src/registry.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4
   5 #include <uuid/uuid.h>
   6 #include <inttypes.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <ctype.h>
  10 #include <unistd.h>
  11 #include <sys/stat.h>
  12 #include <sys/types.h>
  13 #include <errno.h>
  14 #include <fcntl.h>
  15
  16 #include "log.h"
  17 #include "common.h"
  18 #include "dictionary.h"
  19 #include "appconfig.h"
  20
  21 #include "web_client.h"
  22 #include "rrd.h"
  23 #include "rrd2json.h"
  24 #include "registry.h"
  25
  26
  27 // ----------------------------------------------------------------------------
  28 // TODO
  29 //
  30 // 1. the default tracking cookie expires in 1 year, but the persons are not
  31 //    removed from the db - this means the database only grows - ideally the
  32 //    database should be cleaned in registry_save() for both on-disk and
  33 //    on-memory entries.
  34 //
  35 //    Cleanup:
  36 //    i. Find all the PERSONs that have expired cookie
  37 //    ii. For each of their PERSON_URLs:
  38 //     - decrement the linked MACHINE links
  39 //     - if the linked MACHINE has no other links, remove the linked MACHINE too
  40 //     - remove the PERSON_URL
  41 //
  42 // 2. add protection to prevent abusing the registry by flooding it with
  43 //    requests to fill the memory and crash it.
  44 //
  45 //    Possible protections:
  46 //    - limit the number of URLs per person
  47 //    - limit the number of URLs per machine
  48 //    - limit the number of persons
  49 //    - limit the number of machines
  50 //    - [DONE] limit the size of URLs
  51 //    - [DONE] limit the size of PERSON_URL names
  52 //    - limit the number of requests that add data to the registry,
  53 //      per client IP per hour
  54
  55
  56
  57 #define REGISTRY_URL_FLAGS_DEFAULT 0x00
  58 #define REGISTRY_URL_FLAGS_EXPIRED 0x01
  59
  60 #define DICTIONARY_FLAGS DICTIONARY_FLAG_VALUE_LINK_DONT_CLONE | DICTIONARY_FLAG_NAME_LINK_DONT_CLONE
  61
  62 // ----------------------------------------------------------------------------
  63 // COMMON structures
  64
  65 struct registry {
  66         int enabled;
  67
  68         char machine_guid[36 + 1];
  69
  70         // entries counters / statistics
  71         unsigned long long persons_count;
  72         unsigned long long machines_count;
  73         unsigned long long usages_count;
  74         unsigned long long urls_count;
  75         unsigned long long persons_urls_count;
  76         unsigned long long machines_urls_count;
  77         unsigned long long log_count;
  78
  79         // memory counters / statistics
  80         unsigned long long persons_memory;
  81         unsigned long long machines_memory;
  82         unsigned long long urls_memory;
  83         unsigned long long persons_urls_memory;
  84         unsigned long long machines_urls_memory;
  85
  86         // configuration
  87         unsigned long long save_registry_every_entries;
  88         char *registry_domain;
  89         char *hostname;
  90         char *registry_to_announce;
  91         time_t persons_expiration; // seconds to expire idle persons
  92
  93         size_t max_url_length;
  94         size_t max_name_length;
  95
  96         // file/path names
  97         char *pathname;
  98         char *db_filename;
  99         char *log_filename;
 100         char *machine_guid_filename;
 101
 102         // open files
 103         FILE *log_fp;
 104
 105         // the database
 106         DICTIONARY *persons;    // dictionary of PERSON *, with key the PERSON.guid
 107         DICTIONARY *machines;   // dictionary of MACHINE *, with key the MACHINE.guid
 108         DICTIONARY *urls;               // dictionary of URL *, with key the URL.url
 109
 110         // concurrency locking
 111         // we keep different locks for different things
 112         // so that many tasks can be completed in parallel
 113         pthread_mutex_t persons_lock;
 114         pthread_mutex_t machines_lock;
 115         pthread_mutex_t urls_lock;
 116         pthread_mutex_t person_urls_lock;
 117         pthread_mutex_t machine_urls_lock;
 118         pthread_mutex_t log_lock;
 119 } registry;
 120
 121
 122 // ----------------------------------------------------------------------------
 123 // URL structures
 124 // Save memory by de-duplicating URLs
 125 // so instead of storing URLs all over the place
 126 // we store them here and we keep pointers elsewhere
 127
 128 struct url {
 129         uint32_t links; // the number of links to this URL - when none is left, we free it
 130         uint16_t len;   // the length of the URL in bytes
 131         char url[1];    // the URL - dynamically allocated to more size
 132 };
 133 typedef struct url URL;
 134
 135
 136 // ----------------------------------------------------------------------------
 137 // MACHINE structures
 138
 139 // For each MACHINE-URL pair we keep this
 140 struct machine_url {
 141         URL *url;                                       // de-duplicated URL
 142 //      DICTIONARY *persons;            // dictionary of PERSON *
 143
 144         uint8_t flags;
 145         uint32_t first_t;                       // the first time we saw this
 146         uint32_t last_t;                        // the last time we saw this
 147         uint32_t usages;                        // how many times this has been accessed
 148 };
 149 typedef struct machine_url MACHINE_URL;
 150
 151 // A machine
 152 struct machine {
 153         char guid[36 + 1];                      // the GUID
 154
 155         uint32_t links;                         // the number of PERSON_URLs linked to this machine
 156
 157         DICTIONARY *urls;                       // MACHINE_URL *
 158
 159         uint32_t first_t;                       // the first time we saw this
 160         uint32_t last_t;                        // the last time we saw this
 161         uint32_t usages;                        // how many times this has been accessed
 162 };
 163 typedef struct machine MACHINE;
 164
 165
 166 // ----------------------------------------------------------------------------
 167 // PERSON structures
 168
 169 // for each PERSON-URL pair we keep this
 170 struct person_url {
 171         URL *url;                                       // de-duplicated URL
 172         MACHINE *machine;                       // link the MACHINE of this URL
 173
 174         uint8_t flags;
 175         uint32_t first_t;                       // the first time we saw this
 176         uint32_t last_t;                        // the last time we saw this
 177         uint32_t usages;                        // how many times this has been accessed
 178
 179         char name[1];                           // the name of the URL, as known by the user
 180                                                                 // dynamically allocated to fit properly
 181 };
 182 typedef struct person_url PERSON_URL;
 183
 184 // A person
 185 struct person {
 186         char guid[36 + 1];                      // the person GUID
 187
 188         DICTIONARY *urls;                       // dictionary of PERSON_URL *
 189
 190         uint32_t first_t;                       // the first time we saw this
 191         uint32_t last_t;                        // the last time we saw this
 192         uint32_t usages;                        // how many times this has been accessed
 193 };
 194 typedef struct person PERSON;
 195
 196
 197 // ----------------------------------------------------------------------------
 198 // REGISTRY concurrency locking
 199
 200 static inline void registry_persons_lock(void) {
 201         pthread_mutex_lock(&registry.persons_lock);
 202 }
 203
 204 static inline void registry_persons_unlock(void) {
 205         pthread_mutex_unlock(&registry.persons_lock);
 206 }
 207
 208 static inline void registry_machines_lock(void) {
 209         pthread_mutex_lock(&registry.machines_lock);
 210 }
 211
 212 static inline void registry_machines_unlock(void) {
 213         pthread_mutex_unlock(&registry.machines_lock);
 214 }
 215
 216 static inline void registry_urls_lock(void) {
 217         pthread_mutex_lock(&registry.urls_lock);
 218 }
 219
 220 static inline void registry_urls_unlock(void) {
 221         pthread_mutex_unlock(&registry.urls_lock);
 222 }
 223
 224 // ideally, we should not lock the whole registry for
 225 // updating a person's urls.
 226 // however, to save the memory required for keeping a
 227 // mutex (40 bytes) per person, we do...
 228 static inline void registry_person_urls_lock(PERSON *p) {
 229         (void)p;
 230         pthread_mutex_lock(&registry.person_urls_lock);
 231 }
 232
 233 static inline void registry_person_urls_unlock(PERSON *p) {
 234         (void)p;
 235         pthread_mutex_unlock(&registry.person_urls_lock);
 236 }
 237
 238 // ideally, we should not lock the whole registry for
 239 // updating a machine's urls.
 240 // however, to save the memory required for keeping a
 241 // mutex (40 bytes) per machine, we do...
