src/redis.h

   1 #ifndef __REDIS_H
   2 #define __REDIS_H
   3
   4 #include "fmacros.h"
   5 #include "config.h"
   6
   7 #if defined(__sun)
   8 #include "solarisfixes.h"
   9 #endif
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <limits.h>
  16 #include <unistd.h>
  17 #include <errno.h>
  18 #include <inttypes.h>
  19 #include <pthread.h>
  20 #include <syslog.h>
  21 #include <netinet/in.h>
  22
  23 #include "ae.h"     /* Event driven programming library */
  24 #include "sds.h"    /* Dynamic safe strings */
  25 #include "dict.h"   /* Hash tables */
  26 #include "adlist.h" /* Linked lists */
  27 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  28 #include "anet.h"   /* Networking the easy way */
  29 #include "zipmap.h" /* Compact string -> string data structure */
  30 #include "ziplist.h" /* Compact list data structure */
  31 #include "intset.h" /* Compact integer set structure */
  32 #include "version.h"
  33 #include "util.h"
  34
  35 /* Error codes */
  36 #define REDIS_OK                0
  37 #define REDIS_ERR               -1
  38
  39 /* Static server configuration */
  40 #define REDIS_SERVERPORT        6379    /* TCP port */
  41 #define REDIS_MAXIDLETIME       (60*5)  /* default client timeout */
  42 #define REDIS_IOBUF_LEN         1024
  43 #define REDIS_LOADBUF_LEN       1024
  44 #define REDIS_STATIC_ARGS       8
  45 #define REDIS_DEFAULT_DBNUM     16
  46 #define REDIS_CONFIGLINE_MAX    1024
  47 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
  48 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  49 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  50 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
  51 #define REDIS_SHARED_INTEGERS 10000
  52 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
  53 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  54
  55 /* Hash table parameters */
  56 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  57
  58 /* Command flags:
  59  *   REDIS_CMD_DENYOOM:
  60  *     Commands marked with this flag will return an error when 'maxmemory' is
  61  *     set and the server is using more than 'maxmemory' bytes of memory.
  62  *     In short: commands with this flag are denied on low memory conditions.
  63  *   REDIS_CMD_FORCE_REPLICATION:
  64  *     Force replication even if dirty is 0. */
  65 #define REDIS_CMD_DENYOOM 4
  66 #define REDIS_CMD_FORCE_REPLICATION 8
  67
  68 /* Object types */
  69 #define REDIS_STRING 0
  70 #define REDIS_LIST 1
  71 #define REDIS_SET 2
  72 #define REDIS_ZSET 3
  73 #define REDIS_HASH 4
  74 #define REDIS_VMPOINTER 8
  75
  76 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  77  * internally represented in multiple ways. The 'encoding' field of the object
  78  * is set to one of this fields for this object. */
  79 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  80 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  81 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  82 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  83 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  84 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  85 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  86 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  87
  88 /* Scheduled IO opeations flags. */
  89 #define REDIS_IO_LOAD 1
  90 #define REDIS_IO_SAVE 2
  91 #define REDIS_IO_LOADINPROG 4
  92 #define REDIS_IO_SAVEINPROG 8
  93
  94 /* Generic IO flags */
  95 #define REDIS_IO_ONLYLOADS 1
  96 #define REDIS_IO_ASAP 2
  97
  98 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1
  99 #define REDIS_THREAD_STACK_SIZE (1024*1024*4)
 100
 101 /* Client flags */
 102 #define REDIS_SLAVE 1       /* This client is a slave server */
 103 #define REDIS_MASTER 2      /* This client is a master server */
 104 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 105 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 106 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 107 #define REDIS_IO_WAIT 32    /* The client is waiting for Virtual Memory I/O */
 108 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 109 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 110 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 111                                server.unblocked_clients */
 112
 113 /* Client request types */
 114 #define REDIS_REQ_INLINE 1
 115 #define REDIS_REQ_MULTIBULK 2
 116
 117 /* Slave replication state - slave side */
 118 #define REDIS_REPL_NONE 0   /* No active replication */
 119 #define REDIS_REPL_CONNECT 1    /* Must connect to master */
 120 #define REDIS_REPL_TRANSFER 2    /* Receiving .rdb from master */
 121 #define REDIS_REPL_CONNECTED 3  /* Connected to master */
 122
 123 /* Slave replication state - from the point of view of master
 124  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 125  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 126  * to start the next background saving in order to send updates to it. */
 127 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 128 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 129 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 130 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 131
 132 /* List related stuff */
 133 #define REDIS_HEAD 0
 134 #define REDIS_TAIL 1
 135
 136 /* Sort operations */
 137 #define REDIS_SORT_GET 0
 138 #define REDIS_SORT_ASC 1
 139 #define REDIS_SORT_DESC 2
 140 #define REDIS_SORTKEY_MAX 1024
 141
 142 /* Log levels */
 143 #define REDIS_DEBUG 0
 144 #define REDIS_VERBOSE 1
 145 #define REDIS_NOTICE 2
 146 #define REDIS_WARNING 3
 147 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 148
 149 /* Anti-warning macro... */
 150 #define REDIS_NOTUSED(V) ((void) V)
 151
