1b57dc7c1SPaul Blakey // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2b57dc7c1SPaul Blakey /* - 3b57dc7c1SPaul Blakey * net/sched/act_ct.c Connection Tracking action 4b57dc7c1SPaul Blakey * 5b57dc7c1SPaul Blakey * Authors: Paul Blakey <paulb@mellanox.com> 6b57dc7c1SPaul Blakey * Yossi Kuperman <yossiku@mellanox.com> 7b57dc7c1SPaul Blakey * Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> 8b57dc7c1SPaul Blakey */ 9b57dc7c1SPaul Blakey 10b57dc7c1SPaul Blakey #include <linux/module.h> 11b57dc7c1SPaul Blakey #include <linux/init.h> 12b57dc7c1SPaul Blakey #include <linux/kernel.h> 13b57dc7c1SPaul Blakey #include <linux/skbuff.h> 14b57dc7c1SPaul Blakey #include <linux/rtnetlink.h> 15b57dc7c1SPaul Blakey #include <linux/pkt_cls.h> 16b57dc7c1SPaul Blakey #include <linux/ip.h> 17b57dc7c1SPaul Blakey #include <linux/ipv6.h> 18c34b961aSPaul Blakey #include <linux/rhashtable.h> 19b57dc7c1SPaul Blakey #include <net/netlink.h> 20b57dc7c1SPaul Blakey #include <net/pkt_sched.h> 21b57dc7c1SPaul Blakey #include <net/pkt_cls.h> 22b57dc7c1SPaul Blakey #include <net/act_api.h> 23b57dc7c1SPaul Blakey #include <net/ip.h> 24b57dc7c1SPaul Blakey #include <net/ipv6_frag.h> 25b57dc7c1SPaul Blakey #include <uapi/linux/tc_act/tc_ct.h> 26b57dc7c1SPaul Blakey #include <net/tc_act/tc_ct.h> 27871cf386SPedro Tammela #include <net/tc_wrapper.h> 28b57dc7c1SPaul Blakey 29c34b961aSPaul Blakey #include <net/netfilter/nf_flow_table.h> 30b57dc7c1SPaul Blakey #include <net/netfilter/nf_conntrack.h> 31b57dc7c1SPaul Blakey #include <net/netfilter/nf_conntrack_core.h> 32b57dc7c1SPaul Blakey #include <net/netfilter/nf_conntrack_zones.h> 33b57dc7c1SPaul Blakey #include <net/netfilter/nf_conntrack_helper.h> 34beb97d3aSwenxu #include <net/netfilter/nf_conntrack_acct.h> 35b57dc7c1SPaul Blakey #include <net/netfilter/ipv6/nf_defrag_ipv6.h> 369795ded7SPaul Blakey #include <net/netfilter/nf_conntrack_act_ct.h> 37a21b06e7SXin Long #include <net/netfilter/nf_conntrack_seqadj.h> 3840d102cdSJeremy Sowden #include <uapi/linux/netfilter/nf_nat.h> 39b57dc7c1SPaul Blakey 40c34b961aSPaul Blakey static struct workqueue_struct *act_ct_wq; 41c34b961aSPaul Blakey static struct rhashtable zones_ht; 42138470a9SEric Dumazet static DEFINE_MUTEX(zones_mutex); 43c34b961aSPaul Blakey 44c34b961aSPaul Blakey struct tcf_ct_flow_table { 45c34b961aSPaul Blakey struct rhash_head node; /* In zones tables */ 46c34b961aSPaul Blakey 47c34b961aSPaul Blakey struct rcu_work rwork; 48c34b961aSPaul Blakey struct nf_flowtable nf_ft; 49138470a9SEric Dumazet refcount_t ref; 50c34b961aSPaul Blakey u16 zone; 51c34b961aSPaul Blakey 52c34b961aSPaul Blakey bool dying; 53c34b961aSPaul Blakey }; 54c34b961aSPaul Blakey 55c34b961aSPaul Blakey static const struct rhashtable_params zones_params = { 56c34b961aSPaul Blakey .head_offset = offsetof(struct tcf_ct_flow_table, node), 57c34b961aSPaul Blakey .key_offset = offsetof(struct tcf_ct_flow_table, zone), 58c34b961aSPaul Blakey .key_len = sizeof_field(struct tcf_ct_flow_table, zone), 59c34b961aSPaul Blakey .automatic_shrinking = true, 60c34b961aSPaul Blakey }; 61c34b961aSPaul Blakey 629c26ba9bSPaul Blakey static struct flow_action_entry * 639c26ba9bSPaul Blakey tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action) 649c26ba9bSPaul Blakey { 659c26ba9bSPaul Blakey int i = flow_action->num_entries++; 669c26ba9bSPaul Blakey 679c26ba9bSPaul Blakey return &flow_action->entries[i]; 689c26ba9bSPaul Blakey } 699c26ba9bSPaul Blakey 709c26ba9bSPaul Blakey static void tcf_ct_add_mangle_action(struct flow_action *action, 719c26ba9bSPaul Blakey enum flow_action_mangle_base htype, 729c26ba9bSPaul Blakey u32 offset, 739c26ba9bSPaul Blakey u32 mask, 749c26ba9bSPaul Blakey u32 val) 759c26ba9bSPaul Blakey { 769c26ba9bSPaul Blakey struct flow_action_entry *entry; 779c26ba9bSPaul Blakey 789c26ba9bSPaul Blakey entry = tcf_ct_flow_table_flow_action_get_next(action); 799c26ba9bSPaul Blakey entry->id = FLOW_ACTION_MANGLE; 809c26ba9bSPaul Blakey entry->mangle.htype = htype; 819c26ba9bSPaul Blakey entry->mangle.mask = ~mask; 829c26ba9bSPaul Blakey entry->mangle.offset = offset; 839c26ba9bSPaul Blakey entry->mangle.val = val; 849c26ba9bSPaul Blakey } 859c26ba9bSPaul Blakey 869c26ba9bSPaul Blakey /* The following nat helper functions check if the inverted reverse tuple 879c26ba9bSPaul Blakey * (target) is different then the current dir tuple - meaning nat for ports 889c26ba9bSPaul Blakey * and/or ip is needed, and add the relevant mangle actions. 899c26ba9bSPaul Blakey */ 909c26ba9bSPaul Blakey static void 919c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_ipv4(const struct nf_conntrack_tuple *tuple, 929c26ba9bSPaul Blakey struct nf_conntrack_tuple target, 939c26ba9bSPaul Blakey struct flow_action *action) 949c26ba9bSPaul Blakey { 959c26ba9bSPaul Blakey if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3))) 969c26ba9bSPaul Blakey tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4, 979c26ba9bSPaul Blakey offsetof(struct iphdr, saddr), 989c26ba9bSPaul Blakey 0xFFFFFFFF, 999c26ba9bSPaul Blakey be32_to_cpu(target.src.u3.ip)); 1009c26ba9bSPaul Blakey if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3))) 1019c26ba9bSPaul Blakey tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4, 1029c26ba9bSPaul Blakey offsetof(struct iphdr, daddr), 1039c26ba9bSPaul Blakey 0xFFFFFFFF, 1049c26ba9bSPaul Blakey be32_to_cpu(target.dst.u3.ip)); 1059c26ba9bSPaul Blakey } 1069c26ba9bSPaul Blakey 1079c26ba9bSPaul Blakey static void 1089c26ba9bSPaul Blakey tcf_ct_add_ipv6_addr_mangle_action(struct flow_action *action, 1099c26ba9bSPaul Blakey union nf_inet_addr *addr, 1109c26ba9bSPaul Blakey u32 offset) 1119c26ba9bSPaul Blakey { 1129c26ba9bSPaul Blakey int i; 1139c26ba9bSPaul Blakey 1149c26ba9bSPaul Blakey for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++) 1159c26ba9bSPaul Blakey tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP6, 1169c26ba9bSPaul Blakey i * sizeof(u32) + offset, 1179c26ba9bSPaul Blakey 0xFFFFFFFF, be32_to_cpu(addr->ip6[i])); 1189c26ba9bSPaul Blakey } 1199c26ba9bSPaul Blakey 1209c26ba9bSPaul Blakey static void 1219c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_ipv6(const struct nf_conntrack_tuple *tuple, 1229c26ba9bSPaul Blakey struct nf_conntrack_tuple target, 1239c26ba9bSPaul Blakey struct flow_action *action) 1249c26ba9bSPaul Blakey { 1259c26ba9bSPaul Blakey if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3))) 1269c26ba9bSPaul Blakey tcf_ct_add_ipv6_addr_mangle_action(action, &target.src.u3, 1279c26ba9bSPaul Blakey offsetof(struct ipv6hdr, 1289c26ba9bSPaul Blakey saddr)); 1299c26ba9bSPaul Blakey if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3))) 1309c26ba9bSPaul Blakey tcf_ct_add_ipv6_addr_mangle_action(action, &target.dst.u3, 1319c26ba9bSPaul Blakey offsetof(struct ipv6hdr, 1329c26ba9bSPaul Blakey daddr)); 1339c26ba9bSPaul Blakey } 1349c26ba9bSPaul Blakey 1359c26ba9bSPaul Blakey static void 1369c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_tcp(const struct nf_conntrack_tuple *tuple, 1379c26ba9bSPaul Blakey struct nf_conntrack_tuple target, 1389c26ba9bSPaul Blakey struct flow_action *action) 1399c26ba9bSPaul Blakey { 1409c26ba9bSPaul Blakey __be16 target_src = target.src.u.tcp.port; 1419c26ba9bSPaul Blakey __be16 target_dst = target.dst.u.tcp.port; 1429c26ba9bSPaul Blakey 1439c26ba9bSPaul Blakey if (target_src != tuple->src.u.tcp.port) 1449c26ba9bSPaul Blakey tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP, 1459c26ba9bSPaul Blakey offsetof(struct tcphdr, source), 1469c26ba9bSPaul Blakey 0xFFFF, be16_to_cpu(target_src)); 1479c26ba9bSPaul Blakey if (target_dst != tuple->dst.u.tcp.port) 1489c26ba9bSPaul Blakey tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP, 1499c26ba9bSPaul Blakey offsetof(struct tcphdr, dest), 1509c26ba9bSPaul Blakey 0xFFFF, be16_to_cpu(target_dst)); 1519c26ba9bSPaul Blakey } 1529c26ba9bSPaul Blakey 1539c26ba9bSPaul Blakey static void 1549c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_udp(const struct nf_conntrack_tuple *tuple, 1559c26ba9bSPaul Blakey struct nf_conntrack_tuple target, 1569c26ba9bSPaul Blakey struct flow_action *action) 1579c26ba9bSPaul Blakey { 1589c26ba9bSPaul Blakey __be16 target_src = target.src.u.udp.port; 1599c26ba9bSPaul Blakey __be16 target_dst = target.dst.u.udp.port; 1609c26ba9bSPaul Blakey 1619c26ba9bSPaul Blakey if (target_src != tuple->src.u.udp.port) 16247b5d2a1SRoi Dayan tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP, 1639c26ba9bSPaul Blakey offsetof(struct udphdr, source), 1649c26ba9bSPaul Blakey 0xFFFF, be16_to_cpu(target_src)); 1659c26ba9bSPaul Blakey if (target_dst != tuple->dst.u.udp.port) 16647b5d2a1SRoi Dayan tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP, 1679c26ba9bSPaul Blakey offsetof(struct udphdr, dest), 1689c26ba9bSPaul Blakey 0xFFFF, be16_to_cpu(target_dst)); 1699c26ba9bSPaul Blakey } 1709c26ba9bSPaul Blakey 1719c26ba9bSPaul Blakey static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct, 1729c26ba9bSPaul Blakey enum ip_conntrack_dir dir, 173*1a441a9bSVlad Buslov enum ip_conntrack_info ctinfo, 1749c26ba9bSPaul Blakey struct flow_action *action) 1759c26ba9bSPaul Blakey { 1769c26ba9bSPaul Blakey struct nf_conn_labels *ct_labels; 1779c26ba9bSPaul Blakey struct flow_action_entry *entry; 1789c26ba9bSPaul Blakey u32 *act_ct_labels; 1799c26ba9bSPaul Blakey 1809c26ba9bSPaul Blakey entry = tcf_ct_flow_table_flow_action_get_next(action); 1819c26ba9bSPaul Blakey entry->id = FLOW_ACTION_CT_METADATA; 1829c26ba9bSPaul Blakey #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 18352d1aa8bSDaniel Xu entry->ct_metadata.mark = READ_ONCE(ct->mark); 1849c26ba9bSPaul Blakey #endif 18530b0cf90SPaul Blakey /* aligns with the CT reference on the SKB nf_ct_set */ 18630b0cf90SPaul Blakey entry->ct_metadata.cookie = (unsigned long)ct | ctinfo; 187941eff5aSPaul Blakey entry->ct_metadata.orig_dir = dir == IP_CT_DIR_ORIGINAL; 1889c26ba9bSPaul Blakey 1899c26ba9bSPaul Blakey act_ct_labels = entry->ct_metadata.labels; 1909c26ba9bSPaul Blakey ct_labels = nf_ct_labels_find(ct); 1919c26ba9bSPaul Blakey if (ct_labels) 1929c26ba9bSPaul Blakey memcpy(act_ct_labels, ct_labels->bits, NF_CT_LABELS_MAX_SIZE); 1939c26ba9bSPaul Blakey else 1949c26ba9bSPaul Blakey memset(act_ct_labels, 0, NF_CT_LABELS_MAX_SIZE); 1959c26ba9bSPaul Blakey } 1969c26ba9bSPaul Blakey 1979c26ba9bSPaul Blakey static int tcf_ct_flow_table_add_action_nat(struct net *net, 1989c26ba9bSPaul Blakey struct nf_conn *ct, 1999c26ba9bSPaul Blakey enum ip_conntrack_dir dir, 2009c26ba9bSPaul Blakey struct flow_action *action) 2019c26ba9bSPaul Blakey { 2029c26ba9bSPaul Blakey const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple; 2039c26ba9bSPaul Blakey struct nf_conntrack_tuple target; 2049c26ba9bSPaul Blakey 20505aa69e5Swenxu if (!