#include <lttng/channel-internal.h>
#include <lttng/event-internal.h>
#include <lttng/userspace-probe-internal.h>
+#include <lttng/session-internal.h>
+#include <lttng/session-descriptor-internal.h>
#include "filter/filter-ast.h"
#include "filter/filter-parser.h"
LTTNG_HIDDEN
int lttng_check_tracing_group(void)
{
- struct group *grp_tracing; /* no free(). See getgrnam(3) */
- gid_t *grp_list;
+ gid_t *grp_list, tracing_gid;
int grp_list_size, grp_id, i;
int ret = -1;
const char *grp_name = tracing_group;
/* Get GID of group 'tracing' */
- grp_tracing = getgrnam(grp_name);
- if (!grp_tracing) {
+ if (utils_get_group_id(grp_name, false, &tracing_gid)) {
/* If grp_tracing is NULL, the group does not exist. */
goto end;
}
}
for (i = 0; i < grp_list_size; i++) {
- if (grp_list[i] == grp_tracing->gr_gid) {
+ if (grp_list[i] == tracing_gid) {
ret = 1;
break;
}
return ret;
}
+static int check_enough_available_memory(size_t num_bytes_requested_per_cpu)
+{
+ int ret;
+ long num_cpu;
+ size_t best_mem_info;
+ size_t num_bytes_requested_total;
+
+ /*
+ * Get the number of CPU currently online to compute the amount of
+ * memory needed to create a buffer for every CPU.
+ */
+ num_cpu = sysconf(_SC_NPROCESSORS_ONLN);
+ if (num_cpu == -1) {
+ goto error;
+ }
+
+ num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu;
+
+ /*
+ * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most
+ * reliable estimate we can get but it is only exposed by the kernel
+ * since 3.14. (See Linux kernel commit:
+ * 34e431b0ae398fc54ea69ff85ec700722c9da773)
+ */
+ ret = utils_get_memory_available(&best_mem_info);
+ if (ret >= 0) {
+ goto success;
+ }
+
+ /*
+ * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This
+ * is a sanity check for obvious user error.
+ */
+ ret = utils_get_memory_total(&best_mem_info);
+ if (ret >= 0) {
+ goto success;
+ }
+
+error:
+ return -1;
+success:
+ return best_mem_info >= num_bytes_requested_total;
+}
+
/*
* Try connect to session daemon with sock_path.
*
bool send_fd = false;
unsigned int free_filter_expression = 0;
struct filter_parser_ctx *ctx = NULL;
+
+ /*
+ * We have either a filter or some exclusions, so we need to set up
+ * a variable-length memory block from where to send the data.
+ */
+ lttng_dynamic_buffer_init(&send_buffer);
+
/*
* Cast as non-const since we may replace the filter expression
* by a dynamically allocated string. Otherwise, the original
lsm.u.enable.exclusion_count = exclusion_count;
lsm.u.enable.bytecode_len = 0;
- /*
- * We have either a filter or some exclusions, so we need to set up
- * a variable-length memory block from where to send the data.
- */
- lttng_dynamic_buffer_init(&send_buffer);
-
/* Parse filter expression. */
if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL
|| handle->domain.type == LTTNG_DOMAIN_LOG4J
ret = lttng_userspace_probe_location_serialize(
ev_ext->probe_location, &send_buffer,
&fd_to_send);
- if (ret) {
+ if (ret < 0) {
goto mem_error;
}
struct lttng_channel *in_chan)
{
struct lttcomm_session_msg lsm;
+ size_t total_buffer_size_needed_per_cpu = 0;
/* NULL arguments are forbidden. No default values. */
if (handle == NULL || in_chan == NULL) {
memcpy(&lsm.u.channel.extended, extended, sizeof(*extended));
}
+ /*
+ * Verify that the amount of memory required to create the requested
+ * buffer is available on the system at the moment.
