+++ /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 <stdbool.h>
-#include <lttng/lttng.h>
-
-#include "../command.h"
-
-#include <common/mi-lttng.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/utils.h>
-
-static char *opt_session_name;
-static int opt_destroy_all;
-static int opt_no_wait;
-
-#ifdef LTTNG_EMBED_HELP
-static const char help_msg[] =
-#include <lttng-destroy.1.h>
-;
-#endif
-
-/* Mi writer */
-static struct mi_writer *writer;
-
-enum {
- OPT_HELP = 1,
- OPT_LIST_OPTIONS,
-};
-
-static struct poptOption long_options[] = {
- /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
- {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
- {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0},
- {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
- {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-/*
- * destroy_session
- *
- * Unregister the provided session to the session daemon. On success, removes
- * the default configuration.
- */
-static int destroy_session(struct lttng_session *session)
-{
- int ret;
- char *session_name = NULL;
- bool session_was_already_stopped;
- enum lttng_error_code ret_code;
- struct lttng_destruction_handle *handle = NULL;
- enum lttng_destruction_handle_status status;
- bool newline_needed = false, printed_destroy_msg = false;
- enum lttng_rotation_state rotation_state;
- char *stats_str = NULL;
-
- ret = lttng_stop_tracing_no_wait(session->name);
- if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
- ERR("%s", lttng_strerror(ret));
- }
-
- session_was_already_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
- if (!opt_no_wait) {
- do {
- ret = lttng_data_pending(session->name);
- if (ret < 0) {
- /* Return the data available call error. */
- goto error;
- }
-
- /*
- * Data sleep time before retrying (in usec). Don't
- * sleep if the call returned value indicates
- * availability.
- */
- if (ret) {
- if (!printed_destroy_msg) {
- _MSG("Destroying session %s",
- session->name);
- newline_needed = true;
- printed_destroy_msg = true;
- fflush(stdout);
- }
-
- usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US);
- _MSG(".");
- fflush(stdout);
- }
- } while (ret != 0);
- }
-
- if (!session_was_already_stopped) {
- /*
- * Don't print the event and packet loss warnings since the user
- * already saw them when stopping the trace.
- */
- ret = get_session_stats_str(session->name, &stats_str);
- if (ret < 0) {
- goto error;
- }
- }
-
- ret_code = lttng_destroy_session_ext(session->name, &handle);
- if (ret_code != LTTNG_OK) {
- ret = -ret_code;
- goto error;
- }
-
- if (opt_no_wait) {
- goto skip_wait_rotation;
- }
-
- do {
- status = lttng_destruction_handle_wait_for_completion(
- handle, DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US /
- USEC_PER_MSEC);
- switch (status) {
- case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT:
- if (!printed_destroy_msg) {
- _MSG("Destroying session %s", session->name);
- newline_needed = true;
- printed_destroy_msg = true;
- }
- _MSG(".");
- fflush(stdout);
- break;
- case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED:
- break;
- default:
- ERR("%sFailed to wait for the completion of the destruction of session \"%s\"",
- newline_needed ? "\n" : "",
- session->name);
- newline_needed = false;
- ret = -1;
- goto error;
- }
- } while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT);
-
- status = lttng_destruction_handle_get_result(handle, &ret_code);
- if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
- ERR("%sFailed to get the result of session destruction",
- newline_needed ? "\n" : "");
- ret = -1;
- newline_needed = false;
- goto error;
- }
- if (ret_code != LTTNG_OK) {
- ret = -ret_code;
- goto error;
- }
-
- status = lttng_destruction_handle_get_rotation_state(
- handle, &rotation_state);
- if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
- ERR("%sFailed to get rotation state from destruction handle",
- newline_needed ? "\n" : "");
- newline_needed = false;
- goto skip_wait_rotation;
- }
-
- switch (rotation_state) {
- case LTTNG_ROTATION_STATE_NO_ROTATION:
- break;
- case LTTNG_ROTATION_STATE_COMPLETED:
- {
- const struct lttng_trace_archive_location *location;
-
- status = lttng_destruction_handle_get_archive_location(
- handle, &location);
- if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
- ret = print_trace_archive_location(
- location, session->name);
- if (ret) {
- ERR("%sFailed to print the location of trace archive",
- newline_needed ? "\n" : "");
