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 "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       0       /* default client timeout: infinite */
  42 #define REDIS_MAX_QUERYBUF_LEN  (1024*1024*1024) /* 1GB max query buffer. */
  43 #define REDIS_IOBUF_LEN         (1024*16)
  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 (16*1024) /* 16k output buffer */
  53 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  54 #define REDIS_AOF_REWRITE_PERC  100
  55 #define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
  56 #define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
  57 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  58 #define REDIS_SLOWLOG_MAX_LEN 64
  59 #define REDIS_MAX_CLIENTS 10000
  60
  61 #define REDIS_REPL_TIMEOUT 60
  62 #define REDIS_REPL_PING_SLAVE_PERIOD 10
  63 #define REDIS_MBULK_BIG_ARG (1024*32)
  64
  65 /* Hash table parameters */
  66 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  67
  68 /* Command flags. Please check the command table defined in the redis.c file
  69  * for more information about the meaning of every flag. */
  70 #define REDIS_CMD_WRITE 1                   /* "w" flag */
  71 #define REDIS_CMD_READONLY 2                /* "r" flag */
  72 #define REDIS_CMD_DENYOOM 4                 /* "m" flag */
  73 #define REDIS_CMD_FORCE_REPLICATION 8       /* "f" flag */
  74 #define REDIS_CMD_ADMIN 16                  /* "a" flag */
  75 #define REDIS_CMD_PUBSUB 32                 /* "p" flag */
  76 #define REDIS_CMD_NOSCRIPT  64              /* "s" flag */
  77 #define REDIS_CMD_RANDOM 128                /* "R" flag */
  78
  79 /* Object types */
  80 #define REDIS_STRING 0
  81 #define REDIS_LIST 1
  82 #define REDIS_SET 2
  83 #define REDIS_ZSET 3
  84 #define REDIS_HASH 4
  85 #define REDIS_VMPOINTER 8
  86
  87 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  88  * internally represented in multiple ways. The 'encoding' field of the object
  89  * is set to one of this fields for this object. */
  90 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  91 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  92 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  93 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  94 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  95 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  96 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  97 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  98
  99 /* Defines related to the dump file format. To store 32 bits lengths for short
 100  * keys requires a lot of space, so we check the most significant 2 bits of
 101  * the first byte to interpreter the length:
 102  *
 103  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 104  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 105  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 106  * 11|000000 this means: specially encoded object will follow. The six bits
 107  *           number specify the kind of object that follows.
 108  *           See the REDIS_RDB_ENC_* defines.
 109  *
 110  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 111  * values, will fit inside. */
 112 #define REDIS_RDB_6BITLEN 0
 113 #define REDIS_RDB_14BITLEN 1
 114 #define REDIS_RDB_32BITLEN 2
 115 #define REDIS_RDB_ENCVAL 3
 116 #define REDIS_RDB_LENERR UINT_MAX
 117
 118 /* When a length of a string object stored on disk has the first two bits
 119  * set, the remaining two bits specify a special encoding for the object
 120  * accordingly to the following defines: */
 121 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 122 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 123 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 124 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 125
 126 /* AOF states */
 127 #define REDIS_AOF_OFF 0             /* AOF is off */
 128 #define REDIS_AOF_ON 1              /* AOF is on */
 129 #define REDIS_AOF_WAIT_REWRITE 2    /* AOF waits rewrite to start appending */
 130
 131 /* Client flags */
 132 #define REDIS_SLAVE 1       /* This client is a slave server */
 133 #define REDIS_MASTER 2      /* This client is a master server */
 134 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 135 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 136 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 137 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 138 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 139 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 140                                server.unblocked_clients */
 141 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 142 #define REDIS_ASKING 1024   /* Client issued the ASKING command */
 143
 144 /* Client request types */
 145 #define REDIS_REQ_INLINE 1
 146 #define REDIS_REQ_MULTIBULK 2
 147
 148 /* Slave replication state - slave side */
 149 #define REDIS_REPL_NONE 0 /* No active replication */
 150 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
 151 #define REDIS_REPL_CONNECTING 2 /* Connecting to master */
 152 #define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
 153 #define REDIS_REPL_CONNECTED 4 /* Connected to master */
 154
 155 /* Synchronous read timeout - slave side */
 156 #define REDIS_REPL_SYNCIO_TIMEOUT 5
 157
 158 /* Slave replication state - from the point of view of master
