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b57dc7c1 PB |
1 | // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
2 | /* - | |
3 | * net/sched/act_ct.c Connection Tracking action | |
4 | * | |
5 | * Authors: Paul Blakey <paulb@mellanox.com> | |
6 | * Yossi Kuperman <yossiku@mellanox.com> | |
7 | * Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/rtnetlink.h> | |
15 | #include <linux/pkt_cls.h> | |
16 | #include <linux/ip.h> | |
17 | #include <linux/ipv6.h> | |
c34b961a | 18 | #include <linux/rhashtable.h> |
b57dc7c1 PB |
19 | #include <net/netlink.h> |
20 | #include <net/pkt_sched.h> | |
21 | #include <net/pkt_cls.h> | |
22 | #include <net/act_api.h> | |
23 | #include <net/ip.h> | |
24 | #include <net/ipv6_frag.h> | |
25 | #include <uapi/linux/tc_act/tc_ct.h> | |
26 | #include <net/tc_act/tc_ct.h> | |
27 | ||
c34b961a | 28 | #include <net/netfilter/nf_flow_table.h> |
b57dc7c1 PB |
29 | #include <net/netfilter/nf_conntrack.h> |
30 | #include <net/netfilter/nf_conntrack_core.h> | |
31 | #include <net/netfilter/nf_conntrack_zones.h> | |
32 | #include <net/netfilter/nf_conntrack_helper.h> | |
beb97d3a | 33 | #include <net/netfilter/nf_conntrack_acct.h> |
b57dc7c1 | 34 | #include <net/netfilter/ipv6/nf_defrag_ipv6.h> |
9795ded7 | 35 | #include <net/netfilter/nf_conntrack_act_ct.h> |
40d102cd | 36 | #include <uapi/linux/netfilter/nf_nat.h> |
b57dc7c1 | 37 | |
c34b961a PB |
38 | static struct workqueue_struct *act_ct_wq; |
39 | static struct rhashtable zones_ht; | |
138470a9 | 40 | static DEFINE_MUTEX(zones_mutex); |
c34b961a PB |
41 | |
42 | struct tcf_ct_flow_table { | |
43 | struct rhash_head node; /* In zones tables */ | |
44 | ||
45 | struct rcu_work rwork; | |
46 | struct nf_flowtable nf_ft; | |
138470a9 | 47 | refcount_t ref; |
c34b961a | 48 | u16 zone; |
c34b961a PB |
49 | |
50 | bool dying; | |
51 | }; | |
52 | ||
53 | static const struct rhashtable_params zones_params = { | |
54 | .head_offset = offsetof(struct tcf_ct_flow_table, node), | |
55 | .key_offset = offsetof(struct tcf_ct_flow_table, zone), | |
56 | .key_len = sizeof_field(struct tcf_ct_flow_table, zone), | |
57 | .automatic_shrinking = true, | |
58 | }; | |
59 | ||
9c26ba9b PB |
60 | static struct flow_action_entry * |
61 | tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action) | |
62 | { | |
63 | int i = flow_action->num_entries++; | |
64 | ||
65 | return &flow_action->entries[i]; | |
66 | } | |
67 | ||
68 | static void tcf_ct_add_mangle_action(struct flow_action *action, | |
69 | enum flow_action_mangle_base htype, | |
70 | u32 offset, | |
71 | u32 mask, | |
72 | u32 val) | |
73 | { | |
74 | struct flow_action_entry *entry; | |
75 | ||
76 | entry = tcf_ct_flow_table_flow_action_get_next(action); | |
77 | entry->id = FLOW_ACTION_MANGLE; | |
78 | entry->mangle.htype = htype; | |
79 | entry->mangle.mask = ~mask; | |
80 | entry->mangle.offset = offset; | |
81 | entry->mangle.val = val; | |
82 | } | |
83 | ||
84 | /* The following nat helper functions check if the inverted reverse tuple | |
85 | * (target) is different then the current dir tuple - meaning nat for ports | |
86 | * and/or ip is needed, and add the relevant mangle actions. | |
87 | */ | |
88 | static void | |
89 | tcf_ct_flow_table_add_action_nat_ipv4(const struct nf_conntrack_tuple *tuple, | |
90 | struct nf_conntrack_tuple target, | |
91 | struct flow_action *action) | |
92 | { | |
93 | if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3))) | |
94 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4, | |
95 | offsetof(struct iphdr, saddr), | |
96 | 0xFFFFFFFF, | |
97 | be32_to_cpu(target.src.u3.ip)); | |
98 | if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3))) | |
99 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4, | |
100 | offsetof(struct iphdr, daddr), | |
101 | 0xFFFFFFFF, | |
102 | be32_to_cpu(target.dst.u3.ip)); | |
103 | } | |
104 | ||
105 | static void | |
106 | tcf_ct_add_ipv6_addr_mangle_action(struct flow_action *action, | |
107 | union nf_inet_addr *addr, | |
108 | u32 offset) | |
109 | { | |
110 | int i; | |
111 | ||
112 | for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++) | |
113 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP6, | |
114 | i * sizeof(u32) + offset, | |
115 | 0xFFFFFFFF, be32_to_cpu(addr->ip6[i])); | |
116 | } | |
117 | ||
118 | static void | |
119 | tcf_ct_flow_table_add_action_nat_ipv6(const struct nf_conntrack_tuple *tuple, | |
120 | struct nf_conntrack_tuple target, | |
121 | struct flow_action *action) | |
122 | { | |
123 | if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3))) | |
124 | tcf_ct_add_ipv6_addr_mangle_action(action, &target.src.u3, | |
125 | offsetof(struct ipv6hdr, | |
126 | saddr)); | |
127 | if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3))) | |
128 | tcf_ct_add_ipv6_addr_mangle_action(action, &target.dst.u3, | |
129 | offsetof(struct ipv6hdr, | |
130 | daddr)); | |
131 | } | |
132 | ||
133 | static void | |
134 | tcf_ct_flow_table_add_action_nat_tcp(const struct nf_conntrack_tuple *tuple, | |
135 | struct nf_conntrack_tuple target, | |
136 | struct flow_action *action) | |
137 | { | |
138 | __be16 target_src = target.src.u.tcp.port; | |
139 | __be16 target_dst = target.dst.u.tcp.port; | |
140 | ||
141 | if (target_src != tuple->src.u.tcp.port) | |
142 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP, | |
143 | offsetof(struct tcphdr, source), | |
144 | 0xFFFF, be16_to_cpu(target_src)); | |
145 | if (target_dst != tuple->dst.u.tcp.port) | |
146 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP, | |
147 | offsetof(struct tcphdr, dest), | |
148 | 0xFFFF, be16_to_cpu(target_dst)); | |
149 | } | |
150 | ||
151 | static void | |
152 | tcf_ct_flow_table_add_action_nat_udp(const struct nf_conntrack_tuple *tuple, | |
153 | struct nf_conntrack_tuple target, | |
154 | struct flow_action *action) | |
155 | { | |
156 | __be16 target_src = target.src.u.udp.port; | |
157 | __be16 target_dst = target.dst.u.udp.port; | |
158 | ||
159 | if (target_src != tuple->src.u.udp.port) | |
47b5d2a1 | 160 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP, |
9c26ba9b PB |
161 | offsetof(struct udphdr, source), |
162 | 0xFFFF, be16_to_cpu(target_src)); | |
163 | if (target_dst != tuple->dst.u.udp.port) | |
47b5d2a1 | 164 | tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP, |
9c26ba9b PB |
165 | offsetof(struct udphdr, dest), |
166 | 0xFFFF, be16_to_cpu(target_dst)); | |
167 | } | |
168 | ||
169 | static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct, | |
170 | enum ip_conntrack_dir dir, | |
171 | struct flow_action *action) | |
172 | { | |
173 | struct nf_conn_labels *ct_labels; | |
174 | struct flow_action_entry *entry; | |
30b0cf90 | 175 | enum ip_conntrack_info ctinfo; |
9c26ba9b PB |
176 | u32 *act_ct_labels; |
177 | ||
178 | entry = tcf_ct_flow_table_flow_action_get_next(action); | |
179 | entry->id = FLOW_ACTION_CT_METADATA; | |
180 | #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) | |
181 | entry->ct_metadata.mark = ct->mark; | |
182 | #endif | |
30b0cf90 PB |
183 | ctinfo = dir == IP_CT_DIR_ORIGINAL ? IP_CT_ESTABLISHED : |
184 | IP_CT_ESTABLISHED_REPLY; | |
185 | /* aligns with the CT reference on the SKB nf_ct_set */ | |
186 | entry->ct_metadata.cookie = (unsigned long)ct | ctinfo; | |
941eff5a | 187 | entry->ct_metadata.orig_dir = dir == IP_CT_DIR_ORIGINAL; |
