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 65865C43334 for ; Thu, 30 Jun 2022 20:43:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237433AbiF3UnQ (ORCPT ); Thu, 30 Jun 2022 16:43:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237421AbiF3UnD (ORCPT ); Thu, 30 Jun 2022 16:43:03 -0400 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0753186D1 for ; Thu, 30 Jun 2022 13:43:02 -0700 (PDT) Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 25UGoxG7001290 for ; Thu, 30 Jun 2022 13:43:02 -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=MLry2TNqyft+XNkOpEGpBVNauRHTTVwTy2e0E5j67+M=; b=DwxWtWwGgFomaFybjRMT97ik8YpL3s0/Qz6AgnhYRPFdXHvpkrJYEUV+9TvUsaOOJ0Mb p7uhsvXOnQX5abwLNjBZmaoRllu8kdF7+iHyZJiqHsz2ynI9ZJjx5mp77leIIe5V6TuE xnQ+LuJ3WkELTNC7lZEayKWJ7LZw3IOhF8E= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3h150eebe6-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 30 Jun 2022 13:43:02 -0700 Received: from twshared5640.09.ash9.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; Thu, 30 Jun 2022 13:43:00 -0700 Received: by devbig007.nao1.facebook.com (Postfix, from userid 544533) id 228B15932DC4; Thu, 30 Jun 2022 13:42:30 -0700 (PDT) From: Keith Busch To: , , CC: , Kernel Team , , , , Keith Busch Subject: [PATCH 12/12] block: export and document bit_bucket attribute Date: Thu, 30 Jun 2022 13:42:12 -0700 Message-ID: <20220630204212.1265638-13-kbusch@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220630204212.1265638-1-kbusch@fb.com> References: <20220630204212.1265638-1-kbusch@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: WWhVOv2Gp7-CbuKHmw7tvU8RLJFKexsN X-Proofpoint-ORIG-GUID: WWhVOv2Gp7-CbuKHmw7tvU8RLJFKexsN X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-06-30_14,2022-06-28_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Keith Busch Now that user space applications can make use of partial sector reads, export and document the queue attribute that indicates if the capability is supported. Signed-off-by: Keith Busch --- Documentation/ABI/stable/sysfs-block | 9 +++++++++ block/blk-sysfs.c | 3 +++ 2 files changed, 12 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/sta= ble/sysfs-block index cd14ecb3c9a5..defc056690d0 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -142,6 +142,15 @@ Description: Default value of this file is '1'(on). =20 =20 +What: /sys/block//queue/bit_bucket +Date: June 2022 +Contact: linux-block@vger.kernel.org +Description: + [RO] This file indicates if the device supports partial sector + reads. If set to '1', user space can issue direct IO reads at + dma_alignment granularity. + + What: /sys/block//queue/chunk_sectors Date: September 2016 Contact: Hannes Reinecke diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 85ea43eff094..0c1f1c2fbb30 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -309,6 +309,7 @@ QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); +QUEUE_SYSFS_BIT_FNS(bit_bucket, BIT_BUCKET, 0); #undef QUEUE_SYSFS_BIT_FNS =20 static ssize_t queue_zoned_show(struct request_queue *q, char *page) @@ -627,6 +628,7 @@ QUEUE_RW_ENTRY(queue_nonrot, "rotational"); QUEUE_RW_ENTRY(queue_iostats, "iostats"); QUEUE_RW_ENTRY(queue_random, "add_random"); QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); +QUEUE_RW_ENTRY(queue_bit_bucket, "bit_bucket"); =20 static struct attribute *queue_attrs[] =3D { &queue_requests_entry.attr, @@ -653,6 +655,7 @@ static struct attribute *queue_attrs[] =3D { &queue_zone_append_max_entry.attr, &queue_zone_write_granularity_entry.attr, &queue_nonrot_entry.attr, + &queue_bit_bucket_entry.attr, &queue_zoned_entry.attr, &queue_nr_zones_entry.attr, &queue_max_open_zones_entry.attr, --=20 2.30.2