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 #include <signal.h>
  24
  25 #include "ae.h"      /* Event driven programming library */
  26 #include "sds.h"     /* Dynamic safe strings */
  27 #include "dict.h"    /* Hash tables */
  28 #include "adlist.h"  /* Linked lists */
  29 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  30 #include "anet.h"    /* Networking the easy way */
  31 #include "zipmap.h"  /* Compact string -> string data structure */
  32 #include "ziplist.h" /* Compact list data structure */
  33 #include "intset.h"  /* Compact integer set structure */
  34 #include "version.h" /* Version macro */
  35 #include "util.h"    /* Misc functions useful in many places */
  36
  37 /* Error codes */
  38 #define REDIS_OK                0
  39 #define REDIS_ERR               -1
  40
  41 /* Static server configuration */
  42 #define REDIS_SERVERPORT        6379    /* TCP port */
  43 #define REDIS_MAXIDLETIME       0       /* default client timeout: infinite */
  44 #define REDIS_DEFAULT_DBNUM     16
  45 #define REDIS_CONFIGLINE_MAX    1024
  46 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  47 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  48 #define REDIS_SHARED_INTEGERS 10000
  49 #define REDIS_SHARED_BULKHDR_LEN 32
  50 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  51 #define REDIS_AOF_REWRITE_PERC  100
  52 #define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
  53 #define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
  54 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  55 #define REDIS_SLOWLOG_MAX_LEN 64
  56 #define REDIS_MAX_CLIENTS 10000
  57
  58 #define REDIS_REPL_TIMEOUT 60
  59 #define REDIS_REPL_PING_SLAVE_PERIOD 10
  60
  61 /* Protocol and I/O related defines */
  62 #define REDIS_MAX_QUERYBUF_LEN  (1024*1024*1024) /* 1GB max query buffer. */
  63 #define REDIS_IOBUF_LEN         (1024*16)  /* Generic I/O buffer size */
  64 #define REDIS_REPLY_CHUNK_BYTES (16*1024) /* 16k output buffer */
  65 #define REDIS_INLINE_MAX_SIZE   (1024*64) /* Max size of inline reads */
  66 #define REDIS_MBULK_BIG_ARG     (1024*32)
  67
  68 /* Hash table parameters */
  69 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  70
  71 /* Command flags. Please check the command table defined in the redis.c file
  72  * for more information about the meaning of every flag. */
  73 #define REDIS_CMD_WRITE 1                   /* "w" flag */
  74 #define REDIS_CMD_READONLY 2                /* "r" flag */
  75 #define REDIS_CMD_DENYOOM 4                 /* "m" flag */
  76 #define REDIS_CMD_FORCE_REPLICATION 8       /* "f" flag */
  77 #define REDIS_CMD_ADMIN 16                  /* "a" flag */
  78 #define REDIS_CMD_PUBSUB 32                 /* "p" flag */
  79 #define REDIS_CMD_NOSCRIPT  64              /* "s" flag */
  80 #define REDIS_CMD_RANDOM 128                /* "R" flag */
  81 #define REDIS_CMD_SORT_FOR_SCRIPT 256       /* "S" flag */
  82
  83 /* Object types */
  84 #define REDIS_STRING 0
  85 #define REDIS_LIST 1
  86 #define REDIS_SET 2
  87 #define REDIS_ZSET 3
  88 #define REDIS_HASH 4
  89 #define REDIS_VMPOINTER 8
  90
  91 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  92  * internally represented in multiple ways. The 'encoding' field of the object
  93  * is set to one of this fields for this object. */
  94 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  95 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  96 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  97 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  98 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  99 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
 100 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
 101 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
 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 /* AOF states */
 131 #define REDIS_AOF_OFF 0             /* AOF is off */
 132 #define REDIS_AOF_ON 1              /* AOF is on */
 133 #define REDIS_AOF_WAIT_REWRITE 2    /* AOF waits rewrite to start appending */
 134
 135 /* Client flags */
 136 #define REDIS_SLAVE 1       /* This client is a slave server */
 137 #define REDIS_MASTER 2      /* This client is a master server */
 138 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 139 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 140 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 141 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 142 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 143 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 144                                server.unblocked_clients */
 145 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 146 #define REDIS_ASKING 1024   /* Client issued the ASKING command */
 147 #define REDIS_CLOSE_ASAP 2048 /* Close this client ASAP */
 148
 149 /* Client request types */
 150 #define REDIS_REQ_INLINE 1
 151 #define REDIS_REQ_MULTIBULK 2
 152
 153 /* Client classes for client limits, currently used only for
 154  * the max-client-output-buffer limit implementation. */
 155 #define REDIS_CLIENT_LIMIT_CLASS_NORMAL 0
 156 #define REDIS_CLIENT_LIMIT_CLASS_SLAVE 1
 157 #define REDIS_CLIENT_LIMIT_CLASS_PUBSUB 2
 158 #define REDIS_CLIENT_LIMIT_NUM_CLASSES 3
 159
 160 /* Slave replication state - slave side */
 161 #define REDIS_REPL_NONE 0 /* No active replication */
 162 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
 163 #define REDIS_REPL_CONNECTING 2 /* Connecting to master */
 164 #define REDIS_REPL_TRANSFER 3 /* Receiving .rdb from master */
 165 #define REDIS_REPL_CONNECTED 4 /* Connected to master */
 166
 167 /* Synchronous read timeout - slave side */
 168 #define REDIS_REPL_SYNCIO_TIMEOUT 5
 169
 170 /* Slave replication state - from the point of view of master
 171  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 172  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 173  * to start the next background saving in order to send updates to it. */
 174 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 175 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 176 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 177 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 178
 179 /* List related stuff */
 180 #define REDIS_HEAD 0
 181 #define REDIS_TAIL 1
 182
 183 /* Sort operations */
 184 #define REDIS_SORT_GET 0
 185 #define REDIS_SORT_ASC 1
 186 #define REDIS_SORT_DESC 2
 187 #define REDIS_SORTKEY_MAX 1024
 188
 189 /* Log levels */
