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 */ 2747f8a436eSJoe Stringer void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key) 2757f8a436eSJoe Stringer { 27605752523SJarno Rajahalme ovs_ct_update_key(skb, NULL, key, false, false); 2777f8a436eSJoe Stringer } 2787f8a436eSJoe Stringer 2799dd7f890SJarno Rajahalme #define IN6_ADDR_INITIALIZER(ADDR) \ 2809dd7f890SJarno Rajahalme { (ADDR).s6_addr32[0], (ADDR).s6_addr32[1], \ 2819dd7f890SJarno Rajahalme (ADDR).s6_addr32[2], (ADDR).s6_addr32[3] } 2829dd7f890SJarno Rajahalme 2839dd7f890SJarno Rajahalme int ovs_ct_put_key(const struct sw_flow_key *swkey, 2849dd7f890SJarno Rajahalme const struct sw_flow_key *output, struct sk_buff *skb) 2857f8a436eSJoe Stringer { 286316d4d78SJarno Rajahalme if (nla_put_u32(skb, OVS_KEY_ATTR_CT_STATE, output->ct_state)) 2877f8a436eSJoe Stringer return -EMSGSIZE; 2887f8a436eSJoe Stringer 2897f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 290316d4d78SJarno Rajahalme nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, output->ct_zone)) 2917f8a436eSJoe Stringer return -EMSGSIZE; 2927f8a436eSJoe Stringer 293182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2949dd7f890SJarno Rajahalme nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, output->ct.mark)) 295182e3042SJoe Stringer return -EMSGSIZE; 296182e3042SJoe Stringer 2979723e6abSValentin Rothberg if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2989dd7f890SJarno Rajahalme nla_put(skb, OVS_KEY_ATTR_CT_LABELS, sizeof(output->ct.labels), 2999dd7f890SJarno Rajahalme &output->ct.labels)) 300c2ac6673SJoe Stringer return -EMSGSIZE; 301c2ac6673SJoe Stringer 302316d4d78SJarno Rajahalme if (swkey->ct_orig_proto) { 3039dd7f890SJarno Rajahalme if (swkey->eth.type == htons(ETH_P_IP)) { 3049dd7f890SJarno Rajahalme struct ovs_key_ct_tuple_ipv4 orig = { 3059dd7f890SJarno Rajahalme output->ipv4.ct_orig.src, 3069dd7f890SJarno Rajahalme output->ipv4.ct_orig.dst, 3079dd7f890SJarno Rajahalme output->ct.orig_tp.src, 3089dd7f890SJarno Rajahalme output->ct.orig_tp.dst, 309316d4d78SJarno Rajahalme output->ct_orig_proto, 3109dd7f890SJarno Rajahalme }; 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)) { 3159dd7f890SJarno Rajahalme struct ovs_key_ct_tuple_ipv6 orig = { 3169dd7f890SJarno Rajahalme IN6_ADDR_INITIALIZER(output->ipv6.ct_orig.src), 3179dd7f890SJarno Rajahalme IN6_ADDR_INITIALIZER(output->ipv6.ct_orig.dst), 3189dd7f890SJarno Rajahalme output->ct.orig_tp.src, 3199dd7f890SJarno Rajahalme output->ct.orig_tp.dst, 320316d4d78SJarno Rajahalme output->ct_orig_proto, 3219dd7f890SJarno Rajahalme }; 3229dd7f890SJarno Rajahalme if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6, 3239dd7f890SJarno Rajahalme sizeof(orig), &orig)) 3249dd7f890SJarno Rajahalme return -EMSGSIZE; 3259dd7f890SJarno Rajahalme } 3269dd7f890SJarno Rajahalme } 3279dd7f890SJarno Rajahalme 328182e3042SJoe Stringer return 0; 329182e3042SJoe Stringer } 330182e3042SJoe Stringer 3316ffcea79SJarno Rajahalme static int ovs_ct_set_mark(struct nf_conn *ct, struct sw_flow_key *key, 332182e3042SJoe Stringer u32 ct_mark, u32 mask) 333182e3042SJoe Stringer { 3340d5cdef8SJoe Stringer #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 335182e3042SJoe Stringer u32 new_mark; 336182e3042SJoe Stringer 337182e3042SJoe Stringer new_mark = ct_mark | (ct->mark & ~(mask)); 338182e3042SJoe Stringer if (ct->mark != new_mark) { 339182e3042SJoe Stringer ct->mark = new_mark; 340193e3096SJarno Rajahalme if (nf_ct_is_confirmed(ct)) 341182e3042SJoe Stringer nf_conntrack_event_cache(IPCT_MARK, ct); 342182e3042SJoe Stringer key->ct.mark = new_mark; 343182e3042SJoe Stringer } 344182e3042SJoe Stringer 3457f8a436eSJoe Stringer return 0; 3460d5cdef8SJoe Stringer #else 3470d5cdef8SJoe Stringer return -ENOTSUPP; 3480d5cdef8SJoe Stringer #endif 3497f8a436eSJoe Stringer } 3507f8a436eSJoe Stringer 3516ffcea79SJarno Rajahalme static struct nf_conn_labels *ovs_ct_get_conn_labels(struct nf_conn *ct) 352c2ac6673SJoe Stringer { 353c2ac6673SJoe Stringer struct nf_conn_labels *cl; 354c2ac6673SJoe Stringer 355c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 356c2ac6673SJoe Stringer if (!cl) { 357c2ac6673SJoe Stringer nf_ct_labels_ext_add(ct); 358c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 359c2ac6673SJoe Stringer } 3606ffcea79SJarno Rajahalme 3616ffcea79SJarno Rajahalme return cl; 3626ffcea79SJarno Rajahalme } 3636ffcea79SJarno Rajahalme 3646ffcea79SJarno Rajahalme /* Initialize labels for a new, yet to be committed conntrack entry. Note that 3656ffcea79SJarno Rajahalme * since the new connection is not yet confirmed, and thus no-one else has 3662317c6b5SJarno Rajahalme * access to it's labels, we simply write them over. 3676ffcea79SJarno Rajahalme */ 3686ffcea79SJarno Rajahalme static int ovs_ct_init_labels(struct nf_conn *ct, struct sw_flow_key *key, 3696ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 3706ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 3716ffcea79SJarno Rajahalme { 37209aa98adSJarno Rajahalme struct nf_conn_labels *cl, *master_cl; 37309aa98adSJarno Rajahalme bool have_mask = labels_nonzero(mask); 37409aa98adSJarno Rajahalme 37509aa98adSJarno Rajahalme /* Inherit master's labels to the related connection? */ 37609aa98adSJarno Rajahalme master_cl = ct->master ? nf_ct_labels_find(ct->master) : NULL; 37709aa98adSJarno Rajahalme 37809aa98adSJarno Rajahalme if (!master_cl && !have_mask) 37909aa98adSJarno Rajahalme return 0; /* Nothing to do. */ 3806ffcea79SJarno Rajahalme 3816ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 382b87cec38SJarno Rajahalme if (!cl) 383c2ac6673SJoe Stringer return -ENOSPC; 384c2ac6673SJoe Stringer 38509aa98adSJarno Rajahalme /* Inherit the master's labels, if any. */ 38609aa98adSJarno Rajahalme if (master_cl) 38709aa98adSJarno Rajahalme *cl = *master_cl; 38809aa98adSJarno Rajahalme 38909aa98adSJarno Rajahalme if (have_mask) { 39009aa98adSJarno Rajahalme u32 *dst = (u32 *)cl->bits; 39109aa98adSJarno Rajahalme int i; 39209aa98adSJarno Rajahalme 3936ffcea79SJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 3946ffcea79SJarno Rajahalme dst[i] = (dst[i] & ~mask->ct_labels_32[i]) | 39509aa98adSJarno Rajahalme (labels->ct_labels_32[i] 39609aa98adSJarno Rajahalme & mask->ct_labels_32[i]); 39709aa98adSJarno Rajahalme } 3986ffcea79SJarno Rajahalme 3992317c6b5SJarno Rajahalme /* Labels are included in the IPCTNL_MSG_CT_NEW event only if the 400abd0a4f2SJarno Rajahalme * IPCT_LABEL bit is set in the event cache. 4012317c6b5SJarno Rajahalme */ 4022317c6b5SJarno Rajahalme nf_conntrack_event_cache(IPCT_LABEL, ct); 4032317c6b5SJarno Rajahalme 4046ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 4056ffcea79SJarno Rajahalme 4066ffcea79SJarno Rajahalme return 0; 4076ffcea79SJarno Rajahalme } 4086ffcea79SJarno Rajahalme 4096ffcea79SJarno Rajahalme static int ovs_ct_set_labels(struct nf_conn *ct, struct sw_flow_key *key, 4106ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 4116ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 4126ffcea79SJarno Rajahalme { 4136ffcea79SJarno Rajahalme struct nf_conn_labels *cl; 4146ffcea79SJarno Rajahalme int err; 4156ffcea79SJarno Rajahalme 4166ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 4176ffcea79SJarno Rajahalme if (!cl) 4186ffcea79SJarno Rajahalme return -ENOSPC; 4196ffcea79SJarno Rajahalme 4206ffcea79SJarno Rajahalme err = nf_connlabels_replace(ct, labels->ct_labels_32, 421cb80d58fSJarno Rajahalme mask->ct_labels_32, 422cb80d58fSJarno Rajahalme OVS_CT_LABELS_LEN_32); 423c2ac6673SJoe Stringer if (err) 424c2ac6673SJoe Stringer return err; 425193e3096SJarno Rajahalme 4266ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 427c2ac6673SJoe Stringer 428c2ac6673SJoe Stringer return 0; 429c2ac6673SJoe Stringer } 430c2ac6673SJoe Stringer 431cae3a262SJoe Stringer /* 'skb' should already be pulled to nh_ofs. */ 432cae3a262SJoe Stringer static int ovs_ct_helper(struct sk_buff *skb, u16 proto) 433cae3a262SJoe Stringer { 434cae3a262SJoe Stringer const struct nf_conntrack_helper *helper; 435cae3a262SJoe Stringer const struct nf_conn_help *help; 436cae3a262SJoe Stringer enum ip_conntrack_info ctinfo; 437cae3a262SJoe Stringer unsigned int protoff; 438cae3a262SJoe Stringer struct nf_conn *ct; 43905752523SJarno Rajahalme int err; 440cae3a262SJoe Stringer 441cae3a262SJoe Stringer ct = nf_ct_get(skb, &ctinfo); 442cae3a262SJoe Stringer if (!ct || ctinfo == IP_CT_RELATED_REPLY) 443cae3a262SJoe Stringer return NF_ACCEPT; 444cae3a262SJoe Stringer 445cae3a262SJoe Stringer help = nfct_help(ct); 446cae3a262SJoe Stringer if (!help) 447cae3a262SJoe Stringer return NF_ACCEPT; 448cae3a262SJoe Stringer 449cae3a262SJoe Stringer helper = rcu_dereference(help->helper); 450cae3a262SJoe Stringer if (!helper) 451cae3a262SJoe Stringer return NF_ACCEPT; 452cae3a262SJoe Stringer 453cae3a262SJoe Stringer switch (proto) { 454cae3a262SJoe Stringer case NFPROTO_IPV4: 455cae3a262SJoe Stringer protoff = ip_hdrlen(skb); 456cae3a262SJoe Stringer break; 457cae3a262SJoe Stringer case NFPROTO_IPV6: { 458cae3a262SJoe Stringer u8 nexthdr = ipv6_hdr(skb)->nexthdr; 459cae3a262SJoe Stringer __be16 frag_off; 460cc570605SJoe Stringer int ofs; 461cae3a262SJoe Stringer 462cc570605SJoe Stringer ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr, 463cc570605SJoe Stringer &frag_off); 464cc570605SJoe Stringer if (ofs < 0 || (frag_off & htons(~0x7)) != 0) { 465cae3a262SJoe Stringer pr_debug("proto header not found\n"); 466cae3a262SJoe Stringer return NF_ACCEPT; 467cae3a262SJoe Stringer } 468cc570605SJoe Stringer protoff = ofs; 469cae3a262SJoe Stringer break; 470cae3a262SJoe Stringer } 471cae3a262SJoe Stringer default: 472cae3a262SJoe Stringer WARN_ONCE(1, "helper invoked on non-IP family!"); 473cae3a262SJoe Stringer return NF_DROP; 474cae3a262SJoe Stringer } 475cae3a262SJoe Stringer 47605752523SJarno Rajahalme err = helper->help(skb, protoff, ct, ctinfo); 47705752523SJarno Rajahalme if (err != NF_ACCEPT) 47805752523SJarno Rajahalme return err; 47905752523SJarno Rajahalme 48005752523SJarno Rajahalme /* Adjust seqs after helper. This is needed due to some helpers (e.g., 48105752523SJarno Rajahalme * FTP with NAT) adusting the TCP payload size when mangling IP 48205752523SJarno Rajahalme * addresses and/or port numbers in the text-based control connection. 48305752523SJarno Rajahalme */ 48405752523SJarno Rajahalme if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) && 48505752523SJarno Rajahalme !nf_ct_seq_adjust(skb, ct, ctinfo, protoff)) 48605752523SJarno Rajahalme return NF_DROP; 48705752523SJarno Rajahalme return NF_ACCEPT; 488cae3a262SJoe Stringer } 489cae3a262SJoe Stringer 49074c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 49174c16618SJoe Stringer * value if 'skb' is freed. 49274c16618SJoe Stringer */ 4937f8a436eSJoe Stringer static int handle_fragments(struct net *net, struct sw_flow_key *key, 4947f8a436eSJoe Stringer u16 zone, struct sk_buff *skb) 4957f8a436eSJoe Stringer { 4967f8a436eSJoe Stringer struct ovs_skb_cb ovs_cb = *OVS_CB(skb); 497daaa7d64SFlorian Westphal int err; 4987f8a436eSJoe Stringer 4997f8a436eSJoe Stringer if (key->eth.type == htons(ETH_P_IP)) { 5007f8a436eSJoe Stringer enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; 5017f8a436eSJoe Stringer 5027f8a436eSJoe Stringer memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); 50319bcf9f2SEric W. Biederman err = ip_defrag(net, skb, user); 5047f8a436eSJoe Stringer if (err) 5057f8a436eSJoe Stringer return err; 5067f8a436eSJoe Stringer 5077f8a436eSJoe Stringer ovs_cb.mru = IPCB(skb)->frag_max_size; 5087f8a436eSJoe Stringer #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 50974c16618SJoe Stringer } else if (key->eth.type == htons(ETH_P_IPV6)) { 5107f8a436eSJoe Stringer enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; 5117f8a436eSJoe Stringer 5127f8a436eSJoe Stringer memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); 513daaa7d64SFlorian Westphal err = nf_ct_frag6_gather(net, skb, user); 514f92a80a9SDaniele Di Proietto if (err) { 515f92a80a9SDaniele Di Proietto if (err != -EINPROGRESS) 516f92a80a9SDaniele Di Proietto kfree_skb(skb); 517daaa7d64SFlorian Westphal return err; 518f92a80a9SDaniele Di Proietto } 5197f8a436eSJoe Stringer 520daaa7d64SFlorian Westphal key->ip.proto = ipv6_hdr(skb)->nexthdr; 5217f8a436eSJoe Stringer ovs_cb.mru = IP6CB(skb)->frag_max_size; 5227f8a436eSJoe Stringer #endif 5237f8a436eSJoe Stringer } else { 52474c16618SJoe Stringer kfree_skb(skb); 5257f8a436eSJoe Stringer return -EPFNOSUPPORT; 5267f8a436eSJoe Stringer } 5277f8a436eSJoe Stringer 5287f8a436eSJoe Stringer key->ip.frag = OVS_FRAG_TYPE_NONE; 5297f8a436eSJoe Stringer skb_clear_hash(skb); 5307f8a436eSJoe Stringer skb->ignore_df = 1; 5317f8a436eSJoe Stringer *OVS_CB(skb) = ovs_cb; 5327f8a436eSJoe Stringer 5337f8a436eSJoe Stringer return 0; 5347f8a436eSJoe Stringer } 5357f8a436eSJoe Stringer 5367f8a436eSJoe Stringer static struct nf_conntrack_expect * 5377f8a436eSJoe Stringer ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone, 5387f8a436eSJoe Stringer u16 proto, const struct sk_buff *skb) 5397f8a436eSJoe Stringer { 5407f8a436eSJoe Stringer struct nf_conntrack_tuple tuple; 541cf5d7091SJarno Rajahalme struct nf_conntrack_expect *exp; 5427f8a436eSJoe Stringer 543a31f1adcSEric W. Biederman if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, net, &tuple)) 5447f8a436eSJoe Stringer return NULL; 545cf5d7091SJarno Rajahalme 546cf5d7091SJarno Rajahalme exp = __nf_ct_expect_find(net, zone, &tuple); 547cf5d7091SJarno Rajahalme if (exp) { 548cf5d7091SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 549cf5d7091SJarno Rajahalme 550cf5d7091SJarno Rajahalme /* Delete existing conntrack entry, if it clashes with the 551cf5d7091SJarno Rajahalme * expectation. This can happen since conntrack ALGs do not 552cf5d7091SJarno Rajahalme * check for clashes between (new) expectations and existing 553cf5d7091SJarno Rajahalme * conntrack entries. nf_conntrack_in() will check the 554cf5d7091SJarno Rajahalme * expectations only if a conntrack entry can not be found, 555cf5d7091SJarno Rajahalme * which can lead to OVS finding the expectation (here) in the 556cf5d7091SJarno Rajahalme * init direction, but which will not be removed by the 557cf5d7091SJarno Rajahalme * nf_conntrack_in() call, if a matching conntrack entry is 558cf5d7091SJarno Rajahalme * found instead. In this case all init direction packets 559cf5d7091SJarno Rajahalme * would be reported as new related packets, while reply 560cf5d7091SJarno Rajahalme * direction packets would be reported as un-related 561cf5d7091SJarno Rajahalme * established packets. 