1 /* 2 * tc_class.c "tc class". 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet (at) ms2.inr.ac.ru> 10 * 11 */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <unistd.h> 16 #include <syslog.h> 17 #include <fcntl.h> 18 #include <sys/socket.h> 19 #include <netinet/in.h> 20 #include <arpa/inet.h> 21 #include <string.h> 22 #include <math.h> 23 24 #include "utils.h" 25 #include "tc_util.h" 26 #include "tc_common.h" 27 #include "list.h" 28 29 struct graph_node { 30 struct hlist_node hlist; 31 __u32 id; 32 __u32 parent_id; 33 struct graph_node *parent_node; 34 struct graph_node *right_node; 35 void *data; 36 int data_len; 37 int nodes_count; 38 }; 39 40 static struct hlist_head cls_list = {}; 41 static struct hlist_head root_cls_list = {}; 42 43 static void usage(void); 44 45 static void usage(void) 46 { 47 fprintf(stderr, "Usage: tc class [ add | del | change | replace | show ] dev STRING\n"); 48 fprintf(stderr, " [ classid CLASSID ] [ root | parent CLASSID ]\n"); 49 fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); 50 fprintf(stderr, "\n"); 51 fprintf(stderr, " tc class show [ dev STRING ] [ root | parent CLASSID ]\n"); 52 fprintf(stderr, "Where:\n"); 53 fprintf(stderr, "QDISC_KIND := { prio | cbq | etc. }\n"); 54 fprintf(stderr, "OPTIONS := ... try tc class add <desired QDISC_KIND> help\n"); 55 } 56 57 static int tc_class_modify(int cmd, unsigned int flags, int argc, char **argv) 58 { 59 struct { 60 struct nlmsghdr n; 61 struct tcmsg t; 62 char buf[4096]; 63 } req = { 64 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), 65 .n.nlmsg_flags = NLM_F_REQUEST | flags, 66 .n.nlmsg_type = cmd, 67 .t.tcm_family = AF_UNSPEC, 68 }; 69 struct qdisc_util *q = NULL; 70 struct tc_estimator est = {}; 71 char d[16] = {}; 72 char k[16] = {}; 73 74 while (argc > 0) { 75 if (strcmp(*argv, "dev") == 0) { 76 NEXT_ARG(); 77 if (d[0]) 78 duparg("dev", *argv); 79 strncpy(d, *argv, sizeof(d)-1); 80 } else if (strcmp(*argv, "classid") == 0) { 81 __u32 handle; 82 83 NEXT_ARG(); 84 if (req.t.tcm_handle) 85 duparg("classid", *argv); 86 if (get_tc_classid(&handle, *argv)) 87 invarg("invalid class ID", *argv); 88 req.t.tcm_handle = handle; 89 } else if (strcmp(*argv, "handle") == 0) { 90 fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n"); 91 return -1; 92 } else if (strcmp(*argv, "root") == 0) { 93 if (req.t.tcm_parent) { 94 fprintf(stderr, "Error: \"root\" is duplicate parent ID.\n"); 95 return -1; 96 } 97 req.t.tcm_parent = TC_H_ROOT; 98 } else if (strcmp(*argv, "parent") == 0) { 99 __u32 handle; 100 101 NEXT_ARG(); 102 if (req.t.tcm_parent) 103 duparg("parent", *argv); 104 if (get_tc_classid(&handle, *argv)) 105 invarg("invalid parent ID", *argv); 106 req.t.tcm_parent = handle; 107 } else if (matches(*argv, "estimator") == 0) { 108 if (parse_estimator(&argc, &argv, &est)) 109 return -1; 110 } else if (matches(*argv, "help") == 0) { 111 usage(); 112 } else { 113 strncpy(k, *argv, sizeof(k)-1); 114 115 q = get_qdisc_kind(k); 116 argc--; argv++; 117 break; 118 } 119 argc--; argv++; 120 } 121 122 if (k[0]) 123 addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); 124 if (est.ewma_log) 125 addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); 126 127 if (q) { 128 if (q->parse_copt == NULL) { 129 fprintf(stderr, "Error: Qdisc \"%s\" is classless.