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1 | /* | |
2 | * Copyright (c) 2007-2017 Nicira, Inc. | |
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 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
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> | |
45 | #include <net/geneve.h> | |
46 | #include <net/ip.h> | |
47 | #include <net/ipv6.h> | |
48 | #include <net/ndisc.h> | |
49 | #include <net/mpls.h> | |
50 | #include <net/vxlan.h> | |
51 | #include <net/tun_proto.h> | |
52 | #include <net/erspan.h> | |
53 | ||
54 | #include "flow_netlink.h" | |
55 | ||
56 | struct ovs_len_tbl { | |
57 | int len; | |
58 | const struct ovs_len_tbl *next; | |
59 | }; | |
60 | ||
61 | #define OVS_ATTR_NESTED -1 | |
62 | #define OVS_ATTR_VARIABLE -2 | |
63 | ||
64 | static bool actions_may_change_flow(const struct nlattr *actions) | |
65 | { | |
66 | struct nlattr *nla; | |
67 | int rem; | |
68 | ||
69 | nla_for_each_nested(nla, actions, rem) { | |
70 | u16 action = nla_type(nla); | |
71 | ||
72 | switch (action) { | |
73 | case OVS_ACTION_ATTR_OUTPUT: | |
74 | case OVS_ACTION_ATTR_RECIRC: | |
75 | case OVS_ACTION_ATTR_TRUNC: | |
76 | case OVS_ACTION_ATTR_USERSPACE: | |
77 | break; | |
78 | ||
79 | case OVS_ACTION_ATTR_CT: | |
80 | case OVS_ACTION_ATTR_CT_CLEAR: | |
81 | case OVS_ACTION_ATTR_HASH: | |
82 | case OVS_ACTION_ATTR_POP_ETH: | |
83 | case OVS_ACTION_ATTR_POP_MPLS: | |
84 | case OVS_ACTION_ATTR_POP_NSH: | |
85 | case OVS_ACTION_ATTR_POP_VLAN: | |
86 | case OVS_ACTION_ATTR_PUSH_ETH: | |
87 | case OVS_ACTION_ATTR_PUSH_MPLS: | |
88 | case OVS_ACTION_ATTR_PUSH_NSH: | |
89 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
90 | case OVS_ACTION_ATTR_SAMPLE: | |
91 | case OVS_ACTION_ATTR_SET: | |
92 | case OVS_ACTION_ATTR_SET_MASKED: | |
93 | case OVS_ACTION_ATTR_METER: | |
94 | default: | |
95 | return true; | |
96 | } | |
97 | } | |
98 | return false; | |
99 | } | |
100 | ||
101 | static void update_range(struct sw_flow_match *match, | |
102 | size_t offset, size_t size, bool is_mask) | |
103 | { | |
104 | struct sw_flow_key_range *range; | |
105 | size_t start = rounddown(offset, sizeof(long)); | |
106 | size_t end = roundup(offset + size, sizeof(long)); | |
107 | ||
108 | if (!is_mask) | |
109 | range = &match->range; | |
110 | else | |
111 | range = &match->mask->range; | |
112 | ||
113 | if (range->start == range->end) { | |
114 | range->start = start; | |
115 | range->end = end; | |
116 | return; | |
117 | } | |
118 | ||
119 | if (range->start > start) | |
120 | range->start = start; | |
121 | ||
122 | if (range->end < end) | |
123 | range->end = end; | |
124 | } | |
125 | ||
126 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
127 | do { \ | |
128 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
129 | sizeof((match)->key->field), is_mask); \ | |
130 | if (is_mask) \ | |
131 | (match)->mask->key.field = value; \ | |
132 | else \ | |
133 | (match)->key->field = value; \ | |
134 | } while (0) | |
135 | ||
136 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ | |
137 | do { \ | |
138 | update_range(match, offset, len, is_mask); \ | |
139 | if (is_mask) \ | |
140 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
141 | len); \ | |
142 | else \ | |
143 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
144 | } while (0) | |
145 | ||
146 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ | |
147 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
148 | value_p, len, is_mask) | |
149 | ||
150 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ | |
151 | do { \ | |
152 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
153 | sizeof((match)->key->field), is_mask); \ | |
154 | if (is_mask) \ | |
155 | memset((u8 *)&(match)->mask->key.field, value, \ | |
156 | sizeof((match)->mask->key.field)); \ | |
157 | else \ | |
158 | memset((u8 *)&(match)->key->field, value, \ | |
159 | sizeof((match)->key->field)); \ | |
160 | } while (0) | |
161 | ||
162 | static bool match_validate(const struct sw_flow_match *match, | |
163 | u64 key_attrs, u64 mask_attrs, bool log) | |
164 | { | |
165 | u64 key_expected = 0; | |
166 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
167 | ||
168 | /* The following mask attributes allowed only if they | |
169 | * pass the validation tests. */ | |
170 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
171 | | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4) | |
172 | | (1 << OVS_KEY_ATTR_IPV6) | |
173 | | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6) | |
174 | | (1 << OVS_KEY_ATTR_TCP) | |
175 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) | |
176 | | (1 << OVS_KEY_ATTR_UDP) | |
177 | | (1 << OVS_KEY_ATTR_SCTP) | |
178 | | (1 << OVS_KEY_ATTR_ICMP) | |
179 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
180 | | (1 << OVS_KEY_ATTR_ARP) | |
181 | | (1 << OVS_KEY_ATTR_ND) | |
182 | | (1 << OVS_KEY_ATTR_MPLS) | |
183 | | (1 << OVS_KEY_ATTR_NSH)); | |
184 | ||
185 | /* Always allowed mask fields. */ | |
186 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
187 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
188 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
189 | ||
190 | /* Check key attributes. */ | |
191 | if (match->key->eth.type == htons(ETH_P_ARP) | |
192 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
193 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
194 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
195 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; | |
196 | } | |
197 | ||
198 | if (eth_p_mpls(match->key->eth.type)) { | |
199 | key_expected |= 1 << OVS_KEY_ATTR_MPLS; | |
200 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
201 | mask_allowed |= 1 << OVS_KEY_ATTR_MPLS; | |
202 | } | |
203 | ||
204 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
205 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
206 | if (match->mask && match->mask->key.eth.type == htons(0xffff)) { | |
207 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
208 | mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4; | |
209 | } | |
210 | ||
211 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
212 | if (match->key->ip.proto == IPPROTO_UDP) { | |
213 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
214 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
215 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
216 | } | |
217 | ||
218 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
219 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
220 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
221 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
222 | } | |
223 | ||
224 | if (match->key->ip.proto == IPPROTO_TCP) { | |
225 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
226 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; | |
227 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
228 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; | |
229 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; | |
230 | } | |
231 | } | |
232 | ||
233 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
234 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
235 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
236 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
237 | } | |
238 | } | |
239 | } | |
240 | ||
241 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
242 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
243 | if (match->mask && match->mask->key.eth.type == htons(0xffff)) { | |
244 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
245 | mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6; | |
246 | } | |
247 | ||
248 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
249 | if (match->key->ip.proto == IPPROTO_UDP) { | |
250 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
251 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
252 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
253 | } | |
254 | ||
255 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
256 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
257 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
258 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
259 | } | |
260 | ||
261 | if (match->key->ip.proto == IPPROTO_TCP) { | |
262 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
263 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; | |
264 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
265 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; | |
266 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; | |
267 | } | |
268 | } | |
269 | ||
270 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
271 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
272 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
273 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
274 | ||
275 | if (match->key->tp.src == | |
276 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
277 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
278 | key_expected |= 1 << OVS_KEY_ATTR_ND; | |
279 | /* Original direction conntrack tuple | |
280 | * uses the same space as the ND fields | |
281 | * in the key, so both are not allowed | |
282 | * at the same time. | |
283 | */ | |
284 | mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6); | |
285 | if (match->mask && (match->mask->key.tp.src == htons(0xff))) | |
286 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; | |
287 | } | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
292 | if (match->key->eth.type == htons(ETH_P_NSH)) { | |
293 | key_expected |= 1 << OVS_KEY_ATTR_NSH; | |
294 | if (match->mask && | |
295 | match->mask->key.eth.type == htons(0xffff)) { | |
296 | mask_allowed |= 1 << OVS_KEY_ATTR_NSH; | |
297 | } | |
298 | } | |
299 | ||
300 | if ((key_attrs & key_expected) != key_expected) { | |
301 | /* Key attributes check failed. */ | |
302 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", | |
303 | (unsigned long long)key_attrs, | |
304 | (unsigned long long)key_expected); | |
305 | return false; | |
306 | } | |
307 | ||
308 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
309 | /* Mask attributes check failed. */ | |
310 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", | |
311 | (unsigned long long)mask_attrs, | |
312 | (unsigned long long)mask_allowed); | |
313 | return false; | |
314 | } | |
315 | ||
316 | return true; | |
317 | } | |
318 | ||
319 | size_t ovs_tun_key_attr_size(void) | |
320 | { | |
321 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
322 | * updating this function. | |
323 | */ | |
324 | return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
325 | + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */ | |
326 | + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */ | |
327 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
328 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
329 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
330 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
331 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
332 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
333 | /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with | |
334 | * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it. | |
335 | */ | |
336 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ | |
337 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
338 | + nla_total_size(4); /* OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS */ | |
339 | } | |
340 | ||
341 | size_t ovs_nsh_key_attr_size(void) | |
342 | { | |
343 | /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider | |
344 | * updating this function. | |
345 | */ | |
346 | return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */ | |
347 | /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are | |
348 | * mutually exclusive, so the bigger one can cover | |
349 | * the small one. | |
350 | */ | |
351 | + nla_total_size(NSH_CTX_HDRS_MAX_LEN); | |
352 | } | |
353 | ||
354 | size_t ovs_key_attr_size(void) | |
355 | { | |
356 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
357 | * updating this function. | |
358 | */ | |
359 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29); | |
360 | ||
361 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
362 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
363 | + ovs_tun_key_attr_size() | |
364 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ | |
365 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
366 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
367 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
368 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */ | |
369 | + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */ | |
370 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */ | |
371 | + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */ | |
372 | + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */ | |
373 | + nla_total_size(0) /* OVS_KEY_ATTR_NSH */ | |
374 | + ovs_nsh_key_attr_size() | |
375 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
376 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
377 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
378 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
379 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
380 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
381 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
382 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
383 | } | |
384 | ||
385 | static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = { | |
386 | [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) }, | |
387 | }; | |
388 | ||
389 | static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
390 | [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) }, | |
391 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) }, | |
392 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) }, | |
393 | [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 }, | |
