+ err = cgw_parse_attr(nlh, &mod, CGW_TYPE_CAN_CAN, &ccgw, &limhops);
+ if (err < 0)
+ return err;
+
+ if (mod.uid) {
+
+ ASSERT_RTNL();
+
+ /* check for updating an existing job with identical uid */
+ hlist_for_each_entry(gwj, &cgw_list, list) {
+
+ if (gwj->mod.uid != mod.uid)
+ continue;
+
+ /* interfaces & filters must be identical */
+ if (memcmp(&gwj->ccgw, &ccgw, sizeof(ccgw)))
+ return -EINVAL;
+
+ /* update modifications with disabled softirq & quit */
+ local_bh_disable();
+ memcpy(&gwj->mod, &mod, sizeof(mod));
+ local_bh_enable();
+ return 0;
+ }
+ }
+
+ /* ifindex == 0 is not allowed for job creation */
+ if (!ccgw.src_idx || !ccgw.dst_idx)
+ return -ENODEV;
+