Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path

[PATCH v3 0/3] Reduce impact of overlayfs backing files fake path · Amir Goldstein <amir73il@gmail.com> · 2023-10-09
[PATCH v3 2/3] fs: create helper file_user_path() for user displayed mapped file path · Amir Goldstein <amir73il@gmail.com> · 2023-10-09
[PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-09
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Miklos Szeredi <miklos@szeredi.hu> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Miklos Szeredi <miklos@szeredi.hu> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Al Viro <viro@zeniv.linux.org.uk> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Al Viro <viro@zeniv.linux.org.uk> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Al Viro <viro@zeniv.linux.org.uk> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Amir Goldstein <amir73il@gmail.com> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Al Viro <viro@zeniv.linux.org.uk> · 2023-10-11
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Miklos Szeredi <miklos@szeredi.hu> · 2023-10-10
Re: [PATCH v3 3/3] fs: store real path instead of fake path in backing file f_path · Al Viro <viro@zeniv.linux.org.uk> · 2023-10-11
[PATCH v3 1/3] fs: get mnt_writers count for an open backing file's real path · Amir Goldstein <amir73il@gmail.com> · 2023-10-09
Re: [PATCH v3 0/3] Reduce impact of overlayfs backing files fake path · Christian Brauner <brauner@kernel.org> · 2023-10-10

From: Miklos Szeredi <miklos@szeredi.hu>
Date: 2023-10-10 13:35:04
Also in: linux-fsdevel, linux-integrity, linux-unionfs

On Tue, 10 Oct 2023 at 15:17, Amir Goldstein [off-list ref] wrote:

Sorry, you asked about ovl mount.
To me it makes sense that if users observe ovl paths in writable mapped
memory, that ovl should not be remounted RO.
Anyway, I don't see a good reason to allow remount RO for ovl in that case.
Is there?

Agreed.

But is preventing remount RO important enough to warrant special
casing of backing file in generic code?  I'm not convinced either
way...

Thanks,
Miklos

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