X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fplugins%2Fgbp%2Fgbp_policy.c;h=174223e09f7a8ee2e3452dd0840af78c500c12c4;hp=38254644631fa92d14e32fc41fbcf713f1eeb247;hb=1c17e2e;hpb=22b3b846822df2701bb6cb508fa4e023526e5717 diff --git a/src/plugins/gbp/gbp_policy.c b/src/plugins/gbp/gbp_policy.c index 38254644631..174223e09f7 100644 --- a/src/plugins/gbp/gbp_policy.c +++ b/src/plugins/gbp/gbp_policy.c @@ -14,6 +14,9 @@ */ #include +#include + +#include /** * Grouping of global data for the GBP source EPG classification feature @@ -23,7 +26,7 @@ typedef struct gbp_policy_main_t_ /** * Next nodes for L2 output features */ - u32 l2_output_feat_next[32]; + u32 l2_output_feat_next[2][32]; } gbp_policy_main_t; static gbp_policy_main_t gbp_policy_main; @@ -59,14 +62,67 @@ typedef enum typedef struct gbp_policy_trace_t_ { /* per-pkt trace data */ - epg_id_t src_epg; - epg_id_t dst_epg; + u32 src_epg; + u32 dst_epg; u32 acl_index; + u32 allowed; } gbp_policy_trace_t; +always_inline dpo_proto_t +ethertype_to_dpo_proto (u16 etype) +{ + etype = clib_net_to_host_u16 (etype); + + switch (etype) + { + case ETHERNET_TYPE_IP4: + return (DPO_PROTO_IP4); + case ETHERNET_TYPE_IP6: + return (DPO_PROTO_IP6); + } + + return (DPO_PROTO_NONE); +} + +always_inline u32 +gbp_rule_l2_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0) +{ + const ethernet_header_t *eth0; + const dpo_id_t *dpo; + dpo_proto_t dproto; + + eth0 = vlib_buffer_get_current (b0); + /* pop the ethernet header to prepare for L3 rewrite */ + vlib_buffer_advance (b0, vnet_buffer (b0)->l2.l2_len); + + dproto = ethertype_to_dpo_proto (eth0->type); + dpo = &gu->gu_dpo[GBP_POLICY_NODE_L2][dproto]; + + /* save the LB index for the next node and reset the IP flow hash + * so it's recalculated */ + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index; + vnet_buffer (b0)->ip.flow_hash = 0; + + return (dpo->dpoi_next_node); +} + +always_inline u8 +gbp_policy_is_ethertype_allowed (const gbp_contract_t * gc0, u16 ethertype) +{ + u16 *et; + + vec_foreach (et, gc0->gc_allowed_ethertypes) + { + if (*et == ethertype) + return (1); + } + return (0); +} + static uword -gbp_policy (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) +gbp_policy_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, u8 is_port_based) { gbp_main_t *gm = &gbp_main; gbp_policy_main_t *gpm = &gbp_policy_main; @@ -85,14 +141,16 @@ gbp_policy (vlib_main_t * vm, while (n_left_from > 0 && n_left_to_next > 0) { + const ethernet_header_t *h0; + const gbp_endpoint_t *ge0; + const gbp_contract_t *gc0; gbp_policy_next_t next0; gbp_contract_key_t key0; - gbp_contract_value_t value0 = { - .as_u64 = ~0, - }; u32 bi0, sw_if_index0; vlib_buffer_t *b0; + index_t gci0; + gc0 = NULL; next0 = GBP_POLICY_NEXT_DENY; bi0 = from[0]; to_next[0] = bi0; @@ -102,68 +160,143 @@ gbp_policy (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); + h0 = vlib_buffer_get_current (b0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; + /* + * If the A0bit is set then policy has already been applied + * and we skip enforcement here. + */ + if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A) + { + next0 = vnet_l2_feature_next (b0, + gpm->l2_output_feat_next + [is_port_based], + (is_port_based ? + L2OUTPUT_FEAT_GBP_POLICY_PORT : + L2OUTPUT_FEAT_GBP_POLICY_MAC)); + key0.as_u32 = ~0; + goto trace; + } /* * determine the src and dst EPG */ - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - key0.gck_dst = gbp_port_to_epg (sw_if_index0); + if (is_port_based) + ge0 = gbp_endpoint_find_itf (sw_if_index0); + else + ge0 = gbp_endpoint_find_mac (h0->dst_address, + vnet_buffer (b0)->l2.bd_index); + + if (NULL != ge0) + key0.gck_dst = ge0->ge_fwd.gef_epg_id; + else + /* If you cannot determine the destination EP then drop */ + goto trace; + key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg; - if (~0 != key0.gck_src) + if (EPG_INVALID != key0.gck_src) { if (PREDICT_FALSE (key0.gck_src == key0.gck_dst)) { /* * intra-epg allowed */ - next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next, - L2OUTPUT_FEAT_GBP_POLICY); + next0 = + vnet_l2_feature_next (b0, + gpm->l2_output_feat_next + [is_port_based], + (is_port_based ? + L2OUTPUT_FEAT_GBP_POLICY_PORT : + L2OUTPUT_FEAT_GBP_POLICY_MAC)); + vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A; } else { - value0.as_u64 = gbp_acl_lookup (&key0); + gci0 = gbp_contract_find (&key0); - if (~0 != value0.gc_lc_index) + if (INDEX_INVALID != gci0) { + u32 rule_match_p0, trace_bitmap0; fa_5tuple_opaque_t pkt_5tuple0; - u8 action0 = 0; u32 acl_pos_p0, acl_match_p0; - u32 rule_match_p0, trace_bitmap0; - u8 *h0, l2_len0; + u8 is_ip60, l2_len0, action0; + const gbp_rule_t *gu; u16 ether_type0; - u8 is_ip60 = 0; + const u8 *h0; + action0 = 0; + gc0 = gbp_contract_get (gci0); l2_len0 = vnet_buffer (b0)->l2.l2_len; h0 = vlib_buffer_get_current (b0); - ether_type0 = - clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2)); - - is_ip60 = (ether_type0 == ETHERNET_TYPE_IP6) ? 1 : 0; - /* - * tests against the ACL - */ - acl_plugin_fill_5tuple_inline (gm-> - acl_plugin.p_acl_main, - value0.gc_lc_index, b0, - is_ip60, - /* is_input */ 0, - /* is_l2_path */ 1, - &pkt_5tuple0); - acl_plugin_match_5tuple_inline (gm-> - acl_plugin.p_acl_main, - value0.gc_lc_index, - &pkt_5tuple0, is_ip60, - &action0, &acl_pos_p0, - &acl_match_p0, - &rule_match_p0, - &trace_bitmap0); - - if (action0 > 0) - next0 = - vnet_l2_feature_next (b0, gpm->l2_output_feat_next, - L2OUTPUT_FEAT_GBP_POLICY); + ether_type0 = *(u16 *) (h0 + l2_len0 - 2); + + if (!gbp_policy_is_ethertype_allowed (gc0, ether_type0)) + { + /* + * black list model so drop + */ + goto trace; + } + + if ((ether_type0 == + clib_net_to_host_u16 (ETHERNET_TYPE_IP6)) + || (ether_type0 == + clib_net_to_host_u16 (ETHERNET_TYPE_IP4))) + { + is_ip60 = + (ether_type0 == + clib_net_to_host_u16 (ETHERNET_TYPE_IP6)) ? 1 : + 0; + /* + * tests against the ACL + */ + acl_plugin_fill_5tuple_inline (gm-> + acl_plugin.p_acl_main, + gc0->gc_lc_index, b0, + is_ip60, + /* is_input */ 0, + /* is_l2_path */ 1, + &pkt_5tuple0); + acl_plugin_match_5tuple_inline (gm-> + acl_plugin.p_acl_main, + gc0->gc_lc_index, + &pkt_5tuple0, + is_ip60, &action0, + &acl_pos_p0, + &acl_match_p0, + &rule_match_p0, + &trace_bitmap0); + + if (action0 > 0) + { + vnet_buffer2 (b0)->gbp.flags |= + VXLAN_GBP_GPFLAGS_A; + gu = + gbp_rule_get (gc0->gc_rules[rule_match_p0]); + + switch (gu->gu_action) + { + case GBP_RULE_PERMIT: + next0 = vnet_l2_feature_next + (b0, + gpm->l2_output_feat_next + [is_port_based], + (is_port_based ? + L2OUTPUT_FEAT_GBP_POLICY_PORT : + L2OUTPUT_FEAT_GBP_POLICY_MAC)); + break; + case GBP_RULE_DENY: + ASSERT (0); + next0 = 0; + break; + case GBP_RULE_REDIRECT: + next0 = gbp_rule_l2_redirect (gu, b0); + break; + } + } + } } } } @@ -173,17 +306,23 @@ gbp_policy (vlib_main_t * vm, * the src EPG is not set when the packet arrives on an EPG * uplink interface and we do not need to apply policy */ - next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next, - L2OUTPUT_FEAT_GBP_POLICY); + next0 = + vnet_l2_feature_next (b0, + gpm->l2_output_feat_next[is_port_based], + (is_port_based ? + L2OUTPUT_FEAT_GBP_POLICY_PORT : + L2OUTPUT_FEAT_GBP_POLICY_MAC)); } + trace: if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED))) { gbp_policy_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->src_epg = key0.gck_src; t->dst_epg = key0.gck_dst; - t->acl_index = value0.gc_acl_index; + t->acl_index = (gc0 ? gc0->gc_acl_index : ~0), + t->allowed = (next0 != GBP_POLICY_NEXT_DENY); } /* verify speculative enqueue, maybe switch current next frame */ @@ -198,6 +337,20 @@ gbp_policy (vlib_main_t * vm, return frame->n_vectors; } +static uword +gbp_policy_port (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return (gbp_policy_inline (vm, node, frame, 1)); +} + +static uword +gbp_policy_mac (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return (gbp_policy_inline (vm, node, frame, 0)); +} + /* packet trace format function */ static u8 * format_gbp_policy_trace (u8 * s, va_list * args) @@ -207,16 +360,16 @@ format_gbp_policy_trace (u8 * s, va_list * args) gbp_policy_trace_t *t = va_arg (*args, gbp_policy_trace_t *); s = - format (s, "src:%d, dst:%d, acl:%d", t->src_epg, t->dst_epg, - t->acl_index); + format (s, "src:%d, dst:%d, acl:%d allowed:%d", + t->src_epg, t->dst_epg, t->acl_index, t->allowed); return s; } /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (gbp_policy_node) = { - .function = gbp_policy, - .name = "gbp-policy", +VLIB_REGISTER_NODE (gbp_policy_port_node) = { + .function = gbp_policy_port, + .name = "gbp-policy-port", .vector_size = sizeof (u32), .format_trace = format_gbp_policy_trace, .type = VLIB_NODE_TYPE_INTERNAL, @@ -231,7 +384,18 @@ VLIB_REGISTER_NODE (gbp_policy_node) = { }, }; -VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_node, gbp_policy); +VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_port_node, gbp_policy_port); + +VLIB_REGISTER_NODE (gbp_policy_mac_node) = { + .function = gbp_policy_mac, + .name = "gbp-policy-mac", + .vector_size = sizeof (u32), + .format_trace = format_gbp_policy_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .sibling_of = "gbp-policy-port", +}; + +VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_mac_node, gbp_policy_mac); /* *INDENT-ON* */ @@ -243,10 +407,15 @@ gbp_policy_init (vlib_main_t * vm) /* Initialize the feature next-node indexes */ feat_bitmap_init_next_nodes (vm, - gbp_policy_node.index, + gbp_policy_port_node.index, + L2OUTPUT_N_FEAT, + l2output_get_feat_names (), + gpm->l2_output_feat_next[1]); + feat_bitmap_init_next_nodes (vm, + gbp_policy_mac_node.index, L2OUTPUT_N_FEAT, l2output_get_feat_names (), - gpm->l2_output_feat_next); + gpm->l2_output_feat_next[0]); return error; }