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// 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:
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