+/*
+ * tc_qdisc.c "tc qdisc".
+ *
+ * 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * J Hadi Salim: Extension to ingress
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <math.h>
+
+#include "utils.h"
+#include "tc_util.h"
+#include "tc_common.h"
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | get ] dev STRING\n");
+ fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | parent CLASSID ]\n");
+ fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
+ fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\n");
+ fprintf(stderr, "Where:\n");
+ fprintf(stderr, "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n");
+ fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n");
+ exit(-1);
+}
+
+int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv)
+{
+ struct rtnl_handle rth;
+ struct {
+ struct nlmsghdr n;
+ struct tcmsg t;
+ char buf[4096];
+ } req;
+ struct qdisc_util *q = NULL;
+ struct tc_estimator est;
+ char d[16];
+ char k[16];
+
+ memset(&req, 0, sizeof(req));
+ memset(&est, 0, sizeof(est));
+ memset(&d, 0, sizeof(d));
+ memset(&k, 0, sizeof(k));
+
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
+ req.n.nlmsg_flags = NLM_F_REQUEST|flags;
+ req.n.nlmsg_type = cmd;
+ req.t.tcm_family = AF_UNSPEC;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (d[0])
+ duparg("dev", *argv);
+ strncpy(d, *argv, sizeof(d)-1);
+ } else if (strcmp(*argv, "handle") == 0) {
+ __u32 handle;
+ if (req.t.tcm_handle)
+ duparg("handle", *argv);
+ NEXT_ARG();
+ if (get_qdisc_handle(&handle, *argv))
+ invarg(*argv, "invalid qdisc ID");
+ req.t.tcm_handle = handle;
+ } else if (strcmp(*argv, "root") == 0) {
+ if (req.t.tcm_parent) {
+ fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
+ exit(-1);
+ }
+ req.t.tcm_parent = TC_H_ROOT;
+#ifdef TC_H_INGRESS
+ } else if (strcmp(*argv, "ingress") == 0) {
+ if (req.t.tcm_parent) {
+ fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n");
+ exit(-1);
+ }
+ req.t.tcm_parent = TC_H_INGRESS;
+ strncpy(k, "ingress", sizeof(k)-1);
+ q = get_qdisc_kind(k);
+ req.t.tcm_handle = 0xffff0000;
+
+ argc--; argv++;
+ break;
+#endif
+ } else if (strcmp(*argv, "parent") == 0) {
+ __u32 handle;
+ NEXT_ARG();
+ if (req.t.tcm_parent)
+ duparg("parent", *argv);
+ if (get_tc_classid(&handle, *argv))
+ invarg(*argv, "invalid parent ID");
+ req.t.tcm_parent = handle;
+ } else if (matches(*argv, "estimator") == 0) {
+ if (parse_estimator(&argc, &argv, &est))
+ return -1;
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ strncpy(k, *argv, sizeof(k)-1);
+
+ q = get_qdisc_kind(k);
+ argc--; argv++;
+ break;
+ }
+ argc--; argv++;
+ }
+
+ if (k[0])
+ addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
+ if (est.ewma_log)
+ addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
+
+ if (q) {
+ if (q->parse_qopt(q, argc, argv, &req.n))
+ exit(1);
+ } else {
+ if (argc) {
+ if (matches(*argv, "help") == 0)
+ usage();
+
+ fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv);
+ exit(-1);
+ }
+ }
+
+ if (rtnl_open(&rth, 0) < 0) {
+ fprintf(stderr, "Cannot open rtnetlink\n");
+ exit(1);
+ }
+
+ if (d[0]) {
+ int idx;
+
+ ll_init_map(&rth);
+
+ if ((idx = ll_name_to_index(d)) == 0) {
+ fprintf(stderr, "Cannot find device \"%s\"\n", d);
+ exit(1);
+ }
+ req.t.tcm_ifindex = idx;
+ }
+
+ if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
+ exit(2);
+
+ rtnl_close(&rth);
+ return 0;
+}
+
+void print_tcstats(FILE *fp, struct tc_stats *st)
+{
+ SPRINT_BUF(b1);
+
+ fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u) ",
+ (unsigned long long)st->bytes, st->packets, st->drops, st->overlimits);
+ if (st->bps || st->pps || st->qlen || st->backlog) {
+ fprintf(fp, "\n ");
+ if (st->bps || st->pps) {
+ fprintf(fp, "rate ");
+ if (st->bps)
+ fprintf(fp, "%s ", sprint_rate(st->bps, b1));
+ if (st->pps)
+ fprintf(fp, "%upps ", st->pps);
+ }
+ if (st->qlen || st->backlog) {
+ fprintf(fp, "backlog ");
+ if (st->backlog)
+ fprintf(fp, "%s ", sprint_size(st->backlog, b1));
+ if (st->qlen)
