| 1 | /* |
| 2 | * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * * Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * * Neither the name of Redis nor the names of its contributors may be used |
| 14 | * to endorse or promote products derived from this software without |
| 15 | * specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 21 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 | * POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "redis.h" |
| 31 | |
| 32 | #ifdef HAVE_BACKTRACE |
| 33 | #include <execinfo.h> |
| 34 | #include <ucontext.h> |
| 35 | #endif /* HAVE_BACKTRACE */ |
| 36 | |
| 37 | #include <time.h> |
| 38 | #include <signal.h> |
| 39 | #include <sys/wait.h> |
| 40 | #include <errno.h> |
| 41 | #include <assert.h> |
| 42 | #include <ctype.h> |
| 43 | #include <stdarg.h> |
| 44 | #include <arpa/inet.h> |
| 45 | #include <sys/stat.h> |
| 46 | #include <fcntl.h> |
| 47 | #include <sys/time.h> |
| 48 | #include <sys/resource.h> |
| 49 | #include <sys/uio.h> |
| 50 | #include <limits.h> |
| 51 | #include <float.h> |
| 52 | #include <math.h> |
| 53 | #include <pthread.h> |
| 54 | #include <sys/resource.h> |
| 55 | |
| 56 | /* Our shared "common" objects */ |
| 57 | |
| 58 | struct sharedObjectsStruct shared; |
| 59 | |
| 60 | /* Global vars that are actally used as constants. The following double |
| 61 | * values are used for double on-disk serialization, and are initialized |
| 62 | * at runtime to avoid strange compiler optimizations. */ |
| 63 | |
| 64 | double R_Zero, R_PosInf, R_NegInf, R_Nan; |
| 65 | |
| 66 | /*================================= Globals ================================= */ |
| 67 | |
| 68 | /* Global vars */ |
| 69 | struct redisServer server; /* server global state */ |
| 70 | struct redisCommand *commandTable; |
| 71 | struct redisCommand redisCommandTable[] = { |
| 72 | {"get",getCommand,2,0,NULL,1,1,1,0,0}, |
| 73 | {"set",setCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0,0,0}, |
| 74 | {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0,0,0}, |
| 75 | {"setex",setexCommand,4,REDIS_CMD_DENYOOM,NULL,0,0,0,0,0}, |
| 76 | {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 77 | {"strlen",strlenCommand,2,0,NULL,1,1,1,0,0}, |
| 78 | {"del",delCommand,-2,0,NULL,0,0,0,0,0}, |
| 79 | {"exists",existsCommand,2,0,NULL,1,1,1,0,0}, |
| 80 | {"setbit",setbitCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 81 | {"getbit",getbitCommand,3,0,NULL,1,1,1,0,0}, |
| 82 | {"setrange",setrangeCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 83 | {"getrange",getrangeCommand,4,0,NULL,1,1,1,0,0}, |
| 84 | {"substr",getrangeCommand,4,0,NULL,1,1,1,0,0}, |
| 85 | {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 86 | {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 87 | {"mget",mgetCommand,-2,0,NULL,1,-1,1,0,0}, |
| 88 | {"rpush",rpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 89 | {"lpush",lpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 90 | {"rpushx",rpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 91 | {"lpushx",lpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 92 | {"linsert",linsertCommand,5,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 93 | {"rpop",rpopCommand,2,0,NULL,1,1,1,0,0}, |
| 94 | {"lpop",lpopCommand,2,0,NULL,1,1,1,0,0}, |
| 95 | {"brpop",brpopCommand,-3,0,NULL,1,1,1,0,0}, |
| 96 | {"brpoplpush",brpoplpushCommand,4,REDIS_CMD_DENYOOM,NULL,1,2,1,0,0}, |
| 97 | {"blpop",blpopCommand,-3,0,NULL,1,1,1,0,0}, |
| 98 | {"llen",llenCommand,2,0,NULL,1,1,1,0,0}, |
| 99 | {"lindex",lindexCommand,3,0,NULL,1,1,1,0,0}, |
| 100 | {"lset",lsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 101 | {"lrange",lrangeCommand,4,0,NULL,1,1,1,0,0}, |
| 102 | {"ltrim",ltrimCommand,4,0,NULL,1,1,1,0,0}, |
| 103 | {"lrem",lremCommand,4,0,NULL,1,1,1,0,0}, |
| 104 | {"rpoplpush",rpoplpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1,0,0}, |
| 105 | {"sadd",saddCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 106 | {"srem",sremCommand,3,0,NULL,1,1,1,0,0}, |
| 107 | {"smove",smoveCommand,4,0,NULL,1,2,1,0,0}, |
| 108 | {"sismember",sismemberCommand,3,0,NULL,1,1,1,0,0}, |
| 109 | {"scard",scardCommand,2,0,NULL,1,1,1,0,0}, |
| 110 | {"spop",spopCommand,2,0,NULL,1,1,1,0,0}, |
| 111 | {"srandmember",srandmemberCommand,2,0,NULL,1,1,1,0,0}, |
| 112 | {"sinter",sinterCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0}, |
| 113 | {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0}, |
| 114 | {"sunion",sunionCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0}, |
| 115 | {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0}, |
| 116 | {"sdiff",sdiffCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1,0,0}, |
| 117 | {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1,0,0}, |
| 118 | {"smembers",sinterCommand,2,0,NULL,1,1,1,0,0}, |
| 119 | {"zadd",zaddCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 120 | {"zincrby",zincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 121 | {"zrem",zremCommand,3,0,NULL,1,1,1,0,0}, |
| 122 | {"zremrangebyscore",zremrangebyscoreCommand,4,0,NULL,1,1,1,0,0}, |
| 123 | {"zremrangebyrank",zremrangebyrankCommand,4,0,NULL,1,1,1,0,0}, |
| 124 | {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0,0,0}, |
| 125 | {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0,0,0}, |
| 126 | {"zrange",zrangeCommand,-4,0,NULL,1,1,1,0,0}, |
| 127 | {"zrangebyscore",zrangebyscoreCommand,-4,0,NULL,1,1,1,0,0}, |
| 128 | {"zrevrangebyscore",zrevrangebyscoreCommand,-4,0,NULL,1,1,1,0,0}, |
| 129 | {"zcount",zcountCommand,4,0,NULL,1,1,1,0,0}, |
| 130 | {"zrevrange",zrevrangeCommand,-4,0,NULL,1,1,1,0,0}, |
| 131 | {"zcard",zcardCommand,2,0,NULL,1,1,1,0,0}, |
| 132 | {"zscore",zscoreCommand,3,0,NULL,1,1,1,0,0}, |
| 133 | {"zrank",zrankCommand,3,0,NULL,1,1,1,0,0}, |
| 134 | {"zrevrank",zrevrankCommand,3,0,NULL,1,1,1,0,0}, |
| 135 | {"hset",hsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 136 | {"hsetnx",hsetnxCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 137 | {"hget",hgetCommand,3,0,NULL,1,1,1,0,0}, |
| 138 | {"hmset",hmsetCommand,-4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 139 | {"hmget",hmgetCommand,-3,0,NULL,1,1,1,0,0}, |
| 140 | {"hincrby",hincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 141 | {"hdel",hdelCommand,3,0,NULL,1,1,1,0,0}, |
| 142 | {"hlen",hlenCommand,2,0,NULL,1,1,1,0,0}, |
| 143 | {"hkeys",hkeysCommand,2,0,NULL,1,1,1,0,0}, |
| 144 | {"hvals",hvalsCommand,2,0,NULL,1,1,1,0,0}, |
| 145 | {"hgetall",hgetallCommand,2,0,NULL,1,1,1,0,0}, |
| 146 | {"hexists",hexistsCommand,3,0,NULL,1,1,1,0,0}, |
| 147 | {"incrby",incrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 148 | {"decrby",decrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 149 | {"getset",getsetCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 150 | {"mset",msetCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2,0,0}, |
| 151 | {"msetnx",msetnxCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2,0,0}, |
| 152 | {"randomkey",randomkeyCommand,1,0,NULL,0,0,0,0,0}, |
| 153 | {"select",selectCommand,2,0,NULL,0,0,0,0,0}, |
| 154 | {"move",moveCommand,3,0,NULL,1,1,1,0,0}, |
| 155 | {"rename",renameCommand,3,0,NULL,1,1,1,0,0}, |
| 156 | {"renamenx",renamenxCommand,3,0,NULL,1,1,1,0,0}, |
| 157 | {"expire",expireCommand,3,0,NULL,0,0,0,0,0}, |
| 158 | {"expireat",expireatCommand,3,0,NULL,0,0,0,0,0}, |
| 159 | {"keys",keysCommand,2,0,NULL,0,0,0,0,0}, |
| 160 | {"dbsize",dbsizeCommand,1,0,NULL,0,0,0,0,0}, |
| 161 | {"auth",authCommand,2,0,NULL,0,0,0,0,0}, |
| 162 | {"ping",pingCommand,1,0,NULL,0,0,0,0,0}, |
| 163 | {"echo",echoCommand,2,0,NULL,0,0,0,0,0}, |
| 164 | {"save",saveCommand,1,0,NULL,0,0,0,0,0}, |
| 165 | {"bgsave",bgsaveCommand,1,0,NULL,0,0,0,0,0}, |
| 166 | {"bgrewriteaof",bgrewriteaofCommand,1,0,NULL,0,0,0,0,0}, |
| 167 | {"shutdown",shutdownCommand,1,0,NULL,0,0,0,0,0}, |
| 168 | {"lastsave",lastsaveCommand,1,0,NULL,0,0,0,0,0}, |
| 169 | {"type",typeCommand,2,0,NULL,1,1,1,0,0}, |
| 170 | {"multi",multiCommand,1,0,NULL,0,0,0,0,0}, |
| 171 | {"exec",execCommand,1,REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0,0,0}, |
| 172 | {"discard",discardCommand,1,0,NULL,0,0,0,0,0}, |
| 173 | {"sync",syncCommand,1,0,NULL,0,0,0,0,0}, |
| 174 | {"flushdb",flushdbCommand,1,0,NULL,0,0,0,0,0}, |
| 175 | {"flushall",flushallCommand,1,0,NULL,0,0,0,0,0}, |
| 176 | {"sort",sortCommand,-2,REDIS_CMD_DENYOOM,NULL,1,1,1,0,0}, |
| 177 | {"info",infoCommand,-1,0,NULL,0,0,0,0,0}, |
| 178 | {"monitor",monitorCommand,1,0,NULL,0,0,0,0,0}, |
| 179 | {"ttl",ttlCommand,2,0,NULL,1,1,1,0,0}, |
| 180 | {"persist",persistCommand,2,0,NULL,1,1,1,0,0}, |
| 181 | {"slaveof",slaveofCommand,3,0,NULL,0,0,0,0,0}, |
| 182 | {"debug",debugCommand,-2,0,NULL,0,0,0,0,0}, |
| 183 | {"config",configCommand,-2,0,NULL,0,0,0,0,0}, |
| 184 | {"subscribe",subscribeCommand,-2,0,NULL,0,0,0,0,0}, |
| 185 | {"unsubscribe",unsubscribeCommand,-1,0,NULL,0,0,0,0,0}, |
| 186 | {"psubscribe",psubscribeCommand,-2,0,NULL,0,0,0,0,0}, |
| 187 | {"punsubscribe",punsubscribeCommand,-1,0,NULL,0,0,0,0,0}, |
| 188 | {"publish",publishCommand,3,REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0,0,0}, |
| 189 | {"watch",watchCommand,-2,0,NULL,0,0,0,0,0}, |
| 190 | {"unwatch",unwatchCommand,1,0,NULL,0,0,0,0,0} |
