[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 <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <math.h>
#include <malloc.h>

#include "utils.h"
#include "tc_util.h"
#include "tc_common.h"

static int usage(void)
{
	fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n");
	fprintf(stderr, "       [ handle QHANDLE ] [ root | ingress | clsact | parent CLASSID ]\n");
	fprintf(stderr, "       [ estimator INTERVAL TIME_CONSTANT ]\n");
	fprintf(stderr, "       [ stab [ help | STAB_OPTIONS] ]\n");
	fprintf(stderr, "       [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n");
	fprintf(stderr, "       [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n");
	fprintf(stderr, "\n");
	fprintf(stderr, "       tc qdisc show [ dev STRING ] [ ingress | clsact ] [ invisible ]\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");
	fprintf(stderr, "STAB_OPTIONS := ... try tc qdisc add stab help\n");
	return -1;
}

static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv)
{
	struct qdisc_util *q = NULL;
	struct tc_estimator est = {};
	struct {
		struct tc_sizespec	szopts;
		__u16			*data;
	} stab = {};
	char  d[IFNAMSIZ] = {};
	char  k[FILTER_NAMESZ] = {};
	struct {
		struct nlmsghdr	n;
		struct tcmsg		t;
		char			buf[TCA_BUF_MAX];
	} req = {
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
		.n.nlmsg_flags = NLM_F_REQUEST | flags,
		.n.nlmsg_type = cmd,
		.t.tcm_family = AF_UNSPEC,
	};
	__u32 ingress_block = 0;
	__u32 egress_block = 0;

	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("invalid qdisc ID", *argv);
			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");
				return -1;
			}
			req.t.tcm_parent = TC_H_ROOT;
		} else if (strcmp(*argv, "clsact") == 0) {
			if (req.t.tcm_parent) {
				fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n");
				return -1;
			}
			req.t.tcm_parent = TC_H_CLSACT;
			strncpy(k, "clsact", sizeof(k) - 1);
			q = get_qdisc_kind(k);
			req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0);
			NEXT_ARG_FWD();
			break;
		} else if (strcmp(*argv, "ingress") == 0) {
			if (req.t.tcm_parent) {
				fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n");
				return -1;
			}
			req.t.tcm_parent = TC_H_INGRESS;
			strncpy(k, "ingress", sizeof(k) - 1);
			q = get_qdisc_kind(k);
			req.t.tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
			NEXT_ARG_FWD();
			break;
		} 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("invalid parent ID", *argv);
			req.t.tcm_parent = handle;
		} else if (matches(*argv, "estimator") == 0) {
			if (parse_estimator(&argc, &argv, &est))
				return -1;
		} else if (matches(*argv, "stab") == 0) {
			if (parse_size_table(&argc, &argv, &stab.szopts) < 0)
				return -1;
			continue;
		} else if (matches(*argv, "ingress_block") == 0) {
			NEXT_ARG();
			if (get_u32(&ingress_block, *argv, 0) || !ingress_block)
				invarg("invalid ingress block index value", *argv);
		} else if (matches(*argv, "egress_block") == 0) {
			NEXT_ARG();
			if (get_u32(&egress_block, *argv, 0) || !egress_block)
				invarg("invalid egress block index value", *argv);
		} 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 (ingress_block)
		addattr32(&req.n, sizeof(req),
			  TCA_INGRESS_BLOCK, ingress_block);
	if (egress_block)
		addattr32(&req.n, sizeof(req),
			  TCA_EGRESS_BLOCK, egress_block);

	if (q) {
		if (q->parse_qopt) {
			if (q->parse_qopt(q, argc, argv, &req.n, d))
				return 1;
		} else if (argc) {
			fprintf(stderr, "qdisc '%s' does not support option parsing\n", k);
			return -1;
		}
	} else {
		if (argc) {
			if (matches(*argv, "help") == 0)
				usage();

			fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv);
			return -1;
		}
	}

	if (check_size_table_opts(&stab.szopts)) {
		struct rtattr *tail;

		if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) {
			fprintf(stderr, "failed to calculate size table.\n");
			return -1;
		}

