17f8a436eSJoe Stringer /* 27f8a436eSJoe Stringer * Copyright (c) 2015 Nicira, Inc. 37f8a436eSJoe Stringer * 47f8a436eSJoe Stringer * This program is free software; you can redistribute it and/or 57f8a436eSJoe Stringer * modify it under the terms of version 2 of the GNU General Public 67f8a436eSJoe Stringer * License as published by the Free Software Foundation. 77f8a436eSJoe Stringer * 87f8a436eSJoe Stringer * This program is distributed in the hope that it will be useful, but 97f8a436eSJoe Stringer * WITHOUT ANY WARRANTY; without even the implied warranty of 107f8a436eSJoe Stringer * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 117f8a436eSJoe Stringer * General Public License for more details. 127f8a436eSJoe Stringer */ 137f8a436eSJoe Stringer 147f8a436eSJoe Stringer #include <linux/module.h> 157f8a436eSJoe Stringer #include <linux/openvswitch.h> 1605752523SJarno Rajahalme #include <linux/tcp.h> 1705752523SJarno Rajahalme #include <linux/udp.h> 1805752523SJarno Rajahalme #include <linux/sctp.h> 1911efd5cbSYi-Hung Wei #include <linux/static_key.h> 207f8a436eSJoe Stringer #include <net/ip.h> 2111efd5cbSYi-Hung Wei #include <net/genetlink.h> 227f8a436eSJoe Stringer #include <net/netfilter/nf_conntrack_core.h> 2311efd5cbSYi-Hung Wei #include <net/netfilter/nf_conntrack_count.h> 24cae3a262SJoe Stringer #include <net/netfilter/nf_conntrack_helper.h> 25c2ac6673SJoe Stringer #include <net/netfilter/nf_conntrack_labels.h> 2605752523SJarno Rajahalme #include <net/netfilter/nf_conntrack_seqadj.h> 277f8a436eSJoe Stringer #include <net/netfilter/nf_conntrack_zones.h> 287f8a436eSJoe Stringer #include <net/netfilter/ipv6/nf_defrag_ipv6.h> 297f8a436eSJoe Stringer 3005752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 3105752523SJarno Rajahalme #include <linux/netfilter/nf_nat.h> 3205752523SJarno Rajahalme #include <net/netfilter/nf_nat_core.h> 3305752523SJarno Rajahalme #include <net/netfilter/nf_nat_l3proto.h> 3405752523SJarno Rajahalme #endif 3505752523SJarno Rajahalme 367f8a436eSJoe Stringer #include "datapath.h" 377f8a436eSJoe Stringer #include "conntrack.h" 387f8a436eSJoe Stringer #include "flow.h" 397f8a436eSJoe Stringer #include "flow_netlink.h" 407f8a436eSJoe Stringer 417f8a436eSJoe Stringer struct ovs_ct_len_tbl { 4205752523SJarno Rajahalme int maxlen; 4305752523SJarno Rajahalme int minlen; 447f8a436eSJoe Stringer }; 457f8a436eSJoe Stringer 46182e3042SJoe Stringer /* Metadata mark for masked write to conntrack mark */ 47182e3042SJoe Stringer struct md_mark { 48182e3042SJoe Stringer u32 value; 49182e3042SJoe Stringer u32 mask; 50182e3042SJoe Stringer }; 51182e3042SJoe Stringer 52c2ac6673SJoe Stringer /* Metadata label for masked write to conntrack label. */ 5333db4125SJoe Stringer struct md_labels { 5433db4125SJoe Stringer struct ovs_key_ct_labels value; 5533db4125SJoe Stringer struct ovs_key_ct_labels mask; 56c2ac6673SJoe Stringer }; 57c2ac6673SJoe Stringer 5805752523SJarno Rajahalme enum ovs_ct_nat { 5905752523SJarno Rajahalme OVS_CT_NAT = 1 << 0, /* NAT for committed connections only. */ 6005752523SJarno Rajahalme OVS_CT_SRC_NAT = 1 << 1, /* Source NAT for NEW connections. */ 6105752523SJarno Rajahalme OVS_CT_DST_NAT = 1 << 2, /* Destination NAT for NEW connections. */ 6205752523SJarno Rajahalme }; 6305752523SJarno Rajahalme 647f8a436eSJoe Stringer /* Conntrack action context for execution. */ 657f8a436eSJoe Stringer struct ovs_conntrack_info { 66cae3a262SJoe Stringer struct nf_conntrack_helper *helper; 677f8a436eSJoe Stringer struct nf_conntrack_zone zone; 687f8a436eSJoe Stringer struct nf_conn *ct; 69ab38a7b5SJoe Stringer u8 commit : 1; 7005752523SJarno Rajahalme u8 nat : 3; /* enum ovs_ct_nat */ 71dd41d33fSJarno Rajahalme u8 force : 1; 7212064551SJarno Rajahalme u8 have_eventmask : 1; 737f8a436eSJoe Stringer u16 family; 7412064551SJarno Rajahalme u32 eventmask; /* Mask of 1 << IPCT_*. */ 75182e3042SJoe Stringer struct md_mark mark; 7633db4125SJoe Stringer struct md_labels labels; 7705752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 782eb0f624SThierry Du Tre struct nf_nat_range2 range; /* Only present for SRC NAT and DST NAT. */ 7905752523SJarno Rajahalme #endif 807f8a436eSJoe Stringer }; 817f8a436eSJoe Stringer 8211efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 8311efd5cbSYi-Hung Wei #define OVS_CT_LIMIT_UNLIMITED 0 8411efd5cbSYi-Hung Wei #define OVS_CT_LIMIT_DEFAULT OVS_CT_LIMIT_UNLIMITED 8511efd5cbSYi-Hung Wei #define CT_LIMIT_HASH_BUCKETS 512 8611efd5cbSYi-Hung Wei static DEFINE_STATIC_KEY_FALSE(ovs_ct_limit_enabled); 8711efd5cbSYi-Hung Wei 8811efd5cbSYi-Hung Wei struct ovs_ct_limit { 8911efd5cbSYi-Hung Wei /* Elements in ovs_ct_limit_info->limits hash table */ 9011efd5cbSYi-Hung Wei struct hlist_node hlist_node; 9111efd5cbSYi-Hung Wei struct rcu_head rcu; 9211efd5cbSYi-Hung Wei u16 zone; 9311efd5cbSYi-Hung Wei u32 limit; 9411efd5cbSYi-Hung Wei }; 9511efd5cbSYi-Hung Wei 9611efd5cbSYi-Hung Wei struct ovs_ct_limit_info { 9711efd5cbSYi-Hung Wei u32 default_limit; 9811efd5cbSYi-Hung Wei struct hlist_head *limits; 9911efd5cbSYi-Hung Wei struct nf_conncount_data *data; 10011efd5cbSYi-Hung Wei }; 10111efd5cbSYi-Hung Wei 10211efd5cbSYi-Hung Wei static const struct nla_policy ct_limit_policy[OVS_CT_LIMIT_ATTR_MAX + 1] = { 10311efd5cbSYi-Hung Wei [OVS_CT_LIMIT_ATTR_ZONE_LIMIT] = { .type = NLA_NESTED, }, 10411efd5cbSYi-Hung Wei }; 10511efd5cbSYi-Hung Wei #endif 10611efd5cbSYi-Hung Wei 10709aa98adSJarno Rajahalme static bool labels_nonzero(const struct ovs_key_ct_labels *labels); 10809aa98adSJarno Rajahalme 1092f3ab9f9SJoe Stringer static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info); 1102f3ab9f9SJoe Stringer 1117f8a436eSJoe Stringer static u16 key_to_nfproto(const struct sw_flow_key *key) 1127f8a436eSJoe Stringer { 1137f8a436eSJoe Stringer switch (ntohs(key->eth.type)) { 1147f8a436eSJoe Stringer case ETH_P_IP: 1157f8a436eSJoe Stringer return NFPROTO_IPV4; 1167f8a436eSJoe Stringer case ETH_P_IPV6: 1177f8a436eSJoe Stringer return NFPROTO_IPV6; 1187f8a436eSJoe Stringer default: 1197f8a436eSJoe Stringer return NFPROTO_UNSPEC; 1207f8a436eSJoe Stringer } 1217f8a436eSJoe Stringer } 1227f8a436eSJoe Stringer 1237f8a436eSJoe Stringer /* Map SKB connection state into the values used by flow definition. */ 1247f8a436eSJoe Stringer static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo) 1257f8a436eSJoe Stringer { 1267f8a436eSJoe Stringer u8 ct_state = OVS_CS_F_TRACKED; 1277f8a436eSJoe Stringer 1287f8a436eSJoe Stringer switch (ctinfo) { 1297f8a436eSJoe Stringer case IP_CT_ESTABLISHED_REPLY: 1307f8a436eSJoe Stringer case IP_CT_RELATED_REPLY: 1317f8a436eSJoe Stringer ct_state |= OVS_CS_F_REPLY_DIR; 1327f8a436eSJoe Stringer break; 1337f8a436eSJoe Stringer default: 1347f8a436eSJoe Stringer break; 1357f8a436eSJoe Stringer } 1367f8a436eSJoe Stringer 1377f8a436eSJoe Stringer switch (ctinfo) { 1387f8a436eSJoe Stringer case IP_CT_ESTABLISHED: 1397f8a436eSJoe Stringer case IP_CT_ESTABLISHED_REPLY: 1407f8a436eSJoe Stringer ct_state |= OVS_CS_F_ESTABLISHED; 1417f8a436eSJoe Stringer break; 1427f8a436eSJoe Stringer case IP_CT_RELATED: 1437f8a436eSJoe Stringer case IP_CT_RELATED_REPLY: 1447f8a436eSJoe Stringer ct_state |= OVS_CS_F_RELATED; 1457f8a436eSJoe Stringer break; 1467f8a436eSJoe Stringer case IP_CT_NEW: 1477f8a436eSJoe Stringer ct_state |= OVS_CS_F_NEW; 1487f8a436eSJoe Stringer break; 1497f8a436eSJoe Stringer default: 1507f8a436eSJoe Stringer break; 1517f8a436eSJoe Stringer } 1527f8a436eSJoe Stringer 1537f8a436eSJoe Stringer return ct_state; 1547f8a436eSJoe Stringer } 1557f8a436eSJoe Stringer 1560d5cdef8SJoe Stringer static u32 ovs_ct_get_mark(const struct nf_conn *ct) 1570d5cdef8SJoe Stringer { 1580d5cdef8SJoe Stringer #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 1590d5cdef8SJoe Stringer return ct ? ct->mark : 0; 1600d5cdef8SJoe Stringer #else 1610d5cdef8SJoe Stringer return 0; 1620d5cdef8SJoe Stringer #endif 1630d5cdef8SJoe Stringer } 1640d5cdef8SJoe Stringer 165b87cec38SJarno Rajahalme /* Guard against conntrack labels max size shrinking below 128 bits. */ 166b87cec38SJarno Rajahalme #if NF_CT_LABELS_MAX_SIZE < 16 167b87cec38SJarno Rajahalme #error NF_CT_LABELS_MAX_SIZE must be at least 16 bytes 168b87cec38SJarno Rajahalme #endif 169b87cec38SJarno Rajahalme 17033db4125SJoe Stringer static void ovs_ct_get_labels(const struct nf_conn *ct, 17133db4125SJoe Stringer struct ovs_key_ct_labels *labels) 172c2ac6673SJoe Stringer { 173c2ac6673SJoe Stringer struct nf_conn_labels *cl = ct ? nf_ct_labels_find(ct) : NULL; 174c2ac6673SJoe Stringer 175b87cec38SJarno Rajahalme if (cl) 176b87cec38SJarno Rajahalme memcpy(labels, cl->bits, OVS_CT_LABELS_LEN); 177b87cec38SJarno Rajahalme else 17833db4125SJoe Stringer memset(labels, 0, OVS_CT_LABELS_LEN); 179c2ac6673SJoe Stringer } 180c2ac6673SJoe Stringer 1819dd7f890SJarno Rajahalme static void __ovs_ct_update_key_orig_tp(struct sw_flow_key *key, 1829dd7f890SJarno Rajahalme const struct nf_conntrack_tuple *orig, 1839dd7f890SJarno Rajahalme u8 icmp_proto) 1849dd7f890SJarno Rajahalme { 185316d4d78SJarno Rajahalme key->ct_orig_proto = orig->dst.protonum; 1869dd7f890SJarno Rajahalme if (orig->dst.protonum == icmp_proto) { 1879dd7f890SJarno Rajahalme key->ct.orig_tp.src = htons(orig->dst.u.icmp.type); 1889dd7f890SJarno Rajahalme key->ct.orig_tp.dst = htons(orig->dst.u.icmp.code); 1899dd7f890SJarno Rajahalme } else { 1909dd7f890SJarno Rajahalme key->ct.orig_tp.src = orig->src.u.all; 1919dd7f890SJarno Rajahalme key->ct.orig_tp.dst = orig->dst.u.all; 1929dd7f890SJarno Rajahalme } 1939dd7f890SJarno Rajahalme } 1949dd7f890SJarno Rajahalme 1957f8a436eSJoe Stringer static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state, 196182e3042SJoe Stringer const struct nf_conntrack_zone *zone, 197182e3042SJoe Stringer const struct nf_conn *ct) 1987f8a436eSJoe Stringer { 199316d4d78SJarno Rajahalme key->ct_state = state; 200316d4d78SJarno Rajahalme key->ct_zone = zone->id; 2010d5cdef8SJoe Stringer key->ct.mark = ovs_ct_get_mark(ct); 20233db4125SJoe Stringer ovs_ct_get_labels(ct, &key->ct.labels); 2039dd7f890SJarno Rajahalme 2049dd7f890SJarno Rajahalme if (ct) { 2059dd7f890SJarno Rajahalme const struct nf_conntrack_tuple *orig; 2069dd7f890SJarno Rajahalme 2079dd7f890SJarno Rajahalme /* Use the master if we have one. */ 2089dd7f890SJarno Rajahalme if (ct->master) 2099dd7f890SJarno Rajahalme ct = ct->master; 2109dd7f890SJarno Rajahalme orig = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; 2119dd7f890SJarno Rajahalme 2129dd7f890SJarno Rajahalme /* IP version must match with the master connection. */ 2139dd7f890SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP) && 2149dd7f890SJarno Rajahalme nf_ct_l3num(ct) == NFPROTO_IPV4) { 2159dd7f890SJarno Rajahalme key->ipv4.ct_orig.src = orig->src.u3.ip; 2169dd7f890SJarno Rajahalme key->ipv4.ct_orig.dst = orig->dst.u3.ip; 2179dd7f890SJarno Rajahalme __ovs_ct_update_key_orig_tp(key, orig, IPPROTO_ICMP); 2189dd7f890SJarno Rajahalme return; 2199dd7f890SJarno Rajahalme } else if (key->eth.type == htons(ETH_P_IPV6) && 2209dd7f890SJarno Rajahalme !sw_flow_key_is_nd(key) && 2219dd7f890SJarno Rajahalme nf_ct_l3num(ct) == NFPROTO_IPV6) { 2229dd7f890SJarno Rajahalme key->ipv6.ct_orig.src = orig->src.u3.in6; 2239dd7f890SJarno Rajahalme key->ipv6.ct_orig.dst = orig->dst.u3.in6; 2249dd7f890SJarno Rajahalme __ovs_ct_update_key_orig_tp(key, orig, NEXTHDR_ICMP); 2259dd7f890SJarno Rajahalme return; 2269dd7f890SJarno Rajahalme } 2279dd7f890SJarno Rajahalme } 228316d4d78SJarno Rajahalme /* Clear 'ct_orig_proto' to mark the non-existence of conntrack 2299dd7f890SJarno Rajahalme * original direction key fields. 2309dd7f890SJarno Rajahalme */ 231316d4d78SJarno Rajahalme key->ct_orig_proto = 0; 2327f8a436eSJoe Stringer } 2337f8a436eSJoe Stringer 2345e17da63SJarno Rajahalme /* Update 'key' based on skb->_nfct. If 'post_ct' is true, then OVS has 23505752523SJarno Rajahalme * previously sent the packet to conntrack via the ct action. If 23605752523SJarno Rajahalme * 'keep_nat_flags' is true, the existing NAT flags retained, else they are 23705752523SJarno Rajahalme * initialized from the connection status. 2387f8a436eSJoe Stringer */ 2397f8a436eSJoe Stringer static void ovs_ct_update_key(const struct sk_buff *skb, 240d110986cSJoe Stringer const struct ovs_conntrack_info *info, 24105752523SJarno Rajahalme struct sw_flow_key *key, bool post_ct, 24205752523SJarno Rajahalme bool keep_nat_flags) 2437f8a436eSJoe Stringer { 2447f8a436eSJoe Stringer const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt; 2457f8a436eSJoe Stringer enum ip_conntrack_info ctinfo; 2467f8a436eSJoe Stringer struct nf_conn *ct; 2477f8a436eSJoe Stringer u8 state = 0; 2487f8a436eSJoe Stringer 2497f8a436eSJoe Stringer ct = nf_ct_get(skb, &ctinfo); 2507f8a436eSJoe Stringer if (ct) { 2517f8a436eSJoe Stringer state = ovs_ct_get_state(ctinfo); 2529f13ded8SJarno Rajahalme /* All unconfirmed entries are NEW connections. */ 2534f0909eeSJoe Stringer if (!nf_ct_is_confirmed(ct)) 2544f0909eeSJoe Stringer state |= OVS_CS_F_NEW; 2559f13ded8SJarno Rajahalme /* OVS persists the related flag for the duration of the 2569f13ded8SJarno Rajahalme * connection. 2579f13ded8SJarno Rajahalme */ 2587f8a436eSJoe Stringer if (ct->master) 2597f8a436eSJoe Stringer state |= OVS_CS_F_RELATED; 26005752523SJarno Rajahalme if (keep_nat_flags) { 261316d4d78SJarno Rajahalme state |= key->ct_state & OVS_CS_F_NAT_MASK; 26205752523SJarno Rajahalme } else { 26305752523SJarno Rajahalme if (ct->status & IPS_SRC_NAT) 26405752523SJarno Rajahalme state |= OVS_CS_F_SRC_NAT; 26505752523SJarno Rajahalme if (ct->status & IPS_DST_NAT) 26605752523SJarno Rajahalme state |= OVS_CS_F_DST_NAT; 26705752523SJarno Rajahalme } 2687f8a436eSJoe Stringer zone = nf_ct_zone(ct); 2697f8a436eSJoe Stringer } else if (post_ct) { 2707f8a436eSJoe Stringer state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID; 271d110986cSJoe Stringer if (info) 272d110986cSJoe Stringer zone = &info->zone; 2737f8a436eSJoe Stringer } 274182e3042SJoe Stringer __ovs_ct_update_key(key, state, zone, ct); 2757f8a436eSJoe Stringer } 2767f8a436eSJoe Stringer 2779f13ded8SJarno Rajahalme /* This is called to initialize CT key fields possibly coming in from the local 2789f13ded8SJarno Rajahalme * stack. 