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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> | |
25cd9ba0 | 49 | #include <net/mpls.h> |
e6445719 PS |
50 | |
51 | #include "flow_netlink.h" | |
52 | ||
a85311bf PS |
53 | static void update_range(struct sw_flow_match *match, |
54 | size_t offset, size_t size, bool is_mask) | |
e6445719 | 55 | { |
a85311bf | 56 | struct sw_flow_key_range *range; |
e6445719 PS |
57 | size_t start = rounddown(offset, sizeof(long)); |
58 | size_t end = roundup(offset + size, sizeof(long)); | |
59 | ||
60 | if (!is_mask) | |
61 | range = &match->range; | |
a85311bf | 62 | else |
e6445719 PS |
63 | range = &match->mask->range; |
64 | ||
e6445719 PS |
65 | if (range->start == range->end) { |
66 | range->start = start; | |
67 | range->end = end; | |
68 | return; | |
69 | } | |
70 | ||
71 | if (range->start > start) | |
72 | range->start = start; | |
73 | ||
74 | if (range->end < end) | |
75 | range->end = end; | |
76 | } | |
77 | ||
78 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
79 | do { \ | |
a85311bf PS |
80 | update_range(match, offsetof(struct sw_flow_key, field), \ |
81 | sizeof((match)->key->field), is_mask); \ | |
82 | if (is_mask) \ | |
83 | (match)->mask->key.field = value; \ | |
84 | else \ | |
e6445719 | 85 | (match)->key->field = value; \ |
e6445719 PS |
86 | } while (0) |
87 | ||
f5796684 JG |
88 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
89 | do { \ | |
a85311bf | 90 | update_range(match, offset, len, is_mask); \ |
f5796684 JG |
91 | if (is_mask) \ |
92 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
a85311bf | 93 | len); \ |
f5796684 JG |
94 | else \ |
95 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
e6445719 PS |
96 | } while (0) |
97 | ||
f5796684 JG |
98 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
99 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
100 | value_p, len, is_mask) | |
101 | ||
a85311bf PS |
102 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ |
103 | do { \ | |
104 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
105 | sizeof((match)->key->field), is_mask); \ | |
106 | if (is_mask) \ | |
107 | memset((u8 *)&(match)->mask->key.field, value, \ | |
108 | sizeof((match)->mask->key.field)); \ | |
109 | else \ | |
f47de068 PS |
110 | memset((u8 *)&(match)->key->field, value, \ |
111 | sizeof((match)->key->field)); \ | |
f47de068 | 112 | } while (0) |
e6445719 PS |
113 | |
114 | static bool match_validate(const struct sw_flow_match *match, | |
05da5898 | 115 | u64 key_attrs, u64 mask_attrs, bool log) |
e6445719 PS |
116 | { |
117 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
118 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
119 | ||
120 | /* The following mask attributes allowed only if they | |
121 | * pass the validation tests. */ | |
122 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
123 | | (1 << OVS_KEY_ATTR_IPV6) | |
124 | | (1 << OVS_KEY_ATTR_TCP) | |
5eb26b15 | 125 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
e6445719 PS |
126 | | (1 << OVS_KEY_ATTR_UDP) |
127 | | (1 << OVS_KEY_ATTR_SCTP) | |
128 | | (1 << OVS_KEY_ATTR_ICMP) | |
129 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
130 | | (1 << OVS_KEY_ATTR_ARP) | |
25cd9ba0 SH |
131 | | (1 << OVS_KEY_ATTR_ND) |
132 | | (1 << OVS_KEY_ATTR_MPLS)); | |
e6445719 PS |
133 | |
134 | /* Always allowed mask fields. */ | |
135 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
136 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
137 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
138 | ||
139 | /* Check key attributes. */ | |
140 | if (match->key->eth.type == htons(ETH_P_ARP) | |
141 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
142 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
143 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
144 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; | |
145 | } | |
146 | ||
25cd9ba0 SH |
147 | if (eth_p_mpls(match->key->eth.type)) { |
148 | key_expected |= 1 << OVS_KEY_ATTR_MPLS; | |
149 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
150 | mask_allowed |= 1 << OVS_KEY_ATTR_MPLS; | |
151 | } | |
152 | ||
e6445719 PS |
153 | if (match->key->eth.type == htons(ETH_P_IP)) { |
154 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
155 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
156 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
157 | ||
158 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
159 | if (match->key->ip.proto == IPPROTO_UDP) { | |
160 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
161 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
162 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
163 | } | |
164 | ||
165 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
166 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
167 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
168 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
169 | } | |
170 | ||
171 | if (match->key->ip.proto == IPPROTO_TCP) { | |
172 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
173 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
174 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 175 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
176 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
177 | } | |
e6445719 PS |
178 | } |
179 | ||
180 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
181 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
182 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
183 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
184 | } | |
185 | } | |
186 | } | |
187 | ||
188 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
189 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
190 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
191 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
192 | ||
193 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
194 | if (match->key->ip.proto == IPPROTO_UDP) { | |
195 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
196 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
197 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
198 | } | |
199 | ||
200 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
201 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
202 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
203 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
204 | } | |
205 | ||
206 | if (match->key->ip.proto == IPPROTO_TCP) { | |
207 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
208 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
209 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 210 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
211 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
212 | } | |
e6445719 PS |
213 | } |
214 | ||
215 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
216 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
217 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
218 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
219 | ||
1139e241 | 220 | if (match->key->tp.src == |
e6445719 | 221 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
1139e241 | 222 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
e6445719 | 223 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
1139e241 | 224 | if (match->mask && (match->mask->key.tp.src == htons(0xffff))) |
e6445719 PS |
225 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
226 | } | |
227 | } | |
228 | } | |
229 | } | |
230 | ||
231 | if ((key_attrs & key_expected) != key_expected) { | |
232 | /* Key attributes check failed. */ | |
05da5898 JR |
233 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", |
234 | (unsigned long long)key_attrs, | |
235 | (unsigned long long)key_expected); | |
e6445719 PS |
236 | return false; |
237 | } | |
238 | ||
239 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
240 | /* Mask attributes check failed. */ | |
05da5898 JR |
241 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", |
242 | (unsigned long long)mask_attrs, | |
243 | (unsigned long long)mask_allowed); | |
e6445719 PS |
244 | return false; |
245 | } | |
246 | ||
247 | return true; | |
248 | } | |
249 | ||
8f0aad6f WZ |
250 | size_t ovs_tun_key_attr_size(void) |
251 | { | |
252 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
253 | * updating this function. | |
254 | */ | |
255 | return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
256 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
257 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
258 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
259 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
260 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
261 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
262 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
263 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
264 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ | |
265 | + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
266 | } | |
267 | ||
41af73e9 JS |
268 | size_t ovs_key_attr_size(void) |
269 | { | |
270 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
271 | * updating this function. | |
272 | */ | |
