Reviewed-by: Jaben Carsey <jaben.car...@intel.com>

> -----Original Message-----
> From: Li, Songpeng
> Sent: Wednesday, January 09, 2019 6:54 PM
> To: edk2-devel@lists.01.org
> Cc: Carsey, Jaben <jaben.car...@intel.com>; Ni, Ray <ray...@intel.com>;
> Wu, Jiaxin <jiaxin...@intel.com>
> Subject: [PATCH v2] ShellPkg/TftpDynamicCommand: Change file writing
> method in tftp
> Importance: High
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1433
> 
> v2: Remove an unused variable.
> 
> Current logic of shell tftp download was writing file after tftp
> download finished, when the file is large, it looks like the shell
> tftp command hanged after download was finished. To improve
> end-user experience, the solution is using split file writing
> instead.
> 
> This patch update the code to open and close file inside
> DownloadFile(), and save each packet to file within callback
> function CheckPacket().
> 
> Since AllocatePage() is no-longer needed, This patch can also
> remove the memory limitation. The download file can be larger
> than system free memory now.
> 
> Cc: Jaben Carsey <jaben.car...@intel.com>
> Cc: Ruiyu Ni <ruiyu...@intel.com>
> Cc: Wu Jiaxin <jiaxin...@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Songpeng Li <songpeng...@intel.com>
> ---
>  ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c | 154 ++++++++-
> -----------
>  1 file changed, 64 insertions(+), 90 deletions(-)
> 
> diff --git a/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
> b/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
> index ed081b5bad7c..ba753a279b00 100644
> --- a/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
> +++ b/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
> @@ -41,6 +41,12 @@ STATIC CONST CHAR16 mTftpProgressFrame[] = L"[
>  // (TFTP_PROGRESS_MESSAGE_SIZE-1) '\b'
>  STATIC CONST CHAR16 mTftpProgressDelete[] =
> L"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\
> b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
> 
> +// Local File Handle
> +SHELL_FILE_HANDLE     mFileHandle;
> +
> +// Path of the local file, Unicode encoded
> +CONST CHAR16         *mLocalFilePath;
> +
>  /**
>    Check and convert the UINT16 option values of the 'tftp' command
> 
> @@ -166,9 +172,6 @@ GetFileSize (
>    @param[in]   FileSize       Size of the file in number of bytes
>    @param[in]   BlockSize      Value of the TFTP blksize option
>    @param[in]   WindowSize     Value of the TFTP window size option
> -  @param[out]  Data           Address where to store the address of the 
> buffer
> -                              where the data of the file were downloaded in
> -                              case of success.
> 
>    @retval  EFI_SUCCESS           The file was downloaded.
>    @retval  EFI_OUT_OF_RESOURCES  A memory allocation failed.
> @@ -184,8 +187,7 @@ DownloadFile (
>    IN   CONST CHAR8          *AsciiFilePath,
>    IN   UINTN                FileSize,
>    IN   UINT16               BlockSize,
> -  IN   UINT16               WindowSize,
> -  OUT  VOID                 **Data
> +  IN   UINT16               WindowSize
>    );
> 
>  /**
> @@ -287,7 +289,6 @@ RunTftp (
>    CHAR8                   *AsciiRemoteFilePath;
>    UINTN                   FilePathSize;
>    CONST CHAR16            *Walker;
> -  CONST CHAR16            *LocalFilePath;
>    EFI_MTFTP4_CONFIG_DATA  Mtftp4ConfigData;
>    EFI_HANDLE              *Handles;
>    UINTN                   HandleCount;
> @@ -297,9 +298,6 @@ RunTftp (
>    EFI_HANDLE              Mtftp4ChildHandle;
>    EFI_MTFTP4_PROTOCOL     *Mtftp4;
>    UINTN                   FileSize;
> -  UINTN                   DataSize;
> -  VOID                    *Data;
> -  SHELL_FILE_HANDLE       FileHandle;
>    UINT16                  BlockSize;
>    UINT16                  WindowSize;
> 
> @@ -309,7 +307,6 @@ RunTftp (
>    AsciiRemoteFilePath = NULL;
>    Handles             = NULL;
>    FileSize            = 0;
> -  DataSize            = 0;
>    BlockSize           = MTFTP_DEFAULT_BLKSIZE;
>    WindowSize          = MTFTP_DEFAULT_WINDOWSIZE;
> 
> @@ -385,7 +382,7 @@ RunTftp (
