#include <common/kernel-ctl/kernel-ctl.h>
#include <lttng/notification/channel-internal.h>
+#include <lttng/rotate-internal.h>
#include "rotation-thread.h"
#include "lttng-sessiond.h"
#include "rotate.h"
#include "cmd.h"
#include "session.h"
+#include "sessiond-timer.h"
#include <urcu.h>
#include <urcu/list.h>
struct lttng_pipe *ust32_channel_rotate_pipe,
struct lttng_pipe *ust64_channel_rotate_pipe,
struct lttng_pipe *kernel_channel_rotate_pipe,
- int thread_quit_pipe)
+ int thread_quit_pipe,
+ struct rotation_thread_timer_queue *rotation_timer_queue)
{
struct rotation_thread_handle *handle;
handle->kernel_consumer = -1;
}
handle->thread_quit_pipe = thread_quit_pipe;
+ handle->rotation_timer_queue = rotation_timer_queue;
end:
return handle;
int ret;
/*
- * Create pollset with size 4:
+ * Create pollset with size 5:
* - sessiond quit pipe
+ * - sessiond timer pipe,
* - consumerd (32-bit user space) channel rotate pipe,
* - consumerd (64-bit user space) channel rotate pipe,
* - consumerd (kernel) channel rotate pipe,
*/
- ret = lttng_poll_create(poll_set, 4, LTTNG_CLOEXEC);
+ ret = lttng_poll_create(poll_set, 5, LTTNG_CLOEXEC);
if (ret < 0) {
goto end;
}
ERR("[rotation-thread] Failed to add thread_quit_pipe fd to pollset");
goto error;
}
+ ret = lttng_poll_add(poll_set,
+ lttng_pipe_get_readfd(handle->rotation_timer_queue->event_pipe),
+ LPOLLIN | LPOLLERR);
+ if (ret < 0) {
+ ERR("[rotation-thread] Failed to add rotate_pending fd to pollset");
+ goto error;
+ }
ret = lttng_poll_add(poll_set, handle->ust32_consumer,
LPOLLIN | LPOLLERR);
if (ret < 0) {
time_t now = time(NULL);
if (now == (time_t) -1) {
- session->rotation_status = LTTNG_ROTATION_STATUS_ERROR;
+ session->rotation_state = LTTNG_ROTATION_STATE_ERROR;
ret = LTTNG_ERR_UNK;
goto end_unlock_session;
}
goto end_unlock_session;
}
session->rotate_pending = false;
- session->rotation_status = LTTNG_ROTATION_STATUS_COMPLETED;
+ session->rotation_state = LTTNG_ROTATION_STATE_COMPLETED;
session->last_chunk_start_ts = session->current_chunk_start_ts;
+ if (session->rotate_pending_relay) {
+ ret = sessiond_timer_rotate_pending_start(
+ session,
+ DEFAULT_ROTATE_PENDING_RELAY_TIMER);
+ if (ret) {
+ ERR("Failed to enable rotate pending timer");
+ ret = -1;
+ goto end_unlock_session;
+ }
+ }
DBG("Rotation completed for session %s", session->name);
}
return ret;
}
+/*
+ * Process the rotate_pending check, called with session lock held.
+ */
+static
+int rotate_pending_relay_timer(struct ltt_session *session)
+{
+ int ret;
+
+ DBG("[rotation-thread] Check rotate pending on session %" PRIu64,
+ session->id);
+ ret = relay_rotate_pending(session, session->rotate_count - 1);
+ if (ret < 0) {
+ ERR("[rotation-thread] Check relay rotate pending");
+ goto end;
+ }
+ if (ret == 0) {
+ DBG("[rotation-thread] Rotation completed on the relay for "
+ "session %" PRIu64, session->id);
+ /*
+ * Now we can clear the pending flag in the session. New
+ * rotations can start now.
+ */
+ session->rotate_pending_relay = false;
+ } else if (ret == 1) {
+ DBG("[rotation-thread] Rotation still pending on the relay for "
+ "session %" PRIu64, session->id);
+ ret = sessiond_timer_rotate_pending_start(session,
+ DEFAULT_ROTATE_PENDING_RELAY_TIMER);
+ if (ret) {
+ ERR("Re-enabling rotate pending timer");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
+/*
+ * Process the rotate_timer, called with session lock held.
