src/redis.h

   1 #ifndef __REDIS_H
   2 #define __REDIS_H
   3
   4 #include "fmacros.h"
   5 #include "config.h"
   6
   7 #if defined(__sun)
   8 #include "solarisfixes.h"
   9 #endif
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <limits.h>
  16 #include <unistd.h>
  17 #include <errno.h>
  18 #include <inttypes.h>
  19 #include <pthread.h>
  20 #include <syslog.h>
  21 #include <netinet/in.h>
  22 #include <lua.h>
  23
  24 #include "ae.h"      /* Event driven programming library */
  25 #include "sds.h"     /* Dynamic safe strings */
  26 #include "dict.h"    /* Hash tables */
  27 #include "adlist.h"  /* Linked lists */
  28 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  29 #include "anet.h"    /* Networking the easy way */
  30 #include "zipmap.h"  /* Compact string -> string data structure */
  31 #include "ziplist.h" /* Compact list data structure */
  32 #include "intset.h"  /* Compact integer set structure */
  33 #include "version.h" /* Version macro */
  34 #include "util.h"    /* Misc functions useful in many places */
  35
  36 /* Error codes */
  37 #define REDIS_OK                0
  38 #define REDIS_ERR               -1
  39
  40 /* Static server configuration */
  41 #define REDIS_SERVERPORT        6379    /* TCP port */
  42 #define REDIS_MAXIDLETIME       0       /* default client timeout: infinite */
  43 #define REDIS_MAX_QUERYBUF_LEN  (1024*1024*1024) /* 1GB max query buffer. */
  44 #define REDIS_IOBUF_LEN         (1024*16)  /* Generic I/O buffer size */
  45 #define REDIS_DEFAULT_DBNUM     16
  46 #define REDIS_CONFIGLINE_MAX    1024
  47 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  48 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  49 #define REDIS_SHARED_INTEGERS 10000
  50 #define REDIS_REPLY_CHUNK_BYTES (16*1024) /* 16k output buffer */
  51 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  52 #define REDIS_AOF_REWRITE_PERC  100
  53 #define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
  54 #define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
  55 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  56 #define REDIS_SLOWLOG_MAX_LEN 64
  57 #define REDIS_MAX_CLIENTS 10000
  58
  59 #define REDIS_REPL_TIMEOUT 60
  60 #define REDIS_REPL_PING_SLAVE_PERIOD 10
  61 #define REDIS_MBULK_BIG_ARG (1024*32)
  62
  63 /* Hash table parameters */
  64 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  65
  66 /* Command flags. Please check the command table defined in the redis.c file
  67  * for more information about the meaning of every flag. */
  68 #define REDIS_CMD_WRITE 1                   /* "w" flag */
  69 #define REDIS_CMD_READONLY 2                /* "r" flag */
  70 #define REDIS_CMD_DENYOOM 4                 /* "m" flag */
  71 #define REDIS_CMD_FORCE_REPLICATION 8       /* "f" flag */
  72 #define REDIS_CMD_ADMIN 16                  /* "a" flag */
  73 #define REDIS_CMD_PUBSUB 32                 /* "p" flag */
  74 #define REDIS_CMD_NOSCRIPT  64              /* "s" flag */
  75 #define REDIS_CMD_RANDOM 128                /* "R" flag */
  76
  77 /* Object types */
  78 #define REDIS_STRING 0
  79 #define REDIS_LIST 1
  80 #define REDIS_SET 2
  81 #define REDIS_ZSET 3
  82 #define REDIS_HASH 4
  83 #define REDIS_VMPOINTER 8
  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 /* Defines related to the dump file format. To store 32 bits lengths for short
  98  * keys requires a lot of space, so we check the most significant 2 bits of
  99  * the first byte to interpreter the length:
 100  *
 101  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 102  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 103  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 104  * 11|000000 this means: specially encoded object will follow. The six bits
 105  *           number specify the kind of object that follows.
 106  *           See the REDIS_RDB_ENC_* defines.
 107  *
 108  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 109  * values, will fit inside. */
 110 #define REDIS_RDB_6BITLEN 0
 111 #define REDIS_RDB_14BITLEN 1
 112 #define REDIS_RDB_32BITLEN 2
 113 #define REDIS_RDB_ENCVAL 3
 114 #define REDIS_RDB_LENERR UINT_MAX
 115
 116 /* When a length of a string object stored on disk has the first two bits
 117  * set, the remaining two bits specify a special encoding for the object
 118  * accordingly to the following defines: */
 119 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 120 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 121 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 122 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 123
 124 /* AOF states */
 125 #define REDIS_AOF_OFF 0             /* AOF is off */
 126 #define REDIS_AOF_ON 1              /* AOF is on */
 127 #define REDIS_AOF_WAIT_REWRITE 2    /* AOF waits rewrite to start appending */
 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 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 140 #define REDIS_ASKING 1024   /* Client issued the ASKING command */
 141
 142 /* Client request types */
 143 #define REDIS_REQ_INLINE 1
 144 #define REDIS_REQ_MULTIBULK 2
 145
 146 /* Slave replication state - slave side */
 147 #define REDIS_REPL_NONE 0 /* No active replication */
 148 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
 149 #define REDIS_REPL_CONNECTING 2 /* Connecting to master */
 150 #define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
 151 #define REDIS_REPL_CONNECTED 4 /* Connected to master */
 152
 153 /* Synchronous read timeout - slave side */
