15b497af4SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 27f8a436eSJoe Stringer /* 37f8a436eSJoe Stringer * Copyright (c) 2015 Nicira, Inc. 47f8a436eSJoe Stringer */ 57f8a436eSJoe Stringer 67f8a436eSJoe Stringer #include <linux/module.h> 77f8a436eSJoe Stringer #include <linux/openvswitch.h> 805752523SJarno Rajahalme #include <linux/tcp.h> 905752523SJarno Rajahalme #include <linux/udp.h> 1005752523SJarno Rajahalme #include <linux/sctp.h> 1111efd5cbSYi-Hung Wei #include <linux/static_key.h> 127f8a436eSJoe Stringer #include <net/ip.h> 1311efd5cbSYi-Hung Wei #include <net/genetlink.h> 147f8a436eSJoe Stringer #include <net/netfilter/nf_conntrack_core.h> 1511efd5cbSYi-Hung Wei #include <net/netfilter/nf_conntrack_count.h> 16cae3a262SJoe Stringer #include <net/netfilter/nf_conntrack_helper.h> 17c2ac6673SJoe Stringer #include <net/netfilter/nf_conntrack_labels.h> 1805752523SJarno Rajahalme #include <net/netfilter/nf_conntrack_seqadj.h> 1906bd2bdfSYi-Hung Wei #include <net/netfilter/nf_conntrack_timeout.h> 207f8a436eSJoe Stringer #include <net/netfilter/nf_conntrack_zones.h> 217f8a436eSJoe Stringer #include <net/netfilter/ipv6/nf_defrag_ipv6.h> 2270b095c8SFlorian Westphal #include <net/ipv6_frag.h> 237f8a436eSJoe Stringer 244806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 25d2c5c103SFlorian Westphal #include <net/netfilter/nf_nat.h> 2605752523SJarno Rajahalme #endif 2705752523SJarno Rajahalme 287f8a436eSJoe Stringer #include "datapath.h" 297f8a436eSJoe Stringer #include "conntrack.h" 307f8a436eSJoe Stringer #include "flow.h" 317f8a436eSJoe Stringer #include "flow_netlink.h" 327f8a436eSJoe Stringer 337f8a436eSJoe Stringer struct ovs_ct_len_tbl { 3405752523SJarno Rajahalme int maxlen; 3505752523SJarno Rajahalme int minlen; 367f8a436eSJoe Stringer }; 377f8a436eSJoe Stringer 38182e3042SJoe Stringer /* Metadata mark for masked write to conntrack mark */ 39182e3042SJoe Stringer struct md_mark { 40182e3042SJoe Stringer u32 value; 41182e3042SJoe Stringer u32 mask; 42182e3042SJoe Stringer }; 43182e3042SJoe Stringer 44c2ac6673SJoe Stringer /* Metadata label for masked write to conntrack label. */ 4533db4125SJoe Stringer struct md_labels { 4633db4125SJoe Stringer struct ovs_key_ct_labels value; 4733db4125SJoe Stringer struct ovs_key_ct_labels mask; 48c2ac6673SJoe Stringer }; 49c2ac6673SJoe Stringer 5005752523SJarno Rajahalme enum ovs_ct_nat { 5105752523SJarno Rajahalme OVS_CT_NAT = 1 << 0, /* NAT for committed connections only. */ 5205752523SJarno Rajahalme OVS_CT_SRC_NAT = 1 << 1, /* Source NAT for NEW connections. */ 5305752523SJarno Rajahalme OVS_CT_DST_NAT = 1 << 2, /* Destination NAT for NEW connections. */ 5405752523SJarno Rajahalme }; 5505752523SJarno Rajahalme 567f8a436eSJoe Stringer /* Conntrack action context for execution. */ 577f8a436eSJoe Stringer struct ovs_conntrack_info { 58cae3a262SJoe Stringer struct nf_conntrack_helper *helper; 597f8a436eSJoe Stringer struct nf_conntrack_zone zone; 607f8a436eSJoe Stringer struct nf_conn *ct; 61ab38a7b5SJoe Stringer u8 commit : 1; 6205752523SJarno Rajahalme u8 nat : 3; /* enum ovs_ct_nat */ 63dd41d33fSJarno Rajahalme u8 force : 1; 6412064551SJarno Rajahalme u8 have_eventmask : 1; 657f8a436eSJoe Stringer u16 family; 6612064551SJarno Rajahalme u32 eventmask; /* Mask of 1 << IPCT_*. */ 67182e3042SJoe Stringer struct md_mark mark; 6833db4125SJoe Stringer struct md_labels labels; 6906bd2bdfSYi-Hung Wei char timeout[CTNL_TIMEOUT_NAME_MAX]; 7071778951SYi-Hung Wei struct nf_ct_timeout *nf_ct_timeout; 714806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 722eb0f624SThierry Du Tre struct nf_nat_range2 range; /* Only present for SRC NAT and DST NAT. */ 7305752523SJarno Rajahalme #endif 747f8a436eSJoe Stringer }; 757f8a436eSJoe Stringer 7611efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 7711efd5cbSYi-Hung Wei #define OVS_CT_LIMIT_UNLIMITED 0 7811efd5cbSYi-Hung Wei #define OVS_CT_LIMIT_DEFAULT OVS_CT_LIMIT_UNLIMITED 7911efd5cbSYi-Hung Wei #define CT_LIMIT_HASH_BUCKETS 512 8011efd5cbSYi-Hung Wei static DEFINE_STATIC_KEY_FALSE(ovs_ct_limit_enabled); 8111efd5cbSYi-Hung Wei 8211efd5cbSYi-Hung Wei struct ovs_ct_limit { 8311efd5cbSYi-Hung Wei /* Elements in ovs_ct_limit_info->limits hash table */ 8411efd5cbSYi-Hung Wei struct hlist_node hlist_node; 8511efd5cbSYi-Hung Wei struct rcu_head rcu; 8611efd5cbSYi-Hung Wei u16 zone; 8711efd5cbSYi-Hung Wei u32 limit; 8811efd5cbSYi-Hung Wei }; 8911efd5cbSYi-Hung Wei 9011efd5cbSYi-Hung Wei struct ovs_ct_limit_info { 9111efd5cbSYi-Hung Wei u32 default_limit; 9211efd5cbSYi-Hung Wei struct hlist_head *limits; 9311efd5cbSYi-Hung Wei struct nf_conncount_data *data; 9411efd5cbSYi-Hung Wei }; 9511efd5cbSYi-Hung Wei 9611efd5cbSYi-Hung Wei static const struct nla_policy ct_limit_policy[OVS_CT_LIMIT_ATTR_MAX + 1] = { 9711efd5cbSYi-Hung Wei [OVS_CT_LIMIT_ATTR_ZONE_LIMIT] = { .type = NLA_NESTED, }, 9811efd5cbSYi-Hung Wei }; 9911efd5cbSYi-Hung Wei #endif 10011efd5cbSYi-Hung Wei 10109aa98adSJarno Rajahalme static bool labels_nonzero(const struct ovs_key_ct_labels *labels); 10209aa98adSJarno Rajahalme 1032f3ab9f9SJoe Stringer static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info); 1042f3ab9f9SJoe Stringer 1057f8a436eSJoe Stringer static u16 key_to_nfproto(const struct sw_flow_key *key) 1067f8a436eSJoe Stringer { 1077f8a436eSJoe Stringer switch (ntohs(key->eth.type)) { 1087f8a436eSJoe Stringer case ETH_P_IP: 1097f8a436eSJoe Stringer return NFPROTO_IPV4; 1107f8a436eSJoe Stringer case ETH_P_IPV6: 1117f8a436eSJoe Stringer return NFPROTO_IPV6; 1127f8a436eSJoe Stringer default: 1137f8a436eSJoe Stringer return NFPROTO_UNSPEC; 1147f8a436eSJoe Stringer } 1157f8a436eSJoe Stringer } 1167f8a436eSJoe Stringer 1177f8a436eSJoe Stringer /* Map SKB connection state into the values used by flow definition. */ 1187f8a436eSJoe Stringer static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo) 1197f8a436eSJoe Stringer { 1207f8a436eSJoe Stringer u8 ct_state = OVS_CS_F_TRACKED; 1217f8a436eSJoe Stringer 1227f8a436eSJoe Stringer switch (ctinfo) { 1237f8a436eSJoe Stringer case IP_CT_ESTABLISHED_REPLY: 1247f8a436eSJoe Stringer case IP_CT_RELATED_REPLY: 1257f8a436eSJoe Stringer ct_state |= OVS_CS_F_REPLY_DIR; 1267f8a436eSJoe Stringer break; 1277f8a436eSJoe Stringer default: 1287f8a436eSJoe Stringer break; 1297f8a436eSJoe Stringer } 1307f8a436eSJoe Stringer 1317f8a436eSJoe Stringer switch (ctinfo) { 1327f8a436eSJoe Stringer case IP_CT_ESTABLISHED: 1337f8a436eSJoe Stringer case IP_CT_ESTABLISHED_REPLY: 1347f8a436eSJoe Stringer ct_state |= OVS_CS_F_ESTABLISHED; 1357f8a436eSJoe Stringer break; 1367f8a436eSJoe Stringer case IP_CT_RELATED: 1377f8a436eSJoe Stringer case IP_CT_RELATED_REPLY: 1387f8a436eSJoe Stringer ct_state |= OVS_CS_F_RELATED; 1397f8a436eSJoe Stringer break; 1407f8a436eSJoe Stringer case IP_CT_NEW: 1417f8a436eSJoe Stringer ct_state |= OVS_CS_F_NEW; 1427f8a436eSJoe Stringer break; 1437f8a436eSJoe Stringer default: 1447f8a436eSJoe Stringer break; 1457f8a436eSJoe Stringer } 1467f8a436eSJoe Stringer 1477f8a436eSJoe Stringer return ct_state; 1487f8a436eSJoe Stringer } 1497f8a436eSJoe Stringer 1500d5cdef8SJoe Stringer static u32 ovs_ct_get_mark(const struct nf_conn *ct) 1510d5cdef8SJoe Stringer { 1520d5cdef8SJoe Stringer #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 1530d5cdef8SJoe Stringer return ct ? ct->mark : 0; 1540d5cdef8SJoe Stringer #else 1550d5cdef8SJoe Stringer return 0; 1560d5cdef8SJoe Stringer #endif 1570d5cdef8SJoe Stringer } 1580d5cdef8SJoe Stringer 159b87cec38SJarno Rajahalme /* Guard against conntrack labels max size shrinking below 128 bits. */ 160b87cec38SJarno Rajahalme #if NF_CT_LABELS_MAX_SIZE < 16 161b87cec38SJarno Rajahalme #error NF_CT_LABELS_MAX_SIZE must be at least 16 bytes 162b87cec38SJarno Rajahalme #endif 163b87cec38SJarno Rajahalme 16433db4125SJoe Stringer static void ovs_ct_get_labels(const struct nf_conn *ct, 16533db4125SJoe Stringer struct ovs_key_ct_labels *labels) 166c2ac6673SJoe Stringer { 167c2ac6673SJoe Stringer struct nf_conn_labels *cl = ct ? nf_ct_labels_find(ct) : NULL; 168c2ac6673SJoe Stringer 169b87cec38SJarno Rajahalme if (cl) 170b87cec38SJarno Rajahalme memcpy(labels, cl->bits, OVS_CT_LABELS_LEN); 171b87cec38SJarno Rajahalme else 17233db4125SJoe Stringer memset(labels, 0, OVS_CT_LABELS_LEN); 173c2ac6673SJoe Stringer } 174c2ac6673SJoe Stringer 1759dd7f890SJarno Rajahalme static void __ovs_ct_update_key_orig_tp(struct sw_flow_key *key, 1769dd7f890SJarno Rajahalme const struct nf_conntrack_tuple *orig, 1779dd7f890SJarno Rajahalme u8 icmp_proto) 1789dd7f890SJarno Rajahalme { 179316d4d78SJarno Rajahalme key->ct_orig_proto = orig->dst.protonum; 1809dd7f890SJarno Rajahalme if (orig->dst.protonum == icmp_proto) { 1819dd7f890SJarno Rajahalme key->ct.orig_tp.src = htons(orig->dst.u.icmp.type); 1829dd7f890SJarno Rajahalme key->ct.orig_tp.dst = htons(orig->dst.u.icmp.code); 1839dd7f890SJarno Rajahalme } else { 1849dd7f890SJarno Rajahalme key->ct.orig_tp.src = orig->src.u.all; 1859dd7f890SJarno Rajahalme key->ct.orig_tp.dst = orig->dst.u.all; 1869dd7f890SJarno Rajahalme } 1879dd7f890SJarno Rajahalme } 1889dd7f890SJarno Rajahalme 1897f8a436eSJoe Stringer static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state, 190182e3042SJoe Stringer const struct nf_conntrack_zone *zone, 191182e3042SJoe Stringer const struct nf_conn *ct) 1927f8a436eSJoe Stringer { 193316d4d78SJarno Rajahalme key->ct_state = state; 194316d4d78SJarno Rajahalme key->ct_zone = zone->id; 1950d5cdef8SJoe Stringer key->ct.mark = ovs_ct_get_mark(ct); 19633db4125SJoe Stringer ovs_ct_get_labels(ct, &key->ct.labels); 1979dd7f890SJarno Rajahalme 1989dd7f890SJarno Rajahalme if (ct) { 1999dd7f890SJarno Rajahalme const struct nf_conntrack_tuple *orig; 2009dd7f890SJarno Rajahalme 2019dd7f890SJarno Rajahalme /* Use the master if we have one. */ 2029dd7f890SJarno Rajahalme if (ct->master) 2039dd7f890SJarno Rajahalme ct = ct->master; 2049dd7f890SJarno Rajahalme orig = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; 2059dd7f890SJarno Rajahalme 2069dd7f890SJarno Rajahalme /* IP version must match with the master connection. */ 2079dd7f890SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP) && 2089dd7f890SJarno Rajahalme nf_ct_l3num(ct) == NFPROTO_IPV4) { 2099dd7f890SJarno Rajahalme key->ipv4.ct_orig.src = orig->src.u3.ip; 2109dd7f890SJarno Rajahalme key->ipv4.ct_orig.dst = orig->dst.u3.ip; 2119dd7f890SJarno Rajahalme __ovs_ct_update_key_orig_tp(key, orig, IPPROTO_ICMP); 2129dd7f890SJarno Rajahalme return; 2139dd7f890SJarno Rajahalme } else if (key->eth.type == htons(ETH_P_IPV6) && 2149dd7f890SJarno Rajahalme !sw_flow_key_is_nd(key) && 2159dd7f890SJarno Rajahalme nf_ct_l3num(ct) == NFPROTO_IPV6) { 2169dd7f890SJarno Rajahalme key->ipv6.ct_orig.src = orig->src.u3.in6; 2179dd7f890SJarno Rajahalme key->ipv6.ct_orig.dst = orig->dst.u3.in6; 2189dd7f890SJarno Rajahalme __ovs_ct_update_key_orig_tp(key, orig, NEXTHDR_ICMP); 2199dd7f890SJarno Rajahalme return; 2209dd7f890SJarno Rajahalme } 2219dd7f890SJarno Rajahalme } 222316d4d78SJarno Rajahalme /* Clear 'ct_orig_proto' to mark the non-existence of conntrack 2239dd7f890SJarno Rajahalme * original direction key fields. 2249dd7f890SJarno Rajahalme */ 225316d4d78SJarno Rajahalme key->ct_orig_proto = 0; 2267f8a436eSJoe Stringer } 2277f8a436eSJoe Stringer 2285e17da63SJarno Rajahalme /* Update 'key' based on skb->_nfct. If 'post_ct' is true, then OVS has 22905752523SJarno Rajahalme * previously sent the packet to conntrack via the ct action. If 23005752523SJarno Rajahalme * 'keep_nat_flags' is true, the existing NAT flags retained, else they are 23105752523SJarno Rajahalme * initialized from the connection status. 2327f8a436eSJoe Stringer */ 2337f8a436eSJoe Stringer static void ovs_ct_update_key(const struct sk_buff *skb, 234d110986cSJoe Stringer const struct ovs_conntrack_info *info, 23505752523SJarno Rajahalme struct sw_flow_key *key, bool post_ct, 23605752523SJarno Rajahalme bool keep_nat_flags) 2377f8a436eSJoe Stringer { 2387f8a436eSJoe Stringer const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt; 2397f8a436eSJoe Stringer enum ip_conntrack_info ctinfo; 2407f8a436eSJoe Stringer struct nf_conn *ct; 2417f8a436eSJoe Stringer u8 state = 0; 2427f8a436eSJoe Stringer 2437f8a436eSJoe Stringer ct = nf_ct_get(skb, &ctinfo); 2447f8a436eSJoe Stringer if (ct) { 2457f8a436eSJoe Stringer state = ovs_ct_get_state(ctinfo); 2469f13ded8SJarno Rajahalme /* All unconfirmed entries are NEW connections. */ 2474f0909eeSJoe Stringer if (!nf_ct_is_confirmed(ct)) 2484f0909eeSJoe Stringer state |= OVS_CS_F_NEW; 2499f13ded8SJarno Rajahalme /* OVS persists the related flag for the duration of the 2509f13ded8SJarno Rajahalme * connection. 2519f13ded8SJarno Rajahalme */ 2527f8a436eSJoe Stringer if (ct->master) 2537f8a436eSJoe Stringer state |= OVS_CS_F_RELATED; 25405752523SJarno Rajahalme if (keep_nat_flags) { 255316d4d78SJarno Rajahalme state |= key->ct_state & OVS_CS_F_NAT_MASK; 25605752523SJarno Rajahalme } else { 25705752523SJarno Rajahalme if (ct->status & IPS_SRC_NAT) 25805752523SJarno Rajahalme state |= OVS_CS_F_SRC_NAT; 25905752523SJarno Rajahalme if (ct->status & IPS_DST_NAT) 26005752523SJarno Rajahalme state |= OVS_CS_F_DST_NAT; 26105752523SJarno Rajahalme } 2627f8a436eSJoe Stringer zone = nf_ct_zone(ct); 2637f8a436eSJoe Stringer } else if (post_ct) { 2647f8a436eSJoe Stringer state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID; 265d110986cSJoe Stringer if (info) 266d110986cSJoe Stringer zone = &info->zone; 2677f8a436eSJoe Stringer } 268182e3042SJoe Stringer __ovs_ct_update_key(key, state, zone, ct); 2697f8a436eSJoe Stringer } 2707f8a436eSJoe Stringer 2719f13ded8SJarno Rajahalme /* This is called to initialize CT key fields possibly coming in from the local 2729f13ded8SJarno Rajahalme * stack. 