]>
Commit | Line | Data |
---|---|---|
e6445719 | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
e6445719 PS |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
2235ad1c JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
e6445719 PS |
21 | #include "flow.h" |
22 | #include "datapath.h" | |
23 | #include <linux/uaccess.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
28 | #include <net/llc_pdu.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/jhash.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/llc.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/in.h> | |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/ip.h> | |
38 | #include <linux/ipv6.h> | |
39 | #include <linux/sctp.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/udp.h> | |
42 | #include <linux/icmp.h> | |
43 | #include <linux/icmpv6.h> | |
44 | #include <linux/rculist.h> | |
f5796684 | 45 | #include <net/geneve.h> |
e6445719 PS |
46 | #include <net/ip.h> |
47 | #include <net/ipv6.h> | |
48 | #include <net/ndisc.h> | |
25cd9ba0 | 49 | #include <net/mpls.h> |
e6445719 PS |
50 | |
51 | #include "flow_netlink.h" | |
1dd144cf | 52 | #include "vport-vxlan.h" |
e6445719 | 53 | |
81bfe3c3 TG |
54 | struct ovs_len_tbl { |
55 | int len; | |
56 | const struct ovs_len_tbl *next; | |
57 | }; | |
58 | ||
59 | #define OVS_ATTR_NESTED -1 | |
60 | ||
a85311bf PS |
61 | static void update_range(struct sw_flow_match *match, |
62 | size_t offset, size_t size, bool is_mask) | |
e6445719 | 63 | { |
a85311bf | 64 | struct sw_flow_key_range *range; |
e6445719 PS |
65 | size_t start = rounddown(offset, sizeof(long)); |
66 | size_t end = roundup(offset + size, sizeof(long)); | |
67 | ||
68 | if (!is_mask) | |
69 | range = &match->range; | |
a85311bf | 70 | else |
e6445719 PS |
71 | range = &match->mask->range; |
72 | ||
e6445719 PS |
73 | if (range->start == range->end) { |
74 | range->start = start; | |
75 | range->end = end; | |
76 | return; | |
77 | } | |
78 | ||
79 | if (range->start > start) | |
80 | range->start = start; | |
81 | ||
82 | if (range->end < end) | |
83 | range->end = end; | |
84 | } | |
85 | ||
86 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
87 | do { \ | |
a85311bf PS |
88 | update_range(match, offsetof(struct sw_flow_key, field), \ |
89 | sizeof((match)->key->field), is_mask); \ | |
90 | if (is_mask) \ | |
91 | (match)->mask->key.field = value; \ | |
92 | else \ | |
e6445719 | 93 | (match)->key->field = value; \ |
e6445719 PS |
94 | } while (0) |
95 | ||
f5796684 JG |
96 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
97 | do { \ | |
a85311bf | 98 | update_range(match, offset, len, is_mask); \ |
f5796684 JG |
99 | if (is_mask) \ |
100 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
a85311bf | 101 | len); \ |
f5796684 JG |
102 | else \ |
103 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
e6445719 PS |
104 | } while (0) |
105 | ||
f5796684 JG |
106 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
107 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
108 | value_p, len, is_mask) | |
109 | ||
a85311bf PS |
110 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ |
111 | do { \ | |
112 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
113 | sizeof((match)->key->field), is_mask); \ | |
114 | if (is_mask) \ | |
115 | memset((u8 *)&(match)->mask->key.field, value, \ | |
116 | sizeof((match)->mask->key.field)); \ | |
117 | else \ | |
f47de068 PS |
118 | memset((u8 *)&(match)->key->field, value, \ |
119 | sizeof((match)->key->field)); \ | |
f47de068 | 120 | } while (0) |
e6445719 PS |
121 | |
122 | static bool match_validate(const struct sw_flow_match *match, | |
05da5898 | 123 | u64 key_attrs, u64 mask_attrs, bool log) |
e6445719 PS |
124 | { |
125 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
126 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
127 | ||
128 | /* The following mask attributes allowed only if they | |
129 | * pass the validation tests. */ | |
130 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
131 | | (1 << OVS_KEY_ATTR_IPV6) | |
132 | | (1 << OVS_KEY_ATTR_TCP) | |
5eb26b15 | 133 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
e6445719 PS |
134 | | (1 << OVS_KEY_ATTR_UDP) |
135 | | (1 << OVS_KEY_ATTR_SCTP) | |
136 | | (1 << OVS_KEY_ATTR_ICMP) | |
137 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
138 | | (1 << OVS_KEY_ATTR_ARP) | |
25cd9ba0 SH |
139 | | (1 << OVS_KEY_ATTR_ND) |
140 | | (1 << OVS_KEY_ATTR_MPLS)); | |
e6445719 PS |
141 | |
142 | /* Always allowed mask fields. */ | |
143 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
144 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
145 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
146 | ||
147 | /* Check key attributes. */ | |
148 | if (match->key->eth.type == htons(ETH_P_ARP) | |
149 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
150 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
f2a01517 | 151 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
e6445719 PS |
152 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; |
153 | } | |
154 | ||
25cd9ba0 SH |
155 | if (eth_p_mpls(match->key->eth.type)) { |
156 | key_expected |= 1 << OVS_KEY_ATTR_MPLS; | |
157 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
158 | mask_allowed |= 1 << OVS_KEY_ATTR_MPLS; | |
159 | } | |
160 | ||
e6445719 PS |
161 | if (match->key->eth.type == htons(ETH_P_IP)) { |
162 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
163 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
164 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
165 | ||
166 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
167 | if (match->key->ip.proto == IPPROTO_UDP) { | |
168 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
169 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
170 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
171 | } | |
172 | ||
173 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
174 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
175 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
176 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
177 | } | |
178 | ||
179 | if (match->key->ip.proto == IPPROTO_TCP) { | |
180 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
181 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
182 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 183 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
184 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
185 | } | |
e6445719 PS |
186 | } |
187 | ||
188 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
189 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
190 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
191 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
197 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
198 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
199 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
200 | ||
201 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
202 | if (match->key->ip.proto == IPPROTO_UDP) { | |
203 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
204 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
205 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
206 | } | |
207 | ||
208 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
209 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
210 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
211 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
212 | } | |
213 | ||
214 | if (match->key->ip.proto == IPPROTO_TCP) { | |
215 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
216 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
217 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 218 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
219 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
220 | } | |
e6445719 PS |
221 | } |
222 | ||
223 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
224 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
225 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
226 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
227 | ||
1139e241 | 228 | if (match->key->tp.src == |
e6445719 | 229 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
1139e241 | 230 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
e6445719 | 231 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
f2a01517 | 232 | if (match->mask && (match->mask->key.tp.src == htons(0xff))) |
e6445719 PS |
233 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
234 | } | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | if ((key_attrs & key_expected) != key_expected) { | |
240 | /* Key attributes check failed. */ | |
05da5898 JR |
241 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", |
242 | (unsigned long long)key_attrs, | |
243 | (unsigned long long)key_expected); | |
e6445719 PS |
244 | return false; |
245 | } | |
246 | ||
247 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
248 | /* Mask attributes check failed. */ | |
05da5898 JR |
249 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", |
250 | (unsigned long long)mask_attrs, | |
251 | (unsigned long long)mask_allowed); | |
e6445719 PS |
252 | return false; |
253 | } | |
254 | ||
255 | return true; | |
256 | } | |
257 | ||
8f0aad6f WZ |
258 | size_t ovs_tun_key_attr_size(void) |
259 | { | |
260 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
261 | * updating this function. | |
262 | */ | |
263 | return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
264 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
265 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
266 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
267 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
268 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
269 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
270 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
271 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
1dd144cf TG |
272 | /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with |
273 | * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it. | |
274 | */ | |
8f0aad6f WZ |
275 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ |
276 | + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
277 | } | |
278 | ||
41af73e9 JS |
279 | size_t ovs_key_attr_size(void) |
280 | { | |
281 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
282 | * updating this function. | |
283 | */ | |
284 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 22); | |
285 | ||
286 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
287 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
8f0aad6f | 288 | + ovs_tun_key_attr_size() |
41af73e9 JS |
