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 #include <lua.h>
  23
  24 #include "ae.h"     /* Event driven programming library */
  25 #include "sds.h"    /* Dynamic safe strings */
  26 #include "dict.h"   /* Hash tables */
  27 #include "adlist.h" /* Linked lists */
  28 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  29 #include "anet.h"   /* Networking the easy way */
  30 #include "zipmap.h" /* Compact string -> string data structure */
  31 #include "ziplist.h" /* Compact list data structure */
  32 #include "intset.h" /* Compact integer set structure */
  33 #include "version.h"
  34 #include "util.h"
  35
  36 /* Error codes */
  37 #define REDIS_OK                0
  38 #define REDIS_ERR               -1
  39
  40 /* Static server configuration */
  41 #define REDIS_SERVERPORT        6379    /* TCP port */
  42 #define REDIS_MAXIDLETIME       (60*5)  /* default client timeout */
  43 #define REDIS_IOBUF_LEN         1024
  44 #define REDIS_LOADBUF_LEN       1024
  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 #define REDIS_AUTO_AOFREWRITE_PERC  100
  55 #define REDIS_AUTO_AOFREWRITE_MIN_SIZE (1024*1024)
  56
  57 /* Hash table parameters */
  58 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  59
  60 /* Command flags:
  61  *   REDIS_CMD_DENYOOM:
  62  *     Commands marked with this flag will return an error when 'maxmemory' is
  63  *     set and the server is using more than 'maxmemory' bytes of memory.
  64  *     In short: commands with this flag are denied on low memory conditions.
  65  *   REDIS_CMD_FORCE_REPLICATION:
  66  *     Force replication even if dirty is 0. */
  67 #define REDIS_CMD_DENYOOM 4
  68 #define REDIS_CMD_FORCE_REPLICATION 8
  69
  70 /* Object types */
  71 #define REDIS_STRING 0
  72 #define REDIS_LIST 1
  73 #define REDIS_SET 2
  74 #define REDIS_ZSET 3
  75 #define REDIS_HASH 4
  76 #define REDIS_VMPOINTER 8
  77
  78 /* Object types only used for persistence in .rdb files */
  79 #define REDIS_HASH_ZIPMAP 9
  80 #define REDIS_LIST_ZIPLIST 10
  81 #define REDIS_SET_INTSET 11
  82 #define REDIS_ZSET_ZIPLIST 12
  83
  84 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  85  * internally represented in multiple ways. The 'encoding' field of the object
  86  * is set to one of this fields for this object. */
  87 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  88 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  89 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  90 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  91 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  92 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  93 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  94 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  95
  96 /* Object types only used for dumping to disk */
  97 #define REDIS_EXPIRETIME 253
  98 #define REDIS_SELECTDB 254
  99 #define REDIS_EOF 255
 100
 101 /* Defines related to the dump file format. To store 32 bits lengths for short
 102  * keys requires a lot of space, so we check the most significant 2 bits of
 103  * the first byte to interpreter the length:
 104  *
 105  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 106  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 107  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 108  * 11|000000 this means: specially encoded object will follow. The six bits
 109  *           number specify the kind of object that follows.
 110  *           See the REDIS_RDB_ENC_* defines.
 111  *
 112  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 113  * values, will fit inside. */
 114 #define REDIS_RDB_6BITLEN 0
 115 #define REDIS_RDB_14BITLEN 1
 116 #define REDIS_RDB_32BITLEN 2
 117 #define REDIS_RDB_ENCVAL 3
 118 #define REDIS_RDB_LENERR UINT_MAX
 119
 120 /* When a length of a string object stored on disk has the first two bits
 121  * set, the remaining two bits specify a special encoding for the object
 122  * accordingly to the following defines: */
 123 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 124 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 125 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 126 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 127
 128 /* Client flags */
 129 #define REDIS_SLAVE 1       /* This client is a slave server */
 130 #define REDIS_MASTER 2      /* This client is a master server */
 131 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 132 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 133 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 134 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 135 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 136 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 137                                server.unblocked_clients */
 138 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 139
 140 /* Client request types */
 141 #define REDIS_REQ_INLINE 1
 142 #define REDIS_REQ_MULTIBULK 2
 143
 144 /* Slave replication state - slave side */
 145 #define REDIS_REPL_NONE 0 /* No active replication */
 146 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
 147 #define REDIS_REPL_CONNECTING 2 /* Connecting to master */
 148 #define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
 149 #define REDIS_REPL_CONNECTED 4 /* Connected to master */
 150
 151 /* Synchronous read timeout - slave side */
 152 #define REDIS_REPL_SYNCIO_TIMEOUT 5
 153
 154 /* Slave replication state - from the point of view of master
 155  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 156  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 157  * to start the next background saving in order to send updates to it. */
 158 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 159 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 160 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 161 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 162
 163 /* List related stuff */
