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lsmemcache.cpp
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lsmemcache.cpp
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/*****************************************************************************
* Open LiteSpeed is an open source HTTP server. *
* Copyright (C) 2013 - 2015 LiteSpeed Technologies, Inc. *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see http://www.gnu.org/licenses/. *
*****************************************************************************/
#include <memcache/lsmemcache.h>
#include <shm/lsshmtidmgr.h>
#include <lsmcd.h>
#include <log4cxx/logger.h>
#include <lcrepl/usockmcd.h>
#include <lcrepl/lcreplconf.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <ctype.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <util/mysleep.h>
#include <edio/multiplexer.h>
#include <limits.h>
struct LsMcUpdOpt
{
uint16_t m_iFlags;
uint8_t m_iRetcode;
uint8_t m_notused;
void *m_pRet; // returned stuff
void *m_pMisc; // miscellaneous stuff
uint64_t m_value;
uint64_t m_cas;
};
#define UPDRET_DONE 0
#define UPDRET_NOTFOUND 1
#define UPDRET_NONNUMERIC 2
#define UPDRET_EEXISTS 3
#define UPDRET_CASFAIL UPDRET_EEXISTS
#define UPDRET_APPEND 10
#define UPDRET_PREPEND 11
#define UPDRET_NONE 20
#define UPDRET_INTERNAL_ERROR 0x84
typedef struct
{
uint32_t m_iSize; // total packet size
uint8_t m_flags;
uint8_t m_type;
uint16_t m_iKeySz;
uint64_t m_tid;
} LsShmPktHdr;
// m_type
#define LSSHM_PKTADD 0x00
#define LSSHM_PKTDEL 0x01
typedef struct
{
uint32_t m_iValSz;
uint32_t m_hkey; // hash key
uint32_t m_timestamp;
uint8_t m_data[0];
} LsShmTidAdd;
typedef struct
{
uint64_t m_tid;
} LsShmTidDel;
struct LsMcTidPkt
{
LsShmPktHdr m_hdr;
union
{
LsShmTidAdd m_add;
LsShmTidDel m_del;
};
uint8_t *getKey() const
{ return (uint8_t *)m_add.m_data; }
uint8_t *getVal() const
{ return (uint8_t *)m_add.m_data + m_hdr.m_iKeySz; }
};
typedef struct
{
LsShmSize_t x_iSize;
LsShmOffset_t x_iOff;
} LsMcTidInfoHelper;
#define ENDIAN_LITTLE
static uint64_t swap64(uint64_t val) {
#ifdef ENDIAN_LITTLE
int64_t ret = 0;
int i = 8;
while (--i >= 0)
{
ret = (ret << 8) | (val & 0xff);
val >>= 8;
}
return ret;
#else
return val;
#endif
}
uint64_t ntohll(uint64_t val)
{
return swap64(val);
}
uint64_t htonll(uint64_t val)
{
return swap64(val);
}
bool LsMemcache::m_bConfigMultiUser = false;
bool LsMemcache::m_bConfigReplication = false;
bool LsMemcache::m_dbgValidate = false;
ls_hash_t *LsMemcache::m_dbgValidateHash = NULL;
int LsMemcache::notImplemented(LsMemcache *pThis, ls_strpair_t *pInput, int arg,
MemcacheConn *pConn)
{
pThis->respond("NOT_IMPLEMENTED" "\r\n", pConn);
return 0;
}
//NOTICE: Any additions/changes need to be updated in the getCmdFunction definition.
