* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
+#include <assert.h>
+#include <ctype.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
+#include <signal.h>
+#include <sys/wait.h>
+
+#include <common/mi-lttng.h>
+#include <common/config/session-config.h>
#include "../command.h"
#include "../utils.h"
+#include <common/defaults.h>
#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/uri.h>
+#include <common/utils.h>
+#include <lttng/snapshot.h>
static char *opt_output_path;
static char *opt_session_name;
+static char *opt_url;
+static char *opt_ctrl_url;
+static char *opt_data_url;
+static char *opt_shm_path;
+static char *opt_template_path;
+static int opt_no_consumer;
+static int opt_no_output;
+static int opt_snapshot;
+static unsigned int opt_live_timer;
enum {
OPT_HELP = 1,
OPT_LIST_OPTIONS,
+ OPT_LIVE_TIMER,
+};
+
+enum output_type {
+ OUTPUT_UNKNOWN = -1,
+ OUTPUT_NONE,
+ OUTPUT_LOCAL,
+ OUTPUT_NET,
+};
+enum session_type {
+ SESSION_UNKNOWN = -1,
+ SESSION_NORMAL,
+ SESSION_LIVE,
+ SESSION_SNAPSHOT,
};
+
+static struct mi_writer *writer;
+
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
{"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
{"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL},
{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
+ {"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0},
+ {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
+ {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
+ {"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0},
+ {"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0},
+ {"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0},
+ {"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0},
+ {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0},
+ {"template-path", 0, POPT_ARG_STRING, &opt_template_path, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
};
/*
- * usage
+ * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on
+ * why this declaration exists and used ONLY in for this command.
+ */
+extern int _lttng_create_session_ext(const char *name, const char *url,
+ const char *datetime);
+
+/*
+ * Retrieve the created session and mi output it based on provided argument
+ * This is currently a summary of what was pretty printed and is subject to
+ * enhancements.
+ */
+static int mi_created_session(const char *session_name)
+{
+ int ret, i, count, found;
+ struct lttng_session *sessions;
+
+ /* session_name should not be null */
+ assert(session_name);
+ assert(writer);
+
+ count = lttng_list_sessions(&sessions);
+ if (count < 0) {
+ ret = count;
+ ERR("%s", lttng_strerror(ret));
+ goto error;
+ }
+
+ if (count == 0) {
+ ERR("Error session creation failed: session %s not found", session_name);
+ ret = -LTTNG_ERR_SESS_NOT_FOUND;
+ goto end;
+ }
+
+ found = 0;
+ for (i = 0; i < count; i++) {
+ if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
+ found = 1;
+ ret = mi_lttng_session(writer, &sessions[i], 0);
+ if (ret) {
+ goto error;
+ }
+ break;
+ }
+ }
+
+ if (!found) {
+ ret = -LTTNG_ERR_SESS_NOT_FOUND;
+ } else {
+ ret = CMD_SUCCESS;
+ }
+
+error:
+ free(sessions);
+end:
+ return ret;
+}
+
+/*
+ * For a session name, set the consumer URLs.
+ */
+static int set_consumer_url(const char *session_name, const char *ctrl_url,
+ const char *data_url)
+{
+ int ret;
+ struct lttng_handle *handle;
+
+ assert(session_name);
+
+ /*
+ * Set handle with the session_name, but no domain. This implies that
+ * the actions taken with this handle apply on the tracing session
+ * rather then the domain-specific session.
+ */
+ handle = lttng_create_handle(session_name, NULL);
+ if (handle == NULL) {
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ ret = lttng_set_consumer_url(handle, ctrl_url, data_url);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ lttng_destroy_handle(handle);
+ return ret;
+}
+
+static int add_snapshot_output(const char *session_name, const char *ctrl_url,
+ const char *data_url)
+{
+ int ret;
+ struct lttng_snapshot_output *output = NULL;
+
+ assert(session_name);
+
+ output = lttng_snapshot_output_create();
+ if (!output) {
+ ret = CMD_FATAL;
+ goto error_create;
+ }
+
+ if (ctrl_url) {
+ ret = lttng_snapshot_output_set_ctrl_url(ctrl_url, output);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+
+ if (data_url) {
+ ret = lttng_snapshot_output_set_data_url(data_url, output);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+
+ /* This call, if successful, populates the id of the output object. */
+ ret = lttng_snapshot_add_output(session_name, output);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ lttng_snapshot_output_destroy(output);
+error_create:
+ return ret;
+}
+
+/*
+ * Validate the combinations of passed options
+ *
+ * CMD_ERROR on error
+ * CMD_SUCCESS on success
+ */
+static int validate_command_options(enum session_type type)
+{
+ int ret = CMD_SUCCESS;
+
+ if (opt_snapshot && opt_live_timer) {
+ ERR("Snapshot and live modes are mutually exclusive.");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) {
+ ERR("Control and data URLs must both be set.");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ if (opt_template_path) {
+ /* Restriction on flags exist when using template */
+ /* Session type flags are not permitted */
+ /* --live & --snapshot */
+ if ((opt_live_timer && type != SESSION_LIVE) ||
+ (opt_snapshot && type != SESSION_SNAPSHOT)) {
+ ERR("It is not possible to change the session type of a template");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Create a session using direct calls to liblttng-ctl.
+ *
+ * Return CMD_SUCCESS on success, negative value on internal lttng errors and positive
+ * value on command errors.
*/
-static void usage(FILE *ofp)
+static int create_session_basic (const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char* url,
+ const char* ctrl_url,
+ const char* data_url,
+ const char* shm_path,
+ const char* datetime)
{
- fprintf(ofp, "usage: lttng create [options] [NAME]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " The default NAME is 'auto-yyyymmdd-hhmmss'\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -o, --output PATH Specify output path for traces\n");
- fprintf(ofp, "\n");
+ /* Create session based on session creation */
+ int ret = CMD_SUCCESS;
+ const char *pathname;
+
+ assert(datetime);
+
+ if (opt_relayd_path) {
+ pathname = opt_relayd_path;
+ } else {
+ pathname = INSTALL_BIN_PATH "/lttng-relayd";
+ }
+
+ switch (session_type) {
+ case SESSION_NORMAL:
+ ret = _lttng_create_session_ext(session_name, url, datetime);
+ break;
+ case SESSION_SNAPSHOT:
+ if (output_type == OUTPUT_NONE) {
+ ERR("--no-output on a snapshot session is invalid");
+ ret = CMD_UNSUPPORTED;
+ goto error;
+ }
+ ret = lttng_create_session_snapshot(session_name, url);
+ break;
+ case SESSION_LIVE:
+ if (output_type == OUTPUT_NONE) {
+ ERR("--no-output on a live session is invalid");
+ ret = CMD_UNSUPPORTED;
+ goto error;
+ }
+
+ if (output_type == OUTPUT_LOCAL) {
+ ERR("Local file output on a live session is invalid");
+ ret = CMD_UNSUPPORTED;
+ goto error;
+ }
+ if (output_type != OUTPUT_NET && !check_relayd() &&
+ spawn_relayd(pathname, 0) < 0) {
+ ret = CMD_FATAL;
+ goto error;
+ }
+ ret = lttng_create_session_live(session_name, url, live_timer);
+ break;
+ default:
+ ERR("Unknown session type");
+ ret = CMD_UNDEFINED;
+ goto error;
+ }
+
+ if (ret < 0) {
+ /* Don't set ret so the sessiond error is propagated. */
+ switch (-ret) {
+ case LTTNG_ERR_EXIST_SESS:
+ WARN("Session %s already exists", session_name);
+ break;
+ default:
+ break;
+ }
+ goto error;
+ }
+
+ /* Configure the session based on the output type */
+ switch (output_type) {
+ case OUTPUT_LOCAL:
+ break;
+ case OUTPUT_NET:
+ if (!ctrl_url || !data_url) {
+ break;
+ }
+
+ if (session_type == SESSION_SNAPSHOT) {
+ ret = add_snapshot_output(session_name, ctrl_url,
+ data_url);
+ } else {
+ /*
+ * Normal sessions and live sessions behave the same way
+ * regarding consumer url.
+ */
+ ret = set_consumer_url(session_name, ctrl_url, data_url);
+ }
+ if (ret < 0) {
+ /* Destroy created session on errors */
+ lttng_destroy_session(session_name);
+ goto error;
+ }
+ break;
+ case OUTPUT_NONE:
+ break;
+ default:
+ ERR("Unknown output type");
+ ret = CMD_UNDEFINED;
+ goto error;
+ }
+
+ /*
+ * Set the session shared memory path
+ */
+ if (shm_path) {
+ ret = lttng_set_session_shm_path(session_name, shm_path);
+ if (ret < 0) {
+ lttng_destroy_session(session_name);
+ goto error;
+ }
+ }
+error:
+ return ret;
+}
+
+static int generate_output(const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char* url,
+ const char* ctrl_url,
+ const char* data_url,
+ const char* shm_path)
+{
+ int ret = CMD_SUCCESS;
+
+ /*
+ * TODO move this to after session name
+ * for now we only emulate previous behaviour.
+ */
+ if (session_type != SESSION_SNAPSHOT) {
+ if (ctrl_url) {
+ MSG("Control URL %s set for session %s", ctrl_url, session_name);
+ }
+
+ if (data_url) {
+ MSG("Data URL %s set for session %s", data_url, session_name);
+ }
+ }
+
+ if (url && output_type == OUTPUT_LOCAL) {
+ /* Remove the file:// */
+ if (strlen(url) > strlen("file://")){
+ url = url + strlen("file://");
+ }
+ }
+
+ MSG("Session %s created.", session_name);
+ if (url && session_type != SESSION_SNAPSHOT) {
+ MSG("Traces will be written in %s", url);
+
+ if (live_timer) {
+ MSG("Live timer set to %u usec", live_timer);
+ }
+ } else if (session_type == SESSION_SNAPSHOT) {
+ if (url) {
+ MSG("Default snapshot output set to: %s", url);
+ }
+ MSG("Snapshot mode set. Every channel enabled for that session will "
+ "be set to mmap output, and default to overwrite mode.");
+ }
+
+ if (shm_path) {
+ MSG("Session %s set to shm_path: %s.", session_name,
+ shm_path);
+ }
+
+ /* Mi output */
+ if (lttng_opt_mi) {
+ ret = mi_created_session(session_name);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+error:
+ return ret;
+}
+
+static int parse_template (struct config_document *template,
+ char **session_name,
+ enum session_type *session_type,
+ int *live_timer,
+ enum output_type *output_type,
+ char **url,
+ char **ctrl_url,
+ char **data_url,
+ char **shm_path)
+{
+ int ret = 0;
+ int printed_bytes;
+ char *raw_value = NULL;
+
+ assert(template);
+
+ /* Session name */
+ *session_name = config_document_get_element_value(template,"/sessions/session/name");
+
+ /* Check the type of session we have in the template */
+ if(config_document_element_exist(template, "/sessions/session/attributes/snapshot_mode")) {
+ *session_type = SESSION_SNAPSHOT;
+ } else if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) {
+ *session_type = SESSION_LIVE;
+ raw_value = config_document_get_element_value(template,"/sessions/session/attributes/live_timer_interval");
+ *live_timer = config_parse_value(raw_value);
+ free(raw_value);
+ raw_value = NULL;
+ } else {
+ *session_type = SESSION_NORMAL;
+ }
+
+ /* Output */
+ switch (*session_type) {
+ case SESSION_NORMAL:
+ case SESSION_LIVE:
+ if (!config_document_element_exist(template, "/sessions/session/output/consumer_output/destination")){
+ break;
+ }
+ if (config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/path")){
+ raw_value = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/path");
+ if (!raw_value) {
+ ret = -1;
+ goto error;
+ }
+
+ if (strlen(raw_value) > 0) {
+ *output_type = OUTPUT_LOCAL;
+ printed_bytes = asprintf(url, "file://%s", raw_value);
+ if (printed_bytes < 0) {
+ ret = -1;
+ goto error;
+ }
+ } else {
+ *output_type = OUTPUT_NONE;
+ }
+
+ free(raw_value);
+ raw_value = NULL;
+ break;
+ } else if(config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/net_output")) {
+ *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/control_uri");
+ *data_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/data_uri");
+ if (!*ctrl_url || ! *data_url) {
+ ret = -1;
+ goto error;
+ }
+ *output_type = OUTPUT_NET;
+ } else {
+ /* There is no output definition */
+ }
+ break;
+ case SESSION_SNAPSHOT:
+ if (!config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination")){
+ break;
+ }
+ if (config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path")){
+ raw_value = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path");
+ if (!raw_value) {
+ ret = -1;
+ goto error;
+ }
+
+ if (strlen(raw_value) > 0) {
+ *output_type = OUTPUT_LOCAL;
+ printed_bytes = asprintf(url, "file://%s", raw_value);
+ if (printed_bytes < 0) {
+ ret = -1;
+ goto error;
+ }
+ } else {
+ *output_type = OUTPUT_NONE;
+ }
+
+ free(raw_value);
+ raw_value = NULL;
+ break;
+ } else if(config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output")) {
+ *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/control_uri");
+ *data_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/data_uri");
+ if (!*ctrl_url || ! *data_url) {
+ ret = -1;
+ goto error;
+ }
+ *output_type = OUTPUT_NET;
+ } else {
+ /* There is no output definition */
+ }
+ break;
+ case SESSION_UNKNOWN:
+ ret = -1;
+ goto error;
+ }
+
+
+ /* shared memory path */
+ *shm_path = config_document_get_element_value(template,"/sessions/session/shared_memory_path");
+
+error:
+ free(raw_value);
+ return ret;
+
+}
+static int create_session_from_template(struct config_document *template,
+ const char *session_name,
+ enum session_type session_type,
+ int live_timer,
+ enum output_type output_type,
+ const char *url,
+ const char *ctrl_url,
+ const char *data_url,
+ const char *shm_path,
+ const char *datetime)
+{
+ int ret = CMD_SUCCESS;
+ int printed_bytes;
+ struct config_element *temp_element = NULL;
+ struct config_element *temp_element_child = NULL;
+ char tmp_ctrl_uri[PATH_MAX];
+ char tmp_data_uri[PATH_MAX];
+ struct lttng_uri *uris = NULL;
+ ssize_t uri_array_size = 0;
+ char *tmp_string = NULL;
+
+ assert(template);
+ assert(session_name);
+
+ memset(tmp_ctrl_uri, 0, sizeof(tmp_ctrl_uri));
+ memset(tmp_data_uri, 0, sizeof(tmp_data_uri));
+
+ /* Session name */