562cf5d7091SJarno Rajahalme */ 563cf5d7091SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 564cf5d7091SJarno Rajahalme if (h) { 565cf5d7091SJarno Rajahalme struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 566cf5d7091SJarno Rajahalme 567cf5d7091SJarno Rajahalme nf_ct_delete(ct, 0, 0); 568cf5d7091SJarno Rajahalme nf_conntrack_put(&ct->ct_general); 569cf5d7091SJarno Rajahalme } 570cf5d7091SJarno Rajahalme } 571cf5d7091SJarno Rajahalme 572cf5d7091SJarno Rajahalme return exp; 5737f8a436eSJoe Stringer } 5747f8a436eSJoe Stringer 575289f2253SJarno Rajahalme /* This replicates logic from nf_conntrack_core.c that is not exported. */ 576289f2253SJarno Rajahalme static enum ip_conntrack_info 577289f2253SJarno Rajahalme ovs_ct_get_info(const struct nf_conntrack_tuple_hash *h) 578289f2253SJarno Rajahalme { 579289f2253SJarno Rajahalme const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 580289f2253SJarno Rajahalme 581289f2253SJarno Rajahalme if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) 582289f2253SJarno Rajahalme return IP_CT_ESTABLISHED_REPLY; 583289f2253SJarno Rajahalme /* Once we've had two way comms, always ESTABLISHED. */ 584289f2253SJarno Rajahalme if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) 585289f2253SJarno Rajahalme return IP_CT_ESTABLISHED; 586289f2253SJarno Rajahalme if (test_bit(IPS_EXPECTED_BIT, &ct->status)) 587289f2253SJarno Rajahalme return IP_CT_RELATED; 588289f2253SJarno Rajahalme return IP_CT_NEW; 589289f2253SJarno Rajahalme } 590289f2253SJarno Rajahalme 591289f2253SJarno Rajahalme /* Find an existing connection which this packet belongs to without 592289f2253SJarno Rajahalme * re-attributing statistics or modifying the connection state. This allows an 5935e17da63SJarno Rajahalme * skb->_nfct lost due to an upcall to be recovered during actions execution. 594289f2253SJarno Rajahalme * 595289f2253SJarno Rajahalme * Must be called with rcu_read_lock. 596289f2253SJarno Rajahalme * 5975e17da63SJarno Rajahalme * On success, populates skb->_nfct and returns the connection. Returns NULL 5985e17da63SJarno Rajahalme * if there is no existing entry. 599289f2253SJarno Rajahalme */ 600289f2253SJarno Rajahalme static struct nf_conn * 601289f2253SJarno Rajahalme ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone, 6029ff464dbSJarno Rajahalme u8 l3num, struct sk_buff *skb, bool natted) 603289f2253SJarno Rajahalme { 604289f2253SJarno Rajahalme struct nf_conntrack_tuple tuple; 605289f2253SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 606289f2253SJarno Rajahalme struct nf_conn *ct; 607289f2253SJarno Rajahalme 60860e3be94SFlorian Westphal if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), l3num, 60960e3be94SFlorian Westphal net, &tuple)) { 610289f2253SJarno Rajahalme pr_debug("ovs_ct_find_existing: Can't get tuple\n"); 611289f2253SJarno Rajahalme return NULL; 612289f2253SJarno Rajahalme } 613289f2253SJarno Rajahalme 6149ff464dbSJarno Rajahalme /* Must invert the tuple if skb has been transformed by NAT. */ 6159ff464dbSJarno Rajahalme if (natted) { 6169ff464dbSJarno Rajahalme struct nf_conntrack_tuple inverse; 6179ff464dbSJarno Rajahalme 618303e0c55SFlorian Westphal if (!nf_ct_invert_tuple(&inverse, &tuple)) { 6199ff464dbSJarno Rajahalme pr_debug("ovs_ct_find_existing: Inversion failed!\n"); 6209ff464dbSJarno Rajahalme return NULL; 6219ff464dbSJarno Rajahalme } 6229ff464dbSJarno Rajahalme tuple = inverse; 6239ff464dbSJarno Rajahalme } 6249ff464dbSJarno Rajahalme 625289f2253SJarno Rajahalme /* look for tuple match */ 626289f2253SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 627289f2253SJarno Rajahalme if (!h) 628289f2253SJarno Rajahalme return NULL; /* Not found. */ 629289f2253SJarno Rajahalme 630289f2253SJarno Rajahalme ct = nf_ct_tuplehash_to_ctrack(h); 631289f2253SJarno Rajahalme 6329ff464dbSJarno Rajahalme /* Inverted packet tuple matches the reverse direction conntrack tuple, 6339ff464dbSJarno Rajahalme * select the other tuplehash to get the right 'ctinfo' bits for this 6349ff464dbSJarno Rajahalme * packet. 6359ff464dbSJarno Rajahalme */ 6369ff464dbSJarno Rajahalme if (natted) 6379ff464dbSJarno Rajahalme h = &ct->tuplehash[!h->tuple.dst.dir]; 6389ff464dbSJarno Rajahalme 639c74454faSFlorian Westphal nf_ct_set(skb, ct, ovs_ct_get_info(h)); 640289f2253SJarno Rajahalme return ct; 641289f2253SJarno Rajahalme } 642289f2253SJarno Rajahalme 6438b97ac5bSGreg Rose static 6448b97ac5bSGreg Rose struct nf_conn *ovs_ct_executed(struct net *net, 6458b97ac5bSGreg Rose const struct sw_flow_key *key, 6468b97ac5bSGreg Rose const struct ovs_conntrack_info *info, 6478b97ac5bSGreg Rose struct sk_buff *skb, 6488b97ac5bSGreg Rose bool *ct_executed) 6498b97ac5bSGreg Rose { 6508b97ac5bSGreg Rose struct nf_conn *ct = NULL; 6518b97ac5bSGreg Rose 6528b97ac5bSGreg Rose /* If no ct, check if we have evidence that an existing conntrack entry 6538b97ac5bSGreg Rose * might be found for this skb. This happens when we lose a skb->_nfct 6548b97ac5bSGreg Rose * due to an upcall, or if the direction is being forced. If the 6558b97ac5bSGreg Rose * connection was not confirmed, it is not cached and needs to be run 6568b97ac5bSGreg Rose * through conntrack again. 6578b97ac5bSGreg Rose */ 6588b97ac5bSGreg Rose *ct_executed = (key->ct_state & OVS_CS_F_TRACKED) && 6598b97ac5bSGreg Rose !(key->ct_state & OVS_CS_F_INVALID) && 6608b97ac5bSGreg Rose (key->ct_zone == info->zone.id); 6618b97ac5bSGreg Rose 6628b97ac5bSGreg Rose if (*ct_executed || (!key->ct_state && info->force)) { 6638b97ac5bSGreg Rose ct = ovs_ct_find_existing(net, &info->zone, info->family, skb, 6648b97ac5bSGreg Rose !!(key->ct_state & 6658b97ac5bSGreg Rose OVS_CS_F_NAT_MASK)); 6668b97ac5bSGreg Rose } 6678b97ac5bSGreg Rose 6688b97ac5bSGreg Rose return ct; 6698b97ac5bSGreg Rose } 6708b97ac5bSGreg Rose 6715e17da63SJarno Rajahalme /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ 672289f2253SJarno Rajahalme static bool skb_nfct_cached(struct net *net, 673289f2253SJarno Rajahalme const struct sw_flow_key *key, 674289f2253SJarno Rajahalme const struct ovs_conntrack_info *info, 675289f2253SJarno Rajahalme struct sk_buff *skb) 6767f8a436eSJoe Stringer { 6777f8a436eSJoe Stringer enum ip_conntrack_info ctinfo; 6787f8a436eSJoe Stringer struct nf_conn *ct; 6798b97ac5bSGreg Rose bool ct_executed = true; 6807f8a436eSJoe Stringer 6817f8a436eSJoe Stringer ct = nf_ct_get(skb, &ctinfo); 6828b97ac5bSGreg Rose if (!ct) 6838b97ac5bSGreg Rose ct = ovs_ct_executed(net, key, info, skb, &ct_executed); 6848b97ac5bSGreg Rose 685dd41d33fSJarno Rajahalme if (ct) 686dd41d33fSJarno Rajahalme nf_ct_get(skb, &ctinfo); 6878b97ac5bSGreg Rose else 6887f8a436eSJoe Stringer return false; 6898b97ac5bSGreg Rose 6907f8a436eSJoe Stringer if (!net_eq(net, read_pnet(&ct->ct_net))) 6917f8a436eSJoe Stringer return false; 6927f8a436eSJoe Stringer if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct))) 6937f8a436eSJoe Stringer return false; 694cae3a262SJoe Stringer if (info->helper) { 695cae3a262SJoe Stringer struct nf_conn_help *help; 696cae3a262SJoe Stringer 697cae3a262SJoe Stringer help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER); 698cae3a262SJoe Stringer if (help && rcu_access_pointer(help->helper) != info->helper) 699cae3a262SJoe Stringer return false; 700cae3a262SJoe Stringer } 70171778951SYi-Hung Wei if (info->nf_ct_timeout) { 70271778951SYi-Hung Wei struct nf_conn_timeout *timeout_ext; 70371778951SYi-Hung Wei 70471778951SYi-Hung Wei timeout_ext = nf_ct_timeout_find(ct); 70571778951SYi-Hung Wei if (!timeout_ext || info->nf_ct_timeout != 70671778951SYi-Hung Wei rcu_dereference(timeout_ext->timeout)) 70771778951SYi-Hung Wei return false; 70871778951SYi-Hung Wei } 709dd41d33fSJarno Rajahalme /* Force conntrack entry direction to the current packet? */ 710dd41d33fSJarno Rajahalme if (info->force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { 711dd41d33fSJarno Rajahalme /* Delete the conntrack entry if confirmed, else just release 712dd41d33fSJarno Rajahalme * the reference. 713dd41d33fSJarno Rajahalme */ 714dd41d33fSJarno Rajahalme if (nf_ct_is_confirmed(ct)) 715dd41d33fSJarno Rajahalme nf_ct_delete(ct, 0, 0); 716b768b16dSJarno Rajahalme 717dd41d33fSJarno Rajahalme nf_conntrack_put(&ct->ct_general); 718dd41d33fSJarno Rajahalme nf_ct_set(skb, NULL, 0); 719dd41d33fSJarno Rajahalme return false; 720dd41d33fSJarno Rajahalme } 7217f8a436eSJoe Stringer 7228b97ac5bSGreg Rose return ct_executed; 7237f8a436eSJoe Stringer } 7247f8a436eSJoe Stringer 7254806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 72605752523SJarno Rajahalme /* Modelled after nf_nat_ipv[46]_fn(). 72705752523SJarno Rajahalme * range is only used for new, uninitialized NAT state. 72805752523SJarno Rajahalme * Returns either NF_ACCEPT or NF_DROP. 72905752523SJarno Rajahalme */ 73005752523SJarno Rajahalme static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct, 73105752523SJarno Rajahalme enum ip_conntrack_info ctinfo, 7322eb0f624SThierry Du Tre const struct nf_nat_range2 *range, 73305752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 73405752523SJarno Rajahalme { 73505752523SJarno Rajahalme int hooknum, nh_off, err = NF_ACCEPT; 73605752523SJarno Rajahalme 73705752523SJarno Rajahalme nh_off = skb_network_offset(skb); 73875f01a4cSLance Richardson skb_pull_rcsum(skb, nh_off); 73905752523SJarno Rajahalme 74005752523SJarno Rajahalme /* See HOOK2MANIP(). */ 74105752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) 74205752523SJarno Rajahalme hooknum = NF_INET_LOCAL_IN; /* Source NAT */ 74305752523SJarno Rajahalme else 74405752523SJarno Rajahalme hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */ 74505752523SJarno Rajahalme 74605752523SJarno Rajahalme switch (ctinfo) { 74705752523SJarno Rajahalme case IP_CT_RELATED: 74805752523SJarno Rajahalme case IP_CT_RELATED_REPLY: 7493bf195aeSFlorian Westphal if (IS_ENABLED(CONFIG_NF_NAT) && 75099b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IP) && 75105752523SJarno Rajahalme ip_hdr(skb)->protocol == IPPROTO_ICMP) { 75205752523SJarno Rajahalme if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo, 75305752523SJarno Rajahalme hooknum)) 75405752523SJarno Rajahalme err = NF_DROP; 75505752523SJarno Rajahalme goto push; 7563bf195aeSFlorian Westphal } else if (IS_ENABLED(CONFIG_IPV6) && 75799b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IPV6)) { 75805752523SJarno Rajahalme __be16 frag_off; 75905752523SJarno Rajahalme u8 nexthdr = ipv6_hdr(skb)->nexthdr; 76005752523SJarno Rajahalme int hdrlen = ipv6_skip_exthdr(skb, 76105752523SJarno Rajahalme sizeof(struct ipv6hdr), 76205752523SJarno Rajahalme &nexthdr, &frag_off); 76305752523SJarno Rajahalme 76405752523SJarno Rajahalme if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) { 76505752523SJarno Rajahalme if (!nf_nat_icmpv6_reply_translation(skb, ct, 76605752523SJarno Rajahalme ctinfo, 76705752523SJarno Rajahalme hooknum, 76805752523SJarno Rajahalme hdrlen)) 76905752523SJarno Rajahalme err = NF_DROP; 77005752523SJarno Rajahalme goto push; 77105752523SJarno Rajahalme } 77205752523SJarno Rajahalme } 77305752523SJarno Rajahalme /* Non-ICMP, fall thru to initialize if needed. */ 774279badc2SGustavo A. R. Silva /* fall through */ 77505752523SJarno Rajahalme case IP_CT_NEW: 77605752523SJarno Rajahalme /* Seen it before? This can happen for loopback, retrans, 77705752523SJarno Rajahalme * or local packets. 