]>
Commit | Line | Data |
---|---|---|
a097c0b2 | 1 | /* |
e23775f2 | 2 | * Copyright (c) 2007-2015 Nicira, Inc. |
a097c0b2 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 | ||
0a0857df JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
a097c0b2 PS |
21 | #include <linux/uaccess.h> |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/if_vlan.h> | |
26 | #include <net/llc_pdu.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/jhash.h> | |
29 | #include <linux/jiffies.h> | |
30 | #include <linux/llc.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/in.h> | |
33 | #include <linux/rcupdate.h> | |
34 | #include <linux/if_arp.h> | |
35 | #include <linux/ip.h> | |
36 | #include <linux/ipv6.h> | |
37 | #include <linux/sctp.h> | |
38 | #include <linux/tcp.h> | |
39 | #include <linux/udp.h> | |
40 | #include <linux/icmp.h> | |
41 | #include <linux/icmpv6.h> | |
42 | #include <linux/rculist.h> | |
c1fc1411 | 43 | #include <net/geneve.h> |
a097c0b2 PS |
44 | #include <net/ip.h> |
45 | #include <net/ipv6.h> | |
46 | #include <net/ndisc.h> | |
2baf0e0c | 47 | #include <net/mpls.h> |
e23775f2 | 48 | #include <net/vxlan.h> |
a097c0b2 | 49 | |
2baf0e0c | 50 | #include "datapath.h" |
a94ebc39 | 51 | #include "conntrack.h" |
2baf0e0c | 52 | #include "flow.h" |
a097c0b2 | 53 | #include "flow_netlink.h" |
e23775f2 | 54 | #include "gso.h" |
a097c0b2 | 55 | |
ec959cdc TG |
56 | struct ovs_len_tbl { |
57 | int len; | |
58 | const struct ovs_len_tbl *next; | |
59 | }; | |
60 | ||
61 | #define OVS_ATTR_NESTED -1 | |
6da061f4 | 62 | #define OVS_ATTR_VARIABLE -2 |
ec959cdc | 63 | |
f3ccd17d PS |
64 | static void update_range(struct sw_flow_match *match, |
65 | size_t offset, size_t size, bool is_mask) | |
a097c0b2 | 66 | { |
f3ccd17d | 67 | struct sw_flow_key_range *range; |
a097c0b2 PS |
68 | size_t start = rounddown(offset, sizeof(long)); |
69 | size_t end = roundup(offset + size, sizeof(long)); | |
70 | ||
71 | if (!is_mask) | |
72 | range = &match->range; | |
f3ccd17d | 73 | else |
a097c0b2 PS |
74 | range = &match->mask->range; |
75 | ||
a097c0b2 PS |
76 | if (range->start == range->end) { |
77 | range->start = start; | |
78 | range->end = end; | |
79 | return; | |
80 | } | |
81 | ||
82 | if (range->start > start) | |
83 | range->start = start; | |
84 | ||
85 | if (range->end < end) | |
86 | range->end = end; | |
87 | } | |
88 | ||
89 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
90 | do { \ | |
f3ccd17d PS |
91 | update_range(match, offsetof(struct sw_flow_key, field), \ |
92 | sizeof((match)->key->field), is_mask); \ | |
93 | if (is_mask) \ | |
94 | (match)->mask->key.field = value; \ | |
95 | else \ | |
a097c0b2 | 96 | (match)->key->field = value; \ |
a097c0b2 PS |
97 | } while (0) |
98 | ||
f3ccd17d PS |
99 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
100 | do { \ | |
101 | update_range(match, offset, len, is_mask); \ | |
102 | if (is_mask) \ | |
103 | memcpy((u8 *)&(match)->mask->key + offset, value_p, len);\ | |
104 | else \ | |
105 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
a097c0b2 PS |
106 | } while (0) |
107 | ||
f3ccd17d | 108 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
c1fc1411 JG |
109 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ |
110 | value_p, len, is_mask) | |
111 | ||
f3ccd17d PS |
112 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ |
113 | do { \ | |
114 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
115 | sizeof((match)->key->field), is_mask); \ | |
116 | if (is_mask) \ | |
117 | memset((u8 *)&(match)->mask->key.field, value, \ | |
118 | sizeof((match)->mask->key.field)); \ | |
119 | else \ | |
0b496cda DDP |
120 | memset((u8 *)&(match)->key->field, value, \ |
121 | sizeof((match)->key->field)); \ | |
0b496cda DDP |
122 | } while (0) |
123 | ||
a097c0b2 | 124 | static bool match_validate(const struct sw_flow_match *match, |
9233cef7 | 125 | u64 key_attrs, u64 mask_attrs, bool log) |
a097c0b2 PS |
126 | { |
127 | u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET; | |
128 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
129 | ||
130 | /* The following mask attributes allowed only if they | |
af465b67 PS |
131 | * pass the validation tests. |
132 | */ | |
a097c0b2 PS |
133 | mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4) |
134 | | (1ULL << OVS_KEY_ATTR_IPV6) | |
135 | | (1ULL << OVS_KEY_ATTR_TCP) | |
dc235f7f | 136 | | (1ULL << OVS_KEY_ATTR_TCP_FLAGS) |
a097c0b2 PS |
137 | | (1ULL << OVS_KEY_ATTR_UDP) |
138 | | (1ULL << OVS_KEY_ATTR_SCTP) | |
139 | | (1ULL << OVS_KEY_ATTR_ICMP) | |
140 | | (1ULL << OVS_KEY_ATTR_ICMPV6) | |
141 | | (1ULL << OVS_KEY_ATTR_ARP) | |
ccf43786 SH |
142 | | (1ULL << OVS_KEY_ATTR_ND) |
143 | | (1ULL << OVS_KEY_ATTR_MPLS)); | |
a097c0b2 PS |
144 | |
145 | /* Always allowed mask fields. */ | |
146 | mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL) | |
147 | | (1ULL << OVS_KEY_ATTR_IN_PORT) | |
148 | | (1ULL << OVS_KEY_ATTR_ETHERTYPE)); | |
149 | ||
150 | /* Check key attributes. */ | |
151 | if (match->key->eth.type == htons(ETH_P_ARP) | |
152 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
153 | key_expected |= 1ULL << OVS_KEY_ATTR_ARP; | |
154 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
155 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP; | |
156 | } | |
157 | ||
ccf43786 SH |
158 | if (eth_p_mpls(match->key->eth.type)) { |
159 | key_expected |= 1ULL << OVS_KEY_ATTR_MPLS; | |
160 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
161 | mask_allowed |= 1ULL << OVS_KEY_ATTR_MPLS; | |
162 | } | |
163 | ||
a097c0b2 PS |
164 | if (match->key->eth.type == htons(ETH_P_IP)) { |
165 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV4; | |
166 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
167 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4; | |
168 | ||
169 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
170 | if (match->key->ip.proto == IPPROTO_UDP) { | |
171 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
172 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
173 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
174 | } | |
175 | ||
176 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
177 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
178 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
179 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
180 | } | |
181 | ||
182 | if (match->key->ip.proto == IPPROTO_TCP) { | |
183 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
dc235f7f JR |
184 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS; |
185 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
a097c0b2 | 186 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; |
dc235f7f JR |
187 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS; |
188 | } | |
a097c0b2 PS |
189 | } |
190 | ||
191 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
192 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMP; | |
193 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
194 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP; | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
199 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
200 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV6; | |
201 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
202 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6; | |
203 | ||
204 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
205 | if (match->key->ip.proto == IPPROTO_UDP) { | |
206 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
207 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
208 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
209 | } | |
210 | ||
211 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
212 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
213 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
214 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
215 | } | |
216 | ||
217 | if (match->key->ip.proto == IPPROTO_TCP) { | |
218 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
dc235f7f JR |
219 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS; |
220 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
a097c0b2 | 221 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; |
dc235f7f JR |
222 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS; |
223 | } | |
a097c0b2 PS |
224 | } |
225 | ||
226 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
227 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
228 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
229 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
230 | ||
708fb4c5 | 231 | if (match->key->tp.src == |
a097c0b2 | 232 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
708fb4c5 | 233 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
a097c0b2 | 234 | key_expected |= 1ULL << OVS_KEY_ATTR_ND; |
560f3099 | 235 | if (match->mask && (match->mask->key.tp.src == htons(0xff))) |
a097c0b2 PS |
236 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ND; |
237 | } | |
238 | } | |
239 | } | |
240 | } | |
241 | ||
242 | if ((key_attrs & key_expected) != key_expected) { | |
243 | /* Key attributes check failed. */ | |
7d16c847 | 244 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", |
9233cef7 JR |
245 | (unsigned long long)key_attrs, |
246 | (unsigned long long)key_expected); | |
a097c0b2 PS |
247 | return false; |
248 | } | |
249 | ||
250 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
251 | /* Mask attributes check failed. */ | |
7d16c847 | 252 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", |
9233cef7 JR |
253 | (unsigned long long)mask_attrs, |
254 | (unsigned long long)mask_allowed); | |
a097c0b2 PS |
255 | return false; |
256 | } | |
257 | ||
258 | return true; | |
259 | } | |
260 | ||
8b7ea2d4 WZ |
261 | size_t ovs_tun_key_attr_size(void) |
262 | { | |
263 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
af465b67 PS |
264 | * updating this function. |
265 | */ | |
8b7ea2d4 WZ |
266 | return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ |
267 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
268 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
269 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
270 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
271 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
272 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
273 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
274 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
0c7930a3 TG |
275 | /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with |
276 | * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it. | |
277 | */ | |
8b7ea2d4 WZ |
278 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ |
279 | + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
280 | } | |
281 | ||
4e25b8c1 JS |
282 | size_t ovs_key_attr_size(void) |
283 | { | |
284 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
af465b67 PS |
285 | * updating this function. |
286 | */ | |
9daf2348 | 287 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26); |
4e25b8c1 JS |
288 | |