| 191 | }; |
| 192 | |
| 193 | /*============================ Utility functions ============================ */ |
| 194 | |
| 195 | /* Low level logging. To use only for very big messages, otherwise |
| 196 | * redisLog() is to prefer. */ |
| 197 | void redisLogRaw(int level, const char *msg) { |
| 198 | const int syslogLevelMap[] = { LOG_DEBUG, LOG_INFO, LOG_NOTICE, LOG_WARNING }; |
| 199 | const char *c = ".-*#"; |
| 200 | time_t now = time(NULL); |
| 201 | FILE *fp; |
| 202 | char buf[64]; |
| 203 | |
| 204 | if (level < server.verbosity) return; |
| 205 | |
| 206 | fp = (server.logfile == NULL) ? stdout : fopen(server.logfile,"a"); |
| 207 | if (!fp) return; |
| 208 | |
| 209 | strftime(buf,sizeof(buf),"%d %b %H:%M:%S",localtime(&now)); |
| 210 | fprintf(fp,"[%d] %s %c %s\n",(int)getpid(),buf,c[level],msg); |
| 211 | fflush(fp); |
| 212 | |
| 213 | if (server.logfile) fclose(fp); |
| 214 | |
| 215 | if (server.syslog_enabled) syslog(syslogLevelMap[level], "%s", msg); |
| 216 | } |
| 217 | |
| 218 | /* Like redisLogRaw() but with printf-alike support. This is the funciton that |
| 219 | * is used across the code. The raw version is only used in order to dump |
| 220 | * the INFO output on crash. */ |
| 221 | void redisLog(int level, const char *fmt, ...) { |
| 222 | va_list ap; |
| 223 | char msg[REDIS_MAX_LOGMSG_LEN]; |
| 224 | |
| 225 | if (level < server.verbosity) return; |
| 226 | |
| 227 | va_start(ap, fmt); |
| 228 | vsnprintf(msg, sizeof(msg), fmt, ap); |
| 229 | va_end(ap); |
| 230 | |
| 231 | redisLogRaw(level,msg); |
| 232 | } |
| 233 | |
| 234 | /* Redis generally does not try to recover from out of memory conditions |
| 235 | * when allocating objects or strings, it is not clear if it will be possible |
| 236 | * to report this condition to the client since the networking layer itself |
| 237 | * is based on heap allocation for send buffers, so we simply abort. |
| 238 | * At least the code will be simpler to read... */ |
| 239 | void oom(const char *msg) { |
| 240 | redisLog(REDIS_WARNING, "%s: Out of memory\n",msg); |
| 241 | sleep(1); |
| 242 | abort(); |
| 243 | } |
| 244 | |
| 245 | /* Return the UNIX time in microseconds */ |
| 246 | long long ustime(void) { |
| 247 | struct timeval tv; |
| 248 | long long ust; |
| 249 | |
| 250 | gettimeofday(&tv, NULL); |
| 251 | ust = ((long long)tv.tv_sec)*1000000; |
| 252 | ust += tv.tv_usec; |
| 253 | return ust; |
| 254 | } |
| 255 | |
| 256 | /*====================== Hash table type implementation ==================== */ |
| 257 | |
| 258 | /* This is an hash table type that uses the SDS dynamic strings libary as |
| 259 | * keys and radis objects as values (objects can hold SDS strings, |
| 260 | * lists, sets). */ |
| 261 | |
| 262 | void dictVanillaFree(void *privdata, void *val) |
| 263 | { |
| 264 | DICT_NOTUSED(privdata); |
| 265 | zfree(val); |
| 266 | } |
| 267 | |
| 268 | void dictListDestructor(void *privdata, void *val) |
| 269 | { |
| 270 | DICT_NOTUSED(privdata); |
| 271 | listRelease((list*)val); |
| 272 | } |
| 273 | |
| 274 | int dictSdsKeyCompare(void *privdata, const void *key1, |
| 275 | const void *key2) |
| 276 | { |
| 277 | int l1,l2; |
| 278 | DICT_NOTUSED(privdata); |
| 279 | |
| 280 | l1 = sdslen((sds)key1); |
| 281 | l2 = sdslen((sds)key2); |
| 282 | if (l1 != l2) return 0; |
| 283 | return memcmp(key1, key2, l1) == 0; |
| 284 | } |
| 285 | |
| 286 | /* A case insensitive version used for the command lookup table. */ |
| 287 | int dictSdsKeyCaseCompare(void *privdata, const void *key1, |
| 288 | const void *key2) |
| 289 | { |
| 290 | DICT_NOTUSED(privdata); |
| 291 | |
| 292 | return strcasecmp(key1, key2) == 0; |
| 293 | } |
| 294 | |
| 295 | void dictRedisObjectDestructor(void *privdata, void *val) |
| 296 | { |
| 297 | DICT_NOTUSED(privdata); |
| 298 | |
| 299 | if (val == NULL) return; /* Values of swapped out keys as set to NULL */ |
| 300 | decrRefCount(val); |
| 301 | } |
| 302 | |
| 303 | void dictSdsDestructor(void *privdata, void *val) |
| 304 | { |
| 305 | DICT_NOTUSED(privdata); |
| 306 | |
| 307 | sdsfree(val); |
| 308 | } |
| 309 | |
| 310 | int dictObjKeyCompare(void *privdata, const void *key1, |
| 311 | const void *key2) |
| 312 | { |
| 313 | const robj *o1 = key1, *o2 = key2; |
| 314 | return dictSdsKeyCompare(privdata,o1->ptr,o2->ptr); |
| 315 | } |
| 316 | |
| 317 | unsigned int dictObjHash(const void *key) { |
| 318 | const robj *o = key; |
| 319 | return dictGenHashFunction(o->ptr, sdslen((sds)o->ptr)); |
| 320 | } |
| 321 | |
| 322 | unsigned int dictSdsHash(const void *key) { |
| 323 | return dictGenHashFunction((unsigned char*)key, sdslen((char*)key)); |
| 324 | } |
| 325 | |
| 326 | unsigned int dictSdsCaseHash(const void *key) { |
| 327 | return dictGenCaseHashFunction((unsigned char*)key, sdslen((char*)key)); |
| 328 | } |
| 329 | |
| 330 | int dictEncObjKeyCompare(void *privdata, const void *key1, |
| 331 | const void *key2) |
| 332 | { |
| 333 | robj *o1 = (robj*) key1, *o2 = (robj*) key2; |
| 334 | int cmp; |
| 335 | |
| 336 | if (o1->encoding == REDIS_ENCODING_INT && |
| 337 | o2->encoding == REDIS_ENCODING_INT) |
| 338 | return o1->ptr == o2->ptr; |
| 339 | |
| 340 | o1 = getDecodedObject(o1); |
| 341 | o2 = getDecodedObject(o2); |
| 342 | cmp = dictSdsKeyCompare(privdata,o1->ptr,o2->ptr); |
| 343 | decrRefCount(o1); |
| 344 | decrRefCount(o2); |
| 345 | return cmp; |
| 346 | } |
| 347 | |
| 348 | unsigned int dictEncObjHash(const void *key) { |
| 349 | robj *o = (robj*) key; |
| 350 | |
| 351 | if (o->encoding == REDIS_ENCODING_RAW) { |
| 352 | return dictGenHashFunction(o->ptr, sdslen((sds)o->ptr)); |
| 353 | } else { |
| 354 | if (o->encoding == REDIS_ENCODING_INT) { |
| 355 | char buf[32]; |
| 356 | int len; |
| 357 | |
| 358 | len = ll2string(buf,32,(long)o->ptr); |
| 359 | return dictGenHashFunction((unsigned char*)buf, len); |
| 360 | } else { |
| 361 | unsigned int hash; |
| 362 | |
| 363 | o = getDecodedObject(o); |
| 364 | hash = dictGenHashFunction(o->ptr, sdslen((sds)o->ptr)); |
| 365 | decrRefCount(o); |
| 366 | return hash; |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | /* Sets type and diskstore negative caching hash table */ |
| 372 | dictType setDictType = { |
| 373 | dictEncObjHash, /* hash function */ |
| 374 | NULL, /* key dup */ |
| 375 | NULL, /* val dup */ |
| 376 | dictEncObjKeyCompare, /* key compare */ |
| 377 | dictRedisObjectDestructor, /* key destructor */ |
| 378 | NULL /* val destructor */ |
| 379 | }; |
| 380 | |
| 381 | /* Sorted sets hash (note: a skiplist is used in addition to the hash table) */ |
| 382 | dictType zsetDictType = { |
| 383 | dictEncObjHash, /* hash function */ |
| 384 | NULL, /* key dup */ |
| 385 | NULL, /* val dup */ |
| 386 | dictEncObjKeyCompare, /* key compare */ |
| 387 | dictRedisObjectDestructor, /* key destructor */ |
| 388 | NULL /* val destructor */ |
| 389 | }; |
| 390 | |
| 391 | /* Db->dict, keys are sds strings, vals are Redis objects. */ |
| 392 | dictType dbDictType = { |
| 393 | dictSdsHash, /* hash function */ |
| 394 | NULL, /* key dup */ |
| 395 | NULL, /* val dup */ |
| 396 | dictSdsKeyCompare, /* key compare */ |
| 397 | dictSdsDestructor, /* key destructor */ |
| 398 | dictRedisObjectDestructor /* val destructor */ |
| 399 | }; |
| 400 | |
| 401 | /* Db->expires */ |
| 402 | dictType keyptrDictType = { |
| 403 | dictSdsHash, /* hash function */ |
| 404 | NULL, /* key dup */ |
| 405 | NULL, /* val dup */ |
| 406 | dictSdsKeyCompare, /* key compare */ |
| 407 | NULL, /* key destructor */ |
| 408 | NULL /* val destructor */ |
| 409 | }; |
| 410 | |
| 411 | /* Command table. sds string -> command struct pointer. */ |
| 412 | dictType commandTableDictType = { |
| 413 | dictSdsCaseHash, /* hash function */ |
| 414 | NULL, /* key dup */ |
| 415 | NULL, /* val dup */ |
| 416 | dictSdsKeyCaseCompare, /* key compare */ |
| 417 | dictSdsDestructor, /* key destructor */ |
| 418 | NULL /* val destructor */ |
| 419 | }; |
| 420 | |
| 421 | /* Hash type hash table (note that small hashes are represented with zimpaps) */ |
| 422 | dictType hashDictType = { |
| 423 | dictEncObjHash, /* hash function */ |
| 424 | NULL, /* key dup */ |
| 425 | NULL, /* val dup */ |
| 426 | dictEncObjKeyCompare, /* key compare */ |
| 427 | dictRedisObjectDestructor, /* key destructor */ |
| 428 | dictRedisObjectDestructor /* val destructor */ |
| 429 | }; |
| 430 | |
| 431 | /* Keylist hash table type has unencoded redis objects as keys and |
| 432 | * lists as values. It's used for blocking operations (BLPOP) and to |
| 433 | * map swapped keys to a list of clients waiting for this keys to be loaded. */ |
| 434 | dictType keylistDictType = { |
| 435 | dictObjHash, /* hash function */ |
| 436 | NULL, /* key dup */ |
| 437 | NULL, /* val dup */ |
| 438 | dictObjKeyCompare, /* key compare */ |
| 439 | dictRedisObjectDestructor, /* key destructor */ |
| 440 | dictListDestructor /* val destructor */ |
| 441 | }; |
| 442 | |
| 443 | int htNeedsResize(dict *dict) { |
| 444 | long long size, used; |
| 445 | |
| 446 | size = dictSlots(dict); |
| 447 | used = dictSize(dict); |
| 448 | return (size && used && size > DICT_HT_INITIAL_SIZE && |
| 449 | (used*100/size < REDIS_HT_MINFILL)); |
| 450 | } |
| 451 | |
| 452 | /* If the percentage of used slots in the HT reaches REDIS_HT_MINFILL |
| 453 | * we resize the hash table to save memory */ |
| 454 | void tryResizeHashTables(void) { |
| 455 | int j; |
| 456 | |
| 457 | for (j = 0; j < server.dbnum; j++) { |
| 458 | if (htNeedsResize(server.db[j].dict)) |
| 459 | dictResize(server.db[j].dict); |
| 460 | if (htNeedsResize(server.db[j].expires)) |
| 461 | dictResize(server.db[j].expires); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | /* Our hash table implementation performs rehashing incrementally while |
| 466 | * we write/read from the hash table. Still if the server is idle, the hash |
| 467 | * table will use two tables for a long time. So we try to use 1 millisecond |
| 468 | * of CPU time at every serverCron() loop in order to rehash some key. */ |
| 469 | void incrementallyRehash(void) { |
| 470 | int j; |
| 471 | |
| 472 | for (j = 0; j < server.dbnum; j++) { |
| 473 | if (dictIsRehashing(server.db[j].dict)) { |
| 474 | dictRehashMilliseconds(server.db[j].dict,1); |
| 475 | break; /* already used our millisecond for this loop... */ |
| 476 | } |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | /* This function is called once a background process of some kind terminates, |
| 481 | * as we want to avoid resizing the hash tables when there is a child in order |
| 482 | * to play well with copy-on-write (otherwise when a resize happens lots of |
| 483 | * memory pages are copied). The goal of this function is to update the ability |
| 484 | * for dict.c to resize the hash tables accordingly to the fact we have o not |
| 485 | * running childs. */ |
| 486 | void updateDictResizePolicy(void) { |
| 487 | if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1) |
| 488 | dictEnableResize(); |
| 489 | else |
| 490 | dictDisableResize(); |
| 491 | } |
| 492 | |
| 493 | /* ======================= Cron: called every 100 ms ======================== */ |
| 494 | |
| 495 | /* Try to expire a few timed out keys. The algorithm used is adaptive and |
| 496 | * will use few CPU cycles if there are few expiring keys, otherwise |
| 497 | * it will get more aggressive to avoid that too much memory is used by |
| 498 | * keys that can be removed from the keyspace. */ |
| 499 | void activeExpireCycle(void) { |
| 500 | int j; |
| 501 | |
| 502 | for (j = 0; j < server.dbnum; j++) { |
| 503 | int expired; |
| 504 | redisDb *db = server.db+j; |
| 505 | |
| 506 | /* Continue to expire if at the end of the cycle more than 25% |
| 507 | * of the keys were expired. */ |
| 508 | do { |
| 509 | long num = dictSize(db->expires); |
| 510 | time_t now = time(NULL); |
| 511 | |
| 512 | expired = 0; |
| 513 | if (num > REDIS_EXPIRELOOKUPS_PER_CRON) |
| 514 | num = REDIS_EXPIRELOOKUPS_PER_CRON; |
| 515 | while (num--) { |
| 516 | dictEntry *de; |
| 517 | time_t t; |
| 518 | |
| 519 | if ((de = dictGetRandomKey(db->expires)) == NULL) break; |
| 520 | t = (time_t) dictGetEntryVal(de); |
| 521 | if (now > t) { |
| 522 | sds key = dictGetEntryKey(de); |
| 523 | robj *keyobj = createStringObject(key,sdslen(key)); |
| 524 | |
| 525 | propagateExpire(db,keyobj); |
| 526 | dbDelete(db,keyobj); |
| 527 | decrRefCount(keyobj); |
| 528 | expired++; |
| 529 | server.stat_expiredkeys++; |
| 530 | } |
| 531 | } |
| 532 | } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | void updateLRUClock(void) { |
| 537 | server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) & |
| 538 | REDIS_LRU_CLOCK_MAX; |
| 539 | } |
| 540 | |
| 541 | int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) { |
| 542 | int j, loops = server.cronloops; |
| 543 | REDIS_NOTUSED(eventLoop); |
| 544 | REDIS_NOTUSED(id); |
| 545 | REDIS_NOTUSED(clientData); |
| 546 | |
| 547 | /* We take a cached value of the unix time in the global state because |
| 548 | * with virtual memory and aging there is to store the current time |
| 549 | * in objects at every object access, and accuracy is not needed. |
| 550 | * To access a global var is faster than calling time(NULL) */ |
| 551 | server.unixtime = time(NULL); |
| 552 | /* We have just 22 bits per object for LRU information. |
| 553 | * So we use an (eventually wrapping) LRU clock with 10 seconds resolution. |
| 554 | * 2^22 bits with 10 seconds resoluton is more or less 1.5 years. |
| 555 | * |
| 556 | * Note that even if this will wrap after 1.5 years it's not a problem, |
| 557 | * everything will still work but just some object will appear younger |
| 558 | * to Redis. But for this to happen a given object should never be touched |
| 559 | * for 1.5 years. |
| 560 | * |
| 561 | * Note that you can change the resolution altering the |
| 562 | * REDIS_LRU_CLOCK_RESOLUTION define. |
| 563 | */ |
| 564 | updateLRUClock(); |
| 565 | |
| 566 | /* We received a SIGTERM, shutting down here in a safe way, as it is |
| 567 | * not ok doing so inside the signal handler. */ |
| 568 | if (server.shutdown_asap) { |
| 569 | if (prepareForShutdown() == REDIS_OK) exit(0); |
| 570 | redisLog(REDIS_WARNING,"SIGTERM received but errors trying to shut down the server, check the logs for more information"); |
| 571 | } |
| 572 | |
| 573 | /* Show some info about non-empty databases */ |
| 574 | for (j = 0; j < server.dbnum; j++) { |
| 575 | long long size, used, vkeys; |
| 576 | |
| 577 | size = dictSlots(server.db[j].dict); |
| 578 | used = dictSize(server.db[j].dict); |
| 579 | vkeys = dictSize(server.db[j].expires); |
| 580 | if (!(loops % 50) && (used || vkeys)) { |
| 581 | redisLog(REDIS_VERBOSE,"DB %d: %lld keys (%lld volatile) in %lld slots HT.",j,used,vkeys,size); |
| 582 | /* dictPrintStats(server.dict); */ |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /* We don't want to resize the hash tables while a bacground saving |
| 587 | * is in progress: the saving child is created using fork() that is |
| 588 | * implemented with a copy-on-write semantic in most modern systems, so |
| 589 | * if we resize the HT while there is the saving child at work actually |
| 590 | * a lot of memory movements in the parent will cause a lot of pages |
| 591 | * copied. */ |
| 592 | if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1) { |
| 593 | if (!(loops % 10)) tryResizeHashTables(); |
| 594 | if (server.activerehashing) incrementallyRehash(); |
| 595 | } |
| 596 | |
| 597 | /* Show information about connected clients */ |
| 598 | if (!(loops % 50)) { |
| 599 | redisLog(REDIS_VERBOSE,"%d clients connected (%d slaves), %zu bytes in use", |
| 600 | listLength(server.clients)-listLength(server.slaves), |
| 601 | listLength(server.slaves), |
| 602 | zmalloc_used_memory()); |
| 603 | } |
| 604 | |
| 605 | /* Close connections of timedout clients */ |
| 606 | if ((server.maxidletime && !(loops % 100)) || server.bpop_blocked_clients) |
| 607 | closeTimedoutClients(); |
| 608 | |
| 609 | /* Check if a background saving or AOF rewrite in progress terminated. */ |
| 610 | if (server.bgsavechildpid != -1 || server.bgrewritechildpid != -1) { |
| 611 | int statloc; |
| 612 | pid_t pid; |
| 613 | |
| 614 | if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) { |
| 615 | int exitcode = WEXITSTATUS(statloc); |
| 616 | int bysignal = 0; |
| 617 | |
| 618 | if (WIFSIGNALED(statloc)) bysignal = WTERMSIG(statloc); |
| 619 | |
| 620 | if (pid == server.bgsavechildpid) { |
| 621 | backgroundSaveDoneHandler(exitcode,bysignal); |
| 622 | } else { |
| 623 | backgroundRewriteDoneHandler(exitcode,bysignal); |
| 624 | } |
| 625 | updateDictResizePolicy(); |
| 626 | } |
| 627 | } else if (server.bgsavethread != (pthread_t) -1) { |
| 628 | if (server.bgsavethread != (pthread_t) -1) { |
| 629 | int state; |
| 630 | |
| 631 | pthread_mutex_lock(&server.bgsavethread_mutex); |
| 632 | state = server.bgsavethread_state; |
| 633 | pthread_mutex_unlock(&server.bgsavethread_mutex); |
| 634 | |
| 635 | if (state == REDIS_BGSAVE_THREAD_DONE_OK || |
| 636 | state == REDIS_BGSAVE_THREAD_DONE_ERR) |
| 637 | { |
| 638 | backgroundSaveDoneHandler( |
| 639 | (state == REDIS_BGSAVE_THREAD_DONE_OK) ? 0 : 1, 0); |
| 640 | } |
| 641 | } |
| 642 | } else if (!server.ds_enabled) { |
| 643 | /* If there is not a background saving in progress check if |
| 644 | * we have to save now */ |
| 645 | time_t now = time(NULL); |
| 646 | for (j = 0; j < server.saveparamslen; j++) { |
| 647 | struct saveparam *sp = server.saveparams+j; |
| 648 | |
| 649 | if (server.dirty >= sp->changes && |
| 650 | now-server.lastsave > sp->seconds) { |
| 651 | redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...", |
| 652 | sp->changes, sp->seconds); |
| 653 | rdbSaveBackground(server.dbfilename); |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | /* Expire a few keys per cycle, only if this is a master. |
| 660 | * On slaves we wait for DEL operations synthesized by the master |
| 661 | * in order to guarantee a strict consistency. */ |
| 662 | if (server.masterhost == NULL) activeExpireCycle(); |
| 663 | |
| 664 | /* Remove a few cached objects from memory if we are over the |
| 665 | * configured memory limit */ |
| 666 | if (server.ds_enabled) cacheCron(); |
| 667 | |
| 668 | /* Replication cron function -- used to reconnect to master and |
| 669 | * to detect transfer failures. */ |
| 670 | if (!(loops % 10)) replicationCron(); |
