diff options
Diffstat (limited to 'net/ipv4/inetpeer.c')
| -rw-r--r-- | net/ipv4/inetpeer.c | 33 |
1 files changed, 4 insertions, 29 deletions
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c index 000e3d239d6..bd5f5928167 100644 --- a/net/ipv4/inetpeer.c +++ b/net/ipv4/inetpeer.c @@ -26,20 +26,7 @@ * Theory of operations. * We keep one entry for each peer IP address. The nodes contains long-living * information about the peer which doesn't depend on routes. - * At this moment this information consists only of ID field for the next - * outgoing IP packet. This field is incremented with each packet as encoded - * in inet_getid() function (include/net/inetpeer.h). - * At the moment of writing this notes identifier of IP packets is generated - * to be unpredictable using this code only for packets subjected - * (actually or potentially) to defragmentation. I.e. DF packets less than - * PMTU in size uses a constant ID and do not use this code (see - * ip_select_ident() in include/net/ip.h). * - * Route cache entries hold references to our nodes. - * New cache entries get references via lookup by destination IP address in - * the avl tree. The reference is grabbed only when it's needed i.e. only - * when we try to output IP packet which needs an unpredictable ID (see - * __ip_select_ident() in net/ipv4/route.c). * Nodes are removed only when reference counter goes to 0. * When it's happened the node may be removed when a sufficient amount of * time has been passed since its last use. The less-recently-used entry can @@ -62,7 +49,6 @@ * refcnt: atomically against modifications on other CPU; * usually under some other lock to prevent node disappearing * daddr: unchangeable - * ip_id_count: atomic value (no lock needed) */ static struct kmem_cache *peer_cachep __read_mostly; @@ -109,13 +95,6 @@ static inline void flush_check(struct inet_peer_base *base, int family) } } -void inetpeer_invalidate_family(int family) -{ - atomic_t *fp = inetpeer_seq_ptr(family); - - atomic_inc(fp); -} - #define PEER_MAXDEPTH 40 /* sufficient for about 2^27 nodes */ /* Exported for sysctl_net_ipv4. */ @@ -127,7 +106,7 @@ int inet_peer_maxttl __read_mostly = 10 * 60 * HZ; /* usual time to live: 10 min static void inetpeer_gc_worker(struct work_struct *work) { struct inet_peer *p, *n, *c; - LIST_HEAD(list); + struct list_head list; spin_lock_bh(&gc_lock); list_replace_init(&gc_list, &list); @@ -227,7 +206,7 @@ static int addr_compare(const struct inetpeer_addr *a, stackptr = _stack; \ *stackptr++ = &_base->root; \ for (u = rcu_deref_locked(_base->root, _base); \ - u != peer_avl_empty; ) { \ + u != peer_avl_empty;) { \ int cmp = addr_compare(_daddr, &u->daddr); \ if (cmp == 0) \ break; \ @@ -282,7 +261,7 @@ static struct inet_peer *lookup_rcu(const struct inetpeer_addr *daddr, *stackptr++ = &start->avl_left; \ v = &start->avl_left; \ for (u = rcu_deref_locked(*v, base); \ - u->avl_right != peer_avl_empty_rcu; ) { \ + u->avl_right != peer_avl_empty_rcu;) { \ v = &u->avl_right; \ *stackptr++ = v; \ u = rcu_deref_locked(*v, base); \ @@ -504,10 +483,6 @@ relookup: p->daddr = *daddr; atomic_set(&p->refcnt, 1); atomic_set(&p->rid, 0); - atomic_set(&p->ip_id_count, - (daddr->family == AF_INET) ? - secure_ip_id(daddr->addr.a4) : - secure_ipv6_id(daddr->addr.a6)); p->metrics[RTAX_LOCK-1] = INETPEER_METRICS_NEW; p->rate_tokens = 0; /* 60*HZ is arbitrary, but chosen enough high so that the first @@ -529,7 +504,7 @@ EXPORT_SYMBOL_GPL(inet_getpeer); void inet_putpeer(struct inet_peer *p) { p->dtime = (__u32)jiffies; - smp_mb__before_atomic_dec(); + smp_mb__before_atomic(); atomic_dec(&p->refcnt); } EXPORT_SYMBOL_GPL(inet_putpeer); |