*
* Linux Trace Toolkit Control Library
*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 EfficiOS Inc.
* Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
* SPDX-License-Identifier: LGPL-2.1-only
#include <grp.h>
#include <stdio.h>
#include <stdlib.h>
+#include <stdint.h>
#include <string.h>
#include <unistd.h>
+#include <common/bytecode/bytecode.h>
#include <common/common.h>
#include <common/compat/errno.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/dynamic-buffer.h>
#include <common/payload-view.h>
+#include <common/payload.h>
#include <common/sessiond-comm/sessiond-comm.h>
#include <common/tracker.h>
#include <common/unix.h>
#include <lttng/channel-internal.h>
#include <lttng/destruction-handle.h>
#include <lttng/endpoint.h>
+#include <lttng/error-query-internal.h>
#include <lttng/event-internal.h>
#include <lttng/health-internal.h>
+#include <lttng/lttng-error.h>
#include <lttng/lttng.h>
#include <lttng/session-descriptor-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 "lttng-ctl-helper.h"
#include <common/filter/filter-ast.h>
#include <common/filter/filter-parser.h>
-#include <common/filter/filter-bytecode.h>
#include <common/filter/memstream.h>
-#include "lttng-ctl-helper.h"
#define COPY_DOMAIN_PACKED(dst, src) \
do { \
goto end;
}
- DBG("LSM cmd type : %d", lsm->cmd_type);
+ DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type),
+ lsm->cmd_type);
ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm,
sizeof(struct lttcomm_session_msg));
return ret;
}
-static int check_enough_available_memory(size_t num_bytes_requested_per_cpu)
+static enum lttng_error_code check_enough_available_memory(
+ uint64_t num_bytes_requested_per_cpu)
{
int ret;
+ enum lttng_error_code ret_code;
long num_cpu;
- size_t best_mem_info;
- size_t num_bytes_requested_total;
+ uint64_t best_mem_info;
+ uint64_t num_bytes_requested_total;
/*
* Get the number of CPU currently online to compute the amount of
*/
num_cpu = sysconf(_SC_NPROCESSORS_ONLN);
if (num_cpu == -1) {
- goto error;
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) {
+ /* Overflow */
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto end;
}
- num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu;
+ num_bytes_requested_total =
+ num_bytes_requested_per_cpu * (uint64_t) num_cpu;
/*
* Try to get the `MemAvail` field of `/proc/meminfo`. This is the most
goto success;
}
-error:
- return -1;
+ /* No valid source of information. */
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+
success:
- return best_mem_info >= num_bytes_requested_total;
+ if (best_mem_info >= num_bytes_requested_total) {
+ ret_code = LTTNG_OK;
+ } else {
+ ret_code = LTTNG_ERR_NOMEM;
+ }
+end:
+ return ret_code;
}
/*
in_tgroup = lttng_check_tracing_group();
}
- if ((uid == 0) || in_tgroup) {
+ if ((uid == 0) || in_tgroup == 1) {
const int ret = lttng_strncpy(sessiond_sock_path,
DEFAULT_GLOBAL_CLIENT_UNIX_SOCK,
sizeof(sessiond_sock_path));
/* Check error code if OK */
if (llm.ret_code != LTTNG_OK) {
- ret = -llm.ret_code;
+ if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) {
+ /* Invalid error code received. */
+ ret = -LTTNG_ERR_UNK;
+ } else {
+ ret = -llm.ret_code;
+ }
goto end;
}
for (i = 0; i < exclusion_count; i++) {
size_t exclusion_len;
- exclusion_len = lttng_strnlen(*(exclusion_list + i),
+ exclusion_len = lttng_strnlen(exclusion_list[i],
LTTNG_SYMBOL_NAME_LEN);
if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) {
/* Exclusion is not NULL-terminated. */
}
ret = lttng_dynamic_buffer_append(&payload.buffer,
- *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN);
+ exclusion_list[i], exclusion_len);
+ if (ret) {
+ goto mem_error;
+ }
+
+ /*
+ * Padding the rest of the entry with zeros. Every exclusion
+ * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer.
+ */
+ ret = lttng_dynamic_buffer_set_size(&payload.buffer,
+ LTTNG_SYMBOL_NAME_LEN * (i + 1));
if (ret) {
goto mem_error;
}
assert(fd_count == 0 || fd_count == 1);
if (fd_count == 1) {
- struct fd_handle *handle =
+ struct fd_handle *h =
lttng_payload_view_pop_fd_handle(&view);
- if (!handle) {
+ if (!h) {
goto mem_error;
}
- fd_to_send = fd_handle_get_fd(handle);
- fd_handle_put(handle);
+ fd_to_send = fd_handle_get_fd(h);
+ fd_handle_put(h);
}
ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm,
int lttng_enable_channel(struct lttng_handle *handle,
struct lttng_channel *in_chan)
{
+ enum lttng_error_code ret_code;
int ret;
struct lttcomm_session_msg lsm;
- size_t total_buffer_size_needed_per_cpu = 0;
+ uint64_t total_buffer_size_needed_per_cpu = 0;
/* NULL arguments are forbidden. No default values. */
if (handle == NULL || in_chan == NULL) {
* Verify that the amount of memory required to create the requested
* buffer is available on the system at the moment.