+ if (config_document_element_exist(template, "/sessions/session/name")) {
+ /* Replace the node value */
+ config_document_replace_element_value(template, "/sessions/session/name", session_name);
+ } else {
+ /* insert the node */
+ temp_element = config_element_create("name", session_name);
+ if (!temp_element) {
+ ERR("Could not create session name node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
+ if (ret) {
+ ERR("Could not insert session name node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ config_element_free(temp_element);
+ }
+
+ /*
+ * Live timer
+ */
+ if (session_type == SESSION_LIVE) {
+ if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) {
+ printed_bytes = asprintf(&tmp_string, "%d", live_timer);
+ if (printed_bytes < 0) {
+ ERR("Asprintf failed for live timer");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ ret = config_document_replace_element_value(template, "/sessions/session/attributes/live_timer_interval", tmp_string);
+
+ if (ret) {
+ printf("error: %d\n", ret);
+ ERR("Replacement of live_timer_interval failed");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ free(tmp_string);
+ tmp_string = NULL;
+ } else {
+ ERR("Invalid live timer template. Missing live timer node");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ }
+
+ /*
+ * Generate the output node
+ */
+
+ /* Get output from urls */
+ if (url) {
+ /* Get lttng uris from single url */
+ uri_array_size = uri_parse_str_urls(url, NULL, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else if (ctrl_url && data_url) {
+ uri_array_size = uri_parse_str_urls(ctrl_url, data_url, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* --no-output */
+ uri_array_size = 0;
+ }
+
+ /* Validate if the session output type still match the passed data */
+ if ( (uri_array_size == 0 && output_type != OUTPUT_NONE) ||
+ (uri_array_size == 1 && output_type != OUTPUT_LOCAL) ||
+ (uri_array_size == 2 && output_type != OUTPUT_NET)) {
+ ERR("Overwriting value for output do not match the base output type");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ switch (output_type) {
+ case OUTPUT_NONE:
+ temp_element_child = config_element_create("path", "");
+ if (!temp_element_child) {
+ ERR("Could not create empty path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ break;
+ case OUTPUT_LOCAL:
+ temp_element_child = config_element_create("path", uris[0].dst.path);
+ if (!temp_element_child) {
+ ERR("Could not create local path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ break;
+ case OUTPUT_NET:
+ uri_to_str_url(&uris[0], tmp_ctrl_uri, sizeof(tmp_ctrl_uri));
+ uri_to_str_url(&uris[1], tmp_data_uri, sizeof(tmp_data_uri));
+
+ temp_element_child = config_element_create("net_output", NULL);
+ if (!temp_element_child) {
+ ERR("Could not create net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ temp_element = config_element_create("control_uri", tmp_ctrl_uri);
+ if (!temp_element_child) {
+ ERR("Could not create ctrl uri node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element_child, temp_element);
+ if (ret) {
+ ERR("Could not append control uri to the net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+
+ temp_element = config_element_create("data_uri", tmp_data_uri);
+
+ if (!temp_element_child) {
+ ERR("Could not create data_uri configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element_child, temp_element);
+ if (ret) {
+ ERR("Could not append data uri to the net_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ config_element_free(temp_element);
+ temp_element = NULL;
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ temp_element = config_element_create("destination", NULL);
+ if (!temp_element) {
+ ERR("Could not create destination node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the destination node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+ /* Construct the output/consumer_output/ node*/
+ temp_element_child = temp_element;
+ temp_element = config_element_create("consumer_output", NULL);
+ if (!temp_element) {
+ ERR("Could not create consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = config_element_create("enabled", "true");
+ if (!temp_element_child) {
+ ERR("Could not create enbaled node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append node to the consumer_output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+
+ temp_element_child = temp_element;
+ temp_element = config_element_create("output", NULL);
+ if (!temp_element) {
+ ERR("Could not create output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+
+ /*
+ * validate and replace the destination node for each session type
+ * TODO: export string as const and simply assign a base path for the
+ * destination node based on the session type
+ **/
+ switch (session_type) {
+ case SESSION_NORMAL:
+ case SESSION_LIVE:
+ break;
+ case SESSION_SNAPSHOT:
+ /* construct the output/snapshots_outputs/ */
+ temp_element_child = temp_element;
+ temp_element = config_element_create("snapshot_outputs", NULL);
+ if (!temp_element) {