2799f13ded8SJarno Rajahalme */ 2807f8a436eSJoe Stringer void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key) 2817f8a436eSJoe Stringer { 28205752523SJarno Rajahalme ovs_ct_update_key(skb, NULL, key, false, false); 2837f8a436eSJoe Stringer } 2847f8a436eSJoe Stringer 2859dd7f890SJarno Rajahalme #define IN6_ADDR_INITIALIZER(ADDR) \ 2869dd7f890SJarno Rajahalme { (ADDR).s6_addr32[0], (ADDR).s6_addr32[1], \ 2879dd7f890SJarno Rajahalme (ADDR).s6_addr32[2], (ADDR).s6_addr32[3] } 2889dd7f890SJarno Rajahalme 2899dd7f890SJarno Rajahalme int ovs_ct_put_key(const struct sw_flow_key *swkey, 2909dd7f890SJarno Rajahalme const struct sw_flow_key *output, struct sk_buff *skb) 2917f8a436eSJoe Stringer { 292316d4d78SJarno Rajahalme if (nla_put_u32(skb, OVS_KEY_ATTR_CT_STATE, output->ct_state)) 2937f8a436eSJoe Stringer return -EMSGSIZE; 2947f8a436eSJoe Stringer 2957f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 296316d4d78SJarno Rajahalme nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, output->ct_zone)) 2977f8a436eSJoe Stringer return -EMSGSIZE; 2987f8a436eSJoe Stringer 299182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3009dd7f890SJarno Rajahalme nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, output->ct.mark)) 301182e3042SJoe Stringer return -EMSGSIZE; 302182e3042SJoe Stringer 3039723e6abSValentin Rothberg if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3049dd7f890SJarno Rajahalme nla_put(skb, OVS_KEY_ATTR_CT_LABELS, sizeof(output->ct.labels), 3059dd7f890SJarno Rajahalme &output->ct.labels)) 306c2ac6673SJoe Stringer return -EMSGSIZE; 307c2ac6673SJoe Stringer 308316d4d78SJarno Rajahalme if (swkey->ct_orig_proto) { 3099dd7f890SJarno Rajahalme if (swkey->eth.type == htons(ETH_P_IP)) { 3109dd7f890SJarno Rajahalme struct ovs_key_ct_tuple_ipv4 orig = { 3119dd7f890SJarno Rajahalme output->ipv4.ct_orig.src, 3129dd7f890SJarno Rajahalme output->ipv4.ct_orig.dst, 3139dd7f890SJarno Rajahalme output->ct.orig_tp.src, 3149dd7f890SJarno Rajahalme output->ct.orig_tp.dst, 315316d4d78SJarno Rajahalme output->ct_orig_proto, 3169dd7f890SJarno Rajahalme }; 3179dd7f890SJarno Rajahalme if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4, 3189dd7f890SJarno Rajahalme sizeof(orig), &orig)) 3199dd7f890SJarno Rajahalme return -EMSGSIZE; 3209dd7f890SJarno Rajahalme } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 3219dd7f890SJarno Rajahalme struct ovs_key_ct_tuple_ipv6 orig = { 3229dd7f890SJarno Rajahalme IN6_ADDR_INITIALIZER(output->ipv6.ct_orig.src), 3239dd7f890SJarno Rajahalme IN6_ADDR_INITIALIZER(output->ipv6.ct_orig.dst), 3249dd7f890SJarno Rajahalme output->ct.orig_tp.src, 3259dd7f890SJarno Rajahalme output->ct.orig_tp.dst, 326316d4d78SJarno Rajahalme output->ct_orig_proto, 3279dd7f890SJarno Rajahalme }; 3289dd7f890SJarno Rajahalme if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6, 3299dd7f890SJarno Rajahalme sizeof(orig), &orig)) 3309dd7f890SJarno Rajahalme return -EMSGSIZE; 3319dd7f890SJarno Rajahalme } 3329dd7f890SJarno Rajahalme } 3339dd7f890SJarno Rajahalme 334182e3042SJoe Stringer return 0; 335182e3042SJoe Stringer } 336182e3042SJoe Stringer 3376ffcea79SJarno Rajahalme static int ovs_ct_set_mark(struct nf_conn *ct, struct sw_flow_key *key, 338182e3042SJoe Stringer u32 ct_mark, u32 mask) 339182e3042SJoe Stringer { 3400d5cdef8SJoe Stringer #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 341182e3042SJoe Stringer u32 new_mark; 342182e3042SJoe Stringer 343182e3042SJoe Stringer new_mark = ct_mark | (ct->mark & ~(mask)); 344182e3042SJoe Stringer if (ct->mark != new_mark) { 345182e3042SJoe Stringer ct->mark = new_mark; 346193e3096SJarno Rajahalme if (nf_ct_is_confirmed(ct)) 347182e3042SJoe Stringer nf_conntrack_event_cache(IPCT_MARK, ct); 348182e3042SJoe Stringer key->ct.mark = new_mark; 349182e3042SJoe Stringer } 350182e3042SJoe Stringer 3517f8a436eSJoe Stringer return 0; 3520d5cdef8SJoe Stringer #else 3530d5cdef8SJoe Stringer return -ENOTSUPP; 3540d5cdef8SJoe Stringer #endif 3557f8a436eSJoe Stringer } 3567f8a436eSJoe Stringer 3576ffcea79SJarno Rajahalme static struct nf_conn_labels *ovs_ct_get_conn_labels(struct nf_conn *ct) 358c2ac6673SJoe Stringer { 359c2ac6673SJoe Stringer struct nf_conn_labels *cl; 360c2ac6673SJoe Stringer 361c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 362c2ac6673SJoe Stringer if (!cl) { 363c2ac6673SJoe Stringer nf_ct_labels_ext_add(ct); 364c2ac6673SJoe Stringer cl = nf_ct_labels_find(ct); 365c2ac6673SJoe Stringer } 3666ffcea79SJarno Rajahalme 3676ffcea79SJarno Rajahalme return cl; 3686ffcea79SJarno Rajahalme } 3696ffcea79SJarno Rajahalme 3706ffcea79SJarno Rajahalme /* Initialize labels for a new, yet to be committed conntrack entry. Note that 3716ffcea79SJarno Rajahalme * since the new connection is not yet confirmed, and thus no-one else has 3722317c6b5SJarno Rajahalme * access to it's labels, we simply write them over. 3736ffcea79SJarno Rajahalme */ 3746ffcea79SJarno Rajahalme static int ovs_ct_init_labels(struct nf_conn *ct, struct sw_flow_key *key, 3756ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 3766ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 3776ffcea79SJarno Rajahalme { 37809aa98adSJarno Rajahalme struct nf_conn_labels *cl, *master_cl; 37909aa98adSJarno Rajahalme bool have_mask = labels_nonzero(mask); 38009aa98adSJarno Rajahalme 38109aa98adSJarno Rajahalme /* Inherit master's labels to the related connection? */ 38209aa98adSJarno Rajahalme master_cl = ct->master ? nf_ct_labels_find(ct->master) : NULL; 38309aa98adSJarno Rajahalme 38409aa98adSJarno Rajahalme if (!master_cl && !have_mask) 38509aa98adSJarno Rajahalme return 0; /* Nothing to do. */ 3866ffcea79SJarno Rajahalme 3876ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 388b87cec38SJarno Rajahalme if (!cl) 389c2ac6673SJoe Stringer return -ENOSPC; 390c2ac6673SJoe Stringer 39109aa98adSJarno Rajahalme /* Inherit the master's labels, if any. */ 39209aa98adSJarno Rajahalme if (master_cl) 39309aa98adSJarno Rajahalme *cl = *master_cl; 39409aa98adSJarno Rajahalme 39509aa98adSJarno Rajahalme if (have_mask) { 39609aa98adSJarno Rajahalme u32 *dst = (u32 *)cl->bits; 39709aa98adSJarno Rajahalme int i; 39809aa98adSJarno Rajahalme 3996ffcea79SJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 4006ffcea79SJarno Rajahalme dst[i] = (dst[i] & ~mask->ct_labels_32[i]) | 40109aa98adSJarno Rajahalme (labels->ct_labels_32[i] 40209aa98adSJarno Rajahalme & mask->ct_labels_32[i]); 40309aa98adSJarno Rajahalme } 4046ffcea79SJarno Rajahalme 4052317c6b5SJarno Rajahalme /* Labels are included in the IPCTNL_MSG_CT_NEW event only if the 406abd0a4f2SJarno Rajahalme * IPCT_LABEL bit is set in the event cache. 4072317c6b5SJarno Rajahalme */ 4082317c6b5SJarno Rajahalme nf_conntrack_event_cache(IPCT_LABEL, ct); 4092317c6b5SJarno Rajahalme 4106ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 4116ffcea79SJarno Rajahalme 4126ffcea79SJarno Rajahalme return 0; 4136ffcea79SJarno Rajahalme } 4146ffcea79SJarno Rajahalme 4156ffcea79SJarno Rajahalme static int ovs_ct_set_labels(struct nf_conn *ct, struct sw_flow_key *key, 4166ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *labels, 4176ffcea79SJarno Rajahalme const struct ovs_key_ct_labels *mask) 4186ffcea79SJarno Rajahalme { 4196ffcea79SJarno Rajahalme struct nf_conn_labels *cl; 4206ffcea79SJarno Rajahalme int err; 4216ffcea79SJarno Rajahalme 4226ffcea79SJarno Rajahalme cl = ovs_ct_get_conn_labels(ct); 4236ffcea79SJarno Rajahalme if (!cl) 4246ffcea79SJarno Rajahalme return -ENOSPC; 4256ffcea79SJarno Rajahalme 4266ffcea79SJarno Rajahalme err = nf_connlabels_replace(ct, labels->ct_labels_32, 427cb80d58fSJarno Rajahalme mask->ct_labels_32, 428cb80d58fSJarno Rajahalme OVS_CT_LABELS_LEN_32); 429c2ac6673SJoe Stringer if (err) 430c2ac6673SJoe Stringer return err; 431193e3096SJarno Rajahalme 4326ffcea79SJarno Rajahalme memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); 433c2ac6673SJoe Stringer 434c2ac6673SJoe Stringer return 0; 435c2ac6673SJoe Stringer } 436c2ac6673SJoe Stringer 437cae3a262SJoe Stringer /* 'skb' should already be pulled to nh_ofs. */ 438cae3a262SJoe Stringer static int ovs_ct_helper(struct sk_buff *skb, u16 proto) 439cae3a262SJoe Stringer { 440cae3a262SJoe Stringer const struct nf_conntrack_helper *helper; 441cae3a262SJoe Stringer const struct nf_conn_help *help; 442cae3a262SJoe Stringer enum ip_conntrack_info ctinfo; 443cae3a262SJoe Stringer unsigned int protoff; 444cae3a262SJoe Stringer struct nf_conn *ct; 44505752523SJarno Rajahalme int err; 446cae3a262SJoe Stringer 447cae3a262SJoe Stringer ct = nf_ct_get(skb, &ctinfo); 448cae3a262SJoe Stringer if (!ct || ctinfo == IP_CT_RELATED_REPLY) 449cae3a262SJoe Stringer return NF_ACCEPT; 450cae3a262SJoe Stringer 451cae3a262SJoe Stringer help = nfct_help(ct); 452cae3a262SJoe Stringer if (!help) 453cae3a262SJoe Stringer return NF_ACCEPT; 454cae3a262SJoe Stringer 455cae3a262SJoe Stringer helper = rcu_dereference(help->helper); 456cae3a262SJoe Stringer if (!helper) 457cae3a262SJoe Stringer return NF_ACCEPT; 458cae3a262SJoe Stringer 459cae3a262SJoe Stringer switch (proto) { 460cae3a262SJoe Stringer case NFPROTO_IPV4: 461cae3a262SJoe Stringer protoff = ip_hdrlen(skb); 462cae3a262SJoe Stringer break; 463cae3a262SJoe Stringer case NFPROTO_IPV6: { 464cae3a262SJoe Stringer u8 nexthdr = ipv6_hdr(skb)->nexthdr; 465cae3a262SJoe Stringer __be16 frag_off; 466cc570605SJoe Stringer int ofs; 467cae3a262SJoe Stringer 468cc570605SJoe Stringer ofs = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr, 469cc570605SJoe Stringer &frag_off); 470cc570605SJoe Stringer if (ofs < 0 || (frag_off & htons(~0x7)) != 0) { 471cae3a262SJoe Stringer pr_debug("proto header not found\n"); 472cae3a262SJoe Stringer return NF_ACCEPT; 473cae3a262SJoe Stringer } 474cc570605SJoe Stringer protoff = ofs; 475cae3a262SJoe Stringer break; 476cae3a262SJoe Stringer } 477cae3a262SJoe Stringer default: 478cae3a262SJoe Stringer WARN_ONCE(1, "helper invoked on non-IP family!"); 479cae3a262SJoe Stringer return NF_DROP; 480cae3a262SJoe Stringer } 481cae3a262SJoe Stringer 48205752523SJarno Rajahalme err = helper->help(skb, protoff, ct, ctinfo); 48305752523SJarno Rajahalme if (err != NF_ACCEPT) 48405752523SJarno Rajahalme return err; 48505752523SJarno Rajahalme 48605752523SJarno Rajahalme /* Adjust seqs after helper. This is needed due to some helpers (e.g., 48705752523SJarno Rajahalme * FTP with NAT) adusting the TCP payload size when mangling IP 48805752523SJarno Rajahalme * addresses and/or port numbers in the text-based control connection. 48905752523SJarno Rajahalme */ 49005752523SJarno Rajahalme if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) && 49105752523SJarno Rajahalme !nf_ct_seq_adjust(skb, ct, ctinfo, protoff)) 49205752523SJarno Rajahalme return NF_DROP; 49305752523SJarno Rajahalme return NF_ACCEPT; 494cae3a262SJoe Stringer } 495cae3a262SJoe Stringer 49674c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 49774c16618SJoe Stringer * value if 'skb' is freed. 49874c16618SJoe Stringer */ 4997f8a436eSJoe Stringer static int handle_fragments(struct net *net, struct sw_flow_key *key, 5007f8a436eSJoe Stringer u16 zone, struct sk_buff *skb) 5017f8a436eSJoe Stringer { 5027f8a436eSJoe Stringer struct ovs_skb_cb ovs_cb = *OVS_CB(skb); 503daaa7d64SFlorian Westphal int err; 5047f8a436eSJoe Stringer 5057f8a436eSJoe Stringer if (key->eth.type == htons(ETH_P_IP)) { 5067f8a436eSJoe Stringer enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; 5077f8a436eSJoe Stringer 5087f8a436eSJoe Stringer memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); 50919bcf9f2SEric W. Biederman err = ip_defrag(net, skb, user); 5107f8a436eSJoe Stringer if (err) 5117f8a436eSJoe Stringer return err; 5127f8a436eSJoe Stringer 5137f8a436eSJoe Stringer ovs_cb.mru = IPCB(skb)->frag_max_size; 5147f8a436eSJoe Stringer #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 51574c16618SJoe Stringer } else if (key->eth.type == htons(ETH_P_IPV6)) { 5167f8a436eSJoe Stringer enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; 5177f8a436eSJoe Stringer 5187f8a436eSJoe Stringer memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); 519daaa7d64SFlorian Westphal err = nf_ct_frag6_gather(net, skb, user); 520f92a80a9SDaniele Di Proietto if (err) { 521f92a80a9SDaniele Di Proietto if (err != -EINPROGRESS) 522f92a80a9SDaniele Di Proietto kfree_skb(skb); 523daaa7d64SFlorian Westphal return err; 524f92a80a9SDaniele Di Proietto } 5257f8a436eSJoe Stringer 526daaa7d64SFlorian Westphal key->ip.proto = ipv6_hdr(skb)->nexthdr; 5277f8a436eSJoe Stringer ovs_cb.mru = IP6CB(skb)->frag_max_size; 5287f8a436eSJoe Stringer #endif 5297f8a436eSJoe Stringer } else { 53074c16618SJoe Stringer kfree_skb(skb); 5317f8a436eSJoe Stringer return -EPFNOSUPPORT; 5327f8a436eSJoe Stringer } 5337f8a436eSJoe Stringer 5347f8a436eSJoe Stringer key->ip.frag = OVS_FRAG_TYPE_NONE; 5357f8a436eSJoe Stringer skb_clear_hash(skb); 5367f8a436eSJoe Stringer skb->ignore_df = 1; 5377f8a436eSJoe Stringer *OVS_CB(skb) = ovs_cb; 5387f8a436eSJoe Stringer 5397f8a436eSJoe Stringer return 0; 5407f8a436eSJoe Stringer } 5417f8a436eSJoe Stringer 5427f8a436eSJoe Stringer static struct nf_conntrack_expect * 5437f8a436eSJoe Stringer ovs_ct_expect_find(struct net *net, const struct nf_conntrack_zone *zone, 5447f8a436eSJoe Stringer u16 proto, const struct sk_buff *skb) 5457f8a436eSJoe Stringer { 5467f8a436eSJoe Stringer struct nf_conntrack_tuple tuple; 547cf5d7091SJarno Rajahalme struct nf_conntrack_expect *exp; 5487f8a436eSJoe Stringer 549a31f1adcSEric W. Biederman if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), proto, net, &tuple)) 5507f8a436eSJoe Stringer return NULL; 551cf5d7091SJarno Rajahalme 552cf5d7091SJarno Rajahalme exp = __nf_ct_expect_find(net, zone, &tuple); 553cf5d7091SJarno Rajahalme if (exp) { 554cf5d7091SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 555cf5d7091SJarno Rajahalme 556cf5d7091SJarno Rajahalme /* Delete existing conntrack entry, if it clashes with the 557cf5d7091SJarno Rajahalme * expectation. This can happen since conntrack ALGs do not 558cf5d7091SJarno Rajahalme * check for clashes between (new) expectations and existing 559cf5d7091SJarno Rajahalme * conntrack entries. nf_conntrack_in() will check the 560cf5d7091SJarno Rajahalme * expectations only if a conntrack entry can not be found, 561cf5d7091SJarno Rajahalme * which can lead to OVS finding the expectation (here) in the 562cf5d7091SJarno Rajahalme * init direction, but which will not be removed by the 563cf5d7091SJarno Rajahalme * nf_conntrack_in() call, if a matching conntrack entry is 564cf5d7091SJarno Rajahalme * found instead. In this case all init direction packets 565cf5d7091SJarno Rajahalme * would be reported as new related packets, while reply 566cf5d7091SJarno Rajahalme * direction packets would be reported as un-related 567cf5d7091SJarno Rajahalme * established packets. 