289 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
290 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
8b7ea2d4 | 291 | + ovs_tun_key_attr_size() |
4e25b8c1 JS |
292 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
293 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
294 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
295 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
c05e2094 | 296 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */ |
a94ebc39 | 297 | + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */ |
372ce973 | 298 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */ |
c05e2094 | 299 | + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */ |
4e25b8c1 JS |
300 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ |
301 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
302 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
303 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
304 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
305 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
306 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
307 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
308 | } | |
309 | ||
6da061f4 JG |
310 | static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = { |
311 | [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) }, | |
312 | }; | |
313 | ||
ec959cdc TG |
314 | static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
315 | [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) }, | |
316 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) }, | |
317 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) }, | |
318 | [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 }, | |
319 | [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 }, | |
320 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 }, | |
321 | [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 }, | |
322 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) }, | |
323 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) }, | |
324 | [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 }, | |
6da061f4 JG |
325 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE }, |
326 | [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED, | |
327 | .next = ovs_vxlan_ext_key_lens }, | |
a097c0b2 PS |
328 | }; |
329 | ||
ec959cdc TG |
330 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
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) }, | |
c05e2094 | 354 | [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) }, |
a94ebc39 | 355 | [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) }, |
372ce973 | 356 | [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) }, |
c05e2094 | 357 | [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) }, |
ec959cdc | 358 | }; |
a0fb56c1 | 359 | |
6da061f4 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 | ||
a097c0b2 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[], | |
9233cef7 | 383 | u64 *attrsp, bool log, bool nz) |
a097c0b2 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) { | |
7d16c847 | 395 | OVS_NLERR(log, "Key type %d is out of range max %d", |
a097c0b2 PS |
396 | type, OVS_KEY_ATTR_MAX); |
397 | return -EINVAL; | |
398 | } | |
399 | ||
400 | if (attrs & (1ULL << type)) { | |
7d16c847 | 401 | OVS_NLERR(log, "Duplicate key (type %d).", type); |
a097c0b2 PS |
402 | return -EINVAL; |
403 | } | |
404 | ||
ec959cdc | 405 | expected_len = ovs_key_lens[type].len; |
6da061f4 | 406 | if (!check_attr_len(nla_len(nla), expected_len)) { |
7d16c847 PS |
407 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", |
408 | type, nla_len(nla), expected_len); | |
a097c0b2 PS |
409 | return -EINVAL; |
410 | } | |
411 | ||
412 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
413 | attrs |= 1ULL << type; | |
414 | a[type] = nla; | |
415 | } | |
416 | } | |
417 | if (rem) { | |
9233cef7 | 418 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); |
a097c0b2 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, | |
9233cef7 JR |
427 | const struct nlattr *a[], u64 *attrsp, |
428 | bool log) | |
a097c0b2 | 429 | { |
9233cef7 | 430 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); |
a097c0b2 PS |
431 | } |
432 | ||
433 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
9233cef7 JR |
434 | const struct nlattr *a[], u64 *attrsp, |
435 | bool log) | |
a097c0b2 | 436 | { |
9233cef7 | 437 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); |
a097c0b2 PS |
438 | } |
439 | ||
7d16c847 PS |
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 | ||
4b163224 | 485 | opt_key_offset = TUN_METADATA_OFFSET(nla_len(a)); |
7d16c847 PS |
486 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), |
487 | nla_len(a), is_mask); | |
488 | return 0; | |
489 | } | |
490 | ||
6da061f4 | 491 | static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr, |
0c7930a3 TG |
492 | struct sw_flow_match *match, bool is_mask, |
493 | bool log) | |
494 | { | |
6da061f4 JG |
495 | struct nlattr *a; |
496 | int rem; | |
0c7930a3 | 497 | unsigned long opt_key_offset; |
e23775f2 | 498 | struct vxlan_metadata opts; |
0c7930a3 TG |
499 | |
500 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
501 | ||
0c7930a3 | 502 | memset(&opts, 0, sizeof(opts)); |
6da061f4 JG |
503 | nla_for_each_nested(a, attr, rem) { |
504 | int type = nla_type(a); | |
0c7930a3 | 505 | |
6da061f4 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 | } | |
0c7930a3 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 | ||
a097c0b2 | 547 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, |
9233cef7 JR |
548 | struct sw_flow_match *match, bool is_mask, |
549 | bool log) | |
a097c0b2 PS |
550 | { |
551 | struct nlattr *a; | |
552 | int rem; | |
553 | bool ttl = false; | |
554 | __be16 tun_flags = 0; | |
0c7930a3 | 555 | int opts_type = 0; |
a097c0b2 PS |
556 | |
557 | nla_for_each_nested(a, attr, rem) { | |
558 | int type = nla_type(a); | |
7d16c847 PS |
559 | int err; |
560 | ||
a097c0b2 | 561 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
7d16c847 | 562 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", |
9233cef7 | 563 | type, OVS_TUNNEL_KEY_ATTR_MAX); |
a097c0b2 PS |
564 | return -EINVAL; |
565 | } | |
566 | ||
6da061f4 JG |
567 | if (!check_attr_len(nla_len(a), |
568 | ovs_tunnel_key_lens[type].len)) { | |
7d16c847 | 569 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", |
ec959cdc | 570 | type, nla_len(a), ovs_tunnel_key_lens[type].len); |
a097c0b2 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: | |
e23775f2 | 581 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src, |
dd693f9b | 582 | nla_get_in_addr(a), is_mask); |
a097c0b2 PS |
583 | break; |
584 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
e23775f2 | 585 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst, |
dd693f9b | 586 | nla_get_in_addr(a), is_mask); |
a097c0b2 PS |
587 | break; |
588 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
e23775f2 | 589 | SW_FLOW_KEY_PUT(match, tun_key.tos, |
a097c0b2 PS |
590 | nla_get_u8(a), is_mask); |
591 | break; | |
592 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
e23775f2 | 593 | SW_FLOW_KEY_PUT(match, tun_key.ttl, |
a097c0b2 PS |
594 | nla_get_u8(a), is_mask); |
595 | ttl = true; | |
596 | break; | |
597 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
598 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
599 | break; | |
600 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
601 | tun_flags |= TUNNEL_CSUM; | |
602 | break; | |
8b7ea2d4 WZ |
603 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: |
604 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
605 | nla_get_be16(a), is_mask); | |
606 | break; | |
607 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
608 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
609 | nla_get_be16(a), is_mask); | |
610 | break; | |
94872594 JG |
611 | case OVS_TUNNEL_KEY_ATTR_OAM: |
612 | tun_flags |= TUNNEL_OAM; | |
613 | break; | |
c1fc1411 | 614 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
0c7930a3 TG |
615 | if (opts_type) { |
616 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
617 | return -EINVAL; | |
618 | } | |
619 | ||
7d16c847 PS |
620 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); |
621 | if (err) | |
622 | return err; | |
c1fc1411 | 623 | |
0c7930a3 TG |
624 | tun_flags |= TUNNEL_GENEVE_OPT; |
625 | opts_type = type; | |
626 | break; | |
627 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
628 | if (opts_type) { | |
629 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
630 | return -EINVAL; | |
631 | } | |
632 | ||
633 | err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log); | |
634 | if (err) | |
635 | return err; | |
636 | ||
637 | tun_flags |= TUNNEL_VXLAN_OPT; | |
638 | opts_type = type; | |
c1fc1411 | 639 | break; |
a097c0b2 | 640 | default: |
7d16c847 | 641 | OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d", |
9233cef7 | 642 | type); |
a097c0b2 PS |
643 | return -EINVAL; |
644 | } | |
645 | } | |
646 | ||
647 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
648 | ||
649 | if (rem > 0) { | |
9233cef7 JR |
650 | OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.", |
651 | rem); | |
a097c0b2 PS |
652 | return -EINVAL; |
653 | } | |
654 | ||
655 | if (!is_mask) { | |
e23775f2 | 656 | if (!match->key->tun_key.u.ipv4.dst) { |
7d16c847 | 657 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); |
a097c0b2 PS |
658 | return -EINVAL; |
659 | } | |
660 | ||
661 | if (!ttl) { | |
9233cef7 | 662 | OVS_NLERR(log, "IPv4 tunnel TTL not specified."); |
a097c0b2 PS |
663 | return -EINVAL; |
664 | } | |
665 | } | |
666 | ||
0c7930a3 TG |
667 | return opts_type; |
668 | } | |
669 | ||
670 | static int vxlan_opt_to_nlattr(struct sk_buff *skb, | |
671 | const void *tun_opts, int swkey_tun_opts_len) | |
672 | { | |
e23775f2 | 673 | const struct vxlan_metadata *opts = tun_opts; |
0c7930a3 TG |
674 | struct nlattr *nla; |
675 | ||
676 | nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); | |
677 | if (!nla) | |
678 | return -EMSGSIZE; | |
679 | ||
680 | if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0) | |
681 | return -EMSGSIZE; | |
682 | ||
683 | nla_nest_end(skb, nla); | |
a097c0b2 PS |
684 | return 0; |
685 | } | |
686 | ||
8b7ea2d4 | 687 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
e23775f2 | 688 | const struct ip_tunnel_key *output, |
4b163224 | 689 | const void *tun_opts, int swkey_tun_opts_len) |
a097c0b2 | 690 | { |
a097c0b2 PS |
691 | if (output->tun_flags & TUNNEL_KEY && |
692 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
693 | return -EMSGSIZE; | |
e23775f2 PS |
694 | if (output->u.ipv4.src && |
695 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, | |
696 | output->u.ipv4.src)) | |
a097c0b2 | 697 | return -EMSGSIZE; |
e23775f2 PS |
698 | if (output->u.ipv4.dst && |
699 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, | |
700 | output->u.ipv4.dst)) | |
a097c0b2 | 701 | return -EMSGSIZE; |
e23775f2 PS |
702 | if (output->tos && |
703 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos)) | |
a097c0b2 | 704 | return -EMSGSIZE; |
e23775f2 | 705 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl)) |
a097c0b2 PS |
706 | return -EMSGSIZE; |
707 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
7d16c847 | 708 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
a097c0b2 PS |
709 | return -EMSGSIZE; |
710 | if ((output->tun_flags & TUNNEL_CSUM) && | |
7d16c847 | 711 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
a097c0b2 | 712 | return -EMSGSIZE; |
8b7ea2d4 | 713 | if (output->tp_src && |
7d16c847 | 714 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) |
8b7ea2d4 WZ |
715 | return -EMSGSIZE; |
716 | if (output->tp_dst && | |
7d16c847 | 717 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) |
8b7ea2d4 | 718 | return -EMSGSIZE; |
94872594 | 719 | if ((output->tun_flags & TUNNEL_OAM) && |
7d16c847 | 720 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) |
94872594 | 721 | return -EMSGSIZE; |
0c7930a3 TG |
722 | if (tun_opts) { |
723 | if (output->tun_flags & TUNNEL_GENEVE_OPT && | |
724 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
725 | swkey_tun_opts_len, tun_opts)) | |
726 | return -EMSGSIZE; | |
e23775f2 PS |
727 | else if (output->tun_flags & TUNNEL_VXLAN_OPT && |
728 | vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len)) | |
0c7930a3 TG |
729 | return -EMSGSIZE; |
730 | } | |
a097c0b2 | 731 | |
8b7ea2d4 WZ |
732 | return 0; |
733 | } | |
734 | ||
8b7ea2d4 | 735 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
e23775f2 | 736 | const struct ip_tunnel_key *output, |
4b163224 | 737 | const void *tun_opts, int swkey_tun_opts_len) |
8b7ea2d4 WZ |
738 | { |
739 | struct nlattr *nla; | |
740 | int err; | |
741 | ||
742 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
743 | if (!nla) | |
744 | return -EMSGSIZE; | |
745 | ||
746 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); | |
747 | if (err) | |
748 | return err; | |
749 | ||
a097c0b2 PS |
750 | nla_nest_end(skb, nla); |
751 | return 0; | |
752 | } | |
753 | ||
8b7ea2d4 | 754 | int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb, |
e23775f2 PS |
755 | const struct ip_tunnel_info *egress_tun_info, |
756 | const void *egress_tun_opts) | |
8b7ea2d4 | 757 | { |
e23775f2 PS |
758 | return __ipv4_tun_to_nlattr(skb, &egress_tun_info->key, |
759 | egress_tun_opts, | |
8b7ea2d4 WZ |
760 | egress_tun_info->options_len); |
761 | } | |
a097c0b2 | 762 | |
038e34ab JS |
763 | static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, |
764 | u64 *attrs, const struct nlattr **a, | |
765 | bool is_mask, bool log) | |
a097c0b2 | 766 | { |
7804df20 AZ |
767 | if (*attrs & (1ULL << OVS_KEY_ATTR_DP_HASH)) { |
768 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
769 | ||
770 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
771 | *attrs &= ~(1ULL << OVS_KEY_ATTR_DP_HASH); | |
772 | } | |
773 | ||
a6059080 AZ |
774 | if (*attrs & (1ULL << OVS_KEY_ATTR_RECIRC_ID)) { |
775 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
776 | ||
777 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
778 | *attrs &= ~(1ULL << OVS_KEY_ATTR_RECIRC_ID); | |
779 | } | |
780 | ||
a097c0b2 PS |
781 | if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) { |
782 | SW_FLOW_KEY_PUT(match, phy.priority, | |
783 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
784 | *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY); | |
785 | } | |
786 | ||
787 | if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) { | |
788 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
789 | ||
a473df5b | 790 | if (is_mask) { |
a097c0b2 | 791 | in_port = 0xffffffff; /* Always exact match in_port. */ |
a473df5b | 792 | } else if (in_port >= DP_MAX_PORTS) { |
7d16c847 | 793 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
a473df5b | 794 | in_port, DP_MAX_PORTS); |
a097c0b2 | 795 | return -EINVAL; |
a473df5b | 796 | } |
a097c0b2 PS |
797 | |
798 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
799 | *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT); | |
800 | } else if (!is_mask) { | |
801 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
802 | } | |
803 | ||
804 | if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) { | |
805 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
806 | ||
807 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
808 | *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK); | |
809 | } | |
810 | if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) { | |
811 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
0c7930a3 | 812 | is_mask, log) < 0) |
a097c0b2 PS |
813 | return -EINVAL; |
814 | *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL); | |
815 | } | |
a94ebc39 JS |
816 | |
817 | if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && | |
038e34ab | 818 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { |
c05e2094 JS |
819 | u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]); |
820 | ||
821 | if (ct_state & ~CT_SUPPORTED_MASK) { | |
822 | OVS_NLERR(log, "ct_state flags %08x unsupported", | |
823 | ct_state); | |
824 | return -EINVAL; | |
825 | } | |
a94ebc39 JS |
826 | |
827 | SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask); | |
828 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); | |
829 | } | |
830 | if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && | |
038e34ab | 831 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) { |
a94ebc39 JS |
832 | u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); |
833 | ||
834 | SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask); | |
835 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); | |
836 | } | |
372ce973 | 837 | if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) && |
038e34ab | 838 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) { |
372ce973 JS |
839 | u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]); |
840 | ||
841 | SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask); | |
842 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK); | |
843 | } | |
c05e2094 JS |
844 | if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) && |
845 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) { | |
846 | const struct ovs_key_ct_labels *cl; | |
038e34ab | 847 | |
c05e2094 JS |
848 | cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]); |
849 | SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels, | |
038e34ab | 850 | sizeof(*cl), is_mask); |
c05e2094 | 851 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS); |
038e34ab | 852 | } |
a097c0b2 PS |
853 | return 0; |
854 | } | |
855 | ||
038e34ab JS |
856 | static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match, |
857 | u64 attrs, const struct nlattr **a, | |
858 | bool is_mask, bool log) | |
a097c0b2 PS |
859 | { |
860 | int err; | |
a097c0b2 | 861 | |
038e34ab | 862 | err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log); |
a097c0b2 PS |
863 | if (err) |
864 | return err; | |
865 | ||
866 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) { | |
867 | const struct ovs_key_ethernet *eth_key; | |
868 | ||
869 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
870 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
871 | eth_key->eth_src, ETH_ALEN, is_mask); | |
872 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
873 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
874 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET); | |
875 | } | |
876 | ||
877 | if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) { | |
878 | __be16 tci; | |
879 | ||
880 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
881 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
882 | if (is_mask) | |
7d16c847 | 883 | OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit."); |
a097c0b2 | 884 | else |
7d16c847 | 885 | OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set."); |
a097c0b2 PS |
886 | |
887 | return -EINVAL; | |
888 | } | |
889 | ||
890 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
891 | attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN); | |
f3ccd17d | 892 | } |
a097c0b2 PS |
893 | |
894 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) { | |
895 | __be16 eth_type; | |
896 | ||
897 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
898 | if (is_mask) { | |
899 | /* Always exact match EtherType. */ | |
900 | eth_type = htons(0xffff); | |
935fc582 | 901 | } else if (!eth_proto_is_802_3(eth_type)) { |
7d16c847 | 902 | OVS_NLERR(log, "EtherType %x is less than min %x", |
9233cef7 | 903 | ntohs(eth_type), ETH_P_802_3_MIN); |
a097c0b2 PS |
904 | return -EINVAL; |
905 | } | |
906 | ||
907 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
908 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
909 | } else if (!is_mask) { | |
910 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
911 | } | |
912 | ||
e23775f2 | 913 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { |
a097c0b2 PS |
914 | const struct ovs_key_ipv4 *ipv4_key; |
915 | ||
916 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
917 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
7d16c847 | 918 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
9233cef7 | 919 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); |
a097c0b2 PS |
920 | return -EINVAL; |
921 | } | |
922 | SW_FLOW_KEY_PUT(match, ip.proto, | |
923 | ipv4_key->ipv4_proto, is_mask); | |
924 | SW_FLOW_KEY_PUT(match, ip.tos, | |
925 | ipv4_key->ipv4_tos, is_mask); | |
926 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
927 | ipv4_key->ipv4_ttl, is_mask); | |
928 | SW_FLOW_KEY_PUT(match, ip.frag, | |
929 | ipv4_key->ipv4_frag, is_mask); | |
930 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
931 | ipv4_key->ipv4_src, is_mask); | |
932 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
933 | ipv4_key->ipv4_dst, is_mask); | |
e23775f2 | 934 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); |
a097c0b2 PS |
935 | } |
936 | ||
937 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) { | |
938 | const struct ovs_key_ipv6 *ipv6_key; | |
939 | ||
940 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
941 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
7d16c847 | 942 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
9233cef7 | 943 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); |
a097c0b2 PS |
944 | return -EINVAL; |
945 | } | |
a0fb56c1 | 946 | |
65721038 | 947 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { |
9233cef7 JR |
948 | OVS_NLERR(log, |
949 | "Invalid IPv6 flow label value (value=%x, max=%x).", | |
67782539 JR |
950 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); |
951 | return -EINVAL; | |
952 | } | |
a0fb56c1 | 953 | |
a097c0b2 PS |
954 | SW_FLOW_KEY_PUT(match, ipv6.label, |
955 | ipv6_key->ipv6_label, is_mask); | |
956 | SW_FLOW_KEY_PUT(match, ip.proto, | |
957 | ipv6_key->ipv6_proto, is_mask); | |
958 | SW_FLOW_KEY_PUT(match, ip.tos, | |
959 | ipv6_key->ipv6_tclass, is_mask); | |
960 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
961 | ipv6_key->ipv6_hlimit, is_mask); | |
962 | SW_FLOW_KEY_PUT(match, ip.frag, | |
963 | ipv6_key->ipv6_frag, is_mask); | |