 152 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 153 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 154
 155 /* Append only defines */
 156 #define APPENDFSYNC_NO 0
 157 #define APPENDFSYNC_ALWAYS 1
 158 #define APPENDFSYNC_EVERYSEC 2
 159
 160 /* Zip structure related defaults */
 161 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 162 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 163 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 164 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 165 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 166 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 167 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 168
 169 /* Sets operations codes */
 170 #define REDIS_OP_UNION 0
 171 #define REDIS_OP_DIFF 1
 172 #define REDIS_OP_INTER 2
 173
 174 /* Redis maxmemory strategies */
 175 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 176 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 177 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 178 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 179 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 180 #define REDIS_MAXMEMORY_NO_EVICTION 5
 181
 182 /* Diskstore background saving thread states */
 183 #define REDIS_BGSAVE_THREAD_UNACTIVE 0
 184 #define REDIS_BGSAVE_THREAD_ACTIVE 1
 185 #define REDIS_BGSAVE_THREAD_DONE_OK 2
 186 #define REDIS_BGSAVE_THREAD_DONE_ERR 3
 187
 188 /* We can print the stacktrace, so our assert is defined this way: */
 189 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 190 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 191 void _redisAssert(char *estr, char *file, int line);
 192 void _redisPanic(char *msg, char *file, int line);
 193
 194 /*-----------------------------------------------------------------------------
 195  * Data types
 196  *----------------------------------------------------------------------------*/
 197
 198 /* A redis object, that is a type able to hold a string / list / set */
 199
 200 /* The actual Redis Object */
 201 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 202 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 203 typedef struct redisObject {
 204     unsigned type:4;
 205     unsigned notused:2;     /* Not used */
 206     unsigned encoding:4;
 207     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 208     int refcount;
 209     void *ptr;
 210     /* VM fields are only allocated if VM is active, otherwise the
 211      * object allocation function will just allocate
 212      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 213      * Redis without VM active will not have any overhead. */
 214 } robj;
 215
 216 /* The VM pointer structure - identifies an object in the swap file.
 217  *
 218  * This object is stored in place of the value
 219  * object in the main key->value hash table representing a database.
 220  * Note that the first fields (type, storage) are the same as the redisObject
 221  * structure so that vmPointer strucuters can be accessed even when casted
 222  * as redisObject structures.
 223  *
 224  * This is useful as we don't know if a value object is or not on disk, but we
 225  * are always able to read obj->storage to check this. For vmPointer
 226  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 227  * is still possible to check the kind of object from the value of 'storage').*/
 228 typedef struct vmPointer {
 229     unsigned type:4;
 230     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 231     unsigned notused:26;
 232     unsigned int vtype; /* type of the object stored in the swap file */
 233     off_t page;         /* the page at witch the object is stored on disk */
 234     off_t usedpages;    /* number of pages used on disk */
 235 } vmpointer;
 236
 237 /* Macro used to initalize a Redis object allocated on the stack.
 238  * Note that this macro is taken near the structure definition to make sure
 239  * we'll update it when the structure is changed, to avoid bugs like
 240  * bug #85 introduced exactly in this way. */
 241 #define initStaticStringObject(_var,_ptr) do { \
 242     _var.refcount = 1; \
 243     _var.type = REDIS_STRING; \
 244     _var.encoding = REDIS_ENCODING_RAW; \
 245     _var.ptr = _ptr; \
 246 } while(0);
 247
 248 typedef struct redisDb {
 249     dict *dict;                 /* The keyspace for this DB */
 250     dict *expires;              /* Timeout of keys with a timeout set */
 251     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 252     dict *io_keys;              /* Keys with clients waiting for DS I/O */
 253     dict *io_negcache;          /* Negative caching for disk store */
 254     dict *io_queued;            /* Queued IO operations hash table */
 255     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 256     int id;
 257 } redisDb;
 258
 259 /* Client MULTI/EXEC state */
 260 typedef struct multiCmd {
 261     robj **argv;
 262     int argc;
 263     struct redisCommand *cmd;
 264 } multiCmd;
 265
 266 typedef struct multiState {
 267     multiCmd *commands;     /* Array of MULTI commands */
 268     int count;              /* Total number of MULTI commands */
 269 } multiState;
 270
 271 typedef struct blockingState {
 272     robj **keys;            /* The key we are waiting to terminate a blocking
 273                              * operation such as BLPOP. Otherwise NULL. */
 274     int count;              /* Number of blocking keys */
 275     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 276                              * is >= timeout then the operation timed out. */
 277     robj *target;           /* The key that should receive the element,
 278                              * for BRPOPLPUSH. */
 279 } blockingState;
 280
 281 /* With multiplexing we need to take per-clinet state.
 282  * Clients are taken in a liked list. */
 283 typedef struct redisClient {
 284     int fd;
 285     redisDb *db;
 286     int dictid;
 287     sds querybuf;
 288     int argc;
 289     robj **argv;
 290     int reqtype;
 291     int multibulklen;       /* number of multi bulk arguments left to read */
 292     long bulklen;           /* length of bulk argument in multi bulk request */
 293     list *reply;
 294     int sentlen;
 295     time_t lastinteraction; /* time of the last interaction, used for timeout */
 296     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 297     int slaveseldb;         /* slave selected db, if this client is a slave */
 298     int authenticated;      /* when requirepass is non-NULL */
 299     int replstate;          /* replication state if this is a slave */
 300     int repldbfd;           /* replication DB file descriptor */
 301     long repldboff;         /* replication DB file offset */
 302     off_t repldbsize;       /* replication DB file size */
 303     multiState mstate;      /* MULTI/EXEC state */
 304     blockingState bpop;   /* blocking state */
 305     list *io_keys;          /* Keys this client is waiting to be loaded from the
 306                              * swap file in order to continue. */
 307     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 308     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 309     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 310
 311     /* Response buffer */
 312     int bufpos;
 313     char buf[REDIS_REPLY_CHUNK_BYTES];
 314 } redisClient;
 315
 316 struct saveparam {
 317     time_t seconds;
 318     int changes;
 319 };
 320
 321 struct sharedObjectsStruct {
 322     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 323     *colon, *nullbulk, *nullmultibulk, *queued,
 324     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 325     *outofrangeerr, *loadingerr, *plus,
 326     *select0, *select1, *select2, *select3, *select4,
 327     *select5, *select6, *select7, *select8, *select9,
 328     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 329     *mbulk4, *psubscribebulk, *punsubscribebulk,
 330     *integers[REDIS_SHARED_INTEGERS];
 331 };
 332
 333 /* ZSETs use a specialized version of Skiplists */
 334 typedef struct zskiplistNode {
 335     robj *obj;
 336     double score;
 337     struct zskiplistNode *backward;
 338     struct zskiplistLevel {
 339         struct zskiplistNode *forward;
 340         unsigned int span;
 341     } level[];
 342 } zskiplistNode;
 343
 344 typedef struct zskiplist {
 345     struct zskiplistNode *header, *tail;
 346     unsigned long length;
 347     int level;
 348 } zskiplist;
 349
 350 typedef struct zset {
 351     dict *dict;
 352     zskiplist *zsl;
 353 } zset;
 354
 355 /*-----------------------------------------------------------------------------
 356  * Redis cluster data structures
 357  *----------------------------------------------------------------------------*/
 358
 359 #define REDIS_CLUSTER_SLOTS 4096
 360 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 361 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 362 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 363 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 364 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 365
 366 struct clusterNode;
 367
 368 /* clusterLink encapsulates everything needed to talk with a remote node. */
 369 typedef struct clusterLink {
 370     int fd;                     /* TCP socket file descriptor */
 371     sds sndbuf;                 /* Packet send buffer */
 372     sds rcvbuf;                 /* Packet reception buffer */
 373     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 374 } clusterLink;
 375
 376 /* Node flags */
 377 #define REDIS_NODE_MASTER 1     /* The node is a master */
 378 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 379 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 380 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 381 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 382 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 383 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 384 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 385 #define REDIS_NODE_NULL_NAME "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
 386
 387 struct clusterNode {
 388     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 389     int flags;      /* REDIS_NODE_... */
 390     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 391     int numslaves;  /* Number of slave nodes, if this is a master */
 392     struct clusterNode **slaves; /* pointers to slave nodes */
 393     struct clusterNode *slaveof; /* pointer to the master node */
 394     time_t ping_sent;       /* Unix time we sent latest ping */
 395     time_t pong_received;   /* Unix time we received the pong */
 396     char *configdigest;         /* Configuration digest of this node */
 397     time_t configdigest_ts;     /* Configuration digest timestamp */
 398     char ip[16];                /* Latest known IP address of this node */
 399     int port;                   /* Latest known port of this node */
 400     clusterLink *link;          /* TCP/IP link with this node */
 401 };
 402 typedef struct clusterNode clusterNode;
 403
 404 typedef struct {
 405     char *configfile;
 406     clusterNode *myself;  /* This node */
 407     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 408     int node_timeout;
 409     dict *nodes;          /* Hash table of name -> clusterNode structures */
 410     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 411     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 412     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 413     zskiplist *slots_to_keys;
 414 } clusterState;
 415
 416 /* Redis cluster messages header */
 417
 418 /* Note that the PING, PONG and MEET messages are actually the same exact
 419  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 420  * while MEET is a special PING that forces the receiver to add the sender
 421  * as a node (if it is not already in the list). */
 422 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 423 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 424 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 425 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 426
 427 /* Initially we don't know our "name", but we'll find it once we connect
 428  * to the first node, using the getsockname() function. Then we'll use this
 429  * address for all the next messages. */
 430 typedef struct {
 431     char nodename[REDIS_CLUSTER_NAMELEN];
 432     uint32_t ping_sent;
 433     uint32_t pong_received;
 434     char ip[16];    /* IP address last time it was seen */
 435     uint16_t port;  /* port last time it was seen */
 436     uint16_t flags;
 437     uint32_t notused; /* for 64 bit alignment */
 438 } clusterMsgDataGossip;
 439
 440 typedef struct {
 441     char nodename[REDIS_CLUSTER_NAMELEN];
 442 } clusterMsgDataFail;
 443
 444 union clusterMsgData {
 445     /* PING, MEET and PONG */
 446     struct {
 447         /* Array of N clusterMsgDataGossip structures */
 448         clusterMsgDataGossip gossip[1];
 449     } ping;
 450     /* FAIL */
 451     struct {
 452         clusterMsgDataFail about;
 453     } fail;
 454 };
 455
 456 typedef struct {
 457     uint32_t totlen;    /* Total length of this message */
 458     uint16_t type;      /* Message type */
 459     uint16_t count;     /* Only used for some kind of messages. */
