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Diffstat (limited to 'kernel/utsname.c')
-rw-r--r--kernel/utsname.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/utsname.c b/kernel/utsname.c
index 44646179eaba..bff131b9510a 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/user_namespace.h>
+#include <linux/proc_fs.h>
static struct uts_namespace *create_uts_ns(void)
{
@@ -79,3 +80,41 @@ void free_uts_ns(struct kref *kref)
put_user_ns(ns->user_ns);
kfree(ns);
}
+
+static void *utsns_get(struct task_struct *task)
+{
+ struct uts_namespace *ns = NULL;
+ struct nsproxy *nsproxy;
+
+ rcu_read_lock();
+ nsproxy = task_nsproxy(task);
+ if (nsproxy) {
+ ns = nsproxy->uts_ns;
+ get_uts_ns(ns);
+ }
+ rcu_read_unlock();
+
+ return ns;
+}
+
+static void utsns_put(void *ns)
+{
+ put_uts_ns(ns);
+}
+
+static int utsns_install(struct nsproxy *nsproxy, void *ns)
+{
+ get_uts_ns(ns);
+ put_uts_ns(nsproxy->uts_ns);
+ nsproxy->uts_ns = ns;
+ return 0;
+}
+
+const struct proc_ns_operations utsns_operations = {
+ .name = "uts",
+ .type = CLONE_NEWUTS,
+ .get = utsns_get,
+ .put = utsns_put,
+ .install = utsns_install,
+};
+