return 0;
}
+
+static const char *port_state2str(uint8_t state)
+{
+ switch (state) {
+ case BR_STATE_DISABLED:
+ return "DISABLED";
+ case BR_STATE_LISTENING:
+ return "LISTENING";
+ case BR_STATE_LEARNING:
+ return "LEARNING";
+ case BR_STATE_FORWARDING:
+ return "FORWARDING";
+ case BR_STATE_BLOCKING:
+ return "BLOCKING";
+ }
+
+ return "UNKNOWN";
+}
+
+static void vxlan_vni_state_change(struct zebra_if *zif, uint16_t id,
+ uint8_t state)
+{
+ struct zebra_vxlan_vni *vnip;
+
+ vnip = zebra_vxlan_if_vlanid_vni_find(zif, id);
+
+ if (!vnip) {
+ if (IS_ZEBRA_DEBUG_VXLAN)
+ zlog_debug(
+ "Cannot find VNI for VID (%u) IF %s for vlan state update",
+ id, zif->ifp->name);
+
+ return;
+ }
+
+ switch (state) {
+ case BR_STATE_FORWARDING:
+ zebra_vxlan_if_vni_up(zif->ifp, vnip);
+ break;
+ case BR_STATE_BLOCKING:
+ zebra_vxlan_if_vni_down(zif->ifp, vnip);
+ break;
+ case BR_STATE_DISABLED:
+ case BR_STATE_LISTENING:
+ case BR_STATE_LEARNING:
+ default:
+ /* Not used for anything at the moment */
+ break;
+ }
+}
+
+static void vlan_id_range_state_change(struct interface *ifp, uint16_t id_start,
+ uint16_t id_end, uint8_t state)
+{
+ struct zebra_if *zif;
+
+ zif = (struct zebra_if *)ifp->info;
+
+ if (!zif)
+ return;
+
+ for (uint16_t i = id_start; i <= id_end; i++)
+ vxlan_vni_state_change(zif, i, state);
+}
+
+/**
+ * netlink_vlan_change() - Read in change about vlans from the kernel
+ *
+ * @h: Netlink message header
+ * @ns_id: Namspace id
+ * @startup: Are we reading under startup conditions?
+ *
+ * Return: Result status
+ */
+int netlink_vlan_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
+{
+ int len, rem;
+ struct interface *ifp;
+ struct br_vlan_msg *bvm;
+ struct bridge_vlan_info *vinfo;
+ struct rtattr *vtb[BRIDGE_VLANDB_ENTRY_MAX + 1] = {};
+ struct rtattr *attr;
+ uint8_t state;
+ uint32_t vrange;
+ int type;
+
+ /* We only care about state changes for now */
+ if (!(h->nlmsg_type == RTM_NEWVLAN))
+ return 0;
+
+ len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct br_vlan_msg));
+ if (len < 0) {
+ zlog_warn(
+ "%s: Message received from netlink is of a broken size %d %zu",
+ __func__, h->nlmsg_len,
+ (size_t)NLMSG_LENGTH(sizeof(struct br_vlan_msg)));
+ return -1;
+ }
+
+ bvm = NLMSG_DATA(h);
+
+ if (bvm->family != AF_BRIDGE)
+ return 0;
+
+ ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), bvm->ifindex);
+ if (!ifp) {
+ zlog_debug("Cannot find bridge-vlan IF (%u) for vlan update",
+ bvm->ifindex);
+ return 0;
+ }
+
+ if (!IS_ZEBRA_IF_VXLAN(ifp)) {
+ if (IS_ZEBRA_DEBUG_KERNEL)
+ zlog_debug("Ignoring non-vxlan IF (%s) for vlan update",
+ ifp->name);
+
+ return 0;
+ }
+
+ if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_VXLAN)
+ zlog_debug("%s %s IF %s NS %u",
+ nl_msg_type_to_str(h->nlmsg_type),
+ nl_family_to_str(bvm->family), ifp->name, ns_id);
+
+ /* Loop over "ALL" BRIDGE_VLANDB_ENTRY */
+ rem = len;
+ for (attr = BRVLAN_RTA(bvm); RTA_OK(attr, rem);
+ attr = RTA_NEXT(attr, rem)) {
+ vinfo = NULL;
+ state = 0;
+ vrange = 0;
+
+ type = attr->rta_type & NLA_TYPE_MASK;
+
+ if (type != BRIDGE_VLANDB_ENTRY)
+ continue;
+
+ /* Parse nested entry data */
+ netlink_parse_rtattr_nested(vtb, BRIDGE_VLANDB_ENTRY_MAX, attr);
+
+ /* It must have info for the ID */
+ if (!vtb[BRIDGE_VLANDB_ENTRY_INFO])
+ continue;
+
+ vinfo = (struct bridge_vlan_info *)RTA_DATA(
+ vtb[BRIDGE_VLANDB_ENTRY_INFO]);
+
+ /*
+ * We only care about state info, if there is none, just ignore
+ * it.
