* POSSIBILITY OF SUCH DAMAGE.
*/
-#define REDIS_VERSION "0.08"
+#define REDIS_VERSION "1.050"
+
+#include "fmacros.h"
+#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
+#define __USE_POSIX199309
#include <signal.h>
+
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+#include <ucontext.h>
+#endif /* HAVE_BACKTRACE */
+
#include <sys/wait.h>
#include <errno.h>
#include <assert.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/resource.h>
+#include <limits.h>
+#include "redis.h"
#include "ae.h" /* Event driven programming library */
#include "sds.h" /* Dynamic safe strings */
#include "anet.h" /* Networking the easy way */
#include "dict.h" /* Hash tables */
#include "adlist.h" /* Linked lists */
#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 */
/* Error codes */
#define REDIS_OK 0
/* Static server configuration */
#define REDIS_SERVERPORT 6379 /* TCP port */
#define REDIS_MAXIDLETIME (60*5) /* default client timeout */
-#define REDIS_QUERYBUF_LEN 1024
+#define REDIS_IOBUF_LEN 1024
#define REDIS_LOADBUF_LEN 1024
-#define REDIS_MAX_ARGS 16
+#define REDIS_STATIC_ARGS 4
#define REDIS_DEFAULT_DBNUM 16
#define REDIS_CONFIGLINE_MAX 1024
#define REDIS_OBJFREELIST_MAX 1000000 /* Max number of objects to cache */
#define REDIS_MAX_SYNC_TIME 60 /* Slave can't take more to sync */
+#define REDIS_EXPIRELOOKUPS_PER_CRON 100 /* try to expire 100 keys/second */
+#define REDIS_MAX_WRITE_PER_EVENT (1024*64)
+#define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
/* Hash table parameters */
#define REDIS_HT_MINFILL 10 /* Minimal hash table fill 10% */
-#define REDIS_HT_MINSLOTS 16384 /* Never resize the HT under this */
/* Command flags */
-#define REDIS_CMD_BULK 1
-#define REDIS_CMD_INLINE 2
+#define REDIS_CMD_BULK 1 /* Bulk write command */
+#define REDIS_CMD_INLINE 2 /* Inline command */
+/* REDIS_CMD_DENYOOM reserves a longer comment: all the commands marked with
+ this flags will return an error when the 'maxmemory' option is set in the
+ config file and the server is using more than maxmemory bytes of memory.
+ In short this commands are denied on low memory conditions. */
+#define REDIS_CMD_DENYOOM 4
/* Object types */
#define REDIS_STRING 0
#define REDIS_LIST 1
#define REDIS_SET 2
-#define REDIS_HASH 3
+#define REDIS_ZSET 3
+#define REDIS_HASH 4
+
+/* Objects encoding */
+#define REDIS_ENCODING_RAW 0 /* Raw representation */
+#define REDIS_ENCODING_INT 1 /* Encoded as integer */
+
+/* Object types only used for dumping to disk */
+#define REDIS_EXPIRETIME 253
#define REDIS_SELECTDB 254
#define REDIS_EOF 255
+/* Defines related to the dump file format. To store 32 bits lengths for short
+ * keys requires a lot of space, so we check the most significant 2 bits of
+ * the first byte to interpreter the length:
+ *
+ * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
+ * 01|000000 00000000 => 01, the len is 14 byes, 6 bits + 8 bits of next byte
+ * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
+ * 11|000000 this means: specially encoded object will follow. The six bits
+ * number specify the kind of object that follows.
+ * See the REDIS_RDB_ENC_* defines.
+ *
+ * Lenghts up to 63 are stored using a single byte, most DB keys, and may
+ * values, will fit inside. */
+#define REDIS_RDB_6BITLEN 0
+#define REDIS_RDB_14BITLEN 1
+#define REDIS_RDB_32BITLEN 2
+#define REDIS_RDB_ENCVAL 3
+#define REDIS_RDB_LENERR UINT_MAX
+
+/* When a length of a string object stored on disk has the first two bits
+ * set, the remaining two bits specify a special encoding for the object
+ * accordingly to the following defines: */
+#define REDIS_RDB_ENC_INT8 0 /* 8 bit signed integer */
+#define REDIS_RDB_ENC_INT16 1 /* 16 bit signed integer */
+#define REDIS_RDB_ENC_INT32 2 /* 32 bit signed integer */
+#define REDIS_RDB_ENC_LZF 3 /* string compressed with FASTLZ */
+
/* Client flags */
#define REDIS_CLOSE 1 /* This client connection should be closed ASAP */
#define REDIS_SLAVE 2 /* This client is a slave server */
#define REDIS_MASTER 4 /* This client is a master server */
#define REDIS_MONITOR 8 /* This client is a slave monitor, see MONITOR */
-/* Server replication state */
+/* Slave replication state - slave side */
#define REDIS_REPL_NONE 0 /* No active replication */
#define REDIS_REPL_CONNECT 1 /* Must connect to master */
#define REDIS_REPL_CONNECTED 2 /* Connected to master */
+/* Slave replication state - from the point of view of master
+ * Note that in SEND_BULK and ONLINE state the slave receives new updates
+ * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
+ * to start the next background saving in order to send updates to it. */
+#define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
+#define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
+#define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
+#define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
+
/* List related stuff */
#define REDIS_HEAD 0
#define REDIS_TAIL 1
/* Anti-warning macro... */
#define REDIS_NOTUSED(V) ((void) V)
+#define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
+#define ZSKIPLIST_P 0.25 /* Skiplist P = 1/4 */
+
/*================================= Data types ============================== */
/* A redis object, that is a type able to hold a string / list / set */
typedef struct redisObject {
- int type;
void *ptr;
+ unsigned char type;
+ unsigned char encoding;
+ unsigned char notused[2];
int refcount;
} robj;
+typedef struct redisDb {
+ dict *dict;
+ dict *expires;
+ int id;
+} redisDb;
+
/* With multiplexing we need to take per-clinet state.
* Clients are taken in a liked list. */
typedef struct redisClient {
int fd;
- dict *dict;
+ redisDb *db;
int dictid;
sds querybuf;
- robj *argv[REDIS_MAX_ARGS];
- int argc;
- int bulklen; /* bulk read len. -1 if not in bulk read mode */
+ robj **argv, **mbargv;
+ int argc, mbargc;
+ int bulklen; /* bulk read len. -1 if not in bulk read mode */
+ int multibulk; /* multi bulk command format active */
list *reply;
int sentlen;
time_t lastinteraction; /* time of the last interaction, used for timeout */
- int flags; /* REDIS_CLOSE | REDIS_SLAVE | REDIS_MONITOR */
- int slaveseldb; /* slave selected db, if this client is a slave */
+ int flags; /* REDIS_CLOSE | REDIS_SLAVE | REDIS_MONITOR */
+ int slaveseldb; /* slave selected db, if this client is a slave */
+ int authenticated; /* when requirepass is non-NULL */
+ int replstate; /* replication state if this is a slave */
+ int repldbfd; /* replication DB file descriptor */
+ long repldboff; /* replication DB file offset */
+ off_t repldbsize; /* replication DB file size */
} redisClient;
struct saveparam {
struct redisServer {
int port;
int fd;
- dict **dict;
+ redisDb *db;
+ dict *sharingpool;
+ unsigned int sharingpoolsize;
long long dirty; /* changes to DB from the last save */
list *clients;
list *slaves, *monitors;
int cronloops; /* number of times the cron function run */
list *objfreelist; /* A list of freed objects to avoid malloc() */
time_t lastsave; /* Unix time of last save succeeede */
- int usedmemory; /* Used memory in megabytes */
+ size_t usedmemory; /* Used memory in megabytes */
/* Fields used only for stats */
time_t stat_starttime; /* server start time */
long long stat_numcommands; /* number of processed commands */
int daemonize;
char *pidfile;
int bgsaveinprogress;
+ pid_t bgsavechildpid;
struct saveparam *saveparams;
int saveparamslen;
char *logfile;
char *bindaddr;
char *dbfilename;
+ char *requirepass;
+ int shareobjects;
/* Replication related */
int isslave;
char *masterhost;
int masterport;
- redisClient *master;
+ redisClient *master; /* client that is master for this slave */
int replstate;
+ unsigned int maxclients;
+ unsigned long maxmemory;
/* Sort parameters - qsort_r() is only available under BSD so we
* have to take this state global, in order to pass it to sortCompare() */
int sort_desc;
int flags;
};
+struct redisFunctionSym {
+ char *name;
+ unsigned long pointer;
+};
+
typedef struct _redisSortObject {
robj *obj;
union {
robj *pattern;
} redisSortOperation;
+/* ZSETs use a specialized version of Skiplists */
+
+typedef struct zskiplistNode {
+ struct zskiplistNode **forward;
+ double score;
+ robj *obj;
+} zskiplistNode;
+
+typedef struct zskiplist {
+ struct zskiplistNode *header;
+ long length;
+ int level;
+} zskiplist;
+
+typedef struct zset {
+ dict *dict;
+ zskiplist *zsl;
+} zset;
+
+/* Our shared "common" objects */
+
struct sharedObjectsStruct {
robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *pong, *space,
*colon, *nullbulk, *nullmultibulk,
static void decrRefCount(void *o);
static robj *createObject(int type, void *ptr);
static void freeClient(redisClient *c);
-static int loadDb(char *filename);
+static int rdbLoad(char *filename);
static void addReply(redisClient *c, robj *obj);
static void addReplySds(redisClient *c, sds s);
static void incrRefCount(robj *o);
-static int saveDbBackground(char *filename);
+static int rdbSaveBackground(char *filename);
static robj *createStringObject(char *ptr, size_t len);
static void replicationFeedSlaves(list *slaves, struct redisCommand *cmd, int dictid, robj **argv, int argc);
static int syncWithMaster(void);
-
+static robj *tryObjectSharing(robj *o);
+static int tryObjectEncoding(robj *o);
+static robj *getDecodedObject(const robj *o);
+static int removeExpire(redisDb *db, robj *key);
+static int expireIfNeeded(redisDb *db, robj *key);
+static int deleteIfVolatile(redisDb *db, robj *key);
+static int deleteKey(redisDb *db, robj *key);
+static time_t getExpire(redisDb *db, robj *key);
+static int setExpire(redisDb *db, robj *key, time_t when);
+static void updateSlavesWaitingBgsave(int bgsaveerr);
+static void freeMemoryIfNeeded(void);
+static int processCommand(redisClient *c);
+static void setupSigSegvAction(void);
+static void rdbRemoveTempFile(pid_t childpid);
+static size_t stringObjectLen(robj *o);
+static void processInputBuffer(redisClient *c);
+static zskiplist *zslCreate(void);
+static void zslFree(zskiplist *zsl);
+
+static void authCommand(redisClient *c);
static void pingCommand(redisClient *c);
static void echoCommand(redisClient *c);
static void setCommand(redisClient *c);
static void lsetCommand(redisClient *c);
static void saddCommand(redisClient *c);
static void sremCommand(redisClient *c);
+static void smoveCommand(redisClient *c);
static void sismemberCommand(redisClient *c);
static void scardCommand(redisClient *c);
+static void spopCommand(redisClient *c);
+static void srandmemberCommand(redisClient *c);
static void sinterCommand(redisClient *c);
static void sinterstoreCommand(redisClient *c);
+static void sunionCommand(redisClient *c);
+static void sunionstoreCommand(redisClient *c);
+static void sdiffCommand(redisClient *c);
+static void sdiffstoreCommand(redisClient *c);
static void syncCommand(redisClient *c);
static void flushdbCommand(redisClient *c);
static void flushallCommand(redisClient *c);
static void infoCommand(redisClient *c);
static void mgetCommand(redisClient *c);
static void monitorCommand(redisClient *c);
+static void expireCommand(redisClient *c);
+static void getsetCommand(redisClient *c);
+static void ttlCommand(redisClient *c);
+static void slaveofCommand(redisClient *c);
+static void debugCommand(redisClient *c);
+static void msetCommand(redisClient *c);
+static void msetnxCommand(redisClient *c);
+static void zaddCommand(redisClient *c);
/*================================= Globals ================================= */
static struct redisServer server; /* server global state */
static struct redisCommand cmdTable[] = {
{"get",getCommand,2,REDIS_CMD_INLINE},
- {"set",setCommand,3,REDIS_CMD_BULK},
- {"setnx",setnxCommand,3,REDIS_CMD_BULK},
- {"del",delCommand,2,REDIS_CMD_INLINE},
+ {"set",setCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"setnx",setnxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"del",delCommand,-2,REDIS_CMD_INLINE},
{"exists",existsCommand,2,REDIS_CMD_INLINE},
- {"incr",incrCommand,2,REDIS_CMD_INLINE},
- {"decr",decrCommand,2,REDIS_CMD_INLINE},
+ {"incr",incrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"decr",decrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
{"mget",mgetCommand,-2,REDIS_CMD_INLINE},
- {"rpush",rpushCommand,3,REDIS_CMD_BULK},
- {"lpush",lpushCommand,3,REDIS_CMD_BULK},
+ {"rpush",rpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"lpush",lpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"rpop",rpopCommand,2,REDIS_CMD_INLINE},
{"lpop",lpopCommand,2,REDIS_CMD_INLINE},
{"llen",llenCommand,2,REDIS_CMD_INLINE},
{"lindex",lindexCommand,3,REDIS_CMD_INLINE},
- {"lset",lsetCommand,4,REDIS_CMD_BULK},
+ {"lset",lsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"lrange",lrangeCommand,4,REDIS_CMD_INLINE},
{"ltrim",ltrimCommand,4,REDIS_CMD_INLINE},
{"lrem",lremCommand,4,REDIS_CMD_BULK},
- {"sadd",saddCommand,3,REDIS_CMD_BULK},
+ {"sadd",saddCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"srem",sremCommand,3,REDIS_CMD_BULK},
+ {"smove",smoveCommand,4,REDIS_CMD_BULK},
{"sismember",sismemberCommand,3,REDIS_CMD_BULK},
{"scard",scardCommand,2,REDIS_CMD_INLINE},
- {"sinter",sinterCommand,-2,REDIS_CMD_INLINE},
- {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_INLINE},
+ {"spop",spopCommand,2,REDIS_CMD_INLINE},
+ {"srandmember",srandmemberCommand,2,REDIS_CMD_INLINE},
+ {"sinter",sinterCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"sunion",sunionCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"sdiff",sdiffCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
{"smembers",sinterCommand,2,REDIS_CMD_INLINE},
- {"incrby",incrbyCommand,3,REDIS_CMD_INLINE},
- {"decrby",decrbyCommand,3,REDIS_CMD_INLINE},
+ {"zadd",zaddCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"incrby",incrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"decrby",decrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
+ {"getset",getsetCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"mset",msetCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
+ {"msetnx",msetnxCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
{"randomkey",randomkeyCommand,1,REDIS_CMD_INLINE},
{"select",selectCommand,2,REDIS_CMD_INLINE},
{"move",moveCommand,3,REDIS_CMD_INLINE},
{"rename",renameCommand,3,REDIS_CMD_INLINE},
{"renamenx",renamenxCommand,3,REDIS_CMD_INLINE},
+ {"expire",expireCommand,3,REDIS_CMD_INLINE},
{"keys",keysCommand,2,REDIS_CMD_INLINE},
{"dbsize",dbsizeCommand,1,REDIS_CMD_INLINE},
+ {"auth",authCommand,2,REDIS_CMD_INLINE},
{"ping",pingCommand,1,REDIS_CMD_INLINE},
{"echo",echoCommand,2,REDIS_CMD_BULK},
{"save",saveCommand,1,REDIS_CMD_INLINE},
{"sync",syncCommand,1,REDIS_CMD_INLINE},
{"flushdb",flushdbCommand,1,REDIS_CMD_INLINE},
{"flushall",flushallCommand,1,REDIS_CMD_INLINE},
- {"sort",sortCommand,-2,REDIS_CMD_INLINE},
+ {"sort",sortCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM},
{"info",infoCommand,1,REDIS_CMD_INLINE},
{"monitor",monitorCommand,1,REDIS_CMD_INLINE},
+ {"ttl",ttlCommand,2,REDIS_CMD_INLINE},
+ {"slaveof",slaveofCommand,3,REDIS_CMD_INLINE},
+ {"debug",debugCommand,-2,REDIS_CMD_INLINE},
{NULL,NULL,0,0}
};
-
/*============================ Utility functions ============================ */
/* Glob-style pattern matching. */
return 0;
}
-void redisLog(int level, const char *fmt, ...)
-{
+static void redisLog(int level, const char *fmt, ...) {
va_list ap;
FILE *fp;
va_start(ap, fmt);
if (level >= server.verbosity) {
char *c = ".-*";
- fprintf(fp,"%c ",c[level]);
+ char buf[64];
+ time_t now;
+
+ now = time(NULL);
+ strftime(buf,64,"%d %b %H:%M:%S",gmtime(&now));
+ fprintf(fp,"%s %c ",buf,c[level]);
vfprintf(fp, fmt, ap);
fprintf(fp,"\n");
fflush(fp);
* keys and radis objects as values (objects can hold SDS strings,
* lists, sets). */
+static void dictVanillaFree(void *privdata, void *val)
+{
+ DICT_NOTUSED(privdata);
+ zfree(val);
+}
+
static int sdsDictKeyCompare(void *privdata, const void *key1,
const void *key2)
{
decrRefCount(val);
}
-static int dictSdsKeyCompare(void *privdata, const void *key1,
+static int dictObjKeyCompare(void *privdata, const void *key1,
const void *key2)
{
const robj *o1 = key1, *o2 = key2;
return sdsDictKeyCompare(privdata,o1->ptr,o2->ptr);
}
-static unsigned int dictSdsHash(const void *key) {
+static unsigned int dictObjHash(const void *key) {
const robj *o = key;
return dictGenHashFunction(o->ptr, sdslen((sds)o->ptr));
}
+static int dictEncObjKeyCompare(void *privdata, const void *key1,
+ const void *key2)
+{
+ const robj *o1 = key1, *o2 = key2;
+
+ if (o1->encoding == REDIS_ENCODING_RAW &&
+ o2->encoding == REDIS_ENCODING_RAW)
+ return sdsDictKeyCompare(privdata,o1->ptr,o2->ptr);
+ else {
+ robj *dec1, *dec2;
+ int cmp;
+
+ dec1 = o1->encoding != REDIS_ENCODING_RAW ?
+ getDecodedObject(o1) : (robj*)o1;
+ dec2 = o2->encoding != REDIS_ENCODING_RAW ?