394 | [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 }, | |
395 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 }, | |
396 | [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 }, | |
397 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) }, | |
398 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) }, | |
399 | [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 }, | |
400 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE }, | |
401 | [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED, | |
402 | .next = ovs_vxlan_ext_key_lens }, | |
403 | [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, | |
404 | [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
405 | [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = sizeof(u32) }, | |
406 | }; | |
407 | ||
408 | static const struct ovs_len_tbl | |
409 | ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = { | |
410 | [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) }, | |
411 | [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) }, | |
412 | [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE }, | |
413 | }; | |
414 | ||
415 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ | |
416 | static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { | |
417 | [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED }, | |
418 | [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) }, | |
419 | [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) }, | |
420 | [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) }, | |
421 | [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) }, | |
422 | [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) }, | |
423 | [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) }, | |
424 | [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) }, | |
425 | [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) }, | |
426 | [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) }, | |
427 | [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) }, | |
428 | [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) }, | |
429 | [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) }, | |
430 | [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) }, | |
431 | [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) }, | |
432 | [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) }, | |
433 | [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) }, | |
434 | [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) }, | |
435 | [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) }, | |
436 | [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, | |
437 | .next = ovs_tunnel_key_lens, }, | |
438 | [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, | |
439 | [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) }, | |
440 | [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) }, | |
441 | [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) }, | |
442 | [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) }, | |
443 | [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = { | |
444 | .len = sizeof(struct ovs_key_ct_tuple_ipv4) }, | |
445 | [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = { | |
446 | .len = sizeof(struct ovs_key_ct_tuple_ipv6) }, | |
447 | [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED, | |
448 | .next = ovs_nsh_key_attr_lens, }, | |
449 | }; | |
450 | ||
451 | static bool check_attr_len(unsigned int attr_len, unsigned int expected_len) | |
452 | { | |
453 | return expected_len == attr_len || | |
454 | expected_len == OVS_ATTR_NESTED || | |
455 | expected_len == OVS_ATTR_VARIABLE; | |
456 | } | |
457 | ||
458 | static bool is_all_zero(const u8 *fp, size_t size) | |
459 | { | |
460 | int i; | |
461 | ||
462 | if (!fp) | |
463 | return false; | |
464 | ||
465 | for (i = 0; i < size; i++) | |
466 | if (fp[i]) | |
467 | return false; | |
468 | ||
469 | return true; | |
470 | } | |
471 | ||
472 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
473 | const struct nlattr *a[], | |
474 | u64 *attrsp, bool log, bool nz) | |
475 | { | |
476 | const struct nlattr *nla; | |
477 | u64 attrs; | |
478 | int rem; | |
479 | ||
480 | attrs = *attrsp; | |
481 | nla_for_each_nested(nla, attr, rem) { | |
482 | u16 type = nla_type(nla); | |
483 | int expected_len; | |
484 | ||
485 | if (type > OVS_KEY_ATTR_MAX) { | |
486 | OVS_NLERR(log, "Key type %d is out of range max %d", | |
487 | type, OVS_KEY_ATTR_MAX); | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | if (attrs & (1 << type)) { | |
492 | OVS_NLERR(log, "Duplicate key (type %d).", type); | |
493 | return -EINVAL; | |
494 | } | |
495 | ||
496 | expected_len = ovs_key_lens[type].len; | |
497 | if (!check_attr_len(nla_len(nla), expected_len)) { | |
498 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", | |
499 | type, nla_len(nla), expected_len); | |
500 | return -EINVAL; | |
501 | } | |
502 | ||
503 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
504 | attrs |= 1 << type; | |
505 | a[type] = nla; | |
506 | } | |
507 | } | |
508 | if (rem) { | |
509 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); | |
510 | return -EINVAL; | |
511 | } | |
512 | ||
513 | *attrsp = attrs; | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
518 | const struct nlattr *a[], u64 *attrsp, | |
519 | bool log) | |
520 | { | |
521 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); | |
522 | } | |
523 | ||
524 | int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[], | |
525 | u64 *attrsp, bool log) | |
526 | { | |
527 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); | |
528 | } | |
529 | ||
530 | static int genev_tun_opt_from_nlattr(const struct nlattr *a, | |
531 | struct sw_flow_match *match, bool is_mask, | |
532 | bool log) | |
533 | { | |
534 | unsigned long opt_key_offset; | |
535 | ||
536 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
537 | OVS_NLERR(log, "Geneve option length err (len %d, max %zu).", | |
538 | nla_len(a), sizeof(match->key->tun_opts)); | |
539 | return -EINVAL; | |
540 | } | |
541 | ||
542 | if (nla_len(a) % 4 != 0) { | |
543 | OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.", | |
544 | nla_len(a)); | |
545 | return -EINVAL; | |
546 | } | |
547 | ||
548 | /* We need to record the length of the options passed | |
549 | * down, otherwise packets with the same format but | |
550 | * additional options will be silently matched. | |
551 | */ | |
552 | if (!is_mask) { | |
553 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
554 | false); | |
555 | } else { | |
556 | /* This is somewhat unusual because it looks at | |
557 | * both the key and mask while parsing the | |
558 | * attributes (and by extension assumes the key | |
559 | * is parsed first). Normally, we would verify | |
560 | * that each is the correct length and that the | |
561 | * attributes line up in the validate function. | |
562 | * However, that is difficult because this is | |
563 | * variable length and we won't have the | |
564 | * information later. | |
565 | */ | |
566 | if (match->key->tun_opts_len != nla_len(a)) { | |
567 | OVS_NLERR(log, "Geneve option len %d != mask len %d", | |
568 | match->key->tun_opts_len, nla_len(a)); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
572 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
573 | } | |
574 | ||
575 | opt_key_offset = TUN_METADATA_OFFSET(nla_len(a)); | |
576 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), | |
577 | nla_len(a), is_mask); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr, | |
582 | struct sw_flow_match *match, bool is_mask, | |
583 | bool log) | |
584 | { | |
585 | struct nlattr *a; | |
586 | int rem; | |
587 | unsigned long opt_key_offset; | |
588 | struct vxlan_metadata opts; | |
589 | ||
590 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
591 | ||
592 | memset(&opts, 0, sizeof(opts)); | |
593 | nla_for_each_nested(a, attr, rem) { | |
594 | int type = nla_type(a); | |
595 | ||
596 | if (type > OVS_VXLAN_EXT_MAX) { | |
597 | OVS_NLERR(log, "VXLAN extension %d out of range max %d", | |
598 | type, OVS_VXLAN_EXT_MAX); | |
599 | return -EINVAL; | |
600 | } | |
601 | ||
602 | if (!check_attr_len(nla_len(a), | |
603 | ovs_vxlan_ext_key_lens[type].len)) { | |
604 | OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d", | |
605 | type, nla_len(a), | |
606 | ovs_vxlan_ext_key_lens[type].len); | |
607 | return -EINVAL; | |
608 | } | |
609 | ||
610 | switch (type) { | |
611 | case OVS_VXLAN_EXT_GBP: | |
612 | opts.gbp = nla_get_u32(a); | |
613 | break; | |
614 | default: | |
615 | OVS_NLERR(log, "Unknown VXLAN extension attribute %d", | |
616 | type); | |
617 | return -EINVAL; | |
618 | } | |
619 | } | |
620 | if (rem) { | |
621 | OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.", | |
622 | rem); | |
623 | return -EINVAL; | |
624 | } | |
625 | ||
626 | if (!is_mask) | |
627 | SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false); | |
628 | else | |
629 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
630 | ||
631 | opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts)); | |
632 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts), | |
633 | is_mask); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static int erspan_tun_opt_from_nlattr(const struct nlattr *attr, | |
638 | struct sw_flow_match *match, bool is_mask, | |
639 | bool log) | |
640 | { | |
641 | unsigned long opt_key_offset; | |
642 | struct erspan_metadata opts; | |
643 | ||
644 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
645 | ||
646 | memset(&opts, 0, sizeof(opts)); | |
647 | opts.index = nla_get_be32(attr); | |
648 | ||
649 | /* Index has only 20-bit */ | |
650 | if (ntohl(opts.index) & ~INDEX_MASK) { | |
651 | OVS_NLERR(log, "ERSPAN index number %x too large.", | |
652 | ntohl(opts.index)); | |
653 | return -EINVAL; | |
654 | } | |
655 | ||
656 | SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), is_mask); | |
657 | opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts)); | |
658 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts), | |
659 | is_mask); | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int ip_tun_from_nlattr(const struct nlattr *attr, | |
665 | struct sw_flow_match *match, bool is_mask, | |
666 | bool log) | |
667 | { | |
668 | bool ttl = false, ipv4 = false, ipv6 = false; | |
669 | __be16 tun_flags = 0; | |
670 | int opts_type = 0; | |
671 | struct nlattr *a; | |
672 | int rem; | |
673 | ||
674 | nla_for_each_nested(a, attr, rem) { | |
675 | int type = nla_type(a); | |
676 | int err; | |
677 | ||
678 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { | |
679 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", | |
680 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | if (!check_attr_len(nla_len(a), | |
685 | ovs_tunnel_key_lens[type].len)) { | |
686 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", | |
687 | type, nla_len(a), ovs_tunnel_key_lens[type].len); | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | switch (type) { | |
692 | case OVS_TUNNEL_KEY_ATTR_ID: | |
693 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
694 | nla_get_be64(a), is_mask); | |
695 | tun_flags |= TUNNEL_KEY; | |
696 | break; | |
697 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
698 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src, | |
699 | nla_get_in_addr(a), is_mask); | |
700 | ipv4 = true; | |
701 | break; | |
702 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
703 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst, | |
704 | nla_get_in_addr(a), is_mask); | |
705 | ipv4 = true; | |
706 | break; | |
707 | case OVS_TUNNEL_KEY_ATTR_IPV6_SRC: | |
708 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src, | |
709 | nla_get_in6_addr(a), is_mask); | |
710 | ipv6 = true; | |
711 | break; | |
712 | case OVS_TUNNEL_KEY_ATTR_IPV6_DST: | |
713 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst, | |
714 | nla_get_in6_addr(a), is_mask); | |
715 | ipv6 = true; | |
716 | break; | |
717 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
718 | SW_FLOW_KEY_PUT(match, tun_key.tos, | |
719 | nla_get_u8(a), is_mask); | |
720 | break; | |
721 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
722 | SW_FLOW_KEY_PUT(match, tun_key.ttl, | |
723 | nla_get_u8(a), is_mask); | |
724 | ttl = true; | |
725 | break; | |
726 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
727 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
728 | break; | |
729 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
730 | tun_flags |= TUNNEL_CSUM; | |
731 | break; | |
732 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: | |
733 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
734 | nla_get_be16(a), is_mask); | |
735 | break; | |
736 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
737 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
738 | nla_get_be16(a), is_mask); | |
739 | break; | |
740 | case OVS_TUNNEL_KEY_ATTR_OAM: | |
741 | tun_flags |= TUNNEL_OAM; | |
742 | break; | |
743 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
744 | if (opts_type) { | |
745 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
746 | return -EINVAL; | |
747 | } | |
748 | ||
749 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); | |
750 | if (err) | |
751 | return err; | |
752 | ||
753 | tun_flags |= TUNNEL_GENEVE_OPT; | |
754 | opts_type = type; | |
755 | break; | |
756 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
757 | if (opts_type) { | |
758 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log); | |
763 | if (err) | |
764 | return err; | |
765 | ||
766 | tun_flags |= TUNNEL_VXLAN_OPT; | |
767 | opts_type = type; | |
768 | break; | |
769 | case OVS_TUNNEL_KEY_ATTR_PAD: | |
770 | break; | |
771 | case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS: | |
772 | if (opts_type) { | |
773 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
774 | return -EINVAL; | |
775 | } | |
