| /* |
| * 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 <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" |
| #include "tc_common.h" |
| |
| static void usage(void) __attribute__((noreturn)); |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: tc class [ add | del | change | get ] dev STRING\n"); |
| fprintf(stderr, " [ classid CLASSID ] [ root | parent CLASSID ]\n"); |
| fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, " tc class show [ dev STRING ] [ root | parent CLASSID ]\n"); |
| fprintf(stderr, "Where:\n"); |
| fprintf(stderr, "QDISC_KIND := { prio | cbq | etc. }\n"); |
| fprintf(stderr, "OPTIONS := ... try tc class add <desired QDISC_KIND> help\n"); |
| exit(-1); |
| } |
| |
| int tc_class_modify(int cmd, unsigned flags, int argc, char **argv) |
| { |
| struct rtnl_handle rth; |
| struct { |
| struct nlmsghdr n; |
| struct tcmsg t; |
| char buf[4096]; |
| } req; |
| struct qdisc_util *q = NULL; |
| struct tc_estimator est; |
| char d[16]; |
| char k[16]; |
| |
| memset(&req, 0, sizeof(req)); |
| 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, "classid") == 0) { |
| __u32 handle; |
| NEXT_ARG(); |
| if (req.t.tcm_handle) |
| duparg("classid", *argv); |
| if (get_tc_classid(&handle, *argv)) |
| invarg(*argv, "invalid class 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"); |
| exit(-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(*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, "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); |
| exit(1); |
| } |
| if (q->parse_copt(q, argc, argv, &req.n)) |
| exit(1); |
| } else { |
| if (argc) { |
| if (matches(*argv, "help") == 0) |
| usage(); |
| fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv); |
| exit(-1); |
| } |
| } |
| |
| if (rtnl_open(&rth, 0) < 0) { |
| fprintf(stderr, "Cannot open rtnetlink\n"); |
| exit(1); |
| } |
| |
| if (d[0]) { |
| ll_init_map(&rth); |
| |
| if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", d); |
| exit(1); |
| } |
| } |
| |
| if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) |
| exit(2); |
| |
| rtnl_close(&rth); |
| return 0; |
| } |
| |
| void print_class_tcstats(FILE *fp, struct tc_stats *st) |
| { |
| SPRINT_BUF(b1); |
| |
| fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u) ", |
| (unsigned long long)st->bytes, st->packets, st->drops, st->overlimits); |
| if (st->bps || st->pps || st->qlen || st->backlog) { |
| fprintf(fp, "\n "); |
| if (st->bps || st->pps) { |
| fprintf(fp, "rate "); |
| if (st->bps) |
| fprintf(fp, "%s ", sprint_rate(st->bps, b1)); |
| if (st->pps) |
| fprintf(fp, "%upps ", st->pps); |
| } |
| if (st->qlen || st->backlog) { |
| fprintf(fp, "backlog "); |
| if (st->backlog) |
| fprintf(fp, "%s ", sprint_size(st->backlog, b1)); |
| if (st->qlen) |
| fprintf(fp, "%up ", st->qlen); |
| } |
| } |
| } |
| |
| int filter_ifindex; |
| __u32 filter_qdisc; |
| |
| static int print_class(const struct sockaddr_nl *who, |
| const 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 (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc)) |
| return 0; |
| |
| memset(tb, 0, sizeof(tb)); |
| parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); |
| |
| 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 ", (char*)RTA_DATA(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) { |
| if (tb[TCA_STATS]) { |
| if (RTA_PAYLOAD(tb[TCA_STATS]) < sizeof(struct tc_stats)) |
| fprintf(fp, "statistics truncated"); |
| else { |
| struct tc_stats st; |
| memcpy(&st, RTA_DATA(tb[TCA_STATS]), sizeof(st)); |
| print_class_tcstats(fp, &st); |
| fprintf(fp, "\n"); |
| } |
| } |
| if (q && tb[TCA_XSTATS] && q->print_xstats) { |
| q->print_xstats(q, fp, tb[TCA_XSTATS]); |
| fprintf(fp, "\n"); |
| } |
| } |
| fflush(fp); |
| return 0; |
| } |
| |
| |
| int tc_class_list(int argc, char **argv) |
| { |
| struct tcmsg t; |
| struct rtnl_handle rth; |
| 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(); |
| 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(*argv, "invalid qdisc ID"); |
| } else if (strcmp(*argv, "root") == 0) { |
| if (t.tcm_parent) { |
| fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); |
| exit(-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(*argv, "invalid parent ID"); |
| t.tcm_parent = handle; |
| } else if (matches(*argv, "help") == 0) { |
| usage(); |
| } else { |
| fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv); |
| exit(-1); |
| } |
| |
| argc--; argv++; |
| } |
| |
| if (rtnl_open(&rth, 0) < 0) { |
| fprintf(stderr, "Cannot open rtnetlink\n"); |
| exit(1); |
| } |
| |
| 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); |
| exit(1); |
| } |
| filter_ifindex = t.tcm_ifindex; |
| } |
| |
| if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) { |
| perror("Cannot send dump request"); |
| rtnl_close(&rth); |
| exit(1); |
| } |
| |
| if (rtnl_dump_filter(&rth, print_class, stdout, NULL, NULL) < 0) { |
| fprintf(stderr, "Dump terminated\n"); |
| rtnl_close(&rth); |
| exit(1); |
| } |
| |
| rtnl_close(&rth); |
| 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(); |
| fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv); |
| return -1; |
| } |