From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA1A3CCA47B for ; Wed, 8 Jun 2022 17:27:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231365AbiFHR1d (ORCPT ); Wed, 8 Jun 2022 13:27:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232587AbiFHR1E (ORCPT ); Wed, 8 Jun 2022 13:27:04 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2CC616171 for ; Wed, 8 Jun 2022 10:25:02 -0700 (PDT) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 258FPQ3A015751 for ; Wed, 8 Jun 2022 10:25:01 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=DNGsFX4erree0zR56AuJOnkgOGUUCMvcgtBDT/ftTig=; b=YNsZYTF0TycUtdwyi5fO9SEGnbCCxYZ2zKxypdRymix1ceopCYZt542hCjkDD1niK++F p9jY3ISaYfoVHDsLrkOtS9WmPlH/NZ0qL8OGIQ6/v+Jr4ihk8vS0riFnAD9KqSenTMmG mbAAYPevNvPDY/+dTULItdl5EEkaIZ5fiRY= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3gjr0jb1r8-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 08 Jun 2022 10:25:01 -0700 Received: from twshared14818.18.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Wed, 8 Jun 2022 10:24:55 -0700 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id A1219103BFB61; Wed, 8 Jun 2022 10:17:43 -0700 (PDT) From: Stefan Roesch To: , , , , CC: , , , , Subject: [PATCH v8 11/14] io_uring: Add support for async buffered writes Date: Wed, 8 Jun 2022 10:17:38 -0700 Message-ID: <20220608171741.3875418-12-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220608171741.3875418-1-shr@fb.com> References: <20220608171741.3875418-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: Q9cuuMkwRh3pdKNIlw1vPAN4TNRYn7cc X-Proofpoint-GUID: Q9cuuMkwRh3pdKNIlw1vPAN4TNRYn7cc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-08_05,2022-06-07_02,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This enables the async buffered writes for the filesystems that support async buffered writes in io-uring. Buffered writes are enabled for blocks that are already in the page cache or can be acquired with noio. Signed-off-by: Stefan Roesch --- fs/io_uring.c | 29 ++++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 86f9df56526b..cb5bf672b85e 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4311,7 +4311,7 @@ static inline int io_iter_do_read(struct io_kiocb *= req, struct iov_iter *iter) return -EINVAL; } =20 -static bool need_read_all(struct io_kiocb *req) +static bool need_complete_io(struct io_kiocb *req) { return req->flags & REQ_F_ISREG || S_ISBLK(file_inode(req->file)->i_mode); @@ -4440,7 +4440,7 @@ static int io_read(struct io_kiocb *req, unsigned i= nt issue_flags) } else if (ret =3D=3D -EIOCBQUEUED) { goto out_free; } else if (ret =3D=3D req->cqe.res || ret <=3D 0 || !force_nonblock || - (req->flags & REQ_F_NOWAIT) || !need_read_all(req)) { + (req->flags & REQ_F_NOWAIT) || !need_complete_io(req)) { /* read all, failed, already did sync or don't want to retry */ goto done; } @@ -4536,9 +4536,10 @@ static int io_write(struct io_kiocb *req, unsigned= int issue_flags) if (unlikely(!io_file_supports_nowait(req))) goto copy_iov; =20 - /* file path doesn't support NOWAIT for non-direct_IO */ - if (force_nonblock && !(kiocb->ki_flags & IOCB_DIRECT) && - (req->flags & REQ_F_ISREG)) + /* File path supports NOWAIT for non-direct_IO only for block devices.= */ + if (!(kiocb->ki_flags & IOCB_DIRECT) && + !(kiocb->ki_filp->f_mode & FMODE_BUF_WASYNC) && + (req->flags & REQ_F_ISREG)) goto copy_iov; =20 kiocb->ki_flags |=3D IOCB_NOWAIT; @@ -4592,6 +4593,24 @@ static int io_write(struct io_kiocb *req, unsigned= int issue_flags) /* IOPOLL retry should happen for io-wq threads */ if (ret2 =3D=3D -EAGAIN && (req->ctx->flags & IORING_SETUP_IOPOLL)) goto copy_iov; + + if (ret2 !=3D req->cqe.res && ret2 >=3D 0 && need_complete_io(req)) { + struct io_async_rw *rw; + + /* This is a partial write. The file pos has already been + * updated, setup the async struct to complete the request + * in the worker. Also update bytes_done to account for + * the bytes already written. + */ + iov_iter_save_state(&s->iter, &s->iter_state); + ret =3D io_setup_async_rw(req, iovec, s, true); + + rw =3D req->async_data; + if (rw) + rw->bytes_done +=3D ret2; + + return ret ? ret : -EAGAIN; + } done: kiocb_done(req, ret2, issue_flags); } else { --=20 2.30.2