diff options
Diffstat (limited to 'registry/registry_person.c')
| -rw-r--r-- | registry/registry_person.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/registry/registry_person.c b/registry/registry_person.c new file mode 100644 index 00000000..53e3f47f --- /dev/null +++ b/registry/registry_person.c @@ -0,0 +1,267 @@ +// 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 *)(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 *)(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); + free(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); +} |