+/*
+ * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Redis nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
#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 -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;
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 (server.rdb_checksum)
+ rdb.update_cksum = rioGenericUpdateChecksum;
snprintf(magic,sizeof(magic),"REDIS%04d",REDIS_RDB_VERSION);
if (rdbWriteRaw(&rdb,magic,9) == -1) goto werr;
}
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));
if (server.ipfd > 0) close(server.ipfd);
if (server.sofd > 0) close(server.sofd);
retval = rdbSave(filename);
- _exit((retval == REDIS_OK) ? 0 : 1);
+ if (retval == REDIS_OK) {
+ size_t private_dirty = zmalloc_get_private_dirty();
+
+ if (private_dirty) {
+ redisLog(REDIS_NOTICE,
+ "RDB: %lu MB of memory used by copy-on-write",
+ private_dirty/(1024*1024));
+ }
+ }
+ 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 {
/* Refresh the loading progress info */
void loadingProgress(off_t pos) {
server.loading_loaded_bytes = pos;
+ if (server.stat_peak_memory < zmalloc_used_memory())
+ server.stat_peak_memory = zmalloc_used_memory();
}
/* Loading finished */
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 > 4) {
+ 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);
}
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;
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