\n", k); 130 return 1; 131 } 132 if (q->parse_copt(q, argc, argv, &req.n)) 133 return 1; 134 } else { 135 if (argc) { 136 if (matches(*argv, "help") == 0) 137 usage(); 138 fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv); 139 return -1; 140 } 141 } 142 143 if (d[0]) { 144 ll_init_map(&rth); 145 146 if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { 147 fprintf(stderr, "Cannot find device \"%s\"\n", d); 148 return 1; 149 } 150 } 151 152 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) 153 return 2; 154 155 return 0; 156 } 157 158 int filter_ifindex; 159 __u32 filter_qdisc; 160 __u32 filter_classid; 161 162 static void graph_node_add(__u32 parent_id, __u32 id, void *data, 163 int len) 164 { 165 struct graph_node *node = calloc(1, sizeof(struct graph_node)); 166 167 node->id = id; 168 node->parent_id = parent_id; 169 170 if (data && len) { 171 node->data = malloc(len); 172 node->data_len = len; 173 memcpy(node->data, data, len); 174 } 175 176 if (parent_id == TC_H_ROOT) 177 hlist_add_head(&node->hlist, &root_cls_list); 178 else 179 hlist_add_head(&node->hlist, &cls_list); 180 } 181 182 static void graph_indent(char *buf, struct graph_node *node, int is_newline, 183 int add_spaces) 184 { 185 char spaces[100] = {0}; 186 187 while (node && node->parent_node) { 188 node->parent_node->right_node = node; 189 node = node->parent_node; 190 } 191 while (node && node->right_node) { 192 if (node->hlist.next) 193 strcat(buf, "| "); 194 else 195 strcat(buf, " "); 196 197 node = node->right_node; 198 } 199 200 if (is_newline) { 201 if (node->hlist.next && node->nodes_count) 202 strcat(buf, "| |"); 203 else if (node->hlist.next) 204 strcat(buf, "| "); 205 else if (node->nodes_count) 206 strcat(buf, " |"); 207 else if (!node->hlist.next) 208 strcat(buf, " "); 209 } 210 if (add_spaces > 0) { 211 sprintf(spaces, "%-*s", add_spaces, ""); 212 strcat(buf, spaces); 213 } 214 } 215 216 static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list, 217 int level) 218 { 219 struct hlist_node *n, *tmp_cls; 220 char cls_id_str[256] = {}; 221 struct rtattr *tb[TCA_MAX + 1]; 222 struct qdisc_util *q; 223 char str[100] = {}; 224 225 hlist_for_each_safe(n, tmp_cls, root_list) { 226 struct hlist_node *c, *tmp_chld; 227 struct hlist_head children = {}; 228 struct graph_node *cls = container_of(n, struct graph_node, 229 hlist); 230 231 hlist_for_each_safe(c, tmp_chld, &cls_list) { 232 struct graph_node *child = container_of(c, 233 struct graph_node, hlist); 234 235 if (cls->id == child->parent_id) { 236 hlist_del(c); 237 hlist_add_head(c, &children); 238 cls->nodes_count++; 239 child->parent_node = cls; 240 } 241 } 242 243 graph_indent(buf, cls, 0, 0); 244 245 print_tc_classid(cls_id_str, sizeof(cls_id_str), cls->id); 246 sprintf(str, "+---(%s)", cls_id_str); 247 strcat(buf, str); 248 249 parse_rtattr(tb, TCA_MAX, (struct rtattr *)cls->data, 250 cls->data_len); 251 252 if (tb[TCA_KIND] == NULL) { 253 strcat(buf, " [unknown qdisc kind] "); 254 } else { 255 const