		tail = addattr_nest(&req.n, sizeof(req), TCA_STAB);
		addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts,
			  sizeof(stab.szopts));
		if (stab.data)
			addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data,
				  stab.szopts.tsize * sizeof(__u16));
		addattr_nest_end(&req.n, tail);
		if (stab.data)
			free(stab.data);
	}

	if (d[0])  {
		int idx;

		ll_init_map(&rth);

		idx = ll_name_to_index(d);
		if (!idx)
			return -nodev(d);
		req.t.tcm_ifindex = idx;
	}

	if (rtnl_talk(&rth, &req.n, NULL) < 0)
		return 2;

	return 0;
}

static int filter_ifindex;

int print_qdisc(const 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;

	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);

	if (tb[TCA_KIND] == NULL) {
		fprintf(stderr, "print_qdisc: NULL kind\n");
		return -1;
	}

	open_json_object(NULL);

	if (n->nlmsg_type == RTM_DELQDISC)
		print_bool(PRINT_ANY, "deleted", "deleted ", true);

	if (n->nlmsg_type == RTM_NEWQDISC &&
			(n->nlmsg_flags & NLM_F_CREATE) &&
			(n->nlmsg_flags & NLM_F_REPLACE))
		print_bool(PRINT_ANY, "replaced", "replaced ", true);

	if (n->nlmsg_type == RTM_NEWQDISC &&
			(n->nlmsg_flags & NLM_F_CREATE) &&
			(n->nlmsg_flags & NLM_F_EXCL))
		print_bool(PRINT_ANY, "added", "added ", true);

	print_string(PRINT_ANY, "kind", "qdisc %s",
		     rta_getattr_str(tb[TCA_KIND]));
	sprintf(abuf, "%x:", t->tcm_handle >> 16);
	print_string(PRINT_ANY, "handle", " %s", abuf);
	if (show_raw) {
		sprintf(abuf, "[%08x]", t->tcm_handle);
		print_string(PRINT_FP, NULL, "%s", abuf);
	}
	print_string(PRINT_FP, NULL, " ", NULL);

	if (filter_ifindex == 0)
		print_devname(PRINT_ANY, t->tcm_ifindex);

	if (t->tcm_parent == TC_H_ROOT)
		print_bool(PRINT_ANY, "root", "root ", true);
	else if (t->tcm_parent) {
		print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
		print_string(PRINT_ANY, "parent", "parent %s ", abuf);
	}

	if (t->tcm_info != 1)
		print_uint(PRINT_ANY, "refcnt", "refcnt %u ", t->tcm_info);

	if (tb[TCA_HW_OFFLOAD] &&
	    (rta_getattr_u8(tb[TCA_HW_OFFLOAD])))
		print_bool(PRINT_ANY, "offloaded", "offloaded ", true);

	if (tb[TCA_INGRESS_BLOCK] &&
	    RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
		__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);

		if (block)
			print_uint(PRINT_ANY, "ingress_block",
				   "ingress_block %u ", block);
	}

	if (tb[TCA_EGRESS_BLOCK] &&
	    RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
		__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);

		if (block)
			print_uint(PRINT_ANY, "egress_block",
				   "egress_block %u ", block);
	}

	/* pfifo_fast is generic enough to warrant the hardcoding --JHS */
	if (strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])) == 0)
		q = get_qdisc_kind("prio");
	else
		q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));

	open_json_object("options");
	if (tb[TCA_OPTIONS]) {
		if (q)
			q->print_qopt(q, fp, tb[TCA_OPTIONS]);
		else
			print_string(PRINT_FP, NULL,
				     "[cannot parse qdisc parameters]", NULL);
	}
	close_json_object();

	print_string(PRINT_FP, NULL, "\n", NULL);

	if (show_details && tb[TCA_STAB]) {
		print_size_table(fp, " ", tb[TCA_STAB]);
		print_string(PRINT_FP, NULL, "\n", NULL);
	}

	if (show_stats) {
		struct rtattr *xstats = NULL;

		if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) {
			print_tcstats_attr(fp, tb, " ", &xstats);
			print_string(PRINT_FP, NULL, "\n", NULL);
		}

		if (q && xstats && q->print_xstats) {
			q->print_xstats(q, fp, xstats);
			print_string(PRINT_FP, NULL, "\n", NULL);
		}
	}
	close_json_object();
	fflush(fp);
	return 0;
}

static int tc_qdisc_list(int argc, char **argv)
{
	struct tcmsg t = { .tcm_family = AF_UNSPEC };
	char d[IFNAMSIZ] = {};
	bool dump_invisible = false;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(d, *argv, sizeof(d)-1);
		} else if (strcmp(*argv, "ingress") == 0 ||
			   strcmp(*argv, "clsact") == 0) {
			if (t.tcm_parent) {
				fprintf(stderr, "Duplicate parent ID\n");
				usage();
			}
			t.tcm_parent = TC_H_INGRESS;
		} else if (matches(*argv, "help") == 0) {
			usage();
		} else if (strcmp(*argv, "invisible") == 0) {
			dump_invisible = true;
		} else {
			fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
			return -1;
		}

		argc--; argv++;
	}

	ll_init_map(&rth);

	if (d[0]) {
		t.tcm_ifindex = ll_name_to_index(d);
		if (!t.tcm_ifindex)
			return -nodev(d);
		filter_ifindex = t.tcm_ifindex;
	}

	if (dump_invisible) {
		struct {
			struct nlmsghdr n;
			struct tcmsg t;
			char buf[256];
		} req = {
			.n.nlmsg_type = RTM_GETQDISC,
			.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
		};

		req.t.tcm_family = AF_UNSPEC;

		addattr(&req.n, 256, TCA_DUMP_INVISIBLE);
		if (rtnl_dump_request_n(&rth, &req.n) < 0) {
			perror("Cannot send dump request");
			return 1;
		}

	} else if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
		perror("Cannot send dump request");
		return 1;
	}

	new_json_obj(json);
	if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) {
		fprintf(stderr, "Dump terminated\n");
		return 1;
	}
	delete_json_obj();

	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();
		return 0;
	}
	fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv);
	return -1;
}

struct tc_qdisc_block_exists_ctx {
	__u32 block_index;
	bool found;
};

static int tc_qdisc_block_exists_cb(const struct sockaddr_nl *who,
				    struct nlmsghdr *n, void *arg)
{
	struct tc_qdisc_block_exists_ctx *ctx = arg;
	struct tcmsg *t = NLMSG_DATA(n);
	struct rtattr *tb[TCA_MAX+1];
	int len = n->nlmsg_len;

	if (n->nlmsg_type != RTM_NEWQDISC)
		return 0;

	len -= NLMSG_LENGTH(sizeof(*t));
	if (len < 0)
		return -1;

	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);

	if (tb[TCA_KIND] == NULL)
		return -1;

	if (tb[TCA_INGRESS_BLOCK] &&
	    RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
		__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);

		if (block == ctx->block_index)
			ctx->found = true;
	}

	if (tb[TCA_EGRESS_BLOCK] &&
	    RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
		__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);

		if (block == ctx->block_index)
			ctx->found = true;
	}
	return 0;
}

bool tc_qdisc_block_exists(__u32 block_index)
{
	struct tc_qdisc_block_exists_ctx ctx = { .block_index = block_index };
	struct tcmsg t = { .tcm_family = AF_UNSPEC };

	if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
		perror("Cannot send dump request");
		return false;
	}

	if (rtnl_dump_filter(&rth, tc_qdisc_block_exists_cb, &ctx) < 0) {
		perror("Dump terminated\n");
		return false;
	}

