File 0004-efi-Add-a-function-to-read-EFI-variables-with-attrib.patch of Package grub2

From 5f2d71f71bc62c5cffbe27a9ee247803a77dc032 Mon Sep 17 00:00:00 2001
From: Daniel Kiper <daniel.kiper@oracle.com>
Date: Thu, 3 Dec 2020 16:01:47 +0100
Subject: [PATCH 04/46] efi: Add a function to read EFI variables with
 attributes

It will be used to properly detect and report UEFI Secure Boot status to
the x86 Linux kernel. The functionality will be added by subsequent patches.

Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Marco A Benatto <mbenatto@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/kern/efi/efi.c | 16 +++++++++++++---
 include/grub/efi/efi.h   |  5 +++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 9fd136694..92e99b441 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -223,8 +223,11 @@ grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
 }
 
 grub_efi_status_t
-grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
-		       grub_size_t *datasize_out, void **data_out)
+grub_efi_get_variable_with_attributes (const char *var,
+				       const grub_efi_guid_t *guid,
+				       grub_size_t *datasize_out,
+				       void **data_out,
+				       grub_efi_uint32_t *attributes)
 {
   grub_efi_status_t status;
   grub_efi_uintn_t datasize = 0;
@@ -261,7 +264,7 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
       return GRUB_EFI_OUT_OF_RESOURCES;
     }
 
-  status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, data);
+  status = efi_call_5 (r->get_variable, var16, guid, attributes, &datasize, data);
   grub_free (var16);
 
   if (status == GRUB_EFI_SUCCESS)
@@ -303,6 +306,13 @@ grub_efi_secure_boot (void)
   return ret;
 }
 
+grub_efi_status_t
+grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
+		       grub_size_t *datasize_out, void **data_out)
+{
+  return grub_efi_get_variable_with_attributes (var, guid, datasize_out, data_out, NULL);
+}
+
 #pragma GCC diagnostic ignored "-Wcast-align"
 
 /* Search the mods section from the PE32/PE32+ image. This code uses
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index f27d3a365..568d80030 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -77,6 +77,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
 							   grub_efi_uintn_t descriptor_size,
 							   grub_efi_uint32_t descriptor_version,
 							   grub_efi_memory_descriptor_t *virtual_map);
+grub_efi_status_t EXPORT_FUNC (grub_efi_get_variable_with_attributes) (const char *variable,
+								       const grub_efi_guid_t *guid,
+								       grub_size_t *datasize_out,
+								       void **data_out,
+								       grub_efi_uint32_t *attributes);
 grub_efi_status_t EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
 						       const grub_efi_guid_t *guid,
 						       grub_size_t *datasize_out,
-- 
2.26.2
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