 242 static inline void registry_machine_urls_lock(MACHINE *m) {
 243         (void)m;
 244         pthread_mutex_lock(&registry.machine_urls_lock);
 245 }
 246
 247 static inline void registry_machine_urls_unlock(MACHINE *m) {
 248         (void)m;
 249         pthread_mutex_unlock(&registry.machine_urls_lock);
 250 }
 251
 252 static inline void registry_log_lock(void) {
 253         pthread_mutex_lock(&registry.log_lock);
 254 }
 255
 256 static inline void registry_log_unlock(void) {
 257         pthread_mutex_unlock(&registry.log_lock);
 258 }
 259
 260
 261 // ----------------------------------------------------------------------------
 262 // common functions
 263
 264 // parse a GUID and re-generated to be always lower case
 265 // this is used as a protection against the variations of GUIDs
 266 static inline int registry_regenerate_guid(const char *guid, char *result) {
 267         uuid_t uuid;
 268         if(unlikely(uuid_parse(guid, uuid) == -1)) {
 269                 info("Registry: GUID '%s' is not a valid GUID.", guid);
 270                 return -1;
 271         }
 272         else {
 273                 uuid_unparse_lower(uuid, result);
 274
 275 #ifdef NETDATA_INTERNAL_CHECKS
 276                 if(strcmp(guid, result))
 277                         info("Registry: source GUID '%s' and re-generated GUID '%s' differ!", guid, result);
 278 #endif /* NETDATA_INTERNAL_CHECKS */
 279         }
 280
 281         return 0;
 282 }
 283
 284 // make sure the names of the machines / URLs do not contain any tabs
 285 // (which are used as our separator in the database files)
 286 // and are properly trimmed (before and after)
 287 static inline char *registry_fix_machine_name(char *name, size_t *len) {
 288         char *s = name?name:"";
 289
 290         // skip leading spaces
 291         while(*s && isspace(*s)) s++;
 292
 293         // make sure all spaces are a SPACE
 294         char *t = s;
 295         while(*t) {
 296                 if(unlikely(isspace(*t)))
 297                         *t = ' ';
 298
 299                 t++;
 300         }
 301
 302         // remove trailing spaces
 303         while(--t >= s) {
 304                 if(*t == ' ')
 305                         *t = '\0';
 306                 else
 307                         break;
 308         }
 309         t++;
 310
 311         if(likely(len))
 312                 *len = (t - s);
 313
 314         return s;
 315 }
 316
 317 static inline char *registry_fix_url(char *url, size_t *len) {
 318         return registry_fix_machine_name(url, len);
 319 }
 320
 321
 322 // ----------------------------------------------------------------------------
 323 // forward definition of functions
 324
 325 extern PERSON *registry_request_access(char *person_guid, char *machine_guid, char *url, char *name, time_t when);
 326 extern PERSON *registry_request_delete(char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when);
 327
 328
 329 // ----------------------------------------------------------------------------
 330 // URL
 331
 332 static inline URL *registry_url_allocate_nolock(const char *url, size_t urllen) {
 333         // protection from too big URLs
 334         if(urllen > registry.max_url_length)
 335                 urllen = registry.max_url_length;
 336
 337         debug(D_REGISTRY, "Registry: registry_url_allocate_nolock('%s'): allocating %zu bytes", url, sizeof(URL) + urllen);
 338         URL *u = malloc(sizeof(URL) + urllen);
 339         if(!u) fatal("Cannot allocate %zu bytes for URL '%s'", sizeof(URL) + urllen);
 340
 341         // a simple strcpy() should do the job
 342         // but I prefer to be safe, since the caller specified urllen
 343         strncpy(u->url, url, urllen);
 344         u->url[urllen] = '\0';
 345
 346         u->len = urllen;
 347         u->links = 0;
 348
 349         registry.urls_memory += sizeof(URL) + urllen;
 350
 351         debug(D_REGISTRY, "Registry: registry_url_allocate_nolock('%s'): indexing it", url);
 352         dictionary_set(registry.urls, u->url, u, sizeof(URL));
 353
 354         return u;
 355 }
 356
 357 static inline URL *registry_url_get(const char *url, size_t urllen) {
 358         debug(D_REGISTRY, "Registry: registry_url_get('%s')", url);
 359
 360         registry_urls_lock();
 361
 362         URL *u = dictionary_get(registry.urls, url);
 363         if(!u) {
 364                 u = registry_url_allocate_nolock(url, urllen);
 365                 registry.urls_count++;
 366         }
 367
 368         registry_urls_unlock();
 369
 370         return u;
 371 }
 372
 373 static inline void registry_url_link_nolock(URL *u) {
 374         u->links++;
 375         debug(D_REGISTRY, "Registry: registry_url_link_nolock('%s'): URL has now %u links", u->url, u->links);
 376 }
 377
 378 static inline void registry_url_unlink_nolock(URL *u) {
 379         u->links--;
 380         if(!u->links) {
 381                 debug(D_REGISTRY, "Registry: registry_url_unlink_nolock('%s'): No more links for this URL", u->url);
 382                 dictionary_del(registry.urls, u->url);
 383                 free(u);
 384         }
 385         else
 386                 debug(D_REGISTRY, "Registry: registry_url_unlink_nolock('%s'): URL has %u links left", u->url, u->links);
 387 }
 388
 389
 390 // ----------------------------------------------------------------------------
 391 // MACHINE
 392
 393 static inline MACHINE *registry_machine_find(const char *machine_guid) {
 394         debug(D_REGISTRY, "Registry: registry_machine_find('%s')", machine_guid);
 395         return dictionary_get(registry.machines, machine_guid);
 396 }
 397
 398 static inline MACHINE_URL *registry_machine_url_allocate(MACHINE *m, URL *u, time_t when) {
 399         debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s'): allocating %zu bytes", m->guid, u->url, sizeof(MACHINE_URL));
 400
 401         MACHINE_URL *mu = malloc(sizeof(MACHINE_URL));
 402         if(!mu) fatal("registry_machine_link_to_url('%s', '%s'): cannot allocate %zu bytes.", m->guid, u->url, sizeof(MACHINE_URL));
 403
 404         // mu->persons = dictionary_create(DICTIONARY_FLAGS);
 405         // dictionary_set(mu->persons, p->guid, p, sizeof(PERSON));
 406
 407         mu->first_t = mu->last_t = when;
 408         mu->usages = 1;
 409         mu->url = u;
 410         mu->flags = REGISTRY_URL_FLAGS_DEFAULT;
 411
 412         registry.machines_urls_memory += sizeof(MACHINE_URL);
 413
 414         debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s'): indexing URL in machine", m->guid, u->url);
 415         dictionary_set(m->urls, u->url, mu, sizeof(MACHINE_URL));
 416         registry_url_link_nolock(u);
 417
 418         return mu;
 419 }
 420
 421 static inline MACHINE *registry_machine_allocate(const char *machine_guid, time_t when) {
 422         debug(D_REGISTRY, "Registry: registry_machine_allocate('%s'): creating new machine, sizeof(MACHINE)=%zu", machine_guid, sizeof(MACHINE));
 423
 424         MACHINE *m = malloc(sizeof(MACHINE));
 425         if(!m) fatal("Registry: cannot allocate memory for new machine '%s'", machine_guid);
 426
 427         strncpy(m->guid, machine_guid, 36);
 428
 429         debug(D_REGISTRY, "Registry: registry_machine_allocate('%s'): creating dictionary of urls", machine_guid);
 430         m->urls = dictionary_create(DICTIONARY_FLAGS);
 431
 432         m->first_t = m->last_t = when;
 433         m->usages = 0;
 434
 435         registry.machines_memory += sizeof(MACHINE);
 436
 437         registry.machines_count++;
 438         dictionary_set(registry.machines, m->guid, m, sizeof(MACHINE));
 439
 440         return m;
 441 }
 442
 443 // 1. validate machine GUID
 444 // 2. if it is valid, find it or create it and return it
 445 // 3. if it is not valid, return NULL
 446 static inline MACHINE *registry_machine_get(const char *machine_guid, time_t when) {
 447         MACHINE *m = NULL;
 448
 449         registry_machines_lock();
 450
 451         if(likely(machine_guid && *machine_guid)) {
 452                 // validate it is a GUID
 453                 char buf[36 + 1];
 454                 if(unlikely(registry_regenerate_guid(machine_guid, buf) == -1))
 455                         info("Registry: machine guid '%s' is not a valid guid. Ignoring it.", machine_guid);
 456                 else {
 457                         machine_guid = buf;
 458                         m = registry_machine_find(machine_guid);
 459                         if(!m) m = registry_machine_allocate(machine_guid, when);
 460                 }
 461         }
 462
 463         registry_machines_unlock();
 464
 465         return m;
 466 }
 467
 468
 469 // ----------------------------------------------------------------------------
 470 // PERSON
 471
 472 static inline PERSON *registry_person_find(const char *person_guid) {
 473         debug(D_REGISTRY, "Registry: registry_person_find('%s')", person_guid);
 474         return dictionary_get(registry.persons, person_guid);
 475 }
 476
 477 static inline PERSON_URL *registry_person_url_allocate(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) {
 478         // protection from too big names
 479         if(namelen > registry.max_name_length)
 480                 namelen = registry.max_name_length;
 481
 482         debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url,
 483                   sizeof(PERSON_URL) + namelen);
 484
 485         PERSON_URL *pu = malloc(sizeof(PERSON_URL) + namelen);
 486         if(!pu) fatal("registry_person_url_allocate('%s', '%s', '%s'): cannot allocate %zu bytes.", p->guid, m->guid, u->url, sizeof(PERSON_URL) + namelen);
 487
 488         // a simple strcpy() should do the job
 489         // but I prefer to be safe, since the caller specified urllen
 490         strncpy(pu->name, name, namelen);
 491         pu->name[namelen] = '\0';
 492
 493         pu->machine = m;
 494         pu->first_t = pu->last_t = when;
 495         pu->usages = 1;
 496         pu->url = u;
 497         pu->flags = REGISTRY_URL_FLAGS_DEFAULT;
 498         m->links++;
 499
 500         registry.persons_urls_memory += sizeof(PERSON_URL) + namelen;
 501
 502         debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, u->url);
 503         dictionary_set(p->urls, u->url, pu, sizeof(PERSON_URL));
 504         registry_url_link_nolock(u);
 505
 506         return pu;
 507 }
 508
 509 static inline PERSON_URL *registry_person_url_reallocate(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when, PERSON_URL *pu) {
 510         // this function is needed to change the name of a PERSON_URL
 511
 512         debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url,
 513                   sizeof(PERSON_URL) + namelen);
 514
 515         PERSON_URL *tpu = registry_person_url_allocate(p, m, u, name, namelen, when);
 516         tpu->first_t = pu->first_t;
 517         tpu->last_t = pu->last_t;
 518         tpu->usages = pu->usages;
 519
 520         // ok, these are a hack - since the registry_person_url_allocate() is
 521         // adding these, we have to subtract them
 522         tpu->machine->links--;
 523         registry.persons_urls_memory -= sizeof(PERSON_URL) + strlen(pu->name);
 524         registry_url_unlink_nolock(u);
 525
 526         free(pu);
 527
 528         return tpu;
 529 }
 530
 531 static inline PERSON *registry_person_allocate(const char *person_guid, time_t when) {
 532         PERSON *p = NULL;
 533
 534         debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(PERSON));
 535
 536         p = malloc(sizeof(PERSON));
 537         if(!p) fatal("Registry: cannot allocate memory for new person.");
 538
 539         if(!person_guid) {
 540                 for (; ;) {
 541                         uuid_t uuid;
 542                         if (uuid_generate_time_safe(uuid) == -1)
 543                                 info("Registry: uuid_generate_time_safe() reports UUID generation is not safe for uniqueness.");
 544
 545                         uuid_unparse_lower(uuid, p->guid);
 546
 547                         debug(D_REGISTRY, "Registry: Checking if the generated person guid '%s' is unique", p->guid);
 548                         if (!dictionary_get(registry.persons, p->guid)) {
 549                                 debug(D_REGISTRY, "Registry: generated person guid '%s' is unique", p->guid);
 550                                 break;
 551                         }
 552                         else
 553                                 info("Registry: generated person guid '%s' found in the registry. Retrying...", p->guid);
 554                 }
 555         }
 556         else {
 557                 strncpy(p->guid, person_guid, 36);
 558                 p->guid[36] = '\0';
 559         }
 560
 561         debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): creating dictionary of urls", p->guid);
 562         p->urls = dictionary_create(DICTIONARY_FLAGS);
 563
 564         p->first_t = p->last_t = when;
 565         p->usages = 0;
 566
 567         registry.persons_memory += sizeof(PERSON);
 568
 569         registry.persons_count++;
 570         dictionary_set(registry.persons, p->guid, p, sizeof(PERSON));
 571
 572         return p;
 573 }
 574
 575
 576 // 1. validate person GUID
 577 // 2. if it is valid, find it
 578 // 3. if it is not valid, create a new one
 579 // 4. return it
 580 static inline PERSON *registry_person_get(const char *person_guid, time_t when) {
 581         PERSON *p = NULL;
 582
 583         registry_persons_lock();
 584
 585         if(person_guid && *person_guid) {
 586                 char buf[36 + 1];
 587                 // validate it is a GUID
 588                 if(unlikely(registry_regenerate_guid(person_guid, buf) == -1))
 589                         info("Registry: person guid '%s' is not a valid guid. Ignoring it.", person_guid);
 590                 else {
 591                         person_guid = buf;
 592                         p = registry_person_find(person_guid);
 593                         if(!p) person_guid = NULL;
 594                 }
 595         }
 596
 597         if(!p) p = registry_person_allocate(NULL, when);
 598
 599         registry_persons_unlock();
 600
 601         return p;
 602 }
 603
 604 // ----------------------------------------------------------------------------
 605 // LINKING OF OBJECTS
 606
 607 static inline PERSON_URL *registry_person_link_to_url(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) {
 608         debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): searching for URL in person", p->guid, m->guid, u->url);
 609
 610         registry_person_urls_lock(p);
 611
 612         PERSON_URL *pu = dictionary_get(p->urls, u->url);
 613         if(!pu) {
 614                 debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url);
 615                 pu = registry_person_url_allocate(p, m, u, name, namelen, when);
 616                 registry.persons_urls_count++;
 617         }
 618         else {
 619                 debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url);
 620                 pu->usages++;
 621
 622                 if(pu->machine != m) {
 623                         MACHINE_URL *mu = dictionary_get(pu->machine->urls, u->url);
 624                         if(mu) {
 625                                 info("registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - expiring it from previous machine.",
 626                                          p->guid, m->guid, u->url, pu->machine->guid);
 627                                 mu->flags |= REGISTRY_URL_FLAGS_EXPIRED;
 628                         }
 629                         else {
 630                                 info("registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - but the URL is not linked to the old machine.",
 631                                          p->guid, m->guid, u->url, pu->machine->guid);
 632                         }
 633
 634                         pu->machine->links--;
 635                         pu->machine = m;
 636                 }
 637
 638                 if(strcmp(pu->name, name)) {
 639                         // the name of the PERSON_URL has changed !
 640                         pu = registry_person_url_reallocate(p, m, u, name, namelen, when, pu);
 641                 }
 642         }
 643
 644         p->usages++;
 645         p->last_t = when;
 646
 647         if(pu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
 648                 info("registry_person_link_to_url('%s', '%s', '%s'): accessing an expired URL. Re-enabling URL.", p->guid, m->guid, u->url);
 649                 pu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED;
 650         }
 651
 652         registry_person_urls_unlock(p);
 653
 654         return pu;
 655 }
 656
 657 static inline MACHINE_URL *registry_machine_link_to_url(PERSON *p, MACHINE *m, URL *u, time_t when) {
 658         debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): searching for URL in machine", p->guid, m->guid, u->url);
 659
 660         registry_machine_urls_lock(m);
 661
 662         MACHINE_URL *mu = dictionary_get(m->urls, u->url);
 663         if(!mu) {
 664                 debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url);
 665                 mu = registry_machine_url_allocate(m, u, when);
 666                 registry.machines_urls_count++;
 667         }
 668         else {
 669                 debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url);
 670                 mu->usages++;
 671         }
 672
 673         //debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): indexing person in machine", p->guid, m->guid, u->url);
 674         //dictionary_set(mu->persons, p->guid, p, sizeof(PERSON));
 675
 676         m->usages++;
 677         m->last_t = when;
 678
 679         if(mu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
 680                 info("registry_machine_link_to_url('%s', '%s', '%s'): accessing an expired URL.", p->guid, m->guid, u->url);
 681                 mu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED;
 682         }
 683
 684         registry_machine_urls_unlock(m);
 685
 686         return mu;
 687 }
 688
 689 // ----------------------------------------------------------------------------
 690 // REGISTRY LOG LOAD/SAVE
 691
 692 static inline int registry_should_save_db(void) {
 693         debug(D_REGISTRY, "log entries %llu, max %llu", registry.log_count, registry.save_registry_every_entries);
 694         return registry.log_count > registry.save_registry_every_entries;
 695 }
 696
 697 static inline void registry_log(const char action, PERSON *p, MACHINE *m, URL *u, char *name) {
 698         if(likely(registry.log_fp)) {
 699                 // we lock only if the file is open
 700                 // to allow replaying the log at registry_log_load()
 701                 registry_log_lock();
 702
 703                 if(unlikely(fprintf(registry.log_fp, "%c\t%08x\t%s\t%s\t%s\t%s\n",
 704                                 action,
 705                                 p->last_t,
 706                                 p->guid,
 707                                 m->guid,
 708                                 name,
 709                                 u->url) < 0))
 710                         error("Registry: failed to save log. Registry data may be lost in case of abnormal restart.");
 711
 712                 // we increase the counter even on failures
 713                 // so that the registry will be saved periodically
 714                 registry.log_count++;
 715
 716                 registry_log_unlock();
 717
 718                 // this must be outside the log_lock(), or a deadlock will happen.
 719                 // registry_save() checks the same inside the log_lock, so only
 720                 // one thread will save the db
 721                 if(unlikely(registry_should_save_db()))
 722                         registry_save();
 723         }
 724 }
 725
 726 static inline int registry_log_open_nolock(void) {
 727         if(registry.log_fp)
 728                 fclose(registry.log_fp);
 729
 730         registry.log_fp = fopen(registry.log_filename, "a");
 731
 732         if(registry.log_fp) {
 733                 if (setvbuf(registry.log_fp, NULL, _IOLBF, 0) != 0)
 734                         error("Cannot set line buffering on registry log file.");
 735                 return 0;
 736         }
 737
 738         error("Cannot open registry log file '%s'. Registry data will be lost in case of netdata or server crash.", registry.log_filename);
 739         return -1;
 740 }
 741
 742 static inline void registry_log_close_nolock(void) {
 743         if(registry.log_fp) {
 744                 fclose(registry.log_fp);
 745                 registry.log_fp = NULL;
 746         }
 747 }
 748
 749 static inline void registry_log_recreate_nolock(void) {
 750         if(registry.log_fp != NULL) {
 751                 registry_log_close_nolock();
 752
 753                 // open it with truncate
 754                 registry.log_fp = fopen(registry.log_filename, "w");
 755                 if(registry.log_fp) fclose(registry.log_fp);
 756                 else error("Cannot truncate registry log '%s'", registry.log_filename);
 757
 758                 registry.log_fp = NULL;
 759
 760                 registry_log_open_nolock();
 761         }
 762 }
 763
 764 int registry_log_load(void) {
 765         char *s, buf[4096 + 1];
 766         size_t line = -1;
 767
 768         // closing the log is required here
 769         // otherwise we will append to it the values we read
 770         registry_log_close_nolock();
 771
 772         debug(D_REGISTRY, "Registry: loading active db from: %s", registry.log_filename);
 773         FILE *fp = fopen(registry.log_filename, "r");
 774         if(!fp)
 775                 error("Registry: cannot open registry file: %s", registry.log_filename);
 776         else {
 777                 line = 0;
 778                 size_t len = 0;
 779                 while ((s = fgets_trim_len(buf, 4096, fp, &len))) {
 780                         line++;
 781
 782                         switch (s[0]) {
 783                                 case 'A': // accesses
 784                                 case 'D': // deletes
 785
 786                                         // verify it is valid
 787                                         if (unlikely(len < 85 || s[1] != '\t' || s[10] != '\t' || s[47] != '\t' || s[84] != '\t')) {
 788                                                 error("Registry: log line %u is wrong (len = %zu).", line, len);
 789                                                 continue;
 790                                         }
 791                                         s[1] = s[10] = s[47] = s[84] = '\0';
 792
 793                                         // get the variables
 794                                         time_t when = strtoul(&s[2], NULL, 16);
 795                                         char *person_guid = &s[11];
