#include "redis.h"
#include "lzf.h" /* LZF compression library */
#include "zipmap.h"
+#include "endianconv.h"
#include <math.h>
#include <sys/types.h>
return rdbWriteRaw(rdb,&type,1);
}
+/* Load a "type" in RDB format, that is a one byte unsigned integer.
+ * This function is not only used to load object types, but also special
+ * "types" like the end-of-file type, the EXPIRE type, and so forth. */
int rdbLoadType(rio *rdb) {
unsigned char type;
if (rioRead(rdb,&type,1) == 0) return -1;
return type;
}
-int rdbSaveTime(rio *rdb, time_t t) {
- int32_t t32 = (int32_t) t;
- return rdbWriteRaw(rdb,&t32,4);
-}
-
time_t rdbLoadTime(rio *rdb) {
int32_t t32;
if (rioRead(rdb,&t32,4) == 0) return -1;
return -1; /* avoid warning */
}
-/* Load object type. Return -1 when the byte doesn't contain an object type. */
+/* Use rdbLoadType() to load a TYPE in RDB format, but returns -1 if the
+ * type is not specifically a valid Object Type. */
int rdbLoadObjectType(rio *rdb) {
int type;
if ((type = rdbLoadType(rdb)) == -1) return -1;
dictIterator *di = NULL;
dictEntry *de;
char tmpfile[256];
+ char magic[10];
int j;
long long now = mstime();
FILE *fp;
rio rdb;
+ uint64_t cksum;
snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
fp = fopen(tmpfile,"w");
}
rioInitWithFile(&rdb,fp);
- if (rdbWriteRaw(&rdb,"REDIS0003",9) == -1) goto werr;
+ if (server.rdb_checksum)
+ rdb.update_cksum = rioGenericUpdateChecksum;
+ snprintf(magic,sizeof(magic),"REDIS%04d",REDIS_RDB_VERSION);
+ if (rdbWriteRaw(&rdb,magic,9) == -1) goto werr;
for (j = 0; j < server.dbnum; j++) {
redisDb *db = server.db+j;
}
dictReleaseIterator(di);
}
+ di = NULL; /* So that we don't release it again on error. */
+
/* EOF opcode */
if (rdbSaveType(&rdb,REDIS_RDB_OPCODE_EOF) == -1) goto werr;
+ /* CRC64 checksum. It will be zero if checksum computation is disabled, the
+ * loading code skips the check in this case. */
+ cksum = rdb.cksum;
+ memrev64ifbe(&cksum);
+ rioWrite(&rdb,&cksum,8);
+
/* Make sure data will not remain on the OS's output buffers */
fflush(fp);
fsync(fileno(fp));
redisLog(REDIS_NOTICE,"DB saved on disk");
server.dirty = 0;
server.lastsave = time(NULL);
+ server.lastbgsave_status = REDIS_OK;
return REDIS_OK;
werr:
if (server.ipfd > 0) close(server.ipfd);
if (server.sofd > 0) close(server.sofd);
retval = rdbSave(filename);
- _exit((retval == REDIS_OK) ? 0 : 1);
+ exitFromChild((retval == REDIS_OK) ? 0 : 1);
} else {
/* Parent */
server.stat_fork_time = ustime()-start;
return REDIS_ERR;
}
redisLog(REDIS_NOTICE,"Background saving started by pid %d",childpid);
+ server.rdb_save_time_start = time(NULL);
server.rdb_child_pid = childpid;
updateDictResizePolicy();
return REDIS_OK;
size_t len;
unsigned int i;
- redisLog(REDIS_DEBUG,"LOADING OBJECT %d (at %d)\n",rdbtype,rdb->tell(rdb));
+ redisLog(REDIS_DEBUG,"LOADING OBJECT %d (at %d)\n",rdbtype,rioTell(rdb));
if (rdbtype == REDIS_RDB_TYPE_STRING) {
/* Read string value */
if ((o = rdbLoadEncodedStringObject(rdb)) == NULL) return NULL;
}
/* This will also be called when the set was just converted
- * to regular hashtable encoded set */
+ * to regular hash table encoded set */
if (o->encoding == REDIS_ENCODING_HT) {
dictAdd((dict*)o->ptr,ele,NULL);
} else {
hashTypeConvert(o, REDIS_ENCODING_HT);
/* Load every field and value into the ziplist */
- while (o->encoding == REDIS_ENCODING_ZIPLIST && len-- > 0) {
+ while (o->encoding == REDIS_ENCODING_ZIPLIST && len > 0) {
robj *field, *value;
+ len--;
/* Load raw strings */
field = rdbLoadStringObject(rdb);
if (field == NULL) return NULL;
if (value == NULL) return NULL;
redisAssert(field->encoding == REDIS_ENCODING_RAW);