77805752523SJarno Rajahalme */ 77905752523SJarno Rajahalme if (!nf_nat_initialized(ct, maniptype)) { 78005752523SJarno Rajahalme /* Initialize according to the NAT action. */ 78105752523SJarno Rajahalme err = (range && range->flags & NF_NAT_RANGE_MAP_IPS) 78205752523SJarno Rajahalme /* Action is set up to establish a new 78305752523SJarno Rajahalme * mapping. 78405752523SJarno Rajahalme */ 78505752523SJarno Rajahalme ? nf_nat_setup_info(ct, range, maniptype) 78605752523SJarno Rajahalme : nf_nat_alloc_null_binding(ct, hooknum); 78705752523SJarno Rajahalme if (err != NF_ACCEPT) 78805752523SJarno Rajahalme goto push; 78905752523SJarno Rajahalme } 79005752523SJarno Rajahalme break; 79105752523SJarno Rajahalme 79205752523SJarno Rajahalme case IP_CT_ESTABLISHED: 79305752523SJarno Rajahalme case IP_CT_ESTABLISHED_REPLY: 79405752523SJarno Rajahalme break; 79505752523SJarno Rajahalme 79605752523SJarno Rajahalme default: 79705752523SJarno Rajahalme err = NF_DROP; 79805752523SJarno Rajahalme goto push; 79905752523SJarno Rajahalme } 80005752523SJarno Rajahalme 80105752523SJarno Rajahalme err = nf_nat_packet(ct, ctinfo, hooknum, skb); 80205752523SJarno Rajahalme push: 80305752523SJarno Rajahalme skb_push(skb, nh_off); 80475f01a4cSLance Richardson skb_postpush_rcsum(skb, skb->data, nh_off); 80505752523SJarno Rajahalme 80605752523SJarno Rajahalme return err; 80705752523SJarno Rajahalme } 80805752523SJarno Rajahalme 80905752523SJarno Rajahalme static void ovs_nat_update_key(struct sw_flow_key *key, 81005752523SJarno Rajahalme const struct sk_buff *skb, 81105752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 81205752523SJarno Rajahalme { 81305752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) { 81405752523SJarno Rajahalme __be16 src; 81505752523SJarno Rajahalme 816316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_SRC_NAT; 81705752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 81805752523SJarno Rajahalme key->ipv4.addr.src = ip_hdr(skb)->saddr; 81905752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 82005752523SJarno Rajahalme memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr, 82105752523SJarno Rajahalme sizeof(key->ipv6.addr.src)); 82205752523SJarno Rajahalme else 82305752523SJarno Rajahalme return; 82405752523SJarno Rajahalme 82505752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 82605752523SJarno Rajahalme src = udp_hdr(skb)->source; 82705752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 82805752523SJarno Rajahalme src = tcp_hdr(skb)->source; 82905752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 83005752523SJarno Rajahalme src = sctp_hdr(skb)->source; 83105752523SJarno Rajahalme else 83205752523SJarno Rajahalme return; 83305752523SJarno Rajahalme 83405752523SJarno Rajahalme key->tp.src = src; 83505752523SJarno Rajahalme } else { 83605752523SJarno Rajahalme __be16 dst; 83705752523SJarno Rajahalme 838316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_DST_NAT; 83905752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 84005752523SJarno Rajahalme key->ipv4.addr.dst = ip_hdr(skb)->daddr; 84105752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 84205752523SJarno Rajahalme memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr, 84305752523SJarno Rajahalme sizeof(key->ipv6.addr.dst)); 84405752523SJarno Rajahalme else 84505752523SJarno Rajahalme return; 84605752523SJarno Rajahalme 84705752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 84805752523SJarno Rajahalme dst = udp_hdr(skb)->dest; 84905752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 85005752523SJarno Rajahalme dst = tcp_hdr(skb)->dest; 85105752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 85205752523SJarno Rajahalme dst = sctp_hdr(skb)->dest; 85305752523SJarno Rajahalme else 85405752523SJarno Rajahalme return; 85505752523SJarno Rajahalme 85605752523SJarno Rajahalme key->tp.dst = dst; 85705752523SJarno Rajahalme } 85805752523SJarno Rajahalme } 85905752523SJarno Rajahalme 86005752523SJarno Rajahalme /* Returns NF_DROP if the packet should be dropped, NF_ACCEPT otherwise. */ 86105752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 86205752523SJarno Rajahalme const struct ovs_conntrack_info *info, 86305752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 86405752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 86505752523SJarno Rajahalme { 86605752523SJarno Rajahalme enum nf_nat_manip_type maniptype; 86705752523SJarno Rajahalme int err; 86805752523SJarno Rajahalme 86905752523SJarno Rajahalme /* Add NAT extension if not confirmed yet. */ 87005752523SJarno Rajahalme if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct)) 87105752523SJarno Rajahalme return NF_ACCEPT; /* Can't NAT. */ 87205752523SJarno Rajahalme 87305752523SJarno Rajahalme /* Determine NAT type. 87405752523SJarno Rajahalme * Check if the NAT type can be deduced from the tracked connection. 8755745b0beSJarno Rajahalme * Make sure new expected connections (IP_CT_RELATED) are NATted only 8765745b0beSJarno Rajahalme * when committing. 87705752523SJarno Rajahalme */ 87805752523SJarno Rajahalme if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW && 87905752523SJarno Rajahalme ct->status & IPS_NAT_MASK && 8805745b0beSJarno Rajahalme (ctinfo != IP_CT_RELATED || info->commit)) { 88105752523SJarno Rajahalme /* NAT an established or related connection like before. */ 88205752523SJarno Rajahalme if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) 88305752523SJarno Rajahalme /* This is the REPLY direction for a connection 88405752523SJarno Rajahalme * for which NAT was applied in the forward 88505752523SJarno Rajahalme * direction. Do the reverse NAT. 88605752523SJarno Rajahalme */ 88705752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 88805752523SJarno Rajahalme ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC; 88905752523SJarno Rajahalme else 89005752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 89105752523SJarno Rajahalme ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST; 89205752523SJarno Rajahalme } else if (info->nat & OVS_CT_SRC_NAT) { 89305752523SJarno Rajahalme maniptype = NF_NAT_MANIP_SRC; 89405752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 89505752523SJarno Rajahalme maniptype = NF_NAT_MANIP_DST; 89605752523SJarno Rajahalme } else { 89705752523SJarno Rajahalme return NF_ACCEPT; /* Connection is not NATed. */ 89805752523SJarno Rajahalme } 89905752523SJarno Rajahalme err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, maniptype); 90005752523SJarno Rajahalme 90105752523SJarno Rajahalme /* Mark NAT done if successful and update the flow key. */ 90205752523SJarno Rajahalme if (err == NF_ACCEPT) 90305752523SJarno Rajahalme ovs_nat_update_key(key, skb, maniptype); 90405752523SJarno Rajahalme 90505752523SJarno Rajahalme return err; 90605752523SJarno Rajahalme } 9074806e975SFlorian Westphal #else /* !CONFIG_NF_NAT */ 90805752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 90905752523SJarno Rajahalme const struct ovs_conntrack_info *info, 91005752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 91105752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 91205752523SJarno Rajahalme { 91305752523SJarno Rajahalme return NF_ACCEPT; 91405752523SJarno Rajahalme } 91505752523SJarno Rajahalme #endif 91605752523SJarno Rajahalme 9179f13ded8SJarno Rajahalme /* Pass 'skb' through conntrack in 'net', using zone configured in 'info', if 918394e910eSJarno Rajahalme * not done already. Update key with new CT state after passing the packet 919394e910eSJarno Rajahalme * through conntrack. 9205e17da63SJarno Rajahalme * Note that if the packet is deemed invalid by conntrack, skb->_nfct will be 9219f13ded8SJarno Rajahalme * set to NULL and 0 will be returned. 9229f13ded8SJarno Rajahalme */ 9234f0909eeSJoe Stringer static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 9247f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 9257f8a436eSJoe Stringer struct sk_buff *skb) 9267f8a436eSJoe Stringer { 9277f8a436eSJoe Stringer /* If we are recirculating packets to match on conntrack fields and 9287f8a436eSJoe Stringer * committing with a separate conntrack action, then we don't need to 9297f8a436eSJoe Stringer * actually run the packet through conntrack twice unless it's for a 9307f8a436eSJoe Stringer * different zone. 9317f8a436eSJoe Stringer */ 93228b6e0c1SJarno Rajahalme bool cached = skb_nfct_cached(net, key, info, skb); 93328b6e0c1SJarno Rajahalme enum ip_conntrack_info ctinfo; 93428b6e0c1SJarno Rajahalme struct nf_conn *ct; 93528b6e0c1SJarno Rajahalme 93628b6e0c1SJarno Rajahalme if (!cached) { 93793e66024SFlorian Westphal struct nf_hook_state state = { 93893e66024SFlorian Westphal .hook = NF_INET_PRE_ROUTING, 93993e66024SFlorian Westphal .pf = info->family, 94093e66024SFlorian Westphal .net = net, 94193e66024SFlorian Westphal }; 9427f8a436eSJoe Stringer struct nf_conn *tmpl = info->ct; 9435b6b9293SJarno Rajahalme int err; 9447f8a436eSJoe Stringer 9457f8a436eSJoe Stringer /* Associate skb with specified zone. */ 9467f8a436eSJoe Stringer if (tmpl) { 947cb9c6836SFlorian Westphal if (skb_nfct(skb)) 948cb9c6836SFlorian Westphal nf_conntrack_put(skb_nfct(skb)); 9497f8a436eSJoe Stringer nf_conntrack_get(&tmpl->ct_general); 950c74454faSFlorian Westphal nf_ct_set(skb, tmpl, IP_CT_NEW); 9517f8a436eSJoe Stringer } 9527f8a436eSJoe Stringer 95393e66024SFlorian Westphal err = nf_conntrack_in(skb, &state); 9545b6b9293SJarno Rajahalme if (err != NF_ACCEPT) 9557f8a436eSJoe Stringer return -ENOENT; 956cae3a262SJoe Stringer 95705752523SJarno Rajahalme /* Clear CT state NAT flags to mark that we have not yet done 95805752523SJarno Rajahalme * NAT after the nf_conntrack_in() call. We can actually clear 95905752523SJarno Rajahalme * the whole state, as it will be re-initialized below. 96005752523SJarno Rajahalme */ 961316d4d78SJarno Rajahalme key->ct_state = 0; 96205752523SJarno Rajahalme 96305752523SJarno Rajahalme /* Update the key, but keep the NAT flags. */ 96405752523SJarno Rajahalme ovs_ct_update_key(skb, info, key, true, true); 96505752523SJarno Rajahalme } 96605752523SJarno Rajahalme 96705752523SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 96805752523SJarno Rajahalme if (ct) { 96905752523SJarno Rajahalme /* Packets starting a new connection must be NATted before the 97005752523SJarno Rajahalme * helper, so that the helper knows about the NAT. We enforce 97105752523SJarno Rajahalme * this by delaying both NAT and helper calls for unconfirmed 97205752523SJarno Rajahalme * connections until the committing CT action. For later 97305752523SJarno Rajahalme * packets NAT and Helper may be called in either order. 97405752523SJarno Rajahalme * 97505752523SJarno Rajahalme * NAT will be done only if the CT action has NAT, and only 97605752523SJarno Rajahalme * once per packet (per zone), as guarded by the NAT bits in 977316d4d78SJarno Rajahalme * the key->ct_state. 97805752523SJarno Rajahalme */ 979316d4d78SJarno Rajahalme if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) && 98005752523SJarno Rajahalme (nf_ct_is_confirmed(ct) || info->commit) && 98105752523SJarno Rajahalme ovs_ct_nat(net, key, info, skb, ct, ctinfo) != NF_ACCEPT) { 98205752523SJarno Rajahalme return -EINVAL; 98328b6e0c1SJarno Rajahalme } 984394e910eSJarno Rajahalme 98516ec3d4fSJoe Stringer /* Userspace may decide to perform a ct lookup without a helper 98616ec3d4fSJoe Stringer * specified followed by a (recirculate and) commit with one. 98716ec3d4fSJoe Stringer * Therefore, for unconfirmed connections which we will commit, 98816ec3d4fSJoe Stringer * we need to attach the helper here. 98916ec3d4fSJoe Stringer */ 99016ec3d4fSJoe Stringer if (!nf_ct_is_confirmed(ct) && info->commit && 99116ec3d4fSJoe Stringer info->helper && !nfct_help(ct)) { 99216ec3d4fSJoe Stringer int err = __nf_ct_try_assign_helper(ct, info->ct, 99316ec3d4fSJoe Stringer GFP_ATOMIC); 99416ec3d4fSJoe Stringer if (err) 99516ec3d4fSJoe Stringer return err; 996fa7e428cSFlavio Leitner 997fa7e428cSFlavio Leitner /* helper installed, add seqadj if NAT is required */ 998fa7e428cSFlavio Leitner if (info->nat && !nfct_seqadj(ct)) { 999fa7e428cSFlavio Leitner if (!nfct_seqadj_ext_add(ct)) 1000fa7e428cSFlavio Leitner return -EINVAL; 1001fa7e428cSFlavio Leitner } 100216ec3d4fSJoe Stringer } 100316ec3d4fSJoe Stringer 100428b6e0c1SJarno Rajahalme /* Call the helper only if: 100505752523SJarno Rajahalme * - nf_conntrack_in() was executed above ("!cached") for a 100605752523SJarno Rajahalme * confirmed connection, or 100728b6e0c1SJarno Rajahalme * - When committing an unconfirmed connection. 