289 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
290 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
291 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
292 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
293 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
294 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
295 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
296 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
297 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
298 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
299 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
300 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
301 | } | |
302 | ||
81bfe3c3 TG |
303 | static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
304 | [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) }, | |
305 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) }, | |
306 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) }, | |
307 | [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 }, | |
308 | [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 }, | |
309 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 }, | |
310 | [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 }, | |
311 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) }, | |
312 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) }, | |
313 | [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 }, | |
314 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_NESTED }, | |
1dd144cf | 315 | [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED }, |
81bfe3c3 TG |
316 | }; |
317 | ||
e6445719 | 318 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
81bfe3c3 TG |
319 | static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
320 | [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED }, | |
321 | [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) }, | |
322 | [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) }, | |
323 | [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) }, | |
324 | [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) }, | |
325 | [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) }, | |
326 | [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) }, | |
327 | [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) }, | |
328 | [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) }, | |
329 | [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) }, | |
330 | [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) }, | |
331 | [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) }, | |
332 | [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) }, | |
333 | [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) }, | |
334 | [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) }, | |
335 | [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) }, | |
336 | [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) }, | |
337 | [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) }, | |
338 | [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) }, | |
339 | [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, | |
340 | .next = ovs_tunnel_key_lens, }, | |
341 | [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, | |
e6445719 PS |
342 | }; |
343 | ||
344 | static bool is_all_zero(const u8 *fp, size_t size) | |
345 | { | |
346 | int i; | |
347 | ||
348 | if (!fp) | |
349 | return false; | |
350 | ||
351 | for (i = 0; i < size; i++) | |
352 | if (fp[i]) | |
353 | return false; | |
354 | ||
355 | return true; | |
356 | } | |
357 | ||
358 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
359 | const struct nlattr *a[], | |
05da5898 | 360 | u64 *attrsp, bool log, bool nz) |
e6445719 PS |
361 | { |
362 | const struct nlattr *nla; | |
363 | u64 attrs; | |
364 | int rem; | |
365 | ||
366 | attrs = *attrsp; | |
367 | nla_for_each_nested(nla, attr, rem) { | |
368 | u16 type = nla_type(nla); | |
369 | int expected_len; | |
370 | ||
371 | if (type > OVS_KEY_ATTR_MAX) { | |
05da5898 | 372 | OVS_NLERR(log, "Key type %d is out of range max %d", |
e6445719 PS |
373 | type, OVS_KEY_ATTR_MAX); |
374 | return -EINVAL; | |
375 | } | |
376 | ||
377 | if (attrs & (1 << type)) { | |
05da5898 | 378 | OVS_NLERR(log, "Duplicate key (type %d).", type); |
e6445719 PS |
379 | return -EINVAL; |
380 | } | |
381 | ||
81bfe3c3 TG |
382 | expected_len = ovs_key_lens[type].len; |
383 | if (nla_len(nla) != expected_len && expected_len != OVS_ATTR_NESTED) { | |
05da5898 JR |
384 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", |
385 | type, nla_len(nla), expected_len); | |
e6445719 PS |
386 | return -EINVAL; |
387 | } | |
388 | ||
389 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
390 | attrs |= 1 << type; | |
391 | a[type] = nla; | |
392 | } | |
393 | } | |
394 | if (rem) { | |
05da5898 | 395 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); |
e6445719 PS |
396 | return -EINVAL; |
397 | } | |
398 | ||
399 | *attrsp = attrs; | |
400 | return 0; | |
401 | } | |
402 | ||
403 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
404 | const struct nlattr *a[], u64 *attrsp, |
405 | bool log) | |
e6445719 | 406 | { |
05da5898 | 407 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); |
e6445719 PS |
408 | } |
409 | ||
410 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
411 | const struct nlattr *a[], u64 *attrsp, |
412 | bool log) | |
e6445719 | 413 | { |
05da5898 JR |
414 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); |
415 | } | |
416 | ||
417 | static int genev_tun_opt_from_nlattr(const struct nlattr *a, | |
418 | struct sw_flow_match *match, bool is_mask, | |
419 | bool log) | |
420 | { | |
421 | unsigned long opt_key_offset; | |
422 | ||
423 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
424 | OVS_NLERR(log, "Geneve option length err (len %d, max %zu).", | |
425 | nla_len(a), sizeof(match->key->tun_opts)); | |
426 | return -EINVAL; | |
427 | } | |
428 | ||
429 | if (nla_len(a) % 4 != 0) { | |
430 | OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.", | |
431 | nla_len(a)); | |
432 | return -EINVAL; | |
433 | } | |
434 | ||
435 | /* We need to record the length of the options passed | |
436 | * down, otherwise packets with the same format but | |
437 | * additional options will be silently matched. | |
438 | */ | |
439 | if (!is_mask) { | |
440 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
441 | false); | |
442 | } else { | |
443 | /* This is somewhat unusual because it looks at | |
444 | * both the key and mask while parsing the | |
445 | * attributes (and by extension assumes the key | |
446 | * is parsed first). Normally, we would verify | |
447 | * that each is the correct length and that the | |
448 | * attributes line up in the validate function. | |
449 | * However, that is difficult because this is | |
450 | * variable length and we won't have the | |
451 | * information later. | |
452 | */ | |
453 | if (match->key->tun_opts_len != nla_len(a)) { | |
454 | OVS_NLERR(log, "Geneve option len %d != mask len %d", | |
455 | match->key->tun_opts_len, nla_len(a)); | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
459 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
460 | } | |
461 | ||
d91641d9 | 462 | opt_key_offset = TUN_METADATA_OFFSET(nla_len(a)); |
05da5898 JR |
463 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), |
464 | nla_len(a), is_mask); | |
465 | return 0; | |
e6445719 PS |
466 | } |
467 | ||
1dd144cf TG |
468 | static const struct nla_policy vxlan_opt_policy[OVS_VXLAN_EXT_MAX + 1] = { |
469 | [OVS_VXLAN_EXT_GBP] = { .type = NLA_U32 }, | |
470 | }; | |
471 | ||
472 | static int vxlan_tun_opt_from_nlattr(const struct nlattr *a, | |
473 | struct sw_flow_match *match, bool is_mask, | |
474 | bool log) | |
475 | { | |
476 | struct nlattr *tb[OVS_VXLAN_EXT_MAX+1]; | |
477 | unsigned long opt_key_offset; | |
478 | struct ovs_vxlan_opts opts; | |
479 | int err; | |
480 | ||
481 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
482 | ||
483 | err = nla_parse_nested(tb, OVS_VXLAN_EXT_MAX, a, vxlan_opt_policy); | |
484 | if (err < 0) | |
485 | return err; | |
486 | ||
487 | memset(&opts, 0, sizeof(opts)); | |
488 | ||
489 | if (tb[OVS_VXLAN_EXT_GBP]) | |
490 | opts.gbp = nla_get_u32(tb[OVS_VXLAN_EXT_GBP]); | |
491 | ||
492 | if (!is_mask) | |
493 | SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false); | |
494 | else | |
495 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
496 | ||
497 | opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts)); | |
498 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts), | |
499 | is_mask); | |
500 | return 0; | |
501 | } | |
502 | ||
e6445719 | 503 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, |
05da5898 JR |
504 | struct sw_flow_match *match, bool is_mask, |
505 | bool log) | |
e6445719 PS |
506 | { |
507 | struct nlattr *a; | |
508 | int rem; | |
509 | bool ttl = false; | |
510 | __be16 tun_flags = 0; | |
1dd144cf | 511 | int opts_type = 0; |
e6445719 PS |
512 | |
513 | nla_for_each_nested(a, attr, rem) { | |
514 | int type = nla_type(a); | |
05da5898 JR |
515 | int err; |
516 | ||
e6445719 | 517 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
05da5898 JR |
518 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", |
519 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
e6445719 PS |
520 | return -EINVAL; |
521 | } | |
522 | ||
81bfe3c3 TG |
523 | if (ovs_tunnel_key_lens[type].len != nla_len(a) && |
524 | ovs_tunnel_key_lens[type].len != OVS_ATTR_NESTED) { | |
05da5898 | 525 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", |
81bfe3c3 | 526 | type, nla_len(a), ovs_tunnel_key_lens[type].len); |
e6445719 PS |
527 | return -EINVAL; |
528 | } | |
529 | ||
530 | switch (type) { | |
531 | case OVS_TUNNEL_KEY_ATTR_ID: | |
532 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
533 | nla_get_be64(a), is_mask); | |
534 | tun_flags |= TUNNEL_KEY; | |
535 | break; | |
536 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
537 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, | |
67b61f6c | 538 | nla_get_in_addr(a), is_mask); |
e6445719 PS |
539 | break; |
540 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
541 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, | |
67b61f6c | 542 | nla_get_in_addr(a), is_mask); |
e6445719 PS |
543 | break; |
544 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
545 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, | |
546 | nla_get_u8(a), is_mask); | |
547 | break; | |
548 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
549 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, | |
550 | nla_get_u8(a), is_mask); | |
551 | ttl = true; | |
552 | break; | |
553 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
554 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
555 | break; | |
556 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
557 | tun_flags |= TUNNEL_CSUM; | |
558 | break; | |
8f0aad6f WZ |
559 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: |
560 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
561 | nla_get_be16(a), is_mask); | |
562 | break; | |
563 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
564 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
565 | nla_get_be16(a), is_mask); | |
566 | break; | |
67fa0341 JG |
567 | case OVS_TUNNEL_KEY_ATTR_OAM: |
568 | tun_flags |= TUNNEL_OAM; | |
569 | break; | |
f5796684 | 570 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
1dd144cf TG |
571 | if (opts_type) { |
572 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
05da5898 JR |
576 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); |
577 | if (err) | |
578 | return err; | |
f5796684 | 579 | |
1dd144cf TG |
580 | tun_flags |= TUNNEL_GENEVE_OPT; |
581 | opts_type = type; | |
582 | break; | |
583 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
584 | if (opts_type) { | |
585 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
586 | return -EINVAL; | |
587 | } | |
588 | ||
589 | err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log); | |
590 | if (err) | |
591 | return err; | |
592 | ||
593 | tun_flags |= TUNNEL_VXLAN_OPT; | |
594 | opts_type = type; | |
f5796684 | 595 | break; |
e6445719 | 596 | default: |
05da5898 | 597 | OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d", |
f5796684 | 598 | type); |
e6445719 PS |
599 | return -EINVAL; |
600 | } | |
601 | } | |
602 | ||
603 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
604 | ||
605 | if (rem > 0) { | |
05da5898 JR |
606 | OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.", |
607 | rem); | |
e6445719 PS |
608 | return -EINVAL; |
609 | } | |
610 | ||
611 | if (!is_mask) { | |
612 | if (!match->key->tun_key.ipv4_dst) { | |
05da5898 | 613 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); |
e6445719 PS |
614 | return -EINVAL; |
615 | } | |
616 | ||
617 | if (!ttl) { | |
05da5898 | 618 | OVS_NLERR(log, "IPv4 tunnel TTL not specified."); |
e6445719 PS |
619 | return -EINVAL; |
620 | } | |
621 | } | |
622 | ||
1dd144cf TG |
623 | return opts_type; |
624 | } | |
625 | ||
626 | static int vxlan_opt_to_nlattr(struct sk_buff *skb, | |
627 | const void *tun_opts, int swkey_tun_opts_len) | |
628 | { | |
629 | const struct ovs_vxlan_opts *opts = tun_opts; | |
630 | struct nlattr *nla; | |
631 | ||
632 | nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); | |
633 | if (!nla) | |
634 | return -EMSGSIZE; | |
635 | ||
636 | if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0) | |
637 | return -EMSGSIZE; | |
638 | ||
639 | nla_nest_end(skb, nla); | |
e6445719 PS |
640 | return 0; |
641 | } | |
642 | ||
f5796684 JG |
643 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
644 | const struct ovs_key_ipv4_tunnel *output, | |
d91641d9 | 645 | const void *tun_opts, int swkey_tun_opts_len) |
e6445719 | 646 | { |
e6445719 PS |
647 | if (output->tun_flags & TUNNEL_KEY && |
648 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
649 | return -EMSGSIZE; | |
650 | if (output->ipv4_src && | |
930345ea JB |
651 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, |
652 | output->ipv4_src)) | |
e6445719 PS |
653 | return -EMSGSIZE; |
654 | if (output->ipv4_dst && | |
930345ea JB |
655 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, |
656 | output->ipv4_dst)) | |
e6445719 PS |
657 | return -EMSGSIZE; |
658 | if (output->ipv4_tos && | |
67fa0341 | 659 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
e6445719 PS |
660 | return -EMSGSIZE; |
661 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) | |
662 | return -EMSGSIZE; | |
663 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
67fa0341 | 664 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
e6445719 PS |
665 | return -EMSGSIZE; |
666 | if ((output->tun_flags & TUNNEL_CSUM) && | |
67fa0341 JG |
667 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
668 | return -EMSGSIZE; | |
8f0aad6f WZ |
669 | if (output->tp_src && |
670 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) | |
671 | return -EMSGSIZE; | |
672 | if (output->tp_dst && | |
673 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) | |
674 | return -EMSGSIZE; | |
67fa0341 JG |
675 | if ((output->tun_flags & TUNNEL_OAM) && |
676 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
e6445719 | 677 | return -EMSGSIZE; |
1dd144cf TG |
678 | if (tun_opts) { |
679 | if (output->tun_flags & TUNNEL_GENEVE_OPT && | |
680 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
681 | swkey_tun_opts_len, tun_opts)) | |
682 | return -EMSGSIZE; | |
683 | else if (output->tun_flags & TUNNEL_VXLAN_OPT && | |
684 | vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len)) | |
685 | return -EMSGSIZE; | |
686 | } | |
e6445719 | 687 | |
e6445719 PS |
688 | return 0; |
689 | } | |
690 | ||
f5796684 JG |
691 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
692 | const struct ovs_key_ipv4_tunnel *output, | |
d91641d9 | 693 | const void *tun_opts, int swkey_tun_opts_len) |
f5796684 JG |
694 | { |
695 | struct nlattr *nla; | |
696 | int err; | |
697 | ||
698 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
699 | if (!nla) | |
700 | return -EMSGSIZE; | |
701 | ||
702 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); | |
703 | if (err) | |
704 | return err; | |
705 | ||
706 | nla_nest_end(skb, nla); | |
707 | return 0; | |
708 | } | |
709 | ||
8f0aad6f WZ |
710 | int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb, |
711 | const struct ovs_tunnel_info *egress_tun_info) | |
712 | { | |
713 | return __ipv4_tun_to_nlattr(skb, &egress_tun_info->tunnel, | |
714 | egress_tun_info->options, | |
715 | egress_tun_info->options_len); | |
716 | } | |
717 | ||
e6445719 | 718 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
05da5898 JR |
719 | const struct nlattr **a, bool is_mask, |
720 | bool log) | |
e6445719 | 721 | { |
971427f3 AZ |
722 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
723 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
724 | ||
725 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
726 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
727 | } | |
728 | ||
729 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
730 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
731 | ||
732 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
733 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
734 | } | |
735 | ||
e6445719 PS |
736 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
737 | SW_FLOW_KEY_PUT(match, phy.priority, | |
738 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
739 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
740 | } | |
741 | ||
742 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
743 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
744 | ||
426cda5c | 745 | if (is_mask) { |
e6445719 | 746 | in_port = 0xffffffff; /* Always exact match in_port. */ |
426cda5c | 747 | } else if (in_port >= DP_MAX_PORTS) { |
05da5898 | 748 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
426cda5c | 749 | in_port, DP_MAX_PORTS); |
e6445719 | 750 | return -EINVAL; |
426cda5c | 751 | } |
e6445719 PS |
752 | |
753 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
754 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
755 | } else if (!is_mask) { | |
756 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
757 | } | |
758 | ||
759 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
760 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
761 | ||
762 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
763 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
764 | } | |
765 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
766 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1dd144cf | 767 | is_mask, log) < 0) |
e6445719 PS |
768 | return -EINVAL; |
769 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
770 | } | |
771 | return 0; | |
772 | } | |
773 | ||
23dabf88 | 774 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
05da5898 JR |
775 | const struct nlattr **a, bool is_mask, |
776 | bool log) | |
e6445719 PS |
777 | { |
778 | int err; | |
e6445719 | 779 | |
05da5898 | 780 | err = metadata_from_nlattrs(match, &attrs, a, is_mask, log); |
e6445719 PS |
781 | if (err) |
782 | return err; | |
783 | ||
784 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
785 | const struct ovs_key_ethernet *eth_key; | |
786 | ||
787 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
788 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
789 | eth_key->eth_src, ETH_ALEN, is_mask); | |
790 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
791 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
792 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
793 | } | |
794 | ||
795 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
796 | __be16 tci; | |
797 | ||
798 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
799 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
800 | if (is_mask) | |
05da5898 | 801 | OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit."); |
e6445719 | 802 | else |
05da5898 | 803 | OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set."); |
e6445719 PS |
804 | |
805 | return -EINVAL; | |
806 | } | |
807 | ||
808 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
809 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
a85311bf | 810 | } |
e6445719 PS |
811 | |
812 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
813 | __be16 eth_type; | |
814 | ||
815 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
816 | if (is_mask) { | |
817 | /* Always exact match EtherType. */ | |
818 | eth_type = htons(0xffff); | |
819 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
05da5898 JR |
820 | OVS_NLERR(log, "EtherType %x is less than min %x", |
821 | ntohs(eth_type), ETH_P_802_3_MIN); | |
e6445719 PS |
822 | return -EINVAL; |
823 | } | |
824 | ||
825 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
826 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
827 | } else if (!is_mask) { | |
828 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
829 | } | |
830 | ||
831 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
832 | const struct ovs_key_ipv4 *ipv4_key; | |
833 | ||
834 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
835 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
836 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
837 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
838 | return -EINVAL; |
839 | } | |
