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5b497af4 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7f8a436e JS |
2 | /* |
3 | * Copyright (c) 2015 Nicira, Inc. | |
7f8a436e JS |
4 | */ |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/openvswitch.h> | |
05752523 JR |
8 | #include <linux/tcp.h> |
9 | #include <linux/udp.h> | |
10 | #include <linux/sctp.h> | |
11efd5cb | 11 | #include <linux/static_key.h> |
5c72b4c6 | 12 | #include <linux/string_helpers.h> |
7f8a436e | 13 | #include <net/ip.h> |
11efd5cb | 14 | #include <net/genetlink.h> |
7f8a436e | 15 | #include <net/netfilter/nf_conntrack_core.h> |
11efd5cb | 16 | #include <net/netfilter/nf_conntrack_count.h> |
cae3a262 | 17 | #include <net/netfilter/nf_conntrack_helper.h> |
c2ac6673 | 18 | #include <net/netfilter/nf_conntrack_labels.h> |
05752523 | 19 | #include <net/netfilter/nf_conntrack_seqadj.h> |
06bd2bdf | 20 | #include <net/netfilter/nf_conntrack_timeout.h> |
7f8a436e JS |
21 | #include <net/netfilter/nf_conntrack_zones.h> |
22 | #include <net/netfilter/ipv6/nf_defrag_ipv6.h> | |
70b095c8 | 23 | #include <net/ipv6_frag.h> |
7f8a436e | 24 | |
4806e975 | 25 | #if IS_ENABLED(CONFIG_NF_NAT) |
d2c5c103 | 26 | #include <net/netfilter/nf_nat.h> |
05752523 JR |
27 | #endif |
28 | ||
b702436a PB |
29 | #include <net/netfilter/nf_conntrack_act_ct.h> |
30 | ||
7f8a436e | 31 | #include "datapath.h" |
43d95b30 | 32 | #include "drop.h" |
7f8a436e JS |
33 | #include "conntrack.h" |
34 | #include "flow.h" | |
35 | #include "flow_netlink.h" | |
36 | ||
37 | struct ovs_ct_len_tbl { | |
05752523 JR |
38 | int maxlen; |
39 | int minlen; | |
7f8a436e JS |
40 | }; |
41 | ||
182e3042 JS |
42 | /* Metadata mark for masked write to conntrack mark */ |
43 | struct md_mark { | |
44 | u32 value; | |
45 | u32 mask; | |
46 | }; | |
47 | ||
c2ac6673 | 48 | /* Metadata label for masked write to conntrack label. */ |
33db4125 JS |
49 | struct md_labels { |
50 | struct ovs_key_ct_labels value; | |
51 | struct ovs_key_ct_labels mask; | |
c2ac6673 JS |
52 | }; |
53 | ||
05752523 JR |
54 | enum ovs_ct_nat { |
55 | OVS_CT_NAT = 1 << 0, /* NAT for committed connections only. */ | |
56 | OVS_CT_SRC_NAT = 1 << 1, /* Source NAT for NEW connections. */ | |
57 | OVS_CT_DST_NAT = 1 << 2, /* Destination NAT for NEW connections. */ | |
58 | }; | |
59 | ||
7f8a436e JS |
60 | /* Conntrack action context for execution. */ |
61 | struct ovs_conntrack_info { | |
cae3a262 | 62 | struct nf_conntrack_helper *helper; |
7f8a436e JS |
63 | struct nf_conntrack_zone zone; |
64 | struct nf_conn *ct; | |
ab38a7b5 | 65 | u8 commit : 1; |
05752523 | 66 | u8 nat : 3; /* enum ovs_ct_nat */ |
dd41d33f | 67 | u8 force : 1; |
12064551 | 68 | u8 have_eventmask : 1; |
7f8a436e | 69 | u16 family; |
12064551 | 70 | u32 eventmask; /* Mask of 1 << IPCT_*. */ |
182e3042 | 71 | struct md_mark mark; |
33db4125 | 72 | struct md_labels labels; |
06bd2bdf | 73 | char timeout[CTNL_TIMEOUT_NAME_MAX]; |
71778951 | 74 | struct nf_ct_timeout *nf_ct_timeout; |
4806e975 | 75 | #if IS_ENABLED(CONFIG_NF_NAT) |
2eb0f624 | 76 | struct nf_nat_range2 range; /* Only present for SRC NAT and DST NAT. */ |
05752523 | 77 | #endif |
7f8a436e JS |
78 | }; |
79 | ||
11efd5cb YHW |
80 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
81 | #define OVS_CT_LIMIT_UNLIMITED 0 | |
82 | #define OVS_CT_LIMIT_DEFAULT OVS_CT_LIMIT_UNLIMITED | |
83 | #define CT_LIMIT_HASH_BUCKETS 512 | |
84 | static DEFINE_STATIC_KEY_FALSE(ovs_ct_limit_enabled); | |
85 | ||
86 | struct ovs_ct_limit { | |
87 | /* Elements in ovs_ct_limit_info->limits hash table */ | |
88 | struct hlist_node hlist_node; | |
89 | struct rcu_head rcu; | |
90 | u16 zone; | |
91 | u32 limit; | |
92 | }; | |
93 | ||
94 | struct ovs_ct_limit_info { | |
95 | u32 default_limit; | |
96 | struct hlist_head *limits; | |
97 | struct nf_conncount_data *data; | |
98 | }; | |
99 | ||
100 | static const struct nla_policy ct_limit_policy[OVS_CT_LIMIT_ATTR_MAX + 1] = { | |
101 | [OVS_CT_LIMIT_ATTR_ZONE_LIMIT] = { .type = NLA_NESTED, }, | |
102 | }; | |
103 | #endif | |
104 | ||
09aa98ad JR |
105 | static bool labels_nonzero(const struct ovs_key_ct_labels *labels); |
106 | ||
2f3ab9f9 JS |
107 | static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info); |
108 | ||
7f8a436e JS |
109 | static u16 key_to_nfproto(const struct sw_flow_key *key) |
110 | { | |
111 | switch (ntohs(key->eth.type)) { | |
112 | case ETH_P_IP: | |
113 | return NFPROTO_IPV4; | |
114 | case ETH_P_IPV6: | |
115 | return NFPROTO_IPV6; | |
116 | default: | |
117 | return NFPROTO_UNSPEC; | |
118 | } | |
119 | } | |
120 | ||
121 | /* Map SKB connection state into the values used by flow definition. */ | |
122 | static u8 ovs_ct_get_state(enum ip_conntrack_info ctinfo) | |
123 | { | |
124 | u8 ct_state = OVS_CS_F_TRACKED; | |
125 | ||
126 | switch (ctinfo) { | |
127 | case IP_CT_ESTABLISHED_REPLY: | |
128 | case IP_CT_RELATED_REPLY: | |
7f8a436e JS |
129 | ct_state |= OVS_CS_F_REPLY_DIR; |
130 | break; | |
131 | default: | |
132 | break; | |
133 | } | |
134 | ||
135 | switch (ctinfo) { | |
136 | case IP_CT_ESTABLISHED: | |
137 | case IP_CT_ESTABLISHED_REPLY: | |
138 | ct_state |= OVS_CS_F_ESTABLISHED; | |
139 | break; | |
140 | case IP_CT_RELATED: | |
141 | case IP_CT_RELATED_REPLY: | |
142 | ct_state |= OVS_CS_F_RELATED; | |
143 | break; | |
144 | case IP_CT_NEW: | |
7f8a436e JS |
145 | ct_state |= OVS_CS_F_NEW; |
146 | break; | |
147 | default: | |
148 | break; | |
149 | } | |
150 | ||
151 | return ct_state; | |
152 | } | |
153 | ||
0d5cdef8 JS |
154 | static u32 ovs_ct_get_mark(const struct nf_conn *ct) |
155 | { | |
156 | #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) | |
52d1aa8b | 157 | return ct ? READ_ONCE(ct->mark) : 0; |
0d5cdef8 JS |
158 | #else |
159 | return 0; | |
160 | #endif | |
161 | } | |
162 | ||
b87cec38 JR |
163 | /* Guard against conntrack labels max size shrinking below 128 bits. */ |
164 | #if NF_CT_LABELS_MAX_SIZE < 16 | |
165 | #error NF_CT_LABELS_MAX_SIZE must be at least 16 bytes | |
166 | #endif | |
167 | ||
33db4125 JS |
168 | static void ovs_ct_get_labels(const struct nf_conn *ct, |
169 | struct ovs_key_ct_labels *labels) | |
c2ac6673 JS |
170 | { |
171 | struct nf_conn_labels *cl = ct ? nf_ct_labels_find(ct) : NULL; | |
172 | ||
b87cec38 JR |
173 | if (cl) |
174 | memcpy(labels, cl->bits, OVS_CT_LABELS_LEN); | |
175 | else | |
33db4125 | 176 | memset(labels, 0, OVS_CT_LABELS_LEN); |
c2ac6673 JS |
177 | } |
178 | ||
9dd7f890 JR |
179 | static void __ovs_ct_update_key_orig_tp(struct sw_flow_key *key, |
180 | const struct nf_conntrack_tuple *orig, | |
181 | u8 icmp_proto) | |
182 | { | |
316d4d78 | 183 | key->ct_orig_proto = orig->dst.protonum; |
9dd7f890 JR |
184 | if (orig->dst.protonum == icmp_proto) { |
185 | key->ct.orig_tp.src = htons(orig->dst.u.icmp.type); | |
186 | key->ct.orig_tp.dst = htons(orig->dst.u.icmp.code); | |
187 | } else { | |
188 | key->ct.orig_tp.src = orig->src.u.all; | |
189 | key->ct.orig_tp.dst = orig->dst.u.all; | |
190 | } | |
191 | } | |
192 | ||
7f8a436e | 193 | static void __ovs_ct_update_key(struct sw_flow_key *key, u8 state, |
182e3042 JS |
194 | const struct nf_conntrack_zone *zone, |
195 | const struct nf_conn *ct) | |
7f8a436e | 196 | { |
316d4d78 JR |
197 | key->ct_state = state; |
198 | key->ct_zone = zone->id; | |
0d5cdef8 | 199 | key->ct.mark = ovs_ct_get_mark(ct); |
33db4125 | 200 | ovs_ct_get_labels(ct, &key->ct.labels); |
9dd7f890 JR |
201 | |
202 | if (ct) { | |
203 | const struct nf_conntrack_tuple *orig; | |
204 | ||
205 | /* Use the master if we have one. */ | |
206 | if (ct->master) | |
207 | ct = ct->master; | |
208 | orig = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple; | |
209 | ||
210 | /* IP version must match with the master connection. */ | |
211 | if (key->eth.type == htons(ETH_P_IP) && | |
212 | nf_ct_l3num(ct) == NFPROTO_IPV4) { | |
213 | key->ipv4.ct_orig.src = orig->src.u3.ip; | |
214 | key->ipv4.ct_orig.dst = orig->dst.u3.ip; | |
215 | __ovs_ct_update_key_orig_tp(key, orig, IPPROTO_ICMP); | |
216 | return; | |
217 | } else if (key->eth.type == htons(ETH_P_IPV6) && | |
218 | !sw_flow_key_is_nd(key) && | |
219 | nf_ct_l3num(ct) == NFPROTO_IPV6) { | |
220 | key->ipv6.ct_orig.src = orig->src.u3.in6; | |
221 | key->ipv6.ct_orig.dst = orig->dst.u3.in6; | |
222 | __ovs_ct_update_key_orig_tp(key, orig, NEXTHDR_ICMP); | |
223 | return; | |
224 | } | |
225 | } | |
316d4d78 | 226 | /* Clear 'ct_orig_proto' to mark the non-existence of conntrack |
9dd7f890 JR |
227 | * original direction key fields. |
228 | */ | |
316d4d78 | 229 | key->ct_orig_proto = 0; |
7f8a436e JS |
230 | } |
231 | ||
5e17da63 | 232 | /* Update 'key' based on skb->_nfct. If 'post_ct' is true, then OVS has |
05752523 JR |
233 | * previously sent the packet to conntrack via the ct action. If |
234 | * 'keep_nat_flags' is true, the existing NAT flags retained, else they are | |
235 | * initialized from the connection status. | |
7f8a436e JS |
236 | */ |
237 | static void ovs_ct_update_key(const struct sk_buff *skb, | |
d110986c | 238 | const struct ovs_conntrack_info *info, |
05752523 JR |
239 | struct sw_flow_key *key, bool post_ct, |
240 | bool keep_nat_flags) | |
7f8a436e JS |
241 | { |
242 | const struct nf_conntrack_zone *zone = &nf_ct_zone_dflt; | |
243 | enum ip_conntrack_info ctinfo; | |
244 | struct nf_conn *ct; | |
245 | u8 state = 0; | |
246 | ||
247 | ct = nf_ct_get(skb, &ctinfo); | |