	return ctx.found;
}
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>
aba5acdf SH	16	#include <fcntl.h>
	17	#include <sys/socket.h>
	18	#include <netinet/in.h>
	19	#include <arpa/inet.h>
	20	#include <string.h>
	21	#include <math.h>
839c8456	22	#include <malloc.h>
aba5acdf SH	23
	24	#include "utils.h"
	25	#include "tc_util.h"
	26	#include "tc_common.h"
	27
11656f1b	28	static int usage(void)
aba5acdf	29	{
e5d179d8	30	fprintf(stderr, "Usage: tc qdisc [ add \| del \| replace \| change \| show ] dev STRING\n");
8f9afdd5	31	fprintf(stderr, " [ handle QHANDLE ] [ root \| ingress \| clsact \| parent CLASSID ]\n");
aba5acdf	32	fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
839c8456	33	fprintf(stderr, " [ stab [ help \| STAB_OPTIONS] ]\n");
063463ef	34	fprintf(stderr, " [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n");
aba5acdf SH	35	fprintf(stderr, " [ [ QDISC_KIND ] [ help \| OPTIONS ] ]\n");
aba5acdf SH	36	fprintf(stderr, "\n");
7c581a12	37	fprintf(stderr, " tc qdisc show [ dev STRING ] [ ingress \| clsact ] [ invisible ]\n");
aba5acdf SH	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");
839c8456	41	fprintf(stderr, "STAB_OPTIONS := ... try tc qdisc add stab help\n");
11656f1b	42	return -1;
aba5acdf SH	43	}
aba5acdf SH	44
32a121cb	45	static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv)
aba5acdf	46	{
aba5acdf	47	struct qdisc_util *q = NULL;
9579afb2	48	struct tc_estimator est = {};
839c8456 JK	49	struct {
	50	struct tc_sizespec szopts;
	51	__u16 *data;
d17b136f	52	} stab = {};
b317557f SH	53	char d[IFNAMSIZ] = {};
b317557f SH	54	char k[FILTER_NAMESZ] = {};
f307c24e	55	struct {
32a121cb SH	56	struct nlmsghdr n;
	57	struct tcmsg t;
	58	char buf[TCA_BUF_MAX];
d17b136f PS	59	} req = {
	60	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
	61	.n.nlmsg_flags = NLM_F_REQUEST \| flags,
	62	.n.nlmsg_type = cmd,
	63	.t.tcm_family = AF_UNSPEC,
	64	};
063463ef JP	65	__u32 ingress_block = 0;
063463ef JP	66	__u32 egress_block = 0;
aba5acdf SH	67
	68	while (argc > 0) {
	69	if (strcmp(*argv, "dev") == 0) {
	70	NEXT_ARG();
	71	if (d[0])
	72	duparg("dev", *argv);
	73	strncpy(d, *argv, sizeof(d)-1);
	74	} else if (strcmp(*argv, "handle") == 0) {
	75	__u32 handle;
32a121cb	76
aba5acdf SH	77	if (req.t.tcm_handle)
	78	duparg("handle", *argv);
	79	NEXT_ARG();
	80	if (get_qdisc_handle(&handle, *argv))
f1675d61	81	invarg("invalid qdisc ID", *argv);
aba5acdf SH	82	req.t.tcm_handle = handle;
	83	} else if (strcmp(*argv, "root") == 0) {
	84	if (req.t.tcm_parent) {
	85	fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
11656f1b	86	return -1;
aba5acdf SH	87	}
aba5acdf SH	88	req.t.tcm_parent = TC_H_ROOT;
8f9afdd5 DB	89	} else if (strcmp(*argv, "clsact") == 0) {
	90	if (req.t.tcm_parent) {
	91	fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n");
	92	return -1;
	93	}
	94	req.t.tcm_parent = TC_H_CLSACT;
	95	strncpy(k, "clsact", sizeof(k) - 1);
	96	q = get_qdisc_kind(k);
	97	req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0);
	98	NEXT_ARG_FWD();
	99	break;
aba5acdf SH	100	} else if (strcmp(*argv, "ingress") == 0) {
	101	if (req.t.tcm_parent) {
	102	fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n");
