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Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
96518518 | 2 | /* |
ef1f7df9 | 3 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> |
bd2bbdb4 FW |
4 | * Copyright (c) 2014 Intel Corporation |
5 | * Author: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> | |
96518518 | 6 | * |
96518518 PM |
7 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
8 | */ | |
9 | ||
10 | #include <linux/kernel.h> | |
96518518 PM |
11 | #include <linux/netlink.h> |
12 | #include <linux/netfilter.h> | |
13 | #include <linux/netfilter/nf_tables.h> | |
e2a093ff AR |
14 | #include <linux/in.h> |
15 | #include <linux/ip.h> | |
16 | #include <linux/ipv6.h> | |
afc5be30 | 17 | #include <linux/smp.h> |
e639f7ab | 18 | #include <linux/static_key.h> |
96518518 | 19 | #include <net/dst.h> |
c14ceb0e | 20 | #include <net/ip.h> |
96518518 PM |
21 | #include <net/sock.h> |
22 | #include <net/tcp_states.h> /* for TCP_TIME_WAIT */ | |
23 | #include <net/netfilter/nf_tables.h> | |
e639f7ab | 24 | #include <net/netfilter/nf_tables_core.h> |
30e103fe | 25 | #include <net/netfilter/nft_meta.h> |
c9626a2c | 26 | #include <net/netfilter/nf_tables_offload.h> |
96518518 | 27 | |
b4aae759 FW |
28 | #include <uapi/linux/netfilter_bridge.h> /* NF_BR_PRE_ROUTING */ |
29 | ||
63d10e12 AJ |
30 | #define NFT_META_SECS_PER_MINUTE 60 |
31 | #define NFT_META_SECS_PER_HOUR 3600 | |
32 | #define NFT_META_SECS_PER_DAY 86400 | |
33 | #define NFT_META_DAYS_PER_WEEK 7 | |
34 | ||
b07edbe1 FW |
35 | static DEFINE_PER_CPU(struct rnd_state, nft_prandom_state); |
36 | ||
db8f6f5c | 37 | static u8 nft_meta_weekday(void) |
63d10e12 | 38 | { |
db8f6f5c | 39 | time64_t secs = ktime_get_real_seconds(); |
63d10e12 AJ |
40 | unsigned int dse; |
41 | u8 wday; | |
42 | ||
43 | secs -= NFT_META_SECS_PER_MINUTE * sys_tz.tz_minuteswest; | |
6408c40c | 44 | dse = div_u64(secs, NFT_META_SECS_PER_DAY); |
63d10e12 AJ |
45 | wday = (4 + dse) % NFT_META_DAYS_PER_WEEK; |
46 | ||
47 | return wday; | |
48 | } | |
49 | ||
6408c40c | 50 | static u32 nft_meta_hour(time64_t secs) |
63d10e12 AJ |
51 | { |
52 | struct tm tm; | |
53 | ||
54 | time64_to_tm(secs, 0, &tm); | |
55 | ||
56 | return tm.tm_hour * NFT_META_SECS_PER_HOUR | |
57 | + tm.tm_min * NFT_META_SECS_PER_MINUTE | |
58 | + tm.tm_sec; | |
59 | } | |
60 | ||
db8f6f5c FW |
61 | static noinline_for_stack void |
62 | nft_meta_get_eval_time(enum nft_meta_keys key, | |
63 | u32 *dest) | |
64 | { | |
65 | switch (key) { | |
66 | case NFT_META_TIME_NS: | |
67 | nft_reg_store64(dest, ktime_get_real_ns()); | |
68 | break; | |
69 | case NFT_META_TIME_DAY: | |
70 | nft_reg_store8(dest, nft_meta_weekday()); | |
71 | break; | |
72 | case NFT_META_TIME_HOUR: | |
73 | *dest = nft_meta_hour(ktime_get_real_seconds()); | |
74 | break; | |
75 | default: | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
4a54594a FW |
80 | static noinline bool |
81 | nft_meta_get_eval_pkttype_lo(const struct nft_pktinfo *pkt, | |
82 | u32 *dest) | |
83 | { | |
84 | const struct sk_buff *skb = pkt->skb; | |
85 | ||
86 | switch (nft_pf(pkt)) { | |
87 | case NFPROTO_IPV4: | |
88 | if (ipv4_is_multicast(ip_hdr(skb)->daddr)) | |
89 | nft_reg_store8(dest, PACKET_MULTICAST); | |
90 | else | |
91 | nft_reg_store8(dest, PACKET_BROADCAST); | |
92 | break; | |
93 | case NFPROTO_IPV6: | |
94 | nft_reg_store8(dest, PACKET_MULTICAST); | |
95 | break; | |
96 | case NFPROTO_NETDEV: | |
97 | switch (skb->protocol) { | |
98 | case htons(ETH_P_IP): { | |
99 | int noff = skb_network_offset(skb); | |
100 | struct iphdr *iph, _iph; | |
101 | ||
102 | iph = skb_header_pointer(skb, noff, | |
103 | sizeof(_iph), &_iph); | |
104 | if (!iph) | |
105 | return false; | |
106 | ||
107 | if (ipv4_is_multicast(iph->daddr)) | |
108 | nft_reg_store8(dest, PACKET_MULTICAST); | |
109 | else | |
