src/sys_fs_cgroup.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <inttypes.h>
   8 #include <sys/types.h>
   9 #include <dirent.h>
  10 #include <string.h>
  11
  12 #include "common.h"
  13 #include "appconfig.h"
  14 #include "procfile.h"
  15 #include "log.h"
  16 #include "rrd.h"
  17 #include "main.h"
  18 #include "popen.h"
  19 #include "proc_self_mountinfo.h"
  20
  21 // ----------------------------------------------------------------------------
  22 // cgroup globals
  23
  24 static int cgroup_enable_cpuacct_stat = CONFIG_ONDEMAND_ONDEMAND;
  25 static int cgroup_enable_cpuacct_usage = CONFIG_ONDEMAND_ONDEMAND;
  26 static int cgroup_enable_memory = CONFIG_ONDEMAND_ONDEMAND;
  27 static int cgroup_enable_blkio = CONFIG_ONDEMAND_ONDEMAND;
  28 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
  29 static int cgroup_check_for_new_every = 10;
  30 static char *cgroup_cpuacct_base = NULL;
  31 static char *cgroup_blkio_base = NULL;
  32 static char *cgroup_memory_base = NULL;
  33
  34 static int cgroup_root_count = 0;
  35 static int cgroup_root_max = 500;
  36 static int cgroup_max_depth = 0;
  37
  38 void read_cgroup_plugin_configuration() {
  39         cgroup_check_for_new_every = config_get_number("plugin:cgroups", "check for new cgroups every", cgroup_check_for_new_every);
  40
  41         cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat", cgroup_enable_cpuacct_stat);
  42         cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage", cgroup_enable_cpuacct_usage);
  43         cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory", cgroup_enable_memory);
  44         cgroup_enable_blkio = config_get_boolean_ondemand("plugin:cgroups", "enable blkio", cgroup_enable_blkio);
  45
  46         char filename[FILENAME_MAX + 1], *s;
  47         struct mountinfo *mi, *root = mountinfo_read();
  48
  49         mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
  50         if(!mi) mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
  51         if(!mi) s = "/sys/fs/cgroup/cpuacct";
  52         else s = mi->mount_point;
  53         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  54         cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
  55
  56         mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
  57         if(!mi) mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
  58         if(!mi) s = "/sys/fs/cgroup/blkio";
  59         else s = mi->mount_point;
  60         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  61         cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
  62
  63         mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
  64         if(!mi) mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
  65         if(!mi) s = "/sys/fs/cgroup/memory";
  66         else s = mi->mount_point;
  67         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  68         cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
  69
  70         cgroup_root_max = config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
  71         cgroup_max_depth = config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
  72
  73         cgroup_enable_new_cgroups_detected_at_runtime = config_get_boolean("plugin:cgroups", "enable new cgroups detected at run time", cgroup_enable_new_cgroups_detected_at_runtime);
  74
  75         mountinfo_free(root);
  76 }
  77
  78 // ----------------------------------------------------------------------------
  79 // cgroup objects
  80
  81 struct blkio {
  82         int updated;
  83
  84         char *filename;
  85
  86         unsigned long long Read;
  87         unsigned long long Write;
  88 /*
  89         unsigned long long Sync;
  90         unsigned long long Async;
  91         unsigned long long Total;
  92 */
  93 };
  94
  95 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
  96 struct memory {
  97         int updated;
  98
  99         char *filename;
 100
 101         int has_dirty_swap;
 102
 103         unsigned long long cache;
 104         unsigned long long rss;
 105         unsigned long long rss_huge;
 106         unsigned long long mapped_file;
 107         unsigned long long writeback;
 108         unsigned long long dirty;
 109         unsigned long long swap;
 110         unsigned long long pgpgin;
 111         unsigned long long pgpgout;
 112         unsigned long long pgfault;
 113         unsigned long long pgmajfault;
 114 /*
 115         unsigned long long inactive_anon;
 116         unsigned long long active_anon;
 117         unsigned long long inactive_file;
 118         unsigned long long active_file;
 119         unsigned long long unevictable;
 120         unsigned long long hierarchical_memory_limit;
 121         unsigned long long total_cache;
 122         unsigned long long total_rss;
 123         unsigned long long total_rss_huge;
 124         unsigned long long total_mapped_file;
 125         unsigned long long total_writeback;
 126         unsigned long long total_dirty;
 127         unsigned long long total_swap;
 128         unsigned long long total_pgpgin;
 129         unsigned long long total_pgpgout;
 130         unsigned long long total_pgfault;
 131         unsigned long long total_pgmajfault;
 132         unsigned long long total_inactive_anon;
 133         unsigned long long total_active_anon;
 134         unsigned long long total_inactive_file;
 135         unsigned long long total_active_file;
 136         unsigned long long total_unevictable;
 137 */
 138 };
 139
 140 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 141 struct cpuacct_stat {
 142         int updated;
 143
 144         char *filename;
 145
 146         unsigned long long user;
 147         unsigned long long system;
 148 };
 149
 150 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 151 struct cpuacct_usage {
 152         int updated;
 153
 154         char *filename;
 155
 156         unsigned int cpus;
 157         unsigned long long *cpu_percpu;
 158 };
 159
 160 struct cgroup {
 161         int available;          // found in the filesystem
 162         int enabled;            // enabled in the config
 163
 164         char *id;
 165         uint32_t hash;
 166
 167         char *chart_id;
 168         char *chart_title;
 169
 170         struct cpuacct_stat cpuacct_stat;
 171         struct cpuacct_usage cpuacct_usage;
 172
 173         struct memory memory;
 174
 175         struct blkio io_service_bytes;                          // bytes
 176         struct blkio io_serviced;                                       // operations
 177
 178         struct blkio throttle_io_service_bytes;         // bytes
 179         struct blkio throttle_io_serviced;                      // operations
 180
 181         struct blkio io_merged;                                         // operations
 182         struct blkio io_queued;                                         // operations
 183
 184         struct cgroup *next;
 185
 186 } *cgroup_root = NULL;
 187
 188 // ----------------------------------------------------------------------------
 189 // read values from /sys
 190
 191 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 192         static procfile *ff = NULL;
 193
 194         static uint32_t user_hash = 0;
 195         static uint32_t system_hash = 0;
 196
 197         if(unlikely(user_hash == 0)) {
 198                 user_hash = simple_hash("user");
 199                 system_hash = simple_hash("system");
 200         }
 201
 202         cp->updated = 0;
 203         if(cp->filename) {
 204                 ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 205                 if(!ff) return;
 206
 207                 ff = procfile_readall(ff);
 208                 if(!ff) return;
