MdeModulePkg/Bds: Free resources after ram disk boot finishes

The resource free includes to un-register the ram disk device and
free the memory occupied by the ram disk.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Siyuan Fu <siyuan.fu@intel.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>

1 files changed, 150 insertions, 5 deletions

diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
index a582b90598..61a83455f7 100644
--- a/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
+++ b/MdeModulePkg/Library/UefiBootManagerLib/BmBoot.c
@@ -15,6 +15,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 

 #include "InternalBm.h"

 

+EFI_RAM_DISK_PROTOCOL                        *mRamDisk                  = NULL;

+

 EFI_BOOT_MANAGER_REFRESH_LEGACY_BOOT_OPTION  mBmRefreshLegacyBootOption = NULL;

 EFI_BOOT_MANAGER_LEGACY_BOOT                 mBmLegacyBoot              = NULL;

 

@@ -1095,6 +1097,7 @@ BmMatchHttpBootDevicePath (
   @param LoadFileHandle The handle of LoadFile instance.

   @param FullPath       Return the full device path pointing to the load option.

   @param FileSize       Return the size of the load option.

+  @param RamDiskHandle  Return the RAM Disk handle.

 

   @return  The load option buffer.

 **/

@@ -1102,7 +1105,8 @@ VOID *
 BmGetFileBufferFromLoadFileSystem (

   IN  EFI_HANDLE                      LoadFileHandle,

   OUT EFI_DEVICE_PATH_PROTOCOL        **FullPath,

-  OUT UINTN                           *FileSize

+  OUT UINTN                           *FileSize,

+  OUT EFI_HANDLE                      *RamDiskHandle

   )

 {

   EFI_STATUS                      Status;

@@ -1140,7 +1144,13 @@ BmGetFileBufferFromLoadFileSystem (
     FreePool (Handles);

   }

 

-  if (Index != HandleCount) {

+  if (Index == HandleCount) {

+    Handle = NULL;

+  }

+

+  *RamDiskHandle = Handle;

+

+  if (Handle != NULL) {

     return BmExpandMediaDevicePath (DevicePathFromHandle (Handle), FullPath, FileSize);

   } else {

     return NULL;

@@ -1149,6 +1159,114 @@ BmGetFileBufferFromLoadFileSystem (
 

 

 /**

+  Return the RAM Disk device path created by LoadFile.

+

+  @param FilePath  The source file path.

+

+  @return Callee-to-free RAM Disk device path

+**/

+EFI_DEVICE_PATH_PROTOCOL *

+BmGetRamDiskDevicePath (

+  IN EFI_DEVICE_PATH_PROTOCOL *FilePath

+  )

+{

+  EFI_STATUS                  Status;

+  EFI_DEVICE_PATH_PROTOCOL    *RamDiskDevicePath;

+  EFI_DEVICE_PATH_PROTOCOL    *Node;

+  EFI_HANDLE                  Handle;

+

+  Node = FilePath;

+  Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &Node, &Handle);

+  if (!EFI_ERROR (Status) &&

+      (DevicePathType (Node) == MEDIA_DEVICE_PATH) &&

+      (DevicePathSubType (Node) == MEDIA_RAM_DISK_DP)

+      ) {

+

+    //

+    // Construct the device path pointing to RAM Disk

+    //

+    Node = NextDevicePathNode (Node);

+    RamDiskDevicePath = DuplicateDevicePath (FilePath);

+    ASSERT (RamDiskDevicePath != NULL);

+    SetDevicePathEndNode ((VOID *) ((UINTN) RamDiskDevicePath + ((UINTN) Node - (UINTN) FilePath)));

+    return RamDiskDevicePath;

+  }

+

+  return NULL;

+}

+

+/**

+  Return the buffer and buffer size occupied by the RAM Disk.

+

+  @param RamDiskDevicePath  RAM Disk device path.

+  @param RamDiskSizeInPages Return RAM Disk size in pages.

+

+  @retval RAM Disk buffer.

+**/

+VOID *

+BmGetRamDiskMemoryInfo (

+  IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath,

+  OUT UINTN                   *RamDiskSizeInPages

+  )

+{

+

+  EFI_STATUS                  Status;

+  EFI_HANDLE                  Handle;

+  UINT64                      StartingAddr;

+  UINT64                      EndingAddr;

+

+  ASSERT (RamDiskDevicePath != NULL);

+

+  *RamDiskSizeInPages = 0;

+

+  //

+  // Get the buffer occupied by RAM Disk.

+  //

+  Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &RamDiskDevicePath, &Handle);

+  ASSERT_EFI_ERROR (Status);

+  ASSERT ((DevicePathType (RamDiskDevicePath) == MEDIA_DEVICE_PATH) &&

+          (DevicePathSubType (RamDiskDevicePath) == MEDIA_RAM_DISK_DP));

+  StartingAddr = ReadUnaligned64 ((UINT64 *) ((MEDIA_RAM_DISK_DEVICE_PATH *) RamDiskDevicePath)->StartingAddr);

+  EndingAddr   = ReadUnaligned64 ((UINT64 *) ((MEDIA_RAM_DISK_DEVICE_PATH *) RamDiskDevicePath)->EndingAddr);

+  *RamDiskSizeInPages = EFI_SIZE_TO_PAGES ((UINTN) (EndingAddr - StartingAddr + 1));

+  return (VOID *) (UINTN) StartingAddr;

+}

+

+/**

+  Destroy the RAM Disk.