248 | if (ct) { | |
249 | state = ovs_ct_get_state(ctinfo); | |
9f13ded8 | 250 | /* All unconfirmed entries are NEW connections. */ |
4f0909ee JS |
251 | if (!nf_ct_is_confirmed(ct)) |
252 | state |= OVS_CS_F_NEW; | |
9f13ded8 JR |
253 | /* OVS persists the related flag for the duration of the |
254 | * connection. | |
255 | */ | |
7f8a436e JS |
256 | if (ct->master) |
257 | state |= OVS_CS_F_RELATED; | |
05752523 | 258 | if (keep_nat_flags) { |
316d4d78 | 259 | state |= key->ct_state & OVS_CS_F_NAT_MASK; |
05752523 JR |
260 | } else { |
261 | if (ct->status & IPS_SRC_NAT) | |
262 | state |= OVS_CS_F_SRC_NAT; | |
263 | if (ct->status & IPS_DST_NAT) | |
264 | state |= OVS_CS_F_DST_NAT; | |
265 | } | |
7f8a436e JS |
266 | zone = nf_ct_zone(ct); |
267 | } else if (post_ct) { | |
268 | state = OVS_CS_F_TRACKED | OVS_CS_F_INVALID; | |
d110986c JS |
269 | if (info) |
270 | zone = &info->zone; | |
7f8a436e | 271 | } |
182e3042 | 272 | __ovs_ct_update_key(key, state, zone, ct); |
7f8a436e JS |
273 | } |
274 | ||
9f13ded8 JR |
275 | /* This is called to initialize CT key fields possibly coming in from the local |
276 | * stack. | |
277 | */ | |
d29334c1 | 278 | void ovs_ct_fill_key(const struct sk_buff *skb, |
279 | struct sw_flow_key *key, | |
280 | bool post_ct) | |
7f8a436e | 281 | { |
d29334c1 | 282 | ovs_ct_update_key(skb, NULL, key, post_ct, false); |
7f8a436e JS |
283 | } |
284 | ||
9dd7f890 JR |
285 | int ovs_ct_put_key(const struct sw_flow_key *swkey, |
286 | const struct sw_flow_key *output, struct sk_buff *skb) | |
7f8a436e | 287 | { |
316d4d78 | 288 | if (nla_put_u32(skb, OVS_KEY_ATTR_CT_STATE, output->ct_state)) |
7f8a436e JS |
289 | return -EMSGSIZE; |
290 | ||
291 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && | |
316d4d78 | 292 | nla_put_u16(skb, OVS_KEY_ATTR_CT_ZONE, output->ct_zone)) |
7f8a436e JS |
293 | return -EMSGSIZE; |
294 | ||
182e3042 | 295 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && |
9dd7f890 | 296 | nla_put_u32(skb, OVS_KEY_ATTR_CT_MARK, output->ct.mark)) |
182e3042 JS |
297 | return -EMSGSIZE; |
298 | ||
9723e6ab | 299 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && |
9dd7f890 JR |
300 | nla_put(skb, OVS_KEY_ATTR_CT_LABELS, sizeof(output->ct.labels), |
301 | &output->ct.labels)) | |
c2ac6673 JS |
302 | return -EMSGSIZE; |
303 | ||
316d4d78 | 304 | if (swkey->ct_orig_proto) { |
9dd7f890 | 305 | if (swkey->eth.type == htons(ETH_P_IP)) { |
9aba6c5b PY |
306 | struct ovs_key_ct_tuple_ipv4 orig; |
307 | ||
308 | memset(&orig, 0, sizeof(orig)); | |
309 | orig.ipv4_src = output->ipv4.ct_orig.src; | |
310 | orig.ipv4_dst = output->ipv4.ct_orig.dst; | |
311 | orig.src_port = output->ct.orig_tp.src; | |
312 | orig.dst_port = output->ct.orig_tp.dst; | |
313 | orig.ipv4_proto = output->ct_orig_proto; | |
314 | ||
9dd7f890 JR |
315 | if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4, |
316 | sizeof(orig), &orig)) | |
317 | return -EMSGSIZE; | |
318 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
9aba6c5b PY |
319 | struct ovs_key_ct_tuple_ipv6 orig; |
320 | ||
321 | memset(&orig, 0, sizeof(orig)); | |
322 | memcpy(orig.ipv6_src, output->ipv6.ct_orig.src.s6_addr32, | |
323 | sizeof(orig.ipv6_src)); | |
324 | memcpy(orig.ipv6_dst, output->ipv6.ct_orig.dst.s6_addr32, | |
325 | sizeof(orig.ipv6_dst)); | |
326 | orig.src_port = output->ct.orig_tp.src; | |
327 | orig.dst_port = output->ct.orig_tp.dst; | |
328 | orig.ipv6_proto = output->ct_orig_proto; | |
329 | ||
9dd7f890 JR |
330 | if (nla_put(skb, OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6, |
331 | sizeof(orig), &orig)) | |
332 | return -EMSGSIZE; | |
333 | } | |
334 | } | |
335 | ||
182e3042 JS |
336 | return 0; |
337 | } | |
338 | ||
6ffcea79 | 339 | static int ovs_ct_set_mark(struct nf_conn *ct, struct sw_flow_key *key, |
182e3042 JS |
340 | u32 ct_mark, u32 mask) |
341 | { | |
0d5cdef8 | 342 | #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) |
182e3042 JS |
343 | u32 new_mark; |
344 | ||
52d1aa8b DX |
345 | new_mark = ct_mark | (READ_ONCE(ct->mark) & ~(mask)); |
346 | if (READ_ONCE(ct->mark) != new_mark) { | |
347 | WRITE_ONCE(ct->mark, new_mark); | |
193e3096 JR |
348 | if (nf_ct_is_confirmed(ct)) |
349 | nf_conntrack_event_cache(IPCT_MARK, ct); | |
182e3042 JS |
350 | key->ct.mark = new_mark; |
351 | } | |
352 | ||
7f8a436e | 353 | return 0; |
0d5cdef8 JS |
354 | #else |
355 | return -ENOTSUPP; | |
356 | #endif | |
7f8a436e JS |
357 | } |
358 | ||
6ffcea79 | 359 | static struct nf_conn_labels *ovs_ct_get_conn_labels(struct nf_conn *ct) |
c2ac6673 | 360 | { |
c2ac6673 | 361 | struct nf_conn_labels *cl; |
c2ac6673 JS |
362 | |
363 | cl = nf_ct_labels_find(ct); | |
364 | if (!cl) { | |
365 | nf_ct_labels_ext_add(ct); | |
366 | cl = nf_ct_labels_find(ct); | |
367 | } | |
6ffcea79 JR |
368 | |
369 | return cl; | |
370 | } | |
371 | ||
372 | /* Initialize labels for a new, yet to be committed conntrack entry. Note that | |
373 | * since the new connection is not yet confirmed, and thus no-one else has | |
2317c6b5 | 374 | * access to it's labels, we simply write them over. |
6ffcea79 JR |
375 | */ |
376 | static int ovs_ct_init_labels(struct nf_conn *ct, struct sw_flow_key *key, | |
377 | const struct ovs_key_ct_labels *labels, | |
378 | const struct ovs_key_ct_labels *mask) | |
379 | { | |
09aa98ad JR |
380 | struct nf_conn_labels *cl, *master_cl; |
381 | bool have_mask = labels_nonzero(mask); | |
382 | ||
383 | /* Inherit master's labels to the related connection? */ | |
384 | master_cl = ct->master ? nf_ct_labels_find(ct->master) : NULL; | |
385 | ||
386 | if (!master_cl && !have_mask) | |
387 | return 0; /* Nothing to do. */ | |
6ffcea79 JR |
388 | |
389 | cl = ovs_ct_get_conn_labels(ct); | |
b87cec38 | 390 | if (!cl) |
c2ac6673 JS |
391 | return -ENOSPC; |
392 | ||
09aa98ad JR |
393 | /* Inherit the master's labels, if any. */ |
394 | if (master_cl) | |
395 | *cl = *master_cl; | |
396 | ||
397 | if (have_mask) { | |
398 | u32 *dst = (u32 *)cl->bits; | |
399 | int i; | |
400 | ||
401 | for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) | |
402 | dst[i] = (dst[i] & ~mask->ct_labels_32[i]) | | |
403 | (labels->ct_labels_32[i] | |
404 | & mask->ct_labels_32[i]); | |
405 | } | |
193e3096 | 406 | |
2317c6b5 | 407 | /* Labels are included in the IPCTNL_MSG_CT_NEW event only if the |
abd0a4f2 | 408 | * IPCT_LABEL bit is set in the event cache. |
2317c6b5 JR |
409 | */ |
410 | nf_conntrack_event_cache(IPCT_LABEL, ct); | |
411 | ||
6ffcea79 JR |
412 | memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | static int ovs_ct_set_labels(struct nf_conn *ct, struct sw_flow_key *key, | |
418 | const struct ovs_key_ct_labels *labels, | |
419 | const struct ovs_key_ct_labels *mask) | |
420 | { | |
421 | struct nf_conn_labels *cl; | |
422 | int err; | |
423 | ||
424 | cl = ovs_ct_get_conn_labels(ct); | |
425 | if (!cl) | |
426 | return -ENOSPC; | |
427 | ||
428 | err = nf_connlabels_replace(ct, labels->ct_labels_32, | |
429 | mask->ct_labels_32, | |
430 | OVS_CT_LABELS_LEN_32); | |
431 | if (err) | |
432 | return err; | |
433 | ||
434 | memcpy(&key->ct.labels, cl->bits, OVS_CT_LABELS_LEN); | |
c2ac6673 | 435 | |
c2ac6673 JS |
436 | return 0; |
437 | } | |
438 | ||
1b83bf44 XL |
439 | static int ovs_ct_handle_fragments(struct net *net, struct sw_flow_key *key, |
440 | u16 zone, int family, struct sk_buff *skb) | |
441 | { | |
442 | struct ovs_skb_cb ovs_cb = *OVS_CB(skb); | |
443 | int err; | |
444 | ||
0785407e | 445 | err = nf_ct_handle_fragments(net, skb, zone, family, &key->ip.proto, &ovs_cb.mru); |
1b83bf44 XL |
446 | if (err) |
447 | return err; | |
448 | ||
ad06a566 GR |
449 | /* The key extracted from the fragment that completed this datagram |
450 | * likely didn't have an L4 header, so regenerate it. | |
451 | */ | |
452 | ovs_flow_key_update_l3l4(skb, key); | |
7f8a436e | 453 | key->ip.frag = OVS_FRAG_TYPE_NONE; |
7f8a436e JS |
454 | *OVS_CB(skb) = ovs_cb; |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
289f2253 JR |
459 | /* This replicates logic from nf_conntrack_core.c that is not exported. */ |
460 | static enum ip_conntrack_info | |
461 | ovs_ct_get_info(const struct nf_conntrack_tuple_hash *h) | |
462 | { | |
463 | const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); | |
464 | ||
465 | if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) | |
466 | return IP_CT_ESTABLISHED_REPLY; | |
467 | /* Once we've had two way comms, always ESTABLISHED. */ | |
468 | if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) | |
469 | return IP_CT_ESTABLISHED; | |
470 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) | |
471 | return IP_CT_RELATED; | |
472 | return IP_CT_NEW; | |
473 | } | |
474 | ||
475 | /* Find an existing connection which this packet belongs to without | |
476 | * re-attributing statistics or modifying the connection state. This allows an | |
5e17da63 | 477 | * skb->_nfct lost due to an upcall to be recovered during actions execution. |
289f2253 JR |
478 | * |
479 | * Must be called with rcu_read_lock. | |
480 | * | |
5e17da63 JR |
481 | * On success, populates skb->_nfct and returns the connection. Returns NULL |
482 | * if there is no existing entry. | |
289f2253 JR |
483 | */ |
484 | static struct nf_conn * | |
485 | ovs_ct_find_existing(struct net *net, const struct nf_conntrack_zone *zone, | |
9ff464db | 486 | u8 l3num, struct sk_buff *skb, bool natted) |
289f2253 | 487 | { |
