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 "ziplist.h" /* Compact list data structure */
  32 #include "intset.h"  /* Compact integer set structure */
  33 #include "version.h" /* Version macro */
  34 #include "util.h"    /* Misc functions useful in many places */
  35
  36 /* Error codes */
  37 #define REDIS_OK                0
  38 #define REDIS_ERR               -1
  39
  40 /* Static server configuration */
  41 #define REDIS_HZ                100     /* Time interrupt calls/sec. */
  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_EXPIRELOOKUPS_TIME_PERC   25 /* CPU max % for keys collection */
  48 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  49 #define REDIS_SHARED_SELECT_CMDS 10
  50 #define REDIS_SHARED_INTEGERS 10000
  51 #define REDIS_SHARED_BULKHDR_LEN 32
  52 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  53 #define REDIS_AOF_REWRITE_PERC  100
  54 #define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
  55 #define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
  56 #define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
  57 #define REDIS_SLOWLOG_MAX_LEN 128
  58 #define REDIS_MAX_CLIENTS 10000
  59 #define REDIS_AUTHPASS_MAX_LEN 512
  60 #define REDIS_DEFAULT_SLAVE_PRIORITY 100
  61 #define REDIS_REPL_TIMEOUT 60
  62 #define REDIS_REPL_PING_SLAVE_PERIOD 10
  63 #define REDIS_RUN_ID_SIZE 40
  64 #define REDIS_OPS_SEC_SAMPLES 16
  65
  66 /* Protocol and I/O related defines */
  67 #define REDIS_MAX_QUERYBUF_LEN  (1024*1024*1024) /* 1GB max query buffer. */
  68 #define REDIS_IOBUF_LEN         (1024*16)  /* Generic I/O buffer size */
  69 #define REDIS_REPLY_CHUNK_BYTES (16*1024) /* 16k output buffer */
  70 #define REDIS_INLINE_MAX_SIZE   (1024*64) /* Max size of inline reads */
  71 #define REDIS_MBULK_BIG_ARG     (1024*32)
  72
  73 /* Hash table parameters */
  74 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  75
  76 /* Command flags. Please check the command table defined in the redis.c file
  77  * for more information about the meaning of every flag. */
  78 #define REDIS_CMD_WRITE 1                   /* "w" flag */
  79 #define REDIS_CMD_READONLY 2                /* "r" flag */
  80 #define REDIS_CMD_DENYOOM 4                 /* "m" flag */
  81 #define REDIS_CMD_FORCE_REPLICATION 8       /* "f" flag */
  82 #define REDIS_CMD_ADMIN 16                  /* "a" flag */
  83 #define REDIS_CMD_PUBSUB 32                 /* "p" flag */
  84 #define REDIS_CMD_NOSCRIPT  64              /* "s" flag */
  85 #define REDIS_CMD_RANDOM 128                /* "R" flag */
  86 #define REDIS_CMD_SORT_FOR_SCRIPT 256       /* "S" flag */
  87 #define REDIS_CMD_LOADING 512               /* "l" flag */
  88 #define REDIS_CMD_STALE 1024                /* "t" flag */
  89 #define REDIS_CMD_SKIP_MONITOR 2048         /* "M" flag */
  90
  91 /* Object types */
  92 #define REDIS_STRING 0
  93 #define REDIS_LIST 1
  94 #define REDIS_SET 2
  95 #define REDIS_ZSET 3
  96 #define REDIS_HASH 4
  97
  98 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  99  * internally represented in multiple ways. The 'encoding' field of the object
 100  * is set to one of this fields for this object. */
 101 #define REDIS_ENCODING_RAW 0     /* Raw representation */
 102 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
 103 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
 104 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
 105 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
 106 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
 107 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
 108 #define REDIS_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
 109
 110 /* Defines related to the dump file format. To store 32 bits lengths for short
 111  * keys requires a lot of space, so we check the most significant 2 bits of
 112  * the first byte to interpreter the length:
 113  *
 114  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
 115  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
 116  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
 117  * 11|000000 this means: specially encoded object will follow. The six bits
 118  *           number specify the kind of object that follows.
 119  *           See the REDIS_RDB_ENC_* defines.
 120  *
 121  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 122  * values, will fit inside. */
 123 #define REDIS_RDB_6BITLEN 0
 124 #define REDIS_RDB_14BITLEN 1
 125 #define REDIS_RDB_32BITLEN 2
 126 #define REDIS_RDB_ENCVAL 3
 127 #define REDIS_RDB_LENERR UINT_MAX
 128
 129 /* When a length of a string object stored on disk has the first two bits
 130  * set, the remaining two bits specify a special encoding for the object
 131  * accordingly to the following defines: */
 132 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 133 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 134 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 135 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 136
 137 /* AOF states */
 138 #define REDIS_AOF_OFF 0             /* AOF is off */
 139 #define REDIS_AOF_ON 1              /* AOF is on */
 140 #define REDIS_AOF_WAIT_REWRITE 2    /* AOF waits rewrite to start appending */
 141
 142 /* Client flags */
 143 #define REDIS_SLAVE 1       /* This client is a slave server */
 144 #define REDIS_MASTER 2      /* This client is a master server */
 145 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 146 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 147 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 148 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 149 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 150 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 151                                server.unblocked_clients */
 152 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
 153 #define REDIS_ASKING 1024   /* Client issued the ASKING command */
 154 #define REDIS_CLOSE_ASAP 2048 /* Close this client ASAP */
 155
 156 /* Client request types */
 157 #define REDIS_REQ_INLINE 1
 158 #define REDIS_REQ_MULTIBULK 2
 159
 160 /* Client classes for client limits, currently used only for
 161  * the max-client-output-buffer limit implementation. */
 162 #define REDIS_CLIENT_LIMIT_CLASS_NORMAL 0
 163 #define REDIS_CLIENT_LIMIT_CLASS_SLAVE 1
 164 #define REDIS_CLIENT_LIMIT_CLASS_PUBSUB 2
 165 #define REDIS_CLIENT_LIMIT_NUM_CLASSES 3
 166
 167 /* Slave replication state - slave side */
 168 #define REDIS_REPL_NONE 0 /* No active replication */
 169 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
 170 #define REDIS_REPL_CONNECTING 2 /* Connecting to master */
 171 #define REDIS_REPL_RECEIVE_PONG 3 /* Wait for PING reply */
 172 #define REDIS_REPL_TRANSFER 4 /* Receiving .rdb from master */
 173 #define REDIS_REPL_CONNECTED 5 /* Connected to master */
 174
 175 /* Synchronous read timeout - slave side */
 176 #define REDIS_REPL_SYNCIO_TIMEOUT 5
 177
 178 /* Slave replication state - from the point of view of master