 209
 210                 unsigned long i, lines = procfile_lines(ff);
 211
 212                 if(lines < 1) {
 213                         error("File '%s' should have 1+ lines.", cp->filename);
 214                         return;
 215                 }
 216
 217                 for(i = 0; i < lines ; i++) {
 218                         char *s = procfile_lineword(ff, i, 0);
 219                         uint32_t hash = simple_hash(s);
 220
 221                         if(hash == user_hash && !strcmp(s, "user"))
 222                                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 223
 224                         else if(hash == system_hash && !strcmp(s, "system"))
 225                                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 226                 }
 227
 228                 cp->updated = 1;
 229
 230                 // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 231         }
 232 }
 233
 234 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 235         static procfile *ff = NULL;
 236
 237         ca->updated = 0;
 238         if(ca->filename) {
 239                 ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 240                 if(!ff) return;
 241
 242                 ff = procfile_readall(ff);
 243                 if(!ff) return;
 244
 245                 if(procfile_lines(ff) < 1) {
 246                         error("File '%s' should have 1+ lines but has %d.", ca->filename, procfile_lines(ff));
 247                         return;
 248                 }
 249
 250                 unsigned long i = procfile_linewords(ff, 0);
 251                 if(i <= 0) return;
 252
 253                 // we may have 1 more CPU reported
 254                 while(i > 0) {
 255                         char *s = procfile_lineword(ff, 0, i - 1);
 256                         if(!*s) i--;
 257                         else break;
 258                 }
 259
 260                 if(i != ca->cpus) {
 261                         free(ca->cpu_percpu);
 262
 263                         ca->cpu_percpu = malloc(sizeof(unsigned long long) * i);
 264                         if(!ca->cpu_percpu)
 265                                 fatal("Cannot allocate memory (%z bytes)", sizeof(unsigned long long) * i);
 266
 267                         ca->cpus = i;
 268                 }
 269
 270                 for(i = 0; i < ca->cpus ;i++) {
 271                         ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 272                         // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 273                 }
 274
 275                 ca->updated = 1;
 276         }
 277 }
 278
 279 void cgroup_read_blkio(struct blkio *io) {
 280         static procfile *ff = NULL;
 281
 282         static uint32_t Read_hash = 0;
 283         static uint32_t Write_hash = 0;
 284 /*
 285         static uint32_t Sync_hash = 0;
 286         static uint32_t Async_hash = 0;
 287         static uint32_t Total_hash = 0;
 288 */
 289
 290         if(unlikely(Read_hash == 0)) {
 291                 Read_hash = simple_hash("Read");
 292                 Write_hash = simple_hash("Write");
 293 /*
 294                 Sync_hash = simple_hash("Sync");
 295                 Async_hash = simple_hash("Async");
 296                 Total_hash = simple_hash("Total");
 297 */
 298         }
 299
 300         io->updated = 0;
 301         if(io->filename) {
 302                 ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 303                 if(!ff) return;
 304
 305                 ff = procfile_readall(ff);
 306                 if(!ff) return;
 307
 308                 unsigned long i, lines = procfile_lines(ff);
 309
 310                 if(lines < 1) {
 311                         error("File '%s' should have 1+ lines.", io->filename);
 312                         return;
 313                 }
 314
 315                 io->Read = 0;
 316                 io->Write = 0;
 317 /*
 318                 io->Sync = 0;
 319                 io->Async = 0;
 320                 io->Total = 0;
 321 */
 322
 323                 for(i = 0; i < lines ; i++) {
 324                         char *s = procfile_lineword(ff, i, 1);
 325                         uint32_t hash = simple_hash(s);
 326
 327                         if(hash == Read_hash && !strcmp(s, "Read"))
 328                                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 329
 330                         else if(hash == Write_hash && !strcmp(s, "Write"))
 331                                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 332
 333 /*
 334                         else if(hash == Sync_hash && !strcmp(s, "Sync"))
 335                                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 336
 337                         else if(hash == Async_hash && !strcmp(s, "Async"))
 338                                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 339
 340                         else if(hash == Total_hash && !strcmp(s, "Total"))
 341                                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 342 */
 343                 }
 344
 345                 io->updated = 1;
 346                 // fprintf(stderr, "READ '%s': Read: %llu, Write: %llu, Sync: %llu, Async: %llu, Total: %llu\n", io->filename, io->Read, io->Write, io->Sync, io->Async, io->Total);
 347         }
 348 }
 349
 350 void cgroup_read_memory(struct memory *mem) {
 351         static procfile *ff = NULL;
 352
 353         static uint32_t cache_hash = 0;
 354         static uint32_t rss_hash = 0;
 355         static uint32_t rss_huge_hash = 0;
 356         static uint32_t mapped_file_hash = 0;
 357         static uint32_t writeback_hash = 0;
 358         static uint32_t dirty_hash = 0;
 359         static uint32_t swap_hash = 0;
 360         static uint32_t pgpgin_hash = 0;
 361         static uint32_t pgpgout_hash = 0;
 362         static uint32_t pgfault_hash = 0;
 363         static uint32_t pgmajfault_hash = 0;
 364 /*
 365         static uint32_t inactive_anon_hash = 0;
 366         static uint32_t active_anon_hash = 0;
 367         static uint32_t inactive_file_hash = 0;
 368         static uint32_t active_file_hash = 0;
 369         static uint32_t unevictable_hash = 0;
 370         static uint32_t hierarchical_memory_limit_hash = 0;
 371         static uint32_t total_cache_hash = 0;
 372         static uint32_t total_rss_hash = 0;
 373         static uint32_t total_rss_huge_hash = 0;
 374         static uint32_t total_mapped_file_hash = 0;
 375         static uint32_t total_writeback_hash = 0;
 376         static uint32_t total_dirty_hash = 0;
 377         static uint32_t total_swap_hash = 0;
 378         static uint32_t total_pgpgin_hash = 0;
 379         static uint32_t total_pgpgout_hash = 0;
 380         static uint32_t total_pgfault_hash = 0;
 381         static uint32_t total_pgmajfault_hash = 0;
 382         static uint32_t total_inactive_anon_hash = 0;
 383         static uint32_t total_active_anon_hash = 0;
 384         static uint32_t total_inactive_file_hash = 0;
 385         static uint32_t total_active_file_hash = 0;
 386         static uint32_t total_unevictable_hash = 0;
 387 */
 388         if(unlikely(cache_hash == 0)) {
 389                 cache_hash = simple_hash("cache");
 390                 rss_hash = simple_hash("rss");
 391                 rss_huge_hash = simple_hash("rss_huge");
 392                 mapped_file_hash = simple_hash("mapped_file");
 393                 writeback_hash = simple_hash("writeback");
 394                 dirty_hash = simple_hash("dirty");
 395                 swap_hash = simple_hash("swap");
 396                 pgpgin_hash = simple_hash("pgpgin");
 397                 pgpgout_hash = simple_hash("pgpgout");
 398                 pgfault_hash = simple_hash("pgfault");
 399                 pgmajfault_hash = simple_hash("pgmajfault");
 400 /*
 401                 inactive_anon_hash = simple_hash("inactive_anon");
 402                 active_anon_hash = simple_hash("active_anon");
 403                 inactive_file_hash = simple_hash("inactive_file");
 404                 active_file_hash = simple_hash("active_file");
 405                 unevictable_hash = simple_hash("unevictable");
 406                 hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 407                 total_cache_hash = simple_hash("total_cache");
 408                 total_rss_hash = simple_hash("total_rss");
 409                 total_rss_huge_hash = simple_hash("total_rss_huge");
 410                 total_mapped_file_hash = simple_hash("total_mapped_file");
 411                 total_writeback_hash = simple_hash("total_writeback");
 412                 total_dirty_hash = simple_hash("total_dirty");
 413                 total_swap_hash = simple_hash("total_swap");
 414                 total_pgpgin_hash = simple_hash("total_pgpgin");
 415                 total_pgpgout_hash = simple_hash("total_pgpgout");
 416                 total_pgfault_hash = simple_hash("total_pgfault");
 417                 total_pgmajfault_hash = simple_hash("total_pgmajfault");
 418                 total_inactive_anon_hash = simple_hash("total_inactive_anon");
 419                 total_active_anon_hash = simple_hash("total_active_anon");
 420                 total_inactive_file_hash = simple_hash("total_inactive_file");
 421                 total_active_file_hash = simple_hash("total_active_file");
 422                 total_unevictable_hash = simple_hash("total_unevictable");
 423 */
 424         }
 425
 426         mem->updated = 0;
 427         if(mem->filename) {
 428                 ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 429                 if(!ff) return;
 430
 431                 ff = procfile_readall(ff);
 432                 if(!ff) return;
 433
 434                 unsigned long i, lines = procfile_lines(ff);
 435
 436                 if(lines < 1) {
 437                         error("File '%s' should have 1+ lines.", mem->filename);
 438                         return;
 439                 }
 440
 441                 for(i = 0; i < lines ; i++) {
 442                         char *s = procfile_lineword(ff, i, 0);
 443                         uint32_t hash = simple_hash(s);
 444
 445                         if(hash == cache_hash && !strcmp(s, "cache"))
 446                                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 447
 448                         else if(hash == rss_hash && !strcmp(s, "rss"))
 449                                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 450
 451                         else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 452                                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 453
 454                         else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 455                                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 456
 457                         else if(hash == writeback_hash && !strcmp(s, "writeback"))
 458                                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 459
 460                         else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 461                                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 462                                 mem->has_dirty_swap = 1;
 463                         }
 464
 465                         else if(hash == swap_hash && !strcmp(s, "swap")) {
 466                                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 467                                 mem->has_dirty_swap = 1;
 468                         }
 469
 470                         else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 471                                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 472
 473                         else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 474                                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 475
 476                         else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 477                                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 478
 479                         else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 480                                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 481
 482 /*
 483                         else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 484                                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 485
 486                         else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 487                                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 488
 489                         else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 490                                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 491
 492                         else if(hash == active_file_hash && !strcmp(s, "active_file"))
 493                                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 494
 495                         else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 496                                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 497
 498                         else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 499                                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 500
 501                 else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 502                                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 503
 504                         else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 505                                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 506
 507                         else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 508                                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 509
 510                         else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 511                                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 512
 513                         else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 514                                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 515
 516                         else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 517                                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 518
 519                         else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 520                                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 521
 522                         else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 523                                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 524
 525                         else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 526                                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 527
 528                         else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 529                                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 530
 531                         else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 532                                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 533