(ct->status & IPS_NAT_MASK)) 20605aa69e5Swenxu return 0; 20705aa69e5Swenxu 2089c26ba9bSPaul Blakey nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple); 2099c26ba9bSPaul Blakey 2109c26ba9bSPaul Blakey switch (tuple->src.l3num) { 2119c26ba9bSPaul Blakey case NFPROTO_IPV4: 2129c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_ipv4(tuple, target, 2139c26ba9bSPaul Blakey action); 2149c26ba9bSPaul Blakey break; 2159c26ba9bSPaul Blakey case NFPROTO_IPV6: 2169c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_ipv6(tuple, target, 2179c26ba9bSPaul Blakey action); 2189c26ba9bSPaul Blakey break; 2199c26ba9bSPaul Blakey default: 2209c26ba9bSPaul Blakey return -EOPNOTSUPP; 2219c26ba9bSPaul Blakey } 2229c26ba9bSPaul Blakey 2239c26ba9bSPaul Blakey switch (nf_ct_protonum(ct)) { 2249c26ba9bSPaul Blakey case IPPROTO_TCP: 2259c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_tcp(tuple, target, action); 2269c26ba9bSPaul Blakey break; 2279c26ba9bSPaul Blakey case IPPROTO_UDP: 2289c26ba9bSPaul Blakey tcf_ct_flow_table_add_action_nat_udp(tuple, target, action); 2299c26ba9bSPaul Blakey break; 2309c26ba9bSPaul Blakey default: 2319c26ba9bSPaul Blakey return -EOPNOTSUPP; 2329c26ba9bSPaul Blakey } 2339c26ba9bSPaul Blakey 2349c26ba9bSPaul Blakey return 0; 2359c26ba9bSPaul Blakey } 2369c26ba9bSPaul Blakey 2379c26ba9bSPaul Blakey static int tcf_ct_flow_table_fill_actions(struct net *net, 238*1a441a9bSVlad Buslov struct flow_offload *flow, 2399c26ba9bSPaul Blakey enum flow_offload_tuple_dir tdir, 2409c26ba9bSPaul Blakey struct nf_flow_rule *flow_rule) 2419c26ba9bSPaul Blakey { 2429c26ba9bSPaul Blakey struct flow_action *action = &flow_rule->rule->action; 2439c26ba9bSPaul Blakey int num_entries = action->num_entries; 2449c26ba9bSPaul Blakey struct nf_conn *ct = flow->ct; 245*1a441a9bSVlad Buslov enum ip_conntrack_info ctinfo; 2469c26ba9bSPaul Blakey enum ip_conntrack_dir dir; 2479c26ba9bSPaul Blakey int i, err; 2489c26ba9bSPaul Blakey 2499c26ba9bSPaul Blakey switch (tdir) { 2509c26ba9bSPaul Blakey case FLOW_OFFLOAD_DIR_ORIGINAL: 2519c26ba9bSPaul Blakey dir = IP_CT_DIR_ORIGINAL; 252*1a441a9bSVlad Buslov ctinfo = IP_CT_ESTABLISHED; 253*1a441a9bSVlad Buslov set_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags); 2549c26ba9bSPaul Blakey break; 2559c26ba9bSPaul Blakey case FLOW_OFFLOAD_DIR_REPLY: 2569c26ba9bSPaul Blakey dir = IP_CT_DIR_REPLY; 257*1a441a9bSVlad Buslov ctinfo = IP_CT_ESTABLISHED_REPLY; 2589c26ba9bSPaul Blakey break; 2599c26ba9bSPaul Blakey default: 2609c26ba9bSPaul Blakey return -EOPNOTSUPP; 2619c26ba9bSPaul Blakey } 2629c26ba9bSPaul Blakey 2639c26ba9bSPaul Blakey err = tcf_ct_flow_table_add_action_nat(net, ct, dir, action); 2649c26ba9bSPaul Blakey if (err) 2659c26ba9bSPaul Blakey goto err_nat; 2669c26ba9bSPaul Blakey 267*1a441a9bSVlad Buslov tcf_ct_flow_table_add_action_meta(ct, dir, ctinfo, action); 2689c26ba9bSPaul Blakey return 0; 2699c26ba9bSPaul Blakey 2709c26ba9bSPaul Blakey err_nat: 2719c26ba9bSPaul Blakey /* Clear filled actions */ 2729c26ba9bSPaul Blakey for (i = num_entries; i < action->num_entries; i++) 2739c26ba9bSPaul Blakey memset(&action->entries[i], 0, sizeof(action->entries[i])); 2749c26ba9bSPaul Blakey action->num_entries = num_entries; 2759c26ba9bSPaul Blakey 2769c26ba9bSPaul Blakey return err; 2779c26ba9bSPaul Blakey } 2789c26ba9bSPaul Blakey 279c34b961aSPaul Blakey static struct nf_flowtable_type flowtable_ct = { 2809c26ba9bSPaul Blakey .action = tcf_ct_flow_table_fill_actions, 281c34b961aSPaul Blakey .owner = THIS_MODULE, 282c34b961aSPaul Blakey }; 283c34b961aSPaul Blakey 284fc54d906SVlad Buslov static int tcf_ct_flow_table_get(struct net *net, struct tcf_ct_params *params) 285c34b961aSPaul Blakey { 286c34b961aSPaul Blakey struct tcf_ct_flow_table *ct_ft; 287c34b961aSPaul Blakey int err = -ENOMEM; 288c34b961aSPaul Blakey 289138470a9SEric Dumazet mutex_lock(&zones_mutex); 290c34b961aSPaul Blakey ct_ft = rhashtable_lookup_fast(&zones_ht, ¶ms->zone, zones_params); 291138470a9SEric Dumazet if (ct_ft && refcount_inc_not_zero(&ct_ft->ref)) 292138470a9SEric Dumazet goto out_unlock; 293c34b961aSPaul Blakey 294138470a9SEric Dumazet ct_ft = kzalloc(sizeof(*ct_ft), GFP_KERNEL); 295c34b961aSPaul Blakey if (!ct_ft) 296c34b961aSPaul Blakey goto err_alloc; 297138470a9SEric Dumazet refcount_set(&ct_ft->ref, 1); 298c34b961aSPaul Blakey 299c34b961aSPaul Blakey ct_ft->zone = params->zone; 300c34b961aSPaul Blakey err = rhashtable_insert_fast(&zones_ht, &ct_ft->node, zones_params); 301c34b961aSPaul Blakey if (err) 302c34b961aSPaul Blakey goto err_insert; 303c34b961aSPaul Blakey 304c34b961aSPaul Blakey ct_ft->nf_ft.type = &flowtable_ct; 3053567e233SMarcelo Ricardo Leitner ct_ft->nf_ft.flags |= NF_FLOWTABLE_HW_OFFLOAD | 3063567e233SMarcelo Ricardo Leitner NF_FLOWTABLE_COUNTER; 307c34b961aSPaul Blakey err = nf_flow_table_init(&ct_ft->nf_ft); 308c34b961aSPaul Blakey if (err) 309c34b961aSPaul Blakey goto err_init; 310fc54d906SVlad Buslov write_pnet(&ct_ft->nf_ft.net, net); 311c34b961aSPaul Blakey 312c34b961aSPaul Blakey __module_get(THIS_MODULE); 313138470a9SEric Dumazet out_unlock: 314c34b961aSPaul Blakey params->ct_ft = ct_ft; 315edd5861eSPaul Blakey params->nf_ft = &ct_ft->nf_ft; 316138470a9SEric Dumazet mutex_unlock(&zones_mutex); 317c34b961aSPaul Blakey 318c34b961aSPaul Blakey return 0; 319c34b961aSPaul Blakey 320c34b961aSPaul Blakey err_init: 321c34b961aSPaul Blakey rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params); 322c34b961aSPaul Blakey err_insert: 323c34b961aSPaul Blakey kfree(ct_ft); 324c34b961aSPaul Blakey err_alloc: 325138470a9SEric Dumazet mutex_unlock(&zones_mutex); 326c34b961aSPaul Blakey return err; 327c34b961aSPaul Blakey } 328c34b961aSPaul Blakey 329c34b961aSPaul Blakey static void tcf_ct_flow_table_cleanup_work(struct work_struct *work) 330c34b961aSPaul Blakey { 33177ac5e40SLouis Peens struct flow_block_cb *block_cb, *tmp_cb; 332c34b961aSPaul Blakey struct tcf_ct_flow_table *ct_ft; 33377ac5e40SLouis Peens struct flow_block *block; 334c34b961aSPaul Blakey 335c34b961aSPaul Blakey ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table, 336c34b961aSPaul Blakey rwork); 337c34b961aSPaul Blakey nf_flow_table_free(&ct_ft->nf_ft); 33877ac5e40SLouis Peens 33977ac5e40SLouis Peens /* Remove any remaining callbacks before cleanup */ 34077ac5e40SLouis Peens block = &ct_ft->nf_ft.flow_block; 34177ac5e40SLouis Peens down_write(&ct_ft->nf_ft.flow_block_lock); 34277ac5e40SLouis Peens list_for_each_entry_safe(block_cb, tmp_cb, &block->cb_list, list) { 34377ac5e40SLouis Peens list_del(&block_cb->list); 34477ac5e40SLouis Peens flow_block_cb_free(block_cb); 34577ac5e40SLouis Peens } 34677ac5e40SLouis Peens up_write(&ct_ft->nf_ft.flow_block_lock); 347c34b961aSPaul Blakey kfree(ct_ft); 348c34b961aSPaul Blakey 349c34b961aSPaul Blakey module_put(THIS_MODULE); 350c34b961aSPaul Blakey } 351c34b961aSPaul Blakey 35219138941SXin Long static void tcf_ct_flow_table_put(struct tcf_ct_flow_table *ct_ft) 353c34b961aSPaul Blakey { 35419138941SXin Long if (refcount_dec_and_test(&ct_ft->ref)) { 355c34b961aSPaul Blakey rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params); 356c34b961aSPaul Blakey INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work); 357c34b961aSPaul Blakey queue_rcu_work(act_ct_wq, &ct_ft->rwork); 358c34b961aSPaul Blakey } 359c34b961aSPaul Blakey } 360c34b961aSPaul Blakey 361db6140e5SPaul Blakey static void tcf_ct_flow_tc_ifidx(struct flow_offload *entry, 362db6140e5SPaul Blakey struct nf_conn_act_ct_ext *act_ct_ext, u8 dir) 363db6140e5SPaul Blakey { 364db6140e5SPaul Blakey entry->tuplehash[dir].tuple.xmit_type = FLOW_OFFLOAD_XMIT_TC; 365db6140e5SPaul Blakey entry->tuplehash[dir].tuple.tc.iifidx = act_ct_ext->ifindex[dir]; 366db6140e5SPaul Blakey } 367db6140e5SPaul Blakey 36864ff70b8SPaul Blakey static void tcf_ct_flow_table_add(struct tcf_ct_flow_table *ct_ft, 36964ff70b8SPaul Blakey struct nf_conn *ct, 37064ff70b8SPaul Blakey bool tcp) 37164ff70b8SPaul Blakey { 3729795ded7SPaul Blakey struct nf_conn_act_ct_ext *act_ct_ext; 37364ff70b8SPaul Blakey struct flow_offload *entry; 37464ff70b8SPaul Blakey int err; 37564ff70b8SPaul Blakey 37664ff70b8SPaul Blakey if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status)) 37764ff70b8SPaul Blakey return; 37864ff70b8SPaul Blakey 37964ff70b8SPaul Blakey entry = flow_offload_alloc(ct); 38064ff70b8SPaul Blakey if (!entry) { 38164ff70b8SPaul Blakey WARN_ON_ONCE(1); 38264ff70b8SPaul Blakey goto err_alloc; 38364ff70b8SPaul Blakey } 38464ff70b8SPaul Blakey 38564ff70b8SPaul Blakey if (tcp) { 38664ff70b8SPaul Blakey ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL; 38764ff70b8SPaul Blakey ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL; 38864ff70b8SPaul Blakey } 38964ff70b8SPaul Blakey 3909795ded7SPaul Blakey act_ct_ext = nf_conn_act_ct_ext_find(ct); 3919795ded7SPaul Blakey if (act_ct_ext) { 392db6140e5SPaul Blakey tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL); 393db6140e5SPaul Blakey tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY); 3949795ded7SPaul Blakey } 3959795ded7SPaul Blakey 39664ff70b8SPaul Blakey err = flow_offload_add(&ct_ft->nf_ft, entry); 39764ff70b8SPaul Blakey if (err) 39864ff70b8SPaul Blakey goto err_add; 39964ff70b8SPaul Blakey 40064ff70b8SPaul Blakey return; 40164ff70b8SPaul Blakey 40264ff70b8SPaul Blakey err_add: 40364ff70b8SPaul Blakey flow_offload_free(entry); 40464ff70b8SPaul Blakey err_alloc: 40564ff70b8SPaul Blakey clear_bit(IPS_OFFLOAD_BIT, &ct->status); 40664ff70b8SPaul Blakey } 40764ff70b8SPaul Blakey 40864ff70b8SPaul Blakey static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft, 40964ff70b8SPaul Blakey struct nf_conn *ct, 41064ff70b8SPaul Blakey enum ip_conntrack_info ctinfo) 41164ff70b8SPaul Blakey { 41264ff70b8SPaul Blakey bool tcp = false; 41364ff70b8SPaul Blakey 41443332cf9SChris Mi if ((ctinfo != IP_CT_ESTABLISHED && ctinfo != IP_CT_ESTABLISHED_REPLY) || 41543332cf9SChris Mi !test_bit(IPS_ASSURED_BIT, &ct->status)) 41664ff70b8SPaul Blakey return; 41764ff70b8SPaul Blakey 41864ff70b8SPaul Blakey switch (nf_ct_protonum(ct)) { 41964ff70b8SPaul Blakey case IPPROTO_TCP: 42064ff70b8SPaul Blakey tcp = true; 42164ff70b8SPaul Blakey if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED) 42264ff70b8SPaul Blakey return; 42364ff70b8SPaul Blakey break; 42464ff70b8SPaul Blakey case IPPROTO_UDP: 42564ff70b8SPaul Blakey break; 426fcb6aa86SToshiaki Makita #ifdef CONFIG_NF_CT_PROTO_GRE 427fcb6aa86SToshiaki Makita case IPPROTO_GRE: { 428fcb6aa86SToshiaki Makita struct nf_conntrack_tuple *tuple; 429fcb6aa86SToshiaki Makita 430fcb6aa86SToshiaki Makita if (ct->status & IPS_NAT_MASK) 431fcb6aa86SToshiaki Makita return; 432fcb6aa86SToshiaki Makita tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; 433fcb6aa86SToshiaki Makita /* No support for GRE v1 */ 434fcb6aa86SToshiaki Makita if (tuple->src.u.gre.key || tuple->dst.u.gre.key) 435fcb6aa86SToshiaki Makita return; 436fcb6aa86SToshiaki Makita break; 437fcb6aa86SToshiaki Makita } 438fcb6aa86SToshiaki Makita #endif 43964ff70b8SPaul Blakey default: 44064ff70b8SPaul Blakey return; 44164ff70b8SPaul Blakey } 44264ff70b8SPaul Blakey 44364ff70b8SPaul Blakey if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) || 44464ff70b8SPaul Blakey ct->status & IPS_SEQ_ADJUST) 44564ff70b8SPaul Blakey return; 44664ff70b8SPaul Blakey 44764ff70b8SPaul Blakey tcf_ct_flow_table_add(ct_ft, ct, tcp); 44864ff70b8SPaul Blakey } 44964ff70b8SPaul Blakey 45046475bb2SPaul Blakey static bool 45146475bb2SPaul Blakey tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb, 45207ac9d16SPaul Blakey struct flow_offload_tuple *tuple, 45307ac9d16SPaul Blakey struct tcphdr **tcph) 45446475bb2SPaul Blakey { 45546475bb2SPaul Blakey struct flow_ports *ports; 45646475bb2SPaul Blakey unsigned int thoff; 45746475bb2SPaul Blakey struct iphdr *iph; 458fcb6aa86SToshiaki Makita size_t hdrsize; 459fcb6aa86SToshiaki Makita u8 ipproto; 46046475bb2SPaul Blakey 4614cc5fdecSPaul Blakey if (!pskb_network_may_pull(skb, sizeof(*iph))) 46246475bb2SPaul Blakey return false; 46346475bb2SPaul Blakey 46446475bb2SPaul Blakey iph = ip_hdr(skb); 46546475bb2SPaul Blakey thoff = iph->ihl * 4; 46646475bb2SPaul Blakey 46746475bb2SPaul Blakey if (ip_is_fragment(iph) || 46846475bb2SPaul Blakey unlikely(thoff != sizeof(struct iphdr))) 46946475bb2SPaul Blakey return false; 47046475bb2SPaul Blakey 471fcb6aa86SToshiaki Makita ipproto = iph->protocol; 472fcb6aa86SToshiaki Makita switch (ipproto) { 473fcb6aa86SToshiaki Makita case IPPROTO_TCP: 474fcb6aa86SToshiaki Makita hdrsize = sizeof(struct tcphdr); 475fcb6aa86SToshiaki Makita break; 476fcb6aa86SToshiaki Makita case IPPROTO_UDP: 477fcb6aa86SToshiaki Makita hdrsize = sizeof(*ports); 478fcb6aa86SToshiaki Makita break; 479fcb6aa86SToshiaki Makita #ifdef CONFIG_NF_CT_PROTO_GRE 480fcb6aa86SToshiaki Makita case IPPROTO_GRE: 481fcb6aa86SToshiaki Makita hdrsize = sizeof(struct gre_base_hdr); 482fcb6aa86SToshiaki Makita break; 483fcb6aa86SToshiaki Makita #endif 484fcb6aa86SToshiaki Makita default: 48546475bb2SPaul Blakey return false; 486fcb6aa86SToshiaki Makita } 48746475bb2SPaul Blakey 48846475bb2SPaul Blakey if (iph->ttl <= 1) 48946475bb2SPaul Blakey return false; 49046475bb2SPaul Blakey 491fcb6aa86SToshiaki Makita if (!pskb_network_may_pull(skb, thoff + hdrsize)) 49246475bb2SPaul Blakey return false; 49346475bb2SPaul Blakey 494fcb6aa86SToshiaki Makita switch (ipproto) { 495fcb6aa86SToshiaki Makita case IPPROTO_TCP: 49607ac9d16SPaul Blakey *tcph = (void *)(skb_network_header(skb) + thoff); 497fcb6aa86SToshiaki Makita fallthrough; 498fcb6aa86SToshiaki Makita case IPPROTO_UDP: 49907ac9d16SPaul Blakey ports = (struct flow_ports *)(skb_network_header(skb) + thoff); 50046475bb2SPaul Blakey tuple->src_port = ports->source; 50146475bb2SPaul Blakey tuple->dst_port = ports->dest; 502fcb6aa86SToshiaki Makita break; 503fcb6aa86SToshiaki Makita case IPPROTO_GRE: { 504fcb6aa86SToshiaki Makita struct gre_base_hdr *greh; 505fcb6aa86SToshiaki Makita 506fcb6aa86SToshiaki Makita greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff); 507fcb6aa86SToshiaki Makita if ((greh->flags & GRE_VERSION) != GRE_VERSION_0) 508fcb6aa86SToshiaki Makita return false; 509fcb6aa86SToshiaki Makita break; 510fcb6aa86SToshiaki Makita } 511fcb6aa86SToshiaki Makita } 512fcb6aa86SToshiaki Makita 513fcb6aa86SToshiaki Makita iph = ip_hdr(skb); 514fcb6aa86SToshiaki Makita 515fcb6aa86SToshiaki Makita tuple->src_v4.s_addr = iph->saddr; 516fcb6aa86SToshiaki Makita tuple->dst_v4.s_addr = iph->daddr; 51746475bb2SPaul Blakey tuple->l3proto = AF_INET; 518fcb6aa86SToshiaki Makita tuple->l4proto = ipproto; 51946475bb2SPaul Blakey 52046475bb2SPaul Blakey return true; 52146475bb2SPaul Blakey } 52246475bb2SPaul Blakey 52346475bb2SPaul Blakey static bool 52446475bb2SPaul Blakey tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb, 52507ac9d16SPaul Blakey struct flow_offload_tuple *tuple, 52607ac9d16SPaul Blakey struct tcphdr **tcph) 52746475bb2SPaul Blakey { 52846475bb2SPaul Blakey struct flow_ports *ports; 52946475bb2SPaul Blakey struct ipv6hdr *ip6h; 53046475bb2SPaul Blakey unsigned int thoff; 531fcb6aa86SToshiaki Makita size_t hdrsize; 532fcb6aa86SToshiaki Makita u8 nexthdr; 53346475bb2SPaul Blakey 5344cc5fdecSPaul Blakey if (!pskb_network_may_pull(skb, sizeof(*ip6h))) 53546475bb2SPaul Blakey return false; 53646475bb2SPaul Blakey 53746475bb2SPaul Blakey ip6h = ipv6_hdr(skb); 538fcb6aa86SToshiaki Makita thoff = sizeof(*ip6h); 53946475bb2SPaul Blakey 540fcb6aa86SToshiaki Makita nexthdr = ip6h->nexthdr; 541fcb6aa86SToshiaki Makita switch (nexthdr) { 542fcb6aa86SToshiaki Makita case IPPROTO_TCP: 543fcb6aa86SToshiaki Makita hdrsize = sizeof(struct tcphdr); 544fcb6aa86SToshiaki Makita break; 545fcb6aa86SToshiaki Makita case IPPROTO_UDP: 546fcb6aa86SToshiaki Makita hdrsize = sizeof(*ports); 547fcb6aa86SToshiaki Makita break; 548fcb6aa86SToshiaki Makita #ifdef CONFIG_NF_CT_PROTO_GRE 549fcb6aa86SToshiaki Makita case IPPROTO_GRE: 550fcb6aa86SToshiaki Makita hdrsize = sizeof(struct gre_base_hdr); 551fcb6aa86SToshiaki Makita break; 552fcb6aa86SToshiaki Makita #endif 553fcb6aa86SToshiaki Makita default: 55486360030SDan Carpenter return false; 555fcb6aa86SToshiaki Makita } 55646475bb2SPaul Blakey 55746475bb2SPaul Blakey if (ip6h->hop_limit <= 1) 55846475bb2SPaul Blakey return false; 55946475bb2SPaul Blakey 560fcb6aa86SToshiaki Makita if (!pskb_network_may_pull(skb, thoff + hdrsize)) 56146475bb2SPaul Blakey return false; 56246475bb2SPaul Blakey 563fcb6aa86SToshiaki Makita switch (nexthdr) { 564fcb6aa86SToshiaki Makita case IPPROTO_TCP: 56507ac9d16SPaul Blakey *tcph = (void *)(skb_network_header(skb) + thoff); 566fcb6aa86SToshiaki Makita fallthrough; 567fcb6aa86SToshiaki Makita case IPPROTO_UDP: 56807ac9d16SPaul Blakey ports = (struct flow_ports *)(skb_network_header(skb) + thoff); 56946475bb2SPaul Blakey tuple->src_port = ports->source; 57046475bb2SPaul Blakey tuple->dst_port = ports->dest; 571fcb6aa86SToshiaki Makita break; 572fcb6aa86SToshiaki Makita case IPPROTO_GRE: { 573fcb6aa86SToshiaki Makita struct gre_base_hdr *greh; 574fcb6aa86SToshiaki Makita 575fcb6aa86SToshiaki Makita greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff); 576fcb6aa86SToshiaki Makita if ((greh->flags & GRE_VERSION) != GRE_VERSION_0) 577fcb6aa86SToshiaki Makita return false; 578fcb6aa86SToshiaki Makita break; 579fcb6aa86SToshiaki Makita } 580fcb6aa86SToshiaki Makita } 581fcb6aa86SToshiaki Makita 582fcb6aa86SToshiaki Makita ip6h = ipv6_hdr(skb); 583fcb6aa86SToshiaki Makita 584fcb6aa86SToshiaki Makita tuple->src_v6 = ip6h->saddr; 585fcb6aa86SToshiaki Makita tuple->dst_v6 = ip6h->daddr; 58646475bb2SPaul Blakey tuple->l3proto = AF_INET6; 587fcb6aa86SToshiaki Makita tuple->l4proto = nexthdr; 58846475bb2SPaul Blakey 58946475bb2SPaul Blakey return true; 59046475bb2SPaul Blakey } 59146475bb2SPaul Blakey 59246475bb2SPaul Blakey static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p, 59346475bb2SPaul Blakey struct sk_buff *skb, 59446475bb2SPaul Blakey u8 family) 59546475bb2SPaul Blakey { 59646475bb2SPaul Blakey struct nf_flowtable *nf_ft = &p->ct_ft->nf_ft; 59746475bb2SPaul Blakey struct flow_offload_tuple_rhash *tuplehash; 59846475bb2SPaul Blakey struct flow_offload_tuple tuple = {}; 59946475bb2SPaul Blakey enum ip_conntrack_info ctinfo; 60007ac9d16SPaul Blakey struct tcphdr *tcph = NULL; 60146475bb2SPaul Blakey struct flow_offload *flow; 60246475bb2SPaul Blakey struct nf_conn *ct; 60346475bb2SPaul Blakey u8 dir; 60446475bb2SPaul