* Linux Trace Toolkit Control Library
*
* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: LGPL-2.1-only
*
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _LGPL_SOURCE
#include <common/common.h>
#include <common/compat/string.h>
#include <common/defaults.h>
+#include <common/dynamic-buffer.h>
+#include <common/dynamic-array.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/tracker.h>
+#include <common/unix.h>
#include <common/uri.h>
#include <common/utils.h>
-#include <common/dynamic-buffer.h>
-#include <lttng/lttng.h>
-#include <lttng/health-internal.h>
-#include <lttng/trigger/trigger-internal.h>
-#include <lttng/endpoint.h>
#include <lttng/channel-internal.h>
+#include <lttng/destruction-handle.h>
+#include <lttng/endpoint.h>
#include <lttng/event-internal.h>
-#include <lttng/userspace-probe-internal.h>
-#include <lttng/session-internal.h>
+#include <lttng/health-internal.h>
+#include <lttng/lttng.h>
#include <lttng/session-descriptor-internal.h>
-#include <lttng/destruction-handle.h>
-#include <lttng/tracker-internal.h>
+#include <lttng/session-internal.h>
+#include <lttng/trigger/trigger-internal.h>
+#include <lttng/userspace-probe-internal.h>
+#include <lttng/lttng-error.h>
#include "filter/filter-ast.h"
#include "filter/filter-parser.h"
* Receive data from the sessiond socket.
*
* On success, returns the number of bytes received (>=0)
- * On error, returns -1 (recvmsg() error) or -ENOTCONN
+ * On error, returns a negative lttng_error_code.
*/
static int recv_data_sessiond(void *buf, size_t len)
{
return ret;
}
+/*
+ * Receive a payload from the session daemon by appending to an existing
+ * payload.
+ * On success, returns the number of bytes received (>=0)
+ * On error, returns a negative lttng_error_code.
+ */
+static int recv_payload_sessiond(struct lttng_payload *payload, size_t len)
+{
+ int ret;
+ const size_t original_payload_size = payload->buffer.size;
+
+ ret = lttng_dynamic_buffer_set_size(
+ &payload->buffer, payload->buffer.size + len);
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ ret = recv_data_sessiond(
+ payload->buffer.data + original_payload_size, len);
+end:
+ return ret;
+}
+
/*
* Check if we are in the specified group.
*
connected = 1;
}
- /* Send command to session daemon */
ret = send_session_msg(lsm);
if (ret < 0) {
/* Ret value is a valid lttng error code. */
return ret;
}
+LTTNG_HIDDEN
+int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message,
+ struct lttng_payload *reply)
+{
+ int ret;
+ struct lttcomm_lttng_msg llm;
+ const int fd_count = lttng_payload_view_get_fd_handle_count(message);
+
+ assert(reply->buffer.size == 0);
+ assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0);
+
+ ret = connect_sessiond();
+ if (ret < 0) {
+ ret = -LTTNG_ERR_NO_SESSIOND;
+ goto end;
+ } else {
+ sessiond_socket = ret;
+ connected = 1;
+ }
+
+ /* Send command to session daemon */
+ ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data,
+ message->buffer.size);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ if (fd_count > 0) {
+ ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket,
+ message);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_FATAL;
+ goto end;
+ }
+ }
+
+ /* Get header from data transmission */
+ ret = recv_payload_sessiond(reply, sizeof(llm));
+ if (ret < 0) {
+ /* Ret value is a valid lttng error code. */
+ goto end;
+ }
+
+ llm = *((typeof(llm) *) reply->buffer.data);
+
+ /* Check error code if OK */
+ if (llm.ret_code != LTTNG_OK) {
+ ret = -llm.ret_code;
+ goto end;
+ }
+
+ if (llm.cmd_header_size > 0) {
+ ret = recv_payload_sessiond(reply, llm.cmd_header_size);
+ if (ret < 0) {
+ goto end;
+ }
+ }
+
+ /* Get command header from data transmission */
+ if (llm.data_size > 0) {
+ ret = recv_payload_sessiond(reply, llm.data_size);
+ if (ret < 0) {
+ goto end;
+ }
+ }
+
+ if (llm.fd_count > 0) {
+ ret = lttcomm_recv_payload_fds_unix_sock(
+ sessiond_socket, llm.fd_count, reply);
+ if (ret < 0) {
+ goto end;
+ }
+ }
+
+ /* Don't return the llm header to the caller. */
+ memmove(reply->buffer.data, reply->buffer.data + sizeof(llm),
+ reply->buffer.size - sizeof(llm));
+ ret = lttng_dynamic_buffer_set_size(
+ &reply->buffer, reply->buffer.size - sizeof(llm));
+ if (ret) {
+ /* Can't happen as size is reduced. */
+ abort();
+ }
+
+ ret = reply->buffer.size;
+
+end:
+ disconnect_sessiond();
+ return ret;
+}
+
/*
* Create lttng handle and return pointer.
