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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /vnet/vnet/l2/l2_efp_filter.c
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'vnet/vnet/l2/l2_efp_filter.c')
-rw-r--r--vnet/vnet/l2/l2_efp_filter.c614
1 files changed, 0 insertions, 614 deletions
diff --git a/vnet/vnet/l2/l2_efp_filter.c b/vnet/vnet/l2/l2_efp_filter.c
deleted file mode 100644
index 2db4dc69c9c..00000000000
--- a/vnet/vnet/l2/l2_efp_filter.c
+++ /dev/null
@@ -1,614 +0,0 @@
-/*
- * l2_efp_filter.c : layer 2 egress EFP Filter 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/ethernet/ethernet.h>
-#include <vnet/ethernet/packet.h>
-#include <vnet/l2/feat_bitmap.h>
-#include <vnet/l2/l2_output.h>
-#include <vnet/ethernet/ethernet.h>
-
-#include <vppinfra/error.h>
-#include <vppinfra/cache.h>
-
-/**
- * @file
- * @brief EFP-filter - Ethernet Flow Point Filter.
- *
- * It is possible to transmit a packet out a subinterface with VLAN tags
- * that are not compatible with that subinterface. In other words, if that
- * packet arrived on the output port, it would not be classified as coming
- * from the output subinterface. This can happen in various ways: through
- * misconfiguration, by putting subinterfaces with different VLAN encaps in
- * the same bridge-domain, etc. The EFP Filter Check detects such packets
- * and drops them. It consists of two checks, one that verifies the packet
- * prior to output VLAN tag rewrite and one that verifies the packet after
- * VLAN tag rewrite.
- *
- */
-typedef struct
-{
-
- /* Next nodes for features and output interfaces */
- l2_output_next_nodes_st next_nodes;
-
- /* convenience variables */
- vlib_main_t *vlib_main;
- vnet_main_t *vnet_main;
-} l2_efp_filter_main_t;
-
-
-typedef struct
-{
- /* per-pkt trace data */
- u8 src[6];
- u8 dst[6];
- u8 raw[12]; /* raw data (vlans) */
- u32 sw_if_index;
-} l2_efp_filter_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_l2_efp_filter_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 *);
- l2_efp_filter_trace_t *t = va_arg (*args, l2_efp_filter_trace_t *);
-
- s = format (s, "l2-output-vtr: sw_if_index %d dst %U src %U data "
- "%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
- t->sw_if_index,
- format_ethernet_address, t->dst,
- format_ethernet_address, t->src,
- t->raw[0], t->raw[1], t->raw[2], t->raw[3], t->raw[4],
- t->raw[5], t->raw[6], t->raw[7], t->raw[8], t->raw[9],
- t->raw[10], t->raw[11]);
- return s;
-}
-
-l2_efp_filter_main_t l2_efp_filter_main;
-
-static vlib_node_registration_t l2_efp_filter_node;
-
-#define foreach_l2_efp_filter_error \
-_(L2_EFP_FILTER, "L2 EFP filter packets") \
-_(DROP, "L2 EFP filter post-rewrite drops")
-
-typedef enum
-{
-#define _(sym,str) L2_EFP_FILTER_ERROR_##sym,
- foreach_l2_efp_filter_error
-#undef _
- L2_EFP_FILTER_N_ERROR,
-} l2_efp_filter_error_t;
-
-static char *l2_efp_filter_error_strings[] = {
-#define _(sym,string) string,
- foreach_l2_efp_filter_error
-#undef _
-};
-
-typedef enum
-{
- L2_EFP_FILTER_NEXT_DROP,
- L2_EFP_FILTER_N_NEXT,
-} l2_efp_filter_next_t;
-
-
-/**
- * Extract fields from the packet that will be used in interface
- * classification.
