#define _LGPL_SOURCE
#include <common/common.h>
+#include <common/utils.h>
+#include <common/compat/uuid.h>
#include <urcu/rculist.h>
-#include "lttng-relayd.h"
+#include <sys/stat.h>
+
#include "ctf-trace.h"
+#include "lttng-relayd.h"
#include "session.h"
+#include "sessiond-trace-chunks.h"
#include "stream.h"
+#include <common/defaults.h>
+#include "utils.h"
/* Global session id used in the session creation. */
static uint64_t last_relay_session_id;
static pthread_mutex_t last_relay_session_id_lock = PTHREAD_MUTEX_INITIALIZER;
+static int init_session_output_path(struct relay_session *session)
+{
+ /*
+ * session_directory:
+ *
+ * if base_path is \0'
+ * hostname/session_name
+ * else
+ * hostname/base_path
+ */
+ char *session_directory = NULL;
+ int ret = 0;
+
+ if (session->output_path[0] != '\0') {
+ goto end;
+ }
+ /*
+ * If base path is set, it overrides the session name for the
+ * session relative base path. No timestamp is appended if the
+ * base path is overridden.
+ *
+ * If the session name already contains the creation time (e.g.
+ * auto-<timestamp>, don't append yet another timestamp after
+ * the session name in the generated path.
+ *
+ * Otherwise, generate the path with session_name-<timestamp>.
+ */
+ if (session->base_path[0] != '\0') {
+ ret = asprintf(&session_directory, "%s/%s", session->hostname,
+ session->base_path);
+ } else if (session->session_name_contains_creation_time) {
+ ret = asprintf(&session_directory, "%s/%s", session->hostname,
+ session->session_name);
+ } else {
+ char session_creation_datetime[16];
+ size_t strftime_ret;
+ struct tm *timeinfo;
+ time_t creation_time;
+
+ /*
+ * The 2.11+ protocol guarantees that a creation time
+ * is provided for a session. This would indicate a
+ * protocol error or an improper use of this util.
+ */
+ if (!session->creation_time.is_set) {
+ ERR("Creation time missing for session \"%s\" (protocol error)",
+ session->session_name);
+ ret = -1;
+ goto end;
+ }
+ creation_time = LTTNG_OPTIONAL_GET(session->creation_time);
+
+ timeinfo = localtime(&creation_time);
+ if (!timeinfo) {
+ ERR("Failed to get timeinfo while initializing session output directory handle");
+ ret = -1;
+ goto end;
+ }
+ strftime_ret = strftime(session_creation_datetime,
+ sizeof(session_creation_datetime),
+ "%Y%m%d-%H%M%S", timeinfo);
+ if (strftime_ret == 0) {
+ ERR("Failed to format session creation timestamp while initializing session output directory handle");
+ ret = -1;
+ goto end;
+ }
+ ret = asprintf(&session_directory, "%s/%s-%s",
+ session->hostname, session->session_name,
+ session_creation_datetime);
+ }
+ if (ret < 0) {
+ PERROR("Failed to format session directory name");
+ goto end;
+ }
+
+ if (strlen(session_directory) >= LTTNG_PATH_MAX) {
+ ERR("Session output directory exceeds maximal length");
+ ret = -1;
+ goto end;
+ }
+ strcpy(session->output_path, session_directory);
+ ret = 0;
+
+end:
+ free(session_directory);
+ return ret;
+}
+
+static int session_set_anonymous_chunk(struct relay_session *session)
+{
+ int ret = 0;
+ struct lttng_trace_chunk *chunk = NULL;
+ enum lttng_trace_chunk_status status;
+ struct lttng_directory_handle output_directory;
+
+ ret = session_init_output_directory_handle(session, &output_directory);
+ if (ret) {
+ goto end;
+ }
+
+ chunk = lttng_trace_chunk_create_anonymous();
+ if (!chunk) {
+ goto end;
+ }
+
+ status = lttng_trace_chunk_set_credentials_current_user(chunk);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_trace_chunk_set_as_owner(chunk, &output_directory);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+ session->current_trace_chunk = chunk;
+ chunk = NULL;
+end:
+ lttng_trace_chunk_put(chunk);
+ lttng_directory_handle_fini(&output_directory);
+ return ret;
+}
+
/*
* Create a new session by assigning a new session ID.