 179  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 180  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 181  * to start the next background saving in order to send updates to it. */
 182 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 183 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 184 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 185 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 186
 187 /* List related stuff */
 188 #define REDIS_HEAD 0
 189 #define REDIS_TAIL 1
 190
 191 /* Sort operations */
 192 #define REDIS_SORT_GET 0
 193 #define REDIS_SORT_ASC 1
 194 #define REDIS_SORT_DESC 2
 195 #define REDIS_SORTKEY_MAX 1024
 196
 197 /* Log levels */
 198 #define REDIS_DEBUG 0
 199 #define REDIS_VERBOSE 1
 200 #define REDIS_NOTICE 2
 201 #define REDIS_WARNING 3
 202 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
 203
 204 /* Anti-warning macro... */
 205 #define REDIS_NOTUSED(V) ((void) V)
 206
 207 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 208 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 209
 210 /* Append only defines */
 211 #define AOF_FSYNC_NO 0
 212 #define AOF_FSYNC_ALWAYS 1
 213 #define AOF_FSYNC_EVERYSEC 2
 214
 215 /* Zip structure related defaults */
 216 #define REDIS_HASH_MAX_ZIPLIST_ENTRIES 512
 217 #define REDIS_HASH_MAX_ZIPLIST_VALUE 64
 218 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 219 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 220 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 221 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
 222 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
 223
 224 /* Sets operations codes */
 225 #define REDIS_OP_UNION 0
 226 #define REDIS_OP_DIFF 1
 227 #define REDIS_OP_INTER 2
 228
 229 /* Redis maxmemory strategies */
 230 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 231 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 232 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 233 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 234 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 235 #define REDIS_MAXMEMORY_NO_EVICTION 5
 236
 237 /* Scripting */
 238 #define REDIS_LUA_TIME_LIMIT 5000 /* milliseconds */
 239
 240 /* Units */
 241 #define UNIT_SECONDS 0
 242 #define UNIT_MILLISECONDS 1
 243
 244 /* SHUTDOWN flags */
 245 #define REDIS_SHUTDOWN_SAVE 1       /* Force SAVE on SHUTDOWN even if no save
 246                                        points are configured. */
 247 #define REDIS_SHUTDOWN_NOSAVE 2     /* Don't SAVE on SHUTDOWN. */
 248
 249 /* Command call flags, see call() function */
 250 #define REDIS_CALL_NONE 0
 251 #define REDIS_CALL_SLOWLOG 1
 252 #define REDIS_CALL_STATS 2
 253 #define REDIS_CALL_PROPAGATE 4
 254 #define REDIS_CALL_FULL (REDIS_CALL_SLOWLOG | REDIS_CALL_STATS | REDIS_CALL_PROPAGATE)
 255
 256 /* Command propagation flags, see propagate() function */
 257 #define REDIS_PROPAGATE_NONE 0
 258 #define REDIS_PROPAGATE_AOF 1
 259 #define REDIS_PROPAGATE_REPL 2
 260
 261 /* Using the following macro you can run code inside serverCron() with the
 262  * specified period, specified in milliseconds.
 263  * The actual resolution depends on REDIS_HZ. */
 264 #define run_with_period(_ms_) if (!(server.cronloops%((_ms_)/(1000/REDIS_HZ))))
 265
 266 /* We can print the stacktrace, so our assert is defined this way: */
 267 #define redisAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_redisAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),_exit(1)))
 268 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 269 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 270
 271 /*-----------------------------------------------------------------------------
 272  * Data types
 273  *----------------------------------------------------------------------------*/
 274
 275 /* A redis object, that is a type able to hold a string / list / set */
 276
 277 /* The actual Redis Object */
 278 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 279 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 280 typedef struct redisObject {
 281     unsigned type:4;
 282     unsigned notused:2;     /* Not used */
 283     unsigned encoding:4;
 284     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 285     int refcount;
 286     void *ptr;
 287 } robj;
 288
 289 /* Macro used to initalize a Redis object allocated on the stack.
 290  * Note that this macro is taken near the structure definition to make sure
 291  * we'll update it when the structure is changed, to avoid bugs like
 292  * bug #85 introduced exactly in this way. */
 293 #define initStaticStringObject(_var,_ptr) do { \
 294     _var.refcount = 1; \
 295     _var.type = REDIS_STRING; \
 296     _var.encoding = REDIS_ENCODING_RAW; \
 297     _var.ptr = _ptr; \
 298 } while(0);
 299
 300 typedef struct redisDb {
 301     dict *dict;                 /* The keyspace for this DB */
 302     dict *expires;              /* Timeout of keys with a timeout set */
 303     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 304     dict *ready_keys;           /* Blocked keys that received a PUSH */
 305     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 306     int id;
 307 } redisDb;
 308
 309 /* Client MULTI/EXEC state */
 310 typedef struct multiCmd {
 311     robj **argv;
 312     int argc;
 313     struct redisCommand *cmd;
 314 } multiCmd;
 315
 316 typedef struct multiState {
 317     multiCmd *commands;     /* Array of MULTI commands */
 318     int count;              /* Total number of MULTI commands */
 319 } multiState;
 320
 321 typedef struct blockingState {
 322     robj **keys;            /* The key we are waiting to terminate a blocking
 323                              * operation such as BLPOP. Otherwise NULL. */
 324     int count;              /* Number of blocking keys */
 325     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 326                              * is >= timeout then the operation timed out. */
 327     robj *target;           /* The key that should receive the element,
 328                              * for BRPOPLPUSH. */
 329 } blockingState;
 330
 331 /* The following structure represents a node in the server.ready_keys list,
 332  * where we accumulate all the keys that had clients blocked with a blocking
 333  * operation such as B[LR]POP, but received new data in the context of the
 334  * last executed command.
 335  *
 336  * After the execution of every command or script, we run this list to check
 337  * if as a result we should serve data to clients blocked, unblocking them.
 338  * Note that server.ready_keys will not have duplicates as there dictionary
 339  * also called ready_keys in every structure representing a Redis database,
 340  * where we make sure to remember if a given key was already added in the
 341  * server.ready_keys list. */
 342 typedef struct readyList {
 343     redisDb *db;
 344     robj *key;
 345 } readyList;
 346
 347 /* With multiplexing we need to take per-clinet state.