LsMcCmdFunc LsMemcache::s_LsMcCmdFuncs[] =
{
{ "test1", sizeof("test1")-1, 0, doCmdTest1 },
{ "test2", sizeof("test2")-1, 0, doCmdTest2 },
{ "printtids", sizeof("printtids")-1, 0, doCmdPrintTids },
{ "get", sizeof("get")-1, MC_BINCMD_GET, doCmdGet },
{ "bget", sizeof("bget")-1, MC_BINCMD_GET, doCmdGet },
{ "gets", sizeof("gets")-1, MC_BINCMD_GET|LSMC_WITHCAS, doCmdGet },
{ "add", sizeof("add")-1, MC_BINCMD_ADD, doCmdUpdate },
{ "set", sizeof("set")-1, MC_BINCMD_SET, doCmdUpdate },
{ "replace", sizeof("replace")-1, MC_BINCMD_REPLACE, doCmdUpdate },
{ "append", sizeof("append")-1, MC_BINCMD_APPEND, doCmdUpdate },
{ "prepend", sizeof("prepend")-1, MC_BINCMD_PREPEND, doCmdUpdate },
{ "cas", sizeof("cas")-1, MC_BINCMD_REPLACE|LSMC_WITHCAS, doCmdUpdate },
{ "incr", sizeof("incr")-1, MC_BINCMD_INCREMENT, doCmdArithmetic },
{ "decr", sizeof("decr")-1, MC_BINCMD_DECREMENT, doCmdArithmetic },
{ "delete", sizeof("delete")-1, MC_BINCMD_DELETE, doCmdDelete },
{ "touch", sizeof("touch")-1, MC_BINCMD_TOUCH, doCmdTouch },
{ "stats", sizeof("stats")-1, MC_BINCMD_STAT, doCmdStats },
{ "flush_all", sizeof("flush_all")-1, 0, doCmdFlush },
{ "version", sizeof("version")-1, MC_BINCMD_VERSION, doCmdVersion },
{ "quit", sizeof("quit")-1, MC_BINCMD_QUIT, doCmdQuit },
{ "shutdown", sizeof("shutdown")-1, 0, notImplemented },
{ "verbosity", sizeof("verbosity")-1, MC_BINCMD_VERBOSITY, doCmdVerbosity },
{ "clear", sizeof("clear")-1, 0, doCmdClear },
};
const char errorStr[] = "ERROR\r\n";
const char badCmdLineFmt[] = "CLIENT_ERROR bad command line format\r\n";
const char tokNoreply[] = "noreply";
static inline bool chkNoreply(char *tokPtr, int tokLen)
{
return ((tokLen == sizeof(tokNoreply)-1)
&& (memcmp(tokPtr, tokNoreply, tokLen) == 0));
}
void LsMemcache::ackNoreply(MemcacheConn *pConn)
{
int len;
lenNbuf lenNbuf;
len = sizeof(lenNbuf.len); // no data, only ack
lenNbuf.len = (uint16_t)htons(len);
if (pConn->SendBuff((const char *)&lenNbuf, len, 0) != len)
{
LS_ERROR("SERVER_ERROR Unable to respond to client!\n");
}
return;
}
void LsMemcache::respond(const char *str, MemcacheConn *pConn)
{
int len;
lenNbuf lenNbuf;
if (m_noreply)
{
if (getVerbose(pConn) > 1)
{
LS_INFO(">%d NOREPLY %s", pConn->getfd(), str);
}
if (pConn->GetConnFlags() & CS_INTERNAL)
{
ackNoreply(pConn);
}
m_noreply = false;
}
else
{
if (getVerbose(pConn) > 1)
{
LS_INFO(">%d %s", pConn->getfd(), str);
}
len = strlen(str);
if (pConn->GetConnFlags() & CS_INTERNAL)
{
if ((unsigned int)len > sizeof(lenNbuf.buf))
{
str = "SERVER_ERROR Response too large\r\n";
len = strlen(str);
LS_ERROR("SERVER_ERROR Response too large!\n");
}
str = (const char *)buf2lenNbuf((char *)str, &len, &lenNbuf);
}
if (pConn->SendBuff(str, len, 0) != len)
{
LS_ERROR("SERVER_ERROR Unable to respond to client!\n");
}
}
return;
}
void LsMemcache::sendResult(MemcacheConn *pConn, const char *fmt, ...)