char *kind = rta_getattr_str(tb[TCA_KIND]); 256 257 sprintf(str, " %s ", kind); 258 strcat(buf, str); 259 fprintf(fp, "%s", buf); 260 buf[0] = '\0'; 261 262 q = get_qdisc_kind(kind); 263 if (q && q->print_copt) { 264 q->print_copt(q, fp, tb[TCA_OPTIONS]); 265 } 266 if (q && show_stats) { 267 int cls_indent = strlen(q->id) - 2 + 268 strlen(cls_id_str); 269 struct rtattr *stats = NULL; 270 271 graph_indent(buf, cls, 1, cls_indent); 272 273 if (tb[TCA_STATS] || tb[TCA_STATS2]) { 274 fprintf(fp, "\n"); 275 print_tcstats_attr(fp, tb, buf, &stats); 276 buf[0] = '\0'; 277 } 278 if (cls->hlist.next || cls->nodes_count) { 279 strcat(buf, "\n"); 280 graph_indent(buf, cls, 1, 0); 281 } 282 } 283 } 284 free(cls->data); 285 fprintf(fp, "%s\n", buf); 286 buf[0] = '\0'; 287 288 graph_cls_show(fp, buf, &children, level + 1); 289 if (!cls->hlist.next) { 290 graph_indent(buf, cls, 0, 0); 291 strcat(buf, "\n"); 292 } 293 294 fprintf(fp, "%s", buf); 295 buf[0] = '\0'; 296 free(cls); 297 } 298 } 299 300 int print_class(const struct sockaddr_nl *who, 301 struct nlmsghdr *n, void *arg) 302 { 303 FILE *fp = (FILE *)arg; 304 struct tcmsg *t = NLMSG_DATA(n); 305 int len = n->nlmsg_len; 306 struct rtattr *tb[TCA_MAX + 1]; 307 struct qdisc_util *q; 308 char abuf[256]; 309 310 if (n->nlmsg_type != RTM_NEWTCLASS && n->nlmsg_type != RTM_DELTCLASS) { 311 fprintf(stderr, "Not a class\n"); 312 return 0; 313 } 314 len -= NLMSG_LENGTH(sizeof(*t)); 315 if (len < 0) { 316 fprintf(stderr, "Wrong len %d\n", len); 317 return -1; 318 } 319 320 if (show_graph) { 321 graph_node_add(t->tcm_parent, t->tcm_handle, TCA_RTA(t), len); 322 return 0; 323 } 324 325 if (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc)) 326 return 0; 327 328 if (filter_classid && t->tcm_handle != filter_classid) 329 return 0; 330 331 parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); 332 333 if (tb[TCA_KIND] == NULL) { 334 fprintf(stderr, "print_class: NULL kind\n"); 335 return -1; 336 } 337 338 if (n->nlmsg_type == RTM_DELTCLASS) 339 fprintf(fp, "deleted "); 340 341 abuf[0] = 0; 342 if (t->tcm_handle) { 343 if (filter_qdisc) 344 print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_handle)); 345 else 346 print_tc_classid(abuf, sizeof(abuf), t->tcm_handle); 347 } 348 fprintf(fp, "class %s %s ", rta_getattr_str(tb[TCA_KIND]), abuf); 349 350 if (filter_ifindex == 0) 351 fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); 352 353 if (t->tcm_parent == TC_H_ROOT) 354 fprintf(fp, "root "); 355 else { 356 if (filter_qdisc) 357 print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_parent)); 358 else 359 print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); 360 fprintf(fp, "parent %s ", abuf); 361 } 362 if (t->tcm_info) 363 fprintf(fp, "leaf %x: ", t->tcm_info>>16); 364 q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); 365 if (tb[TCA_OPTIONS]) { 366 if (q && q->print_copt) 367 q->print_copt(q, fp, tb[TCA_OPTIONS]); 368 else 369 fprintf(fp, "[cannot parse class parameters]"); 370 } 371 fprintf(fp, "\n"); 372 if (show_stats) { 373 struct rtattr *xstats = NULL; 374 375 if (tb[TCA_STATS] || tb[TCA_STATS2]) { 376 print_tcstats_attr(fp, tb, " ", &xstats); 