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Diffstat (limited to 'ipc/namespace.c')
-rw-r--r--ipc/namespace.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 8054c8e5faf..ce0a647869b 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -12,6 +12,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/user_namespace.h>
+#include <linux/proc_fs.h>
#include "util.h"
@@ -140,3 +141,39 @@ void put_ipc_ns(struct ipc_namespace *ns)
free_ipc_ns(ns);
}
}
+
+static void *ipcns_get(struct task_struct *task)
+{
+ struct ipc_namespace *ns = NULL;
+ struct nsproxy *nsproxy;
+
+ rcu_read_lock();
+ nsproxy = task_nsproxy(task);
+ if (nsproxy)
+ ns = get_ipc_ns(nsproxy->ipc_ns);
+ rcu_read_unlock();
+
+ return ns;
+}
+
+static void ipcns_put(void *ns)
+{
+ return put_ipc_ns(ns);
+}
+
+static int ipcns_install(struct nsproxy *nsproxy, void *ns)
+{
+ /* Ditch state from the old ipc namespace */
+ exit_sem(current);
+ put_ipc_ns(nsproxy->ipc_ns);
+ nsproxy->ipc_ns = get_ipc_ns(ns);
+ return 0;
+}
+
+const struct proc_ns_operations ipcns_operations = {
+ .name = "ipc",
+ .type = CLONE_NEWIPC,
+ .get = ipcns_get,
+ .put = ipcns_put,
+ .install = ipcns_install,
+};