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e6445719 | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
e6445719 PS |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
2235ad1c JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
e6445719 PS |
21 | #include "flow.h" |
22 | #include "datapath.h" | |
23 | #include <linux/uaccess.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
28 | #include <net/llc_pdu.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/jhash.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/llc.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/in.h> | |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/ip.h> | |
38 | #include <linux/ipv6.h> | |
39 | #include <linux/sctp.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/udp.h> | |
42 | #include <linux/icmp.h> | |
43 | #include <linux/icmpv6.h> | |
44 | #include <linux/rculist.h> | |
f5796684 | 45 | #include <net/geneve.h> |
e6445719 PS |
46 | #include <net/ip.h> |
47 | #include <net/ipv6.h> | |
48 | #include <net/ndisc.h> | |
25cd9ba0 | 49 | #include <net/mpls.h> |
614732ea | 50 | #include <net/vxlan.h> |
e6445719 PS |
51 | |
52 | #include "flow_netlink.h" | |
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 | |
982b5270 | 60 | #define OVS_ATTR_VARIABLE -2 |
81bfe3c3 | 61 | |
a85311bf PS |
62 | static void update_range(struct sw_flow_match *match, |
63 | size_t offset, size_t size, bool is_mask) | |
e6445719 | 64 | { |
a85311bf | 65 | struct sw_flow_key_range *range; |
e6445719 PS |
66 | size_t start = rounddown(offset, sizeof(long)); |
67 | size_t end = roundup(offset + size, sizeof(long)); | |
68 | ||
69 | if (!is_mask) | |
70 | range = &match->range; | |
a85311bf | 71 | else |
e6445719 PS |
72 | range = &match->mask->range; |
73 | ||
e6445719 PS |
74 | if (range->start == range->end) { |
75 | range->start = start; | |
76 | range->end = end; | |
77 | return; | |
78 | } | |
79 | ||
80 | if (range->start > start) | |
81 | range->start = start; | |
82 | ||
83 | if (range->end < end) | |
84 | range->end = end; | |
85 | } | |
86 | ||
87 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
88 | do { \ | |
a85311bf PS |
89 | update_range(match, offsetof(struct sw_flow_key, field), \ |
90 | sizeof((match)->key->field), is_mask); \ | |
91 | if (is_mask) \ | |
92 | (match)->mask->key.field = value; \ | |
93 | else \ | |
e6445719 | 94 | (match)->key->field = value; \ |
e6445719 PS |
95 | } while (0) |
96 | ||
f5796684 JG |
97 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
98 | do { \ | |
a85311bf | 99 | update_range(match, offset, len, is_mask); \ |
f5796684 JG |
100 | if (is_mask) \ |
101 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
a85311bf | 102 | len); \ |
f5796684 JG |
103 | else \ |
104 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
e6445719 PS |
105 | } while (0) |
106 | ||
f5796684 JG |
107 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
108 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
109 | value_p, len, is_mask) | |
110 | ||
a85311bf PS |
111 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ |
112 | do { \ | |
113 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
114 | sizeof((match)->key->field), is_mask); \ | |
115 | if (is_mask) \ | |
116 | memset((u8 *)&(match)->mask->key.field, value, \ | |
117 | sizeof((match)->mask->key.field)); \ | |
118 | else \ | |
f47de068 PS |
119 | memset((u8 *)&(match)->key->field, value, \ |
120 | sizeof((match)->key->field)); \ | |
f47de068 | 121 | } while (0) |
e6445719 PS |
122 | |
123 | static bool match_validate(const struct sw_flow_match *match, | |
05da5898 | 124 | u64 key_attrs, u64 mask_attrs, bool log) |
e6445719 PS |
125 | { |
126 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
127 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
128 | ||
129 | /* The following mask attributes allowed only if they | |
130 | * pass the validation tests. */ | |
131 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
132 | | (1 << OVS_KEY_ATTR_IPV6) | |
133 | | (1 << OVS_KEY_ATTR_TCP) | |
5eb26b15 | 134 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
e6445719 PS |
135 | | (1 << OVS_KEY_ATTR_UDP) |
136 | | (1 << OVS_KEY_ATTR_SCTP) | |
137 | | (1 << OVS_KEY_ATTR_ICMP) | |
138 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
139 | | (1 << OVS_KEY_ATTR_ARP) | |
25cd9ba0 SH |
140 | | (1 << OVS_KEY_ATTR_ND) |
141 | | (1 << OVS_KEY_ATTR_MPLS)); | |
e6445719 PS |
142 | |
143 | /* Always allowed mask fields. */ | |
144 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
145 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
146 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
147 | ||
148 | /* Check key attributes. */ | |
149 | if (match->key->eth.type == htons(ETH_P_ARP) | |
150 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
151 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
f2a01517 | 152 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
e6445719 PS |
153 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; |
154 | } | |
155 | ||
25cd9ba0 SH |
156 | if (eth_p_mpls(match->key->eth.type)) { |
157 | key_expected |= 1 << OVS_KEY_ATTR_MPLS; | |
158 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
159 | mask_allowed |= 1 << OVS_KEY_ATTR_MPLS; | |
160 | } | |
161 | ||
e6445719 PS |
162 | if (match->key->eth.type == htons(ETH_P_IP)) { |
163 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
164 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
165 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
166 | ||
167 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
168 | if (match->key->ip.proto == IPPROTO_UDP) { | |
169 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
170 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
171 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
172 | } | |
173 | ||
174 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
175 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
176 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
177 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
178 | } | |
179 | ||
180 | if (match->key->ip.proto == IPPROTO_TCP) { | |
181 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
182 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
183 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 184 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
185 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
186 | } | |
e6445719 PS |
187 | } |
188 | ||
189 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
190 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
191 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
192 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
193 | } | |
194 | } | |
195 | } | |
196 | ||
197 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
198 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
199 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
200 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
201 | ||
202 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
203 | if (match->key->ip.proto == IPPROTO_UDP) { | |
204 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
205 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
206 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
207 | } | |
208 | ||
209 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
210 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
211 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
212 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
213 | } | |
214 | ||
215 | if (match->key->ip.proto == IPPROTO_TCP) { | |
216 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
217 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
218 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 219 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
220 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
221 | } | |
e6445719 PS |
222 | } |
223 | ||
224 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
225 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
226 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
227 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
228 | ||
1139e241 | 229 | if (match->key->tp.src == |
e6445719 | 230 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
1139e241 | 231 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
e6445719 | 232 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
f2a01517 | 233 | if (match->mask && (match->mask->key.tp.src == htons(0xff))) |
e6445719 PS |
234 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
235 | } | |
236 | } | |
237 | } | |
238 | } | |
239 | ||
240 | if ((key_attrs & key_expected) != key_expected) { | |
241 | /* Key attributes check failed. */ | |
05da5898 JR |
242 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", |
243 | (unsigned long long)key_attrs, | |
244 | (unsigned long long)key_expected); | |
e6445719 PS |
245 | return false; |
246 | } | |
247 | ||
248 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
249 | /* Mask attributes check failed. */ | |
05da5898 JR |
250 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", |
251 | (unsigned long long)mask_attrs, | |
252 | (unsigned long long)mask_allowed); | |
e6445719 PS |
253 | return false; |
254 | } | |
255 | ||
256 | return true; | |
257 | } | |
258 | ||
8f0aad6f WZ |
259 | size_t ovs_tun_key_attr_size(void) |
260 | { | |
261 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
262 | * updating this function. | |
263 | */ | |
b46f6ded | 264 | return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */ |
6b26ba3a JB |
265 | + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */ |
266 | + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */ | |
8f0aad6f WZ |
267 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ |
268 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
269 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
270 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
271 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
272 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
1dd144cf TG |
273 | /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with |
274 | * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it. | |
275 | */ | |
8f0aad6f WZ |
276 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ |
277 | + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
278 | } | |
279 | ||
41af73e9 JS |
280 | size_t ovs_key_attr_size(void) |
281 | { | |
282 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
283 | * updating this function. | |
284 | */ | |
c2ac6673 | 285 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26); |
41af73e9 JS |
286 | |
287 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
288 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
8f0aad6f | 289 | + ovs_tun_key_attr_size() |
41af73e9 JS |
290 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
291 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
292 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
293 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
fbccce59 | 294 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */ |
7f8a436e | 295 | + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */ |
182e3042 | 296 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */ |
33db4125 | 297 | + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */ |
41af73e9 JS |
298 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ |
299 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
300 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
301 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
302 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
303 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
304 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
305 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
306 | } | |
307 | ||
982b5270 JG |
308 | static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = { |
309 | [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) }, | |
310 | }; | |
311 | ||
81bfe3c3 TG |
312 | static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
313 | [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) }, | |
314 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) }, | |
315 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) }, | |
316 | [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 }, | |
317 | [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 }, | |
318 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 }, | |
319 | [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 }, | |
320 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) }, | |
321 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) }, | |
322 | [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 }, | |
982b5270 JG |
323 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE }, |
324 | [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED, | |
325 | .next = ovs_vxlan_ext_key_lens }, | |
6b26ba3a JB |
326 | [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, |
327 | [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) }, | |
81bfe3c3 TG |
328 | }; |
329 | ||
e6445719 | 330 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
81bfe3c3 TG |
331 | static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
332 | [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED }, | |
333 | [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) }, | |
334 | [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) }, | |
335 | [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) }, | |
336 | [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) }, | |
337 | [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) }, | |
338 | [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) }, | |
339 | [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) }, | |
340 | [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) }, | |
341 | [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) }, | |
342 | [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) }, | |
343 | [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) }, | |
344 | [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) }, | |
345 | [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) }, | |
346 | [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) }, | |
347 | [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) }, | |
348 | [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) }, | |
349 | [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) }, | |
350 | [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) }, | |
351 | [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, | |
352 | .next = ovs_tunnel_key_lens, }, | |
353 | [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, | |
fbccce59 | 354 | [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) }, |
7f8a436e | 355 | [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) }, |
182e3042 | 356 | [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) }, |
33db4125 | 357 | [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) }, |
e6445719 PS |
358 | }; |
359 | ||
982b5270 JG |
360 | static bool check_attr_len(unsigned int attr_len, unsigned int expected_len) |
361 | { | |
362 | return expected_len == attr_len || | |
363 | expected_len == OVS_ATTR_NESTED || | |
364 | expected_len == OVS_ATTR_VARIABLE; | |
365 | } | |
366 | ||
e6445719 PS |
367 | static bool is_all_zero(const u8 *fp, size_t size) |
368 | { | |
369 | int i; | |
370 | ||
371 | if (!fp) | |
372 | return false; | |
373 | ||
374 | for (i = 0; i < size; i++) | |
375 | if (fp[i]) | |
376 | return false; | |
377 | ||
378 | return true; | |
379 | } | |
380 | ||
381 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
382 | const struct nlattr *a[], | |
05da5898 | 383 | u64 *attrsp, bool log, bool nz) |
e6445719 PS |
384 | { |
385 | const struct nlattr *nla; | |
386 | u64 attrs; | |
387 | int rem; | |
388 | ||
389 | attrs = *attrsp; | |
390 | nla_for_each_nested(nla, attr, rem) { | |
391 | u16 type = nla_type(nla); | |
392 | int expected_len; | |
393 | ||
394 | if (type > OVS_KEY_ATTR_MAX) { | |
05da5898 | 395 | OVS_NLERR(log, "Key type %d is out of range max %d", |
e6445719 PS |
396 | type, OVS_KEY_ATTR_MAX); |
397 | return -EINVAL; | |
398 | } | |
399 | ||
400 | if (attrs & (1 << type)) { | |
05da5898 | 401 | OVS_NLERR(log, "Duplicate key (type %d).", type); |
e6445719 PS |
402 | return -EINVAL; |
403 | } | |
404 | ||
81bfe3c3 | 405 | expected_len = ovs_key_lens[type].len; |
982b5270 | 406 | if (!check_attr_len(nla_len(nla), expected_len)) { |
05da5898 JR |
407 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", |
408 | type, nla_len(nla), expected_len); | |
e6445719 PS |
409 | return -EINVAL; |
410 | } | |
411 | ||
412 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
413 | attrs |= 1 << type; | |
414 | a[type] = nla; | |
415 | } | |
416 | } | |
417 | if (rem) { | |
05da5898 | 418 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); |
e6445719 PS |
419 | return -EINVAL; |
420 | } | |
421 | ||
422 | *attrsp = attrs; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
427 | const struct nlattr *a[], u64 *attrsp, |
428 | bool log) | |
e6445719 | 429 | { |
05da5898 | 430 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); |
e6445719 PS |
431 | } |
432 | ||
433 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
434 | const struct nlattr *a[], u64 *attrsp, |
435 | bool log) | |
e6445719 | 436 | { |
05da5898 JR |
437 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); |
438 | } | |
439 | ||
440 | static int genev_tun_opt_from_nlattr(const struct nlattr *a, | |
441 | struct sw_flow_match *match, bool is_mask, | |
442 | bool log) | |
443 | { | |
444 | unsigned long opt_key_offset; | |
445 | ||
446 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
447 | OVS_NLERR(log, "Geneve option length err (len %d, max %zu).", | |
448 | nla_len(a), sizeof(match->key->tun_opts)); | |
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | if (nla_len(a) % 4 != 0) { | |
453 | OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.", | |
454 | nla_len(a)); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | /* We need to record the length of the options passed | |
459 | * down, otherwise packets with the same format but | |
460 | * additional options will be silently matched. | |
461 | */ | |
462 | if (!is_mask) { | |
463 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
464 | false); | |
465 | } else { | |
466 | /* This is somewhat unusual because it looks at | |
467 | * both the key and mask while parsing the | |
468 | * attributes (and by extension assumes the key | |
469 | * is parsed first). Normally, we would verify | |
470 | * that each is the correct length and that the | |
471 | * attributes line up in the validate function. | |
472 | * However, that is difficult because this is | |
473 | * variable length and we won't have the | |
474 | * information later. | |
475 | */ | |
476 | if (match->key->tun_opts_len != nla_len(a)) { | |
477 | OVS_NLERR(log, "Geneve option len %d != mask len %d", | |
478 | match->key->tun_opts_len, nla_len(a)); | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
482 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
483 | } | |
484 | ||
d91641d9 | 485 | opt_key_offset = TUN_METADATA_OFFSET(nla_len(a)); |
05da5898 JR |
486 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), |
487 | nla_len(a), is_mask); | |
488 | return 0; | |
e6445719 PS |
489 | } |
490 | ||
982b5270 | 491 | static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr, |
1dd144cf TG |
492 | struct sw_flow_match *match, bool is_mask, |
493 | bool log) | |
494 | { | |
982b5270 JG |
495 | struct nlattr *a; |
496 | int rem; | |
1dd144cf | 497 | unsigned long opt_key_offset; |
614732ea | 498 | struct vxlan_metadata opts; |
1dd144cf TG |
499 | |
500 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
501 | ||
1dd144cf | 502 | memset(&opts, 0, sizeof(opts)); |
982b5270 JG |
503 | nla_for_each_nested(a, attr, rem) { |
504 | int type = nla_type(a); | |
1dd144cf | 505 | |
982b5270 JG |
506 | if (type > OVS_VXLAN_EXT_MAX) { |
507 | OVS_NLERR(log, "VXLAN extension %d out of range max %d", | |
508 | type, OVS_VXLAN_EXT_MAX); | |
509 | return -EINVAL; | |
510 | } | |
511 | ||
512 | if (!check_attr_len(nla_len(a), | |
513 | ovs_vxlan_ext_key_lens[type].len)) { | |
514 | OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d", | |
515 | type, nla_len(a), | |
516 | ovs_vxlan_ext_key_lens[type].len); | |
517 | return -EINVAL; | |
518 | } | |
519 | ||
520 | switch (type) { | |
521 | case OVS_VXLAN_EXT_GBP: | |
522 | opts.gbp = nla_get_u32(a); | |
523 | break; | |
524 | default: | |
525 | OVS_NLERR(log, "Unknown VXLAN extension attribute %d", | |
526 | type); | |
527 | return -EINVAL; | |
528 | } | |
529 | } | |
530 | if (rem) { | |
531 | OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.", | |
532 | rem); | |
533 | return -EINVAL; | |
534 | } | |
1dd144cf TG |
535 | |
536 | if (!is_mask) | |
537 | SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false); | |
538 | else | |
539 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
540 | ||
541 | opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts)); | |
542 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts), | |
543 | is_mask); | |
544 | return 0; | |
545 | } | |
546 | ||
6b26ba3a JB |
547 | static int ip_tun_from_nlattr(const struct nlattr *attr, |
548 | struct sw_flow_match *match, bool is_mask, | |
549 | bool log) | |
e6445719 | 550 | { |
99e28f18 PS |
551 | bool ttl = false, ipv4 = false, ipv6 = false; |
552 | __be16 tun_flags = 0; | |
553 | int opts_type = 0; | |
e6445719 PS |
554 | struct nlattr *a; |
555 | int rem; | |
e6445719 PS |
556 | |
557 | nla_for_each_nested(a, attr, rem) { | |
558 | int type = nla_type(a); | |
05da5898 JR |
559 | int err; |
560 | ||
e6445719 | 561 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
05da5898 JR |
562 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", |
563 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
e6445719 PS |
564 | return -EINVAL; |
565 | } | |
566 | ||
982b5270 JG |
567 | if (!check_attr_len(nla_len(a), |
568 | ovs_tunnel_key_lens[type].len)) { | |
05da5898 | 569 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", |
81bfe3c3 | 570 | type, nla_len(a), ovs_tunnel_key_lens[type].len); |
e6445719 PS |
571 | return -EINVAL; |
572 | } | |
573 | ||
574 | switch (type) { | |
575 | case OVS_TUNNEL_KEY_ATTR_ID: | |
576 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
577 | nla_get_be64(a), is_mask); | |
578 | tun_flags |= TUNNEL_KEY; | |
579 | break; | |
580 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
c1ea5d67 | 581 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src, |
67b61f6c | 582 | nla_get_in_addr(a), is_mask); |
6b26ba3a | 583 | ipv4 = true; |
e6445719 PS |
584 | break; |
585 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
c1ea5d67 | 586 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst, |
67b61f6c | 587 | nla_get_in_addr(a), is_mask); |
6b26ba3a JB |
588 | ipv4 = true; |
589 | break; | |
590 | case OVS_TUNNEL_KEY_ATTR_IPV6_SRC: | |
591 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst, | |
592 | nla_get_in6_addr(a), is_mask); | |
593 | ipv6 = true; | |
594 | break; | |
595 | case OVS_TUNNEL_KEY_ATTR_IPV6_DST: | |
596 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst, | |
597 | nla_get_in6_addr(a), is_mask); | |
598 | ipv6 = true; | |
e6445719 PS |
599 | break; |
600 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
7c383fb2 | 601 | SW_FLOW_KEY_PUT(match, tun_key.tos, |
e6445719 PS |
602 | nla_get_u8(a), is_mask); |
603 | break; | |
604 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
7c383fb2 | 605 | SW_FLOW_KEY_PUT(match, tun_key.ttl, |
e6445719 PS |
606 | nla_get_u8(a), is_mask); |
607 | ttl = true; | |
608 | break; | |
609 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
610 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
611 | break; | |
612 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
613 | tun_flags |= TUNNEL_CSUM; | |
614 | break; | |
8f0aad6f WZ |
615 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: |
616 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
617 | nla_get_be16(a), is_mask); | |
618 | break; | |
619 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
620 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
621 | nla_get_be16(a), is_mask); | |
622 | break; | |
67fa0341 JG |
623 | case OVS_TUNNEL_KEY_ATTR_OAM: |
624 | tun_flags |= TUNNEL_OAM; | |
625 | break; | |
f5796684 | 626 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
1dd144cf TG |
627 | if (opts_type) { |
628 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
629 | return -EINVAL; | |
