--- /dev/null
+/*
+ * l2_in_out_acl.c : layer 2 input/output acl processing
+ *
+ * Copyright (c) 2013,2018 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 <vnet/ethernet/packet.h>
+#include <vnet/ip/ip_packet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vlib/cli.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/l2_output.h>
+#include <vnet/l2/feat_bitmap.h>
+
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/cache.h>
+
+#include <vnet/classify/vnet_classify.h>
+#include <vnet/classify/in_out_acl.h>
+
+typedef struct
+{
+
+ /* Next nodes for each feature */
+ u32 feat_next_node_index[IN_OUT_ACL_N_TABLE_GROUPS][32];
+
+ /* convenience variables */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+} l2_in_out_acl_main_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 table_index;
+ u32 offset;
+} l2_in_out_acl_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_l2_in_out_acl_trace (u8 * s, u32 is_output, 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_in_out_acl_trace_t *t = va_arg (*args, l2_in_out_acl_trace_t *);
+
+ s = format (s, "%s: sw_if_index %d, next_index %d, table %d, offset %d",
+ is_output ? "OUTACL" : "INACL",
+ t->sw_if_index, t->next_index, t->table_index, t->offset);
+ return s;
+}
+
+static u8 *
+format_l2_inacl_trace (u8 * s, va_list * args)
+{
+ return format_l2_in_out_acl_trace (s, IN_OUT_ACL_INPUT_TABLE_GROUP, args);
+}
+
+static u8 *
+format_l2_outacl_trace (u8 * s, va_list * args)
+{
+ return format_l2_in_out_acl_trace (s, IN_OUT_ACL_OUTPUT_TABLE_GROUP, args);
+}
+
+l2_in_out_acl_main_t l2_in_out_acl_main;
+
+static vlib_node_registration_t l2_inacl_node;
+static vlib_node_registration_t l2_outacl_node;
+
+#define foreach_l2_inacl_error \
+_(NONE, "valid input ACL packets") \
+_(MISS, "input ACL misses") \
+_(HIT, "input ACL hits") \
+_(CHAIN_HIT, "input ACL hits after chain walk") \
+_(TABLE_MISS, "input ACL table-miss drops") \
+_(SESSION_DENY, "input ACL session deny drops")
+
+#define foreach_l2_outacl_error \
+_(NONE, "valid output ACL packets") \
+_(MISS, "output ACL misses") \
+_(HIT, "output ACL hits") \
+_(CHAIN_HIT, "output ACL hits after chain walk") \
+_(TABLE_MISS, "output ACL table-miss drops") \
+_(SESSION_DENY, "output ACL session deny drops")
+
+
+typedef enum
+{
+#define _(sym,str) L2_INACL_ERROR_##sym,
+ foreach_l2_inacl_error
+#undef _
+ L2_INACL_N_ERROR,
+} l2_inacl_error_t;
+
+static char *l2_inacl_error_strings[] = {
+#define _(sym,string) string,
+ foreach_l2_inacl_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) L2_OUTACL_ERROR_##sym,
+ foreach_l2_outacl_error
+#undef _
+ L2_OUTACL_N_ERROR,
+} l2_outacl_error_t;
+
+static char *l2_outacl_error_strings[] = {
+#define _(sym,string) string,
+ foreach_l2_outacl_error
+#undef _
+};
+
+
+static inline uword
+l2_in_out_acl_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame,
+ int is_output)
+{
+ u32 n_left_from, *from, *to_next;
+ acl_next_index_t next_index;
+ l2_in_out_acl_main_t *msm = &l2_in_out_acl_main;
