EL Fri, 7 Nov 2014 18:02:42 +0100
Miklos Szeredi <miklos@szeredi.hu> escrigué:

> This is the first iteration of the patch, and quite possibly buggy.
> Testing and review is welcome.
> 
Hello,

I did light tests on this patch applied to kernel 3.18-rc3, it works.

Observations:

- option lowerdirs is an extended case of lowerdir,
then we can use only a name for that option and discard the other,
for compatibility with older versions may be lowerdir.

- overlayfs changes fast the mount options that we should specify,
an overlayfs version number will help the implementer to control it.

- limit filesystem depth by a kernel config parameter, allowing nomax.

- print more detailed error message

Following patches are included to better explain some points,
you can use the idea and make your best,

Regards,

Jordi Pujol