568cf5d7091SJarno Rajahalme */ 569cf5d7091SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 570cf5d7091SJarno Rajahalme if (h) { 571cf5d7091SJarno Rajahalme struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 572cf5d7091SJarno Rajahalme 573cf5d7091SJarno Rajahalme nf_ct_delete(ct, 0, 0); 574cf5d7091SJarno Rajahalme nf_conntrack_put(&ct->ct_general); 575cf5d7091SJarno Rajahalme } 576cf5d7091SJarno Rajahalme } 577cf5d7091SJarno Rajahalme 578cf5d7091SJarno Rajahalme return exp; 5797f8a436eSJoe Stringer } 5807f8a436eSJoe Stringer 581289f2253SJarno Rajahalme /* This replicates logic from nf_conntrack_core.c that is not exported. */ 582289f2253SJarno Rajahalme static enum ip_conntrack_info 583289f2253SJarno Rajahalme ovs_ct_get_info(const struct nf_conntrack_tuple_hash *h) 584289f2253SJarno Rajahalme { 585289f2253SJarno Rajahalme const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); 586289f2253SJarno Rajahalme 587289f2253SJarno Rajahalme if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) 588289f2253SJarno Rajahalme return IP_CT_ESTABLISHED_REPLY; 589289f2253SJarno Rajahalme /* Once we've had two way comms, always ESTABLISHED. */ 590289f2253SJarno Rajahalme if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) 591289f2253SJarno Rajahalme return IP_CT_ESTABLISHED; 592289f2253SJarno Rajahalme if (test_bit(IPS_EXPECTED_BIT, &ct->status)) 593289f2253SJarno Rajahalme return IP_CT_RELATED; 594289f2253SJarno Rajahalme return IP_CT_NEW; 595289f2253SJarno Rajahalme } 596289f2253SJarno Rajahalme 597289f2253SJarno Rajahalme /* Find an existing connection which this packet belongs to without 598289f2253SJarno Rajahalme * re-attributing statistics or modifying the connection state. This allows an 5995e17da63SJarno Rajahalme * skb->_nfct lost due to an upcall to be recovered during actions execution. 600289f2253SJarno Rajahalme * 601289f2253SJarno Rajahalme * Must be called with rcu_read_lock. 602289f2253SJarno Rajahalme * 6035e17da63SJarno Rajahalme * On success, populates skb->_nfct and returns the connection. Returns NULL 6045e17da63SJarno Rajahalme * if there is no existing entry. 605289f2253SJarno Rajahalme */ 606289f2253SJarno Rajahalme static struct nf_conn * 607289f2253SJarno Rajahalme ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone, 6089ff464dbSJarno Rajahalme u8 l3num, struct sk_buff *skb, bool natted) 609289f2253SJarno Rajahalme { 610b3480fe0SFlorian Westphal const struct nf_conntrack_l3proto *l3proto; 611b3480fe0SFlorian Westphal const struct nf_conntrack_l4proto *l4proto; 612289f2253SJarno Rajahalme struct nf_conntrack_tuple tuple; 613289f2253SJarno Rajahalme struct nf_conntrack_tuple_hash *h; 614289f2253SJarno Rajahalme struct nf_conn *ct; 615289f2253SJarno Rajahalme unsigned int dataoff; 616289f2253SJarno Rajahalme u8 protonum; 617289f2253SJarno Rajahalme 618289f2253SJarno Rajahalme l3proto = __nf_ct_l3proto_find(l3num); 619289f2253SJarno Rajahalme if (l3proto->get_l4proto(skb, skb_network_offset(skb), &dataoff, 620289f2253SJarno Rajahalme &protonum) <= 0) { 621289f2253SJarno Rajahalme pr_debug("ovs_ct_find_existing: Can't get protonum\n"); 622289f2253SJarno Rajahalme return NULL; 623289f2253SJarno Rajahalme } 624289f2253SJarno Rajahalme l4proto = __nf_ct_l4proto_find(l3num, protonum); 625289f2253SJarno Rajahalme if (!nf_ct_get_tuple(skb, skb_network_offset(skb), dataoff, l3num, 626289f2253SJarno Rajahalme protonum, net, &tuple, l3proto, l4proto)) { 627289f2253SJarno Rajahalme pr_debug("ovs_ct_find_existing: Can't get tuple\n"); 628289f2253SJarno Rajahalme return NULL; 629289f2253SJarno Rajahalme } 630289f2253SJarno Rajahalme 6319ff464dbSJarno Rajahalme /* Must invert the tuple if skb has been transformed by NAT. */ 6329ff464dbSJarno Rajahalme if (natted) { 6339ff464dbSJarno Rajahalme struct nf_conntrack_tuple inverse; 6349ff464dbSJarno Rajahalme 6359ff464dbSJarno Rajahalme if (!nf_ct_invert_tuple(&inverse, &tuple, l3proto, l4proto)) { 6369ff464dbSJarno Rajahalme pr_debug("ovs_ct_find_existing: Inversion failed!\n"); 6379ff464dbSJarno Rajahalme return NULL; 6389ff464dbSJarno Rajahalme } 6399ff464dbSJarno Rajahalme tuple = inverse; 6409ff464dbSJarno Rajahalme } 6419ff464dbSJarno Rajahalme 642289f2253SJarno Rajahalme /* look for tuple match */ 643289f2253SJarno Rajahalme h = nf_conntrack_find_get(net, zone, &tuple); 644289f2253SJarno Rajahalme if (!h) 645289f2253SJarno Rajahalme return NULL; /* Not found. */ 646289f2253SJarno Rajahalme 647289f2253SJarno Rajahalme ct = nf_ct_tuplehash_to_ctrack(h); 648289f2253SJarno Rajahalme 6499ff464dbSJarno Rajahalme /* Inverted packet tuple matches the reverse direction conntrack tuple, 6509ff464dbSJarno Rajahalme * select the other tuplehash to get the right 'ctinfo' bits for this 6519ff464dbSJarno Rajahalme * packet. 6529ff464dbSJarno Rajahalme */ 6539ff464dbSJarno Rajahalme if (natted) 6549ff464dbSJarno Rajahalme h = &ct->tuplehash[!h->tuple.dst.dir]; 6559ff464dbSJarno Rajahalme 656c74454faSFlorian Westphal nf_ct_set(skb, ct, ovs_ct_get_info(h)); 657289f2253SJarno Rajahalme return ct; 658289f2253SJarno Rajahalme } 659289f2253SJarno Rajahalme 6608b97ac5bSGreg Rose static 6618b97ac5bSGreg Rose struct nf_conn *ovs_ct_executed(struct net *net, 6628b97ac5bSGreg Rose const struct sw_flow_key *key, 6638b97ac5bSGreg Rose const struct ovs_conntrack_info *info, 6648b97ac5bSGreg Rose struct sk_buff *skb, 6658b97ac5bSGreg Rose bool *ct_executed) 6668b97ac5bSGreg Rose { 6678b97ac5bSGreg Rose struct nf_conn *ct = NULL; 6688b97ac5bSGreg Rose 6698b97ac5bSGreg Rose /* If no ct, check if we have evidence that an existing conntrack entry 6708b97ac5bSGreg Rose * might be found for this skb. This happens when we lose a skb->_nfct 6718b97ac5bSGreg Rose * due to an upcall, or if the direction is being forced. If the 6728b97ac5bSGreg Rose * connection was not confirmed, it is not cached and needs to be run 6738b97ac5bSGreg Rose * through conntrack again. 6748b97ac5bSGreg Rose */ 6758b97ac5bSGreg Rose *ct_executed = (key->ct_state & OVS_CS_F_TRACKED) && 6768b97ac5bSGreg Rose !(key->ct_state & OVS_CS_F_INVALID) && 6778b97ac5bSGreg Rose (key->ct_zone == info->zone.id); 6788b97ac5bSGreg Rose 6798b97ac5bSGreg Rose if (*ct_executed || (!key->ct_state && info->force)) { 6808b97ac5bSGreg Rose ct = ovs_ct_find_existing(net, &info->zone, info->family, skb, 6818b97ac5bSGreg Rose !!(key->ct_state & 6828b97ac5bSGreg Rose OVS_CS_F_NAT_MASK)); 6838b97ac5bSGreg Rose } 6848b97ac5bSGreg Rose 6858b97ac5bSGreg Rose return ct; 6868b97ac5bSGreg Rose } 6878b97ac5bSGreg Rose 6885e17da63SJarno Rajahalme /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ 689289f2253SJarno Rajahalme static bool skb_nfct_cached(struct net *net, 690289f2253SJarno Rajahalme const struct sw_flow_key *key, 691289f2253SJarno Rajahalme const struct ovs_conntrack_info *info, 692289f2253SJarno Rajahalme struct sk_buff *skb) 6937f8a436eSJoe Stringer { 6947f8a436eSJoe Stringer enum ip_conntrack_info ctinfo; 6957f8a436eSJoe Stringer struct nf_conn *ct; 6968b97ac5bSGreg Rose bool ct_executed = true; 6977f8a436eSJoe Stringer 6987f8a436eSJoe Stringer ct = nf_ct_get(skb, &ctinfo); 6998b97ac5bSGreg Rose if (!ct) 7008b97ac5bSGreg Rose ct = ovs_ct_executed(net, key, info, skb, &ct_executed); 7018b97ac5bSGreg Rose 702dd41d33fSJarno Rajahalme if (ct) 703dd41d33fSJarno Rajahalme nf_ct_get(skb, &ctinfo); 7048b97ac5bSGreg Rose else 7057f8a436eSJoe Stringer return false; 7068b97ac5bSGreg Rose 7077f8a436eSJoe Stringer if (!net_eq(net, read_pnet(&ct->ct_net))) 7087f8a436eSJoe Stringer return false; 7097f8a436eSJoe Stringer if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct))) 7107f8a436eSJoe Stringer return false; 711cae3a262SJoe Stringer if (info->helper) { 712cae3a262SJoe Stringer struct nf_conn_help *help; 713cae3a262SJoe Stringer 714cae3a262SJoe Stringer help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER); 715cae3a262SJoe Stringer if (help && rcu_access_pointer(help->helper) != info->helper) 716cae3a262SJoe Stringer return false; 717cae3a262SJoe Stringer } 718dd41d33fSJarno Rajahalme /* Force conntrack entry direction to the current packet? */ 719dd41d33fSJarno Rajahalme if (info->force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { 720dd41d33fSJarno Rajahalme /* Delete the conntrack entry if confirmed, else just release 721dd41d33fSJarno Rajahalme * the reference. 722dd41d33fSJarno Rajahalme */ 723dd41d33fSJarno Rajahalme if (nf_ct_is_confirmed(ct)) 724dd41d33fSJarno Rajahalme nf_ct_delete(ct, 0, 0); 725b768b16dSJarno Rajahalme 726dd41d33fSJarno Rajahalme nf_conntrack_put(&ct->ct_general); 727dd41d33fSJarno Rajahalme nf_ct_set(skb, NULL, 0); 728dd41d33fSJarno Rajahalme return false; 729dd41d33fSJarno Rajahalme } 7307f8a436eSJoe Stringer 7318b97ac5bSGreg Rose return ct_executed; 7327f8a436eSJoe Stringer } 7337f8a436eSJoe Stringer 73405752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 73505752523SJarno Rajahalme /* Modelled after nf_nat_ipv[46]_fn(). 73605752523SJarno Rajahalme * range is only used for new, uninitialized NAT state. 73705752523SJarno Rajahalme * Returns either NF_ACCEPT or NF_DROP. 73805752523SJarno Rajahalme */ 73905752523SJarno Rajahalme static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct, 74005752523SJarno Rajahalme enum ip_conntrack_info ctinfo, 7412eb0f624SThierry Du Tre const struct nf_nat_range2 *range, 74205752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 74305752523SJarno Rajahalme { 74405752523SJarno Rajahalme int hooknum, nh_off, err = NF_ACCEPT; 74505752523SJarno Rajahalme 74605752523SJarno Rajahalme nh_off = skb_network_offset(skb); 74775f01a4cSLance Richardson skb_pull_rcsum(skb, nh_off); 74805752523SJarno Rajahalme 74905752523SJarno Rajahalme /* See HOOK2MANIP(). */ 75005752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) 75105752523SJarno Rajahalme hooknum = NF_INET_LOCAL_IN; /* Source NAT */ 75205752523SJarno Rajahalme else 75305752523SJarno Rajahalme hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */ 75405752523SJarno Rajahalme 75505752523SJarno Rajahalme switch (ctinfo) { 75605752523SJarno Rajahalme case IP_CT_RELATED: 75705752523SJarno Rajahalme case IP_CT_RELATED_REPLY: 75899b7248eSArnd Bergmann if (IS_ENABLED(CONFIG_NF_NAT_IPV4) && 75999b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IP) && 76005752523SJarno Rajahalme ip_hdr(skb)->protocol == IPPROTO_ICMP) { 76105752523SJarno Rajahalme if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo, 76205752523SJarno Rajahalme hooknum)) 76305752523SJarno Rajahalme err = NF_DROP; 76405752523SJarno Rajahalme goto push; 76599b7248eSArnd Bergmann } else if (IS_ENABLED(CONFIG_NF_NAT_IPV6) && 76699b7248eSArnd Bergmann skb->protocol == htons(ETH_P_IPV6)) { 76705752523SJarno Rajahalme __be16 frag_off; 76805752523SJarno Rajahalme u8 nexthdr = ipv6_hdr(skb)->nexthdr; 76905752523SJarno Rajahalme int hdrlen = ipv6_skip_exthdr(skb, 77005752523SJarno Rajahalme sizeof(struct ipv6hdr), 77105752523SJarno Rajahalme &nexthdr, &frag_off); 77205752523SJarno Rajahalme 77305752523SJarno Rajahalme if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) { 77405752523SJarno Rajahalme if (!nf_nat_icmpv6_reply_translation(skb, ct, 77505752523SJarno Rajahalme ctinfo, 77605752523SJarno Rajahalme hooknum, 77705752523SJarno Rajahalme hdrlen)) 77805752523SJarno Rajahalme err = NF_DROP; 77905752523SJarno Rajahalme goto push; 78005752523SJarno Rajahalme } 78105752523SJarno Rajahalme } 78205752523SJarno Rajahalme /* Non-ICMP, fall thru to initialize if needed. */ 783279badc2SGustavo A. R. Silva /* fall through */ 78405752523SJarno Rajahalme case IP_CT_NEW: 78505752523SJarno Rajahalme /* Seen it before? This can happen for loopback, retrans, 78605752523SJarno Rajahalme * or local packets. 78705752523SJarno Rajahalme */ 78805752523SJarno Rajahalme if (!nf_nat_initialized(ct, maniptype)) { 78905752523SJarno Rajahalme /* Initialize according to the NAT action. */ 79005752523SJarno Rajahalme err = (range && range->flags & NF_NAT_RANGE_MAP_IPS) 79105752523SJarno Rajahalme /* Action is set up to establish a new 79205752523SJarno Rajahalme * mapping. 