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dev: introduce dev_get_iflink()

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The goal of this patch is to prepare the removal of the iflink field. It
introduces a new ndo function, which will be implemented by virtual interfaces.

There is no functional change into this patch. All readers of iflink field
now call dev_get_iflink().

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2015-04-02 17:07:00 +02:00 committed by David S. Miller
parent 033f46b3c1
commit a54acb3a6f
11 changed files with 48 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ipvlan/ipvlan_core.c
View File

@ -330,7 +330,7 @@ static int ipvlan_process_v4_outbound(struct sk_buff *skb)
struct rtable *rt;
int err, ret = NET_XMIT_DROP;
struct flowi4 fl4 = {
.flowi4_oif = dev->iflink,
.flowi4_oif = dev_get_iflink(dev),
.flowi4_tos = RT_TOS(ip4h->tos),
.flowi4_flags = FLOWI_FLAG_ANYSRC,
.daddr = ip4h->daddr,

4
include/linux/netdevice.h
View File

@ -1030,6 +1030,8 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
* int queue_index, u32 maxrate);
* Called when a user wants to set a max-rate limitation of specific
* TX queue.
* int (*ndo_get_iflink)(const struct net_device *dev);
* Called to get the iflink value of this device.
*/
struct net_device_ops {
int (*ndo_init)(struct net_device *dev);
@ -1191,6 +1193,7 @@ struct net_device_ops {
int (*ndo_set_tx_maxrate)(struct net_device *dev,
int queue_index,
u32 maxrate);
int (*ndo_get_iflink)(const struct net_device *dev);
};
/**
@ -2149,6 +2152,7 @@ void __dev_remove_pack(struct packet_type *pt);
void dev_add_offload(struct packet_offload *po);
void dev_remove_offload(struct packet_offload *po);
int dev_get_iflink(const struct net_device *dev);
struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
unsigned short mask);
struct net_device *dev_get_by_name(struct net *net, const char *name);

5
net/batman-adv/hard-interface.c
View File

@ -83,11 +83,12 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
return true;
/* no more parents..stop recursion */
if (net_dev->iflink == 0 || net_dev->iflink == net_dev->ifindex)
if (dev_get_iflink(net_dev) == 0 ||
dev_get_iflink(net_dev) == net_dev->ifindex)
return false;
/* recurse over the parent device */
parent_dev = __dev_get_by_index(&init_net, net_dev->iflink);
parent_dev = __dev_get_by_index(&init_net, dev_get_iflink(net_dev));
/* if we got a NULL parent_dev there is something broken.. */
if (WARN(!parent_dev, "Cannot find parent device"))
return false;

4
net/bridge/br_netlink.c
View File

@ -305,8 +305,8 @@ static int br_fill_ifinfo(struct sk_buff *skb,
nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
(dev->addr_len &&
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
(dev->ifindex != dev->iflink &&
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
(dev->ifindex != dev_get_iflink(dev) &&
nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
goto nla_put_failure;
if (event == RTM_NEWLINK && port) {

21
net/core/dev.c
View File

@ -659,6 +659,23 @@ __setup("netdev=", netdev_boot_setup);
*******************************************************************************/
/**
* dev_get_iflink - get 'iflink' value of a interface
* @dev: targeted interface
*
* Indicates the ifindex the interface is linked to.
* Physical interfaces have the same 'ifindex' and 'iflink' values.
*/
int dev_get_iflink(const struct net_device *dev)
{
if (dev->netdev_ops && dev->netdev_ops->ndo_get_iflink)
return dev->netdev_ops->ndo_get_iflink(dev);
return dev->iflink;
}
EXPORT_SYMBOL(dev_get_iflink);
/**
* __dev_get_by_name - find a device by its name
* @net: the applicable net namespace
@ -6345,7 +6362,7 @@ int register_netdevice(struct net_device *dev)
else if (__dev_get_by_index(net, dev->ifindex))
goto err_uninit;
if (dev->iflink == -1)
if (dev_get_iflink(dev) == -1)
dev->iflink = dev->ifindex;
/* Transfer changeable features to wanted_features and enable
@ -7061,7 +7078,7 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
/* If there is an ifindex conflict assign a new one */
if (__dev_get_by_index(net, dev->ifindex)) {
int iflink = (dev->iflink == dev->ifindex);
int iflink = (dev_get_iflink(dev) == dev->ifindex);
dev->ifindex = dev_new_index(net);
if (iflink)
dev->iflink = dev->ifindex;

