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         m->guid[36] = '\0';
 429
 430         debug(D_REGISTRY, "Registry: registry_machine_allocate('%s'): creating dictionary of urls", machine_guid);
 431         m->urls = dictionary_create(DICTIONARY_FLAGS);
 432
 433         m->first_t = m->last_t = when;
 434         m->usages = 0;
 435
 436         registry.machines_memory += sizeof(MACHINE);
 437
 438         registry.machines_count++;
 439         dictionary_set(registry.machines, m->guid, m, sizeof(MACHINE));
 440
 441         return m;
 442 }
 443
 444 // 1. validate machine GUID
 445 // 2. if it is valid, find it or create it and return it
 446 // 3. if it is not valid, return NULL
 447 static inline MACHINE *registry_machine_get(const char *machine_guid, time_t when) {
 448         MACHINE *m = NULL;
 449
 450         registry_machines_lock();
 451
 452         if(likely(machine_guid && *machine_guid)) {
 453                 // validate it is a GUID
 454                 char buf[36 + 1];
 455                 if(unlikely(registry_regenerate_guid(machine_guid, buf) == -1))
 456                         info("Registry: machine guid '%s' is not a valid guid. Ignoring it.", machine_guid);
 457                 else {
 458                         machine_guid = buf;
 459                         m = registry_machine_find(machine_guid);
 460                         if(!m) m = registry_machine_allocate(machine_guid, when);
 461                 }
 462         }
 463
 464         registry_machines_unlock();
 465
 466         return m;
 467 }
 468
 469
 470 // ----------------------------------------------------------------------------
 471 // PERSON
 472
 473 static inline PERSON *registry_person_find(const char *person_guid) {
 474         debug(D_REGISTRY, "Registry: registry_person_find('%s')", person_guid);
 475         return dictionary_get(registry.persons, person_guid);
 476 }
 477
 478 static inline PERSON_URL *registry_person_url_allocate(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) {
 479         // protection from too big names
 480         if(namelen > registry.max_name_length)
 481                 namelen = registry.max_name_length;
 482
 483         debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url,
 484                   sizeof(PERSON_URL) + namelen);
 485
 486         PERSON_URL *pu = malloc(sizeof(PERSON_URL) + namelen);
 487         if(!pu) fatal("registry_person_url_allocate('%s', '%s', '%s'): cannot allocate %zu bytes.", p->guid, m->guid, u->url, sizeof(PERSON_URL) + namelen);
 488
 489         // a simple strcpy() should do the job
 490         // but I prefer to be safe, since the caller specified urllen
 491         strncpy(pu->name, name, namelen);
 492         pu->name[namelen] = '\0';
 493
 494         pu->machine = m;
 495         pu->first_t = pu->last_t = when;
 496         pu->usages = 1;
 497         pu->url = u;
 498         pu->flags = REGISTRY_URL_FLAGS_DEFAULT;
 499         m->links++;
 500
 501         registry.persons_urls_memory += sizeof(PERSON_URL) + namelen;
 502
 503         debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, u->url);
 504         dictionary_set(p->urls, u->url, pu, sizeof(PERSON_URL));
 505         registry_url_link_nolock(u);
 506
 507         return pu;
 508 }
 509
 510 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) {
 511         // this function is needed to change the name of a PERSON_URL
 512
 513         debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url,
 514                   sizeof(PERSON_URL) + namelen);
 515
 516         PERSON_URL *tpu = registry_person_url_allocate(p, m, u, name, namelen, when);
 517         tpu->first_t = pu->first_t;
 518         tpu->last_t = pu->last_t;
 519         tpu->usages = pu->usages;
 520
 521         // ok, these are a hack - since the registry_person_url_allocate() is
 522         // adding these, we have to subtract them
 523         tpu->machine->links--;
 524         registry.persons_urls_memory -= sizeof(PERSON_URL) + strlen(pu->name);
 525         registry_url_unlink_nolock(u);
 526
 527         free(pu);
 528
 529         return tpu;
 530 }
 531
 532 static inline PERSON *registry_person_allocate(const char *person_guid, time_t when) {
 533         PERSON *p = NULL;
 534
 535         debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(PERSON));
 536
 537         p = malloc(sizeof(PERSON));
 538         if(!p) fatal("Registry: cannot allocate memory for new person.");
 539
 540         if(!person_guid) {
 541                 for (; ;) {
 542                         uuid_t uuid;
 543                         uuid_generate(uuid);
 544                         uuid_unparse_lower(uuid, p->guid);
 545
 546                         debug(D_REGISTRY, "Registry: Checking if the generated person guid '%s' is unique", p->guid);
 547                         if (!dictionary_get(registry.persons, p->guid)) {
 548                                 debug(D_REGISTRY, "Registry: generated person guid '%s' is unique", p->guid);
 549                                 break;
 550                         }
 551                         else
 552                                 info("Registry: generated person guid '%s' found in the registry. Retrying...", p->guid);
 553                 }
 554         }
 555         else {
 556                 strncpy(p->guid, person_guid, 36);
 557                 p->guid[36] = '\0';
 558         }
 559
 560         debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): creating dictionary of urls", p->guid);
 561         p->urls = dictionary_create(DICTIONARY_FLAGS);
 562
 563         p->first_t = p->last_t = when;
 564         p->usages = 0;
 565
 566         registry.persons_memory += sizeof(PERSON);
 567
 568         registry.persons_count++;
 569         dictionary_set(registry.persons, p->guid, p, sizeof(PERSON));
 570
 571         return p;
 572 }
 573
 574
 575 // 1. validate person GUID
 576 // 2. if it is valid, find it
 577 // 3. if it is not valid, create a new one
 578 // 4. return it
 579 static inline PERSON *registry_person_get(const char *person_guid, time_t when) {
 580         PERSON *p = NULL;
 581
 582         registry_persons_lock();
 583
 584         if(person_guid && *person_guid) {
 585                 char buf[36 + 1];
 586                 // validate it is a GUID
 587                 if(unlikely(registry_regenerate_guid(person_guid, buf) == -1))
 588                         info("Registry: person guid '%s' is not a valid guid. Ignoring it.", person_guid);
 589                 else {
 590                         person_guid = buf;
 591                         p = registry_person_find(person_guid);
 592                         if(!p) person_guid = NULL;
 593                 }
 594         }
 595
 596         if(!p) p = registry_person_allocate(NULL, when);
 597
 598         registry_persons_unlock();
 599
 600         return p;
 601 }
 602
 603 // ----------------------------------------------------------------------------
 604 // LINKING OF OBJECTS
 605
 606 static inline PERSON_URL *registry_person_link_to_url(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) {
 607         debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): searching for URL in person", p->guid, m->guid, u->url);
 608
 609         registry_person_urls_lock(p);
 610
 611         PERSON_URL *pu = dictionary_get(p->urls, u->url);
 612         if(!pu) {
 613                 debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url);
 614                 pu = registry_person_url_allocate(p, m, u, name, namelen, when);
 615                 registry.persons_urls_count++;
 616         }
 617         else {
 618                 debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url);
 619                 pu->usages++;
 620                 if(likely(pu->last_t < when)) pu->last_t = when;
 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         if(likely(p->last_t < when)) 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                 if(likely(mu->last_t < when)) mu->last_t = when;
 672         }
 673
 674         //debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): indexing person in machine", p->guid, m->guid, u->url);
 675         //dictionary_set(mu->persons, p->guid, p, sizeof(PERSON));
 676
 677         m->usages++;
 678         if(likely(m->last_t < when)) m->last_t = when;
 679
 680         if(mu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
 681                 info("registry_machine_link_to_url('%s', '%s', '%s'): accessing an expired URL.", p->guid, m->guid, u->url);
 682                 mu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED;
 683         }
 684
 685         registry_machine_urls_unlock(m);
 686
 687         return mu;
 688 }
 689
 690 // ----------------------------------------------------------------------------
 691 // REGISTRY LOG LOAD/SAVE
 692
 693 static inline int registry_should_save_db(void) {
 694         debug(D_REGISTRY, "log entries %llu, max %llu", registry.log_count, registry.save_registry_every_entries);
 695         return registry.log_count > registry.save_registry_every_entries;
 696 }
 697
 698 static inline void registry_log(const char action, PERSON *p, MACHINE *m, URL *u, char *name) {
 699         if(likely(registry.log_fp)) {
 700                 // we lock only if the file is open
 701                 // to allow replaying the log at registry_log_load()
 702                 registry_log_lock();
 703
 704                 if(unlikely(fprintf(registry.log_fp, "%c\t%08x\t%s\t%s\t%s\t%s\n",
 705                                 action,
 706                                 p->last_t,
 707                                 p->guid,
 708                                 m->guid,
 709                                 name,
 710                                 u->url) < 0))
 711                         error("Registry: failed to save log. Registry data may be lost in case of abnormal restart.");
 712
 713                 // we increase the counter even on failures
 714                 // so that the registry will be saved periodically
 715                 registry.log_count++;
 716
 717                 registry_log_unlock();
 718
 719                 // this must be outside the log_lock(), or a deadlock will happen.
