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" /* Version macro */
  33 #include "util.h"    /* Misc functions useful in many places */
  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_DEFAULT_DBNUM     16
  45 #define REDIS_CONFIGLINE_MAX    1024
  46 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
  47 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  48 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  49 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
  50 #define REDIS_SHARED_INTEGERS 10000
  51 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
  52 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  53 #define REDIS_AUTO_AOFREWRITE_PERC  100
  54 #define REDIS_AUTO_AOFREWRITE_MIN_SIZE (1024*1024)
  55 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  56 #define REDIS_SLOWLOG_MAX_LEN 64
  57
  58 /* Hash table parameters */
  59 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  60
  61 /* Command flags:
  62  *   REDIS_CMD_DENYOOM:
  63  *     Commands marked with this flag will return an error when 'maxmemory' is
  64  *     set and the server is using more than 'maxmemory' bytes of memory.
  65  *     In short: commands with this flag are denied on low memory conditions.
  66  *   REDIS_CMD_FORCE_REPLICATION:
  67  *     Force replication even if dirty is 0. */
  68 #define REDIS_CMD_DENYOOM 4
  69 #define REDIS_CMD_FORCE_REPLICATION 8
  70
  71 /* Object types */
  72 #define REDIS_STRING 0
  73 #define REDIS_LIST 1
  74 #define REDIS_SET 2
  75 #define REDIS_ZSET 3
  76 #define REDIS_HASH 4
  77 #define REDIS_VMPOINTER 8
  78
  79 /* Object types only used for persistence in .rdb files */
  80 #define REDIS_HASH_ZIPMAP 9
  81 #define REDIS_LIST_ZIPLIST 10
  82 #define REDIS_SET_INTSET 11
  83 #define REDIS_ZSET_ZIPLIST 12
  84
  85 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  86  * internally represented in multiple ways. The 'encoding' field of the object
  87  * is set to one of this fields for this object. */
  88 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  89 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  90 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  91 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  92 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  93 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  94 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  95 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  96
  97 /* Object types only used for dumping to disk */
  98 #define REDIS_EXPIRETIME 253
  99 #define REDIS_SELECTDB 254
 100 #define REDIS_EOF 255
 101
 102 /* Defines related to the dump file format. To store 32 bits lengths for short
 103  * keys requires a lot of space, so we check the most significant 2 bits of
 104  * the first byte to interpreter the length:
 105  *
 106  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 107  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 108  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 109  * 11|000000 this means: specially encoded object will follow. The six bits
 110  *           number specify the kind of object that follows.
 111  *           See the REDIS_RDB_ENC_* defines.
 112  *
 113  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 114  * values, will fit inside. */
 115 #define REDIS_RDB_6BITLEN 0
 116 #define REDIS_RDB_14BITLEN 1
 117 #define REDIS_RDB_32BITLEN 2
 118 #define REDIS_RDB_ENCVAL 3
 119 #define REDIS_RDB_LENERR UINT_MAX
 120
 121 /* When a length of a string object stored on disk has the first two bits
 122  * set, the remaining two bits specify a special encoding for the object
 123  * accordingly to the following defines: */
 124 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 125 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 126 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 127 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 128
 129 /* Client flags */
 130 #define REDIS_SLAVE 1       /* This client is a slave server */
 131 #define REDIS_MASTER 2      /* This client is a master server */
 132 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 133 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 134 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 135 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 136 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 137 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 138                                server.unblocked_clients */
 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 /* We can print the stacktrace, so our assert is defined this way: */
 214 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 215 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 216 void _redisAssert(char *estr, char *file, int line);
 217 void _redisPanic(char *msg, char *file, int line);
 218
 219 /*-----------------------------------------------------------------------------
 220  * Data types
 221  *----------------------------------------------------------------------------*/
 222
 223 /* A redis object, that is a type able to hold a string / list / set */
 224
 225 /* The actual Redis Object */
 226 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 227 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 228 typedef struct redisObject {
 229     unsigned type:4;
 230     unsigned notused:2;     /* Not used */
 231     unsigned encoding:4;
 232     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 233     int refcount;
 234     void *ptr;
 235     /* VM fields are only allocated if VM is active, otherwise the
 236      * object allocation function will just allocate
 237      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 238      * Redis without VM active will not have any overhead. */
 239 } robj;
 240
 241 /* The VM pointer structure - identifies an object in the swap file.
 242  *
 243  * This object is stored in place of the value
 244  * object in the main key->value hash table representing a database.
 245  * Note that the first fields (type, storage) are the same as the redisObject
 246  * structure so that vmPointer strucuters can be accessed even when casted
 247  * as redisObject structures.
 248  *
 249  * This is useful as we don't know if a value object is or not on disk, but we
 250  * are always able to read obj->storage to check this. For vmPointer
 251  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 252  * is still possible to check the kind of object from the value of 'storage').*/
 253 typedef struct vmPointer {
 254     unsigned type:4;
 255     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 256     unsigned notused:26;
 257     unsigned int vtype; /* type of the object stored in the swap file */
 258     off_t page;         /* the page at witch the object is stored on disk */
 259     off_t usedpages;    /* number of pages used on disk */
 260 } vmpointer;
 261
 262 /* Macro used to initalize a Redis object allocated on the stack.