{
int len;
char buf[4096];
va_list va;
if (pConn->GetConnFlags() & CS_INTERNAL)
return;
va_start(va, fmt);
len = vsnprintf(buf, sizeof(buf), fmt, va);
if (len >= (int)(sizeof(buf) - 1))
{
LS_ERROR("SERVER_ERROR Truncated result to client!\n");
}
va_end(va);
LS_DBG_M("sendResult Respond, %d bytes\n", len);
if (pConn->appendOutput(buf, len) != len)
{
LS_ERROR("SERVER_ERROR Unable to send to client!\n");
}
}
void LsMemcache::binRespond(uint8_t *buf, int cnt, MemcacheConn *pConn)
{
if (m_noreply)
{
LS_DBG_M("binRespond, no reply\n");
if (pConn->GetConnFlags() & CS_INTERNAL)
{
ackNoreply(pConn);
}
m_noreply = false;
}
else
{
if (pConn->GetConnFlags() & CS_INTERNAL)
{
uint16_t len = htons(cnt+2);
LS_DBG_M("binRespond, internal, add len: %d\n", cnt);
pConn->appendOutput((char*)&len, 2);
}
LS_DBG_M("binRespond, %d bytes\n", cnt);
if (pConn->appendOutput((char *)buf, cnt) != cnt)
{
LS_ERROR("SERVER_ERROR Unable to send to client!\n");
}
}
return;
}
void LsMemcache::fwdCommand(LsMcHashSlice *pSlice, const char *buf, int len,
MemcacheConn *pConn)
{
if (!LsMemcache::getConfigReplication())
return;
if (getVerbose(pConn) > 1)
{
LS_INFO(">%d (fwd) %.*s", pSlice->m_pConnSlaveToMaster->getfd(),
(isprint(*buf) ? len : 0), buf);
}
if (pSlice->m_pConnSlaveToMaster->SendBuff(buf, len, 0) != len)
LS_ERROR("SERVER_ERROR Unable to fwd to remote!\n");
else
{
pConn->SetRespWait();
pSlice->m_pConnSlaveToMaster->SetLink(pConn);
pSlice->m_pConnSlaveToMaster->SetRemoteBusy();
}
return;
}
int LsMemcache::processInternal(
uint8_t *pBuf, int iLen, MemcacheConn *pConn)
{
MemcacheConn *pLink;
lenNbuf *ptr = (lenNbuf *)pBuf;
LS_DBG_M("processInternal iLen1:%d, bufLen:%zd", iLen, sizeof(ptr->len));
if (iLen < (int)sizeof(ptr->len))
return -1;
int len = ntohs(ptr->len);
LS_DBG_M("processInternal iLen2:%d, orig Len:%d, conv Len:%d", iLen,
ptr->len, len);
if (iLen < len)
return -1;
len -= sizeof(ptr->len);
LS_DBG_M("INTERNAL: size=%d [%.*s]\n", len,
(isprint(*ptr->buf) ? len : 0), ptr->buf);
if ((pLink = pConn->GetLink()) == NULL)
{
LS_ERROR("No Link to send response to!\n");
}
else
{
LS_DBG_M("processInternal ClrRespWait addr:%p", pLink);
pLink->ClrRespWait();
if ((len > 0) && (pLink->SendBuff(ptr->buf, len, 0) != len))
LS_ERROR("SERVER_ERROR Unable to respond to link!\n");
}
pConn->ClrRemoteBusy();
m_noreply = false;
return len + sizeof(ptr->len);
}
LsMemcache::LsMemcache()
: m_pWaitQ(NULL)
, m_pWaitTail(NULL)
, m_pStrt(NULL)
, m_hkey(0)
, m_rescas(0)
, m_needed(0)
, m_retcode(0)
, m_noreply(false)
, m_keyPool()
, m_keyList(10)
{
m_iterOff.m_iOffset = 0;
ls_str_blank(&m_parms.key);
ls_str_blank(&m_parms.val);
m_mcparms.m_usecas = false;
m_mcparms.m_usesasl = false;
m_mcparms.m_nomemfail = false;
m_mcparms.m_iValMaxSz = VAL_MAXSIZE;
