Symbol: zfs_get_hole_count
usr/src/lib/libzfs/common/libzfs.h
859
extern int zfs_get_hole_count(const char *, uint64_t *, uint64_t *);
usr/src/test/zfs-tests/cmd/getholes/getholes.c
77
if (zfs_get_hole_count(fname, &lz_holes, &bs) != 0) {