Re: [PATCH] efivarfs: fix abnormal GUID in variable name by using strcpy to replace null with dash

[joeyli <jlee-IBi9RG/b67k@public.gmane.org>]

Hi Matt, 

於 四，2013-03-07 於 13:57 +0000，Matt Fleming 提到：
> On Thu, 2013-03-07 at 11:39 +0000, Matt Fleming wrote:
> > On Thu, 2013-03-07 at 18:34 +0800, joeyli wrote:
> > > The VariableNameSize is not reliable when EFI_SUCCESS is returned
> > > because UEFI 2.3.1 spec only mention VariableNameSize should updated
> > > when EFI_BUFFER_TOO_SMALL is returned. And, the 1024 bytes of buffer is
> > > from old UEFI spec. There doesn't have any size condition of variable
> > > data or variable name in 2.3.1 spec.
> > 
> > The spec may only mention what happens in the EFI_BUFFER_TOO_SMALL case,
> > but for EFI_SUCCESS, any behaviour other than leaving VariableNameSize
> > alone or updating it with the required size of the buffer is just
> > completely insane.
> > 
> > > I modified the patch to grab VariableNameSize when EFI_BUFFER_TOO_SMALL,
> > > the behavior like what we do in efivarfs_file_read().
> > 
> > Thanks, this does seem like the most robust solution.
> 
> Also, you're probably going to need to update
> efivar_update_sysfs_entries() too.
> 

Thanks for your review! I will send out v2 patch after modify and test
on issue machine.


Thanks a lot!
Joey Lee