From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS53758 23.128.96.0/24 X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by dcvr.yhbt.net (Postfix) with ESMTP id F403D1F8C6 for ; Fri, 27 Aug 2021 23:50:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232689AbhH0Xuk (ORCPT ); Fri, 27 Aug 2021 19:50:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232616AbhH0Xub (ORCPT ); Fri, 27 Aug 2021 19:50:31 -0400 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 017ABC061796 for ; Fri, 27 Aug 2021 16:49:42 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id n5so12683169wro.12 for ; Fri, 27 Aug 2021 16:49:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=WhvHe8govudP9XtIENQ0EqhwppcAIrn83E39aQbHy/I=; b=ib6u++jnH6uxHJEPr7vemGvNNBkstVYjNG4LJSoFBAsRKlEUcQ2xK8BY3IVzuus3le 4kheCqdmh6ZiFeG7jzRs0mHffOxzIH5huSE1tXRbmazpoqYBqORTdBFkKXazkVVHm39e uU+SLjVUtl4IhVhGP+5c6PWqL8TV4JB9ySmGYGPgBPgNrNjnG4O9DePksTWXYESHrj95 J5KmhA9BmWVzSuWN5cIMo+9JYRNI9+vi0ZhDsuoElp/n3IzpGPTE03anfDSlE+LErxNJ LOLZD06xale4JQxM7pZuMGk169/+xjR2ABS2/EIR/n5URzKYPcVotB8b7QsgkPERzsob 3aTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=WhvHe8govudP9XtIENQ0EqhwppcAIrn83E39aQbHy/I=; b=Q/VgkvmuRcfju7drEk5n6O9vV3VYjylsCIdI1+lGZCKBa/VWgDwCITLRw5QV6Oatys 7CTxTxTCjZgZ4+q9iuSPz/9GFf3Dx9xQ15xnTJNG3VJAn7Sp88zRwCWyrW/1HoYhOEfr Hg4avqd/5cS2CBHppmQYcAXkFRFEiH6KjxOj6N2xkjmcKHku3GRPKb2Ps6XuytMDvZqM PZade0gPqmDAoiw6NjF2i/NdPq8+R5SMNT684IqZm/Oh9ZFtZaXxKJAorH10T3YIrtob aoVRkgIXAGO11xaTqnQoEo43tUCjuvgiS2h7dADRZkshkiUZvjH2B3mSe5S7jM5QF1QZ +piw== X-Gm-Message-State: AOAM532pjd+EA1ziCy7O1YHuAW6737aaCrNQcGsxxTsOwN3uRQlxMnPr l5IkK/2XcuQ1eoO3FYA7A+lQGTej2aU= X-Google-Smtp-Source: ABdhPJy8z8cm1KR2QKnCSfXBu2QekNHH+Cg9P/sy8E/kn+JAAXmiMo7h80U81/D5jr09yjilFd6kVA== X-Received: by 2002:a5d:63ca:: with SMTP id c10mr13370936wrw.16.1630108180685; Fri, 27 Aug 2021 16:49:40 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id q13sm7598981wrv.79.2021.08.27.16.49.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Aug 2021 16:49:40 -0700 (PDT) Message-Id: <546ad9c82e8e0c2eb4683f9f360d8f30e2136020.1630108177.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Neeraj Singh via GitGitGadget" Date: Fri, 27 Aug 2021 23:49:35 +0000 Subject: [PATCH v2 4/6] core.fsyncobjectfiles: add windows support for batch mode Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: Neeraj-Personal , Johannes Schindelin , Jeff King , Jeff Hostetler , Christoph Hellwig , =?UTF-8?Q?=C3=86var_Arnfj=C3=B6r=C3=B0?= Bjarmason , "Neeraj K. Singh" , Neeraj Singh Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org 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 87944dfec72..b5c950f1e30 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 8c07f2265a8..ef1fd109b74 100644 --- a/config.mak.uname +++ b/config.mak.uname @@ -450,6 +450,7 @@ 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 \ @@ -624,6 +625,7 @@ 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 37a8b61a7df..d951306b33e 100644 --- a/wrapper.c +++ b/wrapper.c @@ -563,6 +563,10 @@ 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; } -- gitgitgadget