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https://git.proxmox.com/git/mirror_iproute2
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927e3cfb52
This patch adapts the tc command line interface to allow bandwidth limits to be specified as a percentage of the interface's capacity. Adding this functionality requires passing the specified device string to each class/qdisc which changes the prototype for a couple of functions: the .parse_qopt and .parse_copt interfaces. The device string is a required parameter for tc-qdisc and tc-class, and when not specified, the kernel returns ENODEV. In this patch, if the user tries to specify a bandwidth percentage without naming the device, we return an error from userspace. Signed-off-by: Nishanth Devarajan<ndev2021@gmail.com>
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*
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* q_rr.c RR.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: PJ Waskiewicz, <peter.p.waskiewicz.jr@intel.com>
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* Original Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> (from PRIO)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... rr bands NUMBER priomap P1 P2... [multiqueue]\n");
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}
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static int rr_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
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{
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int pmap_mode = 0;
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int idx = 0;
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struct tc_prio_qopt opt = {3, { 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 } };
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struct rtattr *nest;
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unsigned char mq = 0;
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while (argc > 0) {
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if (strcmp(*argv, "bands") == 0) {
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if (pmap_mode)
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explain();
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NEXT_ARG();
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if (get_integer(&opt.bands, *argv, 10)) {
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fprintf(stderr, "Illegal \"bands\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "priomap") == 0) {
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if (pmap_mode) {
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fprintf(stderr, "Error: duplicate priomap\n");
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return -1;
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}
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pmap_mode = 1;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else if (strcmp(*argv, "multiqueue") == 0) {
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mq = 1;
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} else {
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unsigned int band;
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if (!pmap_mode) {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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if (get_unsigned(&band, *argv, 10)) {
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fprintf(stderr, "Illegal \"priomap\" element\n");
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return -1;
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}
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if (band > opt.bands) {
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fprintf(stderr, "\"priomap\" element is out of bands\n");
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return -1;
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}
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if (idx > TC_PRIO_MAX) {
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fprintf(stderr, "\"priomap\" index > TC_RR_MAX=%u\n", TC_PRIO_MAX);
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return -1;
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}
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opt.priomap[idx++] = band;
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}
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argc--; argv++;
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}
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nest = addattr_nest_compat(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
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if (mq)
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addattr_l(n, 1024, TCA_PRIO_MQ, NULL, 0);
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addattr_nest_compat_end(n, nest);
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return 0;
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}
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static int rr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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int i;
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struct tc_prio_qopt *qopt;
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struct rtattr *tb[TCA_PRIO_MAX + 1];
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if (opt == NULL)
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return 0;
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if (parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt,
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sizeof(*qopt)))
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return -1;
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fprintf(f, "bands %u priomap ", qopt->bands);
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for (i = 0; i <= TC_PRIO_MAX; i++)
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fprintf(f, " %d", qopt->priomap[i]);
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if (tb[TCA_PRIO_MQ])
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fprintf(f, " multiqueue: %s ",
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rta_getattr_u8(tb[TCA_PRIO_MQ]) ? "on" : "off");
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return 0;
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}
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struct qdisc_util rr_qdisc_util = {
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.id = "rr",
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.parse_qopt = rr_parse_opt,
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.print_qopt = rr_print_opt,
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};
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