 159  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 160  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 161  * to start the next background saving in order to send updates to it. */
 162 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 163 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 164 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 165 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 166
 167 /* List related stuff */
 168 #define REDIS_HEAD 0
 169 #define REDIS_TAIL 1
 170
 171 /* Sort operations */
 172 #define REDIS_SORT_GET 0
 173 #define REDIS_SORT_ASC 1
 174 #define REDIS_SORT_DESC 2
 175 #define REDIS_SORTKEY_MAX 1024
 176
 177 /* Log levels */
 178 #define REDIS_DEBUG 0
 179 #define REDIS_VERBOSE 1
 180 #define REDIS_NOTICE 2
 181 #define REDIS_WARNING 3
 182 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 183
 184 /* Anti-warning macro... */
 185 #define REDIS_NOTUSED(V) ((void) V)
 186
 187 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 188 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 189
 190 /* Append only defines */
 191 #define AOF_FSYNC_NO 0
 192 #define AOF_FSYNC_ALWAYS 1
 193 #define AOF_FSYNC_EVERYSEC 2
 194
 195 /* Zip structure related defaults */
 196 #define REDIS_HASH_MAX_ZIPLIST_ENTRIES 512
 197 #define REDIS_HASH_MAX_ZIPLIST_VALUE 64
 198 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 199 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 200 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 201 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 202 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 203
 204 /* Sets operations codes */
 205 #define REDIS_OP_UNION 0
 206 #define REDIS_OP_DIFF 1
 207 #define REDIS_OP_INTER 2
 208
 209 /* Redis maxmemory strategies */
 210 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 211 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 212 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 213 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 214 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 215 #define REDIS_MAXMEMORY_NO_EVICTION 5
 216
 217 /* Scripting */
 218 #define REDIS_LUA_TIME_LIMIT 5000 /* milliseconds */
 219
 220 /* Units */
 221 #define UNIT_SECONDS 0
 222 #define UNIT_MILLISECONDS 1
 223
 224 /* SHUTDOWN flags */
 225 #define REDIS_SHUTDOWN_SAVE 1       /* Force SAVE on SHUTDOWN even if no save
 226                                        points are configured. */
 227 #define REDIS_SHUTDOWN_NOSAVE 2     /* Don't SAVE on SHUTDOWN. */
 228
 229 /* We can print the stacktrace, so our assert is defined this way: */
 230 #define redisAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_redisAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),_exit(1)))
 231 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 232 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 233
 234 /*-----------------------------------------------------------------------------
 235  * Data types
 236  *----------------------------------------------------------------------------*/
 237
 238 /* A redis object, that is a type able to hold a string / list / set */
 239
 240 /* The actual Redis Object */
 241 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 242 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 243 typedef struct redisObject {
 244     unsigned type:4;
 245     unsigned notused:2;     /* Not used */
 246     unsigned encoding:4;
 247     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 248     int refcount;
 249     void *ptr;
 250 } robj;
 251
 252 /* Macro used to initalize a Redis object allocated on the stack.
 253  * Note that this macro is taken near the structure definition to make sure
 254  * we'll update it when the structure is changed, to avoid bugs like
 255  * bug #85 introduced exactly in this way. */
 256 #define initStaticStringObject(_var,_ptr) do { \
 257     _var.refcount = 1; \
 258     _var.type = REDIS_STRING; \
 259     _var.encoding = REDIS_ENCODING_RAW; \
 260     _var.ptr = _ptr; \
 261 } while(0);
 262
 263 typedef struct redisDb {
 264     dict *dict;                 /* The keyspace for this DB */
 265     dict *expires;              /* Timeout of keys with a timeout set */
 266     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 267     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 268     int id;
 269 } redisDb;
 270
 271 /* Client MULTI/EXEC state */
 272 typedef struct multiCmd {
 273     robj **argv;
 274     int argc;
 275     struct redisCommand *cmd;
 276 } multiCmd;
 277
 278 typedef struct multiState {
 279     multiCmd *commands;     /* Array of MULTI commands */
 280     int count;              /* Total number of MULTI commands */
 281 } multiState;
 282
 283 typedef struct blockingState {
 284     robj **keys;            /* The key we are waiting to terminate a blocking
 285                              * operation such as BLPOP. Otherwise NULL. */
 286     int count;              /* Number of blocking keys */
 287     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 288                              * is >= timeout then the operation timed out. */
 289     robj *target;           /* The key that should receive the element,
 290                              * for BRPOPLPUSH. */
 291 } blockingState;
 292
 293 /* With multiplexing we need to take per-clinet state.
