tc/q_fq_pie.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Flow Queue PIE
   4  *
   5  * Copyright (C) 2019 Mohit P. Tahiliani <tahiliani@nitk.edu.in>
   6  * Copyright (C) 2019 Sachin D. Patil <sdp.sachin@gmail.com>
   7  * Copyright (C) 2019 V. Saicharan <vsaicharan1998@gmail.com>
   8  * Copyright (C) 2019 Mohit Bhasi <mohitbhasi1998@gmail.com>
   9  * Copyright (C) 2019 Leslie Monis <lesliemonis@gmail.com>
  10  * Copyright (C) 2019 Gautam Ramakrishnan <gautamramk@gmail.com>
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <fcntl.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <arpa/inet.h>
  20 #include <string.h>
  21
  22 #include "utils.h"
  23 #include "tc_util.h"
  24
  25 static void explain(void)
  26 {
  27         fprintf(stderr,
  28                 "Usage: ... fq_pie [ limit PACKETS ] [ flows NUMBER ]\n"
  29                 "                  [ target TIME ] [ tupdate TIME ]\n"
  30                 "                  [ alpha NUMBER ] [ beta NUMBER ]\n"
  31                 "                  [ quantum BYTES ] [ memory_limit BYTES ]\n"
  32                 "                  [ ecn_prob PERCENTAGE ] [ [no]ecn ]\n"
  33                 "                  [ [no]bytemode ] [ [no_]dq_rate_estimator ]\n");
  34 }
  35
  36 #define ALPHA_MAX 32
  37 #define BETA_MAX 32
  38
  39 static int fq_pie_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  40                             struct nlmsghdr *n, const char *dev)
  41 {
  42         unsigned int limit = 0;
  43         unsigned int flows = 0;
  44         unsigned int target = 0;
  45         unsigned int tupdate = 0;
  46         unsigned int alpha = 0;
  47         unsigned int beta = 0;
  48         unsigned int quantum = 0;
  49         unsigned int memory_limit = 0;
  50         unsigned int ecn_prob = 0;
  51         int ecn = -1;
  52         int bytemode = -1;
  53         int dq_rate_estimator = -1;
  54         struct rtattr *tail;
  55
  56         while (argc > 0) {
  57                 if (strcmp(*argv, "limit") == 0) {
  58                         NEXT_ARG();
  59                         if (get_unsigned(&limit, *argv, 0)) {
  60                                 fprintf(stderr, "Illegal \"limit\"\n");
  61                                 return -1;
  62                         }
  63                 } else if (strcmp(*argv, "flows") == 0) {
  64                         NEXT_ARG();
  65                         if (get_unsigned(&flows, *argv, 0)) {
  66                                 fprintf(stderr, "Illegal \"flows\"\n");
  67                                 return -1;
  68                         }
  69                 } else if (strcmp(*argv, "target") == 0) {
  70                         NEXT_ARG();
  71                         if (get_time(&target, *argv)) {
  72                                 fprintf(stderr, "Illegal \"target\"\n");
  73                                 return -1;
  74                         }
  75                 } else if (strcmp(*argv, "tupdate") == 0) {
  76                         NEXT_ARG();
  77                         if (get_time(&tupdate, *argv)) {
  78                                 fprintf(stderr, "Illegal \"tupdate\"\n");
  79                                 return -1;
  80                         }
  81                 } else if (strcmp(*argv, "alpha") == 0) {
  82                         NEXT_ARG();
  83                         if (get_unsigned(&alpha, *argv, 0) ||
  84                             alpha > ALPHA_MAX) {
  85                                 fprintf(stderr, "Illegal \"alpha\"\n");
  86                                 return -1;
  87                         }