 796                                         char *machine_guid = &s[48];
 797                                         char *name = &s[85];
 798
 799                                         // skip the name to find the url
 800                                         char *url = name;
 801                                         while(*url && *url != '\t') url++;
 802                                         if(!*url) {
 803                                                 error("Registry: log line %u does not have a url.", line);
 804                                                 continue;
 805                                         }
 806                                         *url++ = '\0';
 807
 808                                         // make sure the person exists
 809                                         // without this, a new person guid will be created
 810                                         PERSON *p = registry_person_find(person_guid);
 811                                         if(!p) p = registry_person_allocate(person_guid, when);
 812
 813                                         if(s[0] == 'A')
 814                                                 registry_request_access(p->guid, machine_guid, url, name, when);
 815                                         else
 816                                                 registry_request_delete(p->guid, machine_guid, url, name, when);
 817
 818                                         break;
 819
 820                                 default:
 821                                         error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.log_filename, s);
 822                                         break;
 823                         }
 824                 }
 825         }
 826
 827         // open the log again
 828         registry_log_open_nolock();
 829
 830         return line;
 831 }
 832
 833
 834 // ----------------------------------------------------------------------------
 835 // REGISTRY REQUESTS
 836
 837 PERSON *registry_request_access(char *person_guid, char *machine_guid, char *url, char *name, time_t when) {
 838         debug(D_REGISTRY, "registry_request_access('%s', '%s', '%s'): NEW REQUEST", (person_guid)?person_guid:"", machine_guid, url);
 839
 840         MACHINE *m = registry_machine_get(machine_guid, when);
 841         if(!m) return NULL;
 842
 843         // make sure the name is valid
 844         size_t namelen;
 845         name = registry_fix_machine_name(name, &namelen);
 846
 847         size_t urllen;
 848         url = registry_fix_url(url, &urllen);
 849
 850         URL *u = registry_url_get(url, urllen);
 851         PERSON *p = registry_person_get(person_guid, when);
 852
 853         registry_person_link_to_url(p, m, u, name, namelen, when);
 854         registry_machine_link_to_url(p, m, u, when);
 855
 856         registry_log('A', p, m, u, name);
 857
 858         registry.usages_count++;
 859         return p;
 860 }
 861
 862 // verify the person, the machine and the URL exist in our DB
 863 PERSON_URL *registry_verify_request(char *person_guid, char *machine_guid, char *url, PERSON **pp, MACHINE **mm) {
 864         char pbuf[36 + 1], mbuf[36 + 1];
 865
 866         if(!person_guid || !*person_guid || !machine_guid || !*machine_guid || !url || !*url) {
 867                 info("Registry Request Verification: invalid request! person: '%s', machine '%s', url '%s'", person_guid?person_guid:"UNSET", machine_guid?machine_guid:"UNSET", url?url:"UNSET");
 868                 return NULL;
 869         }
 870
 871         // normalize the url
 872         url = registry_fix_url(url, NULL);
 873
 874         // make sure the person GUID is valid
 875         if(registry_regenerate_guid(person_guid, pbuf) == -1) {
 876                 info("Registry Request Verification: invalid person GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 877                 return NULL;
 878         }
 879         person_guid = pbuf;
 880
 881         // make sure the machine GUID is valid
 882         if(registry_regenerate_guid(machine_guid, mbuf) == -1) {
 883                 info("Registry Request Verification: invalid machine GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 884                 return NULL;
 885         }
 886         machine_guid = mbuf;
 887
 888         // make sure the machine exists
 889         MACHINE *m = registry_machine_find(machine_guid);
 890         if(!m) {
 891                 info("Registry Request Verification: machine not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 892                 return NULL;
 893         }
 894         if(mm) *mm = m;
 895
 896         // make sure the person exist
 897         PERSON *p = registry_person_find(person_guid);
 898         if(!p) {
 899                 info("Registry Request Verification: person not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 900                 return NULL;
 901         }
 902         if(pp) *pp = p;
 903
 904         PERSON_URL *pu = dictionary_get(p->urls, url);
 905         if(!pu) {
 906                 info("Registry Request Verification: URL not found for person, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 907                 return NULL;
 908         }
 909         return pu;
 910 }
 911
 912 PERSON *registry_request_delete(char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) {
 913         (void)when;
 914
 915         PERSON *p = NULL;
 916         MACHINE *m = NULL;
 917         PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m);
 918         if(!pu || !p || !m) return NULL;
 919
 920         // normalize the url
 921         delete_url = registry_fix_url(delete_url, NULL);
 922
 923         // make sure the user is not deleting the url it uses
 924         if(!strcmp(delete_url, pu->url->url)) {
 925                 info("Registry Delete Request: delete URL is the one currently accessing, person: '%s', machine '%s', url '%s', delete url '%s'", p->guid, m->guid, pu->url->url, delete_url);
 926                 return NULL;
 927         }
 928
 929         registry_person_urls_lock(p);
 930
 931         PERSON_URL *dpu = dictionary_get(p->urls, delete_url);
 932         if(!dpu) {
 933                 info("Registry Delete Request: URL not found for person, person: '%s', machine '%s', url '%s', delete url '%s'", p->guid, m->guid, pu->url->url, delete_url);
 934                 registry_person_urls_unlock(p);
 935                 return NULL;
 936         }
 937
 938         registry_log('D', p, m, pu->url, dpu->url->url);
 939
 940         dictionary_del(p->urls, dpu->url->url);
 941         registry_url_unlink_nolock(dpu->url);
 942         free(dpu);
 943
 944         registry_person_urls_unlock(p);
 945         return p;
 946 }
 947
 948
 949 // a structure to pass to the dictionary_get_all() callback handler
 950 struct machine_request_callback_data {
 951         MACHINE *find_this_machine;
 952         PERSON_URL *result;
 953 };
 954
 955 // the callback function
 956 // this will be run for every PERSON_URL of this PERSON
 957 int machine_request_callback(void *entry, void *data) {
 958         PERSON_URL *mypu = (PERSON_URL *)entry;
 959         struct machine_request_callback_data *myrdata = (struct machine_request_callback_data *)data;
 960
 961         if(mypu->machine == myrdata->find_this_machine) {
 962                 myrdata->result = mypu;
 963                 return -1; // this will also stop the walk through
 964         }
 965
 966         return 0; // continue
 967 }
 968
 969 MACHINE *registry_request_machine(char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) {
 970         (void)when;
 971
 972         char mbuf[36 + 1];
 973
 974         PERSON *p = NULL;
 975         MACHINE *m = NULL;
 976         PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m);
 977         if(!pu || !p || !m) return NULL;
 978
 979         // make sure the machine GUID is valid
 980         if(registry_regenerate_guid(request_machine, mbuf) == -1) {
 981                 info("Registry Machine URLs request: invalid machine GUID, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, m->guid, pu->url->url, request_machine);
 982                 return NULL;
 983         }
 984         request_machine = mbuf;
 985
 986         // make sure the machine exists
 987         m = registry_machine_find(request_machine);
 988         if(!m) {
 989                 info("Registry Machine URLs request: machine not found, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, m->guid, pu->url->url, request_machine);
 990                 return NULL;
 991         }
 992
 993         // Verify the user has in the past accessed this machine
 994         // We will walk through the PERSON_URLs to find the machine
 995         // linking to our machine
 996
 997         // a structure to pass to the dictionary_get_all() callback handler
 998         struct machine_request_callback_data rdata = { m, NULL };
 999
1000         // request a walk through on the dictionary
1001         // no need for locking here, the underlying dictionary has its own
1002         dictionary_get_all(p->urls, machine_request_callback, &rdata);
1003
1004         if(rdata.result)
1005                 return m;
1006
1007         return NULL;
1008 }
1009
1010
1011 // ----------------------------------------------------------------------------
1012 // REGISTRY JSON generation
1013
1014 #define REGISTRY_STATUS_OK "ok"
1015 #define REGISTRY_STATUS_FAILED "failed"
1016 #define REGISTRY_STATUS_DISABLED "disabled"
1017
1018 static inline void registry_set_person_cookie(struct web_client *w, PERSON *p) {
1019         char edate[100];
1020         time_t et = time(NULL) + registry.persons_expiration;
1021         struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf);
1022         strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm);
1023
1024         if(registry.registry_domain && registry.registry_domain[0])
1025                 snprintf(w->cookie, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Domain=%s; Expires=%s", p->guid, registry.registry_domain, edate);
1026         else
1027                 snprintf(w->cookie, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Expires=%s", p->guid, edate);
1028
1029         w->cookie[COOKIE_MAX] = '\0';
1030 }
1031
1032 static inline void registry_json_header(struct web_client *w, const char *action, const char *status) {
1033         w->response.data->contenttype = CT_APPLICATION_JSON;
1034         buffer_flush(w->response.data);
1035         buffer_sprintf(w->response.data, "{\n\t\"action\": \"%s\",\n\t\"status\": \"%s\",\n\t\"hostname\": \"%s\",\n\t\"machine_guid\": \"%s\"",
1036                                    action, status, registry.hostname, registry.machine_guid);
1037 }
1038
1039 static inline void registry_json_footer(struct web_client *w) {
1040         buffer_strcat(w->response.data, "\n}\n");
1041 }
1042
1043 int registry_request_hello_json(struct web_client *w) {
1044         registry_json_header(w, "hello", REGISTRY_STATUS_OK);
1045
1046         buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"",
1047                                    registry.registry_to_announce);
1048
1049         registry_json_footer(w);
1050         return 200;
1051 }
1052
1053 static inline int registry_json_disabled(struct web_client *w, const char *action) {
1054         registry_json_header(w, action, REGISTRY_STATUS_DISABLED);
1055
1056         buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"",
1057                                    registry.registry_to_announce);
