143 #define sem_ids(ns)	((ns)->ids[IPC_SEM_IDS])  argument
173 void sem_init_ns(struct ipc_namespace *ns)  in sem_init_ns()  argument
175 	ns->sc_semmsl = SEMMSL;  in sem_init_ns()
176 	ns->sc_semmns = SEMMNS;  in sem_init_ns()
177 	ns->sc_semopm = SEMOPM;  in sem_init_ns()
178 	ns->sc_semmni = SEMMNI;  in sem_init_ns()
179 	ns->used_sems = 0;  in sem_init_ns()
180 	ipc_init_ids(&ns->ids[IPC_SEM_IDS]);  in sem_init_ns()
184 void sem_exit_ns(struct ipc_namespace *ns)  in sem_exit_ns()  argument
186 	free_ipcs(ns, &sem_ids(ns), freeary);  in sem_exit_ns()
187 	idr_destroy(&ns->ids[IPC_SEM_IDS].ipcs_idr);  in sem_exit_ns()
398 static inline struct sem_array *sem_obtain_lock(struct ipc_namespace *ns,  in sem_obtain_lock()  argument
404 	ipcp = ipc_obtain_object(&sem_ids(ns), id);  in sem_obtain_lock()
421 static inline struct sem_array *sem_obtain_object(struct ipc_namespace *ns, int id)  in sem_obtain_object()  argument
423 	struct kern_ipc_perm *ipcp = ipc_obtain_object(&sem_ids(ns), id);  in sem_obtain_object()
431 static inline struct sem_array *sem_obtain_object_check(struct ipc_namespace *ns,  in sem_obtain_object_check()  argument
434 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&sem_ids(ns), id);  in sem_obtain_object_check()
448 static inline void sem_rmid(struct ipc_namespace *ns, struct sem_array *s)  in sem_rmid()  argument
450 	ipc_rmid(&sem_ids(ns), &s->sem_perm);  in sem_rmid()
494 static int newary(struct ipc_namespace *ns, struct ipc_params *params)  in newary()  argument
507 	if (ns->used_sems + nsems > ns->sc_semmns)  in newary()
542 	id = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);  in newary()
547 	ns->used_sems += nsems;  in newary()
584 	struct ipc_namespace *ns;  in SYSCALL_DEFINE3()  local
592 	ns = current->nsproxy->ipc_ns;  in SYSCALL_DEFINE3()
594 	if (nsems < 0 || nsems > ns->sc_semmsl)  in SYSCALL_DEFINE3()
601 	return ipcget(ns, &sem_ids(ns), &sem_ops, &sem_params);  in SYSCALL_DEFINE3()
1087 static void freeary(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)  in freeary()  argument
1130 	sem_rmid(ns, sma);  in freeary()
1135 	ns->used_sems -= sma->sem_nsems;  in freeary()
1178 static int semctl_nolock(struct ipc_namespace *ns, int semid,  in semctl_nolock()  argument
1196 		seminfo.semmni = ns->sc_semmni;  in semctl_nolock()
1197 		seminfo.semmns = ns->sc_semmns;  in semctl_nolock()
1198 		seminfo.semmsl = ns->sc_semmsl;  in semctl_nolock()
1199 		seminfo.semopm = ns->sc_semopm;  in semctl_nolock()
1204 		down_read(&sem_ids(ns).rwsem);  in semctl_nolock()
1206 			seminfo.semusz = sem_ids(ns).in_use;  in semctl_nolock()
1207 			seminfo.semaem = ns->used_sems;  in semctl_nolock()
1212 		max_id = ipc_get_maxid(&sem_ids(ns));  in semctl_nolock()
1213 		up_read(&sem_ids(ns).rwsem);  in semctl_nolock()
1228 			sma = sem_obtain_object(ns, semid);  in semctl_nolock()
1235 			sma = sem_obtain_object_check(ns, semid);  in semctl_nolock()
1243 		if (ipcperms(ns, &sma->sem_perm, S_IRUGO))  in semctl_nolock()
1267 static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,  in semctl_setval()  argument
1290 	sma = sem_obtain_object_check(ns, semid);  in semctl_setval()
1302 	if (ipcperms(ns, &sma->sem_perm, S_IWUGO)) {  in semctl_setval()
1338 static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,  in semctl_main()  argument
1351 	sma = sem_obtain_object_check(ns, semid);  in semctl_main()
1360 	if (ipcperms(ns, &sma->sem_perm, cmd == SETALL ? S_IWUGO : S_IRUGO))  in semctl_main()
1531 static int semctl_down(struct ipc_namespace *ns, int semid,  in semctl_down()  argument
1544 	down_write(&sem_ids(ns).rwsem);  in semctl_down()
1547 	ipcp = ipcctl_pre_down_nolock(ns, &sem_ids(ns), semid, cmd,  in semctl_down()
1564 		freeary(ns, ipcp);  in semctl_down()
1583 	up_write(&sem_ids(ns).rwsem);  in semctl_down()
1590 	struct ipc_namespace *ns;  in SYSCALL_DEFINE4()  local
1597 	ns = current->nsproxy->ipc_ns;  in SYSCALL_DEFINE4()
1604 		return semctl_nolock(ns, semid, cmd, version, p);  in SYSCALL_DEFINE4()
1611 		return semctl_main(ns, semid, semnum, cmd, p);  in SYSCALL_DEFINE4()
1613 		return semctl_setval(ns, semid, semnum, arg);  in SYSCALL_DEFINE4()
1616 		return semctl_down(ns, semid, cmd, version, p);  in SYSCALL_DEFINE4()
1688 static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid)  in find_alloc_undo()  argument
1708 	sma = sem_obtain_object_check(ns, semid);  in find_alloc_undo()
1803 	struct ipc_namespace *ns;  in SYSCALL_DEFINE4()  local
1806 	ns = current->nsproxy->ipc_ns;  in SYSCALL_DEFINE4()
1810 	if (nsops > ns->sc_semopm)  in SYSCALL_DEFINE4()
1848 		un = find_alloc_undo(ns, semid);  in SYSCALL_DEFINE4()
1858 	sma = sem_obtain_object_check(ns, semid);  in SYSCALL_DEFINE4()
1870 	if (ipcperms(ns, &sma->sem_perm, alter ? S_IWUGO : S_IRUGO))  in SYSCALL_DEFINE4()
1979 	sma = sem_obtain_lock(ns, semid, sops, nsops, &locknum);  in SYSCALL_DEFINE4()