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MdeModulePkg Variable: Return GetVariable() attr if EFI_BUFFER_TOO_SMALL 

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2062

The UEFI specification v2.8 Errata A Section 8.2 "GetVariable()"
"Attributes" parameter description states:

"If not NULL, a pointer to the memory location to return the
 attributes bitmask for the variable. See 'Related Definitions.'
 If not NULL, then Attributes is set on output both when
 EFI_SUCCESS and when EFI_BUFFER_TOO_SMALL is returned."

The attributes were previously only returned from the implementation
in Variable.c on EFI_SUCCESS. They are now returned on EFI_SUCCESS or
EFI_BUFFER_TOO_SMALL according to spec.

Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Guomin Jiang <guomin.jiang@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
This commit is contained in:
Michael Kubacki 2020-03-28 05:55:34 +08:00 committed by mergify[bot]
parent e1fbff3ded
commit edf88807f7
2 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
View File

@ -18,6 +18,8 @@
Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015-2018 Hewlett Packard Enterprise Development LP<BR>
Copyright (c) Microsoft Corporation.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -2379,9 +2381,6 @@ VariableServiceGetVariable (
}
CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr, mVariableModuleGlobal->VariableGlobal.AuthFormat), VarDataSize);
if (Attributes != NULL) {
*Attributes = Variable.CurrPtr->Attributes;
}
*DataSize = VarDataSize;
UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE, &gVariableInfo);
@ -2395,6 +2394,11 @@ VariableServiceGetVariable (
}
Done:
if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {
if (Attributes != NULL && Variable.CurrPtr != NULL) {
*Attributes = Variable.CurrPtr->Attributes;
}
}
ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
return Status;
}

10
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c
View File

@ -14,6 +14,7 @@
InitCommunicateBuffer() is really function to check the variable data size.
Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -642,10 +643,6 @@ FindVariableInRuntimeCache (
}
CopyMem (Data, GetVariableDataPtr (RtPtrTrack.CurrPtr, mVariableAuthFormat), TempDataSize);
if (Attributes != NULL) {
*Attributes = RtPtrTrack.CurrPtr->Attributes;
}
*DataSize = TempDataSize;
UpdateVariableInfo (VariableName, VendorGuid, RtPtrTrack.Volatile, TRUE, FALSE, FALSE, TRUE, &mVariableInfo);
@ -661,6 +658,11 @@ FindVariableInRuntimeCache (
}
Done:
if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {
if (Attributes != NULL && RtPtrTrack.CurrPtr != NULL) {
*Attributes = RtPtrTrack.CurrPtr->Attributes;
}
}
mVariableRuntimeCacheReadLock = FALSE;
return Status;