src/redis.h

   1 #ifndef __REDIS_H
   2 #define __REDIS_H
   3
   4 #include "fmacros.h"
   5 #include "config.h"
   6
   7 #if defined(__sun)
   8 #include "solarisfixes.h"
   9 #endif
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <limits.h>
  16 #include <unistd.h>
  17 #include <errno.h>
  18 #include <inttypes.h>
  19 #include <pthread.h>
  20 #include <syslog.h>
  21 #include <netinet/in.h>
  22
  23 #include "ae.h"     /* Event driven programming library */
  24 #include "sds.h"    /* Dynamic safe strings */
  25 #include "dict.h"   /* Hash tables */
  26 #include "adlist.h" /* Linked lists */
  27 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  28 #include "anet.h"   /* Networking the easy way */
  29 #include "zipmap.h" /* Compact string -> string data structure */
  30 #include "ziplist.h" /* Compact list data structure */
  31 #include "intset.h" /* Compact integer set structure */
  32 #include "version.h"
  33 #include "util.h"
  34
  35 /* Error codes */
  36 #define REDIS_OK                0
  37 #define REDIS_ERR               -1
  38
  39 /* Static server configuration */
  40 #define REDIS_SERVERPORT        6379    /* TCP port */
  41 #define REDIS_MAXIDLETIME       (60*5)  /* default client timeout */
  42 #define REDIS_IOBUF_LEN         1024
  43 #define REDIS_LOADBUF_LEN       1024
  44 #define REDIS_STATIC_ARGS       8
  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
  55 /* Hash table parameters */
  56 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  57
  58 /* Command flags:
  59  *   REDIS_CMD_DENYOOM:
  60  *     Commands marked with this flag will return an error when 'maxmemory' is
  61  *     set and the server is using more than 'maxmemory' bytes of memory.
  62  *     In short: commands with this flag are denied on low memory conditions.
  63  *   REDIS_CMD_FORCE_REPLICATION:
  64  *     Force replication even if dirty is 0. */
  65 #define REDIS_CMD_DENYOOM 4
  66 #define REDIS_CMD_FORCE_REPLICATION 8
  67
  68 /* Object types */
  69 #define REDIS_STRING 0
  70 #define REDIS_LIST 1
  71 #define REDIS_SET 2
  72 #define REDIS_ZSET 3
  73 #define REDIS_HASH 4
  74 #define REDIS_VMPOINTER 8
  75
  76 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  77  * internally represented in multiple ways. The 'encoding' field of the object
  78  * is set to one of this fields for this object. */
  79 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  80 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  81 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  82 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  83 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  84 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  85 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  86 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
  87
  88 /* Defines related to the dump file format. To store 32 bits lengths for short
  89  * keys requires a lot of space, so we check the most significant 2 bits of
  90  * the first byte to interpreter the length:
  91  *
  92  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
  93  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
  94  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
  95  * 11|000000 this means: specially encoded object will follow. The six bits
  96  *           number specify the kind of object that follows.
  97  *           See the REDIS_RDB_ENC_* defines.
  98  *
  99  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 100  * values, will fit inside. */
 101 #define REDIS_RDB_6BITLEN 0
 102 #define REDIS_RDB_14BITLEN 1
 103 #define REDIS_RDB_32BITLEN 2
 104 #define REDIS_RDB_ENCVAL 3
 105 #define REDIS_RDB_LENERR UINT_MAX
 106
 107 /* When a length of a string object stored on disk has the first two bits
 108  * set, the remaining two bits specify a special encoding for the object
 109  * accordingly to the following defines: */
 110 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 111 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 112 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 113 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 114
 115 /* Scheduled IO opeations flags. */
 116 #define REDIS_IO_LOAD 1
 117 #define REDIS_IO_SAVE 2
 118 #define REDIS_IO_LOADINPROG 4
 119 #define REDIS_IO_SAVEINPROG 8
 120
 121 /* Generic IO flags */
 122 #define REDIS_IO_ONLYLOADS 1
 123 #define REDIS_IO_ASAP 2
 124
 125 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1
 126 #define REDIS_THREAD_STACK_SIZE (1024*1024*4)
 127
 128 /* Client flags */
 129 #define REDIS_SLAVE 1       /* This client is a slave server */
 130 #define REDIS_MASTER 2      /* This client is a master server */
 131 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 132 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 133 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 134 #define REDIS_IO_WAIT 32    /* The client is waiting for Virtual Memory I/O */
 135 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 136 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 137 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 138                                server.unblocked_clients */
 139
 140 /* Client request types */
 141 #define REDIS_REQ_INLINE 1
 142 #define REDIS_REQ_MULTIBULK 2
 143
 144 /* Slave replication state - slave side */
 145 #define REDIS_REPL_NONE 0   /* No active replication */
 146 #define REDIS_REPL_CONNECT 1    /* Must connect to master */
 147 #define REDIS_REPL_TRANSFER 2    /* Receiving .rdb from master */
 148 #define REDIS_REPL_CONNECTED 3  /* Connected to master */
 149
 150 /* Slave replication state - from the point of view of master
 151  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 152  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 153  * to start the next background saving in order to send updates to it. */
 154 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 155 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 156 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 157 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 158
 159 /* List related stuff */
 160 #define REDIS_HEAD 0
 161 #define REDIS_TAIL 1
 162
 163 /* Sort operations */
 164 #define REDIS_SORT_GET 0