110 | nft_reg_store8(dest, PACKET_BROADCAST); | |
111 | ||
112 | break; | |
113 | } | |
114 | case htons(ETH_P_IPV6): | |
115 | nft_reg_store8(dest, PACKET_MULTICAST); | |
116 | break; | |
117 | default: | |
118 | WARN_ON_ONCE(1); | |
119 | return false; | |
120 | } | |
121 | break; | |
122 | default: | |
123 | WARN_ON_ONCE(1); | |
124 | return false; | |
125 | } | |
126 | ||
127 | return true; | |
128 | } | |
129 | ||
726b44f0 FW |
130 | static noinline bool |
131 | nft_meta_get_eval_skugid(enum nft_meta_keys key, | |
132 | u32 *dest, | |
133 | const struct nft_pktinfo *pkt) | |
134 | { | |
135 | struct sock *sk = skb_to_full_sk(pkt->skb); | |
136 | struct socket *sock; | |
137 | ||
138 | if (!sk || !sk_fullsock(sk) || !net_eq(nft_net(pkt), sock_net(sk))) | |
139 | return false; | |
140 | ||
141 | read_lock_bh(&sk->sk_callback_lock); | |
142 | sock = sk->sk_socket; | |
143 | if (!sock || !sock->file) { | |
144 | read_unlock_bh(&sk->sk_callback_lock); | |
145 | return false; | |
146 | } | |
147 | ||
148 | switch (key) { | |
149 | case NFT_META_SKUID: | |
0c92411b | 150 | *dest = from_kuid_munged(sock_net(sk)->user_ns, |
726b44f0 FW |
151 | sock->file->f_cred->fsuid); |
152 | break; | |
153 | case NFT_META_SKGID: | |
0c92411b | 154 | *dest = from_kgid_munged(sock_net(sk)->user_ns, |
726b44f0 FW |
155 | sock->file->f_cred->fsgid); |
156 | break; | |
157 | default: | |
158 | break; | |
159 | } | |
160 | ||
161 | read_unlock_bh(&sk->sk_callback_lock); | |
162 | return true; | |
163 | } | |
164 | ||
b1327fbc FW |
165 | #ifdef CONFIG_CGROUP_NET_CLASSID |
166 | static noinline bool | |
167 | nft_meta_get_eval_cgroup(u32 *dest, const struct nft_pktinfo *pkt) | |
168 | { | |
169 | struct sock *sk = skb_to_full_sk(pkt->skb); | |
170 | ||
171 | if (!sk || !sk_fullsock(sk) || !net_eq(nft_net(pkt), sock_net(sk))) | |
172 | return false; | |
173 | ||
174 | *dest = sock_cgroup_classid(&sk->sk_cgrp_data); | |
175 | return true; | |
176 | } | |
177 | #endif | |
178 | ||
a4150a1f FW |
179 | static noinline bool nft_meta_get_eval_kind(enum nft_meta_keys key, |
180 | u32 *dest, | |
181 | const struct nft_pktinfo *pkt) | |
182 | { | |
183 | const struct net_device *in = nft_in(pkt), *out = nft_out(pkt); | |
184 | ||
185 | switch (key) { | |
186 | case NFT_META_IIFKIND: | |
187 | if (!in || !in->rtnl_link_ops) | |
188 | return false; | |
189 | strncpy((char *)dest, in->rtnl_link_ops->kind, IFNAMSIZ); | |
190 | break; | |
191 | case NFT_META_OIFKIND: | |
192 | if (!out || !out->rtnl_link_ops) | |
193 | return false; | |
194 | strncpy((char *)dest, out->rtnl_link_ops->kind, IFNAMSIZ); | |
195 | break; | |
196 | default: | |
197 | return false; | |
198 | } | |
199 | ||
200 | return true; | |
201 | } | |
202 | ||
8724e819 FW |
203 | static void nft_meta_store_ifindex(u32 *dest, const struct net_device *dev) |
204 | { | |
205 | *dest = dev ? dev->ifindex : 0; | |
206 | } | |
207 | ||
208 | static void nft_meta_store_ifname(u32 *dest, const struct net_device *dev) | |
209 | { | |
210 | strncpy((char *)dest, dev ? dev->name : "", IFNAMSIZ); | |
211 | } | |
212 | ||
213 | static bool nft_meta_store_iftype(u32 *dest, const struct net_device *dev) | |
214 | { | |
215 | if (!dev) | |
216 | return false; | |
217 | ||
218 | nft_reg_store16(dest, dev->type); | |
219 | return true; | |
220 | } | |
221 | ||
222 | static bool nft_meta_store_ifgroup(u32 *dest, const struct net_device *dev) | |
223 | { | |
224 | if (!dev) | |
225 | return false; | |
226 | ||
227 | *dest = dev->group; | |
228 | return true; | |
229 | } | |
230 | ||
231 | static bool nft_meta_get_eval_ifname(enum nft_meta_keys key, u32 *dest, | |
232 | const struct nft_pktinfo *pkt) | |
233 | { | |
234 | switch (key) { | |
235 | case NFT_META_IIFNAME: | |
236 | nft_meta_store_ifname(dest, nft_in(pkt)); | |
237 | break; | |
