{
struct nfattr *nest_helper;
const struct nf_conn_help *help = nfct_help(ct);
+ struct nf_conntrack_helper *helper;
- if (!help || !help->helper)
+ if (!help)
return 0;
+ rcu_read_lock();
+ helper = rcu_dereference(help->helper);
+ if (!helper)
+ goto out;
+
nest_helper = NFA_NEST(skb, CTA_HELP);
- NFA_PUT(skb, CTA_HELP_NAME, strlen(help->helper->name), help->helper->name);
+ NFA_PUT(skb, CTA_HELP_NAME, strlen(helper->name), helper->name);
- if (help->helper->to_nfattr)
- help->helper->to_nfattr(skb, ct);
+ if (helper->to_nfattr)
+ helper->to_nfattr(skb, ct);
NFA_NEST_END(skb, nest_helper);
-
+out:
+ rcu_read_unlock();
return 0;
nfattr_failure:
+ rcu_read_unlock();
return -1;
}
{
struct nf_conn *ct, *last;
struct nf_conntrack_tuple_hash *h;
- struct list_head *i;
+ struct hlist_node *n;
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
u_int8_t l3proto = nfmsg->nfgen_family;
last = (struct nf_conn *)cb->args[1];
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
restart:
- list_for_each_prev(i, &nf_conntrack_hash[cb->args[0]]) {
- h = (struct nf_conntrack_tuple_hash *) i;
+ hlist_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
+ hnode) {
if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
if (err < 0)
return err;
- h = nf_conntrack_find_get(&tuple, NULL);
+ h = nf_conntrack_find_get(&tuple);
if (!h)
return -ENOENT;
if (err < 0)
return err;
- h = nf_conntrack_find_get(&tuple, NULL);
+ h = nf_conntrack_find_get(&tuple);
if (!h)
return -ENOENT;
if (help && help->helper) {
/* we had a helper before ... */
nf_ct_remove_expectations(ct);
- help->helper = NULL;
+ rcu_assign_pointer(help->helper, NULL);
}
return 0;
}
- if (!help) {
- /* FIXME: we need to reallocate and rehash */
- return -EBUSY;
- }
-
helper = __nf_conntrack_helper_find_byname(helpname);
if (helper == NULL)
return -EINVAL;
- if (help->helper == helper)
- return 0;
-
- if (help->helper)
- /* we had a helper before ... */
- nf_ct_remove_expectations(ct);
+ if (help) {
+ if (help->helper == helper)
+ return 0;
+ if (help->helper)
+ return -EBUSY;
+ /* need to zero data of old helper */
+ memset(&help->help, 0, sizeof(help->help));
+ } else {
+ help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
+ if (help == NULL)
+ return -ENOMEM;
+ }
- /* need to zero data of old helper */
- memset(&help->help, 0, sizeof(help->help));
- help->helper = helper;
+ rcu_assign_pointer(help->helper, helper);
return 0;
}
struct nf_conn *ct;
int err = -EINVAL;
struct nf_conn_help *help;
+ struct nf_conntrack_helper *helper;
ct = nf_conntrack_alloc(otuple, rtuple);
if (ct == NULL || IS_ERR(ct))
ct->mark = ntohl(*(__be32 *)NFA_DATA(cda[CTA_MARK-1]));
#endif
- help = nfct_help(ct);
- if (help)
- help->helper = nf_ct_helper_find_get(rtuple);
+ helper = nf_ct_helper_find_get(rtuple);
+ if (helper) {
+ help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
+ if (help == NULL) {
+ nf_ct_helper_put(helper);
+ err = -ENOMEM;
+ goto err;
+ }
+ /* not in hash table yet so not strictly necessary */
+ rcu_assign_pointer(help->helper, helper);
+ }
add_timer(&ct->timeout);
nf_conntrack_hash_insert(ct);
- if (help && help->helper)
- nf_ct_helper_put(help->helper);
+ if (helper)
+ nf_ct_helper_put(helper);
return 0;
static inline int
ctnetlink_exp_dump_mask(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *mask)
+ const struct nf_conntrack_tuple_mask *mask)
{
int ret;
struct nf_conntrack_l3proto *l3proto;
struct nf_conntrack_l4proto *l4proto;
- struct nfattr *nest_parms = NFA_NEST(skb, CTA_EXPECT_MASK);
+ struct nf_conntrack_tuple m;
+ struct nfattr *nest_parms;
+
+ memset(&m, 0xFF, sizeof(m));
+ m.src.u.all = mask->src.u.all;
+ memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3));
+
