Exit with Fatal error at startup if the RDB file signature or version is wrong.

[redis.git] / src / db.c

diff --git a/src/db.c b/src/db.c
index 47994df20eb7bcfb6fce90f890cbc163bfb401b3..9620b6e8f640f10cbecf6172642aadc2d9be2de2 100644 (file)
--- a/src/db.c
+++ b/src/db.c
@@ -79,7 +79,7 @@ void dbAdd(redisDb *db, robj *key, robj *val) {
     sds copy = sdsdup(key->ptr);
     int retval = dictAdd(db->dict, copy, val);
 
-    redisAssert(retval == REDIS_OK);
+    redisAssertWithInfo(NULL,key,retval == REDIS_OK);
     if (server.cluster_enabled) SlotToKeyAdd(key);
  }
 
@@ -91,7 +91,7 @@ void dbAdd(redisDb *db, robj *key, robj *val) {
 void dbOverwrite(redisDb *db, robj *key, robj *val) {
     struct dictEntry *de = dictFind(db->dict,key->ptr);
     
-    redisAssert(de != NULL);
+    redisAssertWithInfo(NULL,key,de != NULL);
     dictReplace(db->dict, key->ptr, val);
 }
 
@@ -328,6 +328,7 @@ void shutdownCommand(redisClient *c) {
 
 void renameGenericCommand(redisClient *c, int nx) {
     robj *o;
+    time_t expire;
 
     /* To use the same key as src and dst is probably an error */
     if (sdscmp(c->argv[1]->ptr,c->argv[2]->ptr) == 0) {
@@ -339,16 +340,18 @@ void renameGenericCommand(redisClient *c, int nx) {
         return;
 
     incrRefCount(o);
+    expire = getExpire(c->db,c->argv[1]);
     if (lookupKeyWrite(c->db,c->argv[2]) != NULL) {
         if (nx) {
             decrRefCount(o);
             addReply(c,shared.czero);
             return;
         }
-        dbOverwrite(c->db,c->argv[2],o);
-    } else {
-        dbAdd(c->db,c->argv[2],o);
+        /* Overwrite: delete the old key before creating the new one with the same name. */
+        dbDelete(c->db,c->argv[2]);
     }
+    dbAdd(c->db,c->argv[2],o);
+    if (expire != -1) setExpire(c->db,c->argv[2],expire);
     dbDelete(c->db,c->argv[1]);
     signalModifiedKey(c->db,c->argv[1]);
     signalModifiedKey(c->db,c->argv[2]);
@@ -419,7 +422,7 @@ void moveCommand(redisClient *c) {
 int removeExpire(redisDb *db, robj *key) {
     /* An expire may only be removed if there is a corresponding entry in the
      * main dict. Otherwise, the key will never be freed. */
-    redisAssert(dictFind(db->dict,key->ptr) != NULL);
+    redisAssertWithInfo(NULL,key,dictFind(db->dict,key->ptr) != NULL);
     return dictDelete(db->expires,key->ptr) == DICT_OK;
 }
 
@@ -428,7 +431,7 @@ void setExpire(redisDb *db, robj *key, time_t when) {
 
     /* Reuse the sds from the main dict in the expire dict */
     de = dictFind(db->dict,key->ptr);
-    redisAssert(de != NULL);
+    redisAssertWithInfo(NULL,key,de != NULL);
     dictReplace(db->expires,dictGetEntryKey(de),(void*)when);
 }
 
@@ -443,7 +446,7 @@ time_t getExpire(redisDb *db, robj *key) {
 
     /* The entry was found in the expire dict, this means it should also
      * be present in the main dict (safety check). */
-    redisAssert(dictFind(db->dict,key->ptr) != NULL);
+    redisAssertWithInfo(NULL,key,dictFind(db->dict,key->ptr) != NULL);
     return (time_t) dictGetEntryVal(de);
 }
 
@@ -516,10 +519,24 @@ void expireGenericCommand(redisClient *c, robj *key, robj *param, long offset) {
         addReply(c,shared.czero);
         return;
     }
-    if (seconds <= 0 && !server.loading) {
-        if (dbDelete(c->db,key)) server.dirty++;
-        addReply(c, shared.cone);
+    /* EXPIRE with negative TTL, or EXPIREAT with a timestamp into the past
+     * should never be executed as a DEL when load the AOF or in the context
+     * of a slave instance.
+     *
+     * Instead we take the other branch of the IF statement setting an expire
+     * (possibly in the past) and wait for an explicit DEL from the master. */
+    if (seconds <= 0 && !server.loading && !server.masterhost) {
+        robj *aux;
+
+        redisAssertWithInfo(c,key,dbDelete(c->db,key));
+        server.dirty++;
+
+        /* Replicate/AOF this as an explicit DEL. */
+        aux = createStringObject("DEL",3);
+        rewriteClientCommandVector(c,2,aux,key);
+        decrRefCount(aux);
         signalModifiedKey(c->db,key);
+        addReply(c, shared.cone);
         return;
     } else {
         time_t when = time(NULL)+seconds;