src/sys_fs_cgroup.c

   1 #include "common.h"
   2
   3 // ----------------------------------------------------------------------------
   4 // cgroup globals
   5
   6 static int cgroup_enable_cpuacct_stat = CONFIG_ONDEMAND_ONDEMAND;
   7 static int cgroup_enable_cpuacct_usage = CONFIG_ONDEMAND_ONDEMAND;
   8 static int cgroup_enable_memory = CONFIG_ONDEMAND_ONDEMAND;
   9 static int cgroup_enable_devices = CONFIG_ONDEMAND_ONDEMAND;
  10 static int cgroup_enable_blkio = CONFIG_ONDEMAND_ONDEMAND;
  11 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
  12 static int cgroup_check_for_new_every = 10;
  13 static char *cgroup_cpuacct_base = NULL;
  14 static char *cgroup_blkio_base = NULL;
  15 static char *cgroup_memory_base = NULL;
  16 static char *cgroup_devices_base = NULL;
  17
  18 static int cgroup_root_count = 0;
  19 static int cgroup_root_max = 500;
  20 static int cgroup_max_depth = 0;
  21
  22 void read_cgroup_plugin_configuration() {
  23     cgroup_check_for_new_every = config_get_number("plugin:cgroups", "check for new cgroups every", cgroup_check_for_new_every);
  24
  25     cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat", cgroup_enable_cpuacct_stat);
  26     cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage", cgroup_enable_cpuacct_usage);
  27     cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory", cgroup_enable_memory);
  28     cgroup_enable_blkio = config_get_boolean_ondemand("plugin:cgroups", "enable blkio", cgroup_enable_blkio);
  29
  30     char filename[FILENAME_MAX + 1], *s;
  31     struct mountinfo *mi, *root = mountinfo_read();
  32
  33     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
  34     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
  35     if(!mi) {
  36         error("Cannot find cgroup cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
  37         s = "/sys/fs/cgroup/cpuacct";
  38     }
  39     else s = mi->mount_point;
  40     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  41     cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
  42
  43     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
  44     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
  45     if(!mi) {
  46         error("Cannot find cgroup blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
  47         s = "/sys/fs/cgroup/blkio";
  48     }
  49     else s = mi->mount_point;
  50     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  51     cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
  52
  53     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
  54     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
  55     if(!mi) {
  56         error("Cannot find cgroup memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
  57         s = "/sys/fs/cgroup/memory";
  58     }
  59     else s = mi->mount_point;
  60     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  61     cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
  62
  63     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
  64     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
  65     if(!mi) {
  66         error("Cannot find cgroup devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
  67         s = "/sys/fs/cgroup/devices";
  68     }
  69     else s = mi->mount_point;
  70     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  71     cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", filename);
  72
  73     cgroup_root_max = config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
  74     cgroup_max_depth = config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
  75
  76     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);
  77
  78     mountinfo_free(root);
  79 }
  80
  81 // ----------------------------------------------------------------------------
  82 // cgroup objects
  83
  84 struct blkio {
  85     int updated;
  86
  87     char *filename;
  88
  89     unsigned long long Read;
  90     unsigned long long Write;
  91 /*
  92     unsigned long long Sync;
  93     unsigned long long Async;
  94     unsigned long long Total;
  95 */
  96 };
  97
  98 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
  99 struct memory {
 100     int updated;
 101
 102     char *filename;
 103
 104     int has_dirty_swap;
 105
 106     unsigned long long cache;
 107     unsigned long long rss;
 108     unsigned long long rss_huge;
 109     unsigned long long mapped_file;
 110     unsigned long long writeback;
 111     unsigned long long dirty;
 112     unsigned long long swap;
 113     unsigned long long pgpgin;
 114     unsigned long long pgpgout;
 115     unsigned long long pgfault;
 116     unsigned long long pgmajfault;
 117 /*
 118     unsigned long long inactive_anon;
 119     unsigned long long active_anon;
 120     unsigned long long inactive_file;
 121     unsigned long long active_file;
 122     unsigned long long unevictable;
 123     unsigned long long hierarchical_memory_limit;
 124     unsigned long long total_cache;
 125     unsigned long long total_rss;
 126     unsigned long long total_rss_huge;
 127     unsigned long long total_mapped_file;
 128     unsigned long long total_writeback;
 129     unsigned long long total_dirty;
 130     unsigned long long total_swap;
 131     unsigned long long total_pgpgin;
 132     unsigned long long total_pgpgout;
 133     unsigned long long total_pgfault;
 134     unsigned long long total_pgmajfault;
 135     unsigned long long total_inactive_anon;
 136     unsigned long long total_active_anon;
 137     unsigned long long total_inactive_file;
 138     unsigned long long total_active_file;
 139     unsigned long long total_unevictable;
 140 */
 141 };
 142
 143 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 144 struct cpuacct_stat {
 145     int updated;
 146
 147     char *filename;
 148
 149     unsigned long long user;
 150     unsigned long long system;
 151 };
 152
 153 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 154 struct cpuacct_usage {
 155     int updated;
 156
 157     char *filename;
 158
 159     unsigned int cpus;
 160     unsigned long long *cpu_percpu;
 161 };
 162
 163 struct cgroup {
 164     int available;      // found in the filesystem
 165     int enabled;        // enabled in the config
 166
 167     char *id;
 168     uint32_t hash;
 169
 170     char *chart_id;
 171     uint32_t hash_chart;
 172
 173     char *chart_title;
 174
 175     struct cpuacct_stat cpuacct_stat;
 176     struct cpuacct_usage cpuacct_usage;
 177
 178     struct memory memory;
 179
 180     struct blkio io_service_bytes;              // bytes
 181     struct blkio io_serviced;                   // operations
 182
 183     struct blkio throttle_io_service_bytes;     // bytes
 184     struct blkio throttle_io_serviced;          // operations
 185
