Comments about security of slave-read-only in redis.coinf.

[redis.git] / src / object.c

diff --git a/src/object.c b/src/object.c
index c7c90c546d6c5acc99df9a51fa379c81f9b69847..ccb07208511c45e593d07f6bc0e80cc78ce6d4e0 100644 (file)
--- a/src/object.c
+++ b/src/object.c
@@ -1,6 +1,6 @@
 #include "redis.h"
 #include "redis.h"

-#include <pthread.h>

 #include <math.h>
 #include <math.h>

+#include <ctype.h>

 
 robj *createObject(int type, void *ptr) {
     robj *o = zmalloc(sizeof(*o));
 
 robj *createObject(int type, void *ptr) {
     robj *o = zmalloc(sizeof(*o));


@@ -30,9 +30,7 @@ robj *createStringObject(char *ptr, size_t len) {
 
 robj *createStringObjectFromLongLong(long long value) {
     robj *o;
 
 robj *createStringObjectFromLongLong(long long value) {
     robj *o;

-    if (value >= 0 && value < REDIS_SHARED_INTEGERS &&
-        !server.ds_enabled &&
-        pthread_equal(pthread_self(),server.mainthread)) {
+    if (value >= 0 && value < REDIS_SHARED_INTEGERS) {

         incrRefCount(shared.integers[value]);
         o = shared.integers[value];
     } else {
         incrRefCount(shared.integers[value]);
         o = shared.integers[value];
     } else {


@@ -47,8 +45,23 @@ robj *createStringObjectFromLongLong(long long value) {
     return o;
 }
 
     return o;
 }
 

+/* Note: this function is defined into object.c since here it is where it
+ * belongs but it is actually designed to be used just for INCRBYFLOAT */
+robj *createStringObjectFromLongDouble(long double value) {
+    char buf[256];
+    int len;
+
+    /* We use 17 digits precision since with 128 bit floats that precision
+     * after rouding is able to represent most small decimal numbers in a way
+     * that is "non surprising" for the user (that is, most small decimal
+     * numbers will be represented in a way that when converted back into
+     * a string are exactly the same as what the user typed.) */
+    len = snprintf(buf,sizeof(buf),"%.17Lg", value);
+    return createStringObject(buf,len);
+}
+

 robj *dupStringObject(robj *o) {
 robj *dupStringObject(robj *o) {

-    redisAssert(o->encoding == REDIS_ENCODING_RAW);
+    redisAssertWithInfo(NULL,o,o->encoding == REDIS_ENCODING_RAW);

     return createStringObject(o->ptr,sdslen(o->ptr));
 }
 
     return createStringObject(o->ptr,sdslen(o->ptr));
 }
 


@@ -82,12 +95,9 @@ robj *createIntsetObject(void) {
 }
 
 robj *createHashObject(void) {
 }
 
 robj *createHashObject(void) {

-    /* All the Hashes start as zipmaps. Will be automatically converted
-     * into hash tables if there are enough elements or big elements
-     * inside. */
-    unsigned char *zm = zipmapNew();
-    robj *o = createObject(REDIS_HASH,zm);
-    o->encoding = REDIS_ENCODING_ZIPMAP;
+    unsigned char *zl = ziplistNew();
+    robj *o = createObject(REDIS_HASH, zl);
+    o->encoding = REDIS_ENCODING_ZIPLIST;

     return o;
 }
 
     return o;
 }
 


@@ -163,7 +173,7 @@ void freeHashObject(robj *o) {
     case REDIS_ENCODING_HT:
         dictRelease((dict*) o->ptr);
         break;
     case REDIS_ENCODING_HT:
         dictRelease((dict*) o->ptr);
         break;

-    case REDIS_ENCODING_ZIPMAP:
+    case REDIS_ENCODING_ZIPLIST:

         zfree(o->ptr);
         break;
     default:
         zfree(o->ptr);
         break;
     default:


@@ -180,7 +190,7 @@ void decrRefCount(void *obj) {
     robj *o = obj;
 
     if (o->refcount <= 0) redisPanic("decrRefCount against refcount <= 0");
     robj *o = obj;
 
     if (o->refcount <= 0) redisPanic("decrRefCount against refcount <= 0");