630 | } | |
631 | ||
05da5898 JR |
632 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); |
633 | if (err) | |
634 | return err; | |
f5796684 | 635 | |
1dd144cf TG |
636 | tun_flags |= TUNNEL_GENEVE_OPT; |
637 | opts_type = type; | |
638 | break; | |
639 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
640 | if (opts_type) { | |
641 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
642 | return -EINVAL; | |
643 | } | |
644 | ||
645 | err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log); | |
646 | if (err) | |
647 | return err; | |
648 | ||
649 | tun_flags |= TUNNEL_VXLAN_OPT; | |
650 | opts_type = type; | |
f5796684 | 651 | break; |
e6445719 | 652 | default: |
6b26ba3a | 653 | OVS_NLERR(log, "Unknown IP tunnel attribute %d", |
f5796684 | 654 | type); |
e6445719 PS |
655 | return -EINVAL; |
656 | } | |
657 | } | |
658 | ||
659 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
00a93bab JB |
660 | if (is_mask) |
661 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true); | |
662 | else | |
6b26ba3a JB |
663 | SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET, |
664 | false); | |
e6445719 PS |
665 | |
666 | if (rem > 0) { | |
6b26ba3a | 667 | OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.", |
05da5898 | 668 | rem); |
e6445719 PS |
669 | return -EINVAL; |
670 | } | |
671 | ||
6b26ba3a JB |
672 | if (ipv4 && ipv6) { |
673 | OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes"); | |
674 | return -EINVAL; | |
675 | } | |
676 | ||
e6445719 | 677 | if (!is_mask) { |
6b26ba3a JB |
678 | if (!ipv4 && !ipv6) { |
679 | OVS_NLERR(log, "IP tunnel dst address not specified"); | |
680 | return -EINVAL; | |
681 | } | |
682 | if (ipv4 && !match->key->tun_key.u.ipv4.dst) { | |
05da5898 | 683 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); |
e6445719 PS |
684 | return -EINVAL; |
685 | } | |
6b26ba3a JB |
686 | if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) { |
687 | OVS_NLERR(log, "IPv6 tunnel dst address is zero"); | |
688 | return -EINVAL; | |
689 | } | |
e6445719 PS |
690 | |
691 | if (!ttl) { | |
6b26ba3a | 692 | OVS_NLERR(log, "IP tunnel TTL not specified."); |
e6445719 PS |
693 | return -EINVAL; |
694 | } | |
695 | } | |
696 | ||
1dd144cf TG |
697 | return opts_type; |
698 | } | |
699 | ||
700 | static int vxlan_opt_to_nlattr(struct sk_buff *skb, | |
701 | const void *tun_opts, int swkey_tun_opts_len) | |
702 | { | |
614732ea | 703 | const struct vxlan_metadata *opts = tun_opts; |
1dd144cf TG |
704 | struct nlattr *nla; |
705 | ||
706 | nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); | |
707 | if (!nla) | |
708 | return -EMSGSIZE; | |
709 | ||
710 | if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0) | |
711 | return -EMSGSIZE; | |
712 | ||
713 | nla_nest_end(skb, nla); | |
e6445719 PS |
714 | return 0; |
715 | } | |
716 | ||
6b26ba3a JB |
717 | static int __ip_tun_to_nlattr(struct sk_buff *skb, |
718 | const struct ip_tunnel_key *output, | |
719 | const void *tun_opts, int swkey_tun_opts_len, | |
720 | unsigned short tun_proto) | |
e6445719 | 721 | { |
e6445719 | 722 | if (output->tun_flags & TUNNEL_KEY && |
b46f6ded ND |
723 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id, |
724 | OVS_TUNNEL_KEY_ATTR_PAD)) | |
e6445719 | 725 | return -EMSGSIZE; |
6b26ba3a JB |
726 | switch (tun_proto) { |
727 | case AF_INET: | |
728 | if (output->u.ipv4.src && | |
729 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, | |
730 | output->u.ipv4.src)) | |
731 | return -EMSGSIZE; | |
732 | if (output->u.ipv4.dst && | |
733 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, | |
734 | output->u.ipv4.dst)) | |
735 | return -EMSGSIZE; | |
736 | break; | |
737 | case AF_INET6: | |
738 | if (!ipv6_addr_any(&output->u.ipv6.src) && | |
739 | nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC, | |
740 | &output->u.ipv6.src)) | |
741 | return -EMSGSIZE; | |
742 | if (!ipv6_addr_any(&output->u.ipv6.dst) && | |
743 | nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST, | |
744 | &output->u.ipv6.dst)) | |
745 | return -EMSGSIZE; | |
746 | break; | |
747 | } | |
7c383fb2 JB |
748 | if (output->tos && |
749 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos)) | |
e6445719 | 750 | return -EMSGSIZE; |
7c383fb2 | 751 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl)) |
e6445719 PS |
752 | return -EMSGSIZE; |
753 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
67fa0341 | 754 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
e6445719 PS |
755 | return -EMSGSIZE; |
756 | if ((output->tun_flags & TUNNEL_CSUM) && | |
67fa0341 JG |
757 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
758 | return -EMSGSIZE; | |
8f0aad6f WZ |
759 | if (output->tp_src && |
760 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) | |
761 | return -EMSGSIZE; | |
762 | if (output->tp_dst && | |
763 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) | |
764 | return -EMSGSIZE; | |
67fa0341 JG |
765 | if ((output->tun_flags & TUNNEL_OAM) && |
766 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
e6445719 | 767 | return -EMSGSIZE; |
fc4099f1 | 768 | if (swkey_tun_opts_len) { |
1dd144cf TG |
769 | if (output->tun_flags & TUNNEL_GENEVE_OPT && |
770 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
771 | swkey_tun_opts_len, tun_opts)) | |
772 | return -EMSGSIZE; | |
773 | else if (output->tun_flags & TUNNEL_VXLAN_OPT && | |
774 | vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len)) | |
775 | return -EMSGSIZE; | |
776 | } | |
e6445719 | 777 | |
e6445719 PS |
778 | return 0; |
779 | } | |
780 | ||
6b26ba3a JB |
781 | static int ip_tun_to_nlattr(struct sk_buff *skb, |
782 | const struct ip_tunnel_key *output, | |
783 | const void *tun_opts, int swkey_tun_opts_len, | |
784 | unsigned short tun_proto) | |
f5796684 JG |
785 | { |
786 | struct nlattr *nla; | |
787 | int err; | |
788 | ||
789 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
790 | if (!nla) | |
791 | return -EMSGSIZE; | |
792 | ||
6b26ba3a JB |
793 | err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len, |
794 | tun_proto); | |
f5796684 JG |
795 | if (err) |
796 | return err; | |
797 | ||
798 | nla_nest_end(skb, nla); | |
799 | return 0; | |
800 | } | |
801 | ||
fc4099f1 PS |
802 | int ovs_nla_put_tunnel_info(struct sk_buff *skb, |
803 | struct ip_tunnel_info *tun_info) | |
8f0aad6f | 804 | { |
ba3e2084 DM |
805 | return __ip_tun_to_nlattr(skb, &tun_info->key, |
806 | ip_tunnel_info_opts(tun_info), | |
807 | tun_info->options_len, | |
808 | ip_tunnel_info_af(tun_info)); | |
8f0aad6f WZ |
809 | } |
810 | ||
018c1dda EG |
811 | static int encode_vlan_from_nlattrs(struct sw_flow_match *match, |
812 | const struct nlattr *a[], | |
813 | bool is_mask, bool inner) | |
814 | { | |
815 | __be16 tci = 0; | |
816 | __be16 tpid = 0; | |
817 | ||
818 | if (a[OVS_KEY_ATTR_VLAN]) | |
819 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
820 | ||
821 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
822 | tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
823 | ||
824 | if (likely(!inner)) { | |
825 | SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask); | |
826 | SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask); | |
827 | } else { | |
828 | SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask); | |
829 | SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask); | |
830 | } | |
831 | return 0; | |
832 | } | |
833 | ||
834 | static int validate_vlan_from_nlattrs(const struct sw_flow_match *match, | |
835 | u64 key_attrs, bool inner, | |
836 | const struct nlattr **a, bool log) | |
837 | { | |
838 | __be16 tci = 0; | |
839 | ||
840 | if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
841 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
842 | eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) { | |
843 | /* Not a VLAN. */ | |
844 | return 0; | |
845 | } | |
846 | ||
847 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
848 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
849 | OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN"); | |
850 | return -EINVAL; | |
851 | } | |
852 | ||
853 | if (a[OVS_KEY_ATTR_VLAN]) | |
854 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
855 | ||
856 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
857 | if (tci) { | |
858 | OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.", | |
859 | (inner) ? "C-VLAN" : "VLAN"); | |
860 | return -EINVAL; | |
861 | } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) { | |
862 | /* Corner case for truncated VLAN header. */ | |
863 | OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.", | |
864 | (inner) ? "C-VLAN" : "VLAN"); | |
865 | return -EINVAL; | |
866 | } | |
867 | } | |
868 | ||
869 | return 1; | |
870 | } | |
871 | ||
872 | static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match, | |
873 | u64 key_attrs, bool inner, | |
874 | const struct nlattr **a, bool log) | |
875 | { | |
876 | __be16 tci = 0; | |
877 | __be16 tpid = 0; | |
878 | bool encap_valid = !!(match->key->eth.vlan.tci & | |
879 | htons(VLAN_TAG_PRESENT)); | |
880 | bool i_encap_valid = !!(match->key->eth.cvlan.tci & | |
881 | htons(VLAN_TAG_PRESENT)); | |
882 | ||
883 | if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) { | |
884 | /* Not a VLAN. */ | |
885 | return 0; | |
886 | } | |
887 | ||
888 | if ((!inner && !encap_valid) || (inner && !i_encap_valid)) { | |
889 | OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.", | |
890 | (inner) ? "C-VLAN" : "VLAN"); | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | if (a[OVS_KEY_ATTR_VLAN]) | |
895 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
896 | ||
897 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
898 | tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
899 | ||
900 | if (tpid != htons(0xffff)) { | |
901 | OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).", | |
902 | (inner) ? "C-VLAN" : "VLAN", ntohs(tpid)); | |
903 | return -EINVAL; | |
904 | } | |
905 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
906 | OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.", | |
907 | (inner) ? "C-VLAN" : "VLAN"); | |
908 | return -EINVAL; | |
909 | } | |
910 | ||
911 | return 1; | |
912 | } | |
913 | ||
914 | static int __parse_vlan_from_nlattrs(struct sw_flow_match *match, | |
915 | u64 *key_attrs, bool inner, | |
916 | const struct nlattr **a, bool is_mask, | |
917 | bool log) | |
918 | { | |
919 | int err; | |
920 | const struct nlattr *encap; | |
921 | ||
922 | if (!is_mask) | |
923 | err = validate_vlan_from_nlattrs(match, *key_attrs, inner, | |
924 | a, log); | |
925 | else | |
926 | err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner, | |
927 | a, log); | |
928 | if (err <= 0) | |
929 | return err; | |
930 | ||
931 | err = encode_vlan_from_nlattrs(match, a, is_mask, inner); | |
932 | if (err) | |
933 | return err; | |
934 | ||
935 | *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
936 | *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
937 | *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
938 | ||
939 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
940 | ||
941 | if (!is_mask) | |
942 | err = parse_flow_nlattrs(encap, a, key_attrs, log); | |
943 | else | |
944 | err = parse_flow_mask_nlattrs(encap, a, key_attrs, log); | |
945 | ||
946 | return err; | |
947 | } | |
948 | ||
949 | static int parse_vlan_from_nlattrs(struct sw_flow_match *match, | |
950 | u64 *key_attrs, const struct nlattr **a, | |
951 | bool is_mask, bool log) | |
952 | { | |
953 | int err; | |
954 | bool encap_valid = false; | |
955 | ||
956 | err = __parse_vlan_from_nlattrs(match, key_attrs, false, a, | |
957 | is_mask, log); | |
958 | if (err) | |
959 | return err; | |
960 | ||
961 | encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT)); | |
962 | if (encap_valid) { | |
963 | err = __parse_vlan_from_nlattrs(match, key_attrs, true, a, | |
964 | is_mask, log); | |
965 | if (err) | |
966 | return err; | |
967 | } | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
c2ac6673 JS |
972 | static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, |
973 | u64 *attrs, const struct nlattr **a, | |
974 | bool is_mask, bool log) | |
e6445719 | 975 | { |
971427f3 AZ |
976 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
977 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
978 | ||
979 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