| 671 | |
| 672 | server.cronloops++; |
| 673 | return 100; |
| 674 | } |
| 675 | |
| 676 | /* This function gets called every time Redis is entering the |
| 677 | * main loop of the event driven library, that is, before to sleep |
| 678 | * for ready file descriptors. */ |
| 679 | void beforeSleep(struct aeEventLoop *eventLoop) { |
| 680 | REDIS_NOTUSED(eventLoop); |
| 681 | listNode *ln; |
| 682 | redisClient *c; |
| 683 | |
| 684 | /* Awake clients that got all the on disk keys they requested */ |
| 685 | if (server.ds_enabled && listLength(server.io_ready_clients)) { |
| 686 | listIter li; |
| 687 | |
| 688 | listRewind(server.io_ready_clients,&li); |
| 689 | while((ln = listNext(&li))) { |
| 690 | c = ln->value; |
| 691 | struct redisCommand *cmd; |
| 692 | |
| 693 | /* Resume the client. */ |
| 694 | listDelNode(server.io_ready_clients,ln); |
| 695 | c->flags &= (~REDIS_IO_WAIT); |
| 696 | server.cache_blocked_clients--; |
| 697 | aeCreateFileEvent(server.el, c->fd, AE_READABLE, |
| 698 | readQueryFromClient, c); |
| 699 | cmd = lookupCommand(c->argv[0]->ptr); |
| 700 | redisAssert(cmd != NULL); |
| 701 | call(c,cmd); |
| 702 | resetClient(c); |
| 703 | /* There may be more data to process in the input buffer. */ |
| 704 | if (c->querybuf && sdslen(c->querybuf) > 0) |
| 705 | processInputBuffer(c); |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | /* Try to process pending commands for clients that were just unblocked. */ |
| 710 | while (listLength(server.unblocked_clients)) { |
| 711 | ln = listFirst(server.unblocked_clients); |
| 712 | redisAssert(ln != NULL); |
| 713 | c = ln->value; |
| 714 | listDelNode(server.unblocked_clients,ln); |
| 715 | c->flags &= ~REDIS_UNBLOCKED; |
| 716 | |
| 717 | /* Process remaining data in the input buffer. */ |
| 718 | if (c->querybuf && sdslen(c->querybuf) > 0) |
| 719 | processInputBuffer(c); |
| 720 | } |
| 721 | |
| 722 | /* Write the AOF buffer on disk */ |
| 723 | flushAppendOnlyFile(); |
| 724 | } |
| 725 | |
| 726 | /* =========================== Server initialization ======================== */ |
| 727 | |
| 728 | void createSharedObjects(void) { |
| 729 | int j; |
| 730 | |
| 731 | shared.crlf = createObject(REDIS_STRING,sdsnew("\r\n")); |
| 732 | shared.ok = createObject(REDIS_STRING,sdsnew("+OK\r\n")); |
| 733 | shared.err = createObject(REDIS_STRING,sdsnew("-ERR\r\n")); |
| 734 | shared.emptybulk = createObject(REDIS_STRING,sdsnew("$0\r\n\r\n")); |
| 735 | shared.czero = createObject(REDIS_STRING,sdsnew(":0\r\n")); |
| 736 | shared.cone = createObject(REDIS_STRING,sdsnew(":1\r\n")); |
| 737 | shared.cnegone = createObject(REDIS_STRING,sdsnew(":-1\r\n")); |
| 738 | shared.nullbulk = createObject(REDIS_STRING,sdsnew("$-1\r\n")); |
| 739 | shared.nullmultibulk = createObject(REDIS_STRING,sdsnew("*-1\r\n")); |
| 740 | shared.emptymultibulk = createObject(REDIS_STRING,sdsnew("*0\r\n")); |
| 741 | shared.pong = createObject(REDIS_STRING,sdsnew("+PONG\r\n")); |
| 742 | shared.queued = createObject(REDIS_STRING,sdsnew("+QUEUED\r\n")); |
| 743 | shared.wrongtypeerr = createObject(REDIS_STRING,sdsnew( |
| 744 | "-ERR Operation against a key holding the wrong kind of value\r\n")); |
| 745 | shared.nokeyerr = createObject(REDIS_STRING,sdsnew( |
| 746 | "-ERR no such key\r\n")); |
| 747 | shared.syntaxerr = createObject(REDIS_STRING,sdsnew( |
| 748 | "-ERR syntax error\r\n")); |
| 749 | shared.sameobjecterr = createObject(REDIS_STRING,sdsnew( |
| 750 | "-ERR source and destination objects are the same\r\n")); |
| 751 | shared.outofrangeerr = createObject(REDIS_STRING,sdsnew( |
| 752 | "-ERR index out of range\r\n")); |
| 753 | shared.loadingerr = createObject(REDIS_STRING,sdsnew( |
| 754 | "-LOADING Redis is loading the dataset in memory\r\n")); |
| 755 | shared.space = createObject(REDIS_STRING,sdsnew(" ")); |
| 756 | shared.colon = createObject(REDIS_STRING,sdsnew(":")); |
| 757 | shared.plus = createObject(REDIS_STRING,sdsnew("+")); |
| 758 | shared.select0 = createStringObject("select 0\r\n",10); |
| 759 | shared.select1 = createStringObject("select 1\r\n",10); |
| 760 | shared.select2 = createStringObject("select 2\r\n",10); |
| 761 | shared.select3 = createStringObject("select 3\r\n",10); |
| 762 | shared.select4 = createStringObject("select 4\r\n",10); |
| 763 | shared.select5 = createStringObject("select 5\r\n",10); |
| 764 | shared.select6 = createStringObject("select 6\r\n",10); |
| 765 | shared.select7 = createStringObject("select 7\r\n",10); |
| 766 | shared.select8 = createStringObject("select 8\r\n",10); |
| 767 | shared.select9 = createStringObject("select 9\r\n",10); |
| 768 | shared.messagebulk = createStringObject("$7\r\nmessage\r\n",13); |
| 769 | shared.pmessagebulk = createStringObject("$8\r\npmessage\r\n",14); |
| 770 | shared.subscribebulk = createStringObject("$9\r\nsubscribe\r\n",15); |
| 771 | shared.unsubscribebulk = createStringObject("$11\r\nunsubscribe\r\n",18); |
| 772 | shared.psubscribebulk = createStringObject("$10\r\npsubscribe\r\n",17); |
| 773 | shared.punsubscribebulk = createStringObject("$12\r\npunsubscribe\r\n",19); |
| 774 | shared.mbulk3 = createStringObject("*3\r\n",4); |
| 775 | shared.mbulk4 = createStringObject("*4\r\n",4); |
| 776 | for (j = 0; j < REDIS_SHARED_INTEGERS; j++) { |
| 777 | shared.integers[j] = createObject(REDIS_STRING,(void*)(long)j); |
| 778 | shared.integers[j]->encoding = REDIS_ENCODING_INT; |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | void initServerConfig() { |
| 783 | server.port = REDIS_SERVERPORT; |
| 784 | server.bindaddr = NULL; |
| 785 | server.unixsocket = NULL; |
| 786 | server.ipfd = -1; |
| 787 | server.sofd = -1; |
| 788 | server.dbnum = REDIS_DEFAULT_DBNUM; |
| 789 | server.verbosity = REDIS_VERBOSE; |
| 790 | server.maxidletime = REDIS_MAXIDLETIME; |
| 791 | server.saveparams = NULL; |
| 792 | server.loading = 0; |
| 793 | server.logfile = NULL; /* NULL = log on standard output */ |
| 794 | server.syslog_enabled = 0; |
| 795 | server.syslog_ident = zstrdup("redis"); |
| 796 | server.syslog_facility = LOG_LOCAL0; |
| 797 | server.daemonize = 0; |
| 798 | server.appendonly = 0; |
| 799 | server.appendfsync = APPENDFSYNC_EVERYSEC; |
| 800 | server.no_appendfsync_on_rewrite = 0; |
| 801 | server.lastfsync = time(NULL); |
| 802 | server.appendfd = -1; |
| 803 | server.appendseldb = -1; /* Make sure the first time will not match */ |
| 804 | server.pidfile = zstrdup("/var/run/redis.pid"); |
| 805 | server.dbfilename = zstrdup("dump.rdb"); |
| 806 | server.appendfilename = zstrdup("appendonly.aof"); |
| 807 | server.requirepass = NULL; |
| 808 | server.rdbcompression = 1; |
| 809 | server.activerehashing = 1; |
| 810 | server.maxclients = 0; |
| 811 | server.bpop_blocked_clients = 0; |
| 812 | server.maxmemory = 0; |
| 813 | server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU; |
| 814 | server.maxmemory_samples = 3; |
| 815 | server.ds_enabled = 0; |
| 816 | server.ds_path = sdsnew("/tmp/redis.ds"); |
| 817 | server.cache_max_memory = 64LL*1024*1024; /* 64 MB of RAM */ |
| 818 | server.cache_blocked_clients = 0; |
| 819 | server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES; |
| 820 | server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE; |
| 821 | server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES; |
| 822 | server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE; |
| 823 | server.set_max_intset_entries = REDIS_SET_MAX_INTSET_ENTRIES; |
| 824 | server.shutdown_asap = 0; |
| 825 | server.cache_flush_delay = 0; |
| 826 | |
| 827 | updateLRUClock(); |
| 828 | resetServerSaveParams(); |
| 829 | |
| 830 | appendServerSaveParams(60*60,1); /* save after 1 hour and 1 change */ |
| 831 | appendServerSaveParams(300,100); /* save after 5 minutes and 100 changes */ |
| 832 | appendServerSaveParams(60,10000); /* save after 1 minute and 10000 changes */ |
| 833 | /* Replication related */ |
| 834 | server.isslave = 0; |
| 835 | server.masterauth = NULL; |
| 836 | server.masterhost = NULL; |
| 837 | server.masterport = 6379; |
| 838 | server.master = NULL; |
| 839 | server.replstate = REDIS_REPL_NONE; |
| 840 | server.repl_serve_stale_data = 1; |
| 841 | |
| 842 | /* Double constants initialization */ |
| 843 | R_Zero = 0.0; |
| 844 | R_PosInf = 1.0/R_Zero; |
| 845 | R_NegInf = -1.0/R_Zero; |
| 846 | R_Nan = R_Zero/R_Zero; |
| 847 | |
| 848 | /* Command table -- we intiialize it here as it is part of the |
| 849 | * initial configuration, since command names may be changed via |
| 850 | * redis.conf using the rename-command directive. */ |
| 851 | server.commands = dictCreate(&commandTableDictType,NULL); |
| 852 | populateCommandTable(); |
| 853 | server.delCommand = lookupCommandByCString("del"); |
| 854 | server.multiCommand = lookupCommandByCString("multi"); |
| 855 | } |
| 856 | |
| 857 | void initServer() { |
| 858 | int j; |
| 859 | |
| 860 | signal(SIGHUP, SIG_IGN); |
| 861 | signal(SIGPIPE, SIG_IGN); |
| 862 | setupSigSegvAction(); |
| 863 | |
| 864 | if (server.syslog_enabled) { |
| 865 | openlog(server.syslog_ident, LOG_PID | LOG_NDELAY | LOG_NOWAIT, |
| 866 | server.syslog_facility); |
| 867 | } |
| 868 | |
| 869 | server.mainthread = pthread_self(); |
| 870 | server.clients = listCreate(); |
