diff options
Diffstat (limited to 'src/plugins')
| -rw-r--r-- | src/plugins/acl/dataplane_node.c | 399 |
1 files changed, 191 insertions, 208 deletions
diff --git a/src/plugins/acl/dataplane_node.c b/src/plugins/acl/dataplane_node.c index 58db6f7c8a6..5393091f26f 100644 --- a/src/plugins/acl/dataplane_node.c +++ b/src/plugins/acl/dataplane_node.c @@ -73,8 +73,7 @@ acl_fa_node_fn (vlib_main_t * vm, int is_input, int is_l2_path, u32 * l2_feat_next_node_index, vlib_node_registration_t * acl_fa_node) { - u32 n_left_from, *from, *to_next; - acl_fa_next_t next_index; + u32 n_left, *from; u32 pkts_acl_checked = 0; u32 pkts_new_session = 0; u32 pkts_exist_session = 0; @@ -89,245 +88,229 @@ acl_fa_node_fn (vlib_main_t * vm, uword thread_index = os_get_thread_index (); acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index]; + u16 nexts[VLIB_FRAME_SIZE], *next; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; error_node = vlib_node_get_runtime (vm, acl_fa_node->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 > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = 0; - u8 action = 0; - u32 sw_if_index0; - u32 lc_index0; - int acl_check_needed = 1; - u32 match_acl_in_index = ~0; - u32 match_acl_pos = ~0; - u32 match_rule_index = ~0; - u8 error0 = 0; - - /* 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); - - if (is_input) - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - else - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; + vlib_get_buffers (vm, from, bufs, frame->n_vectors); + /* set the initial values for the current buffer the next pointers */ + b = bufs; + next = nexts; - if (is_input) - lc_index0 = am->input_lc_index_by_sw_if_index[sw_if_index0]; - else - lc_index0 = am->output_lc_index_by_sw_if_index[sw_if_index0]; - - u32 **p_epoch_vec = - is_input ? &am->input_policy_epoch_by_sw_if_index : - &am->output_policy_epoch_by_sw_if_index; - u16 current_policy_epoch = - sw_if_index0 < vec_len (*p_epoch_vec) ? vec_elt (*p_epoch_vec, - sw_if_index0) - : (is_input * FA_POLICY_EPOCH_IS_INPUT); - /* - * Extract the L3/L4 matching info into a 5-tuple structure. - */ - - acl_plugin_fill_5tuple_inline (lc_index0, b0, is_ip6, is_input, - is_l2_path, - (fa_5tuple_opaque_t *) & fa_5tuple); - fa_5tuple.l4.lsb_of_sw_if_index = sw_if_index0 & 0xffff; - fa_5tuple.pkt.mask_type_index_lsb = ~0; + n_left = frame->n_vectors; + while (n_left > 0) + { + u32 next0 = 0; + u8 action = 0; + u32 sw_if_index0; + u32 lc_index0 = ~0; + int acl_check_needed = 1; + u32 match_acl_in_index = ~0; + u32 match_acl_pos = ~0; + u32 match_rule_index = ~0; + u8 error0 = 0; + + n_left -= 1; + + if (is_input) + sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; + else + sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; + + if (is_input) + lc_index0 = am->input_lc_index_by_sw_if_index[sw_if_index0]; + else + lc_index0 = am->output_lc_index_by_sw_if_index[sw_if_index0]; + + + u32 **p_epoch_vec = + is_input ? &am->input_policy_epoch_by_sw_if_index : + &am->output_policy_epoch_by_sw_if_index; + u16 current_policy_epoch = + sw_if_index0 < vec_len (*p_epoch_vec) ? vec_elt (*p_epoch_vec, + sw_if_index0) + : (is_input * FA_POLICY_EPOCH_IS_INPUT); + /* + * Extract the L3/L4 matching info into a 5-tuple structure. + */ + + acl_plugin_fill_5tuple_inline (lc_index0, b[0], is_ip6, is_input, + is_l2_path, + (fa_5tuple_opaque_t *) & fa_5tuple); + fa_5tuple.l4.lsb_of_sw_if_index = sw_if_index0 & 0xffff; + fa_5tuple.pkt.mask_type_index_lsb = ~0; #ifdef FA_NODE_VERBOSE_DEBUG - clib_warning - ("ACL_FA_NODE_DBG: packet 5-tuple %016llx %016llx %016llx %016llx %016llx %016llx", - fa_5tuple.kv.key[0], fa_5tuple.kv.key[1], fa_5tuple.kv.key[2], - fa_5tuple.kv.key[3], fa_5tuple.kv.key[4], fa_5tuple.kv.value); + clib_warning + ("ACL_FA_NODE_DBG: packet 5-tuple %016llx %016llx %016llx %016llx %016llx %016llx", + fa_5tuple.kv.key[0], fa_5tuple.kv.key[1], fa_5tuple.kv.key[2], + fa_5tuple.kv.key[3], fa_5tuple.kv.key[4], fa_5tuple.kv.value); #endif - /* Try to match an existing session first */ + /* Try to match an existing session first */ - if (acl_fa_ifc_has_sessions (am, sw_if_index0)) + if (acl_fa_ifc_has_sessions (am, sw_if_index0)) + { + if (acl_fa_find_session (am, sw_if_index0, &fa_5tuple, &value_sess)) { - if (acl_fa_find_session - (am, sw_if_index0, &fa_5tuple, &value_sess)) + trace_bitmap |= 0x80000000; + error0 = ACL_FA_ERROR_ACL_EXIST_SESSION; + fa_full_session_id_t f_sess_id; + + f_sess_id.as_u64 = value_sess.value; + ASSERT (f_sess_id.thread_index < vec_len (vlib_mains)); + + fa_session_t *sess = + get_session_ptr (am, f_sess_id.thread_index, + f_sess_id.session_index); + int old_timeout_type = fa_session_get_timeout_type (am, sess); + action = + acl_fa_track_session (am, is_input, sw_if_index0, now, + sess, &fa_5tuple); + /* expose the session id to the tracer */ + match_rule_index = f_sess_id.session_index; + int new_timeout_type = fa_session_get_timeout_type (am, sess); + acl_check_needed = 0; + pkts_exist_session += 1; + /* Tracking might have changed the session timeout type, e.g. from transient to established */ + if (PREDICT_FALSE (old_timeout_type != new_timeout_type)) { - trace_bitmap |= 0x80000000; - error0 = ACL_FA_ERROR_ACL_EXIST_SESSION; - fa_full_session_id_t f_sess_id; - - f_sess_id.as_u64 = value_sess.value; - ASSERT (f_sess_id.thread_index < vec_len (vlib_mains)); - - fa_session_t *sess = - get_session_ptr (am, f_sess_id.thread_index, - f_sess_id.session_index); - int old_timeout_type = - fa_session_get_timeout_type (am, sess); - action = - acl_fa_track_session (am, is_input, sw_if_index0, now, - sess, &fa_5tuple); - /* expose the session id to the tracer */ - match_rule_index = f_sess_id.session_index; - int new_timeout_type = - fa_session_get_timeout_type (am, sess); + acl_fa_restart_timer_for_session (am, now, f_sess_id); + pkts_restart_session_timer++; + trace_bitmap |= + 0x00010000 + ((0xff & old_timeout_type) << 8) + + (0xff & new_timeout_type); + } + /* + * I estimate the likelihood to be very low - the VPP needs + * to have >64K interfaces to start with and then on + * exactly 64K indices apart needs to be exactly the same + * 5-tuple... Anyway, since this probability is nonzero - + * print an error and drop the unlucky packet. + * If this shows up in real world, we would need to bump + * the hash key length. + */ + if (PREDICT_FALSE (sess->sw_if_index != sw_if_index0)) + { + clib_warning + ("BUG: session LSB16(sw_if_index) and 5-tuple collision!"); acl_check_needed = 0; - pkts_exist_session += 1; - /* Tracking might have changed the session timeout type, e.g. from transient to established */ - if (PREDICT_FALSE (old_timeout_type != new_timeout_type)) - { - acl_fa_restart_timer_for_session (am, now, f_sess_id); - pkts_restart_session_timer++; - trace_bitmap |= - 0x00010000 + ((0xff & old_timeout_type) << 8) + - (0xff & new_timeout_type); - } - /* - * I estimate the likelihood to be very low - the VPP needs - * to have >64K interfaces to start with and then on - * exactly 64K indices apart needs to be exactly the same - * 5-tuple... Anyway, since this probability is nonzero - - * print an error and drop the unlucky packet. - * If this shows up in real world, we would need to bump - * the hash key length. - */ - if (PREDICT_FALSE (sess->sw_if_index != sw_if_index0)) - { - clib_warning - ("BUG: session LSB16(sw_if_index) and 5-tuple collision!"); - acl_check_needed = 0; - action = 0; - } - if (PREDICT_FALSE (am->reclassify_sessions)) + action = 0; + } + if (PREDICT_FALSE (am->reclassify_sessions)) + { + /* if the MSB of policy epoch matches but not the LSB means it is a stale session */ + if ((0 == + ((current_policy_epoch ^ + f_sess_id.intf_policy_epoch) & + FA_POLICY_EPOCH_IS_INPUT)) + && (current_policy_epoch != + f_sess_id.intf_policy_epoch)) { - /* if the MSB of policy epoch matches but not the LSB means it is a stale session */ - if ((0 == - ((current_policy_epoch ^ - f_sess_id.intf_policy_epoch) & - FA_POLICY_EPOCH_IS_INPUT)) - && (current_policy_epoch != - f_sess_id.intf_policy_epoch)) + /* delete session and increment the counter */ + vec_validate + (pw->fa_session_epoch_change_by_sw_if_index, + sw_if_index0); + vec_elt (pw->fa_session_epoch_change_by_sw_if_index, + sw_if_index0)++; + if (acl_fa_conn_list_delete_session (am, f_sess_id)) { - /* delete session and increment the counter */ - vec_validate - (pw->fa_session_epoch_change_by_sw_if_index, - sw_if_index0); - vec_elt (pw->fa_session_epoch_change_by_sw_if_index, - sw_if_index0)++; - if (acl_fa_conn_list_delete_session (am, f_sess_id)) - { - /* delete the session only if we were able to unlink it */ - acl_fa_delete_session (am, sw_if_index0, - f_sess_id); - } - acl_check_needed = 1; - trace_bitmap |= 0x40000000; + /* delete the session only if we were able to unlink it */ + acl_fa_delete_session (am, sw_if_index0, f_sess_id); } + acl_check_needed = 1; + trace_bitmap |= 0x40000000; } } } + } - if (acl_check_needed) + if (acl_check_needed) + { + action = 0; /* deny by default */ + acl_plugin_match_5tuple_inline (lc_index0, + (fa_5tuple_opaque_t *) & + fa_5tuple, is_ip6, &action, + &match_acl_pos, + &match_acl_in_index, + &match_rule_index, &trace_bitmap); + error0 = action; + if (1 == action) + pkts_acl_permit += 1; + if (2 == action) { - action = 0; /* deny by default */ - acl_plugin_match_5tuple_inline (lc_index0, - (fa_5tuple_opaque_t *) & - fa_5tuple, is_ip6, &action, - &match_acl_pos, - &match_acl_in_index, - &match_rule_index, - &trace_bitmap); - error0 = action; - if (1 == action) - pkts_acl_permit += 1; - if (2 == action) - { - if (!acl_fa_can_add_session (am, is_input, sw_if_index0)) - acl_fa_try_recycle_session (am, is_input, thread_index, - sw_if_index0); + if (!acl_fa_can_add_session (am, is_input, sw_if_index0)) + acl_fa_try_recycle_session (am, is_input, thread_index, + sw_if_index0); - if (acl_fa_can_add_session (am, is_input, sw_if_index0)) - { - fa_session_t *sess = - acl_fa_add_session (am, is_input, is_ip6, - sw_if_index0, - now, &fa_5tuple, - current_policy_epoch); - acl_fa_track_session (am, is_input, sw_if_index0, - now, sess, &fa_5tuple); - pkts_new_session += 1; - } - else - { - action = 0; - error0 = ACL_FA_ERROR_ACL_TOO_MANY_SESSIONS; - } + if (acl_fa_can_add_session (am, is_input, sw_if_index0)) + { + fa_session_t *sess = + acl_fa_add_session (am, is_input, is_ip6, + sw_if_index0, + now, &fa_5tuple, + current_policy_epoch); + acl_fa_track_session (am, is_input, sw_if_index0, + now, sess, &fa_5tuple); + pkts_new_session += 1; + } + else + { + action = 0; + error0 = ACL_FA_ERROR_ACL_TOO_MANY_SESSIONS; } } + } - if (action > 0) - { - if (is_l2_path) - next0 = vnet_l2_feature_next (b0, l2_feat_next_node_index, 0); - else - vnet_feature_next (sw_if_index0, &next0, b0); - } + if (action > 0) + { + if (is_l2_path) + next0 = vnet_l2_feature_next (b[0], l2_feat_next_node_index, 0); + else + vnet_feature_next (sw_if_index0, &next0, b[0]); + } #ifdef FA_NODE_VERBOSE_DEBUG - clib_warning - ("ACL_FA_NODE_DBG: sw_if_index %d lc_index %d action %d acl_index %d rule_index %d", - sw_if_index0, lc_index0, action, match_acl_in_index, - match_rule_index); + clib_warning + ("ACL_FA_NODE_DBG: sw_if_index %d lc_index %d action %d acl_index %d rule_index %d", + sw_if_index0, lc_index0, action, match_acl_in_index, + match_rule_index); #endif - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - acl_fa_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->lc_index = lc_index0; - t->next_index = next0; - t->match_acl_in_index = match_acl_in_index; - t->match_rule_index = match_rule_index; - t->packet_info[0] = fa_5tuple.kv.key[0]; - t->packet_info[1] = fa_5tuple.kv.key[1]; - t->packet_info[2] = fa_5tuple.kv.key[2]; - t->packet_info[3] = fa_5tuple.kv.key[3]; - t->packet_info[4] = fa_5tuple.kv.key[4]; - t->packet_info[5] = fa_5tuple.kv.value; - t->action = action; - t->trace_bitmap = trace_bitmap; - } - - next0 = next0 < node->n_next_nodes ? next0 : 0; - if (0 == next0) - b0->error = error_node->errors[error0]; - - pkts_acl_checked += 1; - - /* 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); + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) + { + acl_fa_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->lc_index = lc_index0; + t->next_index = next0; + t->match_acl_in_index = match_acl_in_index; + t->match_rule_index = match_rule_index; + t->packet_info[0] = fa_5tuple.kv.key[0]; + t->packet_info[1] = fa_5tuple.kv.key[1]; + t->packet_info[2] = fa_5tuple.kv.key[2]; + t->packet_info[3] = fa_5tuple.kv.key[3]; + t->packet_info[4] = fa_5tuple.kv.key[4]; + t->packet_info[5] = fa_5tuple.kv.value; + t->action = action; + t->trace_bitmap = trace_bitmap; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + next0 = next0 < node->n_next_nodes ? next0 : 0; + if (0 == next0) + b[0]->error = error_node->errors[error0]; + next[0] = next0; + + next++; + b++; + pkts_acl_checked += 1; } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + vlib_node_increment_counter (vm, acl_fa_node->index, ACL_FA_ERROR_ACL_CHECK, pkts_acl_checked); vlib_node_increment_counter (vm, acl_fa_node->index, |