9c26ba9b PB |
188 | |
189 | act_ct_labels = entry->ct_metadata.labels; | |
190 | ct_labels = nf_ct_labels_find(ct); | |
191 | if (ct_labels) | |
192 | memcpy(act_ct_labels, ct_labels->bits, NF_CT_LABELS_MAX_SIZE); | |
193 | else | |
194 | memset(act_ct_labels, 0, NF_CT_LABELS_MAX_SIZE); | |
195 | } | |
196 | ||
197 | static int tcf_ct_flow_table_add_action_nat(struct net *net, | |
198 | struct nf_conn *ct, | |
199 | enum ip_conntrack_dir dir, | |
200 | struct flow_action *action) | |
201 | { | |
202 | const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple; | |
203 | struct nf_conntrack_tuple target; | |
204 | ||
05aa69e5 | 205 | if (!(ct->status & IPS_NAT_MASK)) |
206 | return 0; | |
207 | ||
9c26ba9b PB |
208 | nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple); |
209 | ||
210 | switch (tuple->src.l3num) { | |
211 | case NFPROTO_IPV4: | |
212 | tcf_ct_flow_table_add_action_nat_ipv4(tuple, target, | |
213 | action); | |
214 | break; | |
215 | case NFPROTO_IPV6: | |
216 | tcf_ct_flow_table_add_action_nat_ipv6(tuple, target, | |
217 | action); | |
218 | break; | |
219 | default: | |
220 | return -EOPNOTSUPP; | |
221 | } | |
222 | ||
223 | switch (nf_ct_protonum(ct)) { | |
224 | case IPPROTO_TCP: | |
225 | tcf_ct_flow_table_add_action_nat_tcp(tuple, target, action); | |
226 | break; | |
227 | case IPPROTO_UDP: | |
228 | tcf_ct_flow_table_add_action_nat_udp(tuple, target, action); | |
229 | break; | |
230 | default: | |
231 | return -EOPNOTSUPP; | |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int tcf_ct_flow_table_fill_actions(struct net *net, | |
238 | const struct flow_offload *flow, | |
239 | enum flow_offload_tuple_dir tdir, | |
240 | struct nf_flow_rule *flow_rule) | |
241 | { | |
242 | struct flow_action *action = &flow_rule->rule->action; | |
243 | int num_entries = action->num_entries; | |
244 | struct nf_conn *ct = flow->ct; | |
245 | enum ip_conntrack_dir dir; | |
246 | int i, err; | |
247 | ||
248 | switch (tdir) { | |
249 | case FLOW_OFFLOAD_DIR_ORIGINAL: | |
250 | dir = IP_CT_DIR_ORIGINAL; | |
251 | break; | |
252 | case FLOW_OFFLOAD_DIR_REPLY: | |
253 | dir = IP_CT_DIR_REPLY; | |
254 | break; | |
255 | default: | |
256 | return -EOPNOTSUPP; | |
257 | } | |
258 | ||
259 | err = tcf_ct_flow_table_add_action_nat(net, ct, dir, action); | |
260 | if (err) | |
261 | goto err_nat; | |
262 | ||
263 | tcf_ct_flow_table_add_action_meta(ct, dir, action); | |
264 | return 0; | |
265 | ||
266 | err_nat: | |
267 | /* Clear filled actions */ | |
268 | for (i = num_entries; i < action->num_entries; i++) | |
269 | memset(&action->entries[i], 0, sizeof(action->entries[i])); | |
270 | action->num_entries = num_entries; | |
271 | ||
272 | return err; | |
273 | } | |
274 | ||
c34b961a | 275 | static struct nf_flowtable_type flowtable_ct = { |
9c26ba9b | 276 | .action = tcf_ct_flow_table_fill_actions, |
c34b961a PB |
277 | .owner = THIS_MODULE, |
278 | }; | |
279 | ||
280 | static int tcf_ct_flow_table_get(struct tcf_ct_params *params) | |
281 | { | |
282 | struct tcf_ct_flow_table *ct_ft; | |
283 | int err = -ENOMEM; | |
284 | ||
138470a9 | 285 | mutex_lock(&zones_mutex); |
c34b961a | 286 | ct_ft = rhashtable_lookup_fast(&zones_ht, ¶ms->zone, zones_params); |
138470a9 ED |
287 | if (ct_ft && refcount_inc_not_zero(&ct_ft->ref)) |
288 | goto out_unlock; | |
c34b961a | 289 | |
138470a9 | 290 | ct_ft = kzalloc(sizeof(*ct_ft), GFP_KERNEL); |
c34b961a PB |
291 | if (!ct_ft) |
292 | goto err_alloc; | |
138470a9 | 293 | refcount_set(&ct_ft->ref, 1); |
c34b961a PB |
294 | |
295 | ct_ft->zone = params->zone; | |
296 | err = rhashtable_insert_fast(&zones_ht, &ct_ft->node, zones_params); | |
297 | if (err) | |
298 | goto err_insert; | |
299 | ||
300 | ct_ft->nf_ft.type = &flowtable_ct; | |
3567e233 MRL |
301 | ct_ft->nf_ft.flags |= NF_FLOWTABLE_HW_OFFLOAD | |
302 | NF_FLOWTABLE_COUNTER; | |
c34b961a PB |
303 | err = nf_flow_table_init(&ct_ft->nf_ft); |
304 | if (err) | |
305 | goto err_init; | |
306 | ||
307 | __module_get(THIS_MODULE); | |
138470a9 | 308 | out_unlock: |
c34b961a | 309 | params->ct_ft = ct_ft; |
edd5861e | 310 | params->nf_ft = &ct_ft->nf_ft; |
138470a9 | 311 | mutex_unlock(&zones_mutex); |
c34b961a PB |
312 | |
313 | return 0; | |
314 | ||
315 | err_init: | |
316 | rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params); | |
317 | err_insert: | |
318 | kfree(ct_ft); | |
319 | err_alloc: | |
138470a9 | 320 | mutex_unlock(&zones_mutex); |
c34b961a PB |
321 | return err; |
322 | } | |
323 | ||
324 | static void tcf_ct_flow_table_cleanup_work(struct work_struct *work) | |
325 | { | |
77ac5e40 | 326 | struct flow_block_cb *block_cb, *tmp_cb; |
c34b961a | 327 | struct tcf_ct_flow_table *ct_ft; |
77ac5e40 | 328 | struct flow_block *block; |
c34b961a PB |
329 | |
330 | ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table, | |
331 | rwork); | |
332 | nf_flow_table_free(&ct_ft->nf_ft); | |
77ac5e40 LP |
333 | |
334 | /* Remove any remaining callbacks before cleanup */ | |
335 | block = &ct_ft->nf_ft.flow_block; | |
336 | down_write(&ct_ft->nf_ft.flow_block_lock); | |
337 | list_for_each_entry_safe(block_cb, tmp_cb, &block->cb_list, list) { | |
338 | list_del(&block_cb->list); | |
339 | flow_block_cb_free(block_cb); | |
340 | } | |
341 | up_write(&ct_ft->nf_ft.flow_block_lock); | |
c34b961a PB |
342 | kfree(ct_ft); |
343 | ||
344 | module_put(THIS_MODULE); | |
345 | } | |
346 | ||
347 | static void tcf_ct_flow_table_put(struct tcf_ct_params *params) | |
348 | { | |
349 | struct tcf_ct_flow_table *ct_ft = params->ct_ft; | |
350 | ||
138470a9 | 351 | if (refcount_dec_and_test(¶ms->ct_ft->ref)) { |
c34b961a PB |
352 | rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params); |
353 | INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work); | |
354 | queue_rcu_work(act_ct_wq, &ct_ft->rwork); | |
355 | } | |
c34b961a PB |
356 | } |
357 | ||
db6140e5 PB |
358 | static void tcf_ct_flow_tc_ifidx(struct flow_offload *entry, |
359 | struct nf_conn_act_ct_ext *act_ct_ext, u8 dir) | |
360 | { | |
361 | entry->tuplehash[dir].tuple.xmit_type = FLOW_OFFLOAD_XMIT_TC; | |
362 | entry->tuplehash[dir].tuple.tc.iifidx = act_ct_ext->ifindex[dir]; | |
363 | } | |
364 | ||
64ff70b8 PB |
365 | static void tcf_ct_flow_table_add(struct tcf_ct_flow_table *ct_ft, |
366 | struct nf_conn *ct, | |
367 | bool tcp) | |
368 | { | |
9795ded7 | 369 | struct nf_conn_act_ct_ext *act_ct_ext; |
64ff70b8 PB |
370 | struct flow_offload *entry; |
371 | int err; | |
372 | ||
373 | if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
374 | return; | |
375 | ||
376 | entry = flow_offload_alloc(ct); | |
377 | if (!entry) { | |
378 | WARN_ON_ONCE(1); | |
379 | goto err_alloc; | |
380 | } | |
381 | ||
382 | if (tcp) { | |
383 | ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL; | |
384 | ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL; | |
385 | } | |
386 | ||
9795ded7 PB |
387 | act_ct_ext = nf_conn_act_ct_ext_find(ct); |
388 | if (act_ct_ext) { | |
db6140e5 PB |
389 | tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL); |
390 | tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY); | |
9795ded7 PB |
391 | } |
392 | ||
64ff70b8 PB |
393 | err = flow_offload_add(&ct_ft->nf_ft, entry); |
394 | if (err) | |
395 | goto err_add; | |
396 | ||
397 | return; | |
398 | ||
399 | err_add: | |
400 | flow_offload_free(entry); | |
