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authorLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
committerLennart Weller <lhw@ring0.de>2017-01-24 15:21:09 +0000
commit3ed3b02ed96ddab1c084811f3579b3a2aec83e04 (patch)
tree7a61ab288ae47800c4f11be5677d6ad8288dcd98 /src/registry_person.c
parentNew upstream version 1.4.0+dfsg (diff)
downloadnetdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.tar.xz
netdata-3ed3b02ed96ddab1c084811f3579b3a2aec83e04.zip
New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg
Diffstat (limited to 'src/registry_person.c')
-rw-r--r--src/registry_person.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/src/registry_person.c b/src/registry_person.c
new file mode 100644
index 000000000..5f9099c9a
--- /dev/null
+++ b/src/registry_person.c
@@ -0,0 +1,264 @@
+#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(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) 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)) {
+ // 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);
+}