 186     struct blkio io_merged;                     // operations
 187     struct blkio io_queued;                     // operations
 188
 189     struct cgroup *next;
 190
 191 } *cgroup_root = NULL;
 192
 193 // ----------------------------------------------------------------------------
 194 // read values from /sys
 195
 196 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 197     static procfile *ff = NULL;
 198
 199     static uint32_t user_hash = 0;
 200     static uint32_t system_hash = 0;
 201
 202     if(unlikely(user_hash == 0)) {
 203         user_hash = simple_hash("user");
 204         system_hash = simple_hash("system");
 205     }
 206
 207     cp->updated = 0;
 208     if(cp->filename) {
 209         ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 210         if(!ff) return;
 211
 212         ff = procfile_readall(ff);
 213         if(!ff) return;
 214
 215         unsigned long i, lines = procfile_lines(ff);
 216
 217         if(lines < 1) {
 218             error("File '%s' should have 1+ lines.", cp->filename);
 219             return;
 220         }
 221
 222         for(i = 0; i < lines ; i++) {
 223             char *s = procfile_lineword(ff, i, 0);
 224             uint32_t hash = simple_hash(s);
 225
 226             if(hash == user_hash && !strcmp(s, "user"))
 227                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 228
 229             else if(hash == system_hash && !strcmp(s, "system"))
 230                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 231         }
 232
 233         cp->updated = 1;
 234
 235         // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 236     }
 237 }
 238
 239 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 240     static procfile *ff = NULL;
 241
 242     ca->updated = 0;
 243     if(ca->filename) {
 244         ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 245         if(!ff) return;
 246
 247         ff = procfile_readall(ff);
 248         if(!ff) return;
 249
 250         if(procfile_lines(ff) < 1) {
 251             error("File '%s' should have 1+ lines but has %u.", ca->filename, procfile_lines(ff));
 252             return;
 253         }
 254
 255         unsigned long i = procfile_linewords(ff, 0);
 256         if(i <= 0) return;
 257
 258         // we may have 1 more CPU reported
 259         while(i > 0) {
 260             char *s = procfile_lineword(ff, 0, i - 1);
 261             if(!*s) i--;
 262             else break;
 263         }
 264
 265         if(i != ca->cpus) {
 266             freez(ca->cpu_percpu);
 267             ca->cpu_percpu = mallocz(sizeof(unsigned long long) * i);
 268             ca->cpus = (unsigned int)i;
 269         }
 270
 271         for(i = 0; i < ca->cpus ;i++) {
 272             ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 273             // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 274         }
 275
 276         ca->updated = 1;
 277     }
 278 }
 279
 280 void cgroup_read_blkio(struct blkio *io) {
 281     static procfile *ff = NULL;
 282
 283     static uint32_t Read_hash = 0;
 284     static uint32_t Write_hash = 0;
 285 /*
 286     static uint32_t Sync_hash = 0;
 287     static uint32_t Async_hash = 0;
 288     static uint32_t Total_hash = 0;
 289 */
 290
 291     if(unlikely(Read_hash == 0)) {
 292         Read_hash = simple_hash("Read");
 293         Write_hash = simple_hash("Write");
 294 /*
 295         Sync_hash = simple_hash("Sync");
 296         Async_hash = simple_hash("Async");
 297         Total_hash = simple_hash("Total");
 298 */
 299     }
 300
 301     io->updated = 0;
 302     if(io->filename) {
 303         ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 304         if(!ff) return;
 305
 306         ff = procfile_readall(ff);
 307         if(!ff) return;
 308
 309         unsigned long i, lines = procfile_lines(ff);
 310
 311         if(lines < 1) {
 312             error("File '%s' should have 1+ lines.", io->filename);
 313             return;
 314         }
 315
 316         io->Read = 0;
 317         io->Write = 0;
 318 /*
 319         io->Sync = 0;
 320         io->Async = 0;
 321         io->Total = 0;
 322 */
 323
 324         for(i = 0; i < lines ; i++) {
 325             char *s = procfile_lineword(ff, i, 1);
 326             uint32_t hash = simple_hash(s);
 327
 328             if(hash == Read_hash && !strcmp(s, "Read"))
 329                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 330
 331             else if(hash == Write_hash && !strcmp(s, "Write"))
 332                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 333
 334 /*
 335             else if(hash == Sync_hash && !strcmp(s, "Sync"))
 336                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 337
 338             else if(hash == Async_hash && !strcmp(s, "Async"))
 339                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 340
 341             else if(hash == Total_hash && !strcmp(s, "Total"))
 342                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 343 */
 344         }
 345
 346         io->updated = 1;
 347         // 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);
 348     }
 349 }
 350
 351 void cgroup_read_memory(struct memory *mem) {
 352     static procfile *ff = NULL;
 353
 354     static uint32_t cache_hash = 0;
 355     static uint32_t rss_hash = 0;
 356     static uint32_t rss_huge_hash = 0;
 357     static uint32_t mapped_file_hash = 0;
 358     static uint32_t writeback_hash = 0;
 359     static uint32_t dirty_hash = 0;
 360     static uint32_t swap_hash = 0;
 361     static uint32_t pgpgin_hash = 0;
 362     static uint32_t pgpgout_hash = 0;
 363     static uint32_t pgfault_hash = 0;
 364     static uint32_t pgmajfault_hash = 0;
 365 /*
 366     static uint32_t inactive_anon_hash = 0;
 367     static uint32_t active_anon_hash = 0;
 368     static uint32_t inactive_file_hash = 0;
 369     static uint32_t active_file_hash = 0;
 370     static uint32_t unevictable_hash = 0;
 371     static uint32_t hierarchical_memory_limit_hash = 0;
 372     static uint32_t total_cache_hash = 0;
 373     static uint32_t total_rss_hash = 0;
 374     static uint32_t total_rss_huge_hash = 0;
 375     static uint32_t total_mapped_file_hash = 0;
 376     static uint32_t total_writeback_hash = 0;
 377     static uint32_t total_dirty_hash = 0;
 378     static uint32_t total_swap_hash = 0;
 379     static uint32_t total_pgpgin_hash = 0;
 380     static uint32_t total_pgpgout_hash = 0;
 381     static uint32_t total_pgfault_hash = 0;
 382     static uint32_t total_pgmajfault_hash = 0;
 383     static uint32_t total_inactive_anon_hash = 0;
 384     static uint32_t total_active_anon_hash = 0;
 385     static uint32_t total_inactive_file_hash = 0;
 386     static uint32_t total_active_file_hash = 0;
 387     static uint32_t total_unevictable_hash = 0;
