339 static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,  in msgctl_down()  argument
355 	ipcp = ipcctl_pre_down_nolock(ns, &msg_ids(ns), msqid, cmd,  in msgctl_down()
412 static int msgctl_nolock(struct ipc_namespace *ns, int msqid,  in msgctl_nolock()  argument
473 			msq = msq_obtain_object(ns, msqid);  in msgctl_nolock()
480 			msq = msq_obtain_object_check(ns, msqid);  in msgctl_nolock()
522 SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf)  in SYSCALL_DEFINE3()  argument
527 	if (msqid < 0 || cmd < 0)  in SYSCALL_DEFINE3()
538 		return msgctl_nolock(ns, msqid, cmd, version, buf);  in SYSCALL_DEFINE3()
541 		return msgctl_down(ns, msqid, cmd, buf, version);  in SYSCALL_DEFINE3()
607 long do_msgsnd(int msqid, long mtype, void __user *mtext,  in do_msgsnd()  argument
617 	if (msgsz > ns->msg_ctlmax || (long) msgsz < 0 || msqid < 0)  in do_msgsnd()
630 	msq = msq_obtain_object_check(ns, msqid);  in do_msgsnd()
720 SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,  in SYSCALL_DEFINE4()  argument
727 	return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);  in SYSCALL_DEFINE4()
823 long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgflg,  in do_msgrcv()  argument
833 	if (msqid < 0 || (long) bufsz < 0)  in do_msgrcv()
846 	msq = msq_obtain_object_check(ns, msqid);  in do_msgrcv()
986 SYSCALL_DEFINE5(msgrcv, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,  in SYSCALL_DEFINE5()  argument
989 	return do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg, do_msg_fill);  in SYSCALL_DEFINE5()