m_mcparms.m_iMemMaxSz = MEM_MAXSIZE;
m_mcparms.m_userSize = USER_SIZE;
m_mcparms.m_hashSize = HASH_SIZE;
}
static const char *g_pShmName = "SHMMCTEST";
static const char *g_pHashName = "SHMMCHASH";
void LsMemcache::notifyChange(MemcacheConn *pConn)
{
// This function is only about replication
if (!getConfigReplication())
return;
LS_DBG_M("LsMemcache::notifyChange pid:%d, pHash:%p is %s, sliceIdx:%d",
getpid(), pConn->getHash(),
pConn->getHash()->isTidMaster() ? "master" : "slave",
pConn->getSlice()->m_idx);
if (pConn->getHash()->isTidMaster())
{
Lsmcd::getInstance().getUsockConn()->cachedNotifyData(
Lsmcd::getInstance().getProcId(), pConn->getSlice()->m_idx );
}
}
bool LsMemcache::multiValidate(LsMcHashSlice *pSlice, MemcacheConn *pConn)
{
if ((!pConn) || (pConn->getSlice() != pSlice) || (!pConn->getHash()))
return false;
return true;
}
int LsMemcache::multiInitFunc(LsMcHashSlice *pSlice, MemcacheConn *pConn,
void *pArg)
{
// This is initialization and it doesn't use the pConn - no need to validate
LsShmHash *pHash = pSlice->m_hashByUser.getHash(NULL);
if (!pConn)
pConn = pSlice->m_pConnSlaveToMaster;
pConn->setHash(pSlice->m_hashByUser.getHash(NULL));
LsMcParms *pParms = (LsMcParms *)pArg;
LsShmSize_t size;
LsShmOffset_t off, iHelperOff;
LsMcTidInfoHelper *pHelper;
char *fileName = (char *)pHash->getPool()->getShm()->fileName();
LsMcHdr *pHdr;
int ret = LS_OK;
LS_DBG_M("ShmSlice: [%s].\n", fileName);
pHash->disableAutoLock();
pHash->lockChkRehash();
iHelperOff = pHash->getHTableReservedOffset();
pHelper = (LsMcTidInfoHelper *)pHash->offset2ptr(iHelperOff);
off = pHelper->x_iOff;
if (off == 0)
{
int remapped;
size = LsShmPool::size2roundSize(sizeof(*pHdr));
if (pParms->m_usecas)
size += sizeof(pHdr->x_data->cas);
// if (mode & LSSHM_TID_MODE)
size += sizeof(LsShmTidInfo);
if ((off = pHash->alloc2(size, remapped)) != 0)
{
// if (mode & LSSHM_TID_MODE)
{
pHash->getTidMgr()->init(pHash,
off + size - sizeof(LsShmTidInfo), true);
}
pHdr = (LsMcHdr *)pHash->offset2ptr(off);
pHdr->x_verbose = 0;
pHdr->x_withcas = pParms->m_usecas;
pHdr->x_withsasl = pParms->m_usesasl;
memset((void *)&pHdr->x_dstaddr, 0, sizeof(pHdr->x_dstaddr));
memset((void *)&pHdr->x_stats, 0, sizeof(pHdr->x_stats));
if (pParms->m_usecas)
pHdr->x_data->cas = 0;
pHelper->x_iOff = off;
pHelper->x_iSize = size;
}
}
else
{
// if (mode & LSSHM_TID_MODE)
{
pHash->getTidMgr()->init(pHash,
off + pHelper->x_iSize - sizeof(LsShmTidInfo), false);
}
pHdr = (LsMcHdr *)pHash->offset2ptr(off);
if (pHdr->x_withcas != pParms->m_usecas)
{
LS_ERROR("MisMatch: existing database %sUSING cas.\n",
(pHdr->x_withcas ? "" : "NOT "));
ret = LS_FAIL;
}
if (pHdr->x_withsasl != pParms->m_usesasl)
{
LS_ERROR("MisMatch: existing database %sUSING sasl.\n",
(pHdr->x_withsasl ? "" : "NOT "));