980 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
981 | } | |
982 | ||
983 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
984 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
985 | ||
986 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
987 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
988 | } | |
989 | ||
e6445719 PS |
990 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
991 | SW_FLOW_KEY_PUT(match, phy.priority, | |
992 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
993 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
994 | } | |
995 | ||
996 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
997 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
998 | ||
426cda5c | 999 | if (is_mask) { |
e6445719 | 1000 | in_port = 0xffffffff; /* Always exact match in_port. */ |
426cda5c | 1001 | } else if (in_port >= DP_MAX_PORTS) { |
05da5898 | 1002 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
426cda5c | 1003 | in_port, DP_MAX_PORTS); |
e6445719 | 1004 | return -EINVAL; |
426cda5c | 1005 | } |
e6445719 PS |
1006 | |
1007 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
1008 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
1009 | } else if (!is_mask) { | |
1010 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
1011 | } | |
1012 | ||
1013 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
1014 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
1015 | ||
1016 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
1017 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
1018 | } | |
1019 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
6b26ba3a JB |
1020 | if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, |
1021 | is_mask, log) < 0) | |
e6445719 PS |
1022 | return -EINVAL; |
1023 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
1024 | } | |
7f8a436e JS |
1025 | |
1026 | if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && | |
c2ac6673 | 1027 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { |
fbccce59 | 1028 | u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]); |
7f8a436e | 1029 | |
9e384715 | 1030 | if (ct_state & ~CT_SUPPORTED_MASK) { |
fbccce59 | 1031 | OVS_NLERR(log, "ct_state flags %08x unsupported", |
6f225952 JS |
1032 | ct_state); |
1033 | return -EINVAL; | |
1034 | } | |
7f8a436e JS |
1035 | |
1036 | SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask); | |
1037 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); | |
1038 | } | |
1039 | if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && | |
c2ac6673 | 1040 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) { |
7f8a436e JS |
1041 | u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); |
1042 | ||
1043 | SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask); | |
1044 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); | |
1045 | } | |
182e3042 | 1046 | if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) && |
c2ac6673 | 1047 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) { |
182e3042 JS |
1048 | u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]); |
1049 | ||
1050 | SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask); | |
1051 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK); | |
1052 | } | |
33db4125 JS |
1053 | if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) && |
1054 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) { | |
1055 | const struct ovs_key_ct_labels *cl; | |
c2ac6673 | 1056 | |
33db4125 JS |
1057 | cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]); |
1058 | SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels, | |
c2ac6673 | 1059 | sizeof(*cl), is_mask); |
33db4125 | 1060 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS); |
c2ac6673 | 1061 | } |
e6445719 PS |
1062 | return 0; |
1063 | } | |
1064 | ||
c2ac6673 JS |
1065 | static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match, |
1066 | u64 attrs, const struct nlattr **a, | |
1067 | bool is_mask, bool log) | |
e6445719 PS |
1068 | { |
1069 | int err; | |
e6445719 | 1070 | |
c2ac6673 | 1071 | err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log); |
e6445719 PS |
1072 | if (err) |
1073 | return err; | |
1074 | ||
1075 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
1076 | const struct ovs_key_ethernet *eth_key; | |
1077 | ||
1078 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
1079 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1080 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1081 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1082 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1083 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
1084 | } | |
1085 | ||
1086 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
018c1dda EG |
1087 | /* VLAN attribute is always parsed before getting here since it |
1088 | * may occur multiple times. | |
1089 | */ | |
1090 | OVS_NLERR(log, "VLAN attribute unexpected."); | |
1091 | return -EINVAL; | |
a85311bf | 1092 | } |
e6445719 PS |
1093 | |
1094 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
1095 | __be16 eth_type; | |
1096 | ||
1097 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1098 | if (is_mask) { | |
1099 | /* Always exact match EtherType. */ | |
1100 | eth_type = htons(0xffff); | |
6713fc9b | 1101 | } else if (!eth_proto_is_802_3(eth_type)) { |
05da5898 JR |
1102 | OVS_NLERR(log, "EtherType %x is less than min %x", |
1103 | ntohs(eth_type), ETH_P_802_3_MIN); | |
e6445719 PS |
1104 | return -EINVAL; |
1105 | } | |
1106 | ||
1107 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1108 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1109 | } else if (!is_mask) { | |
1110 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
1111 | } | |
1112 | ||
1113 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1114 | const struct ovs_key_ipv4 *ipv4_key; | |
1115 | ||
1116 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1117 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
1118 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
1119 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
1120 | return -EINVAL; |
1121 | } | |
1122 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1123 | ipv4_key->ipv4_proto, is_mask); | |
1124 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1125 | ipv4_key->ipv4_tos, is_mask); | |
1126 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1127 | ipv4_key->ipv4_ttl, is_mask); | |
1128 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1129 | ipv4_key->ipv4_frag, is_mask); | |
1130 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1131 | ipv4_key->ipv4_src, is_mask); | |
1132 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1133 | ipv4_key->ipv4_dst, is_mask); | |
1134 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
1135 | } | |
1136 | ||
1137 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
1138 | const struct ovs_key_ipv6 *ipv6_key; | |
1139 | ||
1140 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
1141 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
1142 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
1143 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
1144 | return -EINVAL; |
1145 | } | |
fecaef85 | 1146 | |
d3052bb5 | 1147 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { |
14591433 | 1148 | OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n", |
fecaef85 JR |
1149 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); |
1150 | return -EINVAL; | |
1151 | } | |
1152 | ||
e6445719 PS |
1153 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1154 | ipv6_key->ipv6_label, is_mask); | |
1155 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1156 | ipv6_key->ipv6_proto, is_mask); | |
1157 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1158 | ipv6_key->ipv6_tclass, is_mask); | |
1159 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1160 | ipv6_key->ipv6_hlimit, is_mask); | |
1161 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1162 | ipv6_key->ipv6_frag, is_mask); | |
1163 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1164 | ipv6_key->ipv6_src, | |
1165 | sizeof(match->key->ipv6.addr.src), | |
1166 | is_mask); | |
1167 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1168 | ipv6_key->ipv6_dst, | |
1169 | sizeof(match->key->ipv6.addr.dst), | |
1170 | is_mask); | |
1171 | ||
1172 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
1173 | } | |
1174 | ||
1175 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
1176 | const struct ovs_key_arp *arp_key; | |
1177 | ||
1178 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1179 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
05da5898 | 1180 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
e6445719 PS |
1181 | arp_key->arp_op); |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1186 | arp_key->arp_sip, is_mask); | |
1187 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1188 | arp_key->arp_tip, is_mask); | |
1189 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1190 | ntohs(arp_key->arp_op), is_mask); | |
1191 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1192 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1193 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1194 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1195 | ||
1196 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
1197 | } | |
1198 | ||
25cd9ba0 SH |
1199 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { |
1200 | const struct ovs_key_mpls *mpls_key; | |
1201 | ||
1202 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
1203 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
1204 | mpls_key->mpls_lse, is_mask); | |
1205 | ||
1206 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
1207 | } | |
1208 | ||
e6445719 PS |
1209 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
1210 | const struct ovs_key_tcp *tcp_key; | |
1211 | ||
1212 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
1213 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
1214 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
1215 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
1216 | } | |
1217 | ||
5eb26b15 | 1218 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
1b760fb9 JS |
1219 | SW_FLOW_KEY_PUT(match, tp.flags, |
1220 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
1221 | is_mask); | |
5eb26b15 JR |
1222 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
1223 | } | |
1224 | ||
e6445719 PS |
1225 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
1226 | const struct ovs_key_udp *udp_key; | |
1227 | ||
1228 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
1229 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
1230 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
1231 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
1232 | } | |
1233 | ||
1234 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
1235 | const struct ovs_key_sctp *sctp_key; | |
1236 | ||
1237 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
1238 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
1239 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
1240 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
1241 | } | |
1242 | ||
1243 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
1244 | const struct ovs_key_icmp *icmp_key; | |
1245 | ||
1246 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 1247 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1248 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 1249 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1250 | htons(icmp_key->icmp_code), is_mask); |
1251 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
1252 | } | |
1253 | ||
1254 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
1255 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1256 | ||
1257 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 1258 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1259 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 1260 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1261 | htons(icmpv6_key->icmpv6_code), is_mask); |
1262 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
1263 | } | |
1264 | ||
1265 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
1266 | const struct ovs_key_nd *nd_key; | |
1267 | ||
1268 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1269 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1270 | nd_key->nd_target, | |
1271 | sizeof(match->key->ipv6.nd.target), | |
1272 | is_mask); | |
1273 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1274 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1275 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1276 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1277 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
1278 | } | |
1279 | ||
426cda5c | 1280 | if (attrs != 0) { |
05da5898 | 1281 | OVS_NLERR(log, "Unknown key attributes %llx", |
426cda5c | 1282 | (unsigned long long)attrs); |
e6445719 | 1283 | return -EINVAL; |
426cda5c | 1284 | } |
e6445719 PS |
1285 | |
1286 | return 0; | |
1287 | } | |
1288 | ||
81bfe3c3 TG |
1289 | static void nlattr_set(struct nlattr *attr, u8 val, |
1290 | const struct ovs_len_tbl *tbl) | |
e6445719 | 1291 | { |
f47de068 PS |
1292 | struct nlattr *nla; |
1293 | int rem; | |
e6445719 | 1294 | |
f47de068 PS |
1295 | /* The nlattr stream should already have been validated */ |
1296 | nla_for_each_nested(nla, attr, rem) { | |
982b5270 JG |
1297 | if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) { |
1298 | if (tbl[nla_type(nla)].next) | |
1299 | tbl = tbl[nla_type(nla)].next; | |
1300 | nlattr_set(nla, val, tbl); | |
1301 | } else { | |
f47de068 | 1302 | memset(nla_data(nla), val, nla_len(nla)); |
982b5270 | 1303 | } |
9e384715 JS |
1304 | |
1305 | if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE) | |
1306 | *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK; | |
f47de068 PS |
1307 | } |
1308 | } | |
1309 | ||
1310 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1311 | { | |
81bfe3c3 | 1312 | nlattr_set(attr, val, ovs_key_lens); |
e6445719 PS |
1313 | } |
1314 | ||
1315 | /** | |
1316 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1317 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1318 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1319 | * does not include any don't care bit. | |
c2ac6673 | 1320 | * @net: Used to determine per-namespace field support. |
e6445719 PS |
1321 | * @match: receives the extracted flow match information. |
1322 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1323 | * sequence. The fields should of the packet that triggered the creation | |
1324 | * of this flow. | |
1325 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1326 | * attribute specifies the mask field of the wildcarded flow. | |
05da5898 JR |
1327 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1328 | * probing for feature compatibility this should be passed in as false to | |
1329 | * suppress unnecessary error logging. | |
e6445719 | 1330 | */ |
c2ac6673 | 1331 | int ovs_nla_get_match(struct net *net, struct sw_flow_match *match, |
a85311bf | 1332 | const struct nlattr *nla_key, |
05da5898 JR |
1333 | const struct nlattr *nla_mask, |
1334 | bool log) | |
e6445719 PS |
1335 | { |
1336 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
f47de068 | 1337 | struct nlattr *newmask = NULL; |
e6445719 PS |
1338 | u64 key_attrs = 0; |
1339 | u64 mask_attrs = 0; | |
e6445719 PS |
1340 | int err; |
1341 | ||
05da5898 | 1342 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
e6445719 PS |
1343 | if (err) |
1344 | return err; | |
1345 | ||
018c1dda EG |
1346 | err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log); |
1347 | if (err) | |
1348 | return err; | |
e6445719 | 1349 | |
c2ac6673 | 1350 | err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log); |
e6445719 PS |
1351 | if (err) |
1352 | return err; | |
1353 | ||
a85311bf PS |
1354 | if (match->mask) { |
1355 | if (!nla_mask) { | |
1356 | /* Create an exact match mask. We need to set to 0xff | |
1357 | * all the 'match->mask' fields that have been touched | |
1358 | * in 'match->key'. We cannot simply memset | |
1359 | * 'match->mask', because padding bytes and fields not | |
1360 | * specified in 'match->key' should be left to 0. | |
1361 | * Instead, we use a stream of netlink attributes, | |
1362 | * copied from 'key' and set to 0xff. | |
1363 | * ovs_key_from_nlattrs() will take care of filling | |
1364 | * 'match->mask' appropriately. | |
1365 | */ | |
1366 | newmask = kmemdup(nla_key, | |
1367 | nla_total_size(nla_len(nla_key)), | |
1368 | GFP_KERNEL); | |
1369 | if (!newmask) | |
1370 | return -ENOMEM; | |
f47de068 | 1371 | |
a85311bf | 1372 | mask_set_nlattr(newmask, 0xff); |
f47de068 | 1373 | |
a85311bf PS |
1374 | /* The userspace does not send tunnel attributes that |
1375 | * are 0, but we should not wildcard them nonetheless. | |
1376 | */ | |
00a93bab | 1377 | if (match->key->tun_proto) |
a85311bf PS |
1378 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, |
1379 | 0xff, true); | |
f47de068 | 1380 | |
a85311bf PS |
1381 | nla_mask = newmask; |
1382 | } | |
f47de068 | 1383 | |
05da5898 | 1384 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
e6445719 | 1385 | if (err) |
f47de068 | 1386 | goto free_newmask; |
e6445719 | 1387 | |
a85311bf | 1388 | /* Always match on tci. */ |
018c1dda EG |
1389 | SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true); |
1390 | SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true); | |
e6445719 | 1391 | |
018c1dda EG |
1392 | err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log); |
1393 | if (err) | |
1394 | goto free_newmask; | |
e6445719 | 1395 | |
c2ac6673 JS |
1396 | err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true, |
1397 | log); | |
e6445719 | 1398 | if (err) |
f47de068 | 1399 | goto free_newmask; |
e6445719 PS |
1400 | } |
1401 | ||
05da5898 | 1402 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
f47de068 | 1403 | err = -EINVAL; |
e6445719 | 1404 | |
f47de068 PS |
1405 | free_newmask: |
1406 | kfree(newmask); | |
1407 | return err; | |
e6445719 PS |
1408 | } |
1409 | ||
74ed7ab9 JS |
1410 | static size_t get_ufid_len(const struct nlattr *attr, bool log) |
1411 | { | |
1412 | size_t len; | |
1413 | ||
1414 | if (!attr) | |
1415 | return 0; | |
1416 | ||
1417 | len = nla_len(attr); | |
1418 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1419 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1420 | nla_len(attr), MAX_UFID_LENGTH); | |
1421 | return 0; | |
1422 | } | |
1423 | ||
1424 | return len; | |
1425 | } | |
1426 | ||
1427 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1428 | * or false otherwise. | |
1429 | */ | |
1430 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1431 | bool log) | |
1432 | { | |
1433 | sfid->ufid_len = get_ufid_len(attr, log); | |
1434 | if (sfid->ufid_len) | |
1435 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1436 | ||
1437 | return sfid->ufid_len; | |
1438 | } | |
1439 | ||
1440 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1441 | const struct sw_flow_key *key, bool log) | |
1442 | { | |
1443 | struct sw_flow_key *new_key; | |
1444 | ||
1445 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1446 | return 0; | |
1447 | ||
1448 | /* If UFID was not provided, use unmasked key. */ | |
1449 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1450 | if (!new_key) | |
1451 | return -ENOMEM; | |
1452 | memcpy(new_key, key, sizeof(*key)); | |
1453 | sfid->unmasked_key = new_key; | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1459 | { | |
1460 | return attr ? nla_get_u32(attr) : 0; | |
1461 | } | |
1462 | ||
e6445719 PS |
1463 | /** |
1464 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 1465 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
1466 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1467 | * sequence. | |
05da5898 JR |
1468 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1469 | * probing for feature compatibility this should be passed in as false to | |
1470 | * suppress unnecessary error logging. | |
e6445719 PS |
1471 | * |
1472 | * This parses a series of Netlink attributes that form a flow key, which must | |
1473 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1474 | * get the metadata, that is, the parts of the flow key that cannot be | |
1475 | * extracted from the packet itself. | |
1476 | */ | |
1477 | ||
c2ac6673 | 1478 | int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr, |
05da5898 JR |
1479 | struct sw_flow_key *key, |
1480 | bool log) | |
e6445719 | 1481 | { |
e6445719 | 1482 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 1483 | struct sw_flow_match match; |
e6445719 PS |
1484 | u64 attrs = 0; |
1485 | int err; | |
e6445719 | 1486 | |
05da5898 | 1487 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
e6445719 PS |
1488 | if (err) |
1489 | return -EINVAL; | |
1490 | ||
1491 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 1492 | match.key = key; |
e6445719 | 1493 | |
7f8a436e | 1494 | memset(&key->ct, 0, sizeof(key->ct)); |
83c8df26 | 1495 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 1496 | |
c2ac6673 | 1497 | return metadata_from_nlattrs(net, &match, &attrs, a, false, log); |
e6445719 PS |
1498 | } |
1499 | ||
018c1dda EG |
1500 | static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh, |
1501 | bool is_mask) | |
1502 | { | |
1503 | __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff); | |
1504 | ||
1505 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1506 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci)) | |
1507 | return -EMSGSIZE; | |
1508 | return 0; | |
1509 | } | |
1510 | ||
5b4237bb JS |
1511 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, |
1512 | const struct sw_flow_key *output, bool is_mask, | |
1513 | struct sk_buff *skb) | |
e6445719 PS |
1514 | { |
1515 | struct ovs_key_ethernet *eth_key; | |
018c1dda EG |
1516 | struct nlattr *nla; |
1517 | struct nlattr *encap = NULL; | |
1518 | struct nlattr *in_encap = NULL; | |
e6445719 | 1519 | |
971427f3 AZ |
1520 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
1521 | goto nla_put_failure; | |
1522 | ||
1523 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1524 | goto nla_put_failure; | |
1525 | ||
e6445719 PS |
1526 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1527 | goto nla_put_failure; | |
1528 | ||
00a93bab | 1529 | if ((swkey->tun_proto || is_mask)) { |
d91641d9 | 1530 | const void *opts = NULL; |
f5796684 JG |
1531 | |
1532 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
d91641d9 | 1533 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); |
f5796684 | 1534 | |
6b26ba3a JB |
1535 | if (ip_tun_to_nlattr(skb, &output->tun_key, opts, |
1536 | swkey->tun_opts_len, swkey->tun_proto)) | |
f5796684 JG |
1537 | goto nla_put_failure; |
1538 | } | |
e6445719 PS |
1539 | |
1540 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1541 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1542 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1543 | goto nla_put_failure; | |
1544 | } else { | |
1545 | u16 upper_u16; | |
1546 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1547 | ||
1548 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1549 | (upper_u16 << 16) | output->phy.in_port)) | |
1550 | goto nla_put_failure; | |
1551 | } | |
1552 | ||
1553 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1554 | goto nla_put_failure; | |
1555 | ||
7f8a436e JS |
1556 | if (ovs_ct_put_key(output, skb)) |
1557 | goto nla_put_failure; | |
1558 | ||
e6445719 PS |
1559 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1560 | if (!nla) | |
1561 | goto nla_put_failure; | |
1562 | ||
1563 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1564 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1565 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 | 1566 | |
018c1dda EG |
1567 | if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) { |
1568 | if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask)) | |
e6445719 PS |
1569 | goto nla_put_failure; |
1570 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
018c1dda | 1571 | if (!swkey->eth.vlan.tci) |
e6445719 | 1572 | goto unencap; |
018c1dda EG |
1573 | |
1574 | if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) { | |
1575 | if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask)) | |
1576 | goto nla_put_failure; | |
1577 | in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1578 | if (!swkey->eth.cvlan.tci) | |
1579 | goto unencap; | |
1580 | } | |
1581 | } | |
e6445719 PS |
1582 | |
1583 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1584 | /* | |
1585 | * Ethertype 802.2 is represented in the netlink with omitted | |
