src/lxc/cgroup.h

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <daniel.lezcano at free.fr>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #ifndef __LXC_CGROUP_H
  25 #define __LXC_CGROUP_H
  26
  27 #include <stdbool.h>
  28 #include <stddef.h>
  29 #include <sys/types.h>
  30
  31 struct lxc_handler;
  32 struct lxc_conf;
  33 struct lxc_list;
  34
  35 struct cgroup_ops {
  36         const char *name;
  37
  38         void *(*init)(const char *name);
  39         void (*destroy)(void *hdata);
  40         bool (*create)(void *hdata);
  41         bool (*enter)(void *hdata, pid_t pid);
  42         bool (*create_legacy)(void *hdata, pid_t pid);
  43         const char *(*get_cgroup)(void *hdata, const char *subsystem);
  44         int (*set)(const char *filename, const char *value, const char *name, const char *lxcpath);
  45         int (*get)(const char *filename, char *value, size_t len, const char *name, const char *lxcpath);
  46         bool (*unfreeze)(void *hdata);
  47         bool (*setup_limits)(void *hdata, struct lxc_list *cgroup_conf, bool with_devices);
  48         bool (*chown)(void *hdata, struct lxc_conf *conf);
  49         bool (*attach)(const char *name, const char *lxcpath, pid_t pid);
  50         bool (*mount_cgroup)(void *hdata, const char *root, int type);
  51         int (*nrtasks)(void *hdata);
  52         void (*disconnect)(void);
  53 };
  54
  55 extern bool cgroup_attach(const char *name, const char *lxcpath, pid_t pid);
  56 extern bool cgroup_mount(const char *root, struct lxc_handler *handler, int type);
  57 extern void cgroup_destroy(struct lxc_handler *handler);
  58 extern bool cgroup_init(struct lxc_handler *handler);
  59 extern bool cgroup_create(struct lxc_handler *handler);
  60 extern bool cgroup_setup_limits(struct lxc_handler *handler, bool with_devices);
  61 extern bool cgroup_chown(struct lxc_handler *handler);
  62 extern bool cgroup_enter(struct lxc_handler *handler);
  63 extern void cgroup_cleanup(struct lxc_handler *handler);
  64 extern bool cgroup_create_legacy(struct lxc_handler *handler);
  65 extern int cgroup_nrtasks(struct lxc_handler *handler);
  66 extern const char *cgroup_get_cgroup(struct lxc_handler *handler, const char *subsystem);
  67 extern bool cgroup_unfreeze(struct lxc_handler *handler);
  68 extern void cgroup_disconnect(void);
  69
  70 #endif