diff options
Diffstat (limited to 'vnet/vnet/l2/l2_output.c')
-rw-r--r-- | vnet/vnet/l2/l2_output.c | 708 |
1 files changed, 0 insertions, 708 deletions
diff --git a/vnet/vnet/l2/l2_output.c b/vnet/vnet/l2/l2_output.c deleted file mode 100644 index 953fcb0222a..00000000000 --- a/vnet/vnet/l2/l2_output.c +++ /dev/null @@ -1,708 +0,0 @@ -/* - * l2_output.c : layer 2 output packet processing - * - * Copyright (c) 2013 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 <vlib/vlib.h> -#include <vnet/vnet.h> -#include <vnet/pg/pg.h> -#include <vnet/ethernet/ethernet.h> -#include <vlib/cli.h> - -#include <vppinfra/error.h> -#include <vppinfra/hash.h> -#include <vnet/l2/feat_bitmap.h> -#include <vnet/l2/l2_output.h> - - -/* Feature graph node names */ -static char *l2output_feat_names[] = { -#define _(sym,name) name, - foreach_l2output_feat -#undef _ -}; - -char ** -l2output_get_feat_names (void) -{ - return l2output_feat_names; -} - -l2output_main_t l2output_main; - -typedef struct -{ - /* per-pkt trace data */ - u8 src[6]; - u8 dst[6]; - u32 sw_if_index; -} l2output_trace_t; - -/* packet trace format function */ -static u8 * -format_l2output_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 *); - l2output_trace_t *t = va_arg (*args, l2output_trace_t *); - - s = format (s, "l2-output: sw_if_index %d dst %U src %U", - t->sw_if_index, - format_ethernet_address, t->dst, - format_ethernet_address, t->src); - return s; -} - - -static char *l2output_error_strings[] = { -#define _(sym,string) string, - foreach_l2output_error -#undef _ -}; - -/** - * Check for split horizon violations. - * Return 0 if split horizon check passes, otherwise return non-zero. - * Packets should not be transmitted out an interface with the same - * split-horizon group as the input interface, except if the @c shg is 0 - * in which case the check always passes. - */ -static_always_inline u32 -split_horizon_violation (u8 shg1, u8 shg2) -{ - if (PREDICT_TRUE (shg1 == 0)) - { - return 0; - } - else - { - return shg1 == shg2; - } -} - -static_always_inline void -l2output_vtr (vlib_node_runtime_t * node, l2_output_config_t * config, - u32 feature_bitmap, vlib_buffer_t * b, u32 * next) -{ - if (PREDICT_FALSE (config->out_vtr_flag)) - { - /* Perform pre-vtr EFP filter check if configured */ - if (config->output_vtr.push_and_pop_bytes) - { - /* - * Perform output vlan tag rewrite and the pre-vtr EFP filter check. - * The EFP Filter only needs to be run if there is an output VTR - * configured. The flag for the post-vtr EFP Filter node is used - * to trigger the pre-vtr check as well. - */ - u32 failed1 = (feature_bitmap & L2OUTPUT_FEAT_EFP_FILTER) - && (l2_efp_filter_process (b, &(config->input_vtr))); - u32 failed2 = l2_vtr_process (b, &(config->output_vtr)); - - if (PREDICT_FALSE (failed1 | failed2)) - { - *next = L2OUTPUT_NEXT_DROP; - if (failed2) - { - b->error = node->errors[L2OUTPUT_ERROR_VTR_DROP]; - } - if (failed1) - { - b->error = node->errors[L2OUTPUT_ERROR_EFP_DROP]; - } - } - } - // perform the PBB rewrite - else if (config->output_pbb_vtr.push_and_pop_bytes) - { - u32 failed = l2_pbb_process (b, &(config->output_pbb_vtr)); - if (PREDICT_FALSE (failed)) - { - *next = L2OUTPUT_NEXT_DROP; - b->error = node->errors[L2OUTPUT_ERROR_VTR_DROP]; - } - } - } -} - - -static vlib_node_registration_t l2output_node; - -static uword -l2output_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - l2output_next_t next_index; - l2output_main_t *msm = &l2output_main; - u32 cached_sw_if_index; - u32 cached_next_index; - - /* Invalidate cache */ - cached_sw_if_index = ~0; - cached_next_index = ~0; /* warning be gone */ - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; /* number of packets to process */ - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - /* get space to enqueue frame to graph node "next_index" */ - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from >= 8 && n_left_to_next >= 4) - { - u32 bi0, bi1, bi2, bi3; - vlib_buffer_t *b0, *b1, *b2, *b3; - u32 next0, next1, next2, next3; - u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3; - ethernet_header_t *h0, *h1, *h2, *h3; - l2_output_config_t *config0, *config1, *config2, *config3; - u32 feature_bitmap0, feature_bitmap1; - u32 feature_bitmap2, feature_bitmap3; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p4, *p5, *p6, *p7; - - p4 = vlib_get_buffer (vm, from[4]); - p5 = vlib_get_buffer (vm, from[5]); - p6 = vlib_get_buffer (vm, from[6]); - p7 = vlib_get_buffer (vm, from[7]); - - /* Prefetch the buffer header for the N+2 loop iteration */ - vlib_prefetch_buffer_header (p4, LOAD); - vlib_prefetch_buffer_header (p5, LOAD); - vlib_prefetch_buffer_header (p6, LOAD); - vlib_prefetch_buffer_header (p7, LOAD); - } - - /* speculatively enqueue b0 and b1 to the current next frame */ - /* bi is "buffer index", b is pointer to the buffer */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - to_next[2] = bi2 = from[2]; - to_next[3] = bi3 = from[3]; - from += 4; - to_next += 4; - n_left_from -= 4; - n_left_to_next -= 4; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - b2 = vlib_get_buffer (vm, bi2); - b3 = vlib_get_buffer (vm, bi3); - - /* TX interface handles */ - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX]; - sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_TX]; - sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_TX]; - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) - { - h0 = vlib_buffer_get_current (b0); - h1 = vlib_buffer_get_current (b1); - h2 = vlib_buffer_get_current (b2); - h3 = vlib_buffer_get_current (b3); - if (b0->flags & VLIB_BUFFER_IS_TRACED) - { - l2output_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - clib_memcpy (t->src, h0->src_address, 6); - clib_memcpy (t->dst, h0->dst_address, 6); - } - if (b1->flags & VLIB_BUFFER_IS_TRACED) - { - l2output_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->sw_if_index = sw_if_index1; - clib_memcpy (t->src, h1->src_address, 6); - clib_memcpy (t->dst, h1->dst_address, 6); - } - if (b2->flags & VLIB_BUFFER_IS_TRACED) - { - l2output_trace_t *t = - vlib_add_trace (vm, node, b2, sizeof (*t)); - t->sw_if_index = sw_if_index2; - clib_memcpy (t->src, h2->src_address, 6); - clib_memcpy (t->dst, h2->dst_address, 6); - } - if (b3->flags & VLIB_BUFFER_IS_TRACED) - { - l2output_trace_t *t = - vlib_add_trace (vm, node, b3, sizeof (*t)); - t->sw_if_index = sw_if_index3; - clib_memcpy (t->src, h3->src_address, 6); - clib_memcpy (t->dst, h3->dst_address, 6); - } - } - - vlib_node_increment_counter (vm, l2output_node.index, - L2OUTPUT_ERROR_L2OUTPUT, 4); - - /* Get config for the output interface */ - config0 = vec_elt_at_index (msm->configs, sw_if_index0); - config1 = vec_elt_at_index (msm->configs, sw_if_index1); - config2 = vec_elt_at_index (msm->configs, sw_if_index2); - config3 = vec_elt_at_index (msm->configs, sw_if_index3); - - /* - * Get features from the config - * TODO: mask out any non-applicable features - */ - feature_bitmap0 = config0->feature_bitmap; - feature_bitmap1 = config1->feature_bitmap; - feature_bitmap2 = config2->feature_bitmap; - feature_bitmap3 = config3->feature_bitmap; - - /* Determine next node */ - l2_output_dispatch (msm->vlib_main, - msm->vnet_main, - node, - l2output_node.index, - &cached_sw_if_index, - &cached_next_index, - &msm->next_nodes, - b0, sw_if_index0, feature_bitmap0, &next0); - - l2_output_dispatch (msm->vlib_main, - msm->vnet_main, - node, - l2output_node.index, - &cached_sw_if_index, - &cached_next_index, - &msm->next_nodes, - b1, sw_if_index1, feature_bitmap1, &next1); - - l2_output_dispatch (msm->vlib_main, - msm->vnet_main, - node, - l2output_node.index, - &cached_sw_if_index, - &cached_next_index, - &msm->next_nodes, - b2, sw_if_index2, feature_bitmap2, &next2); - - l2_output_dispatch (msm->vlib_main, - msm->vnet_main, - node, - l2output_node.index, - &cached_sw_if_index, - &cached_next_index, - &msm->next_nodes, - b3, sw_if_index3, feature_bitmap3, &next3); - - l2output_vtr (node, config0, feature_bitmap0, b0, &next0); - l2output_vtr (node, config1, feature_bitmap1, b1, &next1); - l2output_vtr (node, config2, feature_bitmap2, b2, &next2); - l2output_vtr (node, config3, feature_bitmap3, b3, &next3); - - /* - * Perform the split horizon check - * The check can only fail for non-zero shg's - */ - if (PREDICT_FALSE (config0->shg + config1->shg + - config2->shg + config3->shg)) - { - /* one of the checks might fail, check both */ - if (split_horizon_violation - (config0->shg, vnet_buffer (b0)->l2.shg)) - { - next0 = L2OUTPUT_NEXT_DROP; - b0->error = node->errors[L2OUTPUT_ERROR_SHG_DROP]; - } - if (split_horizon_violation - (config1->shg, vnet_buffer (b1)->l2.shg)) - { - next1 = L2OUTPUT_NEXT_DROP; - b1->error = node->errors[L2OUTPUT_ERROR_SHG_DROP]; - } - if (split_horizon_violation - (config2->shg, vnet_buffer (b2)->l2.shg)) - { - next2 = L2OUTPUT_NEXT_DROP; - b2->error = node->errors[L2OUTPUT_ERROR_SHG_DROP]; - } - if (split_horizon_violation - (config3->shg, vnet_buffer (b3)->l2.shg)) - { - next3 = L2OUTPUT_NEXT_DROP; - b3->error = node->errors[L2OUTPUT_ERROR_SHG_DROP]; - } - } - - /* verify speculative enqueues, maybe switch current next frame */ - /* if next0==next1==next_index then nothing special needs to be done */ - vlib_validate_buffer_enqueue_x4 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, bi2, bi3, - next0, next1, next2, next3); - } - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0; - u32 sw_if_index0; - ethernet_header_t *h0; - l2_output_config_t *config0; - u32 feature_bitmap0; - - /* speculatively enqueue b0 to the current next frame */ - 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_TX]; - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - l2output_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - h0 = vlib_buffer_get_current (b0); - clib_memcpy (t->src, h0->src_address, 6); - clib_memcpy (t->dst, h0->dst_address, 6); - } - - vlib_node_increment_counter (vm, l2output_node.index, - L2OUTPUT_ERROR_L2OUTPUT, 1); - - /* Get config for the output interface */ - config0 = vec_elt_at_index (msm->configs, sw_if_index0); - - /* - * Get features from the config - * TODO: mask out any non-applicable features - */ - feature_bitmap0 = config0->feature_bitmap; - - /* Determine next node */ - l2_output_dispatch (msm->vlib_main, - msm->vnet_main, - node, - l2output_node.index, - &cached_sw_if_index, - &cached_next_index, - &msm->next_nodes, - b0, sw_if_index0, feature_bitmap0, &next0); - - l2output_vtr (node, config0, feature_bitmap0, b0, &next0); - - /* Perform the split horizon check */ - if (PREDICT_FALSE - (split_horizon_violation - (config0->shg, vnet_buffer (b0)->l2.shg))) - { - next0 = L2OUTPUT_NEXT_DROP; - b0->error = node->errors[L2OUTPUT_ERROR_SHG_DROP]; - } - - /* verify speculative enqueue, maybe switch current next frame */ - 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 (l2output_node,static) = { - .function = l2output_node_fn, - .name = "l2-output", - .vector_size = sizeof (u32), - .format_trace = format_l2output_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(l2output_error_strings), - .error_strings = l2output_error_strings, - - .n_next_nodes = L2OUTPUT_N_NEXT, - - /* edit / add dispositions here */ - .next_nodes = { - [L2OUTPUT_NEXT_DROP] = "error-drop", - [L2OUTPUT_NEXT_BAD_INTF] = "l2-output-bad-intf", - }, -}; -/* *INDENT-ON* */ - - -#define foreach_l2output_bad_intf_error \ -_(DROP, "L2 output to interface not in L2 mode or deleted") - -static char *l2output_bad_intf_error_strings[] = { -#define _(sym,string) string, - foreach_l2output_bad_intf_error -#undef _ -}; - -typedef enum -{ -#define _(sym,str) L2OUTPUT_BAD_INTF_ERROR_##sym, - foreach_l2output_bad_intf_error -#undef _ - L2OUTPUT_BAD_INTF_N_ERROR, -} l2output_bad_intf_error_t; - - -/** - * Output node for interfaces/tunnels which was in L2 mode but were changed - * to L3 mode or possibly deleted thereafter. On changing forwarding mode - * of any tunnel/interface from L2 to L3, its entry in l2_output_main table - * next_nodes.output_node_index_vec[sw_if_index] MUST be set to the value of - * L2OUTPUT_NEXT_BAD_INTF. Thus, if there are stale entries in the L2FIB for - * this sw_if_index, l2-output will send packets for this sw_if_index to the - * l2-output-bad-intf node which just setup the proper drop reason before - * sending packets to the error-drop node to drop the packet. Then, stale L2FIB - * entries for delted tunnels won't cause possible packet or memory corrpution. - */ -static vlib_node_registration_t l2output_bad_intf_node; - -static uword -l2output_bad_intf_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - l2output_next_t next_index = 0; - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; /* number of packets to process */ - - while (n_left_from > 0) - { - u32 n_left_to_next; - - /* get space to enqueue frame to graph node "next_index" */ - 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; - - 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); - b0->error = node->errors[L2OUTPUT_BAD_INTF_ERROR_DROP]; - b1->error = node->errors[L2OUTPUT_BAD_INTF_ERROR_DROP]; - } - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - - 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); - b0->error = node->errors[L2OUTPUT_BAD_INTF_ERROR_DROP]; - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (l2output_bad_intf_node,static) = { - .function = l2output_bad_intf_node_fn, - .name = "l2-output-bad-intf", - .vector_size = sizeof (u32), - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(l2output_bad_intf_error_strings), - .error_strings = l2output_bad_intf_error_strings, - - .n_next_nodes = 1, - - /* edit / add dispositions here */ - .next_nodes = { - [0] = "error-drop", - }, -}; -/* *INDENT-ON* */ - - -VLIB_NODE_FUNCTION_MULTIARCH (l2output_node, l2output_node_fn) - clib_error_t *l2output_init (vlib_main_t * vm) -{ - l2output_main_t *mp = &l2output_main; - - mp->vlib_main = vm; - mp->vnet_main = vnet_get_main (); - - /* Create the config vector */ - vec_validate (mp->configs, 100); - /* Until we hook up the CLI config, just create 100 sw interface entries and zero them */ - - /* Initialize the feature next-node indexes */ - feat_bitmap_init_next_nodes (vm, - l2output_node.index, - L2OUTPUT_N_FEAT, - l2output_get_feat_names (), - mp->next_nodes.feat_next_node_index); - - /* Initialize the output node mapping table */ - l2output_init_output_node_vec (&mp->next_nodes.output_node_index_vec); - - return 0; -} - -VLIB_INIT_FUNCTION (l2output_init); - -typedef struct -{ - u32 node_index; - u32 sw_if_index; -} output_node_mapping_rpc_args_t; - -static void output_node_rpc_callback (output_node_mapping_rpc_args_t * a); - -static void -output_node_mapping_send_rpc (u32 node_index, u32 sw_if_index) -{ - output_node_mapping_rpc_args_t args; - void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); - - args.node_index = node_index; - args.sw_if_index = sw_if_index; - - vl_api_rpc_call_main_thread (output_node_rpc_callback, - (u8 *) & args, sizeof (args)); -} - - -/** Create a mapping in the next node mapping table for the given sw_if_index. */ -u32 -l2output_create_output_node_mapping (vlib_main_t * vlib_main, vnet_main_t * vnet_main, u32 node_index, /* index of current node */ - u32 * output_node_index_vec, - u32 sw_if_index) -{ - - u32 next; /* index of next graph node */ - vnet_hw_interface_t *hw0; - u32 *node; - - hw0 = vnet_get_sup_hw_interface (vnet_main, sw_if_index); - - uword cpu_number; - - cpu_number = os_get_cpu_number (); - - if (cpu_number) - { - u32 oldflags; - - oldflags = __sync_fetch_and_or (&hw0->flags, - VNET_HW_INTERFACE_FLAG_L2OUTPUT_MAPPED); - - if ((oldflags & VNET_HW_INTERFACE_FLAG_L2OUTPUT_MAPPED)) - return L2OUTPUT_NEXT_DROP; - - output_node_mapping_send_rpc (node_index, sw_if_index); - return L2OUTPUT_NEXT_DROP; - } - - /* dynamically create graph node arc */ - next = vlib_node_add_next (vlib_main, node_index, hw0->output_node_index); - - /* Initialize vector with the mapping */ - - node = vec_elt_at_index (output_node_index_vec, sw_if_index); - *node = next; - - /* reset mapping bit, includes memory barrier */ - __sync_fetch_and_and (&hw0->flags, ~VNET_HW_INTERFACE_FLAG_L2OUTPUT_MAPPED); - - return next; -} - -void -output_node_rpc_callback (output_node_mapping_rpc_args_t * a) -{ - vlib_main_t *vm = vlib_get_main (); - vnet_main_t *vnm = vnet_get_main (); - l2output_main_t *mp = &l2output_main; - - (void) l2output_create_output_node_mapping - (vm, vnm, a->node_index, mp->next_nodes.output_node_index_vec, - a->sw_if_index); -} - -/* Get a pointer to the config for the given interface */ -l2_output_config_t * -l2output_intf_config (u32 sw_if_index) -{ - l2output_main_t *mp = &l2output_main; - - vec_validate (mp->configs, sw_if_index); - return vec_elt_at_index (mp->configs, sw_if_index); -} - -/** Enable (or disable) the feature in the bitmap for the given interface. */ -void -l2output_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable) -{ - l2output_main_t *mp = &l2output_main; - l2_output_config_t *config; - - vec_validate (mp->configs, sw_if_index); - config = vec_elt_at_index (mp->configs, sw_if_index); - - if (enable) - { - config->feature_bitmap |= feature_bitmap; - } - else - { - config->feature_bitmap &= ~feature_bitmap; - } -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |