deprecate VLIB_NODE_FUNCTION_MULTIARCH - vpp

diff options

author	Filip Tehlar <ftehlar@cisco.com>	2019-03-11 05:53:35 -0700
committer	Damjan Marion <dmarion@me.com>	2019-03-13 10:59:48 +0000
commit	c3a0e8d2d255c0925d1ec17aba8c8892d532b040 (patch)
tree	831a90adb1789a06e44cdd15a9c35f2c5c02d438 /src/vlib/unix/main.c
parent	47a9c651e21731ec4d20e123f6c591d7078f3992 (diff)

deprecate VLIB_NODE_FUNCTION_MULTIARCH

Change-Id: I403173846bc5b1bbbe2a2c41225b0f666f851cb9 Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

Diffstat (limited to 'src/vlib/unix/main.c')

0 files changed, 0 insertions, 0 deletions

/* * 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. */ /* * trace.c: VLIB trace buffer. * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <vlib/vlib.h> #include <vlib/threads.h> u8 *vnet_trace_placeholder; /* Helper function for nodes which only trace buffer data. */ void vlib_trace_frame_buffers_only (vlib_main_t * vm, vlib_node_runtime_t * node, u32 * buffers, uword n_buffers, uword next_buffer_stride, uword n_buffer_data_bytes_in_trace) { u32 n_left, *from; n_left = n_buffers; from = buffers; while (n_left >= 4) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u8 *t0, *t1; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, from[2], LOAD); vlib_prefetch_buffer_with_index (vm, from[3], LOAD); bi0 = from[0]; bi1 = from[1]; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, n_buffer_data_bytes_in_trace); clib_memcpy_fast (t0, b0->data + b0->current_data, n_buffer_data_bytes_in_trace); } if (b1->flags & VLIB_BUFFER_IS_TRACED) { t1 = vlib_add_trace (vm, node, b1, n_buffer_data_bytes_in_trace); clib_memcpy_fast (t1, b1->data + b1->current_data, n_buffer_data_bytes_in_trace); } from += 2; n_left -= 2; } while (n_left >= 1) { u32 bi0; vlib_buffer_t *b0; u8 *t0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, n_buffer_data_bytes_in_trace); clib_memcpy_fast (t0, b0->data + b0->current_data, n_buffer_data_bytes_in_trace); } from += 1; n_left -= 1; } } /* Free up all trace buffer memory. */ always_inline void clear_trace_buffer (void) { int i; vlib_trace_main_t *tm; /* *INDENT-OFF* */ foreach_vlib_main ( ({ tm = &this_vlib_main->trace_main; tm->trace_enable = 0; vec_free (tm->nodes); })); foreach_vlib_main ( ({ tm = &this_vlib_main->trace_main; for (i = 0; i < vec_len (tm->trace_buffer_pool); i++) if (! pool_is_free_index (tm->trace_buffer_pool, i)) vec_free (tm->trace_buffer_pool[i]); pool_free (tm->trace_buffer_pool); })); /* *INDENT-ON* */ } u8 * format_vlib_trace (u8 * s, va_list * va) { vlib_main_t *vm = va_arg (*va, vlib_main_t *); vlib_trace_header_t *h = va_arg (*va, vlib_trace_header_t *); vlib_trace_header_t *e = vec_end (h); vlib_node_t *node, *prev_node; clib_time_t *ct = &vm->clib_time; f64 t; prev_node = 0; while (h < e) { node = vlib_get_node (vm, h->node_index); if (node != prev_node) { t = (h->time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock; s = format (s, "\n%U: %v", format_time_interval, "h:m:s:u", t, node->name); } prev_node = node; if (node->format_trace) s = format (s, "\n %U", node->format_trace, vm, node, h->data); else s = format (s, "\n %U", node->format_buffer, h->data); h = vlib_trace_header_next (h); } return s; } /* Root of all trace cli commands. */ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (trace_cli_command,static) = { .path = "trace", .short_help = "Packet tracer commands", }; /* *INDENT-ON* */ int trace_time_cmp (void *a1, void *a2) { vlib_trace_header_t **t1 = a1; vlib_trace_header_t **t2 = a2; i64 dt = t1[0]->time - t2[0]->time; return dt < 0 ? -1 : (dt > 0 ? +1 : 0); } /* * Return 1 if this packet passes the trace filter, or 0 otherwise */ u32 filter_accept (vlib_trace_main_t * tm, vlib_trace_header_t * h) { vlib_trace_header_t *e = vec_end (h); if (tm->filter_flag == 0) return 1; /* * When capturing a post-mortem dispatch trace, * toss all existing traces once per dispatch cycle. * So we can trace 4 billion pkts without running out of * memory... */ if (tm->filter_flag == FILTER_FLAG_POST_MORTEM) return 0; if (tm->filter_flag == FILTER_FLAG_INCLUDE) { while (h < e) { if (h->node_index == tm->filter_node_index) return 1; h = vlib_trace_header_next (h); } return 0; } else /* FILTER_FLAG_EXCLUDE */ { while (h < e) { if (h->node_index == tm->filter_node_index) return 0; h = vlib_trace_header_next (h); } return 1; } return 0; } /* * Remove traces from the trace buffer pool that don't pass the filter */ void trace_apply_filter (vlib_main_t * vm) { vlib_trace_main_t *tm = &vm->trace_main; vlib_trace_header_t **h; vlib_trace_header_t ***traces_to_remove = 0; u32 index; u32 trace_index; u32 n_accepted; u32 accept; if (tm->filter_flag == FILTER_FLAG_NONE) return; /* * Ideally we would retain the first N traces that pass the filter instead * of any N traces. */ n_accepted = 0; /* *INDENT-OFF* */ pool_foreach (h, tm->trace_buffer_pool, ({ accept = filter_accept(tm, h[0]); if ((n_accepted == tm->filter_count) || !accept) vec_add1 (traces_to_remove, h); else n_accepted++; })); /* *INDENT-ON* */ /* remove all traces that we don't want to keep */ for (index = 0; index < vec_len (traces_to_remove); index++) { trace_index = traces_to_remove[index] - tm->trace_buffer_pool; _vec_len (tm->trace_buffer_pool[trace_index]) = 0; pool_put_index (tm->trace_buffer_pool, trace_index); } vec_free (traces_to_remove); } static clib_error_t * cli_show_trace_buffer (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vlib_trace_main_t *tm; vlib_trace_header_t **h, **traces; u32 i, index = 0; char *fmt; u8 *s = 0; u32 max; /* * By default display only this many traces. To display more, explicitly * specify a max. This prevents unexpectedly huge outputs. */ max = 50; while (unformat_check_input (input) != (uword) UNFORMAT_END_OF_INPUT) { if (unformat (input, "max %d", &max)) ; else return clib_error_create ("expected 'max COUNT', got `%U'", format_unformat_error, input); } /* Get active traces from pool. */ /* *INDENT-OFF* */ foreach_vlib_main ( ({ fmt = "------------------- Start of thread %d %s -------------------\n"; s = format (s, fmt, index, vlib_worker_threads[index].name); tm = &this_vlib_main->trace_main; trace_apply_filter(this_vlib_main); traces = 0; pool_foreach (h, tm->trace_buffer_pool, ({ vec_add1 (traces, h[0]); })); if (vec_len (traces) == 0) { s = format (s, "No packets in trace buffer\n"); goto done; } /* Sort them by increasing time. */ vec_sort_with_function (traces, trace_time_cmp); for (i = 0; i < vec_len (traces); i++) { if (i == max) { vlib_cli_output (vm, "Limiting display to %d packets." " To display more specify max.", max); goto done; } s = format (s, "Packet %d\n%U\n\n", i + 1, format_vlib_trace, vm, traces[i]); } done: vec_free (traces); index++; })); /* *INDENT-ON* */ vlib_cli_output (vm, "%v", s); vec_free (s); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_trace_cli,static) = { .path = "show trace", .short_help = "Show trace buffer [max COUNT]", .function = cli_show_trace_buffer, }; /* *INDENT-ON* */ int vlib_enable_disable_pkt_trace_filter (int enable) __attribute__ ((weak)); int vlib_enable_disable_pkt_trace_filter (int enable) { return 0; } void vlib_trace_stop_and_clear (void) { vlib_enable_disable_pkt_trace_filter (0); /* disble tracing */ clear_trace_buffer (); } void trace_update_capture_options (u32 add, u32 node_index, u32 filter, u8 verbose) { vlib_trace_main_t *tm; vlib_trace_node_t *tn; if (add == ~0) add = 50; /* *INDENT-OFF* */ foreach_vlib_main (( { tm = &this_vlib_main->trace_main; tm->verbose = verbose; vec_validate (tm->nodes, node_index); tn = tm->nodes + node_index; /* * Adding 0 makes no real sense, and there wa no other way * to explicilty zero-out the limits and count, so make * an "add 0" request really be "set to 0". */ if (add == 0) tn->limit = tn->count = 0; else tn->limit += add; })); foreach_vlib_main (( { tm = &this_vlib_main->trace_main; tm->trace_enable = 1; })); /* *INDENT-ON* */ } static clib_error_t * cli_add_trace_buffer (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; vlib_node_t *node; u32 node_index, add; u8 verbose = 0; int filter = 0; clib_error_t *error = 0; if (!unformat_user (input, unformat_line_input, line_input)) return 0; if (vnet_trace_placeholder == 0) vec_validate_aligned (vnet_trace_placeholder, 2048, CLIB_CACHE_LINE_BYTES); while (unformat_check_input (line_input) != (uword) UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "%U %d", unformat_vlib_node, vm, &node_index, &add)) ; else if (unformat (line_input, "verbose")) verbose = 1; else if (unformat (line_input, "filter")) filter = 1; else { error = clib_error_create ("expected NODE COUNT, got `%U'", format_unformat_error, line_input); goto done; } } node = vlib_get_node (vm, node_index); if ((node->flags & VLIB_NODE_FLAG_TRACE_SUPPORTED) == 0) { error = clib_error_create ("node '%U' doesn't support per-node " "tracing. There may be another way to " "initiate trace on this node.", format_vlib_node_name, vm, node_index); goto done; } if (filter) { if (vlib_enable_disable_pkt_trace_filter (1 /* enable */ )) { error = clib_error_create ("No packet trace