 534                         else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 535                                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 536
 537                         else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 538                                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 539
 540                         else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 541                                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 542
 543                         else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 544                                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 545
 546                         else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 547                                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 548 */
 549                 }
 550
 551                 // fprintf(stderr, "READ: '%s', cache: %llu, rss: %llu, rss_huge: %llu, mapped_file: %llu, writeback: %llu, dirty: %llu, swap: %llu, pgpgin: %llu, pgpgout: %llu, pgfault: %llu, pgmajfault: %llu, inactive_anon: %llu, active_anon: %llu, inactive_file: %llu, active_file: %llu, unevictable: %llu, hierarchical_memory_limit: %llu, total_cache: %llu, total_rss: %llu, total_rss_huge: %llu, total_mapped_file: %llu, total_writeback: %llu, total_dirty: %llu, total_swap: %llu, total_pgpgin: %llu, total_pgpgout: %llu, total_pgfault: %llu, total_pgmajfault: %llu, total_inactive_anon: %llu, total_active_anon: %llu, total_inactive_file: %llu, total_active_file: %llu, total_unevictable: %llu\n", mem->filename, mem->cache, mem->rss, mem->rss_huge, mem->mapped_file, mem->writeback, mem->dirty, mem->swap, mem->pgpgin, mem->pgpgout, mem->pgfault, mem->pgmajfault, mem->inactive_anon, mem->active_anon, mem->inactive_file, mem->active_file, mem->unevictable, mem->hierarchical_memory_limit, mem->total_cache, mem->total_rss, mem->total_rss_huge, mem->total_mapped_file, mem->total_writeback, mem->total_dirty, mem->total_swap, mem->total_pgpgin, mem->total_pgpgout, mem->total_pgfault, mem->total_pgmajfault, mem->total_inactive_anon, mem->total_active_anon, mem->total_inactive_file, mem->total_active_file, mem->total_unevictable);
 552
 553                 mem->updated = 1;
 554         }
 555 }
 556
 557 void cgroup_read(struct cgroup *cg) {
 558         debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
 559
 560         cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 561         cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 562         cgroup_read_memory(&cg->memory);
 563         cgroup_read_blkio(&cg->io_service_bytes);
 564         cgroup_read_blkio(&cg->io_serviced);
 565         cgroup_read_blkio(&cg->throttle_io_service_bytes);
 566         cgroup_read_blkio(&cg->throttle_io_serviced);
 567         cgroup_read_blkio(&cg->io_merged);
 568         cgroup_read_blkio(&cg->io_queued);
 569 }
 570
 571 void read_all_cgroups(struct cgroup *root) {
 572         debug(D_CGROUP, "reading metrics for all cgroups");
 573
 574         struct cgroup *cg;
 575
 576         for(cg = root; cg ; cg = cg->next)
 577                 if(cg->enabled && cg->available)
 578                         cgroup_read(cg);
 579 }
 580
 581 // ----------------------------------------------------------------------------
 582 // add/remove/find cgroup objects
 583
 584 #define CGROUP_CHARTID_LINE_MAX 1024
 585
 586 void cgroup_get_chart_id(struct cgroup *cg) {
 587         debug(D_CGROUP, "getting the name of cgroup '%s'", cg->id);
 588
 589         pid_t cgroup_pid;
 590         char buffer[CGROUP_CHARTID_LINE_MAX + 1];
 591
 592         snprintf(buffer, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'",
 593                  config_get("plugin:cgroups", "script to get cgroup names", PLUGINS_DIR "/cgroup-name.sh"), cg->chart_id);
 594
 595         debug(D_CGROUP, "executing command '%s' for cgroup '%s'", buffer, cg->id);
 596         FILE *fp = mypopen(buffer, &cgroup_pid);
 597         if(!fp) {
 598                 error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
 599                 return;
 600         }
 601         debug(D_CGROUP, "reading from command '%s' for cgroup '%s'", buffer, cg->id);
 602         char *s = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp);
 603         debug(D_CGROUP, "closing command for cgroup '%s'", cg->id);
 604         mypclose(fp, cgroup_pid);
 605         debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
 606
 607         if(s && *s && *s != '\n') {
 608                 debug(D_CGROUP, "cgroup '%s' should be renamed to '%s'", cg->id, s);
 609
 610                 trim(s);
 611
 612                 free(cg->chart_title);
 613                 cg->chart_title = strdup(s);
 614                 if(!cg->chart_title)
 615                         fatal("CGROUP: Cannot allocate memory for chart name of cgroup '%s' chart name: '%s'", cg->id, s);
 616
 617                 netdata_fix_chart_name(cg->chart_title);
 618
 619                 free(cg->chart_id);
 620                 cg->chart_id = strdup(s);
 621                 if(!cg->chart_id)
 622                         fatal("CGROUP: Cannot allocate memory for chart id of cgroup '%s' chart id: '%s'", cg->id, s);
 623
 624                 netdata_fix_chart_id(cg->chart_id);
 625
 626                 debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
 627         }
 628         else debug(D_CGROUP, "cgroup '%s' is not to be renamed (will be shown as '%s')", cg->id, cg->chart_id);
 629 }
 630
 631 struct cgroup *cgroup_add(const char *id) {
 632         debug(D_CGROUP, "adding cgroup '%s'", id);
 633
 634         if(cgroup_root_count >= cgroup_root_max) {
 635                 info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 636                 return NULL;
 637         }
 638
 639         int def = cgroup_enable_new_cgroups_detected_at_runtime;
 640         const char *chart_id = id;
 641         if(!*chart_id) {
 642                 chart_id = "/";
 643
 644                 // disable by default the root cgroup
 645                 def = 0;
 646                 debug(D_CGROUP, "cgroup '%s' is the root container (by default %s)", id, (def)?"enabled":"disabled");
 647         }
 648         else {
 649                 if(*chart_id == '/') chart_id++;
 650
 651                 size_t len = strlen(chart_id);
 652
 653                 // disable by default the parent cgroup
 654                 // for known cgroup managers
 655                 if(!strcmp(chart_id, "lxc") ||
 656                                 !strcmp(chart_id, "docker") ||
 657                                 !strcmp(chart_id, "libvirt") ||
 658                                 !strcmp(chart_id, "qemu") ||
 659                                 !strcmp(chart_id, "systemd") ||
 660                                 !strcmp(chart_id, "system.slice") ||
 661                                 !strcmp(chart_id, "machine.slice") ||
 662                                 !strcmp(chart_id, "user") ||
 663                                 !strcmp(chart_id, "system") ||
 664                                 !strcmp(chart_id, "machine") ||
 665                                 // starts with them
 666                                 (len >  6 && !strncmp(chart_id, "user/", 6)) ||
 667                                 (len > 11 && !strncmp(chart_id, "user.slice/", 11)) ||
 668                                 // ends with them
 669                                 (len >  5 && !strncmp(&chart_id[len -  5], ".user", 5)) ||
 670                                 (len >  5 && !strncmp(&chart_id[len -  5], ".swap", 5)) ||
 671                                 (len >  6 && !strncmp(&chart_id[len -  6], ".slice", 6)) ||
