On Sat, Aug 24, 2024 at 09:27:24AM GMT, Hongbo Li wrote:
> We enable idmapped mounts for bcachefs. Here, we just pass down
> the user_namespace argument from the VFS methods to the relevant

Fwiw, you're not passing a user namespace, you're passing an idmapping.

> helpers.
> 
> The idmap test in bcachefs is as following:

I saw that you tested this with xfstests because that has all the
important testing. Below is just really a "ok, that _looks_ like what
we'd expect" kind of test.

> 
> ```
> 1. losetup /dev/loop1 bcachefs.img
> 2. ./bcachefs format /dev/loop1
> 3. mount -t bcachefs /dev/loop1 /mnt/bcachefs/
> 4. ./mount-idmapped --map-mount b:0:1000:1 /mnt/bcachefs /mnt/idmapped1/
> 
> ll /mnt/bcachefs
> total 2
> drwx------. 2 root root    0 Jun 14 14:10 lost+found
> -rw-r--r--. 1 root root 1945 Jun 14 14:12 profile
> 
> ll /mnt/idmapped1/
> 
> total 2
> drwx------. 2 1000 1000    0 Jun 14 14:10 lost+found
> -rw-r--r--. 1 1000 1000 1945 Jun 14 14:12 profile
> 
> Signed-off-by: Hongbo Li <[email protected]>
> 
> ---

Seems good to me,
Reviewed-by: Christian Brauner <[email protected]>

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