*
/* Add loglevel filtering if any for the JUL domain. */
if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
- char *op;
+ const char *op;
if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
op = ">=";
int exclusion_count, char **exclusion_list)
{
struct lttcomm_session_msg lsm;
- struct lttng_dynamic_buffer send_buffer;
- int ret = 0, i, fd_to_send = -1;
- bool send_fd = false;
+ struct lttng_payload payload;
+ int ret = 0, i;
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.
+ * a variable-length payload from where to send the data.
*/
- lttng_dynamic_buffer_init(&send_buffer);
+ lttng_payload_init(&payload);
/*
* Cast as non-const since we may replace the filter expression
}
}
- ret = lttng_dynamic_buffer_set_capacity(&send_buffer,
- lsm.u.enable.bytecode_len
- + lsm.u.enable.expression_len
- + LTTNG_SYMBOL_NAME_LEN * exclusion_count);
+ ret = lttng_dynamic_buffer_set_capacity(&payload.buffer,
+ lsm.u.enable.bytecode_len +
+ lsm.u.enable.expression_len +
+ LTTNG_SYMBOL_NAME_LEN *
+ exclusion_count);
if (ret) {
ret = -LTTNG_ERR_EXCLUSION_NOMEM;
goto mem_error;
goto mem_error;
}
- ret = lttng_dynamic_buffer_append(&send_buffer,
- *(exclusion_list + i),
- LTTNG_SYMBOL_NAME_LEN);
+ ret = lttng_dynamic_buffer_append(&payload.buffer,
+ *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN);
if (ret) {
goto mem_error;
}
/* Add filter expression next. */
if (filter_expression) {
- ret = lttng_dynamic_buffer_append(&send_buffer,
+ ret = lttng_dynamic_buffer_append(&payload.buffer,
filter_expression, lsm.u.enable.expression_len);
if (ret) {
goto mem_error;
}
/* Add filter bytecode next. */
if (ctx && lsm.u.enable.bytecode_len != 0) {
- ret = lttng_dynamic_buffer_append(&send_buffer,
+ ret = lttng_dynamic_buffer_append(&payload.buffer,
&ctx->bytecode->b, lsm.u.enable.bytecode_len);
if (ret) {
goto mem_error;
* number of bytes that was appended to the buffer.
