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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 | ||
c2ac6673 JS |
811 | static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, |
812 | u64 *attrs, const struct nlattr **a, | |
813 | bool is_mask, bool log) | |
e6445719 | 814 | { |
971427f3 AZ |
815 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
816 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
817 | ||
818 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
819 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
820 | } | |
821 | ||
822 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
823 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
824 | ||
825 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
826 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
827 | } | |
828 | ||
e6445719 PS |
829 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
830 | SW_FLOW_KEY_PUT(match, phy.priority, | |
831 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
832 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
833 | } | |
834 | ||
835 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
836 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
837 | ||
426cda5c | 838 | if (is_mask) { |
e6445719 | 839 | in_port = 0xffffffff; /* Always exact match in_port. */ |
426cda5c | 840 | } else if (in_port >= DP_MAX_PORTS) { |
05da5898 | 841 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
426cda5c | 842 | in_port, DP_MAX_PORTS); |
e6445719 | 843 | return -EINVAL; |
426cda5c | 844 | } |
e6445719 PS |
845 | |
846 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
847 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
848 | } else if (!is_mask) { | |
849 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
850 | } | |
851 | ||
852 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
853 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
854 | ||
855 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
856 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
857 | } | |
858 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
6b26ba3a JB |
859 | if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, |
860 | is_mask, log) < 0) | |
e6445719 PS |
861 | return -EINVAL; |
862 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
863 | } | |
7f8a436e JS |
864 | |
865 | if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && | |
c2ac6673 | 866 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { |
fbccce59 | 867 | u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]); |
7f8a436e | 868 | |
9e384715 | 869 | if (ct_state & ~CT_SUPPORTED_MASK) { |
fbccce59 | 870 | OVS_NLERR(log, "ct_state flags %08x unsupported", |
6f225952 JS |
871 | ct_state); |
872 | return -EINVAL; | |
873 | } | |
7f8a436e JS |
874 | |
875 | SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask); | |
876 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); | |
877 | } | |
878 | if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && | |
c2ac6673 | 879 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) { |
7f8a436e JS |
880 | u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); |
881 | ||
882 | SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask); | |
883 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); | |
884 | } | |
182e3042 | 885 | if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) && |
c2ac6673 | 886 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) { |
182e3042 JS |
887 | u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]); |
888 | ||
889 | SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask); | |
890 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK); | |
891 | } | |
33db4125 JS |
892 | if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) && |
893 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) { | |
894 | const struct ovs_key_ct_labels *cl; | |
c2ac6673 | 895 | |
33db4125 JS |
896 | cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]); |
897 | SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels, | |
c2ac6673 | 898 | sizeof(*cl), is_mask); |
33db4125 | 899 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS); |
c2ac6673 | 900 | } |
e6445719 PS |
901 | return 0; |
902 | } | |
903 | ||
c2ac6673 JS |
904 | static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match, |
905 | u64 attrs, const struct nlattr **a, | |
906 | bool is_mask, bool log) | |
e6445719 PS |
907 | { |
908 | int err; | |
e6445719 | 909 | |
c2ac6673 | 910 | err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log); |
e6445719 PS |
911 | if (err) |
912 | return err; | |
913 | ||
914 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
915 | const struct ovs_key_ethernet *eth_key; | |
916 | ||
917 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
918 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
919 | eth_key->eth_src, ETH_ALEN, is_mask); | |
920 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
921 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
922 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
923 | } | |
924 | ||
925 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
926 | __be16 tci; | |
927 | ||
928 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
929 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
930 | if (is_mask) | |
05da5898 | 931 | OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit."); |
e6445719 | 932 | else |
05da5898 | 933 | OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set."); |
e6445719 PS |
934 | |
935 | return -EINVAL; | |
936 | } | |
937 | ||
938 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
939 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
a85311bf | 940 | } |
e6445719 PS |
941 | |
942 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
943 | __be16 eth_type; | |
944 | ||
945 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
946 | if (is_mask) { | |
947 | /* Always exact match EtherType. */ | |
948 | eth_type = htons(0xffff); | |
6713fc9b | 949 | } else if (!eth_proto_is_802_3(eth_type)) { |
05da5898 JR |
950 | OVS_NLERR(log, "EtherType %x is less than min %x", |
951 | ntohs(eth_type), ETH_P_802_3_MIN); | |
e6445719 PS |
952 | return -EINVAL; |
953 | } | |
954 | ||
955 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
956 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
957 | } else if (!is_mask) { | |
958 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
959 | } | |
960 | ||
961 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
962 | const struct ovs_key_ipv4 *ipv4_key; | |
963 | ||
964 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
965 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
966 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
967 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
968 | return -EINVAL; |
969 | } | |
970 | SW_FLOW_KEY_PUT(match, ip.proto, | |
971 | ipv4_key->ipv4_proto, is_mask); | |
972 | SW_FLOW_KEY_PUT(match, ip.tos, | |
973 | ipv4_key->ipv4_tos, is_mask); | |
974 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
975 | ipv4_key->ipv4_ttl, is_mask); | |
976 | SW_FLOW_KEY_PUT(match, ip.frag, | |
977 | ipv4_key->ipv4_frag, is_mask); | |
978 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
979 | ipv4_key->ipv4_src, is_mask); | |
980 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
981 | ipv4_key->ipv4_dst, is_mask); | |
982 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
983 | } | |
984 | ||
985 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
986 | const struct ovs_key_ipv6 *ipv6_key; | |
987 | ||
988 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
989 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
990 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
991 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
992 | return -EINVAL; |
993 | } | |
fecaef85 | 994 | |
d3052bb5 | 995 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { |
14591433 | 996 | OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n", |
