diff options
Diffstat (limited to 'src/registry.c')
| -rw-r--r-- | src/registry.c | 1838 |
1 files changed, 1838 insertions, 0 deletions
diff --git a/src/registry.c b/src/registry.c new file mode 100644 index 00000000..f39ce3e2 --- /dev/null +++ b/src/registry.c @@ -0,0 +1,1838 @@ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <uuid/uuid.h> +#include <inttypes.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <errno.h> +#include <fcntl.h> + +#include "log.h" +#include "common.h" +#include "dictionary.h" +#include "appconfig.h" + +#include "web_client.h" +#include "rrd.h" +#include "rrd2json.h" +#include "registry.h" + + +// ---------------------------------------------------------------------------- +// TODO +// +// 1. the default tracking cookie expires in 1 year, but the persons are not +// removed from the db - this means the database only grows - ideally the +// database should be cleaned in registry_save() for both on-disk and +// on-memory entries. +// +// Cleanup: +// i. Find all the PERSONs that have expired cookie +// ii. For each of their PERSON_URLs: +// - decrement the linked MACHINE links +// - if the linked MACHINE has no other links, remove the linked MACHINE too +// - remove the PERSON_URL +// +// 2. add protection to prevent abusing the registry by flooding it with +// requests to fill the memory and crash it. +// +// Possible protections: +// - limit the number of URLs per person +// - limit the number of URLs per machine +// - limit the number of persons +// - limit the number of machines +// - [DONE] limit the size of URLs +// - [DONE] limit the size of PERSON_URL names +// - limit the number of requests that add data to the registry, +// per client IP per hour + + + +#define REGISTRY_URL_FLAGS_DEFAULT 0x00 +#define REGISTRY_URL_FLAGS_EXPIRED 0x01 + +#define DICTIONARY_FLAGS DICTIONARY_FLAG_VALUE_LINK_DONT_CLONE | DICTIONARY_FLAG_NAME_LINK_DONT_CLONE + +// ---------------------------------------------------------------------------- +// COMMON structures + +struct registry { + int enabled; + + char machine_guid[36 + 1]; + + // entries counters / statistics + unsigned long long persons_count; + unsigned long long machines_count; + unsigned long long usages_count; + unsigned long long urls_count; + unsigned long long persons_urls_count; + unsigned long long machines_urls_count; + unsigned long long log_count; + + // memory counters / statistics + unsigned long long persons_memory; + unsigned long long machines_memory; + unsigned long long urls_memory; + unsigned long long persons_urls_memory; + unsigned long long machines_urls_memory; + + // configuration + unsigned long long save_registry_every_entries; + char *registry_domain; + char *hostname; + char *registry_to_announce; + time_t persons_expiration; // seconds to expire idle persons + + size_t max_url_length; + size_t max_name_length; + + // file/path names + char *pathname; + char *db_filename; + char *log_filename; + char *machine_guid_filename; + + // open files + FILE *log_fp; + + // the database + DICTIONARY *persons; // dictionary of PERSON *, with key the PERSON.guid + DICTIONARY *machines; // dictionary of MACHINE *, with key the MACHINE.guid + DICTIONARY *urls; // dictionary of URL *, with key the URL.url + + // concurrency locking + // we keep different locks for different things + // so that many tasks can be completed in parallel + pthread_mutex_t persons_lock; + pthread_mutex_t machines_lock; + pthread_mutex_t urls_lock; + pthread_mutex_t person_urls_lock; + pthread_mutex_t machine_urls_lock; + pthread_mutex_t log_lock; +} registry; + + +// ---------------------------------------------------------------------------- +// URL structures +// Save memory by de-duplicating URLs +// so instead of storing URLs all over the place +// we store them here and we keep pointers elsewhere + +struct url { + uint32_t links; // the number of links to this URL - when none is left, we free it + uint16_t len; // the length of the URL in bytes + char url[1]; // the URL - dynamically allocated to more size +}; +typedef struct url URL; + + +// ---------------------------------------------------------------------------- +// MACHINE structures + +// For each MACHINE-URL pair we keep this +struct machine_url { + URL *url; // de-duplicated URL +// DICTIONARY *persons; // dictionary of PERSON * + + uint8_t flags; + uint32_t first_t; // the first time we saw this + uint32_t last_t; // the last time we saw this + uint32_t usages; // how many times this has been accessed +}; +typedef struct machine_url MACHINE_URL; + +// A machine +struct machine { + char guid[36 + 1]; // the GUID + + uint32_t links; // the number of PERSON_URLs linked to this machine + + DICTIONARY *urls; // MACHINE_URL * + + uint32_t first_t; // the first time we saw this + uint32_t last_t; // the last time we saw this + uint32_t usages; // how many times this has been accessed +}; +typedef struct machine MACHINE; + + +// ---------------------------------------------------------------------------- +// PERSON structures + +// for each PERSON-URL pair we keep this +struct person_url { + URL *url; // de-duplicated URL + MACHINE *machine; // link the MACHINE of this URL + + uint8_t flags; + uint32_t first_t; // the first time we saw this + uint32_t last_t; // the last time we saw this + uint32_t usages; // how many times this has been accessed + + char name[1]; // the name of the URL, as known by the user + // dynamically allocated to fit properly +}; +typedef struct person_url PERSON_URL; + +// A person +struct person { + char guid[36 + 1]; // the person GUID + + DICTIONARY *urls; // dictionary of PERSON_URL * + + uint32_t first_t; // the first time we saw this + uint32_t last_t; // the last time we saw this + uint32_t usages; // how many times this has been accessed +}; +typedef struct person PERSON; + + +// ---------------------------------------------------------------------------- +// REGISTRY concurrency locking + +static inline void registry_persons_lock(void) { + pthread_mutex_lock(®istry.persons_lock); +} + +static inline void registry_persons_unlock(void) { + pthread_mutex_unlock(®istry.persons_lock); +} + +static inline void registry_machines_lock(void) { + pthread_mutex_lock(®istry.machines_lock); +} + +static inline void registry_machines_unlock(void) { + pthread_mutex_unlock(®istry.machines_lock); +} + +static inline void registry_urls_lock(void) { + pthread_mutex_lock(®istry.urls_lock); +} + +static inline void registry_urls_unlock(void) { + pthread_mutex_unlock(®istry.urls_lock); +} + +// ideally, we should not lock the whole registry for +// updating a person's urls. +// however, to save the memory required for keeping a +// mutex (40 bytes) per person, we do... +static inline void registry_person_urls_lock(PERSON *p) { + (void)p; + pthread_mutex_lock(®istry.person_urls_lock); +} + +static inline void registry_person_urls_unlock(PERSON *p) { + (void)p; + pthread_mutex_unlock(®istry.person_urls_lock); +} + +// ideally, we should not lock the whole registry for +// updating a machine's urls. +// however, to save the memory required for keeping a +// mutex (40 bytes) per machine, we