776 | ||
777 | err = erspan_tun_opt_from_nlattr(a, match, is_mask, log); | |
778 | if (err) | |
779 | return err; | |
780 | ||
781 | tun_flags |= TUNNEL_ERSPAN_OPT; | |
782 | opts_type = type; | |
783 | break; | |
784 | default: | |
785 | OVS_NLERR(log, "Unknown IP tunnel attribute %d", | |
786 | type); | |
787 | return -EINVAL; | |
788 | } | |
789 | } | |
790 | ||
791 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
792 | if (is_mask) | |
793 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true); | |
794 | else | |
795 | SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET, | |
796 | false); | |
797 | ||
798 | if (rem > 0) { | |
799 | OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.", | |
800 | rem); | |
801 | return -EINVAL; | |
802 | } | |
803 | ||
804 | if (ipv4 && ipv6) { | |
805 | OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes"); | |
806 | return -EINVAL; | |
807 | } | |
808 | ||
809 | if (!is_mask) { | |
810 | if (!ipv4 && !ipv6) { | |
811 | OVS_NLERR(log, "IP tunnel dst address not specified"); | |
812 | return -EINVAL; | |
813 | } | |
814 | if (ipv4 && !match->key->tun_key.u.ipv4.dst) { | |
815 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); | |
816 | return -EINVAL; | |
817 | } | |
818 | if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) { | |
819 | OVS_NLERR(log, "IPv6 tunnel dst address is zero"); | |
820 | return -EINVAL; | |
821 | } | |
822 | ||
823 | if (!ttl) { | |
824 | OVS_NLERR(log, "IP tunnel TTL not specified."); | |
825 | return -EINVAL; | |
826 | } | |
827 | } | |
828 | ||
829 | return opts_type; | |
830 | } | |
831 | ||
832 | static int vxlan_opt_to_nlattr(struct sk_buff *skb, | |
833 | const void *tun_opts, int swkey_tun_opts_len) | |
834 | { | |
835 | const struct vxlan_metadata *opts = tun_opts; | |
836 | struct nlattr *nla; | |
837 | ||
838 | nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); | |
839 | if (!nla) | |
840 | return -EMSGSIZE; | |
841 | ||
842 | if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0) | |
843 | return -EMSGSIZE; | |
844 | ||
845 | nla_nest_end(skb, nla); | |
846 | return 0; | |
847 | } | |
848 | ||
849 | static int __ip_tun_to_nlattr(struct sk_buff *skb, | |
850 | const struct ip_tunnel_key *output, | |
851 | const void *tun_opts, int swkey_tun_opts_len, | |
852 | unsigned short tun_proto) | |
853 | { | |
854 | if (output->tun_flags & TUNNEL_KEY && | |
855 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id, | |
856 | OVS_TUNNEL_KEY_ATTR_PAD)) | |
857 | return -EMSGSIZE; | |
858 | switch (tun_proto) { | |
859 | case AF_INET: | |
860 | if (output->u.ipv4.src && | |
861 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, | |
862 | output->u.ipv4.src)) | |
863 | return -EMSGSIZE; | |
864 | if (output->u.ipv4.dst && | |
865 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, | |
866 | output->u.ipv4.dst)) | |
867 | return -EMSGSIZE; | |
868 | break; | |
869 | case AF_INET6: | |
870 | if (!ipv6_addr_any(&output->u.ipv6.src) && | |
871 | nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC, | |
872 | &output->u.ipv6.src)) | |
873 | return -EMSGSIZE; | |
874 | if (!ipv6_addr_any(&output->u.ipv6.dst) && | |
875 | nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST, | |
876 | &output->u.ipv6.dst)) | |
877 | return -EMSGSIZE; | |
878 | break; | |
879 | } | |
880 | if (output->tos && | |
881 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos)) | |
882 | return -EMSGSIZE; | |
883 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl)) | |
884 | return -EMSGSIZE; | |
885 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
886 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) | |
887 | return -EMSGSIZE; | |
888 | if ((output->tun_flags & TUNNEL_CSUM) && | |
889 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) | |
890 | return -EMSGSIZE; | |
891 | if (output->tp_src && | |
892 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) | |
893 | return -EMSGSIZE; | |
894 | if (output->tp_dst && | |
895 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) | |
896 | return -EMSGSIZE; | |
897 | if ((output->tun_flags & TUNNEL_OAM) && | |
898 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
899 | return -EMSGSIZE; | |
900 | if (swkey_tun_opts_len) { | |
901 | if (output->tun_flags & TUNNEL_GENEVE_OPT && | |
902 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
903 | swkey_tun_opts_len, tun_opts)) | |
904 | return -EMSGSIZE; | |
905 | else if (output->tun_flags & TUNNEL_VXLAN_OPT && | |
906 | vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len)) | |
907 | return -EMSGSIZE; | |
908 | else if (output->tun_flags & TUNNEL_ERSPAN_OPT && | |
909 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS, | |
910 | ((struct erspan_metadata *)tun_opts)->index)) | |
911 | return -EMSGSIZE; | |
912 | } | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | static int ip_tun_to_nlattr(struct sk_buff *skb, | |
918 | const struct ip_tunnel_key *output, | |
919 | const void *tun_opts, int swkey_tun_opts_len, | |
920 | unsigned short tun_proto) | |
921 | { | |
922 | struct nlattr *nla; | |
923 | int err; | |
924 | ||
925 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
926 | if (!nla) | |
927 | return -EMSGSIZE; | |
928 | ||
929 | err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len, | |
930 | tun_proto); | |
931 | if (err) | |
932 | return err; | |
933 | ||
934 | nla_nest_end(skb, nla); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | int ovs_nla_put_tunnel_info(struct sk_buff *skb, | |
939 | struct ip_tunnel_info *tun_info) | |
940 | { | |
941 | return __ip_tun_to_nlattr(skb, &tun_info->key, | |
942 | ip_tunnel_info_opts(tun_info), | |
943 | tun_info->options_len, | |
944 | ip_tunnel_info_af(tun_info)); | |
945 | } | |
946 | ||
947 | static int encode_vlan_from_nlattrs(struct sw_flow_match *match, | |
948 | const struct nlattr *a[], | |
949 | bool is_mask, bool inner) | |
950 | { | |
951 | __be16 tci = 0; | |
952 | __be16 tpid = 0; | |
953 | ||
954 | if (a[OVS_KEY_ATTR_VLAN]) | |
955 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
956 | ||
957 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
958 | tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
959 | ||
960 | if (likely(!inner)) { | |
961 | SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask); | |
962 | SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask); | |
963 | } else { | |
964 | SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask); | |
965 | SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask); | |
966 | } | |
967 | return 0; | |
968 | } | |
969 | ||
970 | static int validate_vlan_from_nlattrs(const struct sw_flow_match *match, | |
971 | u64 key_attrs, bool inner, | |
972 | const struct nlattr **a, bool log) | |
973 | { | |
974 | __be16 tci = 0; | |
975 | ||
976 | if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
977 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
978 | eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) { | |
979 | /* Not a VLAN. */ | |
980 | return 0; | |
981 | } | |
982 | ||
983 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
984 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
985 | OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN"); | |
986 | return -EINVAL; | |
987 | } | |
988 | ||
989 | if (a[OVS_KEY_ATTR_VLAN]) | |
990 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
991 | ||
992 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
993 | if (tci) { | |
994 | OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.", | |
995 | (inner) ? "C-VLAN" : "VLAN"); | |
996 | return -EINVAL; | |
997 | } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) { | |
998 | /* Corner case for truncated VLAN header. */ | |
999 | OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.", | |
1000 | (inner) ? "C-VLAN" : "VLAN"); | |
1001 | return -EINVAL; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | return 1; | |
1006 | } | |
1007 | ||
1008 | static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match, | |
1009 | u64 key_attrs, bool inner, | |
1010 | const struct nlattr **a, bool log) | |
1011 | { | |
1012 | __be16 tci = 0; | |
1013 | __be16 tpid = 0; | |
1014 | bool encap_valid = !!(match->key->eth.vlan.tci & | |
1015 | htons(VLAN_TAG_PRESENT)); | |
1016 | bool i_encap_valid = !!(match->key->eth.cvlan.tci & | |
1017 | htons(VLAN_TAG_PRESENT)); | |
1018 | ||
1019 | if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) { | |
1020 | /* Not a VLAN. */ | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | if ((!inner && !encap_valid) || (inner && !i_encap_valid)) { | |
1025 | OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.", | |
1026 | (inner) ? "C-VLAN" : "VLAN"); | |
1027 | return -EINVAL; | |
1028 | } | |
1029 | ||
1030 | if (a[OVS_KEY_ATTR_VLAN]) | |
1031 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1032 | ||
1033 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1034 | tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1035 | ||
1036 | if (tpid != htons(0xffff)) { | |
1037 | OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).", | |
1038 | (inner) ? "C-VLAN" : "VLAN", ntohs(tpid)); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
1042 | OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.", | |
1043 | (inner) ? "C-VLAN" : "VLAN"); | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | ||
1047 | return 1; | |
1048 | } | |
1049 | ||
1050 | static int __parse_vlan_from_nlattrs(struct sw_flow_match *match, | |
1051 | u64 *key_attrs, bool inner, | |
1052 | const struct nlattr **a, bool is_mask, | |
1053 | bool log) | |
1054 | { | |
1055 | int err; | |
1056 | const struct nlattr *encap; | |
1057 | ||
1058 | if (!is_mask) | |
1059 | err = validate_vlan_from_nlattrs(match, *key_attrs, inner, | |
1060 | a, log); | |
1061 | else | |
1062 | err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner, | |
1063 | a, log); | |
1064 | if (err <= 0) | |
1065 | return err; | |
1066 | ||
1067 | err = encode_vlan_from_nlattrs(match, a, is_mask, inner); | |
1068 | if (err) | |
1069 | return err; | |
1070 | ||
1071 | *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1072 | *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
1073 | *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1074 | ||
1075 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1076 | ||
1077 | if (!is_mask) | |
1078 | err = parse_flow_nlattrs(encap, a, key_attrs, log); | |
1079 | else | |
1080 | err = parse_flow_mask_nlattrs(encap, a, key_attrs, log); | |
1081 | ||
1082 | return err; | |
1083 | } | |
1084 | ||
1085 | static int parse_vlan_from_nlattrs(struct sw_flow_match *match, | |
1086 | u64 *key_attrs, const struct nlattr **a, | |
1087 | bool is_mask, bool log) | |
1088 | { | |
1089 | int err; | |
1090 | bool encap_valid = false; | |
1091 | ||
1092 | err = __parse_vlan_from_nlattrs(match, key_attrs, false, a, | |
1093 | is_mask, log); | |
1094 | if (err) | |
1095 | return err; | |
1096 | ||
1097 | encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT)); | |
1098 | if (encap_valid) { | |
1099 | err = __parse_vlan_from_nlattrs(match, key_attrs, true, a, | |
1100 | is_mask, log); | |
1101 | if (err) | |
1102 | return err; | |
1103 | } | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | static int parse_eth_type_from_nlattrs(struct sw_flow_match *match, | |
1109 | u64 *attrs, const struct nlattr **a, | |
1110 | bool is_mask, bool log) | |
1111 | { | |
1112 | __be16 eth_type; | |
1113 | ||
1114 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1115 | if (is_mask) { | |
1116 | /* Always exact match EtherType. */ | |
1117 | eth_type = htons(0xffff); | |
1118 | } else if (!eth_proto_is_802_3(eth_type)) { | |
1119 | OVS_NLERR(log, "EtherType %x is less than min %x", | |
1120 | ntohs(eth_type), ETH_P_802_3_MIN); | |
1121 | return -EINVAL; | |
1122 | } | |
1123 | ||
1124 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1125 | *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, | |
1130 | u64 *attrs, const struct nlattr **a, | |
1131 | bool is_mask, bool log) | |
1132 | { | |
1133 | u8 mac_proto = MAC_PROTO_ETHERNET; | |
1134 | ||
1135 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { | |
1136 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
1137 | ||
1138 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
1139 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
1140 | } | |
1141 | ||
1142 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
1143 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
1144 | ||
1145 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
1146 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
1147 | } | |
1148 | ||
1149 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { | |
1150 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1151 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1152 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
1153 | } | |
1154 | ||
1155 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
1156 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
1157 | ||
1158 | if (is_mask) { | |
1159 | in_port = 0xffffffff; /* Always exact match in_port. */ | |
1160 | } else if (in_port >= DP_MAX_PORTS) { | |
1161 | OVS_NLERR(log, "Port %d exceeds max allowable %d", | |
1162 | in_port, DP_MAX_PORTS); | |
1163 | return -EINVAL; | |
1164 | } | |
1165 | ||
1166 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
1167 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
1168 | } else if (!is_mask) { | |
1169 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
1170 | } | |
1171 | ||
1172 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
1173 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
1174 | ||
1175 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
1176 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
1177 | } | |
1178 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
1179 | if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1180 | is_mask, log) < 0) | |
1181 | return -EINVAL; | |
1182 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
1183 | } | |
1184 | ||
1185 | if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && | |
1186 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { | |
1187 | u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]); | |
1188 | ||
1189 | if (ct_state & ~CT_SUPPORTED_MASK) { | |
1190 | OVS_NLERR(log, "ct_state flags %08x unsupported", | |
1191 | ct_state); | |
1192 | return -EINVAL; | |
1193 | } | |
1194 | ||
1195 | SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask); | |
1196 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); | |
1197 | } | |
1198 | if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && | |
1199 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) { | |
1200 | u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); | |
1201 | ||
1202 | SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask); | |
1203 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); | |
1204 | } | |
1205 | if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) && | |
1206 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) { | |
1207 | u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]); | |
1208 | ||
1209 | SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask); | |
1210 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK); | |
1211 | } | |
1212 | if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) && | |
1213 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) { | |
1214 | const struct ovs_key_ct_labels *cl; | |
1215 | ||
1216 | cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]); | |
1217 | SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels, | |
1218 | sizeof(*cl), is_mask); | |
1219 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS); | |
1220 | } | |
1221 | if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) { | |
1222 | const struct ovs_key_ct_tuple_ipv4 *ct; | |
1223 | ||
1224 | ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]); | |
1225 | ||
1226 | SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask); | |
1227 | SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask); | |
1228 | SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask); | |
1229 | SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask); | |
1230 | SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask); | |
1231 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4); | |
1232 | } | |
1233 | if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) { | |
1234 | const struct ovs_key_ct_tuple_ipv6 *ct; | |
1235 | ||
1236 | ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]); | |
1237 | ||
1238 | SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src, | |
1239 | sizeof(match->key->ipv6.ct_orig.src), | |
1240 | is_mask); | |
1241 | SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst, | |
1242 | sizeof(match->key->ipv6.ct_orig.dst), | |
1243 | is_mask); | |
1244 | SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask); | |
1245 | SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask); | |
1246 | SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask); | |
1247 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6); | |
1248 | } | |
1249 | ||
1250 | /* For layer 3 packets the Ethernet type is provided | |
1251 | * and treated as metadata but no MAC addresses are provided. | |
1252 | */ | |
1253 | if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) && | |
1254 | (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE))) | |
1255 | mac_proto = MAC_PROTO_NONE; | |
1256 | ||
1257 | /* Always exact match mac_proto */ | |
1258 | SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask); | |
1259 | ||
1260 | if (mac_proto == MAC_PROTO_NONE) | |
1261 | return parse_eth_type_from_nlattrs(match, attrs, a, is_mask, | |
1262 | log); | |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | int nsh_hdr_from_nlattr(const struct nlattr *attr, | |
1268 | struct nshhdr *nh, size_t size) | |
1269 | { | |
1270 | struct nlattr *a; | |
1271 | int rem; | |
1272 | u8 flags = 0; | |
1273 | u8 ttl = 0; | |
1274 | int mdlen = 0; | |
1275 | ||
1276 | /* validate_nsh has check this, so we needn't do duplicate check here | |
1277 | */ | |
1278 | if (size < NSH_BASE_HDR_LEN) | |
1279 | return -ENOBUFS; | |
1280 | ||
1281 | nla_for_each_nested(a, attr, rem) { | |
1282 | int type = nla_type(a); | |
1283 | ||
1284 | switch (type) { | |
1285 | case OVS_NSH_KEY_ATTR_BASE: { | |
1286 | const struct ovs_nsh_key_base *base = nla_data(a); | |
1287 | ||
1288 | flags = base->flags; | |
1289 | ttl = base->ttl; | |
1290 | nh->np = base->np; | |
1291 | nh->mdtype = base->mdtype; | |
1292 | nh->path_hdr = base->path_hdr; | |
1293 | break; | |
1294 | } | |
1295 | case OVS_NSH_KEY_ATTR_MD1: | |
1296 | mdlen = nla_len(a); | |
1297 | if (mdlen > size - NSH_BASE_HDR_LEN) | |
1298 | return -ENOBUFS; | |
1299 | memcpy(&nh->md1, nla_data(a), mdlen); | |
1300 | break; | |
1301 | ||
1302 | case OVS_NSH_KEY_ATTR_MD2: | |
1303 | mdlen = nla_len(a); | |
1304 | if (mdlen > size - NSH_BASE_HDR_LEN) | |
1305 | return -ENOBUFS; | |
1306 | memcpy(&nh->md2, nla_data(a), mdlen); | |
1307 | break; | |
1308 | ||
1309 | default: | |
1310 | return -EINVAL; | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | /* nsh header length = NSH_BASE_HDR_LEN + mdlen */ | |
1315 | nh->ver_flags_ttl_len = 0; | |
1316 | nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen); | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | int nsh_key_from_nlattr(const struct nlattr *attr, | |
1322 | struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask) | |
1323 | { | |
1324 | struct nlattr *a; | |
1325 | int rem; | |
1326 | ||
1327 | /* validate_nsh has check this, so we needn't do duplicate check here | |
1328 | */ | |
1329 | nla_for_each_nested(a, attr, rem) { | |
1330 | int type = nla_type(a); | |
1331 | ||
1332 | switch (type) { | |
1333 | case OVS_NSH_KEY_ATTR_BASE: { | |
1334 | const struct ovs_nsh_key_base *base = nla_data(a); | |
1335 | const struct ovs_nsh_key_base *base_mask = base + 1; | |
1336 | ||
1337 | nsh->base = *base; | |
1338 | nsh_mask->base = *base_mask; | |
1339 | break; | |
1340 | } | |
1341 | case OVS_NSH_KEY_ATTR_MD1: { | |
1342 | const struct ovs_nsh_key_md1 *md1 = nla_data(a); | |
1343 | const struct ovs_nsh_key_md1 *md1_mask = md1 + 1; | |
1344 | ||
1345 | memcpy(nsh->context, md1->context, sizeof(*md1)); | |
1346 | memcpy(nsh_mask->context, md1_mask->context, | |
1347 | sizeof(*md1_mask)); | |
1348 | break; | |
1349 | } | |
1350 | case OVS_NSH_KEY_ATTR_MD2: | |
1351 | /* Not supported yet */ | |
1352 | return -ENOTSUPP; | |
1353 | default: | |
1354 | return -EINVAL; | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static int nsh_key_put_from_nlattr(const struct nlattr *attr, | |
1362 | struct sw_flow_match *match, bool is_mask, | |
1363 | bool is_push_nsh, bool log) | |
1364 | { | |
1365 | struct nlattr *a; | |
1366 | int rem; | |
1367 | bool has_base = false; | |
1368 | bool has_md1 = false; | |
1369 | bool has_md2 = false; | |
1370 | u8 mdtype = 0; | |
1371 | int mdlen = 0; | |
1372 | ||
1373 | if (WARN_ON(is_push_nsh && is_mask)) | |
1374 | return -EINVAL; | |
1375 | ||
1376 | nla_for_each_nested(a, attr, rem) { | |
1377 | int type = nla_type(a); | |
1378 | int i; | |
1379 | ||
1380 | if (type > OVS_NSH_KEY_ATTR_MAX) { | |
1381 | OVS_NLERR(log, "nsh attr %d is out of range max %d", | |
1382 | type, OVS_NSH_KEY_ATTR_MAX); | |
1383 | return -EINVAL; | |
1384 | } | |
1385 | ||
1386 | if (!check_attr_len(nla_len(a), | |
1387 | ovs_nsh_key_attr_lens[type].len)) { | |
1388 | OVS_NLERR( | |
1389 | log, | |
1390 | "nsh attr %d has unexpected len %d expected %d", | |
1391 | type, | |
1392 | nla_len(a), | |
1393 | ovs_nsh_key_attr_lens[type].len | |
1394 | ); | |
1395 | return -EINVAL; | |
1396 | } | |
1397 | ||
1398 | switch (type) { | |
1399 | case OVS_NSH_KEY_ATTR_BASE: { | |
1400 | const struct ovs_nsh_key_base *base = nla_data(a); | |
1401 | ||
1402 | has_base = true; | |
1403 | mdtype = base->mdtype; | |
1404 | SW_FLOW_KEY_PUT(match, nsh.base.flags, | |
1405 | base->flags, is_mask); | |
1406 | SW_FLOW_KEY_PUT(match, nsh.base.ttl, | |
1407 | base->ttl, is_mask); | |
1408 | SW_FLOW_KEY_PUT(match, nsh.base.mdtype, | |
1409 | base->mdtype, is_mask); | |
1410 | SW_FLOW_KEY_PUT(match, nsh.base.np, | |
1411 | base->np, is_mask); | |
1412 | SW_FLOW_KEY_PUT(match, nsh.base.path_hdr, | |
1413 | base->path_hdr, is_mask); | |
1414 | break; | |
1415 | } | |
1416 | case OVS_NSH_KEY_ATTR_MD1: { | |
1417 | const struct ovs_nsh_key_md1 *md1 = nla_data(a); | |
1418 | ||
1419 | has_md1 = true; | |
1420 | for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++) | |
1421 | SW_FLOW_KEY_PUT(match, nsh.context[i], | |
1422 | md1->context[i], is_mask); | |
1423 | break; | |
1424 | } | |
1425 | case OVS_NSH_KEY_ATTR_MD2: | |
1426 | if (!is_push_nsh) /* Not supported MD type 2 yet */ | |
1427 | return -ENOTSUPP; | |
1428 | ||
1429 | has_md2 = true; | |
1430 | mdlen = nla_len(a); | |
1431 | if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) { | |
1432 | OVS_NLERR( | |
1433 | log, | |
1434 | "Invalid MD length %d for MD type %d", | |
1435 | mdlen, | |
1436 | mdtype | |
1437 | ); | |
1438 | return -EINVAL; | |
1439 | } | |
1440 | break; | |
1441 | default: | |
1442 | OVS_NLERR(log, "Unknown nsh attribute %d", | |
1443 | type); | |
1444 | return -EINVAL; | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | if (rem > 0) { | |
1449 | OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem); | |
1450 | return -EINVAL; | |
1451 | } | |
1452 | ||
1453 | if (has_md1 && has_md2) { | |
1454 | OVS_NLERR( | |
1455 | 1, | |
1456 | "invalid nsh attribute: md1 and md2 are exclusive." | |
1457 | ); | |
1458 | return -EINVAL; | |
1459 | } | |
1460 | ||
1461 | if (!is_mask) { | |
1462 | if ((has_md1 && mdtype != NSH_M_TYPE1) || | |
1463 | (has_md2 && mdtype != NSH_M_TYPE2)) { | |
1464 | OVS_NLERR(1, "nsh attribute has unmatched MD type %d.", | |
1465 | mdtype); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | ||
1469 | if (is_push_nsh && | |
1470 | (!has_base || (!has_md1 && !has_md2))) { | |
1471 | OVS_NLERR( | |
1472 | 1, | |
1473 | "push_nsh: missing base or metadata attributes" | |
1474 | ); | |
1475 | return -EINVAL; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match, | |
1483 | u64 attrs, const struct nlattr **a, | |
1484 | bool is_mask, bool log) | |
1485 | { | |
1486 | int err; | |
1487 | ||
1488 | err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log); | |
1489 | if (err) | |
1490 | return err; | |
1491 | ||
1492 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
1493 | const struct ovs_key_ethernet *eth_key; | |
1494 | ||
1495 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
1496 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1497 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1498 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1499 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1500 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
1501 | ||
1502 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
1503 | /* VLAN attribute is always parsed before getting here since it | |
1504 | * may occur multiple times. | |
1505 | */ | |
1506 | OVS_NLERR(log, "VLAN attribute unexpected."); | |
1507 | return -EINVAL; | |
1508 | } | |
1509 | ||
1510 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
1511 | err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask, | |
1512 | log); | |
1513 | if (err) | |
1514 | return err; | |
1515 | } else if (!is_mask) { | |
1516 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
1517 | } | |
1518 | } else if (!match->key->eth.type) { | |
1519 | OVS_NLERR(log, "Either Ethernet header or EtherType is required."); | |
1520 | return -EINVAL; | |
1521 | } | |
1522 | ||
1523 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1524 | const struct ovs_key_ipv4 *ipv4_key; | |
1525 | ||
1526 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1527 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
1528 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", | |
1529 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
1530 | return -EINVAL; | |
1531 | } | |
1532 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1533 | ipv4_key->ipv4_proto, is_mask); | |
1534 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1535 | ipv4_key->ipv4_tos, is_mask); | |
1536 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1537 | ipv4_key->ipv4_ttl, is_mask); | |
1538 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1539 | ipv4_key->ipv4_frag, is_mask); | |
1540 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1541 | ipv4_key->ipv4_src, is_mask); | |
1542 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1543 | ipv4_key->ipv4_dst, is_mask); | |
1544 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
1545 | } | |
1546 | ||
1547 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
1548 | const struct ovs_key_ipv6 *ipv6_key; | |
1549 | ||
1550 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
1551 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
1552 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", | |
1553 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
1554 | return -EINVAL; | |
1555 | } | |
1556 | ||
1557 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { | |
1558 | OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)", | |
1559 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); | |
1560 | return -EINVAL; | |
1561 | } | |
1562 | ||
1563 | SW_FLOW_KEY_PUT(match, ipv6.label, | |
1564 | ipv6_key->ipv6_label, is_mask); | |
1565 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1566 | ipv6_key->ipv6_proto, is_mask); | |
1567 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1568 | ipv6_key->ipv6_tclass, is_mask); | |
1569 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1570 | ipv6_key->ipv6_hlimit, is_mask); | |
