[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"
		"       [ handle QHANDLE ] [ root | ingress | clsact | parent CLASSID ]\n"
		"       [ estimator INTERVAL TIME_CONSTANT ]\n"
		"       [ stab [ help | STAB_OPTIONS] ]\n"
		"       [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n"
		"       [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
		"\n"
		"       tc qdisc { show | list } [ dev STRING ] [ QDISC_ID ] [ invisible ]\n"
		"Where:\n"
		"QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"
		"OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"
		"STAB_OPTIONS := ... try tc qdisc add stab help\n"
		"QDISC_ID := { root | ingress | handle QHANDLE | parent CLASSID }\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;
static __u32 filter_parent;
static __u32 filter_handle;

int print_qdisc(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;

	if (filter_handle && filter_handle != t->tcm_handle)
		return 0;

	if (filter_parent && filter_parent != t->tcm_parent)
		return 0;

	parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED);

	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
			fprintf(stderr, "Cannot parse qdisc parameters\n");
	}
	close_json_object();

	print_nl();

	if (show_details && tb[TCA_STAB]) {
		print_size_table(fp, " ", tb[TCA_STAB]);
		print_nl();
	}

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

		if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) {
			print_tcstats_attr(fp, tb, " ", &xstats);
			print_nl();
		}

		if (q && xstats && q->print_xstats) {
			q->print_xstats(q, fp, xstats);
			print_nl();
		}
	}
	close_json_object();
	fflush(fp);
	return 0;
}

static int tc_qdisc_list(int argc, char **argv)
{
	struct {
		struct nlmsghdr n;
		struct tcmsg t;
		char buf[256];
	} req = {
		.n.nlmsg_type = RTM_GETQDISC,
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
		.t.tcm_family = AF_UNSPEC,
	};

	char d[IFNAMSIZ] = {};
	bool dump_invisible = false;
	__u32 handle;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(d, *argv, sizeof(d)-1);
		} else if (strcmp(*argv, "root") == 0) {
			if (filter_parent)
				invarg("parent is already specified", *argv);
			else if (filter_handle)
				invarg("handle is already specified", *argv);
			filter_parent = TC_H_ROOT;
		} else if (strcmp(*argv, "ingress") == 0 ||
				strcmp(*argv, "clsact") == 0) {
			if (filter_parent)
				invarg("parent is already specified", *argv);
			else if (filter_handle)
				invarg("handle is already specified", *argv);
			filter_parent = TC_H_INGRESS;
		} else if (matches(*argv, "parent") == 0) {
			if (filter_parent)
				invarg("parent is already specified", *argv);
			else if (filter_handle)
				invarg("handle is already specified", *argv);
			NEXT_ARG();
			if (get_tc_classid(&handle, *argv))
				invarg("invalid parent ID", *argv);
			filter_parent = handle;
		} else if (matches(*argv, "handle") == 0) {
			if (filter_parent)
				invarg("parent is already specified", *argv);
			else if (filter_handle)
				invarg("handle is already specified", *argv);
			NEXT_ARG();
			if (get_qdisc_handle(&handle, *argv))
				invarg("invalid handle ID", *argv);
			filter_handle = handle;
		} 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]) {
		req.t.tcm_ifindex = ll_name_to_index(d);
		if (!req.t.tcm_ifindex)
			return -nodev(d);
		filter_ifindex = req.t.tcm_ifindex;
	}

	if (dump_invisible) {
		addattr(&req.n, 256, TCA_DUMP_INVISIBLE);
	}

	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
		perror("Cannot send 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 (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(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;
	struct qdisc_util *q;
	const char *kind;
	int err;

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

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

	parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED);

	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;
	}

	kind = rta_getattr_str(tb[TCA_KIND]);
	q = get_qdisc_kind(kind);
	if (!q)
		return -1;
	if (q->has_block) {
		bool found = false;