 460     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 461     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 462     char slaveof[REDIS_CLUSTER_NAMELEN];
 463     char configdigest[32];
 464     uint16_t port;      /* Sender TCP base port */
 465     unsigned char state; /* Cluster state from the POV of the sender */
 466     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 467     union clusterMsgData data;
 468 } clusterMsg;
 469
 470 /*-----------------------------------------------------------------------------
 471  * Global server state
 472  *----------------------------------------------------------------------------*/
 473
 474 struct redisServer {
 475     /* General */
 476     pthread_t mainthread;
 477     redisDb *db;
 478     dict *commands;             /* Command table hahs table */
 479     aeEventLoop *el;
 480     /* Networking */
 481     int port;
 482     char *bindaddr;
 483     char *unixsocket;
 484     int ipfd;
 485     int sofd;
 486     int cfd;
 487     list *clients;
 488     list *slaves, *monitors;
 489     char neterr[ANET_ERR_LEN];
 490     /* RDB / AOF loading information */
 491     int loading;
 492     off_t loading_total_bytes;
 493     off_t loading_loaded_bytes;
 494     time_t loading_start_time;
 495     /* Fast pointers to often looked up command */
 496     struct redisCommand *delCommand, *multiCommand;
 497     int cronloops;              /* number of times the cron function run */
 498     time_t lastsave;                /* Unix time of last save succeeede */
 499     /* Fields used only for stats */
 500     time_t stat_starttime;          /* server start time */
 501     long long stat_numcommands;     /* number of processed commands */
 502     long long stat_numconnections;  /* number of connections received */
 503     long long stat_expiredkeys;     /* number of expired keys */
 504     long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */
 505     long long stat_keyspace_hits;   /* number of successful lookups of keys */
 506     long long stat_keyspace_misses; /* number of failed lookups of keys */
 507     size_t stat_peak_memory;        /* max used memory record */
 508     /* Configuration */
 509     int verbosity;
 510     int maxidletime;
 511     int dbnum;
 512     int daemonize;
 513     int appendonly;
 514     int appendfsync;
 515     int no_appendfsync_on_rewrite;
 516     int shutdown_asap;
 517     int activerehashing;
 518     char *requirepass;
 519     /* Persistence */
 520     long long dirty;            /* changes to DB from the last save */
 521     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 522     time_t lastfsync;
 523     int appendfd;
 524     int appendseldb;
 525     char *pidfile;
 526     pid_t bgsavechildpid;
 527     pid_t bgrewritechildpid;
 528     int bgsavethread_state;
 529     pthread_mutex_t bgsavethread_mutex;
 530     pthread_t bgsavethread;
 531     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 532     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 533     struct saveparam *saveparams;
 534     int saveparamslen;
 535     char *dbfilename;
 536     int rdbcompression;
 537     char *appendfilename;
 538     /* Logging */
 539     char *logfile;
 540     int syslog_enabled;
 541     char *syslog_ident;
 542     int syslog_facility;
 543     /* Replication related */
 544     int isslave;
 545     /* Slave specific fields */
 546     char *masterauth;
 547     char *masterhost;
 548     int masterport;
 549     redisClient *master;    /* client that is master for this slave */
 550     int replstate;          /* replication status if the instance is a slave */
 551     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 552     int repl_transfer_s;    /* slave -> master SYNC socket */
 553     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 554     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 555     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 556     int repl_serve_stale_data; /* Serve stale data when link is down? */
 557     /* Limits */
 558     unsigned int maxclients;
 559     unsigned long long maxmemory;
 560     int maxmemory_policy;
 561     int maxmemory_samples;
 562     /* Blocked clients */
 563     unsigned int bpop_blocked_clients;
 564     unsigned int cache_blocked_clients;
 565     list *unblocked_clients; /* list of clients to unblock before next loop */
 566     list *cache_io_queue;    /* IO operations queue */
 567     int cache_flush_delay;   /* seconds to wait before flushing keys */
 568     /* Sort parameters - qsort_r() is only available under BSD so we
 569      * have to take this state global, in order to pass it to sortCompare() */
 570     int sort_desc;
 571     int sort_alpha;
 572     int sort_bypattern;
 573     /* Virtual memory configuration */
 574     int ds_enabled; /* backend disk in redis.conf */
 575     char *ds_path;  /* location of the disk store on disk */
 576     unsigned long long cache_max_memory;
 577     /* Zip structure config */
 578     size_t hash_max_zipmap_entries;
 579     size_t hash_max_zipmap_value;
 580     size_t list_max_ziplist_entries;
 581     size_t list_max_ziplist_value;
 582     size_t set_max_intset_entries;
 583     size_t zset_max_ziplist_entries;
 584     size_t zset_max_ziplist_value;
 585     time_t unixtime;    /* Unix time sampled every second. */
 586     /* Virtual memory I/O threads stuff */
 587     /* An I/O thread process an element taken from the io_jobs queue and
 588      * put the result of the operation in the io_done list. While the
 589      * job is being processed, it's put on io_processing queue. */
 590     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 591     list *io_processing; /* List of VM I/O jobs being processed */
 592     list *io_processed; /* List of VM I/O jobs already processed */
 593     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 594     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 595     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 596     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 597     int io_active_threads; /* Number of running I/O threads */
 598     int vm_max_threads; /* Max number of I/O threads running at the same time */
 599     /* Our main thread is blocked on the event loop, locking for sockets ready
 600      * to be read or written, so when a threaded I/O operation is ready to be
 601      * processed by the main thread, the I/O thread will use a unix pipe to
 602      * awake the main thread. The followings are the two pipe FDs. */
 603     int io_ready_pipe_read;
 604     int io_ready_pipe_write;
 605     /* Virtual memory stats */
 606     unsigned long long vm_stats_used_pages;
 607     unsigned long long vm_stats_swapped_objects;
 608     unsigned long long vm_stats_swapouts;
 609     unsigned long long vm_stats_swapins;
 610     /* Pubsub */
 611     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 612     list *pubsub_patterns; /* A list of pubsub_patterns */
 613     /* Misc */
 614     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 615     unsigned lruclock_padding:10;
 616     /* Cluster */
 617     int cluster_enabled;
 618     clusterState cluster;
 619 };
 620
 621 typedef struct pubsubPattern {
 622     redisClient *client;
 623     robj *pattern;
 624 } pubsubPattern;
 625
 626 typedef void redisCommandProc(redisClient *c);
 627 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 628 struct redisCommand {
 629     char *name;
 630     redisCommandProc *proc;
 631     int arity;
 632     int flags;
 633     /* Use a function to determine keys arguments in a command line.
