Marginally more robust glibc version test for sync_file_range detection.

[redis.git] / src / rdb.c

diff --git a/src/rdb.c b/src/rdb.c
index d6d1fcc6c14e17b86e025660697d5dccd7c03d95..5018473eb938942642631296a015d9ee1b671583 100644 (file)
--- a/src/rdb.c
+++ b/src/rdb.c
@@ -1,6 +1,7 @@
 #include "redis.h"
 #include "lzf.h"    /* LZF compression library */
 #include "zipmap.h"
 #include "redis.h"
 #include "lzf.h"    /* LZF compression library */
 #include "zipmap.h"

+#include "endianconv.h"

 
 #include <math.h>
 #include <sys/types.h>
 
 #include <math.h>
 #include <sys/types.h>


@@ -20,6 +21,9 @@ int rdbSaveType(rio *rdb, unsigned char type) {
     return rdbWriteRaw(rdb,&type,1);
 }
 
     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;
 int rdbLoadType(rio *rdb) {
     unsigned char type;
     if (rioRead(rdb,&type,1) == 0) return -1;


@@ -432,7 +436,8 @@ int rdbSaveObjectType(rio *rdb, robj *o) {
     return -1; /* avoid warning */
 }
 
     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;
 int rdbLoadObjectType(rio *rdb) {
     int type;
     if ((type = rdbLoadType(rdb)) == -1) return -1;


@@ -602,6 +607,7 @@ int rdbSave(char *filename) {
     long long now = mstime();
     FILE *fp;
     rio rdb;
     long long now = mstime();
     FILE *fp;
     rio rdb;

+    uint64_t cksum;

 
     snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
     fp = fopen(tmpfile,"w");
 
     snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
     fp = fopen(tmpfile,"w");


@@ -612,6 +618,8 @@ int rdbSave(char *filename) {
     }
 
     rioInitWithFile(&rdb,fp);
     }
 
     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;
 
     snprintf(magic,sizeof(magic),"REDIS%04d",REDIS_RDB_VERSION);
     if (rdbWriteRaw(&rdb,magic,9) == -1) goto werr;
 


@@ -641,9 +649,17 @@ int rdbSave(char *filename) {
         }
         dictReleaseIterator(di);
     }
         }
         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;
 
     /* 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));
     /* Make sure data will not remain on the OS's output buffers */
     fflush(fp);
     fsync(fileno(fp));


@@ -696,6 +712,7 @@ int rdbSaveBackground(char *filename) {
             return REDIS_ERR;
         }
         redisLog(REDIS_NOTICE,"Background saving started by pid %d",childpid);
             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;
         server.rdb_child_pid = childpid;
         updateDictResizePolicy();
         return REDIS_OK;


@@ -717,7 +734,7 @@ robj *rdbLoadObject(int rdbtype, rio *rdb) {
     size_t len;
     unsigned int i;
 
     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;
     if (rdbtype == REDIS_RDB_TYPE_STRING) {
         /* Read string value */
         if ((o = rdbLoadEncodedStringObject(rdb)) == NULL) return NULL;


@@ -993,6 +1010,8 @@ void startLoading(FILE *fp) {
 /* Refresh the loading progress info */
 void loadingProgress(off_t pos) {
     server.loading_loaded_bytes = pos;
 /* 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 */
 }
 
 /* Loading finished */


@@ -1016,6 +1035,8 @@ int rdbLoad(char *filename) {
         return REDIS_ERR;
     }
     rioInitWithFile(&rdb,fp);
         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) {
     if (rioRead(&rdb,buf,9) == 0) goto eoferr;
     buf[9] = '\0';
     if (memcmp(buf,"REDIS",5) != 0) {


@@ -1025,7 +1046,7 @@ int rdbLoad(char *filename) {
         return REDIS_ERR;
     }
     rdbver = atoi(buf+5);
         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;
         fclose(fp);
         redisLog(REDIS_WARNING,"Can't handle RDB format version %d",rdbver);
         errno = EINVAL;


@@ -1039,7 +1060,7 @@ int rdbLoad(char *filename) {
 
         /* Serve the clients from time to time */
         if (!(loops++ % 1000)) {
 
         /* 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);
         }
 
             aeProcessEvents(server.el, AE_FILE_EVENTS|AE_DONT_WAIT);
         }
 


@@ -1096,6 +1117,20 @@ int rdbLoad(char *filename) {
 
         decrRefCount(key);
     }
 
         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;
     fclose(fp);
     stopLoading();
     return REDIS_OK;


@@ -1124,6 +1159,8 @@ void backgroundSaveDoneHandler(int exitcode, int bysignal) {
         server.lastbgsave_status = REDIS_ERR;
     }
     server.rdb_child_pid = -1;
         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);
     /* 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);