1 /* 2 * tc_qdisc.c "tc qdisc". 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 * J Hadi Salim: Extension to ingress 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 #include <malloc.h> 24 25 #include "utils.h" 26 #include "tc_util.h" 27 #include "tc_common.h" 28 29 static int usage(void); 30 31 static int usage(void) 32 { 33 fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n"); 34 fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | parent CLASSID ]\n"); 35 fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); 36 fprintf(stderr, " [ stab [ help | STAB_OPTIONS] ]\n"); 37 fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); 38 fprintf(stderr, "\n"); 39 fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\n"); 40 fprintf(stderr, "Where:\n"); 41 fprintf(stderr, "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"); 42 fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"); 43 fprintf(stderr, "STAB_OPTIONS := ... try tc qdisc add stab help\n"); 44 return -1; 45 } 46 47 int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv) 48 { 49 struct qdisc_util *q = NULL; 50 struct tc_estimator est; 51 struct { 52 struct tc_sizespec szopts; 53 __u16 *data; 54 } stab; 55 char d[16]; 56 char k[16]; 57 struct { 58 struct nlmsghdr n; 59 struct tcmsg t; 60 char buf[TCA_BUF_MAX]; 61 } req; 62 63 memset(&req, 0, sizeof(req)); 64 memset(&stab, 0, sizeof(stab)); 65 memset(&est, 0, sizeof(est)); 66 memset(&d, 0, sizeof(d)); 67 memset(&k, 0, sizeof(k)); 68 69 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); 70 req.n.nlmsg_flags = NLM_F_REQUEST|flags; 71 req.n.nlmsg_type = cmd; 72 req.t.tcm_family = AF_UNSPEC; 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, "handle") == 0) { 81 __u32 handle; 82 if (req.t.tcm_handle) 83 duparg("handle", *argv); 84 NEXT_ARG(); 85 if (get_qdisc_handle(&handle, *argv)) 86 invarg(*argv, "invalid qdisc ID"); 87 req.t.tcm_handle = handle; 88 } else if (strcmp(*argv, "root") == 0) { 89 if (req.t.tcm_parent) { 90 fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); 91 return -1; 92 } 93 req.t.tcm_parent = TC_H_ROOT; 94 #ifdef TC_H_INGRESS 95 } else if (strcmp(*argv, "ingress") == 0) { 96 if (req.t.tcm_parent) { 97 fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n"); 98 return -1; 99 } 100 req.t.tcm_parent = TC_H_INGRESS; 101 strncpy(k, "ingress", sizeof(k)-1); 102 q = get_qdisc_kind(k); 103 req.t.tcm_handle = 0xffff0000; 104 105 argc--; argv++; 106 break; 107 #endif 108 } else if (strcmp(*argv, "parent") == 0) { 109 __u32 handle; 110 NEXT_ARG(); 111 if (req.t.tcm_parent) 112 duparg("parent", *argv); 113 if (get_tc_classid(&handle, *argv)) 114 invarg(*argv, "invalid parent ID"); 115 req.t.tcm_parent = handle; 116 } else if (matches(*argv, "estimator") == 0) { 117 if (parse_estimator(&argc, &argv, &est)) 118 return -1; 119 } else if (matches(*argv, "stab") == 0) { 120 if (parse_size_table(&argc, &argv, &stab.szopts) < 0) 121 return -1; 122 continue; 123 } else if (matches(*argv, "help") == 0) { 124 usage(); 125 } else { 126 strncpy(k, *argv, sizeof(k)-1); 127 128 q = get_qdisc_kind(k); 129 argc--; argv++; 130 break; 131 } 132 argc--; argv++; 133 } 134 135 if (k[0]) 136 addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); 137 if (est.ewma_log) 138 addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); 139 140 if (q) { 141 if (!q->parse_qopt) { 142 fprintf(stderr, "qdisc '%s' does not support option parsing\n", k); 143 return -1; 144 } 145 if (q->parse_qopt(q, argc, argv, &req.n)) 146 return 1; 147 } else { 148 if (argc) { 149 if (matches(*argv, "help") == 0) 150 usage(); 151 152 fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv); 153 return -1; 154 } 155 } 156 157 if (check_size_table_opts(&stab.szopts)) { 158 struct rtattr *tail; 159 160 if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) { 161 fprintf(stderr, "failed to calculate size table.\n"); 162 return -1; 163 } 164 165 tail = NLMSG_TAIL(&req.n); 166 addattr_l(&req.n, sizeof(req), TCA_STAB, NULL, 0); 167 addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts, 168 sizeof(stab.szopts)); 169 if (stab.data) 170 addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data, 171 stab.szopts.tsize * sizeof(__u16)); 172 tail->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)tail; 173 if (stab.data) 174 free(stab.data); 175 } 176 177 if (d[0]) { 178 int idx; 179 180 ll_init_map(&rth); 181 182 if ((idx = ll_name_to_index(d)) == 0) { 183 fprintf(stderr, "Cannot find device \"%s\"\n", d); 184 return 1; 185 } 186 req.t.tcm_ifindex = idx; 187 } 188 189 