sessiond: implement consumer clear channel

[lttng-tools.git] / src / bin / lttng-sessiond / consumer.h

diff --git a/src/bin/lttng-sessiond/consumer.h b/src/bin/lttng-sessiond/consumer.h
index 7277c405ec38bd0da71556a0c4a56c4035d47b6a..1844a1c695fce4e89808655309891c39dcbb817e 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.h
+++ b/src/bin/lttng-sessiond/consumer.h
@@ -34,6 +34,12 @@ enum consumer_dst_type {
        CONSUMER_DST_NET,
 };
 
+enum consumer_trace_chunk_exists_status {
+       CONSUMER_TRACE_CHUNK_EXISTS_STATUS_EXISTS_LOCAL,
+       CONSUMER_TRACE_CHUNK_EXISTS_STATUS_EXISTS_REMOTE,
+       CONSUMER_TRACE_CHUNK_EXISTS_STATUS_UNKNOWN_CHUNK,
+};
+
 struct consumer_socket {
        /*
         * File descriptor. This is just a reference to the consumer data meaning
@@ -146,9 +152,12 @@ struct consumer_output {
        uint32_t relay_major_version;
        uint32_t relay_minor_version;
 
+       /* True if relayd supports the clear feature. */
+       bool relay_allows_clear;
+
        /*
         * Subdirectory path name used for both local and network
-        * consumer ("/kernel", "/ust", or empty).
+        * consumer ("kernel", "ust", or empty).
         */
        char domain_subdir[max(sizeof(DEFAULT_KERNEL_TRACE_DIR),
                        sizeof(DEFAULT_UST_TRACE_DIR))];
@@ -176,9 +185,9 @@ struct consumer_output {
 };
 
 struct consumer_socket *consumer_find_socket(int key,
-               struct consumer_output *consumer);
+               const struct consumer_output *consumer);
 struct consumer_socket *consumer_find_socket_by_bitness(int bits,
-               struct consumer_output *consumer);
+               const struct consumer_output *consumer);
 struct consumer_socket *consumer_allocate_socket(int *fd);
 void consumer_add_socket(struct consumer_socket *sock,
                struct consumer_output *consumer);
@@ -212,7 +221,10 @@ int consumer_send_channel(struct consumer_socket *sock,
 int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
                struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
                enum lttng_stream_type type, uint64_t session_id,
-               char *session_name, char *hostname, int session_live_timer);
+               const char *session_name, const char *hostname,
+               const char *base_path, int session_live_timer,
+               const uint64_t *current_chunk_id, time_t session_creation_time,
+               bool session_name_contains_creation_time);
 int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
                int pipe);
 int consumer_send_destroy_relayd(struct consumer_socket *sock,
@@ -237,8 +249,6 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t session_id,
                const char *pathname,
                const char *name,
-               uid_t uid,
-               gid_t gid,
                uint64_t relayd_id,
                uint64_t key,
                unsigned char *uuid,
@@ -251,12 +261,12 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                int64_t blocking_timeout,
                const char *root_shm_path,
                const char *shm_path,
-               uint64_t trace_archive_id);
+               struct lttng_trace_chunk *trace_chunk,
+               const struct lttng_credentials *buffer_credentials);
 void consumer_init_add_stream_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t channel_key,
                uint64_t stream_key,
-               int32_t cpu,
-               uint64_t trace_archive_id);
+               int32_t cpu);
 void consumer_init_streams_sent_comm_msg(struct lttcomm_consumer_msg *msg,
                enum lttng_consumer_command cmd,
                uint64_t channel_key, uint64_t net_seq_idx);
@@ -275,7 +285,8 @@ void consumer_init_add_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t tracefile_count,
                unsigned int monitor,
                unsigned int live_timer_interval,
-               unsigned int monitor_timer_interval);
+               unsigned int monitor_timer_interval,
+               struct lttng_trace_chunk *trace_chunk);
 int consumer_is_data_pending(uint64_t session_id,
                struct consumer_output *consumer);
 int consumer_close_metadata(struct consumer_socket *socket,
@@ -294,25 +305,34 @@ int consumer_get_lost_packets(uint64_t session_id, uint64_t channel_key,
 
 /* Snapshot command. */
 enum lttng_error_code consumer_snapshot_channel(struct consumer_socket *socket,
-               uint64_t key, struct snapshot_output *output, int metadata,
-               uid_t uid, gid_t gid, const char *session_path, int wait,
-               uint64_t nb_packets_per_stream, uint64_t trace_archive_id);
+               uint64_t key, const struct consumer_output *output, int metadata,
+               uid_t uid, gid_t gid, const char *channel_path, int wait,
+               uint64_t nb_packets_per_stream);
 
 /* Rotation commands. */
 int consumer_rotate_channel(struct consumer_socket *socket, uint64_t key,
                uid_t uid, gid_t gid, struct consumer_output *output,
-               const char *domain_path, bool is_metadata_channel,
-               uint64_t new_chunk_id);
-int consumer_rotate_rename(struct consumer_socket *socket, uint64_t session_id,
-               const struct consumer_output *output, const char *old_path,
-               const char *new_path, uid_t uid, gid_t gid);
-int consumer_check_rotation_pending_local(struct consumer_socket *socket,
-               uint64_t session_id, uint64_t chunk_id);
-int consumer_check_rotation_pending_relay(struct consumer_socket *socket,
-               const struct consumer_output *output, uint64_t session_id,
-               uint64_t chunk_id);
-int consumer_mkdir(struct consumer_socket *socket, uint64_t session_id,
-               const struct consumer_output *output, const char *path,
-               uid_t uid, gid_t gid);
+               bool is_metadata_channel);
+int consumer_init(struct consumer_socket *socket,
+               const lttng_uuid sessiond_uuid);
+
+int consumer_create_trace_chunk(struct consumer_socket *socket,
+               uint64_t relayd_id, uint64_t session_id,
+               struct lttng_trace_chunk *chunk,
+               const char *domain_subdir);
+int consumer_close_trace_chunk(struct consumer_socket *socket,
+               uint64_t relayd_id, uint64_t session_id,
+               struct lttng_trace_chunk *chunk,
+               char *closed_trace_chunk_path);
+int consumer_trace_chunk_exists(struct consumer_socket *socket,
+               uint64_t relayd_id, uint64_t session_id,
+               struct lttng_trace_chunk *chunk,
+               enum consumer_trace_chunk_exists_status *result);
+
+char *setup_channel_trace_path(struct consumer_output *consumer,
+               const char *session_path, size_t *consumer_path_offset);
+
+/* Clear command */
+int consumer_clear_channel(struct consumer_socket *socket, uint64_t key);
 
 #endif /* _CONSUMER_H */