X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconsumer%2Fconsumer.h;h=000040982d5dfb4bba6abaa2bb2a6a9e1f3d5b75;hp=acdc4b839701c324e0d7887798fcd37ff7ec4890;hb=a2814ea7573bf5edd5323d6f89c48ff14105db69;hpb=97056403bdb7c18abe9c1e8e0824e3a64123c4c2 diff --git a/src/common/consumer/consumer.h b/src/common/consumer/consumer.h index acdc4b839..000040982 100644 --- a/src/common/consumer/consumer.h +++ b/src/common/consumer/consumer.h @@ -1,20 +1,11 @@ /* - * Copyright (C) 2011 - Julien Desfossez - * Mathieu Desnoyers - * 2012 - David Goulet + * Copyright (C) 2011 Julien Desfossez + * Copyright (C) 2011 Mathieu Desnoyers + * Copyright (C) 2012 David Goulet + * Copyright (C) 2018 Jérémie Galarneau * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2 only, - * as published by the Free Software Foundation. + * SPDX-License-Identifier: GPL-2.0-only * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef LIB_CONSUMER_H @@ -29,10 +20,13 @@ #include #include -#include +#include #include #include #include +#include +#include +#include /* Commands for consumer */ enum lttng_consumer_command { @@ -62,18 +56,12 @@ enum lttng_consumer_command { LTTNG_CONSUMER_LOST_PACKETS, LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL, LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE, - LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE, LTTNG_CONSUMER_ROTATE_CHANNEL, - LTTNG_CONSUMER_ROTATE_RENAME, - LTTNG_CONSUMER_ROTATE_PENDING_RELAY, - LTTNG_CONSUMER_MKDIR, -}; - -/* State of each fd in consumer */ -enum lttng_consumer_stream_state { - LTTNG_CONSUMER_ACTIVE_STREAM, - LTTNG_CONSUMER_PAUSE_STREAM, - LTTNG_CONSUMER_DELETE_STREAM, + LTTNG_CONSUMER_INIT, + LTTNG_CONSUMER_CREATE_TRACE_CHUNK, + LTTNG_CONSUMER_CLOSE_TRACE_CHUNK, + LTTNG_CONSUMER_TRACE_CHUNK_EXISTS, + LTTNG_CONSUMER_CLEAR_CHANNEL, }; enum lttng_consumer_type { @@ -109,26 +97,45 @@ struct stream_list { struct consumer_metadata_cache; struct lttng_consumer_channel { + /* Is the channel published in the channel hash tables? */ + bool is_published; + /* + * Was the channel deleted (logically) and waiting to be reclaimed? + * If this flag is set, no modification that is not cleaned-up by the + * RCU reclamation callback should be made + */ + bool is_deleted; /* HT node used for consumer_data.channel_ht */ struct lttng_ht_node_u64 node; + /* HT node used for consumer_data.channels_by_session_id_ht */ + struct lttng_ht_node_u64 channels_by_session_id_ht_node; /* Indexed key. Incremented value in the consumer. */ uint64_t key; /* Number of streams referencing this channel */ int refcount; /* Tracing session id on the session daemon side. */ uint64_t session_id; + /* Current trace chunk of the session in which this channel exists. */ + struct lttng_trace_chunk *trace_chunk; /* * 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. */ + /* + * In the case of local streams, this field contains the channel's + * output path; a path relative to the session's output path. + * e.g. ust/uid/1000/64-bit + * + * In the case of remote streams, the contents of this field depends + * on the version of the relay daemon peer. For 2.11+ peers, the + * contents are the same as in the local case. However, for legacy + * peers, this contains a path of the form: + * /hostname/session_path/ust/uid/1000/64-bit + */ char pathname[PATH_MAX]; /* Channel name. */ char name[LTTNG_SYMBOL_NAME_LEN]; - /* UID and GID of the session owning this channel. */ - uid_t uid; - gid_t gid; /* Relayd id of the channel. -1ULL if it does not apply. */ uint64_t relayd_id; /* @@ -144,7 +151,7 @@ struct lttng_consumer_channel { /* For UST */ uid_t ust_app_uid; /* Application UID. */ struct ustctl_consumer_channel *uchan; - unsigned char uuid[UUID_STR_LEN]; + unsigned char uuid[LTTNG_UUID_STR_LEN]; /* * Temporary stream list used to store the streams once created and waiting * to be sent to the session daemon by receiving the @@ -176,6 +183,8 @@ struct lttng_consumer_channel { int live_timer_enabled; timer_t live_timer; int live_timer_error; + /* Channel is part of a live session ? */ + bool is_live; /* For channel monitoring timer. */ int monitor_timer_enabled; @@ -225,26 +234,14 @@ struct lttng_consumer_channel { int nr_stream_fds; char root_shm_path[PATH_MAX]; char shm_path[PATH_MAX]; + /* Only set for UST channels. */ + LTTNG_OPTIONAL(struct