100828b6e0c1SJarno Rajahalme */ 100905752523SJarno Rajahalme if ((nf_ct_is_confirmed(ct) ? !cached : info->commit) && 101028b6e0c1SJarno Rajahalme ovs_ct_helper(skb, info->family) != NF_ACCEPT) { 1011cae3a262SJoe Stringer return -EINVAL; 1012cae3a262SJoe Stringer } 101305752523SJarno Rajahalme } 10147f8a436eSJoe Stringer 10157f8a436eSJoe Stringer return 0; 10167f8a436eSJoe Stringer } 10177f8a436eSJoe Stringer 10187f8a436eSJoe Stringer /* Lookup connection and read fields into key. */ 10197f8a436eSJoe Stringer static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 10207f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 10217f8a436eSJoe Stringer struct sk_buff *skb) 10227f8a436eSJoe Stringer { 10237f8a436eSJoe Stringer struct nf_conntrack_expect *exp; 10247f8a436eSJoe Stringer 10259f13ded8SJarno Rajahalme /* If we pass an expected packet through nf_conntrack_in() the 10269f13ded8SJarno Rajahalme * expectation is typically removed, but the packet could still be 10279f13ded8SJarno Rajahalme * lost in upcall processing. To prevent this from happening we 10289f13ded8SJarno Rajahalme * perform an explicit expectation lookup. Expected connections are 10299f13ded8SJarno Rajahalme * always new, and will be passed through conntrack only when they are 10309f13ded8SJarno Rajahalme * committed, as it is OK to remove the expectation at that time. 10319f13ded8SJarno Rajahalme */ 10327f8a436eSJoe Stringer exp = ovs_ct_expect_find(net, &info->zone, info->family, skb); 10337f8a436eSJoe Stringer if (exp) { 10347f8a436eSJoe Stringer u8 state; 10357f8a436eSJoe Stringer 103605752523SJarno Rajahalme /* NOTE: New connections are NATted and Helped only when 103705752523SJarno Rajahalme * committed, so we are not calling into NAT here. 103805752523SJarno Rajahalme */ 10397f8a436eSJoe Stringer state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED; 1040182e3042SJoe Stringer __ovs_ct_update_key(key, state, &info->zone, exp->master); 1041d913d3a7SSamuel Gauthier } else { 1042d913d3a7SSamuel Gauthier struct nf_conn *ct; 1043d913d3a7SSamuel Gauthier int err; 1044d913d3a7SSamuel Gauthier 1045d913d3a7SSamuel Gauthier err = __ovs_ct_lookup(net, key, info, skb); 1046d913d3a7SSamuel Gauthier if (err) 1047d913d3a7SSamuel Gauthier return err; 1048d913d3a7SSamuel Gauthier 1049cb9c6836SFlorian Westphal ct = (struct nf_conn *)skb_nfct(skb); 1050d913d3a7SSamuel Gauthier if (ct) 1051d913d3a7SSamuel Gauthier nf_ct_deliver_cached_events(ct); 1052d913d3a7SSamuel Gauthier } 10537f8a436eSJoe Stringer 10547f8a436eSJoe Stringer return 0; 10557f8a436eSJoe Stringer } 10567f8a436eSJoe Stringer 105733db4125SJoe Stringer static bool labels_nonzero(const struct ovs_key_ct_labels *labels) 1058c2ac6673SJoe Stringer { 1059c2ac6673SJoe Stringer size_t i; 1060c2ac6673SJoe Stringer 1061cb80d58fSJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 1062cb80d58fSJarno Rajahalme if (labels->ct_labels_32[i]) 1063c2ac6673SJoe Stringer return true; 1064c2ac6673SJoe Stringer 1065c2ac6673SJoe Stringer return false; 1066c2ac6673SJoe Stringer } 1067c2ac6673SJoe Stringer 106811efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 106911efd5cbSYi-Hung Wei static struct hlist_head *ct_limit_hash_bucket( 107011efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info, u16 zone) 107111efd5cbSYi-Hung Wei { 107211efd5cbSYi-Hung Wei return &info->limits[zone & (CT_LIMIT_HASH_BUCKETS - 1)]; 107311efd5cbSYi-Hung Wei } 107411efd5cbSYi-Hung Wei 107511efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 107611efd5cbSYi-Hung Wei static void ct_limit_set(const struct ovs_ct_limit_info *info, 107711efd5cbSYi-Hung Wei struct ovs_ct_limit *new_ct_limit) 107811efd5cbSYi-Hung Wei { 107911efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 108011efd5cbSYi-Hung Wei struct hlist_head *head; 108111efd5cbSYi-Hung Wei 108211efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, new_ct_limit->zone); 108311efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 108411efd5cbSYi-Hung Wei if (ct_limit->zone == new_ct_limit->zone) { 108511efd5cbSYi-Hung Wei hlist_replace_rcu(&ct_limit->hlist_node, 108611efd5cbSYi-Hung Wei &new_ct_limit->hlist_node); 108711efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 108811efd5cbSYi-Hung Wei return; 108911efd5cbSYi-Hung Wei } 109011efd5cbSYi-Hung Wei } 109111efd5cbSYi-Hung Wei 109211efd5cbSYi-Hung Wei hlist_add_head_rcu(&new_ct_limit->hlist_node, head); 109311efd5cbSYi-Hung Wei } 109411efd5cbSYi-Hung Wei 109511efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 109611efd5cbSYi-Hung Wei static void ct_limit_del(const struct ovs_ct_limit_info *info, u16 zone) 109711efd5cbSYi-Hung Wei { 109811efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 109911efd5cbSYi-Hung Wei struct hlist_head *head; 110011efd5cbSYi-Hung Wei struct hlist_node *n; 110111efd5cbSYi-Hung Wei 110211efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, zone); 110311efd5cbSYi-Hung Wei hlist_for_each_entry_safe(ct_limit, n, head, hlist_node) { 110411efd5cbSYi-Hung Wei if (ct_limit->zone == zone) { 110511efd5cbSYi-Hung Wei hlist_del_rcu(&ct_limit->hlist_node); 110611efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 110711efd5cbSYi-Hung Wei return; 110811efd5cbSYi-Hung Wei } 110911efd5cbSYi-Hung Wei } 111011efd5cbSYi-Hung Wei } 111111efd5cbSYi-Hung Wei 111211efd5cbSYi-Hung Wei /* Call with RCU read lock */ 111311efd5cbSYi-Hung Wei static u32 ct_limit_get(const struct ovs_ct_limit_info *info, u16 zone) 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, zone); 111911efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 112011efd5cbSYi-Hung Wei if (ct_limit->zone == zone) 112111efd5cbSYi-Hung Wei return ct_limit->limit; 112211efd5cbSYi-Hung Wei } 112311efd5cbSYi-Hung Wei 112411efd5cbSYi-Hung Wei return info->default_limit; 112511efd5cbSYi-Hung Wei } 112611efd5cbSYi-Hung Wei 112711efd5cbSYi-Hung Wei static int ovs_ct_check_limit(struct net *net, 112811efd5cbSYi-Hung Wei const struct ovs_conntrack_info *info, 112911efd5cbSYi-Hung Wei const struct nf_conntrack_tuple *tuple) 113011efd5cbSYi-Hung Wei { 113111efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 113211efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 113311efd5cbSYi-Hung Wei u32 per_zone_limit, connections; 113411efd5cbSYi-Hung Wei u32 conncount_key; 113511efd5cbSYi-Hung Wei 113611efd5cbSYi-Hung Wei conncount_key = info->zone.id; 113711efd5cbSYi-Hung Wei 113811efd5cbSYi-Hung Wei per_zone_limit = ct_limit_get(ct_limit_info, info->zone.id); 113911efd5cbSYi-Hung Wei if (per_zone_limit == OVS_CT_LIMIT_UNLIMITED) 114011efd5cbSYi-Hung Wei return 0; 114111efd5cbSYi-Hung Wei 114211efd5cbSYi-Hung Wei connections = nf_conncount_count(net, ct_limit_info->data, 114311efd5cbSYi-Hung Wei &conncount_key, tuple, &info->zone); 114411efd5cbSYi-Hung Wei if (connections > per_zone_limit) 114511efd5cbSYi-Hung Wei return -ENOMEM; 114611efd5cbSYi-Hung Wei 114711efd5cbSYi-Hung Wei return 0; 114811efd5cbSYi-Hung Wei } 114911efd5cbSYi-Hung Wei #endif 115011efd5cbSYi-Hung Wei 11517d904c7bSJarno Rajahalme /* Lookup connection and confirm if unconfirmed. */ 11527d904c7bSJarno Rajahalme static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, 11537d904c7bSJarno Rajahalme const struct ovs_conntrack_info *info, 11547d904c7bSJarno Rajahalme struct sk_buff *skb) 11557d904c7bSJarno Rajahalme { 11566ffcea79SJarno Rajahalme enum ip_conntrack_info ctinfo; 11576ffcea79SJarno Rajahalme struct nf_conn *ct; 11587d904c7bSJarno Rajahalme int err; 11597d904c7bSJarno Rajahalme 11607d904c7bSJarno Rajahalme err = __ovs_ct_lookup(net, key, info, skb); 11617d904c7bSJarno Rajahalme if (err) 11627d904c7bSJarno Rajahalme return err; 11637d904c7bSJarno Rajahalme 11646ffcea79SJarno Rajahalme /* The connection could be invalid, in which case this is a no-op.*/ 11656ffcea79SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 11666ffcea79SJarno Rajahalme if (!ct) 11676ffcea79SJarno Rajahalme return 0; 11686ffcea79SJarno Rajahalme 116911efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 117011efd5cbSYi-Hung Wei if (static_branch_unlikely(&ovs_ct_limit_enabled)) { 117111efd5cbSYi-Hung Wei if (!nf_ct_is_confirmed(ct)) { 117211efd5cbSYi-Hung Wei err = ovs_ct_check_limit(net, info, 117311efd5cbSYi-Hung Wei &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); 117411efd5cbSYi-Hung Wei if (err) { 117511efd5cbSYi-Hung Wei net_warn_ratelimited("openvswitch: zone: %u " 117643d0e960SColin Ian King "exceeds conntrack limit\n", 117711efd5cbSYi-Hung Wei info->zone.id); 117811efd5cbSYi-Hung Wei return err; 117911efd5cbSYi-Hung Wei } 118011efd5cbSYi-Hung Wei } 118111efd5cbSYi-Hung Wei } 118211efd5cbSYi-Hung Wei #endif 118311efd5cbSYi-Hung Wei 118412064551SJarno Rajahalme /* Set the conntrack event mask if given. NEW and DELETE events have 118512064551SJarno Rajahalme * their own groups, but the NFNLGRP_CONNTRACK_UPDATE group listener 118612064551SJarno Rajahalme * typically would receive many kinds of updates. Setting the event 118712064551SJarno Rajahalme * mask allows those events to be filtered. The set event mask will 118812064551SJarno Rajahalme * remain in effect for the lifetime of the connection unless changed 118912064551SJarno Rajahalme * by a further CT action with both the commit flag and the eventmask 119012064551SJarno Rajahalme * option. */ 119112064551SJarno Rajahalme if (info->have_eventmask) { 119212064551SJarno Rajahalme struct nf_conntrack_ecache *cache = nf_ct_ecache_find(ct); 119312064551SJarno Rajahalme 119412064551SJarno Rajahalme if (cache) 119512064551SJarno Rajahalme cache->ctmask = info->eventmask; 119612064551SJarno Rajahalme } 119712064551SJarno Rajahalme 11987d904c7bSJarno Rajahalme /* Apply changes before confirming the connection so that the initial 11997d904c7bSJarno Rajahalme * conntrack NEW netlink event carries the values given in the CT 12007d904c7bSJarno Rajahalme * action. 12017d904c7bSJarno Rajahalme */ 12027d904c7bSJarno Rajahalme if (info->mark.mask) { 12036ffcea79SJarno Rajahalme err = ovs_ct_set_mark(ct, key, info->mark.value, 12047d904c7bSJarno Rajahalme info->mark.mask); 12057d904c7bSJarno Rajahalme if (err) 12067d904c7bSJarno Rajahalme return err; 12077d904c7bSJarno Rajahalme } 120809aa98adSJarno Rajahalme if (!nf_ct_is_confirmed(ct)) { 12096ffcea79SJarno Rajahalme err = ovs_ct_init_labels(ct, key, &info->labels.value, 12106ffcea79SJarno Rajahalme &info->labels.mask); 121109aa98adSJarno Rajahalme if (err) 121209aa98adSJarno Rajahalme return err; 1213a277d516SArnd Bergmann } else if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1214a277d516SArnd Bergmann labels_nonzero(&info->labels.mask)) { 12156ffcea79SJarno Rajahalme err = ovs_ct_set_labels(ct, key, &info->labels.value, 12167d904c7bSJarno Rajahalme &info->labels.mask); 12177d904c7bSJarno Rajahalme if (err) 12187d904c7bSJarno Rajahalme return err; 12197d904c7bSJarno Rajahalme } 12207d904c7bSJarno Rajahalme /* This will take care of sending queued events even if the connection 12217d904c7bSJarno Rajahalme * is already confirmed. 12227d904c7bSJarno Rajahalme */ 12237d904c7bSJarno Rajahalme if (nf_conntrack_confirm(skb) != NF_ACCEPT) 12247d904c7bSJarno Rajahalme return -EINVAL; 12257d904c7bSJarno Rajahalme 12267d904c7bSJarno Rajahalme return 0; 12277d904c7bSJarno Rajahalme } 12287d904c7bSJarno Rajahalme 12299382fe71SEd Swierk /* Trim the skb to the length specified by the IP/IPv6 header, 12309382fe71SEd Swierk * removing any trailing lower-layer padding. This prepares the skb 12319382fe71SEd Swierk * for higher-layer processing that assumes skb->len excludes padding 12329382fe71SEd Swierk * (such as nf_ip_checksum). The caller needs to pull the skb to the 12339382fe71SEd Swierk * network header, and ensure ip_hdr/ipv6_hdr points to valid data. 12349382fe71SEd Swierk */ 12359382fe71SEd Swierk static int ovs_skb_network_trim(struct sk_buff *skb) 12369382fe71SEd Swierk { 12379382fe71SEd Swierk unsigned int len; 12389382fe71SEd Swierk int err; 12399382fe71SEd Swierk 12409382fe71SEd Swierk switch (skb->protocol) { 12419382fe71SEd Swierk case htons(ETH_P_IP): 12429382fe71SEd Swierk len = ntohs(ip_hdr(skb)->tot_len); 12439382fe71SEd Swierk break; 12449382fe71SEd Swierk case htons(ETH_P_IPV6): 12459382fe71SEd Swierk len = sizeof(struct ipv6hdr) 12469382fe71SEd Swierk + ntohs(ipv6_hdr(skb)->payload_len); 12479382fe71SEd Swierk break; 12489382fe71SEd Swierk default: 12499382fe71SEd Swierk len = skb->len; 12509382fe71SEd Swierk } 12519382fe71SEd Swierk 12529382fe71SEd Swierk err = pskb_trim_rcsum(skb, len); 12539382fe71SEd Swierk if (err) 12549382fe71SEd Swierk kfree_skb(skb); 12559382fe71SEd Swierk 12569382fe71SEd Swierk return err; 12579382fe71SEd Swierk } 12589382fe71SEd Swierk 125974c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 126074c16618SJoe Stringer * value if 'skb' is freed. 