-    if (--(o->refcount) == 0) {
+    if (o->refcount == 1) {

         switch(o->type) {
         case REDIS_STRING: freeStringObject(o); break;
         case REDIS_LIST: freeListObject(o); break;
         switch(o->type) {
         case REDIS_STRING: freeStringObject(o); break;
         case REDIS_LIST: freeListObject(o); break;


@@ -189,11 +199,29 @@ void decrRefCount(void *obj) {
         case REDIS_HASH: freeHashObject(o); break;
         default: redisPanic("Unknown object type"); break;
         }
         case REDIS_HASH: freeHashObject(o); break;
         default: redisPanic("Unknown object type"); break;
         }

-        o->ptr = NULL; /* defensive programming. We'll see NULL in traces. */

         zfree(o);
         zfree(o);

+    } else {
+        o->refcount--;

     }
 }
 
     }
 }
 

+/* This function set the ref count to zero without freeing the object.
+ * It is useful in order to pass a new object to functions incrementing
+ * the ref count of the received object. Example:
+ *
+ *    functionThatWillIncrementRefCount(resetRefCount(CreateObject(...)));
+ *
+ * Otherwise you need to resort to the less elegant pattern:
+ *
+ *    *obj = createObject(...);
+ *    functionThatWillIncrementRefCount(obj);
+ *    decrRefCount(obj);
+ */
+robj *resetRefCount(robj *obj) {
+    obj->refcount = 0;
+    return obj;
+}
+

 int checkType(redisClient *c, robj *o, int type) {
     if (o->type != type) {
         addReply(c,shared.wrongtypeerr);
 int checkType(redisClient *c, robj *o, int type) {
     if (o->type != type) {
         addReply(c,shared.wrongtypeerr);


@@ -202,6 +230,16 @@ int checkType(redisClient *c, robj *o, int type) {
     return 0;
 }
 
     return 0;
 }
 

+int isObjectRepresentableAsLongLong(robj *o, long long *llval) {
+    redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);
+    if (o->encoding == REDIS_ENCODING_INT) {
+        if (llval) *llval = (long) o->ptr;
+        return REDIS_OK;
+    } else {
+        return string2ll(o->ptr,sdslen(o->ptr),llval) ? REDIS_OK : REDIS_ERR;
+    }
+}
+

 /* Try to encode a string object in order to save space */
 robj *tryObjectEncoding(robj *o) {
     long value;
 /* Try to encode a string object in order to save space */
 robj *tryObjectEncoding(robj *o) {
     long value;


@@ -216,10 +254,10 @@ robj *tryObjectEncoding(robj *o) {
      if (o->refcount > 1) return o;
 
     /* Currently we try to encode only strings */
      if (o->refcount > 1) return o;
 
     /* Currently we try to encode only strings */

-    redisAssert(o->type == REDIS_STRING);
+    redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);

 
     /* Check if we can represent this string as a long integer */
 
     /* Check if we can represent this string as a long integer */

-    if (isStringRepresentableAsLong(s,&value) == REDIS_ERR) return o;
+    if (!string2l(s,sdslen(s),&value)) return o;

 
     /* Ok, this object can be encoded...
      *
 
     /* Ok, this object can be encoded...
      *


@@ -230,10 +268,7 @@ robj *tryObjectEncoding(robj *o) {
      * Note that we also avoid using shared integers when maxmemory is used
      * because every object needs to have a private LRU field for the LRU
      * algorithm to work well. */
      * Note that we also avoid using shared integers when maxmemory is used
      * because every object needs to have a private LRU field for the LRU
      * algorithm to work well. */

-    if (!server.ds_enabled &&
-        server.maxmemory == 0 && value >= 0 && value < REDIS_SHARED_INTEGERS &&
-        pthread_equal(pthread_self(),server.mainthread))
-    {
+    if (server.maxmemory == 0 && value >= 0 && value < REDIS_SHARED_INTEGERS) {

         decrRefCount(o);
         incrRefCount(shared.integers[value]);
         return shared.integers[value];
         decrRefCount(o);
         incrRefCount(shared.integers[value]);
         return shared.integers[value];