1586 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1587 | * 0xffff in the mask attribute. Ethertype can also | |
1588 | * be wildcarded. | |
1589 | */ | |
1590 | if (is_mask && output->eth.type) | |
1591 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1592 | output->eth.type)) | |
1593 | goto nla_put_failure; | |
1594 | goto unencap; | |
1595 | } | |
1596 | ||
1597 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1598 | goto nla_put_failure; | |
1599 | ||
018c1dda EG |
1600 | if (eth_type_vlan(swkey->eth.type)) { |
1601 | /* There are 3 VLAN tags, we don't know anything about the rest | |
1602 | * of the packet, so truncate here. | |
1603 | */ | |
1604 | WARN_ON_ONCE(!(encap && in_encap)); | |
1605 | goto unencap; | |
1606 | } | |
1607 | ||
e6445719 PS |
1608 | if (swkey->eth.type == htons(ETH_P_IP)) { |
1609 | struct ovs_key_ipv4 *ipv4_key; | |
1610 | ||
1611 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1612 | if (!nla) | |
1613 | goto nla_put_failure; | |
1614 | ipv4_key = nla_data(nla); | |
1615 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1616 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1617 | ipv4_key->ipv4_proto = output->ip.proto; | |
1618 | ipv4_key->ipv4_tos = output->ip.tos; | |
1619 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1620 | ipv4_key->ipv4_frag = output->ip.frag; | |
1621 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1622 | struct ovs_key_ipv6 *ipv6_key; | |
1623 | ||
1624 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1625 | if (!nla) | |
1626 | goto nla_put_failure; | |
1627 | ipv6_key = nla_data(nla); | |
1628 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1629 | sizeof(ipv6_key->ipv6_src)); | |
1630 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1631 | sizeof(ipv6_key->ipv6_dst)); | |
1632 | ipv6_key->ipv6_label = output->ipv6.label; | |
1633 | ipv6_key->ipv6_proto = output->ip.proto; | |
1634 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1635 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1636 | ipv6_key->ipv6_frag = output->ip.frag; | |
1637 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1638 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1639 | struct ovs_key_arp *arp_key; | |
1640 | ||
1641 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1642 | if (!nla) | |
1643 | goto nla_put_failure; | |
1644 | arp_key = nla_data(nla); | |
1645 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1646 | arp_key->arp_sip = output->ipv4.addr.src; | |
1647 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1648 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1649 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1650 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
25cd9ba0 SH |
1651 | } else if (eth_p_mpls(swkey->eth.type)) { |
1652 | struct ovs_key_mpls *mpls_key; | |
1653 | ||
1654 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1655 | if (!nla) | |
1656 | goto nla_put_failure; | |
1657 | mpls_key = nla_data(nla); | |
1658 | mpls_key->mpls_lse = output->mpls.top_lse; | |
e6445719 PS |
1659 | } |
1660 | ||
1661 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1662 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1663 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1664 | ||
1665 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1666 | struct ovs_key_tcp *tcp_key; | |
1667 | ||
1668 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1669 | if (!nla) | |
1670 | goto nla_put_failure; | |
1671 | tcp_key = nla_data(nla); | |
1139e241 JR |
1672 | tcp_key->tcp_src = output->tp.src; |
1673 | tcp_key->tcp_dst = output->tp.dst; | |
1674 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1675 | output->tp.flags)) | |
1676 | goto nla_put_failure; | |
e6445719 PS |
1677 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1678 | struct ovs_key_udp *udp_key; | |
1679 | ||
1680 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1681 | if (!nla) | |
1682 | goto nla_put_failure; | |
1683 | udp_key = nla_data(nla); | |
1139e241 JR |
1684 | udp_key->udp_src = output->tp.src; |
1685 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1686 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1687 | struct ovs_key_sctp *sctp_key; | |
1688 | ||
1689 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1690 | if (!nla) | |
1691 | goto nla_put_failure; | |
1692 | sctp_key = nla_data(nla); | |
1139e241 JR |
1693 | sctp_key->sctp_src = output->tp.src; |
1694 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1695 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1696 | swkey->ip.proto == IPPROTO_ICMP) { | |
1697 | struct ovs_key_icmp *icmp_key; | |
1698 | ||
1699 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1700 | if (!nla) | |
1701 | goto nla_put_failure; | |
1702 | icmp_key = nla_data(nla); | |
1139e241 JR |
1703 | icmp_key->icmp_type = ntohs(output->tp.src); |
1704 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1705 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1706 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1707 | struct ovs_key_icmpv6 *icmpv6_key; | |
1708 | ||
1709 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1710 | sizeof(*icmpv6_key)); | |
1711 | if (!nla) | |
1712 | goto nla_put_failure; | |
1713 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1714 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1715 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1716 | |
1717 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1718 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1719 | struct ovs_key_nd *nd_key; | |
1720 | ||
1721 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1722 | if (!nla) | |
1723 | goto nla_put_failure; | |
1724 | nd_key = nla_data(nla); | |
1725 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1726 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1727 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1728 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1729 | } |
1730 | } | |
1731 | } | |
1732 | ||
1733 | unencap: | |
018c1dda EG |
1734 | if (in_encap) |
1735 | nla_nest_end(skb, in_encap); | |
e6445719 PS |
1736 | if (encap) |
1737 | nla_nest_end(skb, encap); | |
1738 | ||
1739 | return 0; | |
1740 | ||
1741 | nla_put_failure: | |
1742 | return -EMSGSIZE; | |
1743 | } | |
1744 | ||
5b4237bb JS |
1745 | int ovs_nla_put_key(const struct sw_flow_key *swkey, |
1746 | const struct sw_flow_key *output, int attr, bool is_mask, | |
1747 | struct sk_buff *skb) | |
1748 | { | |
1749 | int err; | |
1750 | struct nlattr *nla; | |
1751 | ||
1752 | nla = nla_nest_start(skb, attr); | |
1753 | if (!nla) | |
1754 | return -EMSGSIZE; | |
1755 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
1756 | if (err) | |
1757 | return err; | |
1758 | nla_nest_end(skb, nla); | |
1759 | ||
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | /* Called with ovs_mutex or RCU read lock. */ | |
74ed7ab9 JS |
1764 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) |
1765 | { | |
1766 | if (ovs_identifier_is_ufid(&flow->id)) | |
1767 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
1768 | flow->id.ufid); | |
1769 | ||
1770 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
1771 | OVS_FLOW_ATTR_KEY, false, skb); | |
1772 | } | |
1773 | ||
1774 | /* Called with ovs_mutex or RCU read lock. */ | |
1775 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
5b4237bb | 1776 | { |
26ad0b83 | 1777 | return ovs_nla_put_key(&flow->key, &flow->key, |
5b4237bb JS |
1778 | OVS_FLOW_ATTR_KEY, false, skb); |
1779 | } | |
1780 | ||
1781 | /* Called with ovs_mutex or RCU read lock. */ | |
1782 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
1783 | { | |
1784 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
1785 | OVS_FLOW_ATTR_MASK, true, skb); | |
1786 | } | |
1787 | ||
e6445719 PS |
1788 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
1789 | ||
05da5898 | 1790 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
e6445719 PS |
1791 | { |
1792 | struct sw_flow_actions *sfa; | |
1793 | ||
426cda5c | 1794 | if (size > MAX_ACTIONS_BUFSIZE) { |
05da5898 | 1795 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
e6445719 | 1796 | return ERR_PTR(-EINVAL); |
426cda5c | 1797 | } |
e6445719 PS |
1798 | |
1799 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1800 | if (!sfa) | |
1801 | return ERR_PTR(-ENOMEM); | |
1802 | ||
1803 | sfa->actions_len = 0; | |
1804 | return sfa; | |
1805 | } | |
1806 | ||
34ae932a TG |
1807 | static void ovs_nla_free_set_action(const struct nlattr *a) |
1808 | { | |
1809 | const struct nlattr *ovs_key = nla_data(a); | |
1810 | struct ovs_tunnel_info *ovs_tun; | |
1811 | ||
1812 | switch (nla_type(ovs_key)) { | |
1813 | case OVS_KEY_ATTR_TUNNEL_INFO: | |
1814 | ovs_tun = nla_data(ovs_key); | |
1815 | dst_release((struct dst_entry *)ovs_tun->tun_dst); | |
1816 | break; | |
1817 | } | |
1818 | } | |
1819 | ||
1820 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1821 | { | |
1822 | const struct nlattr *a; | |
1823 | int rem; | |
1824 | ||
1825 | if (!sf_acts) | |
1826 | return; | |
1827 | ||
1828 | nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { | |
1829 | switch (nla_type(a)) { | |
1830 | case OVS_ACTION_ATTR_SET: | |
1831 | ovs_nla_free_set_action(a); | |
1832 | break; | |
7f8a436e JS |
1833 | case OVS_ACTION_ATTR_CT: |
1834 | ovs_ct_free_action(a); | |
1835 | break; | |
34ae932a TG |
1836 | } |
1837 | } | |
1838 | ||
1839 | kfree(sf_acts); | |
1840 | } | |
1841 | ||
1842 | static void __ovs_nla_free_flow_actions(struct rcu_head *head) | |
1843 | { | |
1844 | ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); | |
1845 | } | |
1846 | ||
e6445719 PS |
1847 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1848 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
34ae932a | 1849 | void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) |
e6445719 | 1850 | { |
34ae932a | 1851 | call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); |
e6445719 PS |
1852 | } |
1853 | ||
1854 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
05da5898 | 1855 | int attr_len, bool log) |
e6445719 PS |
1856 | { |
1857 | ||
1858 | struct sw_flow_actions *acts; | |
1859 | int new_acts_size; | |
1860 | int req_size = NLA_ALIGN(attr_len); | |
1861 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1862 | (*sfa)->actions_len; | |
1863 | ||
1864 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1865 | goto out; | |
1866 | ||
1867 | new_acts_size = ksize(*sfa) * 2; | |
1868 | ||
1869 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1870 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1871 | return ERR_PTR(-EMSGSIZE); | |
1872 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1873 | } | |
1874 | ||
05da5898 | 1875 | acts = nla_alloc_flow_actions(new_acts_size, log); |
e6445719 PS |
1876 | if (IS_ERR(acts)) |
1877 | return (void *)acts; | |
1878 | ||
1879 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1880 | acts->actions_len = (*sfa)->actions_len; | |
8e2fed1c | 1881 | acts->orig_len = (*sfa)->orig_len; |
e6445719 PS |
1882 | kfree(*sfa); |
1883 | *sfa = acts; | |
1884 | ||
1885 | out: | |
1886 | (*sfa)->actions_len += req_size; | |
1887 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1888 | } | |
1889 | ||
f0b128c1 | 1890 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
05da5898 | 1891 | int attrtype, void *data, int len, bool log) |
e6445719 PS |
1892 | { |
1893 | struct nlattr *a; | |
1894 | ||
05da5898 | 1895 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
e6445719 | 1896 | if (IS_ERR(a)) |
f0b128c1 | 1897 | return a; |
e6445719 PS |
1898 | |
1899 | a->nla_type = attrtype; | |
1900 | a->nla_len = nla_attr_size(len); | |
1901 | ||
1902 | if (data) | |
1903 | memcpy(nla_data(a), data, len); | |
1904 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1905 | ||
f0b128c1 JG |
1906 | return a; |
1907 | } | |
1908 | ||
7f8a436e JS |
1909 | int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, |
1910 | int len, bool log) | |
f0b128c1 JG |
1911 | { |
1912 | struct nlattr *a; | |
1913 | ||
05da5898 | 1914 | a = __add_action(sfa, attrtype, data, len, log); |
f0b128c1 | 1915 | |
f35423c1 | 1916 | return PTR_ERR_OR_ZERO(a); |
e6445719 PS |
1917 | } |
1918 | ||
1919 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
05da5898 | 1920 | int attrtype, bool log) |
e6445719 PS |
1921 | { |
1922 | int used = (*sfa)->actions_len; | |