Blakey 60546475bb2SPaul Blakey switch (family) { 60646475bb2SPaul Blakey case NFPROTO_IPV4: 60707ac9d16SPaul Blakey if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph)) 60846475bb2SPaul Blakey return false; 60946475bb2SPaul Blakey break; 61046475bb2SPaul Blakey case NFPROTO_IPV6: 61107ac9d16SPaul Blakey if (!tcf_ct_flow_table_fill_tuple_ipv6(skb, &tuple, &tcph)) 61246475bb2SPaul Blakey return false; 61346475bb2SPaul Blakey break; 61446475bb2SPaul Blakey default: 61546475bb2SPaul Blakey return false; 61646475bb2SPaul Blakey } 61746475bb2SPaul Blakey 61846475bb2SPaul Blakey tuplehash = flow_offload_lookup(nf_ft, &tuple); 61946475bb2SPaul Blakey if (!tuplehash) 62046475bb2SPaul Blakey return false; 62146475bb2SPaul Blakey 62246475bb2SPaul Blakey dir = tuplehash->tuple.dir; 62346475bb2SPaul Blakey flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); 62446475bb2SPaul Blakey ct = flow->ct; 62546475bb2SPaul Blakey 62607ac9d16SPaul Blakey if (tcph && (unlikely(tcph->fin || tcph->rst))) { 62707ac9d16SPaul Blakey flow_offload_teardown(flow); 62807ac9d16SPaul Blakey return false; 62907ac9d16SPaul Blakey } 63007ac9d16SPaul Blakey 63146475bb2SPaul Blakey ctinfo = dir == FLOW_OFFLOAD_DIR_ORIGINAL ? IP_CT_ESTABLISHED : 63246475bb2SPaul Blakey IP_CT_ESTABLISHED_REPLY; 63346475bb2SPaul Blakey 6348b3646d6SPaul Blakey flow_offload_refresh(nf_ft, flow); 63546475bb2SPaul Blakey nf_conntrack_get(&ct->ct_general); 63646475bb2SPaul Blakey nf_ct_set(skb, ct, ctinfo); 6373567e233SMarcelo Ricardo Leitner if (nf_ft->flags & NF_FLOWTABLE_COUNTER) 638beb97d3aSwenxu nf_ct_acct_update(ct, dir, skb->len); 63946475bb2SPaul Blakey 64046475bb2SPaul Blakey return true; 64146475bb2SPaul Blakey } 64246475bb2SPaul Blakey 643c34b961aSPaul Blakey static int tcf_ct_flow_tables_init(void) 644c34b961aSPaul Blakey { 645c34b961aSPaul Blakey return rhashtable_init(&zones_ht, &zones_params); 646c34b961aSPaul Blakey } 647c34b961aSPaul Blakey 648c34b961aSPaul Blakey static void tcf_ct_flow_tables_uninit(void) 649c34b961aSPaul Blakey { 650c34b961aSPaul Blakey rhashtable_destroy(&zones_ht); 651c34b961aSPaul Blakey } 652c34b961aSPaul Blakey 653b57dc7c1SPaul Blakey static struct tc_action_ops act_ct_ops; 654b57dc7c1SPaul Blakey 655b57dc7c1SPaul Blakey struct tc_ct_action_net { 656b57dc7c1SPaul Blakey struct tc_action_net tn; /* Must be first */ 657b57dc7c1SPaul Blakey bool labels; 658b57dc7c1SPaul Blakey }; 659b57dc7c1SPaul Blakey 660b57dc7c1SPaul Blakey /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ 661b57dc7c1SPaul Blakey static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb, 662a21b06e7SXin Long struct tcf_ct_params *p) 663b57dc7c1SPaul Blakey { 664b57dc7c1SPaul Blakey enum ip_conntrack_info ctinfo; 665b57dc7c1SPaul Blakey struct nf_conn *ct; 666b57dc7c1SPaul Blakey 667b57dc7c1SPaul Blakey ct = nf_ct_get(skb, &ctinfo); 668b57dc7c1SPaul Blakey if (!ct) 669b57dc7c1SPaul Blakey return false; 670b57dc7c1SPaul Blakey if (!net_eq(net, read_pnet(&ct->ct_net))) 671bcb74e13SMarcelo Ricardo Leitner goto drop_ct; 672a21b06e7SXin Long if (nf_ct_zone(ct)->id != p->zone) 673bcb74e13SMarcelo Ricardo Leitner goto drop_ct; 674a21b06e7SXin Long if (p->helper) { 675a21b06e7SXin Long struct nf_conn_help *help; 676a21b06e7SXin Long 677a21b06e7SXin Long help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER); 678a21b06e7SXin Long if (help && rcu_access_pointer(help->helper) != p->helper) 679a21b06e7SXin Long goto drop_ct; 680a21b06e7SXin Long } 681b57dc7c1SPaul Blakey 682b57dc7c1SPaul Blakey /* Force conntrack entry direction. */ 683a21b06e7SXin Long if ((p->ct_action & TCA_CT_ACT_FORCE) && 684a21b06e7SXin Long CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { 685b57dc7c1SPaul Blakey if (nf_ct_is_confirmed(ct)) 686b57dc7c1SPaul Blakey nf_ct_kill(ct); 687b57dc7c1SPaul Blakey 688bcb74e13SMarcelo Ricardo Leitner goto drop_ct; 689bcb74e13SMarcelo Ricardo Leitner } 690bcb74e13SMarcelo Ricardo Leitner 691bcb74e13SMarcelo Ricardo Leitner return true; 692bcb74e13SMarcelo Ricardo Leitner 693bcb74e13SMarcelo Ricardo Leitner drop_ct: 694408bdcfcSFlorian Westphal nf_ct_put(ct); 695b57dc7c1SPaul Blakey nf_ct_set(skb, NULL, IP_CT_UNTRACKED); 696b57dc7c1SPaul Blakey 697b57dc7c1SPaul Blakey return false; 698b57dc7c1SPaul Blakey } 699b57dc7c1SPaul Blakey 700b57dc7c1SPaul Blakey /* Trim the skb to the length specified by the IP/IPv6 header, 701b57dc7c1SPaul Blakey * removing any trailing lower-layer padding. This prepares the skb 702b57dc7c1SPaul Blakey * for higher-layer processing that assumes skb->len excludes padding 703b57dc7c1SPaul Blakey * (such as nf_ip_checksum). The caller needs to pull the skb to the 704b57dc7c1SPaul Blakey * network header, and ensure ip_hdr/ipv6_hdr points to valid data. 705b57dc7c1SPaul Blakey */ 706b57dc7c1SPaul Blakey static int tcf_ct_skb_network_trim(struct sk_buff *skb, int family) 707b57dc7c1SPaul Blakey { 708b57dc7c1SPaul Blakey unsigned int len; 709b57dc7c1SPaul Blakey 710b57dc7c1SPaul Blakey switch (family) { 711b57dc7c1SPaul Blakey case NFPROTO_IPV4: 712043e397eSXin Long len = skb_ip_totlen(skb); 713b57dc7c1SPaul Blakey break; 714b57dc7c1SPaul Blakey case NFPROTO_IPV6: 715b57dc7c1SPaul Blakey len = sizeof(struct ipv6hdr) 716b57dc7c1SPaul Blakey + ntohs(ipv6_hdr(skb)->payload_len); 717b57dc7c1SPaul Blakey break; 718b57dc7c1SPaul Blakey default: 719b57dc7c1SPaul Blakey len = skb->len; 720b57dc7c1SPaul Blakey } 721b57dc7c1SPaul Blakey 7222a566f01SJinpeng Cui return pskb_trim_rcsum(skb, len); 723b57dc7c1SPaul Blakey } 724b57dc7c1SPaul Blakey 725b57dc7c1SPaul Blakey static u8 tcf_ct_skb_nf_family(struct sk_buff *skb) 726b57dc7c1SPaul Blakey { 727b57dc7c1SPaul Blakey u8 family = NFPROTO_UNSPEC; 728b57dc7c1SPaul Blakey 729d7bf2ebeSToke Høiland-Jørgensen switch (skb_protocol(skb, true)) { 730b57dc7c1SPaul Blakey case htons(ETH_P_IP): 731b57dc7c1SPaul Blakey family = NFPROTO_IPV4; 732b57dc7c1SPaul Blakey break; 733b57dc7c1SPaul Blakey case htons(ETH_P_IPV6): 734b57dc7c1SPaul Blakey family = NFPROTO_IPV6; 735b57dc7c1SPaul Blakey break; 736b57dc7c1SPaul Blakey default: 737b57dc7c1SPaul Blakey break; 738b57dc7c1SPaul Blakey } 739b57dc7c1SPaul Blakey 740b57dc7c1SPaul Blakey return family; 741b57dc7c1SPaul Blakey } 742b57dc7c1SPaul Blakey 743b57dc7c1SPaul Blakey static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag) 744b57dc7c1SPaul Blakey { 745b57dc7c1SPaul Blakey unsigned int len; 746b57dc7c1SPaul Blakey 747b57dc7c1SPaul Blakey len = skb_network_offset(skb) + sizeof(struct iphdr); 748b57dc7c1SPaul Blakey if (unlikely(skb->len < len)) 749b57dc7c1SPaul Blakey return -EINVAL; 750b57dc7c1SPaul Blakey if (unlikely(!pskb_may_pull(skb, len))) 751b57dc7c1SPaul Blakey return -ENOMEM; 752b57dc7c1SPaul Blakey 753b57dc7c1SPaul Blakey *frag = ip_is_fragment(ip_hdr(skb)); 754b57dc7c1SPaul Blakey return 0; 755b57dc7c1SPaul Blakey } 756b57dc7c1SPaul Blakey 757b57dc7c1SPaul Blakey static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag) 758b57dc7c1SPaul Blakey { 759b57dc7c1SPaul Blakey unsigned int flags = 0, len, payload_ofs = 0; 760b57dc7c1SPaul Blakey unsigned short frag_off; 761b57dc7c1SPaul Blakey int nexthdr; 762b57dc7c1SPaul Blakey 763b57dc7c1SPaul Blakey len = skb_network_offset(skb) + sizeof(struct ipv6hdr); 764b57dc7c1SPaul Blakey if (unlikely(skb->len < len)) 765b57dc7c1SPaul Blakey return -EINVAL; 766b57dc7c1SPaul Blakey if (unlikely(!pskb_may_pull(skb, len))) 767b57dc7c1SPaul Blakey return -ENOMEM; 768b57dc7c1SPaul Blakey 769b57dc7c1SPaul Blakey nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags); 770b57dc7c1SPaul Blakey if (unlikely(nexthdr < 0)) 771b57dc7c1SPaul Blakey return -EPROTO; 772b57dc7c1SPaul Blakey 773b57dc7c1SPaul Blakey *frag = flags & IP6_FH_F_FRAG; 774b57dc7c1SPaul Blakey return 0; 775b57dc7c1SPaul Blakey } 776b57dc7c1SPaul Blakey 777b57dc7c1SPaul Blakey static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb, 778ae372cb1Swenxu u8 family, u16 zone, bool *defrag) 779b57dc7c1SPaul Blakey { 780b57dc7c1SPaul Blakey enum ip_conntrack_info ctinfo; 781b57dc7c1SPaul Blakey struct nf_conn *ct; 782b57dc7c1SPaul Blakey int err = 0; 783b57dc7c1SPaul Blakey bool frag; 784ec624fe7SPaul Blakey u16 mru; 785b57dc7c1SPaul Blakey 786b57dc7c1SPaul Blakey /* Previously seen (loopback)? Ignore. */ 787b57dc7c1SPaul Blakey ct = nf_ct_get(skb, &ctinfo); 788b57dc7c1SPaul Blakey if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED) 789b57dc7c1SPaul Blakey return 0; 790b57dc7c1SPaul Blakey 791b57dc7c1SPaul Blakey if (family == NFPROTO_IPV4) 792b57dc7c1SPaul Blakey err = tcf_ct_ipv4_is_fragment(skb, &frag); 793b57dc7c1SPaul Blakey else 794b57dc7c1SPaul Blakey err = tcf_ct_ipv6_is_fragment(skb, &frag); 795b57dc7c1SPaul Blakey if (err || !frag) 796b57dc7c1SPaul Blakey return err; 797b57dc7c1SPaul Blakey 798b57dc7c1SPaul Blakey skb_get(skb); 799ec624fe7SPaul Blakey mru = tc_skb_cb(skb)->mru; 800b57dc7c1SPaul Blakey 801b57dc7c1SPaul Blakey if (family == NFPROTO_IPV4) { 802b57dc7c1SPaul Blakey enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; 803b57dc7c1SPaul Blakey 804b57dc7c1SPaul Blakey memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); 805b57dc7c1SPaul Blakey local_bh_disable(); 806b57dc7c1SPaul Blakey err = ip_defrag(net, skb, user); 807b57dc7c1SPaul Blakey local_bh_enable(); 808b57dc7c1SPaul Blakey if (err && err != -EINPROGRESS) 809eda814b9SAlaa Hleihel return err; 810ae372cb1Swenxu 811038ebb1aSwenxu if (!err) { 812ae372cb1Swenxu *defrag = true; 813ec624fe7SPaul Blakey mru = IPCB(skb)->frag_max_size; 814038ebb1aSwenxu } 815b57dc7c1SPaul Blakey } else { /* NFPROTO_IPV6 */ 816b57dc7c1SPaul Blakey #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) 817b57dc7c1SPaul Blakey enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; 818b57dc7c1SPaul