blob: 069a752b82be242d3721a7bb39f33335a66edd06 [file] [log] [blame]
/* Copyright (C) 2013 Cisco Systems, Inc, 2013.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Author: Vijay Subramanian <vijaynsu@cisco.com>
* Author: Mythili Prabhu <mysuryan@cisco.com>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <math.h>
#include "utils.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr, "Usage: ... pie [ limit PACKETS ][ target TIME us]\n");
fprintf(stderr, " [ tupdate TIME us][ alpha ALPHA ]");
fprintf(stderr, "[beta BETA ][bytemode | nobytemode][ecn | noecn ]\n");
}
#define ALPHA_MAX 32
#define ALPHA_MIN 0
#define BETA_MAX 32
#define BETA_MIN 0
static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n)
{
unsigned int limit = 0;
unsigned int target = 0;
unsigned int tupdate = 0;
unsigned int alpha = 0;
unsigned int beta = 0;
int ecn = -1;
int bytemode = -1;
struct rtattr *tail;
while (argc > 0) {
if (strcmp(*argv, "limit") == 0) {
NEXT_ARG();
if (get_unsigned(&limit, *argv, 0)) {
fprintf(stderr, "Illegal \"limit\"\n");
return -1;
}
} else if (strcmp(*argv, "target") == 0) {
NEXT_ARG();
if (get_time(&target, *argv)) {
fprintf(stderr, "Illegal \"target\"\n");
return -1;
}
} else if (strcmp(*argv, "tupdate") == 0) {
NEXT_ARG();
if (get_time(&tupdate, *argv)) {
fprintf(stderr, "Illegal \"tupdate\"\n");
return -1;
}
} else if (strcmp(*argv, "alpha") == 0) {
NEXT_ARG();
if (get_unsigned(&alpha, *argv, 0) ||
(alpha > ALPHA_MAX) || (alpha < ALPHA_MIN)) {
fprintf(stderr, "Illegal \"alpha\"\n");
return -1;
}
} else if (strcmp(*argv, "beta") == 0) {
NEXT_ARG();
if (get_unsigned(&beta, *argv, 0) ||
(beta > BETA_MAX) || (beta < BETA_MIN)) {
fprintf(stderr, "Illegal \"beta\"\n");
return -1;
}
} else if (strcmp(*argv, "ecn") == 0) {
ecn = 1;
} else if (strcmp(*argv, "noecn") == 0) {
ecn = 0;
} else if (strcmp(*argv, "bytemode") == 0) {
bytemode = 1;
} else if (strcmp(*argv, "nobytemode") == 0) {
bytemode = 0;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--;
argv++;
}
tail = NLMSG_TAIL(n);
addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
if (limit)
addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit));
if (tupdate)
addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate));
if (target)
addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target));
if (alpha)
addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha));
if (beta)
addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta));
if (ecn != -1)
addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn));
if (bytemode != -1)
addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode,
sizeof(bytemode));
tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
return 0;
}
static int pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_PIE_MAX + 1];
unsigned int limit;
unsigned int tupdate;
unsigned int target;
unsigned int alpha;
unsigned int beta;
unsigned int ecn;
unsigned int bytemode;
SPRINT_BUF(b1);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_PIE_MAX, opt);
if (tb[TCA_PIE_LIMIT] &&
RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) {
limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]);
fprintf(f, "limit %up ", limit);
}
if (tb[TCA_PIE_TARGET] &&
RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) {
target = rta_getattr_u32(tb[TCA_PIE_TARGET]);
fprintf(f, "target %s ", sprint_time(target, b1));
}
if (tb[TCA_PIE_TUPDATE] &&
RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) {
tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]);
fprintf(f, "tupdate %s ", sprint_time(tupdate, b1));
}
if (tb[TCA_PIE_ALPHA] &&
RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) {
alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]);
fprintf(f, "alpha %u ", alpha);
}
if (tb[TCA_PIE_BETA] &&
RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) {
beta = rta_getattr_u32(tb[TCA_PIE_BETA]);
fprintf(f, "beta %u ", beta);
}
if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) {
ecn = rta_getattr_u32(tb[TCA_PIE_ECN]);
if (ecn)
fprintf(f, "ecn ");
}
if (tb[TCA_PIE_BYTEMODE] &&
RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) {
bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]);
if (bytemode)
fprintf(f, "bytemode ");
}
return 0;
}
static int pie_print_xstats(struct qdisc_util *qu, FILE *f,
struct rtattr *xstats)
{
struct tc_pie_xstats *st;
if (xstats == NULL)
return 0;
if (RTA_PAYLOAD(xstats) < sizeof(*st))
return -1;
st = RTA_DATA(xstats);
/*prob is returned as a fracion of maximum integer value */
fprintf(f, "prob %f delay %uus avg_dq_rate %u\n",
(double)st->prob / (double)0xffffffff, st->delay,
st->avg_dq_rate);
fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n",
st->packets_in, st->overlimit, st->dropped, st->maxq,
st->ecn_mark);
return 0;
}
struct qdisc_util pie_qdisc_util = {
.id = "pie",
.parse_qopt = pie_parse_opt,
.print_qopt = pie_print_opt,
.print_xstats = pie_print_xstats,
};