		err = q->has_block(q, tb[TCA_OPTIONS], ctx->block_index, &found);
		if (err)
			return err;
		if (found)
			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	{
8589eb4e MC	30	fprintf(stderr,
	31	"Usage: tc qdisc [ add \| del \| replace \| change \| show ] dev STRING\n"
	32	" [ handle QHANDLE ] [ root \| ingress \| clsact \| parent CLASSID ]\n"
	33	" [ estimator INTERVAL TIME_CONSTANT ]\n"
	34	" [ stab [ help \| STAB_OPTIONS] ]\n"
	35	" [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n"
	36	" [ [ QDISC_KIND ] [ help \| OPTIONS ] ]\n"
	37	"\n"
d80a05b7	38	" tc qdisc { show \| list } [ dev STRING ] [ QDISC_ID ] [ invisible ]\n"
8589eb4e MC	39	"Where:\n"
	40	"QDISC_KIND := { [p\|b]fifo \| tbf \| prio \| cbq \| red \| etc. }\n"
	41	"OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"
d80a05b7 AD	42	"STAB_OPTIONS := ... try tc qdisc add stab help\n"
d80a05b7 AD	43	"QDISC_ID := { root \| ingress \| handle QHANDLE \| parent CLASSID }\n");
11656f1b	44	return -1;
aba5acdf SH	45	}
aba5acdf SH	46
32a121cb	47	static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv)
aba5acdf	48	{
aba5acdf	49	struct qdisc_util *q = NULL;
9579afb2	50	struct tc_estimator est = {};
839c8456 JK	51	struct {
	52	struct tc_sizespec szopts;
	53	__u16 *data;
d17b136f	54	} stab = {};
b317557f SH	55	char d[IFNAMSIZ] = {};
b317557f SH	56	char k[FILTER_NAMESZ] = {};
f307c24e	57	struct {
32a121cb SH	58	struct nlmsghdr n;
	59	struct tcmsg t;
	60	char buf[TCA_BUF_MAX];
d17b136f PS	61	} req = {
	62	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
	63	.n.nlmsg_flags = NLM_F_REQUEST \| flags,
	64	.n.nlmsg_type = cmd,
	65	.t.tcm_family = AF_UNSPEC,
	66	};
063463ef JP	67	__u32 ingress_block = 0;
063463ef JP	68	__u32 egress_block = 0;
aba5acdf SH	69
	70	while (argc > 0) {
	71	if (strcmp(*argv, "dev") == 0) {
	72	NEXT_ARG();
	73	if (d[0])
	74	duparg("dev", *argv);
	75	strncpy(d, *argv, sizeof(d)-1);
	76	} else if (strcmp(*argv, "handle") == 0) {
	77	__u32 handle;
32a121cb	78
aba5acdf SH	79	if (req.t.tcm_handle)
	80	duparg("handle", *argv);
	81	NEXT_ARG();
	82	if (get_qdisc_handle(&handle, *argv))
f1675d61	83	invarg("invalid qdisc ID", *argv);
aba5acdf SH	84	req.t.tcm_handle = handle;
	85	} else if (strcmp(*argv, "root") == 0) {
	86	if (req.t.tcm_parent) {
	87	fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
11656f1b	88	return -1;
aba5acdf SH	89	}
aba5acdf SH	90	req.t.tcm_parent = TC_H_ROOT;
8f9afdd5 DB	91	} else if (strcmp(*argv, "clsact") == 0) {
	92	if (req.t.tcm_parent) {
	93	fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n");
	94	return -1;
	95	}
	96	req.t.tcm_parent = TC_H_CLSACT;
	97	strncpy(k, "clsact", sizeof(k) - 1);
	98	q = get_qdisc_kind(k);
	99	req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0);
	100	NEXT_ARG_FWD();
	101	break;
aba5acdf SH	102	} else if (strcmp(*argv, "ingress") == 0) {
	103	if (req.t.tcm_parent) {
	104	fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n");
11656f1b	105	return -1;
aba5acdf SH	106	}
aba5acdf SH	107	req.t.tcm_parent = TC_H_INGRESS;
0d45c4b4	108	strncpy(k, "ingress", sizeof(k) - 1);
aba5acdf	109	q = get_qdisc_kind(k);
0d45c4b4 DB	110	req.t.tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
0d45c4b4 DB	111	NEXT_ARG_FWD();
aba5acdf	112	break;
aba5acdf SH	113	} else if (strcmp(*argv, "parent") == 0) {
aba5acdf SH	114	__u32 handle;
32a121cb	115
aba5acdf SH	116	NEXT_ARG();
	117	if (req.t.tcm_parent)
	118	duparg("parent", *argv);
	119	if (get_tc_classid(&handle, *argv))
f1675d61	120	invarg("invalid parent ID", *argv);
aba5acdf SH	121	req.t.tcm_parent = handle;
	122	} else if (matches(*argv, "estimator") == 0) {
	123	if (parse_estimator(&argc, &argv, &est))
	124	return -1;
839c8456 JK	125	} else if (matches(*argv, "stab") == 0) {
	126	if (parse_size_table(&argc, &argv, &stab.szopts) < 0)
	127	return -1;
	128	continue;
063463ef JP	129	} else if (matches(*argv, "ingress_block") == 0) {
	130	NEXT_ARG();
	131	if (get_u32(&ingress_block, *argv, 0) \|\| !ingress_block)
	132	invarg("invalid ingress block index value", *argv);
	133	} else if (matches(*argv, "egress_block") == 0) {
	134	NEXT_ARG();
	135	if (get_u32(&egress_block, *argv, 0) \|\| !egress_block)
	136	invarg("invalid egress block index value", *argv);
aba5acdf SH	137	} else if (matches(*argv, "help") == 0) {
	138	usage();
	139	} else {
	140	strncpy(k, *argv, sizeof(k)-1);
	141
	142	q = get_qdisc_kind(k);
	143	argc--; argv++;
	144	break;
	145	}
	146	argc--; argv++;
	147	}
	148
	149	if (k[0])
	150	addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
	151	if (est.ewma_log)
	152	addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
	153
063463ef JP	154	if (ingress_block)
	155	addattr32(&req.n, sizeof(req),
	156	TCA_INGRESS_BLOCK, ingress_block);
	157	if (egress_block)
	158	addattr32(&req.n, sizeof(req),
	159	TCA_EGRESS_BLOCK, egress_block);
	160
0a502b21 SH	161	if (q) {
0a502b21 SH	162	if (q->parse_qopt) {
927e3cfb	163	if (q->parse_qopt(q, argc, argv, &req.n, d))
e9e78b0d	164	return 1;
0a502b21 SH	165	} else if (argc) {
	166	fprintf(stderr, "qdisc '%s' does not support option parsing\n", k);
	167	return -1;
	168	}
	169	} else {
	170	if (argc) {
aba5acdf SH	171	if (matches(*argv, "help") == 0)
	172	usage();
	173
	174	fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv);
11656f1b	175	return -1;
aba5acdf SH	176	}
	177	}
	178
839c8456 JK	179	if (check_size_table_opts(&stab.szopts)) {
	180	struct rtattr *tail;
	181
	182	if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) {
	183	fprintf(stderr, "failed to calculate size table.\n");
	184	return -1;
	185	}
	186
c14f9d92	187	tail = addattr_nest(&req.n, sizeof(req), TCA_STAB);
839c8456 JK	188	addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts,
	189	sizeof(stab.szopts));
	190	if (stab.data)
	191	addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data,
	192	stab.szopts.tsize * sizeof(__u16));
c14f9d92	193	addattr_nest_end(&req.n, tail);
839c8456 JK	194	if (stab.data)
	195	free(stab.data);
	196	}
	197
aba5acdf SH	198	if (d[0]) {
	199	int idx;
	200
3d0b7439	201	ll_init_map(&rth);
aba5acdf	202
b932e6f3	203	idx = ll_name_to_index(d);
fe99adbc SP	204	if (!idx)
fe99adbc SP	205	return -nodev(d);
aba5acdf SH	206	req.t.tcm_ifindex = idx;
	207	}
	208
86bf43c7	209	if (rtnl_talk(&rth, &req.n, NULL) < 0)
11656f1b	210	return 2;
aba5acdf	211
aba5acdf SH	212	return 0;
	213	}
	214
aba5acdf	215	static int filter_ifindex;
d80a05b7 AD	216	static __u32 filter_parent;
d80a05b7 AD	217	static __u32 filter_handle;
aba5acdf	218
cd554f2c	219	int print_qdisc(struct nlmsghdr n, void arg)
aba5acdf	220	{
32a121cb	221	FILE fp = (FILE )arg;
aba5acdf SH	222	struct tcmsg *t = NLMSG_DATA(n);
aba5acdf SH	223	int len = n->nlmsg_len;
32a121cb	224	struct rtattr *tb[TCA_MAX+1];
aba5acdf SH	225	struct qdisc_util *q;
	226	char abuf[256];
	227
	228	if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) {
	229	fprintf(stderr, "Not a qdisc\n");
	230	return 0;
	231	}
	232	len -= NLMSG_LENGTH(sizeof(*t));
	233	if (len < 0) {
	234	fprintf(stderr, "Wrong len %d\n", len);
	235	return -1;
	236	}
	237
	238	if (filter_ifindex && filter_ifindex != t->tcm_ifindex)
	239	return 0;
	240
d80a05b7 AD	241	if (filter_handle && filter_handle != t->tcm_handle)
	242	return 0;
	243
	244	if (filter_parent && filter_parent != t->tcm_parent)
	245	return 0;
	246
eae5f4b5	247	parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED);
aba5acdf SH	248
aba5acdf SH	249	if (tb[TCA_KIND] == NULL) {
2373fde9	250	fprintf(stderr, "print_qdisc: NULL kind\n");
aba5acdf SH	251	return -1;
	252	}
	253
c91d262f JP	254	open_json_object(NULL);
c91d262f JP	255
aba5acdf	256	if (n->nlmsg_type == RTM_DELQDISC)
c91d262f	257	print_bool(PRINT_ANY, "deleted", "deleted ", true);
aba5acdf	258
274b63ae RM	259	if (n->nlmsg_type == RTM_NEWQDISC &&
	260	(n->nlmsg_flags & NLM_F_CREATE) &&
	261	(n->nlmsg_flags & NLM_F_REPLACE))
c91d262f	262	print_bool(PRINT_ANY, "replaced", "replaced ", true);
274b63ae RM	263
	264	if (n->nlmsg_type == RTM_NEWQDISC &&
	265	(n->nlmsg_flags & NLM_F_CREATE) &&
	266	(n->nlmsg_flags & NLM_F_EXCL))
c91d262f JP	267	print_bool(PRINT_ANY, "added", "added ", true);
	268
	269	print_string(PRINT_ANY, "kind", "qdisc %s",
	270	rta_getattr_str(tb[TCA_KIND]));
	271	sprintf(abuf, "%x:", t->tcm_handle >> 16);
	272	print_string(PRINT_ANY, "handle", " %s", abuf);
	273	if (show_raw) {
	274	sprintf(abuf, "[%08x]", t->tcm_handle);
	275	print_string(PRINT_FP, NULL, "%s", abuf);
	276	}
	277	print_string(PRINT_FP, NULL, " ", NULL);
d42e1444	278
aba5acdf	279	if (filter_ifindex == 0)
2d165c08	280	print_devname(PRINT_ANY, t->tcm_ifindex);
b932e6f3	281
aba5acdf	282	if (t->tcm_parent == TC_H_ROOT)
c91d262f	283	print_bool(PRINT_ANY, "root", "root ", true);
aba5acdf SH	284	else if (t->tcm_parent) {
aba5acdf SH	285	print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
c91d262f	286	print_string(PRINT_ANY, "parent", "parent %s ", abuf);
aba5acdf	287	}
b932e6f3 SH	288
b932e6f3 SH	289	if (t->tcm_info != 1)
c91d262f	290	print_uint(PRINT_ANY, "refcnt", "refcnt %u ", t->tcm_info);
ae665a52	291
b97c6fa7 YM	292	if (tb[TCA_HW_OFFLOAD] &&
	293	(rta_getattr_u8(tb[TCA_HW_OFFLOAD])))
	294	print_bool(PRINT_ANY, "offloaded", "offloaded ", true);
	295
063463ef JP	296	if (tb[TCA_INGRESS_BLOCK] &&
	297	RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
	298	__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);
	299
	300	if (block)
	301	print_uint(PRINT_ANY, "ingress_block",
	302	"ingress_block %u ", block);
	303	}
	304
	305	if (tb[TCA_EGRESS_BLOCK] &&
	306	RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
	307	__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);
	308
	309	if (block)
	310	print_uint(PRINT_ANY, "egress_block",
	311	"egress_block %u ", block);
	312	}
	313
b932e6f3 SH	314	/* pfifo_fast is generic enough to warrant the hardcoding --JHS */
b932e6f3 SH	315	if (strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])) == 0)
2373fde9 SH	316	q = get_qdisc_kind("prio");
	317	else
	318	q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
ae665a52	319
c91d262f	320	open_json_object("options");
aba5acdf SH	321	if (tb[TCA_OPTIONS]) {
	322	if (q)
	323	q->print_qopt(q, fp, tb[TCA_OPTIONS]);
	324	else
d5ddb441	325	fprintf(stderr, "Cannot parse qdisc parameters\n");
aba5acdf	326	}
c91d262f JP	327	close_json_object();
c91d262f JP	328
7b0d424a	329	print_nl();
b932e6f3	330
839c8456 JK	331	if (show_details && tb[TCA_STAB]) {
839c8456 JK	332	print_size_table(fp, " ", tb[TCA_STAB]);
7b0d424a	333	print_nl();
839c8456	334	}
b932e6f3	335
aba5acdf	336	if (show_stats) {
e5879dc6	337	struct rtattr *xstats = NULL;
	338
	339	if (tb[TCA_STATS] \|\| tb[TCA_STATS2] \|\| tb[TCA_XSTATS]) {
	340	print_tcstats_attr(fp, tb, " ", &xstats);
7b0d424a	341	print_nl();
aba5acdf	342	}
649b0755	343
e5879dc6	344	if (q && xstats && q->print_xstats) {
e5879dc6	345	q->print_xstats(q, fp, xstats);
7b0d424a	346	print_nl();
aba5acdf SH	347	}
aba5acdf SH	348	}
c91d262f	349	close_json_object();
aba5acdf SH	350	fflush(fp);
	351	return 0;
	352	}
	353
d1f28cf1	354	static int tc_qdisc_list(int argc, char **argv)
aba5acdf	355	{
d80a05b7 AD	356	struct {
	357	struct nlmsghdr n;
	358	struct tcmsg t;
	359	char buf[256];
	360	} req = {
	361	.n.nlmsg_type = RTM_GETQDISC,
	362	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
	363	.t.tcm_family = AF_UNSPEC,
	364	};
	365
b317557f	366	char d[IFNAMSIZ] = {};
7c581a12	367	bool dump_invisible = false;
d80a05b7	368	__u32 handle;
ae665a52	369
aba5acdf SH	370	while (argc > 0) {
	371	if (strcmp(*argv, "dev") == 0) {
	372	NEXT_ARG();
	373	strncpy(d, *argv, sizeof(d)-1);
d80a05b7 AD	374	} else if (strcmp(*argv, "root") == 0) {
	375	if (filter_parent)
	376	invarg("parent is already specified", *argv);
	377	else if (filter_handle)
	378	invarg("handle is already specified", *argv);
	379	filter_parent = TC_H_ROOT;
32a121cb	380	} else if (strcmp(*argv, "ingress") == 0 \|\|
d80a05b7 AD	381	strcmp(*argv, "clsact") == 0) {
	382	if (filter_parent)
	383	invarg("parent is already specified", *argv);
	384	else if (filter_handle)
	385	invarg("handle is already specified", *argv);
	386	filter_parent = TC_H_INGRESS;
	387	} else if (matches(*argv, "parent") == 0) {
	388	if (filter_parent)
	389	invarg("parent is already specified", *argv);
	390	else if (filter_handle)
	391	invarg("handle is already specified", *argv);
	392	NEXT_ARG();
	393	if (get_tc_classid(&handle, *argv))
	394	invarg("invalid parent ID", *argv);
	395	filter_parent = handle;
	396	} else if (matches(*argv, "handle") == 0) {
	397	if (filter_parent)
	398	invarg("parent is already specified", *argv);
	399	else if (filter_handle)
	400	invarg("handle is already specified", *argv);
	401	NEXT_ARG();
	402	if (get_qdisc_handle(&handle, *argv))
	403	invarg("invalid handle ID", *argv);
	404	filter_handle = handle;
aba5acdf SH	405	} else if (matches(*argv, "help") == 0) {
aba5acdf SH	406	usage();
7c581a12 JK	407	} else if (strcmp(*argv, "invisible") == 0) {
7c581a12 JK	408	dump_invisible = true;
aba5acdf SH	409	} else {
	410	fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
	411	return -1;
	412	}
	413
	414	argc--; argv++;
	415	}
	416
3d0b7439	417	ll_init_map(&rth);
aba5acdf SH	418
aba5acdf SH	419	if (d[0]) {
d80a05b7 AD	420	req.t.tcm_ifindex = ll_name_to_index(d);
d80a05b7 AD	421	if (!req.t.tcm_ifindex)
fe99adbc	422	return -nodev(d);
d80a05b7	423	filter_ifindex = req.t.tcm_ifindex;
aba5acdf SH	424	}
aba5acdf SH	425
7c581a12	426	if (dump_invisible) {
7c581a12	427	addattr(&req.n, 256, TCA_DUMP_INVISIBLE);
d80a05b7	428	}
7c581a12	429
d80a05b7 AD	430	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
d80a05b7 AD	431	perror("Cannot send request");
11656f1b	432	return 1;
aba5acdf SH	433	}
aba5acdf SH	434
c91d262f	435	new_json_obj(json);
3d0b7439	436	if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) {
aba5acdf	437	fprintf(stderr, "Dump terminated\n");
11656f1b	438	return 1;
aba5acdf	439	}
c91d262f	440	delete_json_obj();
aba5acdf	441
aba5acdf SH	442	return 0;
	443	}
	444
	445	int do_qdisc(int argc, char **argv)
	446	{
	447	if (argc < 1)
	448	return tc_qdisc_list(0, NULL);
	449	if (matches(*argv, "add") == 0)
	450	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL\|NLM_F_CREATE, argc-1, argv+1);
	451	if (matches(*argv, "change") == 0)
	452	return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1);
	453	if (matches(*argv, "replace") == 0)
	454	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
	455	if (matches(*argv, "link") == 0)
	456	return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1);
	457	if (matches(*argv, "delete") == 0)
	458	return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1);
aba5acdf SH	459	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	460	\|\| matches(*argv, "lst") == 0)
	461	return tc_qdisc_list(argc-1, argv+1);
e5d179d8	462	if (matches(*argv, "help") == 0) {
aba5acdf	463	usage();
e5d179d8	464	return 0;
32a121cb	465	}
aba5acdf SH	466	fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv);
	467	return -1;
	468	}
d0bcedd5 JP	469
	470	struct tc_qdisc_block_exists_ctx {
	471	__u32 block_index;
	472	bool found;
	473	};
	474
cd554f2c	475	static int tc_qdisc_block_exists_cb(struct nlmsghdr n, void arg)
d0bcedd5 JP	476	{
	477	struct tc_qdisc_block_exists_ctx *ctx = arg;
	478	struct tcmsg *t = NLMSG_DATA(n);
	479	struct rtattr *tb[TCA_MAX+1];
	480	int len = n->nlmsg_len;
af0e036c PM	481	struct qdisc_util *q;
	482	const char *kind;
	483	int err;
d0bcedd5 JP	484
	485	if (n->nlmsg_type != RTM_NEWQDISC)
	486	return 0;
	487
	488	len -= NLMSG_LENGTH(sizeof(*t));
	489	if (len < 0)
	490	return -1;
	491
eae5f4b5	492	parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED);
d0bcedd5 JP	493
	494	if (tb[TCA_KIND] == NULL)
	495	return -1;
	496
	497	if (tb[TCA_INGRESS_BLOCK] &&
	498	RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) {
	499	__u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]);
	500
	501	if (block == ctx->block_index)
	502	ctx->found = true;
	503	}
	504
	505	if (tb[TCA_EGRESS_BLOCK] &&
	506	RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) {
	507	__u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]);
	508
	509	if (block == ctx->block_index)
	510	ctx->found = true;
	511	}
af0e036c PM	512
	513	kind = rta_getattr_str(tb[TCA_KIND]);
	514	q = get_qdisc_kind(kind);
	515	if (!q)
	516	return -1;
	517	if (q->has_block) {
	518	bool found = false;
	519
	520	err = q->has_block(q, tb[TCA_OPTIONS], ctx->block_index, &found);
	521	if (err)
	522	return err;
	523	if (found)
	524	ctx->found = true;
	525	}
	526
d0bcedd5 JP	527	return 0;
	528	}
	529
	530	bool tc_qdisc_block_exists(__u32 block_index)
	531	{
	532	struct tc_qdisc_block_exists_ctx ctx = { .block_index = block_index };
	533	struct tcmsg t = { .tcm_family = AF_UNSPEC };
	534
	535	if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
	536	perror("Cannot send dump request");
	537	return false;
	538	}
	539
	540	if (rtnl_dump_filter(&rth, tc_qdisc_block_exists_cb, &ctx) < 0) {
	541	perror("Dump terminated\n");
	542	return false;
	543	}
	544
	545	return ctx.found;
	546	}