*
*/
-#include "bin/lttng-sessiond/tracker.h"
-#include "lttng/lttng-error.h"
-#include "lttng/tracker.h"
#define _LGPL_SOURCE
#include <assert.h>
#include <inttypes.h>
#include <lttng/session-internal.h>
#include <lttng/userspace-probe-internal.h>
#include <lttng/session-descriptor-internal.h>
+#include <lttng/lttng-error.h>
+#include <lttng/tracker.h>
#include <common/string-utils/string-utils.h>
#include "channel.h"
#include "rotation-thread.h"
#include "timer.h"
#include "agent-thread.h"
+#include "tracker.h"
#include "cmd.h"
.loglevel_type = agent_event->loglevel_type,
};
- strncpy(event.name, agent_event->name, sizeof(event.name));
- event.name[sizeof(event.name) - 1] = '\0';
+ ret = lttng_strncpy(event.name, agent_event->name, sizeof(event.name));
+ if (ret) {
+ /* Internal error, invalid name. */
+ ERR("Invalid event name while listing agent events: '%s' exceeds the maximal allowed length of %zu bytes",
+ agent_event->name, sizeof(event.name));
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
ret = lttng_dynamic_buffer_append(
&payload->buffer, &event, sizeof(event));
continue;
}
- strncpy(event.name, uevent->attr.name, sizeof(event.name));
- event.name[sizeof(event.name) - 1] = '\0';
+ ret = lttng_strncpy(event.name, uevent->attr.name, sizeof(event.name));
+ if (ret) {
+ /* Internal error, invalid name. */
+ ERR("Invalid event name while listing user space tracer events: '%s' exceeds the maximal allowed length of %zu bytes",
+ uevent->attr.name, sizeof(event.name));
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
event.enabled = uevent->enabled;
cds_list_for_each_entry(kevent, &kchan->events_list.head , list) {
struct lttng_event event = {};
- strncpy(event.name, kevent->event->name, sizeof(event.name));
- event.name[sizeof(event.name) - 1] = '\0';
+ ret = lttng_strncpy(event.name, kevent->event->name, sizeof(event.name));
+ if (ret) {
+ /* Internal error, invalid name. */
+ ERR("Invalid event name while listing kernel events: '%s' exceeds the maximal allowed length of %zu bytes",
+ kevent->event->name,
+ sizeof(event.name));
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
event.enabled = kevent->enabled;
event.filter = (unsigned char) !!kevent->filter_expression;
struct consumer_socket *consumer_sock,
const char *session_name, const char *hostname,
const char *base_path, int session_live_timer,
- const uint64_t *current_chunk_id,
+ const uint64_t *current_chunk_id,
time_t session_creation_time,
bool session_name_contains_creation_time)
{
struct ltt_kernel_session *ksess;
struct consumer_socket *socket;
struct lttng_ht_iter iter;
- LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
+ LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
- assert(session);
+ assert(session);
usess = session->ust_session;
ksess = session->kernel_session;
*/
ret = validate_ust_event_name(event->name);
if (ret) {
- WARN("Userspace event name %s failed validation.",
+ WARN("Userspace event name %s failed validation.",
event->name);
ret = LTTNG_ERR_INVALID_EVENT_NAME;
goto error;
&payload,
0,
cmd_ctx->lsm.u.create_session.home_dir_size);
+ if (cmd_ctx->lsm.u.create_session.home_dir_size > 0 &&
+ !lttng_buffer_view_is_valid(&home_dir_view)) {
+ ERR("Invalid payload in \"create session\" command: buffer too short to contain home directory");
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto error;
+ }
+
session_descriptor_view = lttng_buffer_view_from_dynamic_buffer(
&payload,
cmd_ctx->lsm.u.create_session.home_dir_size,
cmd_ctx->lsm.u.create_session.session_descriptor_size);
+ if (!lttng_buffer_view_is_valid(&session_descriptor_view)) {
+ ERR("Invalid payload in \"create session\" command: buffer too short to contain session descriptor");
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto error;
+ }
ret = lttng_session_descriptor_create_from_buffer(
&session_descriptor_view, &session_descriptor);
lttng_dynamic_buffer_init(&payload);
ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm));
- if (ret) {
+ if (ret) {
ERR("Failed to append session destruction message");
goto error;
- }
+ }
cmd_header.rotation_state =
(int32_t) (reply_context->implicit_rotation_on_destroy ?
session->name, lttng_strerror(-ret));
destruction_last_error = -ret;
}
- if (reply_context) {
+ if (reply_context) {
reply_context->implicit_rotation_on_destroy = true;
- }
- } else if (session->has_been_started && session->current_trace_chunk) {
+ }
+ } else if (session->has_been_started && session->current_trace_chunk) {
/*
* The user has not triggered a session rotation. However, to
* ensure all data has been consumed, the session is rotated
} else {
*sock_fd = -1;
}
- }
- ret = LTTNG_OK;
+ }
+ ret = LTTNG_OK;
end:
return ret;
}
unsigned int i = 0;
struct ltt_session *session;
struct ltt_session_list *list = session_get_list();
- struct lttng_session_extended *extended =
+ struct lttng_session_extended *extended =
(typeof(extended)) (&sessions[session_count]);
DBG("Getting all available session for UID %d GID %d",
/*
* Only list the sessions the user can control.