401 | err_alloc: | |
402 | clear_bit(IPS_OFFLOAD_BIT, &ct->status); | |
403 | } | |
404 | ||
405 | static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft, | |
406 | struct nf_conn *ct, | |
407 | enum ip_conntrack_info ctinfo) | |
408 | { | |
409 | bool tcp = false; | |
410 | ||
43332cf9 CM |
411 | if ((ctinfo != IP_CT_ESTABLISHED && ctinfo != IP_CT_ESTABLISHED_REPLY) || |
412 | !test_bit(IPS_ASSURED_BIT, &ct->status)) | |
64ff70b8 PB |
413 | return; |
414 | ||
415 | switch (nf_ct_protonum(ct)) { | |
416 | case IPPROTO_TCP: | |
417 | tcp = true; | |
418 | if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED) | |
419 | return; | |
420 | break; | |
421 | case IPPROTO_UDP: | |
422 | break; | |
fcb6aa86 TM |
423 | #ifdef CONFIG_NF_CT_PROTO_GRE |
424 | case IPPROTO_GRE: { | |
425 | struct nf_conntrack_tuple *tuple; | |
426 | ||
427 | if (ct->status & IPS_NAT_MASK) | |
428 | return; | |
429 | tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; | |
430 | /* No support for GRE v1 */ | |
431 | if (tuple->src.u.gre.key || tuple->dst.u.gre.key) | |
432 | return; | |
433 | break; | |
434 | } | |
435 | #endif | |
64ff70b8 PB |
436 | default: |
437 | return; | |
438 | } | |
439 | ||
440 | if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) || | |
441 | ct->status & IPS_SEQ_ADJUST) | |
442 | return; | |
443 | ||
444 | tcf_ct_flow_table_add(ct_ft, ct, tcp); | |
445 | } | |
446 | ||
46475bb2 PB |
447 | static bool |
448 | tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb, | |
07ac9d16 PB |
449 | struct flow_offload_tuple *tuple, |
450 | struct tcphdr **tcph) | |
46475bb2 PB |
451 | { |
452 | struct flow_ports *ports; | |
453 | unsigned int thoff; | |
454 | struct iphdr *iph; | |
fcb6aa86 TM |
455 | size_t hdrsize; |
456 | u8 ipproto; | |
46475bb2 | 457 | |
4cc5fdec | 458 | if (!pskb_network_may_pull(skb, sizeof(*iph))) |
46475bb2 PB |
459 | return false; |
460 | ||
461 | iph = ip_hdr(skb); | |
462 | thoff = iph->ihl * 4; | |
463 | ||
464 | if (ip_is_fragment(iph) || | |
465 | unlikely(thoff != sizeof(struct iphdr))) | |
466 | return false; | |
467 | ||
fcb6aa86 TM |
468 | ipproto = iph->protocol; |
469 | switch (ipproto) { | |
470 | case IPPROTO_TCP: | |
471 | hdrsize = sizeof(struct tcphdr); | |
472 | break; | |
473 | case IPPROTO_UDP: | |
474 | hdrsize = sizeof(*ports); | |
475 | break; | |
476 | #ifdef CONFIG_NF_CT_PROTO_GRE | |
477 | case IPPROTO_GRE: | |
478 | hdrsize = sizeof(struct gre_base_hdr); | |
479 | break; | |
480 | #endif | |
481 | default: | |
46475bb2 | 482 | return false; |
fcb6aa86 | 483 | } |
46475bb2 PB |
484 | |
485 | if (iph->ttl <= 1) | |
486 | return false; | |
487 | ||
fcb6aa86 | 488 | if (!pskb_network_may_pull(skb, thoff + hdrsize)) |
46475bb2 PB |
489 | return false; |
490 | ||
fcb6aa86 TM |
491 | switch (ipproto) { |
492 | case IPPROTO_TCP: | |
07ac9d16 | 493 | *tcph = (void *)(skb_network_header(skb) + thoff); |
fcb6aa86 TM |
494 | fallthrough; |
495 | case IPPROTO_UDP: | |
496 | ports = (struct flow_ports *)(skb_network_header(skb) + thoff); | |
497 | tuple->src_port = ports->source; | |
498 | tuple->dst_port = ports->dest; | |
499 | break; | |
500 | case IPPROTO_GRE: { | |
501 | struct gre_base_hdr *greh; | |
502 | ||
503 | greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff); | |
504 | if ((greh->flags & GRE_VERSION) != GRE_VERSION_0) | |
505 | return false; | |
506 | break; | |
507 | } | |
508 | } | |
509 | ||
510 | iph = ip_hdr(skb); | |
46475bb2 PB |
511 | |
512 | tuple->src_v4.s_addr = iph->saddr; | |
513 | tuple->dst_v4.s_addr = iph->daddr; | |
46475bb2 | 514 | tuple->l3proto = AF_INET; |
fcb6aa86 | 515 | tuple->l4proto = ipproto; |
46475bb2 PB |
516 | |
517 | return true; | |
518 | } | |
519 | ||
520 | static bool | |
521 | tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb, | |
07ac9d16 PB |
522 | struct flow_offload_tuple *tuple, |
523 | struct tcphdr **tcph) | |
46475bb2 PB |
524 | { |
525 | struct flow_ports *ports; | |
526 | struct ipv6hdr *ip6h; | |
527 | unsigned int thoff; | |
fcb6aa86 TM |
528 | size_t hdrsize; |
529 | u8 nexthdr; | |
46475bb2 | 530 | |
4cc5fdec | 531 | if (!pskb_network_may_pull(skb, sizeof(*ip6h))) |
46475bb2 PB |
532 | return false; |
533 | ||
534 | ip6h = ipv6_hdr(skb); | |
fcb6aa86 | 535 | thoff = sizeof(*ip6h); |
46475bb2 | 536 | |
fcb6aa86 TM |
537 | nexthdr = ip6h->nexthdr; |
538 | switch (nexthdr) { | |
539 | case IPPROTO_TCP: | |
540 | hdrsize = sizeof(struct tcphdr); | |
541 | break; | |
542 | case IPPROTO_UDP: | |
543 | hdrsize = sizeof(*ports); | |
544 | break; | |
545 | #ifdef CONFIG_NF_CT_PROTO_GRE | |
546 | case IPPROTO_GRE: | |
547 | hdrsize = sizeof(struct gre_base_hdr); | |
548 | break; | |
549 | #endif | |
550 | default: | |
86360030 | 551 | return false; |
fcb6aa86 | 552 | } |
46475bb2 PB |
553 | |
554 | if (ip6h->hop_limit <= 1) | |
555 | return false; | |
556 | ||
fcb6aa86 | 557 | if (!pskb_network_may_pull(skb, thoff + hdrsize)) |
46475bb2 PB |
558 | return false; |
559 | ||
fcb6aa86 TM |
560 | switch (nexthdr) { |
561 | case IPPROTO_TCP: | |
07ac9d16 | 562 | *tcph = (void *)(skb_network_header(skb) + thoff); |
fcb6aa86 TM |
563 | fallthrough; |
564 | case IPPROTO_UDP: | |
565 | ports = (struct flow_ports *)(skb_network_header(skb) + thoff); | |
566 | tuple->src_port = ports->source; | |
567 | tuple->dst_port = ports->dest; | |
568 | break; | |
569 | case IPPROTO_GRE: { | |
570 | struct gre_base_hdr *greh; | |
571 | ||
572 | greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff); | |
573 | if ((greh->flags & GRE_VERSION) != GRE_VERSION_0) | |
574 | return false; | |
575 | break; | |
576 | } | |
577 | } | |
578 | ||
579 | ip6h = ipv6_hdr(skb); | |
46475bb2 PB |
580 | |
581 | tuple->src_v6 = ip6h->saddr; | |
582 | tuple->dst_v6 = ip6h->daddr; | |
46475bb2 | 583 | tuple->l3proto = AF_INET6; |
fcb6aa86 | 584 | tuple->l4proto = nexthdr; |
46475bb2 PB |
585 | |
586 | return true; | |
587 | } | |
588 | ||
46475bb2 PB |
589 | static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p, |
590 | struct sk_buff *skb, | |
591 | u8 family) | |
592 | { | |
593 | struct nf_flowtable *nf_ft = &p->ct_ft->nf_ft; | |
594 | struct flow_offload_tuple_rhash *tuplehash; | |
595 | struct flow_offload_tuple tuple = {}; | |
596 | enum ip_conntrack_info ctinfo; | |
07ac9d16 | 597 | struct tcphdr *tcph = NULL; |
46475bb2 PB |
598 | struct flow_offload *flow; |
599 | struct nf_conn *ct; | |
46475bb2 PB |
600 | u8 dir; |
601 | ||
46475bb2 PB |
602 | switch (family) { |
603 | case NFPROTO_IPV4: | |
07ac9d16 | 604 | if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph)) |
46475bb2 PB |
605 | return false; |
606 | break; | |
607 | case NFPROTO_IPV6: | |
07ac9d16 | 608 | if (!tcf_ct_flow_table_fill_tuple_ipv6(skb, &tuple, &tcph)) |
46475bb2 PB |
609 | return false; |
610 | break; | |
611 | default: | |
612 | return false; | |
613 | } | |
614 | ||
615 | tuplehash = flow_offload_lookup(nf_ft, &tuple); | |
616 | if (!tuplehash) | |
617 | return false; | |
618 | ||
619 | dir = tuplehash->tuple.dir; | |
620 | flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); | |
621 | ct = flow->ct; | |
622 | ||
07ac9d16 PB |
623 | if (tcph && (unlikely(tcph->fin || tcph->rst))) { |
624 | flow_offload_teardown(flow); | |
625 | return false; | |
626 | } | |
627 | ||
46475bb2 PB |
628 | ctinfo = dir == FLOW_OFFLOAD_DIR_ORIGINAL ? IP_CT_ESTABLISHED : |