964 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
965 | ipv6_key->ipv6_src, | |
966 | sizeof(match->key->ipv6.addr.src), | |
967 | is_mask); | |
968 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
969 | ipv6_key->ipv6_dst, | |
970 | sizeof(match->key->ipv6.addr.dst), | |
971 | is_mask); | |
972 | ||
973 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6); | |
974 | } | |
975 | ||
976 | if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) { | |
977 | const struct ovs_key_arp *arp_key; | |
978 | ||
979 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
980 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
9233cef7 | 981 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
a097c0b2 PS |
982 | arp_key->arp_op); |
983 | return -EINVAL; | |
984 | } | |
985 | ||
986 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
987 | arp_key->arp_sip, is_mask); | |
988 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
989 | arp_key->arp_tip, is_mask); | |
990 | SW_FLOW_KEY_PUT(match, ip.proto, | |
991 | ntohs(arp_key->arp_op), is_mask); | |
992 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
993 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
994 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
995 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
996 | ||
997 | attrs &= ~(1ULL << OVS_KEY_ATTR_ARP); | |
998 | } | |
999 | ||
ccf43786 SH |
1000 | if (attrs & (1ULL << OVS_KEY_ATTR_MPLS)) { |
1001 | const struct ovs_key_mpls *mpls_key; | |
1002 | ||
1003 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
1004 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
1005 | mpls_key->mpls_lse, is_mask); | |
1006 | ||
1007 | attrs &= ~(1ULL << OVS_KEY_ATTR_MPLS); | |
62974663 | 1008 | } |
ccf43786 | 1009 | |
a097c0b2 PS |
1010 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) { |
1011 | const struct ovs_key_tcp *tcp_key; | |
1012 | ||
1013 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
708fb4c5 JR |
1014 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
1015 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
a097c0b2 PS |
1016 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP); |
1017 | } | |
1018 | ||
dc235f7f | 1019 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP_FLAGS)) { |
cab29271 JS |
1020 | SW_FLOW_KEY_PUT(match, tp.flags, |
1021 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
1022 | is_mask); | |
dc235f7f JR |
1023 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP_FLAGS); |
1024 | } | |
1025 | ||
a097c0b2 PS |
1026 | if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) { |
1027 | const struct ovs_key_udp *udp_key; | |
1028 | ||
1029 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
708fb4c5 JR |
1030 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
1031 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
a097c0b2 PS |
1032 | attrs &= ~(1ULL << OVS_KEY_ATTR_UDP); |
1033 | } | |
1034 | ||
1035 | if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) { | |
1036 | const struct ovs_key_sctp *sctp_key; | |
1037 | ||
1038 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
708fb4c5 JR |
1039 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
1040 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
a097c0b2 PS |
1041 | attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP); |
1042 | } | |
1043 | ||
1044 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) { | |
1045 | const struct ovs_key_icmp *icmp_key; | |
1046 | ||
1047 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
708fb4c5 | 1048 | SW_FLOW_KEY_PUT(match, tp.src, |
a097c0b2 | 1049 | htons(icmp_key->icmp_type), is_mask); |
708fb4c5 | 1050 | SW_FLOW_KEY_PUT(match, tp.dst, |
a097c0b2 PS |
1051 | htons(icmp_key->icmp_code), is_mask); |
1052 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP); | |
1053 | } | |
1054 | ||
1055 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) { | |
1056 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1057 | ||
1058 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
708fb4c5 | 1059 | SW_FLOW_KEY_PUT(match, tp.src, |
a097c0b2 | 1060 | htons(icmpv6_key->icmpv6_type), is_mask); |
708fb4c5 | 1061 | SW_FLOW_KEY_PUT(match, tp.dst, |
a097c0b2 PS |
1062 | htons(icmpv6_key->icmpv6_code), is_mask); |
1063 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6); | |
1064 | } | |
1065 | ||
1066 | if (attrs & (1ULL << OVS_KEY_ATTR_ND)) { | |
1067 | const struct ovs_key_nd *nd_key; | |
1068 | ||
1069 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1070 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1071 | nd_key->nd_target, | |
1072 | sizeof(match->key->ipv6.nd.target), | |
1073 | is_mask); | |
1074 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1075 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1076 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1077 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1078 | attrs &= ~(1ULL << OVS_KEY_ATTR_ND); | |
1079 | } | |
1080 | ||
a473df5b | 1081 | if (attrs != 0) { |
7d16c847 | 1082 | OVS_NLERR(log, "Unknown key attributes %llx", |
a473df5b | 1083 | (unsigned long long)attrs); |
a097c0b2 | 1084 | return -EINVAL; |
a473df5b | 1085 | } |
a097c0b2 PS |
1086 | |
1087 | return 0; | |
1088 | } | |
1089 | ||
ec959cdc TG |
1090 | static void nlattr_set(struct nlattr *attr, u8 val, |
1091 | const struct ovs_len_tbl *tbl) | |
a097c0b2 | 1092 | { |
62974663 DDP |
1093 | struct nlattr *nla; |
1094 | int rem; | |
a097c0b2 | 1095 | |
62974663 DDP |
1096 | /* The nlattr stream should already have been validated */ |
1097 | nla_for_each_nested(nla, attr, rem) { | |
6da061f4 JG |
1098 | if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) { |
1099 | if (tbl[nla_type(nla)].next) | |
1100 | tbl = tbl[nla_type(nla)].next; | |
1101 | nlattr_set(nla, val, tbl); | |
1102 | } else { | |
62974663 | 1103 | memset(nla_data(nla), val, nla_len(nla)); |
6da061f4 | 1104 | } |
c05e2094 JS |
1105 | |
1106 | if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE) | |
1107 | *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK; | |
62974663 DDP |
1108 | } |
1109 | } | |
1110 | ||
1111 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1112 | { | |
ec959cdc | 1113 | nlattr_set(attr, val, ovs_key_lens); |
a097c0b2 PS |
1114 | } |
1115 | ||
1116 | /** | |
1117 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1118 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1119 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1120 | * does not include any don't care bit. | |
038e34ab | 1121 | * @net: Used to determine per-namespace field support. |
a097c0b2 PS |
1122 | * @match: receives the extracted flow match information. |
1123 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1124 | * sequence. The fields should of the packet that triggered the creation | |
1125 | * of this flow. | |
1126 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1127 | * attribute specifies the mask field of the wildcarded flow. | |
9233cef7 JR |
1128 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1129 | * probing for feature compatibility this should be passed in as false to | |
1130 | * suppress unnecessary error logging. | |
a097c0b2 | 1131 | */ |
038e34ab | 1132 | int ovs_nla_get_match(struct net *net, struct sw_flow_match *match, |
f3ccd17d | 1133 | const struct nlattr *nla_key, |
9233cef7 JR |
1134 | const struct nlattr *nla_mask, |
1135 | bool log) | |
a097c0b2 PS |
1136 | { |
1137 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1138 | const struct nlattr *encap; | |
62974663 | 1139 | struct nlattr *newmask = NULL; |
a097c0b2 PS |
1140 | u64 key_attrs = 0; |
1141 | u64 mask_attrs = 0; | |
1142 | bool encap_valid = false; | |
1143 | int err; | |
1144 | ||
9233cef7 | 1145 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
a097c0b2 PS |
1146 | if (err) |
1147 | return err; | |
1148 | ||
1149 | if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) && | |
1150 | (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) && | |
1151 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1152 | __be16 tci; | |
1153 | ||
1154 | if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) && | |
1155 | (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) { | |
9233cef7 | 1156 | OVS_NLERR(log, "Invalid Vlan frame."); |
a097c0b2 PS |
1157 | return -EINVAL; |
1158 | } | |
1159 | ||
1160 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1161 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1162 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1163 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1164 | encap_valid = true; | |
1165 | ||
1166 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
9233cef7 | 1167 | err = parse_flow_nlattrs(encap, a, &key_attrs, log); |
a097c0b2 PS |
1168 | if (err) |
1169 | return err; | |
1170 | } else if (!tci) { | |
1171 | /* Corner case for truncated 802.1Q header. */ | |
1172 | if (nla_len(encap)) { | |
7d16c847 | 1173 | OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute."); |
a097c0b2 PS |
1174 | return -EINVAL; |
1175 | } | |
1176 | } else { | |
7d16c847 | 1177 | OVS_NLERR(log, "Encap attr is set for non-VLAN frame"); |
a097c0b2 PS |
1178 | return -EINVAL; |
1179 | } | |
1180 | } | |
1181 | ||
038e34ab | 1182 | err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log); |
a097c0b2 PS |
1183 | if (err) |
1184 | return err; | |
1185 | ||
f3ccd17d | 1186 | if (match->mask) { |
f3ccd17d PS |
1187 | if (!nla_mask) { |
1188 | /* Create an exact match mask. We need to set to 0xff | |
1189 | * all the 'match->mask' fields that have been touched | |
1190 | * in 'match->key'. We cannot simply memset | |
1191 | * 'match->mask', because padding bytes and fields not | |
1192 | * specified in 'match->key' should be left to 0. | |
1193 | * Instead, we use a stream of netlink attributes, | |
7d16c847 PS |
1194 | * copied from 'key' and set to 0xff. |
1195 | * ovs_key_from_nlattrs() will take care of filling | |
1196 | * 'match->mask' appropriately. | |
f3ccd17d PS |
1197 | */ |
1198 | newmask = kmemdup(nla_key, | |
1199 | nla_total_size(nla_len(nla_key)), | |
1200 | GFP_KERNEL); | |
1201 | if (!newmask) | |
1202 | return -ENOMEM; | |
62974663 | 1203 | |
f3ccd17d | 1204 | mask_set_nlattr(newmask, 0xff); |
62974663 | 1205 | |
f3ccd17d PS |
1206 | /* The userspace does not send tunnel attributes that |
1207 | * are 0, but we should not wildcard them nonetheless. | |
1208 | */ | |
e23775f2 | 1209 | if (match->key->tun_key.u.ipv4.dst) |
f3ccd17d PS |
1210 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, |
1211 | 0xff, true); | |
0b496cda | 1212 | |
f3ccd17d PS |
1213 | nla_mask = newmask; |
1214 | } | |
62974663 | 1215 | |
9233cef7 | 1216 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
a097c0b2 | 1217 | if (err) |
62974663 | 1218 | goto free_newmask; |
a097c0b2 | 1219 | |
f3ccd17d PS |
1220 | /* Always match on tci. */ |
1221 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
1222 | ||
62974663 | 1223 | if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { |
a097c0b2 PS |
1224 | __be16 eth_type = 0; |
1225 | __be16 tci = 0; | |
