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efi_loader: registration key in LocateProtocol()

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In LocateProtocol() implement searching by the registration key returned by
RegisterNotifyProtocol().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-05-29 18:06:46 +02:00
parent b8abd743ff
commit e31b3b1622
1 changed files with 39 additions and 10 deletions
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49
lib/efi_loader/efi_boottime.c
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@ -2259,29 +2259,58 @@ static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol,
void *registration,
void **protocol_interface)
{
struct list_head *lhandle;
struct efi_handler *handler;
efi_status_t ret;
struct efi_object *efiobj;
EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface);
/*
* The UEFI spec explicitly requires a protocol even if a registration
* key is provided. This differs from the logic in LocateHandle().
*/
if (!protocol || !protocol_interface)
return EFI_EXIT(EFI_INVALID_PARAMETER);
list_for_each(lhandle, &efi_obj_list) {
struct efi_object *efiobj;
struct efi_handler *handler;
efiobj = list_entry(lhandle, struct efi_object, link);
if (registration) {
struct efi_register_notify_event *event;
struct efi_protocol_notification *handle;
event = efi_check_register_notify_event(registration);
if (!event)
return EFI_EXIT(EFI_INVALID_PARAMETER);
/*
* The UEFI spec requires to return EFI_NOT_FOUND if no
* protocol instance matches protocol and registration.
* So let's do the same for a mismatch between protocol and
* registration.
*/
if (guidcmp(&event->protocol, protocol))
goto not_found;
if (list_empty(&event->handles))
goto not_found;
handle = list_first_entry(&event->handles,
struct efi_protocol_notification,
link);
efiobj = handle->handle;
list_del(&handle->link);
free(handle);
ret = efi_search_protocol(efiobj, protocol, &handler);
if (ret == EFI_SUCCESS) {
*protocol_interface = handler->protocol_interface;
return EFI_EXIT(EFI_SUCCESS);
if (ret == EFI_SUCCESS)
goto found;
} else {
list_for_each_entry(efiobj, &efi_obj_list, link) {
ret = efi_search_protocol(efiobj, protocol, &handler);
if (ret == EFI_SUCCESS)
goto found;
}
}
not_found:
*protocol_interface = NULL;
return EFI_EXIT(EFI_NOT_FOUND);
found:
*protocol_interface = handler->protocol_interface;
return EFI_EXIT(EFI_SUCCESS);
}
/**