 720                 // registry_save() checks the same inside the log_lock, so only
 721                 // one thread will save the db
 722                 if(unlikely(registry_should_save_db()))
 723                         registry_save();
 724         }
 725 }
 726
 727 static inline int registry_log_open_nolock(void) {
 728         if(registry.log_fp)
 729                 fclose(registry.log_fp);
 730
 731         registry.log_fp = fopen(registry.log_filename, "a");
 732
 733         if(registry.log_fp) {
 734                 if (setvbuf(registry.log_fp, NULL, _IOLBF, 0) != 0)
 735                         error("Cannot set line buffering on registry log file.");
 736                 return 0;
 737         }
 738
 739         error("Cannot open registry log file '%s'. Registry data will be lost in case of netdata or server crash.", registry.log_filename);
 740         return -1;
 741 }
 742
 743 static inline void registry_log_close_nolock(void) {
 744         if(registry.log_fp) {
 745                 fclose(registry.log_fp);
 746                 registry.log_fp = NULL;
 747         }
 748 }
 749
 750 static inline void registry_log_recreate_nolock(void) {
 751         if(registry.log_fp != NULL) {
 752                 registry_log_close_nolock();
 753
 754                 // open it with truncate
 755                 registry.log_fp = fopen(registry.log_filename, "w");
 756                 if(registry.log_fp) fclose(registry.log_fp);
 757                 else error("Cannot truncate registry log '%s'", registry.log_filename);
 758
 759                 registry.log_fp = NULL;
 760
 761                 registry_log_open_nolock();
 762         }
 763 }
 764
 765 int registry_log_load(void) {
 766         char *s, buf[4096 + 1];
 767         size_t line = -1;
 768
 769         // closing the log is required here
 770         // otherwise we will append to it the values we read
 771         registry_log_close_nolock();
 772
 773         debug(D_REGISTRY, "Registry: loading active db from: %s", registry.log_filename);
 774         FILE *fp = fopen(registry.log_filename, "r");
 775         if(!fp)
 776                 error("Registry: cannot open registry file: %s", registry.log_filename);
 777         else {
 778                 line = 0;
 779                 size_t len = 0;
 780                 while ((s = fgets_trim_len(buf, 4096, fp, &len))) {
 781                         line++;
 782
 783                         switch (s[0]) {
 784                                 case 'A': // accesses
 785                                 case 'D': // deletes
 786
 787                                         // verify it is valid
 788                                         if (unlikely(len < 85 || s[1] != '\t' || s[10] != '\t' || s[47] != '\t' || s[84] != '\t')) {
 789                                                 error("Registry: log line %u is wrong (len = %zu).", line, len);
 790                                                 continue;
 791                                         }
 792                                         s[1] = s[10] = s[47] = s[84] = '\0';
 793
 794                                         // get the variables
 795                                         time_t when = strtoul(&s[2], NULL, 16);
 796                                         char *person_guid = &s[11];
 797                                         char *machine_guid = &s[48];
 798                                         char *name = &s[85];
 799
 800                                         // skip the name to find the url
 801                                         char *url = name;
 802                                         while(*url && *url != '\t') url++;
 803                                         if(!*url) {
 804                                                 error("Registry: log line %u does not have a url.", line);
 805                                                 continue;
 806                                         }
 807                                         *url++ = '\0';
 808
 809                                         // make sure the person exists
 810                                         // without this, a new person guid will be created
 811                                         PERSON *p = registry_person_find(person_guid);
 812                                         if(!p) p = registry_person_allocate(person_guid, when);
 813
 814                                         if(s[0] == 'A')
 815                                                 registry_request_access(p->guid, machine_guid, url, name, when);
 816                                         else
 817                                                 registry_request_delete(p->guid, machine_guid, url, name, when);
 818
 819                                         break;
 820
 821                                 default:
 822                                         error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.log_filename, s);
 823                                         break;
 824                         }
 825                 }
 826         }
 827
 828         // open the log again
 829         registry_log_open_nolock();
 830
 831         return line;
 832 }
 833
 834
 835 // ----------------------------------------------------------------------------
 836 // REGISTRY REQUESTS
 837
 838 PERSON *registry_request_access(char *person_guid, char *machine_guid, char *url, char *name, time_t when) {
 839         debug(D_REGISTRY, "registry_request_access('%s', '%s', '%s'): NEW REQUEST", (person_guid)?person_guid:"", machine_guid, url);
 840
 841         MACHINE *m = registry_machine_get(machine_guid, when);
 842         if(!m) return NULL;
 843
 844         // make sure the name is valid
 845         size_t namelen;
 846         name = registry_fix_machine_name(name, &namelen);
 847
 848         size_t urllen;
 849         url = registry_fix_url(url, &urllen);
 850
 851         URL *u = registry_url_get(url, urllen);
 852         PERSON *p = registry_person_get(person_guid, when);
 853
 854         registry_person_link_to_url(p, m, u, name, namelen, when);
 855         registry_machine_link_to_url(p, m, u, when);
 856
 857         registry_log('A', p, m, u, name);
 858
 859         registry.usages_count++;
 860         return p;
 861 }
 862
 863 // verify the person, the machine and the URL exist in our DB
 864 PERSON_URL *registry_verify_request(char *person_guid, char *machine_guid, char *url, PERSON **pp, MACHINE **mm) {
 865         char pbuf[36 + 1], mbuf[36 + 1];
 866
 867         if(!person_guid || !*person_guid || !machine_guid || !*machine_guid || !url || !*url) {
 868                 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");
 869                 return NULL;
 870         }
 871
 872         // normalize the url
 873         url = registry_fix_url(url, NULL);
 874
 875         // make sure the person GUID is valid
 876         if(registry_regenerate_guid(person_guid, pbuf) == -1) {
 877                 info("Registry Request Verification: invalid person GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 878                 return NULL;
 879         }
 880         person_guid = pbuf;
 881
 882         // make sure the machine GUID is valid
 883         if(registry_regenerate_guid(machine_guid, mbuf) == -1) {
 884                 info("Registry Request Verification: invalid machine GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 885                 return NULL;
 886         }
 887         machine_guid = mbuf;
 888
 889         // make sure the machine exists
 890         MACHINE *m = registry_machine_find(machine_guid);
 891         if(!m) {
 892                 info("Registry Request Verification: machine not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 893                 return NULL;
 894         }
 895         if(mm) *mm = m;
 896
 897         // make sure the person exist
 898         PERSON *p = registry_person_find(person_guid);
 899         if(!p) {
 900                 info("Registry Request Verification: person not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 901                 return NULL;
 902         }
 903         if(pp) *pp = p;
 904
 905         PERSON_URL *pu = dictionary_get(p->urls, url);
 906         if(!pu) {
 907                 info("Registry Request Verification: URL not found for person, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url);
 908                 return NULL;
 909         }
 910         return pu;
 911 }
 912
 913 PERSON *registry_request_delete(char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) {
 914         (void)when;
