From patchwork Fri Dec 6 01:53:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13896263 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) (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 D540213C8FF for ; Fri, 6 Dec 2024 01:53:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.153.30 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733450011; cv=none; b=nRiLKuPlUQCqhO0+DLPL69uvdM06ma8il7GThk/BD1lMWGN54g4gRlT8GidXvvf2goPOw4uqdZxr+uMiulyAtMYvhWLgLFTxmkc+mz5p8J4ehaO2YDwS3mCsmpVSKX+wqQxlNOMhVr50drvtObjDT0E6I8ybGoTNq6iW4CD61gQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733450011; c=relaxed/simple; bh=TCNBtOVAlz4CYyfyNN08IAP8Ch7Vv7aWrtZDtfmR0VA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Zighmtfk7lMM78007bVC9D+g8pzUCyCTlfwwSs8KwtaGF1XMHvp5lFjuTDFPiyc+9DfVWfKNZVIVjQ/sWvFG9ZaOKrTOR8KD6907c5+zAPD6AFA+ZvMxpqtYQ1iW3e6F1dhq0y52vqvwJwN/NnKXJhzEg5XmkrlCnLbTAU09LeQ= 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=JlMQby/y; arc=none smtp.client-ip=67.231.153.30 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="JlMQby/y" Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4B603JgZ014117 for ; Thu, 5 Dec 2024 17:53:28 -0800 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=29G8/mCPCEmN9MtdiNCjD+XztU6EWmg+eIHaaiD06/k=; b=JlMQby/y2Eku 0vOi6Y74b8SkU5qFOYpmibZ40iLDFQjQtwLD/kh5utUz2YnGIm6Dtd5oYNHXY9Wa YYsqdHSPlTM7iMhNHS7v8xQD7A2BvAf45tz1fXivx02kPwb53Z2NxXUlmcZ27pT8 Ie8xCc6MkMv4n39zNh8quAnjpRmfI7lObWGoeMiRgd5gqbt0uEZHpjh1c4a5aAoR PDqar0S+MLv0/r5+QBzfosbqH3QLm2LcJ+TktcZMmu9QB5UGeCHwf6T9O5k1zMvy klpjONh83Mfy3cbLuJx2OH/PbNWnopQ5+TGXope5tVb7sNQVDwxP2eQ4wLpx/8gL 1cKePzcb/A== Received: from maileast.thefacebook.com ([163.114.135.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 43bmru153e-4 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 05 Dec 2024 17:53:28 -0800 (PST) Received: from twshared32179.32.frc3.facebook.com (2620:10d:c0a8:1b::8e35) by mail.thefacebook.com (2620:10d:c0a9:6f::8fd4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Fri, 6 Dec 2024 01:53:22 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 20F4A15B21153; Thu, 5 Dec 2024 17:53:09 -0800 (PST) From: Keith Busch To: , , , , , CC: , , Keith Busch Subject: [PATCHv11 05/10] block: introduce max_write_streams queue limit Date: Thu, 5 Dec 2024 17:53:03 -0800 Message-ID: <20241206015308.3342386-6-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241206015308.3342386-1-kbusch@meta.com> References: <20241206015308.3342386-1-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-GUID: 0CdM9xi2Ecf05YOcMuEYseoy_kKxXIHq X-Proofpoint-ORIG-GUID: 0CdM9xi2Ecf05YOcMuEYseoy_kKxXIHq 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_03,2024-10-04_01,2024-09-30_01 From: Keith Busch Drivers with hardware that support write streams need a way to export how many are available so applications can generically query this. Signed-off-by: Keith Busch [hch: renamed hints to streams, removed stacking] Signed-off-by: Christoph Hellwig --- Documentation/ABI/stable/sysfs-block | 7 +++++++ block/blk-sysfs.c | 3 +++ include/linux/blkdev.h | 9 +++++++++ 3 files changed, 19 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index 0cceb2badc836..f67139b8b8eff 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -506,6 +506,13 @@ Description: [RO] Maximum size in bytes of a single element in a DMA scatter/gather list. +What: /sys/block//queue/max_write_streams +Date: November 2024 +Contact: linux-block@vger.kernel.org +Description: + [RO] Maximum number of write streams supported, 0 if not + supported. If supported, valid values are 1 through + max_write_streams, inclusive. What: /sys/block//queue/max_segments Date: March 2010 diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 4241aea84161c..c514c0cb5e93c 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -104,6 +104,7 @@ QUEUE_SYSFS_LIMIT_SHOW(max_segments) QUEUE_SYSFS_LIMIT_SHOW(max_discard_segments) QUEUE_SYSFS_LIMIT_SHOW(max_integrity_segments) QUEUE_SYSFS_LIMIT_SHOW(max_segment_size) +QUEUE_SYSFS_LIMIT_SHOW(max_write_streams) QUEUE_SYSFS_LIMIT_SHOW(logical_block_size) QUEUE_SYSFS_LIMIT_SHOW(physical_block_size) QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors) @@ -446,6 +447,7 @@ QUEUE_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); QUEUE_RO_ENTRY(queue_max_segments, "max_segments"); QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size"); +QUEUE_RO_ENTRY(queue_max_write_streams, "max_write_streams"); QUEUE_RW_LOAD_MODULE_ENTRY(elv_iosched, "scheduler"); QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); @@ -580,6 +582,7 @@ static struct attribute *queue_attrs[] = { &queue_max_discard_segments_entry.attr, &queue_max_integrity_segments_entry.attr, &queue_max_segment_size_entry.attr, + &queue_max_write_streams_entry.attr, &queue_hw_sector_size_entry.attr, &queue_logical_block_size_entry.attr, &queue_physical_block_size_entry.attr, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 08a727b408164..ce2c3ddda2411 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -399,6 +399,8 @@ struct queue_limits { unsigned short max_integrity_segments; unsigned short max_discard_segments; + unsigned short max_write_streams; + unsigned int max_open_zones; unsigned int max_active_zones; @@ -1240,6 +1242,13 @@ static inline unsigned int bdev_max_segments(struct block_device *bdev) return queue_max_segments(bdev_get_queue(bdev)); } +static inline unsigned short bdev_max_write_streams(struct block_device *bdev) +{ + if (bdev_is_partition(bdev)) + return 0; + return bdev_limits(bdev)->max_write_streams; +} + static inline unsigned queue_logical_block_size(const struct request_queue *q) { return q->limits.logical_block_size;