+ in_out_acl_main_t *am = &in_out_acl_main;
+ vnet_classify_main_t *vcm = am->vnet_classify_main;
+ in_out_acl_table_id_t tid = IN_OUT_ACL_TABLE_L2;
+ f64 now = vlib_time_now (vm);
+ u32 hits = 0;
+ u32 misses = 0;
+ u32 chain_hits = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors; /* number of packets to process */
+ next_index = node->cached_next_index;
+
+ /* First pass: compute hashes */
+ while (n_left_from > 2)
+ {
+ vlib_buffer_t *b0, *b1;
+ u32 bi0, bi1;
+ u8 *h0, *h1;
+ u32 sw_if_index0, sw_if_index1;
+ u32 table_index0, table_index1;
+ vnet_classify_table_t *t0, *t1;
+
+ /* prefetch next iteration */
+ {
+ vlib_buffer_t *p1, *p2;
+
+ p1 = vlib_get_buffer (vm, from[1]);
+ p2 = vlib_get_buffer (vm, from[2]);
+
+ vlib_prefetch_buffer_header (p1, STORE);
+ CLIB_PREFETCH (p1->data, CLIB_CACHE_LINE_BYTES, STORE);
+ vlib_prefetch_buffer_header (p2, STORE);
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+
+ bi1 = from[1];
+ b1 = vlib_get_buffer (vm, bi1);
+
+ sw_if_index0 =
+ vnet_buffer (b0)->sw_if_index[is_output ? VLIB_TX : VLIB_RX];
+ table_index0 =
+ am->classify_table_index_by_sw_if_index[is_output][tid][sw_if_index0];
+
+ sw_if_index1 =
+ vnet_buffer (b1)->sw_if_index[is_output ? VLIB_TX : VLIB_RX];
+ table_index1 =
+ am->classify_table_index_by_sw_if_index[is_output][tid][sw_if_index1];
+
+ t0 = pool_elt_at_index (vcm->tables, table_index0);
+
+ t1 = pool_elt_at_index (vcm->tables, table_index1);
+
+ if (t0->current_data_flag == CLASSIFY_FLAG_USE_CURR_DATA)
+ h0 = (void *) vlib_buffer_get_current (b0) + t0->current_data_offset;
+ else
+ h0 = b0->data;
+
+ vnet_buffer (b0)->l2_classify.hash =
+ vnet_classify_hash_packet (t0, (u8 *) h0);
+
+ vnet_classify_prefetch_bucket (t0, vnet_buffer (b0)->l2_classify.hash);
+
+ if (t1->current_data_flag == CLASSIFY_FLAG_USE_CURR_DATA)
+ h1 = (void *) vlib_buffer_get_current (b1) + t1->current_data_offset;
+ else
+ h1 = b1->data;
+
+ vnet_buffer (b1)->l2_classify.hash =
+ vnet_classify_hash_packet (t1, (u8 *) h1);
+
+ vnet_classify_prefetch_bucket (t1, vnet_buffer (b1)->l2_classify.hash);
+
+ vnet_buffer (b0)->l2_classify.table_index = table_index0;
+
+ vnet_buffer (b1)->l2_classify.table_index = table_index1;
+
+ from += 2;
+ n_left_from -= 2;
+ }
+
+ while (n_left_from > 0)
+ {
+ vlib_buffer_t *b0;
+ u32 bi0;
+ u8 *h0;
+ u32 sw_if_index0;
+ u32 table_index0;
+ vnet_classify_table_t *t0;
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+
+ sw_if_index0 =
+ vnet_buffer (b0)->sw_if_index[is_output ? VLIB_TX : VLIB_RX];
+ table_index0 =
+ am->classify_table_index_by_sw_if_index[is_output][tid][sw_if_index0];
+
+ t0 = pool_elt_at_index (vcm->tables, table_index0);
+
+ if (t0->current_data_flag == CLASSIFY_FLAG_USE_CURR_DATA)
+ h0 = (void *) vlib_buffer_get_current (b0) + t0->current_data_offset;
+ else
+ h0 = b0->data;
+
+ vnet_buffer (b0)->l2_classify.hash =
+ vnet_classify_hash_packet (t0, (u8 *) h0);
+
+ vnet_buffer (b0)->l2_classify.table_index = table_index0;
+ vnet_classify_prefetch_bucket (t0, vnet_buffer (b0)->l2_classify.hash);
