src/bin/lttng-sessiond/cmd.h

   1 /*
   2  * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef CMD_H
   9 #define CMD_H
  10
  11 #include "context.h"
  12 #include "lttng-sessiond.h"
  13 #include "lttng/tracker.h"
  14 #include "session.h"
  15 #include <common/tracker.h>
  16
  17 struct notification_thread_handle;
  18 struct lttng_dynamic_buffer;
  19
  20 /*
  21  * A callback (and associated user data) that should be run after a command
  22  * has been executed. No locks should be taken while executing this handler.
  23  *
  24  * The command's reply should not be sent until the handler has run and
  25  * completed successfully. On failure, the handler's return code should
  26  * be the only reply sent to the client.
  27  */
  28 typedef enum lttng_error_code (*completion_handler_function)(void *);
  29 struct cmd_completion_handler {
  30         completion_handler_function run;
  31         void *data;
  32 };
  33
  34 /*
  35  * Init the command subsystem. Must be called before using any of the functions
  36  * above. This is called in the main() of the session daemon.
  37  */
  38 void cmd_init(void);
  39
  40 /* Session commands */
  41 enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock,
  42                 struct lttng_session_descriptor **return_descriptor);
  43 int cmd_destroy_session(struct ltt_session *session,
  44                 struct notification_thread_handle *notification_thread_handle,
  45                 int *sock_fd);
  46
  47 /* Channel commands */
  48 int cmd_disable_channel(struct ltt_session *session,
  49                 enum lttng_domain_type domain, char *channel_name);
  50 int cmd_enable_channel(struct command_ctx *cmd_ctx, int sock, int wpipe);
  51
  52 /* Process attribute tracker commands */
  53 enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy(
  54                 struct ltt_session *session,
  55                 enum lttng_domain_type domain,
  56                 enum lttng_process_attr process_attr,
  57                 enum lttng_tracking_policy *policy);
  58 enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy(
  59                 struct ltt_session *session,
  60                 enum lttng_domain_type domain,
  61                 enum lttng_process_attr process_attr,
  62                 enum lttng_tracking_policy policy);
  63 enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value(
  64                 struct ltt_session *session,
  65                 enum lttng_domain_type domain,
  66                 enum lttng_process_attr process_attr,
  67                 const struct process_attr_value *value);
  68 enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value(
  69                 struct ltt_session *session,
  70                 enum lttng_domain_type domain,
  71                 enum lttng_process_attr process_attr,
  72                 const struct process_attr_value *value);
  73 enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set(
  74                 struct ltt_session *session,
  75                 enum lttng_domain_type domain,
  76                 enum lttng_process_attr process_attr,
  77                 struct lttng_process_attr_values **values);
  78
  79 /* Event commands */
  80 int cmd_disable_event(struct ltt_session *session,
  81                 enum lttng_domain_type domain,
  82                 const char *channel_name,
  83                 const struct lttng_event *event);
  84 int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain,
  85                 char *channel_name, const struct lttng_event_context *ctx, int kwpipe);
  86 int cmd_set_filter(struct ltt_session *session, enum lttng_domain_type domain,
  87                 char *channel_name, struct lttng_event *event,
  88                 struct lttng_filter_bytecode *bytecode);
  89 int cmd_enable_event(struct ltt_session *session, const struct lttng_domain *domain,
  90                 char *channel_name, struct lttng_event *event,
  91                 char *filter_expression,
  92                 struct lttng_filter_bytecode *filter,
  93                 struct lttng_event_exclusion *exclusion,
  94                 int wpipe);
  95
  96 /* Trace session action commands */
  97 int cmd_start_trace(struct ltt_session *session);
  98 int cmd_stop_trace(struct ltt_session *session);
  99
 100 /* Consumer commands */
 101 int cmd_register_consumer(struct ltt_session *session,
 102                 enum lttng_domain_type domain,
 103                 const char *sock_path, struct consumer_data *cdata);
 104 int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri,
 105                 struct lttng_uri *uris);
 106 int cmd_setup_relayd(struct ltt_session *session);
 107
 108 /* Listing commands */
 109 ssize_t cmd_list_domains(struct ltt_session *session,
 110                 struct lttng_domain **domains);
 111 ssize_t cmd_list_events(enum lttng_domain_type domain,
 112                 struct ltt_session *session, char *channel_name,
 113                 struct lttng_event **events, size_t *total_size);
 114 enum lttng_error_code cmd_list_channels(enum lttng_domain_type domain,
 115                 struct ltt_session *session,
 116                 struct lttng_dynamic_buffer *buffer,
 117                 uint32_t *nb_channel);
 118 ssize_t cmd_list_domains(struct ltt_session *session,
 119                 struct lttng_domain **domains);
 120 void cmd_list_lttng_sessions(struct lttng_session *sessions,
 121                 size_t session_count, uid_t uid, gid_t gid);
 122 ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain,
 123                 struct lttng_event_field **fields);
 124 ssize_t cmd_list_tracepoints(enum lttng_domain_type domain,
 125                 struct lttng_event **events);
 126 ssize_t cmd_snapshot_list_outputs(struct ltt_session *session,
 127                 struct lttng_snapshot_output **outputs);
 128 ssize_t cmd_list_syscalls(struct lttng_event **events);
 129
 130 int cmd_data_pending(struct ltt_session *session);
 131
 132 /* Snapshot */
 133 int cmd_snapshot_add_output(struct ltt_session *session,
 134                 const struct lttng_snapshot_output *output, uint32_t *id);
 135 int cmd_snapshot_del_output(struct ltt_session *session,
 136                 const struct lttng_snapshot_output *output);
 137 int cmd_snapshot_record(struct ltt_session *session,
 138                 const struct lttng_snapshot_output *output, int wait);
 139
 140 int cmd_set_session_shm_path(struct ltt_session *session,
 141                 const char *shm_path);
 142 int cmd_regenerate_metadata(struct ltt_session *session);
 143 int cmd_regenerate_statedump(struct ltt_session *session);
 144
 145 int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock,
 146                 struct notification_thread_handle *notification_thread_handle);
 147 int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock,
 148                 struct notification_thread_handle *notification_thread_handle);
 149
 150 int cmd_rotate_session(struct ltt_session *session,
 151                 struct lttng_rotate_session_return *rotate_return,
 152                 bool quiet_rotation,
 153                 enum lttng_trace_chunk_command_type command);
 154 int cmd_rotate_get_info(struct ltt_session *session,
 155                 struct lttng_rotation_get_info_return *info_return,
 156                 uint64_t rotate_id);
 157 int cmd_rotation_set_schedule(struct ltt_session *session,
 158                 bool activate, enum lttng_rotation_schedule_type schedule_type,
 159                 uint64_t value,
 160                 struct notification_thread_handle *notification_thread_handle);
 161
 162 const struct cmd_completion_handler *cmd_pop_completion_handler(void);
 163 int start_kernel_session(struct ltt_kernel_session *ksess);
 164 int stop_kernel_session(struct ltt_kernel_session *ksess);
 165
 166 #endif /* CMD_H */