 154 #define REDIS_REPL_SYNCIO_TIMEOUT 5
 155
 156 /* Slave replication state - from the point of view of master
 157  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 158  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 159  * to start the next background saving in order to send updates to it. */
 160 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 161 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 162 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 163 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 164
 165 /* List related stuff */
 166 #define REDIS_HEAD 0
 167 #define REDIS_TAIL 1
 168
 169 /* Sort operations */
 170 #define REDIS_SORT_GET 0
 171 #define REDIS_SORT_ASC 1
 172 #define REDIS_SORT_DESC 2
 173 #define REDIS_SORTKEY_MAX 1024
 174
 175 /* Log levels */
 176 #define REDIS_DEBUG 0
 177 #define REDIS_VERBOSE 1
 178 #define REDIS_NOTICE 2
 179 #define REDIS_WARNING 3
 180 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 181
 182 /* Anti-warning macro... */
 183 #define REDIS_NOTUSED(V) ((void) V)
 184
 185 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 186 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 187
 188 /* Append only defines */
 189 #define AOF_FSYNC_NO 0
 190 #define AOF_FSYNC_ALWAYS 1
 191 #define AOF_FSYNC_EVERYSEC 2
 192
 193 /* Zip structure related defaults */
 194 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 195 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 196 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 197 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 198 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 199 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 200 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 201
 202 /* Sets operations codes */
 203 #define REDIS_OP_UNION 0
 204 #define REDIS_OP_DIFF 1
 205 #define REDIS_OP_INTER 2
 206
 207 /* Redis maxmemory strategies */
 208 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 209 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 210 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 211 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 212 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 213 #define REDIS_MAXMEMORY_NO_EVICTION 5
 214
 215 /* Scripting */
 216 #define REDIS_LUA_TIME_LIMIT 5000 /* milliseconds */
 217
 218 /* Units */
 219 #define UNIT_SECONDS 0
 220 #define UNIT_MILLISECONDS 1
 221
 222 /* SHUTDOWN flags */
 223 #define REDIS_SHUTDOWN_SAVE 1       /* Force SAVE on SHUTDOWN even if no save
 224                                        points are configured. */
 225 #define REDIS_SHUTDOWN_NOSAVE 2     /* Don't SAVE on SHUTDOWN. */
 226
 227 /* We can print the stacktrace, so our assert is defined this way: */
 228 #define redisAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_redisAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),_exit(1)))
 229 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 230 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 231
 232 /*-----------------------------------------------------------------------------
 233  * Data types
 234  *----------------------------------------------------------------------------*/
 235
 236 /* A redis object, that is a type able to hold a string / list / set */
 237
 238 /* The actual Redis Object */
 239 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 240 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 241 typedef struct redisObject {
 242     unsigned type:4;
 243     unsigned notused:2;     /* Not used */
 244     unsigned encoding:4;
 245     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 246     int refcount;
 247     void *ptr;
 248 } robj;
 249
 250 /* Macro used to initalize a Redis object allocated on the stack.
 251  * Note that this macro is taken near the structure definition to make sure
 252  * we'll update it when the structure is changed, to avoid bugs like
 253  * bug #85 introduced exactly in this way. */
 254 #define initStaticStringObject(_var,_ptr) do { \
 255     _var.refcount = 1; \
 256     _var.type = REDIS_STRING; \
 257     _var.encoding = REDIS_ENCODING_RAW; \
 258     _var.ptr = _ptr; \
 259 } while(0);
 260
 261 typedef struct redisDb {
 262     dict *dict;                 /* The keyspace for this DB */
 263     dict *expires;              /* Timeout of keys with a timeout set */
 264     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 265     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 266     int id;
 267 } redisDb;
 268
 269 /* Client MULTI/EXEC state */
 270 typedef struct multiCmd {
 271     robj **argv;
 272     int argc;
 273     struct redisCommand *cmd;
 274 } multiCmd;
 275
 276 typedef struct multiState {
 277     multiCmd *commands;     /* Array of MULTI commands */
 278     int count;              /* Total number of MULTI commands */
 279 } multiState;
 280
 281 typedef struct blockingState {
 282     robj **keys;            /* The key we are waiting to terminate a blocking
 283                              * operation such as BLPOP. Otherwise NULL. */
 284     int count;              /* Number of blocking keys */
 285     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 286                              * is >= timeout then the operation timed out. */
 287     robj *target;           /* The key that should receive the element,
 288                              * for BRPOPLPUSH. */
 289 } blockingState;
 290
 291 /* With multiplexing we need to take per-clinet state.