- */
-static_always_inline void
-extract_keys (vnet_main_t * vnet_main,
- u32 sw_if_index0,
- vlib_buffer_t * b0,
- u32 * port_sw_if_index0,
- u16 * first_ethertype0,
- u16 * outer_id0, u16 * inner_id0, u32 * match_flags0)
-{
- ethernet_header_t *e0;
- ethernet_vlan_header_t *h0;
- u32 tag_len;
- u32 tag_num;
-
- *port_sw_if_index0 =
- vnet_get_sup_sw_interface (vnet_main, sw_if_index0)->sw_if_index;
-
- e0 = vlib_buffer_get_current (b0);
- h0 = (ethernet_vlan_header_t *) (e0 + 1);
-
- *first_ethertype0 = clib_net_to_host_u16 (e0->type);
- *outer_id0 = clib_net_to_host_u16 (h0[0].priority_cfi_and_id);
- *inner_id0 = clib_net_to_host_u16 (h0[1].priority_cfi_and_id);
-
- tag_len = vnet_buffer (b0)->l2.l2_len - sizeof (ethernet_header_t);
- tag_num = tag_len / sizeof (ethernet_vlan_header_t);
- *match_flags0 = eth_create_valid_subint_match_flags (tag_num);
-}
-
-/*
- * EFP filtering is a basic switch feature which prevents an interface from
- * transmitting a packet that doesn't match the interface's ingress match
- * criteria. The check has two parts, one performed before egress vlan tag
- * rewrite and one after.
- *
- * The pre-rewrite check insures the packet matches what an ingress packet looks
- * like after going through the interface's ingress tag rewrite operation. Only
- * pushed tags are compared. So:
- * - if the ingress vlan tag rewrite pushes no tags (or is not enabled),
- * any packet passes the filter
- * - if the ingress vlan tag rewrite pushes one tag,
- * the packet must have at least one tag, and the outer tag must match the pushed tag
- * - if the ingress vlan tag rewrite pushes two tags,
- * the packet must have at least two tags, and the outer two tags must match the pushed tags
- *
- * The pre-rewrite check is performed in the l2-output node.
- *
- * The post-rewrite check insures the packet matches what an ingress packet looks
- * like before going through the interface's ingress tag rewrite operation. It verifies
- * that such a packet arriving on the wire at this port would be classified as arriving
- * an input interface equal to the packet's output interface. This can be done by running
- * the output packet's vlan tags and output port through the interface classification,
- * and checking if the resulting interface matches the output interface.
- *
- * The post-rewrite check is performed here.
- */
-
-static uword
-l2_efp_filter_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- l2_efp_filter_next_t next_index;
- l2_efp_filter_main_t *msm = &l2_efp_filter_main;
- vlib_node_t *n = vlib_get_node (vm, l2_efp_filter_node.index);
- u32 node_counter_base_index = n->error_heap_index;
- vlib_error_main_t *em = &vm->error_main;
- u32 cached_sw_if_index = ~0;
- u32 cached_next_index = ~0;
-
- /* invalidate cache to begin with */
- cached_sw_if_index = ~0;
-
- 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 >= 6 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- u32 feature_bitmap0, feature_bitmap1;
- u16 first_ethertype0, first_ethertype1;
- u16 outer_id0, inner_id0, outer_id1, inner_id1;
- u32 match_flags0, match_flags1;
- u32 port_sw_if_index0, subint_sw_if_index0, port_sw_if_index1,
- subint_sw_if_index1;
- vnet_hw_interface_t *hi0, *hi1;
- main_intf_t *main_intf0, *main_intf1;
- vlan_intf_t *vlan_intf0, *vlan_intf1;
- qinq_intf_t *qinq_intf0, *qinq_intf1;
- u32 is_l20, is_l21;
- __attribute__ ((unused)) u32 matched0, matched1;
- u8 error0, error1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3, *p4, *p5;
- __attribute__ ((unused)) u32 sw_if_index2, sw_if_index3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
- p4 = vlib_get_buffer (vm, from[4]);
- p5 = vlib_get_buffer (vm, from[5]);
-
- /* Prefetch the buffer header and packet for the N+2 loop iteration */
- vlib_prefetch_buffer_header (p4, LOAD);
- vlib_prefetch_buffer_header (p5, LOAD);
-
- CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
-
- /*
- * Prefetch the input config for the N+1 loop iteration