 388 */
 389     if(unlikely(cache_hash == 0)) {
 390         cache_hash = simple_hash("cache");
 391         rss_hash = simple_hash("rss");
 392         rss_huge_hash = simple_hash("rss_huge");
 393         mapped_file_hash = simple_hash("mapped_file");
 394         writeback_hash = simple_hash("writeback");
 395         dirty_hash = simple_hash("dirty");
 396         swap_hash = simple_hash("swap");
 397         pgpgin_hash = simple_hash("pgpgin");
 398         pgpgout_hash = simple_hash("pgpgout");
 399         pgfault_hash = simple_hash("pgfault");
 400         pgmajfault_hash = simple_hash("pgmajfault");
 401 /*
 402         inactive_anon_hash = simple_hash("inactive_anon");
 403         active_anon_hash = simple_hash("active_anon");
 404         inactive_file_hash = simple_hash("inactive_file");
 405         active_file_hash = simple_hash("active_file");
 406         unevictable_hash = simple_hash("unevictable");
 407         hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 408         total_cache_hash = simple_hash("total_cache");
 409         total_rss_hash = simple_hash("total_rss");
 410         total_rss_huge_hash = simple_hash("total_rss_huge");
 411         total_mapped_file_hash = simple_hash("total_mapped_file");
 412         total_writeback_hash = simple_hash("total_writeback");
 413         total_dirty_hash = simple_hash("total_dirty");
 414         total_swap_hash = simple_hash("total_swap");
 415         total_pgpgin_hash = simple_hash("total_pgpgin");
 416         total_pgpgout_hash = simple_hash("total_pgpgout");
 417         total_pgfault_hash = simple_hash("total_pgfault");
 418         total_pgmajfault_hash = simple_hash("total_pgmajfault");
 419         total_inactive_anon_hash = simple_hash("total_inactive_anon");
 420         total_active_anon_hash = simple_hash("total_active_anon");
 421         total_inactive_file_hash = simple_hash("total_inactive_file");
 422         total_active_file_hash = simple_hash("total_active_file");
 423         total_unevictable_hash = simple_hash("total_unevictable");
 424 */
 425     }
 426
 427     mem->updated = 0;
 428     if(mem->filename) {
 429         ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 430         if(!ff) return;
 431
 432         ff = procfile_readall(ff);
 433         if(!ff) return;
 434
 435         unsigned long i, lines = procfile_lines(ff);
 436
 437         if(lines < 1) {
 438             error("File '%s' should have 1+ lines.", mem->filename);
 439             return;
 440         }
 441
 442         for(i = 0; i < lines ; i++) {
 443             char *s = procfile_lineword(ff, i, 0);
 444             uint32_t hash = simple_hash(s);
 445
 446             if(hash == cache_hash && !strcmp(s, "cache"))
 447                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 448
 449             else if(hash == rss_hash && !strcmp(s, "rss"))
 450                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 451
 452             else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 453                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 454
 455             else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 456                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 457
 458             else if(hash == writeback_hash && !strcmp(s, "writeback"))
 459                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 460
 461             else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 462                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 463                 mem->has_dirty_swap = 1;
 464             }
 465
 466             else if(hash == swap_hash && !strcmp(s, "swap")) {
 467                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 468                 mem->has_dirty_swap = 1;
 469             }
 470
 471             else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 472                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 473
 474             else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 475                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 476
 477             else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 478                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 479
 480             else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 481                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 482
 483 /*
 484             else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 485                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 486
 487             else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 488                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 489
 490             else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 491                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 492
 493             else if(hash == active_file_hash && !strcmp(s, "active_file"))
 494                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 495
 496             else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 497                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 498
 499             else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 500                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 501
 502             else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 503                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 504
 505             else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 506                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 507
 508             else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 509                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 510
 511             else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 512                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 513
 514             else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 515                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 516
 517             else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 518                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 519
 520             else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 521                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 522
 523             else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 524                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 525
 526             else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 527                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 528
 529             else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 530                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 531
 532             else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 533                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 534
 535             else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 536                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 537
 538             else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 539                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 540
 541             else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 542                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 543
 544             else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 545                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 546
 547             else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 548                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 549 */
 550         }
 551
 552         // 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);
 553
 554         mem->updated = 1;
 555     }
 556 }
 557
 558 void cgroup_read(struct cgroup *cg) {
 559     debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
 560
 561     cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 562     cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 563     cgroup_read_memory(&cg->memory);
 564     cgroup_read_blkio(&cg->io_service_bytes);
 565     cgroup_read_blkio(&cg->io_serviced);
 566     cgroup_read_blkio(&cg->throttle_io_service_bytes);
 567     cgroup_read_blkio(&cg->throttle_io_serviced);
 568     cgroup_read_blkio(&cg->io_merged);
 569     cgroup_read_blkio(&cg->io_queued);
 570 }
 571
 572 void read_all_cgroups(struct cgroup *root) {
 573     debug(D_CGROUP, "reading metrics for all cgroups");
 574
 575     struct cgroup *cg;
 576
 577     for(cg = root; cg ; cg = cg->next)
 578         if(cg->enabled && cg->available)
 579             cgroup_read(cg);
 580 }
 581
 582 // ----------------------------------------------------------------------------
 583 // add/remove/find cgroup objects
 584
 585 #define CGROUP_CHARTID_LINE_MAX 1024
 586
 587 void cgroup_get_chart_id(struct cgroup *cg) {
 588     debug(D_CGROUP, "getting the name of cgroup '%s'", cg->id);
 589
 590     pid_t cgroup_pid;
 591     char buffer[CGROUP_CHARTID_LINE_MAX + 1];
 592
 593     snprintfz(buffer, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'",
 594              config_get("plugin:cgroups", "script to get cgroup names", PLUGINS_DIR "/cgroup-name.sh"), cg->chart_id);
 595
 596     debug(D_CGROUP, "executing command '%s' for cgroup '%s'", buffer, cg->id);
 597     FILE *fp = mypopen(buffer, &cgroup_pid);
 598     if(!fp) {
 599         error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
 600         return;
 601     }
 602     debug(D_CGROUP, "reading from command '%s' for cgroup '%s'", buffer, cg->id);
 603     char *s = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp);
 604     debug(D_CGROUP, "closing command for cgroup '%s'", cg->id);
 605     mypclose(fp, cgroup_pid);
 606     debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
 607
 608     if(s && *s && *s != '\n') {
 609         debug(D_CGROUP, "cgroup '%s' should be renamed to '%s'", cg->id, s);
 610
 611         trim(s);
 612
 613         freez(cg->chart_title);
 614         cg->chart_title = strdupz(s);
 615         netdata_fix_chart_name(cg->chart_title);
 616
 617         freez(cg->chart_id);
 618         cg->chart_id = strdupz(s);
 619         netdata_fix_chart_id(cg->chart_id);
 620         cg->hash_chart = simple_hash(cg->chart_id);
 621
 622         debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
 623     }
 624     else debug(D_CGROUP, "cgroup '%s' is not to be renamed (will be shown as '%s')", cg->id, cg->chart_id);
 625 }
 626
 627 struct cgroup *cgroup_add(const char *id) {
 628     debug(D_CGROUP, "adding cgroup '%s'", id);
 629
 630     if(cgroup_root_count >= cgroup_root_max) {
 631         info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 632         return NULL;
 633     }
 634
 635     int def = cgroup_enable_new_cgroups_detected_at_runtime;
 636     const char *chart_id = id;
 637     if(!*chart_id) {
 638         chart_id = "/";
 639
 640         // disable by default the root cgroup
 641         def = 0;
 642         debug(D_CGROUP, "cgroup '%s' is the root container (by default %s)", id, (def)?"enabled":"disabled");
 643     }
 644     else {
 645         if(*chart_id == '/') chart_id++;
 646
 647         size_t len = strlen(chart_id);
 648
 649         // disable by default the parent cgroup
 650         // for known cgroup managers
 651         if(!strcmp(chart_id, "lxc") ||
 652                 !strcmp(chart_id, "docker") ||
 653                 !strcmp(chart_id, "libvirt") ||
 654                 !strcmp(chart_id, "qemu") ||
 655                 !strcmp(chart_id, "systemd") ||
 656                 !strcmp(chart_id, "system.slice") ||
 657                 !strcmp(chart_id, "machine.slice") ||
 658                 !strcmp(chart_id, "init.scope") ||
 659                 !strcmp(chart_id, "user") ||
 660                 !strcmp(chart_id, "system") ||
 661                 !strcmp(chart_id, "machine") ||
 662                 // starts with them
 663                 (len >  6 && !strncmp(chart_id, "user/", 6)) ||
 664                 (len > 11 && !strncmp(chart_id, "user.slice/", 11)) ||
 665                 // ends with them
 666                 (len >  5 && !strncmp(&chart_id[len -  5], ".user", 5)) ||
 667                 (len >  5 && !strncmp(&chart_id[len -  5], ".swap", 5)) ||
 668                 (len >  6 && !strncmp(&chart_id[len -  6], ".slice", 6)) ||
 669                 (len >  6 && !strncmp(&chart_id[len -  6], ".mount", 6)) ||
 670                 (len >  8 && !strncmp(&chart_id[len -  8], ".session", 8)) ||
 671                 (len >  8 && !strncmp(&chart_id[len -  8], ".service", 8)) ||
 672                 (len > 10 && !strncmp(&chart_id[len - 10], ".partition", 10))
 673                 ) {
 674             def = 0;
 675             debug(D_CGROUP, "cgroup '%s' is %s (by default)", id, (def)?"enabled":"disabled");
 676         }
 677     }
 678
 679     struct cgroup *cg = callocz(1, sizeof(struct cgroup));
 680
 681     cg->id = strdupz(id);
 682     cg->hash = simple_hash(cg->id);
 683
 684     cg->chart_id = strdupz(chart_id);
 685     netdata_fix_chart_id(cg->chart_id);
 686     cg->hash_chart = simple_hash(cg->chart_id);
 687
 688     cg->chart_title = strdupz(chart_id);
 689
 690     if(!cgroup_root)
 691         cgroup_root = cg;
 692     else {
 693         // append it
 694         struct cgroup *e;
 695         for(e = cgroup_root; e->next ;e = e->next) ;
 696         e->next = cg;
 697     }
 698
 699     cgroup_root_count++;
 700
