* POSSIBILITY OF SUCH DAMAGE.
*/
-#define REDIS_VERSION "1.3.10"
+#define REDIS_VERSION "1.3.14"
#include "fmacros.h"
#include "config.h"
#include <sys/resource.h>
#include <sys/uio.h>
#include <limits.h>
+#include <float.h>
#include <math.h>
#include <pthread.h>
#include "zmalloc.h" /* total memory usage aware version of malloc/free */
#include "lzf.h" /* LZF compression library */
#include "pqsort.h" /* Partial qsort for SORT+LIMIT */
-#include "zipmap.h"
+#include "zipmap.h" /* Compact dictionary-alike data structure */
+#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */
+#include "release.h" /* Release and/or git repository information */
/* Error codes */
#define REDIS_OK 0
int daemonize;
int appendonly;
int appendfsync;
+ int shutdown_asap;
time_t lastfsync;
int appendfd;
int appendseldb;
} pubsubPattern;
typedef void redisCommandProc(redisClient *c);
+typedef void redisVmPreloadProc(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
struct redisCommand {
char *name;
redisCommandProc *proc;
/* Use a function to determine which keys need to be loaded
* in the background prior to executing this command. Takes precedence
* over vm_firstkey and others, ignored when NULL */
- redisCommandProc *vm_preload_proc;
+ redisVmPreloadProc *vm_preload_proc;
/* What keys should be loaded in background when calling this command? */
int vm_firstkey; /* The first argument that's a key (0 = no keys) */
int vm_lastkey; /* THe last argument that's a key */
static void waitEmptyIOJobsQueue(void);
static void vmReopenSwapFile(void);
static int vmFreePage(off_t page);
-static void zunionInterBlockClientOnSwappedKeys(redisClient *c);
-static int blockClientOnSwappedKeys(struct redisCommand *cmd, redisClient *c);
+static void zunionInterBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
+static void execBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
+static int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
static int dontWaitForSwappedKey(redisClient *c, robj *key);
static void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
static void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
static void freePubsubPattern(void *p);
static int listMatchPubsubPattern(void *a, void *b);
static int compareStringObjects(robj *a, robj *b);
+static int equalStringObjects(robj *a, robj *b);
static void usage();
static int rewriteAppendOnlyFileBackground(void);
static int vmSwapObjectBlocking(robj *key, robj *val);
+static int prepareForShutdown();
static void authCommand(redisClient *c);
static void pingCommand(redisClient *c);
static void hdelCommand(redisClient *c);
static void hlenCommand(redisClient *c);
static void zremrangebyrankCommand(redisClient *c);
-static void zunionCommand(redisClient *c);
-static void zinterCommand(redisClient *c);
+static void zunionstoreCommand(redisClient *c);
+static void zinterstoreCommand(redisClient *c);
static void hkeysCommand(redisClient *c);
static void hvalsCommand(redisClient *c);
static void hgetallCommand(redisClient *c);
{"zrem",zremCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
{"zremrangebyscore",zremrangebyscoreCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
{"zremrangebyrank",zremrangebyrankCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zunion",zunionCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
- {"zinter",zinterCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
+ {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
+ {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
{"zrange",zrangeCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
{"zrangebyscore",zrangebyscoreCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
{"zcount",zcountCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
{"lastsave",lastsaveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
{"type",typeCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
{"multi",multiCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"exec",execCommand,1,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,0,0,0},
+ {"exec",execCommand,1,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0},
{"discard",discardCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
{"sync",syncCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
{"flushdb",flushdbCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
return val*mul;
}
+/* Convert a long long into a string. Returns the number of
+ * characters needed to represent the number, that can be shorter if passed
+ * buffer length is not enough to store the whole number. */
+static int ll2string(char *s, size_t len, long long value) {
+ char buf[32], *p;
+ unsigned long long v;
+ size_t l;
+
+ if (len == 0) return 0;
+ v = (value < 0) ? -value : value;
+ p = buf+31; /* point to the last character */
+ do {
+ *p-- = '0'+(v%10);
+ v /= 10;
+ } while(v);
+ if (value < 0) *p-- = '-';
+ p++;
+ l = 32-(p-buf);
+ if (l+1 > len) l = len-1; /* Make sure it fits, including the nul term */
+ memcpy(s,p,l);
+ s[l] = '\0';
+ return l;
+}
+
static void redisLog(int level, const char *fmt, ...) {
va_list ap;
FILE *fp;
int cmp;
if (o1->encoding == REDIS_ENCODING_INT &&
- o2->encoding == REDIS_ENCODING_INT &&
- o1->ptr == o2->ptr) return 1;
+ o2->encoding == REDIS_ENCODING_INT)
+ return o1->ptr == o2->ptr;
o1 = getDecodedObject(o1);
o2 = getDecodedObject(o2);
char buf[32];
int len;
- len = snprintf(buf,32,"%ld",(long)o->ptr);
+ len = ll2string(buf,32,(long)o->ptr);
return dictGenHashFunction((unsigned char*)buf, len);
} else {
unsigned int hash;
* To access a global var is faster than calling time(NULL) */
server.unixtime = time(NULL);
+ /* We received a SIGTERM, shutting down here in a safe way, as it is
+ * not ok doing so inside the signal handler. */
+ if (server.shutdown_asap) {
+ if (prepareForShutdown() == REDIS_OK) exit(0);
+ redisLog(REDIS_WARNING,"SIGTERM received but errors trying to shut down the server, check the logs for more information");
+ }
+
/* Show some info about non-empty databases */
for (j = 0; j < server.dbnum; j++) {
long long size, used, vkeys;
server.glueoutputbuf = 1;
server.daemonize = 0;
server.appendonly = 0;
- server.appendfsync = APPENDFSYNC_ALWAYS;
+ server.appendfsync = APPENDFSYNC_EVERYSEC;
server.lastfsync = time(NULL);
server.appendfd = -1;
server.appendseldb = -1; /* Make sure the first time will not match */
server.vm_blocked_clients = 0;
server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES;
server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
+ server.shutdown_asap = 0;
resetServerSaveParams();
if ((server.appendonly = yesnotoi(argv[1])) == -1) {
err = "argument must be 'yes' or 'no'"; goto loaderr;
}
+ } else if (!strcasecmp(argv[0],"appendfilename") && argc == 2) {
+ zfree(server.appendfilename);
+ server.appendfilename = zstrdup(argv[1]);