fecaef85 JR |
997 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); |
998 | return -EINVAL; | |
999 | } | |
1000 | ||
e6445719 PS |
1001 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1002 | ipv6_key->ipv6_label, is_mask); | |
1003 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1004 | ipv6_key->ipv6_proto, is_mask); | |
1005 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1006 | ipv6_key->ipv6_tclass, is_mask); | |
1007 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1008 | ipv6_key->ipv6_hlimit, is_mask); | |
1009 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1010 | ipv6_key->ipv6_frag, is_mask); | |
1011 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1012 | ipv6_key->ipv6_src, | |
1013 | sizeof(match->key->ipv6.addr.src), | |
1014 | is_mask); | |
1015 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1016 | ipv6_key->ipv6_dst, | |
1017 | sizeof(match->key->ipv6.addr.dst), | |
1018 | is_mask); | |
1019 | ||
1020 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
1021 | } | |
1022 | ||
1023 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
1024 | const struct ovs_key_arp *arp_key; | |
1025 | ||
1026 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1027 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
05da5898 | 1028 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
e6445719 PS |
1029 | arp_key->arp_op); |
1030 | return -EINVAL; | |
1031 | } | |
1032 | ||
1033 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1034 | arp_key->arp_sip, is_mask); | |
1035 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1036 | arp_key->arp_tip, is_mask); | |
1037 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1038 | ntohs(arp_key->arp_op), is_mask); | |
1039 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1040 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1041 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1042 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1043 | ||
1044 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
1045 | } | |
1046 | ||
25cd9ba0 SH |
1047 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { |
1048 | const struct ovs_key_mpls *mpls_key; | |
1049 | ||
1050 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
1051 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
1052 | mpls_key->mpls_lse, is_mask); | |
1053 | ||
1054 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
1055 | } | |
1056 | ||
e6445719 PS |
1057 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
1058 | const struct ovs_key_tcp *tcp_key; | |
1059 | ||
1060 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
1061 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
1062 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
1063 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
1064 | } | |
1065 | ||
5eb26b15 | 1066 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
1b760fb9 JS |
1067 | SW_FLOW_KEY_PUT(match, tp.flags, |
1068 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
1069 | is_mask); | |
5eb26b15 JR |
1070 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
1071 | } | |
1072 | ||
e6445719 PS |
1073 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
1074 | const struct ovs_key_udp *udp_key; | |
1075 | ||
1076 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
1077 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
1078 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
1079 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
1080 | } | |
1081 | ||
1082 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
1083 | const struct ovs_key_sctp *sctp_key; | |
1084 | ||
1085 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
1086 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
1087 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
1088 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
1089 | } | |
1090 | ||
1091 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
1092 | const struct ovs_key_icmp *icmp_key; | |
1093 | ||
1094 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 1095 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1096 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 1097 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1098 | htons(icmp_key->icmp_code), is_mask); |
1099 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
1100 | } | |
1101 | ||
1102 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
1103 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1104 | ||
1105 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 1106 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1107 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 1108 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1109 | htons(icmpv6_key->icmpv6_code), is_mask); |
1110 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
1111 | } | |
1112 | ||
1113 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
1114 | const struct ovs_key_nd *nd_key; | |
1115 | ||
1116 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1117 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1118 | nd_key->nd_target, | |
1119 | sizeof(match->key->ipv6.nd.target), | |
1120 | is_mask); | |
1121 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1122 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1123 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1124 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1125 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
1126 | } | |
1127 | ||
426cda5c | 1128 | if (attrs != 0) { |
05da5898 | 1129 | OVS_NLERR(log, "Unknown key attributes %llx", |
426cda5c | 1130 | (unsigned long long)attrs); |
e6445719 | 1131 | return -EINVAL; |
426cda5c | 1132 | } |
e6445719 PS |
1133 | |
1134 | return 0; | |
1135 | } | |
1136 | ||
81bfe3c3 TG |
1137 | static void nlattr_set(struct nlattr *attr, u8 val, |
1138 | const struct ovs_len_tbl *tbl) | |
e6445719 | 1139 | { |
f47de068 PS |
1140 | struct nlattr *nla; |
1141 | int rem; | |
e6445719 | 1142 | |
f47de068 PS |
1143 | /* The nlattr stream should already have been validated */ |
1144 | nla_for_each_nested(nla, attr, rem) { | |
982b5270 JG |
1145 | if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) { |
1146 | if (tbl[nla_type(nla)].next) | |
1147 | tbl = tbl[nla_type(nla)].next; | |
1148 | nlattr_set(nla, val, tbl); | |
1149 | } else { | |
f47de068 | 1150 | memset(nla_data(nla), val, nla_len(nla)); |
982b5270 | 1151 | } |
9e384715 JS |
1152 | |
1153 | if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE) | |
1154 | *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK; | |
f47de068 PS |
1155 | } |
1156 | } | |
1157 | ||
1158 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1159 | { | |
81bfe3c3 | 1160 | nlattr_set(attr, val, ovs_key_lens); |
e6445719 PS |
1161 | } |
1162 | ||
1163 | /** | |
1164 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1165 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1166 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1167 | * does not include any don't care bit. | |
c2ac6673 | 1168 | * @net: Used to determine per-namespace field support. |
e6445719 PS |
1169 | * @match: receives the extracted flow match information. |
1170 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1171 | * sequence. The fields should of the packet that triggered the creation | |
1172 | * of this flow. | |
1173 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1174 | * attribute specifies the mask field of the wildcarded flow. | |
05da5898 JR |
1175 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1176 | * probing for feature compatibility this should be passed in as false to | |
1177 | * suppress unnecessary error logging. | |
e6445719 | 1178 | */ |
c2ac6673 | 1179 | int ovs_nla_get_match(struct net *net, struct sw_flow_match *match, |
a85311bf | 1180 | const struct nlattr *nla_key, |
05da5898 JR |
1181 | const struct nlattr *nla_mask, |
1182 | bool log) | |
e6445719 PS |
1183 | { |
