Blame tc/q_fq_pie.c

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// SPDX-License-Identifier: GPL-2.0-only
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/*
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 * Flow Queue PIE
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 *
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 * Copyright (C) 2019 Mohit P. Tahiliani <tahiliani@nitk.edu.in>
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 * Copyright (C) 2019 Sachin D. Patil <sdp.sachin@gmail.com>
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 * Copyright (C) 2019 V. Saicharan <vsaicharan1998@gmail.com>
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 * Copyright (C) 2019 Mohit Bhasi <mohitbhasi1998@gmail.com>
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 * Copyright (C) 2019 Leslie Monis <lesliemonis@gmail.com>
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 * Copyright (C) 2019 Gautam Ramakrishnan <gautamramk@gmail.com>
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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 <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 "utils.h"
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#include "tc_util.h"
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static void explain(void)
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{
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	fprintf(stderr,
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		"Usage: ... fq_pie [ limit PACKETS ] [ flows NUMBER ]\n"
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		"                  [ target TIME ] [ tupdate TIME ]\n"
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		"                  [ alpha NUMBER ] [ beta NUMBER ]\n"
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		"                  [ quantum BYTES ] [ memory_limit BYTES ]\n"
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		"                  [ ecn_prob PERCENTAGE ] [ [no]ecn ]\n"
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		"                  [ [no]bytemode ] [ [no_]dq_rate_estimator ]\n");
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}
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#define ALPHA_MAX 32
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#define BETA_MAX 32
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static int fq_pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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			    struct nlmsghdr *n, const char *dev)
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{
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	unsigned int limit = 0;
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	unsigned int flows = 0;
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	unsigned int target = 0;
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	unsigned int tupdate = 0;
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	unsigned int alpha = 0;
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	unsigned int beta = 0;
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	unsigned int quantum = 0;
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	unsigned int memory_limit = 0;
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	unsigned int ecn_prob = 0;
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	int ecn = -1;
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	int bytemode = -1;
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	int dq_rate_estimator = -1;
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	struct rtattr *tail;
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	while (argc > 0) {
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		if (strcmp(*argv, "limit") == 0) {
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			NEXT_ARG();
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			if (get_unsigned(&limit, *argv, 0)) {
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				fprintf(stderr, "Illegal \"limit\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "flows") == 0) {
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			NEXT_ARG();
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			if (get_unsigned(&flows, *argv, 0)) {
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				fprintf(stderr, "Illegal \"flows\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "target") == 0) {
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			NEXT_ARG();
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			if (get_time(&target, *argv)) {
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				fprintf(stderr, "Illegal \"target\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "tupdate") == 0) {
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			NEXT_ARG();
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			if (get_time(&tupdate, *argv)) {
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				fprintf(stderr, "Illegal \"tupdate\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "alpha") == 0) {
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			NEXT_ARG();
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			if (get_unsigned(&alpha, *argv, 0) ||
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			    alpha > ALPHA_MAX) {
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				fprintf(stderr, "Illegal \"alpha\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "beta") == 0) {
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			NEXT_ARG();
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			if (get_unsigned(&beta, *argv, 0) ||
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			    beta > BETA_MAX) {
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				fprintf(stderr, "Illegal \"beta\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "quantum") == 0) {
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			NEXT_ARG();
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			if (get_size(&quantum, *argv)) {
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				fprintf(stderr, "Illegal \"quantum\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "memory_limit") == 0) {
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			NEXT_ARG();
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			if (get_size(&memory_limit, *argv)) {
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				fprintf(stderr, "Illegal \"memory_limit\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "ecn_prob") == 0) {
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			NEXT_ARG();
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			if (get_unsigned(&ecn_prob, *argv, 0) ||
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			    ecn_prob >= 100) {
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				fprintf(stderr, "Illegal \"ecn_prob\"\n");
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				return -1;
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			}
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		} else if (strcmp(*argv, "ecn") == 0) {
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			ecn = 1;
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		} else if (strcmp(*argv, "noecn") == 0) {
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			ecn = 0;
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		} else if (strcmp(*argv, "bytemode") == 0) {
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			bytemode = 1;
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		} else if (strcmp(*argv, "nobytemode") == 0) {
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			bytemode = 0;
