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judge recovery mode at ReadOnlyVariable2Ppi interface. if yes, then return EFI_NOT_FOUND

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11397 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
erictian 2011-03-14 09:57:55 +00:00
parent 357237bfda
commit 4249fa760f
3 changed files with 46 additions and 186 deletions
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154
MdeModulePkg/Universal/Variable/Pei/Variable.c
View File

@ -32,20 +32,35 @@ EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {
&mVariablePpi &mVariablePpi
}; };
EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariablePpiRecovery = {
PeiGetVariableRecovery,
PeiGetNextVariableNameRecovery
};
EFI_PEI_PPI_DESCRIPTOR mPpiListVariableRecovery = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiReadOnlyVariable2PpiGuid,
&mVariablePpiRecovery
};
EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID; EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID;
/**
Check if it runs in Recovery mode.
@param PeiServices General purpose services available to every PEIM.
@retval TRUE It's in Recovery mode.
@retval FALSE It's not in Recovery mode.
**/
BOOLEAN
IsInRecoveryMode (
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_BOOT_MODE BootMode;
Status = (*PeiServices)->GetBootMode (PeiServices, &BootMode);
ASSERT_EFI_ERROR (Status);
if (BootMode == BOOT_IN_RECOVERY_MODE) {
return TRUE;
}
return FALSE;
}
/** /**
Provide the functionality of the variable services. Provide the functionality of the variable services.
@ -64,24 +79,7 @@ PeimInitializeVariableServices (
IN CONST EFI_PEI_SERVICES **PeiServices IN CONST EFI_PEI_SERVICES **PeiServices
) )
{ {
EFI_BOOT_MODE BootMode;
EFI_STATUS Status;
//
// Check if this is recovery boot path.
// If no, provide other modules the access capability to variable area in NV storage.
// If yes, the content of variable area is not reliable. Therefore,
// we provide a dummy ReadOnlyVariable2Ppi interface to other pei modules.
//
Status = (*PeiServices)->GetBootMode (PeiServices, &BootMode);
ASSERT_EFI_ERROR (Status);
if (BootMode == BOOT_IN_RECOVERY_MODE) {
return PeiServicesInstallPpi (&mPpiListVariableRecovery);
}
return PeiServicesInstallPpi (&mPpiListVariable); return PeiServicesInstallPpi (&mPpiListVariable);
} }
/** /**
@ -563,6 +561,16 @@ PeiGetVariable (
if (VariableName == NULL || VariableGuid == NULL || DataSize == NULL) { if (VariableName == NULL || VariableGuid == NULL || DataSize == NULL) {
return EFI_INVALID_PARAMETER; return EFI_INVALID_PARAMETER;
} }
//
// Check if this is recovery boot path.
// If yes, the content of variable area is not reliable. Therefore we directly
// return EFI_NOT_FOUND.
//
if (IsInRecoveryMode(PeiServices)) {
return EFI_NOT_FOUND;
}
// //
// Find existing variable // Find existing variable
// //
@ -641,6 +649,15 @@ PeiGetNextVariableName (
return EFI_INVALID_PARAMETER; return EFI_INVALID_PARAMETER;
} }
//
// Check if this is recovery boot path.
// If yes, the content of variable area is not reliable. Therefore we directly
// return EFI_NOT_FOUND.
//
if (IsInRecoveryMode(PeiServices)) {
return EFI_NOT_FOUND;
}
Status = FindVariable (PeiServices, VariableName, VariableGuid, &Variable); Status = FindVariable (PeiServices, VariableName, VariableGuid, &Variable);
if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) { if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {
return Status; return Status;
@ -684,84 +701,3 @@ PeiGetNextVariableName (
return EFI_NOT_FOUND; return EFI_NOT_FOUND;
} }
/**
This service retrieves a variable's value using its name and GUID.
Read the specified variable from the UEFI variable store. If the Data
buffer is too small to hold the contents of the variable, the error
EFI_BUFFER_TOO_SMALL is returned and DataSize is set to the required buffer
size to obtain the data.
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
@param VariableName A pointer to a null-terminated string that is the variable's name.
@param VariableGuid A pointer to an EFI_GUID that is the variable's GUID. The combination of
VariableGuid and VariableName must be unique.
@param Attributes If non-NULL, on return, points to the variable's attributes.
@param DataSize On entry, points to the size in bytes of the Data buffer.
On return, points to the size of the data returned in Data.
@param Data Points to the buffer which will hold the returned variable value.
@retval EFI_SUCCESS The variable was read successfully.
@retval EFI_NOT_FOUND The variable could not be found.
@retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the resulting data.
DataSize is updated with the size required for
the specified variable.
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid, DataSize or Data is NULL.
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
**/
EFI_STATUS
EFIAPI
PeiGetVariableRecovery (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN CONST CHAR16 *VariableName,
IN CONST EFI_GUID *VariableGuid,
OUT UINT32 *Attributes,
IN OUT UINTN *DataSize,
OUT VOID *Data
)
{
return EFI_NOT_FOUND;
}
/**
Return the next variable name and GUID.
This function is called multiple times to retrieve the VariableName
and VariableGuid of all variables currently available in the system.
On each call, the previous results are passed into the interface,
and, on return, the interface returns the data for the next
interface. When the entire variable list has been returned,
EFI_NOT_FOUND is returned.
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
@param VariableNameSize On entry, points to the size of the buffer pointed to by VariableName.
@param VariableName On entry, a pointer to a null-terminated string that is the variable's name.
On return, points to the next variable's null-terminated name string.
@param VariableGuid On entry, a pointer to an UEFI _GUID that is the variable's GUID.
On return, a pointer to the next variable's GUID.
@retval EFI_SUCCESS The variable was read successfully.
@retval EFI_NOT_FOUND The variable could not be found.
@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the resulting
data. VariableNameSize is updated with the size
required for the specified variable.
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid or
VariableNameSize is NULL.
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
**/
EFI_STATUS
EFIAPI
PeiGetNextVariableNameRecovery (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VariableGuid
)
{
return EFI_NOT_FOUND;
}