840 | SW_FLOW_KEY_PUT(match, ip.proto, | |
841 | ipv4_key->ipv4_proto, is_mask); | |
842 | SW_FLOW_KEY_PUT(match, ip.tos, | |
843 | ipv4_key->ipv4_tos, is_mask); | |
844 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
845 | ipv4_key->ipv4_ttl, is_mask); | |
846 | SW_FLOW_KEY_PUT(match, ip.frag, | |
847 | ipv4_key->ipv4_frag, is_mask); | |
848 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
849 | ipv4_key->ipv4_src, is_mask); | |
850 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
851 | ipv4_key->ipv4_dst, is_mask); | |
852 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
853 | } | |
854 | ||
855 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
856 | const struct ovs_key_ipv6 *ipv6_key; | |
857 | ||
858 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
859 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
860 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
861 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
862 | return -EINVAL; |
863 | } | |
fecaef85 | 864 | |
d3052bb5 | 865 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { |
14591433 | 866 | OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n", |
fecaef85 JR |
867 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); |
868 | return -EINVAL; | |
869 | } | |
870 | ||
e6445719 PS |
871 | SW_FLOW_KEY_PUT(match, ipv6.label, |
872 | ipv6_key->ipv6_label, is_mask); | |
873 | SW_FLOW_KEY_PUT(match, ip.proto, | |
874 | ipv6_key->ipv6_proto, is_mask); | |
875 | SW_FLOW_KEY_PUT(match, ip.tos, | |
876 | ipv6_key->ipv6_tclass, is_mask); | |
877 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
878 | ipv6_key->ipv6_hlimit, is_mask); | |
879 | SW_FLOW_KEY_PUT(match, ip.frag, | |
880 | ipv6_key->ipv6_frag, is_mask); | |
881 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
882 | ipv6_key->ipv6_src, | |
883 | sizeof(match->key->ipv6.addr.src), | |
884 | is_mask); | |
885 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
886 | ipv6_key->ipv6_dst, | |
887 | sizeof(match->key->ipv6.addr.dst), | |
888 | is_mask); | |
889 | ||
890 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
891 | } | |
892 | ||
893 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
894 | const struct ovs_key_arp *arp_key; | |
895 | ||
896 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
897 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
05da5898 | 898 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
e6445719 PS |
899 | arp_key->arp_op); |
900 | return -EINVAL; | |
901 | } | |
902 | ||
903 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
904 | arp_key->arp_sip, is_mask); | |
905 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
906 | arp_key->arp_tip, is_mask); | |
907 | SW_FLOW_KEY_PUT(match, ip.proto, | |
908 | ntohs(arp_key->arp_op), is_mask); | |
909 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
910 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
911 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
912 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
913 | ||
914 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
915 | } | |
916 | ||
25cd9ba0 SH |
917 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { |
918 | const struct ovs_key_mpls *mpls_key; | |
919 | ||
920 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
921 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
922 | mpls_key->mpls_lse, is_mask); | |
923 | ||
924 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
925 | } | |
926 | ||
e6445719 PS |
927 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
928 | const struct ovs_key_tcp *tcp_key; | |
929 | ||
930 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
931 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
932 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
933 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
934 | } | |
935 | ||
5eb26b15 | 936 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
1b760fb9 JS |
937 | SW_FLOW_KEY_PUT(match, tp.flags, |
938 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
939 | is_mask); | |
5eb26b15 JR |
940 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
941 | } | |
942 | ||
e6445719 PS |
943 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
944 | const struct ovs_key_udp *udp_key; | |
945 | ||
946 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
947 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
948 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
949 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
950 | } | |
951 | ||
952 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
953 | const struct ovs_key_sctp *sctp_key; | |
954 | ||
955 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
956 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
957 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
958 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
959 | } | |
960 | ||
961 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
962 | const struct ovs_key_icmp *icmp_key; | |
963 | ||
964 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 965 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 966 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 967 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
968 | htons(icmp_key->icmp_code), is_mask); |
969 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
970 | } | |
971 | ||
972 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
973 | const struct ovs_key_icmpv6 *icmpv6_key; | |
974 | ||
975 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 976 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 977 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 978 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
979 | htons(icmpv6_key->icmpv6_code), is_mask); |
980 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
981 | } | |
982 | ||
983 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
984 | const struct ovs_key_nd *nd_key; | |
985 | ||
986 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
987 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
988 | nd_key->nd_target, | |
989 | sizeof(match->key->ipv6.nd.target), | |
990 | is_mask); | |
991 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
992 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
993 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
994 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
995 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
996 | } | |
997 | ||
426cda5c | 998 | if (attrs != 0) { |
05da5898 | 999 | OVS_NLERR(log, "Unknown key attributes %llx", |
426cda5c | 1000 | (unsigned long long)attrs); |
e6445719 | 1001 | return -EINVAL; |
426cda5c | 1002 | } |
e6445719 PS |
1003 | |
1004 | return 0; | |
1005 | } | |
1006 | ||
81bfe3c3 TG |
1007 | static void nlattr_set(struct nlattr *attr, u8 val, |
1008 | const struct ovs_len_tbl *tbl) | |
e6445719 | 1009 | { |
f47de068 PS |
1010 | struct nlattr *nla; |
1011 | int rem; | |
e6445719 | 1012 | |
f47de068 PS |
1013 | /* The nlattr stream should already have been validated */ |
1014 | nla_for_each_nested(nla, attr, rem) { | |
81bfe3c3 TG |
1015 | if (tbl && tbl[nla_type(nla)].len == OVS_ATTR_NESTED) |
1016 | nlattr_set(nla, val, tbl[nla_type(nla)].next); | |
f47de068 PS |
1017 | else |
1018 | memset(nla_data(nla), val, nla_len(nla)); | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1023 | { | |
81bfe3c3 | 1024 | nlattr_set(attr, val, ovs_key_lens); |
e6445719 PS |
1025 | } |
1026 | ||
1027 | /** | |
1028 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1029 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1030 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1031 | * does not include any don't care bit. | |
1032 | * @match: receives the extracted flow match information. | |
1033 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1034 | * sequence. The fields should of the packet that triggered the creation | |
1035 | * of this flow. | |
1036 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1037 | * attribute specifies the mask field of the wildcarded flow. | |
05da5898 JR |
1038 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1039 | * probing for feature compatibility this should be passed in as false to | |
1040 | * suppress unnecessary error logging. | |
e6445719 PS |
1041 | */ |
1042 | int ovs_nla_get_match(struct sw_flow_match *match, | |
a85311bf | 1043 | const struct nlattr *nla_key, |
05da5898 JR |
1044 | const struct nlattr *nla_mask, |
1045 | bool log) | |
e6445719 PS |
1046 | { |
1047 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1048 | const struct nlattr *encap; | |
f47de068 | 1049 | struct nlattr *newmask = NULL; |
e6445719 PS |
1050 | u64 key_attrs = 0; |
1051 | u64 mask_attrs = 0; | |
1052 | bool encap_valid = false; | |
1053 | int err; | |
1054 | ||
05da5898 | 1055 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
e6445719 PS |
1056 | if (err) |
1057 | return err; | |
1058 | ||
1059 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
1060 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
1061 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1062 | __be16 tci; | |
1063 | ||
1064 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
1065 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
05da5898 | 1066 | OVS_NLERR(log, "Invalid Vlan frame."); |
e6445719 PS |
1067 | return -EINVAL; |
1068 | } | |
1069 | ||
1070 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1071 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1072 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1073 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1074 | encap_valid = true; | |
1075 | ||
1076 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
05da5898 | 1077 | err = parse_flow_nlattrs(encap, a, &key_attrs, log); |
e6445719 PS |
1078 | if (err) |
1079 | return err; | |
1080 | } else if (!tci) { | |
1081 | /* Corner case for truncated 802.1Q header. */ | |
1082 | if (nla_len(encap)) { | |
05da5898 | 1083 | OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute."); |
e6445719 PS |
1084 | return -EINVAL; |
1085 | } | |
1086 | } else { | |
05da5898 | 1087 | OVS_NLERR(log, "Encap attr is set for non-VLAN frame"); |
e6445719 PS |
1088 | return -EINVAL; |
1089 | } | |
1090 | } | |
1091 | ||
05da5898 | 1092 | err = ovs_key_from_nlattrs(match, key_attrs, a, false, log); |
e6445719 PS |
1093 | if (err) |
1094 | return err; | |
1095 | ||
a85311bf PS |
1096 | if (match->mask) { |
1097 | if (!nla_mask) { | |
1098 | /* Create an exact match mask. We need to set to 0xff | |
1099 | * all the 'match->mask' fields that have been touched | |
1100 | * in 'match->key'. We cannot simply memset | |
1101 | * 'match->mask', because padding bytes and fields not | |
