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e6445719 | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
e6445719 PS |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
2235ad1c JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
e6445719 PS |
21 | #include "flow.h" |
22 | #include "datapath.h" | |
23 | #include <linux/uaccess.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
28 | #include <net/llc_pdu.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/jhash.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/llc.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/in.h> | |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/ip.h> | |
38 | #include <linux/ipv6.h> | |
39 | #include <linux/sctp.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/udp.h> | |
42 | #include <linux/icmp.h> | |
43 | #include <linux/icmpv6.h> | |
44 | #include <linux/rculist.h> | |
f5796684 | 45 | #include <net/geneve.h> |
e6445719 PS |
46 | #include <net/ip.h> |
47 | #include <net/ipv6.h> | |
48 | #include <net/ndisc.h> | |
49 | ||
50 | #include "flow_netlink.h" | |
51 | ||
52 | static void update_range__(struct sw_flow_match *match, | |
53 | size_t offset, size_t size, bool is_mask) | |
54 | { | |
55 | struct sw_flow_key_range *range = NULL; | |
56 | size_t start = rounddown(offset, sizeof(long)); | |
57 | size_t end = roundup(offset + size, sizeof(long)); | |
58 | ||
59 | if (!is_mask) | |
60 | range = &match->range; | |
61 | else if (match->mask) | |
62 | range = &match->mask->range; | |
63 | ||
64 | if (!range) | |
65 | return; | |
66 | ||
67 | if (range->start == range->end) { | |
68 | range->start = start; | |
69 | range->end = end; | |
70 | return; | |
71 | } | |
72 | ||
73 | if (range->start > start) | |
74 | range->start = start; | |
75 | ||
76 | if (range->end < end) | |
77 | range->end = end; | |
78 | } | |
79 | ||
80 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
81 | do { \ | |
82 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
83 | sizeof((match)->key->field), is_mask); \ | |
84 | if (is_mask) { \ | |
85 | if ((match)->mask) \ | |
86 | (match)->mask->key.field = value; \ | |
87 | } else { \ | |
88 | (match)->key->field = value; \ | |
89 | } \ | |
90 | } while (0) | |
91 | ||
f5796684 JG |
92 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
93 | do { \ | |
94 | update_range__(match, offset, len, is_mask); \ | |
95 | if (is_mask) \ | |
96 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
97 | len); \ | |
98 | else \ | |
99 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
e6445719 PS |
100 | } while (0) |
101 | ||
f5796684 JG |
102 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
103 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
104 | value_p, len, is_mask) | |
105 | ||
e6445719 PS |
106 | static u16 range_n_bytes(const struct sw_flow_key_range *range) |
107 | { | |
108 | return range->end - range->start; | |
109 | } | |
110 | ||
111 | static bool match_validate(const struct sw_flow_match *match, | |
112 | u64 key_attrs, u64 mask_attrs) | |
113 | { | |
114 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
115 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
116 | ||
117 | /* The following mask attributes allowed only if they | |
118 | * pass the validation tests. */ | |
119 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
120 | | (1 << OVS_KEY_ATTR_IPV6) | |
121 | | (1 << OVS_KEY_ATTR_TCP) | |
5eb26b15 | 122 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
e6445719 PS |
123 | | (1 << OVS_KEY_ATTR_UDP) |
124 | | (1 << OVS_KEY_ATTR_SCTP) | |
125 | | (1 << OVS_KEY_ATTR_ICMP) | |
126 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
127 | | (1 << OVS_KEY_ATTR_ARP) | |
128 | | (1 << OVS_KEY_ATTR_ND)); | |
129 | ||
130 | /* Always allowed mask fields. */ | |
131 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
132 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
133 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
134 | ||
135 | /* Check key attributes. */ | |
136 | if (match->key->eth.type == htons(ETH_P_ARP) | |
137 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
138 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
139 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
140 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; | |
141 | } | |
142 | ||
143 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
144 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
145 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
146 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
147 | ||
148 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
149 | if (match->key->ip.proto == IPPROTO_UDP) { | |
150 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
151 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
152 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
153 | } | |
154 | ||
155 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
156 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
157 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
158 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
159 | } | |
160 | ||
161 | if (match->key->ip.proto == IPPROTO_TCP) { | |
162 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
163 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
164 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 165 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
166 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
167 | } | |
e6445719 PS |
168 | } |
169 | ||
170 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
171 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
172 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
173 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
179 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
180 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
181 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
182 | ||
183 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
184 | if (match->key->ip.proto == IPPROTO_UDP) { | |
185 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
186 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
187 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
188 | } | |
189 | ||
190 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
191 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
192 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
193 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
194 | } | |
195 | ||
196 | if (match->key->ip.proto == IPPROTO_TCP) { | |
197 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
198 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
199 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 200 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
201 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
202 | } | |
e6445719 PS |
203 | } |
204 | ||
205 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
206 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
207 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
208 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
209 | ||
1139e241 | 210 | if (match->key->tp.src == |
e6445719 | 211 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
1139e241 | 212 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
e6445719 | 213 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
1139e241 | 214 | if (match->mask && (match->mask->key.tp.src == htons(0xffff))) |
e6445719 PS |
215 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
216 | } | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | if ((key_attrs & key_expected) != key_expected) { | |
222 | /* Key attributes check failed. */ | |
223 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", | |
