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