do... +static inline void registry_machine_urls_lock(MACHINE *m) { + (void)m; + pthread_mutex_lock(®istry.machine_urls_lock); +} + +static inline void registry_machine_urls_unlock(MACHINE *m) { + (void)m; + pthread_mutex_unlock(®istry.machine_urls_lock); +} + +static inline void registry_log_lock(void) { + pthread_mutex_lock(®istry.log_lock); +} + +static inline void registry_log_unlock(void) { + pthread_mutex_unlock(®istry.log_lock); +} + + +// ---------------------------------------------------------------------------- +// common functions + +// parse a GUID and re-generated to be always lower case +// this is used as a protection against the variations of GUIDs +static inline int registry_regenerate_guid(const char *guid, char *result) { + uuid_t uuid; + if(unlikely(uuid_parse(guid, uuid) == -1)) { + info("Registry: GUID '%s' is not a valid GUID.", guid); + return -1; + } + else { + uuid_unparse_lower(uuid, result); + +#ifdef NETDATA_INTERNAL_CHECKS + if(strcmp(guid, result)) + info("Registry: source GUID '%s' and re-generated GUID '%s' differ!", guid, result); +#endif /* NETDATA_INTERNAL_CHECKS */ + } + + return 0; +} + +// make sure the names of the machines / URLs do not contain any tabs +// (which are used as our separator in the database files) +// and are properly trimmed (before and after) +static inline char *registry_fix_machine_name(char *name, size_t *len) { + char *s = name?name:""; + + // skip leading spaces + while(*s && isspace(*s)) s++; + + // make sure all spaces are a SPACE + char *t = s; + while(*t) { + if(unlikely(isspace(*t))) + *t = ' '; + + t++; + } + + // remove trailing spaces + while(--t >= s) { + if(*t == ' ') + *t = '\0'; + else + break; + } + t++; + + if(likely(len)) + *len = (t - s); + + return s; +} + +static inline char *registry_fix_url(char *url, size_t *len) { + return registry_fix_machine_name(url, len); +} + + +// ---------------------------------------------------------------------------- +// forward definition of functions + +extern PERSON *registry_request_access(char *person_guid, char *machine_guid, char *url, char *name, time_t when); +extern PERSON *registry_request_delete(char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when); + + +// ---------------------------------------------------------------------------- +// URL + +static inline URL *registry_url_allocate_nolock(const char *url, size_t urllen) { + // protection from too big URLs + if(urllen > registry.max_url_length) + urllen = registry.max_url_length; + + debug(D_REGISTRY, "Registry: registry_url_allocate_nolock('%s'): allocating %zu bytes", url, sizeof(URL) + urllen); + URL *u = malloc(sizeof(URL) + urllen); + if(!u) fatal("Cannot allocate %zu bytes for URL '%s'", sizeof(URL) + urllen); + + // a simple strcpy() should do the job + // but I prefer to be safe, since the caller specified urllen + strncpyz(u->url, url, urllen); + + u->len = urllen; + u->links = 0; + + registry.urls_memory += sizeof(URL) + urllen; + + debug(D_REGISTRY, "Registry: registry_url_allocate_nolock('%s'): indexing it", url); + dictionary_set(registry.urls, u->url, u, sizeof(URL)); + + return u; +} + +static inline URL *registry_url_get(const char *url, size_t urllen) { + debug(D_REGISTRY, "Registry: registry_url_get('%s')", url); + + registry_urls_lock(); + + URL *u = dictionary_get(registry.urls, url); + if(!u) { + u = registry_url_allocate_nolock(url, urllen); + registry.urls_count++; + } + + registry_urls_unlock(); + + return u; +} + +static inline void registry_url_link_nolock(URL *u) { + u->links++; + debug(D_REGISTRY, "Registry: registry_url_link_nolock('%s'): URL has now %u links", u->url, u->links); +} + +static inline void registry_url_unlink_nolock(URL *u) { + u->links--; + if(!u->links) { + debug(D_REGISTRY, "Registry: registry_url_unlink_nolock('%s'): No more links for this URL", u->url); + dictionary_del(registry.urls, u->url); + free(u); + } + else + debug(D_REGISTRY, "Registry: registry_url_unlink_nolock('%s'): URL has %u links left", u->url, u->links); +} + + +// ---------------------------------------------------------------------------- +// MACHINE + +static inline MACHINE *registry_machine_find(const char *machine_guid) { + debug(D_REGISTRY, "Registry: registry_machine_find('%s')", machine_guid); + return dictionary_get(registry.machines, machine_guid); +} + +static inline MACHINE_URL *registry_machine_url_allocate(MACHINE *m, URL *u, time_t when) { + debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s'): allocating %zu bytes", m->guid, u->url, sizeof(MACHINE_URL)); + + MACHINE_URL *mu = malloc(sizeof(MACHINE_URL)); + if(!mu) fatal("registry_machine_link_to_url('%s', '%s'): cannot allocate %zu bytes.", m->guid, u->url, sizeof(MACHINE_URL)); + + // mu->persons = dictionary_create(DICTIONARY_FLAGS); + // dictionary_set(mu->persons, p->guid, p, sizeof(PERSON)); + + mu->first_t = mu->last_t = when; + mu->usages = 1; + mu->url = u; + mu->flags = REGISTRY_URL_FLAGS_DEFAULT; + + registry.machines_urls_memory += sizeof(MACHINE_URL); + + debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s'): indexing URL in machine", m->guid, u->url); + dictionary_set(m->urls, u->url, mu, sizeof(MACHINE_URL)); + registry_url_link_nolock(u); + + return mu; +} + +static inline MACHINE *registry_machine_allocate(const char *machine_guid, time_t when) { + debug(D_REGISTRY, "Registry: registry_machine_allocate('%s'): creating new machine, sizeof(MACHINE)=%zu", machine_guid, sizeof(MACHINE)); + + MACHINE *m = malloc(sizeof(MACHINE)); + if(!m) fatal("Registry: cannot allocate memory for new machine '%s'", machine_guid); + + strncpyz(m->guid, machine_guid, 36); + + debug(D_REGISTRY, "Registry: registry_machine_allocate('%s'): creating dictionary of urls", machine_guid); + m->urls = dictionary_create(DICTIONARY_FLAGS); + + m->first_t = m->last_t = when; + m->usages = 0; + + registry.machines_memory += sizeof(MACHINE); + + registry.machines_count++; + dictionary_set(registry.machines, m->guid, m, sizeof(MACHINE)); + + return m; +} + +// 1. validate machine GUID +// 2. if it is valid, find it or create it and return it +// 3. if it is not valid, return NULL +static inline MACHINE *registry_machine_get(const char *machine_guid, time_t when) { + MACHINE *m = NULL; + + registry_machines_lock(); + + if(likely(machine_guid && *machine_guid)) { + // validate it is a GUID + char buf[36 + 1]; + if(unlikely(registry_regenerate_guid(machine_guid, buf) == -1)) + info("Registry: machine guid '%s' is not a valid guid. Ignoring it.", machine_guid); + else { + machine_guid = buf; + m = registry_machine_find(machine_guid); + if(!m) m = registry_machine_allocate(machine_guid, when); + } + } + + registry_machines_unlock(); + + return m; +} + + +// ---------------------------------------------------------------------------- +// PERSON + +static inline PERSON *registry_person_find(const char *person_guid) { + debug(D_REGISTRY, "Registry: registry_person_find('%s')", person_guid); + return dictionary_get(registry.persons, person_guid); +} + +static inline PERSON_URL *registry_person_url_allocate(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) { + // protection from too big names + if(namelen > registry.max_name_length) + namelen = registry.max_name_length; + + debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, + sizeof(PERSON_URL) + namelen); + + PERSON_URL *pu = malloc(sizeof(PERSON_URL) + namelen); + if(!pu) fatal("registry_person_url_allocate('%s', '%s', '%s'): cannot allocate %zu bytes.", p->guid, m->guid, u->url, sizeof(PERSON_URL) + namelen); + + // a simple strcpy() should do the job + // but I prefer to be safe, since the caller specified urllen + strncpyz(pu->name, name, namelen); + + pu->machine = m; + pu->first_t = pu->last_t = when; + pu->usages = 1; + pu->url = u; + pu->flags = REGISTRY_URL_FLAGS_DEFAULT; + m->links++; + + registry.persons_urls_memory += sizeof(PERSON_URL) + namelen; + + debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, u->url); + dictionary_set(p->urls, u->url, pu, sizeof(PERSON_URL)); + registry_url_link_nolock(u); + + return pu; +} + +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) { + // this function is needed to change the name of a PERSON_URL + + debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, + sizeof(PERSON_URL) + namelen); + + PERSON_URL *tpu = registry_person_url_allocate(p, m, u, name, namelen, when); + tpu->first_t = pu->first_t; + tpu->last_t = pu->last_t; + tpu->usages = pu->usages; + + // ok, these are a hack - since the registry_person_url_allocate() is + // adding these, we have to subtract them + tpu->machine->links--; + registry.persons_urls_memory -= sizeof(PERSON_URL) + strlen(pu->name); + registry_url_unlink_nolock(u); + + free(pu); + + return tpu; +} + +static inline PERSON *registry_person_allocate(const char *person_guid, time_t when) { + PERSON *p = NULL; + + debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(PERSON)); + + p = malloc(sizeof(PERSON)); + if(!p) fatal("Registry: cannot allocate memory for new person."); + + if(!person_guid) { + for (; ;) { + uuid_t uuid; + uuid_generate(uuid); + uuid_unparse_lower(uuid, p->guid); + + debug(D_REGISTRY, "Registry: Checking if the generated person guid '%s' is unique", p->guid); + if (!dictionary_get(registry.persons, p->guid)) { + debug(D_REGISTRY, "Registry: generated person guid '%s' is unique", p->guid); + break; + } + else + info("Registry: generated person guid '%s' found in the registry. Retrying...", p->guid); + } + } + else + strncpyz(p->guid, person_guid, 36); + + debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): creating dictionary of urls", p->guid); + p->urls = dictionary_create(DICTIONARY_FLAGS); + + p->first_t = p->last_t = when; + p->usages = 0; + + registry.persons_memory += sizeof(PERSON); + + registry.persons_count++; + dictionary_set(registry.persons, p->guid, p, sizeof(PERSON)); + + return p; +} + + +// 1. validate person GUID +// 2. if it is valid, find it +// 3. if it is not valid, create a new one +// 4. return it +static inline PERSON *registry_person_get(const char *person_guid, time_t when) { + PERSON *p = NULL; + + registry_persons_lock(); + + if(person_guid && *person_guid) { + char buf[36 + 1]; + // validate it is a GUID + if(unlikely(registry_regenerate_guid(person_guid, buf) == -1)) + info("Registry: person guid '%s' is not a valid guid. Ignoring it.", person_guid); + else { + person_guid = buf; + p = registry_person_find(person_guid); + if(!p) person_guid = NULL; + } + } + + if(!p) p = registry_person_allocate(NULL, when); + + registry_persons_unlock(); + + return p; +} + +// ---------------------------------------------------------------------------- +// LINKING OF OBJECTS + +static inline PERSON_URL *registry_person_link_to_url(PERSON *p, MACHINE *m, URL *u, char *name, size_t namelen, time_t when) { + debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): searching for URL in person", p->guid, m->guid, u->url); + + registry_person_urls_lock(p); + + PERSON_URL *pu = dictionary_get(p->urls, u->url); + if(!pu) { + debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url); + pu = registry_person_url_allocate(p, m, u, name, namelen, when); + registry.persons_urls_count++; + } + else { + debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url); + pu->usages++; + if(likely(pu->last_t < when)) pu->last_t = when; + + if(pu->machine != m) { + MACHINE_URL *mu = dictionary_get(pu->machine->urls, u->url); + if(mu) { + info("registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - expiring it from previous machine.", + p->guid, m->guid, u->url, pu->machine->guid); + mu->flags |= REGISTRY_URL_FLAGS_EXPIRED; + } + else { + 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.", + p->guid, m->guid, u->url, pu->machine->guid); + } + + pu->machine->links--; + pu->machine = m; + } + + if(strcmp(pu->name, name)) { + // the name of the PERSON_URL has changed ! + pu = registry_person_url_reallocate(p, m, u, name, namelen, when, pu); + } + } + + p->usages++; + if(likely(p->last_t < when)) p->last_t = when; + + if(pu->flags & REGISTRY_URL_FLAGS_EXPIRED) { + info("registry_person_link_to_url('%s', '%s', '%s'): accessing an expired URL. Re-enabling URL.", p->guid, m->guid, u->url); + pu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED; + } + + registry_person_urls_unlock(p); + + return pu; +} + +static inline MACHINE_URL *registry_machine_link_to_url(PERSON *p, MACHINE *m, URL *u, time_t when) { + debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): searching for URL in machine", p->guid, m->guid, u->url); + + registry_machine_urls_lock(m); + + MACHINE_URL *mu = dictionary_get(m->urls, u->url); + if(!mu) { + debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, u->url); + mu = registry_machine_url_allocate(m, u, when); + registry.machines_urls_count++; + } + else { + debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, u->url); + mu->usages++; + if(likely(mu->last_t < when)) mu->last_t = when; + } + + //debug(D_REGISTRY, "registry_machine_link_to_url('%s', '%s', '%s'): indexing person in machine", p->guid, m->guid, u->url); + //dictionary_set(mu->persons, p->guid, p, sizeof(PERSON)); + + m->usages++; + if(likely(m->last_t < when)) m->last_t = when; + + if(mu->flags & REGISTRY_URL_FLAGS_EXPIRED) { + info("registry_machine_link_to_url('%s', '%s', '%s'): accessing an expired URL.", p->guid, m->guid, u->url); + mu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED; + } + + registry_machine_urls_unlock(m); + + return mu; +} + +// ---------------------------------------------------------------------------- +// REGISTRY LOG LOAD/SAVE + +static inline int registry_should_save_db(void) { + debug(D_REGISTRY, "log entries %llu, max %llu", registry.log_count, registry.save_registry_every_entries); + return registry.log_count > registry.save_registry_every_entries; +} + +static inline void registry_log(const char action, PERSON *p, MACHINE *m, URL *u, char *name) { + if(likely(registry.log_fp)) { + // we lock only if the file is open + // to allow replaying the log at registry_log_load() + registry_log_lock(); + + if(unlikely(fprintf(registry.log_fp, "%c\t%08x\t%s\t%s\t%s\t%s\n", + action, + p->last_t, + p->guid, + m->guid, + name, + u->url) < 0)) + error("Registry: failed to save log. Registry