1102 | * specified in 'match->key' should be left to 0. | |
1103 | * Instead, we use a stream of netlink attributes, | |
1104 | * copied from 'key' and set to 0xff. | |
1105 | * ovs_key_from_nlattrs() will take care of filling | |
1106 | * 'match->mask' appropriately. | |
1107 | */ | |
1108 | newmask = kmemdup(nla_key, | |
1109 | nla_total_size(nla_len(nla_key)), | |
1110 | GFP_KERNEL); | |
1111 | if (!newmask) | |
1112 | return -ENOMEM; | |
f47de068 | 1113 | |
a85311bf | 1114 | mask_set_nlattr(newmask, 0xff); |
f47de068 | 1115 | |
a85311bf PS |
1116 | /* The userspace does not send tunnel attributes that |
1117 | * are 0, but we should not wildcard them nonetheless. | |
1118 | */ | |
1119 | if (match->key->tun_key.ipv4_dst) | |
1120 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, | |
1121 | 0xff, true); | |
f47de068 | 1122 | |
a85311bf PS |
1123 | nla_mask = newmask; |
1124 | } | |
f47de068 | 1125 | |
05da5898 | 1126 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
e6445719 | 1127 | if (err) |
f47de068 | 1128 | goto free_newmask; |
e6445719 | 1129 | |
a85311bf PS |
1130 | /* Always match on tci. */ |
1131 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
1132 | ||
f47de068 | 1133 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { |
e6445719 PS |
1134 | __be16 eth_type = 0; |
1135 | __be16 tci = 0; | |
1136 | ||
1137 | if (!encap_valid) { | |
05da5898 | 1138 | OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame."); |
f47de068 PS |
1139 | err = -EINVAL; |
1140 | goto free_newmask; | |
e6445719 PS |
1141 | } |
1142 | ||
1143 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1144 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1145 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1146 | ||
1147 | if (eth_type == htons(0xffff)) { | |
1148 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1149 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
05da5898 JR |
1150 | err = parse_flow_mask_nlattrs(encap, a, |
1151 | &mask_attrs, log); | |
f47de068 PS |
1152 | if (err) |
1153 | goto free_newmask; | |
e6445719 | 1154 | } else { |
05da5898 JR |
1155 | OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).", |
1156 | ntohs(eth_type)); | |
f47de068 PS |
1157 | err = -EINVAL; |
1158 | goto free_newmask; | |
e6445719 PS |
1159 | } |
1160 | ||
1161 | if (a[OVS_KEY_ATTR_VLAN]) | |
1162 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1163 | ||
1164 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
05da5898 JR |
1165 | OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).", |
1166 | ntohs(tci)); | |
f47de068 PS |
1167 | err = -EINVAL; |
1168 | goto free_newmask; | |
e6445719 PS |
1169 | } |
1170 | } | |
1171 | ||
05da5898 | 1172 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true, log); |
e6445719 | 1173 | if (err) |
f47de068 | 1174 | goto free_newmask; |
e6445719 PS |
1175 | } |
1176 | ||
05da5898 | 1177 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
f47de068 | 1178 | err = -EINVAL; |
e6445719 | 1179 | |
f47de068 PS |
1180 | free_newmask: |
1181 | kfree(newmask); | |
1182 | return err; | |
e6445719 PS |
1183 | } |
1184 | ||
74ed7ab9 JS |
1185 | static size_t get_ufid_len(const struct nlattr *attr, bool log) |
1186 | { | |
1187 | size_t len; | |
1188 | ||
1189 | if (!attr) | |
1190 | return 0; | |
1191 | ||
1192 | len = nla_len(attr); | |
1193 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1194 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1195 | nla_len(attr), MAX_UFID_LENGTH); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | return len; | |
1200 | } | |
1201 | ||
1202 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1203 | * or false otherwise. | |
1204 | */ | |
1205 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1206 | bool log) | |
1207 | { | |
1208 | sfid->ufid_len = get_ufid_len(attr, log); | |
1209 | if (sfid->ufid_len) | |
1210 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1211 | ||
1212 | return sfid->ufid_len; | |
1213 | } | |
1214 | ||
1215 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1216 | const struct sw_flow_key *key, bool log) | |
1217 | { | |
1218 | struct sw_flow_key *new_key; | |
1219 | ||
1220 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1221 | return 0; | |
1222 | ||
1223 | /* If UFID was not provided, use unmasked key. */ | |
1224 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1225 | if (!new_key) | |
1226 | return -ENOMEM; | |
1227 | memcpy(new_key, key, sizeof(*key)); | |
1228 | sfid->unmasked_key = new_key; | |
1229 | ||
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1234 | { | |
1235 | return attr ? nla_get_u32(attr) : 0; | |
1236 | } | |
1237 | ||
e6445719 PS |
1238 | /** |
1239 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 1240 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
1241 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1242 | * sequence. | |
05da5898 JR |
1243 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1244 | * probing for feature compatibility this should be passed in as false to | |
1245 | * suppress unnecessary error logging. | |
e6445719 PS |
1246 | * |
1247 | * This parses a series of Netlink attributes that form a flow key, which must | |
1248 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1249 | * get the metadata, that is, the parts of the flow key that cannot be | |
1250 | * extracted from the packet itself. | |
1251 | */ | |
1252 | ||
83c8df26 | 1253 | int ovs_nla_get_flow_metadata(const struct nlattr *attr, |
05da5898 JR |
1254 | struct sw_flow_key *key, |
1255 | bool log) | |
e6445719 | 1256 | { |
e6445719 | 1257 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 1258 | struct sw_flow_match match; |
e6445719 PS |
1259 | u64 attrs = 0; |
1260 | int err; | |
e6445719 | 1261 | |
05da5898 | 1262 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
e6445719 PS |
1263 | if (err) |
1264 | return -EINVAL; | |
1265 | ||
1266 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 1267 | match.key = key; |
e6445719 | 1268 | |
83c8df26 | 1269 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 1270 | |
05da5898 | 1271 | return metadata_from_nlattrs(&match, &attrs, a, false, log); |
e6445719 PS |
1272 | } |
1273 | ||
5b4237bb JS |
1274 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, |
1275 | const struct sw_flow_key *output, bool is_mask, | |
1276 | struct sk_buff *skb) | |
e6445719 PS |
1277 | { |
1278 | struct ovs_key_ethernet *eth_key; | |
1279 | struct nlattr *nla, *encap; | |
e6445719 | 1280 | |
971427f3 AZ |
1281 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
1282 | goto nla_put_failure; | |
1283 | ||
1284 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1285 | goto nla_put_failure; | |
1286 | ||
e6445719 PS |
1287 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1288 | goto nla_put_failure; | |
1289 | ||
f5796684 | 1290 | if ((swkey->tun_key.ipv4_dst || is_mask)) { |
d91641d9 | 1291 | const void *opts = NULL; |
f5796684 JG |
1292 | |
1293 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
d91641d9 | 1294 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); |
f5796684 JG |
1295 | |
1296 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, | |
1297 | swkey->tun_opts_len)) | |
1298 | goto nla_put_failure; | |
1299 | } | |
e6445719 PS |
1300 | |
1301 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1302 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1303 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1304 | goto nla_put_failure; | |
1305 | } else { | |
1306 | u16 upper_u16; | |
1307 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1308 | ||
1309 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1310 | (upper_u16 << 16) | output->phy.in_port)) | |
1311 | goto nla_put_failure; | |
1312 | } | |
1313 | ||
1314 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1315 | goto nla_put_failure; | |
1316 | ||
1317 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); | |
1318 | if (!nla) | |
1319 | goto nla_put_failure; | |
1320 | ||
1321 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1322 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1323 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 PS |
1324 | |
1325 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1326 | __be16 eth_type; | |
1327 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1328 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1329 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1330 | goto nla_put_failure; | |
1331 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1332 | if (!swkey->eth.tci) | |
1333 | goto unencap; | |
1334 | } else | |
1335 | encap = NULL; | |
1336 | ||
1337 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1338 | /* | |
1339 | * Ethertype 802.2 is represented in the netlink with omitted | |
1340 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1341 | * 0xffff in the mask attribute. Ethertype can also | |
1342 | * be wildcarded. | |
1343 | */ | |
1344 | if (is_mask && output->eth.type) | |
1345 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1346 | output->eth.type)) | |
1347 | goto nla_put_failure; | |
1348 | goto unencap; | |
1349 | } | |
1350 | ||
1351 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1352 | goto nla_put_failure; | |
1353 | ||
1354 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1355 | struct ovs_key_ipv4 *ipv4_key; | |
1356 | ||
1357 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1358 | if (!nla) | |
1359 | goto nla_put_failure; | |
1360 | ipv4_key = nla_data(nla); | |
1361 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1362 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1363 | ipv4_key->ipv4_proto = output->ip.proto; | |
1364 | ipv4_key->ipv4_tos = output->ip.tos; | |
1365 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1366 | ipv4_key->ipv4_frag = output->ip.frag; | |
1367 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1368 | struct ovs_key_ipv6 *ipv6_key; | |
1369 | ||
1370 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1371 | if (!nla) | |
1372 | goto nla_put_failure; | |
1373 | ipv6_key = nla_data(nla); | |
1374 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1375 | sizeof(ipv6_key->ipv6_src)); | |
1376 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1377 | sizeof(ipv6_key->ipv6_dst)); | |
1378 | ipv6_key->ipv6_label = output->ipv6.label; | |
1379 | ipv6_key->ipv6_proto = output->ip.proto; | |
1380 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1381 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1382 | ipv6_key->ipv6_frag = output->ip.frag; | |
1383 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1384 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1385 | struct ovs_key_arp *arp_key; | |