 164 #define REDIS_HEAD 0
 165 #define REDIS_TAIL 1
 166
 167 /* Sort operations */
 168 #define REDIS_SORT_GET 0
 169 #define REDIS_SORT_ASC 1
 170 #define REDIS_SORT_DESC 2
 171 #define REDIS_SORTKEY_MAX 1024
 172
 173 /* Log levels */
 174 #define REDIS_DEBUG 0
 175 #define REDIS_VERBOSE 1
 176 #define REDIS_NOTICE 2
 177 #define REDIS_WARNING 3
 178 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 179
 180 /* Anti-warning macro... */
 181 #define REDIS_NOTUSED(V) ((void) V)
 182
 183 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 184 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 185
 186 /* Append only defines */
 187 #define APPENDFSYNC_NO 0
 188 #define APPENDFSYNC_ALWAYS 1
 189 #define APPENDFSYNC_EVERYSEC 2
 190
 191 /* Zip structure related defaults */
 192 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 193 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 194 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 195 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 196 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 197 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 198 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 199
 200 /* Sets operations codes */
 201 #define REDIS_OP_UNION 0
 202 #define REDIS_OP_DIFF 1
 203 #define REDIS_OP_INTER 2
 204
 205 /* Redis maxmemory strategies */
 206 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 207 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 208 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 209 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 210 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 211 #define REDIS_MAXMEMORY_NO_EVICTION 5
 212
 213 /* Scripting */
 214 #define REDIS_LUA_TIME_LIMIT 60000 /* milliseconds */
 215
 216 /* We can print the stacktrace, so our assert is defined this way: */
 217 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 218 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 219 void _redisAssert(char *estr, char *file, int line);
 220 void _redisPanic(char *msg, char *file, int line);
 221
 222 /*-----------------------------------------------------------------------------
 223  * Data types
 224  *----------------------------------------------------------------------------*/
 225
 226 /* A redis object, that is a type able to hold a string / list / set */
 227
 228 /* The actual Redis Object */
 229 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 230 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 231 typedef struct redisObject {
 232     unsigned type:4;
 233     unsigned notused:2;     /* Not used */
 234     unsigned encoding:4;
 235     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 236     int refcount;
 237     void *ptr;
 238     /* VM fields are only allocated if VM is active, otherwise the
 239      * object allocation function will just allocate
 240      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 241      * Redis without VM active will not have any overhead. */
 242 } robj;
 243
 244 /* The VM pointer structure - identifies an object in the swap file.
 245  *
 246  * This object is stored in place of the value
 247  * object in the main key->value hash table representing a database.
 248  * Note that the first fields (type, storage) are the same as the redisObject
 249  * structure so that vmPointer strucuters can be accessed even when casted
 250  * as redisObject structures.
 251  *
 252  * This is useful as we don't know if a value object is or not on disk, but we
 253  * are always able to read obj->storage to check this. For vmPointer
 254  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 255  * is still possible to check the kind of object from the value of 'storage').*/
 256 typedef struct vmPointer {
 257     unsigned type:4;
 258     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 259     unsigned notused:26;
 260     unsigned int vtype; /* type of the object stored in the swap file */
 261     off_t page;         /* the page at witch the object is stored on disk */
 262     off_t usedpages;    /* number of pages used on disk */
 263 } vmpointer;
 264
 265 /* Macro used to initalize a Redis object allocated on the stack.
 266  * Note that this macro is taken near the structure definition to make sure
 267  * we'll update it when the structure is changed, to avoid bugs like
 268  * bug #85 introduced exactly in this way. */
 269 #define initStaticStringObject(_var,_ptr) do { \
 270     _var.refcount = 1; \
 271     _var.type = REDIS_STRING; \
 272     _var.encoding = REDIS_ENCODING_RAW; \
 273     _var.ptr = _ptr; \
 274 } while(0);
 275
 276 typedef struct redisDb {
 277     dict *dict;                 /* The keyspace for this DB */
 278     dict *expires;              /* Timeout of keys with a timeout set */
 279     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 280     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 281     int id;
 282 } redisDb;
 283
 284 /* Client MULTI/EXEC state */
 285 typedef struct multiCmd {
 286     robj **argv;
 287     int argc;
 288     struct redisCommand *cmd;
 289 } multiCmd;
 290
 291 typedef struct multiState {
 292     multiCmd *commands;     /* Array of MULTI commands */
 293     int count;              /* Total number of MULTI commands */
 294 } multiState;
 295
 296 typedef struct blockingState {
 297     robj **keys;            /* The key we are waiting to terminate a blocking
 298                              * operation such as BLPOP. Otherwise NULL. */
 299     int count;              /* Number of blocking keys */
 300     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 301                              * is >= timeout then the operation timed out. */
 302     robj *target;           /* The key that should receive the element,
 303                              * for BRPOPLPUSH. */
 304 } blockingState;
 305
 306 /* With multiplexing we need to take per-clinet state.