1571 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1572 | ipv6_key->ipv6_frag, is_mask); | |
1573 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1574 | ipv6_key->ipv6_src, | |
1575 | sizeof(match->key->ipv6.addr.src), | |
1576 | is_mask); | |
1577 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1578 | ipv6_key->ipv6_dst, | |
1579 | sizeof(match->key->ipv6.addr.dst), | |
1580 | is_mask); | |
1581 | ||
1582 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
1583 | } | |
1584 | ||
1585 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
1586 | const struct ovs_key_arp *arp_key; | |
1587 | ||
1588 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1589 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
1590 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", | |
1591 | arp_key->arp_op); | |
1592 | return -EINVAL; | |
1593 | } | |
1594 | ||
1595 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1596 | arp_key->arp_sip, is_mask); | |
1597 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1598 | arp_key->arp_tip, is_mask); | |
1599 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1600 | ntohs(arp_key->arp_op), is_mask); | |
1601 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1602 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1603 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1604 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1605 | ||
1606 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
1607 | } | |
1608 | ||
1609 | if (attrs & (1 << OVS_KEY_ATTR_NSH)) { | |
1610 | if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match, | |
1611 | is_mask, false, log) < 0) | |
1612 | return -EINVAL; | |
1613 | attrs &= ~(1 << OVS_KEY_ATTR_NSH); | |
1614 | } | |
1615 | ||
1616 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { | |
1617 | const struct ovs_key_mpls *mpls_key; | |
1618 | ||
1619 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
1620 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
1621 | mpls_key->mpls_lse, is_mask); | |
1622 | ||
1623 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
1624 | } | |
1625 | ||
1626 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { | |
1627 | const struct ovs_key_tcp *tcp_key; | |
1628 | ||
1629 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1630 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); | |
1631 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
1632 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); | |
1633 | } | |
1634 | ||
1635 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { | |
1636 | SW_FLOW_KEY_PUT(match, tp.flags, | |
1637 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
1638 | is_mask); | |
1639 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); | |
1640 | } | |
1641 | ||
1642 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { | |
1643 | const struct ovs_key_udp *udp_key; | |
1644 | ||
1645 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1646 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); | |
1647 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
1648 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); | |
1649 | } | |
1650 | ||
1651 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
1652 | const struct ovs_key_sctp *sctp_key; | |
1653 | ||
1654 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1655 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); | |
1656 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
1657 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); | |
1658 | } | |
1659 | ||
1660 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
1661 | const struct ovs_key_icmp *icmp_key; | |
1662 | ||
1663 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1664 | SW_FLOW_KEY_PUT(match, tp.src, | |
1665 | htons(icmp_key->icmp_type), is_mask); | |
1666 | SW_FLOW_KEY_PUT(match, tp.dst, | |
1667 | htons(icmp_key->icmp_code), is_mask); | |
1668 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
1669 | } | |
1670 | ||
1671 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
1672 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1673 | ||
1674 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1675 | SW_FLOW_KEY_PUT(match, tp.src, | |
1676 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1677 | SW_FLOW_KEY_PUT(match, tp.dst, | |
1678 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1679 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
1680 | } | |
1681 | ||
1682 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
1683 | const struct ovs_key_nd *nd_key; | |
1684 | ||
1685 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1686 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1687 | nd_key->nd_target, | |
1688 | sizeof(match->key->ipv6.nd.target), | |
1689 | is_mask); | |
1690 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1691 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1692 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1693 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1694 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
1695 | } | |
1696 | ||
1697 | if (attrs != 0) { | |
1698 | OVS_NLERR(log, "Unknown key attributes %llx", | |
1699 | (unsigned long long)attrs); | |
1700 | return -EINVAL; | |
1701 | } | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static void nlattr_set(struct nlattr *attr, u8 val, | |
1707 | const struct ovs_len_tbl *tbl) | |
1708 | { | |
1709 | struct nlattr *nla; | |
1710 | int rem; | |
1711 | ||
1712 | /* The nlattr stream should already have been validated */ | |
1713 | nla_for_each_nested(nla, attr, rem) { | |
1714 | if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) { | |
1715 | if (tbl[nla_type(nla)].next) | |
1716 | tbl = tbl[nla_type(nla)].next; | |
1717 | nlattr_set(nla, val, tbl); | |
1718 | } else { | |
1719 | memset(nla_data(nla), val, nla_len(nla)); | |
1720 | } | |
1721 | ||
1722 | if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE) | |
1723 | *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK; | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1728 | { | |
1729 | nlattr_set(attr, val, ovs_key_lens); | |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1734 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1735 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1736 | * does not include any don't care bit. | |
1737 | * @net: Used to determine per-namespace field support. | |
1738 | * @match: receives the extracted flow match information. | |
1739 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1740 | * sequence. The fields should of the packet that triggered the creation | |
1741 | * of this flow. | |
1742 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1743 | * attribute specifies the mask field of the wildcarded flow. | |
1744 | * @log: Boolean to allow kernel error logging. Normally true, but when | |
1745 | * probing for feature compatibility this should be passed in as false to | |
1746 | * suppress unnecessary error logging. | |
1747 | */ | |
1748 | int ovs_nla_get_match(struct net *net, struct sw_flow_match *match, | |
1749 | const struct nlattr *nla_key, | |
1750 | const struct nlattr *nla_mask, | |
1751 | bool log) | |
1752 | { | |
1753 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1754 | struct nlattr *newmask = NULL; | |
1755 | u64 key_attrs = 0; | |
1756 | u64 mask_attrs = 0; | |
1757 | int err; | |
1758 | ||
1759 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); | |
1760 | if (err) | |
1761 | return err; | |
1762 | ||
1763 | err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log); | |
1764 | if (err) | |
1765 | return err; | |
1766 | ||
1767 | err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log); | |
1768 | if (err) | |
1769 | return err; | |
1770 | ||
1771 | if (match->mask) { | |
1772 | if (!nla_mask) { | |
1773 | /* Create an exact match mask. We need to set to 0xff | |
1774 | * all the 'match->mask' fields that have been touched | |
1775 | * in 'match->key'. We cannot simply memset | |
1776 | * 'match->mask', because padding bytes and fields not | |
1777 | * specified in 'match->key' should be left to 0. | |
1778 | * Instead, we use a stream of netlink attributes, | |
1779 | * copied from 'key' and set to 0xff. | |
1780 | * ovs_key_from_nlattrs() will take care of filling | |
1781 | * 'match->mask' appropriately. | |
1782 | */ | |
1783 | newmask = kmemdup(nla_key, | |
1784 | nla_total_size(nla_len(nla_key)), | |
1785 | GFP_KERNEL); | |
1786 | if (!newmask) | |
1787 | return -ENOMEM; | |
1788 | ||
1789 | mask_set_nlattr(newmask, 0xff); | |
1790 | ||
1791 | /* The userspace does not send tunnel attributes that | |
1792 | * are 0, but we should not wildcard them nonetheless. | |
1793 | */ | |
1794 | if (match->key->tun_proto) | |
1795 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, | |
1796 | 0xff, true); | |
1797 | ||
1798 | nla_mask = newmask; | |
1799 | } | |
1800 | ||
1801 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); | |
1802 | if (err) | |
1803 | goto free_newmask; | |
1804 | ||
1805 | /* Always match on tci. */ | |
1806 | SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true); | |
1807 | SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true); | |
1808 | ||
1809 | err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log); | |
1810 | if (err) | |
1811 | goto free_newmask; | |
1812 | ||
1813 | err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true, | |
1814 | log); | |
1815 | if (err) | |
1816 | goto free_newmask; | |
1817 | } | |
1818 | ||
1819 | if (!match_validate(match, key_attrs, mask_attrs, log)) | |
1820 | err = -EINVAL; | |
1821 | ||
1822 | free_newmask: | |
1823 | kfree(newmask); | |
1824 | return err; | |
1825 | } | |
1826 | ||
1827 | static size_t get_ufid_len(const struct nlattr *attr, bool log) | |
1828 | { | |
1829 | size_t len; | |
1830 | ||
1831 | if (!attr) | |
1832 | return 0; | |
1833 | ||
1834 | len = nla_len(attr); | |
1835 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1836 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1837 | nla_len(attr), MAX_UFID_LENGTH); | |
1838 | return 0; | |
1839 | } | |
1840 | ||
1841 | return len; | |
1842 | } | |
1843 | ||
1844 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1845 | * or false otherwise. | |
1846 | */ | |
1847 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1848 | bool log) | |
1849 | { | |
1850 | sfid->ufid_len = get_ufid_len(attr, log); | |
1851 | if (sfid->ufid_len) | |
1852 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1853 | ||
1854 | return sfid->ufid_len; | |
1855 | } | |
1856 | ||
1857 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1858 | const struct sw_flow_key *key, bool log) | |
1859 | { | |
1860 | struct sw_flow_key *new_key; | |
1861 | ||
1862 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1863 | return 0; | |
1864 | ||
1865 | /* If UFID was not provided, use unmasked key. */ | |
1866 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1867 | if (!new_key) | |
1868 | return -ENOMEM; | |
1869 | memcpy(new_key, key, sizeof(*key)); | |
1870 | sfid->unmasked_key = new_key; | |
1871 | ||
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1876 | { | |
1877 | return attr ? nla_get_u32(attr) : 0; | |
1878 | } | |
1879 | ||
1880 | /** | |
1881 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
1882 | * @net: Network namespace. | |
1883 | * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack | |
1884 | * metadata. | |
1885 | * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink | |
1886 | * attributes. | |
1887 | * @attrs: Bit mask for the netlink attributes included in @a. | |
1888 | * @log: Boolean to allow kernel error logging. Normally true, but when | |
1889 | * probing for feature compatibility this should be passed in as false to | |
1890 | * suppress unnecessary error logging. | |
1891 | * | |
1892 | * This parses a series of Netlink attributes that form a flow key, which must | |
1893 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1894 | * get the metadata, that is, the parts of the flow key that cannot be | |
1895 | * extracted from the packet itself. | |
1896 | * | |
1897 | * This must be called before the packet key fields are filled in 'key'. | |
1898 | */ | |
1899 | ||
1900 | int ovs_nla_get_flow_metadata(struct net *net, | |
1901 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1], | |
1902 | u64 attrs, struct sw_flow_key *key, bool log) | |
1903 | { | |
1904 | struct sw_flow_match match; | |
1905 | ||
1906 | memset(&match, 0, sizeof(match)); | |
1907 | match.key = key; | |
1908 | ||
1909 | key->ct_state = 0; | |
1910 | key->ct_zone = 0; | |
1911 | key->ct_orig_proto = 0; | |
1912 | memset(&key->ct, 0, sizeof(key->ct)); | |
1913 | memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig)); | |
1914 | memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig)); | |
1915 | ||
1916 | key->phy.in_port = DP_MAX_PORTS; | |
1917 | ||
1918 | return metadata_from_nlattrs(net, &match, &attrs, a, false, log); | |
1919 | } | |
1920 | ||
1921 | static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh, | |
1922 | bool is_mask) | |
1923 | { | |
1924 | __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff); | |
1925 | ||
1926 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1927 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci)) | |
1928 | return -EMSGSIZE; | |
1929 | return 0; | |
1930 | } | |
1931 | ||
1932 | static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask, | |
1933 | struct sk_buff *skb) | |
1934 | { | |
1935 | struct nlattr *start; | |
1936 | ||
1937 | start = nla_nest_start(skb, OVS_KEY_ATTR_NSH); | |
1938 | if (!start) | |
1939 | return -EMSGSIZE; | |
1940 | ||
1941 | if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base)) | |
1942 | goto nla_put_failure; | |
1943 | ||
1944 | if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) { | |
1945 | if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1, | |