@@ -274,7 +309,7 @@ robj *getDecodedObject(robj *o) {
  * sdscmp() from sds.c will apply memcmp() so this function ca be considered
  * binary safe. */
 int compareStringObjects(robj *a, robj *b) {
  * sdscmp() from sds.c will apply memcmp() so this function ca be considered
  * binary safe. */
 int compareStringObjects(robj *a, robj *b) {

-    redisAssert(a->type == REDIS_STRING && b->type == REDIS_STRING);
+    redisAssertWithInfo(NULL,a,a->type == REDIS_STRING && b->type == REDIS_STRING);

     char bufa[128], bufb[128], *astr, *bstr;
     int bothsds = 1;
 
     char bufa[128], bufb[128], *astr, *bstr;
     int bothsds = 1;
 


@@ -309,7 +344,7 @@ int equalStringObjects(robj *a, robj *b) {
 }
 
 size_t stringObjectLen(robj *o) {
 }
 
 size_t stringObjectLen(robj *o) {

-    redisAssert(o->type == REDIS_STRING);
+    redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);

     if (o->encoding == REDIS_ENCODING_RAW) {
         return sdslen(o->ptr);
     } else {
     if (o->encoding == REDIS_ENCODING_RAW) {
         return sdslen(o->ptr);
     } else {


@@ -326,17 +361,19 @@ int getDoubleFromObject(robj *o, double *target) {
     if (o == NULL) {
         value = 0;
     } else {
     if (o == NULL) {
         value = 0;
     } else {

-        redisAssert(o->type == REDIS_STRING);
+        redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);

         if (o->encoding == REDIS_ENCODING_RAW) {
         if (o->encoding == REDIS_ENCODING_RAW) {

+            errno = 0;

             value = strtod(o->ptr, &eptr);
             value = strtod(o->ptr, &eptr);

-            if (eptr[0] != '\0' || isnan(value)) return REDIS_ERR;
+            if (isspace(((char*)o->ptr)[0]) || eptr[0] != '\0' ||
+                errno == ERANGE || isnan(value))
+                return REDIS_ERR;

         } else if (o->encoding == REDIS_ENCODING_INT) {
             value = (long)o->ptr;
         } else {
             redisPanic("Unknown string encoding");
         }
     }
         } else if (o->encoding == REDIS_ENCODING_INT) {
             value = (long)o->ptr;
         } else {
             redisPanic("Unknown string encoding");
         }
     }

-

     *target = value;
     return REDIS_OK;
 }
     *target = value;
     return REDIS_OK;
 }


@@ -347,11 +384,48 @@ int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const ch
         if (msg != NULL) {
             addReplyError(c,(char*)msg);
         } else {
         if (msg != NULL) {
             addReplyError(c,(char*)msg);
         } else {

-            addReplyError(c,"value is not a double");
+            addReplyError(c,"value is not a valid float");

         }
         return REDIS_ERR;
     }
         }
         return REDIS_ERR;
     }

+    *target = value;
+    return REDIS_OK;
+}

 
 

+int getLongDoubleFromObject(robj *o, long double *target) {
+    long double value;
+    char *eptr;
+
+    if (o == NULL) {
+        value = 0;
+    } else {
+        redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);
+        if (o->encoding == REDIS_ENCODING_RAW) {
+            errno = 0;
+            value = strtold(o->ptr, &eptr);
+            if (isspace(((char*)o->ptr)[0]) || eptr[0] != '\0' ||
+                errno == ERANGE || isnan(value))
+                return REDIS_ERR;
+        } else if (o->encoding == REDIS_ENCODING_INT) {
+            value = (long)o->ptr;
+        } else {
+            redisPanic("Unknown string encoding");
+        }
+    }
+    *target = value;
+    return REDIS_OK;
+}
+
+int getLongDoubleFromObjectOrReply(redisClient *c, robj *o, long double *target, const char *msg) {
+    long double value;
+    if (getLongDoubleFromObject(o, &value) != REDIS_OK) {
+        if (msg != NULL) {
+            addReplyError(c,(char*)msg);
+        } else {
+            addReplyError(c,"value is not a valid float");
+        }
+        return REDIS_ERR;
+    }

