diff options
author | 2016-12-21 12:45:47 +0200 | |
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committer | 2016-12-21 17:50:42 +0000 | |
commit | fff67c89c5135263989c48b9ed923eb785efa67e (patch) | |
tree | baa33d7f49c49cbe18b8937b746155b102118d26 /vnet | |
parent | 4348c85b3da576936dd99e0ac6b56921dd7fd9e9 (diff) |
Support multiple VXLAN tunnels with same mcast dst
Support multiple vni's with the same group(multicast) address.
Implemented by sharing local adj. and rewrite among tunnels.
Change-Id: I8ca036b87af65dd6a8f1aff7da1855f72b4c8f4b
Signed-off-by: Eyal Bari <ebari@cisco.com>
Diffstat (limited to 'vnet')
-rw-r--r-- | vnet/vnet/vxlan/vxlan.c | 179 | ||||
-rw-r--r-- | vnet/vnet/vxlan/vxlan.h | 16 |
2 files changed, 121 insertions, 74 deletions
diff --git a/vnet/vnet/vxlan/vxlan.c b/vnet/vnet/vxlan/vxlan.c index 894cc3dc..abf0182f 100644 --- a/vnet/vnet/vxlan/vxlan.c +++ b/vnet/vnet/vxlan/vxlan.c @@ -289,14 +289,72 @@ static int vxlan_check_decap_next(vxlan_main_t * vxm, u32 is_ip6, u32 decap_next return 0; } +static uword +vtep_addr_ref(ip46_address_t *ip) +{ + if (!ip46_address_is_ip4(ip)) + return 1; /* always create */ + uword *pvtep = hash_get (vxlan_main.vtep4, ip->ip4.as_u32); + if (pvtep) + return ++pvtep[0]; + hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1); + return 1; +} + +static uword +vtep_addr_unref(ip46_address_t *ip) +{ + if (!ip46_address_is_ip4(ip)) + return 0; /* alwways destroy */ + uword *pvtep = hash_get (vxlan_main.vtep4, ip->ip4.as_u32); + ASSERT(pvtep); + if (!(--pvtep[0])) + hash_unset (vxlan_main.vtep4, ip->ip4.as_u32); + return pvtep[0]; +} + +static +mcast_remote_t * +mcast_ep_get(ip46_address_t * ip) +{ + ASSERT(ip46_address_is_multicast(ip)); + uword * ep_idx = hash_get_mem (vxlan_main.mcast_ep_by_ip, ip); + ASSERT(ep_idx); + return pool_elt_at_index(vxlan_main.mcast_eps, *ep_idx); +} + +static void +mcast_ep_add(mcast_remote_t * new_ep) +{ + mcast_remote_t * ep; + + pool_get_aligned (vxlan_main.mcast_eps, ep, CLIB_CACHE_LINE_BYTES); + *ep = *new_ep; + hash_set_mem (vxlan_main.mcast_ep_by_ip, &ep->ip, ep - vxlan_main.mcast_eps); +} + +static void +mcast_ep_remove(mcast_remote_t * ep) +{ + hash_unset_mem (vxlan_main.mcast_ep_by_ip, &ep->ip); + pool_put (vxlan_main.mcast_eps, ep); +} + +static void +ip46_multicast_ethernet_address(u8 * ethernet_address, ip46_address_t * ip) { + if (ip46_address_is_ip4(ip)) + ip4_multicast_ethernet_address(ethernet_address, &ip->ip4); + else + ip6_multicast_ethernet_address(ethernet_address, ip->ip6.as_u32[0]); +} + int vnet_vxlan_add_del_tunnel (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp) { vxlan_main_t * vxm = &vxlan_main; vxlan_tunnel_t *t = 0; vnet_main_t * vnm = vxm->vnet_main; - vnet_hw_interface_t * hi; - uword * p, * pvtep; + uword * p; u32 hw_if_index = ~0; u32 sw_if_index = ~0; int rv; @@ -309,10 +367,6 @@ int vnet_vxlan_add_del_tunnel key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */ key4.vni = clib_host_to_net_u32 (a->vni << 8); p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64); - if (ip4_address_is_multicast (&a->dst.ip4)) - pvtep = hash_get (vxm->vtep4, a->dst.ip4.as_u32); - else - pvtep = hash_get (vxm->vtep4, a->src.ip4.as_u32); } else { @@ -320,7 +374,6 @@ int vnet_vxlan_add_del_tunnel key6.src.as_u64[1] = a->dst.ip6.as_u64[1]; key6.vni = clib_host_to_net_u32 (a->vni << 8); p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6); - pvtep = NULL; /* ip6 vxlan-bypass not yet implemented */ } if (a->is_add) @@ -368,21 +421,11 @@ int vnet_vxlan_add_del_tunnel } if (!is_ip6) - { - hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); - if (pvtep) - pvtep[0]++; - else - { - if (ip4_address_is_multicast (&a->dst.ip4)) - hash_set (vxm->vtep4, a->dst.ip4.as_u32, 1); - else - hash_set (vxm->vtep4, a->src.ip4.as_u32, 1); - } - } + hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); else hash_set_mem (vxm->vxlan6_tunnel_by_key, t->key6, t - vxm->tunnels); - + + vnet_hw_interface_t * hi; if (vec_len (vxm->free_vxlan_tunnel_hw_if_indices) > 0) { vnet_interface_main_t * im = &vnm->interface_main; @@ -441,6 +484,7 @@ int vnet_vxlan_add_del_tunnel * when the forwarding for the entry updates, and the tunnel can * re-stack accordingly */ + vtep_addr_ref(&t->src); t->fib_entry_index = fib_table_entry_special_add (t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE, ADJ_INDEX_INVALID); @@ -448,41 +492,41 @@ int vnet_vxlan_add_del_tunnel (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, t - vxm->tunnels); vxlan_tunnel_restack_dpo(t); } - else if (pvtep == NULL) + else { /* Multicast tunnel - * as the same mcast group can be used for mutiple mcast tunnels * with different VNIs, create the output fib adjecency only if * it does not already exist */ - fib_protocol_t fp; - u8 mcast_mac[6]; - if (!is_ip6) { - ip4_multicast_ethernet_address(mcast_mac, &t->dst.ip4); - fp = FIB_PROTOCOL_IP4; - } else { - ip6_multicast_ethernet_address(mcast_mac, t->dst.ip6.as_u32[0]); - fp = FIB_PROTOCOL_IP6; - } - t->mcast_adj_index = adj_rewrite_add_and_lock - (fp, fib_proto_to_link(fp), t->mcast_sw_if_index, mcast_mac); - - flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER; - - /* Stack mcast dst mac addr rewrite on encap */ - dpo_proto_t dproto = fib_proto_to_dpo(fp); + fib_protocol_t fp = (is_ip6) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4; dpo_id_t dpo = DPO_INVALID; + dpo_proto_t dproto = fib_proto_to_dpo(fp); - dpo_set (&dpo, DPO_ADJACENCY, dproto, t->mcast_adj_index); + if (vtep_addr_ref(&t->dst) == 1) + { + u8 mcast_mac[6]; + + ip46_multicast_ethernet_address(mcast_mac, &t->dst); + receive_dpo_add_or_lock(dproto, ~0, NULL, &dpo); + mcast_remote_t new_ep = { + .ip = t->dst, + .mcast_adj_index = adj_rewrite_add_and_lock + (fp, fib_proto_to_link(fp), a->mcast_sw_if_index, mcast_mac), + /* Add VRF local mcast adj. */ + .fib_entry_index = fib_table_entry_special_dpo_add + (t->encap_fib_index, &tun_dst_pfx, + FIB_SOURCE_SPECIAL, FIB_ENTRY_FLAG_NONE, &dpo) + }; + mcast_ep_add(&new_ep); + dpo_reset(&dpo); + } + /* Stack shared mcast dst mac addr rewrite on encap */ + dpo_set (&dpo, DPO_ADJACENCY, dproto, + mcast_ep_get(&t->dst)->mcast_adj_index); dpo_stack_from_node (encap_index, &t->next_dpo, &dpo); - dpo_reset(&dpo); - - /* Add local mcast adj. */ - receive_dpo_add_or_lock(dproto, ~0, NULL, &dpo); - t->fib_entry_index = fib_table_entry_special_dpo_add - (t->encap_fib_index, &tun_dst_pfx, - FIB_SOURCE_SPECIAL, FIB_ENTRY_FLAG_NONE, &dpo); - dpo_reset(&dpo); + dpo_reset (&dpo); + flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER; } /* Set vxlan tunnel output node */ @@ -505,39 +549,29 @@ int vnet_vxlan_add_del_tunnel vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0; + if (!is_ip6) + hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64); + else + { + hash_unset_mem (vxm->vxlan6_tunnel_by_key, t->key6); + clib_mem_free (t->key6); + } + if (!ip46_address_is_multicast(&t->dst)) { + vtep_addr_unref(&a->src); fib_entry_child_remove(t->fib_entry_index, t->sibling_index); fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_RR); - fib_node_deinit(&t->node); } - else if (pvtep == NULL || pvtep[0] == 1) + else if (vtep_addr_unref(&t->dst) == 0) { - adj_unlock(t->mcast_adj_index); - fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_SPECIAL); - fib_node_deinit(&t->node); + mcast_remote_t* ep = mcast_ep_get(&t->dst); + adj_unlock(ep->mcast_adj_index); + fib_table_entry_delete_index(ep->fib_entry_index, FIB_SOURCE_SPECIAL); + mcast_ep_remove(ep); } - if (!is_ip6) - { - hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64); - if (pvtep) - { - pvtep[0]--; - if (pvtep[0] == 0) - { - if (ip4_address_is_multicast (&a->dst.ip4)) - hash_unset (vxm->vtep4, a->dst.ip4.as_u32); - else - hash_unset (vxm->vtep4, a->src.ip4.as_u32); - } - } - } - else - { - hash_unset_mem (vxm->vxlan6_tunnel_by_key, t->key6); - clib_mem_free (t->key6); - } + fib_node_deinit(&t->node); vec_free (t->rewrite); pool_put (vxm->tunnels, t); } @@ -848,6 +882,9 @@ clib_error_t *vxlan_init (vlib_main_t *vm) vxm->vxlan6_tunnel_by_key = hash_create_mem(0, sizeof(vxlan6_tunnel_key_t), sizeof(uword)); + vxm->mcast_ep_by_ip = hash_create_mem(0, + sizeof(ip46_address_t), + sizeof(uword)); udp_register_dst_port (vm, UDP_DST_PORT_vxlan, vxlan4_input_node.index, /* is_ip4 */ 1); diff --git a/vnet/vnet/vxlan/vxlan.h b/vnet/vnet/vxlan/vxlan.h index f475bbac..7605d94a 100644 --- a/vnet/vnet/vxlan/vxlan.h +++ b/vnet/vnet/vxlan/vxlan.h @@ -138,18 +138,28 @@ typedef enum { } vxlan_input_error_t; typedef struct { + ip46_address_t ip; + fib_node_index_t fib_entry_index; + adj_index_t mcast_adj_index; +} mcast_remote_t; + +typedef struct { /* vector of encap tunnel instances */ - vxlan_tunnel_t *tunnels; + vxlan_tunnel_t * tunnels; /* lookup tunnel by key */ uword * vxlan4_tunnel_by_key; /* keyed on ipv4.dst + vni */ uword * vxlan6_tunnel_by_key; /* keyed on ipv6.dst + vni */ - /* local VTEP IPs used by vxlan-bypass node to check if received - VXLAN packet DIP matches any local VTEP address */ + /* local VTEP IPs ref count used by vxlan-bypass node to check if + received VXLAN packet DIP matches any local VTEP address */ uword * vtep4; /* local ip4 VTEPs keyed on their ip4 addr */ uword * vtep6; /* local ip6 VTEPs keyed on their ip6 addr */ + /* set of active remote mcast VTEP */ + mcast_remote_t * mcast_eps; + uword * mcast_ep_by_ip; /* mcast VTEPs keyed on their ip46 addr */ + /* Free vlib hw_if_indices */ u32 * free_vxlan_tunnel_hw_if_indices; |