} else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
if (!strcasecmp(argv[1],"no")) {
server.appendfsync = APPENDFSYNC_NO;
addReply(c,shared.queued);
} else {
if (server.vm_enabled && server.vm_max_threads > 0 &&
- blockClientOnSwappedKeys(cmd,c)) return 1;
+ blockClientOnSwappedKeys(c,cmd)) return 1;
call(c,cmd);
}
}
static int listMatchObjects(void *a, void *b) {
- return compareStringObjects(a,b) == 0;
+ return equalStringObjects(a,b);
}
static redisClient *createClient(int fd) {
(unsigned long) strlen(buf),buf));
}
-static void addReplyLong(redisClient *c, long l) {
- char buf[128];
- size_t len;
-
- if (l == 0) {
- addReply(c,shared.czero);
- return;
- } else if (l == 1) {
- addReply(c,shared.cone);
- return;
- }
- len = snprintf(buf,sizeof(buf),":%ld\r\n",l);
- addReplySds(c,sdsnewlen(buf,len));
-}
-
static void addReplyLongLong(redisClient *c, long long ll) {
char buf[128];
size_t len;
addReply(c,shared.cone);
return;
}
- len = snprintf(buf,sizeof(buf),":%lld\r\n",ll);
- addReplySds(c,sdsnewlen(buf,len));
+ buf[0] = ':';
+ len = ll2string(buf+1,sizeof(buf)-1,ll);
+ buf[len+1] = '\r';
+ buf[len+2] = '\n';
+ addReplySds(c,sdsnewlen(buf,len+3));
}
static void addReplyUlong(redisClient *c, unsigned long ul) {
}
static void addReplyBulkLen(redisClient *c, robj *obj) {
- size_t len;
+ size_t len, intlen;
+ char buf[128];
if (obj->encoding == REDIS_ENCODING_RAW) {
len = sdslen(obj->ptr);
len++;
}
}
- addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",(unsigned long)len));
+ buf[0] = '$';
+ intlen = ll2string(buf+1,sizeof(buf)-1,(long long)len);
+ buf[intlen+1] = '\r';
+ buf[intlen+2] = '\n';
+ addReplySds(c,sdsnewlen(buf,intlen+3));
}
static void addReplyBulk(redisClient *c, robj *obj) {
incrRefCount(shared.integers[value]);
o = shared.integers[value];
} else {
- o = createObject(REDIS_STRING, NULL);
if (value >= LONG_MIN && value <= LONG_MAX) {
+ o = createObject(REDIS_STRING, NULL);
o->encoding = REDIS_ENCODING_INT;
o->ptr = (void*)((long)value);
} else {
- o->ptr = sdscatprintf(sdsempty(),"%lld",value);
+ o = createObject(REDIS_STRING,sdsfromlonglong(value));
}
}
return o;
value = strtol(s, &endptr, 10);
if (endptr[0] != '\0') return REDIS_ERR;
- slen = snprintf(buf,32,"%ld",value);
+ slen = ll2string(buf,32,value);
/* If the number converted back into a string is not identical
* then it's not possible to encode the string as integer */
if (o->type == REDIS_STRING && o->encoding == REDIS_ENCODING_INT) {
char buf[32];
- snprintf(buf,32,"%ld",(long)o->ptr);
+ ll2string(buf,32,(long)o->ptr);
dec = createStringObject(buf,strlen(buf));
return dec;
} else {
/* Compare two string objects via strcmp() or alike.
* Note that the objects may be integer-encoded. In such a case we
- * use snprintf() to get a string representation of the numbers on the stack
+ * use ll2string() to get a string representation of the numbers on the stack
* and compare the strings, it's much faster than calling getDecodedObject().
*
* Important note: if objects are not integer encoded, but binary-safe strings,
if (a == b) return 0;
if (a->encoding != REDIS_ENCODING_RAW) {
- snprintf(bufa,sizeof(bufa),"%ld",(long) a->ptr);
+ ll2string(bufa,sizeof(bufa),(long) a->ptr);
astr = bufa;
bothsds = 0;
} else {
astr = a->ptr;
}
if (b->encoding != REDIS_ENCODING_RAW) {
- snprintf(bufb,sizeof(bufb),"%ld",(long) b->ptr);
+ ll2string(bufb,sizeof(bufb),(long) b->ptr);
bstr = bufb;
bothsds = 0;
} else {
return bothsds ? sdscmp(astr,bstr) : strcmp(astr,bstr);
}
+/* Equal string objects return 1 if the two objects are the same from the
+ * point of view of a string comparison, otherwise 0 is returned. Note that
+ * this function is faster then checking for (compareStringObject(a,b) == 0)
+ * because it can perform some more optimization. */
+static int equalStringObjects(robj *a, robj *b) {
+ if (a->encoding != REDIS_ENCODING_RAW && b->encoding != REDIS_ENCODING_RAW){
+ return a->ptr == b->ptr;
+ } else {
+ return compareStringObjects(a,b) == 0;
+ }
+}
+
static size_t stringObjectLen(robj *o) {
redisAssert(o->type == REDIS_STRING);
if (o->encoding == REDIS_ENCODING_RAW) {
} else {
char buf[32];
- return snprintf(buf,32,"%ld",(long)o->ptr);
+ return ll2string(buf,32,(long)o->ptr);
}
}
return 0;
}
-/* String objects in the form "2391" "-100" without any space and with a
- * range of values that can fit in an 8, 16 or 32 bit signed value can be
- * encoded as integers to save space */
-static int rdbTryIntegerEncoding(char *s, size_t len, unsigned char *enc) {
- long long value;
- char *endptr, buf[32];
-
- /* Check if it's possible to encode this value as a number */
- value = strtoll(s, &endptr, 10);
- if (endptr[0] != '\0') return 0;
- snprintf(buf,32,"%lld",value);
-
- /* If the number converted back into a string is not identical
- * then it's not possible to encode the string as integer */
- if (strlen(buf) != len || memcmp(buf,s,len)) return 0;
-
+/* Encode 'value' as an integer if possible (if integer will fit the
+ * supported range). If the function sucessful encoded the integer
+ * then the (up to 5 bytes) encoded representation is written in the
+ * string pointed by 'enc' and the length is returned. Otherwise
+ * 0 is returned. */
+static int rdbEncodeInteger(long long value, unsigned char *enc) {
/* Finally check if it fits in our ranges */
if (value >= -(1<<7) && value <= (1<<7)-1) {
enc[0] = (REDIS_RDB_ENCVAL<<6)|REDIS_RDB_ENC_INT8;
}
}
+/* String objects in the form "2391" "-100" without any space and with a
+ * range of values that can fit in an 8, 16 or 32 bit signed value can be
+ * encoded as integers to save space */
+static int rdbTryIntegerEncoding(char *s, size_t len, unsigned char *enc) {
+ long long value;
+ char *endptr, buf[32];
+
+ /* Check if it's possible to encode this value as a number */
+ value = strtoll(s, &endptr, 10);
+ if (endptr[0] != '\0') return 0;
+ ll2string(buf,32,value);
+
+ /* If the number converted back into a string is not identical
+ * then it's not possible to encode the string as integer */
+ if (strlen(buf) != len || memcmp(buf,s,len)) return 0;
+
+ return rdbEncodeInteger(value,enc);
+}
+
static int rdbSaveLzfStringObject(FILE *fp, unsigned char *s, size_t len) {
size_t comprlen, outlen;
unsigned char byte;
static int rdbSaveStringObject(FILE *fp, robj *obj) {
int retval;
+ /* Avoid to decode the object, then encode it again, if the
+ * object is alrady integer encoded. */
+ if (obj->encoding == REDIS_ENCODING_INT) {
+ long val = (long) obj->ptr;
+ unsigned char buf[5];
+ int enclen;
+
+ if ((enclen = rdbEncodeInteger(val,buf)) > 0) {
+ if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ return 0;
+ }
+ /* otherwise... fall throught and continue with the usual
+ * code path. */
+ }
+
/* Avoid incr/decr ref count business when possible.