76
MdeModulePkg/Universal/Variable/Pei/Variable.h
View File

@ -153,80 +153,4 @@ PeiGetNextVariableName (
IN OUT EFI_GUID *VariableGuid IN OUT EFI_GUID *VariableGuid
); );
/**
This service retrieves a variable's value using its name and GUID.
Read the specified variable from the UEFI variable store. If the Data
buffer is too small to hold the contents of the variable, the error
EFI_BUFFER_TOO_SMALL is returned and DataSize is set to the required buffer
size to obtain the data.
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
@param VariableName A pointer to a null-terminated string that is the variable's name.
@param VariableGuid A pointer to an EFI_GUID that is the variable's GUID. The combination of
VariableGuid and VariableName must be unique.
@param Attributes If non-NULL, on return, points to the variable's attributes.
@param DataSize On entry, points to the size in bytes of the Data buffer.
On return, points to the size of the data returned in Data.
@param Data Points to the buffer which will hold the returned variable value.
@retval EFI_SUCCESS The variable was read successfully.
@retval EFI_NOT_FOUND The variable could not be found.
@retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the resulting data.
DataSize is updated with the size required for
the specified variable.
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid, DataSize or Data is NULL.
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
**/
EFI_STATUS
EFIAPI
PeiGetVariableRecovery (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN CONST CHAR16 *VariableName,
IN CONST EFI_GUID *VariableGuid,
OUT UINT32 *Attributes,
IN OUT UINTN *DataSize,
OUT VOID *Data
);
/**
Return the next variable name and GUID.
This function is called multiple times to retrieve the VariableName
and VariableGuid of all variables currently available in the system.
On each call, the previous results are passed into the interface,
and, on return, the interface returns the data for the next
interface. When the entire variable list has been returned,
EFI_NOT_FOUND is returned.
@param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.
@param VariableNameSize On entry, points to the size of the buffer pointed to by VariableName.
@param VariableName On entry, a pointer to a null-terminated string that is the variable's name.
On return, points to the next variable's null-terminated name string.
@param VariableGuid On entry, a pointer to an UEFI _GUID that is the variable's GUID.
On return, a pointer to the next variable's GUID.
@retval EFI_SUCCESS The variable was read successfully.
@retval EFI_NOT_FOUND The variable could not be found.
@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the resulting
data. VariableNameSize is updated with the size
required for the specified variable.
@retval EFI_INVALID_PARAMETER VariableName, VariableGuid or
VariableNameSize is NULL.
@retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.
**/
EFI_STATUS
EFIAPI
PeiGetNextVariableNameRecovery (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VariableGuid
);
#endif #endif

2
MdeModulePkg/Universal/Variable/Pei/VariablePei.inf
View File

@ -56,7 +56,7 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64 ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64 ## CONSUMES
[Depex] [Depex]
gEfiPeiMasterBootModePpiGuid TRUE
# #
# [BootMode] # [BootMode]