X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/4a7893ca9ce334f2a144faa96ef02113bef4b2b2..4ebfc45528dea7a3b0e4bc2a8efd4238ea48347b:/src/redis.h diff --git a/src/redis.h b/src/redis.h index ea05fcd0..043825af 100644 --- a/src/redis.h +++ b/src/redis.h @@ -41,21 +41,12 @@ #define REDIS_STATIC_ARGS 8 #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 10 /* lookup 10 expires per loop */ #define REDIS_MAX_WRITE_PER_EVENT (1024*64) #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */ #define REDIS_SHARED_INTEGERS 10000 - -/* Size of a reply chunk, configured to exactly allocate 4k bytes */ -#define REDIS_REPLY_CHUNK_BYTES (4*1024) -#define REDIS_REPLY_CHUNK_SIZE (REDIS_REPLY_CHUNK_BYTES-sizeof(struct sdshdr)-1-sizeof(size_t)) -/* It doesn't make sense to memcpy objects to a chunk when the net result is - * not being able to glue other objects. We want to make sure it can be glued - * to at least a bulk length or \r\n, so set the threshold to be a couple - * of bytes less than the size of the buffer. */ -#define REDIS_REPLY_CHUNK_THRESHOLD (REDIS_REPLY_CHUNK_SIZE-16) +#define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */ /* If more then REDIS_WRITEV_THRESHOLD write packets are pending use writev */ #define REDIS_WRITEV_THRESHOLD 3 @@ -65,15 +56,15 @@ /* Hash table parameters */ #define REDIS_HT_MINFILL 10 /* Minimal hash table fill 10% */ -/* Command flags */ -#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 -#define REDIS_CMD_FORCE_REPLICATION 8 /* Force replication even if dirty is 0 */ +/* Command flags: + * REDIS_CMD_DENYOOM: + * Commands marked with this flag will return an error when 'maxmemory' is + * set and the server is using more than 'maxmemory' bytes of memory. + * In short: commands with this flag are denied on low memory conditions. + * REDIS_CMD_FORCE_REPLICATION: + * Force replication even if dirty is 0. */ +#define REDIS_CMD_DENYOOM 4 +#define REDIS_CMD_FORCE_REPLICATION 8 /* Object types */ #define REDIS_STRING 0 @@ -81,7 +72,6 @@ #define REDIS_SET 2 #define REDIS_ZSET 3 #define REDIS_HASH 4 -#define REDIS_REPLY_NODE 5 #define REDIS_VMPOINTER 8 /* Objects encoding. Some kind of objects like Strings and Hashes can be @@ -153,11 +143,17 @@ #define REDIS_BLOCKED 16 /* The client is waiting in a blocking operation */ #define REDIS_IO_WAIT 32 /* The client is waiting for Virtual Memory I/O */ #define REDIS_DIRTY_CAS 64 /* Watched keys modified. EXEC will fail. */ +#define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */ + +/* Client request types */ +#define REDIS_REQ_INLINE 1 +#define REDIS_REQ_MULTIBULK 2 /* 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 */ +#define REDIS_REPL_TRANSFER 2 /* Receiving .rdb from master */ +#define REDIS_REPL_CONNECTED 3 /* 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 @@ -207,6 +203,13 @@ #define REDIS_OP_DIFF 1 #define REDIS_OP_INTER 2 +/* Redis maxmemory strategies */ +#define REDIS_MAXMEMORY_VOLATILE_LRU 0 +#define REDIS_MAXMEMORY_VOLATILE_TTL 1 +#define REDIS_MAXMEMORY_VOLATILE_RANDOM 2 +#define REDIS_MAXMEMORY_ALLKEYS_LRU 3 +#define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4 + /* We can print the stacktrace, so our assert is defined this way: */ #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1))) #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1) @@ -220,6 +223,8 @@ void _redisPanic(char *msg, char *file, int line); /* A redis object, that is a type able to hold a string / list / set */ /* The actual Redis Object */ +#define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */ +#define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */ typedef struct redisObject { unsigned type:4; unsigned storage:2; /* REDIS_VM_MEMORY or REDIS_VM_SWAPPING */ @@ -294,10 +299,11 @@ typedef struct redisClient { redisDb *db; int dictid; sds querybuf; - robj **argv, **mbargv; - int argc, mbargc; - long bulklen; /* bulk read len. -1 if not in bulk read mode */ - int multibulk; /* multi bulk command format active */ + int argc; + robj **argv; + int reqtype; + int multibulklen; /* number of multi bulk arguments left to read */ + long bulklen; /* length of bulk argument in multi bulk request */ list *reply; int sentlen; time_t lastinteraction; /* time of the last interaction, used for timeout */ @@ -322,8 +328,7 @@ typedef struct redisClient { /* Response buffer */ int bufpos; - int buflen; - char buf[]; + char buf[REDIS_REPLY_CHUNK_BYTES]; } redisClient; struct saveparam { @@ -347,22 +352,29 @@ struct sharedObjectsStruct { struct redisServer { pthread_t mainthread; int port; - int fd; + char *bindaddr; + char *unixsocket; + int ipfd; + int sofd; redisDb *db; long long dirty; /* changes to DB from the last save */ long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */ list *clients; + dict *commands; /* Command table hahs table */ + /* Fast pointers to often looked up command */ + struct redisCommand *delCommand, *multiCommand; list *slaves, *monitors; char neterr[ANET_ERR_LEN]; aeEventLoop *el; 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 */ + time_t lastsave; /* Unix time of last save succeeede */ /* Fields used only for stats */ - time_t stat_starttime; /* server start time */ - long long stat_numcommands; /* number of processed commands */ - long long stat_numconnections; /* number of connections received */ - long long stat_expiredkeys; /* number of expired keys */ + time_t stat_starttime; /* server start time */ + long long stat_numcommands; /* number of processed commands */ + long long stat_numconnections; /* number of connections received */ + long long stat_expiredkeys; /* number of expired keys */ + long long stat_keyspace_hits; /* number of successful lookups of keys */ + long long stat_keyspace_misses; /* number of failed lookups of keys */ /* Configuration */ int verbosity; int glueoutputbuf; @@ -384,7 +396,6 @@ struct redisServer { struct saveparam *saveparams; int saveparamslen; char *logfile; - char *bindaddr; char *dbfilename; char *appendfilename; char *requirepass; @@ -392,13 +403,24 @@ struct redisServer { int activerehashing; /* Replication related */ int isslave; + /* Slave specific fields */ char *masterauth; char *masterhost; int masterport; redisClient *master; /* client that is master for this slave */ - int replstate; + int replstate; /* replication status if the instance is a slave */ + off_t repl_transfer_left; /* bytes left reading .rdb */ + int repl_transfer_s; /* slave -> master SYNC socket */ + int repl_transfer_fd; /* slave -> master SYNC temp file descriptor */ + char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */ + time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */ + int repl_serve_stale_data; /* Serve stale data when link is down? */ + /* Limits */ unsigned int maxclients; unsigned long long maxmemory; + int maxmemory_policy; + int maxmemory_samples; + /* Blocked clients */ unsigned int blpop_blocked_clients; unsigned int vm_blocked_clients; /* Sort parameters - qsort_r() is only available under BSD so we @@ -434,7 +456,6 @@ struct redisServer { list *io_processed; /* List of VM I/O jobs already processed */ list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */ pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */ - pthread_mutex_t obj_freelist_mutex; /* safe redis objects creation/free */ pthread_mutex_t io_swapfile_mutex; /* So we can lseek + write */ pthread_attr_t io_threads_attr; /* attributes for threads creation */ int io_active_threads; /* Number of running I/O threads */ @@ -500,13 +521,14 @@ typedef struct _redisSortOperation { } redisSortOperation; /* ZSETs use a specialized version of Skiplists */ - typedef struct zskiplistNode { - struct zskiplistNode **forward; - struct zskiplistNode *backward; - unsigned int *span; - double score; robj *obj; + double score; + struct zskiplistNode *backward; + struct zskiplistLevel { + struct zskiplistNode *forward; + unsigned int span; + } level[]; } zskiplistNode; typedef struct zskiplist { @@ -607,18 +629,31 @@ void *addDeferredMultiBulkLength(redisClient *c); void setDeferredMultiBulkLength(redisClient *c, void *node, long length); void addReplySds(redisClient *c, sds s); void processInputBuffer(redisClient *c); -void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask); +void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask); +void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask); void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask); void addReplyBulk(redisClient *c, robj *obj); void addReplyBulkCString(redisClient *c, char *s); void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask); void addReply(redisClient *c, robj *obj); void addReplySds(redisClient *c, sds s); +void addReplyError(redisClient *c, char *err); +void addReplyStatus(redisClient *c, char *status); void addReplyDouble(redisClient *c, double d); void addReplyLongLong(redisClient *c, long long ll); void addReplyMultiBulkLen(redisClient *c, long length); void *dupClientReplyValue(void *o); +#ifdef __GNUC__ +void addReplyErrorFormat(redisClient *c, const char *fmt, ...) + __attribute__((format(printf, 2, 3))); +void addReplyStatusFormat(redisClient *c, const char *fmt, ...) + __attribute__((format(printf, 2, 3))); +#else +void addReplyErrorFormat(redisClient *c, const char *fmt, ...); +void addReplyStatusFormat(redisClient *c, const char *fmt, ...); +#endif + /* List data type */ void listTypeTryConversion(robj *subject, robj *value); void listTypePush(robj *subject, robj *value, int where); @@ -658,7 +693,6 @@ robj *dupStringObject(robj *o); robj *tryObjectEncoding(robj *o); robj *getDecodedObject(robj *o); size_t stringObjectLen(robj *o); -int tryFreeOneObjectFromFreelist(void); robj *createStringObjectFromLongLong(long long value); robj *createListObject(void); robj *createZiplistObject(void); @@ -674,12 +708,23 @@ int getLongLongFromObject(robj *o, long long *target); char *strEncoding(int encoding); int compareStringObjects(robj *a, robj *b); int equalStringObjects(robj *a, robj *b); +unsigned long estimateObjectIdleTime(robj *o); + +/* Synchronous I/O with timeout */ +int syncWrite(int fd, char *ptr, ssize_t size, int timeout); +int syncRead(int fd, char *ptr, ssize_t size, int timeout); +int syncReadLine(int fd, char *ptr, ssize_t size, int timeout); +int fwriteBulkString(FILE *fp, char *s, unsigned long len); +int fwriteBulkDouble(FILE *fp, double d); +int fwriteBulkLongLong(FILE *fp, long long l); +int fwriteBulkObject(FILE *fp, robj *obj); /* Replication */ void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc); void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc); int syncWithMaster(void); void updateSlavesWaitingBgsave(int bgsaveerr); +void replicationCron(void); /* RDB persistence */ int rdbLoad(char *filename); @@ -705,13 +750,14 @@ void backgroundRewriteDoneHandler(int statloc); /* Sorted sets data type */ zskiplist *zslCreate(void); void zslFree(zskiplist *zsl); -void zslInsert(zskiplist *zsl, double score, robj *obj); +zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj); /* Core functions */ void freeMemoryIfNeeded(void); int processCommand(redisClient *c); void setupSigSegvAction(void); -struct redisCommand *lookupCommand(char *name); +struct redisCommand *lookupCommand(sds name); +struct redisCommand *lookupCommandByCString(char *s); void call(redisClient *c, struct redisCommand *cmd); int prepareForShutdown(); void redisLog(int level, const char *fmt, ...); @@ -719,6 +765,7 @@ void usage(); void updateDictResizePolicy(void); int htNeedsResize(dict *dict); void oom(const char *msg); +void populateCommandTable(void); /* Virtual Memory */ void vmInit(void); @@ -892,6 +939,7 @@ void zaddCommand(redisClient *c); void zincrbyCommand(redisClient *c); void zrangeCommand(redisClient *c); void zrangebyscoreCommand(redisClient *c); +void zrevrangebyscoreCommand(redisClient *c); void zcountCommand(redisClient *c); void zrevrangeCommand(redisClient *c); void zcardCommand(redisClient *c);