cifs: fix expand_dfs_referral

Regression introduced in commit 724d9f1cfba.

Prior to that, expand_dfs_referral would regenerate the mount data string
and then call cifs_parse_mount_options to re-parse it (klunky, but it
worked). The above commit moved cifs_parse_mount_options out of cifs_mount,
so the re-parsing of the new mount options no longer occurred. Fix it by
making expand_dfs_referral re-parse the mount options.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5111769..6ec366f 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -65,6 +65,8 @@ static int ip_connect(struct TCP_Server_Info *server);
 static int generic_ip_connect(struct TCP_Server_Info *server);
 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
 static void cifs_prune_tlinks(struct work_struct *work);
+static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
+                                       const char *devname);
 
 /*
  * cifs tcp session reconnection
@@ -2830,12 +2832,9 @@ is_path_accessible(int xid, struct cifs_tcon *tcon,
        return rc;
 }
 
-void
-cifs_cleanup_volume_info(struct smb_vol *volume_info)
+static void
+cleanup_volume_info_contents(struct smb_vol *volume_info)
 {
-       if (!volume_info)
-               return;
-
        kfree(volume_info->username);
        kzfree(volume_info->password);
        kfree(volume_info->UNC);
@@ -2843,10 +2842,18 @@ cifs_cleanup_volume_info(struct smb_vol *volume_info)
        kfree(volume_info->domainname);
        kfree(volume_info->iocharset);
        kfree(volume_info->prepath);
+}
+
+void
+cifs_cleanup_volume_info(struct smb_vol *volume_info)
+{
+       if (!volume_info)
+               return;
+       cleanup_volume_info_contents(volume_info);
        kfree(volume_info);
-       return;
 }
 
+
 #ifdef CONFIG_CIFS_DFS_UPCALL
 /* build_path_to_root returns full path to root when
  * we do not have an exiting connection (tcon) */
@@ -2915,15 +2922,18 @@ expand_dfs_referral(int xid, struct cifs_ses *pSesInfo,
                                                   &fake_devname);
 
                free_dfs_info_array(referrals, num_referrals);
-               kfree(fake_devname);
-
-               if (cifs_sb->mountdata != NULL)
-                       kfree(cifs_sb->mountdata);
 
                if (IS_ERR(mdata)) {
                        rc = PTR_ERR(mdata);
                        mdata = NULL;
+               } else {
+                       cleanup_volume_info_contents(volume_info);
+                       memset(volume_info, '\0', sizeof(*volume_info));
+                       rc = cifs_setup_volume_info(volume_info, mdata,
+                                                       fake_devname);
                }
+               kfree(fake_devname);
+               kfree(cifs_sb->mountdata);
                cifs_sb->mountdata = mdata;
        }
        kfree(full_path);