1923 | int err; | |
1924 | ||
7f8a436e | 1925 | err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); |
e6445719 PS |
1926 | if (err) |
1927 | return err; | |
1928 | ||
1929 | return used; | |
1930 | } | |
1931 | ||
1932 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1933 | int st_offset) | |
1934 | { | |
1935 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1936 | st_offset); | |
1937 | ||
1938 | a->nla_len = sfa->actions_len - st_offset; | |
1939 | } | |
1940 | ||
7f8a436e | 1941 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
1942 | const struct sw_flow_key *key, |
1943 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1944 | __be16 eth_type, __be16 vlan_tci, bool log); |
25cd9ba0 | 1945 | |
7f8a436e | 1946 | static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, |
e6445719 | 1947 | const struct sw_flow_key *key, int depth, |
25cd9ba0 | 1948 | struct sw_flow_actions **sfa, |
05da5898 | 1949 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1950 | { |
1951 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1952 | const struct nlattr *probability, *actions; | |
1953 | const struct nlattr *a; | |
1954 | int rem, start, err, st_acts; | |
1955 | ||
1956 | memset(attrs, 0, sizeof(attrs)); | |
1957 | nla_for_each_nested(a, attr, rem) { | |
1958 | int type = nla_type(a); | |
1959 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1960 | return -EINVAL; | |
1961 | attrs[type] = a; | |
1962 | } | |
1963 | if (rem) | |
1964 | return -EINVAL; | |
1965 | ||
1966 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1967 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1968 | return -EINVAL; | |
1969 | ||
1970 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1971 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1972 | return -EINVAL; | |
1973 | ||
1974 | /* validation done, copy sample action. */ | |
05da5898 | 1975 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
e6445719 PS |
1976 | if (start < 0) |
1977 | return start; | |
7f8a436e JS |
1978 | err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, |
1979 | nla_data(probability), sizeof(u32), log); | |
e6445719 PS |
1980 | if (err) |
1981 | return err; | |
05da5898 | 1982 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
e6445719 PS |
1983 | if (st_acts < 0) |
1984 | return st_acts; | |
1985 | ||
7f8a436e | 1986 | err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa, |
05da5898 | 1987 | eth_type, vlan_tci, log); |
e6445719 PS |
1988 | if (err) |
1989 | return err; | |
1990 | ||
1991 | add_nested_action_end(*sfa, st_acts); | |
1992 | add_nested_action_end(*sfa, start); | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
e6445719 PS |
1997 | void ovs_match_init(struct sw_flow_match *match, |
1998 | struct sw_flow_key *key, | |
1999 | struct sw_flow_mask *mask) | |
2000 | { | |
2001 | memset(match, 0, sizeof(*match)); | |
2002 | match->key = key; | |
2003 | match->mask = mask; | |
2004 | ||
2005 | memset(key, 0, sizeof(*key)); | |
2006 | ||
2007 | if (mask) { | |
2008 | memset(&mask->key, 0, sizeof(mask->key)); | |
2009 | mask->range.start = mask->range.end = 0; | |
2010 | } | |
2011 | } | |
2012 | ||
d91641d9 TG |
2013 | static int validate_geneve_opts(struct sw_flow_key *key) |
2014 | { | |
2015 | struct geneve_opt *option; | |
2016 | int opts_len = key->tun_opts_len; | |
2017 | bool crit_opt = false; | |
2018 | ||
2019 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
2020 | while (opts_len > 0) { | |
2021 | int len; | |
2022 | ||
2023 | if (opts_len < sizeof(*option)) | |
2024 | return -EINVAL; | |
2025 | ||
2026 | len = sizeof(*option) + option->length * 4; | |
2027 | if (len > opts_len) | |
2028 | return -EINVAL; | |
2029 | ||
2030 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
2031 | ||
2032 | option = (struct geneve_opt *)((u8 *)option + len); | |
2033 | opts_len -= len; | |
2034 | }; | |
2035 | ||
2036 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
2037 | ||
2038 | return 0; | |
2039 | } | |
2040 | ||
e6445719 | 2041 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
05da5898 | 2042 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
2043 | { |
2044 | struct sw_flow_match match; | |
2045 | struct sw_flow_key key; | |
34ae932a | 2046 | struct metadata_dst *tun_dst; |
1d8fff90 | 2047 | struct ip_tunnel_info *tun_info; |
34ae932a | 2048 | struct ovs_tunnel_info *ovs_tun; |
f0b128c1 | 2049 | struct nlattr *a; |
13101602 | 2050 | int err = 0, start, opts_type; |
e6445719 PS |
2051 | |
2052 | ovs_match_init(&match, &key, NULL); | |
6b26ba3a | 2053 | opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log); |
1dd144cf TG |
2054 | if (opts_type < 0) |
2055 | return opts_type; | |
e6445719 | 2056 | |
f5796684 | 2057 | if (key.tun_opts_len) { |
1dd144cf TG |
2058 | switch (opts_type) { |
2059 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
2060 | err = validate_geneve_opts(&key); | |
2061 | if (err < 0) | |
2062 | return err; | |
2063 | break; | |
2064 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
2065 | break; | |
2066 | } | |
f5796684 JG |
2067 | }; |
2068 | ||
05da5898 | 2069 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
e6445719 PS |
2070 | if (start < 0) |
2071 | return start; | |
2072 | ||
34ae932a TG |
2073 | tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL); |
2074 | if (!tun_dst) | |
2075 | return -ENOMEM; | |
2076 | ||
d71785ff PA |
2077 | err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL); |
2078 | if (err) { | |
2079 | dst_release((struct dst_entry *)tun_dst); | |
2080 | return err; | |
2081 | } | |
2082 | ||
f0b128c1 | 2083 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
34ae932a TG |
2084 | sizeof(*ovs_tun), log); |
2085 | if (IS_ERR(a)) { | |
2086 | dst_release((struct dst_entry *)tun_dst); | |
f0b128c1 | 2087 | return PTR_ERR(a); |
34ae932a TG |
2088 | } |
2089 | ||
2090 | ovs_tun = nla_data(a); | |
2091 | ovs_tun->tun_dst = tun_dst; | |
f0b128c1 | 2092 | |
34ae932a TG |
2093 | tun_info = &tun_dst->u.tun_info; |
2094 | tun_info->mode = IP_TUNNEL_INFO_TX; | |
00a93bab JB |
2095 | if (key.tun_proto == AF_INET6) |
2096 | tun_info->mode |= IP_TUNNEL_INFO_IPV6; | |
1d8fff90 | 2097 | tun_info->key = key.tun_key; |
f0b128c1 | 2098 | |
4c222798 PS |
2099 | /* We need to store the options in the action itself since |
2100 | * everything else will go away after flow setup. We can append | |
2101 | * it to tun_info and then point there. | |
2102 | */ | |
2103 | ip_tunnel_info_opts_set(tun_info, | |
2104 | TUN_METADATA_OPTS(&key, key.tun_opts_len), | |
2105 | key.tun_opts_len); | |
e6445719 PS |
2106 | add_nested_action_end(*sfa, start); |
2107 | ||
2108 | return err; | |
2109 | } | |
2110 | ||
83d2b9ba JR |
2111 | /* Return false if there are any non-masked bits set. |
2112 | * Mask follows data immediately, before any netlink padding. | |
2113 | */ | |
2114 | static bool validate_masked(u8 *data, int len) | |
2115 | { | |
2116 | u8 *mask = data + len; | |
2117 | ||
2118 | while (len--) | |
2119 | if (*data++ & ~*mask++) | |
2120 | return false; | |
2121 | ||
2122 | return true; | |
2123 | } | |
2124 | ||
e6445719 PS |
2125 | static int validate_set(const struct nlattr *a, |
2126 | const struct sw_flow_key *flow_key, | |
2127 | struct sw_flow_actions **sfa, | |
83d2b9ba | 2128 | bool *skip_copy, __be16 eth_type, bool masked, bool log) |
e6445719 PS |
2129 | { |
2130 | const struct nlattr *ovs_key = nla_data(a); | |
2131 | int key_type = nla_type(ovs_key); | |
83d2b9ba | 2132 | size_t key_len; |
e6445719 PS |
2133 | |
2134 | /* There can be only one key in a action */ | |
2135 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
2136 | return -EINVAL; | |
2137 | ||
83d2b9ba JR |
2138 | key_len = nla_len(ovs_key); |
2139 | if (masked) | |
2140 | key_len /= 2; | |
2141 | ||
e6445719 | 2142 | if (key_type > OVS_KEY_ATTR_MAX || |
982b5270 | 2143 | !check_attr_len(key_len, ovs_key_lens[key_type].len)) |
e6445719 PS |
2144 | return -EINVAL; |
2145 | ||
83d2b9ba JR |
2146 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) |
2147 | return -EINVAL; | |
2148 | ||
e6445719 PS |
2149 | switch (key_type) { |
2150 | const struct ovs_key_ipv4 *ipv4_key; | |
2151 | const struct ovs_key_ipv6 *ipv6_key; | |
2152 | int err; | |
2153 | ||
2154 | case OVS_KEY_ATTR_PRIORITY: | |
2155 | case OVS_KEY_ATTR_SKB_MARK: | |
182e3042 | 2156 | case OVS_KEY_ATTR_CT_MARK: |
33db4125 | 2157 | case OVS_KEY_ATTR_CT_LABELS: |
e6445719 PS |
2158 | case OVS_KEY_ATTR_ETHERNET: |
2159 | break; | |
2160 | ||
2161 | case OVS_KEY_ATTR_TUNNEL: | |
83d2b9ba JR |
2162 | if (masked) |
2163 | return -EINVAL; /* Masked tunnel set not supported. */ | |
2164 | ||
2165 | *skip_copy = true; | |
05da5898 | 2166 | err = validate_and_copy_set_tun(a, sfa, log); |
e6445719 PS |
2167 | if (err) |
2168 | return err; | |
2169 | break; | |
2170 | ||
2171 | case OVS_KEY_ATTR_IPV4: | |
25cd9ba0 | 2172 | if (eth_type != htons(ETH_P_IP)) |
e6445719 PS |
2173 | return -EINVAL; |
2174 | ||
e6445719 | 2175 | ipv4_key = nla_data(ovs_key); |
e6445719 | 2176 | |
83d2b9ba JR |
2177 | if (masked) { |
2178 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
e6445719 | 2179 | |
83d2b9ba JR |
2180 | /* Non-writeable fields. */ |
2181 | if (mask->ipv4_proto || mask->ipv4_frag) | |
2182 | return -EINVAL; | |
2183 | } else { | |
2184 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
2188 | return -EINVAL; | |
2189 | } | |
e6445719 PS |
2190 | break; |
2191 | ||
2192 | case OVS_KEY_ATTR_IPV6: | |
25cd9ba0 | 2193 | if (eth_type != htons(ETH_P_IPV6)) |
e6445719 PS |
2194 | return -EINVAL; |
2195 | ||
e6445719 | 2196 | ipv6_key = nla_data(ovs_key); |
e6445719 | 2197 | |
83d2b9ba JR |
2198 | if (masked) { |
2199 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
2200 | ||
2201 | /* Non-writeable fields. */ | |
2202 | if (mask->ipv6_proto || mask->ipv6_frag) | |
2203 | return -EINVAL; | |
2204 | ||
2205 | /* Invalid bits in the flow label mask? */ | |
2206 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
2207 | return -EINVAL; | |
2208 | } else { | |
2209 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
2210 | return -EINVAL; | |
e6445719 | 2211 | |
83d2b9ba JR |
2212 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) |
2213 | return -EINVAL; | |
2214 | } | |
e6445719 PS |
2215 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
2216 | return -EINVAL; | |
2217 | ||
2218 | break; | |
2219 | ||
2220 | case OVS_KEY_ATTR_TCP: | |
83d2b9ba JR |
2221 | if ((eth_type != htons(ETH_P_IP) && |
2222 | eth_type != htons(ETH_P_IPV6)) || | |
2223 | flow_key->ip.proto != IPPROTO_TCP) | |
e6445719 PS |
2224 | return -EINVAL; |
2225 | ||
83d2b9ba | 2226 | break; |
e6445719 PS |
2227 | |
2228 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
2229 | if ((eth_type != htons(ETH_P_IP) && |
2230 | eth_type != htons(ETH_P_IPV6)) || | |
2231 | flow_key->ip.proto != IPPROTO_UDP) | |
e6445719 PS |
2232 | return -EINVAL; |
2233 | ||
83d2b9ba | 2234 | break; |
25cd9ba0 SH |
2235 | |
2236 | case OVS_KEY_ATTR_MPLS: | |
2237 | if (!eth_p_mpls(eth_type)) | |
2238 | return -EINVAL; | |
2239 | break; | |
e6445719 PS |
2240 | |
2241 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
2242 | if ((eth_type != htons(ETH_P_IP) && |
2243 | eth_type != htons(ETH_P_IPV6)) || | |
2244 | flow_key->ip.proto != IPPROTO_SCTP) | |
e6445719 PS |
2245 | return -EINVAL; |
2246 | ||
83d2b9ba | 2247 | break; |
e6445719 PS |
2248 | |
2249 | default: | |
2250 | return -EINVAL; | |
2251 | } | |
2252 | ||
83d2b9ba JR |
2253 | /* Convert non-masked non-tunnel set actions to masked set actions. */ |
2254 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
2255 | int start, len = key_len * 2; | |
2256 | struct nlattr *at; | |
2257 | ||
2258 | *skip_copy = true; | |
2259 | ||
2260 | start = add_nested_action_start(sfa, | |
2261 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
2262 | log); | |
2263 | if (start < 0) | |
2264 | return start; | |
2265 | ||
2266 | at = __add_action(sfa, key_type, NULL, len, log); | |
2267 | if (IS_ERR(at)) | |
2268 | return PTR_ERR(at); | |
2269 | ||
2270 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
2271 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
2272 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
2273 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
2274 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
2275 | ||
2276 | mask->ipv6_label &= htonl(0x000FFFFF); | |