     *target = value;
     return REDIS_OK;
 }
     *target = value;
     return REDIS_OK;
 }


@@ -363,11 +437,12 @@ int getLongLongFromObject(robj *o, long long *target) {
     if (o == NULL) {
         value = 0;
     } else {
     if (o == NULL) {
         value = 0;
     } else {

-        redisAssert(o->type == REDIS_STRING);
+        redisAssertWithInfo(NULL,o,o->type == REDIS_STRING);

         if (o->encoding == REDIS_ENCODING_RAW) {
         if (o->encoding == REDIS_ENCODING_RAW) {

+            errno = 0;

             value = strtoll(o->ptr, &eptr, 10);
             value = strtoll(o->ptr, &eptr, 10);

-            if (eptr[0] != '\0') return REDIS_ERR;
-            if (errno == ERANGE && (value == LLONG_MIN || value == LLONG_MAX))
+            if (isspace(((char*)o->ptr)[0]) || eptr[0] != '\0' ||
+                errno == ERANGE)

                 return REDIS_ERR;
         } else if (o->encoding == REDIS_ENCODING_INT) {
             value = (long)o->ptr;
                 return REDIS_ERR;
         } else if (o->encoding == REDIS_ENCODING_INT) {
             value = (long)o->ptr;


@@ -375,7 +450,6 @@ int getLongLongFromObject(robj *o, long long *target) {
             redisPanic("Unknown string encoding");
         }
     }
             redisPanic("Unknown string encoding");
         }
     }

-

     if (target) *target = value;
     return REDIS_OK;
 }
     if (target) *target = value;
     return REDIS_OK;
 }


@@ -390,7 +464,6 @@ int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, con
         }
         return REDIS_ERR;
     }
         }
         return REDIS_ERR;
     }

-

     *target = value;
     return REDIS_OK;
 }
     *target = value;
     return REDIS_OK;
 }


@@ -407,7 +480,6 @@ int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *
         }
         return REDIS_ERR;
     }
         }
         return REDIS_ERR;
     }

-

     *target = value;
     return REDIS_OK;
 }
     *target = value;
     return REDIS_OK;
 }


@@ -417,7 +489,6 @@ char *strEncoding(int encoding) {
     case REDIS_ENCODING_RAW: return "raw";
     case REDIS_ENCODING_INT: return "int";
     case REDIS_ENCODING_HT: return "hashtable";
     case REDIS_ENCODING_RAW: return "raw";
     case REDIS_ENCODING_INT: return "int";
     case REDIS_ENCODING_HT: return "hashtable";

-    case REDIS_ENCODING_ZIPMAP: return "zipmap";

     case REDIS_ENCODING_LINKEDLIST: return "linkedlist";
     case REDIS_ENCODING_ZIPLIST: return "ziplist";
     case REDIS_ENCODING_INTSET: return "intset";
     case REDIS_ENCODING_LINKEDLIST: return "linkedlist";
     case REDIS_ENCODING_ZIPLIST: return "ziplist";
     case REDIS_ENCODING_INTSET: return "intset";


@@ -443,7 +514,7 @@ robj *objectCommandLookup(redisClient *c, robj *key) {
     dictEntry *de;
 
     if ((de = dictFind(c->db->dict,key->ptr)) == NULL) return NULL;
     dictEntry *de;
 
     if ((de = dictFind(c->db->dict,key->ptr)) == NULL) return NULL;

-    return (robj*) dictGetEntryVal(de);
+    return (robj*) dictGetVal(de);

 }
 
 robj *objectCommandLookupOrReply(redisClient *c, robj *key, robj *reply) {
 }
 
 robj *objectCommandLookupOrReply(redisClient *c, robj *key, robj *reply) {