 348  * Clients are taken in a liked list. */
 349 typedef struct redisClient {
 350     int fd;
 351     redisDb *db;
 352     int dictid;
 353     sds querybuf;
 354     size_t querybuf_peak;   /* Recent (100ms or more) peak of querybuf size */
 355     int argc;
 356     robj **argv;
 357     struct redisCommand *cmd, *lastcmd;
 358     int reqtype;
 359     int multibulklen;       /* number of multi bulk arguments left to read */
 360     long bulklen;           /* length of bulk argument in multi bulk request */
 361     list *reply;
 362     unsigned long reply_bytes; /* Tot bytes of objects in reply list */
 363     int sentlen;
 364     time_t ctime;           /* Client creation time */
 365     time_t lastinteraction; /* time of the last interaction, used for timeout */
 366     time_t obuf_soft_limit_reached_time;
 367     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 368     int slaveseldb;         /* slave selected db, if this client is a slave */
 369     int authenticated;      /* when requirepass is non-NULL */
 370     int replstate;          /* replication state if this is a slave */
 371     int repldbfd;           /* replication DB file descriptor */
 372     long repldboff;         /* replication DB file offset */
 373     off_t repldbsize;       /* replication DB file size */
 374     int slave_listening_port; /* As configured with: SLAVECONF listening-port */
 375     multiState mstate;      /* MULTI/EXEC state */
 376     blockingState bpop;   /* blocking state */
 377     list *io_keys;          /* Keys this client is waiting to be loaded from the
 378                              * swap file in order to continue. */
 379     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 380     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 381     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 382
 383     /* Response buffer */
 384     int bufpos;
 385     char buf[REDIS_REPLY_CHUNK_BYTES];
 386 } redisClient;
 387
 388 struct saveparam {
 389     time_t seconds;
 390     int changes;
 391 };
 392
 393 struct sharedObjectsStruct {
 394     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 395     *colon, *nullbulk, *nullmultibulk, *queued,
 396     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 397     *outofrangeerr, *noscripterr, *loadingerr, *slowscripterr, *bgsaveerr,
 398     *masterdownerr, *roslaveerr,
 399     *oomerr, *plus, *messagebulk, *pmessagebulk, *subscribebulk,
 400     *unsubscribebulk, *psubscribebulk, *punsubscribebulk, *del, *rpop, *lpop,
 401     *lpush,
 402     *select[REDIS_SHARED_SELECT_CMDS],
 403     *integers[REDIS_SHARED_INTEGERS],
 404     *mbulkhdr[REDIS_SHARED_BULKHDR_LEN], /* "*<value>\r\n" */
 405     *bulkhdr[REDIS_SHARED_BULKHDR_LEN];  /* "$<value>\r\n" */
 406 };
 407
 408 /* ZSETs use a specialized version of Skiplists */
 409 typedef struct zskiplistNode {
 410     robj *obj;
 411     double score;
 412     struct zskiplistNode *backward;
 413     struct zskiplistLevel {
 414         struct zskiplistNode *forward;
 415         unsigned int span;
 416     } level[];
 417 } zskiplistNode;
 418
 419 typedef struct zskiplist {
 420     struct zskiplistNode *header, *tail;
 421     unsigned long length;
 422     int level;
 423 } zskiplist;
 424
 425 typedef struct zset {
 426     dict *dict;
 427     zskiplist *zsl;
 428 } zset;
 429
 430 typedef struct clientBufferLimitsConfig {
 431     unsigned long long hard_limit_bytes;
 432     unsigned long long soft_limit_bytes;
 433     time_t soft_limit_seconds;
 434 } clientBufferLimitsConfig;
 435
 436 /* The redisOp structure defines a Redis Operation, that is an instance of
 437  * a command with an argument vector, database ID, propagation target
 438  * (REDIS_PROPAGATE_*), and command pointer.
 439  *
 440  * Currently only used to additionally propagate more commands to AOF/Replication
 441  * after the propagation of the executed command. */
 442 typedef struct redisOp {
 443     robj **argv;
 444     int argc, dbid, target;
 445     struct redisCommand *cmd;
 446 } redisOp;
 447
 448 /* Defines an array of Redis operations. There is an API to add to this
 449  * structure in a easy way.
 450  *
 451  * redisOpArrayInit();
 452  * redisOpArrayAppend();
 453  * redisOpArrayFree();
 454  */
 455 typedef struct redisOpArray {
 456     redisOp *ops;
 457     int numops;
 458 } redisOpArray;
 459
 460 /*-----------------------------------------------------------------------------
 461  * Global server state
 462  *----------------------------------------------------------------------------*/
 463
 464 struct redisServer {
 465     /* General */
 466     redisDb *db;
 467     dict *commands;             /* Command table hahs table */
 468     aeEventLoop *el;
 469     unsigned lruclock:22;       /* Clock incrementing every minute, for LRU */
 470     unsigned lruclock_padding:10;
 471     int shutdown_asap;          /* SHUTDOWN needed ASAP */
 472     int activerehashing;        /* Incremental rehash in serverCron() */
 473     char *requirepass;          /* Pass for AUTH command, or NULL */
 474     char *pidfile;              /* PID file path */
 475     int arch_bits;              /* 32 or 64 depending on sizeof(long) */
 476     int cronloops;              /* Number of times the cron function run */
 477     char runid[REDIS_RUN_ID_SIZE+1];  /* ID always different at every exec. */
 478     int sentinel_mode;          /* True if this instance is a Sentinel. */
 479     /* Networking */
 480     int port;                   /* TCP listening port */
 481     char *bindaddr;             /* Bind address or NULL */
 482     char *unixsocket;           /* UNIX socket path */
 483     mode_t unixsocketperm;      /* UNIX socket permission */
 484     int ipfd;                   /* TCP socket file descriptor */
 485     int sofd;                   /* Unix socket file descriptor */
 486     list *clients;              /* List of active clients */
 487     list *clients_to_close;     /* Clients to close asynchronously */
 488     list *slaves, *monitors;    /* List of slaves and MONITORs */
 489     redisClient *current_client; /* Current client, only used on crash report */
 490     char neterr[ANET_ERR_LEN];  /* Error buffer for anet.c */
 491     /* RDB / AOF loading information */
 492     int loading;                /* We are loading data from disk if true */