+ nest_parms = NFA_NEST(skb, CTA_EXPECT_MASK);
l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
- ret = ctnetlink_dump_tuples_ip(skb, mask, l3proto);
+ ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto);
nf_ct_l3proto_put(l3proto);
if (unlikely(ret < 0))
goto nfattr_failure;
l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
- ret = ctnetlink_dump_tuples_proto(skb, mask, l4proto);
+ ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto);
nf_ct_l4proto_put(l4proto);
if (unlikely(ret < 0))
goto nfattr_failure;
return NOTIFY_DONE;
}
#endif
+static int ctnetlink_exp_done(struct netlink_callback *cb)
+{
+ if (cb->args[1])
+ nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]);
+ return 0;
+}
static int
ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
- struct nf_conntrack_expect *exp = NULL;
- struct list_head *i;
- u_int32_t *id = (u_int32_t *) &cb->args[0];
+ struct nf_conntrack_expect *exp, *last;
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
+ struct hlist_node *n;
u_int8_t l3proto = nfmsg->nfgen_family;
read_lock_bh(&nf_conntrack_lock);
- list_for_each_prev(i, &nf_conntrack_expect_list) {
- exp = (struct nf_conntrack_expect *) i;
- if (l3proto && exp->tuple.src.l3num != l3proto)
- continue;
- if (exp->id <= *id)
- continue;
- if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq,
- IPCTNL_MSG_EXP_NEW,
- 1, exp) < 0)
- goto out;
- *id = exp->id;
+ last = (struct nf_conntrack_expect *)cb->args[1];
+ for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
+restart:
+ hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]],
+ hnode) {
+ if (l3proto && exp->tuple.src.l3num != l3proto)
+ continue;
+ if (cb->args[1]) {
+ if (exp != last)
+ continue;
+ cb->args[1] = 0;
+ }
+ if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ IPCTNL_MSG_EXP_NEW,
+ 1, exp) < 0) {
+ atomic_inc(&exp->use);
+ cb->args[1] = (unsigned long)exp;
+ goto out;
+ }
+ }
+ if (cb->args[1]) {
+ cb->args[1] = 0;
+ goto restart;
+ }
}
out:
read_unlock_bh(&nf_conntrack_lock);
+ if (last)
+ nf_ct_expect_put(last);
return skb->len;
}
if (nlh->nlmsg_flags & NLM_F_DUMP) {
return netlink_dump_start(ctnl, skb, nlh,
ctnetlink_exp_dump_table,
- ctnetlink_done);
+ ctnetlink_exp_done);
}
if (cda[CTA_EXPECT_MASTER-1])
if (err < 0)
return err;
- exp = nf_conntrack_expect_find_get(&tuple);
+ exp = nf_ct_expect_find_get(&tuple);
if (!exp)
return -ENOENT;
if (cda[CTA_EXPECT_ID-1]) {
__be32 id = *(__be32 *)NFA_DATA(cda[CTA_EXPECT_ID-1]);
if (exp->id != ntohl(id)) {
- nf_conntrack_expect_put(exp);
+ nf_ct_expect_put(exp);
return -ENOENT;
}
}
if (err <= 0)
goto free;
- nf_conntrack_expect_put(exp);
+ nf_ct_expect_put(exp);
return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
free:
kfree_skb(skb2);
out:
- nf_conntrack_expect_put(exp);
+ nf_ct_expect_put(exp);
return err;
}
ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
struct nlmsghdr *nlh, struct nfattr *cda[])
{
- struct nf_conntrack_expect *exp, *tmp;
+ struct nf_conntrack_expect *exp;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_helper *h;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
+ struct hlist_node *n, *next;
u_int8_t u3 = nfmsg->nfgen_family;
+ unsigned int i;
int err;
if (nfattr_bad_size(cda, CTA_EXPECT_MAX, cta_min_exp))
return err;
/* bump usage count to 2 */
- exp = nf_conntrack_expect_find_get(&tuple);
+ exp = nf_ct_expect_find_get(&tuple);
if (!exp)
return -ENOENT;
if (cda[CTA_EXPECT_ID-1]) {
__be32 id = *(__be32 *)NFA_DATA(cda[CTA_EXPECT_ID-1]);
if (exp->id != ntohl(id)) {
- nf_conntrack_expect_put(exp);
+ nf_ct_expect_put(exp);
return -ENOENT;
}
}
/* after list removal, usage count == 1 */
- nf_conntrack_unexpect_related(exp);
+ nf_ct_unexpect_related(exp);
/* have to put what we 'get' above.
