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-rw-r--r--dcb/dcb_maxrate.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/dcb/dcb_maxrate.c b/dcb/dcb_maxrate.c
new file mode 100644
index 0000000..1538c6d
--- /dev/null
+++ b/dcb/dcb_maxrate.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <linux/dcbnl.h>
+
+#include "dcb.h"
+#include "utils.h"
+
+static void dcb_maxrate_help_set(void)
+{
+ fprintf(stderr,
+ "Usage: dcb maxrate set dev STRING\n"
+ " [ tc-maxrate RATE-MAP ]\n"
+ "\n"
+ " where RATE-MAP := [ RATE-MAP ] RATE-MAPPING\n"
+ " RATE-MAPPING := { all | TC }:RATE\n"
+ " TC := { 0 .. 7 }\n"
+ "\n"
+ );
+}
+
+static void dcb_maxrate_help_show(void)
+{
+ fprintf(stderr,
+ "Usage: dcb [ -i ] maxrate show dev STRING\n"
+ " [ tc-maxrate ]\n"
+ "\n"
+ );
+}
+
+static void dcb_maxrate_help(void)
+{
+ fprintf(stderr,
+ "Usage: dcb maxrate help\n"
+ "\n"
+ );
+ dcb_maxrate_help_show();
+ dcb_maxrate_help_set();
+}
+
+static int dcb_maxrate_parse_mapping_tc_maxrate(__u32 key, char *value, void *data)
+{
+ __u64 rate;
+
+ if (get_rate64(&rate, value))
+ return -EINVAL;
+
+ return dcb_parse_mapping("TC", key, IEEE_8021QAZ_MAX_TCS - 1,
+ "RATE", rate, -1,
+ dcb_set_u64, data);
+}
+
+static void dcb_maxrate_print_tc_maxrate(struct dcb *dcb, const struct ieee_maxrate *maxrate)
+{
+ size_t size = ARRAY_SIZE(maxrate->tc_maxrate);
+ SPRINT_BUF(b);
+ size_t i;
+
+ open_json_array(PRINT_JSON, "tc_maxrate");
+ print_string(PRINT_FP, NULL, "tc-maxrate ", NULL);
+
+ for (i = 0; i < size; i++) {
+ snprintf(b, sizeof(b), "%zd:%%s ", i);
+ print_rate(dcb->use_iec, PRINT_ANY, NULL, b, maxrate->tc_maxrate[i]);
+ }
+
+ close_json_array(PRINT_JSON, "tc_maxrate");
+}
+
+static void dcb_maxrate_print(struct dcb *dcb, const struct ieee_maxrate *maxrate)
+{
+ dcb_maxrate_print_tc_maxrate(dcb, maxrate);
+ print_nl();
+}
+
+static int dcb_maxrate_get(struct dcb *dcb, const char *dev, struct ieee_maxrate *maxrate)
+{
+ return dcb_get_attribute(dcb, dev, DCB_ATTR_IEEE_MAXRATE, maxrate, sizeof(*maxrate));
+}
+
+static int dcb_maxrate_set(struct dcb *dcb, const char *dev, const struct ieee_maxrate *maxrate)
+{
+ return dcb_set_attribute(dcb, dev, DCB_ATTR_IEEE_MAXRATE, maxrate, sizeof(*maxrate));
+}
+
+static int dcb_cmd_maxrate_set(struct dcb *dcb, const char *dev, int argc, char **argv)
+{
+ struct ieee_maxrate maxrate;
+ int ret;
+
+ if (!argc) {
+ dcb_maxrate_help_set();
+ return 0;
+ }
+
+ ret = dcb_maxrate_get(dcb, dev, &maxrate);
+ if (ret)
+ return ret;
+
+ do {
+ if (matches(*argv, "help") == 0) {
+ dcb_maxrate_help_set();
+ return 0;
+ } else if (matches(*argv, "tc-maxrate") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true,
+ &dcb_maxrate_parse_mapping_tc_maxrate, &maxrate);
+ if (ret) {
+ fprintf(stderr, "Invalid mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_maxrate_help_set();
+ return -EINVAL;
+ }
+
+ NEXT_ARG_FWD();
+ } while (argc > 0);
+
+ return dcb_maxrate_set(dcb, dev, &maxrate);
+}
+
+static int dcb_cmd_maxrate_show(struct dcb *dcb, const char *dev, int argc, char **argv)
+{
+ struct ieee_maxrate maxrate;
+ int ret;
+
+ ret = dcb_maxrate_get(dcb, dev, &maxrate);
+ if (ret)
+ return ret;
+
+ open_json_object(NULL);
+
+ if (!argc) {
+ dcb_maxrate_print(dcb, &maxrate);
+ goto out;
+ }
+
+ do {
+ if (matches(*argv, "help") == 0) {
+ dcb_maxrate_help_show();
+ return 0;
+ } else if (matches(*argv, "tc-maxrate") == 0) {
+ dcb_maxrate_print_tc_maxrate(dcb, &maxrate);
+ print_nl();
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_maxrate_help_show();
+ return -EINVAL;
+ }
+
+ NEXT_ARG_FWD();
+ } while (argc > 0);
+
+out:
+ close_json_object();
+ return 0;
+}
+
+int dcb_cmd_maxrate(struct dcb *dcb, int argc, char **argv)
+{
+ if (!argc || matches(*argv, "help") == 0) {
+ dcb_maxrate_help();
+ return 0;
+ } else if (matches(*argv, "show") == 0) {
+ NEXT_ARG_FWD();
+ return dcb_cmd_parse_dev(dcb, argc, argv,
+ dcb_cmd_maxrate_show, dcb_maxrate_help_show);
+ } else if (matches(*argv, "set") == 0) {
+ NEXT_ARG_FWD();
+ return dcb_cmd_parse_dev(dcb, argc, argv,
+ dcb_cmd_maxrate_set, dcb_maxrate_help_set);
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_maxrate_help();
+ return -EINVAL;
+ }
+}