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5bec34845b
User runs "tc monitor" (without quotes) and watches events of addition, deletion and updates from qdiscs, classes, filters and actions as they happen. Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
323 lines
8.0 KiB
C
323 lines
8.0 KiB
C
/*
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* tc_class.c "tc class".
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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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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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 <syslog.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 <math.h>
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#include "utils.h"
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#include "tc_util.h"
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#include "tc_common.h"
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static void usage(void);
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static void usage(void)
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{
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fprintf(stderr, "Usage: tc class [ add | del | change | replace ] dev STRING\n");
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fprintf(stderr, " [ classid CLASSID ] [ root | parent CLASSID ]\n");
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fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n");
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fprintf(stderr, "\n");
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fprintf(stderr, " tc class show [ dev STRING ] [ root | parent CLASSID ]\n");
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fprintf(stderr, "Where:\n");
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fprintf(stderr, "QDISC_KIND := { prio | cbq | etc. }\n");
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fprintf(stderr, "OPTIONS := ... try tc class add <desired QDISC_KIND> help\n");
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return;
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}
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int tc_class_modify(int cmd, unsigned flags, int argc, char **argv)
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{
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struct {
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struct nlmsghdr n;
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struct tcmsg t;
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char buf[4096];
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} req;
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struct qdisc_util *q = NULL;
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struct tc_estimator est;
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char d[16];
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char k[16];
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memset(&req, 0, sizeof(req));
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memset(&est, 0, sizeof(est));
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memset(d, 0, sizeof(d));
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memset(k, 0, sizeof(k));
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req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
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req.n.nlmsg_flags = NLM_F_REQUEST|flags;
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req.n.nlmsg_type = cmd;
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req.t.tcm_family = AF_UNSPEC;
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while (argc > 0) {
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if (strcmp(*argv, "dev") == 0) {
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NEXT_ARG();
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if (d[0])
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duparg("dev", *argv);
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strncpy(d, *argv, sizeof(d)-1);
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} else if (strcmp(*argv, "classid") == 0) {
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__u32 handle;
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NEXT_ARG();
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if (req.t.tcm_handle)
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duparg("classid", *argv);
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if (get_tc_classid(&handle, *argv))
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invarg(*argv, "invalid class ID");
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req.t.tcm_handle = handle;
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} else if (strcmp(*argv, "handle") == 0) {
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fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n");
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return -1;
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} else if (strcmp(*argv, "root") == 0) {
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if (req.t.tcm_parent) {
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fprintf(stderr, "Error: \"root\" is duplicate parent ID.\n");
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return -1;
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}
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req.t.tcm_parent = TC_H_ROOT;
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} else if (strcmp(*argv, "parent") == 0) {
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__u32 handle;
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NEXT_ARG();
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if (req.t.tcm_parent)
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duparg("parent", *argv);
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if (get_tc_classid(&handle, *argv))
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invarg(*argv, "invalid parent ID");
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req.t.tcm_parent = handle;
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} else if (matches(*argv, "estimator") == 0) {
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if (parse_estimator(&argc, &argv, &est))
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return -1;
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} else if (matches(*argv, "help") == 0) {
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usage();
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} else {
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strncpy(k, *argv, sizeof(k)-1);
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q = get_qdisc_kind(k);
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argc--; argv++;
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break;
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}
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argc--; argv++;
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}
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if (k[0])
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addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
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if (est.ewma_log)
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addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
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if (q) {
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if (q->parse_copt == NULL) {
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fprintf(stderr, "Error: Qdisc \"%s\" is classless.\n", k);
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return 1;
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}
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if (q->parse_copt(q, argc, argv, &req.n))
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return 1;
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} else {
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if (argc) {
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if (matches(*argv, "help") == 0)
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usage();
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fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv);
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return -1;
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}
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}
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if (d[0]) {
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ll_init_map(&rth);
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if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) {
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fprintf(stderr, "Cannot find device \"%s\"\n", d);
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return 1;
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}
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}
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if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
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return 2;
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return 0;
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}
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int filter_ifindex;
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__u32 filter_qdisc;
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int print_class(const struct sockaddr_nl *who,
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struct nlmsghdr *n, void *arg)
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{
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FILE *fp = (FILE*)arg;
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struct tcmsg *t = NLMSG_DATA(n);
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int len = n->nlmsg_len;
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struct rtattr * tb[TCA_MAX+1];
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struct qdisc_util *q;
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char abuf[256];
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if (n->nlmsg_type != RTM_NEWTCLASS && n->nlmsg_type != RTM_DELTCLASS) {
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fprintf(stderr, "Not a class\n");
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return 0;
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}
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len -= NLMSG_LENGTH(sizeof(*t));
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if (len < 0) {
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fprintf(stderr, "Wrong len %d\n", len);
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return -1;
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}
