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       (60*5)  /* default client timeout */
  43 #define REDIS_IOBUF_LEN         1024
  44 #define REDIS_LOADBUF_LEN       1024
  45 #define REDIS_DEFAULT_DBNUM     16
  46 #define REDIS_CONFIGLINE_MAX    1024
  47 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
  48 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  49 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  50 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
  51 #define REDIS_SHARED_INTEGERS 10000
  52 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
  53 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  54 #define REDIS_AUTO_AOFREWRITE_PERC  100
  55 #define REDIS_AUTO_AOFREWRITE_MIN_SIZE (1024*1024)
  56 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  57 #define REDIS_SLOWLOG_MAX_LEN 64
  58
  59 /* Hash table parameters */
  60 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  61
  62 /* Command flags:
  63  *   REDIS_CMD_DENYOOM:
  64  *     Commands marked with this flag will return an error when 'maxmemory' is
  65  *     set and the server is using more than 'maxmemory' bytes of memory.
  66  *     In short: commands with this flag are denied on low memory conditions.
  67  *   REDIS_CMD_FORCE_REPLICATION:
  68  *     Force replication even if dirty is 0. */
  69 #define REDIS_CMD_DENYOOM 4
  70 #define REDIS_CMD_FORCE_REPLICATION 8
  71
  72 /* Object types */
  73 #define REDIS_STRING 0
  74 #define REDIS_LIST 1
  75 #define REDIS_SET 2
  76 #define REDIS_ZSET 3
  77 #define REDIS_HASH 4
  78 #define REDIS_VMPOINTER 8
  79
  80 /* Object types only used for persistence in .rdb files */
  81 #define REDIS_HASH_ZIPMAP 9
  82 #define REDIS_LIST_ZIPLIST 10
  83 #define REDIS_SET_INTSET 11
  84 #define REDIS_ZSET_ZIPLIST 12
  85
  86 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  87  * internally represented in multiple ways. The 'encoding' field of the object
  88  * is set to one of this fields for this object. */
  89 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  90 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  91 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  92 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  93 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  94 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  95 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  96 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  97
  98 /* Object types only used for dumping to disk */
  99 #define REDIS_EXPIRETIME 253
 100 #define REDIS_SELECTDB 254
 101 #define REDIS_EOF 255
 102
 103 /* Defines related to the dump file format. To store 32 bits lengths for short
 104  * keys requires a lot of space, so we check the most significant 2 bits of
 105  * the first byte to interpreter the length:
 106  *
 107  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 108  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 109  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 110  * 11|000000 this means: specially encoded object will follow. The six bits
 111  *           number specify the kind of object that follows.
 112  *           See the REDIS_RDB_ENC_* defines.
 113  *
 114  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 115  * values, will fit inside. */
 116 #define REDIS_RDB_6BITLEN 0
 117 #define REDIS_RDB_14BITLEN 1
 118 #define REDIS_RDB_32BITLEN 2
 119 #define REDIS_RDB_ENCVAL 3
 120 #define REDIS_RDB_LENERR UINT_MAX
 121
 122 /* When a length of a string object stored on disk has the first two bits
 123  * set, the remaining two bits specify a special encoding for the object
 124  * accordingly to the following defines: */
 125 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 126 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 127 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 128 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 129
 130 /* Client flags */
 131 #define REDIS_SLAVE 1       /* This client is a slave server */
 132 #define REDIS_MASTER 2      /* This client is a master server */
 133 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 134 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 135 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 136 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 137 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 138 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 139                                server.unblocked_clients */
 140 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 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 APPENDFSYNC_NO 0
 190 #define APPENDFSYNC_ALWAYS 1
 191 #define APPENDFSYNC_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 60000 /* milliseconds */
 217
 218 /* We can print the stacktrace, so our assert is defined this way: */
 219 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 220 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 221 void _redisAssert(char *estr, char *file, int line);
 222 void _redisPanic(char *msg, char *file, int line);
 223
 224 /*-----------------------------------------------------------------------------
 225  * Data types
 226  *----------------------------------------------------------------------------*/
 227
 228 /* A redis object, that is a type able to hold a string / list / set */
 229
 230 /* The actual Redis Object */
 231 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 232 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 233 typedef struct redisObject {
 234     unsigned type:4;
 235     unsigned notused:2;     /* Not used */
 236     unsigned encoding:4;
 237     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 238     int refcount;
 239     void *ptr;
 240     /* VM fields are only allocated if VM is active, otherwise the
 241      * object allocation function will just allocate
 242      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 243      * Redis without VM active will not have any overhead. */
 244 } robj;
 245
 246 /* The VM pointer structure - identifies an object in the swap file.
 247  *
 248  * This object is stored in place of the value
 249  * object in the main key->value hash table representing a database.
 250  * Note that the first fields (type, storage) are the same as the redisObject
 251  * structure so that vmPointer strucuters can be accessed even when casted
 252  * as redisObject structures.
