interface: allow renaming interface when moving to jail netns

Introduce jail_ifname option to define the name of a Linux network
interface when moved into a jail's network namespace.
This is useful for containers which expect the network interface to
have a specific name (eg. 'host0' in case of systemd).
While at it, clean-up and fix bugs in jail interface up/down routines.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/system.h b/system.h
index fe4497e..f8f8ec1 100644
--- a/system.h
+++ b/system.h
@@ -243,7 +243,7 @@ void system_fd_set_cloexec(int fd);
 
 int system_update_ipv6_mtu(struct device *dev, int mtu);
 
-int system_link_netns_move(const char *ifname, const pid_t target_ns);
+int system_link_netns_move(const char *ifname, const pid_t target_ns, const char *target_ifname);
 int system_netns_open(const pid_t target_ns);
 int system_netns_set(int netns_fd);