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-rw-r--r--tc/q_prio.c126
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,
+};