2739f13ded8SJarno Rajahalme */ 274d29334c1Swenxu void ovs_ct_fill_key(const struct sk_buff *skb, 275d29334c1Swenxu struct sw_flow_key *key, 276d29334c1Swenxu bool post_ct) 2777f8a436eSJoe Stringer { 278d29334c1Swenxu ovs_ct_update_key(skb, NULL, key, post_ct, false); 2797f8a436eSJoe Stringer } 2807f8a436eSJoe Stringer 2819dd7f890SJarno Rajahalme int ovs_ct_put_key(const struct sw_flow_key *swkey, 2829dd7f890SJarno Rajahalme const struct sw_flow_key *output, struct sk_buff *skb) 2837f8a436eSJoe Stringer { 284316d4d78SJarno Rajahalme if (nla_put_u32(skb, OVS_KEY_ATTR_CT_STATE, output->ct_state)) 2857f8a436eSJoe Stringer return -EMSGSIZE; 2867f8a436eSJoe Stringer 2877f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 288316d4d78SJarno Rajahalme nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, output->ct_zone)) 2897f8a436eSJoe Stringer return -EMSGSIZE; 2907f8a436eSJoe Stringer 291182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2929dd7f890SJarno Rajahalme nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, output->ct.mark)) 293182e3042SJoe Stringer return -EMSGSIZE; 294182e3042SJoe Stringer 2959723e6abSValentin Rothberg if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2969dd7f890SJarno Rajahalme nla_put(skb, OVS_KEY_ATTR_CT_LABELS, sizeof(output->ct.labels), 2979dd7f890SJarno Rajahalme &output->ct.labels)) 298c2ac6673SJoe Stringer return -EMSGSIZE; 299c2ac6673SJoe Stringer 300316d4d78SJarno Rajahalme if (swkey->ct_orig_proto) { 3019dd7f890SJarno Rajahalme if (swkey->eth.type == htons(ETH_P_IP)) { 3029aba6c5bSPeilin Ye struct ovs_key_ct_tuple_ipv4 orig; 3039aba6c5bSPeilin Ye 3049aba6c5bSPeilin Ye memset(&orig, 0, sizeof(orig)); 3059aba6c5bSPeilin Ye orig.ipv4_src = output->ipv4.ct_orig.src; 3069aba6c5bSPeilin Ye orig.ipv4_dst = output->ipv4.ct_orig.dst; 3079aba6c5bSPeilin Ye orig.src_port = output->ct.orig_tp.src; 3089aba6c5bSPeilin Ye orig.dst_port = output->ct.orig_tp.dst; 3099aba6c5bSPeilin Ye orig.ipv4_proto = output->ct_orig_proto; 3109aba6c5bSPeilin Ye 3119dd7f890SJarno Rajahalme if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4, 3129dd7f890SJarno Rajahalme sizeof(orig), &orig)) 3139dd7f890SJarno Rajahalme return -EMSGSIZE; 3149dd7f890SJarno Rajahalme } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 3159aba6c5bSPeilin Ye struct ovs_key_ct_tuple_ipv6 orig; 3169aba6c5bSPeilin Ye 3179aba6c5bSPeilin Ye memset(&orig, 0, sizeof(orig)); 3189aba6c5bSPeilin Ye memcpy(orig.ipv6_src, output->ipv6.ct_orig.src.s6_addr32, 3199aba6c5bSPeilin Ye sizeof(orig.ipv6_src)); 3209aba6c5bSPeilin Ye memcpy(orig.ipv6_dst, output->ipv6.ct_orig.dst.s6_addr32, 3219aba6c5bSPeilin Ye sizeof(orig.ipv6_dst)); 3229aba6c5bSPeilin Ye orig.src_port = output->ct.orig_tp.src; 3239aba6c5bSPeilin Ye orig.dst_port = output->ct.orig_tp.dst; 3249aba6c5bSPeilin Ye orig.ipv6_proto = output->ct_orig_proto; 3259aba6c5bSPeilin Ye 3269dd7f890SJarno Rajahalme if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6, 3279dd7f890SJarno Rajahalme sizeof(orig), &orig)) 3289dd7f890SJarno Rajahalme return -EMSGSIZE; 3299dd7f890SJarno Rajahalme } 3309dd7f890SJarno Rajahalme } 3319dd7f890SJarno Rajahalme 332182e3042SJoe Stringer return 0; 333182e3042SJoe Stringer } 334182e3042SJoe Stringer 3356ffcea79SJarno Rajahalme static int ovs_ct_set_mark(struct nf_conn *ct, struct sw_flow_key *key, 336182e3042SJoe Stringer u32 ct_mark, u32 mask) 337182e3042SJoe Stringer { 3380d5cdef8SJoe Stringer #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 339182e3042SJoe Stringer u32 new_mark; 340182e3042SJoe Stringer 341182e3042SJoe Stringer new_mark = ct_mark | (ct->mark & ~(mask)); 342182e3042SJoe Stringer if (ct->mark != new_mark) { 343182e3042SJoe Stringer ct->mark = new_mark; 344193e3096SJarno Rajahalme if (nf_ct_is_confirmed(ct)) 345182e3042SJoe Stringer nf_conntrack_event_cache(IPCT_MARK, ct); 346182e3042SJoe Stringer key->ct.mark = new_mark; 347182e3042SJoe Stringer } 348182e3042SJoe Stringer 3497f8a436eSJoe Stringer return 0; 3500d5cdef8SJoe Stringer #else 3510d5cdef8SJoe Stringer return -ENOTSUPP; 3520d5cdef8SJoe Stringer #endif 3537f8a436eSJoe Stringer } 3547f8a436eSJoe Stringer 3556ffcea79SJarno Rajahalme static struct nf_conn_labels *ovs_ct_get_conn_labels(struct nf_conn *ct) 356c2ac6673SJoe Stringer { 357c2ac6673SJoe Stringer struct nf_conn_labels *cl; 358c2ac6673SJoe Stringer 359c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 360c2ac6673SJoe Stringer if (!cl) { 361c2ac6673SJoe Stringer nf_ct_labels_ext_add(ct); 362c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 363c2ac6673SJoe Stringer } 3646ffcea79SJarno Rajahalme 3656ffcea79SJarno Rajahalme return cl; 3666ffcea79SJarno Rajahalme } 3676ffcea79SJarno Rajahalme 3686ffcea79SJarno Rajahalme /* Initialize labels for a new, yet to be committed conntrack entry. Note that 3696ffcea79SJarno Rajahalme * since the new connection is not yet confirmed, and thus no-one else has 3702317c6b5SJarno Rajahalme * access to it's labels, we simply write them over. 3716ffcea79SJarno Rajahalme */ 3726ffcea79SJarno Rajahalme static int ovs_ct_init_labels(struct nf_conn *ct, struct sw_flow_key *key, 3736ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 3746ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 3756ffcea79SJarno Rajahalme { 37609aa98adSJarno Rajahalme struct nf_conn_labels *cl, *master_cl; 37709aa98adSJarno Rajahalme bool have_mask = labels_nonzero(mask); 37809aa98adSJarno Rajahalme 37909aa98adSJarno Rajahalme /* Inherit master's labels to the related connection? */ 38009aa98adSJarno Rajahalme master_cl = ct->master ? nf_ct_labels_find(ct->master) : NULL; 38109aa98adSJarno Rajahalme 38209aa98adSJarno Rajahalme if (!master_cl && !have_mask) 38309aa98adSJarno Rajahalme return 0; /* Nothing to do. */ 3846ffcea79SJarno Rajahalme 3856ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 386b87cec38SJarno Rajahalme if (!cl) 387c2ac6673SJoe Stringer return -ENOSPC; 388c2ac6673SJoe Stringer 38909aa98adSJarno Rajahalme /* Inherit the master's labels, if any. */ 39009aa98adSJarno Rajahalme if (master_cl) 39109aa98adSJarno Rajahalme *cl = *master_cl; 39209aa98adSJarno Rajahalme 39309aa98adSJarno Rajahalme if (have_mask) { 39409aa98adSJarno Rajahalme u32 *dst = (u32 *)cl->bits; 39509aa98adSJarno Rajahalme int i; 39609aa98adSJarno Rajahalme 3976ffcea79SJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 3986ffcea79SJarno Rajahalme dst[i] = (dst[i] & ~mask->ct_labels_32[i]) | 39909aa98adSJarno Rajahalme (labels->ct_labels_32[i] 40009aa98adSJarno Rajahalme & mask->ct_labels_32[i]); 40109aa98adSJarno Rajahalme } 4026ffcea79SJarno Rajahalme 4032317c6b5SJarno Rajahalme /* Labels are included in the IPCTNL_MSG_CT_NEW event only if the 404abd0a4f2SJarno Rajahalme * IPCT_LABEL bit is set in the event cache. 4052317c6b5SJarno Rajahalme */ 4062317c6b5SJarno Rajahalme nf_conntrack_event_cache(IPCT_LABEL, ct); 4072317c6b5SJarno Rajahalme 4086ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 4096ffcea79SJarno Rajahalme 4106ffcea79SJarno Rajahalme return 0; 4116ffcea79SJarno Rajahalme } 4126ffcea79SJarno Rajahalme 4136ffcea79SJarno Rajahalme static int ovs_ct_set_labels(struct nf_conn *ct, struct sw_flow_key *key, 4146ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 4156ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 4166ffcea79SJarno Rajahalme { 4176ffcea79SJarno Rajahalme struct nf_conn_labels *cl; 4186ffcea79SJarno Rajahalme int err; 4196ffcea79SJarno Rajahalme 4206ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 4216ffcea79SJarno Rajahalme if (!cl) 4226ffcea79SJarno Rajahalme return -ENOSPC; 4236ffcea79SJarno Rajahalme 4246ffcea79SJarno Rajahalme err = nf_connlabels_replace(ct, labels->ct_labels_32, 425cb80d58fSJarno Rajahalme mask->ct_labels_32, 426cb80d58fSJarno Rajahalme OVS_CT_LABELS_LEN_32); 427c2ac6673SJoe Stringer if (err) 428c2ac6673SJoe Stringer return err; 429193e3096SJarno Rajahalme 4306ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 431c2ac6673SJoe Stringer 432c2ac6673SJoe Stringer return 0; 433c2ac6673SJoe Stringer } 434c2ac6673SJoe Stringer 435cae3a262SJoe Stringer /* 'skb' should already be pulled to nh_ofs. */ 436cae3a262SJoe Stringer static int ovs_ct_helper(struct sk_buff *skb, u16 proto) 437cae3a262SJoe Stringer { 438cae3a262SJoe Stringer const struct nf_conntrack_helper *helper; 439cae3a262SJoe Stringer const struct nf_conn_help *help; 440cae3a262SJoe Stringer enum ip_conntrack_info ctinfo; 441cae3a262SJoe Stringer unsigned int protoff; 442cae3a262SJoe Stringer struct nf_conn *ct; 44305752523SJarno Rajahalme int err; 444cae3a262SJoe Stringer 445cae3a262SJoe Stringer ct = nf_ct_get(skb, &ctinfo); 446cae3a262SJoe Stringer if (!ct || ctinfo == IP_CT_RELATED_REPLY) 447cae3a262SJoe Stringer return NF_ACCEPT; 448cae3a262SJoe Stringer 449cae3a262SJoe Stringer help = nfct_help(ct); 450cae3a262SJoe Stringer if (!help) 451cae3a262SJoe Stringer return NF_ACCEPT; 452cae3a262SJoe Stringer 453cae3a262SJoe Stringer helper = rcu_dereference(help->helper); 454cae3a262SJoe Stringer if (!helper) 455cae3a262SJoe Stringer return NF_ACCEPT; 456cae3a262SJoe Stringer 457cae3a262SJoe Stringer switch (proto) { 458cae3a262SJoe Stringer case NFPROTO_IPV4: 459cae3a262SJoe Stringer protoff = ip_hdrlen(skb); 460cae3a262SJoe Stringer break; 461cae3a262SJoe Stringer case NFPROTO_IPV6: { 462cae3a262SJoe Stringer u8 nexthdr = ipv6_hdr(skb)->nexthdr; 463cae3a262SJoe Stringer __be16 frag_off; 464cc570605SJoe Stringer int ofs; 465cae3a262SJoe Stringer 466cc570605SJoe Stringer ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr, 467cc570605SJoe Stringer &frag_off); 468cc570605SJoe Stringer if (ofs < 0 || (frag_off & htons(~0x7)) != 0) { 469cae3a262SJoe Stringer pr_debug("proto header not found\n"); 470cae3a262SJoe Stringer return NF_ACCEPT; 471cae3a262SJoe Stringer } 472cc570605SJoe Stringer protoff = ofs; 473cae3a262SJoe Stringer break; 474cae3a262SJoe Stringer } 475cae3a262SJoe Stringer default: 476cae3a262SJoe Stringer WARN_ONCE(1, "helper invoked on non-IP family!"); 477cae3a262SJoe Stringer return NF_DROP; 478cae3a262SJoe Stringer } 479cae3a262SJoe Stringer 48005752523SJarno Rajahalme err = helper->help(skb, protoff, ct, ctinfo); 48105752523SJarno Rajahalme if (err != NF_ACCEPT) 48205752523SJarno Rajahalme return err; 48305752523SJarno Rajahalme 48405752523SJarno Rajahalme /* Adjust seqs after helper. This is needed due to some helpers (e.g., 48505752523SJarno Rajahalme * FTP with NAT) adusting the TCP payload size when mangling IP 48605752523SJarno Rajahalme * addresses and/or port numbers in the text-based control connection. 48705752523SJarno Rajahalme */ 48805752523SJarno Rajahalme if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) && 48905752523SJarno Rajahalme !nf_ct_seq_adjust(skb, ct, ctinfo, protoff)) 49005752523SJarno Rajahalme return NF_DROP; 49105752523SJarno Rajahalme return NF_ACCEPT; 492cae3a262SJoe Stringer } 493cae3a262SJoe Stringer 49474c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 49574c16618SJoe Stringer * value if 'skb' is freed. 49674c16618SJoe Stringer */ 4977f8a436eSJoe Stringer static int handle_fragments(struct net *net, struct sw_flow_key *key, 4987f8a436eSJoe Stringer u16 zone, struct sk_buff *skb) 4997f8a436eSJoe Stringer { 5007f8a436eSJoe Stringer struct ovs_skb_cb ovs_cb = *OVS_CB(skb); 501daaa7d64SFlorian Westphal int err; 5027f8a436eSJoe Stringer 5037f8a436eSJoe Stringer if (key->eth.type == htons(ETH_P_IP)) { 5047f8a436eSJoe Stringer enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; 5057f8a436eSJoe Stringer 5067f8a436eSJoe Stringer memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); 50719bcf9f2SEric W. Biederman err = ip_defrag(net, skb, user); 5087f8a436eSJoe Stringer if (err) 5097f8a436eSJoe Stringer return err; 5107f8a436eSJoe Stringer 5117f8a436eSJoe Stringer ovs_cb.mru = IPCB(skb)->frag_max_size; 5127f8a436eSJoe Stringer #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 51374c16618SJoe Stringer } else if (key->eth.type == htons(ETH_P_IPV6)) { 5147f8a436eSJoe Stringer enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; 5157f8a436eSJoe Stringer 5167f8a436eSJoe Stringer memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); 517daaa7d64SFlorian Westphal err = nf_ct_frag6_gather(net, skb, user); 518f92a80a9SDaniele Di Proietto if (err) { 519f92a80a9SDaniele Di Proietto if (err != -EINPROGRESS) 520f92a80a9SDaniele Di Proietto kfree_skb(skb); 521daaa7d64SFlorian Westphal return err; 522f92a80a9SDaniele Di Proietto } 5237f8a436eSJoe Stringer 524daaa7d64SFlorian Westphal key->ip.proto = ipv6_hdr(skb)->nexthdr; 5257f8a436eSJoe Stringer ovs_cb.mru = IP6CB(skb)->frag_max_size; 5267f8a436eSJoe Stringer #endif 5277f8a436eSJoe Stringer } else { 52874c16618SJoe Stringer kfree_skb(skb); 5297f8a436eSJoe Stringer return -EPFNOSUPPORT; 5307f8a436eSJoe Stringer } 5317f8a436eSJoe Stringer 532ad06a566SGreg Rose /* The key extracted from the fragment that completed this datagram 533ad06a566SGreg Rose * likely didn't have an L4 header, so regenerate it. 534ad06a566SGreg Rose */ 535ad06a566SGreg Rose ovs_flow_key_update_l3l4(skb, key); 536ad06a566SGreg Rose 5377f8a436eSJoe Stringer key->ip.frag = OVS_FRAG_TYPE_NONE; 5387f8a436eSJoe Stringer skb_clear_hash(skb); 5397f8a436eSJoe Stringer skb->ignore_df = 1; 5407f8a436eSJoe Stringer *OVS_CB(skb) = ovs_cb; 5417f8a436eSJoe Stringer 5427f8a436eSJoe Stringer return 0; 5437f8a436eSJoe Stringer } 5447f8a436eSJoe Stringer 5457f8a436eSJoe Stringer static struct nf_conntrack_expect * 5467f8a436eSJoe Stringer ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone, 5477f8a436eSJoe Stringer u16 proto, const struct sk_buff *skb) 5487f8a436eSJoe Stringer { 5497f8a436eSJoe Stringer struct nf_conntrack_tuple tuple; 550cf5d7091SJarno Rajahalme struct nf_conntrack_expect *exp; 5517f8a436eSJoe Stringer 552a31f1adcSEric W. Biederman if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, net, &tuple)) 5537f8a436eSJoe Stringer return NULL; 554cf5d7091SJarno Rajahalme 555cf5d7091SJarno Rajahalme exp = __nf_ct_expect_find(net, zone, &tuple); 556cf5d7091SJarno Rajahalme if (exp) { 557cf5d7091SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 558cf5d7091SJarno Rajahalme 559cf5d7091SJarno Rajahalme /* Delete existing conntrack entry, if it clashes with the 560cf5d7091SJarno Rajahalme * expectation. This can happen since conntrack ALGs do not 561cf5d7091SJarno Rajahalme * check for clashes between (new) expectations and existing 562cf5d7091SJarno Rajahalme * conntrack entries. nf_conntrack_in() will check the 563cf5d7091SJarno Rajahalme * expectations only if a conntrack entry can not be found, 564cf5d7091SJarno Rajahalme * which can lead to OVS finding the expectation (here) in the 565cf5d7091SJarno Rajahalme * init direction, but which will not be removed by the 566cf5d7091SJarno Rajahalme * nf_conntrack_in() call, if a matching conntrack entry is 567cf5d7091SJarno Rajahalme * found instead. In this case all init direction packets 568cf5d7091SJarno Rajahalme * would be reported as new related packets, while reply 569cf5d7091SJarno Rajahalme * direction packets would be reported as un-related 570cf5d7091SJarno Rajahalme * established packets. 