 253  *
 254  * This is useful as we don't know if a value object is or not on disk, but we
 255  * are always able to read obj->storage to check this. For vmPointer
 256  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 257  * is still possible to check the kind of object from the value of 'storage').*/
 258 typedef struct vmPointer {
 259     unsigned type:4;
 260     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 261     unsigned notused:26;
 262     unsigned int vtype; /* type of the object stored in the swap file */
 263     off_t page;         /* the page at witch the object is stored on disk */
 264     off_t usedpages;    /* number of pages used on disk */
 265 } vmpointer;
 266
 267 /* Macro used to initalize a Redis object allocated on the stack.
 268  * Note that this macro is taken near the structure definition to make sure
 269  * we'll update it when the structure is changed, to avoid bugs like
 270  * bug #85 introduced exactly in this way. */
 271 #define initStaticStringObject(_var,_ptr) do { \
 272     _var.refcount = 1; \
 273     _var.type = REDIS_STRING; \
 274     _var.encoding = REDIS_ENCODING_RAW; \
 275     _var.ptr = _ptr; \
 276 } while(0);
 277
 278 typedef struct redisDb {
 279     dict *dict;                 /* The keyspace for this DB */
 280     dict *expires;              /* Timeout of keys with a timeout set */
 281     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 282     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 283     int id;
 284 } redisDb;
 285
 286 /* Client MULTI/EXEC state */
 287 typedef struct multiCmd {
 288     robj **argv;
 289     int argc;
 290     struct redisCommand *cmd;
 291 } multiCmd;
 292
 293 typedef struct multiState {
 294     multiCmd *commands;     /* Array of MULTI commands */
 295     int count;              /* Total number of MULTI commands */
 296 } multiState;
 297
 298 typedef struct blockingState {
 299     robj **keys;            /* The key we are waiting to terminate a blocking
 300                              * operation such as BLPOP. Otherwise NULL. */
 301     int count;              /* Number of blocking keys */
 302     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 303                              * is >= timeout then the operation timed out. */
 304     robj *target;           /* The key that should receive the element,
 305                              * for BRPOPLPUSH. */
 306 } blockingState;
 307
 308 /* With multiplexing we need to take per-clinet state.
 309  * Clients are taken in a liked list. */
 310 typedef struct redisClient {
 311     int fd;
 312     redisDb *db;
 313     int dictid;
 314     sds querybuf;
 315     int argc;
 316     robj **argv;
 317     struct redisCommand *cmd;
 318     int reqtype;
 319     int multibulklen;       /* number of multi bulk arguments left to read */
 320     long bulklen;           /* length of bulk argument in multi bulk request */
 321     list *reply;
 322     int sentlen;
 323     time_t lastinteraction; /* time of the last interaction, used for timeout */
 324     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 325     int slaveseldb;         /* slave selected db, if this client is a slave */
 326     int authenticated;      /* when requirepass is non-NULL */
 327     int replstate;          /* replication state if this is a slave */
 328     int repldbfd;           /* replication DB file descriptor */
 329     long repldboff;         /* replication DB file offset */
 330     off_t repldbsize;       /* replication DB file size */
 331     multiState mstate;      /* MULTI/EXEC state */
 332     blockingState bpop;   /* blocking state */
 333     list *io_keys;          /* Keys this client is waiting to be loaded from the
 334                              * swap file in order to continue. */
 335     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 336     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 337     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 338
 339     /* Response buffer */
 340     int bufpos;
 341     char buf[REDIS_REPLY_CHUNK_BYTES];
 342 } redisClient;
 343
 344 struct saveparam {
 345     time_t seconds;
 346     int changes;
 347 };
 348
 349 struct sharedObjectsStruct {
 350     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 351     *colon, *nullbulk, *nullmultibulk, *queued,
 352     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 353     *outofrangeerr, *noscripterr, *loadingerr, *plus,
 354     *select0, *select1, *select2, *select3, *select4,
 355     *select5, *select6, *select7, *select8, *select9,
 356     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 357     *mbulk4, *psubscribebulk, *punsubscribebulk,
 358     *integers[REDIS_SHARED_INTEGERS];
 359 };
 360
 361 /* ZSETs use a specialized version of Skiplists */
 362 typedef struct zskiplistNode {
 363     robj *obj;
 364     double score;
 365     struct zskiplistNode *backward;
 366     struct zskiplistLevel {
 367         struct zskiplistNode *forward;
 368         unsigned int span;
 369     } level[];
 370 } zskiplistNode;
 371
 372 typedef struct zskiplist {
 373     struct zskiplistNode *header, *tail;
 374     unsigned long length;
 375     int level;
 376 } zskiplist;
 377
 378 typedef struct zset {
 379     dict *dict;
 380     zskiplist *zsl;
 381 } zset;
 382
 383 /*-----------------------------------------------------------------------------
 384  * Redis cluster data structures
 385  *----------------------------------------------------------------------------*/
 386
 387 #define REDIS_CLUSTER_SLOTS 4096
 388 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 389 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 390 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 391 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 392 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 393
 394 struct clusterNode;
 395
 396 /* clusterLink encapsulates everything needed to talk with a remote node. */
 397 typedef struct clusterLink {
 398     int fd;                     /* TCP socket file descriptor */
 399     sds sndbuf;                 /* Packet send buffer */
 400     sds rcvbuf;                 /* Packet reception buffer */
 401     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 402 } clusterLink;
 403
 404 /* Node flags */
 405 #define REDIS_NODE_MASTER 1     /* The node is a master */
 406 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 407 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 408 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 409 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 410 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 411 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 412 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 413 #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"
 414
 415 struct clusterNode {
 416     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 417     int flags;      /* REDIS_NODE_... */
 418     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 419     int numslaves;  /* Number of slave nodes, if this is a master */
 420     struct clusterNode **slaves; /* pointers to slave nodes */
 421     struct clusterNode *slaveof; /* pointer to the master node */
 422     time_t ping_sent;       /* Unix time we sent latest ping */
 423     time_t pong_received;   /* Unix time we received the pong */
 424     char *configdigest;         /* Configuration digest of this node */
 425     time_t configdigest_ts;     /* Configuration digest timestamp */
 426     char ip[16];                /* Latest known IP address of this node */
 427     int port;                   /* Latest known port of this node */
 428     clusterLink *link;          /* TCP/IP link with this node */
 429 };
 430 typedef struct clusterNode clusterNode;
 431
 432 typedef struct {
 433     char *configfile;
 434     clusterNode *myself;  /* This node */
 435     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 436     int node_timeout;
 437     dict *nodes;          /* Hash table of name -> clusterNode structures */
 438     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 439     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 440     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 441     zskiplist *slots_to_keys;
 442 } clusterState;
 443
 444 /* Redis cluster messages header */
 445
 446 /* Note that the PING, PONG and MEET messages are actually the same exact
 447  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 448  * while MEET is a special PING that forces the receiver to add the sender
 449  * as a node (if it is not already in the list). */
 450 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 451 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 452 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 453 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 454
 455 /* Initially we don't know our "name", but we'll find it once we connect
 456  * to the first node, using the getsockname() function. Then we'll use this
 457  * address for all the next messages. */
 458 typedef struct {
 459     char nodename[REDIS_CLUSTER_NAMELEN];
 460     uint32_t ping_sent;
 461     uint32_t pong_received;
 462     char ip[16];    /* IP address last time it was seen */
 463     uint16_t port;  /* port last time it was seen */
 464     uint16_t flags;
 465     uint32_t notused; /* for 64 bit alignment */
 466 } clusterMsgDataGossip;
 467
 468 typedef struct {
 469     char nodename[REDIS_CLUSTER_NAMELEN];
 470 } clusterMsgDataFail;
 471
 472 union clusterMsgData {
 473     /* PING, MEET and PONG */
 474     struct {
 475         /* Array of N clusterMsgDataGossip structures */
 476         clusterMsgDataGossip gossip[1];
 477     } ping;
 478     /* FAIL */
 479     struct {
 480         clusterMsgDataFail about;
 481     } fail;
 482 };
 483
 484 typedef struct {
 485     uint32_t totlen;    /* Total length of this message */
 486     uint16_t type;      /* Message type */
 487     uint16_t count;     /* Only used for some kind of messages. */
 488     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 489     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 490     char slaveof[REDIS_CLUSTER_NAMELEN];
 491     char configdigest[32];
 492     uint16_t port;      /* Sender TCP base port */
 493     unsigned char state; /* Cluster state from the POV of the sender */
 494     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 495     union clusterMsgData data;
 496 } clusterMsg;
 497
 498 /*-----------------------------------------------------------------------------
 499  * Global server state
 500  *----------------------------------------------------------------------------*/
 501
 502 struct redisServer {
 503     /* General */
 504     redisDb *db;
 505     dict *commands;             /* Command table hahs table */
 506     aeEventLoop *el;
 507     /* Networking */
 508     int port;
 509     char *bindaddr;
 510     char *unixsocket;
 511     int ipfd;
 512     int sofd;
 513     int cfd;
 514     list *clients;
 515     list *slaves, *monitors;
 516     char neterr[ANET_ERR_LEN];
 517     /* RDB / AOF loading information */
 518     int loading;
 519     off_t loading_total_bytes;
 520     off_t loading_loaded_bytes;
 521     time_t loading_start_time;
 522     /* Fast pointers to often looked up command */
 523     struct redisCommand *delCommand, *multiCommand;
 524     int cronloops;              /* number of times the cron function run */
 525     time_t lastsave;                /* Unix time of last save succeeede */
 526     /* Fields used only for stats */
 527     time_t stat_starttime;          /* server start time */
 528     long long stat_numcommands;     /* number of processed commands */
 529     long long stat_numconnections;  /* number of connections received */
 530     long long stat_expiredkeys;     /* number of expired keys */
 531     long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */
 532     long long stat_keyspace_hits;   /* number of successful lookups of keys */
 533     long long stat_keyspace_misses; /* number of failed lookups of keys */
 534     size_t stat_peak_memory;        /* max used memory record */