238 | case NFT_META_OIFNAME: | |
239 | nft_meta_store_ifname(dest, nft_out(pkt)); | |
240 | break; | |
241 | case NFT_META_IIF: | |
242 | nft_meta_store_ifindex(dest, nft_in(pkt)); | |
243 | break; | |
244 | case NFT_META_OIF: | |
245 | nft_meta_store_ifindex(dest, nft_out(pkt)); | |
246 | break; | |
247 | case NFT_META_IIFTYPE: | |
248 | if (!nft_meta_store_iftype(dest, nft_in(pkt))) | |
249 | return false; | |
250 | break; | |
251 | case NFT_META_OIFTYPE: | |
252 | if (!nft_meta_store_iftype(dest, nft_out(pkt))) | |
253 | return false; | |
254 | break; | |
255 | case NFT_META_IIFGROUP: | |
78470d9d | 256 | if (!nft_meta_store_ifgroup(dest, nft_in(pkt))) |
8724e819 FW |
257 | return false; |
258 | break; | |
259 | case NFT_META_OIFGROUP: | |
260 | if (!nft_meta_store_ifgroup(dest, nft_out(pkt))) | |
261 | return false; | |
262 | break; | |
263 | default: | |
264 | return false; | |
265 | } | |
266 | ||
267 | return true; | |
268 | } | |
269 | ||
6b2faee0 FW |
270 | static noinline u32 nft_prandom_u32(void) |
271 | { | |
272 | struct rnd_state *state = this_cpu_ptr(&nft_prandom_state); | |
273 | ||
274 | return prandom_u32_state(state); | |
275 | } | |
276 | ||
01a0fc82 FW |
277 | #ifdef CONFIG_IP_ROUTE_CLASSID |
278 | static noinline bool | |
279 | nft_meta_get_eval_rtclassid(const struct sk_buff *skb, u32 *dest) | |
280 | { | |
281 | const struct dst_entry *dst = skb_dst(skb); | |
282 | ||
283 | if (!dst) | |
284 | return false; | |
285 | ||
286 | *dest = dst->tclassid; | |
287 | return true; | |
288 | } | |
289 | #endif | |
290 | ||
c14ceb0e FW |
291 | static noinline u32 nft_meta_get_eval_sdif(const struct nft_pktinfo *pkt) |
292 | { | |
293 | switch (nft_pf(pkt)) { | |
294 | case NFPROTO_IPV4: | |
295 | return inet_sdif(pkt->skb); | |
296 | case NFPROTO_IPV6: | |
297 | return inet6_sdif(pkt->skb); | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | static noinline void | |
304 | nft_meta_get_eval_sdifname(u32 *dest, const struct nft_pktinfo *pkt) | |
305 | { | |
306 | u32 sdif = nft_meta_get_eval_sdif(pkt); | |
307 | const struct net_device *dev; | |
308 | ||
309 | dev = sdif ? dev_get_by_index_rcu(nft_net(pkt), sdif) : NULL; | |
310 | nft_meta_store_ifname(dest, dev); | |
311 | } | |
312 | ||
222440b4 FW |
313 | void nft_meta_get_eval(const struct nft_expr *expr, |
314 | struct nft_regs *regs, | |
315 | const struct nft_pktinfo *pkt) | |
96518518 PM |
316 | { |
317 | const struct nft_meta *priv = nft_expr_priv(expr); | |
318 | const struct sk_buff *skb = pkt->skb; | |
49499c3e | 319 | u32 *dest = ®s->data[priv->dreg]; |
96518518 PM |
320 | |
321 | switch (priv->key) { | |
322 | case NFT_META_LEN: | |
fad136ea | 323 | *dest = skb->len; |
96518518 PM |
324 | break; |
325 | case NFT_META_PROTOCOL: | |
10596608 | 326 | nft_reg_store16(dest, (__force u16)skb->protocol); |
96518518 | 327 | break; |
124edfa9 | 328 | case NFT_META_NFPROTO: |
10596608 | 329 | nft_reg_store8(dest, nft_pf(pkt)); |
124edfa9 | 330 | break; |
4566bf27 | 331 | case NFT_META_L4PROTO: |
beac5afa PNA |
332 | if (!pkt->tprot_set) |
333 | goto err; | |
10596608 | 334 | nft_reg_store8(dest, pkt->tprot); |
4566bf27 | 335 | break; |
96518518 | 336 | case NFT_META_PRIORITY: |
fad136ea | 337 | *dest = skb->priority; |
96518518 PM |
338 | break; |
339 | case NFT_META_MARK: | |
fad136ea | 340 | *dest = skb->mark; |
96518518 PM |
341 | break; |
342 | case NFT_META_IIF: | |
96518518 | 343 | case NFT_META_OIF: |
96518518 | 344 | case NFT_META_IIFNAME: |
96518518 | 345 | case NFT_META_OIFNAME: |
96518518 | 346 | case NFT_META_IIFTYPE: |
96518518 | 347 | case NFT_META_OIFTYPE: |
8724e819 FW |
348 | case NFT_META_IIFGROUP: |
349 | case NFT_META_OIFGROUP: | |
350 | if (!nft_meta_get_eval_ifname(priv->key, dest, pkt)) | |
96518518 | 351 | goto err; |
96518518 PM |
352 | break; |
353 | case NFT_META_SKUID: | |
