linux-kernel - Re: [RFC PATCH] overlayfs: add OVL_IOC_GETINFOFD ioctl that opens ovlinfofd

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Date:   Mon, 5 Oct 2020 20:12:22 +0300
From:   Alexander Mikhalitsyn <alexander.mikhalitsyn@...tuozzo.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     miklos@...redi.hu, Amir Goldstein <amir73il@...il.com>,
        Andrei Vagin <avagin@...il.com>,
        Pavel Tikhomirov <ptikhomirov@...tuozzo.com>,
        David Howells <dhowells@...hat.com>,
        linux-unionfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] overlayfs: add OVL_IOC_GETINFOFD ioctl that opens
 ovlinfofd

On Mon, 5 Oct 2020 10:08:42 -0700
Randy Dunlap <rdunlap@...radead.org> wrote:

> On 10/5/20 10:02 AM, Alexander Mikhalitsyn wrote:
> >  #define	OVL_IOC_GETLWRFHNDLSNUM			_IO('o', 1)
> >  // DISCUSS: what if MAX_HANDLE_SZ will change?
> >  #define	OVL_IOC_GETLWRFHNDL			_IOR('o', 2, struct ovl_mnt_opt_fh)
> >  #define	OVL_IOC_GETUPPRFHNDL			_IOR('o', 3, struct ovl_mnt_opt_fh)
> >  #define	OVL_IOC_GETWRKFHNDL			_IOR('o', 4, struct ovl_mnt_opt_fh)
> > +#define	OVL_IOC_GETINFOFD			_IO('o', 5)
> 
> Hi,
> 
> Quoting (repeating) from
> https://lore.kernel.org/lkml/9cd0e9d1-f124-3f2d-86e6-e6e96a1ccb1e@infradead.org/:
> 
> This needs to have Documentation/userspace-api/ioctl/ioctl-number.rst
> updated also.
> 
> ...
> 
> Are you waiting until it's past RFC stage?
> 
> thanks.
> -- 
> ~Randy
> 

Hi,

thank you! I will prepare this change too when we
decide which ioctls to add. ;)

Regards,
Alex.