 535     long long stat_fork_time;       /* time needed to perform latets fork() */
 536     list *slowlog;
 537     long long slowlog_entry_id;
 538     long long slowlog_log_slower_than;
 539     unsigned long slowlog_max_len;
 540     /* Configuration */
 541     int verbosity;
 542     int maxidletime;
 543     int dbnum;
 544     int daemonize;
 545     int appendonly;
 546     int appendfsync;
 547     int no_appendfsync_on_rewrite;
 548     int auto_aofrewrite_perc;       /* Rewrite AOF if % growth is > M and... */
 549     off_t auto_aofrewrite_min_size; /* the AOF file is at least N bytes. */
 550     off_t auto_aofrewrite_base_size;/* AOF size on latest startup or rewrite. */
 551     off_t appendonly_current_size;  /* AOF current size. */
 552     int aofrewrite_scheduled;       /* Rewrite once BGSAVE terminates. */
 553     int shutdown_asap;
 554     int activerehashing;
 555     char *requirepass;
 556     /* Persistence */
 557     long long dirty;            /* changes to DB from the last save */
 558     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 559     time_t lastfsync;
 560     int appendfd;
 561     int appendseldb;
 562     char *pidfile;
 563     pid_t bgsavechildpid;
 564     pid_t bgrewritechildpid;
 565     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 566     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 567     struct saveparam *saveparams;
 568     int saveparamslen;
 569     char *dbfilename;
 570     int rdbcompression;
 571     char *appendfilename;
 572     /* Logging */
 573     char *logfile;
 574     int syslog_enabled;
 575     char *syslog_ident;
 576     int syslog_facility;
 577     /* Replication related */
 578     int isslave;
 579     /* Slave specific fields */
 580     char *masterauth;
 581     char *masterhost;
 582     int masterport;
 583     redisClient *master;    /* client that is master for this slave */
 584     int repl_syncio_timeout; /* timeout for synchronous I/O calls */
 585     int replstate;          /* replication status if the instance is a slave */
 586     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 587     int repl_transfer_s;    /* slave -> master SYNC socket */
 588     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 589     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 590     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 591     int repl_serve_stale_data; /* Serve stale data when link is down? */
 592     time_t repl_down_since; /* unix time at which link with master went down */
 593     /* Limits */
 594     unsigned int maxclients;
 595     unsigned long long maxmemory;
 596     int maxmemory_policy;
 597     int maxmemory_samples;
 598     /* Blocked clients */
 599     unsigned int bpop_blocked_clients;
 600     list *unblocked_clients; /* list of clients to unblock before next loop */
 601     /* Sort parameters - qsort_r() is only available under BSD so we
 602      * have to take this state global, in order to pass it to sortCompare() */
 603     int sort_desc;
 604     int sort_alpha;
 605     int sort_bypattern;
 606     /* Zip structure config */
 607     size_t hash_max_zipmap_entries;
 608     size_t hash_max_zipmap_value;
 609     size_t list_max_ziplist_entries;
 610     size_t list_max_ziplist_value;
 611     size_t set_max_intset_entries;
 612     size_t zset_max_ziplist_entries;
 613     size_t zset_max_ziplist_value;
 614     time_t unixtime;    /* Unix time sampled every second. */
 615     /* Virtual memory I/O threads stuff */
 616     /* An I/O thread process an element taken from the io_jobs queue and
 617      * put the result of the operation in the io_done list. While the
 618      * job is being processed, it's put on io_processing queue. */
 619     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 620     list *io_processing; /* List of VM I/O jobs being processed */
 621     list *io_processed; /* List of VM I/O jobs already processed */
 622     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 623     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 624     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 625     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 626     int io_active_threads; /* Number of running I/O threads */
 627     int vm_max_threads; /* Max number of I/O threads running at the same time */
 628     /* Our main thread is blocked on the event loop, locking for sockets ready
 629      * to be read or written, so when a threaded I/O operation is ready to be
 630      * processed by the main thread, the I/O thread will use a unix pipe to
 631      * awake the main thread. The followings are the two pipe FDs. */
 632     int io_ready_pipe_read;
 633     int io_ready_pipe_write;
 634     /* Virtual memory stats */
 635     unsigned long long vm_stats_used_pages;
 636     unsigned long long vm_stats_swapped_objects;
 637     unsigned long long vm_stats_swapouts;
 638     unsigned long long vm_stats_swapins;
 639     /* Pubsub */
 640     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 641     list *pubsub_patterns; /* A list of pubsub_patterns */
 642     /* Misc */
 643     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 644     unsigned lruclock_padding:10;
 645     /* Cluster */
 646     int cluster_enabled;
 647     clusterState cluster;
 648     /* Scripting */
 649     lua_State *lua; /* The Lua interpreter. We use just one for all clients */
 650     redisClient *lua_client; /* The "fake client" to query Redis from Lua */
 651     dict *lua_scripts; /* A dictionary of SHA1 -> Lua scripts */
 652     long long lua_time_limit;
 653     long long lua_time_start;
 654 };
 655
 656 typedef struct pubsubPattern {
 657     redisClient *client;
 658     robj *pattern;
 659 } pubsubPattern;
 660
 661 typedef void redisCommandProc(redisClient *c);
 662 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 663 struct redisCommand {
 664     char *name;
 665     redisCommandProc *proc;
 666     int arity;
 667     int flags;
 668     /* Use a function to determine keys arguments in a command line.
