tc/q_fq_codel.c

   1 /*
   2  * Fair Queue Codel
   3  *
   4  *  Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The names of the authors may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * Alternatively, provided that this notice is retained in full, this
  19  * software may be distributed under the terms of the GNU General
  20  * Public License ("GPL") version 2, in which case the provisions of the
  21  * GPL apply INSTEAD OF those given above.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  29  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  34  * DAMAGE.
  35  *
  36  */
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <fcntl.h>
  42 #include <sys/socket.h>
  43 #include <netinet/in.h>
  44 #include <arpa/inet.h>
  45 #include <string.h>
  46
  47 #include "utils.h"
  48 #include "tc_util.h"
  49
  50 static void explain(void)
  51 {
  52         fprintf(stderr,
  53                 "Usage: ... fq_codel    [ limit PACKETS ] [ flows NUMBER ]\n"
  54                                         "[ memory_limit BYTES ]\n"
  55                                         "[ target TIME ] [ interval TIME ]\n"
  56                                         "[ quantum BYTES ] [ [no]ecn ]\n"
  57                                         "[ ce_threshold TIME ]\n");
  58 }
  59
  60 static int fq_codel_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  61                               struct nlmsghdr *n, const char *dev)
  62 {
  63         unsigned int limit = 0;
  64         unsigned int flows = 0;
  65         unsigned int target = 0;
  66         unsigned int interval = 0;
  67         unsigned int quantum = 0;
  68         unsigned int ce_threshold = ~0U;
  69         unsigned int memory = ~0U;
  70         int ecn = -1;
  71         struct rtattr *tail;
  72
  73         while (argc > 0) {
  74                 if (strcmp(*argv, "limit") == 0) {
  75                         NEXT_ARG();
  76                         if (get_unsigned(&limit, *argv, 0)) {
  77                                 fprintf(stderr, "Illegal \"limit\"\n");
  78                                 return -1;
  79                         }
  80                 } else if (strcmp(*argv, "flows") == 0) {
  81                         NEXT_ARG();
  82                         if (get_unsigned(&flows, *argv, 0)) {
  83                                 fprintf(stderr, "Illegal \"flows\"\n");
  84                                 return -1;
  85                         }
  86                 } else if (strcmp(*argv, "quantum") == 0) {
  87                         NEXT_ARG();
  88                         if (get_unsigned(&quantum, *argv, 0)) {
  89                                 fprintf(stderr, "Illegal \"quantum\"\n");
  90                                 return -1;
  91                         }
  92                 } else if (strcmp(*argv, "target") == 0) {
  93                         NEXT_ARG();
  94                         if (get_time(&target, *argv)) {
  95                                 fprintf(stderr, "Illegal \"target\"\n");
  96                                 return -1;
  97                         }
  98                 } else if (strcmp(*argv, "ce_threshold") == 0) {
  99                         NEXT_ARG();
 100                         if (get_time(&ce_threshold, *argv)) {
 101                                 fprintf(stderr, "Illegal \"ce_threshold\"\n");
 102                                 return -1;
 103                         }
 104                 } else if (strcmp(*argv, "memory_limit") == 0) {
 105                         NEXT_ARG();
 106                         if (get_size(&memory, *argv)) {
 107                                 fprintf(stderr, "Illegal \"memory_limit\"\n");
 108                                 return -1;
 109                         }
 110                 } else if (strcmp(*argv, "interval") == 0) {
 111                         NEXT_ARG();
 112                         if (get_time(&interval, *argv)) {
 113                                 fprintf(stderr, "Illegal \"interval\"\n");
 114                                 return -1;
 115                         }
 116                 } else if (strcmp(*argv, "ecn") == 0) {
 117                         ecn = 1;
 118                 } else if (strcmp(*argv, "noecn") == 0) {
 119                         ecn = 0;
 120                 } else if (strcmp(*argv, "help") == 0) {