 190 #define REDIS_DEBUG 0
 191 #define REDIS_VERBOSE 1
 192 #define REDIS_NOTICE 2
 193 #define REDIS_WARNING 3
 194 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 195
 196 /* Anti-warning macro... */
 197 #define REDIS_NOTUSED(V) ((void) V)
 198
 199 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 200 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 201
 202 /* Append only defines */
 203 #define AOF_FSYNC_NO 0
 204 #define AOF_FSYNC_ALWAYS 1
 205 #define AOF_FSYNC_EVERYSEC 2
 206
 207 /* Zip structure related defaults */
 208 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 209 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 210 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 211 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 212 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 213 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 214 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 215
 216 /* Sets operations codes */
 217 #define REDIS_OP_UNION 0
 218 #define REDIS_OP_DIFF 1
 219 #define REDIS_OP_INTER 2
 220
 221 /* Redis maxmemory strategies */
 222 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 223 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 224 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 225 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 226 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 227 #define REDIS_MAXMEMORY_NO_EVICTION 5
 228
 229 /* Scripting */
 230 #define REDIS_LUA_TIME_LIMIT 5000 /* milliseconds */
 231
 232 /* Units */
 233 #define UNIT_SECONDS 0
 234 #define UNIT_MILLISECONDS 1
 235
 236 /* SHUTDOWN flags */
 237 #define REDIS_SHUTDOWN_SAVE 1       /* Force SAVE on SHUTDOWN even if no save
 238                                        points are configured. */
 239 #define REDIS_SHUTDOWN_NOSAVE 2     /* Don't SAVE on SHUTDOWN. */
 240
 241 /* Command call flags, see call() function */
 242 #define REDIS_CALL_NONE 0
 243 #define REDIS_CALL_SLOWLOG 1
 244 #define REDIS_CALL_STATS 2
 245 #define REDIS_CALL_PROPAGATE 4
 246 #define REDIS_CALL_FULL (REDIS_CALL_SLOWLOG | REDIS_CALL_STATS | REDIS_CALL_PROPAGATE)
 247
 248 /* We can print the stacktrace, so our assert is defined this way: */
 249 #define redisAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_redisAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),_exit(1)))
 250 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 251 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 252
 253 /*-----------------------------------------------------------------------------
 254  * Data types
 255  *----------------------------------------------------------------------------*/
 256
 257 /* A redis object, that is a type able to hold a string / list / set */
 258
 259 /* The actual Redis Object */
 260 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 261 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 262 typedef struct redisObject {
 263     unsigned type:4;
 264     unsigned notused:2;     /* Not used */
 265     unsigned encoding:4;
 266     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 267     int refcount;
 268     void *ptr;
 269 } robj;
 270
 271 /* Macro used to initalize a Redis object allocated on the stack.
 272  * Note that this macro is taken near the structure definition to make sure
 273  * we'll update it when the structure is changed, to avoid bugs like
 274  * bug #85 introduced exactly in this way. */
 275 #define initStaticStringObject(_var,_ptr) do { \
 276     _var.refcount = 1; \
 277     _var.type = REDIS_STRING; \
 278     _var.encoding = REDIS_ENCODING_RAW; \
 279     _var.ptr = _ptr; \
 280 } while(0);
 281
 282 typedef struct redisDb {
 283     dict *dict;                 /* The keyspace for this DB */
 284     dict *expires;              /* Timeout of keys with a timeout set */
 285     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 286     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 287     int id;
 288 } redisDb;
 289
 290 /* Client MULTI/EXEC state */
 291 typedef struct multiCmd {
 292     robj **argv;
 293     int argc;
 294     struct redisCommand *cmd;
 295 } multiCmd;
 296
 297 typedef struct multiState {
 298     multiCmd *commands;     /* Array of MULTI commands */
 299     int count;              /* Total number of MULTI commands */
 300 } multiState;
 301
 302 typedef struct blockingState {
 303     robj **keys;            /* The key we are waiting to terminate a blocking
 304                              * operation such as BLPOP. Otherwise NULL. */
 305     int count;              /* Number of blocking keys */
 306     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 307                              * is >= timeout then the operation timed out. */
 308     robj *target;           /* The key that should receive the element,
 309                              * for BRPOPLPUSH. */
 310 } blockingState;
 311
 312 /* With multiplexing we need to take per-clinet state.
 313  * Clients are taken in a liked list. */
 314 typedef struct redisClient {
 315     int fd;
 316     redisDb *db;
 317     int dictid;
 318     sds querybuf;
 319     int argc;
 320     robj **argv;
 321     struct redisCommand *cmd, *lastcmd;
 322     int reqtype;
 323     int multibulklen;       /* number of multi bulk arguments left to read */
 324     long bulklen;           /* length of bulk argument in multi bulk request */
 325     list *reply;
 326     unsigned long reply_bytes; /* Tot bytes of objects in reply list */
 327     int sentlen;
 328     time_t lastinteraction; /* time of the last interaction, used for timeout */
 329     time_t obuf_soft_limit_reached_time;
 330     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 331     int slaveseldb;         /* slave selected db, if this client is a slave */
 332     int authenticated;      /* when requirepass is non-NULL */
 333     int replstate;          /* replication state if this is a slave */
 334     int repldbfd;           /* replication DB file descriptor */
 335     long repldboff;         /* replication DB file offset */
 336     off_t repldbsize;       /* replication DB file size */
 337     multiState mstate;      /* MULTI/EXEC state */
 338     blockingState bpop;   /* blocking state */
 339     list *io_keys;          /* Keys this client is waiting to be loaded from the
 340                              * swap file in order to continue. */