 263  * Note that this macro is taken near the structure definition to make sure
 264  * we'll update it when the structure is changed, to avoid bugs like
 265  * bug #85 introduced exactly in this way. */
 266 #define initStaticStringObject(_var,_ptr) do { \
 267     _var.refcount = 1; \
 268     _var.type = REDIS_STRING; \
 269     _var.encoding = REDIS_ENCODING_RAW; \
 270     _var.ptr = _ptr; \
 271 } while(0);
 272
 273 typedef struct redisDb {
 274     dict *dict;                 /* The keyspace for this DB */
 275     dict *expires;              /* Timeout of keys with a timeout set */
 276     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 277     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 278     int id;
 279 } redisDb;
 280
 281 /* Client MULTI/EXEC state */
 282 typedef struct multiCmd {
 283     robj **argv;
 284     int argc;
 285     struct redisCommand *cmd;
 286 } multiCmd;
 287
 288 typedef struct multiState {
 289     multiCmd *commands;     /* Array of MULTI commands */
 290     int count;              /* Total number of MULTI commands */
 291 } multiState;
 292
 293 typedef struct blockingState {
 294     robj **keys;            /* The key we are waiting to terminate a blocking
 295                              * operation such as BLPOP. Otherwise NULL. */
 296     int count;              /* Number of blocking keys */
 297     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 298                              * is >= timeout then the operation timed out. */
 299     robj *target;           /* The key that should receive the element,
 300                              * for BRPOPLPUSH. */
 301 } blockingState;
 302
 303 /* With multiplexing we need to take per-clinet state.
 304  * Clients are taken in a liked list. */
 305 typedef struct redisClient {
 306     int fd;
 307     redisDb *db;
 308     int dictid;
 309     sds querybuf;
 310     int argc;
 311     robj **argv;
 312     int reqtype;
 313     int multibulklen;       /* number of multi bulk arguments left to read */
 314     long bulklen;           /* length of bulk argument in multi bulk request */
 315     list *reply;
 316     int sentlen;
 317     time_t lastinteraction; /* time of the last interaction, used for timeout */
 318     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 319     int slaveseldb;         /* slave selected db, if this client is a slave */
 320     int authenticated;      /* when requirepass is non-NULL */
 321     int replstate;          /* replication state if this is a slave */
 322     int repldbfd;           /* replication DB file descriptor */
 323     long repldboff;         /* replication DB file offset */
 324     off_t repldbsize;       /* replication DB file size */
 325     multiState mstate;      /* MULTI/EXEC state */
 326     blockingState bpop;   /* blocking state */
 327     list *io_keys;          /* Keys this client is waiting to be loaded from the
 328                              * swap file in order to continue. */
 329     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 330     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 331     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 332
 333     /* Response buffer */
 334     int bufpos;
 335     char buf[REDIS_REPLY_CHUNK_BYTES];
 336 } redisClient;
 337
 338 struct saveparam {
 339     time_t seconds;
 340     int changes;
 341 };
 342
 343 struct sharedObjectsStruct {
 344     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 345     *colon, *nullbulk, *nullmultibulk, *queued,
 346     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 347     *outofrangeerr, *loadingerr, *plus,
 348     *select0, *select1, *select2, *select3, *select4,
 349     *select5, *select6, *select7, *select8, *select9,
 350     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 351     *mbulk4, *psubscribebulk, *punsubscribebulk,
 352     *integers[REDIS_SHARED_INTEGERS];
 353 };
 354
 355 /* ZSETs use a specialized version of Skiplists */
 356 typedef struct zskiplistNode {
 357     robj *obj;
 358     double score;
 359     struct zskiplistNode *backward;
 360     struct zskiplistLevel {
 361         struct zskiplistNode *forward;
 362         unsigned int span;
 363     } level[];
 364 } zskiplistNode;
 365
 366 typedef struct zskiplist {
 367     struct zskiplistNode *header, *tail;
 368     unsigned long length;
 369     int level;
 370 } zskiplist;
 371
 372 typedef struct zset {
 373     dict *dict;
 374     zskiplist *zsl;
 375 } zset;
 376
 377 /*-----------------------------------------------------------------------------
 378  * Redis cluster data structures
 379  *----------------------------------------------------------------------------*/
 380
 381 #define REDIS_CLUSTER_SLOTS 4096
 382 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 383 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 384 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 385 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 386 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 387
 388 struct clusterNode;
 389
 390 /* clusterLink encapsulates everything needed to talk with a remote node. */
 391 typedef struct clusterLink {
 392     int fd;                     /* TCP socket file descriptor */
 393     sds sndbuf;                 /* Packet send buffer */
 394     sds rcvbuf;                 /* Packet reception buffer */
 395     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 396 } clusterLink;
 397
 398 /* Node flags */
 399 #define REDIS_NODE_MASTER 1     /* The node is a master */
 400 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 401 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 402 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 403 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 404 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 405 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 406 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 407 #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"
 408
 409 struct clusterNode {
 410     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 411     int flags;      /* REDIS_NODE_... */
 412     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 413     int numslaves;  /* Number of slave nodes, if this is a master */
 414     struct clusterNode **slaves; /* pointers to slave nodes */
 415     struct clusterNode *slaveof; /* pointer to the master node */
 416     time_t ping_sent;       /* Unix time we sent latest ping */
 417     time_t pong_received;   /* Unix time we received the pong */
 418     char *configdigest;         /* Configuration digest of this node */
 419     time_t configdigest_ts;     /* Configuration digest timestamp */
 420     char ip[16];                /* Latest known IP address of this node */
 421     int port;                   /* Latest known port of this node */
 422     clusterLink *link;          /* TCP/IP link with this node */
 423 };
 424 typedef struct clusterNode clusterNode;
 425
 426 typedef struct {
 427     char *configfile;
 428     clusterNode *myself;  /* This node */
 429     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 430     int node_timeout;
 431     dict *nodes;          /* Hash table of name -> clusterNode structures */
 432     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 433     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 434     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 435     zskiplist *slots_to_keys;
 436 } clusterState;
 437
 438 /* Redis cluster messages header */
 439
 440 /* Note that the PING, PONG and MEET messages are actually the same exact
 441  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 442  * while MEET is a special PING that forces the receiver to add the sender
 443  * as a node (if it is not already in the list). */
 444 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 445 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 446 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 447 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 448
 449 /* Initially we don't know our "name", but we'll find it once we connect
 450  * to the first node, using the getsockname() function. Then we'll use this
 451  * address for all the next messages. */
 452 typedef struct {
 453     char nodename[REDIS_CLUSTER_NAMELEN];
 454     uint32_t ping_sent;
 455     uint32_t pong_received;
 456     char ip[16];    /* IP address last time it was seen */
 457     uint16_t port;  /* port last time it was seen */
 458     uint16_t flags;
 459     uint32_t notused; /* for 64 bit alignment */
 460 } clusterMsgDataGossip;
 461
 462 typedef struct {
 463     char nodename[REDIS_CLUSTER_NAMELEN];
 464 } clusterMsgDataFail;
 465
 466 union clusterMsgData {
 467     /* PING, MEET and PONG */
 468     struct {
 469         /* Array of N clusterMsgDataGossip structures */
 470         clusterMsgDataGossip gossip[1];
 471     } ping;
 472     /* FAIL */
 473     struct {
 474         clusterMsgDataFail about;
 475     } fail;
 476 };
 477
 478 typedef struct {
 479     uint32_t totlen;    /* Total length of this message */
 480     uint16_t type;      /* Message type */
 481     uint16_t count;     /* Only used for some kind of messages. */
 482     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 483     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 484     char slaveof[REDIS_CLUSTER_NAMELEN];
 485     char configdigest[32];
 486     uint16_t port;      /* Sender TCP base port */
 487     unsigned char state; /* Cluster state from the POV of the sender */
 488     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 489     union clusterMsgData data;
 490 } clusterMsg;
 491
 492 /*-----------------------------------------------------------------------------
 493  * Global server state
 494  *----------------------------------------------------------------------------*/
 495
 496 struct redisServer {
 497     /* General */
 498     redisDb *db;
 499     dict *commands;             /* Command table hahs table */
 500     aeEventLoop *el;
 501     /* Networking */
 502     int port;
 503     char *bindaddr;
 504     char *unixsocket;
 505     int ipfd;
 506     int sofd;
 507     int cfd;
 508     list *clients;
 509     list *slaves, *monitors;
 510     char neterr[ANET_ERR_LEN];
 511     /* RDB / AOF loading information */
 512     int loading;
 513     off_t loading_total_bytes;
 514     off_t loading_loaded_bytes;
 515     time_t loading_start_time;
 516     /* Fast pointers to often looked up command */
 517     struct redisCommand *delCommand, *multiCommand;
 518     int cronloops;              /* number of times the cron function run */
 519     time_t lastsave;                /* Unix time of last save succeeede */
 520     /* Fields used only for stats */
 521     time_t stat_starttime;          /* server start time */
 522     long long stat_numcommands;     /* number of processed commands */
 523     long long stat_numconnections;  /* number of connections received */
 524     long long stat_expiredkeys;     /* number of expired keys */
 525     long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */
 526     long long stat_keyspace_hits;   /* number of successful lookups of keys */
 527     long long stat_keyspace_misses; /* number of failed lookups of keys */
 528     size_t stat_peak_memory;        /* max used memory record */