data may be lost in case of abnormal restart."); + + // we increase the counter even on failures + // so that the registry will be saved periodically + registry.log_count++; + + registry_log_unlock(); + + // this must be outside the log_lock(), or a deadlock will happen. + // registry_save() checks the same inside the log_lock, so only + // one thread will save the db + if(unlikely(registry_should_save_db())) + registry_save(); + } +} + +static inline int registry_log_open_nolock(void) { + if(registry.log_fp) + fclose(registry.log_fp); + + registry.log_fp = fopen(registry.log_filename, "a"); + + if(registry.log_fp) { + if (setvbuf(registry.log_fp, NULL, _IOLBF, 0) != 0) + error("Cannot set line buffering on registry log file."); + return 0; + } + + error("Cannot open registry log file '%s'. Registry data will be lost in case of netdata or server crash.", registry.log_filename); + return -1; +} + +static inline void registry_log_close_nolock(void) { + if(registry.log_fp) { + fclose(registry.log_fp); + registry.log_fp = NULL; + } +} + +static inline void registry_log_recreate_nolock(void) { + if(registry.log_fp != NULL) { + registry_log_close_nolock(); + + // open it with truncate + registry.log_fp = fopen(registry.log_filename, "w"); + if(registry.log_fp) fclose(registry.log_fp); + else error("Cannot truncate registry log '%s'", registry.log_filename); + + registry.log_fp = NULL; + + registry_log_open_nolock(); + } +} + +int registry_log_load(void) { + char *s, buf[4096 + 1]; + size_t line = -1; + + // closing the log is required here + // otherwise we will append to it the values we read + registry_log_close_nolock(); + + debug(D_REGISTRY, "Registry: loading active db from: %s", registry.log_filename); + FILE *fp = fopen(registry.log_filename, "r"); + if(!fp) + error("Registry: cannot open registry file: %s", registry.log_filename); + else { + line = 0; + size_t len = 0; + while ((s = fgets_trim_len(buf, 4096, fp, &len))) { + line++; + + switch (s[0]) { + case 'A': // accesses + case 'D': // deletes + + // verify it is valid + if (unlikely(len < 85 || s[1] != '\t' || s[10] != '\t' || s[47] != '\t' || s[84] != '\t')) { + error("Registry: log line %u is wrong (len = %zu).", line, len); + continue; + } + s[1] = s[10] = s[47] = s[84] = '\0'; + + // get the variables + time_t when = strtoul(&s[2], NULL, 16); + char *person_guid = &s[11]; + char *machine_guid = &s[48]; + char *name = &s[85]; + + // skip the name to find the url + char *url = name; + while(*url && *url != '\t') url++; + if(!*url) { + error("Registry: log line %u does not have a url.", line); + continue; + } + *url++ = '\0'; + + // make sure the person exists + // without this, a new person guid will be created + PERSON *p = registry_person_find(person_guid); + if(!p) p = registry_person_allocate(person_guid, when); + + if(s[0] == 'A') + registry_request_access(p->guid, machine_guid, url, name, when); + else + registry_request_delete(p->guid, machine_guid, url, name, when); + + break; + + default: + error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.log_filename, s); + break; + } + } + } + + // open the log again + registry_log_open_nolock(); + + return line; +} + + +// ---------------------------------------------------------------------------- +// REGISTRY REQUESTS + +PERSON *registry_request_access(char *person_guid, char *machine_guid, char *url, char *name, time_t when) { + debug(D_REGISTRY, "registry_request_access('%s', '%s', '%s'): NEW REQUEST", (person_guid)?person_guid:"", machine_guid, url); + + MACHINE *m = registry_machine_get(machine_guid, when); + if(!m) return NULL; + + // make sure the name is valid + size_t namelen; + name = registry_fix_machine_name(name, &namelen); + + size_t urllen; + url = registry_fix_url(url, &urllen); + + URL *u = registry_url_get(url, urllen); + PERSON *p = registry_person_get(person_guid, when); + + registry_person_link_to_url(p, m, u, name, namelen, when); + registry_machine_link_to_url(p, m, u, when); + + registry_log('A', p, m, u, name); + + registry.usages_count++; + return p; +} + +// verify the person, the machine and the URL exist in our DB +PERSON_URL *registry_verify_request(char *person_guid, char *machine_guid, char *url, PERSON **pp, MACHINE **mm) { + char pbuf[36 + 1], mbuf[36 + 1]; + + if(!person_guid || !*person_guid || !machine_guid || !*machine_guid || !url || !*url) { + 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"); + return NULL; + } + + // normalize the url + url = registry_fix_url(url, NULL); + + // make sure the person GUID is valid + if(registry_regenerate_guid(person_guid, pbuf) == -1) { + info("Registry Request Verification: invalid person GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url); + return NULL; + } + person_guid = pbuf; + + // make sure the machine GUID is valid + if(registry_regenerate_guid(machine_guid, mbuf) == -1) { + info("Registry Request Verification: invalid machine GUID, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url); + return NULL; + } + machine_guid = mbuf; + + // make sure the machine exists + MACHINE *m = registry_machine_find(machine_guid); + if(!m) { + info("Registry Request Verification: machine not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url); + return NULL; + } + if(mm) *mm = m; + + // make sure the person exist + PERSON *p = registry_person_find(person_guid); + if(!p) { + info("Registry Request Verification: person not found, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url); + return NULL; + } + if(pp) *pp = p; + + PERSON_URL *pu = dictionary_get(p->urls, url); + if(!pu) { + info("Registry Request Verification: URL not found for person, person: '%s', machine '%s', url '%s'", person_guid, machine_guid, url); + return NULL; + } + return pu; +} + +PERSON *registry_request_delete(char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) { + (void)when; + + PERSON *p = NULL; + MACHINE *m = NULL; + PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m); + if(!pu || !p || !m) return NULL; + + // normalize the url + delete_url = registry_fix_url(delete_url, NULL); + + // make sure the user is not deleting the url it uses + if(!strcmp(delete_url, pu->url->url)) { + 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); + return NULL; + } + + registry_person_urls_lock(p); + + PERSON_URL *dpu = dictionary_get(p->urls, delete_url); + if(!dpu) { + 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); + registry_person_urls_unlock(p); + return NULL; + } + + registry_log('D', p, m, pu->url, dpu->url->url); + + dictionary_del(p->urls, dpu->url->url); + registry_url_unlink_nolock(dpu->url); + free(dpu); + + registry_person_urls_unlock(p); + return p; +} + + +// a structure to pass to the dictionary_get_all() callback handler +struct machine_request_callback_data { + MACHINE *find_this_machine; + PERSON_URL *result; +}; + +// the callback function +// this will be run for every PERSON_URL of this PERSON +int machine_request_callback(void *entry, void *data) { + PERSON_URL *mypu = (PERSON_URL *)entry; + struct machine_request_callback_data *myrdata = (struct machine_request_callback_data *)data; + + if(mypu->machine == myrdata->find_this_machine) { + myrdata->result = mypu; + return -1; // this will also stop the walk through + } + + return 0; // continue +} + +MACHINE *registry_request_machine(char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) { + (void)when; + + char mbuf[36 + 1]; + + PERSON *p = NULL; + MACHINE *m = NULL; + PERSON_URL *pu = registry_verify_request(person_guid, machine_guid, url, &p, &m); + if(!pu || !p || !m) return NULL; + + // make sure the machine GUID is valid + if(registry_regenerate_guid(request_machine, mbuf) == -1) { + 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); + return NULL; + } + request_machine = mbuf; + + // make sure the machine exists + m = registry_machine_find(request_machine); + if(!m) { + 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); + return NULL; + } + + // Verify the user has in the past accessed this machine + // We will walk through the PERSON_URLs to find the machine + // linking to our machine + + // a structure to pass to the dictionary_get_all() callback handler + struct machine_request_callback_data rdata = { m, NULL }; + + // request a walk through on the dictionary + // no need for locking here, the underlying dictionary has its own + dictionary_get_all(p->urls, machine_request_callback, &rdata); + + if(rdata.result) + return m; + + return NULL; +} + + +// ---------------------------------------------------------------------------- +// REGISTRY JSON generation + +#define REGISTRY_STATUS_OK "ok" +#define REGISTRY_STATUS_FAILED "failed" +#define REGISTRY_STATUS_DISABLED "disabled" + +static inline void registry_set_person_cookie(struct web_client *w, PERSON *p) { + char edate[100]; + time_t et = time(NULL) + registry.persons_expiration; + struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf); + strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm); + + snprintfz(w->cookie1, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Expires=%s", p->guid, edate); + + if(registry.registry_domain && registry.registry_domain[0]) + snprintfz(w->cookie2, COOKIE_MAX, NETDATA_REGISTRY_COOKIE_NAME "=%s; Domain=%s; Expires=%s", p->guid, registry.registry_domain, edate); +} + +static inline void registry_json_header(struct web_client *w, const char *action, const char *status) { + w->response.data->contenttype = CT_APPLICATION_JSON; + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "{\n\t\"action\": \"%s\",\n\t\"status\": \"%s\",\n\t\"hostname\": \"%s\",\n\t\"machine_guid\": \"%s\"", + action, status, registry.hostname, registry.machine_guid); +} + +static inline void registry_json_footer(struct web_client *w) { + buffer_strcat(w->response.data, "\n}\n"); +} + +int registry_request_hello_json(struct web_client *w) { + registry_json_header(w, "hello", REGISTRY_STATUS_OK); + + buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"", + registry.registry_to_announce); + + registry_json_footer(w); + return 200; +} + +static inline int registry_json_disabled(struct web_client *w, const char *action) { + registry_json_header(w, action, REGISTRY_STATUS_DISABLED); + + buffer_sprintf(w->response.data, ",\n\t\"registry\": \"%s\"", + registry.registry_to_announce); + + registry_json_footer(w); + return 200; +} + +// structure used be the callbacks below +struct registry_json_walk_person_urls_callback { + PERSON *p; + MACHINE *m; + struct web_client *w; + int count; +}; + +// callback for rendering PERSON_URLs +static inline int registry_json_person_url_callback(void *entry, void *data) { + PERSON_URL *pu = (PERSON_URL *)entry; + struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data; + struct web_client *w = c->w; + + if(unlikely(c->count++)) + buffer_strcat(w->response.data, ","); + + buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u, \"%s\" ]", + pu->machine->guid, pu->url->url, pu->last_t, pu->usages, pu->name); + + return 1; +} + +// callback for rendering MACHINE_URLs +static inline int registry_json_machine_url_callback(void *entry, void *data) { + MACHINE_URL *mu = (MACHINE_URL *)entry; + struct registry_json_walk_person_urls_callback *c = (struct registry_json_walk_person_urls_callback *)data; + struct web_client *w = c->w; + MACHINE *m = c->m; + + if(unlikely(c->count++)) + buffer_strcat(w->response.data, ","); + + buffer_sprintf(w->response.data, "\n\t\t[ \"%s\", \"%s\", %u000, %u ]", + m->guid, mu->url->url, mu->last_t, mu->usages); + + return 1; +} + + +// the main method for registering an access +int registry_request_access_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *name, time_t when) { + if(!registry.enabled) + return registry_json_disabled(w, "access"); + + PERSON *p = registry_request_access(person_guid, machine_guid, url, name, when); + if(!p) { + registry_json_header(w, "access", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 412; + } + + // set the cookie + registry_set_person_cookie(w, p); + + // generate the response + registry_json_header(w, "access", REGISTRY_STATUS_OK); + + buffer_sprintf(w->response.data, ",\n\t\"person_guid\": \"%s\",\n\t\"urls\": [", p->guid); + struct registry_json_walk_person_urls_callback c = { p, NULL, w, 0 }; + dictionary_get_all(p->urls, registry_json_person_url_callback, &c); + buffer_strcat(w->response.data, "\n\t]\n"); + + registry_json_footer(w); + return 200; +} + +// the main method for deleting a URL from a person +int registry_request_delete_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *delete_url, time_t when) { + if(!registry.enabled) + return registry_json_disabled(w, "delete"); + + PERSON *p = registry_request_delete(person_guid, machine_guid, url, delete_url, when); + if(!p) { + registry_json_header(w, "delete", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 412; + } + + // generate the response + registry_json_header(w, "delete", REGISTRY_STATUS_OK); + registry_json_footer(w); + return 200; +} + +// the main method for searching the URLs of a netdata +int registry_request_search_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *request_machine, time_t when) { + if(!registry.enabled) + return registry_json_disabled(w, "search"); + + MACHINE *m = registry_request_machine(person_guid, machine_guid, url, request_machine, when); + if(!m) { + registry_json_header(w, "search", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 404; + } + + registry_json_header(w, "search", REGISTRY_STATUS_OK); + + buffer_strcat(w->response.data, ",\n\t\"urls\": ["); + struct registry_json_walk_person_urls_callback c = { NULL, m, w, 0 }; + dictionary_get_all(m->urls, registry_json_machine_url_callback, &c); + buffer_strcat(w->response.data, "\n\t]\n"); + + registry_json_footer(w); + return 200; +} + +// structure used be the callbacks below +struct registry_person_url_callback_verify_machine_exists_data { + MACHINE *m; + int count; +}; + +int registry_person_url_callback_verify_machine_exists(void *entry, void *data) { + struct registry_person_url_callback_verify_machine_exists_data *d = (struct registry_person_url_callback_verify_machine_exists_data *)data; + PERSON_URL *pu = (PERSON_URL *)entry; + MACHINE *m = d->m; + + if(pu->machine == m) + d->count++; + + return 0; +} + +// the main method