*/
ret = lttng_userspace_probe_location_serialize(
- ev_ext->probe_location, &send_buffer,
- &fd_to_send);
+ ev_ext->probe_location, &payload);
if (ret < 0) {
goto mem_error;
}
- send_fd = fd_to_send >= 0;
/*
* Set the size of the userspace probe location element
* of the buffer so that the receiving side knows where
}
}
- ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm,
- send_fd ? &fd_to_send : NULL,
- send_fd ? 1 : 0,
- send_buffer.size ? send_buffer.data : NULL,
- send_buffer.size, NULL, NULL, 0);
+ {
+ struct lttng_payload_view view = lttng_payload_view_from_payload(
+ &payload, 0, -1);
+ int fd_count = lttng_payload_view_get_fd_handle_count(&view);
+ int fd_to_send;
+
+ if (fd_count < 0) {
+ goto mem_error;
+ }
+
+ assert(fd_count == 0 || fd_count == 1);
+ if (fd_count == 1) {
+ struct fd_handle *handle =
+ lttng_payload_view_pop_fd_handle(&view);
+
+ if (!handle) {
+ goto mem_error;
+ }
+
+ fd_to_send = fd_handle_get_fd(handle);
+ fd_handle_put(handle);
+ }
+
+ ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm,
+ fd_count ? &fd_to_send : NULL, fd_count,
+ view.buffer.size ? view.buffer.data : NULL,
+ view.buffer.size, NULL, NULL, 0);
+ }
mem_error:
if (filter_expression && ctx) {
* Return directly to the caller and don't ask the sessiond since
* something went wrong in the parsing of data above.
*/
- lttng_dynamic_buffer_reset(&send_buffer);
+ lttng_payload_reset(&payload);
return ret;
ask_sessiond:
const char *channel_name, struct lttng_event **events)
{
int ret;
- struct lttcomm_session_msg lsm;
- struct lttcomm_event_command_header *cmd_header = NULL;
- size_t cmd_header_len;
+ struct lttcomm_session_msg lsm = {};
+ const struct lttcomm_event_command_header *cmd_header = NULL;
uint32_t nb_events, i;
- void *comm_ext_at;
- char *reception_buffer = NULL;
+ const void *comm_ext_at;
struct lttng_dynamic_buffer listing;
size_t storage_req;
+ struct lttng_payload payload;
+ struct lttng_payload payload_copy;
+ struct lttng_payload_view lsm_view =
+ lttng_payload_view_init_from_buffer(
+ (const char *) &lsm, 0, sizeof(lsm));
+ struct lttng_buffer_view cmd_header_view;
+ struct lttng_buffer_view cmd_payload_view;
+ struct lttng_buffer_view flat_events_view;
+ struct lttng_buffer_view ext_view;
/* Safety check. An handle and channel name are mandatory */
if (handle == NULL || channel_name == NULL) {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
- memset(&lsm, 0, sizeof(lsm));
+ lttng_payload_init(&payload);
+ lttng_payload_init(&payload_copy);
+
lsm.cmd_type = LTTNG_LIST_EVENTS;
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
sizeof(lsm.u.list.channel_name));
COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
- ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0,
- (void **) &reception_buffer, (void **) &cmd_header,
- &cmd_header_len);
+ ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload);
if (ret < 0) {
goto end;
}
- if (!cmd_header) {
- ret = -LTTNG_ERR_UNK;
+ /*
+ * A copy of the payload is performed since it will be
+ * consumed twice. Consuming the same payload twice is invalid since
+ * it will cause any received file descriptor to become "shared"
+ * between different instances of the resulting objects.
