1 files changed, 118 insertions, 371 deletions

diff --git a/src/interface/efi/efi_autoexec.c b/src/interface/efi/efi_autoexec.c
index fb12cef0..d9ad3b99 100644
--- a/src/interface/efi/efi_autoexec.c
+++ b/src/interface/efi/efi_autoexec.c
@@ -24,16 +24,16 @@
 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 #include <string.h>
-#include <stdlib.h>
 #include <errno.h>
+#include <ipxe/timer.h>
 #include <ipxe/image.h>
-#include <ipxe/init.h>
-#include <ipxe/in.h>
+#include <ipxe/netdevice.h>
 #include <ipxe/efi/efi.h>
+#include <ipxe/efi/efi_utils.h>
 #include <ipxe/efi/efi_autoexec.h>
-#include <ipxe/efi/Protocol/PxeBaseCode.h>
-#include <ipxe/efi/Protocol/SimpleFileSystem.h>
-#include <ipxe/efi/Guid/FileInfo.h>
+#include <ipxe/efi/mnpnet.h>
+#include <usr/imgmgmt.h>
+#include <usr/sync.h>
 
 /** @file
  *
@@ -41,413 +41,160 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  *
  */
 
-/** Autoexec script filename */
-static wchar_t efi_autoexec_wname[] = L"autoexec.ipxe";
+/** Timeout for autoexec script downloads */
+#define EFI_AUTOEXEC_TIMEOUT ( 2 * TICKS_PER_SEC )
 
 /** Autoexec script image name */
-static char efi_autoexec_name[] = "autoexec.ipxe";
-
-/** Autoexec script (if any) */
-static void *efi_autoexec;
-
-/** Autoexec script length */
-static size_t efi_autoexec_len;
+#define EFI_AUTOEXEC_NAME "autoexec.ipxe"
+
+/** An EFI autoexec script loader */
+struct efi_autoexec_loader {
+	/** Required protocol GUID */
+	EFI_GUID *protocol;
+	/**
+	 * Load autoexec script
+	 *
+	 * @v handle		Handle on which protocol was found
+	 * @v image		Image to fill in
+	 * @ret rc		Return status code
+	 */
+	int ( * load ) ( EFI_HANDLE handle, struct image **image );
+};
 
 /**
- * Load autoexec script from path within filesystem
+ * Load autoexec script from filesystem
  *
- * @v device		Device handle
- * @v path		Relative path to image, or NULL to load from root
+ * @v handle		Simple filesystem protocol handle
+ * @v image		Image to fill in
  * @ret rc		Return status code
  */
-static int efi_autoexec_filesystem ( EFI_HANDLE device,
-				     EFI_DEVICE_PATH_PROTOCOL *path ) {
-	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
-	union {
-		void *interface;
-		EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *fs;
-	} u;
-	struct {
-		EFI_FILE_INFO info;
-		CHAR16 name[ sizeof ( efi_autoexec_wname ) /
-			     sizeof ( efi_autoexec_wname[0] ) ];
-	} info;
-	FILEPATH_DEVICE_PATH *filepath;
-	EFI_FILE_PROTOCOL *root;
-	EFI_FILE_PROTOCOL *file;
-	UINTN size;
-	VOID *data;
-	unsigned int dirlen;
-	size_t len;
-	CHAR16 *wname;
-	EFI_STATUS efirc;
+static int efi_autoexec_filesystem ( EFI_HANDLE handle, struct image **image ) {
+	EFI_HANDLE device = efi_loaded_image->DeviceHandle;
 	int rc;
 
-	/* Identify directory */
-	if ( path ) {
-
-		/* Check relative device path is a file path */
-		if ( ! ( ( path->Type == MEDIA_DEVICE_PATH ) &&
-			 ( path->SubType == MEDIA_FILEPATH_DP ) ) ) {
-			DBGC ( device, "EFI %s image path ",
-			       efi_handle_name ( device ) );
-			DBGC ( device, " \"%s\" is not a file path\n",
-			       efi_devpath_text ( path ) );
-			rc = -ENOTTY;
-			goto err_not_filepath;
-		}
-		filepath = container_of ( path, FILEPATH_DEVICE_PATH, Header );
-
-		/* Find length of containing directory */
-		dirlen = ( ( ( ( path->Length[1] << 8 ) | path->Length[0] )
-			     - offsetof ( typeof ( *filepath ), PathName ) )
-			   / sizeof ( filepath->PathName[0] ) );
-		for ( ; dirlen ; dirlen-- ) {
-			if ( filepath->PathName[ dirlen - 1 ] == L'\\' )
-				break;
-		}
-
-	} else {
-
-		/* Use root directory */
-		filepath = NULL;
-		dirlen = 0;
-	}
-
-	/* Allocate filename */
-	len = ( ( dirlen * sizeof ( wname[0] ) ) + sizeof ( efi_autoexec_wname ) );
-	wname = malloc ( len );
-	if ( ! wname ) {
-		rc = -ENOMEM;
-		goto err_wname;
-	}
-	memcpy ( wname, filepath->PathName, ( dirlen * sizeof ( wname[0] ) ) );
-	memcpy ( &wname[dirlen], efi_autoexec_wname, sizeof ( efi_autoexec_wname ) );
-
-	/* 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, wname,
-				    EFI_FILE_MODE_READ, 0 ) ) != 0 ) {
-		rc = -EEFI ( efirc );
-		DBGC ( device, "EFI %s has no %ls: %s\n",
-		       efi_handle_name ( device ), wname, 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 ), wname, 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 ), wname );
-		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 ), wname, 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 ), wname, strerror ( rc ) );
-		goto err_read;
+	/* Check that we were loaded from a filesystem */
+	if ( handle != device ) {
+		DBGC ( device, "EFI %s is not the file system handle\n",
+		       efi_handle_name ( device ) );
+		return -ENOTTY;
 	}
 
-	/* Record autoexec script */
-	efi_autoexec = data;
-	efi_autoexec_len = size;
-	data = NULL;
-	DBGC ( device, "EFI %s found %ls\n", efi_handle_name ( device ), wname );
+	/* Try loading from loaded image directory, if supported */
+	if ( ( rc = imgacquire ( "file:" EFI_AUTOEXEC_NAME,
+				 EFI_AUTOEXEC_TIMEOUT, image ) ) == 0 )
+		return 0;
 
-	/* Success */
-	rc = 0;
+	/* Try loading from root directory, if supported */
+	if ( ( rc = imgacquire ( "file:/" EFI_AUTOEXEC_NAME,
+				 EFI_AUTOEXEC_TIMEOUT, image ) ) == 0 )
+		return 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:
-	free ( wname );
- err_wname:
- err_not_filepath:
 	return rc;
 }
 
 /**
- * Load autoexec script from TFTP server
+ * Load autoexec script via temporary network device
  *
- * @v device		Device handle
+ * @v handle		Managed network protocol service binding handle
+ * @v image		Image to fill in
  * @ret rc		Return status code
  */
-static int efi_autoexec_tftp ( EFI_HANDLE device ) {
-	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
-	union {
-		void *interface;
-		EFI_PXE_BASE_CODE_PROTOCOL *pxe;
-	} u;
-	EFI_PXE_BASE_CODE_MODE *mode;
-	EFI_PXE_BASE_CODE_PACKET *packet;
-	union {
-		struct in_addr in;
-		EFI_IP_ADDRESS ip;
-	} server;
-	size_t filename_max;
-	char *filename;
-	char *sep;
-	UINT64 size;
-	VOID *data;
-	EFI_STATUS efirc;
+static int efi_autoexec_network ( EFI_HANDLE handle, struct image **image ) {
+	EFI_HANDLE device = efi_loaded_image->DeviceHandle;
+	struct net_device *netdev;
 	int rc;
 
-	/* Open PXE base code protocol */
-	if ( ( efirc = bs->OpenProtocol ( device,
-					  &efi_pxe_base_code_protocol_guid,
-					  &u.interface, efi_image_handle,
-					  device,
-					  EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
-		rc = -EEFI ( efirc );
-		DBGC ( device, "EFI %s has no PXE base code instance: %s\n",
+	/* Create temporary network device */
+	if ( ( rc = mnptemp_create ( handle, &netdev ) ) != 0 ) {
+		DBGC ( device, "EFI %s could not create net device: %s\n",
 		       efi_handle_name ( device ), strerror ( rc ) );
-		goto err_pxe;
-	}
-
-	/* Do not attempt to parse DHCPv6 packets */
-	mode = u.pxe->Mode;
-	if ( mode->UsingIpv6 ) {
-		rc = -ENOTSUP;
-		DBGC ( device, "EFI %s has IPv6 PXE base code\n",
-		       efi_handle_name ( device ) );
-		goto err_ipv6;
+		goto err_create;
 	}
 