1226 | ||
1227 | if (!encap_valid) { | |
7d16c847 | 1228 | OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame."); |
62974663 DDP |
1229 | err = -EINVAL; |
1230 | goto free_newmask; | |
a097c0b2 PS |
1231 | } |
1232 | ||
1233 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1234 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1235 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1236 | ||
1237 | if (eth_type == htons(0xffff)) { | |
1238 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1239 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
9233cef7 JR |
1240 | err = parse_flow_mask_nlattrs(encap, a, |
1241 | &mask_attrs, log); | |
3854ab21 AW |
1242 | if (err) |
1243 | goto free_newmask; | |
a097c0b2 | 1244 | } else { |
7d16c847 | 1245 | OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).", |
9233cef7 | 1246 | ntohs(eth_type)); |
62974663 DDP |
1247 | err = -EINVAL; |
1248 | goto free_newmask; | |
a097c0b2 PS |
1249 | } |
1250 | ||
1251 | if (a[OVS_KEY_ATTR_VLAN]) | |
1252 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1253 | ||
1254 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
7d16c847 | 1255 | OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).", |
9233cef7 | 1256 | ntohs(tci)); |
62974663 DDP |
1257 | err = -EINVAL; |
1258 | goto free_newmask; | |
a097c0b2 PS |
1259 | } |
1260 | } | |
1261 | ||
038e34ab JS |
1262 | err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true, |
1263 | log); | |
a097c0b2 | 1264 | if (err) |
62974663 | 1265 | goto free_newmask; |
a097c0b2 PS |
1266 | } |
1267 | ||
9233cef7 | 1268 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
62974663 | 1269 | err = -EINVAL; |
a097c0b2 | 1270 | |
62974663 DDP |
1271 | free_newmask: |
1272 | kfree(newmask); | |
1273 | return err; | |
a097c0b2 PS |
1274 | } |
1275 | ||
bc619e29 JS |
1276 | static size_t get_ufid_len(const struct nlattr *attr, bool log) |
1277 | { | |
1278 | size_t len; | |
1279 | ||
1280 | if (!attr) | |
1281 | return 0; | |
1282 | ||
1283 | len = nla_len(attr); | |
1284 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1285 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1286 | nla_len(attr), MAX_UFID_LENGTH); | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | return len; | |
1291 | } | |
1292 | ||
1293 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1294 | * or false otherwise. | |
1295 | */ | |
1296 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1297 | bool log) | |
1298 | { | |
1299 | sfid->ufid_len = get_ufid_len(attr, log); | |
1300 | if (sfid->ufid_len) | |
1301 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1302 | ||
1303 | return sfid->ufid_len; | |
1304 | } | |
1305 | ||
1306 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1307 | const struct sw_flow_key *key, bool log) | |
1308 | { | |
1309 | struct sw_flow_key *new_key; | |
1310 | ||
1311 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1312 | return 0; | |
1313 | ||
1314 | /* If UFID was not provided, use unmasked key. */ | |
1315 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1316 | if (!new_key) | |
1317 | return -ENOMEM; | |
1318 | memcpy(new_key, key, sizeof(*key)); | |
1319 | sfid->unmasked_key = new_key; | |
1320 | ||
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1325 | { | |
1326 | return attr ? nla_get_u32(attr) : 0; | |
1327 | } | |
1328 | ||
a097c0b2 PS |
1329 | /** |
1330 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
c135bba1 | 1331 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
a097c0b2 PS |
1332 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1333 | * sequence. | |
9233cef7 JR |
1334 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1335 | * probing for feature compatibility this should be passed in as false to | |
1336 | * suppress unnecessary error logging. | |
a097c0b2 PS |
1337 | * |
1338 | * This parses a series of Netlink attributes that form a flow key, which must | |
1339 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1340 | * get the metadata, that is, the parts of the flow key that cannot be | |
1341 | * extracted from the packet itself. | |
1342 | */ | |
7d16c847 | 1343 | |
038e34ab | 1344 | int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr, |
9233cef7 JR |
1345 | struct sw_flow_key *key, |
1346 | bool log) | |
a097c0b2 | 1347 | { |
a097c0b2 | 1348 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
c135bba1 | 1349 | struct sw_flow_match match; |
a097c0b2 PS |
1350 | u64 attrs = 0; |
1351 | int err; | |
a097c0b2 | 1352 | |
9233cef7 | 1353 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
a097c0b2 PS |
1354 | if (err) |
1355 | return -EINVAL; | |
1356 | ||
1357 | memset(&match, 0, sizeof(match)); | |
c135bba1 | 1358 | match.key = key; |
a097c0b2 | 1359 | |
7f45215a | 1360 | memset(key, 0, OVS_SW_FLOW_KEY_METADATA_SIZE); |
a94ebc39 | 1361 | memset(&key->ct, 0, sizeof(key->ct)); |
c135bba1 | 1362 | key->phy.in_port = DP_MAX_PORTS; |
a097c0b2 | 1363 | |
038e34ab | 1364 | return metadata_from_nlattrs(net, &match, &attrs, a, false, log); |
a097c0b2 PS |
1365 | } |
1366 | ||
db7f2238 JS |
1367 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, |
1368 | const struct sw_flow_key *output, bool is_mask, | |
1369 | struct sk_buff *skb) | |
a097c0b2 PS |
1370 | { |
1371 | struct ovs_key_ethernet *eth_key; | |
1372 | struct nlattr *nla, *encap; | |
a097c0b2 | 1373 | |
7d16c847 | 1374 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
7804df20 AZ |
1375 | goto nla_put_failure; |
1376 | ||
7d16c847 | 1377 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) |
a6059080 AZ |
1378 | goto nla_put_failure; |
1379 | ||
a097c0b2 PS |
1380 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1381 | goto nla_put_failure; | |
1382 | ||
e23775f2 | 1383 | if ((swkey->tun_key.u.ipv4.dst || is_mask)) { |
4b163224 | 1384 | const void *opts = NULL; |
c1fc1411 | 1385 | |
fa6395df | 1386 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) |
4b163224 | 1387 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); |
c1fc1411 JG |
1388 | |
1389 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, | |
7d16c847 | 1390 | swkey->tun_opts_len)) |
c1fc1411 JG |
1391 | goto nla_put_failure; |
1392 | } | |
a097c0b2 PS |
1393 | |
1394 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1395 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1396 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1397 | goto nla_put_failure; | |
1398 | } else { | |
1399 | u16 upper_u16; | |
1400 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1401 | ||
1402 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1403 | (upper_u16 << 16) | output->phy.in_port)) | |
1404 | goto nla_put_failure; | |
1405 | } | |
1406 | ||
1407 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1408 | goto nla_put_failure; | |
1409 | ||
a94ebc39 JS |
1410 | if (ovs_ct_put_key(output, skb)) |
1411 | goto nla_put_failure; | |
1412 | ||
a097c0b2 PS |
1413 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1414 | if (!nla) | |
1415 | goto nla_put_failure; | |
1416 | ||
1417 | eth_key = nla_data(nla); | |
982a47ec JP |
1418 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1419 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
a097c0b2 PS |
1420 | |
1421 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1422 | __be16 eth_type; | |
1423 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1424 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1425 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1426 | goto nla_put_failure; | |
1427 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1428 | if (!swkey->eth.tci) | |
1429 | goto unencap; | |
1430 | } else | |
1431 | encap = NULL; | |
1432 | ||
1433 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1434 | /* | |
1435 | * Ethertype 802.2 is represented in the netlink with omitted | |
1436 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1437 | * 0xffff in the mask attribute. Ethertype can also | |
1438 | * be wildcarded. | |
1439 | */ | |
1440 | if (is_mask && output->eth.type) | |
1441 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1442 | output->eth.type)) | |
1443 | goto nla_put_failure; | |
1444 | goto unencap; | |
1445 | } | |
1446 | ||
1447 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1448 | goto nla_put_failure; | |
1449 | ||
1450 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1451 | struct ovs_key_ipv4 *ipv4_key; | |
1452 | ||
1453 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1454 | if (!nla) | |
1455 | goto nla_put_failure; | |
1456 | ipv4_key = nla_data(nla); | |
1457 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1458 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1459 | ipv4_key->ipv4_proto = output->ip.proto; | |
1460 | ipv4_key->ipv4_tos = output->ip.tos; | |
1461 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1462 | ipv4_key->ipv4_frag = output->ip.frag; | |
1463 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1464 | struct ovs_key_ipv6 *ipv6_key; | |
1465 | ||
1466 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1467 | if (!nla) | |
1468 | goto nla_put_failure; | |
1469 | ipv6_key = nla_data(nla); | |
1470 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1471 | sizeof(ipv6_key->ipv6_src)); | |
1472 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1473 | sizeof(ipv6_key->ipv6_dst)); | |
1474 | ipv6_key->ipv6_label = output->ipv6.label; | |
1475 | ipv6_key->ipv6_proto = output->ip.proto; | |
1476 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1477 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1478 | ipv6_key->ipv6_frag = output->ip.frag; | |
1479 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1480 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1481 | struct ovs_key_arp *arp_key; | |
1482 | ||
1483 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1484 | if (!nla) | |
1485 | goto nla_put_failure; | |
1486 | arp_key = nla_data(nla); | |
1487 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1488 | arp_key->arp_sip = output->ipv4.addr.src; | |
1489 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1490 | arp_key->arp_op = htons(output->ip.proto); | |
982a47ec JP |
1491 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1492 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
ccf43786 SH |
1493 | } else if (eth_p_mpls(swkey->eth.type)) { |
1494 | struct ovs_key_mpls *mpls_key; | |
1495 | ||
1496 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1497 | if (!nla) | |
1498 | goto nla_put_failure; | |
1499 | mpls_key = nla_data(nla); | |
1500 | mpls_key->mpls_lse = output->mpls.top_lse; | |
a097c0b2 PS |
1501 | } |
1502 | ||
1503 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1504 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1505 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1506 | ||
1507 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1508 | struct ovs_key_tcp *tcp_key; | |
1509 | ||
1510 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1511 | if (!nla) | |
1512 | goto nla_put_failure; | |
1513 | tcp_key = nla_data(nla); | |
708fb4c5 JR |
