X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/0f9997845af236097c8802771cca3cff84c4e77b..bb0fbc840d80d30a513cc85cf40848f1b006275c:/src/redis.c diff --git a/src/redis.c b/src/redis.c index 2f27b4dd..e8d89a98 100644 --- a/src/redis.c +++ b/src/redis.c @@ -222,7 +222,7 @@ struct redisCommand redisCommandTable[] = { {"ttl",ttlCommand,2,"r",0,NULL,1,1,1,0,0}, {"pttl",pttlCommand,2,"r",0,NULL,1,1,1,0,0}, {"persist",persistCommand,2,"w",0,NULL,1,1,1,0,0}, - {"slaveof",slaveofCommand,3,"aws",0,NULL,0,0,0,0,0}, + {"slaveof",slaveofCommand,3,"as",0,NULL,0,0,0,0,0}, {"debug",debugCommand,-2,"as",0,NULL,0,0,0,0,0}, {"config",configCommand,-2,"ar",0,NULL,0,0,0,0,0}, {"subscribe",subscribeCommand,-2,"rps",0,NULL,0,0,0,0,0}, @@ -253,7 +253,6 @@ struct redisCommand redisCommandTable[] = { void redisLogRaw(int level, const char *msg) { const int syslogLevelMap[] = { LOG_DEBUG, LOG_INFO, LOG_NOTICE, LOG_WARNING }; const char *c = ".-*#"; - time_t now = time(NULL); FILE *fp; char buf[64]; int rawmode = (level & REDIS_LOG_RAW); @@ -267,7 +266,12 @@ void redisLogRaw(int level, const char *msg) { if (rawmode) { fprintf(fp,"%s",msg); } else { - strftime(buf,sizeof(buf),"%d %b %H:%M:%S",localtime(&now)); + int off; + struct timeval tv; + + gettimeofday(&tv,NULL); + off = strftime(buf,sizeof(buf),"%d %b %H:%M:%S.",localtime(&tv.tv_sec)); + snprintf(buf+off,sizeof(buf)-off,"%03d",(int)tv.tv_usec/1000); fprintf(fp,"[%d] %s %c %s\n",(int)getpid(),buf,c[level],msg); } fflush(fp); @@ -293,6 +297,34 @@ void redisLog(int level, const char *fmt, ...) { redisLogRaw(level,msg); } +/* Log a fixed message without printf-alike capabilities, in a way that is + * safe to call from a signal handler. + * + * We actually use this only for signals that are not fatal from the point + * of view of Redis. Signals that are going to kill the server anyway and + * where we need printf-alike features are served by redisLog(). */ +void redisLogFromHandler(int level, const char *msg) { + int fd; + char buf[64]; + + if ((level&0xff) < server.verbosity || + (server.logfile == NULL && server.daemonize)) return; + fd = server.logfile ? + open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644) : + STDOUT_FILENO; + if (fd == -1) return; + ll2string(buf,sizeof(buf),getpid()); + write(fd,"[",1); + write(fd,buf,strlen(buf)); + write(fd," | signal handler] (",20); + ll2string(buf,sizeof(buf),time(NULL)); + write(fd,buf,strlen(buf)); + write(fd,") ",2); + write(fd,msg,strlen(msg)); + write(fd,"\n",1); + if (server.logfile) close(fd); +} + /* Redis generally does not try to recover from out of memory conditions * when allocating objects or strings, it is not clear if it will be possible * to report this condition to the client since the networking layer itself @@ -612,7 +644,7 @@ void activeExpireCycle(void) { } void updateLRUClock(void) { - server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) & + server.lruclock = (server.unixtime/REDIS_LRU_CLOCK_RESOLUTION) & REDIS_LRU_CLOCK_MAX; } @@ -726,6 +758,10 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) { REDIS_NOTUSED(id); REDIS_NOTUSED(clientData); + /* Software watchdog: deliver the SIGALRM that will reach the signal + * handler if we don't return here fast enough. */ + if (server.watchdog_period) watchdogScheduleSignal(server.watchdog_period); + /* We take a cached value of the unix time in the global state because * with virtual memory and aging there is to store the current time * in objects at every object access, and accuracy is not needed. @@ -821,15 +857,13 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) { updateDictResizePolicy(); } } else { - time_t now = time(NULL); - /* If there is not a background saving/rewrite in progress check if * we have to save/rewrite now */ for (j = 0; j < server.saveparamslen; j++) { struct saveparam *sp = server.saveparams+j; if (server.dirty >= sp->changes && - now-server.lastsave > sp->seconds) { + server.unixtime-server.lastsave > sp->seconds) { redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...", sp->changes, sp->seconds); rdbSaveBackground(server.rdb_filename); @@ -947,16 +981,11 @@ void createSharedObjects(void) { shared.space = createObject(REDIS_STRING,sdsnew(" ")); shared.colon = createObject(REDIS_STRING,sdsnew(":")); shared.plus = createObject(REDIS_STRING,sdsnew("+")); - shared.select0 = createStringObject("select 0\r\n",10); - shared.select1 = createStringObject("select 1\r\n",10); - shared.select2 = createStringObject("select 2\r\n",10); - shared.select3 = createStringObject("select 