 493     off_t loading_total_bytes;
 494     off_t loading_loaded_bytes;
 495     time_t loading_start_time;
 496     /* Fast pointers to often looked up command */
 497     struct redisCommand *delCommand, *multiCommand, *lpushCommand, *lpopCommand,
 498                         *rpopCommand;
 499     /* Fields used only for stats */
 500     time_t stat_starttime;          /* Server start time */
 501     long long stat_numcommands;     /* Number of processed commands */
 502     long long stat_numconnections;  /* Number of connections received */
 503     long long stat_expiredkeys;     /* Number of expired keys */
 504     long long stat_evictedkeys;     /* Number of evicted keys (maxmemory) */
 505     long long stat_keyspace_hits;   /* Number of successful lookups of keys */
 506     long long stat_keyspace_misses; /* Number of failed lookups of keys */
 507     size_t stat_peak_memory;        /* Max used memory record */
 508     long long stat_fork_time;       /* Time needed to perform latets fork() */
 509     long long stat_rejected_conn;   /* Clients rejected because of maxclients */
 510     list *slowlog;                  /* SLOWLOG list of commands */
 511     long long slowlog_entry_id;     /* SLOWLOG current entry ID */
 512     long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
 513     unsigned long slowlog_max_len;     /* SLOWLOG max number of items logged */
 514     /* The following two are used to track instantaneous "load" in terms
 515      * of operations per second. */
 516     long long ops_sec_last_sample_time; /* Timestamp of last sample (in ms) */
 517     long long ops_sec_last_sample_ops;  /* numcommands in last sample */
 518     long long ops_sec_samples[REDIS_OPS_SEC_SAMPLES];
 519     int ops_sec_idx;
 520     /* Configuration */
 521     int verbosity;                  /* Loglevel in redis.conf */
 522     int maxidletime;                /* Client timeout in seconds */
 523     size_t client_max_querybuf_len; /* Limit for client query buffer length */
 524     int dbnum;                      /* Total number of configured DBs */
 525     int daemonize;                  /* True if running as a daemon */
 526     clientBufferLimitsConfig client_obuf_limits[REDIS_CLIENT_LIMIT_NUM_CLASSES];
 527     /* AOF persistence */
 528     int aof_state;                  /* REDIS_AOF_(ON|OFF|WAIT_REWRITE) */
 529     int aof_fsync;                  /* Kind of fsync() policy */
 530     char *aof_filename;             /* Name of the AOF file */
 531     int aof_no_fsync_on_rewrite;    /* Don't fsync if a rewrite is in prog. */
 532     int aof_rewrite_perc;           /* Rewrite AOF if % growth is > M and... */
 533     off_t aof_rewrite_min_size;     /* the AOF file is at least N bytes. */
 534     off_t aof_rewrite_base_size;    /* AOF size on latest startup or rewrite. */
 535     off_t aof_current_size;         /* AOF current size. */
 536     int aof_rewrite_scheduled;      /* Rewrite once BGSAVE terminates. */
 537     pid_t aof_child_pid;            /* PID if rewriting process */
 538     list *aof_rewrite_buf_blocks;   /* Hold changes during an AOF rewrite. */
 539     sds aof_buf;      /* AOF buffer, written before entering the event loop */
 540     int aof_fd;       /* File descriptor of currently selected AOF file */
 541     int aof_selected_db; /* Currently selected DB in AOF */
 542     time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
 543     time_t aof_last_fsync;            /* UNIX time of last fsync() */
 544     time_t aof_rewrite_time_last;   /* Time used by last AOF rewrite run. */
 545     time_t aof_rewrite_time_start;  /* Current AOF rewrite start time. */
 546     int aof_lastbgrewrite_status;   /* REDIS_OK or REDIS_ERR */
 547     unsigned long aof_delayed_fsync;  /* delayed AOF fsync() counter */
 548     /* RDB persistence */
 549     long long dirty;                /* Changes to DB from the last save */
 550     long long dirty_before_bgsave;  /* Used to restore dirty on failed BGSAVE */
 551     pid_t rdb_child_pid;            /* PID of RDB saving child */
 552     struct saveparam *saveparams;   /* Save points array for RDB */
 553     int saveparamslen;              /* Number of saving points */
 554     char *rdb_filename;             /* Name of RDB file */
 555     int rdb_compression;            /* Use compression in RDB? */
 556     int rdb_checksum;               /* Use RDB checksum? */
 557     time_t lastsave;                /* Unix time of last save succeeede */
 558     time_t rdb_save_time_last;      /* Time used by last RDB save run. */
 559     time_t rdb_save_time_start;     /* Current RDB save start time. */
 560     int lastbgsave_status;          /* REDIS_OK or REDIS_ERR */
 561     int stop_writes_on_bgsave_err;  /* Don't allow writes if can't BGSAVE */
 562     /* Propagation of commands in AOF / replication */
 563     redisOpArray also_propagate;    /* Additional command to propagate. */
 564     /* Logging */
 565     char *logfile;                  /* Path of log file */
 566     int syslog_enabled;             /* Is syslog enabled? */
 567     char *syslog_ident;             /* Syslog ident */
 568     int syslog_facility;            /* Syslog facility */
 569     /* Slave specific fields */
 570     char *masterauth;               /* AUTH with this password with master */
 571     char *masterhost;               /* Hostname of master */
 572     int masterport;                 /* Port of master */
 573     int repl_ping_slave_period;     /* Master pings the slave every N seconds */
 574     int repl_timeout;               /* Timeout after N seconds of master idle */
 575     redisClient *master;     /* Client that is master for this slave */
 576     int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
 577     int repl_state;          /* Replication status if the instance is a slave */
 578     off_t repl_transfer_size; /* Size of RDB to read from master during sync. */
 579     off_t repl_transfer_read; /* Amount of RDB read from master during sync. */
 580     off_t repl_transfer_last_fsync_off; /* Offset when we fsync-ed last time. */
 581     int repl_transfer_s;     /* Slave -> Master SYNC socket */
 582     int repl_transfer_fd;    /* Slave -> Master SYNC temp file descriptor */
 583     char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
 584     time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
