[U-Boot] [PATCH v6 4/7] cmd: efidebug: add drivers command

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Tue, Feb 19, 2019 at 08:49:30PM +0100, Heinrich Schuchardt wrote:
> On 1/24/19 12:04 PM, AKASHI Takahiro wrote:
> > "drivers" command prints all the uefi drivers on the system.
> > 
> > => efi drivers
> > Driver           Name                 Image Path
> > ================ ==================== ====================
> > 000000007ef003d0 <NULL>               <built-in>
> > 
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> > ---
> >  cmd/efidebug.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 79 insertions(+), 1 deletion(-)
> > 
> > diff --git a/cmd/efidebug.c b/cmd/efidebug.c
> > index 8a7f775b117a..1b788c76a895 100644
> > --- a/cmd/efidebug.c
> > +++ b/cmd/efidebug.c
> > @@ -111,6 +111,80 @@ static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag,
> >  	return CMD_RET_SUCCESS;
> >  }
> >  
> > +static int efi_get_driver_handle_info(efi_handle_t handle, u16 **driver_name,
> > +				      u16 **image_path)
> > +{
> > +	struct efi_handler *handler;
> > +	struct efi_loaded_image *image;
> > +	efi_status_t ret;
> > +
> > +	/*
> > +	 * driver name
> > +	 * TODO: support EFI_COMPONENT_NAME2_PROTOCOL
> > +	 */
> > +	*driver_name = NULL;
> > +
> > +	/* image name */
> > +	ret = efi_search_protocol(handle, &efi_guid_loaded_image, &handler);
> > +	if (ret != EFI_SUCCESS) {
> > +		*image_path = NULL;
> > +		return 0;
> > +	}
> > +
> > +	image = handler->protocol_interface;
> > +	*image_path = efi_dp_str(image->file_path);
> > +
> > +	return 0;
> > +}
> > +
> > +static int do_efi_show_drivers(cmd_tbl_t *cmdtp, int flag,
> > +			       int argc, char * const argv[])
> > +{
> > +	efi_handle_t *handles = NULL, *handle;
> > +	efi_uintn_t size = 0;
> > +	u16 *driver_name, *image_path_text;
> > +	efi_status_t ret;
> > +	int i;
> > +
> 
> You are duplicating the logic of LocateHandleBuffer(). Why?

Will fix.

> > +	ret = BS->locate_handle(BY_PROTOCOL, &efi_guid_driver_binding_protocol,
> > +				NULL, &size, NULL);
> > +	if (ret == EFI_BUFFER_TOO_SMALL) {
> > +		handles = calloc(1, size);
> > +		if (!handles)
> > +			return CMD_RET_FAILURE;
> > +
> > +		ret = BS->locate_handle(BY_PROTOCOL,
> > +					&efi_guid_driver_binding_protocol,
> > +					NULL, &size, handles);
> > +	}
> > +	if (ret != EFI_SUCCESS) {
> > +		free(handles);
> > +		return CMD_RET_FAILURE;
> > +	}
> > +
> > +	printf("Driver%.*s Name                 Image Path\n",
> > +	       EFI_HANDLE_WIDTH - 6, spc);
> > +	printf("%.*s ==================== ====================\n",
> > +	       EFI_HANDLE_WIDTH, sep);
> > +	handle = handles;
> > +	for (i = 0; i < size / sizeof(*handle); i++) {
> > +		if (!efi_get_driver_handle_info(*handle, &driver_name,
> > +						&image_path_text)) {
> > +			if (image_path_text)
> > +				printf("%p %-20ls %ls\n",
> > +				       *handle, driver_name, image_path_text);
> > +			else
> > +				printf("%p %-20ls <built-in>\n",
> > +				       *handle, driver_name);
> > +			efi_free_pool(driver_name);
> > +			efi_free_pool(image_path_text);
> > +		}
> > +		handle++;
> > +	}
> > +
> 
> You are leaking 'handles' here.

Will fix.

Thanks,
-Takahiro Akashi

> Best regards
> 
> Heinrich
> 
> > +	return CMD_RET_SUCCESS;
> > +}
> > +
> >  static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
> >  			   int argc, char * const argv[])
> >  {
> > @@ -504,6 +578,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = {
> >  	U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
> >  	U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
> >  			 "", ""),
> > +	U_BOOT_CMD_MKENT(drivers, CONFIG_SYS_MAXARGS, 1, do_efi_show_drivers,
> > +			 "", ""),
> >  };
> >  
> >  /* Interpreter command to configure UEFI environment */
> > @@ -551,7 +627,9 @@ static char efidebug_help_text[] =
> >  	"  - set/show UEFI boot order\n"
> >  	"\n"
> >  	"efidebug devices\n"
> > -	"  - show uefi devices\n";
> > +	"  - show uefi devices\n"
> > +	"efidebug drivers\n"
> > +	"  - show uefi drivers\n";
> >  #endif
> >  
> >  U_BOOT_CMD(
> > 
>