src/bin/lttng-sessiond/cmd.h

   1 /*
   2  * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License, version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef CMD_H
  19 #define CMD_H
  20
  21 #include "context.h"
  22 #include "session.h"
  23
  24 struct notification_thread_handle;
  25
  26 /*
  27  * A callback (and associated user data) that should be run after a command
  28  * has been executed. No locks should be taken while executing this handler.
  29  *
  30  * The command's reply should not be sent until the handler has run and
  31  * completed successfully. On failure, the handler's return code should
  32  * be the only reply sent to the client.
  33  */
  34 typedef enum lttng_error_code (*completion_handler_function)(void *);
  35 struct cmd_completion_handler {
  36         completion_handler_function run;
  37         void *data;
  38 };
  39
  40 /*
  41  * Init the command subsystem. Must be called before using any of the functions
  42  * above. This is called in the main() of the session daemon.
  43  */
  44 void cmd_init(void);
  45
  46 /* Session commands */
  47 enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock,
  48                 struct lttng_session_descriptor **return_descriptor);
  49 int cmd_destroy_session(struct ltt_session *session,
  50                 struct notification_thread_handle *notification_thread_handle,
  51                 int *sock_fd);
  52
  53 /* Channel commands */
  54 int cmd_disable_channel(struct ltt_session *session,
  55                 enum lttng_domain_type domain, char *channel_name);
  56 int cmd_enable_channel(struct ltt_session *session,
  57                 struct lttng_domain *domain, struct lttng_channel *attr,
  58                 int wpipe);
  59 int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain,
  60                 int pid);
  61 int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain,
  62                 int pid);
  63
  64 /* Event commands */
  65 int cmd_disable_event(struct ltt_session *session,
  66                 enum lttng_domain_type domain,
  67                 char *channel_name,
  68                 struct lttng_event *event);
  69 int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain,
  70                 char *channel_name, struct lttng_event_context *ctx, int kwpipe);
  71 int cmd_set_filter(struct ltt_session *session, enum lttng_domain_type domain,
  72                 char *channel_name, struct lttng_event *event,
  73                 struct lttng_filter_bytecode *bytecode);
  74 int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain,
  75                 char *channel_name, struct lttng_event *event,
  76                 char *filter_expression,
  77                 struct lttng_filter_bytecode *filter,
  78                 struct lttng_event_exclusion *exclusion,
  79                 int wpipe);
  80
  81 /* Trace session action commands */
  82 int cmd_start_trace(struct ltt_session *session);
  83 int cmd_stop_trace(struct ltt_session *session);
  84
  85 /* Consumer commands */
  86 int cmd_register_consumer(struct ltt_session *session,
  87                 enum lttng_domain_type domain,
  88                 const char *sock_path, struct consumer_data *cdata);
  89 int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri,
  90                 struct lttng_uri *uris);
  91 int cmd_setup_relayd(struct ltt_session *session);
  92
  93 /* Listing commands */
  94 ssize_t cmd_list_domains(struct ltt_session *session,
  95                 struct lttng_domain **domains);
  96 ssize_t cmd_list_events(enum lttng_domain_type domain,
  97                 struct ltt_session *session, char *channel_name,
  98                 struct lttng_event **events, size_t *total_size);
  99 ssize_t cmd_list_channels(enum lttng_domain_type domain,
 100                 struct ltt_session *session, struct lttng_channel **channels);
 101 ssize_t cmd_list_domains(struct ltt_session *session,
 102                 struct lttng_domain **domains);
 103 void cmd_list_lttng_sessions(struct lttng_session *sessions,
 104                 size_t session_count, uid_t uid, gid_t gid);
 105 ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain,
 106                 struct lttng_event_field **fields);
 107 ssize_t cmd_list_tracepoints(enum lttng_domain_type domain,
 108                 struct lttng_event **events);
 109 ssize_t cmd_snapshot_list_outputs(struct ltt_session *session,
 110                 struct lttng_snapshot_output **outputs);
 111 ssize_t cmd_list_syscalls(struct lttng_event **events);
 112 ssize_t cmd_list_tracker_pids(struct ltt_session *session,
 113                 enum lttng_domain_type domain, int32_t **pids);
 114
 115 int cmd_data_pending(struct ltt_session *session);
 116
 117 /* Snapshot */
 118 int cmd_snapshot_add_output(struct ltt_session *session,
 119                 struct lttng_snapshot_output *output, uint32_t *id);
 120 int cmd_snapshot_del_output(struct ltt_session *session,
 121                 struct lttng_snapshot_output *output);
 122 int cmd_snapshot_record(struct ltt_session *session,
 123                 struct lttng_snapshot_output *output, int wait);
 124
 125 int cmd_set_session_shm_path(struct ltt_session *session,
 126                 const char *shm_path);
 127 int cmd_regenerate_metadata(struct ltt_session *session);
 128 int cmd_regenerate_statedump(struct ltt_session *session);
 129
 130 int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock,
 131                 struct notification_thread_handle *notification_thread_handle);
 132 int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock,
 133                 struct notification_thread_handle *notification_thread_handle);
 134
 135 int cmd_rotate_session(struct ltt_session *session,
 136                 struct lttng_rotate_session_return *rotate_return);
 137 int cmd_rotate_get_info(struct ltt_session *session,
 138                 struct lttng_rotation_get_info_return *info_return,
 139                 uint64_t rotate_id);
 140 int cmd_rotation_set_schedule(struct ltt_session *session,
 141                 bool activate, enum lttng_rotation_schedule_type schedule_type,
 142                 uint64_t value,
 143                 struct notification_thread_handle *notification_thread_handle);
 144
 145 const struct cmd_completion_handler *cmd_pop_completion_handler(void);
 146
 147 #endif /* CMD_H */