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authorEric W. Biederman <ebiederm@xmission.com>2010-03-07 18:48:39 -0800
committerEric W. Biederman <ebiederm@xmission.com>2011-05-10 14:35:47 -0700
commita00eaf11a223c63fbb212369d6db69ce4c55a2d1 (patch)
tree1c38d8591c229243cb09386a0f5b3737da421cf1 /ipc
parent34482e89a5218f0f9317abf1cfba3bb38b5c29dd (diff)
downloadlinux-stericsson-a00eaf11a223c63fbb212369d6db69ce4c55a2d1.tar.gz
ns proc: Add support for the ipc namespace
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/namespace.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 8054c8e5faf1..ce0a647869b1 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,
+};