+ getDecodedObject(o2) : (robj*)o2;
+ cmp = sdsDictKeyCompare(privdata,dec1->ptr,dec2->ptr);
+ if (dec1 != o1) decrRefCount(dec1);
+ if (dec2 != o2) decrRefCount(dec2);
+ return cmp;
+ }
+}
+
+static unsigned int dictEncObjHash(const void *key) {
+ const robj *o = key;
+
+ if (o->encoding == REDIS_ENCODING_RAW)
+ return dictGenHashFunction(o->ptr, sdslen((sds)o->ptr));
+ else {
+ robj *dec = getDecodedObject(o);
+ unsigned int hash = dictGenHashFunction(dec->ptr, sdslen((sds)dec->ptr));
+ decrRefCount(dec);
+ return hash;
+ }
+}
+
static dictType setDictType = {
- dictSdsHash, /* hash function */
+ dictEncObjHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
- dictSdsKeyCompare, /* key compare */
+ dictEncObjKeyCompare, /* key compare */
dictRedisObjectDestructor, /* key destructor */
NULL /* val destructor */
};
+static dictType zsetDictType = {
+ dictEncObjHash, /* hash function */
+ NULL, /* key dup */
+ NULL, /* val dup */
+ dictEncObjKeyCompare, /* key compare */
+ dictRedisObjectDestructor, /* key destructor */
+ dictVanillaFree /* val destructor */
+};
+
static dictType hashDictType = {
- dictSdsHash, /* hash function */
+ dictObjHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
- dictSdsKeyCompare, /* key compare */
+ dictObjKeyCompare, /* key compare */
dictRedisObjectDestructor, /* key destructor */
dictRedisObjectDestructor /* val destructor */
};
}
/* ====================== Redis server networking stuff ===================== */
-void closeTimedoutClients(void) {
+static void closeTimedoutClients(void) {
redisClient *c;
- listIter *li;
listNode *ln;
time_t now = time(NULL);
- li = listGetIterator(server.clients,AL_START_HEAD);
- if (!li) return;
- while ((ln = listNextElement(li)) != NULL) {
+ listRewind(server.clients);
+ while ((ln = listYield(server.clients)) != NULL) {
c = listNodeValue(ln);
if (!(c->flags & REDIS_SLAVE) && /* no timeout for slaves */
+ !(c->flags & REDIS_MASTER) && /* no timeout for masters */
(now - c->lastinteraction > server.maxidletime)) {
redisLog(REDIS_DEBUG,"Closing idle client");
freeClient(c);
}
}
- listReleaseIterator(li);
}
-int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
- int j, size, used, loops = server.cronloops++;
+static int htNeedsResize(dict *dict) {
+ long long size, used;
+
+ size = dictSlots(dict);
+ used = dictSize(dict);
+ return (size && used && size > DICT_HT_INITIAL_SIZE &&
+ (used*100/size < REDIS_HT_MINFILL));
+}
+
+/* If the percentage of used slots in the HT reaches REDIS_HT_MINFILL
+ * we resize the hash table to save memory */
+static void tryResizeHashTables(void) {
+ int j;
+
+ for (j = 0; j < server.dbnum; j++) {
+ if (htNeedsResize(server.db[j].dict)) {
+ redisLog(REDIS_DEBUG,"The hash table %d is too sparse, resize it...",j);
+ dictResize(server.db[j].dict);
+ redisLog(REDIS_DEBUG,"Hash table %d resized.",j);
+ }
+ if (htNeedsResize(server.db[j].expires))
+ dictResize(server.db[j].expires);
+ }
+}
+
+static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
+ int j, loops = server.cronloops++;
REDIS_NOTUSED(eventLoop);
REDIS_NOTUSED(id);
REDIS_NOTUSED(clientData);
/* Update the global state with the amount of used memory */
server.usedmemory = zmalloc_used_memory();
- /* If the percentage of used slots in the HT reaches REDIS_HT_MINFILL
- * we resize the hash table to save memory */
+ /* Show some info about non-empty databases */
for (j = 0; j < server.dbnum; j++) {
- size = dictGetHashTableSize(server.dict[j]);
- used = dictGetHashTableUsed(server.dict[j]);
- if (!(loops % 5) && used > 0) {
- redisLog(REDIS_DEBUG,"DB %d: %d keys in %d slots HT.",j,used,size);
- // dictPrintStats(server.dict);
- }
- if (size && used && size > REDIS_HT_MINSLOTS &&
- (used*100/size < REDIS_HT_MINFILL)) {
- redisLog(REDIS_NOTICE,"The hash table %d is too sparse, resize it...",j);
- dictResize(server.dict[j]);
- redisLog(REDIS_NOTICE,"Hash table %d resized.",j);
+ long long size, used, vkeys;
+
+ size = dictSlots(server.db[j].dict);
+ used = dictSize(server.db[j].dict);
+ vkeys = dictSize(server.db[j].expires);
+ if (!(loops % 5) && (used || vkeys)) {
+ redisLog(REDIS_DEBUG,"DB %d: %lld keys (%lld volatile) in %lld slots HT.",j,used,vkeys,size);
+ /* dictPrintStats(server.dict); */
}
}
+ /* We don't want to resize the hash tables while a bacground saving
+ * is in progress: the saving child is created using fork() that is
+ * implemented with a copy-on-write semantic in most modern systems, so
+ * if we resize the HT while there is the saving child at work actually
+ * a lot of memory movements in the parent will cause a lot of pages
+ * copied. */
+ if (!server.bgsaveinprogress) tryResizeHashTables();
+
/* Show information about connected clients */
if (!(loops % 5)) {
- redisLog(REDIS_DEBUG,"%d clients connected (%d slaves), %d bytes in use",
+ redisLog(REDIS_DEBUG,"%d clients connected (%d slaves), %zu bytes in use, %d shared objects",
listLength(server.clients)-listLength(server.slaves),
listLength(server.slaves),
- server.usedmemory);
+ server.usedmemory,
+ dictSize(server.sharingpool));
}
/* Close connections of timedout clients */
- if (!(loops % 10))
+ if (server.maxidletime && !(loops % 10))
closeTimedoutClients();
/* Check if a background saving in progress terminated */
int statloc;
if (wait4(-1,&statloc,WNOHANG,NULL)) {
int exitcode = WEXITSTATUS(statloc);
- if (exitcode == 0) {
+ int bysignal = WIFSIGNALED(statloc);
+
+ if (!bysignal && exitcode == 0) {
redisLog(REDIS_NOTICE,
"Background saving terminated with success");
server.dirty = 0;
server.lastsave = time(NULL);
+ } else if (!bysignal && exitcode != 0) {
+ redisLog(REDIS_WARNING, "Background saving error");
} else {
redisLog(REDIS_WARNING,
- "Background saving error");
+ "Background saving terminated by signal");
+ rdbRemoveTempFile(server.bgsavechildpid);
}
server.bgsaveinprogress = 0;
+ server.bgsavechildpid = -1;
+ updateSlavesWaitingBgsave(exitcode == 0 ? REDIS_OK : REDIS_ERR);
}
} else {
/* If there is not a background saving in progress check if
now-server.lastsave > sp->seconds) {
redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
sp->changes, sp->seconds);
- saveDbBackground(server.dbfilename);
+ rdbSaveBackground(server.dbfilename);
break;
}
}
}
+
+ /* Try to expire a few timed out keys */
+ for (j = 0; j < server.dbnum; j++) {
+ redisDb *db = server.db+j;
+ int num = dictSize(db->expires);
+
+ if (num) {
+ time_t now = time(NULL);
+
+ if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
+ num = REDIS_EXPIRELOOKUPS_PER_CRON;
+ while (num--) {
+ dictEntry *de;
+ time_t t;
+
+ if ((de = dictGetRandomKey(db->expires)) == NULL) break;
+ t = (time_t) dictGetEntryVal(de);
+ if (now > t) {
+ deleteKey(db,dictGetEntryKey(de));
+ }
+ }
+ }
+ }
+
/* Check if we should connect to a MASTER */
if (server.replstate == REDIS_REPL_CONNECT) {
redisLog(REDIS_NOTICE,"Connecting to MASTER...");
static void appendServerSaveParams(time_t seconds, int changes) {
server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
- if (server.saveparams == NULL) oom("appendServerSaveParams");
server.saveparams[server.saveparamslen].seconds = seconds;
server.saveparams[server.saveparamslen].changes = changes;
server.saveparamslen++;
server.daemonize = 0;
server.pidfile = "/var/run/redis.pid";
server.dbfilename = "dump.rdb";
+ server.requirepass = NULL;
+ server.shareobjects = 0;
+ server.sharingpoolsize = 1024;
+ server.maxclients = 0;
+ server.maxmemory = 0;
ResetServerSaveParams();
appendServerSaveParams(60*60,1); /* save after 1 hour and 1 change */
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
+ setupSigSegvAction();
server.clients = listCreate();
server.slaves = listCreate();
server.objfreelist = listCreate();
createSharedObjects();
server.el = aeCreateEventLoop();
- server.dict = zmalloc(sizeof(dict*)*server.dbnum);
- if (!server.dict || !server.clients || !server.slaves || !server.monitors || !server.el || !server.objfreelist)
- oom("server initialization"); /* Fatal OOM */
+ server.db = zmalloc(sizeof(redisDb)*server.dbnum);
+ server.sharingpool = dictCreate(&setDictType,NULL);
server.fd = anetTcpServer(server.neterr, server.port, server.bindaddr);
if (server.fd == -1) {
redisLog(REDIS_WARNING, "Opening TCP port: %s", server.neterr);
exit(1);
}
for (j = 0; j < server.dbnum; j++) {
- server.dict[j] = dictCreate(&hashDictType,NULL);
- if (!server.dict[j])
- oom("dictCreate"); /* Fatal OOM */
+ server.db[j].dict = dictCreate(&hashDictType,NULL);
+ server.db[j].expires = dictCreate(&setDictType,NULL);
+ server.db[j].id = j;
}
server.cronloops = 0;
server.bgsaveinprogress = 0;
+ server.bgsavechildpid = -1;
server.lastsave = time(NULL);
server.dirty = 0;
server.usedmemory = 0;
}
/* Empty the whole database */
-static void emptyDb() {
+static long long emptyDb() {
int j;
+ long long removed = 0;
+
+ for (j = 0; j < server.dbnum; j++) {
+ removed += dictSize(server.db[j].dict);
+ dictEmpty(server.db[j].dict);
+ dictEmpty(server.db[j].expires);
+ }
+ return removed;
+}
- for (j = 0; j < server.dbnum; j++)
- dictEmpty(server.dict[j]);
+static int yesnotoi(char *s) {
+ if (!strcasecmp(s,"yes")) return 1;
+ else if (!strcasecmp(s,"no")) return 0;
+ else return -1;
}
/* I agree, this is a very rudimental way to load a configuration...
will improve later if the config gets more complex */
static void loadServerConfig(char *filename) {
- FILE *fp = fopen(filename,"r");
+ FILE *fp;
char buf[REDIS_CONFIGLINE_MAX+1], *err = NULL;
int linenum = 0;
sds line = NULL;
-
- if (!fp) {
- redisLog(REDIS_WARNING,"Fatal error, can't open config file");
- exit(1);
+
+ if (filename[0] == '-' && filename[1] == '\0')
+ fp = stdin;
+ else {
+ if ((fp = fopen(filename,"r")) == NULL) {
+ redisLog(REDIS_WARNING,"Fatal error, can't open config file");
+ exit(1);
+ }
}
+
while(fgets(buf,REDIS_CONFIGLINE_MAX+1,fp) != NULL) {
sds *argv;
int argc, j;
sdstolower(argv[0]);
/* Execute config directives */
- if (!strcmp(argv[0],"timeout") && argc == 2) {
+ if (!strcasecmp(argv[0],"timeout") && argc == 2) {
server.maxidletime = atoi(argv[1]);
- if (server.maxidletime < 1) {
+ if (server.maxidletime < 0) {
err = "Invalid timeout value"; goto loaderr;
}
- } else if (!strcmp(argv[0],"port") && argc == 2) {
+ } else if (!strcasecmp(argv[0],"port") && argc == 2) {
server.port = atoi(argv[1]);
if (server.port < 1 || server.port > 65535) {
err = "Invalid port"; goto loaderr;
}
- } else if (!strcmp(argv[0],"bind") && argc == 2) {
+ } else if (!strcasecmp(argv[0],"bind") && argc == 2) {
server.bindaddr = zstrdup(argv[1]);
- } else if (!strcmp(argv[0],"save") && argc == 3) {
+ } else if (!strcasecmp(argv[0],"save") && argc == 3) {
int seconds = atoi(argv[1]);
int changes = atoi(argv[2]);
if (seconds < 1 || changes < 0) {
err = "Invalid save parameters"; goto loaderr;
}
appendServerSaveParams(seconds,changes);
- } else if (!strcmp(argv[0],"dir") && argc == 2) {
+ } else if (!strcasecmp(argv[0],"dir") && argc == 2) {
if (chdir(argv[1]) == -1) {
redisLog(REDIS_WARNING,"Can't chdir to '%s': %s",
argv[1], strerror(errno));
exit(1);
}
- } else if (!strcmp(argv[0],"loglevel") && argc == 2) {
- if (!strcmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
- else if (!strcmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
- else if (!strcmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
+ } else if (!strcasecmp(argv[0],"loglevel") && argc == 2) {
+ if (!strcasecmp(argv[1],"debug")) server.verbosity = REDIS_DEBUG;
+ else if (!strcasecmp(argv[1],"notice")) server.verbosity = REDIS_NOTICE;
+ else if (!strcasecmp(argv[1],"warning")) server.verbosity = REDIS_WARNING;
else {
err = "Invalid log level. Must be one of debug, notice, warning";
goto loaderr;
}
- } else if (!strcmp(argv[0],"logfile") && argc == 2) {
- FILE *fp;
+ } else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
+ FILE *logfp;
server.logfile = zstrdup(argv[1]);
- if (!strcmp(server.logfile,"stdout")) {
+ if (!strcasecmp(server.logfile,"stdout")) {
zfree(server.logfile);
server.logfile = NULL;
}
if (server.logfile) {
/* Test if we are able to open the file. The server will not
* be able to abort just for this problem later... */
- fp = fopen(server.logfile,"a");
- if (fp == NULL) {
+ logfp = fopen(server.logfile,"a");
+ if (logfp == NULL) {
err = sdscatprintf(sdsempty(),
"Can't open the log file: %s", strerror(errno));
goto loaderr;
}
- fclose(fp);
+ fclose(logfp);
}
- } else if (!strcmp(argv[0],"databases") && argc == 2) {
+ } else if (!strcasecmp(argv[0],"databases") && argc == 2) {
server.dbnum = atoi(argv[1]);
if (server.dbnum < 1) {
err = "Invalid number of databases"; goto loaderr;
}
- } else if (!strcmp(argv[0],"slaveof") && argc == 3) {
+ } else if (!strcasecmp(argv[0],"maxclients") && argc == 2) {
+ server.maxclients = atoi(argv[1]);
+ } else if (!strcasecmp(argv[0],"maxmemory") && argc == 2) {
+ server.maxmemory = strtoll(argv[1], NULL, 10);
+ } else if (!strcasecmp(argv[0],"slaveof") && argc == 3) {
server.masterhost = sdsnew(argv[1]);
server.masterport = atoi(argv[2]);
server.replstate = REDIS_REPL_CONNECT;
- } else if (!strcmp(argv[0],"glueoutputbuf") && argc == 2) {
- sdstolower(argv[1]);
- if (!strcmp(argv[1],"yes")) server.glueoutputbuf = 1;
- else if (!strcmp(argv[1],"no")) server.glueoutputbuf = 0;
- else {
+ } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
+ if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
err = "argument must be 'yes' or 'no'"; goto loaderr;
}
- } else if (!strcmp(argv[0],"daemonize") && argc == 2) {
- sdstolower(argv[1]);
- if (!strcmp(argv[1],"yes")) server.daemonize = 1;
- else if (!strcmp(argv[1],"no")) server.daemonize = 0;
- else {
+ } else if (!strcasecmp(argv[0],"shareobjects") && argc == 2) {
+ if ((server.shareobjects = yesnotoi(argv[1])) == -1) {
+ err = "argument must be 'yes' or 'no'"; goto loaderr;
+ }
+ } else if (!strcasecmp(argv[0],"shareobjectspoolsize") && argc == 2) {
+ server.sharingpoolsize = atoi(argv[1]);
+ if (server.sharingpoolsize < 1) {
+ err = "invalid object sharing pool size"; goto loaderr;
+ }
+ } else if (!strcasecmp(argv[0],"daemonize") && argc == 2) {
+ if ((server.daemonize = yesnotoi(argv[1])) == -1) {
err = "argument must be 'yes' or 'no'"; goto loaderr;
}
- } else if (!strcmp(argv[0],"pidfile") && argc == 2) {
+ } else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
+ server.requirepass = zstrdup(argv[1]);
+ } else if (!strcasecmp(argv[0],"pidfile") && argc == 2) {
server.pidfile = zstrdup(argv[1]);
+ } else if (!strcasecmp(argv[0],"dbfilename") && argc == 2) {
+ server.dbfilename = zstrdup(argv[1]);
} else {
err = "Bad directive or wrong number of arguments"; goto loaderr;
}
zfree(argv);
sdsfree(line);
}
- fclose(fp);
+ if (fp != stdin) fclose(fp);
return;
loaderr:
for (j = 0; j < c->argc; j++)
decrRefCount(c->argv[j]);
+ for (j = 0; j < c->mbargc; j++)
+ decrRefCount(c->mbargv[j]);
c->argc = 0;
+ c->mbargc = 0;
}
static void freeClient(redisClient *c) {
assert(ln != NULL);
listDelNode(server.clients,ln);
if (c->flags & REDIS_SLAVE) {
+ if (c->replstate == REDIS_REPL_SEND_BULK && c->repldbfd != -1)
+ close(c->repldbfd);
list *l = (c->flags & REDIS_MONITOR) ? server.monitors : server.slaves;
ln = listSearchKey(l,c);
assert(ln != NULL);
server.master = NULL;
server.replstate = REDIS_REPL_CONNECT;
}
+ zfree(c->argv);
+ zfree(c->mbargv);
zfree(c);
}
static void glueReplyBuffersIfNeeded(redisClient *c) {
int totlen = 0;
- listNode *ln = c->reply->head, *next;
+ listNode *ln;
robj *o;
- while(ln) {
+ listRewind(c->reply);
+ while((ln = listYield(c->reply))) {
o = ln->value;
totlen += sdslen(o->ptr);
- ln = ln->next;
/* This optimization makes more sense if we don't have to copy
* too much data */
if (totlen > 1024) return;
char buf[1024];
int copylen = 0;
- ln = c->reply->head;
- while(ln) {
- next = ln->next;
+ listRewind(c->reply);
+ while((ln = listYield(c->reply))) {
o = ln->value;
memcpy(buf+copylen,o->ptr,sdslen(o->ptr));
copylen += sdslen(o->ptr);
listDelNode(c->reply,ln);
- ln = next;
}
/* Now the output buffer is empty, add the new single element */
- addReplySds(c,sdsnewlen(buf,totlen));
+ o = createObject(REDIS_STRING,sdsnewlen(buf,totlen));
+ listAddNodeTail(c->reply,o);
}
}
}
if (c->flags & REDIS_MASTER) {
+ /* Don't reply to a master */
nwritten = objlen - c->sentlen;
} else {
- nwritten = write(fd, o->ptr+c->sentlen, objlen - c->sentlen);
+ nwritten = write(fd, ((char*)o->ptr)+c->sentlen, objlen - c->sentlen);
if (nwritten <= 0) break;
}
c->sentlen += nwritten;
listDelNode(c->reply,listFirst(c->reply));
c->sentlen = 0;
}
+ /* Note that we avoid to send more thank REDIS_MAX_WRITE_PER_EVENT
+ * bytes, in a single threaded server it's a good idea to server
+ * other clients as well, even if a very large request comes from
+ * super fast link that is always able to accept data (in real world
+ * terms think to 'KEYS *' against the loopback interfae) */
+ if (totwritten > REDIS_MAX_WRITE_PER_EVENT) break;
}
if (nwritten == -1) {
if (errno == EAGAIN) {
static struct redisCommand *lookupCommand(char *name) {
int j = 0;
while(cmdTable[j].name != NULL) {
- if (!strcmp(name,cmdTable[j].name)) return &cmdTable[j];
+ if (!strcasecmp(name,cmdTable[j].name)) return &cmdTable[j];
j++;
}
return NULL;
static void resetClient(redisClient *c) {
freeClientArgv(c);
c->bulklen = -1;
+ c->multibulk = 0;
}
/* If this function gets called we already read a whole
struct redisCommand *cmd;
long long dirty;
- sdstolower(c->argv[0]->ptr);
+ /* Free some memory if needed (maxmemory setting) */
+ if (server.maxmemory) freeMemoryIfNeeded();
+
+ /* Handle the multi bulk command type. This is an alternative protocol
+ * supported by Redis in order to receive commands that are composed of
+ * multiple binary-safe "bulk" arguments. The latency of processing is
+ * a bit higher but this allows things like multi-sets, so if this
+ * protocol is used only for MSET and similar commands this is a big win. */
+ if (c->multibulk == 0 && c->argc == 1 && ((char*)(c->argv[0]->ptr))[0] == '*') {
+ c->multibulk = atoi(((char*)c->argv[0]->ptr)+1);
+ if (c->multibulk <= 0) {
+ resetClient(c);
+ return 1;
+ } else {
+ decrRefCount(c->argv[c->argc-1]);
+ c->argc--;
+ return 1;
+ }
+ } else if (c->multibulk) {
+ if (c->bulklen == -1) {
+ if (((char*)c->argv[0]->ptr)[0] != '$') {
+ addReplySds(c,sdsnew("-ERR multi bulk protocol error\r\n"));
+ resetClient(c);
+ return 1;
+ } else {
+ int bulklen = atoi(((char*)c->argv[0]->ptr)+1);
+ decrRefCount(c->argv[0]);
+ if (bulklen < 0 || bulklen > 1024*1024*1024) {
+ c->argc--;
+ addReplySds(c,sdsnew("-ERR invalid bulk write count\r\n"));
+ resetClient(c);
+ return 1;
+ }
+ c->argc--;
+ c->bulklen = bulklen+2; /* add two bytes for CR+LF */
+ return 1;
+ }
+ } else {
+ c->mbargv = zrealloc(c->mbargv,(sizeof(robj*))*(c->mbargc+1));
+ c->mbargv[c->mbargc] = c->argv[0];
+ c->mbargc++;
+ c->argc--;
+ c->multibulk--;
+ if (c->multibulk == 0) {
+ robj **auxargv;
+ int auxargc;
+
+ /* Here we need to swap the multi-bulk argc/argv with the
+ * normal argc/argv of the client structure. */
+ auxargv = c->argv;
+ c->argv = c->mbargv;
+ c->mbargv = auxargv;
+
+ auxargc = c->argc;
+ c->argc = c->mbargc;
+ c->mbargc = auxargc;
+
+ /* We need to set bulklen to something different than -1
+ * in order for the code below to process the command without
+ * to try to read the last argument of a bulk command as
+ * a special argument. */
+ c->bulklen = 0;
+ /* continue below and process the command */
+ } else {
+ c->bulklen = -1;
+ return 1;
+ }
+ }
+ }
+ /* -- end of multi bulk commands processing -- */
+
/* The QUIT command is handled as a special case. Normal command
* procs are unable to close the client connection safely */
- if (!strcmp(c->argv[0]->ptr,"quit")) {
+ if (!strcasecmp(c->argv[0]->ptr,"quit")) {
freeClient(c);
return 0;
}
addReplySds(c,sdsnew("-ERR wrong number of arguments\r\n"));
resetClient(c);
return 1;
+ } else if (server.maxmemory && cmd->flags & REDIS_CMD_DENYOOM && zmalloc_used_memory() > server.maxmemory) {
+ addReplySds(c,sdsnew("-ERR command not allowed when used memory > 'maxmemory'\r\n"));
+ resetClient(c);
+ return 1;
} else if (cmd->flags & REDIS_CMD_BULK && c->bulklen == -1) {
int bulklen = atoi(c->argv[c->argc-1]->ptr);
c->argc--;
c->bulklen = bulklen+2; /* add two bytes for CR+LF */
/* It is possible that the bulk read is already in the
- * buffer. Check this condition and handle it accordingly */
+ * buffer. Check this condition and handle it accordingly.
