tc/tc_util.c

   1 /*
   2  * tc_util.c            Misc TC utility functions.
   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@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
  27 #ifndef DESTDIR
  28 #define DESTDIR "/usr/"
  29 #endif
  30
  31 const char *get_tc_lib(void)
  32 {
  33         const char *lib_dir;
  34
  35         lib_dir = getenv("TC_LIB_DIR");
  36         if (!lib_dir)
  37                 lib_dir = DESTDIR "/lib/tc";
  38
  39         return lib_dir;
  40 }
  41
  42 int get_qdisc_handle(__u32 *h, const char *str)
  43 {
  44         __u32 maj;
  45         char *p;
  46
  47         maj = TC_H_UNSPEC;
  48         if (strcmp(str, "none") == 0)
  49                 goto ok;
  50         maj = strtoul(str, &p, 16);
  51         if (p == str)
  52                 return -1;
  53         maj <<= 16;
  54         if (*p != ':' && *p!=0)
  55                 return -1;
  56 ok:
  57         *h = maj;
  58         return 0;
  59 }
  60
  61 int get_tc_classid(__u32 *h, const char *str)
  62 {
  63         __u32 maj, min;
  64         char *p;
  65
  66         maj = TC_H_ROOT;
  67         if (strcmp(str, "root") == 0)
  68                 goto ok;
  69         maj = TC_H_UNSPEC;
  70         if (strcmp(str, "none") == 0)
  71                 goto ok;
  72         maj = strtoul(str, &p, 16);
  73         if (p == str) {
  74                 maj = 0;
  75                 if (*p != ':')
  76                         return -1;
  77         }
  78         if (*p == ':') {
  79                 if (maj >= (1<<16))
  80                         return -1;
  81                 maj <<= 16;
  82                 str = p+1;
  83                 min = strtoul(str, &p, 16);
  84                 if (*p != 0)
  85                         return -1;
  86                 if (min >= (1<<16))
  87                         return -1;
  88                 maj |= min;
  89         } else if (*p != 0)
  90                 return -1;
  91
  92 ok:
  93         *h = maj;
  94         return 0;
  95 }
  96
  97 int print_tc_classid(char *buf, int len, __u32 h)
  98 {
  99         if (h == TC_H_ROOT)
 100                 sprintf(buf, "root");
 101         else if (h == TC_H_UNSPEC)
 102                 snprintf(buf, len, "none");
 103         else if (TC_H_MAJ(h) == 0)
 104                 snprintf(buf, len, ":%x", TC_H_MIN(h));
 105         else if (TC_H_MIN(h) == 0)
 106                 snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
 107         else
 108                 snprintf(buf, len, "%x:%x", TC_H_MAJ(h)>>16, TC_H_MIN(h));
 109         return 0;
 110 }
 111
 112 char * sprint_tc_classid(__u32 h, char *buf)
 113 {
 114         if (print_tc_classid(buf, SPRINT_BSIZE-1, h))
 115                 strcpy(buf, "???");
 116         return buf;
 117 }
 118
 119 /* See http://physics.nist.gov/cuu/Units/binary.html */
 120 static const struct rate_suffix {
 121         const char *name;
 122         double scale;
 123 } suffixes[] = {
 124         { "bit",        1. },
 125         { "Kibit",      1024. },
 126         { "kbit",       1000. },
 127         { "mibit",      1024.*1024. },
 128         { "mbit",       1000000. },
 129         { "gibit",      1024.*1024.*1024. },
 130         { "gbit",       1000000000. },
 131         { "tibit",      1024.*1024.*1024.*1024. },
 132         { "tbit",       1000000000000. },
 133         { "Bps",        8. },
 134         { "KiBps",      8.*1024. },
 135         { "KBps",       8000. },
 136         { "MiBps",      8.*1024*1024. },
 137         { "MBps",       8000000. },
 138         { "GiBps",      8.*1024.*1024.*1024. },
 139         { "GBps",       8000000000. },
 140         { "TiBps",      8.*1024.*1024.*1024.*1024. },
 141         { "TBps",       8000000000000. },
 142         { NULL }
 143 };
 144
 145
 146 int get_rate(unsigned *rate, const char *str)
 147 {
 148         char *p;
 149         double bps = strtod(str, &p);
 150         const struct rate_suffix *s;
 151
 152         if (p == str)
 153                 return -1;
 154
 155         if (*p == '\0') {
 156                 *rate = bps / 8.;       /* assume bytes/sec */
 157                 return 0;
 158         }
 159
 160         for (s = suffixes; s->name; ++s) {
 161                 if (strcasecmp(s->name, p) == 0) {
 162                         *rate = (bps * s->scale) / 8.;
 163                         return 0;
 164                 }
 165         }
 166
 167         return -1;
 168 }
 169
 170 int get_rate_and_cell(unsigned *rate, int *cell_log, char *str)
