summaryrefslogtreecommitdiffstats
path: root/src/registry_db.c
diff options
context:
space:
mode:
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_db.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_db.c')
-rw-r--r--src/registry_db.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/src/registry_db.c b/src/registry_db.c
new file mode 100644
index 000000000..de6c634c3
--- /dev/null
+++ b/src/registry_db.c
@@ -0,0 +1,343 @@
+#include "registry_internals.h"
+
+int registry_db_should_be_saved(void) {
+ debug(D_REGISTRY, "log entries %llu, max %llu", registry.log_count, registry.save_registry_every_entries);
+ return registry.log_count > registry.save_registry_every_entries;
+}
+
+// ----------------------------------------------------------------------------
+// INTERNAL FUNCTIONS FOR SAVING REGISTRY OBJECTS
+
+static int registry_machine_save_url(void *entry, void *file) {
+ REGISTRY_MACHINE_URL *mu = entry;
+ FILE *fp = file;
+
+ debug(D_REGISTRY, "Registry: registry_machine_save_url('%s')", mu->url->url);
+
+ int ret = fprintf(fp, "V\t%08x\t%08x\t%08x\t%02x\t%s\n",
+ mu->first_t,
+ mu->last_t,
+ mu->usages,
+ mu->flags,
+ mu->url->url
+ );
+
+ // error handling is done at registry_db_save()
+
+ return ret;
+}
+
+static int registry_machine_save(void *entry, void *file) {
+ REGISTRY_MACHINE *m = entry;
+ FILE *fp = file;
+
+ debug(D_REGISTRY, "Registry: registry_machine_save('%s')", m->guid);
+
+ int ret = fprintf(fp, "M\t%08x\t%08x\t%08x\t%s\n",
+ m->first_t,
+ m->last_t,
+ m->usages,
+ m->guid
+ );
+
+ if(ret >= 0) {
+ int ret2 = dictionary_get_all(m->machine_urls, registry_machine_save_url, fp);
+ if(ret2 < 0) return ret2;
+ ret += ret2;
+ }
+
+ // error handling is done at registry_db_save()
+
+ return ret;
+}
+
+static inline int registry_person_save_url(void *entry, void *file) {
+ REGISTRY_PERSON_URL *pu = entry;
+ FILE *fp = file;
+
+ debug(D_REGISTRY, "Registry: registry_person_save_url('%s')", pu->url->url);
+
+ int ret = fprintf(fp, "U\t%08x\t%08x\t%08x\t%02x\t%s\t%s\t%s\n",
+ pu->first_t,
+ pu->last_t,
+ pu->usages,
+ pu->flags,
+ pu->machine->guid,
+ pu->machine_name,
+ pu->url->url
+ );
+
+ // error handling is done at registry_db_save()
+
+ return ret;
+}
+
+static inline int registry_person_save(void *entry, void *file) {
+ REGISTRY_PERSON *p = entry;
+ FILE *fp = file;
+
+ debug(D_REGISTRY, "Registry: registry_person_save('%s')", p->guid);
+
+ int ret = fprintf(fp, "P\t%08x\t%08x\t%08x\t%s\n",
+ p->first_t,
+ p->last_t,
+ p->usages,
+ p->guid
+ );
+
+ if(ret >= 0) {
+ //int ret2 = dictionary_get_all(p->person_urls, registry_person_save_url, fp);
+ int ret2 = avl_traverse(&p->person_urls, registry_person_save_url, fp);
+ if (ret2 < 0) return ret2;
+ ret += ret2;
+ }
+
+ // error handling is done at registry_db_save()
+
+ return ret;
+}
+
+// ----------------------------------------------------------------------------
+// SAVE THE REGISTRY DATABASE
+
+int registry_db_save(void) {
+ if(unlikely(!registry.enabled))
+ return -1;
+
+ if(unlikely(!registry_db_should_be_saved()))
+ return -2;
+
+ error_log_limit_unlimited();
+
+ char tmp_filename[FILENAME_MAX + 1];
+ char old_filename[FILENAME_MAX + 1];
+
+ snprintfz(old_filename, FILENAME_MAX, "%s.old", registry.db_filename);
+ snprintfz(tmp_filename, FILENAME_MAX, "%s.tmp", registry.db_filename);
+
+ debug(D_REGISTRY, "Registry: Creating file '%s'", tmp_filename);
+ FILE *fp = fopen(tmp_filename, "w");
+ if(!fp) {
+ error("Registry: Cannot create file: %s", tmp_filename);
+ error_log_limit_reset();
+ return -1;
+ }
+
+ // dictionary_get_all() has its own locking, so this is safe to do
+
+ debug(D_REGISTRY, "Saving all machines");
+ int bytes1 = dictionary_get_all(registry.machines, registry_machine_save, fp);
+ if(bytes1 < 0) {
+ error("Registry: Cannot save registry machines - return value %d", bytes1);