79305752523SJarno Rajahalme */ 79405752523SJarno Rajahalme ? nf_nat_setup_info(ct, range, maniptype) 79505752523SJarno Rajahalme : nf_nat_alloc_null_binding(ct, hooknum); 79605752523SJarno Rajahalme if (err != NF_ACCEPT) 79705752523SJarno Rajahalme goto push; 79805752523SJarno Rajahalme } 79905752523SJarno Rajahalme break; 80005752523SJarno Rajahalme 80105752523SJarno Rajahalme case IP_CT_ESTABLISHED: 80205752523SJarno Rajahalme case IP_CT_ESTABLISHED_REPLY: 80305752523SJarno Rajahalme break; 80405752523SJarno Rajahalme 80505752523SJarno Rajahalme default: 80605752523SJarno Rajahalme err = NF_DROP; 80705752523SJarno Rajahalme goto push; 80805752523SJarno Rajahalme } 80905752523SJarno Rajahalme 81005752523SJarno Rajahalme err = nf_nat_packet(ct, ctinfo, hooknum, skb); 81105752523SJarno Rajahalme push: 81205752523SJarno Rajahalme skb_push(skb, nh_off); 81375f01a4cSLance Richardson skb_postpush_rcsum(skb, skb->data, nh_off); 81405752523SJarno Rajahalme 81505752523SJarno Rajahalme return err; 81605752523SJarno Rajahalme } 81705752523SJarno Rajahalme 81805752523SJarno Rajahalme static void ovs_nat_update_key(struct sw_flow_key *key, 81905752523SJarno Rajahalme const struct sk_buff *skb, 82005752523SJarno Rajahalme enum nf_nat_manip_type maniptype) 82105752523SJarno Rajahalme { 82205752523SJarno Rajahalme if (maniptype == NF_NAT_MANIP_SRC) { 82305752523SJarno Rajahalme __be16 src; 82405752523SJarno Rajahalme 825316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_SRC_NAT; 82605752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 82705752523SJarno Rajahalme key->ipv4.addr.src = ip_hdr(skb)->saddr; 82805752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 82905752523SJarno Rajahalme memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr, 83005752523SJarno Rajahalme sizeof(key->ipv6.addr.src)); 83105752523SJarno Rajahalme else 83205752523SJarno Rajahalme return; 83305752523SJarno Rajahalme 83405752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 83505752523SJarno Rajahalme src = udp_hdr(skb)->source; 83605752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 83705752523SJarno Rajahalme src = tcp_hdr(skb)->source; 83805752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 83905752523SJarno Rajahalme src = sctp_hdr(skb)->source; 84005752523SJarno Rajahalme else 84105752523SJarno Rajahalme return; 84205752523SJarno Rajahalme 84305752523SJarno Rajahalme key->tp.src = src; 84405752523SJarno Rajahalme } else { 84505752523SJarno Rajahalme __be16 dst; 84605752523SJarno Rajahalme 847316d4d78SJarno Rajahalme key->ct_state |= OVS_CS_F_DST_NAT; 84805752523SJarno Rajahalme if (key->eth.type == htons(ETH_P_IP)) 84905752523SJarno Rajahalme key->ipv4.addr.dst = ip_hdr(skb)->daddr; 85005752523SJarno Rajahalme else if (key->eth.type == htons(ETH_P_IPV6)) 85105752523SJarno Rajahalme memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr, 85205752523SJarno Rajahalme sizeof(key->ipv6.addr.dst)); 85305752523SJarno Rajahalme else 85405752523SJarno Rajahalme return; 85505752523SJarno Rajahalme 85605752523SJarno Rajahalme if (key->ip.proto == IPPROTO_UDP) 85705752523SJarno Rajahalme dst = udp_hdr(skb)->dest; 85805752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_TCP) 85905752523SJarno Rajahalme dst = tcp_hdr(skb)->dest; 86005752523SJarno Rajahalme else if (key->ip.proto == IPPROTO_SCTP) 86105752523SJarno Rajahalme dst = sctp_hdr(skb)->dest; 86205752523SJarno Rajahalme else 86305752523SJarno Rajahalme return; 86405752523SJarno Rajahalme 86505752523SJarno Rajahalme key->tp.dst = dst; 86605752523SJarno Rajahalme } 86705752523SJarno Rajahalme } 86805752523SJarno Rajahalme 86905752523SJarno Rajahalme /* Returns NF_DROP if the packet should be dropped, NF_ACCEPT otherwise. */ 87005752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 87105752523SJarno Rajahalme const struct ovs_conntrack_info *info, 87205752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 87305752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 87405752523SJarno Rajahalme { 87505752523SJarno Rajahalme enum nf_nat_manip_type maniptype; 87605752523SJarno Rajahalme int err; 87705752523SJarno Rajahalme 87805752523SJarno Rajahalme /* Add NAT extension if not confirmed yet. */ 87905752523SJarno Rajahalme if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct)) 88005752523SJarno Rajahalme return NF_ACCEPT; /* Can't NAT. */ 88105752523SJarno Rajahalme 88205752523SJarno Rajahalme /* Determine NAT type. 88305752523SJarno Rajahalme * Check if the NAT type can be deduced from the tracked connection. 8845745b0beSJarno Rajahalme * Make sure new expected connections (IP_CT_RELATED) are NATted only 8855745b0beSJarno Rajahalme * when committing. 88605752523SJarno Rajahalme */ 88705752523SJarno Rajahalme if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW && 88805752523SJarno Rajahalme ct->status & IPS_NAT_MASK && 8895745b0beSJarno Rajahalme (ctinfo != IP_CT_RELATED || info->commit)) { 89005752523SJarno Rajahalme /* NAT an established or related connection like before. */ 89105752523SJarno Rajahalme if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) 89205752523SJarno Rajahalme /* This is the REPLY direction for a connection 89305752523SJarno Rajahalme * for which NAT was applied in the forward 89405752523SJarno Rajahalme * direction. Do the reverse NAT. 89505752523SJarno Rajahalme */ 89605752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 89705752523SJarno Rajahalme ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC; 89805752523SJarno Rajahalme else 89905752523SJarno Rajahalme maniptype = ct->status & IPS_SRC_NAT 90005752523SJarno Rajahalme ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST; 90105752523SJarno Rajahalme } else if (info->nat & OVS_CT_SRC_NAT) { 90205752523SJarno Rajahalme maniptype = NF_NAT_MANIP_SRC; 90305752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 90405752523SJarno Rajahalme maniptype = NF_NAT_MANIP_DST; 90505752523SJarno Rajahalme } else { 90605752523SJarno Rajahalme return NF_ACCEPT; /* Connection is not NATed. */ 90705752523SJarno Rajahalme } 90805752523SJarno Rajahalme err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, maniptype); 90905752523SJarno Rajahalme 91005752523SJarno Rajahalme /* Mark NAT done if successful and update the flow key. */ 91105752523SJarno Rajahalme if (err == NF_ACCEPT) 91205752523SJarno Rajahalme ovs_nat_update_key(key, skb, maniptype); 91305752523SJarno Rajahalme 91405752523SJarno Rajahalme return err; 91505752523SJarno Rajahalme } 91605752523SJarno Rajahalme #else /* !CONFIG_NF_NAT_NEEDED */ 91705752523SJarno Rajahalme static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, 91805752523SJarno Rajahalme const struct ovs_conntrack_info *info, 91905752523SJarno Rajahalme struct sk_buff *skb, struct nf_conn *ct, 92005752523SJarno Rajahalme enum ip_conntrack_info ctinfo) 92105752523SJarno Rajahalme { 92205752523SJarno Rajahalme return NF_ACCEPT; 92305752523SJarno Rajahalme } 92405752523SJarno Rajahalme #endif 92505752523SJarno Rajahalme 9269f13ded8SJarno Rajahalme /* Pass 'skb' through conntrack in 'net', using zone configured in 'info', if 927394e910eSJarno Rajahalme * not done already. Update key with new CT state after passing the packet 928394e910eSJarno Rajahalme * through conntrack. 9295e17da63SJarno Rajahalme * Note that if the packet is deemed invalid by conntrack, skb->_nfct will be 9309f13ded8SJarno Rajahalme * set to NULL and 0 will be returned. 9319f13ded8SJarno Rajahalme */ 9324f0909eeSJoe Stringer static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 9337f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 9347f8a436eSJoe Stringer struct sk_buff *skb) 9357f8a436eSJoe Stringer { 9367f8a436eSJoe Stringer /* If we are recirculating packets to match on conntrack fields and 9377f8a436eSJoe Stringer * committing with a separate conntrack action, then we don't need to 9387f8a436eSJoe Stringer * actually run the packet through conntrack twice unless it's for a 9397f8a436eSJoe Stringer * different zone. 9407f8a436eSJoe Stringer */ 94128b6e0c1SJarno Rajahalme bool cached = skb_nfct_cached(net, key, info, skb); 94228b6e0c1SJarno Rajahalme enum ip_conntrack_info ctinfo; 94328b6e0c1SJarno Rajahalme struct nf_conn *ct; 94428b6e0c1SJarno Rajahalme 94528b6e0c1SJarno Rajahalme if (!cached) { 9467f8a436eSJoe Stringer struct nf_conn *tmpl = info->ct; 9475b6b9293SJarno Rajahalme int err; 9487f8a436eSJoe Stringer 9497f8a436eSJoe Stringer /* Associate skb with specified zone. */ 9507f8a436eSJoe Stringer if (tmpl) { 951cb9c6836SFlorian Westphal if (skb_nfct(skb)) 952cb9c6836SFlorian Westphal nf_conntrack_put(skb_nfct(skb)); 9537f8a436eSJoe Stringer nf_conntrack_get(&tmpl->ct_general); 954c74454faSFlorian Westphal nf_ct_set(skb, tmpl, IP_CT_NEW); 9557f8a436eSJoe Stringer } 9567f8a436eSJoe Stringer 9575b6b9293SJarno Rajahalme err = nf_conntrack_in(net, info->family, 9585b6b9293SJarno Rajahalme NF_INET_PRE_ROUTING, skb); 9595b6b9293SJarno Rajahalme if (err != NF_ACCEPT) 9607f8a436eSJoe Stringer return -ENOENT; 961cae3a262SJoe Stringer 96205752523SJarno Rajahalme /* Clear CT state NAT flags to mark that we have not yet done 96305752523SJarno Rajahalme * NAT after the nf_conntrack_in() call. We can actually clear 96405752523SJarno Rajahalme * the whole state, as it will be re-initialized below. 96505752523SJarno Rajahalme */ 966316d4d78SJarno Rajahalme key->ct_state = 0; 96705752523SJarno Rajahalme 96805752523SJarno Rajahalme /* Update the key, but keep the NAT flags. */ 96905752523SJarno Rajahalme ovs_ct_update_key(skb, info, key, true, true); 97005752523SJarno Rajahalme } 97105752523SJarno Rajahalme 97205752523SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 97305752523SJarno Rajahalme if (ct) { 97405752523SJarno Rajahalme /* Packets starting a new connection must be NATted before the 97505752523SJarno Rajahalme * helper, so that the helper knows about the NAT. We enforce 97605752523SJarno Rajahalme * this by delaying both NAT and helper calls for unconfirmed 97705752523SJarno Rajahalme * connections until the committing CT action. For later 97805752523SJarno Rajahalme * packets NAT and Helper may be called in either order. 97905752523SJarno Rajahalme * 98005752523SJarno Rajahalme * NAT will be done only if the CT action has NAT, and only 98105752523SJarno Rajahalme * once per packet (per zone), as guarded by the NAT bits in 982316d4d78SJarno Rajahalme * the key->ct_state. 98305752523SJarno Rajahalme */ 984316d4d78SJarno Rajahalme if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) && 98505752523SJarno Rajahalme (nf_ct_is_confirmed(ct) || info->commit) && 98605752523SJarno Rajahalme ovs_ct_nat(net, key, info, skb, ct, ctinfo) != NF_ACCEPT) { 98705752523SJarno Rajahalme return -EINVAL; 98828b6e0c1SJarno Rajahalme } 989394e910eSJarno Rajahalme 99016ec3d4fSJoe Stringer /* Userspace may decide to perform a ct lookup without a helper 99116ec3d4fSJoe Stringer * specified followed by a (recirculate and) commit with one. 99216ec3d4fSJoe Stringer * Therefore, for unconfirmed connections which we will commit, 99316ec3d4fSJoe Stringer * we need to attach the helper here. 99416ec3d4fSJoe Stringer */ 99516ec3d4fSJoe Stringer if (!nf_ct_is_confirmed(ct) && info->commit && 99616ec3d4fSJoe Stringer info->helper && !nfct_help(ct)) { 99716ec3d4fSJoe Stringer int err = __nf_ct_try_assign_helper(ct, info->ct, 99816ec3d4fSJoe Stringer GFP_ATOMIC); 99916ec3d4fSJoe Stringer if (err) 100016ec3d4fSJoe Stringer return err; 100116ec3d4fSJoe Stringer } 100216ec3d4fSJoe Stringer 100328b6e0c1SJarno Rajahalme /* Call the helper only if: 100405752523SJarno Rajahalme * - nf_conntrack_in() was executed above ("!cached") for a 100505752523SJarno Rajahalme * confirmed connection, or 100628b6e0c1SJarno Rajahalme * - When committing an unconfirmed connection. 100728b6e0c1SJarno Rajahalme */ 100805752523SJarno Rajahalme if ((nf_ct_is_confirmed(ct) ? !cached : info->commit) && 100928b6e0c1SJarno Rajahalme ovs_ct_helper(skb, info->family) != NF_ACCEPT) { 1010cae3a262SJoe Stringer return -EINVAL; 1011cae3a262SJoe Stringer } 101205752523SJarno Rajahalme } 10137f8a436eSJoe Stringer 10147f8a436eSJoe Stringer return 0; 10157f8a436eSJoe Stringer } 10167f8a436eSJoe Stringer 10177f8a436eSJoe Stringer /* Lookup connection and read fields into key. */ 10187f8a436eSJoe Stringer static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key, 10197f8a436eSJoe Stringer const struct ovs_conntrack_info *info, 10207f8a436eSJoe Stringer struct sk_buff *skb) 10217f8a436eSJoe Stringer { 10227f8a436eSJoe Stringer struct nf_conntrack_expect *exp; 10237f8a436eSJoe Stringer 10249f13ded8SJarno Rajahalme /* If we pass an expected packet through nf_conntrack_in() the 10259f13ded8SJarno Rajahalme * expectation is typically removed, but the packet could still be 10269f13ded8SJarno Rajahalme * lost in upcall processing. To prevent this from happening we 10279f13ded8SJarno Rajahalme * perform an explicit expectation lookup. Expected connections are 10289f13ded8SJarno Rajahalme * always new, and will be passed through conntrack only when they are 10299f13ded8SJarno Rajahalme * committed, as it is OK to remove the expectation at that time. 10309f13ded8SJarno Rajahalme */ 10317f8a436eSJoe Stringer exp = ovs_ct_expect_find(net, &info->zone, info->family, skb); 10327f8a436eSJoe Stringer if (exp) { 10337f8a436eSJoe Stringer u8 state; 10347f8a436eSJoe Stringer 103505752523SJarno Rajahalme /* NOTE: New connections are NATted and Helped only when 103605752523SJarno Rajahalme * committed, so we are not calling into NAT here. 103705752523SJarno Rajahalme */ 10387f8a436eSJoe Stringer state = OVS_CS_F_TRACKED | OVS_CS_F_NEW | OVS_CS_F_RELATED; 1039182e3042SJoe Stringer __ovs_ct_update_key(key, state, &info->zone, exp->master); 1040d913d3a7SSamuel Gauthier } else { 1041d913d3a7SSamuel Gauthier struct nf_conn *ct; 1042d913d3a7SSamuel Gauthier int err; 1043d913d3a7SSamuel Gauthier 1044d913d3a7SSamuel Gauthier err = __ovs_ct_lookup(net, key, info, skb); 1045d913d3a7SSamuel Gauthier if (err) 1046d913d3a7SSamuel Gauthier return err; 1047d913d3a7SSamuel Gauthier 1048cb9c6836SFlorian Westphal ct = (struct nf_conn *)skb_nfct(skb); 1049d913d3a7SSamuel Gauthier if (ct) 1050d913d3a7SSamuel Gauthier nf_ct_deliver_cached_events(ct); 1051d913d3a7SSamuel Gauthier } 10527f8a436eSJoe Stringer 10537f8a436eSJoe Stringer return 0; 10547f8a436eSJoe Stringer } 10557f8a436eSJoe Stringer 105633db4125SJoe Stringer static bool labels_nonzero(const struct ovs_key_ct_labels *labels) 1057c2ac6673SJoe Stringer { 1058c2ac6673SJoe Stringer size_t i; 1059c2ac6673SJoe Stringer 1060cb80d58fSJarno Rajahalme for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) 1061cb80d58fSJarno Rajahalme if (labels->ct_labels_32[i]) 1062c2ac6673SJoe Stringer return true; 1063c2ac6673SJoe Stringer 1064c2ac6673SJoe Stringer return false; 1065c2ac6673SJoe Stringer } 1066c2ac6673SJoe Stringer 106711efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 106811efd5cbSYi-Hung Wei static struct hlist_head *ct_limit_hash_bucket( 106911efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info, u16 zone) 107011efd5cbSYi-Hung Wei { 107111efd5cbSYi-Hung Wei return &info->limits[zone & (CT_LIMIT_HASH_BUCKETS - 1)]; 107211efd5cbSYi-Hung Wei } 107311efd5cbSYi-Hung Wei 107411efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 107511efd5cbSYi-Hung Wei static void ct_limit_set(const struct ovs_ct_limit_info *info, 107611efd5cbSYi-Hung Wei struct ovs_ct_limit *new_ct_limit) 107711efd5cbSYi-Hung Wei { 107811efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 107911efd5cbSYi-Hung Wei struct hlist_head *head; 108011efd5cbSYi-Hung Wei 108111efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, new_ct_limit->zone); 108211efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 108311efd5cbSYi-Hung Wei if (ct_limit->zone == new_ct_limit->zone) { 108411efd5cbSYi-Hung Wei hlist_replace_rcu(&ct_limit->hlist_node, 