 672                                 (len >  6 && !strncmp(&chart_id[len -  6], ".mount", 6)) ||
 673                                 (len >  8 && !strncmp(&chart_id[len -  8], ".session", 8)) ||
 674                                 (len >  8 && !strncmp(&chart_id[len -  8], ".service", 8)) ||
 675                                 (len > 10 && !strncmp(&chart_id[len - 10], ".partition", 10))
 676                                 ) {
 677                         def = 0;
 678                         debug(D_CGROUP, "cgroup '%s' is %s (by default)", id, (def)?"enabled":"disabled");
 679                 }
 680         }
 681
 682         struct cgroup *cg = calloc(1, sizeof(struct cgroup));
 683         if(!cg) fatal("Cannot allocate memory for cgroup '%s'", id);
 684
 685         debug(D_CGROUP, "adding cgroup '%s'", id);
 686
 687         cg->id = strdup(id);
 688         if(!cg->id) fatal("Cannot allocate memory for cgroup '%s'", id);
 689
 690         cg->hash = simple_hash(cg->id);
 691
 692         cg->chart_id = strdup(chart_id);
 693         if(!cg->chart_id) fatal("Cannot allocate memory for cgroup '%s'", id);
 694
 695         cg->chart_title = strdup(chart_id);
 696         if(!cg->chart_title) fatal("Cannot allocate memory for cgroup '%s'", id);
 697
 698         if(!cgroup_root)
 699                 cgroup_root = cg;
 700         else {
 701                 // append it
 702                 struct cgroup *e;
 703                 for(e = cgroup_root; e->next ;e = e->next) ;
 704                 e->next = cg;
 705         }
 706
 707         cgroup_root_count++;
 708
 709         // fix the name by calling the external script
 710         cgroup_get_chart_id(cg);
 711
 712         char option[FILENAME_MAX + 1];
 713         snprintf(option, FILENAME_MAX, "enable cgroup %s", cg->chart_title);
 714         cg->enabled = config_get_boolean("plugin:cgroups", option, def);
 715
 716         debug(D_CGROUP, "Added cgroup '%s' with chart id '%s' and title '%s' as %s (default was %s)", cg->id, cg->chart_id, cg->chart_title, (cg->enabled)?"enabled":"disabled", (def)?"enabled":"disabled");
 717
 718         return cg;
 719 }
 720
 721 void cgroup_free(struct cgroup *cg) {
 722         debug(D_CGROUP, "Removing cgroup '%s' with chart id '%s' (was %s and %s)", cg->id, cg->chart_id, (cg->enabled)?"enabled":"disabled", (cg->available)?"available":"not available");
 723
 724         free(cg->cpuacct_usage.cpu_percpu);
 725
 726         free(cg->cpuacct_stat.filename);
 727         free(cg->cpuacct_usage.filename);
 728         free(cg->memory.filename);
 729         free(cg->io_service_bytes.filename);
 730         free(cg->io_serviced.filename);
 731         free(cg->throttle_io_service_bytes.filename);
 732         free(cg->throttle_io_serviced.filename);
 733         free(cg->io_merged.filename);
 734         free(cg->io_queued.filename);
 735
 736         free(cg->id);
 737         free(cg->chart_id);
 738         free(cg->chart_title);
 739         free(cg);
 740
 741         cgroup_root_count--;
 742 }
 743
 744 // find if a given cgroup exists
 745 struct cgroup *cgroup_find(const char *id) {
 746         debug(D_CGROUP, "searching for cgroup '%s'", id);
 747
 748         uint32_t hash = simple_hash(id);
 749
 750         struct cgroup *cg;
 751         for(cg = cgroup_root; cg ; cg = cg->next) {
 752                 if(hash == cg->hash && strcmp(id, cg->id) == 0)
 753                         break;
 754         }
 755
 756         debug(D_CGROUP, "cgroup_find('%s') %s", id, (cg)?"found":"not found");
 757         return cg;
 758 }
 759
 760 // ----------------------------------------------------------------------------
 761 // detect running cgroups
 762
 763 // callback for find_file_in_subdirs()
 764 void found_subdir_in_dir(const char *dir) {
 765         debug(D_CGROUP, "examining cgroup dir '%s'", dir);
 766
 767         struct cgroup *cg = cgroup_find(dir);
 768         if(!cg) {
 769                 if(*dir && cgroup_max_depth > 0) {
 770                         int depth = 0;
 771                         const char *s;
 772
 773                         for(s = dir; *s ;s++)
 774                                 if(unlikely(*s == '/'))
 775                                         depth++;
 776
 777                         if(depth > cgroup_max_depth) {
 778                                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 779                                 return;
 780                         }
 781                 }
 782                 debug(D_CGROUP, "will add dir '%s' as cgroup", dir);
 783                 cg = cgroup_add(dir);
 784         }
 785
 786         if(cg) cg->available = 1;
 787 }
 788
 789 void find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 790         int enabled = -1;
 791         if(!this) this = base;
 792         size_t dirlen = strlen(this), baselen = strlen(base);
 793         const char *relative_path = &this[baselen];
 794
 795         DIR *dir = opendir(this);
 796         if(!dir) return;
 797
 798         callback(relative_path);
 799
 800         struct dirent *de = NULL;
 801         while((de = readdir(dir))) {
 802                 if(de->d_type == DT_DIR
 803                         && (
 804                                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 805                                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 806                                 ))
 807                         continue;
 808
 809                 debug(D_CGROUP, "examining '%s/%s'", this, de->d_name);
 810
 811                 if(de->d_type == DT_DIR) {
 812                         if(enabled == -1) {
 813                                 const char *r = relative_path;
 814                                 if(*r == '\0') r = "/";
 815                                 else if (*r == '/') r++;
 816
 817                                 // we check for this option here
 818                                 // so that the config will not have settings
 819                                 // for leaf directories
 820                                 char option[FILENAME_MAX + 1];
 821                                 snprintf(option, FILENAME_MAX, "search for cgroups under %s", r);
 822                                 option[FILENAME_MAX] = '\0';
 823                                 enabled = config_get_boolean("plugin:cgroups", option, 1);
 824                         }
 825
 826                         if(enabled) {
 827                                 char *s = malloc(dirlen + strlen(de->d_name) + 2);
 828                                 if(s) {
 829                                         strcpy(s, this);
 830                                         strcat(s, "/");
 831                                         strcat(s, de->d_name);
 832                                         find_dir_in_subdirs(base, s, callback);
 833                                         free(s);
 834                                 }
 835                         }
 836                 }
 837         }
 838
 839         closedir(dir);
 840 }
 841
 842 void mark_all_cgroups_as_not_available() {
 843         debug(D_CGROUP, "marking all cgroups as not available");
 844
 845         struct cgroup *cg;
 846
 847         // mark all as not available
 848         for(cg = cgroup_root; cg ; cg = cg->next)
 849                 cg->available = 0;
 850 }
 851
 852 void cleanup_all_cgroups() {
 853         struct cgroup *cg = cgroup_root, *last = NULL;
 854
 855         for(; cg ;) {
 856                 if(!cg->available) {
 857
 858                         if(!last)
 859                                 cgroup_root = cg->next;
 860                         else
 861                                 last->next = cg->next;