* This plays well with copy-on-write given that we are probably
* in a child process (BGSAVE). Also this makes sure key objects
len = 1;
buf[0] = (val < 0) ? 255 : 254;
} else {
- snprintf((char*)buf+1,sizeof(buf)-1,"%.17g",val);
+#if (DBL_MANT_DIG >= 52) && (LLONG_MAX == 0x7fffffffffffffffLL)
+ /* Check if the float is in a safe range to be casted into a
+ * long long. We are assuming that long long is 64 bit here.
+ * Also we are assuming that there are no implementations around where
+ * double has precision < 52 bit.
+ *
+ * Under this assumptions we test if a double is inside an interval
+ * where casting to long long is safe. Then using two castings we
+ * make sure the decimal part is zero. If all this is true we use
+ * integer printing function that is much faster. */
+ double min = -4503599627370495; /* (2^52)-1 */
+ double max = 4503599627370496; /* -(2^52) */
+ if (val > min && val < max && val == ((double)((long long)val)))
+ ll2string((char*)buf+1,sizeof(buf),(long long)val);
+ else
+#endif
+ snprintf((char*)buf+1,sizeof(buf)-1,"%.17g",val);
buf[0] = strlen((char*)buf+1);
len = buf[0]+1;
}
}
}
-static robj *rdbLoadIntegerObject(FILE *fp, int enctype) {
+/* Load an integer-encoded object from file 'fp', with the specified
+ * encoding type 'enctype'. If encode is true the function may return
+ * an integer-encoded object as reply, otherwise the returned object
+ * will always be encoded as a raw string. */
+static robj *rdbLoadIntegerObject(FILE *fp, int enctype, int encode) {
unsigned char enc[4];
long long val;
val = 0; /* anti-warning */
redisPanic("Unknown RDB integer encoding type");
}
- return createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",val));
+ if (encode)
+ return createStringObjectFromLongLong(val);
+ else
+ return createObject(REDIS_STRING,sdsfromlonglong(val));
}
static robj *rdbLoadLzfStringObject(FILE*fp) {
return NULL;
}
-static robj *rdbLoadStringObject(FILE*fp) {
+static robj *rdbGenericLoadStringObject(FILE*fp, int encode) {
int isencoded;
uint32_t len;
sds val;
case REDIS_RDB_ENC_INT8:
case REDIS_RDB_ENC_INT16:
case REDIS_RDB_ENC_INT32:
- return rdbLoadIntegerObject(fp,len);
+ return rdbLoadIntegerObject(fp,len,encode);
case REDIS_RDB_ENC_LZF:
return rdbLoadLzfStringObject(fp);
default:
return createObject(REDIS_STRING,val);
}
+static robj *rdbLoadStringObject(FILE *fp) {
+ return rdbGenericLoadStringObject(fp,0);
+}
+
+static robj *rdbLoadEncodedStringObject(FILE *fp) {
+ return rdbGenericLoadStringObject(fp,1);
+}
+
/* For information about double serialization check rdbSaveDoubleValue() */
static int rdbLoadDoubleValue(FILE *fp, double *val) {
char buf[128];
redisLog(REDIS_DEBUG,"LOADING OBJECT %d (at %d)\n",type,ftell(fp));
if (type == REDIS_STRING) {
/* Read string value */
- if ((o = rdbLoadStringObject(fp)) == NULL) return NULL;
+ if ((o = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
o = tryObjectEncoding(o);
} else if (type == REDIS_LIST || type == REDIS_SET) {
/* Read list/set value */
while(listlen--) {
robj *ele;
- if ((ele = rdbLoadStringObject(fp)) == NULL) return NULL;
+ if ((ele = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
ele = tryObjectEncoding(ele);
if (type == REDIS_LIST) {
listAddNodeTail((list*)o->ptr,ele);
robj *ele;
double *score = zmalloc(sizeof(double));
- if ((ele = rdbLoadStringObject(fp)) == NULL) return NULL;
+ if ((ele = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
ele = tryObjectEncoding(ele);
if (rdbLoadDoubleValue(fp,score) == -1) return NULL;
dictAdd(zs->dict,ele,score);
if ((key = rdbLoadStringObject(fp)) == NULL) goto eoferr;
/* Read value */
if ((val = rdbLoadObject(type,fp)) == NULL) goto eoferr;
+ /* Check if the key already expired */
+ if (expiretime != -1 && expiretime < now) {
+ decrRefCount(key);
+ decrRefCount(val);
+ continue;
+ }
/* Add the new object in the hash table */
retval = dictAdd(d,key,val);
if (retval == DICT_ERR) {
}
loadedkeys++;
/* Set the expire time if needed */
- if (expiretime != -1) {
- setExpire(db,key,expiretime);
- /* Delete this key if already expired */
- if (expiretime < now) {
- deleteKey(db,key);
- continue; /* don't try to swap this out */
- }
- }
+ if (expiretime != -1) setExpire(db,key,expiretime);
/* Handle swapping while loading big datasets when VM is on */
return REDIS_ERR; /* Just to avoid warning */
}
+/*================================== Shutdown =============================== */
+static int prepareForShutdown() {
+ redisLog(REDIS_WARNING,"User requested shutdown, saving DB...");
+ /* Kill the saving child if there is a background saving in progress.
+ We want to avoid race conditions, for instance our saving child may
+ overwrite the synchronous saving did by SHUTDOWN. */
+ if (server.bgsavechildpid != -1) {
+ redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
+ kill(server.bgsavechildpid,SIGKILL);
+ rdbRemoveTempFile(server.bgsavechildpid);
+ }
+ if (server.appendonly) {
+ /* Append only file: fsync() the AOF and exit */
+ fsync(server.appendfd);
+ if (server.vm_enabled) unlink(server.vm_swap_file);
+ } else {
+ /* Snapshotting. Perform a SYNC SAVE and exit */
+ if (rdbSave(server.dbfilename) == REDIS_OK) {
+ if (server.daemonize)
+ unlink(server.pidfile);
+ redisLog(REDIS_WARNING,"%zu bytes used at exit",zmalloc_used_memory());
+ } else {
+ /* Ooops.. error saving! The best we can do is to continue
+ * operating. Note that if there was a background saving process,
+ * in the next cron() Redis will be notified that the background
+ * saving aborted, handling special stuff like slaves pending for
+ * synchronization... */
+ redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit");
+ return REDIS_ERR;
+ }
+ }
+ redisLog(REDIS_WARNING,"Server exit now, bye bye...");
+ return REDIS_OK;
+}
+
/*================================== Commands =============================== */
static void authCommand(redisClient *c) {
robj *o;
o = lookupKeyWrite(c->db,c->argv[1]);
-
- if (getLongLongFromObjectOrReply(c, o, &value, NULL) != REDIS_OK) return;
+ if (o != NULL && checkType(c,o,REDIS_STRING)) return;
+ if (getLongLongFromObjectOrReply(c,o,&value,NULL) != REDIS_OK) return;
value += incr;
- o = createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",value));
- o = tryObjectEncoding(o);
+ o = createStringObjectFromLongLong(value);
retval = dictAdd(c->db->dict,c->argv[1],o);
if (retval == DICT_ERR) {
dictReplace(c->db->dict,c->argv[1],o);
deleted++;
}
}
- addReplyLong(c,deleted);
+ addReplyLongLong(c,deleted);
}
static void existsCommand(redisClient *c) {
- addReply(c,lookupKeyRead(c->db,c->argv[1]) ? shared.cone : shared.czero);
+ expireIfNeeded(c->db,c->argv[1]);
+ if (dictFind(c->db->dict,c->argv[1])) {
+ addReply(c, shared.cone);
+ } else {
+ addReply(c, shared.czero);
+ }
}
static void selectCommand(redisClient *c) {
}
static void shutdownCommand(redisClient *c) {
- redisLog(REDIS_WARNING,"User requested shutdown, saving DB...");
- /* Kill the saving child if there is a background saving in progress.
- We want to avoid race conditions, for instance our saving child may
- overwrite the synchronous saving did by SHUTDOWN. */
- if (server.bgsavechildpid != -1) {
- redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
- kill(server.bgsavechildpid,SIGKILL);
- rdbRemoveTempFile(server.bgsavechildpid);
- }
- if (server.appendonly) {
- /* Append only file: fsync() the AOF and exit */
- fsync(server.appendfd);
- if (server.vm_enabled) unlink(server.vm_swap_file);
+ if (prepareForShutdown() == REDIS_OK)
exit(0);
- } else {
- /* Snapshotting. Perform a SYNC SAVE and exit */
- if (rdbSave(server.dbfilename) == REDIS_OK) {
- if (server.daemonize)
- unlink(server.pidfile);
- redisLog(REDIS_WARNING,"%zu bytes used at exit",zmalloc_used_memory());
- redisLog(REDIS_WARNING,"Server exit now, bye bye...");
- exit(0);
- } else {
- /* Ooops.. error saving! The best we can do is to continue
- * operating. Note that if there was a background saving process,
- * in the next cron() Redis will be notified that the background
- * saving aborted, handling special stuff like slaves pending for
- * synchronization... */
- redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit");
- addReplySds(c,
- sdsnew("-ERR can't quit, problems saving the DB\r\n"));
- }
- }
+ addReplySds(c, sdsnew("-ERR Errors trying to SHUTDOWN. Check logs.\r\n"));
}
static void renameGenericCommand(redisClient *c, int nx) {
incrRefCount(c->argv[2]);
}
server.dirty++;
- addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",listLength(list)));
+ addReplyLongLong(c,listLength(list));
}
static void lpushCommand(redisClient *c) {
robj *ele = listNodeValue(ln);
next = fromtail ? ln->prev : ln->next;
- if (compareStringObjects(ele,c->argv[3]) == 0) {
+ if (equalStringObjects(ele,c->argv[3])) {
listDelNode(list,ln);
server.dirty++;
removed++;
if (dictSize((dict*)dstset->ptr) > 0) {
dictAdd(c->db->dict,dstkey,dstset);
incrRefCount(dstkey);
- addReplyLong(c,dictSize((dict*)dstset->ptr));
+ addReplyLongLong(c,dictSize((dict*)dstset->ptr));
} else {
decrRefCount(dstset);
addReply(c,shared.czero);
if (dictSize((dict*)dstset->ptr) > 0) {
dictAdd(c->db->dict,dstkey,dstset);
incrRefCount(dstkey);
- addReplyLong(c,dictSize((dict*)dstset->ptr));
+ addReplyLongLong(c,dictSize((dict*)dstset->ptr));
} else {
decrRefCount(dstset);
addReply(c,shared.czero);
zskiplistNode *zn = zmalloc(sizeof(*zn));
zn->forward = zmalloc(sizeof(zskiplistNode*) * level);
- if (level > 0)
+ if (level > 1)
zn->span = zmalloc(sizeof(unsigned int) * (level - 1));
+ else
+ zn->span = NULL;
zn->score = score;
zn->obj = obj;
return zn;
/* We may have multiple elements with the same score, what we need
* is to find the element with both the right score and object. */
x = x->forward[0];
- if (x && score == x->score && compareStringObjects(x->obj,obj) == 0) {
+ if (x && score == x->score && equalStringObjects(x->obj,obj)) {