 341     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 342     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 343     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 344
 345     /* Response buffer */
 346     int bufpos;
 347     char buf[REDIS_REPLY_CHUNK_BYTES];
 348 } redisClient;
 349
 350 struct saveparam {
 351     time_t seconds;
 352     int changes;
 353 };
 354
 355 struct sharedObjectsStruct {
 356     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 357     *colon, *nullbulk, *nullmultibulk, *queued,
 358     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 359     *outofrangeerr, *noscripterr, *loadingerr, *slowscripterr, *plus,
 360     *select0, *select1, *select2, *select3, *select4,
 361     *select5, *select6, *select7, *select8, *select9,
 362     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk,
 363     *psubscribebulk, *punsubscribebulk, *del,
 364     *integers[REDIS_SHARED_INTEGERS],
 365     *mbulkhdr[REDIS_SHARED_BULKHDR_LEN], /* "*<value>\r\n" */
 366     *bulkhdr[REDIS_SHARED_BULKHDR_LEN];  /* "$<value>\r\n" */
 367 };
 368
 369 /* ZSETs use a specialized version of Skiplists */
 370 typedef struct zskiplistNode {
 371     robj *obj;
 372     double score;
 373     struct zskiplistNode *backward;
 374     struct zskiplistLevel {
 375         struct zskiplistNode *forward;
 376         unsigned int span;
 377     } level[];
 378 } zskiplistNode;
 379
 380 typedef struct zskiplist {
 381     struct zskiplistNode *header, *tail;
 382     unsigned long length;
 383     int level;
 384 } zskiplist;
 385
 386 typedef struct zset {
 387     dict *dict;
 388     zskiplist *zsl;
 389 } zset;
 390
 391 typedef struct clientBufferLimitsConfig {
 392     unsigned long long hard_limit_bytes;
 393     unsigned long long soft_limit_bytes;
 394     time_t soft_limit_seconds;
 395 } clientBufferLimitsConfig;
 396
 397 /*-----------------------------------------------------------------------------
 398  * Redis cluster data structures
 399  *----------------------------------------------------------------------------*/
 400
 401 #define REDIS_CLUSTER_SLOTS 4096
 402 #define REDIS_CLUSTER_OK 0          /* Everything looks ok */
 403 #define REDIS_CLUSTER_FAIL 1        /* The cluster can't work */
 404 #define REDIS_CLUSTER_NEEDHELP 2    /* The cluster works, but needs some help */
 405 #define REDIS_CLUSTER_NAMELEN 40    /* sha1 hex length */
 406 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
 407
 408 struct clusterNode;
 409
 410 /* clusterLink encapsulates everything needed to talk with a remote node. */
 411 typedef struct clusterLink {
 412     int fd;                     /* TCP socket file descriptor */
 413     sds sndbuf;                 /* Packet send buffer */
 414     sds rcvbuf;                 /* Packet reception buffer */
 415     struct clusterNode *node;   /* Node related to this link if any, or NULL */
 416 } clusterLink;
 417
 418 /* Node flags */
 419 #define REDIS_NODE_MASTER 1     /* The node is a master */
 420 #define REDIS_NODE_SLAVE 2      /* The node is a slave */
 421 #define REDIS_NODE_PFAIL 4      /* Failure? Need acknowledge */
 422 #define REDIS_NODE_FAIL 8       /* The node is believed to be malfunctioning */
 423 #define REDIS_NODE_MYSELF 16    /* This node is myself */
 424 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
 425 #define REDIS_NODE_NOADDR   64  /* We don't know the address of this node */
 426 #define REDIS_NODE_MEET 128     /* Send a MEET message to this node */
 427 #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"
 428
 429 struct clusterNode {
 430     char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
 431     int flags;      /* REDIS_NODE_... */
 432     unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
 433     int numslaves;  /* Number of slave nodes, if this is a master */
 434     struct clusterNode **slaves; /* pointers to slave nodes */
 435     struct clusterNode *slaveof; /* pointer to the master node */
 436     time_t ping_sent;       /* Unix time we sent latest ping */
 437     time_t pong_received;   /* Unix time we received the pong */
 438     char *configdigest;         /* Configuration digest of this node */
 439     time_t configdigest_ts;     /* Configuration digest timestamp */
 440     char ip[16];                /* Latest known IP address of this node */
 441     int port;                   /* Latest known port of this node */
 442     clusterLink *link;          /* TCP/IP link with this node */
 443 };
 444 typedef struct clusterNode clusterNode;
 445
 446 typedef struct {
 447     char *configfile;
 448     clusterNode *myself;  /* This node */
 449     int state;            /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
 450     int node_timeout;
 451     dict *nodes;          /* Hash table of name -> clusterNode structures */
 452     clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
 453     clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
 454     clusterNode *slots[REDIS_CLUSTER_SLOTS];
 455     zskiplist *slots_to_keys;
 456 } clusterState;
 457
 458 /* Redis cluster messages header */
 459
 460 /* Note that the PING, PONG and MEET messages are actually the same exact
 461  * kind of packet. PONG is the reply to ping, in the extact format as a PING,
 462  * while MEET is a special PING that forces the receiver to add the sender
 463  * as a node (if it is not already in the list). */
 464 #define CLUSTERMSG_TYPE_PING 0          /* Ping */
 465 #define CLUSTERMSG_TYPE_PONG 1          /* Pong (reply to Ping) */
 466 #define CLUSTERMSG_TYPE_MEET 2          /* Meet "let's join" message */
 467 #define CLUSTERMSG_TYPE_FAIL 3          /* Mark node xxx as failing */
 468 #define CLUSTERMSG_TYPE_PUBLISH 4       /* Pub/Sub Publish propatagion */
 469
 470 /* Initially we don't know our "name", but we'll find it once we connect
 471  * to the first node, using the getsockname() function. Then we'll use this
 472  * address for all the next messages. */
 473 typedef struct {
 474     char nodename[REDIS_CLUSTER_NAMELEN];
 475     uint32_t ping_sent;
 476     uint32_t pong_received;
 477     char ip[16];    /* IP address last time it was seen */
 478     uint16_t port;  /* port last time it was seen */
 479     uint16_t flags;
 480     uint32_t notused; /* for 64 bit alignment */
 481 } clusterMsgDataGossip;
 482
 483 typedef struct {
 484     char nodename[REDIS_CLUSTER_NAMELEN];
 485 } clusterMsgDataFail;
 486
 487 typedef struct {
 488     uint32_t channel_len;