 585     int repl_serve_stale_data; /* Serve stale data when link is down? */
 586     int repl_slave_ro;          /* Slave is read only? */
 587     time_t repl_down_since; /* Unix time at which link with master went down */
 588     int slave_priority;             /* Reported in INFO and used by Sentinel. */
 589     /* Limits */
 590     unsigned int maxclients;        /* Max number of simultaneous clients */
 591     unsigned long long maxmemory;   /* Max number of memory bytes to use */
 592     int maxmemory_policy;           /* Policy for key evition */
 593     int maxmemory_samples;          /* Pricision of random sampling */
 594     /* Blocked clients */
 595     unsigned int bpop_blocked_clients; /* Number of clients blocked by lists */
 596     list *unblocked_clients; /* list of clients to unblock before next loop */
 597     list *ready_keys;        /* List of readyList structures for BLPOP & co */
 598     /* Sort parameters - qsort_r() is only available under BSD so we
 599      * have to take this state global, in order to pass it to sortCompare() */
 600     int sort_desc;
 601     int sort_alpha;
 602     int sort_bypattern;
 603     /* Zip structure config, see redis.conf for more information  */
 604     size_t hash_max_ziplist_entries;
 605     size_t hash_max_ziplist_value;
 606     size_t list_max_ziplist_entries;
 607     size_t list_max_ziplist_value;
 608     size_t set_max_intset_entries;
 609     size_t zset_max_ziplist_entries;
 610     size_t zset_max_ziplist_value;
 611     time_t unixtime;        /* Unix time sampled every second. */
 612     /* Pubsub */
 613     dict *pubsub_channels;  /* Map channels to list of subscribed clients */
 614     list *pubsub_patterns;  /* A list of pubsub_patterns */
 615     /* Scripting */
 616     lua_State *lua; /* The Lua interpreter. We use just one for all clients */
 617     redisClient *lua_client;   /* The "fake client" to query Redis from Lua */
 618     redisClient *lua_caller;   /* The client running EVAL right now, or NULL */
 619     dict *lua_scripts;         /* A dictionary of SHA1 -> Lua scripts */
 620     long long lua_time_limit;  /* Script timeout in seconds */
 621     long long lua_time_start;  /* Start time of script */
 622     int lua_write_dirty;  /* True if a write command was called during the
 623                              execution of the current script. */
 624     int lua_random_dirty; /* True if a random command was called during the
 625                              execution of the current script. */
 626     int lua_timedout;     /* True if we reached the time limit for script
 627                              execution. */
 628     int lua_kill;         /* Kill the script if true. */
 629     /* Assert & bug reportign */
 630     char *assert_failed;
 631     char *assert_file;
 632     int assert_line;
 633     int bug_report_start; /* True if bug report header was already logged. */
 634     int watchdog_period;  /* Software watchdog period in ms. 0 = off */
 635 };
 636
 637 typedef struct pubsubPattern {
 638     redisClient *client;
 639     robj *pattern;
 640 } pubsubPattern;
 641
 642 typedef void redisCommandProc(redisClient *c);
 643 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 644 struct redisCommand {
 645     char *name;
 646     redisCommandProc *proc;
 647     int arity;
 648     char *sflags; /* Flags as string represenation, one char per flag. */
 649     int flags;    /* The actual flags, obtained from the 'sflags' field. */
 650     /* Use a function to determine keys arguments in a command line. */
 651     redisGetKeysProc *getkeys_proc;
 652     /* What keys should be loaded in background when calling this command? */
 653     int firstkey; /* The first argument that's a key (0 = no keys) */
 654     int lastkey;  /* THe last argument that's a key */
 655     int keystep;  /* The step between first and last key */
 656     long long microseconds, calls;
 657 };
 658
 659 struct redisFunctionSym {
 660     char *name;
 661     unsigned long pointer;
 662 };
 663
 664 typedef struct _redisSortObject {
 665     robj *obj;
 666     union {
 667         double score;
 668         robj *cmpobj;
 669     } u;
 670 } redisSortObject;
 671
 672 typedef struct _redisSortOperation {
 673     int type;
 674     robj *pattern;
 675 } redisSortOperation;
 676
 677 /* Structure to hold list iteration abstraction. */
 678 typedef struct {
 679     robj *subject;
 680     unsigned char encoding;
 681     unsigned char direction; /* Iteration direction */
 682     unsigned char *zi;
 683     listNode *ln;
 684 } listTypeIterator;
 685
 686 /* Structure for an entry while iterating over a list. */
 687 typedef struct {
 688     listTypeIterator *li;
 689     unsigned char *zi;  /* Entry in ziplist */
 690     listNode *ln;       /* Entry in linked list */
 691 } listTypeEntry;
 692
 693 /* Structure to hold set iteration abstraction. */
 694 typedef struct {
 695     robj *subject;
 696     int encoding;
 697     int ii; /* intset iterator */
 698     dictIterator *di;
 699 } setTypeIterator;
 700
 701 /* Structure to hold hash iteration abstration. Note that iteration over
 702  * hashes involves both fields and values. Because it is possible that
 703  * not both are required, store pointers in the iterator to avoid
 704  * unnecessary memory allocation for fields/values. */
 705 typedef struct {
 706     robj *subject;
 707     int encoding;
 708
 709     unsigned char *fptr, *vptr;
 710
 711     dictIterator *di;
 712     dictEntry *de;
 713 } hashTypeIterator;
 714
 715 #define REDIS_HASH_KEY 1
 716 #define REDIS_HASH_VALUE 2
 717
 718 /*-----------------------------------------------------------------------------
 719  * Extern declarations
 720  *----------------------------------------------------------------------------*/
 721
 722 extern struct redisServer server;
 723 extern struct sharedObjectsStruct shared;
 724 extern dictType setDictType;
 725 extern dictType zsetDictType;
 726 extern dictType dbDictType;
 727 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 728 extern dictType hashDictType;
 729
 730 /*-----------------------------------------------------------------------------
 731  * Functions prototypes
 732  *----------------------------------------------------------------------------*/
 733
 734 /* Utils */
 735 long long ustime(void);
 736 long long mstime(void);
 737 void getRandomHexChars(char *p, unsigned int len);
 738 uint64_t crc64(uint64_t crc, const unsigned char *s, uint64_t l);
 739 void exitFromChild(int retcode);
 740
 741 /* networking.c -- Networking and Client related operations */
 742 redisClient *createClient(int fd);
 743 void closeTimedoutClients(void);
 744 void freeClient(redisClient *c);
 745 void resetClient(redisClient *c);
 746 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 747 void addReply(redisClient *c, robj *obj);
 748 void *addDeferredMultiBulkLength(redisClient *c);
 749 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 750 void addReplySds(redisClient *c, sds s);
 751 void processInputBuffer(redisClient *c);
 752 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 753 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 754 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 755 void addReplyBulk(redisClient *c, robj *obj);
 756 void addReplyBulkCString(redisClient *c, char *s);
 757 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 758 void addReplyBulkLongLong(redisClient *c, long long ll);
 759 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 760 void addReply(redisClient *c, robj *obj);
 761 void addReplySds(redisClient *c, sds s);
 762 void addReplyError(redisClient *c, char *err);
 763 void addReplyStatus(redisClient *c, char *status);
 764 void addReplyDouble(redisClient *c, double d);
 765 void addReplyLongLong(redisClient *c, long long ll);
 766 void addReplyMultiBulkLen(redisClient *c, long length);
 767 void copyClientOutputBuffer(redisClient *dst, redisClient *src);
 768 void *dupClientReplyValue(void *o);
 769 void getClientsMaxBuffers(unsigned long *longest_output_list,
 770                           unsigned long *biggest_input_buffer);
 771 sds getClientInfoString(redisClient *client);
 772 sds getAllClientsInfoString(void);
 773 void rewriteClientCommandVector(redisClient *c, int argc, ...);
 774 void rewriteClientCommandArgument(redisClient *c, int i, robj *newval);
 775 unsigned long getClientOutputBufferMemoryUsage(redisClient *c);
 776 void freeClientsInAsyncFreeQueue(void);
 777 void asyncCloseClientOnOutputBufferLimitReached(redisClient *c);
 778 int getClientLimitClassByName(char *name);
 779 char *getClientLimitClassName(int class);
 780 void flushSlavesOutputBuffers(void);
 781 void disconnectSlaves(void);
 782
 783 #ifdef __GNUC__
 784 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 785     __attribute__((format(printf, 2, 3)));
 786 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 787     __attribute__((format(printf, 2, 3)));
 788 #else
 789 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 790 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 791 #endif
 792
 793 /* List data type */
 794 void listTypeTryConversion(robj *subject, robj *value);
 795 void listTypePush(robj *subject, robj *value, int where);
 796 robj *listTypePop(robj *subject, int where);
 797 unsigned long listTypeLength(robj *subject);
 798 listTypeIterator *listTypeInitIterator(robj *subject, long index, unsigned char direction);
 799 void listTypeReleaseIterator(listTypeIterator *li);
 800 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 801 robj *listTypeGet(listTypeEntry *entry);
 802 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 803 int listTypeEqual(listTypeEntry *entry, robj *o);
 804 void listTypeDelete(listTypeEntry *entry);
 805 void listTypeConvert(robj *subject, int enc);
 806 void unblockClientWaitingData(redisClient *c);
 807 void handleClientsBlockedOnLists(void);
 808 void popGenericCommand(redisClient *c, int where);
 809
 810 /* MULTI/EXEC/WATCH... */
 811 void unwatchAllKeys(redisClient *c);
 812 void initClientMultiState(redisClient *c);
 813 void freeClientMultiState(redisClient *c);
 814 void queueMultiCommand(redisClient *c);
 815 void touchWatchedKey(redisDb *db, robj *key);
 816 void touchWatchedKeysOnFlush(int dbid);
 817 void discardTransaction(redisClient *c);
 818
 819 /* Redis object implementation */
 820 void decrRefCount(void *o);
 821 void incrRefCount(robj *o);
 822 robj *resetRefCount(robj *obj);
 823 void freeStringObject(robj *o);
 824 void freeListObject(robj *o);
 825 void freeSetObject(robj *o);
 826 void freeZsetObject(robj *o);
 827 void freeHashObject(robj *o);
 828 robj *createObject(int type, void *ptr);
 829 robj *createStringObject(char *ptr, size_t len);
 830 robj *dupStringObject(robj *o);
 831 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 832 robj *tryObjectEncoding(robj *o);
 833 robj *getDecodedObject(robj *o);
 834 size_t stringObjectLen(robj *o);
 835 robj *createStringObjectFromLongLong(long long value);
 836 robj *createStringObjectFromLongDouble(long double value);
 837 robj *createListObject(void);
 838 robj *createZiplistObject(void);
 839 robj *createSetObject(void);
 840 robj *createIntsetObject(void);
 841 robj *createHashObject(void);
 842 robj *createZsetObject(void);
 843 robj *createZsetZiplistObject(void);
 844 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 845 int checkType(redisClient *c, robj *o, int type);
 846 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 847 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 848 int getLongLongFromObject(robj *o, long long *target);
 849 int getLongDoubleFromObject(robj *o, long double *target);
 850 int getLongDoubleFromObjectOrReply(redisClient *c, robj *o, long double *target, const char *msg);
 851 char *strEncoding(int encoding);
 852 int compareStringObjects(robj *a, robj *b);
 853 int equalStringObjects(robj *a, robj *b);
 854 unsigned long estimateObjectIdleTime(robj *o);
 855
 856 /* Synchronous I/O with timeout */
 857 ssize_t syncWrite(int fd, char *ptr, ssize_t size, long long timeout);
 858 ssize_t syncRead(int fd, char *ptr, ssize_t size, long long timeout);
 859 ssize_t syncReadLine(int fd, char *ptr, ssize_t size, long long timeout);
 860
 861 /* Replication */
 862 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 863 void replicationFeedMonitors(redisClient *c, list *monitors, int dictid, robj **argv, int argc);
 864 void updateSlavesWaitingBgsave(int bgsaveerr);
 865 void replicationCron(void);
 866
 867 /* Generic persistence functions */
 868 void startLoading(FILE *fp);
 869 void loadingProgress(off_t pos);
 870 void stopLoading(void);
 871
 872 /* RDB persistence */
 873 #include "rdb.h"