 165 #define REDIS_SORT_ASC 1
 166 #define REDIS_SORT_DESC 2
 167 #define REDIS_SORTKEY_MAX 1024
 168
 169 /* Log levels */
 170 #define REDIS_DEBUG 0
 171 #define REDIS_VERBOSE 1
 172 #define REDIS_NOTICE 2
 173 #define REDIS_WARNING 3
 174 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 175
 176 /* Anti-warning macro... */
 177 #define REDIS_NOTUSED(V) ((void) V)
 178
 179 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 180 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 181
 182 /* Append only defines */
 183 #define APPENDFSYNC_NO 0
 184 #define APPENDFSYNC_ALWAYS 1
 185 #define APPENDFSYNC_EVERYSEC 2
 186
 187 /* Zip structure related defaults */
 188 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 189 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 190 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 191 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 192 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 193 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 194 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 195
 196 /* Sets operations codes */
 197 #define REDIS_OP_UNION 0
 198 #define REDIS_OP_DIFF 1
 199 #define REDIS_OP_INTER 2
 200
 201 /* Redis maxmemory strategies */
 202 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 203 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 204 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 205 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 206 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 207 #define REDIS_MAXMEMORY_NO_EVICTION 5
 208
 209 /* Diskstore background saving thread states */
 210 #define REDIS_BGSAVE_THREAD_UNACTIVE 0
 211 #define REDIS_BGSAVE_THREAD_ACTIVE 1
 212 #define REDIS_BGSAVE_THREAD_DONE_OK 2
 213 #define REDIS_BGSAVE_THREAD_DONE_ERR 3
 214
 215 /* We can print the stacktrace, so our assert is defined this way: */
 216 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 217 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 218 void _redisAssert(char *estr, char *file, int line);
 219 void _redisPanic(char *msg, char *file, int line);
 220
 221 /*-----------------------------------------------------------------------------
 222  * Data types
 223  *----------------------------------------------------------------------------*/
 224
 225 /* A redis object, that is a type able to hold a string / list / set */
 226
 227 /* The actual Redis Object */
 228 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 229 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 230 typedef struct redisObject {
 231     unsigned type:4;
 232     unsigned notused:2;     /* Not used */
 233     unsigned encoding:4;
 234     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 235     int refcount;
 236     void *ptr;
 237     /* VM fields are only allocated if VM is active, otherwise the
 238      * object allocation function will just allocate
 239      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 240      * Redis without VM active will not have any overhead. */
 241 } robj;
 242
 243 /* The VM pointer structure - identifies an object in the swap file.
 244  *
 245  * This object is stored in place of the value
 246  * object in the main key->value hash table representing a database.
 247  * Note that the first fields (type, storage) are the same as the redisObject
 248  * structure so that vmPointer strucuters can be accessed even when casted
 249  * as redisObject structures.
 250  *
 251  * This is useful as we don't know if a value object is or not on disk, but we
 252  * are always able to read obj->storage to check this. For vmPointer
 253  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 254  * is still possible to check the kind of object from the value of 'storage').*/
 255 typedef struct vmPointer {
 256     unsigned type:4;
 257     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 258     unsigned notused:26;
 259     unsigned int vtype; /* type of the object stored in the swap file */
 260     off_t page;         /* the page at witch the object is stored on disk */
 261     off_t usedpages;    /* number of pages used on disk */
 262 } vmpointer;
 263
 264 /* Macro used to initalize a Redis object allocated on the stack.
 265  * Note that this macro is taken near the structure definition to make sure
 266  * we'll update it when the structure is changed, to avoid bugs like
 267  * bug #85 introduced exactly in this way. */
 268 #define initStaticStringObject(_var,_ptr) do { \
 269     _var.refcount = 1; \
 270     _var.type = REDIS_STRING; \
 271     _var.encoding = REDIS_ENCODING_RAW; \
 272     _var.ptr = _ptr; \
 273 } while(0);
 274
 275 typedef struct redisDb {
 276     dict *dict;                 /* The keyspace for this DB */
 277     dict *expires;              /* Timeout of keys with a timeout set */
 278     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 279     dict *io_keys;              /* Keys with clients waiting for DS I/O */
 280     dict *io_negcache;          /* Negative caching for disk store */
 281     dict *io_queued;            /* Queued IO operations hash table */
 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     int reqtype;
 318     int multibulklen;       /* number of multi bulk arguments left to read */
 319     long bulklen;           /* length of bulk argument in multi bulk request */
 320     list *reply;
 321     int sentlen;
 322     time_t lastinteraction; /* time of the last interaction, used for timeout */
 323     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 324     int slaveseldb;         /* slave selected db, if this client is a slave */
 325     int authenticated;      /* when requirepass is non-NULL */
 326     int replstate;          /* replication state if this is a slave */
 327     int repldbfd;           /* replication DB file descriptor */
 328     long repldboff;         /* replication DB file offset */
 329     off_t repldbsize;       /* replication DB file size */
 330     multiState mstate;      /* MULTI/EXEC state */
 331     blockingState bpop;   /* blocking state */
 332     list *io_keys;          /* Keys this client is waiting to be loaded from the
 333                              * swap file in order to continue. */
