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sys: FspFsvolFileSystemControlReparsePoint: comments

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This commit is contained in:
Bill Zissimopoulos 2016-09-12 15:27:31 -07:00
parent be8c29114a
commit ccf58122a2
1 changed files with 8 additions and 0 deletions
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8
src/sys/fsctl.c
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@ -159,23 +159,29 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
TargetObjectName.Length = TargetObjectName.MaximumLength = ReparseTargetPathLength;
TargetObjectName.Buffer = ReparseTargetPath;
/* get a pointer to the target device */
Result = FspGetDeviceObjectPointer(&TargetObjectName, FILE_READ_DATA,
&TargetFileNameIndex, &TargetFileObject, &TargetDeviceObject);
if (!NT_SUCCESS(Result))
goto target_check_exit;
/* is the target device the same as ours? */
if (TargetFileNameIndex < ReparseTargetPathLength &&
IoGetRelatedDeviceObject(FileObject) == TargetDeviceObject)
{
if (0 == FsvolDeviceExtension->VolumePrefix.Length)
/* not going thru MUP: DONE! */
TargetOnFileSystem = (UINT16)TargetFileNameIndex;
else
{
/* going thru MUP cases: \Device\Volume{GUID} and \??\UNC\{VolumePrefix} */
ProviderInfoSize = sizeof ProviderInfo;
Result = FsRtlMupGetProviderInfoFromFileObject(TargetFileObject, 1,
&ProviderInfo, &ProviderInfoSize);
if (NT_SUCCESS(Result))
{
/* case \Device\Volume{GUID}: is the targer provider id same as ours? */
TargetProviderId = ProviderInfo.ProviderId;
ProviderInfoSize = sizeof ProviderInfo;
@ -189,6 +195,8 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
}
else
{
/* case \??\UNC\{VolumePrefix}: is the target volume prefix same as ours? */
TargetObjectName.Length = TargetObjectName.MaximumLength =
FsvolDeviceExtension->VolumePrefix.Length;
TargetObjectName.Buffer = ReparseTargetPath +