linux-kernel - Re: [PATCH 1/2] efi: add a function for transferring status to string

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Date:   Thu, 12 Dec 2019 14:24:07 +0000
From:   Joey Lee <JLee@...e.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
CC:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E . Hallyn" <serge@...lyn.com>,
        David Howells <dhowells@...hat.com>,
        Josh Boyer <jwboyer@...oraproject.org>,
        Nayna Jain <nayna@...ux.ibm.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        linux-efi <linux-efi@...r.kernel.org>,
        linux-security-module <linux-security-module@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] efi: add a function for transferring status to string

Hi Ard, 

On Thu, Dec 12, 2019 at 11:20:48AM +0000, Ard Biesheuvel wrote:
> On Thu, 12 Dec 2019 at 10:38, Lee, Chun-Yi <joeyli.kernel@...il.com> wrote:
> >
> > This function can be used to transfer EFI status code to string
> > to improve the readability of debug log.
> >
> > Signed-off-by: "Lee, Chun-Yi" <jlee@...e.com>
> 
> I think I mentioned this the last time you sent this patch: by making
> this a static inline, those strings will be copied into each object
> file that uses this routine.
> Instead, please make it an ordinary function.
> 

Sorry for I just sent a old version patch. I will send a new one.

Thanks a lot!
Joey Lee 

> > ---
> >  include/linux/efi.h | 26 ++++++++++++++++++++++++++
> >  1 file changed, 26 insertions(+)
> >
> > diff --git a/include/linux/efi.h b/include/linux/efi.h
> > index d87acf62958e..08daf4cdd807 100644
> > --- a/include/linux/efi.h
> > +++ b/include/linux/efi.h
> > @@ -42,6 +42,32 @@
> >  #define EFI_ABORTED            (21 | (1UL << (BITS_PER_LONG-1)))
> >  #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
> >
> > +#define EFI_STATUS_STR(_status) \
> > +       case EFI_##_status: \
> > +               return "EFI_" __stringify(_status);
> > +
> > +static inline char *
> > +efi_status_to_str(unsigned long status)
> > +{
> > +       switch (status) {
> > +       EFI_STATUS_STR(SUCCESS)
> > +       EFI_STATUS_STR(LOAD_ERROR)
> > +       EFI_STATUS_STR(INVALID_PARAMETER)
> > +       EFI_STATUS_STR(UNSUPPORTED)
> > +       EFI_STATUS_STR(BAD_BUFFER_SIZE)
> > +       EFI_STATUS_STR(BUFFER_TOO_SMALL)
> > +       EFI_STATUS_STR(NOT_READY)
> > +       EFI_STATUS_STR(DEVICE_ERROR)
> > +       EFI_STATUS_STR(WRITE_PROTECTED)
> > +       EFI_STATUS_STR(OUT_OF_RESOURCES)
> > +       EFI_STATUS_STR(NOT_FOUND)
> > +       EFI_STATUS_STR(ABORTED)
> > +       EFI_STATUS_STR(SECURITY_VIOLATION)
> > +       }
> > +
> > +       return "";
> > +}
> > +
> >  typedef unsigned long efi_status_t;
> >  typedef u8 efi_bool_t;
> >  typedef u16 efi_char16_t;              /* UNICODE character */
> > --
> > 2.16.4
> >