| 871 | server.slaves = listCreate(); |
| 872 | server.monitors = listCreate(); |
| 873 | server.unblocked_clients = listCreate(); |
| 874 | server.cache_io_queue = listCreate(); |
| 875 | |
| 876 | createSharedObjects(); |
| 877 | server.el = aeCreateEventLoop(); |
| 878 | server.db = zmalloc(sizeof(redisDb)*server.dbnum); |
| 879 | |
| 880 | if (server.port != 0) { |
| 881 | server.ipfd = anetTcpServer(server.neterr,server.port,server.bindaddr); |
| 882 | if (server.ipfd == ANET_ERR) { |
| 883 | redisLog(REDIS_WARNING, "Opening port: %s", server.neterr); |
| 884 | exit(1); |
| 885 | } |
| 886 | } |
| 887 | if (server.unixsocket != NULL) { |
| 888 | unlink(server.unixsocket); /* don't care if this fails */ |
| 889 | server.sofd = anetUnixServer(server.neterr,server.unixsocket); |
| 890 | if (server.sofd == ANET_ERR) { |
| 891 | redisLog(REDIS_WARNING, "Opening socket: %s", server.neterr); |
| 892 | exit(1); |
| 893 | } |
| 894 | } |
| 895 | if (server.ipfd < 0 && server.sofd < 0) { |
| 896 | redisLog(REDIS_WARNING, "Configured to not listen anywhere, exiting."); |
| 897 | exit(1); |
| 898 | } |
| 899 | for (j = 0; j < server.dbnum; j++) { |
| 900 | server.db[j].dict = dictCreate(&dbDictType,NULL); |
| 901 | server.db[j].expires = dictCreate(&keyptrDictType,NULL); |
| 902 | server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL); |
| 903 | server.db[j].watched_keys = dictCreate(&keylistDictType,NULL); |
| 904 | if (server.ds_enabled) { |
| 905 | server.db[j].io_keys = dictCreate(&keylistDictType,NULL); |
| 906 | server.db[j].io_negcache = dictCreate(&setDictType,NULL); |
| 907 | server.db[j].io_queued = dictCreate(&setDictType,NULL); |
| 908 | } |
| 909 | server.db[j].id = j; |
| 910 | } |
| 911 | server.pubsub_channels = dictCreate(&keylistDictType,NULL); |
| 912 | server.pubsub_patterns = listCreate(); |
| 913 | listSetFreeMethod(server.pubsub_patterns,freePubsubPattern); |
| 914 | listSetMatchMethod(server.pubsub_patterns,listMatchPubsubPattern); |
| 915 | server.cronloops = 0; |
| 916 | server.bgsavechildpid = -1; |
| 917 | server.bgrewritechildpid = -1; |
| 918 | server.bgsavethread_state = REDIS_BGSAVE_THREAD_UNACTIVE; |
| 919 | server.bgsavethread = (pthread_t) -1; |
| 920 | server.bgrewritebuf = sdsempty(); |
| 921 | server.aofbuf = sdsempty(); |
| 922 | server.lastsave = time(NULL); |
| 923 | server.dirty = 0; |
| 924 | server.stat_numcommands = 0; |
| 925 | server.stat_numconnections = 0; |
| 926 | server.stat_expiredkeys = 0; |
| 927 | server.stat_evictedkeys = 0; |
| 928 | server.stat_starttime = time(NULL); |
| 929 | server.stat_keyspace_misses = 0; |
| 930 | server.stat_keyspace_hits = 0; |
| 931 | server.unixtime = time(NULL); |
| 932 | aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL); |
| 933 | if (server.ipfd > 0 && aeCreateFileEvent(server.el,server.ipfd,AE_READABLE, |
| 934 | acceptTcpHandler,NULL) == AE_ERR) oom("creating file event"); |
| 935 | if (server.sofd > 0 && aeCreateFileEvent(server.el,server.sofd,AE_READABLE, |
| 936 | acceptUnixHandler,NULL) == AE_ERR) oom("creating file event"); |
| 937 | |
| 938 | if (server.appendonly) { |
| 939 | server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644); |
| 940 | if (server.appendfd == -1) { |
| 941 | redisLog(REDIS_WARNING, "Can't open the append-only file: %s", |
| 942 | strerror(errno)); |
| 943 | exit(1); |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | if (server.ds_enabled) dsInit(); |
| 948 | srand(time(NULL)^getpid()); |
| 949 | } |
| 950 | |
| 951 | /* Populates the Redis Command Table starting from the hard coded list |
| 952 | * we have on top of redis.c file. */ |
| 953 | void populateCommandTable(void) { |
| 954 | int j; |
| 955 | int numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand); |
| 956 | |
| 957 | for (j = 0; j < numcommands; j++) { |
| 958 | struct redisCommand *c = redisCommandTable+j; |
| 959 | int retval; |
| 960 | |
| 961 | retval = dictAdd(server.commands, sdsnew(c->name), c); |
| 962 | assert(retval == DICT_OK); |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | void resetCommandTableStats(void) { |
| 967 | int numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand); |
| 968 | int j; |
| 969 | |
| 970 | for (j = 0; j < numcommands; j++) { |
| 971 | struct redisCommand *c = redisCommandTable+j; |
| 972 | |
| 973 | c->microseconds = 0; |
| 974 | c->calls = 0; |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | /* ====================== Commands lookup and execution ===================== */ |
| 979 | |
| 980 | struct redisCommand *lookupCommand(sds name) { |
| 981 | return dictFetchValue(server.commands, name); |
| 982 | } |
| 983 | |
| 984 | struct redisCommand *lookupCommandByCString(char *s) { |
| 985 | struct redisCommand *cmd; |
| 986 | sds name = sdsnew(s); |
| 987 | |
| 988 | cmd = dictFetchValue(server.commands, name); |
| 989 | sdsfree(name); |
| 990 | return cmd; |
| 991 | } |
| 992 | |
| 993 | /* Call() is the core of Redis execution of a command */ |
| 994 | void call(redisClient *c, struct redisCommand *cmd) { |
| 995 | long long dirty, start = ustime(); |
| 996 | |
| 997 | dirty = server.dirty; |
| 998 | cmd->proc(c); |
| 999 | dirty = server.dirty-dirty; |
| 1000 | cmd->microseconds += ustime()-start; |
| 1001 | cmd->calls++; |
| 1002 | |
| 1003 | if (server.appendonly && dirty) |
| 1004 | feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc); |
| 1005 | if ((dirty || cmd->flags & REDIS_CMD_FORCE_REPLICATION) && |
| 1006 | listLength(server.slaves)) |
| 1007 | replicationFeedSlaves(server.slaves,c->db->id,c->argv,c->argc); |
| 1008 | if (listLength(server.monitors)) |
| 1009 | replicationFeedMonitors(server.monitors,c->db->id,c->argv,c->argc); |
| 1010 | server.stat_numcommands++; |
| 1011 | } |
| 1012 | |
| 1013 | /* If this function gets called we already read a whole |
| 1014 | * command, argments are in the client argv/argc fields. |
| 1015 | * processCommand() execute the command or prepare the |
| 1016 | * server for a bulk read from the client. |
| 1017 | * |
| 1018 | * If 1 is returned the client is still alive and valid and |
| 1019 | * and other operations can be performed by the caller. Otherwise |
| 1020 | * if 0 is returned the client was destroied (i.e. after QUIT). */ |
| 1021 | int processCommand(redisClient *c) { |
| 1022 | struct redisCommand *cmd; |
| 1023 | |
| 1024 | /* The QUIT command is handled separately. Normal command procs will |
| 1025 | * go through checking for replication and QUIT will cause trouble |
| 1026 | * when FORCE_REPLICATION is enabled and would be implemented in |
| 1027 | * a regular command proc. */ |
| 1028 | if (!strcasecmp(c->argv[0]->ptr,"quit")) { |
| 1029 | addReply(c,shared.ok); |
| 1030 | c->flags |= REDIS_CLOSE_AFTER_REPLY; |
| 1031 | return REDIS_ERR; |
| 1032 | } |
| 1033 | |
| 1034 | /* Now lookup the command and check ASAP about trivial error conditions |
| 1035 | * such wrong arity, bad command name and so forth. */ |
| 1036 | cmd = lookupCommand(c->argv[0]->ptr); |
| 1037 | if (!cmd) { |
| 1038 | addReplyErrorFormat(c,"unknown command '%s'", |
| 1039 | (char*)c->argv[0]->ptr); |
| 1040 | return REDIS_OK; |
| 1041 | } else if ((cmd->arity > 0 && cmd->arity != c->argc) || |
| 1042 | (c->argc < -cmd->arity)) { |
| 1043 | addReplyErrorFormat(c,"wrong number of arguments for '%s' command", |
| 1044 | cmd->name); |
| 1045 | return REDIS_OK; |
| 1046 | } |
| 1047 | |
| 1048 | /* Check if the user is authenticated */ |
| 1049 | if (server.requirepass && !c->authenticated && cmd->proc != authCommand) { |
| 1050 | addReplyError(c,"operation not permitted"); |
| 1051 | return REDIS_OK; |
| 1052 | } |
| 1053 | |
| 1054 | /* Handle the maxmemory directive. |
| 1055 | * |
| 1056 | * First we try to free some memory if possible (if there are volatile |
| 1057 | * keys in the dataset). If there are not the only thing we can do |
| 1058 | * is returning an error. */ |
| 1059 | if (server.maxmemory) freeMemoryIfNeeded(); |
| 1060 | if (server.maxmemory && (cmd->flags & REDIS_CMD_DENYOOM) && |
| 1061 | zmalloc_used_memory() > server.maxmemory) |
| 1062 | { |
| 1063 | addReplyError(c,"command not allowed when used memory > 'maxmemory'"); |
| 1064 | return REDIS_OK; |
| 1065 | } |
| 1066 | |
| 1067 | /* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */ |
| 1068 | if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0) |
| 1069 | && |
| 1070 | cmd->proc != subscribeCommand && cmd->proc != unsubscribeCommand && |
| 1071 | cmd->proc != psubscribeCommand && cmd->proc != punsubscribeCommand) { |
| 1072 | addReplyError(c,"only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context"); |
| 1073 | return REDIS_OK; |
| 1074 | } |
| 1075 | |
| 1076 | /* Only allow INFO and SLAVEOF when slave-serve-stale-data is no and |
| 1077 | * we are a slave with a broken link with master. */ |
| 1078 | if (server.masterhost && server.replstate != REDIS_REPL_CONNECTED && |
| 1079 | server.repl_serve_stale_data == 0 && |
| 1080 | cmd->proc != infoCommand && cmd->proc != slaveofCommand) |
| 1081 | { |
| 1082 | addReplyError(c, |
| 1083 | "link with MASTER is down and slave-serve-stale-data is set to no"); |
| 1084 | return REDIS_OK; |
| 1085 | } |
| 1086 | |
| 1087 | /* Loading DB? Return an error if the command is not INFO */ |
