diff options
Diffstat (limited to 'src/vlib/main.c')
| -rw-r--r-- | src/vlib/main.c | 550 |
1 files changed, 42 insertions, 508 deletions
diff --git a/src/vlib/main.c b/src/vlib/main.c index 761d4ee0bc5..111941ce90a 100644 --- a/src/vlib/main.c +++ b/src/vlib/main.c @@ -742,41 +742,9 @@ void vlib_post_mortem_dump (void) { vlib_main_t *vm = &vlib_global_main; - elog_main_t *em = &vm->elog_main; - - u8 *filename; - clib_error_t *error; - - if ((vm->elog_post_mortem_dump + vm->dispatch_pcap_postmortem) == 0) - return; - - if (vm->dispatch_pcap_postmortem) - { - clib_error_t *error; - pcap_main_t *pm = &vm->dispatch_pcap_main; - - pm->n_packets_to_capture = pm->n_packets_captured; - pm->file_name = (char *) format (0, "/tmp/dispatch_post_mortem.%d%c", - getpid (), 0); - error = pcap_write (pm); - pcap_close (pm); - if (error) - clib_error_report (error); - /* - * We're in the middle of crashing. Don't try to free the filename. - */ - } - if (vm->elog_post_mortem_dump) - { - filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0); - error = elog_write_file (em, (char *) filename, 1 /* flush ring */ ); - if (error) - clib_error_report (error); - /* - * We're in the middle of crashing. Don't try to free the filename. - */ - } + for (int i = 0; i < vec_len (vm->post_mortem_callbacks); i++) + (vm->post_mortem_callbacks[i]) (); } /* *INDENT-OFF* */ @@ -986,163 +954,6 @@ add_trajectory_trace (vlib_buffer_t * b, u32 node_index) #endif } -u8 *format_vnet_buffer_flags (u8 * s, va_list * args) __attribute__ ((weak)); -u8 * -format_vnet_buffer_flags (u8 * s, va_list * args) -{ - s = format (s, "BUG STUB %s", __FUNCTION__); - return s; -} - -u8 *format_vnet_buffer_opaque (u8 * s, va_list * args) __attribute__ ((weak)); -u8 * -format_vnet_buffer_opaque (u8 * s, va_list * args) -{ - s = format (s, "BUG STUB %s", __FUNCTION__); - return s; -} - -u8 *format_vnet_buffer_opaque2 (u8 * s, va_list * args) - __attribute__ ((weak)); -u8 * -format_vnet_buffer_opaque2 (u8 * s, va_list * args) -{ - s = format (s, "BUG STUB %s", __FUNCTION__); - return s; -} - -static u8 * -format_buffer_metadata (u8 * s, va_list * args) -{ - vlib_buffer_t *b = va_arg (*args, vlib_buffer_t *); - - s = format (s, "flags: %U\n", format_vnet_buffer_flags, b); - s = format (s, "current_data: %d, current_length: %d\n", - (i32) (b->current_data), (i32) (b->current_length)); - s = format - (s, - "current_config_index/punt_reason: %d, flow_id: %x, next_buffer: %x\n", - b->current_config_index, b->flow_id, b->next_buffer); - s = - format (s, "error: %d, ref_count: %d, buffer_pool_index: %d\n", - (u32) (b->error), (u32) (b->ref_count), - (u32) (b->buffer_pool_index)); - s = - format (s, "trace_handle: 0x%x, len_not_first_buf: %d\n", b->trace_handle, - b->total_length_not_including_first_buffer); - return s; -} - -#define A(x) vec_add1(vm->pcap_buffer, (x)) - -static void -dispatch_pcap_trace (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - int i; - vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **bufp, *b; - pcap_main_t *pm = &vlib_global_main.dispatch_pcap_main; - vlib_trace_main_t *tm = &vm->trace_main; - u32 capture_size; - vlib_node_t *n; - i32 n_left; - f64 time_now = vlib_time_now (vm); - u32 *from; - u8 *d; - u8 string_count; - - /* Input nodes don't have frames yet */ - if (frame == 0 || frame->n_vectors == 0) - return; - - from = vlib_frame_vector_args (frame); - vlib_get_buffers (vm, from, bufs, frame->n_vectors); - bufp = bufs; - - n = vlib_get_node (vm, node->node_index); - - for (i = 0; i < frame->n_vectors; i++) - { - if (PREDICT_TRUE (pm->n_packets_captured < pm->n_packets_to_capture)) - { - b = bufp[i]; - - vec_reset_length (vm->pcap_buffer); - string_count = 0; - - /* Version, flags */ - A ((u8) VLIB_PCAP_MAJOR_VERSION); - A ((u8) VLIB_PCAP_MINOR_VERSION); - A (0 /* string_count */ ); - A (n->protocol_hint); - - /* Buffer index (big endian) */ - A ((from[i] >> 24) & 0xff); - A ((from[i] >> 16) & 0xff); - A ((from[i] >> 8) & 0xff); - A ((from[i] >> 0) & 0xff); - - /* Node name, NULL-terminated ASCII */ - vm->pcap_buffer = format (vm->pcap_buffer, "%v%c", n->name, 0); - string_count++; - - vm->pcap_buffer = format (vm->pcap_buffer, "%U%c", - format_buffer_metadata, b, 0); - string_count++; - vm->pcap_buffer = format (vm->pcap_buffer, "%U%c", - format_vnet_buffer_opaque, b, 0); - string_count++; - vm->pcap_buffer = format (vm->pcap_buffer, "%U%c", - format_vnet_buffer_opaque2, b, 0); - string_count++; - - /* Is this packet traced? */ - if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) - { - vlib_trace_header_t **h - = pool_elt_at_index (tm->trace_buffer_pool, - vlib_buffer_get_trace_index (b)); - - vm->pcap_buffer = format (vm->pcap_buffer, "%U%c", - format_vlib_trace, vm, h[0], 0); - string_count++; - } - - /* Save the string count */ - vm->pcap_buffer[2] = string_count; - - /* Figure out how many bytes in the pcap trace */ - capture_size = vec_len (vm->pcap_buffer) + - +vlib_buffer_length_in_chain (vm, b); - - clib_spinlock_lock_if_init (&pm->lock); - n_left = clib_min (capture_size, 16384); - d = pcap_add_packet (pm, time_now, n_left, capture_size); - - /* Copy the header */ - clib_memcpy_fast (d, vm->pcap_buffer, vec_len (vm->pcap_buffer)); - d += vec_len (vm->pcap_buffer); - - n_left = clib_min - (vlib_buffer_length_in_chain (vm, b), - (16384 - vec_len (vm->pcap_buffer))); - /* Copy the packet data */ - while (1) - { - u32 copy_length = clib_min ((u32) n_left, b->current_length); - clib_memcpy_fast (d, b->data + b->current_data, copy_length); - n_left -= b->current_length; - if (n_left <= 0) - break; - d += b->current_length; - ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT); - b = vlib_get_buffer (vm, b->next_buffer); - } - clib_spinlock_unlock_if_init (&pm->lock); - } - } -} - static_always_inline u64 dispatch_node (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -1211,9 +1022,6 @@ dispatch_node (vlib_main_t * vm, vlib_buffer_t *b = vlib_get_buffer (vm, from[i]); add_trajectory_trace (b, node->node_index); } - if (PREDICT_FALSE (vm->dispatch_pcap_enable)) - dispatch_pcap_trace (vm, node, frame); - if (PREDICT_TRUE (vm->dispatch_wrapper_fn == 0)) n = node->function (vm, node, frame); else @@ -1221,9 +1029,6 @@ dispatch_node (vlib_main_t * vm, } else { - if (PREDICT_FALSE (vm->dispatch_pcap_enable)) - dispatch_pcap_trace (vm, node, frame); - if (PREDICT_TRUE (vm->dispatch_wrapper_fn == 0)) n = node->function (vm, node, frame); else @@ -1713,19 +1518,6 @@ vl_api_send_pending_rpc_requests (vlib_main_t * vm) { } -static inline void -pcap_postmortem_reset (vlib_main_t * vm) -{ - pcap_main_t *pm = &vm->dispatch_pcap_main; - - /* Reset the trace buffer and capture count */ - clib_spinlock_lock_if_init (&pm->lock); - vec_reset_length (pm->pcap_data); - pm->n_packets_captured = 0; - clib_spinlock_unlock_if_init (&pm->lock); -} - - static_always_inline void vlib_main_or_worker_loop (vlib_main_t * vm, int is_main) { @@ -1821,17 +1613,6 @@ vlib_main_or_worker_loop (vlib_main_t * vm, int is_main) clib_call_callbacks (vm->worker_thread_main_loop_callbacks, vm, cpu_time_now); - /* - * When trying to understand aggravating, hard-to-reproduce - * bugs: reset / restart the pcap