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c865c52365
sch_plug can be used to perform functional qdisc unit tests controlling explicitly the queuing behaviour from user-space. Plug support lacks since its introduction in 2012. This change introduces basic support, to control the tc status. v1 -> v2: - use the SPDX identifier Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David Ahern <dsahern@gmail.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* q_log.c plug scheduler
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*
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* Copyright (C) 2019 Paolo Abeni <pabeni@redhat.com>
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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: ... plug [block | release | release_indefinite | limit NUMBER]\n");
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}
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static int plug_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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struct nlmsghdr *n, const char *dev)
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{
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struct tc_plug_qopt opt = {};
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int ok = 0;
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while (argc > 0) {
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if (strcmp(*argv, "block") == 0) {
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opt.action = TCQ_PLUG_BUFFER;
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ok++;
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} else if (strcmp(*argv, "release") == 0) {
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opt.action = TCQ_PLUG_RELEASE_ONE;
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ok++;
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} else if (strcmp(*argv, "release_indefinite") == 0) {
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opt.action = TCQ_PLUG_RELEASE_INDEFINITE;
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ok++;
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} else if (strcmp(*argv, "limit") == 0) {
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opt.action = TCQ_PLUG_LIMIT;
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NEXT_ARG();
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if (get_size(&opt.limit, *argv)) {
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fprintf(stderr, "Illegal value for \"limit\": \"%s\"\n", *argv);
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return -1;
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}
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ok++;
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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 {
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fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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if (ok)
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addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
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return 0;
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}
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static int plug_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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/* dummy implementation as sch_plug does not implement a dump op */
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return 0;
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}
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struct qdisc_util plug_qdisc_util = {
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.id = "plug",
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.parse_qopt = plug_parse_opt,
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.print_qopt = plug_print_opt,
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};
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