1514 | tcp_key->tcp_src = output->tp.src; |
1515 | tcp_key->tcp_dst = output->tp.dst; | |
1516 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1517 | output->tp.flags)) | |
1518 | goto nla_put_failure; | |
a097c0b2 PS |
1519 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1520 | struct ovs_key_udp *udp_key; | |
1521 | ||
1522 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1523 | if (!nla) | |
1524 | goto nla_put_failure; | |
1525 | udp_key = nla_data(nla); | |
708fb4c5 JR |
1526 | udp_key->udp_src = output->tp.src; |
1527 | udp_key->udp_dst = output->tp.dst; | |
a097c0b2 PS |
1528 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1529 | struct ovs_key_sctp *sctp_key; | |
1530 | ||
1531 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1532 | if (!nla) | |
1533 | goto nla_put_failure; | |
1534 | sctp_key = nla_data(nla); | |
708fb4c5 JR |
1535 | sctp_key->sctp_src = output->tp.src; |
1536 | sctp_key->sctp_dst = output->tp.dst; | |
a097c0b2 PS |
1537 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1538 | swkey->ip.proto == IPPROTO_ICMP) { | |
1539 | struct ovs_key_icmp *icmp_key; | |
1540 | ||
1541 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1542 | if (!nla) | |
1543 | goto nla_put_failure; | |
1544 | icmp_key = nla_data(nla); | |
708fb4c5 JR |
1545 | icmp_key->icmp_type = ntohs(output->tp.src); |
1546 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
a097c0b2 PS |
1547 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1548 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1549 | struct ovs_key_icmpv6 *icmpv6_key; | |
1550 | ||
1551 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1552 | sizeof(*icmpv6_key)); | |
1553 | if (!nla) | |
1554 | goto nla_put_failure; | |
1555 | icmpv6_key = nla_data(nla); | |
708fb4c5 JR |
1556 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1557 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
a097c0b2 PS |
1558 | |
1559 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1560 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1561 | struct ovs_key_nd *nd_key; | |
1562 | ||
1563 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1564 | if (!nla) | |
1565 | goto nla_put_failure; | |
1566 | nd_key = nla_data(nla); | |
1567 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1568 | sizeof(nd_key->nd_target)); | |
982a47ec JP |
1569 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1570 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
a097c0b2 PS |
1571 | } |
1572 | } | |
1573 | } | |
1574 | ||
1575 | unencap: | |
1576 | if (encap) | |
1577 | nla_nest_end(skb, encap); | |
1578 | ||
1579 | return 0; | |
1580 | ||
1581 | nla_put_failure: | |
1582 | return -EMSGSIZE; | |
1583 | } | |
1584 | ||
db7f2238 JS |
1585 | int ovs_nla_put_key(const struct sw_flow_key *swkey, |
1586 | const struct sw_flow_key *output, int attr, bool is_mask, | |
1587 | struct sk_buff *skb) | |
1588 | { | |
1589 | int err; | |
1590 | struct nlattr *nla; | |
1591 | ||
1592 | nla = nla_nest_start(skb, attr); | |
1593 | if (!nla) | |
1594 | return -EMSGSIZE; | |
1595 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
1596 | if (err) | |
1597 | return err; | |
1598 | nla_nest_end(skb, nla); | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | /* Called with ovs_mutex or RCU read lock. */ | |
bc619e29 JS |
1604 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) |
1605 | { | |
1606 | if (ovs_identifier_is_ufid(&flow->id)) | |
1607 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
1608 | flow->id.ufid); | |
1609 | ||
1610 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
1611 | OVS_FLOW_ATTR_KEY, false, skb); | |
1612 | } | |
1613 | ||
1614 | /* Called with ovs_mutex or RCU read lock. */ | |
1615 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
db7f2238 | 1616 | { |
b037bc5a | 1617 | return ovs_nla_put_key(&flow->key, &flow->key, |
db7f2238 JS |
1618 | OVS_FLOW_ATTR_KEY, false, skb); |
1619 | } | |
1620 | ||
1621 | /* Called with ovs_mutex or RCU read lock. */ | |
1622 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
1623 | { | |
1624 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
1625 | OVS_FLOW_ATTR_MASK, true, skb); | |
1626 | } | |
1627 | ||
a097c0b2 PS |
1628 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
1629 | ||
9233cef7 | 1630 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
a097c0b2 PS |
1631 | { |
1632 | struct sw_flow_actions *sfa; | |
1633 | ||
a473df5b | 1634 | if (size > MAX_ACTIONS_BUFSIZE) { |
7d16c847 | 1635 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
a097c0b2 | 1636 | return ERR_PTR(-EINVAL); |
a473df5b | 1637 | } |
a097c0b2 PS |
1638 | |
1639 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1640 | if (!sfa) | |
1641 | return ERR_PTR(-ENOMEM); | |
1642 | ||
1643 | sfa->actions_len = 0; | |
1644 | return sfa; | |
1645 | } | |
1646 | ||
e23775f2 | 1647 | static void ovs_nla_free_set_action(const struct nlattr *a) |
a097c0b2 | 1648 | { |
e23775f2 PS |
1649 | const struct nlattr *ovs_key = nla_data(a); |
1650 | struct ovs_tunnel_info *ovs_tun; | |
1651 | ||
1652 | switch (nla_type(ovs_key)) { | |
1653 | case OVS_KEY_ATTR_TUNNEL_INFO: | |
1654 | ovs_tun = nla_data(ovs_key); | |
1655 | ovs_dst_release((struct dst_entry *)ovs_tun->tun_dst); | |
1656 | break; | |
1657 | } | |
1658 | } | |
1659 | ||
1660 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1661 | { | |
1662 | const struct nlattr *a; | |
1663 | int rem; | |
1664 | ||
1665 | if (!sf_acts) | |
1666 | return; | |
1667 | ||
1668 | nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { | |
1669 | switch (nla_type(a)) { | |
1670 | case OVS_ACTION_ATTR_SET: | |
1671 | ovs_nla_free_set_action(a); | |
1672 | break; | |
a94ebc39 JS |
1673 | case OVS_ACTION_ATTR_CT: |
1674 | ovs_ct_free_action(a); | |
1675 | break; | |
e23775f2 PS |
1676 | } |
1677 | } | |
1678 | ||
a097c0b2 PS |
1679 | kfree(sf_acts); |
1680 | } | |
1681 | ||
e23775f2 PS |
1682 | static void __ovs_nla_free_flow_actions(struct rcu_head *head) |
1683 | { | |
1684 | ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); | |
1685 | } | |
1686 | ||
a097c0b2 | 1687 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
af465b67 PS |
1688 | * The caller must hold rcu_read_lock for this to be sensible. |
1689 | */ | |
e23775f2 | 1690 | void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) |
a097c0b2 | 1691 | { |
e23775f2 | 1692 | call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); |
a097c0b2 PS |
1693 | } |
1694 | ||
1695 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
9233cef7 | 1696 | int attr_len, bool log) |
a097c0b2 PS |
1697 | { |
1698 | ||
1699 | struct sw_flow_actions *acts; | |
1700 | int new_acts_size; | |
1701 | int req_size = NLA_ALIGN(attr_len); | |
1702 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1703 | (*sfa)->actions_len; | |
1704 | ||
1705 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1706 | goto out; | |
1707 | ||
1708 | new_acts_size = ksize(*sfa) * 2; | |
1709 | ||
1710 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1711 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1712 | return ERR_PTR(-EMSGSIZE); | |
1713 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1714 | } | |
1715 | ||
9233cef7 | 1716 | acts = nla_alloc_flow_actions(new_acts_size, log); |
a097c0b2 PS |
1717 | if (IS_ERR(acts)) |
1718 | return (void *)acts; | |
1719 | ||
1720 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1721 | acts->actions_len = (*sfa)->actions_len; | |
c3bb15b3 | 1722 | acts->orig_len = (*sfa)->orig_len; |
a097c0b2 PS |
1723 | kfree(*sfa); |
1724 | *sfa = acts; | |
1725 | ||
1726 | out: | |
1727 | (*sfa)->actions_len += req_size; | |
1728 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1729 | } | |
1730 | ||
7d16c847 PS |
1731 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
1732 | int attrtype, void *data, int len, bool log) | |
a097c0b2 PS |
1733 | { |
1734 | struct nlattr *a; | |
1735 | ||
9233cef7 | 1736 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
a097c0b2 | 1737 | if (IS_ERR(a)) |
f0cd669f | 1738 | return a; |
a097c0b2 PS |
1739 | |
1740 | a->nla_type = attrtype; | |
1741 | a->nla_len = nla_attr_size(len); | |
1742 | ||
1743 | if (data) | |
1744 | memcpy(nla_data(a), data, len); | |
1745 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1746 | ||
f0cd669f JG |
1747 | return a; |
1748 | } | |
1749 | ||
a94ebc39 JS |
1750 | int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, |
1751 | int len, bool log) | |
f0cd669f JG |
1752 | { |
1753 | struct nlattr *a; | |
1754 | ||
9233cef7 | 1755 | a = __add_action(sfa, attrtype, data, len, log); |
f0cd669f JG |
1756 | if (IS_ERR(a)) |
1757 | return PTR_ERR(a); | |
1758 | ||
a097c0b2 PS |
1759 | return 0; |
1760 | } | |
1761 | ||
1762 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
9233cef7 | 1763 | int attrtype, bool log) |
a097c0b2 PS |
1764 | { |
1765 | int used = (*sfa)->actions_len; | |
1766 | int err; | |
1767 | ||
a94ebc39 | 1768 | err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); |
a097c0b2 PS |
1769 | if (err) |
1770 | return err; | |
1771 | ||
1772 | return used; | |
1773 | } | |
1774 | ||
1775 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1776 | int st_offset) | |
1777 | { | |
1778 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1779 | st_offset); | |
1780 | ||
1781 | a->nla_len = sfa->actions_len - st_offset; | |
1782 | } | |
1783 | ||
a94ebc39 | 1784 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
ccf43786 SH |
1785 | const struct sw_flow_key *key, |
1786 | int depth, struct sw_flow_actions **sfa, | |
9233cef7 | 1787 | __be16 eth_type, __be16 vlan_tci, bool log); |
ccf43786 | 1788 | |
a94ebc39 | 1789 | static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, |
a097c0b2 | 1790 | const struct sw_flow_key *key, int depth, |
ccf43786 | 1791 | struct sw_flow_actions **sfa, |
9233cef7 | 1792 | __be16 eth_type, __be16 vlan_tci, bool log) |
a097c0b2 PS |
1793 | { |
1794 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1795 | const struct nlattr *probability, *actions; | |
1796 | const struct nlattr *a; | |
1797 | int rem, start, err, st_acts; | |
1798 | ||
1799 | memset(attrs, 0, sizeof(attrs)); | |
1800 | nla_for_each_nested(a, attr, rem) { | |
1801 | int type = nla_type(a); | |
1802 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1803 | return -EINVAL; | |
1804 | attrs[type] = a; | |
1805 | } | |
1806 | if (rem) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1810 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1811 | return -EINVAL; | |
1812 | ||
1813 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1814 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1815 | return -EINVAL; | |
1816 | ||
1817 | /* validation done, copy sample action. */ | |
9233cef7 | 1818 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
a097c0b2 PS |
1819 | if (start < 0) |
1820 | return start; | |
a94ebc39 JS |
1821 | err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, |
1822 | nla_data(probability), sizeof(u32), log); | |
a097c0b2 PS |
1823 | if (err) |
1824 | return err; | |
9233cef7 | 1825 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