zslDeleteNode(zsl, x, update);
zslFreeNode(x);
return 1;
}
/* x might be equal to zsl->header, so test if obj is non-NULL */
- if (x->obj && compareStringObjects(x->obj,o) == 0) {
+ if (x->obj && equalStringObjects(x->obj,o)) {
return rank;
}
}
if (htNeedsResize(zs->dict)) dictResize(zs->dict);
if (dictSize(zs->dict) == 0) deleteKey(c->db,c->argv[1]);
server.dirty += deleted;
- addReplyLong(c,deleted);
+ addReplyLongLong(c,deleted);
}
static void zremrangebyrankCommand(redisClient *c) {
if (htNeedsResize(zs->dict)) dictResize(zs->dict);
if (dictSize(zs->dict) == 0) deleteKey(c->db,c->argv[1]);
server.dirty += deleted;
- addReplyLong(c, deleted);
+ addReplyLongLong(c, deleted);
}
typedef struct {
/* expect zsetnum input keys to be given */
zsetnum = atoi(c->argv[2]->ptr);
if (zsetnum < 1) {
- addReplySds(c,sdsnew("-ERR at least 1 input key is needed for ZUNION/ZINTER\r\n"));
+ addReplySds(c,sdsnew("-ERR at least 1 input key is needed for ZUNIONSTORE/ZINTERSTORE\r\n"));
return;
}
if (dstzset->zsl->length) {
dictAdd(c->db->dict,dstkey,dstobj);
incrRefCount(dstkey);
- addReplyLong(c, dstzset->zsl->length);
+ addReplyLongLong(c, dstzset->zsl->length);
server.dirty++;
} else {
decrRefCount(dstobj);
zfree(src);
}
-static void zunionCommand(redisClient *c) {
+static void zunionstoreCommand(redisClient *c) {
zunionInterGenericCommand(c,c->argv[1], REDIS_OP_UNION);
}
-static void zinterCommand(redisClient *c) {
+static void zinterstoreCommand(redisClient *c) {
zunionInterGenericCommand(c,c->argv[1], REDIS_OP_INTER);
}
if (limit > 0) limit--;
}
if (justcount) {
- addReplyLong(c,(long)rangelen);
+ addReplyLongLong(c,(long)rangelen);
} else {
lenobj->ptr = sdscatprintf(sdsempty(),"*%lu\r\n",
withscores ? (rangelen*2) : rangelen);
rank = zslGetRank(zsl, *score, c->argv[2]);
if (rank) {
if (reverse) {
- addReplyLong(c, zsl->length - rank);
+ addReplyLongLong(c, zsl->length - rank);
} else {
- addReplyLong(c, rank-1);
+ addReplyLongLong(c, rank-1);
}
} else {
addReply(c,shared.nullbulk);
bytesToHuman(hmem,zmalloc_used_memory());
info = sdscatprintf(sdsempty(),
"redis_version:%s\r\n"
+ "redis_git_sha1:%s\r\n"
+ "redis_git_dirty:%d\r\n"
"arch_bits:%s\r\n"
"multiplexing_api:%s\r\n"
"process_id:%ld\r\n"
"total_connections_received:%lld\r\n"
"total_commands_processed:%lld\r\n"
"expired_keys:%lld\r\n"
- "hash_max_zipmap_entries:%ld\r\n"
- "hash_max_zipmap_value:%ld\r\n"
+ "hash_max_zipmap_entries:%zu\r\n"
+ "hash_max_zipmap_value:%zu\r\n"
"pubsub_channels:%ld\r\n"
"pubsub_patterns:%u\r\n"
"vm_enabled:%d\r\n"
"role:%s\r\n"
,REDIS_VERSION,
+ REDIS_GIT_SHA1,
+ strtol(REDIS_GIT_DIRTY,NULL,10) > 0,
(sizeof(long) == 8) ? "64" : "32",
aeGetApiName(),
(long) getpid(),
}
}
+static sds catAppendOnlyGenericCommand(sds buf, int argc, robj **argv) {
+ int j;
+ buf = sdscatprintf(buf,"*%d\r\n",argc);
+ for (j = 0; j < argc; j++) {
+ robj *o = getDecodedObject(argv[j]);
+ buf = sdscatprintf(buf,"$%lu\r\n",(unsigned long)sdslen(o->ptr));
+ buf = sdscatlen(buf,o->ptr,sdslen(o->ptr));
+ buf = sdscatlen(buf,"\r\n",2);
+ decrRefCount(o);
+ }
+ return buf;
+}
+
+static sds catAppendOnlyExpireAtCommand(sds buf, robj *key, robj *seconds) {
+ int argc = 3;
+ long when;
+ robj *argv[3];
+
+ /* Make sure we can use strtol */
+ seconds = getDecodedObject(seconds);
+ when = time(NULL)+strtol(seconds->ptr,NULL,10);
+ decrRefCount(seconds);
+
+ argv[0] = createStringObject("EXPIREAT",8);
+ argv[1] = key;
+ argv[2] = createObject(REDIS_STRING,
+ sdscatprintf(sdsempty(),"%ld",when));
+ buf = catAppendOnlyGenericCommand(buf, argc, argv);
+ decrRefCount(argv[0]);
+ decrRefCount(argv[2]);
+ return buf;
+}
+
static void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc) {
sds buf = sdsempty();
- int j;
robj *tmpargv[3];
/* The DB this command was targetting is not the same as the last command
server.appendseldb = dictid;
}
- /* "Fix" the argv vector if the command is EXPIRE. We want to translate
- * EXPIREs into EXPIREATs calls */
if (cmd->proc == expireCommand) {
- long when;
-
- tmpargv[0] = createStringObject("EXPIREAT",8);
+ /* Translate EXPIRE into EXPIREAT */
+ buf = catAppendOnlyExpireAtCommand(buf,argv[1],argv[2]);
+ } else if (cmd->proc == setexCommand) {
+ /* Translate SETEX to SET and EXPIREAT */
+ tmpargv[0] = createStringObject("SET",3);
tmpargv[1] = argv[1];
- incrRefCount(argv[1]);
- when = time(NULL)+strtol(argv[2]->ptr,NULL,10);
- tmpargv[2] = createObject(REDIS_STRING,
- sdscatprintf(sdsempty(),"%ld",when));
- argv = tmpargv;
- }
-
- /* Append the actual command */
- buf = sdscatprintf(buf,"*%d\r\n",argc);
- for (j = 0; j < argc; j++) {
- robj *o = argv[j];
-
- o = getDecodedObject(o);
- buf = sdscatprintf(buf,"$%lu\r\n",(unsigned long)sdslen(o->ptr));
- buf = sdscatlen(buf,o->ptr,sdslen(o->ptr));
- buf = sdscatlen(buf,"\r\n",2);
- decrRefCount(o);
- }
-
- /* Free the objects from the modified argv for EXPIREAT */
- if (cmd->proc == expireCommand) {
- for (j = 0; j < 3; j++)
- decrRefCount(argv[j]);
+ tmpargv[2] = argv[3];
+ buf = catAppendOnlyGenericCommand(buf,3,tmpargv);
+ decrRefCount(tmpargv[0]);
+ buf = catAppendOnlyExpireAtCommand(buf,argv[1],argv[2]);
+ } else {
+ buf = catAppendOnlyGenericCommand(buf,argc,argv);
}
/* Append to the AOF buffer. This will be flushed on disk just before
* as a fully non-blocking VM.