571cf5d7091SJarno Rajahalme */ 572cf5d7091SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 573cf5d7091SJarno Rajahalme if (h) { 574cf5d7091SJarno Rajahalme struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 575cf5d7091SJarno Rajahalme 576cf5d7091SJarno Rajahalme nf_ct_delete(ct, 0, 0); 577cf5d7091SJarno Rajahalme nf_conntrack_put(&ct->ct_general); 578cf5d7091SJarno Rajahalme } 579cf5d7091SJarno Rajahalme } 580cf5d7091SJarno Rajahalme 581cf5d7091SJarno Rajahalme return exp; 5827f8a436eSJoe Stringer } 5837f8a436eSJoe Stringer 584289f2253SJarno Rajahalme /* This replicates logic from nf_conntrack_core.c that is not exported. */ 585289f2253SJarno Rajahalme static enum ip_conntrack_info 586289f2253SJarno Rajahalme ovs_ct_get_info(const struct nf_conntrack_tuple_hash *h) 587289f2253SJarno Rajahalme { 588289f2253SJarno Rajahalme const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 589289f2253SJarno Rajahalme 590289f2253SJarno Rajahalme if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) 591289f2253SJarno Rajahalme return IP_CT_ESTABLISHED_REPLY; 592289f2253SJarno Rajahalme /* Once we've had two way comms, always ESTABLISHED. */ 593289f2253SJarno Rajahalme if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) 594289f2253SJarno Rajahalme return IP_CT_ESTABLISHED; 595289f2253SJarno Rajahalme if (test_bit(IPS_EXPECTED_BIT, &ct->status)) 596289f2253SJarno Rajahalme return IP_CT_RELATED; 597289f2253SJarno Rajahalme return IP_CT_NEW; 598289f2253SJarno Rajahalme } 599289f2253SJarno Rajahalme 600289f2253SJarno Rajahalme /* Find an existing connection which this packet belongs to without 601289f2253SJarno Rajahalme * re-attributing statistics or modifying the connection state. This allows an 6025e17da63SJarno Rajahalme * skb->_nfct lost due to an upcall to be recovered during actions execution. 603289f2253SJarno Rajahalme * 604289f2253SJarno Rajahalme * Must be called with rcu_read_lock. 605289f2253SJarno Rajahalme * 6065e17da63SJarno Rajahalme * On success, populates skb->_nfct and returns the connection. Returns NULL 6075e17da63SJarno Rajahalme * if there is no existing entry. 608289f2253SJarno Rajahalme */ 609289f2253SJarno Rajahalme static struct nf_conn * 610289f2253SJarno Rajahalme ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone, 6119ff464dbSJarno Rajahalme u8 l3num, struct sk_buff *skb, bool natted) 612289f2253SJarno Rajahalme { 613289f2253SJarno Rajahalme struct nf_conntrack_tuple tuple; 614289f2253SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 615289f2253SJarno Rajahalme struct nf_conn *ct; 616289f2253SJarno Rajahalme 61760e3be94SFlorian Westphal if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), l3num, 61860e3be94SFlorian Westphal net, &tuple)) { 619289f2253SJarno Rajahalme pr_debug("ovs_ct_find_existing: Can't get tuple\n"); 620289f2253SJarno Rajahalme return NULL; 621289f2253SJarno Rajahalme } 622289f2253SJarno Rajahalme 6239ff464dbSJarno Rajahalme /* Must invert the tuple if skb has been transformed by NAT. */ 6249ff464dbSJarno Rajahalme if (natted) { 6259ff464dbSJarno Rajahalme struct nf_conntrack_tuple inverse; 6269ff464dbSJarno Rajahalme 627303e0c55SFlorian Westphal if (!nf_ct_invert_tuple(&inverse, &tuple)) { 6289ff464dbSJarno Rajahalme pr_debug("ovs_ct_find_existing: Inversion failed!\n"); 6299ff464dbSJarno Rajahalme return NULL; 6309ff464dbSJarno Rajahalme } 6319ff464dbSJarno Rajahalme tuple = inverse; 6329ff464dbSJarno Rajahalme } 6339ff464dbSJarno Rajahalme 634289f2253SJarno Rajahalme /* look for tuple match */ 635289f2253SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 636289f2253SJarno Rajahalme if (!h) 637289f2253SJarno Rajahalme return NULL; /* Not found. */ 638289f2253SJarno Rajahalme 639289f2253SJarno Rajahalme ct = nf_ct_tuplehash_to_ctrack(h); 640289f2253SJarno Rajahalme 6419ff464dbSJarno Rajahalme /* Inverted packet tuple matches the reverse direction conntrack tuple, 6429ff464dbSJarno Rajahalme * select the other tuplehash to get the right 'ctinfo' bits for this 6439ff464dbSJarno Rajahalme * packet. 6449ff464dbSJarno Rajahalme */ 6459ff464dbSJarno Rajahalme if (natted) 6469ff464dbSJarno Rajahalme h = &ct->tuplehash[!h->tuple.dst.dir]; 6479ff464dbSJarno Rajahalme 648c74454faSFlorian Westphal nf_ct_set(skb, ct, ovs_ct_get_info(h)); 649289f2253SJarno Rajahalme return ct; 650289f2253SJarno Rajahalme } 651289f2253SJarno Rajahalme 6528b97ac5bSGreg Rose static 6538b97ac5bSGreg Rose struct nf_conn *ovs_ct_executed(struct net *net, 6548b97ac5bSGreg Rose const struct sw_flow_key *key, 6558b97ac5bSGreg Rose const struct ovs_conntrack_info *info, 6568b97ac5bSGreg Rose struct sk_buff *skb, 6578b97ac5bSGreg Rose bool *ct_executed) 6588b97ac5bSGreg Rose { 6598b97ac5bSGreg Rose struct nf_conn *ct = NULL; 6608b97ac5bSGreg Rose 6618b97ac5bSGreg Rose /* If no ct, check if we have evidence that an existing conntrack entry 6628b97ac5bSGreg Rose * might be found for this skb. This happens when we lose a skb->_nfct 6638b97ac5bSGreg Rose * due to an upcall, or if the direction is being forced. If the 6648b97ac5bSGreg Rose * connection was not confirmed, it is not cached and needs to be run 6658b97ac5bSGreg Rose * through conntrack again. 6668b97ac5bSGreg Rose */ 6678b97ac5bSGreg Rose *ct_executed = (key->ct_state & OVS_CS_F_TRACKED) && 6688b97ac5bSGreg Rose !(key->ct_state & OVS_CS_F_INVALID) && 6698b97ac5bSGreg Rose (key->ct_zone == info->zone.id); 6708b97ac5bSGreg Rose 6718b97ac5bSGreg Rose if (*ct_executed || (!key->ct_state && info->force)) { 6728b97ac5bSGreg Rose ct = ovs_ct_find_existing(net, &info->zone, info->family, skb, 6738b97ac5bSGreg Rose !!(key->ct_state & 6748b97ac5bSGreg Rose OVS_CS_F_NAT_MASK)); 6758b97ac5bSGreg Rose } 6768b97ac5bSGreg Rose 6778b97ac5bSGreg Rose return ct; 6788b97ac5bSGreg Rose } 6798b97ac5bSGreg Rose 6805e17da63SJarno Rajahalme /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ 681289f2253SJarno Rajahalme static bool skb_nfct_cached(struct net *net, 682289f2253SJarno Rajahalme const struct sw_flow_key *key, 683289f2253SJarno Rajahalme const struct ovs_conntrack_info *info, 684289f2253SJarno Rajahalme struct sk_buff *skb) 6857f8a436eSJoe Stringer { 6867f8a436eSJoe Stringer enum ip_conntrack_info ctinfo; 6877f8a436eSJoe Stringer struct nf_conn *ct; 6888b97ac5bSGreg Rose bool ct_executed = true; 6897f8a436eSJoe Stringer 6907f8a436eSJoe Stringer ct = nf_ct_get(skb, &ctinfo); 6918b97ac5bSGreg Rose if (!ct) 6928b97ac5bSGreg Rose ct = ovs_ct_executed(net, key, info, skb, &ct_executed); 6938b97ac5bSGreg Rose 694dd41d33fSJarno Rajahalme if (ct) 695dd41d33fSJarno Rajahalme nf_ct_get(skb, &ctinfo); 6968b97ac5bSGreg Rose else 6977f8a436eSJoe Stringer return false; 6988b97ac5bSGreg Rose 6997f8a436eSJoe Stringer if (!net_eq(net, read_pnet(&ct->ct_net))) 7007f8a436eSJoe Stringer return false; 7017f8a436eSJoe Stringer if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct))) 7027f8a436eSJoe Stringer return false; 703cae3a262SJoe Stringer if (info->helper) { 704cae3a262SJoe Stringer struct nf_conn_help *help; 705cae3a262SJoe Stringer 706cae3a262SJoe Stringer help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER); 707cae3a262SJoe Stringer if (help && rcu_access_pointer(help->helper) != info->helper) 708cae3a262SJoe Stringer return false; 709cae3a262SJoe Stringer } 71071778951SYi-Hung Wei if (info->nf_ct_timeout) { 71171778951SYi-Hung Wei struct nf_conn_timeout *timeout_ext; 71271778951SYi-Hung Wei 71371778951SYi-Hung Wei timeout_ext = nf_ct_timeout_find(ct); 71471778951SYi-Hung Wei if (!timeout_ext || info->nf_ct_timeout != 71571778951SYi-Hung Wei rcu_dereference(timeout_ext->timeout)) 71671778951SYi-Hung Wei return false; 71771778951SYi-Hung Wei } 718dd41d33fSJarno Rajahalme /* Force conntrack entry direction to the current packet? */ 719dd41d33fSJarno Rajahalme if (info->force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { 720dd41d33fSJarno Rajahalme /* Delete the conntrack entry if confirmed, else just release 721dd41d33fSJarno Rajahalme * the reference. 722dd41d33fSJarno Rajahalme */ 723dd41d33fSJarno Rajahalme if (nf_ct_is_confirmed(ct)) 724dd41d33fSJarno Rajahalme nf_ct_delete(ct, 0, 0); 725b768b16dSJarno Rajahalme 726dd41d33fSJarno Rajahalme nf_conntrack_put(&ct->ct_general); 727dd41d33fSJarno Rajahalme nf_ct_set(skb, NULL, 0); 728dd41d33fSJarno Rajahalme return false; 729dd41d33fSJarno Rajahalme } 7307f8a436eSJoe Stringer 7318b97ac5bSGreg Rose return ct_executed; 7327f8a436eSJoe Stringer } 7337f8a436eSJoe Stringer 7344806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 73505752523SJarno Rajahalme /* Modelled after nf_nat_ipv[46]_fn(). 73605752523SJarno Rajahalme * range is only used for new, uninitialized NAT state. 73705752523SJarno Rajahalme * Returns either NF_ACCEPT or NF_DROP. 73805752523SJarno Rajahalme */ 73905752523SJarno Rajahalme static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct, 74005752523SJarno Rajahalme enum ip_conntrack_info ctinfo, 7412eb0f624SThierry Du Tre const struct nf_nat_range2 *range, 74205752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 74305752523SJarno Rajahalme { 74405752523SJarno Rajahalme int hooknum, nh_off, err = NF_ACCEPT; 74505752523SJarno Rajahalme 74605752523SJarno Rajahalme nh_off = skb_network_offset(skb); 74775f01a4cSLance Richardson skb_pull_rcsum(skb, nh_off); 74805752523SJarno Rajahalme 74905752523SJarno Rajahalme /* See HOOK2MANIP(). */ 75005752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) 75105752523SJarno Rajahalme hooknum = NF_INET_LOCAL_IN; /* Source NAT */ 75205752523SJarno Rajahalme else 75305752523SJarno Rajahalme hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */ 75405752523SJarno Rajahalme 75505752523SJarno Rajahalme switch (ctinfo) { 75605752523SJarno Rajahalme case IP_CT_RELATED: 75705752523SJarno Rajahalme case IP_CT_RELATED_REPLY: 7583bf195aeSFlorian Westphal if (IS_ENABLED(CONFIG_NF_NAT) && 75999b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IP) && 76005752523SJarno Rajahalme ip_hdr(skb)->protocol == IPPROTO_ICMP) { 76105752523SJarno Rajahalme if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo, 76205752523SJarno Rajahalme hooknum)) 76305752523SJarno Rajahalme err = NF_DROP; 76405752523SJarno Rajahalme goto push; 7653bf195aeSFlorian Westphal } else if (IS_ENABLED(CONFIG_IPV6) && 76699b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IPV6)) { 76705752523SJarno Rajahalme __be16 frag_off; 76805752523SJarno Rajahalme u8 nexthdr = ipv6_hdr(skb)->nexthdr; 76905752523SJarno Rajahalme int hdrlen = ipv6_skip_exthdr(skb, 77005752523SJarno Rajahalme sizeof(struct ipv6hdr), 77105752523SJarno Rajahalme &nexthdr, &frag_off); 77205752523SJarno Rajahalme 77305752523SJarno Rajahalme if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) { 77405752523SJarno Rajahalme if (!nf_nat_icmpv6_reply_translation(skb, ct, 77505752523SJarno Rajahalme ctinfo, 77605752523SJarno Rajahalme hooknum, 77705752523SJarno Rajahalme hdrlen)) 77805752523SJarno Rajahalme err = NF_DROP; 77905752523SJarno Rajahalme goto push; 78005752523SJarno Rajahalme } 78105752523SJarno Rajahalme } 78205752523SJarno Rajahalme /* Non-ICMP, fall thru to initialize if needed. */ 783df561f66SGustavo A. R. Silva fallthrough; 78405752523SJarno Rajahalme case IP_CT_NEW: 78505752523SJarno Rajahalme /* Seen it before? This can happen for loopback, retrans, 78605752523SJarno Rajahalme * or local packets. 78705752523SJarno Rajahalme */ 78805752523SJarno Rajahalme if (!nf_nat_initialized(ct, maniptype)) { 78905752523SJarno Rajahalme /* Initialize according to the NAT action. */ 79005752523SJarno Rajahalme err = (range && range->flags & NF_NAT_RANGE_MAP_IPS) 79105752523SJarno Rajahalme /* Action is set up to establish a new 79205752523SJarno Rajahalme * mapping. 79305752523SJarno Rajahalme */ 79405752523SJarno Rajahalme ? nf_nat_setup_info(ct, range, maniptype) 79505752523SJarno Rajahalme : nf_nat_alloc_null_binding(ct, hooknum); 79605752523SJarno Rajahalme if (err != NF_ACCEPT) 79705752523SJarno Rajahalme goto push; 79805752523SJarno Rajahalme } 79905752523SJarno Rajahalme break; 80005752523SJarno Rajahalme 80105752523SJarno Rajahalme case IP_CT_ESTABLISHED: 80205752523SJarno Rajahalme case IP_CT_ESTABLISHED_REPLY: 80305752523SJarno Rajahalme break; 80405752523SJarno Rajahalme 80505752523SJarno Rajahalme default: 80605752523SJarno Rajahalme err = NF_DROP; 80705752523SJarno Rajahalme goto push; 80805752523SJarno Rajahalme } 80905752523SJarno Rajahalme 81005752523SJarno Rajahalme err = nf_nat_packet(ct, ctinfo, hooknum, skb); 81105752523SJarno Rajahalme push: 812*7d42e84eSChristophe JAILLET skb_push_rcsum(skb, nh_off); 81305752523SJarno Rajahalme 81405752523SJarno Rajahalme return err; 81505752523SJarno Rajahalme } 81605752523SJarno Rajahalme 81705752523SJarno Rajahalme static void ovs_nat_update_key(struct sw_flow_key *key, 81805752523SJarno Rajahalme const struct sk_buff *skb, 81905752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 82005752523SJarno Rajahalme { 82105752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) { 82205752523SJarno Rajahalme __be16 src; 82305752523SJarno Rajahalme 824316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_SRC_NAT; 82505752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 82605752523SJarno Rajahalme key->ipv4.addr.src = ip_hdr(skb)->saddr; 82705752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 82805752523SJarno Rajahalme memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr, 82905752523SJarno Rajahalme sizeof(key->ipv6.addr.src)); 83005752523SJarno Rajahalme else 83105752523SJarno Rajahalme return; 83205752523SJarno Rajahalme 83305752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 83405752523SJarno Rajahalme src = udp_hdr(skb)->source; 83505752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 83605752523SJarno Rajahalme src = tcp_hdr(skb)->source; 83705752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 83805752523SJarno Rajahalme src = sctp_hdr(skb)->source; 83905752523SJarno Rajahalme else 84005752523SJarno Rajahalme return; 84105752523SJarno Rajahalme 84205752523SJarno Rajahalme key->tp.src = src; 84305752523SJarno Rajahalme } else { 84405752523SJarno Rajahalme __be16 dst; 84505752523SJarno Rajahalme 846316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_DST_NAT; 84705752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 84805752523SJarno Rajahalme key->ipv4.addr.dst = ip_hdr(skb)->daddr; 84905752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 85005752523SJarno Rajahalme memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr, 85105752523SJarno Rajahalme sizeof(key->ipv6.addr.dst)); 85205752523SJarno Rajahalme else 85305752523SJarno Rajahalme return; 85405752523SJarno Rajahalme 85505752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 85605752523SJarno Rajahalme dst = udp_hdr(skb)->dest; 85705752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 85805752523SJarno Rajahalme dst = tcp_hdr(skb)->dest; 85905752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 86005752523SJarno Rajahalme dst = sctp_hdr(skb)->dest; 86105752523SJarno Rajahalme else 86205752523SJarno Rajahalme return; 86305752523SJarno Rajahalme 86405752523SJarno Rajahalme key->tp.dst = dst; 86505752523SJarno Rajahalme } 86605752523SJarno Rajahalme } 86705752523SJarno Rajahalme 86805752523SJarno Rajahalme /* Returns NF_DROP if the packet should be dropped, NF_ACCEPT otherwise. */ 86905752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 87005752523SJarno Rajahalme const struct ovs_conntrack_info *info, 87105752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 87205752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 87305752523SJarno Rajahalme { 87405752523SJarno Rajahalme enum nf_nat_manip_type maniptype; 87505752523SJarno Rajahalme int err; 87605752523SJarno Rajahalme 87705752523SJarno Rajahalme /* Add NAT extension if not confirmed yet. */ 87805752523SJarno Rajahalme if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct)) 87905752523SJarno Rajahalme return NF_ACCEPT; /* Can't NAT. */ 88005752523SJarno Rajahalme 88105752523SJarno Rajahalme /* Determine NAT type. 88205752523SJarno Rajahalme * Check if the NAT type can be deduced from the tracked connection. 