a097c0b2 PS |
1826 | if (st_acts < 0) |
1827 | return st_acts; | |
1828 | ||
a94ebc39 | 1829 | err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa, |
9233cef7 | 1830 | eth_type, vlan_tci, log); |
a097c0b2 PS |
1831 | if (err) |
1832 | return err; | |
1833 | ||
1834 | add_nested_action_end(*sfa, st_acts); | |
1835 | add_nested_action_end(*sfa, start); | |
1836 | ||
1837 | return 0; | |
1838 | } | |
1839 | ||
a097c0b2 PS |
1840 | void ovs_match_init(struct sw_flow_match *match, |
1841 | struct sw_flow_key *key, | |
1842 | struct sw_flow_mask *mask) | |
1843 | { | |
1844 | memset(match, 0, sizeof(*match)); | |
1845 | match->key = key; | |
1846 | match->mask = mask; | |
1847 | ||
1848 | memset(key, 0, sizeof(*key)); | |
1849 | ||
1850 | if (mask) { | |
1851 | memset(&mask->key, 0, sizeof(mask->key)); | |
1852 | mask->range.start = mask->range.end = 0; | |
1853 | } | |
1854 | } | |
1855 | ||
4b163224 TG |
1856 | static int validate_geneve_opts(struct sw_flow_key *key) |
1857 | { | |
1858 | struct geneve_opt *option; | |
1859 | int opts_len = key->tun_opts_len; | |
1860 | bool crit_opt = false; | |
1861 | ||
1862 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
1863 | while (opts_len > 0) { | |
1864 | int len; | |
1865 | ||
1866 | if (opts_len < sizeof(*option)) | |
1867 | return -EINVAL; | |
1868 | ||
1869 | len = sizeof(*option) + option->length * 4; | |
1870 | if (len > opts_len) | |
1871 | return -EINVAL; | |
1872 | ||
1873 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1874 | ||
1875 | option = (struct geneve_opt *)((u8 *)option + len); | |
1876 | opts_len -= len; | |
1877 | }; | |
1878 | ||
1879 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1880 | ||
1881 | return 0; | |
1882 | } | |
1883 | ||
a097c0b2 | 1884 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
9233cef7 | 1885 | struct sw_flow_actions **sfa, bool log) |
a097c0b2 PS |
1886 | { |
1887 | struct sw_flow_match match; | |
1888 | struct sw_flow_key key; | |
e23775f2 PS |
1889 | struct metadata_dst *tun_dst; |
1890 | struct ip_tunnel_info *tun_info; | |
1891 | struct ovs_tunnel_info *ovs_tun; | |
f0cd669f | 1892 | struct nlattr *a; |
e23775f2 | 1893 | int err = 0, start, opts_type; |
a097c0b2 PS |
1894 | |
1895 | ovs_match_init(&match, &key, NULL); | |
0c7930a3 TG |
1896 | opts_type = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log); |
1897 | if (opts_type < 0) | |
1898 | return opts_type; | |
a097c0b2 | 1899 | |
c1fc1411 | 1900 | if (key.tun_opts_len) { |
0c7930a3 TG |
1901 | switch (opts_type) { |
1902 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
1903 | err = validate_geneve_opts(&key); | |
1904 | if (err < 0) | |
1905 | return err; | |
1906 | break; | |
1907 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
1908 | break; | |
1909 | } | |
c1fc1411 JG |
1910 | }; |
1911 | ||
9233cef7 | 1912 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
a097c0b2 PS |
1913 | if (start < 0) |
1914 | return start; | |
1915 | ||
e23775f2 PS |
1916 | tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL); |
1917 | if (!tun_dst) | |
1918 | return -ENOMEM; | |
1919 | ||
f0cd669f | 1920 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
e23775f2 PS |
1921 | sizeof(*ovs_tun), log); |
1922 | if (IS_ERR(a)) { | |
1923 | ovs_dst_release((struct dst_entry *)tun_dst); | |
f0cd669f | 1924 | return PTR_ERR(a); |
e23775f2 | 1925 | } |
f0cd669f | 1926 | |
e23775f2 PS |
1927 | ovs_tun = nla_data(a); |
1928 | ovs_tun->tun_dst = tun_dst; | |
c1fc1411 | 1929 | |
e23775f2 PS |
1930 | tun_info = &tun_dst->u.tun_info; |
1931 | tun_info->mode = IP_TUNNEL_INFO_TX; | |
1932 | tun_info->key = key.tun_key; | |
f0cd669f | 1933 | |
e23775f2 PS |
1934 | /* We need to store the options in the action itself since |
1935 | * everything else will go away after flow setup. We can append | |
1936 | * it to tun_info and then point there. | |
1937 | */ | |
1938 | ip_tunnel_info_opts_set(tun_info, | |
1939 | TUN_METADATA_OPTS(&key, key.tun_opts_len), | |
1940 | key.tun_opts_len); | |
a097c0b2 PS |
1941 | add_nested_action_end(*sfa, start); |
1942 | ||
1943 | return err; | |
1944 | } | |
1945 | ||
b940b3d7 JR |
1946 | /* Return false if there are any non-masked bits set. |
1947 | * Mask follows data immediately, before any netlink padding. | |
1948 | */ | |
1949 | static bool validate_masked(u8 *data, int len) | |
1950 | { | |
1951 | u8 *mask = data + len; | |
1952 | ||
1953 | while (len--) | |
1954 | if (*data++ & ~*mask++) | |
1955 | return false; | |
1956 | ||
1957 | return true; | |
1958 | } | |
1959 | ||
a097c0b2 PS |
1960 | static int validate_set(const struct nlattr *a, |
1961 | const struct sw_flow_key *flow_key, | |
1962 | struct sw_flow_actions **sfa, | |
b940b3d7 | 1963 | bool *skip_copy, __be16 eth_type, bool masked, bool log) |
a097c0b2 PS |
1964 | { |
1965 | const struct nlattr *ovs_key = nla_data(a); | |
1966 | int key_type = nla_type(ovs_key); | |
b940b3d7 | 1967 | size_t key_len; |
a097c0b2 PS |
1968 | |
1969 | /* There can be only one key in a action */ | |
1970 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
1971 | return -EINVAL; | |
1972 | ||
b940b3d7 JR |
1973 | key_len = nla_len(ovs_key); |
1974 | if (masked) | |
1975 | key_len /= 2; | |
1976 | ||
a097c0b2 | 1977 | if (key_type > OVS_KEY_ATTR_MAX || |
6da061f4 | 1978 | !check_attr_len(key_len, ovs_key_lens[key_type].len)) |
a097c0b2 PS |
1979 | return -EINVAL; |
1980 | ||
b940b3d7 JR |
1981 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) |
1982 | return -EINVAL; | |
1983 | ||
a097c0b2 PS |
1984 | switch (key_type) { |
1985 | const struct ovs_key_ipv4 *ipv4_key; | |
1986 | const struct ovs_key_ipv6 *ipv6_key; | |
1987 | int err; | |
1988 | ||
1989 | case OVS_KEY_ATTR_PRIORITY: | |
1990 | case OVS_KEY_ATTR_SKB_MARK: | |
372ce973 | 1991 | case OVS_KEY_ATTR_CT_MARK: |
c05e2094 | 1992 | case OVS_KEY_ATTR_CT_LABELS: |
a097c0b2 PS |
1993 | case OVS_KEY_ATTR_ETHERNET: |
1994 | break; | |
1995 | ||
1996 | case OVS_KEY_ATTR_TUNNEL: | |
2baf0e0c PS |
1997 | if (eth_p_mpls(eth_type)) |
1998 | return -EINVAL; | |
1999 | ||
b940b3d7 JR |
2000 | if (masked) |
2001 | return -EINVAL; /* Masked tunnel set not supported. */ | |
2002 | ||
2003 | *skip_copy = true; | |
9233cef7 | 2004 | err = validate_and_copy_set_tun(a, sfa, log); |
a097c0b2 PS |
2005 | if (err) |
2006 | return err; | |
2007 | break; | |
2008 | ||
2009 | case OVS_KEY_ATTR_IPV4: | |
ccf43786 | 2010 | if (eth_type != htons(ETH_P_IP)) |
a097c0b2 PS |
2011 | return -EINVAL; |
2012 | ||
a097c0b2 | 2013 | ipv4_key = nla_data(ovs_key); |
a097c0b2 | 2014 | |
b940b3d7 JR |
2015 | if (masked) { |
2016 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
a097c0b2 | 2017 | |
b940b3d7 JR |
2018 | /* Non-writeable fields. */ |
2019 | if (mask->ipv4_proto || mask->ipv4_frag) | |
2020 | return -EINVAL; | |
2021 | } else { | |
2022 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
2023 | return -EINVAL; | |
2024 | ||
2025 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
2026 | return -EINVAL; | |
2027 | } | |
a097c0b2 PS |
2028 | break; |
2029 | ||
2030 | case OVS_KEY_ATTR_IPV6: | |
ccf43786 | 2031 | if (eth_type != htons(ETH_P_IPV6)) |
a097c0b2 PS |
2032 | return -EINVAL; |
2033 | ||
a097c0b2 | 2034 | ipv6_key = nla_data(ovs_key); |
a0fb56c1 | 2035 | |
b940b3d7 JR |
2036 | if (masked) { |
2037 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
a097c0b2 | 2038 | |
b940b3d7 JR |
2039 | /* Non-writeable fields. */ |
2040 | if (mask->ipv6_proto || mask->ipv6_frag) | |
2041 | return -EINVAL; | |
a097c0b2 | 2042 | |
b940b3d7 JR |
2043 | /* Invalid bits in the flow label mask? */ |
2044 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
2045 | return -EINVAL; | |
2046 | } else { | |
2047 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
2048 | return -EINVAL; | |
2049 | ||
2050 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) | |
2051 | return -EINVAL; | |
2052 | } | |
a097c0b2 PS |
2053 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
2054 | return -EINVAL; | |
2055 | ||
2056 | break; | |
2057 | ||
2058 | case OVS_KEY_ATTR_TCP: | |
b940b3d7 JR |
2059 | if ((eth_type != htons(ETH_P_IP) && |
2060 | eth_type != htons(ETH_P_IPV6)) || | |
2061 | flow_key->ip.proto != IPPROTO_TCP) | |
a097c0b2 PS |
2062 | return -EINVAL; |
2063 | ||
b940b3d7 | 2064 | break; |
a097c0b2 PS |
2065 | |
2066 | case OVS_KEY_ATTR_UDP: | |
b940b3d7 JR |
2067 | if ((eth_type != htons(ETH_P_IP) && |
2068 | eth_type != htons(ETH_P_IPV6)) || | |
2069 | flow_key->ip.proto != IPPROTO_UDP) | |
a097c0b2 PS |
2070 | return -EINVAL; |
2071 | ||
b940b3d7 | 2072 | break; |
ccf43786 SH |
2073 | |
2074 | case OVS_KEY_ATTR_MPLS: | |
2075 | if (!eth_p_mpls(eth_type)) | |
2076 | return -EINVAL; | |
2077 | break; | |
a097c0b2 PS |
2078 | |
2079 | case OVS_KEY_ATTR_SCTP: | |
b940b3d7 JR |
2080 | if ((eth_type != htons(ETH_P_IP) && |
2081 | eth_type != htons(ETH_P_IPV6)) || | |
2082 | flow_key->ip.proto != IPPROTO_SCTP) | |
a097c0b2 PS |
2083 | return -EINVAL; |
2084 | ||
b940b3d7 | 2085 | break; |
a097c0b2 PS |
2086 | |
2087 | default: | |
2088 | return -EINVAL; | |
2089 | } | |
2090 | ||
b940b3d7 JR |
2091 | /* Convert non-masked non-tunnel set actions to masked set actions. */ |
2092 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
2093 | int start, len = key_len * 2; | |
2094 | struct nlattr *at; | |
2095 | ||
2096 | *skip_copy = true; | |
2097 | ||
2098 | start = add_nested_action_start(sfa, | |
2099 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
2100 | log); | |
2101 | if (start < 0) | |
2102 | return start; | |
2103 | ||
2104 | at = __add_action(sfa, key_type, NULL, len, log); | |
2105 | if (IS_ERR(at)) | |
2106 | return PTR_ERR(at); | |
2107 | ||
2108 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
2109 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
2110 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
2111 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
2112 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
2113 | ||
2114 | mask->ipv6_label &= htonl(0x000FFFFF); | |
2115 | } | |
2116 | add_nested_action_end(*sfa, start); | |
2117 | } | |
2118 | ||
a097c0b2 PS |
2119 | return 0; |
2120 | } | |
2121 | ||
2122 | static int validate_userspace(const struct nlattr *attr) | |
2123 | { | |
2124 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
2125 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
2126 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8b7ea2d4 | 2127 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
a097c0b2 PS |
2128 | }; |
2129 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
2130 | int error; | |
2131 | ||
2132 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
2133 | attr, userspace_policy); | |
2134 | if (error) | |
2135 | return error; | |
2136 | ||
2137 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
2138 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
2139 | return -EINVAL; | |
2140 | ||
2141 | return 0; | |
2142 | } | |
2143 | ||
2144 | static int copy_action(const struct nlattr *from, | |
9233cef7 | 2145 | struct sw_flow_actions **sfa, bool log) |
