X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/442246dde2d8842caf4c1f4d4694ef5a78a0bad8..a8a981a834f1e8704ed2250ec14646e01760756b:/src/networking.c diff --git a/src/networking.c b/src/networking.c index 99a381ce..f922e297 100644 --- a/src/networking.c +++ b/src/networking.c @@ -3,6 +3,14 @@ static void setProtocolError(redisClient *c, int pos); +/* To evaluate the output buffer size of a client we need to get size of + * allocated objects, however we can't used zmalloc_size() directly on sds + * strings because of the trick they use to work (the header is before the + * returned pointer), so we use this helper function. */ +size_t zmalloc_size_sds(sds s) { + return zmalloc_size(s-sizeof(struct sdshdr)); +} + void *dupClientReplyValue(void *o) { incrRefCount((robj*)o); return o; @@ -14,7 +22,6 @@ int listMatchObjects(void *a, void *b) { redisClient *createClient(int fd) { redisClient *c = zmalloc(sizeof(redisClient)); - c->bufpos = 0; /* passing -1 as fd it is possible to create a non connected client. * This is useful since all the Redis commands needs to be executed @@ -34,7 +41,9 @@ redisClient *createClient(int fd) { selectDb(c,0); c->fd = fd; + c->bufpos = 0; c->querybuf = sdsempty(); + c->querybuf_peak = 0; c->reqtype = 0; c->argc = 0; c->argv = NULL; @@ -43,7 +52,7 @@ redisClient *createClient(int fd) { c->bulklen = -1; c->sentlen = 0; c->flags = 0; - c->lastinteraction = time(NULL); + c->ctime = c->lastinteraction = server.unixtime; c->authenticated = 0; c->replstate = REDIS_REPL_NONE; c->reply = listCreate(); @@ -137,6 +146,7 @@ void _addReplyObjectToList(redisClient *c, robj *o) { if (listLength(c->reply) == 0) { incrRefCount(o); listAddNodeTail(c->reply,o); + c->reply_bytes += zmalloc_size_sds(o->ptr); } else { tail = listNodeValue(listLast(c->reply)); @@ -144,14 +154,16 @@ void _addReplyObjectToList(redisClient *c, robj *o) { if (tail->ptr != NULL && sdslen(tail->ptr)+sdslen(o->ptr) <= REDIS_REPLY_CHUNK_BYTES) { + c->reply_bytes -= zmalloc_size_sds(tail->ptr); tail = dupLastObjectIfNeeded(c->reply); tail->ptr = sdscatlen(tail->ptr,o->ptr,sdslen(o->ptr)); + c->reply_bytes += zmalloc_size_sds(tail->ptr); } else { incrRefCount(o); listAddNodeTail(c->reply,o); + c->reply_bytes += zmalloc_size_sds(o->ptr); } } - c->reply_bytes += zmalloc_size(o->ptr); asyncCloseClientOnOutputBufferLimitReached(c); } @@ -165,9 +177,9 @@ void _addReplySdsToList(redisClient *c, sds s) { return; } - c->reply_bytes += zmalloc_size(s); if (listLength(c->reply) == 0) { listAddNodeTail(c->reply,createObject(REDIS_STRING,s)); + c->reply_bytes += zmalloc_size_sds(s); } else { tail = listNodeValue(listLast(c->reply)); @@ -175,11 +187,14 @@ void _addReplySdsToList(redisClient *c, sds s) { if (tail->ptr != NULL && sdslen(tail->ptr)+sdslen(s) <= REDIS_REPLY_CHUNK_BYTES) { + c->reply_bytes -= zmalloc_size_sds(tail->ptr); tail = dupLastObjectIfNeeded(c->reply); tail->ptr = sdscatlen(tail->ptr,s,sdslen(s)); + c->reply_bytes += zmalloc_size_sds(tail->ptr); sdsfree(s); } else { listAddNodeTail(c->reply,createObject(REDIS_STRING,s)); + c->reply_bytes += zmalloc_size_sds(s); } } asyncCloseClientOnOutputBufferLimitReached(c); @@ -194,7 +209,7 @@ void _addReplyStringToList(redisClient *c, char *s, size_t len) { robj *o = createStringObject(s,len); listAddNodeTail(c->reply,o); - c->reply_bytes += zmalloc_size(o->ptr); + c->reply_bytes += zmalloc_size_sds(o->ptr); } else { tail = listNodeValue(listLast(c->reply)); @@ -202,15 +217,15 @@ void _addReplyStringToList(redisClient *c, char *s, size_t len) { if (tail->ptr != NULL && sdslen(tail->ptr)+len <= REDIS_REPLY_CHUNK_BYTES) { - c->reply_bytes -= zmalloc_size(tail->ptr); + c->reply_bytes -= zmalloc_size_sds(tail->ptr); tail = dupLastObjectIfNeeded(c->reply); tail->ptr = sdscatlen(tail->ptr,s,len); - c->reply_bytes += zmalloc_size(tail->ptr); + c->reply_bytes += zmalloc_size_sds(tail->ptr); } else { robj *o = createStringObject(s,len); listAddNodeTail(c->reply,o); - c->reply_bytes += zmalloc_size(o->ptr); + c->reply_bytes += zmalloc_size_sds(o->ptr); } } asyncCloseClientOnOutputBufferLimitReached(c); @@ -343,7 +358,7 @@ void setDeferredMultiBulkLength(redisClient *c, void *node, long length) { len = listNodeValue(ln); len->ptr = sdscatprintf(sdsempty(),"*%ld\r\n",length); - c->reply_bytes += zmalloc_size(len->ptr); + c->reply_bytes += zmalloc_size_sds(len->ptr); if (ln->next != NULL) { next = listNodeValue(ln->next); @@ -532,6 +547,16 @@ static void freeClientArgv(redisClient *c) { c->cmd = NULL; } +/* Close all the slaves connections. This is useful in chained replication + * when we resync with our own master and want to force all our slaves to + * resync with us as well. */ +void disconnectSlaves(void) { + while (listLength(server.slaves)) { + listNode *ln = listFirst(server.slaves); + freeClient((redisClient*)ln->value); + } +} + void freeClient(redisClient *c) { listNode *ln; @@ -589,22 +614,13 @@ void freeClient(redisClient *c) { if (c->flags & REDIS_MASTER) { server.master = NULL; server.repl_state = REDIS_REPL_CONNECT; - server.repl_down_since = time(NULL); - /* Since we lost the connection with the master, we should also - * close the connection with all our slaves if we have any, so - * when we'll resync with the master the other slaves will sync again - * with us as well. Note that also when the slave is not connected - * to the master it will keep refusing connections by other slaves. + server.repl_down_since = server.unixtime; + /* We lost connection with our master, force our slaves to resync + * with us as well to load the new data set. * - * We do this only if server.masterhost != NULL. If it is NULL this - * means the user called SLAVEOF NO ONE and we are freeing our - * link with the master, so no need to close link with slaves. */ - if (server.masterhost != NULL) { - while (listLength(server.slaves)) { - ln = listFirst(server.slaves); - freeClient((redisClient*)ln->value); - } - } + * If server.masterhost is NULL the user called SLAVEOF NO ONE so + * slave resync is not needed. */ + if (server.masterhost != NULL) disconnectSlaves(); } /* If this client was scheduled for async freeing we need to remove it @@ -671,7 +687,7 @@ void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask) { } else { o = listNodeValue(listFirst(c->reply)); objlen = sdslen(o->ptr); - objmem = zmalloc_size(o->ptr); + objmem = zmalloc_size_sds(o->ptr); if (objlen == 0) { listDelNode(c->reply,listFirst(c->reply)); @@ -717,7 +733,7 @@ void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask) { return; } } - if (totwritten > 0) c->lastinteraction = time(NULL); + if (totwritten > 0) c->lastinteraction = server.unixtime; if (c->bufpos == 0 && listLength(c->reply) == 0) { c->sentlen = 0; aeDeleteFileEvent(server.el,c->fd,AE_WRITABLE); @@ -737,34 +753,6 @@ void resetClient(redisClient *c) { if (!