 307  * Clients are taken in a liked list. */
 308 typedef struct redisClient {
 309     int fd;
 310     redisDb *db;
 311     int dictid;
 312     sds querybuf;
 313     int argc;
 314     robj **argv;
 315     int reqtype;
 316     int multibulklen;       /* number of multi bulk arguments left to read */
 317     long bulklen;           /* length of bulk argument in multi bulk request */
 318     list *reply;
 319     int sentlen;
 320     time_t lastinteraction; /* time of the last interaction, used for timeout */
 321     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 322     int slaveseldb;         /* slave selected db, if this client is a slave */
 323     int authenticated;      /* when requirepass is non-NULL */
 324     int replstate;          /* replication state if this is a slave */
 325     int repldbfd;           /* replication DB file descriptor */
 326     long repldboff;         /* replication DB file offset */
 327     off_t repldbsize;       /* replication DB file size */
 328     multiState mstate;      /* MULTI/EXEC state */
 329     blockingState bpop;   /* blocking state */
 330     list *io_keys;          /* Keys this client is waiting to be loaded from the
 331                              * swap file in order to continue. */
 332     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 333     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 334     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 335
 336     /* Response buffer */
 337     int bufpos;
 338     char buf[REDIS_REPLY_CHUNK_BYTES];
 339 } redisClient;
 340
 341 struct saveparam {
 342     time_t seconds;
 343     int changes;
 344 };
 345
 346 struct sharedObjectsStruct {
 347     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 348     *colon, *nullbulk, *nullmultibulk, *queued,
 349     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 350     *outofrangeerr, *noscripterr, *loadingerr, *plus,
 351     *select0, *select1, *select2, *select3, *select4,
 352     *select5, *select6, *select7, *select8, *select9,
 353     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 354     *mbulk4, *psubscribebulk, *punsubscribebulk,
 355     *integers[REDIS_SHARED_INTEGERS];
 356 };
 357
 358 /* ZSETs use a specialized version of Skiplists */
 359 typedef struct zskiplistNode {
 360     robj *obj;
 361     double score;
 362     struct zskiplistNode *backward;
 363     struct zskiplistLevel {
 364         struct zskiplistNode *forward;
 365         unsigned int span;
 366     } level[];
 367 } zskiplistNode;
 368
 369 typedef struct zskiplist {
 370     struct zskiplistNode *header, *tail;
 371     unsigned long length;
 372     int level;
 373 } zskiplist;
 374
 375 typedef struct zset {
 376     dict *dict;
 377     zskiplist *zsl;
 378 } zset;
 379
 380 /*-----------------------------------------------------------------------------
 381  * Redis cluster data structures
 382  *----------------------------------------------------------------------------*/
 383
 384 #define REDIS_CLUSTER_SLOTS 4096
 385 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 386 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 387 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 388 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 389 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 390
 391 struct clusterNode;
 392
 393 /* clusterLink encapsulates everything needed to talk with a remote node. */
 394 typedef struct clusterLink {
 395     int fd;                     /* TCP socket file descriptor */
 396     sds sndbuf;                 /* Packet send buffer */
 397     sds rcvbuf;                 /* Packet reception buffer */
 398     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 399 } clusterLink;
 400
 401 /* Node flags */
 402 #define REDIS_NODE_MASTER 1     /* The node is a master */
 403 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 404 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 405 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 406 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 407 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 408 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 409 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 410 #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"
 411
 412 struct clusterNode {
 413     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 414     int flags;      /* REDIS_NODE_... */
 415     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 416     int numslaves;  /* Number of slave nodes, if this is a master */
 417     struct clusterNode **slaves; /* pointers to slave nodes */
 418     struct clusterNode *slaveof; /* pointer to the master node */
 419     time_t ping_sent;       /* Unix time we sent latest ping */
 420     time_t pong_received;   /* Unix time we received the pong */
 421     char *configdigest;         /* Configuration digest of this node */
 422     time_t configdigest_ts;     /* Configuration digest timestamp */
 423     char ip[16];                /* Latest known IP address of this node */
 424     int port;                   /* Latest known port of this node */
 425     clusterLink *link;          /* TCP/IP link with this node */
 426 };
 427 typedef struct clusterNode clusterNode;
 428
 429 typedef struct {
 430     char *configfile;
 431     clusterNode *myself;  /* This node */
 432     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 433     int node_timeout;
 434     dict *nodes;          /* Hash table of name -> clusterNode structures */
 435     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 436     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 437     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 438     zskiplist *slots_to_keys;
 439 } clusterState;
 440
 441 /* Redis cluster messages header */
 442
 443 /* Note that the PING, PONG and MEET messages are actually the same exact
 444  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 445  * while MEET is a special PING that forces the receiver to add the sender
 446  * as a node (if it is not already in the list). */
 447 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 448 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 449 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 450 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 451
 452 /* Initially we don't know our "name", but we'll find it once we connect
 453  * to the first node, using the getsockname() function. Then we'll use this
 454  * address for all the next messages. */
 455 typedef struct {
 456     char nodename[REDIS_CLUSTER_NAMELEN];
 457     uint32_t ping_sent;
 458     uint32_t pong_received;
 459     char ip[16];    /* IP address last time it was seen */
 460     uint16_t port;  /* port last time it was seen */
 461     uint16_t flags;
 462     uint32_t notused; /* for 64 bit alignment */
 463 } clusterMsgDataGossip;
 464
 465 typedef struct {
 466     char nodename[REDIS_CLUSTER_NAMELEN];
 467 } clusterMsgDataFail;
 468
 469 union clusterMsgData {
 470     /* PING, MEET and PONG */
 471     struct {
 472         /* Array of N clusterMsgDataGossip structures */
 473         clusterMsgDataGossip gossip[1];
 474     } ping;
 475     /* FAIL */
 476     struct {
 477         clusterMsgDataFail about;
 478     } fail;
 479 };
 480
 481 typedef struct {
 482     uint32_t totlen;    /* Total length of this message */
 483     uint16_t type;      /* Message type */
 484     uint16_t count;     /* Only used for some kind of messages. */
 485     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 486     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 487     char slaveof[REDIS_CLUSTER_NAMELEN];
 488     char configdigest[32];
 489     uint16_t port;      /* Sender TCP base port */
 490     unsigned char state; /* Cluster state from the POV of the sender */
 491     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 492     union clusterMsgData data;
 493 } clusterMsg;
 494
 495 /*-----------------------------------------------------------------------------
 496  * Global server state
 497  *----------------------------------------------------------------------------*/
 498
 499 struct redisServer {
 500     /* General */
 501     redisDb *db;
 502     dict *commands;             /* Command table hahs table */
 503     aeEventLoop *el;
 504     /* Networking */
 505     int port;
 506     char *bindaddr;
 507     char *unixsocket;
 508     int ipfd;
 509     int sofd;
 510     int cfd;
 511     list *clients;
 512     list *slaves, *monitors;
 513     char neterr[ANET_ERR_LEN];
 514     /* RDB / AOF loading information */
 515     int loading;
 516     off_t loading_total_bytes;
 517     off_t loading_loaded_bytes;
 518     time_t loading_start_time;
 519     /* Fast pointers to often looked up command */
 520     struct redisCommand *delCommand, *multiCommand;
 521     int cronloops;              /* number of times the cron function run */
 522     time_t lastsave;                /* Unix time of last save succeeede */
 523     /* Fields used only for stats */
 524     time_t stat_starttime;          /* server start time */
 525     long long stat_numcommands;     /* number of processed commands */
 526     long long stat_numconnections;  /* number of connections received */
 527     long long stat_expiredkeys;     /* number of expired keys */
 528     long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */
 529     long long stat_keyspace_hits;   /* number of successful lookups of keys */
 530     long long stat_keyspace_misses; /* number of failed lookups of keys */
 531     size_t stat_peak_memory;        /* max used memory record */
 532     long long stat_fork_time;       /* time needed to perform latets fork() */
 533     /* Configuration */
 534     int verbosity;
 535     int maxidletime;
 536     int dbnum;
 537     int daemonize;
 538     int appendonly;
 539     int appendfsync;
 540     int no_appendfsync_on_rewrite;
 541     int auto_aofrewrite_perc;       /* Rewrite AOF if % growth is > M and... */
 542     off_t auto_aofrewrite_min_size; /* the AOF file is at least N bytes. */
 543     off_t auto_aofrewrite_base_size;/* AOF size on latest startup or rewrite. */
 544     off_t appendonly_current_size;  /* AOF current size. */
 545     int aofrewrite_scheduled;       /* Rewrite once BGSAVE terminates. */
 546     int shutdown_asap;
 547     int activerehashing;
 548     char *requirepass;
 549     /* Persistence */
 550     long long dirty;            /* changes to DB from the last save */
 551     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 552     time_t lastfsync;
 553     int appendfd;
 554     int appendseldb;
 555     char *pidfile;
 556     pid_t bgsavechildpid;
 557     pid_t bgrewritechildpid;
 558     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 559     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 560     struct saveparam *saveparams;
 561     int saveparamslen;
 562     char *dbfilename;
 563     int rdbcompression;
 564     char *appendfilename;
 565     /* Logging */
 566     char *logfile;
 567     int syslog_enabled;
 568     char *syslog_ident;
 569     int syslog_facility;
 570     /* Replication related */
 571     int isslave;
 572     /* Slave specific fields */
 573     char *masterauth;
 574     char *masterhost;
 575     int masterport;
 576     redisClient *master;    /* client that is master for this slave */
 577     int repl_syncio_timeout; /* timeout for synchronous I/O calls */
 578     int replstate;          /* replication status if the instance is a slave */
 579     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 580     int repl_transfer_s;    /* slave -> master SYNC socket */
 581     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 582     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 583     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 584     int repl_serve_stale_data; /* Serve stale data when link is down? */
 585     time_t repl_down_since; /* unix time at which link with master went down */
 586     /* Limits */
 587     unsigned int maxclients;
 588     unsigned long long maxmemory;
 589     int maxmemory_policy;
 590     int maxmemory_samples;
 591     /* Blocked clients */
 592     unsigned int bpop_blocked_clients;
 593     list *unblocked_clients; /* list of clients to unblock before next loop */
 594     /* Sort parameters - qsort_r() is only available under BSD so we
 595      * have to take this state global, in order to pass it to sortCompare() */
 596     int sort_desc;
 597     int sort_alpha;
 598     int sort_bypattern;
 599     /* Zip structure config */
 600     size_t hash_max_zipmap_entries;
 601     size_t hash_max_zipmap_value;
 602     size_t list_max_ziplist_entries;
 603     size_t list_max_ziplist_value;
 604     size_t set_max_intset_entries;
 605     size_t zset_max_ziplist_entries;
 606     size_t zset_max_ziplist_value;
 607     time_t unixtime;    /* Unix time sampled every second. */
 608     /* Virtual memory I/O threads stuff */
 609     /* An I/O thread process an element taken from the io_jobs queue and
 610      * put the result of the operation in the io_done list. While the
 611      * job is being processed, it's put on io_processing queue. */
 612     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 613     list *io_processing; /* List of VM I/O jobs being processed */
 614     list *io_processed; /* List of VM I/O jobs already processed */
 615     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 616     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 617     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 618     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 619     int io_active_threads; /* Number of running I/O threads */
 620     int vm_max_threads; /* Max number of I/O threads running at the same time */
 621     /* Our main thread is blocked on the event loop, locking for sockets ready
 622      * to be read or written, so when a threaded I/O operation is ready to be
 623      * processed by the main thread, the I/O thread will use a unix pipe to
 624      * awake the main thread. The followings are the two pipe FDs. */
 625     int io_ready_pipe_read;
 626     int io_ready_pipe_write;
 627     /* Virtual memory stats */
 628     unsigned long long vm_stats_used_pages;
 629     unsigned long long vm_stats_swapped_objects;
 630     unsigned long long vm_stats_swapouts;
 631     unsigned long long vm_stats_swapins;
 632     /* Pubsub */
 633     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 634     list *pubsub_patterns; /* A list of pubsub_patterns */
 635     /* Misc */
 636     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 637     unsigned lruclock_padding:10;
 638     /* Cluster */
 639     int cluster_enabled;
 640     clusterState cluster;
 641     /* Scripting */
 642     lua_State *lua;
 643     redisClient *lua_client;
 644     long long lua_time_limit;
 645     long long lua_time_start;
 646 };
 647
 648 typedef struct pubsubPattern {
 649     redisClient *client;
 650     robj *pattern;
 651 } pubsubPattern;
 652
 653 typedef void redisCommandProc(redisClient *c);
 654 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 655 struct redisCommand {
 656     char *name;
 657     redisCommandProc *proc;
 658     int arity;
 659     int flags;
 660     /* Use a function to determine keys arguments in a command line.