 701     // fix the name by calling the external script
 702     cgroup_get_chart_id(cg);
 703
 704     debug(D_CGROUP, "adding cgroup '%s' with chart id '%s'", id, chart_id);
 705
 706     char option[FILENAME_MAX + 1];
 707     snprintfz(option, FILENAME_MAX, "enable cgroup %s", cg->chart_title);
 708     cg->enabled = config_get_boolean("plugin:cgroups", option, def);
 709
 710     if(cg->enabled) {
 711         struct cgroup *t;
 712         for (t = cgroup_root; t; t = t->next) {
 713             if (t != cg && t->enabled && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_id)) {
 714                 if (!strncmp(t->chart_id, "/system.slice/", 14) && !strncmp(cg->chart_id, "/init.scope/system.slice/", 25)) {
 715                     error("Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
 716                           cg->chart_id, t->id, cg->id, t->id);
 717                     t->enabled = 0;
 718                 } else {
 719                     error("Control group with chart id '%s' already exists with id '%s' and is enabled. Disabling cgroup with id '%s'.",
 720                           cg->chart_id, t->id, cg->id);
 721                     cg->enabled = 0;
 722                 }
 723
 724                 break;
 725             }
 726         }
 727     }
 728
 729     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");
 730
 731     return cg;
 732 }
 733
 734 void cgroup_free(struct cgroup *cg) {
 735     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");
 736
 737     freez(cg->cpuacct_usage.cpu_percpu);
 738
 739     freez(cg->cpuacct_stat.filename);
 740     freez(cg->cpuacct_usage.filename);
 741     freez(cg->memory.filename);
 742     freez(cg->io_service_bytes.filename);
 743     freez(cg->io_serviced.filename);
 744     freez(cg->throttle_io_service_bytes.filename);
 745     freez(cg->throttle_io_serviced.filename);
 746     freez(cg->io_merged.filename);
 747     freez(cg->io_queued.filename);
 748
 749     freez(cg->id);
 750     freez(cg->chart_id);
 751     freez(cg->chart_title);
 752     freez(cg);
 753
 754     cgroup_root_count--;
 755 }
 756
 757 // find if a given cgroup exists
 758 struct cgroup *cgroup_find(const char *id) {
 759     debug(D_CGROUP, "searching for cgroup '%s'", id);
 760
 761     uint32_t hash = simple_hash(id);
 762
 763     struct cgroup *cg;
 764     for(cg = cgroup_root; cg ; cg = cg->next) {
 765         if(hash == cg->hash && strcmp(id, cg->id) == 0)
 766             break;
 767     }
 768
 769     debug(D_CGROUP, "cgroup_find('%s') %s", id, (cg)?"found":"not found");
 770     return cg;
 771 }
 772
 773 // ----------------------------------------------------------------------------
 774 // detect running cgroups
 775
 776 // callback for find_file_in_subdirs()
 777 void found_subdir_in_dir(const char *dir) {
 778     debug(D_CGROUP, "examining cgroup dir '%s'", dir);
 779
 780     struct cgroup *cg = cgroup_find(dir);
 781     if(!cg) {
 782         if(*dir && cgroup_max_depth > 0) {
 783             int depth = 0;
 784             const char *s;
 785
 786             for(s = dir; *s ;s++)
 787                 if(unlikely(*s == '/'))
 788                     depth++;
 789
 790             if(depth > cgroup_max_depth) {
 791                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 792                 return;
 793             }
 794         }
 795         debug(D_CGROUP, "will add dir '%s' as cgroup", dir);
 796         cg = cgroup_add(dir);
 797     }
 798
 799     if(cg) cg->available = 1;
 800 }
 801
 802 void find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 803     debug(D_CGROUP, "searching for directories in '%s'", base);
 804
 805     int enabled = -1;
 806     if(!this) this = base;
 807     size_t dirlen = strlen(this), baselen = strlen(base);
 808     const char *relative_path = &this[baselen];
 809
 810     DIR *dir = opendir(this);
 811     if(!dir) {
 812         error("Cannot read cgroups directory '%s'", base);
 813         return;
 814     }
 815
 816     callback(relative_path);
 817
 818     struct dirent *de = NULL;
 819     while((de = readdir(dir))) {
 820         if(de->d_type == DT_DIR
 821             && (
 822                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 823                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 824                 ))
 825             continue;
 826
 827         debug(D_CGROUP, "examining '%s/%s'", this, de->d_name);
 828
 829         if(de->d_type == DT_DIR) {
 830             if(enabled == -1) {
 831                 const char *r = relative_path;
 832                 if(*r == '\0') r = "/";
 833                 else if (*r == '/') r++;
 834
 835                 // we check for this option here
 836                 // so that the config will not have settings
 837                 // for leaf directories
 838                 char option[FILENAME_MAX + 1];
 839                 snprintfz(option, FILENAME_MAX, "search for cgroups under %s", r);
 840                 option[FILENAME_MAX] = '\0';
 841                 enabled = config_get_boolean("plugin:cgroups", option, 1);
 842             }
 843
 844             if(enabled) {
 845                 char *s = mallocz(dirlen + strlen(de->d_name) + 2);
 846                 strcpy(s, this);
 847                 strcat(s, "/");
 848                 strcat(s, de->d_name);
 849                 find_dir_in_subdirs(base, s, callback);
 850                 freez(s);
 851             }
 852         }
 853     }
 854
 855     closedir(dir);
 856 }
 857
 858 void mark_all_cgroups_as_not_available() {
 859     debug(D_CGROUP, "marking all cgroups as not available");
 860
 861     struct cgroup *cg;
 862
 863     // mark all as not available
 864     for(cg = cgroup_root; cg ; cg = cg->next)
 865         cg->available = 0;
 866 }
 867
 868 void cleanup_all_cgroups() {
 869     struct cgroup *cg = cgroup_root, *last = NULL;
 870
 871     for(; cg ;) {
 872         if(!cg->available) {
 873
 874             if(!last)
 875                 cgroup_root = cg->next;
 876             else
 877                 last->next = cg->next;
 878
 879             cgroup_free(cg);
 880
 881             if(!last)
 882                 cg = cgroup_root;
 883             else
 884                 cg = last->next;
 885         }
 886         else {
 887             last = cg;
 888             cg = cg->next;
 889         }
 890     }
 891 }
 892
 893 void find_all_cgroups() {
 894     debug(D_CGROUP, "searching for cgroups");
 895
 896     mark_all_cgroups_as_not_available();
 897
 898     if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage)
 899         find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir);
 900
 901     if(cgroup_enable_blkio)
 902         find_dir_in_subdirs(cgroup_blkio_base, NULL, found_subdir_in_dir);
 903
 904     if(cgroup_enable_memory)
 905         find_dir_in_subdirs(cgroup_memory_base, NULL, found_subdir_in_dir);
 906
 907     if(cgroup_enable_devices)
 908         find_dir_in_subdirs(cgroup_devices_base, NULL, found_subdir_in_dir);
 909
 910     // remove any non-existing cgroups
 911     cleanup_all_cgroups();
 912
 913     struct cgroup *cg;
 914     struct stat buf;
 915     for(cg = cgroup_root; cg ; cg = cg->next) {
 916         // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
 917
 918         if(unlikely(!cg->available))
 919             continue;
 920
 921         debug(D_CGROUP, "checking paths for cgroup '%s'", cg->id);
 922
 923         // check for newly added cgroups
 924         // and update the filenames they read
 925         char filename[FILENAME_MAX + 1];
 926         if(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename) {
 927             snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
 928             if(stat(filename, &buf) != -1) {
 929                 cg->cpuacct_stat.filename = strdupz(filename);
 930                 debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
 931             }
 932             else debug(D_CGROUP, "cpuacct.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 933         }
 934         if(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename) {
 935             snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
 936             if(stat(filename, &buf) != -1) {
 937                 cg->cpuacct_usage.filename = strdupz(filename);
 938                 debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
 939             }
 940             else debug(D_CGROUP, "cpuacct.usage_percpu file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 941         }
 942         if(cgroup_enable_memory && !cg->memory.filename) {
 943             snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
 944             if(stat(filename, &buf) != -1) {
 945                 cg->memory.filename = strdupz(filename);
 946                 debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename);
 947             }
 948             else debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 949         }
 950         if(cgroup_enable_blkio) {
 951             if(!cg->io_service_bytes.filename) {
 952                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
 953                 if(stat(filename, &buf) != -1) {
 954                     cg->io_service_bytes.filename = strdupz(filename);
 955                     debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
 956                 }
 957                 else debug(D_CGROUP, "io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 958             }
 959             if(!cg->io_serviced.filename) {
 960                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
 961                 if(stat(filename, &buf) != -1) {
 962                     cg->io_serviced.filename = strdupz(filename);
 963                     debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
 964                 }
 965                 else debug(D_CGROUP, "io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 966             }
 967             if(!cg->throttle_io_service_bytes.filename) {
 968                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
 969                 if(stat(filename, &buf) != -1) {
 970                     cg->throttle_io_service_bytes.filename = strdupz(filename);
 971                     debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
 972                 }
 973                 else debug(D_CGROUP, "throttle_io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 974             }
 975             if(!cg->throttle_io_serviced.filename) {
 976                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
 977                 if(stat(filename, &buf) != -1) {
 978                     cg->throttle_io_serviced.filename = strdupz(filename);
 979                     debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
 980                 }
 981                 else debug(D_CGROUP, "throttle_io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 982             }
 983             if(!cg->io_merged.filename) {
 984                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
 985                 if(stat(filename, &buf) != -1) {
 986                     cg->io_merged.filename = strdupz(filename);
 987                     debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
 988                 }
 989                 else debug(D_CGROUP, "io_merged file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 990             }
 991             if(!cg->io_queued.filename) {
 992                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
 993                 if(stat(filename, &buf) != -1) {
 994                     cg->io_queued.filename = strdupz(filename);
 995                     debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
 996                 }
 997                 else debug(D_CGROUP, "io_queued file for cgroup '%s': '%s' does not exist.", cg->id, filename);
 998             }
 999         }
1000     }
1001
1002     debug(D_CGROUP, "done searching for cgroups");
1003     return;
1004 }
1005
1006 // ----------------------------------------------------------------------------
1007 // generate charts
1008
1009 #define CHART_TITLE_MAX 300
1010
1011 void update_cgroup_charts(int update_every) {
1012     debug(D_CGROUP, "updating cgroups charts");
1013
1014     char type[RRD_ID_LENGTH_MAX + 1];
1015     char title[CHART_TITLE_MAX + 1];
1016
1017     struct cgroup *cg;
1018     RRDSET *st;
1019
1020     for(cg = cgroup_root; cg ; cg = cg->next) {
1021         if(!cg->available || !cg->enabled)
1022             continue;
1023
1024         if(cg->id[0] == '\0')
1025             strcpy(type, "cgroup_root");
1026         else if(cg->id[0] == '/')
1027             snprintfz(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
1028         else
1029             snprintfz(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
1030
1031         netdata_fix_chart_id(type);
1032
1033         if(cg->cpuacct_stat.updated) {
1034             st = rrdset_find_bytype(type, "cpu");
1035             if(!st) {
1036                 snprintfz(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->chart_title);
1037                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
1038
1039                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
1040                 rrddim_add(st, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
1041             }
1042             else rrdset_next(st);
1043
1044             rrddim_set(st, "user", cg->cpuacct_stat.user);
1045             rrddim_set(st, "system", cg->cpuacct_stat.system);
1046             rrdset_done(st);
1047         }
1048
1049         if(cg->cpuacct_usage.updated) {
