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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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8
src/wal.h
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@@ -28,13 +28,15 @@
# define sqlite3WalDbsize(y,z)
# define sqlite3WalWriteLock(y,z) 0
# define sqlite3WalUndo(x,y,z) 0
# define sqlite3WalSavepoint(z) 0
# define sqlite3WalSavepoint(y,z)
# define sqlite3WalSavepointUndo(y,z) 0
# define sqlite3WalFrames(u,v,w,x,y,z) 0
# define sqlite3WalCheckpoint(u,v,w,x,y,z) 0
# define sqlite3WalCallback(z) 0
#else
#define WAL_SAVEPOINT_NDATA 3
/* Connection to a write-ahead log (WAL) file.
** There is one object of this type for each pager.
*/
@@ -69,11 +71,11 @@ int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx);
/* Return an integer that records the current (uncommitted) write
** position in the WAL */
u32 sqlite3WalSavepoint(Wal *pWal);
void sqlite3WalSavepoint(Wal *pWal, u32 *aWalData);
/* Move the write position of the WAL back to iFrame. Called in
** response to a ROLLBACK TO command. */
int sqlite3WalSavepointUndo(Wal *pWal, u32 iFrame);
int sqlite3WalSavepointUndo(Wal *pWal, u32 *aWalData);
/* Write a frame or frames to the log. */
int sqlite3WalFrames(Wal *pWal, int, PgHdr *, Pgno, int, int);