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 LIBDIR
  28 #define LIBDIR "/usr/lib"
  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 = LIBDIR "/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 bits/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 void print_rate(char *buf, int len, __u32 rate)
 171 {
 172         double tmp = (double)rate*8;
 173         extern int use_iec;
 174
 175         if (use_iec) {
 176                 if (tmp >= 1000.0*1024.0*1024.0)
 177                         snprintf(buf, len, "%.0fMibit", tmp/(1024.0*1024.0));
 178                 else if (tmp >= 1000.0*1024)
 179                         snprintf(buf, len, "%.0fKibit", tmp/1024);
 180                 else
 181                         snprintf(buf, len, "%.0fbit", tmp);
 182         } else {
 183                 if (tmp >= 1000.0*1000000.0)
 184                         snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
 185                 else if (tmp >= 1000.0 * 1000.0)
 186                         snprintf(buf, len, "%.0fKbit", tmp/1000.0);
 187                 else
 188                         snprintf(buf, len, "%.0fbit",  tmp);
 189         }
 190 }
 191
 192 char * sprint_rate(__u32 rate, char *buf)
 193 {
 194         print_rate(buf, SPRINT_BSIZE-1, rate);
 195         return buf;
 196 }
 197
 198 int get_time(unsigned *time, const char *str)
 199 {
 200         double t;
 201         char *p;
 202
 203         t = strtod(str, &p);
 204         if (p == str)
 205                 return -1;
 206
 207         if (*p) {
 208                 if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
 209                     strcasecmp(p, "secs")==0)
 210                         t *= TIME_UNITS_PER_SEC;
 211                 else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
 212                          strcasecmp(p, "msecs") == 0)
 213                         t *= TIME_UNITS_PER_SEC/1000;
 214                 else if (strcasecmp(p, "us") == 0 || strcasecmp(p, "usec")==0 ||
 215                          strcasecmp(p, "usecs") == 0)
 216                         t *= TIME_UNITS_PER_SEC/1000000;
 217                 else
 218                         return -1;
 219         }
 220
 221         *time = t;
 222         return 0;
 223 }
 224
 225
 226 void print_time(char *buf, int len, __u32 time)
 227 {
 228         double tmp = time;
 229
 230         if (tmp >= TIME_UNITS_PER_SEC)
 231                 snprintf(buf, len, "%.1fs", tmp/TIME_UNITS_PER_SEC);
 232         else if (tmp >= TIME_UNITS_PER_SEC/1000)
 233                 snprintf(buf, len, "%.1fms", tmp/(TIME_UNITS_PER_SEC/1000));
 234         else
 235                 snprintf(buf, len, "%uus", time);
 236 }
 237
 238 char * sprint_time(__u32 time, char *buf)
 239 {
 240         print_time(buf, SPRINT_BSIZE-1, time);
 241         return buf;
 242 }
 243
 244 char * sprint_ticks(__u32 ticks, char *buf)
 245 {
 246         return sprint_time(tc_core_tick2time(ticks), buf);
 247 }
 248
 249 int get_size(unsigned *size, const char *str)
 250 {
 251         double sz;
 252         char *p;
 253
 254         sz = strtod(str, &p);
 255         if (p == str)
 256                 return -1;
 257
 258         if (*p) {
 259                 if (strcasecmp(p, "kb") == 0 || strcasecmp(p, "k")==0)
 260                         sz *= 1024;
 261                 else if (strcasecmp(p, "gb") == 0 || strcasecmp(p, "g")==0)
 262                         sz *= 1024*1024*1024;
 263                 else if (strcasecmp(p, "gbit") == 0)
 264                         sz *= 1024*1024*1024/8;
 265                 else if (strcasecmp(p, "mb") == 0 || strcasecmp(p, "m")==0)
 266                         sz *= 1024*1024;
 267                 else if (strcasecmp(p, "mbit") == 0)
 268                         sz *= 1024*1024/8;
 269                 else if (strcasecmp(p, "kbit") == 0)
 270                         sz *= 1024/8;
 271                 else if (strcasecmp(p, "b") != 0)
 272                         return -1;
 273         }
 274
 275         *size = sz;
 276         return 0;
 277 }
 278
 279 int get_size_and_cell(unsigned *size, int *cell_log, char *str)
 280 {
 281         char * slash = strchr(str, '/');
 282
 283         if (slash)
 284                 *slash = 0;
 285
 286         if (get_size(size, str))
 287                 return -1;
 288
 289         if (slash) {