 874
 875 /* AOF persistence */
 876 void flushAppendOnlyFile(int force);
 877 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 878 void aofRemoveTempFile(pid_t childpid);
 879 int rewriteAppendOnlyFileBackground(void);
 880 int loadAppendOnlyFile(char *filename);
 881 void stopAppendOnly(void);
 882 int startAppendOnly(void);
 883 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 884 void aofRewriteBufferReset(void);
 885 unsigned long aofRewriteBufferSize(void);
 886
 887 /* Sorted sets data type */
 888
 889 /* Struct to hold a inclusive/exclusive range spec. */
 890 typedef struct {
 891     double min, max;
 892     int minex, maxex; /* are min or max exclusive? */
 893 } zrangespec;
 894
 895 zskiplist *zslCreate(void);
 896 void zslFree(zskiplist *zsl);
 897 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 898 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
 899 int zslDelete(zskiplist *zsl, double score, robj *obj);
 900 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
 901 double zzlGetScore(unsigned char *sptr);
 902 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 903 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
 904 unsigned int zsetLength(robj *zobj);
 905 void zsetConvert(robj *zobj, int encoding);
 906
 907 /* Core functions */
 908 int freeMemoryIfNeeded(void);
 909 int processCommand(redisClient *c);
 910 void setupSignalHandlers(void);
 911 struct redisCommand *lookupCommand(sds name);
 912 struct redisCommand *lookupCommandByCString(char *s);
 913 void call(redisClient *c, int flags);
 914 void propagate(struct redisCommand *cmd, int dbid, robj **argv, int argc, int flags);
 915 void alsoPropagate(struct redisCommand *cmd, int dbid, robj **argv, int argc, int target);
 916 int prepareForShutdown();
 917 void redisLog(int level, const char *fmt, ...);
 918 void redisLogRaw(int level, const char *msg);
 919 void redisLogFromHandler(int level, const char *msg);
 920 void usage();
 921 void updateDictResizePolicy(void);
 922 int htNeedsResize(dict *dict);
 923 void oom(const char *msg);
 924 void populateCommandTable(void);
 925 void resetCommandTableStats(void);
 926
 927 /* Set data type */
 928 robj *setTypeCreate(robj *value);
 929 int setTypeAdd(robj *subject, robj *value);
 930 int setTypeRemove(robj *subject, robj *value);
 931 int setTypeIsMember(robj *subject, robj *value);
 932 setTypeIterator *setTypeInitIterator(robj *subject);
 933 void setTypeReleaseIterator(setTypeIterator *si);
 934 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 935 robj *setTypeNextObject(setTypeIterator *si);
 936 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 937 unsigned long setTypeSize(robj *subject);
 938 void setTypeConvert(robj *subject, int enc);
 939
 940 /* Hash data type */
 941 void hashTypeConvert(robj *o, int enc);
 942 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 943 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 944 robj *hashTypeGetObject(robj *o, robj *key);
 945 int hashTypeExists(robj *o, robj *key);
 946 int hashTypeSet(robj *o, robj *key, robj *value);
 947 int hashTypeDelete(robj *o, robj *key);
 948 unsigned long hashTypeLength(robj *o);
 949 hashTypeIterator *hashTypeInitIterator(robj *subject);
 950 void hashTypeReleaseIterator(hashTypeIterator *hi);
 951 int hashTypeNext(hashTypeIterator *hi);
 952 void hashTypeCurrentFromZiplist(hashTypeIterator *hi, int what,
 953                                 unsigned char **vstr,
 954                                 unsigned int *vlen,
 955                                 long long *vll);
 956 void hashTypeCurrentFromHashTable(hashTypeIterator *hi, int what, robj **dst);
 957 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 958 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 959
 960 /* Pub / Sub */
 961 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 962 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 963 void freePubsubPattern(void *p);
 964 int listMatchPubsubPattern(void *a, void *b);
 965 int pubsubPublishMessage(robj *channel, robj *message);
 966
 967 /* Configuration */
 968 void loadServerConfig(char *filename, char *options);
 969 void appendServerSaveParams(time_t seconds, int changes);
 970 void resetServerSaveParams();
 971
 972 /* db.c -- Keyspace access API */
 973 int removeExpire(redisDb *db, robj *key);
 974 void propagateExpire(redisDb *db, robj *key);
 975 int expireIfNeeded(redisDb *db, robj *key);
 976 long long getExpire(redisDb *db, robj *key);
 977 void setExpire(redisDb *db, robj *key, long long when);
 978 robj *lookupKey(redisDb *db, robj *key);
 979 robj *lookupKeyRead(redisDb *db, robj *key);
 980 robj *lookupKeyWrite(redisDb *db, robj *key);
 981 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 982 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 983 void dbAdd(redisDb *db, robj *key, robj *val);
 984 void dbOverwrite(redisDb *db, robj *key, robj *val);
 985 void setKey(redisDb *db, robj *key, robj *val);
 986 int dbExists(redisDb *db, robj *key);
 987 robj *dbRandomKey(redisDb *db);
 988 int dbDelete(redisDb *db, robj *key);
 989 long long emptyDb();
 990 int selectDb(redisClient *c, int id);
 991 void signalModifiedKey(redisDb *db, robj *key);
 992 void signalFlushedDb(int dbid);
 993 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
 994
 995 /* API to get key arguments from commands */
 996 #define REDIS_GETKEYS_ALL 0
 997 #define REDIS_GETKEYS_PRELOAD 1
 998 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
 999 void getKeysFreeResult(int *result);
1000 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1001 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1002 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1003
1004 /* Sentinel */
1005 void initSentinelConfig(void);
1006 void initSentinel(void);
1007 void sentinelTimer(void);
1008 char *sentinelHandleConfiguration(char **argv, int argc);
1009
1010 /* Scripting */
1011 void scriptingInit(void);
1012
1013 /* Git SHA1 */
1014 char *redisGitSHA1(void);
1015 char *redisGitDirty(void);
1016
1017 /* Commands prototypes */
1018 void authCommand(redisClient *c);
1019 void pingCommand(redisClient *c);
1020 void echoCommand(redisClient *c);
1021 void setCommand(redisClient *c);
1022 void setnxCommand(redisClient *c);
1023 void setexCommand(redisClient *c);
1024 void psetexCommand(redisClient *c);
1025 void getCommand(redisClient *c);