8835745b0beSJarno Rajahalme * Make sure new expected connections (IP_CT_RELATED) are NATted only 8845745b0beSJarno Rajahalme * when committing. 88505752523SJarno Rajahalme */ 88605752523SJarno Rajahalme if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW && 88705752523SJarno Rajahalme ct->status & IPS_NAT_MASK && 8885745b0beSJarno Rajahalme (ctinfo != IP_CT_RELATED || info->commit)) { 88905752523SJarno Rajahalme /* NAT an established or related connection like before. */ 89005752523SJarno Rajahalme if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) 89105752523SJarno Rajahalme /* This is the REPLY direction for a connection 89205752523SJarno Rajahalme * for which NAT was applied in the forward 89305752523SJarno Rajahalme * direction. Do the reverse NAT. 89405752523SJarno Rajahalme */ 89505752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 89605752523SJarno Rajahalme ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC; 89705752523SJarno Rajahalme else 89805752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 89905752523SJarno Rajahalme ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST; 90005752523SJarno Rajahalme } else if (info->nat & OVS_CT_SRC_NAT) { 90105752523SJarno Rajahalme maniptype = NF_NAT_MANIP_SRC; 90205752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 90305752523SJarno Rajahalme maniptype = NF_NAT_MANIP_DST; 90405752523SJarno Rajahalme } else { 90505752523SJarno Rajahalme return NF_ACCEPT; /* Connection is not NATed. */ 90605752523SJarno Rajahalme } 90705752523SJarno Rajahalme err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, maniptype); 90805752523SJarno Rajahalme 9098aa7b526SDumitru Ceara if (err == NF_ACCEPT && ct->status & IPS_DST_NAT) { 9108aa7b526SDumitru Ceara if (ct->status & IPS_SRC_NAT) { 9115d50aa83SAaron Conole if (maniptype == NF_NAT_MANIP_SRC) 9125d50aa83SAaron Conole maniptype = NF_NAT_MANIP_DST; 9135d50aa83SAaron Conole else 9145d50aa83SAaron Conole maniptype = NF_NAT_MANIP_SRC; 9155d50aa83SAaron Conole 9165d50aa83SAaron Conole err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, 9175d50aa83SAaron Conole maniptype); 9188aa7b526SDumitru Ceara } else if (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) { 9198aa7b526SDumitru Ceara err = ovs_ct_nat_execute(skb, ct, ctinfo, NULL, 9208aa7b526SDumitru Ceara NF_NAT_MANIP_SRC); 9218aa7b526SDumitru Ceara } 9225d50aa83SAaron Conole } 9235d50aa83SAaron Conole 92405752523SJarno Rajahalme /* Mark NAT done if successful and update the flow key. */ 92505752523SJarno Rajahalme if (err == NF_ACCEPT) 92605752523SJarno Rajahalme ovs_nat_update_key(key, skb, maniptype); 92705752523SJarno Rajahalme 92805752523SJarno Rajahalme return err; 92905752523SJarno Rajahalme } 9304806e975SFlorian Westphal #else /* !CONFIG_NF_NAT */ 93105752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 93205752523SJarno Rajahalme const struct ovs_conntrack_info *info, 93305752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 93405752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 93505752523SJarno Rajahalme { 93605752523SJarno Rajahalme return NF_ACCEPT; 93705752523SJarno Rajahalme } 93805752523SJarno Rajahalme #endif 93905752523SJarno Rajahalme 9409f13ded8SJarno Rajahalme /* Pass 'skb' through conntrack in 'net', using zone configured in 'info', if 941394e910eSJarno Rajahalme * not done already. Update key with new CT state after passing the packet 942394e910eSJarno Rajahalme * through conntrack. 9435e17da63SJarno Rajahalme * Note that if the packet is deemed invalid by conntrack, skb->_nfct will be 9449f13ded8SJarno Rajahalme * set to NULL and 0 will be returned. 9459f13ded8SJarno Rajahalme */ 9464f0909eeSJoe Stringer static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 9477f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 9487f8a436eSJoe Stringer struct sk_buff *skb) 9497f8a436eSJoe Stringer { 9507f8a436eSJoe Stringer /* If we are recirculating packets to match on conntrack fields and 9517f8a436eSJoe Stringer * committing with a separate conntrack action, then we don't need to 9527f8a436eSJoe Stringer * actually run the packet through conntrack twice unless it's for a 9537f8a436eSJoe Stringer * different zone. 9547f8a436eSJoe Stringer */ 95528b6e0c1SJarno Rajahalme bool cached = skb_nfct_cached(net, key, info, skb); 95628b6e0c1SJarno Rajahalme enum ip_conntrack_info ctinfo; 95728b6e0c1SJarno Rajahalme struct nf_conn *ct; 95828b6e0c1SJarno Rajahalme 95928b6e0c1SJarno Rajahalme if (!cached) { 96093e66024SFlorian Westphal struct nf_hook_state state = { 96193e66024SFlorian Westphal .hook = NF_INET_PRE_ROUTING, 96293e66024SFlorian Westphal .pf = info->family, 96393e66024SFlorian Westphal .net = net, 96493e66024SFlorian Westphal }; 9657f8a436eSJoe Stringer struct nf_conn *tmpl = info->ct; 9665b6b9293SJarno Rajahalme int err; 9677f8a436eSJoe Stringer 9687f8a436eSJoe Stringer /* Associate skb with specified zone. */ 9697f8a436eSJoe Stringer if (tmpl) { 970cb9c6836SFlorian Westphal if (skb_nfct(skb)) 971cb9c6836SFlorian Westphal nf_conntrack_put(skb_nfct(skb)); 9727f8a436eSJoe Stringer nf_conntrack_get(&tmpl->ct_general); 973c74454faSFlorian Westphal nf_ct_set(skb, tmpl, IP_CT_NEW); 9747f8a436eSJoe Stringer } 9757f8a436eSJoe Stringer 97693e66024SFlorian Westphal err = nf_conntrack_in(skb, &state); 9775b6b9293SJarno Rajahalme if (err != NF_ACCEPT) 9787f8a436eSJoe Stringer return -ENOENT; 979cae3a262SJoe Stringer 98005752523SJarno Rajahalme /* Clear CT state NAT flags to mark that we have not yet done 98105752523SJarno Rajahalme * NAT after the nf_conntrack_in() call. We can actually clear 98205752523SJarno Rajahalme * the whole state, as it will be re-initialized below. 98305752523SJarno Rajahalme */ 984316d4d78SJarno Rajahalme key->ct_state = 0; 98505752523SJarno Rajahalme 98605752523SJarno Rajahalme /* Update the key, but keep the NAT flags. */ 98705752523SJarno Rajahalme ovs_ct_update_key(skb, info, key, true, true); 98805752523SJarno Rajahalme } 98905752523SJarno Rajahalme 99005752523SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 99105752523SJarno Rajahalme if (ct) { 992248d45f1SYi-Hung Wei bool add_helper = false; 993248d45f1SYi-Hung Wei 99405752523SJarno Rajahalme /* Packets starting a new connection must be NATted before the 99505752523SJarno Rajahalme * helper, so that the helper knows about the NAT. We enforce 99605752523SJarno Rajahalme * this by delaying both NAT and helper calls for unconfirmed 99705752523SJarno Rajahalme * connections until the committing CT action. For later 99805752523SJarno Rajahalme * packets NAT and Helper may be called in either order. 99905752523SJarno Rajahalme * 100005752523SJarno Rajahalme * NAT will be done only if the CT action has NAT, and only 100105752523SJarno Rajahalme * once per packet (per zone), as guarded by the NAT bits in 1002316d4d78SJarno Rajahalme * the key->ct_state. 100305752523SJarno Rajahalme */ 1004316d4d78SJarno Rajahalme if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) && 100505752523SJarno Rajahalme (nf_ct_is_confirmed(ct) || info->commit) && 100605752523SJarno Rajahalme ovs_ct_nat(net, key, info, skb, ct, ctinfo) != NF_ACCEPT) { 100705752523SJarno Rajahalme return -EINVAL; 100828b6e0c1SJarno Rajahalme } 1009394e910eSJarno Rajahalme 101016ec3d4fSJoe Stringer /* Userspace may decide to perform a ct lookup without a helper 1011248d45f1SYi-Hung Wei * specified followed by a (recirculate and) commit with one, 1012248d45f1SYi-Hung Wei * or attach a helper in a later commit. Therefore, for 1013248d45f1SYi-Hung Wei * connections which we will commit, we may need to attach 1014248d45f1SYi-Hung Wei * the helper here. 101516ec3d4fSJoe Stringer */ 1016248d45f1SYi-Hung Wei if (info->commit && info->helper && !nfct_help(ct)) { 101716ec3d4fSJoe Stringer int err = __nf_ct_try_assign_helper(ct, info->ct, 101816ec3d4fSJoe Stringer GFP_ATOMIC); 101916ec3d4fSJoe Stringer if (err) 102016ec3d4fSJoe Stringer return err; 1021248d45f1SYi-Hung Wei add_helper = true; 1022fa7e428cSFlavio Leitner 1023fa7e428cSFlavio Leitner /* helper installed, add seqadj if NAT is required */ 1024fa7e428cSFlavio Leitner if (info->nat && !nfct_seqadj(ct)) { 1025fa7e428cSFlavio Leitner if (!nfct_seqadj_ext_add(ct)) 1026fa7e428cSFlavio Leitner return -EINVAL; 1027fa7e428cSFlavio Leitner } 102816ec3d4fSJoe Stringer } 102916ec3d4fSJoe Stringer 103028b6e0c1SJarno Rajahalme /* Call the helper only if: 1031248d45f1SYi-Hung Wei * - nf_conntrack_in() was executed above ("!cached") or a 1032248d45f1SYi-Hung Wei * helper was just attached ("add_helper") for a confirmed 1033248d45f1SYi-Hung Wei * connection, or 103428b6e0c1SJarno Rajahalme * - When committing an unconfirmed connection. 103528b6e0c1SJarno Rajahalme */ 1036248d45f1SYi-Hung Wei if ((nf_ct_is_confirmed(ct) ? !cached || add_helper : 1037248d45f1SYi-Hung Wei info->commit) && 103828b6e0c1SJarno Rajahalme ovs_ct_helper(skb, info->family) != NF_ACCEPT) { 1039cae3a262SJoe Stringer return -EINVAL; 1040cae3a262SJoe Stringer } 1041e2ef5203SNuman Siddique 1042e2ef5203SNuman Siddique if (nf_ct_protonum(ct) == IPPROTO_TCP && 1043e2ef5203SNuman Siddique nf_ct_is_confirmed(ct) && nf_conntrack_tcp_established(ct)) { 1044e2ef5203SNuman Siddique /* Be liberal for tcp packets so that out-of-window 1045e2ef5203SNuman Siddique * packets are not marked invalid. 1046e2ef5203SNuman Siddique */ 1047e2ef5203SNuman Siddique nf_ct_set_tcp_be_liberal(ct); 1048e2ef5203SNuman Siddique } 104905752523SJarno Rajahalme } 10507f8a436eSJoe Stringer 10517f8a436eSJoe Stringer return 0; 10527f8a436eSJoe Stringer } 10537f8a436eSJoe Stringer 10547f8a436eSJoe Stringer /* Lookup connection and read fields into key. */ 10557f8a436eSJoe Stringer static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 10567f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 10577f8a436eSJoe Stringer struct sk_buff *skb) 10587f8a436eSJoe Stringer { 10597f8a436eSJoe Stringer struct nf_conntrack_expect *exp; 10607f8a436eSJoe Stringer 10619f13ded8SJarno Rajahalme /* If we pass an expected packet through nf_conntrack_in() the 10629f13ded8SJarno Rajahalme * expectation is typically removed, but the packet could still be 10639f13ded8SJarno Rajahalme * lost in upcall processing. To prevent this from happening we 10649f13ded8SJarno Rajahalme * perform an explicit expectation lookup. Expected connections are 10659f13ded8SJarno Rajahalme * always new, and will be passed through conntrack only when they are 10669f13ded8SJarno Rajahalme * committed, as it is OK to remove the expectation at that time. 10679f13ded8SJarno Rajahalme */ 10687f8a436eSJoe Stringer exp = ovs_ct_expect_find(net, &info->zone, info->family, skb); 10697f8a436eSJoe Stringer if (exp) { 10707f8a436eSJoe Stringer u8 state; 10717f8a436eSJoe Stringer 107205752523SJarno Rajahalme /* NOTE: New connections are NATted and Helped only when 107305752523SJarno Rajahalme * committed, so we are not calling into NAT here. 107405752523SJarno Rajahalme */ 10757f8a436eSJoe Stringer state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED; 1076182e3042SJoe Stringer __ovs_ct_update_key(key, state, &info->zone, exp->master); 1077d913d3a7SSamuel Gauthier } else { 1078d913d3a7SSamuel Gauthier struct nf_conn *ct; 1079d913d3a7SSamuel Gauthier int err; 1080d913d3a7SSamuel Gauthier 1081d913d3a7SSamuel Gauthier err = __ovs_ct_lookup(net, key, info, skb); 1082d913d3a7SSamuel Gauthier if (err) 1083d913d3a7SSamuel Gauthier return err; 1084d913d3a7SSamuel Gauthier 1085cb9c6836SFlorian Westphal ct = (struct nf_conn *)skb_nfct(skb); 1086d913d3a7SSamuel Gauthier if (ct) 1087d913d3a7SSamuel Gauthier nf_ct_deliver_cached_events(ct); 1088d913d3a7SSamuel Gauthier } 10897f8a436eSJoe Stringer 10907f8a436eSJoe Stringer return 0; 10917f8a436eSJoe Stringer } 10927f8a436eSJoe Stringer 109333db4125SJoe Stringer static bool labels_nonzero(const struct ovs_key_ct_labels *labels) 1094c2ac6673SJoe Stringer { 1095c2ac6673SJoe Stringer size_t i; 1096c2ac6673SJoe Stringer 1097cb80d58fSJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 1098cb80d58fSJarno Rajahalme if (labels->ct_labels_32[i]) 1099c2ac6673SJoe Stringer return true; 1100c2ac6673SJoe Stringer 1101c2ac6673SJoe Stringer return false; 1102c2ac6673SJoe Stringer } 1103c2ac6673SJoe Stringer 110411efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 110511efd5cbSYi-Hung Wei static struct hlist_head *ct_limit_hash_bucket( 110611efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info, u16 zone) 110711efd5cbSYi-Hung Wei { 110811efd5cbSYi-Hung Wei return &info->limits[zone & (CT_LIMIT_HASH_BUCKETS - 1)]; 110911efd5cbSYi-Hung Wei } 111011efd5cbSYi-Hung Wei 111111efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 111211efd5cbSYi-Hung Wei static void ct_limit_set(const struct ovs_ct_limit_info *info, 111311efd5cbSYi-Hung Wei struct ovs_ct_limit *new_ct_limit) 111411efd5cbSYi-Hung Wei { 111511efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 111611efd5cbSYi-Hung Wei struct hlist_head *head; 111711efd5cbSYi-Hung Wei 111811efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, new_ct_limit->zone); 111911efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 112011efd5cbSYi-Hung Wei if (ct_limit->zone == new_ct_limit->zone) { 112111efd5cbSYi-Hung Wei hlist_replace_rcu(&ct_limit->hlist_node, 112211efd5cbSYi-Hung Wei &new_ct_limit->hlist_node); 112311efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 112411efd5cbSYi-Hung Wei return; 112511efd5cbSYi-Hung Wei } 112611efd5cbSYi-Hung Wei } 112711efd5cbSYi-Hung Wei 112811efd5cbSYi-Hung Wei hlist_add_head_rcu(&new_ct_limit->hlist_node, head); 112911efd5cbSYi-Hung Wei } 113011efd5cbSYi-Hung Wei 113111efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 113211efd5cbSYi-Hung Wei static void ct_limit_del(const struct ovs_ct_limit_info *info, u16 zone) 113311efd5cbSYi-Hung