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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4FD77E668B2 for ; Sat, 20 Dec 2025 04:16:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E27F26B00A7; Fri, 19 Dec 2025 23:16:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DDCFC6B00A9; Fri, 19 Dec 2025 23:16:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CB5586B00AA; Fri, 19 Dec 2025 23:16:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id B19126B00A7 for ; Fri, 19 Dec 2025 23:16:19 -0500 (EST) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 85447B981B for ; Sat, 20 Dec 2025 04:16:19 +0000 (UTC) X-FDA: 84238537278.02.6800B48 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) by imf16.hostedemail.com (Postfix) with ESMTP id 1C73F180002 for ; Sat, 20 Dec 2025 04:16:16 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; spf=pass (imf16.hostedemail.com: domain of houtao@huaweicloud.com designates 45.249.212.56 as permitted sender) smtp.mailfrom=houtao@huaweicloud.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1766204177; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SJkD/tBeeEEJmstxapoYxLUzG9IOFg4LsR8Q3wzbbGs=; b=RECprWADzi07XEd0JUZZxdsH5wCfqc+89oA8OrLKcze5CMpBV8ucghwl4+xTTzY3coj+1E b1KmqS7F1z0gmspROiKkUJLnNuFOuP4OejbRje0QOE5P0o6SYmfgEwee8U9P+cNoue8UyB oaUAK2xtxiriRqmcDh3/0yGP8jCiDXI= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=none; spf=pass (imf16.hostedemail.com: domain of houtao@huaweicloud.com designates 45.249.212.56 as permitted sender) smtp.mailfrom=houtao@huaweicloud.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1766204177; a=rsa-sha256; cv=none; b=mj02hcNpeWLFwaFU6LAlydBqBwdId+Jj1DDiOiRvCgzJ69DbJEJCBbF8b420UcV8pe2HNj +ggGwYPrz6N6CjFVngBiGBXZsW7FRrYAW4aYpegnCTdJ0KO346+oLsHgw+Uuowx6i0WnBg oFxIBqjs1Ki2Vd3vArU/o3IjagSEm0I= Received: from mail.maildlp.com (unknown [172.19.163.198]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4dYB0T6tftzKHM0f for ; Sat, 20 Dec 2025 12:15:53 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 22B8840577 for ; Sat, 20 Dec 2025 12:16:07 +0800 (CST) Received: from huaweicloud.com (unknown [10.50.87.129]) by APP4 (Coremail) with SMTP id gCh0CgD3WPn5IkZpFwpFAw--.56015S9; Sat, 20 Dec 2025 12:16:06 +0800 (CST) From: Hou Tao To: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org, linux-mm@kvack.org, linux-nvme@lists.infradead.org, Bjorn Helgaas , Logan Gunthorpe , Alistair Popple , Leon Romanovsky , Greg Kroah-Hartman , Tejun Heo , "Rafael J . Wysocki" , Danilo Krummrich , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , houtao1@huawei.com Subject: [PATCH 05/13] sysfs: support get_unmapped_area callback for binary file Date: Sat, 20 Dec 2025 12:04:38 +0800 Message-Id: <20251220040446.274991-6-houtao@huaweicloud.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20251220040446.274991-1-houtao@huaweicloud.com> References: <20251220040446.274991-1-houtao@huaweicloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:gCh0CgD3WPn5IkZpFwpFAw--.56015S9 X-Coremail-Antispam: 1UD129KBjvJXoW7uF48Xw1DWw45tr1rXFy8AFb_yoW8uF4rpF sYk343XrZ7G3srKr9xAFW5W343KwnrGr1q9rZ2g343AwnrtF9Ig3yjya15JryrJrW8Cr1x KF429ryYkrW5G37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPlb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r126r1DMcIj6I8E87Iv67AKxVW8Jr0_Cr1UMcvjeVCFs4IE 7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxwCY1x0262 kKe7AKxVW8ZVWrXwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s02 6c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GF v_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvE c7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aV AFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZF pf9x07j4fO7UUUUU= X-CM-SenderInfo: xkrx3t3r6k3tpzhluzxrxghudrp/ X-Stat-Signature: 6hmqqki9ujazku75eftazwamgmk4mh5e X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 1C73F180002 X-HE-Tag: 1766204176-579274 X-HE-Meta: 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 OhIhFKVu 0EinecqF3dZcis2aq5ojWoyVKuyNa5dvqL81OuvwFEI+Qu4UiHw2R3D+U+1EYOkn7/6+oTPnM+tRZTca9j1yfJNkmM7x6uIf6A6fC X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Hou Tao Add support for ->get_unmapped_area callback for binary sysfs file. The following patch will use it to support compound page for p2pdma device memory when the device memory is mapped into userspace. Signed-off-by: Hou Tao --- fs/sysfs/file.c | 15 +++++++++++++++ include/linux/sysfs.h | 4 ++++ 2 files changed, 19 insertions(+) diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 3825e780cc58..e843795ebdc2 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -164,6 +164,20 @@ static ssize_t sysfs_kf_bin_write(struct kernfs_open_file *of, char *buf, return battr->write(of->file, kobj, battr, buf, pos, count); } +static unsigned long sysfs_kf_bin_get_unmapped_area(struct kernfs_open_file *of, + unsigned long uaddr, unsigned long len, + unsigned long pgoff, unsigned long flags) +{ + const struct bin_attribute *battr = of->kn->priv; + struct kobject *kobj; + + if (!battr->get_unmapped_area) + return -EOPNOTSUPP; + + kobj = sysfs_file_kobj(of->kn); + return battr->get_unmapped_area(of->file, kobj, battr, uaddr, len, pgoff, flags); +} + static int sysfs_kf_bin_mmap(struct kernfs_open_file *of, struct vm_area_struct *vma) { @@ -268,6 +282,7 @@ static const struct kernfs_ops sysfs_bin_kfops_mmap = { .mmap = sysfs_kf_bin_mmap, .open = sysfs_kf_bin_open, .llseek = sysfs_kf_bin_llseek, + .get_unmapped_area = sysfs_kf_bin_get_unmapped_area, }; int sysfs_add_file_mode_ns(struct kernfs_node *parent, diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index c33a96b7391a..f4a50f244f4d 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -321,6 +321,10 @@ struct bin_attribute { loff_t, int); int (*mmap)(struct file *, struct kobject *, const struct bin_attribute *attr, struct vm_area_struct *vma); + unsigned long (*get_unmapped_area)(struct file *, struct kobject *, + const struct bin_attribute *attr, + unsigned long uaddr, unsigned long len, + unsigned long pgoff, unsigned long flags); }; /** -- 2.29.2