289f2253 JR |
488 | struct nf_conntrack_tuple tuple; |
489 | struct nf_conntrack_tuple_hash *h; | |
289f2253 | 490 | struct nf_conn *ct; |
289f2253 | 491 | |
60e3be94 FW |
492 | if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), l3num, |
493 | net, &tuple)) { | |
289f2253 JR |
494 | pr_debug("ovs_ct_find_existing: Can't get tuple\n"); |
495 | return NULL; | |
496 | } | |
497 | ||
9ff464db JR |
498 | /* Must invert the tuple if skb has been transformed by NAT. */ |
499 | if (natted) { | |
500 | struct nf_conntrack_tuple inverse; | |
501 | ||
303e0c55 | 502 | if (!nf_ct_invert_tuple(&inverse, &tuple)) { |
9ff464db JR |
503 | pr_debug("ovs_ct_find_existing: Inversion failed!\n"); |
504 | return NULL; | |
505 | } | |
506 | tuple = inverse; | |
507 | } | |
508 | ||
289f2253 JR |
509 | /* look for tuple match */ |
510 | h = nf_conntrack_find_get(net, zone, &tuple); | |
511 | if (!h) | |
512 | return NULL; /* Not found. */ | |
513 | ||
514 | ct = nf_ct_tuplehash_to_ctrack(h); | |
515 | ||
9ff464db JR |
516 | /* Inverted packet tuple matches the reverse direction conntrack tuple, |
517 | * select the other tuplehash to get the right 'ctinfo' bits for this | |
518 | * packet. | |
519 | */ | |
520 | if (natted) | |
521 | h = &ct->tuplehash[!h->tuple.dst.dir]; | |
522 | ||
c74454fa | 523 | nf_ct_set(skb, ct, ovs_ct_get_info(h)); |
289f2253 JR |
524 | return ct; |
525 | } | |
526 | ||
8b97ac5b GR |
527 | static |
528 | struct nf_conn *ovs_ct_executed(struct net *net, | |
529 | const struct sw_flow_key *key, | |
530 | const struct ovs_conntrack_info *info, | |
531 | struct sk_buff *skb, | |
532 | bool *ct_executed) | |
533 | { | |
534 | struct nf_conn *ct = NULL; | |
535 | ||
536 | /* If no ct, check if we have evidence that an existing conntrack entry | |
537 | * might be found for this skb. This happens when we lose a skb->_nfct | |
538 | * due to an upcall, or if the direction is being forced. If the | |
539 | * connection was not confirmed, it is not cached and needs to be run | |
540 | * through conntrack again. | |
541 | */ | |
542 | *ct_executed = (key->ct_state & OVS_CS_F_TRACKED) && | |
543 | !(key->ct_state & OVS_CS_F_INVALID) && | |
544 | (key->ct_zone == info->zone.id); | |
545 | ||
546 | if (*ct_executed || (!key->ct_state && info->force)) { | |
547 | ct = ovs_ct_find_existing(net, &info->zone, info->family, skb, | |
548 | !!(key->ct_state & | |
549 | OVS_CS_F_NAT_MASK)); | |
550 | } | |
551 | ||
552 | return ct; | |
553 | } | |
554 | ||
5e17da63 | 555 | /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */ |
289f2253 JR |
556 | static bool skb_nfct_cached(struct net *net, |
557 | const struct sw_flow_key *key, | |
558 | const struct ovs_conntrack_info *info, | |
559 | struct sk_buff *skb) | |
7f8a436e JS |
560 | { |
561 | enum ip_conntrack_info ctinfo; | |
562 | struct nf_conn *ct; | |
8b97ac5b | 563 | bool ct_executed = true; |
7f8a436e JS |
564 | |
565 | ct = nf_ct_get(skb, &ctinfo); | |
566 | if (!ct) | |
8b97ac5b GR |
567 | ct = ovs_ct_executed(net, key, info, skb, &ct_executed); |
568 | ||
569 | if (ct) | |
570 | nf_ct_get(skb, &ctinfo); | |
571 | else | |
7f8a436e | 572 | return false; |
8b97ac5b | 573 | |
7f8a436e JS |
574 | if (!net_eq(net, read_pnet(&ct->ct_net))) |
575 | return false; | |
576 | if (!nf_ct_zone_equal_any(info->ct, nf_ct_zone(ct))) | |
577 | return false; | |
cae3a262 JS |
578 | if (info->helper) { |
579 | struct nf_conn_help *help; | |
580 | ||
581 | help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER); | |
582 | if (help && rcu_access_pointer(help->helper) != info->helper) | |
583 | return false; | |
584 | } | |
71778951 YHW |
585 | if (info->nf_ct_timeout) { |
586 | struct nf_conn_timeout *timeout_ext; | |
587 | ||
588 | timeout_ext = nf_ct_timeout_find(ct); | |
589 | if (!timeout_ext || info->nf_ct_timeout != | |
590 | rcu_dereference(timeout_ext->timeout)) | |
591 | return false; | |
592 | } | |
dd41d33f JR |
593 | /* Force conntrack entry direction to the current packet? */ |
594 | if (info->force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) { | |
595 | /* Delete the conntrack entry if confirmed, else just release | |
596 | * the reference. | |
597 | */ | |
598 | if (nf_ct_is_confirmed(ct)) | |
599 | nf_ct_delete(ct, 0, 0); | |
b768b16d | 600 | |
408bdcfc | 601 | nf_ct_put(ct); |
dd41d33f JR |
602 | nf_ct_set(skb, NULL, 0); |
603 | return false; | |
604 | } | |
7f8a436e | 605 | |
8b97ac5b | 606 | return ct_executed; |
7f8a436e JS |
607 | } |
608 | ||
4806e975 | 609 | #if IS_ENABLED(CONFIG_NF_NAT) |
60b44ca6 AC |
610 | static void ovs_nat_update_key(struct sw_flow_key *key, |
611 | const struct sk_buff *skb, | |
612 | enum nf_nat_manip_type maniptype) | |
613 | { | |
614 | if (maniptype == NF_NAT_MANIP_SRC) { | |
615 | __be16 src; | |
616 | ||
617 | key->ct_state |= OVS_CS_F_SRC_NAT; | |
618 | if (key->eth.type == htons(ETH_P_IP)) | |
619 | key->ipv4.addr.src = ip_hdr(skb)->saddr; | |
620 | else if (key->eth.type == htons(ETH_P_IPV6)) | |
621 | memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr, | |
622 | sizeof(key->ipv6.addr.src)); | |
623 | else | |
624 | return; | |
625 | ||
626 | if (key->ip.proto == IPPROTO_UDP) | |
627 | src = udp_hdr(skb)->source; | |
628 | else if (key->ip.proto == IPPROTO_TCP) | |
629 | src = tcp_hdr(skb)->source; | |
630 | else if (key->ip.proto == IPPROTO_SCTP) | |
631 | src = sctp_hdr(skb)->source; | |
632 | else | |
633 | return; | |
634 | ||
635 | key->tp.src = src; | |
636 | } else { | |
637 | __be16 dst; | |
638 | ||
639 | key->ct_state |= OVS_CS_F_DST_NAT; | |
640 | if (key->eth.type == htons(ETH_P_IP)) | |
641 | key->ipv4.addr.dst = ip_hdr(skb)->daddr; | |
642 | else if (key->eth.type == htons(ETH_P_IPV6)) | |
643 | memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr, | |
644 | sizeof(key->ipv6.addr.dst)); | |
645 | else | |
646 | return; | |
647 | ||
648 | if (key->ip.proto == IPPROTO_UDP) | |
649 | dst = udp_hdr(skb)->dest; | |
650 | else if (key->ip.proto == IPPROTO_TCP) | |
651 | dst = tcp_hdr(skb)->dest; | |
652 | else if (key->ip.proto == IPPROTO_SCTP) | |
653 | dst = sctp_hdr(skb)->dest; | |
654 | else | |
655 | return; | |
656 | ||
657 | key->tp.dst = dst; | |
658 | } | |
659 | } | |
660 | ||
05752523 JR |
661 | /* Returns NF_DROP if the packet should be dropped, NF_ACCEPT otherwise. */ |
662 | static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, | |
663 | const struct ovs_conntrack_info *info, | |
664 | struct sk_buff *skb, struct nf_conn *ct, | |
665 | enum ip_conntrack_info ctinfo) | |
666 | { | |
ebddb140 | 667 | int err, action = 0; |
05752523 | 668 | |
77959289 XL |
669 | if (!(info->nat & OVS_CT_NAT)) |
670 | return NF_ACCEPT; | |
ebddb140 XL |
671 | if (info->nat & OVS_CT_SRC_NAT) |
672 | action |= BIT(NF_NAT_MANIP_SRC); | |
673 | if (info->nat & OVS_CT_DST_NAT) | |
674 | action |= BIT(NF_NAT_MANIP_DST); | |
77959289 | 675 | |
ebddb140 | 676 | err = nf_ct_nat(skb, ct, ctinfo, &action, &info->range, info->commit); |
05752523 | 677 | |
ebddb140 XL |
678 | if (action & BIT(NF_NAT_MANIP_SRC)) |
679 | ovs_nat_update_key(key, skb, NF_NAT_MANIP_SRC); | |
680 | if (action & BIT(NF_NAT_MANIP_DST)) | |
681 | ovs_nat_update_key(key, skb, NF_NAT_MANIP_DST); | |
5d50aa83 | 682 | |
05752523 JR |
683 | return err; |
684 | } | |
4806e975 | 685 | #else /* !CONFIG_NF_NAT */ |
05752523 JR |
686 | static int ovs_ct_nat(struct net *net, struct sw_flow_key *key, |
687 | const struct ovs_conntrack_info *info, | |
688 | struct sk_buff *skb, struct nf_conn *ct, | |
689 | enum ip_conntrack_info ctinfo) | |
690 | { | |
691 | return NF_ACCEPT; | |
692 | } | |
693 | #endif | |
694 | ||
9f13ded8 | 695 | /* Pass 'skb' through conntrack in 'net', using zone configured in 'info', if |
394e910e JR |
696 | * not done already. Update key with new CT state after passing the packet |
697 | * through conntrack. | |
5e17da63 | 698 | * Note that if the packet is deemed invalid by conntrack, skb->_nfct will be |
9f13ded8 JR |
699 | * set to NULL and 0 will be returned. |
700 | */ | |
4f0909ee | 701 | static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key, |
7f8a436e JS |
702 | const struct ovs_conntrack_info *info, |
703 | struct sk_buff *skb) | |
704 | { | |
705 | /* If we are recirculating packets to match on conntrack fields and | |
706 | * committing with a separate conntrack action, then we don't need to | |
707 | * actually run the packet through conntrack twice unless it's for a | |
708 | * different zone. | |
709 | */ | |
28b6e0c1 JR |
710 | bool cached = skb_nfct_cached(net, key, info, skb); |
711 | enum ip_conntrack_info ctinfo; | |
712 | struct nf_conn *ct; | |
713 | ||
714 | if (!cached) { | |
93e66024 FW |
715 | struct nf_hook_state state = { |
716 | .hook = NF_INET_PRE_ROUTING, | |
717 | .pf = info->family, | |
718 | .net = net, | |
719 | }; | |
7f8a436e | 720 | struct nf_conn *tmpl = info->ct; |
5b6b9293 | 721 | int err; |
7f8a436e JS |
722 | |
723 | /* Associate skb with specified zone. */ | |
724 | if (tmpl) { | |
408bdcfc FW |
725 | ct = nf_ct_get(skb, &ctinfo); |
726 | nf_ct_put(ct); | |
7f8a436e | 727 | nf_conntrack_get(&tmpl->ct_general); |
c74454fa | 728 | nf_ct_set(skb, tmpl, IP_CT_NEW); |
7f8a436e JS |
729 | } |
730 | ||
93e66024 | 731 | err = nf_conntrack_in(skb, &state); |
5b6b9293 | 732 | if (err != NF_ACCEPT) |
7f8a436e | 733 | return -ENOENT; |
cae3a262 | 734 | |
05752523 JR |
735 | /* Clear CT state NAT flags to mark that we have not yet done |
736 | * NAT after the nf_conntrack_in() call. We can actually clear | |
737 | * the whole state, as it will be re-initialized below. | |
738 | */ | |
316d4d78 | 739 | key->ct_state = 0; |
05752523 JR |
740 | |
741 | /* Update the key, but keep the NAT flags. */ | |
742 | ovs_ct_update_key(skb, info, key, true, true); | |
28b6e0c1 | 743 | } |
394e910e | 744 | |
28b6e0c1 | 745 | ct = nf_ct_get(skb, &ctinfo); |
05752523 | 746 | if (ct) { |
248d45f1 YHW |
747 | bool add_helper = false; |
748 | ||
05752523 JR |
749 | /* Packets starting a new connection must be NATted before the |
750 | * helper, so that the helper knows about the NAT. We enforce | |
751 | * this by delaying both NAT and helper calls for unconfirmed | |
752 | * connections until the committing CT action. For later | |
753 | * packets NAT and Helper may be called in either order. | |
754 | * | |
755 | * NAT will be done only if the CT action has NAT, and only | |
756 | * once per packet (per zone), as guarded by the NAT bits in | |
316d4d78 | 757 | * the key->ct_state. |
05752523 | 758 | */ |
316d4d78 | 759 | if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) && |
05752523 JR |
760 | (nf_ct_is_confirmed(ct) || info->commit) && |
761 | ovs_ct_nat(net, key, info, skb, ct, ctinfo) != NF_ACCEPT) { | |
762 | return -EINVAL; | |
763 | } | |
764 | ||
16ec3d4f | 765 | /* Userspace may decide to perform a ct lookup without a helper |
248d45f1 YHW |
766 | * specified followed by a (recirculate and) commit with one, |
767 | * or attach a helper in a later commit. Therefore, for | |
768 | * connections which we will commit, we may need to attach | |
769 | * the helper here. | |
16ec3d4f | 770 | */ |
3c186054 XL |
771 | if (!nf_ct_is_confirmed(ct) && info->commit && |
772 | info->helper && !nfct_help(ct)) { | |
16ec3d4f JS |
773 | int err = __nf_ct_try_assign_helper(ct, info->ct, |
774 | GFP_ATOMIC); | |
775 | if (err) | |
776 | return err; | |
248d45f1 | 777 | add_helper = true; |
fa7e428c FL |
778 | |
779 | /* helper installed, add seqadj if NAT is required */ | |
780 | if (info->nat && !nfct_seqadj(ct)) { | |
781 | if (!nfct_seqadj_ext_add(ct)) | |
782 | return -EINVAL; | |
783 | } | |
16ec3d4f JS |
784 | } |
785 | ||
05752523 | 786 | /* Call the helper only if: |
248d45f1 YHW |
787 | * - nf_conntrack_in() was executed above ("!cached") or a |
788 | * helper was just attached ("add_helper") for a confirmed | |
789 | * connection, or | |
05752523 JR |
790 | * - When committing an unconfirmed connection. |
791 | */ | |
248d45f1 YHW |
792 | if ((nf_ct_is_confirmed(ct) ? !cached || add_helper : |
793 | info->commit) && | |
ca71277f | 794 | nf_ct_helper(skb, ct, ctinfo, info->family) != NF_ACCEPT) { |
05752523 JR |
795 | return -EINVAL; |
796 | } | |
e2ef5203 NS |
797 | |
798 | if (nf_ct_protonum(ct) == IPPROTO_TCP && | |
799 | nf_ct_is_confirmed(ct) && nf_conntrack_tcp_established(ct)) { | |
800 | /* Be liberal for tcp packets so that out-of-window | |
801 | * packets are not marked invalid. | |
802 | */ | |
803 | nf_ct_set_tcp_be_liberal(ct); | |
804 | } | |
b702436a PB |
805 | |
806 | nf_conn_act_ct_ext_fill(skb, ct, ctinfo); | |
7f8a436e JS |
807 | } |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | /* Lookup connection and read fields into key. */ | |
813 | static int ovs_ct_lookup(struct net *net, struct sw_flow_key *key, | |
814 | const struct ovs_conntrack_info *info, | |
815 | struct sk_buff *skb) | |
816 | { | |
8c8b7332 XL |
817 | struct nf_conn *ct; |
818 | int err; | |
d913d3a7 | 819 | |
8c8b7332 XL |
820 | err = __ovs_ct_lookup(net, key, info, skb); |
821 | if (err) | |
822 | return err; | |
d913d3a7 | 823 | |
8c8b7332 XL |
824 | ct = (struct nf_conn *)skb_nfct(skb); |
825 | if (ct) | |
826 | nf_ct_deliver_cached_events(ct); | |
7f8a436e JS |
827 | |
828 | return 0; | |
829 | } | |
830 | ||
33db4125 | 831 | static bool labels_nonzero(const struct ovs_key_ct_labels *labels) |
c2ac6673 JS |
832 | { |
833 | size_t i; | |
834 | ||
cb80d58f JR |
835 | for (i = 0; i < OVS_CT_LABELS_LEN_32; i++) |
836 | if (labels->ct_labels_32[i]) | |
c2ac6673 JS |
837 | return true; |
838 | ||
839 | return false; | |
840 | } | |
841 | ||
11efd5cb YHW |
842 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
843 | static struct hlist_head *ct_limit_hash_bucket( | |
844 | const struct ovs_ct_limit_info *info, u16 zone) | |
845 | { | |
846 | return &info->limits[zone & (CT_LIMIT_HASH_BUCKETS - 1)]; | |
847 | } | |
848 | ||
849 | /* Call with ovs_mutex */ | |
850 | static void ct_limit_set(const struct ovs_ct_limit_info *info, | |
851 | struct ovs_ct_limit *new_ct_limit) | |
852 | { | |
853 | struct ovs_ct_limit *ct_limit; | |
854 | struct hlist_head *head; | |
855 | ||
856 | head = ct_limit_hash_bucket(info, new_ct_limit->zone); | |
857 | hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { | |
858 | if (ct_limit->zone == new_ct_limit->zone) { | |
859 | hlist_replace_rcu(&ct_limit->hlist_node, | |
860 | &new_ct_limit->hlist_node); | |
861 | kfree_rcu(ct_limit, rcu); | |
862 | return; | |
863 | } | |
864 | } | |
865 | ||
866 | hlist_add_head_rcu(&new_ct_limit->hlist_node, head); | |
867 | } | |
868 | ||
869 | /* Call with ovs_mutex */ | |
870 | static void ct_limit_del(const struct ovs_ct_limit_info *info, u16 zone) | |
871 | { | |
872 | struct ovs_ct_limit *ct_limit; | |
873 | struct hlist_head *head; | |
874 | struct hlist_node *n; | |
875 | ||
876 | head = ct_limit_hash_bucket(info, zone); | |
877 | hlist_for_each_entry_safe(ct_limit, n, head, hlist_node) { | |
878 | if (ct_limit->zone == zone) { | |
879 | hlist_del_rcu(&ct_limit->hlist_node); | |
880 | kfree_rcu(ct_limit, rcu); | |
881 | return; | |
882 | } | |
883 | } | |
884 | } | |
885 | ||
886 | /* Call with RCU read lock */ | |
887 | static u32 ct_limit_get(const struct ovs_ct_limit_info *info, u16 zone) | |
888 | { | |
889 | struct ovs_ct_limit *ct_limit; | |
890 | struct hlist_head *head; | |
891 | ||
892 | head = ct_limit_hash_bucket(info, zone); | |
893 | hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { | |
894 | if (ct_limit->zone == zone) | |
895 | return ct_limit->limit; | |
896 | } | |
897 | ||
898 | return info->default_limit; | |
899 | } | |
900 | ||
901 | static int ovs_ct_check_limit(struct net *net, | |
902 | const struct ovs_conntrack_info *info, | |
903 | const struct nf_conntrack_tuple *tuple) | |
904 | { | |
905 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
906 | const struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; | |
907 | u32 per_zone_limit, connections; | |
908 | u32 conncount_key; | |
909 | ||
910 | conncount_key = info->zone.id; | |
911 | ||
912 | per_zone_limit = ct_limit_get(ct_limit_info, info->zone.id); | |
913 | if (per_zone_limit == OVS_CT_LIMIT_UNLIMITED) | |
914 | return 0; | |
915 | ||
916 | connections = nf_conncount_count(net, ct_limit_info->data, | |
917 | &conncount_key, tuple, &info->zone); | |
918 | if (connections > per_zone_limit) | |
919 | return -ENOMEM; | |
920 | ||
921 | return 0; | |
922 | } | |
923 | #endif | |
924 | ||
7d904c7b JR |
925 | /* Lookup connection and confirm if unconfirmed. */ |
926 | static int ovs_ct_commit(struct net *net, struct sw_flow_key *key, | |
927 | const struct ovs_conntrack_info *info, | |
928 | struct sk_buff *skb) | |
929 | { | |
6ffcea79 JR |
930 | enum ip_conntrack_info ctinfo; |
931 | struct nf_conn *ct; | |
7d904c7b JR |
932 | int err; |
933 | ||
934 | err = __ovs_ct_lookup(net, key, info, skb); | |
935 | if (err) | |
936 | return err; | |
937 | ||
6ffcea79 JR |
938 | /* The connection could be invalid, in which case this is a no-op.*/ |
939 | ct = nf_ct_get(skb, &ctinfo); | |
940 | if (!ct) | |
941 | return 0; | |
942 | ||
11efd5cb YHW |
943 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
944 | if (static_branch_unlikely(&ovs_ct_limit_enabled)) { | |
945 | if (!nf_ct_is_confirmed(ct)) { | |
946 | err = ovs_ct_check_limit(net, info, | |
947 | &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple); | |
948 | if (err) { | |
949 | net_warn_ratelimited("openvswitch: zone: %u " | |
43d0e960 | 950 | "exceeds conntrack limit\n", |
11efd5cb YHW |
951 | info->zone.id); |
952 | return err; | |
953 | } | |
954 | } | |
955 | } | |
956 | #endif | |
957 | ||
12064551 JR |
958 | /* Set the conntrack event mask if given. NEW and DELETE events have |
959 | * their own groups, but the NFNLGRP_CONNTRACK_UPDATE group listener | |
960 | * typically would receive many kinds of updates. Setting the event | |
961 | * mask allows those events to be filtered. The set event mask will | |
962 | * remain in effect for the lifetime of the connection unless changed | |
963 | * by a further CT action with both the commit flag and the eventmask | |
964 | * option. */ | |
965 | if (info->have_eventmask) { | |
966 | struct nf_conntrack_ecache *cache = nf_ct_ecache_find(ct); | |
967 | ||
968 | if (cache) | |
969 | cache->ctmask = info->eventmask; | |
970 | } | |
971 | ||
7d904c7b JR |
972 | /* Apply changes before confirming the connection so that the initial |
973 | * conntrack NEW netlink event carries the values given in the CT | |
974 | * action. | |
975 | */ | |
976 | if (info->mark.mask) { | |
6ffcea79 | 977 | err = ovs_ct_set_mark(ct, key, info->mark.value, |
7d904c7b JR |
978 | info->mark.mask); |
979 | if (err) | |
980 | return err; | |
981 | } | |
09aa98ad JR |
982 | if (!nf_ct_is_confirmed(ct)) { |
