Re: [RFC PATCH] fdinfo: Option for public fdinfo

[Christian Brauner]

On Mon, Mar 16, 2026 at 02:38:28PM -0400, David Francis wrote:
> We want some GPU information to be publicly available to all
> processes for basic system-wide profiling (think GPU versions
> of top).
> 
> This information is available in fdinfo and not easily exposed
> by other interfaces.
> 
> Add fd_op flag FOP_PUBLIC_FDINFO, which, if set, makes the fdinfo
> for that file available to read for processes without ptrace
> permissions.
> 
> Note that this makes public how many files each process has open,
> and what their fds are.
> 
> Signed-off-by: David Francis <David.Francis@xxxxxxx>
> ---

Eew, please let's not. Add an ioctl if you need to be able to retrieve
that info.