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generated by cgit v1.2.3 (git 2.25.1) at 2024-08-28 12:43:56 +0000
 

an>
		 * No need to get a reference on the ns: the 1st job of
		 * free_ipc_ns() is to unregister the callback routine.
		 * blocking_notifier_chain_unregister takes the wr lock to do
		 * it.
		 * When this callback routine is called the rd lock is held by
		 * blocking_notifier_call_chain.
		 * So the ipc ns cannot be freed while we are here.
		 */
		recompute_msgmni(ns);
		break;
	default:
		break;
	}

	return NOTIFY_OK;
}

int register_ipcns_notifier(struct ipc_namespace *ns)
{
	memset(&ns->ipcns_nb, 0, sizeof(ns->ipcns_nb));
	ns->ipcns_nb.notifier_call = ipcns_callback;
	ns->ipcns_nb.priority = IPCNS_CALLBACK_PRI;
	return blocking_notifier_chain_register(&ipcns_chain, &ns->ipcns_nb);
}

int cond_register_ipcns_notifier(struct ipc_namespace *ns)
{
	memset(&ns->ipcns_nb, 0, sizeof(ns->ipcns_nb));
	ns->ipcns_nb.notifier_call = ipcns_callback;
	ns->ipcns_nb.priority = IPCNS_CALLBACK_PRI;
	return blocking_notifier_chain_cond_register(&ipcns_chain,
							&ns->ipcns_nb);
}

int unregister_ipcns_notifier(struct ipc_namespace *ns)
{
	return blocking_notifier_chain_unregister(&ipcns_chain,
						&ns->ipcns_nb);
}

int ipcns_notify(unsigned long val)
{
	return blocking_notifier_call_chain(&ipcns_chain, val, NULL);
}