 489     uint32_t message_len;
 490     unsigned char bulk_data[8]; /* defined as 8 just for alignment concerns. */
 491 } clusterMsgDataPublish;
 492
 493 union clusterMsgData {
 494     /* PING, MEET and PONG */
 495     struct {
 496         /* Array of N clusterMsgDataGossip structures */
 497         clusterMsgDataGossip gossip[1];
 498     } ping;
 499
 500     /* FAIL */
 501     struct {
 502         clusterMsgDataFail about;
 503     } fail;
 504
 505     /* PUBLISH */
 506     struct {
 507         clusterMsgDataPublish msg;
 508     } publish;
 509 };
 510
 511 typedef struct {
 512     uint32_t totlen;    /* Total length of this message */
 513     uint16_t type;      /* Message type */
 514     uint16_t count;     /* Only used for some kind of messages. */
 515     char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
 516     unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
 517     char slaveof[REDIS_CLUSTER_NAMELEN];
 518     char configdigest[32];
 519     uint16_t port;      /* Sender TCP base port */
 520     unsigned char state; /* Cluster state from the POV of the sender */
 521     unsigned char notused[5]; /* Reserved for future use. For alignment. */
 522     union clusterMsgData data;
 523 } clusterMsg;
 524
 525 /*-----------------------------------------------------------------------------
 526  * Global server state
 527  *----------------------------------------------------------------------------*/
 528
 529 struct redisServer {
 530     /* General */
 531     redisDb *db;
 532     dict *commands;             /* Command table hahs table */
 533     aeEventLoop *el;
 534     unsigned lruclock:22;       /* Clock incrementing every minute, for LRU */
 535     unsigned lruclock_padding:10;
 536     int shutdown_asap;          /* SHUTDOWN needed ASAP */
 537     int activerehashing;        /* Incremental rehash in serverCron() */
 538     char *requirepass;          /* Pass for AUTH command, or NULL */
 539     char *pidfile;              /* PID file path */
 540     int arch_bits;              /* 32 or 64 depending on sizeof(long) */
 541     /* Networking */
 542     int port;                   /* TCP listening port */
 543     char *bindaddr;             /* Bind address or NULL */
 544     char *unixsocket;           /* UNIX socket path */
 545     mode_t unixsocketperm;      /* UNIX socket permission */
 546     int ipfd;                   /* TCP socket file descriptor */
 547     int sofd;                   /* Unix socket file descriptor */
 548     int cfd;                    /* Cluster bus lisetning socket */
 549     list *clients;              /* List of active clients */
 550     list *clients_to_close;     /* Clients to close asynchronously */
 551     list *slaves, *monitors;    /* List of slaves and MONITORs */
 552     redisClient *current_client; /* Current client, only used on crash report */
 553     char neterr[ANET_ERR_LEN];  /* Error buffer for anet.c */
 554     /* RDB / AOF loading information */
 555     int loading;                /* We are loading data from disk if true */
 556     off_t loading_total_bytes;
 557     off_t loading_loaded_bytes;
 558     time_t loading_start_time;
 559     /* Fast pointers to often looked up command */
 560     struct redisCommand *delCommand, *multiCommand;
 561     int cronloops;                  /* Number of times the cron function run */
 562     time_t lastsave;                /* Unix time of last save succeeede */
 563     /* Fields used only for stats */
 564     time_t stat_starttime;          /* Server start time */
 565     long long stat_numcommands;     /* Number of processed commands */
 566     long long stat_numconnections;  /* Number of connections received */
 567     long long stat_expiredkeys;     /* Number of expired keys */
 568     long long stat_evictedkeys;     /* Number of evicted keys (maxmemory) */
 569     long long stat_keyspace_hits;   /* Number of successful lookups of keys */
 570     long long stat_keyspace_misses; /* Number of failed lookups of keys */
 571     size_t stat_peak_memory;        /* Max used memory record */
 572     long long stat_fork_time;       /* Time needed to perform latets fork() */
 573     long long stat_rejected_conn;   /* Clients rejected because of maxclients */
 574     list *slowlog;                  /* SLOWLOG list of commands */
 575     long long slowlog_entry_id;     /* SLOWLOG current entry ID */
 576     long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
 577     unsigned long slowlog_max_len;     /* SLOWLOG max number of items logged */
 578     /* Configuration */
 579     int verbosity;                  /* Loglevel in redis.conf */
 580     int maxidletime;                /* Client timeout in seconds */
 581     size_t client_max_querybuf_len; /* Limit for client query buffer length */
 582     int dbnum;                      /* Total number of configured DBs */
 583     int daemonize;                  /* True if running as a daemon */
 584     clientBufferLimitsConfig client_obuf_limits[REDIS_CLIENT_LIMIT_NUM_CLASSES];
 585     /* AOF persistence */
 586     int aof_state;                  /* REDIS_AOF_(ON|OFF|WAIT_REWRITE) */
 587     int aof_fsync;                  /* Kind of fsync() policy */
 588     char *aof_filename;             /* Name of the AOF file */
 589     int aof_no_fsync_on_rewrite;    /* Don't fsync if a rewrite is in prog. */
 590     int aof_rewrite_perc;           /* Rewrite AOF if % growth is > M and... */
 591     off_t aof_rewrite_min_size;     /* the AOF file is at least N bytes. */
 592     off_t aof_rewrite_base_size;    /* AOF size on latest startup or rewrite. */
 593     off_t aof_current_size;         /* AOF current size. */
 594     int aof_rewrite_scheduled;      /* Rewrite once BGSAVE terminates. */
 595     pid_t aof_child_pid;            /* PID if rewriting process */
 596     sds aof_rewrite_buf; /* buffer taken by parent during oppend only rewrite */
 597     sds aof_buf;      /* AOF buffer, written before entering the event loop */
 598     int aof_fd;       /* File descriptor of currently selected AOF file */
 599     int aof_selected_db; /* Currently selected DB in AOF */
 600     time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
 601     time_t aof_last_fsync;            /* UNIX time of last fsync() */
 602     /* RDB persistence */
 603     long long dirty;                /* Changes to DB from the last save */
 604     long long dirty_before_bgsave;  /* Used to restore dirty on failed BGSAVE */