Blakey 819b57dc7c1SPaul Blakey memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); 820b57dc7c1SPaul Blakey err = nf_ct_frag6_gather(net, skb, user); 821b57dc7c1SPaul Blakey if (err && err != -EINPROGRESS) 822b57dc7c1SPaul Blakey goto out_free; 823ae372cb1Swenxu 824038ebb1aSwenxu if (!err) { 825ae372cb1Swenxu *defrag = true; 826ec624fe7SPaul Blakey mru = IP6CB(skb)->frag_max_size; 827038ebb1aSwenxu } 828b57dc7c1SPaul Blakey #else 829b57dc7c1SPaul Blakey err = -EOPNOTSUPP; 830b57dc7c1SPaul Blakey goto out_free; 831b57dc7c1SPaul Blakey #endif 832b57dc7c1SPaul Blakey } 833b57dc7c1SPaul Blakey 834f77bd544SDavide Caratti if (err != -EINPROGRESS) 835ec624fe7SPaul Blakey tc_skb_cb(skb)->mru = mru; 836b57dc7c1SPaul Blakey skb_clear_hash(skb); 837b57dc7c1SPaul Blakey skb->ignore_df = 1; 838b57dc7c1SPaul Blakey return err; 839b57dc7c1SPaul Blakey 840b57dc7c1SPaul Blakey out_free: 841b57dc7c1SPaul Blakey kfree_skb(skb); 842b57dc7c1SPaul Blakey return err; 843b57dc7c1SPaul Blakey } 844b57dc7c1SPaul Blakey 84519138941SXin Long static void tcf_ct_params_free(struct tcf_ct_params *params) 846b57dc7c1SPaul Blakey { 847a21b06e7SXin Long if (params->helper) { 848a21b06e7SXin Long #if IS_ENABLED(CONFIG_NF_NAT) 849a21b06e7SXin Long if (params->ct_action & TCA_CT_ACT_NAT) 850a21b06e7SXin Long nf_nat_helper_put(params->helper); 851a21b06e7SXin Long #endif 852a21b06e7SXin Long nf_conntrack_helper_put(params->helper); 853a21b06e7SXin Long } 85419138941SXin Long if (params->ct_ft) 85519138941SXin Long tcf_ct_flow_table_put(params->ct_ft); 856b57dc7c1SPaul Blakey if (params->tmpl) 857408bdcfcSFlorian Westphal nf_ct_put(params->tmpl); 858b57dc7c1SPaul Blakey kfree(params); 859b57dc7c1SPaul Blakey } 860b57dc7c1SPaul Blakey 86119138941SXin Long static void tcf_ct_params_free_rcu(struct rcu_head *head) 86219138941SXin Long { 86319138941SXin Long struct tcf_ct_params *params; 86419138941SXin Long 86519138941SXin Long params = container_of(head, struct tcf_ct_params, rcu); 86619138941SXin Long tcf_ct_params_free(params); 86719138941SXin Long } 86819138941SXin Long 869b57dc7c1SPaul Blakey static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask) 870b57dc7c1SPaul Blakey { 871b57dc7c1SPaul Blakey #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) 872b57dc7c1SPaul Blakey u32 new_mark; 873b57dc7c1SPaul Blakey 874b57dc7c1SPaul Blakey if (!mask) 875b57dc7c1SPaul Blakey return; 876b57dc7c1SPaul Blakey 87752d1aa8bSDaniel Xu new_mark = mark | (READ_ONCE(ct->mark) & ~(mask)); 87852d1aa8bSDaniel Xu if (READ_ONCE(ct->mark) != new_mark) { 87952d1aa8bSDaniel Xu WRITE_ONCE(ct->mark, new_mark); 880b57dc7c1SPaul Blakey if (nf_ct_is_confirmed(ct)) 881b57dc7c1SPaul Blakey nf_conntrack_event_cache(IPCT_MARK, ct); 882b57dc7c1SPaul Blakey } 883b57dc7c1SPaul Blakey #endif 884b57dc7c1SPaul Blakey } 885b57dc7c1SPaul Blakey 886b57dc7c1SPaul Blakey static void tcf_ct_act_set_labels(struct nf_conn *ct, 887b57dc7c1SPaul Blakey u32 *labels, 888b57dc7c1SPaul Blakey u32 *labels_m) 889b57dc7c1SPaul Blakey { 890b57dc7c1SPaul Blakey #if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) 891c593642cSPankaj Bharadiya size_t labels_sz = sizeof_field(struct tcf_ct_params, labels); 892b57dc7c1SPaul Blakey 893b57dc7c1SPaul Blakey if (!memchr_inv(labels_m, 0, labels_sz)) 894b57dc7c1SPaul Blakey return; 895b57dc7c1SPaul Blakey 896b57dc7c1SPaul Blakey nf_connlabels_replace(ct, labels, labels_m, 4); 897b57dc7c1SPaul Blakey #endif 898b57dc7c1SPaul Blakey } 899b57dc7c1SPaul Blakey 900b57dc7c1SPaul Blakey static int tcf_ct_act_nat(struct sk_buff *skb, 901b57dc7c1SPaul Blakey struct nf_conn *ct, 902b57dc7c1SPaul Blakey enum ip_conntrack_info ctinfo, 903b57dc7c1SPaul Blakey int ct_action, 904b57dc7c1SPaul Blakey struct nf_nat_range2 *range, 905b57dc7c1SPaul Blakey bool commit) 906b57dc7c1SPaul Blakey { 907b57dc7c1SPaul Blakey #if IS_ENABLED(CONFIG_NF_NAT) 908ebddb140SXin Long int err, action = 0; 909b57dc7c1SPaul Blakey 910b57dc7c1SPaul Blakey if (!(ct_action & TCA_CT_ACT_NAT)) 911b57dc7c1SPaul Blakey return NF_ACCEPT; 912ebddb140SXin Long if (ct_action & TCA_CT_ACT_NAT_SRC) 913ebddb140SXin Long action |= BIT(NF_NAT_MANIP_SRC); 914ebddb140SXin Long if (ct_action & TCA_CT_ACT_NAT_DST) 915ebddb140SXin Long action |= BIT(NF_NAT_MANIP_DST); 916b57dc7c1SPaul Blakey 917ebddb140SXin Long err = nf_ct_nat(skb, ct, ctinfo, &action, range, commit); 918b57dc7c1SPaul Blakey 919ebddb140SXin Long if (action & BIT(NF_NAT_MANIP_SRC)) 920ebddb140SXin Long tc_skb_cb(skb)->post_ct_snat = 1; 921ebddb140SXin Long if (action & BIT(NF_NAT_MANIP_DST)) 922ebddb140SXin Long tc_skb_cb(skb)->post_ct_dnat = 1; 923b57dc7c1SPaul Blakey 92495219afbSAaron Conole return err; 925b57dc7c1SPaul Blakey #else 926b57dc7c1SPaul Blakey return NF_ACCEPT; 927b57dc7c1SPaul Blakey #endif 928b57dc7c1SPaul Blakey } 929b57dc7c1SPaul Blakey 930871cf386SPedro Tammela TC_INDIRECT_SCOPE int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a, 931b57dc7c1SPaul Blakey struct tcf_result *res) 932b57dc7c1SPaul Blakey { 933b57dc7c1SPaul Blakey struct net *net = dev_net(skb->dev); 934b57dc7c1SPaul Blakey enum ip_conntrack_info ctinfo; 935b57dc7c1SPaul Blakey struct tcf_ct *c = to_ct(a); 936b57dc7c1SPaul Blakey struct nf_conn *tmpl = NULL; 937b57dc7c1SPaul Blakey struct nf_hook_state state; 938a21b06e7SXin Long bool cached, commit, clear; 939b57dc7c1SPaul Blakey int nh_ofs, err, retval; 940b57dc7c1SPaul Blakey struct tcf_ct_params *p; 941a21b06e7SXin Long bool add_helper = false; 94246475bb2SPaul Blakey bool skip_add = false; 943ae372cb1Swenxu bool defrag = false; 944b57dc7c1SPaul Blakey struct nf_conn *ct; 945b57dc7c1SPaul Blakey u8 family; 946b57dc7c1SPaul Blakey 947b57dc7c1SPaul Blakey p = rcu_dereference_bh(c->params); 948b57dc7c1SPaul Blakey 949b57dc7c1SPaul Blakey retval = READ_ONCE(c->tcf_action); 950b57dc7c1SPaul Blakey commit = p->ct_action & TCA_CT_ACT_COMMIT; 951b57dc7c1SPaul Blakey clear = p->ct_action & TCA_CT_ACT_CLEAR; 952b57dc7c1SPaul Blakey tmpl = p->tmpl; 953b57dc7c1SPaul Blakey 9548367b3abSwenxu tcf_lastuse_update(&c->tcf_tm); 9552dc4e9e8SPaul Blakey tcf_action_update_bstats(&c->common, skb); 9568367b3abSwenxu 957b57dc7c1SPaul Blakey if (clear) { 958ec624fe7SPaul Blakey tc_skb_cb(skb)->post_ct = false; 959b57dc7c1SPaul Blakey ct = nf_ct_get(skb, &ctinfo); 960b57dc7c1SPaul Blakey if (ct) { 961408bdcfcSFlorian Westphal nf_ct_put(ct); 962b57dc7c1SPaul Blakey nf_ct_set(skb, NULL, IP_CT_UNTRACKED); 963b57dc7c1SPaul Blakey } 964b57dc7c1SPaul Blakey 9658ca1b090SMarcelo Ricardo Leitner goto out_clear; 966b57dc7c1SPaul Blakey } 967b57dc7c1SPaul Blakey 968b57dc7c1SPaul Blakey family = tcf_ct_skb_nf_family(skb); 969b57dc7c1SPaul Blakey if (family == NFPROTO_UNSPEC) 970b57dc7c1SPaul Blakey goto drop; 971b57dc7c1SPaul Blakey 972b57dc7c1SPaul Blakey /* The conntrack module expects to be working at L3. 973b57dc7c1SPaul Blakey * We also try to pull the IPv4/6 header to linear area 974b57dc7c1SPaul Blakey */ 975b57dc7c1SPaul Blakey nh_ofs = skb_network_offset(skb); 976b57dc7c1SPaul Blakey skb_pull_rcsum(skb, nh_ofs); 977ae372cb1Swenxu err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag); 978b57dc7c1SPaul Blakey if (err == -EINPROGRESS) { 979b57dc7c1SPaul Blakey retval = TC_ACT_STOLEN; 980f77bd544SDavide Caratti goto out_clear; 981b57dc7c1SPaul Blakey } 982b57dc7c1SPaul Blakey if (err) 983b57dc7c1SPaul Blakey goto drop; 984b57dc7c1SPaul Blakey 985b57dc7c1SPaul Blakey err = tcf_ct_skb_network_trim(skb, family); 986b57dc7c1SPaul Blakey if (err) 987b57dc7c1SPaul Blakey goto drop; 988b57dc7c1SPaul Blakey 989b57dc7c1SPaul Blakey /* If we are recirculating packets to match on ct fields and 990b57dc7c1SPaul Blakey * committing with a separate ct action, then we don't need to 991b57dc7c1SPaul Blakey * actually run the packet through conntrack twice unless it's for a 992b57dc7c1SPaul Blakey * different zone. 993b57dc7c1SPaul Blakey */ 994a21b06e7SXin Long cached = tcf_ct_skb_nfct_cached(net, skb, p); 995b57dc7c1SPaul Blakey if (!cached) { 9960cc254e5SPaul Blakey if (tcf_ct_flow_table_lookup(p, skb, family)) { 99746475bb2SPaul Blakey skip_add = true; 99846475bb2SPaul Blakey goto do_nat; 99946475bb2SPaul Blakey } 100046475bb2SPaul Blakey 1001b57dc7c1SPaul Blakey /* Associate skb with specified zone. */ 1002b57dc7c1SPaul Blakey if (tmpl) { 1003b57dc7c1SPaul Blakey nf_conntrack_put(skb_nfct(skb)); 1004b57dc7c1SPaul Blakey nf_conntrack_get(&tmpl->ct_general); 1005b57dc7c1SPaul Blakey nf_ct_set(skb, tmpl, IP_CT_NEW); 1006b57dc7c1SPaul Blakey } 1007b57dc7c1SPaul Blakey 1008b57dc7c1SPaul Blakey state.hook = NF_INET_PRE_ROUTING; 1009b57dc7c1SPaul Blakey state.net = net; 1010b57dc7c1SPaul Blakey state.pf = family; 1011b57dc7c1SPaul Blakey err = nf_conntrack_in(skb, &state); 1012b57dc7c1SPaul Blakey if (err != NF_ACCEPT) 1013b57dc7c1SPaul Blakey goto out_push; 1014b57dc7c1SPaul Blakey } 1015b57dc7c1SPaul Blakey 101646475bb2SPaul Blakey do_nat: 1017b57dc7c1SPaul Blakey ct = nf_ct_get(skb, &ctinfo); 1018b57dc7c1SPaul Blakey if (!ct) 1019b57dc7c1SPaul Blakey goto out_push; 1020b57dc7c1SPaul Blakey nf_ct_deliver_cached_events(ct); 10219795ded7SPaul Blakey nf_conn_act_ct_ext_fill(skb, ct, ctinfo); 1022b57dc7c1SPaul Blakey 1023b57dc7c1SPaul Blakey err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit); 1024b57dc7c1SPaul Blakey if (err != NF_ACCEPT) 1025b57dc7c1SPaul Blakey goto drop; 1026b57dc7c1SPaul Blakey 1027a21b06e7SXin Long if (!nf_ct_is_confirmed(ct) && commit && p->helper && !nfct_help(ct)) { 1028a21b06e7SXin Long err = __nf_ct_try_assign_helper(ct, p->tmpl, GFP_ATOMIC); 1029a21b06e7SXin Long if (err) 1030a21b06e7SXin Long goto drop; 1031a21b06e7SXin Long add_helper = true; 1032a21b06e7SXin Long if (p->ct_action & TCA_CT_ACT_NAT && !nfct_seqadj(ct)) { 1033a21b06e7SXin Long if (!nfct_seqadj_ext_add(ct)) 1034a21b06e7SXin Long goto drop; 1035a21b06e7SXin Long } 1036a21b06e7SXin Long } 1037a21b06e7SXin Long 1038a21b06e7SXin Long if (nf_ct_is_confirmed(ct) ? ((!cached && !skip_add) || add_helper) : commit) { 1039a21b06e7SXin Long if (nf_ct_helper(skb, ct, ctinfo, family) != NF_ACCEPT) 1040a21b06e7SXin Long goto drop; 1041a21b06e7SXin Long } 1042a21b06e7SXin Long 1043b57dc7c1SPaul Blakey if (commit) { 1044b57dc7c1SPaul Blakey tcf_ct_act_set_mark(ct, p->mark, p->mark_mask); 1045b57dc7c1SPaul Blakey tcf_ct_act_set_labels(ct, p->labels, p->labels_mask); 1046b57dc7c1SPaul Blakey 10479795ded7SPaul Blakey if (!nf_ct_is_confirmed(ct)) 10489795ded7SPaul Blakey nf_conn_act_ct_ext_add(ct); 10499795ded7SPaul Blakey 1050b57dc7c1SPaul Blakey /* This will take care of sending queued events 1051b57dc7c1SPaul Blakey * even if the connection is already confirmed. 