--- /dev/null
+/*
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <popt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <common/mi-lttng.h>
+#include <lttng/domain-internal.h>
+
+#include "../command.h"
+
+static char *opt_event_list;
+static int opt_kernel;
+static char *opt_channel_name;
+static char *opt_session_name;
+static int opt_userspace;
+static int opt_disable_all;
+static int opt_jul;
+static int opt_log4j;
+static int opt_python;
+static int opt_event_type;
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-disable-event.1.h>
+;
+#endif
+
+enum {
+ OPT_HELP = 1,
+ OPT_TYPE_SYSCALL,
+ OPT_TYPE_TRACEPOINT,
+ OPT_TYPE_PROBE,
+ OPT_TYPE_FUNCTION,
+ OPT_TYPE_ALL,
+ OPT_LIST_OPTIONS,
+};
+
+static struct lttng_handle *handle;
+static struct mi_writer *writer;
+
+static struct poptOption long_options[] = {
+ /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
+ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
+ {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
+ {"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
+ {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
+ {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
+ {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
+ {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
+ {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
+ {"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
+ {"syscall", 0, POPT_ARG_NONE, 0, OPT_TYPE_SYSCALL, 0, 0},
+ {"probe", 0, POPT_ARG_NONE, 0, OPT_TYPE_PROBE, 0, 0},
+ {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TYPE_TRACEPOINT, 0, 0},
+ {"function", 0, POPT_ARG_NONE, 0, OPT_TYPE_FUNCTION, 0, 0},
+ {"all", 0, POPT_ARG_NONE, 0, OPT_TYPE_ALL, 0, 0},
+ {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
+ {0, 0, 0, 0, 0, 0, 0}
+};
+
+static
+const char *print_channel_name(const char *name)
+{
+ return name ? : DEFAULT_CHANNEL_NAME;
+}
+
+static
+const char *print_raw_channel_name(const char *name)
+{
+ return name ? : "<default>";
+}
+
+static
+const char *print_event_type(const enum lttng_event_type ev_type)
+{
+ switch (ev_type) {
+ case LTTNG_EVENT_ALL:
+ return "any";
+ case LTTNG_EVENT_TRACEPOINT:
+ return "tracepoint";
+ case LTTNG_EVENT_PROBE:
+ return "probe";
+ case LTTNG_EVENT_FUNCTION:
+ return "function";
+ case LTTNG_EVENT_FUNCTION_ENTRY:
+ return "function entry";
+ case LTTNG_EVENT_SYSCALL:
+ return "syscall";
+ default:
+ return "";
+ }
+}
+
+/* Mi print a partial event.
+ * enabled is 0 or 1
+ * success is 0 or 1
+ */
+static int mi_print_event(const char *event_name, int enabled, int success)
+{
+ int ret;
+
+ LTTNG_ASSERT(writer);
+ LTTNG_ASSERT(event_name);
+
+ /* Open event element */
+ ret = mi_lttng_writer_open_element(writer, config_element_event);
+ if (ret) {
+ goto end;
+ }
+
+ /* Print the name of event */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, event_name);
+ if (ret) {
+ goto end;
+ }
+
+ /* Print enabled ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ config_element_enabled, enabled);
+ if (ret) {
+ goto end;
+ }
+
+ /* Success ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_command_success, success);
+ if (ret) {
+ goto end;
+ }
+
+ /* Close event element */
+ ret = mi_lttng_writer_close_element(writer);
+end:
+ return ret;
+}
+
+/*
+ * disable_events
+ *
+ * Disabling event using the lttng API.
+ */
+static int disable_events(char *session_name)
+{
+ int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
+ int enabled = 1, success = 1;
+ char *event_name, *channel_name = NULL;
+ struct lttng_domain dom;
+ struct lttng_event event;
+
+ memset(&dom, 0, sizeof(dom));
+
+ /* Create lttng domain */
+ if (opt_kernel) {
+ dom.type = LTTNG_DOMAIN_KERNEL;
+ } else if (opt_userspace) {
+ dom.type = LTTNG_DOMAIN_UST;
+ } else if (opt_jul) {
+ dom.type = LTTNG_DOMAIN_JUL;
+ } else if (opt_log4j) {
+ dom.type = LTTNG_DOMAIN_LOG4J;
+ } else if (opt_python) {
+ dom.type = LTTNG_DOMAIN_PYTHON;
+ } else {
+ /* Checked by the caller. */
+ abort();
+ }
+
+ channel_name = opt_channel_name;
+
+ handle = lttng_create_handle(session_name, &dom);
+ if (handle == NULL) {
+ ret = -1;
+ goto error;
+ }
+
+ /* Mi print the channel and open the events element */
+ if (lttng_opt_mi) {
+ ret = mi_lttng_writer_open_element(writer, config_element_channel);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, print_channel_name(channel_name));
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Open events element */
+ ret = mi_lttng_writer_open_element(writer, config_element_events);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+ memset(&event, 0, sizeof(event));
+ /* Set default loglevel to any/unknown */
+ event.loglevel = -1;
+
+ /* opt_event_type contain the event type to disable at this point */
+ event.type = (lttng_event_type) opt_event_type;
+
+ if (opt_disable_all) {
+ command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
+ if (command_ret < 0) {
+ ERR("%s", lttng_strerror(command_ret));
+ enabled = 1;
+ success = 0;
+
+ } else {
+ enabled = 0;
+ success = 1;
+ MSG("All %s events of type %s are disabled in channel %s",
+ lttng_domain_type_str(dom.type),
+ print_event_type((lttng_event_type) opt_event_type),
+ print_channel_name(channel_name));
+ }
+
+ if (lttng_opt_mi) {
+ ret = mi_print_event("*", enabled, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+ } else {
+ /* Strip event list */
+ event_name = strtok(opt_event_list, ",");
+ while (event_name != NULL) {
+ DBG("Disabling event %s", event_name);
+
+ strncpy(event.name, event_name, sizeof(event.name));
+ event.name[sizeof(event.name) - 1] = '\0';
+ command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
+ if (command_ret < 0) {
+ ERR("%s of type %s : %s (channel %s, session %s)",
+ event_name,
+ print_event_type((lttng_event_type) opt_event_type),
+ lttng_strerror(command_ret),
+ command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
+ ? print_raw_channel_name(channel_name)
+ : print_channel_name(channel_name),
+ session_name);
+ warn = 1;
+ success = 0;
+ /*
+ * If an error occurred we assume that the event is still
+ * enabled.