 290                 int cell;
 291                 int i;
 292
 293                 if (get_integer(&cell, slash+1, 0))
 294                         return -1;
 295                 *slash = '/';
 296
 297                 for (i=0; i<32; i++) {
 298                         if ((1<<i) == cell) {
 299                                 *cell_log = i;
 300                                 return 0;
 301                         }
 302                 }
 303                 return -1;
 304         }
 305         return 0;
 306 }
 307
 308 void print_size(char *buf, int len, __u32 sz)
 309 {
 310         double tmp = sz;
 311
 312         if (sz >= 1024*1024 && fabs(1024*1024*rint(tmp/(1024*1024)) - sz) < 1024)
 313                 snprintf(buf, len, "%gMb", rint(tmp/(1024*1024)));
 314         else if (sz >= 1024 && fabs(1024*rint(tmp/1024) - sz) < 16)
 315                 snprintf(buf, len, "%gKb", rint(tmp/1024));
 316         else
 317                 snprintf(buf, len, "%ub", sz);
 318 }
 319
 320 char * sprint_size(__u32 size, char *buf)
 321 {
 322         print_size(buf, SPRINT_BSIZE-1, size);
 323         return buf;
 324 }
 325
 326 void print_qdisc_handle(char *buf, int len, __u32 h)
 327 {
 328         snprintf(buf, len, "%x:", TC_H_MAJ(h)>>16);
 329 }
 330
 331 char * sprint_qdisc_handle(__u32 h, char *buf)
 332 {
 333         print_qdisc_handle(buf, SPRINT_BSIZE-1, h);
 334         return buf;
 335 }
 336
 337 char * action_n2a(int action, char *buf, int len)
 338 {
 339         switch (action) {
 340         case -1:
 341                 return "continue";
 342                 break;
 343         case TC_ACT_OK:
 344                 return "pass";
 345                 break;
 346         case TC_ACT_SHOT:
 347                 return "drop";
 348                 break;
 349         case TC_ACT_RECLASSIFY:
 350                 return "reclassify";
 351         case TC_ACT_PIPE:
 352                 return "pipe";
 353         case TC_ACT_STOLEN:
 354                 return "stolen";
 355         default:
 356                 snprintf(buf, len, "%d", action);
 357                 return buf;
 358         }
 359 }
 360
 361 int action_a2n(char *arg, int *result)
 362 {
 363         int res;
 364
 365         if (matches(arg, "continue") == 0)
 366                 res = -1;
 367         else if (matches(arg, "drop") == 0)
 368                 res = TC_ACT_SHOT;
 369         else if (matches(arg, "shot") == 0)
 370                 res = TC_ACT_SHOT;
 371         else if (matches(arg, "pass") == 0)
 372                 res = TC_ACT_OK;
 373         else if (strcmp(arg, "ok") == 0)
 374                 res = TC_ACT_OK;
 375         else if (matches(arg, "reclassify") == 0)
 376                 res = TC_ACT_RECLASSIFY;
 377         else {
 378                 char dummy;
 379                 if (sscanf(arg, "%d%c", &res, &dummy) != 1)
 380                         return -1;
 381         }
 382         *result = res;
 383         return 0;
 384 }
 385
 386 int get_linklayer(unsigned *val, const char *arg)
 387 {
 388         int res;
 389
 390         if (matches(arg, "ethernet") == 0)
 391                 res = LINKLAYER_ETHERNET;
 392         else if (matches(arg, "atm") == 0)
 393                 res = LINKLAYER_ATM;
 394         else if (matches(arg, "adsl") == 0)
 395                 res = LINKLAYER_ATM;
 396         else
 397                 return -1; /* Indicate error */
 398
 399         *val = res;
 400         return 0;
 401 }
 402
 403 void print_linklayer(char *buf, int len, unsigned linklayer)
 404 {
 405         switch (linklayer) {
 406         case LINKLAYER_UNSPEC:
 407                 snprintf(buf, len, "%s", "unspec");
 408                 return;
 409         case LINKLAYER_ETHERNET:
 410                 snprintf(buf, len, "%s", "ethernet");
 411                 return;
 412         case LINKLAYER_ATM:
 413                 snprintf(buf, len, "%s", "atm");
 414                 return;
 415         default:
 416                 snprintf(buf, len, "%s", "unknown");
 417                 return;
 418         }
 419 }
 420
 421 char *sprint_linklayer(unsigned linklayer, char *buf)
 422 {
 423         print_linklayer(buf, SPRINT_BSIZE-1, linklayer);
 424         return buf;
 425 }
 426
 427 void print_tm(FILE * f, const struct tcf_t *tm)
 428 {
 429         int hz = get_user_hz();
 430         if (tm->install != 0)
 431                 fprintf(f, " installed %u sec", (unsigned)(tm->install/hz));
 432         if (tm->lastuse != 0)
 433                 fprintf(f, " used %u sec", (unsigned)(tm->lastuse/hz));
 434         if (tm->expires != 0)
 435                 fprintf(f, " expires %u sec", (unsigned)(tm->expires/hz));
 436 }
 437
 438 void print_tcstats2_attr(FILE *fp, struct rtattr *rta, char *prefix, struct rtattr **xstats)
 439 {
 440         SPRINT_BUF(b1);
 441         struct rtattr *tbs[TCA_STATS_MAX + 1];
 442
 443         parse_rtattr_nested(tbs, TCA_STATS_MAX, rta);
 444
 445         if (tbs[TCA_STATS_BASIC]) {
 446                 struct gnet_stats_basic bs = {0};
 447                 memcpy(&bs, RTA_DATA(tbs[TCA_STATS_BASIC]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_BASIC]), sizeof(bs)));
 448                 fprintf(fp, "%sSent %llu bytes %u pkt",
 449                         prefix, (unsigned long long) bs.bytes, bs.packets);
 450         }
 451
 452         if (tbs[TCA_STATS_QUEUE]) {
 453                 struct gnet_stats_queue q = {0};
 454                 memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
 455                 fprintf(fp, " (dropped %u, overlimits %u requeues %u) ",
 456                         q.drops, q.overlimits, q.requeues);
 457         }
 458
 459         if (tbs[TCA_STATS_RATE_EST]) {
 460                 struct gnet_stats_rate_est re = {0};
 461                 memcpy(&re, RTA_DATA(tbs[TCA_STATS_RATE_EST]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_RATE_EST]), sizeof(re)));
 462                 fprintf(fp, "\n%srate %s %upps ",
 463                         prefix, sprint_rate(re.bps, b1), re.pps);
 464         }
 465
 466         if (tbs[TCA_STATS_QUEUE]) {
 467                 struct gnet_stats_queue q = {0};
 468                 memcpy(&q, RTA_DATA(tbs[TCA_STATS_QUEUE]), MIN(RTA_PAYLOAD(tbs[TCA_STATS_QUEUE]), sizeof(q)));
 469                 if (!tbs[TCA_STATS_RATE_EST])
 470                         fprintf(fp, "\n%s", prefix);
 471                 fprintf(fp, "backlog %s %up requeues %u ",
 472                         sprint_size(q.backlog, b1), q.qlen, q.requeues);
 473         }
 474
 475         if (xstats)
 476                 *xstats = tbs[TCA_STATS_APP] ? : NULL;
 477 }
 478
 479 void print_tcstats_attr(FILE *fp, struct rtattr *tb[], char *prefix, struct rtattr **xstats)
 480 {
 481         SPRINT_BUF(b1);
 482
 483         if (tb[TCA_STATS2]) {
 484                 print_tcstats2_attr(fp, tb[TCA_STATS2], prefix, xstats);
 485                 if (xstats && NULL == *xstats)
 486                         goto compat_xstats;
 487                 return;
 488         }
 489         /* backward compatibility */
 490         if (tb[TCA_STATS]) {
 491                 struct tc_stats st;
 492
 493                 /* handle case where kernel returns more/less than we know about */
 494                 memset(&st, 0, sizeof(st));
 495                 memcpy(&st, RTA_DATA(tb[TCA_STATS]), MIN(RTA_PAYLOAD(tb[TCA_STATS]), sizeof(st)));
 496
 497                 fprintf(fp, "%sSent %llu bytes %u pkts (dropped %u, overlimits %u) ",
 498                         prefix, (unsigned long long)st.bytes, st.packets, st.drops,
 499                         st.overlimits);
 500
 501                 if (st.bps || st.pps || st.qlen || st.backlog) {
 502                         fprintf(fp, "\n%s", prefix);
 503                         if (st.bps || st.pps) {
 504                                 fprintf(fp, "rate ");
 505                                 if (st.bps)
 506                                         fprintf(fp, "%s ", sprint_rate(st.bps, b1));
 507                                 if (st.pps)
 508                                         fprintf(fp, "%upps ", st.pps);
 509                         }
 510                         if (st.qlen || st.backlog) {
 511                                 fprintf(fp, "backlog ");
 512                                 if (st.backlog)
 513                                         fprintf(fp, "%s ", sprint_size(st.backlog, b1));
 514                                 if (st.qlen)
 515                                         fprintf(fp, "%up ", st.qlen);
 516                         }
 517                 }
 518         }
 519
 520 compat_xstats:
 521         if (tb[TCA_XSTATS] && xstats)
 522                 *xstats = tb[TCA_XSTATS];
 523 }
 524