src/lxc/commands.h

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2009
   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_COMMANDS_H
  25 #define __LXC_COMMANDS_H
  26
  27 #include "state.h"
  28
  29 #define LXC_CMD_DATA_MAX (MAXPATHLEN*2)
  30
  31 /* https://developer.gnome.org/glib/2.28/glib-Type-Conversion-Macros.html */
  32 #define INT_TO_PTR(n) ((void *) (long) (n))
  33 #define PTR_TO_INT(p) ((int) (long) (p))
  34
  35 typedef enum {
  36         LXC_CMD_CONSOLE,
  37         LXC_CMD_CONSOLE_WINCH,
  38         LXC_CMD_STOP,
  39         LXC_CMD_GET_STATE,
  40         LXC_CMD_GET_INIT_PID,
  41         LXC_CMD_GET_CLONE_FLAGS,
  42         LXC_CMD_GET_CGROUP,
  43         LXC_CMD_GET_CONFIG_ITEM,
  44         LXC_CMD_MAX,
  45 } lxc_cmd_t;
  46
  47 struct lxc_cmd_req {
  48         lxc_cmd_t cmd;
  49         int datalen;
  50         const void *data;
  51 };
  52
  53 struct lxc_cmd_rsp {
  54         int ret; /* 0 on success, -errno on failure */
  55         int datalen;
  56         void *data;
  57 };
  58
  59 struct lxc_cmd_rr {
  60         struct lxc_cmd_req req;
  61         struct lxc_cmd_rsp rsp;
  62 };
  63
  64 struct lxc_cmd_console_rsp_data {
  65         int masterfd;
  66         int ttynum;
  67 };
  68
  69 extern int lxc_cmd_console_winch(const char *name, const char *lxcpath);
  70 extern int lxc_cmd_console(const char *name, int *ttynum, int *fd,
  71                            const char *lxcpath);
  72 /*
  73  * Get the 'real' cgroup path (as seen in /proc/self/cgroup) for a container
  74  * for a particular subsystem
  75  */
  76 extern char *lxc_cmd_get_cgroup_path(const char *name, const char *lxcpath,
  77                         const char *subsystem);
  78 extern int lxc_cmd_get_clone_flags(const char *name, const char *lxcpath);
  79 extern char *lxc_cmd_get_config_item(const char *name, const char *item, const char *lxcpath);
  80 extern pid_t lxc_cmd_get_init_pid(const char *name, const char *lxcpath);
  81 extern lxc_state_t lxc_cmd_get_state(const char *name, const char *lxcpath);
  82 extern int lxc_cmd_stop(const char *name, const char *lxcpath);
  83
  84 struct lxc_epoll_descr;
  85 struct lxc_handler;
  86
  87 extern int lxc_cmd_init(const char *name, struct lxc_handler *handler,
  88                             const char *lxcpath);
  89 extern int lxc_cmd_mainloop_add(const char *name, struct lxc_epoll_descr *descr,
  90                                     struct lxc_handler *handler);
  91 extern int lxc_try_cmd(const char *name, const char *lxcpath);
  92
  93 #endif /* __commands_h */