src/registry/registry_person.c
// SPDX-License-Identifier: GPL-3.0-or-later
#include "daemon/common.h"
#include "registry_internals.h"
// ----------------------------------------------------------------------------
// PERSON_URL INDEX
inline REGISTRY_PERSON_URL *registry_person_url_index_find(REGISTRY_PERSON *p, STRING *url) {
netdata_log_debug(D_REGISTRY, "Registry: registry_person_url_index_find('%s', '%s')", p->guid, string2str(url));
REGISTRY_PERSON_URL *pu;
for(pu = p->person_urls ; pu ;pu = pu->next)
if(pu->url == url)
break;
return pu;
}
inline REGISTRY_PERSON_URL *registry_person_url_index_add(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
DOUBLE_LINKED_LIST_PREPEND_ITEM_UNSAFE(p->person_urls, pu, prev, next);
return pu;
}
inline REGISTRY_PERSON_URL *registry_person_url_index_del(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
DOUBLE_LINKED_LIST_REMOVE_ITEM_UNSAFE(p->person_urls, pu, prev, next);
return pu;
}
// ----------------------------------------------------------------------------
// PERSON_URL
REGISTRY_PERSON_URL *registry_person_url_allocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, STRING *url, char *machine_name, size_t machine_name_len, time_t when) {
netdata_log_debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, string2str(url), sizeof(REGISTRY_PERSON_URL) + machine_name_len);
// protection from too big names
if(machine_name_len > registry.max_name_length)
machine_name_len = registry.max_name_length;
REGISTRY_PERSON_URL *pu = aral_mallocz(registry.person_urls_aral);
// a simple strcpy() should do the job,
// but I prefer to be safe, since the caller specified name_len
pu->machine_name = string_strdupz(machine_name);
pu->machine = m;
pu->first_t = pu->last_t = (uint32_t)when;
pu->usages = 1;
pu->url = string_dup(url);
pu->flags = REGISTRY_URL_FLAGS_DEFAULT;
m->links++;
netdata_log_debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, string2str(url));
REGISTRY_PERSON_URL *tpu = registry_person_url_index_add(p, pu);
if(tpu != pu) {
netdata_log_error("Registry: Attempted to add duplicate person url '%s' with name '%s' to person '%s'", string2str(url), machine_name, p->guid);
string_freez(pu->machine_name);
string_freez(pu->url);
aral_freez(registry.person_urls_aral, pu);
pu = tpu;
}
return pu;
}
void registry_person_url_deindex_and_free(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
netdata_log_debug(D_REGISTRY, "registry_person_url_deindex_and_free('%s', '%s')", p->guid, string2str(pu->url));
REGISTRY_PERSON_URL *tpu = registry_person_url_index_del(p, pu);
if(tpu) {
string_freez(tpu->machine_name);
string_freez(tpu->url);
tpu->machine->links--;
aral_freez(registry.person_urls_aral, tpu);
}
}
// this function is needed to change the name of a PERSON_URL
REGISTRY_PERSON_URL *registry_person_url_reallocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, STRING *url, char *machine_name, size_t machine_name_len, time_t when, REGISTRY_PERSON_URL *pu) {
netdata_log_debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, string2str(url), sizeof(REGISTRY_PERSON_URL) + machine_name_len);
// keep a backup
REGISTRY_PERSON_URL pu2 = {
.first_t = pu->first_t,
.last_t = pu->last_t,
.usages = pu->usages,
.flags = pu->flags,
.machine = pu->machine,
.machine_name = NULL
};
// remove the existing one from the index
registry_person_url_deindex_and_free(p, pu);
pu = &pu2;
// allocate a new one
REGISTRY_PERSON_URL *tpu = registry_person_url_allocate(p, m, url, machine_name, machine_name_len, when);
tpu->first_t = pu->first_t;
tpu->last_t = pu->last_t;
tpu->usages = pu->usages;
tpu->flags = pu->flags;
return tpu;
}
// ----------------------------------------------------------------------------
// PERSON
REGISTRY_PERSON *registry_person_find(const char *person_guid) {
netdata_log_debug(D_REGISTRY, "Registry: registry_person_find('%s')", person_guid);
