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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Jakub Kicinski](/assets/img/avatar_default.png)
Cross-merge networking fixes after downstream PR. Conflicts: include/linux/mlx5/driver.h617f5db1a6
("RDMA/mlx5: Fix affinity assignment")dc13180824
("net/mlx5: Enable devlink port for embedded cpu VF vports") https://lore.kernel.org/all/20230613125939.595e50b8@canb.auug.org.au/ tools/testing/selftests/net/mptcp/mptcp_join.sh47867f0a7e
("selftests: mptcp: join: skip check if MIB counter not supported")425ba80312
("selftests: mptcp: join: support RM_ADDR for used endpoints or not")45b1a1227a
("mptcp: introduces more address related mibs")0639fa230a
("selftests: mptcp: add explicit check for new mibs") https://lore.kernel.org/netdev/20230609-upstream-net-20230610-mptcp-selftests-support-old-kernels-part-3-v1-0-2896fe2ee8a3@tessares.net/ No adjacent changes. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
684 lines
17 KiB
C
684 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/netfilter.h>
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#include <linux/rhashtable.h>
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#include <linux/netdevice.h>
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#include <net/ip.h>
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#include <net/ip6_route.h>
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#include <net/netfilter/nf_tables.h>
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#include <net/netfilter/nf_flow_table.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_core.h>
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#include <net/netfilter/nf_conntrack_l4proto.h>
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#include <net/netfilter/nf_conntrack_tuple.h>
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static DEFINE_MUTEX(flowtable_lock);
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static LIST_HEAD(flowtables);
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static void
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flow_offload_fill_dir(struct flow_offload *flow,
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enum flow_offload_tuple_dir dir)
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{
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struct flow_offload_tuple *ft = &flow->tuplehash[dir].tuple;
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struct nf_conntrack_tuple *ctt = &flow->ct->tuplehash[dir].tuple;
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ft->dir = dir;
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switch (ctt->src.l3num) {
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case NFPROTO_IPV4:
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ft->src_v4 = ctt->src.u3.in;
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ft->dst_v4 = ctt->dst.u3.in;
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break;
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case NFPROTO_IPV6:
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ft->src_v6 = ctt->src.u3.in6;
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ft->dst_v6 = ctt->dst.u3.in6;
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break;
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}
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ft->l3proto = ctt->src.l3num;
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ft->l4proto = ctt->dst.protonum;
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switch (ctt->dst.protonum) {
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case IPPROTO_TCP:
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case IPPROTO_UDP:
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ft->src_port = ctt->src.u.tcp.port;
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ft->dst_port = ctt->dst.u.tcp.port;
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break;
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}
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}
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struct flow_offload *flow_offload_alloc(struct nf_conn *ct)
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{
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struct flow_offload *flow;
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if (unlikely(nf_ct_is_dying(ct)))
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return NULL;
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flow = kzalloc(sizeof(*flow), GFP_ATOMIC);
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if (!flow)
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return NULL;
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refcount_inc(&ct->ct_general.use);
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flow->ct = ct;
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flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_ORIGINAL);
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flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_REPLY);
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if (ct->status & IPS_SRC_NAT)
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__set_bit(NF_FLOW_SNAT, &flow->flags);
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if (ct->status & IPS_DST_NAT)
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__set_bit(NF_FLOW_DNAT, &flow->flags);
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return flow;
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}
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EXPORT_SYMBOL_GPL(flow_offload_alloc);
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static u32 flow_offload_dst_cookie(struct flow_offload_tuple *flow_tuple)
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{
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const struct rt6_info *rt;
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if (flow_tuple->l3proto == NFPROTO_IPV6) {
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rt = (const struct rt6_info *)flow_tuple->dst_cache;
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return rt6_get_cookie(rt);
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}
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return 0;
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}