1386 | ||
1387 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1388 | if (!nla) | |
1389 | goto nla_put_failure; | |
1390 | arp_key = nla_data(nla); | |
1391 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1392 | arp_key->arp_sip = output->ipv4.addr.src; | |
1393 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1394 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1395 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1396 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
25cd9ba0 SH |
1397 | } else if (eth_p_mpls(swkey->eth.type)) { |
1398 | struct ovs_key_mpls *mpls_key; | |
1399 | ||
1400 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1401 | if (!nla) | |
1402 | goto nla_put_failure; | |
1403 | mpls_key = nla_data(nla); | |
1404 | mpls_key->mpls_lse = output->mpls.top_lse; | |
e6445719 PS |
1405 | } |
1406 | ||
1407 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1408 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1409 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1410 | ||
1411 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1412 | struct ovs_key_tcp *tcp_key; | |
1413 | ||
1414 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1415 | if (!nla) | |
1416 | goto nla_put_failure; | |
1417 | tcp_key = nla_data(nla); | |
1139e241 JR |
1418 | tcp_key->tcp_src = output->tp.src; |
1419 | tcp_key->tcp_dst = output->tp.dst; | |
1420 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1421 | output->tp.flags)) | |
1422 | goto nla_put_failure; | |
e6445719 PS |
1423 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1424 | struct ovs_key_udp *udp_key; | |
1425 | ||
1426 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1427 | if (!nla) | |
1428 | goto nla_put_failure; | |
1429 | udp_key = nla_data(nla); | |
1139e241 JR |
1430 | udp_key->udp_src = output->tp.src; |
1431 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1432 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1433 | struct ovs_key_sctp *sctp_key; | |
1434 | ||
1435 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1436 | if (!nla) | |
1437 | goto nla_put_failure; | |
1438 | sctp_key = nla_data(nla); | |
1139e241 JR |
1439 | sctp_key->sctp_src = output->tp.src; |
1440 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1441 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1442 | swkey->ip.proto == IPPROTO_ICMP) { | |
1443 | struct ovs_key_icmp *icmp_key; | |
1444 | ||
1445 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1446 | if (!nla) | |
1447 | goto nla_put_failure; | |
1448 | icmp_key = nla_data(nla); | |
1139e241 JR |
1449 | icmp_key->icmp_type = ntohs(output->tp.src); |
1450 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1451 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1452 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1453 | struct ovs_key_icmpv6 *icmpv6_key; | |
1454 | ||
1455 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1456 | sizeof(*icmpv6_key)); | |
1457 | if (!nla) | |
1458 | goto nla_put_failure; | |
1459 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1460 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1461 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1462 | |
1463 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1464 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1465 | struct ovs_key_nd *nd_key; | |
1466 | ||
1467 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1468 | if (!nla) | |
1469 | goto nla_put_failure; | |
1470 | nd_key = nla_data(nla); | |
1471 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1472 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1473 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1474 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1475 | } |
1476 | } | |
1477 | } | |
1478 | ||
1479 | unencap: | |
1480 | if (encap) | |
1481 | nla_nest_end(skb, encap); | |
1482 | ||
1483 | return 0; | |
1484 | ||
1485 | nla_put_failure: | |
1486 | return -EMSGSIZE; | |
1487 | } | |
1488 | ||
5b4237bb JS |
1489 | int ovs_nla_put_key(const struct sw_flow_key *swkey, |
1490 | const struct sw_flow_key *output, int attr, bool is_mask, | |
1491 | struct sk_buff *skb) | |
1492 | { | |
1493 | int err; | |
1494 | struct nlattr *nla; | |
1495 | ||
1496 | nla = nla_nest_start(skb, attr); | |
1497 | if (!nla) | |
1498 | return -EMSGSIZE; | |
1499 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
1500 | if (err) | |
1501 | return err; | |
1502 | nla_nest_end(skb, nla); | |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | /* Called with ovs_mutex or RCU read lock. */ | |
74ed7ab9 JS |
1508 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) |
1509 | { | |
1510 | if (ovs_identifier_is_ufid(&flow->id)) | |
1511 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
1512 | flow->id.ufid); | |
1513 | ||
1514 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
1515 | OVS_FLOW_ATTR_KEY, false, skb); | |
1516 | } | |
1517 | ||
1518 | /* Called with ovs_mutex or RCU read lock. */ | |
1519 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
5b4237bb | 1520 | { |
26ad0b83 | 1521 | return ovs_nla_put_key(&flow->key, &flow->key, |
5b4237bb JS |
1522 | OVS_FLOW_ATTR_KEY, false, skb); |
1523 | } | |
1524 | ||
1525 | /* Called with ovs_mutex or RCU read lock. */ | |
1526 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
1527 | { | |
1528 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
1529 | OVS_FLOW_ATTR_MASK, true, skb); | |
1530 | } | |
1531 | ||
e6445719 PS |
1532 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
1533 | ||
05da5898 | 1534 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
e6445719 PS |
1535 | { |
1536 | struct sw_flow_actions *sfa; | |
1537 | ||
426cda5c | 1538 | if (size > MAX_ACTIONS_BUFSIZE) { |
05da5898 | 1539 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
e6445719 | 1540 | return ERR_PTR(-EINVAL); |
426cda5c | 1541 | } |
e6445719 PS |
1542 | |
1543 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1544 | if (!sfa) | |
1545 | return ERR_PTR(-ENOMEM); | |
1546 | ||
1547 | sfa->actions_len = 0; | |
1548 | return sfa; | |
1549 | } | |
1550 | ||
e6445719 PS |
1551 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1552 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
1553 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1554 | { | |
11d6c461 | 1555 | kfree_rcu(sf_acts, rcu); |
e6445719 PS |
1556 | } |
1557 | ||
1558 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
05da5898 | 1559 | int attr_len, bool log) |
e6445719 PS |
1560 | { |
1561 | ||
1562 | struct sw_flow_actions *acts; | |
1563 | int new_acts_size; | |
1564 | int req_size = NLA_ALIGN(attr_len); | |
1565 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1566 | (*sfa)->actions_len; | |
1567 | ||
1568 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1569 | goto out; | |
1570 | ||
1571 | new_acts_size = ksize(*sfa) * 2; | |
1572 | ||
1573 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1574 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1575 | return ERR_PTR(-EMSGSIZE); | |
1576 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1577 | } | |
1578 | ||
05da5898 | 1579 | acts = nla_alloc_flow_actions(new_acts_size, log); |
e6445719 PS |
1580 | if (IS_ERR(acts)) |
1581 | return (void *)acts; | |
1582 | ||
1583 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1584 | acts->actions_len = (*sfa)->actions_len; | |
1585 | kfree(*sfa); | |
1586 | *sfa = acts; | |
1587 | ||
1588 | out: | |
1589 | (*sfa)->actions_len += req_size; | |
1590 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1591 | } | |
1592 | ||
f0b128c1 | 1593 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
05da5898 | 1594 | int attrtype, void *data, int len, bool log) |
e6445719 PS |
1595 | { |
1596 | struct nlattr *a; | |
1597 | ||
05da5898 | 1598 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
e6445719 | 1599 | if (IS_ERR(a)) |
f0b128c1 | 1600 | return a; |
e6445719 PS |
1601 | |
1602 | a->nla_type = attrtype; | |
1603 | a->nla_len = nla_attr_size(len); | |
1604 | ||
1605 | if (data) | |
1606 | memcpy(nla_data(a), data, len); | |
1607 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1608 | ||
f0b128c1 JG |
1609 | return a; |
1610 | } | |
1611 | ||
1612 | static int add_action(struct sw_flow_actions **sfa, int attrtype, | |
05da5898 | 1613 | void *data, int len, bool log) |
f0b128c1 JG |
1614 | { |
1615 | struct nlattr *a; | |
1616 | ||
05da5898 | 1617 | a = __add_action(sfa, attrtype, data, len, log); |
f0b128c1 | 1618 | |
f35423c1 | 1619 | return PTR_ERR_OR_ZERO(a); |
e6445719 PS |
1620 | } |
1621 | ||
1622 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
05da5898 | 1623 | int attrtype, bool log) |
e6445719 PS |
1624 | { |
1625 | int used = (*sfa)->actions_len; | |
1626 | int err; | |
1627 | ||
05da5898 | 1628 | err = add_action(sfa, attrtype, NULL, 0, log); |
e6445719 PS |
1629 | if (err) |
1630 | return err; | |
1631 | ||
1632 | return used; | |
1633 | } | |
1634 | ||
1635 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1636 | int st_offset) | |
1637 | { | |
1638 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1639 | st_offset); | |
1640 | ||
1641 | a->nla_len = sfa->actions_len - st_offset; | |
1642 | } | |
1643 | ||
2fdb957d | 1644 | static int __ovs_nla_copy_actions(const struct nlattr *attr, |
25cd9ba0 SH |
1645 | const struct sw_flow_key *key, |
1646 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1647 | __be16 eth_type, __be16 vlan_tci, bool log); |
25cd9ba0 | 1648 | |
e6445719 PS |
1649 | static int validate_and_copy_sample(const struct nlattr *attr, |
1650 | const struct sw_flow_key *key, int depth, | |
25cd9ba0 | 1651 | struct sw_flow_actions **sfa, |
05da5898 | 1652 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1653 | { |
1654 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1655 | const struct nlattr *probability, *actions; | |
1656 | const struct nlattr *a; | |
1657 | int rem, start, err, st_acts; | |
1658 | ||
1659 | memset(attrs, 0, sizeof(attrs)); | |
1660 | nla_for_each_nested(a, attr, rem) { | |
1661 | int type = nla_type(a); | |
1662 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1663 | return -EINVAL; | |
1664 | attrs[type] = a; | |
1665 | } | |
1666 | if (rem) | |
1667 | return -EINVAL; | |
1668 | ||
1669 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1670 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1671 | return -EINVAL; | |
1672 | ||
1673 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1674 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1675 | return -EINVAL; | |
1676 | ||
1677 | /* validation done, copy sample action. */ | |
05da5898 | 1678 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