96518518 | 354 | case NFT_META_SKGID: |
726b44f0 | 355 | if (!nft_meta_get_eval_skugid(priv->key, dest, pkt)) |
96518518 | 356 | goto err; |
96518518 | 357 | break; |
06efbd6d | 358 | #ifdef CONFIG_IP_ROUTE_CLASSID |
01a0fc82 FW |
359 | case NFT_META_RTCLASSID: |
360 | if (!nft_meta_get_eval_rtclassid(skb, dest)) | |
96518518 | 361 | goto err; |
96518518 | 362 | break; |
96518518 PM |
363 | #endif |
364 | #ifdef CONFIG_NETWORK_SECMARK | |
365 | case NFT_META_SECMARK: | |
fad136ea | 366 | *dest = skb->secmark; |
96518518 PM |
367 | break; |
368 | #endif | |
e2a093ff AR |
369 | case NFT_META_PKTTYPE: |
370 | if (skb->pkt_type != PACKET_LOOPBACK) { | |
10596608 | 371 | nft_reg_store8(dest, skb->pkt_type); |
e2a093ff AR |
372 | break; |
373 | } | |
374 | ||
4a54594a | 375 | if (!nft_meta_get_eval_pkttype_lo(pkt, dest)) |
e2a093ff | 376 | goto err; |
e2a093ff | 377 | break; |
afc5be30 | 378 | case NFT_META_CPU: |
fad136ea | 379 | *dest = raw_smp_processor_id(); |
afc5be30 | 380 | break; |
e181a543 | 381 | #ifdef CONFIG_CGROUP_NET_CLASSID |
ce674173 | 382 | case NFT_META_CGROUP: |
b1327fbc | 383 | if (!nft_meta_get_eval_cgroup(dest, pkt)) |
c5035c77 | 384 | goto err; |
ce674173 | 385 | break; |
e181a543 | 386 | #endif |
6b2faee0 FW |
387 | case NFT_META_PRANDOM: |
388 | *dest = nft_prandom_u32(); | |
b07edbe1 | 389 | break; |
f6931f5f FW |
390 | #ifdef CONFIG_XFRM |
391 | case NFT_META_SECPATH: | |
7af8f4ca | 392 | nft_reg_store8(dest, secpath_exists(skb)); |
f6931f5f FW |
393 | break; |
394 | #endif | |
0fb4d219 | 395 | case NFT_META_IIFKIND: |
0fb4d219 | 396 | case NFT_META_OIFKIND: |
a4150a1f | 397 | if (!nft_meta_get_eval_kind(priv->key, dest, pkt)) |
0fb4d219 | 398 | goto err; |
0fb4d219 | 399 | break; |
63d10e12 | 400 | case NFT_META_TIME_NS: |
63d10e12 | 401 | case NFT_META_TIME_DAY: |
63d10e12 | 402 | case NFT_META_TIME_HOUR: |
db8f6f5c | 403 | nft_meta_get_eval_time(priv->key, dest); |
63d10e12 | 404 | break; |
c14ceb0e FW |
405 | case NFT_META_SDIF: |
406 | *dest = nft_meta_get_eval_sdif(pkt); | |
407 | break; | |
408 | case NFT_META_SDIFNAME: | |
409 | nft_meta_get_eval_sdifname(dest, pkt); | |
410 | break; | |
96518518 PM |
411 | default: |
412 | WARN_ON(1); | |
413 | goto err; | |
414 | } | |
415 | return; | |
416 | ||
417 | err: | |
a55e22e9 | 418 | regs->verdict.code = NFT_BREAK; |
96518518 | 419 | } |
30e103fe | 420 | EXPORT_SYMBOL_GPL(nft_meta_get_eval); |
96518518 | 421 | |
30e103fe | 422 | void nft_meta_set_eval(const struct nft_expr *expr, |
423 | struct nft_regs *regs, | |
424 | const struct nft_pktinfo *pkt) | |
e035b77a ABG |
425 | { |
426 | const struct nft_meta *meta = nft_expr_priv(expr); | |
427 | struct sk_buff *skb = pkt->skb; | |
10596608 LZ |
428 | u32 *sreg = ®s->data[meta->sreg]; |
429 | u32 value = *sreg; | |
97a0549b | 430 | u8 value8; |
e035b77a ABG |
431 | |
432 | switch (meta->key) { | |
433 | case NFT_META_MARK: | |
434 | skb->mark = value; | |
435 | break; | |
436 | case NFT_META_PRIORITY: | |
437 | skb->priority = value; | |
438 | break; | |
b4aae759 | 439 | case NFT_META_PKTTYPE: |
97a0549b | 440 | value8 = nft_reg_load8(sreg); |
10596608 | 441 | |
97a0549b TY |
442 | if (skb->pkt_type != value8 && |
443 | skb_pkt_type_ok(value8) && | |
10596608 | 444 | skb_pkt_type_ok(skb->pkt_type)) |
97a0549b | 445 | skb->pkt_type = value8; |
b4aae759 | 446 | break; |
e035b77a | 447 | case NFT_META_NFTRACE: |
97a0549b TY |
448 | value8 = nft_reg_load8(sreg); |
449 | ||
450 | skb->nf_trace = !!value8; | |
e035b77a | 451 | break; |
b473a1f5 CG |
452 | #ifdef CONFIG_NETWORK_SECMARK |
453 | case NFT_META_SECMARK: | |
454 | skb->secmark = value; | |
455 | break; | |
456 | #endif | |
e035b77a ABG |
457 | default: |
458 | WARN_ON(1); | |
459 | } | |
460 | } | |
30e103fe | 461 | EXPORT_SYMBOL_GPL(nft_meta_set_eval); |
e035b77a | 462 | |