1946 | sizeof(nsh->context), nsh->context)) | |
1947 | goto nla_put_failure; | |
1948 | } | |
1949 | ||
1950 | /* Don't support MD type 2 yet */ | |
1951 | ||
1952 | nla_nest_end(skb, start); | |
1953 | ||
1954 | return 0; | |
1955 | ||
1956 | nla_put_failure: | |
1957 | return -EMSGSIZE; | |
1958 | } | |
1959 | ||
1960 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, | |
1961 | const struct sw_flow_key *output, bool is_mask, | |
1962 | struct sk_buff *skb) | |
1963 | { | |
1964 | struct ovs_key_ethernet *eth_key; | |
1965 | struct nlattr *nla; | |
1966 | struct nlattr *encap = NULL; | |
1967 | struct nlattr *in_encap = NULL; | |
1968 | ||
1969 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) | |
1970 | goto nla_put_failure; | |
1971 | ||
1972 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1973 | goto nla_put_failure; | |
1974 | ||
1975 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) | |
1976 | goto nla_put_failure; | |
1977 | ||
1978 | if ((swkey->tun_proto || is_mask)) { | |
1979 | const void *opts = NULL; | |
1980 | ||
1981 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
1982 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); | |
1983 | ||
1984 | if (ip_tun_to_nlattr(skb, &output->tun_key, opts, | |
1985 | swkey->tun_opts_len, swkey->tun_proto)) | |
1986 | goto nla_put_failure; | |
1987 | } | |
1988 | ||
1989 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1990 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1991 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1992 | goto nla_put_failure; | |
1993 | } else { | |
1994 | u16 upper_u16; | |
1995 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1996 | ||
1997 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1998 | (upper_u16 << 16) | output->phy.in_port)) | |
1999 | goto nla_put_failure; | |
2000 | } | |
2001 | ||
2002 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
2003 | goto nla_put_failure; | |
2004 | ||
2005 | if (ovs_ct_put_key(swkey, output, skb)) | |
2006 | goto nla_put_failure; | |
2007 | ||
2008 | if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) { | |
2009 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); | |
2010 | if (!nla) | |
2011 | goto nla_put_failure; | |
2012 | ||
2013 | eth_key = nla_data(nla); | |
2014 | ether_addr_copy(eth_key->eth_src, output->eth.src); | |
2015 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
2016 | ||
2017 | if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) { | |
2018 | if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask)) | |
2019 | goto nla_put_failure; | |
2020 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
2021 | if (!swkey->eth.vlan.tci) | |
2022 | goto unencap; | |
2023 | ||
2024 | if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) { | |
2025 | if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask)) | |
2026 | goto nla_put_failure; | |
2027 | in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
2028 | if (!swkey->eth.cvlan.tci) | |
2029 | goto unencap; | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
2034 | /* | |
2035 | * Ethertype 802.2 is represented in the netlink with omitted | |
2036 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
2037 | * 0xffff in the mask attribute. Ethertype can also | |
2038 | * be wildcarded. | |
2039 | */ | |
2040 | if (is_mask && output->eth.type) | |
2041 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
2042 | output->eth.type)) | |
2043 | goto nla_put_failure; | |
2044 | goto unencap; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
2049 | goto nla_put_failure; | |
2050 | ||
2051 | if (eth_type_vlan(swkey->eth.type)) { | |
2052 | /* There are 3 VLAN tags, we don't know anything about the rest | |
2053 | * of the packet, so truncate here. | |
2054 | */ | |
2055 | WARN_ON_ONCE(!(encap && in_encap)); | |
2056 | goto unencap; | |
2057 | } | |
2058 | ||
2059 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
2060 | struct ovs_key_ipv4 *ipv4_key; | |
2061 | ||
2062 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
2063 | if (!nla) | |
2064 | goto nla_put_failure; | |
2065 | ipv4_key = nla_data(nla); | |
2066 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
2067 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
2068 | ipv4_key->ipv4_proto = output->ip.proto; | |
2069 | ipv4_key->ipv4_tos = output->ip.tos; | |
2070 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
2071 | ipv4_key->ipv4_frag = output->ip.frag; | |
2072 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
2073 | struct ovs_key_ipv6 *ipv6_key; | |
2074 | ||
2075 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
2076 | if (!nla) | |
2077 | goto nla_put_failure; | |
2078 | ipv6_key = nla_data(nla); | |
2079 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
2080 | sizeof(ipv6_key->ipv6_src)); | |
2081 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
2082 | sizeof(ipv6_key->ipv6_dst)); | |
2083 | ipv6_key->ipv6_label = output->ipv6.label; | |
2084 | ipv6_key->ipv6_proto = output->ip.proto; | |
2085 | ipv6_key->ipv6_tclass = output->ip.tos; | |
2086 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
2087 | ipv6_key->ipv6_frag = output->ip.frag; | |
2088 | } else if (swkey->eth.type == htons(ETH_P_NSH)) { | |
2089 | if (nsh_key_to_nlattr(&output->nsh, is_mask, skb)) | |
2090 | goto nla_put_failure; | |
2091 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
2092 | swkey->eth.type == htons(ETH_P_RARP)) { | |
2093 | struct ovs_key_arp *arp_key; | |
2094 | ||
2095 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
2096 | if (!nla) | |
2097 | goto nla_put_failure; | |
2098 | arp_key = nla_data(nla); | |
2099 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
2100 | arp_key->arp_sip = output->ipv4.addr.src; | |
2101 | arp_key->arp_tip = output->ipv4.addr.dst; | |
2102 | arp_key->arp_op = htons(output->ip.proto); | |
2103 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); | |
2104 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
2105 | } else if (eth_p_mpls(swkey->eth.type)) { | |
2106 | struct ovs_key_mpls *mpls_key; | |
2107 | ||
2108 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
2109 | if (!nla) | |
2110 | goto nla_put_failure; | |
2111 | mpls_key = nla_data(nla); | |
2112 | mpls_key->mpls_lse = output->mpls.top_lse; | |
2113 | } | |
2114 | ||
2115 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
2116 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
2117 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
2118 | ||
2119 | if (swkey->ip.proto == IPPROTO_TCP) { | |
2120 | struct ovs_key_tcp *tcp_key; | |
2121 | ||
2122 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
2123 | if (!nla) | |
2124 | goto nla_put_failure; | |
2125 | tcp_key = nla_data(nla); | |
2126 | tcp_key->tcp_src = output->tp.src; | |
2127 | tcp_key->tcp_dst = output->tp.dst; | |
2128 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
2129 | output->tp.flags)) | |
2130 | goto nla_put_failure; | |
2131 | } else if (swkey->ip.proto == IPPROTO_UDP) { | |
2132 | struct ovs_key_udp *udp_key; | |
2133 | ||
2134 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
2135 | if (!nla) | |
2136 | goto nla_put_failure; | |
2137 | udp_key = nla_data(nla); | |
2138 | udp_key->udp_src = output->tp.src; | |
2139 | udp_key->udp_dst = output->tp.dst; | |
2140 | } else if (swkey->ip.proto == IPPROTO_SCTP) { | |
2141 | struct ovs_key_sctp *sctp_key; | |
2142 | ||
2143 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
2144 | if (!nla) | |
2145 | goto nla_put_failure; | |
2146 | sctp_key = nla_data(nla); | |
2147 | sctp_key->sctp_src = output->tp.src; | |
2148 | sctp_key->sctp_dst = output->tp.dst; | |
2149 | } else if (swkey->eth.type == htons(ETH_P_IP) && | |
2150 | swkey->ip.proto == IPPROTO_ICMP) { | |
2151 | struct ovs_key_icmp *icmp_key; | |
2152 | ||
2153 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
2154 | if (!nla) | |
2155 | goto nla_put_failure; | |
2156 | icmp_key = nla_data(nla); | |
2157 | icmp_key->icmp_type = ntohs(output->tp.src); | |
2158 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
2159 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && | |
2160 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
2161 | struct ovs_key_icmpv6 *icmpv6_key; | |
2162 | ||
2163 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
2164 | sizeof(*icmpv6_key)); | |
2165 | if (!nla) | |
2166 | goto nla_put_failure; | |
2167 | icmpv6_key = nla_data(nla); | |
2168 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); | |
2169 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
2170 | ||
2171 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
2172 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
2173 | struct ovs_key_nd *nd_key; | |
2174 | ||
2175 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
2176 | if (!nla) | |
2177 | goto nla_put_failure; | |
2178 | nd_key = nla_data(nla); | |
2179 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
2180 | sizeof(nd_key->nd_target)); | |
2181 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); | |
2182 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
2183 | } | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | unencap: | |
2188 | if (in_encap) | |
2189 | nla_nest_end(skb, in_encap); | |
2190 | if (encap) | |
2191 | nla_nest_end(skb, encap); | |
2192 | ||
2193 | return 0; | |
2194 | ||
2195 | nla_put_failure: | |
2196 | return -EMSGSIZE; | |
2197 | } | |
2198 | ||
2199 | int ovs_nla_put_key(const struct sw_flow_key *swkey, | |
2200 | const struct sw_flow_key *output, int attr, bool is_mask, | |
2201 | struct sk_buff *skb) | |
2202 | { | |
2203 | int err; | |
2204 | struct nlattr *nla; | |
2205 | ||
2206 | nla = nla_nest_start(skb, attr); | |
2207 | if (!nla) | |
2208 | return -EMSGSIZE; | |
2209 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
2210 | if (err) | |
2211 | return err; | |
2212 | nla_nest_end(skb, nla); | |
2213 | ||
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | /* Called with ovs_mutex or RCU read lock. */ | |
2218 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) | |
2219 | { | |
2220 | if (ovs_identifier_is_ufid(&flow->id)) | |
2221 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
2222 | flow->id.ufid); | |
2223 | ||
2224 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
2225 | OVS_FLOW_ATTR_KEY, false, skb); | |
2226 | } | |
2227 | ||
2228 | /* Called with ovs_mutex or RCU read lock. */ | |
2229 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
2230 | { | |
2231 | return ovs_nla_put_key(&flow->key, &flow->key, | |
2232 | OVS_FLOW_ATTR_KEY, false, skb); | |
2233 | } | |
2234 | ||
2235 | /* Called with ovs_mutex or RCU read lock. */ | |
2236 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
2237 | { | |
2238 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
2239 | OVS_FLOW_ATTR_MASK, true, skb); | |
2240 | } | |
2241 | ||
2242 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) | |
2243 | ||
2244 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) | |
2245 | { | |
2246 | struct sw_flow_actions *sfa; | |
2247 | ||
2248 | if (size > MAX_ACTIONS_BUFSIZE) { | |
2249 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); | |
2250 | return ERR_PTR(-EINVAL); | |
2251 | } | |
2252 | ||
2253 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
2254 | if (!sfa) | |
2255 | return ERR_PTR(-ENOMEM); | |
2256 | ||
2257 | sfa->actions_len = 0; | |
2258 | return sfa; | |
2259 | } | |
2260 | ||
2261 | static void ovs_nla_free_set_action(const struct nlattr *a) | |
2262 | { | |
2263 | const struct nlattr *ovs_key = nla_data(a); | |
2264 | struct ovs_tunnel_info *ovs_tun; | |
2265 | ||
2266 | switch (nla_type(ovs_key)) { | |
2267 | case OVS_KEY_ATTR_TUNNEL_INFO: | |
2268 | ovs_tun = nla_data(ovs_key); | |
2269 | dst_release((struct dst_entry *)ovs_tun->tun_dst); | |
2270 | break; | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
2275 | { | |
2276 | const struct nlattr *a; | |
2277 | int rem; | |
2278 | ||
2279 | if (!sf_acts) | |
2280 | return; | |
2281 | ||
2282 | nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { | |
2283 | switch (nla_type(a)) { | |
2284 | case OVS_ACTION_ATTR_SET: | |
2285 | ovs_nla_free_set_action(a); | |
2286 | break; | |
2287 | case OVS_ACTION_ATTR_CT: | |
2288 | ovs_ct_free_action(a); | |
2289 | break; | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | kfree(sf_acts); | |
2294 | } | |
2295 | ||
2296 | static void __ovs_nla_free_flow_actions(struct rcu_head *head) | |
2297 | { | |
2298 | ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); | |
2299 | } | |
2300 | ||
2301 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
2302 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
2303 | void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) | |
2304 | { | |
2305 | call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); | |
2306 | } | |
2307 | ||
2308 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
2309 | int attr_len, bool log) | |
2310 | { | |
2311 | ||
2312 | struct sw_flow_actions *acts; | |
2313 | int new_acts_size; | |
2314 | int req_size = NLA_ALIGN(attr_len); | |
2315 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
2316 | (*sfa)->actions_len; | |
2317 | ||
2318 | if (req_size <= (ksize(*sfa) - next_offset)) | |
2319 | goto out; | |
2320 | ||
2321 | new_acts_size = ksize(*sfa) * 2; | |
2322 | ||
2323 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
2324 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
2325 | return ERR_PTR(-EMSGSIZE); | |
2326 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
2327 | } | |
2328 | ||
2329 | acts = nla_alloc_flow_actions(new_acts_size, log); | |
2330 | if (IS_ERR(acts)) | |
2331 | return (void *)acts; | |
2332 | ||
2333 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
2334 | acts->actions_len = (*sfa)->actions_len; | |
2335 | acts->orig_len = (*sfa)->orig_len; | |
2336 | kfree(*sfa); | |
2337 | *sfa = acts; | |
2338 | ||
2339 | out: | |
2340 | (*sfa)->actions_len += req_size; | |
2341 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
2342 | } | |
2343 | ||
2344 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, | |
2345 | int attrtype, void *data, int len, bool log) | |
2346 | { | |
2347 | struct nlattr *a; | |
2348 | ||
2349 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); | |
2350 | if (IS_ERR(a)) | |
2351 | return a; | |
2352 | ||
2353 | a->nla_type = attrtype; | |
2354 | a->nla_len = nla_attr_size(len); | |
2355 | ||
2356 | if (data) | |
2357 | memcpy(nla_data(a), data, len); | |
2358 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
2359 | ||
2360 | return a; | |
2361 | } | |
2362 | ||
2363 | int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, | |
2364 | int len, bool log) | |
2365 | { | |
2366 | struct nlattr *a; | |
2367 | ||
2368 | a = __add_action(sfa, attrtype, data, len, log); | |
2369 | ||
2370 | return PTR_ERR_OR_ZERO(a); | |
2371 | } | |
2372 | ||
2373 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
2374 | int attrtype, bool log) | |
2375 | { | |
2376 | int used = (*sfa)->actions_len; | |
2377 | int err; | |
2378 | ||
2379 | err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); | |
2380 | if (err) | |
2381 | return err; | |
2382 | ||
2383 | return used; | |
2384 | } | |
2385 | ||
2386 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
2387 | int st_offset) | |
2388 | { | |
2389 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
2390 | st_offset); | |
2391 | ||
2392 | a->nla_len = sfa->actions_len - st_offset; | |
2393 | } | |
2394 | ||
2395 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, | |
2396 | const struct sw_flow_key *key, | |
2397 | struct sw_flow_actions **sfa, | |
2398 | __be16 eth_type, __be16 vlan_tci, bool log); | |
2399 | ||
2400 | static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, | |
2401 | const struct sw_flow_key *key, | |
2402 | struct sw_flow_actions **sfa, | |
2403 | __be16 eth_type, __be16 vlan_tci, | |
2404 | bool log, bool last) | |
2405 | { | |
2406 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
2407 | const struct nlattr *probability, *actions; | |
2408 | const struct nlattr *a; | |
2409 | int rem, start, err; | |
2410 | struct sample_arg arg; | |
2411 | ||
2412 | memset(attrs, 0, sizeof(attrs)); | |
2413 | nla_for_each_nested(a, attr, rem) { | |
2414 | int type = nla_type(a); | |
2415 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
2416 | return -EINVAL; | |
2417 | attrs[type] = a; | |
2418 | } | |
2419 | if (rem) | |
2420 | return -EINVAL; | |
2421 | ||
2422 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
2423 | if (!probability || nla_len(probability) != sizeof(u32)) | |
2424 | return -EINVAL; | |
2425 | ||
2426 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
2427 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
2428 | return -EINVAL; | |
2429 | ||
2430 | /* validation done, copy sample action. */ | |
2431 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); | |
2432 | if (start < 0) | |
2433 | return start; | |
2434 | ||
2435 | /* When both skb and flow may be changed, put the sample | |
2436 | * into a deferred fifo. On the other hand, if only skb | |
2437 | * may be modified, the actions can be executed in place. | |
2438 | * | |
2439 | * Do this analysis at the flow installation time. | |
2440 | * Set 'clone_action->exec' to true if the actions can be | |
2441 | * executed without being deferred. | |
2442 | * | |
2443 | * If the sample is the last action, it can always be excuted | |
2444 | * rather than deferred. | |
2445 | */ | |
2446 | arg.exec = last || !actions_may_change_flow(actions); | |
2447 | arg.probability = nla_get_u32(probability); | |
2448 | ||
2449 | err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg), | |
2450 | log); | |
2451 | if (err) | |
2452 | return err; | |
2453 | ||
2454 | err = __ovs_nla_copy_actions(net, actions, key, sfa, | |
2455 | eth_type, vlan_tci, log); | |
2456 | ||
2457 | if (err) | |
2458 | return err; | |
2459 | ||
2460 | add_nested_action_end(*sfa, start); | |
2461 | ||
2462 | return 0; | |
2463 | } | |
2464 | ||
2465 | void ovs_match_init(struct sw_flow_match *match, | |
2466 | struct sw_flow_key *key, | |
2467 | bool reset_key, | |
2468 | struct sw_flow_mask *mask) | |
2469 | { | |
2470 | memset(match, 0, sizeof(*match)); | |
2471 | match->key = key; | |
2472 | match->mask = mask; | |
2473 | ||
2474 | if (reset_key) | |
2475 | memset(key, 0, sizeof(*key)); | |
2476 | ||
2477 | if (mask) { | |
2478 | memset(&mask->key, 0, sizeof(mask->key)); | |
2479 | mask->range.start = mask->range.end = 0; | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | static int validate_geneve_opts(struct sw_flow_key *key) | |
2484 | { | |
2485 | struct geneve_opt *option; | |
2486 | int opts_len = key->tun_opts_len; | |
2487 | bool crit_opt = false; | |
2488 | ||
2489 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
2490 | while (opts_len > 0) { | |
2491 | int len; | |
2492 | ||
2493 | if (opts_len < sizeof(*option)) | |
2494 | return -EINVAL; | |
2495 | ||
2496 | len = sizeof(*option) + option->length * 4; | |
2497 | if (len > opts_len) | |
2498 | return -EINVAL; | |
2499 | ||
2500 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
2501 | ||
2502 | option = (struct geneve_opt *)((u8 *)option + len); | |
2503 | opts_len -= len; | |
2504 | }; | |
2505 | ||
2506 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
2507 | ||
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | static int validate_and_copy_set_tun(const struct nlattr *attr, | |
2512 | struct sw_flow_actions **sfa, bool log) | |
2513 | { | |
2514 | struct sw_flow_match match; | |
2515 | struct sw_flow_key key; | |
2516 | struct metadata_dst *tun_dst; | |
2517 | struct ip_tunnel_info *tun_info; | |
2518 | struct ovs_tunnel_info *ovs_tun; | |
2519 | struct nlattr *a; | |
2520 | int err = 0, start, opts_type; | |
2521 | ||
2522 | ovs_match_init(&match, &key, true, NULL); | |
2523 | opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log); | |
2524 | if (opts_type < 0) | |
2525 | return opts_type; | |
2526 | ||
2527 | if (key.tun_opts_len) { | |
2528 | switch (opts_type) { | |
2529 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
2530 | err = validate_geneve_opts(&key); | |
2531 | if (err < 0) | |
2532 | return err; | |
2533 | break; | |
2534 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
2535 | break; | |
2536 | case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS: | |
2537 | break; | |
2538 | } | |
2539 | }; | |
2540 | ||
2541 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); | |
2542 | if (start < 0) | |
2543 | return start; | |
2544 | ||
2545 | tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL, | |
2546 | GFP_KERNEL); | |
2547 | ||
2548 | if (!tun_dst) | |
2549 | return -ENOMEM; | |
2550 | ||
2551 | err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL); | |
2552 | if (err) { | |
2553 | dst_release((struct dst_entry *)tun_dst); | |
2554 | return err; | |
2555 | } | |
2556 | ||
2557 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, | |
2558 | sizeof(*ovs_tun), log); | |
2559 | if (IS_ERR(a)) { | |
2560 | dst_release((struct dst_entry *)tun_dst); | |
2561 | return PTR_ERR(a); | |
2562 | } | |
2563 | ||
2564 | ovs_tun = nla_data(a); | |
2565 | ovs_tun->tun_dst = tun_dst; | |
2566 | ||
2567 | tun_info = &tun_dst->u.tun_info; | |
2568 | tun_info->mode = IP_TUNNEL_INFO_TX; | |
2569 | if (key.tun_proto == AF_INET6) | |
2570 | tun_info->mode |= IP_TUNNEL_INFO_IPV6; | |
2571 | tun_info->key = key.tun_key; | |
2572 | ||
2573 | /* We need to store the options in the action itself since | |
2574 | * everything else will go away after flow setup. We can append | |
2575 | * it to tun_info and then point there. | |
2576 | */ | |
2577 | ip_tunnel_info_opts_set(tun_info, | |
2578 | TUN_METADATA_OPTS(&key, key.tun_opts_len), | |
2579 | key.tun_opts_len); | |
2580 | add_nested_action_end(*sfa, start); | |
2581 | ||
2582 | return err; | |
2583 | } | |
2584 | ||
2585 | static bool validate_nsh(const struct nlattr *attr, bool is_mask, | |
2586 | bool is_push_nsh, bool log) | |
2587 | { | |
2588 | struct sw_flow_match match; | |
2589 | struct sw_flow_key key; | |
2590 | int ret = 0; | |
2591 | ||
2592 | ovs_match_init(&match, &key, true, NULL); | |
2593 | ret = nsh_key_put_from_nlattr(attr, &match, is_mask, | |
2594 | is_push_nsh, log); | |
2595 | return !ret; | |
2596 | } | |
2597 | ||
2598 | /* Return false if there are any non-masked bits set. | |
2599 | * Mask follows data immediately, before any netlink padding. | |
2600 | */ | |
2601 | static bool validate_masked(u8 *data, int len) | |
2602 | { | |
2603 | u8 *mask = data + len; | |
2604 | ||
2605 | while (len--) | |
2606 | if (*data++ & ~*mask++) | |
2607 | return false; | |
2608 | ||
2609 | return true; | |
2610 | } | |
2611 | ||
2612 | static int validate_set(const struct nlattr *a, | |
2613 | const struct sw_flow_key *flow_key, | |
2614 | struct sw_flow_actions **sfa, bool *skip_copy, | |
2615 | u8 mac_proto, __be16 eth_type, bool masked, bool log) | |
2616 | { | |
2617 | const struct nlattr *ovs_key = nla_data(a); | |
2618 | int key_type = nla_type(ovs_key); | |
2619 | size_t key_len; | |
2620 | ||
2621 | /* There can be only one key in a action */ | |
2622 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
2623 | return -EINVAL; | |
2624 | ||
2625 | key_len = nla_len(ovs_key); | |
2626 | if (masked) | |
2627 | key_len /= 2; | |
2628 | ||
2629 | if (key_type > OVS_KEY_ATTR_MAX || | |
2630 | !check_attr_len(key_len, ovs_key_lens[key_type].len)) | |
2631 | return -EINVAL; | |
2632 | ||
2633 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) | |
2634 | return -EINVAL; | |
2635 | ||
2636 | switch (key_type) { | |
2637 | const struct ovs_key_ipv4 *ipv4_key; | |
2638 | const struct ovs_key_ipv6 *ipv6_key; | |
2639 | int err; | |
2640 | ||
2641 | case OVS_KEY_ATTR_PRIORITY: | |
2642 | case OVS_KEY_ATTR_SKB_MARK: | |
2643 | case OVS_KEY_ATTR_CT_MARK: | |
2644 | case OVS_KEY_ATTR_CT_LABELS: | |
2645 | break; | |
2646 | ||
2647 | case OVS_KEY_ATTR_ETHERNET: | |
2648 | if (mac_proto != MAC_PROTO_ETHERNET) | |
2649 | return -EINVAL; | |
2650 | break; | |
2651 | ||
2652 | case OVS_KEY_ATTR_TUNNEL: | |
2653 | if (masked) | |
2654 | return -EINVAL; /* Masked tunnel set not supported. */ | |
2655 | ||
2656 | *skip_copy = true; | |
2657 | err = validate_and_copy_set_tun(a, sfa, log); | |
2658 | if (err) | |
2659 | return err; | |
2660 | break; | |
2661 | ||
2662 | case OVS_KEY_ATTR_IPV4: | |
2663 | if (eth_type != htons(ETH_P_IP)) | |
2664 | return -EINVAL; | |
2665 | ||
2666 | ipv4_key = nla_data(ovs_key); | |
2667 | ||
2668 | if (masked) { | |
2669 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
2670 | ||
2671 | /* Non-writeable fields. */ | |
2672 | if (mask->ipv4_proto || mask->ipv4_frag) | |
2673 | return -EINVAL; | |
2674 | } else { | |
2675 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
2676 | return -EINVAL; | |
2677 | ||
2678 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
2679 | return -EINVAL; | |
2680 | } | |
2681 | break; | |
2682 | ||
2683 | case OVS_KEY_ATTR_IPV6: | |
2684 | if (eth_type != htons(ETH_P_IPV6)) | |
2685 | return -EINVAL; | |
2686 | ||
2687 | ipv6_key = nla_data(ovs_key); | |
2688 | ||
2689 | if (masked) { | |
2690 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
2691 | ||
2692 | /* Non-writeable fields. */ | |
2693 | if (mask->ipv6_proto || mask->ipv6_frag) | |
2694 | return -EINVAL; | |
2695 | ||
2696 | /* Invalid bits in the flow label mask? */ | |
2697 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
2698 | return -EINVAL; | |
2699 | } else { | |
2700 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
2701 | return -EINVAL; | |
2702 | ||
2703 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
2704 | return -EINVAL; | |
2705 | } | |
2706 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) | |
2707 | return -EINVAL; | |
2708 | ||
2709 | break; | |
2710 | ||
2711 | case OVS_KEY_ATTR_TCP: | |
2712 | if ((eth_type != htons(ETH_P_IP) && | |
2713 | eth_type != htons(ETH_P_IPV6)) || | |
2714 | flow_key->ip.proto != IPPROTO_TCP) | |
2715 | return -EINVAL; | |
2716 | ||
2717 | break; | |
2718 | ||
2719 | case OVS_KEY_ATTR_UDP: | |
2720 | if ((eth_type != htons(ETH_P_IP) && | |
2721 | eth_type != htons(ETH_P_IPV6)) || | |
2722 | flow_key->ip.proto != IPPROTO_UDP) | |
2723 | return -EINVAL; | |
2724 | ||
2725 | break; | |
2726 | ||
2727 | case OVS_KEY_ATTR_MPLS: | |
2728 | if (!eth_p_mpls(eth_type)) | |
2729 | return -EINVAL; | |
2730 | break; | |
2731 | ||
2732 | case OVS_KEY_ATTR_SCTP: | |
2733 | if ((eth_type != htons(ETH_P_IP) && | |
2734 | eth_type != htons(ETH_P_IPV6)) || | |
2735 | flow_key->ip.proto != IPPROTO_SCTP) | |
2736 | return -EINVAL; | |
2737 | ||
2738 | break; | |
2739 | ||
2740 | case OVS_KEY_ATTR_NSH: | |
2741 | if (eth_type != htons(ETH_P_NSH)) | |
2742 | return -EINVAL; | |
2743 | if (!validate_nsh(nla_data(a), masked, false, log)) | |
2744 | return -EINVAL; | |
2745 | break; | |
2746 | ||
2747 | default: | |
2748 | return -EINVAL; | |
2749 | } | |
2750 | ||
2751 | /* Convert non-masked non-tunnel set actions to masked set actions. */ | |
2752 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
2753 | int start, len = key_len * 2; | |
2754 | struct nlattr *at; | |
2755 | ||
2756 | *skip_copy = true; | |
2757 | ||
2758 | start = add_nested_action_start(sfa, | |
2759 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
2760 | log); | |
2761 | if (start < 0) | |
2762 | return start; | |
2763 | ||
2764 | at = __add_action(sfa, key_type, NULL, len, log); | |
2765 | if (IS_ERR(at)) | |
2766 | return PTR_ERR(at); | |
2767 | ||
2768 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
2769 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
2770 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
2771 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
2772 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
2773 | ||
2774 | mask->ipv6_label &= htonl(0x000FFFFF); | |
2775 | } | |
2776 | add_nested_action_end(*sfa, start); | |
2777 | } | |
2778 | ||
2779 | return 0; | |
2780 | } | |
2781 | ||
2782 | static int validate_userspace(const struct nlattr *attr) | |
2783 | { | |
2784 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
2785 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
2786 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
2787 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, | |
2788 | }; | |
2789 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
2790 | int error; | |
2791 | ||
2792 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, attr, | |
2793 | userspace_policy, NULL); | |
2794 | if (error) | |
2795 | return error; | |
2796 | ||
2797 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
2798 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
2799 | return -EINVAL; | |
2800 | ||
2801 | return 0; | |
2802 | } | |
2803 | ||
2804 | static int copy_action(const struct nlattr *from, | |
2805 | struct sw_flow_actions **sfa, bool log) | |
2806 | { | |
2807 | int totlen = NLA_ALIGN(from->nla_len); | |
2808 | struct nlattr *to; | |
2809 | ||
2810 | to = reserve_sfa_size(sfa, from->nla_len, log); | |
2811 | if (IS_ERR(to)) | |
2812 | return PTR_ERR(to); | |
2813 | ||
2814 | memcpy(to, from, totlen); | |
2815 | return 0; | |
2816 | } | |
2817 | ||
2818 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, | |
2819 | const struct sw_flow_key *key, | |
2820 | struct sw_flow_actions **sfa, | |
2821 | __be16 eth_type, __be16 vlan_tci, bool log) | |
2822 | { | |
2823 | u8 mac_proto = ovs_key_mac_proto(key); | |
2824 | const struct nlattr *a; | |
2825 | int rem, err; | |
2826 | ||
2827 | nla_for_each_nested(a, attr, rem) { | |
2828 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2829 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2830 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
2831 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), | |
2832 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, | |
2833 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), | |
2834 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
2835 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), | |
2836 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2837 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
2838 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, | |
2839 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, | |
2840 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), | |
2841 | [OVS_ACTION_ATTR_CT] = (u32)-1, | |
2842 | [OVS_ACTION_ATTR_CT_CLEAR] = 0, | |
2843 | [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc), | |
2844 | [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth), | |
2845 | [OVS_ACTION_ATTR_POP_ETH] = 0, | |
2846 | [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1, | |
2847 | [OVS_ACTION_ATTR_POP_NSH] = 0, | |
2848 | [OVS_ACTION_ATTR_METER] = sizeof(u32), | |
2849 | }; | |
2850 | const struct ovs_action_push_vlan *vlan; | |
2851 | int type = nla_type(a); | |
2852 | bool skip_copy; | |
2853 | ||
2854 | if (type > OVS_ACTION_ATTR_MAX || | |
2855 | (action_lens[type] != nla_len(a) && | |
2856 | action_lens[type] != (u32)-1)) | |
2857 | return -EINVAL; | |
2858 | ||
2859 | skip_copy = false; | |
2860 | switch (type) { | |
2861 | case OVS_ACTION_ATTR_UNSPEC: | |
2862 | return -EINVAL; | |
2863 | ||
2864 | case OVS_ACTION_ATTR_USERSPACE: | |
2865 | err = validate_userspace(a); | |
2866 | if (err) | |
2867 | return err; | |
2868 | break; | |
2869 | ||
2870 | case OVS_ACTION_ATTR_OUTPUT: | |
2871 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2872 | return -EINVAL; | |
2873 | break; | |
2874 | ||
2875 | case OVS_ACTION_ATTR_TRUNC: { | |
2876 | const struct ovs_action_trunc *trunc = nla_data(a); | |
2877 | ||
2878 | if (trunc->max_len < ETH_HLEN) | |
2879 | return -EINVAL; | |
2880 | break; | |
2881 | } | |
2882 | ||
2883 | case OVS_ACTION_ATTR_HASH: { | |
2884 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2885 | ||
2886 | switch (act_hash->hash_alg) { | |
2887 | case OVS_HASH_ALG_L4: | |
2888 | break; | |
2889 | default: | |
2890 | return -EINVAL; | |
2891 | } | |
2892 | ||
2893 | break; | |
2894 | } | |
2895 | ||
2896 | case OVS_ACTION_ATTR_POP_VLAN: | |
2897 | if (mac_proto != MAC_PROTO_ETHERNET) | |
2898 | return -EINVAL; | |
2899 | vlan_tci = htons(0); | |
2900 | break; | |
2901 | ||
2902 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2903 | if (mac_proto != MAC_PROTO_ETHERNET) | |
2904 | return -EINVAL; | |
2905 | vlan = nla_data(a); | |
2906 | if (!eth_type_vlan(vlan->vlan_tpid)) | |
2907 | return -EINVAL; | |
2908 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2909 | return -EINVAL; | |
2910 | vlan_tci = vlan->vlan_tci; | |
2911 | break; | |
2912 | ||
2913 | case OVS_ACTION_ATTR_RECIRC: | |
2914 | break; | |
2915 | ||
2916 | case OVS_ACTION_ATTR_PUSH_MPLS: { | |
2917 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2918 | ||
2919 | if (!eth_p_mpls(mpls->mpls_ethertype)) | |
2920 | return -EINVAL; | |
2921 | /* Prohibit push MPLS other than to a white list | |
2922 | * for packets that have a known tag order. | |
2923 | */ | |
2924 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2925 | (eth_type != htons(ETH_P_IP) && | |
2926 | eth_type != htons(ETH_P_IPV6) && | |
2927 | eth_type != htons(ETH_P_ARP) && | |
2928 | eth_type != htons(ETH_P_RARP) && | |
2929 | !eth_p_mpls(eth_type))) | |
2930 | return -EINVAL; | |
2931 | eth_type = mpls->mpls_ethertype; | |
2932 | break; | |
2933 | } | |
2934 | ||
2935 | case OVS_ACTION_ATTR_POP_MPLS: | |
2936 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2937 | !eth_p_mpls(eth_type)) | |
2938 | return -EINVAL; | |
2939 | ||
2940 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2941 | * as there is no check here to ensure that the new | |
2942 | * eth_type is valid and thus set actions could | |
2943 | * write off the end of the packet or otherwise | |
2944 | * corrupt it. | |
2945 | * | |
2946 | * Support for these actions is planned using packet | |
2947 | * recirculation. | |
2948 | */ | |
2949 | eth_type = htons(0); | |
2950 | break; | |
2951 | ||
2952 | case OVS_ACTION_ATTR_SET: | |
2953 | err = validate_set(a, key, sfa, | |
2954 | &skip_copy, mac_proto, eth_type, | |
2955 | false, log); | |
2956 | if (err) | |
2957 | return err; | |
2958 | break; | |
2959 | ||
2960 | case OVS_ACTION_ATTR_SET_MASKED: | |
2961 | err = validate_set(a, key, sfa, | |
2962 | &skip_copy, mac_proto, eth_type, | |
2963 | true, log); | |
2964 | if (err) | |
2965 | return err; | |
2966 | break; | |
2967 | ||
2968 | case OVS_ACTION_ATTR_SAMPLE: { | |
2969 | bool last = nla_is_last(a, rem); | |
2970 | ||
2971 | err = validate_and_copy_sample(net, a, key, sfa, | |
2972 | eth_type, vlan_tci, | |
2973 | log, last); | |
2974 | if (err) | |
2975 | return err; | |
2976 | skip_copy = true; | |
2977 | break; | |
2978 | } | |
2979 | ||
2980 | case OVS_ACTION_ATTR_CT: | |
2981 | err = ovs_ct_copy_action(net, a, key, sfa, log); | |
2982 | if (err) | |
2983 | return err; | |
2984 | skip_copy = true; | |
2985 | break; | |
2986 | ||
2987 | case OVS_ACTION_ATTR_CT_CLEAR: | |
2988 | break; | |
2989 | ||
2990 | case OVS_ACTION_ATTR_PUSH_ETH: | |
2991 | /* Disallow pushing an Ethernet header if one | |
2992 | * is already present */ | |
2993 | if (mac_proto != MAC_PROTO_NONE) | |
2994 | return -EINVAL; | |
2995 | mac_proto = MAC_PROTO_NONE; | |
2996 | break; | |
2997 | ||
2998 | case OVS_ACTION_ATTR_POP_ETH: | |
2999 | if (mac_proto != MAC_PROTO_ETHERNET) | |
3000 | return -EINVAL; | |
3001 | if (vlan_tci & htons(VLAN_TAG_PRESENT)) | |
3002 | return -EINVAL; | |
3003 | mac_proto = MAC_PROTO_ETHERNET; | |
3004 | break; | |
3005 | ||
3006 | case OVS_ACTION_ATTR_PUSH_NSH: | |
3007 | if (mac_proto != MAC_PROTO_ETHERNET) { | |
3008 | u8 next_proto; | |
3009 | ||
3010 | next_proto = tun_p_from_eth_p(eth_type); | |
3011 | if (!next_proto) | |
3012 | return -EINVAL; | |
3013 | } | |
3014 | mac_proto = MAC_PROTO_NONE; | |
3015 | if (!validate_nsh(nla_data(a), false, true, true)) | |
3016 | return -EINVAL; | |
3017 | break; | |
3018 | ||
3019 | case OVS_ACTION_ATTR_POP_NSH: { | |
3020 | __be16 inner_proto; | |
3021 | ||
3022 | if (eth_type != htons(ETH_P_NSH)) | |
3023 | return -EINVAL; | |
3024 | inner_proto = tun_p_to_eth_p(key->nsh.base.np); | |
3025 | if (!inner_proto) | |
3026 | return -EINVAL; | |
3027 | if (key->nsh.base.np == TUN_P_ETHERNET) | |
3028 | mac_proto = MAC_PROTO_ETHERNET; | |
3029 | else | |
3030 | mac_proto = MAC_PROTO_NONE; | |
3031 | break; | |
3032 | } | |
3033 | ||
3034 | case OVS_ACTION_ATTR_METER: | |
3035 | /* Non-existent meters are simply ignored. */ | |
3036 | break; | |
3037 | ||
3038 | default: | |
3039 | OVS_NLERR(log, "Unknown Action type %d", type); | |
3040 | return -EINVAL; | |
3041 | } | |
3042 | if (!skip_copy) { | |
3043 | err = copy_action(a, sfa, log); | |
3044 | if (err) | |
3045 | return err; | |
3046 | } | |
3047 | } | |
3048 | ||
3049 | if (rem > 0) | |
3050 | return -EINVAL; | |
3051 | ||
3052 | return 0; | |
3053 | } | |
3054 | ||
3055 | /* 'key' must be the masked key. */ | |
3056 | int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, | |
3057 | const struct sw_flow_key *key, | |
3058 | struct sw_flow_actions **sfa, bool log) | |
3059 | { | |
3060 | int err; | |
3061 | ||
3062 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); | |
3063 | if (IS_ERR(*sfa)) | |
3064 | return PTR_ERR(*sfa); | |
3065 | ||
3066 | (*sfa)->orig_len = nla_len(attr); | |
3067 | err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type, | |
3068 | key->eth.vlan.tci, log); | |
3069 | if (err) | |
3070 | ovs_nla_free_flow_actions(*sfa); | |
3071 | ||
3072 | return err; | |
3073 | } | |
3074 | ||
3075 | static int sample_action_to_attr(const struct nlattr *attr, | |
3076 | struct sk_buff *skb) | |
3077 | { | |
3078 | struct nlattr *start, *ac_start = NULL, *sample_arg; | |
3079 | int err = 0, rem = nla_len(attr); | |
3080 | const struct sample_arg *arg; | |
3081 | struct nlattr *actions; | |
3082 | ||
3083 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
3084 | if (!start) | |
3085 | return -EMSGSIZE; | |
3086 | ||
3087 | sample_arg = nla_data(attr); | |
3088 | arg = nla_data(sample_arg); | |
3089 | actions = nla_next(sample_arg, &rem); | |
3090 | ||
3091 | if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) { | |
3092 | err = -EMSGSIZE; | |
3093 | goto out; | |
3094 | } | |
3095 | ||
3096 | ac_start = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
3097 | if (!ac_start) { | |
3098 | err = -EMSGSIZE; | |
3099 | goto out; | |
3100 | } | |
3101 | ||
3102 | err = ovs_nla_put_actions(actions, rem, skb); | |
3103 | ||
3104 | out: | |
3105 | if (err) { | |
3106 | nla_nest_cancel(skb, ac_start); | |
3107 | nla_nest_cancel(skb, start); | |
3108 | } else { | |
3109 | nla_nest_end(skb, ac_start); | |
3110 | nla_nest_end(skb, start); | |
3111 | } | |
3112 | ||
3113 | return err; | |
3114 | } | |
3115 | ||
3116 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
3117 | { | |
3118 | const struct nlattr *ovs_key = nla_data(a); | |
3119 | int key_type = nla_type(ovs_key); | |
3120 | struct nlattr *start; | |
3121 | int err; | |
3122 | ||
3123 | switch (key_type) { | |
3124 | case OVS_KEY_ATTR_TUNNEL_INFO: { | |
3125 | struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); | |
3126 | struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; | |
3127 | ||
3128 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
3129 | if (!start) | |
3130 | return -EMSGSIZE; | |
3131 | ||
3132 | err = ip_tun_to_nlattr(skb, &tun_info->key, | |
3133 | ip_tunnel_info_opts(tun_info), | |
3134 | tun_info->options_len, | |
3135 | ip_tunnel_info_af(tun_info)); | |
3136 | if (err) | |
3137 | return err; | |
3138 | nla_nest_end(skb, start); | |
3139 | break; | |
3140 | } | |
3141 | default: | |
3142 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
3143 | return -EMSGSIZE; | |
3144 | break; | |
3145 | } | |
3146 | ||
3147 | return 0; | |
3148 | } | |
3149 | ||
3150 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, | |
3151 | struct sk_buff *skb) | |
3152 | { | |
3153 | const struct nlattr *ovs_key = nla_data(a); | |
3154 | struct nlattr *nla; | |
3155 | size_t key_len = nla_len(ovs_key) / 2; | |
3156 | ||
3157 | /* Revert the conversion we did from a non-masked set action to | |
3158 | * masked set action. | |
3159 | */ | |
3160 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); | |
3161 | if (!nla) | |
3162 | return -EMSGSIZE; | |
3163 | ||
3164 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) | |
3165 | return -EMSGSIZE; | |
3166 | ||
3167 | nla_nest_end(skb, nla); | |
3168 | return 0; | |
3169 | } | |
3170 | ||
3171 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) | |
3172 | { | |
3173 | const struct nlattr *a; | |
3174 | int rem, err; | |
3175 | ||
3176 | nla_for_each_attr(a, attr, len, rem) { | |
3177 | int type = nla_type(a); | |
3178 | ||
3179 | switch (type) { | |
3180 | case OVS_ACTION_ATTR_SET: | |
3181 | err = set_action_to_attr(a, skb); | |
3182 | if (err) | |
3183 | return err; | |
3184 | break; | |
3185 | ||
3186 | case OVS_ACTION_ATTR_SET_TO_MASKED: | |
3187 | err = masked_set_action_to_set_action_attr(a, skb); | |
3188 | if (err) | |
3189 | return err; | |
3190 | break; | |
3191 | ||
3192 | case OVS_ACTION_ATTR_SAMPLE: | |
3193 | err = sample_action_to_attr(a, skb); | |
3194 | if (err) | |
3195 | return err; | |
3196 | break; | |
3197 | ||
3198 | case OVS_ACTION_ATTR_CT: | |
3199 | err = ovs_ct_action_to_attr(nla_data(a), skb); | |
3200 | if (err) | |
3201 | return err; | |
3202 | break; | |
3203 | ||
3204 | default: | |
3205 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
3206 | return -EMSGSIZE; | |
3207 | break; | |
3208 | } | |
3209 | } | |
3210 | ||
3211 | return 0; | |
3212 | } |