 334     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 335     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 336     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 337
 338     /* Response buffer */
 339     int bufpos;
 340     char buf[REDIS_REPLY_CHUNK_BYTES];
 341 } redisClient;
 342
 343 struct saveparam {
 344     time_t seconds;
 345     int changes;
 346 };
 347
 348 struct sharedObjectsStruct {
 349     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 350     *colon, *nullbulk, *nullmultibulk, *queued,
 351     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 352     *outofrangeerr, *loadingerr, *plus,
 353     *select0, *select1, *select2, *select3, *select4,
 354     *select5, *select6, *select7, *select8, *select9,
 355     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 356     *mbulk4, *psubscribebulk, *punsubscribebulk,
 357     *integers[REDIS_SHARED_INTEGERS];
 358 };
 359
 360 /* ZSETs use a specialized version of Skiplists */
 361 typedef struct zskiplistNode {
 362     robj *obj;
 363     double score;
 364     struct zskiplistNode *backward;
 365     struct zskiplistLevel {
 366         struct zskiplistNode *forward;
 367         unsigned int span;
 368     } level[];
 369 } zskiplistNode;
 370
 371 typedef struct zskiplist {
 372     struct zskiplistNode *header, *tail;
 373     unsigned long length;
 374     int level;
 375 } zskiplist;
 376
 377 typedef struct zset {
 378     dict *dict;
 379     zskiplist *zsl;
 380 } zset;
 381
 382 /*-----------------------------------------------------------------------------
 383  * Redis cluster data structures
 384  *----------------------------------------------------------------------------*/
 385
 386 #define REDIS_CLUSTER_SLOTS 4096
 387 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 388 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 389 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 390 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 391 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 392
 393 struct clusterNode;
 394
 395 /* clusterLink encapsulates everything needed to talk with a remote node. */
 396 typedef struct clusterLink {
 397     int fd;                     /* TCP socket file descriptor */
 398     sds sndbuf;                 /* Packet send buffer */
 399     sds rcvbuf;                 /* Packet reception buffer */
 400     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 401 } clusterLink;
 402
 403 /* Node flags */
 404 #define REDIS_NODE_MASTER 1     /* The node is a master */
 405 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 406 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 407 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 408 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 409 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 410 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 411 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 412 #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"
 413
 414 struct clusterNode {
 415     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 416     int flags;      /* REDIS_NODE_... */
 417     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 418     int numslaves;  /* Number of slave nodes, if this is a master */
 419     struct clusterNode **slaves; /* pointers to slave nodes */
 420     struct clusterNode *slaveof; /* pointer to the master node */
 421     time_t ping_sent;       /* Unix time we sent latest ping */
 422     time_t pong_received;   /* Unix time we received the pong */
 423     char *configdigest;         /* Configuration digest of this node */
 424     time_t configdigest_ts;     /* Configuration digest timestamp */
 425     char ip[16];                /* Latest known IP address of this node */
 426     int port;                   /* Latest known port of this node */
 427     clusterLink *link;          /* TCP/IP link with this node */
 428 };
 429 typedef struct clusterNode clusterNode;
 430
 431 typedef struct {
 432     char *configfile;
 433     clusterNode *myself;  /* This node */
 434     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 435     int node_timeout;
 436     dict *nodes;          /* Hash table of name -> clusterNode structures */
 437     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 438     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 439     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 440     zskiplist *slots_to_keys;
 441 } clusterState;
 442
 443 /* Redis cluster messages header */
 444
 445 /* Note that the PING, PONG and MEET messages are actually the same exact
 446  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 447  * while MEET is a special PING that forces the receiver to add the sender
 448  * as a node (if it is not already in the list). */
 449 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 450 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 451 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 452 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 453
 454 /* Initially we don't know our "name", but we'll find it once we connect
 455  * to the first node, using the getsockname() function. Then we'll use this
 456  * address for all the next messages. */
 457 typedef struct {
 458     char nodename[REDIS_CLUSTER_NAMELEN];
 459     uint32_t ping_sent;
 460     uint32_t pong_received;
 461     char ip[16];    /* IP address last time it was seen */
 462     uint16_t port;  /* port last time it was seen */
 463     uint16_t flags;
 464     uint32_t notused; /* for 64 bit alignment */
 465 } clusterMsgDataGossip;
 466
 467 typedef struct {
 468     char nodename[REDIS_CLUSTER_NAMELEN];
 469 } clusterMsgDataFail;
 470
 471 union clusterMsgData {
 472     /* PING, MEET and PONG */
 473     struct {
 474         /* Array of N clusterMsgDataGossip structures */
 475         clusterMsgDataGossip gossip[1];
 476     } ping;
 477     /* FAIL */
 478     struct {
 479         clusterMsgDataFail about;
 480     } fail;
 481 };
 482
 483 typedef struct {
 484     uint32_t totlen;    /* Total length of this message */
 485     uint16_t type;      /* Message type */
 486     uint16_t count;     /* Only used for some kind of messages. */
 487     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 488     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 489     char slaveof[REDIS_CLUSTER_NAMELEN];
 490     char configdigest[32];
 491     uint16_t port;      /* Sender TCP base port */
 492     unsigned char state; /* Cluster state from the POV of the sender */
 493     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 494     union clusterMsgData data;
 495 } clusterMsg;
 496
 497 /*-----------------------------------------------------------------------------
 498  * Global server state
 499  *----------------------------------------------------------------------------*/
 500
 501 struct redisServer {
 502     /* General */
 503     pthread_t mainthread;
 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     /* Configuration */
 536     int verbosity;
 537     int maxidletime;
 538     int dbnum;
 539     int daemonize;
 540     int appendonly;
 541     int appendfsync;
 542     int no_appendfsync_on_rewrite;
 543     int shutdown_asap;
 544     int activerehashing;
 545     char *requirepass;
 546     /* Persistence */
 547     long long dirty;            /* changes to DB from the last save */
 548     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 549     time_t lastfsync;
 550     int appendfd;
 551     int appendseldb;
 552     char *pidfile;
 553     pid_t bgsavechildpid;
 554     pid_t bgrewritechildpid;
 555     int bgsavethread_state;
 556     pthread_mutex_t bgsavethread_mutex;
 557     pthread_t bgsavethread;
 558     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 559     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 560     struct saveparam *saveparams;
 561     int saveparamslen;
 562     char *dbfilename;
 563     int rdbcompression;
 564     char *appendfilename;
 565     /* Logging */
 566     char *logfile;
 567     int syslog_enabled;
 568     char *syslog_ident;
 569     int syslog_facility;
 570     /* Replication related */
 571     int isslave;
 572     /* Slave specific fields */
 573     char *masterauth;
 574     char *masterhost;
 575     int masterport;
 576     redisClient *master;    /* client that is master for this slave */
 577     int replstate;          /* replication status if the instance is a slave */
 578     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 579     int repl_transfer_s;    /* slave -> master SYNC socket */
 580     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 581     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 582     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 583     int repl_serve_stale_data; /* Serve stale data when link is down? */
 584     /* Limits */
 585     unsigned int maxclients;
 586     unsigned long long maxmemory;
 587     int maxmemory_policy;
 588     int maxmemory_samples;
 589     /* Blocked clients */
 590     unsigned int bpop_blocked_clients;
 591     unsigned int cache_blocked_clients;
 592     list *unblocked_clients; /* list of clients to unblock before next loop */
 593     list *cache_io_queue;    /* IO operations queue */
 594     int cache_flush_delay;   /* seconds to wait before flushing keys */
 595     /* Sort parameters - qsort_r() is only available under BSD so we
 596      * have to take this state global, in order to pass it to sortCompare() */
 597     int sort_desc;
 598     int sort_alpha;
 599     int sort_bypattern;
 600     /* Virtual memory configuration */
 601     int ds_enabled; /* backend disk in redis.conf */
 602     char *ds_path;  /* location of the disk store on disk */
 603     unsigned long long cache_max_memory;
 604     /* Zip structure config */
 605     size_t hash_max_zipmap_entries;
 606     size_t hash_max_zipmap_value;
 607     size_t list_max_ziplist_entries;
 608     size_t list_max_ziplist_value;
 609     size_t set_max_intset_entries;
 610     size_t zset_max_ziplist_entries;
 611     size_t zset_max_ziplist_value;
 612     time_t unixtime;    /* Unix time sampled every second. */
 613     /* Virtual memory I/O threads stuff */
 614     /* An I/O thread process an element taken from the io_jobs queue and
 615      * put the result of the operation in the io_done list. While the
 616      * job is being processed, it's put on io_processing queue. */
 617     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 618     list *io_processing; /* List of VM I/O jobs being processed */
 619     list *io_processed; /* List of VM I/O jobs already processed */
 620     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 621     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 622     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 623     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 624     int io_active_threads; /* Number of running I/O threads */
 625     int vm_max_threads; /* Max number of I/O threads running at the same time */
 626     /* Our main thread is blocked on the event loop, locking for sockets ready
 627      * to be read or written, so when a threaded I/O operation is ready to be
 628      * processed by the main thread, the I/O thread will use a unix pipe to
 629      * awake the main thread. The followings are the two pipe FDs. */
 630     int io_ready_pipe_read;
 631     int io_ready_pipe_write;
 632     /* Virtual memory stats */
 633     unsigned long long vm_stats_used_pages;
 634     unsigned long long vm_stats_swapped_objects;
 635     unsigned long long vm_stats_swapouts;
 636     unsigned long long vm_stats_swapins;
 637     /* Pubsub */
 638     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 639     list *pubsub_patterns; /* A list of pubsub_patterns */
 640     /* Misc */
 641     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 642     unsigned lruclock_padding:10;
 643     /* Cluster */
 644     int cluster_enabled;
 645     clusterState cluster;
 646 };
 647
 648 typedef struct pubsubPattern {
 649     redisClient *client;
 650     robj *pattern;
 651 } pubsubPattern;
 652
 653 typedef void redisCommandProc(redisClient *c);
 654 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 655 struct redisCommand {
 656     char *name;
 657     redisCommandProc *proc;
 658     int arity;
 659     int flags;
 660     /* Use a function to determine keys arguments in a command line.