1050             char id[RRD_ID_LENGTH_MAX + 1];
1051             unsigned int i;
1052
1053             st = rrdset_find_bytype(type, "cpu_per_core");
1054             if(!st) {
1055                 snprintfz(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->chart_title);
1056                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
1057
1058                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
1059                     snprintfz(id, CHART_TITLE_MAX, "cpu%u", i);
1060                     rrddim_add(st, id, NULL, 100, 1000000000, RRDDIM_INCREMENTAL);
1061                 }
1062             }
1063             else rrdset_next(st);
1064
1065             for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
1066                 snprintfz(id, CHART_TITLE_MAX, "cpu%u", i);
1067                 rrddim_set(st, id, cg->cpuacct_usage.cpu_percpu[i]);
1068             }
1069             rrdset_done(st);
1070         }
1071
1072         if(cg->memory.updated) {
1073             if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
1074                 st = rrdset_find_bytype(type, "mem");
1075                 if(!st) {
1076                     snprintfz(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->chart_title);
1077                     st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
1078                                        RRDSET_TYPE_STACKED);
1079
1080                     rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1081                     rrddim_add(st, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1082                     if(cg->memory.has_dirty_swap)
1083                         rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1084                     rrddim_add(st, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1085                     rrddim_add(st, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1086                 }
1087                 else rrdset_next(st);
1088
1089                 rrddim_set(st, "cache", cg->memory.cache);
1090                 rrddim_set(st, "rss", cg->memory.rss);
1091                 if(cg->memory.has_dirty_swap)
1092                     rrddim_set(st, "swap", cg->memory.swap);
1093                 rrddim_set(st, "rss_huge", cg->memory.rss_huge);
1094                 rrddim_set(st, "mapped_file", cg->memory.mapped_file);
1095                 rrdset_done(st);
1096             }
1097
1098             st = rrdset_find_bytype(type, "writeback");
1099             if(!st) {
1100                 snprintfz(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->chart_title);
1101                 st = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300,
1102                                    update_every, RRDSET_TYPE_AREA);
1103
1104                 if(cg->memory.has_dirty_swap)
1105                     rrddim_add(st, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1106                 rrddim_add(st, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1107             }
1108             else rrdset_next(st);
1109
1110             if(cg->memory.has_dirty_swap)
1111                 rrddim_set(st, "dirty", cg->memory.dirty);
1112             rrddim_set(st, "writeback", cg->memory.writeback);
1113             rrdset_done(st);
1114
1115             if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
1116                 st = rrdset_find_bytype(type, "mem_activity");
1117                 if(!st) {
1118                     snprintfz(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_title);
1119                     st = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s",
1120                                        40400, update_every, RRDSET_TYPE_LINE);
1121
1122                     rrddim_add(st, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1123                     rrddim_add(st, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1124                 }
1125                 else rrdset_next(st);
1126
1127                 rrddim_set(st, "pgpgin", cg->memory.pgpgin);
1128                 rrddim_set(st, "pgpgout", cg->memory.pgpgout);
1129                 rrdset_done(st);
1130             }
1131
1132             if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
1133                 st = rrdset_find_bytype(type, "pgfaults");
1134                 if(!st) {
1135                     snprintfz(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->chart_title);
1136                     st = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500,
1137                                        update_every, RRDSET_TYPE_LINE);
1138
1139                     rrddim_add(st, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1140                     rrddim_add(st, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1141                 }
1142                 else rrdset_next(st);
1143
1144                 rrddim_set(st, "pgfault", cg->memory.pgfault);
1145                 rrddim_set(st, "pgmajfault", cg->memory.pgmajfault);
1146                 rrdset_done(st);
1147             }
1148         }
1149
1150         if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
1151             st = rrdset_find_bytype(type, "io");
1152             if(!st) {
1153                 snprintfz(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1154                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1155                                    update_every, RRDSET_TYPE_LINE);
1156
1157                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1158                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1159             }
1160             else rrdset_next(st);
1161
1162             rrddim_set(st, "read", cg->io_service_bytes.Read);
1163             rrddim_set(st, "write", cg->io_service_bytes.Write);
1164             rrdset_done(st);
1165         }
1166
1167         if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
1168             st = rrdset_find_bytype(type, "serviced_ops");
1169             if(!st) {
1170                 snprintfz(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s", cg->chart_title);
1171                 st = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200,
1172                                    update_every, RRDSET_TYPE_LINE);
1173
1174                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1175                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1176             }
1177             else rrdset_next(st);
1178
1179             rrddim_set(st, "read", cg->io_serviced.Read);
1180             rrddim_set(st, "write", cg->io_serviced.Write);
1181             rrdset_done(st);
1182         }
1183
1184         if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
1185             st = rrdset_find_bytype(type, "io");
1186             if(!st) {