 292  * Clients are taken in a liked list. */
 293 typedef struct redisClient {
 294     int fd;
 295     redisDb *db;
 296     int dictid;
 297     sds querybuf;
 298     int argc;
 299     robj **argv;
 300     struct redisCommand *cmd, *lastcmd;
 301     int reqtype;
 302     int multibulklen;       /* number of multi bulk arguments left to read */
 303     long bulklen;           /* length of bulk argument in multi bulk request */
 304     list *reply;
 305     int sentlen;
 306     time_t lastinteraction; /* time of the last interaction, used for timeout */
 307     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 308     int slaveseldb;         /* slave selected db, if this client is a slave */
 309     int authenticated;      /* when requirepass is non-NULL */
 310     int replstate;          /* replication state if this is a slave */
 311     int repldbfd;           /* replication DB file descriptor */
 312     long repldboff;         /* replication DB file offset */
 313     off_t repldbsize;       /* replication DB file size */
 314     multiState mstate;      /* MULTI/EXEC state */
 315     blockingState bpop;   /* blocking state */
 316     list *io_keys;          /* Keys this client is waiting to be loaded from the
 317                              * swap file in order to continue. */
 318     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 319     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 320     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 321
 322     /* Response buffer */
 323     int bufpos;
 324     char buf[REDIS_REPLY_CHUNK_BYTES];
 325 } redisClient;
 326
 327 struct saveparam {
 328     time_t seconds;
 329     int changes;
 330 };
 331
 332 struct sharedObjectsStruct {
 333     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 334     *colon, *nullbulk, *nullmultibulk, *queued,
 335     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 336     *outofrangeerr, *noscripterr, *loadingerr, *slowscripterr, *plus,
 337     *select0, *select1, *select2, *select3, *select4,
 338     *select5, *select6, *select7, *select8, *select9,
 339     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 340     *mbulk4, *psubscribebulk, *punsubscribebulk,
 341     *integers[REDIS_SHARED_INTEGERS];
 342 };
 343
 344 /* ZSETs use a specialized version of Skiplists */
 345 typedef struct zskiplistNode {
 346     robj *obj;
 347     double score;
 348     struct zskiplistNode *backward;
 349     struct zskiplistLevel {
 350         struct zskiplistNode *forward;
 351         unsigned int span;
 352     } level[];
 353 } zskiplistNode;
 354
 355 typedef struct zskiplist {
 356     struct zskiplistNode *header, *tail;
 357     unsigned long length;
 358     int level;
 359 } zskiplist;
 360
 361 typedef struct zset {
 362     dict *dict;
 363     zskiplist *zsl;
 364 } zset;
 365
 366 /*-----------------------------------------------------------------------------
 367  * Redis cluster data structures
 368  *----------------------------------------------------------------------------*/
 369
 370 #define REDIS_CLUSTER_SLOTS 4096
 371 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 372 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 373 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 374 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 375 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 376
 377 struct clusterNode;
 378
 379 /* clusterLink encapsulates everything needed to talk with a remote node. */
 380 typedef struct clusterLink {
 381     int fd;                     /* TCP socket file descriptor */
 382     sds sndbuf;                 /* Packet send buffer */
 383     sds rcvbuf;                 /* Packet reception buffer */
 384     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 385 } clusterLink;
 386
 387 /* Node flags */
 388 #define REDIS_NODE_MASTER 1     /* The node is a master */
 389 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 390 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 391 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 392 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 393 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 394 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 395 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 396 #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"
 397
 398 struct clusterNode {
 399     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 400     int flags;      /* REDIS_NODE_... */
 401     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 402     int numslaves;  /* Number of slave nodes, if this is a master */
 403     struct clusterNode **slaves; /* pointers to slave nodes */
 404     struct clusterNode *slaveof; /* pointer to the master node */
 405     time_t ping_sent;       /* Unix time we sent latest ping */
 406     time_t pong_received;   /* Unix time we received the pong */
 407     char *configdigest;         /* Configuration digest of this node */
 408     time_t configdigest_ts;     /* Configuration digest timestamp */
 409     char ip[16];                /* Latest known IP address of this node */
 410     int port;                   /* Latest known port of this node */
 411     clusterLink *link;          /* TCP/IP link with this node */
 412 };
 413 typedef struct clusterNode clusterNode;
 414
 415 typedef struct {
 416     char *configfile;
 417     clusterNode *myself;  /* This node */
 418     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 419     int node_timeout;
 420     dict *nodes;          /* Hash table of name -> clusterNode structures */
 421     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 422     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 423     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 424     zskiplist *slots_to_keys;
 425 } clusterState;
 426
 427 /* Redis cluster messages header */
 428
 429 /* Note that the PING, PONG and MEET messages are actually the same exact
 430  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 431  * while MEET is a special PING that forces the receiver to add the sender
 432  * as a node (if it is not already in the list). */
