3) A support protocol is not found, and the data is not available to be read\r
without it. This results in EFI_PROTOCOL_ERROR.\r
\r
-Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
if (Child->Type != SearchType) {\r
return FALSE;\r
}\r
- if (SearchType != EFI_SECTION_GUID_DEFINED) {\r
+ if ((SearchType != EFI_SECTION_GUID_DEFINED) || (SectionDefinitionGuid == NULL)) {\r
return TRUE;\r
}\r
GuidedSection = (EFI_GUID_DEFINED_SECTION * )(Stream->StreamBuffer + Child->OffsetInStream);\r
return CompareGuid (&GuidedSection->SectionDefinitionGuid, SectionDefinitionGuid);\r
}\r
\r
+/**\r
+ RPN callback function. Initializes the section stream\r
+ when GUIDED_SECTION_EXTRACTION_PROTOCOL is installed.\r
+\r
+ @param Event The event that fired\r
+ @param RpnContext A pointer to the context that allows us to identify\r
+ the relevent encapsulation.\r
+**/\r
+VOID\r
+EFIAPI\r
+NotifyGuidedExtraction (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *RpnContext\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_GUID_DEFINED_SECTION *GuidedHeader;\r
+ EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL *GuidedExtraction;\r
+ VOID *NewStreamBuffer;\r
+ UINTN NewStreamBufferSize;\r
+ UINT32 AuthenticationStatus;\r
+ RPN_EVENT_CONTEXT *Context;\r
+ \r
+ Context = RpnContext;\r
+ \r
+ GuidedHeader = (EFI_GUID_DEFINED_SECTION *) (Context->ParentStream->StreamBuffer + Context->ChildNode->OffsetInStream);\r
+ ASSERT (GuidedHeader->CommonHeader.Type == EFI_SECTION_GUID_DEFINED);\r
+ \r
+ Status = gBS->LocateProtocol (Context->ChildNode->EncapsulationGuid, NULL, (VOID **)&GuidedExtraction);\r
+ if (EFI_ERROR (Status)) {\r
+ return;\r
+ }\r
+ \r
+ Status = GuidedExtraction->ExtractSection (\r
+ GuidedExtraction,\r
+ GuidedHeader,\r
+ &NewStreamBuffer,\r
+ &NewStreamBufferSize,\r
+ &AuthenticationStatus\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ //\r
+ // Make sure we initialize the new stream with the correct\r
+ // authentication status for both aggregate and local status fields.\r
+ //\r
+ if ((GuidedHeader->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) != 0) {\r
+ //\r
+ // OR in the parent stream's aggregate status.\r
+ //\r
+ AuthenticationStatus |= Context->ParentStream->AuthenticationStatus & EFI_AUTH_STATUS_ALL;\r
+ } else {\r
+ //\r
+ // since there's no authentication data contributed by the section,\r
+ // just inherit the full value from our immediate parent.\r
+ //\r
+ AuthenticationStatus = Context->ParentStream->AuthenticationStatus;\r
+ }\r
+\r
+ Status = OpenSectionStreamEx (\r
+ NewStreamBufferSize,\r
+ NewStreamBuffer,\r
+ FALSE,\r
+ AuthenticationStatus,\r
+ &Context->ChildNode->EncapsulatedStreamHandle\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ //\r
+ // Close the event when done.\r
+ //\r
+ gBS->CloseEvent (Event);\r
+ FreePool (Context);\r
+} \r
+\r
+/**\r
+ Constructor for RPN event when a missing GUIDED_SECTION_EXTRACTION_PROTOCOL appears...\r
+\r
+ @param ParentStream Indicates the parent of the ecnapsulation section (child)\r
+ @param ChildNode Indicates the child node that is the encapsulation section.\r
+\r
+**/\r
+VOID\r
+CreateGuidedExtractionRpnEvent (\r
+ IN CORE_SECTION_STREAM_NODE *ParentStream,\r
+ IN CORE_SECTION_CHILD_NODE *ChildNode\r
+ )\r
+{\r