273 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 22); | |
274 | ||
275 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
276 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
8f0aad6f | 277 | + ovs_tun_key_attr_size() |
41af73e9 JS |
278 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
279 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
280 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
281 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
282 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
283 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
284 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
285 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
286 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
287 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
288 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
289 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
290 | } | |
291 | ||
e6445719 PS |
292 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
293 | static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { | |
294 | [OVS_KEY_ATTR_ENCAP] = -1, | |
295 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), | |
296 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
297 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), | |
298 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), | |
299 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), | |
300 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), | |
301 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), | |
302 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
303 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
5eb26b15 | 304 | [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16), |
e6445719 PS |
305 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), |
306 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), | |
307 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
308 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
309 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
310 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
971427f3 AZ |
311 | [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32), |
312 | [OVS_KEY_ATTR_DP_HASH] = sizeof(u32), | |
e6445719 | 313 | [OVS_KEY_ATTR_TUNNEL] = -1, |
25cd9ba0 | 314 | [OVS_KEY_ATTR_MPLS] = sizeof(struct ovs_key_mpls), |
e6445719 PS |
315 | }; |
316 | ||
317 | static bool is_all_zero(const u8 *fp, size_t size) | |
318 | { | |
319 | int i; | |
320 | ||
321 | if (!fp) | |
322 | return false; | |
323 | ||
324 | for (i = 0; i < size; i++) | |
325 | if (fp[i]) | |
326 | return false; | |
327 | ||
328 | return true; | |
329 | } | |
330 | ||
331 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
332 | const struct nlattr *a[], | |
05da5898 | 333 | u64 *attrsp, bool log, bool nz) |
e6445719 PS |
334 | { |
335 | const struct nlattr *nla; | |
336 | u64 attrs; | |
337 | int rem; | |
338 | ||
339 | attrs = *attrsp; | |
340 | nla_for_each_nested(nla, attr, rem) { | |
341 | u16 type = nla_type(nla); | |
342 | int expected_len; | |
343 | ||
344 | if (type > OVS_KEY_ATTR_MAX) { | |
05da5898 | 345 | OVS_NLERR(log, "Key type %d is out of range max %d", |
e6445719 PS |
346 | type, OVS_KEY_ATTR_MAX); |
347 | return -EINVAL; | |
348 | } | |
349 | ||
350 | if (attrs & (1 << type)) { | |
05da5898 | 351 | OVS_NLERR(log, "Duplicate key (type %d).", type); |
e6445719 PS |
352 | return -EINVAL; |
353 | } | |
354 | ||
355 | expected_len = ovs_key_lens[type]; | |
356 | if (nla_len(nla) != expected_len && expected_len != -1) { | |
05da5898 JR |
357 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", |
358 | type, nla_len(nla), expected_len); | |
e6445719 PS |
359 | return -EINVAL; |
360 | } | |
361 | ||
362 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
363 | attrs |= 1 << type; | |
364 | a[type] = nla; | |
365 | } | |
366 | } | |
367 | if (rem) { | |
05da5898 | 368 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); |
e6445719 PS |
369 | return -EINVAL; |
370 | } | |
371 | ||
372 | *attrsp = attrs; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
377 | const struct nlattr *a[], u64 *attrsp, |
378 | bool log) | |
e6445719 | 379 | { |
05da5898 | 380 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); |
e6445719 PS |
381 | } |
382 | ||
383 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
384 | const struct nlattr *a[], u64 *attrsp, |
385 | bool log) | |
e6445719 | 386 | { |
05da5898 JR |
387 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); |
388 | } | |
389 | ||
390 | static int genev_tun_opt_from_nlattr(const struct nlattr *a, | |
391 | struct sw_flow_match *match, bool is_mask, | |
392 | bool log) | |
393 | { | |
394 | unsigned long opt_key_offset; | |
395 | ||
396 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
397 | OVS_NLERR(log, "Geneve option length err (len %d, max %zu).", | |
398 | nla_len(a), sizeof(match->key->tun_opts)); | |
399 | return -EINVAL; | |
400 | } | |
401 | ||
402 | if (nla_len(a) % 4 != 0) { | |
403 | OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.", | |
404 | nla_len(a)); | |
405 | return -EINVAL; | |
406 | } | |
407 | ||
408 | /* We need to record the length of the options passed | |
409 | * down, otherwise packets with the same format but | |
410 | * additional options will be silently matched. | |
411 | */ | |
412 | if (!is_mask) { | |
413 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
414 | false); | |
415 | } else { | |
416 | /* This is somewhat unusual because it looks at | |
417 | * both the key and mask while parsing the | |
418 | * attributes (and by extension assumes the key | |
419 | * is parsed first). Normally, we would verify | |
420 | * that each is the correct length and that the | |
421 | * attributes line up in the validate function. | |
422 | * However, that is difficult because this is | |
423 | * variable length and we won't have the | |
424 | * information later. | |
425 | */ | |
426 | if (match->key->tun_opts_len != nla_len(a)) { | |
427 | OVS_NLERR(log, "Geneve option len %d != mask len %d", | |
428 | match->key->tun_opts_len, nla_len(a)); | |
429 | return -EINVAL; | |
430 | } | |
431 | ||
432 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
433 | } | |
434 | ||
435 | opt_key_offset = (unsigned long)GENEVE_OPTS((struct sw_flow_key *)0, | |
436 | nla_len(a)); | |
437 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), | |
438 | nla_len(a), is_mask); | |
439 | return 0; | |
e6445719 PS |
440 | } |
441 | ||
442 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, | |
05da5898 JR |
443 | struct sw_flow_match *match, bool is_mask, |
444 | bool log) | |
e6445719 PS |
445 | { |
446 | struct nlattr *a; | |
447 | int rem; | |
448 | bool ttl = false; | |
449 | __be16 tun_flags = 0; | |
450 | ||
451 | nla_for_each_nested(a, attr, rem) { | |
452 | int type = nla_type(a); | |
05da5898 JR |
453 | int err; |
454 | ||
e6445719 PS |
455 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
456 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
457 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
458 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
459 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
460 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
461 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
462 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
8f0aad6f WZ |
463 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = sizeof(u16), |
464 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = sizeof(u16), | |
67fa0341 | 465 | [OVS_TUNNEL_KEY_ATTR_OAM] = 0, |
f5796684 | 466 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1, |
e6445719 PS |
467 | }; |
468 | ||
469 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { | |
05da5898 JR |
470 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", |
471 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
e6445719 PS |
472 | return -EINVAL; |
473 | } | |
474 | ||
f5796684 JG |
475 | if (ovs_tunnel_key_lens[type] != nla_len(a) && |
476 | ovs_tunnel_key_lens[type] != -1) { | |
05da5898 | 477 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", |
e6445719 PS |
478 | type, nla_len(a), ovs_tunnel_key_lens[type]); |
479 | return -EINVAL; | |
480 | } | |
481 | ||
482 | switch (type) { | |
483 | case OVS_TUNNEL_KEY_ATTR_ID: | |
484 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
485 | nla_get_be64(a), is_mask); | |
486 | tun_flags |= TUNNEL_KEY; | |
487 | break; | |
488 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
489 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, | |
490 | nla_get_be32(a), is_mask); | |
491 | break; | |
492 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
493 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, | |
494 | nla_get_be32(a), is_mask); | |
495 | break; | |
496 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
497 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, | |
498 | nla_get_u8(a), is_mask); | |
499 | break; | |
500 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
501 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, | |
502 | nla_get_u8(a), is_mask); | |
503 | ttl = true; | |
504 | break; | |
505 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