629 | IP_CT_ESTABLISHED_REPLY; | |
630 | ||
8b3646d6 | 631 | flow_offload_refresh(nf_ft, flow); |
46475bb2 PB |
632 | nf_conntrack_get(&ct->ct_general); |
633 | nf_ct_set(skb, ct, ctinfo); | |
3567e233 MRL |
634 | if (nf_ft->flags & NF_FLOWTABLE_COUNTER) |
635 | nf_ct_acct_update(ct, dir, skb->len); | |
46475bb2 PB |
636 | |
637 | return true; | |
638 | } | |
639 | ||
c34b961a PB |
640 | static int tcf_ct_flow_tables_init(void) |
641 | { | |
642 | return rhashtable_init(&zones_ht, &zones_params); | |
643 | } | |
644 | ||
645 | static void tcf_ct_flow_tables_uninit(void) | |
646 | { | |
647 | rhashtable_destroy(&zones_ht); | |
648 | } | |
649 | ||
b57dc7c1 PB |
650 | static struct tc_action_ops act_ct_ops; |
651 | static unsigned int ct_net_id; | |
652 | ||
653 | struct tc_ct_action_net { | |
654 | struct tc_action_net tn; /* Must be first */ | |
655 | bool labels; | |
656 | }; | |
657 | ||
658 | /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ | |
659 | static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb, | |
660 | u16 zone_id, bool force) | |
661 | { | |
662 | enum ip_conntrack_info ctinfo; | |
663 | struct nf_conn *ct; | |
664 | ||
665 | ct = nf_ct_get(skb, &ctinfo); | |
666 | if (!ct) | |
667 | return false; | |
668 | if (!net_eq(net, read_pnet(&ct->ct_net))) | |
bcb74e13 | 669 | goto drop_ct; |
b57dc7c1 | 670 | if (nf_ct_zone(ct)->id != zone_id) |
bcb74e13 | 671 | goto drop_ct; |
b57dc7c1 PB |
672 | |
673 | /* Force conntrack entry direction. */ | |
674 | if (force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { | |
675 | if (nf_ct_is_confirmed(ct)) | |
676 | nf_ct_kill(ct); | |
677 | ||
bcb74e13 | 678 | goto drop_ct; |
b57dc7c1 PB |
679 | } |
680 | ||
681 | return true; | |
bcb74e13 MRL |
682 | |
683 | drop_ct: | |
684 | nf_ct_put(ct); | |
685 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); | |
686 | ||
687 | return false; | |
b57dc7c1 PB |
688 | } |
689 | ||
690 | /* Trim the skb to the length specified by the IP/IPv6 header, | |
691 | * removing any trailing lower-layer padding. This prepares the skb | |
692 | * for higher-layer processing that assumes skb->len excludes padding | |
693 | * (such as nf_ip_checksum). The caller needs to pull the skb to the | |
694 | * network header, and ensure ip_hdr/ipv6_hdr points to valid data. | |
695 | */ | |
696 | static int tcf_ct_skb_network_trim(struct sk_buff *skb, int family) | |
697 | { | |
698 | unsigned int len; | |
699 | int err; | |
700 | ||
701 | switch (family) { | |
702 | case NFPROTO_IPV4: | |
703 | len = ntohs(ip_hdr(skb)->tot_len); | |
704 | break; | |
705 | case NFPROTO_IPV6: | |
706 | len = sizeof(struct ipv6hdr) | |
707 | + ntohs(ipv6_hdr(skb)->payload_len); | |
708 | break; | |
709 | default: | |
710 | len = skb->len; | |
711 | } | |
712 | ||
713 | err = pskb_trim_rcsum(skb, len); | |
714 | ||
715 | return err; | |
716 | } | |
717 | ||
718 | static u8 tcf_ct_skb_nf_family(struct sk_buff *skb) | |
719 | { | |
720 | u8 family = NFPROTO_UNSPEC; | |
721 | ||
d7bf2ebe | 722 | switch (skb_protocol(skb, true)) { |
b57dc7c1 PB |
723 | case htons(ETH_P_IP): |
724 | family = NFPROTO_IPV4; | |
725 | break; | |
726 | case htons(ETH_P_IPV6): | |
727 | family = NFPROTO_IPV6; | |
728 | break; | |
729 | default: | |
730 | break; | |
731 | } | |
732 | ||
733 | return family; | |
734 | } | |
735 | ||
736 | static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag) | |
737 | { | |
738 | unsigned int len; | |
739 | ||
740 | len = skb_network_offset(skb) + sizeof(struct iphdr); | |
741 | if (unlikely(skb->len < len)) | |
742 | return -EINVAL; | |
743 | if (unlikely(!pskb_may_pull(skb, len))) | |
744 | return -ENOMEM; | |
745 | ||
746 | *frag = ip_is_fragment(ip_hdr(skb)); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag) | |
751 | { | |
752 | unsigned int flags = 0, len, payload_ofs = 0; | |
753 | unsigned short frag_off; | |
754 | int nexthdr; | |
755 | ||
756 | len = skb_network_offset(skb) + sizeof(struct ipv6hdr); | |
757 | if (unlikely(skb->len < len)) | |
758 | return -EINVAL; | |
759 | if (unlikely(!pskb_may_pull(skb, len))) | |
760 | return -ENOMEM; | |
761 | ||
762 | nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags); | |
763 | if (unlikely(nexthdr < 0)) | |
764 | return -EPROTO; | |
765 | ||
766 | *frag = flags & IP6_FH_F_FRAG; | |
767 | return 0; | |
768 | } | |
769 | ||
770 | static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb, | |
ae372cb1 | 771 | u8 family, u16 zone, bool *defrag) |
b57dc7c1 PB |
772 | { |
773 | enum ip_conntrack_info ctinfo; | |
774 | struct nf_conn *ct; | |
775 | int err = 0; | |
776 | bool frag; | |
ec624fe7 | 777 | u16 mru; |
b57dc7c1 PB |
778 | |
779 | /* Previously seen (loopback)? Ignore. */ | |
780 | ct = nf_ct_get(skb, &ctinfo); | |
781 | if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED) | |
782 | return 0; | |
783 | ||
784 | if (family == NFPROTO_IPV4) | |
785 | err = tcf_ct_ipv4_is_fragment(skb, &frag); | |
786 | else | |
787 | err = tcf_ct_ipv6_is_fragment(skb, &frag); | |
788 | if (err || !frag) | |
789 | return err; | |
790 | ||
791 | skb_get(skb); | |
ec624fe7 | 792 | mru = tc_skb_cb(skb)->mru; |
b57dc7c1 PB |
793 | |
794 | if (family == NFPROTO_IPV4) { | |
795 | enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone; | |
796 | ||
797 | memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); | |
798 | local_bh_disable(); | |
799 | err = ip_defrag(net, skb, user); | |
800 | local_bh_enable(); | |
801 | if (err && err != -EINPROGRESS) | |
eda814b9 | 802 | return err; |
ae372cb1 | 803 | |
038ebb1a | 804 | if (!err) { |
ae372cb1 | 805 | *defrag = true; |
ec624fe7 | 806 | mru = IPCB(skb)->frag_max_size; |
038ebb1a | 807 | } |
b57dc7c1 PB |
808 | } else { /* NFPROTO_IPV6 */ |
809 | #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) | |
810 | enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; | |
811 | ||
812 | memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); | |
813 | err = nf_ct_frag6_gather(net, skb, user); | |
814 | if (err && err != -EINPROGRESS) | |
815 | goto out_free; | |
ae372cb1 | 816 | |
038ebb1a | 817 | if (!err) { |
ae372cb1 | 818 | *defrag = true; |
ec624fe7 | 819 | mru = IP6CB(skb)->frag_max_size; |
038ebb1a | 820 | } |
b57dc7c1 PB |
821 | #else |
822 | err = -EOPNOTSUPP; | |
823 | goto out_free; | |
824 | #endif | |
825 | } | |
826 | ||
f77bd544 | 827 | if (err != -EINPROGRESS) |
ec624fe7 | 828 | tc_skb_cb(skb)->mru = mru; |
b57dc7c1 PB |
829 | skb_clear_hash(skb); |
830 | skb->ignore_df = 1; | |
831 | return err; | |
832 | ||
833 | out_free: | |
834 | kfree_skb(skb); | |
835 | return err; | |
836 | } | |
837 | ||
838 | static void tcf_ct_params_free(struct rcu_head *head) | |
839 | { | |
840 | struct tcf_ct_params *params = container_of(head, | |
841 | struct tcf_ct_params, rcu); | |
842 | ||
c34b961a PB |
843 | tcf_ct_flow_table_put(params); |
844 | ||
b57dc7c1 | 845 | if (params->tmpl) |
408bdcfc | 846 | nf_ct_put(params->tmpl); |
b57dc7c1 PB |
847 | kfree(params); |
848 | } | |
849 | ||
850 | #if IS_ENABLED(CONFIG_NF_NAT) | |
851 | /* Modelled after nf_nat_ipv[46]_fn(). | |
852 | * range is only used for new, uninitialized NAT state. | |
853 | * Returns either NF_ACCEPT or NF_DROP. | |
854 | */ | |
855 | static int ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct, | |
856 | enum ip_conntrack_info ctinfo, | |
