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Error if LSNs are not reset

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This commit is contained in:
Ava Chow 2024-04-15 16:47:14 -04:00
parent 4d7a3ae78e
commit d9878903fb
1 changed files with 18 additions and 0 deletions
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18
src/wallet/migrate.cpp
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@ -561,6 +561,24 @@ void BerkeleyRODatabase::Open()
throw std::runtime_error("BDB builtin encryption is not supported");
}
// Check all Log Sequence Numbers (LSN) point to file 0 and offset 1 which indicates that the LSNs were
// reset and that the log files are not necessary to get all of the data in the database.
for (uint32_t i = 0; i < outer_meta.last_page; ++i) {
// The LSN is composed of 2 32-bit ints, the first is a file id, the second an offset
// It will always be the first 8 bytes of a page, so we deserialize it directly for every page
uint32_t file;
uint32_t offset;
SeekToPage(db_file, i, page_size);
db_file >> file >> offset;
if (outer_meta.other_endian) {
file = internal_bswap_32(file);
offset = internal_bswap_32(offset);
}
if (file != 0 || offset != 1) {
throw std::runtime_error("LSNs are not reset, this database is not completely flushed. Please reopen then close the database with a version that has BDB support");
}
}
// Read the root page
SeekToPage(db_file, outer_meta.root, page_size);
PageHeader header(outer_meta.root, outer_meta.other_endian);