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static int flow_offload_fill_route(struct flow_offload *flow,
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const struct nf_flow_route *route,
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enum flow_offload_tuple_dir dir)
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{
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struct flow_offload_tuple *flow_tuple = &flow->tuplehash[dir].tuple;
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struct dst_entry *dst = route->tuple[dir].dst;
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int i, j = 0;
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switch (flow_tuple->l3proto) {
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case NFPROTO_IPV4:
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flow_tuple->mtu = ip_dst_mtu_maybe_forward(dst, true);
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break;
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case NFPROTO_IPV6:
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flow_tuple->mtu = ip6_dst_mtu_maybe_forward(dst, true);
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break;
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}
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flow_tuple->iifidx = route->tuple[dir].in.ifindex;
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for (i = route->tuple[dir].in.num_encaps - 1; i >= 0; i--) {
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flow_tuple->encap[j].id = route->tuple[dir].in.encap[i].id;
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flow_tuple->encap[j].proto = route->tuple[dir].in.encap[i].proto;
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if (route->tuple[dir].in.ingress_vlans & BIT(i))
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flow_tuple->in_vlan_ingress |= BIT(j);
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j++;
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}
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flow_tuple->encap_num = route->tuple[dir].in.num_encaps;
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switch (route->tuple[dir].xmit_type) {
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case FLOW_OFFLOAD_XMIT_DIRECT:
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memcpy(flow_tuple->out.h_dest, route->tuple[dir].out.h_dest,
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ETH_ALEN);
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memcpy(flow_tuple->out.h_source, route->tuple[dir].out.h_source,
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ETH_ALEN);
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flow_tuple->out.ifidx = route->tuple[dir].out.ifindex;
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flow_tuple->out.hw_ifidx = route->tuple[dir].out.hw_ifindex;
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break;
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case FLOW_OFFLOAD_XMIT_XFRM:
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case FLOW_OFFLOAD_XMIT_NEIGH:
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flow_tuple->dst_cache = dst;
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flow_tuple->dst_cookie = flow_offload_dst_cookie(flow_tuple);
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break;
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default:
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WARN_ON_ONCE(1);
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break;
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}
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flow_tuple->xmit_type = route->tuple[dir].xmit_type;
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return 0;
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}
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static void nft_flow_dst_release(struct flow_offload *flow,
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enum flow_offload_tuple_dir dir)
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{
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if (flow->tuplehash[dir].tuple.xmit_type == FLOW_OFFLOAD_XMIT_NEIGH ||
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flow->tuplehash[dir].tuple.xmit_type == FLOW_OFFLOAD_XMIT_XFRM)
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dst_release(flow->tuplehash[dir].tuple.dst_cache);
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}
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void flow_offload_route_init(struct flow_offload *flow,
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const struct nf_flow_route *route)
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{
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flow_offload_fill_route(flow, route, FLOW_OFFLOAD_DIR_ORIGINAL);
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flow_offload_fill_route(flow, route, FLOW_OFFLOAD_DIR_REPLY);
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flow->type = NF_FLOW_OFFLOAD_ROUTE;
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}
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EXPORT_SYMBOL_GPL(flow_offload_route_init);
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static void flow_offload_fixup_tcp(struct ip_ct_tcp *tcp)
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{
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tcp->seen[0].td_maxwin = 0;
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tcp->seen[1].td_maxwin = 0;
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}
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static void flow_offload_fixup_ct(struct nf_conn *ct)
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{
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struct net *net = nf_ct_net(ct);
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int l4num = nf_ct_protonum(ct);
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s32 timeout;
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if (l4num == IPPROTO_TCP) {
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struct nf_tcp_net *tn = nf_tcp_pernet(net);
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flow_offload_fixup_tcp(&ct->proto.tcp);
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timeout = tn->timeouts[ct->proto.tcp.state];