cc23ebf3 | 224 | (unsigned long long)key_attrs, (unsigned long long)key_expected); |
e6445719 PS |
225 | return false; |
226 | } | |
227 | ||
228 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
229 | /* Mask attributes check failed. */ | |
230 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", | |
cc23ebf3 | 231 | (unsigned long long)mask_attrs, (unsigned long long)mask_allowed); |
e6445719 PS |
232 | return false; |
233 | } | |
234 | ||
235 | return true; | |
236 | } | |
237 | ||
238 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ | |
239 | static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { | |
240 | [OVS_KEY_ATTR_ENCAP] = -1, | |
241 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), | |
242 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
243 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), | |
244 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), | |
245 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), | |
246 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), | |
247 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), | |
248 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
249 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
5eb26b15 | 250 | [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16), |
e6445719 PS |
251 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), |
252 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), | |
253 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
254 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
255 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
256 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
971427f3 AZ |
257 | [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32), |
258 | [OVS_KEY_ATTR_DP_HASH] = sizeof(u32), | |
e6445719 PS |
259 | [OVS_KEY_ATTR_TUNNEL] = -1, |
260 | }; | |
261 | ||
262 | static bool is_all_zero(const u8 *fp, size_t size) | |
263 | { | |
264 | int i; | |
265 | ||
266 | if (!fp) | |
267 | return false; | |
268 | ||
269 | for (i = 0; i < size; i++) | |
270 | if (fp[i]) | |
271 | return false; | |
272 | ||
273 | return true; | |
274 | } | |
275 | ||
276 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
277 | const struct nlattr *a[], | |
278 | u64 *attrsp, bool nz) | |
279 | { | |
280 | const struct nlattr *nla; | |
281 | u64 attrs; | |
282 | int rem; | |
283 | ||
284 | attrs = *attrsp; | |
285 | nla_for_each_nested(nla, attr, rem) { | |
286 | u16 type = nla_type(nla); | |
287 | int expected_len; | |
288 | ||
289 | if (type > OVS_KEY_ATTR_MAX) { | |
290 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", | |
291 | type, OVS_KEY_ATTR_MAX); | |
292 | return -EINVAL; | |
293 | } | |
294 | ||
295 | if (attrs & (1 << type)) { | |
296 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | expected_len = ovs_key_lens[type]; | |
301 | if (nla_len(nla) != expected_len && expected_len != -1) { | |
302 | OVS_NLERR("Key attribute has unexpected length (type=%d" | |
303 | ", length=%d, expected=%d).\n", type, | |
304 | nla_len(nla), expected_len); | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
308 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
309 | attrs |= 1 << type; | |
310 | a[type] = nla; | |
311 | } | |
312 | } | |
313 | if (rem) { | |
314 | OVS_NLERR("Message has %d unknown bytes.\n", rem); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
318 | *attrsp = attrs; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
323 | const struct nlattr *a[], u64 *attrsp) | |
324 | { | |
325 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
326 | } | |
327 | ||
328 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
329 | const struct nlattr *a[], u64 *attrsp) | |
330 | { | |
331 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
332 | } | |
333 | ||
334 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, | |
335 | struct sw_flow_match *match, bool is_mask) | |
336 | { | |
337 | struct nlattr *a; | |
338 | int rem; | |
339 | bool ttl = false; | |
340 | __be16 tun_flags = 0; | |
f5796684 | 341 | unsigned long opt_key_offset; |
e6445719 PS |
342 | |
343 | nla_for_each_nested(a, attr, rem) { | |
344 | int type = nla_type(a); | |
345 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
346 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
347 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
348 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
349 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
350 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
351 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
352 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
67fa0341 | 353 | [OVS_TUNNEL_KEY_ATTR_OAM] = 0, |
f5796684 | 354 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1, |
e6445719 PS |
355 | }; |
356 | ||
357 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { | |
358 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", | |
359 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
360 | return -EINVAL; | |
361 | } | |
362 | ||
f5796684 JG |
363 | if (ovs_tunnel_key_lens[type] != nla_len(a) && |
364 | ovs_tunnel_key_lens[type] != -1) { | |
e6445719 PS |
365 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " |
366 | " length (type=%d, length=%d, expected=%d).\n", | |
367 | type, nla_len(a), ovs_tunnel_key_lens[type]); | |
368 | return -EINVAL; | |
369 | } | |
370 | ||
371 | switch (type) { | |
372 | case OVS_TUNNEL_KEY_ATTR_ID: | |
373 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
374 | nla_get_be64(a), is_mask); | |
375 | tun_flags |= TUNNEL_KEY; | |
376 | break; | |
377 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
378 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, | |
379 | nla_get_be32(a), is_mask); | |
380 | break; | |
381 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
382 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, | |
383 | nla_get_be32(a), is_mask); | |
384 | break; | |
385 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
386 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, | |
387 | nla_get_u8(a), is_mask); | |
388 | break; | |
389 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
390 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, | |
391 | nla_get_u8(a), is_mask); | |
392 | ttl = true; | |
393 | break; | |
394 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
395 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
396 | break; | |
397 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
398 | tun_flags |= TUNNEL_CSUM; | |
399 | break; | |
67fa0341 JG |
400 | case OVS_TUNNEL_KEY_ATTR_OAM: |
401 | tun_flags |= TUNNEL_OAM; | |
402 | break; | |
f5796684 JG |
403 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
404 | tun_flags |= TUNNEL_OPTIONS_PRESENT; | |
405 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
406 | OVS_NLERR("Geneve option length exceeds maximum size (len %d, max %zu).\n", | |
407 | nla_len(a), | |
408 | sizeof(match->key->tun_opts)); | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | if (nla_len(a) % 4 != 0) { | |
413 | OVS_NLERR("Geneve option length is not a multiple of 4 (len %d).\n", | |
414 | nla_len(a)); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | /* We need to record the length of the options passed | |
419 | * down, otherwise packets with the same format but | |
420 | * additional options will be silently matched. | |
421 | */ | |
422 | if (!is_mask) { | |
423 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
424 | false); | |
425 | } else { | |
426 | /* This is somewhat unusual because it looks at | |
427 | * both the key and mask while parsing the | |
428 | * attributes (and by extension assumes the key | |
429 | * is parsed first). Normally, we would verify | |