ret = LS_FAIL;
}
}
pHash->unlock();
pHash->enableAutoLock();
pConn->setHdrOff(off);
LS_DBG_M("SetHdrOff: %d for pConn: %p\n", off, pConn);
return ((off != 0) ? ret : LS_FAIL);
}
int LsMemcache::initMcShm(int iCnt, const char **ppPathName,
const char *pHashName, LsMcParms *pParms)
{
if (pParms->m_dbgValidate && !m_dbgValidateHash)
{
m_dbgValidateHash = ls_hash_new(100, ls_hash_hfstring, ls_hash_cmpstring, NULL);
if (!m_dbgValidateHash)
{
LS_ERROR("Unable to create validation hash\n");
return -1;
}
LS_NOTICE("Doing Debug Validation\n");
}
setConfigMultiUser(pParms->m_usesasl && pParms->m_byUser);
if ((getConfigMultiUser()) &&
(getConfigReplication()))
{
LS_ERROR("It is invalid to configure replication (multiple LbAddrs) and"
" multi-user\n");
return -1;
}
if (pHashName == NULL)
pHashName = (char *)g_pHashName;
int mode = (LSSHM_FLAG_TID|LSSHM_FLAG_LRU);//|LSSHM_FLAG_TID_SLAVE);
m_pHashMulti = new LsMcHashMulti;
if (m_pHashMulti->init(iCnt, ppPathName, pHashName, LsShmHash::hashXXH32,
memcmp, mode, pParms->m_userSize,
pParms->m_hashSize) != LS_OK)
{
delete m_pHashMulti;
m_pHashMulti = NULL;
return -1;
}
m_mcparms.m_usecas = pParms->m_usecas;
m_mcparms.m_usesasl = pParms->m_usesasl;
m_mcparms.m_anonymous = pParms->m_anonymous;
m_mcparms.m_byUser = pParms->m_byUser;
m_mcparms.m_nomemfail = pParms->m_nomemfail;
if (pParms->m_iValMaxSz >= 0)
m_mcparms.m_iValMaxSz = pParms->m_iValMaxSz;
if (pParms->m_iMemMaxSz > 0)
m_mcparms.m_iMemMaxSz = pParms->m_iMemMaxSz;
if (pParms->m_userSize > 0)
m_mcparms.m_userSize = pParms->m_userSize;
if (pParms->m_hashSize > 0)
m_mcparms.m_hashSize = pParms->m_hashSize;
#ifdef USE_SASL
LS_DBG_M("SASL defined: %s\n",m_mcparms.m_usesasl ? "YES" : "NO");
//setVerbose(getVerbose(pConn));
if (m_mcparms.m_usesasl && (LsMcSasl::initSasl() < 0))
{
LS_DBG_M("initSASL FAILED!\n");
delete m_pHashMulti;
m_pHashMulti = NULL;
return -1;
}
#endif
return 0;
}
int LsMemcache::initMcShm(const char *pDirName, const char *pShmName,
const char *pHashName, LsMcParms *pParms)
{
char achDefaultDir[255];
if (pDirName == NULL)
{
if ((pDirName = LsShm::detectDefaultRamdisk()) == NULL)
pDirName = "/tmp";
snprintf(achDefaultDir, sizeof(achDefaultDir), "%s/lsmcd", pDirName);
pDirName = achDefaultDir;
LsShm::addBaseDir(pDirName);
}
if (pShmName == NULL)
pShmName = g_pShmName;
if (pHashName == NULL)
pHashName = g_pHashName;
char achShmFileName[255];
snprintf(achShmFileName, sizeof(achShmFileName), "%s/%s",
pDirName, pShmName);
pShmName = achShmFileName;
return initMcShm(1, (const char **)&pShmName, pHashName, pParms);
}
int LsMemcache::multiMultiplexerFunc(LsMcHashSlice *pSlice, MemcacheConn *pConn,
void *pArg)
{
// pConn as a parameter is to fill out the parameters - pConn is required
// of all foreach functions.
