+loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
+{
+ down(&filp->f_dentry->d_inode->i_sem);
+ switch (origin) {
+ case 1:
+ offset += filp->f_pos;
+ case 0:
+ if (offset >= 0)
+ break;
+ default:
+ offset = -EINVAL;
+ goto out;
+ }
+ if (offset != filp->f_pos) {
+ filp->f_pos = offset;
+ ((struct nfs_open_context *)filp->private_data)->dir_cookie = 0;
+ }
+out:
+ up(&filp->f_dentry->d_inode->i_sem);
+ return offset;
+}
+