+ * This is just a fast path, alternative to call processInputBuffer().
+ * It's a good idea since the code is small and this condition
+ * happens most of the times. */
if ((signed)sdslen(c->querybuf) >= c->bulklen) {
c->argv[c->argc] = createStringObject(c->querybuf,c->bulklen-2);
c->argc++;
return 1;
}
}
+ /* Let's try to share objects on the command arguments vector */
+ if (server.shareobjects) {
+ int j;
+ for(j = 1; j < c->argc; j++)
+ c->argv[j] = tryObjectSharing(c->argv[j]);
+ }
+ /* Let's try to encode the bulk object to save space. */
+ if (cmd->flags & REDIS_CMD_BULK)
+ tryObjectEncoding(c->argv[c->argc-1]);
+
+ /* Check if the user is authenticated */
+ if (server.requirepass && !c->authenticated && cmd->proc != authCommand) {
+ addReplySds(c,sdsnew("-ERR operation not permitted\r\n"));
+ resetClient(c);
+ return 1;
+ }
+
/* Exec the command */
dirty = server.dirty;
cmd->proc(c);
if (server.dirty-dirty != 0 && listLength(server.slaves))
- replicationFeedSlaves(server.slaves,cmd,c->dictid,c->argv,c->argc);
+ replicationFeedSlaves(server.slaves,cmd,c->db->id,c->argv,c->argc);
if (listLength(server.monitors))
- replicationFeedSlaves(server.monitors,cmd,c->dictid,c->argv,c->argc);
+ replicationFeedSlaves(server.monitors,cmd,c->db->id,c->argv,c->argc);
server.stat_numcommands++;
/* Prepare the client for the next command */
}
static void replicationFeedSlaves(list *slaves, struct redisCommand *cmd, int dictid, robj **argv, int argc) {
- listNode *ln = slaves->head;
- robj *outv[REDIS_MAX_ARGS*4]; /* enough room for args, spaces, newlines */
+ listNode *ln;
int outc = 0, j;
+ robj **outv;
+ /* (args*2)+1 is enough room for args, spaces, newlines */
+ robj *static_outv[REDIS_STATIC_ARGS*2+1];
+
+ if (argc <= REDIS_STATIC_ARGS) {
+ outv = static_outv;
+ } else {
+ outv = zmalloc(sizeof(robj*)*(argc*2+1));
+ }
for (j = 0; j < argc; j++) {
if (j != 0) outv[outc++] = shared.space;
robj *lenobj;
lenobj = createObject(REDIS_STRING,
- sdscatprintf(sdsempty(),"%d\r\n",sdslen(argv[j]->ptr)));
+ sdscatprintf(sdsempty(),"%d\r\n",
+ stringObjectLen(argv[j])));
lenobj->refcount = 0;
outv[outc++] = lenobj;
}
}
outv[outc++] = shared.crlf;
- while(ln) {
+ /* Increment all the refcounts at start and decrement at end in order to
+ * be sure to free objects if there is no slave in a replication state
+ * able to be feed with commands */
+ for (j = 0; j < outc; j++) incrRefCount(outv[j]);
+ listRewind(slaves);
+ while((ln = listYield(slaves))) {
redisClient *slave = ln->value;
+
+ /* Don't feed slaves that are still waiting for BGSAVE to start */
+ if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_START) continue;
+
+ /* Feed all the other slaves, MONITORs and so on */
if (slave->slaveseldb != dictid) {
robj *selectcmd;
slave->slaveseldb = dictid;
}
for (j = 0; j < outc; j++) addReply(slave,outv[j]);
- ln = ln->next;
}
+ for (j = 0; j < outc; j++) decrRefCount(outv[j]);
+ if (outv != static_outv) zfree(outv);
}
-static void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) {
- redisClient *c = (redisClient*) privdata;
- char buf[REDIS_QUERYBUF_LEN];
- int nread;
- REDIS_NOTUSED(el);
- REDIS_NOTUSED(mask);
-
- nread = read(fd, buf, REDIS_QUERYBUF_LEN);
- if (nread == -1) {
- if (errno == EAGAIN) {
- nread = 0;
- } else {
- redisLog(REDIS_DEBUG, "Reading from client: %s",strerror(errno));
- freeClient(c);
- return;
- }
- } else if (nread == 0) {
- redisLog(REDIS_DEBUG, "Client closed connection");
- freeClient(c);
- return;
- }
- if (nread) {
- c->querybuf = sdscatlen(c->querybuf, buf, nread);
- c->lastinteraction = time(NULL);
- } else {
- return;
- }
-
+static void processInputBuffer(redisClient *c) {
again:
if (c->bulklen == -1) {
/* Read the first line of the query */
char *p = strchr(c->querybuf,'\n');
size_t querylen;
+
if (p) {
sds query, *argv;
int argc, j;
}
argv = sdssplitlen(query,sdslen(query)," ",1,&argc);
sdsfree(query);
- if (argv == NULL) oom("sdssplitlen");
- for (j = 0; j < argc && j < REDIS_MAX_ARGS; j++) {
+
+ if (c->argv) zfree(c->argv);
+ c->argv = zmalloc(sizeof(robj*)*argc);
+
+ for (j = 0; j < argc; j++) {
if (sdslen(argv[j])) {
c->argv[c->argc] = createObject(REDIS_STRING,argv[j]);
c->argc++;
/* Execute the command. If the client is still valid
* after processCommand() return and there is something
* on the query buffer try to process the next command. */
- if (processCommand(c) && sdslen(c->querybuf)) goto again;
+ if (c->argc && processCommand(c) && sdslen(c->querybuf)) goto again;
return;
- } else if (sdslen(c->querybuf) >= 1024) {
+ } else if (sdslen(c->querybuf) >= REDIS_REQUEST_MAX_SIZE) {
redisLog(REDIS_DEBUG, "Client protocol error");
freeClient(c);
return;
c->argv[c->argc] = createStringObject(c->querybuf,c->bulklen-2);
c->argc++;
c->querybuf = sdsrange(c->querybuf,c->bulklen,-1);
- processCommand(c);
+ /* Process the command. If the client is still valid after
+ * the processing and there is more data in the buffer
+ * try to parse it. */
+ if (processCommand(c) && sdslen(c->querybuf)) goto again;
+ return;
+ }
+ }
+}
+
+static void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) {
+ redisClient *c = (redisClient*) privdata;
+ char buf[REDIS_IOBUF_LEN];
+ int nread;
+ REDIS_NOTUSED(el);
+ REDIS_NOTUSED(mask);
+
+ nread = read(fd, buf, REDIS_IOBUF_LEN);
+ if (nread == -1) {
+ if (errno == EAGAIN) {
+ nread = 0;
+ } else {
+ redisLog(REDIS_DEBUG, "Reading from client: %s",strerror(errno));
+ freeClient(c);
return;
}
+ } else if (nread == 0) {
+ redisLog(REDIS_DEBUG, "Client closed connection");
+ freeClient(c);
+ return;
+ }
+ if (nread) {
+ c->querybuf = sdscatlen(c->querybuf, buf, nread);
+ c->lastinteraction = time(NULL);
+ } else {
+ return;
}
+ processInputBuffer(c);
}
static int selectDb(redisClient *c, int id) {
if (id < 0 || id >= server.dbnum)
return REDIS_ERR;
- c->dict = server.dict[id];
- c->dictid = id;
+ c->db = &server.db[id];
return REDIS_OK;
}
+static void *dupClientReplyValue(void *o) {
+ incrRefCount((robj*)o);
+ return 0;
+}
+
static redisClient *createClient(int fd) {
redisClient *c = zmalloc(sizeof(*c));
c->fd = fd;
c->querybuf = sdsempty();
c->argc = 0;
+ c->argv = NULL;
c->bulklen = -1;
+ c->multibulk = 0;
+ c->mbargc = 0;
+ c->mbargv = NULL;
c->sentlen = 0;
c->flags = 0;
c->lastinteraction = time(NULL);
- if ((c->reply = listCreate()) == NULL) oom("listCreate");
+ c->authenticated = 0;
+ c->replstate = REDIS_REPL_NONE;
+ c->reply = listCreate();
listSetFreeMethod(c->reply,decrRefCount);
+ listSetDupMethod(c->reply,dupClientReplyValue);
if (aeCreateFileEvent(server.el, c->fd, AE_READABLE,
readQueryFromClient, c, NULL) == AE_ERR) {
freeClient(c);
return NULL;
}
- if (!listAddNodeTail(server.clients,c)) oom("listAddNodeTail");
+ listAddNodeTail(server.clients,c);
return c;
}
static void addReply(redisClient *c, robj *obj) {
if (listLength(c->reply) == 0 &&
+ (c->replstate == REDIS_REPL_NONE ||
+ c->replstate == REDIS_REPL_ONLINE) &&
aeCreateFileEvent(server.el, c->fd, AE_WRITABLE,
sendReplyToClient, c, NULL) == AE_ERR) return;
- if (!listAddNodeTail(c->reply,obj)) oom("listAddNodeTail");
- incrRefCount(obj);
+ if (obj->encoding != REDIS_ENCODING_RAW) {
+ obj = getDecodedObject(obj);
+ } else {
+ incrRefCount(obj);
+ }
+ listAddNodeTail(c->reply,obj);
}
static void addReplySds(redisClient *c, sds s) {
decrRefCount(o);
}
+static void addReplyBulkLen(redisClient *c, robj *obj) {
+ size_t len;
+
+ if (obj->encoding == REDIS_ENCODING_RAW) {
+ len = sdslen(obj->ptr);
+ } else {
+ long n = (long)obj->ptr;
+
+ len = 1;
+ if (n < 0) {
+ len++;
+ n = -n;
+ }
+ while((n = n/10) != 0) {
+ len++;
+ }
+ }
+ addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",len));
+}
+
static void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
int cport, cfd;
char cip[128];
+ redisClient *c;
REDIS_NOTUSED(el);
REDIS_NOTUSED(mask);
REDIS_NOTUSED(privdata);
return;
}
redisLog(REDIS_DEBUG,"Accepted %s:%d", cip, cport);
- if (createClient(cfd) == NULL) {
+ if ((c = createClient(cfd)) == NULL) {
redisLog(REDIS_WARNING,"Error allocating resoures for the client");
close(cfd); /* May be already closed, just ingore errors */
return;
}
+ /* If maxclient directive is set and this is one client more... close the
+ * connection. Note that we create the client instead to check before
+ * for this condition, since now the socket is already set in nonblocking
+ * mode and we can send an error for free using the Kernel I/O */
+ if (server.maxclients && listLength(server.clients) > server.maxclients) {
+ char *err = "-ERR max number of clients reached\r\n";
+
+ /* That's a best effort error message, don't check write errors */
+ (void) write(c->fd,err,strlen(err));
+ freeClient(c);
+ return;
+ }
server.stat_numconnections++;
}
} else {
o = zmalloc(sizeof(*o));
}
- if (!o) oom("createObject");
o->type = type;
+ o->encoding = REDIS_ENCODING_RAW;
o->ptr = ptr;
o->refcount = 1;
return o;
static robj *createListObject(void) {
list *l = listCreate();
- if (!l) oom("listCreate");
listSetFreeMethod(l,decrRefCount);
return createObject(REDIS_LIST,l);
}
static robj *createSetObject(void) {
dict *d = dictCreate(&setDictType,NULL);
- if (!d) oom("dictCreate");
return createObject(REDIS_SET,d);
}
-#if 0
-static robj *createHashObject(void) {
- dict *d = dictCreate(&hashDictType,NULL);
- if (!d) oom("dictCreate");
- return createObject(REDIS_SET,d);
+static robj *createZsetObject(void) {
+ zset *zs = zmalloc(sizeof(*zs));
+
+ zs->dict = dictCreate(&zsetDictType,NULL);
+ zs->zsl = zslCreate();
+ return createObject(REDIS_ZSET,zs);
}
-#endif
static void freeStringObject(robj *o) {
- sdsfree(o->ptr);
+ if (o->encoding == REDIS_ENCODING_RAW) {
+ sdsfree(o->ptr);
+ }
}
static void freeListObject(robj *o) {
dictRelease((dict*) o->ptr);
}
+static void freeZsetObject(robj *o) {
+ zset *zs = o->ptr;
+
+ dictRelease(zs->dict);
+ zslFree(zs->zsl);
+ zfree(zs);
+}
+
static void freeHashObject(robj *o) {
dictRelease((dict*) o->ptr);
}
static void incrRefCount(robj *o) {
o->refcount++;
+#ifdef DEBUG_REFCOUNT
+ if (o->type == REDIS_STRING)
+ printf("Increment '%s'(%p), now is: %d\n",o->ptr,o,o->refcount);
+#endif
}
static void decrRefCount(void *obj) {
robj *o = obj;
+
+#ifdef DEBUG_REFCOUNT
+ if (o->type == REDIS_STRING)
+ printf("Decrement '%s'(%p), now is: %d\n",o->ptr,o,o->refcount-1);
+#endif
if (--(o->refcount) == 0) {
switch(o->type) {
case REDIS_STRING: freeStringObject(o); break;
case REDIS_LIST: freeListObject(o); break;
case REDIS_SET: freeSetObject(o); break;
+ case REDIS_ZSET: freeZsetObject(o); break;
case REDIS_HASH: freeHashObject(o); break;
default: assert(0 != 0); break;
}
}
}
-/*============================ DB saving/loading ============================ */
+static robj *lookupKey(redisDb *db, robj *key) {
+ dictEntry *de = dictFind(db->dict,key);
+ return de ? dictGetEntryVal(de) : NULL;
+}
-/* Save the DB on disk. Return REDIS_ERR on error, REDIS_OK on success */
-static int saveDb(char *filename) {
- dictIterator *di = NULL;
- dictEntry *de;
- uint32_t len;
- uint8_t type;
- FILE *fp;
- char tmpfile[256];
- int j;
+static robj *lookupKeyRead(redisDb *db, robj *key) {
+ expireIfNeeded(db,key);
+ return lookupKey(db,key);
+}
- snprintf(tmpfile,256,"temp-%d.%ld.rdb",(int)time(NULL),(long int)random());
- fp = fopen(tmpfile,"w");
- if (!fp) {
- redisLog(REDIS_WARNING, "Failed saving the DB: %s", strerror(errno));
- return REDIS_ERR;
- }
- if (fwrite("REDIS0000",9,1,fp) == 0) goto werr;
- for (j = 0; j < server.dbnum; j++) {
- dict *d = server.dict[j];
- if (dictGetHashTableUsed(d) == 0) continue;
- di = dictGetIterator(d);
- if (!di) {
- fclose(fp);
- return REDIS_ERR;
- }
+static robj *lookupKeyWrite(redisDb *db, robj *key) {
+ deleteIfVolatile(db,key);
+ return lookupKey(db,key);
+}
- /* Write the SELECT DB opcode */
- type = REDIS_SELECTDB;
- len = htonl(j);
- if (fwrite(&type,1,1,fp) == 0) goto werr;
- if (fwrite(&len,4,1,fp) == 0) goto werr;
+static int deleteKey(redisDb *db, robj *key) {
+ int retval;
- /* Iterate this DB writing every entry */
- while((de = dictNext(di)) != NULL) {
- robj *key = dictGetEntryKey(de);
- robj *o = dictGetEntryVal(de);
+ /* We need to protect key from destruction: after the first dictDelete()
+ * it may happen that 'key' is no longer valid if we don't increment
+ * it's count. This may happen when we get the object reference directly
+ * from the hash table with dictRandomKey() or dict iterators */
+ incrRefCount(key);
+ if (dictSize(db->expires)) dictDelete(db->expires,key);
+ retval = dictDelete(db->dict,key);
+ decrRefCount(key);
- type = o->type;
- len = htonl(sdslen(key->ptr));
- if (fwrite(&type,1,1,fp) == 0) goto werr;
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- if (fwrite(key->ptr,sdslen(key->ptr),1,fp) == 0) goto werr;
- if (type == REDIS_STRING) {
- /* Save a string value */
- sds sval = o->ptr;
- len = htonl(sdslen(sval));
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- if (sdslen(sval) &&
- fwrite(sval,sdslen(sval),1,fp) == 0) goto werr;
- } else if (type == REDIS_LIST) {
- /* Save a list value */
- list *list = o->ptr;
- listNode *ln = list->head;
+ return retval == DICT_OK;
+}
- len = htonl(listLength(list));
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- while(ln) {
- robj *eleobj = listNodeValue(ln);
- len = htonl(sdslen(eleobj->ptr));
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- if (sdslen(eleobj->ptr) && fwrite(eleobj->ptr,sdslen(eleobj->ptr),1,fp) == 0)
- goto werr;
- ln = ln->next;
- }
- } else if (type == REDIS_SET) {
- /* Save a set value */
- dict *set = o->ptr;
- dictIterator *di = dictGetIterator(set);
- dictEntry *de;
+/* Try to share an object against the shared objects pool */
+static robj *tryObjectSharing(robj *o) {
+ struct dictEntry *de;
+ unsigned long c;
- if (!set) oom("dictGetIteraotr");
- len = htonl(dictGetHashTableUsed(set));
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- while((de = dictNext(di)) != NULL) {
- robj *eleobj;
+ if (o == NULL || server.shareobjects == 0) return o;
- eleobj = dictGetEntryKey(de);
- len = htonl(sdslen(eleobj->ptr));
- if (fwrite(&len,4,1,fp) == 0) goto werr;
- if (sdslen(eleobj->ptr) && fwrite(eleobj->ptr,sdslen(eleobj->ptr),1,fp) == 0)
- goto werr;
- }
- dictReleaseIterator(di);
- } else {
- assert(0 != 0);
+ assert(o->type == REDIS_STRING);
+ de = dictFind(server.sharingpool,o);
+ if (de) {
+ robj *shared = dictGetEntryKey(de);
+
+ c = ((unsigned long) dictGetEntryVal(de))+1;
+ dictGetEntryVal(de) = (void*) c;
+ incrRefCount(shared);
+ decrRefCount(o);
+ return shared;
+ } else {
+ /* Here we are using a stream algorihtm: Every time an object is
+ * shared we increment its count, everytime there is a miss we
+ * recrement the counter of a random object. If this object reaches
+ * zero we remove the object and put the current object instead. */
+ if (dictSize(server.sharingpool) >=
+ server.sharingpoolsize) {
+ de = dictGetRandomKey(server.sharingpool);
+ assert(de != NULL);
+ c = ((unsigned long) dictGetEntryVal(de))-1;
+ dictGetEntryVal(de) = (void*) c;
+ if (c == 0) {
+ dictDelete(server.sharingpool,de->key);
+ }
+ } else {
+ c = 0; /* If the pool is empty we want to add this object */
+ }
+ if (c == 0) {
+ int retval;
+
+ retval = dictAdd(server.sharingpool,o,(void*)1);
+ assert(retval == DICT_OK);
+ incrRefCount(o);
+ }
+ return o;
+ }
+}
+
+/* Check if the nul-terminated string 's' can be represented by a long
+ * (that is, is a number that fits into long without any other space or
+ * character before or after the digits).
