/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */

// can be removed if DBTUP continueB codes are moved to signaldata
#define DBTUP_C

#include "DbtupProxy.hpp"
#include "Dbtup.hpp"
#include <pgman.hpp>
#include <signaldata/LgmanContinueB.hpp>

#include <EventLogger.hpp>
extern EventLogger * g_eventLogger;

DbtupProxy::DbtupProxy(Block_context& ctx) :
  LocalProxy(DBTUP, ctx),
  c_pgman(0),
  c_tableRecSize(0),
  c_tableRec(0)
{
  // GSN_CREATE_TAB_REQ
  addRecSignal(GSN_CREATE_TAB_REQ, &DbtupProxy::execCREATE_TAB_REQ);
  addRecSignal(GSN_DROP_TAB_REQ, &DbtupProxy::execDROP_TAB_REQ);

  // GSN_BUILD_INDX_IMPL_REQ
  addRecSignal(GSN_BUILD_INDX_IMPL_REQ, &DbtupProxy::execBUILD_INDX_IMPL_REQ);
  addRecSignal(GSN_BUILD_INDX_IMPL_CONF, &DbtupProxy::execBUILD_INDX_IMPL_CONF);
  addRecSignal(GSN_BUILD_INDX_IMPL_REF, &DbtupProxy::execBUILD_INDX_IMPL_REF);
}

DbtupProxy::~DbtupProxy()
{
}

SimulatedBlock*
DbtupProxy::newWorker(Uint32 instanceNo)
{
  return new Dbtup(m_ctx, instanceNo);
}

// GSN_READ_CONFIG_REQ
void
DbtupProxy::callREAD_CONFIG_REQ(Signal* signal)
{
  const ReadConfigReq* req = (const ReadConfigReq*)signal->getDataPtr();
  ndbrequire(req->noOfParameters == 0);

  const ndb_mgm_configuration_iterator * p = 
    m_ctx.m_config.getOwnConfigIterator();
  ndbrequire(p != 0);
  
  ndbrequire(!ndb_mgm_get_int_parameter(p, CFG_TUP_TABLE, &c_tableRecSize));
  c_tableRec = (Uint8*)allocRecord("TableRec", sizeof(Uint8), c_tableRecSize);
  D("proxy:" << V(c_tableRecSize));
  Uint32 i;
  for (i = 0; i < c_tableRecSize; i++)
    c_tableRec[i] = 0;
  backREAD_CONFIG_REQ(signal);
}

// GSN_STTOR

void
DbtupProxy::callSTTOR(Signal* signal)
{
  Uint32 startPhase = signal->theData[1];
  switch (startPhase) {
  case 1:
    c_pgman = (Pgman*)globalData.getBlock(PGMAN);
    ndbrequire(c_pgman != 0);
    break;
  }
  backSTTOR(signal);
}

// GSN_CREATE_TAB_REQ

void
DbtupProxy::execCREATE_TAB_REQ(Signal* signal)
{
  const CreateTabReq* req = (const CreateTabReq*)signal->getDataPtr();
  const Uint32 tableId = req->tableId;
  ndbrequire(tableId < c_tableRecSize);
  ndbrequire(c_tableRec[tableId] == 0);
  c_tableRec[tableId] = 1;
  D("proxy: created table" << V(tableId));
}

void
DbtupProxy::execDROP_TAB_REQ(Signal* signal)
{
  const DropTabReq* req = (const DropTabReq*)signal->getDataPtr();
  const Uint32 tableId = req->tableId;
  ndbrequire(tableId < c_tableRecSize);
  c_tableRec[tableId] = 0;
  D("proxy: dropped table" << V(tableId));
}

// GSN_BUILD_INDX_IMPL_REQ

void
DbtupProxy::execBUILD_INDX_IMPL_REQ(Signal* signal)
{
  const BuildIndxImplReq* req = (const BuildIndxImplReq*)signal->getDataPtr();
  Ss_BUILD_INDX_IMPL_REQ& ss = ssSeize<Ss_BUILD_INDX_IMPL_REQ>();
  ss.m_req = *req;
  ndbrequire(signal->getLength() == BuildIndxImplReq::SignalLength);
  sendREQ(signal, ss);
}

void
DbtupProxy::sendBUILD_INDX_IMPL_REQ(Signal* signal, Uint32 ssId,
                                    SectionHandle* handle)
{
  Ss_BUILD_INDX_IMPL_REQ& ss = ssFind<Ss_BUILD_INDX_IMPL_REQ>(ssId);