 915
 916         PERSON *p = NULL;
 917         MACHINE *m = NULL;
 918         PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m);
 919         if(!pu || !p || !m) return NULL;
 920
 921         // normalize the url
 922         delete_url = registry_fix_url(delete_url, NULL);
 923
 924         // make sure the user is not deleting the url it uses
 925         if(!strcmp(delete_url, pu->url->url)) {
 926                 info("Registry Delete Request: delete URL is the one currently accessed, person: '%s', machine '%s', url '%s', delete url '%s'", p->guid, m->guid, pu->url->url, delete_url);
 927                 return NULL;
 928         }
 929
 930         registry_person_urls_lock(p);
 931
 932         PERSON_URL *dpu = dictionary_get(p->urls, delete_url);
 933         if(!dpu) {
 934                 info("Registry Delete Request: URL not found for person: '%s', machine '%s', url '%s', delete url '%s'", p->guid, m->guid, pu->url->url, delete_url);
 935                 registry_person_urls_unlock(p);
 936                 return NULL;
 937         }
 938
 939         registry_log('D', p, m, pu->url, dpu->url->url);
 940
 941         dictionary_del(p->urls, dpu->url->url);
 942         registry_url_unlink_nolock(dpu->url);
 943         free(dpu);
 944
 945         registry_person_urls_unlock(p);
 946         return p;
 947 }
 948
 949
 950 // a structure to pass to the dictionary_get_all() callback handler
 951 struct machine_request_callback_data {
 952         MACHINE *find_this_machine;
 953         PERSON_URL *result;
 954 };
 955
 956 // the callback function
 957 // this will be run for every PERSON_URL of this PERSON
 958 int machine_request_callback(void *entry, void *data) {
 959         PERSON_URL *mypu = (PERSON_URL *)entry;
 960         struct machine_request_callback_data *myrdata = (struct machine_request_callback_data *)data;
 961
 962         if(mypu->machine == myrdata->find_this_machine) {
 963                 myrdata->result = mypu;
 964                 return -1; // this will also stop the walk through
 965         }
 966
 967         return 0; // continue
 968 }
 969
 970 MACHINE *registry_request_machine(char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) {
 971         (void)when;
 972
 973         char mbuf[36 + 1];
 974
 975         PERSON *p = NULL;
 976         MACHINE *m = NULL;
 977         PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m);
 978         if(!pu || !p || !m) return NULL;
 979
 980         // make sure the machine GUID is valid
 981         if(registry_regenerate_guid(request_machine, mbuf) == -1) {
 982                 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);
 983                 return NULL;
 984         }
 985         request_machine = mbuf;
 986
 987         // make sure the machine exists
 988         m = registry_machine_find(request_machine);
 989         if(!m) {
 990                 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);
 991                 return NULL;
 992         }
 993
 994         // Verify the user has in the past accessed this machine
 995         // We will walk through the PERSON_URLs to find the machine
 996         // linking to our machine
 997
 998         // a structure to pass to the dictionary_get_all() callback handler
 999         struct machine_request_callback_data rdata = { m, NULL };
1000
1001         // request a walk through on the dictionary
1002         // no need for locking here, the underlying dictionary has its own
1003         dictionary_get_all(p->urls, machine_request_callback, &rdata);
1004
1005         if(rdata.result)
1006                 return m;
1007
1008         return NULL;
1009 }
1010
1011
1012 // ----------------------------------------------------------------------------
1013 // REGISTRY JSON generation
1014
1015 #define REGISTRY_STATUS_OK "ok"
1016 #define REGISTRY_STATUS_FAILED "failed"
1017 #define REGISTRY_STATUS_DISABLED "disabled"
1018
1019 static inline void registry_set_person_cookie(struct web_client *w, PERSON *p) {
1020         char edate[100];
1021         time_t et = time(NULL) + registry.persons_expiration;
1022         struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf);
1023         strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm);
1024
1025         if(registry.registry_domain && registry.registry_domain[0])
1026                 snprintf(w->cookie, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Domain=%s; Expires=%s", p->guid, registry.registry_domain, edate);
1027         else
1028                 snprintf(w->cookie, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Expires=%s", p->guid, edate);
1029
1030         w->cookie[COOKIE_MAX] = '\0';
1031 }
1032
1033 static inline void registry_json_header(struct web_client *w, const char *action, const char *status) {
1034         w->response.data->contenttype = CT_APPLICATION_JSON;
1035         buffer_flush(w->response.data);
1036         buffer_sprintf(w->response.data, "{\n\t\"action\": \"%s\",\n\t\"status\": \"%s\",\n\t\"hostname\": \"%s\",\n\t\"machine_guid\": \"%s\"",
1037                                    action, status, registry.hostname, registry.machine_guid);
1038 }
1039
1040 static inline void registry_json_footer(struct web_client *w) {
1041         buffer_strcat(w->response.data, "\n}\n");
1042 }
1043
1044 int registry_request_hello_json(struct web_client *w) {
1045         registry_json_header(w, "hello", REGISTRY_STATUS_OK);
1046
1047         buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"",
1048                                    registry.registry_to_announce);
1049
1050         registry_json_footer(w);
1051         return 200;
1052 }
1053
1054 static inline int registry_json_disabled(struct web_client *w, const char *action) {
1055         registry_json_header(w, action, REGISTRY_STATUS_DISABLED);
1056
1057         buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"",
1058                                    registry.registry_to_announce);
1059
1060         registry_json_footer(w);
1061         return 200;
1062 }
1063
1064 // structure used be the callbacks below
1065 struct registry_json_walk_person_urls_callback {
1066         PERSON *p;
1067         MACHINE *m;
1068         struct web_client *w;
1069         int count;
1070 };
1071
1072 // callback for rendering PERSON_URLs
1073 static inline int registry_json_person_url_callback(void *entry, void *data) {
1074         PERSON_URL *pu = (PERSON_URL *)entry;
1075         struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data;
1076         struct web_client *w = c->w;
1077
1078         if(unlikely(c->count++))
1079                 buffer_strcat(w->response.data, ",");
1080
1081         buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u, \"%s\" ]",
1082                                    pu->machine->guid, pu->url->url, pu->last_t, pu->usages, pu->name);
1083
1084         return 1;
1085 }
1086
1087 // callback for rendering MACHINE_URLs
1088 static inline int registry_json_machine_url_callback(void *entry, void *data) {
1089         MACHINE_URL *mu = (MACHINE_URL *)entry;
1090         struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data;
1091         struct web_client *w = c->w;
1092         MACHINE *m = c->m;
1093
1094         if(unlikely(c->count++))
1095                 buffer_strcat(w->response.data, ",");
1096
1097         buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u ]",
1098                                    m->guid, mu->url->url, mu->last_t, mu->usages);
1099
1100         return 1;
1101 }
1102
1103
1104 // the main method for registering an access
1105 int registry_request_access_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *name, time_t when) {
1106         if(!registry.enabled)
1107                 return registry_json_disabled(w, "access");
1108
1109         PERSON *p = registry_request_access(person_guid, machine_guid, url, name, when);
1110         if(!p) {
1111                 registry_json_header(w, "access", REGISTRY_STATUS_FAILED);
1112                 registry_json_footer(w);
1113                 return 412;
1114         }
1115
1116         // set the cookie
1117         registry_set_person_cookie(w, p);
1118
1119         // generate the response
1120         registry_json_header(w, "access", REGISTRY_STATUS_OK);
1121
1122         buffer_sprintf(w->response.data, ",\n\t\"person_guid\": \"%s\",\n\t\"urls\": [", p->guid);
1123         struct registry_json_walk_person_urls_callback c = { p, NULL, w, 0 };
1124         dictionary_get_all(p->urls, registry_json_person_url_callback, &c);
1125         buffer_strcat(w->response.data, "\n\t]\n");