+ *
+ * If so, the function returns REDIS_OK and *longval is set to the value
+ * of the number. Otherwise REDIS_ERR is returned */
+static int isStringRepresentableAsLong(sds s, long *longval) {
+ char buf[32], *endptr;
+ long value;
+ int slen;
+
+ value = strtol(s, &endptr, 10);
+ if (endptr[0] != '\0') return REDIS_ERR;
+ slen = snprintf(buf,32,"%ld",value);
+
+ /* If the number converted back into a string is not identical
+ * then it's not possible to encode the string as integer */
+ if (sdslen(s) != (unsigned)slen || memcmp(buf,s,slen)) return REDIS_ERR;
+ if (longval) *longval = value;
+ return REDIS_OK;
+}
+
+/* Try to encode a string object in order to save space */
+static int tryObjectEncoding(robj *o) {
+ long value;
+ sds s = o->ptr;
+
+ if (o->encoding != REDIS_ENCODING_RAW)
+ return REDIS_ERR; /* Already encoded */
+
+ /* It's not save to encode shared objects: shared objects can be shared
+ * everywhere in the "object space" of Redis. Encoded objects can only
+ * appear as "values" (and not, for instance, as keys) */
+ if (o->refcount > 1) return REDIS_ERR;
+
+ /* Currently we try to encode only strings */
+ assert(o->type == REDIS_STRING);
+
+ /* Check if we can represent this string as a long integer */
+ if (isStringRepresentableAsLong(s,&value) == REDIS_ERR) return REDIS_ERR;
+
+ /* Ok, this object can be encoded */
+ o->encoding = REDIS_ENCODING_INT;
+ sdsfree(o->ptr);
+ o->ptr = (void*) value;
+ return REDIS_OK;
+}
+
+/* Get a decoded version of an encoded object (returned as a new object) */
+static robj *getDecodedObject(const robj *o) {
+ robj *dec;
+
+ assert(o->encoding != REDIS_ENCODING_RAW);
+ if (o->type == REDIS_STRING && o->encoding == REDIS_ENCODING_INT) {
+ char buf[32];
+
+ snprintf(buf,32,"%ld",(long)o->ptr);
+ dec = createStringObject(buf,strlen(buf));
+ return dec;
+ } else {
+ assert(1 != 1);
+ }
+}
+
+static int compareStringObjects(robj *a, robj *b) {
+ assert(a->type == REDIS_STRING && b->type == REDIS_STRING);
+
+ if (a->encoding == REDIS_ENCODING_INT && b->encoding == REDIS_ENCODING_INT){
+ return (long)a->ptr - (long)b->ptr;
+ } else {
+ int retval;
+
+ incrRefCount(a);
+ incrRefCount(b);
+ if (a->encoding != REDIS_ENCODING_RAW) a = getDecodedObject(a);
+ if (b->encoding != REDIS_ENCODING_RAW) b = getDecodedObject(a);
+ retval = sdscmp(a->ptr,b->ptr);
+ decrRefCount(a);
+ decrRefCount(b);
+ return retval;
+ }
+}
+
+static size_t stringObjectLen(robj *o) {
+ assert(o->type == REDIS_STRING);
+ if (o->encoding == REDIS_ENCODING_RAW) {
+ return sdslen(o->ptr);
+ } else {
+ char buf[32];
+
+ return snprintf(buf,32,"%ld",(long)o->ptr);
+ }
+}
+
+/*============================ DB saving/loading ============================ */
+
+static int rdbSaveType(FILE *fp, unsigned char type) {
+ if (fwrite(&type,1,1,fp) == 0) return -1;
+ return 0;
+}
+
+static int rdbSaveTime(FILE *fp, time_t t) {
+ int32_t t32 = (int32_t) t;
+ if (fwrite(&t32,4,1,fp) == 0) return -1;
+ return 0;
+}
+
+/* check rdbLoadLen() comments for more info */
+static int rdbSaveLen(FILE *fp, uint32_t len) {
+ unsigned char buf[2];
+
+ if (len < (1<<6)) {
+ /* Save a 6 bit len */
+ buf[0] = (len&0xFF)|(REDIS_RDB_6BITLEN<<6);
+ if (fwrite(buf,1,1,fp) == 0) return -1;
+ } else if (len < (1<<14)) {
+ /* Save a 14 bit len */
+ buf[0] = ((len>>8)&0xFF)|(REDIS_RDB_14BITLEN<<6);
+ buf[1] = len&0xFF;
+ if (fwrite(buf,2,1,fp) == 0) return -1;
+ } else {
+ /* Save a 32 bit len */
+ buf[0] = (REDIS_RDB_32BITLEN<<6);
+ if (fwrite(buf,1,1,fp) == 0) return -1;
+ len = htonl(len);
+ if (fwrite(&len,4,1,fp) == 0) return -1;
+ }
+ 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(sds s, 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) != sdslen(s) || memcmp(buf,s,sdslen(s))) return 0;
+
+ /* 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;
+ enc[1] = value&0xFF;
+ return 2;
+ } else if (value >= -(1<<15) && value <= (1<<15)-1) {
+ enc[0] = (REDIS_RDB_ENCVAL<<6)|REDIS_RDB_ENC_INT16;
+ enc[1] = value&0xFF;
+ enc[2] = (value>>8)&0xFF;
+ return 3;
+ } else if (value >= -((long long)1<<31) && value <= ((long long)1<<31)-1) {
+ enc[0] = (REDIS_RDB_ENCVAL<<6)|REDIS_RDB_ENC_INT32;
+ enc[1] = value&0xFF;
+ enc[2] = (value>>8)&0xFF;
+ enc[3] = (value>>16)&0xFF;
+ enc[4] = (value>>24)&0xFF;
+ return 5;
+ } else {
+ return 0;
+ }
+}
+
+static int rdbSaveLzfStringObject(FILE *fp, robj *obj) {
+ unsigned int comprlen, outlen;
+ unsigned char byte;
+ void *out;
+
+ /* We require at least four bytes compression for this to be worth it */
+ outlen = sdslen(obj->ptr)-4;
+ if (outlen <= 0) return 0;
+ if ((out = zmalloc(outlen+1)) == NULL) return 0;
+ comprlen = lzf_compress(obj->ptr, sdslen(obj->ptr), out, outlen);
+ if (comprlen == 0) {
+ zfree(out);
+ return 0;
+ }
+ /* Data compressed! Let's save it on disk */
+ byte = (REDIS_RDB_ENCVAL<<6)|REDIS_RDB_ENC_LZF;
+ if (fwrite(&byte,1,1,fp) == 0) goto writeerr;
+ if (rdbSaveLen(fp,comprlen) == -1) goto writeerr;
+ if (rdbSaveLen(fp,sdslen(obj->ptr)) == -1) goto writeerr;
+ if (fwrite(out,comprlen,1,fp) == 0) goto writeerr;
+ zfree(out);
+ return comprlen;
+
+writeerr:
+ zfree(out);
+ return -1;
+}
+
+/* Save a string objet as [len][data] on disk. If the object is a string
+ * representation of an integer value we try to safe it in a special form */
+static int rdbSaveStringObjectRaw(FILE *fp, robj *obj) {
+ size_t len;
+ int enclen;
+
+ len = sdslen(obj->ptr);
+
+ /* Try integer encoding */
+ if (len <= 11) {
+ unsigned char buf[5];
+ if ((enclen = rdbTryIntegerEncoding(obj->ptr,buf)) > 0) {
+ if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ return 0;
+ }
+ }
+
+ /* Try LZF compression - under 20 bytes it's unable to compress even
+ * aaaaaaaaaaaaaaaaaa so skip it */
+ if (len > 20) {
+ int retval;
+
+ retval = rdbSaveLzfStringObject(fp,obj);
+ if (retval == -1) return -1;
+ if (retval > 0) return 0;
+ /* retval == 0 means data can't be compressed, save the old way */
+ }
+
+ /* Store verbatim */
+ if (rdbSaveLen(fp,len) == -1) return -1;
+ if (len && fwrite(obj->ptr,len,1,fp) == 0) return -1;
+ return 0;
+}
+
+/* Like rdbSaveStringObjectRaw() but handle encoded objects */
+static int rdbSaveStringObject(FILE *fp, robj *obj) {
+ int retval;
+ robj *dec;
+
+ if (obj->encoding != REDIS_ENCODING_RAW) {
+ dec = getDecodedObject(obj);
+ retval = rdbSaveStringObjectRaw(fp,dec);
+ decrRefCount(dec);
+ return retval;
+ } else {
+ return rdbSaveStringObjectRaw(fp,obj);
+ }
+}
+
+/* Save the DB on disk. Return REDIS_ERR on error, REDIS_OK on success */
+static int rdbSave(char *filename) {
+ dictIterator *di = NULL;
+ dictEntry *de;
+ FILE *fp;
+ char tmpfile[256];
+ int j;
+ time_t now = time(NULL);
+
+ snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
+ fp = fopen(tmpfile,"w");
+ if (!fp) {
+ redisLog(REDIS_WARNING, "Failed saving the DB: %s", strerror(errno));
+ return REDIS_ERR;
+ }
+ if (fwrite("REDIS0001",9,1,fp) == 0) goto werr;
+ for (j = 0; j < server.dbnum; j++) {
+ redisDb *db = server.db+j;
+ dict *d = db->dict;
+ if (dictSize(d) == 0) continue;
+ di = dictGetIterator(d);
+ if (!di) {
+ fclose(fp);
+ return REDIS_ERR;
+ }
+
+ /* Write the SELECT DB opcode */
+ if (rdbSaveType(fp,REDIS_SELECTDB) == -1) goto werr;
+ if (rdbSaveLen(fp,j) == -1) goto werr;
+
+ /* Iterate this DB writing every entry */
+ while((de = dictNext(di)) != NULL) {
+ robj *key = dictGetEntryKey(de);
+ robj *o = dictGetEntryVal(de);
+ time_t expiretime = getExpire(db,key);
+
+ /* Save the expire time */
+ if (expiretime != -1) {
+ /* If this key is already expired skip it */
+ if (expiretime < now) continue;
+ if (rdbSaveType(fp,REDIS_EXPIRETIME) == -1) goto werr;
+ if (rdbSaveTime(fp,expiretime) == -1) goto werr;
+ }
+ /* Save the key and associated value */
+ if (rdbSaveType(fp,o->type) == -1) goto werr;
+ if (rdbSaveStringObject(fp,key) == -1) goto werr;
+ if (o->type == REDIS_STRING) {
+ /* Save a string value */
+ if (rdbSaveStringObject(fp,o) == -1) goto werr;
+ } else if (o->type == REDIS_LIST) {
+ /* Save a list value */
+ list *list = o->ptr;
+ listNode *ln;
+
+ listRewind(list);
+ if (rdbSaveLen(fp,listLength(list)) == -1) goto werr;
+ while((ln = listYield(list))) {
+ robj *eleobj = listNodeValue(ln);
+
+ if (rdbSaveStringObject(fp,eleobj) == -1) goto werr;
+ }
+ } else if (o->type == REDIS_SET) {
+ /* Save a set value */
+ dict *set = o->ptr;
+ dictIterator *di = dictGetIterator(set);
+ dictEntry *de;
+
+ if (rdbSaveLen(fp,dictSize(set)) == -1) goto werr;
+ while((de = dictNext(di)) != NULL) {
+ robj *eleobj = dictGetEntryKey(de);
+
+ if (rdbSaveStringObject(fp,eleobj) == -1) goto werr;
+ }
+ dictReleaseIterator(di);
+ } else {
+ assert(0 != 0);
}
}
dictReleaseIterator(di);
}
/* EOF opcode */
- type = REDIS_EOF;
- if (fwrite(&type,1,1,fp) == 0) goto werr;
+ if (rdbSaveType(fp,REDIS_EOF) == -1) goto werr;
+
+ /* Make sure data will not remain on the OS's output buffers */
fflush(fp);
fsync(fileno(fp));
fclose(fp);
return REDIS_ERR;
}
-static int saveDbBackground(char *filename) {
+static int rdbSaveBackground(char *filename) {
pid_t childpid;
if (server.bgsaveinprogress) return REDIS_ERR;
if ((childpid = fork()) == 0) {
/* Child */
close(server.fd);
- if (saveDb(filename) == REDIS_OK) {
+ if (rdbSave(filename) == REDIS_OK) {
exit(0);
} else {
exit(1);
}
} else {
/* Parent */
+ if (childpid == -1) {
+ redisLog(REDIS_WARNING,"Can't save in background: fork: %s",
+ strerror(errno));
+ return REDIS_ERR;
+ }
redisLog(REDIS_NOTICE,"Background saving started by pid %d",childpid);
server.bgsaveinprogress = 1;
+ server.bgsavechildpid = childpid;
return REDIS_OK;
}
return REDIS_OK; /* unreached */
}
-static int loadType(FILE *fp) {
- uint8_t type;
+static void rdbRemoveTempFile(pid_t childpid) {
+ char tmpfile[256];
+
+ snprintf(tmpfile,256,"temp-%d.rdb", (int) childpid);
+ unlink(tmpfile);
+}
+
+static int rdbLoadType(FILE *fp) {
+ unsigned char type;
if (fread(&type,1,1,fp) == 0) return -1;
return type;
}
-static int loadDb(char *filename) {
+static time_t rdbLoadTime(FILE *fp) {
+ int32_t t32;
+ if (fread(&t32,4,1,fp) == 0) return -1;
+ return (time_t) t32;
+}
+
+/* Load an encoded length from the DB, see the REDIS_RDB_* defines on the top
+ * of this file for a description of how this are stored on disk.
