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-rw-r--r--src/wallet/db.cpp31
1 files changed, 19 insertions, 12 deletions
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index 2d57c92ccc..b36a6de2a3 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -20,6 +20,7 @@
#include <boost/thread.hpp>
namespace {
+
//! Make sure database has a unique fileid within the environment. If it
//! doesn't, throw an error. BDB caches do not work properly when more than one
//! open database has the same fileid (values written to one database may show
@@ -29,25 +30,19 @@ namespace {
//! (https://docs.oracle.com/cd/E17275_01/html/programmer_reference/program_copy.html),
//! so bitcoin should never create different databases with the same fileid, but
//! this error can be triggered if users manually copy database files.
-void CheckUniqueFileid(const BerkeleyEnvironment& env, const std::string& filename, Db& db)
+void CheckUniqueFileid(const BerkeleyEnvironment& env, const std::string& filename, Db& db, WalletDatabaseFileId& fileid)
{
if (env.IsMock()) return;
- u_int8_t fileid[DB_FILE_ID_LEN];
- int ret = db.get_mpf()->get_fileid(fileid);
+ int ret = db.get_mpf()->get_fileid(fileid.value);
if (ret != 0) {
throw std::runtime_error(strprintf("BerkeleyBatch: Can't open database %s (get_fileid failed with %d)", filename, ret));
}
- for (const auto& item : env.mapDb) {
- u_int8_t item_fileid[DB_FILE_ID_LEN];
- if (item.second && item.second->get_mpf()->get_fileid(item_fileid) == 0 &&
- memcmp(fileid, item_fileid, sizeof(fileid)) == 0) {
- const char* item_filename = nullptr;
- item.second->get_dbname(&item_filename, nullptr);
+ for (const auto& item : env.m_fileids) {
+ if (fileid == item.second && &fileid != &item.second) {
throw std::runtime_error(strprintf("BerkeleyBatch: Can't open database %s (duplicates fileid %s from %s)", filename,
- HexStr(std::begin(item_fileid), std::end(item_fileid)),
- item_filename ? item_filename : "(unknown database)"));
+ HexStr(std::begin(item.second.value), std::end(item.second.value)), item.first));
}
}
}
@@ -56,6 +51,11 @@ CCriticalSection cs_db;
std::map<std::string, BerkeleyEnvironment> g_dbenvs GUARDED_BY(cs_db); //!< Map from directory name to open db environment.
} // namespace
+bool WalletDatabaseFileId::operator==(const WalletDatabaseFileId& rhs) const
+{
+ return memcmp(value, &rhs.value, sizeof(value)) == 0;
+}
+
BerkeleyEnvironment* GetWalletEnv(const fs::path& wallet_path, std::string& database_filename)
{
fs::path env_directory;
@@ -504,7 +504,7 @@ BerkeleyBatch::BerkeleyBatch(BerkeleyDatabase& database, const char* pszMode, bo
// versions of BDB have an set_lk_exclusive method for this
// purpose, but the older version we use does not.)
for (auto& env : g_dbenvs) {
- CheckUniqueFileid(env.second, strFilename, *pdb_temp);
+ CheckUniqueFileid(env.second, strFilename, *pdb_temp, this->env->m_fileids[strFilename]);
}
pdb = pdb_temp.release();
@@ -826,6 +826,13 @@ void BerkeleyDatabase::Flush(bool shutdown)
LOCK(cs_db);
g_dbenvs.erase(env->Directory().string());
env = nullptr;
+ } else {
+ // TODO: To avoid g_dbenvs.erase erasing the environment prematurely after the
+ // first database shutdown when multiple databases are open in the same
+ // environment, should replace raw database `env` pointers with shared or weak
+ // pointers, or else separate the database and environment shutdowns so
+ // environments can be shut down after databases.
+ env->m_fileids.erase(strFile);
}
}
}