126174c16618SJoe Stringer */ 12627f8a436eSJoe Stringer int ovs_ct_execute(struct net *net, struct sk_buff *skb, 12637f8a436eSJoe Stringer struct sw_flow_key *key, 12647f8a436eSJoe Stringer const struct ovs_conntrack_info *info) 12657f8a436eSJoe Stringer { 12667f8a436eSJoe Stringer int nh_ofs; 12677f8a436eSJoe Stringer int err; 12687f8a436eSJoe Stringer 12697f8a436eSJoe Stringer /* The conntrack module expects to be working at L3. */ 12707f8a436eSJoe Stringer nh_ofs = skb_network_offset(skb); 127175f01a4cSLance Richardson skb_pull_rcsum(skb, nh_ofs); 12727f8a436eSJoe Stringer 12739382fe71SEd Swierk err = ovs_skb_network_trim(skb); 12749382fe71SEd Swierk if (err) 12759382fe71SEd Swierk return err; 12769382fe71SEd Swierk 12777f8a436eSJoe Stringer if (key->ip.frag != OVS_FRAG_TYPE_NONE) { 12787f8a436eSJoe Stringer err = handle_fragments(net, key, info->zone.id, skb); 12797f8a436eSJoe Stringer if (err) 12807f8a436eSJoe Stringer return err; 12817f8a436eSJoe Stringer } 12827f8a436eSJoe Stringer 1283ab38a7b5SJoe Stringer if (info->commit) 12847d904c7bSJarno Rajahalme err = ovs_ct_commit(net, key, info, skb); 12857f8a436eSJoe Stringer else 12867f8a436eSJoe Stringer err = ovs_ct_lookup(net, key, info, skb); 12877f8a436eSJoe Stringer 12887f8a436eSJoe Stringer skb_push(skb, nh_ofs); 128975f01a4cSLance Richardson skb_postpush_rcsum(skb, skb->data, nh_ofs); 129074c16618SJoe Stringer if (err) 129174c16618SJoe Stringer kfree_skb(skb); 12927f8a436eSJoe Stringer return err; 12937f8a436eSJoe Stringer } 12947f8a436eSJoe Stringer 1295b8226962SEric Garver int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key) 1296b8226962SEric Garver { 1297b8226962SEric Garver if (skb_nfct(skb)) { 1298b8226962SEric Garver nf_conntrack_put(skb_nfct(skb)); 1299b8226962SEric Garver nf_ct_set(skb, NULL, IP_CT_UNTRACKED); 1300b8226962SEric Garver ovs_ct_fill_key(skb, key); 1301b8226962SEric Garver } 1302b8226962SEric Garver 1303b8226962SEric Garver return 0; 1304b8226962SEric Garver } 1305b8226962SEric Garver 1306cae3a262SJoe Stringer static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name, 1307cae3a262SJoe Stringer const struct sw_flow_key *key, bool log) 1308cae3a262SJoe Stringer { 1309cae3a262SJoe Stringer struct nf_conntrack_helper *helper; 1310cae3a262SJoe Stringer struct nf_conn_help *help; 1311fec9c271SFlavio Leitner int ret = 0; 1312cae3a262SJoe Stringer 1313cae3a262SJoe Stringer helper = nf_conntrack_helper_try_module_get(name, info->family, 1314cae3a262SJoe Stringer key->ip.proto); 1315cae3a262SJoe Stringer if (!helper) { 1316cae3a262SJoe Stringer OVS_NLERR(log, "Unknown helper \"%s\"", name); 1317cae3a262SJoe Stringer return -EINVAL; 1318cae3a262SJoe Stringer } 1319cae3a262SJoe Stringer 1320440534d3SGao Feng help = nf_ct_helper_ext_add(info->ct, GFP_KERNEL); 1321cae3a262SJoe Stringer if (!help) { 1322d91fc59cSLiping Zhang nf_conntrack_helper_put(helper); 1323cae3a262SJoe Stringer return -ENOMEM; 1324cae3a262SJoe Stringer } 1325cae3a262SJoe Stringer 1326f319ca65SGeert Uytterhoeven #if IS_ENABLED(CONFIG_NF_NAT) 1327fec9c271SFlavio Leitner if (info->nat) { 1328fec9c271SFlavio Leitner ret = nf_nat_helper_try_module_get(name, info->family, 1329fec9c271SFlavio Leitner key->ip.proto); 1330fec9c271SFlavio Leitner if (ret) { 1331fec9c271SFlavio Leitner nf_conntrack_helper_put(helper); 1332fec9c271SFlavio Leitner OVS_NLERR(log, "Failed to load \"%s\" NAT helper, error: %d", 1333fec9c271SFlavio Leitner name, ret); 1334fec9c271SFlavio Leitner return ret; 1335fec9c271SFlavio Leitner } 1336fec9c271SFlavio Leitner } 1337fec9c271SFlavio Leitner #endif 1338cae3a262SJoe Stringer rcu_assign_pointer(help->helper, helper); 1339cae3a262SJoe Stringer info->helper = helper; 1340fec9c271SFlavio Leitner return ret; 1341cae3a262SJoe Stringer } 1342cae3a262SJoe Stringer 13434806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 134405752523SJarno Rajahalme static int parse_nat(const struct nlattr *attr, 134505752523SJarno Rajahalme struct ovs_conntrack_info *info, bool log) 134605752523SJarno Rajahalme { 134705752523SJarno Rajahalme struct nlattr *a; 134805752523SJarno Rajahalme int rem; 134905752523SJarno Rajahalme bool have_ip_max = false; 135005752523SJarno Rajahalme bool have_proto_max = false; 135105752523SJarno Rajahalme bool ip_vers = (info->family == NFPROTO_IPV6); 135205752523SJarno Rajahalme 135305752523SJarno Rajahalme nla_for_each_nested(a, attr, rem) { 135405752523SJarno Rajahalme static const int ovs_nat_attr_lens[OVS_NAT_ATTR_MAX + 1][2] = { 135505752523SJarno Rajahalme [OVS_NAT_ATTR_SRC] = {0, 0}, 135605752523SJarno Rajahalme [OVS_NAT_ATTR_DST] = {0, 0}, 135705752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MIN] = {sizeof(struct in_addr), 135805752523SJarno Rajahalme sizeof(struct in6_addr)}, 135905752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MAX] = {sizeof(struct in_addr), 136005752523SJarno Rajahalme sizeof(struct in6_addr)}, 136105752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MIN] = {sizeof(u16), sizeof(u16)}, 136205752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MAX] = {sizeof(u16), sizeof(u16)}, 136305752523SJarno Rajahalme [OVS_NAT_ATTR_PERSISTENT] = {0, 0}, 136405752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_HASH] = {0, 0}, 136505752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_RANDOM] = {0, 0}, 136605752523SJarno Rajahalme }; 136705752523SJarno Rajahalme int type = nla_type(a); 136805752523SJarno Rajahalme 136905752523SJarno Rajahalme if (type > OVS_NAT_ATTR_MAX) { 13700ed80da5SJoe Perches OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)", 137105752523SJarno Rajahalme type, OVS_NAT_ATTR_MAX); 137205752523SJarno Rajahalme return -EINVAL; 137305752523SJarno Rajahalme } 137405752523SJarno Rajahalme 137505752523SJarno Rajahalme if (nla_len(a) != ovs_nat_attr_lens[type][ip_vers]) { 13760ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)", 137705752523SJarno Rajahalme type, nla_len(a), 137805752523SJarno Rajahalme ovs_nat_attr_lens[type][ip_vers]); 137905752523SJarno Rajahalme return -EINVAL; 138005752523SJarno Rajahalme } 138105752523SJarno Rajahalme 138205752523SJarno Rajahalme switch (type) { 138305752523SJarno Rajahalme case OVS_NAT_ATTR_SRC: 138405752523SJarno Rajahalme case OVS_NAT_ATTR_DST: 138505752523SJarno Rajahalme if (info->nat) { 13860ed80da5SJoe Perches OVS_NLERR(log, "Only one type of NAT may be specified"); 138705752523SJarno Rajahalme return -ERANGE; 138805752523SJarno Rajahalme } 138905752523SJarno Rajahalme info->nat |= OVS_CT_NAT; 139005752523SJarno Rajahalme info->nat |= ((type == OVS_NAT_ATTR_SRC) 139105752523SJarno Rajahalme ? OVS_CT_SRC_NAT : OVS_CT_DST_NAT); 139205752523SJarno Rajahalme break; 139305752523SJarno Rajahalme 139405752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MIN: 1395ac71b46eSHaishuang Yan nla_memcpy(&info->range.min_addr, a, 1396ac71b46eSHaishuang Yan sizeof(info->range.min_addr)); 139705752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 139805752523SJarno Rajahalme break; 139905752523SJarno Rajahalme 140005752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MAX: 140105752523SJarno Rajahalme have_ip_max = true; 140205752523SJarno Rajahalme nla_memcpy(&info->range.max_addr, a, 140305752523SJarno Rajahalme sizeof(info->range.max_addr)); 140405752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 140505752523SJarno Rajahalme break; 140605752523SJarno Rajahalme 140705752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MIN: 140805752523SJarno Rajahalme info->range.min_proto.all = htons(nla_get_u16(a)); 140905752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 141005752523SJarno Rajahalme break; 141105752523SJarno Rajahalme 141205752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MAX: 141305752523SJarno Rajahalme have_proto_max = true; 141405752523SJarno Rajahalme info->range.max_proto.all = htons(nla_get_u16(a)); 141505752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 141605752523SJarno Rajahalme break; 141705752523SJarno Rajahalme 141805752523SJarno Rajahalme case OVS_NAT_ATTR_PERSISTENT: 141905752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PERSISTENT; 142005752523SJarno Rajahalme break; 142105752523SJarno Rajahalme 142205752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_HASH: 142305752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM; 142405752523SJarno Rajahalme break; 142505752523SJarno Rajahalme 142605752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_RANDOM: 142705752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM_FULLY; 142805752523SJarno Rajahalme break; 142905752523SJarno Rajahalme 143005752523SJarno Rajahalme default: 14310ed80da5SJoe Perches OVS_NLERR(log, "Unknown nat attribute (%d)", type); 143205752523SJarno Rajahalme return -EINVAL; 143305752523SJarno Rajahalme } 143405752523SJarno Rajahalme } 143505752523SJarno Rajahalme 143605752523SJarno Rajahalme if (rem > 0) { 14370ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem); 143805752523SJarno Rajahalme return -EINVAL; 143905752523SJarno Rajahalme } 144005752523SJarno Rajahalme if (!info->nat) { 144105752523SJarno Rajahalme /* Do not allow flags if no type is given. */ 144205752523SJarno Rajahalme if (info->range.flags) { 144305752523SJarno Rajahalme OVS_NLERR(log, 1444e0b10844SJulia Lawall "NAT flags may be given only when NAT range (SRC or DST) is also specified." 144505752523SJarno Rajahalme ); 144605752523SJarno Rajahalme return -EINVAL; 144705752523SJarno Rajahalme } 144805752523SJarno Rajahalme info->nat = OVS_CT_NAT; /* NAT existing connections. */ 144905752523SJarno Rajahalme } else if (!info->commit) { 145005752523SJarno Rajahalme OVS_NLERR(log, 1451e0b10844SJulia Lawall "NAT attributes may be specified only when CT COMMIT flag is also specified." 145205752523SJarno Rajahalme ); 145305752523SJarno Rajahalme return -EINVAL; 145405752523SJarno Rajahalme } 145505752523SJarno Rajahalme /* Allow missing IP_MAX. */ 145605752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS && !have_ip_max) { 145705752523SJarno Rajahalme memcpy(&info->range.max_addr, &info->range.min_addr, 145805752523SJarno Rajahalme sizeof(info->range.max_addr)); 145905752523SJarno Rajahalme } 146005752523SJarno Rajahalme /* Allow missing PROTO_MAX. */ 146105752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 146205752523SJarno Rajahalme !have_proto_max) { 146305752523SJarno Rajahalme info->range.max_proto.all = info->range.min_proto.all; 146405752523SJarno Rajahalme } 146505752523SJarno Rajahalme return 0; 146605752523SJarno Rajahalme } 146705752523SJarno Rajahalme #endif 146805752523SJarno Rajahalme 14697f8a436eSJoe Stringer static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = { 1470ab38a7b5SJoe Stringer [OVS_CT_ATTR_COMMIT] = { .minlen = 0, .maxlen = 0 }, 1471dd41d33fSJarno Rajahalme [OVS_CT_ATTR_FORCE_COMMIT] = { .minlen = 0, .maxlen = 0 }, 14727f8a436eSJoe Stringer [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16), 14737f8a436eSJoe Stringer .maxlen = sizeof(u16) }, 1474182e3042SJoe Stringer [OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark), 1475182e3042SJoe Stringer .maxlen = sizeof(struct md_mark) }, 147633db4125SJoe Stringer [OVS_CT_ATTR_LABELS] = { .minlen = sizeof(struct md_labels), 147733db4125SJoe Stringer .maxlen = sizeof(struct md_labels) }, 1478cae3a262SJoe Stringer [OVS_CT_ATTR_HELPER] = { .minlen = 1, 147905752523SJarno Rajahalme .maxlen = NF_CT_HELPER_NAME_LEN }, 14804806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 148105752523SJarno Rajahalme /* NAT length is checked when parsing the nested attributes. */ 148205752523SJarno Rajahalme [OVS_CT_ATTR_NAT] = { .minlen = 0, .maxlen = INT_MAX }, 148305752523SJarno Rajahalme #endif 148412064551SJarno Rajahalme [OVS_CT_ATTR_EVENTMASK] = { .minlen = sizeof(u32), 148512064551SJarno Rajahalme .maxlen = sizeof(u32) }, 148606bd2bdfSYi-Hung Wei [OVS_CT_ATTR_TIMEOUT] = { .minlen = 1, 148706bd2bdfSYi-Hung Wei .maxlen = CTNL_TIMEOUT_NAME_MAX }, 14887f8a436eSJoe Stringer }; 14897f8a436eSJoe Stringer 14907f8a436eSJoe Stringer static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info, 1491cae3a262SJoe Stringer const char **helper, bool log) 14927f8a436eSJoe Stringer { 14937f8a436eSJoe Stringer struct nlattr *a; 14947f8a436eSJoe