| 1088 | if (server.loading && cmd->proc != infoCommand) { |
| 1089 | addReply(c, shared.loadingerr); |
| 1090 | return REDIS_OK; |
| 1091 | } |
| 1092 | |
| 1093 | /* Exec the command */ |
| 1094 | if (c->flags & REDIS_MULTI && |
| 1095 | cmd->proc != execCommand && cmd->proc != discardCommand && |
| 1096 | cmd->proc != multiCommand && cmd->proc != watchCommand) |
| 1097 | { |
| 1098 | queueMultiCommand(c,cmd); |
| 1099 | addReply(c,shared.queued); |
| 1100 | } else { |
| 1101 | if (server.ds_enabled && blockClientOnSwappedKeys(c,cmd)) |
| 1102 | return REDIS_ERR; |
| 1103 | call(c,cmd); |
| 1104 | } |
| 1105 | return REDIS_OK; |
| 1106 | } |
| 1107 | |
| 1108 | /*================================== Shutdown =============================== */ |
| 1109 | |
| 1110 | int prepareForShutdown() { |
| 1111 | redisLog(REDIS_WARNING,"User requested shutdown, saving DB..."); |
| 1112 | /* Kill the saving child if there is a background saving in progress. |
| 1113 | We want to avoid race conditions, for instance our saving child may |
| 1114 | overwrite the synchronous saving did by SHUTDOWN. */ |
| 1115 | if (server.bgsavechildpid != -1) { |
| 1116 | redisLog(REDIS_WARNING,"There is a live saving child. Killing it!"); |
| 1117 | kill(server.bgsavechildpid,SIGKILL); |
| 1118 | rdbRemoveTempFile(server.bgsavechildpid); |
| 1119 | } |
| 1120 | if (server.ds_enabled) { |
| 1121 | /* FIXME: flush all objects on disk */ |
| 1122 | } else if (server.appendonly) { |
| 1123 | /* Append only file: fsync() the AOF and exit */ |
| 1124 | aof_fsync(server.appendfd); |
| 1125 | } else if (server.saveparamslen > 0) { |
| 1126 | /* Snapshotting. Perform a SYNC SAVE and exit */ |
| 1127 | if (rdbSave(server.dbfilename) != REDIS_OK) { |
| 1128 | /* Ooops.. error saving! The best we can do is to continue |
| 1129 | * operating. Note that if there was a background saving process, |
| 1130 | * in the next cron() Redis will be notified that the background |
| 1131 | * saving aborted, handling special stuff like slaves pending for |
| 1132 | * synchronization... */ |
| 1133 | redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit"); |
| 1134 | return REDIS_ERR; |
| 1135 | } |
| 1136 | } else { |
| 1137 | redisLog(REDIS_WARNING,"Not saving DB."); |
| 1138 | } |
| 1139 | if (server.daemonize) unlink(server.pidfile); |
| 1140 | redisLog(REDIS_WARNING,"Server exit now, bye bye..."); |
| 1141 | return REDIS_OK; |
| 1142 | } |
| 1143 | |
| 1144 | /*================================== Commands =============================== */ |
| 1145 | |
| 1146 | void authCommand(redisClient *c) { |
| 1147 | if (!server.requirepass || !strcmp(c->argv[1]->ptr, server.requirepass)) { |
| 1148 | c->authenticated = 1; |
| 1149 | addReply(c,shared.ok); |
| 1150 | } else { |
| 1151 | c->authenticated = 0; |
| 1152 | addReplyError(c,"invalid password"); |
| 1153 | } |
| 1154 | } |
| 1155 | |
| 1156 | void pingCommand(redisClient *c) { |
| 1157 | addReply(c,shared.pong); |
| 1158 | } |
| 1159 | |
| 1160 | void echoCommand(redisClient *c) { |
| 1161 | addReplyBulk(c,c->argv[1]); |
| 1162 | } |
| 1163 | |
| 1164 | /* Convert an amount of bytes into a human readable string in the form |
| 1165 | * of 100B, 2G, 100M, 4K, and so forth. */ |
| 1166 | void bytesToHuman(char *s, unsigned long long n) { |
| 1167 | double d; |
| 1168 | |
| 1169 | if (n < 1024) { |
| 1170 | /* Bytes */ |
| 1171 | sprintf(s,"%lluB",n); |
| 1172 | return; |
| 1173 | } else if (n < (1024*1024)) { |
| 1174 | d = (double)n/(1024); |
| 1175 | sprintf(s,"%.2fK",d); |
| 1176 | } else if (n < (1024LL*1024*1024)) { |
| 1177 | d = (double)n/(1024*1024); |
| 1178 | sprintf(s,"%.2fM",d); |
| 1179 | } else if (n < (1024LL*1024*1024*1024)) { |
| 1180 | d = (double)n/(1024LL*1024*1024); |
| 1181 | sprintf(s,"%.2fG",d); |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | /* Create the string returned by the INFO command. This is decoupled |
| 1186 | * by the INFO command itself as we need to report the same information |
| 1187 | * on memory corruption problems. */ |
| 1188 | sds genRedisInfoString(char *section) { |
| 1189 | sds info = sdsempty(); |
| 1190 | time_t uptime = time(NULL)-server.stat_starttime; |
| 1191 | int j, numcommands; |
| 1192 | char hmem[64]; |
| 1193 | struct rusage self_ru, c_ru; |
| 1194 | unsigned long lol, bib; |
| 1195 | int allsections = 0, defsections = 0; |
| 1196 | int sections = 0; |
| 1197 | |
| 1198 | if (section) { |
| 1199 | allsections = strcasecmp(section,"all") == 0; |
| 1200 | defsections = strcasecmp(section,"default") == 0; |
| 1201 | } |
| 1202 | |
| 1203 | getrusage(RUSAGE_SELF, &self_ru); |
| 1204 | getrusage(RUSAGE_CHILDREN, &c_ru); |
| 1205 | getClientsMaxBuffers(&lol,&bib); |
| 1206 | bytesToHuman(hmem,zmalloc_used_memory()); |
| 1207 | |
| 1208 | /* Server */ |
| 1209 | if (allsections || defsections || !strcasecmp(section,"server")) { |
| 1210 | if (sections++) info = sdscat(info,"\r\n"); |
| 1211 | info = sdscatprintf(info, |
| 1212 | "# Server\r\n" |
| 1213 | "redis_version:%s\r\n" |
| 1214 | "redis_git_sha1:%s\r\n" |
| 1215 | "redis_git_dirty:%d\r\n" |
| 1216 | "arch_bits:%s\r\n" |
| 1217 | "multiplexing_api:%s\r\n" |
| 1218 | "process_id:%ld\r\n" |
| 1219 | "tcp_port:%d\r\n" |
| 1220 | "uptime_in_seconds:%ld\r\n" |
| 1221 | "uptime_in_days:%ld\r\n" |
| 1222 | "lru_clock:%ld\r\n", |
| 1223 | REDIS_VERSION, |
| 1224 | redisGitSHA1(), |
| 1225 | strtol(redisGitDirty(),NULL,10) > 0, |
| 1226 | (sizeof(long) == 8) ? "64" : "32", |
| 1227 | aeGetApiName(), |
| 1228 | (long) getpid(), |
| 1229 | server.port, |
| 1230 | uptime, |
| 1231 | uptime/(3600*24), |
| 1232 | (unsigned long) server.lruclock); |
| 1233 | } |
| 1234 | |
| 1235 | /* Clients */ |
| 1236 | if (allsections || defsections || !strcasecmp(section,"clients")) { |
| 1237 | if (sections++) info = sdscat(info,"\r\n"); |
| 1238 | info = sdscatprintf(info, |
| 1239 | "# Clients\r\n" |
| 1240 | "connected_clients:%d\r\n" |
| 1241 | "client_longest_output_list:%lu\r\n" |
| 1242 | "client_biggest_input_buf:%lu\r\n" |
| 1243 | "blocked_clients:%d\r\n", |
| 1244 | listLength(server.clients)-listLength(server.slaves), |
| 1245 | lol, bib, |
| 1246 | server.bpop_blocked_clients); |
| 1247 | } |
| 1248 | |
| 1249 | /* Memory */ |
| 1250 | if (allsections || defsections || !strcasecmp(section,"memory")) { |
| 1251 | if (sections++) info = sdscat(info,"\r\n"); |
| 1252 | info = sdscatprintf(info, |
| 1253 | "# Memory\r\n" |
| 1254 | "used_memory:%zu\r\n" |
| 1255 | "used_memory_human:%s\r\n" |
| 1256 | "used_memory_rss:%zu\r\n" |
| 1257 | "mem_fragmentation_ratio:%.2f\r\n" |
| 1258 | "use_tcmalloc:%d\r\n", |
| 1259 | zmalloc_used_memory(), |
| 1260 | hmem, |
| 1261 | zmalloc_get_rss(), |
| 1262 | zmalloc_get_fragmentation_ratio(), |
| 1263 | #ifdef USE_TCMALLOC |
| 1264 | 1 |
| 1265 | #else |
| 1266 | 0 |
| 1267 | #endif |
| 1268 | ); |
| 1269 | } |
| 1270 | |
| 1271 | /* Allocation statistics */ |
| 1272 | if (allsections || !strcasecmp(section,"allocstats")) { |
| 1273 | if (sections++) info = sdscat(info,"\r\n"); |
| 1274 | info = sdscat(info, "# Allocstats\r\nallocation_stats:"); |
| 1275 | for (j = 0; j <= ZMALLOC_MAX_ALLOC_STAT; j++) { |
| 1276 | size_t count = zmalloc_allocations_for_size(j); |
| 1277 | if (count) { |
| 1278 | if (info[sdslen(info)-1] != ':') info = sdscatlen(info,",",1); |
| 1279 | info = sdscatprintf(info,"%s%d=%zu", |
| 1280 | (j == ZMALLOC_MAX_ALLOC_STAT) ? ">=" : "", |
| 1281 | j,count); |
| 1282 | } |
| 1283 | } |
| 1284 | info = sdscat(info,"\r\n"); |
| 1285 | } |
| 1286 | |
| 1287 | /* Persistence */ |
| 1288 | if (allsections || defsections || !strcasecmp(section,"persistence")) { |
| 1289 | if (sections++) info = sdscat(info,"\r\n"); |
| 1290 | info = sdscatprintf(info, |
| 1291 | "# Persistence\r\n" |
| 1292 | "loading:%d\r\n" |
| 1293 | "aof_enabled:%d\r\n" |
| 1294 | "changes_since_last_save:%lld\r\n" |
| 1295 | "bgsave_in_progress:%d\r\n" |
| 1296 | "last_save_time:%ld\r\n" |
| 1297 | "bgrewriteaof_in_progress:%d\r\n", |
| 1298 | server.loading, |
| 1299 | server.appendonly, |
| 1300 | server.dirty, |
| 1301 | server.bgsavechildpid != -1 || |
| 1302 | server.bgsavethread != (pthread_t) -1, |
| 1303 | server.lastsave, |
| 1304 | server.bgrewritechildpid != -1); |
| 1305 | |
| 1306 | if (server.loading) { |
| 1307 | double perc; |
| 1308 | time_t eta, elapsed; |
| 1309 | off_t remaining_bytes = server.loading_total_bytes- |
| 1310 | server.loading_loaded_bytes; |
| 1311 | |
| 1312 | perc = ((double)server.loading_loaded_bytes / |
| 1313 | server.loading_total_bytes) * 100; |
| 1314 | |
| 1315 | elapsed = time(NULL)-server.loading_start_time; |
| 1316 | if (elapsed == 0) { |
| 1317 | eta = 1; /* A fake 1 second figure if we don't have |
| 1318 | enough info */ |
| 1319 | } else { |
| 1320 | eta = (elapsed*remaining_bytes)/server.loading_loaded_bytes; |
| 1321 | } |
| 1322 | |
| 1323 | info = sdscatprintf(info, |
| 1324 | "loading_start_time:%ld\r\n" |
| 1325 | "loading_total_bytes:%llu\r\n" |
| 1326 | "loading_loaded_bytes:%llu\r\n" |
| 1327 | "loading_loaded_perc:%.2f\r\n" |
| 1328 | "loading_eta_seconds:%ld\r\n" |
| 1329 | ,(unsigned long) server.loading_start_time, |
| 1330 | (unsigned long long) server.loading_total_bytes, |