506 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
507 | break; | |
508 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
509 | tun_flags |= TUNNEL_CSUM; | |
510 | break; | |
8f0aad6f WZ |
511 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: |
512 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
513 | nla_get_be16(a), is_mask); | |
514 | break; | |
515 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
516 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
517 | nla_get_be16(a), is_mask); | |
518 | break; | |
67fa0341 JG |
519 | case OVS_TUNNEL_KEY_ATTR_OAM: |
520 | tun_flags |= TUNNEL_OAM; | |
521 | break; | |
f5796684 | 522 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
05da5898 JR |
523 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); |
524 | if (err) | |
525 | return err; | |
f5796684 | 526 | |
05da5898 | 527 | tun_flags |= TUNNEL_OPTIONS_PRESENT; |
f5796684 | 528 | break; |
e6445719 | 529 | default: |
05da5898 | 530 | OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d", |
f5796684 | 531 | type); |
e6445719 PS |
532 | return -EINVAL; |
533 | } | |
534 | } | |
535 | ||
536 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
537 | ||
538 | if (rem > 0) { | |
05da5898 JR |
539 | OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.", |
540 | rem); | |
e6445719 PS |
541 | return -EINVAL; |
542 | } | |
543 | ||
544 | if (!is_mask) { | |
545 | if (!match->key->tun_key.ipv4_dst) { | |
05da5898 | 546 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); |
e6445719 PS |
547 | return -EINVAL; |
548 | } | |
549 | ||
550 | if (!ttl) { | |
05da5898 | 551 | OVS_NLERR(log, "IPv4 tunnel TTL not specified."); |
e6445719 PS |
552 | return -EINVAL; |
553 | } | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
f5796684 JG |
559 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
560 | const struct ovs_key_ipv4_tunnel *output, | |
561 | const struct geneve_opt *tun_opts, | |
562 | int swkey_tun_opts_len) | |
e6445719 | 563 | { |
e6445719 PS |
564 | if (output->tun_flags & TUNNEL_KEY && |
565 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
566 | return -EMSGSIZE; | |
567 | if (output->ipv4_src && | |
67fa0341 | 568 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) |
e6445719 PS |
569 | return -EMSGSIZE; |
570 | if (output->ipv4_dst && | |
67fa0341 | 571 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) |
e6445719 PS |
572 | return -EMSGSIZE; |
573 | if (output->ipv4_tos && | |
67fa0341 | 574 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
e6445719 PS |
575 | return -EMSGSIZE; |
576 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) | |
577 | return -EMSGSIZE; | |
578 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
67fa0341 | 579 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
e6445719 PS |
580 | return -EMSGSIZE; |
581 | if ((output->tun_flags & TUNNEL_CSUM) && | |
67fa0341 JG |
582 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
583 | return -EMSGSIZE; | |
8f0aad6f WZ |
584 | if (output->tp_src && |
585 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) | |
586 | return -EMSGSIZE; | |
587 | if (output->tp_dst && | |
588 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) | |
589 | return -EMSGSIZE; | |
67fa0341 JG |
590 | if ((output->tun_flags & TUNNEL_OAM) && |
591 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
e6445719 | 592 | return -EMSGSIZE; |
f5796684 JG |
593 | if (tun_opts && |
594 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
595 | swkey_tun_opts_len, tun_opts)) | |
596 | return -EMSGSIZE; | |
e6445719 | 597 | |
e6445719 PS |
598 | return 0; |
599 | } | |
600 | ||
f5796684 JG |
601 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
602 | const struct ovs_key_ipv4_tunnel *output, | |
603 | const struct geneve_opt *tun_opts, | |
604 | int swkey_tun_opts_len) | |
605 | { | |
606 | struct nlattr *nla; | |
607 | int err; | |
608 | ||
609 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
610 | if (!nla) | |
611 | return -EMSGSIZE; | |
612 | ||
613 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); | |
614 | if (err) | |
615 | return err; | |
616 | ||
617 | nla_nest_end(skb, nla); | |
618 | return 0; | |
619 | } | |
620 | ||
8f0aad6f WZ |
621 | int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb, |
622 | const struct ovs_tunnel_info *egress_tun_info) | |
623 | { | |
624 | return __ipv4_tun_to_nlattr(skb, &egress_tun_info->tunnel, | |
625 | egress_tun_info->options, | |
626 | egress_tun_info->options_len); | |
627 | } | |
628 | ||
e6445719 | 629 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
05da5898 JR |
630 | const struct nlattr **a, bool is_mask, |
631 | bool log) | |
e6445719 | 632 | { |
971427f3 AZ |
633 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
634 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
635 | ||
636 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
637 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
638 | } | |
639 | ||
640 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
641 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
642 | ||
643 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
644 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
645 | } | |
646 | ||
e6445719 PS |
647 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
648 | SW_FLOW_KEY_PUT(match, phy.priority, | |
649 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
650 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
651 | } | |
652 | ||
653 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
654 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
655 | ||
426cda5c | 656 | if (is_mask) { |
e6445719 | 657 | in_port = 0xffffffff; /* Always exact match in_port. */ |
426cda5c | 658 | } else if (in_port >= DP_MAX_PORTS) { |
05da5898 | 659 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
426cda5c | 660 | in_port, DP_MAX_PORTS); |
e6445719 | 661 | return -EINVAL; |
426cda5c | 662 | } |
e6445719 PS |
663 | |
664 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
665 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
666 | } else if (!is_mask) { | |
667 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
668 | } | |
669 | ||
670 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
671 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
672 | ||
673 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
674 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
675 | } | |
676 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
677 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
05da5898 | 678 | is_mask, log)) |
e6445719 PS |
679 | return -EINVAL; |
680 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
23dabf88 | 685 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
05da5898 JR |
686 | const struct nlattr **a, bool is_mask, |
687 | bool log) | |
e6445719 PS |
688 | { |
689 | int err; | |
e6445719 | 690 | |
05da5898 | 691 | err = metadata_from_nlattrs(match, &attrs, a, is_mask, log); |
e6445719 PS |
692 | if (err) |
693 | return err; | |
694 | ||
695 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
696 | const struct ovs_key_ethernet *eth_key; | |
697 | ||
698 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
699 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
700 | eth_key->eth_src, ETH_ALEN, is_mask); | |
701 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
702 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
703 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
704 | } | |
705 | ||
706 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
707 | __be16 tci; | |
708 | ||
709 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
710 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
711 | if (is_mask) | |
05da5898 | 712 | OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit."); |
e6445719 | 713 | else |
05da5898 | 714 | OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set."); |
e6445719 PS |
715 | |
716 | return -EINVAL; | |
717 | } | |
718 | ||
719 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
720 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
a85311bf | 721 | } |
e6445719 PS |
722 | |
723 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
724 | __be16 eth_type; | |
725 | ||
726 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
727 | if (is_mask) { | |
728 | /* Always exact match EtherType. */ | |
729 | eth_type = htons(0xffff); | |
730 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
05da5898 JR |
731 | OVS_NLERR(log, "EtherType %x is less than min %x", |
732 | ntohs(eth_type), ETH_P_802_3_MIN); | |
e6445719 PS |
733 | return -EINVAL; |
734 | } | |
735 | ||
736 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
737 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
738 | } else if (!is_mask) { | |
739 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
740 | } | |
741 | ||
742 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
743 | const struct ovs_key_ipv4 *ipv4_key; | |
744 | ||
745 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
746 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
747 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
748 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
749 | return -EINVAL; |
750 | } | |
