diff options
Diffstat (limited to 'src/vnet/qos/qos_record.c')
| -rw-r--r-- | src/vnet/qos/qos_record.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/src/vnet/qos/qos_record.c b/src/vnet/qos/qos_record.c new file mode 100644 index 00000000000..047bd25cda4 --- /dev/null +++ b/src/vnet/qos/qos_record.c @@ -0,0 +1,326 @@ +/* + * 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/qos/qos_record.h> +#include <vnet/ip/ip.h> +#include <vnet/ip/ip6_to_ip4.h> +#include <vnet/feature/feature.h> +#include <vnet/qos/qos_types.h> + +/** + * Per-interface, per-protocol vector of feature on/off configurations + */ +static u8 *qos_record_configs[QOS_N_SOURCES]; + +static void +qos_record_feature_config (u32 sw_if_index, + qos_source_t input_source, u8 enable) +{ + switch (input_source) + { + case QOS_SOURCE_IP: + vnet_feature_enable_disable ("ip6-unicast", "ip6-qos-record", + sw_if_index, enable, NULL, 0); + vnet_feature_enable_disable ("ip6-multicast", "ip6-qos-record", + sw_if_index, enable, NULL, 0); + vnet_feature_enable_disable ("ip4-unicast", "ip4-qos-record", + sw_if_index, enable, NULL, 0); + vnet_feature_enable_disable ("ip4-multicast", "ip4-qos-record", + sw_if_index, enable, NULL, 0); + break; + case QOS_SOURCE_MPLS: + case QOS_SOURCE_VLAN: + case QOS_SOURCE_EXT: + // not implemented yet + break; + } +} + +int +qos_record_enable (u32 sw_if_index, qos_source_t input_source) +{ + vec_validate (qos_record_configs[input_source], sw_if_index); + + if (0 == qos_record_configs[input_source][sw_if_index]) + { + qos_record_feature_config (sw_if_index, input_source, 1); + } + + qos_record_configs[input_source][sw_if_index]++; + return (0); +} + +int +qos_record_disable (u32 sw_if_index, qos_source_t input_source) +{ + if (vec_len (qos_record_configs[input_source]) < sw_if_index) + return VNET_API_ERROR_NO_MATCHING_INTERFACE; + + if (0 == qos_record_configs[input_source][sw_if_index]) + return VNET_API_ERROR_VALUE_EXIST; + + qos_record_configs[input_source][sw_if_index]--; + + if (0 == qos_record_configs[input_source][sw_if_index]) + { + qos_record_feature_config (sw_if_index, input_source, 0); + } + + return (0); +} + +/* + * Disable recording feautre for all protocols when the interface + * is deleted + */ +static clib_error_t * +qos_record_ip_interface_add_del (vnet_main_t * vnm, + u32 sw_if_index, u32 is_add) +{ + if (!is_add) + { + qos_source_t qs; + + FOR_EACH_QOS_SOURCE (qs) + { + qos_record_disable (sw_if_index, qs); + } + } + + return (NULL); +} + +VNET_SW_INTERFACE_ADD_DEL_FUNCTION (qos_record_ip_interface_add_del); + +/** + * per-packet trace data + */ +typedef struct qos_record_trace_t_ +{ + /* per-pkt trace data */ + qos_bits_t bits; +} qos_record_trace_t; + +static inline uword +qos_record_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, 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) + { + ip4_header_t *ip4_0; + ip6_header_t *ip6_0; + vlib_buffer_t *b0; + u32 sw_if_index0, next0, bi0; + qos_bits_t qos0; + + 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); + if (is_ip6) + { + ip6_0 = vlib_buffer_get_current (b0); + qos0 = ip6_traffic_class_network_order (ip6_0); + } + else + { + ip4_0 = vlib_buffer_get_current (b0); + qos0 = ip4_0->tos; + } + vnet_buffer2 (b0)->qos.bits = qos0; + vnet_buffer2 (b0)->qos.source = QOS_SOURCE_IP; + b0->flags |= VNET_BUFFER_F_QOS_DATA_VALID; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + + vnet_feature_next (sw_if_index0, &next0, b0); + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && + (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + qos_record_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->bits = qos0; + } + + /* 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_record_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_record_trace_t *t = va_arg (*args, qos_record_trace_t *); + + s = format (s, "qos:%d", t->bits); + + return s; +} + +static inline uword +ip4_qos_record (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (qos_record_inline (vm, node, frame, 0)); +} + +static inline uword +ip6_qos_record (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (qos_record_inline (vm, node, frame, 1)); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip4_qos_record_node) = { + .function = ip4_qos_record, + .name = "ip4-qos-record", + .vector_size = sizeof (u32), + .format_trace = format_qos_record_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 1, + + .next_nodes = { + [0] = "ip4-drop", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip4_qos_record_node, ip4_qos_record); + +VNET_FEATURE_INIT (ip4_qos_record_node, static) = { + .arc_name = "ip4-unicast", + .node_name = "ip4-qos-record", +}; + +VLIB_REGISTER_NODE (ip6_qos_record_node) = { + .function = ip6_qos_record, + .name = "ip6-qos-record", + .vector_size = sizeof (u32), + .format_trace = format_qos_record_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 1, + + .next_nodes = { + [0] = "ip6-drop", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_qos_record_node, ip6_qos_record); + +VNET_FEATURE_INIT (ip6_qos_record_node, static) = { + .arc_name = "ip6-unicast", + .node_name = "ip6-qos-record", +}; +/* *INDENT-ON* */ + + +static clib_error_t * +qos_record_cli (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + vnet_main_t *vnm = vnet_get_main (); + u32 sw_if_index, qs; + u8 enable; + + qs = 0xff; + enable = 1; + sw_if_index = ~0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_vnet_sw_interface, + vnm, &sw_if_index)) + ; + else if (unformat (input, "%U", unformat_qos_source, &qs)) + ; + else if (unformat (input, "enable")) + enable = 1; + else if (unformat (input, "disable")) + enable = 0; + else + break; + } + + if (~0 == sw_if_index) + return clib_error_return (0, "interface must be specified"); + if (0xff == qs) + return clib_error_return (0, "input location must be specified"); + + if (enable) + qos_record_enable (sw_if_index, qs); + else + qos_record_disable (sw_if_index, qs); + + return (NULL); +} + +/*? + * Enable QoS bit recording on an interface using the packet's input DSCP bits + * Which input QoS bits to use are either; IP, MPLS or VLAN. If more than + * one protocol is chosen (which is foolish) the higer layers override the + * lower. + * + * @cliexpar + * @cliexcmd{qos record ip GigEthernet0/1/0} + ?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (qos_record_command, static) = { + .path = "qos record", + .short_help = "qos record <record-source> <INTERFACE> [disable]", + .function = qos_record_cli, + .is_mp_safe = 1, +}; +/* *INDENT-ON* */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |