From patchwork Mon Feb 3 18:41:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13958016 Received: from mx0a-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 1301E1D5CC4 for ; Mon, 3 Feb 2025 18:44:00 +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=1738608242; cv=none; b=oq2xBDMQEuy94hm9hCDz2klQAFEUpKoJMRjSFtDYt3I/6fn8XKXRAlv+jEqz5OTmVtxnB7KPqiizIt0G/yIzaGqWVyjBN99huQpYSNo1Z36Uyu4ZUZQvqIx6APB5+TtuwUDHK8lrMOs7CKWKAoKtxfW7c5zEwHKJHYn6gXykfd8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738608242; c=relaxed/simple; bh=ktr9PiP+oadbzrXwSkUjSXD2dPHBC0UhG57Ju1uoEuk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gTg5BxExi6gE6z9WOee46HngU5Vj3wPIKbEmP5s+eRJE/ghDQEp2Q5jNSk31nVJq9j64H9nPf2mxz5/QNyLaxijvqgJnHHruix/dvZRn26GbOE7/Pa3yFlJd9Hf0lxPHR1vWBQoRUckPlNa8B2VqhbAQGKbyRiZT6+2NEky2NOA= 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=cb5NDdv2; 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="cb5NDdv2" Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.18.1.2/8.18.1.2) with ESMTP id 513IHqSh006896 for ; Mon, 3 Feb 2025 10:43:59 -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=vD+7nw2tYMtvjJDa1Yiet8R2DOiSYjvA3pTIKc83e0U=; b=cb5NDdv286fe BxtdSO0DIgVsyN/eMzpAwWDAw2FWXpf7to23pxs4TydYyYthX1L2fHZ/6JsCr456 EdF+Y7LrMPMgzh1rh9bNfDl0vILtN9A80ZofsjxDwga2OwJqQPJTdSdcxxb4ZHoq uUVBHBhZ6BkMjKlRxiMj3zJMdBWNVAQyA9aJrkgGHxTtf8Uk6Ug4TbLUXO4vHsLr L73fiaOVT3cn6fmjufx3B7VR47hCaTWSkjSvdkavNztAk6Ld1bzlQ/rzv9Sep99K +SVVvwQs+7c2DBnrCUWtWVhgs50Jc+fRBCOq9KbOa+yPcqFHe8oYZKchQPvU7aXd 6NF/b7+tXA== Received: from maileast.thefacebook.com ([163.114.135.16]) by m0089730.ppops.net (PPS) with ESMTPS id 44k21sgr9b-18 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 03 Feb 2025 10:43:59 -0800 (PST) Received: from twshared53813.03.ash8.facebook.com (2620:10d:c0a8:1b::8e35) 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 15.2.1544.14; Mon, 3 Feb 2025 18:43:52 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 95317179C2627; Mon, 3 Feb 2025 10:41:34 -0800 (PST) From: Keith Busch To: , , CC: , , , , , Keith Busch , Hannes Reinecke , Nitesh Shetty Subject: [PATCHv2 03/11] block: introduce max_write_streams queue limit Date: Mon, 3 Feb 2025 10:41:21 -0800 Message-ID: <20250203184129.1829324-4-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250203184129.1829324-1-kbusch@meta.com> References: <20250203184129.1829324-1-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: VpbZNXAvIy2NigzOuLh17ZoACXzkssQj X-Proofpoint-GUID: VpbZNXAvIy2NigzOuLh17ZoACXzkssQj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-03_08,2025-01-31_02,2024-11-22_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. Reviewed-by: Hannes Reinecke Reviewed-by: Nitesh Shetty Signed-off-by: Keith Busch [hch: renamed hints to streams, removed stacking] Signed-off-by: Christoph Hellwig Signed-off-by: Keith Busch --- 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 e09b455874bfd..8b8f2b0f0c048 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -106,6 +106,7 @@ 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) @@ -434,6 +435,7 @@ 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"); @@ -568,6 +570,7 @@ 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 76f0a4e7c2e5d..f92db4b35f4b6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -397,6 +397,8 @@ 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; @@ -1245,6 +1247,13 @@ 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;