Re: [PATCH] Tftp assert fix for openfile failure case

[Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>]

Jaben,

The patch was not accepted last time because as per Leif
"
> > > > > > This shell command was introduced in the heyday of "let's
> > > > > > reimplement U-Boot in the EDK2 tree". Mainly, from my impression,
> it
> > > > > > seems to be used in order that people don't need to learn how boot
> > > > > > managers and device paths work.
> > > > >
> > > > > When you say about complete boot, then this may not be useful.
> > > > >"


So, if we are maintaining tftp command, then i will resend the patch with inclusion of one comment of Leif
"
> > > > > > If the code is to be kept, I think (from a quick glance) that I
> > > > > > would also like to see
> > > > > >   *Data = NULL
> > > > > > in the error path of DownloadFile().
"

Thanks,
Meenakshi 

> -----Original Message-----
> From: Carsey, Jaben [mailto:jaben.carsey@intel.com]
> Sent: Tuesday, February 13, 2018 8:44 PM
> To: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>; Leif Lindholm
> <leif.lindholm@linaro.org>; Ni, Ruiyu <ruiyu.ni@intel.com>
> Cc: ard.biesheuvel@linaro.org; Ye, Ting <ting.ye@intel.com>; edk2-
> devel@lists.01.org; Fu, Siyuan <siyuan.fu@intel.com>; Udit Kumar
> <udit.kumar@nxp.com>
> Subject: RE: [PATCH] Tftp assert fix for openfile failure case
> 
> Meenakshi,
> 
> The TFTP command is outside the UEFI Shell specification, therefore it is
> included as a DynamicCommand, not a command built into the shell itself.
> 
> I a little confused by your last sentence.  Do you want to send a new patch?
> or do you have a branch to pick changes from ?
> 
> -Jaben
> 
> 
> > -----Original Message-----
> > From: Meenakshi Aggarwal [mailto:meenakshi.aggarwal@nxp.com]
> > Sent: Tuesday, February 13, 2018 1:43 AM
> > To: Leif Lindholm <leif.lindholm@linaro.org>; Ni, Ruiyu
> <ruiyu.ni@intel.com>
> > Cc: ard.biesheuvel@linaro.org; Ye, Ting <ting.ye@intel.com>; edk2-
> > devel@lists.01.org; Carsey, Jaben <jaben.carsey@intel.com>; Fu, Siyuan
> > <siyuan.fu@intel.com>; Udit Kumar <udit.kumar@nxp.com>
> > Subject: RE: [PATCH] Tftp assert fix for openfile failure case
> > Importance: High
> >
> > Hi,
> >
> > As per commit 0961002352e9115b72f544dded239ad226efe87b
> >
> > Tftp command will be maintained to extend internal commands and
> >
> > ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
> >
> > Looks like a copy of ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
> >
> > So, below fix is needed in this case as well.
> >
> > Please suggest, so we can send the updated patch [incorporating Leif's
> > comments]
> >
> >
> > Thanks,
> > Meenakshi
> >
> > > -----Original Message-----
> > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > > Udit Kumar
> > > Sent: Thursday, November 09, 2017 10:13 AM
> > > To: Leif Lindholm <leif.lindholm@linaro.org>
> > > Cc: ruiyu.ni@intel.com; ard.biesheuvel@linaro.org; ting.ye@intel.com;
> > edk2-
> > > devel@lists.01.org; jaben.carsey@intel.com; siyuan.fu@intel.com
> > > Subject: Re: [edk2] [PATCH] Tftp assert fix for openfile failure case
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Leif Lindholm [mailto:leif.lindholm@linaro.org]
> > > > Sent: Wednesday, November 08, 2017 8:52 PM
> > > > To: Udit Kumar <udit.kumar@nxp.com>
> > > > Cc: Vabhav Sharma <vabhav.sharma@nxp.com>; edk2-
> > devel@lists.01.org;
> > > > ruiyu.ni@intel.com; jaben.carsey@intel.com;
> ard.biesheuvel@linaro.org;
> > > > siyuan.fu@intel.com; ting.ye@intel.com
> > > > Subject: Re: [PATCH] Tftp assert fix for openfile failure case
> > > >
> > > > On Wed, Nov 08, 2017 at 05:15:49AM +0000, Udit Kumar wrote:
> > > > > > > diff --git a/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
> > > > > > > b/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
> > > > > > > index fbde3bf..6425fc5 100755
> > > > > > > --- a/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
> > > > > > > +++ b/ShellPkg/Library/UefiShellTftpCommandLib/Tftp.c
> > > > > > > @@ -509,6 +509,7 @@ ShellCommandRunTftp (
> > > > > > >        );
> > > > > > >        goto NextHandle;
> > > > > >
> > > > > > Wow, a goto in a foor loop in a 320-line function.
> > > > > > What could possibly go wrong?
> > > > >
> > > > > Instead of being on some volume, if you are on Shell.
> > > > > Then file open will fail.
> > > >
> > > > Sure. The above was a snarky comment on the state of the existing
> code.
> > > >
> > > > > > >      }
> > > > > > > +    DataSize = FileSize;
> > > > > > >
> > > > > > >      Status = DownloadFile (Mtftp4, RemoteFilePath,
> > > > > > > AsciiRemoteFilePath,
> > > > > > FileSize, BlockSize, &Data);
> > > > > > >      if (EFI_ERROR (Status)) {
> > > > > > > @@ -539,7 +540,6 @@ ShellCommandRunTftp (
> > > > > > >        goto NextHandle;
> > > > > > >      }
> > > > > > >
> > > > > > > -    DataSize = FileSize;
> > > > > > >      Status = ShellWriteFile (FileHandle, &FileSize, Data);
> > > > > > >      if (!EFI_ERROR (Status)) {
> > > > > > >        ShellStatus = SHELL_SUCCESS;
> > > > > > > --
> > > > > > > 1.9.1
> > > > > >
> > > > > > So, a wider question:
> > > > > > This shell command was introduced in the heyday of "let's
> > > > > > reimplement U-Boot in the EDK2 tree". Mainly, from my impression,
> it
> > > > > > seems to be used in order that people don't need to learn how boot
> > > > > > managers and device paths work.
> > > > >
> > > > > When you say about complete boot, then this may not be useful.
> > > > >
> > > > > > Am I being too harsh?
> > > > > > Are there practical uses for this?
> > > > >
> > > > > For doing some sort of unit testing of given interface. I found this
> > > > > useful. During development, this is useful to transfer generic file to
> > > > > development board.
> > > >
> > > > OK, I can see how it could be useful.
> > > > My opposition is based on three things:
> > > > 1) people _are_ trying to use it for boot
> > >
> > > I agree with this, please see my previous comments,
> > > ' When you say about complete boot, then this may not be useful.'
> > >
> > > > 2) not a command described by UEFI Shell spec, but I keep seeing
> > > >    platforms including it even in RELEASE builds (most likely because 1)
> > > > 3) code quality/maintainability
> > >
> > > > > > If the code is to be kept, I think (from a quick glance) that I
> > > > > > would also like to see
> > > > > >   *Data = NULL
> > > > > > in the error path of DownloadFile().
> > > >
> > > > OK, so we don't need to drop it right now, but what's your take on this
> > > > comment?
> > >
> > > I am fine, if you prefer to remove this then we will develop some test
> > > application
> > > for unit tests.
> > > In case, we need to maintain this piece of code then above needs to fix
> as
> > > well.
> > >
> > >
> > > > /
> > > >     Leif
> > > _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel@lists.01.org
> > >
> >
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> > >
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