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efi_loader: remove efi_disk_is_system_part()

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The block IO protocol may be installed on any handle. We should make
no assumption about the structure the handle points to.

efi_disk_is_system_part() makes an illegal widening cast from a handle
to a struct efi_disk_obj. Remove the function.

Fixes: Fixes: 41fd506842 ("efi_loader: disk: add efi_disk_is_system_part()")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-03-05 00:36:50 +01:00
parent 90dcd9b2d3
commit b78631d54f
3 changed files with 9 additions and 33 deletions
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2
include/efi_loader.h
View file

@ -541,8 +541,6 @@ efi_status_t tcg2_measure_pe_image(void *efi, u64 efi_size,
int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
const char *if_typename, int diskid,
const char *pdevname);
/* Check if it is EFI system partition */
bool efi_disk_is_system_part(efi_handle_t handle);
/* Called by bootefi to make GOP (graphical) interface available */
efi_status_t efi_gop_register(void);
/* Called by bootefi to make the network interface available */

11
lib/efi_loader/efi_capsule.c
View file

@ -669,22 +669,29 @@ static efi_status_t get_dp_device(u16 *boot_var,
/**
* device_is_present_and_system_part - check if a device exists
* @dp Device path
*
* Check if a device pointed to by the device path, @dp, exists and is
* located in UEFI system partition.
*
* @dp device path
* Return: true - yes, false - no
*/
static bool device_is_present_and_system_part(struct efi_device_path *dp)
{
efi_handle_t handle;
struct efi_device_path *rem;
/* Check device exists */
handle = efi_dp_find_obj(dp, NULL, NULL);
if (!handle)
return false;
return efi_disk_is_system_part(handle);
/* Check device is on system partition */
handle = efi_dp_find_obj(dp, &efi_system_partition_guid, &rem);
if (!handle)
return false;
return true;
}
/**

29
lib/efi_loader/efi_disk.c
View file

@ -587,32 +587,3 @@ efi_status_t efi_disk_register(void)
return EFI_SUCCESS;
}
/**
* efi_disk_is_system_part() - check if handle refers to an EFI system partition
*
* @handle: handle of partition
*
* Return: true if handle refers to an EFI system partition
*/
bool efi_disk_is_system_part(efi_handle_t handle)
{
struct efi_handler *handler;
struct efi_disk_obj *diskobj;
struct disk_partition info;
efi_status_t ret;
int r;
/* check if this is a block device */
ret = efi_search_protocol(handle, &efi_block_io_guid, &handler);
if (ret != EFI_SUCCESS)
return false;
diskobj = container_of(handle, struct efi_disk_obj, header);
r = part_get_info(diskobj->desc, diskobj->part, &info);
if (r)
return false;
return !!(info.bootable & PART_EFI_SYSTEM_PARTITION);
}