 661      * Used for Redis Cluster redirect. */
 662     redisGetKeysProc *getkeys_proc;
 663     /* What keys should be loaded in background when calling this command? */
 664     int firstkey; /* The first argument that's a key (0 = no keys) */
 665     int lastkey;  /* THe last argument that's a key */
 666     int keystep;  /* The step between first and last key */
 667     long long microseconds, calls;
 668 };
 669
 670 struct redisFunctionSym {
 671     char *name;
 672     unsigned long pointer;
 673 };
 674
 675 typedef struct _redisSortObject {
 676     robj *obj;
 677     union {
 678         double score;
 679         robj *cmpobj;
 680     } u;
 681 } redisSortObject;
 682
 683 typedef struct _redisSortOperation {
 684     int type;
 685     robj *pattern;
 686 } redisSortOperation;
 687
 688 /* Structure to hold list iteration abstraction. */
 689 typedef struct {
 690     robj *subject;
 691     unsigned char encoding;
 692     unsigned char direction; /* Iteration direction */
 693     unsigned char *zi;
 694     listNode *ln;
 695 } listTypeIterator;
 696
 697 /* Structure for an entry while iterating over a list. */
 698 typedef struct {
 699     listTypeIterator *li;
 700     unsigned char *zi;  /* Entry in ziplist */
 701     listNode *ln;       /* Entry in linked list */
 702 } listTypeEntry;
 703
 704 /* Structure to hold set iteration abstraction. */
 705 typedef struct {
 706     robj *subject;
 707     int encoding;
 708     int ii; /* intset iterator */
 709     dictIterator *di;
 710 } setTypeIterator;
 711
 712 /* Structure to hold hash iteration abstration. Note that iteration over
 713  * hashes involves both fields and values. Because it is possible that
 714  * not both are required, store pointers in the iterator to avoid
 715  * unnecessary memory allocation for fields/values. */
 716 typedef struct {
 717     int encoding;
 718     unsigned char *zi;
 719     unsigned char *zk, *zv;
 720     unsigned int zklen, zvlen;
 721
 722     dictIterator *di;
 723     dictEntry *de;
 724 } hashTypeIterator;
 725
 726 #define REDIS_HASH_KEY 1
 727 #define REDIS_HASH_VALUE 2
 728
 729 /*-----------------------------------------------------------------------------
 730  * Extern declarations
 731  *----------------------------------------------------------------------------*/
 732
 733 extern struct redisServer server;
 734 extern struct sharedObjectsStruct shared;
 735 extern dictType setDictType;
 736 extern dictType zsetDictType;
 737 extern dictType clusterNodesDictType;
 738 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 739 dictType hashDictType;
 740
 741 /*-----------------------------------------------------------------------------
 742  * Functions prototypes
 743  *----------------------------------------------------------------------------*/
 744
 745 /* Utils */
 746 long long ustime(void);
 747
 748 /* networking.c -- Networking and Client related operations */
 749 redisClient *createClient(int fd);
 750 void closeTimedoutClients(void);
 751 void freeClient(redisClient *c);
 752 void resetClient(redisClient *c);
 753 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 754 void addReply(redisClient *c, robj *obj);
 755 void *addDeferredMultiBulkLength(redisClient *c);
 756 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 757 void addReplySds(redisClient *c, sds s);
 758 void processInputBuffer(redisClient *c);
 759 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 760 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 761 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 762 void addReplyBulk(redisClient *c, robj *obj);
 763 void addReplyBulkCString(redisClient *c, char *s);
 764 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 765 void addReplyBulkLongLong(redisClient *c, long long ll);
 766 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 767 void addReply(redisClient *c, robj *obj);
 768 void addReplySds(redisClient *c, sds s);
 769 void addReplyError(redisClient *c, char *err);
 770 void addReplyStatus(redisClient *c, char *status);
 771 void addReplyDouble(redisClient *c, double d);
 772 void addReplyLongLong(redisClient *c, long long ll);
 773 void addReplyMultiBulkLen(redisClient *c, long length);
 774 void *dupClientReplyValue(void *o);
 775 void getClientsMaxBuffers(unsigned long *longest_output_list,
 776                           unsigned long *biggest_input_buffer);
 777 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 778
 779 #ifdef __GNUC__
 780 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 781     __attribute__((format(printf, 2, 3)));
 782 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 783     __attribute__((format(printf, 2, 3)));
 784 #else
 785 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 786 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 787 #endif
 788
 789 /* List data type */
 790 void listTypeTryConversion(robj *subject, robj *value);
 791 void listTypePush(robj *subject, robj *value, int where);