108511efd5cbSYi-Hung Wei &new_ct_limit->hlist_node); 108611efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 108711efd5cbSYi-Hung Wei return; 108811efd5cbSYi-Hung Wei } 108911efd5cbSYi-Hung Wei } 109011efd5cbSYi-Hung Wei 109111efd5cbSYi-Hung Wei hlist_add_head_rcu(&new_ct_limit->hlist_node, head); 109211efd5cbSYi-Hung Wei } 109311efd5cbSYi-Hung Wei 109411efd5cbSYi-Hung Wei /* Call with ovs_mutex */ 109511efd5cbSYi-Hung Wei static void ct_limit_del(const struct ovs_ct_limit_info *info, u16 zone) 109611efd5cbSYi-Hung Wei { 109711efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 109811efd5cbSYi-Hung Wei struct hlist_head *head; 109911efd5cbSYi-Hung Wei struct hlist_node *n; 110011efd5cbSYi-Hung Wei 110111efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, zone); 110211efd5cbSYi-Hung Wei hlist_for_each_entry_safe(ct_limit, n, head, hlist_node) { 110311efd5cbSYi-Hung Wei if (ct_limit->zone == zone) { 110411efd5cbSYi-Hung Wei hlist_del_rcu(&ct_limit->hlist_node); 110511efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 110611efd5cbSYi-Hung Wei return; 110711efd5cbSYi-Hung Wei } 110811efd5cbSYi-Hung Wei } 110911efd5cbSYi-Hung Wei } 111011efd5cbSYi-Hung Wei 111111efd5cbSYi-Hung Wei /* Call with RCU read lock */ 111211efd5cbSYi-Hung Wei static u32 ct_limit_get(const struct ovs_ct_limit_info *info, u16 zone) 111311efd5cbSYi-Hung Wei { 111411efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 111511efd5cbSYi-Hung Wei struct hlist_head *head; 111611efd5cbSYi-Hung Wei 111711efd5cbSYi-Hung Wei head = ct_limit_hash_bucket(info, zone); 111811efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 111911efd5cbSYi-Hung Wei if (ct_limit->zone == zone) 112011efd5cbSYi-Hung Wei return ct_limit->limit; 112111efd5cbSYi-Hung Wei } 112211efd5cbSYi-Hung Wei 112311efd5cbSYi-Hung Wei return info->default_limit; 112411efd5cbSYi-Hung Wei } 112511efd5cbSYi-Hung Wei 112611efd5cbSYi-Hung Wei static int ovs_ct_check_limit(struct net *net, 112711efd5cbSYi-Hung Wei const struct ovs_conntrack_info *info, 112811efd5cbSYi-Hung Wei const struct nf_conntrack_tuple *tuple) 112911efd5cbSYi-Hung Wei { 113011efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 113111efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 113211efd5cbSYi-Hung Wei u32 per_zone_limit, connections; 113311efd5cbSYi-Hung Wei u32 conncount_key; 113411efd5cbSYi-Hung Wei 113511efd5cbSYi-Hung Wei conncount_key = info->zone.id; 113611efd5cbSYi-Hung Wei 113711efd5cbSYi-Hung Wei per_zone_limit = ct_limit_get(ct_limit_info, info->zone.id); 113811efd5cbSYi-Hung Wei if (per_zone_limit == OVS_CT_LIMIT_UNLIMITED) 113911efd5cbSYi-Hung Wei return 0; 114011efd5cbSYi-Hung Wei 114111efd5cbSYi-Hung Wei connections = nf_conncount_count(net, ct_limit_info->data, 114211efd5cbSYi-Hung Wei &conncount_key, tuple, &info->zone); 114311efd5cbSYi-Hung Wei if (connections > per_zone_limit) 114411efd5cbSYi-Hung Wei return -ENOMEM; 114511efd5cbSYi-Hung Wei 114611efd5cbSYi-Hung Wei return 0; 114711efd5cbSYi-Hung Wei } 114811efd5cbSYi-Hung Wei #endif 114911efd5cbSYi-Hung Wei 11507d904c7bSJarno Rajahalme /* Lookup connection and confirm if unconfirmed. */ 11517d904c7bSJarno Rajahalme static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, 11527d904c7bSJarno Rajahalme const struct ovs_conntrack_info *info, 11537d904c7bSJarno Rajahalme struct sk_buff *skb) 11547d904c7bSJarno Rajahalme { 11556ffcea79SJarno Rajahalme enum ip_conntrack_info ctinfo; 11566ffcea79SJarno Rajahalme struct nf_conn *ct; 11577d904c7bSJarno Rajahalme int err; 11587d904c7bSJarno Rajahalme 11597d904c7bSJarno Rajahalme err = __ovs_ct_lookup(net, key, info, skb); 11607d904c7bSJarno Rajahalme if (err) 11617d904c7bSJarno Rajahalme return err; 11627d904c7bSJarno Rajahalme 11636ffcea79SJarno Rajahalme /* The connection could be invalid, in which case this is a no-op.*/ 11646ffcea79SJarno Rajahalme ct = nf_ct_get(skb, &ctinfo); 11656ffcea79SJarno Rajahalme if (!ct) 11666ffcea79SJarno Rajahalme return 0; 11676ffcea79SJarno Rajahalme 116811efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 116911efd5cbSYi-Hung Wei if (static_branch_unlikely(&ovs_ct_limit_enabled)) { 117011efd5cbSYi-Hung Wei if (!nf_ct_is_confirmed(ct)) { 117111efd5cbSYi-Hung Wei err = ovs_ct_check_limit(net, info, 117211efd5cbSYi-Hung Wei &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); 117311efd5cbSYi-Hung Wei if (err) { 117411efd5cbSYi-Hung Wei net_warn_ratelimited("openvswitch: zone: %u " 117511efd5cbSYi-Hung Wei "execeeds conntrack limit\n", 117611efd5cbSYi-Hung Wei info->zone.id); 117711efd5cbSYi-Hung Wei return err; 117811efd5cbSYi-Hung Wei } 117911efd5cbSYi-Hung Wei } 118011efd5cbSYi-Hung Wei } 118111efd5cbSYi-Hung Wei #endif 118211efd5cbSYi-Hung Wei 118312064551SJarno Rajahalme /* Set the conntrack event mask if given. NEW and DELETE events have 118412064551SJarno Rajahalme * their own groups, but the NFNLGRP_CONNTRACK_UPDATE group listener 118512064551SJarno Rajahalme * typically would receive many kinds of updates. Setting the event 118612064551SJarno Rajahalme * mask allows those events to be filtered. The set event mask will 118712064551SJarno Rajahalme * remain in effect for the lifetime of the connection unless changed 118812064551SJarno Rajahalme * by a further CT action with both the commit flag and the eventmask 118912064551SJarno Rajahalme * option. */ 119012064551SJarno Rajahalme if (info->have_eventmask) { 119112064551SJarno Rajahalme struct nf_conntrack_ecache *cache = nf_ct_ecache_find(ct); 119212064551SJarno Rajahalme 119312064551SJarno Rajahalme if (cache) 119412064551SJarno Rajahalme cache->ctmask = info->eventmask; 119512064551SJarno Rajahalme } 119612064551SJarno Rajahalme 11977d904c7bSJarno Rajahalme /* Apply changes before confirming the connection so that the initial 11987d904c7bSJarno Rajahalme * conntrack NEW netlink event carries the values given in the CT 11997d904c7bSJarno Rajahalme * action. 12007d904c7bSJarno Rajahalme */ 12017d904c7bSJarno Rajahalme if (info->mark.mask) { 12026ffcea79SJarno Rajahalme err = ovs_ct_set_mark(ct, key, info->mark.value, 12037d904c7bSJarno Rajahalme info->mark.mask); 12047d904c7bSJarno Rajahalme if (err) 12057d904c7bSJarno Rajahalme return err; 12067d904c7bSJarno Rajahalme } 120709aa98adSJarno Rajahalme if (!nf_ct_is_confirmed(ct)) { 12086ffcea79SJarno Rajahalme err = ovs_ct_init_labels(ct, key, &info->labels.value, 12096ffcea79SJarno Rajahalme &info->labels.mask); 121009aa98adSJarno Rajahalme if (err) 121109aa98adSJarno Rajahalme return err; 121209aa98adSJarno Rajahalme } else if (labels_nonzero(&info->labels.mask)) { 12136ffcea79SJarno Rajahalme err = ovs_ct_set_labels(ct, key, &info->labels.value, 12147d904c7bSJarno Rajahalme &info->labels.mask); 12157d904c7bSJarno Rajahalme if (err) 12167d904c7bSJarno Rajahalme return err; 12177d904c7bSJarno Rajahalme } 12187d904c7bSJarno Rajahalme /* This will take care of sending queued events even if the connection 12197d904c7bSJarno Rajahalme * is already confirmed. 12207d904c7bSJarno Rajahalme */ 12217d904c7bSJarno Rajahalme if (nf_conntrack_confirm(skb) != NF_ACCEPT) 12227d904c7bSJarno Rajahalme return -EINVAL; 12237d904c7bSJarno Rajahalme 12247d904c7bSJarno Rajahalme return 0; 12257d904c7bSJarno Rajahalme } 12267d904c7bSJarno Rajahalme 12279382fe71SEd Swierk /* Trim the skb to the length specified by the IP/IPv6 header, 12289382fe71SEd Swierk * removing any trailing lower-layer padding. This prepares the skb 12299382fe71SEd Swierk * for higher-layer processing that assumes skb->len excludes padding 12309382fe71SEd Swierk * (such as nf_ip_checksum). The caller needs to pull the skb to the 12319382fe71SEd Swierk * network header, and ensure ip_hdr/ipv6_hdr points to valid data. 12329382fe71SEd Swierk */ 12339382fe71SEd Swierk static int ovs_skb_network_trim(struct sk_buff *skb) 12349382fe71SEd Swierk { 12359382fe71SEd Swierk unsigned int len; 12369382fe71SEd Swierk int err; 12379382fe71SEd Swierk 12389382fe71SEd Swierk switch (skb->protocol) { 12399382fe71SEd Swierk case htons(ETH_P_IP): 12409382fe71SEd Swierk len = ntohs(ip_hdr(skb)->tot_len); 12419382fe71SEd Swierk break; 12429382fe71SEd Swierk case htons(ETH_P_IPV6): 12439382fe71SEd Swierk len = sizeof(struct ipv6hdr) 12449382fe71SEd Swierk + ntohs(ipv6_hdr(skb)->payload_len); 12459382fe71SEd Swierk break; 12469382fe71SEd Swierk default: 12479382fe71SEd Swierk len = skb->len; 12489382fe71SEd Swierk } 12499382fe71SEd Swierk 12509382fe71SEd Swierk err = pskb_trim_rcsum(skb, len); 12519382fe71SEd Swierk if (err) 12529382fe71SEd Swierk kfree_skb(skb); 12539382fe71SEd Swierk 12549382fe71SEd Swierk return err; 12559382fe71SEd Swierk } 12569382fe71SEd Swierk 125774c16618SJoe Stringer /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero 125874c16618SJoe Stringer * value if 'skb' is freed. 125974c16618SJoe Stringer */ 12607f8a436eSJoe Stringer int ovs_ct_execute(struct net *net, struct sk_buff *skb, 12617f8a436eSJoe Stringer struct sw_flow_key *key, 12627f8a436eSJoe Stringer const struct ovs_conntrack_info *info) 12637f8a436eSJoe Stringer { 12647f8a436eSJoe Stringer int nh_ofs; 12657f8a436eSJoe Stringer int err; 12667f8a436eSJoe Stringer 12677f8a436eSJoe Stringer /* The conntrack module expects to be working at L3. */ 12687f8a436eSJoe Stringer nh_ofs = skb_network_offset(skb); 126975f01a4cSLance Richardson skb_pull_rcsum(skb, nh_ofs); 12707f8a436eSJoe Stringer 12719382fe71SEd Swierk err = ovs_skb_network_trim(skb); 12729382fe71SEd Swierk if (err) 12739382fe71SEd Swierk return err; 12749382fe71SEd Swierk 12757f8a436eSJoe Stringer if (key->ip.frag != OVS_FRAG_TYPE_NONE) { 12767f8a436eSJoe Stringer err = handle_fragments(net, key, info->zone.id, skb); 12777f8a436eSJoe Stringer if (err) 12787f8a436eSJoe Stringer return err; 12797f8a436eSJoe Stringer } 12807f8a436eSJoe Stringer 1281ab38a7b5SJoe Stringer if (info->commit) 12827d904c7bSJarno Rajahalme err = ovs_ct_commit(net, key, info, skb); 12837f8a436eSJoe Stringer else 12847f8a436eSJoe Stringer err = ovs_ct_lookup(net, key, info, skb); 12857f8a436eSJoe Stringer 12867f8a436eSJoe Stringer skb_push(skb, nh_ofs); 128775f01a4cSLance Richardson skb_postpush_rcsum(skb, skb->data, nh_ofs); 128874c16618SJoe Stringer if (err) 128974c16618SJoe Stringer kfree_skb(skb); 12907f8a436eSJoe Stringer return err; 12917f8a436eSJoe Stringer } 12927f8a436eSJoe Stringer 1293b8226962SEric Garver int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key) 1294b8226962SEric Garver { 1295b8226962SEric Garver if (skb_nfct(skb)) { 1296b8226962SEric Garver nf_conntrack_put(skb_nfct(skb)); 1297b8226962SEric Garver nf_ct_set(skb, NULL, IP_CT_UNTRACKED); 1298b8226962SEric Garver ovs_ct_fill_key(skb, key); 1299b8226962SEric Garver } 1300b8226962SEric Garver 1301b8226962SEric Garver return 0; 1302b8226962SEric Garver } 1303b8226962SEric Garver 1304cae3a262SJoe Stringer static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name, 1305cae3a262SJoe Stringer const struct sw_flow_key *key, bool log) 1306cae3a262SJoe Stringer { 1307cae3a262SJoe Stringer struct nf_conntrack_helper *helper; 1308cae3a262SJoe Stringer struct nf_conn_help *help; 1309cae3a262SJoe Stringer 1310cae3a262SJoe Stringer helper = nf_conntrack_helper_try_module_get(name, info->family, 1311cae3a262SJoe Stringer key->ip.proto); 1312cae3a262SJoe Stringer if (!helper) { 1313cae3a262SJoe Stringer OVS_NLERR(log, "Unknown helper \"%s\"", name); 1314cae3a262SJoe Stringer return -EINVAL; 1315cae3a262SJoe Stringer } 1316cae3a262SJoe Stringer 1317cae3a262SJoe Stringer help = nf_ct_helper_ext_add(info->ct, helper, GFP_KERNEL); 1318cae3a262SJoe Stringer if (!help) { 1319d91fc59cSLiping Zhang nf_conntrack_helper_put(helper); 1320cae3a262SJoe Stringer return -ENOMEM; 1321cae3a262SJoe Stringer } 1322cae3a262SJoe Stringer 1323cae3a262SJoe Stringer rcu_assign_pointer(help->helper, helper); 1324cae3a262SJoe Stringer info->helper = helper; 1325cae3a262SJoe Stringer return 0; 1326cae3a262SJoe Stringer } 1327cae3a262SJoe Stringer 132805752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 132905752523SJarno Rajahalme static int parse_nat(const struct nlattr *attr, 133005752523SJarno Rajahalme struct ovs_conntrack_info *info, bool log) 133105752523SJarno Rajahalme { 133205752523SJarno Rajahalme struct nlattr *a; 133305752523SJarno Rajahalme int rem; 133405752523SJarno Rajahalme bool have_ip_max = false; 133505752523SJarno Rajahalme bool have_proto_max = false; 133605752523SJarno Rajahalme bool ip_vers = (info->family == NFPROTO_IPV6); 133705752523SJarno Rajahalme 133805752523SJarno Rajahalme nla_for_each_nested(a, attr, rem) { 133905752523SJarno Rajahalme static const int ovs_nat_attr_lens[OVS_NAT_ATTR_MAX + 1][2] = { 134005752523SJarno Rajahalme [OVS_NAT_ATTR_SRC] = {0, 0}, 134105752523SJarno Rajahalme [OVS_NAT_ATTR_DST] = {0, 0}, 134205752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MIN] = {sizeof(struct in_addr), 134305752523SJarno Rajahalme sizeof(struct in6_addr)}, 134405752523SJarno Rajahalme [OVS_NAT_ATTR_IP_MAX] = {sizeof(struct in_addr), 134505752523SJarno Rajahalme sizeof(struct in6_addr)}, 134605752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MIN] = {sizeof(u16), sizeof(u16)}, 134705752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_MAX] = {sizeof(u16), sizeof(u16)}, 134805752523SJarno Rajahalme [OVS_NAT_ATTR_PERSISTENT] = {0, 0}, 134905752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_HASH] = {0, 0}, 135005752523SJarno Rajahalme [OVS_NAT_ATTR_PROTO_RANDOM] = {0, 0}, 135105752523SJarno Rajahalme }; 135205752523SJarno Rajahalme int type = nla_type(a); 135305752523SJarno Rajahalme 135405752523SJarno Rajahalme if (type > OVS_NAT_ATTR_MAX) { 13550ed80da5SJoe Perches OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)", 135605752523SJarno Rajahalme type, OVS_NAT_ATTR_MAX); 135705752523SJarno Rajahalme return -EINVAL; 135805752523SJarno Rajahalme } 135905752523SJarno Rajahalme 136005752523SJarno Rajahalme if (nla_len(a) != ovs_nat_attr_lens[type][ip_vers]) { 13610ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)", 136205752523SJarno Rajahalme type, nla_len(a), 136305752523SJarno Rajahalme ovs_nat_attr_lens[type][ip_vers]); 136405752523SJarno Rajahalme return -EINVAL; 136505752523SJarno Rajahalme } 136605752523SJarno Rajahalme 136705752523SJarno Rajahalme switch (type) { 136805752523SJarno Rajahalme case OVS_NAT_ATTR_SRC: 136905752523SJarno Rajahalme case OVS_NAT_ATTR_DST: 137005752523SJarno Rajahalme if (info->nat) { 13710ed80da5SJoe Perches OVS_NLERR(log, "Only one type of NAT may be specified"); 137205752523SJarno Rajahalme return -ERANGE; 137305752523SJarno Rajahalme } 137405752523SJarno Rajahalme info->nat |= OVS_CT_NAT; 137505752523SJarno Rajahalme info->nat |= ((type == OVS_NAT_ATTR_SRC) 137605752523SJarno Rajahalme ? OVS_CT_SRC_NAT : OVS_CT_DST_NAT); 137705752523SJarno Rajahalme break; 137805752523SJarno Rajahalme 137905752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MIN: 1380ac71b46eSHaishuang Yan nla_memcpy(&info->range.min_addr, a, 1381ac71b46eSHaishuang Yan sizeof(info->range.min_addr)); 138205752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 138305752523SJarno Rajahalme break; 138405752523SJarno Rajahalme 138505752523SJarno Rajahalme case OVS_NAT_ATTR_IP_MAX: 138605752523SJarno Rajahalme have_ip_max = true; 138705752523SJarno Rajahalme nla_memcpy(&info->range.max_addr, a, 138805752523SJarno Rajahalme sizeof(info->range.max_addr)); 138905752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_MAP_IPS; 139005752523SJarno Rajahalme break; 139105752523SJarno Rajahalme 139205752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MIN: 139305752523SJarno Rajahalme info->range.min_proto.all = htons(nla_get_u16(a)); 139405752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 139505752523SJarno Rajahalme break; 139605752523SJarno Rajahalme 139705752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_MAX: 139805752523SJarno Rajahalme have_proto_max = true; 139905752523SJarno Rajahalme info->range.max_proto.all = htons(nla_get_u16(a)); 140005752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 140105752523SJarno Rajahalme break; 140205752523SJarno Rajahalme 140305752523SJarno Rajahalme case OVS_NAT_ATTR_PERSISTENT: 140405752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PERSISTENT; 140505752523SJarno Rajahalme break; 140605752523SJarno Rajahalme 140705752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_HASH: 140805752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM; 140905752523SJarno Rajahalme break; 141005752523SJarno Rajahalme 141105752523SJarno Rajahalme case OVS_NAT_ATTR_PROTO_RANDOM: 141205752523SJarno Rajahalme info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM_FULLY; 141305752523SJarno Rajahalme break; 141405752523SJarno Rajahalme 141505752523SJarno Rajahalme default: 14160ed80da5SJoe Perches OVS_NLERR(log, "Unknown nat attribute (%d)", type); 141705752523SJarno Rajahalme return -EINVAL; 141805752523SJarno Rajahalme } 141905752523SJarno Rajahalme } 142005752523SJarno Rajahalme 142105752523SJarno Rajahalme if (rem > 0) { 14220ed80da5SJoe Perches OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem); 142305752523SJarno Rajahalme return -EINVAL; 142405752523SJarno Rajahalme } 142505752523SJarno Rajahalme if (!info->nat) { 142605752523SJarno Rajahalme /* Do not allow flags if no type is given. */ 142705752523SJarno Rajahalme if (info->range.flags) { 142805752523SJarno Rajahalme OVS_NLERR(log, 1429e0b10844SJulia Lawall "NAT flags may be given only when NAT range (SRC or DST) is also specified." 143005752523SJarno Rajahalme ); 143105752523SJarno Rajahalme return -EINVAL; 143205752523SJarno Rajahalme } 143305752523SJarno Rajahalme info->nat = OVS_CT_NAT; /* NAT existing connections. */ 143405752523SJarno Rajahalme } else if (!info->commit) { 143505752523SJarno Rajahalme OVS_NLERR(log, 1436e0b10844SJulia Lawall "NAT attributes may be specified only when CT COMMIT flag is also specified." 143705752523SJarno Rajahalme ); 143805752523SJarno Rajahalme return -EINVAL; 143905752523SJarno Rajahalme } 144005752523SJarno Rajahalme /* Allow missing IP_MAX. */ 144105752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS && !have_ip_max) { 144205752523SJarno Rajahalme memcpy(&info->range.max_addr, &info->range.min_addr, 144305752523SJarno Rajahalme sizeof(info->range.max_addr)); 144405752523SJarno Rajahalme } 144505752523SJarno Rajahalme /* Allow missing PROTO_MAX. */ 144605752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 144705752523SJarno Rajahalme !have_proto_max) { 144805752523SJarno Rajahalme info->range.max_proto.all = info->range.min_proto.all; 144905752523SJarno Rajahalme } 145005752523SJarno Rajahalme return 0; 145105752523SJarno Rajahalme } 145205752523SJarno Rajahalme #endif 145305752523SJarno Rajahalme 14547f8a436eSJoe Stringer static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = { 1455ab38a7b5SJoe Stringer [OVS_CT_ATTR_COMMIT] = { .minlen = 0, .maxlen = 0 }, 1456dd41d33fSJarno Rajahalme [OVS_CT_ATTR_FORCE_COMMIT] = { .minlen = 0, .maxlen = 0 }, 14577f8a436eSJoe Stringer [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16), 14587f8a436eSJoe Stringer .maxlen = sizeof(u16) }, 1459182e3042SJoe Stringer [OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark), 1460182e3042SJoe Stringer .maxlen = sizeof(struct md_mark) }, 146133db4125SJoe Stringer [OVS_CT_ATTR_LABELS] = { .minlen = sizeof(struct md_labels), 146233db4125SJoe Stringer .maxlen = sizeof(struct md_labels) }, 1463cae3a262SJoe Stringer [OVS_CT_ATTR_HELPER] = { .minlen = 1, 146405752523SJarno Rajahalme .maxlen = NF_CT_HELPER_NAME_LEN }, 146505752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 146605752523SJarno Rajahalme /* NAT length is checked when parsing the nested attributes. */ 146705752523SJarno Rajahalme [OVS_CT_ATTR_NAT] = { .minlen = 0, .maxlen = INT_MAX }, 146805752523SJarno Rajahalme #endif 146912064551SJarno Rajahalme [OVS_CT_ATTR_EVENTMASK] = { .minlen = sizeof(u32), 147012064551SJarno Rajahalme .maxlen = sizeof(u32) }, 14717f8a436eSJoe Stringer }; 14727f8a436eSJoe Stringer 14737f8a436eSJoe Stringer static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info, 1474cae3a262SJoe Stringer const char **helper, bool log) 14757f8a436eSJoe Stringer { 14767f8a436eSJoe Stringer struct nlattr *a; 14777f8a436eSJoe Stringer int rem; 14787f8a436eSJoe Stringer 14797f8a436eSJoe Stringer nla_for_each_nested(a, attr, rem) { 14807f8a436eSJoe Stringer int type = nla_type(a); 148169ec932eSLiping Zhang int maxlen; 148269ec932eSLiping Zhang int minlen; 14837f8a436eSJoe Stringer 14847f8a436eSJoe Stringer if (type > OVS_CT_ATTR_MAX) { 14857f8a436eSJoe Stringer OVS_NLERR(log, 14867f8a436eSJoe Stringer "Unknown conntrack attr (type=%d, max=%d)", 14877f8a436eSJoe Stringer type, OVS_CT_ATTR_MAX); 14887f8a436eSJoe Stringer return -EINVAL; 14897f8a436eSJoe Stringer } 149069ec932eSLiping Zhang 149169ec932eSLiping Zhang maxlen = ovs_ct_attr_lens[type].maxlen; 149269ec932eSLiping Zhang minlen = ovs_ct_attr_lens[type].minlen; 14937f8a436eSJoe Stringer if (nla_len(a) < minlen || nla_len(a) > maxlen) { 14947f8a436eSJoe Stringer OVS_NLERR(log, 14957f8a436eSJoe Stringer "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)", 14967f8a436eSJoe Stringer type, nla_len(a), maxlen); 14977f8a436eSJoe Stringer return -EINVAL; 14987f8a436eSJoe Stringer } 14997f8a436eSJoe Stringer 15007f8a436eSJoe Stringer switch (type) { 1501dd41d33fSJarno Rajahalme case OVS_CT_ATTR_FORCE_COMMIT: 1502dd41d33fSJarno Rajahalme info->force = true; 1503dd41d33fSJarno Rajahalme /* fall through. */ 1504ab38a7b5SJoe Stringer case OVS_CT_ATTR_COMMIT: 1505ab38a7b5SJoe Stringer info->commit = true; 15067f8a436eSJoe Stringer break; 15077f8a436eSJoe Stringer #ifdef CONFIG_NF_CONNTRACK_ZONES 15087f8a436eSJoe Stringer case OVS_CT_ATTR_ZONE: 15097f8a436eSJoe Stringer info->zone.id = nla_get_u16(a); 15107f8a436eSJoe Stringer break; 15117f8a436eSJoe Stringer #endif 1512182e3042SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_MARK 1513182e3042SJoe Stringer case OVS_CT_ATTR_MARK: { 1514182e3042SJoe Stringer struct md_mark *mark = nla_data(a); 1515182e3042SJoe Stringer 1516e754ec69SJoe Stringer if (!mark->mask) { 1517e754ec69SJoe Stringer OVS_NLERR(log, "ct_mark mask cannot be 0"); 1518e754ec69SJoe Stringer return -EINVAL; 1519e754ec69SJoe Stringer } 1520182e3042SJoe Stringer info->mark = *mark; 1521182e3042SJoe Stringer break; 1522182e3042SJoe Stringer } 1523182e3042SJoe Stringer #endif 1524c2ac6673SJoe Stringer #ifdef CONFIG_NF_CONNTRACK_LABELS 152533db4125SJoe Stringer case OVS_CT_ATTR_LABELS: { 152633db4125SJoe Stringer struct md_labels *labels = nla_data(a); 1527c2ac6673SJoe Stringer 1528e754ec69SJoe Stringer if (!labels_nonzero(&labels->mask)) { 1529e754ec69SJoe Stringer OVS_NLERR(log, "ct_labels mask cannot be 0"); 1530e754ec69SJoe Stringer return -EINVAL; 1531e754ec69SJoe Stringer } 153233db4125SJoe Stringer info->labels = *labels; 1533c2ac6673SJoe Stringer break; 1534c2ac6673SJoe Stringer } 1535c2ac6673SJoe Stringer #endif 1536cae3a262SJoe Stringer case OVS_CT_ATTR_HELPER: 1537cae3a262SJoe Stringer *helper = nla_data(a); 1538cae3a262SJoe Stringer if (!memchr(*helper, '\0', nla_len(a))) { 1539cae3a262SJoe Stringer OVS_NLERR(log, "Invalid conntrack helper"); 1540cae3a262SJoe Stringer return -EINVAL; 1541cae3a262SJoe Stringer } 1542cae3a262SJoe Stringer break; 154305752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 154405752523SJarno Rajahalme case OVS_CT_ATTR_NAT: { 154505752523SJarno Rajahalme int err = parse_nat(a, info, log); 154605752523SJarno Rajahalme 154705752523SJarno Rajahalme if (err) 154805752523SJarno Rajahalme return err; 154905752523SJarno Rajahalme break; 155005752523SJarno Rajahalme } 155105752523SJarno Rajahalme #endif 155212064551SJarno Rajahalme case OVS_CT_ATTR_EVENTMASK: 155312064551SJarno Rajahalme info->have_eventmask = true; 155412064551SJarno Rajahalme info->eventmask = nla_get_u32(a); 155512064551SJarno Rajahalme break; 155612064551SJarno Rajahalme 15577f8a436eSJoe Stringer default: 15587f8a436eSJoe Stringer OVS_NLERR(log, "Unknown conntrack attr (%d)", 15597f8a436eSJoe Stringer type); 15607f8a436eSJoe Stringer return -EINVAL; 15617f8a436eSJoe Stringer } 15627f8a436eSJoe Stringer } 15637f8a436eSJoe Stringer 15647d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_MARK 15657d904c7bSJarno Rajahalme if (!info->commit && info->mark.mask) { 15667d904c7bSJarno Rajahalme OVS_NLERR(log, 15677d904c7bSJarno Rajahalme "Setting conntrack mark requires 'commit' flag."); 15687d904c7bSJarno Rajahalme return -EINVAL; 15697d904c7bSJarno Rajahalme } 15707d904c7bSJarno Rajahalme #endif 15717d904c7bSJarno Rajahalme #ifdef CONFIG_NF_CONNTRACK_LABELS 15727d904c7bSJarno Rajahalme if (!info->commit && labels_nonzero(&info->labels.mask)) { 15737d904c7bSJarno Rajahalme OVS_NLERR(log, 15747d904c7bSJarno Rajahalme "Setting conntrack labels requires 'commit' flag."); 15757d904c7bSJarno Rajahalme return -EINVAL; 15767d904c7bSJarno Rajahalme } 15777d904c7bSJarno Rajahalme #endif 15787f8a436eSJoe Stringer if (rem > 0) { 15797f8a436eSJoe Stringer OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem); 15807f8a436eSJoe Stringer return -EINVAL; 15817f8a436eSJoe Stringer } 15827f8a436eSJoe Stringer 15837f8a436eSJoe Stringer return 0; 15847f8a436eSJoe Stringer } 15857f8a436eSJoe Stringer 1586c2ac6673SJoe Stringer bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr) 15877f8a436eSJoe Stringer { 15887f8a436eSJoe Stringer if (attr == OVS_KEY_ATTR_CT_STATE) 15897f8a436eSJoe Stringer return true; 15907f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 15917f8a436eSJoe Stringer attr == OVS_KEY_ATTR_CT_ZONE) 15927f8a436eSJoe Stringer return true; 1593182e3042SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 1594182e3042SJoe Stringer attr == OVS_KEY_ATTR_CT_MARK) 1595182e3042SJoe Stringer return true; 1596c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 159733db4125SJoe Stringer attr == OVS_KEY_ATTR_CT_LABELS) { 1598c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 1599c2ac6673SJoe Stringer 1600c2ac6673SJoe Stringer return ovs_net->xt_label; 1601c2ac6673SJoe Stringer } 16027f8a436eSJoe Stringer 16037f8a436eSJoe Stringer return false; 16047f8a436eSJoe Stringer } 16057f8a436eSJoe Stringer 16067f8a436eSJoe Stringer int ovs_ct_copy_action(struct net *net, const struct nlattr *attr, 16077f8a436eSJoe Stringer const struct sw_flow_key *key, 16087f8a436eSJoe Stringer struct sw_flow_actions **sfa, bool log) 16097f8a436eSJoe Stringer { 16107f8a436eSJoe Stringer struct ovs_conntrack_info ct_info; 1611cae3a262SJoe Stringer const char *helper = NULL; 16127f8a436eSJoe Stringer u16 family; 16137f8a436eSJoe Stringer int err; 16147f8a436eSJoe Stringer 16157f8a436eSJoe Stringer family = key_to_nfproto(key); 16167f8a436eSJoe Stringer if (family == NFPROTO_UNSPEC) { 16177f8a436eSJoe Stringer OVS_NLERR(log, "ct family unspecified"); 16187f8a436eSJoe Stringer return -EINVAL; 16197f8a436eSJoe Stringer } 16207f8a436eSJoe Stringer 16217f8a436eSJoe Stringer memset(&ct_info, 0, sizeof(ct_info)); 16227f8a436eSJoe Stringer ct_info.family = family; 16237f8a436eSJoe Stringer 16247f8a436eSJoe Stringer nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID, 16257f8a436eSJoe Stringer NF_CT_DEFAULT_ZONE_DIR, 0); 16267f8a436eSJoe Stringer 1627cae3a262SJoe Stringer err = parse_ct(attr, &ct_info, &helper, log); 16287f8a436eSJoe Stringer if (err) 16297f8a436eSJoe Stringer return err; 16307f8a436eSJoe Stringer 16317f8a436eSJoe Stringer /* Set up template for tracking connections in specific zones. */ 16327f8a436eSJoe Stringer ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL); 16337f8a436eSJoe Stringer if (!ct_info.ct) { 16347f8a436eSJoe Stringer OVS_NLERR(log, "Failed to allocate conntrack template"); 16357f8a436eSJoe Stringer return -ENOMEM; 16367f8a436eSJoe Stringer } 163790c7afc9SJoe Stringer 163890c7afc9SJoe Stringer __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status); 163990c7afc9SJoe Stringer nf_conntrack_get(&ct_info.ct->ct_general); 164090c7afc9SJoe Stringer 1641cae3a262SJoe Stringer if (helper) { 1642cae3a262SJoe Stringer err = ovs_ct_add_helper(&ct_info, helper, key, log); 1643cae3a262SJoe Stringer if (err) 1644cae3a262SJoe Stringer goto err_free_ct; 1645cae3a262SJoe Stringer } 16467f8a436eSJoe Stringer 16477f8a436eSJoe Stringer err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info, 16487f8a436eSJoe Stringer sizeof(ct_info), log); 16497f8a436eSJoe Stringer if (err) 16507f8a436eSJoe Stringer goto err_free_ct; 16517f8a436eSJoe Stringer 16527f8a436eSJoe Stringer return 0; 16537f8a436eSJoe Stringer err_free_ct: 16542f3ab9f9SJoe Stringer __ovs_ct_free_action(&ct_info); 16557f8a436eSJoe Stringer return err; 16567f8a436eSJoe Stringer } 16577f8a436eSJoe Stringer 165805752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 165905752523SJarno Rajahalme static bool ovs_ct_nat_to_attr(const struct ovs_conntrack_info *info, 166005752523SJarno Rajahalme struct sk_buff *skb) 166105752523SJarno Rajahalme { 166205752523SJarno Rajahalme struct nlattr *start; 166305752523SJarno Rajahalme 166405752523SJarno Rajahalme start = nla_nest_start(skb, OVS_CT_ATTR_NAT); 166505752523SJarno Rajahalme if (!start) 166605752523SJarno Rajahalme return false; 166705752523SJarno Rajahalme 166805752523SJarno Rajahalme if (info->nat & OVS_CT_SRC_NAT) { 166905752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_SRC)) 167005752523SJarno Rajahalme return false; 167105752523SJarno Rajahalme } else if (info->nat & OVS_CT_DST_NAT) { 167205752523SJarno Rajahalme if (nla_put_flag(skb, OVS_NAT_ATTR_DST)) 167305752523SJarno Rajahalme return false; 167405752523SJarno Rajahalme } else { 167505752523SJarno Rajahalme goto out; 167605752523SJarno Rajahalme } 167705752523SJarno Rajahalme 167805752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_MAP_IPS) { 167999b7248eSArnd Bergmann if (IS_ENABLED(CONFIG_NF_NAT_IPV4) && 168099b7248eSArnd Bergmann info->family == NFPROTO_IPV4) { 168105752523SJarno Rajahalme if (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MIN, 168205752523SJarno Rajahalme info->range.min_addr.ip) || 168305752523SJarno Rajahalme (info->range.max_addr.ip 168405752523SJarno Rajahalme != info->range.min_addr.ip && 168505752523SJarno Rajahalme (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MAX, 168605752523SJarno Rajahalme info->range.max_addr.ip)))) 168705752523SJarno Rajahalme return false; 168899b7248eSArnd Bergmann } else if (IS_ENABLED(CONFIG_NF_NAT_IPV6) && 168999b7248eSArnd Bergmann info->family == NFPROTO_IPV6) { 169005752523SJarno Rajahalme if (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MIN, 169105752523SJarno Rajahalme &info->range.min_addr.in6) || 169205752523SJarno Rajahalme (memcmp(&info->range.max_addr.in6, 169305752523SJarno Rajahalme &info->range.min_addr.in6, 169405752523SJarno Rajahalme sizeof(info->range.max_addr.in6)) && 169505752523SJarno Rajahalme (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MAX, 169605752523SJarno Rajahalme &info->range.max_addr.in6)))) 169705752523SJarno Rajahalme return false; 169805752523SJarno Rajahalme } else { 169905752523SJarno Rajahalme return false; 170005752523SJarno Rajahalme } 170105752523SJarno Rajahalme } 170205752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && 170305752523SJarno Rajahalme (nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MIN, 170405752523SJarno Rajahalme ntohs(info->range.min_proto.all)) || 170505752523SJarno Rajahalme (info->range.max_proto.all != info->range.min_proto.all && 170605752523SJarno Rajahalme nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MAX, 170705752523SJarno Rajahalme ntohs(info->range.max_proto.all))))) 170805752523SJarno Rajahalme return false; 170905752523SJarno Rajahalme 171005752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PERSISTENT && 171105752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PERSISTENT)) 171205752523SJarno Rajahalme return false; 171305752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM && 171405752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_HASH)) 171505752523SJarno Rajahalme return false; 171605752523SJarno Rajahalme if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY && 171705752523SJarno Rajahalme nla_put_flag(skb, OVS_NAT_ATTR_PROTO_RANDOM)) 171805752523SJarno Rajahalme return false; 171905752523SJarno Rajahalme out: 172005752523SJarno Rajahalme nla_nest_end(skb, start); 172105752523SJarno Rajahalme 172205752523SJarno Rajahalme return true; 172305752523SJarno Rajahalme } 172405752523SJarno Rajahalme #endif 172505752523SJarno Rajahalme 17267f8a436eSJoe Stringer int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info, 17277f8a436eSJoe Stringer struct sk_buff *skb) 17287f8a436eSJoe Stringer { 17297f8a436eSJoe Stringer struct nlattr *start; 17307f8a436eSJoe Stringer 17317f8a436eSJoe Stringer start = nla_nest_start(skb, OVS_ACTION_ATTR_CT); 17327f8a436eSJoe Stringer if (!start) 17337f8a436eSJoe Stringer return -EMSGSIZE; 17347f8a436eSJoe Stringer 1735dd41d33fSJarno Rajahalme if (ct_info->commit && nla_put_flag(skb, ct_info->force 1736dd41d33fSJarno Rajahalme ? OVS_CT_ATTR_FORCE_COMMIT 1737dd41d33fSJarno Rajahalme : OVS_CT_ATTR_COMMIT)) 17387f8a436eSJoe Stringer return -EMSGSIZE; 17397f8a436eSJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 17407f8a436eSJoe Stringer nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id)) 17417f8a436eSJoe Stringer return -EMSGSIZE; 1742e754ec69SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && ct_info->mark.mask && 1743182e3042SJoe Stringer nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark), 1744182e3042SJoe Stringer &ct_info->mark)) 1745182e3042SJoe Stringer return -EMSGSIZE; 1746c2ac6673SJoe Stringer if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1747e754ec69SJoe Stringer labels_nonzero(&ct_info->labels.mask) && 174833db4125SJoe Stringer nla_put(skb, OVS_CT_ATTR_LABELS, sizeof(ct_info->labels), 174933db4125SJoe Stringer &ct_info->labels)) 1750c2ac6673SJoe Stringer return -EMSGSIZE; 1751cae3a262SJoe Stringer if (ct_info->helper) { 1752cae3a262SJoe Stringer if (nla_put_string(skb, OVS_CT_ATTR_HELPER, 1753cae3a262SJoe Stringer ct_info->helper->name)) 1754cae3a262SJoe Stringer return -EMSGSIZE; 1755cae3a262SJoe Stringer } 175612064551SJarno Rajahalme if (ct_info->have_eventmask && 175712064551SJarno Rajahalme nla_put_u32(skb, OVS_CT_ATTR_EVENTMASK, ct_info->eventmask)) 175812064551SJarno Rajahalme return -EMSGSIZE; 175912064551SJarno Rajahalme 176005752523SJarno Rajahalme #ifdef CONFIG_NF_NAT_NEEDED 176105752523SJarno Rajahalme if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb)) 176205752523SJarno Rajahalme return -EMSGSIZE; 176305752523SJarno Rajahalme #endif 17647f8a436eSJoe Stringer nla_nest_end(skb, start); 17657f8a436eSJoe Stringer 17667f8a436eSJoe Stringer return 0; 17677f8a436eSJoe Stringer } 17687f8a436eSJoe Stringer 17697f8a436eSJoe Stringer void ovs_ct_free_action(const struct nlattr *a) 17707f8a436eSJoe Stringer { 17717f8a436eSJoe Stringer struct ovs_conntrack_info *ct_info = nla_data(a); 17727f8a436eSJoe Stringer 17732f3ab9f9SJoe Stringer __ovs_ct_free_action(ct_info); 17742f3ab9f9SJoe Stringer } 17752f3ab9f9SJoe Stringer 17762f3ab9f9SJoe Stringer static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info) 17772f3ab9f9SJoe Stringer { 1778cae3a262SJoe Stringer if (ct_info->helper) 1779d91fc59cSLiping Zhang nf_conntrack_helper_put(ct_info->helper); 17807f8a436eSJoe Stringer if (ct_info->ct) 178176644232SJoe Stringer nf_ct_tmpl_free(ct_info->ct); 17827f8a436eSJoe Stringer } 1783c2ac6673SJoe Stringer 178411efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 178511efd5cbSYi-Hung Wei static int ovs_ct_limit_init(struct net *net, struct ovs_net *ovs_net) 178611efd5cbSYi-Hung Wei { 178711efd5cbSYi-Hung Wei int i, err; 178811efd5cbSYi-Hung Wei 178911efd5cbSYi-Hung Wei ovs_net->ct_limit_info = kmalloc(sizeof(*ovs_net->ct_limit_info), 179011efd5cbSYi-Hung Wei GFP_KERNEL); 179111efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info) 179211efd5cbSYi-Hung Wei return -ENOMEM; 179311efd5cbSYi-Hung Wei 179411efd5cbSYi-Hung Wei ovs_net->ct_limit_info->default_limit = OVS_CT_LIMIT_DEFAULT; 179511efd5cbSYi-Hung Wei ovs_net->ct_limit_info->limits = 179611efd5cbSYi-Hung Wei kmalloc_array(CT_LIMIT_HASH_BUCKETS, sizeof(struct hlist_head), 179711efd5cbSYi-Hung Wei GFP_KERNEL); 179811efd5cbSYi-Hung Wei if (!ovs_net->ct_limit_info->limits) { 179911efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 180011efd5cbSYi-Hung Wei return -ENOMEM; 180111efd5cbSYi-Hung Wei } 180211efd5cbSYi-Hung Wei 180311efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; i++) 180411efd5cbSYi-Hung Wei INIT_HLIST_HEAD(&ovs_net->ct_limit_info->limits[i]); 180511efd5cbSYi-Hung Wei 180611efd5cbSYi-Hung Wei ovs_net->ct_limit_info->data = 180711efd5cbSYi-Hung Wei nf_conncount_init(net, NFPROTO_INET, sizeof(u32)); 180811efd5cbSYi-Hung Wei 180911efd5cbSYi-Hung Wei if (IS_ERR(ovs_net->ct_limit_info->data)) { 181011efd5cbSYi-Hung Wei err = PTR_ERR(ovs_net->ct_limit_info->data); 181111efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info->limits); 181211efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 181311efd5cbSYi-Hung Wei pr_err("openvswitch: failed to init nf_conncount %d\n", err); 181411efd5cbSYi-Hung Wei return err; 181511efd5cbSYi-Hung Wei } 181611efd5cbSYi-Hung Wei return 0; 181711efd5cbSYi-Hung Wei } 181811efd5cbSYi-Hung Wei 181911efd5cbSYi-Hung Wei static void ovs_ct_limit_exit(struct net *net, struct ovs_net *ovs_net) 182011efd5cbSYi-Hung Wei { 182111efd5cbSYi-Hung Wei const struct ovs_ct_limit_info *info = ovs_net->ct_limit_info; 182211efd5cbSYi-Hung Wei int i; 182311efd5cbSYi-Hung Wei 182411efd5cbSYi-Hung Wei nf_conncount_destroy(net, NFPROTO_INET, info->data); 182511efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 182611efd5cbSYi-Hung Wei struct hlist_head *head = &info->limits[i]; 182711efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 182811efd5cbSYi-Hung Wei 182911efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) 183011efd5cbSYi-Hung Wei kfree_rcu(ct_limit, rcu); 183111efd5cbSYi-Hung Wei } 183211efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info->limits); 183311efd5cbSYi-Hung Wei kfree(ovs_net->ct_limit_info); 183411efd5cbSYi-Hung Wei } 183511efd5cbSYi-Hung Wei 183611efd5cbSYi-Hung Wei static struct sk_buff * 183711efd5cbSYi-Hung Wei ovs_ct_limit_cmd_reply_start(struct genl_info *info, u8 cmd, 183811efd5cbSYi-Hung Wei struct ovs_header **ovs_reply_header) 183911efd5cbSYi-Hung Wei { 184011efd5cbSYi-Hung Wei struct ovs_header *ovs_header = info->userhdr; 184111efd5cbSYi-Hung Wei struct sk_buff *skb; 184211efd5cbSYi-Hung Wei 184311efd5cbSYi-Hung Wei skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 184411efd5cbSYi-Hung Wei if (!skb) 184511efd5cbSYi-Hung Wei return ERR_PTR(-ENOMEM); 184611efd5cbSYi-Hung Wei 184711efd5cbSYi-Hung Wei *ovs_reply_header = genlmsg_put(skb, info->snd_portid, 184811efd5cbSYi-Hung Wei info->snd_seq, 184911efd5cbSYi-Hung Wei &dp_ct_limit_genl_family, 0, cmd); 185011efd5cbSYi-Hung Wei 185111efd5cbSYi-Hung Wei if (!*ovs_reply_header) { 185211efd5cbSYi-Hung Wei nlmsg_free(skb); 185311efd5cbSYi-Hung Wei return ERR_PTR(-EMSGSIZE); 185411efd5cbSYi-Hung Wei } 185511efd5cbSYi-Hung Wei (*ovs_reply_header)->dp_ifindex = ovs_header->dp_ifindex; 185611efd5cbSYi-Hung Wei 185711efd5cbSYi-Hung Wei return skb; 185811efd5cbSYi-Hung Wei } 185911efd5cbSYi-Hung Wei 186011efd5cbSYi-Hung Wei static bool check_zone_id(int zone_id, u16 *pzone) 186111efd5cbSYi-Hung Wei { 186211efd5cbSYi-Hung Wei if (zone_id >= 0 && zone_id <= 65535) { 186311efd5cbSYi-Hung Wei *pzone = (u16)zone_id; 186411efd5cbSYi-Hung Wei return true; 186511efd5cbSYi-Hung Wei } 186611efd5cbSYi-Hung Wei return false; 186711efd5cbSYi-Hung Wei } 186811efd5cbSYi-Hung Wei 186911efd5cbSYi-Hung Wei static int ovs_ct_limit_set_zone_limit(struct nlattr *nla_zone_limit, 187011efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 187111efd5cbSYi-Hung Wei { 187211efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 187311efd5cbSYi-Hung Wei int rem; 187411efd5cbSYi-Hung Wei u16 zone; 187511efd5cbSYi-Hung Wei 187611efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 187711efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 187811efd5cbSYi-Hung Wei 187911efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 188011efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 188111efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 188211efd5cbSYi-Hung Wei ovs_lock(); 188311efd5cbSYi-Hung Wei info->default_limit = zone_limit->limit; 188411efd5cbSYi-Hung Wei ovs_unlock(); 188511efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 188611efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 188711efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 188811efd5cbSYi-Hung Wei } else { 188911efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 189011efd5cbSYi-Hung Wei 189111efd5cbSYi-Hung Wei ct_limit = kmalloc(sizeof(*ct_limit), GFP_KERNEL); 189211efd5cbSYi-Hung Wei if (!ct_limit) 189311efd5cbSYi-Hung Wei return -ENOMEM; 189411efd5cbSYi-Hung Wei 189511efd5cbSYi-Hung Wei ct_limit->zone = zone; 189611efd5cbSYi-Hung Wei ct_limit->limit = zone_limit->limit; 189711efd5cbSYi-Hung Wei 189811efd5cbSYi-Hung Wei ovs_lock(); 189911efd5cbSYi-Hung Wei ct_limit_set(info, ct_limit); 190011efd5cbSYi-Hung Wei ovs_unlock(); 190111efd5cbSYi-Hung Wei } 190211efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 190311efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 190411efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 190511efd5cbSYi-Hung Wei } 190611efd5cbSYi-Hung Wei 190711efd5cbSYi-Hung Wei if (rem) 190811efd5cbSYi-Hung Wei OVS_NLERR(true, "set zone limit has %d unknown bytes", rem); 190911efd5cbSYi-Hung Wei 191011efd5cbSYi-Hung Wei return 0; 191111efd5cbSYi-Hung Wei } 191211efd5cbSYi-Hung Wei 191311efd5cbSYi-Hung Wei static int ovs_ct_limit_del_zone_limit(struct nlattr *nla_zone_limit, 191411efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info) 191511efd5cbSYi-Hung Wei { 191611efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 191711efd5cbSYi-Hung Wei int rem; 191811efd5cbSYi-Hung Wei u16 zone; 191911efd5cbSYi-Hung Wei 192011efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 192111efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 192211efd5cbSYi-Hung Wei 192311efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 192411efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 192511efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 192611efd5cbSYi-Hung Wei ovs_lock(); 192711efd5cbSYi-Hung Wei info->default_limit = OVS_CT_LIMIT_DEFAULT; 192811efd5cbSYi-Hung Wei ovs_unlock(); 192911efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id( 193011efd5cbSYi-Hung Wei zone_limit->zone_id, &zone))) { 193111efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 193211efd5cbSYi-Hung Wei } else { 193311efd5cbSYi-Hung Wei ovs_lock(); 193411efd5cbSYi-Hung Wei ct_limit_del(info, zone); 193511efd5cbSYi-Hung Wei ovs_unlock(); 193611efd5cbSYi-Hung Wei } 193711efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 193811efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 193911efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 194011efd5cbSYi-Hung Wei } 194111efd5cbSYi-Hung Wei 194211efd5cbSYi-Hung Wei if (rem) 194311efd5cbSYi-Hung Wei OVS_NLERR(true, "del zone limit has %d unknown bytes", rem); 194411efd5cbSYi-Hung Wei 194511efd5cbSYi-Hung Wei return 0; 194611efd5cbSYi-Hung Wei } 194711efd5cbSYi-Hung Wei 194811efd5cbSYi-Hung Wei static int ovs_ct_limit_get_default_limit(struct ovs_ct_limit_info *info, 194911efd5cbSYi-Hung Wei struct sk_buff *reply) 195011efd5cbSYi-Hung Wei { 195111efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 195211efd5cbSYi-Hung Wei int err; 195311efd5cbSYi-Hung Wei 195411efd5cbSYi-Hung Wei zone_limit.zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE; 195511efd5cbSYi-Hung Wei zone_limit.limit = info->default_limit; 195611efd5cbSYi-Hung Wei err = nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 195711efd5cbSYi-Hung Wei if (err) 195811efd5cbSYi-Hung Wei return err; 195911efd5cbSYi-Hung Wei 196011efd5cbSYi-Hung Wei return 0; 196111efd5cbSYi-Hung Wei } 196211efd5cbSYi-Hung Wei 196311efd5cbSYi-Hung Wei static int __ovs_ct_limit_get_zone_limit(struct net *net, 196411efd5cbSYi-Hung Wei struct nf_conncount_data *data, 196511efd5cbSYi-Hung Wei u16 zone_id, u32 limit, 196611efd5cbSYi-Hung Wei struct sk_buff *reply) 196711efd5cbSYi-Hung Wei { 196811efd5cbSYi-Hung Wei struct nf_conntrack_zone ct_zone; 196911efd5cbSYi-Hung Wei struct ovs_zone_limit zone_limit; 197011efd5cbSYi-Hung Wei u32 conncount_key = zone_id; 197111efd5cbSYi-Hung Wei 197211efd5cbSYi-Hung Wei zone_limit.zone_id = zone_id; 197311efd5cbSYi-Hung Wei zone_limit.limit = limit; 197411efd5cbSYi-Hung Wei nf_ct_zone_init(&ct_zone, zone_id, NF_CT_DEFAULT_ZONE_DIR, 0); 197511efd5cbSYi-Hung Wei 197611efd5cbSYi-Hung Wei zone_limit.count = nf_conncount_count(net, data, &conncount_key, NULL, 197711efd5cbSYi-Hung Wei &ct_zone); 197811efd5cbSYi-Hung Wei return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); 197911efd5cbSYi-Hung Wei } 198011efd5cbSYi-Hung Wei 198111efd5cbSYi-Hung Wei static int ovs_ct_limit_get_zone_limit(struct net *net, 198211efd5cbSYi-Hung Wei struct nlattr *nla_zone_limit, 198311efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 198411efd5cbSYi-Hung Wei struct sk_buff *reply) 198511efd5cbSYi-Hung Wei { 198611efd5cbSYi-Hung Wei struct ovs_zone_limit *zone_limit; 198711efd5cbSYi-Hung Wei int rem, err; 198811efd5cbSYi-Hung Wei u32 limit; 198911efd5cbSYi-Hung Wei u16 zone; 199011efd5cbSYi-Hung Wei 199111efd5cbSYi-Hung Wei rem = NLA_ALIGN(nla_len(nla_zone_limit)); 199211efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); 199311efd5cbSYi-Hung Wei 199411efd5cbSYi-Hung Wei while (rem >= sizeof(*zone_limit)) { 199511efd5cbSYi-Hung Wei if (unlikely(zone_limit->zone_id == 199611efd5cbSYi-Hung Wei OVS_ZONE_LIMIT_DEFAULT_ZONE)) { 199711efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 199811efd5cbSYi-Hung Wei if (err) 199911efd5cbSYi-Hung Wei return err; 200011efd5cbSYi-Hung Wei } else if (unlikely(!check_zone_id(zone_limit->zone_id, 200111efd5cbSYi-Hung Wei &zone))) { 200211efd5cbSYi-Hung Wei OVS_NLERR(true, "zone id is out of range"); 200311efd5cbSYi-Hung Wei } else { 200411efd5cbSYi-Hung Wei rcu_read_lock(); 200511efd5cbSYi-Hung Wei limit = ct_limit_get(info, zone); 200611efd5cbSYi-Hung Wei rcu_read_unlock(); 200711efd5cbSYi-Hung Wei 200811efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit( 200911efd5cbSYi-Hung Wei net, info->data, zone, limit, reply); 201011efd5cbSYi-Hung Wei if (err) 201111efd5cbSYi-Hung Wei return err; 201211efd5cbSYi-Hung Wei } 201311efd5cbSYi-Hung Wei rem -= NLA_ALIGN(sizeof(*zone_limit)); 201411efd5cbSYi-Hung Wei zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + 201511efd5cbSYi-Hung Wei NLA_ALIGN(sizeof(*zone_limit))); 201611efd5cbSYi-Hung Wei } 201711efd5cbSYi-Hung Wei 201811efd5cbSYi-Hung Wei if (rem) 201911efd5cbSYi-Hung Wei OVS_NLERR(true, "get zone limit has %d unknown bytes", rem); 202011efd5cbSYi-Hung Wei 202111efd5cbSYi-Hung Wei return 0; 202211efd5cbSYi-Hung Wei } 202311efd5cbSYi-Hung Wei 202411efd5cbSYi-Hung Wei static int ovs_ct_limit_get_all_zone_limit(struct net *net, 202511efd5cbSYi-Hung Wei struct ovs_ct_limit_info *info, 202611efd5cbSYi-Hung Wei struct sk_buff *reply) 202711efd5cbSYi-Hung Wei { 202811efd5cbSYi-Hung Wei struct ovs_ct_limit *ct_limit; 202911efd5cbSYi-Hung Wei struct hlist_head *head; 203011efd5cbSYi-Hung Wei int i, err = 0; 203111efd5cbSYi-Hung Wei 203211efd5cbSYi-Hung Wei err = ovs_ct_limit_get_default_limit(info, reply); 203311efd5cbSYi-Hung Wei if (err) 203411efd5cbSYi-Hung Wei return err; 203511efd5cbSYi-Hung Wei 203611efd5cbSYi-Hung Wei rcu_read_lock(); 203711efd5cbSYi-Hung Wei for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { 203811efd5cbSYi-Hung Wei head = &info->limits[i]; 203911efd5cbSYi-Hung Wei hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { 204011efd5cbSYi-Hung Wei err = __ovs_ct_limit_get_zone_limit(net, info->data, 204111efd5cbSYi-Hung Wei ct_limit->zone, ct_limit->limit, reply); 204211efd5cbSYi-Hung Wei if (err) 204311efd5cbSYi-Hung Wei goto exit_err; 204411efd5cbSYi-Hung Wei } 204511efd5cbSYi-Hung Wei } 204611efd5cbSYi-Hung Wei 204711efd5cbSYi-Hung Wei exit_err: 204811efd5cbSYi-Hung Wei rcu_read_unlock(); 204911efd5cbSYi-Hung Wei return err; 205011efd5cbSYi-Hung Wei } 205111efd5cbSYi-Hung Wei 205211efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_set(struct sk_buff *skb, struct genl_info *info) 205311efd5cbSYi-Hung Wei { 205411efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 205511efd5cbSYi-Hung Wei struct sk_buff *reply; 205611efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 205711efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 205811efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 205911efd5cbSYi-Hung Wei int err; 206011efd5cbSYi-Hung Wei 206111efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_SET, 206211efd5cbSYi-Hung Wei &ovs_reply_header); 206311efd5cbSYi-Hung Wei if (IS_ERR(reply)) 206411efd5cbSYi-Hung Wei return PTR_ERR(reply); 206511efd5cbSYi-Hung Wei 206611efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 206711efd5cbSYi-Hung Wei err = -EINVAL; 206811efd5cbSYi-Hung Wei goto exit_err; 206911efd5cbSYi-Hung Wei } 207011efd5cbSYi-Hung Wei 207111efd5cbSYi-Hung Wei err = ovs_ct_limit_set_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 207211efd5cbSYi-Hung Wei ct_limit_info); 207311efd5cbSYi-Hung Wei if (err) 207411efd5cbSYi-Hung Wei goto exit_err; 207511efd5cbSYi-Hung Wei 207611efd5cbSYi-Hung Wei static_branch_enable(&ovs_ct_limit_enabled); 207711efd5cbSYi-Hung Wei 207811efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 207911efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 208011efd5cbSYi-Hung Wei 208111efd5cbSYi-Hung Wei exit_err: 208211efd5cbSYi-Hung Wei nlmsg_free(reply); 208311efd5cbSYi-Hung Wei return err; 208411efd5cbSYi-Hung Wei } 208511efd5cbSYi-Hung Wei 208611efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_del(struct sk_buff *skb, struct genl_info *info) 208711efd5cbSYi-Hung Wei { 208811efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 208911efd5cbSYi-Hung Wei struct sk_buff *reply; 209011efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 209111efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); 209211efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 209311efd5cbSYi-Hung Wei int err; 209411efd5cbSYi-Hung Wei 209511efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_DEL, 209611efd5cbSYi-Hung Wei &ovs_reply_header); 209711efd5cbSYi-Hung Wei if (IS_ERR(reply)) 209811efd5cbSYi-Hung Wei return PTR_ERR(reply); 209911efd5cbSYi-Hung Wei 210011efd5cbSYi-Hung Wei if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 210111efd5cbSYi-Hung Wei err = -EINVAL; 210211efd5cbSYi-Hung Wei goto exit_err; 210311efd5cbSYi-Hung Wei } 210411efd5cbSYi-Hung Wei 210511efd5cbSYi-Hung Wei err = ovs_ct_limit_del_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], 210611efd5cbSYi-Hung Wei ct_limit_info); 210711efd5cbSYi-Hung Wei if (err) 210811efd5cbSYi-Hung Wei goto exit_err; 210911efd5cbSYi-Hung Wei 211011efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 211111efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 211211efd5cbSYi-Hung Wei 211311efd5cbSYi-Hung Wei exit_err: 211411efd5cbSYi-Hung Wei nlmsg_free(reply); 211511efd5cbSYi-Hung Wei return err; 211611efd5cbSYi-Hung Wei } 211711efd5cbSYi-Hung Wei 211811efd5cbSYi-Hung Wei static int ovs_ct_limit_cmd_get(struct sk_buff *skb, struct genl_info *info) 211911efd5cbSYi-Hung Wei { 212011efd5cbSYi-Hung Wei struct nlattr **a = info->attrs; 212111efd5cbSYi-Hung Wei struct nlattr *nla_reply; 212211efd5cbSYi-Hung Wei struct sk_buff *reply; 212311efd5cbSYi-Hung Wei struct ovs_header *ovs_reply_header; 212411efd5cbSYi-Hung Wei struct net *net = sock_net(skb->sk); 212511efd5cbSYi-Hung Wei struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 212611efd5cbSYi-Hung Wei struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; 212711efd5cbSYi-Hung Wei int err; 212811efd5cbSYi-Hung Wei 212911efd5cbSYi-Hung Wei reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_GET, 213011efd5cbSYi-Hung Wei &ovs_reply_header); 213111efd5cbSYi-Hung Wei if (IS_ERR(reply)) 213211efd5cbSYi-Hung Wei return PTR_ERR(reply); 213311efd5cbSYi-Hung Wei 213411efd5cbSYi-Hung Wei nla_reply = nla_nest_start(reply, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); 213511efd5cbSYi-Hung Wei 213611efd5cbSYi-Hung Wei if (a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { 213711efd5cbSYi-Hung Wei err = ovs_ct_limit_get_zone_limit( 213811efd5cbSYi-Hung Wei net, a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], ct_limit_info, 213911efd5cbSYi-Hung Wei reply); 214011efd5cbSYi-Hung Wei if (err) 214111efd5cbSYi-Hung Wei goto exit_err; 214211efd5cbSYi-Hung Wei } else { 214311efd5cbSYi-Hung Wei err = ovs_ct_limit_get_all_zone_limit(net, ct_limit_info, 214411efd5cbSYi-Hung Wei reply); 214511efd5cbSYi-Hung Wei if (err) 214611efd5cbSYi-Hung Wei goto exit_err; 214711efd5cbSYi-Hung Wei } 214811efd5cbSYi-Hung Wei 214911efd5cbSYi-Hung Wei nla_nest_end(reply, nla_reply); 215011efd5cbSYi-Hung Wei genlmsg_end(reply, ovs_reply_header); 215111efd5cbSYi-Hung Wei return genlmsg_reply(reply, info); 215211efd5cbSYi-Hung Wei 215311efd5cbSYi-Hung Wei exit_err: 215411efd5cbSYi-Hung Wei nlmsg_free(reply); 215511efd5cbSYi-Hung Wei return err; 215611efd5cbSYi-Hung Wei } 215711efd5cbSYi-Hung Wei 215811efd5cbSYi-Hung Wei static struct genl_ops ct_limit_genl_ops[] = { 215911efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_SET, 216011efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 216111efd5cbSYi-Hung Wei * privilege. */ 216211efd5cbSYi-Hung Wei .policy = ct_limit_policy, 216311efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_set, 216411efd5cbSYi-Hung Wei }, 216511efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_DEL, 216611efd5cbSYi-Hung Wei .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN 216711efd5cbSYi-Hung Wei * privilege. */ 216811efd5cbSYi-Hung Wei .policy = ct_limit_policy, 216911efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_del, 217011efd5cbSYi-Hung Wei }, 217111efd5cbSYi-Hung Wei { .cmd = OVS_CT_LIMIT_CMD_GET, 217211efd5cbSYi-Hung Wei .flags = 0, /* OK for unprivileged users. */ 217311efd5cbSYi-Hung Wei .policy = ct_limit_policy, 217411efd5cbSYi-Hung Wei .doit = ovs_ct_limit_cmd_get, 217511efd5cbSYi-Hung Wei }, 217611efd5cbSYi-Hung Wei }; 217711efd5cbSYi-Hung Wei 217811efd5cbSYi-Hung Wei static const struct genl_multicast_group ovs_ct_limit_multicast_group = { 217911efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_MCGROUP, 218011efd5cbSYi-Hung Wei }; 218111efd5cbSYi-Hung Wei 218211efd5cbSYi-Hung Wei struct genl_family dp_ct_limit_genl_family __ro_after_init = { 218311efd5cbSYi-Hung Wei .hdrsize = sizeof(struct ovs_header), 218411efd5cbSYi-Hung Wei .name = OVS_CT_LIMIT_FAMILY, 218511efd5cbSYi-Hung Wei .version = OVS_CT_LIMIT_VERSION, 218611efd5cbSYi-Hung Wei .maxattr = OVS_CT_LIMIT_ATTR_MAX, 218711efd5cbSYi-Hung Wei .netnsok = true, 218811efd5cbSYi-Hung Wei .parallel_ops = true, 218911efd5cbSYi-Hung Wei .ops = ct_limit_genl_ops, 219011efd5cbSYi-Hung Wei .n_ops = ARRAY_SIZE(ct_limit_genl_ops), 219111efd5cbSYi-Hung Wei .mcgrps = &ovs_ct_limit_multicast_group, 219211efd5cbSYi-Hung Wei .n_mcgrps = 1, 219311efd5cbSYi-Hung Wei .module = THIS_MODULE, 219411efd5cbSYi-Hung Wei }; 219511efd5cbSYi-Hung Wei #endif 219611efd5cbSYi-Hung Wei 219711efd5cbSYi-Hung Wei int ovs_ct_init(struct net *net) 2198c2ac6673SJoe Stringer { 219933db4125SJoe Stringer unsigned int n_bits = sizeof(struct ovs_key_ct_labels) * BITS_PER_BYTE; 2200c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2201c2ac6673SJoe Stringer 2202adff6c65SFlorian Westphal if (nf_connlabels_get(net, n_bits - 1)) { 2203c2ac6673SJoe Stringer ovs_net->xt_label = false; 2204c2ac6673SJoe Stringer OVS_NLERR(true, "Failed to set connlabel length"); 2205c2ac6673SJoe Stringer } else { 2206c2ac6673SJoe Stringer ovs_net->xt_label = true; 2207c2ac6673SJoe Stringer } 220811efd5cbSYi-Hung Wei 220911efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 221011efd5cbSYi-Hung Wei return ovs_ct_limit_init(net, ovs_net); 221111efd5cbSYi-Hung Wei #else 221211efd5cbSYi-Hung Wei return 0; 221311efd5cbSYi-Hung Wei #endif 2214c2ac6673SJoe Stringer } 2215c2ac6673SJoe Stringer 2216c2ac6673SJoe Stringer void ovs_ct_exit(struct net *net) 2217c2ac6673SJoe Stringer { 2218c2ac6673SJoe Stringer struct ovs_net *ovs_net = net_generic(net, ovs_net_id); 2219c2ac6673SJoe Stringer 222011efd5cbSYi-Hung Wei #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) 222111efd5cbSYi-Hung Wei ovs_ct_limit_exit(net, ovs_net); 222211efd5cbSYi-Hung Wei #endif 222311efd5cbSYi-Hung Wei 2224c2ac6673SJoe Stringer if (ovs_net->xt_label) 2225c2ac6673SJoe Stringer nf_connlabels_put(net); 2226c2ac6673SJoe Stringer } 2227