- * This depends on the buffer header above
- */
- sw_if_index2 = vnet_buffer (p2)->sw_if_index[VLIB_TX];
- sw_if_index3 = vnet_buffer (p3)->sw_if_index[VLIB_TX];
- /*
- * $$$ TODO
- * CLIB_PREFETCH (vec_elt_at_index(l2output_main.configs, sw_if_index2), CLIB_CACHE_LINE_BYTES, LOAD);
- * CLIB_PREFETCH (vec_elt_at_index(l2output_main.configs, sw_if_index3), CLIB_CACHE_LINE_BYTES, 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];
- 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);
-
- /* 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];
-
- /* process 2 packets */
- em->counters[node_counter_base_index +
- L2_EFP_FILTER_ERROR_L2_EFP_FILTER] += 2;
-
- /* Remove ourself from the feature bitmap */
- feature_bitmap0 =
- vnet_buffer (b0)->l2.feature_bitmap & ~L2OUTPUT_FEAT_EFP_FILTER;
- feature_bitmap1 =
- vnet_buffer (b1)->l2.feature_bitmap & ~L2OUTPUT_FEAT_EFP_FILTER;
-
- /* Determine next node */
- l2_output_dispatch (msm->vlib_main,
- msm->vnet_main,
- node,
- l2_efp_filter_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,
- l2_efp_filter_node.index,
- &cached_sw_if_index,
- &cached_next_index,
- &msm->next_nodes,
- b1, sw_if_index1, feature_bitmap1, &next1);
-
- /* perform the efp filter check on two packets */
-
- extract_keys (msm->vnet_main,
- sw_if_index0,
- b0,
- &port_sw_if_index0,
- &first_ethertype0,
- &outer_id0, &inner_id0, &match_flags0);
-
- extract_keys (msm->vnet_main,
- sw_if_index1,
- b1,
- &port_sw_if_index1,
- &first_ethertype1,
- &outer_id1, &inner_id1, &match_flags1);
-
- eth_vlan_table_lookups (&ethernet_main,
- msm->vnet_main,
- port_sw_if_index0,
- first_ethertype0,
- outer_id0,
- inner_id0,
- &hi0,
- &main_intf0, &vlan_intf0, &qinq_intf0);
-
- eth_vlan_table_lookups (&ethernet_main,
- msm->vnet_main,
- port_sw_if_index1,
- first_ethertype1,
- outer_id1,
- inner_id1,
- &hi1,
- &main_intf1, &vlan_intf1, &qinq_intf1);
-
- matched0 = eth_identify_subint (hi0,
- b0,
- match_flags0,
- main_intf0,
- vlan_intf0,
- qinq_intf0,
- &subint_sw_if_index0,
- &error0, &is_l20);
-
- matched1 = eth_identify_subint (hi1,
- b1,
- match_flags1,
- main_intf1,
- vlan_intf1,
- qinq_intf1,
- &subint_sw_if_index1,
- &error1, &is_l21);
-
- if (PREDICT_FALSE (sw_if_index0 != subint_sw_if_index0))
- {
- /* Drop packet */
- next0 = L2_EFP_FILTER_NEXT_DROP;
- b0->error = node->errors[L2_EFP_FILTER_ERROR_DROP];
- }
-
- if (PREDICT_FALSE (sw_if_index1 != subint_sw_if_index1))
- {
- /* Drop packet */
- next1 = L2_EFP_FILTER_NEXT_DROP;
- b1->error = node->errors[L2_EFP_FILTER_ERROR_DROP];
- }
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
- {
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- ethernet_header_t *h0 = vlib_buffer_get_current (b0);
- l2_efp_filter_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);
- clib_memcpy (t->raw, &h0->type, sizeof (t->raw));
- }
- if (b1->flags & VLIB_BUFFER_IS_TRACED)
- {
- ethernet_header_t *h1 = vlib_buffer_get_current (b1);
- l2_efp_filter_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);
- clib_memcpy (t->raw, &h1->type, sizeof (t->raw));
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- /* if next0==next1==next_index then nothing special needs to be done */
- 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;
- u32 feature_bitmap0;
- u16 first_ethertype0;
- u16 outer_id0, inner_id0;
- u32 match_flags0;
- u32 port_sw_if_index0, subint_sw_if_index0;
- vnet_hw_interface_t *hi0;
- main_intf_t *main_intf0;
- vlan_intf_t *vlan_intf0;
- qinq_intf_t *qinq_intf0;
- u32 is_l20;
- __attribute__ ((unused)) u32 matched0;
- u8 error0;
-
- /* 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];
-
- /* process 1 packet */
- em->counters[node_counter_base_index +
- L2_EFP_FILTER_ERROR_L2_EFP_FILTER] += 1;
-
- /* Remove ourself from the feature bitmap */
- feature_bitmap0 =
- vnet_buffer (b0)->l2.feature_bitmap & ~L2OUTPUT_FEAT_EFP_FILTER;
-
- /* Determine next node */