 529     long long stat_fork_time;       /* time needed to perform latets fork() */
 530     list *slowlog;
 531     long long slowlog_entry_id;
 532     long long slowlog_log_slower_than;
 533     unsigned long slowlog_max_len;
 534     /* Configuration */
 535     int verbosity;
 536     int maxidletime;
 537     int dbnum;
 538     int daemonize;
 539     int appendonly;
 540     int appendfsync;
 541     int no_appendfsync_on_rewrite;
 542     int auto_aofrewrite_perc;       /* Rewrite AOF if % growth is > M and... */
 543     off_t auto_aofrewrite_min_size; /* the AOF file is at least N bytes. */
 544     off_t auto_aofrewrite_base_size;/* AOF size on latest startup or rewrite. */
 545     off_t appendonly_current_size;  /* AOF current size. */
 546     int aofrewrite_scheduled;       /* Rewrite once BGSAVE terminates. */
 547     int shutdown_asap;
 548     int activerehashing;
 549     char *requirepass;
 550     /* Persistence */
 551     long long dirty;            /* changes to DB from the last save */
 552     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 553     time_t lastfsync;
 554     int appendfd;
 555     int appendseldb;
 556     char *pidfile;
 557     pid_t bgsavechildpid;
 558     pid_t bgrewritechildpid;
 559     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 560     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 561     struct saveparam *saveparams;
 562     int saveparamslen;
 563     char *dbfilename;
 564     int rdbcompression;
 565     char *appendfilename;
 566     /* Logging */
 567     char *logfile;
 568     int syslog_enabled;
 569     char *syslog_ident;
 570     int syslog_facility;
 571     /* Replication related */
 572     int isslave;
 573     /* Slave specific fields */
 574     char *masterauth;
 575     char *masterhost;
 576     int masterport;
 577     redisClient *master;    /* client that is master for this slave */
 578     int repl_syncio_timeout; /* timeout for synchronous I/O calls */
 579     int replstate;          /* replication status if the instance is a slave */
 580     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 581     int repl_transfer_s;    /* slave -> master SYNC socket */
 582     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 583     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 584     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 585     int repl_serve_stale_data; /* Serve stale data when link is down? */
 586     time_t repl_down_since; /* unix time at which link with master went down */
 587     /* Limits */
 588     unsigned int maxclients;
 589     unsigned long long maxmemory;
 590     int maxmemory_policy;
 591     int maxmemory_samples;
 592     /* Blocked clients */
 593     unsigned int bpop_blocked_clients;
 594     list *unblocked_clients; /* list of clients to unblock before next loop */
 595     /* Sort parameters - qsort_r() is only available under BSD so we
 596      * have to take this state global, in order to pass it to sortCompare() */
 597     int sort_desc;
 598     int sort_alpha;
 599     int sort_bypattern;
 600     /* Zip structure config */
 601     size_t hash_max_zipmap_entries;
 602     size_t hash_max_zipmap_value;
 603     size_t list_max_ziplist_entries;
 604     size_t list_max_ziplist_value;
 605     size_t set_max_intset_entries;
 606     size_t zset_max_ziplist_entries;
 607     size_t zset_max_ziplist_value;
 608     time_t unixtime;    /* Unix time sampled every second. */
 609     /* Virtual memory I/O threads stuff */
 610     /* An I/O thread process an element taken from the io_jobs queue and
 611      * put the result of the operation in the io_done list. While the
 612      * job is being processed, it's put on io_processing queue. */
 613     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 614     list *io_processing; /* List of VM I/O jobs being processed */
 615     list *io_processed; /* List of VM I/O jobs already processed */
 616     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 617     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 618     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 619     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 620     int io_active_threads; /* Number of running I/O threads */
 621     int vm_max_threads; /* Max number of I/O threads running at the same time */
 622     /* Our main thread is blocked on the event loop, locking for sockets ready
 623      * to be read or written, so when a threaded I/O operation is ready to be
 624      * processed by the main thread, the I/O thread will use a unix pipe to
 625      * awake the main thread. The followings are the two pipe FDs. */
 626     int io_ready_pipe_read;
 627     int io_ready_pipe_write;
 628     /* Virtual memory stats */
 629     unsigned long long vm_stats_used_pages;
 630     unsigned long long vm_stats_swapped_objects;
 631     unsigned long long vm_stats_swapouts;
 632     unsigned long long vm_stats_swapins;
 633     /* Pubsub */
 634     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 635     list *pubsub_patterns; /* A list of pubsub_patterns */
 636     /* Misc */
 637     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 638     unsigned lruclock_padding:10;
 639     /* Cluster */
 640     int cluster_enabled;
 641     clusterState cluster;
 642 };
 643
 644 typedef struct pubsubPattern {
 645     redisClient *client;
 646     robj *pattern;
 647 } pubsubPattern;
 648
 649 typedef void redisCommandProc(redisClient *c);
 650 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 651 struct redisCommand {
 652     char *name;
 653     redisCommandProc *proc;
 654     int arity;
 655     int flags;
 656     /* Use a function to determine keys arguments in a command line.
 657      * Used for Redis Cluster redirect. */
 658     redisGetKeysProc *getkeys_proc;
 659     /* What keys should be loaded in background when calling this command? */
 660     int firstkey; /* The first argument that's a key (0 = no keys) */
 661     int lastkey;  /* THe last argument that's a key */
 662     int keystep;  /* The step between first and last key */
 663     long long microseconds, calls;
 664 };
 665
 666 struct redisFunctionSym {
 667     char *name;
 668     unsigned long pointer;
 669 };
 670
 671 typedef struct _redisSortObject {
 672     robj *obj;
 673     union {
 674         double score;
 675         robj *cmpobj;
 676     } u;
 677 } redisSortObject;
 678
 679 typedef struct _redisSortOperation {
 680     int type;
 681     robj *pattern;
 682 } redisSortOperation;
 683
 684 /* Structure to hold list iteration abstraction. */
 685 typedef struct {
 686     robj *subject;
 687     unsigned char encoding;
 688     unsigned char direction; /* Iteration direction */
 689     unsigned char *zi;
 690     listNode *ln;
 691 } listTypeIterator;
 692
 693 /* Structure for an entry while iterating over a list. */
 694 typedef struct {
 695     listTypeIterator *li;
 696     unsigned char *zi;  /* Entry in ziplist */
 697     listNode *ln;       /* Entry in linked list */
 698 } listTypeEntry;
 699
 700 /* Structure to hold set iteration abstraction. */
 701 typedef struct {
 702     robj *subject;
 703     int encoding;
 704     int ii; /* intset iterator */
 705     dictIterator *di;
 706 } setTypeIterator;
 707
 708 /* Structure to hold hash iteration abstration. Note that iteration over
 709  * hashes involves both fields and values. Because it is possible that
 710  * not both are required, store pointers in the iterator to avoid
 711  * unnecessary memory allocation for fields/values. */
 712 typedef struct {
 713     int encoding;
 714     unsigned char *zi;
 715     unsigned char *zk, *zv;
 716     unsigned int zklen, zvlen;
 717
 718     dictIterator *di;
 719     dictEntry *de;
 720 } hashTypeIterator;
 721
 722 #define REDIS_HASH_KEY 1
 723 #define REDIS_HASH_VALUE 2
 724
 725 /*-----------------------------------------------------------------------------
 726  * Extern declarations
 727  *----------------------------------------------------------------------------*/
 728
 729 extern struct redisServer server;
 730 extern struct sharedObjectsStruct shared;
 731 extern dictType setDictType;
 732 extern dictType zsetDictType;
 733 extern dictType clusterNodesDictType;
 734 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 735 dictType hashDictType;
 736
 737 /*-----------------------------------------------------------------------------
 738  * Functions prototypes
 739  *----------------------------------------------------------------------------*/
 740
 741 /* Utils */
 742 long long ustime(void);
 743
 744 /* networking.c -- Networking and Client related operations */
 745 redisClient *createClient(int fd);
 746 void closeTimedoutClients(void);
 747 void freeClient(redisClient *c);
 748 void resetClient(redisClient *c);
 749 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 750 void addReply(redisClient *c, robj *obj);
 751 void *addDeferredMultiBulkLength(redisClient *c);
 752 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 753 void addReplySds(redisClient *c, sds s);
 754 void processInputBuffer(redisClient *c);
 755 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 756 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 757 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 758 void addReplyBulk(redisClient *c, robj *obj);
 759 void addReplyBulkCString(redisClient *c, char *s);
 760 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 761 void addReplyBulkLongLong(redisClient *c, long long ll);
 762 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 763 void addReply(redisClient *c, robj *obj);
 764 void addReplySds(redisClient *c, sds s);
 765 void addReplyError(redisClient *c, char *err);
 766 void addReplyStatus(redisClient *c, char *status);
 767 void addReplyDouble(redisClient *c, double d);
 768 void addReplyLongLong(redisClient *c, long long ll);
 769 void addReplyMultiBulkLen(redisClient *c, long length);
 770 void *dupClientReplyValue(void *o);
 771 void getClientsMaxBuffers(unsigned long *longest_output_list,
 772                           unsigned long *biggest_input_buffer);
 773 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 774
 775 #ifdef __GNUC__
 776 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 777     __attribute__((format(printf, 2, 3)));
 778 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 779     __attribute__((format(printf, 2, 3)));
 780 #else
 781 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 782 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 783 #endif
 784
 785 /* List data type */
 786 void listTypeTryConversion(robj *subject, robj *value);