e6445719 PS |
1679 | if (start < 0) |
1680 | return start; | |
1681 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, | |
05da5898 | 1682 | nla_data(probability), sizeof(u32), log); |
e6445719 PS |
1683 | if (err) |
1684 | return err; | |
05da5898 | 1685 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
e6445719 PS |
1686 | if (st_acts < 0) |
1687 | return st_acts; | |
1688 | ||
2fdb957d | 1689 | err = __ovs_nla_copy_actions(actions, key, depth + 1, sfa, |
05da5898 | 1690 | eth_type, vlan_tci, log); |
e6445719 PS |
1691 | if (err) |
1692 | return err; | |
1693 | ||
1694 | add_nested_action_end(*sfa, st_acts); | |
1695 | add_nested_action_end(*sfa, start); | |
1696 | ||
1697 | return 0; | |
1698 | } | |
1699 | ||
e6445719 PS |
1700 | void ovs_match_init(struct sw_flow_match *match, |
1701 | struct sw_flow_key *key, | |
1702 | struct sw_flow_mask *mask) | |
1703 | { | |
1704 | memset(match, 0, sizeof(*match)); | |
1705 | match->key = key; | |
1706 | match->mask = mask; | |
1707 | ||
1708 | memset(key, 0, sizeof(*key)); | |
1709 | ||
1710 | if (mask) { | |
1711 | memset(&mask->key, 0, sizeof(mask->key)); | |
1712 | mask->range.start = mask->range.end = 0; | |
1713 | } | |
1714 | } | |
1715 | ||
d91641d9 TG |
1716 | static int validate_geneve_opts(struct sw_flow_key *key) |
1717 | { | |
1718 | struct geneve_opt *option; | |
1719 | int opts_len = key->tun_opts_len; | |
1720 | bool crit_opt = false; | |
1721 | ||
1722 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
1723 | while (opts_len > 0) { | |
1724 | int len; | |
1725 | ||
1726 | if (opts_len < sizeof(*option)) | |
1727 | return -EINVAL; | |
1728 | ||
1729 | len = sizeof(*option) + option->length * 4; | |
1730 | if (len > opts_len) | |
1731 | return -EINVAL; | |
1732 | ||
1733 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1734 | ||
1735 | option = (struct geneve_opt *)((u8 *)option + len); | |
1736 | opts_len -= len; | |
1737 | }; | |
1738 | ||
1739 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1740 | ||
1741 | return 0; | |
1742 | } | |
1743 | ||
e6445719 | 1744 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
05da5898 | 1745 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1746 | { |
1747 | struct sw_flow_match match; | |
1748 | struct sw_flow_key key; | |
f0b128c1 JG |
1749 | struct ovs_tunnel_info *tun_info; |
1750 | struct nlattr *a; | |
13101602 | 1751 | int err = 0, start, opts_type; |
e6445719 PS |
1752 | |
1753 | ovs_match_init(&match, &key, NULL); | |
1dd144cf TG |
1754 | opts_type = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log); |
1755 | if (opts_type < 0) | |
1756 | return opts_type; | |
e6445719 | 1757 | |
f5796684 | 1758 | if (key.tun_opts_len) { |
1dd144cf TG |
1759 | switch (opts_type) { |
1760 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
1761 | err = validate_geneve_opts(&key); | |
1762 | if (err < 0) | |
1763 | return err; | |
1764 | break; | |
1765 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
1766 | break; | |
1767 | } | |
f5796684 JG |
1768 | }; |
1769 | ||
05da5898 | 1770 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
e6445719 PS |
1771 | if (start < 0) |
1772 | return start; | |
1773 | ||
f0b128c1 | 1774 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
05da5898 | 1775 | sizeof(*tun_info) + key.tun_opts_len, log); |
f0b128c1 JG |
1776 | if (IS_ERR(a)) |
1777 | return PTR_ERR(a); | |
1778 | ||
1779 | tun_info = nla_data(a); | |
1780 | tun_info->tunnel = key.tun_key; | |
f5796684 JG |
1781 | tun_info->options_len = key.tun_opts_len; |
1782 | ||
1783 | if (tun_info->options_len) { | |
1784 | /* We need to store the options in the action itself since | |
1785 | * everything else will go away after flow setup. We can append | |
1786 | * it to tun_info and then point there. | |
1787 | */ | |
d91641d9 TG |
1788 | memcpy((tun_info + 1), |
1789 | TUN_METADATA_OPTS(&key, key.tun_opts_len), key.tun_opts_len); | |
1790 | tun_info->options = (tun_info + 1); | |
f5796684 JG |
1791 | } else { |
1792 | tun_info->options = NULL; | |
1793 | } | |
f0b128c1 | 1794 | |
e6445719 PS |
1795 | add_nested_action_end(*sfa, start); |
1796 | ||
1797 | return err; | |
1798 | } | |
1799 | ||
83d2b9ba JR |
1800 | /* Return false if there are any non-masked bits set. |
1801 | * Mask follows data immediately, before any netlink padding. | |
1802 | */ | |
1803 | static bool validate_masked(u8 *data, int len) | |
1804 | { | |
1805 | u8 *mask = data + len; | |
1806 | ||
1807 | while (len--) | |
1808 | if (*data++ & ~*mask++) | |
1809 | return false; | |
1810 | ||
1811 | return true; | |
1812 | } | |
1813 | ||
e6445719 PS |
1814 | static int validate_set(const struct nlattr *a, |
1815 | const struct sw_flow_key *flow_key, | |
1816 | struct sw_flow_actions **sfa, | |
83d2b9ba | 1817 | bool *skip_copy, __be16 eth_type, bool masked, bool log) |
e6445719 PS |
1818 | { |
1819 | const struct nlattr *ovs_key = nla_data(a); | |
1820 | int key_type = nla_type(ovs_key); | |
83d2b9ba | 1821 | size_t key_len; |
e6445719 PS |
1822 | |
1823 | /* There can be only one key in a action */ | |
1824 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
1825 | return -EINVAL; | |
1826 | ||
83d2b9ba JR |
1827 | key_len = nla_len(ovs_key); |
1828 | if (masked) | |
1829 | key_len /= 2; | |
1830 | ||
e6445719 | 1831 | if (key_type > OVS_KEY_ATTR_MAX || |
83d2b9ba | 1832 | (ovs_key_lens[key_type].len != key_len && |
81bfe3c3 | 1833 | ovs_key_lens[key_type].len != OVS_ATTR_NESTED)) |
e6445719 PS |
1834 | return -EINVAL; |
1835 | ||
83d2b9ba JR |
1836 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) |
1837 | return -EINVAL; | |
1838 | ||
e6445719 PS |
1839 | switch (key_type) { |
1840 | const struct ovs_key_ipv4 *ipv4_key; | |
1841 | const struct ovs_key_ipv6 *ipv6_key; | |
1842 | int err; | |
1843 | ||
1844 | case OVS_KEY_ATTR_PRIORITY: | |
1845 | case OVS_KEY_ATTR_SKB_MARK: | |
1846 | case OVS_KEY_ATTR_ETHERNET: | |
1847 | break; | |
1848 | ||
1849 | case OVS_KEY_ATTR_TUNNEL: | |
25cd9ba0 SH |
1850 | if (eth_p_mpls(eth_type)) |
1851 | return -EINVAL; | |
1852 | ||
83d2b9ba JR |
1853 | if (masked) |
1854 | return -EINVAL; /* Masked tunnel set not supported. */ | |
1855 | ||
1856 | *skip_copy = true; | |
05da5898 | 1857 | err = validate_and_copy_set_tun(a, sfa, log); |
e6445719 PS |
1858 | if (err) |
1859 | return err; | |
1860 | break; | |
1861 | ||
1862 | case OVS_KEY_ATTR_IPV4: | |
25cd9ba0 | 1863 | if (eth_type != htons(ETH_P_IP)) |
e6445719 PS |
1864 | return -EINVAL; |
1865 | ||
e6445719 | 1866 | ipv4_key = nla_data(ovs_key); |
e6445719 | 1867 | |
83d2b9ba JR |
1868 | if (masked) { |
1869 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
e6445719 | 1870 | |
83d2b9ba JR |
1871 | /* Non-writeable fields. */ |
1872 | if (mask->ipv4_proto || mask->ipv4_frag) | |
1873 | return -EINVAL; | |
1874 | } else { | |
1875 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
1876 | return -EINVAL; | |
1877 | ||
1878 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
1879 | return -EINVAL; | |
1880 | } | |
e6445719 PS |
1881 | break; |
1882 | ||
1883 | case OVS_KEY_ATTR_IPV6: | |
25cd9ba0 | 1884 | if (eth_type != htons(ETH_P_IPV6)) |
e6445719 PS |
1885 | return -EINVAL; |
1886 | ||
e6445719 | 1887 | ipv6_key = nla_data(ovs_key); |
e6445719 | 1888 | |
83d2b9ba JR |
1889 | if (masked) { |
1890 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
1891 | ||
1892 | /* Non-writeable fields. */ | |
1893 | if (mask->ipv6_proto || mask->ipv6_frag) | |
1894 | return -EINVAL; | |
1895 | ||
1896 | /* Invalid bits in the flow label mask? */ | |
1897 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
1898 | return -EINVAL; | |
1899 | } else { | |
1900 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
1901 | return -EINVAL; | |
e6445719 | 1902 | |
83d2b9ba JR |
1903 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) |
1904 | return -EINVAL; | |
1905 | } | |
e6445719 PS |
1906 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
1907 | return -EINVAL; | |
1908 | ||
1909 | break; | |
1910 | ||
1911 | case OVS_KEY_ATTR_TCP: | |
83d2b9ba JR |
1912 | if ((eth_type != htons(ETH_P_IP) && |
1913 | eth_type != htons(ETH_P_IPV6)) || | |
1914 | flow_key->ip.proto != IPPROTO_TCP) | |
e6445719 PS |
1915 | return -EINVAL; |
1916 | ||
83d2b9ba | 1917 | break; |
e6445719 PS |
1918 | |
1919 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
1920 | if ((eth_type != htons(ETH_P_IP) && |
1921 | eth_type != htons(ETH_P_IPV6)) || | |
1922 | flow_key->ip.proto != IPPROTO_UDP) | |
e6445719 PS |
1923 | return -EINVAL; |
1924 | ||
83d2b9ba | 1925 | break; |
25cd9ba0 SH |
1926 | |
1927 | case OVS_KEY_ATTR_MPLS: | |
1928 | if (!eth_p_mpls(eth_type)) | |
1929 | return -EINVAL; | |
1930 | break; | |
e6445719 PS |
1931 | |
1932 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
1933 | if ((eth_type != htons(ETH_P_IP) && |
1934 | eth_type != htons(ETH_P_IPV6)) || | |
1935 | flow_key->ip.proto != IPPROTO_SCTP) | |
e6445719 PS |
1936 | return -EINVAL; |
1937 | ||
83d2b9ba | 1938 | break; |
e6445719 PS |
1939 | |
1940 | default: | |
1941 | return -EINVAL; | |
1942 | } | |
1943 | ||
83d2b9ba JR |
1944 | /* Convert non-masked non-tunnel set actions to masked set actions. */ |
1945 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
1946 | int start, len = key_len * 2; | |
1947 | struct nlattr *at; | |
1948 | ||
1949 | *skip_copy = true; | |
1950 | ||
1951 | start = add_nested_action_start(sfa, | |
1952 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
1953 | log); | |
1954 | if (start < 0) | |
1955 | return start; | |
1956 | ||
1957 | at = __add_action(sfa, key_type, NULL, len, log); | |
1958 | if (IS_ERR(at)) | |
1959 | return PTR_ERR(at); | |
1960 | ||
1961 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
1962 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
1963 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
1964 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
1965 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
1966 | ||
1967 | mask->ipv6_label &= htonl(0x000FFFFF); | |
1968 | } | |
1969 | add_nested_action_end(*sfa, start); | |
1970 | } | |
1971 | ||
e6445719 PS |
1972 | return 0; |
1973 | } | |
1974 | ||
1975 | static int validate_userspace(const struct nlattr *attr) | |
1976 | { | |
1977 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
1978 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
1979 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8f0aad6f | 1980 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
e6445719 PS |
1981 | }; |
1982 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
1983 | int error; | |
1984 | ||
1985 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
1986 | attr, userspace_policy); | |
1987 | if (error) | |
