Unify and cleanup usage of hash_set/unset_mem by various tunnels - vpp

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author	John Lo <loj@cisco.com>	2018-01-04 16:39:42 -0500
committer	Dave Barach <openvpp@barachs.net>	2018-01-05 16:50:02 +0000
commit	e6bfeab1c352ae73a19361c038e2a06a58c035db (patch)
tree	73cbf094b56164047e993d9641cbf81ee4eaeae2 /src/vnet/span/span.api
parent	cba6936c45bc3265ae695e8266bdefc65e7a5116 (diff)

Unify and cleanup usage of hash_set/unset_mem by various tunnels

Move the functions hash_set_key_copy() and hash_unset_key_free() which are dupilicated in various tunnel support code modules to hash.h as hash_set_mem_alloc() and hash_unset_mem_free() to be used by all. Change-Id: I40723cabe29072ab7feb1804c221f28606d8e4fe Signed-off-by: John Lo <loj@cisco.com>

Diffstat (limited to 'src/vnet/span/span.api')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file * @brief Functions for encapsulating VXLAN GPE tunnels * */ #include <vppinfra/error.h> #include <vppinfra/hash.h> #include <vnet/vnet.h> #include <vnet/ip/ip.h> #include <vnet/ethernet/ethernet.h> #include <vnet/vxlan-gpe/vxlan_gpe.h> /** Statistics (not really errors) */ #define foreach_vxlan_gpe_encap_error \ _(ENCAPSULATED, "good packets encapsulated") /** * @brief VXLAN GPE encap error strings */ static char * vxlan_gpe_encap_error_strings[] = { #define _(sym,string) string, foreach_vxlan_gpe_encap_error #undef _ }; /** * @brief Struct for VXLAN GPE errors/counters */ typedef enum { #define _(sym,str) VXLAN_GPE_ENCAP_ERROR_##sym, foreach_vxlan_gpe_encap_error #undef _ VXLAN_GPE_ENCAP_N_ERROR, } vxlan_gpe_encap_error_t; /** * @brief Struct for tracing VXLAN GPE encapsulated packets */ typedef struct { u32 tunnel_index; } vxlan_gpe_encap_trace_t; /** * @brief Trace of packets encapsulated in VXLAN GPE * * @param *s * @param *args * * @return *s * */ u8 * format_vxlan_gpe_encap_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); vxlan_gpe_encap_trace_t * t = va_arg (*args, vxlan_gpe_encap_trace_t *); s = format (s, "VXLAN-GPE-ENCAP: tunnel %d", t->tunnel_index); return s; } /** * @brief Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup * * @param *ngm * @param *b0 * @param *t0 contains rewrite header * @param *next0 relative index of next dispatch function (next node) * @param is_v4 Is this IPv4? (or IPv6) * */ always_inline void vxlan_gpe_encap_one_inline (vxlan_gpe_main_t * ngm, vlib_buffer_t * b0, vxlan_gpe_tunnel_t * t0, u32 * next0, u8 is_v4) { ASSERT(sizeof(ip4_vxlan_gpe_header_t) == 36); ASSERT(sizeof(ip6_vxlan_gpe_header_t) == 56); ip_udp_encap_one (ngm->vlib_main, b0, t0->rewrite, t0->rewrite_size, is_v4); next0[0] = t0->encap_next_node; } /** * @brief Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup for two packets * * @param *ngm * @param *b0 Packet0 * @param *b1 Packet1 * @param *t0 contains rewrite header for Packet0 * @param *t1 contains rewrite header for Packet1 * @param *next0 relative index of next dispatch function (next node) for Packet0 * @param *next1 relative index of next dispatch function (next node) for Packet1 * @param is_v4 Is this IPv4? (or IPv6) * */ always_inline void vxlan_gpe_encap_two_inline (vxlan_gpe_main_t * ngm, vlib_buffer_t * b0, vlib_buffer_t * b1, vxlan_gpe_tunnel_t * t0, vxlan_gpe_tunnel_t * t1, u32 * next0, u32 * next1, u8 is_v4) { ASSERT(sizeof(ip4_vxlan_gpe_header_t) == 36); ASSERT(sizeof(ip6_vxlan_gpe_header_t) == 56); ip_udp_encap_one (ngm->vlib_main, b0, t0->rewrite, t0->rewrite_size, is_v4); ip_udp_encap_one (ngm->vlib_main, b1, t1->rewrite, t1->rewrite_size, is_v4); next0[0] = next1[0] = t0->encap_next_node; } /** * @brief Common processing for IPv4 and IPv6 VXLAN GPE encap dispatch functions * * It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE * tunnels are "establish local". This means that we don't have a TX interface as yet * as we need to look up where the outer-header dest is. By setting the TX index in the * buffer metadata to the encap FIB, we can do a lookup to get the adjacency and real TX. * * vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; * * @node vxlan-gpe-input * @param *vm * @param *node * @param *from_frame * * @return from_frame->n_vectors * */ static uword vxlan_gpe_encap (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { u32 n_left_from, next_index, *from, *to_next; vxlan_gpe_main_t * ngm = &vxlan_gpe_main; vnet_main_t * vnm = ngm->vnet_main; vnet_interface_main_t * im = &vnm->interface_main; u32 pkts_encapsulated = 0; u32 thread_index = vlib_get_thread_index (); u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; stats_sw_if_index = node->runtime_data[0]; stats_n_packets = stats_n_bytes = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t * b0, *b1; u32 next0, next1; u32 sw_if_index0, sw_if_index1, len0, len1; vnet_hw_interface_t * hi0, *hi1; vxlan_gpe_tunnel_t * t0, *t1; u8 is_ip4_0, is_ip4_1; next0 = next1 = VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP; /* Prefetch next iteration. */ { vlib_buffer_t * p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); vlib_prefetch_buffer_header(p2, LOAD); vlib_prefetch_buffer_header(p3, LOAD); CLIB_PREFETCH(p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH(p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); } bi0 = from[0]; bi1 = from[1]; to_next[0] = bi0; to_next[1] = bi1; from += 2; to_next += 2; n_left_to_next -= 2; n_left_from -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); /* 1-wide cache? */ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX]; sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX]; hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]); hi1 = vnet_get_sup_hw_interface (vnm, vnet_buffer(b1)->sw_if_index[VLIB_TX]); t0 = pool_elt_at_index(ngm->tunnels, hi0->dev_instance); t1 = pool_elt_at_index(ngm->tunnels, hi1->dev_instance); is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4); is_ip4_1 = (t1->flags & VXLAN_GPE_TUNNEL_IS_IPV4); if (PREDICT_TRUE(is_ip4_0 == is_ip4_1)) { vxlan_gpe_encap_two_inline (ngm, b0, b1, t0, t1, &next0, &next1,is_ip4_0); } else { vxlan_gpe_encap_one_inline (ngm, b0, t0, &next0, is_ip4_0); vxlan_gpe_encap_one_inline (ngm, b1, t1, &next1, is_ip4_1); } /* Reset to look up tunnel partner in the configured FIB */ vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->encap_fib_index; vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1; pkts_encapsulated += 2; len0 = vlib_buffer_length_in_chain (vm, b0); len1 = vlib_buffer_length_in_chain (vm, b0); stats_n_packets += 2; stats_n_bytes += len0 + len1; /* Batch stats increment on the same vxlan tunnel so counter is not incremented per packet. Note stats are still incremented for deleted and admin-down tunnel where packets are dropped. It is not worthwhile to check for this rare case and affect normal path performance. */ if (PREDICT_FALSE((sw_if_index0 != stats_sw_if_index) || (sw_if_index1 != stats_sw_if_index))) { stats_n_packets -= 2; stats_n_bytes -= len0 + len1; if (sw_if_index0 == sw_if_index1) { if (stats_n_packets) vlib_increment_combined_counter ( im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); stats_sw_if_index = sw_if_index0; stats_n_packets = 2; stats_n_bytes = len0 + len1; } else { vlib_increment_combined_counter ( im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, sw_if_index0, 1, len0); vlib_increment_combined_counter ( im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, sw_if_index1, 1, len1); } } if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gpe_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr)); tr->tunnel_index = t0 - ngm->tunnels; } if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gpe_encap_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof(*tr)); tr->tunnel_index = t1 - ngm->tunnels; } vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t * b0; u32 next0 = VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP; u32 sw_if_index0, len0; vnet_hw_interface_t * hi0; vxlan_gpe_tunnel_t * t0; u8 is_ip4_0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); /* 1-wide cache? */ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX]; hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer(b0)->sw_if_index[VLIB_TX]); t0 = pool_elt_at_index(ngm->tunnels, hi0->dev_instance); is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4); vxlan_gpe_encap_one_inline (ngm, b0, t0, &next0, is_ip4_0); /* Reset to look up tunnel partner in the configured FIB */ vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_fib_index; vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0; pkts_encapsulated++; len0 = vlib_buffer_length_in_chain (vm, b0); stats_n_packets += 1; stats_n_bytes += len0; /* Batch stats increment on the same vxlan tunnel so counter is not * incremented per packet. Note stats are still incremented for deleted * and admin-down tunnel where packets are dropped. It is not worthwhile * to check for this rare case and affect normal path performance. */ if (PREDICT_FALSE(sw_if_index0 != stats_sw_if_index)) { stats_n_packets -= 1; stats_n_bytes -= len0; if (stats_n_packets) vlib_increment_combined_counter ( im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); stats_n_packets = 1; stats_n_bytes = len0; stats_sw_if_index = sw_if_index0; } if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gpe_encap_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof(*tr)); tr->tunnel_index = t0 - ngm->tunnels; } vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } vlib_node_increment_counter (vm, node->node_index, VXLAN_GPE_ENCAP_ERROR_ENCAPSULATED, pkts_encapsulated); /* Increment any remaining batch stats */ if (stats_n_packets) { vlib_increment_combined_counter ( im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); node->runtime_data[0] = stats_sw_if_index; } return from_frame->n_vectors; } VLIB_REGISTER_NODE (vxlan_gpe_encap_node) = { .function = vxlan_gpe_encap, .name = "vxlan-gpe-encap", .vector_size = sizeof (u32), .format_trace = format_vxlan_gpe_encap_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(vxlan_gpe_encap_error_strings), .error_strings = vxlan_gpe_encap_error_strings, .n_next_nodes = VXLAN_GPE_ENCAP_N_NEXT, .next_nodes = { [VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP] = "ip4-lookup", [VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP] = "ip6-lookup", [VXLAN_GPE_ENCAP_NEXT_DROP] = "error-drop", }, };


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