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dpif-netlink-rtnl: Support VXLAN creation

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Creates VXLAN devices using rtnetlink and tunnel metadata.

Co-Authored-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: Eric Garver <e@erig.me>
Signed-off-by: Joe Stringer <joe@ovn.org>
This commit is contained in:
Eric Garver 2017-05-18 16:10:30 -04:00 committed by Joe Stringer
parent c4e087530e
commit 825e45e010
2 changed files with 72 additions and 9 deletions
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78
lib/dpif-netlink-rtnl.c
View File

@ -29,6 +29,18 @@
VLOG_DEFINE_THIS_MODULE(dpif_netlink_rtnl);
/* On some older systems, these enums are not defined. */
#ifndef IFLA_VXLAN_MAX
#define IFLA_VXLAN_MAX 0
#endif
#if IFLA_VXLAN_MAX < 25
#define IFLA_VXLAN_LEARNING 7
#define IFLA_VXLAN_PORT 15
#define IFLA_VXLAN_UDP_ZERO_CSUM6_RX 20
#define IFLA_VXLAN_GBP 23
#define IFLA_VXLAN_COLLECT_METADATA 25
#endif
static const struct nl_policy rtlink_policy[] = {
[IFLA_LINKINFO] = { .type = NL_A_NESTED },
};
@ -36,6 +48,12 @@ static const struct nl_policy linkinfo_policy[] = {
[IFLA_INFO_KIND] = { .type = NL_A_STRING },
[IFLA_INFO_DATA] = { .type = NL_A_NESTED },
};
static const struct nl_policy vxlan_policy[] = {
[IFLA_VXLAN_COLLECT_METADATA] = { .type = NL_A_U8 },
[IFLA_VXLAN_LEARNING] = { .type = NL_A_U8 },
[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] = { .type = NL_A_U8 },
[IFLA_VXLAN_PORT] = { .type = NL_A_U16 },
};
static const char *
vport_type_to_kind(enum ovs_vport_type type)
@ -84,13 +102,13 @@ dpif_netlink_rtnl_destroy(const char *name)
return rtnl_transact(RTM_DELLINK, NLM_F_REQUEST | NLM_F_ACK, name, NULL);
}
static int OVS_UNUSED
static int
dpif_netlink_rtnl_getlink(const char *name, struct ofpbuf **reply)
{
return rtnl_transact(RTM_GETLINK, NLM_F_REQUEST, name, reply);
}
static int OVS_UNUSED
static int
rtnl_policy_parse(const char *kind, struct ofpbuf *reply,
const struct nl_policy *policy,
struct nlattr *tnl_info[],
@ -116,8 +134,44 @@ rtnl_policy_parse(const char *kind, struct ofpbuf *reply,
}
static int
dpif_netlink_rtnl_verify(const struct netdev_tunnel_config OVS_UNUSED *tnl_cfg,
enum ovs_vport_type type, const char OVS_UNUSED *name)
dpif_netlink_rtnl_vxlan_verify(const struct netdev_tunnel_config *tnl_cfg,
const char *name, const char *kind)
{
struct ofpbuf *reply;
int err;
err = dpif_netlink_rtnl_getlink(name, &reply);
if (!err) {
struct nlattr *vxlan[ARRAY_SIZE(vxlan_policy)];
err = rtnl_policy_parse(kind, reply, vxlan_policy, vxlan,
ARRAY_SIZE(vxlan_policy));
if (!err) {
if (0 != nl_attr_get_u8(vxlan[IFLA_VXLAN_LEARNING])
|| 1 != nl_attr_get_u8(vxlan[IFLA_VXLAN_COLLECT_METADATA])
|| 1 != nl_attr_get_u8(vxlan[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])
|| (tnl_cfg->dst_port
!= nl_attr_get_be16(vxlan[IFLA_VXLAN_PORT]))) {
err = EINVAL;
}
}
if (!err) {
if (tnl_cfg->exts & (1 << OVS_VXLAN_EXT_GBP)
&& !nl_attr_get_flag(vxlan[IFLA_VXLAN_GBP])) {
err = EINVAL;
}
}
ofpbuf_delete(reply);
}
return err;
}
static int
dpif_netlink_rtnl_verify(const struct netdev_tunnel_config *tnl_cfg,
enum ovs_vport_type type, const char *name)
{
const char *kind;
@ -128,6 +182,7 @@ dpif_netlink_rtnl_verify(const struct netdev_tunnel_config OVS_UNUSED *tnl_cfg,
switch (type) {
case OVS_VPORT_TYPE_VXLAN:
return dpif_netlink_rtnl_vxlan_verify(tnl_cfg, name, kind);
case OVS_VPORT_TYPE_GRE:
case OVS_VPORT_TYPE_GENEVE:
case OVS_VPORT_TYPE_NETDEV:
@ -143,8 +198,8 @@ dpif_netlink_rtnl_verify(const struct netdev_tunnel_config OVS_UNUSED *tnl_cfg,
return 0;
}
static int OVS_UNUSED
dpif_netlink_rtnl_create(const struct netdev_tunnel_config OVS_UNUSED *tnl_cfg,
static int
dpif_netlink_rtnl_create(const struct netdev_tunnel_config *tnl_cfg,
const char *name, enum ovs_vport_type type,
const char *kind, uint32_t flags)
{
@ -166,6 +221,14 @@ dpif_netlink_rtnl_create(const struct netdev_tunnel_config OVS_UNUSED *tnl_cfg,
/* tunnel unique info */
switch (type) {
case OVS_VPORT_TYPE_VXLAN:
nl_msg_put_u8(&request, IFLA_VXLAN_LEARNING, 0);
nl_msg_put_u8(&request, IFLA_VXLAN_COLLECT_METADATA, 1);
nl_msg_put_u8(&request, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 1);
if (tnl_cfg->exts & (1 << OVS_VXLAN_EXT_GBP)) {
nl_msg_put_flag(&request, IFLA_VXLAN_GBP);
}
nl_msg_put_be16(&request, IFLA_VXLAN_PORT, tnl_cfg->dst_port);
break;
case OVS_VPORT_TYPE_GRE:
case OVS_VPORT_TYPE_GENEVE:
case OVS_VPORT_TYPE_NETDEV:
@ -254,10 +317,11 @@ dpif_netlink_rtnl_port_create(struct netdev *netdev)
}
int
dpif_netlink_rtnl_port_destroy(const char *name OVS_UNUSED, const char *type)
dpif_netlink_rtnl_port_destroy(const char *name, const char *type)
{
switch (netdev_to_ovs_vport_type(type)) {
case OVS_VPORT_TYPE_VXLAN:
return dpif_netlink_rtnl_destroy(name);
case OVS_VPORT_TYPE_GRE:
case OVS_VPORT_TYPE_GENEVE:
case OVS_VPORT_TYPE_NETDEV:

3
lib/dpif-netlink-rtnl.h
View File

@ -23,8 +23,7 @@
/* Declare these to keep sparse happy. */
int dpif_netlink_rtnl_port_create(struct netdev *netdev);
int dpif_netlink_rtnl_port_destroy(const char *name OVS_UNUSED,
const char *type);
int dpif_netlink_rtnl_port_destroy(const char *name, const char *type);
#ifndef __linux__
/* Dummy implementations for non Linux builds. */