+ ERR("Could not create snapshot_outputs node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the snapshot_outputs node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+
+ temp_element_child = temp_element;
+ temp_element = config_element_create("output", NULL);
+ if (!temp_element) {
+ ERR("Could not create output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ret = config_element_add_child(temp_element, temp_element_child);
+ if (ret) {
+ ERR("Could not append output data to the output node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element_child);
+ temp_element_child = NULL;
+ break;
+ default:
+ ERR("Invalid session type");
+ ret = CMD_UNDEFINED;
+ goto error;
+ }
+
+ if (!config_document_element_exist(template, "/sessions/session/output")) {
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
+ } else {
+ ret = config_document_replace_element(template, "/sessions/session/output", temp_element);
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+
+ if (ret) {
+ ERR("%s", lttng_strerror(ret));
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+
+ /* Shm path */
+ if (shm_path && config_document_element_exist(template, "/sessions/session/shared_memory_path")) {
+ /* Replace the node value */
+ config_document_replace_element_value(template, "/sessions/session/shared_memory_path", shm_path);
+ } else if (shm_path) {
+ /* insert the node */
+ temp_element = config_element_create("shared_memory_path", shm_path);
+ if (!temp_element) {
+ ERR("Could not create shared_memory_path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ ret = config_document_insert_element(template, "/sessions/session", temp_element);
+ if (ret) {
+ ERR("Could not insert shared_memory_path node configuration");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ config_element_free(temp_element);
+ temp_element = NULL;
+ }
+
+ ret = config_load_configuration_sessions(template, session_name, 0);
+
+
+error:
+ config_element_free(temp_element);
+ config_element_free(temp_element_child);
+ free(tmp_string);
+ free(uris);
+ return ret;
+
}
/*
*
* Returns one of the CMD_* result constants.
*/
-static int create_session()
+static int create_session(void)
{
- int ret, have_name = 0;
+ int ret;
+ int printed_bytes;
+
+
+ /* Template */
+ struct config_document *template = NULL;
+
+ /* Base data */
+ enum session_type base_session_type = SESSION_UNKNOWN;
+ enum output_type base_output_type = OUTPUT_UNKNOWN;
+ char *base_session_name = NULL;
+ char *base_url = NULL;
+ char *base_ctrl_url = NULL;
+ char *base_data_url = NULL;
+ char *base_shm_path = NULL;
+ int base_live_timer = 0;
+
+ /* Time data */
char datetime[16];
- char *session_name, *traces_path = NULL, *alloc_path = NULL;
time_t rawtime;
- struct tm *timeinfo;
+ struct tm *timeinfo = NULL;
+
+ /* Temporary variables */
+ char *traces_path = NULL;
+ char *temp_url = NULL;
+ char *session_name_date = NULL;
+ char *tmp_url = NULL;
+ char *tmp_home_path = NULL;
+ struct lttng_uri *uris = NULL;
+ ssize_t uri_array_size = 0;
+
/* Get date and time for automatic session name/path */
time(&rawtime);
timeinfo = localtime(&rawtime);
strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
- /* Auto session name creation */
- if (opt_session_name == NULL) {
- ret = asprintf(&session_name, "auto-%s", datetime);
- if (ret < 0) {
- perror("asprintf session name");
+ if (opt_template_path) {
+ /* Restriction on flags exist when using template */
+ /* Session type flags are not permitted */
+ /* --live & --snapshot */
+ template = config_document_get(opt_template_path);
+ if (!template) {
+ ERR("Template could not be parsed");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ /* Load info from template if any */
+ /* TODO: might want to use a struct in the end for the session... */
+ ret = parse_template(template, &base_session_name,
+ &base_session_type,
+ &base_live_timer,
+ &base_output_type,
+ &base_url,
+ &base_ctrl_url,
+ &base_data_url,
+ &base_shm_path);
+ if (ret) {
goto error;
}
- DBG("Auto session name set to %s", session_name);
- } else {
- session_name = opt_session_name;
- have_name = 1;
}
- /* Auto output path */
- if (opt_output_path == NULL) {
- alloc_path = strdup(config_get_default_path());
- if (alloc_path == NULL) {
- ERR("Home path not found.\n \
- Please specify an output path using -o, --output PATH");
- ret = CMD_FATAL;
+ /* Option validation */
+ if (validate_command_options(base_session_type) != CMD_SUCCESS) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Find the session type based on options */
+ if(base_session_type == SESSION_UNKNOWN) {
+ if (opt_snapshot) {
+ base_session_type = SESSION_SNAPSHOT;
+ } else if (opt_live_timer) {
+ base_session_type = SESSION_LIVE;
+ } else {
+ base_session_type = SESSION_NORMAL;
+ }
+ }
+
+ /*
+ * Session name handling
+ */
+ if (opt_session_name) {
+ /* Override the session name */
+ if (strlen(opt_session_name) > NAME_MAX) {
+ ERR("Session name too long. Length must be lower or equal to %d",
+ NAME_MAX);
+ ret = LTTNG_ERR_SESSION_FAIL;
+ free(session_name_date);
goto error;
}
+ /*
+ * Check if the session name begins with "auto-" or is exactly "auto".
