VLOG_DEFINE_THIS_MODULE(tunnel);
+/* skb mark used for IPsec tunnel packets */
+#define IPSEC_MARK 1
+
struct tnl_match {
ovs_be64 in_key;
ovs_be32 ip_src;
ovs_be32 ip_dst;
odp_port_t odp_port;
- uint32_t skb_mark;
+ uint32_t pkt_mark;
bool in_key_flow;
bool ip_src_flow;
bool ip_dst_flow;
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
static struct vlog_rate_limit dbg_rl = VLOG_RATE_LIMIT_INIT(60, 60);
-static struct tnl_port *tnl_find(struct tnl_match *) OVS_REQ_RDLOCK(rwlock);
+static struct tnl_port *tnl_find(const struct flow *) OVS_REQ_RDLOCK(rwlock);
static struct tnl_port *tnl_find_exact(struct tnl_match *)
OVS_REQ_RDLOCK(rwlock);
static struct tnl_port *tnl_find_ofport(const struct ofport_dpif *)
tnl_port->match.ip_dst = cfg->ip_dst;
tnl_port->match.ip_src_flow = cfg->ip_src_flow;
tnl_port->match.ip_dst_flow = cfg->ip_dst_flow;
- tnl_port->match.skb_mark = cfg->ipsec ? IPSEC_MARK : 0;
+ tnl_port->match.pkt_mark = cfg->ipsec ? IPSEC_MARK : 0;
tnl_port->match.in_key_flow = cfg->in_key_flow;
tnl_port->match.odp_port = odp_port;
char *pre_flow_str = NULL;
const struct ofport_dpif *ofport;
struct tnl_port *tnl_port;
- struct tnl_match match;
-
- memset(&match, 0, sizeof match);
- match.odp_port = flow->in_port.odp_port;
- match.ip_src = flow->tunnel.ip_dst;
- match.ip_dst = flow->tunnel.ip_src;
- match.in_key = flow->tunnel.tun_id;
- match.skb_mark = flow->skb_mark;
ovs_rwlock_rdlock(&rwlock);
- tnl_port = tnl_find(&match);
+ tnl_port = tnl_find(flow);
ofport = tnl_port ? tnl_port->ofport : NULL;
if (!tnl_port) {
- struct ds ds = DS_EMPTY_INITIALIZER;
+ char *flow_str = flow_to_string(flow);
- tnl_match_fmt(&match, &ds);
- VLOG_WARN_RL(&rl, "receive tunnel port not found (%s)", ds_cstr(&ds));
- ds_destroy(&ds);
+ VLOG_WARN_RL(&rl, "receive tunnel port not found (%s)", flow_str);
+ free(flow_str);
goto out;
}
return ofport;
}
+static bool
+tnl_ecn_ok(const struct flow *base_flow, struct flow *flow)
+{
+ if (is_ip_any(base_flow)
+ && (flow->tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) {
+ if ((base_flow->nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) {
+ VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE"
+ " but is not ECN capable");
+ return false;
+ } else {
+ /* Set the ECN CE value in the tunneled packet. */
+ flow->nw_tos |= IP_ECN_CE;
+ }
+ }
+
+ return true;
+}
+
+/* Should be called at the beginning of action translation to initialize
+ * wildcards and perform any actions based on receiving on tunnel port.