857 | const struct nf_nat_range2 *range, | |
858 | enum nf_nat_manip_type maniptype) | |
859 | { | |
d7bf2ebe | 860 | __be16 proto = skb_protocol(skb, true); |
b57dc7c1 PB |
861 | int hooknum, err = NF_ACCEPT; |
862 | ||
863 | /* See HOOK2MANIP(). */ | |
864 | if (maniptype == NF_NAT_MANIP_SRC) | |
865 | hooknum = NF_INET_LOCAL_IN; /* Source NAT */ | |
866 | else | |
867 | hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */ | |
868 | ||
869 | switch (ctinfo) { | |
870 | case IP_CT_RELATED: | |
871 | case IP_CT_RELATED_REPLY: | |
d7bf2ebe | 872 | if (proto == htons(ETH_P_IP) && |
b57dc7c1 PB |
873 | ip_hdr(skb)->protocol == IPPROTO_ICMP) { |
874 | if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo, | |
875 | hooknum)) | |
876 | err = NF_DROP; | |
877 | goto out; | |
d7bf2ebe | 878 | } else if (IS_ENABLED(CONFIG_IPV6) && proto == htons(ETH_P_IPV6)) { |
b57dc7c1 PB |
879 | __be16 frag_off; |
880 | u8 nexthdr = ipv6_hdr(skb)->nexthdr; | |
881 | int hdrlen = ipv6_skip_exthdr(skb, | |
882 | sizeof(struct ipv6hdr), | |
883 | &nexthdr, &frag_off); | |
884 | ||
885 | if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) { | |
886 | if (!nf_nat_icmpv6_reply_translation(skb, ct, | |
887 | ctinfo, | |
888 | hooknum, | |
889 | hdrlen)) | |
890 | err = NF_DROP; | |
891 | goto out; | |
892 | } | |
893 | } | |
894 | /* Non-ICMP, fall thru to initialize if needed. */ | |
964201de | 895 | fallthrough; |
b57dc7c1 PB |
896 | case IP_CT_NEW: |
897 | /* Seen it before? This can happen for loopback, retrans, | |
898 | * or local packets. | |
899 | */ | |
900 | if (!nf_nat_initialized(ct, maniptype)) { | |
901 | /* Initialize according to the NAT action. */ | |
902 | err = (range && range->flags & NF_NAT_RANGE_MAP_IPS) | |
903 | /* Action is set up to establish a new | |
904 | * mapping. | |
905 | */ | |
906 | ? nf_nat_setup_info(ct, range, maniptype) | |
907 | : nf_nat_alloc_null_binding(ct, hooknum); | |
908 | if (err != NF_ACCEPT) | |
909 | goto out; | |
910 | } | |
911 | break; | |
912 | ||
913 | case IP_CT_ESTABLISHED: | |
914 | case IP_CT_ESTABLISHED_REPLY: | |
915 | break; | |
916 | ||
917 | default: | |
918 | err = NF_DROP; | |
919 | goto out; | |
920 | } | |
921 | ||
922 | err = nf_nat_packet(ct, ctinfo, hooknum, skb); | |
6f022c2d PB |
923 | if (err == NF_ACCEPT) { |
924 | if (maniptype == NF_NAT_MANIP_SRC) | |
925 | tc_skb_cb(skb)->post_ct_snat = 1; | |
926 | if (maniptype == NF_NAT_MANIP_DST) | |
927 | tc_skb_cb(skb)->post_ct_dnat = 1; | |
928 | } | |
b57dc7c1 PB |
929 | out: |
930 | return err; | |
931 | } | |
932 | #endif /* CONFIG_NF_NAT */ | |
933 | ||
934 | static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask) | |
935 | { | |
936 | #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) | |
937 | u32 new_mark; | |
938 | ||
939 | if (!mask) | |
940 | return; | |
941 | ||
942 | new_mark = mark | (ct->mark & ~(mask)); | |
943 | if (ct->mark != new_mark) { | |
944 | ct->mark = new_mark; | |
945 | if (nf_ct_is_confirmed(ct)) | |
946 | nf_conntrack_event_cache(IPCT_MARK, ct); | |
947 | } | |
948 | #endif | |
949 | } | |
950 | ||
951 | static void tcf_ct_act_set_labels(struct nf_conn *ct, | |
952 | u32 *labels, | |
953 | u32 *labels_m) | |
954 | { | |
955 | #if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) | |
c593642c | 956 | size_t labels_sz = sizeof_field(struct tcf_ct_params, labels); |
b57dc7c1 PB |
957 | |
958 | if (!memchr_inv(labels_m, 0, labels_sz)) | |
959 | return; | |
960 | ||
961 | nf_connlabels_replace(ct, labels, labels_m, 4); | |
962 | #endif | |
963 | } | |
964 | ||
965 | static int tcf_ct_act_nat(struct sk_buff *skb, | |
966 | struct nf_conn *ct, | |
967 | enum ip_conntrack_info ctinfo, | |
968 | int ct_action, | |
969 | struct nf_nat_range2 *range, | |
970 | bool commit) | |
971 | { | |
972 | #if IS_ENABLED(CONFIG_NF_NAT) | |
95219afb | 973 | int err; |
b57dc7c1 PB |
974 | enum nf_nat_manip_type maniptype; |
975 | ||
976 | if (!(ct_action & TCA_CT_ACT_NAT)) | |
977 | return NF_ACCEPT; | |
978 | ||
979 | /* Add NAT extension if not confirmed yet. */ | |
980 | if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct)) | |
981 | return NF_DROP; /* Can't NAT. */ | |
982 | ||
983 | if (ctinfo != IP_CT_NEW && (ct->status & IPS_NAT_MASK) && | |
984 | (ctinfo != IP_CT_RELATED || commit)) { | |
985 | /* NAT an established or related connection like before. */ | |
986 | if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) | |
987 | /* This is the REPLY direction for a connection | |
988 | * for which NAT was applied in the forward | |
989 | * direction. Do the reverse NAT. | |
990 | */ | |
991 | maniptype = ct->status & IPS_SRC_NAT | |
992 | ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC; | |
993 | else | |
994 | maniptype = ct->status & IPS_SRC_NAT | |
995 | ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST; | |
996 | } else if (ct_action & TCA_CT_ACT_NAT_SRC) { | |
997 | maniptype = NF_NAT_MANIP_SRC; | |
998 | } else if (ct_action & TCA_CT_ACT_NAT_DST) { | |
999 | maniptype = NF_NAT_MANIP_DST; | |
1000 | } else { | |
1001 | return NF_ACCEPT; | |
1002 | } | |
1003 | ||
95219afb | 1004 | err = ct_nat_execute(skb, ct, ctinfo, range, maniptype); |
13c62f53 MRL |
1005 | if (err == NF_ACCEPT && ct->status & IPS_DST_NAT) { |
1006 | if (ct->status & IPS_SRC_NAT) { | |
1007 | if (maniptype == NF_NAT_MANIP_SRC) | |
1008 | maniptype = NF_NAT_MANIP_DST; | |
1009 | else | |
1010 | maniptype = NF_NAT_MANIP_SRC; | |
1011 | ||
1012 | err = ct_nat_execute(skb, ct, ctinfo, range, | |
1013 | maniptype); | |
1014 | } else if (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) { | |
1015 | err = ct_nat_execute(skb, ct, ctinfo, NULL, | |
1016 | NF_NAT_MANIP_SRC); | |
1017 | } | |
95219afb AC |
1018 | } |
1019 | return err; | |
b57dc7c1 PB |
1020 | #else |
1021 | return NF_ACCEPT; | |
1022 | #endif | |
1023 | } | |
1024 | ||
1025 | static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a, | |
1026 | struct tcf_result *res) | |
1027 | { | |
1028 | struct net *net = dev_net(skb->dev); | |
1029 | bool cached, commit, clear, force; | |
1030 | enum ip_conntrack_info ctinfo; | |
1031 | struct tcf_ct *c = to_ct(a); | |
1032 | struct nf_conn *tmpl = NULL; | |
1033 | struct nf_hook_state state; | |
1034 | int nh_ofs, err, retval; | |
1035 | struct tcf_ct_params *p; | |
46475bb2 | 1036 | bool skip_add = false; |
ae372cb1 | 1037 | bool defrag = false; |
b57dc7c1 PB |
1038 | struct nf_conn *ct; |
1039 | u8 family; | |
1040 | ||
1041 | p = rcu_dereference_bh(c->params); | |
1042 | ||
1043 | retval = READ_ONCE(c->tcf_action); | |
1044 | commit = p->ct_action & TCA_CT_ACT_COMMIT; | |
1045 | clear = p->ct_action & TCA_CT_ACT_CLEAR; | |
1046 | force = p->ct_action & TCA_CT_ACT_FORCE; | |
1047 | tmpl = p->tmpl; | |
1048 | ||
8367b3ab | 1049 | tcf_lastuse_update(&c->tcf_tm); |
2dc4e9e8 | 1050 | tcf_action_update_bstats(&c->common, skb); |
8367b3ab | 1051 | |
b57dc7c1 | 1052 | if (clear) { |
ec624fe7 | 1053 | tc_skb_cb(skb)->post_ct = false; |
b57dc7c1 PB |
1054 | ct = nf_ct_get(skb, &ctinfo); |
1055 | if (ct) { | |
408bdcfc | 1056 | nf_ct_put(ct); |
b57dc7c1 PB |
1057 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
1058 | } | |
1059 | ||
8ca1b090 | 1060 | goto out_clear; |
b57dc7c1 PB |
1061 | } |
1062 | ||
1063 | family = tcf_ct_skb_nf_family(skb); | |
1064 | if (family == NFPROTO_UNSPEC) | |