 862
 863                         cgroup_free(cg);
 864
 865                         if(!last)
 866                                 cg = cgroup_root;
 867                         else
 868                                 cg = last->next;
 869                 }
 870                 else {
 871                         last = cg;
 872                         cg = cg->next;
 873                 }
 874         }
 875 }
 876
 877 void find_all_cgroups() {
 878         debug(D_CGROUP, "searching for cgroups");
 879
 880         mark_all_cgroups_as_not_available();
 881
 882         if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage)
 883                 find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir);
 884
 885         if(cgroup_enable_blkio)
 886                 find_dir_in_subdirs(cgroup_blkio_base, NULL, found_subdir_in_dir);
 887
 888         if(cgroup_enable_memory)
 889                 find_dir_in_subdirs(cgroup_memory_base, NULL, found_subdir_in_dir);
 890
 891         // remove any non-existing cgroups
 892         cleanup_all_cgroups();
 893
 894         struct cgroup *cg;
 895         for(cg = cgroup_root; cg ; cg = cg->next) {
 896                 // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
 897
 898                 if(unlikely(!cg->available))
 899                         continue;
 900
 901                 debug(D_CGROUP, "checking paths for cgroup '%s'", cg->id);
 902
 903                 // check for newly added cgroups
 904                 // and update the filenames they read
 905                 char filename[FILENAME_MAX + 1];
 906                 if(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename) {
 907                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
 908                         cg->cpuacct_stat.filename = strdup(filename);
 909                         debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
 910                 }
 911                 if(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename) {
 912                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
 913                         cg->cpuacct_usage.filename = strdup(filename);
 914                         debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
 915                 }
 916                 if(cgroup_enable_memory && !cg->memory.filename) {
 917                         snprintf(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
 918                         cg->memory.filename = strdup(filename);
 919                         debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename);
 920                 }
 921                 if(cgroup_enable_blkio) {
 922                         if(!cg->io_service_bytes.filename) {
 923                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
 924                                 cg->io_service_bytes.filename = strdup(filename);
 925                                 debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
 926                         }
 927                         if(!cg->io_serviced.filename) {
 928                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
 929                                 cg->io_serviced.filename = strdup(filename);
 930                                 debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
 931                         }
 932                         if(!cg->throttle_io_service_bytes.filename) {
 933                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
 934                                 cg->throttle_io_service_bytes.filename = strdup(filename);
 935                                 debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
 936                         }
 937                         if(!cg->throttle_io_serviced.filename) {
 938                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
 939                                 cg->throttle_io_serviced.filename = strdup(filename);
 940                                 debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
 941                         }
 942                         if(!cg->io_merged.filename) {
 943                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
 944                                 cg->io_merged.filename = strdup(filename);
 945                                 debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
 946                         }
 947                         if(!cg->io_queued.filename) {
 948                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
 949                                 cg->io_queued.filename = strdup(filename);
 950                                 debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
 951                         }
 952                 }
 953         }
 954
 955         debug(D_CGROUP, "done searching for cgroups");
 956         return;
 957 }
 958
 959 // ----------------------------------------------------------------------------
 960 // generate charts
 961
 962 #define CHART_TITLE_MAX 300
 963
 964 void update_cgroup_charts(int update_every) {
 965         debug(D_CGROUP, "updating cgroups charts");
 966
 967         char type[RRD_ID_LENGTH_MAX + 1];
 968         char title[CHART_TITLE_MAX + 1];
 969
 970         struct cgroup *cg;
 971         RRDSET *st;
 972
 973         for(cg = cgroup_root; cg ; cg = cg->next) {
 974                 if(!cg->available || !cg->enabled)
 975                         continue;
 976
 977                 if(cg->id[0] == '\0')
 978                         strcpy(type, "cgroup_root");
 979                 else if(cg->id[0] == '/')
 980                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
 981                 else
 982                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
 983
 984                 netdata_fix_chart_id(type);
 985
 986                 if(cg->cpuacct_stat.updated) {
 987                         st = rrdset_find_bytype(type, "cpu");
 988                         if(!st) {
 989                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->chart_title);
 990                                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
 991
 992                                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
 993                                 rrddim_add(st, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
 994                         }
 995                         else rrdset_next(st);
 996
 997                         rrddim_set(st, "user", cg->cpuacct_stat.user);
 998                         rrddim_set(st, "system", cg->cpuacct_stat.system);
 999                         rrdset_done(st);
1000                 }
1001
1002                 if(cg->cpuacct_usage.updated) {
1003                         char id[RRD_ID_LENGTH_MAX + 1];
1004                         unsigned int i;
1005
1006                         st = rrdset_find_bytype(type, "cpu_per_core");
1007                         if(!st) {
1008                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->chart_title);
1009                                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
1010
1011                                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
1012                                         snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
1013                                         rrddim_add(st, id, NULL, 100, 1000000, RRDDIM_INCREMENTAL);
1014                                 }
1015                         }
1016                         else rrdset_next(st);
1017
1018                         for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
1019                                 snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