+ fprintf(fp, "%up ", st->qlen);
+ }
+ }
+}
+
+static int filter_ifindex;
+
+int print_qdisc(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+{
+ FILE *fp = (FILE*)arg;
+ struct tcmsg *t = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr * tb[TCA_MAX+1];
+ struct qdisc_util *q;
+ char abuf[256];
+
+ if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) {
+ fprintf(stderr, "Not a qdisc\n");
+ return 0;
+ }
+ len -= NLMSG_LENGTH(sizeof(*t));
+ if (len < 0) {
+ fprintf(stderr, "Wrong len %d\n", len);
+ return -1;
+ }
+
+ if (filter_ifindex && filter_ifindex != t->tcm_ifindex)
+ return 0;
+
+ memset(tb, 0, sizeof(tb));
+ parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
+
+ if (tb[TCA_KIND] == NULL) {
+ fprintf(stderr, "NULL kind\n");
+ return -1;
+ }
+
+ if (n->nlmsg_type == RTM_DELQDISC)
+ fprintf(fp, "deleted ");
+
+ fprintf(fp, "qdisc %s %x: ", (char*)RTA_DATA(tb[TCA_KIND]), t->tcm_handle>>16);
+ if (filter_ifindex == 0)
+ fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
+ if (t->tcm_parent == TC_H_ROOT)
+ fprintf(fp, "root ");
+ else if (t->tcm_parent) {
+ print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
+ fprintf(fp, "parent %s ", abuf);
+ }
+ if (t->tcm_info != 1) {
+ fprintf(fp, "refcnt %d ", t->tcm_info);
+ }
+ q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
+ if (tb[TCA_OPTIONS]) {
+ if (q)
+ q->print_qopt(q, fp, tb[TCA_OPTIONS]);
+ else
+ fprintf(fp, "[cannot parse qdisc parameters]");
+ }
+ fprintf(fp, "\n");
+ if (show_stats) {
+ if (tb[TCA_STATS]) {
+ if (RTA_PAYLOAD(tb[TCA_STATS]) < sizeof(struct tc_stats))
+ fprintf(fp, "statistics truncated");
+ else {
+ struct tc_stats st;
+ memcpy(&st, RTA_DATA(tb[TCA_STATS]), sizeof(st));
+ print_tcstats(fp, &st);
+ fprintf(fp, "\n");
+ }
+ }
+ if (q && tb[TCA_XSTATS]) {
+ q->print_xstats(q, fp, tb[TCA_XSTATS]);
+ fprintf(fp, "\n");
+ }
+ }
+ fflush(fp);
+ return 0;
+}
+
+
+int tc_qdisc_list(int argc, char **argv)
+{
+ struct tcmsg t;
+ struct rtnl_handle rth;
+ char d[16];
+
+ memset(&t, 0, sizeof(t));
+ t.tcm_family = AF_UNSPEC;
+ memset(&d, 0, sizeof(d));
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ strncpy(d, *argv, sizeof(d)-1);
+#ifdef TC_H_INGRESS
+ } else if (strcmp(*argv, "ingress") == 0) {
+ if (t.tcm_parent) {
+ fprintf(stderr, "Duplicate parent ID\n");
+ usage();
+ }
+ t.tcm_parent = TC_H_INGRESS;
+#endif
+ } else if (matches(*argv, "help") == 0) {
+ usage();
+ } else {
+ fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
+ return -1;
+ }
+
+ argc--; argv++;
+ }
+
+ if (rtnl_open(&rth, 0) < 0) {
+ fprintf(stderr, "Cannot open rtnetlink\n");
+ exit(1);
+ }
+
+ ll_init_map(&rth);
+
+ if (d[0]) {
+ if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
+ fprintf(stderr, "Cannot find device \"%s\"\n", d);
+ exit(1);
+ }
+ filter_ifindex = t.tcm_ifindex;
+ }
+
+ if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
+ perror("Cannot send dump request");
+ exit(1);
+ }
+
+ if (rtnl_dump_filter(&rth, print_qdisc, stdout, NULL, NULL) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ exit(1);
+ }
+
+ rtnl_close(&rth);
+ return 0;
+}
+
+int do_qdisc(int argc, char **argv)
+{
+ if (argc < 1)
+ return tc_qdisc_list(0, NULL);
+ if (matches(*argv, "add") == 0)
+ return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1);
+ if (matches(*argv, "change") == 0)
+ return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1);
+ if (matches(*argv, "replace") == 0)
+ return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1);
+ if (matches(*argv, "link") == 0)
+ return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1);
+#if 0
+ if (matches(*argv, "get") == 0)
+ return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1);
+#endif
+ if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
+ || matches(*argv, "lst") == 0)
+ return tc_qdisc_list(argc-1, argv+1);
+ if (matches(*argv, "help") == 0)
+ usage();
+ fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv);
+ return -1;
+}
projects / mirror_iproute2.git / blobdiff