 661      * Used both for diskstore preloading and Redis Cluster. */
 662     redisGetKeysProc *getkeys_proc;
 663     /* What keys should be loaded in background when calling this command? */
 664     int firstkey; /* The first argument that's a key (0 = no keys) */
 665     int lastkey;  /* THe last argument that's a key */
 666     int keystep;  /* The step between first and last key */
 667     long long microseconds, calls;
 668 };
 669
 670 struct redisFunctionSym {
 671     char *name;
 672     unsigned long pointer;
 673 };
 674
 675 typedef struct _redisSortObject {
 676     robj *obj;
 677     union {
 678         double score;
 679         robj *cmpobj;
 680     } u;
 681 } redisSortObject;
 682
 683 typedef struct _redisSortOperation {
 684     int type;
 685     robj *pattern;
 686 } redisSortOperation;
 687
 688 /* DIsk store threaded I/O request message */
 689 #define REDIS_IOJOB_LOAD 0
 690 #define REDIS_IOJOB_SAVE 1
 691
 692 typedef struct iojob {
 693     int type;   /* Request type, REDIS_IOJOB_* */
 694     redisDb *db;/* Redis database */
 695     robj *key;  /* This I/O request is about this key */
 696     robj *val;  /* the value to swap for REDIS_IOJOB_SAVE, otherwise this
 697                  * field is populated by the I/O thread for REDIS_IOJOB_LOAD. */
 698     time_t expire; /* Expire time for this key on REDIS_IOJOB_LOAD */
 699 } iojob;
 700
 701 /* IO operations scheduled -- check dscache.c for more info */
 702 typedef struct ioop {
 703     int type;
 704     redisDb *db;
 705     robj *key;
 706     time_t ctime; /* This is the creation time of the entry. */
 707 } ioop;
 708
 709 /* Structure to hold list iteration abstraction. */
 710 typedef struct {
 711     robj *subject;
 712     unsigned char encoding;
 713     unsigned char direction; /* Iteration direction */
 714     unsigned char *zi;
 715     listNode *ln;
 716 } listTypeIterator;
 717
 718 /* Structure for an entry while iterating over a list. */
 719 typedef struct {
 720     listTypeIterator *li;
 721     unsigned char *zi;  /* Entry in ziplist */
 722     listNode *ln;       /* Entry in linked list */
 723 } listTypeEntry;
 724
 725 /* Structure to hold set iteration abstraction. */
 726 typedef struct {
 727     robj *subject;
 728     int encoding;
 729     int ii; /* intset iterator */
 730     dictIterator *di;
 731 } setTypeIterator;
 732
 733 /* Structure to hold hash iteration abstration. Note that iteration over
 734  * hashes involves both fields and values. Because it is possible that
 735  * not both are required, store pointers in the iterator to avoid
 736  * unnecessary memory allocation for fields/values. */
 737 typedef struct {
 738     int encoding;
 739     unsigned char *zi;
 740     unsigned char *zk, *zv;
 741     unsigned int zklen, zvlen;
 742
 743     dictIterator *di;
 744     dictEntry *de;
 745 } hashTypeIterator;
 746
 747 #define REDIS_HASH_KEY 1
 748 #define REDIS_HASH_VALUE 2
 749
 750 /*-----------------------------------------------------------------------------
 751  * Extern declarations
 752  *----------------------------------------------------------------------------*/
 753
 754 extern struct redisServer server;
 755 extern struct sharedObjectsStruct shared;
 756 extern dictType setDictType;
 757 extern dictType zsetDictType;
 758 extern dictType clusterNodesDictType;
 759 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 760 dictType hashDictType;
 761
 762 /*-----------------------------------------------------------------------------
 763  * Functions prototypes
 764  *----------------------------------------------------------------------------*/
 765
 766 /* Utils */
 767 long long ustime(void);
 768
 769 /* networking.c -- Networking and Client related operations */
 770 redisClient *createClient(int fd);
 771 void closeTimedoutClients(void);
 772 void freeClient(redisClient *c);
 773 void resetClient(redisClient *c);
 774 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 775 void addReply(redisClient *c, robj *obj);
 776 void *addDeferredMultiBulkLength(redisClient *c);
 777 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 778 void addReplySds(redisClient *c, sds s);
 779 void processInputBuffer(redisClient *c);
 780 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 781 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 782 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 783 void addReplyBulk(redisClient *c, robj *obj);
 784 void addReplyBulkCString(redisClient *c, char *s);
 785 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 786 void addReplyBulkLongLong(redisClient *c, long long ll);
 787 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 788 void addReply(redisClient *c, robj *obj);
 789 void addReplySds(redisClient *c, sds s);
 790 void addReplyError(redisClient *c, char *err);
 791 void addReplyStatus(redisClient *c, char *status);
 792 void addReplyDouble(redisClient *c, double d);
 793 void addReplyLongLong(redisClient *c, long long ll);
 794 void addReplyMultiBulkLen(redisClient *c, long length);
 795 void *dupClientReplyValue(void *o);
 796 void getClientsMaxBuffers(unsigned long *longest_output_list,
 797                           unsigned long *biggest_input_buffer);
 798
 799 #ifdef __GNUC__
 800 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 801     __attribute__((format(printf, 2, 3)));
 802 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 803     __attribute__((format(printf, 2, 3)));
 804 #else
 805 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 806 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 807 #endif
 808
 809 /* List data type */
 810 void listTypeTryConversion(robj *subject, robj *value);
 811 void listTypePush(robj *subject, robj *value, int where);
 812 robj *listTypePop(robj *subject, int where);
 813 unsigned long listTypeLength(robj *subject);
 814 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 815 void listTypeReleaseIterator(listTypeIterator *li);
 816 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 817 robj *listTypeGet(listTypeEntry *entry);
 818 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 819 int listTypeEqual(listTypeEntry *entry, robj *o);
 820 void listTypeDelete(listTypeEntry *entry);
 821 void listTypeConvert(robj *subject, int enc);
 822 void unblockClientWaitingData(redisClient *c);
 823 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 824 void popGenericCommand(redisClient *c, int where);
 825
 826 /* MULTI/EXEC/WATCH... */
 827 void unwatchAllKeys(redisClient *c);
 828 void initClientMultiState(redisClient *c);
 829 void freeClientMultiState(redisClient *c);
 830 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
 831 void touchWatchedKey(redisDb *db, robj *key);
 832 void touchWatchedKeysOnFlush(int dbid);
 833
 834 /* Redis object implementation */
 835 void decrRefCount(void *o);
 836 void incrRefCount(robj *o);
 837 void freeStringObject(robj *o);
 838 void freeListObject(robj *o);
 839 void freeSetObject(robj *o);
 840 void freeZsetObject(robj *o);
 841 void freeHashObject(robj *o);
 842 robj *createObject(int type, void *ptr);
 843 robj *createStringObject(char *ptr, size_t len);
 844 robj *dupStringObject(robj *o);
 845 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 846 robj *tryObjectEncoding(robj *o);
 847 robj *getDecodedObject(robj *o);
 848 size_t stringObjectLen(robj *o);
 849 robj *createStringObjectFromLongLong(long long value);
 850 robj *createListObject(void);
 851 robj *createZiplistObject(void);
 852 robj *createSetObject(void);
 853 robj *createIntsetObject(void);
 854 robj *createHashObject(void);
 855 robj *createZsetObject(void);
 856 robj *createZsetZiplistObject(void);
 857 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 858 int checkType(redisClient *c, robj *o, int type);
 859 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 860 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 861 int getLongLongFromObject(robj *o, long long *target);
 862 char *strEncoding(int encoding);
 863 int compareStringObjects(robj *a, robj *b);
 864 int equalStringObjects(robj *a, robj *b);
 865 unsigned long estimateObjectIdleTime(robj *o);
 866
 867 /* Synchronous I/O with timeout */
 868 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 869 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 870 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 871 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 872 int fwriteBulkDouble(FILE *fp, double d);
 873 int fwriteBulkLongLong(FILE *fp, long long l);
 874 int fwriteBulkObject(FILE *fp, robj *obj);
 875 int fwriteBulkCount(FILE *fp, char prefix, int count);
 876
 877 /* Replication */
 878 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 879 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 880 int syncWithMaster(void);
 881 void updateSlavesWaitingBgsave(int bgsaveerr);
 882 void replicationCron(void);
 883
 884 /* Generic persistence functions */
 885 void startLoading(FILE *fp);
 886 void loadingProgress(off_t pos);
 887 void stopLoading(void);
 888
 889 /* RDB persistence */
 890 #include "rdb.h"
 891
 892 /* AOF persistence */
 893 void flushAppendOnlyFile(void);
 894 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 895 void aofRemoveTempFile(pid_t childpid);
 896 int rewriteAppendOnlyFileBackground(void);
 897 int loadAppendOnlyFile(char *filename);
 898 void stopAppendOnly(void);
 899 int startAppendOnly(void);
 900 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 901
 902 /* Sorted sets data type */
 903
 904 /* Struct to hold a inclusive/exclusive range spec. */
 905 typedef struct {
 906     double min, max;
 907     int minex, maxex; /* are min or max exclusive? */
 908 } zrangespec;
 909
 910 zskiplist *zslCreate(void);
 911 void zslFree(zskiplist *zsl);
 912 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 913 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 914 int zslDelete(zskiplist *zsl, double score, robj *obj);
 915 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 916 double zzlGetScore(unsigned char *sptr);
 917 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 918 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 919 unsigned int zsetLength(robj *zobj);
 920 void zsetConvert(robj *zobj, int encoding);
 921
 922 /* Core functions */
 923 void freeMemoryIfNeeded(void);
 924 int processCommand(redisClient *c);
 925 void setupSignalHandlers(void);
 926 struct redisCommand *lookupCommand(sds name);
 927 struct redisCommand *lookupCommandByCString(char *s);
 928 void call(redisClient *c, struct redisCommand *cmd);
 929 int prepareForShutdown();
 930 void redisLog(int level, const char *fmt, ...);
