check in the original version of dde linux26.

1 files changed, 53 insertions, 0 deletions

diff --git a/libdde_linux26/contrib/include/linux/mnt_namespace.h b/libdde_linux26/contrib/include/linux/mnt_namespace.h
new file mode 100644
index 00000000..830bbcd4
--- /dev/null
+++ b/libdde_linux26/contrib/include/linux/mnt_namespace.h
@@ -0,0 +1,53 @@
+#ifndef _NAMESPACE_H_
+#define _NAMESPACE_H_
+#ifdef __KERNEL__
+
+#include <linux/mount.h>
+#include <linux/sched.h>
+#include <linux/nsproxy.h>
+#include <linux/seq_file.h>
+
+struct mnt_namespace {
+	atomic_t		count;
+	struct vfsmount *	root;
+	struct list_head	list;
+	wait_queue_head_t poll;
+	int event;
+};
+
+struct proc_mounts {
+	struct seq_file m; /* must be the first element */
+	struct mnt_namespace *ns;
+	struct path root;
+	int event;
+};
+
+extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
+		struct fs_struct *);
+extern void __put_mnt_ns(struct mnt_namespace *ns);
+
+static inline void put_mnt_ns(struct mnt_namespace *ns)
+{
+	if (atomic_dec_and_lock(&ns->count, &vfsmount_lock))
+		/* releases vfsmount_lock */
+		__put_mnt_ns(ns);
+}
+
+static inline void exit_mnt_ns(struct task_struct *p)
+{
+	struct mnt_namespace *ns = p->nsproxy->mnt_ns;
+	if (ns)
+		put_mnt_ns(ns);
+}
+
+static inline void get_mnt_ns(struct mnt_namespace *ns)
+{
+	atomic_inc(&ns->count);
+}
+
+extern const struct seq_operations mounts_op;
+extern const struct seq_operations mountinfo_op;
+extern const struct seq_operations mountstats_op;
+
+#endif
+#endif