  88                 } else if (strcmp(*argv, "beta") == 0) {
  89                         NEXT_ARG();
  90                         if (get_unsigned(&beta, *argv, 0) ||
  91                             beta > BETA_MAX) {
  92                                 fprintf(stderr, "Illegal \"beta\"\n");
  93                                 return -1;
  94                         }
  95                 } else if (strcmp(*argv, "quantum") == 0) {
  96                         NEXT_ARG();
  97                         if (get_size(&quantum, *argv)) {
  98                                 fprintf(stderr, "Illegal \"quantum\"\n");
  99                                 return -1;
 100                         }
 101                 } else if (strcmp(*argv, "memory_limit") == 0) {
 102                         NEXT_ARG();
 103                         if (get_size(&memory_limit, *argv)) {
 104                                 fprintf(stderr, "Illegal \"memory_limit\"\n");
 105                                 return -1;
 106                         }
 107                 } else if (strcmp(*argv, "ecn_prob") == 0) {
 108                         NEXT_ARG();
 109                         if (get_unsigned(&ecn_prob, *argv, 0) ||
 110                             ecn_prob >= 100) {
 111                                 fprintf(stderr, "Illegal \"ecn_prob\"\n");
 112                                 return -1;
 113                         }
 114                 } else if (strcmp(*argv, "ecn") == 0) {
 115                         ecn = 1;
 116                 } else if (strcmp(*argv, "noecn") == 0) {
 117                         ecn = 0;
 118                 } else if (strcmp(*argv, "bytemode") == 0) {
 119                         bytemode = 1;
 120                 } else if (strcmp(*argv, "nobytemode") == 0) {
 121                         bytemode = 0;
 122                 } else if (strcmp(*argv, "dq_rate_estimator") == 0) {
 123                         dq_rate_estimator = 1;
 124                 } else if (strcmp(*argv, "no_dq_rate_estimator") == 0) {
 125                         dq_rate_estimator = 0;
 126                 } else if (strcmp(*argv, "help") == 0) {
 127                         explain();
 128                         return -1;
 129                 } else {
 130                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 131                         explain();
 132                         return -1;
 133                 }
 134
 135                 argc--;
 136                 argv++;
 137         }
 138
 139         tail = addattr_nest(n, 1024, TCA_OPTIONS | NLA_F_NESTED);
 140         if (limit)
 141                 addattr_l(n, 1024, TCA_FQ_PIE_LIMIT, &limit, sizeof(limit));
 142         if (flows)
 143                 addattr_l(n, 1024, TCA_FQ_PIE_FLOWS, &flows, sizeof(flows));
 144         if (target)
 145                 addattr_l(n, 1024, TCA_FQ_PIE_TARGET, &target, sizeof(target));
 146         if (tupdate)
 147                 addattr_l(n, 1024, TCA_FQ_PIE_TUPDATE, &tupdate,
 148                           sizeof(tupdate));
 149         if (alpha)
 150                 addattr_l(n, 1024, TCA_FQ_PIE_ALPHA, &alpha, sizeof(alpha));
 151         if (beta)
 152                 addattr_l(n, 1024, TCA_FQ_PIE_BETA, &beta, sizeof(beta));
 153         if (quantum)
 154                 addattr_l(n, 1024, TCA_FQ_PIE_QUANTUM, &quantum,
 155                           sizeof(quantum));
 156         if (memory_limit)
 157                 addattr_l(n, 1024, TCA_FQ_PIE_MEMORY_LIMIT, &memory_limit,
 158                           sizeof(memory_limit));
 159         if (ecn_prob)
