X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconsumer.h;h=ac3b4903f6b8c3e945432b35a471100a8998aede;hp=d0986ef1e3203a420f2054b75da65ab94cdfcd77;hb=b83e03c49920557f292d3861f42d0109e6fa03ea;hpb=6dc3064a30b0cc7cfa9fdd22da1963525dfb7388 diff --git a/src/common/consumer.h b/src/common/consumer.h index d0986ef1e..ac3b4903f 100644 --- a/src/common/consumer.h +++ b/src/common/consumer.h @@ -32,6 +32,7 @@ #include #include #include +#include /* Commands for consumer */ enum lttng_consumer_command { @@ -40,7 +41,7 @@ enum lttng_consumer_command { /* pause, delete, active depending on fd state */ LTTNG_CONSUMER_UPDATE_STREAM, /* inform the consumer to quit when all fd has hang up */ - LTTNG_CONSUMER_STOP, + LTTNG_CONSUMER_STOP, /* deprecated */ LTTNG_CONSUMER_ADD_RELAYD_SOCKET, /* Inform the consumer to kill a specific relayd connection */ LTTNG_CONSUMER_DESTROY_RELAYD, @@ -56,6 +57,7 @@ enum lttng_consumer_command { LTTNG_CONSUMER_FLUSH_CHANNEL, LTTNG_CONSUMER_SNAPSHOT_CHANNEL, LTTNG_CONSUMER_SNAPSHOT_METADATA, + LTTNG_CONSUMER_STREAMS_SENT, }; /* State of each fd in consumer */ @@ -106,15 +108,20 @@ struct lttng_consumer_channel { int refcount; /* Tracing session id on the session daemon side. */ uint64_t session_id; + /* + * Session id when requesting metadata to the session daemon for + * a session with per-PID buffers. + */ + uint64_t session_id_per_pid; /* Channel trace file path name. */ char pathname[PATH_MAX]; /* Channel name. */ char name[LTTNG_SYMBOL_NAME_LEN]; - /* UID and GID of the channel. */ + /* UID and GID of the session owning this channel. */ uid_t uid; gid_t gid; - /* Relayd id of the channel. -1 if it does not apply. */ - int64_t relayd_id; + /* Relayd id of the channel. -1ULL if it does not apply. */ + uint64_t relayd_id; /* * Number of streams NOT initialized yet. This is used in order to not * delete this channel if streams are getting initialized. @@ -126,6 +133,7 @@ struct lttng_consumer_channel { enum consumer_channel_type type; /* For UST */ + uid_t ust_app_uid; /* Application UID. */ struct ustctl_consumer_channel *uchan; unsigned char uuid[UUID_STR_LEN]; /* @@ -134,6 +142,7 @@ struct lttng_consumer_channel { * LTTNG_CONSUMER_GET_CHANNEL. */ struct stream_list streams; + /* * Set if the channel is metadata. We keep a reference to the stream * because we have to flush data once pushed by the session daemon. For a @@ -148,14 +157,60 @@ struct lttng_consumer_channel { /* Metadata cache is metadata channel */ struct consumer_metadata_cache *metadata_cache; - /* For metadata periodical flush */ + /* For UST metadata periodical flush */ int switch_timer_enabled; timer_t switch_timer; int switch_timer_error; + /* For the live mode */ + int live_timer_enabled; + timer_t live_timer; + int live_timer_error; + /* On-disk circular buffer */ uint64_t tracefile_size; uint64_t tracefile_count; + /* + * Monitor or not the streams of this channel meaning this indicates if the + * streams should be sent to the data/metadata thread or added to the no + * monitor list of the channel. + */ + unsigned int monitor; + + /* + * Channel lock. + * + * This lock protects against concurrent update of channel. + * + * This is nested INSIDE the consumer data lock. + * This is nested OUTSIDE the channel timer lock. + * This is nested OUTSIDE the metadata cache lock. + * This is nested OUTSIDE stream lock. + * This is nested OUTSIDE consumer_relayd_sock_pair lock. + */ + pthread_mutex_t lock; + + /* + * Channel teardown lock. + * + * This lock protect against teardown of channel. It is _never_ + * taken by the timer handler. + * + * This is nested INSIDE the consumer data lock. + * This is nested INSIDE the channel lock. + * This is nested OUTSIDE the metadata cache lock. + * This is nested OUTSIDE stream lock. + * This is nested OUTSIDE consumer_relayd_sock_pair lock. + */ + pthread_mutex_t timer_lock; + + /* Timer value in usec for live streaming. */ + unsigned int live_timer_interval; + + int *stream_fds; + int nr_stream_fds; + char root_shm_path[PATH_MAX]; + char shm_path[PATH_MAX]; }; /* @@ -181,10 +236,27 @@ struct lttng_consumer_stream { int out_fd; /* output file to write the data */ /* Write position in the output file descriptor */ off_t out_fd_offset; + /* Amount of bytes written to the output */ + uint64_t output_written; enum lttng_consumer_stream_state state; int shm_fd_is_copy; int data_read; int hangup_flush_done; + + /* + * metadata_timer_lock