1058
1059         registry_json_footer(w);
1060         return 200;
1061 }
1062
1063 // structure used be the callbacks below
1064 struct registry_json_walk_person_urls_callback {
1065         PERSON *p;
1066         MACHINE *m;
1067         struct web_client *w;
1068         int count;
1069 };
1070
1071 // callback for rendering PERSON_URLs
1072 static inline int registry_json_person_url_callback(void *entry, void *data) {
1073         PERSON_URL *pu = (PERSON_URL *)entry;
1074         struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data;
1075         struct web_client *w = c->w;
1076
1077         if(unlikely(c->count++))
1078                 buffer_strcat(w->response.data, ",");
1079
1080         buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u, \"%s\" ]",
1081                                    pu->machine->guid, pu->url->url, pu->last_t, pu->usages, pu->name);
1082
1083         return 1;
1084 }
1085
1086 // callback for rendering MACHINE_URLs
1087 static inline int registry_json_machine_url_callback(void *entry, void *data) {
1088         MACHINE_URL *mu = (MACHINE_URL *)entry;
1089         struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data;
1090         struct web_client *w = c->w;
1091         MACHINE *m = c->m;
1092
1093         if(unlikely(c->count++))
1094                 buffer_strcat(w->response.data, ",");
1095
1096         buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u ]",
1097                                    m->guid, mu->url->url, mu->last_t, mu->usages);
1098
1099         return 1;
1100 }
1101
1102
1103 // the main method for registering an access
1104 int registry_request_access_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *name, time_t when) {
1105         if(!registry.enabled)
1106                 return registry_json_disabled(w, "access");
1107
1108         PERSON *p = registry_request_access(person_guid, machine_guid, url, name, when);
1109         if(!p) {
1110                 registry_json_header(w, "access", REGISTRY_STATUS_FAILED);
1111                 registry_json_footer(w);
1112                 return 400;
1113         }
1114
1115         // set the cookie
1116         registry_set_person_cookie(w, p);
1117
1118         // generate the response
1119         registry_json_header(w, "access", REGISTRY_STATUS_OK);
1120
1121         buffer_strcat(w->response.data, ",\n\t\"urls\": [");
1122         struct registry_json_walk_person_urls_callback c = { p, NULL, w, 0 };
1123         dictionary_get_all(p->urls, registry_json_person_url_callback, &c);
1124         buffer_strcat(w->response.data, "\n\t]\n");
1125
1126         registry_json_footer(w);
1127         return 200;
1128 }
1129
1130 // the main method for deleting a URL from a person
1131 int registry_request_delete_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) {
1132         if(!registry.enabled)
1133                 return registry_json_disabled(w, "delete");
1134
1135         PERSON *p = registry_request_delete(person_guid, machine_guid, url, delete_url, when);
1136         if(!p) {
1137                 registry_json_header(w, "delete", REGISTRY_STATUS_FAILED);
1138                 registry_json_footer(w);
1139                 return 400;
1140         }
1141
1142         // generate the response
1143         registry_json_header(w, "delete", REGISTRY_STATUS_OK);
1144         registry_json_footer(w);
1145         return 200;
1146 }
1147
1148 // the main method for searching the URLs of a netdata
1149 int registry_request_search_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) {
1150         if(!registry.enabled)
1151                 return registry_json_disabled(w, "search");
1152
1153         MACHINE *m = registry_request_machine(person_guid, machine_guid, url, request_machine, when);
1154         if(!m) {
1155                 registry_json_header(w, "search", REGISTRY_STATUS_FAILED);
1156                 registry_json_footer(w);
1157                 return 400;
1158         }
1159
1160         registry_json_header(w, "search", REGISTRY_STATUS_OK);
1161
1162         buffer_strcat(w->response.data, ",\n\t\"urls\": [");
1163         struct registry_json_walk_person_urls_callback c = { NULL, m, w, 0 };
1164         dictionary_get_all(m->urls, registry_json_machine_url_callback, &c);
1165         buffer_strcat(w->response.data, "\n\t]\n");
1166
1167         registry_json_footer(w);
1168         return 200;
1169 }
1170
1171
1172 // ----------------------------------------------------------------------------
1173 // REGISTRY THIS MACHINE UNIQUE ID
1174
1175 char *registry_get_this_machine_guid(void) {
1176         if(likely(registry.machine_guid[0]))
1177                 return registry.machine_guid;
1178
1179         // read it from disk
1180         int fd = open(registry.machine_guid_filename, O_RDONLY);
1181         if(fd != -1) {
1182                 char buf[36 + 1];
1183                 if(read(fd, buf, 36) != 36)
1184                         error("Failed to read machine GUID from '%s'", registry.machine_guid_filename);
1185                 else {
1186                         buf[36] = '\0';
1187                         if(registry_regenerate_guid(buf, registry.machine_guid) == -1) {
1188                                 error("Failed to validate machine GUID '%s' from '%s'. Ignoring it - this might mean this netdata will appear as duplicate in the registry.",
1189                                           buf, registry.machine_guid_filename);
1190
1191                                 registry.machine_guid[0] = '\0';
1192                         }
1193                 }
1194                 close(fd);
1195         }
1196
1197         // generate a new one?
1198         if(!registry.machine_guid[0]) {
1199                 int count = 10, ret = 0;
1200                 uuid_t uuid;
1201
1202                 // for some reason it reports unsafe generation the first time
1203                 while(count-- && (ret = uuid_generate_time_safe(uuid)) == -1) ;
1204                 uuid_unparse_lower(uuid, registry.machine_guid);
1205                 registry.machine_guid[36] = '\0';
1206
1207                 if(ret == -1)
1208                         info("Warning: generated machine GUID '%s' was not generated using a safe method.", registry.machine_guid);
1209
1210                 // save it
1211                 fd = open(registry.machine_guid_filename, O_WRONLY|O_CREAT|O_TRUNC, 444);
1212                 if(fd == -1)
1213                         fatal("Cannot create unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
1214
1215                 if(write(fd, registry.machine_guid, 36) != 36)
1216                         fatal("Cannot write the unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
1217
1218                 close(fd);
1219         }
1220
1221         return registry.machine_guid;
1222 }
1223
1224
1225 // ----------------------------------------------------------------------------
1226 // REGISTRY LOAD/SAVE
1227
1228 int registry_machine_save_url(void *entry, void *file) {
1229         MACHINE_URL *mu = entry;
1230         FILE *fp = file;
1231
1232         debug(D_REGISTRY, "Registry: registry_machine_save_url('%s')", mu->url->url);
1233
1234         int ret = fprintf(fp, "V\t%08x\t%08x\t%08x\t%02x\t%s\n",
1235                         mu->first_t,
1236                         mu->last_t,
1237                         mu->usages,
1238                         mu->flags,
1239                         mu->url->url
1240         );
1241
1242         // error handling is done at registry_save()
1243
1244         return ret;
1245 }
1246
1247 int registry_machine_save(void *entry, void *file) {
1248         MACHINE *m = entry;
1249         FILE *fp = file;
1250
1251         debug(D_REGISTRY, "Registry: registry_machine_save('%s')", m->guid);
1252
1253         int ret = fprintf(fp, "M\t%08x\t%08x\t%08x\t%s\n",
1254                         m->first_t,
1255                         m->last_t,
1256                         m->usages,
1257                         m->guid
1258         );
1259
1260         if(ret >= 0) {
1261                 int ret2 = dictionary_get_all(m->urls, registry_machine_save_url, fp);
1262                 if(ret2 < 0) return ret2;
1263                 ret += ret2;
1264         }
1265
1266         // error handling is done at registry_save()
1267
1268         return ret;
1269 }
1270
1271 static inline int registry_person_save_url(void *entry, void *file) {
1272         PERSON_URL *pu = entry;
1273         FILE *fp = file;
1274
1275         debug(D_REGISTRY, "Registry: registry_person_save_url('%s')", pu->url->url);
1276
1277         int ret = fprintf(fp, "U\t%08x\t%08x\t%08x\t%02x\t%s\t%s\t%s\n",
1278                         pu->first_t,
1279                         pu->last_t,
1280                         pu->usages,
1281                         pu->flags,
1282                         pu->machine->guid,
1283                         pu->name,
1284                         pu->url->url
1285         );
1286
1287         // error handling is done at registry_save()
1288
1289         return ret;
1290 }
1291
1292 static inline int registry_person_save(void *entry, void *file) {
1293         PERSON *p = entry;
1294         FILE *fp = file;
1295
1296         debug(D_REGISTRY, "Registry: registry_person_save('%s')", p->guid);
1297
1298         int ret = fprintf(fp, "P\t%08x\t%08x\t%08x\t%s\n",
1299                         p->first_t,
1300                         p->last_t,
1301                         p->usages,
1302                         p->guid
1303         );
1304
1305         if(ret >= 0) {
1306                 int ret2 = dictionary_get_all(p->urls, registry_person_save_url, fp);
1307                 if (ret2 < 0) return ret2;
1308                 ret += ret2;
1309         }
1310
1311         // error handling is done at registry_save()
1312
1313         return ret;
1314 }
1315
1316 int registry_save(void) {
1317         if(!registry.enabled) return -1;
1318
1319         // make sure the log is not updated
1320         registry_log_lock();
1321
1322         if(unlikely(!registry_should_save_db())) {
1323                 registry_log_unlock();
1324                 return -2;
1325         }
1326
1327         char tmp_filename[FILENAME_MAX + 1];
1328         char old_filename[FILENAME_MAX + 1];
1329
1330         snprintf(old_filename, FILENAME_MAX, "%s.old", registry.db_filename);
1331         snprintf(tmp_filename, FILENAME_MAX, "%s.tmp", registry.db_filename);
1332
1333         debug(D_REGISTRY, "Registry: Creating file '%s'", tmp_filename);
1334         FILE *fp = fopen(tmp_filename, "w");
1335         if(!fp) {
1336                 error("Registry: Cannot create file: %s", tmp_filename);
1337                 registry_log_unlock();
1338                 return -1;
1339         }
1340
1341         // dictionary_get_all() has its own locking, so this is safe to do
1342
1343         debug(D_REGISTRY, "Saving all machines");
1344         int bytes1 = dictionary_get_all(registry.machines, registry_machine_save, fp);
1345         if(bytes1 < 0) {
1346                 error("Registry: Cannot save registry machines - return value %d", bytes1);
1347                 fclose(fp);
1348                 registry_log_unlock();
1349                 return bytes1;
1350         }
1351         debug(D_REGISTRY, "Registry: saving machines took %d bytes", bytes1);
1352
1353         debug(D_REGISTRY, "Saving all persons");
1354         int bytes2 = dictionary_get_all(registry.persons, registry_person_save, fp);
1355         if(bytes2 < 0) {
