97 #define SEARCH_NUMBER		5
99 #define msg_ids(ns)	((ns)->ids[IPC_MSG_IDS])  argument
101 static inline struct msg_queue *msq_obtain_object(struct ipc_namespace *ns, int id)  in msq_obtain_object()  argument
103 	struct kern_ipc_perm *ipcp = ipc_obtain_object_idr(&msg_ids(ns), id);  in msq_obtain_object()
111 static inline struct msg_queue *msq_obtain_object_check(struct ipc_namespace *ns,  in msq_obtain_object_check()  argument
114 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&msg_ids(ns), id);  in msq_obtain_object_check()
122 static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s)  in msg_rmid()  argument
124 	ipc_rmid(&msg_ids(ns), &s->q_perm);  in msg_rmid()
138  * @ns: namespace
143 static int newque(struct ipc_namespace *ns, struct ipc_params *params)  in newque()  argument
167 	msq->q_qbytes = ns->msg_ctlmnb;  in newque()
174 	retval = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);  in newque()
272 static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)  in freeque()  argument
282 	msg_rmid(ns, msq);  in freeque()
288 		atomic_dec(&ns->msg_hdrs);  in freeque()
291 	atomic_sub(msq->q_cbytes, &ns->msg_bytes);  in freeque()
299 	struct ipc_namespace *ns;  in ksys_msgget()  local
306 	ns = current->nsproxy->ipc_ns;  in ksys_msgget()
311 	return ipcget(ns, &msg_ids(ns), &msg_ops, &msg_params);  in ksys_msgget()
400 static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,  in msgctl_down()  argument
407 	down_write(&msg_ids(ns).rwsem);  in msgctl_down()
410 	ipcp = ipcctl_obtain_check(ns, &msg_ids(ns), msqid, cmd,  in msgctl_down()
427 		freeque(ns, ipcp);  in msgctl_down()
433 		if (msg_qbytes > ns->msg_ctlmnb &&  in msgctl_down()
472 	up_write(&msg_ids(ns).rwsem);  in msgctl_down()
476 static int msgctl_info(struct ipc_namespace *ns, int msqid,  in msgctl_info()  argument
492 	msginfo->msgmni = ns->msg_ctlmni;  in msgctl_info()
493 	msginfo->msgmax = ns->msg_ctlmax;  in msgctl_info()
494 	msginfo->msgmnb = ns->msg_ctlmnb;  in msgctl_info()
497 	down_read(&msg_ids(ns).rwsem);  in msgctl_info()
499 		msginfo->msgpool = msg_ids(ns).in_use;  in msgctl_info()
500 		msginfo->msgmap = atomic_read(&ns->msg_hdrs);  in msgctl_info()
501 		msginfo->msgtql = atomic_read(&ns->msg_bytes);  in msgctl_info()
507 	max_idx = ipc_get_maxidx(&msg_ids(ns));  in msgctl_info()
508 	up_read(&msg_ids(ns).rwsem);  in msgctl_info()
512 static int msgctl_stat(struct ipc_namespace *ns, int msqid,  in msgctl_stat()  argument
522 		msq = msq_obtain_object(ns, msqid);  in msgctl_stat()
528 		msq = msq_obtain_object_check(ns, msqid);  in msgctl_stat()
540 		if (ipcperms(ns, &msq->q_perm, S_IRUGO))  in msgctl_stat()
593 	struct ipc_namespace *ns;  in ksys_msgctl()  local
600 	ns = current->nsproxy->ipc_ns;  in ksys_msgctl()
606 		err = msgctl_info(ns, msqid, cmd, &msginfo);  in ksys_msgctl()
616 		err = msgctl_stat(ns, msqid, cmd, &msqid64);  in ksys_msgctl()
625 		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,  in ksys_msgctl()
628 		return msgctl_down(ns, msqid, cmd, NULL, 0);  in ksys_msgctl()
728 	struct ipc_namespace *ns;  in compat_ksys_msgctl()  local
732 	ns = current->nsproxy->ipc_ns;  in compat_ksys_msgctl()
741 		err = msgctl_info(ns, msqid, cmd, &msginfo);  in compat_ksys_msgctl()
751 		err = msgctl_stat(ns, msqid, cmd, &msqid64);  in compat_ksys_msgctl()
760 		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes);  in compat_ksys_msgctl()
762 		return msgctl_down(ns, msqid, cmd, NULL, 0);  in compat_ksys_msgctl()
848 	struct ipc_namespace *ns;  in do_msgsnd()  local
851 	ns = current->nsproxy->ipc_ns;  in do_msgsnd()
853 	if (msgsz > ns->msg_ctlmax || (long) msgsz < 0 || msqid < 0)  in do_msgsnd()
866 	msq = msq_obtain_object_check(ns, msqid);  in do_msgsnd()
878 		if (ipcperms(ns, &msq->q_perm, S_IWUGO))  in do_msgsnd()
938 		atomic_add(msgsz, &ns->msg_bytes);  in do_msgsnd()
939 		atomic_inc(&ns->msg_hdrs);  in do_msgsnd()
1097 	struct ipc_namespace *ns;  in do_msgrcv()  local
1101 	ns = current->nsproxy->ipc_ns;  in do_msgrcv()
1109 		copy = prepare_copy(buf, min_t(size_t, bufsz, ns->msg_ctlmax));  in do_msgrcv()
1116 	msq = msq_obtain_object_check(ns, msqid);  in do_msgrcv()
1127 		if (ipcperms(ns, &msq->q_perm, S_IRUGO))  in do_msgrcv()
1162 			atomic_sub(msg->m_ts, &ns->msg_bytes);  in do_msgrcv()
1163 			atomic_dec(&ns->msg_hdrs);  in do_msgrcv()
1300 void msg_init_ns(struct ipc_namespace *ns)  in msg_init_ns()  argument
1302 	ns->msg_ctlmax = MSGMAX;  in msg_init_ns()
1303 	ns->msg_ctlmnb = MSGMNB;  in msg_init_ns()
1304 	ns->msg_ctlmni = MSGMNI;  in msg_init_ns()
1306 	atomic_set(&ns->msg_bytes, 0);  in msg_init_ns()
1307 	atomic_set(&ns->msg_hdrs, 0);  in msg_init_ns()
1308 	ipc_init_ids(&ns->ids[IPC_MSG_IDS]);  in msg_init_ns()
1312 void msg_exit_ns(struct ipc_namespace *ns)  in msg_exit_ns()  argument
1314 	free_ipcs(ns, &msg_ids(ns), freeque);  in msg_exit_ns()
1315 	idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr);  in msg_exit_ns()
1316 	rhashtable_destroy(&ns->ids[IPC_MSG_IDS].key_ht);  in msg_exit_ns()
1329 		   "%10d %10d  %4o  %10lu %10lu %5u %5u %5u %5u %5u %5u %10llu %10llu %10llu\n",  in sysvipc_msg_proc_show()