REPARSE_DATA_BUFFER_EX structure (ntifs.h)
The REPARSE_DATA_BUFFER_EX structure contains data for a reparse point.
Syntax
typedef struct _REPARSE_DATA_BUFFER_EX {
ULONG Flags;
ULONG ExistingReparseTag;
GUID ExistingReparseGuid;
ULONGLONG Reserved;
union {
REPARSE_DATA_BUFFER ReparseDataBuffer;
REPARSE_GUID_DATA_BUFFER ReparseGuidDataBuffer;
} DUMMYUNIONNAME;
} REPARSE_DATA_BUFFER_EX, *PREPARSE_DATA_BUFFER_EX;
Members
Flags
Can be the following value:
| Flag Value | Meaning |
|---|---|
| REPARSE_DATA_EX_FLAG_GIVEN_TAG_OR_NONE | Forces FSCTL_SET_REPARSE_POINT_EX to set the reparse tag if the file has no tag, or if the tag on the file is same as the one in ExistingReparseTag. NOTE: If ExistingReparseTag is not a Microsoft tag, then ExistingReparseGuid should match if the file already has the ExistingReparseTag. |
ExistingReparseTag
Reparse point tag on the file, if any, if the caller wants to also replace the reparse tag.
- To set the reparse data along with a reparse tag that might be different, ExistingReparseTag should be the current reparse tag of the file.
- To update the reparse data while maintaining the same reparse tag, ExistingReparseTag should be the existing reparse tag.
- To set the reparse tag along with reparse data on a file that does not yet have a reparse tag, ExistingReparseTag should be set to zero.
ExistingReparseGuid
For non-Microsoft reparse tags, this is the existing reparse GUID on the file, if any, when the caller wants to replace the reparse tag and/or GUID along with the data. If ExistingReparseTag is zero, the file is not expected to have any reparse tags, so ExistingReparseGuid is ignored. For non-Microsoft tags, ExistingReparseGuid should match the GUID in the file if ExistingReparseTag is non-zero.
Reserved
Reserved. Do not use.
DUMMYUNIONNAME
DUMMYUNIONNAME.ReparseDataBuffer
A REPARSE_DATA_BUFFER structure that contains data for a Microsoft-defined reparse point.
DUMMYUNIONNAME.ReparseGuidDataBuffer
A REPARSE_GUID_DATA_BUFFER structure that contains data for a reparse point. Third party reparse points must use this structure.
Remarks
The REPARSE_DATA_BUFFER_EX structure is used to store data for a reparse point. Use REPARSE_DATA_BUFFER_EX when setting a reparse point on a file or directory through the FSCTL_SET_REPARSE_POINT_EX IOCTL.
Requirements
| Requirement | Value |
|---|---|
| Header | ntifs.h |