1126
1127         registry_json_footer(w);
1128         return 200;
1129 }
1130
1131 // the main method for deleting a URL from a person
1132 int registry_request_delete_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) {
1133         if(!registry.enabled)
1134                 return registry_json_disabled(w, "delete");
1135
1136         PERSON *p = registry_request_delete(person_guid, machine_guid, url, delete_url, when);
1137         if(!p) {
1138                 registry_json_header(w, "delete", REGISTRY_STATUS_FAILED);
1139                 registry_json_footer(w);
1140                 return 412;
1141         }
1142
1143         // generate the response
1144         registry_json_header(w, "delete", REGISTRY_STATUS_OK);
1145         registry_json_footer(w);
1146         return 200;
1147 }
1148
1149 // the main method for searching the URLs of a netdata
1150 int registry_request_search_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) {
1151         if(!registry.enabled)
1152                 return registry_json_disabled(w, "search");
1153
1154         MACHINE *m = registry_request_machine(person_guid, machine_guid, url, request_machine, when);
1155         if(!m) {
1156                 registry_json_header(w, "search", REGISTRY_STATUS_FAILED);
1157                 registry_json_footer(w);
1158                 return 404;
1159         }
1160
1161         registry_json_header(w, "search", REGISTRY_STATUS_OK);
1162
1163         buffer_strcat(w->response.data, ",\n\t\"urls\": [");
1164         struct registry_json_walk_person_urls_callback c = { NULL, m, w, 0 };
1165         dictionary_get_all(m->urls, registry_json_machine_url_callback, &c);
1166         buffer_strcat(w->response.data, "\n\t]\n");
1167
1168         registry_json_footer(w);
1169         return 200;
1170 }
1171
1172
1173 int registry_person_url_callback_verify_machine_exists(void *entry, void *machine) {
1174         PERSON_URL *pu = (PERSON_URL *)entry;
1175         MACHINE *m = (MACHINE *)machine;
1176
1177         if(pu->machine == m)
1178                 return 1;
1179         else
1180                 return 0;
1181 }
1182
1183 // the main method for switching user identity
1184 int registry_request_switch_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *new_person_guid, time_t when) {
1185         (void)url;
1186         (void)when;
1187
1188         if(!registry.enabled)
1189                 return registry_json_disabled(w, "switch");
1190
1191         PERSON *op = registry_person_find(person_guid);
1192         if(!op) {
1193                 registry_json_header(w, "switch", REGISTRY_STATUS_FAILED);
1194                 registry_json_footer(w);
1195                 return 430;
1196         }
1197
1198         PERSON *np = registry_person_find(new_person_guid);
1199         if(!np) {
1200                 registry_json_header(w, "switch", REGISTRY_STATUS_FAILED);
1201                 registry_json_footer(w);
1202                 return 431;
1203         }
1204
1205         MACHINE *m = registry_machine_find(machine_guid);
1206         if(!m) {
1207                 registry_json_header(w, "switch", REGISTRY_STATUS_FAILED);
1208                 registry_json_footer(w);
1209                 return 432;
1210         }
1211
1212         // verify the old person has access to this machine
1213         int count = dictionary_get_all(op->urls, registry_person_url_callback_verify_machine_exists, m);
1214         if(!count) {
1215                 registry_json_header(w, "switch", REGISTRY_STATUS_FAILED);
1216                 registry_json_footer(w);
1217                 return 433;
1218         }
1219
1220         // verify the new person has access to this machine
1221         count = dictionary_get_all(np->urls, registry_person_url_callback_verify_machine_exists, m);
1222         if(!count) {
1223                 registry_json_header(w, "switch", REGISTRY_STATUS_FAILED);
1224                 registry_json_footer(w);
1225                 return 434;
1226         }
1227
1228         // set the cookie of the new person
1229         // the user just switched identity
1230         registry_set_person_cookie(w, np);
1231
1232         // generate the response
1233         registry_json_header(w, "switch", REGISTRY_STATUS_OK);
1234         buffer_sprintf(w->response.data, ",\n\t\"person_guid\": \"%s\"", np->guid);
1235         registry_json_footer(w);
1236         return 200;
1237 }
1238
1239
1240 // ----------------------------------------------------------------------------
1241 // REGISTRY THIS MACHINE UNIQUE ID
1242
1243 char *registry_get_this_machine_guid(void) {
1244         if(likely(registry.machine_guid[0]))
1245                 return registry.machine_guid;
1246
1247         // read it from disk
1248         int fd = open(registry.machine_guid_filename, O_RDONLY);
1249         if(fd != -1) {
1250                 char buf[36 + 1];
1251                 if(read(fd, buf, 36) != 36)
1252                         error("Failed to read machine GUID from '%s'", registry.machine_guid_filename);
1253                 else {
1254                         buf[36] = '\0';
1255                         if(registry_regenerate_guid(buf, registry.machine_guid) == -1) {
1256                                 error("Failed to validate machine GUID '%s' from '%s'. Ignoring it - this might mean this netdata will appear as duplicate in the registry.",
1257                                           buf, registry.machine_guid_filename);
1258
1259                                 registry.machine_guid[0] = '\0';
1260                         }
1261                 }
1262                 close(fd);
1263         }
1264
1265         // generate a new one?
1266         if(!registry.machine_guid[0]) {
1267                 uuid_t uuid;
1268
1269                 uuid_generate_time(uuid);
1270                 uuid_unparse_lower(uuid, registry.machine_guid);
1271                 registry.machine_guid[36] = '\0';
1272
1273                 // save it
1274                 fd = open(registry.machine_guid_filename, O_WRONLY|O_CREAT|O_TRUNC, 444);
1275                 if(fd == -1)
1276                         fatal("Cannot create unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
1277
1278                 if(write(fd, registry.machine_guid, 36) != 36)
1279                         fatal("Cannot write the unique machine id file '%s'. Please fix this.", registry.machine_guid_filename);
1280
1281                 close(fd);
1282         }
1283
1284         return registry.machine_guid;
1285 }
1286
1287
1288 // ----------------------------------------------------------------------------
1289 // REGISTRY LOAD/SAVE
1290
1291 int registry_machine_save_url(void *entry, void *file) {
1292         MACHINE_URL *mu = entry;
1293         FILE *fp = file;
1294
1295         debug(D_REGISTRY, "Registry: registry_machine_save_url('%s')", mu->url->url);
1296
1297         int ret = fprintf(fp, "V\t%08x\t%08x\t%08x\t%02x\t%s\n",
1298                         mu->first_t,
1299                         mu->last_t,
1300                         mu->usages,
1301                         mu->flags,
1302                         mu->url->url
1303         );
1304
1305         // error handling is done at registry_save()
1306
1307         return ret;
1308 }
1309
1310 int registry_machine_save(void *entry, void *file) {
1311         MACHINE *m = entry;
1312         FILE *fp = file;
1313
1314         debug(D_REGISTRY, "Registry: registry_machine_save('%s')", m->guid);
1315
1316         int ret = fprintf(fp, "M\t%08x\t%08x\t%08x\t%s\n",
1317                         m->first_t,
1318                         m->last_t,
1319                         m->usages,
1320                         m->guid
1321         );
1322
1323         if(ret >= 0) {
1324                 int ret2 = dictionary_get_all(m->urls, registry_machine_save_url, fp);
1325                 if(ret2 < 0) return ret2;
1326                 ret += ret2;
1327         }
1328
1329         // error handling is done at registry_save()
1330
1331         return ret;
1332 }
1333
1334 static inline int registry_person_save_url(void *entry, void *file) {
1335         PERSON_URL *pu = entry;
1336         FILE *fp = file;
1337
1338         debug(D_REGISTRY, "Registry: registry_person_save_url('%s')", pu->url->url);
1339
1340         int ret = fprintf(fp, "U\t%08x\t%08x\t%08x\t%02x\t%s\t%s\t%s\n",
1341                         pu->first_t,
1342                         pu->last_t,
1343                         pu->usages,
1344                         pu->flags,
1345                         pu->machine->guid,
1346                         pu->name,