+ *
+ * isencoded is set to 1 if the readed length is not actually a length but
+ * an "encoding type", check the above comments for more info */
+static uint32_t rdbLoadLen(FILE *fp, int rdbver, int *isencoded) {
+ unsigned char buf[2];
+ uint32_t len;
+
+ if (isencoded) *isencoded = 0;
+ if (rdbver == 0) {
+ if (fread(&len,4,1,fp) == 0) return REDIS_RDB_LENERR;
+ return ntohl(len);
+ } else {
+ int type;
+
+ if (fread(buf,1,1,fp) == 0) return REDIS_RDB_LENERR;
+ type = (buf[0]&0xC0)>>6;
+ if (type == REDIS_RDB_6BITLEN) {
+ /* Read a 6 bit len */
+ return buf[0]&0x3F;
+ } else if (type == REDIS_RDB_ENCVAL) {
+ /* Read a 6 bit len encoding type */
+ if (isencoded) *isencoded = 1;
+ return buf[0]&0x3F;
+ } else if (type == REDIS_RDB_14BITLEN) {
+ /* Read a 14 bit len */
+ if (fread(buf+1,1,1,fp) == 0) return REDIS_RDB_LENERR;
+ return ((buf[0]&0x3F)<<8)|buf[1];
+ } else {
+ /* Read a 32 bit len */
+ if (fread(&len,4,1,fp) == 0) return REDIS_RDB_LENERR;
+ return ntohl(len);
+ }
+ }
+}
+
+static robj *rdbLoadIntegerObject(FILE *fp, int enctype) {
+ unsigned char enc[4];
+ long long val;
+
+ if (enctype == REDIS_RDB_ENC_INT8) {
+ if (fread(enc,1,1,fp) == 0) return NULL;
+ val = (signed char)enc[0];
+ } else if (enctype == REDIS_RDB_ENC_INT16) {
+ uint16_t v;
+ if (fread(enc,2,1,fp) == 0) return NULL;
+ v = enc[0]|(enc[1]<<8);
+ val = (int16_t)v;
+ } else if (enctype == REDIS_RDB_ENC_INT32) {
+ uint32_t v;
+ if (fread(enc,4,1,fp) == 0) return NULL;
+ v = enc[0]|(enc[1]<<8)|(enc[2]<<16)|(enc[3]<<24);
+ val = (int32_t)v;
+ } else {
+ val = 0; /* anti-warning */
+ assert(0!=0);
+ }
+ return createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",val));
+}
+
+static robj *rdbLoadLzfStringObject(FILE*fp, int rdbver) {
+ unsigned int len, clen;
+ unsigned char *c = NULL;
+ sds val = NULL;
+
+ if ((clen = rdbLoadLen(fp,rdbver,NULL)) == REDIS_RDB_LENERR) return NULL;
+ if ((len = rdbLoadLen(fp,rdbver,NULL)) == REDIS_RDB_LENERR) return NULL;
+ if ((c = zmalloc(clen)) == NULL) goto err;
+ if ((val = sdsnewlen(NULL,len)) == NULL) goto err;
+ if (fread(c,clen,1,fp) == 0) goto err;
+ if (lzf_decompress(c,clen,val,len) == 0) goto err;
+ zfree(c);
+ return createObject(REDIS_STRING,val);
+err:
+ zfree(c);
+ sdsfree(val);
+ return NULL;
+}
+
+static robj *rdbLoadStringObject(FILE*fp, int rdbver) {
+ int isencoded;
+ uint32_t len;
+ sds val;
+
+ len = rdbLoadLen(fp,rdbver,&isencoded);
+ if (isencoded) {
+ switch(len) {
+ case REDIS_RDB_ENC_INT8:
+ case REDIS_RDB_ENC_INT16:
+ case REDIS_RDB_ENC_INT32:
+ return tryObjectSharing(rdbLoadIntegerObject(fp,len));
+ case REDIS_RDB_ENC_LZF:
+ return tryObjectSharing(rdbLoadLzfStringObject(fp,rdbver));
+ default:
+ assert(0!=0);
+ }
+ }
+
+ if (len == REDIS_RDB_LENERR) return NULL;
+ val = sdsnewlen(NULL,len);
+ if (len && fread(val,len,1,fp) == 0) {
+ sdsfree(val);
+ return NULL;
+ }
+ return tryObjectSharing(createObject(REDIS_STRING,val));
+}
+
+static int rdbLoad(char *filename) {
FILE *fp;
- char buf[REDIS_LOADBUF_LEN]; /* Try to use this buffer instead of */
- char vbuf[REDIS_LOADBUF_LEN]; /* malloc() when the element is small */
- char *key = NULL, *val = NULL;
- uint32_t klen,vlen,dbid;
- int type;
- int retval;
- dict *d = server.dict[0];
+ robj *keyobj = NULL;
+ uint32_t dbid;
+ int type, retval, rdbver;
+ dict *d = server.db[0].dict;
+ redisDb *db = server.db+0;
+ char buf[1024];
+ time_t expiretime = -1, now = time(NULL);
fp = fopen(filename,"r");
if (!fp) return REDIS_ERR;
if (fread(buf,9,1,fp) == 0) goto eoferr;
- if (memcmp(buf,"REDIS0000",9) != 0) {
+ buf[9] = '\0';
+ if (memcmp(buf,"REDIS",5) != 0) {
fclose(fp);
redisLog(REDIS_WARNING,"Wrong signature trying to load DB from file");
return REDIS_ERR;
}
+ rdbver = atoi(buf+5);
+ if (rdbver > 1) {
+ fclose(fp);
+ redisLog(REDIS_WARNING,"Can't handle RDB format version %d",rdbver);
+ return REDIS_ERR;
+ }
while(1) {
robj *o;
/* Read type. */
- if ((type = loadType(fp)) == -1) goto eoferr;
+ if ((type = rdbLoadType(fp)) == -1) goto eoferr;
+ if (type == REDIS_EXPIRETIME) {
+ if ((expiretime = rdbLoadTime(fp)) == -1) goto eoferr;
+ /* We read the time so we need to read the object type again */
+ if ((type = rdbLoadType(fp)) == -1) goto eoferr;
+ }
if (type == REDIS_EOF) break;
/* Handle SELECT DB opcode as a special case */
if (type == REDIS_SELECTDB) {
- if (fread(&dbid,4,1,fp) == 0) goto eoferr;
- dbid = ntohl(dbid);
+ if ((dbid = rdbLoadLen(fp,rdbver,NULL)) == REDIS_RDB_LENERR)
+ goto eoferr;
if (dbid >= (unsigned)server.dbnum) {
- redisLog(REDIS_WARNING,"FATAL: Data file was created with a Redis server compiled to handle more than %d databases. Exiting\n", server.dbnum);
+ redisLog(REDIS_WARNING,"FATAL: Data file was created with a Redis server configured to handle more than %d databases. Exiting\n", server.dbnum);
exit(1);
}
- d = server.dict[dbid];
+ db = server.db+dbid;
+ d = db->dict;
continue;
}
/* Read key */
- if (fread(&klen,4,1,fp) == 0) goto eoferr;
- klen = ntohl(klen);
- if (klen <= REDIS_LOADBUF_LEN) {
- key = buf;
- } else {
- key = zmalloc(klen);
- if (!key) oom("Loading DB from file");
- }
- if (fread(key,klen,1,fp) == 0) goto eoferr;
+ if ((keyobj = rdbLoadStringObject(fp,rdbver)) == NULL) goto eoferr;
if (type == REDIS_STRING) {
/* Read string value */
- if (fread(&vlen,4,1,fp) == 0) goto eoferr;
- vlen = ntohl(vlen);
- if (vlen <= REDIS_LOADBUF_LEN) {
- val = vbuf;
- } else {
- val = zmalloc(vlen);
- if (!val) oom("Loading DB from file");
- }
- if (vlen && fread(val,vlen,1,fp) == 0) goto eoferr;
- o = createObject(REDIS_STRING,sdsnewlen(val,vlen));
+ if ((o = rdbLoadStringObject(fp,rdbver)) == NULL) goto eoferr;
+ tryObjectEncoding(o);
} else if (type == REDIS_LIST || type == REDIS_SET) {
/* Read list/set value */
uint32_t listlen;
- if (fread(&listlen,4,1,fp) == 0) goto eoferr;
- listlen = ntohl(listlen);
+
+ if ((listlen = rdbLoadLen(fp,rdbver,NULL)) == REDIS_RDB_LENERR)
+ goto eoferr;
o = (type == REDIS_LIST) ? createListObject() : createSetObject();
/* Load every single element of the list/set */
while(listlen--) {
robj *ele;
- if (fread(&vlen,4,1,fp) == 0) goto eoferr;
- vlen = ntohl(vlen);
- if (vlen <= REDIS_LOADBUF_LEN) {
- val = vbuf;
- } else {
- val = zmalloc(vlen);
- if (!val) oom("Loading DB from file");
- }
- if (vlen && fread(val,vlen,1,fp) == 0) goto eoferr;
- ele = createObject(REDIS_STRING,sdsnewlen(val,vlen));
+ if ((ele = rdbLoadStringObject(fp,rdbver)) == NULL) goto eoferr;
+ tryObjectEncoding(ele);
if (type == REDIS_LIST) {
- if (!listAddNodeTail((list*)o->ptr,ele))
- oom("listAddNodeTail");
+ listAddNodeTail((list*)o->ptr,ele);
} else {
- if (dictAdd((dict*)o->ptr,ele,NULL) == DICT_ERR)
- oom("dictAdd");
+ dictAdd((dict*)o->ptr,ele,NULL);
}
- /* free the temp buffer if needed */
- if (val != vbuf) zfree(val);
- val = NULL;
}
} else {
assert(0 != 0);
}
/* Add the new object in the hash table */
- retval = dictAdd(d,createStringObject(key,klen),o);
+ retval = dictAdd(d,keyobj,o);
if (retval == DICT_ERR) {
- redisLog(REDIS_WARNING,"Loading DB, duplicated key found! Unrecoverable error, exiting now.");
+ redisLog(REDIS_WARNING,"Loading DB, duplicated key (%s) found! Unrecoverable error, exiting now.", keyobj->ptr);
exit(1);
}
- /* Iteration cleanup */
- if (key != buf) zfree(key);
- if (val != vbuf) zfree(val);
- key = val = NULL;
+ /* Set the expire time if needed */
+ if (expiretime != -1) {
+ setExpire(db,keyobj,expiretime);
+ /* Delete this key if already expired */
+ if (expiretime < now) deleteKey(db,keyobj);
+ expiretime = -1;
+ }
+ keyobj = o = NULL;
}
fclose(fp);
return REDIS_OK;
eoferr: /* unexpected end of file is handled here with a fatal exit */
- if (key != buf) zfree(key);
- if (val != vbuf) zfree(val);
- redisLog(REDIS_WARNING,"Short read loading DB. Unrecoverable error, exiting now.");
+ if (keyobj) decrRefCount(keyobj);
+ redisLog(REDIS_WARNING,"Short read or OOM loading DB. Unrecoverable error, exiting now.");
exit(1);
return REDIS_ERR; /* Just to avoid warning */
}
/*================================== Commands =============================== */
+static void authCommand(redisClient *c) {
+ if (!server.requirepass || !strcmp(c->argv[1]->ptr, server.requirepass)) {
+ c->authenticated = 1;
+ addReply(c,shared.ok);
+ } else {
+ c->authenticated = 0;
+ addReply(c,shared.err);
+ }
+}
+
static void pingCommand(redisClient *c) {
addReply(c,shared.pong);
}
static void echoCommand(redisClient *c) {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",
- (int)sdslen(c->argv[1]->ptr)));
+ addReplyBulkLen(c,c->argv[1]);
addReply(c,c->argv[1]);
addReply(c,shared.crlf);
}
static void setGenericCommand(redisClient *c, int nx) {
int retval;
- retval = dictAdd(c->dict,c->argv[1],c->argv[2]);
+ retval = dictAdd(c->db->dict,c->argv[1],c->argv[2]);
if (retval == DICT_ERR) {
if (!nx) {
- dictReplace(c->dict,c->argv[1],c->argv[2]);
+ dictReplace(c->db->dict,c->argv[1],c->argv[2]);
incrRefCount(c->argv[2]);
} else {
addReply(c,shared.czero);
incrRefCount(c->argv[2]);
}
server.dirty++;
+ removeExpire(c->db,c->argv[1]);
addReply(c, nx ? shared.cone : shared.ok);
}
static void setCommand(redisClient *c) {
- return setGenericCommand(c,0);
+ setGenericCommand(c,0);
}
static void setnxCommand(redisClient *c) {
- return setGenericCommand(c,1);
+ setGenericCommand(c,1);
}
static void getCommand(redisClient *c) {
- dictEntry *de;
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ robj *o = lookupKeyRead(c->db,c->argv[1]);
+
+ if (o == NULL) {
addReply(c,shared.nullbulk);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_STRING) {
addReply(c,shared.wrongtypeerr);
} else {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",(int)sdslen(o->ptr)));
+ addReplyBulkLen(c,o);
addReply(c,o);
addReply(c,shared.crlf);
}
}
}
+static void getsetCommand(redisClient *c) {
+ getCommand(c);
+ if (dictAdd(c->db->dict,c->argv[1],c->argv[2]) == DICT_ERR) {
+ dictReplace(c->db->dict,c->argv[1],c->argv[2]);
+ } else {
+ incrRefCount(c->argv[1]);
+ }
+ incrRefCount(c->argv[2]);
+ server.dirty++;
+ removeExpire(c->db,c->argv[1]);
+}
+
static void mgetCommand(redisClient *c) {
- dictEntry *de;
int j;
addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",c->argc-1));
for (j = 1; j < c->argc; j++) {
- de = dictFind(c->dict,c->argv[j]);
- if (de == NULL) {
+ robj *o = lookupKeyRead(c->db,c->argv[j]);
+ if (o == NULL) {
addReply(c,shared.nullbulk);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_STRING) {
addReply(c,shared.nullbulk);
} else {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",(int)sdslen(o->ptr)));
+ addReplyBulkLen(c,o);
addReply(c,o);
addReply(c,shared.crlf);
}
}
}
-static void incrDecrCommand(redisClient *c, int incr) {
- dictEntry *de;
+static void incrDecrCommand(redisClient *c, long long incr) {
long long value;
int retval;
robj *o;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
value = 0;
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_STRING) {
value = 0;
} else {
char *eptr;
- value = strtoll(o->ptr, &eptr, 10);
+ if (o->encoding == REDIS_ENCODING_RAW)
+ value = strtoll(o->ptr, &eptr, 10);
+ else if (o->encoding == REDIS_ENCODING_INT)
+ value = (long)o->ptr;
+ else
+ assert(1 != 1);
}
}
value += incr;
o = createObject(REDIS_STRING,sdscatprintf(sdsempty(),"%lld",value));
- retval = dictAdd(c->dict,c->argv[1],o);
+ tryObjectEncoding(o);
+ retval = dictAdd(c->db->dict,c->argv[1],o);
if (retval == DICT_ERR) {
- dictReplace(c->dict,c->argv[1],o);
+ dictReplace(c->db->dict,c->argv[1],o);
+ removeExpire(c->db,c->argv[1]);
} else {
incrRefCount(c->argv[1]);
}
}
static void incrCommand(redisClient *c) {
- return incrDecrCommand(c,1);
+ incrDecrCommand(c,1);
}
static void decrCommand(redisClient *c) {
- return incrDecrCommand(c,-1);
+ incrDecrCommand(c,-1);
}
static void incrbyCommand(redisClient *c) {
- int incr = atoi(c->argv[2]->ptr);
- return incrDecrCommand(c,incr);
+ long long incr = strtoll(c->argv[2]->ptr, NULL, 10);
+ incrDecrCommand(c,incr);
}
static void decrbyCommand(redisClient *c) {
- int incr = atoi(c->argv[2]->ptr);
- return incrDecrCommand(c,-incr);
+ long long incr = strtoll(c->argv[2]->ptr, NULL, 10);
+ incrDecrCommand(c,-incr);
}
/* ========================= Type agnostic commands ========================= */
static void delCommand(redisClient *c) {
- if (dictDelete(c->dict,c->argv[1]) == DICT_OK) {
- server.dirty++;
- addReply(c,shared.cone);
- } else {
+ int deleted = 0, j;
+
+ for (j = 1; j < c->argc; j++) {
+ if (deleteKey(c->db,c->argv[j])) {
+ server.dirty++;
+ deleted++;
+ }
+ }
+ switch(deleted) {
+ case 0:
addReply(c,shared.czero);
+ break;
+ case 1:
+ addReply(c,shared.cone);
+ break;
+ default:
+ addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",deleted));
+ break;
}
}
static void existsCommand(redisClient *c) {
- dictEntry *de;
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL)
- addReply(c,shared.czero);
- else
- addReply(c,shared.cone);
+ addReply(c,lookupKeyRead(c->db,c->argv[1]) ? shared.cone : shared.czero);
}
static void selectCommand(redisClient *c) {
int id = atoi(c->argv[1]->ptr);
if (selectDb(c,id) == REDIS_ERR) {
- addReplySds(c,"-ERR invalid DB index\r\n");
+ addReplySds(c,sdsnew("-ERR invalid DB index\r\n"));
} else {
addReply(c,shared.ok);
}
static void randomkeyCommand(redisClient *c) {
dictEntry *de;
-
- de = dictGetRandomKey(c->dict);
+
+ while(1) {
+ de = dictGetRandomKey(c->db->dict);
+ if (!de || expireIfNeeded(c->db,dictGetEntryKey(de)) == 0) break;
+ }
if (de == NULL) {
+ addReply(c,shared.plus);
addReply(c,shared.crlf);
} else {
addReply(c,shared.plus);
int numkeys = 0, keyslen = 0;
robj *lenobj = createObject(REDIS_STRING,NULL);
- di = dictGetIterator(c->dict);
- if (!di) oom("dictGetIterator");
+ di = dictGetIterator(c->db->dict);
addReply(c,lenobj);
decrRefCount(lenobj);
while((de = dictNext(di)) != NULL) {
robj *keyobj = dictGetEntryKey(de);
+
sds key = keyobj->ptr;
if ((pattern[0] == '*' && pattern[1] == '\0') ||
stringmatchlen(pattern,plen,key,sdslen(key),0)) {
- if (numkeys != 0)
- addReply(c,shared.space);
- addReply(c,keyobj);
- numkeys++;
- keyslen += sdslen(key);
+ if (expireIfNeeded(c->db,keyobj) == 0) {
+ if (numkeys != 0)
+ addReply(c,shared.space);
+ addReply(c,keyobj);
+ numkeys++;
+ keyslen += sdslen(key);
+ }
}
}
dictReleaseIterator(di);
static void dbsizeCommand(redisClient *c) {
addReplySds(c,
- sdscatprintf(sdsempty(),":%lu\r\n",dictGetHashTableUsed(c->dict)));
+ sdscatprintf(sdsempty(),":%lu\r\n",dictSize(c->db->dict)));
}
static void lastsaveCommand(redisClient *c) {
}
static void typeCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
char *type;
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o == NULL) {
type = "+none";
} else {
- robj *o = dictGetEntryVal(de);
-
switch(o->type) {
case REDIS_STRING: type = "+string"; break;
case REDIS_LIST: type = "+list"; break;
}
static void saveCommand(redisClient *c) {
- if (saveDb(server.dbfilename) == REDIS_OK) {
+ if (server.bgsaveinprogress) {
+ addReplySds(c,sdsnew("-ERR background save in progress\r\n"));
+ return;
+ }
+ if (rdbSave(server.dbfilename) == REDIS_OK) {
addReply(c,shared.ok);
} else {
addReply(c,shared.err);
addReplySds(c,sdsnew("-ERR background save already in progress\r\n"));
return;
}
- if (saveDbBackground(server.dbfilename) == REDIS_OK) {
+ if (rdbSaveBackground(server.dbfilename) == REDIS_OK) {
addReply(c,shared.ok);
} else {
addReply(c,shared.err);
static void shutdownCommand(redisClient *c) {
redisLog(REDIS_WARNING,"User requested shutdown, saving DB...");
- if (saveDb(server.dbfilename) == REDIS_OK) {
- if (server.daemonize) {
- unlink(server.pidfile);
- }
+ /* 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.bgsaveinprogress) {
+ redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
+ kill(server.bgsavechildpid,SIGKILL);
+ rdbRemoveTempFile(server.bgsavechildpid);
+ }
+ /* SYNC SAVE */
+ 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(1);
} 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"));
}
}
static void renameGenericCommand(redisClient *c, int nx) {
- dictEntry *de;
robj *o;
/* To use the same key as src and dst is probably an error */
return;
}
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nokeyerr);
return;
}
- o = dictGetEntryVal(de);
incrRefCount(o);
- if (dictAdd(c->dict,c->argv[2],o) == DICT_ERR) {
+ deleteIfVolatile(c->db,c->argv[2]);
+ if (dictAdd(c->db->dict,c->argv[2],o) == DICT_ERR) {
if (nx) {
decrRefCount(o);
addReply(c,shared.czero);
return;
}
- dictReplace(c->dict,c->argv[2],o);
+ dictReplace(c->db->dict,c->argv[2],o);
} else {
incrRefCount(c->argv[2]);
}
- dictDelete(c->dict,c->argv[1]);
+ deleteKey(c->db,c->argv[1]);
server.dirty++;
addReply(c,nx ? shared.cone : shared.ok);
}
}
static void moveCommand(redisClient *c) {
- dictEntry *de;
- robj *o, *key;
- dict *src, *dst;
+ robj *o;
+ redisDb *src, *dst;
int srcid;
/* Obtain source and target DB pointers */
- src = c->dict;
- srcid = c->dictid;
+ src = c->db;
+ srcid = c->db->id;
if (selectDb(c,atoi(c->argv[2]->ptr)) == REDIS_ERR) {
addReply(c,shared.outofrangeerr);
return;
}
- dst = c->dict;
- c->dict = src;
- c->dictid = srcid;
+ dst = c->db;
+ selectDb(c,srcid); /* Back to the source DB */
/* If the user is moving using as target the same
* DB as the source DB it is probably an error. */
}
/* Check if the element exists and get a reference */
- de = dictFind(c->dict,c->argv[1]);
- if (!de) {
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (!o) {
addReply(c,shared.czero);
return;
}
/* Try to add the element to the target DB */
- key = dictGetEntryKey(de);
- o = dictGetEntryVal(de);
- if (dictAdd(dst,key,o) == DICT_ERR) {
+ deleteIfVolatile(dst,c->argv[1]);
+ if (dictAdd(dst->dict,c->argv[1],o) == DICT_ERR) {
addReply(c,shared.czero);
return;
}
- incrRefCount(key);
+ incrRefCount(c->argv[1]);
incrRefCount(o);
/* OK! key moved, free the entry in the source DB */
- dictDelete(src,c->argv[1]);
+ deleteKey(src,c->argv[1]);
server.dirty++;
addReply(c,shared.cone);
}
/* =================================== Lists ================================ */
static void pushGenericCommand(redisClient *c, int where) {
robj *lobj;
- dictEntry *de;
list *list;
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+
+ lobj = lookupKeyWrite(c->db,c->argv[1]);
+ if (lobj == NULL) {
lobj = createListObject();
list = lobj->ptr;
if (where == REDIS_HEAD) {
- if (!listAddNodeHead(list,c->argv[2])) oom("listAddNodeHead");
+ listAddNodeHead(list,c->argv[2]);
} else {
- if (!listAddNodeTail(list,c->argv[2])) oom("listAddNodeTail");
+ listAddNodeTail(list,c->argv[2]);
}
- dictAdd(c->dict,c->argv[1],lobj);
+ dictAdd(c->db->dict,c->argv[1],lobj);
incrRefCount(c->argv[1]);
incrRefCount(c->argv[2]);
} else {
- lobj = dictGetEntryVal(de);
