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net: Introduce VRF related flags and helpers

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Add a VRF_MASTER flag for interfaces and helper functions for determining
if a device is a VRF_MASTER.

Add link attribute for passing VRF_TABLE id.

Add vrf_ptr to netdevice.

Add various macros for determining if a device is a VRF device, the index
of the master VRF device and table associated with VRF device.

Signed-off-by: Shrijeet Mukherjee <shm@cumulusnetworks.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2015-08-13 14:59:00 -06:00
committed by David S. Miller
parent 0344338bd8
commit 4e3c89920c
3 changed files with 168 additions and 0 deletions
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20
include/linux/netdevice.h
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@@ -1289,6 +1289,7 @@ enum netdev_priv_flags {
IFF_XMIT_DST_RELEASE_PERM = 1<<22,
IFF_IPVLAN_MASTER = 1<<23,
IFF_IPVLAN_SLAVE = 1<<24,
IFF_VRF_MASTER = 1<<25,
};
#define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
@@ -1316,6 +1317,7 @@ enum netdev_priv_flags {
#define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
#define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
#define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
#define IFF_VRF_MASTER IFF_VRF_MASTER
/**
* struct net_device - The DEVICE structure.
@@ -1432,6 +1434,7 @@ enum netdev_priv_flags {
* @dn_ptr: DECnet specific data
* @ip6_ptr: IPv6 specific data
* @ax25_ptr: AX.25 specific data
* @vrf_ptr: VRF specific data
* @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
*
* @last_rx: Time of last Rx
@@ -1650,6 +1653,7 @@ struct net_device {
struct dn_dev __rcu *dn_ptr;
struct inet6_dev __rcu *ip6_ptr;
void *ax25_ptr;
struct net_vrf_dev __rcu *vrf_ptr;
struct wireless_dev *ieee80211_ptr;
struct wpan_dev *ieee802154_ptr;
#if IS_ENABLED(CONFIG_MPLS_ROUTING)
@@ -3808,6 +3812,22 @@ static inline bool netif_supports_nofcs(struct net_device *dev)
return dev->priv_flags & IFF_SUPP_NOFCS;
}
static inline bool netif_is_vrf(const struct net_device *dev)
{
return dev->priv_flags & IFF_VRF_MASTER;
}
static inline bool netif_index_is_vrf(struct net *net, int ifindex)
{
struct net_device *dev = dev_get_by_index_rcu(net, ifindex);
bool rc = false;
if (dev)
rc = netif_is_vrf(dev);
return rc;
}
/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
static inline void netif_keep_dst(struct net_device *dev)
{