 605     pid_t rdb_child_pid;            /* PID of RDB saving child */
 606     struct saveparam *saveparams;   /* Save points array for RDB */
 607     int saveparamslen;              /* Number of saving points */
 608     char *rdb_filename;             /* Name of RDB file */
 609     int rdb_compression;            /* Use compression in RDB? */
 610     /* Logging */
 611     char *logfile;                  /* Path of log file */
 612     int syslog_enabled;             /* Is syslog enabled? */
 613     char *syslog_ident;             /* Syslog ident */
 614     int syslog_facility;            /* Syslog facility */
 615     /* Slave specific fields */
 616     char *masterauth;               /* AUTH with this password with master */
 617     char *masterhost;               /* Hostname of master */
 618     int masterport;                 /* Port of master */
 619     int repl_ping_slave_period;     /* Master pings the salve every N seconds */
 620     int repl_timeout;               /* Timeout after N seconds of master idle */
 621     redisClient *master;     /* Client that is master for this slave */
 622     int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
 623     int repl_state;          /* Replication status if the instance is a slave */
 624     off_t repl_transfer_left;  /* Bytes left reading .rdb  */
 625     int repl_transfer_s;     /* Slave -> Master SYNC socket */
 626     int repl_transfer_fd;    /* Slave -> Master SYNC temp file descriptor */
 627     char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
 628     time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
 629     int repl_serve_stale_data; /* Serve stale data when link is down? */
 630     time_t repl_down_since; /* Unix time at which link with master went down */
 631     /* Limits */
 632     unsigned int maxclients;        /* Max number of simultaneous clients */
 633     unsigned long long maxmemory;   /* Max number of memory bytes to use */
 634     int maxmemory_policy;           /* Policy for key evition */
 635     int maxmemory_samples;          /* Pricision of random sampling */
 636     /* Blocked clients */
 637     unsigned int bpop_blocked_clients; /* Number of clients blocked by lists */
 638     list *unblocked_clients; /* list of clients to unblock before next loop */
 639     /* Sort parameters - qsort_r() is only available under BSD so we
 640      * have to take this state global, in order to pass it to sortCompare() */
 641     int sort_dontsort;
 642     int sort_desc;
 643     int sort_alpha;
 644     int sort_bypattern;
 645     /* Zip structure config, see redis.conf for more information  */
 646     size_t hash_max_zipmap_entries;
 647     size_t hash_max_zipmap_value;
 648     size_t list_max_ziplist_entries;
 649     size_t list_max_ziplist_value;
 650     size_t set_max_intset_entries;
 651     size_t zset_max_ziplist_entries;
 652     size_t zset_max_ziplist_value;
 653     time_t unixtime;        /* Unix time sampled every second. */
 654     /* Pubsub */
 655     dict *pubsub_channels;  /* Map channels to list of subscribed clients */
 656     list *pubsub_patterns;  /* A list of pubsub_patterns */
 657     /* Cluster */
 658     int cluster_enabled;    /* Is cluster enabled? */
 659     clusterState cluster;   /* State of the cluster */
 660     /* Scripting */
 661     lua_State *lua; /* The Lua interpreter. We use just one for all clients */
 662     redisClient *lua_client;   /* The "fake client" to query Redis from Lua */
 663     redisClient *lua_caller;   /* The client running EVAL right now, or NULL */
 664     dict *lua_scripts;         /* A dictionary of SHA1 -> Lua scripts */
 665     long long lua_time_limit;  /* Script timeout in seconds */
 666     long long lua_time_start;  /* Start time of script */
 667     int lua_write_dirty;  /* True if a write command was called during the
 668                              execution of the current script. */
 669     int lua_random_dirty; /* True if a random command was called during the
 670                              execution of the current script. */
 671     int lua_timedout;     /* True if we reached the time limit for script
 672                              execution. */
 673     int lua_kill;         /* Kill the script if true. */
 674     /* Assert & bug reportign */
 675     char *assert_failed;
 676     char *assert_file;
 677     int assert_line;
 678     int bug_report_start; /* True if bug report header was already logged. */
 679 };
 680
 681 typedef struct pubsubPattern {
 682     redisClient *client;
 683     robj *pattern;
 684 } pubsubPattern;
 685
 686 typedef void redisCommandProc(redisClient *c);
 687 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 688 struct redisCommand {
 689     char *name;
 690     redisCommandProc *proc;
 691     int arity;
 692     char *sflags; /* Flags as string represenation, one char per flag. */
 693     int flags;    /* The actual flags, obtained from the 'sflags' field. */
 694     /* Use a function to determine keys arguments in a command line.
 695      * Used for Redis Cluster redirect. */
 696     redisGetKeysProc *getkeys_proc;
 697     /* What keys should be loaded in background when calling this command? */
 698     int firstkey; /* The first argument that's a key (0 = no keys) */
 699     int lastkey;  /* THe last argument that's a key */
 700     int keystep;  /* The step between first and last key */
 701     long long microseconds, calls;
 702 };
 703
 704 struct redisFunctionSym {
 705     char *name;
 706     unsigned long pointer;
 707 };
 708
 709 typedef struct _redisSortObject {
 710     robj *obj;
 711     union {
 712         double score;
 713         robj *cmpobj;
 714     } u;
 715 } redisSortObject;
 716
 717 typedef struct _redisSortOperation {
 718     int type;
 719     robj *pattern;
 720 } redisSortOperation;
 721
 722 /* Structure to hold list iteration abstraction. */
 723 typedef struct {
 724     robj *subject;
 725     unsigned char encoding;
 726     unsigned char direction; /* Iteration direction */
 727     unsigned char *zi;
 728     listNode *ln;
 729 } listTypeIterator;
 730
 731 /* Structure for an entry while iterating over a list. */
 732 typedef struct {
 733     listTypeIterator *li;
 734     unsigned char *zi;  /* Entry in ziplist */
 735     listNode *ln;       /* Entry in linked list */
 736 } listTypeEntry;
 737
 738 /* Structure to hold set iteration abstraction. */
 739 typedef struct {
