From patchwork Tue Dec 19 00:07:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13497740 Received: from mail-pl1-f180.google.com (mail-pl1-f180.google.com [209.85.214.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6489715AC; Tue, 19 Dec 2023 00:08:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-f180.google.com with SMTP id d9443c01a7336-1d3dc30ae01so1258575ad.0; Mon, 18 Dec 2023 16:08:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702944521; x=1703549321; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UX2AqNGNajm/tepWLqi5DpfhfQCLB1wKlvs8RQ7Asx4=; b=KwYusEcLKEbLb0ISzaK4ftDOOOr5eYdg+bgDf/rm/tztSQI4TBf/aENeNcZMQFEY0Z jOsR4XKNnlvCZ9fLgnlqf9KKLkS0hVba2faMo8p0yFStI+dmk22DeCdhodh0T9LQzOj0 bn5wFuUtruetr0sPvj83sj+3rkbjY+pZiJ+NgJds1hO2hqCsiuZAMbC6QC09W/aDHSux qjTyVH9s6m/awKbxjSqcqnYhpJvD8bz+PpAOgiL0P2ZZdpApo6xvRY6JqtuSBD51f3NG 29FfHYyiIxYq9W/aBBNipblpbKhvDoLfEeZuKXoIBxhDXyeLY9hJbAHQ9OSsCwe7VLrV yytQ== X-Gm-Message-State: AOJu0YzZ4RMrJcuRELW9Sga2iYHuSUJ6MyJKsiD3K2JN/8x3SCPzSWYX 8czQoXPStki+8wxvz3HaPvM= X-Google-Smtp-Source: AGHT+IEmj3kamI3VsxdqaEabn9RtMOl6kBEZX6XfMNxPzJ20y98OnyfmHTuoiLefyC4//1qIfnkGEA== X-Received: by 2002:a17:903:2304:b0:1d3:b3b7:5db0 with SMTP id d4-20020a170903230400b001d3b3b75db0mr3429695plh.4.1702944521612; Mon, 18 Dec 2023 16:08:41 -0800 (PST) Received: from bvanassche-linux.mtv.corp.google.com ([2620:0:1000:8411:e67:7ba6:36a9:8cd5]) by smtp.gmail.com with ESMTPSA id x17-20020a17090a531100b0028b050e8297sm118630pjh.18.2023.12.18.16.08.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Dec 2023 16:08:41 -0800 (PST) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jens Axboe , Christoph Hellwig , Daejun Park , Kanchan Joshi , Bart Van Assche , Alexander Viro , Christian Brauner , Jeff Layton , Chuck Lever Subject: [PATCH v8 06/19] block, fs: Propagate write hints to the block device inode Date: Mon, 18 Dec 2023 16:07:39 -0800 Message-ID: <20231219000815.2739120-7-bvanassche@acm.org> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog In-Reply-To: <20231219000815.2739120-1-bvanassche@acm.org> References: <20231219000815.2739120-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Write hints applied with F_SET_RW_HINT on a block device affect the shmem inode only. Propagate these hints to the block device inode because that is the inode used when writing back dirty pages. Cc: Alexander Viro Cc: Christian Brauner Cc: Jens Axboe Cc: Christoph Hellwig Cc: Jeff Layton Cc: Chuck Lever Signed-off-by: Bart Van Assche --- block/fops.c | 11 +++++++++++ fs/fcntl.c | 4 ++++ include/linux/fs.h | 1 + 3 files changed, 16 insertions(+) diff --git a/block/fops.c b/block/fops.c index 787ce52bc2c6..138b388b5cb1 100644 --- a/block/fops.c +++ b/block/fops.c @@ -620,6 +620,16 @@ static int blkdev_release(struct inode *inode, struct file *filp) return 0; } +static void blkdev_apply_whint(struct file *file, enum rw_hint hint) +{ + struct bdev_handle *handle = file->private_data; + struct inode *bd_inode = handle->bdev->bd_inode; + + inode_lock(bd_inode); + bd_inode->i_write_hint = hint; + inode_unlock(bd_inode); +} + static ssize_t blkdev_direct_write(struct kiocb *iocb, struct iov_iter *from) { @@ -854,6 +864,7 @@ const struct file_operations def_blk_fops = { .splice_read = filemap_splice_read, .splice_write = iter_file_splice_write, .fallocate = blkdev_fallocate, + .apply_whint = blkdev_apply_whint, }; static __init int blkdev_init(void) diff --git a/fs/fcntl.c b/fs/fcntl.c index fc73c5fae43c..18407bf5bb9b 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -306,6 +306,7 @@ static long fcntl_get_rw_hint(struct file *file, unsigned int cmd, static long fcntl_set_rw_hint(struct file *file, unsigned int cmd, unsigned long arg) { + void (*apply_whint)(struct file *, enum rw_hint); struct inode *inode = file_inode(file); u64 __user *argp = (u64 __user *)arg; u64 hint; @@ -317,6 +318,9 @@ static long fcntl_set_rw_hint(struct file *file, unsigned int cmd, inode_lock(inode); inode->i_write_hint = hint; + apply_whint = inode->i_fop->apply_whint; + if (apply_whint) + apply_whint(file, hint); inode_unlock(inode); return 0; diff --git a/include/linux/fs.h b/include/linux/fs.h index a08014b68d6e..293017ea2466 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1944,6 +1944,7 @@ struct file_operations { int (*uring_cmd)(struct io_uring_cmd *ioucmd, unsigned int issue_flags); int (*uring_cmd_iopoll)(struct io_uring_cmd *, struct io_comp_batch *, unsigned int poll_flags); + void (*apply_whint)(struct file *, enum rw_hint hint); } __randomize_layout; /* Wrap a directory iterator that needs exclusive inode access */