11656f1b	103	return -1;
aba5acdf SH	104	}
aba5acdf SH	105	req.t.tcm_parent = TC_H_INGRESS;
0d45c4b4	106	strncpy(k, "ingress", sizeof(k) - 1);
aba5acdf	107	q = get_qdisc_kind(k);
0d45c4b4 DB	108	req.t.tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
0d45c4b4 DB	109	NEXT_ARG_FWD();
aba5acdf	110	break;
aba5acdf SH	111	} else if (strcmp(*argv, "parent") == 0) {
aba5acdf SH	112	__u32 handle;
32a121cb	113
aba5acdf SH	114	NEXT_ARG();
	115	if (req.t.tcm_parent)
	116	duparg("parent", *argv);
	117	if (get_tc_classid(&handle, *argv))
f1675d61	118	invarg("invalid parent ID", *argv);
aba5acdf SH	119	req.t.tcm_parent = handle;
	120	} else if (matches(*argv, "estimator") == 0) {
	121	if (parse_estimator(&argc, &argv, &est))
	122	return -1;
839c8456 JK	123	} else if (matches(*argv, "stab") == 0) {
	124	if (parse_size_table(&argc, &argv, &stab.szopts) < 0)
	125	return -1;
	126	continue;
063463ef JP	127	} else if (matches(*argv, "ingress_block") == 0) {
	128	NEXT_ARG();
	129	if (get_u32(&ingress_block, *argv, 0) \|\| !ingress_block)
	130	invarg("invalid ingress block index value", *argv);
	131	} else if (matches(*argv, "egress_block") == 0) {
	132	NEXT_ARG();
	133	if (get_u32(&egress_block, *argv, 0) \|\| !egress_block)
	134	invarg("invalid egress block index value", *argv);
aba5acdf SH	135	} else if (matches(*argv, "help") == 0) {
	136	usage();
	137	} else {
	138	strncpy(k, *argv, sizeof(k)-1);
	139
	140	q = get_qdisc_kind(k);
	141	argc--; argv++;
	142	break;
	143	}
	144	argc--; argv++;
	145	}
	146
	147	if (k[0])
	148	addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
	149	if (est.ewma_log)
	150	addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
	151
063463ef JP	152	if (ingress_block)
	153	addattr32(&req.n, sizeof(req),
	154	TCA_INGRESS_BLOCK, ingress_block);
	155	if (egress_block)
	156	addattr32(&req.n, sizeof(req),
	157	TCA_EGRESS_BLOCK, egress_block);
	158
0a502b21 SH	159	if (q) {
0a502b21 SH	160	if (q->parse_qopt) {
927e3cfb	161	if (q->parse_qopt(q, argc, argv, &req.n, d))
e9e78b0d	162	return 1;
0a502b21 SH	163	} else if (argc) {
	164	fprintf(stderr, "qdisc '%s' does not support option parsing\n", k);
	165	return -1;
	166	}
	167	} else {
	168	if (argc) {
aba5acdf SH	169	if (matches(*argv, "help") == 0)
	170	usage();
	171
	172	fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv);
11656f1b	173	return -1;
aba5acdf SH	174	}
	175	}
	176
839c8456 JK	177	if (check_size_table_opts(&stab.szopts)) {
	178	struct rtattr *tail;
	179
	180	if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) {
	181	fprintf(stderr, "failed to calculate size table.\n");
	182	return -1;
	183	}
	184
c14f9d92	185	tail = addattr_nest(&req.n, sizeof(req), TCA_STAB);
839c8456 JK	186	addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts,
	187	sizeof(stab.szopts));
	188	if (stab.data)
	189	addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data,
	190	stab.szopts.tsize * sizeof(__u16));
c14f9d92	191	addattr_nest_end(&req.n, tail);
839c8456 JK	192	if (stab.data)
	193	free(stab.data);
	194	}
	195
aba5acdf SH	196	if (d[0]) {
	197	int idx;
	198
3d0b7439	199	ll_init_map(&rth);
aba5acdf	200
b932e6f3	201	idx = ll_name_to_index(d);
fe99adbc SP	202	if (!idx)
