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net: export netdev_next_lower_dev_rcu()

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netdev_next_lower_dev_rcu() will be used to implement a function,
which is to walk all lower interfaces.
There are already functions that they walk their lower interface.
(netdev_walk_all_lower_dev_rcu, netdev_walk_all_lower_dev()).
But, there would be cases that couldn't be covered by given
netdev_walk_all_lower_dev_{rcu}() function.
So, some modules would want to implement own function,
which is to walk all lower interfaces.

In the next patch, netdev_next_lower_dev_rcu() will be used.
In addition, this patch removes two unused prototypes in netdevice.h.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taehee Yoo 2020-02-15 10:50:21 +00:00 committed by David S. Miller
parent 064ff66e2b
commit 7151affeef
2 changed files with 6 additions and 7 deletions
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7
include/linux/netdevice.h
View File

@ -72,6 +72,8 @@ void netdev_set_default_ethtool_ops(struct net_device *dev,
#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
#define NET_RX_DROP 1 /* packet dropped */
#define MAX_NEST_DEV 8
/*
* Transmit return codes: transmit return codes originate from three different
* namespaces:
@ -4389,11 +4391,8 @@ void *netdev_lower_get_next(struct net_device *dev,
ldev; \
ldev = netdev_lower_get_next(dev, &(iter)))
struct net_device *netdev_all_lower_get_next(struct net_device *dev,
struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
struct list_head **iter);
struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
struct list_head **iter);
int netdev_walk_all_lower_dev(struct net_device *dev,
int (*fn)(struct net_device *lower_dev,
void *data),

6
net/core/dev.c
View File

@ -146,7 +146,6 @@
#include "net-sysfs.h"
#define MAX_GRO_SKBS 8
#define MAX_NEST_DEV 8
/* This should be increased if a protocol with a bigger head is added. */
#define GRO_MAX_HEAD (MAX_HEADER + 128)
@ -7207,8 +7206,8 @@ static int __netdev_walk_all_lower_dev(struct net_device *dev,
return 0;
}
static struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
struct list_head **iter)
struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
struct list_head **iter)
{
struct netdev_adjacent *lower;
@ -7220,6 +7219,7 @@ static struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
return lower->dev;
}
EXPORT_SYMBOL(netdev_next_lower_dev_rcu);
static u8 __netdev_upper_depth(struct net_device *dev)
{