1 files changed, 18 insertions, 0 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index bcf310c8b784..2f9950e43911 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -190,6 +190,23 @@ smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
         return 0;
 }
 
+static char *
+smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
+                        struct cifs_tcon *tcon)
+{
+        int pplen = vol->prepath ? strlen(vol->prepath) : 0;
+        char *full_path = NULL;
+
+        /* if no prefix path, simply set path to the root of share to "" */
+        if (pplen == 0) {
+                full_path = kzalloc(2, GFP_KERNEL);
+                return full_path;
+        }
+
+        cERROR(1, "prefixpath is not supported for SMB2 now");
+        return NULL;
+}
+
 struct smb_version_operations smb21_operations = {
         .setup_request = smb2_setup_request,
         .check_receive = smb2_check_receive,
@@ -210,6 +227,7 @@ struct smb_version_operations smb21_operations = {
         .is_path_accessible = smb2_is_path_accessible,
         .query_path_info = smb2_query_path_info,
         .get_srv_inum = smb2_get_srv_inum,
+        .build_path_to_root = smb2_build_path_to_root,
 };
 
 struct smb_version_values smb21_values = {