30e103fe | 463 | const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { |
96518518 PM |
464 | [NFTA_META_DREG] = { .type = NLA_U32 }, |
465 | [NFTA_META_KEY] = { .type = NLA_U32 }, | |
e035b77a | 466 | [NFTA_META_SREG] = { .type = NLA_U32 }, |
96518518 | 467 | }; |
30e103fe | 468 | EXPORT_SYMBOL_GPL(nft_meta_policy); |
96518518 | 469 | |
30e103fe | 470 | int nft_meta_get_init(const struct nft_ctx *ctx, |
471 | const struct nft_expr *expr, | |
472 | const struct nlattr * const tb[]) | |
96518518 | 473 | { |
d2caa696 | 474 | struct nft_meta *priv = nft_expr_priv(expr); |
45d9bcda | 475 | unsigned int len; |
96518518 | 476 | |
d2caa696 PM |
477 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
478 | switch (priv->key) { | |
96518518 | 479 | case NFT_META_PROTOCOL: |
45d9bcda PM |
480 | case NFT_META_IIFTYPE: |
481 | case NFT_META_OIFTYPE: | |
482 | len = sizeof(u16); | |
483 | break; | |
124edfa9 | 484 | case NFT_META_NFPROTO: |
4566bf27 | 485 | case NFT_META_L4PROTO: |
45d9bcda | 486 | case NFT_META_LEN: |
96518518 PM |
487 | case NFT_META_PRIORITY: |
488 | case NFT_META_MARK: | |
489 | case NFT_META_IIF: | |
490 | case NFT_META_OIF: | |
c14ceb0e | 491 | case NFT_META_SDIF: |
96518518 PM |
492 | case NFT_META_SKUID: |
493 | case NFT_META_SKGID: | |
06efbd6d | 494 | #ifdef CONFIG_IP_ROUTE_CLASSID |
96518518 PM |
495 | case NFT_META_RTCLASSID: |
496 | #endif | |
497 | #ifdef CONFIG_NETWORK_SECMARK | |
498 | case NFT_META_SECMARK: | |
499 | #endif | |
e2a093ff | 500 | case NFT_META_PKTTYPE: |
afc5be30 | 501 | case NFT_META_CPU: |
3045d760 AR |
502 | case NFT_META_IIFGROUP: |
503 | case NFT_META_OIFGROUP: | |
e181a543 | 504 | #ifdef CONFIG_CGROUP_NET_CLASSID |
ce674173 | 505 | case NFT_META_CGROUP: |
e181a543 | 506 | #endif |
45d9bcda PM |
507 | len = sizeof(u32); |
508 | break; | |
509 | case NFT_META_IIFNAME: | |
510 | case NFT_META_OIFNAME: | |
0fb4d219 | 511 | case NFT_META_IIFKIND: |
512 | case NFT_META_OIFKIND: | |
c14ceb0e | 513 | case NFT_META_SDIFNAME: |
45d9bcda | 514 | len = IFNAMSIZ; |
d2caa696 | 515 | break; |
b07edbe1 FW |
516 | case NFT_META_PRANDOM: |
517 | prandom_init_once(&nft_prandom_state); | |
518 | len = sizeof(u32); | |
519 | break; | |
f6931f5f FW |
520 | #ifdef CONFIG_XFRM |
521 | case NFT_META_SECPATH: | |
522 | len = sizeof(u8); | |
523 | break; | |
524 | #endif | |
63d10e12 AJ |
525 | case NFT_META_TIME_NS: |
526 | len = sizeof(u64); | |
527 | break; | |
528 | case NFT_META_TIME_DAY: | |
529 | len = sizeof(u8); | |
530 | break; | |
531 | case NFT_META_TIME_HOUR: | |
532 | len = sizeof(u32); | |
533 | break; | |
96518518 PM |
534 | default: |
535 | return -EOPNOTSUPP; | |
536 | } | |
537 | ||
b1c96ed3 | 538 | priv->dreg = nft_parse_register(tb[NFTA_META_DREG]); |
27e6d201 PM |
539 | return nft_validate_register_store(ctx, priv->dreg, NULL, |
540 | NFT_DATA_VALUE, len); | |
e035b77a | 541 | } |
30e103fe | 542 | EXPORT_SYMBOL_GPL(nft_meta_get_init); |
e035b77a | 543 | |
c14ceb0e | 544 | static int nft_meta_get_validate_sdif(const struct nft_ctx *ctx) |
f6931f5f | 545 | { |
f6931f5f FW |
546 | unsigned int hooks; |
547 | ||
c14ceb0e FW |
548 | switch (ctx->family) { |
549 | case NFPROTO_IPV4: | |
550 | case NFPROTO_IPV6: | |
551 | case NFPROTO_INET: | |
552 | hooks = (1 << NF_INET_LOCAL_IN) | | |
553 | (1 << NF_INET_FORWARD); | |
554 | break; | |
555 | default: | |
556 | return -EOPNOTSUPP; | |
557 | } | |
558 | ||
559 | return nft_chain_validate_hooks(ctx->chain, hooks); | |
560 | } | |
561 | ||
562 | static int nft_meta_get_validate_xfrm(const struct nft_ctx *ctx) | |
563 | { | |
564 | #ifdef CONFIG_XFRM | |
565 | unsigned int hooks; | |
f6931f5f | 566 | |
36596dad | 567 | switch (ctx->family) { |
f6931f5f FW |
568 | case NFPROTO_NETDEV: |
569 | hooks = 1 << NF_NETDEV_INGRESS; | |
570 | break; | |
571 | case NFPROTO_IPV4: | |
572 | case NFPROTO_IPV6: | |
