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MdeModulePkg Variable: Update GetNextVariableName to follow UEFI 2.7

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"The size must be large enough to fit input string supplied in
VariableName buffer" is added in the description for VariableNameSize.
And two cases of EFI_INVALID_PARAMETER are added.
1. The input values of VariableName and VendorGuid are not a name and
   GUID of an existing variable.
2. Null-terminator is not found in the first VariableNameSize bytes of
   the input VariableName buffer.

This patch is to update code to follow them.

Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Star Zeng
2017-06-22 17:30:39 +08:00
parent 6ca2bfa5e8
commit 6f817f9b8b
5 changed files with 123 additions and 31 deletions
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22
MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c
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@@ -60,14 +60,22 @@ RuntimeServiceGetVariable (
This code Finds the Next available variable.
@param VariableNameSize Size of the variable name
@param VariableName Pointer to variable name
@param VendorGuid Variable Vendor Guid
@param VariableNameSize The size of the VariableName buffer. The size must be large enough to fit input
string supplied in VariableName buffer.
@param VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().
On output, returns the Null-terminated Unicode string of the current variable.
@param VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().
On output, returns the VendorGuid of the current variable.
@return EFI_INVALID_PARAMETER Invalid parameter
@return EFI_SUCCESS Find the specified variable
@return EFI_NOT_FOUND Not found
@return EFI_BUFFER_TO_SMALL DataSize is too small for the result
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_NOT_FOUND The next variable was not found.
@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.
VariableNameSize has been updated with the size needed to complete the request.
@retval EFI_INVALID_PARAMETER VariableNameSize or VariableName or VendorGuid is NULL.
@retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and
GUID of an existing variable.
@retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of
the input VariableName buffer.
**/
EFI_STATUS