169 #define sem_ids(ns)	((ns)->ids[IPC_SEM_IDS])  argument
247 void sem_init_ns(struct ipc_namespace *ns)  in sem_init_ns()  argument
249 	ns->sc_semmsl = SEMMSL;  in sem_init_ns()
250 	ns->sc_semmns = SEMMNS;  in sem_init_ns()
251 	ns->sc_semopm = SEMOPM;  in sem_init_ns()
252 	ns->sc_semmni = SEMMNI;  in sem_init_ns()
253 	ns->used_sems = 0;  in sem_init_ns()
254 	ipc_init_ids(&ns->ids[IPC_SEM_IDS]);  in sem_init_ns()
258 void sem_exit_ns(struct ipc_namespace *ns)  in sem_exit_ns()  argument
260 	free_ipcs(ns, &sem_ids(ns), freeary);  in sem_exit_ns()
261 	idr_destroy(&ns->ids[IPC_SEM_IDS].ipcs_idr);  in sem_exit_ns()
262 	rhashtable_destroy(&ns->ids[IPC_SEM_IDS].key_ht);  in sem_exit_ns()
475 static inline struct sem_array *sem_obtain_object(struct ipc_namespace *ns, int id)  in sem_obtain_object()  argument
477 	struct kern_ipc_perm *ipcp = ipc_obtain_object_idr(&sem_ids(ns), id);  in sem_obtain_object()
485 static inline struct sem_array *sem_obtain_object_check(struct ipc_namespace *ns,  in sem_obtain_object_check()  argument
488 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&sem_ids(ns), id);  in sem_obtain_object_check()
502 static inline void sem_rmid(struct ipc_namespace *ns, struct sem_array *s)  in sem_rmid()  argument
504 	ipc_rmid(&sem_ids(ns), &s->sem_perm);  in sem_rmid()
528 static int newary(struct ipc_namespace *ns, struct ipc_params *params)  in newary()  argument
539 	if (ns->used_sems + nsems > ns->sc_semmns)  in newary()
571 	retval = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);  in newary()
576 	ns->used_sems += nsems;  in newary()
601 	struct ipc_namespace *ns;  in ksys_semget()  local
609 	ns = current->nsproxy->ipc_ns;  in ksys_semget()
611 	if (nsems < 0 || nsems > ns->sc_semmsl)  in ksys_semget()
618 	return ipcget(ns, &sem_ids(ns), &sem_ops, &sem_params);  in ksys_semget()
1141 static void freeary(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)  in freeary()  argument
1184 	sem_rmid(ns, sma);  in freeary()
1189 	ns->used_sems -= sma->sem_nsems;  in freeary()
1232 static int semctl_stat(struct ipc_namespace *ns, int semid,  in semctl_stat()  argument
1243 		sma = sem_obtain_object(ns, semid);  in semctl_stat()
1249 		sma = sem_obtain_object_check(ns, semid);  in semctl_stat()
1261 		if (ipcperms(ns, &sma->sem_perm, S_IRUGO))  in semctl_stat()
1306 static int semctl_info(struct ipc_namespace *ns, int semid,  in semctl_info()  argument
1318 	seminfo.semmni = ns->sc_semmni;  in semctl_info()
1319 	seminfo.semmns = ns->sc_semmns;  in semctl_info()
1320 	seminfo.semmsl = ns->sc_semmsl;  in semctl_info()
1321 	seminfo.semopm = ns->sc_semopm;  in semctl_info()
1326 	down_read(&sem_ids(ns).rwsem);  in semctl_info()
1328 		seminfo.semusz = sem_ids(ns).in_use;  in semctl_info()
1329 		seminfo.semaem = ns->used_sems;  in semctl_info()
1334 	max_idx = ipc_get_maxidx(&sem_ids(ns));  in semctl_info()
1335 	up_read(&sem_ids(ns).rwsem);  in semctl_info()
1341 static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,  in semctl_setval()  argument
1354 	sma = sem_obtain_object_check(ns, semid);  in semctl_setval()
1366 	if (ipcperms(ns, &sma->sem_perm, S_IWUGO)) {  in semctl_setval()
1403 static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,  in semctl_main()  argument
1414 	sma = sem_obtain_object_check(ns, semid);  in semctl_main()
1423 	if (ipcperms(ns, &sma->sem_perm, cmd == SETALL ? S_IWUGO : S_IRUGO))  in semctl_main()
1600 static int semctl_down(struct ipc_namespace *ns, int semid,  in semctl_down()  argument
1607 	down_write(&sem_ids(ns).rwsem);  in semctl_down()
1610 	ipcp = ipcctl_obtain_check(ns, &sem_ids(ns), semid, cmd,  in semctl_down()
1627 		freeary(ns, ipcp);  in semctl_down()
1646 	up_write(&sem_ids(ns).rwsem);  in semctl_down()
1652 	struct ipc_namespace *ns;  in ksys_semctl()  local
1660 	ns = current->nsproxy->ipc_ns;  in ksys_semctl()
1665 		return semctl_info(ns, semid, cmd, p);  in ksys_semctl()
1669 		err = semctl_stat(ns, semid, cmd, &semid64);  in ksys_semctl()
1681 		return semctl_main(ns, semid, semnum, cmd, p);  in ksys_semctl()
1691 		return semctl_setval(ns, semid, semnum, val);  in ksys_semctl()
1698 		return semctl_down(ns, semid, cmd, &semid64);  in ksys_semctl()
1776 	struct ipc_namespace *ns;  in compat_ksys_semctl()  local
1780 	ns = current->nsproxy->ipc_ns;  in compat_ksys_semctl()
1788 		return semctl_info(ns, semid, cmd, p);  in compat_ksys_semctl()
1792 		err = semctl_stat(ns, semid, cmd, &semid64);  in compat_ksys_semctl()
1804 		return semctl_main(ns, semid, semnum, cmd, p);  in compat_ksys_semctl()
1806 		return semctl_setval(ns, semid, semnum, arg);  in compat_ksys_semctl()
1812 		return semctl_down(ns, semid, cmd, &semid64);  in compat_ksys_semctl()
1905 static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid)  in find_alloc_undo()  argument
1925 	sma = sem_obtain_object_check(ns, semid);  in find_alloc_undo()
1995 	struct ipc_namespace *ns;  in do_semtimedop()  local
1997 	ns = current->nsproxy->ipc_ns;  in do_semtimedop()
2001 	if (nsops > ns->sc_semopm)  in do_semtimedop()
2048 		un = find_alloc_undo(ns, semid);  in do_semtimedop()
2058 	sma = sem_obtain_object_check(ns, semid);  in do_semtimedop()
2072 	if (ipcperms(ns, &sma->sem_perm, alter ? S_IWUGO : S_IRUGO)) {  in do_semtimedop()