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		} else if (strcmp(*argv, "dq_rate_estimator") == 0) {
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			dq_rate_estimator = 1;
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		} else if (strcmp(*argv, "no_dq_rate_estimator") == 0) {
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			dq_rate_estimator = 0;
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		} else if (strcmp(*argv, "help") == 0) {
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			explain();
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			return -1;
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		} else {
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			fprintf(stderr, "What is \"%s\"?\n", *argv);
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			explain();
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			return -1;
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		}
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		argc--;
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		argv++;
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	}
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	tail = addattr_nest(n, 1024, TCA_OPTIONS | NLA_F_NESTED);
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	if (limit)
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		addattr_l(n, 1024, TCA_FQ_PIE_LIMIT, &limit, sizeof(limit));
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	if (flows)
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		addattr_l(n, 1024, TCA_FQ_PIE_FLOWS, &flows, sizeof(flows));
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	if (target)
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		addattr_l(n, 1024, TCA_FQ_PIE_TARGET, &target, sizeof(target));
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	if (tupdate)
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		addattr_l(n, 1024, TCA_FQ_PIE_TUPDATE, &tupdate,
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			  sizeof(tupdate));
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	if (alpha)
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		addattr_l(n, 1024, TCA_FQ_PIE_ALPHA, &alpha, sizeof(alpha));
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	if (beta)
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		addattr_l(n, 1024, TCA_FQ_PIE_BETA, &beta, sizeof(beta));
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	if (quantum)
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		addattr_l(n, 1024, TCA_FQ_PIE_QUANTUM, &quantum,
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			  sizeof(quantum));
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	if (memory_limit)
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		addattr_l(n, 1024, TCA_FQ_PIE_MEMORY_LIMIT, &memory_limit,
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			  sizeof(memory_limit));
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	if (ecn_prob)
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		addattr_l(n, 1024, TCA_FQ_PIE_ECN_PROB, &ecn_prob,
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			  sizeof(ecn_prob));
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	if (ecn != -1)
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		addattr_l(n, 1024, TCA_FQ_PIE_ECN, &ecn, sizeof(ecn));
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	if (bytemode != -1)
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		addattr_l(n, 1024, TCA_FQ_PIE_BYTEMODE, &bytemode,
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			  sizeof(bytemode));
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	if (dq_rate_estimator != -1)
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		addattr_l(n, 1024, TCA_FQ_PIE_DQ_RATE_ESTIMATOR,
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			  &dq_rate_estimator, sizeof(dq_rate_estimator));
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	addattr_nest_end(n, tail);
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	return 0;
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}
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static int fq_pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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	struct rtattr *tb[TCA_FQ_PIE_MAX + 1];
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	unsigned int limit = 0;
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	unsigned int flows = 0;
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	unsigned int target = 0;
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	unsigned int tupdate = 0;
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	unsigned int alpha = 0;
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	unsigned int beta = 0;
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	unsigned int quantum = 0;
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	unsigned int memory_limit = 0;
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	unsigned int ecn_prob = 0;
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	int ecn = -1;
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	int bytemode = -1;
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	int dq_rate_estimator = -1;
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	SPRINT_BUF(b1);
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	if (opt == NULL)
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		return 0;
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	parse_rtattr_nested(tb, TCA_FQ_PIE_MAX, opt);
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	if (tb[TCA_FQ_PIE_LIMIT] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_LIMIT]) >= sizeof(__u32)) {
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		limit = rta_getattr_u32(tb[TCA_FQ_PIE_LIMIT]);
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		print_uint(PRINT_ANY, "limit", "limit %up ", limit);
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	}
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	if (tb[TCA_FQ_PIE_FLOWS] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_FLOWS]) >= sizeof(__u32)) {
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		flows = rta_getattr_u32(tb[TCA_FQ_PIE_FLOWS]);
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		print_uint(PRINT_ANY, "flows", "flows %u ", flows);
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	}
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	if (tb[TCA_FQ_PIE_TARGET] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_TARGET]) >= sizeof(__u32)) {
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		target = rta_getattr_u32(tb[TCA_FQ_PIE_TARGET]);
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		print_uint(PRINT_JSON, "target", NULL, target);
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		print_string(PRINT_FP, NULL, "target %s ",
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			     sprint_time(target, b1));
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	}
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	if (tb[TCA_FQ_PIE_TUPDATE] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_TUPDATE]) >= sizeof(__u32)) {
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		tupdate = rta_getattr_u32(tb[TCA_FQ_PIE_TUPDATE]);
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		print_uint(PRINT_JSON, "tupdate", NULL, tupdate);
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		print_string(PRINT_FP, NULL, "tupdate %s ",
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			     sprint_time(tupdate, b1));
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	}