Stringer int rem; 14957f8a436eSJoe Stringer 14967f8a436eSJoe Stringer nla_for_each_nested(a, attr, rem) { 14977f8a436eSJoe Stringer int type = nla_type(a); 149869ec932eSLiping Zhang int maxlen; 149969ec932eSLiping Zhang int minlen; 15007f8a436eSJoe Stringer 15017f8a436eSJoe Stringer if (type > OVS_CT_ATTR_MAX) { 15027f8a436eSJoe Stringer OVS_NLERR(log, 15037f8a436eSJoe Stringer "Unknown conntrack attr (type=%d, max=%d)", 15047f8a436eSJoe Stringer type, OVS_CT_ATTR_MAX); 15057f8a436eSJoe Stringer return -EINVAL; 15067f8a436eSJoe Stringer } 150769ec932eSLiping Zhang 150869ec932eSLiping Zhang maxlen = ovs_ct_attr_lens[type].maxlen; 150969ec932eSLiping Zhang minlen = ovs_ct_attr_lens[type].minlen; 15107f8a436eSJoe Stringer if (nla_len(a) < minlen || nla_len(a) > maxlen) { 15117f8a436eSJoe Stringer OVS_NLERR(log, 15127f8a436eSJoe Stringer "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)", 15137f8a436eSJoe Stringer type, nla_len(a), maxlen); 15147f8a436eSJoe Stringer return -EINVAL; 15157f8a436eSJoe Stringer } 15167f8a436eSJoe Stringer 15177f8a436eSJoe Stringer switch (type) { 1518dd41d33fSJarno Rajahalme case OVS_CT_ATTR_FORCE_COMMIT: 1519dd41d33fSJarno Rajahalme info->force = true; 1520dd41d33fSJarno Rajahalme /* fall through. */ 1521ab38a7b5SJoe Stringer case OVS_CT_ATTR_COMMIT: 1522ab38a7b5SJoe Stringer info->commit = true; 15237f8a436eSJoe Stringer break; 15247f8a436eSJoe Stringer #ifdef CONFIG_NF_CONNTRACK_ZONES 15257f8a436eSJoe Stringer case OVS_CT_ATTR_ZONE: 15267f8a436eSJoe Stringer info->zone.id = nla_get_u16(a); 15277f8a436eSJoe Stringer break; 15287f8a436eSJoe Stringer #endif 1529182e3042SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_MARK 1530182e3042SJoe Stringer case OVS_CT_ATTR_MARK: { 1531182e3042SJoe Stringer struct md_mark *mark = nla_data(a); 1532182e3042SJoe Stringer 1533e754ec69SJoe Stringer if (!mark->mask) { 1534e754ec69SJoe Stringer OVS_NLERR(log, "ct_mark mask cannot be 0"); 1535e754ec69SJoe Stringer return -EINVAL; 1536e754ec69SJoe Stringer } 1537182e3042SJoe Stringer info->mark = *mark; 1538182e3042SJoe Stringer break; 1539182e3042SJoe Stringer } 1540182e3042SJoe Stringer #endif 1541c2ac6673SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_LABELS 154233db4125SJoe Stringer case OVS_CT_ATTR_LABELS: { 154333db4125SJoe Stringer struct md_labels *labels = nla_data(a); 1544c2ac6673SJoe Stringer 1545e754ec69SJoe Stringer if (!labels_nonzero(&labels->mask)) { 1546e754ec69SJoe Stringer OVS_NLERR(log, "ct_labels mask cannot be 0"); 1547e754ec69SJoe Stringer return -EINVAL; 1548e754ec69SJoe Stringer } 154933db4125SJoe Stringer info->labels = *labels; 1550c2ac6673SJoe Stringer break; 1551c2ac6673SJoe Stringer } 1552c2ac6673SJoe Stringer #endif 1553cae3a262SJoe Stringer case OVS_CT_ATTR_HELPER: 1554cae3a262SJoe Stringer *helper = nla_data(a); 1555cae3a262SJoe Stringer if (!memchr(*helper, '\0', nla_len(a))) { 1556cae3a262SJoe Stringer OVS_NLERR(log, "Invalid conntrack helper"); 1557cae3a262SJoe Stringer return -EINVAL; 1558cae3a262SJoe Stringer } 1559cae3a262SJoe Stringer break; 15604806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 156105752523SJarno Rajahalme case OVS_CT_ATTR_NAT: { 156205752523SJarno Rajahalme int err = parse_nat(a, info, log); 156305752523SJarno Rajahalme 156405752523SJarno Rajahalme if (err) 156505752523SJarno Rajahalme return err; 156605752523SJarno Rajahalme break; 156705752523SJarno Rajahalme } 156805752523SJarno Rajahalme #endif 156912064551SJarno Rajahalme case OVS_CT_ATTR_EVENTMASK: 157012064551SJarno Rajahalme info->have_eventmask = true; 157112064551SJarno Rajahalme info->eventmask = nla_get_u32(a); 157212064551SJarno Rajahalme break; 157306bd2bdfSYi-Hung Wei #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 157406bd2bdfSYi-Hung Wei case OVS_CT_ATTR_TIMEOUT: 157506bd2bdfSYi-Hung Wei memcpy(info->timeout, nla_data(a), nla_len(a)); 157606bd2bdfSYi-Hung Wei if (!memchr(info->timeout, '\0', nla_len(a))) { 157712c6bc38SYi-Hung Wei OVS_NLERR(log, "Invalid conntrack timeout"); 157806bd2bdfSYi-Hung Wei return -EINVAL; 157906bd2bdfSYi-Hung Wei } 158006bd2bdfSYi-Hung Wei break; 158106bd2bdfSYi-Hung Wei #endif 158212064551SJarno Rajahalme 15837f8a436eSJoe Stringer default: 15847f8a436eSJoe Stringer OVS_NLERR(log, "Unknown conntrack attr (%d)", 15857f8a436eSJoe Stringer type); 15867f8a436eSJoe Stringer return -EINVAL; 15877f8a436eSJoe Stringer } 15887f8a436eSJoe Stringer } 15897f8a436eSJoe Stringer 15907d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_MARK 15917d904c7bSJarno Rajahalme if (!info->commit && info->mark.mask) { 15927d904c7bSJarno Rajahalme OVS_NLERR(log, 15937d904c7bSJarno Rajahalme "Setting conntrack mark requires 'commit' flag."); 15947d904c7bSJarno Rajahalme return -EINVAL; 15957d904c7bSJarno Rajahalme } 15967d904c7bSJarno Rajahalme #endif 15977d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_LABELS 15987d904c7bSJarno Rajahalme if (!info->commit && labels_nonzero(&info->labels.mask)) { 15997d904c7bSJarno Rajahalme OVS_NLERR(log, 16007d904c7bSJarno Rajahalme "Setting conntrack labels requires 'commit' flag."); 16017d904c7bSJarno Rajahalme return -EINVAL; 16027d904c7bSJarno Rajahalme } 16037d904c7bSJarno Rajahalme #endif 16047f8a436eSJoe Stringer if (rem > 0) { 16057f8a436eSJoe Stringer OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem); 16067f8a436eSJoe Stringer return -EINVAL; 16077f8a436eSJoe Stringer } 16087f8a436eSJoe Stringer 16097f8a436eSJoe Stringer return 0; 16107f8a436eSJoe Stringer } 16117f8a436eSJoe Stringer 1612c2ac6673SJoe Stringer bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr) 16137f8a436eSJoe Stringer { 16147f8a436eSJoe Stringer if (attr == OVS_KEY_ATTR_CT_STATE) 16157f8a436eSJoe Stringer return true; 16167f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 16177f8a436eSJoe Stringer attr == OVS_KEY_ATTR_CT_ZONE) 16187f8a436eSJoe Stringer return true; 1619182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 1620182e3042SJoe Stringer attr == OVS_KEY_ATTR_CT_MARK) 1621182e3042SJoe Stringer return true; 1622c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 162333db4125SJoe Stringer attr == OVS_KEY_ATTR_CT_LABELS) { 1624c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 1625c2ac6673SJoe Stringer 1626c2ac6673SJoe Stringer return ovs_net->xt_label; 1627c2ac6673SJoe Stringer } 16287f8a436eSJoe Stringer 16297f8a436eSJoe Stringer return false; 16307f8a436eSJoe Stringer } 16317f8a436eSJoe Stringer 16327f8a436eSJoe Stringer int ovs_ct_copy_action(struct net *net, const struct nlattr *attr, 16337f8a436eSJoe Stringer const struct sw_flow_key *key, 16347f8a436eSJoe Stringer struct sw_flow_actions **sfa, bool log) 16357f8a436eSJoe Stringer { 16367f8a436eSJoe Stringer struct ovs_conntrack_info ct_info; 1637cae3a262SJoe Stringer const char *helper = NULL; 16387f8a436eSJoe Stringer u16 family; 16397f8a436eSJoe Stringer int err; 16407f8a436eSJoe Stringer 16417f8a436eSJoe Stringer family = key_to_nfproto(key); 16427f8a436eSJoe Stringer if (family == NFPROTO_UNSPEC) { 16437f8a436eSJoe Stringer OVS_NLERR(log, "ct family unspecified"); 16447f8a436eSJoe Stringer return -EINVAL; 16457f8a436eSJoe Stringer } 16467f8a436eSJoe Stringer 16477f8a436eSJoe Stringer memset(&ct_info, 0, sizeof(ct_info)); 16487f8a436eSJoe Stringer ct_info.family = family; 16497f8a436eSJoe Stringer 16507f8a436eSJoe Stringer nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID, 16517f8a436eSJoe Stringer NF_CT_DEFAULT_ZONE_DIR, 0); 16527f8a436eSJoe Stringer 1653cae3a262SJoe Stringer err = parse_ct(attr, &ct_info, &helper, log); 16547f8a436eSJoe Stringer if (err) 16557f8a436eSJoe Stringer return err; 16567f8a436eSJoe Stringer 16577f8a436eSJoe Stringer /* Set up template for tracking connections in specific zones. */ 16587f8a436eSJoe Stringer ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL); 16597f8a436eSJoe Stringer if (!ct_info.ct) { 16607f8a436eSJoe Stringer OVS_NLERR(log, "Failed to allocate conntrack template"); 16617f8a436eSJoe Stringer return -ENOMEM; 16627f8a436eSJoe Stringer } 166306bd2bdfSYi-Hung Wei 166406bd2bdfSYi-Hung Wei if (ct_info.timeout[0]) { 166506bd2bdfSYi-Hung Wei if (nf_ct_set_timeout(net, ct_info.ct, family, key->ip.proto, 166606bd2bdfSYi-Hung Wei ct_info.timeout)) 166706bd2bdfSYi-Hung Wei pr_info_ratelimited("Failed to associated timeout " 166806bd2bdfSYi-Hung Wei "policy `%s'\n", ct_info.timeout); 166971778951SYi-Hung Wei else 167071778951SYi-Hung Wei ct_info.nf_ct_timeout = rcu_dereference( 167171778951SYi-Hung Wei nf_ct_timeout_find(ct_info.ct)->timeout); 167271778951SYi-Hung Wei 167306bd2bdfSYi-Hung Wei } 167406bd2bdfSYi-Hung Wei 1675cae3a262SJoe Stringer if (helper) { 1676cae3a262SJoe Stringer err = ovs_ct_add_helper(&ct_info, helper, key, log); 1677cae3a262SJoe Stringer if (err) 1678cae3a262SJoe Stringer goto err_free_ct; 1679cae3a262SJoe Stringer } 16807f8a436eSJoe Stringer 16817f8a436eSJoe Stringer err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info, 16827f8a436eSJoe Stringer sizeof(ct_info), log); 16837f8a436eSJoe Stringer if (err) 16847f8a436eSJoe Stringer goto err_free_ct; 16857f8a436eSJoe Stringer 16867f6d6558SFlavio Leitner __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status); 16877f6d6558SFlavio Leitner nf_conntrack_get(&ct_info.ct->ct_general); 16887f8a436eSJoe Stringer return 0; 16897f8a436eSJoe Stringer err_free_ct: 16902f3ab9f9SJoe Stringer __ovs_ct_free_action(&ct_info); 16917f8a436eSJoe Stringer return err; 16927f8a436eSJoe Stringer } 16937f8a436eSJoe Stringer 16944806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 169505752523SJarno Rajahalme static bool ovs_ct_nat_to_attr(const struct ovs_conntrack_info *info, 169605752523SJarno Rajahalme struct sk_buff *skb) 169705752523SJarno Rajahalme { 169805752523SJarno Rajahalme struct nlattr *start; 169905752523SJarno Rajahalme 1700ae0be8deSMichal Kubecek start = nla_nest_start_noflag(skb, OVS_CT_ATTR_NAT); 170105752523SJarno Rajahalme if (!start) 170205752523SJarno Rajahalme return false; 170305752523SJarno Rajahalme 170405752523SJarno Rajahalme if (info->nat & OVS_CT_SRC_NAT) { 170505752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_SRC)) 170605752523SJarno Rajahalme return false; 170705752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 170805752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_DST)) 170905752523SJarno Rajahalme return false; 171005752523SJarno Rajahalme } else { 171105752523SJarno Rajahalme goto out; 171205752523SJarno Rajahalme } 171305752523SJarno Rajahalme 171405752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS) { 17153bf195aeSFlorian Westphal if (IS_ENABLED(CONFIG_NF_NAT) && 171699b7248eSArnd Bergmann info->family == NFPROTO_IPV4) { 171705752523SJarno Rajahalme if (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MIN, 171805752523SJarno Rajahalme info->range.min_addr.ip) || 171905752523SJarno Rajahalme (info->range.max_addr.ip 172005752523SJarno Rajahalme != info->range.min_addr.ip && 172105752523SJarno Rajahalme (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MAX, 172205752523SJarno Rajahalme info->range.max_addr.ip)))) 172305752523SJarno Rajahalme return false; 17243bf195aeSFlorian Westphal } else if (IS_ENABLED(CONFIG_IPV6) && 172599b7248eSArnd Bergmann info->family == NFPROTO_IPV6) { 172605752523SJarno Rajahalme if (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MIN, 172705752523SJarno Rajahalme &info->range.min_addr.in6) || 172805752523SJarno Rajahalme (memcmp(&info->range.max_addr.in6, 172905752523SJarno Rajahalme &info->range.min_addr.in6, 173005752523SJarno Rajahalme sizeof(info->range.max_addr.in6)) && 173105752523SJarno Rajahalme (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MAX, 173205752523SJarno Rajahalme &info->range.max_addr.in6)))) 173305752523SJarno Rajahalme return false; 173405752523SJarno Rajahalme } else { 173505752523SJarno Rajahalme return false; 173605752523SJarno Rajahalme } 173705752523SJarno Rajahalme } 173805752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 173905752523SJarno Rajahalme (nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MIN, 174005752523SJarno Rajahalme ntohs(info->range.min_proto.all)) || 174105752523SJarno Rajahalme (info->range.max_proto.all != info->range.min_proto.all && 174205752523SJarno Rajahalme nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MAX, 174305752523SJarno Rajahalme ntohs(info->range.max_proto.all))))) 174405752523SJarno Rajahalme return false; 174505752523SJarno Rajahalme 174605752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PERSISTENT && 174705752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PERSISTENT)) 174805752523SJarno Rajahalme return false; 174905752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM && 175005752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_HASH)) 175105752523SJarno Rajahalme return false; 175205752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY && 175305752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_RANDOM)) 175405752523SJarno Rajahalme return false; 175505752523SJarno Rajahalme out: 175605752523SJarno Rajahalme nla_nest_end(skb, start); 175705752523SJarno Rajahalme 175805752523SJarno Rajahalme return true; 175905752523SJarno Rajahalme } 176005752523SJarno Rajahalme #endif 176105752523SJarno Rajahalme 17627f8a436eSJoe Stringer int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info, 17637f8a436eSJoe Stringer struct sk_buff *skb) 17647f8a436eSJoe Stringer { 17657f8a436eSJoe Stringer struct nlattr *start; 17667f8a436eSJoe Stringer 1767ae0be8deSMichal Kubecek start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CT); 17687f8a436eSJoe Stringer if (!start) 17697f8a436eSJoe Stringer return -EMSGSIZE; 17707f8a436eSJoe Stringer 1771dd41d33fSJarno Rajahalme if (ct_info->commit && nla_put_flag(skb, ct_info->force 1772dd41d33fSJarno Rajahalme ? OVS_CT_ATTR_FORCE_COMMIT 1773dd41d33fSJarno Rajahalme : OVS_CT_ATTR_COMMIT)) 17747f8a436eSJoe Stringer return -EMSGSIZE; 17757f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 17767f8a436eSJoe Stringer nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id)) 17777f8a436eSJoe Stringer return -EMSGSIZE; 1778e754ec69SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && ct_info->mark.mask && 1779182e3042SJoe Stringer nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark), 1780182e3042SJoe Stringer &ct_info->mark)) 1781182e3042SJoe Stringer return -EMSGSIZE; 1782c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1783e754ec69SJoe Stringer labels_nonzero(&ct_info->labels.mask) && 178433db4125SJoe Stringer nla_put(skb, OVS_CT_ATTR_LABELS, sizeof(ct_info->labels), 178533db4125SJoe Stringer &ct_info->labels)) 1786c2ac6673SJoe Stringer return -EMSGSIZE; 1787cae3a262SJoe Stringer if (ct_info->helper) { 1788cae3a262SJoe Stringer if (nla_put_string(skb, OVS_CT_ATTR_HELPER, 1789cae3a262SJoe Stringer ct_info->helper->name)) 1790cae3a262SJoe Stringer return -EMSGSIZE; 1791cae3a262SJoe Stringer } 179212064551SJarno Rajahalme if (ct_info->have_eventmask && 179312064551SJarno Rajahalme nla_put_u32(skb, OVS_CT_ATTR_EVENTMASK, ct_info->eventmask)) 179412064551SJarno Rajahalme return -EMSGSIZE; 179506bd2bdfSYi-Hung Wei if (ct_info->timeout[0]) { 179606bd2bdfSYi-Hung Wei if (nla_put_string(skb, OVS_CT_ATTR_TIMEOUT, ct_info->timeout)) 179706bd2bdfSYi-Hung Wei return -EMSGSIZE; 179806bd2bdfSYi-Hung Wei } 179912064551SJarno Rajahalme 18004806e975SFlorian Westphal #if IS_ENABLED(CONFIG_NF_NAT) 180105752523SJarno Rajahalme if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb)) 180205752523SJarno Rajahalme return -EMSGSIZE; 180305752523SJarno Rajahalme #endif 18047f8a436eSJoe Stringer nla_nest_end(skb, start); 18057f8a436eSJoe Stringer 18067f8a436eSJoe Stringer return 0; 18077f8a436eSJoe Stringer } 18087f8a436eSJoe Stringer 18097f8a436eSJoe Stringer void ovs_ct_free_action(const struct nlattr *a) 18107f8a436eSJoe Stringer { 18117f8a436eSJoe Stringer struct ovs_conntrack_info *ct_info = nla_data(a); 18127f8a436eSJoe Stringer 18132f3ab9f9SJoe Stringer __ovs_ct_free_action(ct_info); 18142f3ab9f9SJoe Stringer } 18152f3ab9f9SJoe Stringer 18162f3ab9f9SJoe Stringer static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info) 18172f3ab9f9SJoe Stringer { 1818fec9c271SFlavio Leitner if (ct_info->helper) { 1819f319ca65SGeert Uytterhoeven #if IS_ENABLED(CONFIG_NF_NAT) 1820fec9c271SFlavio Leitner if (ct_info->nat) 1821fec9c271SFlavio Leitner nf_nat_helper_put(ct_info->helper); 1822fec9c271SFlavio Leitner #endif 1823d91fc59cSLiping Zhang nf_conntrack_helper_put(ct_info->helper); 1824fec9c271SFlavio Leitner } 182506bd2bdfSYi-Hung Wei if (ct_info->ct) { 182606bd2bdfSYi-Hung Wei if (ct_info->timeout[0]) 182706bd2bdfSYi-Hung Wei nf_ct_destroy_timeout(ct_info->ct); 18286d670497SDan Carpenter nf_ct_tmpl_free(ct_info->ct); 182906bd2bdfSYi-Hung Wei } 18307f8a436eSJoe Stringer } 1831c2ac6673SJoe Stringer 183211efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 183311efd5cbSYi-Hung Wei static int ovs_ct_limit_init(struct net *net, struct ovs_net *ovs_net) 183411efd5cbSYi-Hung Wei { 183511efd5cbSYi-Hung Wei int i, err; 183611efd5cbSYi-Hung Wei 183711efd5cbSYi-Hung Wei ovs_net->ct_limit_info = kmalloc(sizeof(*ovs_net->ct_limit_info), 183811efd5cbSYi-Hung Wei GFP_KERNEL); 183911efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info) 184011efd5cbSYi-Hung Wei return -ENOMEM; 184111efd5cbSYi-Hung Wei 184211efd5cbSYi-Hung Wei ovs_net->ct_limit_info->default_limit = OVS_CT_LIMIT_DEFAULT; 184311efd5cbSYi-Hung Wei ovs_net->ct_limit_info->limits = 184411efd5cbSYi-Hung Wei kmalloc_array(CT_LIMIT_HASH_BUCKETS, sizeof(struct hlist_head), 184511efd5cbSYi-Hung Wei GFP_KERNEL); 184611efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info->limits) { 184711efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 184811efd5cbSYi-Hung Wei return -ENOMEM; 184911efd5cbSYi-Hung Wei } 185011efd5cbSYi-Hung Wei 185111efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; i++) 185211efd5cbSYi-Hung Wei INIT_HLIST_HEAD(&ovs_net->ct_limit_info->limits[i]); 185311efd5cbSYi-Hung Wei 185411efd5cbSYi-Hung Wei ovs_net->ct_limit_info->data = 185511efd5cbSYi-Hung Wei nf_conncount_init(net, NFPROTO_INET, sizeof(u32)); 185611efd5cbSYi-Hung Wei 185711efd5cbSYi-Hung Wei if (IS_ERR(ovs_net->ct_limit_info->data)) { 185811efd5cbSYi-Hung Wei err = PTR_ERR(ovs_net->ct_limit_info->data); 185911efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info->limits); 186011efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 186111efd5cbSYi-Hung Wei pr_err("openvswitch: failed to init nf_conncount %d\n", err); 186211efd5cbSYi-Hung Wei return err; 186311efd5cbSYi-Hung Wei } 186411efd5cbSYi-Hung Wei return 0; 186511efd5cbSYi-Hung Wei } 186611efd5cbSYi-Hung Wei 186711efd5cbSYi-Hung Wei static void ovs_ct_limit_exit(struct net *net, struct ovs_net *ovs_net) 186811efd5cbSYi-Hung Wei { 186911efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info = ovs_net->ct_limit_info; 187011efd5cbSYi-Hung Wei int i; 187111efd5cbSYi-Hung Wei 187211efd5cbSYi-Hung Wei nf_conncount_destroy(net, NFPROTO_INET, info->data); 187311efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 187411efd5cbSYi-Hung Wei struct hlist_head *head = &info->limits[i]; 187511efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 187611efd5cbSYi-Hung Wei 187711efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) 187811efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 187911efd5cbSYi-Hung Wei } 188011efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info->limits); 188111efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 188211efd5cbSYi-Hung Wei } 188311efd5cbSYi-Hung Wei 188411efd5cbSYi-Hung Wei static struct sk_buff * 188511efd5cbSYi-Hung Wei ovs_ct_limit_cmd_reply_start(struct genl_info *info, u8 cmd, 188611efd5cbSYi-Hung Wei struct ovs_header **ovs_reply_header) 188711efd5cbSYi-Hung Wei { 188811efd5cbSYi-Hung Wei struct ovs_header *ovs_header = info->userhdr; 188911efd5cbSYi-Hung Wei struct sk_buff *skb; 189011efd5cbSYi-Hung Wei 189111efd5cbSYi-Hung Wei skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 189211efd5cbSYi-Hung Wei if (!skb) 189311efd5cbSYi-Hung Wei return ERR_PTR(-ENOMEM); 189411efd5cbSYi-Hung Wei 189511efd5cbSYi-Hung Wei *ovs_reply_header = genlmsg_put(skb, info->snd_portid, 189611efd5cbSYi-Hung Wei info->snd_seq, 189711efd5cbSYi-Hung Wei &dp_ct_limit_genl_family, 0, cmd); 189811efd5cbSYi-Hung Wei 189911efd5cbSYi-Hung Wei if (!*ovs_reply_header) { 190011efd5cbSYi-Hung Wei nlmsg_free(skb); 190111efd5cbSYi-Hung Wei return ERR_PTR(-EMSGSIZE); 190211efd5cbSYi-Hung Wei } 190311efd5cbSYi-Hung Wei (*ovs_reply_header)->dp_ifindex = ovs_header->dp_ifindex; 190411efd5cbSYi-Hung Wei 190511efd5cbSYi-Hung Wei return skb; 190611efd5cbSYi-Hung Wei } 190711efd5cbSYi-Hung Wei 190811efd5cbSYi-Hung Wei static bool check_zone_id(int zone_id, u16 *pzone) 190911efd5cbSYi-Hung Wei { 191011efd5cbSYi-Hung Wei if (zone_id >= 0 && zone_id <= 65535) { 191111efd5cbSYi-Hung Wei *pzone = (u16)zone_id; 191211efd5cbSYi-Hung Wei return true; 191311efd5cbSYi-Hung Wei } 191411efd5cbSYi-Hung Wei return false; 191511efd5cbSYi-Hung Wei } 191611efd5cbSYi-Hung Wei 191711efd5cbSYi-Hung Wei static int ovs_ct_limit_set_zone_limit(struct nlattr *nla_zone_limit, 191811efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 191911efd5cbSYi-Hung Wei { 192011efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 192111efd5cbSYi-Hung Wei int rem; 192211efd5cbSYi-Hung Wei u16 zone; 192311efd5cbSYi-Hung Wei 192411efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 192511efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 192611efd5cbSYi-Hung Wei 192711efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 192811efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 192911efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 193011efd5cbSYi-Hung Wei ovs_lock(); 193111efd5cbSYi-Hung Wei info->default_limit = zone_limit->limit; 193211efd5cbSYi-Hung Wei ovs_unlock(); 193311efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 193411efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 193511efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 193611efd5cbSYi-Hung Wei } else { 193711efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 193811efd5cbSYi-Hung Wei 193911efd5cbSYi-Hung Wei ct_limit = kmalloc(sizeof(*ct_limit), GFP_KERNEL); 194011efd5cbSYi-Hung Wei if (!ct_limit) 194111efd5cbSYi-Hung Wei return -ENOMEM; 194211efd5cbSYi-Hung Wei 194311efd5cbSYi-Hung Wei ct_limit->zone = zone; 194411efd5cbSYi-Hung Wei ct_limit->limit = zone_limit->limit; 194511efd5cbSYi-Hung Wei 194611efd5cbSYi-Hung Wei ovs_lock(); 194711efd5cbSYi-Hung Wei ct_limit_set(info, ct_limit); 194811efd5cbSYi-Hung Wei ovs_unlock(); 194911efd5cbSYi-Hung Wei } 195011efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 195111efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 195211efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 195311efd5cbSYi-Hung Wei } 195411efd5cbSYi-Hung Wei 195511efd5cbSYi-Hung Wei if (rem) 195611efd5cbSYi-Hung Wei OVS_NLERR(true, "set zone limit has %d unknown bytes", rem); 195711efd5cbSYi-Hung Wei 195811efd5cbSYi-Hung Wei return 0; 195911efd5cbSYi-Hung Wei } 196011efd5cbSYi-Hung Wei 196111efd5cbSYi-Hung Wei static int ovs_ct_limit_del_zone_limit(struct nlattr *nla_zone_limit, 196211efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 196311efd5cbSYi-Hung Wei { 196411efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 196511efd5cbSYi-Hung Wei int rem; 196611efd5cbSYi-Hung Wei u16 zone; 196711efd5cbSYi-Hung Wei 196811efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 196911efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 197011efd5cbSYi-Hung Wei 197111efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 197211efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 197311efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 197411efd5cbSYi-Hung Wei ovs_lock(); 197511efd5cbSYi-Hung Wei info->default_limit = OVS_CT_LIMIT_DEFAULT; 197611efd5cbSYi-Hung Wei ovs_unlock(); 197711efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 197811efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 197911efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 198011efd5cbSYi-Hung Wei } else { 198111efd5cbSYi-Hung Wei ovs_lock(); 198211efd5cbSYi-Hung Wei ct_limit_del(info, zone); 198311efd5cbSYi-Hung Wei ovs_unlock(); 198411efd5cbSYi-Hung Wei } 198511efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 198611efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 198711efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 198811efd5cbSYi-Hung Wei } 198911efd5cbSYi-Hung Wei 199011efd5cbSYi-Hung Wei if (rem) 199111efd5cbSYi-Hung Wei OVS_NLERR(true, "del zone limit has %d unknown bytes", rem); 199211efd5cbSYi-Hung Wei 199311efd5cbSYi-Hung Wei return 0; 199411efd5cbSYi-Hung Wei } 199511efd5cbSYi-Hung Wei 199611efd5cbSYi-Hung Wei static int ovs_ct_limit_get_default_limit(struct ovs_ct_limit_info *info, 199711efd5cbSYi-Hung Wei struct sk_buff *reply) 199811efd5cbSYi-Hung Wei { 199911efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 200011efd5cbSYi-Hung Wei int err; 200111efd5cbSYi-Hung Wei 200211efd5cbSYi-Hung Wei zone_limit.zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE; 200311efd5cbSYi-Hung Wei zone_limit.limit = info->default_limit; 200411efd5cbSYi-Hung Wei err = nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 200511efd5cbSYi-Hung Wei if (err) 200611efd5cbSYi-Hung Wei return err; 200711efd5cbSYi-Hung Wei 200811efd5cbSYi-Hung Wei return 0; 200911efd5cbSYi-Hung Wei } 201011efd5cbSYi-Hung Wei 201111efd5cbSYi-Hung Wei static int __ovs_ct_limit_get_zone_limit(struct net *net, 201211efd5cbSYi-Hung Wei struct nf_conncount_data *data, 201311efd5cbSYi-Hung Wei u16 zone_id, u32 limit, 201411efd5cbSYi-Hung Wei struct sk_buff *reply) 201511efd5cbSYi-Hung Wei { 201611efd5cbSYi-Hung Wei struct nf_conntrack_zone ct_zone; 201711efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 201811efd5cbSYi-Hung Wei u32 conncount_key = zone_id; 201911efd5cbSYi-Hung Wei 202011efd5cbSYi-Hung Wei zone_limit.zone_id = zone_id; 202111efd5cbSYi-Hung Wei zone_limit.limit = limit; 202211efd5cbSYi-Hung Wei nf_ct_zone_init(&ct_zone, zone_id, NF_CT_DEFAULT_ZONE_DIR, 0); 202311efd5cbSYi-Hung Wei 202411efd5cbSYi-Hung Wei zone_limit.count = nf_conncount_count(net, data, &conncount_key, NULL, 202511efd5cbSYi-Hung Wei &ct_zone); 202611efd5cbSYi-Hung Wei return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 202711efd5cbSYi-Hung Wei } 202811efd5cbSYi-Hung Wei 202911efd5cbSYi-Hung Wei static int ovs_ct_limit_get_zone_limit(struct net *net, 203011efd5cbSYi-Hung Wei struct nlattr *nla_zone_limit, 203111efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 203211efd5cbSYi-Hung Wei struct sk_buff *reply) 203311efd5cbSYi-Hung Wei { 203411efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 203511efd5cbSYi-Hung Wei int rem, err; 203611efd5cbSYi-Hung Wei u32 limit; 203711efd5cbSYi-Hung Wei u16 zone; 203811efd5cbSYi-Hung Wei 203911efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 204011efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 204111efd5cbSYi-Hung Wei 204211efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 204311efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 204411efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 204511efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 204611efd5cbSYi-Hung Wei if (err) 204711efd5cbSYi-Hung Wei return err; 204811efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id(zone_limit->zone_id, 204911efd5cbSYi-Hung Wei &zone))) { 205011efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 205111efd5cbSYi-Hung Wei } else { 205211efd5cbSYi-Hung Wei rcu_read_lock(); 205311efd5cbSYi-Hung Wei limit = ct_limit_get(info, zone); 205411efd5cbSYi-Hung Wei rcu_read_unlock(); 205511efd5cbSYi-Hung Wei 205611efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit( 205711efd5cbSYi-Hung Wei net, info->data, zone, limit, reply); 205811efd5cbSYi-Hung Wei if (err) 205911efd5cbSYi-Hung Wei return err; 206011efd5cbSYi-Hung Wei } 206111efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 206211efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 206311efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 206411efd5cbSYi-Hung Wei } 206511efd5cbSYi-Hung Wei 206611efd5cbSYi-Hung Wei if (rem) 206711efd5cbSYi-Hung Wei OVS_NLERR(true, "get zone limit has %d unknown bytes", rem); 206811efd5cbSYi-Hung Wei 206911efd5cbSYi-Hung Wei return 0; 207011efd5cbSYi-Hung Wei } 207111efd5cbSYi-Hung Wei 207211efd5cbSYi-Hung Wei static int ovs_ct_limit_get_all_zone_limit(struct net *net, 207311efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 207411efd5cbSYi-Hung Wei struct sk_buff *reply) 207511efd5cbSYi-Hung Wei { 207611efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 207711efd5cbSYi-Hung Wei struct hlist_head *head; 207811efd5cbSYi-Hung Wei int i, err = 0; 207911efd5cbSYi-Hung Wei 208011efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 208111efd5cbSYi-Hung Wei if (err) 208211efd5cbSYi-Hung Wei return err; 208311efd5cbSYi-Hung Wei 208411efd5cbSYi-Hung Wei rcu_read_lock(); 208511efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 208611efd5cbSYi-Hung Wei head = &info->limits[i]; 208711efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 208811efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit(net, info->data, 208911efd5cbSYi-Hung Wei ct_limit->zone, ct_limit->limit, reply); 209011efd5cbSYi-Hung Wei if (err) 209111efd5cbSYi-Hung Wei goto exit_err; 209211efd5cbSYi-Hung Wei } 209311efd5cbSYi-Hung Wei } 209411efd5cbSYi-Hung Wei 209511efd5cbSYi-Hung Wei exit_err: 209611efd5cbSYi-Hung Wei rcu_read_unlock(); 209711efd5cbSYi-Hung Wei return err; 209811efd5cbSYi-Hung Wei } 209911efd5cbSYi-Hung Wei 210011efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_set(struct sk_buff *skb, struct genl_info *info) 210111efd5cbSYi-Hung Wei { 210211efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 210311efd5cbSYi-Hung Wei struct sk_buff *reply; 210411efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 210511efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 210611efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 210711efd5cbSYi-Hung Wei int err; 210811efd5cbSYi-Hung Wei 210911efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_SET, 211011efd5cbSYi-Hung Wei &ovs_reply_header); 211111efd5cbSYi-Hung Wei if (IS_ERR(reply)) 211211efd5cbSYi-Hung Wei return PTR_ERR(reply); 211311efd5cbSYi-Hung Wei 211411efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 211511efd5cbSYi-Hung Wei err = -EINVAL; 211611efd5cbSYi-Hung Wei goto exit_err; 211711efd5cbSYi-Hung Wei } 211811efd5cbSYi-Hung Wei 211911efd5cbSYi-Hung Wei err = ovs_ct_limit_set_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 212011efd5cbSYi-Hung Wei ct_limit_info); 212111efd5cbSYi-Hung Wei if (err) 212211efd5cbSYi-Hung Wei goto exit_err; 212311efd5cbSYi-Hung Wei 212411efd5cbSYi-Hung Wei static_branch_enable(&ovs_ct_limit_enabled); 212511efd5cbSYi-Hung Wei 212611efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 212711efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 212811efd5cbSYi-Hung Wei 212911efd5cbSYi-Hung Wei exit_err: 213011efd5cbSYi-Hung Wei nlmsg_free(reply); 213111efd5cbSYi-Hung Wei return err; 213211efd5cbSYi-Hung Wei } 213311efd5cbSYi-Hung Wei 213411efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_del(struct sk_buff *skb, struct genl_info *info) 213511efd5cbSYi-Hung Wei { 213611efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 213711efd5cbSYi-Hung Wei struct sk_buff *reply; 213811efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 213911efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 214011efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 214111efd5cbSYi-Hung Wei int err; 214211efd5cbSYi-Hung Wei 214311efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_DEL, 214411efd5cbSYi-Hung Wei &ovs_reply_header); 214511efd5cbSYi-Hung Wei if (IS_ERR(reply)) 214611efd5cbSYi-Hung Wei return PTR_ERR(reply); 214711efd5cbSYi-Hung Wei 214811efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 214911efd5cbSYi-Hung Wei err = -EINVAL; 215011efd5cbSYi-Hung Wei goto exit_err; 215111efd5cbSYi-Hung Wei } 215211efd5cbSYi-Hung Wei 215311efd5cbSYi-Hung Wei err = ovs_ct_limit_del_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 215411efd5cbSYi-Hung Wei ct_limit_info); 215511efd5cbSYi-Hung Wei if (err) 215611efd5cbSYi-Hung Wei goto exit_err; 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_get(struct sk_buff *skb, struct genl_info *info) 216711efd5cbSYi-Hung Wei { 216811efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 216911efd5cbSYi-Hung Wei struct nlattr *nla_reply; 217011efd5cbSYi-Hung Wei struct sk_buff *reply; 217111efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 217211efd5cbSYi-Hung Wei struct net *net = sock_net(skb->sk); 217311efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 217411efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 217511efd5cbSYi-Hung Wei int err; 217611efd5cbSYi-Hung Wei 217711efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_GET, 217811efd5cbSYi-Hung Wei &ovs_reply_header); 217911efd5cbSYi-Hung Wei if (IS_ERR(reply)) 218011efd5cbSYi-Hung Wei return PTR_ERR(reply); 218111efd5cbSYi-Hung Wei 2182ae0be8deSMichal Kubecek nla_reply = nla_nest_start_noflag(reply, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); 2183ca965346SColin Ian King if (!nla_reply) { 2184ca965346SColin Ian King err = -EMSGSIZE; 2185ca965346SColin Ian King goto exit_err; 2186ca965346SColin Ian King } 218711efd5cbSYi-Hung Wei 218811efd5cbSYi-Hung Wei if (a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 218911efd5cbSYi-Hung Wei err = ovs_ct_limit_get_zone_limit( 219011efd5cbSYi-Hung Wei net, a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], ct_limit_info, 219111efd5cbSYi-Hung Wei reply); 219211efd5cbSYi-Hung Wei if (err) 219311efd5cbSYi-Hung Wei goto exit_err; 219411efd5cbSYi-Hung Wei } else { 219511efd5cbSYi-Hung Wei err = ovs_ct_limit_get_all_zone_limit(net, ct_limit_info, 219611efd5cbSYi-Hung Wei reply); 219711efd5cbSYi-Hung Wei if (err) 219811efd5cbSYi-Hung Wei goto exit_err; 219911efd5cbSYi-Hung Wei } 220011efd5cbSYi-Hung Wei 220111efd5cbSYi-Hung Wei nla_nest_end(reply, nla_reply); 220211efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 220311efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 220411efd5cbSYi-Hung Wei 220511efd5cbSYi-Hung Wei exit_err: 220611efd5cbSYi-Hung Wei nlmsg_free(reply); 220711efd5cbSYi-Hung Wei return err; 220811efd5cbSYi-Hung Wei } 220911efd5cbSYi-Hung Wei 221011efd5cbSYi-Hung Wei static struct genl_ops ct_limit_genl_ops[] = { 221111efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_SET, 2212ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 221311efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 221411efd5cbSYi-Hung Wei * privilege. */ 221511efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_set, 221611efd5cbSYi-Hung Wei }, 221711efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_DEL, 2218ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 221911efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 222011efd5cbSYi-Hung Wei * privilege. */ 222111efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_del, 222211efd5cbSYi-Hung Wei }, 222311efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_GET, 2224ef6243acSJohannes Berg .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 222511efd5cbSYi-Hung Wei .flags = 0, /* OK for unprivileged users. */ 222611efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_get, 222711efd5cbSYi-Hung Wei }, 222811efd5cbSYi-Hung Wei }; 222911efd5cbSYi-Hung Wei 223011efd5cbSYi-Hung Wei static const struct genl_multicast_group ovs_ct_limit_multicast_group = { 223111efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_MCGROUP, 223211efd5cbSYi-Hung Wei }; 223311efd5cbSYi-Hung Wei 223411efd5cbSYi-Hung Wei struct genl_family dp_ct_limit_genl_family __ro_after_init = { 223511efd5cbSYi-Hung Wei .hdrsize = sizeof(struct ovs_header), 223611efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_FAMILY, 223711efd5cbSYi-Hung Wei .version = OVS_CT_LIMIT_VERSION, 223811efd5cbSYi-Hung Wei .maxattr = OVS_CT_LIMIT_ATTR_MAX, 22393b0f31f2SJohannes Berg .policy = ct_limit_policy, 224011efd5cbSYi-Hung Wei .netnsok = true, 224111efd5cbSYi-Hung Wei .parallel_ops = true, 224211efd5cbSYi-Hung Wei .ops = ct_limit_genl_ops, 224311efd5cbSYi-Hung Wei .n_ops = ARRAY_SIZE(ct_limit_genl_ops), 224411efd5cbSYi-Hung Wei .mcgrps = &ovs_ct_limit_multicast_group, 224511efd5cbSYi-Hung Wei .n_mcgrps = 1, 224611efd5cbSYi-Hung Wei .module = THIS_MODULE, 224711efd5cbSYi-Hung Wei }; 224811efd5cbSYi-Hung Wei #endif 224911efd5cbSYi-Hung Wei 225011efd5cbSYi-Hung Wei int ovs_ct_init(struct net *net) 2251c2ac6673SJoe Stringer { 225233db4125SJoe Stringer unsigned int n_bits = sizeof(struct ovs_key_ct_labels) * BITS_PER_BYTE; 2253c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2254c2ac6673SJoe Stringer 2255adff6c65SFlorian Westphal if (nf_connlabels_get(net, n_bits - 1)) { 2256c2ac6673SJoe Stringer ovs_net->xt_label = false; 2257c2ac6673SJoe Stringer OVS_NLERR(true, "Failed to set connlabel length"); 2258c2ac6673SJoe Stringer } else { 2259c2ac6673SJoe Stringer ovs_net->xt_label = true; 2260c2ac6673SJoe Stringer } 226111efd5cbSYi-Hung Wei 226211efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 226311efd5cbSYi-Hung Wei return ovs_ct_limit_init(net, ovs_net); 226411efd5cbSYi-Hung Wei #else 226511efd5cbSYi-Hung Wei return 0; 226611efd5cbSYi-Hung Wei #endif 2267c2ac6673SJoe Stringer } 2268c2ac6673SJoe Stringer 2269c2ac6673SJoe Stringer void ovs_ct_exit(struct net *net) 2270c2ac6673SJoe Stringer { 2271c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2272c2ac6673SJoe Stringer 227311efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 227411efd5cbSYi-Hung Wei ovs_ct_limit_exit(net, ovs_net); 227511efd5cbSYi-Hung Wei #endif 227611efd5cbSYi-Hung Wei 2277c2ac6673SJoe Stringer if (ovs_net->xt_label) 2278c2ac6673SJoe Stringer nf_connlabels_put(net); 2279c2ac6673SJoe Stringer } 2280