 787 void listTypePush(robj *subject, robj *value, int where);
 788 robj *listTypePop(robj *subject, int where);
 789 unsigned long listTypeLength(robj *subject);
 790 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 791 void listTypeReleaseIterator(listTypeIterator *li);
 792 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 793 robj *listTypeGet(listTypeEntry *entry);
 794 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 795 int listTypeEqual(listTypeEntry *entry, robj *o);
 796 void listTypeDelete(listTypeEntry *entry);
 797 void listTypeConvert(robj *subject, int enc);
 798 void unblockClientWaitingData(redisClient *c);
 799 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 800 void popGenericCommand(redisClient *c, int where);
 801
 802 /* MULTI/EXEC/WATCH... */
 803 void unwatchAllKeys(redisClient *c);
 804 void initClientMultiState(redisClient *c);
 805 void freeClientMultiState(redisClient *c);
 806 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
 807 void touchWatchedKey(redisDb *db, robj *key);
 808 void touchWatchedKeysOnFlush(int dbid);
 809
 810 /* Redis object implementation */
 811 void decrRefCount(void *o);
 812 void incrRefCount(robj *o);
 813 void freeStringObject(robj *o);
 814 void freeListObject(robj *o);
 815 void freeSetObject(robj *o);
 816 void freeZsetObject(robj *o);
 817 void freeHashObject(robj *o);
 818 robj *createObject(int type, void *ptr);
 819 robj *createStringObject(char *ptr, size_t len);
 820 robj *dupStringObject(robj *o);
 821 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 822 robj *tryObjectEncoding(robj *o);
 823 robj *getDecodedObject(robj *o);
 824 size_t stringObjectLen(robj *o);
 825 robj *createStringObjectFromLongLong(long long value);
 826 robj *createListObject(void);
 827 robj *createZiplistObject(void);
 828 robj *createSetObject(void);
 829 robj *createIntsetObject(void);
 830 robj *createHashObject(void);
 831 robj *createZsetObject(void);
 832 robj *createZsetZiplistObject(void);
 833 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 834 int checkType(redisClient *c, robj *o, int type);
 835 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 836 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 837 int getLongLongFromObject(robj *o, long long *target);
 838 char *strEncoding(int encoding);
 839 int compareStringObjects(robj *a, robj *b);
 840 int equalStringObjects(robj *a, robj *b);
 841 unsigned long estimateObjectIdleTime(robj *o);
 842
 843 /* Synchronous I/O with timeout */
 844 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 845 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 846 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 847 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 848 int fwriteBulkDouble(FILE *fp, double d);
 849 int fwriteBulkLongLong(FILE *fp, long long l);
 850 int fwriteBulkObject(FILE *fp, robj *obj);
 851 int fwriteBulkCount(FILE *fp, char prefix, int count);
 852
 853 /* Replication */
 854 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 855 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 856 void updateSlavesWaitingBgsave(int bgsaveerr);
 857 void replicationCron(void);
 858
 859 /* Generic persistence functions */
 860 void startLoading(FILE *fp);
 861 void loadingProgress(off_t pos);
 862 void stopLoading(void);
 863
 864 /* RDB persistence */
 865 int rdbLoad(char *filename);
 866 int rdbSaveBackground(char *filename);
 867 void rdbRemoveTempFile(pid_t childpid);
 868 int rdbSave(char *filename);
 869 int rdbSaveObject(FILE *fp, robj *o);
 870 off_t rdbSavedObjectLen(robj *o);
 871 off_t rdbSavedObjectPages(robj *o);
 872 robj *rdbLoadObject(int type, FILE *fp);
 873 void backgroundSaveDoneHandler(int exitcode, int bysignal);
 874 int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val, time_t expireitme, time_t now);
 875 int rdbLoadType(FILE *fp);
 876 time_t rdbLoadTime(FILE *fp);
 877 robj *rdbLoadStringObject(FILE *fp);
 878 int rdbSaveType(FILE *fp, unsigned char type);
 879 int rdbSaveLen(FILE *fp, uint32_t len);
 880
 881 /* AOF persistence */
 882 void flushAppendOnlyFile(void);
 883 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 884 void aofRemoveTempFile(pid_t childpid);
 885 int rewriteAppendOnlyFileBackground(void);
 886 int loadAppendOnlyFile(char *filename);
 887 void stopAppendOnly(void);
 888 int startAppendOnly(void);
 889 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 890
 891 /* Sorted sets data type */
 892
 893 /* Struct to hold a inclusive/exclusive range spec. */
 894 typedef struct {
 895     double min, max;
 896     int minex, maxex; /* are min or max exclusive? */
 897 } zrangespec;
 898
 899 zskiplist *zslCreate(void);
 900 void zslFree(zskiplist *zsl);
 901 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 902 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 903 int zslDelete(zskiplist *zsl, double score, robj *obj);
 904 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 905 double zzlGetScore(unsigned char *sptr);