*
* Return allocated session or else NULL.
*/
struct relay_session *session_create(const char *session_name,
- const char *hostname, uint32_t live_timer,
- bool snapshot, uint32_t major, uint32_t minor)
+ const char *hostname, const char *base_path,
+ uint32_t live_timer,
+ bool snapshot,
+ const lttng_uuid sessiond_uuid,
+ const uint64_t *id_sessiond,
+ const uint64_t *current_chunk_id,
+ const time_t *creation_time,
+ uint32_t major,
+ uint32_t minor,
+ bool session_name_contains_creation_time)
{
- struct relay_session *session;
+ int ret;
+ struct relay_session *session = NULL;
+
+ if (session_name && strstr(session_name, ".")) {
+ ERR("Illegal character in session name: \"%s\"",
+ session_name);
+ goto error;
+ }
+ if (base_path && strstr(base_path, "../")) {
+ ERR("Invalid session base path walks up the path hierarchy: \"%s\"",
+ base_path);
+ goto error;
+ }
+ if (hostname && strstr(hostname, ".")) {
+ ERR("Invalid character in hostname: \"%s\"",
+ hostname);
+ goto error;
+ }
session = zmalloc(sizeof(*session));
if (!session) {
- PERROR("relay session zmalloc");
+ PERROR("Failed to allocate session");
goto error;
}
if (lttng_strncpy(session->session_name, session_name,
sizeof(session->session_name))) {
+ WARN("Session name exceeds maximal allowed length");
goto error;
}
if (lttng_strncpy(session->hostname, hostname,
sizeof(session->hostname))) {
+ WARN("Hostname exceeds maximal allowed length");
+ goto error;
+ }
+ if (lttng_strncpy(session->base_path, base_path,
+ sizeof(session->base_path))) {
+ WARN("Base path exceeds maximal allowed length");
goto error;
}
+ if (creation_time) {
+ LTTNG_OPTIONAL_SET(&session->creation_time, *creation_time);
+ }
+ session->session_name_contains_creation_time =
+ session_name_contains_creation_time;
+
session->ctf_traces_ht = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
if (!session->ctf_traces_ht) {
goto error;
urcu_ref_init(&session->ref);
CDS_INIT_LIST_HEAD(&session->recv_list);
pthread_mutex_init(&session->lock, NULL);
- pthread_mutex_init(&session->reflock, NULL);
pthread_mutex_init(&session->recv_list_lock, NULL);
session->live_timer = live_timer;
session->snapshot = snapshot;
+ lttng_uuid_copy(session->sessiond_uuid, sessiond_uuid);
+
+ if (id_sessiond) {
+ LTTNG_OPTIONAL_SET(&session->id_sessiond, *id_sessiond);
+ }
+
+ if (major == 2 && minor >= 11) {
+ /* Only applies for 2.11+ peers using trace chunks. */
+ ret = init_session_output_path(session);
+ if (ret) {
+ goto error;
+ }
+ }
+
+ ret = sessiond_trace_chunk_registry_session_created(
+ sessiond_trace_chunk_registry, sessiond_uuid);
+ if (ret) {
+ goto error;
+ }
+
+ if (id_sessiond && current_chunk_id) {
+ session->current_trace_chunk =
+ sessiond_trace_chunk_registry_get_chunk(
+ sessiond_trace_chunk_registry,
+ session->sessiond_uuid,
+ session->id_sessiond.value,
+ *current_chunk_id);
+ if (!session->current_trace_chunk) {
+ char uuid_str[UUID_STR_LEN];
+
+ lttng_uuid_to_str(sessiond_uuid, uuid_str);
+ ERR("Could not find trace chunk: sessiond = {%s}, sessiond session id = %" PRIu64 ", trace chunk id = %" PRIu64,
+ uuid_str, *id_sessiond,
+ *current_chunk_id);
+ }
+ } else if (!id_sessiond) {
+ /*
+ * Pre-2.11 peers will not announce trace chunks. An
+ * anonymous trace chunk which will remain set for the
+ * duration of the session is created.
+ */
+ ret = session_set_anonymous_chunk(session);
+ if (ret) {
+ goto error;
+ }
+ }
lttng_ht_add_unique_u64(sessions_ht, &session->session_n);
return session;
error:
- free(session);
+ session_put(session);
return NULL;
}
/* Should be called with RCU read-side lock held. */
bool session_get(struct relay_session *session)
{
- bool has_ref = false;
-
- pthread_mutex_lock(&session->reflock);
- if (session->ref.refcount != 0) {
- has_ref = true;
- urcu_ref_get(&session->ref);
- }
- pthread_mutex_unlock(&session->reflock);
-
- return has_ref;
+ return urcu_ref_get_unless_zero(&session->ref);
}
/*
ret = session_delete(session);
assert(!ret);
+ lttng_trace_chunk_put(session->current_trace_chunk);
+ session->current_trace_chunk = NULL;
+ lttng_trace_chunk_put(session->pending_closure_trace_chunk);
+ session->pending_closure_trace_chunk = NULL;
+ ret = sessiond_trace_chunk_registry_session_destroyed(
+ sessiond_trace_chunk_registry, session->sessiond_uuid);
+ assert(!ret);
call_rcu(&session->rcu_node, rcu_destroy_session);
}
void session_put(struct relay_session *session)
{
+ if (!session) {
+ return;
+ }
rcu_read_lock();
- pthread_mutex_lock(&session->reflock);
urcu_ref_put(&session->ref, session_release);
- pthread_mutex_unlock(&session->reflock);
rcu_read_unlock();
}
pthread_mutex_lock(&session->lock);
DBG("closing session %" PRIu64 ": is conn already closed %d",
session->id, session->connection_closed);
- if (session->connection_closed) {
- ret = -1;
- goto unlock;
- }
session->connection_closed = true;
-unlock:
pthread_mutex_unlock(&session->lock);
- if (ret) {
- return ret;
- }
rcu_read_lock();
cds_lfht_for_each_entry(session->ctf_traces_ht->ht,
pthread_mutex_lock(&session->lock);
DBG("aborting session %" PRIu64, session->id);
- if (session->aborted) {
- ERR("session %" PRIu64 " is already aborted", session->id);
- ret = -1;
- goto unlock;
- }
session->aborted = true;
-unlock:
pthread_mutex_unlock(&session->lock);
return ret;
}
}
rcu_read_unlock();
}
+
+int session_init_output_directory_handle(struct relay_session *session,
+ struct lttng_directory_handle *handle)
+{
+ int ret;
+ /*
+ * relayd_output_path/session_directory
+ * e.g. /home/user/lttng-traces/hostname/session_name
+ */
+ char *full_session_path = NULL;
+
+ pthread_mutex_lock(&session->lock);
+ full_session_path = create_output_path(session->output_path);
+ if (!full_session_path) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = utils_mkdir_recursive(
+ full_session_path, S_IRWXU | S_IRWXG, -1, -1);
+ if (ret) {
+ ERR("Failed to create session output path \"%s\"",
+ full_session_path);
+ goto end;
+ }
+
+ ret = lttng_directory_handle_init(handle, full_session_path);
+ if (ret) {
+ goto end;
+ }
+end:
+ pthread_mutex_unlock(&session->lock);
+ free(full_session_path);
+ return ret;
+}
projects / lttng-tools.git / blobdiff