573 | case NFPROTO_INET: | |
574 | hooks = (1 << NF_INET_PRE_ROUTING) | | |
575 | (1 << NF_INET_LOCAL_IN) | | |
576 | (1 << NF_INET_FORWARD); | |
577 | break; | |
578 | default: | |
579 | return -EOPNOTSUPP; | |
580 | } | |
581 | ||
582 | return nft_chain_validate_hooks(ctx->chain, hooks); | |
583 | #else | |
584 | return 0; | |
585 | #endif | |
586 | } | |
587 | ||
c14ceb0e FW |
588 | static int nft_meta_get_validate(const struct nft_ctx *ctx, |
589 | const struct nft_expr *expr, | |
590 | const struct nft_data **data) | |
591 | { | |
592 | const struct nft_meta *priv = nft_expr_priv(expr); | |
593 | ||
594 | switch (priv->key) { | |
595 | case NFT_META_SECPATH: | |
596 | return nft_meta_get_validate_xfrm(ctx); | |
597 | case NFT_META_SDIF: | |
598 | case NFT_META_SDIFNAME: | |
599 | return nft_meta_get_validate_sdif(ctx); | |
600 | default: | |
601 | break; | |
602 | } | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
30e103fe | 607 | int nft_meta_set_validate(const struct nft_ctx *ctx, |
608 | const struct nft_expr *expr, | |
609 | const struct nft_data **data) | |
b4aae759 | 610 | { |
960fa72f | 611 | struct nft_meta *priv = nft_expr_priv(expr); |
b4aae759 FW |
612 | unsigned int hooks; |
613 | ||
960fa72f LZ |
614 | if (priv->key != NFT_META_PKTTYPE) |
615 | return 0; | |
616 | ||
36596dad | 617 | switch (ctx->family) { |
b4aae759 FW |
618 | case NFPROTO_BRIDGE: |
619 | hooks = 1 << NF_BR_PRE_ROUTING; | |
620 | break; | |
621 | case NFPROTO_NETDEV: | |
622 | hooks = 1 << NF_NETDEV_INGRESS; | |
623 | break; | |
96d9f2a7 LZ |
624 | case NFPROTO_IPV4: |
625 | case NFPROTO_IPV6: | |
626 | case NFPROTO_INET: | |
627 | hooks = 1 << NF_INET_PRE_ROUTING; | |
628 | break; | |
b4aae759 FW |
629 | default: |
630 | return -EOPNOTSUPP; | |
631 | } | |
632 | ||
633 | return nft_chain_validate_hooks(ctx->chain, hooks); | |
634 | } | |
30e103fe | 635 | EXPORT_SYMBOL_GPL(nft_meta_set_validate); |
b4aae759 | 636 | |
30e103fe | 637 | int nft_meta_set_init(const struct nft_ctx *ctx, |
638 | const struct nft_expr *expr, | |
639 | const struct nlattr * const tb[]) | |
e035b77a ABG |
640 | { |
641 | struct nft_meta *priv = nft_expr_priv(expr); | |
d07db988 | 642 | unsigned int len; |
e035b77a ABG |
643 | int err; |
644 | ||
645 | priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); | |
d2caa696 PM |
646 | switch (priv->key) { |
647 | case NFT_META_MARK: | |
648 | case NFT_META_PRIORITY: | |
b473a1f5 CG |
649 | #ifdef CONFIG_NETWORK_SECMARK |
650 | case NFT_META_SECMARK: | |
651 | #endif | |
d07db988 PM |
652 | len = sizeof(u32); |
653 | break; | |
d2caa696 | 654 | case NFT_META_NFTRACE: |
d07db988 | 655 | len = sizeof(u8); |
d2caa696 | 656 | break; |
b4aae759 | 657 | case NFT_META_PKTTYPE: |
b4aae759 FW |
658 | len = sizeof(u8); |
659 | break; | |
d2caa696 PM |
660 | default: |
661 | return -EOPNOTSUPP; | |
e035b77a ABG |
662 | } |
663 | ||
b1c96ed3 | 664 | priv->sreg = nft_parse_register(tb[NFTA_META_SREG]); |
d07db988 | 665 | err = nft_validate_register_load(priv->sreg, len); |
b38895c5 PNA |
666 | if (err < 0) |
667 | return err; | |
e035b77a | 668 | |
e639f7ab FW |
669 | if (priv->key == NFT_META_NFTRACE) |
670 | static_branch_inc(&nft_trace_enabled); | |
671 | ||
e035b77a | 672 | return 0; |
96518518 | 673 | } |
30e103fe | 674 | EXPORT_SYMBOL_GPL(nft_meta_set_init); |
96518518 | 675 | |
30e103fe | 676 | int nft_meta_get_dump(struct sk_buff *skb, |
677 | const struct nft_expr *expr) | |
96518518 PM |
678 | { |
679 | const struct nft_meta *priv = nft_expr_priv(expr); | |
680 | ||
e035b77a ABG |
681 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
682 | goto nla_put_failure; | |
b1c96ed3 | 683 | if (nft_dump_register(skb, NFTA_META_DREG, priv->dreg)) |
96518518 | 684 | goto nla_put_failure; |
e035b77a ABG |
685 | return 0; |
686 | ||
687 | nla_put_failure: | |