| 1331 | (unsigned long long) server.loading_loaded_bytes, |
| 1332 | perc, |
| 1333 | eta |
| 1334 | ); |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | /* Diskstore */ |
| 1339 | if (allsections || defsections || !strcasecmp(section,"diskstore")) { |
| 1340 | if (sections++) info = sdscat(info,"\r\n"); |
| 1341 | info = sdscatprintf(info, |
| 1342 | "# Diskstore\r\n" |
| 1343 | "ds_enabled:%d\r\n", |
| 1344 | server.ds_enabled != 0); |
| 1345 | if (server.ds_enabled) { |
| 1346 | lockThreadedIO(); |
| 1347 | info = sdscatprintf(info, |
| 1348 | "cache_max_memory:%llu\r\n" |
| 1349 | "cache_blocked_clients:%lu\r\n" |
| 1350 | "cache_io_queue_len:%lu\r\n" |
| 1351 | "cache_io_jobs_new:%lu\r\n" |
| 1352 | "cache_io_jobs_processing:%lu\r\n" |
| 1353 | "cache_io_jobs_processed:%lu\r\n" |
| 1354 | "cache_io_ready_clients:%lu\r\n" |
| 1355 | ,(unsigned long long) server.cache_max_memory, |
| 1356 | (unsigned long) server.cache_blocked_clients, |
| 1357 | (unsigned long) listLength(server.cache_io_queue), |
| 1358 | (unsigned long) listLength(server.io_newjobs), |
| 1359 | (unsigned long) listLength(server.io_processing), |
| 1360 | (unsigned long) listLength(server.io_processed), |
| 1361 | (unsigned long) listLength(server.io_ready_clients) |
| 1362 | ); |
| 1363 | unlockThreadedIO(); |
| 1364 | } |
| 1365 | } |
| 1366 | |
| 1367 | /* Stats */ |
| 1368 | if (allsections || defsections || !strcasecmp(section,"stats")) { |
| 1369 | if (sections++) info = sdscat(info,"\r\n"); |
| 1370 | info = sdscatprintf(info, |
| 1371 | "# Stats\r\n" |
| 1372 | "total_connections_received:%lld\r\n" |
| 1373 | "total_commands_processed:%lld\r\n" |
| 1374 | "expired_keys:%lld\r\n" |
| 1375 | "evicted_keys:%lld\r\n" |
| 1376 | "keyspace_hits:%lld\r\n" |
| 1377 | "keyspace_misses:%lld\r\n" |
| 1378 | "pubsub_channels:%ld\r\n" |
| 1379 | "pubsub_patterns:%u\r\n", |
| 1380 | server.stat_numconnections, |
| 1381 | server.stat_numcommands, |
| 1382 | server.stat_expiredkeys, |
| 1383 | server.stat_evictedkeys, |
| 1384 | server.stat_keyspace_hits, |
| 1385 | server.stat_keyspace_misses, |
| 1386 | dictSize(server.pubsub_channels), |
| 1387 | listLength(server.pubsub_patterns)); |
| 1388 | } |
| 1389 | |
| 1390 | /* Replication */ |
| 1391 | if (allsections || defsections || !strcasecmp(section,"replication")) { |
| 1392 | if (sections++) info = sdscat(info,"\r\n"); |
| 1393 | info = sdscatprintf(info, |
| 1394 | "# Replication\r\n" |
| 1395 | "role:%s\r\n", |
| 1396 | server.masterhost == NULL ? "master" : "slave"); |
| 1397 | if (server.masterhost) { |
| 1398 | info = sdscatprintf(info, |
| 1399 | "master_host:%s\r\n" |
| 1400 | "master_port:%d\r\n" |
| 1401 | "master_link_status:%s\r\n" |
| 1402 | "master_last_io_seconds_ago:%d\r\n" |
| 1403 | "master_sync_in_progress:%d\r\n" |
| 1404 | ,server.masterhost, |
| 1405 | server.masterport, |
| 1406 | (server.replstate == REDIS_REPL_CONNECTED) ? |
| 1407 | "up" : "down", |
| 1408 | server.master ? |
| 1409 | ((int)(time(NULL)-server.master->lastinteraction)) : -1, |
| 1410 | server.replstate == REDIS_REPL_TRANSFER |
| 1411 | ); |
| 1412 | |
| 1413 | if (server.replstate == REDIS_REPL_TRANSFER) { |
| 1414 | info = sdscatprintf(info, |
| 1415 | "master_sync_left_bytes:%ld\r\n" |
| 1416 | "master_sync_last_io_seconds_ago:%d\r\n" |
| 1417 | ,(long)server.repl_transfer_left, |
| 1418 | (int)(time(NULL)-server.repl_transfer_lastio) |
| 1419 | ); |
| 1420 | } |
| 1421 | } |
| 1422 | info = sdscatprintf(info, |
| 1423 | "connected_slaves:%d\r\n", |
| 1424 | listLength(server.slaves)); |
| 1425 | } |
| 1426 | |
| 1427 | /* CPU */ |
| 1428 | if (allsections || defsections || !strcasecmp(section,"cpu")) { |
| 1429 | if (sections++) info = sdscat(info,"\r\n"); |
| 1430 | info = sdscatprintf(info, |
| 1431 | "# CPU\r\n" |
| 1432 | "used_cpu_sys:%.2f\r\n" |
| 1433 | "used_cpu_user:%.2f\r\n" |
| 1434 | "used_cpu_sys_childrens:%.2f\r\n" |
| 1435 | "used_cpu_user_childrens:%.2f\r\n", |
| 1436 | (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000, |
| 1437 | (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000, |
| 1438 | (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000, |
| 1439 | (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000); |
| 1440 | } |
| 1441 | |
| 1442 | /* cmdtime */ |
| 1443 | if (allsections || !strcasecmp(section,"commandstats")) { |
| 1444 | if (sections++) info = sdscat(info,"\r\n"); |
| 1445 | info = sdscatprintf(info, "# Commandstats\r\n"); |
| 1446 | numcommands = sizeof(redisCommandTable)/sizeof(struct redisCommand); |
| 1447 | for (j = 0; j < numcommands; j++) { |
| 1448 | struct redisCommand *c = redisCommandTable+j; |
| 1449 | |
| 1450 | if (!c->calls) continue; |
| 1451 | info = sdscatprintf(info, |
| 1452 | "cmdstat_%s:calls=%lld,usec=%lld,usec_per_call=%.2f\r\n", |
| 1453 | c->name, c->calls, c->microseconds, |
| 1454 | (c->calls == 0) ? 0 : ((float)c->microseconds/c->calls)); |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | /* Key space */ |
| 1459 | if (allsections || defsections || !strcasecmp(section,"keyspace")) { |
| 1460 | if (sections++) info = sdscat(info,"\r\n"); |
| 1461 | info = sdscatprintf(info, "# Keyspace\r\n"); |
| 1462 | for (j = 0; j < server.dbnum; j++) { |
| 1463 | long long keys, vkeys; |
| 1464 | |
| 1465 | keys = dictSize(server.db[j].dict); |
| 1466 | vkeys = dictSize(server.db[j].expires); |
| 1467 | if (keys || vkeys) { |
| 1468 | info = sdscatprintf(info, "db%d:keys=%lld,expires=%lld\r\n", |
| 1469 | j, keys, vkeys); |
| 1470 | } |
| 1471 | } |
| 1472 | } |
| 1473 | return info; |
| 1474 | } |
| 1475 | |
| 1476 | void infoCommand(redisClient *c) { |
| 1477 | char *section = c->argc == 2 ? c->argv[1]->ptr : "default"; |
| 1478 | |
| 1479 | if (c->argc > 2) { |
| 1480 | addReply(c,shared.syntaxerr); |
| 1481 | return; |
| 1482 | } |
| 1483 | sds info = genRedisInfoString(section); |
| 1484 | addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n", |
| 1485 | (unsigned long)sdslen(info))); |
| 1486 | addReplySds(c,info); |
| 1487 | addReply(c,shared.crlf); |
| 1488 | } |
| 1489 | |
| 1490 | void monitorCommand(redisClient *c) { |
| 1491 | /* ignore MONITOR if aleady slave or in monitor mode */ |
| 1492 | if (c->flags & REDIS_SLAVE) return; |
| 1493 | |
| 1494 | c->flags |= (REDIS_SLAVE|REDIS_MONITOR); |
| 1495 | c->slaveseldb = 0; |
| 1496 | listAddNodeTail(server.monitors,c); |
| 1497 | addReply(c,shared.ok); |
| 1498 | } |
| 1499 | |
| 1500 | /* ============================ Maxmemory directive ======================== */ |
| 1501 | |
| 1502 | /* This function gets called when 'maxmemory' is set on the config file to limit |
| 1503 | * the max memory used by the server, and we are out of memory. |
| 1504 | * This function will try to, in order: |
| 1505 | * |
| 1506 | * - Free objects from the free list |
| 1507 | * - Try to remove keys with an EXPIRE set |
| 1508 | * |
| 1509 | * It is not possible to free enough memory to reach used-memory < maxmemory |
| 1510 | * the server will start refusing commands that will enlarge even more the |
| 1511 | * memory usage. |
| 1512 | */ |
| 1513 | void freeMemoryIfNeeded(void) { |
| 1514 | /* Remove keys accordingly to the active policy as long as we are |
| 1515 | * over the memory limit. */ |
| 1516 | if (server.maxmemory_policy == REDIS_MAXMEMORY_NO_EVICTION) return; |
| 1517 | |
| 1518 | while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) { |
| 1519 | int j, k, freed = 0; |
| 1520 | |
| 1521 | for (j = 0; j < server.dbnum; j++) { |
| 1522 | long bestval = 0; /* just to prevent warning */ |
| 1523 | sds bestkey = NULL; |
| 1524 | struct dictEntry *de; |
| 1525 | redisDb *db = server.db+j; |
| 1526 | dict *dict; |
| 1527 | |
| 1528 | if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU || |
| 1529 | server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM) |
| 1530 | { |
| 1531 | dict = server.db[j].dict; |
| 1532 | } else { |
| 1533 | dict = server.db[j].expires; |
| 1534 | } |
| 1535 | if (dictSize(dict) == 0) continue; |
| 1536 | |
| 1537 | /* volatile-random and allkeys-random policy */ |
| 1538 | if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM || |
| 1539 | server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_RANDOM) |
| 1540 | { |
| 1541 | de = dictGetRandomKey(dict); |
| 1542 | bestkey = dictGetEntryKey(de); |
| 1543 | } |
| 1544 | |
| 1545 | /* volatile-lru and allkeys-lru policy */ |
| 1546 | else if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU || |
| 1547 | server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU) |
| 1548 | { |
| 1549 | for (k = 0; k < server.maxmemory_samples; k++) { |
| 1550 | sds thiskey; |
| 1551 | long thisval; |
| 1552 | robj *o; |
| 1553 | |
| 1554 | de = dictGetRandomKey(dict); |
| 1555 | thiskey = dictGetEntryKey(de); |
| 1556 | /* When policy is volatile-lru we need an additonal lookup |
| 1557 | * to locate the real key, as dict is set to db->expires. */ |
| 1558 | if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU) |
| 1559 | de = dictFind(db->dict, thiskey); |
| 1560 | o = dictGetEntryVal(de); |
| 1561 | thisval = estimateObjectIdleTime(o); |
| 1562 | |
| 1563 | /* Higher idle time is better candidate for deletion */ |
| 1564 | if (bestkey == NULL || thisval > bestval) { |
