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4963ed48f2
Conflicts: net/ipv4/arp.c The net/ipv4/arp.c conflict was one commit adding a new local variable while another commit was deleting one. Signed-off-by: David S. Miller <davem@davemloft.net>
758 lines
18 KiB
C
758 lines
18 KiB
C
/*
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* Copyright (c) 2015 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/openvswitch.h>
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#include <net/ip.h>
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#include <net/netfilter/nf_conntrack_core.h>
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#include <net/netfilter/nf_conntrack_helper.h>
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#include <net/netfilter/nf_conntrack_labels.h>
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#include <net/netfilter/nf_conntrack_zones.h>
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#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
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#include "datapath.h"
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#include "conntrack.h"
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#include "flow.h"
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#include "flow_netlink.h"
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struct ovs_ct_len_tbl {
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size_t maxlen;
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size_t minlen;
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};
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/* Metadata mark for masked write to conntrack mark */
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struct md_mark {
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u32 value;
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u32 mask;
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};
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/* Metadata label for masked write to conntrack label. */
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struct md_label {
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struct ovs_key_ct_label value;
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struct ovs_key_ct_label mask;
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};
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/* Conntrack action context for execution. */
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struct ovs_conntrack_info {
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struct nf_conntrack_helper *helper;
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struct nf_conntrack_zone zone;
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struct nf_conn *ct;
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u32 flags;
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u16 family;
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struct md_mark mark;
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struct md_label label;
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};
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static u16 key_to_nfproto(const struct sw_flow_key *key)
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{
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switch (ntohs(key->eth.type)) {
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case ETH_P_IP:
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return NFPROTO_IPV4;
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case ETH_P_IPV6:
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return NFPROTO_IPV6;
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default:
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return NFPROTO_UNSPEC;
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}
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}
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/* Map SKB connection state into the values used by flow definition. */
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static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo)
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{
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u8 ct_state = OVS_CS_F_TRACKED;
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switch (ctinfo) {
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case IP_CT_ESTABLISHED_REPLY:
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case IP_CT_RELATED_REPLY:
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case IP_CT_NEW_REPLY:
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ct_state |= OVS_CS_F_REPLY_DIR;
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break;
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default:
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break;
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}
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switch (ctinfo) {
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case IP_CT_ESTABLISHED:
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case IP_CT_ESTABLISHED_REPLY:
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ct_state |= OVS_CS_F_ESTABLISHED;
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break;
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case IP_CT_RELATED:
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case IP_CT_RELATED_REPLY:
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ct_state |= OVS_CS_F_RELATED;
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break;
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case IP_CT_NEW:
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case IP_CT_NEW_REPLY:
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ct_state |= OVS_CS_F_NEW;
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break;
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default:
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break;
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}
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return ct_state;
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}
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static u32 ovs_ct_get_mark(const struct nf_conn *ct)
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{
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#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
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return ct ? ct->mark : 0;
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#else
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return 0;
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#endif
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}
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static void ovs_ct_get_label(const struct nf_conn *ct,
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struct ovs_key_ct_label *label)
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{
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struct nf_conn_labels *cl = ct ? nf_ct_labels_find(ct) : NULL;
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if (cl) {
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size_t len = cl->words * sizeof(long);
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if (len > OVS_CT_LABEL_LEN)
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len = OVS_CT_LABEL_LEN;
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else if (len < OVS_CT_LABEL_LEN)
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memset(label, 0, OVS_CT_LABEL_LEN);
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memcpy(label, cl->bits, len);
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} else {
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memset(label, 0, OVS_CT_LABEL_LEN);
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}
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}
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static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state,
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const struct nf_conntrack_zone *zone,
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const struct nf_conn *ct)
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{
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key->ct.state = state;
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key->ct.zone = zone->id;
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key->ct.mark = ovs_ct_get_mark(ct);
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ovs_ct_get_label(ct, &key->ct.label);
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}
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/* Update 'key' based on skb->nfct. If 'post_ct' is true, then OVS has
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* previously sent the packet to conntrack via the ct action.
