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/*
* q_cbs.c CBS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Vinicius Costa Gomes <vinicius.gomes@intel.com>
*
*/
#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: ... cbs hicredit BYTES locredit BYTES sendslope BPS idleslope BPS\n");
fprintf(stderr, " [offload 0|1]\n");
}
static void explain1(const char *arg, const char *val)
{
fprintf(stderr, "cbs: illegal value for \"%s\": \"%s\"\n", arg, val);
}
static int cbs_parse_opt(struct qdisc_util *qu, int argc,
char **argv, struct nlmsghdr *n, const char *dev)
{
struct tc_cbs_qopt opt = {};
struct rtattr *tail;
while (argc > 0) {
if (matches(*argv, "offload") == 0) {
NEXT_ARG();
if (opt.offload) {
fprintf(stderr, "cbs: duplicate \"offload\" specification\n");
return -1;
}
if (get_u8(&opt.offload, *argv, 0)) {
explain1("offload", *argv);
return -1;
}
} else if (matches(*argv, "hicredit") == 0) {
NEXT_ARG();
if (opt.hicredit) {
fprintf(stderr, "cbs: duplicate \"hicredit\" specification\n");
return -1;
}
if (get_s32(&opt.hicredit, *argv, 0)) {
explain1("hicredit", *argv);
return -1;
}
} else if (matches(*argv, "locredit") == 0) {
NEXT_ARG();
if (opt.locredit) {
fprintf(stderr, "cbs: duplicate \"locredit\" specification\n");
return -1;
}
if (get_s32(&opt.locredit, *argv, 0)) {
explain1("locredit", *argv);
return -1;
}
} else if (matches(*argv, "sendslope") == 0) {
NEXT_ARG();
if (opt.sendslope) {
fprintf(stderr, "cbs: duplicate \"sendslope\" specification\n");
return -1;
}
if (get_s32(&opt.sendslope, *argv, 0)) {
explain1("sendslope", *argv);
return -1;
}
} else if (matches(*argv, "idleslope") == 0) {
NEXT_ARG();
if (opt.idleslope) {
fprintf(stderr, "cbs: duplicate \"idleslope\" specification\n");
return -1;
}
if (get_s32(&opt.idleslope, *argv, 0)) {
explain1("idleslope", *argv);
return -1;
}
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "cbs: unknown parameter \"%s\"\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
tail = NLMSG_TAIL(n);
addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
addattr_l(n, 2024, TCA_CBS_PARMS, &opt, sizeof(opt));
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
static int cbs_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_CBS_MAX+1];
struct tc_cbs_qopt *qopt;
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_CBS_MAX, opt);
if (tb[TCA_CBS_PARMS] == NULL)
return -1;
qopt = RTA_DATA(tb[TCA_CBS_PARMS]);
if (RTA_PAYLOAD(tb[TCA_CBS_PARMS]) < sizeof(*qopt))
return -1;
fprintf(f, "hicredit %d ", qopt->hicredit);
fprintf(f, "locredit %d ", qopt->locredit);
fprintf(f, "sendslope %d ", qopt->sendslope);
fprintf(f, "idleslope %d ", qopt->idleslope);
fprintf(f, "offload %d ", qopt->offload);
return 0;
}
struct qdisc_util cbs_qdisc_util = {
.id = "cbs",
.parse_qopt = cbs_parse_opt,
.print_qopt = cbs_print_opt,
};
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