fe99adbc SP	203	return -nodev(d);
aba5acdf SH	204	req.t.tcm_ifindex = idx;
	205	}
	206
86bf43c7	207	if (rtnl_talk(&rth, &req.n, NULL) < 0)
11656f1b	208	return 2;
aba5acdf	209
aba5acdf SH	210	return 0;
	211	}
	212
aba5acdf SH	213	static int filter_ifindex;
aba5acdf SH	214
ae665a52	215	int print_qdisc(const struct sockaddr_nl *who,
b932e6f3	216	struct nlmsghdr n, void arg)
aba5acdf	217	{
32a121cb	218	FILE fp = (FILE )arg;
aba5acdf SH	219	struct tcmsg *t = NLMSG_DATA(n);
aba5acdf SH	220	int len = n->nlmsg_len;
32a121cb	221	struct rtattr *tb[TCA_MAX+1];
aba5acdf SH	222	struct qdisc_util *q;
	223	char abuf[256];
	224
	225	if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) {
	226	fprintf(stderr, "Not a qdisc\n");
	227	return 0;
	228	}
	229	len -= NLMSG_LENGTH(sizeof(*t));
	230	if (len < 0) {
	231	fprintf(stderr, "Wrong len %d\n", len);
	232	return -1;
	233	}
	234
	235	if (filter_ifindex && filter_ifindex != t->tcm_ifindex)
	236	return 0;
	237
aba5acdf SH	238	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
	239
	240	if (tb[TCA_KIND] == NULL) {
2373fde9	241	fprintf(stderr, "print_qdisc: NULL kind\n");
aba5acdf SH	242	return -1;
	243	}
	244
c91d262f JP	245	open_json_object(NULL);
c91d262f JP	246
aba5acdf	247	if (n->nlmsg_type == RTM_DELQDISC)
c91d262f	248	print_bool(PRINT_ANY, "deleted", "deleted ", true);
aba5acdf	249
274b63ae RM	250	if (n->nlmsg_type == RTM_NEWQDISC &&
	251	(n->nlmsg_flags & NLM_F_CREATE) &&
	252	(n->nlmsg_flags & NLM_F_REPLACE))
c91d262f	253	print_bool(PRINT_ANY, "replaced", "replaced ", true);
274b63ae RM	254
	255	if (n->nlmsg_type == RTM_NEWQDISC &&
	256	(n->nlmsg_flags & NLM_F_CREATE) &&
	257	(n->nlmsg_flags & NLM_F_EXCL))
c91d262f JP	258	print_bool(PRINT_ANY, "added", "added ", true);
	259
	260	print_string(PRINT_ANY, "kind", "qdisc %s",
	261	rta_getattr_str(tb[TCA_KIND]));
	262	sprintf(abuf, "%x:", t->tcm_handle >> 16);
	263	print_string(PRINT_ANY, "handle", " %s", abuf);
	264	if (show_raw) {
	265	sprintf(abuf, "[%08x]", t->tcm_handle);
	266	print_string(PRINT_FP, NULL, "%s", abuf);
	267	}
	268	print_string(PRINT_FP, NULL, " ", NULL);
d42e1444	269
aba5acdf	270	if (filter_ifindex == 0)
2d165c08	271	print_devname(PRINT_ANY, t->tcm_ifindex);
b932e6f3	272
aba5acdf	273	if (t->tcm_parent == TC_H_ROOT)
c91d262f	274	print_bool(PRINT_ANY, "root", "root ", true);
aba5acdf SH	275	else if (t->tcm_parent) {
aba5acdf SH	276	print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
c91d262f	277	print_string(PRINT_ANY, "parent", "parent %s ", abuf);
aba5acdf	278	}
b932e6f3 SH	279
b932e6f3 SH	280	if (t->tcm_info != 1)
c91d262f	281	print_uint(PRINT_ANY, "refcnt", "refcnt %u ", t->tcm_info);
ae665a52	282
b97c6fa7 YM	283	if (tb[TCA_HW_OFFLOAD] &&
	284	(rta_getattr_u8(tb[TCA_HW_OFFLOAD])))
	285	print_bool(PRINT_ANY, "offloaded", "offloaded ", true);
	286
063463ef JP	287	if (tb[TCA_INGRESS_BLOCK] &&
	288	RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
	289	__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);
	290
	291	if (block)
	292	print_uint(PRINT_ANY, "ingress_block",
	293	"ingress_block %u ", block);
	294	}
	295
	296	if (tb[TCA_EGRESS_BLOCK] &&
	297	RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