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timeout -= tn->offload_timeout;
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} else if (l4num == IPPROTO_UDP) {
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struct nf_udp_net *tn = nf_udp_pernet(net);
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enum udp_conntrack state =
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test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
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UDP_CT_REPLIED : UDP_CT_UNREPLIED;
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timeout = tn->timeouts[state];
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timeout -= tn->offload_timeout;
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} else {
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return;
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}
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if (timeout < 0)
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timeout = 0;
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if (nf_flow_timeout_delta(READ_ONCE(ct->timeout)) > (__s32)timeout)
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WRITE_ONCE(ct->timeout, nfct_time_stamp + timeout);
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}
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static void flow_offload_route_release(struct flow_offload *flow)
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{
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nft_flow_dst_release(flow, FLOW_OFFLOAD_DIR_ORIGINAL);
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nft_flow_dst_release(flow, FLOW_OFFLOAD_DIR_REPLY);
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}
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void flow_offload_free(struct flow_offload *flow)
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{
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switch (flow->type) {
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case NF_FLOW_OFFLOAD_ROUTE:
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flow_offload_route_release(flow);
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break;
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default:
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break;
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}
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nf_ct_put(flow->ct);
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kfree_rcu(flow, rcu_head);
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}
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EXPORT_SYMBOL_GPL(flow_offload_free);
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static u32 flow_offload_hash(const void *data, u32 len, u32 seed)
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{
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const struct flow_offload_tuple *tuple = data;
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return jhash(tuple, offsetof(struct flow_offload_tuple, __hash), seed);
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}
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static u32 flow_offload_hash_obj(const void *data, u32 len, u32 seed)
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{
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const struct flow_offload_tuple_rhash *tuplehash = data;
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return jhash(&tuplehash->tuple, offsetof(struct flow_offload_tuple, __hash), seed);
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}
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static int flow_offload_hash_cmp(struct rhashtable_compare_arg *arg,
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const void *ptr)
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{
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const struct flow_offload_tuple *tuple = arg->key;
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const struct flow_offload_tuple_rhash *x = ptr;
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if (memcmp(&x->tuple, tuple, offsetof(struct flow_offload_tuple, __hash)))
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return 1;
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return 0;
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}
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static const struct rhashtable_params nf_flow_offload_rhash_params = {
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.head_offset = offsetof(struct flow_offload_tuple_rhash, node),
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.hashfn = flow_offload_hash,
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.obj_hashfn = flow_offload_hash_obj,
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.obj_cmpfn = flow_offload_hash_cmp,
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.automatic_shrinking = true,
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};
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unsigned long flow_offload_get_timeout(struct flow_offload *flow)
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{
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unsigned long timeout = NF_FLOW_TIMEOUT;
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struct net *net = nf_ct_net(flow->ct);
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int l4num = nf_ct_protonum(flow->ct);
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if (l4num == IPPROTO_TCP) {
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struct nf_tcp_net *tn = nf_tcp_pernet(net);
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timeout = tn->offload_timeout;
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} else if (l4num == IPPROTO_UDP) {
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struct nf_udp_net *tn = nf_udp_pernet(net);
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timeout = tn->offload_timeout;
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}
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return timeout;
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}
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int flow_offload_add(struct nf_flowtable *flow_table, struct flow_offload *flow)
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{