+ *
+ * Returns false if the packet must be dropped. */
+bool
+tnl_xlate_init(const struct flow *base_flow, struct flow *flow,
+ struct flow_wildcards *wc)
+{
+ if (tnl_port_should_receive(flow)) {
+ memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel);
+ memset(&wc->masks.pkt_mark, 0xff, sizeof wc->masks.pkt_mark);
+
+ if (!tnl_ecn_ok(base_flow, flow)) {
+ return false;
+ }
+
+ flow->pkt_mark &= ~IPSEC_MARK;
+ }
+
+ return true;
+}
+
/* Given that 'flow' should be output to the ofport corresponding to
* 'tnl_port', updates 'flow''s tunnel headers and returns the actual datapath
* port that the output should happen on. May return ODPP_NONE if the output
if (!cfg->ip_dst_flow) {
flow->tunnel.ip_dst = tnl_port->match.ip_dst;
}
- flow->skb_mark = tnl_port->match.skb_mark;
+ flow->pkt_mark = tnl_port->match.pkt_mark;
if (!cfg->out_key_flow) {
flow->tunnel.tun_id = cfg->out_key;
return NULL;
}
+/* Returns the tnl_port that is the best match for the tunnel data in 'flow',
+ * or NULL if no tnl_port matches 'flow'. */
static struct tnl_port *
-tnl_find(struct tnl_match *match_) OVS_REQ_RDLOCK(rwlock)
+tnl_find(const struct flow *flow) OVS_REQ_RDLOCK(rwlock)
{
- struct tnl_match match = *match_;
- struct tnl_port *tnl_port;
+ enum ip_src_type {
+ IP_SRC_CFG, /* ip_src must equal configured address. */
+ IP_SRC_ANY, /* Any ip_src is acceptable. */
+ IP_SRC_FLOW /* ip_src is handled in flow table. */
+ };
+
+ struct tnl_match_pattern {
+ bool in_key_flow;
+ bool ip_dst_flow;
+ enum ip_src_type ip_src;
+ };
+
+ static const struct tnl_match_pattern patterns[] = {
+ { false, false, IP_SRC_CFG }, /* remote_ip, local_ip, in_key. */
+ { false, false, IP_SRC_ANY }, /* remote_ip, in_key. */
+ { true, false, IP_SRC_CFG }, /* remote_ip, local_ip. */
+ { true, false, IP_SRC_ANY }, /* remote_ip. */
+ { true, true, IP_SRC_ANY }, /* Flow-based remote. */
+ { true, true, IP_SRC_FLOW }, /* Flow-based everything. */
+ };
+
+ const struct tnl_match_pattern *p;
+ struct tnl_match match;
- /* remote_ip, local_ip, in_key */
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
- }
+ memset(&match, 0, sizeof match);
+ match.odp_port = flow->in_port.odp_port;
+ match.pkt_mark = flow->pkt_mark;
- /* remote_ip, in_key */
- match.ip_src = 0;
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
- }
- match.ip_src = match_->ip_src;
+ for (p = patterns; p < &patterns[ARRAY_SIZE(patterns)]; p++) {
+ struct tnl_port *tnl_port;
- /* remote_ip, local_ip */
- match.in_key = 0;
- match.in_key_flow = true;
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
- }
+ match.in_key_flow = p->in_key_flow;
+ match.in_key = p->in_key_flow ? 0 : flow->tunnel.tun_id;
- /* remote_ip */
- match.ip_src = 0;
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
- }
+ match.ip_dst_flow = p->ip_dst_flow;
+ match.ip_dst = p->ip_dst_flow ? 0 : flow->tunnel.ip_src;
- /* Flow-based remote */
- match.ip_dst = 0;
- match.ip_dst_flow = true;
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
- }
+ match.ip_src_flow = p->ip_src == IP_SRC_FLOW;
+ match.ip_src = p->ip_src == IP_SRC_CFG ? flow->tunnel.ip_dst : 0;
- /* Flow-based everything */
- match.ip_src = 0;
- match.ip_src_flow = true;
- tnl_port = tnl_find_exact(&match);
- if (tnl_port) {
- return tnl_port;
+ tnl_port = tnl_find_exact(&match);
+ if (tnl_port) {
+ return tnl_port;
+ }
}
return NULL;
}
ds_put_format(ds, ", dp port=%"PRIu32, match->odp_port);
- ds_put_format(ds, ", skb mark=%"PRIu32, match->skb_mark);
+ ds_put_format(ds, ", pkt mark=%"PRIu32, match->pkt_mark);
}
static void