LS_DBG_M("multiMultiplexerFunc\n");
pSlice->m_pConnSlaveToMaster = new MemcacheConn();
pSlice->m_pConnSlaveToMaster->SetMultiplexer((Multiplexer *)pArg);
pSlice->m_pConnSlaveToMaster->setSlice(pSlice);
pSlice->m_pConnSlaveToMaster->setHash(pSlice->m_hashByUser.getHash(NULL));
return LS_OK;
}
int LsMemcache::multiConnFunc(LsMcHashSlice *pSlice, MemcacheConn *pConn,
void *pArg)
{
pSlice->m_pConnSlaveToMaster->SetMultiplexer((Multiplexer *)pArg);
return LS_OK;
}
int LsMemcache::reinitMcConn(Multiplexer *pMultiplexer)
{
return m_pHashMulti->foreach(multiConnFunc, NULL, (void *)pMultiplexer);
}
int LsMemcache::initMcEvents()
{
Multiplexer *pMultiplexer;
if ((pMultiplexer = m_pHashMulti->getMultiplexer()) == NULL)
return LS_FAIL;
if (m_pHashMulti->foreach(multiMultiplexerFunc, NULL,
(void *)pMultiplexer) == LS_FAIL)
return -1;
LsMcParms *pMcParms = &m_mcparms;
return m_pHashMulti->foreach(multiInitFunc, NULL, (void *)pMcParms);
}
int LsMemcache::setSliceDst(int which, char *pAddr, MemcacheConn *pConn)
{
if (!pConn)
/* Allow this to work when you don't have a connection. Use the default
for the slice */
pConn = m_pHashMulti->indx2hashSlice(which)->m_pConnSlaveToMaster;
if ((m_pHashMulti == NULL) || (which >= m_pHashMulti->getMultiCnt()))
return LS_FAIL;
LsMcHashSlice *pSlice = m_pHashMulti->indx2hashSlice(which);
LsShmHash *pHash = pSlice->m_hashByUser.getHash(pConn->getUser());
uint8_t *pDstAddr =
((LsMcHdr *)pHash->offset2ptr(pConn->getHdrOff()))->x_dstaddr;
if (*pDstAddr != 0)
{
LS_DBG_M("closing slice[%d] last svr addr [%s].\n", which, pDstAddr);
pSlice->m_pConnSlaveToMaster->CloseConnection();
*pDstAddr = 0;
}
pHash->setTidMaster();
DispatchData_t dispData;
dispData.x_procId = Lsmcd::getInstance().getProcId();
dispData.x_sliceId = which;
if (pAddr != NULL)
{
GSockAddr dstAddr;
if ((dstAddr.set(pAddr, 0) < 0)
|| (dstAddr.toString((char *)pDstAddr, DSTADDR_MAXLEN) == NULL))
return LS_FAIL;
if (pSlice->m_pConnSlaveToMaster->connectTo(&dstAddr) < 0)
{
LS_ERROR("pid:%d, slice[%d] Unable to connect to [%s]!\n", getpid(),
which, pAddr);
}
else
{
LS_DBG_M("pid:%d, slice[%d] Trying to connect to [%s].\n", getpid(),
which, pAddr);
if (pSlice->m_pConnSlaveToMaster->SendBuff((char *)&dispData,
sizeof(dispData), 0) != sizeof(dispData))
{
LS_ERROR("SERVER_ERROR Unable to connect fdpass listener!\n");
}
my_sleep(100);
pSlice->m_pConnSlaveToMaster->SetConnInternal();
uint8_t flag = MC_INTERNAL_REQ;
if (pSlice->m_pConnSlaveToMaster->SendBuff((char *)&flag, 1, 0) != 1)
{
LS_ERROR("SERVER_ERROR Unable to init remote!\n");
}
else
{
LS_DBG_M("pid:%d, slice:%d, pConn Addr:%p, cached is connected "
"to peer master", getpid(), which,
pSlice->m_pConnSlaveToMaster );
}
}
pHash->setTidSlave();
}
LS_DBG_M("LsMemcache::setSliceDst pid:%d, procId:%d, pSlice->m_idx:%d, "
"which:%d, pAddr:%s, result role:%d", getpid(), dispData.x_procId,
pSlice->m_idx, which, pAddr, pHash->isTidMaster());
return LS_OK;
}
bool LsMemcache::isSliceRemote(LsMcHashSlice *pSlice)
{
return (pSlice->m_pConnSlaveToMaster->GetConnState() == MemcacheConn::CS_CONNECTED);
