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f30d41230d
Normally only useful for our HttpBootDxe, which supports HTTP boot from static IP address as long as URI is also pre-specified. The NVRAM setting should affect normal EDK II derived network stacks and will configure a static IP on the card, but this will later be ignored and overridden by DHCP when PXE or HTTP boot is started in the standard network stack. Signed-off-by: Mike Beaton <mjsbeaton@gmail.com>
612 lines
17 KiB
C
612 lines
17 KiB
C
/** @file
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Library functions which relate to booting.
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Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
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Copyright (c) 2011 - 2021, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2015-2021 Hewlett Packard Enterprise Development LP<BR>
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Copyright (C) 2024, Mike Beaton. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "NetworkBootInternal.h"
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EFI_RAM_DISK_PROTOCOL *mRamDisk = NULL;
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/**
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Expand the media device path which points to a BlockIo or SimpleFileSystem instance
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by appending EFI_REMOVABLE_MEDIA_FILE_NAME.
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@param DevicePath The media device path pointing to a BlockIo or SimpleFileSystem instance.
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@param FullPath The full path returned by the routine in last call.
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Set to NULL in first call.
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@return The next possible full path pointing to the load option.
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Caller is responsible to free the memory.
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**/
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STATIC
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EFI_DEVICE_PATH_PROTOCOL *
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BmExpandMediaDevicePath (
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
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IN EFI_DEVICE_PATH_PROTOCOL *FullPath
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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EFI_BLOCK_IO_PROTOCOL *BlockIo;
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VOID *Buffer;
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EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;
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EFI_DEVICE_PATH_PROTOCOL *NextFullPath;
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UINTN Size;
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UINTN TempSize;
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EFI_HANDLE *SimpleFileSystemHandles;
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UINTN NumberSimpleFileSystemHandles;
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UINTN Index;
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BOOLEAN GetNext;
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GetNext = (BOOLEAN)(FullPath == NULL);
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//
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// Check whether the device is connected
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//
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TempDevicePath = DevicePath;
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Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &TempDevicePath, &Handle);
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if (!EFI_ERROR (Status)) {
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ASSERT (IsDevicePathEnd (TempDevicePath));
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NextFullPath = FileDevicePath (Handle, EFI_REMOVABLE_MEDIA_FILE_NAME);
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//
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// For device path pointing to simple file system, it only expands to one full path.
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//
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if (GetNext) {
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return NextFullPath;
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} else {
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FreePool (NextFullPath);
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return NULL;
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}
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}
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Status = gBS->LocateDevicePath (&gEfiBlockIoProtocolGuid, &TempDevicePath, &Handle);
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ASSERT_EFI_ERROR (Status);
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//
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// For device boot option only pointing to the removable device handle,
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// should make sure all its children handles (its child partion or media handles)
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// are created and connected.
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//
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gBS->ConnectController (Handle, NULL, NULL, TRUE);
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//
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// Issue a dummy read to the device to check for media change.
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// When the removable media is changed, any Block IO read/write will
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// cause the BlockIo protocol be reinstalled and EFI_MEDIA_CHANGED is
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// returned. After the Block IO protocol is reinstalled, subsequent
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// Block IO read/write will success.