+ */
+ total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf *
+ lsm.u.channel.chan.attr.subbuf_size;
+ if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) {
+ return -LTTNG_ERR_NOMEM;
+ }
+
lsm.cmd_type = LTTNG_ENABLE_CHANNEL;
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
return error_get_str(code);
}
+enum lttng_error_code lttng_create_session_ext(
+ struct lttng_session_descriptor *session_descriptor)
+{
+ enum lttng_error_code ret_code;
+ struct lttcomm_session_msg lsm = {
+ .cmd_type = LTTNG_CREATE_SESSION_EXT,
+ };
+ void *reply = NULL;
+ struct lttng_buffer_view reply_view;
+ int reply_ret;
+ bool sessiond_must_generate_ouput;
+ struct lttng_dynamic_buffer payload;
+ int ret;
+ size_t descriptor_size;
+ struct lttng_session_descriptor *descriptor_reply = NULL;
+
+ lttng_dynamic_buffer_init(&payload);
+ if (!session_descriptor) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ sessiond_must_generate_ouput =
+ !lttng_session_descriptor_is_output_destination_initialized(
+ session_descriptor);
+ if (sessiond_must_generate_ouput) {
+ const char *home_dir = utils_get_home_dir();
+ size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0;
+
+ if (!home_dir || home_dir_len > LTTNG_PATH_MAX) {
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len;
+ ret = lttng_dynamic_buffer_append(&payload, home_dir,
+ home_dir_len);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ }
+
+ descriptor_size = payload.size;
+ ret = lttng_session_descriptor_serialize(session_descriptor,
+ &payload);
+ if (ret) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+ descriptor_size = payload.size - descriptor_size;
+ lsm.u.create_session.session_descriptor_size = descriptor_size;
+
+ /* Command returns a session descriptor on success. */
+ reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data,
+ payload.size, &reply);
+ if (reply_ret < 0) {
+ ret_code = -reply_ret;
+ goto end;
+ } else if (reply_ret == 0) {
+ /* Socket unexpectedly closed by the session daemon. */
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ reply_view = lttng_buffer_view_init(reply, 0, reply_ret);
+ ret = lttng_session_descriptor_create_from_buffer(&reply_view,
+ &descriptor_reply);
+ if (ret < 0) {
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
+ }
+ ret_code = LTTNG_OK;
+ lttng_session_descriptor_assign(session_descriptor, descriptor_reply);
+end:
+ free(reply);
+ lttng_dynamic_buffer_reset(&payload);
+ lttng_session_descriptor_destroy(descriptor_reply);
+ return ret_code;
+}
+
/*
- * Create a brand new session using name and url for destination.
+ * Create a new session using name and url for destination.
*
* Returns LTTNG_OK on success or a negative error code.
*/
{
int ret;
ssize_t size;
- struct lttcomm_session_msg lsm;
struct lttng_uri *uris = NULL;
+ struct lttng_session_descriptor *descriptor = NULL;
+ enum lttng_error_code ret_code;
- if (name == NULL) {
- return -LTTNG_ERR_INVALID;
+ if (!name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
- memset(&lsm, 0, sizeof(lsm));
-
- lsm.cmd_type = LTTNG_CREATE_SESSION;
- lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
-
- /* There should never be a data URL */
size = uri_parse_str_urls(url, NULL, &uris);
if (size < 0) {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ switch (size) {
+ case 0:
+ descriptor = lttng_session_descriptor_create(name);
+ break;
+ case 1:
+ if (uris[0].dtype != LTTNG_DST_PATH) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ descriptor = lttng_session_descriptor_local_create(name,
+ uris[0].dst.path);
+ break;
+ case 2:
+ descriptor = lttng_session_descriptor_network_create(name, url,
+ NULL);
+ break;
+ default:
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ if (!descriptor) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
+ ret_code = lttng_create_session_ext(descriptor);
+ ret = ret_code == LTTNG_OK ? 0 : -ret_code;
+end:
+ lttng_session_descriptor_destroy(descriptor);
+ free(uris);
+ return ret;
+}
- lsm.u.uri.size = size;
+/*
+ * Create a session exclusively used for snapshot.
+ *
+ * Returns LTTNG_OK on success or a negative error code.
+ */
+int lttng_create_session_snapshot(const char *name, const char *snapshot_url)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ ssize_t size;
+ struct lttng_uri *uris = NULL;
+ struct lttng_session_descriptor *descriptor = NULL;
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
- sizeof(struct lttng_uri) * size, NULL);
+ if (!name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ size = uri_parse_str_urls(snapshot_url, NULL, &uris);
+ if (size < 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ /*
+ * If the user does not specify a custom subdir, use the session name.