1065 | goto drop; | |
1066 | ||
1067 | /* The conntrack module expects to be working at L3. | |
1068 | * We also try to pull the IPv4/6 header to linear area | |
1069 | */ | |
1070 | nh_ofs = skb_network_offset(skb); | |
1071 | skb_pull_rcsum(skb, nh_ofs); | |
ae372cb1 | 1072 | err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag); |
b57dc7c1 PB |
1073 | if (err == -EINPROGRESS) { |
1074 | retval = TC_ACT_STOLEN; | |
f77bd544 | 1075 | goto out_clear; |
b57dc7c1 PB |
1076 | } |
1077 | if (err) | |
1078 | goto drop; | |
1079 | ||
1080 | err = tcf_ct_skb_network_trim(skb, family); | |
1081 | if (err) | |
1082 | goto drop; | |
1083 | ||
1084 | /* If we are recirculating packets to match on ct fields and | |
1085 | * committing with a separate ct action, then we don't need to | |
1086 | * actually run the packet through conntrack twice unless it's for a | |
1087 | * different zone. | |
1088 | */ | |
1089 | cached = tcf_ct_skb_nfct_cached(net, skb, p->zone, force); | |
1090 | if (!cached) { | |
0cc254e5 | 1091 | if (tcf_ct_flow_table_lookup(p, skb, family)) { |
46475bb2 PB |
1092 | skip_add = true; |
1093 | goto do_nat; | |
1094 | } | |
1095 | ||
b57dc7c1 PB |
1096 | /* Associate skb with specified zone. */ |
1097 | if (tmpl) { | |
9be02dd3 | 1098 | nf_conntrack_put(skb_nfct(skb)); |
b57dc7c1 PB |
1099 | nf_conntrack_get(&tmpl->ct_general); |
1100 | nf_ct_set(skb, tmpl, IP_CT_NEW); | |
1101 | } | |
1102 | ||
1103 | state.hook = NF_INET_PRE_ROUTING; | |
1104 | state.net = net; | |
1105 | state.pf = family; | |
1106 | err = nf_conntrack_in(skb, &state); | |
1107 | if (err != NF_ACCEPT) | |
1108 | goto out_push; | |
1109 | } | |
1110 | ||
46475bb2 | 1111 | do_nat: |
b57dc7c1 PB |
1112 | ct = nf_ct_get(skb, &ctinfo); |
1113 | if (!ct) | |
1114 | goto out_push; | |
1115 | nf_ct_deliver_cached_events(ct); | |
9795ded7 | 1116 | nf_conn_act_ct_ext_fill(skb, ct, ctinfo); |
b57dc7c1 PB |
1117 | |
1118 | err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit); | |
1119 | if (err != NF_ACCEPT) | |
1120 | goto drop; | |
1121 | ||
1122 | if (commit) { | |
1123 | tcf_ct_act_set_mark(ct, p->mark, p->mark_mask); | |
1124 | tcf_ct_act_set_labels(ct, p->labels, p->labels_mask); | |
1125 | ||
9795ded7 PB |
1126 | if (!nf_ct_is_confirmed(ct)) |
1127 | nf_conn_act_ct_ext_add(ct); | |
1128 | ||
b57dc7c1 PB |
1129 | /* This will take care of sending queued events |
1130 | * even if the connection is already confirmed. | |
1131 | */ | |
8955b90c | 1132 | if (nf_conntrack_confirm(skb) != NF_ACCEPT) |
1133 | goto drop; | |
b57dc7c1 PB |
1134 | } |
1135 | ||
0cc254e5 PB |
1136 | if (!skip_add) |
1137 | tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo); | |
1138 | ||
b57dc7c1 PB |
1139 | out_push: |
1140 | skb_push_rcsum(skb, nh_ofs); | |
1141 | ||
ec624fe7 | 1142 | tc_skb_cb(skb)->post_ct = true; |
38495958 | 1143 | tc_skb_cb(skb)->zone = p->zone; |
8ca1b090 | 1144 | out_clear: |
ae372cb1 | 1145 | if (defrag) |
1146 | qdisc_skb_cb(skb)->pkt_len = skb->len; | |
b57dc7c1 PB |
1147 | return retval; |
1148 | ||
1149 | drop: | |
26b537a8 | 1150 | tcf_action_inc_drop_qstats(&c->common); |
b57dc7c1 PB |
1151 | return TC_ACT_SHOT; |
1152 | } | |
1153 | ||
1154 | static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = { | |
b57dc7c1 | 1155 | [TCA_CT_ACTION] = { .type = NLA_U16 }, |
8140860c | 1156 | [TCA_CT_PARMS] = NLA_POLICY_EXACT_LEN(sizeof(struct tc_ct)), |
b57dc7c1 PB |
1157 | [TCA_CT_ZONE] = { .type = NLA_U16 }, |
1158 | [TCA_CT_MARK] = { .type = NLA_U32 }, | |
1159 | [TCA_CT_MARK_MASK] = { .type = NLA_U32 }, | |
1160 | [TCA_CT_LABELS] = { .type = NLA_BINARY, | |
1161 | .len = 128 / BITS_PER_BYTE }, | |
1162 | [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY, | |
1163 | .len = 128 / BITS_PER_BYTE }, | |
1164 | [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 }, | |
1165 | [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 }, | |
8140860c JB |
1166 | [TCA_CT_NAT_IPV6_MIN] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)), |
1167 | [TCA_CT_NAT_IPV6_MAX] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)), | |
b57dc7c1 PB |
1168 | [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 }, |
1169 | [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 }, | |
1170 | }; | |
1171 | ||
1172 | static int tcf_ct_fill_params_nat(struct tcf_ct_params *p, | |
1173 | struct tc_ct *parm, | |
1174 | struct nlattr **tb, | |
1175 | struct netlink_ext_ack *extack) | |
1176 | { | |
1177 | struct nf_nat_range2 *range; | |
1178 | ||
1179 | if (!(p->ct_action & TCA_CT_ACT_NAT)) | |
1180 | return 0; | |
1181 | ||
1182 | if (!IS_ENABLED(CONFIG_NF_NAT)) { | |
1183 | NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel"); | |
1184 | return -EOPNOTSUPP; | |
1185 | } | |
1186 | ||
1187 | if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST))) | |
1188 | return 0; | |
1189 | ||
1190 | if ((p->ct_action & TCA_CT_ACT_NAT_SRC) && | |
1191 | (p->ct_action & TCA_CT_ACT_NAT_DST)) { | |
1192 | NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time"); | |
1193 | return -EOPNOTSUPP; | |
1194 | } | |
1195 | ||
1196 | range = &p->range; | |
1197 | if (tb[TCA_CT_NAT_IPV4_MIN]) { | |
1198 | struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX]; | |
1199 | ||
1200 | p->ipv4_range = true; | |
1201 | range->flags |= NF_NAT_RANGE_MAP_IPS; | |
1202 | range->min_addr.ip = | |
1203 | nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]); | |
1204 | ||
1205 | range->max_addr.ip = max_attr ? | |
1206 | nla_get_in_addr(max_attr) : | |
1207 | range->min_addr.ip; | |
1208 | } else if (tb[TCA_CT_NAT_IPV6_MIN]) { | |
1209 | struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX]; | |
1210 | ||
1211 | p->ipv4_range = false; | |
1212 | range->flags |= NF_NAT_RANGE_MAP_IPS; | |
1213 | range->min_addr.in6 = | |
1214 | nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]); | |
1215 | ||
1216 | range->max_addr.in6 = max_attr ? | |
1217 | nla_get_in6_addr(max_attr) : | |
1218 | range->min_addr.in6; | |
1219 | } | |
1220 | ||
1221 | if (tb[TCA_CT_NAT_PORT_MIN]) { | |
1222 | range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED; | |
1223 | range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]); | |
1224 | ||
1225 | range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ? | |
1226 | nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) : | |
1227 | range->min_proto.all; | |
1228 | } | |
1229 | ||
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static void tcf_ct_set_key_val(struct nlattr **tb, | |
1234 | void *val, int val_type, | |
1235 | void *mask, int mask_type, | |
1236 | int len) | |
1237 | { | |
1238 | if (!tb[val_type]) | |
1239 | return; | |
1240 | nla_memcpy(val, tb[val_type], len); | |
1241 | ||
1242 | if (!mask) | |
1243 | return; | |
1244 | ||
1245 | if (mask_type == TCA_CT_UNSPEC || !tb[mask_type]) | |
1246 | memset(mask, 0xff, len); | |
1247 | else | |
1248 | nla_memcpy(mask, tb[mask_type], len); | |
1249 | } | |
1250 | ||
1251 | static int tcf_ct_fill_params(struct net *net, | |
1252 | struct tcf_ct_params *p, | |
1253 | struct tc_ct *parm, | |
1254 | struct nlattr **tb, | |
1255 | struct netlink_ext_ack *extack) | |
1256 | { | |
1257 | struct tc_ct_action_net *tn = net_generic(net, ct_net_id); | |
1258 | struct nf_conntrack_zone zone; | |
1259 | struct nf_conn *tmpl; | |
1260 | int err; | |
1261 | ||
