| 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 _TRACEABLE_APP_H |
| 20 | #define _TRACEABLE_APP_H |
| 21 | |
| 22 | #include <stdint.h> |
| 23 | #include <urcu/list.h> |
| 24 | |
| 25 | /* |
| 26 | * Application registration data structure. |
| 27 | */ |
| 28 | struct ust_register_msg { |
| 29 | uint32_t major; |
| 30 | uint32_t minor; |
| 31 | pid_t pid; |
| 32 | pid_t ppid; |
| 33 | uid_t uid; |
| 34 | gid_t gid; |
| 35 | char name[16]; |
| 36 | }; |
| 37 | |
| 38 | /* |
| 39 | * Traceable application list. |
| 40 | */ |
| 41 | struct ltt_traceable_app_list { |
| 42 | /* |
| 43 | * This lock protects any read/write access to the list and count (which is |
| 44 | * basically the list size). All public functions in traceable-app.c |
| 45 | * acquire this lock and release it before returning. If none of those |
| 46 | * functions are used, the lock MUST be acquired in order to iterate or/and |
| 47 | * do any actions on that list. |
| 48 | */ |
| 49 | pthread_mutex_t lock; |
| 50 | |
| 51 | /* |
| 52 | * Number of element in the list. The session list lock MUST be acquired if |
| 53 | * this counter is used when iterating over the session list. |
| 54 | */ |
| 55 | unsigned int count; |
| 56 | |
| 57 | /* Linked list head */ |
| 58 | struct cds_list_head head; |
| 59 | }; |
| 60 | |
| 61 | /* Registered traceable applications. Libust registers to the session daemon |
| 62 | * and a linked list is kept of all running traceable app. |
| 63 | */ |
| 64 | struct ltt_traceable_app { |
| 65 | int sock; /* Communication socket with the application */ |
| 66 | pid_t pid; |
| 67 | pid_t ppid; |
| 68 | uid_t uid; /* User ID that owns the apps */ |
| 69 | gid_t gid; /* Group ID that owns the apps */ |
| 70 | uint32_t v_major; /* Verion major number */ |
| 71 | uint32_t v_minor; /* Verion minor number */ |
| 72 | char name[17]; /* Process name (short) */ |
| 73 | struct cds_list_head list; |
| 74 | }; |
| 75 | |
| 76 | int register_traceable_app(struct ust_register_msg *msg, int sock); |
| 77 | void unregister_traceable_app(int sock); |
| 78 | unsigned int get_app_count(void); |
| 79 | |
| 80 | void lock_apps_list(void); |
| 81 | void unlock_apps_list(void); |
| 82 | void clean_traceable_apps_list(void); |
| 83 | struct ltt_traceable_app_list *get_traceable_apps_list(void); |
| 84 | |
| 85 | #endif /* _TRACEABLE_APP_H */ |