lttng_credentials) buffer_credentials; /* Total number of discarded events for that channel. */ uint64_t discarded_events; /* Total number of missed packets due to overwriting (overwrite). */ uint64_t lost_packets; bool streams_sent_to_relayd; - - /* - * Account how many streams are waiting for their rotation to be - * complete. When this number reaches 0, we inform the session - * daemon that this channel has finished its rotation. - */ - uint64_t nr_stream_rotate_pending; - - /* - * The chunk id where we currently write the data. This value is sent - * to the relay when we add a stream and when a stream rotates. This - * allows to keep track of where each stream on the relay is writing. - */ - uint64_t current_chunk_id; }; /* @@ -260,6 +257,12 @@ struct lttng_consumer_stream { struct lttng_ht_node_u64 node_session_id; /* Pointer to associated channel. */ struct lttng_consumer_channel *chan; + /* + * Current trace chunk. Holds a reference to the trace chunk. + * `chunk` can be NULL when a stream is not associated to a chunk, e.g. + * when it was created in the context of a no-output session. + */ + struct lttng_trace_chunk *trace_chunk; /* Key by which the stream is indexed for 'node'. */ uint64_t key; @@ -272,7 +275,6 @@ struct lttng_consumer_stream { 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; @@ -296,6 +298,11 @@ struct lttng_consumer_stream { */ bool quiescent; + /* + * True if the sequence number is not available (lttng-modules < 2.8). + */ + bool sequence_number_unavailable; + /* * metadata_timer_lock protects flags waiting_on_metadata and * missed_metadata_flush. @@ -311,7 +318,7 @@ struct lttng_consumer_stream { bool missed_metadata_flush; enum lttng_event_output output; - /* Maximum subbuffer size. */ + /* Maximum subbuffer size (in bytes). */ unsigned long max_sb_size; /* @@ -324,9 +331,6 @@ struct lttng_consumer_stream { /* For UST */ int wait_fd; - /* UID/GID of the user owning the session to which stream belongs */ - uid_t uid; - gid_t gid; /* Network sequence number. Indicating on which relayd socket it goes. */ uint64_t net_seq_idx; /* @@ -433,12 +437,12 @@ struct lttng_consumer_stream { pthread_mutex_t metadata_rdv_lock; /* - * rotate_position represents the position in the ring-buffer that has to - * be flushed to disk to complete the ongoing rotation. When that position - * is reached, this tracefile can be closed and a new one is created in - * channel_read_only_attributes.path. + * rotate_position represents the packet sequence number of the last + * packet which belongs to the current trace chunk prior to the rotation. + * When that position is reached, this tracefile can be closed and a + * new one is created in channel_read_only_attributes.path. */ - unsigned long rotate_position; + uint64_t rotate_position; /* * Read-only copies of channel values. We cannot safely access the @@ -447,7 +451,6 @@ struct lttng_consumer_stream { * the stream objects when we introduce refcounting. */ struct { - char path[LTTNG_PATH_MAX]; uint64_t tracefile_size; } channel_read_only_attributes; @@ -507,6 +510,7 @@ struct consumer_relayd_sock_pair { /* Session id on both sides for the sockets. */ uint64_t relayd_session_id; uint64_t sessiond_session_id; + struct lttng_consumer_local_data *ctx; }; /* @@ -596,11 +600,7 @@ struct lttng_consumer_local_data { * to the session daemon (write-only). */ int channel_monitor_pipe; - /* - * Pipe used to inform the session daemon that a stream has finished - * its rotation (write-only). - */ - int channel_rotate_pipe; + LTTNG_OPTIONAL(lttng_uuid) sessiond_uuid; }; /* @@ -625,6 +625,8 @@ struct lttng_consumer_global_data { /* Channel hash table protected by consumer_data.lock. */ struct lttng_ht *channel_ht; + /* Channel hash table indexed by session id. */ + struct lttng_ht *channels_by_session_id_ht; /* * Flag specifying if the local array of FDs needs update in the * poll function. Protected by consumer_data.lock. @@ -651,6 +653,11 @@ struct lttng_consumer_global_data { * This HT uses the "node_channel_id" of the consumer stream. */ struct lttng_ht *stream_per_chan_id_ht; + + /* + * Trace chunk registry indexed by (session_id, chunk_id). + */ + struct lttng_trace_chunk_registry *chunk_registry; }; /* @@ -668,6 +675,24 @@ extern int consumer_quit; /* Flag used to temporarily pause data consumption from