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sys, dll: reparse point (symbolic link) support: WIP

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This commit is contained in:
Bill Zissimopoulos
2016-07-25 21:27:48 -07:00
parent 380ec074ca
commit a8d76d3e46
8 changed files with 853 additions and 196 deletions
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83
src/sys/create.c
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@ -335,9 +335,12 @@ static NTSTATUS FspFsvolCreateNoLock(
}
/* fix FileAttributes */
ClearFlag(FileAttributes, FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_DIRECTORY);
ClearFlag(FileAttributes,
FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT);
if (CreateOptions & FILE_DIRECTORY_FILE)
SetFlag(FileAttributes, FILE_ATTRIBUTE_DIRECTORY);
if (CreateOptions & FILE_OPEN_REPARSE_POINT)
SetFlag(FileAttributes, FILE_ATTRIBUTE_REPARSE_POINT);
/*
* The new request is associated with our IRP. Go ahead and associate our FileNode/FileDesc
@ -486,6 +489,7 @@ NTSTATUS FspFsvolCreateComplete(
FSP_FILE_NODE *FileNode = FileDesc->FileNode;
FSP_FILE_NODE *OpenedFileNode;
UNICODE_STRING ReparseFileName;
PREPARSE_DATA_BUFFER ReparseData;
if (FspFsctlTransactCreateKind == Request->Kind)
{
@ -498,20 +502,25 @@ NTSTATUS FspFsvolCreateComplete(
}
/* special case STATUS_REPARSE */
if (STATUS_REPARSE == Result)
if (STATUS_REPARSE == Response->IoStatus.Status)
{
ReparseFileName.Buffer =
(PVOID)(Response->Buffer + Response->Rsp.Create.Reparse.FileName.Offset);
ReparseFileName.Length = ReparseFileName.MaximumLength =
Response->Rsp.Create.Reparse.FileName.Size;
Result = STATUS_ACCESS_DENIED;
if (IO_REPARSE == Response->IoStatus.Information)
if (IO_REMOUNT == Response->IoStatus.Information)
{
if (0 == ReparseFileName.Length ||
(PUINT8)ReparseFileName.Buffer + ReparseFileName.Length >
(PUINT8)Response + Response->Size)
FSP_RETURN();
Irp->IoStatus.Information = IO_REMOUNT;
Result = STATUS_REPARSE;
FSP_RETURN();
}
else if (IO_REPARSE == Response->IoStatus.Information)
{
ReparseFileName.Buffer =
(PVOID)(Response->Buffer + Response->Rsp.Create.Reparse.FileName.Offset);
ReparseFileName.Length = ReparseFileName.MaximumLength =
Response->Rsp.Create.Reparse.FileName.Size;
if ((PUINT8)ReparseFileName.Buffer + ReparseFileName.Length >
(PUINT8)Response + Response->Size ||
0 == ReparseFileName.Length)
FSP_RETURN(Result = STATUS_REPARSE_POINT_NOT_RESOLVED);
if (ReparseFileName.Length > FileObject->FileName.MaximumLength)
{
@ -539,19 +548,43 @@ NTSTATUS FspFsvolCreateComplete(
* STATUS_REPARSE status returned by the filter. Therefore, it is not
* the responsibility of the filter to free that file object.
*/
}
else
if (IO_REMOUNT == Response->IoStatus.Information)
{
if (0 != ReparseFileName.Length)
FSP_RETURN();
}
else
FSP_RETURN();
Irp->IoStatus.Information = (ULONG_PTR)Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
Irp->IoStatus.Information = IO_REPARSE;
Result = STATUS_REPARSE;
FSP_RETURN();
}
else
{
ReparseData = (PVOID)(Response->Buffer + Response->Rsp.Create.Reparse.Data.Offset);
if ((PUINT8)ReparseData + Response->Rsp.Create.Reparse.Data.Size >
(PUINT8)Response + Response->Size)
{
Result = STATUS_IO_REPARSE_DATA_INVALID;
FSP_RETURN();
}
Result = FsRtlValidateReparsePointBuffer(Response->Rsp.Create.Reparse.Data.Size,
ReparseData);
if (!NT_SUCCESS(Result))
FSP_RETURN();
ASSERT(0 == Irp->Tail.Overlay.AuxiliaryBuffer);
Irp->Tail.Overlay.AuxiliaryBuffer = FspAllocNonPagedExternal(
Response->Rsp.Create.Reparse.Data.Size);
if (0 == Irp->Tail.Overlay.AuxiliaryBuffer)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
FSP_RETURN();
}
RtlCopyMemory(Irp->Tail.Overlay.AuxiliaryBuffer, ReparseData,
Response->Rsp.Create.Reparse.Data.Size);
Irp->IoStatus.Information = ReparseData->ReparseTag;
Result = STATUS_REPARSE;
FSP_RETURN();
}
}
/* fix FileNode->FileName if we were doing SL_OPEN_TARGET_DIRECTORY */