#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 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);
+ tnl_get_param(mutable, tun_key, &flags, &out_key);
len = GRE_HEADER_SECTION;
if (flags & TNL_F_CSUM)
/* Set key for GRE64 tunnels, even when key if is zero. */
if (out_key ||
- tunnel_type & TNL_T_PROTO_GRE64 ||
+ mutable->key.tunnel_type & TNL_T_PROTO_GRE64 ||
flags & TNL_F_OUT_KEY_ACTION) {
len += GRE_HEADER_SECTION;
- if (tunnel_type & TNL_T_PROTO_GRE64)
+ if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64)
len += GRE_HEADER_SECTION;
}
return len;
int 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);
+ tnl_get_param(mutable, tun_key, &flags, &out_key);
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 || tunnel_type & TNL_T_PROTO_GRE64) {
+ if (out_key || flags & TNL_F_OUT_KEY_ACTION ||
+ mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
greh->flags |= GRE_KEY;
- if (tunnel_type & TNL_T_PROTO_GRE64) {
+ if (mutable->key.tunnel_type & TNL_T_PROTO_GRE64) {
/* Set higher 32 bits to seq. */
*options = be64_get_high32(out_key);
options--;
return hdr_len;
}
-/* Called with rcu_read_lock and BH disabled. */
-static void gre_err(struct sk_buff *skb, u32 info)
-{
- struct vport *vport;
- const struct tnl_mutable_config *mutable;
- 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;
- __be64 key;
- int tunnel_hdr_len, tot_hdr_len;
- unsigned int orig_mac_header;
- unsigned int orig_nw_header;
-
- if (type != ICMP_DEST_UNREACH || code != ICMP_FRAG_NEEDED)
- return;
-
- /*
- * The mimimum size packet that we would actually be able to process:
- * encapsulating IP header, minimum GRE header, Ethernet header,
- * inner IPv4 header.
- */
- if (!pskb_may_pull(skb, sizeof(struct iphdr) + GRE_HEADER_SECTION +
- ETH_HLEN + sizeof(struct iphdr)))
- return;
-
- iph = (struct iphdr *)skb->data;
- if (ipv4_is_multicast(iph->daddr))
- return;
-
- 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,
- tunnel_type, &mutable);
- if (!vport)
- return;
-
- /*
- * Packets received by this function were previously sent by us, so
- * any comparisons should be to the output values, not the input.
- * However, it's not really worth it to have a hash table based on
- * output keys (especially since ICMP error handling of tunneled packets
- * isn't that reliable anyways). Therefore, we do a lookup based on the
- * 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->key.in_key != mutable->out_key)
- return;
-
- if (!!(mutable->flags & TNL_F_IN_KEY_MATCH) !=
- !!(mutable->flags & TNL_F_OUT_KEY_ACTION))
- return;
-
- if ((mutable->flags & TNL_F_CSUM) && !(flags & GRE_CSUM))
- return;
-
- tunnel_hdr_len += iph->ihl << 2;
-
- orig_mac_header = skb_mac_header(skb) - skb->data;
- orig_nw_header = skb_network_header(skb) - skb->data;
- skb_set_mac_header(skb, tunnel_hdr_len);
-
- tot_hdr_len = tunnel_hdr_len + ETH_HLEN;
-
- skb->protocol = eth_hdr(skb)->h_proto;
- if (skb->protocol == htons(ETH_P_8021Q)) {
- tot_hdr_len += VLAN_HLEN;
- skb->protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
- }
-
- skb_set_network_header(skb, tot_hdr_len);
- mtu -= tot_hdr_len;
-
- if (skb->protocol == htons(ETH_P_IP))
- tot_hdr_len += sizeof(struct iphdr);
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6))
- tot_hdr_len += sizeof(struct ipv6hdr);
-#endif
- else
- goto out;
-
- if (!pskb_may_pull(skb, tot_hdr_len))
- goto out;
-
- if (skb->protocol == htons(ETH_P_IP)) {
- if (mtu < IP_MIN_MTU) {
- if (ntohs(ip_hdr(skb)->tot_len) >= IP_MIN_MTU)
- mtu = IP_MIN_MTU;
- else
- goto out;
- }
-
- }
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- else if (skb->protocol == htons(ETH_P_IPV6)) {
- if (mtu < IPV6_MIN_MTU) {
- unsigned int packet_length = sizeof(struct ipv6hdr) +
- ntohs(ipv6_hdr(skb)->payload_len);
-
- if (packet_length >= IPV6_MIN_MTU
- || ntohs(ipv6_hdr(skb)->payload_len) == 0)
- mtu = IPV6_MIN_MTU;
- else
- goto out;
- }
- }
-#endif
-
- __skb_pull(skb, tunnel_hdr_len);
- ovs_tnl_frag_needed(vport, mutable, skb, mtu);
- __skb_push(skb, tunnel_hdr_len);
-
-out:
- skb_set_mac_header(skb, orig_mac_header);
- skb_set_network_header(skb, orig_nw_header);
- skb->protocol = htons(ETH_P_IP);
-}
-
static bool check_checksum(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
}
static u32 gre_flags_to_tunnel_flags(const struct tnl_mutable_config *mutable,
- __be16 gre_flags)
+ __be16 gre_flags, __be64 *key)
{
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 (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_FLOW_TNL_F_CSUM;
+ tunnel_flags |= OVS_TNL_F_CSUM;
return tunnel_flags;
}
int hdr_len;
struct iphdr *iph;
struct ovs_key_ipv4_tunnel tun_key;
- __be16 flags;
+ __be16 gre_flags;
+ u32 tnl_flags;
__be64 key;
u32 tunnel_type;
if (unlikely(!check_checksum(skb)))
goto error;
- hdr_len = parse_header(ip_hdr(skb), &flags, &key, &tunnel_type);
+ hdr_len = parse_header(ip_hdr(skb), &gre_flags, &key, &tunnel_type);
if (unlikely(hdr_len < 0))
goto error;
goto error;
}
- tnl_tun_key_init(&tun_key, iph, key, gre_flags_to_tunnel_flags(mutable, flags));
+ 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);
static const struct net_protocol gre_protocol_handlers = {
.handler = gre_rcv,
- .err_handler = gre_err,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
.netns_ok = 1,
#endif
.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,
};
.exit = gre_exit,
.create = gre_create,
.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,
};
.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,
- .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,
};
git://git.onelab.eu / sliver-openvswitch.git / blobdiff