src/lxc/conf.h

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <dlezcano at fr.ibm.com>
   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #ifndef _conf_h
  24 #define _conf_h
  25
  26 #include <netinet/in.h>
  27 #include <sys/param.h>
  28
  29 #include <lxc/list.h>
  30
  31 enum {
  32         EMPTY,
  33         VETH,
  34         MACVLAN,
  35         PHYS,
  36         VLAN,
  37         MAXCONFTYPE,
  38 };
  39
  40 /*
  41  * Defines the structure to configure an ipv4 address
  42  * @address   : ipv4 address
  43  * @broadcast : ipv4 broadcast address
  44  * @mask      : network mask
  45  */
  46 struct lxc_inetdev {
  47         struct in_addr addr;
  48         struct in_addr bcast;
  49         int prefix;
  50 };
  51
  52 struct lxc_route {
  53         struct in_addr addr;
  54 };
  55
  56 /*
  57  * Defines the structure to configure an ipv6 address
  58  * @flags     : set the address up
  59  * @address   : ipv6 address
  60  * @broadcast : ipv6 broadcast address
  61  * @mask      : network mask
  62  */
  63 struct lxc_inet6dev {
  64         struct in6_addr addr;
  65         struct in6_addr bcast;
  66         struct in6_addr acast;
  67         int prefix;
  68 };
  69
  70 struct lxc_route6 {
  71         struct in6_addr addr;
  72 };
  73
  74 struct ifla_veth {
  75         char *pair; /* pair name */
  76 };
  77
  78 struct ifla_vlan {
  79         uint   flags;
  80         uint   fmask;
  81         ushort   vid;
  82         ushort   pad;
  83 };
  84
  85 struct ifla_macvlan {
  86         int mode; /* private, vepa, bridge */
  87 };
  88
  89 union netdev_p {
  90         struct ifla_veth veth_attr;
  91         struct ifla_vlan vlan_attr;
  92         struct ifla_macvlan macvlan_attr;
  93 };
  94
  95 /*
  96  * Defines a structure to configure a network device
  97  * @link   : lxc.network.link, name of bridge or host iface to attach if any
  98  * @name   : lxc.network.name, name of iface on the container side
  99  * @flags  : flag of the network device (IFF_UP, ... )
 100  * @ipv4   : a list of ipv4 addresses to be set on the network device
 101  * @ipv6   : a list of ipv6 addresses to be set on the network device
 102  */
 103 struct lxc_netdev {
 104         int type;
 105         int flags;
 106         int ifindex;
 107         char *link;
 108         char *name;
 109         char *hwaddr;
 110         char *mtu;
 111         union netdev_p priv;
 112         struct lxc_list ipv4;
 113         struct lxc_list ipv6;
 114 };
 115
 116 /*
 117  * Defines a generic struct to configure the control group.
 118  * It is up to the programmer to specify the right subsystem.
 119  * @subsystem : the targetted subsystem
 120  * @value     : the value to set
 121  */
 122 struct lxc_cgroup {
 123         char *subsystem;
 124         char *value;
 125 };
 126
 127 /*
 128  * Defines a structure containing a pty information for
 129  * virtualizing a tty
 130  * @name   : the path name of the slave pty side
 131  * @master : the file descriptor of the master
 132  * @slave  : the file descriptor of the slave
 133  */
 134 struct lxc_pty_info {
 135         char name[MAXPATHLEN];
 136         int master;
 137         int slave;
 138         int busy;
 139 };
 140
 141 /*
 142  * Defines the number of tty configured and contains the
 143  * instanciated ptys
 144  * @nbtty = number of configured ttys
 145  */
 146 struct lxc_tty_info {
 147         int nbtty;
 148         struct lxc_pty_info *pty_info;
 149 };
 150
 151 /*
 152  * Defines the global container configuration
 153  * @rootfs  : the root directory to run the container
 154  * @mount   : the list of mount points
 155  * @network : the network configuration
 156  * @utsname : the container utsname
 157  */
 158 struct lxc_conf {
 159         char *rootfs;
 160         char *fstab;
 161         int tty;
 162         int pts;
 163         struct utsname *utsname;
 164         struct lxc_list cgroup;
 165         struct lxc_list network;
 166         struct lxc_list mount_list;
 167         struct lxc_tty_info tty_info;
 168         char console[MAXPATHLEN];
 169 };
 170
 171 /*
 172  * Initialize the lxc configuration structure
 173  */
 174 extern struct lxc_conf *lxc_conf_init(void);
 175
 176 extern int lxc_create_network(struct lxc_list *networks);
 177 extern int lxc_assign_network(struct lxc_list *networks, pid_t pid);
 178
 179 extern int lxc_create_tty(const char *name, struct lxc_conf *conf);
 180 extern void lxc_delete_tty(struct lxc_tty_info *tty_info);
 181
 182 /*
 183  * Configure the container from inside
 184  */
 185
 186 struct lxc_handler;
 187
 188 extern int lxc_setup(const char *name, struct lxc_conf *lxc_conf);
 189
 190 extern int conf_has(const char *name, const char *info);
 191
 192 #define conf_has_fstab(__name)   conf_has(__name, "fstab")
 193 #define conf_has_rootfs(__name)  conf_has(__name, "rootfs")
 194 #define conf_has_utsname(__name) conf_has(__name, "utsname")
 195 #define conf_has_network(__name) conf_has(__name, "network")
 196 #define conf_has_console(__name) conf_has(__name, "console")
 197 #define conf_has_cgroup(__name)  conf_has(__name, "cgroup")
 198 #define conf_has_tty(__name)     conf_has(__name, "tty")
 199 #define conf_has_pts(__name)     conf_has(__name, "pts")
 200 #endif