*/
+/* Called when the user switches from "appendonly yes" to "appendonly no"
+ * at runtime using the CONFIG command. */
+static void stopAppendOnly(void) {
+ flushAppendOnlyFile();
+ fsync(server.appendfd);
+ close(server.appendfd);
+
+ server.appendfd = -1;
+ server.appendseldb = -1;
+ server.appendonly = 0;
+ /* rewrite operation in progress? kill it, wait child exit */
+ if (server.bgsavechildpid != -1) {
+ int statloc;
+
+ if (kill(server.bgsavechildpid,SIGKILL) != -1)
+ wait3(&statloc,0,NULL);
+ /* reset the buffer accumulating changes while the child saves */
+ sdsfree(server.bgrewritebuf);
+ server.bgrewritebuf = sdsempty();
+ server.bgsavechildpid = -1;
+ }
+}
+
+/* Called when the user switches from "appendonly no" to "appendonly yes"
+ * at runtime using the CONFIG command. */
+static int startAppendOnly(void) {
+ server.appendonly = 1;
+ server.lastfsync = time(NULL);
+ server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);
+ if (server.appendfd == -1) {
+ redisLog(REDIS_WARNING,"Used tried to switch on AOF via CONFIG, but I can't open the AOF file: %s",strerror(errno));
+ return REDIS_ERR;
+ }
+ if (rewriteAppendOnlyFileBackground() == REDIS_ERR) {
+ server.appendonly = 0;
+ close(server.appendfd);
+ redisLog(REDIS_WARNING,"Used tried to switch on AOF via CONFIG, I can't trigger a background AOF rewrite operation. Check the above logs for more info about the error.",strerror(errno));
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
/* =================== Virtual Memory - Blocking Side ====================== */
static void vmInit(void) {
return 1;
}
-/* Preload keys needed for the ZUNION and ZINTER commands. */
-static void zunionInterBlockClientOnSwappedKeys(redisClient *c) {
+/* Preload keys for any command with first, last and step values for
+ * the command keys prototype, as defined in the command table. */
+static void waitForMultipleSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv) {
+ int j, last;
+ if (cmd->vm_firstkey == 0) return;
+ last = cmd->vm_lastkey;
+ if (last < 0) last = argc+last;
+ for (j = cmd->vm_firstkey; j <= last; j += cmd->vm_keystep) {
+ redisAssert(j < argc);
+ waitForSwappedKey(c,argv[j]);
+ }
+}
+
+/* Preload keys needed for the ZUNIONSTORE and ZINTERSTORE commands.
+ * Note that the number of keys to preload is user-defined, so we need to
+ * apply a sanity check against argc. */
+static void zunionInterBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv) {
int i, num;
- num = atoi(c->argv[2]->ptr);
+ REDIS_NOTUSED(cmd);
+
+ num = atoi(argv[2]->ptr);
+ if (num > (argc-3)) return;
for (i = 0; i < num; i++) {
- waitForSwappedKey(c,c->argv[3+i]);
+ waitForSwappedKey(c,argv[3+i]);
+ }
+}
+
+/* Preload keys needed to execute the entire MULTI/EXEC block.
+ *
+ * This function is called by blockClientOnSwappedKeys when EXEC is issued,
+ * and will block the client when any command requires a swapped out value. */
+static void execBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv) {
+ int i, margc;
+ struct redisCommand *mcmd;
+ robj **margv;
+ REDIS_NOTUSED(cmd);
+ REDIS_NOTUSED(argc);
+ REDIS_NOTUSED(argv);
+
+ if (!(c->flags & REDIS_MULTI)) return;
+ for (i = 0; i < c->mstate.count; i++) {
+ mcmd = c->mstate.commands[i].cmd;
+ margc = c->mstate.commands[i].argc;
+ margv = c->mstate.commands[i].argv;
+
+ if (mcmd->vm_preload_proc != NULL) {
+ mcmd->vm_preload_proc(c,mcmd,margc,margv);
+ } else {
+ waitForMultipleSwappedKeys(c,mcmd,margc,margv);
+ }
}
}
*
* Return 1 if the client is marked as blocked, 0 if the client can
* continue as the keys it is going to access appear to be in memory. */
-static int blockClientOnSwappedKeys(struct redisCommand *cmd, redisClient *c) {
- int j, last;
-
+static int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd) {
if (cmd->vm_preload_proc != NULL) {
- cmd->vm_preload_proc(c);
+ cmd->vm_preload_proc(c,cmd,c->argc,c->argv);
} else {
- if (cmd->vm_firstkey == 0) return 0;
- last = cmd->vm_lastkey;
- if (last < 0) last = c->argc+last;
- for (j = cmd->vm_firstkey; j <= last; j += cmd->vm_keystep)
- waitForSwappedKey(c,c->argv[j]);
+ waitForMultipleSwappedKeys(c,cmd,c->argc,c->argv);
}
/* If the client was blocked for at least one key, mark it as blocked. */
/* Remove the key from the list of keys this client is waiting for. */
listRewind(c->io_keys,&li);
while ((ln = listNext(&li)) != NULL) {
- if (compareStringObjects(ln->value,key) == 0) {
+ if (equalStringObjects(ln->value,key)) {
listDelNode(c->io_keys,ln);
break;
}
static void configSetCommand(redisClient *c) {
robj *o = getDecodedObject(c->argv[3]);
+ long long ll;
+
if (!strcasecmp(c->argv[2]->ptr,"dbfilename")) {
zfree(server.dbfilename);
server.dbfilename = zstrdup(o->ptr);
zfree(server.masterauth);
server.masterauth = zstrdup(o->ptr);
} else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
- server.maxmemory = strtoll(o->ptr, NULL, 10);
+ if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
+ ll < 0) goto badfmt;
+ server.maxmemory = ll;
+ } else if (!strcasecmp(c->argv[2]->ptr,"timeout")) {
+ if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
+ ll < 0 || ll > LONG_MAX) goto badfmt;
+ server.maxidletime = ll;
+ } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
+ if (!strcasecmp(o->ptr,"no")) {
+ server.appendfsync = APPENDFSYNC_NO;
+ } else if (!strcasecmp(o->ptr,"everysec")) {
+ server.appendfsync = APPENDFSYNC_EVERYSEC;
+ } else if (!strcasecmp(o->ptr,"always")) {
+ server.appendfsync = APPENDFSYNC_ALWAYS;
+ } else {
+ goto badfmt;
+ }
+ } else if (!strcasecmp(c->argv[2]->ptr,"appendonly")) {
+ int old = server.appendonly;
+ int new = yesnotoi(o->ptr);
+
+ if (new == -1) goto badfmt;
+ if (old != new) {
+ if (new == 0) {
+ stopAppendOnly();
+ } else {
+ if (startAppendOnly() == REDIS_ERR) {
+ addReplySds(c,sdscatprintf(sdsempty(),
+ "-ERR Unable to turn on AOF. Check server logs.\r\n"));
+ decrRefCount(o);
+ return;
+ }
+ }
+ }
+ } else if (!strcasecmp(c->argv[2]->ptr,"save")) {
+ int vlen, j;
+ sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
+
+ /* Perform sanity check before setting the new config:
+ * - Even number of args
+ * - Seconds >= 1, changes >= 0 */
+ if (vlen & 1) {
+ sdsfreesplitres(v,vlen);
+ goto badfmt;
+ }
+ for (j = 0; j < vlen; j++) {
+ char *eptr;
+ long val;
+
+ val = strtoll(v[j], &eptr, 10);
+ if (eptr[0] != '\0' ||
+ ((j & 1) == 0 && val < 1) ||
+ ((j & 1) == 1 && val < 0)) {
+ sdsfreesplitres(v,vlen);
+ goto badfmt;
+ }
+ }
+ /* Finally set the new config */
+ resetServerSaveParams();
+ for (j = 0; j < vlen; j += 2) {
+ time_t seconds;
+ int changes;
+
+ seconds = strtoll(v[j],NULL,10);
+ changes = strtoll(v[j+1],NULL,10);
+ appendServerSaveParams(seconds, changes);
+ }
+ sdsfreesplitres(v,vlen);
} else {
addReplySds(c,sdscatprintf(sdsempty(),
"-ERR not supported CONFIG parameter %s\r\n",
}
decrRefCount(o);
addReply(c,shared.ok);
+ return;
+
+badfmt: /* Bad format errors */
+ addReplySds(c,sdscatprintf(sdsempty(),
+ "-ERR invalid argument '%s' for CONFIG SET '%s'\r\n",
+ (char*)o->ptr,
+ (char*)c->argv[2]->ptr));
+ decrRefCount(o);
}
static void configGetCommand(redisClient *c) {
if (stringmatch(pattern,"maxmemory",0)) {
char buf[128];
- snprintf(buf,128,"%llu\n",server.maxmemory);
+ ll2string(buf,128,server.maxmemory);
addReplyBulkCString(c,"maxmemory");
addReplyBulkCString(c,buf);
matches++;
}
+ if (stringmatch(pattern,"timeout",0)) {
+ char buf[128];
+
+ ll2string(buf,128,server.maxidletime);
+ addReplyBulkCString(c,"timeout");
+ addReplyBulkCString(c,buf);
+ matches++;
+ }
+ if (stringmatch(pattern,"appendonly",0)) {
+ addReplyBulkCString(c,"appendonly");
+ addReplyBulkCString(c,server.appendonly ? "yes" : "no");
+ matches++;
+ }
+ if (stringmatch(pattern,"appendfsync",0)) {
+ char *policy;
+
+ switch(server.appendfsync) {
+ case APPENDFSYNC_NO: policy = "no"; break;
+ case APPENDFSYNC_EVERYSEC: policy = "everysec"; break;
+ case APPENDFSYNC_ALWAYS: policy = "always"; break;
+ default: policy = "unknown"; break; /* too harmless to panic */
+ }
+ addReplyBulkCString(c,"appendfsync");
+ addReplyBulkCString(c,policy);
+ matches++;
+ }
+ if (stringmatch(pattern,"save",0)) {
+ sds buf = sdsempty();
+ int j;
+
+ for (j = 0; j < server.saveparamslen; j++) {
+ buf = sdscatprintf(buf,"%ld %d",
+ server.saveparams[j].seconds,
+ server.saveparams[j].changes);
+ if (j != server.saveparamslen-1)
+ buf = sdscatlen(buf," ",1);
+ }
+ addReplyBulkCString(c,"save");
+ addReplyBulkCString(c,buf);
+ sdsfree(buf);
+ matches++;
+ }
decrRefCount(o);
lenobj->ptr = sdscatprintf(sdsempty(),"*%d\r\n",matches*2);
}
pubsubPattern *pa = a, *pb = b;
return (pa->client == pb->client) &&
- (compareStringObjects(pa->pattern,pb->pattern) == 0);
+ (equalStringObjects(pa->pattern,pb->pattern));
}
/* Subscribe a client to a channel. Returns 1 if the operation succeeded, or
addReply(c,shared.mbulk3);
addReply(c,shared.subscribebulk);
addReplyBulk(c,channel);
- addReplyLong(c,dictSize(c->pubsub_channels)+listLength(c->pubsub_patterns));
+ addReplyLongLong(c,dictSize(c->pubsub_channels)+listLength(c->pubsub_patterns));
return retval;
}
addReply(c,shared.mbulk3);
addReply(c,shared.unsubscribebulk);
addReplyBulk(c,channel);
- addReplyLong(c,dictSize(c->pubsub_channels)+
+ addReplyLongLong(c,dictSize(c->pubsub_channels)+
listLength(c->pubsub_patterns));
}
addReply(c,shared.mbulk3);
addReply(c,shared.psubscribebulk);
addReplyBulk(c,pattern);
- addReplyLong(c,dictSize(c->pubsub_channels)+listLength(c->pubsub_patterns));
+ addReplyLongLong(c,dictSize(c->pubsub_channels)+listLength(c->pubsub_patterns));
return retval;
}
addReply(c,shared.mbulk3);
addReply(c,shared.punsubscribebulk);
addReplyBulk(c,pattern);
- addReplyLong(c,dictSize(c->pubsub_channels)+
+ addReplyLongLong(c,dictSize(c->pubsub_channels)+
listLength(c->pubsub_patterns));
}
decrRefCount(pattern);
static void publishCommand(redisClient *c) {
int receivers = pubsubPublishMessage(c->argv[1],c->argv[2]);
- addReplyLong(c,receivers);
+ addReplyLongLong(c,receivers);
}
/* ================================= Debugging ============================== */
+/* Compute the sha1 of string at 's' with 'len' bytes long.
+ * The SHA1 is then xored againt the string pointed by digest.
+ * Since xor is commutative, this operation is used in order to
+ * "add" digests relative to unordered elements.
+ *
+ * So digest(a,b,c,d) will be the same of digest(b,a,c,d) */
+static void xorDigest(unsigned char *digest, void *ptr, size_t len) {
+ SHA1_CTX ctx;
+ unsigned char hash[20], *s = ptr;
+ int j;
+
+ SHA1Init(&ctx);
+ SHA1Update(&ctx,s,len);
+ SHA1Final(hash,&ctx);
+
+ for (j = 0; j < 20; j++)
+ digest[j] ^= hash[j];
+}
+
+static void xorObjectDigest(unsigned char *digest, robj *o) {
+ o = getDecodedObject(o);
+ xorDigest(digest,o->ptr,sdslen(o->ptr));
+ decrRefCount(o);
+}
+
+/* This function instead of just computing the SHA1 and xoring it
+ * against diget, also perform the digest of "digest" itself and
+ * replace the old value with the new one.
+ *
+ * So the final digest will be:
+ *
+ * digest = SHA1(digest xor SHA1(data))
+ *
+ * This function is used every time we want to preserve the order so
+ * that digest(a,b,c,d) will be different than digest(b,c,d,a)
+ *
+ * Also note that mixdigest("foo") followed by mixdigest("bar")
+ * will lead to a different digest compared to "fo", "obar".
+ */
+static void mixDigest(unsigned char *digest, void *ptr, size_t len) {
+ SHA1_CTX ctx;
+ char *s = ptr;
+
+ xorDigest(digest,s,len);
+ SHA1Init(&ctx);
+ SHA1Update(&ctx,digest,20);
+ SHA1Final(digest,&ctx);
+}
+
+static void mixObjectDigest(unsigned char *digest, robj *o) {
+ o = getDecodedObject(o);
+ mixDigest(digest,o->ptr,sdslen(o->ptr));
+ decrRefCount(o);
+}
+
+/* Compute the dataset digest. Since keys, sets elements, hashes elements
+ * are not ordered, we use a trick: every aggregate digest is the xor
+ * of the digests of their elements. This way the order will not change
+ * the result. For list instead we use a feedback entering the output digest
+ * as input in order to ensure that a different ordered list will result in
+ * a different digest. */
+static void computeDatasetDigest(unsigned char *final) {
+ unsigned char digest[20];
+ char buf[128];
+ dictIterator *di = NULL;
+ dictEntry *de;
+ int j;
+ uint32_t aux;
+
+ memset(final,0,20); /* Start with a clean result */
+
+ for (j = 0; j < server.dbnum; j++) {
+ redisDb *db = server.db+j;
+
+ if (dictSize(db->dict) == 0) continue;
+ di = dictGetIterator(db->dict);
+
+ /* hash the DB id, so the same dataset moved in a different
+ * DB will lead to a different digest */
+ aux = htonl(j);
+ mixDigest(final,&aux,sizeof(aux));
+
+ /* Iterate this DB writing every entry */
+ while((de = dictNext(di)) != NULL) {
+ robj *key, *o, *kcopy;
+ time_t expiretime;
+
+ memset(digest,0,20); /* This key-val digest */
+ key = dictGetEntryKey(de);
+
+ if (!server.vm_enabled) {
+ mixObjectDigest(digest,key);
+ o = dictGetEntryVal(de);
+ } else {
+ /* Don't work with the key directly as when VM is active
+ * this is unsafe: TODO: fix decrRefCount to check if the
+ * count really reached 0 to avoid this mess */
+ kcopy = dupStringObject(key);
+ mixObjectDigest(digest,kcopy);
+ o = lookupKeyRead(db,kcopy);
+ decrRefCount(kcopy);
+ }
+ aux = htonl(o->type);
+ mixDigest(digest,&aux,sizeof(aux));
+ expiretime = getExpire(db,key);
+
+ /* Save the key and associated value */
+ if (o->type == REDIS_STRING) {
+ mixObjectDigest(digest,o);
+ } else if (o->type == REDIS_LIST) {
+ list *list = o->ptr;
+ listNode *ln;
+ listIter li;
+
+ listRewind(list,&li);
+ while((ln = listNext(&li))) {
+ robj *eleobj = listNodeValue(ln);
+
+ mixObjectDigest(digest,eleobj);
+ }
+ } else if (o->type == REDIS_SET) {
+ dict *set = o->ptr;
+ dictIterator *di = dictGetIterator(set);
+ dictEntry *de;
+
+ while((de = dictNext(di)) != NULL) {
+ robj *eleobj = dictGetEntryKey(de);
+
+ xorObjectDigest(digest,eleobj);
+ }
+ dictReleaseIterator(di);
+ } else if (o->type == REDIS_ZSET) {
+ zset *zs = o->ptr;
+ dictIterator *di = dictGetIterator(zs->dict);
+ dictEntry *de;
+
+ while((de = dictNext(di)) != NULL) {
+ robj *eleobj = dictGetEntryKey(de);
+ double *score = dictGetEntryVal(de);
+ unsigned char eledigest[20];
+
+ snprintf(buf,sizeof(buf),"%.17g",*score);
+ memset(eledigest,0,20);
+ mixObjectDigest(eledigest,eleobj);
+ mixDigest(eledigest,buf,strlen(buf));
+ xorDigest(digest,eledigest,20);
+ }
+ dictReleaseIterator(di);
+ } else if (o->type == REDIS_HASH) {
+ hashIterator *hi;
+ robj *obj;
+
+ hi = hashInitIterator(o);
+ while (hashNext(hi) != REDIS_ERR) {
+ unsigned char eledigest[20];
+
+ memset(eledigest,0,20);
+ obj = hashCurrent(hi,REDIS_HASH_KEY);
+ mixObjectDigest(eledigest,obj);
+ decrRefCount(obj);
+ obj = hashCurrent(hi,REDIS_HASH_VALUE);
+ mixObjectDigest(eledigest,obj);
+ decrRefCount(obj);
+ xorDigest(digest,eledigest,20);
+ }
+ hashReleaseIterator(hi);
+ } else {
+ redisPanic("Unknown object type");
+ }
+ /* If the key has an expire, add it to the mix */
+ if (expiretime != -1) xorDigest(digest,"!!expire!!",10);
+ /* We can finally xor the key-val digest to the final digest */
+ xorDigest(final,digest,20);
+ }
+ dictReleaseIterator(di);
+ }
+}
+
static void debugCommand(redisClient *c) {
if (!strcasecmp(c->argv[1]->ptr,"segfault")) {
*((char*)-1) = 'x';
dictAdd(c->db->dict,key,val);
}
addReply(c,shared.ok);
+ } else if (!strcasecmp(c->argv[1]->ptr,"digest") && c->argc == 2) {
+ unsigned char digest[20];
+ sds d = sdsnew("+");
+ int j;
+
+ computeDatasetDigest(digest);
+ for (j = 0; j < 20; j++)
+ d = sdscatprintf(d, "%02x",digest[j]);
+
+ d = sdscatlen(d,"\r\n",2);
+ addReplySds(c,d);
} else {
addReplySds(c,sdsnew(
"-ERR Syntax error, try DEBUG [SEGFAULT|OBJECT <key>|SWAPIN <key>|SWAPOUT <key>|RELOAD]\r\n"));
static void _redisAssert(char *estr, char *file, int line) {
redisLog(REDIS_WARNING,"=== ASSERTION FAILED ===");
- redisLog(REDIS_WARNING,"==> %s:%d '%s' is not true\n",file,line,estr);
+ redisLog(REDIS_WARNING,"==> %s:%d '%s' is not true",file,line,estr);
#ifdef HAVE_BACKTRACE
redisLog(REDIS_WARNING,"(forcing SIGSEGV in order to print the stack trace)");
*((char*)-1) = 'x';
_exit(0);
}
+static void sigtermHandler(int sig) {
+ REDIS_NOTUSED(sig);
+
+ redisLog(REDIS_WARNING,"SIGTERM received, scheduling shutting down...");
+ server.shutdown_asap = 1;
+}
+
static void setupSigSegvAction(void) {
struct sigaction act;
sigaction (SIGFPE, &act, NULL);
sigaction (SIGILL, &act, NULL);
sigaction (SIGBUS, &act, NULL);
+
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
+ act.sa_handler = sigtermHandler;
+ sigaction (SIGTERM, &act, NULL);
return;
}
projects / redis.git / blobdiff