* after this line usage count == 0 */
- nf_conntrack_expect_put(exp);
+ nf_ct_expect_put(exp);
} else if (cda[CTA_EXPECT_HELP_NAME-1]) {
char *name = NFA_DATA(cda[CTA_EXPECT_HELP_NAME-1]);
+ struct nf_conn_help *m_help;
/* delete all expectations for this helper */
write_lock_bh(&nf_conntrack_lock);
write_unlock_bh(&nf_conntrack_lock);
return -EINVAL;
}
- list_for_each_entry_safe(exp, tmp, &nf_conntrack_expect_list,
- list) {
- struct nf_conn_help *m_help = nfct_help(exp->master);
- if (m_help->helper == h
- && del_timer(&exp->timeout)) {
- nf_ct_unlink_expect(exp);
- nf_conntrack_expect_put(exp);
+ for (i = 0; i < nf_ct_expect_hsize; i++) {
+ hlist_for_each_entry_safe(exp, n, next,
+ &nf_ct_expect_hash[i],
+ hnode) {
+ m_help = nfct_help(exp->master);
+ if (m_help->helper == h
+ && del_timer(&exp->timeout)) {
+ nf_ct_unlink_expect(exp);
+ nf_ct_expect_put(exp);
+ }
}
}
write_unlock_bh(&nf_conntrack_lock);
} else {
/* This basically means we have to flush everything*/
write_lock_bh(&nf_conntrack_lock);
- list_for_each_entry_safe(exp, tmp, &nf_conntrack_expect_list,
- list) {
- if (del_timer(&exp->timeout)) {
- nf_ct_unlink_expect(exp);
- nf_conntrack_expect_put(exp);
+ for (i = 0; i < nf_ct_expect_hsize; i++) {
+ hlist_for_each_entry_safe(exp, n, next,
+ &nf_ct_expect_hash[i],
+ hnode) {
+ if (del_timer(&exp->timeout)) {
+ nf_ct_unlink_expect(exp);
+ nf_ct_expect_put(exp);
+ }
}
}
write_unlock_bh(&nf_conntrack_lock);
return err;
/* Look for master conntrack of this expectation */
- h = nf_conntrack_find_get(&master_tuple, NULL);
+ h = nf_conntrack_find_get(&master_tuple);
if (!h)
return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h);
goto out;
}
- exp = nf_conntrack_expect_alloc(ct);
+ exp = nf_ct_expect_alloc(ct);
if (!exp) {
err = -ENOMEM;
goto out;
exp->master = ct;
exp->helper = NULL;
memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
- memcpy(&exp->mask, &mask, sizeof(struct nf_conntrack_tuple));
+ memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
+ exp->mask.src.u.all = mask.src.u.all;
- err = nf_conntrack_expect_related(exp);
- nf_conntrack_expect_put(exp);
+ err = nf_ct_expect_related(exp);
+ nf_ct_expect_put(exp);
out:
nf_ct_put(nf_ct_tuplehash_to_ctrack(h));
return err;
write_lock_bh(&nf_conntrack_lock);
- exp = __nf_conntrack_expect_find(&tuple);
+ exp = __nf_ct_expect_find(&tuple);
if (!exp) {
write_unlock_bh(&nf_conntrack_lock);
goto err_unreg_exp_subsys;
}
- ret = nf_conntrack_expect_register_notifier(&ctnl_notifier_exp);
+ ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp);
if (ret < 0) {
printk("ctnetlink_init: cannot expect register notifier.\n");
goto err_unreg_notifier;
printk("ctnetlink: unregistering from nfnetlink.\n");
#ifdef CONFIG_NF_CONNTRACK_EVENTS
- nf_conntrack_expect_unregister_notifier(&ctnl_notifier_exp);
+ nf_ct_expect_unregister_notifier(&ctnl_notifier_exp);
nf_conntrack_unregister_notifier(&ctnl_notifier);
#endif
projects / karo-tx-linux.git / blobdiff