*/
- if (!session_access_ok(session, uid, gid) ||
+ if (!session_access_ok(session, uid) ||
session->destroyed) {
session_put(session);
continue;
}
int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock,
- struct notification_thread_handle *notification_thread)
+ struct notification_thread_handle *notification_thread,
+ struct lttng_trigger **return_trigger)
{
int ret;
size_t trigger_len;
struct lttng_trigger *trigger = NULL;
struct lttng_payload trigger_payload;
struct lttng_credentials cmd_creds = {
- .uid = cmd_ctx->creds.uid,
- .gid = cmd_ctx->creds.gid,
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid),
+ .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid),
};
lttng_payload_init(&trigger_payload);
sock, trigger_payload.buffer.data, trigger_len);
if (sock_recv_len < 0 || sock_recv_len != trigger_len) {
ERR("Failed to receive \"register trigger\" command payload");
- /* TODO: should this be a new error enum ? */
- ret = LTTNG_ERR_INVALID_TRIGGER;
+ ret = LTTNG_ERR_INVALID_PROTOCOL;
goto end;
}
}
}
- /* Set the trigger credential */
- lttng_trigger_set_credentials(trigger, &cmd_creds);
+ /*
+ * Validate the trigger credentials against the command credentials.
+ * Only the root user can register a trigger with non-matching
+ * credentials.
+ */
+ if (!lttng_credentials_is_equal_uid(
+ lttng_trigger_get_credentials(trigger),
+ &cmd_creds)) {
+ if (lttng_credentials_get_uid(&cmd_creds) != 0) {
+ ERR("Trigger credentials do not match the command credentials");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
- /* Inform the notification thread */
+ /*
+ * The bytecode generation also serves as a validation step for the
+ * bytecode expressions.
+ */
+ ret = lttng_trigger_generate_bytecode(trigger, &cmd_creds);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ /*
+ * A reference to the trigger is acquired by the notification thread.
+ * It is safe to return the same trigger to the caller since it the
+ * other user holds a reference.
+ *
+ * The trigger is modified during the execution of the
+ * "register trigger" command. However, by the time the command returns,
+ * it is safe to use without any locking as its properties are
+ * immutable.
+ */
ret = notification_thread_command_register_trigger(notification_thread,
trigger);
+ if (ret != LTTNG_OK) {
+ goto end_notification_thread;
+ }
+
+ /* Return an updated trigger to the client. */
+ *return_trigger = trigger;
+
+end_notification_thread:
/* Ownership of trigger was transferred. */
trigger = NULL;
end:
struct lttng_trigger *trigger = NULL;
struct lttng_payload trigger_payload;
struct lttng_credentials cmd_creds = {
- .uid = cmd_ctx->creds.uid,
- .gid = cmd_ctx->creds.gid,
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid),
+ .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid),
};
lttng_payload_init(&trigger_payload);
}
}
- lttng_trigger_set_credentials(trigger, &cmd_creds);
+ /*
+ * Validate the trigger credentials against the command credentials.
+ * Only the root user can unregister a trigger with non-matching
+ * credentials.
+ */
+ if (!lttng_credentials_is_equal_uid(
+ lttng_trigger_get_credentials(trigger),
+ &cmd_creds)) {
+ if (lttng_credentials_get_uid(&cmd_creds) != 0) {
+ ERR("Trigger credentials do not match the command credentials");
+ ret = LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+ }
ret = notification_thread_command_unregister_trigger(notification_thread,
trigger);
return ret;
}
+int cmd_list_triggers(struct command_ctx *cmd_ctx,
+ struct notification_thread_handle *notification_thread,
+ struct lttng_triggers **return_triggers)
+{
+ int ret = 0;
+ enum lttng_error_code ret_code;
+ struct lttng_triggers *triggers = NULL;
+
+ /* Get the set of triggers from the notification thread. */
+ ret_code = notification_thread_command_list_triggers(
+ notification_thread, cmd_ctx->creds.uid, &triggers);
+ if (ret_code != LTTNG_OK) {
+ ret = ret_code;
+ goto end;
+ }
+
+ *return_triggers = triggers;
+ triggers = NULL;
+ ret = LTTNG_OK;
+end:
+ lttng_triggers_destroy(triggers);
+ return ret;
+}
/*
* Send relayd sockets from snapshot output to consumer. Ignore request if the
* snapshot output is *not* set with a remote destination.
cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL;
goto error;
}
- }
+ }
/*
* The current trace chunk becomes the chunk being archived.
projects / lttng-tools.git / blobdiff