>    UnicodeStrToAsciiStrS (RemoteFilePath, AsciiRemoteFilePath, FilePathSize);
> 
>    if (ParamCount == 4) {
> -    LocalFilePath = ShellCommandLineGetRawValue (CheckPackage, 3);
> +    mLocalFilePath = ShellCommandLineGetRawValue (CheckPackage, 3);
>    } else {
>      Walker = RemoteFilePath + StrLen (RemoteFilePath);
>      while ((--Walker) >= RemoteFilePath) {
> @@ -394,7 +391,7 @@ RunTftp (
>          break;
>        }
>      }
> -    LocalFilePath = Walker + 1;
> +    mLocalFilePath = Walker + 1;
>    }
> 
>    //
> @@ -492,7 +489,6 @@ RunTftp (
>         (NicNumber < HandleCount) && (ShellStatus != SHELL_SUCCESS);
>         NicNumber++) {
>      ControllerHandle = Handles[NicNumber];
> -    Data = NULL;
> 
>      Status = GetNicName (ControllerHandle, NicNumber, NicName);
>      if (EFI_ERROR (Status)) {
> @@ -543,7 +539,7 @@ RunTftp (
>        goto NextHandle;
>      }
> 
> -    Status = DownloadFile (Mtftp4, RemoteFilePath, AsciiRemoteFilePath,
> FileSize, BlockSize, WindowSize, &Data);
> +    Status = DownloadFile (Mtftp4, RemoteFilePath, AsciiRemoteFilePath,
> FileSize, BlockSize, WindowSize);
>      if (EFI_ERROR (Status)) {
>        ShellPrintHiiEx (
>          -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_DOWNLOAD),
> @@ -552,45 +548,8 @@ RunTftp (
>        goto NextHandle;
>      }
> 
> -    DataSize = FileSize;
> -
> -    if (!EFI_ERROR (ShellFileExists (LocalFilePath))) {
> -      ShellDeleteFileByName (LocalFilePath);
> -    }
> -
> -    Status = ShellOpenFileByName (
> -               LocalFilePath,
> -               &FileHandle,
> -               EFI_FILE_MODE_CREATE |
> -               EFI_FILE_MODE_WRITE  |
> -               EFI_FILE_MODE_READ,
> -               0
> -               );
> -    if (EFI_ERROR (Status)) {
> -      ShellPrintHiiEx (
> -        -1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL),
> -        mTftpHiiHandle, L"tftp", LocalFilePath
> -      );
> -      goto NextHandle;
> -    }
> -
> -    Status = ShellWriteFile (FileHandle, &FileSize, Data);
> -    if (!EFI_ERROR (Status)) {
> -      ShellStatus = SHELL_SUCCESS;
> -    } else {
> -      ShellPrintHiiEx (
> -        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_WRITE),
> -        mTftpHiiHandle, LocalFilePath, Status
> -      );
> -    }
> -    ShellCloseFile (&FileHandle);
> -
>      NextHandle:
> 
> -    if (Data != NULL) {
> -      gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Data,
> EFI_SIZE_TO_PAGES (DataSize));
> -    }
> -
>      CloseProtocolAndDestroyServiceChild (
>        ControllerHandle,
>        &gEfiMtftp4ServiceBindingProtocolGuid,
> @@ -912,9 +871,6 @@ Error :
>    @param[in]   FileSize       Size of the file in number of bytes
>    @param[in]   BlockSize      Value of the TFTP blksize option
>    @param[in]   WindowSize     Value of the TFTP window size option
> -  @param[out]  Data           Address where to store the address of the 
> buffer
> -                              where the data of the file were downloaded in
> -                              case of success.
> 
>    @retval  EFI_SUCCESS           The file was downloaded.
>    @retval  EFI_OUT_OF_RESOURCES  A memory allocation failed.
> @@ -930,13 +886,10 @@ DownloadFile (
>    IN   CONST CHAR8          *AsciiFilePath,
>    IN   UINTN                FileSize,
>    IN   UINT16               BlockSize,
> -  IN   UINT16               WindowSize,
> -  OUT  VOID                 **Data
> +  IN   UINT16               WindowSize
>    )
>  {
>    EFI_STATUS            Status;
> -  EFI_PHYSICAL_ADDRESS  PagesAddress;
> -  VOID                  *Buffer;
>    DOWNLOAD_CONTEXT      *TftpContext;
>    EFI_MTFTP4_TOKEN      Mtftp4Token;
>    UINT8                 BlksizeBuf[10];
> @@ -944,22 +897,6 @@ DownloadFile (
> 
>    ZeroMem (&Mtftp4Token, sizeof (EFI_MTFTP4_TOKEN));
> 
> -  // Downloaded file can be large. BS.AllocatePages() is more faster
> -  // than AllocatePool() and avoid fragmentation.
> -  // The downloaded file could be an EFI application. Marking the
> -  // allocated page as EfiBootServicesCode would allow to execute a
> -  // potential downloaded EFI application.
