X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fdestroy.c;h=be0261d11b760b67561b52d324334c35f39162e7;hp=b7931595879b607dca82186f36905f7f6335abd2;hb=3285a971b225891df3dc7c2796176ce1f94665fe;hpb=c399183f4b3257c43915f3d81f44befd23165ad9 diff --git a/src/bin/lttng/commands/destroy.c b/src/bin/lttng/commands/destroy.c index b79315958..be0261d11 100644 --- a/src/bin/lttng/commands/destroy.c +++ b/src/bin/lttng/commands/destroy.c @@ -1,22 +1,21 @@ /* * Copyright (C) 2011 - David Goulet * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; only version 2 - * of the License. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2 only, + * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE +#define _LGPL_SOURCE #include #include #include @@ -24,89 +23,248 @@ #include #include #include +#include +#include #include "../command.h" +#include +#include +#include + 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 +; +#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} }; /* - * usage - */ -static void usage(FILE *ofp) -{ - fprintf(ofp, "usage: lttng destroy [options] [NAME]\n"); - fprintf(ofp, "\n"); - fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n"); - fprintf(ofp, "get it from the configuration directory (.lttng).\n"); - fprintf(ofp, "\n"); - fprintf(ofp, " -h, --help Show this help\n"); - fprintf(ofp, "\n"); -} - -/* - * Destroy a session removing the config directory and unregistering to the - * session daemon. + * destroy_session + * + * Unregister the provided session to the session daemon. On success, removes + * the default configuration. */ -static int destroy_session() +static int destroy_session(struct lttng_session *session) { int ret; - char *session_name, *path; + char *session_name = NULL; + bool session_was_stopped; + enum lttng_error_code ret_code; + struct lttng_destruction_handle *handle = NULL; + enum lttng_destruction_handle_status status; + bool printed_wait_msg = false; + enum lttng_rotation_state rotation_state; - if (opt_session_name == NULL) { - session_name = get_session_name(); - if (session_name == NULL) { - ret = CMD_ERROR; + ret = lttng_stop_tracing_no_wait(session->name); + if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { + ERR("%s", lttng_strerror(ret)); + } + session_was_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_wait_msg) { + _MSG("Waiting for destruction of session \"%s\"", + session->name); + printed_wait_msg = true; + fflush(stdout); + } + + usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); + _MSG("."); + fflush(stdout); + } + } while (ret != 0); + } + if (!session_was_stopped) { + /* + * Don't print the event and packet loss warnings since the user + * already saw them when stopping the trace. + */ + print_session_stats(session->name); + } + + 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_wait_msg) { + _MSG("Waiting for destruction of session \"%s\"", + session->name); + printed_wait_msg = true; + } + _MSG("."); + fflush(stdout); + break; + case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED: + break; + default: + ERR("Failed to wait for the completion of the destruction of session \"%s\"", + session->name); + ret = -1; goto error; } - } else { - session_name = opt_session_name; - } + } while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT); - ret = lttng_destroy_session(session_name); - if (ret < 0) { - goto free_name; + status = lttng_destruction_handle_get_result(handle, &ret_code); + if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { + ERR("Failed to get the result of session destruction"); + ret = -1; + goto error; + } + if (ret_code != LTTNG_OK) { + ret = -ret_code; + goto error; } - path = config_get_default_path(); - if (path == NULL) { - ret = CMD_FATAL; - goto free_name; + status = lttng_destruction_handle_get_rotation_state(handle, + &rotation_state); + if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { + ERR("Failed to get rotation state from destruction handle"); + 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; - if (opt_session_name == NULL) { - config_destroy(path); - MSG("Session %s destroyed at %s", session_name, path); - } else { - MSG("Session %s destroyed", session_name); + status = lttng_destruction_handle_get_archive_location(handle, + &location); + if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { + if (printed_wait_msg) { + MSG(""); + printed_wait_msg = false; + } + ret = print_trace_archive_location(location, + session->name); + if (ret) { + ERR("Failed to print the location of trace archive"); + goto skip_wait_rotation; + } + break; + } + /* fall-through. */ + } + default: + ERR("Failed to get the location of the rotation performed during the session's destruction"); + goto skip_wait_rotation; } +skip_wait_rotation: + MSG("%sSession \"%s\" destroyed", printed_wait_msg ? "\n" : "", + session->name); + printed_wait_msg = false; - ret = CMD_SUCCESS; + session_name = get_session_name_quiet(); + if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { + config_destroy_default(); + } -free_name: - if (opt_session_name == NULL) { - free(session_name); + if (lttng_opt_mi) { + ret = mi_lttng_session(writer, session, 0); + if (ret) { + ret = CMD_ERROR; + goto error; + } } + + ret = CMD_SUCCESS; error: + if (printed_wait_msg) { + MSG(""); + } + lttng_destruction_handle_destroy(handle); + free(session_name); 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; + + 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 ' first level command */ int cmd_destroy(int argc, const char **argv) { - int opt, ret = CMD_SUCCESS; + 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; + int count; + int found; pc = poptGetContext(NULL, argc, argv, long_options, 0); poptReadDefaultConfig(pc, 0); @@ -114,19 +272,150 @@ int cmd_destroy(int argc, const char **argv) while ((opt = poptGetNextOpt(pc)) != -1) { switch (opt) { case OPT_HELP: - usage(stderr); - goto end; + SHOW_HELP(); + break; + case OPT_LIST_OPTIONS: + list_cmd_options(stdout, long_options); + break; default: - usage(stderr); 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; } - opt_session_name = (char*) poptGetArg(pc); + /* 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; + } - ret = destroy_session(); + /* 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); + } + + /* Overwrite ret if an error occurred during destroy_session/all */ + ret = command_ret ? command_ret : ret; + + poptFreeContext(pc); return ret; }