projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 022d91ba DG |
1 | /* |
| 2 | * Copyright (C) 2013 - 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 LTTNG_SESSIOND_AGENT_H | |
| 19 | #define LTTNG_SESSIOND_AGENT_H | |
| 20 | ||
| 21 | #define _GNU_SOURCE | |
| 22 | #include <inttypes.h> | |
| 23 | ||
| 24 | #include <common/hashtable/hashtable.h> | |
| 25 | #include <lttng/lttng.h> | |
| 26 | ||
| 27 | /* | |
| 28 | * Hash table that contains the agent app created upon registration indexed by | |
| 29 | * socket. | |
| 30 | */ | |
| 31 | struct lttng_ht *agent_apps_ht_by_sock; | |
| 32 | ||
| 33 | struct agent_ht_key { | |
| 34 | const char *name; | |
| 35 | int loglevel; | |
| 36 | }; | |
| 37 | ||
| 38 | /* | |
| 39 | * Registration message payload from an agent application. The PID is used to | |
| 40 | * find back the corresponding UST app object so both socket can be linked. | |
| 41 | */ | |
| 42 | struct agent_register_msg { | |
| 43 | uint32_t pid; | |
| 44 | }; | |
| 45 | ||
| 46 | /* | |
| 47 | * Agent application object created after a successful registration. This | |
| 48 | * object is linked to its associated UST app by their PID through hash table | |
| 49 | * lookups. | |
| 50 | */ | |
| 51 | struct agent_app { | |
| 52 | /* | |
| 53 | * PID sent during registration of a AGENT application. | |
| 54 | */ | |
| 55 | pid_t pid; | |
| 56 | ||
| 57 | /* | |
| 58 | * AGENT TCP socket that was created upon registration. | |
| 59 | */ | |
| 60 | struct lttcomm_sock *sock; | |
| 61 | ||
| 62 | /* Initialized with the AGENT sock value. */ | |
| 63 | struct lttng_ht_node_ulong node; | |
| 64 | }; | |
| 65 | ||
| 66 | /* | |
| 67 | * Agent event representation. | |
| 68 | */ | |
| 69 | struct agent_event { | |
| 70 | /* Name of the event. */ | |
| 71 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
| 72 | int loglevel; | |
| 73 | enum lttng_loglevel_type loglevel_type; | |
| 74 | ||
| 75 | /* | |
| 76 | * Tells if the event is enabled or not on the agent. | |
| 77 | */ | |
| 78 | unsigned int enabled:1; | |
| 79 | ||
| 80 | /* Hash table node of the agent domain object. */ | |
| 81 | struct lttng_ht_node_str node; | |
| 82 | ||
| 83 | /* Bytecode filter associated with the event . NULL if none. */ | |
| 84 | struct lttng_filter_bytecode *filter; | |
| 85 | }; | |
| 86 | ||
| 87 | /* | |
| 88 | * Agent object containing events enabled/disabled for it. | |
| 89 | */ | |
| 90 | struct agent { | |
| 91 | /* | |
| 92 | * This indicates if that domain is being used meaning if at least one | |
| 93 | * event has been at some point in time added to it. This is used so when | |
| 94 | * listing domains for a session, we can tell or not if the agent is | |
| 95 | * actually enabled. | |
| 96 | */ | |
| 97 | unsigned int being_used:1; | |
| 98 | /* Contains event indexed by name. */ | |
| 99 | struct lttng_ht *events; | |
| 100 | }; | |
| 101 | ||
| 102 | /* Setup agent subsystem. */ | |
| 103 | int agent_setup(void); | |
| 104 | ||
| 105 | /* Initialize an already allocated agent domain. */ | |
| 106 | int agent_init(struct agent *agt); | |
| 107 | void agent_destroy(struct agent *agt); | |
| 108 | ||
| 109 | /* Agent event API. */ | |
| 110 | struct agent_event *agent_create_event(const char *name, | |
| 111 | struct lttng_filter_bytecode *filter); | |
| 112 | void agent_add_event(struct agent_event *event, struct agent *agt); | |
| 113 | ||
| 114 | struct agent_event *agent_find_event(const char *name, int loglevel, | |
| 115 | struct agent *agt); | |
| 116 | struct agent_event *agent_find_event_by_name(const char *name, | |
| 117 | struct agent *agt); | |
| 118 | void agent_delete_event(struct agent_event *event, struct agent *agt); | |
| 119 | void agent_destroy_event(struct agent_event *event); | |
| 120 | ||
| 121 | /* Agent app API. */ | |
| 122 | struct agent_app *agent_create_app(pid_t pid, struct lttcomm_sock *sock); | |
| 123 | void agent_add_app(struct agent_app *app); | |
| 124 | void agent_delete_app(struct agent_app *app); | |
| 125 | struct agent_app *agent_find_app_by_sock(int sock); | |
| 126 | void agent_destroy_app(struct agent_app *app); | |
| 127 | int agent_send_registration_done(struct agent_app *app); | |
| 128 | ||
| 129 | /* Agent action API */ | |
| 130 | int agent_enable_event(struct agent_event *event); | |
| 131 | int agent_disable_event(struct agent_event *event); | |
| 132 | void agent_update(struct agent *agt, int sock); | |
| 133 | int agent_list_events(struct lttng_event **events); | |
| 134 | ||
| 135 | #endif /* LTTNG_SESSIOND_AGENT_H */ |