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2.3.7 FSCTL_DUPLICATE_EXTENTS_TO_FILE Request

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The FSCTL_DUPLICATE_EXTENTS_TO_FILE<18> request message requests that the server copy the specified portion of one file (that is the source file) into a specified portion of another file (target file) on the same volume. The logical sizes of the portions have to be the same. The two files involved in this operation can refer to the same file, but in that case, the logical portions have to refer to disjoint regions on the file. The FSCTL is sent on a handle opened to the target file.

When used locally, the request message takes the form of DUPLICATE_EXTENTS_DATA as specified in section 2.3.7.1. When used remotely with [MS-SMB2], the request message takes the form of SMB2_DUPLICATE_EXTENTS_DATA as specified in section 2.3.7.2.