1184 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1185 | const struct nlattr *encap; | |
f47de068 | 1186 | struct nlattr *newmask = NULL; |
e6445719 PS |
1187 | u64 key_attrs = 0; |
1188 | u64 mask_attrs = 0; | |
1189 | bool encap_valid = false; | |
1190 | int err; | |
1191 | ||
05da5898 | 1192 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
e6445719 PS |
1193 | if (err) |
1194 | return err; | |
1195 | ||
1196 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
1197 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
1198 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1199 | __be16 tci; | |
1200 | ||
1201 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
1202 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
05da5898 | 1203 | OVS_NLERR(log, "Invalid Vlan frame."); |
e6445719 PS |
1204 | return -EINVAL; |
1205 | } | |
1206 | ||
1207 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1208 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1209 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1210 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1211 | encap_valid = true; | |
1212 | ||
1213 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
05da5898 | 1214 | err = parse_flow_nlattrs(encap, a, &key_attrs, log); |
e6445719 PS |
1215 | if (err) |
1216 | return err; | |
1217 | } else if (!tci) { | |
1218 | /* Corner case for truncated 802.1Q header. */ | |
1219 | if (nla_len(encap)) { | |
05da5898 | 1220 | OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute."); |
e6445719 PS |
1221 | return -EINVAL; |
1222 | } | |
1223 | } else { | |
05da5898 | 1224 | OVS_NLERR(log, "Encap attr is set for non-VLAN frame"); |
e6445719 PS |
1225 | return -EINVAL; |
1226 | } | |
1227 | } | |
1228 | ||
c2ac6673 | 1229 | err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log); |
e6445719 PS |
1230 | if (err) |
1231 | return err; | |
1232 | ||
a85311bf PS |
1233 | if (match->mask) { |
1234 | if (!nla_mask) { | |
1235 | /* Create an exact match mask. We need to set to 0xff | |
1236 | * all the 'match->mask' fields that have been touched | |
1237 | * in 'match->key'. We cannot simply memset | |
1238 | * 'match->mask', because padding bytes and fields not | |
1239 | * specified in 'match->key' should be left to 0. | |
1240 | * Instead, we use a stream of netlink attributes, | |
1241 | * copied from 'key' and set to 0xff. | |
1242 | * ovs_key_from_nlattrs() will take care of filling | |
1243 | * 'match->mask' appropriately. | |
1244 | */ | |
1245 | newmask = kmemdup(nla_key, | |
1246 | nla_total_size(nla_len(nla_key)), | |
1247 | GFP_KERNEL); | |
1248 | if (!newmask) | |
1249 | return -ENOMEM; | |
f47de068 | 1250 | |
a85311bf | 1251 | mask_set_nlattr(newmask, 0xff); |
f47de068 | 1252 | |
a85311bf PS |
1253 | /* The userspace does not send tunnel attributes that |
1254 | * are 0, but we should not wildcard them nonetheless. | |
1255 | */ | |
00a93bab | 1256 | if (match->key->tun_proto) |
a85311bf PS |
1257 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, |
1258 | 0xff, true); | |
f47de068 | 1259 | |
a85311bf PS |
1260 | nla_mask = newmask; |
1261 | } | |
f47de068 | 1262 | |
05da5898 | 1263 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
e6445719 | 1264 | if (err) |
f47de068 | 1265 | goto free_newmask; |
e6445719 | 1266 | |
a85311bf PS |
1267 | /* Always match on tci. */ |
1268 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
1269 | ||
f47de068 | 1270 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { |
e6445719 PS |
1271 | __be16 eth_type = 0; |
1272 | __be16 tci = 0; | |
1273 | ||
1274 | if (!encap_valid) { | |
05da5898 | 1275 | OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame."); |
f47de068 PS |
1276 | err = -EINVAL; |
1277 | goto free_newmask; | |
e6445719 PS |
1278 | } |
1279 | ||
1280 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1281 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1282 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1283 | ||
1284 | if (eth_type == htons(0xffff)) { | |
1285 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1286 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
05da5898 JR |
1287 | err = parse_flow_mask_nlattrs(encap, a, |
1288 | &mask_attrs, log); | |
f47de068 PS |
1289 | if (err) |
1290 | goto free_newmask; | |
e6445719 | 1291 | } else { |
05da5898 JR |
1292 | OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).", |
1293 | ntohs(eth_type)); | |
f47de068 PS |
1294 | err = -EINVAL; |
1295 | goto free_newmask; | |
e6445719 PS |
1296 | } |
1297 | ||
1298 | if (a[OVS_KEY_ATTR_VLAN]) | |
1299 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1300 | ||
1301 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
05da5898 JR |
1302 | OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).", |
1303 | ntohs(tci)); | |
f47de068 PS |
1304 | err = -EINVAL; |
1305 | goto free_newmask; | |
e6445719 PS |
1306 | } |
1307 | } | |
1308 | ||
c2ac6673 JS |
1309 | err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true, |
1310 | log); | |
e6445719 | 1311 | if (err) |
f47de068 | 1312 | goto free_newmask; |
e6445719 PS |
1313 | } |
1314 | ||
05da5898 | 1315 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
f47de068 | 1316 | err = -EINVAL; |
e6445719 | 1317 | |
f47de068 PS |
1318 | free_newmask: |
1319 | kfree(newmask); | |
1320 | return err; | |
e6445719 PS |
1321 | } |
1322 | ||
74ed7ab9 JS |
1323 | static size_t get_ufid_len(const struct nlattr *attr, bool log) |
1324 | { | |
1325 | size_t len; | |
1326 | ||
1327 | if (!attr) | |
1328 | return 0; | |
1329 | ||
1330 | len = nla_len(attr); | |
1331 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1332 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1333 | nla_len(attr), MAX_UFID_LENGTH); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | return len; | |
1338 | } | |
1339 | ||
1340 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1341 | * or false otherwise. | |
1342 | */ | |
1343 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1344 | bool log) | |
1345 | { | |
1346 | sfid->ufid_len = get_ufid_len(attr, log); | |
1347 | if (sfid->ufid_len) | |
1348 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1349 | ||
1350 | return sfid->ufid_len; | |
1351 | } | |
1352 | ||
1353 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1354 | const struct sw_flow_key *key, bool log) | |
1355 | { | |
1356 | struct sw_flow_key *new_key; | |
1357 | ||
1358 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1359 | return 0; | |
1360 | ||
1361 | /* If UFID was not provided, use unmasked key. */ | |
1362 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1363 | if (!new_key) | |
1364 | return -ENOMEM; | |
1365 | memcpy(new_key, key, sizeof(*key)); | |
1366 | sfid->unmasked_key = new_key; | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1372 | { | |
1373 | return attr ? nla_get_u32(attr) : 0; | |
1374 | } | |
1375 | ||
e6445719 PS |
1376 | /** |
1377 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 1378 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
1379 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1380 | * sequence. | |
05da5898 JR |
1381 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1382 | * probing for feature compatibility this should be passed in as false to | |
1383 | * suppress unnecessary error logging. | |
e6445719 PS |
1384 | * |
1385 | * This parses a series of Netlink attributes that form a flow key, which must | |
1386 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1387 | * get the metadata, that is, the parts of the flow key that cannot be | |
1388 | * extracted from the packet itself. | |
1389 | */ | |
1390 | ||
c2ac6673 | 1391 | int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr, |
05da5898 JR |
1392 | struct sw_flow_key *key, |
1393 | bool log) | |
e6445719 | 1394 | { |
e6445719 | 1395 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 1396 | struct sw_flow_match match; |
e6445719 PS |
1397 | u64 attrs = 0; |
1398 | int err; | |
e6445719 | 1399 | |
05da5898 | 1400 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