-	/* Identify relevant reply packet */
-	if ( mode->PxeReplyReceived &&
-	     mode->PxeReply.Dhcpv4.BootpBootFile[0] ) {
-		/* Use boot filename if present in PXE reply */
-		DBGC ( device, "EFI %s using PXE reply filename\n",
-		       efi_handle_name ( device ) );
-		packet = &mode->PxeReply;
-	} else if ( mode->DhcpAckReceived &&
-		    mode->DhcpAck.Dhcpv4.BootpBootFile[0] ) {
-		/* Otherwise, use boot filename if present in DHCPACK */
-		DBGC ( device, "EFI %s using DHCPACK filename\n",
-		       efi_handle_name ( device ) );
-		packet = &mode->DhcpAck;
-	} else if ( mode->ProxyOfferReceived &&
-		    mode->ProxyOffer.Dhcpv4.BootpBootFile[0] ) {
-		/* Otherwise, use boot filename if present in ProxyDHCPOFFER */
-		DBGC ( device, "EFI %s using ProxyDHCPOFFER filename\n",
-		       efi_handle_name ( device ) );
-		packet = &mode->ProxyOffer;
-	} else {
-		/* No boot filename available */
-		rc = -ENOENT;
-		DBGC ( device, "EFI %s has no PXE boot filename\n",
-		       efi_handle_name ( device ) );
-		goto err_packet;
-	}
-
-	/* Allocate filename */
-	filename_max = ( sizeof ( packet->Dhcpv4.BootpBootFile )
-			 + ( sizeof ( efi_autoexec_name ) - 1 /* NUL */ )
-			 + 1 /* NUL */ );
-	filename = zalloc ( filename_max );
-	if ( ! filename ) {
-		rc = -ENOMEM;
-		goto err_filename;
-	}
-
-	/* Extract next-server address and boot filename */
-	memset ( &server, 0, sizeof ( server ) );
-	memcpy ( &server.in, packet->Dhcpv4.BootpSiAddr,
-		 sizeof ( server.in ) );
-	memcpy ( filename, packet->Dhcpv4.BootpBootFile,
-		 sizeof ( packet->Dhcpv4.BootpBootFile ) );
-
-	/* Update filename to autoexec script name */
-	sep = strrchr ( filename, '/' );
-	if ( ! sep )
-		sep = strrchr ( filename, '\\' );
-	if ( ! sep )
-		sep = ( filename - 1 );
-	strcpy ( ( sep + 1 ), efi_autoexec_name );
-
-	/* Get file size */
-	if ( ( efirc = u.pxe->Mtftp ( u.pxe,
-				      EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE,
-				      NULL, FALSE, &size, NULL, &server.ip,
-				      ( ( UINT8 * ) filename ), NULL,
-				      FALSE ) ) != 0 ) {
-		rc = -EEFI ( efirc );
-		DBGC ( device, "EFI %s could not get size of %s:%s: %s\n",
-		       efi_handle_name ( device ), inet_ntoa ( server.in ),
-		       filename, strerror ( rc ) );
-		goto err_size;
-	}
-
-	/* Ignore zero-length files */
-	if ( ! size ) {
-		rc = -EINVAL;
-		DBGC ( device, "EFI %s has zero-length %s:%s\n",
-		       efi_handle_name ( device ), inet_ntoa ( server.in ),
-		       filename );
-		goto err_empty;
-	}
-
-	/* Allocate temporary copy */
-	if ( ( efirc = bs->AllocatePool ( EfiBootServicesData, size,
-					  &data ) ) != 0 ) {
-		rc = -EEFI ( efirc );
-		DBGC ( device, "EFI %s could not allocate %s:%s: %s\n",
-		       efi_handle_name ( device ), inet_ntoa ( server.in ),
-		       filename, strerror ( rc ) );
-		goto err_alloc;
+	/* Open network device */
+	if ( ( rc = netdev_open ( netdev ) ) != 0 ) {
+		DBGC ( device, "EFI %s could not open net device: %s\n",
+		       efi_handle_name ( device ), strerror ( rc ) );
+		goto err_open;
 	}
 
-	/* Download file */
-	if ( ( efirc = u.pxe->Mtftp ( u.pxe, EFI_PXE_BASE_CODE_TFTP_READ_FILE,
-				      data, FALSE, &size, NULL, &server.ip,
-				      ( ( UINT8 * ) filename ), NULL,
-				      FALSE ) ) != 0 ) {
-		rc = -EEFI ( efirc );
-		DBGC ( device, "EFI %s could not download %s:%s: %s\n",
-		       efi_handle_name ( device ), inet_ntoa ( server.in ),
-		       filename, strerror ( rc ) );
-		goto err_download;
+	/* Attempt download */
+	rc = imgacquire ( EFI_AUTOEXEC_NAME, EFI_AUTOEXEC_TIMEOUT, image );
+	if ( rc != 0 ) {
+		DBGC ( device, "EFI %s could not download %s: %s\n",
+		       efi_handle_name ( device ), EFI_AUTOEXEC_NAME,
+		       strerror ( rc ) );
 	}
 
-	/* Record autoexec script */
-	efi_autoexec = data;
-	efi_autoexec_len = size;
-	data = NULL;
-	DBGC ( device, "EFI %s found %s:%s\n", efi_handle_name ( device ),
-	       inet_ntoa ( server.in ), filename );
+	/* Ensure network exchanges have completed */
+	sync ( EFI_AUTOEXEC_TIMEOUT );
 
