linux-kernel - Re: [PATCH] vfio/pci: print vfio-device name to fdinfo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aFnMFHsfi41M2siu@kbusch-mbp>
Date: Mon, 23 Jun 2025 15:50:12 -0600
From: Keith Busch <kbusch@...nel.org>
To: Alex Mastro <amastro@...com>
Cc: Alex Williamson <alex.williamson@...hat.com>, peterx@...hat.com,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: [PATCH] vfio/pci: print vfio-device name to fdinfo

On Mon, Jun 23, 2025 at 02:02:38PM -0700, Alex Mastro wrote:
> Print the PCI device name to a vfio device's fdinfo. This enables tools
> to query which device is associated with a given vfio device fd. It's
> inspired by eventfd's printing of "eventfd-id" (fs/eventfd.c), which
> lsof uses to format the NAME column (e.g. "[eventfd:7278]").
> 
> This results in output like below:
> 
> $ cat /proc/"$process_using_vfio"/fdinfo/"$vfio_device_fd" | grep vfio
> vfio-device-name: 0000:c6:00.0

procfs' fdinfo sounds like the right interface to append this attribute,
so looks looks good to me!

Reviewed-by: Keith Busch <kbusch@...nel.org>