protects flags waiting_on_metadata and + * missed_metadata_flush. + */ + pthread_mutex_t metadata_timer_lock; + /* + * Flag set when awaiting metadata to be pushed. Used in the + * timer thread to skip waiting on the stream (and stream lock) to + * ensure we can proceed to flushing metadata in live mode. + */ + bool waiting_on_metadata; + /* Raised when a timer misses a metadata flush. */ + bool missed_metadata_flush; + enum lttng_event_output output; /* Maximum subbuffer size. */ unsigned long max_sb_size; @@ -204,6 +276,14 @@ struct lttng_consumer_stream { gid_t gid; /* Network sequence number. Indicating on which relayd socket it goes. */ uint64_t net_seq_idx; + /* + * Indicate if this stream was successfully sent to a relayd. This is set + * after the refcount of the relayd is incremented and is checked when the + * stream is closed before decrementing the refcount in order to avoid an + * unbalanced state. + */ + unsigned int sent_to_relayd; + /* Identify if the stream is the metadata */ unsigned int metadata_flag; /* Used when the stream is set for network streaming */ @@ -227,6 +307,8 @@ struct lttng_consumer_stream { * * This is nested INSIDE the consumer_data lock. * This is nested INSIDE the metadata cache lock. + * This is nested INSIDE the channel lock. + * This is nested INSIDE the channel timer lock. * This is nested OUTSIDE consumer_relayd_sock_pair lock. */ pthread_mutex_t lock; @@ -247,6 +329,46 @@ struct lttng_consumer_stream { /* On-disk circular buffer */ uint64_t tracefile_size_current; uint64_t tracefile_count_current; + /* + * Monitor or not the streams of this channel meaning this indicates if the + * streams should be sent to the data/metadata thread or added to the no + * monitor list of the channel. + */ + unsigned int monitor; + /* + * Indicate if the stream is globally visible meaning that it has been + * added to the multiple hash tables. If *not* set, NO lock should be + * acquired in the destroy path. + */ + unsigned int globally_visible; + /* + * Pipe to wake up the metadata poll thread when the UST metadata + * cache is updated. + */ + int ust_metadata_poll_pipe[2]; + /* + * How much metadata was read from the metadata cache and sent + * to the channel. + */ + uint64_t ust_metadata_pushed; + /* + * FD of the index file for this stream. + */ + int index_fd; + + /* + * Local pipe to extract data when using splice. + */ + int splice_pipe[2]; + + /* + * Rendez-vous point between data and metadata stream in live mode. + */ + pthread_cond_t metadata_rdv; + pthread_mutex_t metadata_rdv_lock; + + /* Indicate if the stream still has some data to be read. */ + unsigned int has_data:1; }; /* @@ -254,7 +376,7 @@ struct lttng_consumer_stream { */ struct consumer_relayd_sock_pair { /* Network sequence number. */ - int64_t net_seq_idx; + uint64_t net_seq_idx; /* Number of stream associated with this relayd */ unsigned int refcount; @@ -339,20 +461,37 @@ struct lttng_consumer_local_data { * == 0 (success, FD is left to library) * < 0 (error) */ - int (*on_update_stream)(int sessiond_key, uint32_t state); + int (*on_update_stream)(uint64_t sessiond_key, uint32_t state); enum lttng_consumer_type type; /* socket to communicate errors with sessiond */ int consumer_error_socket; - /* socket to ask metadata to sessiond */ + /* socket to ask metadata to sessiond. */ int consumer_metadata_socket; + /* + * Protect consumer_metadata_socket. + * + * This is nested OUTSIDE the metadata cache lock. + */ + pthread_mutex_t metadata_socket_lock; /* socket to exchange commands with sessiond */ char *consumer_command_sock_path; /* communication with splice */ - int consumer_thread_pipe[2]; int consumer_channel_pipe[2]; - int consumer_splice_metadata_pipe[2]; /* Data stream poll thread pipe. To transfer data stream to the thread */ struct lttng_pipe *consumer_data_pipe; + + /* + * Data thread use that pipe to catch wakeup from read subbuffer that + * detects that there is still data to be read for the stream encountered. + * Before doing so, the stream is flagged to indicate that there is still + * data to be read. + * + * Both pipes (read/write) are owned and used inside the data thread. + */ + struct lttng_pipe *consumer_wakeup_pipe; + /* Indicate if the wakeup thread has been notified. */ + unsigned int has_wakeup:1; + /* to let the signal handler wake up the fd receiver thread */ int consumer_should_quit[2]; /* Metadata