least-significant 32 bits of a __be64. */
static __be32 be64_get_low32(__be64 x)
{
#endif
}
-static void gre_build_header(const struct vport *vport,
- const struct tnl_mutable_config *mutable,
- void *header)
+static __be32 be64_get_high32(__be64 x)
{
- 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->out_key || mutable->flags & TNL_F_OUT_KEY_ACTION)
- greh->flags |= GRE_KEY;
-
- if (mutable->out_key)
- *options = be64_get_low32(mutable->out_key);
+#ifdef __BIG_ENDIAN
+ return (__force __be32)((__force u64)x >> 32);
+#else
+ return (__force __be32)x;
+#endif
}
-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;
+ __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);
- /* 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);
+ tnl_get_param(mutable, tun_key, &flags, &out_key);
- if (mutable->out_key || mutable->flags & TNL_F_OUT_KEY_ACTION)
+ greh->protocol = htons(ETH_P_TEB);
+ greh->flags = 0;
+
+ /* Work backwards over the options so the checksum is last. */
+ if (out_key || flags & TNL_F_OUT_KEY_ACTION ||
+ mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
+ greh->flags |= GRE_KEY;
+ if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
+ /* Set higher 32 bits to seq. */
+ *options = be64_get_high32(out_key);
+ options--;
+ greh->flags |= GRE_SEQ;
+ }
+ *options = be64_get_low32(out_key);
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
return skb;
}
-/* Zero-extends a __be32 into the least-significant 32 bits of a __be64. */
-static __be64 be32_extend_to_be64(__be32 x)
+static __be64 key_to_tunnel_id(__be32 key, __be32 seq)
{
#ifdef __BIG_ENDIAN
- return (__force __be64)x;
+ return (__force __be64)((__force u64)seq << 32 | (__force u32)key);
#else
- return (__force __be64)((__force u64)x << 32);
+ return (__force __be64)((__force u64)key << 32 | (__force u32)seq);
#endif
}
-static int parse_header(struct iphdr *iph, __be16 *flags, __be64 *key)
+static int parse_header(struct iphdr *iph, __be16 *flags, __be64 *tun_id,
+ u32 *tunnel_type)
{
/* 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;
+ __be32 seq;
+ __be32 gre_key;
- *key = be32_extend_to_be64(*options);
+ gre_key = *options;
+ hdr_len += GRE_HEADER_SECTION;
options++;
- } else
- *key = 0;
- if (unlikely(greh->flags & GRE_SEQ))
+ if (greh->flags & GRE_SEQ) {
+ seq = *options;
+ *tunnel_type = TNL_T_PROTO_GRE64;
+ } else {
+ seq = 0;
+ *tunnel_type = TNL_T_PROTO_GRE;
+ }
+ *tun_id = key_to_tunnel_id(gre_key, seq);
+ } 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;
return hdr_len;
const int type = icmp_hdr(skb)->type;
const int code = icmp_hdr(skb)->code;
int mtu = ntohs(icmp_hdr(skb)->un.frag.mtu);
+ u32 tunnel_type;
struct iphdr *iph;
__be16 flags;
if (ipv4_is_multicast(iph->daddr))
return;
- tunnel_hdr_len = parse_header(iph, &flags, &key);
+ tunnel_hdr_len = parse_header(iph, &flags, &key, &tunnel_type);
if (tunnel_hdr_len < 0)
return;
vport = ovs_tnl_find_port(dev_net(skb->dev), iph->saddr, iph->daddr, key,
- TNL_T_PROTO_GRE, &mutable);
+ tunnel_type, &mutable);
if (!vport)
return;
#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:
return (csum == 0);
}
+static u32 gre_flags_to_tunnel_flags(const struct tnl_mutable_config *mutable,
+ __be16 gre_flags, __be64 *key)
+{
+ u32 tunnel_flags = 0;
+
+ if (gre_flags & GRE_KEY) {
+ if (mutable->flags & TNL_F_IN_KEY_MATCH ||
+ !mutable->key.daddr)
+ tunnel_flags = OVS_TNL_F_KEY;
+ else
+ *key = 0;
+ }
+
+ if (gre_flags & GRE_CSUM)
+ tunnel_flags |= OVS_TNL_F_CSUM;
+
+ return tunnel_flags;
+}
+
/* Called with rcu_read_lock and BH disabled. */
static int gre_rcv(struct sk_buff *skb)
{
const struct tnl_mutable_config *mutable;
int hdr_len;
struct iphdr *iph;
- __be16 flags;
+ struct ovs_key_ipv4_tunnel tun_key;
+ __be16 gre_flags;
+ u32 tnl_flags;
__be64 key;
+ u32 tunnel_type;
if (unlikely(!pskb_may_pull(skb, sizeof(struct gre_base_hdr) + ETH_HLEN)))
goto error;
-
if (unlikely(!check_checksum(skb)))
goto error;
- hdr_len = parse_header(ip_hdr(skb), &flags, &key);
+ hdr_len = parse_header(ip_hdr(skb), &gre_flags, &key, &tunnel_type);
if (unlikely(hdr_len < 0))
goto error;
iph = ip_hdr(skb);
vport = ovs_tnl_find_port(dev_net(skb->dev), iph->daddr, iph->saddr, key,
- TNL_T_PROTO_GRE, &mutable);
+ tunnel_type, &mutable);
if (unlikely(!vport)) {
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
goto error;
}
- if (mutable->flags & TNL_F_IN_KEY_MATCH)
- OVS_CB(skb)->tun_id = key;
- else
- OVS_CB(skb)->tun_id = 0;
+ tnl_flags = gre_flags_to_tunnel_flags(mutable, gre_flags, &key);
+ tnl_tun_key_init(&tun_key, iph, key, tnl_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:
.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)
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,
+};
+
+static struct vport *gre_create64(const struct vport_parms *parms)
+{
+ return ovs_tnl_create(parms, &ovs_gre64_vport_ops, &gre64_tnl_ops);
+}
+
static const struct net_protocol gre_protocol_handlers = {
.handler = gre_rcv,
.err_handler = gre_err,
#endif
};
+static bool inited;
+
static int gre_init(void)
{
int err;
+ if (inited)
+ return 0;
+
+ inited = true;
err = inet_add_protocol(&gre_protocol_handlers, IPPROTO_GRE);
if (err)
pr_warn("cannot register gre protocol handler\n");
static void gre_exit(void)
{
+ if (!inited)
+ return;
+
+ inited = false;
+
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,
+ .send = ovs_tnl_send,
+};
+
const struct vport_ops ovs_gre_vport_ops = {
.type = OVS_VPORT_TYPE_GRE,
.flags = VPORT_F_TUN_ID,
.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_gre64_vport_ops = {
+ .type = OVS_VPORT_TYPE_GRE64,
+ .flags = VPORT_F_TUN_ID,
+ .init = gre_init,
+ .exit = gre_exit,
+ .create = gre_create64,
+ .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,
.send = ovs_tnl_send,
};
git://git.onelab.eu / sliver-openvswitch.git / blobdiff