+ fclose(fp);
+ error_log_limit_reset();
+ return bytes1;
+ }
+ debug(D_REGISTRY, "Registry: saving machines took %d bytes", bytes1);
+
+ debug(D_REGISTRY, "Saving all persons");
+ int bytes2 = dictionary_get_all(registry.persons, registry_person_save, fp);
+ if(bytes2 < 0) {
+ error("Registry: Cannot save registry persons - return value %d", bytes2);
+ fclose(fp);
+ error_log_limit_reset();
+ return bytes2;
+ }
+ debug(D_REGISTRY, "Registry: saving persons took %d bytes", bytes2);
+
+ // save the totals
+ fprintf(fp, "T\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\t%016llx\n",
+ registry.persons_count,
+ registry.machines_count,
+ registry.usages_count + 1, // this is required - it is lost on db rotation
+ registry.urls_count,
+ registry.persons_urls_count,
+ registry.machines_urls_count
+ );
+
+ fclose(fp);
+
+ errno = 0;
+
+ // remove the .old db
+ debug(D_REGISTRY, "Registry: Removing old db '%s'", old_filename);
+ if(unlink(old_filename) == -1 && errno != ENOENT)
+ error("Registry: cannot remove old registry file '%s'", old_filename);
+
+ // rename the db to .old
+ debug(D_REGISTRY, "Registry: Link current db '%s' to .old: '%s'", registry.db_filename, old_filename);
+ if(link(registry.db_filename, old_filename) == -1 && errno != ENOENT)
+ error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", registry.db_filename, old_filename);
+
+ else {
+ // remove the database (it is saved in .old)
+ debug(D_REGISTRY, "Registry: removing db '%s'", registry.db_filename);
+ if (unlink(registry.db_filename) == -1 && errno != ENOENT)
+ error("Registry: cannot remove old registry file '%s'", registry.db_filename);
+
+ // move the .tmp to make it active
+ debug(D_REGISTRY, "Registry: linking tmp db '%s' to active db '%s'", tmp_filename, registry.db_filename);
+ if (link(tmp_filename, registry.db_filename) == -1) {
+ error("Registry: cannot move file '%s' to '%s'. Saving registry DB failed!", tmp_filename,
+ registry.db_filename);
+
+ // move the .old back
+ debug(D_REGISTRY, "Registry: linking old db '%s' to active db '%s'", old_filename, registry.db_filename);
+ if(link(old_filename, registry.db_filename) == -1)
+ error("Registry: cannot move file '%s' to '%s'. Recovering the old registry DB failed!", old_filename, registry.db_filename);
+ }
+ else {
+ debug(D_REGISTRY, "Registry: removing tmp db '%s'", tmp_filename);
+ if(unlink(tmp_filename) == -1)
+ error("Registry: cannot remove tmp registry file '%s'", tmp_filename);
+
+ // it has been moved successfully
+ // discard the current registry log
+ registry_log_recreate();
+ registry.log_count = 0;
+ }
+ }
+
+ // continue operations
+ error_log_limit_reset();
+
+ return -1;
+}
+
+// ----------------------------------------------------------------------------
+// LOAD THE REGISTRY DATABASE
+
+size_t registry_db_load(void) {
+ char *s, buf[4096 + 1];
+ REGISTRY_PERSON *p = NULL;
+ REGISTRY_MACHINE *m = NULL;
+ REGISTRY_URL *u = NULL;
+ size_t line = 0;
+
+ debug(D_REGISTRY, "Registry: loading active db from: '%s'", registry.db_filename);
+ FILE *fp = fopen(registry.db_filename, "r");
+ if(!fp) {
+ error("Registry: cannot open registry file: '%s'", registry.db_filename);
+ return 0;
+ }
+
+ size_t len = 0;
+ buf[4096] = '\0';
+ while((s = fgets_trim_len(buf, 4096, fp, &len))) {
+ line++;
+
+ debug(D_REGISTRY, "Registry: read line %zu to length %zu: %s", line, len, s);
+ switch(*s) {
+ case 'T': // totals
+ if(unlikely(len != 103 || s[1] != '\t' || s[18] != '\t' || s[35] != '\t' || s[52] != '\t' || s[69] != '\t' || s[86] != '\t' || s[103] != '\0')) {
+ error("Registry totals line %zu is wrong (len = %zu).", line, len);
+ continue;
+ }
+ registry.persons_count = strtoull(&s[2], NULL, 16);
+ registry.machines_count = strtoull(&s[19], NULL, 16);