Wei { 113411efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 113511efd5cbSYi-Hung Wei struct hlist_head *head; 113611efd5cbSYi-Hung Wei struct hlist_node *n; 113711efd5cbSYi-Hung Wei 113811efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, zone); 113911efd5cbSYi-Hung Wei hlist_for_each_entry_safe(ct_limit, n, head, hlist_node) { 114011efd5cbSYi-Hung Wei if (ct_limit->zone == zone) { 114111efd5cbSYi-Hung Wei hlist_del_rcu(&ct_limit->hlist_node); 114211efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 114311efd5cbSYi-Hung Wei return; 114411efd5cbSYi-Hung Wei } 114511efd5cbSYi-Hung Wei } 114611efd5cbSYi-Hung Wei } 114711efd5cbSYi-Hung Wei 114811efd5cbSYi-Hung Wei /* Call with RCU read lock */ 114911efd5cbSYi-Hung Wei static u32 ct_limit_get(const struct ovs_ct_limit_info *info, u16 zone) 115011efd5cbSYi-Hung Wei { 115111efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 115211efd5cbSYi-Hung Wei struct hlist_head *head; 115311efd5cbSYi-Hung Wei 115411efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, zone); 115511efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 115611efd5cbSYi-Hung Wei if (ct_limit->zone == zone) 115711efd5cbSYi-Hung Wei return ct_limit->limit; 115811efd5cbSYi-Hung Wei } 115911efd5cbSYi-Hung Wei 116011efd5cbSYi-Hung Wei return info->default_limit; 116111efd5cbSYi-Hung Wei } 116211efd5cbSYi-Hung Wei 116311efd5cbSYi-Hung Wei static int ovs_ct_check_limit(struct net *net, 116411efd5cbSYi-Hung Wei const struct ovs_conntrack_info *info, 116511efd5cbSYi-Hung Wei const struct nf_conntrack_tuple *tuple) 116611efd5cbSYi-Hung Wei { 116711efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 116811efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 116911efd5cbSYi-Hung Wei u32 per_zone_limit, connections; 117011efd5cbSYi-Hung Wei u32 conncount_key; 117111efd5cbSYi-Hung Wei 117211efd5cbSYi-Hung Wei conncount_key = info->zone.id; 117311efd5cbSYi-Hung Wei 117411efd5cbSYi-Hung Wei per_zone_limit = ct_limit_get(ct_limit_info, info->zone.id); 117511efd5cbSYi-Hung Wei if (per_zone_limit == OVS_CT_LIMIT_UNLIMITED) 117611efd5cbSYi-Hung Wei return 0; 117711efd5cbSYi-Hung Wei 117811efd5cbSYi-Hung Wei connections = nf_conncount_count(net, ct_limit_info->data, 117911efd5cbSYi-Hung Wei &conncount_key, tuple, &info->zone); 118011efd5cbSYi-Hung Wei if (connections > per_zone_limit) 118111efd5cbSYi-Hung Wei return -ENOMEM; 118211efd5cbSYi-Hung Wei 118311efd5cbSYi-Hung Wei return 0; 118411efd5cbSYi-Hung Wei } 118511efd5cbSYi-Hung Wei #endif 118611efd5cbSYi-Hung Wei 11877d904c7bSJarno Rajahalme /* Lookup connection and confirm if unconfirmed. */ 11887d904c7bSJarno Rajahalme static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, 11897d904c7bSJarno Rajahalme const struct ovs_conntrack_info *info, 11907d904c7bSJarno Rajahalme struct sk_buff *skb) 11917d904c7bSJarno Rajahalme { 11926ffcea79SJarno Rajahalme enum ip_conntrack_info ctinfo; 11936ffcea79SJarno Rajahalme struct nf_conn *ct; 11947d904c7bSJarno Rajahalme int err; 11957d904c7bSJarno Rajahalme 11967d904c7bSJarno Rajahalme err = __ovs_ct_lookup(net, key, info, skb); 11977d904c7bSJarno Rajahalme if (err) 11987d904c7bSJarno Rajahalme return err; 11997d904c7bSJarno Rajahalme 12006ffcea79SJarno Rajahalme /* The connection could be invalid, in which case this is a no-op.*/ 12016ffcea79SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 12026ffcea79SJarno Rajahalme if (!ct) 12036ffcea79SJarno Rajahalme return 0; 12046ffcea79SJarno Rajahalme 120511efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 120611efd5cbSYi-Hung Wei if (static_branch_unlikely(&ovs_ct_limit_enabled)) { 120711efd5cbSYi-Hung Wei if (!nf_ct_is_confirmed(ct)) { 120811efd5cbSYi-Hung Wei err = ovs_ct_check_limit(net, info, 120911efd5cbSYi-Hung Wei &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); 121011efd5cbSYi-Hung Wei if (err) { 121111efd5cbSYi-Hung Wei net_warn_ratelimited("openvswitch: zone: %u " 121243d0e960SColin Ian King "exceeds conntrack limit\n", 121311efd5cbSYi-Hung Wei info->zone.id); 121411efd5cbSYi-Hung Wei return err; 121511efd5cbSYi-Hung Wei } 121611efd5cbSYi-Hung Wei } 121711efd5cbSYi-Hung Wei } 121811efd5cbSYi-Hung Wei #endif 121911efd5cbSYi-Hung Wei 122012064551SJarno Rajahalme /* Set the conntrack event mask if given. NEW and DELETE events have 122112064551SJarno Rajahalme * their own groups, but the NFNLGRP_CONNTRACK_UPDATE group listener 122212064551SJarno Rajahalme * typically would receive many kinds of updates. Setting the event 122312064551SJarno Rajahalme * mask allows those events to be filtered. The set event mask will 122412064551SJarno Rajahalme * remain in effect for the lifetime of the connection unless changed 122512064551SJarno Rajahalme * by a further CT action with both the commit flag and the eventmask 122612064551SJarno Rajahalme * option. */ 122712064551SJarno Rajahalme if (info->have_eventmask) { 122812064551SJarno Rajahalme struct nf_conntrack_ecache *cache = nf_ct_ecache_find(ct); 122912064551SJarno Rajahalme 123012064551SJarno Rajahalme if (cache) 123112064551SJarno Rajahalme cache->ctmask = info->eventmask; 123212064551SJarno Rajahalme } 123312064551SJarno Rajahalme 12347d904c7bSJarno Rajahalme /* Apply changes before confirming the connection so that the initial 12357d904c7bSJarno Rajahalme * conntrack NEW netlink event carries the values given in the CT 12367d904c7bSJarno Rajahalme * action. 12377d904c7bSJarno Rajahalme */ 12387d904c7bSJarno Rajahalme if (info->mark.mask) { 12396ffcea79SJarno Rajahalme err = ovs_ct_set_mark(ct, key, info->mark.value, 12407d904c7bSJarno Rajahalme info->mark.mask); 12417d904c7bSJarno Rajahalme if (err) 12427d904c7bSJarno Rajahalme return err; 12437d904c7bSJarno Rajahalme } 124409aa98adSJarno Rajahalme if (!nf_ct_is_confirmed(ct)) { 12456ffcea79SJarno Rajahalme err = ovs_ct_init_labels(ct, key, &info->labels.value, 12466ffcea79SJarno Rajahalme &info->labels.mask); 124709aa98adSJarno Rajahalme if (err) 124809aa98adSJarno Rajahalme return err; 1249a277d516SArnd Bergmann } else if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1250a277d516SArnd Bergmann labels_nonzero(&info->labels.mask)) { 12516ffcea79SJarno Rajahalme err = ovs_ct_set_labels(ct, key, &info->labels.value, 12527d904c7bSJarno Rajahalme &info->labels.mask); 12537d904c7bSJarno Rajahalme if (err) 12547d904c7bSJarno Rajahalme return err; 12557d904c7bSJarno Rajahalme } 12567d904c7bSJarno Rajahalme /* This will take care of sending queued events even if the connection 12577d904c7bSJarno Rajahalme * is already confirmed. 12587d904c7bSJarno Rajahalme */ 12597d904c7bSJarno Rajahalme if (nf_conntrack_confirm(skb) != NF_ACCEPT) 12607d904c7bSJarno Rajahalme return -EINVAL; 12617d904c7bSJarno Rajahalme 12627d904c7bSJarno Rajahalme return 0; 12637d904c7bSJarno Rajahalme } 12647d904c7bSJarno Rajahalme 12659382fe71SEd Swierk /* Trim the skb to the length specified by the IP/IPv6 header, 12669382fe71SEd Swierk * removing any trailing lower-layer padding. This prepares the skb 12679382fe71SEd Swierk * for higher-layer processing that assumes skb->len excludes padding 12689382fe71SEd Swierk * (such as nf_ip_checksum). The caller needs to pull the skb to the 12699382fe71SEd Swierk * network header, and ensure ip_hdr/ipv6_hdr points to valid data. 12709382fe71SEd Swierk */ 12719382fe71SEd Swierk static int ovs_skb_network_trim(struct sk_buff *skb) 12729382fe71SEd Swierk { 12739382fe71SEd Swierk unsigned int len; 12749382fe71SEd Swierk int err; 12759382fe71SEd Swierk 12769382fe71SEd Swierk switch (skb->protocol) { 12779382fe71SEd Swierk case htons(ETH_P_IP): 12789382fe71SEd Swierk len = ntohs(ip_hdr(skb)->tot_len); 12799382fe71SEd Swierk break; 12809382fe71SEd Swierk case htons(ETH_P_IPV6): 12819382fe71SEd Swierk len = sizeof(struct ipv6hdr) 12829382fe71SEd Swierk + ntohs(ipv6_hdr(skb)->payload_len); 12839382fe71SEd Swierk break; 12849382fe71SEd Swierk default: 12859382fe71SEd Swierk len = skb->len; 12869382fe71SEd Swierk } 12879382fe71SEd Swierk 12889382fe71SEd Swierk err = pskb_trim_rcsum(skb, len); 12899382fe71SEd Swierk if (err) 12909382fe71SEd Swierk kfree_skb(skb); 12919382fe71SEd Swierk 12929382fe71SEd Swierk return err; 12939382fe71SEd Swierk } 12949382fe71SEd Swierk 129574c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 129674c16618SJoe Stringer * value if 'skb' is freed. 129774c16618SJoe Stringer */ 12987f8a436eSJoe Stringer int ovs_ct_execute(struct net *net, struct sk_buff *skb, 12997f8a436eSJoe Stringer struct sw_flow_key *key, 13007f8a436eSJoe Stringer const struct ovs_conntrack_info *info) 13017f8a436eSJoe Stringer { 13027f8a436eSJoe Stringer int nh_ofs; 13037f8a436eSJoe Stringer int err; 13047f8a436eSJoe Stringer 13057f8a436eSJoe Stringer /* The conntrack module expects to be working at L3. */ 13067f8a436eSJoe Stringer nh_ofs = skb_network_offset(skb); 130775f01a4cSLance Richardson skb_pull_rcsum(skb, nh_ofs); 13087f8a436eSJoe Stringer 13099382fe71SEd Swierk err = ovs_skb_network_trim(skb); 13109382fe71SEd Swierk if (err) 13119382fe71SEd Swierk return err; 13129382fe71SEd Swierk 13137f8a436eSJoe Stringer if (key->ip.frag != OVS_FRAG_TYPE_NONE) { 13147f8a436eSJoe Stringer err = handle_fragments(net, key, info->zone.id, skb); 13157f8a436eSJoe Stringer if (err) 13167f8a436eSJoe Stringer return err; 13177f8a436eSJoe Stringer } 13187f8a436eSJoe Stringer 1319ab38a7b5SJoe Stringer if (info->commit) 13207d904c7bSJarno Rajahalme err = ovs_ct_commit(net, key, info, skb); 13217f8a436eSJoe Stringer else 13227f8a436eSJoe Stringer err = ovs_ct_lookup(net, key, info, skb); 13237f8a436eSJoe Stringer 1324*7d42e84eSChristophe JAILLET skb_push_rcsum(skb, nh_ofs); 132574c16618SJoe Stringer if (err) 132674c16618SJoe Stringer kfree_skb(skb); 13277f8a436eSJoe Stringer return err; 13287f8a436eSJoe Stringer } 13297f8a436eSJoe Stringer 1330b8226962SEric Garver int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key) 1331b8226962SEric Garver { 1332b8226962SEric Garver if (skb_nfct(skb)) { 1333b8226962SEric Garver nf_conntrack_put(skb_nfct(skb)); 1334b8226962SEric Garver nf_ct_set(skb, NULL, IP_CT_UNTRACKED); 1335d29334c1Swenxu ovs_ct_fill_key(skb, key, false); 1336b8226962SEric Garver } 1337b8226962SEric Garver 1338b8226962SEric Garver return 0; 1339b8226962SEric Garver } 1340b8226962SEric Garver 1341cae3a262SJoe Stringer static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name, 1342cae3a262SJoe Stringer const struct sw_flow_key *key, bool log) 1343cae3a262SJoe Stringer { 1344cae3a262SJoe Stringer struct nf_conntrack_helper *helper; 1345cae3a262SJoe Stringer struct nf_conn_help *help; 1346fec9c271SFlavio Leitner int ret = 0; 1347cae3a262SJoe Stringer 1348cae3a262SJoe Stringer helper = nf_conntrack_helper_try_module_get(name, info->family, 1349cae3a262SJoe Stringer key->ip.proto); 1350cae3a262SJoe Stringer if (!helper) { 1351cae3a262SJoe Stringer OVS_NLERR(log, "Unknown helper \"%s\"", name); 1352cae3a262SJoe Stringer return -EINVAL; 1353cae3a262SJoe Stringer } 1354cae3a262SJoe Stringer 1355440534d3SGao Feng help = nf_ct_helper_ext_add(info->ct, GFP_KERNEL); 1356cae3a262SJoe Stringer if (!help) { 1357d91fc59cSLiping Zhang nf_conntrack_helper_put(helper); 1358cae3a262SJoe Stringer return -ENOMEM; 1359cae3a262SJoe Stringer } 1360cae3a262SJoe Stringer 1361f319ca65SGeert Uytterhoeven #if IS_ENABLED(CONFIG_NF_NAT) 1362fec9c271SFlavio Leitner if (info->nat) { 1363fec9c271SFlavio Leitner ret = nf_nat_helper_try_module_get(name, info->family, 1364fec9c271SFlavio Leitner key->ip.proto); 1365fec9c271SFlavio Leitner if (ret) { 1366fec9c271SFlavio Leitner nf_conntrack_helper_put(helper); 1367fec9c271SFlavio Leitner OVS_NLERR(log, "Failed to load \"%s\" NAT helper, error: %d", 1368fec9c271SFlavio Leitner name, ret); 1369fec9c271SFlavio Leitner return ret; 1370fec9c271SFlavio Leitner } 1371fec9c271SFlavio Leitner } 1372fec9c271SFlavio Leitner #endif 1373cae3a262SJoe Stringer rcu_assign_pointer(help->helper, helper); 1374cae3a262SJoe Stringer info->helper = helper; 1375fec9c271SFlavio Leitner return ret; 1376cae3a262SJoe Stringer } 1377cae3a262SJoe Stringer 13784806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 137905752523SJarno Rajahalme static int parse_nat(const struct nlattr *attr, 138005752523SJarno Rajahalme struct ovs_conntrack_info *info, bool log) 138105752523SJarno Rajahalme { 138205752523SJarno Rajahalme struct nlattr *a; 138305752523SJarno Rajahalme int rem; 138405752523SJarno Rajahalme bool have_ip_max = false; 138505752523SJarno Rajahalme bool have_proto_max = false; 138605752523SJarno Rajahalme bool ip_vers = (info->family == NFPROTO_IPV6); 138705752523SJarno Rajahalme 138805752523SJarno Rajahalme nla_for_each_nested(a, attr, rem) { 138905752523SJarno Rajahalme static const int ovs_nat_attr_lens[OVS_NAT_ATTR_MAX + 1][2] = { 139005752523SJarno Rajahalme [OVS_NAT_ATTR_SRC] = {0, 0}, 139105752523SJarno Rajahalme [OVS_NAT_ATTR_DST] = {0, 0}, 139205752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MIN] = {sizeof(struct in_addr), 139305752523SJarno Rajahalme sizeof(struct in6_addr)}, 139405752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MAX] = {sizeof(struct in_addr), 139505752523SJarno Rajahalme sizeof(struct in6_addr)}, 139605752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MIN] = {sizeof(u16), sizeof(u16)}, 139705752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MAX] = {sizeof(u16), sizeof(u16)}, 139805752523SJarno Rajahalme [OVS_NAT_ATTR_PERSISTENT] = {0, 0}, 139905752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_HASH] = {0, 0}, 140005752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_RANDOM] = {0, 0}, 140105752523SJarno Rajahalme }; 140205752523SJarno Rajahalme int type = nla_type(a); 140305752523SJarno Rajahalme 140405752523SJarno Rajahalme if (type > OVS_NAT_ATTR_MAX) { 14050ed80da5SJoe Perches OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)", 140605752523SJarno Rajahalme type, OVS_NAT_ATTR_MAX); 140705752523SJarno Rajahalme return -EINVAL; 140805752523SJarno Rajahalme } 140905752523SJarno Rajahalme 141005752523SJarno Rajahalme if (nla_len(a) != ovs_nat_attr_lens[type][ip_vers]) { 14110ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)", 141205752523SJarno Rajahalme type, nla_len(a), 141305752523SJarno Rajahalme ovs_nat_attr_lens[type][ip_vers]); 141405752523SJarno Rajahalme return -EINVAL; 141505752523SJarno Rajahalme } 141605752523SJarno Rajahalme 141705752523SJarno Rajahalme switch (type) { 141805752523SJarno Rajahalme case OVS_NAT_ATTR_SRC: 141905752523SJarno Rajahalme case OVS_NAT_ATTR_DST: 142005752523SJarno Rajahalme if (info->nat) { 14210ed80da5SJoe Perches OVS_NLERR(log, "Only one type of NAT may be specified"); 142205752523SJarno Rajahalme return -ERANGE; 142305752523SJarno Rajahalme } 