70 	int ids;  member
100 void ipc_init_ids(struct ipc_ids *ids)  in ipc_init_ids()  argument
102 	ids->in_use = 0;  in ipc_init_ids()
103 	ids->seq = 0;  in ipc_init_ids()
104 	ids->next_id = -1;  in ipc_init_ids()
105 	init_rwsem(&ids->rwsem);  in ipc_init_ids()
106 	idr_init(&ids->ipcs_idr);  in ipc_init_ids()
119 		int ids, int (*show)(struct seq_file *, void *))  in ipc_init_proc_interface()  argument
129 	iface->ids	= ids;  in ipc_init_proc_interface()
152 static struct kern_ipc_perm *ipc_findkey(struct ipc_ids *ids, key_t key)  in ipc_findkey()  argument
158 	for (total = 0, next_id = 0; total < ids->in_use; next_id++) {  in ipc_findkey()
159 		ipc = idr_find(&ids->ipcs_idr, next_id);  in ipc_findkey()
183 int ipc_get_maxid(struct ipc_ids *ids)  in ipc_get_maxid()  argument
189 	if (ids->in_use == 0)  in ipc_get_maxid()
192 	if (ids->in_use == IPCMNI)  in ipc_get_maxid()
197 	for (id = 0; id < IPCMNI && total < ids->in_use; id++) {  in ipc_get_maxid()
198 		ipc = idr_find(&ids->ipcs_idr, id);  in ipc_get_maxid()
220 int ipc_addid(struct ipc_ids *ids, struct kern_ipc_perm *new, int size)  in ipc_addid()  argument
225 	int next_id = ids->next_id;  in ipc_addid()
230 	if (ids->in_use >= size)  in ipc_addid()
244 	id = idr_alloc(&ids->ipcs_idr, new,  in ipc_addid()
254 	ids->in_use++;  in ipc_addid()
257 		new->seq = ids->seq++;  in ipc_addid()
258 		if (ids->seq > IPCID_SEQ_MAX)  in ipc_addid()
259 			ids->seq = 0;  in ipc_addid()
262 		ids->next_id = -1;  in ipc_addid()
279 static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,  in ipcget_new()  argument
284 	down_write(&ids->rwsem);  in ipcget_new()
286 	up_write(&ids->rwsem);  in ipcget_new()
337 static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,  in ipcget_public()  argument
348 	down_write(&ids->rwsem);  in ipcget_public()
349 	ipcp = ipc_findkey(ids, params->key);  in ipcget_public()
374 	up_write(&ids->rwsem);  in ipcget_public()
388 void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp)  in ipc_rmid()  argument
392 	idr_remove(&ids->ipcs_idr, lid);  in ipc_rmid()
393 	ids->in_use--;  in ipc_rmid()
558 struct kern_ipc_perm *ipc_obtain_object_idr(struct ipc_ids *ids, int id)  in ipc_obtain_object_idr()  argument
563 	out = idr_find(&ids->ipcs_idr, lid);  in ipc_obtain_object_idr()
579 struct kern_ipc_perm *ipc_lock(struct ipc_ids *ids, int id)  in ipc_lock()  argument
584 	out = ipc_obtain_object_idr(ids, id);  in ipc_lock()
617 struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id)  in ipc_obtain_object_check()  argument
619 	struct kern_ipc_perm *out = ipc_obtain_object_idr(ids, id);  in ipc_obtain_object_check()
640 int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,  in ipcget()  argument
644 		return ipcget_new(ns, ids, ops, params);  in ipcget()
646 		return ipcget_public(ns, ids, ops, params);  in ipcget()
688 					struct ipc_ids *ids, int id, int cmd,  in ipcctl_pre_down_nolock()  argument
695 	ipcp = ipc_obtain_object_check(ids, id);  in ipcctl_pre_down_nolock()
746 static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t pos,  in sysvipc_find_ipc()  argument
753 	for (id = 0; id < pos && total < ids->in_use; id++) {  in sysvipc_find_ipc()
754 		ipc = idr_find(&ids->ipcs_idr, id);  in sysvipc_find_ipc()
759 	if (total >= ids->in_use)  in sysvipc_find_ipc()
763 		ipc = idr_find(&ids->ipcs_idr, pos);  in sysvipc_find_ipc()
786 	return sysvipc_find_ipc(&iter->ns->ids[iface->ids], *pos, pos);  in sysvipc_proc_next()
797 	struct ipc_ids *ids;  in sysvipc_proc_start()  local
799 	ids = &iter->ns->ids[iface->ids];  in sysvipc_proc_start()
805 	down_read(&ids->rwsem);  in sysvipc_proc_start()
816 	return sysvipc_find_ipc(ids, *pos - 1, pos);  in sysvipc_proc_start()
824 	struct ipc_ids *ids;  in sysvipc_proc_stop()  local
830 	ids = &iter->ns->ids[iface->ids];  in sysvipc_proc_stop()
832 	up_read(&ids->rwsem);  in sysvipc_proc_stop()