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nspawn: when adding a veth interface to a bridge, use the "vb-" rather than "ve-" interface name prefix

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This way we can recognize the interfaces later on to apply different
host-side configuration to them.
This commit is contained in:
Lennart Poettering 2014-02-21 04:02:12 +01:00
parent 90e633a790
commit 08af0da269
2 changed files with 20 additions and 9 deletions
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18
man/systemd-nspawn.xml
View File

@ -321,13 +321,17 @@
<varlistentry>
<term><option>--network-bridge=</option></term>
<listitem><para>Adds the host side of the
Ethernet link created with
<option>--network-veth</option>
to the specified bridge. Note that
<option>--network-bridge</option>
<listitem><para>Adds the host side of
the Ethernet link created with
<option>--network-veth</option> to the
specified bridge. Note that
<option>--network-bridge=</option>
implies
<option>--network-veth</option>.</para></listitem>
<option>--network-veth</option>. If
this option is used the host side of
the Ethernet link will use the
<literal>vb-</literal> prefix instead
of <literal>ve-</literal>.</para></listitem>
</varlistentry>
<varlistentry>
@ -466,7 +470,7 @@
destination in the container. The
<option>--bind-ro=</option> option
creates read-only bind
mount.</para></listitem>
mounts.</para></listitem>
</varlistentry>
<varlistentry>

11
src/nspawn/nspawn.c
View File

@ -1302,7 +1302,7 @@ static int reset_audit_loginuid(void) {
return 0;
}
static int setup_veth(pid_t pid, char iface_name[]) {
static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ]) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
int r;
@ -1313,6 +1313,13 @@ static int setup_veth(pid_t pid, char iface_name[]) {
if (!arg_network_veth)
return 0;
/* Use two different interface name prefixes depending whether
* we are in bridge mode or not. */
if (arg_network_bridge)
memcpy(iface_name, "vb-", 3);
else
memcpy(iface_name, "ve-", 3);
strncpy(iface_name+3, arg_machine, IFNAMSIZ - 3);
r = sd_rtnl_open(&rtnl, 0);
@ -1587,7 +1594,7 @@ int main(int argc, char *argv[]) {
int n_fd_passed;
pid_t pid = 0;
sigset_t mask;
char veth_name[IFNAMSIZ] = "ve-";
char veth_name[IFNAMSIZ];
log_parse_environment();
log_open();