 294  * Clients are taken in a liked list. */
 295 typedef struct redisClient {
 296     int fd;
 297     redisDb *db;
 298     int dictid;
 299     sds querybuf;
 300     int argc;
 301     robj **argv;
 302     struct redisCommand *cmd, *lastcmd;
 303     int reqtype;
 304     int multibulklen;       /* number of multi bulk arguments left to read */
 305     long bulklen;           /* length of bulk argument in multi bulk request */
 306     list *reply;
 307     int sentlen;
 308     time_t lastinteraction; /* time of the last interaction, used for timeout */
 309     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 310     int slaveseldb;         /* slave selected db, if this client is a slave */
 311     int authenticated;      /* when requirepass is non-NULL */
 312     int replstate;          /* replication state if this is a slave */
 313     int repldbfd;           /* replication DB file descriptor */
 314     long repldboff;         /* replication DB file offset */
 315     off_t repldbsize;       /* replication DB file size */
 316     multiState mstate;      /* MULTI/EXEC state */
 317     blockingState bpop;   /* blocking state */
 318     list *io_keys;          /* Keys this client is waiting to be loaded from the
 319                              * swap file in order to continue. */
 320     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 321     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 322     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 323
 324     /* Response buffer */
 325     int bufpos;
 326     char buf[REDIS_REPLY_CHUNK_BYTES];
 327 } redisClient;
 328
 329 struct saveparam {
 330     time_t seconds;
 331     int changes;
 332 };
 333
 334 struct sharedObjectsStruct {
 335     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 336     *colon, *nullbulk, *nullmultibulk, *queued,
 337     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 338     *outofrangeerr, *noscripterr, *loadingerr, *slowscripterr, *plus,
 339     *select0, *select1, *select2, *select3, *select4,
 340     *select5, *select6, *select7, *select8, *select9,
 341     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 342     *mbulk4, *psubscribebulk, *punsubscribebulk,
 343     *integers[REDIS_SHARED_INTEGERS];
 344 };
 345
 346 /* ZSETs use a specialized version of Skiplists */
 347 typedef struct zskiplistNode {
 348     robj *obj;
 349     double score;
 350     struct zskiplistNode *backward;
 351     struct zskiplistLevel {
 352         struct zskiplistNode *forward;
 353         unsigned int span;
 354     } level[];
 355 } zskiplistNode;
 356
 357 typedef struct zskiplist {
 358     struct zskiplistNode *header, *tail;
 359     unsigned long length;
 360     int level;
 361 } zskiplist;
 362
 363 typedef struct zset {
 364     dict *dict;
 365     zskiplist *zsl;
 366 } zset;
 367
 368 /*-----------------------------------------------------------------------------
 369  * Redis cluster data structures
 370  *----------------------------------------------------------------------------*/
 371
 372 #define REDIS_CLUSTER_SLOTS 4096
 373 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 374 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 375 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 376 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 377 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 378
 379 struct clusterNode;
 380
 381 /* clusterLink encapsulates everything needed to talk with a remote node. */
 382 typedef struct clusterLink {
 383     int fd;                     /* TCP socket file descriptor */
 384     sds sndbuf;                 /* Packet send buffer */
 385     sds rcvbuf;                 /* Packet reception buffer */
 386     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 387 } clusterLink;
 388
 389 /* Node flags */
 390 #define REDIS_NODE_MASTER 1     /* The node is a master */
 391 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 392 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 393 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 394 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 395 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 396 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 397 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 398 #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"
 399
 400 struct clusterNode {
 401     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 402     int flags;      /* REDIS_NODE_... */
 403     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 404     int numslaves;  /* Number of slave nodes, if this is a master */
 405     struct clusterNode **slaves; /* pointers to slave nodes */
 406     struct clusterNode *slaveof; /* pointer to the master node */
 407     time_t ping_sent;       /* Unix time we sent latest ping */
 408     time_t pong_received;   /* Unix time we received the pong */
 409     char *configdigest;         /* Configuration digest of this node */
 410     time_t configdigest_ts;     /* Configuration digest timestamp */
 411     char ip[16];                /* Latest known IP address of this node */
 412     int port;                   /* Latest known port of this node */
 413     clusterLink *link;          /* TCP/IP link with this node */
 414 };
 415 typedef struct clusterNode clusterNode;
 416
 417 typedef struct {
 418     char *configfile;
 419     clusterNode *myself;  /* This node */
 420     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 421     int node_timeout;
 422     dict *nodes;          /* Hash table of name -> clusterNode structures */
 423     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 424     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 425     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 426     zskiplist *slots_to_keys;
