diff options
Diffstat (limited to 'src/vnet/ip/ip_in_out_acl.c')
| -rw-r--r-- | src/vnet/ip/ip_in_out_acl.c | 589 |
1 files changed, 589 insertions, 0 deletions
diff --git a/src/vnet/ip/ip_in_out_acl.c b/src/vnet/ip/ip_in_out_acl.c new file mode 100644 index 00000000000..b50f5b1ff67 --- /dev/null +++ b/src/vnet/ip/ip_in_out_acl.c @@ -0,0 +1,589 @@ +/* + * 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 <vnet/ip/ip.h> +#include <vnet/classify/vnet_classify.h> +#include <vnet/classify/in_out_acl.h> + +typedef struct +{ + u32 sw_if_index; + u32 next_index; + u32 table_index; + u32 offset; +} ip_in_out_acl_trace_t; + +/* packet trace format function */ +static u8 * +format_ip_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 *); + ip_in_out_acl_trace_t *t = va_arg (*args, ip_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_ip_inacl_trace (u8 * s, va_list * args) +{ + return format_ip_in_out_acl_trace (s, 0 /* is_output */ , args); +} + +static u8 * +format_ip_outacl_trace (u8 * s, va_list * args) +{ + return format_ip_in_out_acl_trace (s, 1 /* is_output */ , args); +} + +vlib_node_registration_t ip4_inacl_node; +vlib_node_registration_t ip4_outacl_node; +vlib_node_registration_t ip6_inacl_node; +vlib_node_registration_t ip6_outacl_node; + +#define foreach_ip_inacl_error \ +_(MISS, "input ACL misses") \ +_(HIT, "input ACL hits") \ +_(CHAIN_HIT, "input ACL hits after chain walk") + +#define foreach_ip_outacl_error \ +_(MISS, "output ACL misses") \ +_(HIT, "output ACL hits") \ +_(CHAIN_HIT, "output ACL hits after chain walk") + +typedef enum +{ +#define _(sym,str) IP_INACL_ERROR_##sym, + foreach_ip_inacl_error +#undef _ + IP_INACL_N_ERROR, +} ip_inacl_error_t; + +static char *ip_inacl_error_strings[] = { +#define _(sym,string) string, + foreach_ip_inacl_error +#undef _ +}; + +typedef enum +{ +#define _(sym,str) IP_OUTACL_ERROR_##sym, + foreach_ip_outacl_error +#undef _ + IP_OUTACL_N_ERROR, +} ip_outacl_error_t; + +static char *ip_outacl_error_strings[] = { +#define _(sym,string) string, + foreach_ip_outacl_error +#undef _ +}; + +static inline uword +ip_in_out_acl_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame, + int is_ip4, int is_output) +{ + u32 n_left_from, *from, *to_next; + acl_next_index_t next_index; + in_out_acl_main_t *am = &in_out_acl_main; + vnet_classify_main_t *vcm = am->vnet_classify_main; + f64 now = vlib_time_now (vm); + u32 hits = 0; + u32 misses = 0; + u32 chain_hits = 0; + in_out_acl_table_id_t tid; + vlib_node_runtime_t *error_node; + u32 n_next_nodes; + + n_next_nodes = node->n_next_nodes; + + if (is_ip4) + { + tid = IN_OUT_ACL_TABLE_IP4; + error_node = vlib_node_get_runtime (vm, ip4_input_node.index); + } + else + { + tid = IN_OUT_ACL_TABLE_IP6; + error_node = vlib_node_get_runtime (vm, ip6_input_node.index); + } + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + + /* 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; + + if (is_output) + { + /* Save the rewrite length, since we are using the l2_classify struct */ + vnet_buffer (b0)->l2_classify.pad.l2_len = + vnet_buffer (b0)->ip.save_rewrite_length; + /* advance the match pointer so the matching happens on IP header */ + h0 += vnet_buffer (b0)->l2_classify.pad.l2_len; + } + + 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; + + if (is_output) + { + /* Save the rewrite length, since we are using the l2_classify struct */ + vnet_buffer (b1)->l2_classify.pad.l2_len = + vnet_buffer (b1)->ip.save_rewrite_length; + /* advance the match pointer so the matching happens on IP header */ + h1 += vnet_buffer (b1)->l2_classify.pad.l2_len; + } + + 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; + + if (is_output) + { + /* Save the rewrite length, since we are using the l2_classify struct */ + vnet_buffer (b0)->l2_classify.pad.l2_len = + vnet_buffer (b0)->ip.save_rewrite_length; + /* advance the match pointer so the matching happens on IP header */ + h0 += vnet_buffer (b0)->l2_classify.pad.l2_len; + } + + 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_get_config_data (am->vnet_config_main[is_output][tid], + &b0->current_config_index, &next0, + /* # bytes of config data */ 0); + + vnet_buffer (b0)->l2_classify.opaque_index = ~0; + + 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; + + /* advance the match pointer so the matching happens on IP header */ + if (is_output) + h0 += vnet_buffer (b0)->l2_classify.pad.l2_len; + + 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 < n_next_nodes) ? + e0->next_index : next0; + + hits++; + + if (is_ip4) + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP4_ERROR_OUTACL_SESSION_DENY : + IP4_ERROR_INACL_SESSION_DENY) : IP4_ERROR_NONE; + else + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP6_ERROR_OUTACL_SESSION_DENY : + IP6_ERROR_INACL_SESSION_DENY) : IP6_ERROR_NONE; + b0->error = error_node->errors[error0]; + + if (!is_output) + { + if (e0->action == CLASSIFY_ACTION_SET_IP4_FIB_INDEX || + e0->action == CLASSIFY_ACTION_SET_IP6_FIB_INDEX) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = e0->metadata; + else if (e0->action == CLASSIFY_ACTION_SET_METADATA) + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = + e0->metadata; + } + } + 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 < n_next_nodes) ? + t0->miss_next_index : next0; + + misses++; + + if (is_ip4) + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP4_ERROR_OUTACL_TABLE_MISS : + IP4_ERROR_INACL_TABLE_MISS) : IP4_ERROR_NONE; + else + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP6_ERROR_OUTACL_TABLE_MISS : + IP6_ERROR_INACL_TABLE_MISS) : IP6_ERROR_NONE; + b0->error = 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) + { + vnet_buffer (b0)->l2_classify.opaque_index + = e0->opaque_index; + vlib_buffer_advance (b0, e0->advance); + next0 = (e0->next_index < n_next_nodes) ? + e0->next_index : next0; + hits++; + chain_hits++; + + if (is_ip4) + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP4_ERROR_OUTACL_SESSION_DENY : + IP4_ERROR_INACL_SESSION_DENY) : IP4_ERROR_NONE; + else + error0 = (next0 == ACL_NEXT_INDEX_DENY) ? + (is_output ? IP6_ERROR_OUTACL_SESSION_DENY : + IP6_ERROR_INACL_SESSION_DENY) : IP6_ERROR_NONE; + b0->error = error_node->errors[error0]; + + if (e0->action == CLASSIFY_ACTION_SET_IP4_FIB_INDEX + || e0->action == + CLASSIFY_ACTION_SET_IP6_FIB_INDEX) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = + e0->metadata; + break; + } + } + } + } + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + ip_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 = (e0 && t0) ? vnet_classify_get_offset (t0, e0) : ~0; + } + + if ((next0 == ACL_NEXT_INDEX_DENY) && is_output) + { + /* on output, for the drop node to work properly, go back to ip header */ + vlib_buffer_advance (b0, vnet_buffer (b0)->l2.l2_len); + } + + /* 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 ? IP_OUTACL_ERROR_MISS : + IP_INACL_ERROR_MISS, misses); + vlib_node_increment_counter (vm, node->node_index, + is_output ? IP_OUTACL_ERROR_HIT : + IP_INACL_ERROR_HIT, hits); + vlib_node_increment_counter (vm, node->node_index, + is_output ? IP_OUTACL_ERROR_CHAIN_HIT : + IP_INACL_ERROR_CHAIN_HIT, chain_hits); + return frame->n_vectors; +} + +static uword +ip4_inacl (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ip_in_out_acl_inline (vm, node, frame, 1 /* is_ip4 */ , + 0 /* is_output */ ); +} + +static uword +ip4_outacl (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_in_out_acl_inline (vm, node, frame, 1 /* is_ip4 */ , + 1 /* is_output */ ); +} + + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip4_inacl_node) = { + .function = ip4_inacl, + .name = "ip4-inacl", + .vector_size = sizeof (u32), + .format_trace = format_ip_inacl_trace, + .n_errors = ARRAY_LEN(ip_inacl_error_strings), + .error_strings = ip_inacl_error_strings, + + .n_next_nodes = ACL_NEXT_INDEX_N_NEXT, + .next_nodes = { + [ACL_NEXT_INDEX_DENY] = "ip4-drop", + }, +}; + +VLIB_REGISTER_NODE (ip4_outacl_node) = { + .function = ip4_outacl, + .name = "ip4-outacl", + .vector_size = sizeof (u32), + .format_trace = format_ip_outacl_trace, + .n_errors = ARRAY_LEN(ip_outacl_error_strings), + .error_strings = ip_outacl_error_strings, + + .n_next_nodes = ACL_NEXT_INDEX_N_NEXT, + .next_nodes = { + [ACL_NEXT_INDEX_DENY] = "ip4-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (ip4_inacl_node, ip4_inacl); +VLIB_NODE_FUNCTION_MULTIARCH (ip4_outacl_node, ip4_outacl); + +static uword +ip6_inacl (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return ip_in_out_acl_inline (vm, node, frame, 0 /* is_ip4 */ , + 0 /* is_output */ ); +} + +static uword +ip6_outacl (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_in_out_acl_inline (vm, node, frame, 0 /* is_ip4 */ , + 1 /* is_output */ ); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_inacl_node) = { + .function = ip6_inacl, + .name = "ip6-inacl", + .vector_size = sizeof (u32), + .format_trace = format_ip_inacl_trace, + .n_errors = ARRAY_LEN(ip_inacl_error_strings), + .error_strings = ip_inacl_error_strings, + + .n_next_nodes = ACL_NEXT_INDEX_N_NEXT, + .next_nodes = { + [ACL_NEXT_INDEX_DENY] = "ip6-drop", + }, +}; + +VLIB_REGISTER_NODE (ip6_outacl_node) = { + .function = ip6_outacl, + .name = "ip6-outacl", + .vector_size = sizeof (u32), + .format_trace = format_ip_outacl_trace, + .n_errors = ARRAY_LEN(ip_outacl_error_strings), + .error_strings = ip_outacl_error_strings, + + .n_next_nodes = ACL_NEXT_INDEX_N_NEXT, + .next_nodes = { + [ACL_NEXT_INDEX_DENY] = "ip6-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_inacl_node, ip6_inacl); +VLIB_NODE_FUNCTION_MULTIARCH (ip6_outacl_node, ip6_outacl); + +static clib_error_t * +ip_in_out_acl_init (vlib_main_t * vm) +{ + return 0; +} + +VLIB_INIT_FUNCTION (ip_in_out_acl_init); + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |