From b096e16699a189d619dad8a7319c6eb4dc5d46c5 Mon Sep 17 00:00:00 2001 From: Howard Chu Date: Wed, 7 Jul 2021 16:26:35 +0100 Subject: Revert "db_lmdb: test for mmap support at init time" This reverts commit bd96536637724413173271e8d5df1777f7879c29. The check interferes with raw device/partition support. --- src/blockchain_db/lmdb/db_lmdb.cpp | 30 ------------------------------ src/blockchain_db/lmdb/db_lmdb.h | 1 - 2 files changed, 31 deletions(-) diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp index e2ac9df0b..01f91209d 100644 --- a/src/blockchain_db/lmdb/db_lmdb.cpp +++ b/src/blockchain_db/lmdb/db_lmdb.cpp @@ -25,13 +25,6 @@ // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -#ifndef _WIN32 -#include -#include -#include -#include -#endif - #include "db_lmdb.h" #include @@ -1303,26 +1296,6 @@ BlockchainLMDB::BlockchainLMDB(bool batch_transactions): BlockchainDB() m_hardfork = nullptr; } -void BlockchainLMDB::check_mmap_support() -{ -#ifndef _WIN32 - const boost::filesystem::path mmap_test_file = m_folder / boost::filesystem::unique_path(); - int mmap_test_fd = ::open(mmap_test_file.string().c_str(), O_RDWR | O_CREAT, 0600); - if (mmap_test_fd < 0) - throw0(DB_ERROR((std::string("Failed to check for mmap support: open failed: ") + strerror(errno)).c_str())); - epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([mmap_test_fd, &mmap_test_file]() { - ::close(mmap_test_fd); - boost::filesystem::remove(mmap_test_file.string()); - }); - if (write(mmap_test_fd, "mmaptest", 8) != 8) - throw0(DB_ERROR((std::string("Failed to check for mmap support: write failed: ") + strerror(errno)).c_str())); - void *mmap_res = mmap(NULL, 8, PROT_READ, MAP_SHARED, mmap_test_fd, 0); - if (mmap_res == MAP_FAILED) - throw0(DB_ERROR("This filesystem does not support mmap: use --data-dir to place the blockchain on a filesystem which does")); - munmap(mmap_res, 8); -#endif -} - void BlockchainLMDB::open(const std::string& filename, const int db_flags) { int result; @@ -1364,9 +1337,6 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags) m_folder = filename; - try { check_mmap_support(); } - catch(...) { MERROR("Failed to check for mmap support, proceeding"); } - #ifdef __OpenBSD__ if ((mdb_flags & MDB_WRITEMAP) == 0) { MCLOG_RED(el::Level::Info, "global", "Running on OpenBSD: forcing WRITEMAP"); diff --git a/src/blockchain_db/lmdb/db_lmdb.h b/src/blockchain_db/lmdb/db_lmdb.h index 20edab2e9..bdae44948 100644 --- a/src/blockchain_db/lmdb/db_lmdb.h +++ b/src/blockchain_db/lmdb/db_lmdb.h @@ -359,7 +359,6 @@ public: static int compare_string(const MDB_val *a, const MDB_val *b); private: - void check_mmap_support(); void do_resize(uint64_t size_increase=0); bool need_resize(uint64_t threshold_size=0) const; -- cgit v1.2.3