objset_space_alloc
configloc = objset_space_alloc(zfs, zfs->mos, &configblksz);
c->indloc = objset_space_alloc(zfs, os, &c->indspace);
loc = objset_space_alloc(zfs, arg->fs->os, &reqbytes);
dnodeloc = objset_space_alloc(zfs, os, &dnodesz);
os->osloc = objset_space_alloc(zfs, os, &os->osblksz);
objarrloc = objset_space_alloc(zfs, zfs->mos, &objarrblksz);
sma[i].loc = objset_space_alloc(zfs, zfs->mos, &smblksz);
loc = objset_space_alloc(zfs, zap->os, &bytes);
loc = objset_space_alloc(zfs, zap->os, &blksz);
loc = objset_space_alloc(zfs, zap->os, &blksz);
off_t objset_space_alloc(zfs_opt_t *, zfs_objset_t *, off_t *);