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From:   Amir Goldstein <amir73il@gmail.com>
Date:   Fri, 21 May 2021 12:07:29 +0300
Message-ID: <CAOQ4uxi2G-RT1aLU337zDjWZxpi7aP-x-OTTL=5vGuf1H9DXjA@mail.gmail.com>
Subject: Re: [PATCH 05/11] inotify: Don't force FS_IN_IGNORED
To:     Gabriel Krisman Bertazi <krisman@collabora.com>
Cc:     kernel@collabora.com, "Darrick J . Wong" <djwong@kernel.org>,
        "Theodore Ts'o" <tytso@mit.edu>,
        Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.com>,
        David Howells <dhowells@redhat.com>,
        Khazhismel Kumykov <khazhy@google.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Ext4 <linux-ext4@vger.kernel.org>
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On Fri, May 21, 2021 at 5:42 AM Gabriel Krisman Bertazi
<krisman@collabora.com> wrote:
>
> According to Amir:
>
> "FS_IN_IGNORED is completely internal to inotify and there is no need
> to set it in i_fsnotify_mask at all, so if we remove the bit from the
> output of inotify_arg_to_mask() no functionality will change and we will
> be able to overload the event bit for FS_ERROR."
>
> This is done in preparation to overload FS_ERROR with the notification
> mechanism in fanotify.
>
> Suggested-by: Amir Goldstein <amir73il@gmail.com>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

Reviewed-by: Amir Goldstein <amir73il@gmail.com>

> ---
>  fs/notify/inotify/inotify_user.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
> index 98f61b31745a..4d17be6dd58d 100644
> --- a/fs/notify/inotify/inotify_user.c
> +++ b/fs/notify/inotify/inotify_user.c
> @@ -89,10 +89,10 @@ static inline __u32 inotify_arg_to_mask(struct inode *inode, u32 arg)
>         __u32 mask;
>
>         /*
> -        * Everything should accept their own ignored and should receive events
> -        * when the inode is unmounted.  All directories care about children.
> +        * Everything should receive events when the inode is unmounted.
> +        * All directories care about children.
>          */
> -       mask = (FS_IN_IGNORED | FS_UNMOUNT);
> +       mask = (FS_UNMOUNT);

Nit: can remove ()

Thanks,
Amir.