}
bool LsMemcache::fwdToRemote(LsMcHashSlice *pSlice, char *pNxt,
MemcacheConn *pConn)
{
if (LsMemcache::getConfigReplication() && !pConn->getHash()->isTidMaster())
{
if (isSliceRemote(pSlice))
{
pNxt[-1] = '\n';
fwdCommand(pSlice, m_pStrt, pNxt - m_pStrt, pConn);
}
else
{
LS_ERROR("Unable to forward to remote\n");
respond("SERVER_ERROR unable to forward" "\r\n", pConn);
}
return true;
}
return false;
}
bool LsMemcache::fwdBinToRemote(LsMcHashSlice *pSlice, McBinCmdHdr *pHdr,
MemcacheConn *pConn)
{
if (!pConn->getHash()->isTidMaster())
{
if (isSliceRemote(pSlice))
{
fwdCommand(pSlice, (const char *)pHdr,
sizeof(*pHdr) + ntohl(pHdr->totbody), pConn);
}
else
{
LS_ERROR("Unable to forward to remote\n");
binErrRespond(pHdr, MC_BINSTAT_REMOTEERROR, pConn);
}
return true;
}
return false;
}
void LsMemcache::putWaitQ(MemcacheConn *pConn)
{
LS_DBG_M("putWaitQ\n");
if (pConn->GetConnFlags() & CS_CMDWAIT) // already on queue
return;
pConn->SetCmdWait();
pConn->SetLink(NULL);
if (m_pWaitQ == NULL)
m_pWaitQ = pConn;
else
m_pWaitTail->SetLink(pConn);
m_pWaitTail = pConn;
return;
}
void LsMemcache::processWaitQ()
{
MemcacheConn *pNext;
MemcacheConn *pConn = m_pWaitQ;
m_pWaitQ = NULL;
m_pWaitTail = NULL;
while (pConn != NULL)
{
pNext = pConn->GetLink();
pConn->ClrCmdWait();
pConn->SetLink(NULL);
pConn->processIncoming();
pConn = pNext;
}
return;
}
void LsMemcache::onTimer()
{
static time_t lastTime = time(NULL);
time_t curTime = time(NULL);
if (lastTime + 30 < curTime)
{
m_keyPool.shrinkTo(10);
lastTime = curTime;
}
}
int LsMemcache::validateDb(MemcacheConn *pConn)
{
if (pConn->getHdrOff() == 0)
{
LS_DBG("validateDb, Header not set yet, ok\n");
return 0;
}
LsMcHdr *pHdr = ((LsMcHdr *)pConn->getHash()->offset2ptr(pConn->getHdrOff()));
int ret = 0;
if (pHdr->x_withcas != m_mcparms.m_usecas)
{
LS_NOTICE("MisMatch: shared database %sUSING cas - rebuilding.\n",
(pHdr->x_withcas ? "" : "NOT "));
ret = LS_FAIL;
} else if (pHdr->x_withsasl != m_mcparms.m_usesasl)
{
LS_NOTICE("MisMatch: shared database %sUSING sasl - rebuilding.\n",
(pHdr->x_withsasl ? "" : "NOT "));
ret = LS_FAIL;
}
if (ret != 0)
pConn->getHash()->rebuild();
LS_DBG_M("validateDb ok\n");
return ret;
}
int LsMemcache::processCmd(char *pStr, int iLen, MemcacheConn *pConn)
{
int datasz;
int consumed;
char *endp;
char *pCmd;
size_t len;
LsMcCmdFunc *p;
ls_strpair_t input;
LS_DBG_M("Enter processCmd\n");
if (m_mcparms.m_usesasl && !m_mcparms.m_anonymous)
{
const char *message = "ASCII messages will not be processed with SASL "
"enabled\n";
LS_DBG_M("%s", message);
respond(message, pConn);
return 0; // To exit immediately
}
if ((endp = (char *)memchr(pStr, '\n', iLen)) == NULL)
return -1; // need more data
consumed = endp - pStr + 1;
*endp = '\0';
if ((consumed > 1) && (endp[-1] == '\r'))
endp[-1] = '\0';
if (getVerbose(pConn) > 1)
{
LS_INFO("<%d %s\n", pConn->getfd(), pStr);
}
m_pStrt = pStr; // save for possible fwd
pStr = advToken(pStr, endp - 1, &pCmd, &len);
input.key.ptr = pStr;
if (len == 0)
{
LS_DBG_M("Exit processCmd - no message\n");