 171 {
 172         char * slash = strchr(str, '/');
 173
 174         if (slash)
 175                 *slash = 0;
 176
 177         if (get_rate(rate, str))
 178                 return -1;
 179
 180         if (slash) {
 181                 int cell;
 182                 int i;
 183
 184                 if (get_integer(&cell, slash+1, 0))
 185                         return -1;
 186                 *slash = '/';
 187
 188                 for (i=0; i<32; i++) {
 189                         if ((1<<i) == cell) {
 190                                 *cell_log = i;
 191                                 return 0;
 192                         }
 193                 }
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 void print_rate(char *buf, int len, __u32 rate)
 200 {
 201         double tmp = (double)rate*8;
 202         extern int use_iec;
 203
 204         if (use_iec) {
 205                 if (tmp >= 1000.0*1024.0*1024.0)
 206                         snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
 207                 else if (tmp >= 1000.0*1024)
 208                         snprintf(buf, len, "%.0fKibit", tmp/1024);
 209                 else
 210                         snprintf(buf, len, "%.0fbit", tmp);
 211         } else {
 212                 if (tmp >= 1000.0*1000000.0)
 213                         snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
 214                 else if (tmp >= 1000.0 * 1000.0)
 215                         snprintf(buf, len, "%.0fKbit", tmp/1000.0);
 216                 else
 217                         snprintf(buf, len, "%.0fbit",  tmp);
 218         }
 219 }
 220
 221 char * sprint_rate(__u32 rate, char *buf)
 222 {
 223         print_rate(buf, SPRINT_BSIZE-1, rate);
 224         return buf;
 225 }
 226
 227 int get_time(unsigned *time, const char *str)
 228 {
 229         double t;
 230         char *p;
 231
 232         t = strtod(str, &p);
 233         if (p == str)
 234                 return -1;
 235
 236         if (*p) {
 237                 if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
 238                     strcasecmp(p, "secs")==0)
 239                         t *= TIME_UNITS_PER_SEC;
 240                 else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
 241                          strcasecmp(p, "msecs") == 0)
 242                         t *= TIME_UNITS_PER_SEC/1000;
 243                 else if (strcasecmp(p, "us") == 0 || strcasecmp(p, "usec")==0 ||
 244                          strcasecmp(p, "usecs") == 0)
 245                         t *= TIME_UNITS_PER_SEC/1000000;
 246                 else
 247                         return -1;
 248         }
 249
 250         *time = t;
 251         return 0;
 252 }
 253
 254
 255 void print_time(char *buf, int len, __u32 time)
 256 {
 257         double tmp = time;
 258
 259         if (tmp >= TIME_UNITS_PER_SEC)
 260                 snprintf(buf, len, "%.1fs", tmp/TIME_UNITS_PER_SEC);
 261         else if (tmp >= TIME_UNITS_PER_SEC/1000)
 262                 snprintf(buf, len, "%.1fms", tmp/(TIME_UNITS_PER_SEC/1000));
 263         else
 264                 snprintf(buf, len, "%uus", time);
 265 }
 266
 267 char * sprint_time(__u32 time, char *buf)
 268 {
 269         print_time(buf, SPRINT_BSIZE-1, time);
 270         return buf;
 271 }
 272
 273 char * sprint_ticks(__u32 ticks, char *buf)
 274 {
 275         return sprint_time(tc_core_tick2time(ticks), buf);
 276 }
 277
 278 int get_size(unsigned *size, const char *str)
 279 {
 280         double sz;
 281         char *p;
 282
 283         sz = strtod(str, &p);
 284         if (p == str)
 285                 return -1;
 286
 287         if (*p) {
 288                 if (strcasecmp(p, "kb") == 0 || strcasecmp(p, "k")==0)
 289                         sz *= 1024;
 290                 else if (strcasecmp(p, "gb") == 0 || strcasecmp(p, "g")==0)
 291                         sz *= 1024*1024*1024;
 292                 else if (strcasecmp(p, "gbit") == 0)
 293                         sz *= 1024*1024*1024/8;
 294                 else if (strcasecmp(p, "mb") == 0 || strcasecmp(p, "m")==0)
 295                         sz *= 1024*1024;
 296                 else if (strcasecmp(p, "mbit") == 0)
 297                         sz *= 1024*1024/8;
 298                 else if (strcasecmp(p, "kbit") == 0)
 299                         sz *= 1024/8;
 300                 else if (strcasecmp(p, "b") != 0)
 301                         return -1;
 302         }
 303
 304         *size = sz;
 305         return 0;
 306 }
 307
 308 int get_size_and_cell(unsigned *size, int *cell_log, char *str)
 309 {
 310         char * slash = strchr(str, '/');
 311
 312         if (slash)
 313                 *slash = 0;
 314
 315         if (get_size(size, str))
 316                 return -1;
 317
 318         if (slash) {
 319                 int cell;
 320                 int i;
 321
 322                 if (get_integer(&cell, slash+1, 0))
 323                         return -1;
 324                 *slash = '/';
 325
 326                 for (i=0; i<32; i++) {
 327                         if ((1<<i) == cell) {
 328                                 *cell_log = i;
 329                                 return 0;
 330                         }
 331                 }
 332                 return -1;
 333         }
 334         return 0;
 335 }
 336
 337 void print_size(char *buf, int len, __u32 sz)
 338 {
 339         double tmp = sz;
 340
 341         if (sz >= 1024*1024 && fabs(1024*1024*rint(tmp/(1024*1024)) - sz) < 1024)
 342                 snprintf(buf, len, "%gMb", rint(tmp/(1024*1024)));
 343         else if (sz >= 1024 && fabs(1024*rint(tmp/1024) - sz) < 16)
 344                 snprintf(buf, len, "%gKb", rint(tmp/1024));
 345         else
 346                 snprintf(buf, len, "%ub", sz);
 347 }
 348
 349 char * sprint_size(__u32 size, char *buf)
 350 {
 351         print_size(buf, SPRINT_BSIZE-1, size);
 352         return buf;
 353 }
 354
 355 static const double max_percent_value = 0xffffffff;
 356
 357 int get_percent(__u32 *percent, const char *str)
 358 {
 359         char *p;
 360         double per = strtod(str, &p) / 100.;
 361
 362         if (per > 1. || per < 0)
 363                 return -1;
 364         if (*p && strcmp(p, "%"))
 365                 return -1;
 366
 367         *percent = (unsigned) rint(per * max_percent_value);
 368         return 0;
 369 }
 370
 371 void print_percent(char *buf, int len, __u32 per)
 372 {
 373         snprintf(buf, len, "%g%%", 100. * (double) per / max_percent_value);
 374 }
 375
 376 char * sprint_percent(__u32 per, char *buf)
 377 {
 378         print_percent(buf, SPRINT_BSIZE-1, per);
 379         return buf;
 380 }
 381
 382 void print_qdisc_handle(char *buf, int len, __u32 h)
 383 {
 384         snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
 385 }
 386
 387 char * sprint_qdisc_handle(__u32 h, char *buf)
 388 {
 389         print_qdisc_handle(buf, SPRINT_BSIZE-1, h);
 390         return buf;
 391 }
 392
 393 char * action_n2a(int action, char *buf, int len)
 394 {
 395         switch (action) {
 396         case -1:
 397                 return "continue";
 398                 break;
 399         case TC_ACT_OK:
 400                 return "pass";
 401                 break;
 402         case TC_ACT_SHOT:
 403                 return "drop";
 404                 break;
 405         case TC_ACT_RECLASSIFY:
 406                 return "reclassify";
 407         case TC_ACT_PIPE:
 408                 return "pipe";
 409         case TC_ACT_STOLEN:
 410                 return "stolen";
 411         default:
 412                 snprintf(buf, len, "%d", action);
 413                 return buf;
 414         }
 415 }
 416
 417 int action_a2n(char *arg, int *result)
 418 {
 419         int res;
 420
 421         if (matches(arg, "continue") == 0)
 422                 res = -1;
 423         else if (matches(arg, "drop") == 0)
 424                 res = TC_ACT_SHOT;
 425         else if (matches(arg, "shot") == 0)
 426                 res = TC_ACT_SHOT;
 427         else if (matches(arg, "pass") == 0)
 428                 res = TC_ACT_OK;
 429         else if (strcmp(arg, "ok") == 0)
 430                 res = TC_ACT_OK;
 431         else if (matches(arg, "reclassify") == 0)
 432                 res = TC_ACT_RECLASSIFY;
 433         else {
 434                 char dummy;
 435                 if (sscanf(arg, "%d%c", &res, &dummy) != 1)
 436                         return -1;
 437         }
 438         *result = res;
 439         return 0;
 440 }
 441
 442 int get_linklayer(unsigned int *val, const char *arg)
 443 {
 444         int res;
 445
 446         if (matches(arg, "ethernet") == 0)
 447                 res = LINKLAYER_ETHERNET;
 448         else if (matches(arg, "atm") == 0)
 449                 res = LINKLAYER_ATM;
 450         else if (matches(arg, "adsl") == 0)
 451                 res = LINKLAYER_ATM;
 452         else
 453                 return -1; /* Indicate error */
 454