1356                 error("Registry: Cannot save registry persons - return value %d", bytes2);
1357                 fclose(fp);
1358                 registry_log_unlock();
1359                 return bytes2;
1360         }
1361         debug(D_REGISTRY, "Registry: saving persons took %d bytes", bytes2);
1362
1363         // save the totals
1364         fprintf(fp, "T\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\n",
1365                         registry.persons_count,
1366                         registry.machines_count,
1367                         registry.usages_count + 1, // this is required - it is lost on db rotation
1368                         registry.urls_count,
1369                         registry.persons_urls_count,
1370                         registry.machines_urls_count
1371         );
1372
1373         fclose(fp);
1374
1375         errno = 0;
1376
1377         // remove the .old db
1378         debug(D_REGISTRY, "Registry: Removing old db '%s'", old_filename);
1379         if(unlink(old_filename) == -1 && errno != ENOENT)
1380                 error("Registry: cannot remove old registry file '%s'", old_filename);
1381
1382         // rename the db to .old
1383         debug(D_REGISTRY, "Registry: Link current db '%s' to .old: '%s'", registry.db_filename, old_filename);
1384         if(link(registry.db_filename, old_filename) == -1 && errno != ENOENT)
1385                 error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename, registry.db_filename);
1386
1387         else {
1388                 // remove the database (it is saved in .old)
1389                 debug(D_REGISTRY, "Registry: removing db '%s'", registry.db_filename);
1390                 if (unlink(registry.db_filename) == -1 && errno != ENOENT)
1391                         error("Registry: cannot remove old registry file '%s'", registry.db_filename);
1392
1393                 // move the .tmp to make it active
1394                 debug(D_REGISTRY, "Registry: linking tmp db '%s' to active db '%s'", tmp_filename, registry.db_filename);
1395                 if (link(tmp_filename, registry.db_filename) == -1) {
1396                         error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename,
1397                                   registry.db_filename);
1398
1399                         // move the .old back
1400                         debug(D_REGISTRY, "Registry: linking old db '%s' to active db '%s'", old_filename, registry.db_filename);
1401                         if(link(old_filename, registry.db_filename) == -1)
1402                                 error("Registry: cannot move file '%s' to '%s'. Recovering the old registry DB failed!", old_filename, registry.db_filename);
1403                 }
1404                 else {
1405                         debug(D_REGISTRY, "Registry: removing tmp db '%s'", tmp_filename);
1406                         if(unlink(tmp_filename) == -1)
1407                                 error("Registry: cannot remove tmp registry file '%s'", tmp_filename);
1408
1409                         // it has been moved successfully
1410                         // discard the current registry log
1411                         registry_log_recreate_nolock();
1412
1413                         registry.log_count = 0;
1414                 }
1415         }
1416
1417         // continue operations
1418         registry_log_unlock();
1419
1420         return -1;
1421 }
1422
1423 static inline size_t registry_load(void) {
1424         char *s, buf[4096 + 1];
1425         PERSON *p = NULL;
1426         MACHINE *m = NULL;
1427         URL *u = NULL;
1428         size_t line = 0;
1429
1430         debug(D_REGISTRY, "Registry: loading active db from: '%s'", registry.db_filename);
1431         FILE *fp = fopen(registry.db_filename, "r");
1432         if(!fp) {
1433                 error("Registry: cannot open registry file: '%s'", registry.db_filename);
1434                 return 0;
1435         }
1436
1437         size_t len = 0;
1438         while((s = fgets_trim_len(buf, 4096, fp, &len))) {
1439                 line++;
1440
1441                 debug(D_REGISTRY, "Registry: read line %zu to length %zu: %s", line, len, s);
1442                 switch(*s) {
1443                         case 'T': // totals
1444                                 if(unlikely(len != 103 || s[1] != '\t' || s[18] != '\t' || s[35] != '\t' || s[52] != '\t' || s[69] != '\t' || s[86] != '\t' || s[103] != '\0')) {
1445                                         error("Registry totals line %u is wrong (len = %zu).", line, len);
1446                                         continue;
1447                                 }
1448                                 registry.persons_count = strtoull(&s[2], NULL, 16);
1449                                 registry.machines_count = strtoull(&s[19], NULL, 16);
1450                                 registry.usages_count = strtoull(&s[36], NULL, 16);
1451                                 registry.urls_count = strtoull(&s[53], NULL, 16);
1452                                 registry.persons_urls_count = strtoull(&s[70], NULL, 16);
1453                                 registry.machines_urls_count = strtoull(&s[87], NULL, 16);
1454                                 break;
1455
1456                         case 'P': // person
1457                                 m = NULL;
1458                                 // verify it is valid
1459                                 if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
1460                                         error("Registry person line %u is wrong (len = %zu).", line, len);
1461                                         continue;
1462                                 }
1463
1464                                 s[1] = s[10] = s[19] = s[28] = '\0';
1465                                 p = registry_person_allocate(&s[29], strtoul(&s[2], NULL, 16));
1466                                 p->last_t = strtoul(&s[11], NULL, 16);
1467                                 p->usages = strtoul(&s[20], NULL, 16);
1468                                 debug(D_REGISTRY, "Registry loaded person '%s', first: %u, last: %u, usages: %u", p->guid, p->first_t, p->last_t, p->usages);
1469                                 break;
1470
1471                         case 'M': // machine
1472                                 p = NULL;
1473                                 // verify it is valid
1474                                 if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
1475                                         error("Registry person line %u is wrong (len = %zu).", line, len);
1476                                         continue;
1477                                 }
1478
1479                                 s[1] = s[10] = s[19] = s[28] = '\0';
1480                                 m = registry_machine_allocate(&s[29], strtoul(&s[2], NULL, 16));
1481                                 m->last_t = strtoul(&s[11], NULL, 16);
1482                                 m->usages = strtoul(&s[20], NULL, 16);
1483                                 debug(D_REGISTRY, "Registry loaded machine '%s', first: %u, last: %u, usages: %u", m->guid, m->first_t, m->last_t, m->usages);
1484                                 break;
1485
1486                         case 'U': // person URL
1487                                 if(unlikely(!p)) {
1488                                         error("Registry: ignoring line %zu, no person loaded: %s", line, s);
1489                                         continue;
1490                                 }
1491
1492                                 // verify it is valid
1493                                 if(len < 69 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t' || s[68] != '\t') {
1494                                         error("Registry person URL line %u is wrong (len = %zu).", line, len);
1495                                         continue;
1496                                 }
1497
1498                                 s[1] = s[10] = s[19] = s[28] = s[31] = s[68] = '\0';
1499
1500                                 // skip the name to find the url
1501                                 char *url = &s[69];
1502                                 while(*url && *url != '\t') url++;
1503                                 if(!*url) {
1504                                         error("Registry person URL line %u does not have a url.", line);
1505                                         continue;
1506                                 }
1507                                 *url++ = '\0';
1508
1509                                 u = registry_url_allocate_nolock(url, strlen(url));
1510
1511                                 time_t first_t = strtoul(&s[2], NULL, 16);
1512
1513                                 m = registry_machine_find(&s[32]);
1514                                 if(!m) m = registry_machine_allocate(&s[32], first_t);
1515
1516                                 PERSON_URL *pu = registry_person_url_allocate(p, m, u, &s[69], strlen(&s[69]), first_t);
1517                                 pu->last_t = strtoul(&s[11], NULL, 16);
1518                                 pu->usages = strtoul(&s[20], NULL, 16);
1519                                 pu->flags = strtoul(&s[29], NULL, 16);
1520                                 debug(D_REGISTRY, "Registry loaded person URL '%s' with name '%s' of machine '%s', first: %u, last: %u, usages: %u, flags: %02x", u->url, pu->name, m->guid, pu->first_t, pu->last_t, pu->usages, pu->flags);
1521                                 break;
1522
1523                         case 'V': // machine URL
1524                                 if(unlikely(!m)) {
1525                                         error("Registry: ignoring line %zu, no machine loaded: %s", line, s);
1526                                         continue;
1527                                 }
1528
1529                                 // verify it is valid
1530                                 if(len < 32 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t') {
1531                                         error("Registry person URL line %u is wrong (len = %zu).", line, len);
1532                                         continue;
1533                                 }
1534
1535                                 s[1] = s[10] = s[19] = s[28] = s[31] = '\0';
1536                                 u = registry_url_allocate_nolock(&s[32], strlen(&s[32]));
1537
1538                                 MACHINE_URL *mu = registry_machine_url_allocate(m, u, strtoul(&s[2], NULL, 16));
1539                                 mu->last_t = strtoul(&s[11], NULL, 16);
1540                                 mu->usages = strtoul(&s[20], NULL, 16);
1541                                 mu->flags = strtoul(&s[29], NULL, 16);
1542                                 debug(D_REGISTRY, "Registry loaded machine URL '%s', machine '%s', first: %u, last: %u, usages: %u, flags: %02x", u->url, m->guid, mu->first_t, mu->last_t, mu->usages, mu->flags);
1543                                 break;
1544
1545                         default:
1546                                 error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.db_filename, s);
1547                                 break;
1548                 }
1549         }
1550         fclose(fp);
1551
1552         return line;
1553 }
1554
1555 // ----------------------------------------------------------------------------
1556 // REGISTRY
1557
1558 int registry_init(void) {
1559         char filename[FILENAME_MAX + 1];
1560
1561         // registry enabled?
