#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;
else
redisPanic("Unknown sorted set encoding");
case REDIS_HASH:
- if (o->encoding == REDIS_ENCODING_ZIPMAP)
- return rdbSaveType(rdb,REDIS_RDB_TYPE_HASH_ZIPMAP);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST)
+ return rdbSaveType(rdb,REDIS_RDB_TYPE_HASH_ZIPLIST);
else if (o->encoding == REDIS_ENCODING_HT)
return rdbSaveType(rdb,REDIS_RDB_TYPE_HASH);
else
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;
}
} else if (o->type == REDIS_HASH) {
/* Save a hash value */
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- size_t l = zipmapBlobLen((unsigned char*)o->ptr);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ size_t l = ziplistBlobLen((unsigned char*)o->ptr);
if ((n = rdbSaveRawString(rdb,o->ptr,l)) == -1) return -1;
nwritten += n;
- } else {
+
+ } else if (o->encoding == REDIS_ENCODING_HT) {
dictIterator *di = dictGetIterator(o->ptr);
dictEntry *de;
nwritten += n;
}
dictReleaseIterator(di);
+
+ } else {
+ redisPanic("Unknown hash encoding");
}
+
} else {
redisPanic("Unknown object type");
}
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;
maxelelen <= server.zset_max_ziplist_value)
zsetConvert(o,REDIS_ENCODING_ZIPLIST);
} else if (rdbtype == REDIS_RDB_TYPE_HASH) {
- size_t hashlen;
+ size_t len;
+ int ret;
+
+ len = rdbLoadLen(rdb, NULL);
+ if (len == REDIS_RDB_LENERR) return NULL;
- if ((hashlen = rdbLoadLen(rdb,NULL)) == REDIS_RDB_LENERR) return NULL;
o = createHashObject();
+
/* Too many entries? Use an hash table. */
- if (hashlen > server.hash_max_zipmap_entries)
- convertToRealHash(o);
- /* Load every key/value, then set it into the zipmap or hash
- * table, as needed. */
- while(hashlen--) {
- robj *key, *val;
-
- if ((key = rdbLoadEncodedStringObject(rdb)) == NULL) return NULL;
- if ((val = rdbLoadEncodedStringObject(rdb)) == NULL) return NULL;
- /* If we are using a zipmap and there are too big values
- * the object is converted to real hash table encoding. */
- if (o->encoding != REDIS_ENCODING_HT &&
- ((key->encoding == REDIS_ENCODING_RAW &&
- sdslen(key->ptr) > server.hash_max_zipmap_value) ||
- (val->encoding == REDIS_ENCODING_RAW &&
- sdslen(val->ptr) > server.hash_max_zipmap_value)))
+ if (len > server.hash_max_ziplist_entries)
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+
+ /* Load every field and value into the ziplist */
+ while (o->encoding == REDIS_ENCODING_ZIPLIST && len > 0) {
+ robj *field, *value;
+
+ len--;
+ /* Load raw strings */
+ field = rdbLoadStringObject(rdb);
+ if (field == NULL) return NULL;
+ redisAssert(field->encoding == REDIS_ENCODING_RAW);
+ value = rdbLoadStringObject(rdb);
+ 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)
{
- convertToRealHash(o);
+ decrRefCount(field);
+ decrRefCount(value);
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+ break;
}
+ decrRefCount(field);
+ decrRefCount(value);
+ }
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *zm = o->ptr;
- robj *deckey, *decval;
-
- /* We need raw string objects to add them to the zipmap */
- deckey = getDecodedObject(key);
- decval = getDecodedObject(val);
- zm = zipmapSet(zm,deckey->ptr,sdslen(deckey->ptr),
- decval->ptr,sdslen(decval->ptr),NULL);
- o->ptr = zm;
- decrRefCount(deckey);
- decrRefCount(decval);
- decrRefCount(key);
- decrRefCount(val);
- } else {
- key = tryObjectEncoding(key);
- val = tryObjectEncoding(val);
- dictAdd((dict*)o->ptr,key,val);
- }
+ /* Load remaining fields and values into the hash table */
+ while (o->encoding == REDIS_ENCODING_HT && len > 0) {
+ robj *field, *value;
+
+ len--;
+ /* Load encoded strings */
+ field = rdbLoadEncodedStringObject(rdb);
+ if (field == NULL) return NULL;
+ value = rdbLoadEncodedStringObject(rdb);
+ if (value == NULL) return NULL;
+
+ field = tryObjectEncoding(field);
+ value = tryObjectEncoding(value);
+
+ /* Add pair to hash table */
+ ret = dictAdd((dict*)o->ptr, field, value);
+ redisAssert(ret == REDIS_OK);
}
+
+ /* All pairs should be read by now */
+ redisAssert(len == 0);
+
} else if (rdbtype == REDIS_RDB_TYPE_HASH_ZIPMAP ||
rdbtype == REDIS_RDB_TYPE_LIST_ZIPLIST ||
rdbtype == REDIS_RDB_TYPE_SET_INTSET ||
- rdbtype == REDIS_RDB_TYPE_ZSET_ZIPLIST)
+ rdbtype == REDIS_RDB_TYPE_ZSET_ZIPLIST ||
+ rdbtype == REDIS_RDB_TYPE_HASH_ZIPLIST)
{
robj *aux = rdbLoadStringObject(rdb);
* converted. */
switch(rdbtype) {
case REDIS_RDB_TYPE_HASH_ZIPMAP:
- o->type = REDIS_HASH;
- o->encoding = REDIS_ENCODING_ZIPMAP;
- if (zipmapLen(o->ptr) > server.hash_max_zipmap_entries)
- convertToRealHash(o);
+ /* Convert to ziplist encoded hash. This must be deprecated
+ * when loading dumps created by Redis 2.4 gets deprecated. */
+ {
+ unsigned char *zl = ziplistNew();
+ unsigned char *zi = zipmapRewind(o->ptr);
+ unsigned char *fstr, *vstr;
+ unsigned int flen, vlen;
+ unsigned int maxlen = 0;
+
+ while ((zi = zipmapNext(zi, &fstr, &flen, &vstr, &vlen)) != NULL) {
+ if (flen > maxlen) maxlen = flen;
+ if (vlen > maxlen) maxlen = vlen;
+ zl = ziplistPush(zl, fstr, flen, ZIPLIST_TAIL);
+ zl = ziplistPush(zl, vstr, vlen, ZIPLIST_TAIL);
+ }
+
+ zfree(o->ptr);
+ o->ptr = zl;
+ o->type = REDIS_HASH;
+ o->encoding = REDIS_ENCODING_ZIPLIST;
+
+ if (hashTypeLength(o) > server.hash_max_ziplist_entries ||
+ maxlen > server.hash_max_ziplist_value)
+ {
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+ }
+ }
break;
case REDIS_RDB_TYPE_LIST_ZIPLIST:
o->type = REDIS_LIST;
if (zsetLength(o) > server.zset_max_ziplist_entries)
zsetConvert(o,REDIS_ENCODING_SKIPLIST);
break;
+ case REDIS_RDB_TYPE_HASH_ZIPLIST:
+ o->type = REDIS_HASH;
+ o->encoding = REDIS_ENCODING_ZIPLIST;
+ if (hashTypeLength(o) > server.hash_max_ziplist_entries)
+ hashTypeConvert(o, REDIS_ENCODING_HT);
+ break;
default:
redisPanic("Unknown encoding");
break;
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