 669      * Used for Redis Cluster redirect. */
 670     redisGetKeysProc *getkeys_proc;
 671     /* What keys should be loaded in background when calling this command? */
 672     int firstkey; /* The first argument that's a key (0 = no keys) */
 673     int lastkey;  /* THe last argument that's a key */
 674     int keystep;  /* The step between first and last key */
 675     long long microseconds, calls;
 676 };
 677
 678 struct redisFunctionSym {
 679     char *name;
 680     unsigned long pointer;
 681 };
 682
 683 typedef struct _redisSortObject {
 684     robj *obj;
 685     union {
 686         double score;
 687         robj *cmpobj;
 688     } u;
 689 } redisSortObject;
 690
 691 typedef struct _redisSortOperation {
 692     int type;
 693     robj *pattern;
 694 } redisSortOperation;
 695
 696 /* Structure to hold list iteration abstraction. */
 697 typedef struct {
 698     robj *subject;
 699     unsigned char encoding;
 700     unsigned char direction; /* Iteration direction */
 701     unsigned char *zi;
 702     listNode *ln;
 703 } listTypeIterator;
 704
 705 /* Structure for an entry while iterating over a list. */
 706 typedef struct {
 707     listTypeIterator *li;
 708     unsigned char *zi;  /* Entry in ziplist */
 709     listNode *ln;       /* Entry in linked list */
 710 } listTypeEntry;
 711
 712 /* Structure to hold set iteration abstraction. */
 713 typedef struct {
 714     robj *subject;
 715     int encoding;
 716     int ii; /* intset iterator */
 717     dictIterator *di;
 718 } setTypeIterator;
 719
 720 /* Structure to hold hash iteration abstration. Note that iteration over
 721  * hashes involves both fields and values. Because it is possible that
 722  * not both are required, store pointers in the iterator to avoid
 723  * unnecessary memory allocation for fields/values. */
 724 typedef struct {
 725     int encoding;
 726     unsigned char *zi;
 727     unsigned char *zk, *zv;
 728     unsigned int zklen, zvlen;
 729
 730     dictIterator *di;
 731     dictEntry *de;
 732 } hashTypeIterator;
 733
 734 #define REDIS_HASH_KEY 1
 735 #define REDIS_HASH_VALUE 2
 736
 737 /*-----------------------------------------------------------------------------
 738  * Extern declarations
 739  *----------------------------------------------------------------------------*/
 740
 741 extern struct redisServer server;
 742 extern struct sharedObjectsStruct shared;
 743 extern dictType setDictType;
 744 extern dictType zsetDictType;
 745 extern dictType clusterNodesDictType;
 746 extern dictType dbDictType;
 747 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 748 dictType hashDictType;
 749
 750 /*-----------------------------------------------------------------------------
 751  * Functions prototypes
 752  *----------------------------------------------------------------------------*/
 753
 754 /* Utils */
 755 long long ustime(void);
 756
 757 /* networking.c -- Networking and Client related operations */
 758 redisClient *createClient(int fd);
 759 void closeTimedoutClients(void);
 760 void freeClient(redisClient *c);
 761 void resetClient(redisClient *c);
 762 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 763 void addReply(redisClient *c, robj *obj);
 764 void *addDeferredMultiBulkLength(redisClient *c);
 765 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 766 void addReplySds(redisClient *c, sds s);
 767 void processInputBuffer(redisClient *c);
 768 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 769 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 770 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 771 void addReplyBulk(redisClient *c, robj *obj);
 772 void addReplyBulkCString(redisClient *c, char *s);
 773 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 774 void addReplyBulkLongLong(redisClient *c, long long ll);
 775 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 776 void addReply(redisClient *c, robj *obj);
 777 void addReplySds(redisClient *c, sds s);
 778 void addReplyError(redisClient *c, char *err);
 779 void addReplyStatus(redisClient *c, char *status);
 780 void addReplyDouble(redisClient *c, double d);
 781 void addReplyLongLong(redisClient *c, long long ll);
 782 void addReplyMultiBulkLen(redisClient *c, long length);
 783 void *dupClientReplyValue(void *o);
 784 void getClientsMaxBuffers(unsigned long *longest_output_list,
 785                           unsigned long *biggest_input_buffer);
 786 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 787 void rewriteClientCommandArgument(redisClient *c, int i, robj *newval);
 788
 789 #ifdef __GNUC__
 790 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 791     __attribute__((format(printf, 2, 3)));
 792 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 793     __attribute__((format(printf, 2, 3)));
 794 #else
 795 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 796 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 797 #endif
 798
 799 /* List data type */
 800 void listTypeTryConversion(robj *subject, robj *value);
