From patchwork Tue Oct 10 10:58:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goldwyn Rodrigues X-Patchwork-Id: 9995815 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 73F53603B5 for ; Tue, 10 Oct 2017 10:58:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 697F028505 for ; Tue, 10 Oct 2017 10:58:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5E35B28508; Tue, 10 Oct 2017 10:58:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DC3C128505 for ; Tue, 10 Oct 2017 10:58:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932152AbdJJK6O (ORCPT ); Tue, 10 Oct 2017 06:58:14 -0400 Received: from mx2.suse.de ([195.135.220.15]:39055 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932151AbdJJK6J (ORCPT ); Tue, 10 Oct 2017 06:58:09 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 16164AC0C; Tue, 10 Oct 2017 10:58:08 +0000 (UTC) From: Goldwyn Rodrigues To: linux-xfs@vger.kernel.org Cc: darrick.wong@oracle.com, david@fromorbit.com, bfoster@redhat.com, Goldwyn Rodrigues Subject: [PATCH v3 1/3] xfs_io: Add support for pwritev2() Date: Tue, 10 Oct 2017 05:58:00 -0500 Message-Id: <20171010105802.31353-1-rgoldwyn@suse.de> X-Mailer: git-send-email 2.14.2 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Goldwyn Rodrigues Signed-off-by: Goldwyn Rodrigues Reviewed-by: Brian Foster --- configure.ac | 1 + include/builddefs.in | 1 + io/Makefile | 4 ++++ io/pwrite.c | 43 ++++++++++++++++++++++++++++++------------- m4/package_libcdev.m4 | 16 ++++++++++++++++ 5 files changed, 52 insertions(+), 13 deletions(-) diff --git a/configure.ac b/configure.ac index 4161c3b4..2320e3e3 100644 --- a/configure.ac +++ b/configure.ac @@ -132,6 +132,7 @@ AC_HAVE_GETMNTENT AC_HAVE_GETMNTINFO AC_HAVE_FALLOCATE AC_HAVE_FIEMAP +AC_HAVE_PWRITEV2 AC_HAVE_PREADV AC_HAVE_COPY_FILE_RANGE AC_HAVE_SYNC_FILE_RANGE diff --git a/include/builddefs.in b/include/builddefs.in index ec630bd9..cd58ea8e 100644 --- a/include/builddefs.in +++ b/include/builddefs.in @@ -103,6 +103,7 @@ HAVE_GETMNTINFO = @have_getmntinfo@ HAVE_FALLOCATE = @have_fallocate@ HAVE_FIEMAP = @have_fiemap@ HAVE_PREADV = @have_preadv@ +HAVE_PWRITEV2 = @have_pwritev2@ HAVE_COPY_FILE_RANGE = @have_copy_file_range@ HAVE_SYNC_FILE_RANGE = @have_sync_file_range@ HAVE_SYNCFS = @have_syncfs@ diff --git a/io/Makefile b/io/Makefile index 47b0a669..050d6bd0 100644 --- a/io/Makefile +++ b/io/Makefile @@ -90,6 +90,10 @@ ifeq ($(HAVE_PREADV),yes) LCFLAGS += -DHAVE_PREADV -DHAVE_PWRITEV endif +ifeq ($(HAVE_PWRITEV2),yes) +LCFLAGS += -DHAVE_PWRITEV2 +endif + ifeq ($(HAVE_READDIR),yes) CFILES += readdir.c LCFLAGS += -DHAVE_READDIR diff --git a/io/pwrite.c b/io/pwrite.c index 1c5dfca1..5ceb26c7 100644 --- a/io/pwrite.c +++ b/io/pwrite.c @@ -62,7 +62,8 @@ do_pwritev( int fd, off64_t offset, ssize_t count, - ssize_t buffer_size) + ssize_t buffer_size, + int pwritev2_flags) { int vecs = 0; ssize_t oldlen = 0; @@ -81,7 +82,14 @@ do_pwritev( } else { vecs = vectors; } +#ifdef HAVE_PWRITEV2 + if (pwritev2_flags) + bytes = pwritev2(fd, iov, vectors, offset, pwritev2_flags); + else + bytes = pwritev(fd, iov, vectors, offset); +#else bytes = pwritev(fd, iov, vectors, offset); +#endif /* restore trimmed iov */ if (oldlen) @@ -98,12 +106,13 @@ do_pwrite( int fd, off64_t offset, ssize_t count, - ssize_t buffer_size) + ssize_t