+ * Both are reserved for the default session name. See bug #449 to
+ * understand why we need to check both here.
+ */
+ if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
+ strlen(DEFAULT_SESSION_NAME) + 1) == 0) ||
+ (strncmp(opt_session_name, DEFAULT_SESSION_NAME,
+ strlen(DEFAULT_SESSION_NAME)) == 0 &&
+ strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
+ ERR("%s is a reserved keyword for default session(s)",
+ DEFAULT_SESSION_NAME);
- if (have_name) {
- ret = asprintf(&traces_path, "%s/" DEFAULT_TRACE_DIR_NAME
- "/%s-%s", alloc_path, session_name, datetime);
- } else {
- ret = asprintf(&traces_path, "%s/" DEFAULT_TRACE_DIR_NAME
- "/%s", alloc_path, session_name);
+ ret = CMD_ERROR;
+ goto error;
}
- if (ret < 0) {
- perror("asprintf trace dir name");
+ base_session_name = strndup(opt_session_name, NAME_MAX);
+ if (!base_session_name) {
+ PERROR("Strdup session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ DBG("Session name from command option set to %s", base_session_name);
+ } else if (base_session_name) {
+ printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
goto error;
}
} else {
- traces_path = opt_output_path;
+ /* Generate a name */
+ printed_bytes = asprintf(&base_session_name, DEFAULT_SESSION_NAME "-%s", datetime);
+ if (printed_bytes < 0) {
+ PERROR("Asprintf session name");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ session_name_date = strdup(base_session_name);
+ DBG("Auto session name set to %s", base_session_name);
}
- ret = lttng_create_session(session_name, traces_path);
- if (ret < 0) {
- /* Don't set ret so lttng can interpret the sessiond error. */
- switch (-ret) {
- case LTTCOMM_EXIST_SESS:
- WARN("Session %s already exists", session_name);
+
+ /*
+ * Output handling
+ */
+
+ /*
+ * If any of those options are present clear all output related data.
+ */
+ if (opt_output_path || opt_url || (opt_ctrl_url && opt_data_url) || opt_no_output) {
+ /* Overwrite output */
+ free(base_url);
+ free(base_ctrl_url);
+ free(base_data_url);
+ base_url = NULL;
+ base_ctrl_url = NULL;
+ base_data_url = NULL;
+ }
+
+ if (opt_output_path) {
+
+ traces_path = utils_expand_path(opt_output_path);
+ if (!traces_path) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Create URL string from the local file system path */
+ printed_bytes = asprintf(&temp_url, "file://%s", traces_path);
+ if (printed_bytes < 0) {
+ PERROR("asprintf url path");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ base_url = temp_url;
+ } else if (opt_url) { /* Handling URL (-U opt) */
+ base_url = strdup(opt_url);
+ } else if (opt_data_url && opt_ctrl_url) {
+ /*
+ * With both control and data, we'll be setting the consumer URL
+ * after session creation thus use no URL.
+ */
+ base_ctrl_url = strdup(opt_ctrl_url);
+ base_data_url = strdup(opt_data_url);
+ } else if (!(opt_no_output || base_output_type == OUTPUT_NONE ||
+ base_url || base_ctrl_url || base_data_url)) {
+ /* Generate default output depending on the session type */
+ switch (base_session_type) {
+ case SESSION_NORMAL:
+ /* fallthrough */
+ case SESSION_SNAPSHOT:
+ /* Default to a local path */
+ tmp_home_path = utils_get_home_dir();
+ if (tmp_home_path == NULL) {
+ ERR("HOME path not found.\n \
+ Please specify an output path using -o, --output PATH");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ printed_bytes = asprintf(&tmp_url,
+ "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
+ tmp_home_path, session_name_date);
+
+ if (printed_bytes < 0) {
+ PERROR("asprintf trace dir name");
+ ret = CMD_FATAL;
+ goto error;
+ }
+
+ base_url = tmp_url ;
break;
+ case SESSION_LIVE:
+ /* Default to a net output */
+ printed_bytes = asprintf(&tmp_url, "net://127.0.0.1");
+ if (printed_bytes < 0) {
+ PERROR("asprintf default live URL");
+ ret = CMD_FATAL;
+ goto error;
+ }
+ base_url = tmp_url ;
+ break;
+ default:
+ ERR("Unknown session type");
+ ret = CMD_FATAL;
+ goto error;
+ }
+ }
+
+ /*
+ * Shared memory path handling
+ */
+ if (opt_shm_path) {
+ /* Overwrite shm_path so clear any previously defined one */
+ free(base_shm_path);
+ printed_bytes = asprintf(&base_shm_path, "%s/%s", opt_shm_path, session_name_date);
+ if (printed_bytes < 0) {
+ PERROR("asprintf shm_path");
+ ret = CMD_FATAL;
+ goto error;
}
+ }
+
+ /*
+ * Live timer handling
+ */
+ if (opt_live_timer) {
+ base_live_timer = opt_live_timer;
+ }
+
+ /* Get output type from urls */
+ /* TODO: Find a better way of inferring output type */
+ if (base_url) {
+ /* Get lttng uris from single url */
+ uri_array_size = uri_parse_str_urls(base_url, NULL, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else if (base_ctrl_url && base_data_url) {
+ uri_array_size = uri_parse_str_urls(base_ctrl_url, base_data_url, &uris);
+ if (uri_array_size < 0) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* --no-output */
+ uri_array_size = 0;
+ }
+
+ switch (uri_array_size) {
+ case 0:
+ base_output_type = OUTPUT_NONE;
+ break;
+ case 1:
+ base_output_type = OUTPUT_LOCAL;
+ break;
+ case 2:
+ base_output_type = OUTPUT_NET;
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ if (template) {
+ ret = create_session_from_template(template,
+ base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path,
+ datetime);
+ } else {
+ ret = create_session_basic(base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path,
+ datetime);
+ }
+ if (ret) {
+ goto error;
+ }
+
+ ret = generate_output(base_session_name,
+ base_session_type,
+ base_live_timer,
+ base_output_type,
+ base_url,
+ base_ctrl_url,
+ base_data_url,
+ base_shm_path);
+ if (ret) {
goto error;
}
/* Init lttng session config */
- ret = config_init(session_name);
+ ret = config_init(base_session_name);
if (ret < 0) {
ret = CMD_ERROR;
goto error;
}
- MSG("Session %s created.", session_name);
- MSG("Traces will be written in %s" , traces_path);
-
ret = CMD_SUCCESS;
error:
- if (opt_session_name == NULL) {
- free(session_name);
+ /* Session temp stuff */
+ config_document_free(template);
+ free(session_name_date);
+ free(uris);
+ free(traces_path);
+
+ if (ret < 0) {
+ ERR("%s", lttng_strerror(ret));
}
- if (alloc_path) {
- free(alloc_path);
+ free(base_session_name);
+ free(base_url);
+ free(base_ctrl_url);
+ free(base_data_url);
+ free(base_shm_path);
+ return ret;
+}
+
+/*
+ * spawn_sessiond
+ *
+ * Spawn a session daemon by forking and execv.
+ */
+static int spawn_sessiond(char *pathname)
+{
+ int ret = 0;
+ pid_t pid;
+
+ MSG("Spawning a session daemon");
+ pid = fork();
+ if (pid == 0) {
+ /*
+ * Spawn session daemon in daemon mode.
+ */
+ execlp(pathname, "lttng-sessiond",
+ "--daemonize", NULL);
+ /* execlp only returns if error happened */
+ if (errno == ENOENT) {
+ ERR("No session daemon found. Use --sessiond-path.");
+ } else {
+ PERROR("execlp");
+ }
+ kill(getppid(), SIGTERM); /* wake parent */
+ exit(EXIT_FAILURE);
+ } else if (pid > 0) {
+ /*
+ * In daemon mode (--daemonize), sessiond only exits when
+ * it's ready to accept commands.
+ */
+ for (;;) {
+ int status;
+ pid_t wait_pid_ret = waitpid(pid, &status, 0);
+
+ if (wait_pid_ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ PERROR("waitpid");
+ ret = -errno;
+ goto end;
+ }
+
+ if (WIFSIGNALED(status)) {
+ ERR("Session daemon was killed by signal %d",
+ WTERMSIG(status));
+ ret = -1;
+ goto end;
+ } else if (WIFEXITED(status)) {
+ DBG("Session daemon terminated normally (exit status: %d)",
+ WEXITSTATUS(status));
+
+ if (WEXITSTATUS(status) != 0) {
+ ERR("Session daemon terminated with an error (exit status: %d)",
+ WEXITSTATUS(status));
+ ret = -1;
+ goto end;
+ }
+ break;
+ }
+ }
+
+ goto end;
+ } else {
+ PERROR("fork");
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * launch_sessiond
+ *
+ * Check if the session daemon is available using
+ * the liblttngctl API for the check. If not, try to
+ * spawn a daemon.
+ */
+static int launch_sessiond(void)
+{
+ int ret;
+ char *pathname = NULL;
+
+ ret = lttng_session_daemon_alive();
+ if (ret) {
+ /* Sessiond is alive, not an error */
+ ret = 0;
+ goto end;
+ }
+
+ /* Try command line option path */
+ pathname = opt_sessiond_path;
+
+ /* Try LTTNG_SESSIOND_PATH env variable */
+ if (pathname == NULL) {
+ pathname = getenv(DEFAULT_SESSIOND_PATH_ENV);
}
- if (traces_path) {
- free(traces_path);
+ /* Try with configured path */
+ if (pathname == NULL) {
+ if (CONFIG_SESSIOND_BIN[0] != '\0') {
+ pathname = CONFIG_SESSIOND_BIN;
+ }
+ }
+
+ /* Try the default path */
+ if (pathname == NULL) {
+ pathname = INSTALL_BIN_PATH "/lttng-sessiond";
+ }
+
+ DBG("Session daemon binary path: %s", pathname);
+
+ /* Check existence and permissions */
+ ret = access(pathname, F_OK | X_OK);
+ if (ret < 0) {
+ ERR("No such file or access denied: %s", pathname);
+ goto end;
+ }
+
+ ret = spawn_sessiond(pathname);
+end:
+ if (ret) {
+ ERR("Problem occurred while launching session daemon (%s)",
+ pathname);
}
return ret;
}
*/
int cmd_create(int argc, const char **argv)
{
- int opt, ret = CMD_SUCCESS;
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
+ char *opt_arg = NULL;
static poptContext pc;
pc = poptGetContext(NULL, argc, argv, long_options, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stdout);
+ SHOW_HELP();
goto end;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
goto end;
+ case OPT_LIVE_TIMER:
+ {
+ unsigned long v;
+
+ errno = 0;
+ opt_arg = poptGetOptArg(pc);
+ if (!opt_arg) {
+ /* Set up default values. */
+ opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER;
+ DBG("Session live timer interval set to default value %d",
+ opt_live_timer);
+ break;
+ }
+
+ v = strtoul(opt_arg, NULL, 0);
+ if (errno != 0 || !isdigit(opt_arg[0])) {
+ ERR("Wrong value in --live parameter: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ if (v != (uint32_t) v) {
+ ERR("32-bit overflow in --live parameter: %s", opt_arg);
+ ret = CMD_ERROR;
+ goto end;
+ }
+ if (v == 0) {
+ ERR("Live timer interval must be greater than zero");
+ ret = CMD_ERROR;
+ goto end;
+ }
+ opt_live_timer = (uint32_t) v;
+ DBG("Session live timer interval set to %d", opt_live_timer);
+ break;
+ }
default:
- usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
+ if (opt_no_consumer) {
+ MSG("The option --no-consumer is obsolete. Use --no-output now.");
+ ret = CMD_WARNING;
+ goto end;
+ }
+
+ /* Spawn a session daemon if needed */
+ if (!opt_no_sessiond) {
+ ret = launch_sessiond();
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
+ /* MI initialization */
+ 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_create);
+ 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;
+ }
+ }
opt_session_name = (char*) poptGetArg(pc);
- ret = create_session();
+ command_ret = create_session();
+
+ if (command_ret) {
+ success = 0;
+ }
+
+ if (lttng_opt_mi) {
+ /* Close output element */
+ ret = mi_lttng_writer_close_element(writer);
+ 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;
+ }
+
+ /* Overwrite ret if an error occurred in create_session() */
+ ret = command_ret ? command_ret : ret;
+
poptFreeContext(pc);
return ret;
}
projects / lttng-tools.git / blobdiff