+

+  The destroy operation includes to call RamDisk.Unregister to

+  unregister the RAM DISK from RAM DISK driver, free the memory

+  allocated for the RAM Disk.

+

+  @param RamDiskDevicePath    RAM Disk device path.

+**/

+VOID

+BmDestroyRamDisk (

+  IN EFI_DEVICE_PATH_PROTOCOL *RamDiskDevicePath

+  )

+{

+  EFI_STATUS                  Status;

+  VOID                        *RamDiskBuffer;

+  UINTN                       RamDiskSizeInPages;

+

+  ASSERT (RamDiskDevicePath != NULL);

+

+  RamDiskBuffer = BmGetRamDiskMemoryInfo (RamDiskDevicePath, &RamDiskSizeInPages);

+

+  //

+  // Destroy RAM Disk.

+  //

+  if (mRamDisk == NULL) {

+    Status = gBS->LocateProtocol (&gEfiRamDiskProtocolGuid, NULL, (VOID *) &mRamDisk);

+    ASSERT_EFI_ERROR (Status);

+  }

+  Status = mRamDisk->Unregister (RamDiskDevicePath);

+  ASSERT_EFI_ERROR (Status);

+  FreePages (RamDiskBuffer, RamDiskSizeInPages);

+}

+

+/**

   Get the file buffer from the specified Load File instance.

 

   @param LoadFileHandle The specified Load File instance.

@@ -1160,7 +1278,7 @@ BmGetFileBufferFromLoadFileSystem (
 **/

 VOID *

 BmGetFileBufferFromLoadFile (

-  EFI_HANDLE                          LoadFileHandle,

+  IN  EFI_HANDLE                      LoadFileHandle,

   IN  EFI_DEVICE_PATH_PROTOCOL        *FilePath,

   OUT EFI_DEVICE_PATH_PROTOCOL        **FullPath,

   OUT UINTN                           *FileSize

@@ -1170,6 +1288,7 @@ BmGetFileBufferFromLoadFile (
   EFI_LOAD_FILE_PROTOCOL              *LoadFile;

   VOID                                *FileBuffer;

   BOOLEAN                             LoadFileSystem;

+  EFI_HANDLE                          RamDiskHandle;

   UINTN                               BufferSize;

 

   *FileSize = 0;

@@ -1208,7 +1327,13 @@ BmGetFileBufferFromLoadFile (
   }

 

   if (LoadFileSystem) {

-    FileBuffer = BmGetFileBufferFromLoadFileSystem (LoadFileHandle, FullPath, FileSize);

+    FileBuffer = BmGetFileBufferFromLoadFileSystem (LoadFileHandle, FullPath, FileSize, &RamDiskHandle);

+    if (FileBuffer == NULL) {

+      //

+      // If there is no bootable executable in the populated

+      //

+      BmDestroyRamDisk (DevicePathFromHandle (RamDiskHandle));

+    }

   } else {

     *FileSize = BufferSize;

     *FullPath = DuplicateDevicePath (DevicePathFromHandle (LoadFileHandle));

@@ -1436,6 +1561,7 @@ EfiBootManagerBoot (
   UINTN                     OriginalOptionNumber;

   EFI_DEVICE_PATH_PROTOCOL  *FilePath;

   EFI_DEVICE_PATH_PROTOCOL  *Node;

+  EFI_DEVICE_PATH_PROTOCOL  *RamDiskDevicePath;

   EFI_HANDLE                FvHandle;

   VOID                      *FileBuffer;

   UINTN                     FileSize;

@@ -1516,10 +1642,14 @@ EfiBootManagerBoot (
   //

   // 5. Load EFI boot option to ImageHandle

   //

-  ImageHandle = NULL;

+  ImageHandle       = NULL;

+  RamDiskDevicePath = NULL;

   if (DevicePathType (BootOption->FilePath) != BBS_DEVICE_PATH) {

     Status     = EFI_NOT_FOUND;

     FileBuffer = BmGetLoadOptionBuffer (BootOption->FilePath, &FilePath, &FileSize);

+    if (FileBuffer != NULL) {

+      RamDiskDevicePath = BmGetRamDiskDevicePath (FilePath);

+    }

     DEBUG_CODE (

       if (FileBuffer != NULL && CompareMem (BootOption->FilePath, FilePath, GetDevicePathSize (FilePath)) != 0) {

         DEBUG ((EFI_D_INFO, "[Bds] DevicePath expand: "));

@@ -1556,6 +1686,13 @@ EfiBootManagerBoot (
         (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_EC_BOOT_OPTION_LOAD_ERROR)

         );

       BootOption->Status = Status;

+      //

+      // Destroy the RAM disk

+      //

+      if (RamDiskDevicePath != NULL) {

+        BmDestroyRamDisk (RamDiskDevicePath);

+        FreePool (RamDiskDevicePath);

+      }

       return;

     }

   }

@@ -1652,6 +1789,14 @@ EfiBootManagerBoot (
   PERF_END_EX (gImageHandle, "BdsAttempt", NULL, 0, (UINT32) OptionNumber);

 

   //

+  // Destroy the RAM disk

+  //

+  if (RamDiskDevicePath != NULL) {

+    BmDestroyRamDisk (RamDiskDevicePath);

+    FreePool (RamDiskDevicePath);

+  }

+

+  //

   // Clear the Watchdog Timer after the image returns

   //

   gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);