filter configured..."); goto done; } } trace_update_capture_options (add, node_index, filter, verbose); done: unformat_free (line_input); return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (add_trace_cli,static) = { .path = "trace add", .short_help = "trace add <input-graph-node> <add'l-pkts-for-node-> [filter] [verbose]", .function = cli_add_trace_buffer, }; /* *INDENT-ON* */ /* * Configure a filter for packet traces. * * This supplements the packet trace feature so that only packets matching * the filter are included in the trace. Currently the only filter is to * keep packets that include a certain node in the trace or exclude a certain * node in the trace. * * The count of traced packets in the "trace add" command is still used to * create a certain number of traces. The "trace filter" command specifies * how many of those packets should be retained in the trace. * * For example, 1Mpps of traffic is arriving and one of those packets is being * dropped. To capture the trace for only that dropped packet, you can do: * trace filter include error-drop 1 * trace add dpdk-input 1000000 * <wait one second> * show trace * * Note that the filter could be implemented by capturing all traces and just * reducing traces displayed by the "show trace" function. But that would * require a lot of memory for storing the traces, making that infeasible. * * To remove traces from the trace pool that do not include a certain node * requires that the trace be "complete" before applying the filter. To * accomplish this, the trace pool is filtered upon each iteraction of the * main vlib loop. Doing so keeps the number of allocated traces down to a * reasonably low number. This requires that tracing for a buffer is not * performed after the vlib main loop interation completes. i.e. you can't * save away a buffer temporarily then inject it back into the graph and * expect that the trace_index is still valid (such as a traffic manager might * do). A new trace buffer should be allocated for those types of packets. * * The filter can be extended to support multiple nodes and other match * criteria (e.g. input sw_if_index, mac address) but for now just checks if * a specified node is in the trace or not in the trace. */ void trace_filter_set (u32 node_index, u32 flag, u32 count) { /* *INDENT-OFF* */ foreach_vlib_main ( ({ vlib_trace_main_t *tm; tm = &this_vlib_main->trace_main; tm->filter_node_index = node_index; tm->filter_flag = flag; tm->filter_count = count; /* * Clear the trace limits to stop any in-progress tracing * Prevents runaway trace allocations when the filter changes * (or is removed) */ vec_free (tm->nodes); })); /* *INDENT-ON* */ } static clib_error_t * cli_filter_trace (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { u32 filter_node_index; u32 filter_flag; u32 filter_count; if (unformat (input, "include %U %d", unformat_vlib_node, vm, &filter_node_index, &filter_count)) { filter_flag = FILTER_FLAG_INCLUDE; } else if (unformat (input, "exclude %U %d", unformat_vlib_node, vm, &filter_node_index, &filter_count)) { filter_flag = FILTER_FLAG_EXCLUDE; } else if (unformat (input, "none")) { filter_flag = FILTER_FLAG_NONE; filter_node_index = 0; filter_count = 0; } else return clib_error_create ("expected 'include NODE COUNT' or 'exclude NODE COUNT' or 'none', got `%U'", format_unformat_error, input); trace_filter_set (filter_node_index, filter_flag, filter_count); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (filter_trace_cli,static) = { .path = "trace filter", .short_help = "trace filter none | [include|exclude] NODE COUNT", .function = cli_filter_trace, }; /* *INDENT-ON* */ static clib_error_t * cli_clear_trace_buffer (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vlib_trace_stop_and_clear (); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (clear_trace_cli,static) = { .path = "clear trace", .short_help = "Clear trace buffer and free memory", .function = cli_clear_trace_buffer, }; /* *INDENT-ON* */ /* Placeholder function to get us linked in. */ void vlib_trace_cli_reference (void) { } int vnet_is_packet_traced (vlib_buffer_t * b, u32 classify_table_index, int func) __attribute__ ((weak)); int vnet_is_packet_traced (vlib_buffer_t * b, u32 classify_table_index, int func) { clib_warning ("BUG: STUB called"); return 1; } void * vlib_add_trace (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_buffer_t * b, u32 n_data_bytes) { return vlib_add_trace_inline (vm, r, b, n_data_bytes); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


context:
space:
mode: