zfs_secpolicy_snapshot_perms
extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
extern int zfs_secpolicy_snapshot_perms(const char *, cred_t *);
err = zfs_secpolicy_snapshot_perms(name, cr);
error = zfs_secpolicy_snapshot_perms(name, cr);
error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);