 906 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 907 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 908 unsigned int zsetLength(robj *zobj);
 909 void zsetConvert(robj *zobj, int encoding);
 910
 911 /* Core functions */
 912 void freeMemoryIfNeeded(void);
 913 int processCommand(redisClient *c);
 914 void setupSignalHandlers(void);
 915 struct redisCommand *lookupCommand(sds name);
 916 struct redisCommand *lookupCommandByCString(char *s);
 917 void call(redisClient *c, struct redisCommand *cmd);
 918 int prepareForShutdown();
 919 void redisLog(int level, const char *fmt, ...);
 920 void usage();
 921 void updateDictResizePolicy(void);
 922 int htNeedsResize(dict *dict);
 923 void oom(const char *msg);
 924 void populateCommandTable(void);
 925 void resetCommandTableStats(void);
 926
 927 /* Set data type */
 928 robj *setTypeCreate(robj *value);
 929 int setTypeAdd(robj *subject, robj *value);
 930 int setTypeRemove(robj *subject, robj *value);
 931 int setTypeIsMember(robj *subject, robj *value);
 932 setTypeIterator *setTypeInitIterator(robj *subject);
 933 void setTypeReleaseIterator(setTypeIterator *si);
 934 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 935 robj *setTypeNextObject(setTypeIterator *si);
 936 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 937 unsigned long setTypeSize(robj *subject);
 938 void setTypeConvert(robj *subject, int enc);
 939
 940 /* Hash data type */
 941 void convertToRealHash(robj *o);
 942 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 943 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 944 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 945 robj *hashTypeGetObject(robj *o, robj *key);
 946 int hashTypeExists(robj *o, robj *key);
 947 int hashTypeSet(robj *o, robj *key, robj *value);
 948 int hashTypeDelete(robj *o, robj *key);
 949 unsigned long hashTypeLength(robj *o);
 950 hashTypeIterator *hashTypeInitIterator(robj *subject);
 951 void hashTypeReleaseIterator(hashTypeIterator *hi);
 952 int hashTypeNext(hashTypeIterator *hi);
 953 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 954 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 955 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 956
 957 /* Pub / Sub */
 958 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 959 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 960 void freePubsubPattern(void *p);
 961 int listMatchPubsubPattern(void *a, void *b);
 962
 963 /* Configuration */
 964 void loadServerConfig(char *filename);
 965 void appendServerSaveParams(time_t seconds, int changes);
 966 void resetServerSaveParams();
 967
 968 /* db.c -- Keyspace access API */
 969 int removeExpire(redisDb *db, robj *key);
 970 void propagateExpire(redisDb *db, robj *key);
 971 int expireIfNeeded(redisDb *db, robj *key);
 972 time_t getExpire(redisDb *db, robj *key);
 973 void setExpire(redisDb *db, robj *key, time_t when);
 974 robj *lookupKey(redisDb *db, robj *key);
 975 robj *lookupKeyRead(redisDb *db, robj *key);
 976 robj *lookupKeyWrite(redisDb *db, robj *key);
 977 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 978 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 979 void dbAdd(redisDb *db, robj *key, robj *val);
 980 void dbOverwrite(redisDb *db, robj *key, robj *val);
 981 void setKey(redisDb *db, robj *key, robj *val);
 982 int dbExists(redisDb *db, robj *key);
 983 robj *dbRandomKey(redisDb *db);
 984 int dbDelete(redisDb *db, robj *key);
 985 long long emptyDb();
 986 int selectDb(redisClient *c, int id);
 987 void signalModifiedKey(redisDb *db, robj *key);
 988 void signalFlushedDb(int dbid);
 989 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
 990
 991 /* API to get key arguments from commands */
 992 #define REDIS_GETKEYS_ALL 0
 993 #define REDIS_GETKEYS_PRELOAD 1
 994 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 995 void getKeysFreeResult(int *result);
 996 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 997 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 998 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 999
1000 /* Cluster */
1001 void clusterInit(void);
1002 unsigned short crc16(const char *buf, int len);
1003 unsigned int keyHashSlot(char *key, int keylen);
1004 clusterNode *createClusterNode(char *nodename, int flags);
1005 int clusterAddNode(clusterNode *node);
1006 void clusterCron(void);
1007 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1008
1009 /* Git SHA1 */
1010 char *redisGitSHA1(void);
1011 char *redisGitDirty(void);
1012
1013 /* Commands prototypes */
1014 void authCommand(redisClient *c);
1015 void pingCommand(redisClient *c);
1016 void echoCommand(redisClient *c);
1017 void setCommand(redisClient *c);
1018 void setnxCommand(redisClient *c);
1019 void setexCommand(redisClient *c);
1020 void getCommand(redisClient *c);
1021 void delCommand(redisClient *c);
1022 void existsCommand(redisClient *c);
1023 void setbitCommand(redisClient *c);
1024 void getbitCommand(redisClient *c);
1025 void setrangeCommand(redisClient *c);
1026 void getrangeCommand(redisClient *c);
1027 void incrCommand(redisClient *c);
1028 void decrCommand(redisClient *c);
1029 void incrbyCommand(redisClient *c);
1030 void decrbyCommand(redisClient *c);
1031 void selectCommand(redisClient *c);
1032 void randomkeyCommand(redisClient *c);
1033 void keysCommand(redisClient *c);
1034 void dbsizeCommand(redisClient *c);
1035 void lastsaveCommand(redisClient *c);
1036 void saveCommand(redisClient *c);
1037 void bgsaveCommand(redisClient *c);
1038 void bgrewriteaofCommand(redisClient *c);
1039 void shutdownCommand(redisClient *c);
1040 void moveCommand(redisClient *c);
1041 void renameCommand(redisClient *c);
1042 void renamenxCommand(redisClient *c);
1043 void lpushCommand(redisClient *c);
1044 void rpushCommand(redisClient *c);
1045 void lpushxCommand(redisClient *c);
1046 void rpushxCommand(redisClient *c);
1047 void linsertCommand(redisClient *c);
1048 void lpopCommand(redisClient *c);
1049 void rpopCommand(redisClient *c);
1050 void llenCommand(redisClient *c);
1051 void lindexCommand(redisClient *c);
1052 void lrangeCommand(redisClient *c);
1053 void ltrimCommand(redisClient *c);
1054 void typeCommand(redisClient *c);
1055 void lsetCommand(redisClient *c);
1056 void saddCommand(redisClient *c);
1057 void sremCommand(redisClient *c);
1058 void smoveCommand(redisClient *c);
1059 void sismemberCommand(redisClient *c);
1060 void scardCommand(redisClient *c);
1061 void spopCommand(redisClient *c);
1062 void srandmemberCommand(redisClient *c);
1063 void sinterCommand(redisClient *c);
1064 void sinterstoreCommand(redisClient *c);
1065 void sunionCommand(redisClient *c);
1066 void sunionstoreCommand(redisClient *c);
1067 void sdiffCommand(redisClient *c);
1068 void sdiffstoreCommand(redisClient *c);
1069 void syncCommand(redisClient *c);
1070 void flushdbCommand(redisClient *c);
1071 void flushallCommand(redisClient *c);
1072 void sortCommand(redisClient *c);
1073 void lremCommand(redisClient *c);
1074 void rpoplpushCommand(redisClient *c);
1075 void infoCommand(redisClient *c);
1076 void mgetCommand(redisClient *c);
1077 void monitorCommand(redisClient *c);
1078 void expireCommand(redisClient *c);
1079 void expireatCommand(redisClient *c);
1080 void getsetCommand(redisClient *c);
1081 void ttlCommand(redisClient *c);
1082 void persistCommand(redisClient *c);
1083 void slaveofCommand(redisClient *c);
1084 void debugCommand(redisClient *c);
1085 void msetCommand(redisClient *c);
1086 void msetnxCommand(redisClient *c);
1087 void zaddCommand(redisClient *c);
1088 void zincrbyCommand(redisClient *c);
1089 void zrangeCommand(redisClient *c);
1090 void zrangebyscoreCommand(redisClient *c);
1091 void zrevrangebyscoreCommand(redisClient *c);
1092 void zcountCommand(redisClient *c);
1093 void zrevrangeCommand(redisClient *c);
1094 void zcardCommand(redisClient *c);
1095 void zremCommand(redisClient *c);
1096 void zscoreCommand(redisClient *c);
1097 void zremrangebyscoreCommand(redisClient *c);
1098 void multiCommand(redisClient *c);
1099 void execCommand(redisClient *c);
1100 void discardCommand(redisClient *c);
1101 void blpopCommand(redisClient *c);
1102 void brpopCommand(redisClient *c);
1103 void brpoplpushCommand(redisClient *c);
1104 void appendCommand(redisClient *c);
1105 void strlenCommand(redisClient *c);
1106 void zrankCommand(redisClient *c);
1107 void zrevrankCommand(redisClient *c);
1108 void hsetCommand(redisClient *c);
1109 void hsetnxCommand(redisClient *c);
1110 void hgetCommand(redisClient *c);
1111 void hmsetCommand(redisClient *c);
1112 void hmgetCommand(redisClient *c);
1113 void hdelCommand(redisClient *c);
1114 void hlenCommand(redisClient *c);
1115 void zremrangebyrankCommand(redisClient *c);
1116 void zunionstoreCommand(redisClient *c);
1117 void zinterstoreCommand(redisClient *c);
1118 void hkeysCommand(redisClient *c);
1119 void hvalsCommand(redisClient *c);
1120 void hgetallCommand(redisClient *c);
1121 void hexistsCommand(redisClient *c);
1122 void configCommand(redisClient *c);
1123 void hincrbyCommand(redisClient *c);
1124 void subscribeCommand(redisClient *c);
1125 void unsubscribeCommand(redisClient *c);
1126 void psubscribeCommand(redisClient *c);
1127 void punsubscribeCommand(redisClient *c);
1128 void publishCommand(redisClient *c);
1129 void watchCommand(redisClient *c);
1130 void unwatchCommand(redisClient *c);
1131 void clusterCommand(redisClient *c);
1132 void restoreCommand(redisClient *c);
1133 void migrateCommand(redisClient *c);
1134 void dumpCommand(redisClient *c);
1135 void objectCommand(redisClient *c);
1136 void clientCommand(redisClient *c);
1137
1138 #if defined(__GNUC__)
1139 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1140 void free(void *ptr) __attribute__ ((deprecated));
1141 void *malloc(size_t size) __attribute__ ((deprecated));
1142 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1143 #endif
1144
1145 #endif