-	/* Success */
-	rc = 0;
-
- err_download:
-	if ( data )
-		bs->FreePool ( data );
- err_alloc:
- err_empty:
- err_size:
-	free ( filename );
- err_filename:
- err_packet:
- err_ipv6:
-	bs->CloseProtocol ( device, &efi_pxe_base_code_protocol_guid,
-			    efi_image_handle, device );
- err_pxe:
+ err_open:
+	mnptemp_destroy ( netdev );
+ err_create:
 	return rc;
 }
 
+/** Autoexec script loaders */
+static struct efi_autoexec_loader efi_autoexec_loaders[] = {
+	{
+		.protocol = &efi_simple_file_system_protocol_guid,
+		.load = efi_autoexec_filesystem,
+	},
+	{
+		.protocol = &efi_managed_network_service_binding_protocol_guid,
+		.load = efi_autoexec_network,
+	},
+};
+
 /**
  * Load autoexec script
  *
- * @v device		Device handle
- * @v path		Image path within device handle
  * @ret rc		Return status code
  */
-int efi_autoexec_load ( EFI_HANDLE device,
-			EFI_DEVICE_PATH_PROTOCOL *path ) {
-	int rc;
-
-	/* Sanity check */
-	assert ( efi_autoexec == NULL );
-	assert ( efi_autoexec_len == 0 );
-
-	/* Try loading from file system loaded image directory, if supported */
-	if ( ( rc = efi_autoexec_filesystem ( device, path ) ) == 0 )
-		return 0;
-
-	/* Try loading from file system root directory, if supported */
-	if ( ( rc = efi_autoexec_filesystem ( device, NULL ) ) == 0 )
-		return 0;
-
-	/* Try loading via TFTP, if supported */
-	if ( ( rc = efi_autoexec_tftp ( device ) ) == 0 )
-		return 0;
-
-	return -ENOENT;
-}
-
-/**
- * Register autoexec script
- *
- */
-static void efi_autoexec_startup ( void ) {
-	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
+int efi_autoexec_load ( void ) {
 	EFI_HANDLE device = efi_loaded_image->DeviceHandle;
+	EFI_HANDLE handle;
+	struct efi_autoexec_loader *loader;
 	struct image *image;
+	unsigned int i;
+	int rc;
 
-	/* Do nothing if we have no autoexec script */
-	if ( ! efi_autoexec )
-		return;
+	/* Use first applicable loader */
+	for ( i = 0 ; i < ( sizeof ( efi_autoexec_loaders ) /
+			    sizeof ( efi_autoexec_loaders[0] ) ) ; i ++ ) {
+
+		/* Locate required protocol for this loader */
+		loader = &efi_autoexec_loaders[i];
+		if ( ( rc = efi_locate_device ( device, loader->protocol,
+						&handle, 0 ) ) != 0 ) {
+			DBGC ( device, "EFI %s found no %s: %s\n",
+			       efi_handle_name ( device ),
+			       efi_guid_ntoa ( loader->protocol ),
+			       strerror ( rc ) );
+			continue;
+		}
+		DBGC ( device, "EFI %s found %s on ",
+		       efi_handle_name ( device ),
+		       efi_guid_ntoa ( loader->protocol ) );
+		DBGC ( device, "%s\n", efi_handle_name ( handle ) );
+
+		/* Try loading */
+		if ( ( rc = loader->load ( handle, &image ) ) != 0 )
+			return rc;
+
+		/* Discard zero-length images */
+		if ( ! image->len ) {
+			DBGC ( device, "EFI %s discarding zero-length %s\n",
+			       efi_handle_name ( device ), image->name );
+			unregister_image ( image );
+			return -ENOENT;
+		}
 
-	/* Create autoexec image */
-	image = image_memory ( efi_autoexec_name,
-			       virt_to_user ( efi_autoexec ),
-			       efi_autoexec_len );
-	if ( ! image ) {
-		DBGC ( device, "EFI %s could not create %s\n",
-		       efi_handle_name ( device ), efi_autoexec_name );
-		return;
+		DBGC ( device, "EFI %s loaded %s (%zd bytes)\n",
+		       efi_handle_name ( device ), image->name, image->len );
+		return 0;
 	}
-	DBGC ( device, "EFI %s registered %s\n",
-	       efi_handle_name ( device ), efi_autoexec_name );
 
-	/* Free temporary copy */
-	bs->FreePool ( efi_autoexec );
-	efi_autoexec = NULL;
+	return -ENOENT;
 }
-
-/** Autoexec script startup function */
-struct startup_fn efi_autoexec_startup_fn __startup_fn ( STARTUP_NORMAL ) = {
-	.name = "efi_autoexec",
-	.startup = efi_autoexec_startup,
-};