void netif_carrier_on(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
linkwatch_fire_event(dev);
if (netif_running(dev))
__netdev_watchdog_up(dev);
}
int register_vlan_dev(struct net_device *dev)
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
const struct net_device_ops *ops = real_dev->netdev_ops;
u16 vlan_id = vlan->vlan_id;
struct vlan_group *grp, *ngrp = NULL;
int err;
grp = rtnl_dereference(real_dev->vlgrp);
if (!grp) {
ngrp = grp = vlan_group_alloc(real_dev);
if (!grp)
return -ENOBUFS;
err = vlan_gvrp_init_applicant(real_dev);
if (err < 0)
goto out_free_group;
}
err = vlan_group_prealloc_vid(grp, vlan_id);
if (err < 0)
goto out_uninit_applicant;
err = register_netdevice(dev);
if (err < 0)
goto out_uninit_applicant;
/* Account for reference in struct vlan_dev_info */
dev_hold(real_dev);
netif_stacked_transfer_operstate(real_dev, dev);
linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
/* So, got the sucker initialized, now lets place
* it into our local structure.
*/
vlan_group_set_device(grp, vlan_id, dev);
grp->nr_vlans++;
if (ngrp) {
if (ops->ndo_vlan_rx_register)
ops->ndo_vlan_rx_register(real_dev, ngrp);
rcu_assign_pointer(real_dev->vlgrp, ngrp);
}
if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
return 0;
out_uninit_applicant:
if (ngrp)
vlan_gvrp_uninit_applicant(real_dev);
out_free_group:
if (ngrp) {
/* Free the group, after all cpu's are done. */
call_rcu(&ngrp->rcu, vlan_rcu_free);
}
return err;
}
/**
* netif_carrier_off - clear carrier
* @dev: network device
*
* Device has detected loss of carrier.
*/
void netif_carrier_off(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state)) {
if (dev->reg_state == NETREG_UNINITIALIZED)
return;
linkwatch_fire_event(dev);
}
}
/**
* netif_carrier_on - set carrier
* @dev: network device
*
* Device has detected that carrier.
*/
void netif_carrier_on(struct net_device *dev)
{
if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state)) {
if (dev->reg_state == NETREG_UNINITIALIZED)
return;
linkwatch_fire_event(dev);
if (netif_running(dev))
__netdev_watchdog_up(dev);
}
}
int register_vlan_dev(struct net_device *dev)
{
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
struct net_device *real_dev = vlan->real_dev;
u16 vlan_id = vlan->vlan_id;
struct vlan_info *vlan_info;
struct vlan_group *grp;
int err;
err = vlan_vid_add(real_dev, vlan_id);
if (err)
return err;
vlan_info = rtnl_dereference(real_dev->vlan_info);
/* vlan_info should be there now. vlan_vid_add took care of it */
BUG_ON(!vlan_info);
grp = &vlan_info->grp;
if (grp->nr_vlan_devs == 0) {
err = vlan_gvrp_init_applicant(real_dev);
if (err < 0)
goto out_vid_del;
}
err = vlan_group_prealloc_vid(grp, vlan_id);
if (err < 0)
goto out_uninit_applicant;
err = register_netdevice(dev);
if (err < 0)
goto out_uninit_applicant;
/* Account for reference in struct vlan_dev_priv */
dev_hold(real_dev);
netif_stacked_transfer_operstate(real_dev, dev);
linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
/* So, got the sucker initialized, now lets place
* it into our local structure.
*/
vlan_group_set_device(grp, vlan_id, dev);
grp->nr_vlan_devs++;
return 0;
out_uninit_applicant:
if (grp->nr_vlan_devs == 0)
vlan_gvrp_uninit_applicant(real_dev);
out_vid_del:
vlan_vid_del(real_dev, vlan_id);
return err;
}
int register_vlan_dev(struct net_device *dev)
{
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
struct net_device *real_dev = vlan->real_dev;
u16 vlan_id = vlan->vlan_id;
struct vlan_info *vlan_info;
struct vlan_group *grp;
int err;
err = vlan_vid_add(real_dev, vlan_id);
if (err)
return err;
vlan_info = rtnl_dereference(real_dev->vlan_info);
BUG_ON(!vlan_info);
grp = &vlan_info->grp;
if (grp->nr_vlan_devs == 0) {
err = vlan_gvrp_init_applicant(real_dev);
if (err < 0)
goto out_vid_del;
}
err = vlan_group_prealloc_vid(grp, vlan_id);
if (err < 0)
goto out_uninit_applicant;
err = register_netdevice(dev);
if (err < 0)
goto out_uninit_applicant;
dev_hold(real_dev);
netif_stacked_transfer_operstate(real_dev, dev);
linkwatch_fire_event(dev);
vlan_group_set_device(grp, vlan_id, dev);
grp->nr_vlan_devs++;
return 0;
out_uninit_applicant:
if (grp->nr_vlan_devs == 0)
vlan_gvrp_uninit_applicant(real_dev);
out_vid_del:
vlan_vid_del(real_dev, vlan_id);
return err;
}
/**
* netif_carrier_off - clear carrier
* @dev: network device
*
* Device has detected loss of carrier.