+ RPN_EVENT_CONTEXT *Context;\r
+ \r
+ //\r
+ // Allocate new event structure and context\r
+ //\r
+ Context = AllocatePool (sizeof (RPN_EVENT_CONTEXT));\r
+ ASSERT (Context != NULL);\r
+ \r
+ Context->ChildNode = ChildNode;\r
+ Context->ParentStream = ParentStream;\r
+ \r
+ Context->Event = EfiCreateProtocolNotifyEvent (\r
+ Context->ChildNode->EncapsulationGuid,\r
+ TPL_NOTIFY,\r
+ NotifyGuidedExtraction,\r
+ Context,\r
+ &Context->Registration\r
+ );\r
+}\r
\r
/**\r
Worker function. Constructor for new child nodes.\r
GuidedHeader = (EFI_GUID_DEFINED_SECTION *) SectionHeader;\r
Node->EncapsulationGuid = &GuidedHeader->SectionDefinitionGuid;\r
Status = CoreLocateProtocol (Node->EncapsulationGuid, NULL, (VOID **)&GuidedExtraction);\r
- if (!EFI_ERROR (Status)) {\r
+ if (!EFI_ERROR (Status) && GuidedExtraction != NULL) {\r
//\r
// NewStreamBuffer is always allocated by ExtractSection... No caller\r
// allocation here.\r
//\r
if ((GuidedHeader->Attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) != 0) {\r
//\r
- // If the section REQUIRES an extraction protocol, then we're toast\r
+ // If the section REQUIRES an extraction protocol, register for RPN \r
+ // when the required GUIDed extraction protocol becomes available. \r
//\r
- CoreFreePool (*ChildNode);\r
- return EFI_PROTOCOL_ERROR;\r
- }\r
-\r
- //\r
- // Figure out the proper authentication status\r
- //\r
- AuthenticationStatus = Stream->AuthenticationStatus;\r
+ CreateGuidedExtractionRpnEvent (Stream, Node);\r
+ } else {\r
+ //\r
+ // Figure out the proper authentication status\r
+ //\r
+ AuthenticationStatus = Stream->AuthenticationStatus;\r
\r
- SectionLength = SECTION_SIZE (GuidedHeader);\r
- Status = OpenSectionStreamEx (\r
- SectionLength - GuidedHeader->DataOffset,\r
- (UINT8 *) GuidedHeader + GuidedHeader->DataOffset,\r
- TRUE,\r
- AuthenticationStatus,\r
- &Node->EncapsulatedStreamHandle\r
- );\r
- if (EFI_ERROR (Status)) {\r
- CoreFreePool (Node);\r
- return Status;\r
+ SectionLength = SECTION_SIZE (GuidedHeader);\r
+ Status = OpenSectionStreamEx (\r
+ SectionLength - GuidedHeader->DataOffset,\r
+ (UINT8 *) GuidedHeader + GuidedHeader->DataOffset,\r
+ TRUE,\r
+ AuthenticationStatus,\r
+ &Node->EncapsulatedStreamHandle\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ CoreFreePool (Node);\r
+ return Status;\r
+ }\r
}\r
}\r
\r
CurrentChildNode = CHILD_SECTION_NODE_FROM_LINK (GetFirstNode(&SourceStream->Children));\r
\r
for (;;) {\r
+ ASSERT (CurrentChildNode != NULL);\r
if (ChildIsType (SourceStream, CurrentChildNode, SearchType, SectionDefinitionGuid)) {\r
//\r
// The type matches, so check the instance count to see if it's the one we want\r
} else {\r
ErrorStatus = Status;\r
}\r
+ } else if ((CurrentChildNode->Type == EFI_SECTION_GUID_DEFINED) && (SearchType != EFI_SECTION_GUID_DEFINED)) {\r
+ //\r
+ // When Node Type is GUIDED section, but Node has no encapsulated data, Node data should not be parsed\r
+ // because a required GUIDED section extraction protocol does not exist.\r
+ // If SearchType is not GUIDED section, EFI_PROTOCOL_ERROR should return.\r
+ //\r
+ ErrorStatus = EFI_PROTOCOL_ERROR;\r
}\r
\r
if (!IsNodeAtEnd (&SourceStream->Children, &CurrentChildNode->Link)) {\r
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