From patchwork Sat Apr 6 09:09:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13619723 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) (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 7E93236B17; Sat, 6 Apr 2024 09:17:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712395073; cv=none; b=jczoEjb31rCAgtCBjcjl7Br2jJDmQ+knv/E0ygl99PMSi6GL+GqHdCewSOK9+fRyCUc6DEKcqoq60TNVZnvVHpeVMJKiYOGX//xIUVNIDzYSzu3jeBanJvmzmGW+b8P52LYCvuN03X03CEDVxnrg8Q7Azz0ARXb3Wk7niW+JcOQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712395073; c=relaxed/simple; bh=NbjIZxMOKnTQPzGEJd3Cu63LI5ii2Hm3loSg5zcCzpk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=jUR0j3yBiLVU9NuD0nmxEXDLDZB9jHT4w4MGbXr+0uZhXA/axY8uBqwtsES1NmOfu4ilU9SaQveh2gGEY/DuvecTDvqJ8lziram7kx/3vaJytjW6aYCNJOt//eSgZkQslPDhnrX3vSmDeCZ5WXSalbhmYSCfZpCi7nKRFQhFcBc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4VBVBJ3WXKz4f3jkC; Sat, 6 Apr 2024 17:17:44 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id C64981A058D; Sat, 6 Apr 2024 17:17:48 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgAn+REyExFm0JDpJA--.50223S20; Sat, 06 Apr 2024 17:17:48 +0800 (CST) From: Yu Kuai To: jack@suse.cz, hch@lst.de, brauner@kernel.org, viro@zeniv.linux.org.uk, axboe@kernel.dk Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, yi.zhang@huawei.com, yangerkun@huawei.com, yukuai3@huawei.com Subject: [PATCH vfs.all 16/26] bcache: prevent direct access of bd_inode Date: Sat, 6 Apr 2024 17:09:20 +0800 Message-Id: <20240406090930.2252838-17-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240406090930.2252838-1-yukuai1@huaweicloud.com> References: <20240406090930.2252838-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: cCh0CgAn+REyExFm0JDpJA--.50223S20 X-Coremail-Antispam: 1UD129KBjvJXoW7uFWrJF4rCw4kZw43KFWUXFb_yoW8XF4fpF 9xCayjqrW8Ww48u3yUXr4DuFyrKwnIyayIk34xu34ava9Fqr9Y9FW5GryUuryFqry8Gwsr XF17Kry7Cr1kC3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBSb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_Gr0_Xr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAI cVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2js IEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxUFgAwUUUUU X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ From: Yu Kuai Now that all bcache stash the file of opened bdev, it's ok to get mapping from the file. Signed-off-by: Yu Kuai Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- drivers/md/bcache/super.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 330bcd9ea4a9..be8565691abe 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -163,15 +163,16 @@ static const char *read_super_common(struct cache_sb *sb, struct block_device * } -static const char *read_super(struct cache_sb *sb, struct block_device *bdev, +static const char *read_super(struct cache_sb *sb, struct file *bdev_file, struct cache_sb_disk **res) { const char *err; + struct block_device *bdev = file_bdev(bdev_file); struct cache_sb_disk *s; struct page *page; unsigned int i; - page = read_cache_page_gfp(bdev->bd_inode->i_mapping, + page = read_cache_page_gfp(bdev_file->f_mapping, SB_OFFSET >> PAGE_SHIFT, GFP_KERNEL); if (IS_ERR(page)) return "IO error"; @@ -2558,7 +2559,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, if (set_blocksize(file_bdev(bdev_file), 4096)) goto out_blkdev_put; - err = read_super(sb, file_bdev(bdev_file), &sb_disk); + err = read_super(sb, bdev_file, &sb_disk); if (err) goto out_blkdev_put;