2.2.8.3.8 SMB_QUERY_FILE_EA_INFO
This information level structure is used in TRANS2_QUERY_PATH_INFORMATION (section 2.2.6.6) and TRANS2_QUERY_FILE_INFORMATION (section 2.2.6.8) responses to return the size of a file's extended attributes (EAs) list for the file specified in the request.<177>
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SMB_QUERY_FILE_EA_INFO { ULONG EaSize; }
EaSize: (4 bytes): This field MUST contain the length of a file's list of extended attributes in bytes.