if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) 190 return 2; 191 192 return 0; 193 } 194 195 static int filter_ifindex; 196 197 int print_qdisc(const struct sockaddr_nl *who, 198 struct nlmsghdr *n, 199 void *arg) 200 { 201 FILE *fp = (FILE*)arg; 202 struct tcmsg *t = NLMSG_DATA(n); 203 int len = n->nlmsg_len; 204 struct rtattr * tb[TCA_MAX+1]; 205 struct qdisc_util *q; 206 char abuf[256]; 207 208 if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) { 209 fprintf(stderr, "Not a qdisc\n"); 210 return 0; 211 } 212 len -= NLMSG_LENGTH(sizeof(*t)); 213 if (len < 0) { 214 fprintf(stderr, "Wrong len %d\n", len); 215 return -1; 216 } 217 218 if (filter_ifindex && filter_ifindex != t->tcm_ifindex) 219 return 0; 220 221 memset(tb, 0, sizeof(tb)); 222 parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); 223 224 if (tb[TCA_KIND] == NULL) { 225 fprintf(stderr, "print_qdisc: NULL kind\n"); 226 return -1; 227 } 228 229 if (n->nlmsg_type == RTM_DELQDISC) 230 fprintf(fp, "deleted "); 231 232 fprintf(fp, "qdisc %s %x: ", rta_getattr_str(tb[TCA_KIND]), t->tcm_handle>>16); 233 if (filter_ifindex == 0) 234 fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); 235 if (t->tcm_parent == TC_H_ROOT) 236 fprintf(fp, "root "); 237 else if (t->tcm_parent) { 238 print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); 239 fprintf(fp, "parent %s ", abuf); 240 } 241 if (t->tcm_info != 1) { 242 fprintf(fp, "refcnt %d ", t->tcm_info); 243 } 244 /* pfifo_fast is generic enough to warrant the hardcoding --JHS */ 245 246 if (0 == strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND]))) 247 q = get_qdisc_kind("prio"); 248 else 249 q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); 250 251 if (tb[TCA_OPTIONS]) { 252 if (q) 253 q->print_qopt(q, fp, tb[TCA_OPTIONS]); 254 else 255 fprintf(fp, "[cannot parse qdisc parameters]"); 256 } 257 fprintf(fp, "\n"); 258 if (show_details && tb[TCA_STAB]) { 259 print_size_table(fp, " ", tb[TCA_STAB]); 260 fprintf(fp, "\n"); 261 } 262 if (show_stats) { 263 struct rtattr *xstats = NULL; 264 265 if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) { 266 print_tcstats_attr(fp, tb, " ", &xstats); 267 fprintf(fp, "\n"); 268 } 269 270 if (q && xstats && q->print_xstats) { 271 q->print_xstats(q, fp, xstats); 272 fprintf(fp, "\n"); 273 } 274 } 275 fflush(fp); 276 return 0; 277 } 278 279 280 int tc_qdisc_list(int argc, char **argv) 281 { 282 struct tcmsg t; 283 char d[16]; 284 285 memset(&t, 0, sizeof(t)); 286 t.tcm_family = AF_UNSPEC; 287 memset(&d, 0, sizeof(d)); 288 289 while (argc > 0) { 290 if (strcmp(*argv, "dev") == 0) { 291 NEXT_ARG(); 292 strncpy(d, *argv, sizeof(d)-1); 293 #ifdef TC_H_INGRESS 294 } else if (strcmp(*argv, "ingress") == 0) { 295 if (t.tcm_parent) { 296 fprintf(stderr, "Duplicate parent ID\n"); 297 usage(); 298 } 299 t.tcm_parent = TC_H_INGRESS; 300 #endif 301 } else if (matches(*argv, "help") == 0) { 302 usage(); 303 } else { 304 fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); 305 return -1; 306 } 307 308 argc--; argv++; 309 } 310 311 ll_init_map(&rth); 312 313 if (d[0]) { 314 if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { 315 fprintf(stderr, "Cannot find device \"%s\"\n", d); 316 return 1; 317 } 318 filter_ifindex = t.tcm_ifindex; 319 } 320 321 if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { 322 perror("Cannot send dump request"); 323 return 1; 324 } 325 326 if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) { 327 fprintf(stderr, "Dump terminated\n"); 328 return 1; 329 } 330 331 return 0; 332 } 333 334 int do_qdisc(int argc, char **argv) 335 { 336 if (argc < 1) 337 return tc_qdisc_list(0, NULL); 338 if (matches(*argv, "add") == 0) 339 return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); 340 if (matches(*argv, "change") == 0) 341 return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1); 342 if (matches(*argv, "replace") == 0) 343 return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); 344 if (matches(*argv, "link") == 0) 345 return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1); 346 if (matches(*argv, "delete") == 0) 347 return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1); 348 #if 0 349 if (matches(*argv, "get") == 0) 350 return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1); 351 #endif 352 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 353 || matches(*argv, "lst") == 0) 354 return tc_qdisc_list(argc-1, argv+1); 355 if (matches(*argv, "help") == 0) { 356 usage(); 357 return 0; 358 } 359 fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv); 360 return -1; 361 } 362
