| /* |
| * 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" |
| #include "hlist.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"); |
| 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"); |
| return; |
| } |
| |
| static int tc_class_modify(int cmd, unsigned flags, int argc, char **argv) |
| { |
| 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("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)) |
| 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); |
| |
| if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", d); |
| return 1; |
| } |
| } |
| |
| if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
| return 2; |
| |
| return 0; |
| } |
| |
| int filter_ifindex; |
| __u32 filter_qdisc; |
| __u32 filter_classid; |
| |
| static void graph_node_add(__u32 parent_id, __u32 id, void *data, |
| int len) |
| { |
| struct graph_node *node = malloc(sizeof(struct graph_node)); |
| |
| memset(node, 0, sizeof(*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[100] = {}; |
| |
| 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); |
| sprintf(str, "+---(%s)", cls_id_str); |
| strcat(buf, str); |
| |
| parse_rtattr(tb, TCA_MAX, (struct rtattr *)cls->data, |
| cls->data_len); |
| |
| 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(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_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(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 ", 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; |
| char d[16]; |
| char buf[1024] = {0}; |
| |
| memset(&t, 0, sizeof(t)); |
| t.tcm_family = AF_UNSPEC; |
| memset(d, 0, sizeof(d)); |
| |
| 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]) { |
| 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_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; |
| } |