*/
void netif_carrier_off(struct net_device *dev)
{
if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
linkwatch_fire_event(dev);
}
/* Attach a VLAN device to a mac address (ie Ethernet Card).
* Returns the device that was created, or NULL if there was
* an error of some kind.
*/
static struct net_device *register_vlan_device(const char *eth_IF_name,
unsigned short VLAN_ID)
{
struct vlan_group *grp, *ngrp = NULL;
struct net_device *new_dev;
struct net_device *real_dev; /* the ethernet device */
char name[IFNAMSIZ];
#ifdef VLAN_DEBUG
printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
__FUNCTION__, eth_IF_name, VLAN_ID);
#endif
if (VLAN_ID >= VLAN_VID_MASK)
goto out_ret_null;
/* find the device relating to eth_IF_name. */
real_dev = dev_get_by_name(eth_IF_name);
if (!real_dev)
goto out_ret_null;
if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
__FUNCTION__, real_dev->name);
goto out_put_dev;
}
if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
(real_dev->vlan_rx_register == NULL ||
real_dev->vlan_rx_kill_vid == NULL)) {
printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
__FUNCTION__, real_dev->name);
goto out_put_dev;
}
if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
(real_dev->vlan_rx_add_vid == NULL ||
real_dev->vlan_rx_kill_vid == NULL)) {
printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
__FUNCTION__, real_dev->name);
goto out_put_dev;
}
/* From this point on, all the data structures must remain
* consistent.
*/
rtnl_lock();
/* The real device must be up and operating in order to
* assosciate a VLAN device with it.
*/
if (!(real_dev->flags & IFF_UP))
goto out_unlock;
if (find_vlan_dev(real_dev, VLAN_ID) != NULL) {
/* was already registered. */
printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
goto out_unlock;
}
/* Gotta set up the fields for the device. */
#ifdef VLAN_DEBUG
printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",
vlan_name_type);
#endif
switch (vlan_name_type) {
case VLAN_NAME_TYPE_RAW_PLUS_VID:
/* name will look like: eth1.0005 */
snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID);
break;
case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
/* Put our vlan.VID in the name.
* Name will look like: vlan5
*/
snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID);
break;
case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
/* Put our vlan.VID in the name.
* Name will look like: eth0.5
*/
snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID);
break;
case VLAN_NAME_TYPE_PLUS_VID:
/* Put our vlan.VID in the name.
* Name will look like: vlan0005
*/
default:
snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID);
};
new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name,
vlan_setup);
if (new_dev == NULL)
goto out_unlock;
/* need 4 bytes for extra VLAN header info,
* hope the underlying device can handle it.
*/
new_dev->mtu = real_dev->mtu;
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
new_dev->priv,
sizeof(struct vlan_dev_info));
#endif
memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len);
memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
new_dev->addr_len = real_dev->addr_len;
if (real_dev->features & NETIF_F_HW_VLAN_TX) {
new_dev->hard_header = real_dev->hard_header;
new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
new_dev->rebuild_header = real_dev->rebuild_header;
} else {
new_dev->hard_header = vlan_dev_hard_header;
new_dev->hard_start_xmit = vlan_dev_hard_start_xmit;
new_dev->rebuild_header = vlan_dev_rebuild_header;
}
new_dev->hard_header_parse = real_dev->hard_header_parse;
VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
VLAN_DEV_INFO(new_dev)->real_dev = real_dev;
VLAN_DEV_INFO(new_dev)->dent = NULL;
VLAN_DEV_INFO(new_dev)->flags = 1;
#ifdef VLAN_DEBUG
printk(VLAN_DBG "About to go find the group for idx: %i\n",
real_dev->ifindex);
#endif
grp = vlan_find_group(real_dev->ifindex);
if (!grp) {
ngrp = grp = vlan_group_alloc(real_dev->ifindex);
if (!grp)
goto out_free_newdev;
}
if (register_netdevice(new_dev))
goto out_free_group;
vlan_transfer_operstate(real_dev, new_dev);
linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */
/* So, got the sucker initialized, now lets place
* it into our local structure.
*/
if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
real_dev->vlan_rx_register(real_dev, ngrp);
vlan_group_set_device(grp, VLAN_ID, new_dev);
if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */
printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
new_dev->name);
if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
real_dev->vlan_rx_add_vid(real_dev, VLAN_ID);
rtnl_unlock();
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new device successfully, returning.\n");
#endif
return new_dev;
out_free_group:
if (ngrp)
vlan_group_free(ngrp);
out_free_newdev:
free_netdev(new_dev);
out_unlock:
rtnl_unlock();
out_put_dev:
dev_put(real_dev);
out_ret_null:
return NULL;
}
