/*
* tc_class.c "tc class".
*
* 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>
*
*/
#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 "utils.h"
#include "tc_util.h"
#include "tc_common.h"
#include "list.h"
struct graph_node {
struct hlist_node hlist;
__u32 id;
__u32 parent_id;
struct graph_node *parent_node;
struct graph_node *right_node;
void *data;
int data_len;
int nodes_count;
};
static struct hlist_head cls_list = {};
static struct hlist_head root_cls_list = {};
static void usage(void);
static void usage(void)
{
fprintf(stderr,
"Usage: tc class [ add | del | change | replace | show ] dev STRING\n"
" [ classid CLASSID ] [ root | parent CLASSID ]\n"
" [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
"\n"
" tc class show [ dev STRING ] [ root | parent CLASSID ]\n"
"Where:\n"
"QDISC_KIND := { prio | cbq | etc. }\n"
"OPTIONS := ... try tc class add <desired QDISC_KIND> help\n");
}
static int tc_class_modify(int cmd, unsigned int flags, int argc, char **argv)
{
struct {
struct nlmsghdr n;
struct tcmsg t;
char buf[4096];
} 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,
};
struct qdisc_util *q = NULL;
struct tc_estimator est = {};
char d[IFNAMSIZ] = {};
char k[FILTER_NAMESZ] = {};
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, "classid") == 0) {
__u32 handle;
NEXT_ARG();
if (req.t.tcm_handle)
duparg("classid", *argv);
if (get_tc_classid(&handle, *argv))
invarg("invalid class ID", *argv);
req.t.tcm_handle = handle;
} else if (strcmp(*argv, "handle") == 0) {
fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n");
return -1;
} 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, "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, "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_copt == NULL) {
fprintf(stderr, "Error: Qdisc \"%s\" is classless.\n", k);
return 1;
}
if (q->parse_copt(q, argc, argv, &req.n, d))
return 1;
} else {
if (argc) {
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv);
return -1;
}
}
if (d[0]) {
ll_init_map(&rth);
req.t.tcm_ifindex = ll_name_to_index(d);
if (!req.t.tcm_ifindex)
return -nodev(d);
}
if (rtnl_talk(&rth, &req.n, NULL) < 0)
return 2;
return 0;
}
static int filter_ifindex;
static __u32 filter_qdisc;
static __u32 filter_classid;
static void graph_node_add(__u32 parent_id, __u32 id, void *data,
int len)
{
struct graph_node *node = calloc(1, sizeof(struct graph_node));
node->id = id;
node->parent_id = parent_id;
if (data && len) {
node->data = malloc(len);
node->data_len = len;
memcpy(node->data, data, len);
}
if (parent_id == TC_H_ROOT)
hlist_add_head(&node->hlist, &root_cls_list);
else
hlist_add_head(&node->hlist, &cls_list);
}
static void graph_indent(char *buf, struct graph_node *node, int is_newline,
int add_spaces)
{
char spaces[100] = {0};
while (node && node->parent_node) {
node->parent_node->right_node = node;
node = node->parent_node;
}
while (node && node->right_node) {
if (node->hlist.next)
strcat(buf, "| ");
else
strcat(buf, " ");
node = node->right_node;
}
if (is_newline) {
if (node->hlist.next && node->nodes_count)
strcat(buf, "| |");
else if (node->hlist.next)
strcat(buf, "| ");
else if (node->nodes_count)
strcat(buf, " |");
else if (!node->hlist.next)
strcat(buf, " ");
}
if (add_spaces > 0) {
sprintf(spaces, "%-*s", add_spaces, "");
strcat(buf, spaces);
}
}
static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list,
int level)
{
struct hlist_node *n, *tmp_cls;
char cls_id_str[256] = {};
struct rtattr *tb[TCA_MAX + 1];
struct qdisc_util *q;
char str[300] = {};
hlist_for_each_safe(n, tmp_cls, root_list) {
struct hlist_node *c, *tmp_chld;
struct hlist_head children = {};
struct graph_node *cls = container_of(n, struct graph_node,
hlist);
hlist_for_each_safe(c, tmp_chld, &cls_list) {
struct graph_node *child = container_of(c,
struct graph_node, hlist);
if (cls->id == child->parent_id) {
hlist_del(c);
hlist_add_head(c, &children);
cls->nodes_count++;
child->parent_node = cls;
}
}
graph_indent(buf, cls, 0, 0);
print_tc_classid(cls_id_str, sizeof(cls_id_str), cls->id);
snprintf(str, sizeof(str),
"+---(%s)", cls_id_str);
strcat(buf, str);
parse_rtattr_flags(tb, TCA_MAX, (struct rtattr *)cls->data,
cls->data_len, NLA_F_NESTED);
if (tb[TCA_KIND] == NULL) {
strcat(buf, " [unknown qdisc kind] ");
} else {
const char *kind = rta_getattr_str(tb[TCA_KIND]);
sprintf(str, " %s ", kind);
strcat(buf, str);
fprintf(fp, "%s", buf);
buf[0] = '\0';
q = get_qdisc_kind(kind);
if (q && q->print_copt) {
q->print_copt(q, fp, tb[TCA_OPTIONS]);
}
if (q && show_stats) {
int cls_indent = strlen(q->id) - 2 +
strlen(cls_id_str);