a097c0b2 PS |
2146 | { |
2147 | int totlen = NLA_ALIGN(from->nla_len); | |
2148 | struct nlattr *to; | |
2149 | ||
9233cef7 | 2150 | to = reserve_sfa_size(sfa, from->nla_len, log); |
a097c0b2 PS |
2151 | if (IS_ERR(to)) |
2152 | return PTR_ERR(to); | |
2153 | ||
2154 | memcpy(to, from, totlen); | |
2155 | return 0; | |
2156 | } | |
2157 | ||
a94ebc39 | 2158 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
ccf43786 SH |
2159 | const struct sw_flow_key *key, |
2160 | int depth, struct sw_flow_actions **sfa, | |
9233cef7 | 2161 | __be16 eth_type, __be16 vlan_tci, bool log) |
a097c0b2 PS |
2162 | { |
2163 | const struct nlattr *a; | |
2164 | int rem, err; | |
2165 | ||
2166 | if (depth >= SAMPLE_ACTION_DEPTH) | |
2167 | return -EOVERFLOW; | |
2168 | ||
2169 | nla_for_each_nested(a, attr, rem) { | |
2170 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2171 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2172 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
a6059080 | 2173 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
a097c0b2 | 2174 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
ccf43786 SH |
2175 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
2176 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
a097c0b2 PS |
2177 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
2178 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2179 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
b940b3d7 | 2180 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, |
7804df20 | 2181 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
a94ebc39 JS |
2182 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), |
2183 | [OVS_ACTION_ATTR_CT] = (u32)-1, | |
a097c0b2 PS |
2184 | }; |
2185 | const struct ovs_action_push_vlan *vlan; | |
2186 | int type = nla_type(a); | |
2187 | bool skip_copy; | |
2188 | ||
2189 | if (type > OVS_ACTION_ATTR_MAX || | |
2190 | (action_lens[type] != nla_len(a) && | |
2191 | action_lens[type] != (u32)-1)) | |
2192 | return -EINVAL; | |
2193 | ||
2194 | skip_copy = false; | |
2195 | switch (type) { | |
2196 | case OVS_ACTION_ATTR_UNSPEC: | |
2197 | return -EINVAL; | |
2198 | ||
2199 | case OVS_ACTION_ATTR_USERSPACE: | |
2200 | err = validate_userspace(a); | |
2201 | if (err) | |
2202 | return err; | |
2203 | break; | |
2204 | ||
2205 | case OVS_ACTION_ATTR_OUTPUT: | |
2206 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2207 | return -EINVAL; | |
2208 | break; | |
2209 | ||
7804df20 AZ |
2210 | case OVS_ACTION_ATTR_HASH: { |
2211 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2212 | ||
2213 | switch (act_hash->hash_alg) { | |
2214 | case OVS_HASH_ALG_L4: | |
2215 | break; | |
2216 | default: | |
2217 | return -EINVAL; | |
2218 | } | |
2219 | ||
2220 | break; | |
2221 | } | |
a097c0b2 PS |
2222 | |
2223 | case OVS_ACTION_ATTR_POP_VLAN: | |
e0b8f73f | 2224 | vlan_tci = htons(0); |
a097c0b2 PS |
2225 | break; |
2226 | ||
2227 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2228 | vlan = nla_data(a); | |
2229 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
2230 | return -EINVAL; | |
2231 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2232 | return -EINVAL; | |
ccf43786 | 2233 | vlan_tci = vlan->vlan_tci; |
a097c0b2 PS |
2234 | break; |
2235 | ||
a6059080 AZ |
2236 | case OVS_ACTION_ATTR_RECIRC: |
2237 | break; | |
2238 | ||
ccf43786 SH |
2239 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
2240 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2241 | ||
2242 | if (!eth_p_mpls(mpls->mpls_ethertype)) | |
2243 | return -EINVAL; | |
2244 | /* Prohibit push MPLS other than to a white list | |
2245 | * for packets that have a known tag order. | |
e0b8f73f | 2246 | */ |
ccf43786 SH |
2247 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || |
2248 | (eth_type != htons(ETH_P_IP) && | |
2249 | eth_type != htons(ETH_P_IPV6) && | |
2250 | eth_type != htons(ETH_P_ARP) && | |
2251 | eth_type != htons(ETH_P_RARP) && | |
2252 | !eth_p_mpls(eth_type))) | |
2253 | return -EINVAL; | |
2254 | eth_type = mpls->mpls_ethertype; | |
2255 | break; | |
2256 | } | |
2257 | ||
2258 | case OVS_ACTION_ATTR_POP_MPLS: | |
2259 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2260 | !eth_p_mpls(eth_type)) | |
2261 | return -EINVAL; | |
2262 | ||
2263 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2264 | * as there is no check here to ensure that the new | |
2265 | * eth_type is valid and thus set actions could | |
2266 | * write off the end of the packet or otherwise | |
2267 | * corrupt it. | |
2268 | * | |
2269 | * Support for these actions is planned using packet | |
2270 | * recirculation. | |
2271 | */ | |
2272 | eth_type = htons(0); | |
2273 | break; | |
2274 | ||
a097c0b2 | 2275 | case OVS_ACTION_ATTR_SET: |
2baf0e0c | 2276 | err = validate_set(a, key, sfa, |
b940b3d7 JR |
2277 | &skip_copy, eth_type, false, log); |
2278 | if (err) | |
2279 | return err; | |
2280 | break; | |
2281 | ||
2282 | case OVS_ACTION_ATTR_SET_MASKED: | |
2283 | err = validate_set(a, key, sfa, | |
2284 | &skip_copy, eth_type, true, log); | |
a097c0b2 PS |
2285 | if (err) |
2286 | return err; | |
2287 | break; | |
2288 | ||
2289 | case OVS_ACTION_ATTR_SAMPLE: | |
a94ebc39 | 2290 | err = validate_and_copy_sample(net, a, key, depth, sfa, |
9233cef7 | 2291 | eth_type, vlan_tci, log); |
a097c0b2 PS |
2292 | if (err) |
2293 | return err; | |
2294 | skip_copy = true; | |
2295 | break; | |
2296 | ||
a94ebc39 JS |
2297 | case OVS_ACTION_ATTR_CT: |
2298 | err = ovs_ct_copy_action(net, a, key, sfa, log); | |
2299 | if (err) | |
2300 | return err; | |
2301 | skip_copy = true; | |
2302 | break; | |
2303 | ||
a097c0b2 | 2304 | default: |
7d16c847 | 2305 | OVS_NLERR(log, "Unknown Action type %d", type); |
a097c0b2 PS |
2306 | return -EINVAL; |
2307 | } | |
2308 | if (!skip_copy) { | |
9233cef7 | 2309 | err = copy_action(a, sfa, log); |
a097c0b2 PS |
2310 | if (err) |
2311 | return err; | |
2312 | } | |
2313 | } | |
2314 | ||
2315 | if (rem > 0) | |
2316 | return -EINVAL; | |
2317 | ||
2318 | return 0; | |
2319 | } | |
2320 | ||
b940b3d7 | 2321 | /* 'key' must be the masked key. */ |
a94ebc39 | 2322 | int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
ccf43786 | 2323 | const struct sw_flow_key *key, |
9233cef7 | 2324 | struct sw_flow_actions **sfa, bool log) |
ccf43786 | 2325 | { |
ff27161e PS |
2326 | int err; |
2327 | ||
9233cef7 | 2328 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
ff27161e PS |
2329 | if (IS_ERR(*sfa)) |
2330 | return PTR_ERR(*sfa); | |
2331 | ||
c3bb15b3 | 2332 | (*sfa)->orig_len = nla_len(attr); |
a94ebc39 | 2333 | err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type, |
9233cef7 | 2334 | key->eth.tci, log); |
ff27161e | 2335 | if (err) |
e23775f2 | 2336 | ovs_nla_free_flow_actions(*sfa); |
ff27161e PS |
2337 | |
2338 | return err; | |
ccf43786 SH |
2339 | } |
2340 | ||
a097c0b2 PS |
2341 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
2342 | { | |
2343 | const struct nlattr *a; | |
2344 | struct nlattr *start; | |
2345 | int err = 0, rem; | |
2346 | ||
2347 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
2348 | if (!start) | |
2349 | return -EMSGSIZE; | |
2350 | ||
2351 | nla_for_each_nested(a, attr, rem) { | |
2352 | int type = nla_type(a); | |
2353 | struct nlattr *st_sample; | |
2354 | ||
2355 | switch (type) { | |
2356 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
2357 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
2358 | sizeof(u32), nla_data(a))) | |
2359 | return -EMSGSIZE; | |
2360 | break; | |
2361 | case OVS_SAMPLE_ATTR_ACTIONS: | |
2362 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
2363 | if (!st_sample) | |
2364 | return -EMSGSIZE; | |
2365 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
2366 | if (err) | |
2367 | return err; | |
2368 | nla_nest_end(skb, st_sample); | |
2369 | break; | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | nla_nest_end(skb, start); | |
2374 | return err; | |
2375 | } | |
2376 | ||
2377 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
2378 | { | |
2379 | const struct nlattr *ovs_key = nla_data(a); | |
2380 | int key_type = nla_type(ovs_key); | |
2381 | struct nlattr *start; | |
2382 | int err; | |
2383 | ||
2384 | switch (key_type) { | |
f0cd669f | 2385 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
e23775f2 PS |
2386 | struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); |
2387 | struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; | |
f0cd669f | 2388 | |
a097c0b2 PS |
2389 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2390 | if (!start) | |
2391 | return -EMSGSIZE; | |
2392 | ||
e23775f2 | 2393 | err = ipv4_tun_to_nlattr(skb, &tun_info->key, |
c1fc1411 | 2394 | tun_info->options_len ? |
e23775f2 | 2395 | ip_tunnel_info_opts(tun_info) : NULL, |
c1fc1411 | 2396 | tun_info->options_len); |
a097c0b2 PS |
2397 | if (err) |
2398 | return err; | |
2399 | nla_nest_end(skb, start); | |
2400 | break; | |
f0cd669f | 2401 | } |
a097c0b2 PS |
2402 | default: |
2403 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
2404 | return -EMSGSIZE; | |
2405 | break; | |
2406 | } | |
2407 | ||
2408 | return 0; | |
2409 | } | |
2410 | ||
b940b3d7 JR |
2411 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, |
2412 | struct sk_buff *skb) | |
2413 | { | |
2414 | const struct nlattr *ovs_key = nla_data(a); | |
60642e4f | 2415 | struct nlattr *nla; |
b940b3d7 JR |
2416 | size_t key_len = nla_len(ovs_key) / 2; |
2417 | ||
2418 | /* Revert the conversion we did from a non-masked set action to | |
2419 | * masked set action. | |
2420 | */ | |
60642e4f PS |
2421 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2422 | if (!nla) | |
b940b3d7 JR |
2423 | return -EMSGSIZE; |
2424 | ||
60642e4f PS |
2425 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) |
2426 | return -EMSGSIZE; | |
2427 | ||
2428 | nla_nest_end(skb, nla); | |
b940b3d7 JR |
2429 | return 0; |
2430 | } | |
2431 | ||
a097c0b2 PS |
2432 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
2433 | { | |
2434 | const struct nlattr *a; | |
2435 | int rem, err; | |
2436 | ||
2437 | nla_for_each_attr(a, attr, len, rem) { | |
2438 | int type = nla_type(a); | |
2439 | ||
2440 | switch (type) { | |
2441 | case OVS_ACTION_ATTR_SET: | |
2442 | err = set_action_to_attr(a, skb); | |
2443 | if (err) | |
2444 | return err; | |
2445 | break; | |
2446 | ||
b940b3d7 JR |
2447 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
2448 | err = masked_set_action_to_set_action_attr(a, skb); | |
2449 | if (err) | |
2450 | return err; | |
2451 | break; | |
2452 | ||
a097c0b2 PS |
2453 | case OVS_ACTION_ATTR_SAMPLE: |
2454 | err = sample_action_to_attr(a, skb); | |
2455 | if (err) | |
2456 | return err; | |
2457 | break; | |
a94ebc39 JS |
2458 | |
2459 | case OVS_ACTION_ATTR_CT: | |
2460 | err = ovs_ct_action_to_attr(nla_data(a), skb); | |
2461 | if (err) | |
2462 | return err; | |
2463 | break; | |
2464 | ||
a097c0b2 PS |
2465 | default: |
2466 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2467 | return -EMSGSIZE; | |
2468 | break; | |
2469 | } | |
2470 | } | |
2471 | ||
2472 | return 0; | |
2473 | } |