751 | SW_FLOW_KEY_PUT(match, ip.proto, | |
752 | ipv4_key->ipv4_proto, is_mask); | |
753 | SW_FLOW_KEY_PUT(match, ip.tos, | |
754 | ipv4_key->ipv4_tos, is_mask); | |
755 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
756 | ipv4_key->ipv4_ttl, is_mask); | |
757 | SW_FLOW_KEY_PUT(match, ip.frag, | |
758 | ipv4_key->ipv4_frag, is_mask); | |
759 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
760 | ipv4_key->ipv4_src, is_mask); | |
761 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
762 | ipv4_key->ipv4_dst, is_mask); | |
763 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
764 | } | |
765 | ||
766 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
767 | const struct ovs_key_ipv6 *ipv6_key; | |
768 | ||
769 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
770 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
771 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
772 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
773 | return -EINVAL; |
774 | } | |
775 | SW_FLOW_KEY_PUT(match, ipv6.label, | |
776 | ipv6_key->ipv6_label, is_mask); | |
777 | SW_FLOW_KEY_PUT(match, ip.proto, | |
778 | ipv6_key->ipv6_proto, is_mask); | |
779 | SW_FLOW_KEY_PUT(match, ip.tos, | |
780 | ipv6_key->ipv6_tclass, is_mask); | |
781 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
782 | ipv6_key->ipv6_hlimit, is_mask); | |
783 | SW_FLOW_KEY_PUT(match, ip.frag, | |
784 | ipv6_key->ipv6_frag, is_mask); | |
785 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
786 | ipv6_key->ipv6_src, | |
787 | sizeof(match->key->ipv6.addr.src), | |
788 | is_mask); | |
789 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
790 | ipv6_key->ipv6_dst, | |
791 | sizeof(match->key->ipv6.addr.dst), | |
792 | is_mask); | |
793 | ||
794 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
795 | } | |
796 | ||
797 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
798 | const struct ovs_key_arp *arp_key; | |
799 | ||
800 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
801 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
05da5898 | 802 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
e6445719 PS |
803 | arp_key->arp_op); |
804 | return -EINVAL; | |
805 | } | |
806 | ||
807 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
808 | arp_key->arp_sip, is_mask); | |
809 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
810 | arp_key->arp_tip, is_mask); | |
811 | SW_FLOW_KEY_PUT(match, ip.proto, | |
812 | ntohs(arp_key->arp_op), is_mask); | |
813 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
814 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
815 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
816 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
817 | ||
818 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
819 | } | |
820 | ||
25cd9ba0 SH |
821 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { |
822 | const struct ovs_key_mpls *mpls_key; | |
823 | ||
824 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
825 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
826 | mpls_key->mpls_lse, is_mask); | |
827 | ||
828 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
829 | } | |
830 | ||
e6445719 PS |
831 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
832 | const struct ovs_key_tcp *tcp_key; | |
833 | ||
834 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
835 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
836 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
837 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
838 | } | |
839 | ||
5eb26b15 | 840 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
1b760fb9 JS |
841 | SW_FLOW_KEY_PUT(match, tp.flags, |
842 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
843 | is_mask); | |
5eb26b15 JR |
844 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
845 | } | |
846 | ||
e6445719 PS |
847 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
848 | const struct ovs_key_udp *udp_key; | |
849 | ||
850 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
851 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
852 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
853 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
854 | } | |
855 | ||
856 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
857 | const struct ovs_key_sctp *sctp_key; | |
858 | ||
859 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
860 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
861 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
862 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
863 | } | |
864 | ||
865 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
866 | const struct ovs_key_icmp *icmp_key; | |
867 | ||
868 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 869 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 870 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 871 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
872 | htons(icmp_key->icmp_code), is_mask); |
873 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
874 | } | |
875 | ||
876 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
877 | const struct ovs_key_icmpv6 *icmpv6_key; | |
878 | ||
879 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 880 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 881 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 882 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
883 | htons(icmpv6_key->icmpv6_code), is_mask); |
884 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
885 | } | |
886 | ||
887 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
888 | const struct ovs_key_nd *nd_key; | |
889 | ||
890 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
891 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
892 | nd_key->nd_target, | |
893 | sizeof(match->key->ipv6.nd.target), | |
894 | is_mask); | |
895 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
896 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
897 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
898 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
899 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
900 | } | |
901 | ||
426cda5c | 902 | if (attrs != 0) { |
05da5898 | 903 | OVS_NLERR(log, "Unknown key attributes %llx", |
426cda5c | 904 | (unsigned long long)attrs); |
e6445719 | 905 | return -EINVAL; |
426cda5c | 906 | } |
e6445719 PS |
907 | |
908 | return 0; | |
909 | } | |
910 | ||
f47de068 | 911 | static void nlattr_set(struct nlattr *attr, u8 val, bool is_attr_mask_key) |
e6445719 | 912 | { |
f47de068 PS |
913 | struct nlattr *nla; |
914 | int rem; | |
e6445719 | 915 | |
f47de068 PS |
916 | /* The nlattr stream should already have been validated */ |
917 | nla_for_each_nested(nla, attr, rem) { | |
918 | /* We assume that ovs_key_lens[type] == -1 means that type is a | |
919 | * nested attribute | |
920 | */ | |
921 | if (is_attr_mask_key && ovs_key_lens[nla_type(nla)] == -1) | |
922 | nlattr_set(nla, val, false); | |
923 | else | |
924 | memset(nla_data(nla), val, nla_len(nla)); | |
925 | } | |
926 | } | |
927 | ||
928 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
929 | { | |
930 | nlattr_set(attr, val, true); | |
e6445719 PS |
931 | } |
932 | ||
933 | /** | |
934 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
935 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
936 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
937 | * does not include any don't care bit. | |
938 | * @match: receives the extracted flow match information. | |
939 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
940 | * sequence. The fields should of the packet that triggered the creation | |
941 | * of this flow. | |
942 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
943 | * attribute specifies the mask field of the wildcarded flow. | |
05da5898 JR |
944 | * @log: Boolean to allow kernel error logging. Normally true, but when |
945 | * probing for feature compatibility this should be passed in as false to | |
946 | * suppress unnecessary error logging. | |
e6445719 PS |
947 | */ |
948 | int ovs_nla_get_match(struct sw_flow_match *match, | |
a85311bf | 949 | const struct nlattr *nla_key, |
05da5898 JR |
950 | const struct nlattr *nla_mask, |
951 | bool log) | |
e6445719 PS |
952 | { |
953 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
954 | const struct nlattr *encap; | |
f47de068 | 955 | struct nlattr *newmask = NULL; |
e6445719 PS |
956 | u64 key_attrs = 0; |
957 | u64 mask_attrs = 0; | |
958 | bool encap_valid = false; | |
959 | int err; | |
960 | ||
05da5898 | 961 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
e6445719 PS |
962 | if (err) |
963 | return err; | |
964 | ||
965 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
966 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
967 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
968 | __be16 tci; | |
969 | ||
970 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
971 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
05da5898 | 972 | OVS_NLERR(log, "Invalid Vlan frame."); |
e6445719 PS |
973 | return -EINVAL; |
974 | } | |
975 | ||
976 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
977 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