1562         registry.enabled = config_get_boolean("registry", "enabled", 0);
1563
1564         // pathnames
1565         registry.pathname = config_get("registry", "registry db directory", VARLIB_DIR "/registry");
1566         if(mkdir(registry.pathname, 0755) == -1 && errno != EEXIST) {
1567                 error("Cannot create directory '%s'. Registry disabled.", registry.pathname);
1568                 registry.enabled = 0;
1569                 return -1;
1570         }
1571
1572         // filenames
1573         snprintf(filename, FILENAME_MAX, "%s/netdata.public.unique.id", registry.pathname);
1574         registry.machine_guid_filename = config_get("registry", "netdata unique id file", filename);
1575         registry_get_this_machine_guid();
1576
1577         snprintf(filename, FILENAME_MAX, "%s/registry.db", registry.pathname);
1578         registry.db_filename = config_get("registry", "registry db file", filename);
1579
1580         snprintf(filename, FILENAME_MAX, "%s/registry-log.db", registry.pathname);
1581         registry.log_filename = config_get("registry", "registry log file", filename);
1582
1583         // configuration options
1584         registry.save_registry_every_entries = config_get_number("registry", "registry save db every new entries", 1000000);
1585         registry.persons_expiration = config_get_number("registry", "registry expire idle persons days", 365) * 86400;
1586         registry.registry_domain = config_get("registry", "registry domain", "");
1587         registry.registry_to_announce = config_get("registry", "registry to announce", "https://registry.my-netdata.io");
1588         registry.hostname = config_get("registry", "registry hostname", config_get("global", "hostname", hostname));
1589
1590         registry.max_url_length = config_get_number("registry", "max URL length", 1024);
1591         registry.max_name_length = config_get_number("registry", "max URL name length", 50);
1592
1593
1594         // initialize entries counters
1595         registry.persons_count = 0;
1596         registry.machines_count = 0;
1597         registry.usages_count = 0;
1598         registry.urls_count = 0;
1599         registry.persons_urls_count = 0;
1600         registry.machines_urls_count = 0;
1601
1602         // initialize memory counters
1603         registry.persons_memory = 0;
1604         registry.machines_memory = 0;
1605         registry.urls_memory = 0;
1606         registry.persons_urls_memory = 0;
1607         registry.machines_urls_memory = 0;
1608
1609         // initialize locks
1610         pthread_mutex_init(&registry.persons_lock, NULL);
1611         pthread_mutex_init(&registry.machines_lock, NULL);
1612         pthread_mutex_init(&registry.urls_lock, NULL);
1613         pthread_mutex_init(&registry.person_urls_lock, NULL);
1614         pthread_mutex_init(&registry.machine_urls_lock, NULL);
1615
1616         // create dictionaries
1617         registry.persons = dictionary_create(DICTIONARY_FLAGS);
1618         registry.machines = dictionary_create(DICTIONARY_FLAGS);
1619         registry.urls = dictionary_create(DICTIONARY_FLAGS);
1620
1621         // load the registry database
1622         if(registry.enabled) {
1623                 registry_log_open_nolock();
1624                 registry_load();
1625                 registry_log_load();
1626         }
1627
1628         return 0;
1629 }
1630
1631 void registry_free(void) {
1632         if(!registry.enabled) return;
1633
1634         // we need to destroy the dictionaries ourselves
1635         // since the dictionaries use memory we allocated
1636
1637         while(registry.persons->values_index.root) {
1638                 PERSON *p = ((NAME_VALUE *)registry.persons->values_index.root)->value;
1639
1640                 // fprintf(stderr, "\nPERSON: '%s', first: %u, last: %u, usages: %u\n", p->guid, p->first_t, p->last_t, p->usages);
1641
1642                 while(p->urls->values_index.root) {
1643                         PERSON_URL *pu = ((NAME_VALUE *)p->urls->values_index.root)->value;
1644
1645                         // fprintf(stderr, "\tURL: '%s', first: %u, last: %u, usages: %u, flags: 0x%02x\n", pu->url->url, pu->first_t, pu->last_t, pu->usages, pu->flags);
1646
1647                         debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", pu->url->url, p->guid);
1648                         dictionary_del(p->urls, pu->url->url);
1649
1650                         debug(D_REGISTRY, "Registry: unlinking url '%s' from person", pu->url->url);
1651                         registry_url_unlink_nolock(pu->url);
1652
1653                         debug(D_REGISTRY, "Registry: freeing person url");
1654                         free(pu);
1655                 }
1656
1657                 debug(D_REGISTRY, "Registry: deleting person '%s' from persons registry", p->guid);
1658                 dictionary_del(registry.persons, p->guid);
1659
1660                 debug(D_REGISTRY, "Registry: destroying URL dictionary of person '%s'", p->guid);
1661                 dictionary_destroy(p->urls);
1662
1663                 debug(D_REGISTRY, "Registry: freeing person '%s'", p->guid);
1664                 free(p);
1665         }
1666
1667         while(registry.machines->values_index.root) {
1668                 MACHINE *m = ((NAME_VALUE *)registry.machines->values_index.root)->value;
1669
1670                 // fprintf(stderr, "\nMACHINE: '%s', first: %u, last: %u, usages: %u\n", m->guid, m->first_t, m->last_t, m->usages);
1671
1672                 while(m->urls->values_index.root) {
1673                         MACHINE_URL *mu = ((NAME_VALUE *)m->urls->values_index.root)->value;
1674
1675                         // fprintf(stderr, "\tURL: '%s', first: %u, last: %u, usages: %u, flags: 0x%02x\n", mu->url->url, mu->first_t, mu->last_t, mu->usages, mu->flags);
1676
1677                         //debug(D_REGISTRY, "Registry: destroying persons dictionary from url '%s'", mu->url->url);
1678                         //dictionary_destroy(mu->persons);
1679
1680                         debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", mu->url->url, m->guid);
1681                         dictionary_del(m->urls, mu->url->url);
1682
1683                         debug(D_REGISTRY, "Registry: unlinking url '%s' from machine", mu->url->url);
1684                         registry_url_unlink_nolock(mu->url);
1685
1686                         debug(D_REGISTRY, "Registry: freeing machine url");
1687                         free(mu);
1688                 }
1689
1690                 debug(D_REGISTRY, "Registry: deleting machine '%s' from machines registry", m->guid);
1691                 dictionary_del(registry.machines, m->guid);
1692
1693                 debug(D_REGISTRY, "Registry: destroying URL dictionary of machine '%s'", m->guid);
1694                 dictionary_destroy(m->urls);
1695
1696                 debug(D_REGISTRY, "Registry: freeing machine '%s'", m->guid);
1697                 free(m);
1698         }
1699
1700         // and free the memory of remaining dictionary structures
1701
1702         debug(D_REGISTRY, "Registry: destroying persons dictionary");
1703         dictionary_destroy(registry.persons);
1704
1705         debug(D_REGISTRY, "Registry: destroying machines dictionary");
1706         dictionary_destroy(registry.machines);
1707
1708         debug(D_REGISTRY, "Registry: destroying urls dictionary");
1709         dictionary_destroy(registry.urls);
1710 }
1711
1712 // ----------------------------------------------------------------------------
1713 // STATISTICS
1714
1715 void registry_statistics(void) {
1716         if(!registry.enabled) return;
1717
1718         static RRDSET *sts = NULL, *stc = NULL, *stm = NULL;
1719
1720         if(!sts) sts = rrdset_find("netdata.registry_sessions");
1721         if(!sts) {
1722                 sts = rrdset_create("netdata", "registry_sessions", NULL, "registry", NULL, "NetData Registry Sessions", "session", 131000, rrd_update_every, RRDSET_TYPE_LINE);
1723
1724                 rrddim_add(sts, "sessions",  NULL,  1, 1, RRDDIM_ABSOLUTE);
1725         }
1726         else rrdset_next(sts);
1727
1728         rrddim_set(sts, "sessions", registry.usages_count);
1729         rrdset_done(sts);
1730
1731         // ------------------------------------------------------------------------
1732
1733         if(!stc) stc = rrdset_find("netdata.registry_entries");
1734         if(!stc) {
1735                 stc = rrdset_create("netdata", "registry_entries", NULL, "registry", NULL, "NetData Registry Entries", "entries", 131100, rrd_update_every, RRDSET_TYPE_LINE);
1736
1737                 rrddim_add(stc, "persons",        NULL,  1, 1, RRDDIM_ABSOLUTE);
1738                 rrddim_add(stc, "machines",       NULL,  1, 1, RRDDIM_ABSOLUTE);
1739                 rrddim_add(stc, "urls",           NULL,  1, 1, RRDDIM_ABSOLUTE);
1740                 rrddim_add(stc, "persons_urls",   NULL,  1, 1, RRDDIM_ABSOLUTE);
1741                 rrddim_add(stc, "machines_urls",  NULL,  1, 1, RRDDIM_ABSOLUTE);
1742         }
1743         else rrdset_next(stc);
1744
1745         rrddim_set(stc, "persons",       registry.persons_count);
1746         rrddim_set(stc, "machines",      registry.machines_count);
1747         rrddim_set(stc, "urls",          registry.urls_count);
1748         rrddim_set(stc, "persons_urls",  registry.persons_urls_count);
1749         rrddim_set(stc, "machines_urls", registry.machines_urls_count);
1750         rrdset_done(stc);
1751
1752         // ------------------------------------------------------------------------
1753
1754         if(!stm) stm = rrdset_find("netdata.registry_mem");
1755         if(!stm) {
1756                 stm = rrdset_create("netdata", "registry_mem", NULL, "registry", NULL, "NetData Registry Memory", "KB", 131300, rrd_update_every, RRDSET_TYPE_STACKED);
1757
1758                 rrddim_add(stm, "persons",        NULL,  1, 1024, RRDDIM_ABSOLUTE);
1759                 rrddim_add(stm, "machines",       NULL,  1, 1024, RRDDIM_ABSOLUTE);
1760                 rrddim_add(stm, "urls",           NULL,  1, 1024, RRDDIM_ABSOLUTE);
1761                 rrddim_add(stm, "persons_urls",   NULL,  1, 1024, RRDDIM_ABSOLUTE);
1762                 rrddim_add(stm, "machines_urls",  NULL,  1, 1024, RRDDIM_ABSOLUTE);
1763         }
1764         else rrdset_next(stm);
1765
