98 #define SEARCH_NUMBER		5
100 #define msg_ids(ns)	((ns)->ids[IPC_MSG_IDS])  argument
102 static inline struct msg_queue *msq_obtain_object(struct ipc_namespace *ns, int id)  in msq_obtain_object()  argument
104 	struct kern_ipc_perm *ipcp = ipc_obtain_object_idr(&msg_ids(ns), id);  in msq_obtain_object()
112 static inline struct msg_queue *msq_obtain_object_check(struct ipc_namespace *ns,  in msq_obtain_object_check()  argument
115 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&msg_ids(ns), id);  in msq_obtain_object_check()
123 static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s)  in msg_rmid()  argument
125 	ipc_rmid(&msg_ids(ns), &s->q_perm);  in msg_rmid()
139  * @ns: namespace
144 static int newque(struct ipc_namespace *ns, struct ipc_params *params)  in newque()  argument
168 	msq->q_qbytes = ns->msg_ctlmnb;  in newque()
175 	retval = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);  in newque()
273 static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)  in freeque()  argument
283 	msg_rmid(ns, msq);  in freeque()
289 		percpu_counter_sub_local(&ns->percpu_msg_hdrs, 1);  in freeque()
292 	percpu_counter_sub_local(&ns->percpu_msg_bytes, msq->q_cbytes);  in freeque()
300 	struct ipc_namespace *ns;  in ksys_msgget()  local
307 	ns = current->nsproxy->ipc_ns;  in ksys_msgget()
312 	return ipcget(ns, &msg_ids(ns), &msg_ops, &msg_params);  in ksys_msgget()
401 static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,  in msgctl_down()  argument
408 	down_write(&msg_ids(ns).rwsem);  in msgctl_down()
411 	ipcp = ipcctl_obtain_check(ns, &msg_ids(ns), msqid, cmd,  in msgctl_down()
428 		freeque(ns, ipcp);  in msgctl_down()
434 		if (msg_qbytes > ns->msg_ctlmnb &&  in msgctl_down()
473 	up_write(&msg_ids(ns).rwsem);  in msgctl_down()
477 static int msgctl_info(struct ipc_namespace *ns, int msqid,  in msgctl_info()  argument
493 	msginfo->msgmni = ns->msg_ctlmni;  in msgctl_info()
494 	msginfo->msgmax = ns->msg_ctlmax;  in msgctl_info()
495 	msginfo->msgmnb = ns->msg_ctlmnb;  in msgctl_info()
498 	down_read(&msg_ids(ns).rwsem);  in msgctl_info()
500 		msginfo->msgpool = msg_ids(ns).in_use;  in msgctl_info()
501 	max_idx = ipc_get_maxidx(&msg_ids(ns));  in msgctl_info()
502 	up_read(&msg_ids(ns).rwsem);  in msgctl_info()
505 				     percpu_counter_sum(&ns->percpu_msg_hdrs),  in msgctl_info()
508 		                     percpu_counter_sum(&ns->percpu_msg_bytes),  in msgctl_info()
518 static int msgctl_stat(struct ipc_namespace *ns, int msqid,  in msgctl_stat()  argument
528 		msq = msq_obtain_object(ns, msqid);  in msgctl_stat()
534 		msq = msq_obtain_object_check(ns, msqid);  in msgctl_stat()
546 		if (ipcperms(ns, &msq->q_perm, S_IRUGO))  in msgctl_stat()
599 	struct ipc_namespace *ns;  in ksys_msgctl()  local
606 	ns = current->nsproxy->ipc_ns;  in ksys_msgctl()
612 		err = msgctl_info(ns, msqid, cmd, &msginfo);  in ksys_msgctl()
622 		err = msgctl_stat(ns, msqid, cmd, &msqid64);  in ksys_msgctl()
631 		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,  in ksys_msgctl()
634 		return msgctl_down(ns, msqid, cmd, NULL, 0);  in ksys_msgctl()
734 	struct ipc_namespace *ns;  in compat_ksys_msgctl()  local
738 	ns = current->nsproxy->ipc_ns;  in compat_ksys_msgctl()
747 		err = msgctl_info(ns, msqid, cmd, &msginfo);  in compat_ksys_msgctl()
757 		err = msgctl_stat(ns, msqid, cmd, &msqid64);  in compat_ksys_msgctl()
766 		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes);  in compat_ksys_msgctl()
768 		return msgctl_down(ns, msqid, cmd, NULL, 0);  in compat_ksys_msgctl()
854 	struct ipc_namespace *ns;  in do_msgsnd()  local
857 	ns = current->nsproxy->ipc_ns;  in do_msgsnd()
859 	if (msgsz > ns->msg_ctlmax || (long) msgsz < 0 || msqid < 0)  in do_msgsnd()
872 	msq = msq_obtain_object_check(ns, msqid);  in do_msgsnd()
884 		if (ipcperms(ns, &msq->q_perm, S_IWUGO))  in do_msgsnd()
944 		percpu_counter_add_local(&ns->percpu_msg_bytes, msgsz);  in do_msgsnd()
945 		percpu_counter_add_local(&ns->percpu_msg_hdrs, 1);  in do_msgsnd()
1103 	struct ipc_namespace *ns;  in do_msgrcv()  local
1107 	ns = current->nsproxy->ipc_ns;  in do_msgrcv()
1115 		copy = prepare_copy(buf, min_t(size_t, bufsz, ns->msg_ctlmax));  in do_msgrcv()
1122 	msq = msq_obtain_object_check(ns, msqid);  in do_msgrcv()
1133 		if (ipcperms(ns, &msq->q_perm, S_IRUGO))  in do_msgrcv()
1168 			percpu_counter_sub_local(&ns->percpu_msg_bytes, msg->m_ts);  in do_msgrcv()
1169 			percpu_counter_sub_local(&ns->percpu_msg_hdrs, 1);  in do_msgrcv()
1306 int msg_init_ns(struct ipc_namespace *ns)  in msg_init_ns()  argument
1310 	ns->msg_ctlmax = MSGMAX;  in msg_init_ns()
1311 	ns->msg_ctlmnb = MSGMNB;  in msg_init_ns()
1312 	ns->msg_ctlmni = MSGMNI;  in msg_init_ns()
1314 	ret = percpu_counter_init(&ns->percpu_msg_bytes, 0, GFP_KERNEL);  in msg_init_ns()
1317 	ret = percpu_counter_init(&ns->percpu_msg_hdrs, 0, GFP_KERNEL);  in msg_init_ns()
1320 	ipc_init_ids(&ns->ids[IPC_MSG_IDS]);  in msg_init_ns()
1324 	percpu_counter_destroy(&ns->percpu_msg_bytes);  in msg_init_ns()
1330 void msg_exit_ns(struct ipc_namespace *ns)  in msg_exit_ns()  argument
1332 	free_ipcs(ns, &msg_ids(ns), freeque);  in msg_exit_ns()
1333 	idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr);  in msg_exit_ns()
1334 	rhashtable_destroy(&ns->ids[IPC_MSG_IDS].key_ht);  in msg_exit_ns()
1335 	percpu_counter_destroy(&ns->percpu_msg_bytes);  in msg_exit_ns()
1336 	percpu_counter_destroy(&ns->percpu_msg_hdrs);  in msg_exit_ns()
1349 		   "%10d %10d  %4o  %10lu %10lu %5u %5u %5u %5u %5u %5u %10llu %10llu %10llu\n",  in sysvipc_msg_proc_show()