[mirror_iproute2.git] / tc / tc_qdisc.c

/*
 * 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;
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* tc_qdisc.c "tc qdisc".
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	* J Hadi Salim: Extension to ingress
	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <sys/socket.h>
	19	#include <netinet/in.h>
	20	#include <arpa/inet.h>
	21	#include <string.h>
	22	#include <math.h>
	23
	24	#include "utils.h"
	25	#include "tc_util.h"
	26	#include "tc_common.h"
	27
	28	static void usage(void) __attribute__((noreturn));
	29
	30	static void usage(void)
	31	{
	32	fprintf(stderr, "Usage: tc qdisc [ add \| del \| replace \| change \| get ] dev STRING\n");
	33	fprintf(stderr, " [ handle QHANDLE ] [ root \| ingress \| parent CLASSID ]\n");
	34	fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
	35	fprintf(stderr, " [ [ QDISC_KIND ] [ help \| OPTIONS ] ]\n");
	36	fprintf(stderr, "\n");
	37	fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\n");
	38	fprintf(stderr, "Where:\n");
	39	fprintf(stderr, "QDISC_KIND := { [p\|b]fifo \| tbf \| prio \| cbq \| red \| etc. }\n");
	40	fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n");
	41	exit(-1);
	42	}
	43
	44	int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv)
	45	{
	46	struct rtnl_handle rth;
	47	struct {
	48	struct nlmsghdr n;
	49	struct tcmsg t;
	50	char buf[4096];
	51	} req;
	52	struct qdisc_util *q = NULL;
	53	struct tc_estimator est;
	54	char d[16];
	55	char k[16];
	56
	57	memset(&req, 0, sizeof(req));
	58	memset(&est, 0, sizeof(est));
	59	memset(&d, 0, sizeof(d));
	60	memset(&k, 0, sizeof(k));
	61
	62	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
	63	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	64	req.n.nlmsg_type = cmd;
65	req.t.tcm_family = AF_UNSPEC;
66
67	while (argc > 0) {
68	if (strcmp(*argv, "dev") == 0) {
69	NEXT_ARG();
70	if (d[0])
71	duparg("dev", *argv);
72	strncpy(d, *argv, sizeof(d)-1);
73	} else if (strcmp(*argv, "handle") == 0) {
74	__u32 handle;
75	if (req.t.tcm_handle)
76	duparg("handle", *argv);
77	NEXT_ARG();
78	if (get_qdisc_handle(&handle, *argv))
79	invarg(*argv, "invalid qdisc ID");
80	req.t.tcm_handle = handle;
81	} else if (strcmp(*argv, "root") == 0) {
82	if (req.t.tcm_parent) {
83	fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
84	exit(-1);
85	}
86	req.t.tcm_parent = TC_H_ROOT;
87	#ifdef TC_H_INGRESS
88	} else if (strcmp(*argv, "ingress") == 0) {
89	if (req.t.tcm_parent) {
90	fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n");
91	exit(-1);
92	}
93	req.t.tcm_parent = TC_H_INGRESS;
94	strncpy(k, "ingress", sizeof(k)-1);
95	q = get_qdisc_kind(k);
96	req.t.tcm_handle = 0xffff0000;
97
98	argc--; argv++;
99	break;
100	#endif
101	} else if (strcmp(*argv, "parent") == 0) {
102	__u32 handle;
103	NEXT_ARG();
104	if (req.t.tcm_parent)
105	duparg("parent", *argv);
106	if (get_tc_classid(&handle, *argv))
107	invarg(*argv, "invalid parent ID");
108	req.t.tcm_parent = handle;
109	} else if (matches(*argv, "estimator") == 0) {
110	if (parse_estimator(&argc, &argv, &est))
111	return -1;
112	} else if (matches(*argv, "help") == 0) {
113	usage();
114	} else {
115	strncpy(k, *argv, sizeof(k)-1);
116
117	q = get_qdisc_kind(k);
118	argc--; argv++;
119	break;
120	}
121	argc--; argv++;
122	}
123
124	if (k[0])
125	addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
126	if (est.ewma_log)
127	addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
128
129	if (q) {
130	if (q->parse_qopt(q, argc, argv, &req.n))
131	exit(1);
132	} else {
133	if (argc) {
134	if (matches(*argv, "help") == 0)
135	usage();
136
137	fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv);
138	exit(-1);
139	}
140	}
141
142	if (rtnl_open(&rth, 0) < 0) {
143	fprintf(stderr, "Cannot open rtnetlink\n");
144	exit(1);
145	}
146
147	if (d[0]) {
148	int idx;
149
150	ll_init_map(&rth);
151
152	if ((idx = ll_name_to_index(d)) == 0) {
153	fprintf(stderr, "Cannot find device \"%s\"\n", d);
154	exit(1);
155	}
156	req.t.tcm_ifindex = idx;
157	}
158
159	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
160	exit(2);
161
162	rtnl_close(&rth);
163	return 0;
164	}
165
166	void print_tcstats(FILE fp, struct tc_stats st)
167	{
168	SPRINT_BUF(b1);
169
170	fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u) ",
171	(unsigned long long)st->bytes, st->packets, st->drops, st->overlimits);
172	if (st->bps \|\| st->pps \|\| st->qlen \|\| st->backlog) {
173	fprintf(fp, "\n ");
174	if (st->bps \|\| st->pps) {
175	fprintf(fp, "rate ");
176	if (st->bps)
177	fprintf(fp, "%s ", sprint_rate(st->bps, b1));
178	if (st->pps)
