ocfs2_lock_global_qf
int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
status = ocfs2_lock_global_qf(oinfo, 1);
status = ocfs2_lock_global_qf(oinfo, 0);
status = ocfs2_lock_global_qf(oinfo, 1);
status = ocfs2_lock_global_qf(oinfo, 1);
status = ocfs2_lock_global_qf(info, 1);
status = ocfs2_lock_global_qf(info, 0);
status = ocfs2_lock_global_qf(oinfo, 1);
status = ocfs2_lock_global_qf(oinfo, 1);