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Overview
Comment:Add a checksum to the database header.
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SHA1: cba26fd7ccc5d66908713926f8eae03e0dc11a9b
User & Date: dan 2013-11-15 09:44:58
Context
2013-11-15
18:47
Various fixes so that the "bt" permutation test passes. check-in: 0866df185c user: dan tags: trunk
09:44
Add a checksum to the database header. check-in: cba26fd7cc user: dan tags: trunk
2013-11-14
19:29
Fix various savepoint-related problems in bt. check-in: c633d85c33 user: dan tags: trunk
Changes
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Changes to src/btInt.h. 

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** Database header fields.
*/
typedef struct BtDbhdr BtDbhdr;
struct BtDbhdr {
  u32 pgsz;                       /* Page size in bytes */
  u32 nPg;                        /* Number of pages in database */
  u32 cookie;                     /* User cookie value (SQL schema cookie) */


};

/*************************************************************************
** Interface to bt_pager.c functionality.
*/
typedef struct BtPage BtPage;
typedef struct BtPager BtPager;








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** Database header fields.
*/
typedef struct BtDbhdr BtDbhdr;
struct BtDbhdr {
  u32 pgsz;                       /* Page size in bytes */
  u32 nPg;                        /* Number of pages in database */
  u32 cookie;                     /* User cookie value (SQL schema cookie) */
  u32 padding;                    /* Unused */
  u32 aCksum[2];                  /* Checksum over other fields */
};

/*************************************************************************
** Interface to bt_pager.c functionality.
*/
typedef struct BtPage BtPage;
typedef struct BtPager BtPager;

Changes to src/bt_log.c. 

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  aLog[5] = iLast;
  return btLogHashRollback(pLog, btLogFrameHash(pLog, iLast), iLast);
}

static int btLogReadDbhdr(BtLog *pLog, BtDbhdr *pHdr){
  BtLock *p = pLog->pLock;
  int rc;
  i64 nByte;

  rc = p->pVfs->xSize(p->pFd, &nByte);
  if( rc==SQLITE4_OK && nByte>0 ){
    rc = p->pVfs->xRead(p->pFd, 0, pHdr, sizeof(BtDbhdr));
    if( BTLOG_LITTLE_ENDIAN ){
      pHdr->cookie = BYTESWAP32(pHdr->cookie);
      pHdr->nPg = BYTESWAP32(pHdr->nPg);
      pHdr->pgsz = BYTESWAP32(pHdr->pgsz);

    }
    assert( pHdr->pgsz>0 );
  }else{



    memset(pHdr, 0, sizeof(BtDbhdr));
    pHdr->pgsz = BT_DEFAULT_PGSZ;
    pHdr->nPg = 1;

  }













  return rc;
}


/*
** Run log recovery. In other words, read the log file from disk and 
** initialize the shared-memory accordingly.
*/
static int btLogRecover(BtLog *pLog){
  bt_env *pVfs = pLog->pLock->pVfs;
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    + (int)pLog->snapshot.aLog[3] - (int)pLog->snapshot.aLog[2]
    + (pLog->snapshot.aLog[3]!=0)
    + (int)pLog->snapshot.aLog[5] - (int)pLog->snapshot.aLog[4]
    + (pLog->snapshot.aLog[5]!=0)
  ;
}

static int btLogUpdateDbhdr(BtLog *pLog, u8 *aData){
  BtDbhdr dbhdr;

  dbhdr.cookie = pLog->snapshot.iCookie;
  dbhdr.nPg = pLog->snapshot.nPg;
  dbhdr.pgsz = pLog->snapshot.pgsz;

  if( BTLOG_LITTLE_ENDIAN ){
    dbhdr.cookie = BYTESWAP32(dbhdr.cookie);
    dbhdr.nPg = BYTESWAP32(dbhdr.nPg);
    dbhdr.pgsz = BYTESWAP32(dbhdr.pgsz);
    assert( dbhdr.pgsz>0 );
  }
  memcpy(aData, &dbhdr, sizeof(BtDbhdr));

  return SQLITE4_OK;
}

int sqlite4BtLogCheckpoint(BtLog *pLog, int nFrameBuffer){
  BtLock *pLock = pLog->pLock;
  int rc;

  /* Take the CHECKPOINTER lock. */
  rc = sqlite4BtLockCkpt(pLock);
  if( rc==SQLITE4_OK ){








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  aLog[5] = iLast;
  return btLogHashRollback(pLog, btLogFrameHash(pLog, iLast), iLast);
}

static int btLogReadDbhdr(BtLog *pLog, BtDbhdr *pHdr){
  BtLock *p = pLog->pLock;
  int rc;                         /* Return code */
  i64 nByte;                      /* Size of database file in byte */

  rc = p->pVfs->xSize(p->pFd, &nByte);
  if( rc==SQLITE4_OK && nByte>0 ){
    rc = p->pVfs->xRead(p->pFd, 0, pHdr, sizeof(BtDbhdr));
    if( rc==SQLITE4_OK ){
      u32 aCksum[2];
      btLogChecksum(1, pHdr, offsetof(BtDbhdr, aCksum), 0, aCksum);
      if( aCksum[0]==pHdr->aCksum[0] && aCksum[1]==pHdr->aCksum[1] ){
        return SQLITE4_OK;
      }


    }
  }

  memset(pHdr, 0, sizeof(BtDbhdr));
  pHdr->pgsz = BT_DEFAULT_PGSZ;
  pHdr->nPg = 1;
  return rc;
}

static int btLogUpdateDbhdr(BtLog *pLog, u8 *aData){
  BtDbhdr dbhdr;

  dbhdr.cookie = pLog->snapshot.iCookie;
  dbhdr.nPg = pLog->snapshot.nPg;
  dbhdr.pgsz = pLog->snapshot.pgsz;
  dbhdr.padding = 0;
  btLogChecksum(1, &dbhdr, offsetof(BtDbhdr, aCksum), 0, dbhdr.aCksum);

  assert( dbhdr.pgsz>0 );
  memcpy(aData, &dbhdr, sizeof(BtDbhdr));

  return SQLITE4_OK;
}


/*
** Run log recovery. In other words, read the log file from disk and 
** initialize the shared-memory accordingly.
*/
static int btLogRecover(BtLog *pLog){
  bt_env *pVfs = pLog->pLock->pVfs;
................................................................................
    + (int)pLog->snapshot.aLog[3] - (int)pLog->snapshot.aLog[2]
    + (pLog->snapshot.aLog[3]!=0)
    + (int)pLog->snapshot.aLog[5] - (int)pLog->snapshot.aLog[4]
    + (pLog->snapshot.aLog[5]!=0)
  ;
}



















int sqlite4BtLogCheckpoint(BtLog *pLog, int nFrameBuffer){
  BtLock *pLock = pLog->pLock;
  int rc;

  /* Take the CHECKPOINTER lock. */
  rc = sqlite4BtLockCkpt(pLock);
  if( rc==SQLITE4_OK ){

Changes to test/permutations.test. 

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#   bt
#   veryquick
#   quick
#   full
#
lappend ::testsuitelist xxx

  # attach.test attach3.test 
  # fkey2.test 
test_suite "bt" -prefix "" -description {
} -files {
  simple3.test

  alter.test alter3.test alter4.test
  analyze.test analyze3.test analyze4.test analyze5.test 
  analyze6.test analyze7.test analyze8.test
  auth.test auth2.test auth3.test auth4.test
  aggerror.test
  attach4.test
  autoindex1.test
  badutf.test badutf2.test
  between.test
  bigrow.test
  bind.test
  blob.test
  boundary1.test boundary2.test boundary3.test boundary4.test








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#   bt
#   veryquick
#   quick
#   full
#
lappend ::testsuitelist xxx


  # fkey2.test 
test_suite "bt" -prefix "" -description {
} -files {
  simple3.test

  alter.test alter3.test alter4.test
  analyze.test analyze3.test analyze4.test analyze5.test 
  analyze6.test analyze7.test analyze8.test
  auth.test auth2.test auth3.test auth4.test
  aggerror.test
  attach.test attach3.test attach4.test
  autoindex1.test
  badutf.test badutf2.test
  between.test
  bigrow.test
  bind.test
  blob.test
  boundary1.test boundary2.test boundary3.test boundary4.test

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