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Change the checksum used in WAL files so that each frames checksum depends on the content of the WAL header and all frame headers and content up to and including the frame to which the checksum is attached.

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FossilOrigin-Name: 8a53f12c83a107684b99f4a9de371b5ea3ca810a
This commit is contained in:
dan
2010-05-24 13:57:42 +00:00
parent c81791573a
commit 71d8991932
8 changed files with 146 additions and 81 deletions
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6
src/pager.c
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@@ -221,7 +221,7 @@ struct PagerSavepoint {
Bitvec *pInSavepoint; /* Set of pages in this savepoint */
Pgno nOrig; /* Original number of pages in file */
Pgno iSubRec; /* Index of first record in sub-journal */
u32 iFrame; /* Last frame in WAL when savepoint opened */
u32 aWalData[WAL_SAVEPOINT_NDATA]; /* WAL savepoint context */
};
/*
@@ -2567,7 +2567,7 @@ static int pagerPlaybackSavepoint(Pager *pPager, PagerSavepoint *pSavepoint){
i64 offset = pSavepoint->iSubRec*(4+pPager->pageSize);
if( pagerUseWal(pPager) ){
rc = sqlite3WalSavepointUndo(pPager->pWal, pSavepoint->iFrame);
rc = sqlite3WalSavepointUndo(pPager->pWal, pSavepoint->aWalData);
}
for(ii=pSavepoint->iSubRec; rc==SQLITE_OK && ii<pPager->nSubRec; ii++){
assert( offset==ii*(4+pPager->pageSize) );
@@ -5448,7 +5448,7 @@ int sqlite3PagerOpenSavepoint(Pager *pPager, int nSavepoint){
return SQLITE_NOMEM;
}
if( pagerUseWal(pPager) ){
aNew[ii].iFrame = sqlite3WalSavepoint(pPager->pWal);
sqlite3WalSavepoint(pPager->pWal, aNew[ii].aWalData);
}
}