 792 robj *listTypePop(robj *subject, int where);
 793 unsigned long listTypeLength(robj *subject);
 794 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 795 void listTypeReleaseIterator(listTypeIterator *li);
 796 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 797 robj *listTypeGet(listTypeEntry *entry);
 798 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 799 int listTypeEqual(listTypeEntry *entry, robj *o);
 800 void listTypeDelete(listTypeEntry *entry);
 801 void listTypeConvert(robj *subject, int enc);
 802 void unblockClientWaitingData(redisClient *c);
 803 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 804 void popGenericCommand(redisClient *c, int where);
 805
 806 /* MULTI/EXEC/WATCH... */
 807 void unwatchAllKeys(redisClient *c);
 808 void initClientMultiState(redisClient *c);
 809 void freeClientMultiState(redisClient *c);
 810 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
 811 void touchWatchedKey(redisDb *db, robj *key);
 812 void touchWatchedKeysOnFlush(int dbid);
 813
 814 /* Redis object implementation */
 815 void decrRefCount(void *o);
 816 void incrRefCount(robj *o);
 817 void freeStringObject(robj *o);
 818 void freeListObject(robj *o);
 819 void freeSetObject(robj *o);
 820 void freeZsetObject(robj *o);
 821 void freeHashObject(robj *o);
 822 robj *createObject(int type, void *ptr);
 823 robj *createStringObject(char *ptr, size_t len);
 824 robj *dupStringObject(robj *o);
 825 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 826 robj *tryObjectEncoding(robj *o);
 827 robj *getDecodedObject(robj *o);
 828 size_t stringObjectLen(robj *o);
 829 robj *createStringObjectFromLongLong(long long value);
 830 robj *createListObject(void);
 831 robj *createZiplistObject(void);
 832 robj *createSetObject(void);
 833 robj *createIntsetObject(void);
 834 robj *createHashObject(void);
 835 robj *createZsetObject(void);
 836 robj *createZsetZiplistObject(void);
 837 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 838 int checkType(redisClient *c, robj *o, int type);
 839 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 840 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 841 int getLongLongFromObject(robj *o, long long *target);
 842 char *strEncoding(int encoding);
 843 int compareStringObjects(robj *a, robj *b);
 844 int equalStringObjects(robj *a, robj *b);
 845 unsigned long estimateObjectIdleTime(robj *o);
 846
 847 /* Synchronous I/O with timeout */
 848 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 849 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 850 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 851 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 852 int fwriteBulkDouble(FILE *fp, double d);
 853 int fwriteBulkLongLong(FILE *fp, long long l);
 854 int fwriteBulkObject(FILE *fp, robj *obj);
 855 int fwriteBulkCount(FILE *fp, char prefix, int count);
 856
 857 /* Replication */
 858 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 859 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 860 void updateSlavesWaitingBgsave(int bgsaveerr);
 861 void replicationCron(void);
 862
 863 /* Generic persistence functions */
 864 void startLoading(FILE *fp);
 865 void loadingProgress(off_t pos);
 866 void stopLoading(void);
 867
 868 /* RDB persistence */
 869 int rdbLoad(char *filename);
 870 int rdbSaveBackground(char *filename);
 871 void rdbRemoveTempFile(pid_t childpid);
 872 int rdbSave(char *filename);
 873 int rdbSaveObject(FILE *fp, robj *o);
 874 off_t rdbSavedObjectLen(robj *o);
 875 off_t rdbSavedObjectPages(robj *o);
 876 robj *rdbLoadObject(int type, FILE *fp);
 877 void backgroundSaveDoneHandler(int exitcode, int bysignal);
 878 int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val, time_t expireitme, time_t now);
 879 int rdbLoadType(FILE *fp);
 880 time_t rdbLoadTime(FILE *fp);
 881 robj *rdbLoadStringObject(FILE *fp);
 882 int rdbSaveType(FILE *fp, unsigned char type);
 883 int rdbSaveLen(FILE *fp, uint32_t len);
 884
 885 /* AOF persistence */
 886 void flushAppendOnlyFile(void);
 887 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 888 void aofRemoveTempFile(pid_t childpid);
 889 int rewriteAppendOnlyFileBackground(void);
 890 int loadAppendOnlyFile(char *filename);
 891 void stopAppendOnly(void);
 892 int startAppendOnly(void);
 893 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 894
 895 /* Sorted sets data type */
 896
 897 /* Struct to hold a inclusive/exclusive range spec. */
 898 typedef struct {
 899     double min, max;
 900     int minex, maxex; /* are min or max exclusive? */
 901 } zrangespec;
 902
 903 zskiplist *zslCreate(void);
 904 void zslFree(zskiplist *zsl);
 905 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 906 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 907 int zslDelete(zskiplist *zsl, double score, robj *obj);
 908 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 909 double zzlGetScore(unsigned char *sptr);
