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/* Copyright (C) 2013 Cisco Systems, Inc, 2013.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Author: Vijay Subramanian <vijaynsu@cisco.com>
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* Author: Mythili Prabhu <mysuryan@cisco.com>
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*
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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 <math.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: ... pie [ limit PACKETS ] [ target TIME ]\n"
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" [ tupdate TIME ] [ alpha ALPHA ] [ beta BETA ]\n"
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" [ bytemode | nobytemode ] [ ecn | noecn ]\n"
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" [ dq_rate_estimator | 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 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 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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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, "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, "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);
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if (limit)
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addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
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if (tupdate)
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addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
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if (target)
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addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
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if (alpha)
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addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
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if (beta)
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addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
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if (ecn != -1)
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addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
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if (bytemode != -1)
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addattr_l(n, 1024, TCA_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_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 pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_PIE_MAX + 1];
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unsigned int limit;
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unsigned int tupdate;
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unsigned int target;
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unsigned int alpha;
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unsigned int beta;
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unsigned int ecn;
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unsigned int bytemode;
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unsigned int dq_rate_estimator;
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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_PIE_MAX, opt);
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if (tb[TCA_PIE_LIMIT] &&
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RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
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limit = rta_getattr_u32(tb[TCA_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_PIE_TARGET] &&
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RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
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target = rta_getattr_u32(tb[TCA_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_PIE_TUPDATE] &&
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RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
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tupdate = rta_getattr_u32(tb[TCA_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_PIE_ALPHA] &&
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RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
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alpha = rta_getattr_u32(tb[TCA_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_PIE_BETA] &&
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RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
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beta = rta_getattr_u32(tb[TCA_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_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
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ecn = rta_getattr_u32(tb[TCA_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_PIE_BYTEMODE] &&
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RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
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bytemode = rta_getattr_u32(tb[TCA_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_PIE_DQ_RATE_ESTIMATOR] &&
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RTA_PAYLOAD(tb[TCA_PIE_DQ_RATE_ESTIMATOR]) >= sizeof(__u32)) {
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dq_rate_estimator =
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rta_getattr_u32(tb[TCA_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 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_pie_xstats *st;
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SPRINT_BUF(b1);
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if (xstats == NULL)
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return 0;
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if (RTA_PAYLOAD(xstats) < sizeof(*st))
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return -1;
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st = RTA_DATA(xstats);
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/* prob is returned as a fracion of maximum integer value */
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print_float(PRINT_ANY, "prob", " prob %lg",
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(double)st->prob / (double)UINT64_MAX);
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print_uint(PRINT_JSON, "delay", NULL, st->delay);
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print_string(PRINT_FP, NULL, " delay %s", sprint_time(st->delay, b1));
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if (st->dq_rate_estimating)
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print_uint(PRINT_ANY, "avg_dq_rate", " avg_dq_rate %u",
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st->avg_dq_rate);
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print_nl();
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print_uint(PRINT_ANY, "pkts_in", " pkts_in %u", st->packets_in);
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print_uint(PRINT_ANY, "overlimit", " overlimit %u", st->overlimit);
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print_uint(PRINT_ANY, "dropped", " dropped %u", st->dropped);
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print_uint(PRINT_ANY, "maxq", " maxq %u", st->maxq);
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print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u", st->ecn_mark);
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return 0;
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}
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struct qdisc_util pie_qdisc_util = {
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.id = "pie",
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.parse_qopt = pie_parse_opt,
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.print_qopt = pie_print_opt,
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.print_xstats = pie_print_xstats,
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};
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