 160                 addattr_l(n, 1024, TCA_FQ_PIE_ECN_PROB, &ecn_prob,
 161                           sizeof(ecn_prob));
 162         if (ecn != -1)
 163                 addattr_l(n, 1024, TCA_FQ_PIE_ECN, &ecn, sizeof(ecn));
 164         if (bytemode != -1)
 165                 addattr_l(n, 1024, TCA_FQ_PIE_BYTEMODE, &bytemode,
 166                           sizeof(bytemode));
 167         if (dq_rate_estimator != -1)
 168                 addattr_l(n, 1024, TCA_FQ_PIE_DQ_RATE_ESTIMATOR,
 169                           &dq_rate_estimator, sizeof(dq_rate_estimator));
 170         addattr_nest_end(n, tail);
 171
 172         return 0;
 173 }
 174
 175 static int fq_pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 176 {
 177         struct rtattr *tb[TCA_FQ_PIE_MAX + 1];
 178         unsigned int limit = 0;
 179         unsigned int flows = 0;
 180         unsigned int target = 0;
 181         unsigned int tupdate = 0;
 182         unsigned int alpha = 0;
 183         unsigned int beta = 0;
 184         unsigned int quantum = 0;
 185         unsigned int memory_limit = 0;
 186         unsigned int ecn_prob = 0;
 187         int ecn = -1;
 188         int bytemode = -1;
 189         int dq_rate_estimator = -1;
 190
 191         SPRINT_BUF(b1);
 192
 193         if (opt == NULL)
 194                 return 0;
 195
 196         parse_rtattr_nested(tb, TCA_FQ_PIE_MAX, opt);
 197
 198         if (tb[TCA_FQ_PIE_LIMIT] &&
 199             RTA_PAYLOAD(tb[TCA_FQ_PIE_LIMIT]) >= sizeof(__u32)) {
 200                 limit = rta_getattr_u32(tb[TCA_FQ_PIE_LIMIT]);
 201                 print_uint(PRINT_ANY, "limit", "limit %up ", limit);
 202         }
 203         if (tb[TCA_FQ_PIE_FLOWS] &&
 204             RTA_PAYLOAD(tb[TCA_FQ_PIE_FLOWS]) >= sizeof(__u32)) {
 205                 flows = rta_getattr_u32(tb[TCA_FQ_PIE_FLOWS]);
 206                 print_uint(PRINT_ANY, "flows", "flows %u ", flows);
 207         }
 208         if (tb[TCA_FQ_PIE_TARGET] &&
 209             RTA_PAYLOAD(tb[TCA_FQ_PIE_TARGET]) >= sizeof(__u32)) {
 210                 target = rta_getattr_u32(tb[TCA_FQ_PIE_TARGET]);
 211                 print_uint(PRINT_JSON, "target", NULL, target);
 212                 print_string(PRINT_FP, NULL, "target %s ",
 213                              sprint_time(target, b1));
 214         }
 215         if (tb[TCA_FQ_PIE_TUPDATE] &&
 216             RTA_PAYLOAD(tb[TCA_FQ_PIE_TUPDATE]) >= sizeof(__u32)) {
 217                 tupdate = rta_getattr_u32(tb[TCA_FQ_PIE_TUPDATE]);
 218                 print_uint(PRINT_JSON, "tupdate", NULL, tupdate);
 219                 print_string(PRINT_FP, NULL, "tupdate %s ",
 220                              sprint_time(tupdate, b1));
 221         }
 222         if (tb[TCA_FQ_PIE_ALPHA] &&
 223             RTA_PAYLOAD(tb[TCA_FQ_PIE_ALPHA]) >= sizeof(__u32)) {
 224                 alpha = rta_getattr_u32(tb[TCA_FQ_PIE_ALPHA]);
 225                 print_uint(PRINT_ANY, "alpha", "alpha %u ", alpha);
 226         }
 227         if (tb[TCA_FQ_PIE_BETA] &&
 228             RTA_PAYLOAD(tb[TCA_FQ_PIE_BETA]) >= sizeof(__u32)) {
 229                 beta = rta_getattr_u32(tb[TCA_FQ_PIE_BETA]);
 230                 print_uint(PRINT_ANY, "beta", "beta %u ", beta);
 231         }
 232         if (tb[TCA_FQ_PIE_QUANTUM] &&
 233             RTA_PAYLOAD(tb[TCA_FQ_PIE_QUANTUM]) >= sizeof(__u32)) {
 234                 quantum = rta_getattr_u32(tb[TCA_FQ_PIE_QUANTUM]);
 235                 print_uint(PRINT_JSON, "quantum", NULL, quantum);
 236                 print_string(PRINT_FP, NULL, "quantum %s ",
 237                              sprint_size(quantum, b1));
 238         }