 910 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 911 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 912 unsigned int zsetLength(robj *zobj);
 913 void zsetConvert(robj *zobj, int encoding);
 914
 915 /* Core functions */
 916 void freeMemoryIfNeeded(void);
 917 int processCommand(redisClient *c);
 918 void setupSignalHandlers(void);
 919 struct redisCommand *lookupCommand(sds name);
 920 struct redisCommand *lookupCommandByCString(char *s);
 921 void call(redisClient *c, struct redisCommand *cmd);
 922 int prepareForShutdown();
 923 void redisLog(int level, const char *fmt, ...);
 924 void redisLogRaw(int level, const char *msg);
 925 void usage();
 926 void updateDictResizePolicy(void);
 927 int htNeedsResize(dict *dict);
 928 void oom(const char *msg);
 929 void populateCommandTable(void);
 930 void resetCommandTableStats(void);
 931
 932 /* Set data type */
 933 robj *setTypeCreate(robj *value);
 934 int setTypeAdd(robj *subject, robj *value);
 935 int setTypeRemove(robj *subject, robj *value);
 936 int setTypeIsMember(robj *subject, robj *value);
 937 setTypeIterator *setTypeInitIterator(robj *subject);
 938 void setTypeReleaseIterator(setTypeIterator *si);
 939 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 940 robj *setTypeNextObject(setTypeIterator *si);
 941 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 942 unsigned long setTypeSize(robj *subject);
 943 void setTypeConvert(robj *subject, int enc);
 944
 945 /* Hash data type */
 946 void convertToRealHash(robj *o);
 947 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 948 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 949 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 950 robj *hashTypeGetObject(robj *o, robj *key);
 951 int hashTypeExists(robj *o, robj *key);
 952 int hashTypeSet(robj *o, robj *key, robj *value);
 953 int hashTypeDelete(robj *o, robj *key);
 954 unsigned long hashTypeLength(robj *o);
 955 hashTypeIterator *hashTypeInitIterator(robj *subject);
 956 void hashTypeReleaseIterator(hashTypeIterator *hi);
 957 int hashTypeNext(hashTypeIterator *hi);
 958 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 959 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 960 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 961
 962 /* Pub / Sub */
 963 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 964 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 965 void freePubsubPattern(void *p);
 966 int listMatchPubsubPattern(void *a, void *b);
 967
 968 /* Configuration */
 969 void loadServerConfig(char *filename);
 970 void appendServerSaveParams(time_t seconds, int changes);
 971 void resetServerSaveParams();
 972
 973 /* db.c -- Keyspace access API */
 974 int removeExpire(redisDb *db, robj *key);
 975 void propagateExpire(redisDb *db, robj *key);
 976 int expireIfNeeded(redisDb *db, robj *key);
 977 time_t getExpire(redisDb *db, robj *key);
 978 void setExpire(redisDb *db, robj *key, time_t when);
 979 robj *lookupKey(redisDb *db, robj *key);
 980 robj *lookupKeyRead(redisDb *db, robj *key);
 981 robj *lookupKeyWrite(redisDb *db, robj *key);
 982 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 983 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 984 void dbAdd(redisDb *db, robj *key, robj *val);
 985 void dbOverwrite(redisDb *db, robj *key, robj *val);
 986 void setKey(redisDb *db, robj *key, robj *val);
 987 int dbExists(redisDb *db, robj *key);
 988 robj *dbRandomKey(redisDb *db);
 989 int dbDelete(redisDb *db, robj *key);
 990 long long emptyDb();
 991 int selectDb(redisClient *c, int id);
 992 void signalModifiedKey(redisDb *db, robj *key);
 993 void signalFlushedDb(int dbid);
 994 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
 995
 996 /* API to get key arguments from commands */
 997 #define REDIS_GETKEYS_ALL 0
 998 #define REDIS_GETKEYS_PRELOAD 1
 999 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1000 void getKeysFreeResult(int *result);
1001 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1002 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1003 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1004
1005 /* Cluster */
1006 void clusterInit(void);
1007 unsigned short crc16(const char *buf, int len);
1008 unsigned int keyHashSlot(char *key, int keylen);
1009 clusterNode *createClusterNode(char *nodename, int flags);
1010 int clusterAddNode(clusterNode *node);
1011 void clusterCron(void);
1012 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1013
1014 /* Scripting */
1015 void scriptingInit(void);
1016
1017 /* Git SHA1 */
1018 char *redisGitSHA1(void);
1019 char *redisGitDirty(void);
1020
1021 /* Commands prototypes */
1022 void authCommand(redisClient *c);
1023 void pingCommand(redisClient *c);
1024 void echoCommand(redisClient *c);
1025 void setCommand(redisClient *c);
1026 void setnxCommand(redisClient *c);
1027 void setexCommand(redisClient *c);
1028 void getCommand(redisClient *c);
1029 void delCommand(redisClient *c);
1030 void existsCommand(redisClient *c);
1031 void setbitCommand(redisClient *c);
1032 void getbitCommand(redisClient *c);