 427 } clusterState;
 428
 429 /* Redis cluster messages header */
 430
 431 /* Note that the PING, PONG and MEET messages are actually the same exact
 432  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 433  * while MEET is a special PING that forces the receiver to add the sender
 434  * as a node (if it is not already in the list). */
 435 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 436 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 437 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 438 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 439 #define CLUSTERMSG_TYPE_PUBLISH 4       /* Pub/Sub Publish propatagion */
 440
 441 /* Initially we don't know our "name", but we'll find it once we connect
 442  * to the first node, using the getsockname() function. Then we'll use this
 443  * address for all the next messages. */
 444 typedef struct {
 445     char nodename[REDIS_CLUSTER_NAMELEN];
 446     uint32_t ping_sent;
 447     uint32_t pong_received;
 448     char ip[16];    /* IP address last time it was seen */
 449     uint16_t port;  /* port last time it was seen */
 450     uint16_t flags;
 451     uint32_t notused; /* for 64 bit alignment */
 452 } clusterMsgDataGossip;
 453
 454 typedef struct {
 455     char nodename[REDIS_CLUSTER_NAMELEN];
 456 } clusterMsgDataFail;
 457
 458 typedef struct {
 459     uint32_t channel_len;
 460     uint32_t message_len;
 461     unsigned char bulk_data[8]; /* defined as 8 just for alignment concerns. */
 462 } clusterMsgDataPublish;
 463
 464 union clusterMsgData {
 465     /* PING, MEET and PONG */
 466     struct {
 467         /* Array of N clusterMsgDataGossip structures */
 468         clusterMsgDataGossip gossip[1];
 469     } ping;
 470
 471     /* FAIL */
 472     struct {
 473         clusterMsgDataFail about;
 474     } fail;
 475
 476     /* PUBLISH */
 477     struct {
 478         clusterMsgDataPublish msg;
 479     } publish;
 480 };
 481
 482 typedef struct {
 483     uint32_t totlen;    /* Total length of this message */
 484     uint16_t type;      /* Message type */
 485     uint16_t count;     /* Only used for some kind of messages. */
 486     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 487     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 488     char slaveof[REDIS_CLUSTER_NAMELEN];
 489     char configdigest[32];
 490     uint16_t port;      /* Sender TCP base port */
 491     unsigned char state; /* Cluster state from the POV of the sender */
 492     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 493     union clusterMsgData data;
 494 } clusterMsg;
 495
 496 /*-----------------------------------------------------------------------------
 497  * Global server state
 498  *----------------------------------------------------------------------------*/
 499
 500 struct redisServer {
 501     /* General */
 502     redisDb *db;
 503     dict *commands;             /* Command table hahs table */
 504     aeEventLoop *el;
 505     unsigned lruclock:22;       /* Clock incrementing every minute, for LRU */
 506     unsigned lruclock_padding:10;
 507     int shutdown_asap;          /* SHUTDOWN needed ASAP */
 508     int activerehashing;        /* Incremental rehash in serverCron() */
 509     char *requirepass;          /* Pass for AUTH command, or NULL */
 510     char *pidfile;              /* PID file path */
 511     /* Networking */
 512     int port;                   /* TCP listening port */
 513     char *bindaddr;             /* Bind address or NULL */
 514     char *unixsocket;           /* UNIX socket path */
 515     mode_t unixsocketperm;      /* UNIX socket permission */
 516     int ipfd;                   /* TCP socket file descriptor */
 517     int sofd;                   /* Unix socket file descriptor */
 518     int cfd;                    /* Cluster bus lisetning socket */
 519     list *clients;              /* List of active clients */
 520     list *slaves, *monitors;    /* List of slaves and MONITORs */
 521     char neterr[ANET_ERR_LEN];  /* Error buffer for anet.c */
 522     /* RDB / AOF loading information */
 523     int loading;                /* We are loading data from disk if true */
 524     off_t loading_total_bytes;
 525     off_t loading_loaded_bytes;
 526     time_t loading_start_time;
 527     /* Fast pointers to often looked up command */
 528     struct redisCommand *delCommand, *multiCommand;
 529     int cronloops;                  /* Number of times the cron function run */
 530     time_t lastsave;                /* Unix time of last save succeeede */
 531     /* Fields used only for stats */
 532     time_t stat_starttime;          /* Server start time */
 533     long long stat_numcommands;     /* Number of processed commands */
 534     long long stat_numconnections;  /* Number of connections received */
 535     long long stat_expiredkeys;     /* Number of expired keys */
 536     long long stat_evictedkeys;     /* Number of evicted keys (maxmemory) */
 537     long long stat_keyspace_hits;   /* Number of successful lookups of keys */
 538     long long stat_keyspace_misses; /* Number of failed lookups of keys */
 539     size_t stat_peak_memory;        /* Max used memory record */
 540     long long stat_fork_time;       /* Time needed to perform latets fork() */
 541     long long stat_rejected_conn;   /* Clients rejected because of maxclients */
 542     list *slowlog;                  /* SLOWLOG list of commands */
 543     long long slowlog_entry_id;     /* SLOWLOG current entry ID */
 544     long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
 545     unsigned long slowlog_max_len;     /* SLOWLOG max number of items logged */
 546     /* Configuration */
 547     int verbosity;                  /* Loglevel in redis.conf */
