| /* |
| * 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) |
| { |
| fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n"); |
| fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | clsact | 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 | clsact ]\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; |
| } |
| |
| static 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("invalid qdisc ID", *argv); |
| 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; |
| } else if (strcmp(*argv, "clsact") == 0) { |
| if (req.t.tcm_parent) { |
| fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n"); |
| return -1; |
| } |
| req.t.tcm_parent = TC_H_CLSACT; |
| strncpy(k, "clsact", sizeof(k) - 1); |
| q = get_qdisc_kind(k); |
| req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0); |
| NEXT_ARG_FWD(); |
| break; |
| } 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 = TC_H_MAKE(TC_H_INGRESS, 0); |
| NEXT_ARG_FWD(); |
| break; |
| } 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, "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) { |
| if (q->parse_qopt(q, argc, argv, &req.n)) |
| return 1; |
| } else if (argc) { |
| fprintf(stderr, "qdisc '%s' does not support option parsing\n", k); |
| 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, NULL, 0) < 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: ", rta_getattr_str(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; |
| } |
| |
| static 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); |
| } else if (strcmp(*argv, "ingress") == 0 || |
| strcmp(*argv, "clsact") == 0) { |
| if (t.tcm_parent) { |
| fprintf(stderr, "Duplicate parent ID\n"); |
| usage(); |
| } |
| t.tcm_parent = TC_H_INGRESS; |
| } 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) < 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; |
| } |