 801 void listTypePush(robj *subject, robj *value, int where);
 802 robj *listTypePop(robj *subject, int where);
 803 unsigned long listTypeLength(robj *subject);
 804 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 805 void listTypeReleaseIterator(listTypeIterator *li);
 806 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 807 robj *listTypeGet(listTypeEntry *entry);
 808 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 809 int listTypeEqual(listTypeEntry *entry, robj *o);
 810 void listTypeDelete(listTypeEntry *entry);
 811 void listTypeConvert(robj *subject, int enc);
 812 void unblockClientWaitingData(redisClient *c);
 813 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 814 void popGenericCommand(redisClient *c, int where);
 815
 816 /* MULTI/EXEC/WATCH... */
 817 void unwatchAllKeys(redisClient *c);
 818 void initClientMultiState(redisClient *c);
 819 void freeClientMultiState(redisClient *c);
 820 void queueMultiCommand(redisClient *c);
 821 void touchWatchedKey(redisDb *db, robj *key);
 822 void touchWatchedKeysOnFlush(int dbid);
 823
 824 /* Redis object implementation */
 825 void decrRefCount(void *o);
 826 void incrRefCount(robj *o);
 827 robj *resetRefCount(robj *obj);
 828 void freeStringObject(robj *o);
 829 void freeListObject(robj *o);
 830 void freeSetObject(robj *o);
 831 void freeZsetObject(robj *o);
 832 void freeHashObject(robj *o);
 833 robj *createObject(int type, void *ptr);
 834 robj *createStringObject(char *ptr, size_t len);
 835 robj *dupStringObject(robj *o);
 836 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 837 robj *tryObjectEncoding(robj *o);
 838 robj *getDecodedObject(robj *o);
 839 size_t stringObjectLen(robj *o);
 840 robj *createStringObjectFromLongLong(long long value);
 841 robj *createListObject(void);
 842 robj *createZiplistObject(void);
 843 robj *createSetObject(void);
 844 robj *createIntsetObject(void);
 845 robj *createHashObject(void);
 846 robj *createZsetObject(void);
 847 robj *createZsetZiplistObject(void);
 848 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 849 int checkType(redisClient *c, robj *o, int type);
 850 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 851 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 852 int getLongLongFromObject(robj *o, long long *target);
 853 char *strEncoding(int encoding);
 854 int compareStringObjects(robj *a, robj *b);
 855 int equalStringObjects(robj *a, robj *b);
 856 unsigned long estimateObjectIdleTime(robj *o);
 857
 858 /* Synchronous I/O with timeout */
 859 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 860 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 861 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 862 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 863 int fwriteBulkDouble(FILE *fp, double d);
 864 int fwriteBulkLongLong(FILE *fp, long long l);
 865 int fwriteBulkObject(FILE *fp, robj *obj);
 866 int fwriteBulkCount(FILE *fp, char prefix, int count);
 867
 868 /* Replication */
 869 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 870 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 871 void updateSlavesWaitingBgsave(int bgsaveerr);
 872 void replicationCron(void);
 873
 874 /* Generic persistence functions */
 875 void startLoading(FILE *fp);
 876 void loadingProgress(off_t pos);
 877 void stopLoading(void);
 878
 879 /* RDB persistence */
 880 int rdbLoad(char *filename);
 881 int rdbSaveBackground(char *filename);
 882 void rdbRemoveTempFile(pid_t childpid);
 883 int rdbSave(char *filename);
 884 int rdbSaveObject(FILE *fp, robj *o);
 885 off_t rdbSavedObjectLen(robj *o);
 886 off_t rdbSavedObjectPages(robj *o);
 887 robj *rdbLoadObject(int type, FILE *fp);
 888 void backgroundSaveDoneHandler(int exitcode, int bysignal);
 889 int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val, time_t expireitme, time_t now);
 890 int rdbLoadType(FILE *fp);
 891 time_t rdbLoadTime(FILE *fp);
 892 robj *rdbLoadStringObject(FILE *fp);
 893 int rdbSaveType(FILE *fp, unsigned char type);
 894 int rdbSaveLen(FILE *fp, uint32_t len);
 895
 896 /* AOF persistence */
 897 void flushAppendOnlyFile(void);
 898 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 899 void aofRemoveTempFile(pid_t childpid);
 900 int rewriteAppendOnlyFileBackground(void);
 901 int loadAppendOnlyFile(char *filename);
 902 void stopAppendOnly(void);
 903 int startAppendOnly(void);
 904 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 905
 906 /* Sorted sets data type */
 907
 908 /* Struct to hold a inclusive/exclusive range spec. */
 909 typedef struct {
 910     double min, max;
 911     int minex, maxex; /* are min or max exclusive? */
 912 } zrangespec;
 913
 914 zskiplist *zslCreate(void);
 915 void zslFree(zskiplist *zsl);
 916 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 917 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 918 int zslDelete(zskiplist *zsl, double score, robj *obj);
 919 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 920 double zzlGetScore(unsigned char *sptr);
