/*
* 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 <syslog.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);
static int usage(void)
{
fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n");
fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | parent CLASSID ]\n");
fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
fprintf(stderr, " [ stab [ help | STAB_OPTIONS] ]\n");
fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n");
fprintf(stderr, "\n");
fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\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;
}
int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv)
{
struct qdisc_util *q = NULL;
struct tc_estimator est;
struct {
struct tc_sizespec szopts;
__u16 *data;
} stab;
char d[16];
char k[16];
struct {
struct nlmsghdr n;
struct tcmsg t;
char buf[TCA_BUF_MAX];
} req;
memset(&req, 0, sizeof(req));
memset(&stab, 0, sizeof(stab));
memset(&est, 0, sizeof(est));
memset(&d, 0, sizeof(d));
memset(&k, 0, sizeof(k));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
req.n.nlmsg_flags = NLM_F_REQUEST|flags;
req.n.nlmsg_type = cmd;
req.t.tcm_family = AF_UNSPEC;
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(*argv, "invalid qdisc ID");
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;
#ifdef TC_H_INGRESS
} 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 = 0xffff0000;
argc--; argv++;
break;
#endif
} 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(*argv, "invalid parent ID");
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, "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 (q) {
if (!q->parse_qopt) {
fprintf(stderr, "qdisc '%s' does not support option parsing\n", k);
return -1;
}
if (q->parse_qopt(q, argc, argv, &req.n))
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 = NLMSG_TAIL(&req.n);
addattr_l(&req.n, sizeof(req), TCA_STAB, NULL, 0);
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));
tail->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)tail;
if (stab.data)
free(stab.data);
}
if (d[0]) {
int idx;
ll_init_map(&rth);
if ((idx = ll_name_to_index(d)) == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", d);
return 1;
}
req.t.tcm_ifindex = idx;
}
if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, 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;
memset(tb, 0, sizeof(tb));
parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
if (tb[TCA_KIND] == NULL) {
fprintf(stderr, "print_qdisc: NULL kind\n");
return -1;
}
if (n->nlmsg_type == RTM_DELQDISC)
fprintf(fp, "deleted ");
fprintf(fp, "qdisc %s %x: ", (char*)RTA_DATA(tb[TCA_KIND]), t->tcm_handle>>16);
if (filter_ifindex == 0)
fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
if (t->tcm_parent == TC_H_ROOT)
fprintf(fp, "root ");
else if (t->tcm_parent) {
print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
fprintf(fp, "parent %s ", abuf);
}
if (t->tcm_info != 1) {
fprintf(fp, "refcnt %d ", t->tcm_info);
}
/* pfifo_fast is generic enough to warrant the hardcoding --JHS */
if (0 == strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])))
q = get_qdisc_kind("prio");
else
q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
if (tb[TCA_OPTIONS]) {
if (q)
q->print_qopt(q, fp, tb[TCA_OPTIONS]);
else
fprintf(fp, "[cannot parse qdisc parameters]");
}
fprintf(fp, "\n");
if (show_details && tb[TCA_STAB]) {
print_size_table(fp, " ", tb[TCA_STAB]);
fprintf(fp, "\n");
}
if (show_stats) {
struct rtattr *xstats = NULL;
if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) {
print_tcstats_attr(fp, tb, " ", &xstats);
fprintf(fp, "\n");
}
if (q && xstats && q->print_xstats) {
q->print_xstats(q, fp, xstats);
fprintf(fp, "\n");
}
}
fflush(fp);
return 0;
}
int tc_qdisc_list(int argc, char **argv)
{
struct tcmsg t;
char d[16];
memset(&t, 0, sizeof(t));
t.tcm_family = AF_UNSPEC;
memset(&d, 0, sizeof(d));
while (argc > 0) {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
strncpy(d, *argv, sizeof(d)-1);
#ifdef TC_H_INGRESS
} else if (strcmp(*argv, "ingress") == 0) {
if (t.tcm_parent) {
fprintf(stderr, "Duplicate parent ID\n");
usage();
}
t.tcm_parent = TC_H_INGRESS;
#endif
} else if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv);
return -1;
}
argc--; argv++;
}
ll_init_map(&rth);
if (d[0]) {
if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", d);
return 1;
}
filter_ifindex = t.tcm_ifindex;
}
if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) {
perror("Cannot send dump request");
return 1;
}
if (rtnl_dump_filter(&rth, print_qdisc, stdout, NULL, NULL) < 0) {
fprintf(stderr, "Dump terminated\n");
return 1;
}
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;
}