+
+ /*
+ * The legacy version 6 binary mount data from userspace has a
+ * field used only to transport selinux information into the
+ * the kernel. To continue to support that functionality we
+ * have a touch of selinux knowledge here in the NFS code. The
+ * userspace code converted context=blah to just blah so we are
+ * converting back to the full string selinux understands.
+ */
+ if (data->context[0]){
+#ifdef CONFIG_SECURITY_SELINUX
+ int rc;
+ char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL);
+ if (!opts_str)
+ return -ENOMEM;
+ strcpy(opts_str, "context=");
+ data->context[NFS_MAX_CONTEXT_LEN] = '\0';
+ strcat(opts_str, &data->context[0]);
+ rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts);
+ kfree(opts_str);
+ if (rc)
+ return rc;
+#else
+ return -EINVAL;
+#endif
+ }
+