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         int handle;   /* Used has unique identifier */
  82         unsigned int uid;
  83         struct ltt_ust_metadata *metadata;
  84         struct lttng_ust_object_data *obj;
  85         struct cds_lfht *channels; /* Registered channels */
  86         struct cds_lfht_node node;
  87 };
  88
  89 /*
  90  * Registered traceable applications. Libust registers to the session daemon
  91  * and a linked list is kept of all running traceable app.
  92  */
  93 struct ust_app {
  94         pid_t ppid;
  95         uid_t uid;           /* User ID that owns the apps */
  96         gid_t gid;           /* Group ID that owns the apps */
  97         uint32_t v_major;    /* Verion major number */
  98         uint32_t v_minor;    /* Verion minor number */
  99         char name[17];       /* Process name (short) */
 100         struct cds_lfht *sessions;
 101         struct cds_lfht_node node;
 102         struct ust_app_key key;
 103         int sock_closed;
 104 };
 105
 106 #ifdef HAVE_LIBLTTNG_UST_CTL
 107
 108 int ust_app_register(struct ust_register_msg *msg, int sock);
 109 void ust_app_unregister(int sock);
 110 int ust_app_create_channel_all(struct ltt_ust_session *usess,
 111                 struct ltt_ust_channel *uchan);
 112 int ust_app_create_event_all(struct ltt_ust_session *usess,
 113                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 114 unsigned long ust_app_list_count(void);
 115 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 116 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 117 int ust_app_list_events(struct lttng_event **events);
 118 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 119
 120 void ust_app_clean_list(void);
 121 void ust_app_ht_alloc(void);
 122 struct cds_lfht *ust_app_get_ht(void);
 123 struct ust_app *ust_app_find_by_pid(pid_t pid);
 124
 125 #else /* HAVE_LIBLTTNG_UST_CTL */
 126
 127 static inline
 128 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 129 {
 130         return 0;
 131 }
 132 static inline
 133 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 134 {
 135         return 0;
 136 }
 137 static inline
 138 int ust_app_list_events(struct lttng_event **events)
 139 {
 140         return 0;
 141 }
 142 static inline
 143 int ust_app_register(struct ust_register_msg *msg, int sock)
 144 {
 145         return -ENOSYS;
 146 }
 147 static inline
 148 void ust_app_unregister(int sock)
 149 {
 150 }
 151 static inline
 152 unsigned int ust_app_list_count(void)
 153 {
 154         return 0;
 155 }
 156 static inline
 157 void ust_app_lock_list(void)
 158 {
 159 }
 160 static inline
 161 void ust_app_unlock_list(void)
 162 {
 163 }
 164 static inline
 165 void ust_app_clean_list(void)
 166 {
 167 }
 168 static inline
 169 struct ust_app_list *ust_app_get_list(void)
 170 {
 171         return NULL;
 172 }
 173 static inline
 174 struct ust_app *ust_app_get_by_pid(pid_t pid)
 175 {
 176         return NULL;
 177 }
 178 static inline
 179 int ust_app_add_channel_all(struct ltt_ust_session *usess,
 180                 struct ltt_ust_channel *uchan)
 181 {
 182         return 0;
 183 }
 184 static inline
 185 int ust_app_add_event_all(struct ltt_ust_session *usess,
 186                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 187 {
 188         return 0;
 189 }
 190 static inline
 191 struct cds_lfht *ust_app_get_ht(void)
 192 {
 193         return NULL;
 194 }
 195 static inline
 196 void ust_app_ht_alloc(void)
 197 {
 198 }
 199 static inline
 200 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 201 {
 202 }
 203
 204 #endif /* HAVE_LIBLTTNG_UST_CTL */
 205
 206 #endif /* _LTT_UST_APP_H */