e6445719 PS |
1401 | if (err) |
1402 | return -EINVAL; | |
1403 | ||
1404 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 1405 | match.key = key; |
e6445719 | 1406 | |
7f8a436e | 1407 | memset(&key->ct, 0, sizeof(key->ct)); |
83c8df26 | 1408 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 1409 | |
c2ac6673 | 1410 | return metadata_from_nlattrs(net, &match, &attrs, a, false, log); |
e6445719 PS |
1411 | } |
1412 | ||
5b4237bb JS |
1413 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, |
1414 | const struct sw_flow_key *output, bool is_mask, | |
1415 | struct sk_buff *skb) | |
e6445719 PS |
1416 | { |
1417 | struct ovs_key_ethernet *eth_key; | |
1418 | struct nlattr *nla, *encap; | |
e6445719 | 1419 | |
971427f3 AZ |
1420 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
1421 | goto nla_put_failure; | |
1422 | ||
1423 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1424 | goto nla_put_failure; | |
1425 | ||
e6445719 PS |
1426 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1427 | goto nla_put_failure; | |
1428 | ||
00a93bab | 1429 | if ((swkey->tun_proto || is_mask)) { |
d91641d9 | 1430 | const void *opts = NULL; |
f5796684 JG |
1431 | |
1432 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
d91641d9 | 1433 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); |
f5796684 | 1434 | |
6b26ba3a JB |
1435 | if (ip_tun_to_nlattr(skb, &output->tun_key, opts, |
1436 | swkey->tun_opts_len, swkey->tun_proto)) | |
f5796684 JG |
1437 | goto nla_put_failure; |
1438 | } | |
e6445719 PS |
1439 | |
1440 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1441 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1442 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1443 | goto nla_put_failure; | |
1444 | } else { | |
1445 | u16 upper_u16; | |
1446 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1447 | ||
1448 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1449 | (upper_u16 << 16) | output->phy.in_port)) | |
1450 | goto nla_put_failure; | |
1451 | } | |
1452 | ||
1453 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1454 | goto nla_put_failure; | |
1455 | ||
7f8a436e JS |
1456 | if (ovs_ct_put_key(output, skb)) |
1457 | goto nla_put_failure; | |
1458 | ||
e6445719 PS |
1459 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1460 | if (!nla) | |
1461 | goto nla_put_failure; | |
1462 | ||
1463 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1464 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1465 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 PS |
1466 | |
1467 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1468 | __be16 eth_type; | |
1469 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1470 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1471 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1472 | goto nla_put_failure; | |
1473 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1474 | if (!swkey->eth.tci) | |
1475 | goto unencap; | |
1476 | } else | |
1477 | encap = NULL; | |
1478 | ||
1479 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1480 | /* | |
1481 | * Ethertype 802.2 is represented in the netlink with omitted | |
1482 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1483 | * 0xffff in the mask attribute. Ethertype can also | |
1484 | * be wildcarded. | |
1485 | */ | |
1486 | if (is_mask && output->eth.type) | |
1487 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1488 | output->eth.type)) | |
1489 | goto nla_put_failure; | |
1490 | goto unencap; | |
1491 | } | |
1492 | ||
1493 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1494 | goto nla_put_failure; | |
1495 | ||
1496 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1497 | struct ovs_key_ipv4 *ipv4_key; | |
1498 | ||
1499 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1500 | if (!nla) | |
1501 | goto nla_put_failure; | |
1502 | ipv4_key = nla_data(nla); | |
1503 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1504 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1505 | ipv4_key->ipv4_proto = output->ip.proto; | |
1506 | ipv4_key->ipv4_tos = output->ip.tos; | |
1507 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1508 | ipv4_key->ipv4_frag = output->ip.frag; | |
1509 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1510 | struct ovs_key_ipv6 *ipv6_key; | |
1511 | ||
1512 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1513 | if (!nla) | |
1514 | goto nla_put_failure; | |
1515 | ipv6_key = nla_data(nla); | |
1516 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1517 | sizeof(ipv6_key->ipv6_src)); | |
1518 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1519 | sizeof(ipv6_key->ipv6_dst)); | |
1520 | ipv6_key->ipv6_label = output->ipv6.label; | |
1521 | ipv6_key->ipv6_proto = output->ip.proto; | |
1522 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1523 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1524 | ipv6_key->ipv6_frag = output->ip.frag; | |
1525 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1526 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1527 | struct ovs_key_arp *arp_key; | |
1528 | ||
1529 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1530 | if (!nla) | |
1531 | goto nla_put_failure; | |
1532 | arp_key = nla_data(nla); | |
1533 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1534 | arp_key->arp_sip = output->ipv4.addr.src; | |
1535 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1536 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1537 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1538 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
25cd9ba0 SH |
1539 | } else if (eth_p_mpls(swkey->eth.type)) { |
1540 | struct ovs_key_mpls *mpls_key; | |
1541 | ||
1542 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1543 | if (!nla) | |
1544 | goto nla_put_failure; | |
1545 | mpls_key = nla_data(nla); | |
1546 | mpls_key->mpls_lse = output->mpls.top_lse; | |
e6445719 PS |
1547 | } |
1548 | ||
1549 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1550 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1551 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1552 | ||
1553 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1554 | struct ovs_key_tcp *tcp_key; | |
1555 | ||
1556 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1557 | if (!nla) | |
1558 | goto nla_put_failure; | |
1559 | tcp_key = nla_data(nla); | |
1139e241 JR |
1560 | tcp_key->tcp_src = output->tp.src; |
1561 | tcp_key->tcp_dst = output->tp.dst; | |
1562 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1563 | output->tp.flags)) | |
1564 | goto nla_put_failure; | |
e6445719 PS |
1565 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1566 | struct ovs_key_udp *udp_key; | |
1567 | ||
1568 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1569 | if (!nla) | |
1570 | goto nla_put_failure; | |
1571 | udp_key = nla_data(nla); | |
1139e241 JR |
1572 | udp_key->udp_src = output->tp.src; |
1573 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1574 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1575 | struct ovs_key_sctp *sctp_key; | |
1576 | ||
1577 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1578 | if (!nla) | |
1579 | goto nla_put_failure; | |
1580 | sctp_key = nla_data(nla); | |
1139e241 JR |
1581 | sctp_key->sctp_src = output->tp.src; |
1582 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1583 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1584 | swkey->ip.proto == IPPROTO_ICMP) { | |
1585 | struct ovs_key_icmp *icmp_key; | |
1586 | ||
1587 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1588 | if (!nla) | |
1589 | goto nla_put_failure; | |
1590 | icmp_key = nla_data(nla); | |
1139e241 JR |
1591 | icmp_key->icmp_type = ntohs(output->tp.src); |
1592 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1593 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1594 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1595 | struct ovs_key_icmpv6 *icmpv6_key; | |
1596 | ||