for switching user identity +int registry_request_switch_json(struct web_client *w, char *person_guid, char *machine_guid, char *url, char *new_person_guid, time_t when) { + (void)url; + (void)when; + + if(!registry.enabled) + return registry_json_disabled(w, "switch"); + + PERSON *op = registry_person_find(person_guid); + if(!op) { + registry_json_header(w, "switch", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 430; + } + + PERSON *np = registry_person_find(new_person_guid); + if(!np) { + registry_json_header(w, "switch", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 431; + } + + MACHINE *m = registry_machine_find(machine_guid); + if(!m) { + registry_json_header(w, "switch", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 432; + } + + struct registry_person_url_callback_verify_machine_exists_data data = { m, 0 }; + + // verify the old person has access to this machine + dictionary_get_all(op->urls, registry_person_url_callback_verify_machine_exists, &data); + if(!data.count) { + registry_json_header(w, "switch", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 433; + } + + // verify the new person has access to this machine + data.count = 0; + dictionary_get_all(np->urls, registry_person_url_callback_verify_machine_exists, &data); + if(!data.count) { + registry_json_header(w, "switch", REGISTRY_STATUS_FAILED); + registry_json_footer(w); + return 434; + } + + // set the cookie of the new person + // the user just switched identity + registry_set_person_cookie(w, np); + + // generate the response + registry_json_header(w, "switch", REGISTRY_STATUS_OK); + buffer_sprintf(w->response.data, ",\n\t\"person_guid\": \"%s\"", np->guid); + registry_json_footer(w); + return 200; +} + + +// ---------------------------------------------------------------------------- +// REGISTRY THIS MACHINE UNIQUE ID + +char *registry_get_this_machine_guid(void) { + if(likely(registry.machine_guid[0])) + return registry.machine_guid; + + // read it from disk + int fd = open(registry.machine_guid_filename, O_RDONLY); + if(fd != -1) { + char buf[36 + 1]; + if(read(fd, buf, 36) != 36) + error("Failed to read machine GUID from '%s'", registry.machine_guid_filename); + else { + buf[36] = '\0'; + if(registry_regenerate_guid(buf, registry.machine_guid) == -1) { + error("Failed to validate machine GUID '%s' from '%s'. Ignoring it - this might mean this netdata will appear as duplicate in the registry.", + buf, registry.machine_guid_filename); + + registry.machine_guid[0] = '\0'; + } + } + close(fd); + } + + // generate a new one? + if(!registry.machine_guid[0]) { + uuid_t uuid; + + uuid_generate_time(uuid); + uuid_unparse_lower(uuid, registry.machine_guid); + registry.machine_guid[36] = '\0'; + + // save it + fd = open(registry.machine_guid_filename, O_WRONLY|O_CREAT|O_TRUNC, 444); + if(fd == -1) + fatal("Cannot create unique machine id file '%s'. Please fix this.", registry.machine_guid_filename); + + if(write(fd, registry.machine_guid, 36) != 36) + fatal("Cannot write the unique machine id file '%s'. Please fix this.", registry.machine_guid_filename); + + close(fd); + } + + return registry.machine_guid; +} + + +// ---------------------------------------------------------------------------- +// REGISTRY LOAD/SAVE + +int registry_machine_save_url(void *entry, void *file) { + MACHINE_URL *mu = entry; + FILE *fp = file; + + debug(D_REGISTRY, "Registry: registry_machine_save_url('%s')", mu->url->url); + + int ret = fprintf(fp, "V\t%08x\t%08x\t%08x\t%02x\t%s\n", + mu->first_t, + mu->last_t, + mu->usages, + mu->flags, + mu->url->url + ); + + // error handling is done at registry_save() + + return ret; +} + +int registry_machine_save(void *entry, void *file) { + MACHINE *m = entry; + FILE *fp = file; + + debug(D_REGISTRY, "Registry: registry_machine_save('%s')", m->guid); + + int ret = fprintf(fp, "M\t%08x\t%08x\t%08x\t%s\n", + m->first_t, + m->last_t, + m->usages, + m->guid + ); + + if(ret >= 0) { + int ret2 = dictionary_get_all(m->urls, registry_machine_save_url, fp); + if(ret2 < 0) return ret2; + ret += ret2; + } + + // error handling is done at registry_save() + + return ret; +} + +static inline int registry_person_save_url(void *entry, void *file) { + PERSON_URL *pu = entry; + FILE *fp = file; + + debug(D_REGISTRY, "Registry: registry_person_save_url('%s')", pu->url->url); + + int ret = fprintf(fp, "U\t%08x\t%08x\t%08x\t%02x\t%s\t%s\t%s\n", + pu->first_t, + pu->last_t, + pu->usages, + pu->flags, + pu->machine->guid, + pu->name, + pu->url->url + ); + + // error handling is done at registry_save() + + return ret; +} + +static inline int registry_person_save(void *entry, void *file) { + PERSON *p = entry; + FILE *fp = file; + + debug(D_REGISTRY, "Registry: registry_person_save('%s')", p->guid); + + int ret = fprintf(fp, "P\t%08x\t%08x\t%08x\t%s\n", + p->first_t, + p->last_t, + p->usages, + p->guid + ); + + if(ret >= 0) { + int ret2 = dictionary_get_all(p->urls, registry_person_save_url, fp); + if (ret2 < 0) return ret2; + ret += ret2; + } + + // error handling is done at registry_save() + + return ret; +} + +int registry_save(void) { + if(!registry.enabled) return -1; + + // make sure the log is not updated + registry_log_lock(); + + if(unlikely(!registry_should_save_db())) { + registry_log_unlock(); + return -2; + } + + char tmp_filename[FILENAME_MAX + 1]; + char old_filename[FILENAME_MAX + 1]; + + snprintfz(old_filename, FILENAME_MAX, "%s.old", registry.db_filename); + snprintfz(tmp_filename, FILENAME_MAX, "%s.tmp", registry.db_filename); + + debug(D_REGISTRY, "Registry: Creating file '%s'", tmp_filename); + FILE *fp = fopen(tmp_filename, "w"); + if(!fp) { + error("Registry: Cannot create file: %s", tmp_filename); + registry_log_unlock(); + return -1; + } + + // dictionary_get_all() has its own locking, so this is safe to do + + debug(D_REGISTRY, "Saving all machines"); + int bytes1 = dictionary_get_all(registry.machines, registry_machine_save, fp); + if(bytes1 < 0) { + error("Registry: Cannot save registry machines - return value %d", bytes1); + fclose(fp); + registry_log_unlock(); + return bytes1; + } + debug(D_REGISTRY, "Registry: saving machines took %d bytes", bytes1); + + debug(D_REGISTRY, "Saving all persons"); + int bytes2 = dictionary_get_all(registry.persons, registry_person_save, fp); + if(bytes2 < 0) { + error("Registry: Cannot save registry persons - return value %d", bytes2); + fclose(fp); + registry_log_unlock(); + return bytes2; + } + debug(D_REGISTRY, "Registry: saving persons took %d bytes", bytes2); + + // save the totals + fprintf(fp, "T\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\n", + registry.persons_count, + registry.machines_count, + registry.usages_count + 1, // this is required - it is lost on db rotation + registry.urls_count, + registry.persons_urls_count, + registry.machines_urls_count + ); + + fclose(fp); + + errno = 0; + + // remove the .old db + debug(D_REGISTRY, "Registry: Removing old db '%s'", old_filename); + if(unlink(old_filename) == -1 && errno != ENOENT) + error("Registry: cannot remove old registry file '%s'", old_filename); + + // rename the db to .old + debug(D_REGISTRY, "Registry: Link current db '%s' to .old: '%s'", registry.db_filename, old_filename); + if(link(registry.db_filename, old_filename) == -1 && errno != ENOENT) + error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename, registry.db_filename); + + else { + // remove the database (it is saved in .old) + debug(D_REGISTRY, "Registry: removing db '%s'", registry.db_filename); + if (unlink(registry.db_filename) == -1 && errno != ENOENT) + error("Registry: cannot remove old registry file '%s'", registry.db_filename); + + // move the .tmp to make it active + debug(D_REGISTRY, "Registry: linking tmp db '%s' to active db '%s'", tmp_filename, registry.db_filename); + if (link(tmp_filename, registry.db_filename) == -1) { + error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename, + registry.db_filename); + + // move the .old back + debug(D_REGISTRY, "Registry: linking old db '%s' to active db '%s'", old_filename, registry.db_filename); + if(link(old_filename, registry.db_filename) == -1) + error("Registry: cannot move file '%s' to '%s'. Recovering the old registry DB failed!", old_filename, registry.db_filename); + } + else { + debug(D_REGISTRY, "Registry: removing tmp db '%s'", tmp_filename); + if(unlink(tmp_filename) == -1) + error("Registry: cannot remove tmp registry file '%s'", tmp_filename); + + // it has been moved successfully + // discard the current registry log + registry_log_recreate_nolock(); + + registry.log_count = 0; + } + } + + // continue operations + registry_log_unlock(); + + return -1; +} + +static inline size_t registry_load(void) { + char *s, buf[4096 + 1]; + PERSON *p = NULL; + MACHINE *m = NULL; + URL *u = NULL; + size_t line = 0; + + debug(D_REGISTRY, "Registry: loading active db from: '%s'", registry.db_filename); + FILE *fp = fopen(registry.db_filename, "r"); + if(!fp) { + error("Registry: cannot open registry file: '%s'", registry.db_filename); + return 0; + } + + size_t len = 0; + buf[4096] = '\0'; + while((s = fgets_trim_len(buf, 4096, fp, &len))) { + line++; + + debug(D_REGISTRY, "Registry: read line %zu to length %zu: %s", line, len, s); + switch(*s) { + case 'T': // totals + 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')) { + error("Registry totals line %u is wrong (len = %zu).", line, len); + continue; + } + registry.persons_count = strtoull(&s[2], NULL, 16); + registry.machines_count = strtoull(&s[19], NULL, 16); + registry.usages_count = strtoull(&s[36], NULL, 16); + registry.urls_count = strtoull(&s[53], NULL, 16); + registry.persons_urls_count = strtoull(&s[70], NULL, 16); + registry.machines_urls_count = strtoull(&s[87], NULL, 16); + break; + + case 'P': // person + m = NULL; + // verify it is valid + if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) { + error("Registry person line %u is wrong (len = %zu).", line, len); + continue; + } + + s[1] = s[10] = s[19] = s[28] = '\0'; + p = registry_person_allocate(&s[29], strtoul(&s[2], NULL, 16)); + p->last_t = strtoul(&s[11], NULL, 16); + p->usages = strtoul(&s[20], NULL, 16); + debug(D_REGISTRY, "Registry loaded person '%s', first: %u, last: %u, usages: %u", p->guid, p->first_t, p->last_t, p->usages); + break; + + case 'M': // machine + p = NULL; + // verify it is valid + if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) { + error("Registry person line %u is wrong (len = %zu).", line, len); + continue; + } + + s[1] = s[10] = s[19] = s[28] = '\0'; + m = registry_machine_allocate(&s[29], strtoul(&s[2], NULL, 16)); + m->last_t = strtoul(&s[11], NULL, 16); + m->usages = strtoul(&s[20], NULL, 16); + debug(D_REGISTRY, "Registry loaded machine '%s', first: %u, last: %u, usages: %u", m->guid, m->first_t, m->last_t, m->usages); + break; + + case 'U': // person URL + if(unlikely(!p)) { + error("Registry: ignoring line %zu, no person loaded: %s", line, s); + continue; + } + + // verify it is valid + if(len < 69 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t' || s[68] != '\t') { + error("Registry person URL line %u is wrong (len = %zu).", line, len); + continue; + } + + s[1] = s[10] = s[19] = s[28] = s[31] = s[68] = '\0'; + + // skip the name to find the url + char *url = &s[69]; + while(*url && *url != '\t') url++; + if(!*url) { + error("Registry person URL line %u does not have a url.", line); + continue; + } + *url++ = '\0'; + + u = registry_url_allocate_nolock(url, strlen(url)); + + time_t first_t = strtoul(&s[2], NULL, 16); + + m = registry_machine_find(&s[32]); + if(!m) m = registry_machine_allocate(&s[32], first_t); + + PERSON_URL *pu = registry_person_url_allocate(p, m, u, &s[69], strlen(&s[69]), first_t); + pu->last_t = strtoul(&s[11], NULL, 16); + pu->usages = strtoul(&s[20], NULL, 16); + pu->flags = strtoul(&s[29], NULL, 16); + 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); + break; + + case 'V': // machine URL + if(unlikely(!m)) { + error("Registry: ignoring line %zu, no machine loaded: %s", line, s); + continue; + } + + // verify it is valid + if(len < 32 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t') { + error("Registry person URL line %u is wrong (len = %zu).", line, len); + continue; + } + + s[1] = s[10] = s[19] = s[28] = s[31] = '\0'; + u = registry_url_allocate_nolock(&s[32], strlen(&s[32])); + + MACHINE_URL *mu = registry_machine_url_allocate(m, u, strtoul(&s[2], NULL, 16)); + mu->last_t = strtoul(&s[11], NULL, 16); + mu->usages = strtoul(&s[20], NULL, 16); + mu->flags = strtoul(&s[29], NULL, 16); + 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); + break; + + default: + error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.db_filename, s); + break; + } + } + fclose(fp); + + return line; +} + +// ---------------------------------------------------------------------------- +// REGISTRY + +int registry_init(void) { + char filename[FILENAME_MAX + 1]; + + // registry enabled? + registry.enabled = config_get_boolean("registry", "enabled", 0); + + // pathnames + registry.pathname = config_get("registry", "registry db directory", VARLIB_DIR "/registry"); + if(mkdir(registry.pathname, 0755) == -1 && errno != EEXIST) { + error("Cannot create directory '%s'. Registry disabled.", registry.pathname); + registry.enabled = 0; + return -1; + } + + // filenames + snprintfz(filename, FILENAME_MAX, "%s/netdata.public.unique.id", registry.pathname); + registry.machine_guid_filename = config_get("registry", "netdata unique id file", filename); + registry_get_this_machine_guid(); + + snprintfz(filename, FILENAME_MAX, "%s/registry.db", registry.pathname); + registry.db_filename = config_get("registry", "registry db file", filename); + + snprintfz(filename, FILENAME_MAX, "%s/registry-log.db", registry.pathname); + registry.log_filename = config_get("registry", "registry log file", filename); + + // configuration options + registry.save_registry_every_entries = config_get_number("registry", "registry save db every new entries", 1000000); + registry.persons_expiration = config_get_number("registry", "registry expire idle persons days", 365) * 86400; + registry.registry_domain = config_get("registry", "registry domain", ""); + registry.registry_to_announce = config_get("registry", "registry to