 921 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 922 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 923 unsigned int zsetLength(robj *zobj);
 924 void zsetConvert(robj *zobj, int encoding);
 925
 926 /* Core functions */
 927 void freeMemoryIfNeeded(void);
 928 int processCommand(redisClient *c);
 929 void setupSignalHandlers(void);
 930 struct redisCommand *lookupCommand(sds name);
 931 struct redisCommand *lookupCommandByCString(char *s);
 932 void call(redisClient *c);
 933 int prepareForShutdown();
 934 void redisLog(int level, const char *fmt, ...);
 935 void redisLogRaw(int level, const char *msg);
 936 void usage();
 937 void updateDictResizePolicy(void);
 938 int htNeedsResize(dict *dict);
 939 void oom(const char *msg);
 940 void populateCommandTable(void);
 941 void resetCommandTableStats(void);
 942
 943 /* Set data type */
 944 robj *setTypeCreate(robj *value);
 945 int setTypeAdd(robj *subject, robj *value);
 946 int setTypeRemove(robj *subject, robj *value);
 947 int setTypeIsMember(robj *subject, robj *value);
 948 setTypeIterator *setTypeInitIterator(robj *subject);
 949 void setTypeReleaseIterator(setTypeIterator *si);
 950 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 951 robj *setTypeNextObject(setTypeIterator *si);
 952 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 953 unsigned long setTypeSize(robj *subject);
 954 void setTypeConvert(robj *subject, int enc);
 955
 956 /* Hash data type */
 957 void convertToRealHash(robj *o);
 958 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 959 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 960 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 961 robj *hashTypeGetObject(robj *o, robj *key);
 962 int hashTypeExists(robj *o, robj *key);
 963 int hashTypeSet(robj *o, robj *key, robj *value);
 964 int hashTypeDelete(robj *o, robj *key);
 965 unsigned long hashTypeLength(robj *o);
 966 hashTypeIterator *hashTypeInitIterator(robj *subject);
 967 void hashTypeReleaseIterator(hashTypeIterator *hi);
 968 int hashTypeNext(hashTypeIterator *hi);
 969 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 970 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 971 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 972
 973 /* Pub / Sub */
 974 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 975 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 976 void freePubsubPattern(void *p);
 977 int listMatchPubsubPattern(void *a, void *b);
 978
 979 /* Configuration */
 980 void loadServerConfig(char *filename);
 981 void appendServerSaveParams(time_t seconds, int changes);
 982 void resetServerSaveParams();
 983
 984 /* db.c -- Keyspace access API */
 985 int removeExpire(redisDb *db, robj *key);
 986 void propagateExpire(redisDb *db, robj *key);
 987 int expireIfNeeded(redisDb *db, robj *key);
 988 time_t getExpire(redisDb *db, robj *key);
 989 void setExpire(redisDb *db, robj *key, time_t when);
 990 robj *lookupKey(redisDb *db, robj *key);
 991 robj *lookupKeyRead(redisDb *db, robj *key);
 992 robj *lookupKeyWrite(redisDb *db, robj *key);
 993 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 994 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 995 void dbAdd(redisDb *db, robj *key, robj *val);
 996 void dbOverwrite(redisDb *db, robj *key, robj *val);
 997 void setKey(redisDb *db, robj *key, robj *val);
 998 int dbExists(redisDb *db, robj *key);
 999 robj *dbRandomKey(redisDb *db);
1000 int dbDelete(redisDb *db, robj *key);
1001 long long emptyDb();
1002 int selectDb(redisClient *c, int id);
1003 void signalModifiedKey(redisDb *db, robj *key);
1004 void signalFlushedDb(int dbid);
1005 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
1006
1007 /* API to get key arguments from commands */
1008 #define REDIS_GETKEYS_ALL 0
1009 #define REDIS_GETKEYS_PRELOAD 1
1010 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1011 void getKeysFreeResult(int *result);
1012 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1013 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1014 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1015
1016 /* Cluster */
1017 void clusterInit(void);
1018 unsigned short crc16(const char *buf, int len);
1019 unsigned int keyHashSlot(char *key, int keylen);
1020 clusterNode *createClusterNode(char *nodename, int flags);
1021 int clusterAddNode(clusterNode *node);
1022 void clusterCron(void);
1023 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1024
1025 /* Scripting */
1026 void scriptingInit(void);
1027
1028 /* Git SHA1 */
1029 char *redisGitSHA1(void);
1030 char *redisGitDirty(void);
1031
1032 /* Commands prototypes */
1033 void authCommand(redisClient *c);
1034 void pingCommand(redisClient *c);
1035 void echoCommand(redisClient *c);
1036 void setCommand(redisClient *c);
1037 void setnxCommand(redisClient *c);
1038 void setexCommand(redisClient *c);
1039 void getCommand(redisClient *c);
1040 void delCommand(redisClient *c);
1041 void existsCommand(redisClient *c);
1042 void setbitCommand(redisClient *c);