 931 void usage();
 932 void updateDictResizePolicy(void);
 933 int htNeedsResize(dict *dict);
 934 void oom(const char *msg);
 935 void populateCommandTable(void);
 936 void resetCommandTableStats(void);
 937
 938 /* Disk store */
 939 int dsOpen(void);
 940 int dsClose(void);
 941 int dsSet(redisDb *db, robj *key, robj *val, time_t expire);
 942 robj *dsGet(redisDb *db, robj *key, time_t *expire);
 943 int dsDel(redisDb *db, robj *key);
 944 int dsExists(redisDb *db, robj *key);
 945 void dsFlushDb(int dbid);
 946 int dsRdbSaveBackground(char *filename);
 947 int dsRdbSave(char *filename);
 948
 949 /* Disk Store Cache */
 950 void dsInit(void);
 951 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);
 952 void lockThreadedIO(void);
 953 void unlockThreadedIO(void);
 954 void freeIOJob(iojob *j);
 955 void queueIOJob(iojob *j);
 956 void waitEmptyIOJobsQueue(void);
 957 void processAllPendingIOJobs(void);
 958 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
 959 int dontWaitForSwappedKey(redisClient *c, robj *key);
 960 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
 961 int cacheFreeOneEntry(void);
 962 void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag);
 963 void cacheScheduleIODelFlag(redisDb *db, robj *key, long flag);
 964 int cacheScheduleIOGetFlags(redisDb *db, robj *key);
 965 void cacheScheduleIO(redisDb *db, robj *key, int type);
 966 void cacheCron(void);
 967 int cacheKeyMayExist(redisDb *db, robj *key);
 968 void cacheSetKeyMayExist(redisDb *db, robj *key);
 969 void cacheSetKeyDoesNotExist(redisDb *db, robj *key);
 970 void cacheForcePointInTime(void);
 971
 972 /* Set data type */
 973 robj *setTypeCreate(robj *value);
 974 int setTypeAdd(robj *subject, robj *value);
 975 int setTypeRemove(robj *subject, robj *value);
 976 int setTypeIsMember(robj *subject, robj *value);
 977 setTypeIterator *setTypeInitIterator(robj *subject);
 978 void setTypeReleaseIterator(setTypeIterator *si);
 979 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 980 robj *setTypeNextObject(setTypeIterator *si);
 981 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 982 unsigned long setTypeSize(robj *subject);
 983 void setTypeConvert(robj *subject, int enc);
 984
 985 /* Hash data type */
 986 void convertToRealHash(robj *o);
 987 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 988 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 989 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 990 robj *hashTypeGetObject(robj *o, robj *key);
 991 int hashTypeExists(robj *o, robj *key);
 992 int hashTypeSet(robj *o, robj *key, robj *value);
 993 int hashTypeDelete(robj *o, robj *key);
 994 unsigned long hashTypeLength(robj *o);
 995 hashTypeIterator *hashTypeInitIterator(robj *subject);
 996 void hashTypeReleaseIterator(hashTypeIterator *hi);
 997 int hashTypeNext(hashTypeIterator *hi);
 998 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 999 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
1000 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
1001
1002 /* Pub / Sub */
1003 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
1004 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
1005 void freePubsubPattern(void *p);
1006 int listMatchPubsubPattern(void *a, void *b);
1007
1008 /* Configuration */
1009 void loadServerConfig(char *filename);
1010 void appendServerSaveParams(time_t seconds, int changes);
1011 void resetServerSaveParams();
1012
1013 /* db.c -- Keyspace access API */
1014 int removeExpire(redisDb *db, robj *key);
1015 void propagateExpire(redisDb *db, robj *key);
1016 int expireIfNeeded(redisDb *db, robj *key);
1017 time_t getExpire(redisDb *db, robj *key);
1018 void setExpire(redisDb *db, robj *key, time_t when);
1019 robj *lookupKey(redisDb *db, robj *key);
1020 robj *lookupKeyRead(redisDb *db, robj *key);
1021 robj *lookupKeyWrite(redisDb *db, robj *key);
1022 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
1023 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
1024 int dbAdd(redisDb *db, robj *key, robj *val);
1025 int dbReplace(redisDb *db, robj *key, robj *val);
1026 int dbExists(redisDb *db, robj *key);
1027 robj *dbRandomKey(redisDb *db);
1028 int dbDelete(redisDb *db, robj *key);
1029 long long emptyDb();
1030 int selectDb(redisClient *c, int id);
1031 void signalModifiedKey(redisDb *db, robj *key);
1032 void signalFlushedDb(int dbid);
1033 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
1034
1035 /* API to get key arguments from commands */
1036 #define REDIS_GETKEYS_ALL 0
1037 #define REDIS_GETKEYS_PRELOAD 1
1038 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1039 void getKeysFreeResult(int *result);
1040 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1041 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1042 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1043
1044 /* Cluster */
1045 void clusterInit(void);
1046 unsigned short crc16(const char *buf, int len);
1047 unsigned int keyHashSlot(char *key, int keylen);
1048 clusterNode *createClusterNode(char *nodename, int flags);
1049 int clusterAddNode(clusterNode *node);
1050 void clusterCron(void);
1051 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1052
1053 /* Git SHA1 */
1054 char *redisGitSHA1(void);
1055 char *redisGitDirty(void);
1056
1057 /* Commands prototypes */
1058 void authCommand(redisClient *c);
