src/lxc/namespace.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 __namespace_h
  24 #define __namespace_h
  25
  26 #include <syscall.h>
  27 #ifndef CLONE_FS
  28 #  define CLONE_FS                0x00000200
  29 #endif
  30 #ifndef CLONE_NEWNS
  31 #  define CLONE_NEWNS             0x00020000
  32 #endif
  33 #ifndef CLONE_NEWUTS
  34 #  define CLONE_NEWUTS            0x04000000
  35 #endif
  36 #ifndef CLONE_NEWIPC
  37 #  define CLONE_NEWIPC            0x08000000
  38 #endif
  39 #ifndef CLONE_NEWUSER
  40 #  define CLONE_NEWUSER           0x10000000
  41 #endif
  42 #ifndef CLONE_NEWPID
  43 #  define CLONE_NEWPID            0x20000000
  44 #endif
  45 #ifndef CLONE_NEWNET
  46 #  define CLONE_NEWNET            0x40000000
  47 #endif
  48 #ifndef __NR_unshare
  49 #  ifdef __i386__
  50 #    define __NR_unshare 310
  51 #  elif __x86_64__
  52 #    define __NR_unshare 272
  53 #  elif __ia64__
  54 #    define __NR_unshare 1296
  55 #  elif __s390__
  56 #    define __NR_unshare 303
  57 #  elif __powerpc__
  58 #    define __NR_unshare 282
  59 #else
  60 #    error "unsupported architecture"
  61 #  endif
  62 #endif
  63 #if __i386__ || __x86_64__ || __powerpc__
  64 #   define fork_ns(flags) syscall(SYS_clone, flags|SIGCHLD, NULL)
  65 #elif __s390__
  66 #   define fork_ns(flags) syscall(SYS_clone, NULL, flags|SIGCHLD)
  67 #elif __ia64__
  68 #   define fork_ns(flags) syscall(SYS_clone2, flags|SIGCHLD, NULL)
  69 #else
  70 #   error "unsupported architecture"
  71 #endif
  72 #define unshare_ns(flags) syscall(__NR_unshare, flags, NULL)
  73 #endif