struct rtattr *stats = NULL;
graph_indent(buf, cls, 1, cls_indent);
if (tb[TCA_STATS] || tb[TCA_STATS2]) {
fprintf(fp, "\n");
print_tcstats_attr(fp, tb, buf, &stats);
buf[0] = '\0';
}
if (cls->hlist.next || cls->nodes_count) {
strcat(buf, "\n");
graph_indent(buf, cls, 1, 0);
}
}
}
free(cls->data);
fprintf(fp, "%s\n", buf);
buf[0] = '\0';
graph_cls_show(fp, buf, &children, level + 1);
if (!cls->hlist.next) {
graph_indent(buf, cls, 0, 0);
strcat(buf, "\n");
}
fprintf(fp, "%s", buf);
buf[0] = '\0';
free(cls);
}
}
int print_class(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_NEWTCLASS && n->nlmsg_type != RTM_DELTCLASS) {
fprintf(stderr, "Not a class\n");
return 0;
}
len -= NLMSG_LENGTH(sizeof(*t));
if (len < 0) {
fprintf(stderr, "Wrong len %d\n", len);
return -1;
}
if (show_graph) {
graph_node_add(t->tcm_parent, t->tcm_handle, TCA_RTA(t), len);
return 0;
}
if (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc))
return 0;
if (filter_classid && t->tcm_handle != filter_classid)
return 0;
parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED);
if (tb[TCA_KIND] == NULL) {
fprintf(stderr, "print_class: NULL kind\n");
return -1;
}
if (n->nlmsg_type == RTM_DELTCLASS)
fprintf(fp, "deleted ");
abuf[0] = 0;
if (t->tcm_handle) {
if (filter_qdisc)
print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_handle));
else
print_tc_classid(abuf, sizeof(abuf), t->tcm_handle);
}
fprintf(fp, "class %s %s ", rta_getattr_str(tb[TCA_KIND]), abuf);
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 (filter_qdisc)
print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_parent));
else
print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
fprintf(fp, "parent %s ", abuf);
}
if (t->tcm_info)
fprintf(fp, "leaf %x: ", t->tcm_info>>16);
q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND]));
if (tb[TCA_OPTIONS]) {
if (q && q->print_copt)
q->print_copt(q, fp, tb[TCA_OPTIONS]);
else
fprintf(fp, "[cannot parse class parameters]");
}
fprintf(fp, "\n");
if (show_stats) {
struct rtattr *xstats = NULL;
if (tb[TCA_STATS] || tb[TCA_STATS2]) {
print_tcstats_attr(fp, tb, " ", &xstats);
fprintf(fp, "\n");
}
if (q && (xstats || tb[TCA_XSTATS]) && q->print_xstats) {
q->print_xstats(q, fp, xstats ? : tb[TCA_XSTATS]);
fprintf(fp, "\n");
}
}
fflush(fp);
return 0;
}
static int tc_class_list(int argc, char **argv)
{
struct tcmsg t = { .tcm_family = AF_UNSPEC };
char d[IFNAMSIZ] = {};
char buf[1024] = {0};
filter_qdisc = 0;
filter_classid = 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, "qdisc") == 0) {
NEXT_ARG();
if (filter_qdisc)
duparg("qdisc", *argv);
if (get_qdisc_handle(&filter_qdisc, *argv))
invarg("invalid qdisc ID", *argv);
} else if (strcmp(*argv, "classid") == 0) {
NEXT_ARG();
if (filter_classid)
duparg("classid", *argv);
if (get_tc_classid(&filter_classid, *argv))
invarg("invalid class ID", *argv);
} else if (strcmp(*argv, "root") == 0) {
if (t.tcm_parent) {
fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
return -1;
}
t.tcm_parent = TC_H_ROOT;
} else if (strcmp(*argv, "parent") == 0) {
__u32 handle;
if (t.tcm_parent)
duparg("parent", *argv);
NEXT_ARG();
if (get_tc_classid(&handle, *argv))
invarg("invalid parent ID", *argv);
t.tcm_parent = handle;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv);
return -1;
}
argc--; argv++;
}
ll_init_map(&rth);
if (d[0]) {
t.tcm_ifindex = ll_name_to_index(d);
if (!t.tcm_ifindex)
return -nodev(d);
filter_ifindex = t.tcm_ifindex;
}
if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) {
perror("Cannot send dump request");
return 1;
}
if (rtnl_dump_filter(&rth, print_class, stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
return 1;
}
if (show_graph)
graph_cls_show(stdout, &buf[0], &root_cls_list, 0);
return 0;
}
int do_class(int argc, char **argv)
{
if (argc < 1)
return tc_class_list(0, NULL);
if (matches(*argv, "add") == 0)
return tc_class_modify(RTM_NEWTCLASS, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1);
if (matches(*argv, "change") == 0)
return tc_class_modify(RTM_NEWTCLASS, 0, argc-1, argv+1);
if (matches(*argv, "replace") == 0)
return tc_class_modify(RTM_NEWTCLASS, NLM_F_CREATE, argc-1, argv+1);
if (matches(*argv, "delete") == 0)
return tc_class_modify(RTM_DELTCLASS, 0, argc-1, argv+1);
#if 0
if (matches(*argv, "get") == 0)
return tc_class_get(RTM_GETTCLASS, 0, argc-1, argv+1);
#endif
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|| matches(*argv, "lst") == 0)
return tc_class_list(argc-1, argv+1);
if (matches(*argv, "help") == 0) {
usage();
return 0;
}
fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv);
return -1;
}