From: Christian Brauner <brauner@kernel.org>
To: Hongbo Li <lihongbo22@huawei.com>
Cc: hsiangkao@linux.alibaba.com, chao@kernel.org, djwong@kernel.org,
amir73il@gmail.com, hch@lst.de, linux-fsdevel@vger.kernel.org,
linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v14 03/10] fs: Export alloc_empty_backing_file
Date: Mon, 12 Jan 2026 10:10:33 +0100 [thread overview]
Message-ID: <20260112-renitent-mitbringen-e94874417a07@brauner> (raw)
In-Reply-To: <20260109102856.598531-4-lihongbo22@huawei.com>
On Fri, Jan 09, 2026 at 10:28:49AM +0000, 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>
> Acked-by: Amir Goldstein <amir73il@gmail.com>
> ---
Acked-by: Christian Brauner <brauner@kernel.org>
next prev parent reply other threads:[~2026-01-12 9:10 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-09 10:28 [PATCH v14 00/10] erofs: Introduce page cache sharing feature Hongbo Li
2026-01-09 10:28 ` [PATCH v14 01/10] iomap: stash iomap read ctx in the private field of iomap_iter Hongbo Li
2026-01-09 18:14 ` Darrick J. Wong
2026-01-10 11:55 ` Gao Xiang
2026-01-09 10:28 ` [PATCH v14 02/10] erofs: hold read context in iomap_iter if needed Hongbo Li
2026-01-09 10:28 ` [PATCH v14 03/10] fs: Export alloc_empty_backing_file Hongbo Li
2026-01-12 9:10 ` Christian Brauner [this message]
2026-01-09 10:28 ` [PATCH v14 04/10] erofs: decouple `struct erofs_anon_fs_type` Hongbo Li
2026-01-09 10:28 ` [PATCH v14 05/10] erofs: support user-defined fingerprint name Hongbo Li
2026-01-09 10:28 ` [PATCH v14 06/10] erofs: support domain-specific page cache share Hongbo Li
2026-01-09 10:28 ` [PATCH v14 07/10] erofs: introduce the page cache share feature Hongbo Li
2026-01-14 10:18 ` Gao Xiang
2026-01-15 1:21 ` Hongbo Li
2026-01-15 1:43 ` Gao Xiang
2026-01-09 10:28 ` [PATCH v14 08/10] erofs: support unencoded inodes for page cache share Hongbo Li
2026-01-14 14:51 ` Gao Xiang
2026-01-15 1:36 ` Hongbo Li
2026-01-15 1:46 ` Gao Xiang
2026-01-15 1:47 ` Hongbo Li
2026-01-09 10:28 ` [PATCH v14 09/10] erofs: support compressed " Hongbo Li
2026-01-14 14:53 ` Gao Xiang
2026-01-09 10:28 ` [PATCH v14 10/10] erofs: implement .fadvise " Hongbo Li
2026-01-12 9:14 ` [PATCH v14 00/10] erofs: Introduce page cache sharing feature Christian Brauner
2026-01-12 14:40 ` Gao Xiang
2026-01-14 10:28 ` Gao Xiang
2026-01-14 15:34 ` Christian Brauner
2026-01-14 15:33 ` (subset) " Christian Brauner
2026-01-14 15:35 ` Christian Brauner
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