 433 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 434 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 435 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 436 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 437 #define CLUSTERMSG_TYPE_PUBLISH 4       /* Pub/Sub Publish propatagion */
 438
 439 /* Initially we don't know our "name", but we'll find it once we connect
 440  * to the first node, using the getsockname() function. Then we'll use this
 441  * address for all the next messages. */
 442 typedef struct {
 443     char nodename[REDIS_CLUSTER_NAMELEN];
 444     uint32_t ping_sent;
 445     uint32_t pong_received;
 446     char ip[16];    /* IP address last time it was seen */
 447     uint16_t port;  /* port last time it was seen */
 448     uint16_t flags;
 449     uint32_t notused; /* for 64 bit alignment */
 450 } clusterMsgDataGossip;
 451
 452 typedef struct {
 453     char nodename[REDIS_CLUSTER_NAMELEN];
 454 } clusterMsgDataFail;
 455
 456 typedef struct {
 457     uint32_t channel_len;
 458     uint32_t message_len;
 459     unsigned char bulk_data[8]; /* defined as 8 just for alignment concerns. */
 460 } clusterMsgDataPublish;
 461
 462 union clusterMsgData {
 463     /* PING, MEET and PONG */
 464     struct {
 465         /* Array of N clusterMsgDataGossip structures */
 466         clusterMsgDataGossip gossip[1];
 467     } ping;
 468
 469     /* FAIL */
 470     struct {
 471         clusterMsgDataFail about;
 472     } fail;
 473
 474     /* PUBLISH */
 475     struct {
 476         clusterMsgDataPublish msg;
 477     } publish;
 478 };
 479
 480 typedef struct {
 481     uint32_t totlen;    /* Total length of this message */
 482     uint16_t type;      /* Message type */
 483     uint16_t count;     /* Only used for some kind of messages. */
 484     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 485     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 486     char slaveof[REDIS_CLUSTER_NAMELEN];
 487     char configdigest[32];
 488     uint16_t port;      /* Sender TCP base port */
 489     unsigned char state; /* Cluster state from the POV of the sender */
 490     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 491     union clusterMsgData data;
 492 } clusterMsg;
 493
 494 /*-----------------------------------------------------------------------------
 495  * Global server state
 496  *----------------------------------------------------------------------------*/
 497
 498 struct redisServer {
 499     /* General */
 500     redisDb *db;
 501     dict *commands;             /* Command table hahs table */
 502     aeEventLoop *el;
 503     unsigned lruclock:22;       /* Clock incrementing every minute, for LRU */
 504     unsigned lruclock_padding:10;
 505     int shutdown_asap;          /* SHUTDOWN needed ASAP */
 506     int activerehashing;        /* Incremental rehash in serverCron() */
 507     char *requirepass;          /* Pass for AUTH command, or NULL */
 508     char *pidfile;              /* PID file path */
 509     /* Networking */
 510     int port;                   /* TCP listening port */
 511     char *bindaddr;             /* Bind address or NULL */
 512     char *unixsocket;           /* UNIX socket path */
 513     mode_t unixsocketperm;      /* UNIX socket permission */
 514     int ipfd;                   /* TCP socket file descriptor */
 515     int sofd;                   /* Unix socket file descriptor */
 516     int cfd;                    /* Cluster bus lisetning socket */
 517     list *clients;              /* List of active clients */
 518     list *slaves, *monitors;    /* List of slaves and MONITORs */
 519     char neterr[ANET_ERR_LEN];  /* Error buffer for anet.c */
 520     /* RDB / AOF loading information */
 521     int loading;                /* We are loading data from disk if true */
 522     off_t loading_total_bytes;
 523     off_t loading_loaded_bytes;
 524     time_t loading_start_time;
 525     /* Fast pointers to often looked up command */
 526     struct redisCommand *delCommand, *multiCommand;
 527     int cronloops;                  /* Number of times the cron function run */
 528     time_t lastsave;                /* Unix time of last save succeeede */
 529     /* Fields used only for stats */
 530     time_t stat_starttime;          /* Server start time */
 531     long long stat_numcommands;     /* Number of processed commands */
 532     long long stat_numconnections;  /* Number of connections received */
 533     long long stat_expiredkeys;     /* Number of expired keys */
 534     long long stat_evictedkeys;     /* Number of evicted keys (maxmemory) */
 535     long long stat_keyspace_hits;   /* Number of successful lookups of keys */
 536     long long stat_keyspace_misses; /* Number of failed lookups of keys */
 537     size_t stat_peak_memory;        /* Max used memory record */
 538     long long stat_fork_time;       /* Time needed to perform latets fork() */
 539     long long stat_rejected_conn;   /* Clients rejected because of maxclients */
 540     list *slowlog;                  /* SLOWLOG list of commands */
 541     long long slowlog_entry_id;     /* SLOWLOG current entry ID */
 542     long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
 543     unsigned long slowlog_max_len;     /* SLOWLOG max number of items logged */
 544     /* Configuration */
 545     int verbosity;                  /* Loglevel in redis.conf */
 546     int maxidletime;                /* Client timeout in seconds */
 547     size_t client_max_querybuf_len; /* Limit for client query buffer length */
 548     int dbnum;                      /* Total number of configured DBs */
 549     int daemonize;                  /* True if running as a daemon */
 550     /* AOF persistence */
 551     int aof_state;                  /* REDIS_AOF_(ON|OFF|WAIT_REWRITE) */
 552     int aof_fsync;                  /* Kind of fsync() policy */
 553     char *aof_filename;             /* Name of the AOF file */
 554     int aof_no_fsync_on_rewrite;    /* Don't fsync if a rewrite is in prog. */
 555     int aof_rewrite_perc;           /* Rewrite AOF if % growth is > M and... */
 556     off_t aof_rewrite_min_size;     /* the AOF file is at least N bytes. */
 557     off_t aof_rewrite_base_size;    /* AOF size on latest startup or rewrite. */
 558     off_t aof_current_size;         /* AOF current size. */
 559     int aof_rewrite_scheduled;      /* Rewrite once BGSAVE terminates. */
