All mandatory DMAPI functions and most optional functions that are defined in the XDSM standard, are implemented in DMAPI for GPFS.
For changes and restrictions on DMAPI functions as implemented in GPFS, see "Usage restrictions on DMAPI functions", and "Semantic changes to DMAPI functions". See Appendix B, "DMAPI functions in GPFS" for C declarations of all DMAPI functions in the GPFS implementation of DMAPI.