Add a function to the EFI module that allows setting EFI variables
with specific attributes.
This is useful for marking variables as volatile, for example.
Signed-off-by: Oliver Steffen <ostef...@redhat.com>
Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>
---
grub-core/kern/efi/efi.c | 19 +++++++++++++------
include/grub/efi/efi.h | 6 ++++++
2 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index cf49d6357..03abf5531 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -201,8 +201,8 @@ grub_efi_set_virtual_address_map (grub_efi_uintn_t
memory_map_size,
}
grub_err_t
-grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
- void *data, grub_size_t datasize)
+grub_efi_set_variable_with_attributes (const char *var, const grub_efi_guid_t
*guid,
+ void *data, grub_size_t datasize, grub_efi_uint32_t
attributes)
{
grub_efi_status_t status;
grub_efi_runtime_services_t *r;
@@ -219,10 +219,7 @@ grub_efi_set_variable(const char *var, const
grub_efi_guid_t *guid,
r = grub_efi_system_table->runtime_services;
- status = efi_call_5 (r->set_variable, var16, guid,
- (GRUB_EFI_VARIABLE_NON_VOLATILE
- | GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS
- | GRUB_EFI_VARIABLE_RUNTIME_ACCESS),
+ status = efi_call_5 (r->set_variable, var16, guid, attributes,
datasize, data);
grub_free (var16);
if (status == GRUB_EFI_SUCCESS)
@@ -231,6 +228,16 @@ grub_efi_set_variable(const char *var, const
grub_efi_guid_t *guid,
return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
}
+grub_err_t
+grub_efi_set_variable (const char *var, const grub_efi_guid_t *guid,
+ void *data, grub_size_t datasize)
+{
+ return grub_efi_set_variable_with_attributes (var, guid, data, datasize,
+ GRUB_EFI_VARIABLE_NON_VOLATILE
+ | GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS
+ | GRUB_EFI_VARIABLE_RUNTIME_ACCESS);
+}
+
grub_efi_status_t
grub_efi_get_variable_with_attributes (const char *var,
const grub_efi_guid_t *guid,
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index 444bf5b0b..339989c53 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -98,6 +98,12 @@ grub_efi_status_t EXPORT_FUNC (grub_efi_get_variable) (const
char *variable,
grub_size_t
*datasize_out,
void **data_out);
grub_err_t
+EXPORT_FUNC (grub_efi_set_variable_with_attributes) (const char *var,
+ const grub_efi_guid_t *guid,
+ void *data,
+ grub_size_t datasize,
+ grub_efi_uint32_t attributes);
+grub_err_t
EXPORT_FUNC (grub_efi_set_variable) (const char *var,
const grub_efi_guid_t *guid,
void *data,
--
2.40.1
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