 455         *val = res;
 456         return 0;
 457 }
 458
 459 void print_tm(FILE * f, const struct tcf_t *tm)
 460 {
 461         int hz = get_user_hz();
 462         if (tm->install != 0)
 463                 fprintf(f, " installed %u sec", (unsigned)(tm->install/hz));
 464         if (tm->lastuse != 0)
 465                 fprintf(f, " used %u sec", (unsigned)(tm->lastuse/hz));
 466         if (tm->expires != 0)
 467                 fprintf(f, " expires %u sec", (unsigned)(tm->expires/hz));
 468 }
 469
 470 void print_tcstats2_attr(FILE *fp, struct rtattr *rta, char *prefix, struct rtattr **xstats)
 471 {
 472         SPRINT_BUF(b1);
 473         struct rtattr *tbs[TCA_STATS_MAX + 1];
 474
 475         parse_rtattr_nested(tbs, TCA_STATS_MAX, rta);
 476
 477         if (tbs[TCA_STATS_BASIC]) {
 478                 struct gnet_stats_basic bs = {0};
 479                 memcpy(&bs, RTA_DATA(tbs[TCA_STATS_BASIC]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_BASIC]), sizeof(bs)));
 480                 fprintf(fp, "%sSent %llu bytes %u pkt",
 481                         prefix, (unsigned long long) bs.bytes, bs.packets);
 482         }
 483
 484         if (tbs[TCA_STATS_QUEUE]) {
 485                 struct gnet_stats_queue q = {0};
 486                 memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
 487                 fprintf(fp, " (dropped %u, overlimits %u requeues %u) ",
 488                         q.drops, q.overlimits, q.requeues);
 489         }
 490
 491         if (tbs[TCA_STATS_RATE_EST]) {
 492                 struct gnet_stats_rate_est re = {0};
 493                 memcpy(&re, RTA_DATA(tbs[TCA_STATS_RATE_EST]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_RATE_EST]), sizeof(re)));
 494                 fprintf(fp, "\n%srate %s %upps ",
 495                         prefix, sprint_rate(re.bps, b1), re.pps);
 496         }
 497
 498         if (tbs[TCA_STATS_QUEUE]) {
 499                 struct gnet_stats_queue q = {0};
 500                 memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
 501                 if (!tbs[TCA_STATS_RATE_EST])
 502                         fprintf(fp, "\n%s", prefix);
 503                 fprintf(fp, "backlog %s %up requeues %u ",
 504                         sprint_size(q.backlog, b1), q.qlen, q.requeues);
 505         }
 506
 507         if (xstats)
 508                 *xstats = tbs[TCA_STATS_APP] ? : NULL;
 509 }
 510
 511 void print_tcstats_attr(FILE *fp, struct rtattr *tb[], char *prefix, struct rtattr **xstats)
 512 {
 513         SPRINT_BUF(b1);
 514
 515         if (tb[TCA_STATS2]) {
 516                 print_tcstats2_attr(fp, tb[TCA_STATS2], prefix, xstats);
 517                 if (xstats && NULL == *xstats)
 518                         goto compat_xstats;
 519                 return;
 520         }
 521         /* backward compatibility */
 522         if (tb[TCA_STATS]) {
 523                 struct tc_stats st;
 524
 525                 /* handle case where kernel returns more/less than we know about */
 526                 memset(&st, 0, sizeof(st));
 527                 memcpy(&st, RTA_DATA(tb[TCA_STATS]), MIN(RTA_PAYLOAD(tb[TCA_STATS]), sizeof(st)));
 528
 529                 fprintf(fp, "%sSent %llu bytes %u pkts (dropped %u, overlimits %u) ",
 530                         prefix, (unsigned long long)st.bytes, st.packets, st.drops,
 531                         st.overlimits);
 532
 533                 if (st.bps || st.pps || st.qlen || st.backlog) {
 534                         fprintf(fp, "\n%s", prefix);
 535                         if (st.bps || st.pps) {
 536                                 fprintf(fp, "rate ");
 537                                 if (st.bps)
 538                                         fprintf(fp, "%s ", sprint_rate(st.bps, b1));
 539                                 if (st.pps)
 540                                         fprintf(fp, "%upps ", st.pps);
 541                         }
 542                         if (st.qlen || st.backlog) {
 543                                 fprintf(fp, "backlog ");
 544                                 if (st.backlog)
 545                                         fprintf(fp, "%s ", sprint_size(st.backlog, b1));
 546                                 if (st.qlen)
 547                                         fprintf(fp, "%up ", st.qlen);
 548                         }
 549                 }
 550         }
 551
 552 compat_xstats:
 553         if (tb[TCA_XSTATS] && xstats)
 554                 *xstats = tb[TCA_XSTATS];
 555 }
 556