 634      * Used both for diskstore preloading and Redis Cluster. */
 635     redisGetKeysProc *getkeys_proc;
 636     /* What keys should be loaded in background when calling this command? */
 637     int firstkey; /* The first argument that's a key (0 = no keys) */
 638     int lastkey;  /* THe last argument that's a key */
 639     int keystep;  /* The step between first and last key */
 640     long long microseconds, calls;
 641 };
 642
 643 struct redisFunctionSym {
 644     char *name;
 645     unsigned long pointer;
 646 };
 647
 648 typedef struct _redisSortObject {
 649     robj *obj;
 650     union {
 651         double score;
 652         robj *cmpobj;
 653     } u;
 654 } redisSortObject;
 655
 656 typedef struct _redisSortOperation {
 657     int type;
 658     robj *pattern;
 659 } redisSortOperation;
 660
 661 /* DIsk store threaded I/O request message */
 662 #define REDIS_IOJOB_LOAD 0
 663 #define REDIS_IOJOB_SAVE 1
 664
 665 typedef struct iojob {
 666     int type;   /* Request type, REDIS_IOJOB_* */
 667     redisDb *db;/* Redis database */
 668     robj *key;  /* This I/O request is about this key */
 669     robj *val;  /* the value to swap for REDIS_IOJOB_SAVE, otherwise this
 670                  * field is populated by the I/O thread for REDIS_IOJOB_LOAD. */
 671     time_t expire; /* Expire time for this key on REDIS_IOJOB_LOAD */
 672 } iojob;
 673
 674 /* IO operations scheduled -- check dscache.c for more info */
 675 typedef struct ioop {
 676     int type;
 677     redisDb *db;
 678     robj *key;
 679     time_t ctime; /* This is the creation time of the entry. */
 680 } ioop;
 681
 682 /* Structure to hold list iteration abstraction. */
 683 typedef struct {
 684     robj *subject;
 685     unsigned char encoding;
 686     unsigned char direction; /* Iteration direction */
 687     unsigned char *zi;
 688     listNode *ln;
 689 } listTypeIterator;
 690
 691 /* Structure for an entry while iterating over a list. */
 692 typedef struct {
 693     listTypeIterator *li;
 694     unsigned char *zi;  /* Entry in ziplist */
 695     listNode *ln;       /* Entry in linked list */
 696 } listTypeEntry;
 697
 698 /* Structure to hold set iteration abstraction. */
 699 typedef struct {
 700     robj *subject;
 701     int encoding;
 702     int ii; /* intset iterator */
 703     dictIterator *di;
 704 } setTypeIterator;
 705
 706 /* Structure to hold hash iteration abstration. Note that iteration over
 707  * hashes involves both fields and values. Because it is possible that
 708  * not both are required, store pointers in the iterator to avoid
 709  * unnecessary memory allocation for fields/values. */
 710 typedef struct {
 711     int encoding;
 712     unsigned char *zi;
 713     unsigned char *zk, *zv;
 714     unsigned int zklen, zvlen;
 715
 716     dictIterator *di;
 717     dictEntry *de;
 718 } hashTypeIterator;
 719
 720 #define REDIS_HASH_KEY 1
 721 #define REDIS_HASH_VALUE 2
 722
 723 /*-----------------------------------------------------------------------------
 724  * Extern declarations
 725  *----------------------------------------------------------------------------*/
 726
 727 extern struct redisServer server;
 728 extern struct sharedObjectsStruct shared;
 729 extern dictType setDictType;
 730 extern dictType zsetDictType;
 731 extern dictType clusterNodesDictType;
 732 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 733 dictType hashDictType;
 734
 735 /*-----------------------------------------------------------------------------
 736  * Functions prototypes
 737  *----------------------------------------------------------------------------*/
 738
 739 /* Utils */
 740 long long ustime(void);
 741
 742 /* networking.c -- Networking and Client related operations */
 743 redisClient *createClient(int fd);
 744 void closeTimedoutClients(void);
 745 void freeClient(redisClient *c);
 746 void resetClient(redisClient *c);
 747 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 748 void addReply(redisClient *c, robj *obj);
 749 void *addDeferredMultiBulkLength(redisClient *c);
 750 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 751 void addReplySds(redisClient *c, sds s);
 752 void processInputBuffer(redisClient *c);
 753 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 754 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 755 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 756 void addReplyBulk(redisClient *c, robj *obj);
 757 void addReplyBulkCString(redisClient *c, char *s);
 758 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 759 void addReplyBulkLongLong(redisClient *c, long long ll);
 760 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 761 void addReply(redisClient *c, robj *obj);
 762 void addReplySds(redisClient *c, sds s);
 763 void addReplyError(redisClient *c, char *err);
 764 void addReplyStatus(redisClient *c, char *status);
 765 void addReplyDouble(redisClient *c, double d);
 766 void addReplyLongLong(redisClient *c, long long ll);
 767 void addReplyMultiBulkLen(redisClient *c, long length);
 768 void *dupClientReplyValue(void *o);
 769 void getClientsMaxBuffers(unsigned long *longest_output_list,
 770                           unsigned long *biggest_input_buffer);
 771
 772 #ifdef __GNUC__
 773 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 774     __attribute__((format(printf, 2, 3)));