+ */
+static
+int rotate_timer(struct ltt_session *session)
+{
+ int ret;
+
+ /*
+ * Complete _at most_ one scheduled rotation on a stopped session.
+ */
+ if (!session->active && session->rotate_timer_enabled &&
+ session->rotated_after_last_stop) {
+ ret = 0;
+ goto end;
+ }
+
+ /* Ignore this timer if a rotation is already in progress. */
+ if (session->rotate_pending || session->rotate_pending_relay) {
+ ret = 0;
+ goto end;
+ }
+
+ DBG("[rotation-thread] Rotate timer on session %s", session->name);
+
+ ret = cmd_rotate_session(session, NULL);
+ if (ret == -LTTNG_ERR_ROTATION_PENDING) {
+ DBG("Scheduled rotation aborted since a rotation is already in progress");
+ ret = 0;
+ goto end;
+ } else if (ret != LTTNG_OK) {
+ ERR("[rotation-thread] Automatic time-triggered rotation failed with error code %i", ret);
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
+static
+int handle_rotate_timer_pipe(uint32_t revents,
+ struct rotation_thread_handle *handle,
+ struct rotation_thread_state *state,
+ struct rotation_thread_timer_queue *queue)
+{
+ int ret = 0;
+ int fd = lttng_pipe_get_readfd(queue->event_pipe);
+ struct ltt_session *session;
+ char buf[1];
+
+ if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
+ ret = lttng_poll_del(&state->events, fd);
+ if (ret) {
+ ERR("[rotation-thread] Failed to remove consumer "
+ "rotate pending pipe from poll set");
+ }
+ goto end;
+ }
+
+ ret = lttng_read(fd, buf, 1);
+ if (ret != 1) {
+ ERR("[rotation-thread] Failed to read from wakeup pipe (fd = %i)", fd);
+ ret = -1;
+ goto end;
+ }
+
+ for (;;) {
+ struct sessiond_rotation_timer *timer_data;
+
+ /*
+ * Take the queue lock only to pop elements from the list.
+ */
+ pthread_mutex_lock(&queue->lock);
+ if (cds_list_empty(&queue->list)) {
+ pthread_mutex_unlock(&queue->lock);
+ break;
+ }
+ timer_data = cds_list_first_entry(&queue->list,
+ struct sessiond_rotation_timer, head);
+ cds_list_del(&timer_data->head);
+ pthread_mutex_unlock(&queue->lock);
+
+ /*
+ * session lock to lookup the session ID.
+ */
+ session_lock_list();
+ session = session_find_by_id(timer_data->session_id);
+ if (!session) {
+ DBG("[rotation-thread] Session %" PRIu64 " not found",
+ timer_data->session_id);
+ /*
+ * This is a non-fatal error, and we cannot report it to the
+ * user (timer), so just print the error and continue the
+ * processing.
+ */
+ session_unlock_list();
+ free(timer_data);
+ continue;
+ }
+
+ /*
+ * Take the session lock and release the session_list lock.
+ */
+ session_lock(session);
+ session_unlock_list();
+
+ if (timer_data->signal == LTTNG_SESSIOND_SIG_ROTATE_PENDING) {
+ ret = rotate_pending_relay_timer(session);
+ } else if (timer_data->signal == LTTNG_SESSIOND_SIG_ROTATE_TIMER) {
+ ret = rotate_timer(session);
+ } else {
+ ERR("Unknown signal in rotate timer %d", timer_data->signal);
+ ret = -1;
+ }
+ session_unlock(session);
+ free(timer_data);
+ if (ret) {
+ ERR("Error processing timer");
+ goto end;
+ }
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
void *thread_rotation(void *data)
{
int ret;
if (fd == handle->thread_quit_pipe) {
DBG("[rotation-thread] Quit pipe activity");
goto exit;
+ } else if (fd == lttng_pipe_get_readfd(handle->rotation_timer_queue->event_pipe)) {
+ ret = handle_rotate_timer_pipe(revents,
+ handle, &state, handle->rotation_timer_queue);
+ if (ret) {
+ ERR("[rotation-thread] Failed to handle rotation timer pipe event");
+ goto error;
+ }
} else if (fd == handle->ust32_consumer ||
fd == handle->ust64_consumer ||
fd == handle->kernel_consumer) {
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