1052b57dc7c1SPaul Blakey */ 10538955b90cSwenxu if (nf_conntrack_confirm(skb) != NF_ACCEPT) 10548955b90cSwenxu goto drop; 105546475bb2SPaul Blakey } 105664ff70b8SPaul Blakey 10570cc254e5SPaul Blakey if (!skip_add) 10580cc254e5SPaul Blakey tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo); 10590cc254e5SPaul Blakey 1060b57dc7c1SPaul Blakey out_push: 1061b57dc7c1SPaul Blakey skb_push_rcsum(skb, nh_ofs); 1062b57dc7c1SPaul Blakey 1063ec624fe7SPaul Blakey tc_skb_cb(skb)->post_ct = true; 106438495958SPaul Blakey tc_skb_cb(skb)->zone = p->zone; 10658ca1b090SMarcelo Ricardo Leitner out_clear: 1066ae372cb1Swenxu if (defrag) 1067ae372cb1Swenxu qdisc_skb_cb(skb)->pkt_len = skb->len; 1068b57dc7c1SPaul Blakey return retval; 1069b57dc7c1SPaul Blakey 1070b57dc7c1SPaul Blakey drop: 107126b537a8SVlad Buslov tcf_action_inc_drop_qstats(&c->common); 1072b57dc7c1SPaul Blakey return TC_ACT_SHOT; 1073b57dc7c1SPaul Blakey } 1074b57dc7c1SPaul Blakey 1075b57dc7c1SPaul Blakey static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = { 1076b57dc7c1SPaul Blakey [TCA_CT_ACTION] = { .type = NLA_U16 }, 10778140860cSJohannes Berg [TCA_CT_PARMS] = NLA_POLICY_EXACT_LEN(sizeof(struct tc_ct)), 1078b57dc7c1SPaul Blakey [TCA_CT_ZONE] = { .type = NLA_U16 }, 1079b57dc7c1SPaul Blakey [TCA_CT_MARK] = { .type = NLA_U32 }, 1080b57dc7c1SPaul Blakey [TCA_CT_MARK_MASK] = { .type = NLA_U32 }, 1081b57dc7c1SPaul Blakey [TCA_CT_LABELS] = { .type = NLA_BINARY, 1082b57dc7c1SPaul Blakey .len = 128 / BITS_PER_BYTE }, 1083b57dc7c1SPaul Blakey [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY, 1084b57dc7c1SPaul Blakey .len = 128 / BITS_PER_BYTE }, 1085b57dc7c1SPaul Blakey [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 }, 1086b57dc7c1SPaul Blakey [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 }, 10878140860cSJohannes Berg [TCA_CT_NAT_IPV6_MIN] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)), 10888140860cSJohannes Berg [TCA_CT_NAT_IPV6_MAX] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)), 1089b57dc7c1SPaul Blakey [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 }, 1090b57dc7c1SPaul Blakey [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 }, 1091a21b06e7SXin Long [TCA_CT_HELPER_NAME] = { .type = NLA_STRING, .len = NF_CT_HELPER_NAME_LEN }, 1092a21b06e7SXin Long [TCA_CT_HELPER_FAMILY] = { .type = NLA_U8 }, 1093a21b06e7SXin Long [TCA_CT_HELPER_PROTO] = { .type = NLA_U8 }, 1094b57dc7c1SPaul Blakey }; 1095b57dc7c1SPaul Blakey 1096b57dc7c1SPaul Blakey static int tcf_ct_fill_params_nat(struct tcf_ct_params *p, 1097b57dc7c1SPaul Blakey struct tc_ct *parm, 1098b57dc7c1SPaul Blakey struct nlattr **tb, 1099b57dc7c1SPaul Blakey struct netlink_ext_ack *extack) 1100b57dc7c1SPaul Blakey { 1101b57dc7c1SPaul Blakey struct nf_nat_range2 *range; 1102b57dc7c1SPaul Blakey 1103b57dc7c1SPaul Blakey if (!(p->ct_action & TCA_CT_ACT_NAT)) 1104b57dc7c1SPaul Blakey return 0; 1105b57dc7c1SPaul Blakey 1106b57dc7c1SPaul Blakey if (!IS_ENABLED(CONFIG_NF_NAT)) { 1107b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel"); 1108b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1109b57dc7c1SPaul Blakey } 1110b57dc7c1SPaul Blakey 1111b57dc7c1SPaul Blakey if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST))) 1112b57dc7c1SPaul Blakey return 0; 1113b57dc7c1SPaul Blakey 1114b57dc7c1SPaul Blakey if ((p->ct_action & TCA_CT_ACT_NAT_SRC) && 1115b57dc7c1SPaul Blakey (p->ct_action & TCA_CT_ACT_NAT_DST)) { 1116b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time"); 1117b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1118b57dc7c1SPaul Blakey } 1119b57dc7c1SPaul Blakey 1120b57dc7c1SPaul Blakey range = &p->range; 1121b57dc7c1SPaul Blakey if (tb[TCA_CT_NAT_IPV4_MIN]) { 1122b57dc7c1SPaul Blakey struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX]; 1123b57dc7c1SPaul Blakey 1124b57dc7c1SPaul Blakey p->ipv4_range = true; 1125b57dc7c1SPaul Blakey range->flags |= NF_NAT_RANGE_MAP_IPS; 1126b57dc7c1SPaul Blakey range->min_addr.ip = 1127b57dc7c1SPaul Blakey nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]); 1128b57dc7c1SPaul Blakey 1129b57dc7c1SPaul Blakey range->max_addr.ip = max_attr ? 1130b57dc7c1SPaul Blakey nla_get_in_addr(max_attr) : 1131b57dc7c1SPaul Blakey range->min_addr.ip; 1132b57dc7c1SPaul Blakey } else if (tb[TCA_CT_NAT_IPV6_MIN]) { 1133b57dc7c1SPaul Blakey struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX]; 1134b57dc7c1SPaul Blakey 1135b57dc7c1SPaul Blakey p->ipv4_range = false; 1136b57dc7c1SPaul Blakey range->flags |= NF_NAT_RANGE_MAP_IPS; 1137b57dc7c1SPaul Blakey range->min_addr.in6 = 1138b57dc7c1SPaul Blakey nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]); 1139b57dc7c1SPaul Blakey 1140b57dc7c1SPaul Blakey range->max_addr.in6 = max_attr ? 1141b57dc7c1SPaul Blakey nla_get_in6_addr(max_attr) : 1142b57dc7c1SPaul Blakey range->min_addr.in6; 1143b57dc7c1SPaul Blakey } 1144b57dc7c1SPaul Blakey 1145b57dc7c1SPaul Blakey if (tb[TCA_CT_NAT_PORT_MIN]) { 1146b57dc7c1SPaul Blakey range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED; 1147b57dc7c1SPaul Blakey range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]); 1148b57dc7c1SPaul Blakey 1149b57dc7c1SPaul Blakey range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ? 1150b57dc7c1SPaul Blakey nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) : 1151b57dc7c1SPaul Blakey range->min_proto.all; 1152b57dc7c1SPaul Blakey } 1153b57dc7c1SPaul Blakey 1154b57dc7c1SPaul Blakey return 0; 1155b57dc7c1SPaul Blakey } 1156b57dc7c1SPaul Blakey 1157b57dc7c1SPaul Blakey static void tcf_ct_set_key_val(struct nlattr **tb, 1158b57dc7c1SPaul Blakey void *val, int val_type, 1159b57dc7c1SPaul Blakey void *mask, int mask_type, 1160b57dc7c1SPaul Blakey int len) 1161b57dc7c1SPaul Blakey { 1162b57dc7c1SPaul Blakey if (!tb[val_type]) 1163b57dc7c1SPaul Blakey return; 1164b57dc7c1SPaul Blakey nla_memcpy(val, tb[val_type], len); 1165b57dc7c1SPaul Blakey 1166b57dc7c1SPaul Blakey if (!mask) 1167b57dc7c1SPaul Blakey return; 1168b57dc7c1SPaul Blakey 1169b57dc7c1SPaul Blakey if (mask_type == TCA_CT_UNSPEC || !tb[mask_type]) 1170b57dc7c1SPaul Blakey memset(mask, 0xff, len); 1171b57dc7c1SPaul Blakey else 1172b57dc7c1SPaul Blakey nla_memcpy(mask, tb[mask_type], len); 1173b57dc7c1SPaul Blakey } 1174b57dc7c1SPaul Blakey 1175b57dc7c1SPaul Blakey static int tcf_ct_fill_params(struct net *net, 1176b57dc7c1SPaul Blakey struct tcf_ct_params *p, 1177b57dc7c1SPaul Blakey struct tc_ct *parm, 1178b57dc7c1SPaul Blakey struct nlattr **tb, 1179b57dc7c1SPaul Blakey struct netlink_ext_ack *extack) 1180b57dc7c1SPaul Blakey { 1181acd0a7abSZhengchao Shao struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id); 1182b57dc7c1SPaul Blakey struct nf_conntrack_zone zone; 1183a21b06e7SXin Long int err, family, proto, len; 1184b57dc7c1SPaul Blakey struct nf_conn *tmpl; 1185a21b06e7SXin Long char *name; 1186b57dc7c1SPaul Blakey 1187b57dc7c1SPaul Blakey p->zone = NF_CT_DEFAULT_ZONE_ID; 1188b57dc7c1SPaul Blakey 1189b57dc7c1SPaul Blakey tcf_ct_set_key_val(tb, 1190b57dc7c1SPaul Blakey &p->ct_action, TCA_CT_ACTION, 1191b57dc7c1SPaul Blakey NULL, TCA_CT_UNSPEC, 1192b57dc7c1SPaul Blakey sizeof(p->ct_action)); 1193b57dc7c1SPaul Blakey 1194b57dc7c1SPaul Blakey if (p->ct_action & TCA_CT_ACT_CLEAR) 1195b57dc7c1SPaul Blakey return 0; 1196b57dc7c1SPaul Blakey 1197b57dc7c1SPaul Blakey err = tcf_ct_fill_params_nat(p, parm, tb, extack); 1198b57dc7c1SPaul Blakey if (err) 1199b57dc7c1SPaul Blakey return err; 1200b57dc7c1SPaul Blakey 1201b57dc7c1SPaul Blakey if (tb[TCA_CT_MARK]) { 1202b57dc7c1SPaul Blakey if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1203b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled."); 1204b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1205b57dc7c1SPaul Blakey } 1206b57dc7c1SPaul Blakey tcf_ct_set_key_val(tb, 1207b57dc7c1SPaul Blakey &p->mark, TCA_CT_MARK, 1208b57dc7c1SPaul Blakey &p->mark_mask, TCA_CT_MARK_MASK, 1209b57dc7c1SPaul Blakey sizeof(p->mark)); 1210b57dc7c1SPaul Blakey } 1211b57dc7c1SPaul Blakey 1212b57dc7c1SPaul Blakey if (tb[TCA_CT_LABELS]) { 1213b57dc7c1SPaul Blakey if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1214b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled."); 1215b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1216b57dc7c1SPaul Blakey } 1217b57dc7c1SPaul Blakey 1218b57dc7c1SPaul Blakey if (!tn->labels) { 1219b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length"); 1220b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1221b57dc7c1SPaul Blakey } 1222b57dc7c1SPaul Blakey tcf_ct_set_key_val(tb, 1223b57dc7c1SPaul Blakey p->labels, TCA_CT_LABELS, 1224b57dc7c1SPaul Blakey p->labels_mask, TCA_CT_LABELS_MASK, 1225b57dc7c1SPaul Blakey sizeof(p->labels)); 1226b57dc7c1SPaul Blakey } 1227b57dc7c1SPaul Blakey 1228b57dc7c1SPaul Blakey if (tb[TCA_CT_ZONE]) { 1229b57dc7c1SPaul Blakey if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1230b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled."); 1231b57dc7c1SPaul Blakey return -EOPNOTSUPP; 1232b57dc7c1SPaul Blakey } 1233b57dc7c1SPaul Blakey 1234b57dc7c1SPaul Blakey tcf_ct_set_key_val(tb, 1235b57dc7c1SPaul Blakey &p->zone, TCA_CT_ZONE, 1236b57dc7c1SPaul Blakey NULL, TCA_CT_UNSPEC, 1237b57dc7c1SPaul Blakey sizeof(p->zone)); 1238b57dc7c1SPaul Blakey } 1239b57dc7c1SPaul Blakey 1240b57dc7c1SPaul Blakey nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0); 1241b57dc7c1SPaul Blakey tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL); 1242b57dc7c1SPaul Blakey if (!tmpl) { 1243b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template"); 1244b57dc7c1SPaul Blakey return -ENOMEM; 1245b57dc7c1SPaul Blakey } 1246b57dc7c1SPaul Blakey p->tmpl = tmpl; 1247a21b06e7SXin Long if (tb[TCA_CT_HELPER_NAME]) { 1248a21b06e7SXin Long name = nla_data(tb[TCA_CT_HELPER_NAME]); 1249a21b06e7SXin Long len = nla_len(tb[TCA_CT_HELPER_NAME]); 1250a21b06e7SXin Long if (len > 16 || name[len - 1] != '\0') { 1251a21b06e7SXin Long NL_SET_ERR_MSG_MOD(extack, "Failed to parse helper name."); 1252a21b06e7SXin Long err = -EINVAL; 1253a21b06e7SXin Long goto err; 1254a21b06e7SXin Long } 1255a21b06e7SXin Long family = tb[TCA_CT_HELPER_FAMILY] ? nla_get_u8(tb[TCA_CT_HELPER_FAMILY]) : AF_INET; 1256a21b06e7SXin Long proto = tb[TCA_CT_HELPER_PROTO] ? nla_get_u8(tb[TCA_CT_HELPER_PROTO]) : IPPROTO_TCP; 1257a21b06e7SXin Long err = nf_ct_add_helper(tmpl, name, family, proto, 1258a21b06e7SXin Long p->ct_action & TCA_CT_ACT_NAT, &p->helper); 1259a21b06e7SXin Long if (err) { 1260a21b06e7SXin Long NL_SET_ERR_MSG_MOD(extack, "Failed to add helper"); 1261a21b06e7SXin Long goto err; 1262a21b06e7SXin Long } 1263a21b06e7SXin Long } 1264b57dc7c1SPaul Blakey 1265a21b06e7SXin Long __set_bit(IPS_CONFIRMED_BIT, &tmpl->status); 1266b57dc7c1SPaul Blakey return 0; 1267a21b06e7SXin Long err: 1268a21b06e7SXin Long nf_ct_put(p->tmpl); 1269a21b06e7SXin Long p->tmpl = NULL; 1270a21b06e7SXin Long return err; 1271b57dc7c1SPaul Blakey } 1272b57dc7c1SPaul Blakey 1273b57dc7c1SPaul Blakey static int tcf_ct_init(struct net *net, struct nlattr *nla, 1274b57dc7c1SPaul Blakey struct nlattr *est, struct tc_action **a, 1275abbb0d33SVlad Buslov struct tcf_proto *tp, u32 flags, 1276b57dc7c1SPaul Blakey struct netlink_ext_ack *extack) 1277b57dc7c1SPaul Blakey { 1278acd0a7abSZhengchao Shao struct tc_action_net *tn = net_generic(net, act_ct_ops.net_id); 1279695176bfSCong Wang bool bind = flags & TCA_ACT_FLAGS_BIND; 1280b57dc7c1SPaul Blakey struct tcf_ct_params *params = NULL; 1281b57dc7c1SPaul Blakey struct nlattr *tb[TCA_CT_MAX + 1]; 1282b57dc7c1SPaul Blakey struct tcf_chain *goto_ch = NULL; 1283b57dc7c1SPaul Blakey struct tc_ct *parm; 1284b57dc7c1SPaul Blakey struct tcf_ct *c; 1285b57dc7c1SPaul Blakey int err, res = 0; 12867be8ef2cSDmytro Linkin u32 index; 1287b57dc7c1SPaul Blakey 1288b57dc7c1SPaul Blakey if (!nla) { 1289b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed"); 1290b57dc7c1SPaul Blakey return -EINVAL; 1291b57dc7c1SPaul Blakey } 1292b57dc7c1SPaul Blakey 1293b57dc7c1SPaul Blakey err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack); 1294b57dc7c1SPaul Blakey if (err < 0) 1295b57dc7c1SPaul Blakey return err; 1296b57dc7c1SPaul Blakey 1297b57dc7c1SPaul Blakey if (!tb[TCA_CT_PARMS]) { 1298b57dc7c1SPaul Blakey NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters"); 1299b57dc7c1SPaul Blakey return -EINVAL; 1300b57dc7c1SPaul Blakey } 1301b57dc7c1SPaul Blakey parm = nla_data(tb[TCA_CT_PARMS]); 13027be8ef2cSDmytro Linkin index = parm->index; 13037be8ef2cSDmytro Linkin err = tcf_idr_check_alloc(tn, &index, a, bind); 1304b57dc7c1SPaul Blakey if (err < 0) 1305b57dc7c1SPaul Blakey return err; 1306b57dc7c1SPaul Blakey 1307b57dc7c1SPaul Blakey if (!err) { 1308e3822678SVlad Buslov err = tcf_idr_create_from_flags(tn, index, est, a, 1309e3822678SVlad Buslov &act_ct_ops, bind, flags); 1310b57dc7c1SPaul Blakey if (err) { 13117be8ef2cSDmytro Linkin tcf_idr_cleanup(tn, index); 1312b57dc7c1SPaul Blakey return err; 1313b57dc7c1SPaul Blakey } 1314b57dc7c1SPaul Blakey res = ACT_P_CREATED; 1315b57dc7c1SPaul Blakey } else { 1316b57dc7c1SPaul Blakey if (bind) 1317b57dc7c1SPaul Blakey return 0; 1318b57dc7c1SPaul Blakey 1319695176bfSCong Wang if (!(flags & TCA_ACT_FLAGS_REPLACE)) { 1320b57dc7c1SPaul Blakey tcf_idr_release(*a, bind); 1321b57dc7c1SPaul Blakey return -EEXIST; 1322b57dc7c1SPaul Blakey } 1323b57dc7c1SPaul Blakey } 1324b57dc7c1SPaul Blakey err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); 1325b57dc7c1SPaul Blakey if (err < 0) 1326b57dc7c1SPaul Blakey goto cleanup; 1327b57dc7c1SPaul Blakey 1328b57dc7c1SPaul Blakey c = to_ct(*a); 1329b57dc7c1SPaul Blakey 1330b57dc7c1SPaul Blakey params = kzalloc(sizeof(*params), GFP_KERNEL); 1331b57dc7c1SPaul Blakey if (unlikely(!params)) { 1332b57dc7c1SPaul Blakey err = -ENOMEM; 1333b57dc7c1SPaul Blakey goto cleanup; 1334b57dc7c1SPaul Blakey } 1335b57dc7c1SPaul Blakey 1336b57dc7c1SPaul Blakey err = tcf_ct_fill_params(net, params, parm, tb, extack); 1337b57dc7c1SPaul Blakey if (err) 1338b57dc7c1SPaul Blakey goto cleanup; 1339b57dc7c1SPaul Blakey 1340fc54d906SVlad Buslov err = tcf_ct_flow_table_get(net, params); 1341c34b961aSPaul Blakey if (err) 134219138941SXin Long goto cleanup; 1343c34b961aSPaul Blakey 1344b57dc7c1SPaul Blakey spin_lock_bh(&c->tcf_lock); 1345b57dc7c1SPaul Blakey goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); 1346445d3749SPaul E. McKenney params = rcu_replace_pointer(c->params, params, 1347445d3749SPaul E. McKenney lockdep_is_held(&c->tcf_lock)); 1348b57dc7c1SPaul Blakey spin_unlock_bh(&c->tcf_lock); 1349b57dc7c1SPaul Blakey 1350b57dc7c1SPaul Blakey if (goto_ch) 1351b57dc7c1SPaul Blakey tcf_chain_put_by_act(goto_ch); 1352b57dc7c1SPaul Blakey if (params) 135319138941SXin Long call_rcu(¶ms->rcu, tcf_ct_params_free_rcu); 1354b57dc7c1SPaul Blakey 1355b57dc7c1SPaul Blakey return res; 1356b57dc7c1SPaul Blakey 1357b57dc7c1SPaul Blakey cleanup: 1358b57dc7c1SPaul Blakey if (goto_ch) 1359b57dc7c1SPaul Blakey tcf_chain_put_by_act(goto_ch); 136019138941SXin Long if (params) 136119138941SXin Long tcf_ct_params_free(params); 1362b57dc7c1SPaul Blakey tcf_idr_release(*a, bind); 1363b57dc7c1SPaul Blakey return err; 1364b57dc7c1SPaul Blakey } 1365b57dc7c1SPaul Blakey 1366b57dc7c1SPaul Blakey static void tcf_ct_cleanup(struct tc_action *a) 1367b57dc7c1SPaul Blakey { 1368b57dc7c1SPaul Blakey struct tcf_ct_params *params; 1369b57dc7c1SPaul Blakey struct tcf_ct *c = to_ct(a); 1370b57dc7c1SPaul Blakey 1371b57dc7c1SPaul Blakey params = rcu_dereference_protected(c->params, 1); 1372b57dc7c1SPaul Blakey if (params) 137319138941SXin Long call_rcu(¶ms->rcu, tcf_ct_params_free_rcu); 1374b57dc7c1SPaul Blakey } 1375b57dc7c1SPaul Blakey 1376b57dc7c1SPaul Blakey static int tcf_ct_dump_key_val(struct sk_buff *skb, 1377b57dc7c1SPaul Blakey void *val, int val_type, 1378b57dc7c1SPaul Blakey void *mask, int mask_type, 1379b57dc7c1SPaul Blakey int len) 1380b57dc7c1SPaul Blakey { 1381b57dc7c1SPaul Blakey int err; 1382b57dc7c1SPaul Blakey 1383b57dc7c1SPaul Blakey if (mask && !memchr_inv(mask, 0, len)) 1384b57dc7c1SPaul Blakey return 0; 1385b57dc7c1SPaul Blakey 1386b57dc7c1SPaul Blakey err = nla_put(skb, val_type, len, val); 1387b57dc7c1SPaul Blakey if (err) 1388b57dc7c1SPaul Blakey return err; 1389b57dc7c1SPaul Blakey 1390b57dc7c1SPaul Blakey if (mask_type != TCA_CT_UNSPEC) { 1391b57dc7c1SPaul Blakey err = nla_put(skb, mask_type, len, mask); 1392b57dc7c1SPaul Blakey if (err) 1393b57dc7c1SPaul Blakey return err; 1394b57dc7c1SPaul Blakey } 1395b57dc7c1SPaul Blakey 1396b57dc7c1SPaul Blakey return 0; 1397b57dc7c1SPaul Blakey } 1398b57dc7c1SPaul Blakey 1399b57dc7c1SPaul Blakey static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p) 1400b57dc7c1SPaul Blakey { 1401b57dc7c1SPaul Blakey struct nf_nat_range2 *range = &p->range; 1402b57dc7c1SPaul Blakey 1403b57dc7c1SPaul Blakey if (!(p->ct_action & TCA_CT_ACT_NAT)) 1404b57dc7c1SPaul Blakey return 0; 1405b57dc7c1SPaul Blakey 1406b57dc7c1SPaul Blakey if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST))) 1407b57dc7c1SPaul Blakey return 0; 1408b57dc7c1SPaul Blakey 1409b57dc7c1SPaul Blakey if (range->flags & NF_NAT_RANGE_MAP_IPS) { 1410b57dc7c1SPaul Blakey if (p->ipv4_range) { 1411b57dc7c1SPaul Blakey if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN, 1412b57dc7c1SPaul Blakey range->min_addr.ip)) 1413b57dc7c1SPaul Blakey return -1; 1414b57dc7c1SPaul Blakey if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX, 1415b57dc7c1SPaul Blakey range->max_addr.ip)) 1416b57dc7c1SPaul Blakey return -1; 1417b57dc7c1SPaul Blakey } else { 1418b57dc7c1SPaul Blakey if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN, 1419b57dc7c1SPaul Blakey &range->min_addr.in6)) 1420b57dc7c1SPaul Blakey return -1; 1421b57dc7c1SPaul Blakey if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX, 1422b57dc7c1SPaul Blakey &range->max_addr.in6)) 1423b57dc7c1SPaul Blakey return -1; 1424b57dc7c1SPaul Blakey } 1425b57dc7c1SPaul Blakey } 1426b57dc7c1SPaul Blakey 1427b57dc7c1SPaul Blakey if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { 1428b57dc7c1SPaul Blakey if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN, 1429b57dc7c1SPaul Blakey range->min_proto.all)) 1430b57dc7c1SPaul Blakey return -1; 1431b57dc7c1SPaul Blakey if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX, 1432b57dc7c1SPaul Blakey range->max_proto.all)) 1433b57dc7c1SPaul Blakey return -1; 1434b57dc7c1SPaul Blakey } 1435b57dc7c1SPaul Blakey 1436b57dc7c1SPaul Blakey return 0; 1437b57dc7c1SPaul Blakey } 1438b57dc7c1SPaul Blakey 1439a21b06e7SXin Long static int tcf_ct_dump_helper(struct sk_buff *skb, struct nf_conntrack_helper *helper) 1440a21b06e7SXin Long { 1441a21b06e7SXin Long if (!helper) 1442a21b06e7SXin Long return 0; 1443a21b06e7SXin Long 1444a21b06e7SXin Long if (nla_put_string(skb, TCA_CT_HELPER_NAME, helper->name) || 1445a21b06e7SXin Long nla_put_u8(skb, TCA_CT_HELPER_FAMILY, helper->tuple.src.l3num) || 1446a21b06e7SXin Long nla_put_u8(skb, TCA_CT_HELPER_PROTO, helper->tuple.dst.protonum)) 1447a21b06e7SXin Long return -1; 1448a21b06e7SXin Long 1449a21b06e7SXin Long return 0; 1450a21b06e7SXin Long } 1451a21b06e7SXin Long 1452b57dc7c1SPaul Blakey static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a, 1453b57dc7c1SPaul Blakey int bind, int ref) 1454b57dc7c1SPaul Blakey { 1455b57dc7c1SPaul Blakey unsigned char *b = skb_tail_pointer(skb); 1456b57dc7c1SPaul Blakey struct tcf_ct *c = to_ct(a); 1457b57dc7c1SPaul Blakey struct tcf_ct_params *p; 1458b57dc7c1SPaul Blakey 1459b57dc7c1SPaul Blakey struct tc_ct opt = { 1460b57dc7c1SPaul Blakey .index = c->tcf_index, 1461b57dc7c1SPaul Blakey .refcnt = refcount_read(&c->tcf_refcnt) - ref, 1462b57dc7c1SPaul Blakey .bindcnt = atomic_read(&c->tcf_bindcnt) - bind, 1463b57dc7c1SPaul Blakey }; 1464b57dc7c1SPaul Blakey struct tcf_t t; 1465b57dc7c1SPaul Blakey 1466b57dc7c1SPaul Blakey spin_lock_bh(&c->tcf_lock); 1467b57dc7c1SPaul Blakey p = rcu_dereference_protected(c->params, 1468b57dc7c1SPaul Blakey lockdep_is_held(&c->tcf_lock)); 1469b57dc7c1SPaul Blakey opt.action = c->tcf_action; 1470b57dc7c1SPaul Blakey 1471b57dc7c1SPaul Blakey if (tcf_ct_dump_key_val(skb, 1472b57dc7c1SPaul Blakey &p->ct_action, TCA_CT_ACTION, 1473b57dc7c1SPaul Blakey NULL, TCA_CT_UNSPEC, 1474b57dc7c1SPaul Blakey sizeof(p->ct_action))) 1475b57dc7c1SPaul Blakey goto nla_put_failure; 1476b57dc7c1SPaul Blakey 1477b57dc7c1SPaul Blakey if (p->ct_action & TCA_CT_ACT_CLEAR) 1478b57dc7c1SPaul Blakey goto skip_dump; 1479b57dc7c1SPaul Blakey 1480b57dc7c1SPaul Blakey if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 1481b57dc7c1SPaul Blakey tcf_ct_dump_key_val(skb, 1482b57dc7c1SPaul Blakey &p->mark, TCA_CT_MARK, 1483b57dc7c1SPaul Blakey &p->mark_mask, TCA_CT_MARK_MASK, 1484b57dc7c1SPaul Blakey sizeof(p->mark))) 1485b57dc7c1SPaul Blakey goto nla_put_failure; 1486b57dc7c1SPaul Blakey 1487b57dc7c1SPaul Blakey if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 1488b57dc7c1SPaul Blakey tcf_ct_dump_key_val(skb, 1489b57dc7c1SPaul Blakey p->labels, TCA_CT_LABELS, 1490b57dc7c1SPaul Blakey p->labels_mask, TCA_CT_LABELS_MASK, 1491b57dc7c1SPaul Blakey sizeof(p->labels))) 1492b57dc7c1SPaul Blakey goto nla_put_failure; 1493b57dc7c1SPaul Blakey 1494b57dc7c1SPaul Blakey if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 1495b57dc7c1SPaul Blakey tcf_ct_dump_key_val(skb, 1496b57dc7c1SPaul Blakey &p->zone, TCA_CT_ZONE, 1497b57dc7c1SPaul Blakey NULL, TCA_CT_UNSPEC, 1498b57dc7c1SPaul Blakey sizeof(p->zone))) 1499b57dc7c1SPaul Blakey goto nla_put_failure; 1500b57dc7c1SPaul Blakey 1501b57dc7c1SPaul Blakey if (tcf_ct_dump_nat(skb, p)) 1502b57dc7c1SPaul Blakey goto nla_put_failure; 1503b57dc7c1SPaul Blakey 1504a21b06e7SXin Long if (tcf_ct_dump_helper(skb, p->helper)) 1505a21b06e7SXin Long goto nla_put_failure; 1506a21b06e7SXin Long 1507b57dc7c1SPaul Blakey skip_dump: 1508b57dc7c1SPaul Blakey if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt)) 1509b57dc7c1SPaul Blakey goto nla_put_failure; 1510b57dc7c1SPaul Blakey 1511b57dc7c1SPaul Blakey tcf_tm_dump(&t, &c->tcf_tm); 1512b57dc7c1SPaul Blakey if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD)) 1513b57dc7c1SPaul Blakey goto nla_put_failure; 1514b57dc7c1SPaul Blakey spin_unlock_bh(&c->tcf_lock); 1515b57dc7c1SPaul Blakey 1516b57dc7c1SPaul Blakey return skb->len; 1517b57dc7c1SPaul Blakey nla_put_failure: 1518b57dc7c1SPaul Blakey spin_unlock_bh(&c->tcf_lock); 1519b57dc7c1SPaul Blakey nlmsg_trim(skb, b); 1520b57dc7c1SPaul Blakey return -1; 1521b57dc7c1SPaul Blakey } 1522b57dc7c1SPaul Blakey 15234b61d3e8SPo Liu static void tcf_stats_update(struct tc_action *a, u64 bytes, u64 packets, 15244b61d3e8SPo Liu u64 drops, u64 lastuse, bool hw) 1525b57dc7c1SPaul Blakey { 1526b57dc7c1SPaul Blakey struct tcf_ct *c = to_ct(a); 1527b57dc7c1SPaul Blakey 15284b61d3e8SPo Liu tcf_action_update_stats(a, bytes, packets, drops, hw); 1529b57dc7c1SPaul Blakey c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse); 1530b57dc7c1SPaul Blakey } 1531b57dc7c1SPaul Blakey 1532c54e1d92SBaowen Zheng static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data, 1533c2ccf84eSIdo Schimmel u32 *index_inc, bool bind, 1534c2ccf84eSIdo Schimmel struct netlink_ext_ack *extack) 1535c54e1d92SBaowen Zheng { 1536c54e1d92SBaowen Zheng if (bind) { 1537c54e1d92SBaowen Zheng struct flow_action_entry *entry = entry_data; 1538c54e1d92SBaowen Zheng 1539c54e1d92SBaowen Zheng entry->id = FLOW_ACTION_CT; 1540c54e1d92SBaowen Zheng entry->ct.action = tcf_ct_action(act); 1541c54e1d92SBaowen Zheng entry->ct.zone = tcf_ct_zone(act); 1542c54e1d92SBaowen Zheng entry->ct.flow_table = tcf_ct_ft(act); 1543c54e1d92SBaowen Zheng *index_inc = 1; 1544c54e1d92SBaowen Zheng } else { 15458cbfe939SBaowen Zheng struct flow_offload_action *fl_action = entry_data; 15468cbfe939SBaowen Zheng 15478cbfe939SBaowen Zheng fl_action->id = FLOW_ACTION_CT; 1548c54e1d92SBaowen Zheng } 1549c54e1d92SBaowen Zheng 1550c54e1d92SBaowen Zheng return 0; 1551c54e1d92SBaowen Zheng } 1552c54e1d92SBaowen Zheng 1553b57dc7c1SPaul Blakey static struct tc_action_ops act_ct_ops = { 1554b57dc7c1SPaul Blakey .kind = "ct", 1555b57dc7c1SPaul Blakey .id = TCA_ID_CT, 1556b57dc7c1SPaul Blakey .owner = THIS_MODULE, 1557b57dc7c1SPaul Blakey .act = tcf_ct_act, 1558b57dc7c1SPaul Blakey .dump = tcf_ct_dump, 1559b57dc7c1SPaul Blakey .init = tcf_ct_init, 1560b57dc7c1SPaul Blakey .cleanup = tcf_ct_cleanup, 1561b57dc7c1SPaul Blakey .stats_update = tcf_stats_update, 1562c54e1d92SBaowen Zheng .offload_act_setup = tcf_ct_offload_act_setup, 1563b57dc7c1SPaul Blakey .size = sizeof(struct tcf_ct), 1564b57dc7c1SPaul Blakey }; 1565b57dc7c1SPaul Blakey 1566b57dc7c1SPaul Blakey static __net_init int ct_init_net(struct net *net) 1567b57dc7c1SPaul Blakey { 1568c593642cSPankaj Bharadiya unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8; 1569acd0a7abSZhengchao Shao struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id); 1570b57dc7c1SPaul Blakey 1571b57dc7c1SPaul Blakey if (nf_connlabels_get(net, n_bits - 1)) { 1572b57dc7c1SPaul Blakey tn->labels = false; 1573b57dc7c1SPaul Blakey pr_err("act_ct: Failed to set connlabels length"); 1574b57dc7c1SPaul Blakey } else { 1575b57dc7c1SPaul Blakey tn->labels = true; 1576b57dc7c1SPaul Blakey } 1577b57dc7c1SPaul Blakey 1578981471bdSCong Wang return tc_action_net_init(net, &tn->tn, &act_ct_ops); 1579b57dc7c1SPaul Blakey } 1580b57dc7c1SPaul Blakey 1581b57dc7c1SPaul Blakey static void __net_exit ct_exit_net(struct list_head *net_list) 1582b57dc7c1SPaul Blakey { 1583b57dc7c1SPaul Blakey struct net *net; 1584b57dc7c1SPaul Blakey 1585b57dc7c1SPaul Blakey rtnl_lock(); 1586b57dc7c1SPaul Blakey list_for_each_entry(net, net_list, exit_list) { 1587acd0a7abSZhengchao Shao struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id); 1588b57dc7c1SPaul Blakey 1589b57dc7c1SPaul Blakey if (tn->labels) 1590b57dc7c1SPaul Blakey nf_connlabels_put(net); 1591b57dc7c1SPaul Blakey } 1592b57dc7c1SPaul Blakey rtnl_unlock(); 1593b57dc7c1SPaul Blakey 1594acd0a7abSZhengchao Shao tc_action_net_exit(net_list, act_ct_ops.net_id); 1595b57dc7c1SPaul Blakey } 1596b57dc7c1SPaul Blakey 1597b57dc7c1SPaul Blakey static struct pernet_operations ct_net_ops = { 1598b57dc7c1SPaul Blakey .init = ct_init_net, 1599b57dc7c1SPaul Blakey .exit_batch = ct_exit_net, 1600acd0a7abSZhengchao Shao .id = &act_ct_ops.net_id, 1601b57dc7c1SPaul Blakey .size = sizeof(struct tc_ct_action_net), 1602b57dc7c1SPaul Blakey }; 1603b57dc7c1SPaul Blakey 1604b57dc7c1SPaul Blakey static int __init ct_init_module(void) 1605b57dc7c1SPaul Blakey { 1606c34b961aSPaul Blakey int err; 1607c34b961aSPaul Blakey 1608c34b961aSPaul Blakey act_ct_wq = alloc_ordered_workqueue("act_ct_workqueue", 0); 1609c34b961aSPaul Blakey if (!act_ct_wq) 1610c34b961aSPaul Blakey return -ENOMEM; 1611c34b961aSPaul Blakey 1612c34b961aSPaul Blakey err = tcf_ct_flow_tables_init(); 1613c34b961aSPaul Blakey if (err) 1614c34b961aSPaul Blakey goto err_tbl_init; 1615c34b961aSPaul Blakey 1616c34b961aSPaul Blakey err = tcf_register_action(&act_ct_ops, &ct_net_ops); 1617c34b961aSPaul Blakey if (err) 1618c34b961aSPaul Blakey goto err_register; 1619c34b961aSPaul Blakey 1620c129412fSwenxu static_branch_inc(&tcf_frag_xmit_count); 1621c129412fSwenxu 1622c34b961aSPaul Blakey return 0; 1623c34b961aSPaul Blakey 1624c34b961aSPaul Blakey err_register: 1625c34b961aSPaul Blakey tcf_ct_flow_tables_uninit(); 16268c5c51f5Sliujian err_tbl_init: 16278c5c51f5Sliujian destroy_workqueue(act_ct_wq); 1628c34b961aSPaul Blakey return err; 1629b57dc7c1SPaul Blakey } 1630b57dc7c1SPaul Blakey 1631b57dc7c1SPaul Blakey static void __exit ct_cleanup_module(void) 1632b57dc7c1SPaul Blakey { 1633c129412fSwenxu static_branch_dec(&tcf_frag_xmit_count); 1634b57dc7c1SPaul Blakey tcf_unregister_action(&act_ct_ops, &ct_net_ops); 1635c34b961aSPaul Blakey tcf_ct_flow_tables_uninit(); 1636c34b961aSPaul Blakey destroy_workqueue(act_ct_wq); 1637b57dc7c1SPaul Blakey } 1638b57dc7c1SPaul Blakey 1639b57dc7c1SPaul Blakey module_init(ct_init_module); 1640b57dc7c1SPaul Blakey module_exit(ct_cleanup_module); 1641b57dc7c1SPaul Blakey MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>"); 1642b57dc7c1SPaul Blakey MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>"); 1643b57dc7c1SPaul Blakey MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>"); 1644b57dc7c1SPaul Blakey MODULE_DESCRIPTION("Connection tracking action"); 1645b57dc7c1SPaul Blakey MODULE_LICENSE("GPL v2"); 1646