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 /*
  28  * Application registration data structure.
  29  */
  30 struct ust_register_msg {
  31         uint32_t major;
  32         uint32_t minor;
  33         pid_t pid;
  34         pid_t ppid;
  35         uid_t uid;
  36         gid_t gid;
  37         char name[16];
  38 };
  39
  40 /*
  41  * Global applications HT used by the session daemon.
  42  */
  43 struct cds_lfht *ust_app_ht;
  44
  45 struct cds_lfht *ust_app_sock_key_map;
  46
  47 struct ust_app_key {
  48         pid_t pid;
  49         int sock;
  50         struct cds_lfht_node node;
  51 };
  52
  53 struct ust_app_event {
  54         int enabled;
  55         int handle;
  56         struct lttng_ust_object_data *obj;
  57         char name[LTTNG_UST_SYM_NAME_LEN];
  58         struct cds_lfht *ctx;
  59         struct cds_lfht_node node;
  60 };
  61
  62 struct ust_app_channel {
  63         int enabled;
  64         int handle;
  65         char name[LTTNG_UST_SYM_NAME_LEN];
  66         struct lttng_ust_channel attr;
  67         struct lttng_ust_object_data *obj;
  68         struct ltt_ust_stream_list streams;
  69         struct cds_lfht *ctx;
  70         struct cds_lfht *events;
  71         struct cds_lfht_node node;
  72 };
  73
  74 struct ust_app_session {
  75         int enabled;
  76         int handle;   /* Used has unique identifier */
  77         unsigned int uid;
  78         struct ltt_ust_metadata *metadata;
  79         struct lttng_ust_object_data *obj;
  80         struct cds_lfht *channels; /* Registered channels */
  81         struct cds_lfht_node node;
  82 };
  83
  84 /*
  85  * Registered traceable applications. Libust registers to the session daemon
  86  * and a linked list is kept of all running traceable app.
  87  */
  88 struct ust_app {
  89         pid_t ppid;
  90         uid_t uid;           /* User ID that owns the apps */
  91         gid_t gid;           /* Group ID that owns the apps */
  92         uint32_t v_major;    /* Verion major number */
  93         uint32_t v_minor;    /* Verion minor number */
  94         char name[17];       /* Process name (short) */
  95         struct cds_lfht *sessions;
  96         struct cds_lfht_node node;
  97         struct ust_app_key key;
  98 };
  99
 100 #ifdef HAVE_LIBLTTNG_UST_CTL
 101
 102 int ust_app_register(struct ust_register_msg *msg, int sock);
 103 void ust_app_unregister(int sock);
 104 int ust_app_add_channel(struct ltt_ust_session *usess,
 105                 struct ltt_ust_channel *uchan);
 106 int ust_app_add_event(struct ltt_ust_session *usess,
 107                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 108 unsigned long ust_app_list_count(void);
 109 int ust_app_start_trace(struct ltt_ust_session *usess);
 110 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
 111
 112 void ust_app_clean_list(void);
 113 void ust_app_ht_alloc(void);
 114 struct cds_lfht *ust_app_get_ht(void);
 115 struct ust_app *ust_app_find_by_pid(pid_t pid);
 116
 117 #else /* HAVE_LIBLTTNG_UST_CTL */
 118
 119 static inline
 120 int ust_app_start_trace(struct ltt_ust_session *usess)
 121 {
 122         return -ENOSYS;
 123 }
 124 static inline
 125 int ust_app_register(struct ust_register_msg *msg, int sock)
 126 {
 127         return -ENOSYS;
 128 }
 129 static inline
 130 void ust_app_unregister(int sock)
 131 {
 132 }
 133 static inline
 134 unsigned int ust_app_list_count(void)
 135 {
 136         return 0;
 137 }
 138 static inline
 139 void ust_app_lock_list(void)
 140 {
 141 }
 142 static inline
 143 void ust_app_unlock_list(void)
 144 {
 145 }
 146 static inline
 147 void ust_app_clean_list(void)
 148 {
 149 }
 150 static inline
 151 struct ust_app_list *ust_app_get_list(void)
 152 {
 153         return NULL;
 154 }
 155 static inline
 156 struct ust_app *ust_app_get_by_pid(pid_t pid)
 157 {
 158         return NULL;
 159 }
 160 static inline
 161 int ust_app_add_channel(struct ltt_ust_session *usess,
 162                 struct ltt_ust_channel *uchan)
 163 {
 164         return 0;
 165 }
 166 static inline
 167 int ust_app_add_event(struct ltt_ust_session *usess,
 168                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
 169 {
 170         return -ENOSYS;
 171 }
 172 static inline
 173 struct cds_lfht *ust_app_get_ht(void)
 174 {
 175         return NULL;
 176 }
 177 static inline
 178 void ust_app_ht_alloc(void)
 179 {
 180 }
 181 static inline
 182 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
 183 {
 184 }
 185
 186 #endif /* HAVE_LIBLTTNG_UST_CTL */
 187
 188 #endif /* _LTT_UST_APP_H */