1597 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1598 | sizeof(*icmpv6_key)); | |
1599 | if (!nla) | |
1600 | goto nla_put_failure; | |
1601 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1602 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1603 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1604 | |
1605 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1606 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1607 | struct ovs_key_nd *nd_key; | |
1608 | ||
1609 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1610 | if (!nla) | |
1611 | goto nla_put_failure; | |
1612 | nd_key = nla_data(nla); | |
1613 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1614 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1615 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1616 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1617 | } |
1618 | } | |
1619 | } | |
1620 | ||
1621 | unencap: | |
1622 | if (encap) | |
1623 | nla_nest_end(skb, encap); | |
1624 | ||
1625 | return 0; | |
1626 | ||
1627 | nla_put_failure: | |
1628 | return -EMSGSIZE; | |
1629 | } | |
1630 | ||
5b4237bb JS |
1631 | int ovs_nla_put_key(const struct sw_flow_key *swkey, |
1632 | const struct sw_flow_key *output, int attr, bool is_mask, | |
1633 | struct sk_buff *skb) | |
1634 | { | |
1635 | int err; | |
1636 | struct nlattr *nla; | |
1637 | ||
1638 | nla = nla_nest_start(skb, attr); | |
1639 | if (!nla) | |
1640 | return -EMSGSIZE; | |
1641 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
1642 | if (err) | |
1643 | return err; | |
1644 | nla_nest_end(skb, nla); | |
1645 | ||
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | /* Called with ovs_mutex or RCU read lock. */ | |
74ed7ab9 JS |
1650 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) |
1651 | { | |
1652 | if (ovs_identifier_is_ufid(&flow->id)) | |
1653 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
1654 | flow->id.ufid); | |
1655 | ||
1656 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
1657 | OVS_FLOW_ATTR_KEY, false, skb); | |
1658 | } | |
1659 | ||
1660 | /* Called with ovs_mutex or RCU read lock. */ | |
1661 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
5b4237bb | 1662 | { |
26ad0b83 | 1663 | return ovs_nla_put_key(&flow->key, &flow->key, |
5b4237bb JS |
1664 | OVS_FLOW_ATTR_KEY, false, skb); |
1665 | } | |
1666 | ||
1667 | /* Called with ovs_mutex or RCU read lock. */ | |
1668 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
1669 | { | |
1670 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
1671 | OVS_FLOW_ATTR_MASK, true, skb); | |
1672 | } | |
1673 | ||
e6445719 PS |
1674 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
1675 | ||
05da5898 | 1676 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
e6445719 PS |
1677 | { |
1678 | struct sw_flow_actions *sfa; | |
1679 | ||
426cda5c | 1680 | if (size > MAX_ACTIONS_BUFSIZE) { |
05da5898 | 1681 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
e6445719 | 1682 | return ERR_PTR(-EINVAL); |
426cda5c | 1683 | } |
e6445719 PS |
1684 | |
1685 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1686 | if (!sfa) | |
1687 | return ERR_PTR(-ENOMEM); | |
1688 | ||
1689 | sfa->actions_len = 0; | |
1690 | return sfa; | |
1691 | } | |
1692 | ||
34ae932a TG |
1693 | static void ovs_nla_free_set_action(const struct nlattr *a) |
1694 | { | |
1695 | const struct nlattr *ovs_key = nla_data(a); | |
1696 | struct ovs_tunnel_info *ovs_tun; | |
1697 | ||
1698 | switch (nla_type(ovs_key)) { | |
1699 | case OVS_KEY_ATTR_TUNNEL_INFO: | |
1700 | ovs_tun = nla_data(ovs_key); | |
1701 | dst_release((struct dst_entry *)ovs_tun->tun_dst); | |
1702 | break; | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1707 | { | |
1708 | const struct nlattr *a; | |
1709 | int rem; | |
1710 | ||
1711 | if (!sf_acts) | |
1712 | return; | |
1713 | ||
1714 | nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { | |
1715 | switch (nla_type(a)) { | |
1716 | case OVS_ACTION_ATTR_SET: | |
1717 | ovs_nla_free_set_action(a); | |
1718 | break; | |
7f8a436e JS |
1719 | case OVS_ACTION_ATTR_CT: |
1720 | ovs_ct_free_action(a); | |
1721 | break; | |
34ae932a TG |
1722 | } |
1723 | } | |
1724 | ||
1725 | kfree(sf_acts); | |
1726 | } | |
1727 | ||
1728 | static void __ovs_nla_free_flow_actions(struct rcu_head *head) | |
1729 | { | |
1730 | ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); | |
1731 | } | |
1732 | ||
e6445719 PS |
1733 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1734 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
34ae932a | 1735 | void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) |
e6445719 | 1736 | { |
34ae932a | 1737 | call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); |
e6445719 PS |
1738 | } |
1739 | ||
1740 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
05da5898 | 1741 | int attr_len, bool log) |
e6445719 PS |
1742 | { |
1743 | ||
1744 | struct sw_flow_actions *acts; | |
1745 | int new_acts_size; | |
1746 | int req_size = NLA_ALIGN(attr_len); | |
1747 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1748 | (*sfa)->actions_len; | |
1749 | ||
1750 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1751 | goto out; | |
1752 | ||
1753 | new_acts_size = ksize(*sfa) * 2; | |
1754 | ||
1755 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1756 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1757 | return ERR_PTR(-EMSGSIZE); | |
1758 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1759 | } | |
1760 | ||
05da5898 | 1761 | acts = nla_alloc_flow_actions(new_acts_size, log); |
e6445719 PS |
1762 | if (IS_ERR(acts)) |
1763 | return (void *)acts; | |
1764 | ||
1765 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1766 | acts->actions_len = (*sfa)->actions_len; | |
8e2fed1c | 1767 | acts->orig_len = (*sfa)->orig_len; |
e6445719 PS |
1768 | kfree(*sfa); |
1769 | *sfa = acts; | |
1770 | ||
1771 | out: | |
1772 | (*sfa)->actions_len += req_size; | |
1773 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1774 | } | |
1775 | ||
f0b128c1 | 1776 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
05da5898 | 1777 | int attrtype, void *data, int len, bool log) |
e6445719 PS |
1778 | { |
1779 | struct nlattr *a; | |
1780 | ||
05da5898 | 1781 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
e6445719 | 1782 | if (IS_ERR(a)) |
f0b128c1 | 1783 | return a; |
e6445719 PS |
1784 | |
1785 | a->nla_type = attrtype; | |
1786 | a->nla_len = nla_attr_size(len); | |
1787 | ||
1788 | if (data) | |
1789 | memcpy(nla_data(a), data, len); | |
1790 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1791 | ||
f0b128c1 JG |
1792 | return a; |
1793 | } | |
1794 | ||
7f8a436e JS |
1795 | int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, |
1796 | int len, bool log) | |
f0b128c1 JG |
1797 | { |
1798 | struct nlattr *a; | |
1799 | ||
05da5898 | 1800 | a = __add_action(sfa, attrtype, data, len, log); |
f0b128c1 | 1801 | |
f35423c1 | 1802 | return PTR_ERR_OR_ZERO(a); |
e6445719 PS |
1803 | } |
1804 | ||
1805 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
05da5898 | 1806 | int attrtype, bool log) |
e6445719 PS |
1807 | { |
1808 | int used = (*sfa)->actions_len; | |
1809 | int err; | |
1810 | ||
7f8a436e | 1811 | err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); |
e6445719 PS |
1812 | if (err) |
1813 | return err; | |
1814 | ||
1815 | return used; | |
1816 | } | |
1817 | ||
1818 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1819 | int st_offset) | |
1820 | { | |
1821 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1822 | st_offset); | |
1823 | ||
1824 | a->nla_len = sfa->actions_len - st_offset; | |
1825 | } | |
1826 | ||
7f8a436e | 1827 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
1828 | const struct sw_flow_key *key, |
1829 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1830 | __be16 eth_type, __be16 vlan_tci, bool log); |
25cd9ba0 | 1831 | |
7f8a436e | 1832 | static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, |
e6445719 | 1833 | const struct sw_flow_key *key, int depth, |
