vici: Make per-CPU CHILD_SAs configurable

src/libcharon/plugins/vici/vici_config.c

@@ -583,6 +583,7 @@ static void log_child_data(child_data_t *data, char *name)
 	DBG2(DBG_CFG, "   proposals = %#P", data->proposals);
 	DBG2(DBG_CFG, "   local_ts = %#R", data->local_ts);
 	DBG2(DBG_CFG, "   remote_ts = %#R", data->remote_ts);
+	DBG2(DBG_CFG, "   per_cpu_sas = %u", has_opt(cfg, OPT_PER_CPU_SAS));
 	DBG2(DBG_CFG, "   hw_offload = %N", hw_offload_names, cfg->hw_offload);
 	DBG2(DBG_CFG, "   sha256_96 = %u", has_opt(cfg, OPT_SHA256_96));
 	DBG2(DBG_CFG, "   copy_df = %u", !has_opt(cfg, OPT_NO_COPY_DF));
@@ -1060,6 +1061,15 @@ CALLBACK(parse_opt_copy_ecn, bool,
 	return parse_option(out, OPT_NO_COPY_ECN, v, FALSE);
 }
 
+/**
+ * Parse OPT_PER_CPU_SAS option
+ */
+CALLBACK(parse_opt_cpus, bool,
+	child_cfg_option_t *out, chunk_t v)
+{
+	return parse_option(out, OPT_PER_CPU_SAS, v, TRUE);
+}
+
 /**
  * Parse a dscp_copy_t
  */
@@ -1934,6 +1944,7 @@ CALLBACK(child_kv, bool,
 		{ "if_id_out",			parse_if_id,		&child->cfg.if_id_out				},
 		{ "label",				parse_label,		&child->cfg.label					},
 		{ "label_mode",			parse_label_mode,	&child->cfg.label_mode				},
+		{ "per_cpu_sas",		parse_opt_cpus,		&child->cfg.options					},
 	};
 
 	return parse_rules(rules, countof(rules), name, value,

src/swanctl/swanctl.opt

@@ -1125,6 +1125,9 @@ connections.<conn>.children.<child>.replay_window = 32
 	default of 32 are supported using the Netlink backend only, a value of 0
 	disables IPsec replay protection.
 
+connections.<conn>.children.<child>.per_cpu_sas = no
+	Enable per-CPU CHILD_SAs. Requires _trap_ in **start_action**.
+
 connections.<conn>.children.<child>.hw_offload = no
 	Enable hardware offload for this CHILD_SA, if supported by the IPsec
 	implementation.