688 | return -1; | |
689 | } | |
30e103fe | 690 | EXPORT_SYMBOL_GPL(nft_meta_get_dump); |
e035b77a | 691 | |
30e103fe | 692 | int nft_meta_set_dump(struct sk_buff *skb, const struct nft_expr *expr) |
e035b77a ABG |
693 | { |
694 | const struct nft_meta *priv = nft_expr_priv(expr); | |
695 | ||
96518518 PM |
696 | if (nla_put_be32(skb, NFTA_META_KEY, htonl(priv->key))) |
697 | goto nla_put_failure; | |
b1c96ed3 | 698 | if (nft_dump_register(skb, NFTA_META_SREG, priv->sreg)) |
e035b77a ABG |
699 | goto nla_put_failure; |
700 | ||
96518518 PM |
701 | return 0; |
702 | ||
703 | nla_put_failure: | |
704 | return -1; | |
705 | } | |
30e103fe | 706 | EXPORT_SYMBOL_GPL(nft_meta_set_dump); |
96518518 | 707 | |
30e103fe | 708 | void nft_meta_set_destroy(const struct nft_ctx *ctx, |
709 | const struct nft_expr *expr) | |
e639f7ab FW |
710 | { |
711 | const struct nft_meta *priv = nft_expr_priv(expr); | |
712 | ||
713 | if (priv->key == NFT_META_NFTRACE) | |
714 | static_branch_dec(&nft_trace_enabled); | |
715 | } | |
30e103fe | 716 | EXPORT_SYMBOL_GPL(nft_meta_set_destroy); |
e639f7ab | 717 | |
c9626a2c PNA |
718 | static int nft_meta_get_offload(struct nft_offload_ctx *ctx, |
719 | struct nft_flow_rule *flow, | |
720 | const struct nft_expr *expr) | |
721 | { | |
722 | const struct nft_meta *priv = nft_expr_priv(expr); | |
723 | struct nft_offload_reg *reg = &ctx->regs[priv->dreg]; | |
724 | ||
725 | switch (priv->key) { | |
726 | case NFT_META_PROTOCOL: | |
727 | NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_BASIC, basic, n_proto, | |
728 | sizeof(__u16), reg); | |
729 | nft_offload_set_dependency(ctx, NFT_OFFLOAD_DEP_NETWORK); | |
730 | break; | |
731 | case NFT_META_L4PROTO: | |
732 | NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_BASIC, basic, ip_proto, | |
733 | sizeof(__u8), reg); | |
734 | nft_offload_set_dependency(ctx, NFT_OFFLOAD_DEP_TRANSPORT); | |
735 | break; | |
25da5eb3 PNA |
736 | case NFT_META_IIF: |
737 | NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_META, meta, | |
738 | ingress_ifindex, sizeof(__u32), reg); | |
739 | break; | |
8819efc9 PNA |
740 | case NFT_META_IIFTYPE: |
741 | NFT_OFFLOAD_MATCH(FLOW_DISSECTOR_KEY_META, meta, | |
742 | ingress_iftype, sizeof(__u16), reg); | |
743 | break; | |
c9626a2c PNA |
744 | default: |
745 | return -EOPNOTSUPP; | |
746 | } | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
e035b77a | 751 | static const struct nft_expr_ops nft_meta_get_ops = { |
ef1f7df9 | 752 | .type = &nft_meta_type, |
96518518 | 753 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
e035b77a | 754 | .eval = nft_meta_get_eval, |
d2caa696 | 755 | .init = nft_meta_get_init, |
e035b77a | 756 | .dump = nft_meta_get_dump, |
f6931f5f | 757 | .validate = nft_meta_get_validate, |
c9626a2c | 758 | .offload = nft_meta_get_offload, |
ef1f7df9 PM |
759 | }; |
760 | ||
e035b77a ABG |
761 | static const struct nft_expr_ops nft_meta_set_ops = { |
762 | .type = &nft_meta_type, | |
763 | .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), | |
764 | .eval = nft_meta_set_eval, | |
d2caa696 | 765 | .init = nft_meta_set_init, |
e639f7ab | 766 | .destroy = nft_meta_set_destroy, |
e035b77a | 767 | .dump = nft_meta_set_dump, |
960fa72f | 768 | .validate = nft_meta_set_validate, |
e035b77a ABG |
769 | }; |
770 | ||
771 | static const struct nft_expr_ops * | |
772 | nft_meta_select_ops(const struct nft_ctx *ctx, | |
773 | const struct nlattr * const tb[]) | |
774 | { | |
775 | if (tb[NFTA_META_KEY] == NULL) | |
776 | return ERR_PTR(-EINVAL); | |
777 | ||
778 | if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG]) | |
779 | return ERR_PTR(-EINVAL); | |
780 | ||
dfee0e99 | 781 | #if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE) && IS_MODULE(CONFIG_NFT_BRIDGE_META) |
0ef1efd1 PNA |
782 | if (ctx->family == NFPROTO_BRIDGE) |