+ */
+ enabled = 1;
+ } else {
+ MSG("%s %s of type %s disabled in channel %s for session %s",
+ lttng_domain_type_str(dom.type),
+ event_name,
+ print_event_type((lttng_event_type) opt_event_type),
+ print_channel_name(channel_name),
+ session_name);
+ success = 1;
+ enabled = 0;
+ }
+
+ if (lttng_opt_mi) {
+ ret = mi_print_event(event_name, enabled, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
+ /* Next event */
+ event_name = strtok(NULL, ",");
+ }
+ }
+
+end:
+ if (lttng_opt_mi) {
+ /* Close events element and channel element */
+ ret = mi_lttng_close_multi_element(writer, 2);
+ if (ret) {
+ ret = CMD_ERROR;
+ }
+ }
+error:
+ /* if there is already an error preserve it */
+ if (warn && !ret) {
+ ret = CMD_WARNING;
+ }
+
+ /* Overwrite ret if an error occurred */
+ ret = command_ret ? command_ret : ret;
+
+ lttng_destroy_handle(handle);
+ return ret;
+}
+
+/*
+ * cmd_disable_events
+ *
+ * Disable event to trace session
+ */
+int cmd_disable_events(int argc, const char **argv)
+{
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
+ static poptContext pc;
+ char *session_name = NULL;
+ const char *leftover = NULL;
+ int event_type = -1;
+
+ pc = poptGetContext(NULL, argc, argv, long_options, 0);
+ poptReadDefaultConfig(pc, 0);
+
+ /* Default event type */
+ opt_event_type = LTTNG_EVENT_ALL;
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case OPT_HELP:
+ SHOW_HELP();
+ goto end;
+ case OPT_TYPE_SYSCALL:
+ opt_event_type = LTTNG_EVENT_SYSCALL;
+ break;
+ case OPT_TYPE_TRACEPOINT:
+ opt_event_type = LTTNG_EVENT_TRACEPOINT;
+ break;
+ case OPT_TYPE_PROBE:
+ opt_event_type = LTTNG_EVENT_PROBE;
+ break;
+ case OPT_TYPE_FUNCTION:
+ opt_event_type = LTTNG_EVENT_FUNCTION;
+ break;
+ case OPT_TYPE_ALL:
+ opt_event_type = LTTNG_EVENT_ALL;
+ break;
+ case OPT_LIST_OPTIONS:
+ list_cmd_options(stdout, long_options);
+ goto end;
+ default:
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+
+ /* Validate event type. Multiple event type are not supported. */
+ if (event_type == -1) {
+ event_type = opt_event_type;
+ } else {
+ if (event_type != opt_event_type) {
+ ERR("Multiple event type not supported.");
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ }
+
+ ret = print_missing_or_multiple_domains(
+ opt_kernel + opt_userspace + opt_jul + opt_log4j +
+ opt_python,
+ true);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Ust and agent only support ALL event type */
+ if ((opt_userspace || opt_jul || opt_log4j || opt_python)
+ && opt_event_type != LTTNG_EVENT_ALL) {
+ ERR("Disabling userspace and agent (-j | -l | -p) event(s) based on instrumentation type is not supported.\n");
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ opt_event_list = (char*) poptGetArg(pc);
+ if (opt_event_list == NULL && opt_disable_all == 0) {
+ ERR("Missing event name(s).\n");
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ leftover = poptGetArg(pc);
+ if (leftover) {
+ ERR("Unknown argument: %s", leftover);
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ if (!opt_session_name) {
+ session_name = get_session_name();
+ if (session_name == NULL) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ session_name = opt_session_name;
+ }
+
+ /* Mi check */
+ if (lttng_opt_mi) {
+ writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
+ if (!writer) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Open command element */
+ ret = mi_lttng_writer_command_open(writer,
+ mi_lttng_element_command_disable_event);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Open output element */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_output);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+ command_ret = disable_events(session_name);
+ if (command_ret) {
+ success = 0;
+ }
+
+ /* Mi closing */
+ if (lttng_opt_mi) {
+ /* Close output element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_command_success, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Command element close */
+ ret = mi_lttng_writer_command_close(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+end:
+ if (!opt_session_name && session_name) {
+ free(session_name);
+ }
+
+ /* Mi clean-up */
+ if (writer && mi_lttng_writer_destroy(writer)) {
+ /* Preserve original error code */
+ ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
+ }
+
+ /* Overwrite ret if an error occurred in disable_events */
+ ret = command_ret ? command_ret : ret;
+
+ poptFreeContext(pc);
+ return ret;
+}
projects / lttng-tools.git / blobdiff