dispatch trace once per - * main thread dispatch cycle. All threads share the same - * (spinlock-protected) dispatch trace buffer. It might take - * a few tries to capture a good post-mortem trace of - * a multi-thread issue. Best we can do without a big refactor job. - */ - if (is_main && PREDICT_FALSE (vm->dispatch_pcap_postmortem != 0)) - pcap_postmortem_reset (vm); - /* Process pre-input nodes. */ cpu_time_now = clib_cpu_time_now (); vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]) @@ -2013,6 +1794,44 @@ vlib_worker_loop (vlib_main_t * vm) vlib_main_t vlib_global_main; +void +vlib_add_del_post_mortem_callback (void *cb, int is_add) +{ + vlib_main_t *vm = &vlib_global_main; + int i; + + if (is_add == 0) + { + for (i = vec_len (vm->post_mortem_callbacks) - 1; i >= 0; i--) + if (vm->post_mortem_callbacks[i] == cb) + vec_del1 (vm->post_mortem_callbacks, i); + return; + } + + for (i = 0; i < vec_len (vm->post_mortem_callbacks); i++) + if (vm->post_mortem_callbacks[i] == cb) + return; + vec_add1 (vm->post_mortem_callbacks, cb); +} + +static void +elog_post_mortem_dump (void) +{ + vlib_main_t *vm = &vlib_global_main; + elog_main_t *em = &vm->elog_main; + + u8 *filename; + clib_error_t *error; + + filename = format (0, "/tmp/elog_post_mortem.%d%c", getpid (), 0); + error = elog_write_file (em, (char *) filename, 1 /* flush ring */); + if (error) + clib_error_report (error); + /* + * We're in the middle of crashing. Don't try to free the filename. + */ +} + static clib_error_t * vlib_main_configure (vlib_main_t * vm, unformat_input_t * input) { @@ -2028,7 +1847,8 @@ vlib_main_configure (vlib_main_t * vm, unformat_input_t * input) vm->configured_elog_ring_size = 1 << max_log2 (vm->configured_elog_ring_size); else if (unformat (input, "elog-post-mortem-dump")) - vm->elog_post_mortem_dump = 1; + vlib_add_del_post_mortem_callback (elog_post_mortem_dump, + /* is_add */ 1); else if (unformat (input, "buffer-alloc-success-rate %f", &vm->buffer_alloc_success_rate)) { @@ -2267,292 +2087,6 @@ done: return 0; } -int -vlib_pcap_dispatch_trace_configure (vlib_pcap_dispatch_trace_args_t * a) -{ - vlib_main_t *vm = vlib_get_main (); - pcap_main_t *pm = &vm->dispatch_pcap_main; - vlib_trace_main_t *tm; - vlib_trace_node_t *tn; - - if (a->status) - { - if (vm->dispatch_pcap_enable) - { - int i; - vlib_cli_output - (vm, "pcap dispatch capture enabled: %d of %d pkts...", - pm->n_packets_captured, pm->n_packets_to_capture); - vlib_cli_output (vm, "capture to file %s", pm->file_name); - - for (i = 0; i < vec_len (vm->dispatch_buffer_trace_nodes); i++) - { - vlib_cli_output (vm, - "Buffer trace of %d pkts from %U enabled...", - a->buffer_traces_to_capture, - format_vlib_node_name, vm, - vm->dispatch_buffer_trace_nodes[i]); - } - } - else - vlib_cli_output (vm, "pcap dispatch capture disabled"); - return 0; - } - - /* Consistency checks */ - - /* Enable w/ capture already enabled not allowed */ - if (vm->dispatch_pcap_enable && a->enable) - return -7; /* VNET_API_ERROR_INVALID_VALUE */ - - /* Disable capture with capture already disabled, not interesting */ - if (vm->dispatch_pcap_enable == 0 && a->enable == 0) - return -81; /* VNET_API_ERROR_VALUE_EXIST */ - - /* Change number of packets to capture while capturing */ - if (vm->dispatch_pcap_enable && a->enable - && (pm->n_packets_to_capture != a->packets_to_capture)) - return -8; /* VNET_API_ERROR_INVALID_VALUE_2 */ - - /* Independent of enable/disable, to allow buffer trace multi nodes */ - if (a->buffer_trace_node_index != ~0) - { - /* *INDENT-OFF* */ - foreach_vlib_main (( - { - tm = &this_vlib_main->trace_main; - tm->verbose = 0; /* not sure this ever did anything... */ - vec_validate (tm->nodes, a->buffer_trace_node_index); - tn = tm->nodes + a->buffer_trace_node_index; - tn->limit += a->buffer_traces_to_capture; - if (a->post_mortem) - { - tm->filter_flag = FILTER_FLAG_POST_MORTEM; - tm->filter_count = ~0; - } - tm->trace_enable = 1; - })); - /* *INDENT-ON* */ - vec_add1 (vm->dispatch_buffer_trace_nodes, a->buffer_trace_node_index); - } - - if (a->enable) - { - /* Clean up from previous run, if any */ - vec_free (pm->file_name); - vec_free (pm->pcap_data); - memset (pm, 0, sizeof (*pm)); - - vec_validate_aligned (vnet_trace_placeholder, 2048, - CLIB_CACHE_LINE_BYTES); - if (pm->lock == 0) - clib_spinlock_init (&(pm->lock)); - - if (a->filename == 0) - a->filename = format (0, "/tmp/dispatch.pcap%c", 0); - - pm->file_name = (char *) a->filename; - pm->n_packets_captured = 0; - pm->packet_type = PCAP_PACKET_TYPE_vpp; - pm->n_packets_to_capture = a->packets_to_capture; - vm->dispatch_pcap_postmortem = a->post_mortem; - /* *INDENT-OFF* */ - foreach_vlib_main (({ this_vlib_main->dispatch_pcap_enable = 1;})); - /* *INDENT-ON* */ - } - else - { - /* *INDENT-OFF* */ - foreach_vlib_main (( - { - this_vlib_main->dispatch_pcap_enable = 0; - this_vlib_main->dispatch_pcap_postmortem = 0; - tm = &this_vlib_main->trace_main; - tm->filter_flag = 0; - tm->filter_count = 0; - tm->trace_enable = 0; - })); - /* *INDENT-ON* */ - vec_reset_length (vm->dispatch_buffer_trace_nodes); - if (pm->n_packets_captured) - { - clib_error_t *error; - pm->n_packets_to_capture = pm->n_packets_captured; - vlib_cli_output (vm, "Write %d packets to %s, and stop capture...", - pm->n_packets_captured, pm->file_name); - error = pcap_write (pm); - if (pm->flags & PCAP_MAIN_INIT_DONE) - pcap_close (pm); - /* Report I/O errors... */ - if (error) - { - clib_error_report (error); - return -11; /* VNET_API_ERROR_SYSCALL_ERROR_1 */ - } - return 0; - } - else - return -6; /* VNET_API_ERROR_NO_SUCH_ENTRY */ - } - - return 0; -} - -static clib_error_t * -dispatch_trace_command_fn (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - unformat_input_t _line_input, *line_input = &_line_input; - vlib_pcap_dispatch_trace_args_t _a, *a = &_a; - u8 *filename = 0; - u32 max = 1000; - int rv; - int enable = 0; - int status = 0; - int post_mortem = 0; - u32 node_index = ~0, buffer_traces_to_capture = 100; - - /* Get a line of input. */ - if (!unformat_user (input, unformat_line_input, line_input)) - return 0; - - while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (line_input, "on %=", &enable, 1)) - ; - else if (unformat (line_input, "enable %=", &enable, 1)) - ; - else if (unformat (line_input, "off %=", &enable, 0)) - ; - else if (unformat (line_input, "disable %=", &enable, 0)) - ; - else if (unformat (line_input, "max %d", &max)) - ; - else if (unformat (line_input, "packets-to-capture %d", &max)) - ; - else if (unformat (line_input, "file %U", unformat_vlib_tmpfile, - &filename)) - ; - else if (unformat (line_input, "status %=", &status, 1)) - ; - else if (unformat (line_input, "buffer-trace %U %d", - unformat_vlib_node, vm, &node_index, - &buffer_traces_to_capture)) - ; - else if (unformat (line_input, "post-mortem %=", &post_mortem, 1)) - ; - else - { - return clib_error_return (0, "unknown input `%U'", - format_unformat_error, line_input); - } - } - - unformat_free (line_input); - - /* no need for memset (a, 0, sizeof (*a)), set all fields here. */ - a->filename = filename; - a->enable = enable; - a->status = status; - a->packets_to_capture = max; - a->buffer_trace_node_index = node_index; - a->buffer_traces_to_capture = buffer_traces_to_capture; - a->post_mortem = post_mortem; - - rv = vlib_pcap_dispatch_trace_configure (a); - - switch (rv) - { - case 0: - break; - - case -7: - return clib_error_return (0, "dispatch trace already enabled..."); - - case -81: - return clib_error_return (0, "dispatch trace already disabled..."); - - case -8: - return clib_error_return - (0, "can't change number of records to capture while tracing..."); - - case -11: - return clib_error_return (0, "I/O writing trace capture..."); - - case -6: - return clib_error_return (0, "No packets captured..."); - - default: - vlib_cli_output (vm, "WARNING: trace configure returned %d", rv); - break; - } - return 0; -} - -/*? - * This command is used to start or stop pcap dispatch trace capture, or show - * the capture status. - * - * This command has the following optional parameters: - * - * - <b>on|off</b> - Used to start or stop capture. - * - * - <b>max <nn></b> - Depth of local buffer. Once '<em>nn</em>' number - * of packets have been received, buffer is flushed to file. Once another - * '<em>nn</em>' number of packets have been received, buffer is flushed - * to file, overwriting previous write. If not entered, value defaults - * to 100. Can only be updated if packet capture is off. - * - * - <b>file <name></b> - Used to specify the output filename. The file will - * be placed in the '<em>/tmp</em>' directory, so only the filename is - * supported. Directory should not be entered. If file already exists, file - * will be overwritten. If no filename is provided, '<em>/tmp/vpe.pcap</em>' - * will be used. Can only be updated if packet capture is off. - * - * - <b>status</b> - Displays the current status and configured attributes - * associated with a packet capture. If packet capture is in progress, - * '<em>status</em>' also will return the number of packets currently in - * the local buffer. All additional attributes entered on command line - * with '<em>status</em>' will be ignored and not applied. - * - * @cliexpar - * Example of how to display the status of capture when off: - * @cliexstart{pcap dispatch trace status} - * max is 100, for any interface to file /tmp/vpe.pcap - * pcap dispatch capture is off... - * @cliexend - * Example of how to start a dispatch trace capture: - * @cliexstart{pcap dispatch trace on max 35 file dispatchTrace.pcap} - * pcap dispatch capture on... - * @cliexend - * Example of how to start a dispatch trace capture with buffer tracing - * @cliexstart{pcap dispatch trace on max 10000 file dispatchTrace.pcap buffer-trace dpdk-input 1000} - * pcap dispatch capture on... - * @cliexend - * Example of how to display the status of a tx packet capture in progress: - * @cliexstart{pcap tx trace status} - * max is 35, dispatch trace to file /tmp/vppTest.pcap - * pcap tx capture is on: 20 of 35 pkts... - * @cliexend - * Example of how to stop a tx packet capture: - * @cliexstart{vppctl pcap dispatch trace off} - * captured 21 pkts... - * saved to /tmp/dispatchTrace.pcap... - * Example of how to start a post-mortem dispatch trace: - * pcap dispatch trace on max 20000 buffer-trace - * dpdk-input 3000000000 post-mortem - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (pcap_dispatch_trace_command, static) = { - .path = "pcap dispatch trace", - .short_help = - "pcap dispatch trace [on|off] [max <nn>] [file <name>] [status]\n" - " [buffer-trace <input-node-name> <nn>][post-mortem]", - .function = dispatch_trace_command_fn, -}; -/* *INDENT-ON* */ - vlib_main_t * vlib_get_main_not_inline (void) { |