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//
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Status = gBS->HandleProtocol (Handle, &gEfiBlockIoProtocolGuid, (VOID **)&BlockIo);
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ASSERT_EFI_ERROR (Status);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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Buffer = AllocatePool (BlockIo->Media->BlockSize);
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if (Buffer != NULL) {
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BlockIo->ReadBlocks (
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BlockIo,
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BlockIo->Media->MediaId,
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0,
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BlockIo->Media->BlockSize,
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Buffer
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);
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FreePool (Buffer);
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}
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//
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// Detect the the default boot file from removable Media
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//
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NextFullPath = NULL;
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Size = GetDevicePathSize (DevicePath) - END_DEVICE_PATH_LENGTH;
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gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiSimpleFileSystemProtocolGuid,
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NULL,
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&NumberSimpleFileSystemHandles,
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&SimpleFileSystemHandles
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);
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for (Index = 0; Index < NumberSimpleFileSystemHandles; Index++) {
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//
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// Get the device path size of SimpleFileSystem handle
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//
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TempDevicePath = DevicePathFromHandle (SimpleFileSystemHandles[Index]);
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TempSize = GetDevicePathSize (TempDevicePath) - END_DEVICE_PATH_LENGTH;
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//
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// Check whether the device path of boot option is part of the SimpleFileSystem handle's device path
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//
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if ((Size <= TempSize) && (CompareMem (TempDevicePath, DevicePath, Size) == 0)) {
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NextFullPath = FileDevicePath (SimpleFileSystemHandles[Index], EFI_REMOVABLE_MEDIA_FILE_NAME);
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if (GetNext) {
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break;
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} else {
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GetNext = (BOOLEAN)(CompareMem (NextFullPath, FullPath, GetDevicePathSize (NextFullPath)) == 0);
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FreePool (NextFullPath);
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NextFullPath = NULL;
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}
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}
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}
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if (SimpleFileSystemHandles != NULL) {
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FreePool (SimpleFileSystemHandles);
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}
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return NextFullPath;
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}
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/**
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Check whether Left and Right are the same without matching the specific
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device path data in IP device path and URI device path node.
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@retval TRUE Left and Right are the same.
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@retval FALSE Left and Right are the different.
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**/
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STATIC
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BOOLEAN
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BmMatchHttpBootDevicePath (
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IN EFI_DEVICE_PATH_PROTOCOL *Left,
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IN EFI_DEVICE_PATH_PROTOCOL *Right
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)
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{
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for ( ; !IsDevicePathEnd (Left) && !IsDevicePathEnd (Right)
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; Left = NextDevicePathNode (Left), Right = NextDevicePathNode (Right)
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)
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{
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if (CompareMem (Left, Right, DevicePathNodeLength (Left)) != 0) {
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if ((DevicePathType (Left) != MESSAGING_DEVICE_PATH) || (DevicePathType (Right) != MESSAGING_DEVICE_PATH)) {
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return FALSE;
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}
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if (DevicePathSubType (Left) == MSG_DNS_DP) {
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Left = NextDevicePathNode (Left);
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}
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if (DevicePathSubType (Right) == MSG_DNS_DP) {
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Right = NextDevicePathNode (Right);
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}
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if (((DevicePathSubType (Left) != MSG_IPv4_DP) || (DevicePathSubType (Right) != MSG_IPv4_DP)) &&
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((DevicePathSubType (Left) != MSG_IPv6_DP) || (DevicePathSubType (Right) != MSG_IPv6_DP)) &&
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((DevicePathSubType (Left) != MSG_URI_DP) || (DevicePathSubType (Right) != MSG_URI_DP))
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)
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{
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return FALSE;
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}
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}
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}
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return (BOOLEAN)(IsDevicePathEnd (Left) && IsDevicePathEnd (Right));
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}
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/**
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Get the file buffer from the file system produced by Load File instance.
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@param LoadFileHandle The handle of LoadFile instance.
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@param RamDiskHandle Return the RAM Disk handle.
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@return The next possible full path pointing to the load option.
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Caller is responsible to free the memory.
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**/
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STATIC
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EFI_DEVICE_PATH_PROTOCOL *
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BmExpandNetworkFileSystem (
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IN EFI_HANDLE LoadFileHandle,
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OUT EFI_HANDLE *RamDiskHandle
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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EFI_HANDLE *Handles;
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UINTN HandleCount;
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UINTN Index;
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EFI_DEVICE_PATH_PROTOCOL *Node;
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiBlockIoProtocolGuid,
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NULL,
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&HandleCount,
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&Handles
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);
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if (EFI_ERROR (Status)) {
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Handles = NULL;
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HandleCount = 0;
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}
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Handle = NULL;
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for (Index = 0; Index < HandleCount; Index++) {
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Node = DevicePathFromHandle (Handles[Index]);
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Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
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if (!EFI_ERROR (Status) &&
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(Handle == LoadFileHandle) &&
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(DevicePathType (Node) == MEDIA_DEVICE_PATH) && (DevicePathSubType (Node) == MEDIA_RAM_DISK_DP))
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{
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//
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// Find the BlockIo instance populated from the LoadFile.
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//
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Handle = Handles[Index];
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break;
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}
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}
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if (Handles != NULL) {
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FreePool (Handles);
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}
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if (Index == HandleCount) {
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Handle = NULL;
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}
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*RamDiskHandle = Handle;
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if (Handle != NULL) {
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//
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// Re-use BmExpandMediaDevicePath() to get the full device path of load option.
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// But assume only one SimpleFileSystem can be found under the BlockIo.
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//
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return BmExpandMediaDevicePath (DevicePathFromHandle (Handle), NULL);
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} else {
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return NULL;
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}
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}
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/**
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Return the RAM Disk device path created by LoadFile.
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@param FilePath The source file path.
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@return Callee-to-free RAM Disk device path
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**/
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EFI_DEVICE_PATH_PROTOCOL *
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BmGetRamDiskDevicePath (
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IN EFI_DEVICE_PATH_PROTOCOL *FilePath
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)
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{
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EFI_STATUS Status;
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EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath;
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EFI_DEVICE_PATH_PROTOCOL *Node;
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EFI_HANDLE Handle;
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Node = FilePath;
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Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
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if (!EFI_ERROR (Status) &&
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(DevicePathType (Node) == MEDIA_DEVICE_PATH) &&
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(DevicePathSubType (Node) == MEDIA_RAM_DISK_DP)
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)
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{
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//
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// Construct the device path pointing to RAM Disk
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//
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Node = NextDevicePathNode (Node);
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RamDiskDevicePath = DuplicateDevicePath (FilePath);
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ASSERT (RamDiskDevicePath != NULL);
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SetDevicePathEndNode ((VOID *)((UINTN)RamDiskDevicePath + ((UINTN)Node - (UINTN)FilePath)));
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return RamDiskDevicePath;
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}
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return NULL;
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}
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/**
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Return the buffer and buffer size occupied by the RAM Disk.
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@param RamDiskDevicePath RAM Disk device path.
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@param RamDiskSizeInPages Return RAM Disk size in pages.
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@retval RAM Disk buffer.
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**/
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STATIC
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VOID *
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BmGetRamDiskMemoryInfo (
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IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath,
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OUT UINTN *RamDiskSizeInPages
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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UINT64 StartingAddr;
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UINT64 EndingAddr;
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ASSERT (RamDiskDevicePath != NULL);
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*RamDiskSizeInPages = 0;
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//
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// Get the buffer occupied by RAM Disk.
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//
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Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &RamDiskDevicePath, &Handle);
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ASSERT_EFI_ERROR (Status);
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ASSERT (
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(DevicePathType (RamDiskDevicePath) == MEDIA_DEVICE_PATH) &&
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(DevicePathSubType (RamDiskDevicePath) == MEDIA_RAM_DISK_DP)
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);
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StartingAddr = ReadUnaligned64 ((UINT64 *)((MEDIA_RAM_DISK_DEVICE_PATH *)RamDiskDevicePath)->StartingAddr);
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EndingAddr = ReadUnaligned64 ((UINT64 *)((MEDIA_RAM_DISK_DEVICE_PATH *)RamDiskDevicePath)->EndingAddr);
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*RamDiskSizeInPages = EFI_SIZE_TO_PAGES ((UINTN)(EndingAddr - StartingAddr + 1));
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return (VOID *)(UINTN)StartingAddr;
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}
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/**
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Destroy the RAM Disk.
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The destroy operation includes to call RamDisk.Unregister to
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unregister the RAM DISK from RAM DISK driver, free the memory
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allocated for the RAM Disk.
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@param RamDiskDevicePath RAM Disk device path.
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**/
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VOID
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BmDestroyRamDisk (
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IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath
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)
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{
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EFI_STATUS Status;
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VOID *RamDiskBuffer;
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UINTN RamDiskSizeInPages;
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ASSERT (RamDiskDevicePath != NULL);
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RamDiskBuffer = BmGetRamDiskMemoryInfo (RamDiskDevicePath, &RamDiskSizeInPages);
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//
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// Destroy RAM Disk.