if (lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
list = lobj->ptr;
if (where == REDIS_HEAD) {
- if (!listAddNodeHead(list,c->argv[2])) oom("listAddNodeHead");
+ listAddNodeHead(list,c->argv[2]);
} else {
- if (!listAddNodeTail(list,c->argv[2])) oom("listAddNodeTail");
+ listAddNodeTail(list,c->argv[2]);
}
incrRefCount(c->argv[2]);
}
}
static void llenCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
list *l;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.czero);
return;
} else {
- robj *o = dictGetEntryVal(de);
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
}
static void lindexCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
int index = atoi(c->argv[2]->ptr);
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nullbulk);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
addReply(c,shared.nullbulk);
} else {
robj *ele = listNodeValue(ln);
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",(int)sdslen(ele->ptr)));
+ addReplyBulkLen(c,ele);
addReply(c,ele);
addReply(c,shared.crlf);
}
}
static void lsetCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
int index = atoi(c->argv[2]->ptr);
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nokeyerr);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
}
static void popGenericCommand(redisClient *c, int where) {
- dictEntry *de;
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ robj *o;
+
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nullbulk);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
addReply(c,shared.nullbulk);
} else {
robj *ele = listNodeValue(ln);
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",(int)sdslen(ele->ptr)));
+ addReplyBulkLen(c,ele);
addReply(c,ele);
addReply(c,shared.crlf);
listDelNode(list,ln);
}
static void lrangeCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
int start = atoi(c->argv[2]->ptr);
int end = atoi(c->argv[3]->ptr);
-
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nullmultibulk);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",rangelen));
for (j = 0; j < rangelen; j++) {
ele = listNodeValue(ln);
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",(int)sdslen(ele->ptr)));
+ addReplyBulkLen(c,ele);
addReply(c,ele);
addReply(c,shared.crlf);
ln = ln->next;
}
static void ltrimCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
int start = atoi(c->argv[2]->ptr);
int end = atoi(c->argv[3]->ptr);
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.nokeyerr);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
ln = listLast(list);
listDelNode(list,ln);
}
- addReply(c,shared.ok);
server.dirty++;
+ addReply(c,shared.ok);
}
}
}
static void lremCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
- addReply(c,shared.nokeyerr);
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
+ addReply(c,shared.czero);
} else {
- robj *o = dictGetEntryVal(de);
-
if (o->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
} else {
}
ln = fromtail ? list->tail : list->head;
while (ln) {
- next = fromtail ? ln->prev : ln->next;
robj *ele = listNodeValue(ln);
- if (sdscmp(ele->ptr,c->argv[3]->ptr) == 0) {
+
+ next = fromtail ? ln->prev : ln->next;
+ if (compareStringObjects(ele,c->argv[3]) == 0) {
listDelNode(list,ln);
server.dirty++;
removed++;
/* ==================================== Sets ================================ */
static void saddCommand(redisClient *c) {
- dictEntry *de;
robj *set;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ set = lookupKeyWrite(c->db,c->argv[1]);
+ if (set == NULL) {
set = createSetObject();
- dictAdd(c->dict,c->argv[1],set);
+ dictAdd(c->db->dict,c->argv[1],set);
incrRefCount(c->argv[1]);
} else {
- set = dictGetEntryVal(de);
if (set->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
return;
}
static void sremCommand(redisClient *c) {
- dictEntry *de;
+ robj *set;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ set = lookupKeyWrite(c->db,c->argv[1]);
+ if (set == NULL) {
addReply(c,shared.czero);
} else {
- robj *set;
-
- set = dictGetEntryVal(de);
if (set->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
return;
}
if (dictDelete(set->ptr,c->argv[2]) == DICT_OK) {
server.dirty++;
+ if (htNeedsResize(set->ptr)) dictResize(set->ptr);
addReply(c,shared.cone);
} else {
addReply(c,shared.czero);
}
}
+static void smoveCommand(redisClient *c) {
+ robj *srcset, *dstset;
+
+ srcset = lookupKeyWrite(c->db,c->argv[1]);
+ dstset = lookupKeyWrite(c->db,c->argv[2]);
+
+ /* If the source key does not exist return 0, if it's of the wrong type
+ * raise an error */
+ if (srcset == NULL || srcset->type != REDIS_SET) {
+ addReply(c, srcset ? shared.wrongtypeerr : shared.czero);
+ return;
+ }
+ /* Error if the destination key is not a set as well */
+ if (dstset && dstset->type != REDIS_SET) {
+ addReply(c,shared.wrongtypeerr);
+ return;
+ }
+ /* Remove the element from the source set */
+ if (dictDelete(srcset->ptr,c->argv[3]) == DICT_ERR) {
+ /* Key not found in the src set! return zero */
+ addReply(c,shared.czero);
+ return;
+ }
+ server.dirty++;
+ /* Add the element to the destination set */
+ if (!dstset) {
+ dstset = createSetObject();
+ dictAdd(c->db->dict,c->argv[2],dstset);
+ incrRefCount(c->argv[2]);
+ }
+ if (dictAdd(dstset->ptr,c->argv[3],NULL) == DICT_OK)
+ incrRefCount(c->argv[3]);
+ addReply(c,shared.cone);
+}
+
static void sismemberCommand(redisClient *c) {
- dictEntry *de;
+ robj *set;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ set = lookupKeyRead(c->db,c->argv[1]);
+ if (set == NULL) {
addReply(c,shared.czero);
} else {
- robj *set;
-
- set = dictGetEntryVal(de);
if (set->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
return;
}
static void scardCommand(redisClient *c) {
- dictEntry *de;
+ robj *o;
dict *s;
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ o = lookupKeyRead(c->db,c->argv[1]);
+ if (o == NULL) {
addReply(c,shared.czero);
return;
} else {
- robj *o = dictGetEntryVal(de);
if (o->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
} else {
s = o->ptr;
addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",
- dictGetHashTableUsed(s)));
+ dictSize(s)));
+ }
+ }
+}
+
+static void spopCommand(redisClient *c) {
+ robj *set;
+ dictEntry *de;
+
+ set = lookupKeyWrite(c->db,c->argv[1]);
+ if (set == NULL) {
+ addReply(c,shared.nullbulk);
+ } else {
+ if (set->type != REDIS_SET) {
+ addReply(c,shared.wrongtypeerr);
+ return;
+ }
+ de = dictGetRandomKey(set->ptr);
+ if (de == NULL) {
+ addReply(c,shared.nullbulk);
+ } else {
+ robj *ele = dictGetEntryKey(de);
+
+ addReplyBulkLen(c,ele);
+ addReply(c,ele);
+ addReply(c,shared.crlf);
+ dictDelete(set->ptr,ele);
+ if (htNeedsResize(set->ptr)) dictResize(set->ptr);
+ server.dirty++;
+ }
+ }
+}
+
+static void srandmemberCommand(redisClient *c) {
+ robj *set;
+ dictEntry *de;
+
+ set = lookupKeyRead(c->db,c->argv[1]);
+ if (set == NULL) {
+ addReply(c,shared.nullbulk);
+ } else {
+ if (set->type != REDIS_SET) {
+ addReply(c,shared.wrongtypeerr);
+ return;
+ }
+ de = dictGetRandomKey(set->ptr);
+ if (de == NULL) {
+ addReply(c,shared.nullbulk);
+ } else {
+ robj *ele = dictGetEntryKey(de);
+
+ addReplyBulkLen(c,ele);
+ addReply(c,ele);
+ addReply(c,shared.crlf);
}
}
}
static int qsortCompareSetsByCardinality(const void *s1, const void *s2) {
dict **d1 = (void*) s1, **d2 = (void*) s2;
- return dictGetHashTableUsed(*d1)-dictGetHashTableUsed(*d2);
+ return dictSize(*d1)-dictSize(*d2);
}
static void sinterGenericCommand(redisClient *c, robj **setskeys, int setsnum, robj *dstkey) {
robj *lenobj = NULL, *dstset = NULL;
int j, cardinality = 0;
- if (!dv) oom("sinterCommand");
for (j = 0; j < setsnum; j++) {
robj *setobj;
- dictEntry *de;
-
- de = dictFind(c->dict,setskeys[j]);
- if (!de) {
+
+ setobj = dstkey ?
+ lookupKeyWrite(c->db,setskeys[j]) :
+ lookupKeyRead(c->db,setskeys[j]);
+ if (!setobj) {
zfree(dv);
- addReply(c,shared.nokeyerr);
+ if (dstkey) {
+ deleteKey(c->db,dstkey);
+ addReply(c,shared.ok);
+ } else {
+ addReply(c,shared.nullmultibulk);
+ }
return;
}
- setobj = dictGetEntryVal(de);
if (setobj->type != REDIS_SET) {
zfree(dv);
addReply(c,shared.wrongtypeerr);
/* If we have a target key where to store the resulting set
* create this key with an empty set inside */
dstset = createSetObject();
- dictDelete(c->dict,dstkey);
- dictAdd(c->dict,dstkey,dstset);
- incrRefCount(dstkey);
}
/* Iterate all the elements of the first (smallest) set, and test
* the element against all the other sets, if at least one set does
* not include the element it is discarded */
di = dictGetIterator(dv[0]);
- if (!di) oom("dictGetIterator");
while((de = dictNext(di)) != NULL) {
robj *ele;
continue; /* at least one set does not contain the member */
ele = dictGetEntryKey(de);
if (!dstkey) {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",sdslen(ele->ptr)));
+ addReplyBulkLen(c,ele);
addReply(c,ele);
addReply(c,shared.crlf);
cardinality++;
}
dictReleaseIterator(di);
- if (!dstkey)
+ if (dstkey) {
+ /* Store the resulting set into the target */
+ deleteKey(c->db,dstkey);
+ dictAdd(c->db->dict,dstkey,dstset);
+ incrRefCount(dstkey);
+ }
+
+ if (!dstkey) {
lenobj->ptr = sdscatprintf(sdsempty(),"*%d\r\n",cardinality);
- else
- addReply(c,shared.ok);
+ } else {
+ addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",
+ dictSize((dict*)dstset->ptr)));
+ server.dirty++;
+ }
zfree(dv);
}
sinterGenericCommand(c,c->argv+2,c->argc-2,c->argv[1]);
}
+#define REDIS_OP_UNION 0
+#define REDIS_OP_DIFF 1
+
+static void sunionDiffGenericCommand(redisClient *c, robj **setskeys, int setsnum, robj *dstkey, int op) {
+ dict **dv = zmalloc(sizeof(dict*)*setsnum);
+ dictIterator *di;
+ dictEntry *de;
+ robj *dstset = NULL;
+ int j, cardinality = 0;
+
+ for (j = 0; j < setsnum; j++) {
+ robj *setobj;
+
+ setobj = dstkey ?
+ lookupKeyWrite(c->db,setskeys[j]) :
+ lookupKeyRead(c->db,setskeys[j]);
+ if (!setobj) {
+ dv[j] = NULL;
+ continue;
+ }
+ if (setobj->type != REDIS_SET) {
+ zfree(dv);
+ addReply(c,shared.wrongtypeerr);
+ return;
+ }
+ dv[j] = setobj->ptr;
+ }
+
+ /* We need a temp set object to store our union. If the dstkey
+ * is not NULL (that is, we are inside an SUNIONSTORE operation) then
+ * this set object will be the resulting object to set into the target key*/
+ dstset = createSetObject();
+
+ /* Iterate all the elements of all the sets, add every element a single
+ * time to the result set */
+ for (j = 0; j < setsnum; j++) {
+ if (op == REDIS_OP_DIFF && j == 0 && !dv[j]) break; /* result set is empty */
+ if (!dv[j]) continue; /* non existing keys are like empty sets */
+
+ di = dictGetIterator(dv[j]);
+
+ while((de = dictNext(di)) != NULL) {
+ robj *ele;
+
+ /* dictAdd will not add the same element multiple times */
+ ele = dictGetEntryKey(de);
+ if (op == REDIS_OP_UNION || j == 0) {
+ if (dictAdd(dstset->ptr,ele,NULL) == DICT_OK) {
+ incrRefCount(ele);
+ cardinality++;
+ }
+ } else if (op == REDIS_OP_DIFF) {
+ if (dictDelete(dstset->ptr,ele) == DICT_OK) {
+ cardinality--;
+ }
+ }
+ }
+ dictReleaseIterator(di);
+
+ if (op == REDIS_OP_DIFF && cardinality == 0) break; /* result set is empty */
+ }
+
+ /* Output the content of the resulting set, if not in STORE mode */
+ if (!dstkey) {
+ addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",cardinality));
+ di = dictGetIterator(dstset->ptr);
+ while((de = dictNext(di)) != NULL) {
+ robj *ele;
+
+ ele = dictGetEntryKey(de);
+ addReplyBulkLen(c,ele);
+ addReply(c,ele);
+ addReply(c,shared.crlf);
+ }
+ dictReleaseIterator(di);
+ } else {
+ /* If we have a target key where to store the resulting set
+ * create this key with the result set inside */
+ deleteKey(c->db,dstkey);
+ dictAdd(c->db->dict,dstkey,dstset);
+ incrRefCount(dstkey);
+ }
+
+ /* Cleanup */
+ if (!dstkey) {
+ decrRefCount(dstset);
+ } else {
+ addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",
+ dictSize((dict*)dstset->ptr)));
+ server.dirty++;
+ }
+ zfree(dv);
+}
+
+static void sunionCommand(redisClient *c) {
+ sunionDiffGenericCommand(c,c->argv+1,c->argc-1,NULL,REDIS_OP_UNION);
+}
+
+static void sunionstoreCommand(redisClient *c) {
+ sunionDiffGenericCommand(c,c->argv+2,c->argc-2,c->argv[1],REDIS_OP_UNION);
+}
+
+static void sdiffCommand(redisClient *c) {
+ sunionDiffGenericCommand(c,c->argv+1,c->argc-1,NULL,REDIS_OP_DIFF);
+}
+
+static void sdiffstoreCommand(redisClient *c) {
+ sunionDiffGenericCommand(c,c->argv+2,c->argc-2,c->argv[1],REDIS_OP_DIFF);
+}
+
+/* ==================================== ZSets =============================== */
+
+/* ZSETs are ordered sets using two data structures to hold the same elements
+ * in order to get O(log(N)) INSERT and REMOVE operations into a sorted
+ * data structure.
+ *
+ * The elements are added to an hash table mapping Redis objects to scores.
+ * At the same time the elements are added to a skip list mapping scores
+ * to Redis objects (so objects are sorted by scores in this "view"). */
+
+/* This skiplist implementation is almost a C translation of the original
+ * algorithm described by William Pugh in "Skip Lists: A Probabilistic
+ * Alternative to Balanced Trees", modified in three ways:
+ * a) this implementation allows for repeated values.
+ * b) the comparison is not just by key (our 'score') but by satellite data.
+ * c) there is a back pointer, so it's a doubly linked list with the back
+ * pointers being only at "level 1". This allows to traverse the list
+ * from tail to head, useful for ZREVRANGE. */
+
+static zskiplistNode *zslCreateNode(int level, double score, robj *obj) {
+ zskiplistNode *zn = zmalloc(sizeof(*zn));
+
+ zn->forward = zmalloc(sizeof(zskiplistNode*) * level);
+ zn->score = score;
+ zn->obj = obj;
+ return zn;
+}
+
+static zskiplist *zslCreate(void) {
+ int j;
+ zskiplist *zsl;
+
+ zsl = zmalloc(sizeof(*zsl));
+ zsl->level = 1;
+ zsl->header = zslCreateNode(ZSKIPLIST_MAXLEVEL,0,NULL);
+ for (j = 0; j < ZSKIPLIST_MAXLEVEL; j++)
+ zsl->header->forward[j] = NULL;
+ return zsl;
+}
+
+static void zslFreeNode(zskiplistNode *node) {
+ decrRefCount(node->obj);
+ zfree(node);
+}
+
+static void zslFree(zskiplist *zsl) {
+ zskiplistNode *node = zsl->header->forward[1], *next;
+
+ while(node) {
+ next = node->forward[1];
+ zslFreeNode(node);
+ node = next;
+ }
+}
+
+static int zslRandomLevel(void) {
+ int level = 1;
+ while ((random()&0xFFFF) < (ZSKIPLIST_P * 0xFFFF))
+ level += 1;
+ return level;
+}
+
+static void zslInsert(zskiplist *zsl, double score, robj *obj) {
+ zskiplistNode *update[ZSKIPLIST_MAXLEVEL], *x;
+ int i, level;
+
+ x = zsl->header;
+ for (i = zsl->level-1; i >= 0; i--) {
+ while (x->forward[i] && x->forward[i]->score < score)
+ x = x->forward[i];
+ update[i] = x;
+ }
+ x = x->forward[1];
+ /* we assume the key is not already inside, since we allow duplicated
+ * scores, and the re-insertion of score and redis object should never
+ * happpen since the caller of zslInsert() should test in the hash table
+ * if the element is already inside or not. */
+ level = zslRandomLevel();
+ if (level > zsl->level) {
+ for (i = zsl->level; i < level; i++)
+ update[i] = zsl->header;
+ zsl->level = level;
+ }
+ x = zslCreateNode(level,score,obj);
+ for (i = 0; i < level; i++) {
+ x->forward[i] = update[i]->forward[i];
+ update[i]->forward[i] = x;
+ }
+}
+
+static int zslDelete(zskiplist *zsl, double score, robj *obj) {
+ return 1;
+}
+
+/* The actual Z-commands implementations */
+
+static void zaddCommand(redisClient *c) {
+ robj *zsetobj;
+ zset *zs;
+ double *score;
+
+ zsetobj = lookupKeyWrite(c->db,c->argv[1]);
+ if (zsetobj == NULL) {
+ zsetobj = createZsetObject();
+ dictAdd(c->db->dict,c->argv[1],zsetobj);
+ incrRefCount(c->argv[1]);
+ } else {
+ if (zsetobj->type != REDIS_ZSET) {
+ addReply(c,shared.wrongtypeerr);
+ return;
+ }
+ }
+ score = zmalloc(sizeof(double));
+ *score = strtod(c->argv[2]->ptr,NULL);
+ zs = zsetobj->ptr;
+ if (dictAdd(zs->dict,c->argv[3],score) == DICT_OK) {
+ /* case 1: New element */
+ incrRefCount(c->argv[3]); /* added to hash */
+ zslInsert(zs->zsl,*score,c->argv[3]);
+ incrRefCount(c->argv[3]); /* added to skiplist */
+ server.dirty++;
+ addReply(c,shared.cone);
+ } else {
+ dictEntry *de;
+ double *oldscore;
+
+ /* case 2: Score update operation */
+ de = dictFind(zs->dict,c->argv[3]);
+ assert(de != NULL);
+ oldscore = dictGetEntryVal(de);
+ if (*score != *oldscore) {
+ int deleted;
+
+ deleted = zslDelete(zs->zsl,*score,c->argv[3]);
+ assert(deleted != 0);
+ zslInsert(zs->zsl,*score,c->argv[3]);
+ incrRefCount(c->argv[3]);
+ server.dirty++;
+ }
+ addReply(c,shared.czero);
+ }
+}
+
+/* ========================= Non type-specific commands ==================== */
+
static void flushdbCommand(redisClient *c) {
- dictEmpty(c->dict);
+ server.dirty += dictSize(c->db->dict);
+ dictEmpty(c->db->dict);
+ dictEmpty(c->db->expires);
addReply(c,shared.ok);
- saveDb(server.dbfilename);
}
static void flushallCommand(redisClient *c) {
- emptyDb();
+ server.dirty += emptyDb();
addReply(c,shared.ok);
- saveDb(server.dbfilename);
+ rdbSave(server.dbfilename);
+ server.dirty++;
}
-redisSortOperation *createSortOperation(int type, robj *pattern) {
+static redisSortOperation *createSortOperation(int type, robj *pattern) {
redisSortOperation *so = zmalloc(sizeof(*so));
- if (!so) oom("createSortOperation");
so->type = type;
so->pattern = pattern;
return so;
/* Return the value associated to the key with a name obtained
* substituting the first occurence of '*' in 'pattern' with 'subst' */
-robj *lookupKeyByPattern(dict *dict, robj *pattern, robj *subst) {
+static robj *lookupKeyByPattern(redisDb *db, robj *pattern, robj *subst) {
char *p;
sds spat, ssub;
robj keyobj;
int prefixlen, sublen, postfixlen;
- dictEntry *de;
/* Expoit the internal sds representation to create a sds string allocated on the stack in order to make this function faster */
struct {
long len;
char buf[REDIS_SORTKEY_MAX+1];
} keyname;
+ if (subst->encoding == REDIS_ENCODING_RAW)
+ incrRefCount(subst);
+ else {
+ subst = getDecodedObject(subst);
+ }
spat = pattern->ptr;
ssub = subst->ptr;
keyobj.type = REDIS_STRING;
keyobj.ptr = ((char*)&keyname)+(sizeof(long)*2);
- de = dictFind(dict,&keyobj);
- // printf("lookup '%s' => %p\n", keyname.buf,de);
- if (!de) return NULL;
- return dictGetEntryVal(de);
+ decrRefCount(subst);
+
+ /* printf("lookup '%s' => %p\n", keyname.buf,de); */
+ return lookupKeyRead(db,&keyobj);
}
/* sortCompare() is used by qsort in sortCommand(). Given that qsort_r with
}
} else {
/* Compare elements directly */
- cmp = strcoll(so1->obj->ptr,so2->obj->ptr);
+ if (so1->obj->encoding == REDIS_ENCODING_RAW &&
+ so2->obj->encoding == REDIS_ENCODING_RAW) {
+ cmp = strcoll(so1->obj->ptr,so2->obj->ptr);
+ } else {
+ robj *dec1, *dec2;
+
+ dec1 = so1->obj->encoding == REDIS_ENCODING_RAW ?
