[][kernel][common][hnat][Add event to delete HNAT entries of bond slave when physical link is down]
[Description]
Add event to delete HNAT entries of bond slave when physical link is down.
The NETDEV_GOING_DOWN event can only monitor the device is brough down
administratively(e.g., ifconfig <dev> down), the physical link layer
event cannot be monitor(e.g., cable unplugged), we add NETDEV_CHANGE
event to check if the bond slave device physical link state is down
and delete the HNAT entries.
Without this patch, the accelerated traffic of bond device would
not be directed to another bond device instantly if it's cable
is unplugged, and the traffic would get stuck.
[Release-log]
N/A
Change-Id: I9d5b29741f39c718a8e8e4f546ebd6cc0a4c6d9d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9548988
diff --git a/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c b/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
index 18f514c..f8ae4c7 100644
--- a/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
+++ b/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
@@ -184,6 +184,72 @@
return i;
}
+static void foe_clear_ethdev_bind_entries(struct net_device *dev)
+{
+ struct net_device *master_dev = dev;
+ const struct dsa_port *dp;
+ struct foe_entry *entry;
+ struct mtk_mac *mac;
+ bool match_dev = false;
+ int port_id, gmac;
+ u32 i, hash_index;
+ u32 dsa_tag;
+ u32 total = 0;
+
+ /* Get the master device if the device is slave device */
+ port_id = hnat_dsa_get_port(&master_dev);
+ mac = netdev_priv(master_dev);
+ gmac = HNAT_GMAC_FP(mac->id);
+
+ if (gmac < 0)
+ return;
+
+ if (port_id >= 0) {
+ dp = dsa_port_from_netdev(dev);
+ if (IS_ERR(dp))
+ return;
+
+ if (IS_DSA_TAG_PROTO_MXL862_8021Q(dp))
+ dsa_tag = port_id + BIT(11);
+ else
+ dsa_tag = BIT(port_id);
+ }
+
+ for (i = 0; i < CFG_PPE_NUM; i++) {
+ for (hash_index = 0; hash_index < hnat_priv->foe_etry_num; hash_index++) {
+ entry = hnat_priv->foe_table_cpu[i] + hash_index;
+ if (!entry_hnat_is_bound(entry))
+ continue;
+
+ match_dev = (IS_IPV4_GRP(entry)) ? entry->ipv4_hnapt.iblk2.dp == gmac :
+ entry->ipv6_5t_route.iblk2.dp == gmac;
+
+ if (match_dev && port_id >= 0) {
+ if (IS_DSA_TAG_PROTO_MXL862_8021Q(dp)) {
+ match_dev = (IS_IPV4_GRP(entry)) ?
+ entry->ipv4_hnapt.vlan1 == dsa_tag :
+ entry->ipv6_5t_route.vlan1 == dsa_tag;
+ } else {
+ match_dev = (IS_IPV4_GRP(entry)) ?
+ !!(entry->ipv4_hnapt.etype & dsa_tag) :
+ !!(entry->ipv6_5t_route.etype & dsa_tag);
+ }
+ }
+
+ if (match_dev) {
+ entry->bfib1.state = INVALID;
+ entry->bfib1.time_stamp =
+ readl((hnat_priv->fe_base + 0x0010)) & 0xFF;
+ total++;
+ }
+ }
+ }
+
+ /* clear HWNAT cache */
+ if (total > 0)
+ hnat_cache_ebl(1);
+}
+
void foe_clear_all_bind_entries(void)
{
int i, hash_index;
@@ -234,6 +300,17 @@
extif_set_dev(dev);
+ break;
+ case NETDEV_CHANGE:
+ /* Clear PPE entries if the slave of bond device physical link down */
+ if (!netif_is_bond_slave(dev) ||
+ (!IS_LAN_GRP(dev) && !IS_WAN(dev)))
+ break;
+
+ if (netif_carrier_ok(dev))
+ break;
+
+ foe_clear_ethdev_bind_entries(dev);
break;
case NETDEV_GOING_DOWN:
if (!get_wifi_hook_if_index_from_dev(dev))