1 files changed, 39 insertions, 1 deletions

diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index 01aaef1a77c5..5bb5e49ef4c3 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -368,7 +368,45 @@ out:
         putname(pname);
         return ret;
 }
-EXPORT_SYMBOL_GPL(bpf_obj_get_user);
+
+static struct bpf_prog *__get_prog_inode(struct inode *inode, enum bpf_prog_type type)
+{
+        struct bpf_prog *prog;
+        int ret = inode_permission(inode, MAY_READ | MAY_WRITE);
+        if (ret)
+                return ERR_PTR(ret);
+
+        if (inode->i_op == &bpf_map_iops)
+                return ERR_PTR(-EINVAL);
+        if (inode->i_op != &bpf_prog_iops)
+                return ERR_PTR(-EACCES);
+
+        prog = inode->i_private;
+
+        ret = security_bpf_prog(prog);
+        if (ret < 0)
+                return ERR_PTR(ret);
+
+        if (!bpf_prog_get_ok(prog, &type, false))
+                return ERR_PTR(-EINVAL);
+
+        return bpf_prog_inc(prog);
+}
+
+struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type)
+{
+        struct bpf_prog *prog;
+        struct path path;
+        int ret = kern_path(name, LOOKUP_FOLLOW, &path);
+        if (ret)
+                return ERR_PTR(ret);
+        prog = __get_prog_inode(d_backing_inode(path.dentry), type);
+        if (!IS_ERR(prog))
+                touch_atime(&path);
+        path_put(&path);
+        return prog;
+}
+EXPORT_SYMBOL(bpf_prog_get_type_path);
 
 static void bpf_evict_inode(struct inode *inode)
 {