25cd9ba0 | 1834 | struct sw_flow_actions **sfa, |
05da5898 | 1835 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1836 | { |
1837 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1838 | const struct nlattr *probability, *actions; | |
1839 | const struct nlattr *a; | |
1840 | int rem, start, err, st_acts; | |
1841 | ||
1842 | memset(attrs, 0, sizeof(attrs)); | |
1843 | nla_for_each_nested(a, attr, rem) { | |
1844 | int type = nla_type(a); | |
1845 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1846 | return -EINVAL; | |
1847 | attrs[type] = a; | |
1848 | } | |
1849 | if (rem) | |
1850 | return -EINVAL; | |
1851 | ||
1852 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1853 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1854 | return -EINVAL; | |
1855 | ||
1856 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1857 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1858 | return -EINVAL; | |
1859 | ||
1860 | /* validation done, copy sample action. */ | |
05da5898 | 1861 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
e6445719 PS |
1862 | if (start < 0) |
1863 | return start; | |
7f8a436e JS |
1864 | err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, |
1865 | nla_data(probability), sizeof(u32), log); | |
e6445719 PS |
1866 | if (err) |
1867 | return err; | |
05da5898 | 1868 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
e6445719 PS |
1869 | if (st_acts < 0) |
1870 | return st_acts; | |
1871 | ||
7f8a436e | 1872 | err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa, |
05da5898 | 1873 | eth_type, vlan_tci, log); |
e6445719 PS |
1874 | if (err) |
1875 | return err; | |
1876 | ||
1877 | add_nested_action_end(*sfa, st_acts); | |
1878 | add_nested_action_end(*sfa, start); | |
1879 | ||
1880 | return 0; | |
1881 | } | |
1882 | ||
e6445719 PS |
1883 | void ovs_match_init(struct sw_flow_match *match, |
1884 | struct sw_flow_key *key, | |
1885 | struct sw_flow_mask *mask) | |
1886 | { | |
1887 | memset(match, 0, sizeof(*match)); | |
1888 | match->key = key; | |
1889 | match->mask = mask; | |
1890 | ||
1891 | memset(key, 0, sizeof(*key)); | |
1892 | ||
1893 | if (mask) { | |
1894 | memset(&mask->key, 0, sizeof(mask->key)); | |
1895 | mask->range.start = mask->range.end = 0; | |
1896 | } | |
1897 | } | |
1898 | ||
d91641d9 TG |
1899 | static int validate_geneve_opts(struct sw_flow_key *key) |
1900 | { | |
1901 | struct geneve_opt *option; | |
1902 | int opts_len = key->tun_opts_len; | |
1903 | bool crit_opt = false; | |
1904 | ||
1905 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
1906 | while (opts_len > 0) { | |
1907 | int len; | |
1908 | ||
1909 | if (opts_len < sizeof(*option)) | |
1910 | return -EINVAL; | |
1911 | ||
1912 | len = sizeof(*option) + option->length * 4; | |
1913 | if (len > opts_len) | |
1914 | return -EINVAL; | |
1915 | ||
1916 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1917 | ||
1918 | option = (struct geneve_opt *)((u8 *)option + len); | |
1919 | opts_len -= len; | |
1920 | }; | |
1921 | ||
1922 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1923 | ||
1924 | return 0; | |
1925 | } | |
1926 | ||
e6445719 | 1927 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
05da5898 | 1928 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1929 | { |
1930 | struct sw_flow_match match; | |
1931 | struct sw_flow_key key; | |
34ae932a | 1932 | struct metadata_dst *tun_dst; |
1d8fff90 | 1933 | struct ip_tunnel_info *tun_info; |
34ae932a | 1934 | struct ovs_tunnel_info *ovs_tun; |
f0b128c1 | 1935 | struct nlattr *a; |
13101602 | 1936 | int err = 0, start, opts_type; |
e6445719 PS |
1937 | |
1938 | ovs_match_init(&match, &key, NULL); | |
6b26ba3a | 1939 | opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log); |
1dd144cf TG |
1940 | if (opts_type < 0) |
1941 | return opts_type; | |
e6445719 | 1942 | |
f5796684 | 1943 | if (key.tun_opts_len) { |
1dd144cf TG |
1944 | switch (opts_type) { |
1945 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
1946 | err = validate_geneve_opts(&key); | |
1947 | if (err < 0) | |
1948 | return err; | |
1949 | break; | |
1950 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
1951 | break; | |
1952 | } | |
f5796684 JG |
1953 | }; |
1954 | ||
05da5898 | 1955 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
e6445719 PS |
1956 | if (start < 0) |
1957 | return start; | |
1958 | ||
34ae932a TG |
1959 | tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL); |
1960 | if (!tun_dst) | |
1961 | return -ENOMEM; | |
1962 | ||
d71785ff PA |
1963 | err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL); |
1964 | if (err) { | |
1965 | dst_release((struct dst_entry *)tun_dst); | |
1966 | return err; | |
1967 | } | |
1968 | ||
f0b128c1 | 1969 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
34ae932a TG |
1970 | sizeof(*ovs_tun), log); |
1971 | if (IS_ERR(a)) { | |
1972 | dst_release((struct dst_entry *)tun_dst); | |
f0b128c1 | 1973 | return PTR_ERR(a); |
34ae932a TG |
1974 | } |
1975 | ||
1976 | ovs_tun = nla_data(a); | |
1977 | ovs_tun->tun_dst = tun_dst; | |
f0b128c1 | 1978 | |
34ae932a TG |
1979 | tun_info = &tun_dst->u.tun_info; |
1980 | tun_info->mode = IP_TUNNEL_INFO_TX; | |
00a93bab JB |
1981 | if (key.tun_proto == AF_INET6) |
1982 | tun_info->mode |= IP_TUNNEL_INFO_IPV6; | |
1d8fff90 | 1983 | tun_info->key = key.tun_key; |
f0b128c1 | 1984 | |
4c222798 PS |
1985 | /* We need to store the options in the action itself since |
1986 | * everything else will go away after flow setup. We can append | |
1987 | * it to tun_info and then point there. | |
1988 | */ | |
1989 | ip_tunnel_info_opts_set(tun_info, | |
1990 | TUN_METADATA_OPTS(&key, key.tun_opts_len), | |
1991 | key.tun_opts_len); | |
e6445719 PS |
1992 | add_nested_action_end(*sfa, start); |
1993 | ||
1994 | return err; | |
1995 | } | |
1996 | ||
83d2b9ba JR |
1997 | /* Return false if there are any non-masked bits set. |
1998 | * Mask follows data immediately, before any netlink padding. | |
1999 | */ | |
2000 | static bool validate_masked(u8 *data, int len) | |
2001 | { | |
2002 | u8 *mask = data + len; | |
2003 | ||
2004 | while (len--) | |
2005 | if (*data++ & ~*mask++) | |
2006 | return false; | |
2007 | ||
2008 | return true; | |
2009 | } | |
2010 | ||
e6445719 PS |
2011 | static int validate_set(const struct nlattr *a, |
2012 | const struct sw_flow_key *flow_key, | |
2013 | struct sw_flow_actions **sfa, | |
83d2b9ba | 2014 | bool *skip_copy, __be16 eth_type, bool masked, bool log) |
e6445719 PS |
2015 | { |
2016 | const struct nlattr *ovs_key = nla_data(a); | |
2017 | int key_type = nla_type(ovs_key); | |
83d2b9ba | 2018 | size_t key_len; |
e6445719 PS |
2019 | |
2020 | /* There can be only one key in a action */ | |
2021 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
2022 | return -EINVAL; | |
2023 | ||
83d2b9ba JR |
2024 | key_len = nla_len(ovs_key); |
2025 | if (masked) | |
2026 | key_len /= 2; | |
2027 | ||
e6445719 | 2028 | if (key_type > OVS_KEY_ATTR_MAX || |
982b5270 | 2029 | !check_attr_len(key_len, ovs_key_lens[key_type].len)) |
e6445719 PS |
2030 | return -EINVAL; |
2031 | ||
83d2b9ba JR |
2032 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) |
2033 | return -EINVAL; | |
2034 | ||
e6445719 PS |
2035 | switch (key_type) { |
2036 | const struct ovs_key_ipv4 *ipv4_key; | |
2037 | const struct ovs_key_ipv6 *ipv6_key; | |
2038 | int err; | |
2039 | ||
2040 | case OVS_KEY_ATTR_PRIORITY: | |
2041 | case OVS_KEY_ATTR_SKB_MARK: | |
182e3042 | 2042 | case OVS_KEY_ATTR_CT_MARK: |
33db4125 | 2043 | case OVS_KEY_ATTR_CT_LABELS: |
e6445719 PS |
2044 | case OVS_KEY_ATTR_ETHERNET: |
2045 | break; | |
2046 | ||
2047 | case OVS_KEY_ATTR_TUNNEL: | |
83d2b9ba JR |
2048 | if (masked) |
2049 | return -EINVAL; /* Masked tunnel set not supported. */ | |
2050 | ||
2051 | *skip_copy = true; | |
05da5898 | 2052 | err = validate_and_copy_set_tun(a, sfa, log); |
e6445719 PS |
2053 | if (err) |
2054 | return err; | |
2055 | break; | |
2056 | ||
2057 | case OVS_KEY_ATTR_IPV4: | |