1043 void getbitCommand(redisClient *c);
1044 void setrangeCommand(redisClient *c);
1045 void getrangeCommand(redisClient *c);
1046 void incrCommand(redisClient *c);
1047 void decrCommand(redisClient *c);
1048 void incrbyCommand(redisClient *c);
1049 void decrbyCommand(redisClient *c);
1050 void selectCommand(redisClient *c);
1051 void randomkeyCommand(redisClient *c);
1052 void keysCommand(redisClient *c);
1053 void dbsizeCommand(redisClient *c);
1054 void lastsaveCommand(redisClient *c);
1055 void saveCommand(redisClient *c);
1056 void bgsaveCommand(redisClient *c);
1057 void bgrewriteaofCommand(redisClient *c);
1058 void shutdownCommand(redisClient *c);
1059 void moveCommand(redisClient *c);
1060 void renameCommand(redisClient *c);
1061 void renamenxCommand(redisClient *c);
1062 void lpushCommand(redisClient *c);
1063 void rpushCommand(redisClient *c);
1064 void lpushxCommand(redisClient *c);
1065 void rpushxCommand(redisClient *c);
1066 void linsertCommand(redisClient *c);
1067 void lpopCommand(redisClient *c);
1068 void rpopCommand(redisClient *c);
1069 void llenCommand(redisClient *c);
1070 void lindexCommand(redisClient *c);
1071 void lrangeCommand(redisClient *c);
1072 void ltrimCommand(redisClient *c);
1073 void typeCommand(redisClient *c);
1074 void lsetCommand(redisClient *c);
1075 void saddCommand(redisClient *c);
1076 void sremCommand(redisClient *c);
1077 void smoveCommand(redisClient *c);
1078 void sismemberCommand(redisClient *c);
1079 void scardCommand(redisClient *c);
1080 void spopCommand(redisClient *c);
1081 void srandmemberCommand(redisClient *c);
1082 void sinterCommand(redisClient *c);
1083 void sinterstoreCommand(redisClient *c);
1084 void sunionCommand(redisClient *c);
1085 void sunionstoreCommand(redisClient *c);
1086 void sdiffCommand(redisClient *c);
1087 void sdiffstoreCommand(redisClient *c);
1088 void syncCommand(redisClient *c);
1089 void flushdbCommand(redisClient *c);
1090 void flushallCommand(redisClient *c);
1091 void sortCommand(redisClient *c);
1092 void lremCommand(redisClient *c);
1093 void rpoplpushCommand(redisClient *c);
1094 void infoCommand(redisClient *c);
1095 void mgetCommand(redisClient *c);
1096 void monitorCommand(redisClient *c);
1097 void expireCommand(redisClient *c);
1098 void expireatCommand(redisClient *c);
1099 void getsetCommand(redisClient *c);
1100 void ttlCommand(redisClient *c);
1101 void persistCommand(redisClient *c);
1102 void slaveofCommand(redisClient *c);
1103 void debugCommand(redisClient *c);
1104 void msetCommand(redisClient *c);
1105 void msetnxCommand(redisClient *c);
1106 void zaddCommand(redisClient *c);
1107 void zincrbyCommand(redisClient *c);
1108 void zrangeCommand(redisClient *c);
1109 void zrangebyscoreCommand(redisClient *c);
1110 void zrevrangebyscoreCommand(redisClient *c);
1111 void zcountCommand(redisClient *c);
1112 void zrevrangeCommand(redisClient *c);
1113 void zcardCommand(redisClient *c);
1114 void zremCommand(redisClient *c);
1115 void zscoreCommand(redisClient *c);
1116 void zremrangebyscoreCommand(redisClient *c);
1117 void multiCommand(redisClient *c);
1118 void execCommand(redisClient *c);
1119 void discardCommand(redisClient *c);
1120 void blpopCommand(redisClient *c);
1121 void brpopCommand(redisClient *c);
1122 void brpoplpushCommand(redisClient *c);
1123 void appendCommand(redisClient *c);
1124 void strlenCommand(redisClient *c);
1125 void zrankCommand(redisClient *c);
1126 void zrevrankCommand(redisClient *c);
1127 void hsetCommand(redisClient *c);
1128 void hsetnxCommand(redisClient *c);
1129 void hgetCommand(redisClient *c);
1130 void hmsetCommand(redisClient *c);
1131 void hmgetCommand(redisClient *c);
1132 void hdelCommand(redisClient *c);
1133 void hlenCommand(redisClient *c);
1134 void zremrangebyrankCommand(redisClient *c);
1135 void zunionstoreCommand(redisClient *c);
1136 void zinterstoreCommand(redisClient *c);
1137 void hkeysCommand(redisClient *c);
1138 void hvalsCommand(redisClient *c);
1139 void hgetallCommand(redisClient *c);
1140 void hexistsCommand(redisClient *c);
1141 void configCommand(redisClient *c);
1142 void hincrbyCommand(redisClient *c);
1143 void subscribeCommand(redisClient *c);
1144 void unsubscribeCommand(redisClient *c);
1145 void psubscribeCommand(redisClient *c);
1146 void punsubscribeCommand(redisClient *c);
1147 void publishCommand(redisClient *c);
1148 void watchCommand(redisClient *c);
1149 void unwatchCommand(redisClient *c);
1150 void clusterCommand(redisClient *c);
1151 void restoreCommand(redisClient *c);
1152 void migrateCommand(redisClient *c);
1153 void dumpCommand(redisClient *c);
1154 void objectCommand(redisClient *c);
1155 void clientCommand(redisClient *c);
1156 void evalCommand(redisClient *c);
1157 void evalShaCommand(redisClient *c);
1158
1159 #if defined(__GNUC__)
1160 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1161 void free(void *ptr) __attribute__ ((deprecated));
1162 void *malloc(size_t size) __attribute__ ((deprecated));
1163 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1164 #endif
1165
1166 #endif