1766         rrddim_set(stm, "persons",       registry.persons_memory + registry.persons_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1767         rrddim_set(stm, "machines",      registry.machines_memory + registry.machines_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1768         rrddim_set(stm, "urls",          registry.urls_memory + registry.urls_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1769         rrddim_set(stm, "persons_urls",  registry.persons_urls_memory + registry.persons_count * sizeof(DICTIONARY) + registry.persons_urls_count * sizeof(NAME_VALUE));
1770         rrddim_set(stm, "machines_urls", registry.machines_urls_memory + registry.machines_count * sizeof(DICTIONARY) + registry.machines_urls_count * sizeof(NAME_VALUE));
1771         rrdset_done(stm);
1772 }
1773
1774
1775 #ifdef REGISTRY_STANDALONE_TESTS
1776
1777 // ----------------------------------------------------------------------------
1778 // TESTS
1779
1780 int test1(int argc, char **argv) {
1781
1782         void print_stats(uint32_t requests, unsigned long long start, unsigned long long end) {
1783                 fprintf(stderr, " > SPEED: %u requests served in %0.2f seconds ( >>> %llu per second <<< )\n",
1784                                 requests, (end-start) / 1000000.0, (unsigned long long)requests * 1000000ULL / (end-start));
1785
1786                 fprintf(stderr, " > DB   : persons %llu, machines %llu, unique URLs %llu, accesses %llu, URLs: for persons %llu, for machines %llu\n",
1787                                 registry.persons_count, registry.machines_count, registry.urls_count, registry.usages_count,
1788                                 registry.persons_urls_count, registry.machines_urls_count);
1789         }
1790
1791         (void) argc;
1792         (void) argv;
1793
1794         uint32_t u, users = 1000000;
1795         uint32_t m, machines = 200000;
1796         uint32_t machines2 = machines * 2;
1797
1798         char **users_guids = malloc(users * sizeof(char *));
1799         char **machines_guids = malloc(machines2 * sizeof(char *));
1800         char **machines_urls = malloc(machines2 * sizeof(char *));
1801         unsigned long long start;
1802
1803         registry_init();
1804
1805         fprintf(stderr, "Generating %u machine guids\n", machines2);
1806         for(m = 0; m < machines2 ;m++) {
1807                 uuid_t uuid;
1808                 machines_guids[m] = malloc(36+1);
1809                 uuid_generate(uuid);
1810                 uuid_unparse(uuid, machines_guids[m]);
1811
1812                 char buf[FILENAME_MAX + 1];
1813                 snprintf(buf, FILENAME_MAX, "http://%u.netdata.rocks/", m+1);
1814                 machines_urls[m] = strdup(buf);
1815
1816                 // fprintf(stderr, "\tmachine %u: '%s', url: '%s'\n", m + 1, machines_guids[m], machines_urls[m]);
1817         }
1818
1819         start = timems();
1820         fprintf(stderr, "\nGenerating %u users accessing %u machines\n", users, machines);
1821         m = 0;
1822         time_t now = time(NULL);
1823         for(u = 0; u < users ; u++) {
1824                 if(++m == machines) m = 0;
1825
1826                 PERSON *p = registry_request_access(NULL, machines_guids[m], machines_urls[m], "test", now);
1827                 users_guids[u] = p->guid;
1828         }
1829         print_stats(u, start, timems());
1830
1831         start = timems();
1832         fprintf(stderr, "\nAll %u users accessing again the same %u servers\n", users, machines);
1833         m = 0;
1834         now = time(NULL);
1835         for(u = 0; u < users ; u++) {
1836                 if(++m == machines) m = 0;
1837
1838                 PERSON *p = registry_request_access(users_guids[u], machines_guids[m], machines_urls[m], "test", now);
1839
1840                 if(p->guid != users_guids[u])
1841                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[u], p->guid);
1842         }
1843         print_stats(u, start, timems());
1844
1845         start = timems();
1846         fprintf(stderr, "\nAll %u users accessing a new server, out of the %u servers\n", users, machines);
1847         m = 1;
1848         now = time(NULL);
1849         for(u = 0; u < users ; u++) {
1850                 if(++m == machines) m = 0;
1851
1852                 PERSON *p = registry_request_access(users_guids[u], machines_guids[m], machines_urls[m], "test", now);
1853
1854                 if(p->guid != users_guids[u])
1855                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[u], p->guid);
1856         }
1857         print_stats(u, start, timems());
1858
1859         start = timems();
1860         fprintf(stderr, "\n%u random users accessing a random server, out of the %u servers\n", users, machines);
1861         now = time(NULL);
1862         for(u = 0; u < users ; u++) {
1863                 uint32_t tu = random() * users / RAND_MAX;
1864                 uint32_t tm = random() * machines / RAND_MAX;
1865
1866                 PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], machines_urls[tm], "test", now);
1867
1868                 if(p->guid != users_guids[tu])
1869                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1870         }
1871         print_stats(u, start, timems());
1872
1873         start = timems();
1874         fprintf(stderr, "\n%u random users accessing a random server, out of %u servers\n", users, machines2);
1875         now = time(NULL);
1876         for(u = 0; u < users ; u++) {
1877                 uint32_t tu = random() * users / RAND_MAX;
1878                 uint32_t tm = random() * machines2 / RAND_MAX;
1879
1880                 PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], machines_urls[tm], "test", now);
1881
1882                 if(p->guid != users_guids[tu])
1883                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1884         }
1885         print_stats(u, start, timems());
1886
1887         for(m = 0; m < 10; m++) {
1888                 start = timems();
1889                 fprintf(stderr,
1890                                 "\n%u random user accesses to a random server, out of %u servers,\n > using 1/10000 with a random url, 1/1000 with a mismatched url\n",
1891                                 users * 2, machines2);
1892                 now = time(NULL);
1893                 for (u = 0; u < users * 2; u++) {
1894                         uint32_t tu = random() * users / RAND_MAX;
1895                         uint32_t tm = random() * machines2 / RAND_MAX;
1896
1897                         char *url = machines_urls[tm];
1898                         char buf[FILENAME_MAX + 1];
1899                         if (random() % 10000 == 1234) {
1900                                 snprintf(buf, FILENAME_MAX, "http://random.%ld.netdata.rocks/", random());
1901                                 url = buf;
1902                         }
1903                         else if (random() % 1000 == 123)
1904                                 url = machines_urls[random() * machines2 / RAND_MAX];
1905
1906                         PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], url, "test", now);
1907
1908                         if (p->guid != users_guids[tu])
1909                                 fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1910                 }
1911                 print_stats(u, start, timems());
1912         }
1913
1914         fprintf(stderr, "\n\nSAVE\n");
1915         start = timems();
1916         registry_save();
1917         print_stats(registry.persons_count, start, timems());
1918
1919         fprintf(stderr, "\n\nCLEANUP\n");
1920         start = timems();
1921         registry_free();
1922         print_stats(registry.persons_count, start, timems());
1923         return 0;
1924 }
1925
1926 // ----------------------------------------------------------------------------
1927 // TESTING
1928
1929 int main(int argc, char **argv) {
1930         // debug_flags = 0xFFFFFFFF;
1931         // test1(argc, argv);
1932         // exit(0);
1933
1934         (void)argc;
1935         (void)argv;
1936
1937
1938         PERSON *p1, *p2;
1939
1940         fprintf(stderr, "\n\nINITIALIZATION\n");
1941
1942         registry_init();
1943
1944         int i = 2;
1945
1946         fprintf(stderr, "\n\nADDING ENTRY\n");
1947         p1 = registry_request_access("2c95abd0-1542-11e6-8c66-00508db7e9c9", "7c173980-145c-11e6-b86f-00508db7e9c1", "http://localhost:19999/", "test", time(NULL));
1948
1949         if(0)
1950         while(i--) {
1951 #ifdef REGISTRY_STDOUT_DUMP
1952                 fprintf(stderr, "\n\nADDING ENTRY\n");
1953 #endif /* REGISTRY_STDOUT_DUMP */
1954                 p1 = registry_request_access(NULL, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://localhost:19999/", "test", time(NULL));
1955
1956 #ifdef REGISTRY_STDOUT_DUMP
1957                 fprintf(stderr, "\n\nADDING ANOTHER URL\n");
1958 #endif /* REGISTRY_STDOUT_DUMP */
1959                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://127.0.0.1:19999/", "test", time(NULL));
1960
1961 #ifdef REGISTRY_STDOUT_DUMP
1962                 fprintf(stderr, "\n\nADDING ANOTHER URL\n");
1963 #endif /* REGISTRY_STDOUT_DUMP */
1964                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://my.server:19999/", "test", time(NULL));
1965
1966 #ifdef REGISTRY_STDOUT_DUMP
1967                 fprintf(stderr, "\n\nADDING ANOTHER MACHINE\n");
1968 #endif /* REGISTRY_STDOUT_DUMP */
1969                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://my.server:19999/", "test", time(NULL));
1970
1971 #ifdef REGISTRY_STDOUT_DUMP
1972                 fprintf(stderr, "\n\nADDING ANOTHER PERSON\n");
1973 #endif /* REGISTRY_STDOUT_DUMP */
1974                 p2 = registry_request_access(NULL, "7c173980-145c-11e6-b86f-00508db7e9c3", "http://localhost:19999/", "test", time(NULL));
1975
1976 #ifdef REGISTRY_STDOUT_DUMP
1977                 fprintf(stderr, "\n\nADDING ANOTHER MACHINE\n");
1978 #endif /* REGISTRY_STDOUT_DUMP */
1979                 p2 = registry_request_access(p2->guid, "7c173980-145c-11e6-b86f-00508db7e9c3", "http://localhost:19999/", "test", time(NULL));
1980         }
1981
1982         fprintf(stderr, "\n\nSAVE\n");
1983         registry_save();
1984
1985         fprintf(stderr, "\n\nCLEANUP\n");
1986         registry_free();
1987         return 0;
1988 }
1989
1990 #endif /* REGISTRY_STANDALONE_TESTS */