 548     int maxidletime;                /* Client timeout in seconds */
 549     size_t client_max_querybuf_len; /* Limit for client query buffer length */
 550     int dbnum;                      /* Total number of configured DBs */
 551     int daemonize;                  /* True if running as a daemon */
 552     /* AOF persistence */
 553     int aof_state;                  /* REDIS_AOF_(ON|OFF|WAIT_REWRITE) */
 554     int aof_fsync;                  /* Kind of fsync() policy */
 555     char *aof_filename;             /* Name of the AOF file */
 556     int aof_no_fsync_on_rewrite;    /* Don't fsync if a rewrite is in prog. */
 557     int aof_rewrite_perc;           /* Rewrite AOF if % growth is > M and... */
 558     off_t aof_rewrite_min_size;     /* the AOF file is at least N bytes. */
 559     off_t aof_rewrite_base_size;    /* AOF size on latest startup or rewrite. */
 560     off_t aof_current_size;         /* AOF current size. */
 561     int aof_rewrite_scheduled;      /* Rewrite once BGSAVE terminates. */
 562     pid_t aof_child_pid;            /* PID if rewriting process */
 563     sds aof_rewrite_buf; /* buffer taken by parent during oppend only rewrite */
 564     sds aof_buf;      /* AOF buffer, written before entering the event loop */
 565     int aof_fd;       /* File descriptor of currently selected AOF file */
 566     int aof_selected_db; /* Currently selected DB in AOF */
 567     time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
 568     time_t aof_last_fsync;            /* UNIX time of last fsync() */
 569     /* RDB persistence */
 570     long long dirty;                /* Changes to DB from the last save */
 571     long long dirty_before_bgsave;  /* Used to restore dirty on failed BGSAVE */
 572     pid_t rdb_child_pid;            /* PID of RDB saving child */
 573     struct saveparam *saveparams;   /* Save points array for RDB */
 574     int saveparamslen;              /* Number of saving points */
 575     char *rdb_filename;             /* Name of RDB file */
 576     int rdb_compression;            /* Use compression in RDB? */
 577     /* Logging */
 578     char *logfile;                  /* Path of log file */
 579     int syslog_enabled;             /* Is syslog enabled? */
 580     char *syslog_ident;             /* Syslog ident */
 581     int syslog_facility;            /* Syslog facility */
 582     /* Slave specific fields */
 583     char *masterauth;               /* AUTH with this password with master */
 584     char *masterhost;               /* Hostname of master */
 585     int masterport;                 /* Port of master */
 586     int repl_ping_slave_period;     /* Master pings the salve every N seconds */
 587     int repl_timeout;               /* Timeout after N seconds of master idle */
 588     redisClient *master;     /* Client that is master for this slave */
 589     int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
 590     int repl_state;          /* Replication status if the instance is a slave */
 591     off_t repl_transfer_left;  /* Bytes left reading .rdb  */
 592     int repl_transfer_s;     /* Slave -> Master SYNC socket */
 593     int repl_transfer_fd;    /* Slave -> Master SYNC temp file descriptor */
 594     char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
 595     time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
 596     int repl_serve_stale_data; /* Serve stale data when link is down? */
 597     time_t repl_down_since; /* Unix time at which link with master went down */
 598     /* Limits */
 599     unsigned int maxclients;        /* Max number of simultaneous clients */
 600     unsigned long long maxmemory;   /* Max number of memory bytes to use */
 601     int maxmemory_policy;           /* Policy for key evition */
 602     int maxmemory_samples;          /* Pricision of random sampling */
 603     /* Blocked clients */
 604     unsigned int bpop_blocked_clients; /* Number of clients blocked by lists */
 605     list *unblocked_clients; /* list of clients to unblock before next loop */
 606     /* Sort parameters - qsort_r() is only available under BSD so we
 607      * have to take this state global, in order to pass it to sortCompare() */
 608     int sort_desc;
 609     int sort_alpha;
 610     int sort_bypattern;
 611     /* Zip structure config, see redis.conf for more information  */
 612     size_t hash_max_ziplist_entries;
 613     size_t hash_max_ziplist_value;
 614     size_t list_max_ziplist_entries;
 615     size_t list_max_ziplist_value;
 616     size_t set_max_intset_entries;
 617     size_t zset_max_ziplist_entries;
 618     size_t zset_max_ziplist_value;
 619     time_t unixtime;        /* Unix time sampled every second. */
 620     /* Pubsub */
 621     dict *pubsub_channels;  /* Map channels to list of subscribed clients */
 622     list *pubsub_patterns;  /* A list of pubsub_patterns */
 623     /* Cluster */
 624     int cluster_enabled;    /* Is cluster enabled? */
 625     clusterState cluster;   /* State of the cluster */
 626     /* Scripting */
 627     lua_State *lua; /* The Lua interpreter. We use just one for all clients */
 628     redisClient *lua_client;   /* The "fake client" to query Redis from Lua */
 629     redisClient *lua_caller;   /* The client running EVAL right now, or NULL */
 630     dict *lua_scripts;         /* A dictionary of SHA1 -> Lua scripts */
 631     long long lua_time_limit;  /* Script timeout in seconds */
 632     long long lua_time_start;  /* Start time of script */
 633     int lua_write_dirty;  /* True if a write command was called during the
 634                              execution of the current script. */
 635     int lua_random_dirty; /* True if a random command was called during the