 740     robj *subject;
 741     int encoding;
 742     int ii; /* intset iterator */
 743     dictIterator *di;
 744 } setTypeIterator;
 745
 746 /* Structure to hold hash iteration abstration. Note that iteration over
 747  * hashes involves both fields and values. Because it is possible that
 748  * not both are required, store pointers in the iterator to avoid
 749  * unnecessary memory allocation for fields/values. */
 750 typedef struct {
 751     int encoding;
 752     unsigned char *zi;
 753     unsigned char *zk, *zv;
 754     unsigned int zklen, zvlen;
 755
 756     dictIterator *di;
 757     dictEntry *de;
 758 } hashTypeIterator;
 759
 760 #define REDIS_HASH_KEY 1
 761 #define REDIS_HASH_VALUE 2
 762
 763 /*-----------------------------------------------------------------------------
 764  * Extern declarations
 765  *----------------------------------------------------------------------------*/
 766
 767 extern struct redisServer server;
 768 extern struct sharedObjectsStruct shared;
 769 extern dictType setDictType;
 770 extern dictType zsetDictType;
 771 extern dictType clusterNodesDictType;
 772 extern dictType dbDictType;
 773 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 774 dictType hashDictType;
 775
 776 /*-----------------------------------------------------------------------------
 777  * Functions prototypes
 778  *----------------------------------------------------------------------------*/
 779
 780 /* Utils */
 781 long long ustime(void);
 782 long long mstime(void);
 783
 784 /* networking.c -- Networking and Client related operations */
 785 redisClient *createClient(int fd);
 786 void closeTimedoutClients(void);
 787 void freeClient(redisClient *c);
 788 void resetClient(redisClient *c);
 789 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 790 void addReply(redisClient *c, robj *obj);
 791 void *addDeferredMultiBulkLength(redisClient *c);
 792 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 793 void addReplySds(redisClient *c, sds s);
 794 void processInputBuffer(redisClient *c);
 795 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 796 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 797 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 798 void addReplyBulk(redisClient *c, robj *obj);
 799 void addReplyBulkCString(redisClient *c, char *s);
 800 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 801 void addReplyBulkLongLong(redisClient *c, long long ll);
 802 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 803 void addReply(redisClient *c, robj *obj);
 804 void addReplySds(redisClient *c, sds s);
 805 void addReplyError(redisClient *c, char *err);
 806 void addReplyStatus(redisClient *c, char *status);
 807 void addReplyDouble(redisClient *c, double d);
 808 void addReplyLongLong(redisClient *c, long long ll);
 809 void addReplyMultiBulkLen(redisClient *c, long length);
 810 void copyClientOutputBuffer(redisClient *dst, redisClient *src);
 811 void *dupClientReplyValue(void *o);
 812 void getClientsMaxBuffers(unsigned long *longest_output_list,
 813                           unsigned long *biggest_input_buffer);
 814 sds getClientInfoString(redisClient *client);
 815 sds getAllClientsInfoString(void);
 816 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 817 void rewriteClientCommandArgument(redisClient *c, int i, robj *newval);
 818 unsigned long getClientOutputBufferMemoryUsage(redisClient *c);
 819 void freeClientsInAsyncFreeQueue(void);
 820 void asyncCloseClientOnOutputBufferLimitReached(redisClient *c);
 821 int getClientLimitClassByName(char *name);
 822 char *getClientLimitClassName(int class);
 823
 824 #ifdef __GNUC__
 825 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 826     __attribute__((format(printf, 2, 3)));
 827 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 828     __attribute__((format(printf, 2, 3)));
 829 #else
 830 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 831 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 832 #endif
 833
 834 /* List data type */
 835 void listTypeTryConversion(robj *subject, robj *value);
 836 void listTypePush(robj *subject, robj *value, int where);
 837 robj *listTypePop(robj *subject, int where);
 838 unsigned long listTypeLength(robj *subject);
 839 listTypeIterator *listTypeInitIterator(robj *subject, long index, unsigned char direction);
 840 void listTypeReleaseIterator(listTypeIterator *li);
 841 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 842 robj *listTypeGet(listTypeEntry *entry);
 843 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 844 int listTypeEqual(listTypeEntry *entry, robj *o);
 845 void listTypeDelete(listTypeEntry *entry);
 846 void listTypeConvert(robj *subject, int enc);
 847 void unblockClientWaitingData(redisClient *c);
 848 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 849 void popGenericCommand(redisClient *c, int where);
 850
 851 /* MULTI/EXEC/WATCH... */
 852 void unwatchAllKeys(redisClient *c);
 853 void initClientMultiState(redisClient *c);
 854 void freeClientMultiState(redisClient *c);
 855 void queueMultiCommand(redisClient *c);
 856 void touchWatchedKey(redisDb *db, robj *key);
 857 void touchWatchedKeysOnFlush(int dbid);
 858
 859 /* Redis object implementation */
 860 void decrRefCount(void *o);
 861 void incrRefCount(robj *o);
 862 robj *resetRefCount(robj *obj);
 863 void freeStringObject(robj *o);
 864 void freeListObject(robj *o);
 865 void freeSetObject(robj *o);
 866 void freeZsetObject(robj *o);
 867 void freeHashObject(robj *o);
 868 robj *createObject(int type, void *ptr);
 869 robj *createStringObject(char *ptr, size_t len);
 870 robj *dupStringObject(robj *o);
 871 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 872 robj *tryObjectEncoding(robj *o);
 873 robj *getDecodedObject(robj *o);
 874 size_t stringObjectLen(robj *o);
 875 robj *createStringObjectFromLongLong(long long value);
 876 robj *createStringObjectFromLongDouble(long double value);
 877 robj *createListObject(void);
 878 robj *createZiplistObject(void);
 879 robj *createSetObject(void);
 880 robj *createIntsetObject(void);
 881 robj *createHashObject(void);
 882 robj *createZsetObject(void);
 883 robj *createZsetZiplistObject(void);
 884 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 885 int checkType(redisClient *c, robj *o, int type);
 886 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 887 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 888 int getLongLongFromObject(robj *o, long long *target);