1347                         pu->url->url
1348         );
1349
1350         // error handling is done at registry_save()
1351
1352         return ret;
1353 }
1354
1355 static inline int registry_person_save(void *entry, void *file) {
1356         PERSON *p = entry;
1357         FILE *fp = file;
1358
1359         debug(D_REGISTRY, "Registry: registry_person_save('%s')", p->guid);
1360
1361         int ret = fprintf(fp, "P\t%08x\t%08x\t%08x\t%s\n",
1362                         p->first_t,
1363                         p->last_t,
1364                         p->usages,
1365                         p->guid
1366         );
1367
1368         if(ret >= 0) {
1369                 int ret2 = dictionary_get_all(p->urls, registry_person_save_url, fp);
1370                 if (ret2 < 0) return ret2;
1371                 ret += ret2;
1372         }
1373
1374         // error handling is done at registry_save()
1375
1376         return ret;
1377 }
1378
1379 int registry_save(void) {
1380         if(!registry.enabled) return -1;
1381
1382         // make sure the log is not updated
1383         registry_log_lock();
1384
1385         if(unlikely(!registry_should_save_db())) {
1386                 registry_log_unlock();
1387                 return -2;
1388         }
1389
1390         char tmp_filename[FILENAME_MAX + 1];
1391         char old_filename[FILENAME_MAX + 1];
1392
1393         snprintf(old_filename, FILENAME_MAX, "%s.old", registry.db_filename);
1394         snprintf(tmp_filename, FILENAME_MAX, "%s.tmp", registry.db_filename);
1395
1396         debug(D_REGISTRY, "Registry: Creating file '%s'", tmp_filename);
1397         FILE *fp = fopen(tmp_filename, "w");
1398         if(!fp) {
1399                 error("Registry: Cannot create file: %s", tmp_filename);
1400                 registry_log_unlock();
1401                 return -1;
1402         }
1403
1404         // dictionary_get_all() has its own locking, so this is safe to do
1405
1406         debug(D_REGISTRY, "Saving all machines");
1407         int bytes1 = dictionary_get_all(registry.machines, registry_machine_save, fp);
1408         if(bytes1 < 0) {
1409                 error("Registry: Cannot save registry machines - return value %d", bytes1);
1410                 fclose(fp);
1411                 registry_log_unlock();
1412                 return bytes1;
1413         }
1414         debug(D_REGISTRY, "Registry: saving machines took %d bytes", bytes1);
1415
1416         debug(D_REGISTRY, "Saving all persons");
1417         int bytes2 = dictionary_get_all(registry.persons, registry_person_save, fp);
1418         if(bytes2 < 0) {
1419                 error("Registry: Cannot save registry persons - return value %d", bytes2);
1420                 fclose(fp);
1421                 registry_log_unlock();
1422                 return bytes2;
1423         }
1424         debug(D_REGISTRY, "Registry: saving persons took %d bytes", bytes2);
1425
1426         // save the totals
1427         fprintf(fp, "T\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\n",
1428                         registry.persons_count,
1429                         registry.machines_count,
1430                         registry.usages_count + 1, // this is required - it is lost on db rotation
1431                         registry.urls_count,
1432                         registry.persons_urls_count,
1433                         registry.machines_urls_count
1434         );
1435
1436         fclose(fp);
1437
1438         errno = 0;
1439
1440         // remove the .old db
1441         debug(D_REGISTRY, "Registry: Removing old db '%s'", old_filename);
1442         if(unlink(old_filename) == -1 && errno != ENOENT)
1443                 error("Registry: cannot remove old registry file '%s'", old_filename);
1444
1445         // rename the db to .old
1446         debug(D_REGISTRY, "Registry: Link current db '%s' to .old: '%s'", registry.db_filename, old_filename);
1447         if(link(registry.db_filename, old_filename) == -1 && errno != ENOENT)
1448                 error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename, registry.db_filename);
1449
1450         else {
1451                 // remove the database (it is saved in .old)
1452                 debug(D_REGISTRY, "Registry: removing db '%s'", registry.db_filename);
1453                 if (unlink(registry.db_filename) == -1 && errno != ENOENT)
1454                         error("Registry: cannot remove old registry file '%s'", registry.db_filename);
1455
1456                 // move the .tmp to make it active
1457                 debug(D_REGISTRY, "Registry: linking tmp db '%s' to active db '%s'", tmp_filename, registry.db_filename);
1458                 if (link(tmp_filename, registry.db_filename) == -1) {
1459                         error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename,
1460                                   registry.db_filename);
1461
1462                         // move the .old back
1463                         debug(D_REGISTRY, "Registry: linking old db '%s' to active db '%s'", old_filename, registry.db_filename);
1464                         if(link(old_filename, registry.db_filename) == -1)
1465                                 error("Registry: cannot move file '%s' to '%s'. Recovering the old registry DB failed!", old_filename, registry.db_filename);
1466                 }
1467                 else {
1468                         debug(D_REGISTRY, "Registry: removing tmp db '%s'", tmp_filename);
1469                         if(unlink(tmp_filename) == -1)
1470                                 error("Registry: cannot remove tmp registry file '%s'", tmp_filename);
1471
1472                         // it has been moved successfully
1473                         // discard the current registry log
1474                         registry_log_recreate_nolock();
1475
1476                         registry.log_count = 0;
1477                 }
1478         }
1479
1480         // continue operations
1481         registry_log_unlock();
1482
1483         return -1;
1484 }
1485
1486 static inline size_t registry_load(void) {
1487         char *s, buf[4096 + 1];
1488         PERSON *p = NULL;
1489         MACHINE *m = NULL;
1490         URL *u = NULL;
1491         size_t line = 0;
1492
1493         debug(D_REGISTRY, "Registry: loading active db from: '%s'", registry.db_filename);
1494         FILE *fp = fopen(registry.db_filename, "r");
1495         if(!fp) {
1496                 error("Registry: cannot open registry file: '%s'", registry.db_filename);
1497                 return 0;
1498         }
1499
1500         size_t len = 0;
1501         buf[4096] = '\0';
1502         while((s = fgets_trim_len(buf, 4096, fp, &len))) {
1503                 line++;
1504
1505                 debug(D_REGISTRY, "Registry: read line %zu to length %zu: %s", line, len, s);
1506                 switch(*s) {
1507                         case 'T': // totals
1508                                 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')) {
1509                                         error("Registry totals line %u is wrong (len = %zu).", line, len);
1510                                         continue;
1511                                 }
1512                                 registry.persons_count = strtoull(&s[2], NULL, 16);
1513                                 registry.machines_count = strtoull(&s[19], NULL, 16);
1514                                 registry.usages_count = strtoull(&s[36], NULL, 16);
1515                                 registry.urls_count = strtoull(&s[53], NULL, 16);
1516                                 registry.persons_urls_count = strtoull(&s[70], NULL, 16);
1517                                 registry.machines_urls_count = strtoull(&s[87], NULL, 16);
1518                                 break;
1519
1520                         case 'P': // person
1521                                 m = NULL;
1522                                 // verify it is valid
1523                                 if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
1524                                         error("Registry person line %u is wrong (len = %zu).", line, len);
1525                                         continue;
1526                                 }
1527
1528                                 s[1] = s[10] = s[19] = s[28] = '\0';
1529                                 p = registry_person_allocate(&s[29], strtoul(&s[2], NULL, 16));
1530                                 p->last_t = strtoul(&s[11], NULL, 16);
1531                                 p->usages = strtoul(&s[20], NULL, 16);