1988 | return error; | |
1989 | ||
1990 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
1991 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
1992 | return -EINVAL; | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | static int copy_action(const struct nlattr *from, | |
05da5898 | 1998 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1999 | { |
2000 | int totlen = NLA_ALIGN(from->nla_len); | |
2001 | struct nlattr *to; | |
2002 | ||
05da5898 | 2003 | to = reserve_sfa_size(sfa, from->nla_len, log); |
e6445719 PS |
2004 | if (IS_ERR(to)) |
2005 | return PTR_ERR(to); | |
2006 | ||
2007 | memcpy(to, from, totlen); | |
2008 | return 0; | |
2009 | } | |
2010 | ||
2fdb957d | 2011 | static int __ovs_nla_copy_actions(const struct nlattr *attr, |
25cd9ba0 SH |
2012 | const struct sw_flow_key *key, |
2013 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 2014 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
2015 | { |
2016 | const struct nlattr *a; | |
2017 | int rem, err; | |
2018 | ||
2019 | if (depth >= SAMPLE_ACTION_DEPTH) | |
2020 | return -EOVERFLOW; | |
2021 | ||
2022 | nla_for_each_nested(a, attr, rem) { | |
2023 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2024 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2025 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 2026 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 | 2027 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
25cd9ba0 SH |
2028 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
2029 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
e6445719 PS |
2030 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
2031 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2032 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
83d2b9ba | 2033 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, |
971427f3 AZ |
2034 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
2035 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash) | |
e6445719 PS |
2036 | }; |
2037 | const struct ovs_action_push_vlan *vlan; | |
2038 | int type = nla_type(a); | |
2039 | bool skip_copy; | |
2040 | ||
2041 | if (type > OVS_ACTION_ATTR_MAX || | |
2042 | (action_lens[type] != nla_len(a) && | |
2043 | action_lens[type] != (u32)-1)) | |
2044 | return -EINVAL; | |
2045 | ||
2046 | skip_copy = false; | |
2047 | switch (type) { | |
2048 | case OVS_ACTION_ATTR_UNSPEC: | |
2049 | return -EINVAL; | |
2050 | ||
2051 | case OVS_ACTION_ATTR_USERSPACE: | |
2052 | err = validate_userspace(a); | |
2053 | if (err) | |
2054 | return err; | |
2055 | break; | |
2056 | ||
2057 | case OVS_ACTION_ATTR_OUTPUT: | |
2058 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2059 | return -EINVAL; | |
2060 | break; | |
2061 | ||
971427f3 AZ |
2062 | case OVS_ACTION_ATTR_HASH: { |
2063 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2064 | ||
2065 | switch (act_hash->hash_alg) { | |
2066 | case OVS_HASH_ALG_L4: | |
2067 | break; | |
2068 | default: | |
2069 | return -EINVAL; | |
2070 | } | |
2071 | ||
2072 | break; | |
2073 | } | |
e6445719 PS |
2074 | |
2075 | case OVS_ACTION_ATTR_POP_VLAN: | |
25cd9ba0 | 2076 | vlan_tci = htons(0); |
e6445719 PS |
2077 | break; |
2078 | ||
2079 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2080 | vlan = nla_data(a); | |
2081 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
2082 | return -EINVAL; | |
2083 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2084 | return -EINVAL; | |
25cd9ba0 | 2085 | vlan_tci = vlan->vlan_tci; |
e6445719 PS |
2086 | break; |
2087 | ||
971427f3 AZ |
2088 | case OVS_ACTION_ATTR_RECIRC: |
2089 | break; | |
2090 | ||
25cd9ba0 SH |
2091 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
2092 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2093 | ||
25cd9ba0 SH |
2094 | if (!eth_p_mpls(mpls->mpls_ethertype)) |
2095 | return -EINVAL; | |
2096 | /* Prohibit push MPLS other than to a white list | |
2097 | * for packets that have a known tag order. | |
2098 | */ | |
2099 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2100 | (eth_type != htons(ETH_P_IP) && | |
2101 | eth_type != htons(ETH_P_IPV6) && | |
2102 | eth_type != htons(ETH_P_ARP) && | |
2103 | eth_type != htons(ETH_P_RARP) && | |
2104 | !eth_p_mpls(eth_type))) | |
2105 | return -EINVAL; | |
2106 | eth_type = mpls->mpls_ethertype; | |
2107 | break; | |
2108 | } | |
2109 | ||
2110 | case OVS_ACTION_ATTR_POP_MPLS: | |
2111 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2112 | !eth_p_mpls(eth_type)) | |
2113 | return -EINVAL; | |
2114 | ||
2115 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2116 | * as there is no check here to ensure that the new | |
2117 | * eth_type is valid and thus set actions could | |
2118 | * write off the end of the packet or otherwise | |
2119 | * corrupt it. | |
2120 | * | |
2121 | * Support for these actions is planned using packet | |
2122 | * recirculation. | |
2123 | */ | |
2124 | eth_type = htons(0); | |
2125 | break; | |
2126 | ||
e6445719 | 2127 | case OVS_ACTION_ATTR_SET: |
25cd9ba0 | 2128 | err = validate_set(a, key, sfa, |
83d2b9ba JR |
2129 | &skip_copy, eth_type, false, log); |
2130 | if (err) | |
2131 | return err; | |
2132 | break; | |
2133 | ||
2134 | case OVS_ACTION_ATTR_SET_MASKED: | |
2135 | err = validate_set(a, key, sfa, | |
2136 | &skip_copy, eth_type, true, log); | |
e6445719 PS |
2137 | if (err) |
2138 | return err; | |
2139 | break; | |
2140 | ||
2141 | case OVS_ACTION_ATTR_SAMPLE: | |
25cd9ba0 | 2142 | err = validate_and_copy_sample(a, key, depth, sfa, |
05da5898 | 2143 | eth_type, vlan_tci, log); |
e6445719 PS |
2144 | if (err) |
2145 | return err; | |
2146 | skip_copy = true; | |
2147 | break; | |
2148 | ||
2149 | default: | |
05da5898 | 2150 | OVS_NLERR(log, "Unknown Action type %d", type); |
e6445719 PS |
2151 | return -EINVAL; |
2152 | } | |
2153 | if (!skip_copy) { | |
05da5898 | 2154 | err = copy_action(a, sfa, log); |
e6445719 PS |
2155 | if (err) |
2156 | return err; | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | if (rem > 0) | |
2161 | return -EINVAL; | |
2162 | ||
2163 | return 0; | |
2164 | } | |
2165 | ||
83d2b9ba | 2166 | /* 'key' must be the masked key. */ |
25cd9ba0 SH |
2167 | int ovs_nla_copy_actions(const struct nlattr *attr, |
2168 | const struct sw_flow_key *key, | |
05da5898 | 2169 | struct sw_flow_actions **sfa, bool log) |
25cd9ba0 | 2170 | { |
2fdb957d PS |
2171 | int err; |
2172 | ||
05da5898 | 2173 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
2fdb957d PS |
2174 | if (IS_ERR(*sfa)) |
2175 | return PTR_ERR(*sfa); | |
2176 | ||
2177 | err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, | |
05da5898 | 2178 | key->eth.tci, log); |
2fdb957d PS |
2179 | if (err) |
2180 | kfree(*sfa); | |
2181 | ||
2182 | return err; | |
25cd9ba0 SH |
2183 | } |
2184 | ||
e6445719 PS |
2185 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
2186 | { | |
2187 | const struct nlattr *a; | |
2188 | struct nlattr *start; | |
2189 | int err = 0, rem; | |
2190 | ||
2191 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
2192 | if (!start) | |
2193 | return -EMSGSIZE; | |
2194 | ||
2195 | nla_for_each_nested(a, attr, rem) { | |
2196 | int type = nla_type(a); | |
2197 | struct nlattr *st_sample; | |
2198 | ||
2199 | switch (type) { | |
2200 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
2201 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
2202 | sizeof(u32), nla_data(a))) | |
2203 | return -EMSGSIZE; | |
2204 | break; | |
2205 | case OVS_SAMPLE_ATTR_ACTIONS: | |
2206 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
2207 | if (!st_sample) | |
2208 | return -EMSGSIZE; | |
2209 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
2210 | if (err) | |
2211 | return err; | |
2212 | nla_nest_end(skb, st_sample); | |
2213 | break; | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | nla_nest_end(skb, start); | |
2218 | return err; | |
2219 | } | |
2220 | ||
2221 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
2222 | { | |
2223 | const struct nlattr *ovs_key = nla_data(a); | |
2224 | int key_type = nla_type(ovs_key); | |
2225 | struct nlattr *start; | |
2226 | int err; | |
2227 | ||
2228 | switch (key_type) { | |
f0b128c1 JG |
2229 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
2230 | struct ovs_tunnel_info *tun_info = nla_data(ovs_key); | |
2231 | ||
e6445719 PS |
2232 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2233 | if (!start) | |
2234 | return -EMSGSIZE; | |
2235 | ||
f0b128c1 | 2236 | err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel, |
f5796684 JG |
2237 | tun_info->options_len ? |
2238 | tun_info->options : NULL, | |
2239 | tun_info->options_len); | |
e6445719 PS |
2240 | if (err) |
2241 | return err; | |
2242 | nla_nest_end(skb, start); | |
2243 | break; | |
f0b128c1 | 2244 | } |
e6445719 PS |
2245 | default: |
2246 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
2247 | return -EMSGSIZE; | |
2248 | break; | |
2249 | } | |
2250 | ||
2251 | return 0; | |
2252 | } | |
2253 | ||
83d2b9ba JR |
2254 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, |
2255 | struct sk_buff *skb) | |
2256 | { | |
2257 | const struct nlattr *ovs_key = nla_data(a); | |
f4f8e738 | 2258 | struct nlattr *nla; |
83d2b9ba JR |
2259 | size_t key_len = nla_len(ovs_key) / 2; |
2260 | ||
2261 | /* Revert the conversion we did from a non-masked set action to | |
2262 | * masked set action. | |
2263 | */ | |
f4f8e738 JS |
2264 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2265 | if (!nla) | |
83d2b9ba JR |
2266 | return -EMSGSIZE; |
2267 | ||
f4f8e738 JS |
2268 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) |
2269 | return -EMSGSIZE; | |
2270 | ||
2271 | nla_nest_end(skb, nla); | |
83d2b9ba JR |
2272 | return 0; |
2273 | } | |
2274 | ||
e6445719 PS |
2275 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
2276 | { | |
2277 | const struct nlattr *a; | |
2278 | int rem, err; | |
2279 | ||
2280 | nla_for_each_attr(a, attr, len, rem) { | |
2281 | int type = nla_type(a); | |
2282 | ||
2283 | switch (type) { | |
2284 | case OVS_ACTION_ATTR_SET: | |
2285 | err = set_action_to_attr(a, skb); | |
2286 | if (err) | |
2287 | return err; | |
2288 | break; | |
2289 | ||
83d2b9ba JR |
2290 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
2291 | err = masked_set_action_to_set_action_attr(a, skb); | |
2292 | if (err) | |
2293 | return err; | |
2294 | break; | |
2295 | ||
e6445719 PS |
2296 | case OVS_ACTION_ATTR_SAMPLE: |
2297 | err = sample_action_to_attr(a, skb); | |
2298 | if (err) | |
2299 | return err; | |
2300 | break; | |
2301 | default: | |
2302 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2303 | return -EMSGSIZE; | |
2304 | break; | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | return 0; | |
2309 | } |