+ */
+ ret = lttng_payload_copy(&payload, &payload_copy);
+ if (ret) {
+ ret = -LTTNG_ERR_NOMEM;
goto end;
}
+ cmd_header_view = lttng_buffer_view_from_dynamic_buffer(
+ &payload.buffer, 0, sizeof(*cmd_header));
+ if (!cmd_header_view.data) {
+ ret = -LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+
+ cmd_header = (typeof(cmd_header)) cmd_header_view.data;
+
/* Set number of events and free command header */
nb_events = cmd_header->nb_events;
if (nb_events > INT_MAX) {
ret = -LTTNG_ERR_OVERFLOW;
goto end;
}
- free(cmd_header);
- cmd_header = NULL;
+
+ cmd_payload_view = lttng_buffer_view_from_dynamic_buffer(
+ &payload.buffer, sizeof(*cmd_header), -1);
/*
* The buffer that is returned must contain a "flat" version of
* - exclusions
* - padding to align to 64-bits
*/
- comm_ext_at = reception_buffer +
- (nb_events * sizeof(struct lttng_event));
+ ext_view = lttng_buffer_view_from_view(&cmd_payload_view,
+ nb_events * sizeof(struct lttng_event), -1);
+ comm_ext_at = ext_view.data;
storage_req = nb_events * sizeof(struct lttng_event);
+ {
+ struct lttng_payload_view payload_view =
+ lttng_payload_view_from_payload(&payload, 0, -1);
- 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;
+ for (i = 0; i < nb_events; i++) {
+ const struct lttcomm_event_extended_header *ext_comm =
+ (struct lttcomm_event_extended_header *)
+ comm_ext_at;
+ int probe_storage_req = 0;
- if (ext_comm->userspace_probe_location_len) {
- struct lttng_userspace_probe_location *probe_location = NULL;
- struct lttng_buffer_view probe_location_view;
+ 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_payload_view probe_location_view = lttng_payload_view_from_view(
+ &payload_view,
+ (const char *) comm_ext_at -
+ payload_view.buffer.data,
+ ext_comm->userspace_probe_location_len);
- 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_payload(
+ &probe_location_view,
+ &probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto end;
+ }
- /*
- * 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;
+ }
- 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;
}
- probe_storage_req = ret;
- comm_ext_at += ext_comm->userspace_probe_location_len;
+ storage_req += sizeof(struct lttng_event_extended);
+ storage_req += ext_comm->filter_len;
+ storage_req += ext_comm->nb_exclusions *
+ LTTNG_SYMBOL_NAME_LEN;
+ /* Padding to ensure the flat probe is aligned. */
+ storage_req = ALIGN_TO(storage_req, sizeof(uint64_t));
+ storage_req += probe_storage_req;
}
-
- storage_req += sizeof(struct lttng_event_extended);
- storage_req += ext_comm->filter_len;
- storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
- /* Padding to ensure the flat probe is aligned. */
- storage_req = ALIGN_TO(storage_req, sizeof(uint64_t));
- storage_req += probe_storage_req;
}
lttng_dynamic_buffer_init(&listing);
goto end;
}
- ret = lttng_dynamic_buffer_append(&listing, reception_buffer,
+ cmd_payload_view = lttng_buffer_view_from_dynamic_buffer(
+ &payload_copy.buffer, sizeof(*cmd_header), -1);
+ flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0,
nb_events * sizeof(struct lttng_event));
+ ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view);
if (ret) {
ret = -LTTNG_ERR_NOMEM;
goto free_dynamic_buffer;
}
- comm_ext_at = reception_buffer +
- (nb_events * sizeof(struct lttng_event));
- for (i = 0; i < nb_events; i++) {
- struct lttng_event *event = (struct lttng_event *)
- (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.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;
-
- comm_ext_at += sizeof(*ext_comm);
-
- /* 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);
+ ext_view = lttng_buffer_view_from_view(&cmd_payload_view,
+ nb_events * sizeof(struct lttng_event), -1);
+ comm_ext_at = ext_view.data;
+
+ {
+ struct lttng_payload_view payload_copy_view =
+ lttng_payload_view_from_payload(
+ &payload_copy, 0, -1);
+
+ for (i = 0; i < nb_events; i++) {
+ struct lttng_event *event = (typeof(event))(
+ listing.data +
+ (sizeof(struct lttng_event) * i));
+ const struct lttcomm_event_extended_header *ext_comm =
+ (typeof(ext_comm)) comm_ext_at;
+ struct lttng_event_extended *event_extended =
+ (typeof(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;
}
- comm_ext_at += ext_comm->filter_len;
- }
+ event->extended.ptr = event_extended;
+
+ comm_ext_at += sizeof(*ext_comm);
+
+ /* 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;
+ /* 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;
+ }
- ret = lttng_dynamic_buffer_append(&listing,
- 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;
}
- 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);
+ /* Insert flattened userspace probe location. */
+ if (ext_comm->userspace_probe_location_len) {
+ struct lttng_userspace_probe_location
+ *probe_location = NULL;
+ struct lttng_payload_view probe_location_view = lttng_payload_view_from_view(
+ &payload_copy_view,
+ (const char *) comm_ext_at -
+ payload_copy_view.buffer.data,
+ ext_comm->userspace_probe_location_len);
+
+ ret = lttng_userspace_probe_location_create_from_payload(
+ &probe_location_view,
+ &probe_location);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto free_dynamic_buffer;
+ }
- 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;
- }
+ 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;
+ }
- 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;
+ comm_ext_at += ext_comm->userspace_probe_location_len;
}
-
- comm_ext_at += ext_comm->userspace_probe_location_len;
}
}
free_dynamic_buffer:
lttng_dynamic_buffer_reset(&listing);
end:
- free(cmd_header);
- free(reception_buffer);
+ lttng_payload_reset(&payload);
+ lttng_payload_reset(&payload_copy);
return ret;
}
return ret;
}
-/*
- * List IDs in the tracker.
