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 /*
  30  * Application registration data structure.
  31  */
  32 struct ust_register_msg {
  33         uint32_t major;
  34         uint32_t minor;
  35         pid_t pid;
  36         pid_t ppid;
  37         uid_t uid;
  38         gid_t gid;
  39         char name[16];
  40 };
  41
  42 /*
  43  * Global applications HT used by the session daemon.
  44  */
  45 struct cds_lfht *ust_app_ht;
  46
  47 struct cds_lfht *ust_app_sock_key_map;
  48
  49 struct ust_app_key {
  50         pid_t pid;
  51         int sock;
  52         struct cds_lfht_node node;
  53 };
  54
  55 struct ust_app_event {
  56         int enabled;
  57         int handle;
  58         struct lttng_ust_object_data *obj;
  59         struct lttng_ust_event attr;
  60         char name[LTTNG_UST_SYM_NAME_LEN];
  61         struct cds_lfht *ctx;
  62         struct cds_lfht_node node;
  63 };
  64
  65 struct ust_app_channel {
  66         int enabled;
  67         int handle;
  68         char name[LTTNG_UST_SYM_NAME_LEN];
  69         struct lttng_ust_channel attr;
  70         struct lttng_ust_object_data *obj;
  71         struct ltt_ust_stream_list streams;
  72         struct cds_lfht *ctx;
  73         struct cds_lfht *events;
  74         struct cds_lfht_node node;
  75 };
  76
  77 struct ust_app_session {
  78         int enabled;
  79         int handle;   /* Used has unique identifier */
  80         unsigned int uid;
  81         struct ltt_ust_metadata *metadata;
  82         struct lttng_ust_object_data *obj;
  83         struct cds_lfht *channels; /* Registered channels */
  84         struct cds_lfht_node node;
  85 };
  86
  87 /*
  88  * Registered traceable applications. Libust registers to the session daemon
  89  * and a linked list is kept of all running traceable app.
  90  */
  91 struct ust_app {
  92         pid_t ppid;
  93         uid_t uid;           /* User ID that owns the apps */
  94         gid_t gid;           /* Group ID that owns the apps */
  95         uint32_t v_major;    /* Verion major number */
  96         uint32_t v_minor;    /* Verion minor number */
  97         char name[17];       /* Process name (short) */
  98         struct cds_lfht *sessions;
  99         struct cds_lfht_node node;
 100         struct ust_app_key key;
 101         int sock_closed;
 102 };
 103
 104 #ifdef HAVE_LIBLTTNG_UST_CTL
 105
 106 int ust_app_register(struct ust_register_msg *msg, int sock);
 107 void ust_app_unregister(int sock);
 108 int ust_app_add_channel_all(struct ltt_ust_session *usess,
 109                 struct ltt_ust_channel *uchan);
 110 int ust_app_add_event_all(struct ltt_ust_session *usess,
 111                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 112 unsigned long ust_app_list_count(void);
 113 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
 114 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 115 int ust_app_list_events(struct lttng_event **events);
 116 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 117
 118 void ust_app_clean_list(void);
 119 void ust_app_ht_alloc(void);
 120 struct cds_lfht *ust_app_get_ht(void);
 121 struct ust_app *ust_app_find_by_pid(pid_t pid);
 122
 123 #else /* HAVE_LIBLTTNG_UST_CTL */
 124
 125 static inline
 126 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 127 {
 128         return 0;
 129 }
 130 static inline
 131 int ust_app_start_trace_all(struct ltt_ust_session *usess)
 132 {
 133         return 0;
 134 }
 135 static inline
 136 int ust_app_list_events(struct lttng_event **events)
 137 {
 138         return 0;
 139 }
 140 static inline
 141 int ust_app_register(struct ust_register_msg *msg, int sock)
 142 {
 143         return -ENOSYS;
 144 }
 145 static inline
 146 void ust_app_unregister(int sock)
 147 {
 148 }
 149 static inline
 150 unsigned int ust_app_list_count(void)
 151 {
 152         return 0;
 153 }
 154 static inline
 155 void ust_app_lock_list(void)
 156 {
 157 }
 158 static inline
 159 void ust_app_unlock_list(void)
 160 {
 161 }
 162 static inline
 163 void ust_app_clean_list(void)
 164 {
 165 }
 166 static inline
 167 struct ust_app_list *ust_app_get_list(void)
 168 {
 169         return NULL;
 170 }
 171 static inline
 172 struct ust_app *ust_app_get_by_pid(pid_t pid)
 173 {
 174         return NULL;
 175 }
 176 static inline
 177 int ust_app_add_channel_all(struct ltt_ust_session *usess,
 178                 struct ltt_ust_channel *uchan)
 179 {
 180         return 0;
 181 }
 182 static inline
 183 int ust_app_add_event_all(struct ltt_ust_session *usess,
 184                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 185 {
 186         return 0;
 187 }
 188 static inline
 189 struct cds_lfht *ust_app_get_ht(void)
 190 {
 191         return NULL;
 192 }
 193 static inline
 194 void ust_app_ht_alloc(void)
 195 {
 196 }
 197 static inline
 198 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 199 {
 200 }
 201
 202 #endif /* HAVE_LIBLTTNG_UST_CTL */
 203
 204 #endif /* _LTT_UST_APP_H */