(c->flags & REDIS_MULTI)) c->flags &= (~REDIS_ASKING); } -void closeTimedoutClients(void) { - redisClient *c; - listNode *ln; - time_t now = time(NULL); - listIter li; - - listRewind(server.clients,&li); - while ((ln = listNext(&li)) != NULL) { - c = listNodeValue(ln); - if (server.maxidletime && - !(c->flags & REDIS_SLAVE) && /* no timeout for slaves */ - !(c->flags & REDIS_MASTER) && /* no timeout for masters */ - !(c->flags & REDIS_BLOCKED) && /* no timeout for BLPOP */ - dictSize(c->pubsub_channels) == 0 && /* no timeout for pubsub */ - listLength(c->pubsub_patterns) == 0 && - (now - c->lastinteraction > server.maxidletime)) - { - redisLog(REDIS_VERBOSE,"Closing idle client"); - freeClient(c); - } else if (c->flags & REDIS_BLOCKED) { - if (c->bpop.timeout != 0 && c->bpop.timeout < now) { - addReply(c,shared.nullmultibulk); - unblockClientWaitingData(c); - } - } - } -} - int processInlineBuffer(redisClient *c) { char *newline = strstr(c->querybuf,"\r\n"); int argc, j; @@ -1012,6 +1000,7 @@ void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) { } qblen = sdslen(c->querybuf); + if (c->querybuf_peak < qblen) c->querybuf_peak = qblen; c->querybuf = sdsMakeRoomFor(c->querybuf, readlen); nread = read(fd, c->querybuf+qblen, readlen); if (nread == -1) { @@ -1029,7 +1018,7 @@ void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) { } if (nread) { sdsIncrLen(c->querybuf,nread); - c->lastinteraction = time(NULL); + c->lastinteraction = server.unixtime; } else { server.current_client = NULL; return; @@ -1070,14 +1059,9 @@ void getClientsMaxBuffers(unsigned long *longest_output_list, sds getClientInfoString(redisClient *client) { char ip[32], flags[16], events[3], *p; int port; - time_t now = time(NULL); int emask; - if (anetPeerToString(client->fd,ip,&port) == -1) { - ip[0] = '?'; - ip[1] = '\0'; - port = 0; - } + anetPeerToString(client->fd,ip,&port); p = flags; if (client->flags & REDIS_SLAVE) { if (client->flags & REDIS_MONITOR) @@ -1101,14 +1085,17 @@ sds getClientInfoString(redisClient *client) { if (emask & AE_WRITABLE) *p++ = 'w'; *p = '\0'; return sdscatprintf(sdsempty(), - "addr=%s:%d fd=%d idle=%ld flags=%s db=%d sub=%d psub=%d qbuf=%lu obl=%lu oll=%lu omem=%lu events=%s cmd=%s", + "addr=%s:%d fd=%d age=%ld idle=%ld flags=%s db=%d sub=%d psub=%d multi=%d qbuf=%lu qbuf-free=%lu obl=%lu oll=%lu omem=%lu events=%s cmd=%s", ip,port,client->fd, - (long)(now - client->lastinteraction), + (long)(server.unixtime - client->ctime), + (long)(server.unixtime - client->lastinteraction), flags, client->db->id, (int) dictSize(client->pubsub_channels), (int) listLength(client->pubsub_patterns), + (client->flags & REDIS_MULTI) ? client->mstate.count : -1, (unsigned long) sdslen(client->querybuf), + (unsigned long) sdsavail(client->querybuf), (unsigned long) client->bufpos, (unsigned long) listLength(client->reply), getClientOutputBufferMemoryUsage(client), @@ -1315,7 +1302,7 @@ int checkClientOutputBufferLimits(redisClient *c) { * called from contexts where the client can't be freed safely, i.e. from the * lower level functions pushing data inside the client output buffers. */ void asyncCloseClientOnOutputBufferLimitReached(redisClient *c) { - if (c->flags & REDIS_CLOSE_ASAP) return; + if (c->reply_bytes == 0 || c->flags & REDIS_CLOSE_ASAP) return; if (checkClientOutputBufferLimits(c)) { sds client = getClientInfoString(c);