From patchwork Mon Sep 20 22:15:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Neeraj Singh (WINDOWS-SFS)" X-Patchwork-Id: 12506787 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9FB3BC433FE for ; Tue, 21 Sep 2021 02:21:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 794E06124A for ; Tue, 21 Sep 2021 02:21:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347849AbhIUCWZ (ORCPT ); Mon, 20 Sep 2021 22:22:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234362AbhIUBuU (ORCPT ); Mon, 20 Sep 2021 21:50:20 -0400 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66FF3C07E5C1 for ; Mon, 20 Sep 2021 15:15:16 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id w29so33732184wra.8 for ; Mon, 20 Sep 2021 15:15:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=4TwjEERCBTdTIk5k03nSoPU6aP7qbN6anXF+SduK7kA=; b=EH1uYVXdPuCHVtvmEDbd9j249I2/KSQnGQA/2Re4CQT6LtsC+49W0f8jh3fGl1DC18 M6QPCPss21LGoac7vJwu8dV1HqoyoBCvQCFi4aBZa+fsTBlsWdK9VACFLA4CY6mTZDIA gpViQmTWxAaLiMco2txIh61uFzuTf1MHiDJYElEkw9e2fKy8x69nDHJtITd6Ge52kpLB 0slmkFKFZo8oMGTPNr9qt4TSyXw6KSlXPw0wM9H59jQqhIVx2CGjhpRYA3/dzVSMTBAj A/g2GHfETA+iiOHODaelaw9GFRmFc6l0/Ls5tpRGmKhXsR3nwiDIch6omHXp8BFTA2V5 2JlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=4TwjEERCBTdTIk5k03nSoPU6aP7qbN6anXF+SduK7kA=; b=YQ4P3fRg6HD9FBLHZPhnx/6XPW9eB0npBVebCki4omZBfwCKNNf1A/7gpQ2TfvCvXZ onsDOXyeI6EreGihhrowpKdXDLtahowa/fkKG+ueCWAXpVWnBRNeiDOa9evbOu9q6wYv ZrcLPKoEkJo6ab4hG6kGz1gUMVhR4lHZGhMZCXAbzBrxs8Q2PQHrqL67SRkPHcCrAswe 6KW4Hr2qyTp+Kmzbvc+NhClGt3BLiSZwdiRt3C6L+aicU8taQdR85a9lR/LSGMYYw8Zy vqDJNrSBCkasRxutTOS8+gnvsTKlx6SD4VcjWg3Ipvm0OucfRtw7RibwJn3ashWv5Ukh jf3Q== X-Gm-Message-State: AOAM531bZHSdeJps9fyKREVqB6Zd0z5q6MgBia/QLzGn21L59u6i5jzV HKoQCxygAK7bXT7tYGwTz7vHRQldPsA= X-Google-Smtp-Source: ABdhPJwgH6u8ml+idY8s1iPety3Y32BXB80hHsEQiI+C6anPFEvEKuzWz6ItfE7H3tabmc8lwA/bMA== X-Received: by 2002:adf:e0cc:: with SMTP id m12mr30801604wri.62.1632176115037; Mon, 20 Sep 2021 15:15:15 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id t23sm18071595wrb.71.2021.09.20.15.15.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Sep 2021 15:15:14 -0700 (PDT) Message-Id: In-Reply-To: References: Date: Mon, 20 Sep 2021 22:15:08 +0000 Subject: [PATCH v4 3/6] core.fsyncobjectfiles: add windows support for batch mode Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: Neeraj-Personal , Johannes Schindelin , Jeff King , Jeff Hostetler , Christoph Hellwig , =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsA==?= Bjarmason , "Randall S. Becker" , Bagas Sanjaya , "Neeraj K. Singh" , Neeraj Singh Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Neeraj Singh From: Neeraj Singh This commit adds a win32 implementation for fsync_no_flush that is called git_fsync. The 'NtFlushBuffersFileEx' function being called is available since Windows 8. If the function is not available, we return -1 and Git falls back to doing a full fsync. The operating system is told to flush data only without a hardware flush primitive. A later full fsync will cause the metadata log to be flushed and then the disk cache to be flushed on NTFS and ReFS. Other filesystems will treat this as a full flush operation. I added a new file here for this system call so as not to conflict with downstream changes in the git-for-windows repository related to fscache. Signed-off-by: Neeraj Singh --- compat/mingw.h | 3 +++ compat/win32/flush.c | 29 +++++++++++++++++++++++++++++ config.mak.uname | 2 ++ contrib/buildsystems/CMakeLists.txt | 3 ++- wrapper.c | 4 ++++ 5 files changed, 40 insertions(+), 1 deletion(-) create mode 100644 compat/win32/flush.c diff --git a/compat/mingw.h b/compat/mingw.h index c9a52ad64a6..6074a3d3ced 100644 --- a/compat/mingw.h +++ b/compat/mingw.h @@ -329,6 +329,9 @@ int mingw_getpagesize(void); #define getpagesize mingw_getpagesize #endif +int win32_fsync_no_flush(int fd); +#define fsync_no_flush win32_fsync_no_flush + struct rlimit { unsigned int rlim_cur; }; diff --git a/compat/win32/flush.c b/compat/win32/flush.c new file mode 100644 index 00000000000..c013920ce37 --- /dev/null +++ b/compat/win32/flush.c @@ -0,0 +1,29 @@ +#include "../../git-compat-util.h" +#include +#include "lazyload.h" + +int win32_fsync_no_flush(int fd) +{ + IO_STATUS_BLOCK io_status; + +#define FLUSH_FLAGS_FILE_DATA_ONLY 1 + + DECLARE_PROC_ADDR(ntdll.dll, NTSTATUS, NtFlushBuffersFileEx, + HANDLE FileHandle, ULONG Flags, PVOID Parameters, ULONG ParameterSize, + PIO_STATUS_BLOCK IoStatusBlock); + + if (!INIT_PROC_ADDR(NtFlushBuffersFileEx)) { + errno = ENOSYS; + return -1; + } + + /* See https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/nf-ntifs-ntflushbuffersfileex */ + memset(&io_status, 0, sizeof(io_status)); + if (NtFlushBuffersFileEx((HANDLE)_get_osfhandle(fd), FLUSH_FLAGS_FILE_DATA_ONLY, + NULL, 0, &io_status)) { + errno = EINVAL; + return -1; + } + + return 0; +} diff --git a/config.mak.uname b/config.mak.uname index e6d482fbcc6..34c93314a50 100644 --- a/config.mak.uname +++ b/config.mak.uname @@ -451,6 +451,7 @@ endif CFLAGS = BASIC_CFLAGS = -nologo -I. -Icompat/vcbuild/include -DWIN32 -D_CONSOLE -DHAVE_STRING_H -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE COMPAT_OBJS = compat/msvc.o compat/winansi.o \ + compat/win32/flush.o \ compat/win32/path-utils.o \ compat/win32/pthread.o compat/win32/syslog.o \ compat/win32/trace2_win32_process_info.o \ @@ -626,6 +627,7 @@ ifneq (,$(findstring MINGW,$(uname_S))) COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\" COMPAT_OBJS += compat/mingw.o compat/winansi.o \ compat/win32/trace2_win32_process_info.o \ + compat/win32/flush.o \ compat/win32/path-utils.o \ compat/win32/pthread.o compat/win32/syslog.o \ compat/win32/dirent.o diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt index 171b4124afe..b573a5ee122 100644 --- a/contrib/buildsystems/CMakeLists.txt +++ b/contrib/buildsystems/CMakeLists.txt @@ -261,7 +261,8 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows") NOGDI OBJECT_CREATION_MODE=1 __USE_MINGW_ANSI_STDIO=0 USE_NED_ALLOCATOR OVERRIDE_STRDUP MMAP_PREVENTS_DELETE USE_WIN32_MMAP UNICODE _UNICODE HAVE_WPGMPTR ENSURE_MSYSTEM_IS_SET) - list(APPEND compat_SOURCES compat/mingw.c compat/winansi.c compat/win32/path-utils.c + list(APPEND compat_SOURCES compat/mingw.c compat/winansi.c + compat/win32/flush.c compat/win32/path-utils.c compat/win32/pthread.c compat/win32mmap.c compat/win32/syslog.c compat/win32/trace2_win32_process_info.c compat/win32/dirent.c compat/nedmalloc/nedmalloc.c compat/strdup.c) diff --git a/wrapper.c b/wrapper.c index bb4f9f043ce..1a1e2fba9c9 100644 --- a/wrapper.c +++ b/wrapper.c @@ -567,6 +567,10 @@ int git_fsync(int fd, enum fsync_action action) SYNC_FILE_RANGE_WAIT_AFTER); #endif +#ifdef fsync_no_flush + return fsync_no_flush(fd); +#endif + errno = ENOSYS; return -1;