+ registry.usages_count = strtoull(&s[36], NULL, 16);
+ registry.urls_count = strtoull(&s[53], NULL, 16);
+ registry.persons_urls_count = strtoull(&s[70], NULL, 16);
+ registry.machines_urls_count = strtoull(&s[87], NULL, 16);
+ break;
+
+ case 'P': // person
+ m = NULL;
+ // verify it is valid
+ if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
+ error("Registry person line %zu is wrong (len = %zu).", line, len);
+ continue;
+ }
+
+ s[1] = s[10] = s[19] = s[28] = '\0';
+ p = registry_person_allocate(&s[29], strtoul(&s[2], NULL, 16));
+ p->last_t = (uint32_t)strtoul(&s[11], NULL, 16);
+ p->usages = (uint32_t)strtoul(&s[20], NULL, 16);
+ debug(D_REGISTRY, "Registry loaded person '%s', first: %u, last: %u, usages: %u", p->guid, p->first_t, p->last_t, p->usages);
+ break;
+
+ case 'M': // machine
+ p = NULL;
+ // verify it is valid
+ if(unlikely(len != 65 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[65] != '\0')) {
+ error("Registry person line %zu is wrong (len = %zu).", line, len);
+ continue;
+ }
+
+ s[1] = s[10] = s[19] = s[28] = '\0';
+ m = registry_machine_allocate(&s[29], strtoul(&s[2], NULL, 16));
+ m->last_t = (uint32_t)strtoul(&s[11], NULL, 16);
+ m->usages = (uint32_t)strtoul(&s[20], NULL, 16);
+ debug(D_REGISTRY, "Registry loaded machine '%s', first: %u, last: %u, usages: %u", m->guid, m->first_t, m->last_t, m->usages);
+ break;
+
+ case 'U': // person URL
+ if(unlikely(!p)) {
+ error("Registry: ignoring line %zu, no person loaded: %s", line, s);
+ continue;
+ }
+
+ // verify it is valid
+ if(len < 69 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t' || s[68] != '\t') {
+ error("Registry person URL line %zu is wrong (len = %zu).", line, len);
+ continue;
+ }
+
+ s[1] = s[10] = s[19] = s[28] = s[31] = s[68] = '\0';
+
+ // skip the name to find the url
+ char *url = &s[69];
+ while(*url && *url != '\t') url++;
+ if(!*url) {
+ error("Registry person URL line %zu does not have a url.", line);
+ continue;
+ }
+ *url++ = '\0';
+
+ // u = registry_url_allocate_nolock(url, strlen(url));
+ u = registry_url_get(url, strlen(url));
+
+ time_t first_t = strtoul(&s[2], NULL, 16);
+
+ m = registry_machine_find(&s[32]);
+ if(!m) m = registry_machine_allocate(&s[32], first_t);
+
+ REGISTRY_PERSON_URL *pu = registry_person_url_allocate(p, m, u, &s[69], strlen(&s[69]), first_t);
+ pu->last_t = (uint32_t)strtoul(&s[11], NULL, 16);
+ pu->usages = (uint32_t)strtoul(&s[20], NULL, 16);
+ pu->flags = (uint8_t)strtoul(&s[29], NULL, 16);
+ debug(D_REGISTRY, "Registry loaded person URL '%s' with name '%s' of machine '%s', first: %u, last: %u, usages: %u, flags: %02x", u->url, pu->machine_name, m->guid, pu->first_t, pu->last_t, pu->usages, pu->flags);
+ break;
+
+ case 'V': // machine URL
+ if(unlikely(!m)) {
+ error("Registry: ignoring line %zu, no machine loaded: %s", line, s);
+ continue;
+ }
+
+ // verify it is valid
+ if(len < 32 || s[1] != '\t' || s[10] != '\t' || s[19] != '\t' || s[28] != '\t' || s[31] != '\t') {
+ error("Registry person URL line %zu is wrong (len = %zu).", line, len);
+ continue;
+ }
+
+ s[1] = s[10] = s[19] = s[28] = s[31] = '\0';
+ // u = registry_url_allocate_nolock(&s[32], strlen(&s[32]));
+ u = registry_url_get(&s[32], strlen(&s[32]));
+
+ REGISTRY_MACHINE_URL *mu = registry_machine_url_allocate(m, u, strtoul(&s[2], NULL, 16));
+ mu->last_t = (uint32_t)strtoul(&s[11], NULL, 16);
+ mu->usages = (uint32_t)strtoul(&s[20], NULL, 16);
+ mu->flags = (uint8_t)strtoul(&s[29], NULL, 16);
+ debug(D_REGISTRY, "Registry loaded machine URL '%s', machine '%s', first: %u, last: %u, usages: %u, flags: %02x", u->url, m->guid, mu->first_t, mu->last_t, mu->usages, mu->flags);
+ break;
+
+ default:
+ error("Registry: ignoring line %zu of filename '%s': %s.", line, registry.db_filename, s);
+ break;
+ }
+ }
+ fclose(fp);
+
+ return line;
+}