 775 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 776     __attribute__((format(printf, 2, 3)));
 777 #else
 778 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 779 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 780 #endif
 781
 782 /* List data type */
 783 void listTypeTryConversion(robj *subject, robj *value);
 784 void listTypePush(robj *subject, robj *value, int where);
 785 robj *listTypePop(robj *subject, int where);
 786 unsigned long listTypeLength(robj *subject);
 787 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 788 void listTypeReleaseIterator(listTypeIterator *li);
 789 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 790 robj *listTypeGet(listTypeEntry *entry);
 791 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 792 int listTypeEqual(listTypeEntry *entry, robj *o);
 793 void listTypeDelete(listTypeEntry *entry);
 794 void listTypeConvert(robj *subject, int enc);
 795 void unblockClientWaitingData(redisClient *c);
 796 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 797 void popGenericCommand(redisClient *c, int where);
 798
 799 /* MULTI/EXEC/WATCH... */
 800 void unwatchAllKeys(redisClient *c);
 801 void initClientMultiState(redisClient *c);
 802 void freeClientMultiState(redisClient *c);
 803 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
 804 void touchWatchedKey(redisDb *db, robj *key);
 805 void touchWatchedKeysOnFlush(int dbid);
 806
 807 /* Redis object implementation */
 808 void decrRefCount(void *o);
 809 void incrRefCount(robj *o);
 810 void freeStringObject(robj *o);
 811 void freeListObject(robj *o);
 812 void freeSetObject(robj *o);
 813 void freeZsetObject(robj *o);
 814 void freeHashObject(robj *o);
 815 robj *createObject(int type, void *ptr);
 816 robj *createStringObject(char *ptr, size_t len);
 817 robj *dupStringObject(robj *o);
 818 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 819 robj *tryObjectEncoding(robj *o);
 820 robj *getDecodedObject(robj *o);
 821 size_t stringObjectLen(robj *o);
 822 robj *createStringObjectFromLongLong(long long value);
 823 robj *createListObject(void);
 824 robj *createZiplistObject(void);
 825 robj *createSetObject(void);
 826 robj *createIntsetObject(void);
 827 robj *createHashObject(void);
 828 robj *createZsetObject(void);
 829 robj *createZsetZiplistObject(void);
 830 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 831 int checkType(redisClient *c, robj *o, int type);
 832 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 833 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 834 int getLongLongFromObject(robj *o, long long *target);
 835 char *strEncoding(int encoding);
 836 int compareStringObjects(robj *a, robj *b);
 837 int equalStringObjects(robj *a, robj *b);
 838 unsigned long estimateObjectIdleTime(robj *o);
 839
 840 /* Synchronous I/O with timeout */
 841 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 842 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 843 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 844 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 845 int fwriteBulkDouble(FILE *fp, double d);
 846 int fwriteBulkLongLong(FILE *fp, long long l);
 847 int fwriteBulkObject(FILE *fp, robj *obj);
 848 int fwriteBulkCount(FILE *fp, char prefix, int count);
 849
 850 /* Replication */
 851 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 852 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 853 int syncWithMaster(void);
 854 void updateSlavesWaitingBgsave(int bgsaveerr);
 855 void replicationCron(void);
 856
 857 /* Generic persistence functions */
 858 void startLoading(FILE *fp);
 859 void loadingProgress(off_t pos);
 860 void stopLoading(void);
 861
 862 /* RDB persistence */
 863 #include "rdb.h"
 864
 865 /* AOF persistence */
 866 void flushAppendOnlyFile(void);
 867 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 868 void aofRemoveTempFile(pid_t childpid);
 869 int rewriteAppendOnlyFileBackground(void);
 870 int loadAppendOnlyFile(char *filename);
 871 void stopAppendOnly(void);
 872 int startAppendOnly(void);
 873 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 874
 875 /* Sorted sets data type */
 876
 877 /* Struct to hold a inclusive/exclusive range spec. */
 878 typedef struct {
 879     double min, max;
 880     int minex, maxex; /* are min or max exclusive? */
 881 } zrangespec;
 882
 883 zskiplist *zslCreate(void);
 884 void zslFree(zskiplist *zsl);
 885 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 886 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 887 int zslDelete(zskiplist *zsl, double score, robj *obj);
 888 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 889 double zzlGetScore(unsigned char *sptr);
 890 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 891 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 892 unsigned int zsetLength(robj *zobj);
 893 void zsetConvert(robj *zobj, int encoding);
 894
 895 /* Core functions */
 896 void freeMemoryIfNeeded(void);
 897 int processCommand(redisClient *c);
 898 void setupSignalHandlers(void);
 899 struct redisCommand *lookupCommand(sds name);
 900 struct redisCommand *lookupCommandByCString(char *s);
 901 void call(redisClient *c, struct redisCommand *cmd);
 902 int prepareForShutdown();
 903 void redisLog(int level, const char *fmt, ...);
 904 void usage();
 905 void updateDictResizePolicy(void);
 906 int htNeedsResize(dict *dict);
 907 void oom(const char *msg);
 908 void populateCommandTable(void);
 909 void resetCommandTableStats(void);
 910
 911 /* Disk store */
 912 int dsOpen(void);
 913 int dsClose(void);
 914 int dsSet(redisDb *db, robj *key, robj *val, time_t expire);
 915 robj *dsGet(redisDb *db, robj *key, time_t *expire);
 916 int dsDel(redisDb *db, robj *key);
 917 int dsExists(redisDb *db, robj *key);
 918 void dsFlushDb(int dbid);
 919 int dsRdbSaveBackground(char *filename);
 920 int dsRdbSave(char *filename);
 921
 922 /* Disk Store Cache */
 923 void dsInit(void);
 924 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);
 925 void lockThreadedIO(void);
 926 void unlockThreadedIO(void);
 927 void freeIOJob(iojob *j);
 928 void queueIOJob(iojob *j);
 929 void waitEmptyIOJobsQueue(void);
 930 void processAllPendingIOJobs(void);
 931 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
 932 int dontWaitForSwappedKey(redisClient *c, robj *key);
 933 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
 934 int cacheFreeOneEntry(void);
 935 void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag);
 936 void cacheScheduleIODelFlag(redisDb *db, robj *key, long flag);
 937 int cacheScheduleIOGetFlags(redisDb *db, robj *key);
 938 void cacheScheduleIO(redisDb *db, robj *key, int type);
 939 void cacheCron(void);
 940 int cacheKeyMayExist(redisDb *db, robj *key);
 941 void cacheSetKeyMayExist(redisDb *db, robj *key);
 942 void cacheSetKeyDoesNotExist(redisDb *db, robj *key);
 943 void cacheForcePointInTime(void);
 944
 945 /* Set data type */
 946 robj *setTypeCreate(robj *value);
 947 int setTypeAdd(robj *subject, robj *value);
 948 int setTypeRemove(robj *subject, robj *value);
 949 int setTypeIsMember(robj *subject, robj *value);
 950 setTypeIterator *setTypeInitIterator(robj *subject);
 951 void setTypeReleaseIterator(setTypeIterator *si);
 952 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 953 robj *setTypeNextObject(setTypeIterator *si);
 954 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 955 unsigned long setTypeSize(robj *subject);
 956 void setTypeConvert(robj *subject, int enc);
 957
 958 /* Hash data type */
 959 void convertToRealHash(robj *o);
 960 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 961 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 962 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 963 robj *hashTypeGetObject(robj *o, robj *key);
 964 int hashTypeExists(robj *o, robj *key);
 965 int hashTypeSet(robj *o, robj *key, robj *value);
 966 int hashTypeDelete(robj *o, robj *key);
 967 unsigned long hashTypeLength(robj *o);
 968 hashTypeIterator *hashTypeInitIterator(robj *subject);
 969 void hashTypeReleaseIterator(hashTypeIterator *hi);
 970 int hashTypeNext(hashTypeIterator *hi);
 971 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 972 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 973 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 974
 975 /* Pub / Sub */
 976 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 977 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 978 void freePubsubPattern(void *p);
 979 int listMatchPubsubPattern(void *a, void *b);
 980
 981 /* Configuration */
 982 void loadServerConfig(char *filename);
 983 void appendServerSaveParams(time_t seconds, int changes);
 984 void resetServerSaveParams();
 985
 986 /* db.c -- Keyspace access API */
 987 int removeExpire(redisDb *db, robj *key);
 988 void propagateExpire(redisDb *db, robj *key);
 989 int expireIfNeeded(redisDb *db, robj *key);
 990 time_t getExpire(redisDb *db, robj *key);
 991 void setExpire(redisDb *db, robj *key, time_t when);
 992 robj *lookupKey(redisDb *db, robj *key);
 993 robj *lookupKeyRead(redisDb *db, robj *key);
 994 robj *lookupKeyWrite(redisDb *db, robj *key);
 995 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 996 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 997 int dbAdd(redisDb *db, robj *key, robj *val);
 998 int dbReplace(redisDb *db, robj *key, robj *val);
 999 int dbExists(redisDb *db, robj *key);
1000 robj *dbRandomKey(redisDb *db);
1001 int dbDelete(redisDb *db, robj *key);
1002 long long emptyDb();
1003 int selectDb(redisClient *c, int id);
1004 void signalModifiedKey(redisDb *db, robj *key);
1005 void signalFlushedDb(int dbid);
1006 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
1007
1008 /* API to get key arguments from commands */
1009 #define REDIS_GETKEYS_ALL 0
1010 #define REDIS_GETKEYS_PRELOAD 1
1011 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1012 void getKeysFreeResult(int *result);
1013 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1014 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1015 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1016
1017 /* Cluster */
1018 void clusterInit(void);
1019 unsigned short crc16(const char *buf, int len);
1020 unsigned int keyHashSlot(char *key, int keylen);
1021 clusterNode *createClusterNode(char *nodename, int flags);
1022 int clusterAddNode(clusterNode *node);
1023 void clusterCron(void);
1024 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1025
1026 /* Git SHA1 */
1027 char *redisGitSHA1(void);
1028 char *redisGitDirty(void);
1029
1030 /* Commands prototypes */
1031 void authCommand(redisClient *c);