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	if (tb[TCA_FQ_PIE_ALPHA] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_ALPHA]) >= sizeof(__u32)) {
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		alpha = rta_getattr_u32(tb[TCA_FQ_PIE_ALPHA]);
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		print_uint(PRINT_ANY, "alpha", "alpha %u ", alpha);
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	}
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	if (tb[TCA_FQ_PIE_BETA] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_BETA]) >= sizeof(__u32)) {
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		beta = rta_getattr_u32(tb[TCA_FQ_PIE_BETA]);
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		print_uint(PRINT_ANY, "beta", "beta %u ", beta);
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	}
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	if (tb[TCA_FQ_PIE_QUANTUM] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_QUANTUM]) >= sizeof(__u32)) {
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		quantum = rta_getattr_u32(tb[TCA_FQ_PIE_QUANTUM]);
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		print_uint(PRINT_JSON, "quantum", NULL, quantum);
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		print_string(PRINT_FP, NULL, "quantum %s ",
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			     sprint_size(quantum, b1));
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	}
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	if (tb[TCA_FQ_PIE_MEMORY_LIMIT] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_MEMORY_LIMIT]) >= sizeof(__u32)) {
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		memory_limit = rta_getattr_u32(tb[TCA_FQ_PIE_MEMORY_LIMIT]);
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		print_uint(PRINT_JSON, "memory_limit", NULL, memory_limit);
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		print_string(PRINT_FP, NULL, "memory_limit %s ",
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			     sprint_size(memory_limit, b1));
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	}
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	if (tb[TCA_FQ_PIE_ECN_PROB] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_ECN_PROB]) >= sizeof(__u32)) {
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		ecn_prob = rta_getattr_u32(tb[TCA_FQ_PIE_ECN_PROB]);
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		print_uint(PRINT_ANY, "ecn_prob", "ecn_prob %u ", ecn_prob);
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	}
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	if (tb[TCA_FQ_PIE_ECN] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_ECN]) >= sizeof(__u32)) {
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		ecn = rta_getattr_u32(tb[TCA_FQ_PIE_ECN]);
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		if (ecn)
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			print_bool(PRINT_ANY, "ecn", "ecn ", true);
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	}
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	if (tb[TCA_FQ_PIE_BYTEMODE] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_BYTEMODE]) >= sizeof(__u32)) {
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		bytemode = rta_getattr_u32(tb[TCA_FQ_PIE_BYTEMODE]);
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		if (bytemode)
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			print_bool(PRINT_ANY, "bytemode", "bytemode ", true);
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	}
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	if (tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR] &&
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	    RTA_PAYLOAD(tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR]) >= sizeof(__u32)) {
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		dq_rate_estimator =
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			rta_getattr_u32(tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR]);
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		if (dq_rate_estimator)
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			print_bool(PRINT_ANY, "dq_rate_estimator",
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				   "dq_rate_estimator ", true);
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	}
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	return 0;
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}
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static int fq_pie_print_xstats(struct qdisc_util *qu, FILE *f,
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			       struct rtattr *xstats)
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{
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	struct tc_fq_pie_xstats _st = {}, *st;
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	if (xstats == NULL)
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		return 0;
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	st = RTA_DATA(xstats);
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	if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
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		memcpy(&_st, st, RTA_PAYLOAD(xstats));
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		st = &_st;
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	}
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	print_uint(PRINT_ANY, "pkts_in", "  pkts_in %u",
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		   st->packets_in);
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	print_uint(PRINT_ANY, "overlimit", " overlimit %u",
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		   st->overlimit);
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	print_uint(PRINT_ANY, "overmemory", " overmemory %u",
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		   st->overmemory);
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	print_uint(PRINT_ANY, "dropped", " dropped %u",
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		   st->dropped);
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	print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u",
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		   st->ecn_mark);
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	print_nl();
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	print_uint(PRINT_ANY, "new_flow_count", "  new_flow_count %u",
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		   st->new_flow_count);
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	print_uint(PRINT_ANY, "new_flows_len", " new_flows_len %u",
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		   st->new_flows_len);
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	print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u",
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		   st->old_flows_len);
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	print_uint(PRINT_ANY, "memory_used", " memory_used %u",
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		   st->memory_usage);
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	return 0;
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}
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struct qdisc_util fq_pie_qdisc_util = {
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	.id		= "fq_pie",
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	.parse_qopt	= fq_pie_parse_opt,
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	.print_qopt	= fq_pie_print_opt,
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	.print_xstats	= fq_pie_print_xstats,
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};