- *
- * tracker_type is the type of tracker.
- * ids is set to an allocated array of IDs currently tracked. On
- * success, ids and contained ids must be freed/destroy by the caller.
- * nr_ids is set to the number of entries contained by the ids array.
- *
- * Returns 0 on success, else a negative LTTng error code.
- */
-int lttng_list_tracker_ids(struct lttng_handle *handle,
- enum lttng_tracker_type tracker_type,
- struct lttng_tracker_ids **_ids)
-{
- int ret, i;
- struct lttcomm_session_msg lsm;
- struct lttcomm_tracker_command_header *cmd_header = NULL;
- char *cmd_payload = NULL, *p;
- size_t cmd_header_len;
- size_t nr_ids = 0;
- struct lttng_tracker_ids *ids = NULL;
-
- if (handle == NULL) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
- lsm.cmd_type = LTTNG_LIST_TRACKER_IDS;
- lsm.u.id_tracker_list.tracker_type = tracker_type;
- lttng_ctl_copy_string(lsm.session.name, handle->session_name,
- sizeof(lsm.session.name));
- COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
-
- ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0,
- (void **) &cmd_payload, (void **) &cmd_header,
- &cmd_header_len);
- if (ret < 0) {
- goto error;
- }
-
- /* Set number of tracker_id and free command header */
- nr_ids = cmd_header->nb_tracker_id;
- if (nr_ids > INT_MAX) {
- ret = -LTTNG_ERR_OVERFLOW;
- goto error;
- }
- free(cmd_header);
- cmd_header = NULL;
-
- ids = lttng_tracker_ids_create(nr_ids);
- if (!ids) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- p = cmd_payload;
- for (i = 0; i < nr_ids; i++) {
- struct lttcomm_tracker_id_header *tracker_id;
- struct lttng_tracker_id *id;
- enum lttng_tracker_id_status status;
-
- tracker_id = (struct lttcomm_tracker_id_header *) p;
- p += sizeof(struct lttcomm_tracker_id_header);
- id = lttng_tracker_ids_get_pointer_of_index(ids, i);
- if (!id) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- switch (tracker_id->type) {
- case LTTNG_ID_ALL:
- status = lttng_tracker_id_set_all(id);
- break;
- case LTTNG_ID_VALUE:
- id->value = tracker_id->u.value;
- status = lttng_tracker_id_set_value(
- id, tracker_id->u.value);
- break;
- case LTTNG_ID_STRING:
- status = lttng_tracker_id_set_string(id, p);
- p += tracker_id->u.var_data_len;
- break;
- default:
- goto error;
- }
-
- if (status != LTTNG_TRACKER_ID_STATUS_OK) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
- }
- free(cmd_payload);
- *_ids = ids;
- return 0;
-
-error:
- lttng_tracker_ids_destroy(ids);
- free(cmd_payload);
- free(cmd_header);
- return ret;
-}
-
-/*
- * List PIDs in the tracker.