testpoints. */ extern int data_consumption_paused; +/* Return a human-readable consumer type string that is suitable for logging. */ +static inline +const char *lttng_consumer_type_str(enum lttng_consumer_type type) +{ + switch (type) { + case LTTNG_CONSUMER_UNKNOWN: + return "unknown"; + case LTTNG_CONSUMER_KERNEL: + return "kernel"; + case LTTNG_CONSUMER32_UST: + return "32-bit user space"; + case LTTNG_CONSUMER64_UST: + return "64-bit user space"; + default: + abort(); + } +} + /* * Init consumer data structures. */ @@ -717,24 +742,23 @@ void consumer_stream_update_channel_attributes( struct lttng_consumer_stream *stream, struct lttng_consumer_channel *channel); -struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, +struct lttng_consumer_stream *consumer_allocate_stream( + struct lttng_consumer_channel *channel, + uint64_t channel_key, uint64_t stream_key, - enum lttng_consumer_stream_state state, const char *channel_name, - uid_t uid, - gid_t gid, uint64_t relayd_id, uint64_t session_id, + struct lttng_trace_chunk *trace_chunk, int cpu, int *alloc_ret, enum consumer_channel_type type, unsigned int monitor); struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, uint64_t session_id, + const uint64_t *chunk_id, const char *pathname, const char *name, - uid_t uid, - gid_t gid, uint64_t relayd_id, enum lttng_event_output output, uint64_t tracefile_size, @@ -742,6 +766,7 @@ struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, uint64_t session_id_per_pid, unsigned int monitor, unsigned int live_timer_interval, + bool is_in_live_session, const char *root_shm_path, const char *shm_path); void consumer_del_stream(struct lttng_consumer_stream *stream, @@ -772,7 +797,8 @@ struct lttng_consumer_local_data *lttng_consumer_create( 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, + struct lttng_consumer_stream *stream, + const struct lttng_buffer_view *buffer, unsigned long padding, struct ctf_packet_index *index); ssize_t lttng_consumer_on_read_subbuffer_splice( @@ -819,20 +845,34 @@ void consumer_del_stream_for_data(struct lttng_consumer_stream *stream); void 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); -int lttng_consumer_rotate_channel(uint64_t key, const char *path, - uint64_t relayd_id, uint32_t metadata, - uint64_t new_chunk_id, struct lttng_consumer_local_data *ctx); +int lttng_consumer_rotate_channel(struct lttng_consumer_channel *channel, + uint64_t key, uint64_t relayd_id, uint32_t metadata, + struct lttng_consumer_local_data *ctx); int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream); int lttng_consumer_rotate_stream(struct lttng_consumer_local_data *ctx, - struct lttng_consumer_stream *stream, bool *rotated); -int lttng_consumer_rotate_ready_streams(uint64_t key, - struct lttng_consumer_local_data *ctx); -int lttng_consumer_rotate_rename(const char *current_path, const char *new_path, - uid_t uid, gid_t gid, uint64_t relayd_id); -int lttng_consumer_rotate_pending_relay( uint64_t session_id, - uint64_t relayd_id, uint64_t chunk_id); + struct lttng_consumer_stream *stream); +int lttng_consumer_rotate_ready_streams(struct lttng_consumer_channel *channel, + uint64_t key, struct lttng_consumer_local_data *ctx); void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream); -int lttng_consumer_mkdir(const char *path, uid_t uid, gid_t gid, - uint64_t relayd_id); +enum lttcomm_return_code lttng_consumer_create_trace_chunk( + const uint64_t *relayd_id, uint64_t session_id, + uint64_t chunk_id, + time_t chunk_creation_timestamp, + const char *chunk_override_name, + const struct lttng_credentials *credentials, + struct lttng_directory_handle *chunk_directory_handle); +enum lttcomm_return_code lttng_consumer_close_trace_chunk( + const uint64_t *relayd_id, uint64_t session_id, + uint64_t chunk_id, time_t chunk_close_timestamp, + const enum lttng_trace_chunk_command_type *close_command, + char *path); +enum lttcomm_return_code lttng_consumer_trace_chunk_exists( + const uint64_t *relayd_id, uint64_t session_id, + uint64_t chunk_id); +void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair *relayd); +enum lttcomm_return_code lttng_consumer_init_command( + struct lttng_consumer_local_data *ctx, + const lttng_uuid sessiond_uuid); +int lttng_consumer_clear_channel(struct lttng_consumer_channel *channel); #endif /* LIB_CONSUMER_H */