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