Ejemplo n.º 1
0
static void shm_rcu_free(struct rcu_head *head)
{
	struct ipc_rcu *p = container_of(head, struct ipc_rcu, rcu);
	struct shmid_kernel *shp = ipc_rcu_to_struct(p);

	security_shm_free(shp);
	ipc_rcu_free(head);
}
Ejemplo n.º 2
0
static int newque (key_t key, int msgflg)
{
	int id;
	int retval;
	struct msg_queue *msq;

	msq  = ipc_rcu_alloc(sizeof(*msq));
	if (!msq) 
		return -ENOMEM;

	msq->q_perm.mode = (msgflg & S_IRWXUGO);
	msq->q_perm.key = key;

	msq->q_perm.security = NULL;
	retval = security_msg_queue_alloc(msq);
	if (retval) {
		ipc_rcu_free(msq, sizeof(*msq));
		return retval;
	}

	id = ipc_addid(&msg_ids, &msq->q_perm, msg_ctlmni);
	if(id == -1) {
		security_msg_queue_free(msq);
		ipc_rcu_free(msq, sizeof(*msq));
		return -ENOSPC;
	}

	msq->q_stime = msq->q_rtime = 0;
	msq->q_ctime = get_seconds();
	msq->q_cbytes = msq->q_qnum = 0;
	msq->q_qbytes = msg_ctlmnb;
	msq->q_lspid = msq->q_lrpid = 0;
	INIT_LIST_HEAD(&msq->q_messages);
	INIT_LIST_HEAD(&msq->q_receivers);
	INIT_LIST_HEAD(&msq->q_senders);
	msg_unlock(msq);

	return msg_buildid(id,msq->q_perm.seq);
}
Ejemplo n.º 3
0
/* 
 * freeque() wakes up waiters on the sender and receiver waiting queue, 
 * removes the message queue from message queue ID 
 * array, and cleans up all the messages associated with this queue.
 *
 * msg_ids.sem and the spinlock for this message queue is hold
 * before freeque() is called. msg_ids.sem remains locked on exit.
 */
static void freeque (struct msg_queue *msq, int id)
{
	struct list_head *tmp;

	expunge_all(msq,-EIDRM);
	ss_wakeup(&msq->q_senders,1);
	msq = msg_rmid(id);
	msg_unlock(msq);
		
	tmp = msq->q_messages.next;
	while(tmp != &msq->q_messages) {
		struct msg_msg* msg = list_entry(tmp,struct msg_msg,m_list);
		tmp = tmp->next;
		atomic_dec(&msg_hdrs);
		free_msg(msg);
	}
	atomic_sub(msq->q_cbytes, &msg_bytes);
	security_msg_queue_free(msq);
	ipc_rcu_free(msq, sizeof(struct msg_queue));
}