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// SPDX-License-Identifier: GPL-3.0-or-later
#include "daemon/common.h"
#include "registry_internals.h"
// ----------------------------------------------------------------------------
// PERSON_URL INDEX
int person_url_compare(void *a, void *b) {
register uint32_t hash1 = ((REGISTRY_PERSON_URL *)a)->url->hash;
register uint32_t hash2 = ((REGISTRY_PERSON_URL *)b)->url->hash;
if(hash1 < hash2) return -1;
else if(hash1 > hash2) return 1;
else return strcmp(((REGISTRY_PERSON_URL *)a)->url->url, ((REGISTRY_PERSON_URL *)b)->url->url);
}
inline REGISTRY_PERSON_URL *registry_person_url_index_find(REGISTRY_PERSON *p, const char *url) {
debug(D_REGISTRY, "Registry: registry_person_url_index_find('%s', '%s')", p->guid, url);
char buf[sizeof(REGISTRY_URL) + strlen(url)];
REGISTRY_URL *u = (REGISTRY_URL *)&buf;
strcpy(u->url, url);
u->hash = simple_hash(u->url);
REGISTRY_PERSON_URL tpu = { .url = u };
REGISTRY_PERSON_URL *pu = (REGISTRY_PERSON_URL *)avl_search(&p->person_urls, (void *)&tpu);
return pu;
}
inline REGISTRY_PERSON_URL *registry_person_url_index_add(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
debug(D_REGISTRY, "Registry: registry_person_url_index_add('%s', '%s')", p->guid, pu->url->url);
REGISTRY_PERSON_URL *tpu = (REGISTRY_PERSON_URL *)avl_insert(&(p->person_urls), (avl_t *)(pu));
if(tpu != pu)
error("Registry: registry_person_url_index_add('%s', '%s') already exists as '%s'", p->guid, pu->url->url, tpu->url->url);
return tpu;
}
inline REGISTRY_PERSON_URL *registry_person_url_index_del(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
debug(D_REGISTRY, "Registry: registry_person_url_index_del('%s', '%s')", p->guid, pu->url->url);
REGISTRY_PERSON_URL *tpu = (REGISTRY_PERSON_URL *)avl_remove(&(p->person_urls), (avl_t *)(pu));
if(!tpu)
error("Registry: registry_person_url_index_del('%s', '%s') deleted nothing", p->guid, pu->url->url);
else if(tpu != pu)
error("Registry: registry_person_url_index_del('%s', '%s') deleted wrong URL '%s'", p->guid, pu->url->url, tpu->url->url);
return tpu;
}
// ----------------------------------------------------------------------------
// PERSON_URL
REGISTRY_PERSON_URL *registry_person_url_allocate(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_URL *u, char *name, size_t namelen, time_t when) {
debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, sizeof(REGISTRY_PERSON_URL) + namelen);
// protection from too big names
if(namelen > registry.max_name_length)
namelen = registry.max_name_length;
REGISTRY_PERSON_URL *pu = mallocz(sizeof(REGISTRY_PERSON_URL) + namelen);
// a simple strcpy() should do the job
// but I prefer to be safe, since the caller specified urllen
strncpyz(pu->machine_name, name, namelen);
pu->machine = m;
pu->first_t = pu->last_t = (uint32_t)when;
pu->usages = 1;
pu->url = u;
pu->flags = REGISTRY_URL_FLAGS_DEFAULT;
m->links++;
registry.persons_urls_memory += sizeof(REGISTRY_PERSON_URL) + namelen;
debug(D_REGISTRY, "registry_person_url_allocate('%s', '%s', '%s'): indexing URL in person", p->guid, m->guid, u->url);
REGISTRY_PERSON_URL *tpu = registry_person_url_index_add(p, pu);
if(tpu != pu) {
error("Registry: Attempted to add duplicate person url '%s' with name '%s' to person '%s'", u->url, name, p->guid);
freez(pu);
pu = tpu;
}
else
registry_url_link(u);
return pu;
}
void registry_person_url_free(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
debug(D_REGISTRY, "registry_person_url_free('%s', '%s')", p->guid, pu->url->url);
REGISTRY_PERSON_URL *tpu = registry_person_url_index_del(p, pu);
if(tpu) {