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//
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if (mRamDisk == NULL) {
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Status = gBS->LocateProtocol (&gEfiRamDiskProtocolGuid, NULL, (VOID *)&mRamDisk);
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ASSERT_EFI_ERROR (Status);
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}
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Status = mRamDisk->Unregister (RamDiskDevicePath);
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ASSERT_EFI_ERROR (Status);
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FreePages (RamDiskBuffer, RamDiskSizeInPages);
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}
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/**
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Get the file buffer from the specified Load File instance.
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@param LoadFileHandle The specified Load File instance.
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@param FilePath The file path which will pass to LoadFile().
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@return The full device path pointing to the load option buffer.
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**/
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STATIC
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EFI_DEVICE_PATH_PROTOCOL *
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BmExpandLoadFile (
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IN EFI_HANDLE LoadFileHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
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OUT VOID **Data,
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OUT UINT32 *DataSize
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)
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{
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EFI_STATUS Status;
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EFI_LOAD_FILE_PROTOCOL *LoadFile;
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VOID *FileBuffer;
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EFI_HANDLE RamDiskHandle;
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UINTN BufferSize;
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EFI_DEVICE_PATH_PROTOCOL *FullPath;
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ASSERT (Data != NULL);
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ASSERT (DataSize != NULL);
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*Data = NULL;
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*DataSize = 0;
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Status = gBS->OpenProtocol (
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LoadFileHandle,
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&gEfiLoadFileProtocolGuid,
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(VOID **)&LoadFile,
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gImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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ASSERT_EFI_ERROR (Status);
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FileBuffer = NULL;
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BufferSize = 0;
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Status = LoadFile->LoadFile (LoadFile, FilePath, TRUE, &BufferSize, FileBuffer);
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if ((Status != EFI_WARN_FILE_SYSTEM) && (Status != EFI_BUFFER_TOO_SMALL)) {
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return NULL;
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}
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//
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// In call tree of original BmGetLoadOptionBuffer, handling this case
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// is deferred to subsequent call to GetFileBufferByFilePath.
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//
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if (Status == EFI_BUFFER_TOO_SMALL) {
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//
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// Limited to UINT32 by DataSize in OC_CUSTOM_READ, which is limited
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// by Size in OcGetFileSize.
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//
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if (BufferSize > MAX_UINT32) {
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return NULL;
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}
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FileBuffer = AllocatePool (BufferSize);
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if (FileBuffer == NULL) {
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return NULL;
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}
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//
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// Call LoadFile with the correct buffer size.
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//
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FullPath = DevicePathFromHandle (LoadFileHandle);
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Status = LoadFile->LoadFile (LoadFile, FilePath, TRUE, &BufferSize, FileBuffer);
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if (EFI_ERROR (Status)) {
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FreePool (FileBuffer);
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return NULL;
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}
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*DataSize = (UINT32)BufferSize;
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*Data = FileBuffer;
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return DuplicateDevicePath (FullPath);
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}
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//
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// The load option resides in a RAM disk.
