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[efi] Split out autoexec script portions of efi_autoboot.c

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The "autoboot device" and "autoexec script" functionalities in
efi_autoboot.c are unrelated except in that they both need to be
invoked by efiprefix.c before device drivers are loaded.

Split out the autoexec script portions to a separate file to avoid
potential confusion.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2021-02-17 16:57:19 +00:00
parent 057674bb1f
commit e39cd79a00
6 changed files with 234 additions and 190 deletions
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189
src/interface/efi/efi_autoboot.c
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@@ -25,40 +25,24 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <string.h>
#include <errno.h>
#include <ipxe/image.h>
#include <ipxe/init.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_autoboot.h>
#include <ipxe/efi/Protocol/SimpleNetwork.h>
#include <ipxe/efi/Protocol/SimpleFileSystem.h>
#include <ipxe/efi/Guid/FileInfo.h>
#include <usr/autoboot.h>
/** @file
*
* EFI automatic booting
* EFI autoboot device
*
*/
/** Autoexec script filename */
#define AUTOEXEC_FILENAME L"autoexec.ipxe"
/** Autoexec script image name */
#define AUTOEXEC_NAME "autoexec.ipxe"
/** Autoexec script (if any) */
static void *efi_autoexec;
/** Autoexec script length */
static size_t efi_autoexec_len;
/**
* Identify autoboot device
*
* @v device Device handle
* @ret rc Return status code
*/
static int efi_set_autoboot_ll_addr ( EFI_HANDLE device ) {
int efi_set_autoboot_ll_addr ( EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
union {
EFI_SIMPLE_NETWORK_PROTOCOL *snp;
@@ -93,172 +77,3 @@ static int efi_set_autoboot_ll_addr ( EFI_HANDLE device ) {
return 0;
}
/**
* Load autoexec script
*
* @v device Device handle
* @ret rc Return status code
*/
static int efi_load_autoexec ( EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
static wchar_t name[] = AUTOEXEC_FILENAME;
union {
void *interface;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *fs;
} u;
struct {
EFI_FILE_INFO info;
CHAR16 name[ sizeof ( name ) / sizeof ( name[0] ) ];
} info;
EFI_FILE_PROTOCOL *root;
EFI_FILE_PROTOCOL *file;
UINTN size;
VOID *data;
EFI_STATUS efirc;
int rc;
/* Sanity check */
assert ( efi_autoexec == NULL );
assert ( efi_autoexec_len == 0 );
/* Open simple file system protocol */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_simple_file_system_protocol_guid,
&u.interface, efi_image_handle,
device,
EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s has no filesystem instance: %s\n",
efi_handle_name ( device ), strerror ( rc ) );
goto err_filesystem;
}
/* Open root directory */
if ( ( efirc = u.fs->OpenVolume ( u.fs, &root ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s could not open volume: %s\n",
efi_handle_name ( device ), strerror ( rc ) );
goto err_volume;
}
/* Open autoexec script */
if ( ( efirc = root->Open ( root, &file, name,
EFI_FILE_MODE_READ, 0 ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s has no %ls: %s\n",
efi_handle_name ( device ), name, strerror ( rc ) );
goto err_open;
}
/* Get file information */
size = sizeof ( info );
if ( ( efirc = file->GetInfo ( file, &efi_file_info_id, &size,
&info ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s could not get %ls info: %s\n",
efi_handle_name ( device ), name, strerror ( rc ) );
goto err_getinfo;
}
size = info.info.FileSize;
/* Ignore zero-length files */
if ( ! size ) {
rc = -EINVAL;
DBGC ( device, "EFI %s has zero-length %ls\n",
efi_handle_name ( device ), name );
goto err_empty;
}
/* Allocate temporary copy */
if ( ( efirc = bs->AllocatePool ( EfiBootServicesData, size,
&data ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s could not allocate %ls: %s\n",
efi_handle_name ( device ), name, strerror ( rc ) );
goto err_alloc;
}
/* Read file */
if ( ( efirc = file->Read ( file, &size, data ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFI %s could not read %ls: %s\n",
efi_handle_name ( device ), name, strerror ( rc ) );
goto err_read;
}
/* Record autoexec script */
efi_autoexec = data;
efi_autoexec_len = size;
data = NULL;
DBGC ( device, "EFI %s found %ls\n",
efi_handle_name ( device ), name );
/* Success */
rc = 0;
err_read:
if ( data )
bs->FreePool ( data );
err_alloc:
err_empty:
err_getinfo:
file->Close ( file );
err_open:
root->Close ( root );
err_volume:
bs->CloseProtocol ( device, &efi_simple_file_system_protocol_guid,
efi_image_handle, device );
err_filesystem:
return rc;
}
/**
* Configure automatic booting
*
*/
void efi_set_autoboot ( void ) {
EFI_HANDLE device = efi_loaded_image->DeviceHandle;
/* Identify autoboot device, if any */
efi_set_autoboot_ll_addr ( device );
/* Load autoexec script, if any */
efi_load_autoexec ( device );
}
/**
* Register automatic boot image
*
*/
static void efi_autoboot_startup ( void ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE device = efi_loaded_image->DeviceHandle;
const char *name = AUTOEXEC_NAME;
struct image *image;
/* Do nothing if we have no autoexec script */
if ( ! efi_autoexec )
return;
/* Create autoexec image */
image = image_memory ( name, virt_to_user ( efi_autoexec ),
efi_autoexec_len );
if ( ! image ) {
DBGC ( device, "EFI %s could not create %s\n",
efi_handle_name ( device ), name );
return;
}
DBGC ( device, "EFI %s registered %s\n",
efi_handle_name ( device ), name );
/* Free temporary copy */
bs->FreePool ( efi_autoexec );
efi_autoexec = NULL;
}
/** Automatic boot startup function */
struct startup_fn efi_autoboot_startup_fn __startup_fn ( STARTUP_NORMAL ) = {
.name = "efi_autoboot",
.startup = efi_autoboot_startup,
};