From 82c3e10da01260650ddd2944e3f895ccf2c07ffc Mon Sep 17 00:00:00 2001 From: Nsable-sh Date: Fri, 14 Aug 2026 12:59:03 -0300 Subject: db: recreate Berkeley DB environment after shutdown --- src/db.cpp | 93 +++++++++++++++++++++++++++++++++++++------------------- src/db.h | 4 +-- src/main_gui.cpp | 3 +- src/selftest.cpp | 66 +++++++++++++++++++++++++++++++++++++++- 4 files changed, 130 insertions(+), 36 deletions(-) (limited to 'src') diff --git a/src/db.cpp b/src/db.cpp index 0ff58e7..8b82fe5 100644 --- a/src/db.cpp +++ b/src/db.cpp @@ -52,9 +52,34 @@ static bool fDbEnvInit = false; // Why LoadWallet() refused, in words meant for the person who has to act on it. // Empty unless the reason is one we can name. string strWalletLoadError; -DbEnv dbenv(0u); +static DbEnv* pdbenv = NULL; +static FILE* pdbErrFile = NULL; static map mapFileUseCount; +DbEnv& GetDbEnv() +{ + if (!pdbenv) + pdbenv = new DbEnv(0u); + return *pdbenv; +} + +static void CloseDbEnv() +{ + if (pdbenv) + { + try { pdbenv->close(0); } + catch (...) { } + delete pdbenv; + pdbenv = NULL; + } + if (pdbErrFile) + { + fclose(pdbErrFile); + pdbErrFile = NULL; + } + fDbEnvInit = false; +} + class CDBInit { public: @@ -64,11 +89,7 @@ public: ~CDBInit() { if (fDbEnvInit) - { - try { dbenv.close(0); } - catch (...) { } - fDbEnvInit = false; - } + CloseDbEnv(); } } instance_of_cdbinit; @@ -104,24 +125,30 @@ CDB::CDB(const char* pszFile, const char* pszMode, bool fTxn) : pdb(NULL) printf("dbenv.open strAppDir=%s\n", strAppDir.c_str()); - dbenv.set_lg_dir(strLogDir.c_str()); - dbenv.set_lg_max(10000000); - dbenv.set_lk_max_locks(10000); - dbenv.set_lk_max_objects(10000); - dbenv.set_errfile(fopen("db.log", "a")); /// debug - ///dbenv.log_set_config(DB_LOG_AUTO_REMOVE, 1); /// causes corruption - ret = dbenv.open(strAppDir.c_str(), - DB_CREATE | - DB_INIT_LOCK | - DB_INIT_LOG | - DB_INIT_MPOOL | - DB_INIT_TXN | - DB_THREAD | - DB_PRIVATE | - DB_RECOVER, - 0); + DbEnv& env = GetDbEnv(); + env.set_lg_dir(strLogDir.c_str()); + env.set_lg_max(10000000); + env.set_lk_max_locks(10000); + env.set_lk_max_objects(10000); + pdbErrFile = fopen("db.log", "a"); /// debug + if (pdbErrFile) + env.set_errfile(pdbErrFile); + ///env.log_set_config(DB_LOG_AUTO_REMOVE, 1); /// causes corruption + ret = env.open(strAppDir.c_str(), + DB_CREATE | + DB_INIT_LOCK | + DB_INIT_LOG | + DB_INIT_MPOOL | + DB_INIT_TXN | + DB_THREAD | + DB_PRIVATE | + DB_RECOVER, + 0); if (ret > 0) + { + CloseDbEnv(); throw runtime_error(strprintf("CDB() : error %d opening database environment\n", ret)); + } fDbEnvInit = true; // A Berkeley DB file records, in every page header, a log sequence @@ -151,7 +178,7 @@ CDB::CDB(const char* pszFile, const char* pszMode, bool fTxn) : pdb(NULL) continue; try { - if (dbenv.lsn_reset(pszName, 0) == 0) + if (env.lsn_reset(pszName, 0) == 0) printf("CDB() : adopted %s from another environment " "(log sequence numbers reset)\n", pszName); } @@ -164,7 +191,7 @@ CDB::CDB(const char* pszFile, const char* pszMode, bool fTxn) : pdb(NULL) ++mapFileUseCount[strFile]; } - pdb = new Db(&dbenv, 0); + pdb = new