From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/ethernet/mac_swap.c | 397 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 397 insertions(+) create mode 100644 src/vnet/ethernet/mac_swap.c (limited to 'src/vnet/ethernet/mac_swap.c') diff --git a/src/vnet/ethernet/mac_swap.c b/src/vnet/ethernet/mac_swap.c new file mode 100644 index 00000000000..c0fec12e61e --- /dev/null +++ b/src/vnet/ethernet/mac_swap.c @@ -0,0 +1,397 @@ +/* + * 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. + */ +#include +#include +#include +#include +#include +#include +#include + +typedef struct +{ + u32 cached_next_index; + u32 cached_sw_if_index; + + /* Hash table to map sw_if_index to next node index */ + uword *next_node_index_by_sw_if_index; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} mac_swap_main_t; + +typedef struct +{ + u8 src[6]; + u8 dst[6]; + u32 sw_if_index; + u32 next_index; +} swap_trace_t; + +/* packet trace format function */ +static u8 * +format_swap_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 *); + swap_trace_t *t = va_arg (*args, swap_trace_t *); + + s = format (s, "SWAP: dst now %U src now %U sw_if_index %d next_index %d", + format_ethernet_address, t->dst, + format_ethernet_address, t->src, t->sw_if_index, t->next_index); + return s; +} + +#define foreach_hw_driver_next \ + _(IP4) \ + _(IP6) \ + _(ETHERNET) + +mac_swap_main_t mac_swap_main; + +static vlib_node_registration_t mac_swap_node; + +#define foreach_mac_swap_error \ +_(SWAPS, "mac addresses swapped") + +typedef enum +{ +#define _(sym,str) MAC_SWAP_ERROR_##sym, + foreach_mac_swap_error +#undef _ + MAC_SWAP_N_ERROR, +} mac_swap_error_t; + +static char *mac_swap_error_strings[] = { +#define _(sym,string) string, + foreach_mac_swap_error +#undef _ +}; + +/* + * To drop a pkt and increment one of the previous counters: + * + * set b0->error = error_node->errors[RANDOM_ERROR_SAMPLE]; + * set next0 to a disposition index bound to "error-drop". + * + * To manually increment the specific counter MAC_SWAP_ERROR_SAMPLE: + * + * vlib_node_t *n = vlib_get_node (vm, mac_swap.index); + * u32 node_counter_base_index = n->error_heap_index; + * vlib_error_main_t * em = &vm->error_main; + * em->counters[node_counter_base_index + MAC_SWAP_ERROR_SAMPLE] += 1; + * + */ + +typedef enum +{ + MAC_SWAP_NEXT_DROP, + MAC_SWAP_N_NEXT, +} mac_swap_next_t; + +static uword +mac_swap_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + mac_swap_next_t next_index; + mac_swap_main_t *msm = &mac_swap_main; + vlib_node_t *n = vlib_get_node (vm, mac_swap_node.index); + u32 node_counter_base_index = n->error_heap_index; + vlib_error_main_t *em = &vm->error_main; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + 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; + uword *p0, *p1; + u64 tmp0a, tmp0b; + u64 tmp1a, tmp1b; + ethernet_header_t *h0, *h1; + + + /* 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, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + next0 = msm->cached_next_index; + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + next1 = msm->cached_next_index; + + if (PREDICT_FALSE (msm->cached_sw_if_index != sw_if_index0)) + { + p0 = + hash_get (msm->next_node_index_by_sw_if_index, sw_if_index0); + if (p0 == 0) + { + vnet_hw_interface_t *hw0; + + hw0 = vnet_get_sup_hw_interface (msm->vnet_main, + sw_if_index0); + + next0 = vlib_node_add_next (msm->vlib_main, + mac_swap_node.index, + hw0->output_node_index); + hash_set (msm->next_node_index_by_sw_if_index, + sw_if_index0, next0); + } + else + next0 = p0[0]; + msm->cached_sw_if_index = sw_if_index0; + msm->cached_next_index = next0; + next1 = next0; + } + if (PREDICT_FALSE (msm->cached_sw_if_index != sw_if_index1)) + { + p1 = + hash_get (msm->next_node_index_by_sw_if_index, sw_if_index1); + if (p1 == 0) + { + vnet_hw_interface_t *hw1; + + hw1 = vnet_get_sup_hw_interface (msm->vnet_main, + sw_if_index1); + + next1 = vlib_node_add_next (msm->vlib_main, + mac_swap_node.index, + hw1->output_node_index); + hash_set (msm->next_node_index_by_sw_if_index, + sw_if_index1, next1); + } + else + next1 = p1[0]; + msm->cached_sw_if_index = sw_if_index1; + msm->cached_next_index = next1; + } + + em->counters[node_counter_base_index + MAC_SWAP_ERROR_SWAPS] += 2; + + /* reset buffer so we always point at the MAC hdr */ + vlib_buffer_reset (b0); + vlib_buffer_reset (b1); + h0 = vlib_buffer_get_current (b0); + h1 = vlib_buffer_get_current (b1); + + /* Swap 2 x src and dst mac addresses using 8-byte load/stores */ + tmp0a = clib_net_to_host_u64 (((u64 *) (h0->dst_address))[0]); + tmp1a = clib_net_to_host_u64 (((u64 *) (h1->dst_address))[0]); + tmp0b = clib_net_to_host_u64 (((u64 *) (h0->src_address))[0]); + tmp1b = clib_net_to_host_u64 (((u64 *) (h1->src_address))[0]); + ((u64 *) (h0->dst_address))[0] = clib_host_to_net_u64 (tmp0b); + ((u64 *) (h1->dst_address))[0] = clib_host_to_net_u64 (tmp1b); + /* Move the ethertype from "b" to "a" */ + tmp0a &= ~(0xFFFF); + tmp1a &= ~(0xFFFF); + tmp0a |= tmp0b & 0xFFFF; + ((u64 *) (h0->src_address))[0] = clib_host_to_net_u64 (tmp0a); + tmp1a |= tmp1b & 0xFFFF; + ((u64 *) (h1->src_address))[0] = clib_host_to_net_u64 (tmp1a); + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + swap_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + clib_memcpy (t->src, h0->src_address, 6); + clib_memcpy (t->dst, h0->dst_address, 6); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + swap_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + clib_memcpy (t->src, h1->src_address, 6); + clib_memcpy (t->dst, h1->dst_address, 6); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + } + } + + 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; + u32 sw_if_index0; + uword *p0; + u64 tmp0a, tmp0b; + ethernet_header_t *h0; + + 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); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + next0 = msm->cached_next_index; + + if (PREDICT_FALSE (msm->cached_sw_if_index != sw_if_index0)) + { + p0 = + hash_get (msm->next_node_index_by_sw_if_index, sw_if_index0); + if (p0 == 0) + { + vnet_hw_interface_t *hw0; + + hw0 = vnet_get_sup_hw_interface (msm->vnet_main, + sw_if_index0); + + next0 = vlib_node_add_next (msm->vlib_main, + mac_swap_node.index, + hw0->output_node_index); + hash_set (msm->next_node_index_by_sw_if_index, + sw_if_index0, next0); + } + else + next0 = p0[0]; + msm->cached_sw_if_index = sw_if_index0; + msm->cached_next_index = next0; + } + + em->counters[node_counter_base_index + MAC_SWAP_ERROR_SWAPS] += 1; + + /* reset buffer so we always point at the MAC hdr */ + vlib_buffer_reset (b0); + h0 = vlib_buffer_get_current (b0); + + /* Exchange src and dst, preserve the ethertype */ + tmp0a = clib_net_to_host_u64 (((u64 *) (h0->dst_address))[0]); + tmp0b = clib_net_to_host_u64 (((u64 *) (h0->src_address))[0]); + ((u64 *) (h0->dst_address))[0] = clib_host_to_net_u64 (tmp0b); + tmp0a &= ~(0xFFFF); + tmp0a |= tmp0b & 0xFFFF; + ((u64 *) (h0->src_address))[0] = clib_host_to_net_u64 (tmp0a); + + /* ship it */ + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + swap_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + clib_memcpy (t->src, h0->src_address, 6); + clib_memcpy (t->dst, h0->dst_address, 6); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + + 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); + } + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (mac_swap_node,static) = { + .function = mac_swap_node_fn, + .name = "mac-swap", + .vector_size = sizeof (u32), + .format_trace = format_swap_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(mac_swap_error_strings), + .error_strings = mac_swap_error_strings, + + .n_next_nodes = MAC_SWAP_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [MAC_SWAP_NEXT_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +clib_error_t * +mac_swap_init (vlib_main_t * vm) +{ + mac_swap_main_t *msm = &mac_swap_main; + + msm->next_node_index_by_sw_if_index = hash_create (0, sizeof (uword)); + msm->cached_next_index = (u32) ~ 0; + msm->cached_sw_if_index = (u32) ~ 0; + msm->vlib_main = vm; + msm->vnet_main = vnet_get_main (); + + /* Driver RX nodes send pkts here... */ +#define _(a) ixge_set_next_node (IXGE_RX_NEXT_##a##_INPUT, "mac-swap"); + foreach_hw_driver_next +#undef _ +#define _(a) ixgev_set_next_node (IXGEV_RX_NEXT_##a##_INPUT, "mac-swap"); + foreach_hw_driver_next +#undef _ +#define _(a) ige_set_next_node (IGE_RX_NEXT_##a##_INPUT, "mac-swap"); + foreach_hw_driver_next +#undef _ + return 0; +} + +VLIB_INIT_FUNCTION (mac_swap_init); + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg