Implement consumer ring buffer position sampling

[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 4d6838f6aff14636b5cd2db35a4f995f5fc839df..77bc2b1f12b8cf6c08a7fc402a953be4ce86a296 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.h
+++ b/src/bin/lttng-sessiond/consumer.h
@@ -18,9 +18,10 @@
 #ifndef _CONSUMER_H
 #define _CONSUMER_H
 
-#include <common/consumer.h>
+#include <common/consumer/consumer.h>
 #include <common/hashtable/hashtable.h>
 #include <lttng/lttng.h>
+#include <urcu/ref.h>
 
 #include "snapshot.h"
 
@@ -92,6 +93,11 @@ struct consumer_data {
        int err_sock;
        /* These two sockets uses the cmd_unix_sock_path. */
        int cmd_sock;
+       /*
+        * Write-end of the channel monitoring pipe to be passed to the
+        * consumer.
+        */
+       int channel_monitor_pipe;
        /*
         * The metadata socket object is handled differently and only created
         * locally in this object thus it's the only reference available in the
@@ -140,6 +146,8 @@ struct consumer_net {
  * Consumer output object describing where and how to send data.
  */
 struct consumer_output {
+       struct urcu_ref ref;    /* Refcount */
+
        /* If the consumer is enabled meaning that should be used */
        unsigned int enabled;
        enum consumer_dst_type type;
@@ -150,6 +158,9 @@ struct consumer_output {
         * index. The relayd sockets are index with it on the consumer side.
         */
        uint64_t net_seq_index;
+       /* Store the relay protocol in use if the session is remote. */
+       uint32_t relay_major_version;
+       uint32_t relay_minor_version;
 
        /*
         * Subdirectory path name used for both local and network consumer.
@@ -163,6 +174,9 @@ struct consumer_output {
         */
        struct lttng_ht *socks;
 
+       /* Tell if this output is used for snapshot. */
+       unsigned int snapshot:1;
+
        union {
                char trace_path[PATH_MAX];
                struct consumer_net net;
@@ -189,7 +203,8 @@ int consumer_socket_recv(struct consumer_socket *socket, void *msg,
 
 struct consumer_output *consumer_create_output(enum consumer_dst_type type);
 struct consumer_output *consumer_copy_output(struct consumer_output *obj);
-void consumer_destroy_output(struct consumer_output *obj);
+void consumer_output_get(struct consumer_output *obj);
+void consumer_output_put(struct consumer_output *obj);
 int consumer_set_network_uri(struct consumer_output *obj,
                struct lttng_uri *uri);
 int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd);
@@ -204,6 +219,8 @@ 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);
+int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
+               int pipe);
 int consumer_send_destroy_relayd(struct consumer_socket *sock,
                struct consumer_output *consumer);
 int consumer_recv_status_reply(struct consumer_socket *sock);
@@ -222,6 +239,7 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                unsigned int switch_timer_interval,
                unsigned int read_timer_interval,
                unsigned int live_timer_interval,
+               unsigned int monitor_timer_interval,
                int output,
                int type,
                uint64_t session_id,
@@ -237,12 +255,17 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t tracefile_count,
                uint64_t session_id_per_pid,
                unsigned int monitor,
-               uint32_t ust_app_uid);
+               uint32_t ust_app_uid,
+               const char *root_shm_path,
+               const char *shm_path);
 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg,
                enum lttng_consumer_command cmd,
                uint64_t channel_key,
                uint64_t stream_key,
                int 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);
 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                enum lttng_consumer_command cmd,
                uint64_t channel_key,
@@ -258,7 +281,8 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t tracefile_size,
                uint64_t tracefile_count,
                unsigned int monitor,
-               unsigned int live_timer_interval);
+               unsigned int live_timer_interval,
+               unsigned int monitor_timer_interval);
 int consumer_is_data_pending(uint64_t session_id,
                struct consumer_output *consumer);
 int consumer_close_metadata(struct consumer_socket *socket,
@@ -267,12 +291,17 @@ int consumer_setup_metadata(struct consumer_socket *socket,
                uint64_t metadata_key);
 int consumer_push_metadata(struct consumer_socket *socket,
                uint64_t metadata_key, char *metadata_str, size_t len,
-               size_t target_offset);
+               size_t target_offset, uint64_t version);
 int consumer_flush_channel(struct consumer_socket *socket, uint64_t key);
+int consumer_clear_quiescent_channel(struct consumer_socket *socket, uint64_t key);
+int consumer_get_discarded_events(uint64_t session_id, uint64_t channel_key,
+               struct consumer_output *consumer, uint64_t *discarded);
+int consumer_get_lost_packets(uint64_t session_id, uint64_t channel_key,
+               struct consumer_output *consumer, uint64_t *lost);
 
 /* Snapshot command. */
 int 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, int max_size_per_stream);
+               const char *session_path, int wait, uint64_t nb_packets_per_stream);
 
 #endif /* _CONSUMER_H */