/* * Copyright (c) 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 <vnet/ip/ip.h> #include <vnet/feature/feature.h> #include <vnet/qos/qos_egress_map.h> #include <vnet/qos/qos_mark.h> /** * per-interface vector of which MAP is used by which interface * for each output source */ index_t *qos_mark_configs[QOS_N_SOURCES]; void qos_mark_ip_enable_disable (u32 sw_if_index, u8 enable) { vnet_feature_enable_disable ("ip6-output", "ip6-qos-mark", sw_if_index, enable, NULL, 0); vnet_feature_enable_disable ("ip4-output", "ip4-qos-mark", sw_if_index, enable, NULL, 0); } void qos_mark_vlan_enable_disable (u32 sw_if_index, u8 enable) { vnet_feature_enable_disable ("interface-output", "vlan-qos-mark", sw_if_index, enable, NULL, 0); } void qos_mark_mpls_enable_disable (u32 sw_if_index, u8 enable) { vnet_feature_enable_disable ("mpls-output", "mpls-qos-mark", sw_if_index, enable, NULL, 0); } static void qos_egress_map_feature_config (u32 sw_if_index, qos_source_t qs, u8 enable) { switch (qs) { case QOS_SOURCE_EXT: ASSERT (0); break; case QOS_SOURCE_VLAN: qos_mark_vlan_enable_disable (sw_if_index, enable); break; case QOS_SOURCE_MPLS: qos_mark_mpls_enable_disable (sw_if_index, enable); break; case QOS_SOURCE_IP: qos_mark_ip_enable_disable (sw_if_index, enable); break; } } always_inline qos_egress_map_t * qos_egress_map_interface (u32 sw_if_index, qos_source_t output_source) { ASSERT (vec_len (qos_mark_configs[output_source]) > sw_if_index); return pool_elt_at_index (qem_pool, qos_mark_configs[output_source][sw_if_index]); } /** * per-packet trace data */ typedef struct qos_mark_trace_t_ { /* per-pkt trace data */ qos_bits_t bits; qos_source_t input; u32 used; } qos_mark_trace_t; static inline uword qos_mark_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, qos_source_t output_source, int is_ip6) { u32 n_left_from, *from, *to_next, next_index; next_index = 0; n_left_from = frame->n_vectors; from = vlib_frame_vector_args (frame); 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) { qos_source_t input_source0; ethernet_vlan_header_t *vlan0; u32 sw_if_index0, next0, bi0; qos_egress_map_t *qem0; ip4_header_t *ip4_0; ip6_header_t *ip6_0; vlib_buffer_t *b0; qos_bits_t qos0; u8 *mpls_bytes_0; u8 eos0; next0 = 0; 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]; input_source0 = vnet_buffer2 (b0)->qos.source; qem0 = qos_egress_map_interface (sw_if_index0, output_source); qos0 = qem0->qem_output[input_source0][vnet_buffer2 (b0)->qos.bits]; if (PREDICT_TRUE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID)) { /* there is a source of QoS recording for this packet */ if (QOS_SOURCE_IP == output_source) { if (is_ip6) { ip6_0 = (vlib_buffer_get_current (b0) + vnet_buffer (b0)->ip.save_rewrite_length); ip6_set_traffic_class_network_order (ip6_0, qos0); } else { ip4_0 = (vlib_buffer_get_current (b0) + vnet_buffer (b0)->ip.save_rewrite_length); if (PREDICT_FALSE (qos0 != ip4_0->tos)) { ip4_0->tos = qos0; ip4_0->checksum = ip4_header_checksum (ip4_0); } } } else if (QOS_SOURCE_MPLS == output_source) { mpls_bytes_0 = (vlib_buffer_get_current (b0) + vnet_buffer (b0)->mpls.save_rewrite_length); /* apply to all the labels in the stack */ do { /* clear out the old COS bts */ mpls_bytes_0[2] &= 0xf1; /* OR in 3 bits of the mapped value */ mpls_bytes_0[2] |= (qos0 & 0x7) << 1; eos0 = mpls_bytes_0[2] & 0x1; mpls_bytes_0 += 4; } while (!eos0); } else if (QOS_SOURCE_VLAN == output_source) { vlan0 = (vlib_buffer_get_current (b0) + sizeof (ethernet_header_t)); ethernet_vlan_header_set_priority_net_order (vlan0, qos0); } } vnet_feature_next (sw_if_index0, &next0, b0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { qos_mark_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->bits = qos0; t->input = input_source0; t->used = (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID); } /* 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; } /* packet trace format function */ static u8 * format_qos_mark_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 *); qos_mark_trace_t *t = va_arg (*args, qos_mark_trace_t *); s = format (s, "source:%U qos:%d used:%s", format_qos_source, t->input, t->bits, (t->used ? "yes" : "no")); return s; } static inline uword ip4_qos_mark (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (qos_mark_inline (vm, node, frame, QOS_SOURCE_IP, 0)); } static inline uword ip6_qos_mark (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (qos_mark_inline (vm, node, frame, QOS_SOURCE_IP, 1)); } static inline uword mpls_qos_mark (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (qos_mark_inline (vm, node, frame, QOS_SOURCE_MPLS, 0)); } static inline uword vlan_qos_mark (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (qos_mark_inline (vm, node, frame, QOS_SOURCE_VLAN, 0)); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip4_qos_mark_node) = { .function = ip4_qos_mark, .name = "ip4-qos-mark", .vector_size = sizeof (u32), .format_trace = format_qos_mark_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, .n_next_nodes = 1, .next_nodes = { [0] = "ip4-drop", }, }; VLIB_NODE_FUNCTION_MULTIARCH (ip4_qos_mark_node, ip4_qos_mark); VNET_FEATURE_INIT (ip4_qos_mark_node, static) = { .arc_name = "ip4-output", .node_name = "ip4-qos-mark", }; VLIB_REGISTER_NODE (ip6_qos_mark_node) = { .function = ip6_qos_mark, .name = "ip6-qos-mark", .vector_size = sizeof (u32), .format_trace = format_qos_mark_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, .n_next_nodes = 1, .next_nodes = { [0] = "ip6-drop", }, }; VLIB_NODE_FUNCTION_MULTIARCH (ip6_qos_mark_node, ip6_qos_mark); VNET_FEATURE_INIT (ip6_qos_mark_node, static) = { .arc_name = "ip6-output", .node_name = "ip6-qos-mark", }; VLIB_REGISTER_NODE (mpls_qos_mark_node) = { .function = mpls_qos_mark, .name = "mpls-qos-mark", .vector_size = sizeof (u32), .format_trace = format_qos_mark_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, .n_next_nodes = 1, .next_nodes = { [0] = "mpls-drop", }, }; VLIB_NODE_FUNCTION_MULTIARCH (mpls_qos_mark_node, mpls_qos_mark); VNET_FEATURE_INIT (mpls_qos_mark_node, static) = { .arc_name = "mpls-output", .node_name = "mpls-qos-mark", }; VLIB_REGISTER_NODE (vlan_qos_mark_node) = { .function = vlan_qos_mark, .name = "vlan-qos-mark", .vector_size = sizeof (u32), .format_trace = format_qos_mark_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, .n_next_nodes = 1, .next_nodes = { [0] = "error-drop", }, }; VLIB_NODE_FUNCTION_MULTIARCH (vlan_qos_mark_node, vlan_qos_mark); VNET_FEATURE_INIT (vlan_qos_mark_node, static) = { .arc_name = "interface-output", .node_name = "vlan-qos-mark", }; /* *INDENT-ON* */ int qos_mark_enable (u32 sw_if_index, qos_source_t output_source, qos_egress_map_id_t mid) { index_t qemi; vec_validate_init_empty (qos_mark_configs[output_source], sw_if_index, INDEX_INVALID); qemi = qos_egress_map_find (mid); if (INDEX_INVALID == qemi) return VNET_API_ERROR_NO_SUCH_TABLE; if (INDEX_INVALID == qos_mark_configs[output_source][sw_if_index]) { qos_egress_map_feature_config (sw_if_index, output_source, 1); } qos_mark_configs[output_source][sw_if_index] = qemi; return (0); } int qos_mark_disable (u32 sw_if_index, qos_source_t output_source) { if (vec_len (qos_mark_configs[output_source]) < sw_if_index) return VNET_API_ERROR_NO_MATCHING_INTERFACE; if (INDEX_INVALID == qos_mark_configs[output_source][sw_if_index]) return VNET_API_ERROR_VALUE_EXIST; if (INDEX_INVALID != qos_mark_configs[output_source][sw_if_index]) { qos_egress_map_feature_config (sw_if_index, output_source, 0); } qos_mark_configs[output_source][sw_if_index] = INDEX_INVALID; return (0); } static clib_error_t * qos_mark_cli (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { qos_egress_map_id_t map_id; u32 sw_if_index, qs; vnet_main_t *vnm; int rv, enable; vnm = vnet_get_main (); map_id = ~0; qs = 0xff; enable = 1; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "id %d", &map_id)) ; else if (unformat (input, "disable")) enable = 0; else if (unformat (input, "%U", unformat_qos_source, &qs)) ; else if (unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index)) ; else break; } if (~0 == sw_if_index) return clib_error_return (0, "interface must be specified"); if (0xff == qs) return clib_error_return (0, "output location must be specified"); if (enable) rv = qos_mark_enable (sw_if_index, qs, map_id); else rv = qos_mark_disable (sw_if_index, qs); if (0 == rv) return (NULL); return clib_error_return (0, "Failed to map interface"); } /*? * Apply a QoS egress mapping table to an interface for QoS marking packets * at the given output protocol. * * @cliexpar * @cliexcmd{qos egress interface GigEthernet0/9/0 id 0 output ip} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (qos_egress_map_interface_command, static) = { .path = "qos mark", .short_help = "qos mark <SOURCE> <INTERFACE> id <MAP>", .function = qos_mark_cli, .is_mp_safe = 1, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: * */