1032 void pingCommand(redisClient *c);
1033 void echoCommand(redisClient *c);
1034 void setCommand(redisClient *c);
1035 void setnxCommand(redisClient *c);
1036 void setexCommand(redisClient *c);
1037 void getCommand(redisClient *c);
1038 void delCommand(redisClient *c);
1039 void existsCommand(redisClient *c);
1040 void setbitCommand(redisClient *c);
1041 void getbitCommand(redisClient *c);
1042 void setrangeCommand(redisClient *c);
1043 void getrangeCommand(redisClient *c);
1044 void incrCommand(redisClient *c);
1045 void decrCommand(redisClient *c);
1046 void incrbyCommand(redisClient *c);
1047 void decrbyCommand(redisClient *c);
1048 void selectCommand(redisClient *c);
1049 void randomkeyCommand(redisClient *c);
1050 void keysCommand(redisClient *c);
1051 void dbsizeCommand(redisClient *c);
1052 void lastsaveCommand(redisClient *c);
1053 void saveCommand(redisClient *c);
1054 void bgsaveCommand(redisClient *c);
1055 void bgrewriteaofCommand(redisClient *c);
1056 void shutdownCommand(redisClient *c);
1057 void moveCommand(redisClient *c);
1058 void renameCommand(redisClient *c);
1059 void renamenxCommand(redisClient *c);
1060 void lpushCommand(redisClient *c);
1061 void rpushCommand(redisClient *c);
1062 void lpushxCommand(redisClient *c);
1063 void rpushxCommand(redisClient *c);
1064 void linsertCommand(redisClient *c);
1065 void lpopCommand(redisClient *c);
1066 void rpopCommand(redisClient *c);
1067 void llenCommand(redisClient *c);
1068 void lindexCommand(redisClient *c);
1069 void lrangeCommand(redisClient *c);
1070 void ltrimCommand(redisClient *c);
1071 void typeCommand(redisClient *c);
1072 void lsetCommand(redisClient *c);
1073 void saddCommand(redisClient *c);
1074 void sremCommand(redisClient *c);
1075 void smoveCommand(redisClient *c);
1076 void sismemberCommand(redisClient *c);
1077 void scardCommand(redisClient *c);
1078 void spopCommand(redisClient *c);
1079 void srandmemberCommand(redisClient *c);
1080 void sinterCommand(redisClient *c);
1081 void sinterstoreCommand(redisClient *c);
1082 void sunionCommand(redisClient *c);
1083 void sunionstoreCommand(redisClient *c);
1084 void sdiffCommand(redisClient *c);
1085 void sdiffstoreCommand(redisClient *c);
1086 void syncCommand(redisClient *c);
1087 void flushdbCommand(redisClient *c);
1088 void flushallCommand(redisClient *c);
1089 void sortCommand(redisClient *c);
1090 void lremCommand(redisClient *c);
1091 void rpoplpushCommand(redisClient *c);
1092 void infoCommand(redisClient *c);
1093 void mgetCommand(redisClient *c);
1094 void monitorCommand(redisClient *c);
1095 void expireCommand(redisClient *c);
1096 void expireatCommand(redisClient *c);
1097 void getsetCommand(redisClient *c);
1098 void ttlCommand(redisClient *c);
1099 void persistCommand(redisClient *c);
1100 void slaveofCommand(redisClient *c);
1101 void debugCommand(redisClient *c);
1102 void msetCommand(redisClient *c);
1103 void msetnxCommand(redisClient *c);
1104 void zaddCommand(redisClient *c);
1105 void zincrbyCommand(redisClient *c);
1106 void zrangeCommand(redisClient *c);
1107 void zrangebyscoreCommand(redisClient *c);
1108 void zrevrangebyscoreCommand(redisClient *c);
1109 void zcountCommand(redisClient *c);
1110 void zrevrangeCommand(redisClient *c);
1111 void zcardCommand(redisClient *c);
1112 void zremCommand(redisClient *c);
1113 void zscoreCommand(redisClient *c);
1114 void zremrangebyscoreCommand(redisClient *c);
1115 void multiCommand(redisClient *c);
1116 void execCommand(redisClient *c);
1117 void discardCommand(redisClient *c);
1118 void blpopCommand(redisClient *c);
1119 void brpopCommand(redisClient *c);
1120 void brpoplpushCommand(redisClient *c);
1121 void appendCommand(redisClient *c);
1122 void strlenCommand(redisClient *c);
1123 void zrankCommand(redisClient *c);
1124 void zrevrankCommand(redisClient *c);
1125 void hsetCommand(redisClient *c);
1126 void hsetnxCommand(redisClient *c);
1127 void hgetCommand(redisClient *c);
1128 void hmsetCommand(redisClient *c);
1129 void hmgetCommand(redisClient *c);
1130 void hdelCommand(redisClient *c);
1131 void hlenCommand(redisClient *c);
1132 void zremrangebyrankCommand(redisClient *c);
1133 void zunionstoreCommand(redisClient *c);
1134 void zinterstoreCommand(redisClient *c);
1135 void hkeysCommand(redisClient *c);
1136 void hvalsCommand(redisClient *c);
1137 void hgetallCommand(redisClient *c);
1138 void hexistsCommand(redisClient *c);
1139 void configCommand(redisClient *c);
1140 void hincrbyCommand(redisClient *c);
1141 void subscribeCommand(redisClient *c);
1142 void unsubscribeCommand(redisClient *c);
1143 void psubscribeCommand(redisClient *c);
1144 void punsubscribeCommand(redisClient *c);
1145 void publishCommand(redisClient *c);
1146 void watchCommand(redisClient *c);
1147 void unwatchCommand(redisClient *c);
1148 void clusterCommand(redisClient *c);
1149 void restoreCommand(redisClient *c);
1150 void migrateCommand(redisClient *c);
1151 void dumpCommand(redisClient *c);
1152 void objectCommand(redisClient *c);
1153 void clientCommand(redisClient *c);
1154
1155 #if defined(__GNUC__)
1156 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1157 void free(void *ptr) __attribute__ ((deprecated));
1158 void *malloc(size_t size) __attribute__ ((deprecated));
1159 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1160 #endif
1161
1162 #endif