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//
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FileBuffer = AllocateReservedPages (EFI_SIZE_TO_PAGES (BufferSize));
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if (FileBuffer == NULL) {
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DEBUG_CODE_BEGIN ();
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EFI_DEVICE_PATH *LoadFilePath;
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CHAR16 *LoadFileText;
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CHAR16 *FileText;
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LoadFilePath = DevicePathFromHandle (LoadFileHandle);
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if (LoadFilePath == NULL) {
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LoadFileText = NULL;
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} else {
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LoadFileText = ConvertDevicePathToText (LoadFilePath, FALSE, FALSE);
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}
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FileText = ConvertDevicePathToText (FilePath, FALSE, FALSE);
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DEBUG ((
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DEBUG_ERROR,
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"%a:%a: failed to allocate reserved pages: "
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"BufferSize=%Lu LoadFile=\"%s\" FilePath=\"%s\"\n",
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gEfiCallerBaseName,
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__func__,
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(UINT64)BufferSize,
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LoadFileText,
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FileText
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));
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if (FileText != NULL) {
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FreePool (FileText);
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}
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if (LoadFileText != NULL) {
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FreePool (LoadFileText);
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}
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DEBUG_CODE_END ();
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return NULL;
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}
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Status = LoadFile->LoadFile (LoadFile, FilePath, TRUE, &BufferSize, FileBuffer);
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if (EFI_ERROR (Status)) {
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FreePages (FileBuffer, EFI_SIZE_TO_PAGES (BufferSize));
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return NULL;
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}
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FullPath = BmExpandNetworkFileSystem (LoadFileHandle, &RamDiskHandle);
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if (FullPath == NULL) {
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//
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// Free the memory occupied by the RAM disk if there is no BlockIo or SimpleFileSystem instance.
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//
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BmDestroyRamDisk (DevicePathFromHandle (RamDiskHandle));
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}
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return FullPath;
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}
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/**
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Return the full device path pointing to the load option.
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FilePath may:
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1. Exactly matches to a LoadFile instance.
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2. Cannot match to any LoadFile instance. Wide match is required.
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In either case, the routine may return:
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1. A copy of FilePath when FilePath matches to a LoadFile instance and
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the LoadFile returns a load option buffer.
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2. A new device path with IP and URI information updated when wide match
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happens.
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3. A new device path pointing to a load option in RAM disk.
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In either case, only one full device path is returned for a specified
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FilePath.
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@param FilePath The media device path pointing to a LoadFile instance.
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@return The load option buffer.
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**/
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EFI_DEVICE_PATH_PROTOCOL *
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BmExpandLoadFiles (
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IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
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OUT VOID **Data,
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OUT UINT32 *DataSize,
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IN BOOLEAN ValidateHttp
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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EFI_HANDLE *Handles;
|
|
UINTN HandleCount;
|
|
UINTN Index;
|
|
EFI_DEVICE_PATH_PROTOCOL *Node;
|
|
EFI_EVENT NotifyEvent;
|
|
|
|
//
|
|
// Get file buffer from load file instance.
|
|
//
|
|
Node = FilePath;
|
|
Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);
|
|
if (!EFI_ERROR (Status) && IsDevicePathEnd (Node)) {
|
|
//
|
|
// When wide match happens, pass full device path to LoadFile (),
|
|
// otherwise, pass remaining device path to LoadFile ().
|
|
//
|
|
FilePath = Node;
|
|
} else {
|
|
Handle = NULL;
|
|
//
|
|
// Use wide match algorithm to find one when
|
|
// cannot find a LoadFile instance to exactly match the FilePath
|
|
//
|
|
Status = gBS->LocateHandleBuffer (
|
|
ByProtocol,
|
|
&gEfiLoadFileProtocolGuid,
|
|
NULL,
|
|
&HandleCount,
|
|
&Handles
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
Handles = NULL;
|
|
HandleCount = 0;
|
|
}
|
|
|
|
for (Index = 0; Index < HandleCount; Index++) {
|
|
if (BmMatchHttpBootDevicePath (DevicePathFromHandle (Handles[Index]), FilePath)) {
|
|
Handle = Handles[Index];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Handles != NULL) {
|
|
FreePool (Handles);
|
|
}
|
|
}
|
|
|
|
if (Handle == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (ValidateHttp) {
|
|
NotifyEvent = MonitorHttpBootCallback (Handle);
|
|
if (NotifyEvent == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
Node = BmExpandLoadFile (Handle, FilePath, Data, DataSize);
|
|
|
|
if (ValidateHttp) {
|
|
gBS->CloseEvent (NotifyEvent);
|
|
|
|
if ((Node != NULL) && !UriWasValidated ()) {
|
|
Print (L"\n"); ///< Sort out cramped spacing
|
|
DEBUG ((DEBUG_ERROR, "NETB: LoadFile returned value but URI was never validated\n"));
|
|
FreePool (Node);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return Node;
|
|
}
|