Commit eb733162 authored by Eric Dumazet's avatar Eric Dumazet Committed by Patrick McHardy
Browse files

netfilter: add __rcu annotations



Use helpers to reduce number of sparse warnings
(CONFIG_SPARSE_RCU_POINTER=y)
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
parent be9e9163
......@@ -20,6 +20,7 @@
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <linux/rculist_nulls.h>
struct ct_iter_state {
struct seq_net_private p;
......@@ -35,7 +36,8 @@ static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
for (st->bucket = 0;
st->bucket < net->ct.htable_size;
st->bucket++) {
n = rcu_dereference(net->ct.hash[st->bucket].first);
n = rcu_dereference(
hlist_nulls_first_rcu(&net->ct.hash[st->bucket]));
if (!is_a_nulls(n))
return n;
}
......@@ -48,13 +50,14 @@ static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
struct net *net = seq_file_net(seq);
struct ct_iter_state *st = seq->private;
head = rcu_dereference(head->next);
head = rcu_dereference(hlist_nulls_next_rcu(head));
while (is_a_nulls(head)) {
if (likely(get_nulls_value(head) == st->bucket)) {
if (++st->bucket >= net->ct.htable_size)
return NULL;
}
head = rcu_dereference(net->ct.hash[st->bucket].first);
head = rcu_dereference(
hlist_nulls_first_rcu(&net->ct.hash[st->bucket]));
}
return head;
}
......@@ -217,7 +220,8 @@ static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
struct hlist_node *n;
for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
n = rcu_dereference(net->ct.expect_hash[st->bucket].first);
n = rcu_dereference(
hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
if (n)
return n;
}
......@@ -230,11 +234,12 @@ static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
struct net *net = seq_file_net(seq);
struct ct_expect_iter_state *st = seq->private;
head = rcu_dereference(head->next);
head = rcu_dereference(hlist_next_rcu(head));
while (head == NULL) {
if (++st->bucket >= nf_ct_expect_hsize)
return NULL;
head = rcu_dereference(net->ct.expect_hash[st->bucket].first);
head = rcu_dereference(
hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
}
return head;
}
......
......@@ -502,7 +502,10 @@ int nf_nat_protocol_register(const struct nf_nat_protocol *proto)
int ret = 0;
spin_lock_bh(&nf_nat_lock);
if (nf_nat_protos[proto->protonum] != &nf_nat_unknown_protocol) {
if (rcu_dereference_protected(
nf_nat_protos[proto->protonum],
lockdep_is_held(&nf_nat_lock)
) != &nf_nat_unknown_protocol) {
ret = -EBUSY;
goto out;
}
......
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