registry_url_unlink(tpu->url);
tpu->machine->links--;
registry.persons_urls_memory -= sizeof(REGISTRY_PERSON_URL) + strlen(tpu->machine_name);
freez(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, REGISTRY_URL *u, char *name, size_t namelen, time_t when, REGISTRY_PERSON_URL *pu) {
debug(D_REGISTRY, "registry_person_url_reallocate('%s', '%s', '%s'): allocating %zu bytes", p->guid, m->guid, u->url, sizeof(REGISTRY_PERSON_URL) + namelen);
// 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 = ""
};
// remove the existing one from the index
registry_person_url_free(p, pu);
pu = &pu2;
// allocate a new one
REGISTRY_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;
tpu->flags = pu->flags;
return tpu;
}
// ----------------------------------------------------------------------------
// PERSON
REGISTRY_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);
}
REGISTRY_PERSON *registry_person_allocate(const char *person_guid, time_t when) {
debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): allocating new person, sizeof(PERSON)=%zu", (person_guid)?person_guid:"", sizeof(REGISTRY_PERSON));
REGISTRY_PERSON *p = mallocz(sizeof(REGISTRY_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, GUID_LEN);
debug(D_REGISTRY, "Registry: registry_person_allocate('%s'): creating dictionary of urls", p->guid);
avl_init(&p->person_urls, person_url_compare);
p->first_t = p->last_t = (uint32_t)when;
p->usages = 0;
registry.persons_memory += sizeof(REGISTRY_PERSON);
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_get(const char *person_guid, time_t when) {
debug(D_REGISTRY, "Registry: registry_person_get('%s'): creating dictionary of urls", person_guid);
REGISTRY_PERSON *p = NULL;
if(person_guid && *person_guid) {
char buf[GUID_LEN + 1];
// validate it is a GUID
if(unlikely(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) p = registry_person_allocate(NULL, when);
return p;
}
void registry_person_del(REGISTRY_PERSON *p) {
debug(D_REGISTRY, "Registry: registry_person_del('%s'): creating dictionary of urls", p->guid);
while(p->person_urls.root)
registry_person_unlink_from_url(p, (REGISTRY_PERSON_URL *)p->person_urls.root);
debug(D_REGISTRY, "Registry: deleting person '%s' from persons registry", p->guid);
dictionary_del(registry.persons, p->guid);
debug(D_REGISTRY, "Registry: freeing person '%s'", p->guid);
freez(p);
}
// ----------------------------------------------------------------------------
// LINKING OF OBJECTS
REGISTRY_PERSON_URL *registry_person_link_to_url(REGISTRY_PERSON *p, REGISTRY_MACHINE *m, REGISTRY_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_URL *pu = registry_person_url_index_find(p, 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 < (uint32_t)when)) pu->last_t = (uint32_t)when;
if(pu->machine != m) {
REGISTRY_MACHINE_URL *mu = dictionary_get(pu->machine->machine_urls, u->url);
if(mu) {
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, u->url, pu->machine->guid);
mu->flags |= REGISTRY_URL_FLAGS_EXPIRED;
}
else {
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, u->url, pu->machine->guid);
}
pu->machine->links--;
pu->machine = m;
}
if(strcmp(pu->machine_name, name) != 0) {
// 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 < (uint32_t)when)) p->last_t = (uint32_t)when;
if(pu->flags & REGISTRY_URL_FLAGS_EXPIRED) {
debug(D_REGISTRY, "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;
}
return pu;
}
void registry_person_unlink_from_url(REGISTRY_PERSON *p, REGISTRY_PERSON_URL *pu) {
registry_person_url_free(p, pu);
}
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