From: Gao Xiang <hsiangkao@linux.alibaba.com>
To: Hongbo Li <lihongbo22@huawei.com>, Amir Goldstein <amir73il@gmail.com>
Cc: linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org,
linux-kernel@vger.kernel.org, Chao Yu <chao@kernel.org>,
Christian Brauner <brauner@kernel.org>,
"Darrick J. Wong" <djwong@kernel.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v10 03/10] fs: Export alloc_empty_backing_file
Date: Tue, 23 Dec 2025 16:31:42 +0800 [thread overview]
Message-ID: <e143fe52-d704-46d3-9389-21645bb19059@linux.alibaba.com> (raw)
In-Reply-To: <20251223015618.485626-4-lihongbo22@huawei.com>
On 2025/12/23 09:56, Hongbo Li wrote:
> There is no need to open nonexistent real files if backing files
> couldn't be backed by real files (e.g., EROFS page cache sharing
> doesn't need typical real files to open again).
>
> Therefore, we export the alloc_empty_backing_file() helper, allowing
> filesystems to dynamically set the backing file without real file
> open. This is particularly useful for obtaining the correct @path
> and @inode when calling file_user_path() and file_user_inode().
>
> Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
(I hope Amir could ack this particular patch too..)
Thanks,
Gao Xiang
next prev parent reply other threads:[~2025-12-23 8:31 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-23 1:56 [PATCH v10 00/10] erofs: Introduce page cache sharing feature Hongbo Li
2025-12-23 1:56 ` [PATCH v10 01/10] iomap: stash iomap read ctx in the private field of iomap_iter Hongbo Li
2025-12-23 2:32 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 02/10] erofs: hold read context in iomap_iter if needed Hongbo Li
2025-12-23 2:32 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 03/10] fs: Export alloc_empty_backing_file Hongbo Li
2025-12-23 8:31 ` Gao Xiang [this message]
2025-12-23 12:40 ` Amir Goldstein
2025-12-23 1:56 ` [PATCH v10 04/10] erofs: move `struct erofs_anon_fs_type` to super.c Hongbo Li
2025-12-23 8:30 ` Gao Xiang
2025-12-23 9:28 ` Hongbo Li
2025-12-23 1:56 ` [PATCH v10 05/10] erofs: support user-defined fingerprint name Hongbo Li
2025-12-23 7:22 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 06/10] erofs: support domain-specific page cache share Hongbo Li
2025-12-23 7:25 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 07/10] erofs: introduce the page cache share feature Hongbo Li
2025-12-23 8:11 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 08/10] erofs: support unencoded inodes for page cache share Hongbo Li
2025-12-23 8:15 ` Gao Xiang
2025-12-23 8:34 ` Gao Xiang
2025-12-23 1:56 ` [PATCH v10 09/10] erofs: support compressed " Hongbo Li
2025-12-23 8:18 ` Gao Xiang
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