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
   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
  24 #include "trace-ust.h"
  25
  26 #define UST_APP_EVENT_LIST_SIZE 32
  27
  28 extern int ust_consumerd64_fd, ust_consumerd32_fd;
  29
  30 /*
  31  * Application registration data structure.
  32  */
  33 struct ust_register_msg {
  34         uint32_t major;
  35         uint32_t minor;
  36         pid_t pid;
  37         pid_t ppid;
  38         uid_t uid;
  39         gid_t gid;
  40         uint32_t bits_per_long;
  41         char name[16];
  42 };
  43
  44 /*
  45  * Global applications HT used by the session daemon.
  46  */
  47 struct lttng_ht *ust_app_ht;
  48
  49 struct lttng_ht *ust_app_sock_key_map;
  50
  51 struct ust_app_key {
  52         pid_t pid;
  53         int sock;
  54         struct lttng_ht_node_ulong node;
  55 };
  56
  57 struct ust_app_ctx {
  58         int handle;
  59         struct lttng_ust_context ctx;
  60         struct lttng_ust_object_data *obj;
  61         struct lttng_ht_node_ulong node;
  62 };
  63
  64 struct ust_app_event {
  65         int enabled;
  66         int handle;
  67         struct lttng_ust_object_data *obj;
  68         struct lttng_ust_event attr;
  69         char name[LTTNG_UST_SYM_NAME_LEN];
  70         struct lttng_ht *ctx;
  71         struct lttng_ht_node_str node;
  72 };
  73
  74 struct ust_app_channel {
  75         int enabled;
  76         int handle;
  77         char name[LTTNG_UST_SYM_NAME_LEN];
  78         struct lttng_ust_channel attr;
  79         struct lttng_ust_object_data *obj;
  80         struct ltt_ust_stream_list streams;
  81         struct lttng_ht *ctx;
  82         struct lttng_ht *events;
  83         struct lttng_ht_node_str node;
  84 };
  85
  86 struct ust_app_session {
  87         int enabled;
  88         /* started: has the session been in started state at any time ? */
  89         int started;  /* allows detection of start vs restart. */
  90         int handle;   /* used has unique identifier for app session */
  91         int id;       /* session unique identifier */
  92         struct ltt_ust_metadata *metadata;
  93         struct lttng_ht *channels; /* Registered channels */
  94         struct lttng_ht_node_ulong node;
  95         char path[PATH_MAX];
  96         /* UID/GID of the user owning the session */
  97         uid_t uid;
  98         gid_t gid;
  99 };
 100
 101 /*
 102  * Registered traceable applications. Libust registers to the session daemon
 103  * and a linked list is kept of all running traceable app.
 104  */
 105 struct ust_app {
 106         pid_t ppid;
 107         uid_t uid;           /* User ID that owns the apps */
 108         gid_t gid;           /* Group ID that owns the apps */
 109         int bits_per_long;
 110         uint32_t v_major;    /* Verion major number */
 111         uint32_t v_minor;    /* Verion minor number */
 112         char name[17];       /* Process name (short) */
 113         struct lttng_ht *sessions;
 114         struct lttng_ht_node_ulong node;
 115         struct ust_app_key key;
 116 };
 117
 118 #ifdef HAVE_LIBLTTNG_UST_CTL
 119
 120 int ust_app_register(struct ust_register_msg *msg, int sock);
 121 static inline
 122 int ust_app_register_done(int sock)
 123 {
 124         return ustctl_register_done(sock);
 125 }
 126 void ust_app_unregister(int sock);
 127 unsigned long ust_app_list_count(void);
 128 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 129 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
 130 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 131 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 132 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
 133 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 134 int ust_app_list_events(struct lttng_event **events);
 135 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 136                 struct ltt_ust_channel *uchan);
 137 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 138                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 139 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 140                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 141                 pid_t pid);
 142 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 143                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 144                 pid_t pid);
 145 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 146                 struct ltt_ust_channel *uchan);
 147 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 148                 struct ltt_ust_channel *uchan);
 149 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 150                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 151 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 152                 struct ltt_ust_channel *uchan);
 153 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 154                 struct ltt_ust_channel *uchan);
 155 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 156                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 157 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 158                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 159                 struct ltt_ust_context *uctx);
 160 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 161                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
 162 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 163
 164 void ust_app_clean_list(void);
 165 void ust_app_ht_alloc(void);
 166 struct lttng_ht *ust_app_get_ht(void);
 167 struct ust_app *ust_app_find_by_pid(pid_t pid);
 168
 169 #else /* HAVE_LIBLTTNG_UST_CTL */
 170
 171 static inline
 172 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
 173 {
 174         return 0;
 175 }
 176 static inline
 177 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 178 {
 179         return 0;
 180 }
 181 static inline
 182 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 183 {
 184         return 0;
 185 }
 186 static inline
 187 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
 188 {
 189         return 0;
 190 }
 191 static inline
 192 int ust_app_list_events(struct lttng_event **events)
 193 {
 194         return 0;
 195 }
 196 static inline
 197 int ust_app_register(struct ust_register_msg *msg, int sock)
 198 {
 199         return -ENOSYS;
 200 }
 201 static inline
 202 int ust_app_register_done(int sock)
 203 {
 204         return -ENOSYS;
 205 }
 206 static inline
 207 void ust_app_unregister(int sock)
 208 {
 209 }
 210 static inline
 211 unsigned int ust_app_list_count(void)
 212 {
 213         return 0;
 214 }
 215 static inline
 216 void ust_app_lock_list(void)
 217 {
 218 }
 219 static inline
 220 void ust_app_unlock_list(void)
 221 {
 222 }
 223 static inline
 224 void ust_app_clean_list(void)
 225 {
 226 }
 227 static inline
 228 struct ust_app_list *ust_app_get_list(void)
 229 {
 230         return NULL;
 231 }
 232 static inline
 233 struct ust_app *ust_app_get_by_pid(pid_t pid)
 234 {
 235         return NULL;
 236 }
 237 static inline
 238 struct lttng_ht *ust_app_get_ht(void)
 239 {
 240         return NULL;
 241 }
 242 static inline
 243 void ust_app_ht_alloc(void)
 244 {}
 245 static inline
 246 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 247 {}
 248 static inline
 249 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 250                 struct ltt_ust_channel *uchan)
 251 {
 252         return 0;
 253 }
 254 static inline
 255 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 256                 struct ltt_ust_channel *uchan)
 257 {
 258         return 0;
 259 }
 260 static inline
 261 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
 262                 struct ltt_ust_channel *uchan)
 263 {
 264         return 0;
 265 }
 266 static inline
 267 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
 268                 struct ltt_ust_channel *uchan)
 269 {
 270         return 0;
 271 }
 272 static inline
 273 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
 274                 struct ltt_ust_channel *uchan)
 275 {
 276         return 0;
 277 }
 278 static inline
 279 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 280                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 281 {
 282         return 0;
 283 }
 284 static inline
 285 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 286                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 287 {
 288         return 0;
 289 }
 290 static inline
 291 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 292                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 293 {
 294         return 0;
 295 }
 296 static inline
 297 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
 298                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 299                 struct ltt_ust_context *uctx)
 300 {
 301         return 0;
 302 }
 303 static inline
 304 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 305                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
 306 {
 307         return 0;
 308 }
 309 static inline
 310 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
 311                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 312                 pid_t pid)
 313 {
 314         return 0;
 315 }
 316 static inline
 317 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
 318                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
 319                 pid_t pid)
 320 {
 321         return 0;
 322 }
 323
 324 #endif /* HAVE_LIBLTTNG_UST_CTL */
 325
 326 #endif /* _LTT_UST_APP_H */