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-rw-r--r--registry/registry_person.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/registry/registry_person.c b/registry/registry_person.c
new file mode 100644
index 00000000..4fd40fd7
--- /dev/null
+++ b/registry/registry_person.c
@@ -0,0 +1,232 @@
+// 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(;;) {
+ 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);
+}