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int err;
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flow->timeout = nf_flowtable_time_stamp + flow_offload_get_timeout(flow);
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err = rhashtable_insert_fast(&flow_table->rhashtable,
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&flow->tuplehash[0].node,
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nf_flow_offload_rhash_params);
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if (err < 0)
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return err;
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err = rhashtable_insert_fast(&flow_table->rhashtable,
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&flow->tuplehash[1].node,
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nf_flow_offload_rhash_params);
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if (err < 0) {
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rhashtable_remove_fast(&flow_table->rhashtable,
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&flow->tuplehash[0].node,
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nf_flow_offload_rhash_params);
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return err;
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}
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nf_ct_offload_timeout(flow->ct);
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if (nf_flowtable_hw_offload(flow_table)) {
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__set_bit(NF_FLOW_HW, &flow->flags);
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nf_flow_offload_add(flow_table, flow);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(flow_offload_add);
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void flow_offload_refresh(struct nf_flowtable *flow_table,
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struct flow_offload *flow, bool force)
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{
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u32 timeout;
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timeout = nf_flowtable_time_stamp + flow_offload_get_timeout(flow);
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if (force || timeout - READ_ONCE(flow->timeout) > HZ)
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WRITE_ONCE(flow->timeout, timeout);
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else
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return;
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if (likely(!nf_flowtable_hw_offload(flow_table)))
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return;
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nf_flow_offload_add(flow_table, flow);
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}
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EXPORT_SYMBOL_GPL(flow_offload_refresh);
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static bool nf_flow_is_outdated(const struct flow_offload *flow)
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{
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return test_bit(IPS_SEEN_REPLY_BIT, &flow->ct->status) &&
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!test_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags);
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}
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static inline bool nf_flow_has_expired(const struct flow_offload *flow)
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{
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return nf_flow_timeout_delta(flow->timeout) <= 0;
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}
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static void flow_offload_del(struct nf_flowtable *flow_table,
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struct flow_offload *flow)
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{
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rhashtable_remove_fast(&flow_table->rhashtable,
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&flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].node,
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nf_flow_offload_rhash_params);
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rhashtable_remove_fast(&flow_table->rhashtable,
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&flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].node,
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nf_flow_offload_rhash_params);
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flow_offload_free(flow);
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}
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void flow_offload_teardown(struct flow_offload *flow)
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{
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clear_bit(IPS_OFFLOAD_BIT, &flow->ct->status);
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set_bit(NF_FLOW_TEARDOWN, &flow->flags);
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flow_offload_fixup_ct(flow->ct);
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}
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EXPORT_SYMBOL_GPL(flow_offload_teardown);
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struct flow_offload_tuple_rhash *
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flow_offload_lookup(struct nf_flowtable *flow_table,
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struct flow_offload_tuple *tuple)
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{
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struct flow_offload_tuple_rhash *tuplehash;
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struct flow_offload *flow;
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int dir;
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tuplehash = rhashtable_lookup(&flow_table->rhashtable, tuple,
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nf_flow_offload_rhash_params);
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if (!tuplehash)
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return NULL;
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dir = tuplehash->tuple.dir;
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flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
