diff options
Diffstat (limited to 'include/net/inetpeer.h')
| -rw-r--r-- | include/net/inetpeer.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h new file mode 100644 index 00000000000..7fda471002b --- /dev/null +++ b/include/net/inetpeer.h @@ -0,0 +1,66 @@ +/* + * INETPEER - A storage for permanent information about peers + * + * Version: $Id: inetpeer.h,v 1.2 2002/01/12 07:54:56 davem Exp $ + * + * Authors: Andrey V. Savochkin <saw@msu.ru> + */ + +#ifndef _NET_INETPEER_H +#define _NET_INETPEER_H + +#include <linux/types.h> +#include <linux/init.h> +#include <linux/jiffies.h> +#include <linux/spinlock.h> +#include <asm/atomic.h> + +struct inet_peer +{ + struct inet_peer *avl_left, *avl_right; + struct inet_peer *unused_next, **unused_prevp; + unsigned long dtime; /* the time of last use of not + * referenced entries */ + atomic_t refcnt; + __u32 v4daddr; /* peer's address */ + __u16 avl_height; + __u16 ip_id_count; /* IP ID for the next packet */ + __u32 tcp_ts; + unsigned long tcp_ts_stamp; +}; + +void inet_initpeers(void) __init; + +/* can be called with or without local BH being disabled */ +struct inet_peer *inet_getpeer(__u32 daddr, int create); + +extern spinlock_t inet_peer_unused_lock; +extern struct inet_peer **inet_peer_unused_tailp; +/* can be called from BH context or outside */ +static inline void inet_putpeer(struct inet_peer *p) +{ + spin_lock_bh(&inet_peer_unused_lock); + if (atomic_dec_and_test(&p->refcnt)) { + p->unused_prevp = inet_peer_unused_tailp; + p->unused_next = NULL; + *inet_peer_unused_tailp = p; + inet_peer_unused_tailp = &p->unused_next; + p->dtime = jiffies; + } + spin_unlock_bh(&inet_peer_unused_lock); +} + +extern spinlock_t inet_peer_idlock; +/* can be called with or without local BH being disabled */ +static inline __u16 inet_getid(struct inet_peer *p, int more) +{ + __u16 id; + + spin_lock_bh(&inet_peer_idlock); + id = p->ip_id_count; + p->ip_id_count += 1 + more; + spin_unlock_bh(&inet_peer_idlock); + return id; +} + +#endif /* _NET_INETPEER_H */ |