142405752523SJarno Rajahalme info->nat |= OVS_CT_NAT; 142505752523SJarno Rajahalme info->nat |= ((type == OVS_NAT_ATTR_SRC) 142605752523SJarno Rajahalme ? OVS_CT_SRC_NAT : OVS_CT_DST_NAT); 142705752523SJarno Rajahalme break; 142805752523SJarno Rajahalme 142905752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MIN: 1430ac71b46eSHaishuang Yan nla_memcpy(&info->range.min_addr, a, 1431ac71b46eSHaishuang Yan sizeof(info->range.min_addr)); 143205752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 143305752523SJarno Rajahalme break; 143405752523SJarno Rajahalme 143505752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MAX: 143605752523SJarno Rajahalme have_ip_max = true; 143705752523SJarno Rajahalme nla_memcpy(&info->range.max_addr, a, 143805752523SJarno Rajahalme sizeof(info->range.max_addr)); 143905752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 144005752523SJarno Rajahalme break; 144105752523SJarno Rajahalme 144205752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MIN: 144305752523SJarno Rajahalme info->range.min_proto.all = htons(nla_get_u16(a)); 144405752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 144505752523SJarno Rajahalme break; 144605752523SJarno Rajahalme 144705752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MAX: 144805752523SJarno Rajahalme have_proto_max = true; 144905752523SJarno Rajahalme info->range.max_proto.all = htons(nla_get_u16(a)); 145005752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 145105752523SJarno Rajahalme break; 145205752523SJarno Rajahalme 145305752523SJarno Rajahalme case OVS_NAT_ATTR_PERSISTENT: 145405752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PERSISTENT; 145505752523SJarno Rajahalme break; 145605752523SJarno Rajahalme 145705752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_HASH: 145805752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM; 145905752523SJarno Rajahalme break; 146005752523SJarno Rajahalme 146105752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_RANDOM: 146205752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM_FULLY; 146305752523SJarno Rajahalme break; 146405752523SJarno Rajahalme 146505752523SJarno Rajahalme default: 14660ed80da5SJoe Perches OVS_NLERR(log, "Unknown nat attribute (%d)", type); 146705752523SJarno Rajahalme return -EINVAL; 146805752523SJarno Rajahalme } 146905752523SJarno Rajahalme } 147005752523SJarno Rajahalme 147105752523SJarno Rajahalme if (rem > 0) { 14720ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem); 147305752523SJarno Rajahalme return -EINVAL; 147405752523SJarno Rajahalme } 147505752523SJarno Rajahalme if (!info->nat) { 147605752523SJarno Rajahalme /* Do not allow flags if no type is given. */ 147705752523SJarno Rajahalme if (info->range.flags) { 147805752523SJarno Rajahalme OVS_NLERR(log, 1479e0b10844SJulia Lawall "NAT flags may be given only when NAT range (SRC or DST) is also specified." 148005752523SJarno Rajahalme ); 148105752523SJarno Rajahalme return -EINVAL; 148205752523SJarno Rajahalme } 148305752523SJarno Rajahalme info->nat = OVS_CT_NAT; /* NAT existing connections. */ 148405752523SJarno Rajahalme } else if (!info->commit) { 148505752523SJarno Rajahalme OVS_NLERR(log, 1486e0b10844SJulia Lawall "NAT attributes may be specified only when CT COMMIT flag is also specified." 148705752523SJarno Rajahalme ); 148805752523SJarno Rajahalme return -EINVAL; 148905752523SJarno Rajahalme } 149005752523SJarno Rajahalme /* Allow missing IP_MAX. */ 149105752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS && !have_ip_max) { 149205752523SJarno Rajahalme memcpy(&info->range.max_addr, &info->range.min_addr, 149305752523SJarno Rajahalme sizeof(info->range.max_addr)); 149405752523SJarno Rajahalme } 149505752523SJarno Rajahalme /* Allow missing PROTO_MAX. */ 149605752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 149705752523SJarno Rajahalme !have_proto_max) { 149805752523SJarno Rajahalme info->range.max_proto.all = info->range.min_proto.all; 149905752523SJarno Rajahalme } 150005752523SJarno Rajahalme return 0; 150105752523SJarno Rajahalme } 150205752523SJarno Rajahalme #endif 150305752523SJarno Rajahalme 15047f8a436eSJoe Stringer static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = { 1505ab38a7b5SJoe Stringer [OVS_CT_ATTR_COMMIT] = { .minlen = 0, .maxlen = 0 }, 1506dd41d33fSJarno Rajahalme [OVS_CT_ATTR_FORCE_COMMIT] = { .minlen = 0, .maxlen = 0 }, 15077f8a436eSJoe Stringer [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16), 15087f8a436eSJoe Stringer .maxlen = sizeof(u16) }, 1509182e3042SJoe Stringer [OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark), 1510182e3042SJoe Stringer .maxlen = sizeof(struct md_mark) }, 151133db4125SJoe Stringer [OVS_CT_ATTR_LABELS] = { .minlen = sizeof(struct md_labels), 151233db4125SJoe Stringer .maxlen = sizeof(struct md_labels) }, 1513cae3a262SJoe Stringer [OVS_CT_ATTR_HELPER] = { .minlen = 1, 151405752523SJarno Rajahalme .maxlen = NF_CT_HELPER_NAME_LEN }, 15154806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 151605752523SJarno Rajahalme /* NAT length is checked when parsing the nested attributes. */ 151705752523SJarno Rajahalme [OVS_CT_ATTR_NAT] = { .minlen = 0, .maxlen = INT_MAX }, 151805752523SJarno Rajahalme #endif 151912064551SJarno Rajahalme [OVS_CT_ATTR_EVENTMASK] = { .minlen = sizeof(u32), 152012064551SJarno Rajahalme .maxlen = sizeof(u32) }, 152106bd2bdfSYi-Hung Wei [OVS_CT_ATTR_TIMEOUT] = { .minlen = 1, 152206bd2bdfSYi-Hung Wei .maxlen = CTNL_TIMEOUT_NAME_MAX }, 15237f8a436eSJoe Stringer }; 15247f8a436eSJoe Stringer 15257f8a436eSJoe Stringer static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info, 1526cae3a262SJoe Stringer const char **helper, bool log) 15277f8a436eSJoe Stringer { 15287f8a436eSJoe Stringer struct nlattr *a; 15297f8a436eSJoe Stringer int rem; 15307f8a436eSJoe Stringer 15317f8a436eSJoe Stringer nla_for_each_nested(a, attr, rem) { 15327f8a436eSJoe Stringer int type = nla_type(a); 153369ec932eSLiping Zhang int maxlen; 153469ec932eSLiping Zhang int minlen; 15357f8a436eSJoe Stringer 15367f8a436eSJoe Stringer if (type > OVS_CT_ATTR_MAX) { 15377f8a436eSJoe Stringer OVS_NLERR(log, 15387f8a436eSJoe Stringer "Unknown conntrack attr (type=%d, max=%d)", 15397f8a436eSJoe Stringer type, OVS_CT_ATTR_MAX); 15407f8a436eSJoe Stringer return -EINVAL; 15417f8a436eSJoe Stringer } 154269ec932eSLiping Zhang 154369ec932eSLiping Zhang maxlen = ovs_ct_attr_lens[type].maxlen; 154469ec932eSLiping Zhang minlen = ovs_ct_attr_lens[type].minlen; 15457f8a436eSJoe Stringer if (nla_len(a) < minlen || nla_len(a) > maxlen) { 15467f8a436eSJoe Stringer OVS_NLERR(log, 15477f8a436eSJoe Stringer "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)", 15487f8a436eSJoe Stringer type, nla_len(a), maxlen); 15497f8a436eSJoe Stringer return -EINVAL; 15507f8a436eSJoe Stringer } 15517f8a436eSJoe Stringer 15527f8a436eSJoe Stringer switch (type) { 1553dd41d33fSJarno Rajahalme case OVS_CT_ATTR_FORCE_COMMIT: 1554dd41d33fSJarno Rajahalme info->force = true; 1555df561f66SGustavo A. R. Silva fallthrough; 1556ab38a7b5SJoe Stringer case OVS_CT_ATTR_COMMIT: 1557ab38a7b5SJoe Stringer info->commit = true; 15587f8a436eSJoe Stringer break; 15597f8a436eSJoe Stringer #ifdef CONFIG_NF_CONNTRACK_ZONES 15607f8a436eSJoe Stringer case OVS_CT_ATTR_ZONE: 15617f8a436eSJoe Stringer info->zone.id = nla_get_u16(a); 15627f8a436eSJoe Stringer break; 15637f8a436eSJoe Stringer #endif 1564182e3042SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_MARK 1565182e3042SJoe Stringer case OVS_CT_ATTR_MARK: { 1566182e3042SJoe Stringer struct md_mark *mark = nla_data(a); 1567182e3042SJoe Stringer 1568e754ec69SJoe Stringer if (!mark->mask) { 1569e754ec69SJoe Stringer OVS_NLERR(log, "ct_mark mask cannot be 0"); 1570e754ec69SJoe Stringer return -EINVAL; 1571e754ec69SJoe Stringer } 1572182e3042SJoe Stringer info->mark = *mark; 1573182e3042SJoe Stringer break; 1574182e3042SJoe Stringer } 1575182e3042SJoe Stringer #endif 1576c2ac6673SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_LABELS 157733db4125SJoe Stringer case OVS_CT_ATTR_LABELS: { 157833db4125SJoe Stringer struct md_labels *labels = nla_data(a); 1579c2ac6673SJoe Stringer 1580e754ec69SJoe Stringer if (!labels_nonzero(&labels->mask)) { 1581e754ec69SJoe Stringer OVS_NLERR(log, "ct_labels mask cannot be 0"); 1582e754ec69SJoe Stringer return -EINVAL; 1583e754ec69SJoe Stringer } 158433db4125SJoe Stringer info->labels = *labels; 1585c2ac6673SJoe Stringer break; 1586c2ac6673SJoe Stringer } 1587c2ac6673SJoe Stringer #endif 1588cae3a262SJoe Stringer case OVS_CT_ATTR_HELPER: 1589cae3a262SJoe Stringer *helper = nla_data(a); 1590cae3a262SJoe Stringer if (!memchr(*helper, '\0', nla_len(a))) { 1591cae3a262SJoe Stringer OVS_NLERR(log, "Invalid conntrack helper"); 1592cae3a262SJoe Stringer return -EINVAL; 1593cae3a262SJoe Stringer } 1594cae3a262SJoe Stringer break; 15954806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 159605752523SJarno Rajahalme case OVS_CT_ATTR_NAT: { 159705752523SJarno Rajahalme int err = parse_nat(a, info, log); 159805752523SJarno Rajahalme 159905752523SJarno Rajahalme if (err) 160005752523SJarno Rajahalme return err; 160105752523SJarno Rajahalme break; 160205752523SJarno Rajahalme } 160305752523SJarno Rajahalme #endif 160412064551SJarno Rajahalme case OVS_CT_ATTR_EVENTMASK: 160512064551SJarno Rajahalme info->have_eventmask = true; 160612064551SJarno Rajahalme info->eventmask = nla_get_u32(a); 160712064551SJarno Rajahalme break; 160806bd2bdfSYi-Hung Wei #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 160906bd2bdfSYi-Hung Wei case OVS_CT_ATTR_TIMEOUT: 161006bd2bdfSYi-Hung Wei memcpy(info->timeout, nla_data(a), nla_len(a)); 161106bd2bdfSYi-Hung Wei if (!memchr(info->timeout, '\0', nla_len(a))) { 161212c6bc38SYi-Hung Wei OVS_NLERR(log, "Invalid conntrack timeout"); 161306bd2bdfSYi-Hung Wei return -EINVAL; 161406bd2bdfSYi-Hung Wei } 161506bd2bdfSYi-Hung Wei break; 161606bd2bdfSYi-Hung Wei #endif 161712064551SJarno Rajahalme 16187f8a436eSJoe Stringer default: 16197f8a436eSJoe Stringer OVS_NLERR(log, "Unknown conntrack attr (%d)", 16207f8a436eSJoe Stringer type); 16217f8a436eSJoe Stringer return -EINVAL; 16227f8a436eSJoe Stringer } 16237f8a436eSJoe Stringer } 16247f8a436eSJoe Stringer 16257d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_MARK 16267d904c7bSJarno Rajahalme if (!info->commit && info->mark.mask) { 16277d904c7bSJarno Rajahalme OVS_NLERR(log, 16287d904c7bSJarno Rajahalme "Setting conntrack mark requires 'commit' flag."); 16297d904c7bSJarno Rajahalme return -EINVAL; 16307d904c7bSJarno Rajahalme } 16317d904c7bSJarno Rajahalme #endif 16327d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_LABELS 16337d904c7bSJarno Rajahalme if (!info->commit && labels_nonzero(&info->labels.mask)) { 16347d904c7bSJarno Rajahalme OVS_NLERR(log, 16357d904c7bSJarno Rajahalme "Setting conntrack labels requires 'commit' flag."); 16367d904c7bSJarno Rajahalme return -EINVAL; 16377d904c7bSJarno Rajahalme } 16387d904c7bSJarno Rajahalme #endif 16397f8a436eSJoe Stringer if (rem > 0) { 16407f8a436eSJoe Stringer OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem); 16417f8a436eSJoe Stringer return -EINVAL; 16427f8a436eSJoe Stringer } 16437f8a436eSJoe Stringer 16447f8a436eSJoe Stringer return 0; 16457f8a436eSJoe Stringer } 16467f8a436eSJoe Stringer 1647c2ac6673SJoe Stringer bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr) 16487f8a436eSJoe Stringer { 16497f8a436eSJoe Stringer if (attr == OVS_KEY_ATTR_CT_STATE) 16507f8a436eSJoe Stringer return true; 16517f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 16527f8a436eSJoe Stringer attr == OVS_KEY_ATTR_CT_ZONE) 16537f8a436eSJoe Stringer return true; 1654182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 1655182e3042SJoe Stringer attr == OVS_KEY_ATTR_CT_MARK) 1656182e3042SJoe Stringer return true; 1657c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 165833db4125SJoe Stringer attr == OVS_KEY_ATTR_CT_LABELS) { 1659c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 1660c2ac6673SJoe Stringer 1661c2ac6673SJoe Stringer return ovs_net->xt_label; 1662c2ac6673SJoe Stringer } 16637f8a436eSJoe Stringer 16647f8a436eSJoe Stringer return false; 16657f8a436eSJoe Stringer } 16667f8a436eSJoe Stringer 16677f8a436eSJoe Stringer int ovs_ct_copy_action(struct net *net, const struct nlattr *attr, 16687f8a436eSJoe Stringer const struct sw_flow_key *key, 16697f8a436eSJoe Stringer struct sw_flow_actions **sfa, bool log) 16707f8a436eSJoe Stringer { 16717f8a436eSJoe Stringer struct ovs_conntrack_info ct_info; 1672cae3a262SJoe Stringer const char *helper = NULL; 16737f8a436eSJoe Stringer u16 family; 16747f8a436eSJoe Stringer int err; 16757f8a436eSJoe Stringer 16767f8a436eSJoe Stringer family = key_to_nfproto(key); 16777f8a436eSJoe Stringer if (family == NFPROTO_UNSPEC) { 16787f8a436eSJoe Stringer OVS_NLERR(log, "ct family unspecified"); 16797f8a436eSJoe Stringer return -EINVAL; 16807f8a436eSJoe Stringer } 16817f8a436eSJoe Stringer 16827f8a436eSJoe Stringer memset(&ct_info, 0, sizeof(ct_info)); 16837f8a436eSJoe Stringer ct_info.family = family; 16847f8a436eSJoe Stringer 16857f8a436eSJoe Stringer nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID, 16867f8a436eSJoe Stringer NF_CT_DEFAULT_ZONE_DIR, 0); 16877f8a436eSJoe Stringer 1688cae3a262SJoe Stringer err = parse_ct(attr, &ct_info, &helper, log); 16897f8a436eSJoe Stringer if (err) 16907f8a436eSJoe Stringer return err; 16917f8a436eSJoe Stringer 16927f8a436eSJoe Stringer /* Set up template for tracking connections in specific zones. */ 16937f8a436eSJoe Stringer ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL); 16947f8a436eSJoe Stringer if (!ct_info.ct) { 16957f8a436eSJoe Stringer OVS_NLERR(log, "Failed to allocate conntrack template"); 16967f8a436eSJoe Stringer return -ENOMEM; 16977f8a436eSJoe Stringer } 169806bd2bdfSYi-Hung Wei 169906bd2bdfSYi-Hung Wei if (ct_info.timeout[0]) { 170006bd2bdfSYi-Hung Wei if (nf_ct_set_timeout(net, ct_info.ct, family, key->ip.proto, 170106bd2bdfSYi-Hung Wei ct_info.timeout)) 170206bd2bdfSYi-Hung Wei pr_info_ratelimited("Failed to associated timeout " 170306bd2bdfSYi-Hung Wei "policy `%s'\n", ct_info.timeout); 170471778951SYi-Hung Wei else 170571778951SYi-Hung Wei ct_info.nf_ct_timeout = rcu_dereference( 170671778951SYi-Hung Wei nf_ct_timeout_find(ct_info.ct)->timeout); 170771778951SYi-Hung Wei 170806bd2bdfSYi-Hung Wei } 170906bd2bdfSYi-Hung Wei 1710cae3a262SJoe Stringer if (helper) { 1711cae3a262SJoe Stringer err = ovs_ct_add_helper(&ct_info, helper, key, log); 1712cae3a262SJoe Stringer if (err) 1713cae3a262SJoe Stringer goto err_free_ct; 1714cae3a262SJoe Stringer } 17157f8a436eSJoe Stringer 17167f8a436eSJoe Stringer err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info, 17177f8a436eSJoe Stringer sizeof(ct_info), log); 17187f8a436eSJoe Stringer if (err) 17197f8a436eSJoe Stringer goto err_free_ct; 17207f8a436eSJoe Stringer 17217f6d6558SFlavio Leitner __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status); 17227f6d6558SFlavio Leitner nf_conntrack_get(&ct_info.ct->ct_general); 17237f8a436eSJoe Stringer return 0; 17247f8a436eSJoe Stringer err_free_ct: 17252f3ab9f9SJoe Stringer __ovs_ct_free_action(&ct_info); 17267f8a436eSJoe Stringer return err; 17277f8a436eSJoe Stringer } 17287f8a436eSJoe Stringer 17294806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 173005752523SJarno Rajahalme static bool ovs_ct_nat_to_attr(const struct ovs_conntrack_info *info, 173105752523SJarno Rajahalme struct sk_buff *skb) 173205752523SJarno Rajahalme { 173305752523SJarno Rajahalme struct nlattr *start; 173405752523SJarno Rajahalme 1735ae0be8deSMichal Kubecek start = nla_nest_start_noflag(skb, OVS_CT_ATTR_NAT); 173605752523SJarno Rajahalme if (!start) 173705752523SJarno Rajahalme return false; 173805752523SJarno Rajahalme 173905752523SJarno Rajahalme if (info->nat & OVS_CT_SRC_NAT) { 174005752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_SRC)) 174105752523SJarno Rajahalme return false; 174205752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 174305752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_DST)) 174405752523SJarno Rajahalme return false; 174505752523SJarno Rajahalme } else { 174605752523SJarno Rajahalme goto out; 174705752523SJarno Rajahalme } 174805752523SJarno Rajahalme 174905752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS) { 17503bf195aeSFlorian Westphal if (IS_ENABLED(CONFIG_NF_NAT) && 175199b7248eSArnd Bergmann info->family == NFPROTO_IPV4) { 175205752523SJarno Rajahalme if (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MIN, 175305752523SJarno Rajahalme info->range.min_addr.ip) || 175405752523SJarno Rajahalme (info->range.max_addr.ip 175505752523SJarno Rajahalme != info->range.min_addr.ip && 175605752523SJarno Rajahalme (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MAX, 175705752523SJarno Rajahalme info->range.max_addr.ip)))) 175805752523SJarno Rajahalme return false; 17593bf195aeSFlorian Westphal } else if (IS_ENABLED(CONFIG_IPV6) && 176099b7248eSArnd Bergmann info->family == NFPROTO_IPV6) { 176105752523SJarno Rajahalme if (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MIN, 176205752523SJarno Rajahalme &info->range.min_addr.in6) || 176305752523SJarno Rajahalme (memcmp(&info->range.max_addr.in6, 176405752523SJarno Rajahalme &info->range.min_addr.in6, 176505752523SJarno Rajahalme sizeof(info->range.max_addr.in6)) && 176605752523SJarno Rajahalme (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MAX, 176705752523SJarno Rajahalme &info->range.max_addr.in6)))) 176805752523SJarno Rajahalme return false; 176905752523SJarno Rajahalme } else { 177005752523SJarno Rajahalme return false; 177105752523SJarno Rajahalme } 177205752523SJarno Rajahalme } 177305752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 177405752523SJarno Rajahalme (nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MIN, 177505752523SJarno Rajahalme ntohs(info->range.min_proto.all)) || 177605752523SJarno Rajahalme (info->range.max_proto.all != info->range.min_proto.all && 177705752523SJarno Rajahalme nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MAX, 177805752523SJarno Rajahalme ntohs(info->range.max_proto.all))))) 177905752523SJarno Rajahalme return false; 178005752523SJarno Rajahalme 178105752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PERSISTENT && 178205752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PERSISTENT)) 178305752523SJarno Rajahalme return false; 178405752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM && 178505752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_HASH)) 178605752523SJarno Rajahalme return false; 178705752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY && 178805752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_RANDOM)) 178905752523SJarno Rajahalme return false; 179005752523SJarno Rajahalme out: 179105752523SJarno Rajahalme nla_nest_end(skb, start); 179205752523SJarno Rajahalme 179305752523SJarno Rajahalme return true; 179405752523SJarno Rajahalme } 179505752523SJarno Rajahalme #endif 179605752523SJarno Rajahalme 17977f8a436eSJoe Stringer int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info, 17987f8a436eSJoe Stringer struct sk_buff *skb) 17997f8a436eSJoe Stringer { 18007f8a436eSJoe Stringer struct nlattr *start; 18017f8a436eSJoe Stringer 1802ae0be8deSMichal Kubecek start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CT); 18037f8a436eSJoe Stringer if (!start) 18047f8a436eSJoe Stringer return -EMSGSIZE; 18057f8a436eSJoe Stringer 1806dd41d33fSJarno Rajahalme if (ct_info->commit && nla_put_flag(skb, ct_info->force 1807dd41d33fSJarno Rajahalme ? OVS_CT_ATTR_FORCE_COMMIT 1808dd41d33fSJarno Rajahalme : OVS_CT_ATTR_COMMIT)) 18097f8a436eSJoe Stringer return -EMSGSIZE; 18107f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 18117f8a436eSJoe Stringer nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id)) 18127f8a436eSJoe Stringer return -EMSGSIZE; 1813e754ec69SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && ct_info->mark.mask && 1814182e3042SJoe Stringer nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark), 1815182e3042SJoe Stringer &ct_info->mark)) 1816182e3042SJoe Stringer return -EMSGSIZE; 1817c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1818e754ec69SJoe Stringer labels_nonzero(&ct_info->labels.mask) && 181933db4125SJoe Stringer nla_put(skb, OVS_CT_ATTR_LABELS, sizeof(ct_info->labels), 182033db4125SJoe Stringer &ct_info->labels)) 1821c2ac6673SJoe Stringer return -EMSGSIZE; 1822cae3a262SJoe Stringer if (ct_info->helper) { 1823cae3a262SJoe Stringer if (nla_put_string(skb, OVS_CT_ATTR_HELPER, 1824cae3a262SJoe Stringer ct_info->helper->name)) 1825cae3a262SJoe Stringer return -EMSGSIZE; 1826cae3a262SJoe Stringer } 182712064551SJarno Rajahalme if (ct_info->have_eventmask && 182812064551SJarno Rajahalme nla_put_u32(skb, OVS_CT_ATTR_EVENTMASK, ct_info->eventmask)) 182912064551SJarno Rajahalme return -EMSGSIZE; 183006bd2bdfSYi-Hung Wei if (ct_info->timeout[0]) { 183106bd2bdfSYi-Hung Wei if (nla_put_string(skb, OVS_CT_ATTR_TIMEOUT, ct_info->timeout)) 183206bd2bdfSYi-Hung Wei return -EMSGSIZE; 183306bd2bdfSYi-Hung Wei } 183412064551SJarno Rajahalme 18354806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 183605752523SJarno Rajahalme if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb)) 183705752523SJarno Rajahalme return -EMSGSIZE; 183805752523SJarno Rajahalme #endif 18397f8a436eSJoe Stringer nla_nest_end(skb, start); 18407f8a436eSJoe Stringer 18417f8a436eSJoe Stringer return 0; 18427f8a436eSJoe Stringer } 18437f8a436eSJoe Stringer 18447f8a436eSJoe Stringer void ovs_ct_free_action(const struct nlattr *a) 18457f8a436eSJoe Stringer { 18467f8a436eSJoe Stringer struct ovs_conntrack_info *ct_info = nla_data(a); 18477f8a436eSJoe Stringer 18482f3ab9f9SJoe Stringer __ovs_ct_free_action(ct_info); 18492f3ab9f9SJoe Stringer } 18502f3ab9f9SJoe Stringer 18512f3ab9f9SJoe Stringer static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info) 18522f3ab9f9SJoe Stringer { 1853fec9c271SFlavio Leitner if (ct_info->helper) { 1854f319ca65SGeert Uytterhoeven #if IS_ENABLED(CONFIG_NF_NAT) 1855fec9c271SFlavio Leitner if (ct_info->nat) 1856fec9c271SFlavio Leitner nf_nat_helper_put(ct_info->helper); 1857fec9c271SFlavio Leitner #endif 1858d91fc59cSLiping Zhang nf_conntrack_helper_put(ct_info->helper); 1859fec9c271SFlavio Leitner } 186006bd2bdfSYi-Hung Wei if (ct_info->ct) { 186106bd2bdfSYi-Hung Wei if (ct_info->timeout[0]) 186206bd2bdfSYi-Hung Wei nf_ct_destroy_timeout(ct_info->ct); 18636d670497SDan Carpenter nf_ct_tmpl_free(ct_info->ct); 186406bd2bdfSYi-Hung Wei } 18657f8a436eSJoe Stringer } 1866c2ac6673SJoe Stringer 186711efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 186811efd5cbSYi-Hung Wei static int ovs_ct_limit_init(struct net *net, struct ovs_net *ovs_net) 186911efd5cbSYi-Hung Wei { 187011efd5cbSYi-Hung Wei int i, err; 187111efd5cbSYi-Hung Wei 187211efd5cbSYi-Hung Wei ovs_net->ct_limit_info = kmalloc(sizeof(*ovs_net->ct_limit_info), 187311efd5cbSYi-Hung Wei GFP_KERNEL); 187411efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info) 187511efd5cbSYi-Hung Wei return -ENOMEM; 187611efd5cbSYi-Hung Wei 187711efd5cbSYi-Hung Wei ovs_net->ct_limit_info->default_limit = OVS_CT_LIMIT_DEFAULT; 187811efd5cbSYi-Hung Wei ovs_net->ct_limit_info->limits = 187911efd5cbSYi-Hung Wei kmalloc_array(CT_LIMIT_HASH_BUCKETS, sizeof(struct hlist_head), 188011efd5cbSYi-Hung Wei GFP_KERNEL); 188111efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info->limits) { 188211efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 188311efd5cbSYi-Hung Wei return -ENOMEM; 188411efd5cbSYi-Hung Wei } 188511efd5cbSYi-Hung Wei 188611efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; i++) 188711efd5cbSYi-Hung Wei INIT_HLIST_HEAD(&ovs_net->ct_limit_info->limits[i]); 188811efd5cbSYi-Hung Wei 188911efd5cbSYi-Hung Wei ovs_net->ct_limit_info->data = 189011efd5cbSYi-Hung Wei nf_conncount_init(net, NFPROTO_INET, sizeof(u32)); 189111efd5cbSYi-Hung Wei 189211efd5cbSYi-Hung Wei if (IS_ERR(ovs_net->ct_limit_info->data)) { 189311efd5cbSYi-Hung Wei err = PTR_ERR(ovs_net->ct_limit_info->data); 189411efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info->limits); 189511efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 189611efd5cbSYi-Hung Wei pr_err("openvswitch: failed to init nf_conncount %d\n", err); 189711efd5cbSYi-Hung Wei return err; 189811efd5cbSYi-Hung Wei } 189911efd5cbSYi-Hung Wei return 0; 190011efd5cbSYi-Hung Wei } 190111efd5cbSYi-Hung Wei 190211efd5cbSYi-Hung Wei static void ovs_ct_limit_exit(struct net *net, struct ovs_net *ovs_net) 190311efd5cbSYi-Hung Wei { 190411efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info = ovs_net->ct_limit_info; 190511efd5cbSYi-Hung Wei int i; 190611efd5cbSYi-Hung Wei 190711efd5cbSYi-Hung Wei nf_conncount_destroy(net, NFPROTO_INET, info->data); 190811efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 190911efd5cbSYi-Hung Wei struct hlist_head *head = &info->limits[i]; 191011efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 191111efd5cbSYi-Hung Wei 191227de77ceSTonghao Zhang hlist_for_each_entry_rcu(ct_limit, head, hlist_node, 191327de77ceSTonghao Zhang lockdep_ovsl_is_held()) 191411efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 191511efd5cbSYi-Hung Wei } 19167b066d17SZeng Tao kfree(info->limits); 19177b066d17SZeng Tao kfree(info); 191811efd5cbSYi-Hung Wei } 191911efd5cbSYi-Hung Wei 192011efd5cbSYi-Hung Wei static struct sk_buff * 192111efd5cbSYi-Hung Wei ovs_ct_limit_cmd_reply_start(struct genl_info *info, u8 cmd, 192211efd5cbSYi-Hung Wei struct ovs_header **ovs_reply_header) 192311efd5cbSYi-Hung Wei { 192411efd5cbSYi-Hung Wei struct ovs_header *ovs_header = info->userhdr; 192511efd5cbSYi-Hung Wei struct sk_buff *skb; 192611efd5cbSYi-Hung Wei 192711efd5cbSYi-Hung Wei skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 192811efd5cbSYi-Hung Wei if (!skb) 192911efd5cbSYi-Hung Wei return ERR_PTR(-ENOMEM); 193011efd5cbSYi-Hung Wei 193111efd5cbSYi-Hung Wei *ovs_reply_header = genlmsg_put(skb, info->snd_portid, 193211efd5cbSYi-Hung Wei info->snd_seq, 193311efd5cbSYi-Hung Wei &dp_ct_limit_genl_family, 0, cmd); 193411efd5cbSYi-Hung Wei 193511efd5cbSYi-Hung Wei if (!*ovs_reply_header) { 193611efd5cbSYi-Hung Wei nlmsg_free(skb); 193711efd5cbSYi-Hung Wei return ERR_PTR(-EMSGSIZE); 193811efd5cbSYi-Hung Wei } 193911efd5cbSYi-Hung Wei (*ovs_reply_header)->dp_ifindex = ovs_header->dp_ifindex; 194011efd5cbSYi-Hung Wei 194111efd5cbSYi-Hung Wei return skb; 194211efd5cbSYi-Hung Wei } 194311efd5cbSYi-Hung Wei 194411efd5cbSYi-Hung Wei static bool check_zone_id(int zone_id, u16 *pzone) 194511efd5cbSYi-Hung Wei { 194611efd5cbSYi-Hung Wei if (zone_id >= 0 && zone_id <= 65535) { 194711efd5cbSYi-Hung Wei *pzone = (u16)zone_id; 194811efd5cbSYi-Hung Wei return true; 194911efd5cbSYi-Hung Wei } 195011efd5cbSYi-Hung Wei return false; 195111efd5cbSYi-Hung Wei } 195211efd5cbSYi-Hung Wei 195311efd5cbSYi-Hung Wei static int ovs_ct_limit_set_zone_limit(struct nlattr *nla_zone_limit, 195411efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 195511efd5cbSYi-Hung Wei { 195611efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 195711efd5cbSYi-Hung Wei int rem; 195811efd5cbSYi-Hung Wei u16 zone; 195911efd5cbSYi-Hung Wei 196011efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 196111efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 196211efd5cbSYi-Hung Wei 196311efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 196411efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 196511efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 196611efd5cbSYi-Hung Wei ovs_lock(); 196711efd5cbSYi-Hung Wei info->default_limit = zone_limit->limit; 196811efd5cbSYi-Hung Wei ovs_unlock(); 196911efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 197011efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 197111efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 197211efd5cbSYi-Hung Wei } else { 197311efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 197411efd5cbSYi-Hung Wei 197511efd5cbSYi-Hung Wei ct_limit = kmalloc(sizeof(*ct_limit), GFP_KERNEL); 197611efd5cbSYi-Hung Wei if (!ct_limit) 197711efd5cbSYi-Hung Wei return -ENOMEM; 197811efd5cbSYi-Hung Wei 197911efd5cbSYi-Hung Wei ct_limit->zone = zone; 198011efd5cbSYi-Hung Wei ct_limit->limit = zone_limit->limit; 198111efd5cbSYi-Hung Wei 198211efd5cbSYi-Hung Wei ovs_lock(); 198311efd5cbSYi-Hung Wei ct_limit_set(info, ct_limit); 198411efd5cbSYi-Hung Wei ovs_unlock(); 198511efd5cbSYi-Hung Wei } 198611efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 198711efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 198811efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 198911efd5cbSYi-Hung Wei } 199011efd5cbSYi-Hung Wei 199111efd5cbSYi-Hung Wei if (rem) 199211efd5cbSYi-Hung Wei OVS_NLERR(true, "set zone limit has %d unknown bytes", rem); 199311efd5cbSYi-Hung Wei 199411efd5cbSYi-Hung Wei return 0; 199511efd5cbSYi-Hung Wei } 199611efd5cbSYi-Hung Wei 199711efd5cbSYi-Hung Wei static int ovs_ct_limit_del_zone_limit(struct nlattr *nla_zone_limit, 199811efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 199911efd5cbSYi-Hung Wei { 200011efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 200111efd5cbSYi-Hung Wei int rem; 200211efd5cbSYi-Hung Wei u16 zone; 200311efd5cbSYi-Hung Wei 200411efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 200511efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 200611efd5cbSYi-Hung Wei 200711efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 200811efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 200911efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 201011efd5cbSYi-Hung Wei ovs_lock(); 201111efd5cbSYi-Hung Wei info->default_limit = OVS_CT_LIMIT_DEFAULT; 201211efd5cbSYi-Hung Wei ovs_unlock(); 201311efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 201411efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 201511efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 201611efd5cbSYi-Hung Wei } else { 201711efd5cbSYi-Hung Wei ovs_lock(); 201811efd5cbSYi-Hung Wei ct_limit_del(info, zone); 201911efd5cbSYi-Hung Wei ovs_unlock(); 202011efd5cbSYi-Hung Wei } 202111efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 202211efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 202311efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 202411efd5cbSYi-Hung Wei } 202511efd5cbSYi-Hung Wei 202611efd5cbSYi-Hung Wei if (rem) 202711efd5cbSYi-Hung Wei OVS_NLERR(true, "del zone limit has %d unknown bytes", rem); 202811efd5cbSYi-Hung Wei 202911efd5cbSYi-Hung Wei return 0; 203011efd5cbSYi-Hung Wei } 203111efd5cbSYi-Hung Wei 203211efd5cbSYi-Hung Wei static int ovs_ct_limit_get_default_limit(struct ovs_ct_limit_info *info, 203311efd5cbSYi-Hung Wei struct sk_buff *reply) 203411efd5cbSYi-Hung Wei { 203511efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 203611efd5cbSYi-Hung Wei 203711efd5cbSYi-Hung Wei zone_limit.zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE; 203811efd5cbSYi-Hung Wei zone_limit.limit = info->default_limit; 203911efd5cbSYi-Hung Wei 20405e359044SZheng Yongjun return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 204111efd5cbSYi-Hung Wei } 204211efd5cbSYi-Hung Wei 204311efd5cbSYi-Hung Wei static int __ovs_ct_limit_get_zone_limit(struct net *net, 204411efd5cbSYi-Hung Wei struct nf_conncount_data *data, 204511efd5cbSYi-Hung Wei u16 zone_id, u32 limit, 204611efd5cbSYi-Hung Wei struct sk_buff *reply) 204711efd5cbSYi-Hung Wei { 204811efd5cbSYi-Hung Wei struct nf_conntrack_zone ct_zone; 204911efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 205011efd5cbSYi-Hung Wei u32 conncount_key = zone_id; 205111efd5cbSYi-Hung Wei 205211efd5cbSYi-Hung Wei zone_limit.zone_id = zone_id; 205311efd5cbSYi-Hung Wei zone_limit.limit = limit; 205411efd5cbSYi-Hung Wei nf_ct_zone_init(&ct_zone, zone_id, NF_CT_DEFAULT_ZONE_DIR, 0); 205511efd5cbSYi-Hung Wei 205611efd5cbSYi-Hung Wei zone_limit.count = nf_conncount_count(net, data, &conncount_key, NULL, 205711efd5cbSYi-Hung Wei &ct_zone); 205811efd5cbSYi-Hung Wei return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 205911efd5cbSYi-Hung Wei } 206011efd5cbSYi-Hung Wei 206111efd5cbSYi-Hung Wei static int ovs_ct_limit_get_zone_limit(struct net *net, 206211efd5cbSYi-Hung Wei struct nlattr *nla_zone_limit, 206311efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 206411efd5cbSYi-Hung Wei struct sk_buff *reply) 206511efd5cbSYi-Hung Wei { 206611efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 206711efd5cbSYi-Hung Wei int rem, err; 206811efd5cbSYi-Hung Wei u32 limit; 206911efd5cbSYi-Hung Wei u16 zone; 207011efd5cbSYi-Hung Wei 207111efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 207211efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 207311efd5cbSYi-Hung Wei 207411efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 207511efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 207611efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 207711efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 207811efd5cbSYi-Hung Wei if (err) 207911efd5cbSYi-Hung Wei return err; 208011efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id(zone_limit->zone_id, 208111efd5cbSYi-Hung Wei &zone))) { 208211efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 208311efd5cbSYi-Hung Wei } else { 208411efd5cbSYi-Hung Wei rcu_read_lock(); 208511efd5cbSYi-Hung Wei limit = ct_limit_get(info, zone); 208611efd5cbSYi-Hung Wei rcu_read_unlock(); 208711efd5cbSYi-Hung Wei 208811efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit( 208911efd5cbSYi-Hung Wei net, info->data, zone, limit, reply); 209011efd5cbSYi-Hung Wei if (err) 209111efd5cbSYi-Hung Wei return err; 209211efd5cbSYi-Hung Wei } 209311efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 209411efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 209511efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 209611efd5cbSYi-Hung Wei } 209711efd5cbSYi-Hung Wei 209811efd5cbSYi-Hung Wei if (rem) 209911efd5cbSYi-Hung Wei OVS_NLERR(true, "get zone limit has %d unknown bytes", rem); 210011efd5cbSYi-Hung Wei 210111efd5cbSYi-Hung Wei return 0; 210211efd5cbSYi-Hung Wei } 210311efd5cbSYi-Hung Wei 210411efd5cbSYi-Hung Wei static int ovs_ct_limit_get_all_zone_limit(struct net *net, 210511efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 210611efd5cbSYi-Hung Wei struct sk_buff *reply) 210711efd5cbSYi-Hung Wei { 210811efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 210911efd5cbSYi-Hung Wei struct hlist_head *head; 211011efd5cbSYi-Hung Wei int i, err = 0; 211111efd5cbSYi-Hung Wei 211211efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 211311efd5cbSYi-Hung Wei if (err) 211411efd5cbSYi-Hung Wei return err; 211511efd5cbSYi-Hung Wei 211611efd5cbSYi-Hung Wei rcu_read_lock(); 211711efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 211811efd5cbSYi-Hung Wei head = &info->limits[i]; 211911efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 212011efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit(net, info->data, 212111efd5cbSYi-Hung Wei ct_limit->zone, ct_limit->limit, reply); 212211efd5cbSYi-Hung Wei if (err) 212311efd5cbSYi-Hung Wei goto exit_err; 212411efd5cbSYi-Hung Wei } 212511efd5cbSYi-Hung Wei } 212611efd5cbSYi-Hung Wei 212711efd5cbSYi-Hung Wei exit_err: 212811efd5cbSYi-Hung Wei rcu_read_unlock(); 212911efd5cbSYi-Hung Wei return err; 213011efd5cbSYi-Hung Wei } 213111efd5cbSYi-Hung Wei 213211efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_set(struct sk_buff *skb, struct genl_info *info) 213311efd5cbSYi-Hung Wei { 213411efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 213511efd5cbSYi-Hung Wei struct sk_buff *reply; 213611efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 213711efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 213811efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 213911efd5cbSYi-Hung Wei int err; 214011efd5cbSYi-Hung Wei 214111efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_SET, 214211efd5cbSYi-Hung Wei &ovs_reply_header); 214311efd5cbSYi-Hung Wei if (IS_ERR(reply)) 214411efd5cbSYi-Hung Wei return PTR_ERR(reply); 214511efd5cbSYi-Hung Wei 214611efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 214711efd5cbSYi-Hung Wei err = -EINVAL; 214811efd5cbSYi-Hung Wei goto exit_err; 214911efd5cbSYi-Hung Wei } 215011efd5cbSYi-Hung Wei 215111efd5cbSYi-Hung Wei err = ovs_ct_limit_set_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 215211efd5cbSYi-Hung Wei ct_limit_info); 215311efd5cbSYi-Hung Wei if (err) 215411efd5cbSYi-Hung Wei goto exit_err; 215511efd5cbSYi-Hung Wei 215611efd5cbSYi-Hung Wei static_branch_enable(&ovs_ct_limit_enabled); 215711efd5cbSYi-Hung Wei 215811efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 215911efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 216011efd5cbSYi-Hung Wei 216111efd5cbSYi-Hung Wei exit_err: 216211efd5cbSYi-Hung Wei nlmsg_free(reply); 216311efd5cbSYi-Hung Wei return err; 216411efd5cbSYi-Hung Wei } 216511efd5cbSYi-Hung Wei 216611efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_del(struct sk_buff *skb, struct genl_info *info) 216711efd5cbSYi-Hung Wei { 216811efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 216911efd5cbSYi-Hung Wei struct sk_buff *reply; 217011efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 217111efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 217211efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 217311efd5cbSYi-Hung Wei int err; 217411efd5cbSYi-Hung Wei 217511efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_DEL, 217611efd5cbSYi-Hung Wei &ovs_reply_header); 217711efd5cbSYi-Hung Wei if (IS_ERR(reply)) 217811efd5cbSYi-Hung Wei return PTR_ERR(reply); 217911efd5cbSYi-Hung Wei 218011efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 218111efd5cbSYi-Hung Wei err = -EINVAL; 218211efd5cbSYi-Hung Wei goto exit_err; 218311efd5cbSYi-Hung Wei } 218411efd5cbSYi-Hung Wei 218511efd5cbSYi-Hung Wei err = ovs_ct_limit_del_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 218611efd5cbSYi-Hung Wei ct_limit_info); 218711efd5cbSYi-Hung Wei if (err) 218811efd5cbSYi-Hung Wei goto exit_err; 218911efd5cbSYi-Hung Wei 219011efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 219111efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 219211efd5cbSYi-Hung Wei 219311efd5cbSYi-Hung Wei exit_err: 219411efd5cbSYi-Hung Wei nlmsg_free(reply); 219511efd5cbSYi-Hung Wei return err; 219611efd5cbSYi-Hung Wei } 219711efd5cbSYi-Hung Wei 219811efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_get(struct sk_buff *skb, struct genl_info *info) 219911efd5cbSYi-Hung Wei { 220011efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 220111efd5cbSYi-Hung Wei struct nlattr *nla_reply; 220211efd5cbSYi-Hung Wei struct sk_buff *reply; 220311efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 220411efd5cbSYi-Hung Wei struct net *net = sock_net(skb->sk); 220511efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 220611efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 220711efd5cbSYi-Hung Wei int err; 220811efd5cbSYi-Hung Wei 220911efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_GET, 221011efd5cbSYi-Hung Wei &ovs_reply_header); 221111efd5cbSYi-Hung Wei if (IS_ERR(reply)) 221211efd5cbSYi-Hung Wei return PTR_ERR(reply); 221311efd5cbSYi-Hung Wei 2214ae0be8deSMichal Kubecek nla_reply = nla_nest_start_noflag(reply, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); 2215ca965346SColin Ian King if (!nla_reply) { 2216ca965346SColin Ian King err = -EMSGSIZE; 2217ca965346SColin Ian King goto exit_err; 2218ca965346SColin Ian King } 221911efd5cbSYi-Hung Wei 222011efd5cbSYi-Hung Wei if (a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 222111efd5cbSYi-Hung Wei err = ovs_ct_limit_get_zone_limit( 222211efd5cbSYi-Hung Wei net, a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], ct_limit_info, 222311efd5cbSYi-Hung Wei reply); 222411efd5cbSYi-Hung Wei if (err) 222511efd5cbSYi-Hung Wei goto exit_err; 222611efd5cbSYi-Hung Wei } else { 222711efd5cbSYi-Hung Wei err = ovs_ct_limit_get_all_zone_limit(net, ct_limit_info, 222811efd5cbSYi-Hung Wei reply); 222911efd5cbSYi-Hung Wei if (err) 223011efd5cbSYi-Hung Wei goto exit_err; 223111efd5cbSYi-Hung Wei } 223211efd5cbSYi-Hung Wei 223311efd5cbSYi-Hung Wei nla_nest_end(reply, nla_reply); 223411efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 223511efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 223611efd5cbSYi-Hung Wei 223711efd5cbSYi-Hung Wei exit_err: 223811efd5cbSYi-Hung Wei nlmsg_free(reply); 223911efd5cbSYi-Hung Wei return err; 224011efd5cbSYi-Hung Wei } 224111efd5cbSYi-Hung Wei 2242b980b313SRikard Falkeborn static const struct genl_small_ops ct_limit_genl_ops[] = { 224311efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_SET, 2244ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 224511efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 224611efd5cbSYi-Hung Wei * privilege. */ 224711efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_set, 224811efd5cbSYi-Hung Wei }, 224911efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_DEL, 2250ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 225111efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 225211efd5cbSYi-Hung Wei * privilege. */ 225311efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_del, 225411efd5cbSYi-Hung Wei }, 225511efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_GET, 2256ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 225711efd5cbSYi-Hung Wei .flags = 0, /* OK for unprivileged users. */ 225811efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_get, 225911efd5cbSYi-Hung Wei }, 226011efd5cbSYi-Hung Wei }; 226111efd5cbSYi-Hung Wei 226211efd5cbSYi-Hung Wei static const struct genl_multicast_group ovs_ct_limit_multicast_group = { 226311efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_MCGROUP, 226411efd5cbSYi-Hung Wei }; 226511efd5cbSYi-Hung Wei 226611efd5cbSYi-Hung Wei struct genl_family dp_ct_limit_genl_family __ro_after_init = { 226711efd5cbSYi-Hung Wei .hdrsize = sizeof(struct ovs_header), 226811efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_FAMILY, 226911efd5cbSYi-Hung Wei .version = OVS_CT_LIMIT_VERSION, 227011efd5cbSYi-Hung Wei .maxattr = OVS_CT_LIMIT_ATTR_MAX, 22713b0f31f2SJohannes Berg .policy = ct_limit_policy, 227211efd5cbSYi-Hung Wei .netnsok = true, 227311efd5cbSYi-Hung Wei .parallel_ops = true, 227466a9b928SJakub Kicinski .small_ops = ct_limit_genl_ops, 227566a9b928SJakub Kicinski .n_small_ops = ARRAY_SIZE(ct_limit_genl_ops), 227611efd5cbSYi-Hung Wei .mcgrps = &ovs_ct_limit_multicast_group, 227711efd5cbSYi-Hung Wei .n_mcgrps = 1, 227811efd5cbSYi-Hung Wei .module = THIS_MODULE, 227911efd5cbSYi-Hung Wei }; 228011efd5cbSYi-Hung Wei #endif 228111efd5cbSYi-Hung Wei 228211efd5cbSYi-Hung Wei int ovs_ct_init(struct net *net) 2283c2ac6673SJoe Stringer { 228433db4125SJoe Stringer unsigned int n_bits = sizeof(struct ovs_key_ct_labels) * BITS_PER_BYTE; 2285c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2286c2ac6673SJoe Stringer 2287adff6c65SFlorian Westphal if (nf_connlabels_get(net, n_bits - 1)) { 2288c2ac6673SJoe Stringer ovs_net->xt_label = false; 2289c2ac6673SJoe Stringer OVS_NLERR(true, "Failed to set connlabel length"); 2290c2ac6673SJoe Stringer } else { 2291c2ac6673SJoe Stringer ovs_net->xt_label = true; 2292c2ac6673SJoe Stringer } 229311efd5cbSYi-Hung Wei 229411efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 229511efd5cbSYi-Hung Wei return ovs_ct_limit_init(net, ovs_net); 229611efd5cbSYi-Hung Wei #else 229711efd5cbSYi-Hung Wei return 0; 229811efd5cbSYi-Hung Wei #endif 2299c2ac6673SJoe Stringer } 2300c2ac6673SJoe Stringer 2301c2ac6673SJoe Stringer void ovs_ct_exit(struct net *net) 2302c2ac6673SJoe Stringer { 2303c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2304c2ac6673SJoe Stringer 230511efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 230611efd5cbSYi-Hung Wei ovs_ct_limit_exit(net, ovs_net); 230711efd5cbSYi-Hung Wei #endif 230811efd5cbSYi-Hung Wei 2309c2ac6673SJoe Stringer if (ovs_net->xt_label) 2310c2ac6673SJoe Stringer nf_connlabels_put(net); 2311c2ac6673SJoe Stringer } 2312