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if (test_bit(NF_FLOW_TEARDOWN, &flow->flags))
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return NULL;
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if (unlikely(nf_ct_is_dying(flow->ct)))
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return NULL;
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return tuplehash;
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}
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EXPORT_SYMBOL_GPL(flow_offload_lookup);
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static int
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nf_flow_table_iterate(struct nf_flowtable *flow_table,
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void (*iter)(struct nf_flowtable *flowtable,
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struct flow_offload *flow, void *data),
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void *data)
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{
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struct flow_offload_tuple_rhash *tuplehash;
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struct rhashtable_iter hti;
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struct flow_offload *flow;
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int err = 0;
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rhashtable_walk_enter(&flow_table->rhashtable, &hti);
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rhashtable_walk_start(&hti);
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while ((tuplehash = rhashtable_walk_next(&hti))) {
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if (IS_ERR(tuplehash)) {
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if (PTR_ERR(tuplehash) != -EAGAIN) {
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err = PTR_ERR(tuplehash);
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break;
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}
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continue;
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}
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if (tuplehash->tuple.dir)
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continue;
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flow = container_of(tuplehash, struct flow_offload, tuplehash[0]);
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iter(flow_table, flow, data);
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}
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rhashtable_walk_stop(&hti);
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rhashtable_walk_exit(&hti);
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return err;
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}
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static void nf_flow_offload_gc_step(struct nf_flowtable *flow_table,
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struct flow_offload *flow, void *data)
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{
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if (nf_flow_has_expired(flow) ||
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nf_ct_is_dying(flow->ct) ||
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nf_flow_is_outdated(flow))
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flow_offload_teardown(flow);
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if (test_bit(NF_FLOW_TEARDOWN, &flow->flags)) {
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if (test_bit(NF_FLOW_HW, &flow->flags)) {
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if (!test_bit(NF_FLOW_HW_DYING, &flow->flags))
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nf_flow_offload_del(flow_table, flow);
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else if (test_bit(NF_FLOW_HW_DEAD, &flow->flags))
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flow_offload_del(flow_table, flow);
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} else {
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flow_offload_del(flow_table, flow);
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}
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} else if (test_bit(NF_FLOW_HW, &flow->flags)) {
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nf_flow_offload_stats(flow_table, flow);
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}
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}
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void nf_flow_table_gc_run(struct nf_flowtable *flow_table)
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{
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nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
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}
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static void nf_flow_offload_work_gc(struct work_struct *work)
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{
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struct nf_flowtable *flow_table;
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flow_table = container_of(work, struct nf_flowtable, gc_work.work);
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nf_flow_table_gc_run(flow_table);
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queue_delayed_work(system_power_efficient_wq, &flow_table->gc_work, HZ);
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}
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static void nf_flow_nat_port_tcp(struct sk_buff *skb, unsigned int thoff,
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__be16 port, __be16 new_port)
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{
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struct tcphdr *tcph;
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tcph = (void *)(skb_network_header(skb) + thoff);
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inet_proto_csum_replace2(&tcph->check, skb, port, new_port, false);
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}
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static void nf_flow_nat_port_udp(struct sk_buff *skb, unsigned int thoff,
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__be16 port, __be16 new_port)
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{
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struct udphdr *udph;
|
|
|
|
udph = (void *)(skb_network_header(skb) + thoff);
|
|
if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
inet_proto_csum_replace2(&udph->check, skb, port,
|
|
new_port, false);
|
|
if (!udph->check)
|
|
udph->check = CSUM_MANGLED_0;
|
|
}
|
|
}
|
|
|
|
static void nf_flow_nat_port(struct sk_buff *skb, unsigned int thoff,
|
|
u8 protocol, __be16 port, __be16 new_port)
|
|
{
|
|
switch (protocol) {
|
|
case IPPROTO_TCP:
|
|
nf_flow_nat_port_tcp(skb, thoff, port, new_port);
|
|
break;
|
|
case IPPROTO_UDP:
|
|
nf_flow_nat_port_udp(skb, thoff, port, new_port);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void nf_flow_snat_port(const struct flow_offload *flow,
|
|
struct sk_buff *skb, unsigned int thoff,
|
|
u8 protocol, enum flow_offload_tuple_dir dir)
|
|
{
|
|
struct flow_ports *hdr;
|
|
__be16 port, new_port;
|
|
|
|
hdr = (void *)(skb_network_header(skb) + thoff);
|
|
|
|
switch (dir) {
|
|
case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
port = hdr->source;
|
|
new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_port;
|
|
hdr->source = new_port;
|
|
break;
|
|
case FLOW_OFFLOAD_DIR_REPLY:
|
|
port = hdr->dest;
|
|
new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_port;
|
|
hdr->dest = new_port;
|
|
break;
|
|
}
|
|
|
|
nf_flow_nat_port(skb, thoff, protocol, port, new_port);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_flow_snat_port);
|
|
|
|
void nf_flow_dnat_port(const struct flow_offload *flow, struct sk_buff *skb,
|
|
unsigned int thoff, u8 protocol,
|
|
enum flow_offload_tuple_dir dir)
|
|
{
|
|
struct flow_ports *hdr;
|
|
__be16 port, new_port;
|
|
|
|
hdr = (void *)(skb_network_header(skb) + thoff);
|
|
|
|
switch (dir) {
|
|
case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
port = hdr->dest;
|
|
new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_port;
|
|
hdr->dest = new_port;
|
|
break;
|
|
case FLOW_OFFLOAD_DIR_REPLY:
|
|
port = hdr->source;
|
|
new_port = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_port;
|
|
hdr->source = new_port;
|
|
break;
|
|
}
|
|
|
|
nf_flow_nat_port(skb, thoff, protocol, port, new_port);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_flow_dnat_port);
|
|
|
|
int nf_flow_table_init(struct nf_flowtable *flowtable)
|
|
{
|
|
int err;
|
|
|
|
INIT_DELAYED_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
|
|
flow_block_init(&flowtable->flow_block);
|
|
init_rwsem(&flowtable->flow_block_lock);
|
|
|
|
err = rhashtable_init(&flowtable->rhashtable,
|
|
&nf_flow_offload_rhash_params);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
queue_delayed_work(system_power_efficient_wq,
|
|
&flowtable->gc_work, HZ);
|
|
|
|
mutex_lock(&flowtable_lock);
|
|
list_add(&flowtable->list, &flowtables);
|
|
mutex_unlock(&flowtable_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_flow_table_init);
|
|
|
|
static void nf_flow_table_do_cleanup(struct nf_flowtable *flow_table,
|
|
struct flow_offload *flow, void *data)
|
|
{
|
|
struct net_device *dev = data;
|
|
|
|
if (!dev) {
|
|
flow_offload_teardown(flow);
|
|
return;
|
|
}
|
|
|
|
if (net_eq(nf_ct_net(flow->ct), dev_net(dev)) &&
|
|
(flow->tuplehash[0].tuple.iifidx == dev->ifindex ||
|
|
flow->tuplehash[1].tuple.iifidx == dev->ifindex))
|
|
flow_offload_teardown(flow);
|
|
}
|
|
|
|
void nf_flow_table_gc_cleanup(struct nf_flowtable *flowtable,
|
|
struct net_device *dev)
|
|
{
|
|
nf_flow_table_iterate(flowtable, nf_flow_table_do_cleanup, dev);
|
|
flush_delayed_work(&flowtable->gc_work);
|
|
nf_flow_table_offload_flush(flowtable);
|
|
}
|
|
|
|
void nf_flow_table_cleanup(struct net_device *dev)
|
|
{
|
|
struct nf_flowtable *flowtable;
|
|
|
|
mutex_lock(&flowtable_lock);
|
|
list_for_each_entry(flowtable, &flowtables, list)
|
|
nf_flow_table_gc_cleanup(flowtable, dev);
|
|
mutex_unlock(&flowtable_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_flow_table_cleanup);
|
|
|
|
void nf_flow_table_free(struct nf_flowtable *flow_table)
|
|
{
|
|
mutex_lock(&flowtable_lock);
|
|
list_del(&flow_table->list);
|
|
mutex_unlock(&flowtable_lock);
|
|
|
|
cancel_delayed_work_sync(&flow_table->gc_work);
|
|
nf_flow_table_offload_flush(flow_table);
|
|
/* ... no more pending work after this stage ... */
|
|
nf_flow_table_iterate(flow_table, nf_flow_table_do_cleanup, NULL);
|
|
nf_flow_table_gc_run(flow_table);
|
|
nf_flow_table_offload_flush_cleanup(flow_table);
|
|
rhashtable_destroy(&flow_table->rhashtable);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_flow_table_free);
|
|
|
|
static int nf_flow_table_init_net(struct net *net)
|
|
{
|
|
net->ft.stat = alloc_percpu(struct nf_flow_table_stat);
|
|
return net->ft.stat ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void nf_flow_table_fini_net(struct net *net)
|
|
{
|
|
free_percpu(net->ft.stat);
|
|
}
|
|
|
|
static int nf_flow_table_pernet_init(struct net *net)
|
|
{
|
|
int ret;
|
|
|
|
ret = nf_flow_table_init_net(net);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = nf_flow_table_init_proc(net);
|
|
if (ret < 0)
|
|
goto out_proc;
|
|
|
|
return 0;
|
|
|
|
out_proc:
|
|
nf_flow_table_fini_net(net);
|
|
return ret;
|
|
}
|
|
|
|
static void nf_flow_table_pernet_exit(struct list_head *net_exit_list)
|
|
{
|
|
struct net *net;
|
|
|
|
list_for_each_entry(net, net_exit_list, exit_list) {
|
|
nf_flow_table_fini_proc(net);
|
|
nf_flow_table_fini_net(net);
|
|
}
|
|
}
|
|
|
|
static struct pernet_operations nf_flow_table_net_ops = {
|
|
.init = nf_flow_table_pernet_init,
|
|
.exit_batch = nf_flow_table_pernet_exit,
|
|
};
|
|
|
|
static int __init nf_flow_table_module_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_pernet_subsys(&nf_flow_table_net_ops);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = nf_flow_table_offload_init();
|
|
if (ret)
|
|
goto out_offload;
|
|
|
|
return 0;
|
|
|
|
out_offload:
|
|
unregister_pernet_subsys(&nf_flow_table_net_ops);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit nf_flow_table_module_exit(void)
|
|
{
|
|
nf_flow_table_offload_exit();
|
|
unregister_pernet_subsys(&nf_flow_table_net_ops);
|
|
}
|
|
|
|
module_init(nf_flow_table_module_init);
|
|
module_exit(nf_flow_table_module_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
|
|
MODULE_DESCRIPTION("Netfilter flow table module");
|