> -  Status = gBS->AllocatePages (
> -                   AllocateAnyPages,
> -                   EfiBootServicesCode,
> -                   EFI_SIZE_TO_PAGES (FileSize),
> -                   &PagesAddress
> -                   );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  Buffer = (VOID*)(UINTN)PagesAddress;
>    TftpContext = AllocatePool (sizeof (DOWNLOAD_CONTEXT));
>    if (TftpContext == NULL) {
>      Status = EFI_OUT_OF_RESOURCES;
> @@ -970,8 +907,6 @@ DownloadFile (
>    TftpContext->LastReportedNbOfBytes = 0;
> 
>    Mtftp4Token.Filename    = (UINT8*)AsciiFilePath;
> -  Mtftp4Token.BufferSize  = FileSize;
> -  Mtftp4Token.Buffer      = Buffer;
>    Mtftp4Token.CheckPacket = CheckPacket;
>    Mtftp4Token.Context     = (VOID*)TftpContext;
>    Mtftp4Token.OptionCount = 0;
> @@ -1000,14 +935,41 @@ DownloadFile (
>      mTftpHiiHandle, FilePath
>      );
> 
> +  //
> +  // OPEN FILE
> +  //
> +  if (!EFI_ERROR (ShellFileExists (mLocalFilePath))) {
> +    ShellDeleteFileByName (mLocalFilePath);
> +  }
> +
> +  Status = ShellOpenFileByName (
> +              mLocalFilePath,
> +              &mFileHandle,
> +              EFI_FILE_MODE_CREATE |
> +              EFI_FILE_MODE_WRITE  |
> +              EFI_FILE_MODE_READ,
> +              0
> +              );
> +  if (EFI_ERROR (Status)) {
> +    ShellPrintHiiEx (
> +      -1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL),
> +      mTftpHiiHandle, L"tftp", mLocalFilePath
> +    );
> +    goto Error;
> +  }
> +
>    Status = Mtftp4->ReadFile (Mtftp4, &Mtftp4Token);
>    ShellPrintHiiEx (
>      -1, -1, NULL, STRING_TOKEN (STR_GEN_CRLF),
>      mTftpHiiHandle
>      );
> 
> -Error :
> +  //
> +  // CLOSE FILE
> +  //
> +  ShellCloseFile (&mFileHandle);
> 
> +Error :
>    if (TftpContext != NULL) {
>      FreePool (TftpContext);
>    }
> @@ -1016,14 +978,7 @@ Error :
>      FreePool (Mtftp4Token.OptionList);
>    }
> 
> -  if (EFI_ERROR (Status)) {
> -    gBS->FreePages (PagesAddress, EFI_SIZE_TO_PAGES (FileSize));
> -    return Status;
> -  }
> -
> -  *Data = Buffer;
> -
> -  return EFI_SUCCESS;
> +  return Status;
>  }
> 
>  /**
> @@ -1054,6 +1009,7 @@ CheckPacket (
>    UINTN             Index;
>    UINTN             LastStep;
>    UINTN             Step;
> +  UINTN             DownloadLen;
>    EFI_STATUS        Status;
> 
>    if ((NTOHS (Packet->OpCode)) != EFI_MTFTP4_OPCODE_DATA) {
> @@ -1061,17 +1017,35 @@ CheckPacket (
>    }
> 
>    Context = (DOWNLOAD_CONTEXT*)Token->Context;
> -  if (Context->DownloadedNbOfBytes == 0) {
> -    ShellPrintEx (-1, -1, L"%s       0 Kb", mTftpProgressFrame);
> -  }
> 
>    //
>    // The data in the packet are prepended with two UINT16 :
>    // . OpCode = EFI_MTFTP4_OPCODE_DATA
>    // . Block  = the number of this block of data
>    //
> -  Context->DownloadedNbOfBytes += PacketLen - sizeof (Packet->OpCode)
> -                                            - sizeof (Packet->Data.Block);
> +  DownloadLen = (UINTN)PacketLen - sizeof (Packet->OpCode) - sizeof
> (Packet->Data.Block);
> +
> +  ShellSetFilePosition(mFileHandle, Context->DownloadedNbOfBytes);
> +  Status = ShellWriteFile (mFileHandle, &DownloadLen, Packet->Data.Data);
> +  if (EFI_ERROR (Status)) {
> +    if (Context->DownloadedNbOfBytes > 0) {
> +      ShellPrintHiiEx (
> +        -1, -1, NULL, STRING_TOKEN (STR_GEN_CRLF),
> +        mTftpHiiHandle
> +      );
> +    }
> +    ShellPrintHiiEx (
> +      -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_WRITE),
> +      mTftpHiiHandle, mLocalFilePath, Status
> +    );
> +    return Status;
> +  }
> +
> +  if (Context->DownloadedNbOfBytes == 0) {
> +    ShellPrintEx (-1, -1, L"%s       0 Kb", mTftpProgressFrame);
> +  }
> +
> +  Context->DownloadedNbOfBytes += DownloadLen;
>    NbOfKb = Context->DownloadedNbOfBytes / 1024;
> 
>    Progress[0] = L'\0';
> --
> 2.18.0.windows.1

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