- *
- * enabled is set to whether the PID tracker is enabled.
- * pids is set to an allocated array of PIDs currently tracked. On
- * success, pids must be freed by the caller.
- * nr_pids is set to the number of entries contained by the pids array.
- *
- * Returns 0 on success, else a negative LTTng error code.
- */
-int lttng_list_tracker_pids(struct lttng_handle *handle,
- int *_enabled, int32_t **_pids, size_t *_nr_pids)
-{
- struct lttng_tracker_ids *ids = NULL;
- unsigned int nr_ids = 0;
- int *pids = NULL;
- int ret = 0, i;
- enum lttng_tracker_id_status status;
- const struct lttng_tracker_id *id;
-
- ret = lttng_list_tracker_ids(handle, LTTNG_TRACKER_PID, &ids);
- if (ret < 0) {
- return ret;
- }
-
- status = lttng_tracker_ids_get_count(ids, &nr_ids);
- if (status != LTTNG_TRACKER_ID_STATUS_OK) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- if (nr_ids == 1) {
- id = lttng_tracker_ids_get_at_index(ids, 0);
- if (id && lttng_tracker_id_get_type(id) == LTTNG_ID_ALL) {
- *_enabled = 0;
- goto end;
- }
- }
-
- *_enabled = 1;
-
- pids = zmalloc(nr_ids * sizeof(*pids));
- if (!pids) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- for (i = 0; i < nr_ids; i++) {
- id = lttng_tracker_ids_get_at_index(ids, i);
- status = lttng_tracker_id_get_value(id, &pids[i]);
- if (status != LTTNG_TRACKER_ID_STATUS_OK) {
- ret = -LTTNG_ERR_UNK;
- goto end;
- }
- }
- *_pids = pids;
- *_nr_pids = nr_ids;
-end:
- lttng_tracker_ids_destroy(ids);
- if (ret < 0) {
- free(pids);
- }
- return ret;
-}
-
/*
* Regenerate the metadata for a session.
* Return 0 on success, a negative error code on error.
{
int ret;
struct lttcomm_session_msg lsm;
- struct lttng_dynamic_buffer buffer;
+ struct lttng_payload payload;
- lttng_dynamic_buffer_init(&buffer);
+ lttng_payload_init(&payload);
if (!trigger) {
ret = -LTTNG_ERR_INVALID;
goto end;
goto end;
}
- ret = lttng_trigger_serialize(trigger, &buffer);
+ ret = lttng_trigger_serialize(trigger, &payload);
if (ret < 0) {
ret = -LTTNG_ERR_UNK;
goto end;
memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_REGISTER_TRIGGER;
- lsm.u.trigger.length = (uint32_t) buffer.size;
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data,
- buffer.size, NULL);
+ lsm.u.trigger.length = (uint32_t) payload.buffer.size;
+ ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(
+ &lsm, payload.buffer.data, payload.buffer.size, NULL);
end:
- lttng_dynamic_buffer_reset(&buffer);
+ lttng_payload_reset(&payload);
return ret;
}
{
int ret;
struct lttcomm_session_msg lsm;
- struct lttng_dynamic_buffer buffer;
+ struct lttng_payload payload;
- lttng_dynamic_buffer_init(&buffer);
+ lttng_payload_init(&payload);
if (!trigger) {
ret = -LTTNG_ERR_INVALID;
goto end;
goto end;
}
- ret = lttng_trigger_serialize(trigger, &buffer);
+ ret = lttng_trigger_serialize(trigger, &payload);
if (ret < 0) {
ret = -LTTNG_ERR_UNK;
goto end;
memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER;
- lsm.u.trigger.length = (uint32_t) buffer.size;
- ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data,
- buffer.size, NULL);
-end:
- lttng_dynamic_buffer_reset(&buffer);
- return ret;
-}
-
-static int lttng_track_untrack_id(struct lttng_handle *handle,
- enum lttng_tracker_type tracker_type,