 560     pid_t aof_child_pid;            /* PID if rewriting process */
 561     sds aof_rewrite_buf; /* buffer taken by parent during oppend only rewrite */
 562     sds aof_buf;      /* AOF buffer, written before entering the event loop */
 563     int aof_fd;       /* File descriptor of currently selected AOF file */
 564     int aof_selected_db; /* Currently selected DB in AOF */
 565     time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
 566     time_t aof_last_fsync;            /* UNIX time of last fsync() */
 567     /* RDB persistence */
 568     long long dirty;                /* Changes to DB from the last save */
 569     long long dirty_before_bgsave;  /* Used to restore dirty on failed BGSAVE */
 570     pid_t rdb_child_pid;            /* PID of RDB saving child */
 571     struct saveparam *saveparams;   /* Save points array for RDB */
 572     int saveparamslen;              /* Number of saving points */
 573     char *rdb_filename;             /* Name of RDB file */
 574     int rdb_compression;            /* Use compression in RDB? */
 575     /* Logging */
 576     char *logfile;                  /* Path of log file */
 577     int syslog_enabled;             /* Is syslog enabled? */
 578     char *syslog_ident;             /* Syslog ident */
 579     int syslog_facility;            /* Syslog facility */
 580     /* Slave specific fields */
 581     char *masterauth;               /* AUTH with this password with master */
 582     char *masterhost;               /* Hostname of master */
 583     int masterport;                 /* Port of master */
 584     int repl_ping_slave_period;     /* Master pings the salve every N seconds */
 585     int repl_timeout;               /* Timeout after N seconds of master idle */
 586     redisClient *master;     /* Client that is master for this slave */
 587     int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
 588     int repl_state;          /* Replication status if the instance is a slave */
 589     off_t repl_transfer_left;  /* Bytes left reading .rdb  */
 590     int repl_transfer_s;     /* Slave -> Master SYNC socket */
 591     int repl_transfer_fd;    /* Slave -> Master SYNC temp file descriptor */
 592     char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
 593     time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
 594     int repl_serve_stale_data; /* Serve stale data when link is down? */
 595     time_t repl_down_since; /* Unix time at which link with master went down */
 596     /* Limits */
 597     unsigned int maxclients;        /* Max number of simultaneous clients */
 598     unsigned long long maxmemory;   /* Max number of memory bytes to use */
 599     int maxmemory_policy;           /* Policy for key evition */
 600     int maxmemory_samples;          /* Pricision of random sampling */
 601     /* Blocked clients */
 602     unsigned int bpop_blocked_clients; /* Number of clients blocked by lists */
 603     list *unblocked_clients; /* list of clients to unblock before next loop */
 604     /* Sort parameters - qsort_r() is only available under BSD so we
 605      * have to take this state global, in order to pass it to sortCompare() */
 606     int sort_desc;
 607     int sort_alpha;
 608     int sort_bypattern;
 609     /* Zip structure config, see redis.conf for more information  */
 610     size_t hash_max_zipmap_entries;
 611     size_t hash_max_zipmap_value;
 612     size_t list_max_ziplist_entries;
 613     size_t list_max_ziplist_value;
 614     size_t set_max_intset_entries;
 615     size_t zset_max_ziplist_entries;
 616     size_t zset_max_ziplist_value;
 617     time_t unixtime;        /* Unix time sampled every second. */
 618     /* Pubsub */
 619     dict *pubsub_channels;  /* Map channels to list of subscribed clients */
 620     list *pubsub_patterns;  /* A list of pubsub_patterns */
 621     /* Cluster */
 622     int cluster_enabled;    /* Is cluster enabled? */
 623     clusterState cluster;   /* State of the cluster */
 624     /* Scripting */
 625     lua_State *lua; /* The Lua interpreter. We use just one for all clients */
 626     redisClient *lua_client;   /* The "fake client" to query Redis from Lua */
 627     redisClient *lua_caller;   /* The client running EVAL right now, or NULL */
 628     dict *lua_scripts;         /* A dictionary of SHA1 -> Lua scripts */
 629     long long lua_time_limit;  /* Script timeout in seconds */
 630     long long lua_time_start;  /* Start time of script */
 631     int lua_write_dirty;  /* True if a write command was called during the
 632                              execution of the current script. */
 633     int lua_random_dirty; /* True if a random command was called during the
 634                              execution of the current script. */
 635     int lua_timedout;     /* True if we reached the time limit for script
 636                              execution. */
 637     int lua_kill;         /* Kill the script if true. */
 638     /* Assert & bug reportign */
 639     char *assert_failed;
 640     char *assert_file;
 641     int assert_line;
 642     int bug_report_start; /* True if bug report header was already logged. */
 643 };
 644
 645 typedef struct pubsubPattern {
 646     redisClient *client;
 647     robj *pattern;
 648 } pubsubPattern;
 649
 650 typedef void redisCommandProc(redisClient *c);
 651 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 652 struct redisCommand {
 653     char *name;
 654     redisCommandProc *proc;
 655     int arity;
 656     char *sflags; /* Flags as string represenation, one char per flag. */
 657     int flags;    /* The actual flags, obtained from the 'sflags' field. */
 658     /* Use a function to determine keys arguments in a command line.
 659      * Used for Redis Cluster redirect. */
 660     redisGetKeysProc *getkeys_proc;
 661     /* What keys should be loaded in background when calling this command? */
 662     int firstkey; /* The first argument that's a key (0 = no keys) */
 663     int lastkey;  /* THe last argument that's a key */
 664     int keystep;  /* The step between first and last key */
 665     long long microseconds, calls;
 666 };
 667
 668 struct redisFunctionSym {
 669     char *name;
 670     unsigned long pointer;
 671 };
 672
 673 typedef struct _redisSortObject {
 674     robj *obj;
 675     union {