| 1565 | bestkey = thiskey; |
| 1566 | bestval = thisval; |
| 1567 | } |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | /* volatile-ttl */ |
| 1572 | else if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_TTL) { |
| 1573 | for (k = 0; k < server.maxmemory_samples; k++) { |
| 1574 | sds thiskey; |
| 1575 | long thisval; |
| 1576 | |
| 1577 | de = dictGetRandomKey(dict); |
| 1578 | thiskey = dictGetEntryKey(de); |
| 1579 | thisval = (long) dictGetEntryVal(de); |
| 1580 | |
| 1581 | /* Expire sooner (minor expire unix timestamp) is better |
| 1582 | * candidate for deletion */ |
| 1583 | if (bestkey == NULL || thisval < bestval) { |
| 1584 | bestkey = thiskey; |
| 1585 | bestval = thisval; |
| 1586 | } |
| 1587 | } |
| 1588 | } |
| 1589 | |
| 1590 | /* Finally remove the selected key. */ |
| 1591 | if (bestkey) { |
| 1592 | robj *keyobj = createStringObject(bestkey,sdslen(bestkey)); |
| 1593 | propagateExpire(db,keyobj); |
| 1594 | dbDelete(db,keyobj); |
| 1595 | server.stat_evictedkeys++; |
| 1596 | decrRefCount(keyobj); |
| 1597 | freed++; |
| 1598 | } |
| 1599 | } |
| 1600 | if (!freed) return; /* nothing to free... */ |
| 1601 | } |
| 1602 | } |
| 1603 | |
| 1604 | /* =================================== Main! ================================ */ |
| 1605 | |
| 1606 | #ifdef __linux__ |
| 1607 | int linuxOvercommitMemoryValue(void) { |
| 1608 | FILE *fp = fopen("/proc/sys/vm/overcommit_memory","r"); |
| 1609 | char buf[64]; |
| 1610 | |
| 1611 | if (!fp) return -1; |
| 1612 | if (fgets(buf,64,fp) == NULL) { |
| 1613 | fclose(fp); |
| 1614 | return -1; |
| 1615 | } |
| 1616 | fclose(fp); |
| 1617 | |
| 1618 | return atoi(buf); |
| 1619 | } |
| 1620 | |
| 1621 | void linuxOvercommitMemoryWarning(void) { |
| 1622 | if (linuxOvercommitMemoryValue() == 0) { |
| 1623 | redisLog(REDIS_WARNING,"WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect."); |
| 1624 | } |
| 1625 | } |
| 1626 | #endif /* __linux__ */ |
| 1627 | |
| 1628 | void createPidFile(void) { |
| 1629 | /* Try to write the pid file in a best-effort way. */ |
| 1630 | FILE *fp = fopen(server.pidfile,"w"); |
| 1631 | if (fp) { |
| 1632 | fprintf(fp,"%d\n",(int)getpid()); |
| 1633 | fclose(fp); |
| 1634 | } |
| 1635 | } |
| 1636 | |
| 1637 | void daemonize(void) { |
| 1638 | int fd; |
| 1639 | |
| 1640 | if (fork() != 0) exit(0); /* parent exits */ |
| 1641 | setsid(); /* create a new session */ |
| 1642 | |
| 1643 | /* Every output goes to /dev/null. If Redis is daemonized but |
| 1644 | * the 'logfile' is set to 'stdout' in the configuration file |
| 1645 | * it will not log at all. */ |
| 1646 | if ((fd = open("/dev/null", O_RDWR, 0)) != -1) { |
| 1647 | dup2(fd, STDIN_FILENO); |
| 1648 | dup2(fd, STDOUT_FILENO); |
| 1649 | dup2(fd, STDERR_FILENO); |
| 1650 | if (fd > STDERR_FILENO) close(fd); |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | void version() { |
| 1655 | printf("Redis server version %s (%s:%d)\n", REDIS_VERSION, |
| 1656 | redisGitSHA1(), atoi(redisGitDirty()) > 0); |
| 1657 | exit(0); |
| 1658 | } |
| 1659 | |
| 1660 | void usage() { |
| 1661 | fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n"); |
| 1662 | fprintf(stderr," ./redis-server - (read config from stdin)\n"); |
| 1663 | exit(1); |
| 1664 | } |
| 1665 | |
| 1666 | int main(int argc, char **argv) { |
| 1667 | time_t start; |
| 1668 | |
| 1669 | initServerConfig(); |
| 1670 | if (argc == 2) { |
| 1671 | if (strcmp(argv[1], "-v") == 0 || |
| 1672 | strcmp(argv[1], "--version") == 0) version(); |
| 1673 | if (strcmp(argv[1], "--help") == 0) usage(); |
| 1674 | resetServerSaveParams(); |
| 1675 | loadServerConfig(argv[1]); |
| 1676 | } else if ((argc > 2)) { |
| 1677 | usage(); |
| 1678 | } else { |
| 1679 | redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'"); |
| 1680 | } |
| 1681 | if (server.daemonize) daemonize(); |
| 1682 | initServer(); |
| 1683 | if (server.daemonize) createPidFile(); |
| 1684 | redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION); |
| 1685 | #ifdef __linux__ |
| 1686 | linuxOvercommitMemoryWarning(); |
| 1687 | #endif |
| 1688 | start = time(NULL); |
| 1689 | if (server.ds_enabled) { |
| 1690 | redisLog(REDIS_NOTICE,"DB not loaded (running with disk back end)"); |
| 1691 | } else if (server.appendonly) { |
| 1692 | if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK) |
| 1693 | redisLog(REDIS_NOTICE,"DB loaded from append only file: %ld seconds",time(NULL)-start); |
| 1694 | } else { |
| 1695 | if (rdbLoad(server.dbfilename) == REDIS_OK) |
| 1696 | redisLog(REDIS_NOTICE,"DB loaded from disk: %ld seconds",time(NULL)-start); |
| 1697 | } |
| 1698 | if (server.ipfd > 0) |
| 1699 | redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port); |
| 1700 | if (server.sofd > 0) |
| 1701 | redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket); |
| 1702 | aeSetBeforeSleepProc(server.el,beforeSleep); |
| 1703 | aeMain(server.el); |
| 1704 | aeDeleteEventLoop(server.el); |
| 1705 | return 0; |
| 1706 | } |
| 1707 | |
| 1708 | /* ============================= Backtrace support ========================= */ |
| 1709 | |
| 1710 | #ifdef HAVE_BACKTRACE |
| 1711 | void *getMcontextEip(ucontext_t *uc) { |
| 1712 | #if defined(__FreeBSD__) |
| 1713 | return (void*) uc->uc_mcontext.mc_eip; |
| 1714 | #elif defined(__dietlibc__) |
| 1715 | return (void*) uc->uc_mcontext.eip; |
| 1716 | #elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6) |
| 1717 | #if __x86_64__ |
| 1718 | return (void*) uc->uc_mcontext->__ss.__rip; |
| 1719 | #else |
| 1720 | return (void*) uc->uc_mcontext->__ss.__eip; |
| 1721 | #endif |
| 1722 | #elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_6) |
| 1723 | #if defined(_STRUCT_X86_THREAD_STATE64) && !defined(__i386__) |
| 1724 | return (void*) uc->uc_mcontext->__ss.__rip; |
| 1725 | #else |
| 1726 | return (void*) uc->uc_mcontext->__ss.__eip; |
| 1727 | #endif |
| 1728 | #elif defined(__i386__) |
| 1729 | return (void*) uc->uc_mcontext.gregs[14]; /* Linux 32 */ |
| 1730 | #elif defined(__X86_64__) || defined(__x86_64__) |
| 1731 | return (void*) uc->uc_mcontext.gregs[16]; /* Linux 64 */ |
| 1732 | #elif defined(__ia64__) /* Linux IA64 */ |
| 1733 | return (void*) uc->uc_mcontext.sc_ip; |
| 1734 | #else |
| 1735 | return NULL; |
| 1736 | #endif |
| 1737 | } |
| 1738 | |
| 1739 | void segvHandler(int sig, siginfo_t *info, void *secret) { |
| 1740 | void *trace[100]; |
| 1741 | char **messages = NULL; |
| 1742 | int i, trace_size = 0; |
| 1743 | ucontext_t *uc = (ucontext_t*) secret; |
| 1744 | sds infostring; |
| 1745 | struct sigaction act; |
| 1746 | REDIS_NOTUSED(info); |
| 1747 | |
| 1748 | redisLog(REDIS_WARNING, |
| 1749 | "======= Ooops! Redis %s got signal: -%d- =======", REDIS_VERSION, sig); |
| 1750 | infostring = genRedisInfoString("all"); |
| 1751 | redisLogRaw(REDIS_WARNING, infostring); |
| 1752 | /* It's not safe to sdsfree() the returned string under memory |
| 1753 | * corruption conditions. Let it leak as we are going to abort */ |
| 1754 | |
| 1755 | trace_size = backtrace(trace, 100); |
| 1756 | /* overwrite sigaction with caller's address */ |
| 1757 | if (getMcontextEip(uc) != NULL) { |
| 1758 | trace[1] = getMcontextEip(uc); |
| 1759 | } |
| 1760 | messages = backtrace_symbols(trace, trace_size); |
| 1761 | |
| 1762 | for (i=1; i<trace_size; ++i) |
| 1763 | redisLog(REDIS_WARNING,"%s", messages[i]); |
| 1764 | |
| 1765 | /* free(messages); Don't call free() with possibly corrupted memory. */ |
| 1766 | if (server.daemonize) unlink(server.pidfile); |
| 1767 | |
| 1768 | /* Make sure we exit with the right signal at the end. So for instance |
| 1769 | * the core will be dumped if enabled. */ |
| 1770 | sigemptyset (&act.sa_mask); |
| 1771 | /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction |
| 1772 | * is used. Otherwise, sa_handler is used */ |
| 1773 | act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND; |
| 1774 | act.sa_handler = SIG_DFL; |
| 1775 | sigaction (sig, &act, NULL); |
| 1776 | kill(getpid(),sig); |
| 1777 | } |
| 1778 | |
| 1779 | void sigtermHandler(int sig) { |
| 1780 | REDIS_NOTUSED(sig); |
| 1781 | |
| 1782 | redisLog(REDIS_WARNING,"SIGTERM received, scheduling shutting down..."); |
| 1783 | server.shutdown_asap = 1; |
| 1784 | } |
| 1785 | |
| 1786 | void setupSigSegvAction(void) { |
| 1787 | struct sigaction act; |
| 1788 | |
| 1789 | sigemptyset (&act.sa_mask); |
| 1790 | /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction |
| 1791 | * is used. Otherwise, sa_handler is used */ |
| 1792 | act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO; |
| 1793 | act.sa_sigaction = segvHandler; |
| 1794 | sigaction (SIGSEGV, &act, NULL); |
| 1795 | sigaction (SIGBUS, &act, NULL); |
| 1796 | sigaction (SIGFPE, &act, NULL); |
| 1797 | sigaction (SIGILL, &act, NULL); |
| 1798 | sigaction (SIGBUS, &act, NULL); |
| 1799 | |
| 1800 | act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND; |
| 1801 | act.sa_handler = sigtermHandler; |
| 1802 | sigaction (SIGTERM, &act, NULL); |
| 1803 | return; |
| 1804 | } |
| 1805 | |
| 1806 | #else /* HAVE_BACKTRACE */ |
| 1807 | void setupSigSegvAction(void) { |
| 1808 | } |
| 1809 | #endif /* HAVE_BACKTRACE */ |
| 1810 | |
| 1811 | /* The End */ |