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*/
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static void ovs_ct_update_key(const struct sk_buff *skb,
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struct sw_flow_key *key, bool post_ct)
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{
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const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt;
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enum ip_conntrack_info ctinfo;
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struct nf_conn *ct;
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u8 state = 0;
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ct = nf_ct_get(skb, &ctinfo);
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if (ct) {
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state = ovs_ct_get_state(ctinfo);
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if (ct->master)
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state |= OVS_CS_F_RELATED;
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zone = nf_ct_zone(ct);
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} else if (post_ct) {
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state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID;
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}
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__ovs_ct_update_key(key, state, zone, ct);
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}
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void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key)
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{
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ovs_ct_update_key(skb, key, false);
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}
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int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb)
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{
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if (nla_put_u8(skb, OVS_KEY_ATTR_CT_STATE, key->ct.state))
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return -EMSGSIZE;
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if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
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nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, key->ct.zone))
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return -EMSGSIZE;
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if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
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nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, key->ct.mark))
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return -EMSGSIZE;
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if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
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nla_put(skb, OVS_KEY_ATTR_CT_LABEL, sizeof(key->ct.label),
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&key->ct.label))
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return -EMSGSIZE;
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return 0;
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}
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static int ovs_ct_set_mark(struct sk_buff *skb, struct sw_flow_key *key,
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u32 ct_mark, u32 mask)
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{
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#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
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enum ip_conntrack_info ctinfo;
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struct nf_conn *ct;
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u32 new_mark;
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/* The connection could be invalid, in which case set_mark is no-op. */
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct)
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return 0;
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new_mark = ct_mark | (ct->mark & ~(mask));
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if (ct->mark != new_mark) {
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ct->mark = new_mark;
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nf_conntrack_event_cache(IPCT_MARK, ct);
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key->ct.mark = new_mark;
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}
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return 0;
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#else
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return -ENOTSUPP;
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#endif
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}
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static int ovs_ct_set_label(struct sk_buff *skb, struct sw_flow_key *key,
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const struct ovs_key_ct_label *label,
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const struct ovs_key_ct_label *mask)
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{
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enum ip_conntrack_info ctinfo;
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struct nf_conn_labels *cl;
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struct nf_conn *ct;
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int err;
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if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS))
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return -ENOTSUPP;
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/* The connection could be invalid, in which case set_label is no-op.*/
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct)
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return 0;
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cl = nf_ct_labels_find(ct);
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if (!cl) {
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nf_ct_labels_ext_add(ct);
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cl = nf_ct_labels_find(ct);
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}
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if (!cl || cl->words * sizeof(long) < OVS_CT_LABEL_LEN)
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return -ENOSPC;
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err = nf_connlabels_replace(ct, (u32 *)label, (u32 *)mask,
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OVS_CT_LABEL_LEN / sizeof(u32));
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if (err)
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return err;
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ovs_ct_get_label(ct, &key->ct.label);
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return 0;
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}
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/* 'skb' should already be pulled to nh_ofs. */
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static int ovs_ct_helper(struct sk_buff *skb, u16 proto)
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{
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const struct nf_conntrack_helper *helper;
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const struct nf_conn_help *help;
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enum ip_conntrack_info ctinfo;
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unsigned int protoff;
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struct nf_conn *ct;
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct || ctinfo == IP_CT_RELATED_REPLY)
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return NF_ACCEPT;
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help = nfct_help(ct);
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if (!help)
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return NF_ACCEPT;
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helper = rcu_dereference(help->helper);
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if (!helper)
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return NF_ACCEPT;
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switch (proto) {
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case NFPROTO_IPV4:
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protoff = ip_hdrlen(skb);
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break;
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case NFPROTO_IPV6: {
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u8 nexthdr = ipv6_hdr(skb)->nexthdr;
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__be16 frag_off;
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int ofs;
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ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr,
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&frag_off);
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if (ofs < 0 || (frag_off & htons(~0x7)) != 0) {
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pr_debug("proto header not found\n");
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return NF_ACCEPT;
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}
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protoff = ofs;
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break;
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}
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default:
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WARN_ONCE(1, "helper invoked on non-IP family!");
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return NF_DROP;
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}
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return helper->help(skb, protoff, ct, ctinfo);
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}
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static int handle_fragments(struct net *net, struct sw_flow_key *key,
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u16 zone, struct sk_buff *skb)
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{
