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-rw-r--r--ipc/ipcns_notifier.c92
1 files changed, 0 insertions, 92 deletions
diff --git a/ipc/ipcns_notifier.c b/ipc/ipcns_notifier.c
deleted file mode 100644
index b9b31a4f77e1..000000000000
--- a/ipc/ipcns_notifier.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * linux/ipc/ipcns_notifier.c
- * Copyright (C) 2007 BULL SA. Nadia Derbey
- *
- * Notification mechanism for ipc namespaces:
- * The callback routine registered in the memory chain invokes the ipcns
- * notifier chain with the IPCNS_MEMCHANGED event.
- * Each callback routine registered in the ipcns namespace recomputes msgmni
- * for the owning namespace.
- */
-
-#include <linux/msg.h>
-#include <linux/rcupdate.h>
-#include <linux/notifier.h>
-#include <linux/nsproxy.h>
-#include <linux/ipc_namespace.h>
-
-#include "util.h"
-
-
-
-static BLOCKING_NOTIFIER_HEAD(ipcns_chain);
-
-
-static int ipcns_callback(struct notifier_block *self,
- unsigned long action, void *arg)
-{
- struct ipc_namespace *ns;
-
- switch (action) {
- case IPCNS_MEMCHANGED: /* amount of lowmem has changed */
- case IPCNS_CREATED:
- case IPCNS_REMOVED:
- /*
- * It's time to recompute msgmni
- */
- ns = container_of(self, struct ipc_namespace, ipcns_nb);
- /*
- * 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)
-{
- int rc;
-
- memset(&ns->ipcns_nb, 0, sizeof(ns->ipcns_nb));
- ns->ipcns_nb.notifier_call = ipcns_callback;
- ns->ipcns_nb.priority = IPCNS_CALLBACK_PRI;
- rc = blocking_notifier_chain_register(&ipcns_chain, &ns->ipcns_nb);
- if (!rc)
- ns->auto_msgmni = 1;
- return rc;
-}
-
-int cond_register_ipcns_notifier(struct ipc_namespace *ns)
-{
- int rc;
-
- memset(&ns->ipcns_nb, 0, sizeof(ns->ipcns_nb));
- ns->ipcns_nb.notifier_call = ipcns_callback;
- ns->ipcns_nb.priority = IPCNS_CALLBACK_PRI;
- rc = blocking_notifier_chain_cond_register(&ipcns_chain,
- &ns->ipcns_nb);
- if (!rc)
- ns->auto_msgmni = 1;
- return rc;
-}
-
-void unregister_ipcns_notifier(struct ipc_namespace *ns)
-{
- blocking_notifier_chain_unregister(&ipcns_chain, &ns->ipcns_nb);
- ns->auto_msgmni = 0;
-}
-
-int ipcns_notify(unsigned long val)
-{
- return blocking_notifier_call_chain(&ipcns_chain, val, NULL);
-}