+static void
+parse_metadata(struct ofpbuf *b, char *arg)
+{
+ struct ofpact_metadata *om;
+ char *mask = strchr(arg, '/');
+
+ om = ofpact_put_WRITE_METADATA(b);
+
+ if (mask) {
+ *mask = '\0';
+ om->mask = htonll(str_to_u64(mask + 1));
+ } else {
+ om->mask = htonll(UINT64_MAX);
+ }
+
+ om->metadata = htonll(str_to_u64(arg));
+}
+
+static void
+parse_sample(struct ofpbuf *b, char *arg)
+{
+ struct ofpact_sample *os = ofpact_put_SAMPLE(b);
+ char *key, *value;
+
+ while (ofputil_parse_key_value(&arg, &key, &value)) {
+ if (!strcmp(key, "probability")) {
+ os->probability = str_to_u16(value, "probability");
+ if (os->probability == 0) {
+ ovs_fatal(0, "invalid probability value \"%s\"", value);
+ }
+ } else if (!strcmp(key, "collector_set_id")) {
+ os->collector_set_id = str_to_u32(value);
+ } else if (!strcmp(key, "obs_domain_id")) {
+ os->obs_domain_id = str_to_u32(value);
+ } else if (!strcmp(key, "obs_point_id")) {
+ os->obs_point_id = str_to_u32(value);
+ } else {
+ ovs_fatal(0, "invalid key \"%s\" in \"sample\" argument",
+ key);
+ }
+ }
+ if (os->probability == 0) {
+ ovs_fatal(0, "non-zero \"probability\" must be specified on sample");
+ }
+}
+