+ /* Add pair to ziplist */
+ o->ptr = ziplistPush(o->ptr, field->ptr, sdslen(field->ptr), ZIPLIST_TAIL);
+ o->ptr = ziplistPush(o->ptr, value->ptr, sdslen(value->ptr), ZIPLIST_TAIL);
/* Convert to hash table if size threshold is exceeded */
if (sdslen(field->ptr) > server.hash_max_ziplist_value ||
sdslen(value->ptr) > server.hash_max_ziplist_value)
{
+ decrRefCount(field);
+ decrRefCount(value);
hashTypeConvert(o, REDIS_ENCODING_HT);
break;
}
-
- /* Add pair to ziplist */
- o->ptr = ziplistPush(o->ptr, field->ptr, sdslen(field->ptr), ZIPLIST_TAIL);
- o->ptr = ziplistPush(o->ptr, value->ptr, sdslen(value->ptr), ZIPLIST_TAIL);
+ decrRefCount(field);
+ decrRefCount(value);
}
/* Load remaining fields and values into the hash table */
- while (o->encoding == REDIS_ENCODING_HT && len-- > 0) {
+ while (o->encoding == REDIS_ENCODING_HT && len > 0) {
robj *field, *value;
+ len--;
/* Load encoded strings */
field = rdbLoadEncodedStringObject(rdb);
if (field == NULL) return NULL;
return REDIS_ERR;
}
rioInitWithFile(&rdb,fp);
+ if (server.rdb_checksum)
+ rdb.update_cksum = rioGenericUpdateChecksum;
if (rioRead(&rdb,buf,9) == 0) goto eoferr;
buf[9] = '\0';
if (memcmp(buf,"REDIS",5) != 0) {
return REDIS_ERR;
}
rdbver = atoi(buf+5);
- if (rdbver < 1 || rdbver > 3) {
+ if (rdbver < 1 || rdbver > REDIS_RDB_VERSION) {
fclose(fp);
redisLog(REDIS_WARNING,"Can't handle RDB format version %d",rdbver);
errno = EINVAL;
/* Serve the clients from time to time */
if (!(loops++ % 1000)) {
- loadingProgress(rdb.tell(&rdb));
+ loadingProgress(rioTell(&rdb));
aeProcessEvents(server.el, AE_FILE_EVENTS|AE_DONT_WAIT);
}
if ((key = rdbLoadStringObject(&rdb)) == NULL) goto eoferr;
/* Read value */
if ((val = rdbLoadObject(type,&rdb)) == NULL) goto eoferr;
- /* Check if the key already expired */
- if (expiretime != -1 && expiretime < now) {
+ /* Check if the key already expired. This function is used when loading
+ * an RDB file from disk, either at startup, or when an RDB was
+ * received from the master. In the latter case, the master is
+ * responsible for key expiry. If we would expire keys here, the
+ * snapshot taken by the master may not be reflected on the slave. */
+ if (server.masterhost == NULL && expiretime != -1 && expiretime < now) {
decrRefCount(key);
decrRefCount(val);
continue;
decrRefCount(key);
}
+ /* Verify the checksum if RDB version is >= 5 */
+ if (rdbver >= 5 && server.rdb_checksum) {
+ uint64_t cksum, expected = rdb.cksum;
+
+ if (rioRead(&rdb,&cksum,8) == 0) goto eoferr;
+ memrev64ifbe(&cksum);
+ if (cksum == 0) {
+ redisLog(REDIS_WARNING,"RDB file was saved with checksum disabled: no check performed.");
+ } else if (cksum != expected) {
+ redisLog(REDIS_WARNING,"Wrong RDB checksum. Aborting now.");
+ exit(1);
+ }
+ }
+
fclose(fp);
stopLoading();
return REDIS_OK;
"Background saving terminated with success");
server.dirty = server.dirty - server.dirty_before_bgsave;
server.lastsave = time(NULL);
+ server.lastbgsave_status = REDIS_OK;
} else if (!bysignal && exitcode != 0) {
redisLog(REDIS_WARNING, "Background saving error");
+ server.lastbgsave_status = REDIS_ERR;
} else {
redisLog(REDIS_WARNING,
"Background saving terminated by signal %d", bysignal);
rdbRemoveTempFile(server.rdb_child_pid);
+ server.lastbgsave_status = REDIS_ERR;
}
server.rdb_child_pid = -1;
+ server.rdb_save_time_last = time(NULL)-server.rdb_save_time_start;
+ server.rdb_save_time_start = -1;
/* Possibly there are slaves waiting for a BGSAVE in order to be served
* (the first stage of SYNC is a bulk transfer of dump.rdb) */
updateSlavesWaitingBgsave(exitcode == 0 ? REDIS_OK : REDIS_ERR);
projects / redis.git / blobdiff