377 fprintf(fp, "\n"); 378 } 379 if (q && (xstats || tb[TCA_XSTATS]) && q->print_xstats) { 380 q->print_xstats(q, fp, xstats ? : tb[TCA_XSTATS]); 381 fprintf(fp, "\n"); 382 } 383 } 384 fflush(fp); 385 return 0; 386 } 387 388 389 static int tc_class_list(int argc, char **argv) 390 { 391 struct tcmsg t = { .tcm_family = AF_UNSPEC }; 392 char d[16] = {}; 393 char buf[1024] = {0}; 394 395 filter_qdisc = 0; 396 filter_classid = 0; 397 398 while (argc > 0) { 399 if (strcmp(*argv, "dev") == 0) { 400 NEXT_ARG(); 401 if (d[0]) 402 duparg("dev", *argv); 403 strncpy(d, *argv, sizeof(d)-1); 404 } else if (strcmp(*argv, "qdisc") == 0) { 405 NEXT_ARG(); 406 if (filter_qdisc) 407 duparg("qdisc", *argv); 408 if (get_qdisc_handle(&filter_qdisc, *argv)) 409 invarg("invalid qdisc ID", *argv); 410 } else if (strcmp(*argv, "classid") == 0) { 411 NEXT_ARG(); 412 if (filter_classid) 413 duparg("classid", *argv); 414 if (get_tc_classid(&filter_classid, *argv)) 415 invarg("invalid class ID", *argv); 416 } else if (strcmp(*argv, "root") == 0) { 417 if (t.tcm_parent) { 418 fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); 419 return -1; 420 } 421 t.tcm_parent = TC_H_ROOT; 422 } else if (strcmp(*argv, "parent") == 0) { 423 __u32 handle; 424 425 if (t.tcm_parent) 426 duparg("parent", *argv); 427 NEXT_ARG(); 428 if (get_tc_classid(&handle, *argv)) 429 invarg("invalid parent ID", *argv); 430 t.tcm_parent = handle; 431 } else if (matches(*argv, "help") == 0) { 432 usage(); 433 } else { 434 fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv); 435 return -1; 436 } 437 438 argc--; argv++; 439 } 440 441 ll_init_map(&rth); 442 443 if (d[0]) { 444 if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { 445 fprintf(stderr, "Cannot find device \"%s\"\n", d); 446 return 1; 447 } 448 filter_ifindex = t.tcm_ifindex; 449 } 450 451 if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) { 452 perror("Cannot send dump request"); 453 return 1; 454 } 455 456 if (rtnl_dump_filter(&rth, print_class, stdout) < 0) { 457 fprintf(stderr, "Dump terminated\n"); 458 return 1; 459 } 460 461 if (show_graph) 462 graph_cls_show(stdout, &buf[0], &root_cls_list, 0); 463 464 return 0; 465 } 466 467 int do_class(int argc, char **argv) 468 { 469 if (argc < 1) 470 return tc_class_list(0, NULL); 471 if (matches(*argv, "add") == 0) 472 return tc_class_modify(RTM_NEWTCLASS, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); 473 if (matches(*argv, "change") == 0) 474 return tc_class_modify(RTM_NEWTCLASS, 0, argc-1, argv+1); 475 if (matches(*argv, "replace") == 0) 476 return tc_class_modify(RTM_NEWTCLASS, NLM_F_CREATE, argc-1, argv+1); 477 if (matches(*argv, "delete") == 0) 478 return tc_class_modify(RTM_DELTCLASS, 0, argc-1, argv+1); 479 #if 0 480 if (matches(*argv, "get") == 0) 481 return tc_class_get(RTM_GETTCLASS, 0, argc-1, argv+1); 482 #endif 483 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 484 || matches(*argv, "lst") == 0) 485 return tc_class_list(argc-1, argv+1); 486 if (matches(*argv, "help") == 0) { 487 usage(); 488 return 0; 489 } 490 fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv); 491 return -1; 492 } 493
