diff options
Diffstat (limited to 'vnet')
| -rw-r--r-- | vnet/Makefile.am | 11 | ||||
| -rw-r--r-- | vnet/vnet/devices/devices.c | 6 | ||||
| -rw-r--r-- | vnet/vnet/feature/feature.c | 5 | ||||
| -rw-r--r-- | vnet/vnet/feature/feature.h | 7 | ||||
| -rw-r--r-- | vnet/vnet/span/node.c | 260 | ||||
| -rw-r--r-- | vnet/vnet/span/span.c | 139 | ||||
| -rw-r--r-- | vnet/vnet/span/span.h | 51 | ||||
| -rw-r--r-- | vnet/vnet/span/span.md | 65 |
8 files changed, 544 insertions, 0 deletions
diff --git a/vnet/Makefile.am b/vnet/Makefile.am index fef928abd35..3ffcca8e59f 100644 --- a/vnet/Makefile.am +++ b/vnet/Makefile.am @@ -632,6 +632,17 @@ nobase_include_HEADERS += \ vnet/lawful-intercept/lawful_intercept.h ######################################## +# SPAN (port mirroring) +######################################## + +libvnet_la_SOURCES += \ + vnet/span/span.c \ + vnet/span/node.c + +nobase_include_HEADERS += \ + vnet/span/span.h + +######################################## # Packet generator ######################################## diff --git a/vnet/vnet/devices/devices.c b/vnet/vnet/devices/devices.c index 928b0b4757a..3eef95b7c90 100644 --- a/vnet/vnet/devices/devices.c +++ b/vnet/vnet/devices/devices.c @@ -52,6 +52,12 @@ VNET_FEATURE_INIT (worker_handoff, static) = { .runs_before = VNET_FEATURES ("ethernet-input"), }; +VNET_FEATURE_INIT (span_input, static) = { + .arc_name = "device-input", + .node_name = "span-input", + .runs_before = VNET_FEATURES ("ethernet-input"), +}; + VNET_FEATURE_INIT (ethernet_input, static) = { .arc_name = "device-input", .node_name = "ethernet-input", diff --git a/vnet/vnet/feature/feature.c b/vnet/vnet/feature/feature.c index 1f46285aa21..c8cde360814 100644 --- a/vnet/vnet/feature/feature.c +++ b/vnet/vnet/feature/feature.c @@ -187,6 +187,11 @@ vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index, vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0); ci = cm->config_index_by_sw_if_index[sw_if_index]; + vec_validate (fm->feature_count_by_sw_if_index[arc_index], sw_if_index); + if (!enable_disable + && fm->feature_count_by_sw_if_index[arc_index][sw_if_index] < 1) + return 0; + ci = (enable_disable ? vnet_config_add_feature : vnet_config_del_feature) diff --git a/vnet/vnet/feature/feature.h b/vnet/vnet/feature/feature.h index b026cdf1c8f..667c5e36b62 100644 --- a/vnet/vnet/feature/feature.h +++ b/vnet/vnet/feature/feature.h @@ -145,6 +145,13 @@ vnet_get_feature_arc_config_main (u8 arc_index) return &fm->feature_config_mains[arc_index]; } +static_always_inline vnet_feature_config_main_t * +vnet_feature_get_config_main (u16 arc) +{ + vnet_feature_main_t *fm = &feature_main; + return &fm->feature_config_mains[arc]; +} + static_always_inline int vnet_have_features (u8 arc, u32 sw_if_index) { diff --git a/vnet/vnet/span/node.c b/vnet/vnet/span/node.c new file mode 100644 index 00000000000..2012283db2b --- /dev/null +++ b/vnet/vnet/span/node.c @@ -0,0 +1,260 @@ +/* + * Copyright (c) 2016 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 <vppinfra/error.h> + +#include <vnet/span/span.h> + +#include <vppinfra/error.h> +#include <vppinfra/elog.h> + +vlib_node_registration_t span_node; + +/* packet trace format function */ +u8 * +format_span_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 *); + span_trace_t *t = va_arg (*args, span_trace_t *); + + vnet_main_t *vnm = &vnet_main; + s = format (s, "SPAN: mirrored %U -> %U", + format_vnet_sw_if_index_name, vnm, t->src_sw_if_index, + format_vnet_sw_if_index_name, vnm, t->mirror_sw_if_index); + + return s; +} + +#define foreach_span_error \ +_(HITS, "SPAN incomming packets processed") + +typedef enum +{ +#define _(sym,str) SPAN_ERROR_##sym, + foreach_span_error +#undef _ + SPAN_N_ERROR, +} span_error_t; + +static char *span_error_strings[] = { +#define _(sym,string) string, + foreach_span_error +#undef _ +}; + +static uword +span_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + span_main_t *sm = &span_main; + vnet_main_t *vnm = &vnet_main; + u32 n_left_from, *from, *to_next, *to_mirror_next = 0; + u32 n_span_packets = 0; + u32 next_index, mirror_sw_if_index0, mirror_sw_if_index1; + u32 last_mirror_sw_if_index = ~0; + vlib_frame_t *mirror_frame = 0; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + /* TODO dual loop */ + 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 >= 4 && n_left_to_next >= 2) + { + u32 bi0; + u32 bi1; + vlib_buffer_t *b0, *c0; + vlib_buffer_t *b1, *c1; + u32 sw_if_index0; + u32 next0 = 0; //SPAN_NEXT_ORIG_ETHERNET; + u32 sw_if_index1; + u32 next1 = 1; //SPAN_NEXT_ORIG_ETHERNET; + + /* speculatively enqueue b0, b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + to_next += 2; + n_left_to_next -= 2; + from += 2; + n_left_from -= 2; + + b0 = vlib_get_buffer (vm, bi0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + mirror_sw_if_index0 = sm->dst_by_src_sw_if_index[sw_if_index0]; + b1 = vlib_get_buffer (vm, bi1); + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + mirror_sw_if_index1 = sm->dst_by_src_sw_if_index[sw_if_index1]; + + /* get frame to mirror interface */ + if (PREDICT_FALSE + ((last_mirror_sw_if_index != mirror_sw_if_index0) + || mirror_frame == 0)) + { + if (mirror_frame) + vnet_put_frame_to_sw_interface (vnm, last_mirror_sw_if_index, + mirror_frame); + last_mirror_sw_if_index = mirror_sw_if_index0; + mirror_frame = + vnet_get_frame_to_sw_interface (vnm, mirror_sw_if_index0); + to_mirror_next = vlib_frame_vector_args (mirror_frame); + } + /* get frame to mirror interface */ + if (PREDICT_FALSE + ((last_mirror_sw_if_index != mirror_sw_if_index1) + || mirror_frame == 0)) + { + if (mirror_frame) + vnet_put_frame_to_sw_interface (vnm, last_mirror_sw_if_index, + mirror_frame); + last_mirror_sw_if_index = mirror_sw_if_index1; + mirror_frame = + vnet_get_frame_to_sw_interface (vnm, mirror_sw_if_index0); + to_mirror_next = vlib_frame_vector_args (mirror_frame); + } + c0 = vlib_buffer_copy (vm, b0); + vnet_buffer (c0)->sw_if_index[VLIB_TX] = mirror_sw_if_index0; + to_mirror_next[0] = vlib_get_buffer_index (vm, c0); + to_mirror_next += 1; + mirror_frame->n_vectors++; + + vnet_feature_next (sw_if_index0, &next0, b0); + + c1 = vlib_buffer_copy (vm, b1); + vnet_buffer (c1)->sw_if_index[VLIB_TX] = mirror_sw_if_index1; + to_mirror_next[0] = vlib_get_buffer_index (vm, c1); + to_mirror_next += 1; + mirror_frame->n_vectors++; + + vnet_feature_next (sw_if_index1, &next1, b1); + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + span_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->src_sw_if_index = sw_if_index0; + t->mirror_sw_if_index = + sm->dst_by_src_sw_if_index[sw_if_index0]; + } + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + span_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); + t->src_sw_if_index = sw_if_index1; + t->mirror_sw_if_index = + sm->dst_by_src_sw_if_index[sw_if_index1]; + } + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0, *c0; + u32 sw_if_index0; + u32 next0 = 0; //SPAN_NEXT_ORIG_ETHERNET; + + /* speculatively enqueue b0 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next += 1; + n_left_to_next -= 1; + from += 1; + n_left_from -= 1; + + b0 = vlib_get_buffer (vm, bi0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + mirror_sw_if_index0 = sm->dst_by_src_sw_if_index[sw_if_index0]; + + /* get frame to mirror interface */ + if (PREDICT_FALSE + ((last_mirror_sw_if_index != mirror_sw_if_index0) + || mirror_frame == 0)) + { + if (mirror_frame) + vnet_put_frame_to_sw_interface (vnm, last_mirror_sw_if_index, + mirror_frame); + last_mirror_sw_if_index = mirror_sw_if_index0; + mirror_frame = + vnet_get_frame_to_sw_interface (vnm, mirror_sw_if_index0); + to_mirror_next = vlib_frame_vector_args (mirror_frame); + } + c0 = vlib_buffer_copy (vm, b0); + vnet_buffer (c0)->sw_if_index[VLIB_TX] = mirror_sw_if_index0; + to_mirror_next[0] = vlib_get_buffer_index (vm, c0); + to_mirror_next += 1; + mirror_frame->n_vectors++; + + vnet_feature_next (sw_if_index0, &next0, b0); + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + span_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->src_sw_if_index = sw_if_index0; + t->mirror_sw_if_index = + sm->dst_by_src_sw_if_index[sw_if_index0]; + } + /* 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); + } + + vnet_put_frame_to_sw_interface (vnm, last_mirror_sw_if_index, mirror_frame); + vlib_node_increment_counter (vm, span_node.index, SPAN_ERROR_HITS, + n_span_packets); + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (span_node) = { + .function = span_node_fn, + .name = "span-input", + .vector_size = sizeof (u32), + .format_trace = format_span_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(span_error_strings), + .error_strings = span_error_strings, + + .n_next_nodes = 0, + + /* edit / add dispositions here */ + .next_nodes = { + [0] = "error-drop", + }, +}; + +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (span_node, span_node_fn) +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/vnet/vnet/span/span.c b/vnet/vnet/span/span.c new file mode 100644 index 00000000000..de43af0bded --- /dev/null +++ b/vnet/vnet/span/span.c @@ -0,0 +1,139 @@ +/* + * Copyright (c) 2016 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 <vppinfra/error.h> +#include <vnet/feature/feature.h> + +#include <vnet/span/span.h> + +int +span_add_delete_entry (vlib_main_t * vm, + u32 src_sw_if_index, u32 dst_sw_if_index, u8 is_add) +{ + span_main_t *sm = &span_main; + + if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && is_add) + || (src_sw_if_index == dst_sw_if_index)) + return VNET_API_ERROR_INVALID_INTERFACE; + + vnet_sw_interface_t *sw = + vnet_get_sw_interface (sm->vnet_main, src_sw_if_index); + + vec_validate_aligned (sm->dst_by_src_sw_if_index, sw->hw_if_index, + CLIB_CACHE_LINE_BYTES); + sm->dst_by_src_sw_if_index[sw->hw_if_index] = is_add ? dst_sw_if_index : 0; + vnet_feature_enable_disable ("device-input", "span-input", + sw->hw_if_index, is_add, 0, 0); + return 0; +} + +static clib_error_t * +set_interface_span_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + span_main_t *sm = &span_main; + u32 src_sw_if_index = ~0; + u32 dst_sw_if_index = ~0; + u8 is_add = 1; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_vnet_sw_interface, + sm->vnet_main, &src_sw_if_index)) + ; + else if (unformat (input, "destination %U", unformat_vnet_sw_interface, + sm->vnet_main, &dst_sw_if_index)) + ; + else if (unformat (input, "disable")) + is_add = 0; + else + break; + } + + int rv = + span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, is_add); + if (rv == VNET_API_ERROR_INVALID_INTERFACE) + return clib_error_return (0, "Invalid interface"); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (set_interface_span_command, static) = { + .path = "set interface span", + .short_help = "set interface span <if-name> [disable | destination <if-name>]", + .function = set_interface_span_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +show_interfaces_span_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + + span_main_t *sm = &span_main; + vnet_main_t *vnm = &vnet_main; + u32 src_sw_if_index = 0, *dst_sw_if_index; + u8 header = 1; + + vec_foreach (dst_sw_if_index, sm->dst_by_src_sw_if_index) + { + if (*dst_sw_if_index > 0) // && *dst_sw_if_index != ~0) + { + if (header) + { + vlib_cli_output (vm, + "SPAN source interface to destination interface table"); + header = 0; + } + vlib_cli_output (vm, "%32U => %-32U", + format_vnet_sw_if_index_name, vnm, src_sw_if_index, + format_vnet_sw_if_index_name, vnm, *dst_sw_if_index); + } + src_sw_if_index++; + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (show_interfaces_span_command, static) = { + .path = "show interfaces span", + .short_help = "Shows SPAN mirror table", + .function = show_interfaces_span_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +span_init (vlib_main_t * vm) +{ + span_main_t *sm = &span_main; + + sm->vlib_main = vm; + sm->vnet_main = vnet_get_main (); + + return 0; +} + +VLIB_INIT_FUNCTION (span_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/vnet/vnet/span/span.h b/vnet/vnet/span/span.h new file mode 100644 index 00000000000..751bebf6680 --- /dev/null +++ b/vnet/vnet/span/span.