diff options
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
-rw-r--r-- | net/netfilter/nf_conntrack_core.c | 46 |
1 files changed, 16 insertions, 30 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 496c4920505b..c00858344f02 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -514,7 +514,6 @@ EXPORT_SYMBOL_GPL(nf_ct_get_id); static void clean_from_lists(struct nf_conn *ct) { - pr_debug("clean_from_lists(%p)\n", ct); hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode); hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnnode); @@ -582,7 +581,6 @@ void nf_ct_destroy(struct nf_conntrack *nfct) { struct nf_conn *ct = (struct nf_conn *)nfct; - pr_debug("%s(%p)\n", __func__, ct); WARN_ON(refcount_read(&nfct->use) != 0); if (unlikely(nf_ct_is_template(ct))) { @@ -603,7 +601,6 @@ void nf_ct_destroy(struct nf_conntrack *nfct) if (ct->master) nf_ct_put(ct->master); - pr_debug("%s: returning ct=%p to slab\n", __func__, ct); nf_conntrack_free(ct); } EXPORT_SYMBOL(nf_ct_destroy); @@ -786,8 +783,6 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone, struct nf_conntrack_tuple_hash *h; struct nf_conn *ct; - rcu_read_lock(); - h = ____nf_conntrack_find(net, zone, tuple, hash); if (h) { /* We have a candidate that matches the tuple we're interested @@ -799,7 +794,7 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone, smp_acquire__after_ctrl_dep(); if (likely(nf_ct_key_equal(h, tuple, zone, net))) - goto found; + return h; /* TYPESAFE_BY_RCU recycled the candidate */ nf_ct_put(ct); @@ -807,8 +802,6 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone, h = NULL; } -found: - rcu_read_unlock(); return h; } @@ -820,16 +813,21 @@ nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone, unsigned int rid, zone_id = nf_ct_zone_id(zone, IP_CT_DIR_ORIGINAL); struct nf_conntrack_tuple_hash *thash; + rcu_read_lock(); + thash = __nf_conntrack_find_get(net, zone, tuple, hash_conntrack_raw(tuple, zone_id, net)); if (thash) - return thash; + goto out_unlock; rid = nf_ct_zone_id(zone, IP_CT_DIR_REPLY); if (rid != zone_id) - return __nf_conntrack_find_get(net, zone, tuple, - hash_conntrack_raw(tuple, rid, net)); + thash = __nf_conntrack_find_get(net, zone, tuple, + hash_conntrack_raw(tuple, rid, net)); + +out_unlock: + rcu_read_unlock(); return thash; } EXPORT_SYMBOL_GPL(nf_conntrack_find_get); @@ -1210,7 +1208,6 @@ __nf_conntrack_confirm(struct sk_buff *skb) goto dying; } - pr_debug("Confirming conntrack %p\n", ct); /* We have to check the DYING flag after unlink to prevent * a race against nf_ct_get_next_corpse() possibly called from * user context, else we insert an already 'dead' hash, blocking @@ -1721,10 +1718,8 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, struct nf_conntrack_zone tmp; struct nf_conntrack_net *cnet; - if (!nf_ct_invert_tuple(&repl_tuple, tuple)) { - pr_debug("Can't invert tuple.\n"); + if (!nf_ct_invert_tuple(&repl_tuple, tuple)) return NULL; - } zone = nf_ct_zone_tmpl(tmpl, skb, &tmp); ct = __nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC, @@ -1764,8 +1759,6 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, spin_lock_bh(&nf_conntrack_expect_lock); exp = nf_ct_find_expectation(net, zone, tuple); if (exp) { - pr_debug("expectation arrives ct=%p exp=%p\n", - ct, exp); /* Welcome, Mr. Bond. We've been expecting you... */ __set_bit(IPS_EXPECTED_BIT, &ct->status); /* exp->master safe, refcnt bumped in nf_ct_find_expectation */ @@ -1829,10 +1822,8 @@ resolve_normal_ct(struct nf_conn *tmpl, if (!nf_ct_get_tuple(skb, skb_network_offset(skb), dataoff, state->pf, protonum, state->net, - &tuple)) { - pr_debug("Can't get tuple\n"); + &tuple)) return 0; - } /* look for tuple match */ zone = nf_ct_zone_tmpl(tmpl, skb, &tmp); @@ -1864,17 +1855,15 @@ resolve_normal_ct(struct nf_conn *tmpl, if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) { ctinfo = IP_CT_ESTABLISHED_REPLY; } else { + unsigned long status = READ_ONCE(ct->status); + /* Once we've had two way comms, always ESTABLISHED. */ - if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) { - pr_debug("normal packet for %p\n", ct); + if (likely(status & IPS_SEEN_REPLY)) ctinfo = IP_CT_ESTABLISHED; - } else if (test_bit(IPS_EXPECTED_BIT, &ct->status)) { - pr_debug("related packet for %p\n", ct); + else if (status & IPS_EXPECTED) ctinfo = IP_CT_RELATED; - } else { - pr_debug("new packet for %p\n", ct); + else ctinfo = IP_CT_NEW; - } } nf_ct_set(skb, ct, ctinfo); return 0; @@ -1988,7 +1977,6 @@ nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state) /* rcu_read_lock()ed by nf_hook_thresh */ dataoff = get_l4proto(skb, skb_network_offset(skb), state->pf, &protonum); if (dataoff <= 0) { - pr_debug("not prepared to track yet or error occurred\n"); NF_CT_STAT_INC_ATOMIC(state->net, invalid); ret = NF_ACCEPT; goto out; @@ -2027,7 +2015,6 @@ repeat: if (ret <= 0) { /* Invalid: inverse of the return code tells * the netfilter core what to do */ - pr_debug("nf_conntrack_in: Can't track with proto module\n"); nf_ct_put(ct); skb->_nfct = 0; /* Special case: TCP tracker reports an attempt to reopen a @@ -2066,7 +2053,6 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, /* Should be unconfirmed, so not in hash table yet */ WARN_ON(nf_ct_is_confirmed(ct)); - pr_debug("Altering reply tuple of %p to ", ct); nf_ct_dump_tuple(newreply); ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply; |