2277 | } | |
2278 | add_nested_action_end(*sfa, start); | |
2279 | } | |
2280 | ||
e6445719 PS |
2281 | return 0; |
2282 | } | |
2283 | ||
2284 | static int validate_userspace(const struct nlattr *attr) | |
2285 | { | |
2286 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
2287 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
2288 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8f0aad6f | 2289 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
e6445719 PS |
2290 | }; |
2291 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
2292 | int error; | |
2293 | ||
2294 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
2295 | attr, userspace_policy); | |
2296 | if (error) | |
2297 | return error; | |
2298 | ||
2299 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
2300 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
2301 | return -EINVAL; | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
2306 | static int copy_action(const struct nlattr *from, | |
05da5898 | 2307 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
2308 | { |
2309 | int totlen = NLA_ALIGN(from->nla_len); | |
2310 | struct nlattr *to; | |
2311 | ||
05da5898 | 2312 | to = reserve_sfa_size(sfa, from->nla_len, log); |
e6445719 PS |
2313 | if (IS_ERR(to)) |
2314 | return PTR_ERR(to); | |
2315 | ||
2316 | memcpy(to, from, totlen); | |
2317 | return 0; | |
2318 | } | |
2319 | ||
7f8a436e | 2320 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
2321 | const struct sw_flow_key *key, |
2322 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 2323 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
2324 | { |
2325 | const struct nlattr *a; | |
2326 | int rem, err; | |
2327 | ||
2328 | if (depth >= SAMPLE_ACTION_DEPTH) | |
2329 | return -EOVERFLOW; | |
2330 | ||
2331 | nla_for_each_nested(a, attr, rem) { | |
2332 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2333 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2334 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 2335 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 | 2336 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
25cd9ba0 SH |
2337 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
2338 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
e6445719 PS |
2339 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
2340 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2341 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
83d2b9ba | 2342 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, |
971427f3 | 2343 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
7f8a436e JS |
2344 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), |
2345 | [OVS_ACTION_ATTR_CT] = (u32)-1, | |
f2a4d086 | 2346 | [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc), |
e6445719 PS |
2347 | }; |
2348 | const struct ovs_action_push_vlan *vlan; | |
2349 | int type = nla_type(a); | |
2350 | bool skip_copy; | |
2351 | ||
2352 | if (type > OVS_ACTION_ATTR_MAX || | |
2353 | (action_lens[type] != nla_len(a) && | |
2354 | action_lens[type] != (u32)-1)) | |
2355 | return -EINVAL; | |
2356 | ||
2357 | skip_copy = false; | |
2358 | switch (type) { | |
2359 | case OVS_ACTION_ATTR_UNSPEC: | |
2360 | return -EINVAL; | |
2361 | ||
2362 | case OVS_ACTION_ATTR_USERSPACE: | |
2363 | err = validate_userspace(a); | |
2364 | if (err) | |
2365 | return err; | |
2366 | break; | |
2367 | ||
2368 | case OVS_ACTION_ATTR_OUTPUT: | |
2369 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2370 | return -EINVAL; | |
2371 | break; | |
2372 | ||
f2a4d086 WT |
2373 | case OVS_ACTION_ATTR_TRUNC: { |
2374 | const struct ovs_action_trunc *trunc = nla_data(a); | |
2375 | ||
2376 | if (trunc->max_len < ETH_HLEN) | |
2377 | return -EINVAL; | |
2378 | break; | |
2379 | } | |
2380 | ||
971427f3 AZ |
2381 | case OVS_ACTION_ATTR_HASH: { |
2382 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2383 | ||
2384 | switch (act_hash->hash_alg) { | |
2385 | case OVS_HASH_ALG_L4: | |
2386 | break; | |
2387 | default: | |
2388 | return -EINVAL; | |
2389 | } | |
2390 | ||
2391 | break; | |
2392 | } | |
e6445719 PS |
2393 | |
2394 | case OVS_ACTION_ATTR_POP_VLAN: | |
25cd9ba0 | 2395 | vlan_tci = htons(0); |
e6445719 PS |
2396 | break; |
2397 | ||
2398 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2399 | vlan = nla_data(a); | |
018c1dda | 2400 | if (!eth_type_vlan(vlan->vlan_tpid)) |
e6445719 PS |
2401 | return -EINVAL; |
2402 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2403 | return -EINVAL; | |
25cd9ba0 | 2404 | vlan_tci = vlan->vlan_tci; |
e6445719 PS |
2405 | break; |
2406 | ||
971427f3 AZ |
2407 | case OVS_ACTION_ATTR_RECIRC: |
2408 | break; | |
2409 | ||
25cd9ba0 SH |
2410 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
2411 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2412 | ||
25cd9ba0 SH |
2413 | if (!eth_p_mpls(mpls->mpls_ethertype)) |
2414 | return -EINVAL; | |
2415 | /* Prohibit push MPLS other than to a white list | |
2416 | * for packets that have a known tag order. | |
2417 | */ | |
2418 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2419 | (eth_type != htons(ETH_P_IP) && | |
2420 | eth_type != htons(ETH_P_IPV6) && | |
2421 | eth_type != htons(ETH_P_ARP) && | |
2422 | eth_type != htons(ETH_P_RARP) && | |
2423 | !eth_p_mpls(eth_type))) | |
2424 | return -EINVAL; | |
2425 | eth_type = mpls->mpls_ethertype; | |
2426 | break; | |
2427 | } | |
2428 | ||
2429 | case OVS_ACTION_ATTR_POP_MPLS: | |
2430 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2431 | !eth_p_mpls(eth_type)) | |
2432 | return -EINVAL; | |
2433 | ||
2434 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2435 | * as there is no check here to ensure that the new | |
2436 | * eth_type is valid and thus set actions could | |
2437 | * write off the end of the packet or otherwise | |
2438 | * corrupt it. | |
2439 | * | |
2440 | * Support for these actions is planned using packet | |
2441 | * recirculation. | |
2442 | */ | |
2443 | eth_type = htons(0); | |
2444 | break; | |
2445 | ||
e6445719 | 2446 | case OVS_ACTION_ATTR_SET: |
25cd9ba0 | 2447 | err = validate_set(a, key, sfa, |
83d2b9ba JR |
2448 | &skip_copy, eth_type, false, log); |
2449 | if (err) | |
2450 | return err; | |
2451 | break; | |
2452 | ||
2453 | case OVS_ACTION_ATTR_SET_MASKED: | |
2454 | err = validate_set(a, key, sfa, | |
2455 | &skip_copy, eth_type, true, log); | |
e6445719 PS |
2456 | if (err) |
2457 | return err; | |
2458 | break; | |
2459 | ||
2460 | case OVS_ACTION_ATTR_SAMPLE: | |
7f8a436e | 2461 | err = validate_and_copy_sample(net, a, key, depth, sfa, |
05da5898 | 2462 | eth_type, vlan_tci, log); |
e6445719 PS |
2463 | if (err) |
2464 | return err; | |
2465 | skip_copy = true; | |
2466 | break; | |
2467 | ||
7f8a436e JS |
2468 | case OVS_ACTION_ATTR_CT: |
2469 | err = ovs_ct_copy_action(net, a, key, sfa, log); | |
2470 | if (err) | |
2471 | return err; | |
2472 | skip_copy = true; | |
2473 | break; | |
2474 | ||
e6445719 | 2475 | default: |
05da5898 | 2476 | OVS_NLERR(log, "Unknown Action type %d", type); |
e6445719 PS |
2477 | return -EINVAL; |
2478 | } | |
2479 | if (!skip_copy) { | |
05da5898 | 2480 | err = copy_action(a, sfa, log); |
e6445719 PS |
2481 | if (err) |
2482 | return err; | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | if (rem > 0) | |
2487 | return -EINVAL; | |
2488 | ||
2489 | return 0; | |
2490 | } | |
2491 | ||
83d2b9ba | 2492 | /* 'key' must be the masked key. */ |
7f8a436e | 2493 | int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 | 2494 | const struct sw_flow_key *key, |
05da5898 | 2495 | struct sw_flow_actions **sfa, bool log) |
25cd9ba0 | 2496 | { |
2fdb957d PS |
2497 | int err; |
2498 | ||
05da5898 | 2499 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
2fdb957d PS |
2500 | if (IS_ERR(*sfa)) |
2501 | return PTR_ERR(*sfa); | |
2502 | ||
8e2fed1c | 2503 | (*sfa)->orig_len = nla_len(attr); |
7f8a436e | 2504 | err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type, |
018c1dda | 2505 | key->eth.vlan.tci, log); |
2fdb957d | 2506 | if (err) |
34ae932a | 2507 | ovs_nla_free_flow_actions(*sfa); |
2fdb957d PS |
2508 | |
2509 | return err; | |
25cd9ba0 SH |
2510 | } |
2511 | ||
e6445719 PS |
2512 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
2513 | { | |
2514 | const struct nlattr *a; | |
2515 | struct nlattr *start; | |
2516 | int err = 0, rem; | |
2517 | ||
2518 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
2519 | if (!start) | |
2520 | return -EMSGSIZE; | |
2521 | ||
2522 | nla_for_each_nested(a, attr, rem) { | |
2523 | int type = nla_type(a); | |
2524 | struct nlattr *st_sample; | |
2525 | ||
2526 | switch (type) { | |
2527 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
2528 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
2529 | sizeof(u32), nla_data(a))) | |
2530 | return -EMSGSIZE; | |
2531 | break; | |
2532 | case OVS_SAMPLE_ATTR_ACTIONS: | |
2533 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
2534 | if (!st_sample) | |
2535 | return -EMSGSIZE; | |
2536 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
2537 | if (err) | |
2538 | return err; | |
2539 | nla_nest_end(skb, st_sample); | |
2540 | break; | |
2541 | } | |
2542 | } | |
2543 | ||
2544 | nla_nest_end(skb, start); | |
2545 | return err; | |
2546 | } | |
2547 | ||
2548 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
2549 | { | |
2550 | const struct nlattr *ovs_key = nla_data(a); | |
2551 | int key_type = nla_type(ovs_key); | |
2552 | struct nlattr *start; | |
2553 | int err; | |
2554 | ||
2555 | switch (key_type) { | |
f0b128c1 | 2556 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
34ae932a TG |
2557 | struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); |
2558 | struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; | |
f0b128c1 | 2559 | |
e6445719 PS |
2560 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2561 | if (!start) | |
2562 | return -EMSGSIZE; | |
2563 | ||
e905eabc SH |
2564 | err = ip_tun_to_nlattr(skb, &tun_info->key, |
2565 | ip_tunnel_info_opts(tun_info), | |
2566 | tun_info->options_len, | |
2567 | ip_tunnel_info_af(tun_info)); | |
e6445719 PS |
2568 | if (err) |
2569 | return err; | |
2570 | nla_nest_end(skb, start); | |
2571 | break; | |
f0b128c1 | 2572 | } |
e6445719 PS |
2573 | default: |
2574 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
2575 | return -EMSGSIZE; | |
2576 | break; | |
2577 | } | |
2578 | ||
2579 | return 0; | |
2580 | } | |
2581 | ||
83d2b9ba JR |
2582 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, |
2583 | struct sk_buff *skb) | |
2584 | { | |
2585 | const struct nlattr *ovs_key = nla_data(a); | |
f4f8e738 | 2586 | struct nlattr *nla; |
83d2b9ba JR |
2587 | size_t key_len = nla_len(ovs_key) / 2; |
2588 | ||
2589 | /* Revert the conversion we did from a non-masked set action to | |
2590 | * masked set action. | |
2591 | */ | |
f4f8e738 JS |
2592 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2593 | if (!nla) | |
83d2b9ba JR |
2594 | return -EMSGSIZE; |
2595 | ||
f4f8e738 JS |
2596 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) |
2597 | return -EMSGSIZE; | |
2598 | ||
2599 | nla_nest_end(skb, nla); | |
83d2b9ba JR |
2600 | return 0; |
2601 | } | |
2602 | ||
e6445719 PS |
2603 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
2604 | { | |
2605 | const struct nlattr *a; | |
2606 | int rem, err; | |
2607 | ||
2608 | nla_for_each_attr(a, attr, len, rem) { | |
2609 | int type = nla_type(a); | |
2610 | ||
2611 | switch (type) { | |
2612 | case OVS_ACTION_ATTR_SET: | |
2613 | err = set_action_to_attr(a, skb); | |
2614 | if (err) | |
2615 | return err; | |
2616 | break; | |
2617 | ||
83d2b9ba JR |
2618 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
2619 | err = masked_set_action_to_set_action_attr(a, skb); | |
2620 | if (err) | |
2621 | return err; | |
2622 | break; | |
2623 | ||
e6445719 PS |
2624 | case OVS_ACTION_ATTR_SAMPLE: |
2625 | err = sample_action_to_attr(a, skb); | |
2626 | if (err) | |
2627 | return err; | |
2628 | break; | |
7f8a436e JS |
2629 | |
2630 | case OVS_ACTION_ATTR_CT: | |
2631 | err = ovs_ct_action_to_attr(nla_data(a), skb); | |
2632 | if (err) | |
2633 | return err; | |
2634 | break; | |
2635 | ||
e6445719 PS |
2636 | default: |
2637 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2638 | return -EMSGSIZE; | |
2639 | break; | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | return 0; | |
2644 | } |