 889 int getLongDoubleFromObject(robj *o, long double *target);
 890 int getLongDoubleFromObjectOrReply(redisClient *c, robj *o, long double *target, const char *msg);
 891 char *strEncoding(int encoding);
 892 int compareStringObjects(robj *a, robj *b);
 893 int equalStringObjects(robj *a, robj *b);
 894 unsigned long estimateObjectIdleTime(robj *o);
 895
 896 /* Synchronous I/O with timeout */
 897 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 898 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 899 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 900
 901 /* Replication */
 902 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 903 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 904 void updateSlavesWaitingBgsave(int bgsaveerr);
 905 void replicationCron(void);
 906
 907 /* Generic persistence functions */
 908 void startLoading(FILE *fp);
 909 void loadingProgress(off_t pos);
 910 void stopLoading(void);
 911
 912 /* RDB persistence */
 913 #include "rdb.h"
 914
 915 /* AOF persistence */
 916 void flushAppendOnlyFile(int force);
 917 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 918 void aofRemoveTempFile(pid_t childpid);
 919 int rewriteAppendOnlyFileBackground(void);
 920 int loadAppendOnlyFile(char *filename);
 921 void stopAppendOnly(void);
 922 int startAppendOnly(void);
 923 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 924
 925 /* Sorted sets data type */
 926
 927 /* Struct to hold a inclusive/exclusive range spec. */
 928 typedef struct {
 929     double min, max;
 930     int minex, maxex; /* are min or max exclusive? */
 931 } zrangespec;
 932
 933 zskiplist *zslCreate(void);
 934 void zslFree(zskiplist *zsl);
 935 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 936 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 937 int zslDelete(zskiplist *zsl, double score, robj *obj);
 938 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 939 double zzlGetScore(unsigned char *sptr);
 940 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 941 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 942 unsigned int zsetLength(robj *zobj);
 943 void zsetConvert(robj *zobj, int encoding);
 944
 945 /* Core functions */
 946 void freeMemoryIfNeeded(void);
 947 int processCommand(redisClient *c);
 948 void setupSignalHandlers(void);
 949 struct redisCommand *lookupCommand(sds name);
 950 struct redisCommand *lookupCommandByCString(char *s);
 951 void call(redisClient *c, int flags);
 952 int prepareForShutdown();
 953 void redisLog(int level, const char *fmt, ...);
 954 void redisLogRaw(int level, const char *msg);
 955 void usage();
 956 void updateDictResizePolicy(void);
 957 int htNeedsResize(dict *dict);
 958 void oom(const char *msg);
 959 void populateCommandTable(void);
 960 void resetCommandTableStats(void);
 961
 962 /* Set data type */
 963 robj *setTypeCreate(robj *value);
 964 int setTypeAdd(robj *subject, robj *value);
 965 int setTypeRemove(robj *subject, robj *value);
 966 int setTypeIsMember(robj *subject, robj *value);
 967 setTypeIterator *setTypeInitIterator(robj *subject);
 968 void setTypeReleaseIterator(setTypeIterator *si);
 969 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 970 robj *setTypeNextObject(setTypeIterator *si);
 971 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 972 unsigned long setTypeSize(robj *subject);
 973 void setTypeConvert(robj *subject, int enc);
 974
 975 /* Hash data type */
 976 void convertToRealHash(robj *o);
 977 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 978 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 979 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 980 robj *hashTypeGetObject(robj *o, robj *key);
 981 int hashTypeExists(robj *o, robj *key);
 982 int hashTypeSet(robj *o, robj *key, robj *value);
 983 int hashTypeDelete(robj *o, robj *key);
 984 unsigned long hashTypeLength(robj *o);
 985 hashTypeIterator *hashTypeInitIterator(robj *subject);
 986 void hashTypeReleaseIterator(hashTypeIterator *hi);
 987 int hashTypeNext(hashTypeIterator *hi);
 988 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 989 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 990 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 991
 992 /* Pub / Sub */
 993 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 994 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 995 void freePubsubPattern(void *p);
 996 int listMatchPubsubPattern(void *a, void *b);
 997 int pubsubPublishMessage(robj *channel, robj *message);
 998
 999 /* Configuration */
1000 void loadServerConfig(char *filename, char *options);
1001 void appendServerSaveParams(time_t seconds, int changes);
1002 void resetServerSaveParams();
1003
1004 /* db.c -- Keyspace access API */
1005 int removeExpire(redisDb *db, robj *key);
1006 void propagateExpire(redisDb *db, robj *key);
1007 int expireIfNeeded(redisDb *db, robj *key);
1008 long long getExpire(redisDb *db, robj *key);
1009 void setExpire(redisDb *db, robj *key, long long when);
1010 robj *lookupKey(redisDb *db, robj *key);
1011 robj *lookupKeyRead(redisDb *db, robj *key);
1012 robj *lookupKeyWrite(redisDb *db, robj *key);
1013 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
1014 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
1015 void dbAdd(redisDb *db, robj *key, robj *val);
1016 void dbOverwrite(redisDb *db, robj *key, robj *val);
1017 void setKey(redisDb *db, robj *key, robj *val);
1018 int dbExists(redisDb *db, robj *key);
1019 robj *dbRandomKey(redisDb *db);
1020 int dbDelete(redisDb *db, robj *key);
1021 long long emptyDb();
1022 int selectDb(redisClient *c, int id);
1023 void signalModifiedKey(redisDb *db, robj *key);
1024 void signalFlushedDb(int dbid);
1025 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
1026
1027 /* API to get key arguments from commands */
1028 #define REDIS_GETKEYS_ALL 0
1029 #define REDIS_GETKEYS_PRELOAD 1
1030 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1031 void getKeysFreeResult(int *result);
1032 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1033 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1034 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1035
1036 /* Cluster */
1037 void clusterInit(void);
1038 unsigned short crc16(const char *buf, int len);
1039 unsigned int keyHashSlot(char *key, int keylen);
1040 clusterNode *createClusterNode(char *nodename, int flags);
1041 int clusterAddNode(clusterNode *node);
1042 void clusterCron(void);
