linux-kernel - Re: [PATCH] overlayfs: set ctime when setting mtime and atime

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Message-Id: <20230914-hautarzt-bangen-f9ed9a2a3152@brauner>
Date:   Thu, 14 Sep 2023 10:39:23 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Amir Goldstein <amir73il@...il.com>
Cc:     Christian Brauner <brauner@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, Miklos Szeredi <miklos@...redi.hu>,
        Nathan Chancellor <nathan@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jeff Layton <jlayton@...nel.org>
Subject: Re: [PATCH] overlayfs: set ctime when setting mtime and atime

On Wed, 13 Sep 2023 09:33:12 -0400, Jeff Layton wrote:
> Nathan reported that he was seeing the new warning in
> setattr_copy_mgtime pop when starting podman containers. Overlayfs is
> trying to set the atime and mtime via notify_change without also
> setting the ctime.
> 
> POSIX states that when the atime and mtime are updated via utimes() that
> we must also update the ctime to the current time. The situation with
> overlayfs copy-up is analogies, so add ATTR_CTIME to the bitmask.
> notify_change will fill in the value.
> 
> [...]

Applied to the vfs.ctime branch of the vfs/vfs.git tree.
Patches in the vfs.ctime branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.ctime

[1/1] overlayfs: set ctime when setting mtime and atime
      https://git.kernel.org/vfs/vfs/c/f8edd3368615