179	fprintf(fp, "%upps ", st->pps);
180	}
181	if (st->qlen \|\| st->backlog) {
182	fprintf(fp, "backlog ");
183	if (st->backlog)
184	fprintf(fp, "%s ", sprint_size(st->backlog, b1));
185	if (st->qlen)
186	fprintf(fp, "%up ", st->qlen);
187	}
188	}
189	}
190
191	static int filter_ifindex;
192
193	int print_qdisc(struct sockaddr_nl who, struct nlmsghdr n, void *arg)
194	{
195	FILE fp = (FILE)arg;
196	struct tcmsg *t = NLMSG_DATA(n);
197	int len = n->nlmsg_len;
198	struct rtattr * tb[TCA_MAX+1];
199	struct qdisc_util *q;
200	char abuf[256];
201
202	if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) {
203	fprintf(stderr, "Not a qdisc\n");
204	return 0;
205	}
206	len -= NLMSG_LENGTH(sizeof(*t));
207	if (len < 0) {
208	fprintf(stderr, "Wrong len %d\n", len);
209	return -1;
210	}
211
212	if (filter_ifindex && filter_ifindex != t->tcm_ifindex)
213	return 0;
214
215	memset(tb, 0, sizeof(tb));
216	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
217
218	if (tb[TCA_KIND] == NULL) {
219	fprintf(stderr, "NULL kind\n");
220	return -1;
221	}
222
223	if (n->nlmsg_type == RTM_DELQDISC)
224	fprintf(fp, "deleted ");
225
226	fprintf(fp, "qdisc %s %x: ", (char*)RTA_DATA(tb[TCA_KIND]), t->tcm_handle>>16);
227	if (filter_ifindex == 0)
228	fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
229	if (t->tcm_parent == TC_H_ROOT)
230	fprintf(fp, "root ");
231	else if (t->tcm_parent) {
232	print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
233	fprintf(fp, "parent %s ", abuf);
234	}
235	if (t->tcm_info != 1) {
236	fprintf(fp, "refcnt %d ", t->tcm_info);
237	}
238	q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
239	if (tb[TCA_OPTIONS]) {
240	if (q)
241	q->print_qopt(q, fp, tb[TCA_OPTIONS]);
242	else
243	fprintf(fp, "[cannot parse qdisc parameters]");
244	}
245	fprintf(fp, "\n");
246	if (show_stats) {
247	if (tb[TCA_STATS]) {
248	if (RTA_PAYLOAD(tb[TCA_STATS]) < sizeof(struct tc_stats))
249	fprintf(fp, "statistics truncated");
250	else {
251	struct tc_stats st;
252	memcpy(&st, RTA_DATA(tb[TCA_STATS]), sizeof(st));
253	print_tcstats(fp, &st);
254	fprintf(fp, "\n");
255	}
256	}
257	if (q && tb[TCA_XSTATS]) {
258	q->print_xstats(q, fp, tb[TCA_XSTATS]);
259	fprintf(fp, "\n");
260	}
261	}
262	fflush(fp);
263	return 0;
264	}
265
266
267	int tc_qdisc_list(int argc, char **argv)
268	{
269	struct tcmsg t;
270	struct rtnl_handle rth;
271	char d[16];
272
273	memset(&t, 0, sizeof(t));
274	t.tcm_family = AF_UNSPEC;
275	memset(&d, 0, sizeof(d));
276
277	while (argc > 0) {
278	if (strcmp(*argv, "dev") == 0) {
279	NEXT_ARG();
280	strncpy(d, *argv, sizeof(d)-1);
281	#ifdef TC_H_INGRESS
282	} else if (strcmp(*argv, "ingress") == 0) {
283	if (t.tcm_parent) {
284	fprintf(stderr, "Duplicate parent ID\n");
285	usage();
286	}
287	t.tcm_parent = TC_H_INGRESS;
288	#endif
289	} else if (matches(*argv, "help") == 0) {
290	usage();
291	} else {
292	fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
293	return -1;
294	}
295
296	argc--; argv++;
297	}
298
299	if (rtnl_open(&rth, 0) < 0) {
300	fprintf(stderr, "Cannot open rtnetlink\n");
301	exit(1);
302	}
303
304	ll_init_map(&rth);
305
306	if (d[0]) {
307	if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
308	fprintf(stderr, "Cannot find device \"%s\"\n", d);
309	exit(1);
310	}
311	filter_ifindex = t.tcm_ifindex;
312	}
313
314	if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
315	perror("Cannot send dump request");
316	exit(1);
317	}
318
319	if (rtnl_dump_filter(&rth, print_qdisc, stdout, NULL, NULL) < 0) {
320	fprintf(stderr, "Dump terminated\n");
321	exit(1);
322	}
323
324	rtnl_close(&rth);
325	return 0;
326	}
327
328	int do_qdisc(int argc, char **argv)
329	{
330	if (argc < 1)
331	return tc_qdisc_list(0, NULL);
332	if (matches(*argv, "add") == 0)
333	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL\|NLM_F_CREATE, argc-1, argv+1);
334	if (matches(*argv, "change") == 0)
335	return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1);
336	if (matches(*argv, "replace") == 0)
337	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
338	if (matches(*argv, "link") == 0)
339	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1);
340	if (matches(*argv, "delete") == 0)
341	return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1);
342	#if 0
343	if (matches(*argv, "get") == 0)
344	return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1);
345	#endif
346	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
347	\|\| matches(*argv, "lst") == 0)
348	return tc_qdisc_list(argc-1, argv+1);
349	if (matches(*argv, "help") == 0)
350	usage();
351	fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv);
352	return -1;
353	}