Re: [PATCH v6 05/11] nfit/libnvdimm: add set passphrase support for Intel nvdimms

Fri, 03 Aug 2018 09:08:20 -0700 


On 08/03/2018 01:32 AM, David Howells wrote:
> Dave Jiang <[email protected]> wrote:
> 
>> I think I'm a little confused on what to do once I pass in the new key
>> id through update. How do I retrieve the new key in kernel that I added
>> from userspace and not use key_lookup()? request_key() or something
>> else? Wouldn't request_key come up with the old key since it has the
>> same description?
> 
> As I keep saying, you need to use lookup_user_key():
> 
>       key = lookup_user_key(keyid, 0, KEY_NEED_SEARCH);
> 
> You need to add it to linux/key.h and export it.

Thanks! I got confused with key_user_lookup() and got stuck there.
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