 121                         explain();
 122                         return -1;
 123                 } else {
 124                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 125                         explain();
 126                         return -1;
 127                 }
 128                 argc--; argv++;
 129         }
 130
 131         tail = addattr_nest(n, 1024, TCA_OPTIONS);
 132         if (limit)
 133                 addattr_l(n, 1024, TCA_FQ_CODEL_LIMIT, &limit, sizeof(limit));
 134         if (flows)
 135                 addattr_l(n, 1024, TCA_FQ_CODEL_FLOWS, &flows, sizeof(flows));
 136         if (quantum)
 137                 addattr_l(n, 1024, TCA_FQ_CODEL_QUANTUM, &quantum, sizeof(quantum));
 138         if (interval)
 139                 addattr_l(n, 1024, TCA_FQ_CODEL_INTERVAL, &interval, sizeof(interval));
 140         if (target)
 141                 addattr_l(n, 1024, TCA_FQ_CODEL_TARGET, &target, sizeof(target));
 142         if (ecn != -1)
 143                 addattr_l(n, 1024, TCA_FQ_CODEL_ECN, &ecn, sizeof(ecn));
 144         if (ce_threshold != ~0U)
 145                 addattr_l(n, 1024, TCA_FQ_CODEL_CE_THRESHOLD,
 146                           &ce_threshold, sizeof(ce_threshold));
 147         if (memory != ~0U)
 148                 addattr_l(n, 1024, TCA_FQ_CODEL_MEMORY_LIMIT,
 149                           &memory, sizeof(memory));
 150
 151         addattr_nest_end(n, tail);
 152         return 0;
 153 }
 154
 155 static int fq_codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 156 {
 157         struct rtattr *tb[TCA_FQ_CODEL_MAX + 1];
 158         unsigned int limit;
 159         unsigned int flows;
 160         unsigned int interval;
 161         unsigned int target;
 162         unsigned int ecn;
 163         unsigned int quantum;
 164         unsigned int ce_threshold;
 165         unsigned int memory_limit;
 166
 167         SPRINT_BUF(b1);
 168
 169         if (opt == NULL)
 170                 return 0;
 171
 172         parse_rtattr_nested(tb, TCA_FQ_CODEL_MAX, opt);
 173
 174         if (tb[TCA_FQ_CODEL_LIMIT] &&
 175             RTA_PAYLOAD(tb[TCA_FQ_CODEL_LIMIT]) >= sizeof(__u32)) {
 176                 limit = rta_getattr_u32(tb[TCA_FQ_CODEL_LIMIT]);
 177                 print_uint(PRINT_ANY, "limit", "limit %up ", limit);
 178         }
 179         if (tb[TCA_FQ_CODEL_FLOWS] &&
 180             RTA_PAYLOAD(tb[TCA_FQ_CODEL_FLOWS]) >= sizeof(__u32)) {
 181                 flows = rta_getattr_u32(tb[TCA_FQ_CODEL_FLOWS]);
 182                 print_uint(PRINT_ANY, "flows", "flows %u ", flows);
 183         }
 184         if (tb[TCA_FQ_CODEL_QUANTUM] &&
 185             RTA_PAYLOAD(tb[TCA_FQ_CODEL_QUANTUM]) >= sizeof(__u32)) {
 186                 quantum = rta_getattr_u32(tb[TCA_FQ_CODEL_QUANTUM]);
 187                 print_uint(PRINT_ANY, "quantum", "quantum %u ", quantum);
 188         }
 189         if (tb[TCA_FQ_CODEL_TARGET] &&
 190             RTA_PAYLOAD(tb[TCA_FQ_CODEL_TARGET]) >= sizeof(__u32)) {
 191                 target = rta_getattr_u32(tb[TCA_FQ_CODEL_TARGET]);
 192                 print_uint(PRINT_JSON, "target", NULL, target);
 193                 print_string(PRINT_FP, NULL, "target %s ",
 194                              sprint_time(target, b1));
 195         }
 196         if (tb[TCA_FQ_CODEL_CE_THRESHOLD] &&
 197             RTA_PAYLOAD(tb[TCA_FQ_CODEL_CE_THRESHOLD]) >= sizeof(__u32)) {
 198                 ce_threshold = rta_getattr_u32(tb[TCA_FQ_CODEL_CE_THRESHOLD]);
 199                 print_uint(PRINT_JSON, "ce_threshold", NULL, ce_threshold);
 200                 print_string(PRINT_FP, NULL, "ce_threshold %s ",
 201                              sprint_time(ce_threshold, b1));
 202         }
 203         if (tb[TCA_FQ_CODEL_INTERVAL] &&
 204             RTA_PAYLOAD(tb[TCA_FQ_CODEL_INTERVAL]) >= sizeof(__u32)) {
 205                 interval = rta_getattr_u32(tb[TCA_FQ_CODEL_INTERVAL]);
 206                 print_uint(PRINT_JSON, "interval", NULL, interval);
 207                 print_string(PRINT_FP, NULL, "interval %s ",
 208                              sprint_time(interval, b1));
 209         }
 210         if (tb[TCA_FQ_CODEL_MEMORY_LIMIT] &&
 211             RTA_PAYLOAD(tb[TCA_FQ_CODEL_MEMORY_LIMIT]) >= sizeof(__u32)) {
 212                 memory_limit = rta_getattr_u32(tb[TCA_FQ_CODEL_MEMORY_LIMIT]);
 213                 print_uint(PRINT_JSON, "memory_limit", NULL, memory_limit);
 214                 print_string(PRINT_FP, NULL, "memory_limit %s ",
 215                              sprint_size(memory_limit, b1));
 216         }
 217         if (tb[TCA_FQ_CODEL_ECN] &&
 218             RTA_PAYLOAD(tb[TCA_FQ_CODEL_ECN]) >= sizeof(__u32)) {
 219                 ecn = rta_getattr_u32(tb[TCA_FQ_CODEL_ECN]);
 220                 if (ecn)
 221                         print_bool(PRINT_ANY, "ecn", "ecn ", true);
 222         }
 223
 224         return 0;
 225 }
 226
 227 static int fq_codel_print_xstats(struct qdisc_util *qu, FILE *f,
 228                                  struct rtattr *xstats)
 229 {
 230         struct tc_fq_codel_xstats _st = {}, *st;
 231
 232         SPRINT_BUF(b1);
 233
 234         if (xstats == NULL)
 235                 return 0;
 236
 237         st = RTA_DATA(xstats);
 238         if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
 239                 memcpy(&_st, st, RTA_PAYLOAD(xstats));
 240                 st = &_st;
 241         }
 242         if (st->type == TCA_FQ_CODEL_XSTATS_QDISC) {
 243                 print_uint(PRINT_ANY, "maxpacket", "  maxpacket %u",
 244                         st->qdisc_stats.maxpacket);
 245                 print_uint(PRINT_ANY, "drop_overlimit", " drop_overlimit %u",
 246                         st->qdisc_stats.drop_overlimit);
 247                 print_uint(PRINT_ANY, "new_flow_count", " new_flow_count %u",
 248                         st->qdisc_stats.new_flow_count);
 249                 print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u",
 250                         st->qdisc_stats.ecn_mark);
 251                 if (st->qdisc_stats.ce_mark)
 252                         print_uint(PRINT_ANY, "ce_mark", " ce_mark %u",
 253                                 st->qdisc_stats.ce_mark);
 254                 if (st->qdisc_stats.memory_usage)
 255                         print_uint(PRINT_ANY, "memory_used", " memory_used %u",
 256                                 st->qdisc_stats.memory_usage);
 257                 if (st->qdisc_stats.drop_overmemory)
 258                         print_uint(PRINT_ANY, "drop_overmemory", " drop_overmemory %u",
 259                                 st->qdisc_stats.drop_overmemory);
 260                 print_uint(PRINT_ANY, "new_flows_len", "\n  new_flows_len %u",
 261                         st->qdisc_stats.new_flows_len);
 262                 print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u",
 263                         st->qdisc_stats.old_flows_len);
 264         }
 265         if (st->type == TCA_FQ_CODEL_XSTATS_CLASS) {
 266                 print_uint(PRINT_ANY, "deficit", "  deficit %u",
 267                         st->class_stats.deficit);
 268                 print_uint(PRINT_ANY, "count", " count %u",
 269                         st->class_stats.count);
 270                 print_uint(PRINT_ANY, "lastcount", " lastcount %u",
 271                         st->class_stats.lastcount);
 272                 print_uint(PRINT_JSON, "ldelay", NULL,
 273                         st->class_stats.ldelay);
 274                 print_string(PRINT_FP, NULL, " ldelay %s",
 275                         sprint_time(st->class_stats.ldelay, b1));
 276                 if (st->class_stats.dropping) {
 277                         print_bool(PRINT_ANY, "dropping", " dropping", true);
 278                         print_int(PRINT_JSON, "drop_next", NULL,
 279                                   st->class_stats.drop_next);
 280                         if (st->class_stats.drop_next < 0)
 281                                 print_string(PRINT_FP, NULL, " drop_next -%s",
 282                                         sprint_time(-st->class_stats.drop_next, b1));
 283                         else {
 284                                 print_string(PRINT_FP, NULL, " drop_next %s",
 285                                         sprint_time(st->class_stats.drop_next, b1));
 286                         }
 287                 }
 288         }
 289         return 0;
 290
 291 }
 292
 293 struct qdisc_util fq_codel_qdisc_util = {
 294         .id             = "fq_codel",
 295         .parse_qopt     = fq_codel_parse_opt,
 296         .print_qopt     = fq_codel_print_opt,
 297         .print_xstats   = fq_codel_print_xstats,
 298 };