buffer_size, + int pwritev2_flags) { if (!vectors) return pwrite(fd, buffer, min(count, buffer_size), offset); - return do_pwritev(fd, offset, count, buffer_size); + return do_pwritev(fd, offset, count, buffer_size, pwritev2_flags); } static int @@ -111,7 +120,8 @@ write_random( off64_t offset, long long count, unsigned int seed, - long long *total) + long long *total, + int pwritev2_flags) { off64_t off, range; ssize_t bytes; @@ -133,7 +143,8 @@ write_random( buffersize; else off = offset; - bytes = do_pwrite(file->fd, off, buffersize, buffersize); + bytes = do_pwrite(file->fd, off, buffersize, buffersize, + pwritev2_flags); if (bytes == 0) break; if (bytes < 0) { @@ -153,7 +164,8 @@ static int write_backward( off64_t offset, long long *count, - long long *total) + long long *total, + int pwritev2_flags) { off64_t end, off = offset; ssize_t bytes = 0, bytes_requested; @@ -171,7 +183,8 @@ write_backward( if ((bytes_requested = (off % buffersize))) { bytes_requested = min(cnt, bytes_requested); off -= bytes_requested; - bytes = do_pwrite(file->fd, off, bytes_requested, buffersize); + bytes = do_pwrite(file->fd, off, bytes_requested, buffersize, + pwritev2_flags); if (bytes == 0) return ops; if (bytes < 0) { @@ -189,7 +202,8 @@ write_backward( while (cnt > end) { bytes_requested = min(cnt, buffersize); off -= bytes_requested; - bytes = do_pwrite(file->fd, off, cnt, buffersize); + bytes = do_pwrite(file->fd, off, cnt, buffersize, + pwritev2_flags); if (bytes == 0) break; if (bytes < 0) { @@ -212,7 +226,8 @@ write_buffer( size_t bs, int fd, off64_t skip, - long long *total) + long long *total, + int pwritev2_flags) { ssize_t bytes; long long bar = min(bs, count); @@ -224,7 +239,7 @@ write_buffer( if (read_buffer(fd, skip + *total, bs, &bar, 0, 1) < 0) break; } - bytes = do_pwrite(file->fd, offset, count, bar); + bytes = do_pwrite(file->fd, offset, count, bar, pwritev2_flags); if (bytes == 0) break; if (bytes < 0) { @@ -258,6 +273,7 @@ pwrite_f( int Cflag, qflag, uflag, dflag, wflag, Wflag; int direction = IO_FORWARD; int c, fd = -1; + int pwritev2_flags = 0; Cflag = qflag = uflag = dflag = wflag = Wflag = 0; init_cvtnum(&fsblocksize, &fssectsize); @@ -365,13 +381,14 @@ pwrite_f( case IO_RANDOM: if (!zeed) /* srandom seed */ zeed = time(NULL); - c = write_random(offset, count, zeed, &total); + c = write_random(offset, count, zeed, &total, pwritev2_flags); break; case IO_FORWARD: - c = write_buffer(offset, count, bsize, fd, skip, &total); + c = write_buffer(offset, count, bsize, fd, skip, &total, + pwritev2_flags); break; case IO_BACKWARD: - c = write_backward(offset, &count, &total); + c = write_backward(offset, &count, &total, pwritev2_flags); break; default: total = 0; diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4 index fa5b6397..48da0783 100644 --- a/m4/package_libcdev.m4 +++ b/m4/package_libcdev.m4 @@ -146,6 +146,22 @@ AC_DEFUN([AC_HAVE_PREADV], AC_SUBST(have_preadv) ]) +# +# Check if we have a pwritev2 libc call (Linux) +# +AC_DEFUN([AC_HAVE_PWRITEV2], + [ AC_MSG_CHECKING([for pwritev2]) + AC_TRY_LINK([ +#define _BSD_SOURCE +#include + ], [ + pwritev2(0, 0, 0, 0, 0); + ], have_pwritev2=yes + AC_MSG_RESULT(yes), + AC_MSG_RESULT(no)) + AC_SUBST(have_pwritev2) + ]) + # # Check if we have a copy_file_range system call (Linux) #