983 | err = ovs_ct_init_labels(ct, key, &info->labels.value, | |
984 | &info->labels.mask); | |
985 | if (err) | |
986 | return err; | |
b702436a | 987 | |
9bc64bd0 | 988 | nf_conn_act_ct_ext_add(skb, ct, ctinfo); |
a277d516 AB |
989 | } else if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && |
990 | labels_nonzero(&info->labels.mask)) { | |
09aa98ad JR |
991 | err = ovs_ct_set_labels(ct, key, &info->labels.value, |
992 | &info->labels.mask); | |
7d904c7b JR |
993 | if (err) |
994 | return err; | |
995 | } | |
996 | /* This will take care of sending queued events even if the connection | |
997 | * is already confirmed. | |
998 | */ | |
999 | if (nf_conntrack_confirm(skb) != NF_ACCEPT) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
74c16618 JS |
1005 | /* Returns 0 on success, -EINPROGRESS if 'skb' is stolen, or other nonzero |
1006 | * value if 'skb' is freed. | |
1007 | */ | |
7f8a436e JS |
1008 | int ovs_ct_execute(struct net *net, struct sk_buff *skb, |
1009 | struct sw_flow_key *key, | |
1010 | const struct ovs_conntrack_info *info) | |
1011 | { | |
1012 | int nh_ofs; | |
1013 | int err; | |
1014 | ||
1015 | /* The conntrack module expects to be working at L3. */ | |
1016 | nh_ofs = skb_network_offset(skb); | |
75f01a4c | 1017 | skb_pull_rcsum(skb, nh_ofs); |
7f8a436e | 1018 | |
67fc5d7f XL |
1019 | err = nf_ct_skb_network_trim(skb, info->family); |
1020 | if (err) { | |
1021 | kfree_skb(skb); | |
9382fe71 | 1022 | return err; |
67fc5d7f | 1023 | } |
9382fe71 | 1024 | |
7f8a436e | 1025 | if (key->ip.frag != OVS_FRAG_TYPE_NONE) { |
1b83bf44 XL |
1026 | err = ovs_ct_handle_fragments(net, key, info->zone.id, |
1027 | info->family, skb); | |
7f8a436e JS |
1028 | if (err) |
1029 | return err; | |
1030 | } | |
1031 | ||
ab38a7b5 | 1032 | if (info->commit) |
7d904c7b | 1033 | err = ovs_ct_commit(net, key, info, skb); |
7f8a436e JS |
1034 | else |
1035 | err = ovs_ct_lookup(net, key, info, skb); | |
1036 | ||
7d42e84e | 1037 | skb_push_rcsum(skb, nh_ofs); |
74c16618 | 1038 | if (err) |
43d95b30 | 1039 | ovs_kfree_skb_reason(skb, OVS_DROP_CONNTRACK); |
7f8a436e JS |
1040 | return err; |
1041 | } | |
1042 | ||
b8226962 EG |
1043 | int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key) |
1044 | { | |
408bdcfc FW |
1045 | enum ip_conntrack_info ctinfo; |
1046 | struct nf_conn *ct; | |
1047 | ||
1048 | ct = nf_ct_get(skb, &ctinfo); | |
1049 | ||
1050 | nf_ct_put(ct); | |
d2792e91 | 1051 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
2061ecfd IM |
1052 | |
1053 | if (key) | |
1054 | ovs_ct_fill_key(skb, key, false); | |
b8226962 EG |
1055 | |
1056 | return 0; | |
1057 | } | |
1058 | ||
4806e975 | 1059 | #if IS_ENABLED(CONFIG_NF_NAT) |
05752523 JR |
1060 | static int parse_nat(const struct nlattr *attr, |
1061 | struct ovs_conntrack_info *info, bool log) | |
1062 | { | |
1063 | struct nlattr *a; | |
1064 | int rem; | |
1065 | bool have_ip_max = false; | |
1066 | bool have_proto_max = false; | |
1067 | bool ip_vers = (info->family == NFPROTO_IPV6); | |
1068 | ||
1069 | nla_for_each_nested(a, attr, rem) { | |
1070 | static const int ovs_nat_attr_lens[OVS_NAT_ATTR_MAX + 1][2] = { | |
1071 | [OVS_NAT_ATTR_SRC] = {0, 0}, | |
1072 | [OVS_NAT_ATTR_DST] = {0, 0}, | |
1073 | [OVS_NAT_ATTR_IP_MIN] = {sizeof(struct in_addr), | |
1074 | sizeof(struct in6_addr)}, | |
1075 | [OVS_NAT_ATTR_IP_MAX] = {sizeof(struct in_addr), | |
1076 | sizeof(struct in6_addr)}, | |
1077 | [OVS_NAT_ATTR_PROTO_MIN] = {sizeof(u16), sizeof(u16)}, | |
1078 | [OVS_NAT_ATTR_PROTO_MAX] = {sizeof(u16), sizeof(u16)}, | |
1079 | [OVS_NAT_ATTR_PERSISTENT] = {0, 0}, | |
1080 | [OVS_NAT_ATTR_PROTO_HASH] = {0, 0}, | |
1081 | [OVS_NAT_ATTR_PROTO_RANDOM] = {0, 0}, | |
1082 | }; | |
1083 | int type = nla_type(a); | |
1084 | ||
1085 | if (type > OVS_NAT_ATTR_MAX) { | |
0ed80da5 | 1086 | OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)", |
05752523 JR |
1087 | type, OVS_NAT_ATTR_MAX); |
1088 | return -EINVAL; | |
1089 | } | |
1090 | ||
1091 | if (nla_len(a) != ovs_nat_attr_lens[type][ip_vers]) { | |
0ed80da5 | 1092 | OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)", |
05752523 JR |
1093 | type, nla_len(a), |
1094 | ovs_nat_attr_lens[type][ip_vers]); | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
1098 | switch (type) { | |
1099 | case OVS_NAT_ATTR_SRC: | |
1100 | case OVS_NAT_ATTR_DST: | |
1101 | if (info->nat) { | |
0ed80da5 | 1102 | OVS_NLERR(log, "Only one type of NAT may be specified"); |
05752523 JR |
1103 | return -ERANGE; |
1104 | } | |
1105 | info->nat |= OVS_CT_NAT; | |
1106 | info->nat |= ((type == OVS_NAT_ATTR_SRC) | |
1107 | ? OVS_CT_SRC_NAT : OVS_CT_DST_NAT); | |
1108 | break; | |
1109 | ||
1110 | case OVS_NAT_ATTR_IP_MIN: | |
ac71b46e HY |
1111 | nla_memcpy(&info->range.min_addr, a, |
1112 | sizeof(info->range.min_addr)); | |
05752523 JR |
1113 | info->range.flags |= NF_NAT_RANGE_MAP_IPS; |
1114 | break; | |
1115 | ||
1116 | case OVS_NAT_ATTR_IP_MAX: | |
1117 | have_ip_max = true; | |
1118 | nla_memcpy(&info->range.max_addr, a, | |
1119 | sizeof(info->range.max_addr)); | |
1120 | info->range.flags |= NF_NAT_RANGE_MAP_IPS; | |
1121 | break; | |
1122 | ||
1123 | case OVS_NAT_ATTR_PROTO_MIN: | |
1124 | info->range.min_proto.all = htons(nla_get_u16(a)); | |
1125 | info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; | |
1126 | break; | |
1127 | ||
1128 | case OVS_NAT_ATTR_PROTO_MAX: | |
1129 | have_proto_max = true; | |
1130 | info->range.max_proto.all = htons(nla_get_u16(a)); | |
1131 | info->range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; | |
1132 | break; | |
1133 | ||
1134 | case OVS_NAT_ATTR_PERSISTENT: | |
1135 | info->range.flags |= NF_NAT_RANGE_PERSISTENT; | |
1136 | break; | |
1137 | ||
1138 | case OVS_NAT_ATTR_PROTO_HASH: | |
1139 | info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM; | |
1140 | break; | |
1141 | ||
1142 | case OVS_NAT_ATTR_PROTO_RANDOM: | |
1143 | info->range.flags |= NF_NAT_RANGE_PROTO_RANDOM_FULLY; | |
1144 | break; | |
1145 | ||
1146 | default: | |
0ed80da5 | 1147 | OVS_NLERR(log, "Unknown nat attribute (%d)", type); |
05752523 JR |
1148 | return -EINVAL; |
1149 | } | |
1150 | } | |
1151 | ||
1152 | if (rem > 0) { | |
0ed80da5 | 1153 | OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem); |
05752523 JR |
1154 | return -EINVAL; |
1155 | } | |
1156 | if (!info->nat) { | |
1157 | /* Do not allow flags if no type is given. */ | |
1158 | if (info->range.flags) { | |
1159 | OVS_NLERR(log, | |
e0b10844 | 1160 | "NAT flags may be given only when NAT range (SRC or DST) is also specified." |
05752523 JR |
1161 | ); |
1162 | return -EINVAL; | |
1163 | } | |
1164 | info->nat = OVS_CT_NAT; /* NAT existing connections. */ | |
1165 | } else if (!info->commit) { | |
1166 | OVS_NLERR(log, | |
e0b10844 | 1167 | "NAT attributes may be specified only when CT COMMIT flag is also specified." |
05752523 JR |
1168 | ); |
1169 | return -EINVAL; | |
1170 | } | |
1171 | /* Allow missing IP_MAX. */ | |
1172 | if (info->range.flags & NF_NAT_RANGE_MAP_IPS && !have_ip_max) { | |
1173 | memcpy(&info->range.max_addr, &info->range.min_addr, | |
1174 | sizeof(info->range.max_addr)); | |
1175 | } | |
1176 | /* Allow missing PROTO_MAX. */ | |
1177 | if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && | |
1178 | !have_proto_max) { | |
1179 | info->range.max_proto.all = info->range.min_proto.all; | |
1180 | } | |
1181 | return 0; | |
1182 | } | |
1183 | #endif | |
1184 | ||
7f8a436e | 1185 | static const struct ovs_ct_len_tbl ovs_ct_attr_lens[OVS_CT_ATTR_MAX + 1] = { |
ab38a7b5 | 1186 | [OVS_CT_ATTR_COMMIT] = { .minlen = 0, .maxlen = 0 }, |
dd41d33f | 1187 | [OVS_CT_ATTR_FORCE_COMMIT] = { .minlen = 0, .maxlen = 0 }, |
7f8a436e JS |
1188 | [OVS_CT_ATTR_ZONE] = { .minlen = sizeof(u16), |
1189 | .maxlen = sizeof(u16) }, | |
182e3042 JS |
1190 | [OVS_CT_ATTR_MARK] = { .minlen = sizeof(struct md_mark), |
1191 | .maxlen = sizeof(struct md_mark) }, | |
33db4125 JS |
1192 | [OVS_CT_ATTR_LABELS] = { .minlen = sizeof(struct md_labels), |
1193 | .maxlen = sizeof(struct md_labels) }, | |
cae3a262 | 1194 | [OVS_CT_ATTR_HELPER] = { .minlen = 1, |
05752523 | 1195 | .maxlen = NF_CT_HELPER_NAME_LEN }, |
4806e975 | 1196 | #if IS_ENABLED(CONFIG_NF_NAT) |
05752523 JR |
1197 | /* NAT length is checked when parsing the nested attributes. */ |
1198 | [OVS_CT_ATTR_NAT] = { .minlen = 0, .maxlen = INT_MAX }, | |
1199 | #endif | |
12064551 JR |
1200 | [OVS_CT_ATTR_EVENTMASK] = { .minlen = sizeof(u32), |
1201 | .maxlen = sizeof(u32) }, | |
06bd2bdf YHW |
1202 | [OVS_CT_ATTR_TIMEOUT] = { .minlen = 1, |
1203 | .maxlen = CTNL_TIMEOUT_NAME_MAX }, | |
7f8a436e JS |
1204 | }; |
1205 | ||
1206 | static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info, | |
cae3a262 | 1207 | const char **helper, bool log) |
7f8a436e JS |
1208 | { |
1209 | struct nlattr *a; | |
1210 | int rem; | |
1211 | ||
1212 | nla_for_each_nested(a, attr, rem) { | |
1213 | int type = nla_type(a); | |
69ec932e LZ |
1214 | int maxlen; |
1215 | int minlen; | |
7f8a436e JS |
1216 | |
1217 | if (type > OVS_CT_ATTR_MAX) { | |
1218 | OVS_NLERR(log, | |
1219 | "Unknown conntrack attr (type=%d, max=%d)", | |
1220 | type, OVS_CT_ATTR_MAX); | |
1221 | return -EINVAL; | |
1222 | } | |
69ec932e LZ |
1223 | |
1224 | maxlen = ovs_ct_attr_lens[type].maxlen; | |
1225 | minlen = ovs_ct_attr_lens[type].minlen; | |
7f8a436e JS |
1226 | if (nla_len(a) < minlen || nla_len(a) > maxlen) { |
1227 | OVS_NLERR(log, | |
