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openvswitch: Extend packet attribute for egress tunnel info

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OVS vswitch has extended IPFIX exporter to export tunnel headers
to improve network visibility.
To export this information userspace needs to know egress tunnel
for given packet. By extending packet attributes datapath can
export egress tunnel info for given packet. So that userspace
can ask for egress tunnel info in userspace action. This
information is used to build IPFIX data for given flow.

Signed-off-by: Wenyu Zhang <wenyuz@vmware.com>
Acked-by: Romain Lenglet <rlenglet@vmware.com>
Acked-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Wenyu Zhang 2014-11-06 06:51:24 -08:00 • committed by Pravin B Shelar
parent 9ba559d9ca
commit 8f0aad6f35
12 changed files with 275 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

62
net/openvswitch/flow.h
View file

@ -37,8 +37,8 @@ struct sk_buff;
/* Used to memset ovs_key_ipv4_tunnel padding. */
#define OVS_TUNNEL_KEY_SIZE \
(offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \
FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
(offsetof(struct ovs_key_ipv4_tunnel, tp_dst) + \
FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, tp_dst))
struct ovs_key_ipv4_tunnel {
__be64 tun_id;
@ -47,6 +47,8 @@ struct ovs_key_ipv4_tunnel {
__be16 tun_flags;
u8 ipv4_tos;
u8 ipv4_ttl;
__be16 tp_src;
__be16 tp_dst;
} __packed __aligned(4); /* Minimize padding. */
struct ovs_tunnel_info {
@ -64,27 +66,59 @@ struct ovs_tunnel_info {
FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \
opt_len))
static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
const struct iphdr *iph,
__be64 tun_id, __be16 tun_flags,
struct geneve_opt *opts,
u8 opts_len)
static inline void __ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
__be32 saddr, __be32 daddr,
u8 tos, u8 ttl,
__be16 tp_src,
__be16 tp_dst,
__be64 tun_id,
__be16 tun_flags,
struct geneve_opt *opts,
u8 opts_len)
{
tun_info->tunnel.tun_id = tun_id;
tun_info->tunnel.ipv4_src = iph->saddr;
tun_info->tunnel.ipv4_dst = iph->daddr;
tun_info->tunnel.ipv4_tos = iph->tos;
tun_info->tunnel.ipv4_ttl = iph->ttl;
tun_info->tunnel.ipv4_src = saddr;
tun_info->tunnel.ipv4_dst = daddr;
tun_info->tunnel.ipv4_tos = tos;
tun_info->tunnel.ipv4_ttl = ttl;
tun_info->tunnel.tun_flags = tun_flags;
/* clear struct padding. */
memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0,
sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
/* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
* the upper tunnel are used.
* E.g: GRE over IPSEC, the tp_src and tp_port are zero.
*/
tun_info->tunnel.tp_src = tp_src;
tun_info->tunnel.tp_dst = tp_dst;
/* Clear struct padding. */
if (sizeof(tun_info->tunnel) != OVS_TUNNEL_KEY_SIZE)
memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE,
0, sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
tun_info->options = opts;
tun_info->options_len = opts_len;
}
static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
const struct iphdr *iph,
__be16 tp_src,
__be16 tp_dst,
__be64 tun_id,
__be16 tun_flags,
struct geneve_opt *opts,
u8 opts_len)
{
__ovs_flow_tun_info_init(tun_info, iph->saddr, iph->daddr,
iph->tos, iph->ttl,
tp_src, tp_dst,
tun_id, tun_flags,
opts, opts_len);
}
#define OVS_SW_FLOW_KEY_METADATA_SIZE \
(offsetof(struct sw_flow_key, recirc_id) + \
FIELD_SIZEOF(struct sw_flow_key, recirc_id))
struct sw_flow_key {
u8 tun_opts[255];
u8 tun_opts_len;