1033 void setrangeCommand(redisClient *c);
1034 void getrangeCommand(redisClient *c);
1035 void incrCommand(redisClient *c);
1036 void decrCommand(redisClient *c);
1037 void incrbyCommand(redisClient *c);
1038 void decrbyCommand(redisClient *c);
1039 void selectCommand(redisClient *c);
1040 void randomkeyCommand(redisClient *c);
1041 void keysCommand(redisClient *c);
1042 void dbsizeCommand(redisClient *c);
1043 void lastsaveCommand(redisClient *c);
1044 void saveCommand(redisClient *c);
1045 void bgsaveCommand(redisClient *c);
1046 void bgrewriteaofCommand(redisClient *c);
1047 void shutdownCommand(redisClient *c);
1048 void moveCommand(redisClient *c);
1049 void renameCommand(redisClient *c);
1050 void renamenxCommand(redisClient *c);
1051 void lpushCommand(redisClient *c);
1052 void rpushCommand(redisClient *c);
1053 void lpushxCommand(redisClient *c);
1054 void rpushxCommand(redisClient *c);
1055 void linsertCommand(redisClient *c);
1056 void lpopCommand(redisClient *c);
1057 void rpopCommand(redisClient *c);
1058 void llenCommand(redisClient *c);
1059 void lindexCommand(redisClient *c);
1060 void lrangeCommand(redisClient *c);
1061 void ltrimCommand(redisClient *c);
1062 void typeCommand(redisClient *c);
1063 void lsetCommand(redisClient *c);
1064 void saddCommand(redisClient *c);
1065 void sremCommand(redisClient *c);
1066 void smoveCommand(redisClient *c);
1067 void sismemberCommand(redisClient *c);
1068 void scardCommand(redisClient *c);
1069 void spopCommand(redisClient *c);
1070 void srandmemberCommand(redisClient *c);
1071 void sinterCommand(redisClient *c);
1072 void sinterstoreCommand(redisClient *c);
1073 void sunionCommand(redisClient *c);
1074 void sunionstoreCommand(redisClient *c);
1075 void sdiffCommand(redisClient *c);
1076 void sdiffstoreCommand(redisClient *c);
1077 void syncCommand(redisClient *c);
1078 void flushdbCommand(redisClient *c);
1079 void flushallCommand(redisClient *c);
1080 void sortCommand(redisClient *c);
1081 void lremCommand(redisClient *c);
1082 void rpoplpushCommand(redisClient *c);
1083 void infoCommand(redisClient *c);
1084 void mgetCommand(redisClient *c);
1085 void monitorCommand(redisClient *c);
1086 void expireCommand(redisClient *c);
1087 void expireatCommand(redisClient *c);
1088 void getsetCommand(redisClient *c);
1089 void ttlCommand(redisClient *c);
1090 void persistCommand(redisClient *c);
1091 void slaveofCommand(redisClient *c);
1092 void debugCommand(redisClient *c);
1093 void msetCommand(redisClient *c);
1094 void msetnxCommand(redisClient *c);
1095 void zaddCommand(redisClient *c);
1096 void zincrbyCommand(redisClient *c);
1097 void zrangeCommand(redisClient *c);
1098 void zrangebyscoreCommand(redisClient *c);
1099 void zrevrangebyscoreCommand(redisClient *c);
1100 void zcountCommand(redisClient *c);
1101 void zrevrangeCommand(redisClient *c);
1102 void zcardCommand(redisClient *c);
1103 void zremCommand(redisClient *c);
1104 void zscoreCommand(redisClient *c);
1105 void zremrangebyscoreCommand(redisClient *c);
1106 void multiCommand(redisClient *c);
1107 void execCommand(redisClient *c);
1108 void discardCommand(redisClient *c);
1109 void blpopCommand(redisClient *c);
1110 void brpopCommand(redisClient *c);
1111 void brpoplpushCommand(redisClient *c);
1112 void appendCommand(redisClient *c);
1113 void strlenCommand(redisClient *c);
1114 void zrankCommand(redisClient *c);
1115 void zrevrankCommand(redisClient *c);
1116 void hsetCommand(redisClient *c);
1117 void hsetnxCommand(redisClient *c);
1118 void hgetCommand(redisClient *c);
1119 void hmsetCommand(redisClient *c);
1120 void hmgetCommand(redisClient *c);
1121 void hdelCommand(redisClient *c);
1122 void hlenCommand(redisClient *c);
1123 void zremrangebyrankCommand(redisClient *c);
1124 void zunionstoreCommand(redisClient *c);
1125 void zinterstoreCommand(redisClient *c);
1126 void hkeysCommand(redisClient *c);
1127 void hvalsCommand(redisClient *c);
1128 void hgetallCommand(redisClient *c);
1129 void hexistsCommand(redisClient *c);
1130 void configCommand(redisClient *c);
1131 void hincrbyCommand(redisClient *c);
1132 void subscribeCommand(redisClient *c);
1133 void unsubscribeCommand(redisClient *c);
1134 void psubscribeCommand(redisClient *c);
1135 void punsubscribeCommand(redisClient *c);
1136 void publishCommand(redisClient *c);
1137 void watchCommand(redisClient *c);
1138 void unwatchCommand(redisClient *c);
1139 void clusterCommand(redisClient *c);
1140 void restoreCommand(redisClient *c);
1141 void migrateCommand(redisClient *c);
1142 void dumpCommand(redisClient *c);
1143 void objectCommand(redisClient *c);
1144 void clientCommand(redisClient *c);
1145 void evalCommand(redisClient *c);
1146 void evalShaCommand(redisClient *c);
1147
1148 #if defined(__GNUC__)
1149 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1150 void free(void *ptr) __attribute__ ((deprecated));
1151 void *malloc(size_t size) __attribute__ ((deprecated));
1152 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1153 #endif
1154
1155 #endif