1228 | "Conntrack attr type has unexpected length (type=%d, length=%d, expected=%d)", | |
1229 | type, nla_len(a), maxlen); | |
1230 | return -EINVAL; | |
1231 | } | |
1232 | ||
1233 | switch (type) { | |
dd41d33f JR |
1234 | case OVS_CT_ATTR_FORCE_COMMIT: |
1235 | info->force = true; | |
df561f66 | 1236 | fallthrough; |
ab38a7b5 JS |
1237 | case OVS_CT_ATTR_COMMIT: |
1238 | info->commit = true; | |
7f8a436e JS |
1239 | break; |
1240 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
1241 | case OVS_CT_ATTR_ZONE: | |
1242 | info->zone.id = nla_get_u16(a); | |
1243 | break; | |
182e3042 JS |
1244 | #endif |
1245 | #ifdef CONFIG_NF_CONNTRACK_MARK | |
1246 | case OVS_CT_ATTR_MARK: { | |
1247 | struct md_mark *mark = nla_data(a); | |
1248 | ||
e754ec69 JS |
1249 | if (!mark->mask) { |
1250 | OVS_NLERR(log, "ct_mark mask cannot be 0"); | |
1251 | return -EINVAL; | |
1252 | } | |
182e3042 JS |
1253 | info->mark = *mark; |
1254 | break; | |
1255 | } | |
c2ac6673 JS |
1256 | #endif |
1257 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
33db4125 JS |
1258 | case OVS_CT_ATTR_LABELS: { |
1259 | struct md_labels *labels = nla_data(a); | |
c2ac6673 | 1260 | |
e754ec69 JS |
1261 | if (!labels_nonzero(&labels->mask)) { |
1262 | OVS_NLERR(log, "ct_labels mask cannot be 0"); | |
1263 | return -EINVAL; | |
1264 | } | |
33db4125 | 1265 | info->labels = *labels; |
c2ac6673 JS |
1266 | break; |
1267 | } | |
7f8a436e | 1268 | #endif |
cae3a262 JS |
1269 | case OVS_CT_ATTR_HELPER: |
1270 | *helper = nla_data(a); | |
5c72b4c6 | 1271 | if (!string_is_terminated(*helper, nla_len(a))) { |
cae3a262 JS |
1272 | OVS_NLERR(log, "Invalid conntrack helper"); |
1273 | return -EINVAL; | |
1274 | } | |
1275 | break; | |
4806e975 | 1276 | #if IS_ENABLED(CONFIG_NF_NAT) |
05752523 JR |
1277 | case OVS_CT_ATTR_NAT: { |
1278 | int err = parse_nat(a, info, log); | |
1279 | ||
1280 | if (err) | |
1281 | return err; | |
1282 | break; | |
1283 | } | |
1284 | #endif | |
12064551 JR |
1285 | case OVS_CT_ATTR_EVENTMASK: |
1286 | info->have_eventmask = true; | |
1287 | info->eventmask = nla_get_u32(a); | |
1288 | break; | |
06bd2bdf YHW |
1289 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
1290 | case OVS_CT_ATTR_TIMEOUT: | |
1291 | memcpy(info->timeout, nla_data(a), nla_len(a)); | |
5c72b4c6 | 1292 | if (!string_is_terminated(info->timeout, nla_len(a))) { |
12c6bc38 | 1293 | OVS_NLERR(log, "Invalid conntrack timeout"); |
06bd2bdf YHW |
1294 | return -EINVAL; |
1295 | } | |
1296 | break; | |
1297 | #endif | |
12064551 | 1298 | |
7f8a436e JS |
1299 | default: |
1300 | OVS_NLERR(log, "Unknown conntrack attr (%d)", | |
1301 | type); | |
1302 | return -EINVAL; | |
1303 | } | |
1304 | } | |
1305 | ||
7d904c7b JR |
1306 | #ifdef CONFIG_NF_CONNTRACK_MARK |
1307 | if (!info->commit && info->mark.mask) { | |
1308 | OVS_NLERR(log, | |
1309 | "Setting conntrack mark requires 'commit' flag."); | |
1310 | return -EINVAL; | |
1311 | } | |
1312 | #endif | |
1313 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
1314 | if (!info->commit && labels_nonzero(&info->labels.mask)) { | |
1315 | OVS_NLERR(log, | |
1316 | "Setting conntrack labels requires 'commit' flag."); | |
1317 | return -EINVAL; | |
1318 | } | |
1319 | #endif | |
7f8a436e JS |
1320 | if (rem > 0) { |
1321 | OVS_NLERR(log, "Conntrack attr has %d unknown bytes", rem); | |
1322 | return -EINVAL; | |
1323 | } | |
1324 | ||
1325 | return 0; | |
1326 | } | |
1327 | ||
c2ac6673 | 1328 | bool ovs_ct_verify(struct net *net, enum ovs_key_attr attr) |
7f8a436e JS |
1329 | { |
1330 | if (attr == OVS_KEY_ATTR_CT_STATE) | |
1331 | return true; | |
1332 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && | |
1333 | attr == OVS_KEY_ATTR_CT_ZONE) | |
1334 | return true; | |
182e3042 JS |
1335 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && |
1336 | attr == OVS_KEY_ATTR_CT_MARK) | |
1337 | return true; | |
c2ac6673 | 1338 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && |
33db4125 | 1339 | attr == OVS_KEY_ATTR_CT_LABELS) { |
c2ac6673 JS |
1340 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
1341 | ||
1342 | return ovs_net->xt_label; | |
1343 | } | |
7f8a436e JS |
1344 | |
1345 | return false; | |
1346 | } | |
1347 | ||
1348 | int ovs_ct_copy_action(struct net *net, const struct nlattr *attr, | |
1349 | const struct sw_flow_key *key, | |
1350 | struct sw_flow_actions **sfa, bool log) | |
1351 | { | |
1352 | struct ovs_conntrack_info ct_info; | |
cae3a262 | 1353 | const char *helper = NULL; |
7f8a436e JS |
1354 | u16 family; |
1355 | int err; | |
1356 | ||
1357 | family = key_to_nfproto(key); | |
1358 | if (family == NFPROTO_UNSPEC) { | |
1359 | OVS_NLERR(log, "ct family unspecified"); | |
1360 | return -EINVAL; | |
1361 | } | |
1362 | ||
1363 | memset(&ct_info, 0, sizeof(ct_info)); | |
1364 | ct_info.family = family; | |
1365 | ||
1366 | nf_ct_zone_init(&ct_info.zone, NF_CT_DEFAULT_ZONE_ID, | |
1367 | NF_CT_DEFAULT_ZONE_DIR, 0); | |
1368 | ||
cae3a262 | 1369 | err = parse_ct(attr, &ct_info, &helper, log); |
7f8a436e JS |
1370 | if (err) |
1371 | return err; | |
1372 | ||
1373 | /* Set up template for tracking connections in specific zones. */ | |
1374 | ct_info.ct = nf_ct_tmpl_alloc(net, &ct_info.zone, GFP_KERNEL); | |
1375 | if (!ct_info.ct) { | |
1376 | OVS_NLERR(log, "Failed to allocate conntrack template"); | |
1377 | return -ENOMEM; | |
1378 | } | |
06bd2bdf YHW |
1379 | |
1380 | if (ct_info.timeout[0]) { | |
1381 | if (nf_ct_set_timeout(net, ct_info.ct, family, key->ip.proto, | |
1382 | ct_info.timeout)) | |
1383 | pr_info_ratelimited("Failed to associated timeout " | |
1384 | "policy `%s'\n", ct_info.timeout); | |
71778951 YHW |
1385 | else |
1386 | ct_info.nf_ct_timeout = rcu_dereference( | |
1387 | nf_ct_timeout_find(ct_info.ct)->timeout); | |
1388 | ||
06bd2bdf YHW |
1389 | } |
1390 | ||
cae3a262 | 1391 | if (helper) { |
f96cba2e XL |
1392 | err = nf_ct_add_helper(ct_info.ct, helper, ct_info.family, |
1393 | key->ip.proto, ct_info.nat, &ct_info.helper); | |
1394 | if (err) { | |
1395 | OVS_NLERR(log, "Failed to add %s helper %d", helper, err); | |
cae3a262 | 1396 | goto err_free_ct; |
f96cba2e | 1397 | } |
cae3a262 | 1398 | } |
7f8a436e JS |
1399 | |
1400 | err = ovs_nla_add_action(sfa, OVS_ACTION_ATTR_CT, &ct_info, | |
1401 | sizeof(ct_info), log); | |
1402 | if (err) | |
1403 | goto err_free_ct; | |
1404 | ||
8c8b7332 XL |
1405 | if (ct_info.commit) |
1406 | __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status); | |
7f8a436e JS |
1407 | return 0; |
1408 | err_free_ct: | |
2f3ab9f9 | 1409 | __ovs_ct_free_action(&ct_info); |
7f8a436e JS |
1410 | return err; |
1411 | } | |
1412 | ||
4806e975 | 1413 | #if IS_ENABLED(CONFIG_NF_NAT) |
05752523 JR |
1414 | static bool ovs_ct_nat_to_attr(const struct ovs_conntrack_info *info, |
1415 | struct sk_buff *skb) | |
1416 | { | |
1417 | struct nlattr *start; | |
1418 | ||
ae0be8de | 1419 | start = nla_nest_start_noflag(skb, OVS_CT_ATTR_NAT); |
05752523 JR |
1420 | if (!start) |
1421 | return false; | |
1422 | ||
1423 | if (info->nat & OVS_CT_SRC_NAT) { | |
1424 | if (nla_put_flag(skb, OVS_NAT_ATTR_SRC)) | |
1425 | return false; | |
1426 | } else if (info->nat & OVS_CT_DST_NAT) { | |
1427 | if (nla_put_flag(skb, OVS_NAT_ATTR_DST)) | |
1428 | return false; | |
1429 | } else { | |
1430 | goto out; | |
1431 | } | |
1432 | ||
1433 | if (info->range.flags & NF_NAT_RANGE_MAP_IPS) { | |
3bf195ae | 1434 | if (IS_ENABLED(CONFIG_NF_NAT) && |
99b7248e | 1435 | info->family == NFPROTO_IPV4) { |
05752523 JR |
1436 | if (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MIN, |
1437 | info->range.min_addr.ip) || | |
1438 | (info->range.max_addr.ip | |
1439 | != info->range.min_addr.ip && | |
1440 | (nla_put_in_addr(skb, OVS_NAT_ATTR_IP_MAX, | |
1441 | info->range.max_addr.ip)))) | |
1442 | return false; | |
3bf195ae | 1443 | } else if (IS_ENABLED(CONFIG_IPV6) && |
99b7248e | 1444 | info->family == NFPROTO_IPV6) { |
05752523 JR |
1445 | if (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MIN, |
1446 | &info->range.min_addr.in6) || | |
1447 | (memcmp(&info->range.max_addr.in6, | |
1448 | &info->range.min_addr.in6, | |
1449 | sizeof(info->range.max_addr.in6)) && | |
1450 | (nla_put_in6_addr(skb, OVS_NAT_ATTR_IP_MAX, | |
1451 | &info->range.max_addr.in6)))) | |
1452 | return false; | |
05752523 JR |
1453 | } else { |
1454 | return false; | |
1455 | } | |
1456 | } | |
1457 | if (info->range.flags & NF_NAT_RANGE_PROTO_SPECIFIED && | |
1458 | (nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MIN, | |
1459 | ntohs(info->range.min_proto.all)) || | |
1460 | (info->range.max_proto.all != info->range.min_proto.all && | |
1461 | nla_put_u16(skb, OVS_NAT_ATTR_PROTO_MAX, | |
1462 | ntohs(info->range.max_proto.all))))) | |
1463 | return false; | |
1464 | ||
1465 | if (info->range.flags & NF_NAT_RANGE_PERSISTENT && | |
1466 | nla_put_flag(skb, OVS_NAT_ATTR_PERSISTENT)) | |
1467 | return false; | |
1468 | if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM && | |
1469 | nla_put_flag(skb, OVS_NAT_ATTR_PROTO_HASH)) | |
1470 | return false; | |
1471 | if (info->range.flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY && | |
1472 | nla_put_flag(skb, OVS_NAT_ATTR_PROTO_RANDOM)) | |
1473 | return false; | |
1474 | out: | |
1475 | nla_nest_end(skb, start); | |
1476 | ||
1477 | return true; | |
1478 | } | |
1479 | #endif | |
1480 | ||
7f8a436e JS |
1481 | int ovs_ct_action_to_attr(const struct ovs_conntrack_info *ct_info, |
1482 | struct sk_buff *skb) | |
1483 | { | |
1484 | struct nlattr *start; | |
1485 | ||
ae0be8de | 1486 | start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CT); |
7f8a436e JS |
1487 | if (!start) |
1488 | return -EMSGSIZE; | |
1489 | ||
dd41d33f JR |
1490 | if (ct_info->commit && nla_put_flag(skb, ct_info->force |
1491 | ? OVS_CT_ATTR_FORCE_COMMIT | |
1492 | : OVS_CT_ATTR_COMMIT)) | |
7f8a436e JS |
1493 | return -EMSGSIZE; |
1494 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && | |
1495 | nla_put_u16(skb, OVS_CT_ATTR_ZONE, ct_info->zone.id)) | |
1496 | return -EMSGSIZE; | |
e754ec69 | 1497 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && ct_info->mark.mask && |
182e3042 JS |
1498 | nla_put(skb, OVS_CT_ATTR_MARK, sizeof(ct_info->mark), |
1499 | &ct_info->mark)) | |
1500 | return -EMSGSIZE; | |
c2ac6673 | 1501 | if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && |
e754ec69 | 1502 | labels_nonzero(&ct_info->labels.mask) && |
33db4125 JS |
1503 | nla_put(skb, OVS_CT_ATTR_LABELS, sizeof(ct_info->labels), |
1504 | &ct_info->labels)) | |
c2ac6673 | 1505 | return -EMSGSIZE; |
cae3a262 JS |
1506 | if (ct_info->helper) { |
1507 | if (nla_put_string(skb, OVS_CT_ATTR_HELPER, | |
1508 | ct_info->helper->name)) | |
1509 | return -EMSGSIZE; | |
1510 | } | |
12064551 JR |
1511 | if (ct_info->have_eventmask && |
1512 | nla_put_u32(skb, OVS_CT_ATTR_EVENTMASK, ct_info->eventmask)) | |
1513 | return -EMSGSIZE; | |
06bd2bdf YHW |
1514 | if (ct_info->timeout[0]) { |
1515 | if (nla_put_string(skb, OVS_CT_ATTR_TIMEOUT, ct_info->timeout)) | |
1516 | return -EMSGSIZE; | |
1517 | } | |
12064551 | 1518 | |
4806e975 | 1519 | #if IS_ENABLED(CONFIG_NF_NAT) |
05752523 JR |
1520 | if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb)) |
1521 | return -EMSGSIZE; | |
1522 | #endif | |
7f8a436e JS |
1523 | nla_nest_end(skb, start); |
1524 | ||
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | void ovs_ct_free_action(const struct nlattr *a) | |
1529 | { | |
1530 | struct ovs_conntrack_info *ct_info = nla_data(a); | |
1531 | ||
2f3ab9f9 JS |
1532 | __ovs_ct_free_action(ct_info); |
1533 | } | |
1534 | ||
1535 | static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info) | |
1536 | { | |
fec9c271 | 1537 | if (ct_info->helper) { |
f319ca65 | 1538 | #if IS_ENABLED(CONFIG_NF_NAT) |
fec9c271 FL |
1539 | if (ct_info->nat) |
1540 | nf_nat_helper_put(ct_info->helper); | |
1541 | #endif | |
d91fc59c | 1542 | nf_conntrack_helper_put(ct_info->helper); |
fec9c271 | 1543 | } |
06bd2bdf | 1544 | if (ct_info->ct) { |
06bd2bdf YHW |
1545 | if (ct_info->timeout[0]) |
1546 | nf_ct_destroy_timeout(ct_info->ct); | |
6d670497 | 1547 | nf_ct_tmpl_free(ct_info->ct); |
06bd2bdf | 1548 | } |
7f8a436e | 1549 | } |
c2ac6673 | 1550 | |
11efd5cb YHW |
1551 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
1552 | static int ovs_ct_limit_init(struct net *net, struct ovs_net *ovs_net) | |
1553 | { | |
1554 | int i, err; | |
1555 | ||
1556 | ovs_net->ct_limit_info = kmalloc(sizeof(*ovs_net->ct_limit_info), | |
1557 | GFP_KERNEL); | |
1558 | if (!ovs_net->ct_limit_info) | |
1559 | return -ENOMEM; | |
1560 | ||
1561 | ovs_net->ct_limit_info->default_limit = OVS_CT_LIMIT_DEFAULT; | |
1562 | ovs_net->ct_limit_info->limits = | |
1563 | kmalloc_array(CT_LIMIT_HASH_BUCKETS, sizeof(struct hlist_head), | |
1564 | GFP_KERNEL); | |
1565 | if (!ovs_net->ct_limit_info->limits) { | |
1566 | kfree(ovs_net->ct_limit_info); | |
1567 | return -ENOMEM; | |
1568 | } | |
1569 | ||
1570 | for (i = 0; i < CT_LIMIT_HASH_BUCKETS; i++) | |
1571 | INIT_HLIST_HEAD(&ovs_net->ct_limit_info->limits[i]); | |
1572 | ||
1573 | ovs_net->ct_limit_info->data = | |
1574 | nf_conncount_init(net, NFPROTO_INET, sizeof(u32)); | |
1575 | ||
1576 | if (IS_ERR(ovs_net->ct_limit_info->data)) { | |
1577 | err = PTR_ERR(ovs_net->ct_limit_info->data); | |
1578 | kfree(ovs_net->ct_limit_info->limits); | |
1579 | kfree(ovs_net->ct_limit_info); | |
1580 | pr_err("openvswitch: failed to init nf_conncount %d\n", err); | |
1581 | return err; | |
1582 | } | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | static void ovs_ct_limit_exit(struct net *net, struct ovs_net *ovs_net) | |
1587 | { | |
1588 | const struct ovs_ct_limit_info *info = ovs_net->ct_limit_info; | |
1589 | int i; | |
1590 | ||
1591 | nf_conncount_destroy(net, NFPROTO_INET, info->data); | |
1592 | for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { | |
1593 | struct hlist_head *head = &info->limits[i]; | |
1594 | struct ovs_ct_limit *ct_limit; | |
1595 | ||
27de77ce TZ |
1596 | hlist_for_each_entry_rcu(ct_limit, head, hlist_node, |
1597 | lockdep_ovsl_is_held()) | |
11efd5cb YHW |
1598 | kfree_rcu(ct_limit, rcu); |
1599 | } | |
7b066d17 ZT |
1600 | kfree(info->limits); |
1601 | kfree(info); | |
11efd5cb YHW |
1602 | } |
1603 | ||
1604 | static struct sk_buff * | |
1605 | ovs_ct_limit_cmd_reply_start(struct genl_info *info, u8 cmd, | |
1606 | struct ovs_header **ovs_reply_header) | |
1607 | { | |
bffcc688 | 1608 | struct ovs_header *ovs_header = genl_info_userhdr(info); |
11efd5cb YHW |
1609 | struct sk_buff *skb; |
1610 | ||
1611 | skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1612 | if (!skb) | |
1613 | return ERR_PTR(-ENOMEM); | |
1614 | ||
1615 | *ovs_reply_header = genlmsg_put(skb, info->snd_portid, | |
1616 | info->snd_seq, | |
1617 | &dp_ct_limit_genl_family, 0, cmd); | |
1618 | ||
1619 | if (!*ovs_reply_header) { | |
1620 | nlmsg_free(skb); | |
1621 | return ERR_PTR(-EMSGSIZE); | |
1622 | } | |
1623 | (*ovs_reply_header)->dp_ifindex = ovs_header->dp_ifindex; | |
1624 | ||
1625 | return skb; | |
1626 | } | |
1627 | ||
1628 | static bool check_zone_id(int zone_id, u16 *pzone) | |
1629 | { | |
1630 | if (zone_id >= 0 && zone_id <= 65535) { | |
1631 | *pzone = (u16)zone_id; | |
1632 | return true; | |
1633 | } | |
1634 | return false; | |
1635 | } | |
1636 | ||
1637 | static int ovs_ct_limit_set_zone_limit(struct nlattr *nla_zone_limit, | |
1638 | struct ovs_ct_limit_info *info) | |
1639 | { | |
1640 | struct ovs_zone_limit *zone_limit; | |
1641 | int rem; | |
1642 | u16 zone; | |
1643 | ||
1644 | rem = NLA_ALIGN(nla_len(nla_zone_limit)); | |
1645 | zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); | |
1646 | ||
1647 | while (rem >= sizeof(*zone_limit)) { | |
1648 | if (unlikely(zone_limit->zone_id == | |
1649 | OVS_ZONE_LIMIT_DEFAULT_ZONE)) { | |
1650 | ovs_lock(); | |
1651 | info->default_limit = zone_limit->limit; | |
1652 | ovs_unlock(); | |
1653 | } else if (unlikely(!check_zone_id( | |
1654 | zone_limit->zone_id, &zone))) { | |
1655 | OVS_NLERR(true, "zone id is out of range"); | |
1656 | } else { | |
1657 | struct ovs_ct_limit *ct_limit; | |
1658 | ||
59cd7377 MW |
1659 | ct_limit = kmalloc(sizeof(*ct_limit), |
1660 | GFP_KERNEL_ACCOUNT); | |
11efd5cb YHW |
1661 | if (!ct_limit) |
1662 | return -ENOMEM; | |
1663 | ||
1664 | ct_limit->zone = zone; | |
1665 | ct_limit->limit = zone_limit->limit; | |
1666 | ||
1667 | ovs_lock(); | |
1668 | ct_limit_set(info, ct_limit); | |
1669 | ovs_unlock(); | |
1670 | } | |
1671 | rem -= NLA_ALIGN(sizeof(*zone_limit)); | |
1672 | zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + | |
1673 | NLA_ALIGN(sizeof(*zone_limit))); | |
1674 | } | |
1675 | ||
1676 | if (rem) | |
1677 | OVS_NLERR(true, "set zone limit has %d unknown bytes", rem); | |
1678 | ||
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | static int ovs_ct_limit_del_zone_limit(struct nlattr *nla_zone_limit, | |
1683 | struct ovs_ct_limit_info *info) | |
1684 | { | |
1685 | struct ovs_zone_limit *zone_limit; | |
1686 | int rem; | |
1687 | u16 zone; | |
1688 | ||
1689 | rem = NLA_ALIGN(nla_len(nla_zone_limit)); | |
1690 | zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); | |
1691 | ||
1692 | while (rem >= sizeof(*zone_limit)) { | |
1693 | if (unlikely(zone_limit->zone_id == | |
1694 | OVS_ZONE_LIMIT_DEFAULT_ZONE)) { | |
1695 | ovs_lock(); | |
1696 | info->default_limit = OVS_CT_LIMIT_DEFAULT; | |
1697 | ovs_unlock(); | |
1698 | } else if (unlikely(!check_zone_id( | |
1699 | zone_limit->zone_id, &zone))) { | |
1700 | OVS_NLERR(true, "zone id is out of range"); | |
1701 | } else { | |
1702 | ovs_lock(); | |
1703 | ct_limit_del(info, zone); | |
1704 | ovs_unlock(); | |
1705 | } | |
1706 | rem -= NLA_ALIGN(sizeof(*zone_limit)); | |
1707 | zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + | |
1708 | NLA_ALIGN(sizeof(*zone_limit))); | |
1709 | } | |
1710 | ||
1711 | if (rem) | |
1712 | OVS_NLERR(true, "del zone limit has %d unknown bytes", rem); | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static int ovs_ct_limit_get_default_limit(struct ovs_ct_limit_info *info, | |
1718 | struct sk_buff *reply) | |
1719 | { | |
4d51419d IM |
1720 | struct ovs_zone_limit zone_limit = { |
1721 | .zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE, | |
1722 | .limit = info->default_limit, | |
1723 | }; | |
11efd5cb | 1724 | |
5e359044 | 1725 | return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); |
11efd5cb YHW |
1726 | } |
1727 | ||
1728 | static int __ovs_ct_limit_get_zone_limit(struct net *net, | |
1729 | struct nf_conncount_data *data, | |
1730 | u16 zone_id, u32 limit, | |
1731 | struct sk_buff *reply) | |
1732 | { | |
1733 | struct nf_conntrack_zone ct_zone; | |
1734 | struct ovs_zone_limit zone_limit; | |
1735 | u32 conncount_key = zone_id; | |