 676         double score;
 677         robj *cmpobj;
 678     } u;
 679 } redisSortObject;
 680
 681 typedef struct _redisSortOperation {
 682     int type;
 683     robj *pattern;
 684 } redisSortOperation;
 685
 686 /* Structure to hold list iteration abstraction. */
 687 typedef struct {
 688     robj *subject;
 689     unsigned char encoding;
 690     unsigned char direction; /* Iteration direction */
 691     unsigned char *zi;
 692     listNode *ln;
 693 } listTypeIterator;
 694
 695 /* Structure for an entry while iterating over a list. */
 696 typedef struct {
 697     listTypeIterator *li;
 698     unsigned char *zi;  /* Entry in ziplist */
 699     listNode *ln;       /* Entry in linked list */
 700 } listTypeEntry;
 701
 702 /* Structure to hold set iteration abstraction. */
 703 typedef struct {
 704     robj *subject;
 705     int encoding;
 706     int ii; /* intset iterator */
 707     dictIterator *di;
 708 } setTypeIterator;
 709
 710 /* Structure to hold hash iteration abstration. Note that iteration over
 711  * hashes involves both fields and values. Because it is possible that
 712  * not both are required, store pointers in the iterator to avoid
 713  * unnecessary memory allocation for fields/values. */
 714 typedef struct {
 715     int encoding;
 716     unsigned char *zi;
 717     unsigned char *zk, *zv;
 718     unsigned int zklen, zvlen;
 719
 720     dictIterator *di;
 721     dictEntry *de;
 722 } hashTypeIterator;
 723
 724 #define REDIS_HASH_KEY 1
 725 #define REDIS_HASH_VALUE 2
 726
 727 /*-----------------------------------------------------------------------------
 728  * Extern declarations
 729  *----------------------------------------------------------------------------*/
 730
 731 extern struct redisServer server;
 732 extern struct sharedObjectsStruct shared;
 733 extern dictType setDictType;
 734 extern dictType zsetDictType;
 735 extern dictType clusterNodesDictType;
 736 extern dictType dbDictType;
 737 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 738 dictType hashDictType;
 739
 740 /*-----------------------------------------------------------------------------
 741  * Functions prototypes
 742  *----------------------------------------------------------------------------*/
 743
 744 /* Utils */
 745 long long ustime(void);
 746 long long mstime(void);
 747
 748 /* networking.c -- Networking and Client related operations */
 749 redisClient *createClient(int fd);
 750 void closeTimedoutClients(void);
 751 void freeClient(redisClient *c);
 752 void resetClient(redisClient *c);
 753 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 754 void addReply(redisClient *c, robj *obj);
 755 void *addDeferredMultiBulkLength(redisClient *c);
 756 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 757 void addReplySds(redisClient *c, sds s);
 758 void processInputBuffer(redisClient *c);
 759 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 760 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 761 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 762 void addReplyBulk(redisClient *c, robj *obj);
 763 void addReplyBulkCString(redisClient *c, char *s);
 764 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 765 void addReplyBulkLongLong(redisClient *c, long long ll);
 766 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 767 void addReply(redisClient *c, robj *obj);
 768 void addReplySds(redisClient *c, sds s);
 769 void addReplyError(redisClient *c, char *err);
 770 void addReplyStatus(redisClient *c, char *status);
 771 void addReplyDouble(redisClient *c, double d);
 772 void addReplyLongLong(redisClient *c, long long ll);
 773 void addReplyMultiBulkLen(redisClient *c, long length);
 774 void copyClientOutputBuffer(redisClient *dst, redisClient *src);
 775 void *dupClientReplyValue(void *o);
 776 void getClientsMaxBuffers(unsigned long *longest_output_list,
 777                           unsigned long *biggest_input_buffer);
 778 sds getClientInfoString(redisClient *client);
 779 sds getAllClientsInfoString(void);
 780 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 781 void rewriteClientCommandArgument(redisClient *c, int i, robj *newval);
 782
 783 #ifdef __GNUC__
 784 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 785     __attribute__((format(printf, 2, 3)));
 786 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 787     __attribute__((format(printf, 2, 3)));
 788 #else
 789 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 790 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 791 #endif
 792
 793 /* List data type */
 794 void listTypeTryConversion(robj *subject, robj *value);
 795 void listTypePush(robj *subject, robj *value, int where);
 796 robj *listTypePop(robj *subject, int where);
 797 unsigned long listTypeLength(robj *subject);
 798 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 799 void listTypeReleaseIterator(listTypeIterator *li);
 800 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 801 robj *listTypeGet(listTypeEntry *entry);
 802 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 803 int listTypeEqual(listTypeEntry *entry, robj *o);
 804 void listTypeDelete(listTypeEntry *entry);
 805 void listTypeConvert(robj *subject, int enc);
 806 void unblockClientWaitingData(redisClient *c);
 807 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 808 void popGenericCommand(redisClient *c, int where);
 809
 810 /* MULTI/EXEC/WATCH... */
 811 void unwatchAllKeys(redisClient *c);
 812 void initClientMultiState(redisClient *c);
 813 void freeClientMultiState(redisClient *c);
 814 void queueMultiCommand(redisClient *c);
 815 void touchWatchedKey(redisDb *db, robj *key);
 816 void touchWatchedKeysOnFlush(int dbid);
 817
 818 /* Redis object implementation */
 819 void decrRefCount(void *o);
 820 void incrRefCount(robj *o);
 821 robj *resetRefCount(robj *obj);
 822 void freeStringObject(robj *o);
 823 void freeListObject(robj *o);
 824 void freeSetObject(robj *o);
 825 void freeZsetObject(robj *o);
 826 void freeHashObject(robj *o);
 827 robj *createObject(int type, void *ptr);
 828 robj *createStringObject(char *ptr, size_t len);
 829 robj *dupStringObject(robj *o);
 830 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 831 robj *tryObjectEncoding(robj *o);
 832 robj *getDecodedObject(robj *o);
 833 size_t stringObjectLen(robj *o);