978 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
979 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
980 | encap_valid = true; | |
981 | ||
982 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
05da5898 | 983 | err = parse_flow_nlattrs(encap, a, &key_attrs, log); |
e6445719 PS |
984 | if (err) |
985 | return err; | |
986 | } else if (!tci) { | |
987 | /* Corner case for truncated 802.1Q header. */ | |
988 | if (nla_len(encap)) { | |
05da5898 | 989 | OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute."); |
e6445719 PS |
990 | return -EINVAL; |
991 | } | |
992 | } else { | |
05da5898 | 993 | OVS_NLERR(log, "Encap attr is set for non-VLAN frame"); |
e6445719 PS |
994 | return -EINVAL; |
995 | } | |
996 | } | |
997 | ||
05da5898 | 998 | err = ovs_key_from_nlattrs(match, key_attrs, a, false, log); |
e6445719 PS |
999 | if (err) |
1000 | return err; | |
1001 | ||
a85311bf PS |
1002 | if (match->mask) { |
1003 | if (!nla_mask) { | |
1004 | /* Create an exact match mask. We need to set to 0xff | |
1005 | * all the 'match->mask' fields that have been touched | |
1006 | * in 'match->key'. We cannot simply memset | |
1007 | * 'match->mask', because padding bytes and fields not | |
1008 | * specified in 'match->key' should be left to 0. | |
1009 | * Instead, we use a stream of netlink attributes, | |
1010 | * copied from 'key' and set to 0xff. | |
1011 | * ovs_key_from_nlattrs() will take care of filling | |
1012 | * 'match->mask' appropriately. | |
1013 | */ | |
1014 | newmask = kmemdup(nla_key, | |
1015 | nla_total_size(nla_len(nla_key)), | |
1016 | GFP_KERNEL); | |
1017 | if (!newmask) | |
1018 | return -ENOMEM; | |
f47de068 | 1019 | |
a85311bf | 1020 | mask_set_nlattr(newmask, 0xff); |
f47de068 | 1021 | |
a85311bf PS |
1022 | /* The userspace does not send tunnel attributes that |
1023 | * are 0, but we should not wildcard them nonetheless. | |
1024 | */ | |
1025 | if (match->key->tun_key.ipv4_dst) | |
1026 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, | |
1027 | 0xff, true); | |
f47de068 | 1028 | |
a85311bf PS |
1029 | nla_mask = newmask; |
1030 | } | |
f47de068 | 1031 | |
05da5898 | 1032 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
e6445719 | 1033 | if (err) |
f47de068 | 1034 | goto free_newmask; |
e6445719 | 1035 | |
a85311bf PS |
1036 | /* Always match on tci. */ |
1037 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
1038 | ||
f47de068 | 1039 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { |
e6445719 PS |
1040 | __be16 eth_type = 0; |
1041 | __be16 tci = 0; | |
1042 | ||
1043 | if (!encap_valid) { | |
05da5898 | 1044 | OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame."); |
f47de068 PS |
1045 | err = -EINVAL; |
1046 | goto free_newmask; | |
e6445719 PS |
1047 | } |
1048 | ||
1049 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1050 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1051 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1052 | ||
1053 | if (eth_type == htons(0xffff)) { | |
1054 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1055 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
05da5898 JR |
1056 | err = parse_flow_mask_nlattrs(encap, a, |
1057 | &mask_attrs, log); | |
f47de068 PS |
1058 | if (err) |
1059 | goto free_newmask; | |
e6445719 | 1060 | } else { |
05da5898 JR |
1061 | OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).", |
1062 | ntohs(eth_type)); | |
f47de068 PS |
1063 | err = -EINVAL; |
1064 | goto free_newmask; | |
e6445719 PS |
1065 | } |
1066 | ||
1067 | if (a[OVS_KEY_ATTR_VLAN]) | |
1068 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1069 | ||
1070 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
05da5898 JR |
1071 | OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).", |
1072 | ntohs(tci)); | |
f47de068 PS |
1073 | err = -EINVAL; |
1074 | goto free_newmask; | |
e6445719 PS |
1075 | } |
1076 | } | |
1077 | ||
05da5898 | 1078 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true, log); |
e6445719 | 1079 | if (err) |
f47de068 | 1080 | goto free_newmask; |
e6445719 PS |
1081 | } |
1082 | ||
05da5898 | 1083 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
f47de068 | 1084 | err = -EINVAL; |
e6445719 | 1085 | |
f47de068 PS |
1086 | free_newmask: |
1087 | kfree(newmask); | |
1088 | return err; | |
e6445719 PS |
1089 | } |
1090 | ||
1091 | /** | |
1092 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 1093 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
1094 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1095 | * sequence. | |
05da5898 JR |
1096 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1097 | * probing for feature compatibility this should be passed in as false to | |
1098 | * suppress unnecessary error logging. | |
e6445719 PS |
1099 | * |
1100 | * This parses a series of Netlink attributes that form a flow key, which must | |
1101 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1102 | * get the metadata, that is, the parts of the flow key that cannot be | |
1103 | * extracted from the packet itself. | |
1104 | */ | |
1105 | ||
83c8df26 | 1106 | int ovs_nla_get_flow_metadata(const struct nlattr *attr, |
05da5898 JR |
1107 | struct sw_flow_key *key, |
1108 | bool log) | |
e6445719 | 1109 | { |
e6445719 | 1110 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 1111 | struct sw_flow_match match; |
e6445719 PS |
1112 | u64 attrs = 0; |
1113 | int err; | |
e6445719 | 1114 | |
05da5898 | 1115 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
e6445719 PS |
1116 | if (err) |
1117 | return -EINVAL; | |
1118 | ||
1119 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 1120 | match.key = key; |
e6445719 | 1121 | |
83c8df26 | 1122 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 1123 | |
05da5898 | 1124 | return metadata_from_nlattrs(&match, &attrs, a, false, log); |
e6445719 PS |
1125 | } |
1126 | ||
1127 | int ovs_nla_put_flow(const struct sw_flow_key *swkey, | |
1128 | const struct sw_flow_key *output, struct sk_buff *skb) | |
1129 | { | |
1130 | struct ovs_key_ethernet *eth_key; | |
1131 | struct nlattr *nla, *encap; | |
1132 | bool is_mask = (swkey != output); | |
1133 | ||
971427f3 AZ |
1134 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
1135 | goto nla_put_failure; | |
1136 | ||
1137 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1138 | goto nla_put_failure; | |
1139 | ||
e6445719 PS |
1140 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1141 | goto nla_put_failure; | |
1142 | ||
f5796684 JG |
1143 | if ((swkey->tun_key.ipv4_dst || is_mask)) { |
1144 | const struct geneve_opt *opts = NULL; | |
1145 | ||
1146 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
1147 | opts = GENEVE_OPTS(output, swkey->tun_opts_len); | |
1148 | ||
1149 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, | |
1150 | swkey->tun_opts_len)) | |
1151 | goto nla_put_failure; | |
1152 | } | |
e6445719 PS |
1153 | |
1154 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1155 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1156 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1157 | goto nla_put_failure; | |
1158 | } else { | |
1159 | u16 upper_u16; | |
1160 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1161 | ||
1162 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1163 | (upper_u16 << 16) | output->phy.in_port)) | |
1164 | goto nla_put_failure; | |
1165 | } | |
1166 | ||
1167 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1168 | goto nla_put_failure; | |
1169 | ||
1170 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); | |
1171 | if (!nla) | |
1172 | goto nla_put_failure; | |
1173 | ||
1174 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1175 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1176 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 PS |
1177 | |
1178 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1179 | __be16 eth_type; | |
1180 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1181 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1182 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1183 | goto nla_put_failure; | |
1184 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1185 | if (!swkey->eth.tci) | |
1186 | goto unencap; | |
1187 | } else | |
1188 | encap = NULL; | |
1189 | ||
1190 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1191 | /* | |
1192 | * Ethertype 802.2 is represented in the netlink with omitted | |
1193 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1194 | * 0xffff in the mask attribute. Ethertype can also | |
1195 | * be wildcarded. | |
1196 | */ | |
1197 | if (is_mask && output->eth.type) | |
1198 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1199 | output->eth.type)) | |
1200 | goto nla_put_failure; | |
1201 | goto unencap; | |
1202 | } | |
1203 | ||
1204 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1205 | goto nla_put_failure; | |
1206 | ||
1207 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1208 | struct ovs_key_ipv4 *ipv4_key; | |
1209 | ||
1210 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1211 | if (!nla) | |
1212 | goto nla_put_failure; | |
1213 | ipv4_key = nla_data(nla); | |
1214 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1215 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1216 | ipv4_key->ipv4_proto = output->ip.proto; | |
1217 | ipv4_key->ipv4_tos = output->ip.tos; | |
1218 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1219 | ipv4_key->ipv4_frag = output->ip.frag; | |
1220 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1221 | struct ovs_key_ipv6 *ipv6_key; | |
1222 | ||
1223 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1224 | if (!nla) | |
1225 | goto nla_put_failure; | |
1226 | ipv6_key = nla_data(nla); | |
1227 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1228 | sizeof(ipv6_key->ipv6_src)); | |
1229 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1230 | sizeof(ipv6_key->ipv6_dst)); | |
1231 | ipv6_key->ipv6_label = output->ipv6.label; | |
1232 | ipv6_key->ipv6_proto = output->ip.proto; | |
1233 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1234 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1235 | ipv6_key->ipv6_frag = output->ip.frag; | |
1236 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1237 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1238 | struct ovs_key_arp *arp_key; | |
1239 | ||
1240 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1241 | if (!nla) | |
1242 | goto nla_put_failure; | |
1243 | arp_key = nla_data(nla); | |
1244 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1245 | arp_key->arp_sip = output->ipv4.addr.src; | |
1246 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1247 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1248 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1249 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
25cd9ba0 SH |
1250 | } else if (eth_p_mpls(swkey->eth.type)) { |
1251 | struct ovs_key_mpls *mpls_key; | |
1252 | ||
1253 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1254 | if (!nla) | |
1255 | goto nla_put_failure; | |
1256 | mpls_key = nla_data(nla); | |
1257 | mpls_key->mpls_lse = output->mpls.top_lse; | |
e6445719 PS |
1258 | } |
1259 | ||
1260 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1261 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1262 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1263 | ||
1264 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1265 | struct ovs_key_tcp *tcp_key; | |
1266 | ||
1267 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1268 | if (!nla) | |
1269 | goto nla_put_failure; | |
1270 | tcp_key = nla_data(nla); | |
1139e241 JR |
1271 | tcp_key->tcp_src = output->tp.src; |
1272 | tcp_key->tcp_dst = output->tp.dst; | |
1273 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1274 | output->tp.flags)) | |
1275 | goto nla_put_failure; | |
e6445719 PS |
1276 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1277 | struct ovs_key_udp *udp_key; | |
1278 | ||
1279 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1280 | if (!nla) | |
1281 | goto nla_put_failure; | |
1282 | udp_key = nla_data(nla); | |
1139e241 JR |
1283 | udp_key->udp_src = output->tp.src; |
1284 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1285 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1286 | struct ovs_key_sctp *sctp_key; | |
1287 | ||
1288 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1289 | if (!nla) | |
1290 | goto nla_put_failure; | |
1291 | sctp_key = nla_data(nla); | |
1139e241 JR |
1292 | sctp_key->sctp_src = output->tp.src; |
1293 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1294 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1295 | swkey->ip.proto == IPPROTO_ICMP) { | |
1296 | struct ovs_key_icmp *icmp_key; | |
1297 | ||
1298 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1299 | if (!nla) | |
1300 | goto nla_put_failure; | |
1301 | icmp_key = nla_data(nla); | |
1139e241 JR |
1302 | icmp_key->icmp_type = ntohs(output->tp.src); |
1303 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1304 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1305 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1306 | struct ovs_key_icmpv6 *icmpv6_key; | |
1307 | ||
1308 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1309 | sizeof(*icmpv6_key)); | |
1310 | if (!nla) | |
1311 | goto nla_put_failure; | |
1312 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1313 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1314 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1315 | |
1316 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1317 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1318 | struct ovs_key_nd *nd_key; | |
1319 | ||
1320 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1321 | if (!nla) | |
1322 | goto nla_put_failure; | |
1323 | nd_key = nla_data(nla); | |
1324 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1325 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1326 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1327 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1328 | } |
1329 | } | |
1330 | } | |
1331 | ||
1332 | unencap: | |
1333 | if (encap) | |
1334 | nla_nest_end(skb, encap); | |
1335 | ||
1336 | return 0; | |
1337 | ||
1338 | nla_put_failure: | |
1339 | return -EMSGSIZE; | |
1340 | } | |
1341 | ||
1342 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) | |
1343 | ||
05da5898 | 1344 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
e6445719 PS |
1345 | { |
1346 | struct sw_flow_actions *sfa; | |
1347 | ||
426cda5c | 1348 | if (size > MAX_ACTIONS_BUFSIZE) { |
05da5898 | 1349 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
e6445719 | 1350 | return ERR_PTR(-EINVAL); |
426cda5c | 1351 | } |
e6445719 PS |
1352 | |
1353 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1354 | if (!sfa) | |
1355 | return ERR_PTR(-ENOMEM); | |
1356 | ||
1357 | sfa->actions_len = 0; | |
1358 | return sfa; | |
1359 | } | |
1360 | ||
e6445719 PS |
1361 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1362 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
1363 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1364 | { | |
11d6c461 | 1365 | kfree_rcu(sf_acts, rcu); |
e6445719 PS |
1366 | } |
1367 | ||
1368 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
05da5898 | 1369 | int attr_len, bool log) |
e6445719 PS |
1370 | { |
1371 | ||
1372 | struct sw_flow_actions *acts; | |
1373 | int new_acts_size; | |
1374 | int req_size = NLA_ALIGN(attr_len); | |
1375 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1376 | (*sfa)->actions_len; | |
1377 | ||
1378 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1379 | goto out; | |
1380 | ||
1381 | new_acts_size = ksize(*sfa) * 2; | |
1382 | ||
1383 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1384 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1385 | return ERR_PTR(-EMSGSIZE); | |
1386 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1387 | } | |
1388 | ||
05da5898 | 1389 | acts = nla_alloc_flow_actions(new_acts_size, log); |
e6445719 PS |
1390 | if (IS_ERR(acts)) |
1391 | return (void *)acts; | |
1392 | ||
1393 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1394 | acts->actions_len = (*sfa)->actions_len; | |
1395 | kfree(*sfa); | |
1396 | *sfa = acts; | |
1397 | ||
1398 | out: | |
1399 | (*sfa)->actions_len += req_size; | |
1400 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1401 | } | |
1402 | ||
f0b128c1 | 1403 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
05da5898 | 1404 | int attrtype, void *data, int len, bool log) |
e6445719 PS |
1405 | { |
1406 | struct nlattr *a; | |
1407 | ||
05da5898 | 1408 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
e6445719 | 1409 | if (IS_ERR(a)) |
f0b128c1 | 1410 | return a; |
e6445719 PS |
1411 | |
1412 | a->nla_type = attrtype; | |
1413 | a->nla_len = nla_attr_size(len); | |
1414 | ||
1415 | if (data) | |
1416 | memcpy(nla_data(a), data, len); | |
1417 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1418 | ||
f0b128c1 JG |
1419 | return a; |
1420 | } | |
1421 | ||
1422 | static int add_action(struct sw_flow_actions **sfa, int attrtype, | |
05da5898 | 1423 | void *data, int len, bool log) |
f0b128c1 JG |
1424 | { |
1425 | struct nlattr *a; | |
1426 | ||
05da5898 | 1427 | a = __add_action(sfa, attrtype, data, len, log); |
f0b128c1 JG |
1428 | if (IS_ERR(a)) |
1429 | return PTR_ERR(a); | |
1430 | ||
e6445719 PS |
1431 | return 0; |
1432 | } | |
1433 | ||
1434 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
05da5898 | 1435 | int attrtype, bool log) |
e6445719 PS |
1436 | { |
1437 | int used = (*sfa)->actions_len; | |
1438 | int err; | |
1439 | ||
05da5898 | 1440 | err = add_action(sfa, attrtype, NULL, 0, log); |
e6445719 PS |
1441 | if (err) |
1442 | return err; | |
1443 | ||
1444 | return used; | |
1445 | } | |
1446 | ||
1447 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1448 | int st_offset) | |
1449 | { | |
1450 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1451 | st_offset); | |
1452 | ||
1453 | a->nla_len = sfa->actions_len - st_offset; | |
1454 | } | |
1455 | ||
2fdb957d | 1456 | static int __ovs_nla_copy_actions(const struct nlattr *attr, |
25cd9ba0 SH |
1457 | const struct sw_flow_key *key, |
1458 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1459 | __be16 eth_type, __be16 vlan_tci, bool log); |
25cd9ba0 | 1460 | |
e6445719 PS |
1461 | static int validate_and_copy_sample(const struct nlattr *attr, |
1462 | const struct sw_flow_key *key, int depth, | |
25cd9ba0 | 1463 | struct sw_flow_actions **sfa, |
05da5898 | 1464 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1465 | { |
1466 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1467 | const struct nlattr *probability, *actions; | |
1468 | const struct nlattr *a; | |
1469 | int rem, start, err, st_acts; | |
1470 | ||
1471 | memset(attrs, 0, sizeof(attrs)); | |
1472 | nla_for_each_nested(a, attr, rem) { | |
1473 | int type = nla_type(a); | |
1474 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1475 | return -EINVAL; | |
1476 | attrs[type] = a; | |
1477 | } | |
1478 | if (rem) | |
1479 | return -EINVAL; | |
1480 | ||
1481 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1482 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1483 | return -EINVAL; | |
1484 | ||
1485 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1486 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1487 | return -EINVAL; | |
1488 | ||
1489 | /* validation done, copy sample action. */ | |
05da5898 | 1490 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
e6445719 PS |
1491 | if (start < 0) |
1492 | return start; | |
1493 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, | |
05da5898 | 1494 | nla_data(probability), sizeof(u32), log); |
e6445719 PS |
1495 | if (err) |
1496 | return err; | |
05da5898 | 1497 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
e6445719 PS |
1498 | if (st_acts < 0) |
1499 | return st_acts; | |
1500 | ||
2fdb957d | 1501 | err = __ovs_nla_copy_actions(actions, key, depth + 1, sfa, |
05da5898 | 1502 | eth_type, vlan_tci, log); |
e6445719 PS |
1503 | if (err) |
1504 | return err; | |
1505 | ||
1506 | add_nested_action_end(*sfa, st_acts); | |
1507 | add_nested_action_end(*sfa, start); | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
25cd9ba0 SH |
1512 | static int validate_tp_port(const struct sw_flow_key *flow_key, |
1513 | __be16 eth_type) | |
e6445719 | 1514 | { |
25cd9ba0 | 1515 | if ((eth_type == htons(ETH_P_IP) || eth_type == htons(ETH_P_IPV6)) && |
1139e241 JR |
1516 | (flow_key->tp.src || flow_key->tp.dst)) |
1517 | return 0; | |
e6445719 PS |
1518 | |
1519 | return -EINVAL; | |
1520 | } | |
1521 | ||
1522 | void ovs_match_init(struct sw_flow_match *match, | |
1523 | struct sw_flow_key *key, | |
1524 | struct sw_flow_mask *mask) | |
1525 | { | |
1526 | memset(match, 0, sizeof(*match)); | |
1527 | match->key = key; | |
1528 | match->mask = mask; | |
1529 | ||
1530 | memset(key, 0, sizeof(*key)); | |
1531 | ||
1532 | if (mask) { | |
1533 | memset(&mask->key, 0, sizeof(mask->key)); | |
1534 | mask->range.start = mask->range.end = 0; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | static int validate_and_copy_set_tun(const struct nlattr *attr, | |
05da5898 | 1539 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1540 | { |
1541 | struct sw_flow_match match; | |
1542 | struct sw_flow_key key; | |
f0b128c1 JG |
1543 | struct ovs_tunnel_info *tun_info; |
1544 | struct nlattr *a; | |
e6445719 PS |
1545 | int err, start; |
1546 | ||
1547 | ovs_match_init(&match, &key, NULL); | |
05da5898 | 1548 | err = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log); |
e6445719 PS |
1549 | if (err) |
1550 | return err; | |
1551 | ||
f5796684 JG |
1552 | if (key.tun_opts_len) { |
1553 | struct geneve_opt *option = GENEVE_OPTS(&key, | |
1554 | key.tun_opts_len); | |
1555 | int opts_len = key.tun_opts_len; | |
1556 | bool crit_opt = false; | |
1557 | ||
1558 | while (opts_len > 0) { | |
1559 | int len; | |
1560 | ||
1561 | if (opts_len < sizeof(*option)) | |
1562 | return -EINVAL; | |
1563 | ||
1564 | len = sizeof(*option) + option->length * 4; | |
1565 | if (len > opts_len) | |
1566 | return -EINVAL; | |
1567 | ||
1568 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1569 | ||
1570 | option = (struct geneve_opt *)((u8 *)option + len); | |
1571 | opts_len -= len; | |
1572 | }; | |
1573 | ||
1574 | key.tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1575 | }; | |
1576 | ||
05da5898 | 1577 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
e6445719 PS |
1578 | if (start < 0) |
1579 | return start; | |
1580 | ||
f0b128c1 | 1581 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
05da5898 | 1582 | sizeof(*tun_info) + key.tun_opts_len, log); |
f0b128c1 JG |
1583 | if (IS_ERR(a)) |
1584 | return PTR_ERR(a); | |
1585 | ||
1586 | tun_info = nla_data(a); | |
1587 | tun_info->tunnel = key.tun_key; | |
f5796684 JG |
1588 | tun_info->options_len = key.tun_opts_len; |
1589 | ||
1590 | if (tun_info->options_len) { | |
1591 | /* We need to store the options in the action itself since | |
1592 | * everything else will go away after flow setup. We can append | |
1593 | * it to tun_info and then point there. | |
1594 | */ | |
1595 | memcpy((tun_info + 1), GENEVE_OPTS(&key, key.tun_opts_len), | |
1596 | key.tun_opts_len); | |
1597 | tun_info->options = (struct geneve_opt *)(tun_info + 1); | |
1598 | } else { | |
1599 | tun_info->options = NULL; | |
1600 | } | |
f0b128c1 | 1601 | |
e6445719 PS |
1602 | add_nested_action_end(*sfa, start); |
1603 | ||
1604 | return err; | |
1605 | } | |
1606 | ||
1607 | static int validate_set(const struct nlattr *a, | |
1608 | const struct sw_flow_key *flow_key, | |
1609 | struct sw_flow_actions **sfa, | |
05da5898 | 1610 | bool *set_tun, __be16 eth_type, bool log) |
e6445719 PS |
1611 | { |
1612 | const struct nlattr *ovs_key = nla_data(a); | |
1613 | int key_type = nla_type(ovs_key); | |
1614 | ||
1615 | /* There can be only one key in a action */ | |
1616 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
1617 | return -EINVAL; | |
1618 | ||
1619 | if (key_type > OVS_KEY_ATTR_MAX || | |
1620 | (ovs_key_lens[key_type] != nla_len(ovs_key) && | |
1621 | ovs_key_lens[key_type] != -1)) | |
1622 | return -EINVAL; | |
1623 | ||
1624 | switch (key_type) { | |
1625 | const struct ovs_key_ipv4 *ipv4_key; | |
1626 | const struct ovs_key_ipv6 *ipv6_key; | |
1627 | int err; | |
1628 | ||
1629 | case OVS_KEY_ATTR_PRIORITY: | |
1630 | case OVS_KEY_ATTR_SKB_MARK: | |
1631 | case OVS_KEY_ATTR_ETHERNET: | |
1632 | break; | |
1633 | ||
1634 | case OVS_KEY_ATTR_TUNNEL: | |
25cd9ba0 SH |
1635 | if (eth_p_mpls(eth_type)) |
1636 | return -EINVAL; | |
1637 | ||
e6445719 | 1638 | *set_tun = true; |
05da5898 | 1639 | err = validate_and_copy_set_tun(a, sfa, log); |
e6445719 PS |
1640 | if (err) |
1641 | return err; | |
1642 | break; | |
1643 | ||
1644 | case OVS_KEY_ATTR_IPV4: | |
25cd9ba0 | 1645 | if (eth_type != htons(ETH_P_IP)) |
e6445719 PS |
1646 | return -EINVAL; |
1647 | ||
1648 | if (!flow_key->ip.proto) | |
1649 | return -EINVAL; | |
1650 | ||
1651 | ipv4_key = nla_data(ovs_key); | |
1652 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
1653 | return -EINVAL; | |
1654 | ||
1655 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
1656 | return -EINVAL; | |
1657 | ||
1658 | break; | |
1659 | ||
1660 | case OVS_KEY_ATTR_IPV6: | |
25cd9ba0 | 1661 | if (eth_type != htons(ETH_P_IPV6)) |
e6445719 PS |
1662 | return -EINVAL; |
1663 | ||
1664 | if (!flow_key->ip.proto) | |
1665 | return -EINVAL; | |
1666 | ||
1667 | ipv6_key = nla_data(ovs_key); | |
1668 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
1669 | return -EINVAL; | |
1670 | ||
1671 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
1675 | return -EINVAL; | |
1676 | ||
1677 | break; | |
1678 | ||
1679 | case OVS_KEY_ATTR_TCP: | |
1680 | if (flow_key->ip.proto != IPPROTO_TCP) | |
1681 | return -EINVAL; | |
1682 | ||
25cd9ba0 | 1683 | return validate_tp_port(flow_key, eth_type); |
e6445719 PS |
1684 | |
1685 | case OVS_KEY_ATTR_UDP: | |
1686 | if (flow_key->ip.proto != IPPROTO_UDP) | |
1687 | return -EINVAL; | |
1688 | ||
25cd9ba0 SH |
1689 | return validate_tp_port(flow_key, eth_type); |
1690 | ||
1691 | case OVS_KEY_ATTR_MPLS: | |
1692 | if (!eth_p_mpls(eth_type)) | |
1693 | return -EINVAL; | |
1694 | break; | |
e6445719 PS |
1695 | |
1696 | case OVS_KEY_ATTR_SCTP: | |
1697 | if (flow_key->ip.proto != IPPROTO_SCTP) | |
1698 | return -EINVAL; | |
1699 | ||
25cd9ba0 | 1700 | return validate_tp_port(flow_key, eth_type); |
e6445719 PS |
1701 | |
1702 | default: | |
1703 | return -EINVAL; | |
1704 | } | |
1705 | ||
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | static int validate_userspace(const struct nlattr *attr) | |
1710 | { | |
1711 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
1712 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
1713 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8f0aad6f | 1714 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
e6445719 PS |
1715 | }; |
1716 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
1717 | int error; | |
1718 | ||
1719 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
1720 | attr, userspace_policy); | |
1721 | if (error) | |
1722 | return error; | |
1723 | ||
1724 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
1725 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
1726 | return -EINVAL; | |
1727 | ||
1728 | return 0; | |
1729 | } | |
1730 | ||
1731 | static int copy_action(const struct nlattr *from, | |
05da5898 | 1732 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1733 | { |
1734 | int totlen = NLA_ALIGN(from->nla_len); | |
1735 | struct nlattr *to; | |
1736 | ||
05da5898 | 1737 | to = reserve_sfa_size(sfa, from->nla_len, log); |
e6445719 PS |
1738 | if (IS_ERR(to)) |
1739 | return PTR_ERR(to); | |
1740 | ||
1741 | memcpy(to, from, totlen); | |
1742 | return 0; | |
1743 | } | |
1744 | ||
2fdb957d | 1745 | static int __ovs_nla_copy_actions(const struct nlattr *attr, |
25cd9ba0 SH |
1746 | const struct sw_flow_key *key, |
1747 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1748 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1749 | { |
1750 | const struct nlattr *a; | |
25cd9ba0 | 1751 | bool out_tnl_port = false; |
e6445719 PS |
1752 | int rem, err; |
1753 | ||
1754 | if (depth >= SAMPLE_ACTION_DEPTH) | |
1755 | return -EOVERFLOW; | |
1756 | ||
1757 | nla_for_each_nested(a, attr, rem) { | |
1758 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
1759 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
1760 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 1761 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 | 1762 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
25cd9ba0 SH |
1763 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
1764 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
e6445719 PS |
1765 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
1766 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
1767 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
971427f3 AZ |
1768 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
1769 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash) | |
e6445719 PS |
1770 | }; |
1771 | const struct ovs_action_push_vlan *vlan; | |
1772 | int type = nla_type(a); | |
1773 | bool skip_copy; | |
1774 | ||
1775 | if (type > OVS_ACTION_ATTR_MAX || | |
1776 | (action_lens[type] != nla_len(a) && | |
1777 | action_lens[type] != (u32)-1)) | |
1778 | return -EINVAL; | |
1779 | ||
1780 | skip_copy = false; | |
1781 | switch (type) { | |
1782 | case OVS_ACTION_ATTR_UNSPEC: | |
1783 | return -EINVAL; | |
1784 | ||
1785 | case OVS_ACTION_ATTR_USERSPACE: | |
1786 | err = validate_userspace(a); | |
1787 | if (err) | |
1788 | return err; | |
1789 | break; | |
1790 | ||
1791 | case OVS_ACTION_ATTR_OUTPUT: | |
1792 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
1793 | return -EINVAL; | |
25cd9ba0 SH |
1794 | out_tnl_port = false; |
1795 | ||
e6445719 PS |
1796 | break; |
1797 | ||
971427f3 AZ |
1798 | case OVS_ACTION_ATTR_HASH: { |
1799 | const struct ovs_action_hash *act_hash = nla_data(a); | |
1800 | ||
1801 | switch (act_hash->hash_alg) { | |
1802 | case OVS_HASH_ALG_L4: | |
1803 | break; | |
1804 | default: | |
1805 | return -EINVAL; | |
1806 | } | |
1807 | ||
1808 | break; | |
1809 | } | |
e6445719 PS |
1810 | |
1811 | case OVS_ACTION_ATTR_POP_VLAN: | |
25cd9ba0 | 1812 | vlan_tci = htons(0); |
e6445719 PS |
1813 | break; |
1814 | ||
1815 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
1816 | vlan = nla_data(a); | |
1817 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
1818 | return -EINVAL; | |
1819 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
1820 | return -EINVAL; | |
25cd9ba0 | 1821 | vlan_tci = vlan->vlan_tci; |
e6445719 PS |
1822 | break; |
1823 | ||
971427f3 AZ |
1824 | case OVS_ACTION_ATTR_RECIRC: |
1825 | break; | |
1826 | ||
25cd9ba0 SH |
1827 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
1828 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
1829 | ||
1830 | /* Networking stack do not allow simultaneous Tunnel | |
1831 | * and MPLS GSO. | |
1832 | */ | |
1833 | if (out_tnl_port) | |
1834 | return -EINVAL; | |
1835 | ||
1836 | if (!eth_p_mpls(mpls->mpls_ethertype)) | |
1837 | return -EINVAL; | |
1838 | /* Prohibit push MPLS other than to a white list | |
1839 | * for packets that have a known tag order. | |
1840 | */ | |
1841 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
1842 | (eth_type != htons(ETH_P_IP) && | |
1843 | eth_type != htons(ETH_P_IPV6) && | |
1844 | eth_type != htons(ETH_P_ARP) && | |
1845 | eth_type != htons(ETH_P_RARP) && | |
1846 | !eth_p_mpls(eth_type))) | |
1847 | return -EINVAL; | |
1848 | eth_type = mpls->mpls_ethertype; | |
1849 | break; | |
1850 | } | |
1851 | ||
1852 | case OVS_ACTION_ATTR_POP_MPLS: | |
1853 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
1854 | !eth_p_mpls(eth_type)) | |
1855 | return -EINVAL; | |
1856 | ||
1857 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
1858 | * as there is no check here to ensure that the new | |
1859 | * eth_type is valid and thus set actions could | |
1860 | * write off the end of the packet or otherwise | |
1861 | * corrupt it. | |
1862 | * | |
1863 | * Support for these actions is planned using packet | |
1864 | * recirculation. | |
1865 | */ | |
1866 | eth_type = htons(0); | |
1867 | break; | |
1868 | ||
e6445719 | 1869 | case OVS_ACTION_ATTR_SET: |
25cd9ba0 | 1870 | err = validate_set(a, key, sfa, |
05da5898 | 1871 | &out_tnl_port, eth_type, log); |
e6445719 PS |
1872 | if (err) |
1873 | return err; | |
25cd9ba0 SH |
1874 | |
1875 | skip_copy = out_tnl_port; | |
e6445719 PS |
1876 | break; |
1877 | ||
1878 | case OVS_ACTION_ATTR_SAMPLE: | |
25cd9ba0 | 1879 | err = validate_and_copy_sample(a, key, depth, sfa, |
05da5898 | 1880 | eth_type, vlan_tci, log); |
e6445719 PS |
1881 | if (err) |
1882 | return err; | |
1883 | skip_copy = true; | |
1884 | break; | |
1885 | ||
1886 | default: | |
05da5898 | 1887 | OVS_NLERR(log, "Unknown Action type %d", type); |
e6445719 PS |
1888 | return -EINVAL; |
1889 | } | |
1890 | if (!skip_copy) { | |
05da5898 | 1891 | err = copy_action(a, sfa, log); |
e6445719 PS |
1892 | if (err) |
1893 | return err; | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | if (rem > 0) | |
1898 | return -EINVAL; | |
1899 | ||
1900 | return 0; | |
1901 | } | |
1902 | ||
25cd9ba0 SH |
1903 | int ovs_nla_copy_actions(const struct nlattr *attr, |
1904 | const struct sw_flow_key *key, | |
05da5898 | 1905 | struct sw_flow_actions **sfa, bool log) |
25cd9ba0 | 1906 | { |
2fdb957d PS |
1907 | int err; |
1908 | ||
05da5898 | 1909 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
2fdb957d PS |
1910 | if (IS_ERR(*sfa)) |
1911 | return PTR_ERR(*sfa); | |
1912 | ||
1913 | err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, | |
05da5898 | 1914 | key->eth.tci, log); |
2fdb957d PS |
1915 | if (err) |
1916 | kfree(*sfa); | |
1917 | ||
1918 | return err; | |
25cd9ba0 SH |
1919 | } |
1920 | ||
e6445719 PS |
1921 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
1922 | { | |
1923 | const struct nlattr *a; | |
1924 | struct nlattr *start; | |
1925 | int err = 0, rem; | |
1926 | ||
1927 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
1928 | if (!start) | |
1929 | return -EMSGSIZE; | |
1930 | ||
1931 | nla_for_each_nested(a, attr, rem) { | |
1932 | int type = nla_type(a); | |
1933 | struct nlattr *st_sample; | |
1934 | ||
1935 | switch (type) { | |
1936 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
1937 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
1938 | sizeof(u32), nla_data(a))) | |
1939 | return -EMSGSIZE; | |
1940 | break; | |
1941 | case OVS_SAMPLE_ATTR_ACTIONS: | |
1942 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
1943 | if (!st_sample) | |
1944 | return -EMSGSIZE; | |
1945 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
1946 | if (err) | |
1947 | return err; | |
1948 | nla_nest_end(skb, st_sample); | |
1949 | break; | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | nla_nest_end(skb, start); | |
1954 | return err; | |
1955 | } | |
1956 | ||
1957 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
1958 | { | |
1959 | const struct nlattr *ovs_key = nla_data(a); | |
1960 | int key_type = nla_type(ovs_key); | |
1961 | struct nlattr *start; | |
1962 | int err; | |
1963 | ||
1964 | switch (key_type) { | |
f0b128c1 JG |
1965 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
1966 | struct ovs_tunnel_info *tun_info = nla_data(ovs_key); | |
1967 | ||
e6445719 PS |
1968 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
1969 | if (!start) | |
1970 | return -EMSGSIZE; | |
1971 | ||
f0b128c1 | 1972 | err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel, |
f5796684 JG |
1973 | tun_info->options_len ? |
1974 | tun_info->options : NULL, | |
1975 | tun_info->options_len); | |
e6445719 PS |
1976 | if (err) |
1977 | return err; | |
1978 | nla_nest_end(skb, start); | |
1979 | break; | |
f0b128c1 | 1980 | } |
e6445719 PS |
1981 | default: |
1982 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
1983 | return -EMSGSIZE; | |
1984 | break; | |
1985 | } | |
1986 | ||
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) | |
1991 | { | |
1992 | const struct nlattr *a; | |
1993 | int rem, err; | |
1994 | ||
1995 | nla_for_each_attr(a, attr, len, rem) { | |
1996 | int type = nla_type(a); | |
1997 | ||
1998 | switch (type) { | |
1999 | case OVS_ACTION_ATTR_SET: | |
2000 | err = set_action_to_attr(a, skb); | |
2001 | if (err) | |
2002 | return err; | |
2003 | break; | |
2004 | ||
2005 | case OVS_ACTION_ATTR_SAMPLE: | |
2006 | err = sample_action_to_attr(a, skb); | |
2007 | if (err) | |
2008 | return err; | |
2009 | break; | |
2010 | default: | |
2011 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2012 | return -EMSGSIZE; | |
2013 | break; | |
2014 | } | |
2015 | } | |
2016 | ||
2017 | return 0; | |
2018 | } |