1 files changed, 44 insertions, 0 deletions
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
new file mode 100644
index 000000000..0efc3e628
--- /dev/null
+++ b/include/linux/fs_struct.h
@@ -0,0 +1,44 @@
+#ifndef _LINUX_FS_STRUCT_H
+#define _LINUX_FS_STRUCT_H
+
+#include <linux/path.h>
+#include <linux/spinlock.h>
+#include <linux/seqlock.h>
+
+struct fs_struct {
+	int users;
+	spinlock_t lock;
+	seqcount_t seq;
+	int umask;
+	int in_exec;
+	struct path root, pwd;
+};
+
+extern struct kmem_cache *fs_cachep;
+
+extern void exit_fs(struct task_struct *);
+extern void set_fs_root(struct fs_struct *, const struct path *);
+extern void set_fs_pwd(struct fs_struct *, const struct path *);
+extern struct fs_struct *copy_fs_struct(struct fs_struct *);
+extern void free_fs_struct(struct fs_struct *);
+extern int unshare_fs_struct(void);
+
+static inline void get_fs_root(struct fs_struct *fs, struct path *root)
+{
+	spin_lock(&fs->lock);
+	*root = fs->root;
+	path_get(root);
+	spin_unlock(&fs->lock);
+}
+
+static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
+{
+	spin_lock(&fs->lock);
+	*pwd = fs->pwd;
+	path_get(pwd);
+	spin_unlock(&fs->lock);
+}
+
+extern bool current_chrooted(void);
+
+#endif /* _LINUX_FS_STRUCT_H */