 636                              execution of the current script. */
 637     int lua_timedout;     /* True if we reached the time limit for script
 638                              execution. */
 639     int lua_kill;         /* Kill the script if true. */
 640     /* Assert & bug reportign */
 641     char *assert_failed;
 642     char *assert_file;
 643     int assert_line;
 644     int bug_report_start; /* True if bug report header was already logged. */
 645 };
 646
 647 typedef struct pubsubPattern {
 648     redisClient *client;
 649     robj *pattern;
 650 } pubsubPattern;
 651
 652 typedef void redisCommandProc(redisClient *c);
 653 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 654 struct redisCommand {
 655     char *name;
 656     redisCommandProc *proc;
 657     int arity;
 658     char *sflags; /* Flags as string represenation, one char per flag. */
 659     int flags;    /* The actual flags, obtained from the 'sflags' field. */
 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     robj *subject;
 718     int encoding;
 719
 720     unsigned char *fptr, *vptr;
 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 dictType dbDictType;
 739 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 740 dictType hashDictType;
 741
 742 /*-----------------------------------------------------------------------------
 743  * Functions prototypes
 744  *----------------------------------------------------------------------------*/
 745
 746 /* Utils */
 747 long long ustime(void);
 748 long long mstime(void);
 749
 750 /* networking.c -- Networking and Client related operations */
 751 redisClient *createClient(int fd);
 752 void closeTimedoutClients(void);
 753 void freeClient(redisClient *c);
 754 void resetClient(redisClient *c);
 755 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 756 void addReply(redisClient *c, robj *obj);
 757 void *addDeferredMultiBulkLength(redisClient *c);
 758 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 759 void addReplySds(redisClient *c, sds s);
 760 void processInputBuffer(redisClient *c);
 761 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 762 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 763 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 764 void addReplyBulk(redisClient *c, robj *obj);
 765 void addReplyBulkCString(redisClient *c, char *s);
 766 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 767 void addReplyBulkLongLong(redisClient *c, long long ll);
 768 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 769 void addReply(redisClient *c, robj *obj);
 770 void addReplySds(redisClient *c, sds s);
 771 void addReplyError(redisClient *c, char *err);
 772 void addReplyStatus(redisClient *c, char *status);
 773 void addReplyDouble(redisClient *c, double d);
 774 void addReplyLongLong(redisClient *c, long long ll);
 775 void addReplyMultiBulkLen(redisClient *c, long length);
 776 void *dupClientReplyValue(void *o);
 777 void getClientsMaxBuffers(unsigned long *longest_output_list,
 778                           unsigned long *biggest_input_buffer);
 779 sds getClientInfoString(redisClient *client);
 780 sds getAllClientsInfoString(void);
 781 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 782 void rewriteClientCommandArgument(redisClient *c, int i, robj *newval);
 783
 784 #ifdef __GNUC__
 785 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 786     __attribute__((format(printf, 2, 3)));
 787 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 788     __attribute__((format(printf, 2, 3)));
 789 #else
 790 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 791 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 792 #endif
 793
 794 /* List data type */
 795 void listTypeTryConversion(robj *subject, robj *value);
 796 void listTypePush(robj *subject, robj *value, int where);
 797 robj *listTypePop(robj *subject, int where);
 798 unsigned long listTypeLength(robj *subject);
 799 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 800 void listTypeReleaseIterator(listTypeIterator *li);
 801 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 802 robj *listTypeGet(listTypeEntry *entry);
 803 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 804 int listTypeEqual(listTypeEntry *entry, robj *o);
 805 void listTypeDelete(listTypeEntry *entry);
 806 void listTypeConvert(robj *subject, int enc);
 807 void unblockClientWaitingData(redisClient *c);
 808 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 809 void popGenericCommand(redisClient *c, int where);
 810
 811 /* MULTI/EXEC/WATCH... */
 812 void unwatchAllKeys(redisClient *c);
 813 void initClientMultiState(redisClient *c);
 814 void freeClientMultiState(redisClient *c);
 815 void queueMultiCommand(redisClient *c);
 816 void touchWatchedKey(redisDb *db, robj *key);
 817 void touchWatchedKeysOnFlush(int dbid);
 818
 819 /* Redis object implementation */
 820 void decrRefCount(void *o);
 821 void incrRefCount(robj *o);
 822 robj *resetRefCount(robj *obj);
 823 void freeStringObject(robj *o);
 824 void freeListObject(robj *o);
 825 void freeSetObject(robj *o);
 826 void freeZsetObject(robj *o);
 827 void freeHashObject(robj *o);
 828 robj *createObject(int type, void *ptr);
 829 robj *createStringObject(char *ptr, size_t len);
 830 robj *dupStringObject(robj *o);
 831 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 832 robj *tryObjectEncoding(robj *o);
 833 robj *getDecodedObject(robj *o);
 834 size_t stringObjectLen(robj *o);
 835 robj *createStringObjectFromLongLong(long long value);
 836 robj *createStringObjectFromLongDouble(long double value);
 837 robj *createListObject(void);
 838 robj *createZiplistObject(void);
 839 robj *createSetObject(void);
 840 robj *createIntsetObject(void);
 841 robj *createHashObject(void);
 842 robj *createZsetObject(void);
 843 robj *createZsetZiplistObject(void);
 844 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 845 int checkType(redisClient *c, robj *o, int type);
 846 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 847 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 848 int getLongLongFromObject(robj *o, long long *target);
 849 int getLongDoubleFromObject(robj *o, long double *target);
 850 int getLongDoubleFromObjectOrReply(redisClient *c, robj *o, long double *target, const char *msg);
 851 char *strEncoding(int encoding);
 852 int compareStringObjects(robj *a, robj *b);
 853 int equalStringObjects(robj *a, robj *b);
 854 unsigned long estimateObjectIdleTime(robj *o);
 855
 856 /* Synchronous I/O with timeout */
 857 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 858 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 859 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 860
 861 /* Replication */
 862 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 863 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 864 void updateSlavesWaitingBgsave(int bgsaveerr);
 865 void replicationCron(void);
 866
 867 /* Generic persistence functions */
 868 void startLoading(FILE *fp);
 869 void loadingProgress(off_t pos);
 870 void stopLoading(void);
 871
 872 /* RDB persistence */
 873 #include "rdb.h"
 874
 875 /* AOF persistence */
 876 void flushAppendOnlyFile(int force);
 877 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 878 void aofRemoveTempFile(pid_t childpid);
 879 int rewriteAppendOnlyFileBackground(void);
 880 int loadAppendOnlyFile(char *filename);
 881 void stopAppendOnly(void);
 882 int startAppendOnly(void);
 883 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 884
 885 /* Sorted sets data type */
 886
 887 /* Struct to hold a inclusive/exclusive range spec. */
 888 typedef struct {
 889     double min, max;
 890     int minex, maxex; /* are min or max exclusive? */
 891 } zrangespec;
 892
 893 zskiplist *zslCreate(void);
 894 void zslFree(zskiplist *zsl);
 895 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 896 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 897 int zslDelete(zskiplist *zsl, double score, robj *obj);
 898 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 899 double zzlGetScore(unsigned char *sptr);
 900 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 901 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 902 unsigned int zsetLength(robj *zobj);
 903 void zsetConvert(robj *zobj, int encoding);
 904
 905 /* Core functions */
 906 void freeMemoryIfNeeded(void);
 907 int processCommand(redisClient *c);
 908 void setupSignalHandlers(void);
 909 struct redisCommand *lookupCommand(sds name);
 910 struct redisCommand *lookupCommandByCString(char *s);
 911 void call(redisClient *c);
 912 int prepareForShutdown();
 913 void redisLog(int level, const char *fmt, ...);
 914 void redisLogRaw(int level, const char *msg);
 915 void usage();
 916 void updateDictResizePolicy(void);
 917 int htNeedsResize(dict *dict);
 918 void oom(const char *msg);
 919 void populateCommandTable(void);
 920 void resetCommandTableStats(void);
 921
 922 /* Set data type */
 923 robj *setTypeCreate(robj *value);
 924 int setTypeAdd(robj *subject, robj *value);
 925 int setTypeRemove(robj *subject, robj *value);
 926 int setTypeIsMember(robj *subject, robj *value);
 927 setTypeIterator *setTypeInitIterator(robj *subject);
 928 void setTypeReleaseIterator(setTypeIterator *si);
 929 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 930 robj *setTypeNextObject(setTypeIterator *si);
 931 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 932 unsigned long setTypeSize(robj *subject);
 933 void setTypeConvert(robj *subject, int enc);
 934
 935 /* Hash data type */
 936 void hashTypeConvert(robj *o, int enc);
 937 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 938 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 939 robj *hashTypeGetObject(robj *o, robj *key);
 940 int hashTypeExists(robj *o, robj *key);
 941 int hashTypeSet(robj *o, robj *key, robj *value);
 942 int hashTypeDelete(robj *o, robj *key);
 943 unsigned long hashTypeLength(robj *o);
 944 hashTypeIterator *hashTypeInitIterator(robj *subject);
 945 void hashTypeReleaseIterator(hashTypeIterator *hi);
 946 int hashTypeNext(hashTypeIterator *hi);
 947 void hashTypeCurrentFromZiplist(hashTypeIterator *hi, int what,
 948                                 unsigned char **vstr,
 949                                 unsigned int *vlen,
 950                                 long long *vll);
 951 void hashTypeCurrentFromHashTable(hashTypeIterator *hi, int what, robj **dst);
 952 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 953 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 954
 955 /* Pub / Sub */
 956 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 957 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 958 void freePubsubPattern(void *p);
 959 int listMatchPubsubPattern(void *a, void *b);
 960 int pubsubPublishMessage(robj *channel, robj *message);
 961
 962 /* Configuration */
 963 void loadServerConfig(char *filename, char *options);
 964 void appendServerSaveParams(time_t seconds, int changes);
 965 void resetServerSaveParams();
 966
 967 /* db.c -- Keyspace access API */
 968 int removeExpire(redisDb *db, robj *key);
 969 void propagateExpire(redisDb *db, robj *key);
 970 int expireIfNeeded(redisDb *db, robj *key);
 971 long long getExpire(redisDb *db, robj *key);
 972 void setExpire(redisDb *db, robj *key, long long when);
 973 robj *lookupKey(redisDb *db, robj *key);
 974 robj *lookupKeyRead(redisDb *db, robj *key);
 975 robj *lookupKeyWrite(redisDb *db, robj *key);
 976 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 977 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 978 void dbAdd(redisDb *db, robj *key, robj *val);