 239         if (tb[TCA_FQ_PIE_MEMORY_LIMIT] &&
 240             RTA_PAYLOAD(tb[TCA_FQ_PIE_MEMORY_LIMIT]) >= sizeof(__u32)) {
 241                 memory_limit = rta_getattr_u32(tb[TCA_FQ_PIE_MEMORY_LIMIT]);
 242                 print_uint(PRINT_JSON, "memory_limit", NULL, memory_limit);
 243                 print_string(PRINT_FP, NULL, "memory_limit %s ",
 244                              sprint_size(memory_limit, b1));
 245         }
 246         if (tb[TCA_FQ_PIE_ECN_PROB] &&
 247             RTA_PAYLOAD(tb[TCA_FQ_PIE_ECN_PROB]) >= sizeof(__u32)) {
 248                 ecn_prob = rta_getattr_u32(tb[TCA_FQ_PIE_ECN_PROB]);
 249                 print_uint(PRINT_ANY, "ecn_prob", "ecn_prob %u ", ecn_prob);
 250         }
 251         if (tb[TCA_FQ_PIE_ECN] &&
 252             RTA_PAYLOAD(tb[TCA_FQ_PIE_ECN]) >= sizeof(__u32)) {
 253                 ecn = rta_getattr_u32(tb[TCA_FQ_PIE_ECN]);
 254                 if (ecn)
 255                         print_bool(PRINT_ANY, "ecn", "ecn ", true);
 256         }
 257         if (tb[TCA_FQ_PIE_BYTEMODE] &&
 258             RTA_PAYLOAD(tb[TCA_FQ_PIE_BYTEMODE]) >= sizeof(__u32)) {
 259                 bytemode = rta_getattr_u32(tb[TCA_FQ_PIE_BYTEMODE]);
 260                 if (bytemode)
 261                         print_bool(PRINT_ANY, "bytemode", "bytemode ", true);
 262         }
 263         if (tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR] &&
 264             RTA_PAYLOAD(tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR]) >= sizeof(__u32)) {
 265                 dq_rate_estimator =
 266                         rta_getattr_u32(tb[TCA_FQ_PIE_DQ_RATE_ESTIMATOR]);
 267                 if (dq_rate_estimator)
 268                         print_bool(PRINT_ANY, "dq_rate_estimator",
 269                                    "dq_rate_estimator ", true);
 270         }
 271
 272         return 0;
 273 }
 274
 275 static int fq_pie_print_xstats(struct qdisc_util *qu, FILE *f,
 276                                struct rtattr *xstats)
 277 {
 278         struct tc_fq_pie_xstats _st = {}, *st;
 279
 280         if (xstats == NULL)
 281                 return 0;
 282
 283         st = RTA_DATA(xstats);
 284         if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
 285                 memcpy(&_st, st, RTA_PAYLOAD(xstats));
 286                 st = &_st;
 287         }
 288
 289         print_uint(PRINT_ANY, "pkts_in", "  pkts_in %u",
 290                    st->packets_in);
 291         print_uint(PRINT_ANY, "overlimit", " overlimit %u",
 292                    st->overlimit);
 293         print_uint(PRINT_ANY, "overmemory", " overmemory %u",
 294                    st->overmemory);
 295         print_uint(PRINT_ANY, "dropped", " dropped %u",
 296                    st->dropped);
 297         print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u",
 298                    st->ecn_mark);
 299         print_nl();
 300         print_uint(PRINT_ANY, "new_flow_count", "  new_flow_count %u",
 301                    st->new_flow_count);
 302         print_uint(PRINT_ANY, "new_flows_len", " new_flows_len %u",
 303                    st->new_flows_len);
 304         print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u",
 305                    st->old_flows_len);
 306         print_uint(PRINT_ANY, "memory_used", " memory_used %u",
 307                    st->memory_usage);
 308
 309         return 0;
 310
 311 }
 312
 313 struct qdisc_util fq_pie_qdisc_util = {
 314         .id             = "fq_pie",
 315         .parse_qopt     = fq_pie_parse_opt,
 316         .print_qopt     = fq_pie_print_opt,
 317         .print_xstats   = fq_pie_print_xstats,
 318 };