  BuildIndxImplReq* req = (BuildIndxImplReq*)signal->getDataPtrSend();
  *req = ss.m_req;
  req->senderRef = reference();
  req->senderData = ssId;
  sendSignalNoRelease(workerRef(ss.m_worker), GSN_BUILD_INDX_IMPL_REQ,
                      signal, BuildIndxImplReq::SignalLength, JBB, handle);
}

void
DbtupProxy::execBUILD_INDX_IMPL_CONF(Signal* signal)
{
  const BuildIndxImplConf* conf = (const BuildIndxImplConf*)signal->getDataPtr();
  Uint32 ssId = conf->senderData;
  Ss_BUILD_INDX_IMPL_REQ& ss = ssFind<Ss_BUILD_INDX_IMPL_REQ>(ssId);
  recvCONF(signal, ss);
}

void
DbtupProxy::execBUILD_INDX_IMPL_REF(Signal* signal)
{
  const BuildIndxImplRef* ref = (const BuildIndxImplRef*)signal->getDataPtr();
  Uint32 ssId = ref->senderData;
  Ss_BUILD_INDX_IMPL_REQ& ss = ssFind<Ss_BUILD_INDX_IMPL_REQ>(ssId);
  recvREF(signal, ss, ref->errorCode);
}

void
DbtupProxy::sendBUILD_INDX_IMPL_CONF(Signal* signal, Uint32 ssId)
{
  Ss_BUILD_INDX_IMPL_REQ& ss = ssFind<Ss_BUILD_INDX_IMPL_REQ>(ssId);
  BlockReference dictRef = ss.m_req.senderRef;

  if (!lastReply(ss))
    return;

  if (ss.m_error == 0) {
    jam();
    BuildIndxImplConf* conf = (BuildIndxImplConf*)signal->getDataPtrSend();
    conf->senderRef = reference();
    conf->senderData = ss.m_req.senderData;
    sendSignal(dictRef, GSN_BUILD_INDX_IMPL_CONF,
               signal, BuildIndxImplConf::SignalLength, JBB);
  } else {
    BuildIndxImplRef* ref = (BuildIndxImplRef*)signal->getDataPtrSend();
    ref->senderRef = reference();
    ref->senderData = ss.m_req.senderData;
    ref->errorCode = ss.m_error;
    sendSignal(dictRef, GSN_BUILD_INDX_IMPL_REF,
               signal, BuildIndxImplRef::SignalLength, JBB);
  }

  ssRelease<Ss_BUILD_INDX_IMPL_REQ>(ssId);
}

// client methods

// LGMAN

DbtupProxy::Proxy_undo::Proxy_undo()
{
  m_type = 0;
  m_len = 0;
  m_ptr = 0;
  m_lsn = (Uint64)0;
  m_key.setNull();
  m_page_id = ~(Uint32)0;
  m_table_id = ~(Uint32)0;
  m_fragment_id = ~(Uint32)0;
  m_instance_no = ~(Uint32)0;
  m_actions = 0;
  m_in_use = false;
}

void
DbtupProxy::disk_restart_undo(Signal* signal, Uint64 lsn,
                              Uint32 type, const Uint32 * ptr, Uint32 len)
{
  Proxy_undo& undo = c_proxy_undo;
  ndbrequire(!undo.m_in_use);
  new (&undo) Proxy_undo;
  undo.m_in_use = true;

  D("proxy: disk_restart_undo" << V(type) << hex << V(ptr) << dec << V(len) << V(lsn));
  undo.m_type = type;
  undo.m_len = len;
  undo.m_ptr = ptr;
  undo.m_lsn = lsn;

  /*
   * The timeslice via PGMAN/5 gives LGMAN a chance to overwrite the
   * data pointed to by ptr.  So save it now and do not use ptr.
   */
  ndbrequire(undo.m_len <= Proxy_undo::MaxData);
  memcpy(undo.m_data, undo.m_ptr, undo.m_len << 2);