1532                                 debug(D_REGISTRY, "Registry loaded person '%s', first: %u, last: %u, usages: %u", p->guid, p->first_t, p->last_t, p->usages);
1533                                 break;
1534
1535                         case 'M': // machine
1536                                 p = NULL;
1537                                 // verify it is valid
1538                                 if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
1539                                         error("Registry person line %u is wrong (len = %zu).", line, len);
1540                                         continue;
1541                                 }
1542
1543                                 s[1] = s[10] = s[19] = s[28] = '\0';
1544                                 m = registry_machine_allocate(&s[29], strtoul(&s[2], NULL, 16));
1545                                 m->last_t = strtoul(&s[11], NULL, 16);
1546                                 m->usages = strtoul(&s[20], NULL, 16);
1547                                 debug(D_REGISTRY, "Registry loaded machine '%s', first: %u, last: %u, usages: %u", m->guid, m->first_t, m->last_t, m->usages);
1548                                 break;
1549
1550                         case 'U': // person URL
1551                                 if(unlikely(!p)) {
1552                                         error("Registry: ignoring line %zu, no person loaded: %s", line, s);
1553                                         continue;
1554                                 }
1555
1556                                 // verify it is valid
1557                                 if(len < 69 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t' || s[68] != '\t') {
1558                                         error("Registry person URL line %u is wrong (len = %zu).", line, len);
1559                                         continue;
1560                                 }
1561
1562                                 s[1] = s[10] = s[19] = s[28] = s[31] = s[68] = '\0';
1563
1564                                 // skip the name to find the url
1565                                 char *url = &s[69];
1566                                 while(*url && *url != '\t') url++;
1567                                 if(!*url) {
1568                                         error("Registry person URL line %u does not have a url.", line);
1569                                         continue;
1570                                 }
1571                                 *url++ = '\0';
1572
1573                                 u = registry_url_allocate_nolock(url, strlen(url));
1574
1575                                 time_t first_t = strtoul(&s[2], NULL, 16);
1576
1577                                 m = registry_machine_find(&s[32]);
1578                                 if(!m) m = registry_machine_allocate(&s[32], first_t);
1579
1580                                 PERSON_URL *pu = registry_person_url_allocate(p, m, u, &s[69], strlen(&s[69]), first_t);
1581                                 pu->last_t = strtoul(&s[11], NULL, 16);
1582                                 pu->usages = strtoul(&s[20], NULL, 16);
1583                                 pu->flags = strtoul(&s[29], NULL, 16);
1584                                 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);
1585                                 break;
1586
1587                         case 'V': // machine URL
1588                                 if(unlikely(!m)) {
1589                                         error("Registry: ignoring line %zu, no machine loaded: %s", line, s);
1590                                         continue;
1591                                 }
1592
1593                                 // verify it is valid
1594                                 if(len < 32 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t') {
1595                                         error("Registry person URL line %u is wrong (len = %zu).", line, len);
1596                                         continue;
1597                                 }
1598
1599                                 s[1] = s[10] = s[19] = s[28] = s[31] = '\0';
1600                                 u = registry_url_allocate_nolock(&s[32], strlen(&s[32]));
1601
1602                                 MACHINE_URL *mu = registry_machine_url_allocate(m, u, strtoul(&s[2], NULL, 16));
1603                                 mu->last_t = strtoul(&s[11], NULL, 16);
1604                                 mu->usages = strtoul(&s[20], NULL, 16);
1605                                 mu->flags = strtoul(&s[29], NULL, 16);
1606                                 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);
1607                                 break;
1608
1609                         default:
1610                                 error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.db_filename, s);
1611                                 break;
1612                 }
1613         }
1614         fclose(fp);
1615
1616         return line;
1617 }
1618
1619 // ----------------------------------------------------------------------------
1620 // REGISTRY
1621
1622 int registry_init(void) {
1623         char filename[FILENAME_MAX + 1];
1624
1625         // registry enabled?
1626         registry.enabled = config_get_boolean("registry", "enabled", 0);
1627
1628         // pathnames
1629         registry.pathname = config_get("registry", "registry db directory", VARLIB_DIR "/registry");
1630         if(mkdir(registry.pathname, 0755) == -1 && errno != EEXIST) {
1631                 error("Cannot create directory '%s'. Registry disabled.", registry.pathname);
1632                 registry.enabled = 0;
1633                 return -1;
1634         }
1635
1636         // filenames
1637         snprintf(filename, FILENAME_MAX, "%s/netdata.public.unique.id", registry.pathname);
1638         registry.machine_guid_filename = config_get("registry", "netdata unique id file", filename);
1639         registry_get_this_machine_guid();
1640
1641         snprintf(filename, FILENAME_MAX, "%s/registry.db", registry.pathname);
1642         registry.db_filename = config_get("registry", "registry db file", filename);
1643
1644         snprintf(filename, FILENAME_MAX, "%s/registry-log.db", registry.pathname);
1645         registry.log_filename = config_get("registry", "registry log file", filename);
1646
1647         // configuration options
1648         registry.save_registry_every_entries = config_get_number("registry", "registry save db every new entries", 1000000);
1649         registry.persons_expiration = config_get_number("registry", "registry expire idle persons days", 365) * 86400;
1650         registry.registry_domain = config_get("registry", "registry domain", "");
1651         registry.registry_to_announce = config_get("registry", "registry to announce", "//registry.my-netdata.io");
1652         registry.hostname = config_get("registry", "registry hostname", config_get("global", "hostname", hostname));
1653
1654         registry.max_url_length = config_get_number("registry", "max URL length", 1024);
1655         registry.max_name_length = config_get_number("registry", "max URL name length", 50);
1656
1657
1658         // initialize entries counters
1659         registry.persons_count = 0;
1660         registry.machines_count = 0;
1661         registry.usages_count = 0;
1662         registry.urls_count = 0;
1663         registry.persons_urls_count = 0;
1664         registry.machines_urls_count = 0;
1665
1666         // initialize memory counters
1667         registry.persons_memory = 0;
1668         registry.machines_memory = 0;
1669         registry.urls_memory = 0;
1670         registry.persons_urls_memory = 0;
1671         registry.machines_urls_memory = 0;
1672
1673         // initialize locks
1674         pthread_mutex_init(&registry.persons_lock, NULL);
1675         pthread_mutex_init(&registry.machines_lock, NULL);
1676         pthread_mutex_init(&registry.urls_lock, NULL);
1677         pthread_mutex_init(&registry.person_urls_lock, NULL);
1678         pthread_mutex_init(&registry.machine_urls_lock, NULL);
1679
1680         // create dictionaries
1681         registry.persons = dictionary_create(DICTIONARY_FLAGS);
1682         registry.machines = dictionary_create(DICTIONARY_FLAGS);
1683         registry.urls = dictionary_create(DICTIONARY_FLAGS);
1684
1685         // load the registry database
1686         if(registry.enabled) {
1687                 registry_log_open_nolock();
1688                 registry_load();
1689                 registry_log_load();
1690         }
1691
1692         return 0;
1693 }
1694
1695 void registry_free(void) {
1696         if(!registry.enabled) return;
1697
1698         // we need to destroy the dictionaries ourselves
1699         // since the dictionaries use memory we allocated
1700
1701         while(registry.persons->values_index.root) {
1702                 PERSON *p = ((NAME_VALUE *)registry.persons->values_index.root)->value;
1703
1704                 // fprintf(stderr, "\nPERSON: '%s', first: %u, last: %u, usages: %u\n", p->guid, p->first_t, p->last_t, p->usages);
1705
1706                 while(p->urls->values_index.root) {
1707                         PERSON_URL *pu = ((NAME_VALUE *)p->urls->values_index.root)->value;
1708
1709                         // 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);
1710
1711                         debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", pu->url->url, p->guid);
1712                         dictionary_del(p->urls, pu->url->url);
1713
1714                         debug(D_REGISTRY, "Registry: unlinking url '%s' from person", pu->url->url);
1715                         registry_url_unlink_nolock(pu->url);
1716
1717                         debug(D_REGISTRY, "Registry: freeing person url");
1718                         free(pu);
1719                 }
1720
1721                 debug(D_REGISTRY, "Registry: deleting person '%s' from persons registry", p->guid);
1722                 dictionary_del(registry.persons, p->guid);
1723
1724                 debug(D_REGISTRY, "Registry: destroying URL dictionary of person '%s'", p->guid);
1725                 dictionary_destroy(p->urls);
1726
1727                 debug(D_REGISTRY, "Registry: freeing person '%s'", p->guid);
1728                 free(p);
1729         }
1730
1731         while(registry.machines->values_index.root) {
1732                 MACHINE *m = ((NAME_VALUE *)registry.machines->values_index.root)->value;
1733
1734                 // fprintf(stderr, "\nMACHINE: '%s', first: %u, last: %u, usages: %u\n", m->guid, m->first_t, m->last_t, m->usages);
1735
1736                 while(m->urls->values_index.root) {
1737                         MACHINE_URL *mu = ((NAME_VALUE *)m->urls->values_index.root)->value;
1738
1739                         // 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);
1740
1741                         //debug(D_REGISTRY, "Registry: destroying persons dictionary from url '%s'", mu->url->url);
1742                         //dictionary_destroy(mu->persons);
1743
1744                         debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", mu->url->url, m->guid);
1745                         dictionary_del(m->urls, mu->url->url);
1746
1747                         debug(D_REGISTRY, "Registry: unlinking url '%s' from machine", mu->url->url);
1748                         registry_url_unlink_nolock(mu->url);
1749
1750                         debug(D_REGISTRY, "Registry: freeing machine url");
1751                         free(mu);
1752                 }
1753
1754                 debug(D_REGISTRY, "Registry: deleting machine '%s' from machines registry", m->guid);
1755                 dictionary_del(registry.machines, m->guid);
1756
1757                 debug(D_REGISTRY, "Registry: destroying URL dictionary of machine '%s'", m->guid);
1758                 dictionary_destroy(m->urls);
1759
1760                 debug(D_REGISTRY, "Registry: freeing machine '%s'", m->guid);
1761                 free(m);
1762         }
1763
1764         // and free the memory of remaining dictionary structures
1765
1766         debug(D_REGISTRY, "Registry: destroying persons dictionary");
1767         dictionary_destroy(registry.persons);
1768
1769         debug(D_REGISTRY, "Registry: destroying machines dictionary");
1770         dictionary_destroy(registry.machines);
1771
1772         debug(D_REGISTRY, "Registry: destroying urls dictionary");
1773         dictionary_destroy(registry.urls);
1774 }
1775
1776 // ----------------------------------------------------------------------------
1777 // STATISTICS
1778
1779 void registry_statistics(void) {
1780         if(!registry.enabled) return;
1781
1782         static RRDSET *sts = NULL, *stc = NULL, *stm = NULL;
1783
1784         if(!sts) sts = rrdset_find("netdata.registry_sessions");
1785         if(!sts) {
1786                 sts = rrdset_create("netdata", "registry_sessions", NULL, "registry", NULL, "NetData Registry Sessions", "session", 131000, rrd_update_every, RRDSET_TYPE_LINE);
1787
1788                 rrddim_add(sts, "sessions",  NULL,  1, 1, RRDDIM_ABSOLUTE);
1789         }
1790         else rrdset_next(sts);
1791
1792         rrddim_set(sts, "sessions", registry.usages_count);
1793         rrdset_done(sts);
1794
1795         // ------------------------------------------------------------------------
1796
1797         if(!stc) stc = rrdset_find("netdata.registry_entries");
1798         if(!stc) {
1799                 stc = rrdset_create("netdata", "registry_entries", NULL, "registry", NULL, "NetData Registry Entries", "entries", 131100, rrd_update_every, RRDSET_TYPE_LINE);
1800
1801                 rrddim_add(stc, "persons",        NULL,  1, 1, RRDDIM_ABSOLUTE);
1802                 rrddim_add(stc, "machines",       NULL,  1, 1, RRDDIM_ABSOLUTE);
1803                 rrddim_add(stc, "urls",           NULL,  1, 1, RRDDIM_ABSOLUTE);
1804                 rrddim_add(stc, "persons_urls",   NULL,  1, 1, RRDDIM_ABSOLUTE);
1805                 rrddim_add(stc, "machines_urls",  NULL,  1, 1, RRDDIM_ABSOLUTE);
1806         }
1807         else rrdset_next(stc);
1808
1809         rrddim_set(stc, "persons",       registry.persons_count);
1810         rrddim_set(stc, "machines",      registry.machines_count);
1811         rrddim_set(stc, "urls",          registry.urls_count);
1812         rrddim_set(stc, "persons_urls",  registry.persons_urls_count);
1813         rrddim_set(stc, "machines_urls", registry.machines_urls_count);
1814         rrdset_done(stc);
1815
1816         // ------------------------------------------------------------------------
1817
1818         if(!stm) stm = rrdset_find("netdata.registry_mem");
1819         if(!stm) {
1820                 stm = rrdset_create("netdata", "registry_mem", NULL, "registry", NULL, "NetData Registry Memory", "KB", 131300, rrd_update_every, RRDSET_TYPE_STACKED);
1821
1822                 rrddim_add(stm, "persons",        NULL,  1, 1024, RRDDIM_ABSOLUTE);
1823                 rrddim_add(stm, "machines",       NULL,  1, 1024, RRDDIM_ABSOLUTE);
1824                 rrddim_add(stm, "urls",           NULL,  1, 1024, RRDDIM_ABSOLUTE);
1825                 rrddim_add(stm, "persons_urls",   NULL,  1, 1024, RRDDIM_ABSOLUTE);
1826                 rrddim_add(stm, "machines_urls",  NULL,  1, 1024, RRDDIM_ABSOLUTE);
1827         }
1828         else rrdset_next(stm);
1829
1830         rrddim_set(stm, "persons",       registry.persons_memory + registry.persons_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1831         rrddim_set(stm, "machines",      registry.machines_memory + registry.machines_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1832         rrddim_set(stm, "urls",          registry.urls_memory + registry.urls_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY));
1833         rrddim_set(stm, "persons_urls",  registry.persons_urls_memory + registry.persons_count * sizeof(DICTIONARY) + registry.persons_urls_count * sizeof(NAME_VALUE));
1834         rrddim_set(stm, "machines_urls", registry.machines_urls_memory + registry.machines_count * sizeof(DICTIONARY) + registry.machines_urls_count * sizeof(NAME_VALUE));
1835         rrdset_done(stm);
1836 }
1837
1838
1839 #ifdef REGISTRY_STANDALONE_TESTS
1840
1841 // ----------------------------------------------------------------------------
1842 // TESTS
1843
1844 int test1(int argc, char **argv) {
1845
1846         void print_stats(uint32_t requests, unsigned long long start, unsigned long long end) {
1847                 fprintf(stderr, " > SPEED: %u requests served in %0.2f seconds ( >>> %llu per second <<< )\n",
1848                                 requests, (end-start) / 1000000.0, (unsigned long long)requests * 1000000ULL / (end-start));
1849
1850                 fprintf(stderr, " > DB   : persons %llu, machines %llu, unique URLs %llu, accesses %llu, URLs: for persons %llu, for machines %llu\n",
1851                                 registry.persons_count, registry.machines_count, registry.urls_count, registry.usages_count,
1852                                 registry.persons_urls_count, registry.machines_urls_count);
1853         }
1854
1855         (void) argc;
1856         (void) argv;
1857
1858         uint32_t u, users = 1000000;