+ */
+ if (!vtb[BRIDGE_VLANDB_ENTRY_STATE])
+ continue;
+
+ state = *(uint8_t *)RTA_DATA(vtb[BRIDGE_VLANDB_ENTRY_STATE]);
+
+ if (vtb[BRIDGE_VLANDB_ENTRY_RANGE])
+ vrange = *(uint32_t *)RTA_DATA(
+ vtb[BRIDGE_VLANDB_ENTRY_RANGE]);
+
+ if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_VXLAN) {
+ if (vrange)
+ zlog_debug("VLANDB_ENTRY: VID (%u-%u) state=%s",
+ vinfo->vid, vrange,
+ port_state2str(state));
+ else
+ zlog_debug("VLANDB_ENTRY: VID (%u) state=%s",
+ vinfo->vid, port_state2str(state));
+ }
+
+ vlan_id_range_state_change(
+ ifp, vinfo->vid, (vrange ? vrange : vinfo->vid), state);
+ }
+
+ return 0;
+}
+
+/**
+ * netlink_request_vlan() - Request vlan information from the kernel
+ * @zns: Zebra namespace
+ * @family: AF_* netlink family
+ * @type: RTM_* type
+ *
+ * Return: Result status
+ */
+static int netlink_request_vlan(struct zebra_ns *zns, int family, int type)
+{
+ struct {
+ struct nlmsghdr n;
+ struct br_vlan_msg bvm;
+ char buf[256];
+ } req;
+
+ /* Form the request, specifying filter (rtattr) if needed. */
+ memset(&req, 0, sizeof(req));
+ req.n.nlmsg_type = type;
+ req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST;
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_vlan_msg));
+ req.bvm.family = family;
+
+ nl_attr_put32(&req.n, sizeof(req), BRIDGE_VLANDB_DUMP_FLAGS,
+ BRIDGE_VLANDB_DUMPF_STATS);
+
+ return netlink_request(&zns->netlink_cmd, &req);
+}
+
+/**
+ * netlink_vlan_read() - Vlan read function using netlink interface
+ *
+ * @zns: Zebra name space
+ *
+ * Return: Result status
+ * Only called at bootstrap time.
+ */
+int netlink_vlan_read(struct zebra_ns *zns)
+{
+ int ret;
+ struct zebra_dplane_info dp_info;
+
+ zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/);
+
+ /* Get bridg vlan info */
+ ret = netlink_request_vlan(zns, PF_BRIDGE, RTM_GETVLAN);
+ if (ret < 0)
+ return ret;
+
+ ret = netlink_parse_info(netlink_vlan_change, &zns->netlink_cmd,
+ &dp_info, 0, 1);
+
+ return ret;
+}
+
#endif /* GNU_LINUX */
projects / mirror_frr.git / commitdiff