430 | * that each is the correct length and that the | |
431 | * attributes line up in the validate function. | |
432 | * However, that is difficult because this is | |
433 | * variable length and we won't have the | |
434 | * information later. | |
435 | */ | |
436 | if (match->key->tun_opts_len != nla_len(a)) { | |
437 | OVS_NLERR("Geneve option key length (%d) is different from mask length (%d).", | |
438 | match->key->tun_opts_len, | |
439 | nla_len(a)); | |
440 | return -EINVAL; | |
441 | } | |
442 | ||
443 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, | |
444 | true); | |
445 | } | |
446 | ||
447 | opt_key_offset = (unsigned long)GENEVE_OPTS( | |
448 | (struct sw_flow_key *)0, | |
449 | nla_len(a)); | |
450 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, | |
451 | nla_data(a), nla_len(a), | |
452 | is_mask); | |
453 | break; | |
e6445719 | 454 | default: |
f5796684 JG |
455 | OVS_NLERR("Unknown IPv4 tunnel attribute (%d).\n", |
456 | type); | |
e6445719 PS |
457 | return -EINVAL; |
458 | } | |
459 | } | |
460 | ||
461 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
462 | ||
463 | if (rem > 0) { | |
464 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); | |
465 | return -EINVAL; | |
466 | } | |
467 | ||
468 | if (!is_mask) { | |
469 | if (!match->key->tun_key.ipv4_dst) { | |
470 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); | |
471 | return -EINVAL; | |
472 | } | |
473 | ||
474 | if (!ttl) { | |
475 | OVS_NLERR("IPv4 tunnel TTL not specified.\n"); | |
476 | return -EINVAL; | |
477 | } | |
478 | } | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
f5796684 JG |
483 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
484 | const struct ovs_key_ipv4_tunnel *output, | |
485 | const struct geneve_opt *tun_opts, | |
486 | int swkey_tun_opts_len) | |
e6445719 | 487 | { |
e6445719 PS |
488 | if (output->tun_flags & TUNNEL_KEY && |
489 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
490 | return -EMSGSIZE; | |
491 | if (output->ipv4_src && | |
67fa0341 | 492 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) |
e6445719 PS |
493 | return -EMSGSIZE; |
494 | if (output->ipv4_dst && | |
67fa0341 | 495 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) |
e6445719 PS |
496 | return -EMSGSIZE; |
497 | if (output->ipv4_tos && | |
67fa0341 | 498 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
e6445719 PS |
499 | return -EMSGSIZE; |
500 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) | |
501 | return -EMSGSIZE; | |
502 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
67fa0341 | 503 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
e6445719 PS |
504 | return -EMSGSIZE; |
505 | if ((output->tun_flags & TUNNEL_CSUM) && | |
67fa0341 JG |
506 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
507 | return -EMSGSIZE; | |
508 | if ((output->tun_flags & TUNNEL_OAM) && | |
509 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
e6445719 | 510 | return -EMSGSIZE; |
f5796684 JG |
511 | if (tun_opts && |
512 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
513 | swkey_tun_opts_len, tun_opts)) | |
514 | return -EMSGSIZE; | |
e6445719 | 515 | |
e6445719 PS |
516 | return 0; |
517 | } | |
518 | ||
519 | ||
f5796684 JG |
520 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
521 | const struct ovs_key_ipv4_tunnel *output, | |
522 | const struct geneve_opt *tun_opts, | |
523 | int swkey_tun_opts_len) | |
524 | { | |
525 | struct nlattr *nla; | |
526 | int err; | |
527 | ||
528 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
529 | if (!nla) | |
530 | return -EMSGSIZE; | |
531 | ||
532 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); | |
533 | if (err) | |
534 | return err; | |
535 | ||
536 | nla_nest_end(skb, nla); | |
537 | return 0; | |
538 | } | |
539 | ||
e6445719 PS |
540 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
541 | const struct nlattr **a, bool is_mask) | |
542 | { | |
971427f3 AZ |
543 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
544 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
545 | ||
546 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
547 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
548 | } | |
549 | ||
550 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
551 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
552 | ||
553 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
554 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
555 | } | |
556 | ||
e6445719 PS |
557 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
558 | SW_FLOW_KEY_PUT(match, phy.priority, | |
559 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
560 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
561 | } | |
562 | ||
563 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
564 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
565 | ||
566 | if (is_mask) | |
567 | in_port = 0xffffffff; /* Always exact match in_port. */ | |
568 | else if (in_port >= DP_MAX_PORTS) | |
569 | return -EINVAL; | |
570 | ||
571 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
572 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
573 | } else if (!is_mask) { | |
574 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
575 | } | |
576 | ||
577 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
578 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
579 | ||
580 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
581 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
582 | } | |
583 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
584 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
585 | is_mask)) | |
586 | return -EINVAL; | |
587 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
588 | } | |
589 | return 0; | |
590 | } | |
591 | ||
23dabf88 JR |
592 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
593 | const struct nlattr **a, bool is_mask) | |
e6445719 PS |
594 | { |
595 | int err; | |
596 | u64 orig_attrs = attrs; | |
597 | ||
598 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); | |
599 | if (err) | |
600 | return err; | |
601 | ||
602 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
603 | const struct ovs_key_ethernet *eth_key; | |
604 | ||
605 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
606 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
607 | eth_key->eth_src, ETH_ALEN, is_mask); | |
608 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
609 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
610 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
611 | } | |
612 | ||
613 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
614 | __be16 tci; | |
615 | ||
616 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
617 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
618 | if (is_mask) | |
619 | OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); | |
620 | else | |
621 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); | |
622 | ||
623 | return -EINVAL; | |
624 | } | |
625 | ||
626 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
627 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
628 | } else if (!is_mask) | |
629 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
630 | ||
631 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
632 | __be16 eth_type; | |
633 | ||
634 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
635 | if (is_mask) { | |
636 | /* Always exact match EtherType. */ | |
637 | eth_type = htons(0xffff); | |
638 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
639 | OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", | |
640 | ntohs(eth_type), ETH_P_802_3_MIN); | |
641 | return -EINVAL; | |
642 | } | |
643 | ||
644 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
645 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