783 | return ERR_PTR(-EAGAIN); | |
784 | #endif | |
e035b77a ABG |
785 | if (tb[NFTA_META_DREG]) |
786 | return &nft_meta_get_ops; | |
787 | ||
788 | if (tb[NFTA_META_SREG]) | |
789 | return &nft_meta_set_ops; | |
790 | ||
791 | return ERR_PTR(-EINVAL); | |
792 | } | |
793 | ||
8a22543c | 794 | struct nft_expr_type nft_meta_type __read_mostly = { |
ef1f7df9 | 795 | .name = "meta", |
d4ef3835 | 796 | .select_ops = nft_meta_select_ops, |
96518518 PM |
797 | .policy = nft_meta_policy, |
798 | .maxattr = NFTA_META_MAX, | |
ef1f7df9 | 799 | .owner = THIS_MODULE, |
96518518 | 800 | }; |
fb961945 CG |
801 | |
802 | #ifdef CONFIG_NETWORK_SECMARK | |
803 | struct nft_secmark { | |
804 | u32 secid; | |
805 | char *ctx; | |
806 | }; | |
807 | ||
808 | static const struct nla_policy nft_secmark_policy[NFTA_SECMARK_MAX + 1] = { | |
809 | [NFTA_SECMARK_CTX] = { .type = NLA_STRING, .len = NFT_SECMARK_CTX_MAXLEN }, | |
810 | }; | |
811 | ||
812 | static int nft_secmark_compute_secid(struct nft_secmark *priv) | |
813 | { | |
814 | u32 tmp_secid = 0; | |
815 | int err; | |
816 | ||
817 | err = security_secctx_to_secid(priv->ctx, strlen(priv->ctx), &tmp_secid); | |
818 | if (err) | |
819 | return err; | |
820 | ||
821 | if (!tmp_secid) | |
822 | return -ENOENT; | |
823 | ||
824 | err = security_secmark_relabel_packet(tmp_secid); | |
825 | if (err) | |
826 | return err; | |
827 | ||
828 | priv->secid = tmp_secid; | |
829 | return 0; | |
830 | } | |
831 | ||
832 | static void nft_secmark_obj_eval(struct nft_object *obj, struct nft_regs *regs, | |
833 | const struct nft_pktinfo *pkt) | |
834 | { | |
835 | const struct nft_secmark *priv = nft_obj_data(obj); | |
836 | struct sk_buff *skb = pkt->skb; | |
837 | ||
838 | skb->secmark = priv->secid; | |
839 | } | |
840 | ||
841 | static int nft_secmark_obj_init(const struct nft_ctx *ctx, | |
842 | const struct nlattr * const tb[], | |
843 | struct nft_object *obj) | |
844 | { | |
845 | struct nft_secmark *priv = nft_obj_data(obj); | |
846 | int err; | |
847 | ||
848 | if (tb[NFTA_SECMARK_CTX] == NULL) | |
849 | return -EINVAL; | |
850 | ||
851 | priv->ctx = nla_strdup(tb[NFTA_SECMARK_CTX], GFP_KERNEL); | |
852 | if (!priv->ctx) | |
853 | return -ENOMEM; | |
854 | ||
855 | err = nft_secmark_compute_secid(priv); | |
856 | if (err) { | |
857 | kfree(priv->ctx); | |
858 | return err; | |
859 | } | |
860 | ||
861 | security_secmark_refcount_inc(); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int nft_secmark_obj_dump(struct sk_buff *skb, struct nft_object *obj, | |
867 | bool reset) | |
868 | { | |
869 | struct nft_secmark *priv = nft_obj_data(obj); | |
870 | int err; | |
871 | ||
872 | if (nla_put_string(skb, NFTA_SECMARK_CTX, priv->ctx)) | |
873 | return -1; | |
874 | ||
875 | if (reset) { | |
876 | err = nft_secmark_compute_secid(priv); | |
877 | if (err) | |
878 | return err; | |
879 | } | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | static void nft_secmark_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj) | |
885 | { | |
886 | struct nft_secmark *priv = nft_obj_data(obj); | |
887 | ||
888 | security_secmark_refcount_dec(); | |
889 | ||
890 | kfree(priv->ctx); | |
891 | } | |
892 | ||
893 | static const struct nft_object_ops nft_secmark_obj_ops = { | |
894 | .type = &nft_secmark_obj_type, | |
895 | .size = sizeof(struct nft_secmark), | |
896 | .init = nft_secmark_obj_init, | |
897 | .eval = nft_secmark_obj_eval, | |
898 | .dump = nft_secmark_obj_dump, | |
899 | .destroy = nft_secmark_obj_destroy, | |
900 | }; | |
901 | struct nft_object_type nft_secmark_obj_type __read_mostly = { | |
902 | .type = NFT_OBJECT_SECMARK, | |
903 | .ops = &nft_secmark_obj_ops, | |
904 | .maxattr = NFTA_SECMARK_MAX, | |
905 | .policy = nft_secmark_policy, | |
906 | .owner = THIS_MODULE, | |
907 | }; | |
908 | #endif /* CONFIG_NETWORK_SECMARK */ |