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vlan: create/delete kernel vlan device

Browse source 
We make use of libnl (>=3.2.1) to create/delete kernel vlan device,
and it can set vlan id, vlan flags and ingress/egress priority mapping.

V3:
1 nm_netlink_iface_to_index() should use slave name

V2:
1 use existing nm_netlink_iface_to_index()

Signed-off-by: Weiping Pan <wpan@redhat.com>
This commit is contained in:
Weiping Pan 2011-12-12 22:20:57 -05:00 • committed by Dan Williams
parent b2d9fa2ecd
commit ab43b7b41d
2 changed files with 156 additions and 0 deletions
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152
src/nm-system.c
View file

@ -59,6 +59,7 @@
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/route/link.h>
#include <netlink/route/link/vlan.h>
#ifdef HAVE_LIBNL3
#include <netlink/route/link/bonding.h>
@ -1528,3 +1529,154 @@ out:
return res;
}
static void ingress_priority_iterator (gpointer data, gpointer user_data)
{
struct rtnl_link *new_link = user_data;
vlan_priority_map *item = data;
g_return_if_fail (item != NULL);
g_return_if_fail (new_link != NULL);
if ((item->from < 0) || (item->from > 7))
return;
rtnl_link_vlan_set_ingress_map (new_link, item->from, item->to);
}
static void egress_priority_iterator(gpointer data, gpointer user_data)
{
struct rtnl_link *new_link = user_data;
vlan_priority_map *item = data;
g_return_if_fail (item != NULL);
g_return_if_fail (new_link != NULL);
if ((item->to < 0) || (item->to > 7))
return;
rtnl_link_vlan_set_egress_map (new_link, item->from, item->to);
}
/**
* nm_system_add_vlan_device:
* @setting: NMSettingVlan
*
* Add a VLAN device specified in @setting.
*
* Returns: %TRUE on success, or %FALSE
*/
gboolean
nm_system_add_vlan_device (NMSettingVlan *setting)
{
int ret = 0;
int if_index = 0;
struct rtnl_link *new_link = NULL;
struct nl_sock *nlh = NULL;
const GSList *list = NULL;
const char *interface_name = NULL;
const char *vlan_slave = NULL;
guint32 vlan_id = 0;
guint32 vlan_flags = 0;
g_return_val_if_fail (NM_IS_SETTING_VLAN (setting), FALSE);
vlan_slave = nm_setting_vlan_get_slave (setting);
g_return_val_if_fail (vlan_slave != NULL, FALSE);
vlan_id = nm_setting_vlan_get_id (setting);
g_return_val_if_fail (vlan_id != 0, FALSE);
g_return_val_if_fail (vlan_id < 4096, FALSE);
nlh = nm_netlink_get_default_handle ();
g_return_val_if_fail (nlh != NULL, FALSE);
interface_name = nm_setting_vlan_get_interface_name (setting);
g_return_val_if_fail (interface_name != NULL, FALSE);
if_index = nm_netlink_iface_to_index (vlan_slave);
g_return_val_if_fail (if_index > 0, FALSE);
new_link = rtnl_link_alloc ();
g_return_val_if_fail (new_link != NULL, FALSE);
ret = rtnl_link_set_type (new_link, "vlan");
if (ret < 0)
goto free_new_link;
rtnl_link_set_link (new_link, if_index);
rtnl_link_set_name (new_link, interface_name);
rtnl_link_vlan_set_id (new_link, vlan_id);
vlan_flags = nm_setting_vlan_get_flags (setting);
if (vlan_flags)
rtnl_link_vlan_set_flags (new_link, vlan_flags);
list = nm_setting_vlan_get_ingress_priority_map (setting);
if (list != NULL)
g_slist_foreach ((GSList *)list, (GFunc)ingress_priority_iterator, new_link);
list = nm_setting_vlan_get_egress_priority_map (setting);
if (list != NULL)
g_slist_foreach((GSList *)list, (GFunc)egress_priority_iterator, new_link);
ret = rtnl_link_add (nlh, new_link, NLM_F_CREATE);
if (ret < 0)
goto free_new_link;
rtnl_link_put (new_link);
return TRUE;
free_new_link:
rtnl_link_put (new_link);
return FALSE;
}
/**
* nm_system_del_vlan_device:
* @setting: NMSettingVlan
*
* Delete a VLAN device specified in @setting.
*
* Returns: %TRUE on success, or %FALSE
*/
gboolean
nm_system_del_vlan_device (NMSettingVlan *setting)
{
int ret = 0;
struct nl_sock *nlh = NULL;
struct nl_cache *cache = NULL;
struct rtnl_link *new_link = NULL;
const char *interface_name = NULL;
interface_name = nm_setting_vlan_get_interface_name (setting);
g_return_val_if_fail (interface_name != NULL, FALSE);
nlh = nm_netlink_get_default_handle ();
g_return_val_if_fail (nlh != NULL, FALSE);
ret = rtnl_link_alloc_cache (nlh, &cache);
g_return_val_if_fail (ret == 0, FALSE);
g_return_val_if_fail (cache != NULL, FALSE);
new_link = rtnl_link_get_by_name (cache, interface_name);
if (!new_link)
goto free_cache;
ret = rtnl_link_delete (nlh, new_link);
if (ret < 0)
goto free_new_link;
rtnl_link_put (new_link);
return TRUE;
free_new_link:
rtnl_link_put (new_link);
free_cache:
nl_cache_free (cache);
return FALSE;
}

4
src/nm-system.h
View file

@ -31,6 +31,7 @@
#include "nm-device.h"
#include "nm-ip4-config.h"
#include "nm-setting-bond.h"
#include "nm-setting-vlan.h"
/* Prototypes for system/distribution dependent functions,
* implemented in the backend files in backends/ directory
@ -102,4 +103,7 @@ enum {
int nm_system_get_iface_type (int ifindex, const char *name);
gboolean nm_system_add_vlan_device (NMSettingVlan *setting);
gboolean nm_system_del_vlan_device (NMSettingVlan *setting);
#endif