646 | } else if (!is_mask) { | |
647 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
648 | } | |
649 | ||
650 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
651 | const struct ovs_key_ipv4 *ipv4_key; | |
652 | ||
653 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
654 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
655 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", | |
656 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
657 | return -EINVAL; | |
658 | } | |
659 | SW_FLOW_KEY_PUT(match, ip.proto, | |
660 | ipv4_key->ipv4_proto, is_mask); | |
661 | SW_FLOW_KEY_PUT(match, ip.tos, | |
662 | ipv4_key->ipv4_tos, is_mask); | |
663 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
664 | ipv4_key->ipv4_ttl, is_mask); | |
665 | SW_FLOW_KEY_PUT(match, ip.frag, | |
666 | ipv4_key->ipv4_frag, is_mask); | |
667 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
668 | ipv4_key->ipv4_src, is_mask); | |
669 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
670 | ipv4_key->ipv4_dst, is_mask); | |
671 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
672 | } | |
673 | ||
674 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
675 | const struct ovs_key_ipv6 *ipv6_key; | |
676 | ||
677 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
678 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
679 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", | |
680 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
681 | return -EINVAL; | |
682 | } | |
683 | SW_FLOW_KEY_PUT(match, ipv6.label, | |
684 | ipv6_key->ipv6_label, is_mask); | |
685 | SW_FLOW_KEY_PUT(match, ip.proto, | |
686 | ipv6_key->ipv6_proto, is_mask); | |
687 | SW_FLOW_KEY_PUT(match, ip.tos, | |
688 | ipv6_key->ipv6_tclass, is_mask); | |
689 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
690 | ipv6_key->ipv6_hlimit, is_mask); | |
691 | SW_FLOW_KEY_PUT(match, ip.frag, | |
692 | ipv6_key->ipv6_frag, is_mask); | |
693 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
694 | ipv6_key->ipv6_src, | |
695 | sizeof(match->key->ipv6.addr.src), | |
696 | is_mask); | |
697 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
698 | ipv6_key->ipv6_dst, | |
699 | sizeof(match->key->ipv6.addr.dst), | |
700 | is_mask); | |
701 | ||
702 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
703 | } | |
704 | ||
705 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
706 | const struct ovs_key_arp *arp_key; | |
707 | ||
708 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
709 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
710 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", | |
711 | arp_key->arp_op); | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
715 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
716 | arp_key->arp_sip, is_mask); | |
717 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
718 | arp_key->arp_tip, is_mask); | |
719 | SW_FLOW_KEY_PUT(match, ip.proto, | |
720 | ntohs(arp_key->arp_op), is_mask); | |
721 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
722 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
723 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
724 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
725 | ||
726 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
727 | } | |
728 | ||
729 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { | |
730 | const struct ovs_key_tcp *tcp_key; | |
731 | ||
732 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
733 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
734 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
735 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
736 | } | |
737 | ||
5eb26b15 JR |
738 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
739 | if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1139e241 | 740 | SW_FLOW_KEY_PUT(match, tp.flags, |
5eb26b15 JR |
741 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), |
742 | is_mask); | |
743 | } else { | |
1139e241 | 744 | SW_FLOW_KEY_PUT(match, tp.flags, |
5eb26b15 JR |
745 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), |
746 | is_mask); | |
747 | } | |
748 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); | |
749 | } | |
750 | ||
e6445719 PS |
751 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
752 | const struct ovs_key_udp *udp_key; | |
753 | ||
754 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
755 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
756 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
757 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
758 | } | |
759 | ||
760 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
761 | const struct ovs_key_sctp *sctp_key; | |
762 | ||
763 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
764 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
765 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
766 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
767 | } | |
768 | ||
769 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
770 | const struct ovs_key_icmp *icmp_key; | |
771 | ||
772 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 773 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 774 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 775 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
776 | htons(icmp_key->icmp_code), is_mask); |
777 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
778 | } | |
779 | ||
780 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
781 | const struct ovs_key_icmpv6 *icmpv6_key; | |
782 | ||
783 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 784 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 785 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 786 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
787 | htons(icmpv6_key->icmpv6_code), is_mask); |
788 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
789 | } | |
790 | ||
791 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
792 | const struct ovs_key_nd *nd_key; | |
793 | ||
794 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
795 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
796 | nd_key->nd_target, | |
797 | sizeof(match->key->ipv6.nd.target), | |
798 | is_mask); | |
799 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
800 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
801 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
802 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
803 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
804 | } | |
805 | ||
806 | if (attrs != 0) | |
807 | return -EINVAL; | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static void sw_flow_mask_set(struct sw_flow_mask *mask, | |
813 | struct sw_flow_key_range *range, u8 val) | |
814 | { | |
815 | u8 *m = (u8 *)&mask->key + range->start; | |
816 | ||
817 | mask->range = *range; | |
818 | memset(m, val, range_n_bytes(range)); | |
819 | } | |
820 | ||
821 | /** | |
822 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
823 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
824 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
825 | * does not include any don't care bit. | |
826 | * @match: receives the extracted flow match information. | |
827 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
828 | * sequence. The fields should of the packet that triggered the creation | |
829 | * of this flow. | |
830 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
831 | * attribute specifies the mask field of the wildcarded flow. | |
832 | */ | |
833 | int ovs_nla_get_match(struct sw_flow_match *match, | |
834 | const struct nlattr *key, | |
835 | const struct nlattr *mask) | |
836 | { | |
837 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
