From patchwork Thu May 26 17:38:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 12862606 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 EA804C43217 for ; Thu, 26 May 2022 17:39:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348324AbiEZRjK (ORCPT ); Thu, 26 May 2022 13:39:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343972AbiEZRjI (ORCPT ); Thu, 26 May 2022 13:39:08 -0400 Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5FCE49A980 for ; Thu, 26 May 2022 10:39:06 -0700 (PDT) Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.17.1.5/8.17.1.5) with ESMTP id 24QF3hSF012028 for ; Thu, 26 May 2022 10:39:05 -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=CHkVmanun6GHuUP4Cg6nbmQ2wQHDke+Cbgl3CRSd104=; b=HF8SUG8KP44A//ltyEBb1Twa4WG7C7D+d7U6W3YEHmRiHfqa5f6TKbeAE+pH2A9AJg7X sotUKP85d6hERENJMfUp9e/m/Z+8RcJqb6h23iKf7sHK/k/INs6DWflOQquA9CZ8GUGO 16PorU0AKE0AUP+gxcM3CWt0gKYBPsftU/Y= Received: from maileast.thefacebook.com ([163.114.130.16]) by m0001303.ppops.net (PPS) with ESMTPS id 3g9qtug2fy-13 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 26 May 2022 10:39:05 -0700 Received: from twshared19572.14.frc2.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Thu, 26 May 2022 10:39:01 -0700 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id 80733FA621D8; Thu, 26 May 2022 10:38:45 -0700 (PDT) From: Stefan Roesch To: , , , , CC: , , , Subject: [PATCH v6 06/16] fs: Add check for async buffered writes to generic_write_checks Date: Thu, 26 May 2022 10:38:30 -0700 Message-ID: <20220526173840.578265-7-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220526173840.578265-1-shr@fb.com> References: <20220526173840.578265-1-shr@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: GgBbK2SHwZbjB0SMUq1YIid3QI5FbgNO X-Proofpoint-ORIG-GUID: GgBbK2SHwZbjB0SMUq1YIid3QI5FbgNO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-26_09,2022-05-25_02,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org This introduces the flag FMODE_BUF_WASYNC. If devices support async buffered writes, this flag can be set. It also modifies the check in generic_write_checks to take async buffered writes into consideration. Signed-off-by: Stefan Roesch Reviewed-by: Christoph Hellwig --- fs/read_write.c | 4 +++- include/linux/fs.h | 3 +++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/read_write.c b/fs/read_write.c index e643aec2b0ef..175d98713b9a 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1633,7 +1633,9 @@ int generic_write_checks_count(struct kiocb *iocb, loff_t *count) if (iocb->ki_flags & IOCB_APPEND) iocb->ki_pos = i_size_read(inode); - if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) + if ((iocb->ki_flags & IOCB_NOWAIT) && + !((iocb->ki_flags & IOCB_DIRECT) || + (file->f_mode & FMODE_BUF_WASYNC))) return -EINVAL; return generic_write_check_limits(iocb->ki_filp, iocb->ki_pos, count); diff --git a/include/linux/fs.h b/include/linux/fs.h index 87b5af1d9fbe..407ad5004f54 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -177,6 +177,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset, /* File supports async buffered reads */ #define FMODE_BUF_RASYNC ((__force fmode_t)0x40000000) +/* File supports async nowait buffered writes */ +#define FMODE_BUF_WASYNC ((__force fmode_t)0x80000000) + /* * Attribute flags. These should be or-ed together to figure out what * has been changed!