+
+ from++;
+ n_left_from--;
+ }
+
+ next_index = node->cached_next_index;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ /* Not enough load/store slots to dual loop... */
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = ACL_NEXT_INDEX_DENY;
+ u32 table_index0;
+ vnet_classify_table_t *t0;
+ vnet_classify_entry_t *e0;
+ u64 hash0;
+ u8 *h0;
+ u8 error0;
+
+ /* Stride 3 seems to work best */
+ if (PREDICT_TRUE (n_left_from > 3))
+ {
+ vlib_buffer_t *p1 = vlib_get_buffer (vm, from[3]);
+ vnet_classify_table_t *tp1;
+ u32 table_index1;
+ u64 phash1;
+
+ table_index1 = vnet_buffer (p1)->l2_classify.table_index;
+
+ if (PREDICT_TRUE (table_index1 != ~0))
+ {
+ tp1 = pool_elt_at_index (vcm->tables, table_index1);
+ phash1 = vnet_buffer (p1)->l2_classify.hash;
+ vnet_classify_prefetch_entry (tp1, phash1);
+ }
+ }
+
+ /* 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);
+
+ table_index0 = vnet_buffer (b0)->l2_classify.table_index;
+ e0 = 0;
+ t0 = 0;
+
+ vnet_buffer (b0)->l2_classify.opaque_index = ~0;
+
+ /* Determine the next node */
+ next0 =
+ vnet_l2_feature_next (b0, msm->feat_next_node_index[is_output],
+ is_output ? L2OUTPUT_FEAT_ACL :
+ L2INPUT_FEAT_ACL);
+
+ if (PREDICT_TRUE (table_index0 != ~0))
+ {
+ hash0 = vnet_buffer (b0)->l2_classify.hash;
+ t0 = pool_elt_at_index (vcm->tables, table_index0);
+
+ if (t0->current_data_flag == CLASSIFY_FLAG_USE_CURR_DATA)
+ h0 =
+ (void *) vlib_buffer_get_current (b0) +
+ t0->current_data_offset;
+ else
+ h0 = b0->data;
+
+ e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0, now);
+ if (e0)
+ {
+ vnet_buffer (b0)->l2_classify.opaque_index
+ = e0->opaque_index;
+ vlib_buffer_advance (b0, e0->advance);
+
+ next0 = (e0->next_index < ACL_NEXT_INDEX_N_NEXT) ?
+ e0->next_index : next0;
+
+ hits++;
+
+ if (is_output)
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_OUTACL_ERROR_SESSION_DENY : L2_INACL_ERROR_NONE;
+ else
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_OUTACL_ERROR_SESSION_DENY : L2_OUTACL_ERROR_NONE;
+ b0->error = node->errors[error0];
+ }
+ else
+ {
+ while (1)
+ {
+ if (PREDICT_TRUE (t0->next_table_index != ~0))
+ t0 = pool_elt_at_index (vcm->tables,
+ t0->next_table_index);
+ else
+ {
+ next0 =
+ (t0->miss_next_index <
+ ACL_NEXT_INDEX_N_NEXT) ? t0->miss_next_index :
+ next0;
+
+ misses++;
+
+ if (is_output)
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_OUTACL_ERROR_TABLE_MISS :
+ L2_OUTACL_ERROR_NONE;
+ else
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_INACL_ERROR_TABLE_MISS : L2_INACL_ERROR_NONE;
+ b0->error = node->errors[error0];
+ break;
+ }
+
+ if (t0->current_data_flag ==
+ CLASSIFY_FLAG_USE_CURR_DATA)
+ h0 =
+ (void *) vlib_buffer_get_current (b0) +
+ t0->current_data_offset;
+ else
+ h0 = b0->data;
+
+ hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
+ e0 = vnet_classify_find_entry
+ (t0, (u8 *) h0, hash0, now);
+ if (e0)
+ {
+ vlib_buffer_advance (b0, e0->advance);
+ next0 = (e0->next_index < ACL_NEXT_INDEX_N_NEXT) ?
+ e0->next_index : next0;
+ hits++;
+ chain_hits++;
+
+ if (is_output)
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_OUTACL_ERROR_SESSION_DENY :
+ L2_OUTACL_ERROR_NONE;
+ else
+ error0 = (next0 == ACL_NEXT_INDEX_DENY) ?
+ L2_INACL_ERROR_SESSION_DENY :
+ L2_INACL_ERROR_NONE;
+ b0->error = node->errors[error0];
+ break;
+ }
+ }
+ }
+ }
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ l2_in_out_acl_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index =
+ vnet_buffer (b0)->sw_if_index[is_output ? VLIB_TX : VLIB_RX];
+ t->next_index = next0;
+ t->table_index = t0 ? t0 - vcm->tables : ~0;
+ t->offset = (t0 && e0) ? vnet_classify_get_offset (t0, e0) : ~0;
+ }
+
+ /* 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);
+ }
+
+ vlib_node_increment_counter (vm, node->node_index,
+ is_output ? L2_OUTACL_ERROR_MISS :
+ L2_INACL_ERROR_MISS, misses);
+ vlib_node_increment_counter (vm, node->node_index,
+ is_output ? L2_OUTACL_ERROR_HIT :
+ L2_INACL_ERROR_HIT, hits);
+ vlib_node_increment_counter (vm, node->node_index,
+ is_output ? L2_OUTACL_ERROR_CHAIN_HIT :
+ L2_INACL_ERROR_CHAIN_HIT, chain_hits);
+ return frame->n_vectors;
+}
+
+static uword
+l2_inacl_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return l2_in_out_acl_node_fn (vm, node, frame,
+ IN_OUT_ACL_INPUT_TABLE_GROUP);
+}
+
+static uword
+l2_outacl_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return l2_in_out_acl_node_fn (vm, node, frame,
+ IN_OUT_ACL_OUTPUT_TABLE_GROUP);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (l2_inacl_node,static) = {
+ .function = l2_inacl_node_fn,
+ .name = "l2-input-acl",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2_inacl_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(l2_inacl_error_strings),
+ .error_strings = l2_inacl_error_strings,
+
+ .n_next_nodes = ACL_NEXT_INDEX_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [ACL_NEXT_INDEX_DENY] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (l2_outacl_node,static) = {
+ .function = l2_outacl_node_fn,
+ .name = "l2-output-acl",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2_outacl_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(l2_outacl_error_strings),
+ .error_strings = l2_outacl_error_strings,
+
+ .n_next_nodes = ACL_NEXT_INDEX_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [ACL_NEXT_INDEX_DENY] = "error-drop",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (l2_inacl_node, l2_inacl_node_fn)
+VLIB_NODE_FUNCTION_MULTIARCH (l2_outacl_node, l2_outacl_node_fn)
+/* *INDENT-ON* */
+
+
+clib_error_t *
+l2_in_out_acl_init (vlib_main_t * vm)
+{
+ l2_in_out_acl_main_t *mp = &l2_in_out_acl_main;
+
+ mp->vlib_main = vm;
+ mp->vnet_main = vnet_get_main ();
+
+ /* Initialize the feature next-node indexes */
+ feat_bitmap_init_next_nodes (vm,
+ l2_inacl_node.index,
+ L2INPUT_N_FEAT,
+ l2input_get_feat_names (),
+ mp->feat_next_node_index
+ [IN_OUT_ACL_INPUT_TABLE_GROUP]);
+ feat_bitmap_init_next_nodes (vm, l2_outacl_node.index, L2OUTPUT_N_FEAT,
+ l2output_get_feat_names (),
+ mp->feat_next_node_index
+ [IN_OUT_ACL_OUTPUT_TABLE_GROUP]);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (l2_in_out_acl_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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