+ so1->obj : getDecodedObject(so1->obj);
+ dec2 = so2->obj->encoding == REDIS_ENCODING_RAW ?
+ so2->obj : getDecodedObject(so2->obj);
+ cmp = strcoll(dec1->ptr,dec2->ptr);
+ if (dec1 != so1->obj) decrRefCount(dec1);
+ if (dec2 != so2->obj) decrRefCount(dec2);
+ }
}
}
return server.sort_desc ? -cmp : cmp;
/* The SORT command is the most complex command in Redis. Warning: this code
* is optimized for speed and a bit less for readability */
static void sortCommand(redisClient *c) {
- dictEntry *de;
list *operations;
int outputlen = 0;
int desc = 0, alpha = 0;
redisSortObject *vector; /* Resulting vector to sort */
/* Lookup the key to sort. It must be of the right types */
- de = dictFind(c->dict,c->argv[1]);
- if (de == NULL) {
+ sortval = lookupKeyRead(c->db,c->argv[1]);
+ if (sortval == NULL) {
addReply(c,shared.nokeyerr);
return;
}
- sortval = dictGetEntryVal(de);
if (sortval->type != REDIS_SET && sortval->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
/* Load the sorting vector with all the objects to sort */
vectorlen = (sortval->type == REDIS_LIST) ?
listLength((list*)sortval->ptr) :
- dictGetHashTableUsed((dict*)sortval->ptr);
+ dictSize((dict*)sortval->ptr);
vector = zmalloc(sizeof(redisSortObject)*vectorlen);
- if (!vector) oom("allocating objects vector for SORT");
j = 0;
if (sortval->type == REDIS_LIST) {
list *list = sortval->ptr;
- listNode *ln = list->head;
- while(ln) {
+ listNode *ln;
+
+ listRewind(list);
+ while((ln = listYield(list))) {
robj *ele = ln->value;
vector[j].obj = ele;
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
- ln = ln->next;
j++;
}
} else {
dictEntry *setele;
di = dictGetIterator(set);
- if (!di) oom("dictGetIterator");
while((setele = dictNext(di)) != NULL) {
vector[j].obj = dictGetEntryKey(setele);
vector[j].u.score = 0;
if (sortby) {
robj *byval;
- byval = lookupKeyByPattern(c->dict,sortby,vector[j].obj);
+ byval = lookupKeyByPattern(c->db,sortby,vector[j].obj);
if (!byval || byval->type != REDIS_STRING) continue;
if (alpha) {
- vector[j].u.cmpobj = byval;
- incrRefCount(byval);
+ if (byval->encoding == REDIS_ENCODING_RAW) {
+ vector[j].u.cmpobj = byval;
+ incrRefCount(byval);
+ } else {
+ vector[j].u.cmpobj = getDecodedObject(byval);
+ }
} else {
- vector[j].u.score = strtod(byval->ptr,NULL);
+ if (byval->encoding == REDIS_ENCODING_RAW) {
+ vector[j].u.score = strtod(byval->ptr,NULL);
+ } else {
+ if (byval->encoding == REDIS_ENCODING_INT) {
+ vector[j].u.score = (long)byval->ptr;
+ } else
+ assert(1 != 1);
+ }
}
} else {
- if (!alpha) vector[j].u.score = strtod(vector[j].obj->ptr,NULL);
+ if (!alpha) {
+ if (vector[j].obj->encoding == REDIS_ENCODING_RAW)
+ vector[j].u.score = strtod(vector[j].obj->ptr,NULL);
+ else {
+ if (vector[j].obj->encoding == REDIS_ENCODING_INT)
+ vector[j].u.score = (long) vector[j].obj->ptr;
+ else
+ assert(1 != 1);
+ }
+ }
}
}
}
server.sort_desc = desc;
server.sort_alpha = alpha;
server.sort_bypattern = sortby ? 1 : 0;
- qsort(vector,vectorlen,sizeof(redisSortObject),sortCompare);
+ if (sortby && (start != 0 || end != vectorlen-1))
+ pqsort(vector,vectorlen,sizeof(redisSortObject),sortCompare, start,end);
+ else
+ qsort(vector,vectorlen,sizeof(redisSortObject),sortCompare);
}
/* Send command output to the output buffer, performing the specified
outputlen = getop ? getop*(end-start+1) : end-start+1;
addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",outputlen));
for (j = start; j <= end; j++) {
- listNode *ln = operations->head;
+ listNode *ln;
if (!getop) {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",
- sdslen(vector[j].obj->ptr)));
+ addReplyBulkLen(c,vector[j].obj);
addReply(c,vector[j].obj);
addReply(c,shared.crlf);
}
- while(ln) {
+ listRewind(operations);
+ while((ln = listYield(operations))) {
redisSortOperation *sop = ln->value;
- robj *val = lookupKeyByPattern(c->dict,sop->pattern,
+ robj *val = lookupKeyByPattern(c->db,sop->pattern,
vector[j].obj);
if (sop->type == REDIS_SORT_GET) {
if (!val || val->type != REDIS_STRING) {
addReply(c,shared.nullbulk);
} else {
- addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",
- sdslen(val->ptr)));
+ addReplyBulkLen(c,val);
addReply(c,val);
addReply(c,shared.crlf);
}
} else if (sop->type == REDIS_SORT_DEL) {
/* TODO */
}
- ln = ln->next;
}
}
static void infoCommand(redisClient *c) {
sds info;
time_t uptime = time(NULL)-server.stat_starttime;
+ int j;
info = sdscatprintf(sdsempty(),
"redis_version:%s\r\n"
+ "arch_bits:%s\r\n"
+ "uptime_in_seconds:%d\r\n"
+ "uptime_in_days:%d\r\n"
"connected_clients:%d\r\n"
"connected_slaves:%d\r\n"
- "used_memory:%d\r\n"
+ "used_memory:%zu\r\n"
"changes_since_last_save:%lld\r\n"
+ "bgsave_in_progress:%d\r\n"
"last_save_time:%d\r\n"
"total_connections_received:%lld\r\n"
"total_commands_processed:%lld\r\n"
- "uptime_in_seconds:%d\r\n"
- "uptime_in_days:%d\r\n"
+ "role:%s\r\n"
,REDIS_VERSION,
+ (sizeof(long) == 8) ? "64" : "32",
+ uptime,
+ uptime/(3600*24),
listLength(server.clients)-listLength(server.slaves),
listLength(server.slaves),
server.usedmemory,
server.dirty,
+ server.bgsaveinprogress,
server.lastsave,
server.stat_numconnections,
server.stat_numcommands,
- uptime,
- uptime/(3600*24)
+ server.masterhost == NULL ? "master" : "slave"
);
+ if (server.masterhost) {
+ info = sdscatprintf(info,
+ "master_host:%s\r\n"
+ "master_port:%d\r\n"
+ "master_link_status:%s\r\n"
+ "master_last_io_seconds_ago:%d\r\n"
+ ,server.masterhost,
+ server.masterport,
+ (server.replstate == REDIS_REPL_CONNECTED) ?
+ "up" : "down",
+ (int)(time(NULL)-server.master->lastinteraction)
+ );
+ }
+ for (j = 0; j < server.dbnum; j++) {
+ long long keys, vkeys;
+
+ keys = dictSize(server.db[j].dict);
+ vkeys = dictSize(server.db[j].expires);
+ if (keys || vkeys) {
+ info = sdscatprintf(info, "db%d: keys=%lld,expires=%lld\r\n",
+ j, keys, vkeys);
+ }
+ }
addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n",sdslen(info)));
addReplySds(c,info);
addReply(c,shared.crlf);
}
-/* =============================== Replication ============================= */
+static void monitorCommand(redisClient *c) {
+ /* ignore MONITOR if aleady slave or in monitor mode */
+ if (c->flags & REDIS_SLAVE) return;
-/* Send the whole output buffer syncronously to the slave. This a general operation in theory, but it is actually useful only for replication. */
-static int flushClientOutput(redisClient *c) {
- int retval;
- time_t start = time(NULL);
+ c->flags |= (REDIS_SLAVE|REDIS_MONITOR);
+ c->slaveseldb = 0;
+ listAddNodeTail(server.monitors,c);
+ addReply(c,shared.ok);
+}
- while(listLength(c->reply)) {
- if (time(NULL)-start > 5) return REDIS_ERR; /* 5 seconds timeout */
- retval = aeWait(c->fd,AE_WRITABLE,1000);
- if (retval == -1) {
- return REDIS_ERR;
- } else if (retval & AE_WRITABLE) {
- sendReplyToClient(NULL, c->fd, c, AE_WRITABLE);
+/* ================================= Expire ================================= */
+static int removeExpire(redisDb *db, robj *key) {
+ if (dictDelete(db->expires,key) == DICT_OK) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static int setExpire(redisDb *db, robj *key, time_t when) {
+ if (dictAdd(db->expires,key,(void*)when) == DICT_ERR) {
+ return 0;
+ } else {
+ incrRefCount(key);
+ return 1;
+ }
+}
+
+/* Return the expire time of the specified key, or -1 if no expire
+ * is associated with this key (i.e. the key is non volatile) */
+static time_t getExpire(redisDb *db, robj *key) {
+ dictEntry *de;
+
+ /* No expire? return ASAP */
+ if (dictSize(db->expires) == 0 ||
+ (de = dictFind(db->expires,key)) == NULL) return -1;
+
+ return (time_t) dictGetEntryVal(de);
+}
+
+static int expireIfNeeded(redisDb *db, robj *key) {
+ time_t when;
+ dictEntry *de;
+
+ /* No expire? return ASAP */
+ if (dictSize(db->expires) == 0 ||
+ (de = dictFind(db->expires,key)) == NULL) return 0;
+
+ /* Lookup the expire */
+ when = (time_t) dictGetEntryVal(de);
+ if (time(NULL) <= when) return 0;
+
+ /* Delete the key */
+ dictDelete(db->expires,key);
+ return dictDelete(db->dict,key) == DICT_OK;
+}
+
+static int deleteIfVolatile(redisDb *db, robj *key) {
+ dictEntry *de;
+
+ /* No expire? return ASAP */
+ if (dictSize(db->expires) == 0 ||
+ (de = dictFind(db->expires,key)) == NULL) return 0;
+
+ /* Delete the key */
+ server.dirty++;
+ dictDelete(db->expires,key);
+ return dictDelete(db->dict,key) == DICT_OK;
+}
+
+static void expireCommand(redisClient *c) {
+ dictEntry *de;
+ int seconds = atoi(c->argv[2]->ptr);
+
+ de = dictFind(c->db->dict,c->argv[1]);
+ if (de == NULL) {
+ addReply(c,shared.czero);
+ return;
+ }
+ if (seconds <= 0) {
+ addReply(c, shared.czero);
+ return;
+ } else {
+ time_t when = time(NULL)+seconds;
+ if (setExpire(c->db,c->argv[1],when)) {
+ addReply(c,shared.cone);
+ server.dirty++;
+ } else {
+ addReply(c,shared.czero);
}
+ return;
}
- return REDIS_OK;
}
-static int syncWrite(int fd, void *ptr, ssize_t size, int timeout) {
+static void ttlCommand(redisClient *c) {
+ time_t expire;
+ int ttl = -1;
+
+ expire = getExpire(c->db,c->argv[1]);
+ if (expire != -1) {
+ ttl = (int) (expire-time(NULL));
+ if (ttl < 0) ttl = -1;
+ }
+ addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",ttl));
+}
+
+static void msetGenericCommand(redisClient *c, int nx) {
+ int j;
+
+ if ((c->argc % 2) == 0) {
+ addReplySds(c,sdsnew("-ERR wrong number of arguments\r\n"));
+ return;
+ }
+ /* Handle the NX flag. The MSETNX semantic is to return zero and don't
+ * set nothing at all if at least one already key exists. */
+ if (nx) {
+ for (j = 1; j < c->argc; j += 2) {
+ if (dictFind(c->db->dict,c->argv[j]) != NULL) {
+ addReply(c, shared.czero);
+ return;
+ }
+ }
+ }
+
+ for (j = 1; j < c->argc; j += 2) {
+ int retval;
+
+ retval = dictAdd(c->db->dict,c->argv[j],c->argv[j+1]);
+ if (retval == DICT_ERR) {
+ dictReplace(c->db->dict,c->argv[j],c->argv[j+1]);
+ incrRefCount(c->argv[j+1]);
+ } else {
+ incrRefCount(c->argv[j]);
+ incrRefCount(c->argv[j+1]);
+ }
+ removeExpire(c->db,c->argv[j]);
+ }
+ server.dirty += (c->argc-1)/2;
+ addReply(c, nx ? shared.cone : shared.ok);
+}
+
+static void msetCommand(redisClient *c) {
+ msetGenericCommand(c,0);
+}
+
+static void msetnxCommand(redisClient *c) {
+ msetGenericCommand(c,1);
+}
+
+/* =============================== Replication ============================= */
+
+static int syncWrite(int fd, char *ptr, ssize_t size, int timeout) {
ssize_t nwritten, ret = size;
time_t start = time(NULL);
return ret;
}
-static int syncRead(int fd, void *ptr, ssize_t size, int timeout) {
+static int syncRead(int fd, char *ptr, ssize_t size, int timeout) {
ssize_t nread, totread = 0;
time_t start = time(NULL);
}
static void syncCommand(redisClient *c) {
- struct stat sb;
- int fd = -1, len;
- time_t start = time(NULL);
- char sizebuf[32];
-
/* ignore SYNC if aleady slave or in monitor mode */
if (c->flags & REDIS_SLAVE) return;
- redisLog(REDIS_NOTICE,"Slave ask for syncronization");
- if (flushClientOutput(c) == REDIS_ERR || saveDb(server.dbfilename) != REDIS_OK)
- goto closeconn;
-
- fd = open(server.dbfilename, O_RDONLY);
- if (fd == -1 || fstat(fd,&sb) == -1) goto closeconn;
- len = sb.st_size;
-
- snprintf(sizebuf,32,"$%d\r\n",len);
- if (syncWrite(c->fd,sizebuf,strlen(sizebuf),5) == -1) goto closeconn;
- while(len) {
- char buf[1024];
- int nread;
+ /* SYNC can't be issued when the server has pending data to send to
+ * the client about already issued commands. We need a fresh reply
+ * buffer registering the differences between the BGSAVE and the current
+ * dataset, so that we can copy to other slaves if needed. */
+ if (listLength(c->reply) != 0) {
+ addReplySds(c,sdsnew("-ERR SYNC is invalid with pending input\r\n"));
+ return;
+ }
- if (time(NULL)-start > REDIS_MAX_SYNC_TIME) goto closeconn;
- nread = read(fd,buf,1024);
- if (nread == -1) goto closeconn;
- len -= nread;
- if (syncWrite(c->fd,buf,nread,5) == -1) goto closeconn;
+ redisLog(REDIS_NOTICE,"Slave ask for synchronization");
+ /* Here we need to check if there is a background saving operation
+ * in progress, or if it is required to start one */
+ if (server.bgsaveinprogress) {
+ /* Ok a background save is in progress. Let's check if it is a good
+ * one for replication, i.e. if there is another slave that is
+ * registering differences since the server forked to save */
+ redisClient *slave;
+ listNode *ln;
+
+ listRewind(server.slaves);
+ while((ln = listYield(server.slaves))) {
+ slave = ln->value;
+ if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_END) break;
+ }
+ if (ln) {
+ /* Perfect, the server is already registering differences for
+ * another slave. Set the right state, and copy the buffer. */
+ listRelease(c->reply);
+ c->reply = listDup(slave->reply);
+ c->replstate = REDIS_REPL_WAIT_BGSAVE_END;
+ redisLog(REDIS_NOTICE,"Waiting for end of BGSAVE for SYNC");
+ } else {
+ /* No way, we need to wait for the next BGSAVE in order to
+ * register differences */
+ c->replstate = REDIS_REPL_WAIT_BGSAVE_START;
+ redisLog(REDIS_NOTICE,"Waiting for next BGSAVE for SYNC");
+ }
+ } else {
+ /* Ok we don't have a BGSAVE in progress, let's start one */
+ redisLog(REDIS_NOTICE,"Starting BGSAVE for SYNC");
+ if (rdbSaveBackground(server.dbfilename) != REDIS_OK) {
+ redisLog(REDIS_NOTICE,"Replication failed, can't BGSAVE");
+ addReplySds(c,sdsnew("-ERR Unalbe to perform background save\r\n"));
+ return;
+ }
+ c->replstate = REDIS_REPL_WAIT_BGSAVE_END;
}
- if (syncWrite(c->fd,"\r\n",2,5) == -1) goto closeconn;
- close(fd);
+ c->repldbfd = -1;
c->flags |= REDIS_SLAVE;
c->slaveseldb = 0;
- if (!listAddNodeTail(server.slaves,c)) oom("listAddNodeTail");
- redisLog(REDIS_NOTICE,"Syncronization with slave succeeded");
+ listAddNodeTail(server.slaves,c);
return;
+}
-closeconn:
- if (fd != -1) close(fd);
- c->flags |= REDIS_CLOSE;
- redisLog(REDIS_WARNING,"Syncronization with slave failed");
- return;
+static void sendBulkToSlave(aeEventLoop *el, int fd, void *privdata, int mask) {
+ redisClient *slave = privdata;
+ REDIS_NOTUSED(el);
+ REDIS_NOTUSED(mask);
+ char buf[REDIS_IOBUF_LEN];
+ ssize_t nwritten, buflen;
+
+ if (slave->repldboff == 0) {
+ /* Write the bulk write count before to transfer the DB. In theory here
+ * we don't know how much room there is in the output buffer of the
+ * socket, but in pratice SO_SNDLOWAT (the minimum count for output
+ * operations) will never be smaller than the few bytes we need. */
+ sds bulkcount;
+
+ bulkcount = sdscatprintf(sdsempty(),"$%lld\r\n",(unsigned long long)
+ slave->repldbsize);
+ if (write(fd,bulkcount,sdslen(bulkcount)) != (signed)sdslen(bulkcount))
+ {
+ sdsfree(bulkcount);
+ freeClient(slave);
+ return;
+ }
+ sdsfree(bulkcount);
+ }
+ lseek(slave->repldbfd,slave->repldboff,SEEK_SET);
+ buflen = read(slave->repldbfd,buf,REDIS_IOBUF_LEN);
+ if (buflen <= 0) {
+ redisLog(REDIS_WARNING,"Read error sending DB to slave: %s",
+ (buflen == 0) ? "premature EOF" : strerror(errno));
+ freeClient(slave);
+ return;
+ }
+ if ((nwritten = write(fd,buf,buflen)) == -1) {
+ redisLog(REDIS_DEBUG,"Write error sending DB to slave: %s",
+ strerror(errno));
+ freeClient(slave);
+ return;
+ }
+ slave->repldboff += nwritten;
+ if (slave->repldboff == slave->repldbsize) {
+ close(slave->repldbfd);
+ slave->repldbfd = -1;
+ aeDeleteFileEvent(server.el,slave->fd,AE_WRITABLE);
+ slave->replstate = REDIS_REPL_ONLINE;
+ if (aeCreateFileEvent(server.el, slave->fd, AE_WRITABLE,
+ sendReplyToClient, slave, NULL) == AE_ERR) {
+ freeClient(slave);
+ return;
+ }
+ addReplySds(slave,sdsempty());
+ redisLog(REDIS_NOTICE,"Synchronization with slave succeeded");
+ }
+}
+
+/* This function is called at the end of every backgrond saving.
+ * The argument bgsaveerr is REDIS_OK if the background saving succeeded
+ * otherwise REDIS_ERR is passed to the function.
+ *
+ * The goal of this function is to handle slaves waiting for a successful
+ * background saving in order to perform non-blocking synchronization. */
+static void updateSlavesWaitingBgsave(int bgsaveerr) {
+ listNode *ln;
+ int startbgsave = 0;
+
+ listRewind(server.slaves);
+ while((ln = listYield(server.slaves))) {
+ redisClient *slave = ln->value;
+
+ if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_START) {
+ startbgsave = 1;
+ slave->replstate = REDIS_REPL_WAIT_BGSAVE_END;
+ } else if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_END) {
+ struct redis_stat buf;
+
+ if (bgsaveerr != REDIS_OK) {
+ freeClient(slave);
+ redisLog(REDIS_WARNING,"SYNC failed. BGSAVE child returned an error");
+ continue;
+ }
+ if ((slave->repldbfd = open(server.dbfilename,O_RDONLY)) == -1 ||
+ redis_fstat(slave->repldbfd,&buf) == -1) {
+ freeClient(slave);
+ redisLog(REDIS_WARNING,"SYNC failed. Can't open/stat DB after BGSAVE: %s", strerror(errno));
+ continue;
+ }
+ slave->repldboff = 0;
+ slave->repldbsize = buf.st_size;
+ slave->replstate = REDIS_REPL_SEND_BULK;
+ aeDeleteFileEvent(server.el,slave->fd,AE_WRITABLE);
+ if (aeCreateFileEvent(server.el, slave->fd, AE_WRITABLE, sendBulkToSlave, slave, NULL) == AE_ERR) {
+ freeClient(slave);
+ continue;
+ }
+ }
+ }
+ if (startbgsave) {
+ if (rdbSaveBackground(server.dbfilename) != REDIS_OK) {
+ listRewind(server.slaves);
+ redisLog(REDIS_WARNING,"SYNC failed. BGSAVE failed");
+ while((ln = listYield(server.slaves))) {
+ redisClient *slave = ln->value;
+
+ if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_START)
+ freeClient(slave);
+ }
+ }
+ }
}
static int syncWithMaster(void) {
return REDIS_ERR;
}
/* Read the bulk write count */
- if (syncReadLine(fd,buf,1024,5) == -1) {
+ if (syncReadLine(fd,buf,1024,3600) == -1) {
close(fd);
redisLog(REDIS_WARNING,"I/O error reading bulk count from MASTER: %s",
strerror(errno));
return REDIS_ERR;
}
emptyDb();
- if (loadDb(server.dbfilename) != REDIS_OK) {
+ if (rdbLoad(server.dbfilename) != REDIS_OK) {
redisLog(REDIS_WARNING,"Failed trying to load the MASTER synchronization DB from disk");
close(fd);
return REDIS_ERR;
return REDIS_OK;
}
-static void monitorCommand(redisClient *c) {
- /* ignore MONITOR if aleady slave or in monitor mode */
- if (c->flags & REDIS_SLAVE) return;
-
- c->flags |= (REDIS_SLAVE|REDIS_MONITOR);
- c->slaveseldb = 0;
- if (!listAddNodeTail(server.monitors,c)) oom("listAddNodeTail");
+static void slaveofCommand(redisClient *c) {
+ if (!strcasecmp(c->argv[1]->ptr,"no") &&
+ !strcasecmp(c->argv[2]->ptr,"one")) {
+ if (server.masterhost) {
+ sdsfree(server.masterhost);
+ server.masterhost = NULL;
+ if (server.master) freeClient(server.master);
+ server.replstate = REDIS_REPL_NONE;
+ redisLog(REDIS_NOTICE,"MASTER MODE enabled (user request)");
+ }
+ } else {
+ sdsfree(server.masterhost);
+ server.masterhost = sdsdup(c->argv[1]->ptr);
+ server.masterport = atoi(c->argv[2]->ptr);
+ if (server.master) freeClient(server.master);
+ server.replstate = REDIS_REPL_CONNECT;
+ redisLog(REDIS_NOTICE,"SLAVE OF %s:%d enabled (user request)",
+ server.masterhost, server.masterport);
+ }
addReply(c,shared.ok);
}
+/* ============================ Maxmemory directive ======================== */
+
+/* This function gets called when 'maxmemory' is set on the config file to limit
+ * the max memory used by the server, and we are out of memory.
+ * This function will try to, in order:
+ *
+ * - Free objects from the free list
+ * - Try to remove keys with an EXPIRE set
+ *
+ * It is not possible to free enough memory to reach used-memory < maxmemory
+ * the server will start refusing commands that will enlarge even more the
+ * memory usage.
+ */
+static void freeMemoryIfNeeded(void) {
+ while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) {
+ if (listLength(server.objfreelist)) {
+ robj *o;
+
+ listNode *head = listFirst(server.objfreelist);
+ o = listNodeValue(head);
+ listDelNode(server.objfreelist,head);
+ zfree(o);
+ } else {
+ int j, k, freed = 0;
+
+ for (j = 0; j < server.dbnum; j++) {
+ int minttl = -1;
+ robj *minkey = NULL;
+ struct dictEntry *de;
+
+ if (dictSize(server.db[j].expires)) {
+ freed = 1;
+ /* From a sample of three keys drop the one nearest to
+ * the natural expire */
+ for (k = 0; k < 3; k++) {
+ time_t t;
+
+ de = dictGetRandomKey(server.db[j].expires);
+ t = (time_t) dictGetEntryVal(de);
+ if (minttl == -1 || t < minttl) {
+ minkey = dictGetEntryKey(de);
+ minttl = t;
+ }
+ }
+ deleteKey(server.db+j,minkey);
+ }
+ }
+ if (!freed) return; /* nothing to free... */
+ }
+ }
+}
+
+/* ================================= Debugging ============================== */
+
+static void debugCommand(redisClient *c) {
+ if (!strcasecmp(c->argv[1]->ptr,"segfault")) {
+ *((char*)-1) = 'x';
+ } else if (!strcasecmp(c->argv[1]->ptr,"object") && c->argc == 3) {
+ dictEntry *de = dictFind(c->db->dict,c->argv[2]);
+ robj *key, *val;
+
+ if (!de) {
+ addReply(c,shared.nokeyerr);
+ return;
+ }
+ key = dictGetEntryKey(de);
+ val = dictGetEntryVal(de);
+ addReplySds(c,sdscatprintf(sdsempty(),
+ "+Key at:%p refcount:%d, value at:%p refcount:%d encoding:%d\r\n",
+ key, key->refcount, val, val->refcount, val->encoding));
+ } else {
+ addReplySds(c,sdsnew(
+ "-ERR Syntax error, try DEBUG [SEGFAULT|OBJECT <key>]\r\n"));
+ }
+}
+
+#ifdef HAVE_BACKTRACE
+static struct redisFunctionSym symsTable[] = {
+{"compareStringObjects", (unsigned long)compareStringObjects},
+{"isStringRepresentableAsLong", (unsigned long)isStringRepresentableAsLong},
+{"dictEncObjKeyCompare", (unsigned long)dictEncObjKeyCompare},
+{"dictEncObjHash", (unsigned long)dictEncObjHash},
+{"incrDecrCommand", (unsigned long)incrDecrCommand},
+{"freeStringObject", (unsigned long)freeStringObject},
+{"freeListObject", (unsigned long)freeListObject},
+{"freeSetObject", (unsigned long)freeSetObject},
+{"decrRefCount", (unsigned long)decrRefCount},
+{"createObject", (unsigned long)createObject},
+{"freeClient", (unsigned long)freeClient},
+{"rdbLoad", (unsigned long)rdbLoad},
+{"rdbSaveStringObject", (unsigned long)rdbSaveStringObject},
+{"rdbSaveStringObjectRaw", (unsigned long)rdbSaveStringObjectRaw},
+{"addReply", (unsigned long)addReply},
+{"addReplySds", (unsigned long)addReplySds},
+{"incrRefCount", (unsigned long)incrRefCount},
+{"rdbSaveBackground", (unsigned long)rdbSaveBackground},
+{"createStringObject", (unsigned long)createStringObject},
+{"replicationFeedSlaves", (unsigned long)replicationFeedSlaves},
+{"syncWithMaster", (unsigned long)syncWithMaster},
+{"tryObjectSharing", (unsigned long)tryObjectSharing},
+{"tryObjectEncoding", (unsigned long)tryObjectEncoding},
+{"getDecodedObject", (unsigned long)getDecodedObject},
+{"removeExpire", (unsigned long)removeExpire},
+{"expireIfNeeded", (unsigned long)expireIfNeeded},
+{"deleteIfVolatile", (unsigned long)deleteIfVolatile},
+{"deleteKey", (unsigned long)deleteKey},
+{"getExpire", (unsigned long)getExpire},
+{"setExpire", (unsigned long)setExpire},
+{"updateSlavesWaitingBgsave", (unsigned long)updateSlavesWaitingBgsave},
+{"freeMemoryIfNeeded", (unsigned long)freeMemoryIfNeeded},
+{"authCommand", (unsigned long)authCommand},
+{"pingCommand", (unsigned long)pingCommand},
+{"echoCommand", (unsigned long)echoCommand},
+{"setCommand", (unsigned long)setCommand},
+{"setnxCommand", (unsigned long)setnxCommand},
+{"getCommand", (unsigned long)getCommand},
+{"delCommand", (unsigned long)delCommand},
+{"existsCommand", (unsigned long)existsCommand},
+{"incrCommand", (unsigned long)incrCommand},
+{"decrCommand", (unsigned long)decrCommand},
+{"incrbyCommand", (unsigned long)incrbyCommand},
+{"decrbyCommand", (unsigned long)decrbyCommand},
+{"selectCommand", (unsigned long)selectCommand},
+{"randomkeyCommand", (unsigned long)randomkeyCommand},
+{"keysCommand", (unsigned long)keysCommand},
+{"dbsizeCommand", (unsigned long)dbsizeCommand},
+{"lastsaveCommand", (unsigned long)lastsaveCommand},
+{"saveCommand", (unsigned long)saveCommand},
+{"bgsaveCommand", (unsigned long)bgsaveCommand},
+{"shutdownCommand", (unsigned long)shutdownCommand},
+{"moveCommand", (unsigned long)moveCommand},
+{"renameCommand", (unsigned long)renameCommand},
+{"renamenxCommand", (unsigned long)renamenxCommand},
+{"lpushCommand", (unsigned long)lpushCommand},
+{"rpushCommand", (unsigned long)rpushCommand},
+{"lpopCommand", (unsigned long)lpopCommand},
+{"rpopCommand", (unsigned long)rpopCommand},
+{"llenCommand", (unsigned long)llenCommand},
+{"lindexCommand", (unsigned long)lindexCommand},
+{"lrangeCommand", (unsigned long)lrangeCommand},
+{"ltrimCommand", (unsigned long)ltrimCommand},
+{"typeCommand", (unsigned long)typeCommand},
+{"lsetCommand", (unsigned long)lsetCommand},
+{"saddCommand", (unsigned long)saddCommand},
+{"sremCommand", (unsigned long)sremCommand},
+{"smoveCommand", (unsigned long)smoveCommand},
+{"sismemberCommand", (unsigned long)sismemberCommand},
+{"scardCommand", (unsigned long)scardCommand},
+{"spopCommand", (unsigned long)spopCommand},
+{"srandmemberCommand", (unsigned long)srandmemberCommand},
+{"sinterCommand", (unsigned long)sinterCommand},
+{"sinterstoreCommand", (unsigned long)sinterstoreCommand},
+{"sunionCommand", (unsigned long)sunionCommand},
+{"sunionstoreCommand", (unsigned long)sunionstoreCommand},
+{"sdiffCommand", (unsigned long)sdiffCommand},
+{"sdiffstoreCommand", (unsigned long)sdiffstoreCommand},
+{"syncCommand", (unsigned long)syncCommand},
+{"flushdbCommand", (unsigned long)flushdbCommand},
+{"flushallCommand", (unsigned long)flushallCommand},
+{"sortCommand", (unsigned long)sortCommand},
+{"lremCommand", (unsigned long)lremCommand},
+{"infoCommand", (unsigned long)infoCommand},
+{"mgetCommand", (unsigned long)mgetCommand},
+{"monitorCommand", (unsigned long)monitorCommand},
+{"expireCommand", (unsigned long)expireCommand},
+{"getsetCommand", (unsigned long)getsetCommand},
+{"ttlCommand", (unsigned long)ttlCommand},
+{"slaveofCommand", (unsigned long)slaveofCommand},
+{"debugCommand", (unsigned long)debugCommand},
+{"processCommand", (unsigned long)processCommand},
+{"setupSigSegvAction", (unsigned long)setupSigSegvAction},
+{"readQueryFromClient", (unsigned long)readQueryFromClient},
+{"rdbRemoveTempFile", (unsigned long)rdbRemoveTempFile},
+{"msetGenericCommand", (unsigned long)msetGenericCommand},
+{"msetCommand", (unsigned long)msetCommand},
+{"msetnxCommand", (unsigned long)msetnxCommand},
+{"zslCreateNode", (unsigned long)zslCreateNode},
+{"zslCreate", (unsigned long)zslCreate},
+{"zslFreeNode",(unsigned long)zslFreeNode},
+{"zslFree",(unsigned long)zslFree},
+{"zslRandomLevel",(unsigned long)zslRandomLevel},
+{"zslInsert",(unsigned long)zslInsert},
+{"zslDelete",(unsigned long)zslDelete},
+{"createZsetObject",(unsigned long)createZsetObject},
+{"zaddCommand",(unsigned long)zaddCommand},
+{NULL,0}
+};
+
+/* This function try to convert a pointer into a function name. It's used in
+ * oreder to provide a backtrace under segmentation fault that's able to
+ * display functions declared as static (otherwise the backtrace is useless). */
+static char *findFuncName(void *pointer, unsigned long *offset){
+ int i, ret = -1;
+ unsigned long off, minoff = 0;
+
+ /* Try to match against the Symbol with the smallest offset */
+ for (i=0; symsTable[i].pointer; i++) {
+ unsigned long lp = (unsigned long) pointer;
+
+ if (lp != (unsigned long)-1 && lp >= symsTable[i].pointer) {
+ off=lp-symsTable[i].pointer;
+ if (ret < 0 || off < minoff) {
+ minoff=off;
+ ret=i;
+ }
+ }
+ }
+ if (ret == -1) return NULL;
+ *offset = minoff;
+ return symsTable[ret].name;
+}
+
+static void *getMcontextEip(ucontext_t *uc) {
+#if defined(__FreeBSD__)
+ return (void*) uc->uc_mcontext.mc_eip;
+#elif defined(__dietlibc__)
+ return (void*) uc->uc_mcontext.eip;
+#elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
+ return (void*) uc->uc_mcontext->__ss.__eip;
+#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6)
+ #if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__)
+ return (void*) uc->uc_mcontext->__ss.__rip;
+ #else
+ return (void*) uc->uc_mcontext->__ss.__eip;
+ #endif
+#elif defined(__i386__) || defined(__X86_64__) /* Linux x86 */
+ return (void*) uc->uc_mcontext.gregs[REG_EIP];
+#elif defined(__ia64__) /* Linux IA64 */
+ return (void*) uc->uc_mcontext.sc_ip;
+#else
+ return NULL;
+#endif
+}
+
+static void segvHandler(int sig, siginfo_t *info, void *secret) {
+ void *trace[100];
+ char **messages = NULL;
+ int i, trace_size = 0;
+ unsigned long offset=0;
+ time_t uptime = time(NULL)-server.stat_starttime;
+ ucontext_t *uc = (ucontext_t*) secret;
+ REDIS_NOTUSED(info);
+
+ redisLog(REDIS_WARNING,
+ "======= Ooops! Redis %s got signal: -%d- =======", REDIS_VERSION, sig);
+ redisLog(REDIS_WARNING, "%s", sdscatprintf(sdsempty(),
+ "redis_version:%s; "
+ "uptime_in_seconds:%d; "
+ "connected_clients:%d; "
+ "connected_slaves:%d; "
+ "used_memory:%zu; "
+ "changes_since_last_save:%lld; "
+ "bgsave_in_progress:%d; "
+ "last_save_time:%d; "
+ "total_connections_received:%lld; "
+ "total_commands_processed:%lld; "
+ "role:%s;"
+ ,REDIS_VERSION,
+ uptime,
+ listLength(server.clients)-listLength(server.slaves),
+ listLength(server.slaves),
+ server.usedmemory,
+ server.dirty,
+ server.bgsaveinprogress,
+ server.lastsave,
+ server.stat_numconnections,
+ server.stat_numcommands,
+ server.masterhost == NULL ? "master" : "slave"
+ ));
+
+ trace_size = backtrace(trace, 100);
+ /* overwrite sigaction with caller's address */
+ if (getMcontextEip(uc) != NULL) {
+ trace[1] = getMcontextEip(uc);
+ }
+ messages = backtrace_symbols(trace, trace_size);
+
+ for (i=1; i<trace_size; ++i) {
+ char *fn = findFuncName(trace[i], &offset), *p;
+
+ p = strchr(messages[i],'+');
+ if (!fn || (p && ((unsigned long)strtol(p+1,NULL,10)) < offset)) {
+ redisLog(REDIS_WARNING,"%s", messages[i]);
+ } else {
+ redisLog(REDIS_WARNING,"%d redis-server %p %s + %d", i, trace[i], fn, (unsigned int)offset);
+ }
+ }
+ free(messages);
+ exit(0);
+}
+
+static void setupSigSegvAction(void) {
+ struct sigaction act;
+
+ sigemptyset (&act.sa_mask);
+ /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
+ * is used. Otherwise, sa_handler is used */
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
+ act.sa_sigaction = segvHandler;
+ sigaction (SIGSEGV, &act, NULL);
+ sigaction (SIGBUS, &act, NULL);
+ sigaction (SIGFPE, &act, NULL);
+ sigaction (SIGILL, &act, NULL);
+ sigaction (SIGBUS, &act, NULL);
+ return;
+}
+#else /* HAVE_BACKTRACE */
+static void setupSigSegvAction(void) {
+}
+#endif /* HAVE_BACKTRACE */
+
/* =================================== Main! ================================ */
+#ifdef __linux__
+int linuxOvercommitMemoryValue(void) {
+ FILE *fp = fopen("/proc/sys/vm/overcommit_memory","r");
+ char buf[64];
+
+ if (!fp) return -1;
+ if (fgets(buf,64,fp) == NULL) {
+ fclose(fp);
+ return -1;
+ }
+ fclose(fp);
+
+ return atoi(buf);
+}
+
+void linuxOvercommitMemoryWarning(void) {
+ if (linuxOvercommitMemoryValue() == 0) {
+ redisLog(REDIS_WARNING,"WARNING overcommit_memory is set to 0! Background save may fail under low condition memory. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.");
+ }
+}
+#endif /* __linux__ */
+
static void daemonize(void) {
int fd;
FILE *fp;
} else if (argc > 2) {
fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n");
exit(1);
+ } else {
+ redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'");
}
initServer();
if (server.daemonize) daemonize();
redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
- if (loadDb(server.dbfilename) == REDIS_OK)
+#ifdef __linux__
+ linuxOvercommitMemoryWarning();
+#endif
+ if (rdbLoad(server.dbfilename) == REDIS_OK)
redisLog(REDIS_NOTICE,"DB loaded from disk");
if (aeCreateFileEvent(server.el, server.fd, AE_READABLE,
acceptHandler, NULL, NULL) == AE_ERR) oom("creating file event");
projects / redis.git / blobdiff