 834 robj *createStringObjectFromLongLong(long long value);
 835 robj *createStringObjectFromLongDouble(long double value);
 836 robj *createListObject(void);
 837 robj *createZiplistObject(void);
 838 robj *createSetObject(void);
 839 robj *createIntsetObject(void);
 840 robj *createHashObject(void);
 841 robj *createZsetObject(void);
 842 robj *createZsetZiplistObject(void);
 843 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 844 int checkType(redisClient *c, robj *o, int type);
 845 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 846 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 847 int getLongLongFromObject(robj *o, long long *target);
 848 int getLongDoubleFromObject(robj *o, long double *target);
 849 int getLongDoubleFromObjectOrReply(redisClient *c, robj *o, long double *target, const char *msg);
 850 char *strEncoding(int encoding);
 851 int compareStringObjects(robj *a, robj *b);
 852 int equalStringObjects(robj *a, robj *b);
 853 unsigned long estimateObjectIdleTime(robj *o);
 854
 855 /* Synchronous I/O with timeout */
 856 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 857 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 858 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 859
 860 /* Replication */
 861 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 862 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 863 void updateSlavesWaitingBgsave(int bgsaveerr);
 864 void replicationCron(void);
 865
 866 /* Generic persistence functions */
 867 void startLoading(FILE *fp);
 868 void loadingProgress(off_t pos);
 869 void stopLoading(void);
 870
 871 /* RDB persistence */
 872 #include "rdb.h"
 873
 874 /* AOF persistence */
 875 void flushAppendOnlyFile(int force);
 876 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 877 void aofRemoveTempFile(pid_t childpid);
 878 int rewriteAppendOnlyFileBackground(void);
 879 int loadAppendOnlyFile(char *filename);
 880 void stopAppendOnly(void);
 881 int startAppendOnly(void);
 882 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 883
 884 /* Sorted sets data type */
 885
 886 /* Struct to hold a inclusive/exclusive range spec. */
 887 typedef struct {
 888     double min, max;
 889     int minex, maxex; /* are min or max exclusive? */
 890 } zrangespec;
 891
 892 zskiplist *zslCreate(void);
 893 void zslFree(zskiplist *zsl);
 894 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 895 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 896 int zslDelete(zskiplist *zsl, double score, robj *obj);
 897 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 898 double zzlGetScore(unsigned char *sptr);
 899 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 900 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 901 unsigned int zsetLength(robj *zobj);
 902 void zsetConvert(robj *zobj, int encoding);
 903
 904 /* Core functions */
 905 void freeMemoryIfNeeded(void);
 906 int processCommand(redisClient *c);
 907 void setupSignalHandlers(void);
 908 struct redisCommand *lookupCommand(sds name);
 909 struct redisCommand *lookupCommandByCString(char *s);
 910 void call(redisClient *c);
 911 int prepareForShutdown();
 912 void redisLog(int level, const char *fmt, ...);
 913 void redisLogRaw(int level, const char *msg);
 914 void usage();
 915 void updateDictResizePolicy(void);
 916 int htNeedsResize(dict *dict);
 917 void oom(const char *msg);
 918 void populateCommandTable(void);
 919 void resetCommandTableStats(void);
 920
 921 /* Set data type */
 922 robj *setTypeCreate(robj *value);
 923 int setTypeAdd(robj *subject, robj *value);
 924 int setTypeRemove(robj *subject, robj *value);
 925 int setTypeIsMember(robj *subject, robj *value);
 926 setTypeIterator *setTypeInitIterator(robj *subject);
 927 void setTypeReleaseIterator(setTypeIterator *si);
 928 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 929 robj *setTypeNextObject(setTypeIterator *si);
 930 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 931 unsigned long setTypeSize(robj *subject);
 932 void setTypeConvert(robj *subject, int enc);
 933
 934 /* Hash data type */
 935 void convertToRealHash(robj *o);
 936 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 937 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 938 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 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 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 948 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 949 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 950
 951 /* Pub / Sub */
 952 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 953 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 954 void freePubsubPattern(void *p);
 955 int listMatchPubsubPattern(void *a, void *b);
 956 int pubsubPublishMessage(robj *channel, robj *message);
 957
 958 /* Configuration */
 959 void loadServerConfig(char *filename, char *options);
 960 void appendServerSaveParams(time_t seconds, int changes);
 961 void resetServerSaveParams();
 962
 963 /* db.c -- Keyspace access API */
 964 int removeExpire(redisDb *db, robj *key);
 965 void propagateExpire(redisDb *db, robj *key);
 966 int expireIfNeeded(redisDb *db, robj *key);
 967 long long getExpire(redisDb *db, robj *key);
 968 void setExpire(redisDb *db, robj *key, long long when);
 969 robj *lookupKey(redisDb *db, robj *key);
 970 robj *lookupKeyRead(redisDb *db, robj *key);
 971 robj *lookupKeyWrite(redisDb *db, robj *key);
 972 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 973 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 974 void dbAdd(redisDb *db, robj *key, robj *val);
 975 void dbOverwrite(redisDb *db, robj *key, robj *val);
 976 void setKey(redisDb *db, robj *key, robj *val);
 977 int dbExists(redisDb *db, robj *key);
 978 robj *dbRandomKey(redisDb *db);
 979 int dbDelete(redisDb *db, robj *key);
 980 long long emptyDb();
 981 int selectDb(redisClient *c, int id);
 982 void signalModifiedKey(redisDb *db, robj *key);
 983 void signalFlushedDb(int dbid);
 984 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
 985
 986 /* API to get key arguments from commands */
 987 #define REDIS_GETKEYS_ALL 0
 988 #define REDIS_GETKEYS_PRELOAD 1
 989 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 990 void getKeysFreeResult(int *result);