1187                 snprintfz(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1188                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1189                                    update_every, RRDSET_TYPE_LINE);
1190
1191                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1192                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1193             }
1194             else rrdset_next(st);
1195
1196             rrddim_set(st, "read", cg->throttle_io_service_bytes.Read);
1197             rrddim_set(st, "write", cg->throttle_io_service_bytes.Write);
1198             rrdset_done(st);
1199         }
1200
1201
1202         if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
1203             st = rrdset_find_bytype(type, "throttle_serviced_ops");
1204             if(!st) {
1205                 snprintfz(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->chart_title);
1206                 st = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200,
1207                                    update_every, RRDSET_TYPE_LINE);
1208
1209                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1210                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1211             }
1212             else rrdset_next(st);
1213
1214             rrddim_set(st, "read", cg->throttle_io_serviced.Read);
1215             rrddim_set(st, "write", cg->throttle_io_serviced.Write);
1216             rrdset_done(st);
1217         }
1218
1219         if(cg->io_queued.updated) {
1220             st = rrdset_find_bytype(type, "queued_ops");
1221             if(!st) {
1222                 snprintfz(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->chart_title);
1223                 st = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000,
1224                                    update_every, RRDSET_TYPE_LINE);
1225
1226                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1227                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1228             }
1229             else rrdset_next(st);
1230
1231             rrddim_set(st, "read", cg->io_queued.Read);
1232             rrddim_set(st, "write", cg->io_queued.Write);
1233             rrdset_done(st);
1234         }
1235
1236         if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1237             st = rrdset_find_bytype(type, "merged_ops");
1238             if(!st) {
1239                 snprintfz(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->chart_title);
1240                 st = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100,
1241                                    update_every, RRDSET_TYPE_LINE);
1242
1243                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1244                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1245             }
1246             else rrdset_next(st);
1247
1248             rrddim_set(st, "read", cg->io_merged.Read);
1249             rrddim_set(st, "write", cg->io_merged.Write);
1250             rrdset_done(st);
1251         }
1252     }
1253
1254     debug(D_CGROUP, "done updating cgroups charts");
1255 }
1256
1257 // ----------------------------------------------------------------------------
1258 // cgroups main
1259
1260 int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
1261     (void)dt;
1262
1263     static int cgroup_global_config_read = 0;
1264     static time_t last_run = 0;
1265     time_t now = time(NULL);
1266
1267     if(unlikely(!cgroup_global_config_read)) {
1268         read_cgroup_plugin_configuration();
1269         cgroup_global_config_read = 1;
1270     }
1271
1272     if(unlikely(cgroup_enable_new_cgroups_detected_at_runtime && now - last_run > cgroup_check_for_new_every)) {
1273         find_all_cgroups();
1274         last_run = now;
1275     }
1276
1277     read_all_cgroups(cgroup_root);
1278     update_cgroup_charts(update_every);
1279
1280     return 0;
1281 }
1282
1283 void *cgroups_main(void *ptr)
1284 {
1285     if(ptr) { ; }
1286
1287     info("CGROUP Plugin thread created with task id %d", gettid());
1288
1289     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1290         error("Cannot set pthread cancel type to DEFERRED.");
1291
1292     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1293         error("Cannot set pthread cancel state to ENABLE.");
1294
1295     struct rusage thread;
1296
1297     // when ZERO, attempt to do it
1298     int vdo_sys_fs_cgroup           = 0;
1299     int vdo_cpu_netdata             = !config_get_boolean("plugin:cgroups", "cgroups plugin resources", 1);
1300
1301     // keep track of the time each module was called
1302     unsigned long long sutime_sys_fs_cgroup = 0ULL;
1303
1304     // the next time we will run - aligned properly
1305     unsigned long long sunext = (time(NULL) - (time(NULL) % rrd_update_every) + rrd_update_every) * 1000000ULL;
1306     unsigned long long sunow;
1307
1308     RRDSET *stcpu_thread = NULL;
1309
1310     for(;1;) {
1311         if(unlikely(netdata_exit)) break;
1312
1313         // delay until it is our time to run
1314         while((sunow = time_usec()) < sunext)
1315             sleep_usec(sunext - sunow);
1316
1317         // find the next time we need to run
1318         while(time_usec() > sunext)
1319             sunext += rrd_update_every * 1000000ULL;
1320
1321         if(unlikely(netdata_exit)) break;
1322
1323         // BEGIN -- the job to be done
1324
1325         if(!vdo_sys_fs_cgroup) {
1326             debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_sys_fs_cgroup().");
1327             sunow = time_usec();
1328             vdo_sys_fs_cgroup = do_sys_fs_cgroup(rrd_update_every, (sutime_sys_fs_cgroup > 0)?sunow - sutime_sys_fs_cgroup:0ULL);
1329             sutime_sys_fs_cgroup = sunow;
1330         }
1331         if(unlikely(netdata_exit)) break;
1332
1333         // END -- the job is done
1334
1335         // --------------------------------------------------------------------
1336
1337         if(!vdo_cpu_netdata) {
1338             getrusage(RUSAGE_THREAD, &thread);
1339
1340             if(!stcpu_thread) stcpu_thread = rrdset_find("netdata.plugin_cgroups_cpu");
1341             if(!stcpu_thread) {
1342                 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);
1343
1344                 rrddim_add(stcpu_thread, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
1345                 rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
1346             }
1347             else rrdset_next(stcpu_thread);
1348
1349             rrddim_set(stcpu_thread, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
1350             rrddim_set(stcpu_thread, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
1351             rrdset_done(stcpu_thread);
1352         }
1353     }
1354
1355     pthread_exit(NULL);
1356     return NULL;
1357 }