  switch (undo.m_type) {
  case File_formats::Undofile::UNDO_LCP_FIRST:
  case File_formats::Undofile::UNDO_LCP:
    {
      undo.m_table_id = ptr[1] >> 16;
      undo.m_fragment_id = ptr[1] & 0xFFFF;
      undo.m_actions |= Proxy_undo::SendToAll;
      undo.m_actions |= Proxy_undo::SendUndoNext;
    }
    break;
  case File_formats::Undofile::UNDO_TUP_ALLOC:
    {
      const Dbtup::Disk_undo::Alloc* rec =
        (const Dbtup::Disk_undo::Alloc*)ptr;
      undo.m_key.m_file_no = rec->m_file_no_page_idx >> 16;
      undo.m_key.m_page_no = rec->m_page_no;
      undo.m_key.m_page_idx = rec->m_file_no_page_idx & 0xFFFF;
      undo.m_actions |= Proxy_undo::ReadTupPage;
      undo.m_actions |= Proxy_undo::GetInstance;
    }
    break;
  case File_formats::Undofile::UNDO_TUP_UPDATE:
    {
      const Dbtup::Disk_undo::Update* rec =
        (const Dbtup::Disk_undo::Update*)ptr;
      undo.m_key.m_file_no = rec->m_file_no_page_idx >> 16;
      undo.m_key.m_page_no = rec->m_page_no;
      undo.m_key.m_page_idx = rec->m_file_no_page_idx & 0xFFFF;
      undo.m_actions |= Proxy_undo::ReadTupPage;
      undo.m_actions |= Proxy_undo::GetInstance;
    }
    break;
  case File_formats::Undofile::UNDO_TUP_FREE:
    {
      const Dbtup::Disk_undo::Free* rec =
        (const Dbtup::Disk_undo::Free*)ptr;
      undo.m_key.m_file_no = rec->m_file_no_page_idx >> 16;
      undo.m_key.m_page_no = rec->m_page_no;
      undo.m_key.m_page_idx = rec->m_file_no_page_idx & 0xFFFF;
      undo.m_actions |= Proxy_undo::ReadTupPage;
      undo.m_actions |= Proxy_undo::GetInstance;
    }
    break;

  case File_formats::Undofile::UNDO_TUP_CREATE:
  {
    jam();
    Dbtup::Disk_undo::Create* rec= (Dbtup::Disk_undo::Create*)ptr;
    Uint32 tableId = rec->m_table;
    if (tableId < c_tableRecSize)
    {
      jam();
      c_tableRec[tableId] = 0;
    }
    
    undo.m_actions |= Proxy_undo::SendToAll;
    undo.m_actions |= Proxy_undo::SendUndoNext;
    break;
  }
  case File_formats::Undofile::UNDO_TUP_DROP:
  {
    jam();
    Dbtup::Disk_undo::Drop* rec= (Dbtup::Disk_undo::Drop*)ptr;
    Uint32 tableId = rec->m_table;
    if (tableId < c_tableRecSize)
    {
      jam();
      c_tableRec[tableId] = 0;
    }
    
    undo.m_actions |= Proxy_undo::SendToAll;
    undo.m_actions |= Proxy_undo::SendUndoNext;
    break;
  }
#if NOT_YET_UNDO_ALLOC_EXTENT
  case File_formats::Undofile::UNDO_TUP_ALLOC_EXTENT:
    ndbrequire(false);
    break;
#endif
#if NOT_YET_UNDO_FREE_EXTENT
  case File_formats::Undofile::UNDO_TUP_FREE_EXTENT:
    ndbrequire(false);
    break;
#endif
  case File_formats::Undofile::UNDO_END:
    {
      undo.m_actions |= Proxy_undo::SendToAll;
    }
    break;
  default:
    ndbrequire(false);
    break;
  }

  if (undo.m_actions & Proxy_undo::ReadTupPage) {
    jam();
    /*
     * Page request goes to the extra PGMAN worker (our thread).
     * TUP worker reads same page again via another PGMAN worker.
     * MT-LGMAN is planned, do not optimize (pass page) now
     */
    Page_cache_client pgman(this, c_pgman);
    Page_cache_client::Request req;

    req.m_page = undo.m_key;
    req.m_callback.m_callbackData = 0;
    req.m_callback.m_callbackFunction = 
      safe_cast(&DbtupProxy::disk_restart_undo_callback);

    int ret = pgman.get_page(signal, req, 0);
    ndbrequire(ret >= 0);
    if (ret > 0) {
      jam();
      execute(signal, req.m_callback, (Uint32)ret);
    }
    return;
  }

  disk_restart_undo_finish(signal);
}

void
DbtupProxy::disk_restart_undo_callback(Signal* signal, Uint32, Uint32 page_id)
{
  Proxy_undo& undo = c_proxy_undo;
  undo.m_page_id = page_id;

  Ptr<GlobalPage> gptr;
  m_global_page_pool.getPtr(gptr, undo.m_page_id);

  ndbrequire(undo.m_actions & Proxy_undo::ReadTupPage);
  {
    jam();
    const Tup_page* page = (const Tup_page*)gptr.p;
    const File_formats::Page_header& header = page->m_page_header;
    const Uint32 page_type = header.m_page_type;

    if (page_type == 0) { // wl4391_todo ?
      jam();
      ndbrequire(header.m_page_lsn_hi == 0 && header.m_page_lsn_lo == 0);
      undo.m_actions |= Proxy_undo::NoExecute;
      undo.m_actions |= Proxy_undo::SendUndoNext;
      D("proxy: callback" << V(page_type));
    } else {
      ndbrequire(page_type == File_formats::PT_Tup_fixsize_page ||
                 page_type == File_formats::PT_Tup_varsize_page);