poll thread pipe. Transfer metadata stream to it */ @@ -412,7 +551,7 @@ struct lttng_consumer_global_data { /* * Init consumer data structures. */ -void lttng_consumer_init(void); +int lttng_consumer_init(void); /* * Set the error socket for communication with a session daemon. @@ -466,7 +605,8 @@ struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, uint64_t session_id, int cpu, int *alloc_ret, - enum consumer_channel_type type); + enum consumer_channel_type type, + unsigned int monitor); struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, uint64_t session_id, const char *pathname, @@ -476,7 +616,12 @@ struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, uint64_t relayd_id, enum lttng_event_output output, uint64_t tracefile_size, - uint64_t tracefile_count); + uint64_t tracefile_count, + uint64_t session_id_per_pid, + unsigned int monitor, + unsigned int live_timer_interval, + const char *root_shm_path, + const char *shm_path); void consumer_del_stream(struct lttng_consumer_stream *stream, struct lttng_ht *ht); void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, @@ -487,8 +632,11 @@ void consumer_del_channel(struct lttng_consumer_channel *channel); /* lttng-relayd consumer command */ struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair( - int net_seq_idx); + uint64_t net_seq_idx); struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key); +int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, char *path); +int consumer_send_relayd_streams_sent(uint64_t net_seq_idx); +void close_relayd_stream(struct lttng_consumer_stream *stream); struct lttng_consumer_channel *consumer_find_channel(uint64_t key); int consumer_handle_stream_before_relayd(struct lttng_consumer_stream *stream, size_t data_size); @@ -500,19 +648,23 @@ struct lttng_consumer_local_data *lttng_consumer_create( struct lttng_consumer_local_data *ctx), int (*recv_channel)(struct lttng_consumer_channel *channel), int (*recv_stream)(struct lttng_consumer_stream *stream), - int (*update_stream)(int sessiond_key, uint32_t state)); + int (*update_stream)(uint64_t sessiond_key, uint32_t state)); void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx); ssize_t lttng_consumer_on_read_subbuffer_mmap( struct lttng_consumer_local_data *ctx, struct lttng_consumer_stream *stream, unsigned long len, - unsigned long padding); + unsigned long padding, + struct ctf_packet_index *index); ssize_t lttng_consumer_on_read_subbuffer_splice( struct lttng_consumer_local_data *ctx, struct lttng_consumer_stream *stream, unsigned long len, - unsigned long padding); + unsigned long padding, + struct ctf_packet_index *index); int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream); int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, unsigned long *pos); +int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream); +int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream); void *consumer_thread_metadata_poll(void *data); void *consumer_thread_data_poll(void *data); void *consumer_thread_sessiond_poll(void *data); @@ -523,10 +675,10 @@ int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, struct lttng_consumer_local_data *ctx); int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream); -int consumer_add_relayd_socket(int net_seq_idx, int sock_type, +int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, struct lttng_consumer_local_data *ctx, int sock, struct pollfd *consumer_sockpoll, struct lttcomm_relayd_sock *relayd_sock, - unsigned int sessiond_id); + uint64_t sessiond_id, uint64_t relayd_session_id); void consumer_flag_relayd_for_destroy( struct consumer_relayd_sock_pair *relayd); int consumer_data_pending(uint64_t id); @@ -536,5 +688,13 @@ int consumer_send_status_channel(int sock, void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, uint64_t key); void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd); +unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos, + unsigned long produced_pos, uint64_t nb_packets_per_stream, + uint64_t max_sb_size); +int consumer_add_data_stream(struct lttng_consumer_stream *stream); +void consumer_del_stream_for_data(struct lttng_consumer_stream *stream); +int consumer_add_metadata_stream(struct lttng_consumer_stream *stream); +void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream); +int consumer_create_index_file(struct lttng_consumer_stream *stream); #endif /* LIB_CONSUMER_H */