1262 | p->zone = NF_CT_DEFAULT_ZONE_ID; | |
1263 | ||
1264 | tcf_ct_set_key_val(tb, | |
1265 | &p->ct_action, TCA_CT_ACTION, | |
1266 | NULL, TCA_CT_UNSPEC, | |
1267 | sizeof(p->ct_action)); | |
1268 | ||
1269 | if (p->ct_action & TCA_CT_ACT_CLEAR) | |
1270 | return 0; | |
1271 | ||
1272 | err = tcf_ct_fill_params_nat(p, parm, tb, extack); | |
1273 | if (err) | |
1274 | return err; | |
1275 | ||
1276 | if (tb[TCA_CT_MARK]) { | |
1277 | if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { | |
1278 | NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled."); | |
1279 | return -EOPNOTSUPP; | |
1280 | } | |
1281 | tcf_ct_set_key_val(tb, | |
1282 | &p->mark, TCA_CT_MARK, | |
1283 | &p->mark_mask, TCA_CT_MARK_MASK, | |
1284 | sizeof(p->mark)); | |
1285 | } | |
1286 | ||
1287 | if (tb[TCA_CT_LABELS]) { | |
1288 | if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { | |
1289 | NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled."); | |
1290 | return -EOPNOTSUPP; | |
1291 | } | |
1292 | ||
1293 | if (!tn->labels) { | |
1294 | NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length"); | |
1295 | return -EOPNOTSUPP; | |
1296 | } | |
1297 | tcf_ct_set_key_val(tb, | |
1298 | p->labels, TCA_CT_LABELS, | |
1299 | p->labels_mask, TCA_CT_LABELS_MASK, | |
1300 | sizeof(p->labels)); | |
1301 | } | |
1302 | ||
1303 | if (tb[TCA_CT_ZONE]) { | |
1304 | if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { | |
1305 | NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled."); | |
1306 | return -EOPNOTSUPP; | |
1307 | } | |
1308 | ||
1309 | tcf_ct_set_key_val(tb, | |
1310 | &p->zone, TCA_CT_ZONE, | |
1311 | NULL, TCA_CT_UNSPEC, | |
1312 | sizeof(p->zone)); | |
1313 | } | |
1314 | ||
b57dc7c1 PB |
1315 | nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0); |
1316 | tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL); | |
1317 | if (!tmpl) { | |
1318 | NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template"); | |
1319 | return -ENOMEM; | |
1320 | } | |
1321 | __set_bit(IPS_CONFIRMED_BIT, &tmpl->status); | |
b57dc7c1 PB |
1322 | p->tmpl = tmpl; |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static int tcf_ct_init(struct net *net, struct nlattr *nla, | |
1328 | struct nlattr *est, struct tc_action **a, | |
abbb0d33 | 1329 | struct tcf_proto *tp, u32 flags, |
b57dc7c1 PB |
1330 | struct netlink_ext_ack *extack) |
1331 | { | |
1332 | struct tc_action_net *tn = net_generic(net, ct_net_id); | |
695176bf | 1333 | bool bind = flags & TCA_ACT_FLAGS_BIND; |
b57dc7c1 PB |
1334 | struct tcf_ct_params *params = NULL; |
1335 | struct nlattr *tb[TCA_CT_MAX + 1]; | |
1336 | struct tcf_chain *goto_ch = NULL; | |
1337 | struct tc_ct *parm; | |
1338 | struct tcf_ct *c; | |
1339 | int err, res = 0; | |
7be8ef2c | 1340 | u32 index; |
b57dc7c1 PB |
1341 | |
1342 | if (!nla) { | |
1343 | NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed"); | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
1347 | err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack); | |
1348 | if (err < 0) | |
1349 | return err; | |
1350 | ||
1351 | if (!tb[TCA_CT_PARMS]) { | |
1352 | NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters"); | |
1353 | return -EINVAL; | |
1354 | } | |
1355 | parm = nla_data(tb[TCA_CT_PARMS]); | |
7be8ef2c DL |
1356 | index = parm->index; |
1357 | err = tcf_idr_check_alloc(tn, &index, a, bind); | |
b57dc7c1 PB |
1358 | if (err < 0) |
1359 | return err; | |
1360 | ||
1361 | if (!err) { | |
e3822678 VB |
1362 | err = tcf_idr_create_from_flags(tn, index, est, a, |
1363 | &act_ct_ops, bind, flags); | |
b57dc7c1 | 1364 | if (err) { |
7be8ef2c | 1365 | tcf_idr_cleanup(tn, index); |
b57dc7c1 PB |
1366 | return err; |
1367 | } | |
1368 | res = ACT_P_CREATED; | |
1369 | } else { | |
1370 | if (bind) | |
1371 | return 0; | |
1372 | ||
695176bf | 1373 | if (!(flags & TCA_ACT_FLAGS_REPLACE)) { |
b57dc7c1 PB |
1374 | tcf_idr_release(*a, bind); |
1375 | return -EEXIST; | |
1376 | } | |
1377 | } | |
1378 | err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); | |
1379 | if (err < 0) | |
1380 | goto cleanup; | |
1381 | ||
1382 | c = to_ct(*a); | |
1383 | ||
1384 | params = kzalloc(sizeof(*params), GFP_KERNEL); | |
1385 | if (unlikely(!params)) { | |
1386 | err = -ENOMEM; | |
1387 | goto cleanup; | |
1388 | } | |
1389 | ||
1390 | err = tcf_ct_fill_params(net, params, parm, tb, extack); | |
1391 | if (err) | |
1392 | goto cleanup; | |
1393 | ||
c34b961a PB |
1394 | err = tcf_ct_flow_table_get(params); |
1395 | if (err) | |
1396 | goto cleanup; | |
1397 | ||
b57dc7c1 PB |
1398 | spin_lock_bh(&c->tcf_lock); |
1399 | goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); | |
445d3749 PM |
1400 | params = rcu_replace_pointer(c->params, params, |
1401 | lockdep_is_held(&c->tcf_lock)); | |
b57dc7c1 PB |
1402 | spin_unlock_bh(&c->tcf_lock); |
1403 | ||
1404 | if (goto_ch) | |
1405 | tcf_chain_put_by_act(goto_ch); | |
1406 | if (params) | |
dd2af104 | 1407 | call_rcu(¶ms->rcu, tcf_ct_params_free); |
b57dc7c1 PB |
1408 | |
1409 | return res; | |
1410 | ||
1411 | cleanup: | |
1412 | if (goto_ch) | |
1413 | tcf_chain_put_by_act(goto_ch); | |
1414 | kfree(params); | |
1415 | tcf_idr_release(*a, bind); | |
1416 | return err; | |
1417 | } | |
1418 | ||
1419 | static void tcf_ct_cleanup(struct tc_action *a) | |
1420 | { | |
1421 | struct tcf_ct_params *params; | |
1422 | struct tcf_ct *c = to_ct(a); | |
1423 | ||
1424 | params = rcu_dereference_protected(c->params, 1); | |
1425 | if (params) | |
1426 | call_rcu(¶ms->rcu, tcf_ct_params_free); | |
1427 | } | |
1428 | ||
1429 | static int tcf_ct_dump_key_val(struct sk_buff *skb, | |
1430 | void *val, int val_type, | |
1431 | void *mask, int mask_type, | |
1432 | int len) | |
1433 | { | |
1434 | int err; | |
1435 | ||
1436 | if (mask && !memchr_inv(mask, 0, len)) | |
1437 | return 0; | |
1438 | ||
1439 | err = nla_put(skb, val_type, len, val); | |
1440 | if (err) | |
1441 | return err; | |
1442 | ||
1443 | if (mask_type != TCA_CT_UNSPEC) { | |
1444 | err = nla_put(skb, mask_type, len, mask); | |
1445 | if (err) | |
1446 | return err; | |
1447 | } | |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p) | |
1453 | { | |
1454 | struct nf_nat_range2 *range = &p->range; | |
1455 | ||
1456 | if (!(p->ct_action & TCA_CT_ACT_NAT)) | |
1457 | return 0; | |
1458 | ||
1459 | if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST))) | |
1460 | return 0; | |
1461 | ||
1462 | if (range->flags & NF_NAT_RANGE_MAP_IPS) { | |
1463 | if (p->ipv4_range) { | |
1464 | if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN, | |
1465 | range->min_addr.ip)) | |
1466 | return -1; | |
1467 | if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX, | |
1468 | range->max_addr.ip)) | |
1469 | return -1; | |
1470 | } else { | |
1471 | if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN, | |
1472 | &range->min_addr.in6)) | |
1473 | return -1; | |
1474 | if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX, | |
1475 | &range->max_addr.in6)) | |
1476 | return -1; | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { | |
1481 | if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN, | |
1482 | range->min_proto.all)) | |
1483 | return -1; | |
1484 | if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX, | |
1485 | range->max_proto.all)) | |
1486 | return -1; | |