1020                                 rrddim_set(st, id, cg->cpuacct_usage.cpu_percpu[i]);
1021                         }
1022                         rrdset_done(st);
1023                 }
1024
1025                 if(cg->memory.updated) {
1026                         if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
1027                                 st = rrdset_find_bytype(type, "mem");
1028                                 if(!st) {
1029                                         snprintf(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->chart_title);
1030                                         st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
1031                                                            RRDSET_TYPE_STACKED);
1032
1033                                         rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1034                                         rrddim_add(st, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1035                                         if(cg->memory.has_dirty_swap)
1036                                                 rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1037                                         rrddim_add(st, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1038                                         rrddim_add(st, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1039                                 }
1040                                 else rrdset_next(st);
1041
1042                                 rrddim_set(st, "cache", cg->memory.cache);
1043                                 rrddim_set(st, "rss", cg->memory.rss);
1044                                 if(cg->memory.has_dirty_swap)
1045                                         rrddim_set(st, "swap", cg->memory.swap);
1046                                 rrddim_set(st, "rss_huge", cg->memory.rss_huge);
1047                                 rrddim_set(st, "mapped_file", cg->memory.mapped_file);
1048                                 rrdset_done(st);
1049                         }
1050
1051                         st = rrdset_find_bytype(type, "writeback");
1052                         if(!st) {
1053                                 snprintf(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->chart_title);
1054                                 st = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300,
1055                                                    update_every, RRDSET_TYPE_AREA);
1056
1057                                 if(cg->memory.has_dirty_swap)
1058                                         rrddim_add(st, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1059                                 rrddim_add(st, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1060                         }
1061                         else rrdset_next(st);
1062
1063                         if(cg->memory.has_dirty_swap)
1064                                 rrddim_set(st, "dirty", cg->memory.dirty);
1065                         rrddim_set(st, "writeback", cg->memory.writeback);
1066                         rrdset_done(st);
1067
1068                         if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
1069                                 st = rrdset_find_bytype(type, "mem_activity");
1070                                 if(!st) {
1071                                         snprintf(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_title);
1072                                         st = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s",
1073                                                            40400, update_every, RRDSET_TYPE_LINE);
1074
1075                                         rrddim_add(st, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1076                                         rrddim_add(st, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1077                                 }
1078                                 else rrdset_next(st);
1079
1080                                 rrddim_set(st, "pgpgin", cg->memory.pgpgin);
1081                                 rrddim_set(st, "pgpgout", cg->memory.pgpgout);
1082                                 rrdset_done(st);
1083                         }
1084
1085                         if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
1086                                 st = rrdset_find_bytype(type, "pgfaults");
1087                                 if(!st) {
1088                                         snprintf(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->chart_title);
1089                                         st = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500,
1090                                                            update_every, RRDSET_TYPE_LINE);
1091
1092                                         rrddim_add(st, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1093                                         rrddim_add(st, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1094                                 }
1095                                 else rrdset_next(st);
1096
1097                                 rrddim_set(st, "pgfault", cg->memory.pgfault);
1098                                 rrddim_set(st, "pgmajfault", cg->memory.pgmajfault);
1099                                 rrdset_done(st);
1100                         }
1101                 }
1102
1103                 if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
1104                         st = rrdset_find_bytype(type, "io");
1105                         if(!st) {
1106                                 snprintf(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1107                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1108                                                    update_every, RRDSET_TYPE_LINE);
1109
1110                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1111                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1112                         }
1113                         else rrdset_next(st);
1114
1115                         rrddim_set(st, "read", cg->io_service_bytes.Read);
1116                         rrddim_set(st, "write", cg->io_service_bytes.Write);
1117                         rrdset_done(st);
1118                 }
1119
1120                 if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
1121                         st = rrdset_find_bytype(type, "serviced_ops");
1122                         if(!st) {
1123                                 snprintf(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s", cg->chart_title);
1124                                 st = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200,
1125                                                    update_every, RRDSET_TYPE_LINE);
1126
1127                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1128                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1129                         }
1130                         else rrdset_next(st);
1131
1132                         rrddim_set(st, "read", cg->io_serviced.Read);
1133                         rrddim_set(st, "write", cg->io_serviced.Write);
1134                         rrdset_done(st);
1135                 }
1136
1137                 if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
1138                         st = rrdset_find_bytype(type, "io");
1139                         if(!st) {
1140                                 snprintf(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1141                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1142                                                    update_every, RRDSET_TYPE_LINE);
1143
