1 files changed, 126 insertions, 0 deletions
diff --git a/tc/q_prio.c b/tc/q_prio.c
new file mode 100644
index 0000000..a3781ff
--- /dev/null
+++ b/tc/q_prio.c
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * q_prio.c		PRIO.
+ *
+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+	fprintf(stderr, "Usage: ... prio bands NUMBER priomap P1 P2...[multiqueue]\n");
+}
+
+static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+			  struct nlmsghdr *n, const char *dev)
+{
+	int pmap_mode = 0;
+	int idx = 0;
+	struct tc_prio_qopt opt = {3, { 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 } };
+	struct rtattr *nest;
+	unsigned char mq = 0;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "bands") == 0) {
+			if (pmap_mode)
+				explain();
+			NEXT_ARG();
+			if (get_integer(&opt.bands, *argv, 10)) {
+				fprintf(stderr, "Illegal \"bands\"\n");
+				return -1;
+			}
+		} else if (strcmp(*argv, "priomap") == 0) {
+			if (pmap_mode) {
+				fprintf(stderr, "Error: duplicate priomap\n");
+				return -1;
+			}
+			pmap_mode = 1;
+		} else if (strcmp(*argv, "multiqueue") == 0) {
+			mq = 1;
+		} else if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			unsigned int band;
+
+			if (!pmap_mode) {
+				fprintf(stderr, "What is \"%s\"?\n", *argv);
+				explain();
+				return -1;
+			}
+			if (get_unsigned(&band, *argv, 10)) {
+				fprintf(stderr, "Illegal \"priomap\" element\n");
+				return -1;
+			}
+			if (band >= opt.bands) {
+				fprintf(stderr, "\"priomap\" element is out of bands\n");
+				return -1;
+			}
+			if (idx > TC_PRIO_MAX) {
+				fprintf(stderr, "\"priomap\" index > TC_PRIO_MAX=%u\n", TC_PRIO_MAX);
+				return -1;
+			}
+			opt.priomap[idx++] = band;
+		}
+		argc--; argv++;
+	}
+
+/*
+	if (pmap_mode) {
+		for (; idx < TC_PRIO_MAX; idx++)
+			opt.priomap[idx] = opt.priomap[TC_PRIO_BESTEFFORT];
+	}
+*/
+	nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
+	if (mq)
+		addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
+	addattr_nest_compat_end(n, nest);
+	return 0;
+}
+
+int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+	int i;
+	struct tc_prio_qopt *qopt;
+	struct rtattr *tb[TCA_PRIO_MAX+1];
+
+	if (opt == NULL)
+		return 0;
+
+	if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
+					sizeof(*qopt)))
+		return -1;
+	if (qopt == NULL)
+		return -1;	/* missing data from kernel */
+
+	print_uint(PRINT_ANY, "bands", "bands %u ", qopt->bands);
+	open_json_array(PRINT_ANY, "priomap");
+	for (i = 0; i <= TC_PRIO_MAX; i++)
+		print_uint(PRINT_ANY, NULL, " %d", qopt->priomap[i]);
+	close_json_array(PRINT_ANY, "");
+
+	if (tb[TCA_PRIO_MQ])
+		print_string(PRINT_FP, NULL, " multiqueue: %s ",
+			     rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
+	print_bool(PRINT_JSON, "multiqueue", NULL,
+		   tb[TCA_PRIO_MQ] && rta_getattr_u8(tb[TCA_PRIO_MQ]));
+
+	return 0;
+}
+
+struct qdisc_util prio_qdisc_util = {
+	.id		= "prio",
+	.parse_qopt	= prio_parse_opt,
+	.print_qopt	= prio_print_opt,
+};