1487 | } | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a, | |
1493 | int bind, int ref) | |
1494 | { | |
1495 | unsigned char *b = skb_tail_pointer(skb); | |
1496 | struct tcf_ct *c = to_ct(a); | |
1497 | struct tcf_ct_params *p; | |
1498 | ||
1499 | struct tc_ct opt = { | |
1500 | .index = c->tcf_index, | |
1501 | .refcnt = refcount_read(&c->tcf_refcnt) - ref, | |
1502 | .bindcnt = atomic_read(&c->tcf_bindcnt) - bind, | |
1503 | }; | |
1504 | struct tcf_t t; | |
1505 | ||
1506 | spin_lock_bh(&c->tcf_lock); | |
1507 | p = rcu_dereference_protected(c->params, | |
1508 | lockdep_is_held(&c->tcf_lock)); | |
1509 | opt.action = c->tcf_action; | |
1510 | ||
1511 | if (tcf_ct_dump_key_val(skb, | |
1512 | &p->ct_action, TCA_CT_ACTION, | |
1513 | NULL, TCA_CT_UNSPEC, | |
1514 | sizeof(p->ct_action))) | |
1515 | goto nla_put_failure; | |
1516 | ||
1517 | if (p->ct_action & TCA_CT_ACT_CLEAR) | |
1518 | goto skip_dump; | |
1519 | ||
1520 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && | |
1521 | tcf_ct_dump_key_val(skb, | |
1522 | &p->mark, TCA_CT_MARK, | |
1523 | &p->mark_mask, TCA_CT_MARK_MASK, | |
1524 | sizeof(p->mark))) | |
1525 | goto nla_put_failure; | |
1526 | ||
1527 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && | |
1528 | tcf_ct_dump_key_val(skb, | |
1529 | p->labels, TCA_CT_LABELS, | |
1530 | p->labels_mask, TCA_CT_LABELS_MASK, | |
1531 | sizeof(p->labels))) | |
1532 | goto nla_put_failure; | |
1533 | ||
1534 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && | |
1535 | tcf_ct_dump_key_val(skb, | |
1536 | &p->zone, TCA_CT_ZONE, | |
1537 | NULL, TCA_CT_UNSPEC, | |
1538 | sizeof(p->zone))) | |
1539 | goto nla_put_failure; | |
1540 | ||
1541 | if (tcf_ct_dump_nat(skb, p)) | |
1542 | goto nla_put_failure; | |
1543 | ||
1544 | skip_dump: | |
1545 | if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt)) | |
1546 | goto nla_put_failure; | |
1547 | ||
1548 | tcf_tm_dump(&t, &c->tcf_tm); | |
1549 | if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD)) | |
1550 | goto nla_put_failure; | |
1551 | spin_unlock_bh(&c->tcf_lock); | |
1552 | ||
1553 | return skb->len; | |
1554 | nla_put_failure: | |
1555 | spin_unlock_bh(&c->tcf_lock); | |
1556 | nlmsg_trim(skb, b); | |
1557 | return -1; | |
1558 | } | |
1559 | ||
1560 | static int tcf_ct_walker(struct net *net, struct sk_buff *skb, | |
1561 | struct netlink_callback *cb, int type, | |
1562 | const struct tc_action_ops *ops, | |
1563 | struct netlink_ext_ack *extack) | |
1564 | { | |
1565 | struct tc_action_net *tn = net_generic(net, ct_net_id); | |
1566 | ||
1567 | return tcf_generic_walker(tn, skb, cb, type, ops, extack); | |
1568 | } | |
1569 | ||
1570 | static int tcf_ct_search(struct net *net, struct tc_action **a, u32 index) | |
1571 | { | |
1572 | struct tc_action_net *tn = net_generic(net, ct_net_id); | |
1573 | ||
1574 | return tcf_idr_search(tn, a, index); | |
1575 | } | |
1576 | ||
4b61d3e8 PL |
1577 | static void tcf_stats_update(struct tc_action *a, u64 bytes, u64 packets, |
1578 | u64 drops, u64 lastuse, bool hw) | |
b57dc7c1 PB |
1579 | { |
1580 | struct tcf_ct *c = to_ct(a); | |
1581 | ||
4b61d3e8 | 1582 | tcf_action_update_stats(a, bytes, packets, drops, hw); |
b57dc7c1 PB |
1583 | c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse); |
1584 | } | |
1585 | ||
c54e1d92 | 1586 | static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data, |
c2ccf84e IS |
1587 | u32 *index_inc, bool bind, |
1588 | struct netlink_ext_ack *extack) | |
c54e1d92 BZ |
1589 | { |
1590 | if (bind) { | |
1591 | struct flow_action_entry *entry = entry_data; | |
1592 | ||
1593 | entry->id = FLOW_ACTION_CT; | |
1594 | entry->ct.action = tcf_ct_action(act); | |
1595 | entry->ct.zone = tcf_ct_zone(act); | |
1596 | entry->ct.flow_table = tcf_ct_ft(act); | |
1597 | *index_inc = 1; | |
1598 | } else { | |
8cbfe939 BZ |
1599 | struct flow_offload_action *fl_action = entry_data; |
1600 | ||
1601 | fl_action->id = FLOW_ACTION_CT; | |
c54e1d92 BZ |
1602 | } |
1603 | ||
1604 | return 0; | |
1605 | } | |
1606 | ||
b57dc7c1 PB |
1607 | static struct tc_action_ops act_ct_ops = { |
1608 | .kind = "ct", | |
1609 | .id = TCA_ID_CT, | |
1610 | .owner = THIS_MODULE, | |
1611 | .act = tcf_ct_act, | |
1612 | .dump = tcf_ct_dump, | |
1613 | .init = tcf_ct_init, | |
1614 | .cleanup = tcf_ct_cleanup, | |
1615 | .walk = tcf_ct_walker, | |
1616 | .lookup = tcf_ct_search, | |
1617 | .stats_update = tcf_stats_update, | |
c54e1d92 | 1618 | .offload_act_setup = tcf_ct_offload_act_setup, |
b57dc7c1 PB |
1619 | .size = sizeof(struct tcf_ct), |
1620 | }; | |
1621 | ||
1622 | static __net_init int ct_init_net(struct net *net) | |
1623 | { | |
c593642c | 1624 | unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8; |
b57dc7c1 PB |
1625 | struct tc_ct_action_net *tn = net_generic(net, ct_net_id); |
1626 | ||
1627 | if (nf_connlabels_get(net, n_bits - 1)) { | |
1628 | tn->labels = false; | |
1629 | pr_err("act_ct: Failed to set connlabels length"); | |
1630 | } else { | |
1631 | tn->labels = true; | |
1632 | } | |
1633 | ||
981471bd | 1634 | return tc_action_net_init(net, &tn->tn, &act_ct_ops); |
b57dc7c1 PB |
1635 | } |
1636 | ||
1637 | static void __net_exit ct_exit_net(struct list_head *net_list) | |
1638 | { | |
1639 | struct net *net; | |
1640 | ||
1641 | rtnl_lock(); | |
1642 | list_for_each_entry(net, net_list, exit_list) { | |
1643 | struct tc_ct_action_net *tn = net_generic(net, ct_net_id); | |
1644 | ||
1645 | if (tn->labels) | |
1646 | nf_connlabels_put(net); | |
1647 | } | |
1648 | rtnl_unlock(); | |
1649 | ||
1650 | tc_action_net_exit(net_list, ct_net_id); | |
1651 | } | |
1652 | ||
1653 | static struct pernet_operations ct_net_ops = { | |
1654 | .init = ct_init_net, | |
1655 | .exit_batch = ct_exit_net, | |
1656 | .id = &ct_net_id, | |
1657 | .size = sizeof(struct tc_ct_action_net), | |
1658 | }; | |
1659 | ||
1660 | static int __init ct_init_module(void) | |
1661 | { | |
c34b961a PB |
1662 | int err; |
1663 | ||
1664 | act_ct_wq = alloc_ordered_workqueue("act_ct_workqueue", 0); | |
1665 | if (!act_ct_wq) | |
1666 | return -ENOMEM; | |
1667 | ||
1668 | err = tcf_ct_flow_tables_init(); | |
1669 | if (err) | |
1670 | goto err_tbl_init; | |
1671 | ||
1672 | err = tcf_register_action(&act_ct_ops, &ct_net_ops); | |
1673 | if (err) | |
1674 | goto err_register; | |
1675 | ||
c129412f | 1676 | static_branch_inc(&tcf_frag_xmit_count); |
1677 | ||
c34b961a PB |
1678 | return 0; |
1679 | ||
c34b961a PB |
1680 | err_register: |
1681 | tcf_ct_flow_tables_uninit(); | |
8c5c51f5 | 1682 | err_tbl_init: |
1683 | destroy_workqueue(act_ct_wq); | |
c34b961a | 1684 | return err; |
b57dc7c1 PB |
1685 | } |
1686 | ||
1687 | static void __exit ct_cleanup_module(void) | |
1688 | { | |
c129412f | 1689 | static_branch_dec(&tcf_frag_xmit_count); |
b57dc7c1 | 1690 | tcf_unregister_action(&act_ct_ops, &ct_net_ops); |
c34b961a PB |
1691 | tcf_ct_flow_tables_uninit(); |
1692 | destroy_workqueue(act_ct_wq); | |
b57dc7c1 PB |
1693 | } |
1694 | ||
1695 | module_init(ct_init_module); | |
1696 | module_exit(ct_cleanup_module); | |
1697 | MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>"); | |
1698 | MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>"); | |
1699 | MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>"); | |
1700 | MODULE_DESCRIPTION("Connection tracking action"); | |
1701 | MODULE_LICENSE("GPL v2"); |