4
net/core/link_watch.c
View File

@ -40,7 +40,7 @@ static DEFINE_SPINLOCK(lweventlist_lock);
static unsigned char default_operstate(const struct net_device *dev)
{
if (!netif_carrier_ok(dev))
return (dev->ifindex != dev->iflink ?
return (dev->ifindex != dev_get_iflink(dev) ?
IF_OPER_LOWERLAYERDOWN : IF_OPER_DOWN);
if (netif_dormant(dev))
@ -89,7 +89,7 @@ static bool linkwatch_urgent_event(struct net_device *dev)
if (!netif_running(dev))
return false;
if (dev->ifindex != dev->iflink)
if (dev->ifindex != dev_get_iflink(dev))
return true;
if (dev->priv_flags & IFF_TEAM_PORT)

10
net/core/net-sysfs.c
View File

@ -109,11 +109,19 @@ NETDEVICE_SHOW_RO(dev_id, fmt_hex);
NETDEVICE_SHOW_RO(dev_port, fmt_dec);
NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
NETDEVICE_SHOW_RO(addr_len, fmt_dec);
NETDEVICE_SHOW_RO(iflink, fmt_dec);
NETDEVICE_SHOW_RO(ifindex, fmt_dec);
NETDEVICE_SHOW_RO(type, fmt_dec);
NETDEVICE_SHOW_RO(link_mode, fmt_dec);
static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct net_device *ndev = to_net_dev(dev);
return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
}
static DEVICE_ATTR_RO(iflink);
static ssize_t format_name_assign_type(const struct net_device *dev, char *buf)
{
return sprintf(buf, fmt_dec, dev->name_assign_type);

8
net/core/rtnetlink.c
View File

@ -1055,8 +1055,8 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
#ifdef CONFIG_RPS
nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
#endif
(dev->ifindex != dev->iflink &&
nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
(dev->ifindex != dev_get_iflink(dev) &&
nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
(upper_dev &&
nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
@ -2863,8 +2863,8 @@ int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
(dev->addr_len &&
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
(dev->ifindex != dev->iflink &&
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
(dev->ifindex != dev_get_iflink(dev) &&
nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
goto nla_put_failure;
br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);

2
net/ipv4/ipmr.c
View File

@ -801,7 +801,7 @@ static int vif_add(struct net *net, struct mr_table *mrt,
v->pkt_out = 0;
v->link = dev->ifindex;
if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER))
v->link = dev->iflink;
v->link = dev_get_iflink(dev);
/* And finish update writing critical data */
write_lock_bh(&mrt_lock);

4
net/ipv6/addrconf.c
View File

@ -4858,8 +4858,8 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
(dev->addr_len &&
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
(dev->ifindex != dev->iflink &&
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
(dev->ifindex != dev_get_iflink(dev) &&
nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
goto nla_put_failure;
protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
if (!protoinfo)

2
net/ipv6/ip6mr.c
View File

@ -992,7 +992,7 @@ static int mif6_add(struct net *net, struct mr6_table *mrt,
v->pkt_out = 0;
v->link = dev->ifindex;
if (v->flags & MIFF_REGISTER)
v->link = dev->iflink;
v->link = dev_get_iflink(dev);
/* And finish update writing critical data */
write_lock_bh(&mrt_lock);