diff options
| -rw-r--r-- | src/nspawn/nspawn-network.c | 47 | ||||
| -rw-r--r-- | src/nspawn/nspawn-network.h | 2 | ||||
| -rw-r--r-- | src/nspawn/nspawn.c | 2 |
3 files changed, 51 insertions, 0 deletions
diff --git a/src/nspawn/nspawn-network.c b/src/nspawn/nspawn-network.c index 74a0ae865b..f2b7e4dd79 100644 --- a/src/nspawn/nspawn-network.c +++ b/src/nspawn/nspawn-network.c @@ -538,3 +538,50 @@ int veth_extra_parse(char ***l, const char *p) { a = b = NULL; return 0; } + +static int remove_one_veth_link(sd_netlink *rtnl, const char *name) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + int r; + + if (isempty(name)) + return 0; + + r = sd_rtnl_message_new_link(rtnl, &m, RTM_DELLINK, 0); + if (r < 0) + return log_error_errno(r, "Failed to allocate netlink message: %m"); + + r = sd_netlink_message_append_string(m, IFLA_IFNAME, name); + if (r < 0) + return log_error_errno(r, "Failed to add netlink interface name: %m"); + + r = sd_netlink_call(rtnl, m, 0, NULL); + if (r == -ENODEV) /* Already gone */ + return 0; + if (r < 0) + return log_error_errno(r, "Failed to remove veth interface %s: %m", name); + + return 1; +} + +int remove_veth_links(const char *primary, char **pairs) { + _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; + char **a, **b; + int r; + + /* In some cases the kernel might pin the veth links between host and container even after the namespace + * died. Hence, let's better remove them explicitly too. */ + + if (isempty(primary) && strv_isempty(pairs)) + return 0; + + r = sd_netlink_open(&rtnl); + if (r < 0) + return log_error_errno(r, "Failed to connect to netlink: %m"); + + remove_one_veth_link(rtnl, primary); + + STRV_FOREACH_PAIR(a, b, pairs) + remove_one_veth_link(rtnl, *a); + + return 0; +} diff --git a/src/nspawn/nspawn-network.h b/src/nspawn/nspawn-network.h index 9ab1606d1c..c5036ab470 100644 --- a/src/nspawn/nspawn-network.h +++ b/src/nspawn/nspawn-network.h @@ -34,3 +34,5 @@ int setup_ipvlan(const char *machine_name, pid_t pid, char **ifaces); int move_network_interfaces(pid_t pid, char **ifaces); int veth_extra_parse(char ***l, const char *p); + +int remove_veth_links(const char *primary, char **pairs); diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index e1d37d383a..d687df8a09 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -3713,6 +3713,7 @@ int main(int argc, char *argv[]) { } expose_port_flush(arg_expose_ports, &exposed); + (void) remove_veth_links(veth_name, arg_network_veth_extra); } finish: @@ -3745,6 +3746,7 @@ finish: } expose_port_flush(arg_expose_ports, &exposed); + (void) remove_veth_links(veth_name, arg_network_veth_extra); free(arg_directory); free(arg_template); |