announce", "https://registry.my-netdata.io"); + registry.hostname = config_get("registry", "registry hostname", config_get("global", "hostname", hostname)); + + registry.max_url_length = config_get_number("registry", "max URL length", 1024); + registry.max_name_length = config_get_number("registry", "max URL name length", 50); + + + // initialize entries counters + registry.persons_count = 0; + registry.machines_count = 0; + registry.usages_count = 0; + registry.urls_count = 0; + registry.persons_urls_count = 0; + registry.machines_urls_count = 0; + + // initialize memory counters + registry.persons_memory = 0; + registry.machines_memory = 0; + registry.urls_memory = 0; + registry.persons_urls_memory = 0; + registry.machines_urls_memory = 0; + + // initialize locks + pthread_mutex_init(®istry.persons_lock, NULL); + pthread_mutex_init(®istry.machines_lock, NULL); + pthread_mutex_init(®istry.urls_lock, NULL); + pthread_mutex_init(®istry.person_urls_lock, NULL); + pthread_mutex_init(®istry.machine_urls_lock, NULL); + + // create dictionaries + registry.persons = dictionary_create(DICTIONARY_FLAGS); + registry.machines = dictionary_create(DICTIONARY_FLAGS); + registry.urls = dictionary_create(DICTIONARY_FLAGS); + + // load the registry database + if(registry.enabled) { + registry_log_open_nolock(); + registry_load(); + registry_log_load(); + } + + return 0; +} + +void registry_free(void) { + if(!registry.enabled) return; + + // we need to destroy the dictionaries ourselves + // since the dictionaries use memory we allocated + + while(registry.persons->values_index.root) { + PERSON *p = ((NAME_VALUE *)registry.persons->values_index.root)->value; + + // fprintf(stderr, "\nPERSON: '%s', first: %u, last: %u, usages: %u\n", p->guid, p->first_t, p->last_t, p->usages); + + while(p->urls->values_index.root) { + PERSON_URL *pu = ((NAME_VALUE *)p->urls->values_index.root)->value; + + // 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); + + debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", pu->url->url, p->guid); + dictionary_del(p->urls, pu->url->url); + + debug(D_REGISTRY, "Registry: unlinking url '%s' from person", pu->url->url); + registry_url_unlink_nolock(pu->url); + + debug(D_REGISTRY, "Registry: freeing person url"); + free(pu); + } + + debug(D_REGISTRY, "Registry: deleting person '%s' from persons registry", p->guid); + dictionary_del(registry.persons, p->guid); + + debug(D_REGISTRY, "Registry: destroying URL dictionary of person '%s'", p->guid); + dictionary_destroy(p->urls); + + debug(D_REGISTRY, "Registry: freeing person '%s'", p->guid); + free(p); + } + + while(registry.machines->values_index.root) { + MACHINE *m = ((NAME_VALUE *)registry.machines->values_index.root)->value; + + // fprintf(stderr, "\nMACHINE: '%s', first: %u, last: %u, usages: %u\n", m->guid, m->first_t, m->last_t, m->usages); + + while(m->urls->values_index.root) { + MACHINE_URL *mu = ((NAME_VALUE *)m->urls->values_index.root)->value; + + // 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); + + //debug(D_REGISTRY, "Registry: destroying persons dictionary from url '%s'", mu->url->url); + //dictionary_destroy(mu->persons); + + debug(D_REGISTRY, "Registry: deleting url '%s' from person '%s'", mu->url->url, m->guid); + dictionary_del(m->urls, mu->url->url); + + debug(D_REGISTRY, "Registry: unlinking url '%s' from machine", mu->url->url); + registry_url_unlink_nolock(mu->url); + + debug(D_REGISTRY, "Registry: freeing machine url"); + free(mu); + } + + debug(D_REGISTRY, "Registry: deleting machine '%s' from machines registry", m->guid); + dictionary_del(registry.machines, m->guid); + + debug(D_REGISTRY, "Registry: destroying URL dictionary of machine '%s'", m->guid); + dictionary_destroy(m->urls); + + debug(D_REGISTRY, "Registry: freeing machine '%s'", m->guid); + free(m); + } + + // and free the memory of remaining dictionary structures + + debug(D_REGISTRY, "Registry: destroying persons dictionary"); + dictionary_destroy(registry.persons); + + debug(D_REGISTRY, "Registry: destroying machines dictionary"); + dictionary_destroy(registry.machines); + + debug(D_REGISTRY, "Registry: destroying urls dictionary"); + dictionary_destroy(registry.urls); +} + +// ---------------------------------------------------------------------------- +// STATISTICS + +void registry_statistics(void) { + if(!registry.enabled) return; + + static RRDSET *sts = NULL, *stc = NULL, *stm = NULL; + + if(!sts) sts = rrdset_find("netdata.registry_sessions"); + if(!sts) { + sts = rrdset_create("netdata", "registry_sessions", NULL, "registry", NULL, "NetData Registry Sessions", "session", 131000, rrd_update_every, RRDSET_TYPE_LINE); + + rrddim_add(sts, "sessions", NULL, 1, 1, RRDDIM_ABSOLUTE); + } + else rrdset_next(sts); + + rrddim_set(sts, "sessions", registry.usages_count); + rrdset_done(sts); + + // ------------------------------------------------------------------------ + + if(!stc) stc = rrdset_find("netdata.registry_entries"); + if(!stc) { + stc = rrdset_create("netdata", "registry_entries", NULL, "registry", NULL, "NetData Registry Entries", "entries", 131100, rrd_update_every, RRDSET_TYPE_LINE); + + rrddim_add(stc, "persons", NULL, 1, 1, RRDDIM_ABSOLUTE); + rrddim_add(stc, "machines", NULL, 1, 1, RRDDIM_ABSOLUTE); + rrddim_add(stc, "urls", NULL, 1, 1, RRDDIM_ABSOLUTE); + rrddim_add(stc, "persons_urls", NULL, 1, 1, RRDDIM_ABSOLUTE); + rrddim_add(stc, "machines_urls", NULL, 1, 1, RRDDIM_ABSOLUTE); + } + else rrdset_next(stc); + + rrddim_set(stc, "persons", registry.persons_count); + rrddim_set(stc, "machines", registry.machines_count); + rrddim_set(stc, "urls", registry.urls_count); + rrddim_set(stc, "persons_urls", registry.persons_urls_count); + rrddim_set(stc, "machines_urls", registry.machines_urls_count); + rrdset_done(stc); + + // ------------------------------------------------------------------------ + + if(!stm) stm = rrdset_find("netdata.registry_mem"); + if(!stm) { + stm = rrdset_create("netdata", "registry_mem", NULL, "registry", NULL, "NetData Registry Memory", "KB", 131300, rrd_update_every, RRDSET_TYPE_STACKED); + + rrddim_add(stm, "persons", NULL, 1, 1024, RRDDIM_ABSOLUTE); + rrddim_add(stm, "machines", NULL, 1, 1024, RRDDIM_ABSOLUTE); + rrddim_add(stm, "urls", NULL, 1, 1024, RRDDIM_ABSOLUTE); + rrddim_add(stm, "persons_urls", NULL, 1, 1024, RRDDIM_ABSOLUTE); + rrddim_add(stm, "machines_urls", NULL, 1, 1024, RRDDIM_ABSOLUTE); + } + else rrdset_next(stm); + + rrddim_set(stm, "persons", registry.persons_memory + registry.persons_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY)); + rrddim_set(stm, "machines", registry.machines_memory + registry.machines_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY)); + rrddim_set(stm, "urls", registry.urls_memory + registry.urls_count * sizeof(NAME_VALUE) + sizeof(DICTIONARY)); + rrddim_set(stm, "persons_urls", registry.persons_urls_memory + registry.persons_count * sizeof(DICTIONARY) + registry.persons_urls_count * sizeof(NAME_VALUE)); + rrddim_set(stm, "machines_urls", registry.machines_urls_memory + registry.machines_count * sizeof(DICTIONARY) + registry.machines_urls_count * sizeof(NAME_VALUE)); + rrdset_done(stm); +} |