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struct ovs_skb_cb ovs_cb = *OVS_CB(skb);
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if (key->eth.type == htons(ETH_P_IP)) {
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enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone;
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int err;
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memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
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err = ip_defrag(skb, user);
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if (err)
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return err;
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ovs_cb.mru = IPCB(skb)->frag_max_size;
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} else if (key->eth.type == htons(ETH_P_IPV6)) {
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#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
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enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone;
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struct sk_buff *reasm;
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memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
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reasm = nf_ct_frag6_gather(skb, user);
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if (!reasm)
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return -EINPROGRESS;
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if (skb == reasm)
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return -EINVAL;
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key->ip.proto = ipv6_hdr(reasm)->nexthdr;
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skb_morph(skb, reasm);
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consume_skb(reasm);
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ovs_cb.mru = IP6CB(skb)->frag_max_size;
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#else
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return -EPFNOSUPPORT;
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#endif
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} else {
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return -EPFNOSUPPORT;
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}
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key->ip.frag = OVS_FRAG_TYPE_NONE;
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skb_clear_hash(skb);
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skb->ignore_df = 1;
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*OVS_CB(skb) = ovs_cb;
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return 0;
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}
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static struct nf_conntrack_expect *
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ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone,
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u16 proto, const struct sk_buff *skb)
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{
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struct nf_conntrack_tuple tuple;
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if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, net, &tuple))
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return NULL;
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return __nf_ct_expect_find(net, zone, &tuple);
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}
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/* Determine whether skb->nfct is equal to the result of conntrack lookup. */
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static bool skb_nfct_cached(const struct net *net, const struct sk_buff *skb,
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const struct ovs_conntrack_info *info)
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{
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enum ip_conntrack_info ctinfo;
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struct nf_conn *ct;
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct)
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return false;
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if (!net_eq(net, read_pnet(&ct->ct_net)))
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return false;
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if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct)))
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return false;
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if (info->helper) {
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struct nf_conn_help *help;
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help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
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if (help && rcu_access_pointer(help->helper) != info->helper)
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return false;
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}
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return true;
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}
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static int __ovs_ct_lookup(struct net *net, const struct sw_flow_key *key,
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const struct ovs_conntrack_info *info,
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struct sk_buff *skb)
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{
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/* If we are recirculating packets to match on conntrack fields and
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* committing with a separate conntrack action, then we don't need to
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* actually run the packet through conntrack twice unless it's for a
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* different zone.
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*/
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if (!skb_nfct_cached(net, skb, info)) {
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struct nf_conn *tmpl = info->ct;
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/* Associate skb with specified zone. */
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if (tmpl) {
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if (skb->nfct)
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nf_conntrack_put(skb->nfct);
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nf_conntrack_get(&tmpl->ct_general);
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skb->nfct = &tmpl->ct_general;
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skb->nfctinfo = IP_CT_NEW;
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}
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if (nf_conntrack_in(net, info->family, NF_INET_PRE_ROUTING,
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skb) != NF_ACCEPT)
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return -ENOENT;
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if (ovs_ct_helper(skb, info->family) != NF_ACCEPT) {
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WARN_ONCE(1, "helper rejected packet");
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return -EINVAL;
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}
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}
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return 0;
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}
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/* Lookup connection and read fields into key. */
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static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
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const struct ovs_conntrack_info *info,
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struct sk_buff *skb)
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{
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struct nf_conntrack_expect *exp;
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exp = ovs_ct_expect_find(net, &info->zone, info->family, skb);
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if (exp) {
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u8 state;
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state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED;
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__ovs_ct_update_key(key, state, &info->zone, exp->master);
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} else {
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int err;
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err = __ovs_ct_lookup(net, key, info, skb);
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if (err)
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return err;
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ovs_ct_update_key(skb, key, true);
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}
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return 0;
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}
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/* Lookup connection and confirm if unconfirmed. */
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static int ovs_ct_commit(struct net *net, struct sw_flow_key *key,
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const struct ovs_conntrack_info *info,
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struct sk_buff *skb)
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{
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u8 state;
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int err;
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state = key->ct.state;
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if (key->ct.zone == info->zone.id &&
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((state & OVS_CS_F_TRACKED) && !(state & OVS_CS_F_NEW))) {
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/* Previous lookup has shown that this connection is already
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* tracked and committed. Skip committing.
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*/
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return 0;
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}
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err = __ovs_ct_lookup(net, key, info, skb);
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if (err)
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return err;
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if (nf_conntrack_confirm(skb) != NF_ACCEPT)
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return -EINVAL;
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ovs_ct_update_key(skb, key, true);
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return 0;
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}
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static bool label_nonzero(const struct ovs_key_ct_label *label)
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{
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size_t i;
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for (i = 0; i < sizeof(*label); i++)
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if (label->ct_label[i])
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return true;
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return false;
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}
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int ovs_ct_execute(struct net *net, struct sk_buff *skb,
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struct sw_flow_key *key,
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const struct ovs_conntrack_info *info)
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{
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int nh_ofs;
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int err;
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/* The conntrack module expects to be working at L3. */
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nh_ofs = skb_network_offset(skb);
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skb_pull(skb, nh_ofs);
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if (key->ip.frag != OVS_FRAG_TYPE_NONE) {
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err = handle_fragments(net, key, info->zone.id, skb);
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if (err)
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return err;
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}
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if (info->flags & OVS_CT_F_COMMIT)
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err = ovs_ct_commit(net, key, info, skb);
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else
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err = ovs_ct_lookup(net, key, info, skb);
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if (err)
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goto err;
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if (info->mark.mask) {
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err = ovs_ct_set_mark(skb, key, info->mark.value,
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info->mark.mask);
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if (err)
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goto err;
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}
|
|
if (label_nonzero(&info->label.mask))
|
|
err = ovs_ct_set_label(skb, key, &info->label.value,
|
|
&info->label.mask);
|
|
err:
|
|
skb_push(skb, nh_ofs);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name,
|
|
const struct sw_flow_key *key, bool log)
|
|
{
|
|
struct nf_conntrack_helper *helper;
|
|
struct nf_conn_help *help;
|
|
|
|
helper = nf_conntrack_helper_try_module_get(name, info->family,
|
|
key->ip.proto);
|
|
if (!helper) {
|
|
OVS_NLERR(log, "Unknown helper \"%s\"", name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
help = nf_ct_helper_ext_add(info->ct, helper, GFP_KERNEL);
|
|
if (!help) {
|
|
module_put(helper->me);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rcu_assign_pointer(help->helper, helper);
|
|
info->helper = helper;
|
|
return 0;
|
|
}
|
|
|
|
static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = {
|
|
[OVS_CT_ATTR_FLAGS] = { .minlen = sizeof(u32),
|
|
.maxlen = sizeof(u32) },
|
|
[OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16),
|
|
.maxlen = sizeof(u16) },
|
|
[OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark),
|
|
.maxlen = sizeof(struct md_mark) },
|
|
[OVS_CT_ATTR_LABEL] = { .minlen = sizeof(struct md_label),
|
|
.maxlen = sizeof(struct md_label) },
|
|
[OVS_CT_ATTR_HELPER] = { .minlen = 1,
|
|
.maxlen = NF_CT_HELPER_NAME_LEN }
|
|
};
|
|
|
|
static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info,
|
|
const char **helper, bool log)
|
|
{
|
|
struct nlattr *a;
|
|
int rem;
|
|
|
|
nla_for_each_nested(a, attr, rem) {
|
|
int type = nla_type(a);
|
|
int maxlen = ovs_ct_attr_lens[type].maxlen;
|
|
int minlen = ovs_ct_attr_lens[type].minlen;
|
|
|
|
if (type > OVS_CT_ATTR_MAX) {
|
|
OVS_NLERR(log,
|
|
"Unknown conntrack attr (type=%d, max=%d)",
|
|
type, OVS_CT_ATTR_MAX);
|
|
return -EINVAL;
|
|
}
|
|
if (nla_len(a) < minlen || nla_len(a) > maxlen) {
|
|
OVS_NLERR(log,
|
|
"Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)",
|
|
type, nla_len(a), maxlen);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (type) {
|
|
case OVS_CT_ATTR_FLAGS:
|
|
info->flags = nla_get_u32(a);
|
|
break;
|
|
#ifdef CONFIG_NF_CONNTRACK_ZONES
|
|
case OVS_CT_ATTR_ZONE:
|
|
info->zone.id = nla_get_u16(a);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_NF_CONNTRACK_MARK
|
|
case OVS_CT_ATTR_MARK: {
|
|
struct md_mark *mark = nla_data(a);
|
|
|
|
info->mark = *mark;
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_NF_CONNTRACK_LABELS
|
|
case OVS_CT_ATTR_LABEL: {
|
|
struct md_label *label = nla_data(a);
|
|
|
|
info->label = *label;
|
|
break;
|
|
}
|
|
#endif
|
|
case OVS_CT_ATTR_HELPER:
|
|
*helper = nla_data(a);
|
|
if (!memchr(*helper, '\0', nla_len(a))) {
|
|
OVS_NLERR(log, "Invalid conntrack helper");
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
OVS_NLERR(log, "Unknown conntrack attr (%d)",
|
|
type);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (rem > 0) {
|
|
OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr)
|
|
{
|
|
if (attr == OVS_KEY_ATTR_CT_STATE)
|
|
return true;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
|
|
attr == OVS_KEY_ATTR_CT_ZONE)
|
|
return true;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
|
|
attr == OVS_KEY_ATTR_CT_MARK)
|
|
return true;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
|
|
attr == OVS_KEY_ATTR_CT_LABEL) {
|
|
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
|
|
|
|
return ovs_net->xt_label;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int ovs_ct_copy_action(struct net *net, const struct nlattr *attr,
|
|
const struct sw_flow_key *key,
|
|
struct sw_flow_actions **sfa, bool log)
|
|
{
|
|
struct ovs_conntrack_info ct_info;
|
|
const char *helper = NULL;
|
|
u16 family;
|
|
int err;
|
|
|
|
family = key_to_nfproto(key);
|
|
if (family == NFPROTO_UNSPEC) {
|
|
OVS_NLERR(log, "ct family unspecified");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&ct_info, 0, sizeof(ct_info));
|
|
ct_info.family = family;
|
|
|
|
nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID,
|
|
NF_CT_DEFAULT_ZONE_DIR, 0);
|
|
|
|
err = parse_ct(attr, &ct_info, &helper, log);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Set up template for tracking connections in specific zones. */
|
|
ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL);
|
|
if (!ct_info.ct) {
|
|
OVS_NLERR(log, "Failed to allocate conntrack template");
|
|
return -ENOMEM;
|
|
}
|
|
if (helper) {
|
|
err = ovs_ct_add_helper(&ct_info, helper, key, log);
|
|
if (err)
|
|
goto err_free_ct;
|
|
}
|
|
|
|
err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info,
|
|
sizeof(ct_info), log);
|
|
if (err)
|
|
goto err_free_ct;
|
|
|
|
__set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status);
|
|
nf_conntrack_get(&ct_info.ct->ct_general);
|
|
return 0;
|
|
err_free_ct:
|
|
nf_conntrack_free(ct_info.ct);
|
|
return err;
|
|
}
|
|
|
|
int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct nlattr *start;
|
|
|
|
start = nla_nest_start(skb, OVS_ACTION_ATTR_CT);
|
|
if (!start)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_u32(skb, OVS_CT_ATTR_FLAGS, ct_info->flags))
|
|
return -EMSGSIZE;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
|
|
nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id))
|
|
return -EMSGSIZE;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
|
|
nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark),
|
|
&ct_info->mark))
|
|
return -EMSGSIZE;
|
|
if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
|
|
nla_put(skb, OVS_CT_ATTR_LABEL, sizeof(ct_info->label),
|
|
&ct_info->label))
|
|
return -EMSGSIZE;
|
|
if (ct_info->helper) {
|
|
if (nla_put_string(skb, OVS_CT_ATTR_HELPER,
|
|
ct_info->helper->name))
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
nla_nest_end(skb, start);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ovs_ct_free_action(const struct nlattr *a)
|
|
{
|
|
struct ovs_conntrack_info *ct_info = nla_data(a);
|
|
|
|
if (ct_info->helper)
|
|
module_put(ct_info->helper->me);
|
|
if (ct_info->ct)
|
|
nf_ct_put(ct_info->ct);
|
|
}
|
|
|
|
void ovs_ct_init(struct net *net)
|
|
{
|
|
unsigned int n_bits = sizeof(struct ovs_key_ct_label) * BITS_PER_BYTE;
|
|
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
|
|
|
|
if (nf_connlabels_get(net, n_bits)) {
|
|
ovs_net->xt_label = false;
|
|
OVS_NLERR(true, "Failed to set connlabel length");
|
|
} else {
|
|
ovs_net->xt_label = true;
|
|
}
|
|
}
|
|
|
|
void ovs_ct_exit(struct net *net)
|
|
{
|
|
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
|
|
|
|
if (ovs_net->xt_label)
|
|
nf_connlabels_put(net);
|
|
}
|