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_consumer_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         char name[16];
  42 };
  43
  44 /*
  45  * Global applications HT used by the session daemon.
  46  */
  47 struct cds_lfht *ust_app_ht;
  48
  49 struct cds_lfht *ust_app_sock_key_map;
  50
  51 struct ust_app_key {
  52         pid_t pid;
  53         int sock;
  54         struct cds_lfht_node node;
  55 };
  56
  57 struct ust_app_event {
  58         int enabled;
  59         int handle;
  60         struct lttng_ust_object_data *obj;
  61         struct lttng_ust_event attr;
  62         char name[LTTNG_UST_SYM_NAME_LEN];
  63         struct cds_lfht *ctx;
  64         struct cds_lfht_node node;
  65 };
  66
  67 struct ust_app_channel {
  68         int enabled;
  69         int handle;
  70         char name[LTTNG_UST_SYM_NAME_LEN];
  71         struct lttng_ust_channel attr;
  72         struct lttng_ust_object_data *obj;
  73         struct ltt_ust_stream_list streams;
  74         struct cds_lfht *ctx;
  75         struct cds_lfht *events;
  76         struct cds_lfht_node node;
  77 };
  78
  79 struct ust_app_session {
  80         int enabled;
  81         /* started: has the session been in started state at any time ? */
  82         int started;  /* allows detection of start vs restart. */
  83         int handle;   /* Used has unique identifier */
  84         unsigned int uid;
  85         struct ltt_ust_metadata *metadata;
  86         struct cds_lfht *channels; /* Registered channels */
  87         struct cds_lfht_node node;
  88         char path[PATH_MAX];
  89 };
  90
  91 /*
  92  * Registered traceable applications. Libust registers to the session daemon
  93  * and a linked list is kept of all running traceable app.
  94  */
  95 struct ust_app {
  96         pid_t ppid;
  97         uid_t uid;           /* User ID that owns the apps */
  98         gid_t gid;           /* Group ID that owns the apps */
  99         uint32_t v_major;    /* Verion major number */
 100         uint32_t v_minor;    /* Verion minor number */
 101         char name[17];       /* Process name (short) */
 102         struct cds_lfht *sessions;
 103         struct cds_lfht_node node;
 104         struct ust_app_key key;
 105 };
 106
 107 #ifdef HAVE_LIBLTTNG_UST_CTL
 108
 109 int ust_app_register(struct ust_register_msg *msg, int sock);
 110 void ust_app_unregister(int sock);
 111 int ust_app_create_channel_all(struct ltt_ust_session *usess,
 112                 struct ltt_ust_channel *uchan);
 113 int ust_app_create_event_all(struct ltt_ust_session *usess,
 114                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 115 unsigned long ust_app_list_count(void);
 116 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 117 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
 118 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 119 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 120 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
 121 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 122 int ust_app_list_events(struct lttng_event **events);
 123 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 124
 125 void ust_app_clean_list(void);
 126 void ust_app_ht_alloc(void);
 127 struct cds_lfht *ust_app_get_ht(void);
 128 struct ust_app *ust_app_find_by_pid(pid_t pid);
 129
 130 #else /* HAVE_LIBLTTNG_UST_CTL */
 131
 132 static inline
 133 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 134 {
 135         return 0;
 136 }
 137 static inline
 138 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 139 {
 140         return 0;
 141 }
 142 static inline
 143 int ust_app_list_events(struct lttng_event **events)
 144 {
 145         return 0;
 146 }
 147 static inline
 148 int ust_app_register(struct ust_register_msg *msg, int sock)
 149 {
 150         return -ENOSYS;
 151 }
 152 static inline
 153 void ust_app_unregister(int sock)
 154 {
 155 }
 156 static inline
 157 unsigned int ust_app_list_count(void)
 158 {
 159         return 0;
 160 }
 161 static inline
 162 void ust_app_lock_list(void)
 163 {
 164 }
 165 static inline
 166 void ust_app_unlock_list(void)
 167 {
 168 }
 169 static inline
 170 void ust_app_clean_list(void)
 171 {
 172 }
 173 static inline
 174 struct ust_app_list *ust_app_get_list(void)
 175 {
 176         return NULL;
 177 }
 178 static inline
 179 struct ust_app *ust_app_get_by_pid(pid_t pid)
 180 {
 181         return NULL;
 182 }
 183 static inline
 184 int ust_app_add_channel_all(struct ltt_ust_session *usess,
 185                 struct ltt_ust_channel *uchan)
 186 {
 187         return 0;
 188 }
 189 static inline
 190 int ust_app_add_event_all(struct ltt_ust_session *usess,
 191                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 192 {
 193         return 0;
 194 }
 195 static inline
 196 struct cds_lfht *ust_app_get_ht(void)
 197 {
 198         return NULL;
 199 }
 200 static inline
 201 void ust_app_ht_alloc(void)
 202 {
 203 }
 204 static inline
 205 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 206 {
 207 }
 208
 209 #endif /* HAVE_LIBLTTNG_UST_CTL */
 210
 211 #endif /* _LTT_UST_APP_H */