diff options
Diffstat (limited to 'include/net/dst_ops.h')
| -rw-r--r-- | include/net/dst_ops.h | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/include/net/dst_ops.h b/include/net/dst_ops.h index d1ff9b7e99b8..51665b3461b8 100644 --- a/include/net/dst_ops.h +++ b/include/net/dst_ops.h @@ -1,6 +1,8 @@ #ifndef _NET_DST_OPS_H #define _NET_DST_OPS_H #include <linux/types.h> +#include <linux/percpu_counter.h> +#include <linux/cache.h> struct dst_entry; struct kmem_cachep; @@ -22,7 +24,41 @@ struct dst_ops { void (*update_pmtu)(struct dst_entry *dst, u32 mtu); int (*local_out)(struct sk_buff *skb); - atomic_t entries; struct kmem_cache *kmem_cachep; + + struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; }; + +static inline int dst_entries_get_fast(struct dst_ops *dst) +{ + return percpu_counter_read_positive(&dst->pcpuc_entries); +} + +static inline int dst_entries_get_slow(struct dst_ops *dst) +{ + int res; + + local_bh_disable(); + res = percpu_counter_sum_positive(&dst->pcpuc_entries); + local_bh_enable(); + return res; +} + +static inline void dst_entries_add(struct dst_ops *dst, int val) +{ + local_bh_disable(); + percpu_counter_add(&dst->pcpuc_entries, val); + local_bh_enable(); +} + +static inline int dst_entries_init(struct dst_ops *dst) +{ + return percpu_counter_init(&dst->pcpuc_entries, 0); +} + +static inline void dst_entries_destroy(struct dst_ops *dst) +{ + percpu_counter_destroy(&dst->pcpuc_entries); +} + #endif |