1043 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1044 void clusterPropagatePublish(robj *channel, robj *message);
1045
1046 /* Scripting */
1047 void scriptingInit(void);
1048
1049 /* Git SHA1 */
1050 char *redisGitSHA1(void);
1051 char *redisGitDirty(void);
1052
1053 /* Commands prototypes */
1054 void authCommand(redisClient *c);
1055 void pingCommand(redisClient *c);
1056 void echoCommand(redisClient *c);
1057 void setCommand(redisClient *c);
1058 void setnxCommand(redisClient *c);
1059 void setexCommand(redisClient *c);
1060 void psetexCommand(redisClient *c);
1061 void getCommand(redisClient *c);
1062 void delCommand(redisClient *c);
1063 void existsCommand(redisClient *c);
1064 void setbitCommand(redisClient *c);
1065 void getbitCommand(redisClient *c);
1066 void setrangeCommand(redisClient *c);
1067 void getrangeCommand(redisClient *c);
1068 void incrCommand(redisClient *c);
1069 void decrCommand(redisClient *c);
1070 void incrbyCommand(redisClient *c);
1071 void decrbyCommand(redisClient *c);
1072 void incrbyfloatCommand(redisClient *c);
1073 void selectCommand(redisClient *c);
1074 void randomkeyCommand(redisClient *c);
1075 void keysCommand(redisClient *c);
1076 void dbsizeCommand(redisClient *c);
1077 void lastsaveCommand(redisClient *c);
1078 void saveCommand(redisClient *c);
1079 void bgsaveCommand(redisClient *c);
1080 void bgrewriteaofCommand(redisClient *c);
1081 void shutdownCommand(redisClient *c);
1082 void moveCommand(redisClient *c);
1083 void renameCommand(redisClient *c);
1084 void renamenxCommand(redisClient *c);
1085 void lpushCommand(redisClient *c);
1086 void rpushCommand(redisClient *c);
1087 void lpushxCommand(redisClient *c);
1088 void rpushxCommand(redisClient *c);
1089 void linsertCommand(redisClient *c);
1090 void lpopCommand(redisClient *c);
1091 void rpopCommand(redisClient *c);
1092 void llenCommand(redisClient *c);
1093 void lindexCommand(redisClient *c);
1094 void lrangeCommand(redisClient *c);
1095 void ltrimCommand(redisClient *c);
1096 void typeCommand(redisClient *c);
1097 void lsetCommand(redisClient *c);
1098 void saddCommand(redisClient *c);
1099 void sremCommand(redisClient *c);
1100 void smoveCommand(redisClient *c);
1101 void sismemberCommand(redisClient *c);
1102 void scardCommand(redisClient *c);
1103 void spopCommand(redisClient *c);
1104 void srandmemberCommand(redisClient *c);
1105 void sinterCommand(redisClient *c);
1106 void sinterstoreCommand(redisClient *c);
1107 void sunionCommand(redisClient *c);
1108 void sunionstoreCommand(redisClient *c);
1109 void sdiffCommand(redisClient *c);
1110 void sdiffstoreCommand(redisClient *c);
1111 void syncCommand(redisClient *c);
1112 void flushdbCommand(redisClient *c);
1113 void flushallCommand(redisClient *c);
1114 void sortCommand(redisClient *c);
1115 void lremCommand(redisClient *c);
1116 void rpoplpushCommand(redisClient *c);
1117 void infoCommand(redisClient *c);
1118 void mgetCommand(redisClient *c);
1119 void monitorCommand(redisClient *c);
1120 void expireCommand(redisClient *c);
1121 void expireatCommand(redisClient *c);
1122 void pexpireCommand(redisClient *c);
1123 void pexpireatCommand(redisClient *c);
1124 void getsetCommand(redisClient *c);
1125 void ttlCommand(redisClient *c);
1126 void pttlCommand(redisClient *c);
1127 void persistCommand(redisClient *c);
1128 void slaveofCommand(redisClient *c);
1129 void debugCommand(redisClient *c);
1130 void msetCommand(redisClient *c);
1131 void msetnxCommand(redisClient *c);
1132 void zaddCommand(redisClient *c);
1133 void zincrbyCommand(redisClient *c);
1134 void zrangeCommand(redisClient *c);
1135 void zrangebyscoreCommand(redisClient *c);
1136 void zrevrangebyscoreCommand(redisClient *c);
1137 void zcountCommand(redisClient *c);
1138 void zrevrangeCommand(redisClient *c);
1139 void zcardCommand(redisClient *c);
1140 void zremCommand(redisClient *c);
1141 void zscoreCommand(redisClient *c);
1142 void zremrangebyscoreCommand(redisClient *c);
1143 void multiCommand(redisClient *c);
1144 void execCommand(redisClient *c);
1145 void discardCommand(redisClient *c);
1146 void blpopCommand(redisClient *c);
1147 void brpopCommand(redisClient *c);
1148 void brpoplpushCommand(redisClient *c);
1149 void appendCommand(redisClient *c);
1150 void strlenCommand(redisClient *c);
1151 void zrankCommand(redisClient *c);
1152 void zrevrankCommand(redisClient *c);
1153 void hsetCommand(redisClient *c);
1154 void hsetnxCommand(redisClient *c);
1155 void hgetCommand(redisClient *c);
1156 void hmsetCommand(redisClient *c);
1157 void hmgetCommand(redisClient *c);
1158 void hdelCommand(redisClient *c);
1159 void hlenCommand(redisClient *c);
1160 void zremrangebyrankCommand(redisClient *c);
1161 void zunionstoreCommand(redisClient *c);
1162 void zinterstoreCommand(redisClient *c);
1163 void hkeysCommand(redisClient *c);
1164 void hvalsCommand(redisClient *c);
1165 void hgetallCommand(redisClient *c);
1166 void hexistsCommand(redisClient *c);
1167 void configCommand(redisClient *c);
1168 void hincrbyCommand(redisClient *c);
1169 void hincrbyfloatCommand(redisClient *c);
1170 void subscribeCommand(redisClient *c);
1171 void unsubscribeCommand(redisClient *c);
1172 void psubscribeCommand(redisClient *c);
1173 void punsubscribeCommand(redisClient *c);
1174 void publishCommand(redisClient *c);
1175 void watchCommand(redisClient *c);
1176 void unwatchCommand(redisClient *c);
1177 void clusterCommand(redisClient *c);
1178 void restoreCommand(redisClient *c);
1179 void migrateCommand(redisClient *c);
1180 void askingCommand(redisClient *c);
1181 void dumpCommand(redisClient *c);
1182 void objectCommand(redisClient *c);
1183 void clientCommand(redisClient *c);
1184 void evalCommand(redisClient *c);
1185 void evalShaCommand(redisClient *c);
1186 void scriptCommand(redisClient *c);
1187
1188 #if defined(__GNUC__)
1189 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1190 void free(void *ptr) __attribute__ ((deprecated));
1191 void *malloc(size_t size) __attribute__ ((deprecated));
1192 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1193 #endif
1194
1195 /* Debugging stuff */
1196 void _redisAssertWithInfo(redisClient *c, robj *o, char *estr, char *file, int line);
1197 void _redisAssert(char *estr, char *file, int line);
1198 void _redisPanic(char *msg, char *file, int line);
1199 void bugReportStart(void);
1200 void redisLogObjectDebugInfo(robj *o);
1201 void sigsegvHandler(int sig, siginfo_t *info, void *secret);
1202 sds genRedisInfoString(char *section);
1203 #endif