- l2_output_dispatch (msm->vlib_main,
- msm->vnet_main,
- node,
- l2_efp_filter_node.index,
- &cached_sw_if_index,
- &cached_next_index,
- &msm->next_nodes,
- b0, sw_if_index0, feature_bitmap0, &next0);
-
- /* perform the efp filter check on one packet */
-
- extract_keys (msm->vnet_main,
- sw_if_index0,
- b0,
- &port_sw_if_index0,
- &first_ethertype0,
- &outer_id0, &inner_id0, &match_flags0);
-
- eth_vlan_table_lookups (&ethernet_main,
- msm->vnet_main,
- port_sw_if_index0,
- first_ethertype0,
- outer_id0,
- inner_id0,
- &hi0,
- &main_intf0, &vlan_intf0, &qinq_intf0);
-
- matched0 = eth_identify_subint (hi0,
- b0,
- match_flags0,
- main_intf0,
- vlan_intf0,
- qinq_intf0,
- &subint_sw_if_index0,
- &error0, &is_l20);
-
- if (PREDICT_FALSE (sw_if_index0 != subint_sw_if_index0))
- {
- /* Drop packet */
- next0 = L2_EFP_FILTER_NEXT_DROP;
- b0->error = node->errors[L2_EFP_FILTER_ERROR_DROP];
- }
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- ethernet_header_t *h0 = vlib_buffer_get_current (b0);
- l2_efp_filter_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);
- clib_memcpy (t->raw, &h0->type, sizeof (t->raw));
- }
-
- /* 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 (l2_efp_filter_node,static) = {
- .function = l2_efp_filter_node_fn,
- .name = "l2-efp-filter",
- .vector_size = sizeof (u32),
- .format_trace = format_l2_efp_filter_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(l2_efp_filter_error_strings),
- .error_strings = l2_efp_filter_error_strings,
-
- .n_next_nodes = L2_EFP_FILTER_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [L2_EFP_FILTER_NEXT_DROP] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FUNCTION_MULTIARCH (l2_efp_filter_node, l2_efp_filter_node_fn)
- clib_error_t *l2_efp_filter_init (vlib_main_t * vm)
-{
- l2_efp_filter_main_t *mp = &l2_efp_filter_main;
-
- mp->vlib_main = vm;
- mp->vnet_main = vnet_get_main ();
-
- /* Initialize the feature next-node indexes */
- feat_bitmap_init_next_nodes (vm,
- l2_efp_filter_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 (l2_efp_filter_init);
-
-
-/** Enable/disable the EFP Filter check on the subinterface. */
-void
-l2_efp_filter_configure (vnet_main_t * vnet_main, u32 sw_if_index, u32 enable)
-{
- /* set the interface flag */
- l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_EFP_FILTER, enable);
-}
-
-
-/**
- * Set subinterface egress efp filter enable/disable.
- * The CLI format is:
- * set interface l2 efp-filter <interface> [disable]]
- */
-static clib_error_t *
-int_l2_efp_filter (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- clib_error_t *error = 0;
- u32 sw_if_index;
- u32 enable;
-
- if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
- {
- error = clib_error_return (0, "unknown interface `%U'",
- format_unformat_error, input);
- goto done;
- }
-
- enable = 1;
- if (unformat (input, "disable"))
- {
- enable = 0;
- }
-
- /* enable/disable the feature */
- l2_efp_filter_configure (vnm, sw_if_index, enable);
-
-done:
- return error;
-}
-
-
-/*?
- * EFP filtering is a basic switch feature which prevents an interface from
- * transmitting a packet that doesn't match the interface's ingress match
- * criteria. The check has two parts, one performed before egress vlan tag
- * rewrite and one after. This command enables or disables the EFP filtering
- * for a given sub-interface.
- *
- * @cliexpar
- * Example of how to enable a Layer 2 efp-filter on a sub-interface:
- * @cliexcmd{set interface l2 efp-filter GigabitEthernet0/8/0.200}
- * Example of how to disable a Layer 2 efp-filter on a sub-interface:
- * @cliexcmd{set interface l2 efp-filter GigabitEthernet0/8/0.200 disable}
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (int_l2_efp_filter_cli, static) = {
- .path = "set interface l2 efp-filter",
- .short_help = "set interface l2 efp-filter <interface> [disable]",
- .function = int_l2_efp_filter,
-};
-/* *INDENT-ON* */
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */