src/bin/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 modify
   5  * it under the terms of the GNU General Public License, version 2 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef _LTT_UST_APP_H
  19 #define _LTT_UST_APP_H
  20
  21 #include <stdint.h>
  22
  23 #include "trace-ust.h"
  24
  25 /* lttng-ust supported version. */
  26 #define LTTNG_UST_COMM_MAJOR          2 /* comm protocol major version */
  27 #define UST_APP_MAJOR_VERSION         3 /* Internal UST version supported */
  28
  29 #define UST_APP_EVENT_LIST_SIZE 32
  30
  31 struct lttng_filter_bytecode;
  32 struct lttng_ust_filter_bytecode;
  33
  34 extern int ust_consumerd64_fd, ust_consumerd32_fd;
  35
  36 struct ust_app_ht_key {
  37         const char *name;
  38         const struct lttng_ust_filter_bytecode *filter;
  39         enum lttng_ust_loglevel_type loglevel;
  40 };
  41
  42 /*
  43  * Application registration data structure.
  44  */
  45 struct ust_register_msg {
  46         uint32_t major;
  47         uint32_t minor;
  48         pid_t pid;
  49         pid_t ppid;
  50         uid_t uid;
  51         gid_t gid;
  52         uint32_t bits_per_long;
  53         char name[16];
  54 };
  55
  56 /*
  57  * Global applications HT used by the session daemon. This table is indexed by
  58  * PID using the pid_n node and pid value of an ust_app.
  59  */
  60 struct lttng_ht *ust_app_ht;
  61
  62 /*
  63  * Global applications HT used by the session daemon. This table is indexed by
  64  * socket using the sock_n node and sock value of an ust_app.
  65  */
  66 struct lttng_ht *ust_app_ht_by_sock;
  67
  68 struct ust_app_ctx {
  69         int handle;
  70         struct lttng_ust_context ctx;
  71         struct lttng_ust_object_data *obj;
  72         struct lttng_ht_node_ulong node;
  73 };
  74
  75 struct ust_app_event {
  76         int enabled;
  77         int handle;
  78         struct lttng_ust_object_data *obj;
  79         struct lttng_ust_event attr;
  80         char name[LTTNG_UST_SYM_NAME_LEN];
  81         struct lttng_ht_node_str node;
  82         struct lttng_ust_filter_bytecode *filter;
  83 };
  84
  85 struct ust_app_channel {
  86         int enabled;
  87         int handle;
  88         char name[LTTNG_UST_SYM_NAME_LEN];
  89         struct lttng_ust_channel attr;
  90         struct lttng_ust_object_data *obj;
  91         struct ltt_ust_stream_list streams;
  92         struct lttng_ht *ctx;
  93         struct lttng_ht *events;
  94         struct lttng_ht_node_str node;
  95 };
  96
  97 struct ust_app_session {
  98         int enabled;
  99         /* started: has the session been in started state at any time ? */
 100         int started;  /* allows detection of start vs restart. */
 101         int handle;   /* used has unique identifier for app session */
 102         int id;       /* session unique identifier */
 103         struct ltt_ust_metadata *metadata;
 104         struct lttng_ht *channels; /* Registered channels */
 105         struct lttng_ht_node_ulong node;
 106         char path[PATH_MAX];
 107         /* UID/GID of the user owning the session */
 108         uid_t uid;
 109         gid_t gid;
 110 };
 111
 112 /*
 113  * Registered traceable applications. Libust registers to the session daemon
 114  * and a linked list is kept of all running traceable app.
 115  */
 116 struct ust_app {
 117         int sock;
 118         pid_t pid;
 119         pid_t ppid;
 120         uid_t uid;           /* User ID that owns the apps */
 121         gid_t gid;           /* Group ID that owns the apps */
 122         int bits_per_long;
 123         int compatible; /* If the lttng-ust tracer version does not match the
 124                                            supported version of the session daemon, this flag is
 125                                            set to 0 (NOT compatible) else 1. */
 126         struct lttng_ust_tracer_version version;
 127         uint32_t v_major;    /* Verion major number */
 128         uint32_t v_minor;    /* Verion minor number */
 129         char name[17];       /* Process name (short) */
 130         struct lttng_ht *sessions;
 131         struct lttng_ht_node_ulong pid_n;
 132         struct lttng_ht_node_ulong sock_n;
 133 };
 134
 135 #ifdef HAVE_LIBLTTNG_UST_CTL
 136
 137 int ust_app_register(struct ust_register_msg *msg, int sock);
 138 static inline
 139 int ust_app_register_done(int sock)
 140 {
 141         return ustctl_register_done(sock);
 142 }
 143 void ust_app_unregister(int sock);
 144 unsigned long ust_app_list_count(void);
 145 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 146 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
 147 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 148 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 149 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
 150 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 151 int ust_app_list_events(struct lttng_event **events);
 152 int ust_app_list_event_fields(struct lttng_event_field **fields);
 153 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 154                 struct ltt_ust_channel *uchan);
 155 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 156                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 157 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 158                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 159                 pid_t pid);
 160 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 161                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 162                 pid_t pid);
 163 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 164                 struct ltt_ust_channel *uchan);
 165 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 166                 struct ltt_ust_channel *uchan);
 167 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 168                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 169 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 170                 struct ltt_ust_channel *uchan);
 171 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 172                 struct ltt_ust_channel *uchan);
 173 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 174                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 175 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 176                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
 177 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 178
 179 void ust_app_clean_list(void);
 180 void ust_app_ht_alloc(void);
 181 struct lttng_ht *ust_app_get_ht(void);
 182 struct ust_app *ust_app_find_by_pid(pid_t pid);
 183 int ust_app_validate_version(int sock);
 184 int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
 185
 186 #else /* HAVE_LIBLTTNG_UST_CTL */
 187
 188 static inline
 189 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
 190 {
 191         return 0;
 192 }
 193 static inline
 194 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 195 {
 196         return 0;
 197 }
 198 static inline
 199 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 200 {
 201         return 0;
 202 }
 203 static inline
 204 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
 205 {
 206         return 0;
 207 }
 208 static inline
 209 int ust_app_list_events(struct lttng_event **events)
 210 {
 211         return -ENOSYS;
 212 }
 213 static inline
 214 int ust_app_list_event_fields(struct lttng_event_field **fields)
 215 {
 216         return -ENOSYS;
 217 }
 218 static inline
 219 int ust_app_register(struct ust_register_msg *msg, int sock)
 220 {
 221         return -ENOSYS;
 222 }
 223 static inline
 224 int ust_app_register_done(int sock)
 225 {
 226         return -ENOSYS;
 227 }
 228 static inline
 229 void ust_app_unregister(int sock)
 230 {
 231 }
 232 static inline
 233 unsigned int ust_app_list_count(void)
 234 {
 235         return 0;
 236 }
 237 static inline
 238 void ust_app_lock_list(void)
 239 {
 240 }
 241 static inline
 242 void ust_app_unlock_list(void)
 243 {
 244 }
 245 static inline
 246 void ust_app_clean_list(void)
 247 {
 248 }
 249 static inline
 250 struct ust_app_list *ust_app_get_list(void)
 251 {
 252         return NULL;
 253 }
 254 static inline
 255 struct ust_app *ust_app_get_by_pid(pid_t pid)
 256 {
 257         return NULL;
 258 }
 259 static inline
 260 struct lttng_ht *ust_app_get_ht(void)
 261 {
 262         return NULL;
 263 }
 264 static inline
 265 void ust_app_ht_alloc(void)
 266 {}
 267 static inline
 268 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 269 {}
 270 static inline
 271 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 272                 struct ltt_ust_channel *uchan)
 273 {
 274         return 0;
 275 }
 276 static inline
 277 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 278                 struct ltt_ust_channel *uchan)
 279 {
 280         return 0;
 281 }
 282 static inline
 283 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 284                 struct ltt_ust_channel *uchan)
 285 {
 286         return 0;
 287 }
 288 static inline
 289 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 290                 struct ltt_ust_channel *uchan)
 291 {
 292         return 0;
 293 }
 294 static inline
 295 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 296                 struct ltt_ust_channel *uchan)
 297 {
 298         return 0;
 299 }
 300 static inline
 301 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 302                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 303 {
 304         return 0;
 305 }
 306 static inline
 307 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 308                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 309 {
 310         return 0;
 311 }
 312 static inline
 313 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 314                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 315 {
 316         return 0;
 317 }
 318 static inline
 319 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 320                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
 321 {
 322         return 0;
 323 }
 324 static inline
 325 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 326                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 327                 pid_t pid)
 328 {
 329         return 0;
 330 }
 331 static inline
 332 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 333                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 334                 pid_t pid)
 335 {
 336         return 0;
 337 }
 338 static inline
 339 int ust_app_validate_version(int sock)
 340 {
 341         return 0;
 342 }
 343 static inline
 344 int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
 345 {
 346         return 0;
 347 }
 348
 349 #endif /* HAVE_LIBLTTNG_UST_CTL */
 350
 351 #endif /* _LTT_UST_APP_H */