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