From patchwork Tue Oct 29 15:19:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13855079 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 34A001946A2 for ; Tue, 29 Oct 2024 15:19:55 +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=1730215198; cv=none; b=Q4vU5RzTmz4RCaOdeHaSHucNubiL/LxyjWp/uVEweZ53Ss9lysMjShU+uHFJ+zys+EButs+p6aWRNwIU/KmcZTFOJKrDvM0fd3TyVh7loYJiT7CTAOnuhP1qZJJF9LF0oyXcxKhzvXuUaq0kxLJv+jAtrbPcS3cfwE2EwexsXXM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730215198; c=relaxed/simple; bh=GD7uThjhDzyP28oGcsmN6/eNWGUs4YiXhY9KVTQmUTE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FVb0E7Vfl7ZRiCZPV6gDG15miDPPdtdP/Dsm1EOG2/YqccsEIFilnCaAISL731QFV2Lb0ab1r6qqJFfg4FktCsvtoIQ+4R2MIKME6gHLaZ2nJ3ViUJn4GeqSjANzpD2WGjg3xpRwRF9iPhqSiQhhK5kuKJrXEL1TzBPBkAyh3Ds= 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=Ho3jedvR; 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="Ho3jedvR" Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.18.1.2/8.18.1.2) with ESMTP id 49TD7Abd021211 for ; Tue, 29 Oct 2024 08:19:55 -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=7vuu9MU8HwzONpvRjqiHwphNE/Y6asPy43+abByRhi8=; b=Ho3jedvRtHL/ 2BIwDRamOsQyk4bI0ern4VkA0Sgxm9CGZRA7LFeFM/8Sokt+oJIFrVBgg57/ro6e 4EH2C4uv9ohV4DiI0t2VJPll7Y/ADbUIFNUXC73O4eG+kCJ+k32fnuq7yEWH6mI1 6jgMa4/ZNWPvHbifiA3s/NzfL4/pyx1jrMQ8FzfnXY4Ua8PkGZ2NGye+XnKOnDoY MunY6kSk8oQ6fE/krdLzs2hnL0SdZm26LjcVGXStmKbejOYv+Pv6jVtKQihIvBct 1JchLnv0UC4SysCD62DjH6oJuE8WGuLE79n5YhuhjiRqb2rAOado9J+P8rQCM8xY e8v7XR8gNQ== Received: from maileast.thefacebook.com ([163.114.135.16]) by m0001303.ppops.net (PPS) with ESMTPS id 42k0af13x0-14 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 29 Oct 2024 08:19:54 -0700 (PDT) Received: from twshared26373.08.ash9.facebook.com (2620:10d:c0a8:fe::f072) 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; Tue, 29 Oct 2024 15:19:47 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 1676C14920EA5; Tue, 29 Oct 2024 08:19:44 -0700 (PDT) From: Keith Busch To: , , , CC: , , , , , Keith Busch Subject: [PATCHv10 5/9] block, fs: add write hint to kiocb Date: Tue, 29 Oct 2024 08:19:18 -0700 Message-ID: <20241029151922.459139-6-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241029151922.459139-1-kbusch@meta.com> References: <20241029151922.459139-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: zGKihF5yuVSeyo9r7msC7AxDVY9VDXbp X-Proofpoint-ORIG-GUID: zGKihF5yuVSeyo9r7msC7AxDVY9VDXbp 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 This prepares for sources other than the inode to provide a write hint. The block layer will use it for direct IO if the requested hint is within the block device's allowed hints. Signed-off-by: Keith Busch --- block/fops.c | 31 ++++++++++++++++++++++++++++--- include/linux/fs.h | 1 + 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/block/fops.c b/block/fops.c index 2d01c90076813..bb3855ee044f0 100644 --- a/block/fops.c +++ b/block/fops.c @@ -71,7 +71,7 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb, bio_init(&bio, bdev, vecs, nr_pages, dio_bio_write_op(iocb)); } bio.bi_iter.bi_sector = pos >> SECTOR_SHIFT; - bio.bi_write_hint = file_inode(iocb->ki_filp)->i_write_hint; + bio.bi_write_hint = iocb->ki_write_hint; bio.bi_ioprio = iocb->ki_ioprio; if (iocb->ki_flags & IOCB_ATOMIC) bio.bi_opf |= REQ_ATOMIC; @@ -200,7 +200,7 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, for (;;) { bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT; - bio->bi_write_hint = file_inode(iocb->ki_filp)->i_write_hint; + bio->bi_write_hint = iocb->ki_write_hint; bio->bi_private = dio; bio->bi_end_io = blkdev_bio_end_io; bio->bi_ioprio = iocb->ki_ioprio; @@ -316,7 +316,7 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, dio->flags = 0; dio->iocb = iocb; bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT; - bio->bi_write_hint = file_inode(iocb->ki_filp)->i_write_hint; + bio->bi_write_hint = iocb->ki_write_hint; bio->bi_end_io = blkdev_bio_end_io_async; bio->bi_ioprio = iocb->ki_ioprio; @@ -362,6 +362,23 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, return -EIOCBQUEUED; } +static int blkdev_write_hint(struct kiocb *iocb, struct block_device *bdev) +{ + u16 hint = iocb->ki_write_hint; + + if (!hint) + return file_inode(iocb->ki_filp)->i_write_hint; + + if (hint > bdev_max_write_hints(bdev)) + return -EINVAL; + + if (bdev_is_partition(bdev) && + !test_bit(hint - 1, bdev->write_hint_mask)) + return -EINVAL; + + return hint; +} + static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter) { struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host); @@ -373,6 +390,14 @@ static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter) if (blkdev_dio_invalid(bdev, iocb, iter)) return -EINVAL; + if (iov_iter_rw(iter) == WRITE) { + int hint = blkdev_write_hint(iocb, bdev); + + if (hint < 0) + return hint; + iocb->ki_write_hint = hint; + } + nr_pages = bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS + 1); if (likely(nr_pages <= BIO_MAX_VECS)) { if (is_sync_kiocb(iocb)) diff --git a/include/linux/fs.h b/include/linux/fs.h index 4b5cad44a1268..1a00accf412e5 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -370,6 +370,7 @@ struct kiocb { void *private; int ki_flags; u16 ki_ioprio; /* See linux/ioprio.h */ + u16 ki_write_hint; union { /* * Only used for async buffered reads, where it denotes the