return dictionary_get(registry.persons, person_guid);
}
REGISTRY_PERSON *registry_person_allocate(const char *person_guid, time_t when) {
netdata_log_debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(REGISTRY_PERSON));
REGISTRY_PERSON *p = aral_mallocz(registry.persons_aral);
if(!person_guid) {
for(;;) {
nd_uuid_t uuid;
uuid_generate(uuid);
uuid_unparse_lower(uuid, p->guid);
netdata_log_debug(D_REGISTRY, "Registry: Checking if the generated person guid '%s' is unique", p->guid);
if (!dictionary_get(registry.persons, p->guid)) {
netdata_log_debug(D_REGISTRY, "Registry: generated person guid '%s' is unique", p->guid);
break;
}
else
netdata_log_info("Registry: generated person guid '%s' found in the registry. Retrying...", p->guid);
}
}
else
strncpyz(p->guid, person_guid, GUID_LEN);
p->person_urls = NULL;
p->first_t = p->last_t = (uint32_t)when;
p->usages = 0;
registry.persons_count++;
dictionary_set(registry.persons, p->guid, p, sizeof(REGISTRY_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
REGISTRY_PERSON *registry_person_find_or_create(const char *person_guid, time_t when, bool is_dummy) {
netdata_log_debug(D_REGISTRY, "Registry: registry_person_find_or_create('%s'): creating dictionary of urls", person_guid);
char buf[GUID_LEN + 1];
REGISTRY_PERSON *p = NULL;
if(person_guid && *person_guid) {
// validate it is a GUID
if(unlikely(regenerate_guid(person_guid, buf) == -1)) {
netdata_log_info("Registry: person guid '%s' is not a valid guid. Ignoring it.", person_guid);
person_guid = NULL;
}
else {
person_guid = buf;
p = registry_person_find(person_guid);
if(!p && !is_dummy)
person_guid = NULL;
}
}
else
person_guid = NULL;
if(!p) p = registry_person_allocate(person_guid, when);
return p;
}
// ----------------------------------------------------------------------------
// LINKING OF OBJECTS
REGISTRY_PERSON_URL *registry_person_link_to_url(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, STRING *url, char *machine_name, size_t machine_name_len, time_t when) {
netdata_log_debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): searching for URL in person", p->guid, m->guid, string2str(url));
REGISTRY_PERSON_URL *pu = registry_person_url_index_find(p, url);
if(!pu) {
netdata_log_debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): not found", p->guid, m->guid, string2str(url));
pu = registry_person_url_allocate(p, m, url, machine_name, machine_name_len, when);
registry.persons_urls_count++;
}
else {
netdata_log_debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): found", p->guid, m->guid, string2str(url));
pu->usages++;
if(likely(pu->last_t < (uint32_t)when)) pu->last_t = (uint32_t)when;
if(pu->machine != m) {
REGISTRY_MACHINE_URL *mu = registry_machine_url_find(pu->machine, url);
if(mu) {
netdata_log_debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): URL switched machines (old was '%s') - expiring it from previous machine.",
p->guid, m->guid, string2str(url), pu->machine->guid);
mu->flags |= REGISTRY_URL_FLAGS_EXPIRED;
}
else {
netdata_log_debug(D_REGISTRY, "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, string2str(url), pu->machine->guid);
}
pu->machine->links--;
pu->machine = m;
}
if(strcmp(string2str(pu->machine_name), machine_name) != 0) {
// the name of the PERSON_URL has changed !
pu = registry_person_url_reallocate(p, m, url, machine_name, machine_name_len, when, pu);
}
}
p->usages++;
if(likely(p->last_t < (uint32_t)when)) p->last_t = (uint32_t)when;
if(pu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
netdata_log_debug(D_REGISTRY, "registry_person_link_to_url('%s', '%s', '%s'): accessing an expired URL. Re-enabling URL.", p->guid, m->guid, string2str(url));
pu->flags &= ~REGISTRY_URL_FLAGS_EXPIRED;
}
return pu;
}
void registry_person_unlink_from_url(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
registry_person_url_deindex_and_free(p, pu);
}