838 | const struct nlattr *encap; | |
839 | u64 key_attrs = 0; | |
840 | u64 mask_attrs = 0; | |
841 | bool encap_valid = false; | |
842 | int err; | |
843 | ||
844 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
845 | if (err) | |
846 | return err; | |
847 | ||
848 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
849 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
850 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
851 | __be16 tci; | |
852 | ||
853 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
854 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
855 | OVS_NLERR("Invalid Vlan frame.\n"); | |
856 | return -EINVAL; | |
857 | } | |
858 | ||
859 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
860 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
861 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
862 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
863 | encap_valid = true; | |
864 | ||
865 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
866 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
867 | if (err) | |
868 | return err; | |
869 | } else if (!tci) { | |
870 | /* Corner case for truncated 802.1Q header. */ | |
871 | if (nla_len(encap)) { | |
872 | OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n"); | |
873 | return -EINVAL; | |
874 | } | |
875 | } else { | |
876 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); | |
877 | return -EINVAL; | |
878 | } | |
879 | } | |
880 | ||
23dabf88 | 881 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
e6445719 PS |
882 | if (err) |
883 | return err; | |
884 | ||
885 | if (mask) { | |
886 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); | |
887 | if (err) | |
888 | return err; | |
889 | ||
890 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { | |
891 | __be16 eth_type = 0; | |
892 | __be16 tci = 0; | |
893 | ||
894 | if (!encap_valid) { | |
895 | OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n"); | |
896 | return -EINVAL; | |
897 | } | |
898 | ||
899 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
900 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
901 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
902 | ||
903 | if (eth_type == htons(0xffff)) { | |
904 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
905 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
906 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
907 | } else { | |
908 | OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n", | |
909 | ntohs(eth_type)); | |
910 | return -EINVAL; | |
911 | } | |
912 | ||
913 | if (a[OVS_KEY_ATTR_VLAN]) | |
914 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
915 | ||
916 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
917 | OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci)); | |
918 | return -EINVAL; | |
919 | } | |
920 | } | |
921 | ||
23dabf88 | 922 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
e6445719 PS |
923 | if (err) |
924 | return err; | |
925 | } else { | |
926 | /* Populate exact match flow's key mask. */ | |
927 | if (match->mask) | |
928 | sw_flow_mask_set(match->mask, &match->range, 0xff); | |
929 | } | |
930 | ||
931 | if (!match_validate(match, key_attrs, mask_attrs)) | |
932 | return -EINVAL; | |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | /** | |
938 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 939 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
940 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
941 | * sequence. | |
942 | * | |
943 | * This parses a series of Netlink attributes that form a flow key, which must | |
944 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
945 | * get the metadata, that is, the parts of the flow key that cannot be | |
946 | * extracted from the packet itself. | |
947 | */ | |
948 | ||
83c8df26 PS |
949 | int ovs_nla_get_flow_metadata(const struct nlattr *attr, |
950 | struct sw_flow_key *key) | |
e6445719 | 951 | { |
e6445719 | 952 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 953 | struct sw_flow_match match; |
e6445719 PS |
954 | u64 attrs = 0; |
955 | int err; | |
e6445719 PS |
956 | |
957 | err = parse_flow_nlattrs(attr, a, &attrs); | |
958 | if (err) | |
959 | return -EINVAL; | |
960 | ||
961 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 962 | match.key = key; |
e6445719 | 963 | |
83c8df26 | 964 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 965 | |
83c8df26 | 966 | return metadata_from_nlattrs(&match, &attrs, a, false); |
e6445719 PS |
967 | } |
968 | ||
969 | int ovs_nla_put_flow(const struct sw_flow_key *swkey, | |
970 | const struct sw_flow_key *output, struct sk_buff *skb) | |
971 | { | |
972 | struct ovs_key_ethernet *eth_key; | |
973 | struct nlattr *nla, *encap; | |
974 | bool is_mask = (swkey != output); | |
975 | ||
971427f3 AZ |
976 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
977 | goto nla_put_failure; | |
978 | ||
979 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
980 | goto nla_put_failure; | |
981 | ||
e6445719 PS |
982 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
983 | goto nla_put_failure; | |
984 | ||
f5796684 JG |
985 | if ((swkey->tun_key.ipv4_dst || is_mask)) { |
986 | const struct geneve_opt *opts = NULL; | |
987 | ||
988 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
989 | opts = GENEVE_OPTS(output, swkey->tun_opts_len); | |
990 | ||
991 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, | |
992 | swkey->tun_opts_len)) | |
993 | goto nla_put_failure; | |
994 | } | |
e6445719 PS |
995 | |
996 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
997 | if (is_mask && (output->phy.in_port == 0xffff)) | |
998 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
999 | goto nla_put_failure; | |
1000 | } else { | |
1001 | u16 upper_u16; | |
1002 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1003 | ||
1004 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1005 | (upper_u16 << 16) | output->phy.in_port)) | |
1006 | goto nla_put_failure; | |
1007 | } | |
1008 | ||
1009 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1010 | goto nla_put_failure; | |
1011 | ||
1012 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); | |
1013 | if (!nla) | |
1014 | goto nla_put_failure; | |
1015 | ||
1016 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1017 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1018 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 PS |
1019 | |
1020 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1021 | __be16 eth_type; | |
1022 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1023 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1024 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1025 | goto nla_put_failure; | |
1026 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1027 | if (!swkey->eth.tci) | |
1028 | goto unencap; | |
1029 | } else | |
1030 | encap = NULL; | |
1031 | ||
1032 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1033 | /* | |
1034 | * Ethertype 802.2 is represented in the netlink with omitted | |
1035 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1036 | * 0xffff in the mask attribute. Ethertype can also | |
1037 | * be wildcarded. | |
1038 | */ | |
1039 | if (is_mask && output->eth.type) | |
1040 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1041 | output->eth.type)) | |
1042 | goto nla_put_failure; | |
1043 | goto unencap; | |
1044 | } | |
1045 | ||
1046 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1047 | goto nla_put_failure; | |
1048 | ||
1049 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1050 | struct ovs_key_ipv4 *ipv4_key; | |
1051 | ||
1052 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1053 | if (!nla) | |
1054 | goto nla_put_failure; | |
1055 | ipv4_key = nla_data(nla); | |
1056 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1057 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1058 | ipv4_key->ipv4_proto = output->ip.proto; | |
1059 | ipv4_key->ipv4_tos = output->ip.tos; | |
1060 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1061 | ipv4_key->ipv4_frag = output->ip.frag; | |
1062 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1063 | struct ovs_key_ipv6 *ipv6_key; | |
1064 | ||
1065 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1066 | if (!nla) | |
1067 | goto nla_put_failure; | |
1068 | ipv6_key = nla_data(nla); | |
1069 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1070 | sizeof(ipv6_key->ipv6_src)); | |
1071 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1072 | sizeof(ipv6_key->ipv6_dst)); | |
1073 | ipv6_key->ipv6_label = output->ipv6.label; | |
1074 | ipv6_key->ipv6_proto = output->ip.proto; | |
1075 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1076 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1077 | ipv6_key->ipv6_frag = output->ip.frag; | |
1078 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1079 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1080 | struct ovs_key_arp *arp_key; | |
1081 | ||
1082 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1083 | if (!nla) | |
1084 | goto nla_put_failure; | |
1085 | arp_key = nla_data(nla); | |
1086 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1087 | arp_key->arp_sip = output->ipv4.addr.src; | |
1088 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1089 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1090 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1091 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
e6445719 PS |
1092 | } |
1093 | ||
1094 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1095 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1096 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1097 | ||
1098 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1099 | struct ovs_key_tcp *tcp_key; | |
1100 | ||
1101 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1102 | if (!nla) | |
1103 | goto nla_put_failure; | |
1104 | tcp_key = nla_data(nla); | |
1139e241 JR |
1105 | tcp_key->tcp_src = output->tp.src; |
1106 | tcp_key->tcp_dst = output->tp.dst; | |
1107 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1108 | output->tp.flags)) | |
1109 | goto nla_put_failure; | |
e6445719 PS |
1110 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1111 | struct ovs_key_udp *udp_key; | |
1112 | ||
1113 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1114 | if (!nla) | |
1115 | goto nla_put_failure; | |
1116 | udp_key = nla_data(nla); | |
1139e241 JR |
1117 | udp_key->udp_src = output->tp.src; |
1118 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1119 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1120 | struct ovs_key_sctp *sctp_key; | |
1121 | ||
1122 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1123 | if (!nla) | |
1124 | goto nla_put_failure; | |
1125 | sctp_key = nla_data(nla); | |
1139e241 JR |
1126 | sctp_key->sctp_src = output->tp.src; |
1127 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1128 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1129 | swkey->ip.proto == IPPROTO_ICMP) { | |
1130 | struct ovs_key_icmp *icmp_key; | |
1131 | ||
1132 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1133 | if (!nla) | |
1134 | goto nla_put_failure; | |
1135 | icmp_key = nla_data(nla); | |
1139e241 JR |
1136 | icmp_key->icmp_type = ntohs(output->tp.src); |
1137 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1138 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1139 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1140 | struct ovs_key_icmpv6 *icmpv6_key; | |
1141 | ||
1142 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1143 | sizeof(*icmpv6_key)); | |
1144 | if (!nla) | |
1145 | goto nla_put_failure; | |
1146 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1147 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1148 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1149 | |
1150 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1151 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1152 | struct ovs_key_nd *nd_key; | |
1153 | ||
1154 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1155 | if (!nla) | |
1156 | goto nla_put_failure; | |
1157 | nd_key = nla_data(nla); | |
1158 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1159 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1160 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1161 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1162 | } |
1163 | } | |
1164 | } | |
1165 | ||
1166 | unencap: | |
1167 | if (encap) | |
1168 | nla_nest_end(skb, encap); | |
1169 | ||
1170 | return 0; | |
1171 | ||
1172 | nla_put_failure: | |
1173 | return -EMSGSIZE; | |
1174 | } | |
1175 | ||
1176 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) | |
1177 | ||
1178 | struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size) | |
1179 | { | |
1180 | struct sw_flow_actions *sfa; | |
1181 | ||
1182 | if (size > MAX_ACTIONS_BUFSIZE) | |
1183 | return ERR_PTR(-EINVAL); | |
1184 | ||
1185 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1186 | if (!sfa) | |
1187 | return ERR_PTR(-ENOMEM); | |
1188 | ||
1189 | sfa->actions_len = 0; | |
1190 | return sfa; | |
1191 | } | |
1192 | ||
e6445719 PS |
1193 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1194 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
1195 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1196 | { | |
11d6c461 | 1197 | kfree_rcu(sf_acts, rcu); |
e6445719 PS |
1198 | } |
1199 | ||
1200 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
1201 | int attr_len) | |
1202 | { | |
1203 | ||
1204 | struct sw_flow_actions *acts; | |
1205 | int new_acts_size; | |
1206 | int req_size = NLA_ALIGN(attr_len); | |
1207 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1208 | (*sfa)->actions_len; | |
1209 | ||
1210 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1211 | goto out; | |
1212 | ||
1213 | new_acts_size = ksize(*sfa) * 2; | |
1214 | ||
1215 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1216 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1217 | return ERR_PTR(-EMSGSIZE); | |
1218 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1219 | } | |
1220 | ||
1221 | acts = ovs_nla_alloc_flow_actions(new_acts_size); | |
1222 | if (IS_ERR(acts)) | |
1223 | return (void *)acts; | |
1224 | ||
1225 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1226 | acts->actions_len = (*sfa)->actions_len; | |
1227 | kfree(*sfa); | |
1228 | *sfa = acts; | |
1229 | ||
1230 | out: | |
1231 | (*sfa)->actions_len += req_size; | |
1232 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1233 | } | |
1234 | ||
f0b128c1 JG |
1235 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
1236 | int attrtype, void *data, int len) | |
e6445719 PS |
1237 | { |
1238 | struct nlattr *a; | |
1239 | ||
1240 | a = reserve_sfa_size(sfa, nla_attr_size(len)); | |
1241 | if (IS_ERR(a)) | |
f0b128c1 | 1242 | return a; |
e6445719 PS |
1243 | |
1244 | a->nla_type = attrtype; | |
1245 | a->nla_len = nla_attr_size(len); | |
1246 | ||
1247 | if (data) | |
1248 | memcpy(nla_data(a), data, len); | |
1249 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1250 | ||
f0b128c1 JG |
1251 | return a; |
1252 | } | |
1253 | ||
1254 | static int add_action(struct sw_flow_actions **sfa, int attrtype, | |
1255 | void *data, int len) | |
1256 | { | |
1257 | struct nlattr *a; | |
1258 | ||
1259 | a = __add_action(sfa, attrtype, data, len); | |
1260 | if (IS_ERR(a)) | |
1261 | return PTR_ERR(a); | |
1262 | ||
e6445719 PS |
1263 | return 0; |
1264 | } | |
