169 #define sem_ids(ns)	((ns)->ids[IPC_SEM_IDS])  argument
224 void sem_init_ns(struct ipc_namespace *ns)  in sem_init_ns()  argument
226 	ns->sc_semmsl = SEMMSL;  in sem_init_ns()
227 	ns->sc_semmns = SEMMNS;  in sem_init_ns()
228 	ns->sc_semopm = SEMOPM;  in sem_init_ns()
229 	ns->sc_semmni = SEMMNI;  in sem_init_ns()
230 	ns->used_sems = 0;  in sem_init_ns()
231 	ipc_init_ids(&ns->ids[IPC_SEM_IDS]);  in sem_init_ns()
235 void sem_exit_ns(struct ipc_namespace *ns)  in sem_exit_ns()  argument
237 	free_ipcs(ns, &sem_ids(ns), freeary);  in sem_exit_ns()
238 	idr_destroy(&ns->ids[IPC_SEM_IDS].ipcs_idr);  in sem_exit_ns()
239 	rhashtable_destroy(&ns->ids[IPC_SEM_IDS].key_ht);  in sem_exit_ns()
456 static inline struct sem_array *sem_obtain_object(struct ipc_namespace *ns, int id)  in sem_obtain_object()  argument
458 	struct kern_ipc_perm *ipcp = ipc_obtain_object_idr(&sem_ids(ns), id);  in sem_obtain_object()
466 static inline struct sem_array *sem_obtain_object_check(struct ipc_namespace *ns,  in sem_obtain_object_check()  argument
469 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&sem_ids(ns), id);  in sem_obtain_object_check()
483 static inline void sem_rmid(struct ipc_namespace *ns, struct sem_array *s)  in sem_rmid()  argument
485 	ipc_rmid(&sem_ids(ns), &s->sem_perm);  in sem_rmid()
509 static int newary(struct ipc_namespace *ns, struct ipc_params *params)  in newary()  argument
520 	if (ns->used_sems + nsems > ns->sc_semmns)  in newary()
552 	retval = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);  in newary()
557 	ns->used_sems += nsems;  in newary()
583 	struct ipc_namespace *ns;  in ksys_semget()  local
591 	ns = current->nsproxy->ipc_ns;  in ksys_semget()
593 	if (nsems < 0 || nsems > ns->sc_semmsl)  in ksys_semget()
600 	return ipcget(ns, &sem_ids(ns), &sem_ops, &sem_params);  in ksys_semget()
1124 static void freeary(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)  in freeary()  argument
1167 	sem_rmid(ns, sma);  in freeary()
1172 	ns->used_sems -= sma->sem_nsems;  in freeary()
1215 static int semctl_stat(struct ipc_namespace *ns, int semid,  in semctl_stat()  argument
1226 		sma = sem_obtain_object(ns, semid);  in semctl_stat()
1232 		sma = sem_obtain_object_check(ns, semid);  in semctl_stat()
1244 		if (ipcperms(ns, &sma->sem_perm, S_IRUGO))  in semctl_stat()
1289 static int semctl_info(struct ipc_namespace *ns, int semid,  in semctl_info()  argument
1301 	seminfo.semmni = ns->sc_semmni;  in semctl_info()
1302 	seminfo.semmns = ns->sc_semmns;  in semctl_info()
1303 	seminfo.semmsl = ns->sc_semmsl;  in semctl_info()
1304 	seminfo.semopm = ns->sc_semopm;  in semctl_info()
1309 	down_read(&sem_ids(ns).rwsem);  in semctl_info()
1311 		seminfo.semusz = sem_ids(ns).in_use;  in semctl_info()
1312 		seminfo.semaem = ns->used_sems;  in semctl_info()
1317 	max_idx = ipc_get_maxidx(&sem_ids(ns));  in semctl_info()
1318 	up_read(&sem_ids(ns).rwsem);  in semctl_info()
1324 static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,  in semctl_setval()  argument
1337 	sma = sem_obtain_object_check(ns, semid);  in semctl_setval()
1349 	if (ipcperms(ns, &sma->sem_perm, S_IWUGO)) {  in semctl_setval()
1386 static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,  in semctl_main()  argument
1397 	sma = sem_obtain_object_check(ns, semid);  in semctl_main()
1406 	if (ipcperms(ns, &sma->sem_perm, cmd == SETALL ? S_IWUGO : S_IRUGO))  in semctl_main()
1583 static int semctl_down(struct ipc_namespace *ns, int semid,  in semctl_down()  argument
1590 	down_write(&sem_ids(ns).rwsem);  in semctl_down()
1593 	ipcp = ipcctl_obtain_check(ns, &sem_ids(ns), semid, cmd,  in semctl_down()
1610 		freeary(ns, ipcp);  in semctl_down()
1629 	up_write(&sem_ids(ns).rwsem);  in semctl_down()
1635 	struct ipc_namespace *ns;  in ksys_semctl()  local
1643 	ns = current->nsproxy->ipc_ns;  in ksys_semctl()
1648 		return semctl_info(ns, semid, cmd, p);  in ksys_semctl()
1652 		err = semctl_stat(ns, semid, cmd, &semid64);  in ksys_semctl()
1664 		return semctl_main(ns, semid, semnum, cmd, p);  in ksys_semctl()
1674 		return semctl_setval(ns, semid, semnum, val);  in ksys_semctl()
1681 		return semctl_down(ns, semid, cmd, &semid64);  in ksys_semctl()
1759 	struct ipc_namespace *ns;  in compat_ksys_semctl()  local
1763 	ns = current->nsproxy->ipc_ns;  in compat_ksys_semctl()
1771 		return semctl_info(ns, semid, cmd, p);  in compat_ksys_semctl()
1775 		err = semctl_stat(ns, semid, cmd, &semid64);  in compat_ksys_semctl()
1787 		return semctl_main(ns, semid, semnum, cmd, p);  in compat_ksys_semctl()
1789 		return semctl_setval(ns, semid, semnum, arg);  in compat_ksys_semctl()
1795 		return semctl_down(ns, semid, cmd, &semid64);  in compat_ksys_semctl()
1888 static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid)  in find_alloc_undo()  argument
1908 	sma = sem_obtain_object_check(ns, semid);  in find_alloc_undo()
1978 	struct ipc_namespace *ns;  in do_semtimedop()  local
1980 	ns = current->nsproxy->ipc_ns;  in do_semtimedop()
1984 	if (nsops > ns->sc_semopm)  in do_semtimedop()
2031 		un = find_alloc_undo(ns, semid);  in do_semtimedop()
2041 	sma = sem_obtain_object_check(ns, semid);  in do_semtimedop()
2055 	if (ipcperms(ns, &sma->sem_perm, alter ? S_IWUGO : S_IRUGO)) {  in do_semtimedop()