1026 void delCommand(redisClient *c);
1027 void existsCommand(redisClient *c);
1028 void setbitCommand(redisClient *c);
1029 void getbitCommand(redisClient *c);
1030 void setrangeCommand(redisClient *c);
1031 void getrangeCommand(redisClient *c);
1032 void incrCommand(redisClient *c);
1033 void decrCommand(redisClient *c);
1034 void incrbyCommand(redisClient *c);
1035 void decrbyCommand(redisClient *c);
1036 void incrbyfloatCommand(redisClient *c);
1037 void selectCommand(redisClient *c);
1038 void randomkeyCommand(redisClient *c);
1039 void keysCommand(redisClient *c);
1040 void dbsizeCommand(redisClient *c);
1041 void lastsaveCommand(redisClient *c);
1042 void saveCommand(redisClient *c);
1043 void bgsaveCommand(redisClient *c);
1044 void bgrewriteaofCommand(redisClient *c);
1045 void shutdownCommand(redisClient *c);
1046 void moveCommand(redisClient *c);
1047 void renameCommand(redisClient *c);
1048 void renamenxCommand(redisClient *c);
1049 void lpushCommand(redisClient *c);
1050 void rpushCommand(redisClient *c);
1051 void lpushxCommand(redisClient *c);
1052 void rpushxCommand(redisClient *c);
1053 void linsertCommand(redisClient *c);
1054 void lpopCommand(redisClient *c);
1055 void rpopCommand(redisClient *c);
1056 void llenCommand(redisClient *c);
1057 void lindexCommand(redisClient *c);
1058 void lrangeCommand(redisClient *c);
1059 void ltrimCommand(redisClient *c);
1060 void typeCommand(redisClient *c);
1061 void lsetCommand(redisClient *c);
1062 void saddCommand(redisClient *c);
1063 void sremCommand(redisClient *c);
1064 void smoveCommand(redisClient *c);
1065 void sismemberCommand(redisClient *c);
1066 void scardCommand(redisClient *c);
1067 void spopCommand(redisClient *c);
1068 void srandmemberCommand(redisClient *c);
1069 void sinterCommand(redisClient *c);
1070 void sinterstoreCommand(redisClient *c);
1071 void sunionCommand(redisClient *c);
1072 void sunionstoreCommand(redisClient *c);
1073 void sdiffCommand(redisClient *c);
1074 void sdiffstoreCommand(redisClient *c);
1075 void syncCommand(redisClient *c);
1076 void flushdbCommand(redisClient *c);
1077 void flushallCommand(redisClient *c);
1078 void sortCommand(redisClient *c);
1079 void lremCommand(redisClient *c);
1080 void rpoplpushCommand(redisClient *c);
1081 void infoCommand(redisClient *c);
1082 void mgetCommand(redisClient *c);
1083 void monitorCommand(redisClient *c);
1084 void expireCommand(redisClient *c);
1085 void expireatCommand(redisClient *c);
1086 void pexpireCommand(redisClient *c);
1087 void pexpireatCommand(redisClient *c);
1088 void getsetCommand(redisClient *c);
1089 void ttlCommand(redisClient *c);
1090 void pttlCommand(redisClient *c);
1091 void persistCommand(redisClient *c);
1092 void slaveofCommand(redisClient *c);
1093 void debugCommand(redisClient *c);
1094 void msetCommand(redisClient *c);
1095 void msetnxCommand(redisClient *c);
1096 void zaddCommand(redisClient *c);
1097 void zincrbyCommand(redisClient *c);
1098 void zrangeCommand(redisClient *c);
1099 void zrangebyscoreCommand(redisClient *c);
1100 void zrevrangebyscoreCommand(redisClient *c);
1101 void zcountCommand(redisClient *c);
1102 void zrevrangeCommand(redisClient *c);
1103 void zcardCommand(redisClient *c);
1104 void zremCommand(redisClient *c);
1105 void zscoreCommand(redisClient *c);
1106 void zremrangebyscoreCommand(redisClient *c);
1107 void multiCommand(redisClient *c);
1108 void execCommand(redisClient *c);
1109 void discardCommand(redisClient *c);
1110 void blpopCommand(redisClient *c);
1111 void brpopCommand(redisClient *c);
1112 void brpoplpushCommand(redisClient *c);
1113 void appendCommand(redisClient *c);
1114 void strlenCommand(redisClient *c);
1115 void zrankCommand(redisClient *c);
1116 void zrevrankCommand(redisClient *c);
1117 void hsetCommand(redisClient *c);
1118 void hsetnxCommand(redisClient *c);
1119 void hgetCommand(redisClient *c);
1120 void hmsetCommand(redisClient *c);
1121 void hmgetCommand(redisClient *c);
1122 void hdelCommand(redisClient *c);
1123 void hlenCommand(redisClient *c);
1124 void zremrangebyrankCommand(redisClient *c);
1125 void zunionstoreCommand(redisClient *c);
1126 void zinterstoreCommand(redisClient *c);
1127 void hkeysCommand(redisClient *c);
1128 void hvalsCommand(redisClient *c);
1129 void hgetallCommand(redisClient *c);
1130 void hexistsCommand(redisClient *c);
1131 void configCommand(redisClient *c);
1132 void hincrbyCommand(redisClient *c);
1133 void hincrbyfloatCommand(redisClient *c);
1134 void subscribeCommand(redisClient *c);
1135 void unsubscribeCommand(redisClient *c);
1136 void psubscribeCommand(redisClient *c);
1137 void punsubscribeCommand(redisClient *c);
1138 void publishCommand(redisClient *c);
1139 void watchCommand(redisClient *c);
1140 void unwatchCommand(redisClient *c);
1141 void restoreCommand(redisClient *c);
1142 void migrateCommand(redisClient *c);
1143 void dumpCommand(redisClient *c);
1144 void objectCommand(redisClient *c);
1145 void clientCommand(redisClient *c);
1146 void evalCommand(redisClient *c);
1147 void evalShaCommand(redisClient *c);
1148 void scriptCommand(redisClient *c);
1149 void timeCommand(redisClient *c);
1150 void bitopCommand(redisClient *c);
1151 void bitcountCommand(redisClient *c);
1152 void replconfCommand(redisClient *c);
1153
1154 #if defined(__GNUC__)
1155 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1156 void free(void *ptr) __attribute__ ((deprecated));
1157 void *malloc(size_t size) __attribute__ ((deprecated));
1158 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1159 #endif
1160
1161 /* Debugging stuff */
1162 void _redisAssertWithInfo(redisClient *c, robj *o, char *estr, char *file, int line);
1163 void _redisAssert(char *estr, char *file, int line);
1164 void _redisPanic(char *msg, char *file, int line);
1165 void bugReportStart(void);
1166 void redisLogObjectDebugInfo(robj *o);
1167 void sigsegvHandler(int sig, siginfo_t *info, void *secret);
1168 sds genRedisInfoString(char *section);
1169 void enableWatchdog(int period);
1170 void disableWatchdog(void);
1171 void watchdogScheduleSignal(int period);
1172 void redisLogHexDump(int level, char *descr, void *value, size_t len);
1173
1174 #define redisDebug(fmt, ...) \
1175     printf("DEBUG %s:%d > " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
1176 #define redisDebugMark() \
1177     printf("-- MARK %s:%d --\n", __FILE__, __LINE__)
1178
1179 #endif