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if (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc))
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return 0;
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memset(tb, 0, sizeof(tb));
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parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
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if (tb[TCA_KIND] == NULL) {
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fprintf(stderr, "print_class: NULL kind\n");
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return -1;
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}
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if (n->nlmsg_type == RTM_DELTCLASS)
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fprintf(fp, "deleted ");
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abuf[0] = 0;
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if (t->tcm_handle) {
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if (filter_qdisc)
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print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_handle));
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else
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print_tc_classid(abuf, sizeof(abuf), t->tcm_handle);
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}
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fprintf(fp, "class %s %s ", (char*)RTA_DATA(tb[TCA_KIND]), abuf);
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if (filter_ifindex == 0)
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fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
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if (t->tcm_parent == TC_H_ROOT)
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fprintf(fp, "root ");
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else {
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if (filter_qdisc)
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print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_parent));
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else
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print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
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fprintf(fp, "parent %s ", abuf);
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}
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if (t->tcm_info)
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fprintf(fp, "leaf %x: ", t->tcm_info>>16);
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q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
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if (tb[TCA_OPTIONS]) {
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if (q && q->print_copt)
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q->print_copt(q, fp, tb[TCA_OPTIONS]);
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else
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fprintf(fp, "[cannot parse class parameters]");
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}
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fprintf(fp, "\n");
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if (show_stats) {
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struct rtattr *xstats = NULL;
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if (tb[TCA_STATS] || tb[TCA_STATS2]) {
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print_tcstats_attr(fp, tb, " ", &xstats);
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fprintf(fp, "\n");
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}
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if (q && (xstats || tb[TCA_XSTATS]) && q->print_xstats) {
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q->print_xstats(q, fp, xstats ? : tb[TCA_XSTATS]);
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fprintf(fp, "\n");
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}
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}
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fflush(fp);
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return 0;
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}
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int tc_class_list(int argc, char **argv)
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{
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struct tcmsg t;
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char d[16];
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memset(&t, 0, sizeof(t));
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t.tcm_family = AF_UNSPEC;
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memset(d, 0, sizeof(d));
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while (argc > 0) {
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if (strcmp(*argv, "dev") == 0) {
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NEXT_ARG();
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if (d[0])
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duparg("dev", *argv);
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strncpy(d, *argv, sizeof(d)-1);
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} else if (strcmp(*argv, "qdisc") == 0) {
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NEXT_ARG();
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if (filter_qdisc)
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duparg("qdisc", *argv);
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if (get_qdisc_handle(&filter_qdisc, *argv))
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invarg(*argv, "invalid qdisc ID");
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} else if (strcmp(*argv, "root") == 0) {
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if (t.tcm_parent) {
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fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
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return -1;
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}
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t.tcm_parent = TC_H_ROOT;
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} else if (strcmp(*argv, "parent") == 0) {
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__u32 handle;
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if (t.tcm_parent)
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duparg("parent", *argv);
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NEXT_ARG();
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if (get_tc_classid(&handle, *argv))
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invarg(*argv, "invalid parent ID");
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t.tcm_parent = handle;
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} else if (matches(*argv, "help") == 0) {
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usage();
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} else {
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fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv);
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return -1;
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}
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argc--; argv++;
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}
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ll_init_map(&rth);
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if (d[0]) {
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if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
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fprintf(stderr, "Cannot find device \"%s\"\n", d);
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return 1;
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}
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filter_ifindex = t.tcm_ifindex;
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}
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if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) {
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perror("Cannot send dump request");
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return 1;
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}
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if (rtnl_dump_filter(&rth, print_class, stdout, NULL, NULL) < 0) {
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fprintf(stderr, "Dump terminated\n");
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return 1;
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}
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return 0;
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}
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int do_class(int argc, char **argv)
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{
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if (argc < 1)
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return tc_class_list(0, NULL);
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if (matches(*argv, "add") == 0)
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return tc_class_modify(RTM_NEWTCLASS, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1);
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if (matches(*argv, "change") == 0)
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return tc_class_modify(RTM_NEWTCLASS, 0, argc-1, argv+1);
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if (matches(*argv, "replace") == 0)
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return tc_class_modify(RTM_NEWTCLASS, NLM_F_CREATE, argc-1, argv+1);
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if (matches(*argv, "delete") == 0)
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return tc_class_modify(RTM_DELTCLASS, 0, argc-1, argv+1);
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#if 0
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if (matches(*argv, "get") == 0)
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return tc_class_get(RTM_GETTCLASS, 0, argc-1, argv+1);
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#endif
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if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
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|| matches(*argv, "lst") == 0)
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return tc_class_list(argc-1, argv+1);
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if (matches(*argv, "help") == 0)
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usage();
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fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv);
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return -1;
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}
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