1059 void pingCommand(redisClient *c);
1060 void echoCommand(redisClient *c);
1061 void setCommand(redisClient *c);
1062 void setnxCommand(redisClient *c);
1063 void setexCommand(redisClient *c);
1064 void getCommand(redisClient *c);
1065 void delCommand(redisClient *c);
1066 void existsCommand(redisClient *c);
1067 void setbitCommand(redisClient *c);
1068 void getbitCommand(redisClient *c);
1069 void setrangeCommand(redisClient *c);
1070 void getrangeCommand(redisClient *c);
1071 void incrCommand(redisClient *c);
1072 void decrCommand(redisClient *c);
1073 void incrbyCommand(redisClient *c);
1074 void decrbyCommand(redisClient *c);
1075 void selectCommand(redisClient *c);
1076 void randomkeyCommand(redisClient *c);
1077 void keysCommand(redisClient *c);
1078 void dbsizeCommand(redisClient *c);
1079 void lastsaveCommand(redisClient *c);
1080 void saveCommand(redisClient *c);
1081 void bgsaveCommand(redisClient *c);
1082 void bgrewriteaofCommand(redisClient *c);
1083 void shutdownCommand(redisClient *c);
1084 void moveCommand(redisClient *c);
1085 void renameCommand(redisClient *c);
1086 void renamenxCommand(redisClient *c);
1087 void lpushCommand(redisClient *c);
1088 void rpushCommand(redisClient *c);
1089 void lpushxCommand(redisClient *c);
1090 void rpushxCommand(redisClient *c);
1091 void linsertCommand(redisClient *c);
1092 void lpopCommand(redisClient *c);
1093 void rpopCommand(redisClient *c);
1094 void llenCommand(redisClient *c);
1095 void lindexCommand(redisClient *c);
1096 void lrangeCommand(redisClient *c);
1097 void ltrimCommand(redisClient *c);
1098 void typeCommand(redisClient *c);
1099 void lsetCommand(redisClient *c);
1100 void saddCommand(redisClient *c);
1101 void sremCommand(redisClient *c);
1102 void smoveCommand(redisClient *c);
1103 void sismemberCommand(redisClient *c);
1104 void scardCommand(redisClient *c);
1105 void spopCommand(redisClient *c);
1106 void srandmemberCommand(redisClient *c);
1107 void sinterCommand(redisClient *c);
1108 void sinterstoreCommand(redisClient *c);
1109 void sunionCommand(redisClient *c);
1110 void sunionstoreCommand(redisClient *c);
1111 void sdiffCommand(redisClient *c);
1112 void sdiffstoreCommand(redisClient *c);
1113 void syncCommand(redisClient *c);
1114 void flushdbCommand(redisClient *c);
1115 void flushallCommand(redisClient *c);
1116 void sortCommand(redisClient *c);
1117 void lremCommand(redisClient *c);
1118 void rpoplpushCommand(redisClient *c);
1119 void infoCommand(redisClient *c);
1120 void mgetCommand(redisClient *c);
1121 void monitorCommand(redisClient *c);
1122 void expireCommand(redisClient *c);
1123 void expireatCommand(redisClient *c);
1124 void getsetCommand(redisClient *c);
1125 void ttlCommand(redisClient *c);
1126 void persistCommand(redisClient *c);
1127 void slaveofCommand(redisClient *c);
1128 void debugCommand(redisClient *c);
1129 void msetCommand(redisClient *c);
1130 void msetnxCommand(redisClient *c);
1131 void zaddCommand(redisClient *c);
1132 void zincrbyCommand(redisClient *c);
1133 void zrangeCommand(redisClient *c);
1134 void zrangebyscoreCommand(redisClient *c);
1135 void zrevrangebyscoreCommand(redisClient *c);
1136 void zcountCommand(redisClient *c);
1137 void zrevrangeCommand(redisClient *c);
1138 void zcardCommand(redisClient *c);
1139 void zremCommand(redisClient *c);
1140 void zscoreCommand(redisClient *c);
1141 void zremrangebyscoreCommand(redisClient *c);
1142 void multiCommand(redisClient *c);
1143 void execCommand(redisClient *c);
1144 void discardCommand(redisClient *c);
1145 void blpopCommand(redisClient *c);
1146 void brpopCommand(redisClient *c);
1147 void brpoplpushCommand(redisClient *c);
1148 void appendCommand(redisClient *c);
1149 void strlenCommand(redisClient *c);
1150 void zrankCommand(redisClient *c);
1151 void zrevrankCommand(redisClient *c);
1152 void hsetCommand(redisClient *c);
1153 void hsetnxCommand(redisClient *c);
1154 void hgetCommand(redisClient *c);
1155 void hmsetCommand(redisClient *c);
1156 void hmgetCommand(redisClient *c);
1157 void hdelCommand(redisClient *c);
1158 void hlenCommand(redisClient *c);
1159 void zremrangebyrankCommand(redisClient *c);
1160 void zunionstoreCommand(redisClient *c);
1161 void zinterstoreCommand(redisClient *c);
1162 void hkeysCommand(redisClient *c);
1163 void hvalsCommand(redisClient *c);
1164 void hgetallCommand(redisClient *c);
1165 void hexistsCommand(redisClient *c);
1166 void configCommand(redisClient *c);
1167 void hincrbyCommand(redisClient *c);
1168 void subscribeCommand(redisClient *c);
1169 void unsubscribeCommand(redisClient *c);
1170 void psubscribeCommand(redisClient *c);
1171 void punsubscribeCommand(redisClient *c);
1172 void publishCommand(redisClient *c);
1173 void watchCommand(redisClient *c);
1174 void unwatchCommand(redisClient *c);
1175 void clusterCommand(redisClient *c);
1176 void restoreCommand(redisClient *c);
1177 void migrateCommand(redisClient *c);
1178 void dumpCommand(redisClient *c);
1179 void objectCommand(redisClient *c);
1180 void clientCommand(redisClient *c);
1181
1182 #if defined(__GNUC__)
1183 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1184 void free(void *ptr) __attribute__ ((deprecated));
1185 void *malloc(size_t size) __attribute__ ((deprecated));
1186 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1187 #endif
1188
1189 #endif