+ */
+ if (size > 0 && uris[0].dtype != LTTNG_DST_PATH &&
+ strlen(uris[0].subdir) == 0) {
+ ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s",
+ name);
+ if (ret < 0) {
+ PERROR("Failed to set session name as network destination sub-directory");
+ ret = -LTTNG_ERR_FATAL;
+ goto end;
+ } else if (ret >= sizeof(uris[0].subdir)) {
+ /* Truncated output. */
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ }
+
+ switch (size) {
+ case 0:
+ descriptor = lttng_session_descriptor_snapshot_create(name);
+ break;
+ case 1:
+ if (uris[0].dtype != LTTNG_DST_PATH) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ descriptor = lttng_session_descriptor_snapshot_local_create(
+ name,
+ uris[0].dst.path);
+ break;
+ case 2:
+ descriptor = lttng_session_descriptor_snapshot_network_create(
+ name,
+ snapshot_url,
+ NULL);
+ break;
+ default:
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ if (!descriptor) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = lttng_create_session_ext(descriptor);
+ ret = ret_code == LTTNG_OK ? 0 : -ret_code;
+end:
+ lttng_session_descriptor_destroy(descriptor);
free(uris);
return ret;
}
+/*
+ * Create a session exclusively used for live.
+ *
+ * Returns LTTNG_OK on success or a negative error code.
+ */
+int lttng_create_session_live(const char *name, const char *url,
+ unsigned int timer_interval)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ struct lttng_session_descriptor *descriptor = NULL;
+
+ if (!name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (url) {
+ descriptor = lttng_session_descriptor_live_network_create(
+ name, url, NULL, timer_interval);
+ } else {
+ descriptor = lttng_session_descriptor_live_create(
+ name, timer_interval);
+ }
+ if (!descriptor) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ ret_code = lttng_create_session_ext(descriptor);
+ ret = ret_code == LTTNG_OK ? 0 : -ret_code;
+end:
+ lttng_session_descriptor_destroy(descriptor);
+ return ret;
+}
+
/*
* Destroy session using name.
* Returns size of returned session payload data or a negative error code.
* Returns the number of lttng_session entries in sessions;
* on error, returns a negative value.
*/
-int lttng_list_sessions(struct lttng_session **sessions)
+int lttng_list_sessions(struct lttng_session **out_sessions)
{
int ret;
struct lttcomm_session_msg lsm;
+ const size_t session_size = sizeof(struct lttng_session) +
+ sizeof(struct lttng_session_extended);
+ size_t session_count, i;
+ struct lttng_session_extended *sessions_extended_begin;
+ struct lttng_session *sessions = NULL;
memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_SESSIONS;
- ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
- if (ret < 0) {
- return ret;
+ ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions);
+ if (ret <= 0) {
+ ret = ret == 0 ? -LTTNG_ERR_FATAL : ret;
+ goto end;
+ }
+ if (!sessions) {
+ ret = -LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ if (ret % session_size) {
+ ret = -LTTNG_ERR_UNK;
+ free(sessions);
+ *out_sessions = NULL;
+ goto end;
+ }
+ session_count = (size_t) ret / session_size;
+ sessions_extended_begin = (struct lttng_session_extended *)
+ (&sessions[session_count]);
+
+ /* Set extended session info pointers. */
+ for (i = 0; i < session_count; i++) {
+ struct lttng_session *session = &sessions[i];
+ struct lttng_session_extended *extended =
+ &(sessions_extended_begin[i]);
+
+ session->extended.ptr = extended;
+ }
+
+ ret = (int) session_count;
+ *out_sessions = sessions;
+end:
+ return ret;
+}
+
+enum lttng_error_code lttng_session_get_creation_time(
+ const struct lttng_session *session, uint64_t *creation_time)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+ struct lttng_session_extended *extended;
+
+ if (!session || !creation_time || !session->extended.ptr) {
+ ret = LTTNG_ERR_INVALID;
+ goto end;
}
- return ret / sizeof(struct lttng_session);
+ extended = session->extended.ptr;
+ if (!extended->creation_time.is_set) {
+ /* Not created on the session daemon yet. */
+ ret = LTTNG_ERR_SESSION_NOT_EXIST;
+ goto end;
+ }
+ *creation_time = extended->creation_time.value;
+end:
+ return ret;
}
int lttng_set_session_shm_path(const char *session_name,
size_t cmd_header_len;
uint32_t nb_events, i;
void *comm_ext_at;
- void *listing_at;
char *reception_buffer = NULL;
- char *listing = NULL;
+ struct lttng_dynamic_buffer listing;
size_t storage_req;
/* Safety check. An handle and channel name are mandatory */
goto end;
}
+ if (!cmd_header) {
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
/* Set number of events and free command header */
nb_events = cmd_header->nb_events;
if (nb_events > INT_MAX) {
* The buffer that is returned must contain a "flat" version of
* the events that are returned. In other words, all pointers
* within an lttng_event must point to a location within the returned
- * buffer so that the user may free by simply calling free() on the
- * returned buffer. This is needed in order to maintain API
+ * buffer so that the user may free everything by simply calling free()
+ * on the returned buffer. This is needed in order to maintain API
* compatibility.
