lttng-sessiond/ust-app.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #ifndef _LTT_UST_APP_H
  20 #define _LTT_UST_APP_H
  21
  22 #include <stdint.h>
  23 #include <urcu/list.h>
  24
  25 #include "trace-ust.h"
  26
  27 #define UST_APP_EVENT_LIST_SIZE 32
  28
  29 extern int ust_consumerd64_fd, ust_consumerd32_fd;
  30
  31 /*
  32  * Application registration data structure.
  33  */
  34 struct ust_register_msg {
  35         uint32_t major;
  36         uint32_t minor;
  37         pid_t pid;
  38         pid_t ppid;
  39         uid_t uid;
  40         gid_t gid;
  41         uint32_t bits_per_long;
  42         char name[16];
  43 };
  44
  45 /*
  46  * Global applications HT used by the session daemon.
  47  */
  48 struct lttng_ht *ust_app_ht;
  49
  50 struct lttng_ht *ust_app_sock_key_map;
  51
  52 struct ust_app_key {
  53         pid_t pid;
  54         int sock;
  55         struct lttng_ht_node_ulong node;
  56 };
  57
  58 struct ust_app_ctx {
  59         int handle;
  60         struct lttng_ust_context ctx;
  61         struct lttng_ust_object_data *obj;
  62         struct lttng_ht_node_ulong node;
  63 };
  64
  65 struct ust_app_event {
  66         int enabled;
  67         int handle;
  68         struct lttng_ust_object_data *obj;
  69         struct lttng_ust_event attr;
  70         char name[LTTNG_UST_SYM_NAME_LEN];
  71         struct lttng_ht *ctx;
  72         struct lttng_ht_node_str node;
  73 };
  74
  75 struct ust_app_channel {
  76         int enabled;
  77         int handle;
  78         char name[LTTNG_UST_SYM_NAME_LEN];
  79         struct lttng_ust_channel attr;
  80         struct lttng_ust_object_data *obj;
  81         struct ltt_ust_stream_list streams;
  82         struct lttng_ht *ctx;
  83         struct lttng_ht *events;
  84         struct lttng_ht_node_str node;
  85 };
  86
  87 struct ust_app_session {
  88         int enabled;
  89         /* started: has the session been in started state at any time ? */
  90         int started;  /* allows detection of start vs restart. */
  91         int handle;   /* used has unique identifier for app session */
  92         int id;       /* session unique identifier */
  93         struct ltt_ust_metadata *metadata;
  94         struct lttng_ht *channels; /* Registered channels */
  95         struct lttng_ht_node_ulong node;
  96         char path[PATH_MAX];
  97         /* UID/GID of the user owning the session */
  98         uid_t uid;
  99         gid_t gid;
 100 };
 101
 102 /*
 103  * Registered traceable applications. Libust registers to the session daemon
 104  * and a linked list is kept of all running traceable app.
 105  */
 106 struct ust_app {
 107         pid_t ppid;
 108         uid_t uid;           /* User ID that owns the apps */
 109         gid_t gid;           /* Group ID that owns the apps */
 110         int bits_per_long;
 111         uint32_t v_major;    /* Verion major number */
 112         uint32_t v_minor;    /* Verion minor number */
 113         char name[17];       /* Process name (short) */
 114         struct lttng_ht *sessions;
 115         struct lttng_ht_node_ulong node;
 116         struct ust_app_key key;
 117 };
 118
 119 #ifdef HAVE_LIBLTTNG_UST_CTL
 120
 121 int ust_app_register(struct ust_register_msg *msg, int sock);
 122 void ust_app_unregister(int sock);
 123 unsigned long ust_app_list_count(void);
 124 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 125 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
 126 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 127 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 128 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
 129 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 130 int ust_app_list_events(struct lttng_event **events);
 131 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 132                 struct ltt_ust_channel *uchan);
 133 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 134                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 135 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 136                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 137                 pid_t pid);
 138 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 139                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 140                 pid_t pid);
 141 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 142                 struct ltt_ust_channel *uchan);
 143 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 144                 struct ltt_ust_channel *uchan);
 145 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 146                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 147 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 148                 struct ltt_ust_channel *uchan);
 149 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 150                 struct ltt_ust_channel *uchan);
 151 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 152                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 153 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 154                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 155                 struct ltt_ust_context *uctx);
 156 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 157                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
 158 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 159
 160 void ust_app_clean_list(void);
 161 void ust_app_ht_alloc(void);
 162 struct lttng_ht *ust_app_get_ht(void);
 163 struct ust_app *ust_app_find_by_pid(pid_t pid);
 164
 165 #else /* HAVE_LIBLTTNG_UST_CTL */
 166
 167 static inline
 168 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
 169 {
 170         return 0;
 171 }
 172 static inline
 173 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 174 {
 175         return 0;
 176 }
 177 static inline
 178 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 179 {
 180         return 0;
 181 }
 182 static inline
 183 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
 184 {
 185         return 0;
 186 }
 187 static inline
 188 int ust_app_list_events(struct lttng_event **events)
 189 {
 190         return 0;
 191 }
 192 static inline
 193 int ust_app_register(struct ust_register_msg *msg, int sock)
 194 {
 195         return -ENOSYS;
 196 }
 197 static inline
 198 void ust_app_unregister(int sock)
 199 {
 200 }
 201 static inline
 202 unsigned int ust_app_list_count(void)
 203 {
 204         return 0;
 205 }
 206 static inline
 207 void ust_app_lock_list(void)
 208 {
 209 }
 210 static inline
 211 void ust_app_unlock_list(void)
 212 {
 213 }
 214 static inline
 215 void ust_app_clean_list(void)
 216 {
 217 }
 218 static inline
 219 struct ust_app_list *ust_app_get_list(void)
 220 {
 221         return NULL;
 222 }
 223 static inline
 224 struct ust_app *ust_app_get_by_pid(pid_t pid)
 225 {
 226         return NULL;
 227 }
 228 static inline
 229 struct lttng_ht *ust_app_get_ht(void)
 230 {
 231         return NULL;
 232 }
 233 static inline
 234 void ust_app_ht_alloc(void)
 235 {}
 236 static inline
 237 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 238 {}
 239 static inline
 240 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 241                 struct ltt_ust_channel *uchan)
 242 {
 243         return 0;
 244 }
 245 static inline
 246 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 247                 struct ltt_ust_channel *uchan)
 248 {
 249         return 0;
 250 }
 251 static inline
 252 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 253                 struct ltt_ust_channel *uchan)
 254 {
 255         return 0;
 256 }
 257 static inline
 258 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 259                 struct ltt_ust_channel *uchan)
 260 {
 261         return 0;
 262 }
 263 static inline
 264 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 265                 struct ltt_ust_channel *uchan)
 266 {
 267         return 0;
 268 }
 269 static inline
 270 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 271                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 272 {
 273         return 0;
 274 }
 275 static inline
 276 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 277                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 278 {
 279         return 0;
 280 }
 281 static inline
 282 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 283                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 284 {
 285         return 0;
 286 }
 287 static inline
 288 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 289                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 290                 struct ltt_ust_context *uctx)
 291 {
 292         return 0;
 293 }
 294 static inline
 295 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 296                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
 297 {
 298         return 0;
 299 }
 300 static inline
 301 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 302                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 303                 pid_t pid)
 304 {
 305         return 0;
 306 }
 307 static inline
 308 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 309                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 310                 pid_t pid)
 311 {
 312         return 0;
 313 }
 314
 315 #endif /* HAVE_LIBLTTNG_UST_CTL */
 316
 317 #endif /* _LTT_UST_APP_H */