mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-28 16:52:18 +00:00
09eed1192c
rcu_bh is no longer a win, especially for objects freed with standard call_rcu(). Switch neighbour code to no longer disable BH when not necessary. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* linux/net/inet/arp.h */
|
|
#ifndef _ARP_H
|
|
#define _ARP_H
|
|
|
|
#include <linux/if_arp.h>
|
|
#include <linux/hash.h>
|
|
#include <net/neighbour.h>
|
|
|
|
|
|
extern struct neigh_table arp_tbl;
|
|
|
|
static inline u32 arp_hashfn(const void *pkey, const struct net_device *dev, u32 *hash_rnd)
|
|
{
|
|
u32 key = *(const u32 *)pkey;
|
|
u32 val = key ^ hash32_ptr(dev);
|
|
|
|
return val * hash_rnd[0];
|
|
}
|
|
|
|
#ifdef CONFIG_INET
|
|
static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
|
|
{
|
|
if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
|
|
key = INADDR_ANY;
|
|
|
|
return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev);
|
|
}
|
|
#else
|
|
static inline
|
|
struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
static inline struct neighbour *__ipv4_neigh_lookup(struct net_device *dev, u32 key)
|
|
{
|
|
struct neighbour *n;
|
|
|
|
rcu_read_lock();
|
|
n = __ipv4_neigh_lookup_noref(dev, key);
|
|
if (n && !refcount_inc_not_zero(&n->refcnt))
|
|
n = NULL;
|
|
rcu_read_unlock();
|
|
|
|
return n;
|
|
}
|
|
|
|
static inline void __ipv4_confirm_neigh(struct net_device *dev, u32 key)
|
|
{
|
|
struct neighbour *n;
|
|
|
|
rcu_read_lock();
|
|
n = __ipv4_neigh_lookup_noref(dev, key);
|
|
neigh_confirm(n);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
void arp_init(void);
|
|
int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg);
|
|
void arp_send(int type, int ptype, __be32 dest_ip,
|
|
struct net_device *dev, __be32 src_ip,
|
|
const unsigned char *dest_hw,
|
|
const unsigned char *src_hw, const unsigned char *th);
|
|
int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir);
|
|
void arp_ifdown(struct net_device *dev);
|
|
int arp_invalidate(struct net_device *dev, __be32 ip, bool force);
|
|
|
|
struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
|
|
struct net_device *dev, __be32 src_ip,
|
|
const unsigned char *dest_hw,
|
|
const unsigned char *src_hw,
|
|
const unsigned char *target_hw);
|
|
void arp_xmit(struct sk_buff *skb);
|
|
|
|
#endif /* _ARP_H */
|