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2016 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. + */ + +#ifndef __span_h__ +#define __span_h__ + +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> + +typedef struct +{ + /* destination interface index by source interface index */ + u32 *dst_by_src_sw_if_index; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} span_main_t; + +span_main_t span_main; + +typedef struct +{ + u32 src_sw_if_index; /* mirrored interface index */ + u32 mirror_sw_if_index; /* output interface index */ +} span_trace_t; + +#endif /* __span_h__ */ + +int +span_add_delete_entry (vlib_main_t * vm, u32 src_sw_if_index, + u32 dst_sw_if_index, u8 is_add); +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/vnet/vnet/span/span.md b/vnet/vnet/span/span.md new file mode 100644 index 00000000000..ee3f814f5c3 --- /dev/null +++ b/vnet/vnet/span/span.md @@ -0,0 +1,65 @@ +# VPP SPAN implementation + +This is a memo intended to contain documentation of the VPP SPAN implementation. +Everything that is not directly obvious should come here. + + +## Switched Port Analyzer (SPAN) +Port mirroring is used on a network switch to send a copy of network packets seen on one switch port to a network monitoring connection on another switch port. +Can be used by network engineers or administrators to measure performnce, analyze and debug data or diagnose errors on a network. + +### RX traffic node +There is one static node to mirror incomming packets. +* span-input: Creates a copy of incomming buffer due to incomming buffers can be reused internally. + +Chaining: dpdk-input -> span-input -> +* original buffer is sent to ethernet-input for processing +* buffer copy is sent to interface-output + +### Configuration +SPAN supports the following CLI configuration commands: + +#### Enable/Disable SPAN (CLI) + set interface span <if-name> [disable | destination <if-name>] + +<if-name>: mirrored interface name +destination <if-name>: monitoring interface name +disable: delete mirroring + +#### Enable/Disabl SPAN (API) +SPAN supports the following API configuration command: + sw_interface_span_enable_disable src GigabitEthernet0/8/0 dst GigabitEthernet0/9/0 + sw_interface_span_enable_disable src_sw_if_index 1 dst_sw_if_index 2 + +src/src_sw_if_index: mirrored interface name +dst/dst_sw_if_index: monitoring interface name + +#### Remove SPAN entry (API) +SPAN supports the following API configuration command: + sw_interface_span_enable_disable src_sw_if_index 1 dst_sw_if_index 2 disable + +src_sw_if_index: mirrored interface name +dst_sw_if_index: monitoring interface name + +### Configuration example + +Mirror all packets on interface GigabitEthernet0/10/0 to interface GigabitEthernet0/11/0. + +Configure IPv4 addresses on mirrored interface: +set interface ip address GigabitEthernet0/10/0 192.168.1.13/24 +set interface state GigabitEthernet0/10/0 up + +Configure IPv4 addresses on monitoring interface: +set interface ip address GigabitEthernet0/11/0 192.168.2.13/24 +set interface state GigabitEthernet0/11/0 up + +Configure SPAN +set span src GigabitEthernet0/10/0 dst GigabitEthernet0/11/0 + +### Operational data + +Active SPAN mirroring CLI show command: + show interfaces span + +Active SPAN mirroring API dump command: + sw_interface_span_dump |