1265 | ||
1266 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
1267 | int attrtype) | |
1268 | { | |
1269 | int used = (*sfa)->actions_len; | |
1270 | int err; | |
1271 | ||
1272 | err = add_action(sfa, attrtype, NULL, 0); | |
1273 | if (err) | |
1274 | return err; | |
1275 | ||
1276 | return used; | |
1277 | } | |
1278 | ||
1279 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1280 | int st_offset) | |
1281 | { | |
1282 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1283 | st_offset); | |
1284 | ||
1285 | a->nla_len = sfa->actions_len - st_offset; | |
1286 | } | |
1287 | ||
1288 | static int validate_and_copy_sample(const struct nlattr *attr, | |
1289 | const struct sw_flow_key *key, int depth, | |
1290 | struct sw_flow_actions **sfa) | |
1291 | { | |
1292 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1293 | const struct nlattr *probability, *actions; | |
1294 | const struct nlattr *a; | |
1295 | int rem, start, err, st_acts; | |
1296 | ||
1297 | memset(attrs, 0, sizeof(attrs)); | |
1298 | nla_for_each_nested(a, attr, rem) { | |
1299 | int type = nla_type(a); | |
1300 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1301 | return -EINVAL; | |
1302 | attrs[type] = a; | |
1303 | } | |
1304 | if (rem) | |
1305 | return -EINVAL; | |
1306 | ||
1307 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1308 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1309 | return -EINVAL; | |
1310 | ||
1311 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1312 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1313 | return -EINVAL; | |
1314 | ||
1315 | /* validation done, copy sample action. */ | |
1316 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); | |
1317 | if (start < 0) | |
1318 | return start; | |
1319 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, | |
1320 | nla_data(probability), sizeof(u32)); | |
1321 | if (err) | |
1322 | return err; | |
1323 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); | |
1324 | if (st_acts < 0) | |
1325 | return st_acts; | |
1326 | ||
1327 | err = ovs_nla_copy_actions(actions, key, depth + 1, sfa); | |
1328 | if (err) | |
1329 | return err; | |
1330 | ||
1331 | add_nested_action_end(*sfa, st_acts); | |
1332 | add_nested_action_end(*sfa, start); | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | static int validate_tp_port(const struct sw_flow_key *flow_key) | |
1338 | { | |
1139e241 JR |
1339 | if ((flow_key->eth.type == htons(ETH_P_IP) || |
1340 | flow_key->eth.type == htons(ETH_P_IPV6)) && | |
1341 | (flow_key->tp.src || flow_key->tp.dst)) | |
1342 | return 0; | |
e6445719 PS |
1343 | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
1347 | void ovs_match_init(struct sw_flow_match *match, | |
1348 | struct sw_flow_key *key, | |
1349 | struct sw_flow_mask *mask) | |
1350 | { | |
1351 | memset(match, 0, sizeof(*match)); | |
1352 | match->key = key; | |
1353 | match->mask = mask; | |
1354 | ||
1355 | memset(key, 0, sizeof(*key)); | |
1356 | ||
1357 | if (mask) { | |
1358 | memset(&mask->key, 0, sizeof(mask->key)); | |
1359 | mask->range.start = mask->range.end = 0; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | static int validate_and_copy_set_tun(const struct nlattr *attr, | |
1364 | struct sw_flow_actions **sfa) | |
1365 | { | |
1366 | struct sw_flow_match match; | |
1367 | struct sw_flow_key key; | |
f0b128c1 JG |
1368 | struct ovs_tunnel_info *tun_info; |
1369 | struct nlattr *a; | |
e6445719 PS |
1370 | int err, start; |
1371 | ||
1372 | ovs_match_init(&match, &key, NULL); | |
1373 | err = ipv4_tun_from_nlattr(nla_data(attr), &match, false); | |
1374 | if (err) | |
1375 | return err; | |
1376 | ||
f5796684 JG |
1377 | if (key.tun_opts_len) { |
1378 | struct geneve_opt *option = GENEVE_OPTS(&key, | |
1379 | key.tun_opts_len); | |
1380 | int opts_len = key.tun_opts_len; | |
1381 | bool crit_opt = false; | |
1382 | ||
1383 | while (opts_len > 0) { | |
1384 | int len; | |
1385 | ||
1386 | if (opts_len < sizeof(*option)) | |
1387 | return -EINVAL; | |
1388 | ||
1389 | len = sizeof(*option) + option->length * 4; | |
1390 | if (len > opts_len) | |
1391 | return -EINVAL; | |
1392 | ||
1393 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1394 | ||
1395 | option = (struct geneve_opt *)((u8 *)option + len); | |
1396 | opts_len -= len; | |
1397 | }; | |
1398 | ||
1399 | key.tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1400 | }; | |
1401 | ||
e6445719 PS |
1402 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); |
1403 | if (start < 0) | |
1404 | return start; | |
1405 | ||
f0b128c1 | 1406 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
f5796684 | 1407 | sizeof(*tun_info) + key.tun_opts_len); |
f0b128c1 JG |
1408 | if (IS_ERR(a)) |
1409 | return PTR_ERR(a); | |
1410 | ||
1411 | tun_info = nla_data(a); | |
1412 | tun_info->tunnel = key.tun_key; | |
f5796684 JG |
1413 | tun_info->options_len = key.tun_opts_len; |
1414 | ||
1415 | if (tun_info->options_len) { | |
1416 | /* We need to store the options in the action itself since | |
1417 | * everything else will go away after flow setup. We can append | |
1418 | * it to tun_info and then point there. | |
1419 | */ | |
1420 | memcpy((tun_info + 1), GENEVE_OPTS(&key, key.tun_opts_len), | |
1421 | key.tun_opts_len); | |
1422 | tun_info->options = (struct geneve_opt *)(tun_info + 1); | |
1423 | } else { | |
1424 | tun_info->options = NULL; | |
1425 | } | |
f0b128c1 | 1426 | |
e6445719 PS |
1427 | add_nested_action_end(*sfa, start); |
1428 | ||
1429 | return err; | |
1430 | } | |
1431 | ||
1432 | static int validate_set(const struct nlattr *a, | |
1433 | const struct sw_flow_key *flow_key, | |
1434 | struct sw_flow_actions **sfa, | |
1435 | bool *set_tun) | |
1436 | { | |
1437 | const struct nlattr *ovs_key = nla_data(a); | |
1438 | int key_type = nla_type(ovs_key); | |
1439 | ||
1440 | /* There can be only one key in a action */ | |
1441 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
1442 | return -EINVAL; | |
1443 | ||
1444 | if (key_type > OVS_KEY_ATTR_MAX || | |
1445 | (ovs_key_lens[key_type] != nla_len(ovs_key) && | |
1446 | ovs_key_lens[key_type] != -1)) | |
1447 | return -EINVAL; | |
1448 | ||
1449 | switch (key_type) { | |
1450 | const struct ovs_key_ipv4 *ipv4_key; | |
1451 | const struct ovs_key_ipv6 *ipv6_key; | |
1452 | int err; | |
1453 | ||
1454 | case OVS_KEY_ATTR_PRIORITY: | |
1455 | case OVS_KEY_ATTR_SKB_MARK: | |
1456 | case OVS_KEY_ATTR_ETHERNET: | |
1457 | break; | |
1458 | ||
1459 | case OVS_KEY_ATTR_TUNNEL: | |
1460 | *set_tun = true; | |
1461 | err = validate_and_copy_set_tun(a, sfa); | |
1462 | if (err) | |
1463 | return err; | |
1464 | break; | |
1465 | ||
1466 | case OVS_KEY_ATTR_IPV4: | |
1467 | if (flow_key->eth.type != htons(ETH_P_IP)) | |
1468 | return -EINVAL; | |
1469 | ||
1470 | if (!flow_key->ip.proto) | |
1471 | return -EINVAL; | |
1472 | ||
1473 | ipv4_key = nla_data(ovs_key); | |
1474 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
1475 | return -EINVAL; | |
1476 | ||
1477 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | break; | |
1481 | ||
1482 | case OVS_KEY_ATTR_IPV6: | |
1483 | if (flow_key->eth.type != htons(ETH_P_IPV6)) | |
1484 | return -EINVAL; | |
1485 | ||
1486 | if (!flow_key->ip.proto) | |
1487 | return -EINVAL; | |
1488 | ||
1489 | ipv6_key = nla_data(ovs_key); | |
1490 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
1491 | return -EINVAL; | |
1492 | ||
1493 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
1494 | return -EINVAL; | |
1495 | ||
1496 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
1497 | return -EINVAL; | |
1498 | ||
1499 | break; | |
1500 | ||
1501 | case OVS_KEY_ATTR_TCP: | |
1502 | if (flow_key->ip.proto != IPPROTO_TCP) | |
1503 | return -EINVAL; | |
1504 | ||
