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Message-ID: <20230830000839.GB461907@ZenIV>
Date:   Wed, 30 Aug 2023 01:08:39 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     Christian Brauner <brauner@...nel.org>,
        Brad Warrum <bwarrum@...ux.ibm.com>,
        Ritu Agarwal <rituagar@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ian Kent <raven@...maw.net>,
        "Tigran A. Aivazian" <aivazian.tigran@...il.com>,
        Jeremy Kerr <jk@...abs.org>, Ard Biesheuvel <ardb@...nel.org>,
        Namjae Jeon <linkinjeon@...nel.org>,
        Sungjong Seo <sj1557.seo@...sung.com>,
        Steve French <sfrench@...ba.org>,
        Paulo Alcantara <pc@...guebit.com>,
        Ronnie Sahlberg <lsahlber@...hat.com>,
        Shyam Prasad N <sprasad@...rosoft.com>,
        Tom Talpey <tom@...pey.com>,
        John Johansen <john.johansen@...onical.com>,
        Paul Moore <paul@...l-moore.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Ruihan Li <lrh2000@....edu.cn>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        autofs@...r.kernel.org, linux-efi@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, apparmor@...ts.ubuntu.com,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v2 0/8] fs: add some missing ctime updates

On Mon, Jun 12, 2023 at 06:45:16AM -0400, Jeff Layton wrote:
> Jeff Layton (8):
>   ibmvmc: update ctime in conjunction with mtime on write
>   usb: update the ctime as well when updating mtime after an ioctl
>   autofs: set ctime as well when mtime changes on a dir
>   bfs: update ctime in addition to mtime when adding entries
>   efivarfs: update ctime when mtime changes on a write
>   exfat: ensure that ctime is updated whenever the mtime is
>   apparmor: update ctime whenever the mtime changes on an inode
>   cifs: update the ctime on a partial page write
> 
>  drivers/misc/ibmvmc.c             |  2 +-
>  drivers/usb/core/devio.c          | 16 ++++++++--------
>  fs/autofs/root.c                  |  6 +++---
>  fs/bfs/dir.c                      |  2 +-
>  fs/efivarfs/file.c                |  2 +-
>  fs/exfat/namei.c                  |  8 ++++----
>  fs/smb/client/file.c              |  2 +-
>  security/apparmor/apparmorfs.c    |  7 +++++--
>  security/apparmor/policy_unpack.c | 11 +++++++----
>  9 files changed, 31 insertions(+), 25 deletions(-)

As a possible followup (again, apologies for being MIA for months):
touch_cmtime(inode)...

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