 979 void dbOverwrite(redisDb *db, robj *key, robj *val);
 980 void setKey(redisDb *db, robj *key, robj *val);
 981 int dbExists(redisDb *db, robj *key);
 982 robj *dbRandomKey(redisDb *db);
 983 int dbDelete(redisDb *db, robj *key);
 984 long long emptyDb();
 985 int selectDb(redisClient *c, int id);
 986 void signalModifiedKey(redisDb *db, robj *key);
 987 void signalFlushedDb(int dbid);
 988 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
 989
 990 /* API to get key arguments from commands */
 991 #define REDIS_GETKEYS_ALL 0
 992 #define REDIS_GETKEYS_PRELOAD 1
 993 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 994 void getKeysFreeResult(int *result);
 995 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 996 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 997 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 998
 999 /* Cluster */
1000 void clusterInit(void);
1001 unsigned short crc16(const char *buf, int len);
1002 unsigned int keyHashSlot(char *key, int keylen);
1003 clusterNode *createClusterNode(char *nodename, int flags);
1004 int clusterAddNode(clusterNode *node);
1005 void clusterCron(void);
1006 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1007 void clusterPropagatePublish(robj *channel, robj *message);
1008
1009 /* Scripting */
1010 void scriptingInit(void);
1011
1012 /* Git SHA1 */
1013 char *redisGitSHA1(void);
1014 char *redisGitDirty(void);
1015
1016 /* Commands prototypes */
1017 void authCommand(redisClient *c);
1018 void pingCommand(redisClient *c);
1019 void echoCommand(redisClient *c);
1020 void setCommand(redisClient *c);
1021 void setnxCommand(redisClient *c);
1022 void setexCommand(redisClient *c);
1023 void psetexCommand(redisClient *c);
1024 void getCommand(redisClient *c);
1025 void delCommand(redisClient *c);
1026 void existsCommand(redisClient *c);
1027 void setbitCommand(redisClient *c);
1028 void getbitCommand(redisClient *c);
1029 void setrangeCommand(redisClient *c);
1030 void getrangeCommand(redisClient *c);
1031 void incrCommand(redisClient *c);
1032 void decrCommand(redisClient *c);
1033 void incrbyCommand(redisClient *c);
1034 void decrbyCommand(redisClient *c);
1035 void incrbyfloatCommand(redisClient *c);
1036 void selectCommand(redisClient *c);
1037 void randomkeyCommand(redisClient *c);
1038 void keysCommand(redisClient *c);
1039 void dbsizeCommand(redisClient *c);
1040 void lastsaveCommand(redisClient *c);
1041 void saveCommand(redisClient *c);
1042 void bgsaveCommand(redisClient *c);
1043 void bgrewriteaofCommand(redisClient *c);
1044 void shutdownCommand(redisClient *c);
1045 void moveCommand(redisClient *c);
1046 void renameCommand(redisClient *c);
1047 void renamenxCommand(redisClient *c);
1048 void lpushCommand(redisClient *c);
1049 void rpushCommand(redisClient *c);
1050 void lpushxCommand(redisClient *c);
1051 void rpushxCommand(redisClient *c);
1052 void linsertCommand(redisClient *c);
1053 void lpopCommand(redisClient *c);
1054 void rpopCommand(redisClient *c);
1055 void llenCommand(redisClient *c);
1056 void lindexCommand(redisClient *c);
1057 void lrangeCommand(redisClient *c);
1058 void ltrimCommand(redisClient *c);
1059 void typeCommand(redisClient *c);
1060 void lsetCommand(redisClient *c);
1061 void saddCommand(redisClient *c);
1062 void sremCommand(redisClient *c);
1063 void smoveCommand(redisClient *c);
1064 void sismemberCommand(redisClient *c);
1065 void scardCommand(redisClient *c);
1066 void spopCommand(redisClient *c);
1067 void srandmemberCommand(redisClient *c);
1068 void sinterCommand(redisClient *c);
1069 void sinterstoreCommand(redisClient *c);
1070 void sunionCommand(redisClient *c);
1071 void sunionstoreCommand(redisClient *c);
1072 void sdiffCommand(redisClient *c);
1073 void sdiffstoreCommand(redisClient *c);
1074 void syncCommand(redisClient *c);
1075 void flushdbCommand(redisClient *c);
1076 void flushallCommand(redisClient *c);
1077 void sortCommand(redisClient *c);
1078 void lremCommand(redisClient *c);
1079 void rpoplpushCommand(redisClient *c);
1080 void infoCommand(redisClient *c);
1081 void mgetCommand(redisClient *c);
1082 void monitorCommand(redisClient *c);
1083 void expireCommand(redisClient *c);
1084 void expireatCommand(redisClient *c);
1085 void pexpireCommand(redisClient *c);
1086 void pexpireatCommand(redisClient *c);
1087 void getsetCommand(redisClient *c);
1088 void ttlCommand(redisClient *c);
1089 void pttlCommand(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 hincrbyfloatCommand(redisClient *c);
1133 void subscribeCommand(redisClient *c);
1134 void unsubscribeCommand(redisClient *c);
1135 void psubscribeCommand(redisClient *c);
1136 void punsubscribeCommand(redisClient *c);
1137 void publishCommand(redisClient *c);
1138 void watchCommand(redisClient *c);
1139 void unwatchCommand(redisClient *c);
1140 void clusterCommand(redisClient *c);
1141 void restoreCommand(redisClient *c);
1142 void migrateCommand(redisClient *c);
1143 void askingCommand(redisClient *c);
1144 void dumpCommand(redisClient *c);
1145 void objectCommand(redisClient *c);
1146 void clientCommand(redisClient *c);
1147 void evalCommand(redisClient *c);
1148 void evalShaCommand(redisClient *c);
1149 void scriptCommand(redisClient *c);
1150
1151 #if defined(__GNUC__)
1152 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1153 void free(void *ptr) __attribute__ ((deprecated));
1154 void *malloc(size_t size) __attribute__ ((deprecated));
1155 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1156 #endif
1157
1158 /* Debugging stuff */
1159 void _redisAssertWithInfo(redisClient *c, robj *o, char *estr, char *file, int line);
1160 void _redisAssert(char *estr, char *file, int line);
1161 void _redisPanic(char *msg, char *file, int line);
1162 void bugReportStart(void);
1163
1164 #endif