1736 | ||
1737 | zone_limit.zone_id = zone_id; | |
1738 | zone_limit.limit = limit; | |
1739 | nf_ct_zone_init(&ct_zone, zone_id, NF_CT_DEFAULT_ZONE_DIR, 0); | |
1740 | ||
1741 | zone_limit.count = nf_conncount_count(net, data, &conncount_key, NULL, | |
1742 | &ct_zone); | |
1743 | return nla_put_nohdr(reply, sizeof(zone_limit), &zone_limit); | |
1744 | } | |
1745 | ||
1746 | static int ovs_ct_limit_get_zone_limit(struct net *net, | |
1747 | struct nlattr *nla_zone_limit, | |
1748 | struct ovs_ct_limit_info *info, | |
1749 | struct sk_buff *reply) | |
1750 | { | |
1751 | struct ovs_zone_limit *zone_limit; | |
1752 | int rem, err; | |
1753 | u32 limit; | |
1754 | u16 zone; | |
1755 | ||
1756 | rem = NLA_ALIGN(nla_len(nla_zone_limit)); | |
1757 | zone_limit = (struct ovs_zone_limit *)nla_data(nla_zone_limit); | |
1758 | ||
1759 | while (rem >= sizeof(*zone_limit)) { | |
1760 | if (unlikely(zone_limit->zone_id == | |
1761 | OVS_ZONE_LIMIT_DEFAULT_ZONE)) { | |
1762 | err = ovs_ct_limit_get_default_limit(info, reply); | |
1763 | if (err) | |
1764 | return err; | |
1765 | } else if (unlikely(!check_zone_id(zone_limit->zone_id, | |
1766 | &zone))) { | |
1767 | OVS_NLERR(true, "zone id is out of range"); | |
1768 | } else { | |
1769 | rcu_read_lock(); | |
1770 | limit = ct_limit_get(info, zone); | |
1771 | rcu_read_unlock(); | |
1772 | ||
1773 | err = __ovs_ct_limit_get_zone_limit( | |
1774 | net, info->data, zone, limit, reply); | |
1775 | if (err) | |
1776 | return err; | |
1777 | } | |
1778 | rem -= NLA_ALIGN(sizeof(*zone_limit)); | |
1779 | zone_limit = (struct ovs_zone_limit *)((u8 *)zone_limit + | |
1780 | NLA_ALIGN(sizeof(*zone_limit))); | |
1781 | } | |
1782 | ||
1783 | if (rem) | |
1784 | OVS_NLERR(true, "get zone limit has %d unknown bytes", rem); | |
1785 | ||
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static int ovs_ct_limit_get_all_zone_limit(struct net *net, | |
1790 | struct ovs_ct_limit_info *info, | |
1791 | struct sk_buff *reply) | |
1792 | { | |
1793 | struct ovs_ct_limit *ct_limit; | |
1794 | struct hlist_head *head; | |
1795 | int i, err = 0; | |
1796 | ||
1797 | err = ovs_ct_limit_get_default_limit(info, reply); | |
1798 | if (err) | |
1799 | return err; | |
1800 | ||
1801 | rcu_read_lock(); | |
1802 | for (i = 0; i < CT_LIMIT_HASH_BUCKETS; ++i) { | |
1803 | head = &info->limits[i]; | |
1804 | hlist_for_each_entry_rcu(ct_limit, head, hlist_node) { | |
1805 | err = __ovs_ct_limit_get_zone_limit(net, info->data, | |
1806 | ct_limit->zone, ct_limit->limit, reply); | |
1807 | if (err) | |
1808 | goto exit_err; | |
1809 | } | |
1810 | } | |
1811 | ||
1812 | exit_err: | |
1813 | rcu_read_unlock(); | |
1814 | return err; | |
1815 | } | |
1816 | ||
1817 | static int ovs_ct_limit_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1818 | { | |
1819 | struct nlattr **a = info->attrs; | |
1820 | struct sk_buff *reply; | |
1821 | struct ovs_header *ovs_reply_header; | |
1822 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); | |
1823 | struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; | |
1824 | int err; | |
1825 | ||
1826 | reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_SET, | |
1827 | &ovs_reply_header); | |
1828 | if (IS_ERR(reply)) | |
1829 | return PTR_ERR(reply); | |
1830 | ||
1831 | if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { | |
1832 | err = -EINVAL; | |
1833 | goto exit_err; | |
1834 | } | |
1835 | ||
1836 | err = ovs_ct_limit_set_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], | |
1837 | ct_limit_info); | |
1838 | if (err) | |
1839 | goto exit_err; | |
1840 | ||
1841 | static_branch_enable(&ovs_ct_limit_enabled); | |
1842 | ||
1843 | genlmsg_end(reply, ovs_reply_header); | |
1844 | return genlmsg_reply(reply, info); | |
1845 | ||
1846 | exit_err: | |
1847 | nlmsg_free(reply); | |
1848 | return err; | |
1849 | } | |
1850 | ||
1851 | static int ovs_ct_limit_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1852 | { | |
1853 | struct nlattr **a = info->attrs; | |
1854 | struct sk_buff *reply; | |
1855 | struct ovs_header *ovs_reply_header; | |
1856 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); | |
1857 | struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; | |
1858 | int err; | |
1859 | ||
1860 | reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_DEL, | |
1861 | &ovs_reply_header); | |
1862 | if (IS_ERR(reply)) | |
1863 | return PTR_ERR(reply); | |
1864 | ||
1865 | if (!a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { | |
1866 | err = -EINVAL; | |
1867 | goto exit_err; | |
1868 | } | |
1869 | ||
1870 | err = ovs_ct_limit_del_zone_limit(a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], | |
1871 | ct_limit_info); | |
1872 | if (err) | |
1873 | goto exit_err; | |
1874 | ||
1875 | genlmsg_end(reply, ovs_reply_header); | |
1876 | return genlmsg_reply(reply, info); | |
1877 | ||
1878 | exit_err: | |
1879 | nlmsg_free(reply); | |
1880 | return err; | |
1881 | } | |
1882 | ||
1883 | static int ovs_ct_limit_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1884 | { | |
1885 | struct nlattr **a = info->attrs; | |
1886 | struct nlattr *nla_reply; | |
1887 | struct sk_buff *reply; | |
1888 | struct ovs_header *ovs_reply_header; | |
1889 | struct net *net = sock_net(skb->sk); | |
1890 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
1891 | struct ovs_ct_limit_info *ct_limit_info = ovs_net->ct_limit_info; | |
1892 | int err; | |
1893 | ||
1894 | reply = ovs_ct_limit_cmd_reply_start(info, OVS_CT_LIMIT_CMD_GET, | |
1895 | &ovs_reply_header); | |
1896 | if (IS_ERR(reply)) | |
1897 | return PTR_ERR(reply); | |
1898 | ||
ae0be8de | 1899 | nla_reply = nla_nest_start_noflag(reply, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); |
ca965346 CIK |
1900 | if (!nla_reply) { |
1901 | err = -EMSGSIZE; | |
1902 | goto exit_err; | |
1903 | } | |
11efd5cb YHW |
1904 | |
1905 | if (a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { | |
1906 | err = ovs_ct_limit_get_zone_limit( | |
1907 | net, a[OVS_CT_LIMIT_ATTR_ZONE_LIMIT], ct_limit_info, | |
1908 | reply); | |
1909 | if (err) | |
1910 | goto exit_err; | |
1911 | } else { | |
1912 | err = ovs_ct_limit_get_all_zone_limit(net, ct_limit_info, | |
1913 | reply); | |
1914 | if (err) | |
1915 | goto exit_err; | |
1916 | } | |
1917 | ||
1918 | nla_nest_end(reply, nla_reply); | |
1919 | genlmsg_end(reply, ovs_reply_header); | |
1920 | return genlmsg_reply(reply, info); | |
1921 | ||
1922 | exit_err: | |
1923 | nlmsg_free(reply); | |
1924 | return err; | |
1925 | } | |
1926 | ||
b980b313 | 1927 | static const struct genl_small_ops ct_limit_genl_ops[] = { |
11efd5cb | 1928 | { .cmd = OVS_CT_LIMIT_CMD_SET, |
ef6243ac | 1929 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
59cd7377 MW |
1930 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN |
1931 | * privilege. | |
1932 | */ | |
11efd5cb YHW |
1933 | .doit = ovs_ct_limit_cmd_set, |
1934 | }, | |
1935 | { .cmd = OVS_CT_LIMIT_CMD_DEL, | |
ef6243ac | 1936 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
59cd7377 MW |
1937 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN |
1938 | * privilege. | |
1939 | */ | |
11efd5cb YHW |
1940 | .doit = ovs_ct_limit_cmd_del, |
1941 | }, | |
1942 | { .cmd = OVS_CT_LIMIT_CMD_GET, | |
ef6243ac | 1943 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
11efd5cb | 1944 | .flags = 0, /* OK for unprivileged users. */ |
11efd5cb YHW |
1945 | .doit = ovs_ct_limit_cmd_get, |
1946 | }, | |
1947 | }; | |
1948 | ||
1949 | static const struct genl_multicast_group ovs_ct_limit_multicast_group = { | |
1950 | .name = OVS_CT_LIMIT_MCGROUP, | |
1951 | }; | |
1952 | ||
1953 | struct genl_family dp_ct_limit_genl_family __ro_after_init = { | |
1954 | .hdrsize = sizeof(struct ovs_header), | |
1955 | .name = OVS_CT_LIMIT_FAMILY, | |
1956 | .version = OVS_CT_LIMIT_VERSION, | |
1957 | .maxattr = OVS_CT_LIMIT_ATTR_MAX, | |
3b0f31f2 | 1958 | .policy = ct_limit_policy, |
11efd5cb YHW |
1959 | .netnsok = true, |
1960 | .parallel_ops = true, | |
66a9b928 JK |
1961 | .small_ops = ct_limit_genl_ops, |
1962 | .n_small_ops = ARRAY_SIZE(ct_limit_genl_ops), | |
9c5d03d3 | 1963 | .resv_start_op = OVS_CT_LIMIT_CMD_GET + 1, |
11efd5cb YHW |
1964 | .mcgrps = &ovs_ct_limit_multicast_group, |
1965 | .n_mcgrps = 1, | |
1966 | .module = THIS_MODULE, | |
1967 | }; | |
1968 | #endif | |
1969 | ||
1970 | int ovs_ct_init(struct net *net) | |
c2ac6673 | 1971 | { |
33db4125 | 1972 | unsigned int n_bits = sizeof(struct ovs_key_ct_labels) * BITS_PER_BYTE; |
c2ac6673 JS |
1973 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
1974 | ||
adff6c65 | 1975 | if (nf_connlabels_get(net, n_bits - 1)) { |
c2ac6673 JS |
1976 | ovs_net->xt_label = false; |
1977 | OVS_NLERR(true, "Failed to set connlabel length"); | |
1978 | } else { | |
1979 | ovs_net->xt_label = true; | |
1980 | } | |
11efd5cb YHW |
1981 | |
1982 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) | |
1983 | return ovs_ct_limit_init(net, ovs_net); | |
1984 | #else | |
1985 | return 0; | |
1986 | #endif | |
c2ac6673 JS |
1987 | } |
1988 | ||
1989 | void ovs_ct_exit(struct net *net) | |
1990 | { | |
1991 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
1992 | ||
11efd5cb YHW |
1993 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
1994 | ovs_ct_limit_exit(net, ovs_net); | |
1995 | #endif | |
1996 | ||
c2ac6673 JS |
1997 | if (ovs_net->xt_label) |
1998 | nf_connlabels_put(net); | |
1999 | } |