*/
+ if (lsm.u.channel.chan.attr.num_subbuf >
+ UINT64_MAX / lsm.u.channel.chan.attr.subbuf_size) {
+ /* Overflow */
+ ret = -LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
+
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;
+ ret_code = check_enough_available_memory(
+ total_buffer_size_needed_per_cpu);
+ if (ret_code != LTTNG_OK) {
+ ret = -ret_code;
+ goto end;
}
lsm.cmd_type = LTTNG_ENABLE_CHANNEL;
enum lttng_error_code ret_code;
ret_code = lttng_destroy_session_ext(session_name, NULL);
- return ret_code == LTTNG_OK ? ret_code : -ret_code;
+ return ret_code == LTTNG_OK ? 0 : -ret_code;
}
/*
memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_SESSIONS;
+ /*
+ * Initialize out_sessions to NULL so it is initialized when
+ * lttng_list_sessions returns 0, thus allowing *out_sessions to
+ * be subsequently freed.
+ */
+ *out_sessions = NULL;
ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions);
if (ret <= 0) {
goto end;
if (ret % session_size) {
ret = -LTTNG_ERR_UNK;
free(sessions);
- *out_sessions = NULL;
goto end;
}
session_count = (size_t) ret / session_size;
*/
int lttng_set_tracing_group(const char *name)
{
+ char *new_group;
if (name == NULL) {
return -LTTNG_ERR_INVALID;
}
- if (asprintf(&tracing_group, "%s", name) < 0) {
+ if (asprintf(&new_group, "%s", name) < 0) {
return -LTTNG_ERR_FATAL;
}
+ free(tracing_group);
+ tracing_group = new_group;
+ new_group = NULL;
+
return 0;
}
return ret;
}
-int lttng_register_trigger(struct lttng_trigger *trigger)
+static
+int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name,
+ bool generate_name)
{
int ret;
struct lttcomm_session_msg lsm = {
.cmd_type = LTTNG_REGISTER_TRIGGER,
+ .u.trigger.is_trigger_anonymous = !name && !generate_name,
};
struct lttcomm_session_msg *message_lsm;
struct lttng_payload message;
.uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()),
.gid = LTTNG_OPTIONAL_INIT_UNSET,
};
-
+ const char *unused_trigger_name = NULL;
+ enum lttng_trigger_status trigger_status;
lttng_payload_init(&message);
lttng_payload_init(&reply);
goto end;
}
+ trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name);
+ if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) {
+ /* Re-using already registered trigger. */
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (name) {
+ trigger_status = lttng_trigger_set_name(trigger, name);
+ if (trigger_status != LTTNG_TRIGGER_STATUS_OK) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ }
+
if (!trigger->creds.uid.is_set) {
/* Use the client's credentials as the trigger credentials. */
lttng_trigger_set_credentials(trigger, &user_creds);
if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) {
if (lttng_credentials_get_uid(&user_creds) != 0) {
ret = -LTTNG_ERR_EPERM;
- goto end;
+ goto end_unset_name;
}
}
}
if (!lttng_trigger_validate(trigger)) {
ret = -LTTNG_ERR_INVALID_TRIGGER;
- goto end;
+ goto end_unset_name;
}
domain_type = lttng_trigger_get_underlying_domain_type_restriction(
ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm));
if (ret) {
ret = -LTTNG_ERR_NOMEM;
- goto end;
+ goto end_unset_name;
}
- /*
- * This is needed to populate the trigger object size for the command
- * header.
- */
- message_lsm = (struct lttcomm_session_msg *) message.buffer.data;
-
ret = lttng_trigger_serialize(trigger, &message);
if (ret < 0) {
ret = -LTTNG_ERR_UNK;
- goto end;
+ goto end_unset_name;
}
+ /*
+ * This is needed to populate the trigger object size for the command
+ * header.
+ */
+ message_lsm = (struct lttcomm_session_msg *) message.buffer.data;
+
message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm);
{
&message_view);
ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply);
if (ret < 0) {
- goto end;
+ goto end_unset_name;
}
}
ret = lttng_trigger_create_from_payload(
&reply_view, &reply_trigger);
if (ret < 0) {
- ret = -LTTNG_ERR_FATAL;
- goto end;
+ ret = -LTTNG_ERR_INVALID_PROTOCOL;
+ goto end_unset_name;
}
}
- ret = lttng_trigger_assign_name(trigger, reply_trigger);
- if (ret < 0) {
- ret = -LTTNG_ERR_FATAL;
- goto end;
+ if (name || generate_name) {
+ ret = lttng_trigger_assign_name(trigger, reply_trigger);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
}
ret = 0;
+ goto end;
+
+end_unset_name:
+ trigger_status = lttng_trigger_set_name(trigger, NULL);
+ if (trigger_status != LTTNG_TRIGGER_STATUS_OK) {
+ ret = -LTTNG_ERR_UNK;
+ }
end:
lttng_payload_reset(&message);
lttng_payload_reset(&reply);
return ret;
}
-int lttng_unregister_trigger(struct lttng_trigger *trigger)
+int lttng_register_trigger(struct lttng_trigger *trigger)
+{
+ /* Register an anonymous trigger. */
+ return _lttng_register_trigger(trigger, NULL, false);
+}
+
+enum lttng_error_code lttng_register_trigger_with_name(
+ struct lttng_trigger *trigger, const char *name)
+{
+ const int ret = _lttng_register_trigger(trigger, name, false);
+
+ return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret;
+}
+
+enum lttng_error_code lttng_register_trigger_with_automatic_name(
+ struct lttng_trigger *trigger)
+{
+ const int ret = _lttng_register_trigger(trigger, false, true);
+
+ return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret;
+}
+
+enum lttng_error_code lttng_error_query_execute(
+ const struct lttng_error_query *query,
+ const struct lttng_endpoint *endpoint,
+ struct lttng_error_query_results **results)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ struct lttcomm_session_msg lsm = {
+ .cmd_type = LTTNG_EXECUTE_ERROR_QUERY,
+ };
+ struct lttng_payload message;
+ struct lttng_payload reply;
+ struct lttcomm_session_msg *message_lsm;
+
+ lttng_payload_init(&message);
+ lttng_payload_init(&reply);
+
+ if (!query || !results) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (endpoint != lttng_session_daemon_command_endpoint) {
+ ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET;
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm));
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ ret = lttng_error_query_serialize(query, &message);
+ if (ret) {
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ message_lsm = (struct lttcomm_session_msg *) message.buffer.data;
+ message_lsm->u.error_query.length =
+ (uint32_t) message.buffer.size - sizeof(lsm);
+
+ {
+ struct lttng_payload_view message_view =
+ lttng_payload_view_from_payload(
+ &message, 0, -1);
+
+ message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(
+ &message_view);
+ ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply);
+ if (ret < 0) {
+ ret_code = -ret;
+ goto end;
+ }
+ }
+
+ {
+ ssize_t reply_create_ret;
+ struct lttng_payload_view reply_view =
+ lttng_payload_view_from_payload(
+ &reply, 0, reply.buffer.size);
+
+ reply_create_ret = lttng_error_query_results_create_from_payload(
+ &reply_view, results);
+ if (reply_create_ret < 0) {
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+ }
+
+ ret_code = LTTNG_OK;
+end:
+ lttng_payload_reset(&message);
+ lttng_payload_reset(&reply);
+ return ret_code;
+}
+
+int lttng_unregister_trigger(const struct lttng_trigger *trigger)
{
int ret;
struct lttcomm_session_msg lsm;
struct lttcomm_session_msg *message_lsm;
struct lttng_payload message;
struct lttng_payload reply;
+ struct lttng_trigger *copy = NULL;
const struct lttng_credentials user_creds = {
.uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()),
.gid = LTTNG_OPTIONAL_INIT_UNSET,
goto end;
}
- if (!trigger->creds.uid.is_set) {
- /* Use the client's credentials as the trigger credentials. */
- lttng_trigger_set_credentials(trigger, &user_creds);
+ copy = lttng_trigger_copy(trigger);
+ if (!copy) {
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ if (!copy->creds.uid.is_set) {
+ /* Use the client credentials as the trigger credentials */
+ lttng_trigger_set_credentials(copy, &user_creds);
} else {
/*
* Validate that either the current trigger credentials and the
* "safety" checks.
*/
const struct lttng_credentials *trigger_creds =
- lttng_trigger_get_credentials(trigger);
-
+ lttng_trigger_get_credentials(copy);
if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) {
if (lttng_credentials_get_uid(&user_creds) != 0) {
ret = -LTTNG_ERR_EPERM;
}
}
- if (!lttng_trigger_validate(trigger)) {
+ if (!lttng_trigger_validate(copy)) {
ret = -LTTNG_ERR_INVALID_TRIGGER;
goto end;
}
goto end;
}
+ ret = lttng_trigger_serialize(copy, &message);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
/*
* This is needed to populate the trigger object size for the command
* header and number of fds sent.
*/
message_lsm = (struct lttcomm_session_msg *) message.buffer.data;
- ret = lttng_trigger_serialize(trigger, &message);
- if (ret < 0) {
- ret = -LTTNG_ERR_UNK;
- goto end;
- }
-
message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm);
{
ret = 0;
end:
+ lttng_trigger_destroy(copy);
lttng_payload_reset(&message);
lttng_payload_reset(&reply);
return ret;
projects / lttng-tools.git / blobdiff