#include <common/hashtable/hashtable.h>
#include <lttng/rotation.h>
#include <lttng/location.h>
+#include <lttng/lttng-error.h>
#include "snapshot.h"
#include "trace-kernel.h"
* iterate or/and do any actions on that list.
*/
pthread_mutex_t lock;
+ /*
+ * This condition variable is signaled on every removal from
+ * the session list.
+ */
+ pthread_cond_t removal_cond;
/*
* Session unique ID generator. The session list lock MUST be
*/
struct ltt_session {
char name[NAME_MAX];
+ bool has_auto_generated_name;
char hostname[HOST_NAME_MAX]; /* Local hostname. */
+ time_t creation_time;
struct ltt_kernel_session *kernel_session;
struct ltt_ust_session *ust_session;
+ struct urcu_ref ref;
/*
* Protect any read/write on this session data structure. This lock must be
* acquired *before* using any public functions declared below. Use
pthread_mutex_t lock;
struct cds_list_head list;
uint64_t id; /* session unique identifier */
+ /* Indicates if the session has been added to the session list and ht.*/
+ bool published;
+ /* Indicates if a destroy command has been applied to this session. */
+ bool destroyed;
/* UID/GID of the user owning the session */
uid_t uid;
gid_t gid;
* copied into those sessions.
*/
struct consumer_output *consumer;
-
+ /*
+ * Indicates whether or not the user has specified an output directory
+ * or if it was configured using the default configuration.
+ */
+ bool has_user_specified_directory;
/* Did at least ONE start command has been triggered?. */
unsigned int has_been_started:1;
/*
/* Indicate if the session has to output the traces or not. */
unsigned int output_traces;
/*
- * This session is in snapshot mode. This means that every channel enabled
- * will be set in overwrite mode and mmap. It is considered exclusively for
- * snapshot purposes.
+ * This session is in snapshot mode. This means that channels enabled
+ * will be set in overwrite mode by default and must be in mmap
+ * output mode. Note that snapshots can be taken on a session that
+ * is not in "snapshot_mode". This parameter only affects channel
+ * creation defaults.
*/
unsigned int snapshot_mode;
+ /*
+ * A session that has channels that don't use 'mmap' output can't be
+ * used to capture snapshots. This is set to true whenever a
+ * 'splice' kernel channel is enabled.
+ */
+ bool has_non_mmap_channel;
/*
* Timer set when the session is created for live reading.
*/
struct lttng_ht_node_u64 node;
/*
* The current archive id corresponds to the number of session rotations
- * that have occured for this session. The archive id
+ * that have occurred for this session. The archive id
* is used to tag the "generation" of a stream. This tag allows the
* consumer and relay daemons to track when a given stream was created
* during the lifetime of a session.
/*
* Keep a state if this session was rotated after the last stop command.
* We only allow one rotation after a stop. At destroy, we also need to
- * know if a rotation occured since the last stop to rename the current
+ * know if a rotation occurred since the last stop to rename the current
* chunk.
*/
bool rotated_after_last_stop;
*/
struct lttng_condition *rotate_condition;
struct lttng_trigger *rotate_trigger;
+ LTTNG_OPTIONAL(uint64_t) last_trace_chunk_id;
+ struct lttng_trace_chunk *current_trace_chunk;
};
/* Prototypes */
-int session_create(char *name, uid_t uid, gid_t gid);
-int session_destroy(struct ltt_session *session);
-
+enum lttng_error_code session_create(const char *name, uid_t uid, gid_t gid,
+ struct ltt_session **out_session);
void session_lock(struct ltt_session *session);
void session_lock_list(void);
int session_trylock_list(void);
void session_unlock(struct ltt_session *session);
void session_unlock_list(void);
+void session_destroy(struct ltt_session *session);
+
+bool session_get(struct ltt_session *session);
+void session_put(struct ltt_session *session);
+
enum consumer_dst_type session_get_consumer_destination_type(
const struct ltt_session *session);
const char *session_get_net_consumer_hostname(
struct ltt_session *session_find_by_name(const char *name);
struct ltt_session *session_find_by_id(uint64_t id);
+
struct ltt_session_list *session_get_list(void);
+void session_list_wait_empty(void);
int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid);
+int session_reset_rotation_state(struct ltt_session *session,
+ enum lttng_rotation_state result);
+
+enum lttng_error_code session_switch_trace_chunk(struct ltt_session *session,
+ const char *session_base_path_override,
+ const char *chunk_name_override);
+int session_set_trace_chunk(struct ltt_session *session,
+ struct lttng_trace_chunk *current_trace_chunk);
+
#endif /* _LTT_SESSION_H */