	298	__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);
	299
	300	if (block)
	301	print_uint(PRINT_ANY, "egress_block",
	302	"egress_block %u ", block);
	303	}
	304
b932e6f3 SH	305	/* pfifo_fast is generic enough to warrant the hardcoding --JHS */
b932e6f3 SH	306	if (strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])) == 0)
2373fde9 SH	307	q = get_qdisc_kind("prio");
	308	else
	309	q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
ae665a52	310
c91d262f	311	open_json_object("options");
aba5acdf SH	312	if (tb[TCA_OPTIONS]) {
	313	if (q)
	314	q->print_qopt(q, fp, tb[TCA_OPTIONS]);
	315	else
c91d262f JP	316	print_string(PRINT_FP, NULL,
c91d262f JP	317	"[cannot parse qdisc parameters]", NULL);
aba5acdf	318	}
c91d262f JP	319	close_json_object();
	320
	321	print_string(PRINT_FP, NULL, "\n", NULL);
b932e6f3	322
839c8456 JK	323	if (show_details && tb[TCA_STAB]) {
839c8456 JK	324	print_size_table(fp, " ", tb[TCA_STAB]);
c91d262f	325	print_string(PRINT_FP, NULL, "\n", NULL);
839c8456	326	}
b932e6f3	327
aba5acdf	328	if (show_stats) {
e5879dc6	329	struct rtattr *xstats = NULL;
	330
	331	if (tb[TCA_STATS] \|\| tb[TCA_STATS2] \|\| tb[TCA_XSTATS]) {
	332	print_tcstats_attr(fp, tb, " ", &xstats);
c91d262f	333	print_string(PRINT_FP, NULL, "\n", NULL);
aba5acdf	334	}
649b0755	335
e5879dc6	336	if (q && xstats && q->print_xstats) {
e5879dc6	337	q->print_xstats(q, fp, xstats);
c91d262f	338	print_string(PRINT_FP, NULL, "\n", NULL);
aba5acdf SH	339	}
aba5acdf SH	340	}
c91d262f	341	close_json_object();
aba5acdf SH	342	fflush(fp);
	343	return 0;
	344	}
	345
d1f28cf1	346	static int tc_qdisc_list(int argc, char **argv)
aba5acdf	347	{
d17b136f	348	struct tcmsg t = { .tcm_family = AF_UNSPEC };
b317557f	349	char d[IFNAMSIZ] = {};
7c581a12	350	bool dump_invisible = false;
ae665a52	351
aba5acdf SH	352	while (argc > 0) {
	353	if (strcmp(*argv, "dev") == 0) {
	354	NEXT_ARG();
	355	strncpy(d, *argv, sizeof(d)-1);
32a121cb	356	} else if (strcmp(*argv, "ingress") == 0 \|\|
8f9afdd5	357	strcmp(*argv, "clsact") == 0) {
b932e6f3 SH	358	if (t.tcm_parent) {
	359	fprintf(stderr, "Duplicate parent ID\n");
	360	usage();
	361	}
	362	t.tcm_parent = TC_H_INGRESS;
aba5acdf SH	363	} else if (matches(*argv, "help") == 0) {
aba5acdf SH	364	usage();
7c581a12 JK	365	} else if (strcmp(*argv, "invisible") == 0) {
7c581a12 JK	366	dump_invisible = true;
aba5acdf SH	367	} else {
	368	fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
	369	return -1;
	370	}
	371
	372	argc--; argv++;
	373	}
	374
3d0b7439	375	ll_init_map(&rth);
aba5acdf SH	376
aba5acdf SH	377	if (d[0]) {
b932e6f3	378	t.tcm_ifindex = ll_name_to_index(d);
fe99adbc SP	379	if (!t.tcm_ifindex)
fe99adbc SP	380	return -nodev(d);
aba5acdf SH	381	filter_ifindex = t.tcm_ifindex;
	382	}
	383
7c581a12 JK	384	if (dump_invisible) {
	385	struct {
	386	struct nlmsghdr n;
	387	struct tcmsg t;
	388	char buf[256];
	389	} req = {
	390	.n.nlmsg_type = RTM_GETQDISC,
	391	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
	392	};
	393
	394	req.t.tcm_family = AF_UNSPEC;
	395
	396	addattr(&req.n, 256, TCA_DUMP_INVISIBLE);
	397	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
	398	perror("Cannot send dump request");
	399	return 1;