1859         uint32_t m, machines = 200000;
1860         uint32_t machines2 = machines * 2;
1861
1862         char **users_guids = malloc(users * sizeof(char *));
1863         char **machines_guids = malloc(machines2 * sizeof(char *));
1864         char **machines_urls = malloc(machines2 * sizeof(char *));
1865         unsigned long long start;
1866
1867         registry_init();
1868
1869         fprintf(stderr, "Generating %u machine guids\n", machines2);
1870         for(m = 0; m < machines2 ;m++) {
1871                 uuid_t uuid;
1872                 machines_guids[m] = malloc(36+1);
1873                 uuid_generate(uuid);
1874                 uuid_unparse(uuid, machines_guids[m]);
1875
1876                 char buf[FILENAME_MAX + 1];
1877                 snprintf(buf, FILENAME_MAX, "http://%u.netdata.rocks/", m+1);
1878                 machines_urls[m] = strdup(buf);
1879
1880                 // fprintf(stderr, "\tmachine %u: '%s', url: '%s'\n", m + 1, machines_guids[m], machines_urls[m]);
1881         }
1882
1883         start = timems();
1884         fprintf(stderr, "\nGenerating %u users accessing %u machines\n", users, machines);
1885         m = 0;
1886         time_t now = time(NULL);
1887         for(u = 0; u < users ; u++) {
1888                 if(++m == machines) m = 0;
1889
1890                 PERSON *p = registry_request_access(NULL, machines_guids[m], machines_urls[m], "test", now);
1891                 users_guids[u] = p->guid;
1892         }
1893         print_stats(u, start, timems());
1894
1895         start = timems();
1896         fprintf(stderr, "\nAll %u users accessing again the same %u servers\n", users, machines);
1897         m = 0;
1898         now = time(NULL);
1899         for(u = 0; u < users ; u++) {
1900                 if(++m == machines) m = 0;
1901
1902                 PERSON *p = registry_request_access(users_guids[u], machines_guids[m], machines_urls[m], "test", now);
1903
1904                 if(p->guid != users_guids[u])
1905                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[u], p->guid);
1906         }
1907         print_stats(u, start, timems());
1908
1909         start = timems();
1910         fprintf(stderr, "\nAll %u users accessing a new server, out of the %u servers\n", users, machines);
1911         m = 1;
1912         now = time(NULL);
1913         for(u = 0; u < users ; u++) {
1914                 if(++m == machines) m = 0;
1915
1916                 PERSON *p = registry_request_access(users_guids[u], machines_guids[m], machines_urls[m], "test", now);
1917
1918                 if(p->guid != users_guids[u])
1919                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[u], p->guid);
1920         }
1921         print_stats(u, start, timems());
1922
1923         start = timems();
1924         fprintf(stderr, "\n%u random users accessing a random server, out of the %u servers\n", users, machines);
1925         now = time(NULL);
1926         for(u = 0; u < users ; u++) {
1927                 uint32_t tu = random() * users / RAND_MAX;
1928                 uint32_t tm = random() * machines / RAND_MAX;
1929
1930                 PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], machines_urls[tm], "test", now);
1931
1932                 if(p->guid != users_guids[tu])
1933                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1934         }
1935         print_stats(u, start, timems());
1936
1937         start = timems();
1938         fprintf(stderr, "\n%u random users accessing a random server, out of %u servers\n", users, machines2);
1939         now = time(NULL);
1940         for(u = 0; u < users ; u++) {
1941                 uint32_t tu = random() * users / RAND_MAX;
1942                 uint32_t tm = random() * machines2 / RAND_MAX;
1943
1944                 PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], machines_urls[tm], "test", now);
1945
1946                 if(p->guid != users_guids[tu])
1947                         fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1948         }
1949         print_stats(u, start, timems());
1950
1951         for(m = 0; m < 10; m++) {
1952                 start = timems();
1953                 fprintf(stderr,
1954                                 "\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",
1955                                 users * 2, machines2);
1956                 now = time(NULL);
1957                 for (u = 0; u < users * 2; u++) {
1958                         uint32_t tu = random() * users / RAND_MAX;
1959                         uint32_t tm = random() * machines2 / RAND_MAX;
1960
1961                         char *url = machines_urls[tm];
1962                         char buf[FILENAME_MAX + 1];
1963                         if (random() % 10000 == 1234) {
1964                                 snprintf(buf, FILENAME_MAX, "http://random.%ld.netdata.rocks/", random());
1965                                 url = buf;
1966                         }
1967                         else if (random() % 1000 == 123)
1968                                 url = machines_urls[random() * machines2 / RAND_MAX];
1969
1970                         PERSON *p = registry_request_access(users_guids[tu], machines_guids[tm], url, "test", now);
1971
1972                         if (p->guid != users_guids[tu])
1973                                 fprintf(stderr, "ERROR: expected to get user guid '%s' but git '%s'", users_guids[tu], p->guid);
1974                 }
1975                 print_stats(u, start, timems());
1976         }
1977
1978         fprintf(stderr, "\n\nSAVE\n");
1979         start = timems();
1980         registry_save();
1981         print_stats(registry.persons_count, start, timems());
1982
1983         fprintf(stderr, "\n\nCLEANUP\n");
1984         start = timems();
1985         registry_free();
1986         print_stats(registry.persons_count, start, timems());
1987         return 0;
1988 }
1989
1990 // ----------------------------------------------------------------------------
1991 // TESTING
1992
1993 int main(int argc, char **argv) {
1994         // debug_flags = 0xFFFFFFFF;
1995         // test1(argc, argv);
1996         // exit(0);
1997
1998         (void)argc;
1999         (void)argv;
2000
2001
2002         PERSON *p1, *p2;
2003
2004         fprintf(stderr, "\n\nINITIALIZATION\n");
2005
2006         registry_init();
2007
2008         int i = 2;
2009
2010         fprintf(stderr, "\n\nADDING ENTRY\n");
2011         p1 = registry_request_access("2c95abd0-1542-11e6-8c66-00508db7e9c9", "7c173980-145c-11e6-b86f-00508db7e9c1", "http://localhost:19999/", "test", time(NULL));
2012
2013         if(0)
2014         while(i--) {
2015 #ifdef REGISTRY_STDOUT_DUMP
2016                 fprintf(stderr, "\n\nADDING ENTRY\n");
2017 #endif /* REGISTRY_STDOUT_DUMP */
2018                 p1 = registry_request_access(NULL, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://localhost:19999/", "test", time(NULL));
2019
2020 #ifdef REGISTRY_STDOUT_DUMP
2021                 fprintf(stderr, "\n\nADDING ANOTHER URL\n");
2022 #endif /* REGISTRY_STDOUT_DUMP */
2023                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://127.0.0.1:19999/", "test", time(NULL));
2024
2025 #ifdef REGISTRY_STDOUT_DUMP
2026                 fprintf(stderr, "\n\nADDING ANOTHER URL\n");
2027 #endif /* REGISTRY_STDOUT_DUMP */
2028                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://my.server:19999/", "test", time(NULL));
2029
2030 #ifdef REGISTRY_STDOUT_DUMP
2031                 fprintf(stderr, "\n\nADDING ANOTHER MACHINE\n");
2032 #endif /* REGISTRY_STDOUT_DUMP */
2033                 p1 = registry_request_access(p1->guid, "7c173980-145c-11e6-b86f-00508db7e9c1", "http://my.server:19999/", "test", time(NULL));
2034
2035 #ifdef REGISTRY_STDOUT_DUMP
2036                 fprintf(stderr, "\n\nADDING ANOTHER PERSON\n");
2037 #endif /* REGISTRY_STDOUT_DUMP */
2038                 p2 = registry_request_access(NULL, "7c173980-145c-11e6-b86f-00508db7e9c3", "http://localhost:19999/", "test", time(NULL));
2039
2040 #ifdef REGISTRY_STDOUT_DUMP
2041                 fprintf(stderr, "\n\nADDING ANOTHER MACHINE\n");
2042 #endif /* REGISTRY_STDOUT_DUMP */
2043                 p2 = registry_request_access(p2->guid, "7c173980-145c-11e6-b86f-00508db7e9c3", "http://localhost:19999/", "test", time(NULL));
2044         }
2045
2046         fprintf(stderr, "\n\nSAVE\n");
2047         registry_save();
2048
2049         fprintf(stderr, "\n\nCLEANUP\n");
2050         registry_free();
2051         return 0;
2052 }
2053
2054 #endif /* REGISTRY_STANDALONE_TESTS */