cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dst_ops.h (2119B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _NET_DST_OPS_H
      3#define _NET_DST_OPS_H
      4#include <linux/types.h>
      5#include <linux/percpu_counter.h>
      6#include <linux/cache.h>
      7
      8struct dst_entry;
      9struct kmem_cachep;
     10struct net_device;
     11struct sk_buff;
     12struct sock;
     13struct net;
     14
     15struct dst_ops {
     16	unsigned short		family;
     17	unsigned int		gc_thresh;
     18
     19	int			(*gc)(struct dst_ops *ops);
     20	struct dst_entry *	(*check)(struct dst_entry *, __u32 cookie);
     21	unsigned int		(*default_advmss)(const struct dst_entry *);
     22	unsigned int		(*mtu)(const struct dst_entry *);
     23	u32 *			(*cow_metrics)(struct dst_entry *, unsigned long);
     24	void			(*destroy)(struct dst_entry *);
     25	void			(*ifdown)(struct dst_entry *,
     26					  struct net_device *dev, int how);
     27	struct dst_entry *	(*negative_advice)(struct dst_entry *);
     28	void			(*link_failure)(struct sk_buff *);
     29	void			(*update_pmtu)(struct dst_entry *dst, struct sock *sk,
     30					       struct sk_buff *skb, u32 mtu,
     31					       bool confirm_neigh);
     32	void			(*redirect)(struct dst_entry *dst, struct sock *sk,
     33					    struct sk_buff *skb);
     34	int			(*local_out)(struct net *net, struct sock *sk, struct sk_buff *skb);
     35	struct neighbour *	(*neigh_lookup)(const struct dst_entry *dst,
     36						struct sk_buff *skb,
     37						const void *daddr);
     38	void			(*confirm_neigh)(const struct dst_entry *dst,
     39						 const void *daddr);
     40
     41	struct kmem_cache	*kmem_cachep;
     42
     43	struct percpu_counter	pcpuc_entries ____cacheline_aligned_in_smp;
     44};
     45
     46static inline int dst_entries_get_fast(struct dst_ops *dst)
     47{
     48	return percpu_counter_read_positive(&dst->pcpuc_entries);
     49}
     50
     51static inline int dst_entries_get_slow(struct dst_ops *dst)
     52{
     53	return percpu_counter_sum_positive(&dst->pcpuc_entries);
     54}
     55
     56#define DST_PERCPU_COUNTER_BATCH 32
     57static inline void dst_entries_add(struct dst_ops *dst, int val)
     58{
     59	percpu_counter_add_batch(&dst->pcpuc_entries, val,
     60				 DST_PERCPU_COUNTER_BATCH);
     61}
     62
     63static inline int dst_entries_init(struct dst_ops *dst)
     64{
     65	return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL);
     66}
     67
     68static inline void dst_entries_destroy(struct dst_ops *dst)
     69{
     70	percpu_counter_destroy(&dst->pcpuc_entries);
     71}
     72
     73#endif