diff options
Diffstat (limited to 'registry/registry_db.c')
| -rw-r--r-- | registry/registry_db.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/registry/registry_db.c b/registry/registry_db.c new file mode 100644 index 000000000..d8e2bbd8d --- /dev/null +++ b/registry/registry_db.c @@ -0,0 +1,346 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "../daemon/common.h" +#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; +} |