return consumed;
}
if ((p = getCmdFunction(pCmd, len)) == NULL)
{
respond(errorStr, pConn);
pConn->Flush();
LS_DBG_M("Exit processCmd - no function\n");
return consumed;
}
input.key.len = endp - input.key.ptr - 1;
input.val.ptr = endp + 1;
input.val.len = iLen - consumed;
setSlice(input.key.ptr, input.key.len, pConn);
if ((datasz =
(*p->func)(this, &input, p->arg, pConn)) >= 0)
// (*p->func)(this, pStr, endp + 1, iLen - consumed, p->arg)) >= 0)
{
pConn->Flush();
LS_DBG_M("Exit processCmd - did function created data\n");
return consumed + datasz;
}
if (datasz == -1) // need more data
{
*endp = '\n'; // restore for next time
LS_DBG_M("Exit processCmd - did function but ERROR!\n");
return -1;
}
LS_DBG_M("Exit processCmd - did function no data\n");
return 0; // else close connection
}
LsMcCmdFunc *LsMemcache::getCmdFunction(const char *pCmd, int len)
{
LsMcCmdFunc *p;
int iPossible, iOffset = 1;
if ((pCmd == NULL) || (len < 3))
return NULL;
switch (*pCmd)
{
case 'b': // bget
iPossible = 4;
break;
case 'f': // flush_all
iPossible = 17;
break;
case 'i': // incr
iPossible = 12;
break;
case 'q': // quit
iPossible = 19;
break;
case 'r': // replace
iPossible = 8;
break;
case 'a': // add append
if ((*(pCmd + 1) == 'd'))
iPossible = 6;
else if ((*(pCmd + 1) == 'p'))
iPossible = 9;
else
return NULL;
iOffset = 2;
break;
case 'c': // cas clear
if (*(pCmd + 1) == 'a')
iPossible = 11;
else if (*(pCmd + 1) == 'l')
iPossible = 22;
else
return NULL;
iOffset = 2;
break;
case 'd': // decr delete
if (*(pCmd + 1) != 'e')
return NULL;
else if (*(pCmd + 2) == 'c')
iPossible = 13;
else if (*(pCmd + 2) == 'l')
iPossible = 14;
else
return NULL;
iOffset = 3;
break;
case 'p': // printtids prepend
if (*(pCmd + 1) != 'r')
return NULL;
else if (*(pCmd + 2) == 'i')
iPossible = 2;
else if (*(pCmd + 2) == 'e')
iPossible = 10;
else
return NULL;
iOffset = 3;
break;
case 's': // set stats shutdown
switch (*(pCmd + 1))
{
case 'e':
iPossible = 7;
break;
case 't':
iPossible = 16;
break;
case 'h':
iPossible = 20;
break;
default:
return NULL;
};
iOffset = 2;
break;
case 'v': // version verbosity
if ((len < 7) || (memcmp("er", pCmd + 1, 2) != 0))
return NULL;
else if (pCmd[3] == 's')
iPossible = 18;
else if (pCmd[3] == 'b')
iPossible = 21;
else
return NULL;
iOffset = 4;
break;
case 't': // test1 test2 touch
if ((*(pCmd + 1)) == 'o')
iPossible = 15;
else if ((len != 5) || (memcmp("est", pCmd + 1, 3) != 0))
return NULL;
else if (pCmd[4] == '1')
return &s_LsMcCmdFuncs[0];
else if (pCmd[4] == '2')
return &s_LsMcCmdFuncs[1];
else
return NULL;
iOffset = 2;
break;
case 'g': // get gets
if (memcmp("et", pCmd + 1, 2) == 0)
{
if (len == 3)
return &s_LsMcCmdFuncs[3];
else if ((len == 4) && (pCmd[3] == 's'))
return &s_LsMcCmdFuncs[5];
}
// fall through
default:
return NULL;
};
p = &s_LsMcCmdFuncs[iPossible];
if ((len == p->len)
&& (memcmp(pCmd + iOffset, p->cmd + iOffset, len - iOffset) == 0))
return p;
return NULL;
}
/*
* this code needs the lock continued from the parsed command function.
*/
int LsMemcache::doDataUpdate(uint8_t *pBuf, MemcacheConn *pConn)