1144                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1145                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1146                         }
1147                         else rrdset_next(st);
1148
1149                         rrddim_set(st, "read", cg->throttle_io_service_bytes.Read);
1150                         rrddim_set(st, "write", cg->throttle_io_service_bytes.Write);
1151                         rrdset_done(st);
1152                 }
1153
1154
1155                 if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
1156                         st = rrdset_find_bytype(type, "throttle_serviced_ops");
1157                         if(!st) {
1158                                 snprintf(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->chart_title);
1159                                 st = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200,
1160                                                    update_every, RRDSET_TYPE_LINE);
1161
1162                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1163                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1164                         }
1165                         else rrdset_next(st);
1166
1167                         rrddim_set(st, "read", cg->throttle_io_serviced.Read);
1168                         rrddim_set(st, "write", cg->throttle_io_serviced.Write);
1169                         rrdset_done(st);
1170                 }
1171
1172                 if(cg->io_queued.updated) {
1173                         st = rrdset_find_bytype(type, "queued_ops");
1174                         if(!st) {
1175                                 snprintf(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->chart_title);
1176                                 st = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000,
1177                                                    update_every, RRDSET_TYPE_LINE);
1178
1179                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1180                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1181                         }
1182                         else rrdset_next(st);
1183
1184                         rrddim_set(st, "read", cg->io_queued.Read);
1185                         rrddim_set(st, "write", cg->io_queued.Write);
1186                         rrdset_done(st);
1187                 }
1188
1189                 if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1190                         st = rrdset_find_bytype(type, "merged_ops");
1191                         if(!st) {
1192                                 snprintf(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->chart_title);
1193                                 st = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100,
1194                                                    update_every, RRDSET_TYPE_LINE);
1195
1196                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1197                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1198                         }
1199                         else rrdset_next(st);
1200
1201                         rrddim_set(st, "read", cg->io_merged.Read);
1202                         rrddim_set(st, "write", cg->io_merged.Write);
1203                         rrdset_done(st);
1204                 }
1205         }
1206
1207         debug(D_CGROUP, "done updating cgroups charts");
1208 }
1209
1210 // ----------------------------------------------------------------------------
1211 // cgroups main
1212
1213 int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
1214         static int cgroup_global_config_read = 0;
1215         static time_t last_run = 0;
1216         time_t now = time(NULL);
1217
1218         if(dt) {};
1219
1220         if(unlikely(!cgroup_global_config_read)) {
1221                 read_cgroup_plugin_configuration();
1222                 cgroup_global_config_read = 1;
1223         }
1224
1225         if(unlikely(cgroup_enable_new_cgroups_detected_at_runtime && now - last_run > cgroup_check_for_new_every)) {
1226                 find_all_cgroups();
1227                 last_run = now;
1228         }
1229
1230         read_all_cgroups(cgroup_root);
1231         update_cgroup_charts(update_every);
1232
1233         return 0;
1234 }
1235
1236 void *cgroups_main(void *ptr)
1237 {
1238         if(ptr) { ; }
1239
1240         info("CGROUP Plugin thread created with task id %d", gettid());
1241
1242         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1243                 error("Cannot set pthread cancel type to DEFERRED.");
1244
1245         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1246                 error("Cannot set pthread cancel state to ENABLE.");
1247
1248         struct rusage thread;
1249
1250         // when ZERO, attempt to do it
1251         int vdo_sys_fs_cgroup                   = 0;
1252         int vdo_cpu_netdata                     = !config_get_boolean("plugin:cgroups", "cgroups plugin resources", 1);
1253
1254         // keep track of the time each module was called
1255         unsigned long long sutime_sys_fs_cgroup = 0ULL;
1256
1257         // the next time we will run - aligned properly
1258         unsigned long long sunext = (time(NULL) - (time(NULL) % rrd_update_every) + rrd_update_every) * 1000000ULL;
1259         unsigned long long sunow;
1260
1261         RRDSET *stcpu_thread = NULL;
1262
1263         for(;1;) {
1264                 if(unlikely(netdata_exit)) break;
1265
1266                 // delay until it is our time to run
1267                 while((sunow = timems()) < sunext)
1268                         usleep((useconds_t)(sunext - sunow));
1269
1270                 // find the next time we need to run
1271                 while(timems() > sunext)
1272                         sunext += rrd_update_every * 1000000ULL;
1273
1274                 if(unlikely(netdata_exit)) break;
1275
1276                 // BEGIN -- the job to be done
1277
1278                 if(!vdo_sys_fs_cgroup) {
1279                         debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_sys_fs_cgroup().");
1280                         sunow = timems();
1281                         vdo_sys_fs_cgroup = do_sys_fs_cgroup(rrd_update_every, (sutime_sys_fs_cgroup > 0)?sunow - sutime_sys_fs_cgroup:0ULL);
1282                         sutime_sys_fs_cgroup = sunow;
1283                 }
1284                 if(unlikely(netdata_exit)) break;
1285
1286                 // END -- the job is done
1287
1288                 // --------------------------------------------------------------------
1289
1290                 if(!vdo_cpu_netdata) {
1291                         getrusage(RUSAGE_THREAD, &thread);
1292
1293                         if(!stcpu_thread) stcpu_thread = rrdset_find("netdata.plugin_cgroups_cpu");
1294                         if(!stcpu_thread) {
1295                                 stcpu_thread = rrdset_create("netdata", "plugin_cgroups_cpu", NULL, "proc.internal", NULL, "NetData CGroups Plugin CPU usage", "milliseconds/s", 132000, rrd_update_every, RRDSET_TYPE_STACKED);
1296
1297                                 rrddim_add(stcpu_thread, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
1298                                 rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
1299                         }
1300                         else rrdset_next(stcpu_thread);
1301
1302                         rrddim_set(stcpu_thread, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
1303                         rrddim_set(stcpu_thread, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
1304                         rrdset_done(stcpu_thread);
1305                 }
1306         }
1307
1308         pthread_exit(NULL);
1309         return NULL;
1310 }