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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155/* SPDX-License-Identifier: GPL-2.0 *//* * INETPEER - A storage for permanent information about peers * * 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 <linux/rtnetlink.h>#include <net/ipv6.h>#include <linux/atomic.h>
/* IPv4 address key for cache lookups */struct ipv4_addr_key { __be32 addr; int vif;};
#define INETPEER_MAXKEYSZ (sizeof(struct in6_addr) / sizeof(u32))
struct inetpeer_addr { union { struct ipv4_addr_key a4; struct in6_addr a6; u32 key[INETPEER_MAXKEYSZ]; }; __u16 family;};
struct inet_peer { struct rb_node rb_node; u64 hash; struct inetpeer_addr daddr;
u32 metrics[RTAX_MAX]; u32 rate_tokens; /* rate limiting for ICMP */ u32 n_redirects; unsigned long rate_last; /* * Once inet_peer is queued for deletion (refcnt == 0), following field * is not available: rid * We can share memory with rcu_head to help keep inet_peer small. */ union { struct { atomic_t rid; /* Frag reception counter */ }; struct rcu_head rcu; };
/* following fields might be frequently dirtied */ __u32 dtime; /* the time of last use of not referenced entries */ refcount_t refcnt;};
struct inet_peer_base { struct rb_root rb_root; seqlock_t lock; int total;};
void inet_peer_base_init(struct inet_peer_base *);
void inet_initpeers(void) __init;
#define INETPEER_METRICS_NEW (~(u32) 0)
static inline void inetpeer_set_addr_v4(struct inetpeer_addr *iaddr, __be32 ip){ iaddr->a4.addr = ip; iaddr->a4.vif = 0; iaddr->family = AF_INET;}
static inline __be32 inetpeer_get_addr_v4(struct inetpeer_addr *iaddr){ return iaddr->a4.addr;}
static inline void inetpeer_set_addr_v6(struct inetpeer_addr *iaddr, struct in6_addr *in6){ iaddr->a6 = *in6; iaddr->family = AF_INET6;}
static inline struct in6_addr *inetpeer_get_addr_v6(struct inetpeer_addr *iaddr){ return &iaddr->a6;}
/* can be called with or without local BH being disabled */struct inet_peer *inet_getpeer(struct inet_peer_base *base, const struct inetpeer_addr *daddr);
static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base, __be32 v4daddr, int vif){ struct inetpeer_addr daddr;
daddr.a4.addr = v4daddr; daddr.a4.vif = vif; daddr.family = AF_INET; return inet_getpeer(base, &daddr);}
static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base, const struct in6_addr *v6daddr){ struct inetpeer_addr daddr;
daddr.a6 = *v6daddr; daddr.family = AF_INET6; return inet_getpeer(base, &daddr);}
static inline int inetpeer_addr_cmp(const struct inetpeer_addr *a, const struct inetpeer_addr *b){ int i, n;
if (a->family != b->family) return a->family < b->family ? -1 : 1;
if (a->family == AF_INET) n = sizeof(a->a4) / sizeof(u32); else n = sizeof(a->a6) / sizeof(u32);
for (i = 0; i < n; i++) { if (a->key[i] == b->key[i]) continue; if (a->key[i] < b->key[i]) return -1; return 1; }
return 0;}
/* can be called from BH context or outside */void inet_putpeer(struct inet_peer *p);bool inet_peer_xrlim_allow(struct inet_peer *peer, int timeout);
void inetpeer_invalidate_tree(struct inet_peer_base *);
#endif /* _NET_INETPEER_H */