- newline_needed = false;
- goto skip_wait_rotation;
- }
- break;
- }
- /* fall-through. */
- }
- default:
- ERR("%sFailed to get the location of the rotation performed during the session's destruction",
- newline_needed ? "\n" : "");
- newline_needed = false;
- goto skip_wait_rotation;
- }
-skip_wait_rotation:
- MSG("%sSession %s destroyed", newline_needed ? "\n" : "",
- session->name);
- newline_needed = false;
- if (stats_str) {
- MSG("%s", stats_str);
- }
-
- session_name = get_session_name_quiet();
- if (session_name && !strncmp(session->name, session_name, NAME_MAX)) {
- config_destroy_default();
- }
-
- if (lttng_opt_mi) {
- ret = mi_lttng_session(writer, session, 0);
- if (ret) {
- ret = CMD_ERROR;
- goto error;
- }
- }
-
- ret = CMD_SUCCESS;
-error:
- if (newline_needed) {
- MSG("");
- }
- lttng_destruction_handle_destroy(handle);
- free(session_name);
- free(stats_str);
- return ret;
-}
-
-/*
- * destroy_all_sessions
- *
- * Call destroy_sessions for each registered sessions
- */
-static int destroy_all_sessions(struct lttng_session *sessions, int count)
-{
- int i;
- bool error_occurred = false;
-
- LTTNG_ASSERT(count >= 0);
- if (count == 0) {
- MSG("No session found, nothing to do.");
- }
-
- for (i = 0; i < count; i++) {
- int ret = destroy_session(&sessions[i]);
-
- if (ret < 0) {
- ERR("%s during the destruction of session \"%s\"",
- lttng_strerror(ret),
- sessions[i].name);
- /* Continue to next session. */
- error_occurred = true;
- }
- }
-
- return error_occurred ? CMD_ERROR : CMD_SUCCESS;
-}
-
-/*
- * The 'destroy <options>' first level command
- */
-int cmd_destroy(int argc, const char **argv)
-{
- int opt;
- int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1;
- static poptContext pc;
- char *session_name = NULL;
- const char *leftover = NULL;
-
- struct lttng_session *sessions = NULL;
- int count;
- int found;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- SHOW_HELP();
- break;
- case OPT_LIST_OPTIONS:
- list_cmd_options(stdout, long_options);
- break;
- default:
- ret = CMD_UNDEFINED;
- break;
- }
- goto end;
- }
-
- /* Mi preparation */
- 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_destroy);
- 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;
- }
-
- /* For validation and semantic purpose we open a sessions element */
- ret = mi_lttng_sessions_open(writer);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
- }
-
- /* Recuperate all sessions for further operation */
- count = lttng_list_sessions(&sessions);
- if (count < 0) {
- ERR("%s", lttng_strerror(count));
- command_ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
-
- /* Ignore session name in case all sessions are to be destroyed */
- if (opt_destroy_all) {
- command_ret = destroy_all_sessions(sessions, count);
- if (command_ret) {
- success = 0;
- }
- } else {
- opt_session_name = (char *) poptGetArg(pc);
-
- if (!opt_session_name) {
- /* No session name specified, lookup default */
- session_name = get_session_name();
- if (session_name == NULL) {
- command_ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
- } else {
- session_name = opt_session_name;
- }
-
- /* Find the corresponding lttng_session struct */
- found = 0;
- for (i = 0; i < count; i++) {
- if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
- found = 1;
- command_ret = destroy_session(&sessions[i]);
- if (command_ret) {
- success = 0;
- ERR("%s during the destruction of session \"%s\"",
- lttng_strerror(command_ret),
- sessions[i].name);
- }
- }
- }
-
- if (!found) {
- ERR("Session name %s not found", session_name);
- command_ret = LTTNG_ERR_SESS_NOT_FOUND;
- success = 0;
- goto mi_closing;
- }
- }
-
- leftover = poptGetArg(pc);
- if (leftover) {
- ERR("Unknown argument: %s", leftover);
- ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
-
-mi_closing:
- /* Mi closing */
- if (lttng_opt_mi) {
- /* Close sessions and output element element */
- ret = mi_lttng_close_multi_element(writer, 2);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
-
- /* Success ? */
- 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:
- /* Mi clean-up */
- if (writer && mi_lttng_writer_destroy(writer)) {
- /* Preserve original error code */
- ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
- }
-
- if (opt_session_name == NULL) {
- free(session_name);
- }
-
- free(sessions);
-
- /* Overwrite ret if an error occurred during destroy_session/all */
- ret = command_ret ? command_ret : ret;
-
- poptFreeContext(pc);
- return ret;
-}
projects / lttng-tools.git / blobdiff