*
- * A first pass is performed to figure the size of the buffer that
- * must be returned. A second pass is then performed to setup
+ * A first pass is performed to compute the size of the buffer that
+ * must be allocated. A second pass is then performed to setup
* the returned events so that their members always point within the
* buffer.
*
for (i = 0; i < nb_events; i++) {
struct lttcomm_event_extended_header *ext_comm =
(struct lttcomm_event_extended_header *) comm_ext_at;
+ int probe_storage_req = 0;
comm_ext_at += sizeof(*ext_comm);
comm_ext_at += ext_comm->filter_len;
comm_ext_at +=
ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
+ if (ext_comm->userspace_probe_location_len) {
+ struct lttng_userspace_probe_location *probe_location = NULL;
+ struct lttng_buffer_view probe_location_view;
+
+ probe_location_view = lttng_buffer_view_init(
+ comm_ext_at, 0,
+ ext_comm->userspace_probe_location_len);
+
+ /*
+ * Create a temporary userspace probe location to
+ * determine the size needed by a "flattened" version
+ * of that same probe location.
+ */
+ ret = lttng_userspace_probe_location_create_from_buffer(
+ &probe_location_view, &probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto end;
+ }
+
+ ret = lttng_userspace_probe_location_flatten(
+ probe_location, NULL);
+ lttng_userspace_probe_location_destroy(probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto end;
+ }
+
+ probe_storage_req = ret;
+ comm_ext_at += ext_comm->userspace_probe_location_len;
+ }
+
storage_req += sizeof(struct lttng_event_extended);
- /* TODO: missing size of flat userspace probe. */
storage_req += ext_comm->filter_len;
storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
- storage_req += storage_req % 8;
+ /* Padding to ensure the flat probe is aligned. */
+ storage_req = ALIGN_TO(storage_req, sizeof(uint64_t));
+ storage_req += probe_storage_req;
}
- listing = zmalloc(storage_req);
- if (!listing) {
+ lttng_dynamic_buffer_init(&listing);
+ /*
+ * We must ensure that "listing" is never resized so as to preserve
+ * the validity of the flattened objects.
+ */
+ ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req);
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
goto end;
}
- memcpy(listing, reception_buffer,
- nb_events * sizeof(struct lttng_event));
+
+ ret = lttng_dynamic_buffer_append(&listing, reception_buffer,
+ nb_events * sizeof(struct lttng_event));
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto free_dynamic_buffer;
+ }
comm_ext_at = reception_buffer +
- (nb_events * sizeof(struct lttng_event));
- listing_at = listing +
- (nb_events * sizeof(struct lttng_event));
+ (nb_events * sizeof(struct lttng_event));
for (i = 0; i < nb_events; i++) {
struct lttng_event *event = (struct lttng_event *)
- (listing + (sizeof(struct lttng_event) * i));
+ (listing.data + (sizeof(struct lttng_event) * i));
struct lttcomm_event_extended_header *ext_comm =
(struct lttcomm_event_extended_header *) comm_ext_at;
struct lttng_event_extended *event_extended =
- (struct lttng_event_extended *) listing_at;
+ (struct lttng_event_extended *)
+ (listing.data + listing.size);
+ /* Insert struct lttng_event_extended. */
+ ret = lttng_dynamic_buffer_set_size(&listing,
+ listing.size + sizeof(*event_extended));
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto free_dynamic_buffer;
+ }
event->extended.ptr = event_extended;
- listing_at += sizeof(*event_extended);
+
comm_ext_at += sizeof(*ext_comm);
- /* Copy filter expression. */
- memcpy(listing_at, comm_ext_at, ext_comm->filter_len);
- event_extended->filter_expression = listing_at;
- comm_ext_at += ext_comm->filter_len;
- listing_at += ext_comm->filter_len;
+ /* Insert filter expression. */
+ if (ext_comm->filter_len) {
+ event_extended->filter_expression = listing.data +
+ listing.size;
+ ret = lttng_dynamic_buffer_append(&listing, comm_ext_at,
+ ext_comm->filter_len);
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto free_dynamic_buffer;
+ }
+ comm_ext_at += ext_comm->filter_len;
+ }
+
+ /* Insert exclusions. */
+ if (ext_comm->nb_exclusions) {
+ event_extended->exclusions.count =
+ ext_comm->nb_exclusions;
+ event_extended->exclusions.strings =
+ listing.data + listing.size;
+
+ ret = lttng_dynamic_buffer_append(&listing,
+ comm_ext_at,
+ ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN);
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto free_dynamic_buffer;
+ }
+ comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
+ }
+
+ /* Insert padding to align to 64-bits. */
+ ret = lttng_dynamic_buffer_set_size(&listing,
+ ALIGN_TO(listing.size, sizeof(uint64_t)));
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto free_dynamic_buffer;
+ }
+
+ /* Insert flattened userspace probe location. */
+ if (ext_comm->userspace_probe_location_len) {
+ struct lttng_userspace_probe_location *probe_location = NULL;
+ struct lttng_buffer_view probe_location_view;
+
+ probe_location_view = lttng_buffer_view_init(
+ comm_ext_at, 0,
+ ext_comm->userspace_probe_location_len);
+
+ ret = lttng_userspace_probe_location_create_from_buffer(
+ &probe_location_view, &probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto free_dynamic_buffer;
+ }
- /* Copy exclusions. */
- event_extended->exclusions.count = ext_comm->nb_exclusions;
- event_extended->exclusions.strings = listing_at;
- memcpy(listing_at, comm_ext_at,
- ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN);
- listing_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
- comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
+ event_extended->probe_location = (struct lttng_userspace_probe_location *)
+ (listing.data + listing.size);
+ ret = lttng_userspace_probe_location_flatten(
+ probe_location, &listing);
+ lttng_userspace_probe_location_destroy(probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto free_dynamic_buffer;
+ }
- listing_at += ((uintptr_t) listing_at) % 8;
+ comm_ext_at += ext_comm->userspace_probe_location_len;
+ }
}
- *events = (struct lttng_event *) listing;
- listing = NULL;
+ /* Don't reset listing buffer as we return its content. */
+ *events = (struct lttng_event *) listing.data;
+ lttng_dynamic_buffer_init(&listing);
ret = (int) nb_events;
+free_dynamic_buffer:
+ lttng_dynamic_buffer_reset(&listing);
end:
free(cmd_header);
free(reception_buffer);
- free(listing);
return ret;
}
}
/*
- * This is an extension of create session that is ONLY and SHOULD only be used
- * by the lttng command line program. It exists to avoid using URI parsing in
- * the lttng client.
- *
- * We need the date and time for the trace path subdirectory for the case where
- * the user does NOT define one using either -o or -U. Using the normal
- * lttng_create_session API call, we have no clue on the session daemon side if
- * the URL was generated automatically by the client or define by the user.
- *
- * So this function "wrapper" is hidden from the public API, takes the datetime
- * string and appends it if necessary to the URI subdirectory before sending it
- * to the session daemon.
- *
- * With this extra function, the lttng_create_session call behavior is not
- * changed and the timestamp is appended to the URI on the session daemon side
- * if necessary.
+ * [OBSOLETE]
*/
int _lttng_create_session_ext(const char *name, const char *url,
const char *datetime)
{
- int ret;
- ssize_t size;
- struct lttcomm_session_msg lsm;
- struct lttng_uri *uris = NULL;
-
- if (name == NULL || datetime == NULL) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
-
- lsm.cmd_type = LTTNG_CREATE_SESSION;
- lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
-
- /* There should never be a data URL. */
- size = uri_parse_str_urls(url, NULL, &uris);
- if (size < 0) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- lsm.u.uri.size = size;
-
- if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) {
- /* Don't append datetime if the name was automatically created. */
- if (strncmp(name, DEFAULT_SESSION_NAME "-",
- strlen(DEFAULT_SESSION_NAME) + 1)) {
- ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s",
- name, datetime);
- } else {
- ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name);
- }
- if (ret < 0) {
- PERROR("snprintf uri subdir");
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- }
-
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
- sizeof(struct lttng_uri) * size, NULL);
-
-error:
- free(uris);
- return ret;
+ return -ENOSYS;
}
/*
return ret;
}
-/*
- * Create a session exclusively used for snapshot.
- *
- * Returns LTTNG_OK on success or a negative error code.
- */
-int lttng_create_session_snapshot(const char *name, const char *snapshot_url)
-{
- int ret;
- ssize_t size;
- struct lttcomm_session_msg lsm;
- struct lttng_uri *uris = NULL;
-
- if (name == NULL) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
-
- lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT;
- lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
-
- size = uri_parse_str_urls(snapshot_url, NULL, &uris);
- if (size < 0) {
- return -LTTNG_ERR_INVALID;
- }
-
- lsm.u.uri.size = size;
-
- /*
- * If the user does not specify a custom subdir, use the session name.
- */
- if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) {
- ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name);
- if (ret < 0) {
- PERROR("snprintf uri subdir");
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- }
-
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
- sizeof(struct lttng_uri) * size, NULL);
-
-error:
- free(uris);
- return ret;
-}
-
-/*
- * Create a session exclusively used for live.
- *
- * Returns LTTNG_OK on success or a negative error code.
- */
-int lttng_create_session_live(const char *name, const char *url,
- unsigned int timer_interval)
-{
- int ret;
- ssize_t size;
- struct lttcomm_session_msg lsm;
- struct lttng_uri *uris = NULL;
-
- if (name == NULL || timer_interval == 0) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
-
- lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
- lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
-
- if (url) {
- size = uri_parse_str_urls(url, NULL, &uris);
- if (size <= 0) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* file:// is not accepted for live session. */
- if (uris[0].dtype == LTTNG_DST_PATH) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
- } else {
- size = 0;
- }
-
- lsm.u.session_live.nb_uri = size;
- lsm.u.session_live.timer_interval = timer_interval;
-
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
- sizeof(struct lttng_uri) * size, NULL);
-
-end:
- free(uris);
- return ret;
-}
-
/*
* List PIDs in the tracker.
*
int enabled = 1;
struct lttcomm_session_msg lsm;
size_t nr_pids;
- int32_t *pids;
+ int32_t *pids = NULL;
if (handle == NULL) {
return -LTTNG_ERR_INVALID;
return ret;
}
nr_pids = ret / sizeof(int32_t);
+ if (nr_pids > 0 && !pids) {
+ return -LTTNG_ERR_UNK;
+ }
if (nr_pids == 1 && pids[0] == -1) {
free(pids);
pids = NULL;
return ret;
}
-int lttng_session_get_current_archive_location(const char *session_name,
- char **chunk_path)
-{
- struct lttcomm_session_msg lsm;
- struct lttng_session_get_current_output_return *output_return = NULL;
- int ret;
- size_t path_len;
-
- memset(&lsm, 0, sizeof(lsm));
- lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT;
- ret = lttng_strncpy(lsm.session.name, session_name,
- sizeof(lsm.session.name));
- if (ret) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return);
- if (ret < 0) {
- ret = -1;
- goto end;
- }
-
- path_len = lttng_strnlen(output_return->path,
- sizeof(output_return->path));
- if (path_len == 0 || path_len == sizeof(output_return->path)) {
- ret = -LTTNG_ERR_NO_SESSION_OUTPUT;
- goto end;
- }
-
- *chunk_path = zmalloc(path_len + 1);
- if (!*chunk_path) {
- ret = -1;
- goto end;
- }
- memcpy(*chunk_path, output_return->path, path_len);
-
- ret = 0;
-
-end:
- free(output_return);
- return ret;
-}
-
/*
* lib constructor.
*/
projects / lttng-tools.git / blobdiff