      Uint64 page_lsn = (Uint64(header.m_page_lsn_hi) << 32) + header.m_page_lsn_lo;
      if (! (undo.m_lsn <= page_lsn))
      {
        jam();
        undo.m_actions |= Proxy_undo::NoExecute;
        undo.m_actions |= Proxy_undo::SendUndoNext;
      }

      undo.m_table_id = page->m_table_id;
      undo.m_fragment_id = page->m_fragment_id;
      D("proxy: callback" << V(undo.m_table_id) << V(undo.m_fragment_id));
      const Uint32 tableId = undo.m_table_id;
      if (tableId >= c_tableRecSize || c_tableRec[tableId] == 0) {
        D("proxy: table dropped" << V(tableId));
        undo.m_actions |= Proxy_undo::NoExecute;
        undo.m_actions |= Proxy_undo::SendUndoNext;
      }
    }
  }

  disk_restart_undo_finish(signal);
}

void
DbtupProxy::disk_restart_undo_finish(Signal* signal)
{
  Proxy_undo& undo = c_proxy_undo;

  if (undo.m_actions & Proxy_undo::SendUndoNext) {
    jam();
    signal->theData[0] = LgmanContinueB::EXECUTE_UNDO_RECORD;
    sendSignal(LGMAN_REF, GSN_CONTINUEB, signal, 1, JBB);
  }

  if (undo.m_actions & Proxy_undo::NoExecute) {
    jam();
    goto finish;
  }

  if (undo.m_actions & Proxy_undo::GetInstance) {
    jam();
    Uint32 instanceKey = getInstanceKey(undo.m_table_id, undo.m_fragment_id);
    Uint32 instanceNo = getInstanceFromKey(instanceKey);
    undo.m_instance_no = instanceNo;
  }

  if (!(undo.m_actions & Proxy_undo::SendToAll)) {
    jam();
    ndbrequire(undo.m_instance_no != 0);
    Uint32 i = undo.m_instance_no - 1;
    disk_restart_undo_send(signal, i);
  } else {
    jam();
    Uint32 i;
    for (i = 0; i < c_workers; i++) {
      disk_restart_undo_send(signal, i);
    }
  }

finish:
  ndbrequire(undo.m_in_use);
  undo.m_in_use = false;
}

void
DbtupProxy::disk_restart_undo_send(Signal* signal, Uint32 i)
{
  /*
   * Send undo entry via long signal because:
   * 1) a method call would execute in another non-mutexed Pgman
   * 2) MT-LGMAN is planned, do not optimize (pass pointer) now
   */
  Proxy_undo& undo = c_proxy_undo;

  LinearSectionPtr ptr[3];
  ptr[0].p = undo.m_data;
  ptr[0].sz = undo.m_len;

  signal->theData[0] = ZDISK_RESTART_UNDO;
  signal->theData[1] = undo.m_type;
  signal->theData[2] = undo.m_len;
  signal->theData[3] = (Uint32)(undo.m_lsn >> 32);
  signal->theData[4] = (Uint32)(undo.m_lsn & 0xFFFFFFFF);
  sendSignal(workerRef(i), GSN_CONTINUEB, signal, 5, JBB, ptr, 1);
}

// TSMAN

int
DbtupProxy::disk_restart_alloc_extent(Uint32 tableId, Uint32 fragId, 
                                      const Local_key* key, Uint32 pages)
{
  if (tableId >= c_tableRecSize || c_tableRec[tableId] == 0) {
    jam();
    D("proxy: table dropped" << V(tableId));
    return -1;
  }

  // local call so mapping instance key to number is ok
  Uint32 instanceKey = getInstanceKey(tableId, fragId);
  Uint32 instanceNo = getInstanceFromKey(instanceKey);

  Uint32 i = workerIndex(instanceNo);
  Dbtup* dbtup = (Dbtup*)workerBlock(i);
  return dbtup->disk_restart_alloc_extent(tableId, fragId, key, pages);
}

void
DbtupProxy::disk_restart_page_bits(Uint32 tableId, Uint32 fragId,
                                   const Local_key* key, Uint32 bits)
{
  ndbrequire(tableId < c_tableRecSize && c_tableRec[tableId] == 1);

  // local call so mapping instance key to number is ok
  Uint32 instanceKey = getInstanceKey(tableId, fragId);
  Uint32 instanceNo = getInstanceFromKey(instanceKey);

  Uint32 i = workerIndex(instanceNo);
  Dbtup* dbtup = (Dbtup*)workerBlock(i);
  dbtup->disk_restart_page_bits(tableId, fragId, key, bits);
}

BLOCK_FUNCTIONS(DbtupProxy)