	400	}
	401
	402	} else if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
aba5acdf	403	perror("Cannot send dump request");
11656f1b	404	return 1;
aba5acdf SH	405	}
aba5acdf SH	406
c91d262f	407	new_json_obj(json);
3d0b7439	408	if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) {
aba5acdf	409	fprintf(stderr, "Dump terminated\n");
11656f1b	410	return 1;
aba5acdf	411	}
c91d262f	412	delete_json_obj();
aba5acdf	413
aba5acdf SH	414	return 0;
	415	}
	416
	417	int do_qdisc(int argc, char **argv)
	418	{
	419	if (argc < 1)
	420	return tc_qdisc_list(0, NULL);
	421	if (matches(*argv, "add") == 0)
	422	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL\|NLM_F_CREATE, argc-1, argv+1);
	423	if (matches(*argv, "change") == 0)
	424	return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1);
	425	if (matches(*argv, "replace") == 0)
	426	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
	427	if (matches(*argv, "link") == 0)
	428	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1);
	429	if (matches(*argv, "delete") == 0)
	430	return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1);
	431	#if 0
	432	if (matches(*argv, "get") == 0)
	433	return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1);
	434	#endif
	435	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	436	\|\| matches(*argv, "lst") == 0)
	437	return tc_qdisc_list(argc-1, argv+1);
e5d179d8	438	if (matches(*argv, "help") == 0) {
aba5acdf	439	usage();
e5d179d8	440	return 0;
32a121cb	441	}
aba5acdf SH	442	fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv);
	443	return -1;
	444	}
d0bcedd5 JP	445
	446	struct tc_qdisc_block_exists_ctx {
	447	__u32 block_index;
	448	bool found;
	449	};
	450
	451	static int tc_qdisc_block_exists_cb(const struct sockaddr_nl *who,
	452	struct nlmsghdr n, void arg)
	453	{
	454	struct tc_qdisc_block_exists_ctx *ctx = arg;
	455	struct tcmsg *t = NLMSG_DATA(n);
	456	struct rtattr *tb[TCA_MAX+1];
	457	int len = n->nlmsg_len;
	458
	459	if (n->nlmsg_type != RTM_NEWQDISC)
	460	return 0;
	461
	462	len -= NLMSG_LENGTH(sizeof(*t));
	463	if (len < 0)
	464	return -1;
	465
	466	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
	467
	468	if (tb[TCA_KIND] == NULL)
	469	return -1;
	470
	471	if (tb[TCA_INGRESS_BLOCK] &&
	472	RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
	473	__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);
	474
	475	if (block == ctx->block_index)
	476	ctx->found = true;
	477	}
	478
	479	if (tb[TCA_EGRESS_BLOCK] &&
	480	RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
	481	__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);
	482
	483	if (block == ctx->block_index)
	484	ctx->found = true;
	485	}
	486	return 0;
	487	}
	488
	489	bool tc_qdisc_block_exists(__u32 block_index)
	490	{
	491	struct tc_qdisc_block_exists_ctx ctx = { .block_index = block_index };
	492	struct tcmsg t = { .tcm_family = AF_UNSPEC };
	493
	494	if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
	495	perror("Cannot send dump request");
	496	return false;
	497	}
	498
	499	if (rtnl_dump_filter(&rth, tc_qdisc_block_exists_cb, &ctx) < 0) {
	500	perror("Dump terminated\n");
	501	return false;
	502	}
	503
	504	return ctx.found;
	505	}