25cd9ba0 | 2058 | if (eth_type != htons(ETH_P_IP)) |
e6445719 PS |
2059 | return -EINVAL; |
2060 | ||
e6445719 | 2061 | ipv4_key = nla_data(ovs_key); |
e6445719 | 2062 | |
83d2b9ba JR |
2063 | if (masked) { |
2064 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
e6445719 | 2065 | |
83d2b9ba JR |
2066 | /* Non-writeable fields. */ |
2067 | if (mask->ipv4_proto || mask->ipv4_frag) | |
2068 | return -EINVAL; | |
2069 | } else { | |
2070 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
2071 | return -EINVAL; | |
2072 | ||
2073 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
2074 | return -EINVAL; | |
2075 | } | |
e6445719 PS |
2076 | break; |
2077 | ||
2078 | case OVS_KEY_ATTR_IPV6: | |
25cd9ba0 | 2079 | if (eth_type != htons(ETH_P_IPV6)) |
e6445719 PS |
2080 | return -EINVAL; |
2081 | ||
e6445719 | 2082 | ipv6_key = nla_data(ovs_key); |
e6445719 | 2083 | |
83d2b9ba JR |
2084 | if (masked) { |
2085 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
2086 | ||
2087 | /* Non-writeable fields. */ | |
2088 | if (mask->ipv6_proto || mask->ipv6_frag) | |
2089 | return -EINVAL; | |
2090 | ||
2091 | /* Invalid bits in the flow label mask? */ | |
2092 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
2093 | return -EINVAL; | |
2094 | } else { | |
2095 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
2096 | return -EINVAL; | |
e6445719 | 2097 | |
83d2b9ba JR |
2098 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) |
2099 | return -EINVAL; | |
2100 | } | |
e6445719 PS |
2101 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
2102 | return -EINVAL; | |
2103 | ||
2104 | break; | |
2105 | ||
2106 | case OVS_KEY_ATTR_TCP: | |
83d2b9ba JR |
2107 | if ((eth_type != htons(ETH_P_IP) && |
2108 | eth_type != htons(ETH_P_IPV6)) || | |
2109 | flow_key->ip.proto != IPPROTO_TCP) | |
e6445719 PS |
2110 | return -EINVAL; |
2111 | ||
83d2b9ba | 2112 | break; |
e6445719 PS |
2113 | |
2114 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
2115 | if ((eth_type != htons(ETH_P_IP) && |
2116 | eth_type != htons(ETH_P_IPV6)) || | |
2117 | flow_key->ip.proto != IPPROTO_UDP) | |
e6445719 PS |
2118 | return -EINVAL; |
2119 | ||
83d2b9ba | 2120 | break; |
25cd9ba0 SH |
2121 | |
2122 | case OVS_KEY_ATTR_MPLS: | |
2123 | if (!eth_p_mpls(eth_type)) | |
2124 | return -EINVAL; | |
2125 | break; | |
e6445719 PS |
2126 | |
2127 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
2128 | if ((eth_type != htons(ETH_P_IP) && |
2129 | eth_type != htons(ETH_P_IPV6)) || | |
2130 | flow_key->ip.proto != IPPROTO_SCTP) | |
e6445719 PS |
2131 | return -EINVAL; |
2132 | ||
83d2b9ba | 2133 | break; |
e6445719 PS |
2134 | |
2135 | default: | |
2136 | return -EINVAL; | |
2137 | } | |
2138 | ||
83d2b9ba JR |
2139 | /* Convert non-masked non-tunnel set actions to masked set actions. */ |
2140 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
2141 | int start, len = key_len * 2; | |
2142 | struct nlattr *at; | |
2143 | ||
2144 | *skip_copy = true; | |
2145 | ||
2146 | start = add_nested_action_start(sfa, | |
2147 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
2148 | log); | |
2149 | if (start < 0) | |
2150 | return start; | |
2151 | ||
2152 | at = __add_action(sfa, key_type, NULL, len, log); | |
2153 | if (IS_ERR(at)) | |
2154 | return PTR_ERR(at); | |
2155 | ||
2156 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
2157 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
2158 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
2159 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
2160 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
2161 | ||
2162 | mask->ipv6_label &= htonl(0x000FFFFF); | |
2163 | } | |
2164 | add_nested_action_end(*sfa, start); | |
2165 | } | |
2166 | ||
e6445719 PS |
2167 | return 0; |
2168 | } | |
2169 | ||
2170 | static int validate_userspace(const struct nlattr *attr) | |
2171 | { | |
2172 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
2173 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
2174 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8f0aad6f | 2175 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
e6445719 PS |
2176 | }; |
2177 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
2178 | int error; | |
2179 | ||
2180 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
2181 | attr, userspace_policy); | |
2182 | if (error) | |
2183 | return error; | |
2184 | ||
2185 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
2186 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
2187 | return -EINVAL; | |
2188 | ||
2189 | return 0; | |
2190 | } | |
2191 | ||
2192 | static int copy_action(const struct nlattr *from, | |
05da5898 | 2193 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
2194 | { |
2195 | int totlen = NLA_ALIGN(from->nla_len); | |
2196 | struct nlattr *to; | |
2197 | ||
05da5898 | 2198 | to = reserve_sfa_size(sfa, from->nla_len, log); |
e6445719 PS |
2199 | if (IS_ERR(to)) |
2200 | return PTR_ERR(to); | |
2201 | ||
2202 | memcpy(to, from, totlen); | |
2203 | return 0; | |
2204 | } | |
2205 | ||
7f8a436e | 2206 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
2207 | const struct sw_flow_key *key, |
2208 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 2209 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
2210 | { |
2211 | const struct nlattr *a; | |
2212 | int rem, err; | |
2213 | ||
2214 | if (depth >= SAMPLE_ACTION_DEPTH) | |
2215 | return -EOVERFLOW; | |
2216 | ||
2217 | nla_for_each_nested(a, attr, rem) { | |
2218 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2219 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2220 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 2221 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 | 2222 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
25cd9ba0 SH |
2223 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
2224 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
e6445719 PS |
2225 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
2226 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2227 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
83d2b9ba | 2228 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, |
971427f3 | 2229 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
7f8a436e JS |
2230 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), |
2231 | [OVS_ACTION_ATTR_CT] = (u32)-1, | |
f2a4d086 | 2232 | [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc), |
e6445719 PS |
2233 | }; |
2234 | const struct ovs_action_push_vlan *vlan; | |
2235 | int type = nla_type(a); | |
2236 | bool skip_copy; | |
2237 | ||
2238 | if (type > OVS_ACTION_ATTR_MAX || | |
2239 | (action_lens[type] != nla_len(a) && | |
2240 | action_lens[type] != (u32)-1)) | |
2241 | return -EINVAL; | |
2242 | ||
2243 | skip_copy = false; | |
2244 | switch (type) { | |
2245 | case OVS_ACTION_ATTR_UNSPEC: | |
2246 | return -EINVAL; | |
2247 | ||
2248 | case OVS_ACTION_ATTR_USERSPACE: | |
2249 | err = validate_userspace(a); | |
2250 | if (err) | |
2251 | return err; | |
2252 | break; | |
2253 | ||
2254 | case OVS_ACTION_ATTR_OUTPUT: | |
2255 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2256 | return -EINVAL; | |
2257 | break; | |
2258 | ||
f2a4d086 WT |
2259 | case OVS_ACTION_ATTR_TRUNC: { |
2260 | const struct ovs_action_trunc *trunc = nla_data(a); | |
2261 | ||
2262 | if (trunc->max_len < ETH_HLEN) | |
2263 | return -EINVAL; | |
2264 | break; | |
2265 | } | |
2266 | ||
971427f3 AZ |
2267 | case OVS_ACTION_ATTR_HASH: { |
2268 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2269 | ||
2270 | switch (act_hash->hash_alg) { | |
2271 | case OVS_HASH_ALG_L4: | |
2272 | break; | |
2273 | default: | |
2274 | return -EINVAL; | |
2275 | } | |
2276 | ||
2277 | break; | |
2278 | } | |
e6445719 PS |
2279 | |
2280 | case OVS_ACTION_ATTR_POP_VLAN: | |
25cd9ba0 | 2281 | vlan_tci = htons(0); |
e6445719 PS |
2282 | break; |
2283 | ||
2284 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2285 | vlan = nla_data(a); | |
2286 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
2287 | return -EINVAL; | |
2288 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2289 | return -EINVAL; | |
25cd9ba0 | 2290 | vlan_tci = vlan->vlan_tci; |
e6445719 PS |
2291 | break; |
2292 | ||
971427f3 AZ |
2293 | case OVS_ACTION_ATTR_RECIRC: |
2294 | break; | |
2295 | ||
25cd9ba0 SH |
2296 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
2297 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2298 | ||
25cd9ba0 SH |
2299 | if (!eth_p_mpls(mpls->mpls_ethertype)) |
2300 | return -EINVAL; | |
2301 | /* Prohibit push MPLS other than to a white list | |
2302 | * for packets that have a known tag order. | |
2303 | */ | |
2304 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2305 | (eth_type != htons(ETH_P_IP) && | |
2306 | eth_type != htons(ETH_P_IPV6) && | |
2307 | eth_type != htons(ETH_P_ARP) && | |
2308 | eth_type != htons(ETH_P_RARP) && | |
2309 | !eth_p_mpls(eth_type))) | |
2310 | return -EINVAL; | |
2311 | eth_type = mpls->mpls_ethertype; | |
2312 | break; | |
2313 | } | |
2314 | ||
2315 | case OVS_ACTION_ATTR_POP_MPLS: | |
2316 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2317 | !eth_p_mpls(eth_type)) | |
2318 | return -EINVAL; | |
2319 | ||
2320 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2321 | * as there is no check here to ensure that the new | |
2322 | * eth_type is valid and thus set actions could | |
2323 | * write off the end of the packet or otherwise | |
2324 | * corrupt it. | |
2325 | * | |
2326 | * Support for these actions is planned using packet | |
2327 | * recirculation. | |
2328 | */ | |
2329 | eth_type = htons(0); | |
2330 | break; | |
2331 | ||
e6445719 | 2332 | case OVS_ACTION_ATTR_SET: |
25cd9ba0 | 2333 | err = validate_set(a, key, sfa, |
83d2b9ba JR |
2334 | &skip_copy, eth_type, false, log); |
2335 | if (err) | |
2336 | return err; | |
2337 | break; | |
2338 | ||
2339 | case OVS_ACTION_ATTR_SET_MASKED: | |
2340 | err = validate_set(a, key, sfa, | |
2341 | &skip_copy, eth_type, true, log); | |
e6445719 PS |
2342 | if (err) |
2343 | return err; | |
2344 | break; | |
2345 | ||
2346 | case OVS_ACTION_ATTR_SAMPLE: | |
7f8a436e | 2347 | err = validate_and_copy_sample(net, a, key, depth, sfa, |
05da5898 | 2348 | eth_type, vlan_tci, log); |
e6445719 PS |
2349 | if (err) |
2350 | return err; | |
2351 | skip_copy = true; | |
2352 | break; | |
2353 | ||
7f8a436e JS |
2354 | case OVS_ACTION_ATTR_CT: |
2355 | err = ovs_ct_copy_action(net, a, key, sfa, log); | |
2356 | if (err) | |
2357 | return err; | |
2358 | skip_copy = true; | |
2359 | break; | |
2360 | ||
e6445719 | 2361 | default: |
05da5898 | 2362 | OVS_NLERR(log, "Unknown Action type %d", type); |
e6445719 PS |
2363 | return -EINVAL; |
2364 | } | |
2365 | if (!skip_copy) { | |
05da5898 | 2366 | err = copy_action(a, sfa, log); |
e6445719 PS |
2367 | if (err) |
2368 | return err; | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | if (rem > 0) | |
2373 | return -EINVAL; | |
2374 | ||
2375 | return 0; | |
2376 | } | |
2377 | ||
83d2b9ba | 2378 | /* 'key' must be the masked key. */ |
7f8a436e | 2379 | int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 | 2380 | const struct sw_flow_key *key, |
05da5898 | 2381 | struct sw_flow_actions **sfa, bool log) |
25cd9ba0 | 2382 | { |
2fdb957d PS |
2383 | int err; |
2384 | ||
05da5898 | 2385 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
2fdb957d PS |
2386 | if (IS_ERR(*sfa)) |
2387 | return PTR_ERR(*sfa); | |
2388 | ||
8e2fed1c | 2389 | (*sfa)->orig_len = nla_len(attr); |
7f8a436e | 2390 | err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type, |
05da5898 | 2391 | key->eth.tci, log); |
2fdb957d | 2392 | if (err) |
34ae932a | 2393 | ovs_nla_free_flow_actions(*sfa); |
2fdb957d PS |
2394 | |
2395 | return err; | |
25cd9ba0 SH |
2396 | } |
2397 | ||
e6445719 PS |
2398 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
2399 | { | |
2400 | const struct nlattr *a; | |
2401 | struct nlattr *start; | |
2402 | int err = 0, rem; | |
2403 | ||
2404 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
2405 | if (!start) | |
2406 | return -EMSGSIZE; | |
2407 | ||
2408 | nla_for_each_nested(a, attr, rem) { | |
2409 | int type = nla_type(a); | |
2410 | struct nlattr *st_sample; | |
2411 | ||
2412 | switch (type) { | |
2413 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
2414 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
2415 | sizeof(u32), nla_data(a))) | |
2416 | return -EMSGSIZE; | |
2417 | break; | |
2418 | case OVS_SAMPLE_ATTR_ACTIONS: | |
2419 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
2420 | if (!st_sample) | |
2421 | return -EMSGSIZE; | |
2422 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
2423 | if (err) | |
2424 | return err; | |
2425 | nla_nest_end(skb, st_sample); | |
2426 | break; | |
2427 | } | |
2428 | } | |
2429 | ||
2430 | nla_nest_end(skb, start); | |
2431 | return err; | |
2432 | } | |
2433 | ||
2434 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
2435 | { | |
2436 | const struct nlattr *ovs_key = nla_data(a); | |
2437 | int key_type = nla_type(ovs_key); | |
2438 | struct nlattr *start; | |
2439 | int err; | |
2440 | ||
2441 | switch (key_type) { | |
f0b128c1 | 2442 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
34ae932a TG |
2443 | struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); |
2444 | struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; | |
f0b128c1 | 2445 | |
e6445719 PS |
2446 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2447 | if (!start) | |
2448 | return -EMSGSIZE; | |
2449 | ||
e905eabc SH |
2450 | err = ip_tun_to_nlattr(skb, &tun_info->key, |
2451 | ip_tunnel_info_opts(tun_info), | |
2452 | tun_info->options_len, | |
2453 | ip_tunnel_info_af(tun_info)); | |
e6445719 PS |
2454 | if (err) |
2455 | return err; | |
2456 | nla_nest_end(skb, start); | |
2457 | break; | |
f0b128c1 | 2458 | } |
e6445719 PS |
2459 | default: |
2460 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
2461 | return -EMSGSIZE; | |
2462 | break; | |
2463 | } | |
2464 | ||
2465 | return 0; | |
2466 | } | |
2467 | ||
83d2b9ba JR |
2468 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, |
2469 | struct sk_buff *skb) | |
2470 | { | |
2471 | const struct nlattr *ovs_key = nla_data(a); | |
f4f8e738 | 2472 | struct nlattr *nla; |
83d2b9ba JR |
2473 | size_t key_len = nla_len(ovs_key) / 2; |
2474 | ||
2475 | /* Revert the conversion we did from a non-masked set action to | |
2476 | * masked set action. | |
2477 | */ | |
f4f8e738 JS |
2478 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2479 | if (!nla) | |
83d2b9ba JR |
2480 | return -EMSGSIZE; |
2481 | ||
f4f8e738 JS |
2482 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) |
2483 | return -EMSGSIZE; | |
2484 | ||
2485 | nla_nest_end(skb, nla); | |
83d2b9ba JR |
2486 | return 0; |
2487 | } | |
2488 | ||
e6445719 PS |
2489 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
2490 | { | |
2491 | const struct nlattr *a; | |
2492 | int rem, err; | |
2493 | ||
2494 | nla_for_each_attr(a, attr, len, rem) { | |
2495 | int type = nla_type(a); | |
2496 | ||
2497 | switch (type) { | |
2498 | case OVS_ACTION_ATTR_SET: | |
2499 | err = set_action_to_attr(a, skb); | |
2500 | if (err) | |
2501 | return err; | |
2502 | break; | |
2503 | ||
83d2b9ba JR |
2504 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
2505 | err = masked_set_action_to_set_action_attr(a, skb); | |
2506 | if (err) | |
2507 | return err; | |
2508 | break; | |
2509 | ||
e6445719 PS |
2510 | case OVS_ACTION_ATTR_SAMPLE: |
2511 | err = sample_action_to_attr(a, skb); | |
2512 | if (err) | |
2513 | return err; | |
2514 | break; | |
7f8a436e JS |
2515 | |
2516 | case OVS_ACTION_ATTR_CT: | |
2517 | err = ovs_ct_action_to_attr(nla_data(a), skb); | |
2518 | if (err) | |
2519 | return err; | |
2520 | break; | |
2521 | ||
e6445719 PS |
2522 | default: |
2523 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2524 | return -EMSGSIZE; | |
2525 | break; | |
2526 | } | |
2527 | } | |
2528 | ||
2529 | return 0; | |
2530 | } |