Re: [PATCH 06/11] vfs: Prepare tests in &s_idmapped_mounts to be reused inside a userns

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On 3/7/23 17:50, Christian Brauner wrote:
On Tue, Mar 07, 2023 at 12:45:02PM +0100, Rodrigo Campos wrote:
Future patches will call these tests within a userns. So, let's skip
operations not allowed inside a userns.

Signed-off-by: Rodrigo Campos <rodrigo@xxxxxxxxxxx>

On newer kernels you can always do:

mknodat(open_tree_fd, CHRDEV1, S_IFCHR | 0644, makedev(0, 0)))

but you'd still need the t_inside_userns then anyway so sure,

Actually, no, changing the makedev to that does the trick and it works inside a userns (at least in kernels where tmpfs supports idmap mounts).

So I will just do that instead, thanks!

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