1505 | return validate_tp_port(flow_key); | |
1506 | ||
1507 | case OVS_KEY_ATTR_UDP: | |
1508 | if (flow_key->ip.proto != IPPROTO_UDP) | |
1509 | return -EINVAL; | |
1510 | ||
1511 | return validate_tp_port(flow_key); | |
1512 | ||
1513 | case OVS_KEY_ATTR_SCTP: | |
1514 | if (flow_key->ip.proto != IPPROTO_SCTP) | |
1515 | return -EINVAL; | |
1516 | ||
1517 | return validate_tp_port(flow_key); | |
1518 | ||
1519 | default: | |
1520 | return -EINVAL; | |
1521 | } | |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static int validate_userspace(const struct nlattr *attr) | |
1527 | { | |
1528 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
1529 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
1530 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
1531 | }; | |
1532 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
1533 | int error; | |
1534 | ||
1535 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
1536 | attr, userspace_policy); | |
1537 | if (error) | |
1538 | return error; | |
1539 | ||
1540 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
1541 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
1542 | return -EINVAL; | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | static int copy_action(const struct nlattr *from, | |
1548 | struct sw_flow_actions **sfa) | |
1549 | { | |
1550 | int totlen = NLA_ALIGN(from->nla_len); | |
1551 | struct nlattr *to; | |
1552 | ||
1553 | to = reserve_sfa_size(sfa, from->nla_len); | |
1554 | if (IS_ERR(to)) | |
1555 | return PTR_ERR(to); | |
1556 | ||
1557 | memcpy(to, from, totlen); | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | int ovs_nla_copy_actions(const struct nlattr *attr, | |
1562 | const struct sw_flow_key *key, | |
1563 | int depth, | |
1564 | struct sw_flow_actions **sfa) | |
1565 | { | |
1566 | const struct nlattr *a; | |
1567 | int rem, err; | |
1568 | ||
1569 | if (depth >= SAMPLE_ACTION_DEPTH) | |
1570 | return -EOVERFLOW; | |
1571 | ||
1572 | nla_for_each_nested(a, attr, rem) { | |
1573 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
1574 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
1575 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 1576 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 PS |
1577 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
1578 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), | |
1579 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
1580 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
971427f3 AZ |
1581 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
1582 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash) | |
e6445719 PS |
1583 | }; |
1584 | const struct ovs_action_push_vlan *vlan; | |
1585 | int type = nla_type(a); | |
1586 | bool skip_copy; | |
1587 | ||
1588 | if (type > OVS_ACTION_ATTR_MAX || | |
1589 | (action_lens[type] != nla_len(a) && | |
1590 | action_lens[type] != (u32)-1)) | |
1591 | return -EINVAL; | |
1592 | ||
1593 | skip_copy = false; | |
1594 | switch (type) { | |
1595 | case OVS_ACTION_ATTR_UNSPEC: | |
1596 | return -EINVAL; | |
1597 | ||
1598 | case OVS_ACTION_ATTR_USERSPACE: | |
1599 | err = validate_userspace(a); | |
1600 | if (err) | |
1601 | return err; | |
1602 | break; | |
1603 | ||
1604 | case OVS_ACTION_ATTR_OUTPUT: | |
1605 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
1606 | return -EINVAL; | |
1607 | break; | |
1608 | ||
971427f3 AZ |
1609 | case OVS_ACTION_ATTR_HASH: { |
1610 | const struct ovs_action_hash *act_hash = nla_data(a); | |
1611 | ||
1612 | switch (act_hash->hash_alg) { | |
1613 | case OVS_HASH_ALG_L4: | |
1614 | break; | |
1615 | default: | |
1616 | return -EINVAL; | |
1617 | } | |
1618 | ||
1619 | break; | |
1620 | } | |
e6445719 PS |
1621 | |
1622 | case OVS_ACTION_ATTR_POP_VLAN: | |
1623 | break; | |
1624 | ||
1625 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
1626 | vlan = nla_data(a); | |
1627 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
1628 | return -EINVAL; | |
1629 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
1630 | return -EINVAL; | |
1631 | break; | |
1632 | ||
971427f3 AZ |
1633 | case OVS_ACTION_ATTR_RECIRC: |
1634 | break; | |
1635 | ||
e6445719 PS |
1636 | case OVS_ACTION_ATTR_SET: |
1637 | err = validate_set(a, key, sfa, &skip_copy); | |
1638 | if (err) | |
1639 | return err; | |
1640 | break; | |
1641 | ||
1642 | case OVS_ACTION_ATTR_SAMPLE: | |
1643 | err = validate_and_copy_sample(a, key, depth, sfa); | |
1644 | if (err) | |
1645 | return err; | |
1646 | skip_copy = true; | |
1647 | break; | |
1648 | ||
1649 | default: | |
1650 | return -EINVAL; | |
1651 | } | |
1652 | if (!skip_copy) { | |
1653 | err = copy_action(a, sfa); | |
1654 | if (err) | |
1655 | return err; | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | if (rem > 0) | |
1660 | return -EINVAL; | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) | |
1666 | { | |
1667 | const struct nlattr *a; | |
1668 | struct nlattr *start; | |
1669 | int err = 0, rem; | |
1670 | ||
1671 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1672 | if (!start) | |
1673 | return -EMSGSIZE; | |
1674 | ||
1675 | nla_for_each_nested(a, attr, rem) { | |
1676 | int type = nla_type(a); | |
1677 | struct nlattr *st_sample; | |
1678 | ||
1679 | switch (type) { | |
1680 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1681 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
1682 | sizeof(u32), nla_data(a))) | |
1683 | return -EMSGSIZE; | |
1684 | break; | |
1685 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1686 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1687 | if (!st_sample) | |
1688 | return -EMSGSIZE; | |
1689 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
1690 | if (err) | |
1691 | return err; | |
1692 | nla_nest_end(skb, st_sample); | |
1693 | break; | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | nla_nest_end(skb, start); | |
1698 | return err; | |
1699 | } | |
1700 | ||
1701 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
1702 | { | |
1703 | const struct nlattr *ovs_key = nla_data(a); | |
1704 | int key_type = nla_type(ovs_key); | |
1705 | struct nlattr *start; | |
1706 | int err; | |
1707 | ||
1708 | switch (key_type) { | |
f0b128c1 JG |
1709 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
1710 | struct ovs_tunnel_info *tun_info = nla_data(ovs_key); | |
1711 | ||
e6445719 PS |
1712 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
1713 | if (!start) | |
1714 | return -EMSGSIZE; | |
1715 | ||
f0b128c1 | 1716 | err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel, |
f5796684 JG |
1717 | tun_info->options_len ? |
1718 | tun_info->options : NULL, | |
1719 | tun_info->options_len); | |
e6445719 PS |
1720 | if (err) |
1721 | return err; | |
1722 | nla_nest_end(skb, start); | |
1723 | break; | |
f0b128c1 | 1724 | } |
e6445719 PS |
1725 | default: |
1726 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1727 | return -EMSGSIZE; | |
1728 | break; | |
1729 | } | |
1730 | ||
1731 | return 0; | |
1732 | } | |
1733 | ||
1734 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1735 | { | |
1736 | const struct nlattr *a; | |
1737 | int rem, err; | |
1738 | ||
1739 | nla_for_each_attr(a, attr, len, rem) { | |
1740 | int type = nla_type(a); | |
1741 | ||
1742 | switch (type) { | |
1743 | case OVS_ACTION_ATTR_SET: | |
1744 | err = set_action_to_attr(a, skb); | |
1745 | if (err) | |
1746 | return err; | |
1747 | break; | |
1748 | ||
1749 | case OVS_ACTION_ATTR_SAMPLE: | |
1750 | err = sample_action_to_attr(a, skb); | |
1751 | if (err) | |
1752 | return err; | |
1753 | break; | |
1754 | default: | |
1755 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
1756 | return -EMSGSIZE; | |
1757 | break; | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | return 0; | |
1762 | } |