include/namespace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NAMESPACE_H__
   3 #define __NAMESPACE_H__ 1
   4
   5 #include <sched.h>
   6 #include <sys/mount.h>
   7 #include <unistd.h>
   8 #include <sys/syscall.h>
   9 #include <errno.h>
  10
  11 #ifndef NETNS_RUN_DIR
  12 #define NETNS_RUN_DIR "/var/run/netns"
  13 #endif
  14
  15 #ifndef NETNS_ETC_DIR
  16 #define NETNS_ETC_DIR "/etc/netns"
  17 #endif
  18
  19 #ifndef CLONE_NEWNET
  20 #define CLONE_NEWNET 0x40000000 /* New network namespace (lo, device, names sockets, etc) */
  21 #endif
  22
  23 #ifndef MNT_DETACH
  24 #define MNT_DETACH      0x00000002      /* Just detach from the tree */
  25 #endif /* MNT_DETACH */
  26
  27 /* sys/mount.h may be out too old to have these */
  28 #ifndef MS_REC
  29 #define MS_REC          16384
  30 #endif
  31
  32 #ifndef MS_SLAVE
  33 #define MS_SLAVE        (1 << 19)
  34 #endif
  35
  36 #ifndef MS_SHARED
  37 #define MS_SHARED       (1 << 20)
  38 #endif
  39
  40 #ifndef HAVE_SETNS
  41 static inline int setns(int fd, int nstype)
  42 {
  43 #ifdef __NR_setns
  44         return syscall(__NR_setns, fd, nstype);
  45 #else
  46         errno = ENOSYS;
  47         return -1;
  48 #endif
  49 }
  50 #endif /* HAVE_SETNS */
  51
  52 int netns_switch(char *netns);
  53 int netns_get_fd(const char *netns);
  54 int netns_foreach(int (*func)(char *nsname, void *arg), void *arg);
  55
  56 struct netns_func {
  57         int (*func)(char *nsname, void *arg);
  58         void *arg;
  59 };
  60
  61 #endif /* __NAMESPACE_H__ */