- const struct lttng_tracker_id *id,
- enum lttcomm_sessiond_command cmd)
-{
- int ret;
- struct lttcomm_session_msg lsm;
- const char *var_data = NULL;
- size_t var_data_len = 0;
- int value;
- enum lttng_tracker_id_status status;
-
- /* NULL arguments are forbidden. No default values. */
- if (handle == NULL) {
- goto error;
- }
-
- memset(&lsm, 0, sizeof(lsm));
-
- lsm.cmd_type = cmd;
- lsm.u.id_tracker.tracker_type = tracker_type;
- lsm.u.id_tracker.id_type = lttng_tracker_id_get_type(id);
- switch (lsm.u.id_tracker.id_type) {
- case LTTNG_ID_ALL:
- break;
- case LTTNG_ID_VALUE:
- status = lttng_tracker_id_get_value(id, &value);
- if (status != LTTNG_TRACKER_ID_STATUS_OK) {
- goto error;
- }
- lsm.u.id_tracker.u.value = value;
- break;
- case LTTNG_ID_STRING:
- status = lttng_tracker_id_get_string(id, &var_data);
- if (status != LTTNG_TRACKER_ID_STATUS_OK) {
- goto error;
- }
- var_data_len = strlen(var_data) + 1; /* Includes \0. */
- lsm.u.id_tracker.u.var_len = var_data_len;
- break;
- default:
- goto error;
- }
-
- COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
-
- lttng_ctl_copy_string(lsm.session.name, handle->session_name,
- sizeof(lsm.session.name));
-
+ lsm.u.trigger.length = (uint32_t) payload.buffer.size;
ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(
- &lsm, (char *) var_data, var_data_len, NULL);
- return ret;
-error:
- return -LTTNG_ERR_INVALID;
-}
-
-/*
- * Add ID to session tracker.
- * Return 0 on success else a negative LTTng error code.
- */
-int lttng_track_id(struct lttng_handle *handle,
- enum lttng_tracker_type tracker_type,
- const struct lttng_tracker_id *id)
-{
- return lttng_track_untrack_id(handle, tracker_type, id, LTTNG_TRACK_ID);
-}
-
-/*
- * Remove ID from session tracker.
- * Return 0 on success else a negative LTTng error code.
- */
-int lttng_untrack_id(struct lttng_handle *handle,
- enum lttng_tracker_type tracker_type,
- const struct lttng_tracker_id *id)
-{
- return lttng_track_untrack_id(
- handle, tracker_type, id, LTTNG_UNTRACK_ID);
-}
-
-/*
- * Add PID to session tracker.
- * Return 0 on success else a negative LTTng error code.
- */
-int lttng_track_pid(struct lttng_handle *handle, int pid)
-{
- int ret;
- struct lttng_tracker_id *id = NULL;
- enum lttng_tracker_id_status status;
-
- id = lttng_tracker_id_create();
- status = lttng_tracker_id_set_value(id, pid);
- if (status == LTTNG_TRACKER_ID_STATUS_INVALID) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- ret = lttng_track_id(handle, LTTNG_TRACKER_PID, id);
-error:
- lttng_tracker_id_destroy(id);
- return ret;
-}
-
-/*
- * Remove PID from session tracker.
- * Return 0 on success else a negative LTTng error code.
- */
-int lttng_untrack_pid(struct lttng_handle *handle, int pid)
-{
- int ret;
- struct lttng_tracker_id *id = NULL;
- enum lttng_tracker_id_status status;
-
- id = lttng_tracker_id_create();
- status = lttng_tracker_id_set_value(id, pid);
- if (status == LTTNG_TRACKER_ID_STATUS_INVALID) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- ret = lttng_untrack_id(handle, LTTNG_TRACKER_PID, id);
-error:
- lttng_tracker_id_destroy(id);
+ &lsm, payload.buffer.data, payload.buffer.size, NULL);
+end:
+ lttng_payload_reset(&payload);
return ret;
}
projects / lttng-tools.git / blobdiff