From patchwork Thu Oct 17 16:09:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13840321 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 597181DF729 for ; Thu, 17 Oct 2024 16:10:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.145.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729181434; cv=none; b=DpSosSkLj8FMk/Rx4xPMGTlM19vH2+agX9bjJ4BSMOsG28Rx0BC1Lv4jh/gYffbyLcQcZtxocVQlb/IAu0klaluCH7JrD8R6tRS2ETv8KjNjTE0mWFv4CTxWyAomGmsKGZHLGzQzR99dIbci9C1LBuCLB7u+145xf32ZAdP8z/Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729181434; c=relaxed/simple; bh=p/pdlwEOz7x4atHfPH22yaUj+cFfP6Ldj5Fdo1PQsAg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=VpzN3Nt3IaTxjEYWkXtmmNU4zUYS6HoA+AlUDKnWtx194g5/jVqXhDIDRlgvTkUdrYZNWmqwLmB3tlOqJz9O1oBpKu7sAOw2wV+QK++mgjJh+WcKqDmQ+OhVYycC0AhVwRPuV4JNSfdbXQ3djeBM7yzWzDpieh76vYd6jUwzOHk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com; spf=pass smtp.mailfrom=meta.com; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b=IpsQFmON; arc=none smtp.client-ip=67.231.145.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=meta.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b="IpsQFmON" Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49HCgsBK003824 for ; Thu, 17 Oct 2024 09:10:32 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=s2048-2021-q4; bh=8XyX8u59mNjnQPnGrxzikA04q0KGVl3u3qy1AjZng4g=; b=IpsQFmON4IMW CH/iLUNJvCbdArXLLYsgLxtHPtSmunWocZc6QSNJUgBUeoJdHYieF6TQTIksvdln 7Z9xPLofaq/X2vsdEDJpYSB3/+UjVzv4sj2ZUn0QEOT0uF2iekQaLEQyctRrWLdX a3qhXO7MdefRTbpkdejv4s7txNh2yjT4sESFXtxiAYfC1fNGbxu4rGibsrBrfYLK rKsphDuZCxF2Y1Eb+de/UdcJKLurqYJuescb0DpZ73MvSrYZ7iDi+4yWiH1US/Bu t5V+xB0T7zDgkhiWoiEfIX1KDgR1Zazem27gFeqbeoJZhg3ePEH9TDn6qMKhn+SC 6TsjdCIi7g== Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 42a9tjkbjn-16 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 17 Oct 2024 09:10:32 -0700 (PDT) Received: from twshared4085.05.ash9.facebook.com (2620:10d:c0a8:1b::30) by mail.thefacebook.com (2620:10d:c0a9:6f::237c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Thu, 17 Oct 2024 16:10:23 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 2C20E143A4AFC; Thu, 17 Oct 2024 09:10:14 -0700 (PDT) From: Keith Busch To: , , , , CC: , , , Keith Busch Subject: [PATCHv8 4/6] fs: introduce per-io hint support flag Date: Thu, 17 Oct 2024 09:09:35 -0700 Message-ID: <20241017160937.2283225-5-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241017160937.2283225-1-kbusch@meta.com> References: <20241017160937.2283225-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-ORIG-GUID: y6vnruTOA1ibLpqMudlL4Zh590nmvtCA X-Proofpoint-GUID: y6vnruTOA1ibLpqMudlL4Zh590nmvtCA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-05_02,2024-10-04_01,2024-09-30_01 From: Keith Busch A block device may support write hints on a per-io basis. The raw block file operations can effectively use these, but real filesystems are not ready to make use of this. Provide a file_operations flag to indicate support, and set it for the block file operations. Signed-off-by: Keith Busch Reviewed-by: Hannes Reinecke --- block/fops.c | 2 +- include/linux/fs.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/block/fops.c b/block/fops.c index d0b16d3975fd6..15a63e26161ea 100644 --- a/block/fops.c +++ b/block/fops.c @@ -869,7 +869,7 @@ const struct file_operations def_blk_fops = { .splice_write = iter_file_splice_write, .fallocate = blkdev_fallocate, .uring_cmd = blkdev_uring_cmd, - .fop_flags = FOP_BUFFER_RASYNC, + .fop_flags = FOP_BUFFER_RASYNC | FOP_PER_IO_HINTS, }; static __init int blkdev_init(void) diff --git a/include/linux/fs.h b/include/linux/fs.h index 04e875a37f604..026dc9801dc20 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2117,6 +2117,8 @@ struct file_operations { #define FOP_HUGE_PAGES ((__force fop_flags_t)(1 << 4)) /* Treat loff_t as unsigned (e.g., /dev/mem) */ #define FOP_UNSIGNED_OFFSET ((__force fop_flags_t)(1 << 5)) +/* File system can handle per-io hints */ +#define FOP_PER_IO_HINTS ((__force fop_flags_t)(1 << 6)) /* Wrap a directory iterator that needs exclusive inode access */ int wrap_directory_iterator(struct file *, struct dir_context *,