3\r\n",10); - shared.select4 = createStringObject("select 4\r\n",10); - shared.select5 = createStringObject("select 5\r\n",10); - shared.select6 = createStringObject("select 6\r\n",10); - shared.select7 = createStringObject("select 7\r\n",10); - shared.select8 = createStringObject("select 8\r\n",10); - shared.select9 = createStringObject("select 9\r\n",10); + + for (j = 0; j < REDIS_SHARED_SELECT_CMDS; j++) { + shared.select[j] = createObject(REDIS_STRING, + sdscatprintf(sdsempty(),"select %d\r\n", j)); + } shared.messagebulk = createStringObject("$7\r\nmessage\r\n",13); shared.pmessagebulk = createStringObject("$8\r\npmessage\r\n",14); shared.subscribebulk = createStringObject("$9\r\nsubscribe\r\n",15); @@ -1007,6 +1036,7 @@ void initServerConfig() { server.aof_rewrite_base_size = 0; server.aof_rewrite_scheduled = 0; server.aof_last_fsync = time(NULL); + server.aof_delayed_fsync = 0; server.aof_fd = -1; server.aof_selected_db = -1; /* Make sure the first time will not match */ server.aof_flush_postponed_start = 0; @@ -1085,11 +1115,12 @@ void initServerConfig() { server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN; server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN; - /* Assert */ + /* Debugging */ server.assert_failed = ""; server.assert_file = ""; server.assert_line = 0; server.bug_report_start = 0; + server.watchdog_period = 0; } /* This function will try to raise the max number of open files accordingly to @@ -1115,10 +1146,18 @@ void adjustOpenFilesLimit(void) { /* Set the max number of files if the current limit is not enough * for our needs. */ if (oldlimit < maxfiles) { - limit.rlim_cur = maxfiles; - limit.rlim_max = maxfiles; - if (setrlimit(RLIMIT_NOFILE,&limit) == -1) { - server.maxclients = oldlimit-32; + rlim_t f; + + f = maxfiles; + while(f > oldlimit) { + limit.rlim_cur = f; + limit.rlim_max = f; + if (setrlimit(RLIMIT_NOFILE,&limit) != -1) break; + f -= 128; + } + if (f < oldlimit) f = oldlimit; + if (f != maxfiles) { + server.maxclients = f-32; redisLog(REDIS_WARNING,"Unable to set the max number of files limit to %d (%s), setting the max clients configuration to %d.", (int) maxfiles, strerror(errno), (int) server.maxclients); } else { @@ -1682,7 +1721,7 @@ void bytesToHuman(char *s, unsigned long long n) { * on memory corruption problems. */ sds genRedisInfoString(char *section) { sds info = sdsempty(); - time_t uptime = time(NULL)-server.stat_starttime; + time_t uptime = server.unixtime-server.stat_starttime; int j, numcommands; struct rusage self_ru, c_ru; unsigned long lol, bib; @@ -1802,12 +1841,14 @@ sds genRedisInfoString(char *section) { "aof_base_size:%lld\r\n" "aof_pending_rewrite:%d\r\n" "aof_buffer_length:%zu\r\n" - "aof_pending_bio_fsync:%llu\r\n", + "aof_pending_bio_fsync:%llu\r\n" + "aof_delayed_fsync:%lu\r\n", (long long) server.aof_current_size, (long long) server.aof_rewrite_base_size, server.aof_rewrite_scheduled, sdslen(server.aof_buf), - bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC)); + bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC), + server.aof_delayed_fsync); } if (server.loading) { @@ -1819,7 +1860,7 @@ sds genRedisInfoString(char *section) { perc = ((double)server.loading_loaded_bytes / server.loading_total_bytes) * 100; - elapsed = time(NULL)-server.loading_start_time; + elapsed = server.unixtime-server.loading_start_time; if (elapsed == 0) { eta = 1; /* A fake 1 second figure if we don't have enough info */ @@ -1890,7 +1931,7 @@ sds genRedisInfoString(char *section) { (server.repl_state == REDIS_REPL_CONNECTED) ? "up" : "down", server.master ? - ((int)(time(NULL)-server.master->lastinteraction)) : -1, + ((int)(server.unixtime-server.master->lastinteraction)) : -1, server.repl_state == REDIS_REPL_TRANSFER ); @@ -1899,14 +1940,14 @@ sds genRedisInfoString(char *section) { "master_sync_left_bytes:%ld\r\n" "master_sync_last_io_seconds_ago:%d\r\n" ,(long)server.repl_transfer_left, - (int)(time(NULL)-server.repl_transfer_lastio) + (int)(server.unixtime-server.repl_transfer_lastio) ); } if (server.repl_state != REDIS_REPL_CONNECTED) { info = sdscatprintf(info, "master_link_down_since_seconds:%ld\r\n", - (long)time(NULL)-server.repl_down_since); + (long)server.unixtime-server.repl_down_since); } } info = sdscatprintf(info, @@ -2276,7 +2317,7 @@ void redisAsciiArt(void) { static void sigtermHandler(int sig) { REDIS_NOTUSED(sig); - redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown..."); + redisLogFromHandler(REDIS_WARNING,"Received SIGTERM, scheduling shutdown..."); server.shutdown_asap = 1; }