Db(&GetDbEnv(), 0); ret = pdb->open(NULL, // Txn pointer pszFile, // Filename @@ -199,7 +226,8 @@ void CDB::Close() try { pdb->close(0); } catch (...) { } delete pdb; pdb = NULL; - try { dbenv.txn_checkpoint(0, 0, 0); } catch (...) { } + if (fDbEnvInit) + try { GetDbEnv().txn_checkpoint(0, 0, 0); } catch (...) { } CRITICAL_BLOCK(cs_db) --mapFileUseCount[strFile]; @@ -279,7 +307,8 @@ void DBFlush(bool fShutdown) // takes the process down before the wallet has been put down cleanly, // which is the difference between a portable wallet.dat and one welded // to this directory -- the lsn_reset just below is what frees it. - try { dbenv.txn_checkpoint(0, 0, 0); } + DbEnv& env = GetDbEnv(); + try { env.txn_checkpoint(0, 0, 0); } catch (const std::exception& e) { printf("DBFlush() : checkpoint failed: %s\n", e.what()); } @@ -290,7 +319,7 @@ void DBFlush(bool fShutdown) int nRefCount = (*mi).second; if (nRefCount == 0) { - try { dbenv.lsn_reset(strFile.c_str(), 0); } + try { env.lsn_reset(strFile.c_str(), 0); } catch (const std::exception& e) { printf("DBFlush() : lsn_reset(%s) failed: %s\n", strFile.c_str(), e.what()); } mapFileUseCount.erase(mi++); @@ -310,9 +339,8 @@ void DBFlush(bool fShutdown) // Found while making wallet encryption clean up after itself: // calling DBFlush(true) a second time crashed here every time. if (mapFileUseCount.empty()) - try { dbenv.log_archive(NULL, DB_ARCH_REMOVE); } catch (...) { } - try { dbenv.close(0); } catch (...) { } - fDbEnvInit = false; + try { env.log_archive(NULL, DB_ARCH_REMOVE); } catch (...) { } + CloseDbEnv(); } } } @@ -1042,7 +1070,8 @@ bool BackupWallet(const string& strDest) // Committing first, so the copy is not missing the newest records. // Both calls can throw, and a failed backup must not take the node // down with it. - try { dbenv.txn_checkpoint(0, 0, 0); } + DbEnv& env = GetDbEnv(); + try { env.txn_checkpoint(0, 0, 0); } catch (const std::exception& e) { return error("BackupWallet() : checkpoint failed: %s\n", e.what()); } @@ -1077,7 +1106,7 @@ bool BackupWallet(const string& strDest) } // Without this the copy is welded to this node's database/ dir. - int ret = dbenv.lsn_reset(strTemp.c_str(), 0); + int ret = env.lsn_reset(strTemp.c_str(), 0); if (ret != 0) printf("BackupWallet() : warning -- lsn_reset returned %d; the copy " "may only open beside this node's database/ directory\n", ret); diff --git a/src/db.h b/src/db.h index 2816957..53bda59 100644 --- a/src/db.h +++ b/src/db.h @@ -48,7 +48,7 @@ public: }; -extern DbEnv dbenv; +extern DbEnv& GetDbEnv(); extern void DBFlush(bool fShutdown); // Close the environment and delete its logs. Only the encryption command calls // this: the logs hold the plaintext records the old wallet wrote. @@ -237,7 +237,7 @@ public: if (!pdb) return false; DbTxn* ptxn = NULL; - int ret = dbenv.txn_begin(GetTxn(), &ptxn, 0); + int ret = GetDbEnv().txn_begin(GetTxn(), &ptxn, 0); if (!ptxn || ret != 0) return false; vTxn.push_back(ptxn); diff --git a/src/main_gui.cpp b/src/main_gui.cpp index feda428..705b4ef 100644 --- a/src/main_gui.cpp +++ b/src/main_gui.cpp @@ -114,7 +114,8 @@ static void PrintUsage() printf(" /gen\n"); printf(" /nogui or /daemon\n"); printf(" /selftest=wallet-keypool, wallet-hd, wallet-format, wallet-storage-sanity,\n"); - printf(" wallet-crypto, wallet-encrypt, wallet-portability, net-message,\n"); + printf(" db-env-reopen, wallet-crypto, wallet-encrypt, wallet-portability,\n"); + printf(" net-message,\n"); printf(" consensus-limits, pool-stratum,\n"); printf(" parse-money, socks5-proxy, or managed-tor\n"); printf("\n"); diff --git a/src/selftest.cpp b/src/selftest.cpp index 54249b1..31c168f 100644 --- a/src/selftest.cpp +++ b/src/selftest.cpp @@ -968,6 +968,68 @@ static int RunWalletStorageSanitySelfTest() return nFail == 0 ? 0 : 1; } +static int RunDbEnvReopenSelfTest() +{ + fflush(stdout); + printf("db-env-reopen self-test\n"); + + std::string tmp; + if (!MakeTempDir(tmp)) + { + printf(" FAIL could not create a temporary data directory\n"); + return 1; + } + + int nFail = 0; + std::string strOldDataDir = strSetDataDir; + strSetDataDir = tmp; + printf(" temp datadir: %s\n", tmp.c_str()); + + try + { + for (int i = 0; i < 5; i++) + { + int64 nValue = 1000 + i; + { + CWalletDB walletdb("cr+"); + nFail += Check(walletdb.WriteSetting("db-env-reopen-cycle", nValue), + "wallet setting can be written before shutdown") ? 0 : 1; + } + + DBFlush(true); + + int64 nRead = 0; + { + CWalletDB walletdb("r"); + nFail += Check(walletdb.ReadSetting("db-env-reopen-cycle", nRead), + "wallet setting can be read after env reopen") ? 0 : 1; + } + nFail += Check(nRead == nValue, + "reopened environment reads the last committed value") ? 0 : 1; + + DBFlush(true); + } + } + catch (const std::exception& e) + { + printf(" FAIL exception: %s\n", e.what()); + nFail++; + } + catch (...) + { + printf(" FAIL unknown exception\n"); + nFail++; + } + + DBFlush(true); + strSetDataDir = strOldDataDir; + RemoveTree(tmp); + printf("%s (%d failure%s)\n", nFail == 0 ? "ALL TESTS PASSED" : "TESTS FAILED", + nFail, nFail == 1 ? "" : "s"); + fflush(stdout); + return nFail == 0 ? 0 : 1; +} + static void ClearWalletRuntimeForTest() { CRITICAL_BLOCK(cs_mapKeys) @@ -2225,6 +2287,8 @@ int RunSelfTest(const std::string& name) return RunWalletFormatSelfTest(); if (name == "wallet-storage-sanity") return RunWalletStorageSanitySelfTest(); + if (name == "db-env-reopen") + return RunDbEnvReopenSelfTest(); if (name == "wallet-crypto") return RunWalletCryptoSelfTest(); if (name == "wallet-encrypt") @@ -2245,6 +2309,6 @@ int RunSelfTest(const std::string& name) return RunManagedTorSelfTest(); printf("Unknown self-test '%s'\n", name.c_str()); - printf("Known self-tests: wallet-keypool, wallet-hd, wallet-format, wallet-storage-sanity, wallet-crypto, wallet-encrypt, wallet-portability, net-message, consensus-limits, pool-stratum, parse-money, socks5-proxy, managed-tor\n"); + printf("Known self-tests: wallet-keypool, wallet-hd, wallet-format, wallet-storage-sanity, db-env-reopen, wallet-crypto, wallet-encrypt, wallet-portability, net-message, consensus-limits, pool-stratum, parse-money, socks5-proxy, managed-tor\n"); return 1; } -- cgit v1.2.3