 991 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 992 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 993 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
 994
 995 /* Cluster */
 996 void clusterInit(void);
 997 unsigned short crc16(const char *buf, int len);
 998 unsigned int keyHashSlot(char *key, int keylen);
 999 clusterNode *createClusterNode(char *nodename, int flags);
1000 int clusterAddNode(clusterNode *node);
1001 void clusterCron(void);
1002 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1003 void clusterPropagatePublish(robj *channel, robj *message);
1004
1005 /* Scripting */
1006 void scriptingInit(void);
1007
1008 /* Git SHA1 */
1009 char *redisGitSHA1(void);
1010 char *redisGitDirty(void);
1011
1012 /* Commands prototypes */
1013 void authCommand(redisClient *c);
1014 void pingCommand(redisClient *c);
1015 void echoCommand(redisClient *c);
1016 void setCommand(redisClient *c);
1017 void setnxCommand(redisClient *c);
1018 void setexCommand(redisClient *c);
1019 void psetexCommand(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 incrbyfloatCommand(redisClient *c);
1032 void selectCommand(redisClient *c);
1033 void randomkeyCommand(redisClient *c);
1034 void keysCommand(redisClient *c);
1035 void dbsizeCommand(redisClient *c);
1036 void lastsaveCommand(redisClient *c);
1037 void saveCommand(redisClient *c);
1038 void bgsaveCommand(redisClient *c);
1039 void bgrewriteaofCommand(redisClient *c);
1040 void shutdownCommand(redisClient *c);
1041 void moveCommand(redisClient *c);
1042 void renameCommand(redisClient *c);
1043 void renamenxCommand(redisClient *c);
1044 void lpushCommand(redisClient *c);
1045 void rpushCommand(redisClient *c);
1046 void lpushxCommand(redisClient *c);
1047 void rpushxCommand(redisClient *c);
1048 void linsertCommand(redisClient *c);
1049 void lpopCommand(redisClient *c);
1050 void rpopCommand(redisClient *c);
1051 void llenCommand(redisClient *c);
1052 void lindexCommand(redisClient *c);
1053 void lrangeCommand(redisClient *c);
1054 void ltrimCommand(redisClient *c);
1055 void typeCommand(redisClient *c);
1056 void lsetCommand(redisClient *c);
1057 void saddCommand(redisClient *c);
1058 void sremCommand(redisClient *c);
1059 void smoveCommand(redisClient *c);
1060 void sismemberCommand(redisClient *c);
1061 void scardCommand(redisClient *c);
1062 void spopCommand(redisClient *c);
1063 void srandmemberCommand(redisClient *c);
1064 void sinterCommand(redisClient *c);
1065 void sinterstoreCommand(redisClient *c);
1066 void sunionCommand(redisClient *c);
1067 void sunionstoreCommand(redisClient *c);
1068 void sdiffCommand(redisClient *c);
1069 void sdiffstoreCommand(redisClient *c);
1070 void syncCommand(redisClient *c);
1071 void flushdbCommand(redisClient *c);
1072 void flushallCommand(redisClient *c);
1073 void sortCommand(redisClient *c);
1074 void lremCommand(redisClient *c);
1075 void rpoplpushCommand(redisClient *c);
1076 void infoCommand(redisClient *c);
1077 void mgetCommand(redisClient *c);
1078 void monitorCommand(redisClient *c);
1079 void expireCommand(redisClient *c);
1080 void expireatCommand(redisClient *c);
1081 void pexpireCommand(redisClient *c);
1082 void pexpireatCommand(redisClient *c);
1083 void getsetCommand(redisClient *c);
1084 void ttlCommand(redisClient *c);
1085 void pttlCommand(redisClient *c);
1086 void persistCommand(redisClient *c);
1087 void slaveofCommand(redisClient *c);
1088 void debugCommand(redisClient *c);
1089 void msetCommand(redisClient *c);
1090 void msetnxCommand(redisClient *c);
1091 void zaddCommand(redisClient *c);
1092 void zincrbyCommand(redisClient *c);
1093 void zrangeCommand(redisClient *c);
1094 void zrangebyscoreCommand(redisClient *c);
1095 void zrevrangebyscoreCommand(redisClient *c);
1096 void zcountCommand(redisClient *c);
1097 void zrevrangeCommand(redisClient *c);
1098 void zcardCommand(redisClient *c);
1099 void zremCommand(redisClient *c);
1100 void zscoreCommand(redisClient *c);
1101 void zremrangebyscoreCommand(redisClient *c);
1102 void multiCommand(redisClient *c);
1103 void execCommand(redisClient *c);
1104 void discardCommand(redisClient *c);
1105 void blpopCommand(redisClient *c);
1106 void brpopCommand(redisClient *c);
1107 void brpoplpushCommand(redisClient *c);
1108 void appendCommand(redisClient *c);
1109 void strlenCommand(redisClient *c);
1110 void zrankCommand(redisClient *c);
1111 void zrevrankCommand(redisClient *c);
1112 void hsetCommand(redisClient *c);
1113 void hsetnxCommand(redisClient *c);
1114 void hgetCommand(redisClient *c);
1115 void hmsetCommand(redisClient *c);
1116 void hmgetCommand(redisClient *c);
1117 void hdelCommand(redisClient *c);
1118 void hlenCommand(redisClient *c);
1119 void zremrangebyrankCommand(redisClient *c);
1120 void zunionstoreCommand(redisClient *c);
1121 void zinterstoreCommand(redisClient *c);
1122 void hkeysCommand(redisClient *c);
1123 void hvalsCommand(redisClient *c);
1124 void hgetallCommand(redisClient *c);
1125 void hexistsCommand(redisClient *c);
1126 void configCommand(redisClient *c);
1127 void hincrbyCommand(redisClient *c);
1128 void hincrbyfloatCommand(redisClient *c);
1129 void subscribeCommand(redisClient *c);
1130 void unsubscribeCommand(redisClient *c);
1131 void psubscribeCommand(redisClient *c);
1132 void punsubscribeCommand(redisClient *c);
1133 void publishCommand(redisClient *c);
1134 void watchCommand(redisClient *c);
1135 void unwatchCommand(redisClient *c);
1136 void clusterCommand(redisClient *c);
1137 void restoreCommand(redisClient *c);
1138 void migrateCommand(redisClient *c);
1139 void askingCommand(redisClient *c);
1140 void dumpCommand(redisClient *c);
1141 void objectCommand(redisClient *c);
1142 void clientCommand(redisClient *c);
1143 void evalCommand(redisClient *c);
1144 void evalShaCommand(redisClient *c);
1145 void scriptCommand(redisClient *c);
1146
1147 #if defined(__GNUC__)
1148 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1149 void free(void *ptr) __attribute__ ((deprecated));
1150 void *malloc(size_t size) __attribute__ ((deprecated));
1151 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1152 #endif
1153
1154 /* Debugging stuff */
1155 void _redisAssertWithInfo(redisClient *c, robj *o, char *estr, char *file, int line);
1156 void _redisAssert(char *estr, char *file, int line);
1157 void _redisPanic(char *msg, char *file, int line);
1158 void bugReportStart(void);
1159
1160 #endif