- bn = LIST_NEXT(bc, next);
- if (bc->size) {
- flow_tcf_setack_nlcmd(bc);
- nlh = (struct nlmsghdr *)&bc->msg;
- rc = flow_tcf_nl_ack(tcf, nlh, bc->size, NULL, NULL);
- if (rc && !ret)
- ret = rc;
+ while (msg < bc->size) {
+ /*
+ * Send Netlink commands from buffer in one by one
+ * fashion. If we send multiple rule deletion commands
+ * in one Netlink message and some error occurs it may
+ * cause multiple ACK error messages and break sequence
+ * numbers of Netlink communication, because we expect
+ * the only one ACK reply.
+ */
+ assert((bc->size - msg) >= sizeof(struct nlmsghdr));
+ nlh = (struct nlmsghdr *)&bc->msg[msg];
+ assert((bc->size - msg) >= nlh->nlmsg_len);
+ msg += nlh->nlmsg_len;
+ rc = flow_tcf_nl_ack(tcf, nlh, 0, NULL, NULL);
+ if (rc) {
+ DRV_LOG(WARNING,
+ "netlink: cleanup error %d", rc);
+ if (!ret)
+ ret = rc;
+ }